A cooking apparatus and a method of operating the same

Abstract

The application discloses a cooking equipment and a running method thereof. The cooking equipment comprises an oven, and the oven comprises a cooking chamber, a cooking cavity and a combustion cavity are arranged in the cooking chamber, the lower part of the cooking cavity is located in the upper part of the combustion cavity, a smoke outlet and a smoke inlet are arranged on the side wall of the cooking cavity, a combustion air inlet hole is arranged in the lower part of the cooking chamber and is communicated with the combustion cavity and the outside of the cooking equipment, the smoke outlet is arranged in the upper part of the cooking cavity, the smoke inlet is arranged on at least one of the lower part of the left side wall of the cooking cavity, the lower part of the right side wall of the cooking cavity and the lower part of the rear side wall of the cooking cavity, and the smoke inlet is communicated with the cooking cavity and the combustion cavity; a burner is installed in the combustion cavity and is located below the cooking cavity; and an electric heating pipe structure is installed on the inner wall of the cooking cavity. The application provides the cooking equipment, which is convenient for daily cleaning and can simultaneously have a gas roasting mode and an electric roasting mode.

Description

Technical Field

[0001] This invention relates to the field of kitchen appliance technology, and in particular to a cooking device and its operating method. Background Technology

[0002] A gas oven uses the heat generated by burning gas to heat the air. The heated, dry air then enters the oven and comes into contact with the food inside, thus cooking the food.

[0003] Most gas ovens on the market currently have their smoke inlets located at the bottom of the cooking cavity. During use, food residue can easily fall into the combustion chamber, making daily cleaning difficult.

[0004] Therefore, there is an urgent need for a cooking device to solve the above problems. Summary of the Invention

[0005] The present invention aims to at least partially solve one of the problems existing in the prior art. To this end, the present invention proposes a cooking device that is easy to clean and can simultaneously have gas grilling and electric grilling modes.

[0006] The above objectives are achieved through the following technical solutions:

[0007] A cooking appliance includes an oven, said oven comprising:

[0008] A cooking chamber includes a cooking body and a combustion chamber. The lower part of the cooking body is located inside the upper part of the combustion chamber. A smoke outlet and a smoke inlet are provided on the side wall of the cooking body. A combustion air inlet is provided in the lower part of the cooking chamber, connecting the combustion chamber and the outside of the cooking equipment. The smoke outlet is located in the upper part of the cooking body. The smoke inlet is located on at least one of the lower part of the left side wall, the lower part of the right side wall, and the lower part of the rear side wall of the cooking body. The smoke inlet connects the cooking body and the combustion chamber.

[0009] A burner is installed inside the combustion chamber and located below the cooking chamber;

[0010] The heating element is installed on the inner wall of the cooking cavity.

[0011] Optionally, it also includes a viewing glass, wherein an opening is provided on the bottom plate of the cooking cavity, and the viewing glass is detachably mounted on the bottom plate of the cooking cavity and located at the opening, and the viewing glass is used to seal the opening.

[0012] Optionally, it also includes an exhaust baffle and a first drive motor. The exhaust baffle is installed at the smoke outlet, and the first drive motor is connected to the exhaust baffle in a transmission manner. The first drive motor can drive the exhaust baffle to move between closing the smoke outlet and opening the smoke outlet.

[0013] Optionally, it also includes an air intake baffle and a second drive motor. The air intake baffle is installed at the smoke inlet, and the second drive motor is connected to the air intake baffle in a transmission manner. The second drive motor can drive the air intake baffle to move between closing the smoke inlet and opening the smoke inlet.

[0014] Optionally, the heating element structure includes an upper heating element and a rear heating element, with the upper heating element disposed on the upper side of the cooking cavity and the rear heating element disposed on the rear side of the cooking cavity.

[0015] Optionally, it also includes:

[0016] A first temperature detector is disposed at the upper part of the cooking cavity to detect the real-time cooking temperature at the upper part of the cooking cavity;

[0017] A second temperature detector is installed at the bottom of the cooking cavity to detect the real-time cooking temperature at the bottom of the cooking cavity.

[0018] Another aspect of the present invention provides a method for operating the cooking apparatus as described above, comprising the following steps:

[0019] S1: Start the cooking equipment;

[0020] S2: Determine whether the gas grill mode has been selected. If yes, proceed to S4; otherwise, proceed to S3.

