Thermal Insulation Pad for Takeout Food and Control and Regulation Method

Abstract

The present invention discloses a special heat preservation pad for takeout food and a control and adjustment method. The special heat preservation pad for takeout food includes a plurality of heat preservation devices and a plurality of connection structures for respectively connecting the heat preservation devices. Each of the connection structures includes a main body portion and engaging portions provided at both ends of the main body portion. Among them, each of the heat preservation devices includes a bottom plate and a heat preservation portion. A cooperation portion for engaging and cooperating with the engaging portion is provided on the side of the bottom plate. The heat preservation portion is detachably arranged on the bottom plate and is used for heat preservation of takeout food. In this way, the connection structures are used to connect and combine a plurality of the heat preservation pads to form the special heat preservation pads for takeout food of different sizes, solving the problem of how to adapt to distribution boxes of different specifications and sizes.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal insulation equipment, and particularly to a special thermal insulation pad for takeaway food and a control and adjustment method thereof. Background Art

[0002] With the acceleration of the pace of life, takeaway delivery has now become an important part of people's daily life. Although takeaway delivery facilitates people's lives, there are often the following problems in takeaway delivery. When the temperature is relatively low in autumn and winter and the delivery time is too long due to a long distance, the temperature of the takeaway food in the delivery box will continuously decrease, affecting the dining experience of customers.

[0003] Currently, usually only a thermal insulation pad is placed at the bottom of the delivery box, and heat is released through the heat generation of the thermal insulation pad to keep the food in the box warm. However, the size of the thermal insulation pad is fixed after production. When it is applied to delivery boxes of different specifications, it is necessary to re-open the mold for production according to the requirements, increasing the production cost. Summary of the Invention

[0004] The main object of the present invention is to propose a special thermal insulation pad for takeaway food and a control and adjustment method thereof, aiming to solve the problem that the existing special thermal insulation pad for takeaway food is difficult to adapt to delivery boxes of different specifications.

[0005] To achieve the above object, the present invention proposes a special thermal insulation pad for takeaway food, wherein the special thermal insulation pad for takeaway food includes a plurality of thermal insulation devices and a plurality of connection structures for respectively connecting the thermal insulation devices. Each of the connection structures includes a main body portion and engaging portions provided at both ends of the main body portion. Among them, each of the thermal insulation devices includes:

[0006] A bottom plate, on the side of which there is a mating portion for snap-fitting with the engaging portion; and,

[0007] A thermal insulation portion, detachably provided on the bottom plate, for insulating takeaway food.

[0008] Optionally, elastic buckles are movably provided at both ends of each main body portion along the axial direction of the main body portion, and a circumferentially extending annular groove is provided on the side of each bottom plate. The elastic buckles are snap-fitted with the annular groove;

[0009] The mating portion includes the annular groove;

[0010] The engaging portion includes the elastic buckles.

[0011] Optionally, the main body portion includes a telescopic rod.

[0012] Optionally, at least part of the heat insulation part includes an energy storage part, and each energy storage part includes an energy storage layer close to the bottom plate and a heat conduction layer far from the bottom plate, and each energy storage layer and each heat conduction layer are arranged at intervals.

[0013] Optionally, a first elastic member is arranged between each energy storage layer and each heat conduction layer.

[0014] Optionally, at least part of the heat insulation part includes a heating part, and each heating part includes an electric heater and an elastic sealing cover covering the electric heater.

[0015] Optionally, a second elastic member is arranged between each electric heater and each elastic sealing cover.

[0016] Optionally, a displacement sensor is arranged on each elastic sealing cover.

[0017] Optionally, a controller is further included, and the controller is electrically connected to the electric heater and the displacement sensor.

[0018] Optionally, a heat insulation substrate is further included, and a plurality of the heat insulation devices are arranged on the heat insulation substrate.

