CN114366965A - A medical ventilator with humidifying and warming function and its working method - Google Patents

Abstract

The application relates to a medical breathing machine with humidification and warming functions, which comprises: the device comprises a controller, a humidifying and warming mechanism, an air-oxygen mixing mechanism, a frequency coordination device, an oxygen tank, an air compressor and a mask. The hot water in the spiral pipe is used for heating the gas, so that the uniformity of heating the gas to be introduced is improved, and the use experience of a user of the breathing machine is improved; the air-oxygen mixing proportion can be conveniently adjusted by adjusting the opening degree of the first flow regulating valve and the second flow regulating valve, so that the convenience of debugging and using the breathing machine is improved; the reciprocating sliding of the sliding block can be simply controlled through the motor, the breathing frequency can be controlled by controlling the forward and reverse rotation switching frequency of the motor, the sliding block displacement can be controlled, the pressure of the gas to be introduced can be adjusted according to the lung pressure of a user, and the use convenience of the breathing machine is improved; through setting up waterproof ventilated membrane, improved the fail safe nature of using under the condition of having guaranteed to carry out the humidification effect to gas.

Description

A medical ventilator with humidifying and warming function and its working method

technical field

The present application relates to the field of medical equipment, and in particular, to a medical ventilator with a humidifying and warming function and a working method thereof.

Background technique

CN201410008729.3 discloses a humidifier for a ventilator and a ventilator, the technical scheme of which is: comprising a water accommodating cavity surrounded by a main body and a bottom plate, and the water accommodating cavity is divided into a closed airtight cavity by a partition plate vertically arranged therein The liquid storage cavity and the heating cavity communicated with the outside world, a channel is provided on the partition plate, and the channel is arranged adjacent to the bottom plate and communicates the liquid storage cavity and the heating cavity, wherein the top wall of the main body is configured to face the bottom plate in the heating cavity. The extended baffle, there is a gap between the baffle and the circumferential side wall of the heating chamber and the liquid level in the heating chamber, and the baffle includes a first cylindrical part and a first cylindrical part connected to the circumferential outer wall of the first cylindrical part. Two cylindrical parts, the first cylindrical part forms an air outlet cavity, the second cylindrical part forms an air intake cavity communicated with the air outlet cavity, and the circumferential side wall, the baffle and the top wall of the baffle plate together form a backflow groove.

The humidifier for a ventilator and the ventilator have the following advantages: a second gap is provided in the second cylindrical part, which prevents the air flow from flowing at a relatively high speed and blowing away the liquid level in the heating chamber, causing the heating plate to dry out. The problem of burning is improved, and the working safety of the humidifier is improved; a first gap is set in the first cylindrical part, which reduces the flow speed of the outlet air leaving the heating chamber, thereby preventing the outlet air from taking away the water in the heating chamber. Or cause the problem of water splashing; the first gap and the second gap are set to be small, so that the baffle can guide the air flow from the air intake cavity to blow the water surface in the heating cavity as much as possible, taking away most of the water vapor Thereby increasing the humidity of the gas.

However, the humidifier and the ventilator for a ventilator also have the following disadvantages: the heating of the gas is not uniform, which may easily cause the user to not breathe smoothly.

CN201610390852.5 discloses a ventilator capable of automatically adjusting breathing frequency, the technical scheme of which is: comprising a main body, a chassis arranged under the main body, an air purification mechanism arranged on one side of the main body, and a breathing mechanism arranged on the other side of the main body , the main body is provided with a display screen, a switch and an operation panel; the breathing mechanism includes a trachea, a breathing adjustment mechanism, an outlet pipe and a breathing mask, and the outlet tube and the breathing mask are both arranged on the breathing adjustment mechanism, and the breathing adjustment mechanism The air duct is communicated with the breathing mask through a breathing adjustment mechanism, and the air outlet pipe is arranged below the breathing adjustment mechanism; a breathing adjustment unit is arranged in the breathing adjustment mechanism, and the breathing adjustment unit includes an inhalation pipe, an exhalation pipe and a breathing pipe. Adjustment pipe, one end of the inhalation pipe is communicated with the air duct, the other end of the inhalation pipe is communicated with the air outlet pipe through the exhalation pipe, and is communicated with the breathing mask through the breathing adjustment pipe, and the inhalation pipe is provided with an inhalation pipe. A valve, an exhalation valve is arranged in the exhalation pipe, and a breathing induction unit is arranged in the breathing regulation pipe; an induction sheet, two springs and two induction units are arranged in the breathing induction unit, and the induction sheet is located in the two Between the two sensing units, two springs are located on both sides of the sensing piece. The sensing unit includes a vent plate and a pressure sensor. The pressure sensor is arranged on the vent plate and is close to one side of the sensing piece. The vent plate is provided with a pressure sensor. There are several air holes, the ventilation plate is parallel to the induction sheet; the air purification mechanism includes a casing, an air outlet arranged above the casing and an air inlet arranged on one side of the casing, and the air outlet communicates with the main body, The casing is provided with a micro water pump, a first conduit, a second conduit, a primary purification unit and a secondary purification unit, the bottom of the casing is provided with an aqueous solution, and the micro water pump is fixed on one side of the interior of the casing, One end of the first conduit is communicated with the micro water pump, the other end of the first conduit is arranged below the liquid level of the aqueous solution, the micro water pump is communicated with the primary purification unit through the second conduit, and the secondary purification unit It is arranged above the primary purification unit, the primary purification unit includes a third conduit and a number of spray heads arranged below the third conduit, the second conduit communicates with each spray head through the third conduit, and the secondary purification unit It includes a gelatinized cotton coarse filter layer, a HEPA filter layer, a nano-silver filter layer, a molecular sieve adsorption layer and a nano-photocatalyst filter layer arranged in sequence from bottom to top; the main body is provided with a central processing unit, the inhalation valve, exhalation valve The valve, pressure sensor and micro water pump are all electrically connected to the central processing unit.

