CN104977462B - A kind of apparatus and method of culinary art object power consumption in calculating cooking apparatus - Google Patents

Abstract

The present invention relates to the technical field of calculating the power consumption of a cooking object in a cooking appliance, and discloses a device and method for calculating the power consumption of a cooking object in a cooking appliance. Timing; one or more memories, correspondingly storing the power consumption value of one or more power devices for cooking objects; the processor, calculating the no-load power consumption of the one or more power devices in the latest unit time value and the actual power consumption value, and add the difference to the previously stored power consumption values for cooking objects in one or more memories; the processor uses the accumulated power consumption values for cooking objects to calculate the power consumption of cooking objects. Through the technical solution provided by the invention, the power consumption of the cooking object can be obtained, so that it is possible to know how much energy is used on food in one cooking, so as to guide the user for the next cooking.

Description

A device and method for calculating power consumption of a cooking object in a cooking appliance

technical field

The present invention relates to a technique for calculating power consumption of a cooking object in a cooking appliance, in particular, to a device and method for calculating the power consumption of a cooking object in a cooking appliance.

Background technique

With the continuous popularization of electrical equipment in the kitchen, the original gas and coal-fired equipment has been gradually replaced and eliminated. However, because the power consumption of electrical equipment is invisible, people begin to worry about whether cooking appliances consume too much electricity , Whether the monthly electricity bill exceeds the personal budget. At present, the rated power of most household cooking appliances is above kilowatts, and the power consumption of this kind of equipment will exceed 1 degree in less than an hour. For ordinary families, if such appliances are not used carefully, a The power consumption may exceed 100 kWh in a month, and the burden of electricity bills is not light.

The cooking utensil itself has a certain amount of energy consumption, that is to say, not all the energy is applied to the food being cooked, so it is impossible to guide the next cooking according to the power consumption of the cooking object. At present, the user can only judge whether the cooking is good or not by the length of the cooking appliance's running time and the cooking effect of the cooking object (for example, cooking food). The amount of information is too small to guide the next cooking.

Contents of the invention

The object of the present invention is to provide a device and method for calculating power consumption of cooking objects in a cooking appliance, which are used to solve the problem of calculating power consumption of cooking objects.

In order to achieve the above object, the present invention provides a device for calculating the power consumption of a cooking object in a cooking appliance, the cooking appliance includes one or more power devices, and the device includes: a timer for During the running process, the cycle counts the unit time; one or more memory stores respectively store the power consumption value of the cooking object for the one or more power devices; the processor, every time the timer counts When the unit time is reached, calculate the no-load power consumption value, the actual power consumption value, and the difference between the no-load power consumption value and the actual power consumption value of the one or more power devices in the latest unit time, and respectively accumulating the difference to the power consumption value for the cooking object previously stored in the one or more memories corresponding to the one or more power devices; wherein the processor according to the one or more memories The power consumption of the cooking object is calculated by using the accumulated power consumption value for the cooking object stored in the cooking object.

Correspondingly, the present invention also provides a method for calculating the power consumption of a cooking object in a cooking appliance, where the cooking appliance includes one or more power devices, the method includes: cycling power to Timing per unit time; when the timed time reaches the unit time, calculate the no-load power consumption value, actual power consumption value and no-load power consumption value of the one or more power devices in the latest unit time value and the actual power consumption value, and add the difference to the previously stored power consumption value for the cooking object of the one or more power devices; and according to the power consumption value of the one or more power devices The accumulated power consumption value for the cooking object is used to calculate the power consumption of the cooking object.

Through the above technical solution, the present invention calculates the no-load power consumption value and the actual power consumption value of the power device per unit time and calculates the power consumption value of the power device used for the cooking object per unit time, thereby obtaining the power consumption value of the cooking object. Electricity, you can know how much energy is used on the food in one cooking, so as to guide the user for the next cooking. The implementation of the present invention does not need to add any additional devices, and the implementation cost is low and the application range is wide.

