Air fryer

Abstract

The present specification provides an air fryer, comprising: a working chamber, the working chamber comprising a working portion and an accommodating portion communicating in a first direction, the accommodating portion being used for accommodating food materials; the heating device is fixed in the working part and used for heating food materials, and the orthographic projection area of the heating device in the first direction serves as a first area; and the shielding device is fixed in the working part and is positioned below the heating device along the first direction. Wherein the shielding device can be switched between a first state and a second state. When the shielding device is in the first state, heat radiation emitted by the heating device penetrates through the shielding device to enter the containing part. When the shielding device is in the second state, along the first direction, the overlapping area of the orthographic projection of the shielding device and the orthographic projection of the heating device is used as a second area, and the ratio of the second area to the first area is greater than or equal to 80%.

Description

Technical Field

[0001] This specification relates to the field of cooking technology, and particularly to an air fryer. Background Art

[0002] The working principle of an 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 a blower to blow the high-temperature air into the pot to heat the food, making the hot air circulate in a closed space, and frying the food using the oil in the food itself, so that the food dehydrates and the surface becomes golden and crispy, achieving the frying effect. In the current prior art, there are two solutions for the air fryer to adjust the heating degree of food: 1. By controlling the heating cycle of the heating pipe to make the central temperature in the pot reach the target value. 2. By adding a water storage tank in the pot or spraying water through a pump to improve the baking temperature of the food.

[0003] However, these current means, including the methods of adding water and controlling the central temperature, cannot prevent the problem that the upper surface of the food is over-baked. This problem must be solved by reminding the user to manually turn the food over. It is very inconvenient. Summary of the Utility Model

[0004] To overcome the problems existing in the related art, this specification provides an air fryer.

[0005] According to the first aspect of the embodiments of this specification, an air fryer is provided, including: a working cavity, the working cavity includes a working part and a containing part that communicate along a first direction, and the containing part is used to contain food ingredients; a heating device, the heating device is fixed in the working part and is used to heat the food ingredients, and the orthographic projection area of the heating device along the first direction is used as a first area; a shielding device, fixed in the working part and located below the heating device along the first direction; wherein, the shielding device can be switched between a first state and a second state; when the shielding device is in the first state, the thermal radiation emitted by the heating device passes through the shielding device and enters the containing part; when the shielding device is in the second state, along the first direction, the overlapping area of the orthographic projection of the shielding device and the orthographic projection of the heating device is used as a second area, and the ratio of the second area to the first area is greater than or equal to 80%.

[0006] In the above setting, the state of the shielding device can change. When the shielding device is in the second state, the shielding device can block the thermal radiation emitted by the heating device, reduce the thermal radiation emitted by the heating device and entering the containing part along the first direction, and avoid or reduce the direct irradiation of the thermal radiation on the food ingredients located in the containing part, thereby avoiding the appearance of a charred crust directly on the surface of the food ingredients located in the containing part.

[0007] Further, when the shielding device is in the first state, along the first direction, the overlapping area of the orthographic projection of the shielding device and the orthographic projection of the heating device is used as the second area; the ratio of the first area to the second area is less than or equal to 20%.

[0008] In the above setting, by precisely controlling the relationship between the shielding device and the heating device, the total energy of the thermal radiation emitted by the heating device reaching the accommodating part can be better adjusted, and the working performance of the system can be adjusted as needed. This design can make the system more flexible and adjustable to adapt to different working conditions and requirements.

[0009] Further, the shielding device includes a plurality of fan blades arranged adjacent to each other in the second direction, and the fan blades are rotatably arranged in the working chamber; the second direction is perpendicular to the first direction; each fan blade includes a shielding surface, and when the shielding device is in the second state, along the first direction, the orthographic projections of the shielding surfaces of at least some adjacent fan blades at least partially overlap or are adjacent to each other.

[0010] In the above setting, when the shielding device is in the second state, the orthographic projections of the shielding surfaces of at least some adjacent fan blades at least partially overlap or are adjacent to each other, so that the necessary blocking of the thermal radiation can be realized when necessary, avoiding or reducing the appearance of a burnt crust on the surface of the food material and meeting the cooking requirements.

[0011] Further, when the shielding device is in the second state, the fan blades are inclined, and the plane where the shielding surface is located and the first direction have an inclined angle other than 90°; there is a gap between adjacent fan blades, and a first air passage is formed, and the first air passage communicates the working part and the accommodating part.

[0012] In the above setting, when the shielding device is in the second state, the existence of the first air passage ensures that the hot air heated in the working part can still enter the accommodating part through the first air passage to complete the heating of the food material. At this time, the shielding device blocks the direct thermal radiation generated by the heating device from hitting the food material in the accommodating part, but does not reduce the amount of hot air entering the accommodating part, and still can realize the heating and cooking of the food material, and at the same time can avoid the appearance of a burnt crust on the surface of the food material.

[0013] Further, the inclined angle is greater than or equal to 15° and less than 60°.

[0014] In the above setting, the length of the fan blade is set by restricting the angle, reducing the occupation of the accommodating part when the length of the fan blade is too long.

[0015] Further, some of the fan blades in the shielding device are used as the first fan blades, and some of the other fan blades are used as the second fan blades;

[0016] When the shielding device switches from the first state to the second state, the rotation directions of the first blade and the second blade are opposite; and / or when the shielding device is in the second state, the orthographic projections of the shielding surfaces of adjacent first blades at least partially overlap or are adjacent, and the orthographic projections of the shielding surfaces of adjacent second blades at least partially overlap or are adjacent.