[0021] S3: Determine whether the electric grill mode has been selected. If yes, proceed to S6; otherwise, proceed to S8.

[0022] S4: When the burner is running, the first drive motor drives the exhaust baffle to open the smoke outlet, and the second drive motor drives the intake baffle to open the smoke inlet;

[0023] S5: Determine whether the real-time cooking time t1 has reached the preset total cooking time t0. If yes, the burner stops running; otherwise, repeat S5.

[0024] S6: When the electric heating tube structure is in operation, the first drive motor drives the air outlet baffle to close the smoke outlet, and the second drive motor drives the air inlet baffle to close the smoke inlet;

[0025] S7: Determine whether the real-time cooking time t1 has reached the preset total cooking time t0. If yes, the heating element structure stops operating, and the first drive motor drives the exhaust baffle to open the smoke outlet. If no, repeat S7.

[0026] S8: The burner and the electric heating tube structure operate simultaneously, the first drive motor drives the exhaust baffle to open the smoke outlet, and the second drive motor drives the intake baffle to open the smoke inlet;

[0027] S9: Determine whether the real-time cooking time t1 has reached the preset total cooking time t0. If yes, the burner and the electric heating tube structure both stop operating, and the first drive motor drives the gas outlet baffle to open the smoke outlet. If no, repeat S9.

[0028] Optionally, both the burner and the heating element structure are started and operated at the intermediate power level.

[0029] Optionally, the following steps are included after S4:

[0030] S41: Determine whether the real-time cooking time t1 has reached the first preset time t2. If yes, proceed to S42; otherwise, repeat S41.

[0031] S42: Does the real-time temperature T1 detected by the second temperature detector reach the preset cooking temperature T01? If yes, proceed to S43; otherwise, proceed to S44.

[0032] S43: Reduce the power level of the burner by one level, and return to S42 after a second preset time t3;

[0033] S44: Increase the power level of the burner by one level, and return to S42 after the second preset time t3; and / or

[0034] S6 includes the following steps:

[0035] S61: Determine whether the real-time cooking time t1 has reached the first preset time t2. If yes, proceed to S42; otherwise, repeat S41.

[0036] S62: Calculate the average value T2 of the real-time temperature detected by the first temperature detector and the real-time temperature detected by the second temperature detector;

[0037] S63: Determine whether T2 has reached the preset cooking temperature T01. If yes, proceed to S64; otherwise, proceed to S65.

[0038] S64: Reduce the power level of the heating element structure by one level, and return to S63 after the second preset time t3;

[0039] S65: Increase the power level of the heating element structure by one level, and return to S63 after the second preset time t3; and / or

[0040] S8 also includes the following steps:

[0041] S81: Determine whether the real-time cooking time t1 has reached the first preset time t2. If yes, proceed to S82; otherwise, repeat S81.

[0042] S82: Calculate the average value T2 of the real-time temperature detected by the first temperature detector and the real-time temperature detected by the second temperature detector;

[0043] S83: Determine whether T2 has reached the preset cooking temperature T01. If yes, proceed to S84; otherwise, proceed to S85.

[0044] S84: Reduce the power level of the burner by one level, reduce the power level of the heating element structure by one level, and return to S83 after the second preset time t3.

[0045] S85: Increase the power level of the burner by one level, increase the power level of the electric heating tube structure by one level, and return to S83 after the second preset time t3;

[0046] Where t2 < t0, t3 < t0.

[0047] Compared with the prior art, the present invention has at least the following beneficial effects:

[0048] The cooking device provided by this invention places the smoke inlet on at least one of the lower parts of the left side wall, the lower part of the right side wall, and the lower part of the rear side wall of the cooking cavity. This ensures that high-temperature smoke can only enter the cooking cavity through the lower part of the side wall to cook food. This avoids the problem in existing technologies where the smoke inlet is directly located at the bottom of the cooking cavity, causing food residue to fall into the combustion cavity and contaminate it during cooking. This also facilitates cleaning the cooking cavity and reduces the likelihood of food residue falling into the combustion cavity, resulting in a better user experience. Furthermore, by simultaneously incorporating a burner and an electric heating element, this invention allows users to select different cooking modes as needed. Users can use the burner alone for gas grilling; they can use the electric heating element for electric grilling; or they can use both simultaneously for gas grilling and electric grilling. Attached Figure Description

[0049] Figure 1 This is a three-dimensional structural diagram of the cooking equipment provided by the present invention;

[0050] Figure 2A three-dimensional structural diagram of the steamer and oven of the cooking equipment provided by the present invention;

[0051] Figure 3 A three-dimensional structural schematic diagram of the cooking chamber of the cooking device provided by the present invention;

[0052] Figure 4 One of the cross-sectional structural schematic diagrams of the cooking device provided by the present invention;

[0053] Figure 5 A second cross-sectional structural schematic diagram of the cooking device provided by the present invention;

[0054] Figure 6 This is a diagram illustrating the operating steps of the cooking equipment provided by the present invention.

