A control method for a double-fan oven and a double-fan oven

Abstract

The present application relates to a kind of control method and double fan oven for double fan oven, food weight m includes m1, m2, m3 three weight grades, and m1>m2>m3, the placement height of the cooking utensil corresponding to m1, m2, m3 is A, B, C respectively, and C>B>A, and if food weight m≥m1, cooking utensil is located below A;If food weight m2<m<m1, cooking utensil is located between A and B;If food weight m=m2, cooking utensil is located at B;If food weight m3<m<m2, cooking utensil is located between B and C;If food weight m≤m3, cooking utensil is located above C;The rotating speed of each hot blast fan includes low speed N1 and high speed N2 respectively, the heating mode of each heating tube includes simultaneous opening and closing and intermittent opening and closing, and the air volume ratio and heat ratio at the place of cooking utensil are always maximum.The present application can make the air volume ratio and heat ratio at the place of cooking food always maximum, so as to guarantee cooking efficiency and cooking effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of cooking equipment, in particular to a control method for a double-fan oven and a double-fan oven. BACKGROUND

[0002] The double-fan oven generally has two hot air fans arranged on the upper and lower sides of the rear side of the oven liner, and the two hot air fans work simultaneously during the baking process. Compared with the single-fan oven, the circulating air volume of the double-fan oven is large enough, and the hot air can reach the door body and then return from the center, covering all the surfaces of the food. For example, Chinese invention patent No. ZL201921884367.9 (authorized announcement No. CN212186197U) “Double-fan oven liner structure and oven with the liner structure”, Chinese invention patent No. ZL202110119175.4 (authorized announcement No. CN112901530B) “Hot air fan for cooking device and double-fan oven”, etc.

[0003] Further, the existing double-fan oven also includes a top heating pipe arranged on the top surface of the liner, a bottom heating pipe arranged on the bottom surface of the liner, an upper back heating pipe, and a lower back heating pipe, wherein the upper back heating pipe is arranged around the outer periphery of the impeller of the upper hot air fan, and the lower back heating pipe is arranged around the outer periphery of the impeller of the lower hot air fan. The food to be cooked is placed on the cooking utensil (such as a baking tray, etc.), the cooking utensil is horizontally pushed into the liner before the cooking starts, and then the cooking program is started.

[0004] During use, the placement height of food with different weights in the liner is unchanged (generally placed on the second layer when single-layer baking), and the heating mode is fixed (the working mode of each hot air fan and heating pipe) under the same menu mode, without corresponding adjustment according to the different weights of the food, thereby limiting the cooking effect of the double-fan oven and failing to obtain further improvement. SUMMARY

[0005] The first technical problem to be solved by the present application is to provide a control method for a double-fan oven with high cooking efficiency and good cooking effect.

[0006] The second technical problem to be solved by the present application is to provide a double-fan oven applying the control method of the double-fan oven.

[0007] The technical scheme adopted by the present application to solve the first technical problem is as follows: a control method for a double-fan oven, the double-fan oven comprising an inner container, the rear side of the inner container being provided with a first hot air fan and a second hot air fan located below the first hot air fan, wherein the outer periphery of a first fan of the first hot air fan is provided with a first back heating pipe, the outer periphery of a second fan of the second hot air fan is provided with a second back heating pipe, and a top heating pipe is installed on the inner top surface of the inner container and a bottom heating pipe is installed on the bottom of the inner container, characterized in that,

[0008] The food weight m comprises three weight levels m1, m2 and m3, and m1>m2>m3, the placement heights of the cooking utensils corresponding to m1, m2 and m3 in the inner container are A, B and C respectively, and C>B>A, and:

[0009] If the food weight m is greater than or equal to m1, the cooking utensil is located below A;

[0010] If the food weight m2

[0011] If the food weight m is equal to m2, the cooking utensil is located at B;

[0012] If the food weight m3

[0013] If the food weight m is less than or equal to m3, the cooking utensil is located above C;

[0014] The rotation speeds of each hot air fan respectively comprise a low rotation speed N1 and a high rotation speed N2, the heating modes of each heating pipe comprise simultaneous opening and closing and intermittent opening and closing, and the air volume ratio and the heat ratio at the location of the cooking utensil are always maximum.