The ventilator that can automatically adjust the breathing frequency has the following advantages: through the contact between the induction sheet and the pressure sensor, the central processor controls the switch of the inspiratory valve and the expiratory valve, so that the breathing frequency of the ventilator is consistent with the breathing frequency of the patient, To ensure smooth breathing of patients during treatment, not only that, the micro-pumps and nozzles in the primary purification unit are used to achieve air circulation treatment, and the secondary purification unit is treated with 5-layer superposition technology to achieve high-efficiency and high-quality air purification. It can also ensure the elimination of harmful substances in the air, provide patients with healthy and environmentally friendly air, and improve the practicability of the device.

However, the ventilator capable of automatically adjusting the breathing frequency also has the following disadvantages: the method of adjusting the breathing frequency is cumbersome and unfavorable for operation.

Therefore, there is a need for a ventilator that can heat the breathing gas evenly and adjust the breathing frequency easily.

SUMMARY OF THE INVENTION

In order to solve the problems of uneven heating of gas and cumbersome breathing adjustment methods, the present application provides a medical ventilator with a humidifying and warming function and a working method thereof.

The application provides a medical ventilator with a humidifying and warming function, comprising: a controller, a humidifying and warming mechanism, an air-oxygen mixing mechanism, a frequency coordination device, an oxygen tank, an air compressor, and a mask;

The air-oxygen mixing mechanism is respectively connected with the oxygen tank and the air compressor for mixing air and oxygen and adjusting the mixing ratio;

The humidifying and warming mechanism cooperates with the air-oxygen mixing mechanism, and is used for humidifying and warming the mixed gas;

The frequency coordination device is arranged on the side of the air-oxygen mixing mechanism, and cooperates with the mask and the air-oxygen mixing mechanism respectively, and is used for receiving a controller control signal to adjust the breathing frequency;

Also included: a temperature sensor for monitoring real-time data of the user's body temperature; a pressure sensor for monitoring the real-time data of the user's lung pressure; a pulse sensor for monitoring the real-time data of the user's arterial pulse; The sensor, pressure sensor and pulse sensor are connected to receive monitoring data and send control signals to the air-oxygen mixing mechanism, humidification and warming mechanism and frequency coordination device.

Further, the humidification and warming mechanism includes: a water storage chamber, arranged at the lower part of the humidification and warming mechanism; a water outlet pipe, arranged at the lower part of the water storage chamber, and communicated with the interior of the water storage chamber; a tee joint, arranged at Below the water storage cavity, the upper end of the three-way joint is communicated with the lower end of the water outlet pipe; the first connecting pipe is arranged on the side of the three-way joint, and the right end of the first connecting pipe is connected to the left side of the three-way joint. The side end is connected; the water pump is arranged below the water storage cavity, the right end of the water pump is connected with the left end of the first connecting pipe; the second connecting pipe is arranged on the side of the water storage cavity, the The lower end of the second connecting pipe is communicated with the upper end of the water pump; the spiral pipe is arranged above the water storage cavity, the left end of the spiral pipe is communicated with the upper end of the second connecting pipe; the return pipe is arranged on the water storage chamber Above the cavity, one end is communicated with the right end of the spiral tube, and the other end is communicated with the upper part of the water storage cavity; the water inlet pipe is arranged below the water storage cavity and communicated with an external water source; the electromagnetic water inlet valve is arranged on the water storage cavity. Below the water cavity, the right end is communicated with the water inlet pipe; the third connecting pipe is arranged below the water storage cavity, one end is communicated with the left end of the electromagnetic water inlet valve, and the other end is connected with the right side of the three-way joint side connection;

It also includes: a heater, arranged at the bottom of the water storage cavity, and connected to the inner wall of the controller; a water temperature sensor, arranged in the middle of the inner wall of the water storage cavity, and electrically connected with the controller; a liquid level sensor, arranged in the storage cavity The upper part of the inner wall of the water cavity is electrically connected with the controller.

By adopting the above technical solution, the uniformity of heating the inflow gas is improved, and the experience of the ventilator user is improved.

Further, the air-oxygen mixing mechanism includes: a filter, which is arranged at the connection between the air-oxygen mixing mechanism and the air compressor, and communicates with the air compressor; a first air inlet joint is arranged at the first filter The side part of the filter is connected with the first filter; the first air inlet pipe is arranged on the side part of the first air inlet joint and communicated with the first air inlet joint; the first flow regulating valve is arranged on the first air inlet joint. The air inlet pipe is communicated with the first air inlet pipe and is electrically connected with the controller; the second air inlet joint is arranged at the connection between the oxygen tank and the air-oxygen mixing mechanism, and communicates with the oxygen tank; the second air inlet pipe , which is arranged on the side of the second inlet joint and communicated with the second inlet joint. The second flow regulating valve is arranged on the second inlet pipe, communicated with the second inlet pipe, and is electrically connected to the controller. a mixing chamber, the left end of which is communicated with the first flow regulating valve and the second flow regulating valve respectively; the air outlet pipe is arranged on the side of the mixing valve and communicated with the right end of the mixing valve;

The air outlet pipe is located inside the spiral pipe of the humidification and warming mechanism.

By adopting the above technical solution and adjusting the opening degrees of the first flow regulating valve and the second flow regulating valve, the air-oxygen mixing ratio can be adjusted conveniently, which improves the convenience of debugging and use of the ventilator.

Further, the texture of the air outlet pipe is a hard thermally conductive material; the texture of the spiral pipe is a hard thermally conductive material.

