A cooking device and an internal temperature regulation method for a cooking device

Abstract

The cooking device and the internal temperature adjustment method of the cooking device provided by the present invention include: a heating cavity with a carrier for holding food placed therein; a plurality of heating units distributed on the carrier and adapted to heat the food placed on the carrier; a temperature detection unit respectively communicatively connected to each of the heating units and adapted to detect the temperature at the corresponding position of each of the heating units in the heating cavity; and a controller respectively communicatively connected to each of the heating units and the temperature detection unit. With such a setting, the opening and closing of the heating units at different positions can be correspondingly adjusted, and then the heating temperature at different positions on the carrier can be adjusted, improving the uniformity of cooking and heating of the food on the carrier. Since the food to be heated is mainly placed on the carrier, the uniformity of heating of different positions of the food by the cooking device can be improved, realizing the fine adjustment of the temperature on the carrier and increasing the automation level of temperature adjustment.

Description

Technical Field

[0001] The present invention relates to the technical field of household cooking utensils, and particularly relates to a cooking device and an internal temperature adjustment method for a cooking device. Background Art

[0002] Nowadays, there are more and more types of cooking devices for heating food on the market, such as steam ovens, ovens, air fryers, steam ovens, etc. When using a cooking device to heat food in daily life, problems such as uneven heating of food, resulting in inconsistent color, different degrees of doneness, and poor baking effect are often encountered.

[0003] In the prior art, the internal temperature is mainly measured by setting temperature sensors, and the temperature is changed by controlling the heating elements on the side wall of the heating cavity in different directions for temperature compensation. However, with such a setting, the temperature adjustment in the heating cavity is still relatively rough, and it is difficult to precisely adjust the uniformity of the heat source heating food at different positions, affecting the user experience. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of rough temperature adjustment in the heating cavity of the cooking device in the prior art and poor uniformity of the heat source heating food at different positions, so as to provide a cooking device and an internal temperature adjustment method for a cooking device.

[0005] The present invention provides a cooking device, including: a heating cavity, internally provided with a carrier for holding food; a plurality of heating units, distributed on the carrier and adapted to heat the food placed on the carrier; a temperature detection unit, respectively communicatively connected to each of the heating units and adapted to detect the temperature at the corresponding position of each heating unit in the heating cavity; a controller, respectively communicatively connected to each of the heating units and the temperature detection unit.

[0006] The heating unit includes: a first heating element, arranged along the bottom surface of the carrier and connected in parallel with the first heating element of the adjacent heating unit; a switch element, connected in series with the first heating element and communicatively connected to the temperature detection unit and the controller.

[0007] The heating unit further includes: a second heating element, arranged adjacent to the first heating element and connected in parallel with the first heating element; a positive temperature coefficient thermistor, connected in series with the second heating element.

[0008] The cooking device further includes: an upper heating element, distributed along the lower side of the top surface of the heating cavity; a lower heating element, distributed along the lower side of the bottom surface of the heating cavity.

[0009] One side of the heating cavity is provided with an opening and closing door, which is suitable for placing or taking out the food to be cooked. An observation window is arranged in the middle of the opening and closing door, and a heat-insulating glass in a transparent state is arranged on the observation window. The temperature detection unit is arranged inside the heat-insulating glass; the temperature detection unit is an infrared temperature measurement module, which is arranged in the direction of the bearing member.

[0010] A plurality of infrared temperature measurement lenses are arranged on the temperature detection unit, and the infrared temperature measurement lenses are arranged in the direction of each heating unit, and are suitable for detecting the temperature at the corresponding position of each heating unit.

[0011] The heating units are evenly and completely distributed along the bottom surface of the bearing member.

[0012] The bearing member further includes: a heat conduction plate, which is arranged between the heating unit and the bottom surface of the heating cavity, and a plurality of connection holes are evenly distributed thereon, and are suitable for connecting the heating unit.