[0015] Further, the maximum power of the double-fan oven is Pmax,

[0016] In the preheating stage, if the cooking utensil is located below A or between A and B, the first hot air fan and the second hot air fan are rotated at the rotation speed N2,

[0017] And if the total power P of the first back heating pipe, the second back heating pipe and the bottom heating pipe is greater than Pmax, the first back heating pipe and the second back heating pipe are simultaneously turned on, otherwise, the first back heating pipe, the second back heating pipe and the bottom heating pipe are simultaneously turned on. On the basis of avoiding exceeding the maximum power of the double-fan oven, the temperature rising speed of the inner container is maximized, and the air volume ratio and the heat ratio at the location of the cooking utensil are maximized.

[0018] Further, the maximum power of the double-fan oven is Pmax,

[0019] In the preheating stage, if the cooking utensil is located at B or between B and C, both the first and second hot air fans rotate at the speed N2,

[0020] And, if the total power P of the first back heating tube, the second back heating tube and the top heating tube is greater than Pmax, the first back heating tube and the second back heating tube are turned on at the same time, otherwise, the first back heating tube, the second back heating tube and the top heating tube are turned on at the same time. On the basis of avoiding exceeding the maximum power of the double-fan oven, the temperature rising speed of the inner container is maximized, and the air volume ratio and heat ratio at the location of the cooking utensil are maximized.

[0021] Further, the maximum power of the double-fan oven is Pmax,

[0022] In the preheating stage, if the cooking utensil is located above C, both the first and second hot air fans rotate at the speed N2,

[0023] And, if the total power P of the first back heating tube, the second back heating tube and the top heating tube is greater than Pmax, the first back heating tube and the top heating tube are turned on at the same time, otherwise, the first back heating tube, the second back heating tube and the top heating tube are turned on at the same time. On the basis of avoiding exceeding the maximum power of the double-fan oven, the temperature rising speed of the inner container is maximized, and the air volume ratio and heat ratio at the location of the cooking utensil are maximized

[0024] Further, in the countdown stage, when the temperature inside the inner container has tended to be stable, if the set temperature T of the inner container is greater than or equal to D (i.e. the set temperature is high, and the intermittent heating of the single heating tube is not enough to maintain the temperature inside the inner container, so the double heating tubes need to be turned on continuously; the same below, which will not be repeated here), and the cooking utensil is located below A or between A and B,

[0025] And, if the cumulative heating time t1 of the bottom heating tube is greater than or equal to D1, the second hot air fan rotates at the speed N2 and the first hot air fan rotates at the speed N1, and the first back heating tube and the second back heating tube are turned on at the same time.

[0026] If the cumulative heating time t1 of the bottom heating tube is less than D1, the second hot air fan rotates at the speed N2 and the first hot air fan does not rotate, and the second back heating tube and the bottom heating tube are turned on at the same time. The heating time of the bottom heating tube is limited, which can reduce the bottom temperature rise of the double-fan oven on the one hand, and can avoid the food bottom from being colored too dark on the other hand. The following technical effects of limiting the heating time of the bottom heating tube are the same as this, and will not be repeated here.

[0027] Further, in the countdown stage, if the set temperature T of the inner container is greater than or equal to D, and the cooking utensil is located at B or between B and C, the first hot air fan rotates at the speed N2 and the second hot air fan rotates at the speed N1, and the first back heating tube and the second back heating tube are turned on at the same time.

[0028] Further, in the countdown phase, if the inner container set temperature T≥D, and the cooking utensil is located above C,

[0029] The first hot air machine rotates at speed N2 and the second hot air machine does not rotate, the first back heating tube and the top heating tube are simultaneously turned on.

[0030] Further, in the countdown phase, if the inner container set temperature T<D, and the cooking utensil is located below A,

[0031] The second hot air machine rotates at speed N2 and the first hot air machine does not rotate, and if the bottom heating tube cumulative heating time t1≥D1, the second back heating tube is turned on.

[0032]

[0033] If the bottom heating tube cumulative heating time t1<D1, the second back heating tube and the bottom heating tube are intermittently turned on.

[0034] Further, in the countdown phase, if the inner container set temperature T<D, and if the cooking utensil is located between A and B,

[0035] The second hot air machine rotates at speed N2 and the first hot air machine is intermittently turned on with the first back heating tube at speed N1,

[0036] When the bottom heating tube cumulative heating time t1≥D1, the first back heating tube and the second back heating tube are intermittently turned on.

