JP2013188402A - Disinfectant atomizer - Google Patents

Abstract

Disclosed is a disinfectant spraying apparatus that efficiently discharges a disinfectant into a high-temperature gas and discharges the disinfectant.
A vaporizing chamber (1) and heating means for heating and vaporizing a supplied sterilizing agent to a boiling point or higher in the vaporizing chamber (1) are provided, and the vaporizing chamber (1) includes a heating cylinder (1a). ). The heating means includes a heating cylinder (1a) and an induction heating coil (4) wound around the heating cylinder (1a), or is attached so as to be in close contact with the heating cylinder (1a) and its outer peripheral wall. And a dielectric heating conductive member (3) and an induction heating coil (4) wound around the dielectric heating conductive member (3).
[Selection] Figure 1

Description

  The present invention relates to an apparatus for spraying a disinfectant such as hydrogen peroxide.

  Conventionally, when sterilizing a packaging material such as a container or a resin film, a sterilizing agent such as hydrogen peroxide is sprayed toward the packaging material so that a mist of the sterilizing agent is attached to the surface of the packaging material. In that case, it is desirable that the particles in the mist of the disinfectant be as fine and uniform as possible because the particles uniformly adhere to the surface of the packaging material and improve disinfectability. Conventionally, as a disinfectant spraying device capable of obtaining such a mist, a spray part for spraying a liquid disinfectant with compressed air, a vaporizing chamber for introducing the sprayed disinfectant, and a vaporizing chamber for the sprayed disinfectant And a heating means for heating to the boiling point or higher and vaporizing. The vaporized disinfectant is discharged as a mist from the discharge nozzle at the end of the vaporization chamber and guided to the packaging material (for example, see Patent Document 1).

  On the other hand, when a resin film or the like is heated or cooled, a roller may be used. A heat medium such as oil for heating or cooling the roller is supplied into the roller. However, if the heat medium is heated by a heat generating heater, the heat generation efficiency is poor. An induction heating apparatus is used in which an induction coil is disposed in a spiral hollow of a pipe that is passed through a spirally wound pipe. According to this induction heating device, it is possible to efficiently heat the heat medium in the pipe by applying an AC voltage to the induction coil (see, for example, Patent Document 2).

Japanese Patent No. 3071446 JP 2007-152651 A

  In the conventional disinfectant spraying device, the heating means is a ribbon heater wound around the peripheral surface of the cylinder-shaped vaporizing chamber, a band heater, a cast-in heater, etc., so the heat generation efficiency and heat transfer efficiency are poor, and the heater temperature is low. For example, even if it is 300 ° C., when the heat capacity is not sufficient and a sterilizing agent such as hydrogen peroxide comes out as a mist from the nozzle at the end of the vaporization chamber, it is lowered to about 100 ° C., and the spray amount is also limited. There is a problem.

  On the other hand, according to the conventional induction heating apparatus, fluid such as oil can be efficiently heated, and thus it is widely used in various fields. However, efficient gasification or mist of a disinfectant such as hydrogen peroxide is used. The use for conversion cannot be seen.

  An object of the present invention is to eliminate such problems.

  In order to solve the above problems, the present invention employs the following configuration.

  That is, the invention according to claim 1 is a heating means for supplying a sterilizing agent, a vaporizing chamber (1) for introducing the supplied sterilizing agent, and heating the supplied sterilizing agent to the boiling point or more in the vaporizing chamber (1). In the sterilizing agent spraying apparatus comprising the heating means for vaporizing, the vaporizing chamber (1) is formed by a heating cylinder (1a), and the heating means is arranged around the heating cylinder (1a). The induction heating coil (4) wound, or the heating cylinder (1a), the dielectric heating conductive member (3) attached so as to be in close contact with the outer peripheral wall, and the dielectric heating coil A bactericide spraying device including an induction heating coil (4) wound around a conductive member (3) is employed.

  As described in claim 2, in the disinfectant spray device according to claim 1, the disinfectant supply means may be a spray nozzle that sprays liquid disinfectant with pressurized air. .