[0017] In the above setting, when the rotation directions of the first blade and the second blade are opposite, hot air enters the accommodating part in different directions respectively, so that the food materials in the accommodating part are fully heated and evenly heated. When the orthographic projections of the shielding surfaces of adjacent first blades or second blades at least partially overlap or are adjacent, when the shielding device is in the second state, the orthographic projections of the shielding surfaces of adjacent blades at least partially overlap or are adjacent, and the complete blocking of heat radiation can be realized when necessary, ensuring that the food materials do not have a burnt crust and meeting the cooking requirements.

[0018] Further, when the shielding device is in the second state, the inclination angles of the first blade and the second blade are opposite to each other.

[0019] In the above setting, the symmetrically arranged blades can ensure that the inflow amount and direction of hot air flowing into the accommodating part are relatively symmetric, so that the heating degrees on both sides of the food materials along the second direction are kept substantially the same, and the cooking is better completed.

[0020] Further, the first blade and the corresponding second blade are taken as a set of shielding components; there are two sets of shielding components in the shielding device; the two sets of shielding components are vertically distributed in the working cavity.

[0021] In the above setting, the two sets of shielding components are vertically arranged, so that the hot air entering the accommodating part can be more evenly distributed, and the heating degrees of all positions of the food materials are kept substantially the same, and the cooking is better completed.

[0022] Further, when the shielding device is in the first state, the plane where the shielding surface of the blade is located is parallel to the first direction.

[0023] In the above setting, when the shielding device is in the first state, the shielding surface of the blade is parallel to the first direction. At this time, the shielding device does not additionally block the heat radiation generated by the heating device. In this way, it can be ensured as much as possible that the light radiation emitted by the heating device can completely enter the accommodating part to directly heat the food materials, so that the food materials located in the accommodating part can have a burnt crust surface according to the user's needs.

[0024] Further, the fan blade includes two oppositely arranged connecting end faces, which are adjacent to the shielding face; positioning connectors are provided on the connecting end faces, and the positioning connectors are rotatably connected to the inner cavity of the air fryer; and / or, the shielding device further includes a driving device and a connecting rod device, the driving device is connected to the connecting rod device and drives the connecting rod device to rotate, the connecting rod device includes a fourth connecting rod, and the connecting end faces of adjacent fan blades with the same rotation direction are rotatably connected to the same fourth connecting rod.

[0025] In the above setting, when the shielding device is in the second state, along the first direction, the orthographic projection of the shielding device covers the orthographic projection of the heating device. The orthographic projection of the shielding component covering the orthographic projection of the heating device can block the heat radiation generated by the heating device from entering the accommodating part as much as possible, so that the air fryer can be used for cooking that cannot have a burnt crust.

[0026] Further, the shielding device includes a driving device and a plurality of fan blades arranged adjacent to each other in the second direction, the driving device drives the fan blades to rotate, and the second direction is perpendicular to the first direction; the air fryer includes an inner shell and an outer shell, the inner shell encloses the working cavity, and the inner shell and the outer shell are spaced apart to form a heat insulation cavity, and at least part of the structure of the driving device is located in the heat insulation cavity.

[0027] Further, the air fryer includes a rotatably connected upper cover and a lower cover. When the upper cover is closed on the lower cover, the inner walls of the upper cover and the lower cover are connected to form the inner shell of the air fryer and enclose the working cavity; wherein, the space enclosed by the inner wall of the upper cover is the working part, and the space enclosed by the inner wall of the lower cover is the accommodating part; the shielding device is fixedly connected to the upper cover.

[0028] Further, the air fryer includes an integral housing and a pull-out housing. An opening is provided on the integral housing, and the pull-out housing enters the integral housing through the opening; when the pull-out housing is located in the integral housing, the inner walls of the integral housing and the pull-out housing are connected to form the inner shell of the air fryer and enclose the working cavity; wherein, the space enclosed by the inner wall of the pull-out housing is the accommodating part; the shielding device is fixedly connected to the integral housing.

[0029] In the above setting, the air fryer is formed by combining an integral housing and a pull-out housing. By pulling out the pull-out housing, the addition of ingredients can be realized, which can expand the opening of the accommodating part, make it more convenient to put in ingredients, improve the use experience and convenience, and the shielding device is fixedly connected to the integral housing, which can improve the structural neatness of the air fryer and reduce the difficulty of maintenance and the like.

[0030] Further, the space enclosed by the inner wall of the upper cover is the working part, and the space enclosed by the inner wall of the lower cover is the accommodating part; the fan blade is completely located in the working part; or, when the upper cover is closed on the lower cover and when the shielding assembly is in the first state, a partial structure of the fan blade is located in the accommodating part.

[0031] In the above arrangement, when the fan blade is completely located in the working part, the fan blade can be completely accommodated in the working part, saving design space, improving space utilization rate, and enhancing the protection of the fan blade; when a partial structure of the fan blade is located in the accommodating part, the partial location of the fan blade in the accommodating part can provide a more uniform air flow, enabling the food ingredients to be heated more fully and evenly.

[0032] Further, the fan blade is completely located in the working part; or, when the upper cover is closed on the lower cover and when the shielding assembly is in the first state, a partial structure of the fan blade is located in the accommodating part.

[0033] Further, the air fryer includes an overall housing and a pull-out housing. An opening is provided on the overall housing, and the pull-out housing enters the overall housing through the opening; when the pull-out housing is located within the overall housing, the inner walls of the overall housing and the pull-out housing are connected to form the inner housing of the air fryer and enclose the working chamber; wherein, the space enclosed by the inner wall of the pull-out housing is the accommodating part; the shielding device is fixedly connected to the overall housing.