[0037] When the bottom heating tube cumulative heating time t1<D1, the first back heating tube, the second back heating tube and the bottom heating tube are intermittently turned on.

[0038] Further, in the countdown phase, if the inner container set temperature T<D, and if the cooking utensil is located at B,

[0039] The second hot air machine and the first hot air machine rotate at speed N2 respectively, and the first back heating tube and the second back heating tube are intermittently turned on.

[0040] Further, in the countdown phase, if the inner container set temperature T<D, and if the cooking utensil is located between B and C, the first hot air machine rotates at speed N2 and the second hot air machine is intermittently turned on with the second back heating tube at speed N1, and the first back heating tube, the second back heating tube and the top heating tube are intermittently turned on.

[0041] Further, in the countdown phase, if the inner container set temperature T<D, and if the cooking utensil is located above C,

[0042] The first hot air machine rotates at speed N2 and the second hot air machine does not rotate, and the second back heating tube and the top heating tube are intermittently turned on.

[0043] ​Further, during the cooking process, the height of the cooking utensil changes with the change of the food weight. Thus, in addition to adjusting the height of the cooking utensil in the inner container according to the food weight at the beginning of the cooking, the height of the cooking utensil is also adjusted according to the change of the food weight during the cooking, so that dynamic adjustment of the height of the cooking utensil during the whole cooking process is realized, and the cooking efficiency and the cooking effect of the food are further improved.

[0044] To further solve the second technical problem, the technical solution adopted is: a double-fan oven characterized in application of the control method for the double-fan oven.

[0045] Compared with the prior art, the advantages of the present application are that in the present application, the food weight is different, and the height of the cooking utensil in the inner container is also different, and the rotation speed of each hot air fan and the heating mode of each heating pipe are controlled, so that the air volume ratio and the heat ratio at the position of the cooking utensil are always maximum, thereby ensuring the cooking efficiency and the cooking effect. BRIEF DESCRIPTION OF DRAWINGS

[0046] Figure 1 The structure schematic diagram of the double-fan oven in the embodiment of the present application is shown in the figure.

[0047] Figure 2 The structure schematic diagram of the double-fan oven in the embodiment of the present application is shown in the figure. Figure 1 The enlarged view of part A in the figure.

[0048] Figure 3 The partial structure exploded view of the double-fan oven in the embodiment of the present application is shown in the figure. DETAILED DESCRIPTION

[0049] The present application will be further described in detail below with reference to the embodiments of the drawings.

[0050] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation. Since the disclosed embodiments of the present application can be arranged in different directions, these orientation-indicating terms are only illustrative and should not be considered as limiting. For example, "upper" and "lower" do not necessarily mean the direction opposite or consistent with the direction of gravity. In addition, the features defined as "first" and "second" can be explicitly or implicitly included one or more features.

[0051] As shown in Figures 1 to 3 A double-fan oven, comprising an inner container 1, a first hot air fan 4 and a second hot air fan 5 located below the first hot air fan 4 are arranged at the back side of the inner container 1. The outer periphery of the first fan 41 of the first hot air fan 4 is provided with a circular first back heating pipe 63, and the outer periphery of the second fan 51 of the second hot air fan 5 is provided with a circular second back heating pipe 64. A top heating pipe 61 is installed on the inner top surface of the inner container 1, and a bottom heating pipe 62 is installed on the bottom of the inner container 1. In addition, a hot air baffle 3 is arranged at the back side of the inner cavity of the inner container 1. The hot air baffle 3 and the back plate of the inner container 1 form a hot air chamber (not shown). The first fan 41 of the first hot air fan 4 and the second fan 51 of the second hot air fan 5 are located in the hot air chamber. The hot air baffle 3 is provided with a first air inlet 31 and a first air outlet 33 corresponding to the first hot air fan 4, and a second air inlet 32 and a second air outlet 34 corresponding to the second hot air fan 5.

[0052] Further, the double-fan oven applies the following control method: the food weight m includes three weight levels m1, m2 and m3, and m1>m2>m3. The placement height of the cooking utensil (specifically a baking tray in this embodiment) corresponding to m1, m2 and m3 in the inner container 1 is A, B and C respectively, and C>B>A, and:

[0053] If the food weight m≥m1, the cooking utensil is located below A;

[0054] If the food weight m2<m<m1, the cooking utensil is located between A and B;

[0055] If the food weight m=m2, the cooking utensil is located at B;

[0056] If the food weight m3<m<m2, the cooking utensil is located between B and C;

[0057] If the food weight m≤m3, the cooking utensil is located above C.