Further, the lower part of the air outlet pipe is provided with a connecting piece, the connecting piece is arranged at the connection between the spiral pipe and the air outlet pipe, the upper end is fixedly connected with the lower part of the air outlet pipe, and the lower end is fixedly connected with the upper surface of the lower part of the spiral pipe;

The two ends of the connecting piece are connected, and the middle part is provided with a waterproof and breathable membrane, and the texture of the waterproof and breathable membrane is polytetrafluoroethylene.

By adopting the above technical solution, the water vapor evaporated from the hot water in the spiral tube can enter the trachea through the waterproof breathable membrane, increasing the gas humidity, and at the same time isolating water, thereby preventing the water from directly entering the trachea and causing the possibility of water directly entering the user's lungs , improving the safety and reliability of use while ensuring the humidification of the gas.

Further, the filter includes: an air inlet, arranged at the lower part of the filter, and communicated with the air compressor; a first cavity, arranged at the lower part of the filter, communicated with the air inlet; The air outlet is arranged on the upper part of the filter and communicates with the first air inlet joint of the air-oxygen mixing mechanism; the second cavity is arranged on the upper part of the filter and communicates with the air outlet; the grid plate, They are respectively arranged in the lower part of the first cavity, between the first cavity and the second cavity, and at the upper part of the second cavity, and are slidably connected with the inner wall of the filter; the desiccant is arranged in the first cavity; the filter element, arranged in the second cavity.

Further, the frequency coordination device includes: a pressurizing chamber, both ends of which are communicated; an inlet joint, which is arranged at the left end of the pressurizing chamber, is fixedly connected to the pressurizing chamber, and is connected to the air-oxygen mixing mechanism. The outlet pipe is connected; the outlet joint is arranged at the left end of the boosting chamber and communicated with the mask; the second one-way valve is arranged at the connection between the outlet joint and the boosting chamber, and is fixedly connected with the boosting chamber, and the left The side end is communicated with the booster valve, and the right end is communicated with the outlet joint; the motor is arranged on the side of the booster chamber and is electrically connected with the controller; the screw rod is arranged on the motor and is drivingly connected with the motor; The sliding block is arranged in the pressurizing chamber, is slidably connected with the inner wall of the pressurizing chamber, and is threadedly connected with the screw rod; the first one-way valve is symmetrically arranged on both sides of the sliding block and is fixed to the sliding block connect;

The direction of the first one-way valve is left open and right closed, and the direction of the second one-way valve is left open and right closed;

The mask is communicated with the outlet joint of the frequency coordination device, and the mask includes: an exhalation pipe, which is communicated with the mask; and an exhalation valve, which is arranged on the exhalation pipe and is electrically connected to the controller.

By adopting the above technical solution, the reciprocating sliding of the slider can be controlled simply by the motor, the respiration frequency can be controlled by controlling the forward and reverse switching frequency of the motor, and the pressure of the gas to be introduced can be adjusted according to the user's lung pressure by controlling the moving amount of the slider. ease of use of the ventilator.

Further, the first one-way valve includes: a sliding cavity, with two ends communicating; a first limiting bump, symmetrically arranged at one end of the sliding cavity, and fixedly connected with the sliding cavity; a ball plug, provided with In the sliding cavity, it is slidably connected with the inner wall of the sliding cavity, and abuts with the first limiting projection, and the diameter of the ball plug is larger than the distance between the two symmetrically arranged first limiting projections; the second A limit bump is symmetrically arranged on the side end of the sliding cavity opposite to the first limit bump, and is fixedly connected with the sliding cavity; a support spring is arranged in the sliding cavity and is located between the ball plug and the sliding cavity. Between the second limiting bumps, one end abuts the side of the ball plug, and the other end abuts the side of the second limiting bump;

The structure of the second one-way valve is the same as that of the first one-way valve.

A working method of a medical ventilator with a humidifying and warming function, comprising the following steps:

Step S1, human body monitoring, each sensor monitors human body data in real time, and sends it to the controller;

Step S2, the temperature and humidity are adjusted, the controller controls the electromagnetic water inlet valve to open, the water pump starts, and the water inlet pipe enters the water storage chamber through the electromagnetic water inlet valve, the three-way joint, the water pump and the spiral pipe, until the water level in the water storage chamber reaches the When the liquid level sensor is used, the heater starts and heats the water in the water storage chamber. During heating, the water pump continues to run until the heater stops running when the water temperature monitored by the water temperature sensor matches the body temperature;

Step S3, the air-oxygen ratio is adjusted, the controller adjusts the openings of the first flow regulating valve and the second flow regulating valve respectively, and the required air-oxygen mixing ratio is the opening ratio of the first flow regulating valve and the second flow regulating valve ;

Step S4, coordinate the delivery, the controller controls the motor to rotate alternately forward and reverse periodically, and adjusts the switching frequency of the alternating rotation of the motor to be consistent with the breathing frequency, and the slider is driven to reciprocate: when the slider moves in reverse, the pressure increases. The pressure in the cavity decreases, the second one-way valve is locked, and the mixed gas in the air-oxygen mixing mechanism pushes the ball plug of the first one-way valve to fill the mixed gas into the boosting cavity; when the slider moves forward, The pressure in the boosting chamber decreases, the first one-way valve is locked, the gas in the boosting chamber pushes the second one-way valve open, and the mixed gas enters the human body through the mask.

Further, the step S1 includes: step S11, heartbeat monitoring, real-time monitoring of the user's arterial pulse by a pulse sensor, providing switching cycle data for step S4, in the step S4, the motor switching frequency, that is, the breathing frequency, is four times the pulse beating frequency. Step S12, temperature monitoring, real-time monitoring of human body temperature by a temperature sensor, providing temperature reference data for step S2; step S13, lung pressure monitoring, real-time monitoring of the user's lung pressure by a pressure sensor, which is the amount of slider movement in step S4 Provides data that the higher the lung pressure, the larger the slider movement required, and the lower the lung pressure, the smaller the slider movement required.

