Food heating pad and automatic temperature adjustment control method of food heating pad

Abstract

The invention discloses a food heating pad and an automatic temperature adjusting control method of the food heating pad, the food heating pad comprises a heating pad panel, the heating pad panel comprises an upper surface and a lower surface, a control device is assembled on the heating pad panel, the lower surface of the heating pad panel is provided with a strip-shaped boss, the strip-shaped boss is provided with a groove, a heating piece is arranged in the groove, and the heating piece is connected with the control device. The heating piece is electrically connected with the control device to receive heating control of the control device, and the control device can output a corresponding heating control instruction according to the temperature of the food to be heated. Therefore, the heating pad panel can be designed to be thinner, and due to the existence of the strip-shaped convex strips, the space heat dissipation of the lower surface of the whole heating pad panel can be better, so that the problem that the temperature of the bottom of a traditional heating pad is too high is solved. In addition, according to the automatic temperature adjusting control method, automatic temperature control can be conducted according to the actual temperature of the food to be heated, and it is guaranteed that the automatic temperature adjusting function is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of heating kitchen appliances, in particular to an automatic temperature regulation control method of a heating pad and a food heating pad. Background Art

[0002] Usually, people want to eat food at a certain temperature, which is good for health. The traditional way is to heat the food back into the pot when it is cold. But this method is very inconvenient.

[0003] In order to solve the problem of food getting cold easily and meet people's demand for convenient hot meals, warm food plates came into being.

[0004] However, the heating part of the food warming board in the prior art is usually a whole panel. When the food warming board is placed on the desktop, the panel is in close contact with the desktop, and the heat at the bottom of the panel cannot be dissipated, so that the temperature of the area where the panel contacts the desktop is too high.

[0005] In this regard, Chinese Patent Publication No. CN221180227 U discloses a vegetable warming board, comprising: a vegetable warming board main body, a heat insulating support block is provided on the bottom surface of the vegetable warming board main body, a heat dissipation channel communicating with the outside is formed between the heat insulating support block and the bottom surface of the vegetable warming board main body, a heat dissipation device for increasing the air flow rate in the heat dissipation channel to reduce the temperature of the bottom of the vegetable warming board main body is provided on the vegetable warming board main body; by providing a plurality of heat insulating support blocks spaced apart from each other and protruding downward on the bottom surface of the vegetable warming board main body, the vegetable warming board main body is suspended on the table surface through the heat insulating support blocks, which can prevent the vegetable warming board main body from scalding the table; at the same time, a heat dissipation device for increasing the air flow rate in the heat dissipation channel to reduce the temperature of the bottom of the vegetable warming board main body is provided on the vegetable warming board main body, and the heat dissipation device can increase the air flow rate in the heat dissipation channel and reduce the temperature of the bottom of the vegetable warming board main body.

[0006] This technology achieves the purpose of warming food, but there are some problems. For example, the heating device is embedded in the entire main body of the food warming board. Since the heating device (such as a heating wire) has thickness, in order to accommodate the heating device while ensuring the mechanical properties of the main body of the food warming board, the main body of the food warming board will be relatively thick, resulting in the temperature of the lower surface of the main body of the food warming board being too high, which can easily burn the tabletop. In order to solve the heat dissipation problem on the lower surface, this technology proposes to use dispersion to solve the heat dissipation problem. However, there are also some problems, such as increased costs. In addition, due to the compact structure of the entire food warming board, the fan's air volume is not large, resulting in poor heat dissipation at a position far away from the fan, and the temperature of the lower surface is still high.

[0007] Therefore, the above technical problems need to be solved. Summary of the invention

[0008] In order to overcome the deficiencies of the prior art, the present invention provides a food heating pad and an automatic temperature control method for the food heating pad, aiming to solve the problem that the main body of the existing warming plate is too thick.

[0009] In order to solve the above technical problems, one of the basic technical solutions proposed by the present invention is:

[0010] A food heating pad comprises a heating pad panel, wherein the heating pad panel comprises an upper surface and a lower surface arranged opposite to each other, and a control device is mounted on the heating pad panel;

[0011] The lower surface of the heating pad panel has a strip-shaped boss that is protruding downward, and the strip-shaped boss has a groove that is sunken in the direction of the lower surface. A heating element is arranged in the groove, and the heating element is electrically connected to the control device to accept the heating control of the control device. The control device can output a corresponding heating control instruction according to the temperature of the food to be heated;

[0012] The groove has a sealing layer near the open end, and the sealing layer seals the heating element in the groove.