[0055] In the picture:

[0056] 1. Oven; 11. Cooking chamber; 12. Door; 10. Cooking chamber; 100. Combustion chamber; 101. Smoke inlet; 102. Air inlet; 103. Smoke outlet; 13. Burner; 141. Upper heating element; 142. Rear heating element; 151. First temperature detector; 152. Second temperature detector; 16. Door;

[0057] 2. Steam oven;

[0058] 3. Gas stove; 31. Stove top; 311. Exhaust grille; 32. Burner head. Detailed Implementation

[0059] The following embodiments illustrate the present invention, but the present invention is not limited to these embodiments. Modifications to the specific embodiments of the present invention or equivalent substitutions for some technical features, without departing from the spirit of the present invention, should all be covered within the scope of the technical solutions claimed in the present invention.

[0060] Please refer to Figures 1-5 This invention provides a cooking device, including an oven 1, a cooking chamber 11, a burner 13, and an electric heating element. The cooking chamber 11 contains a cooking cavity 10 and a combustion cavity 100. The lower part of the cooking cavity 10 is located within the upper part of the combustion cavity 100. The side wall of the cooking cavity 10 has a smoke outlet 103 and a smoke inlet 101. The lower part of the cooking chamber 11 has a combustion air inlet 102 connecting the combustion cavity 100 and the outside of the cooking device (air is supplied via...). Figure 4(In the direction indicated by the middle arrow C, the smoke outlet 103 is located at the upper part of the cooking chamber 10, and the smoke inlet 101 is located at at least one of the lower parts of the left side wall, the right side wall, and the rear side wall of the cooking chamber 10. The smoke inlet 101 connects the cooking chamber 10 and the combustion chamber 100. The burner 13 is installed inside the combustion chamber 100 and located below the cooking chamber 10. The heating element structure is installed on the inner wall of the cooking chamber 10.)

[0061] The cooking device provided by this invention places the smoke inlet 101 on at least one of the lower parts of the left side wall, the lower part of the right side wall, and the lower part of the rear side wall of the cooking cavity 10. This ensures that high-temperature smoke can only enter the cooking cavity 10 through the lower part of the side wall to cook food. This avoids the problem in the prior art where the smoke inlet 101 is directly placed at the bottom of the cooking cavity 10, causing food residue to fall into the combustion cavity 100 and contaminate it during cooking. This facilitates cleaning of the cooking cavity 10 and reduces the likelihood of food residue falling into the combustion cavity 100, resulting in a better user experience. Furthermore, by simultaneously incorporating the burner 13 and the heating element structure, this invention allows users to select different cooking modes as needed. Users can use the burner 13 alone for gas grilling; they can use the heating element structure for electric grilling; or they can use the burner 13 for gas grilling and the heating element structure for electric grilling simultaneously.

[0062] Optionally, a viewing glass 12 is also included. An opening is provided on the bottom plate of the cooking cavity 10, and the viewing glass 12 is detachably mounted on the bottom plate of the cooking cavity 10 and located at the opening. The viewing glass 12 is used to seal the opening. By providing the viewing glass 12 through an opening in the bottom plate of the cooking cavity 10, the user can observe the flame intensity of the burner 13 through the viewing glass 12, thereby visually adjusting the cooking flame intensity and improving the user experience.

[0063] Optionally, the burner 13 is a dual-ring infrared porous medium burner 13, and the hot gas generated by the dual-ring infrared porous medium burner 13 flows along... Figure 3 Arrow A indicates that the gas enters the cooking cavity 10 through the viewing glass 12, while the high-temperature flue gas generated by the dual-ring infrared porous media burner 13 flows along... Figure 3 The smoke enters the cooking cavity 10 through the smoke inlet 101 in the direction indicated by the middle arrow B.