[0019] The present invention further provides a control and adjustment method for a special heat preservation pad for takeaway food. At least part of the heat insulation part includes a heating part, and each heating part includes an electric heater and an elastic sealing cover covering the electric heater, and a displacement sensor is arranged on each elastic sealing cover;

[0020] The control and adjustment method for the special heat preservation pad for takeaway food includes the following steps:

[0021] Obtain the number value of the displacements generated in a plurality of the elastic sealing covers;

[0022] Determine the power adjustment strategy of each electric heater according to the number value;

[0023] Adjust the power of each electric heater according to the power adjustment strategy of the electric heater.

[0024] Optionally, the determining the power adjustment strategy of the electric heater according to the number value includes:

[0025] When the number value is greater than a preset value, control the power of all the electric heaters to be adjusted to the rated power;

[0026] When the number value is less than the preset value, determine the target position of the elastic sealing cover generating the displacement, and control the power of each electric heater within the target position to be adjusted to the rated power.

[0027] Optionally, a temperature sensor is arranged on each elastic sealing cover;

[0028] After determining the target position of the elastic sealing cover that generates displacement and controlling the power of each of the electric heaters within the target position to be adjusted to the rated power, it includes:

[0029] Obtain the temperature values of each of the elastic gaskets within the target position;

[0030] When the temperature value is greater than the preset temperature value, control the power of each of the electric heaters within the target position to be adjusted to the preset power, where the preset power is less than the rated power.

[0031] In the technical solution provided by the present invention, the engaging portions provided at both ends of the main body portion in each of the connecting structures can be engaged and cooperated with the cooperating portions on the bottom plate. In this way, according to the requirements of the size of the delivery box, a plurality of the heat preservation pads can be connected and combined through the connecting structures to form the special heat preservation pads for takeaway food of different sizes, meeting the requirements, and there is no need to re-open the mold to produce heat preservation pads of different sizes, greatly reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0033] Figure 1 It is a three-dimensional schematic diagram of an embodiment of the special heat preservation pad for takeaway food provided by the present invention;

[0034] Figure 2 For Figure 1 a three-dimensional schematic diagram of the connecting structure in;

[0035] Figure 3 For Figure 1 a three-dimensional schematic diagram of the energy storage portion in;

[0036] Figure 4 For Figure 1 a three-dimensional schematic diagram of the heating portion in;

[0037] Figure 5 It is a flow schematic diagram of the first embodiment of the control and adjustment method of the special heat preservation pad for takeaway food provided by the present invention;

[0038] Figure 6 It is a flow schematic diagram of the second embodiment of the control and adjustment method of the special heat preservation pad for takeaway food provided by the present invention;

[0039] Figure 7 It is a schematic flowchart of the third embodiment of the control and adjustment method for the special heat preservation mat for takeaway food provided by the present invention.

[0040] Explanation of the reference numerals in the drawings:

[0041]

[0042]

[0043] The realization of the object of the present invention, functional characteristics and advantages will be further described in conjunction with the embodiments with reference to the accompanying drawings. Specific embodiments

[0044] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0045] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0046] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc., are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0047] With the acceleration of the pace of life, food delivery has now become an important part of people's daily lives. Although food delivery facilitates people's lives, there are often the following problems in food delivery. When the temperature is relatively low in autumn and winter or the delivery time is too long due to a long distance, the temperature of the food in the delivery box will continue to drop, affecting the dining experience of customers.

[0048] Currently, usually only a heat-insulating pad is placed at the bottom of the delivery box, and heat is released by the heat-insulating pad to keep the food in the box warm. However, the size of the heat-insulating pad is fixed after production. When it is applied to delivery boxes of different specifications and sizes, it is necessary to re-open the mold for production according to the requirements, increasing the production cost.

[0049] To solve the above problems, the present invention provides a heat-insulating pad dedicated to takeout food. Figures 1 to 4 This is a specific embodiment of the heat-insulating pad dedicated to takeout food provided by the present invention.