[0013] Another aspect of the present invention further provides an automatic temperature control method for a food heating pad, the food heating pad comprising a heating pad panel, the heating pad panel comprising an upper surface and a lower surface disposed opposite to each other, the heating pad panel being equipped with a control device;

[0014] The lower surface of the heating pad panel has a strip-shaped boss that is protruding downward, and the strip-shaped boss has a groove that is sunken in the direction of the lower surface. A heating element is arranged in the groove, and the heating element is electrically connected to the control device to accept the heating control of the control device. The control device can output a corresponding heating control instruction according to the temperature of the food to be heated;

[0015] The groove has a sealing layer near the open end, and the sealing layer seals the heating element in the groove.

[0016] The specific steps of the control device being able to output corresponding heating control instructions according to the temperature of the food to be heated are as follows:

[0017] Receiving initial temperature information value of the food to be heated;

[0018] Determine whether the initial temperature information value is less than the preset temperature information value;

[0019] If it is less than, calculating a first temperature difference between the initial temperature information value and the preset temperature information value;

[0020] A heating control instruction is generated according to the first temperature difference, and the heating control instruction is sent to the heating element for execution, so that the heating element heats the food to be heated.

[0021] The beneficial effects of the present invention are:

[0022] The food heating pad proposed by the present invention comprises a heating pad panel, the heating pad panel comprises an upper surface and a lower surface arranged opposite to each other, the heating pad panel is equipped with a control device, the lower surface of the heating pad panel has a strip boss arranged to protrude downward, the strip boss has a groove sunken in the direction of the lower surface, a heating element is arranged in the groove, the heating element is electrically connected to the control device to accept the heating control of the control device, and the control device can output a corresponding heating control instruction according to the temperature of the food to be heated; the groove has a sealing layer near the open end, and the sealing layer seals the heating element in the groove. In this scheme, a raised strip boss is arranged on the lower surface of the heating pad panel to form a structure for accommodating the heating element. Therefore, when the heating pad panel is arranged, it can be designed to be thinner, and the presence of the strip convex strip can make the space at the lower surface of the entire heating pad panel dissipate heat better, thereby solving the problem of excessive temperature at the bottom of the traditional heating pad. On the other hand, the proposed automatic temperature control method can automatically control the temperature according to the actual temperature of the food to be heated, ensuring the realization of the automatic temperature control function. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The figure is a schematic diagram of the appearance of the food heating pad of the present invention from the perspective of the upper surface;

[0024] Figure 2 The figure is a schematic diagram of the appearance of the food heating pad of the present invention from the bottom surface perspective;

[0025] Figure 3 A front view of the bottom surface of the video heating pad of the present invention;

[0026] Figure 4 A side view of the food heating pad of the present invention in the front-to-back direction;

[0027] Figure 5 for Figure 2 A partial enlarged view of the portion A shown;

[0028] Figure 6 is a longitudinal cross-sectional view of a strip boss;

[0029] Figure 7 is a schematic block diagram of the circuit structure of the control device of the present invention;

[0030] Figure 8 A schematic flow chart of specific steps for the control device to output a heating control instruction corresponding to the temperature of the food to be heated;

[0031] Description of reference numerals:

[0032] 10-heating pad panel, 101-upper surface, 102-lower surface, 1011-effective working area, 1012-non-working area, 20-control device, 201-first part, 202-second part, 203-controller, 204-signal receiver, 205-display, 206-power supply circuit, 207-heating circuit, 30-strip boss, 301-first end, 302-second end, 303-U-shaped part, 304-groove, 305-sealing layer, 3031-cantilever part, 3032-bending part, 3041-top surface, 40-heating element, 50-insulating support block 50. DETAILED DESCRIPTION

[0033] The following will be combined with the attached Figure 1 To Attachment Figure 8 The technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] It should be noted that if there are any directions involved in the embodiments of the present invention, they shall be subject to those shown in the drawings, for example Figure 4 The upper surface 101 is defined as the upper side, and the lower surface 102 is defined as the lower side, thus defining the upper and lower positions. Figure 1 As shown, the side with the control device 20 is the left side, and the other side is the right side; Figure 1 The upper side of the upper surface 101 is shown as the rear side, and the lower side is shown as the front side. If a certain posture changes, the directional indication will also change accordingly.

[0035] The pace of modern life is accelerating, and people are often unable to enjoy freshly prepared hot food in time during their busy work and life. For example, office workers may not have heating equipment such as microwave ovens in the office, or they may not be able to heat food conveniently when they are on business trips or traveling.

[0036] In some specific occasions, such as outdoor picnics, camping, or winter, it may not be convenient to carry traditional heating equipment, and the food heating pad is small and easy to carry, making it an ideal choice.