[0064] Optionally, the device also includes a gas outlet baffle and a first drive motor. The gas outlet baffle is installed at the smoke outlet 103, and the first drive motor is connected to the gas outlet baffle for transmission. The first drive motor can drive the gas outlet baffle to move between closing and opening the smoke outlet 103. When the cooking mode of the cooking device is gas cooking, the first drive motor drives the gas outlet baffle to open the smoke outlet 103 to facilitate the discharge of high-temperature smoke. When the cooking mode of the cooking device is only electric, the first drive motor drives the gas outlet baffle to close the smoke outlet 103 to improve cooking efficiency.

[0065] Optionally, the device also includes an air intake baffle and a second drive motor. The air intake baffle is installed at the smoke inlet 101, and the second drive motor is connected to the air intake baffle. The second drive motor can drive the air intake baffle to move between closing and opening the smoke inlet 101. When the cooking mode of the cooking device is only electric, the second drive motor drives the air intake baffle to close the smoke inlet 101 to prevent hot air in the cooking cavity 10 from entering the combustion cavity 100 through the smoke inlet 101, thereby improving cooking efficiency. When the cooking mode of the cooking device is gas cooking, the second drive motor drives the air intake baffle to open the smoke inlet 101 so that high-temperature flue gas in the combustion chamber can enter the cooking cavity 10 through the smoke inlet 101.

[0066] Optionally, the heating element structure includes an upper heating element 141 and a rear heating element 142. The upper heating element 141 is located on the upper side of the cooking cavity 10, and the rear heating element 142 is located on the rear side of the cooking cavity 10. This is beneficial for improving cooking efficiency and for the uniform distribution of heat within the cooking cavity 10.

[0067] Optionally, the cooking cavity 10 also includes a first temperature detector 151 and a second temperature detector 152. The first temperature detector 151 is disposed in the upper part of the cooking cavity 10 and is used to detect the real-time cooking temperature of the upper part of the cooking cavity 10. The second temperature detector 152 is disposed in the lower part of the cooking cavity 10 and is used to detect the real-time cooking temperature of the lower part of the cooking cavity 10. By setting the first temperature detector 151 and the second temperature detector 152, it is convenient to adjust the operating power of the burner 13 and / or the heating element structure.

[0068] Optionally, a door 16 is also included, which is installed on the front side of the cooking chamber 11 for opening and closing the cooking chamber 10.

[0069] Optionally, a steamer 2 is also included, which is located on one side of the cooking chamber 11 for steaming food.

[0070] Optionally, it also includes a gas stove 3, which is installed above the cooking chamber 11 and the steamer 2.

[0071] Optionally, the gas stove 3 includes a stovetop 31, a burner head 32 and an exhaust grille 311 disposed on the stovetop 31. The exhaust grille 311 is located behind the burner head 32 and connected to the smoke outlet 103 for discharging high-temperature gas from the cooking cavity 10.

[0072] Please refer to Figure 6 In another aspect, the present invention provides a method for operating the cooking apparatus as described above, comprising the following steps:

[0073] S1: Start the cooking equipment;

[0074] S2: Determine whether the gas grill mode has been selected. If yes, proceed to S4; otherwise, proceed to S3.

[0075] S3: Determine whether the electric grill mode has been selected. If yes, proceed to S6; otherwise, proceed to S8.

[0076] S4: When the burner 13 is running, the first drive motor drives the exhaust baffle to open the smoke outlet 103, and the second drive motor drives the intake baffle to open the smoke inlet 101.

[0077] S5: Determine whether the real-time cooking time t1 has reached the preset total cooking time t0. If yes, the burner 13 stops running. If no, repeat S5.

[0078] S6: The electric heating tube structure is in operation. The first drive motor drives the exhaust baffle to close the smoke outlet 103, and the second drive motor drives the intake baffle to close the smoke inlet 101.

[0079] S7: Determine whether the real-time cooking time t1 has reached the preset total cooking time t0. If yes, the heating element structure stops operating. If no, repeat S7.

[0080] S8: The burner 13 and the electric heating tube structure operate simultaneously. The first drive motor drives the exhaust baffle to open the smoke outlet 103, and the second drive motor drives the intake baffle to open the smoke inlet 101.