[0050] Please refer to Figures 1 to 2 , the heat-insulating pad 100 dedicated to takeout food includes a plurality of heat-insulating devices 1 and a plurality of connecting structures 2 for respectively connecting the heat-insulating devices 1. Each of the connecting structures 2 includes a main body portion 21 and engaging portions 22 provided at both ends of the main body portion 21. Among them, each of the heat-insulating devices 1 includes a bottom plate 11 and a heat-insulating portion 12. A mating portion 111 for engaging and cooperating with the engaging portion 22 is provided on the side of the bottom plate 11. The heat-insulating portion 12 is detachably provided on the bottom plate 11 and is used for keeping takeout food warm.

[0051] In the technical solution provided by the present invention, the engaging portions 22 provided at both ends of the main body portion 21 in each of the connecting structures 2 can be engaged and cooperated with the mating portion 111 on the bottom plate 11. In this way, according to the requirements of the specifications and sizes of the delivery box, a plurality of the heat-insulating pads can be connected and combined through the connecting structures 2 to form the heat-insulating pad 100 dedicated to takeout food of different sizes, meeting the requirements, and there is no need to re-open the mold to produce heat-insulating pads of different sizes, greatly reducing the production cost.

[0052] Specifically, in order to enable the connection structure 2 to be detachably connected while connecting multiple heat preservation devices 1 respectively, in this embodiment, elastic buckles 221 are movably arranged at both ends of each main body part 21 along the axial direction of the main body part 21. An annular clamping groove 111a extending circumferentially is provided on the side of each bottom plate 11, and the elastic buckle 221 is in clamping fit with the annular clamping groove 111a; the matching part 111 includes the annular clamping groove 111a; the clamping part 22 includes the elastic buckle 221. By operating the connecting end of the elastic buckle 221 to extend into the annular clamping groove 111a and clamping the two clamping arms into the annular clamping groove 111a, the connection can be completed. When disassembly is required, only the end far from the connecting end needs to be pressed. In addition, the coordination part is the annular clamping groove 111a, and the elastic buckle 221 can be slidably arranged along the annular clamping groove 111a. In this way, the heat preservation devices 1 can be connected by sliding the elastic buckle 221 to form the special heat preservation mat 100 for takeout food of different shapes to adapt to different-shaped delivery boxes, such as triangles, rectangles, polygons, circles, and so on.

[0053] Furthermore, in order to further adjust the special heat preservation mat 100 for takeout food after connecting each heat preservation device 1, in this embodiment, the main body part 21 includes a telescopic rod 211. Through the telescopic rod 211, the distance between the two elastic buckles 221 can be adjusted. In this way, the distance can also be adjusted according to the temperature. By increasing the distance, heat concentration caused by too high temperature of the heat preservation device 1 can be avoided. Or when the temperature of the heat preservation device 1 is relatively low, the distance can be reduced so that more heat preservation devices 1 can carry takeout food for heat preservation.

[0054] It is worth mentioning that considering that when the deliveryman just picks up the meal, the takeout food still retains a certain amount of heat. In order to make reasonable use of this part of heat, please refer to Figure 3, in this embodiment, at least part of the heat preservation part 12 includes an energy storage part 121. Each energy storage part 121 includes an energy storage layer 1211 close to the bottom plate 11 and a heat conduction layer 1212 far from the bottom plate 11. Each energy storage layer 1211 and each heat conduction layer 1212 are arranged at intervals. When the takeout food just picked up is placed on the heat preservation part 12, the takeout food will contact the heat conduction layer 1212. Under the action of the gravity of the takeout food, the heat conduction layer 1212 will be pressed down to contact the energy storage layer 1211. At this time, part of the heat of the takeout food will be transferred to the energy storage layer 1211 through the heat conduction layer 1212. When the deliveryman arrives at the customer's location and takes out the takeout food, part of the heat will be stored in the energy storage layer 1211. At this time, the heat conduction layer 1212 is not under pressure, and there is a gap between the heat conduction layer 1212 and the energy storage layer 1211, which can isolate a certain amount of heat and reduce the heat dissipation of the energy storage layer 1211. At this time, when the deliveryman puts in new takeout food again, the heat conduction layer 1212 is pressed down again to contact the energy storage layer 1211, and the energy storage layer 1211 can transfer part of the previously stored heat to the newly placed takeout food again to provide a heat preservation effect. By reusing the heat, energy is saved and the environment is protected.