[0037] At present, there are many kinds of food heating devices on the market, such as microwave ovens, induction cookers, electric ovens, etc. However, these devices have some limitations in use, such as large size, inconvenient to carry, uneven heating, etc. Food heating pads just make up for the shortcomings of these devices and meet the diverse needs of consumers.

[0038] In order to solve the inconvenience caused by traditional heating devices, a new type of heating device - a warming board - has emerged in the industry. However, the existing warming board has a heating component embedded in the panel of the warming board, which makes the panel too thick; and because it is embedded inside the panel, the heat dissipation effect of the lower surface of the panel is poor, the temperature is high, and it is easy to burn the tabletop.

[0039] In order to solve the above technical problems, the present invention provides a food heating pad.

[0040] like Figure 1 As shown, the food heating pad includes a heating pad panel 10 and a control device 20. The heating pad panel 10 is the main part of the entire food heating pad, which is used to assume the functions of generating heat and carrying the food to be heated. The heating pad panel 10 is preferably a plate-like structure with a small thickness, such as between 2mm-5mm. Of course, the thickness can be set according to different usage scenarios and requirements, such as being set to 3mm. Simply changing the thickness of the heating pad panel 10 should fall within the scope of protection of the present invention.

[0041] The heating pad panel 10 can be a circular plate, a square plate or an elliptical plate. It can be designed into various regular common shapes or irregular shapes or other shapes according to actual needs. For example, it can be Figure 1 The dimensions of the rectangular panel shown may be, for example, 80 cm in length, 40 cm in width, and 5 mm in thickness. This embodiment is described only as an example, and the protection scope of the present invention should not be limited thereto.

[0042] In a specific implementation, the heating pad panel 10 is made of silicone material. The heating pad panel 10 made of the silicone material is a flexible structure that can be deformed, such as being curled into a cylindrical structure or folded into a laminated structure. In this way, it can be curled or folded for storage during transportation and non-use, saving space and facilitating storage. The silicone material has good heat resistance, and is not prone to aging and damage during long-term use, repeated heating and cooling. In addition, the chemical properties of silicone are stable, and it is not easy to deform or deteriorate due to high temperature or long-term use. At the same time, the surface of the heating pad panel 10 formed by the silicone material will have a concave-convex texture, which is conducive to increasing the friction between the tableware and can prevent the tableware from sliding and falling on the heating pad. Furthermore, the silicone material has good plasticity, is easy to mold, and is especially suitable for one-piece molding. Of course, the silicone material is only a preferred method of the heating pad panel 10. In addition, the heating pad panel 10 can also be other flexible materials. If only the material is changed, it should also fall within the scope of protection of the present invention.

[0043] like Figure 1 and Figure 4 As shown, the heating pad panel 10 includes an upper surface 101 and a lower surface 102 that are arranged opposite to each other. The upper surface 101 forms an effective working area 1011 and a non-working area 1012. The effective working area 1011 is used to place food to be heated. For example, when the entire heating pad panel 10 is laid flat, tableware can be placed on the effective working area 1011. The non-working area 1012 is mainly a non-heating area and a non-placement area for food to be heated. For example, in a specific embodiment, Figure 1 As shown. The effective working area 1011 is a rectangular area set on the upper surface 101. The other areas outside the non-rectangular area of ​​the upper surface 101 are all non-working areas 1012. In this embodiment, the effective working area 1011 is formed by the upper surface 101 protruding upward. Figure 3As shown, the top of the effective working area 1011 is higher than the top of the non-working area 1012. That is, the so-called effective working area 1011 is formed by protruding upward in the entire upper surface 101. Such a design can clearly distinguish between the position that can be used for heating and the non-heating position, and on the other hand, ensure that the thickness at the effective working area 1011 is sufficient to ensure that it is not easily damaged during use. Of course, the thickness mentioned here is sufficient relative to the non-working area. For example, the effective working area 1011 is 1-2mm higher than the non-working area 1012. It should be understood that in this solution, the thickness of the effective working area 1011 will still be thinner than the existing heating pad. Among them, the non-working area is the part of the entire heating pad panel 10 except the effective working area 1011. Specifically, the non-working area 1012 is the peripheral area of ​​the effective working area 1011. Among them, since the non-working area 1012 is not the main used part, its thickness is thinner than the effective working area 1011, which is conducive to saving materials and reducing costs, making the entire heating pad thinner and easier to use.

