An air fryer and its control method

Abstract

The present invention belongs to the technical field of electrical appliances and relates to an air fryer and a control method thereof; the air fryer includes a housing; a frying basket, which is removably arranged in the housing, and there is a gap between the outer side wall of the frying basket and the inner side wall of the housing to form a cold air sandwich layer; a grille assembly, which is installed in the housing and located at the top of the frying basket, the grille assembly includes a first grille and a second grille, the first grille and the second grille are coaxially connected, and cold air windows and hot air windows are provided on both the first grille and the second grille, the hot air windows communicate with the inside of the frying basket, and the cold air windows communicate with the cold air sandwich layer; a fan assembly, which is installed in the housing, and the fan assembly is used for blowing air towards the cold air windows and the hot air windows; wherein, when the first grille and the second grille rotate relative to each other to the first position, the cold air windows are opened and the hot air windows are closed; when the first grille and the second grille rotate relative to each other to the second position, the hot air windows are opened and the cold air windows are closed. The air fryer of the present invention can avoid scalding hands, and has low cost and simple structure.

Description

Technical Field

[0001] The present invention belongs to the technical field of electrical appliances, and relates to an air fryer and a control method thereof. Background Art

[0002] With the development of the economy and the improvement of people's living quality, it has become difficult to meet people's pursuit of food quality by using traditional cooking utensils to cook food. A new type of cooking utensil called an air fryer has emerged on the market. An air fryer is a machine that can "fry" food with air. It mainly uses air to replace the hot oil in the original frying pan to cook the food; at the same time, the hot air also blows away the moisture on the surface of the food, making the ingredients achieve an effect similar to frying.

[0003] Currently, an air fryer usually places food in a frying basket, and then heats the food in the frying basket at a high temperature to cook the food, and finally takes out the frying basket and takes the food in the frying basket. However, after the air fryer is used, the temperature of the inner and outer surfaces of the frying basket is too high. When the user takes out the food from the frying basket, it is easy to scald the hand, posing a safety hazard. In the prior art, in order to solve the problem of hot hands, a cold air fan and a hot air fan are configured in the air fryer. The hot air fan is used to heat the food at a high temperature, and the cold air fan is used to cool the inside of the air fryer. However, this method requires an additional cold air fan, resulting in high costs, complex structures, and large product volumes. Summary of the Invention

[0004] In view of this, the present invention provides an air fryer and a control method thereof, aiming to solve the problems of high costs, complex structures, and large product volumes caused by adding a cold air fan to cool the existing air fryer.

[0005] To solve the above problems, according to one aspect of the present application, an embodiment of the present invention provides an air fryer, including: a housing; a frying basket removably disposed in the housing, with a gap between the outer side wall of the frying basket and the inner side wall of the housing to form a cold air sandwich; a grille assembly installed in the housing and located at the top of the frying basket, the grille assembly including a first grille and a second grille, the first grille and the second grille being coaxially connected, and both the first grille and the second grille being provided with cold air windows and hot air windows, the hot air windows communicating with the inside of the frying basket, and the cold air windows communicating with the cold air sandwich; a fan assembly installed in the housing, the fan assembly being used to blow air toward the cold air windows and the hot air windows; wherein, when the first grille and the second grille are relatively rotated to a first position, the cold air windows are opened and the hot air windows are closed; when the first grille and the second grille are relatively rotated to a second position, the hot air windows are opened and the cold air windows are closed.

[0006] In some embodiments, the first grille and the second grille are overlapped, and both the first grille and the second grille include a bottom wall and side walls surrounding the bottom wall. The hot air window is formed in the bottom wall, and the cold air window is formed in the side walls. When the first grille and the second grille are rotated relative to each other to a first position, the cold air windows overlap and the hot air windows are staggered. When the first grille and the second grille are rotated relative to each other to a second position, the hot air windows overlap and the cold air windows are staggered.

[0007] In some embodiments, the hot air windows are arranged at intervals along the circumferential direction of the bottom wall.

[0008] In some embodiments, the hot air window gradually widens from the center of the bottom wall to the edge.