[0034] Further, the fan blade is completely located in the working part; or, when the pull-out housing is located within the overall housing and when the shielding assembly is in the first state, a partial structure of the fan blade is located in the accommodating part.

[0035] Further, the air fryer includes an overall housing and a pull-out housing. An opening is provided on the overall housing, and the pull-out housing enters the overall housing through the opening; when the pull-out housing is located within the overall housing, the inner walls of the overall housing and the pull-out housing are connected to form the inner housing of the air fryer and enclose the working chamber; wherein, the space enclosed by the inner wall of the pull-out housing is the accommodating part; the shielding device is fixedly connected to the overall housing.

[0036] Further, the fan blade is completely located in the working part; or, when the pull-out housing is located within the overall housing and when the shielding device is in the first state, a partial structure of the fan blade is located in the accommodating part.

[0037] The technical solutions provided in the embodiments of this specification may include the following beneficial effects:

[0038] The angle of the shielding device can be adjusted according to customer needs to achieve the blocking of different degrees of thermal radiation. Specifically, when the user needs to form a charred crust on the surface of the food, the shielding device can be adjusted to the first state. At this time, the thermal radiation is not blocked additionally, and most of the thermal radiation can directly enter the accommodating part to heat the food. The surface of the food located in the accommodating part receives sufficient thermal radiation, and a charred crust is likely to form on its surface. When the user cooks food that does not require or cannot produce a charred crust, the shielding device can be adjusted to the second state, and the fan blades are tilted. At this time, most or all of the thermal radiation is blocked by the shielding device to prevent the food from producing a charred crust. Description of the Drawings

[0039] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with this specification, and are used together with the specification to explain the principles of this specification.

[0040] Figure 1 It is a structural diagram of an air fryer according to one embodiment of this specification.

[0041] Figure 2 It is a perspective view of the shielding component of an air fryer according to one embodiment of this specification in the first state.

[0042] Figure 3 It is a perspective view of the shielding component of an air fryer according to one embodiment of this specification in the second state.

[0043] Figure 4 It is a structural diagram of the link device in the shielding component of an air fryer according to one embodiment of this specification.

[0044] Figure 5 It is a structural diagram of the link device and the motor shaft in the shielding component of an air fryer according to one embodiment of this specification.

[0045] Figure 6 It is a structural diagram of the fan blade component in the shielding component of an air fryer according to one embodiment of this specification.

[0046] Figure 7 It is a structural diagram of an air fryer according to one specific embodiment of this specification.

[0047] Figure 8 It is a structural diagram of an air fryer according to another specific embodiment of this specification.

[0048] Description of the Reference Numerals

[0049] 1. Air fryer, 10. Inner shell, 11. Inner cavity, 20. Outer shell, 30. Working cavity, 31. Working part, 32. Accommodating part, 40. Heat insulation cavity, 50. Upper cover, 60. Lower cover, 70. Whole machine shell, 80. Drawer shell, 90. Peripheral air duct, 100. Heating device, 200. Shielding device, 210. Fan blade, 210’. First fan blade, 210”. Second fan blade, 211. Shielding surface, 212. Connecting end face, 213. Positioning connecting piece, 214. First state, 215. Second state, 216. First air passage, 300. Blowing device, 310. Fan, 320. Fan motor, 400. Driving device, 410. Linkage device, 411. First link, 412. Second link, 413. Third link, 414. Fourth link, 415. Fifth link, 416. Sixth link, 417. Seventh link, 410. Transmission rod, 420. Motor, 421. Power output shaft, H. First direction, X. Second direction. Detailed implementation manners

[0050] Some embodiments of the present disclosure will be described in detail herein, and examples thereof are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. Various changes, modifications and equivalents of the methods, devices and / or systems described herein will become apparent after understanding the present disclosure. For example, the order of operations described herein is merely an example and is not limited to those set forth herein, but may be changed as will be apparent after understanding the present disclosure, except for operations that must be performed in a specific order. Additionally, descriptions of features known in the art may be omitted for the sake of clarity and conciseness.

[0051] Figure 1 It is a structural diagram of an air fryer in this specification. An air fryer 1 includes an inner shell 10, an outer shell 20, a working cavity 30, a heat insulation cavity 40, a heating device 100, a shielding device 200, a blowing device 300 and a driving device 400. The working cavity 30 is surrounded by the inner shell 10 and includes a working part 31 and an accommodating part 32. The inner shell 10 and the outer shell 20 are spaced apart to form the heat insulation cavity 40. At least part of the structure of the driving device 400 is located in the heat insulation cavity 40. The blowing device 300 is located in the working part 31 and can blow air towards the accommodating part 32. A peripheral air duct 90 is provided between the inner shell 10 and the outer shell 20 for allowing hot air to enter the bottom of the food material for all-round heating so that the food material can be fully cooked.

[0052] The blowing device 300 includes a fan 310 and a fan motor 420. The fan 310 can generate wind power on the heating device 100 under the drive of the fan motor 420, and blow the air around the heating device 100 towards the accommodating space.