Other features and advantages of the present invention will be described in detail in the detailed description that follows.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the description, together with the following specific embodiments, are used to explain the present invention, but do not constitute a limitation to the present invention. In the attached picture:

Fig. 1 is a block diagram of a device for calculating the power consumption of a cooking object in a cooking appliance provided by the present invention;

Fig. 2 is a flow chart of a method for calculating power consumption of a cooking object provided by the present invention;

Fig. 3 is the temperature change curve in the cooking utensil provided by the present invention; And

Fig. 4 is a flowchart of a method for calculating power consumption of a cooking object in a cooking appliance provided by the present invention.

Detailed ways

Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

Fig. 1 is a block diagram of a device for calculating the power consumption of a cooking object in a cooking appliance provided by the present invention. The cooking appliance includes one or more power devices. As shown in Fig. 1, the device includes a timer, one or more memories, processor. The timer is used to cycle time the unit time during the operation of the cooking appliance; one or more memories respectively store the power consumption value of one or more power devices for the cooking object; When the unit time is reached, calculate the no-load power consumption value, actual power consumption value, and the difference between the no-load power consumption value and the actual power consumption value of one or more power devices in the latest unit time, and calculate the difference The power consumption values for the cooking object stored in one or more memories corresponding to the one or more power devices are respectively accumulated; to calculate the power consumption of cooking objects.

"No-load power consumption value" refers to the power consumption value when no cooking food is placed in the cooking appliance; "actual power consumption value" refers to the power consumption value when cooking food is placed in the cooking appliance; "Power consumption value used for cooking objects" refers to the power consumption value used to cook food placed in the cooking appliance; "power consumption value of cooking objects" refers to the power consumption value of all power devices used The sum of power consumption, that is, the power used for food in a cooking process. It should be clear that the "no-load power consumption value", "actual power consumption value" and "power consumption value for cooking objects" here are all for the power consumption of one power device in one or more power devices. Specifically, the "power consumption of cooking objects" refers to all power devices in one or more power devices.

A cooking appliance may include one or more power devices. For example, a microwave oven may include a heat pipe, a steam generator, a power fan motor, etc., and these power devices need to consume electric energy. In this paper, one memory is correspondingly set for each power device, thus, one or more power devices need to be correspondingly set with one or more memory.

The unit time can generally be 1 second, but can be changed according to the size of the memory used. For example, it can be 10 seconds, 1 minute, etc. Generally speaking, the smaller the memory, the longer the unit time can be. The present invention uses 1 second Take this as an example.

The above technical solution is further described below in conjunction with Fig. 2. Fig. 2 is a flow chart of a method for calculating the power consumption of a cooking object provided by the present invention. In Fig. 2:

In step 201, the cooking appliance starts to work. Generally, the cooking appliance is started by the user, and works according to the time or temperature set by the user, and stops working when the set time or temperature is reached.

Step 202, the timer starts counting, the timer here is a timer for timing the unit time (1 second), when the timer counting time reaches the unit time, continue to start timing the next unit time, That is, the cycle counts the unit time.

Step 203, judging whether the counting time has reached the unit time, and if so, executing step 204, otherwise continuing to count. That is, step 204 is executed every time the counted time reaches the unit time.

Step 204, calculating the difference between the no-load power consumption value and the actual power consumption value of one or more power devices in the latest unit time. The latest unit time here refers to the unit time just ended, and the difference between the no-load power consumption value and the actual power consumption value is the power consumption value used for cooking objects in the latest unit time. In this step 204, to calculate the difference between the no-load power consumption value and the actual power consumption value, the no-load power consumption value and the actual power consumption value must first be obtained, so in this step 204, it also includes calculating the latest The process of the no-load power consumption value and the actual power consumption value of one or more power devices per unit time.