[0013] The present invention also provides an internal temperature adjustment method for a cooking device, including: controlling the heating unit to heat the bearing member; obtaining the temperature information at the positions of each heating unit on the bearing member; judging whether the temperatures at the positions of each heating unit on the bearing member are uniform; if so, controlling the states of each heating unit to remain unchanged; if not, turning off the heating units at the positions higher than the temperature average value, and keeping the states of the heating units at the positions lower than the temperature average value.

[0014] The judging whether the temperatures at the positions of each heating unit on the bearing member are uniform includes: judging whether the maximum temperature difference between the first heating elements at the positions of each heating unit on the bearing member is less than a first preset value.

[0015] The "turning off the heating units at the positions higher than the temperature average value and keeping the states of the heating units at the positions higher than the temperature average value" includes: disconnecting the switch elements connected in series with the first heating elements on the heating units at the positions higher than the temperature average value, and keeping the switch elements connected in series with the first heating elements on the heating units at the positions lower than the temperature average value connected.

[0016] After the "if not, turning off the heating units at the positions higher than the temperature average value and keeping the states of the heating units at the positions lower than the temperature average value", it further includes: after a first preset duration, returning to the step of judging whether the temperatures at the positions of each heating unit on the bearing member are uniform.

[0017] After the step of "if so, keep the states of the respective heating units unchanged", the method further includes: obtaining the temperature difference between the first heating element and the second heating element on each heating unit; determining whether the temperature difference value is within a first value range; if so, keeping the state of the switching element on the corresponding heating unit unchanged; if not, when the temperature of the first heating element is greater than the temperature of the second heating element, controlling the switching element on the corresponding heating unit to disconnect, and when the temperature of the first heating element is less than the temperature of the second heating element, controlling the switching element on the corresponding heating unit to remain connected.

[0018] The step of controlling the heating unit to heat the carrier further includes: controlling the upper heating element and the lower heating element to start to heat the interior of the heating cavity.

[0019] Before the step of obtaining the temperature information at the positions corresponding to the respective heating units on the carrier, the method further includes: determining whether the heating unit, the upper heating element and the lower heating element are heated for a second preset duration; if so, controlling the temperature detection unit to start.

[0020] The technical solution of the present invention has the following advantages:

[0021] 1. The cooking device provided by the present invention includes: a heating cavity with a carrier for holding food placed therein; a plurality of heating units distributed on the carrier and adapted to heat the food placed on the carrier; a temperature detection unit communicatively connected to each of the heating units and adapted to detect the temperature at the positions corresponding to the respective heating units in the heating cavity; and a controller communicatively connected to each of the heating units and the temperature detection unit.

[0022] By providing a plurality of independently controlled heating units on the carrier, detecting the corresponding positions of each heating unit through the temperature detection unit, and receiving the temperature signals through the controller, the opening and closing of the heating units at different positions can be adjusted correspondingly, thereby adjusting the heating temperature at different positions on the carrier, improving the uniformity of cooking and heating the food on the carrier. Since the food to be heated is mainly placed on the carrier, such an arrangement can improve the uniformity of heating different positions of the food by the cooking device, realize the fine adjustment of the temperature on the carrier, increase the automation level of temperature adjustment, and effectively overcome the defects of the rough temperature adjustment in the heating cavity of the cooking device in the prior art and the poor uniformity of heating different positions of the food by the heat source.

[0023] 2. In the cooking device provided by the present invention, the heating unit further includes: a second heating element disposed adjacent to the first heating element and connected in parallel with the first heating element; and a positive temperature coefficient thermistor connected in series with the second heating element.

[0024] With such a setting, on the one hand, during the startup heating process of the second heating element, the positive coefficient thermistor in series with it heats up and its resistance gradually increases, the current passing through the second heating element gradually decreases, thereby reducing the heat generation of the second heating element, making the temperature on the second heating element in a dynamically regulated stable state, and avoiding overheating problems. On the other hand, the second heating element and the first heating element are adjacently arranged within the same heating unit, which can increase the heating area of the heating unit. At the same time, they are connected in parallel and are independent of each other, facilitating the first heating element in the same heating unit to perform fine temperature adjustment according to the second heating element with high temperature stability, further improving the temperature uniformity among the heating units.