[0058] The maximum power of the double-fan oven is Pmax. The heating power of the first back heating pipe 63, the second back heating pipe 64, the top heating pipe 61 and the bottom heating pipe 62 when they are turned on at the same time is greater than Pmax, so the four heating pipes cannot be turned on at the same time. The rotation speed of each hot air fan includes a low speed N1 and a high speed N2. The heating mode of each heating pipe includes simultaneous opening and closing and intermittent opening and closing. The air volume ratio and the heat ratio at the location of the cooking utensil are always the maximum. The simultaneous opening and closing means that each heating pipe is turned on and heated at the same time and then stopped at the same time. The intermittent opening means that one is turned on and the other is turned off. The heating time of each heating pipe is obtained according to the internal software PID calculation.

[0059] The food weight is different in the present application, and the placement height of the cooking utensil in the inner container 1 is also different. The rotation speed of each hot air blower and the heating mode of each heating pipe are controlled to maximize the air volume ratio and heat ratio at the location of the cooking utensil, thereby ensuring the cooking efficiency and cooking effect. Preferably, the height of the cooking utensil changes with the change of the food weight m during the cooking process. For example, during the cooking process, if there is no additional material, the position of the cooking utensil will move from bottom to top (mainly due to the loss of water during the cooking process), and if additional material is needed during the cooking process, the position of the cooking utensil will also change before and after the additional material is added. In this way, in addition to adjusting the height of the cooking utensil in the inner container 1 according to the food weight m at the beginning of the cooking process, the height of the cooking utensil can also be adjusted according to the change of the food weight m during the cooking process, achieving dynamic adjustment of the height of the cooking utensil according to the change of the food weight during the entire cooking process, and further improving the cooking efficiency and cooking effect of the food.

[0060] Further, in the present embodiment, the left and right side walls of the inner container 1 are respectively provided with side supports 2 for supporting the cooking utensil. Each of the side supports 2 includes a resting rack 21 arranged horizontally in the front-rear direction and used for placing the cooking utensil. Each of the side supports 2 further includes a mounting cross beam 22 fixed to the left and right side walls of the inner container 1 and corresponding to each resting rack 21. Each mounting cross beam 22 extends in the front-rear direction and is located above the corresponding resting rack 21. A vertically extending tension spring 23 is installed between the front end of each mounting cross beam 22 and the front end of the corresponding resting rack 21, and between the rear end of each mounting cross beam 22 and the rear end of the corresponding resting rack 21. When the two resting racks 21 move downward synchronously, each tension spring 23 is stretched and causes the two resting racks 21 to have a tendency to move upward synchronously. Thus, the resting racks 21 are stably arranged on the inner container 1, and when the pressure on the resting racks 21 decreases, the two resting racks 21 can move upward synchronously. Thus, the greater the weight of the food placed on the cooking utensil, the smaller the height of the cooking utensil, and the smaller the weight of the food, the greater the height of the cooking utensil. In the initial state, the height of the cooking utensil is above C, and when the food weight m = m3, the tension spring 23 is in a natural stretched state.

[0061] Further, each of the shelves 21 has a shelf bar 211 extending front to back and for the plate of the cooking utensil to rest on and a connecting cross bar 212, and the front and rear ends of each of the connecting cross bars 212 are fixed to the corresponding ends of the corresponding shelf bar 211 through left and right extending guide rods 213. In addition, the left and right side walls of the inner container 1 are also respectively vertically fixed with guide blocks 24, each of the guide blocks 24 is a hollow structure, and a first guide hole 241 and a second guide hole 242 are respectively formed in the length direction of the adjacent side walls of each of the guide blocks 24, wherein the first guide hole 241 is provided for the corresponding guide rod 213 to pass through, and the second guide hole 242 is provided for the corresponding connecting cross bar 212 to pass through and move up and down. By arranging the guide blocks 24, the two side shelves 21 can move up and down more stably.

[0062] Further, in the control method of the present application, the cooking process of the double-fan oven includes a preheating stage and a countdown stage, wherein in the preheating stage, the temperature rising speed of the inner container 1 is maximized on the basis of avoiding exceeding the maximum power Pmax of the double-fan oven, and in the countdown stage, the temperature inside the inner container 1 has tended to be stable.