[0055] It should be noted that the heat conduction layer 1212 is not specifically limited, as long as it can conduct heat. For example, it can be heat-conducting silica gel, heat-conducting gasket, etc. The energy storage layer 1211 is not specifically limited, as long as it can store heat. For example, it can be energy storage materials such as paraffin, molten salt, or phase change materials that can be used for energy storage.

[0056] Furthermore, in order to enable the heat conduction layer 1212 to quickly reset after the downward pressure is released, in this embodiment, a first elastic member 4 is provided between each energy storage layer 1211 and each heat conduction layer 1212 to play a reset role.

[0057] In addition, considering that only reusing the heat of the takeout still cannot achieve the purpose of continuous heat preservation, please refer to Figure 4 , in this embodiment, at least part of the heat preservation part 12 includes a heating part 122. Each heating part 122 includes an electric heater 1221 and an elastic sealing cover 1222 covering the electric heater 1221. When the takeout food is placed on the heating part 122, under the action of gravity, the elastic sealing pad will be pressed down to contact the electric heater 1221, and then transfer heat to the takeout food carried on the heating part 122 to provide a heat preservation effect. In addition, the elastic sealing cover 1222 can play a role in isolating air, preventing the heated gas from escaping outside the cover and losing a large amount of heat, improving the utilization rate of thermal energy, and further realizing energy conservation and environmental protection.

[0058] Furthermore, in order to enable the elastic sealing cover 1222 to quickly reset after the downward pressure is released, in this embodiment, a second elastic member 5 is provided between each of the electric heaters 1221 and each of the elastic sealing covers 1222.

[0059] It should be noted that there are no specific restrictions on the first elastic member 4 and the second elastic member 5, which can be springs, elastic sheets, and the like.

[0060] Specifically, in this embodiment, the special heat preservation mat 100 for takeout food further includes a heat insulation substrate 3, and a plurality of the heat preservation devices 1 are all arranged on the heat insulation substrate 3, and the heat insulation substrate 3 is used to prevent the temperature from being transmitted to the bottom of the delivery box and dissipating heat.

[0061] Specifically, in this embodiment, a displacement sensor and a temperature sensor are arranged on each of the elastic sealing covers 1222, and the special heat preservation mat 100 for takeout food further includes a controller, and the controller is electrically connected to the electric heater 1221 and the displacement sensor. In this way, the controller can adjust the temperature according to the obtained displacement and temperature parameters.

[0062] In addition, for the existing heat preservation mat in the form of the electric heater 1221, each of the electric heaters 1221 is controlled in power in series. At this time, there will be some electric heaters 1221 that are not in contact with the takeout food and are heated in vain. They cannot transfer heat through heat conduction and can only keep warm by heating the air, resulting in wasted electric energy and lack of environmental protection.

[0063] In view of this, please refer to Figure 5 Based on the above-mentioned special heat preservation mat 100 for takeout food, the present invention further provides a control and adjustment method for the special heat preservation mat 100 for takeout food. Among them, at least a part of the heat preservation part 12 of the special heat preservation mat 100 for takeout food includes a heating part 122, and each of the heating parts 122 includes an electric heater 1221 and an elastic sealing cover 1222 covering the electric heater 1221, and a displacement sensor is arranged on each of the elastic sealing covers 1222; the control and adjustment method for the special heat preservation mat 100 for takeout food includes the following steps:

[0064] S10: Obtain the number value of the displacements generated in a plurality of the elastic sealing covers 1222.

[0065] It should be noted that the vast majority of the plurality of heat preservation parts 12 are the heating parts 122.