[0025] 3. For the cooking device provided by the present invention, the upper heating element is distributed and arranged on the lower side of the top surface of the heating cavity; the lower heating element is distributed and arranged on the lower side of the bottom surface of the heating cavity.

[0026] The setting of the upper and lower heating elements can serve as the main heat source within the heating cavity. Combined with the setting of the heating unit, it can quickly heat the heating cavity and adjust the temperature of the areas with uneven temperature.

[0027] 4. The cooking device provided by the present invention further includes: a heat conduction plate, which is arranged between the heating unit and the bottom surface of the heating cavity, and is evenly distributed with a plurality of connection holes thereon, suitable for connecting the heating unit.

[0028] Setting the heat conduction plate can connect and fix each heating unit through the connection holes distributed thereon, sandwich the heating unit between the heat conduction plate and the carrier. At the same time, the setting of the connection holes facilitates the temperature exchange between the gaps between the heating units and the air inside the inner container, improving the temperature stability at each position on the carrier and the temperature control accuracy of the heating unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0030] Figure 1 It is an exploded view of the structure of the carrier and the upper heating unit on the cooking device provided in the embodiment of the present invention;

[0031] Figure 2 It is a schematic structural diagram of the cooking device provided in the embodiment of the present invention;

[0032] Figure 3 For Figure 2 the exploded view of the structure of the cooking device shown;

[0033] Figure 4 For Figure 1 A schematic structural view of the carrier on the cooking device shown and another angle of the heating unit thereon;

[0034] Figure 5 For Figure 4 An enlarged schematic view of the structure of part A of the heating unit on the cooking device shown;

[0035] Figure 6 For Figure 2 A schematic structural view of the opening and closing door in the cooking device shown;

[0036] Figure 7 For Figure 6 A schematic structural view of the temperature detection unit on the opening and closing door shown;

[0037] Figure 8 A schematic view of the steps for internal temperature regulation of the cooking device provided in the embodiment of the present invention;

[0038] Figure 9 A schematic circuit diagram of the heating unit provided in the embodiment of the present invention.

[0039] Explanation of reference numerals:

[0040] 1 - housing; 11 - heating chamber; 12 - opening and closing door; 13 - heat insulation glass; 2 - heating unit; 21 - first heating element; 23 - second heating element; 3 - temperature detection unit; 31 - infrared temperature measurement lens; 32 - mounting bracket; 4 - carrier; 5 - heat conduction plate; 51 - connection hole; 6 - bottom plate assembly; 7 - water box assembly; 8 - back plate. Detailed embodiments

[0041] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0042] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0045] Such as Figure 1 - Figure 9 , this embodiment provides a cooking device, specifically a steam oven, which can also be a steamer, an oven, an air fryer, a microwave oven, etc., including: a heating cavity 11, a plurality of heating units 2, a temperature detection unit 3, and a controller.

[0046] Specifically, the cooking device includes a housing 1 provided on the outside, a water box assembly provided on the back plate and the bottom wall, and a bottom plate assembly 6. A heating cavity 11 is provided inside the housing 1. A carrier 4 is provided inside the heating cavity 11. In this embodiment, the carrier 4 is a baking tray, which can also be a grill, a tray, etc. A plurality of symmetrically arranged protrusions or grooves connecting the carrier 4 are provided at different heights on the inner side wall of the heating cavity 11. An opening and closing door 12 with a handle is also provided on one side of the heating cavity 11, through which the food to be cooked can be placed or taken out. An observation window with a heat-insulating glass is provided in the middle of the opening and closing door 12.