[0009] In some embodiments, the fan assembly includes axial flow blades, and the side walls surround the circumferential side of the axial flow blades. The cold air windows are arranged at intervals along the circumferential direction of the side walls.

[0010] In some embodiments, the air fryer further includes a lifting assembly and a partition. The lifting assembly is installed in the frying basket, the lifting assembly is connected to the partition, and the lifting assembly is used to drive the partition to lift and lower.

[0011] In some embodiments, along the insertion direction of the button, the inner diameter of the button hole gradually becomes smaller, and there is an interference fit between the button and the button hole.

[0012] In some embodiments, the lifting assembly includes a motor and a telescopic rod. The motor is drivingly connected to the telescopic rod to drive the telescopic rod to extend and retract, and the partition is connected to the end of the telescopic rod.

[0013] In some embodiments, the frying basket includes an outer wall and an inner wall, and there is a gap between the outer wall and the inner wall, so that a vacuum layer is formed between the outer wall and the inner wall.

[0014] In some embodiments, the air fryer further includes a solenoid valve switch, and the solenoid valve switch is installed between the frying basket and the housing.

[0015] To solve the above problems, according to another aspect of the present application, embodiments of the present invention provide a control method for an air fryer, including: if it is detected that the air fryer stops heating, controlling the first grille and the second grille to rotate relative to each other to open the cold air window; if it is detected that the current temperature drops below a preset temperature threshold, controlling the fan assembly to stop rotating and driving the lifting assembly to lift the partition; if it is detected that the food on the partition is lifted to a preset height, controlling the solenoid valve switch to open.

[0016] Compared with the prior art, the air fryer of the present invention has at least the following beneficial effects:

[0017] By coaxially connecting the first grille and the second grille, both the first grille and the second grille are provided with cold air windows and hot air windows. The hot air windows communicate with the inside of the frying basket, and the cold air windows communicate with the cold air interlayer. When the first grille and the second grille rotate relative to each other to the first position, the cold air windows are opened and the hot air windows are closed, and the air flow blown by the fan assembly flows from the cold air windows to the cold air interlayer to achieve cold air circulation cooling; when the first grille and the second grille rotate relative to each other to the second position, the hot air windows are opened and the cold air windows are closed, and the air flow blown by the fan assembly flows from the hot air windows to the inside of the frying basket to achieve high-temperature heating of the food; thus, by the relative rotation of the first grille and the second grille, the fan assembly can not only heat the food by hot air circulation, but also reduce the surface temperature of the frying basket by cold air circulation, without adding a cold fan, and has a simple structure, low cost, does not occupy space, and the product has a small volume.

[0018] On the other hand, the control method of the air fryer provided by the present invention is designed based on the above air fryer, and its beneficial effects can be referred to the beneficial effects of the above air fryer, and will not be elaborated here one by one.

[0019] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly and to be implemented in accordance with the content of the specification, the following describes in detail with reference to the preferred embodiments of the present invention and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 is an exploded view of the air fryer provided by the embodiment of the present invention;

[0022] Figure 2 is a schematic diagram of the air fryer provided by the embodiment of the present invention;

[0023] Figure 3 is a cross-sectional view of the air fryer provided by the embodiment of the present invention;

[0024] Figure 4 is Figure 3 a partial enlarged view of part A in

[0025] Figure 5 is a schematic diagram of the first grille and the second grille of the air fryer provided by the embodiment of the present invention;

[0026] Figure 6 is a cross-sectional view of an air fryer provided by an embodiment of the present invention;

[0027] Figure 7 is a schematic diagram of the air flow direction of an air fryer provided by an embodiment of the present invention;

[0028] Figure 8 is a schematic flow chart of a control method for an air fryer provided by an embodiment of the present invention;

[0029] Reference numerals:

[0030] 10, housing; 11, upper cavity; 12, lower cavity; 13, cold air sandwich; 14, access opening; 20, frying basket; 21, vacuum layer; 22, outer wall; 23, inner wall; 30, grille assembly; 31, first grille; 32, second grille; 33, bottom wall; 331, hot air window; 34, side wall; 341, cold air window; 40, fan assembly; 50, lifting assembly; 60, partition; 70, solenoid valve switch. Detailed embodiments

[0031] To further elaborate on the technical means and effects adopted by the present invention to achieve the intended invention purpose, the following describes in detail the specific embodiments, structures, features, and their effects of the present invention application in combination with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "embodiment" does not necessarily refer to the same embodiment. In addition, the specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0032] In the description of the present invention, it should be clear that the terms "first", "second", etc. in the specification and claims of the present invention and the above drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence; the terms "vertical", "horizontal", "longitudinal", "front", "rear", "left", "right", "up", "down", "horizontal", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention, rather than meaning that the device or element referred to must have a specific orientation or position, so it cannot be understood as a limitation to the present invention.

[0033] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" 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 directly connected or indirectly connected through an intermediate medium. 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.

[0034] Embodiment 1

[0035] This embodiment provides an air fryer. As shown in Figure 1-7 , the air fryer includes: a housing 10, a frying basket 20, a grille assembly 30, and a fan assembly 40; the frying basket 20 is removably disposed in the housing 10, and there is a gap between the outer sidewall 34 of the frying basket 20 and the inner sidewall 34 of the housing 10 to form a cold air interlayer 13; the grille assembly 30 is installed in the housing 10 and located at the top of the frying basket 20. The grille assembly 30 includes a first grille 31 and a second grille 32. The first grille 31 and the second grille 32 are coaxially connected. Cold air windows 341 and hot air windows 331 are provided on both the first grille 31 and the second grille 32. The hot air windows 331 communicate with the inside of the frying basket 20, and the cold air windows 341 communicate with the cold air interlayer 13; the fan assembly 40 is installed in the housing 10, and the fan assembly 40 is used to blow air toward the cold air windows 341 and the hot air windows 331; wherein, when the first grille 31 and the second grille 32 are relatively rotated to a first position, the cold air windows 341 are opened and the hot air windows 331 are closed; when the first grille 31 and the second grille 32 are relatively rotated to a second position, the hot air windows 331 are opened and the cold air windows 341 are closed.

[0036] By implementing this embodiment, the relative rotation of the first grille 31 and the second grille 32 is utilized to enable the fan assembly 40 to not only circulate hot air to heat food, but also circulate cold air to reduce the surface temperature of the frying basket 20. There is no need to additionally provide a cold fan, and the structure is simple, the cost is low, it does not occupy space, and the product volume is small.

[0037] Referring to Figure 1 , Figure 2 , and Figure 6 , specifically, the housing 10 is integrally in a rectangular structure. The interior of the housing 10 is divided into two cavities, namely an upper cavity 11 and a lower cavity 12. The upper cavity 11 is used to install the fan assembly 40 and the grille assembly 30, and the lower cavity 12 is used to accommodate the frying basket 20. The upper cavity 11 and the lower cavity 12 communicate with each other. Wherein, an access opening 14 is provided on the side of the housing 10. The access opening 14 penetrates the lower cavity 12, and the frying basket 20 is removably disposed in the lower cavity 12. The frying basket 20 is integrally in a box structure with an opening. Food is put into the frying basket 20 from the opening. A handle is provided on the outside of the frying basket 20 to facilitate the user to take and place the frying basket 20. When the frying basket 20 enters the lower cavity 12 from the access opening 14, the frying basket 20 forms an integral body with the housing 10. The frying basket 20 and the lower cavity 12 can be set to be slidably connected. For example, a connection method of a guide rail and a slider is adopted, so that the frying basket 20 can be pulled in and out of the access opening 14, which is convenient to use. Of course, it can be understood that other structures can also be used, which are not limited herein. ​​​​​​​​

[0038] Reference Figure 3 and Figure 4 When the frying basket 20 is located in the lower cavity 12, the frying basket 20 does not fit tightly against the inner wall of the lower cavity 12. Instead, there is a certain gap between them, so that a cold air layer 13 is formed between the frying basket 20 and the inner wall of the lower cavity 12. The cold air layer 13 is located on the outer surface of the frying basket 20 and the inner surface of the housing 10. When the cold air circulates in the cold air layer 13, on the one hand, it can cool down the frying basket 20 to avoid the frying basket 20 being too hot to touch, and on the other hand, it can cool down the housing 10 to improve the heat dissipation capacity of the housing 10 and avoid the high temperature of the housing 10 affecting the user experience.