To sum up, the present application includes the following beneficial technical effects:

1. The gas is heated by the hot water in the spiral tube, which improves the uniformity of the heating of the incoming gas and improves the experience of the ventilator user;

2. By adjusting the opening of the first flow control valve and the second flow control valve, the air-oxygen mixing ratio can be easily adjusted, which improves the convenience of debugging and using the ventilator;

3. The reciprocating sliding of the slider can be controlled simply by the motor, the respiration frequency can be controlled by controlling the switching frequency of the forward and reverse rotation of the motor, and the pressure of the gas to be injected can be adjusted according to the user's lung pressure by controlling the movement of the slider, which improves the use of the ventilator. convenience;

4. By setting the waterproof breathable membrane, the water vapor evaporated from the hot water in the spiral tube can enter the trachea through the waterproof breathable membrane, increase the gas humidity, and at the same time isolate the water to prevent the water from directly entering the trachea and causing the water to directly enter the user's lungs. It is possible to improve the safety and reliability of use under the condition of ensuring the humidification of the gas.

Description of drawings

FIG. 1 is a schematic diagram of the overall structure of a medical ventilator with a humidifying and warming function according to an embodiment of the present application.

2 is a partial enlarged view of a humidification and warming mechanism of a medical ventilator with a humidification and warming function according to an embodiment of the present application.

3 is a partial enlarged view of an air-oxygen mixing mechanism of a medical ventilator with a humidifying and warming function according to an embodiment of the present application.

FIG. 4 is a partial enlarged view of a filter of a medical ventilator with a humidifying and warming function according to an embodiment of the present application.

5 is a partial enlarged view of a connector of a medical ventilator with a humidifying and warming function according to an embodiment of the present application.

6 is a partial enlarged view of a frequency coordination device for a medical ventilator with a humidifying and warming function according to an embodiment of the present application.

FIG. 7 is a partial enlarged view of a one-way valve of a medical ventilator with a humidifying and warming function according to an embodiment of the present application.

FIG. 8 is a partial enlarged view of a mask of a medical ventilator with a humidifying and warming function according to an embodiment of the present application.

Description of reference numbers:

1. Controller;

2. Humidification and warming mechanism; 201, water storage chamber; 202, outlet pipe; 203, tee joint; 204, first connecting pipe; 205, water pump; 206, second connecting pipe; 207, spiral pipe; 208, return flow pipe; 209, water inlet pipe; 210, electromagnetic water inlet valve; 211, third connecting pipe; 212, heater; 213, water temperature sensor; 214, liquid level sensor;

3. Air-oxygen mixing mechanism; 31, filter; 311, air inlet; 312, first cavity; 313, air outlet; 314, second cavity; 315, grid plate; 316, desiccant; 317, filter element; 32, the first intake joint; 33, the first intake pipe; 34, the first flow regulating valve; 35, the second intake joint; 36, the second intake pipe; 37, the second flow regulating valve; 38, Mixing chamber; 39. Outlet pipe;

4. Connector; 41. Waterproof and breathable membrane;

5. Frequency coordination device; 51. Pressurization chamber; 52. Inlet connector; 53. First one-way valve; 531, Sliding cavity; 532, Ball plug; 533, Support spring; 535, the second limit bump; 54, the outlet joint; 55, the second one-way valve; 56, the motor; 57, the screw; 58, the slider;

6. Mask; 61. Exhalation tube; 62. Exhalation valve.

Detailed ways

Below with reference to the accompanying drawings, through the description of the embodiments, the specific implementation of the present application, such as the shape and structure of each component involved, the mutual position and connection relationship between each part, the function and working principle of each part, and the manufacturing process and operation and use methods, etc., are described in further detail to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solutions of the present invention. For the convenience of description, the directions mentioned in this application are based on the directions shown in the accompanying drawings.

Referring to Figures 1-8, a medical ventilator with a humidifying and warming function includes: a controller 1, a humidifying and warming mechanism 2, an air-oxygen mixing mechanism 3, a frequency coordination device 5, an oxygen tank, and an air compressor , mask 6;

The air-oxygen mixing mechanism 3 is respectively connected with the oxygen tank and the air compressor for mixing air and oxygen and adjusting the mixing ratio;

The humidification and warming mechanism 2 cooperates with the air-oxygen mixing mechanism 3 for humidifying and warming the mixed gas;

The frequency coordination device 5 is arranged on the side of the air-oxygen mixing mechanism 3, and cooperates with the mask 6 and the air-oxygen mixing mechanism 3 respectively, and is used for receiving the control signal of the controller 1 to adjust the breathing frequency;

It also includes: a temperature sensor for monitoring the real-time data of the user's body temperature; a pressure sensor for monitoring the real-time data of the user's lung pressure; a pulse sensor for monitoring the real-time data of the user's arterial pulse; The temperature sensor, pressure sensor and pulse sensor are connected to receive monitoring data, and send control signals to the air-oxygen mixing mechanism 3 , the humidification and warming mechanism 2 and the frequency coordination device 5 .