[0081] S9: Determine whether the real-time cooking time t1 has reached the preset total cooking time t0. If yes, the burner 13 and the heating element structure will stop operating. If no, repeat S9.

[0082] Optionally, both the burner 13 and the heating element structure are started and operated at the intermediate power setting.

[0083] Optionally, the following steps are included after S4:

[0084] S41: Determine whether the real-time cooking time t1 has reached the first preset time t2. If yes, proceed to S42; otherwise, repeat S41.

[0085] S42: Does the real-time temperature T1 detected by the second temperature detector 152 reach the preset cooking temperature T01? If yes, proceed to S43; otherwise, proceed to S44.

[0086] S43: Reduce the power level of burner 13 by one level, and return to S42 after the second preset time t3;

[0087] S44: Increase the power level of burner 13 by one level, and return to S42 after a second preset time t3; and / or

[0088] S6 includes the following steps:

[0089] S61: Determine whether the real-time cooking time t1 has reached the first preset time t2. If yes, proceed to S42; otherwise, repeat S41.

[0090] S62: Calculate the average value T2 of the real-time temperature detected by the first temperature detector 151 and the real-time temperature detected by the second temperature detector 152;

[0091] S63: Determine whether T2 has reached the preset cooking temperature T01. If yes, proceed to S64; otherwise, proceed to S65.

[0092] S64: Reduce the power level of the heating element structure by one level, and return to S63 after the second preset time t3;

[0093] S65: Increase the power level of the heating element structure by one level, and return to S63 after the second preset time t3; and / or

[0094] S8 also includes the following steps:

[0095] S81: Determine whether the real-time cooking time t1 has reached the first preset time t2. If yes, proceed to S82; otherwise, repeat S81.

[0096] S82: Calculate the average value T2 of the real-time temperature detected by the first temperature detector 151 and the real-time temperature detected by the second temperature detector 152;

[0097] S83: Determine whether T2 has reached the preset cooking temperature T01. If yes, proceed to S84; otherwise, proceed to S85.

[0098] S84: Reduce the power level of burner 13 by one level, reduce the power level of electric heating tube structure by one level, and return to S83 after the second preset time t3.

[0099] S85: Increase the power level of burner 13 by one level, increase the power level of electric heating tube structure by one level, and return to S83 after the second preset time t3.

[0100] Where t2 < t0, t3 < t0.

[0101] The above are merely some embodiments of the present invention. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of the present invention, and all such modifications and improvements fall within the scope of protection of the present invention.

Claims

1. A cooking device, characterized in that, Includes an oven (1), said oven (1) comprising: A cooking chamber (11) is provided with a cooking cavity (10) and a combustion cavity (100). The lower part of the cooking cavity (10) is located in the upper part of the combustion cavity (100). A smoke outlet (103) and a smoke inlet (101) are provided on the side wall of the cooking cavity (10). A combustion air inlet (102) is provided in the lower part of the cooking chamber (11) to connect the combustion cavity (100) and the outside of the cooking equipment. The smoke outlet (103) is located in the upper part of the cooking cavity (10). The smoke inlet (101) is located in at least one of the lower part of the left side wall, the lower part of the right side wall, and the lower part of the rear side wall of the cooking cavity (10). The smoke inlet (101) connects the cooking cavity (10) and the combustion cavity (100). A burner (13) is installed inside the combustion chamber (100) and located below the cooking chamber (10); The heating element is installed on the inner wall of the cooking cavity (10).

2. The cooking apparatus according to claim 1, characterized in that, It also includes a viewing glass (12), an opening is provided on the bottom plate of the cooking cavity (10), the viewing glass (12) is detachably installed on the bottom plate of the cooking cavity (10) and located at the opening, the viewing glass (12) is used to seal the opening.

3. The cooking apparatus according to claim 2, characterized in that, It also includes an exhaust baffle and a first drive motor. The exhaust baffle is installed at the smoke outlet (103). The first drive motor is connected to the exhaust baffle in a transmission manner. The first drive motor can drive the exhaust baffle to move between closing the smoke outlet (103) and opening the smoke outlet (103).

4. The cooking apparatus according to any one of claims 1-3, characterized in that, It also includes an air intake baffle and a second drive motor. The air intake baffle is installed at the smoke inlet (101). The second drive motor is connected to the air intake baffle in a transmission manner. The second drive motor can drive the air intake baffle to move between closing the smoke inlet (101) and opening the smoke inlet (101).