[0053] Figure 2 It is a perspective view of a shielding component of an air fryer in the first state in this specification. Figure 3It is a perspective view of a shielding component of an air fryer in a second state in this specification. The working cavity 30 includes a working part 31 and a containing part 32 that communicate along a first direction H. The containing part 32 is used to contain food ingredients. The heating device 100 is fixed in the working part 31 and is used to heat the food ingredients. The orthographic projection area of the heating device 100 along the first direction H is used as a first area. The shielding device 200 is fixed in the working part 31 and is located below the heating device 100 along the first direction H. Among them, the shielding device 200 can be switched between a first state 214 and a second state 215. When the shielding device 200 is in the first state 214, the thermal radiation emitted by the heating device 100 passes through the shielding device 200 and enters the containing part 32. When the shielding device 200 is in the second state 215, along the first direction H, the overlapping area of the orthographic projection of the shielding device 200 and the orthographic projection of the heating device 100 is used as a second area, and the ratio of the second area to the first area is greater than or equal to 80%. The heating device 100 located in the working part 31 generates heat to heat the air. The hot air is blown to the containing part 32 under the action of the fan, heating the food ingredients located in the containing part 32, realizing the circulation of hot air in a closed space, achieving the effect of frying food ingredients, and making the surface of the food ingredients appear charred. Among them, in order to prevent the food ingredients from appearing charred, the shielding device 200 can be used to block the thermal radiation emitted by the heating device 100, avoid direct irradiation of the thermal radiation, and reduce the thermal radiation emitted by the heating device 100 from entering the containing part 32 along the first direction H. Specifically, the heating device 100 can be a luminous light wave tube or a non-luminous metal heating tube, but it is always located in the heating space and will not change its position due to state changes. At the same time, the air fryer 1 also includes a fan 310 and a fan motor 420. The fan 310 is installed on the side of the heating device 100 away from the containing part 32. Driven by the fan motor 420, the fan 310 rotates to push the air near the heating device 100 heated by the heating device 100 to flow towards the containing part 32. Further, the control fryer also includes a peripheral air duct 90. The peripheral air duct 90 is arranged in the side walls of the upper cover 50 and the lower cover 60. One end of the peripheral air duct 90 is connected to the working part 31, and the other end is connected to the bottom of the containing part 32, that is, leading to the bottom of the food ingredients. Such a setting can allow part of the hot air to flow from the top of the working part into the peripheral channel when most of the hot air flows into the containing part 32 from the first air passage 216, and then flow to the bottom of the food ingredients, heating the bottom of the food ingredients, making the food ingredients evenly heated, avoiding the situation that the bottom of the food ingredients cannot fully contact the hot air due to contact with the air fryer 1 and being less heated than the upper surface of the food ingredients. At the same time, since the bottom of the food ingredients is heated, the missing heating angle is filled, eliminating the need to work on the reverse side of the food ingredients, enabling the user not to manually perform the reverse side work on the food ingredients, reducing the operation amount of the user, and simplifying the operation.

[0054] When the shielding device 200 is in the first state 214, along the first direction H, the overlapping area of the orthographic projection of the shielding device 200 and the orthographic projection of the heating device 100 is used as the second area; the ratio of the first area to the second area is less than or equal to 20%. By restricting the overlapping area between the shielding device 200 and the heating device 100, energy loss can be reduced. If the shielding device 200 completely shields the heating device 100, it may cause the food ingredients not to be fully heated, and this design can reduce energy consumption while ensuring the function. By ensuring that the shielding device 200 does not completely shield the heating device 100, the normal operation of the heating device 100 can be maintained, thereby improving the efficiency and performance of the system. And by restricting the overlapping area between the shielding device 200 and the heating device 100, sufficient ventilation and heat dissipation of the heating device 100 can be ensured, thereby prolonging the life of the equipment and reducing the maintenance cost. By precisely controlling the relationship between the shielding device 200 and the heating device 100, the output of the heating device 100 can be better adjusted, and the working performance of the system can be adjusted according to needs. This design can make the system more flexible and adjustable to adapt to different working conditions and requirements.

[0055] The shielding device 200 includes a plurality of fan blades 210 arranged adjacent to each other along the second direction X, and the fan blades 210 are rotatably arranged in the working chamber 30; the second direction X is perpendicular to the first direction H; the fan blade 210 includes a shielding surface 211. When the shielding device 200 is in the second state 215, along the first direction H, the orthographic projections of the shielding surfaces 211 of at least some adjacent fan blades 210 at least partially overlap or are adjacent. The fan blades 210 can rotate to switch between the first state 214 and the second state 215. When the fan blades 210 are in the second state 215, since the inclination angle is greater than that in the first state 214, the total projected area of the fan blades 210 in the first direction H is larger. At this time, the orthographic projections of the shielding surfaces 211 of the fan blades 210 at least partially overlap or are adjacent, which means that adjacent fan blades 210 can be completely shielded in a certain state, achieving the cooking requirement when the food ingredients do not need or cannot be directly irradiated by thermal radiation, and ensuring that the food ingredients do not have a charred shell and affect the edibility.

[0056] When the shielding device 200 is in the second state 215, the fan blades 210 are inclined, and the plane where the shielding surface 211 is located forms an inclined angle other than 90° with the first direction H; adjacent fan blades 210 are spaced apart to form a first air passage 216, and the first air passage 216 communicates with the working part 31 and the accommodating part 32. The first air passage 216 is used to allow hot air to enter the accommodating part 32 after being heated by the heating device 100. The angle between the shielding surface 211 and the first direction H not being 90° can ensure that the shielding surface 211 does not completely block the first air passage 216, leaving enough space for the existence of the first air passage 216, ensuring that the hot air in the working part 31 can directly enter the accommodating part 32. Specifically, the function of the fan blades 210 is to change the flow direction of the hot air flowing into the accommodating part 32 and block part of the heat radiation, so that the food materials on the periphery of the accommodating part 32 can also be fully heated, ensuring the uniform heating of the food materials, improving the cooking effect, and simplifying the user operation difficulty.