The humidifying and warming mechanism 2 includes: a water storage chamber 201, which is arranged at the lower part of the humidifying and warming mechanism 2; a water outlet pipe 202, which is arranged at the lower part of the water storage chamber 201 and communicates with the interior of the storage chamber 201; 203 is arranged below the water storage cavity 201, the upper end of the three-way joint 203 is communicated with the lower end of the water outlet pipe 202; the first connecting pipe 204 is arranged on the side of the three-way joint 203, the first connection The right end of the pipe 204 is communicated with the left end of the tee joint 203; the water pump 205 is arranged below the water storage chamber 201, and the right end of the water pump 205 is communicated with the left end of the first connecting pipe 204; the second A connecting pipe 206 is arranged on the side of the water storage cavity 201, and the lower end of the second connecting pipe 206 communicates with the upper end of the water pump 205; a spiral pipe 207 is arranged above the water storage cavity 201, and the spiral pipe 207 The left end is connected with the upper end of the second connecting pipe 206; the return pipe 208 is arranged above the water storage cavity 201, one end is connected with the right end of the spiral pipe 207, and the other end is connected with the upper part of the water storage cavity 201; The water inlet pipe 209 is arranged below the water storage cavity 201 and communicates with an external water source; the electromagnetic water inlet valve 210 is arranged below the water storage cavity 201, and the right end is communicated with the water inlet pipe 209; the third connecting pipe 211, which is arranged below the water storage cavity 201, one end communicates with the left end of the electromagnetic water inlet valve 210, and the other end communicates with the right end of the three-way joint 203;

It also includes: a heater 212, arranged at the bottom of the water storage cavity 201, and connected to the inner wall of the controller 1; a water temperature sensor 213, arranged in the middle of the inner wall of the water storage cavity 201, and electrically connected to the controller 1; a liquid level sensor 214 , which is arranged on the upper part of the inner wall of the water storage chamber 201 and is electrically connected to the controller 1 .

The air-oxygen mixing mechanism 3 includes: a filter 31, which is arranged at the connection between the air-oxygen mixing mechanism 3 and the air compressor, and communicates with the air compressor; a first air inlet joint 32, which is arranged at the first The side part of the filter 31 is in communication with the first filter 31; the first air inlet pipe 33 is arranged on the side part of the first air inlet joint 32 and communicated with the first air inlet joint 32; the first flow regulating valve 34 , arranged on the first air inlet pipe 33, communicated with the first air inlet pipe 33, and electrically connected with the controller 1; the second air inlet joint 35 is arranged on the oxygen tank and the air-oxygen mixing mechanism 3 The connection point is communicated with the oxygen tank; the second intake pipe 36 is arranged on the side of the second intake joint 35 and communicated with the second intake joint 35, and the second flow regulating valve 37 is arranged on the second intake joint 35. The air inlet pipe 36 is in communication with the second air inlet pipe 36 and is electrically connected to the controller 1; the mixing chamber 38, the left end of the mixing chamber 38 is connected with the first flow regulating valve 34 and the second flow regulating valve 37 respectively; the air outlet pipe 39, is arranged on the side of the mixing valve and communicated with the right end of the mixing valve;

The air outlet pipe 39 is located inside the spiral pipe 207 of the humidification and warming mechanism 2 .

The texture of the air outlet pipe 39 is a hard thermally conductive material; the texture of the spiral pipe 207 is a hard thermally conductive material.

The lower part of the air outlet pipe 39 is provided with a connecting piece 4, the connecting piece 4 is arranged at the connection between the spiral pipe 207 and the air outlet pipe 39, the upper end is fixedly connected with the lower part of the air outlet pipe 39, and the lower end is fixedly connected with the upper surface of the lower part of the spiral pipe 207. ;

The two ends of the connecting piece 4 are connected, and a waterproof and breathable membrane 41 is arranged in the middle. The texture of the waterproof and breathable membrane 41 is polytetrafluoroethylene.

The filter 31 includes: an air inlet 311 arranged at the lower part of the filter 31 and communicated with the air compressor; a first cavity 312 arranged at the lower part of the filter 31 and connected to the air inlet 311 is communicated; the air outlet 313 is arranged on the upper part of the filter 31 and communicates with the first air inlet joint 32 of the air-oxygen mixing mechanism 3; the second cavity 314 is arranged on the upper part of the filter 31 and communicates with the The air outlet 313 communicates with the air outlet 313; the grid plates 315 are respectively arranged at the lower part of the first cavity 312, between the first cavity 312 and the second cavity 314, and at the upper part of the second cavity 314, and slide with the inner wall of the filter 31. connection; the desiccant 316 is arranged in the first cavity 312 ; the filter element 317 is arranged in the second cavity 314 .

The frequency coordination device 5 includes: a pressurizing chamber 51, both ends of which are communicated; an inlet joint 52, which is arranged at the left end of the pressurizing chamber 51, is fixedly connected to the pressurizing chamber 51, and is mixed with the air-oxygen The outlet pipe 39 of the mechanism 3 is in communication; the outlet joint 54 is arranged at the left end of the pressurizing chamber 51 and communicates with the mask 6; At the position, it is fixedly connected with the boosting chamber 51, the left end is communicated with the boosting valve, and the right end is communicated with the outlet joint 54; the motor 56 is arranged on the side of the boosting chamber 51, and is electrically connected with the controller 1; The screw rod 57 is arranged on the motor 56 and is drivingly connected with the motor 56; connection; the first one-way valve 53 is symmetrically arranged on both sides of the sliding block 58 and is fixedly connected with the sliding block 58;

The direction of the first one-way valve 53 is left open and right closed, and the direction of the second one-way valve 55 is left open and right closed;

The mask 6 is communicated with the outlet joint 54 of the frequency coordination device 5, and the mask 6 includes: an exhalation pipe 61, which is communicated with the mask 6; The controller 1 is electrically connected.