Step 205, adding the difference between the no-load power consumption value calculated in step 204 and the actual power consumption value to the previously stored power consumption value for the cooking object in one or more memories corresponding to one or more power devices . It should be clear through this step that the technical solution provided by the present invention is to calculate the no-load power consumption value, the actual power consumption value, and the difference between the no-load power consumption value and the actual power consumption value for each unit time and calculate The difference between the no-load power consumption value and the actual power consumption value per unit time in the elapsed time is accumulated. In step 205, the no-load power consumption value and the actual power consumption value are not accumulated because the purpose of the technical solution provided by the present invention is to calculate the power consumption of the cooking object, and the calculation of the power consumption of the cooking object requires The parameter is the accumulated power consumption value for the cooking object, so the storage and accumulation of the actual power consumption value is ignored here. Of course, those skilled in the art can accumulate the no-load power consumption value and the actual power consumption value of each unit time in the elapsed time according to actual needs. Moreover, one power device corresponds to one memory, so one memory corresponds to storing data of one power device, including the no-load power consumption value, the actual power consumption value, and the difference between the no-load power consumption value and the actual power consumption value.

Step 206, judge whether a query instruction is received, and execute step 208 if the query instruction is received, otherwise execute step 207, the query instruction can be sent through the user terminal when the user needs to know the current power consumption of the cooking object, for example.

Step 207, judge whether the cooking utensil stops working, and execute step 208 if it stops working, otherwise return to step 202 to continue counting the unit time.

Step 208, calculating the power consumption of the cooking object according to the accumulated power consumption values for the cooking object stored in one or more memories. As shown in FIG. 2 , step 208 may be performed when it is determined in step 207 that the cooking appliance stops working (that is, the cooking appliance has finished running), or it may be performed when it is determined in step 206 that a query instruction is received. The calculated power consumption of the cooking object can be displayed on the display panel of the cooking appliance, and can also be sent to the user terminal to inform the user.

Those skilled in the art should understand that the timing for calculating the power consumption of the cooking object can be set according to the actual situation, for example, it can only be sent through the user terminal when the query instruction is received (when the user wants to know the current energy efficiency level) Inquiry instruction), it can also be calculated only when the cooking appliance stops working, and of course, the calculation can also be performed when the query instruction is received and the cooking appliance stops working.

In step 208 of FIG. 2 , the specific steps of calculating the power consumption of the cooking object according to the accumulated power consumption value for the cooking object stored in one or more memories are as follows: The power consumption values are summed to obtain the power consumption of the cooking object.

It should be clear that the sum of the accumulated power consumption values for the cooking object stored in one or more memories to obtain the power consumption of the cooking object refers to the accumulated power consumption values stored in all the memories of the one or more memories The power consumption values for the cooking object are summed to obtain the power consumption of the cooking object, that is, the sum of the power consumption values for the cooking object consumed by all power devices. Of course, in actual operation, calculation and subsequent processing may also be performed only on the no-load power consumption value and the actual power consumption value consumed by the main power devices of the cooking appliance.

In the case that the unit time is selected as 1 second, the unit of the power consumption value of the power device used for the cooking object can be 10 watts per second, then the calculation formula of the no-load power consumption of the cooking appliance is as follows:

In formula (1), the reason why 0.01 kWh and 10 watts are selected as the unit is because the power calculated by the above method is often ranging from tens to hundreds of watts. If the unit is too large If the value is too large, it is easy to cause the calculation result to deviate too much from the actual one. If the unit is too small, there is usually an error in the power device (for example, a heater), and it is meaningless to use a unit that is too small for calculation.

The device for calculating the power consumption of cooking objects in cooking utensils provided by the present invention also includes a temperature setting device, which is used to set the target heating temperature, and the processor obtains one or more heating values in the current unit time according to the target heating temperature The no-load on-off ratio of multiple power devices, and calculate the no-load power consumption value of one or more power devices corresponding to the current unit time according to the no-load on-off ratio.

"On-off ratio of a power device" refers to the ratio of the on-time to off-time of a power device, and "No-load on-off ratio of a power device" refers to the power device when no cooking food is placed in the cooking appliance The on-off ratio of the power device, hereinafter "the actual on-off ratio of the power device" refers to the on-off ratio of the power device when cooking food is placed in the cooking appliance.