[0039] The fan assembly 40 can adopt an axial flow fan. The axial flow fan includes axial flow blades. The axial flow blades can be suspended on the top of the grille assembly 30 or directly suspended in the grille assembly 30. When the axial flow blades rotate, an air flow can be formed to blow air out of the cold air window 341 or the hot air window 331.

[0040] Reference Figure 5, the grille assembly 30 is disposed above the frying basket 20. The first grille 31 and the second grille 32 have the same shape and structure, and the two as a whole are in the shape of a circular basket. Central holes are provided on both the first grille 31 and the second grille 32, and the central holes of the first grille 31 and the second grille 32 both pass through the same rotating shaft, so as to realize the coaxial connection of the first grille 31 and the second grille 32. The relative rotation of the first grille 31 and the second grille 32 can be achieved in the following several ways. One is that the first grille 31 remains stationary and the second grille 32 rotates, so that the two rotate relatively; another is that the first grille 31 rotates and the second grille 32 remains stationary, so that the two rotate relatively; there is a way that both the first grille 31 and the second grille 32 rotate, and the rotation directions of the two are opposite. For example, the first grille 31 rotates clockwise and the second grille 32 rotates counterclockwise; any one of the above several ways can be adopted in this embodiment, and it is not limited here. In this embodiment, when the first grille 31 and the second grille 32 rotate relatively to the first position, one of the grilles rotates forward by a preset angle. When the first grille 31 and the second grille 32 rotate relatively to the second position, one of the grilles rotates backward by a preset angle. The rotation angles are the same, but only the rotation directions are opposite. In this way, each time of relative rotation, it can stay at the first position and the second position. Or the preset angles of the two rotations are positive and negative relations with each other. For example, +15 degrees and -15 degrees. In this way, it can also make each time of relative rotation stay at the first position and the second position. The control actions of the other two ways are the same, but only the execution logics are different, and it is not limited here. Among them, the opening and closing states of the cold air window 341 and the hot air window 331 are opposite. When the cold air window 341 is in the open state, the hot air window 331 is in the closed state. At this time, the air flow blown out by the fan assembly 40 realizes hot air circulation; when the hot air window 331 is closed, the cold air window 341 is in the open state. At this time, the air flow blown out by the fan assembly 40 realizes cold air circulation. Thus, by using the relative rotation of the two grilles, it can be realized that one fan assembly 40 can both perform hot air circulation and cold air circulation, without adding a cold fan, with a simple structure and low cost.

[0041] Referring to Figure 4 and Figure 5 , in a specific embodiment, the first grille 31 and the second grille 32 are overlapped. Both the first grille 31 and the second grille 32 include a bottom wall 33 and a side wall 34 surrounding the bottom wall 33. The hot air window 331 is opened on the bottom wall 33, and the cold air window 341 is opened on the side wall 34; wherein, when the first grille 31 and the second grille 32 rotate relatively to the first position, the cold air windows 341 overlap and the hot air windows 331 are staggered; when the first grille 31 and the second grille 32 rotate relatively to the second position, the hot air windows 331 overlap and the cold air windows 341 are staggered.