The first one-way valve 53 includes: a sliding cavity 531, two ends of which are communicated; a first limiting protrusion 534, symmetrically arranged at one end of the sliding cavity 531, and fixedly connected with the sliding cavity 531; a ball plug 532, which is arranged in the sliding cavity 531, is slidably connected with the inner wall of the sliding cavity 531, and abuts with the first limiting projection 534, and the diameter of the ball plug 532 is larger than the two symmetrically arranged first limiting blocks 532. the spacing between the positioning bumps 534; the second limiting bump 535 is symmetrically arranged on the side end of the sliding cavity 531 opposite to the first limiting bump 534, and is fixedly connected with the sliding cavity 531; the supporting spring 533, Set in the sliding cavity 531, between the ball plug 532 and the second limiting bump 535, one end abuts the side of the ball plug 532, and the other end abuts the side of the second limiting bump 535 catch;

The structure of the second one-way valve 55 is the same as that of the first one-way valve 53 .

A working method of a medical ventilator with a humidifying and warming function, comprising the following steps:

Step S1, human body monitoring, each sensor monitors human body data in real time, and sends it to the controller 1;

Step S2, the temperature and humidity are adjusted, the controller 1 controls the electromagnetic water inlet valve 210 to open, the water pump 205 is started, and the water inlet pipe 209 enters the water storage chamber 201 through the electromagnetic water inlet valve 210, the three-way joint 203, the water pump 205, and the spiral pipe 207. until the water level in the water storage chamber 201 reaches the liquid level sensor 214, the heater 212 starts and will heat the water in the water storage chamber 201. During heating, the water pump 205 continues to run until the water temperature monitored by the water temperature sensor 213 matches the body temperature. The heater 212 stops running;

Step S3, the air-oxygen ratio is adjusted, the controller 1 adjusts the opening of the first flow control valve 34 and the second flow control valve 37 respectively, and the required air-oxygen mixing ratio is the first flow control valve 34 and the second flow control valve. 37 opening ratio;

Step S4, coordinated delivery, the controller 1 controls the motor 56 to rotate alternately forward and reverse periodically, and adjusts the switching frequency of the forward and reverse rotation of the motor 56 to be consistent with the breathing frequency, and the slider 58 is driven to reciprocate: the slider 58 is reversed During movement, the pressure in the boosting chamber 51 decreases, the second one-way valve 55 is locked, and the mixed gas in the air-oxygen mixing mechanism 3 pushes open the ball plug 532 of the first one-way valve 53 to replenish the pressure in the boosting chamber 51 . When the slider 58 moves forward, the pressure in the boosting chamber 51 decreases, the first one-way valve 53 is locked, the gas in the boosting chamber 51 pushes the second one-way valve 55 open, and the mixed gas passes through the mask 6 into the human body.

The step S1 includes: step S11, heartbeat monitoring, real-time monitoring of the user's arterial pulse by a pulse sensor, providing switching cycle data for step S4, wherein the switching frequency of the motor 56 in the step S4, that is, the breathing frequency is four times the pulse beating frequency; Step S12, temperature monitoring, real-time monitoring of human body temperature by the temperature sensor, providing temperature reference data for step S2; step S13, lung pressure monitoring, real-time monitoring of the user's lung pressure by the pressure sensor, providing for the amount of movement of the slider 58 in step S4. Data, the higher the pulmonary pressure, the larger the required displacement of the slider 58, and the lower the lung pressure, the smaller the required displacement of the slider 58.

In the embodiment of the present application, the working principle of a medical ventilator with a humidifying and warming function and a working method thereof are as follows: the motor performs periodic forward and reverse rotation alternately, and the switching frequency of the forward and reverse rotation of the motor is consistent with the breathing frequency, and the slider rotates alternately. Driven to reciprocate: when the slider moves in the reverse direction, the pressure in the boosting chamber decreases, the second one-way valve is locked, and the mixed gas in the air-oxygen mixing mechanism pushes open the ball plug of the first one-way valve, increasing the pressure. The pressure chamber is filled with mixed gas; when the slider moves forward, the pressure in the booster chamber decreases, the first one-way valve is locked, the gas in the booster chamber pushes the second one-way valve, and the mixed gas enters the human body through the mask . In this way, the breathing action matching the breathing of the human body is realized.

In the embodiment of the present application, the hot water in the spiral tube heats the gas, which improves the uniformity of heating the gas to be introduced, and improves the experience of the ventilator user; by adjusting the first flow regulating valve and the second flow regulating valve By adjusting the valve opening, the air-oxygen mixing ratio can be easily adjusted, which improves the convenience of ventilator debugging and use; the breathing frequency can be controlled simply by the reciprocating sliding of the motor control slider, and the switching frequency of the forward and reverse rotation of the motor can be controlled. The pressure of the gas to be introduced can be adjusted according to the user's lung pressure by the block displacement, which improves the convenience of the ventilator.

In the embodiment of the present application, the water vapor evaporated from the hot water in the spiral pipe can enter the air outlet pipe through the waterproof breathable membrane, which increases the humidity of the gas, and at the same time isolates water, thereby preventing the water from directly entering the air outlet pipe and causing the possibility of water directly entering the user's lungs , improving the safety and reliability of use while ensuring the humidification of the gas.

The present invention and its embodiments have been described above schematically, and the description is not restrictive, and what is shown in the accompanying drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it, without departing from the purpose of the present invention, non-creatively designed structures and embodiments similar to the technical solution should all belong to the protection scope of the present invention.