Since the power of the power device is fixed, the power consumption value of the power device in the unit time is also fixed, and the unit can be easily calculated when the no-load on-off ratio in the unit time is known. The power consumption value of the power device within the time.

The processor obtains the no-load on-off ratio of one or more power devices in the current unit time according to the set temperature, including: calculating the no-load cavity temperature in the current unit time according to the target heating temperature; The no-load on-off ratio of one or more power devices corresponding to the no-load cavity temperature is obtained; the correspondence between the no-load cavity temperature and the no-load on-off ratio of one or more power devices Relationships are pre-stored.

For a power device, there is a one-to-one correspondence between the no-load cavity temperature and the no-load on-off ratio, and this correspondence can be stored in advance, so the pre-stored no-load cavity temperature and The no-load on-off ratio is obtained according to the no-load on-off ratio according to the no-load cavity temperature. However, since cooking food is placed in the cooking utensil during the cooking process, the temperature of the no-load cavity needs to be calculated. The following formula can be used to calculate the temperature of the no-load cavity within the current unit of time based on the target heating temperature:

T=k ₁ ×k ₂ ×t+(1-k ₁ )×T ₀ (2)

In formula (2), T is the no-load cavity temperature, T ₀ is the target heating temperature, k ₁ is the stage coefficient, k ₂ is the temperature time coefficient, and t is the running time of the cooking utensil; In the rising stage, k ₁ is 1, when the temperature of the empty cavity reaches the target heating temperature, k ₁ is 0, and k ₂ is a constant. Wherein, _k2 can be a fixed value, or a value that decreases with time to make the calculation result more in line with the actual situation. The specific value of _k2 can be determined by those skilled in the art according to the actual situation.

Taking the power device as the heater as an example, assuming that the cooking appliance is running with a food load, and the temperature of the cavity continues to rise, when it runs to the 180th second, according to formula (2), calculate if it is no-load The no-load cavity temperature is 150°C. Correspondingly, the processor obtains the heater at this temperature point (150°C) according to the corresponding relationship between the no-load cavity temperature and the no-load on-off ratio (if it is a 1200-watt generator The no-load on-off condition of the heat pipe) is 16 seconds on and 8 seconds off (the on-off ratio is 2:1), then the converted power consumption value under this unit time (unit time is 1 second) is 800 watts per second .

The calculation method of the actual power consumption value per unit time is described below, and the present invention provides two calculation methods.

In the first method for calculating the actual power consumption value per unit time, the device for calculating the cooking object in the cooking appliance provided by the present invention further includes a temperature detection device, which is used for each unit time of the cycle. The temperature in the cavity of the cooking utensil is detected; the processor obtains the actual on-off ratio of one or more power devices in the current unit time according to the detected temperature in the current unit time, and calculates the actual on-off ratio according to the actual on-off ratio. The corresponding actual power consumption value of one or more power devices in the current unit time; wherein, the corresponding relationship between the detected temperature in the current unit time and the actual on-off ratio of the one or more power devices is stored in advance.

"Target heating temperature" is the final temperature to be reached by the cooking utensil. However, due to the different positions of the temperature detection devices installed in the cooking utensil, the detected temperature is also different. Therefore, the set temperature can be adjusted in actual operation. The target heating temperature is adjusted accordingly according to the different positions of the temperature detection device, however, this is only for realizing the technical solution of the present invention more accurately. The "target heating temperature" in the present invention may be a set value or a value after adjustment.

It should be noted that the correspondence between the no-load cavity temperature described above and the no-load on-off ratio of one or more power devices and the detected current unit time temperature and one or more power devices The corresponding relationship between the actual on-off ratio can be stored separately, or it can be the same corresponding relationship, because the no-load cavity temperature and the detected temperature per unit time are both temperature values, and the no-load on-off ratio and The actual on-off ratios are all on-off ratios. Therefore, their corresponding relationship actually reflects the corresponding relationship between temperature and on-off ratio, so they can be represented in a memory.