[0044] See also Figures 1 to 4 As shown, the control device 20 is arranged in the non-working area 1012. Specifically, the control device 20 includes a first part 201 located on the upper surface 101 and a second part 202 located on the lower surface 102. During assembly, the first part 201 is placed in the non-working area 1012 of the upper surface 101, and the second part 202 is placed on the lower surface and is directly opposite to the first part 201 in height, and then the first part 201 and the second part 202 are connected. The first part 201 and the second part 202 form a clamp for the heating pad panel. Specifically, the first part 201 and the second part 202 are connected by screw threads to be fixed on the heating pad panel 10. Preferably, the non-working area 1012 is used to assemble the control device 20, and the area and size are larger, which is used to fix the control device 20. The remaining parts can be set to be narrower, such as Figure 1 As shown, the right side, front side and rear side of the non-working area 1012 are narrower, and the left side of the non-working area 1012 is wider. The purpose of this design is to meet the assembly of the control device 20 and to ensure that the effective working area 1011 has a sufficient area as much as possible.

[0045] Detailed, such as Figures 2 to 5As shown, the lower surface 102 of the heating pad panel 10 has a strip boss 30 that is protruding downward, and the strip boss 30 has a groove 304 that is sunken toward the lower surface 102. A heating element 40 is arranged in the groove 304. The heating element 40 is electrically connected to the control device 20 to accept the heating control of the control device 20. The control device 20 can output corresponding heating control instructions according to the temperature of the food to be heated; the groove 304 has a sealing layer 305 near the open end, and the sealing layer 305 seals the heating element 302 in the groove 304.

[0046] It is very important that, as mentioned above, the strip boss 30 is formed by the lower surface 102 of the heating pad panel 10 protruding downward. It should be understood that the lower surface 102 of the heating pad panel 10 is preferably a plane. The entire strip boss 30 is below the lower surface 102, and the corresponding heating element 40 is located within the strip boss 30 and is not embedded in the entire heating pad panel 10, that is, the heating element 40 is located outside the heating pad panel 10. In this way, the heating pad panel 10 can be designed to be thin enough to meet mechanical conditions without having to consider the traditional technology that needs to consider accommodating the heating element 40 and then thickening the heating pad panel. Therefore, the solution of the present invention can make the thickness of the entire heating pad thinner, achieve a light and thin design and lower cost.

[0047] Detailed, such as Figure 2 , Figure 3 and Figure 5 As shown, the strip boss 30 is formed by the lower surface 102 of the heating pad panel 10 protruding upward. In one embodiment, the strip boss 30 is a continuous strip structure, including a first end 301 and a second end 302, and a plurality of adjacent U-shaped portions 303 are included between the first end 301 and the second end 302, and the plurality of adjacent U-shaped portions 303 are arranged side by side and distributed in the effective heating area 1021 of the lower surface 102. That is, in this embodiment, the strip boss 30 is arranged in a folded and meandering form at the effective heating area 1021. In this way, it is ensured that the effective heating area 1021 is covered with the strip boss 30 as much as possible to improve the heating efficiency. Each U-shaped portion 303 is extended along the length direction of the entire heating pad panel 10. Each U-shaped portion 303 includes two cantilever portions 3031 and a bending portion 3032. The spacing between different U-shaped portions 303 is set to be consistent with the spacing between the two cantilever portions 3031. Generally speaking, the spacing can be set according to the power of the heating element 40 and the performance of the heating pad, for example, it can be between 3 mm and 10 mm. Of course, the spacing is not limited to this, and this embodiment is just a specific example.

[0048] In a specific embodiment, the strip-shaped boss 30 is configured to be an integrated structure with the heating pad panel 10. That is, it is realized by an integrated molding process during molding. For example, when opening the mold, a corresponding strip-shaped boss mold cavity is reserved so that it forms an integrated structure with the heating pad panel 10. The use of such a technology facilitates processing and molding and simplifies the process.

[0049] In another embodiment, Figure 6 As shown, the longitudinal section of the strip boss 30 is a tapered structure that is larger at the top and smaller at the bottom. That is, from the longitudinal section, the lateral size of the strip boss 30 is larger at the top and smaller at the bottom, and gradually decreases from top to bottom. With such a design, on the one hand, the contact and connection area between the upper end of the strip boss 30 and the lower surface 102 of the heating pad panel 10 is larger, which is beneficial to strengthen the connection strength between the strip boss 30 and the heating pad panel 10 and avoid tearing damage; on the other hand, the structural design of larger at the top and smaller at the bottom is also beneficial to mold demolding. Among them, as Figure 6 As shown, in order to further strengthen the connection strength between the strip boss 30 and the heating pad panel 10, the plane 01 where the top surface 3041 of the groove 304 is located is located below the plane 02 where the lower surface 102 of the heating pad panel 10 is located. This design makes the thickness between the top surface 3041 of the groove 304 and the upper surface 101 of the heating pad panel 10 larger, thereby strengthening the connection strength between the entire strip boss 30 and the heating pad panel 10. Especially in the process of repeated heating and cooling, repeated folding or curling, this design has an excellent strengthening effect, and can be placed in such a repeated use process to ensure that cracks will not easily appear or even directly peel off.