[0047] A plurality of heating units 2 are distributed on the carrier 4 and can heat the food placed on the carrier 4. In this embodiment, the heating unit 2 is a block with an internal heating wire, which can be connected to an external power source through an internal power source or a wire with an outer heat-insulating layer. The temperature detection unit 3 is communicatively connected to each heating unit 2 respectively, specifically an indirect electrical connection, and can also be a wireless connection, and can detect the temperature at the corresponding positions of each heating unit 2 on the carrier 4 in the heating cavity 11; the controller is specifically a single-chip microcomputer, which can also be a small PLC, etc., and is electrically connected to each heating unit 2 and the temperature detection unit 3 respectively.

[0048] A plurality of independently controlled heating units 2 are provided on the carrier 4. The temperature detection unit 3 is used to detect the corresponding positions of each heating unit 2. After the controller receives the temperature signal, the opening and closing of the heating units 2 at different positions can be correspondingly adjusted, thereby adjusting the heating temperature at different positions on the carrier 4, improving the uniformity of food cooking and heating on the carrier 4. Since the food to be heated is mainly placed on the carrier 4, such a setting can improve the uniformity of heating different positions of the food by the cooking device, realize the refined adjustment of the temperature on the carrier 4, increase the automation level of temperature adjustment, and effectively overcome the defects of the rough temperature adjustment in the heating cavity 11 of the cooking device in the prior art and the poor uniformity of heating different positions of the food by the heat source.

[0049] In this embodiment, the heating unit 2 includes a first heating element 21 and a switching element connected in series. The first heating element 21 is plate-shaped and connected to the bottom surface of the carrier 4, which can be adhesively or detachably clamped, or can be embedded inside the carrier 4. The first heating elements 21 on each heating unit 2 are connected in parallel. The switching element can control the opening or closing of the first heating element 21 on the same heating unit 2. In this embodiment, the switching element is an electric control switch, which is electrically connected to the temperature detection unit 3 and the controller.

[0050] The heating unit 2 further includes a second heating element 23 and a positive coefficient thermistor connected in series. The second heating element 23 is also plate-shaped, arranged side by side and adjacent to the first heating element 21, and is connected in parallel with the first heating element 21. In this embodiment, the positive coefficient thermistor is a thermistor diode.

[0051] With such a setting, on the one hand, during the start-up heating process of the second heating element 23, the resistance value of the positive coefficient thermistor connected in series with it gradually increases as it is heated, and the current passing through the second heating element 23 gradually decreases, thereby reducing the heat generation of the second heating element 23, making the temperature on the second heating element 23 in a dynamically adjusted stable state and avoiding overheating problems. On the other hand, the second heating element 23 and the first heating element 21 are arranged adjacent to each other in the same heating unit 2, which can increase the heating area of the heating unit 2. At the same time, they are connected in parallel and are independent of each other, facilitating the first heating element 21 in the same heating unit 2 to perform fine temperature adjustment according to the second heating element 23 with high temperature stability, further improving the temperature uniformity among the heating units 2.

[0052] As Figure 9 shown, it is the connection circuit between the first heating elements 21 and the second heating elements 23 on the carrier 4 in this embodiment. Among them, a1 - a6 are the heating wires on each second heating element 23, which can also represent its temperature, b1 - b6 are the heating wires on each first heating element 21, which can also represent its temperature, e1 - e6 are the positive coefficient thermistors, and K1 - K6 are the switching elements.

[0053] The cooking device further includes an upper heating element disposed along the lower side of the top surface of the heating cavity 11, and a lower heating element disposed along the lower side of the bottom surface of the heating cavity 11. Both the upper and lower heating elements are heating tubes arranged in a spiral shape. The arrangement of the upper and lower heating elements can serve as the main heat source in the heating cavity 11. Combined with the arrangement of the heating unit 2, the heating cavity 11 can be quickly heated, and the temperature of the areas with uneven temperature can be adjusted.

[0054] As a transformable embodiment, a lateral heating element can also be provided on the side wall of the heating cavity 11. As another transformable embodiment, the upper and lower heating elements and the lateral heating element can all be composed of a plurality of heating units 2.