[0057] The inclined angle is greater than or equal to 15° and less than 60°. By restricting the minimum inclined angle, it is ensured that the sizes of adjacent fan blades 210 are suitable, which can reduce the occupation of the accommodating part 32 while realizing the overlap of the projection surfaces, facilitating miniaturization; by restricting the maximum inclined angle, it is ensured that the first air passage 216 can be left, ensuring that the hot air flows into the accommodating part 32 from here. Moreover, by restricting the minimum inclined angle, the length of the fan blades 210 is ensured to be suitable for the device: when the fan blades 210 are in the second state 215, the projection surfaces are in contact or overlap, and the minimum inclined angle of the fan blades 210 is restricted, so that the length of the fan blades 210 is suitable for the air fryer 1, indirectly restricting the length of the fan blades 210, reducing the occupation of the accommodating part 32 by the fan blades 210, improving the space utilization rate of the accommodating part 32, and allowing more food materials to be put into cooking.

[0058] Part of the fan blades 210 in the shielding device 200 are used as the first fan blades 210', and the other part of the fan blades 210 are used as the second fan blades 210"; when the shielding device 200 switches from the first state 214 to the second state 215, the rotation directions of the first fan blades 210' and the second fan blades 210" are opposite.

[0059] Furthermore, since the inclination directions of the first air passage 216 and the second air passage are different, the hot air enters the accommodating part 32 differently, so that the hot air can uniformly fill the accommodating part 32, improving the cooking effect.

[0060] When the shielding device 200 is in the second state 215, the orthographic projections of the shielding surfaces 211 of the adjacent first fan blades 210' at least partially overlap or are adjacent, and the orthographic projections of the shielding surfaces 211 of the adjacent second fan blades 210'' at least partially overlap or are adjacent.

[0061] The fan blade 210 can rotate to switch between the first state 214 and the second state 215. When the fan blade 210 is in the second state 215, since the inclination angle is greater than that in the first state 214, the total projected area of the fan blade 210 in the first direction H is larger. At this time, the orthographic projection of the shielding surface 211 of the fan blade 210 at least partially overlapping or being adjacent means that adjacent fan blades 210 can be completely shielded in a certain state, achieving the effect of blocking thermal radiation, thus realizing the cooking requirement when the food ingredients do not need or cannot be directly irradiated by thermal radiation, and ensuring that the food ingredients do not have a burnt crust and affect the edibility.

[0062] Specifically, in some embodiments, the inclination directions of the first fan blade 210' and the second fan blade 210'' are the same, then the orthographic projections of the shielding surfaces 211 of the adjacent fan blades 210 at least partially overlap or are adjacent; in some embodiments, the inclination directions of the first fan blade 210' and the second fan blade 210'' are different, then the orthographic projections of the shielding surfaces 211 of the adjacent fan blades 210 of the first fan blade 210' at least partially overlap or are adjacent, and the orthographic projections of the shielding surfaces 211 of the adjacent fan blades 210 of the second fan blade 210'' at least partially overlap or are adjacent. The orthographic projections of the shielding surfaces 211 of the two adjacent fan blades 210 of the first fan blade 210' and the second fan blade 210'' are adjacent. It should be noted that the tops or bottoms of these two fan blades 210 along the first direction H are in contact, so as to ensure that the projection surfaces are adjacent and achieve the blocking of thermal radiation.

[0063] When the shielding device 200 is in the second state 215, the inclination angles of the first blade 210' and the second blade 210" are opposite to each other. That is, the first blade 210' and the second blade 210" are symmetrically arranged along the vertical direction, so that the hot air entering the accommodating part 32 is also symmetrical, enabling the hot air to enter symmetrically and evenly fill the accommodating part 32, thereby improving the cooking effect. Further, due to the symmetrical arrangement of the first blade 210' and the second blade 210", the hot air flowing into the accommodating part 32 is also highly symmetrical, and the formed air vortices are also highly symmetrical. That is, in the second state 215, the hot air flows into the accommodating part 32 along the first air passage 216, flows along the first direction H away from the working part 31 after contacting the inner wall, flows along the surface of the food after contacting the food, and is divided into a part flowing horizontally towards the center of the accommodating part 32 and a part continuing to flow along the first direction H, greatly improving the distribution of the hot air in the accommodating part 32, enabling the food to be heated sufficiently and evenly. Uniformly heating the food ensures that the degree of ripeness of the food is approximately the same, guarantees uniform cooking, improves the cooking effect, avoids the possibility that part of the food is burnt while part is not yet ripe, and solves the problem that the upper surface of the food is over-baked.

[0064] The first blade 210' and the corresponding second blade 210" are taken as a set of shielding components; the shielding device 200 includes two sets of shielding components; the two sets of shielding components are vertically distributed in the working cavity 30. The symmetrical arrangement of the two sets of shielding components enables the hot air entering the accommodating part 32 to be evenly distributed in four directions perpendicular to each other, ensuring the most uniform distribution of the hot air in the accommodating part 32 and the uniform heating of the food to the greatest extent.

[0065] When the shielding device 200 is in the first state 214, the plane where the shielding surface 211 of the blade 210 is located is parallel to the first direction H. When the shielding device 200 is in the first state 214, the blocking device does not impose an additional block on the heating device 100, and only a certain block is generated due to the thickness of the blocking device, ensuring that the heating device 100 heats the food at its maximum power.