[0042] Referring to Figure 4 , specifically, both the first grille 31 and the second grille 32 are in the shape of a circular basket. The two circular baskets are stacked together. A hot air window 331 is provided at the bottom, and a cold air window 341 is provided on the side. Both the cold air window 341 and the hot air window 331 are air outlet holes, and their shapes can be various, such as circular, rectangular, polygonal, etc., which are not limited herein. The size and shape of the cold air window 341 on the first grille 31 are the same as those of the cold air window 341 on the second grille 32. Similarly, the size and shape of the hot air window 331 on the first grille 31 are the same as those of the hot air window 331 on the second grille 32. Since the first grille 31 and the second grille 32 are stacked together, when the two rotate relative to each other, the cold air window 341 on the first grille 31 and the cold air window 341 on the second grille 32 also rotate accordingly, and the hot air window 331 on the first grille 31 and the hot air window 331 on the second grille 32 also rotate accordingly.

[0043] Referring to Figure 7 , when the first grille 31 and the second grille 32 are in the first position, on the projection of the side wall 34, the cold air window 341 of the first grille 31 overlaps with the cold air window 341 of the second grille 32, that is, the two cold air windows 341 face each other, and the cold air window 341 is in an open state, thereby forming an air outlet for the air flow, so that the air flow formed by the fan assembly 40 can enter the cold air interlayer 13 from the cold air window 341 for cold air circulation; on the projection of the bottom wall 33, the hot air window 331 of the first grille 31 and the hot air window 331 of the second grille 32 are staggered, that is, the hot air window 331 of the first grille 31 is blocked by the bottom wall 33 of the second grille 32, and the hot air window 331 of the second grille 32 is blocked by the bottom wall 33 of the first grille 31. Thus, in the projection direction of the bottom wall 33, the bottom wall 33 is airtight, and the hot air window 331 is in a closed state, so that all the air flow formed by the fan assembly 40 is blown out from the cold air window 341 on the side wall 34. Thereby, by rotating the two grilles relative to each other, a lateral air outlet mode is realized.

[0044] Referring to Figure 7, when the first grille 31 and the second grille 32 are in the second position, on the projection of the bottom wall 33, the hot air windows 331 of the first grille 31 overlap with the hot air windows 331 of the second grille 32, that is, the two hot air windows 331 face each other, and the hot air windows 331 are in an open state, thus forming an air outlet through which air can flow, so that the air flow formed by the fan assembly 40 can enter the inside of the frying basket 20 from the hot air windows 331 for hot air circulation; on the projection of the side wall 34, the cold air windows 341 of the first grille 31 are staggered from the cold air windows 341 of the second grille 32, that is, the cold air windows 341 of the first grille 31 are blocked by the side wall 34 of the second grille 32, and the cold air windows 341 of the second grille 32 are blocked by the side wall 34 of the first grille 31. Furthermore, in the projection direction of the side wall 34, the side wall 34 is airtight, and the cold air windows 341 are in a closed state, so that all the air flow formed by the fan assembly 40 is blown out from the hot air windows 331 on the bottom wall 33. Thus, by the relative rotation of the two grilles, the bottom air outlet mode is realized.

[0045] Continue to refer to Figure 5 , in a specific embodiment, the hot air windows 331 are arranged at intervals along the circumferential direction of the bottom wall 33. Specifically, a plurality of hot air windows 331 are provided, and the plurality of hot air windows 331 are distributed at intervals along the circumferential direction of the bottom wall 33. The area between two adjacent hot air windows 331 belongs to the wind blocking area, and the wind blocking area is used to block the hot air windows 331 on another grille. Therefore, through the circumferential interval distribution of the hot air windows 331, an alternating arrangement of the hot air windows 331 and the wind blocking area can be formed in the circumferential direction, so that wind blocking and air outlet can be realized on the same bottom wall 33.

[0046] Continue to refer to Figure 5 , more specifically, the hot air windows 331 gradually widen from the center of the bottom wall 33 to the edge. That is, the shape of the hot air windows 331 is generally fan-shaped, and a plurality of fan-shaped hot air windows 331 are arranged around the center of the bottom wall 33. The air outlet area of the formed hot air windows 331 is large, so that the heating effect of the hot air circulation is good and the frying efficiency is improved.