[0055] The number of the temperature detection units 3 is not limited, as long as it can detect the temperature at the corresponding position of the heating unit 2 on the carrier 4. In this embodiment, as a preferred embodiment, the temperature detection unit 3 is an infrared temperature measurement module, which is arranged towards the carrier 4. Specifically, two temperature detection units 3 are provided, both of which are arranged inside the heat insulation glass 13 arranged in a double layer. One is arranged at the top end of the heat insulation glass 13, and the other is arranged at the bottom side of the heat insulation glass 13, so as to detect the upper and lower surfaces of the carrier 4 respectively, and improve the uniformity of detection.

[0056] Furthermore, the temperature detection unit 3 includes a mounting bracket 32 and a plurality of infrared temperature measurement lenses 31 arranged on the mounting bracket 32. The infrared temperature measurement lenses 31 are arranged towards each heating unit 2. The number of the temperature detection unit 3 and the infrared temperature measurement lenses 31 thereon can be correspondingly set according to the number of the heating units 2. The arrangement of the infrared temperature measurement lenses 31 can accurately detect the temperature at the corresponding position of each heating unit 2 on the carrier 4.

[0057] Furthermore, the heating units 2 are evenly spaced along the bottom surface of the carrier 4 and are completely distributed in the bottom surface area. Such an arrangement can ensure the uniformity of heating at each position on the carrier 4 for carrying food.

[0058] As a transformable embodiment, the temperature detection unit 3 further includes a thermocouple temperature sensing element, which is arranged on the periphery of each second heating element 23 and can independently detect the temperature of each second heating element 23. The infrared temperature measurement lens 31 only detects the temperature of the first heating element 21.

[0059] The carrier 4 further includes a heat conduction plate 5, specifically made of aluminum or copper. It is arranged between the heating unit 2 and the bottom surface of the heating cavity 11, and a plurality of connection holes 51 are evenly distributed thereon, through which the heating unit 2 can be connected.

[0060] The heat conduction plate 5 can be set to connect and fix each heating unit through the connecting holes 51 distributed thereon. The heating units are clamped between the heat conduction plate 5 and the carrier 4. At the same time, the arrangement of the connecting holes 51 facilitates the temperature exchange between the gaps between the heating units 2 and the air inside the inner container, improving the temperature stability at various positions on the carrier 4 and the temperature control accuracy of the heating units.

[0061] In this embodiment, the area where the connecting holes 51 are located corresponds to the positions of the gaps between the heating units 2, which not only facilitates connecting the heating units 2 at the edge positions but also expands the temperature exchange area between the connecting holes 51 and the air in the inner container, further improving the temperature stability at various positions on the carrier 4.

[0062] This embodiment also provides an internal temperature regulation method for a cooking device, including:

[0063] S1. Control the power supplies connected to the heating units 2 and start the switch elements connected in series with the first heating element 21 on each heating element. The first heating element 21 and the second heating element 23 start to store heat and heat the carrier 4. At the same time, control the upper heating element and the lower heating element to start to heat the inside of the heating cavity 11. The timer on the controller starts and determines whether the heating time of the heating units 2, the upper heating element, and the lower heating element continues until a second preset duration. The second preset duration can be adjusted according to actual needs. In this embodiment, the second preset duration is 3 min. If the heating time does not continue until the second preset duration, continue heating. If the heating time meets the second preset duration, proceed to the next step;

[0064] S2. Start the temperature detection unit 3 and transmit the corresponding temperature information of the first heating element 21 and the second heating element 23 on the carrier 4 detected to the controller. Set the temperature at the corresponding positions of the first heating element 21 on each heating unit 2 as b, and the specific temperatures are b1, b2, b3... bn respectively. In this embodiment, there are 6 heating units 2, so bn is b6. Similarly, set the temperature corresponding to the second heating element 23 as a, and the specific temperatures are a1, a2, a3... an respectively. In this embodiment, there are 6 heating units 2, so an is a6.