[0063] Specifically, in the preheating stage (maximizing the temperature rising speed of the inner container 1 on the basis of avoiding exceeding the maximum power Pmax of the double-fan oven, and maximizing the air volume ratio and heat ratio at the location of the cooking utensil):

[0064] (1) If the cooking utensil is located below A or between A and B, the first and second hot air fans 4 and 5 are all rotating at the speed N2. And if the total power P of the first and second back heating pipes 63 and 64 and the bottom heating pipe 62 is greater than Pmax, the first and second back heating pipes 63 and 64 are turned on at the same time, otherwise, the first, second back heating pipes 63 and 64 and the bottom heating pipe 62 are turned on at the same time.

[0065] (2) If the cooking utensil is located at B or between B and C, the first and second hot air fans 4 and 5 are all rotating at the speed N2. And if the total power P of the first and second back heating pipes 63 and 64 and the top heating pipe 61 is greater than Pmax, the first and second back heating pipes 63 and 64 are turned on at the same time, otherwise, the first, second back heating pipes 63 and 64 and the top heating pipe 61 are turned on at the same time.

[0066] (3) If the cooking utensil is located above C, the first and second hot air fans 4 and 5 are all rotating at the speed N2, and if the total power P of the first and second back heating pipes 63 and 64 and the top heating pipe 61 is greater than Pmax, the first back heating pipe 63 and the top heating pipe 61 are turned on at the same time, otherwise, the first, second back heating pipes 63 and 64 and the top heating pipe 61 are turned on at the same time.

[0067] Further, in the countdown phase (at this time, the temperature inside the inner container 1 has tended to be stable), if the set temperature T of the above-mentioned inner container 1 is greater than or equal to D, that is, the set temperature is relatively high, intermittent heating of the single heating pipe is insufficient to maintain the temperature inside the inner container 1, and the double heating pipes need to be continuously turned on:

[0068] (1) If the cooking utensil is located below A or between A and B, and if the cumulative heating time tl of the bottom heating pipe 62 is greater than or equal to D1, the second hot air machine 5 rotates at a speed of N2 and the first hot air machine 4 rotates at a speed of N1, and the first back heating pipe 63 and the second back heating pipe 64 are turned on at the same time.

[0069] If the cumulative heating time tl of the bottom heating pipe 62 is less than D1, the second hot air machine 5 rotates at a speed of N2 and the first hot air machine 4 does not rotate, and the second back heating pipe 64 and the bottom heating pipe 62 are turned on at the same time. Limiting the heating time of the bottom heating pipe 62 can reduce the bottom temperature rise of the double-fan oven, and can also avoid the food bottom from being colored too dark.

[0070] (2) If the cooking utensil is located at B or between B and C, the first hot air machine 4 rotates at a speed of N2 and the second hot air machine 5 rotates at a speed of N1, and the first back heating pipe 63 and the second back heating pipe 64 are turned on at the same time.

[0071] (3) If the cooking utensil is located above C, the first hot air machine 4 rotates at a speed of N2 and the second hot air machine 5 does not rotate, and the first back heating pipe 63 and the top heating pipe 61 are turned on at the same time.

[0072] Further, in the countdown phase (at this time, the temperature inside the inner container 1 has tended to be stable), if the set temperature T of the above-mentioned inner container 1 is less than D, that is, the set temperature is relatively low, intermittent heating of the single heating pipe is sufficient to maintain the temperature inside the inner container 1:

[0073] (1) If the cooking utensil is located below A, the second hot air machine 5 rotates at a speed of N2 and the first hot air machine 4 does not rotate, and if the cumulative heating time tl of the bottom heating pipe 62 is greater than or equal to D1, the second back heating pipe 64 is turned on.

[0074] If the cumulative heating time tl of the bottom heating pipe 62 is less than D1, the second back heating pipe 64 and the bottom heating pipe 62 are intermittently turned on.

[0075] (2) If the cooking utensil is located between A and B, the second hot air machine 5 rotates at a speed of N2, the first hot air machine 4 is intermittently turned on with the first back heating pipe 63 and rotates at a speed of N1.