[0066] Figure 4 It is a structural diagram of the connecting rod device 410 in the shielding component of an air fryer in this specification. Figure 5It is a structural diagram of the connecting rod device 410 and the motor shaft in the shielding component of an air fryer in this specification. The fan blade 210 includes two oppositely arranged connecting end faces 212, and the connecting end faces 212 are adjacent to the shielding face 211; there is a positioning connecting piece 213 on the connecting end face 212, and the positioning connecting piece 213 is rotatably connected to the inner cavity 11 of the air fryer 1; and / or, the shielding device 200 further includes a driving device 400 and a connecting rod device 410, the driving device 400 is connected to the connecting rod device 410 and drives the connecting rod device 410 to rotate, the connecting rod device 410 includes a fourth connecting rod 414, and the connecting end faces 212 of adjacent fan blades 210 with the same rotation direction are rotatably connected to the same fourth connecting rod 414. The driving device 400 is connected to the motor 420 and the connecting rod device 410, and the connecting rod device 410 is connected to the fan blade 210. Specifically, the connecting rod device 410 includes a first connecting rod 411, a second connecting rod 412, a third connecting rod 413, a fourth connecting rod 414, a fifth connecting rod 415, a sixth connecting rod 416, and a seventh connecting rod 417. Among them, there are two third connecting rods 413, fourth connecting rods 414, and fifth connecting rods 415 that are symmetrically distributed.

[0067] Figure 6 It is a structural diagram of the fan blade assembly in the shielding component of an air fryer in this specification. Specifically, the connecting rod device 410 is composed of 10 connecting rods. Each connecting rod is connected by a rotating shaft. The power output shaft 421 is fixedly connected to the first connecting rod 411. One end of the first connecting rod 411 is connected to the second connecting rod 412 and the sixth connecting rod 416 by a rotating shaft, and the other end is connected to the third connecting rod 413 and the fourth connecting rod 414 by a rotating shaft. Among them, the end of the third connecting rod 413 that is not connected to the fourth connecting rod 414 is connected to the fifth connecting rod 415 by a rotating shaft, and the seventh connecting rod 417 connects the second connecting rod 412 and one of the fifth connecting rods 415 that is far from the second connecting rod 412. The rotation of the power output shaft 421 can drive the first connecting rod 411 to swing in the same direction, and then drive the fourth connecting rod 414 connected to the first connecting rod 411 by a rotating shaft to move. While the first connecting rod 411 swings, it will drive the second connecting rod 412, the fifth connecting rod 415, the sixth connecting rod 416, and the second connecting rod 412 connected to it to swing. Among them, the second connecting rod 412 swings relative to the power output shaft 421, and its swinging direction is opposite to that of the first connecting rod 411. The swinging of the second connecting rod 412 will drive the fourth connecting rod 414 connected to it to move. In this way, the fourth connecting rod 414 can drive the connecting rods on the fan blade 210 assembly to move to realize the swinging of the fan blade 210.

[0068] When the shielding device 200 is in the second state 215, along the first direction H, the orthographic projection of the shielding device 200 covers the orthographic projection of the heating device 100. The orthographic projection of the shielding component covering the orthographic projection of the heating device 100 can completely block the heat radiation generated by the heating device 100 from entering the accommodating portion 32, so that the air fryer 1 can be used for cooking that does not allow the appearance of a burnt crust. At this time, the first blade 210' and the second blade 210" are inclined towards each other, and one piece of the first blade 210' close to the second blade 210" is in contact with one piece of the second blade 210" close to the first blade 210' in the first direction H, that is, their projections are adjacent. By setting it in this way, the heat radiation at the center of the heating device 100 can be completely blocked, avoiding the generation of a burnt crust on the food ingredients.

[0069] The shielding device 200 includes a driving device 400 and a plurality of blades 210 arranged adjacent to each other along the second direction X. The driving device 400 drives the blades 210 to rotate, and the second direction X is perpendicular to the first direction H; the air fryer 1 includes an inner shell 10 and an outer shell 20. The inner shell 10 encloses the working chamber 30, and the inner shell 10 and the outer shell 20 are arranged at intervals to form a heat insulation chamber 40. At least part of the structure of the driving device 400 is located in the heat insulation chamber 40. For example, the motor 420 and the like are arranged in the heat insulation chamber 40 to ensure that it can operate normally for a long time and reduce the influence of high temperature on it.

[0070] The driving device 400 drives the blades 210 to rotate to adjust the inclination angle of the blades 210 to meet different cooking requirements. The second direction X is perpendicular to the first direction H. The driving device 400 includes a motor 420. The motor 420 needs to operate normally at a normal temperature. Therefore, the motor 420 is installed in the heat insulation chamber 40 to ensure that the motor 420 can operate continuously and normally for a long time.

[0071] Figure 7The figure is a structural diagram of an air fryer according to a specific embodiment of this specification. The air fryer 1 includes an upper cover 50 and a lower cover 60 that are rotatably connected. When the upper cover 50 is closed on the lower cover 60, the inner walls of the upper cover 50 and the lower cover 60 are connected to form the inner shell 10 of the air fryer 1 and enclose the working chamber 30. Among them, the space enclosed by the inner wall of the upper cover 50 is the working part 31, and the space enclosed by the inner wall of the lower cover 60 is the accommodating part 32. The shielding device 200 is fixedly connected to the upper cover 50. The rotatable connection between the upper cover 50 and the lower cover 60 can provide the lower cover 60 with as large an opening as possible, facilitating the placement of food ingredients. The installation of the shielding device 200 on the upper cover 50 has the advantages of not blocking the food ingredients and being convenient to use. When opening the cover to add food ingredients, it will not obstruct the placement of food ingredients at the top of the lower cover 60, and after the food ingredients are placed, the upper cover 50 can be directly closed for cooking, eliminating the complex and redundant steps of removing the shielding device 200 after opening the upper cover 50 and then placing the food ingredients, improving the user experience.