[0065] S3. The controller calculates the maximum temperature difference value between the first heating elements 21 at the positions of each heating unit 2 on the carrier 4, that is, the value of bmax - bmin, and determines whether it is less than a first preset value, thereby determining whether the temperatures at the positions of each heating unit 2 on the carrier 4 are uniform. The first preset value can be adjusted according to actual needs. In this embodiment, the first preset value is 1 degree Celsius.

[0066] If not, it is considered that the temperatures among the heating units 2 are not uniform. Calculate the average value bavg between b1 - b6, disconnect the switch components corresponding to the heating units 2 with b values higher than bavg, and keep the switch components corresponding to the heating units 2 with b values higher than bavg connected. For a first preset duration, the first preset duration can be adjusted according to actual needs. In this embodiment, the first preset duration is 2 min, and return to the above temperature detection step S2.

[0067] If so, it is considered that the temperatures among the heating units 2 are uniform, control the states of the switch components of the first heating elements 21 on each heating unit 2 to remain unchanged, the coarse adjustment process is completed, and enter the fine adjustment process S4;

[0068] S4. Obtain the temperatures of the first heating element 21 and the second heating element 23, and calculate the value of the temperature difference b - a between the first heating element 21 and the second heating element 23 on each heating unit 2 on the carrier 4 through the controller, and determine whether this value is within the first value range. The range of the first value range can be adjusted according to actual needs. In this embodiment, the first value range is [-0.5, 0.5];

[0069] If not, when b - a > 0, control the switch component on the corresponding heating unit 2 to disconnect, and last for a third preset duration. The second preset duration can be adjusted according to actual needs. In this embodiment, the third preset duration is 0.5 min, and return to the starting stage of step S4.

[0070] When b - a < 0, control the switch component on the corresponding heating unit 2 to remain connected, last for a third preset duration, and return to the starting stage of step S4.

[0071] If so, keep the switch component on the corresponding heating unit 2 connected, last for a fourth preset duration. The fourth preset duration can be adjusted according to actual needs. In this embodiment, the fourth preset duration is 1 min, and return to the starting stage of step S4.

[0072] As a transformable implementation manner, in step S4, when b - a is within the first value range, just keep the switch component on the corresponding heating unit 2 connected. As another transformable implementation manner, in step S4, change to judge that the value of b - a is 0.

[0073] Obviously, the above embodiments are only examples clearly described, rather than limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or alterations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or alterations derived therefrom are still within the protection scope of the present invention.

Claims

1. A cooking device, characterized in that, Comprising: A heating chamber (11) with a carrier (4) for holding food placed therein; A plurality of heating units (2) distributed on the carrier (4) and adapted to heat the food placed on the carrier (4); A temperature detection unit (3) communicatively connected to each of the heating units (2) respectively and adapted to detect the temperature at the corresponding position of each heating unit (2) within the heating chamber (11); A controller communicatively connected to each of the heating units (2) and the temperature detection unit (3) respectively; The heating unit (2) includes: a first heating element (21) disposed along the bottom surface of the carrier (4) and connected in parallel with the first heating element (21) of an adjacent heating unit (2); a switch element connected in series with the first heating element (21) and communicatively connected to the temperature detection unit (3) and the controller; The heating unit (2) further includes: a second heating element (23) disposed adjacent to the first heating element (21) and connected in parallel with the first heating element (21); a positive temperature coefficient thermistor connected in series with the second heating element (23); During the start-up heating process of the second heating element (23), the resistance of the positive temperature coefficient thermistor connected in series therewith gradually increases when heated, the current passing through the second heating element (23) gradually decreases, thereby reducing the heat generation of the second heating element (23), so that the temperature on the second heating element (23) is in a dynamically regulated stable state, and the first heating element (21) of the same heating unit (2) performs fine temperature adjustment according to the second heating element (23) with high temperature stability, further improving the temperature uniformity among the heating units (2).

2. The cooking device according to claim 1, wherein Further comprising: An upper heating element distributed along the lower side of the top surface of the heating chamber (11); A lower heating element distributed along the lower side of the bottom surface of the heating chamber (11).