[0050] In addition, as mentioned above, the control device 20 includes a first portion 201 located on the upper surface 101 and a second portion 202 located on the lower surface 102, the first portion 201 and the second portion 202 are connected to clamp the heating pad panel 10; the first end 301 and the second end 302 of the strip boss 30 extend into the second portion 202. The purpose of this design is to ensure that the heating element 40 can be always located in the strip boss 30 and not exposed until it is connected to the circuit board in the control device 20.

[0051] In this solution, the heating element 40 is disposed in the groove 304. The heating element 40 is also a flexible structure, which can be bent or curled without being damaged. The heating element 40 is, for example, a heating wire. It should be understood that the heating element 40 is a conventional technology in the art and will not be described in detail in this embodiment.

[0052] It should be noted that in this solution, the heating pad panel 10 and the heating element 40 are flexible structures so that the heating pad panel 10 and the heating element 40 can be switched between curling and laying flat. That is, the heating pad panel 10 and the heating element 40 can be folded or curled. When laid flat, it is in use, and curling, folding, etc. can form a non-use state. Therefore, the entire video heating pad of the present invention can be bent or folded to meet better storage, carrying, etc.

[0053] It should be noted that in order to have a better heat conduction effect, the heating element 40 is placed at the bottom of the groove 304, that is, the heating element 40 is arranged close to the top surface 3041, so that the heat generated by the heating element 40 will be directly conducted through the heating pad panel 10 to the effective working area 1011 of the upper surface 101 of the heating pad panel 10.

[0054] In order to achieve that the heating element 40 can be stably fixed in the groove 304, a sealing layer 305 is filled in the groove 304. The sealing layer 305 is preferably a thermal conductive adhesive material. During the specific production, the heating element 40 is embedded in the bottom of the guide groove 304, and then the groove 304 is sealed by the thermal conductive adhesive. Of course, in this solution, the sealing layer 305 does not protrude outside the notch of the groove 304. That is, the sealing layer 305 can be just flush with the notch of the groove 304 or located inside the groove 304.

[0055] Specifically, the lower surface 102 of the heating pad panel 10 has a plurality of thermal insulation support blocks 50, and the height of the plurality of thermal insulation support blocks 50 is greater than the strip boss 30 so that when the heating pad is placed on the desktop, there is a gap between the strip boss 30 and the desktop. That is, on the one hand, the thermal insulation support blocks 50 are used to support the heating pad panel 10, and on the other hand, the entire heating pad panel is supported to separate the desktop from the heating pad panel 10, so that a gap is formed between the strip boss 30 and the desktop, that is, a space for heat dissipation. The arrangement of the thermal insulation support blocks 50 can make the distance between the strip boss 30 and the desktop be between 2 mm and 10 mm. In this embodiment, the number of thermal insulation support blocks 50 is set according to the size of the heating pad panel 10. Specifically, as Figure 2 As shown, a plurality of heat-insulating support blocks 50 are arranged in a matrix on the lower surface 102 of the heating pad panel 10. In detail, the gaps between the adjacent U-shaped portions 303 are all provided with the heat-insulating support blocks 50, and the gaps between the two cantilever portions 3031 are also provided with the heat-insulating support blocks 50, wherein the heat-insulating support blocks 50 are arranged in a matrix along the length direction (i.e. Figure 2 The distance between adjacent heat-insulating support blocks 50 (in the left and right directions shown) can be set, for example, to 2 cm. Figure 2 and Figure 3As shown, the heat insulating support block 50 is arranged in a cross shape, such as a cross shape or an X shape. Such a structural design is conducive to strengthening the strength of the heat insulating support block 50. Of course, in this embodiment, the heat insulating support block 50 and the heating pad panel 10 also adopt an integrated structural design. During the specific molding, an integrated molding injection molding process can be adopted.

[0056] In addition, in order to ensure the flatness of the entire heating pad panel 10, in this embodiment, the lower surface of the second portion 202 and the bottom end surface of the insulation support block 50 are located in the same plane. In this way, when flattened, the second portion 203 and the insulation support block 50 are both in contact with the flat desktop at the same time.

[0057] In summary, the technical solution of the present invention adopts a solution in which the lower surface 102 of the heating pad panel 10 protrudes downward to form the strip boss 30, and a heating element 40 is arranged in the strip boss 30, so that the entire heating pad panel 10 can be arranged to be lighter and thinner, which is also conducive to heat dissipation and cost reduction.