[0066] S20: Determine the power adjustment strategy of each of the electric heaters 1221 according to the number value.

[0067] S40: Adjust the power of each of the electric heaters 1221 according to the power adjustment strategy of the electric heaters 1221.

[0068] In the first embodiment of the control and adjustment method of the special heat preservation mat 100 for takeout food provided by the present invention, by obtaining the number value of the displacements generated in the plurality of elastic sealing covers 1222, it can be determined how many of the electric heaters 1221 the takeout food carried on the special heat preservation mat 100 specifically contacts, and then the horizontal area size of the takeout food can be determined. Then, according to the number value, the power adjustment strategy of each of the electric heaters 1221 is determined, and the power of each of the electric heaters 1221 is adjusted according to the power adjustment strategy of the electric heaters 1221.

[0069] Please refer to Figure 6 , Figure 6 which is a schematic flowchart of the second embodiment of the control and adjustment method of the special heat preservation mat 100 for takeout food provided by the present invention.

[0070] Based on the above first embodiment, in step S20 of the control and adjustment method of the special heat preservation mat 100 for takeout food in this embodiment, it includes:

[0071] S21: When the number value is greater than the preset value, control the power of all the electric heaters 1221 to be adjusted to the rated power;

[0072] It should be noted that the preset value is selected according to the number of all the heating parts 122 in the special heat preservation mat 100 for takeout food. For example, if the number of the heating parts 122 in the special heat preservation mat 100 for takeout food is a, then the preset value is a / 2 + 1. That is, when it is determined that the takeout food occupies at least half of the area of the special heat preservation mat 100 for takeout food, it can be understood that the volume of the takeout food is relatively large, and heating only through the heating parts 122 in contact with the takeout food is not sufficient to keep the whole takeout food warm. Therefore, at this time, it is necessary to control the power of all the electric heaters 1221 to be adjusted to the rated power so that the heating parts 122 not in contact with the takeout food are also heated, and the overall temperature in the delivery box is increased by heating the air in the delivery box, further improving the heat preservation effect.

[0073] S22: When the number value is less than the preset value, determine the target positions of the elastic sealing covers 1222 that generate displacements, and control the power of each of the electric heaters 1221 within the target positions to be adjusted to the rated power.

[0074] Therefore, it can be understood that when the number value is less than the preset value, the volume of the takeout food is not too large, and it can be kept warm only by the heating parts 122 in contact with it.

[0075] In the second embodiment of the control and adjustment method of the special heat preservation pad 100 for takeout food provided by the present invention, when the individual value is greater than the preset value, the power of all the electric heaters 1221 is controlled to be adjusted to the rated power; when the individual value is less than the preset value, the target position of the elastic sealing cover 1222 that generates displacement is determined, and the power of each of the electric heaters 1221 within the target position is controlled to be adjusted to the rated power.

[0076] Please refer to Figure 7 , Figure 7 which is a schematic flow chart of the third embodiment of the control and adjustment method of the special heat preservation pad 100 for takeout food provided by the present invention.

[0077] Based on the above second embodiment, after the step S20 of the control and adjustment method of the special heat preservation pad 100 for takeout food in this embodiment, it includes:

[0078] S31: Obtain the temperature values of the elastic sealing pads within the target position;

[0079] S32: When the temperature value is greater than the preset temperature value, control the power of each of the electric heaters 1221 within the target position to be adjusted to the preset power, where the preset power is less than the rated power.

[0080] It should be noted that the preset temperature value can be set according to specific circumstances. For example, it can be set to 45 °C, 47 °C, 49 °C, etc., as long as this temperature will not damage the takeout food, because when the heating continues, the upper surface of the elastic sealing pad will continue to heat up, which may lead to the situation of damaging the outer packaging of the takeout food.