3. The cooking device according to any one of claims 1-2, wherein An opening and closing door (12) is provided on one side of the heating chamber (11) and is adapted to place or take out the food to be cooked. A viewing window is provided in the middle of the opening and closing door (12), and a heat-insulating glass (13) in a transparent state is provided on the viewing window. The temperature detection unit (3) is disposed inside the heat-insulating glass (13); The temperature detection unit (3) is an infrared temperature measurement module and is disposed in the direction of the carrier (4).

4. The cooking device according to claim 3, characterized in that, A plurality of infrared temperature measurement lenses (31) are provided on the temperature detection unit (3), and the infrared temperature measurement lenses (31) are disposed in the direction of each heating unit (2) and are adapted to detect the temperature at the corresponding position of each heating unit (2).

5. The cooking device according to any one of claims 1-2 and 4, characterized in that, The heating units (2) are evenly and completely distributed along the bottom surface of the carrier (4).

6. The cooking device according to claim 5, wherein The carrier (4) further includes: A heat conduction plate (5) disposed between the heating units (2) and the bottom surface of the heating chamber (11), and a plurality of connection holes (51) are evenly distributed thereon and are adapted to connect the heating units (2).

7. A method for adjusting the internal temperature of a cooking device, characterized in that, The internal temperature adjustment method of the cooking device is implemented by the cooking device according to claim 1, including: Control the heating unit (2) to heat the carrier (4); Obtain the temperature information at the positions of each heating unit (2) on the carrier (4); Judge whether the temperatures at the positions of each heating unit (2) on the carrier (4) are uniform; If so, control the states of each heating unit (2) to remain unchanged; If not, turn off the heating units (2) at positions higher than the temperature average value and keep the states of the heating units (2) at positions lower than the temperature average value; After "If so, control the states of each heating unit (2) to remain unchanged", it further includes: Obtain the temperature difference between the first heating element (21) and the second heating element (23) on each heating unit (2); Judge whether the temperature difference value is within the first value range; If so, keep the state of the switching element on the corresponding heating unit (2); If not, when the temperature of the first heating element (21) is greater than the temperature of the second heating element (23), control the switching element on the corresponding heating unit (2) to disconnect, and when the temperature of the first heating element (21) is less than the temperature of the second heating element (23), control the switching element on the corresponding heating unit (2) to remain connected.

8. The internal temperature adjustment method of the cooking device according to claim 7, characterized in that, The judging whether the temperatures at the positions of each heating unit (2) on the carrier (4) are uniform includes: Judge whether the maximum temperature difference between the first heating elements (21) at the positions of each heating unit (2) on the carrier (4) is less than the first preset value.

9. The internal temperature regulation method of the cooking device according to claim 7 or 8, characterized in that The turning off the heating units (2) at positions higher than the temperature average value and keeping the states of the heating units (2) at positions higher than the temperature average value includes: Disconnect the switching element connected in series with the first heating element (21) on the heating units (2) at positions higher than the temperature average value, and keep the switching element connected in series with the first heating element (21) on the heating units (2) at positions lower than the temperature average value connected.

10. The internal temperature adjustment method of the cooking device according to claim 9, characterized in that, After "If not, turn off the heating units (2) at positions higher than the temperature average value and keep the states of the heating units (2) at positions lower than the temperature average value", it further includes: After a first preset duration, return to the step of judging whether the temperatures at the positions of each heating unit (2) on the carrier (4) are uniform.

11. The internal temperature adjustment method of the cooking device according to any one of claims 7-8, characterized in that, The controlling the heating unit (2) to heat the carrier (4) further includes: Control the upper heating element and the lower heating element to start and heat the inside of the heating chamber (11).

12. The internal temperature adjustment method of the cooking device according to any one of claims 7-8, characterized in that, Before the obtaining the temperature information at the positions corresponding to each heating unit (2) on the carrier (4), it further includes: Judge whether the heating unit (2), the upper heating element and the lower heating element are heated for a second preset duration; If so, control the temperature detection unit (3) to start.

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