[0072] It should be noted that Figure 7 Only the upper cover 50, the lower cover 60, and the working chamber 30 therein are shown, and structures such as the fan blade 210 are not shown in the figure.

[0073] In this embodiment, the upper cover 50 is rotatably connected to the lower cover 60.

[0074] When the fan blade 210 is completely located in the working part 31, since the fan blade 210 is located within the working part 31 regardless of whether the shielding device 200 is in the first state 214 or the second state 215, it will not protrude from the upper cover 50 and will not affect the opening and closing of the upper cover 50.

[0075] When part of the structure of the fan blade 210 is located in the working part 31 and part of the structure is located in the accommodating part 32, then the path of the end of the fan blade 210 during opening of the cover should not cross the inner shell 10, that is, the fan blade 210 will not rub against and interfere with the inner shell 10 even when it is tilted outward in the second state 215. When part of the structure of the fan blade 210 is located outside the working part 31 when the shielding device 200 is in the first state 214 and all of it is located within the working part 31 when the shielding device 200 is in the second state 215, then there is no need to consider interference between the fan blade 210 and the inner shell 10 at this time.

[0076] Through the above settings, users can easily observe the cooking state of the food, can see the internal situation without opening the fryer, which is convenient for flipping or adjusting the food, and the flip-up design usually can be vertically raised after flipping, without occupying too much space, and is suitable for use in a kitchen with limited space.

[0077] Figure 8It is a structural diagram of an air fryer according to another specific embodiment of this specification. The air fryer 1 includes an overall housing 70 and a drawer housing 80. An opening is provided on the overall housing 70, and the drawer housing 80 enters the overall housing through the opening; when the drawer housing 80 is located within the overall housing, the inner walls of the overall housing and the drawer housing 80 are connected to form the inner housing 10 of the air fryer 1 and enclose the working chamber 30; wherein, the space enclosed by the inner wall of the drawer is the accommodating portion 32; the shielding device 200 is fixedly connected to the overall housing 70. The air fryer 1 is formed by combining the overall housing 70 and the drawer housing 80. By pulling out the drawer housing 80, ingredients can be added, which can enlarge the opening of the accommodating portion 32, making it more convenient to put in ingredients, improving the user experience and convenience of use. And the shielding device 200 is fixedly connected to the overall housing 70, which can improve the structural neatness of the air fryer 1 and reduce the difficulty of maintenance, etc.

[0078] It should be noted that Figure 8 only the overall housing 70, the drawer housing 80 and the working chamber 30 therein are shown, and structures such as the fan blade 210 are not shown in the figure.

[0079] In this embodiment, the overall housing 70 and the drawer housing 80 are combined by pulling and pushing to form a whole. Since the opening method of this embodiment is to pull out the drawer housing 80 to add ingredients, when the fan blade 210 is completely within the working portion 31 both when the shielding device 200 is in the first state 214 and the second state 215, the drawer housing 80 can be pulled out at any time without causing any impact;

[0080] When the fan blade 210 is completely within the working portion 31 when the shielding device 200 is in the second state 215, and when the shielding device 200 is in the first state 214, part of the structure is outside the working portion 31, then when opening, it should be ensured that the shielding device 200 is in the second state 215 to avoid damage to the fan blade 210 caused by the collision during pulling. When part of the structure of the fan blade 210 is outside the working portion 31 both when the shielding device 200 is in the first state 214 and the second state 215, adjustment is required until the fan blade 210 is completely within the working portion 31 in at least one state of the shielding device 200.

[0081] Through the above settings, the pull-out design usually slides out along a certain track when opened, which can minimize the release of heat and help maintain the stability of the cooking environment.

[0082] In the foregoing detailed description, reference has been made to the accompanying drawings, in which certain aspects of the present disclosure can be practiced by way of illustration. In this regard, directional or positional relationship terms such as “center,” “upper,” “lower,” “left,” “right,” “vertical,” “top,” “bottom,” “inner,” “outer,” etc. may be used with reference to the orientation of the described figures. Since the components of the described devices can be positioned in a number of different orientations, the directional terms are used for illustrative purposes and not for limitation. It should be understood that other aspects can be utilized and structural or logical changes can be made without departing from the concepts of the present disclosure. Accordingly, the following detailed description should not be taken in a limiting sense.

Claims

1. An air fryer, characterized in that, The air fryer includes: A working chamber (30), which includes a working part (31) and a receiving part (32) communicating along a first direction (H). The receiving part (32) is used to receive food ingredients; A heating device (100), which is fixed in the working part (31) and is used to heat food ingredients. The orthographic projection area of the heating device (100) along the first direction (H) is regarded as the first area; A shielding device, which is fixed in the working part (31) and is located below the heating device (100) along the first direction (H); Wherein, the shielding device can be switched between a first state (214) and a second state (215); when the shielding device (200) is in the first state (214), the thermal radiation emitted by the heating device (100) passes through the shielding device (200) and enters the receiving part (32); when the shielding device (200) is in the second state (215), along the first direction (H), the overlapping area of the orthographic projection of the shielding device (200) and the orthographic projection of the heating device (100) is regarded as the second area, and the ratio of the second area to the first area is greater than or equal to 80%.