  According to the present invention, the disinfectant supply means, the vaporizing chamber (1) for introducing the supplied disinfectant, and the heating to vaporize the supplied disinfectant above the boiling point in the vaporizing chamber (1). The vaporizing chamber (1) is formed by a heating cylinder (1a), and the heating means is wound around the heating cylinder (1a). An induction heating coil (4), or the heating cylinder (1a), a dielectric heating conductive member (3) attached in close contact with the outer peripheral wall thereof, and the dielectric heating conductive member (3 ) And the induction heating coil (4) wound around, the disinfectant such as hydrogen peroxide can be gasified more efficiently than the heating by a normal heater. Therefore, a higher temperature bactericidal gas or mist can be sprayed on the packaging material, and the bactericidal property can be further enhanced. Moreover, since it can heat efficiently with respect to power consumption, there is also an energy saving effect.

1 is a schematic vertical sectional view of a disinfectant spray device according to the present invention.

  The form for implementing this invention is demonstrated below.

  As shown in FIG. 1, this disinfectant spraying device includes a disinfectant supply means such as hydrogen peroxide, a vaporizing chamber 1 for introducing the supplied disinfectant, and the supplied disinfectant in the vaporizing chamber 1. Heating means for heating to a boiling point or higher and vaporizing.

  The means for supplying the sterilizing agent introduces a liquid sterilizing agent such as hydrogen peroxide into the vaporizing chamber 1 and may be a simple conduit. Preferably, the liquid sterilizing agent is supplied by pressurized air. A spray nozzle (not shown) such as a two-fluid nozzle for spraying is used.

  The vaporizing chamber 1 is formed by a heating cylinder 1a. The heating cylinder 1a is preferably formed of a metal cylinder such as stainless steel having corrosion resistance against the sterilizing agent. The heating cylinder 1a is desirably installed vertically, and a spray nozzle for spraying the sterilizing agent is attached to the upper end of the heating cylinder 1a. Moreover, the nozzle part 2 is attached to the lower end of the heating cylinder 1a. The nozzle part 2 is formed in a funnel shape, and a disinfectant gas or mist discharge port 2a is provided at its lower end. Further, the generated gas or mist may be transported by heated air and discharged from the nozzle.

  The heating means includes the heating cylinder 1a, the dielectric heating conductive member 3 attached so as to be in close contact with the outer peripheral wall thereof, and the induction heating coil 4 wound around the dielectric heating conductive member 3. It has.

  Since the heating cylinder 1a is a non-magnetic material if it is made of stainless steel, the frequency of the induced current described later must be increased. In order to omit the inverter for adjusting the frequency, it is necessary to provide the dielectric heating conductive member 3 which can be in close contact with the outer peripheral wall of the heating cylinder 1a made of a material such as iron having magnetism. If it is a magnetic body, it can heat up with a normal low frequency, alternating current power supply. When the dielectric heating conductive member 3 is in close contact with the outer peripheral wall of the heating cylinder 1a, the heat transfer rate when the heat generated in the induction heating conductive member 3 is transferred to the heating cylinder 1a is improved.

  The induction heating coil 4 is spirally wound around the cylindrical outer peripheral surface of the dielectric heating conductive member 3. In the illustrated example, it is wound in a single layer, but multiple windings are also possible. The starting end side and the terminating end side of the induction heating coil 4 are electrically connected to the AC power source 6 via the transformer 5.

  In addition, the said heating means shall comprise the heating cylinder 1a and the induction heating coil 4 wound around the heating cylinder 1a, when the heating cylinder 1a is comprised with a magnetic body. It can be omitted. In this case, the induction heating coil 4 is spirally wound around the cylindrical outer peripheral surface of the heating cylinder 1a.

  When an AC voltage from the AC power source 6 is applied to the induction heating coil 4, the induction heating coil 4 generates an alternating magnetic flux, an induction current flows through the dielectric heating conductive member 3, and the dielectric heating conductive member 3 generates heat. To do. As a result of heat transfer from the dielectric heating conductive member 3 to the heating cylinder 1a, the heating cylinder 1a is heated.

  When the dielectric heating conductive member 3 is omitted, an induction current flows through the heating cylinder 1a itself, and the heating cylinder 1a is heated.

  It is also possible to use the transformer 5 as an inverter, and use this inverter to convert the frequency of the AC voltage from the AC power source 6 to energize the induction heating coil 4. In the case where a heating cylinder made of a non-magnetic material such as stainless steel is employed, the dielectric heating conductive member 3 is omitted, and an inverter is employed as the transformer 5 when the heating cylinder is directly heated.