Fig. 3 is the temperature variation curve in the cooking utensil provided by the present invention, in Fig. 3, abscissa t is time, and ordinate T is temperature, and curve 301 is the temperature variation curve that does not place cooking food in the cooking utensil, and curve 302 is A temperature profile for cooking food is placed in the cooking appliance. Since the temperature detected by the temperature detection device in the cavity at the same time point (180 seconds) is lower than that at no-load when the cooking food is placed in the cooking utensil, the corresponding actual on-off ratio obtained at the same time point The no-load on-off ratio is longer, so the power consumption of the converted power device is higher than that of no-load. At this time, we subtract the power consumption value converted at this time from the power consumption value at no-load at the corresponding time point, and then we can obtain the power consumption value consumed in the food load per unit time.

As far as the above-mentioned example is concerned, if the temperature detected by the temperature detection device at this time (180th second) is 140°C, the processor will communicate with one or more power devices according to the detected temperature per unit time and the actual communication with one or more power devices. The corresponding relationship between the on-off ratio and the actual on-off situation corresponding to the temperature point is 18 seconds on and 6 seconds off (the on-off ratio is 3:1), then the converted unit time (the unit time is 1 second) is as follows The power consumption is 900 watts per second. That is to say, in the 180th second, the power consumption value for cooking the object is 100 W·s (900 W·s−800 W·s).

In the second method for calculating the actual power consumption value of a unit time, the processor calculates the actual power consumption value of one or more power devices in the latest unit time including: setting one or more power devices in the on state The actual power consumption value of one or more power devices is set to a fixed value; the actual power consumption value of one or more power devices that are not turned on among the one or more power devices is set to zero.

In each unit time (for example, 1 second), the processor detects and judges whether each power device is energized. For a power device, if the power device is energized (that is, running), the power device will The actual power consumption value within is a fixed value (1200 W·s in the example mentioned above), if the power device is powered off (that is, not running), the actual power consumption of the power device in the unit time The value is zero (0 W·s). Those skilled in the art should understand that whether the power device is energized or de-energized can be determined by controlling a control signal of a switching device (such as a relay, a triode, etc.) of the power device.

Those skilled in the art should understand that when using the second method to calculate the actual power consumption value, it should be noted that the actual power consumption value minus the no-load power consumption value is used to obtain the power consumption value for the cooking object, which is easy to understand. If the actual power consumption value is zero in a unit time, the power consumption value used for the cooking object in the unit time is a negative value.

We can understand the idea of the present invention according to the calculation formula Q=Cm△T of the heat obtained by the substance: under no-load conditions, since the cooking utensils and the environment remain basically stable, under normal no-load operation, the cooking utensils A rise in chamber temperature will necessarily follow a similar temperature rise curve. When the cooking food is put into the cooking cavity, the food will consume part of the heat during the heating process, resulting in the whole cooking process, the temperature detected by the temperature detection device placed in the cavity of the cooking utensil is higher than that of the no-load condition. to be low. At this time, since the temperature signal fed back is low, the processor will increase the on-off ratio of the main power devices such as the heater in an attempt to bring the temperature of the cooking cavity back to the same target temperature as that under no-load conditions. Of course, with this control mode under load, it is unlikely that the temperature of the cooking cavity will return to the temperature at no load, because then the on-off ratio of the heater will be the same as at no load, obviously Unable to support additional food heating, the temperature of the cavity will inevitably drop again, unless the food itself as an additional load no longer absorbs heat (theoretically, this is only possible when the food is completely carbonized, but in practice, in The detection error of the sensor itself, after a long enough running time, the end of the load temperature rise curve (curve 302 in FIG. 3 ) may coincide with the end of the no-load temperature rise curve (curve 301 in FIG. 3 ).

The memory above is at least double-byte (16bit, the maximum value that can be stored is 65,000) or even four-byte (32bit, the maximum value that can be stored is 4.3 billion), so as to provide sufficient capacity To record the next accumulative value of power consumption.