5. The cooking apparatus according to any one of claims 1-3, characterized in that, The heating element structure includes an upper heating element (141) and a rear heating element (142). The upper heating element (141) is located on the upper side of the cooking cavity (10), and the rear heating element (142) is located on the rear side of the cooking cavity (10).

6. The cooking apparatus according to any one of claims 1-3, characterized in that, Also includes: A first temperature detector (151) is disposed on the upper part of the cooking cavity (10) for detecting the real-time cooking temperature of the upper part of the cooking cavity (10); A second temperature detector (152) is disposed at the lower part of the cooking cavity (10) for detecting the real-time cooking temperature at the lower part of the cooking cavity (10).

7. A method of operating a cooking apparatus as described in any one of claims 1-6, characterized in that, Includes the following steps: S1: Start the cooking equipment; S2: Determine whether the gas grill mode has been selected. If yes, proceed to S4; otherwise, proceed to S3. S3: Determine whether the electric grill mode has been selected. If yes, proceed to S6; otherwise, proceed to S8. S4: When the burner (13) is running, the first drive motor drives the exhaust baffle to open the smoke outlet (103), and the second drive motor drives the intake baffle to open the smoke inlet (101). S5: Determine whether the real-time cooking time t1 has reached the preset total cooking time t0. If yes, the burner (13) stops running. If no, repeat S5. S6: When the electric heating tube structure is in operation, the first drive motor drives the air outlet baffle to close the smoke outlet (103), and the second drive motor drives the air inlet baffle to close the smoke inlet (101). S7: Determine whether the real-time cooking time t1 has reached the preset total cooking time t0. If yes, the heating element structure stops operating, and the first drive motor drives the gas outlet baffle to open the smoke outlet (103). If no, repeat S7. S8: The burner (13) and the electric heating tube structure operate simultaneously. The first drive motor drives the exhaust baffle to open the smoke outlet (103), and the second drive motor drives the intake baffle to open the smoke inlet (101). S9: Determine whether the real-time cooking time t1 has reached the preset total cooking time t0. If yes, the burner (13) and the electric heating tube structure both stop operating, and the first drive motor drives the gas outlet baffle to open the smoke outlet (103). If no, repeat S9.

8. The method of operating the cooking equipment according to claim 7, characterized in that, The burner (13) and the electric heating tube structure are both started and operated at the intermediate power level.

9. The method of operating the cooking equipment according to claim 8, characterized in that, S4 is followed by the following steps: S41: Determine whether the real-time cooking time t1 has reached the first preset time t2. If yes, proceed to S42; otherwise, repeat S41. S42: Does the real-time temperature T1 detected by the second temperature detector reach the preset cooking temperature T01? If yes, proceed to S43; otherwise, proceed to S44. S43: Reduce the power level of the burner by one level, and return to S42 after a second preset time t3; S44: Increase the power level of the burner by one level, and return to S42 after the second preset time t3; and / or S6 includes the following steps: S61: Determine whether the real-time cooking time t1 has reached the first preset time t2. If yes, proceed to S62; otherwise, repeat S41. S62: Calculate the average value T2 of the real-time temperature detected by the first temperature detector and the real-time temperature detected by the second temperature detector; S63: Determine whether T2 has reached the preset cooking temperature T01. If yes, proceed to S64; otherwise, proceed to S65. S64: Reduce the power level of the heating element structure by one level, and return to S63 after the second preset time t3; S65: Increase the power level of the heating element structure by one level, and return to S63 after the second preset time t3; and / or S8 also includes the following steps: S81: Determine whether the real-time cooking time t1 has reached the first preset time t2. If yes, proceed to S82; otherwise, repeat S81. S82: Calculate the average value T2 of the real-time temperature detected by the first temperature detector and the real-time temperature detected by the second temperature detector; S83: Determine whether T2 has reached the preset cooking temperature T01. If yes, proceed to S84; otherwise, proceed to S85. S84: Reduce the power level of the burner by one level, reduce the power level of the heating element structure by one level, and return to S83 after the second preset time t3. S85: Increase the power level of the burner by one level, increase the power level of the electric heating tube structure by one level, and return to S83 after the second preset time t3; Where t2 < t0, t3 < t0, the first temperature detector (151) is located at the upper part of the cooking cavity (10), and the second temperature detector (152) is located at the lower part of the cooking cavity (10).

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