[0047] Refer to Figure 6, in a specific embodiment, the fan assembly 40 includes an axial-flow impeller. The side wall 34 surrounds the circumferential side of the axial-flow impeller, and the cold air windows 341 are arranged at intervals along the circumferential direction of the side wall 34. Specifically, a plurality of cold air windows 341 are provided. The cold air windows 341 are formed in a vertical strip shape, and the plurality of cold air windows 341 are distributed at intervals along the circumferential direction of the bottom wall 33. The area between two adjacent cold air windows 341 belongs to a wind-blocking area, and the wind-blocking area is used to block the cold air windows 341 on another grille. Therefore, through the circumferential interval distribution of the cold air windows 341, an alternating arrangement of the cold air windows 341 and the wind-blocking area can be formed in the circumferential direction, so that both wind blocking and air outlet can be achieved on the same side wall 34. Moreover, the axial-flow impeller is suspended inside the side wall 34 and surrounded by the side wall 34. In this way, the cold air windows 341 on the side wall 34 are arranged in a ring around the axial-flow impeller. When the axial-flow impeller rotates, the formed air flow can be directly blown out from the surrounding cold air windows 341, with high air outlet efficiency and improved cooling efficiency.

[0048] Continue to refer to Figure 6 , in a specific embodiment, the air fryer further includes a lifting assembly 50 and a partition 60. The lifting assembly 50 is installed in the frying basket 20. The lifting assembly 50 is connected to the partition 60, and the lifting assembly 50 is used to drive the partition 60 to lift and lower. Specifically, the partition 60 is for placing food. The lifting assembly 50 is installed at the bottom of the frying basket 20. When the lifting assembly 50 rises, it drives the partition 60 to lift, and the user can directly take out the food from the partition 60 without reaching into the frying basket 20 to take the food. Thus, it can be avoided that the user is scalded when touching the inside of the frying basket 20 when taking the food, eliminating potential safety hazards. It should be noted that the lifting assembly 50 in this embodiment can be of various structural forms and is not limited herein. The following provides a preferred implementation manner in this embodiment.

[0049] Continue to refer to Figure 6 , specifically, the lifting assembly 50 includes a motor and a telescopic rod. The motor is drivingly connected to the telescopic rod to drive the telescopic rod to extend and retract. The partition 60 is connected to the end of the telescopic rod. When the motor drives the telescopic rod to extend, the partition 60 is in a lifted state, facilitating the user to take the food. When the motor drives the telescopic rod to retract, the partition 60 is in a lowered state.

[0050] Continue to refer to Figure 6, in a specific embodiment, the frying basket 20 includes an outer wall 22 and an inner wall 23, and there is a gap between the outer wall 22 and the inner wall 23, so that a vacuum layer 21 is formed between the outer wall 22 and the inner wall 23. Specifically, the frying basket 20 is an integrally formed component, and its vacuum layer 21 is formed during production. The vacuum layer 21 is actually a cavity between the inner and outer walls 22. The purpose of setting the vacuum layer 21 is to prevent the internal food from cooling, because the outer surface of the frying basket 20 is a cold air sandwich layer 13. When in cold air circulation, it will reduce the temperature of the food inside the frying basket 20. Therefore, in this embodiment, a vacuum layer 21 is added inside the frying basket 20 to achieve heat preservation for the internal food.

[0051] Refer to Figure 1 , in a specific embodiment, the air fryer further includes a solenoid valve switch 70, and the solenoid valve switch 70 is installed between the frying basket 20 and the housing 10. Specifically, the solenoid valve switch 70 is arranged in the lower cavity 12 of the housing 10, and the solenoid valve switch 70 is used to lock or release the frying basket 20. By setting the solenoid valve switch 70, the problem that the traditional frying basket 20 usually needs one hand to fix the housing 10 and the other hand to pull out the frying basket 20, resulting in inconvenient taking and placing, can be solved. When the frying basket 20 enters the lower cavity 12, the electromagnetic switch closes to lock the frying basket 20; when the electromagnetic switch is opened, the frying basket 20 is released, and the frying basket 20 can be pulled out of the lower cavity 12 through the handle. Thus, the frying basket 20 can be pulled out with one hand, which is convenient and fast.