Fig. 4 is a flowchart of a method for calculating the power consumption of a cooking object in a cooking appliance provided by the present invention, the cooking appliance includes one or more power devices, as shown in Fig. 4 , the method includes: during the operation of the cooking appliance Time the unit time in a loop; when the timed time reaches the unit time, calculate the no-load power consumption value, actual power consumption value and no-load power consumption value of one or more power devices in the latest unit time value and the actual power consumption value, and add the difference to the previously stored power consumption value for cooking objects of one or more power devices; according to the accumulated no-load of one or more power devices The power consumption value of the cooking object and the power consumption value for the cooking object are used to calculate the power consumption of the cooking object.

It should be noted that the specific details and benefits of the method for calculating the power consumption of a cooking object in a cooking appliance provided by the present invention are similar to the device for calculating the power consumption of a cooking object in a cooking appliance provided by the present invention, and will not be repeated here. .

The preferred embodiment of the present invention has been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the specific details of the above embodiment, within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, These simple modifications all belong to the protection scope of the present invention.

Through the technical solution provided by the present invention, the following beneficial effects can be obtained: 1. The user can know how much energy is used on the food in one cooking, which is helpful for the user to improve his cooking skills. The thinner it is, the thicker it is, the more difficult it is to cook without treatment. At this time, through the present invention, when we know that the energy consumed by slicing and not slicing will be quite different for the same amount of food, we will consider slicing the food later to reduce cooking heating 2. The technical solution provided by the present invention can be used in smart home appliances to remind users how much electricity most people consume on the corresponding recipes through big data, or how to do it to consume less electricity , so that users can better experience green life.

In addition, it should be noted that the various specific technical features described in the above specific implementation manners may be combined in any suitable manner if there is no contradiction. In order to avoid unnecessary repetition, various possible combinations are not further described in the present invention.

In addition, various combinations of different embodiments of the present invention can also be combined arbitrarily, as long as they do not violate the idea of the present invention, they should also be regarded as the disclosed content of the present invention.

Claims (14)