[0076] When the cumulative heating time tl of the bottom heating pipe 62 is greater than or equal to D1, the first back heating pipe 63 and the second back heating pipe 64 are intermittently turned on.

[0077] When the accumulated heating time t1 of the bottom heating pipe 62 is less than D1, the first back heating pipe 63, the second back heating pipe 64 and the bottom heating pipe 62 are intermittently turned on.

[0078] (3) If the cooking utensil is located at B, the second hot air blower 5 and the first hot air blower 4 rotate at a speed of N2 respectively, and the first back heating pipe 63 and the second back heating pipe 64 are intermittently turned on.

[0079] (4) If the cooking utensil is located above C, the first hot air blower 4 rotates at a speed of N2 and the second hot air blower 5 does not rotate, and the second back heating pipe 64 and the top heating pipe 61 are intermittently turned on.

[0080] It can be seen that, by judging the position of the cooking utensil in the inner container 1, the start and stop of each hot air blower, the rotating speed and the heating mode of each heating pipe are controlled under the premise of not exceeding the maximum power of the oven and the longest working time limit of the bottom heating pipe 62, so that the air volume ratio and the heat ratio at the food are always kept maximum, and the cooking efficiency and the cooking effect on the food are improved.

Claims

1. A control method for a dual-fan oven, the dual-fan oven comprising an inner cavity (1), wherein a first hot air fan (4) is disposed on the rear side of the inner cavity (1) and a second hot air fan (5) located below the first hot air fan (4), wherein, The first hot air blower (4) has a first back heating pipe (63) arranged around the outer periphery of the first fan (41), and the second hot air blower (5) has a second back heating pipe (64) arranged around the outer periphery of the second fan (51). Furthermore, a top heating pipe (61) is installed on the inner top surface of the inner liner (1), and a bottom heating pipe (62) is installed on the bottom of the inner liner (1). The characteristic feature is that... The food weight m includes three weight classes: m1, m2, and m3, where m1 > m2 > m3. The cooking utensils corresponding to m1, m2, and m3 are placed at heights A, B, and C in the inner pot 1, respectively, where C > B > A. Furthermore: If the weight of the food m ≥ m1, the cooking utensil is located below A; If the weight of the food m2 < m < m1, the cooking utensil is located between A and B; If the weight of the food is m = m2, and the cooking utensil is located at point B; If the weight of the food m3 < m < m2, the cooking utensil is located between B and C; If the food weight m ≤ m3, the cooking utensil is located above C; Each hot air blower has a rotation speed of low speed N1 and a rotation speed of high speed N2. The heating methods of each heating element include simultaneous on / off and intermittent on / off. Furthermore, the airflow ratio and heat ratio at the location of the cooking appliances are always at their maximum.

2. The control method for a dual-fan oven as described in claim 1, characterized in that, The maximum power of the dual-fan oven is Pmax. During the preheating stage, if the cooking appliance is located below A or between A and B, both the first hot air blower (4) and the second hot air blower (5) rotate at a speed of N2. Furthermore, if the total power P of the first back heating tube (63), the second back heating tube (64), and the bottom heating tube (62) is greater than Pmax, then the first back heating tube (63) and the second back heating tube (64) are turned on simultaneously; otherwise, the first back heating tube (63), the second back heating tube (64), and the bottom heating tube (62) are turned on simultaneously.

3. The control method for a dual-fan oven as described in claim 1 or 2, characterized in that, The maximum power of the dual-fan oven is Pmax. During the preheating stage, if the cooking appliance is located at point B or between B and C, both the first hot air blower (4) and the second hot air blower (5) rotate at a speed of N2. Furthermore, if the total power P of the first back heating tube (63), the second back heating tube (64), and the top heating tube (61) is greater than Pmax, then the first back heating tube (63) and the second back heating tube (64) are turned on simultaneously; otherwise, the first back heating tube (63), the second back heating tube (64), and the top heating tube (61) are turned on simultaneously.

4. The control method for a dual-fan oven as described in claim 1 or 2, characterized in that, The maximum power of the dual-fan oven is Pmax. During the preheating stage, if the cooking appliance is located above C, both the first hot air blower (4) and the second hot air blower (5) rotate at a speed of N2. Furthermore, if the total power P of the first back heating tube (63), the second back heating tube (64), and the top heating tube (61) is greater than Pmax, the first back heating tube (63) and the top heating tube (61) are turned on simultaneously; otherwise, the first back heating tube (63), the second back heating tube (64), and the top heating tube (61) are turned on simultaneously.