[0052] Embodiment 2

[0053] Refer to Figure 8 , this embodiment provides a control method for an air fryer, and the air fryer is the air fryer of Embodiment 1. The control method for the air fryer provided in this embodiment includes:

[0054] S1: If it is detected that the air fryer stops heating, control the first grille 31 and the second grille 32 to rotate relative to each other to open the cold air window 341;

[0055] In this embodiment, the air fryer starts to run. First, the electric heating is turned on and the first grille 31 and the second grille 32 are controlled to rotate relative to each other to the second position. The hot air window 331 is opened and the cold air window is closed, so that the air blows out from the bottom of the grille assembly 30. All the airflows formed by the fan assembly 40 enter the inside of the frying basket 20 from the hot air window 331 for hot air circulation. At this time, the formed airflow is hot air, which heats the food in the frying basket 20 at a high temperature. Among them, the working principle of the air fryer is the "high-speed air circulation technology". It generates hot air by heating the heat pipe inside the machine at a high temperature, and then uses the fan to blow the high-temperature air into the pot to heat the food, so that the hot air circulates in a closed space, and uses the oil in the food itself to fry the food, so as to dehydrate the food and make the surface golden and crispy, achieving the frying effect. Therefore, the air fryer is actually a simple oven with a fan. Of course, it can be understood that the default initial position of the first grille 31 and the second grille 32 is the second position. Therefore, the action of controlling the first grille 31 and the second grille 32 to rotate relative to each other to the second position can be omitted. Then, it is judged whether the heating of the air fryer is over. Whether the heating is over can be judged according to the running time. For example, whether the running time has reached the target time. For example, whether it has been heated for 20 minutes. If it has been heated for 20 minutes, it is determined that the heating is over, otherwise it is not over. Of course, it can be understood that there can also be other judgment methods, which are not limited here. When the heating of the air fryer is over, control the electric heating of the air fryer to stop heating, and control the first grille 31 and the second grille 32 to rotate relative to each other to the first position. The cold air window 341 is opened and the hot air window 331 is closed, so that the grille assembly 30 blows out air laterally. All the airflows formed by the fan assembly 40 enter the cold air interlayer 13 from the cold air window 341 for cold air circulation. At this time, the formed airflow is cold air, which cools the outer surface of the frying basket 20 and reduces the surface temperature of the frying basket 20 to avoid scalding hands.

[0056] S2: If it is detected that the current temperature drops below the preset temperature threshold, control the fan assembly 40 to stop rotating and drive the lifting assembly 50 to lift the partition 60;

[0057] In this embodiment, the fan assembly 40 works continuously, so that the temperature of the outer surface of the frying basket 20 continues to drop. The current temperature is obtained in real time, that is, the temperature of the outer surface of the frying basket 20, which is obtained through a temperature sensor. It is judged whether the current temperature is less than the preset temperature threshold. The preset temperature threshold is, for example, 45 °C, and this preset temperature threshold can be set by the user, for example, 40 °C ≤ T ≤ 50 °C. If the previous temperature is less than the preset temperature threshold, it means that the temperature of the outer surface of the frying basket 20 has dropped to a non-scalding level at this time, eliminating potential safety hazards. At this time, control the fan assembly 40 to stop rotating, and the lifting assembly 50 rises to lift the partition 60, which is convenient for the user to take the food and avoids the user touching the inside of the frying basket 20 when taking the food and getting burned.

[0058] S3: If it is detected that the food on the partition plate 60 is lifted to a preset height, control the solenoid valve switch 70 to open.