1. A device for calculating the power consumption of a cooking object in a cooking appliance, the cooking appliance comprising one or more power devices, characterized in that the device includes: a timer, used to cycle time the unit time during the operation of the cooking appliance; One or more memory stores correspondingly store the power consumption values of the one or more power devices for cooking objects; The processor calculates the no-load power consumption value, the actual power consumption value and the no-load power consumption value of the one or more power devices in the latest unit time when the counting time of the timer reaches the unit time. The difference between the power value and the actual power consumption value, and the difference is respectively added to the power consumption value for the cooking object stored in the one or more memories corresponding to the one or more power devices; Wherein, the processor calculates the power consumption of the cooking object according to the accumulated power consumption values for the cooking object stored in the one or more memories. 2. The device according to claim 1, wherein the processor sums the accumulated power consumption values stored in the one or more memories to obtain the power consumption of the cooking object. 3. The device according to claim 1, further comprising: A temperature detection device, used to detect the temperature in the cavity of the cooking appliance at each unit time of the cycle; The processor obtains the actual on-off ratio of the one or more power devices in the current unit time according to the detected temperature in the current unit time, and calculates the corresponding on-off ratio in the current unit time according to the actual on-off ratio The actual power consumption value of the one or more power devices; Wherein, the corresponding relationship between the detected temperature per unit time and the actual on-off ratio of the one or more power devices is stored in advance. 4. The device according to claim 1, wherein the calculation by the processor of the actual power consumption value of the one or more power devices in the latest unit time comprises: Setting the actual power consumption value of one or more power devices in the on state among the one or more power devices as a fixed value; and Set the actual power consumption value of one or more power devices that are not turned on among the one or more power devices to zero. 5. The device according to claim 1, further comprising: A temperature setting device for setting the target heating temperature; The processor obtains the no-load on-off ratio of the one or more power devices in the current unit time according to the target heating temperature, and calculates the corresponding on-off ratio in the current unit time according to the no-load on-off ratio The no-load power consumption value of one or more power devices. 6. The device according to claim 5, wherein the no-load on-off ratio of the one or more power devices obtained by the processor according to the set temperature in the current unit time comprises: Calculate and obtain the no-load cavity temperature per unit time according to the target heating temperature; and Obtaining the no-load on-off ratio of one or more power devices corresponding to the no-load cavity temperature according to the no-load cavity temperature in the current unit time; Wherein the corresponding relationship between the no-load cavity temperature and the no-load on-off ratio of the one or more power devices is stored in advance. 7. The device according to claim 6, characterized in that the temperature of the no-load cavity in the current unit time is calculated according to the target heating temperature by the following formula: T=k ₁ ×k ₂ ×t+(1-k ₁ )×T ₀ Wherein, T is the temperature of the empty cavity, T ₀ is the target heating temperature, k ₁ is the stage coefficient, k ₂ is the temperature time coefficient, and t is the running time of the cooking utensil; In the rising stage of the body temperature, k ₁ is 1, and when the temperature of the empty cavity body reaches the target heating temperature, k ₁ is 0; k ₂ is a constant. 8. A method for calculating the power consumption of a cooking object in a cooking appliance, the cooking appliance comprising one or more power devices, characterized in that the method comprises: cyclically timing the unit time during the operation of the cooking appliance; When the counted time reaches the unit time, calculate the no-load power consumption value, the actual power consumption value, the no-load power consumption value and the actual power consumption value of the one or more power devices in the latest unit time and adding the difference to the previously stored power consumption values for the cooking object of the one or more power devices; and The power consumption of the cooking object is calculated according to the accumulated power consumption value of the one or more power devices for the cooking object. 9. The method according to claim 8, wherein the calculating the power consumption of the cooking object according to the accumulated power consumption value of the one or more power devices for the cooking object comprises: The accumulated power consumption values for the cooking object of the one or more power devices are summed to obtain the power consumption of the cooking object. 10. The method according to claim 8, wherein calculating the actual power consumption value of the one or more power devices in the latest unit time comprises: detecting the temperature in the cavity of the cooking appliance at each unit time of the cycle; The actual on-off ratio of the one or more power devices in the current unit time is obtained according to the detected temperature in the current unit time, and the corresponding one or more power devices in the current unit time are calculated according to the actual on-off ratio. The actual power consumption value of multiple power devices; Wherein, the corresponding relationship between the detected temperature per unit time and the actual on-off ratio of the one or more power devices is stored in advance. 11. The method according to claim 8, wherein calculating the actual power consumption value of the one or more power devices in the latest unit time comprises: Setting the actual power consumption value of one or more power devices in the on state among the one or more power devices as a fixed value; and Set the actual power consumption value of one or more power devices that are not turned on among the one or more power devices to zero. 12. The method according to claim 8, wherein calculating the no-load power consumption value of the one or more power devices in the latest unit time comprises: Obtain the no-load on-off ratio of the one or more power devices in the current unit time according to the set target heating temperature; The no-load power consumption value of the one or more power devices corresponding to the current unit time is calculated according to the no-load on-off ratio. 13. The method according to claim 12, wherein obtaining the no-load on-off ratio of the one or more power devices in the current unit time according to the set target heating temperature comprises: Calculate and obtain the no-load cavity temperature per unit time according to the target heating temperature; and Obtaining the no-load on-off ratio of one or more power devices corresponding to the no-load cavity temperature according to the no-load cavity temperature in the current unit time; Wherein the corresponding relationship between the no-load cavity temperature and the no-load on-off ratio of the one or more power devices is stored in advance. 14. The method according to claim 13, characterized in that the temperature of the no-load cavity in the current unit time is calculated according to the target heating temperature by the following formula: T=k ₁ ×k ₂ ×t+(1-k ₁ )×T ₀ Wherein, T is the temperature of the empty cavity, T ₀ is the target heating temperature, k ₁ is the stage coefficient, k ₂ is the temperature time coefficient, and t is the running time of the cooking utensil; In the rising stage of the body temperature, k ₁ is 1, and when the temperature of the empty cavity body reaches the target heating temperature, k ₁ is 0; k ₂ is a constant.