[0081] In the third embodiment of the control and adjustment method of the special heat preservation pad 100 for takeout food provided by the present invention, first, the temperature values of the elastic sealing pads within the target position are obtained. When the temperature value is greater than the preset temperature value, the power of each of the electric heaters 1221 within the target position is controlled to be adjusted to the preset power, where the preset power is less than the rated power. In this way, by reducing the power of each heating part 122, it is possible to avoid the surface temperature of each elastic sealing pad in contact with the takeout food from being too high, affecting the outer packaging of the takeout food, or performing a second high-temperature heating on the takeout food, which affects the taste of the food.

[0082] It should be understood that although the steps in the flowcharts in the embodiments of the present application are sequentially shown according to the indications of the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless there is a clear description in this article, the execution of these steps has no strict order limit, and they can be executed in other orders. Moreover, at least a part of the steps in the figure may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same moment, but can be executed at different moments, and their execution order is not necessarily sequential, but can be executed alternately or in turn with at least a part of other steps or sub-steps or stages of other steps.

[0083] It should be understood that the above is only for illustration and does not constitute any limitation to the technical solution of the present invention. In specific applications, those skilled in the art can set according to needs, and the present invention does not limit this.

[0084] It should be noted that the above-described work process is only illustrative and does not limit the protection scope of the present invention. In actual applications, those skilled in the art can select some or all of them according to actual needs to achieve the purpose of the solution of this embodiment, and there is no limitation here.

[0085] In addition, it should be noted that in this article, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or system. Without more limitations, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or system including that element.

[0086] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

Claims

1. A control and adjustment method for a special heat preservation mat for takeout food, characterized in that, Based on a special heat preservation pad for takeout food, the heat preservation pad includes a plurality of heat preservation devices and a plurality of connection structures for respectively connecting the heat preservation devices. Each of the connection structures includes a main body portion and engaging portions provided at both ends of the main body portion. Among them, each of the heat preservation devices includes: A bottom plate, on the side of which there is a fitting portion for engaging and cooperating with the engaging portion; and, A heat preservation portion, detachably arranged on the bottom plate, for heat-preserving takeout food; At least part of the heat preservation portion includes a heating portion. Each of the heating portions includes an electric heater and an elastic sealing cover covering the electric heater; a second elastic member is provided between each of the electric heaters and each of the elastic sealing covers; a displacement sensor is provided on each of the elastic sealing covers; The control and adjustment method for the special heat preservation pad for takeout food includes the following steps: Obtain the number value of the displacements generated in a plurality of the elastic sealing covers; Determine the power adjustment strategy of each of the electric heaters according to the number value; Adjust the power of each of the electric heaters according to the power adjustment strategy of the electric heaters; The determining the power adjustment strategy of the electric heaters according to the number value includes: When the number value is greater than a preset value, control the power of all the electric heaters to be adjusted to the rated power; When the number value is less than the preset value, determine the target position of the elastic sealing cover generating the displacement, and control the power of each of the electric heaters within the target position to be adjusted to the rated power.

2. The control and adjustment method of the special heat preservation pad for takeout food according to claim 1, characterized in that, Elastic buckles are movably provided at both ends of each of the main body portions along the axial direction of the main body portion. An annular card slot extending circumferentially is provided on the side of each of the bottom plates. The elastic buckles are engaged and cooperated with the annular card slots; The fitting portion includes the annular card slot; The engaging portion includes the elastic buckle.

3. The control and adjustment method of the special heat preservation pad for takeaway food according to claim 2, characterized in that, The main body portion includes a telescopic rod.

4. The control and adjustment method of the special heat preservation pad for takeaway food according to claim 1, characterized in that, A temperature sensor is provided on each of the elastic sealing covers; After determining the target position of the elastic sealing cover generating the displacement and controlling the power of each of the electric heaters within the target position to be adjusted to the rated power, it includes: Obtain the temperature values of each of the elastic sealing pads within the target position; When the temperature value is greater than a preset temperature value, control the power of each of the electric heaters within the target position to be adjusted to a preset power, where the preset power is less than the rated power.

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