[0059] In this embodiment, a detection switch, such as an infrared sensor, is installed in the housing 10. When the lifting assembly 50 lifts the partition plate 60, the infrared sensor can detect that the food on the partition plate 60 is lifted to a preset height. Here, the preset height can be that the distance H between the highest point of the fried food and the edge of the frying basket 20 is ≥ 2 cm. Of course, it can also be other preset heights. In other embodiments, it is also possible to detect that the partition plate 60 is lifted to a preset height, and a proximity sensor or a Hall sensor is used to detect the partition plate 60. Of course, there can also be various other detection methods, which will not be elaborated here one by one. When it is detected that the food is lifted, then control the solenoid valve switch 70 to open, release the frying basket 20, so that the frying basket 20 can be pulled out from the housing 10, realizing one-handed pulling of the frying basket 20. Finally, remind the user that the food is already fried and take out the frying basket 20 in time. For example, the user can be reminded by sound or light. The grille resets to the position where the initial hot air window is opened. After the user takes out the food in the frying basket and then inserts the frying basket into the housing, the solenoid valve switch is closed and the frying basket is locked. Thus, the entire control process of the air fryer is completed.

[0060] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An air fryer, characterized in that, Comprising: A housing; A frying basket removably disposed in the housing, with a gap between the outer sidewall of the frying basket and the inner sidewall of the housing to form a cold air sandwich layer; A grille assembly installed in the housing and located at the top of the frying basket. The grille assembly includes a first grille and a second grille. The first grille and the second grille are coaxially connected. Cold air windows and hot air windows are provided on both the first grille and the second grille. The hot air windows communicate with the inside of the frying basket, and the cold air windows communicate with the cold air sandwich layer; A fan assembly installed in the housing, the fan assembly being configured to blow air towards the cold air windows and the hot air windows; Wherein, when the first grille and the second grille are relatively rotated to a first position, the cold air windows are opened and the hot air windows are closed; when the first grille and the second grille are relatively rotated to a second position, the hot air windows are opened and the cold air windows are closed.

2. The air fryer according to claim 1, wherein The first grille and the second grille are superposed. Both the first grille and the second grille include a bottom wall and sidewalls surrounding the bottom wall. The hot air windows are formed in the bottom wall, and the cold air windows are formed in the sidewalls; Wherein, when the first grille and the second grille are relatively rotated to a first position, the cold air windows overlap and the hot air windows are staggered; when the first grille and the second grille are relatively rotated to a second position, the hot air windows overlap and the cold air windows are staggered.

3. The air fryer according to claim 2, characterized in that, The hot air windows are circumferentially spaced along the bottom wall.

4. The air fryer according to claim 3, characterized in that, The hot air windows gradually widen from the center to the edge of the bottom wall.

5. The air fryer according to claim 2, characterized in that, The fan assembly includes axial flow blades, and the sidewalls surround the circumferential side of the axial flow blades. The cold air windows are circumferentially spaced along the sidewalls.

6. The air fryer according to claim 1, wherein The air fryer further includes a lifting assembly and a partition. The lifting assembly is installed in the frying basket. The lifting assembly is connected to the partition, and the lifting assembly is configured to drive the partition to lift and lower.

7. The air fryer according to claim 6, wherein The lifting assembly includes a motor and a telescopic rod. The motor is drivingly connected to the telescopic rod to drive the telescopic rod to extend and retract. The partition is connected to the end of the telescopic rod.

8. The air fryer according to claim 1, wherein, The frying basket includes an outer wall and an inner wall, with a gap between the outer wall and the inner wall, so that a vacuum layer is formed between the outer wall and the inner wall.

9. The air fryer according to claim 1, characterized in that, The air fryer further includes a solenoid valve switch installed between the frying basket and the housing.

10. A control method for an air fryer, characterized in that, Applied to the air fryer according to any one of claims 1-5, 7-8, the air fryer further includes a lifting assembly and a partition. The lifting assembly is installed in the frying basket. The lifting assembly is connected to the partition, and the lifting assembly is configured to drive the partition to lift and lower. The air fryer further includes a solenoid valve switch installed between the frying basket and the housing. The method includes: If it is detected that the air fryer stops heating, controlling the relative rotation of the first grille and the second grille to open the cold air windows; If it is detected that the current temperature drops below a preset temperature threshold, controlling the fan assembly to stop rotating and driving the lifting assembly to lift the partition; If it is detected that the food on the partition is lifted to a preset height, controlling the solenoid valve switch to open.

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