[0058] In some embodiments, Figure 7 As shown, the figure shows a schematic block diagram of the circuit structure of the control device. Specifically, the control device 20 includes a controller 203, a signal receiver 204, a display 205, a power supply circuit 206 and a heating circuit 207. The controller 203 is electrically connected to the signal receiver 204, the display 205, the power supply circuit 206 and the heating circuit 207 respectively. The heating circuit 207 is used to be electrically connected to the heating element 40. The controller 203, the signal receiver 204, the power supply circuit 206 and the heating circuit 207 can be integrated on a circuit board (not shown in the figure). The circuit board is placed in the second part 202. The display 205 is arranged on the upper surface of the first part 201 to display the working condition information of the heating pad. The signal receiver 204 is a wireless communication connection module, which is implemented by an existing communication chip in this solution, and is used to communicate with an external thermometer to receive temperature information from the thermometer. The signal receiver 204 is implemented by, for example, a 4G communication module or a 5G communication module or a Bluetooth communication module or any other suitable communication means. Wherein the thermometer is usually a food thermometer. This type of food thermometer has a temperature detection function and a communication function, and is generally used to be placed in food to detect its temperature and send the temperature information to the signal receiver 204. The heating circuit 207 and the power supply circuit 206 are existing circuit designs, and are not described in detail in the embodiment, because such circuits are already very common and are existing technologies for ordinary technicians in this field. The power supply circuit 206 is connected to an external power supply device through a connection connector to realize power input.

[0059] In another embodiment, the present invention further comprises temperature sensors (not shown) distributed on the heating pad panel 10 , and these temperature sensors are electrically connected to the controller 203 for transmitting the acquired temperature to the controller 203 .

[0060] In detail, another aspect of the present invention proposes an automatic temperature control method for a food heating pad, the food heating pad includes a heating pad panel 10, the heating pad panel 10 includes an upper surface 101 and a lower surface 102 arranged opposite to each other, and a control device 20 is installed on the heating pad panel 10; the lower surface 101 of the heating pad panel 10 has a strip boss 30 protruding downward, the strip boss 30 has a groove 304 sunken toward the lower surface, a heating element 40 is arranged in the groove 304, the heating element 40 is electrically connected to the control device 20 to accept the heating control of the control device, and the control device 20 can output corresponding heating control instructions according to the temperature of the food to be heated; the groove 304 has a sealing layer 305 near the open end, and the sealing layer 305 seals the heating element 40 in the groove 304.

[0061] like Figure 8 As shown, the specific steps of the control device 20 being able to output corresponding heating control instructions according to the temperature of the food to be heated are as follows:

[0062] Receiving initial temperature information value of the food to be heated;

[0063] Determine whether the initial temperature information value is less than the preset temperature information value;

[0064] If it is less than, calculating a first temperature difference between the initial temperature information value and the preset temperature information value;

[0065] A heating control instruction is generated according to the first temperature difference, and the heating control instruction is sent to the heating element for execution, so that the heating element heats the food to be heated.

[0066] Specifically, receiving the initial temperature information value of the food to be heated specifically means that the signal receiver 204 of the control device 20 receives the temperature information of the thermometer placed in the food to be heated. That is, in this embodiment, the receiving the initial temperature information value of the food to be heated specifically means that the thermometer located at the food to be heated obtains the initial temperature information value of the food to be heated; the thermometer sends the initial temperature information value to the signal receiver 204 provided in the control device through the first signal device provided in the thermometer, and the signal receiver 204 receives the initial temperature information value.

[0067] Generally speaking, the food to be heated is placed in a container. In this embodiment, the food thermometer is placed in the food in the container, so that the food thermometer can obtain the temperature information of the food to be heated, and send it to the signal receiver 204 in real time through the first signal transmitter. Usually, before use, it is necessary to pair the signal receiver 204 with the food thermometer so that the two can establish a signal connection. For example, the two can be paired by Bluetooth connection to achieve information transmission. Food thermometers with signal transmission function are prior art, and this embodiment will not describe them in detail. Those of ordinary skill in the art can select a suitable existing food thermometer according to the description herein to implement the technical solution of the present invention.

[0068] In this solution, the initial temperature information value of the food to be heated may be obtained by other means besides by a food thermometer, such as obtaining the temperature information of the corresponding position by the sensor disposed in the heating pad panel 10 as described above, and transmitting it to the controller 203.

[0069] After receiving the initial temperature information value, it is necessary to determine whether the initial temperature information value is less than the preset temperature information value. That is, the initial temperature information value is compared with the preset temperature information value. For example, when the temperature corresponding to the received initial temperature information value is 30°C, and the temperature corresponding to the preset temperature information value is 55°C. Then when making a judgment, the temperature values ​​of both will be calculated. Obviously, the temperature corresponding to the preset temperature information is greater than the temperature corresponding to the initial temperature information value.