  The dielectric heating conductive member 3 and the induction heating coil 4 are covered and protected by a cover 7.

  A nonconductive member made of an inorganic material may be provided between the dielectric heating conductive member 3 and the induction heating coil 4. The heat conduction from the dielectric heating conductive member 3 to the induction coil 4 is suppressed by the interposition of the nonconductive member.

  Although not shown, a temperature sensor is attached to the heating cylinder 1a or the dielectric heating conductive member 3. Temperature information from the temperature sensor is sent to the transformer 5, and the transformer 5 is controlled based on the temperature information, whereby the temperature of the heating cylinder 1a is controlled.

  Next, the operation of the bactericide spraying device having the above configuration will be described.

  When an AC voltage from the AC power source 6 is applied to the induction heating coil 4, the induction heating coil 4 generates an alternating magnetic flux, an induction current flows through the dielectric heating conductive member 3, and the dielectric heating conductive member 3 generates heat. . The heat of the dielectric heating conductive member 3 is transmitted to the heating cylinder 1a, and the heating cylinder 1a is heated. The temperature of the heating cylinder 1a is controlled by the temperature sensor, the transformer 5, etc., and is maintained at a desired value.

  When the heating cylinder 1a is heated to a desired temperature, a liquid sterilizing agent such as hydrogen peroxide is sprayed into the vaporizing chamber 1 of the heating cylinder 1a by a spray nozzle that is a means for supplying the sterilizing agent.

  The disinfectant spray is vaporized in the vaporizing chamber 1 of the heating cylinder 1a, and this gas G is discharged from the discharge port 2a of the nozzle portion 2 to the outside of the heating cylinder 1a.

  The disinfectant gas G discharged to the outside of the heating cylinder 1a remains as a gas or is misted and sprayed onto a PET (polyethylene terephthalate) bottle, a resin film, a preform before bottle molding, etc., which are to be sterilized. . When the gas G of the sterilizing agent comes into contact with the surface of the bottle or the like, it becomes fine droplets and condenses and condenses as a high concentration sterilizing agent, and sterilizes the surface of the bottle or the like appropriately and quickly.

  An iron material having a thickness of 10 mm was wound from the outside around a cylindrical portion of a heating cylinder made of SUS304 having an inner diameter of 85 mm, an outer diameter of 90 mm, and a length of 400 mm, and a nozzle having a length of 60 mm and an inner diameter of 6 mm. A sheet of 6 mm thick made of alumina silica fiber was wound around the outside, and an induction coil was wound to a capacity of 6.0 kw. To this, 250 mL / min of hydrogen peroxide (concentration 35%) was sprayed into the two-fluid spray attached to the upper part of the heating cylinder with 0.5 MPa air. At this time, the temperature of the heating cylinder was set to 300 ° C. The gas temperature discharged from the nozzle tip was 270 ° C.

  For comparison, a 6.0 kW band heater is wound around the same heating cylinder, set to 300 ° C., and 60 mL / min of hydrogen peroxide (concentrated 35%) is sprayed into the heating cylinder with 0.5 MPa air. did. The mist discharged from the nozzle tip was 95 ° C.

  It was found that by converting the hydrogen peroxide water into gas or mist by the disinfectant spray device of the present invention, both the flow rate and temperature can be increased, energy saving is possible, and the bactericidal effect can be surely performed. .

DESCRIPTION OF SYMBOLS 1 ... Vaporization chamber 1a ... Heating cylinder 3 ... Conductive member for dielectric heating 4 ... Induction heating coil

Claims (2)

  In a sterilizing agent spraying apparatus comprising a sterilizing agent supply means, a vaporizing chamber for introducing the supplied sterilizing agent, and a heating means for heating and evaporating the supplied sterilizing agent to a boiling point or higher in the vaporizing chamber, The vaporizing chamber is formed of a heating cylinder, and the heating means includes the heating cylinder and an induction heating coil wound around the heating cylinder, or is in close contact with the heating cylinder and an outer peripheral wall thereof. A disinfectant spraying apparatus comprising: a conductive member for dielectric heating attached to a coil; and an induction heating coil wound around the conductive member for dielectric heating.   2. The disinfectant spraying apparatus according to claim 1, wherein the disinfectant supplying means is a spray nozzle for spraying a liquid disinfectant with pressurized air.

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