Claims (10)

1. A medical breathing machine with humidification and warming functions is characterized by comprising: the device comprises a controller (1), a humidifying and warming mechanism (2), an air-oxygen mixing mechanism (3), a frequency coordination device (5), an oxygen tank, an air compressor and a mask (6);

the air-oxygen mixing mechanism (3) is respectively connected with the oxygen tank and the air compressor and is used for mixing air and oxygen and adjusting the mixing proportion;

the humidifying and warming mechanism (2) is matched with the air-oxygen mixing mechanism (3) and is used for humidifying and warming the mixed gas;

the frequency coordination device (5) is arranged on the side part of the air-oxygen mixing mechanism (3), is respectively matched with the mask (6) and the air-oxygen mixing mechanism (3), and is used for receiving a control signal of the controller (1) to adjust the respiratory frequency;

further comprising: the temperature sensor is used for monitoring real-time data of the body temperature of the user; a pressure sensor for monitoring real-time data of the user's pulmonary pressure; the pulse sensor is used for monitoring real-time data of arterial pulsation of a user; and the controller (1) is respectively connected with the temperature sensor, the pressure sensor and the pulse sensor, receives monitoring data and sends control signals to the air-oxygen mixing mechanism (3), the humidifying and warming mechanism (2) and the frequency coordination device (5).

2. The medical ventilator with humidifying and warming functions as claimed in claim 1, wherein:

the humidification/warming mechanism (2) includes: the water storage cavity (201) is arranged at the lower part of the humidifying and warming mechanism (2); the water outlet pipe (202) is arranged at the lower part of the water storage cavity (201) and is communicated with the interior of the water storage cavity (201); the three-way joint (203) is arranged below the water storage cavity (201), and the upper end of the three-way joint (203) is communicated with the lower end of the water outlet pipe (202); a first connecting pipe (204) arranged at the side part of the three-way joint (203), wherein the right side end of the first connecting pipe (204) is communicated with the left side end of the three-way joint (203); the water pump (205) is arranged below the water storage cavity (201), and the right side end of the water pump (205) is communicated with the left side end of the first connecting pipe (204); the second connecting pipe (206) is arranged on the side of the water storage cavity (201), and the lower end of the second connecting pipe (206) is communicated with the upper end of the water pump (205); the spiral pipe (207) is arranged above the water storage cavity (201), and the left side end of the spiral pipe (207) is communicated with the upper end of the second connecting pipe (206); the return pipe (208) is arranged above the water storage cavity (201), one end of the return pipe is communicated with the right side end of the spiral pipe (207), and the other end of the return pipe is communicated with the upper part of the water storage cavity (201); the water inlet pipe (209) is arranged below the water storage cavity (201) and is communicated with an external water source; the electromagnetic water inlet valve (210) is arranged below the water storage cavity (201), and the right side end of the electromagnetic water inlet valve is communicated with the water inlet pipe (209); the third connecting pipe (211) is arranged below the water storage cavity (201), one end of the third connecting pipe is communicated with the left side end of the electromagnetic water inlet valve (210), and the other end of the third connecting pipe is communicated with the right side end of the three-way joint (203);

further comprising: the heater (212) is arranged at the bottom of the water storage cavity (201) and is connected with the inner wall of the controller (1); the water temperature sensor (213) is arranged in the middle of the inner wall of the water storage cavity (201) and is electrically connected with the controller (1); and the liquid level sensor (214) is arranged on the upper part of the inner wall of the water storage cavity (201) and is electrically connected with the controller (1).

3. The medical ventilator with humidifying and warming functions as claimed in claim 2, characterized in that:

the air-oxygen mixing mechanism (3) comprises: the filter (31) is arranged at the joint of the air-oxygen mixing mechanism (3) and the air compressor and is communicated with the air compressor; a first air inlet joint (32) which is arranged at the side part of the first filter (31) and is communicated with the first filter (31); a first air inlet pipe (33) which is arranged at the side part of the first air inlet joint (32) and is communicated with the first air inlet joint (32); the first flow regulating valve (34) is arranged on the first air inlet pipe (33), is communicated with the first air inlet pipe (33), and is electrically connected with the controller (1); the second air inlet joint (35) is arranged at the joint of the oxygen tank and the air-oxygen mixing mechanism (3) and is communicated with the oxygen tank; the second air inlet pipe (36) is arranged at the side part of the second air inlet joint (35) and communicated with the second air inlet joint (35), and the second flow regulating valve (37) is arranged on the second air inlet pipe (36), communicated with the second air inlet pipe (36) and electrically connected with the controller (1); a mixing chamber (38) having left-side ends respectively communicating with the first flow rate regulating valve (34) and the second flow rate regulating valve (37); the air outlet pipe (39) is arranged on the side part of the mixing valve and is communicated with the right side end of the mixing valve;

the air outlet pipe (39) is positioned at the inner side of the spiral pipe (207) of the humidifying and warming mechanism (2).

4. The medical ventilator with humidifying and warming functions as claimed in claim 3, wherein:

the texture of the air outlet pipe (39) is hard heat conduction material; the texture of the spiral tube (207) is hard heat conduction material.

5. The medical ventilator with humidifying and warming functions as claimed in claim 4, wherein:

the lower part of the air outlet pipe (39) is provided with a connecting piece (4), the connecting piece (4) is arranged at the joint of the spiral pipe (207) and the air outlet pipe (39), the upper end of the connecting piece is fixedly connected with the lower part of the air outlet pipe (39), and the lower end of the connecting piece is fixedly connected with the upper surface of the lower part of the spiral pipe (207);

the both ends intercommunication of connecting piece (4), the middle part is provided with waterproof ventilated membrane (41), waterproof ventilated membrane (41) texture is polytetrafluoroethylene.

6. The medical ventilator with humidifying and warming functions as claimed in claim 4, wherein:

the filter (31) comprises: an air inlet (311) provided at a lower portion of the filter (31) and communicating with the air compressor; a first chamber (312) disposed at a lower portion of the filter (31) and communicating with the inlet port (311); the air outlet (313) is arranged at the upper part of the filter (31) and is communicated with the first air inlet joint (32) of the air-oxygen mixing mechanism (3); a second chamber (314) disposed at an upper portion of the filter (31) and communicating with the air outlet (313); the grid plate (315) is respectively arranged at the lower part of the first cavity (312), between the first cavity (312) and the second cavity (314) and at the upper part of the second cavity (314) and is in sliding connection with the inner wall of the filter (31); a desiccant (316) disposed within the first cavity (312); a cartridge (317) disposed within the second cavity (314).