[0070] The preset temperature information value is preset, and the preset temperature information value is obtained by at least one of key input, touch screen input, remote control input and remote transmission of smart devices. For example, it can be factory set. A plurality of preset temperature gear buttons are set at the control device 20. Each gear button is connected to the controller 203 of the control device 20. Each gear button represents a preset temperature gear. For example, three gear buttons are set, and the three gear buttons can be set to 40°C, 60°C and 100°C. Of course, this is just an example, and it is not limited to this. It can be other number of gear buttons, and the corresponding preset temperature can also be changed according to the preset. In addition, the preset can also be achieved by key adjustment. For example, through a rotary button connected to the controller 203, when different gears of the rotary button represent multiple different preset temperature values. The rotary button can set multiple gears. For example, the temperature difference of each gear is 1°C. Of course, this is also an example, and it is not limited to this. For example, touch screen input control adjustment can also be achieved through the display 205.

[0071] After the second step, if the initial temperature information value is less than the preset temperature information value, such as the initial temperature is 30°C and the preset temperature information is 55°C, the first temperature difference between the initial temperature information value and the preset temperature information value is calculated. For example, if the initial temperature is 30°C and the preset temperature information is 55°C, the first temperature difference is 25°C.

[0072] Finally, a heating control instruction is generated according to the first temperature difference, and the heating control instruction is sent to the heating element 40 to perform heating, so that the heating element heats the food to be heated. That is, when it is judged that the temperature of the food to be heated is lower than the preset temperature value, the controller 203 will control the heating element 40 to heat according to the first temperature difference so that the heating pad heats up to heat the food to be heated. When performing heating control, the controller 203 can output a preset heating execution instruction. For example, the heating control of the heating element 40 is realized with a power output of 500w. In addition, when the heating power of the heating element 40 is controlled, different step power outputs can be executed. As mentioned above, the first temperature difference is 25℃. Then the heating control with a heating power of 1000w is executed between 30℃ and 40℃; the heating control with a heating power of 700w is executed between 40℃ and 50℃; and the heating power output of 500w is executed between 50℃ and 55℃. With such a scheme, the continuous warming of dishes can be ensured and energy saving can be achieved.

[0073] During the heating process, the real-time temperature information of the food to be heated is continuously received. Once the real-time temperature information obtained exceeds the preset temperature information value, the controller 203 stops controlling the heating element 40, that is, controls the heating element 40 to stop heating.

[0074] In another specific embodiment, a heating control instruction is generated according to the first temperature difference, and the heating control instruction is sent to the heating element for execution, so that after the heating element heats the food to be heated, it includes a step of judging whether the temperature is qualified, and the step of judging whether the temperature is qualified is specifically to obtain the real-time temperature information value of the food to be heated, and then compare the real-time temperature information value with the preset temperature information value to obtain a second difference; if the second difference is greater than the first preset temperature difference, the heating control instruction is output to the heating element, so that the heating element is executed until the second difference is less than the first preset temperature difference; if the second difference is less than the first preset temperature difference, the heating control instruction is not output. The purpose of this method is to solve the temperature error and the situation where the food to be heated can continue to be heated by preheating the heating pad panel 10. It should be understood that, for example, if the preset temperature is 55°C, then it is necessary to allow a certain error range due to the error of the actual detected temperature. For example, if the real-time temperature detected is 54°C, it is allowed to stop heating, that is, stop the operation of the heating element 40. At this time, the residual heat of the heating element 40 and the heating pad panel 10 can be used to heat the food to be heated, which can effectively utilize the residual heat and save energy.

[0075] For example, if the first preset temperature difference is 2°C and the preset temperature is 55°C, when the detected real-time temperature is 50°C, the second difference at this time is 5°C, which is greater than the first preset temperature difference of 2°C, and the controller 203 will continue to control the heating element 40 to perform heating treatment according to the preset power. When the real-time temperature obtained again is 53.5°C, the second difference is 1.5°C, which is less than the first preset temperature difference, and the controller 203 controls the heating element 40 to stop working. This time, the preheating of the heating pad panel 10 and the heating element 40 will be transferred to the food to be heated for further heating treatment. In this way, the efficient use of energy is achieved. Of course, it should be understood that the first preset temperature difference can be preset. Different temperature values ​​can be set according to different weather, seasons, heating elements, heating pad panels 10, etc. The basic idea is that in places with high temperatures and poor air flow, the first preset temperature difference can be set larger, and in places with low temperatures and good air flow, the first preset temperature difference can be set smaller.