5. The control method for a dual-fan oven as described in claim 1, characterized in that, During the countdown phase, if the inner pot (1) is set to a temperature T ≥ D, and the cooking appliance is located below A or between A and B, Furthermore, if the cumulative heating time t1 of the bottom heating tube (62) is greater than or equal to D1, then the second hot air blower (5) rotates at a speed of N2 while the first hot air blower (4) rotates at a speed of N1, and the first back heating tube (63) and the second back heating tube (64) are turned on simultaneously. If the cumulative heating time t1 of the bottom heating tube (62) is less than D1, then the second hot air blower (5) rotates at a speed of N2 while the first hot air blower (4) does not rotate, and the second back heating tube (64) and the bottom heating tube (62) are turned on at the same time.

6. The control method for a dual-fan oven as described in claim 1 or 5, characterized in that, During the countdown phase, if the inner pot (1) is set to a temperature T ≥ D, and the cooking appliance is located at point B or between B and C, The first hot air blower (4) rotates at a speed of N2 while the second hot air blower (5) rotates at a speed of N1. The first back heating tube (63) and the second back heating tube (64) are turned on at the same time.

7. The control method for a dual-fan oven as described in claim 1 or 5, characterized in that, During the countdown phase, if the inner pot (1) is set to a temperature T ≥ D, and the cooking appliance is located above C, The first hot air blower (4) rotates at a speed of N2 while the second hot air blower (5) does not rotate, and the first back heating tube (63) and the top heating tube (61) are turned on at the same time.

8. The control method for a dual-fan oven as described in claim 1, characterized in that, During the countdown phase, if the inner pot (1) is set to a temperature T < D, and the cooking appliance is located below A, Then the second hot air blower (5) rotates at a speed of N2 while the first hot air blower (4) does not rotate. Furthermore, if the cumulative heating time t1 of the bottom heating tube (62) is greater than or equal to D1, then the second back heating tube (64) will be turned on. If the cumulative heating time t1 of the bottom heating tube (62) is less than D1, the second back heating tube (64) and the bottom heating tube (62) are turned on intermittently.

9. The control method for a dual-fan oven as described in claim 1 or 8, characterized in that, During the countdown phase, if the inner pot (1) is set to a temperature T < D, and if the cooking appliance is located between A and B, The second hot air blower (5) rotates at a speed of N2, and the first hot air blower (4) is intermittently turned on along with the first back heating tube (63) at a speed of N1. When the cumulative heating time t1 of the bottom heating tube (62) is greater than or equal to D1, the first back heating tube (63) and the second back heating tube (64) are turned on intermittently. When the cumulative heating time t1 of the bottom heating tube (62) is less than D1, the first back heating tube (63), the second back heating tube (64) and the bottom heating tube (62) are turned on intermittently.

10. The control method for a dual-fan oven as described in claim 1 or 8, characterized in that, During the countdown phase, if the inner pot (1) is set to a temperature T < D, and if the cooking appliance is located at point B, The second hot air blower (5) and the first hot air blower (4) rotate at a speed of N2 respectively, and the first back heating tube (63) and the second back heating tube (64) are turned on intermittently.

11. The control method for a dual-fan oven as described in claim 1 or 8, characterized in that, During the countdown phase, if the inner pot (1) is set to a temperature T < D, and the cooking appliance is located between B and C, The first hot air blower (4) rotates at a speed of N2, and the second hot air blower (5) is intermittently turned on along with the second back heating tube (64) at a speed of N1. The first back heating tube (63), the second back heating tube (64) and the top heating tube (61) are intermittently turned on.

12. The control method for a dual-fan oven as described in claim 1 or 8, characterized in that, During the countdown phase, if the inner pot (1) is set to a temperature T < D, and the cooking appliance is located above C, The first hot air blower (4) rotates at a speed of N2 while the second hot air blower (5) does not rotate, and the second back heating tube (64) and the top heating tube (61) are turned on intermittently.

13. The control method for a dual-fan oven as described in claim 1, 2, 5, or 8, characterized in that, During the cooking process, the height of the cooking utensil changes with the weight m of the food.

14. A dual-fan oven, characterized in that, The application includes the control method for a dual-fan oven as described in any one of claims 1 to 13.

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