7. The medical ventilator with humidifying and warming functions as claimed in claim 4, wherein:

the frequency coordination device (5) comprises: a pressurizing cavity (51) with two ends communicated; the inlet joint (52) is arranged at the left end of the pressurizing cavity (51), is fixedly connected with the pressurizing cavity (51), and is communicated with the air outlet pipe (39) of the air-oxygen mixing mechanism (3); an outlet joint (54) which is arranged at the left end of the pressurization cavity (51) and is communicated with the face mask (6); the second one-way valve (55) is arranged at the joint of the outlet joint (54) and the pressurizing cavity (51) and is fixedly connected with the pressurizing cavity (51), the left side end of the second one-way valve is communicated with the pressurizing valve, and the right side end of the second one-way valve is communicated with the outlet joint (54); the motor (56) is arranged on the side part of the pressurization cavity (51) and is electrically connected with the controller (1); the screw rod (57) is arranged on the motor (56) and is in driving connection with the motor (56); the sliding block (58) is arranged in the pressurizing cavity (51), is in sliding connection with the inner wall of the pressurizing cavity (51), and is in threaded driving connection with the screw rod (57); the first one-way valves (53) are symmetrically arranged on two sides of the sliding block (58) and are fixedly connected with the sliding block (58);

the first one-way valve (53) is opened leftwards and closed rightwards, and the second one-way valve (55) is opened leftwards and closed rightwards;

the face mask (6) is in communication with an outlet connection (54) of the frequency coordination device (5), the face mask (6) comprising: an exhalation tube (61) communicating with the mask (6); the exhalation valve (62) is arranged on the exhalation tube (61) and is electrically connected with the controller (1).

8. The medical ventilator with humidifying and warming functions as claimed in claim 7, wherein:

the first check valve (53) includes: a sliding cavity (531) with two ends communicated; the first limiting lugs (534) are symmetrically arranged at one side end of the sliding cavity (531) and are fixedly connected with the sliding cavity (531); the ball plug (532) is arranged in the sliding cavity (531), is connected with the inner wall of the sliding cavity (531) in a sliding mode, and is abutted against the first limiting convex blocks (534), and the diameter of the ball plug (532) is larger than the distance between the two first limiting convex blocks (534) which are symmetrically arranged; the second limiting lug (535) is symmetrically arranged at one side end of the sliding cavity (531) opposite to the first limiting lug (534) and is fixedly connected with the sliding cavity (531); the supporting spring (533) is arranged in the sliding cavity (531), is positioned between the ball plug (532) and the second limiting lug (535), and has one end abutted against the side part of the ball plug (532) and the other end abutted against the side part of the second limiting lug (535);

the second check valve (55) is identical in structure to the first check valve (53).

9. A working method of a medical breathing machine with the functions of humidification and warming is characterized by comprising the following steps:

step S1, monitoring human body, wherein each sensor monitors human body data in real time and sends the human body data to the controller (1);

step S2, temperature and humidity adjustment is carried out, the controller (1) controls the electromagnetic water inlet valve (210) to be opened, the water pump (205) is started, the water inlet pipe (209) enters the water storage cavity (201) through the electromagnetic water inlet valve (210), the three-way joint (203), the water pump (205) and the spiral pipe (207), the heater (212) is started and heats water in the water storage cavity (201) when the water level in the water storage cavity (201) reaches the liquid level sensor (214), the water pump (205) continuously operates during heating, and the heater (212) stops operating until the water temperature sensor (213) monitors that the water temperature is matched with the body temperature of a human body;

step S3, adjusting the air-oxygen ratio, wherein the controller (1) respectively adjusts the opening degrees of the first flow regulating valve (34) and the second flow regulating valve (37), and the required air-oxygen mixing ratio is the opening degree ratio of the first flow regulating valve (34) and the second flow regulating valve (37);

step S4, coordinating the conveying, the controller (1) controls the motor (56) to periodically rotate in a positive and negative alternate mode, the switching frequency of the motor (56) in the positive and negative alternate rotation is adjusted to be consistent with the breathing frequency, and the sliding block (58) is driven to reciprocate: when the sliding block (58) moves reversely, the pressure in the pressurizing cavity (51) is reduced, the second one-way valve (55) is locked, and the mixed gas in the air-oxygen mixing mechanism (3) pushes away the ball plug (532) of the first one-way valve (53) to supplement the mixed gas into the pressurizing cavity (51); when the sliding block (58) moves forwards, the pressure in the pressurizing cavity (51) is reduced, the first one-way valve (53) is locked, the gas in the pressurizing cavity (51) pushes the second one-way valve (55), and the mixed gas enters a human body through the face mask (6).

10. The operating method of the medical ventilator with the humidifying and warming functions as claimed in claim 9, wherein:

the step S1 includes: step S11, heartbeat monitoring, namely monitoring the artery pulsation of the user in real time by a pulse sensor to provide switching cycle data for step S4, wherein the switching frequency of the motor (56), namely the respiratory frequency in the step S4 is four times of the pulse pulsation frequency; step S12, monitoring the temperature, namely monitoring the body temperature of the human body in real time by a temperature sensor to provide temperature reference data for the step S2; and S13, monitoring the lung pressure, namely monitoring the lung pressure of the user in real time by a pressure sensor, providing data for the sliding amount of the sliding block (58) in the step S4, wherein the higher the lung pressure is, the larger the required sliding amount of the sliding block (58) is, and the lower the lung pressure is, the smaller the required sliding amount of the sliding block (58) is.

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