[0076] In short, through the technical solution of the present invention, the actual temperature of the food to be heated can be received more realistically, and the heating operation of the heating element 40 can be controlled according to the difference between the actual temperature of the food to be heated and the preset temperature, thereby realizing the function of automatically heating the food according to the actual temperature of the food to be heated, and meeting the user's usage needs.

[0077] According to the disclosure and teaching of the above description, those skilled in the art to which the present invention belongs may also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the scope of protection of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the present invention.

Claims

1. A food heating pad, comprising a heating pad panel, wherein the heating pad panel comprises an upper surface and a lower surface disposed opposite to each other, and a control device is mounted on the heating pad panel, characterized in that: The lower surface of the heating pad panel has a strip-shaped boss that is protruding downward, and the strip-shaped boss has a groove that is sunken in the direction of the lower surface. A heating element is arranged in the groove, and the heating element is electrically connected to the control device to accept the heating control of the control device. The control device can output a corresponding heating control instruction according to the temperature of the food to be heated; The groove has a sealing layer near the open end, and the sealing layer seals the heating element in the groove.

2. A food heating pad as claimed in claim 1, characterized in that: The strip-shaped boss is a continuous strip structure, including a first end and a second end, and a plurality of adjacent U-shaped portions are disposed side by side and distributed in the effective heating area of ​​the lower surface.

3. A food heating pad as claimed in claim 2, characterized in that: The control device includes a first portion located on the upper surface and a second portion located on the lower surface, the first portion and the second portion being connected to clamp the heating pad panel; The first end and the second end of the strip-shaped boss extend into the second portion.

4. A food heating pad as claimed in claim 1, characterized in that: The longitudinal section of the strip-shaped boss is a tapered structure that is larger at the top and smaller at the bottom.

5. A food heating pad as claimed in claim 1, characterized in that: The lower surface of the heating pad panel is provided with a plurality of heat-insulating support blocks, the height of which is greater than the strip-shaped bosses, so that when the heating pad is placed on a desktop, there is a gap between the strip-shaped bosses and the desktop.

6. A food heating pad as claimed in claim 1, characterized in that: The heating pad panel and the heating element are flexible structures so that the heating pad panel and the heating element can be switched between rolling and laying flat.

7. An automatic temperature control method for a food heating pad, the food heating pad comprising a heating pad panel, the heating pad panel comprising an upper surface and a lower surface disposed opposite to each other, the heating pad panel being equipped with a control device, characterized in that: The lower surface of the heating pad panel has a strip-shaped boss that is protruding downward, and the strip-shaped boss has a groove that is sunken in the direction of the lower surface. A heating element is arranged in the groove, and the heating element is electrically connected to the control device to accept the heating control of the control device. The control device can output a corresponding heating control instruction according to the temperature of the food to be heated; The groove has a sealing layer near the open end, and the sealing layer seals the heating element in the groove. The specific steps of the control device being able to output corresponding heating control instructions according to the temperature of the food to be heated are as follows: Receiving initial temperature information value of the food to be heated; Determine whether the initial temperature information value is less than the preset temperature information value; If it is less than, calculating a first temperature difference between the initial temperature information value and the preset temperature information value; A heating control instruction is generated according to the first temperature difference, and the heating control instruction is sent to the heating element for execution, so that the heating element heats the food to be heated.

8. The automatic temperature control method of a food heating pad according to claim 7, characterized in that: The initial temperature information value of the food to be heated is specifically received as follows: A thermometer located at the food to be heated obtains an initial temperature information value of the food to be heated; The thermometer sends the initial temperature information value to a signal receiver disposed in the control device through a first signal device disposed in the thermometer, and the signal receiver receives the initial temperature information value.

9. The automatic temperature control method of a food heating pad according to claim 7, characterized in that: The preset temperature information value is obtained by at least one of key input, touch screen input, remote control input and remote transmission of a smart device.

10. The automatic temperature control method of a food heating pad according to claim 7, characterized in that: A heating control instruction is generated according to the first temperature difference, and the heating control instruction is sent to the heating element for execution, so that the heating element heats the food to be heated and includes a step of determining whether the temperature is qualified. The step of determining whether the temperature is qualified specifically includes: Obtaining real-time temperature information of food to be heated; Comparing the real-time temperature information value with the preset temperature information value to obtain a second difference value; If the second difference is greater than the first preset temperature difference, outputting the heating control instruction to the heating element so that the heating element is executed until the second difference is less than the first preset temperature difference; If the second difference is smaller than the first preset temperature difference, the heating control instruction is not output.

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