2. The air fryer according to claim 1, characterized in that: When the shielding device (200) is in the first state, along the first direction (H), the overlapping area of the orthographic projection of the shielding device (200) and the orthographic projection of the heating device (100) is regarded as the second area; The ratio of the first area to the second area is less than or equal to 20%.

3. The air fryer according to claim 1, characterized in that: The shielding device (200) includes a plurality of fan blades (210) arranged adjacent to each other along a second direction. The fan blades (210) are rotatably arranged in the working chamber (30); the second direction (X) is perpendicular to the first direction (H); The fan blade (210) includes a shielding surface (211). When the shielding device (200) is in the second state, along the first direction (H), at least part of the orthographic projections of the shielding surfaces (211) of at least some adjacent fan blades (210) at least partially overlap or are adjacent to each other.

4. The air fryer according to claim 3, characterized in that: When the shielding device (200) is in the second state, the fan blades (210) are inclined, and the plane where the shielding surface (211) is located and the first direction (H) have an inclined angle other than 90°; The adjacent fan blades (210) are spaced apart from each other and form a first air passage (216), and the first air passage (216) communicates the working part (31) and the receiving part (32).

5. The air fryer according to claim 4, characterized in that: The inclined angle is greater than or equal to 15° and less than 60°.

6. The air fryer according to claim 3, characterized in that: Take part of the fan blades (210) in the shielding device (200) as the first fan blades (210'), and the other part of the fan blades (210) as the second fan blades (210"). When the shielding device (200) switches from the first state (214) to the second state (215), the rotation directions of the first fan blades (210') and the second fan blades (210") are opposite; and / or when the shielding device (200) is in the second state (215), the orthographic projections of the shielding surfaces (211) of adjacent first fan blades (210') at least partially overlap or are adjacent, and the orthographic projections of the shielding surfaces (211) of adjacent second fan blades (210") at least partially overlap or are adjacent.

7. The air fryer according to claim 6, wherein: When the shielding device (200) is in the second state (215), the inclination angles of the first fan blades (210') and the second fan blades (210") are opposite numbers to each other.

8. The air fryer according to claim 6, wherein: Take the first fan blades (210') and the corresponding second fan blades (210") as a set of shielding components; the shielding device (200) includes two sets of shielding components; The two sets of shielding components are vertically distributed in the working cavity (30).

9. The air fryer according to claim 3, wherein: When the shielding device (200) is in the first state (214), the plane where the shielding surface (211) of the fan blades (210) is located is parallel to the first direction (H).

10. The air fryer according to claim 3, wherein: The fan blades (210) include two oppositely arranged connecting end faces (212), and the connecting end faces (212) are adjacent to the shielding surface (211); There are positioning connectors (213) on the connecting end faces (212), and the positioning connectors (213) are rotatably connected to the inner cavity (11) of the air fryer (1); and / or the shielding device (200) further includes a driving device (400) and a connecting rod device (410), the driving device (400) is connected to the connecting rod device (410) and drives the connecting rod device (410) to rotate, the connecting rod device (410) includes a fourth connecting rod (414), and the connecting end faces of adjacent fan blades (210) with the same rotation direction are rotatably connected to the same fourth connecting rod (414).

11. The air fryer according to claim 1, wherein: When the shielding device (200) is in the second state (215), along the first direction (H), the orthographic projection of the shielding device (200) covers the orthographic projection of the heating device (100).

12. The air fryer according to claim 11, wherein: The shielding device (200) includes a driving device (400) and a plurality of blades (210) arranged adjacent to each other along the second direction (X). The driving device (400) drives the blades (210) to rotate, and the second direction (X) is perpendicular to the first direction (H). The air fryer (1) includes an inner shell (10) and an outer shell (20). The inner shell (10) encloses the working chamber (30). The inner shell (10) and the outer shell (20) are spaced apart to form a heat insulation chamber (40). At least part of the structure of the driving device (400) is located in the heat insulation chamber (40).

13. The air fryer according to claim 12, wherein: The air fryer (1) includes a top cover (50) and a bottom cover (60) that are rotatably connected. When the top cover (50) is closed on the bottom cover (60), the inner walls of the top cover (50) and the bottom cover (60) are connected to form the inner shell (10) of the air fryer (1) and enclose the working chamber (30); wherein, the space enclosed by the inner wall of the top cover (50) is the working part (31), and the space enclosed by the inner wall of the bottom cover (60) is the accommodating part (32); The shielding device (200) is fixedly connected to the top cover (50).

14. The air fryer according to claim 13, wherein: The blades (210) are completely located in the working part (31); or, When the top cover (50) is closed on the bottom cover (60) and when the shielding device (200) is in the first state (214), part of the structure of the blades (210) is located in the accommodating part (32).

15. The air fryer according to claim 12, wherein: The air fryer (1) includes an overall housing (70) and a drawer housing (80). An opening is provided on the overall housing (70), and the drawer housing (80) enters the overall housing (70) through the opening; When the drawer housing (80) passes through and is located in the overall housing (70), the inner walls of the overall housing (70) and the drawer housing (80) are connected to form the inner shell (10) of the air fryer (1) and enclose the working chamber (30); wherein, the space enclosed by the inner wall of the drawer housing (80) is the accommodating part (32); The shielding device (200) is fixedly connected to the overall housing (70).

16. The air fryer according to claim 15, wherein: The blades (210) are completely located in the working part (31); or, when the drawer housing (80) is located inside the overall housing (70) and when the shielding device (200) is in the first state (214), part of the structure of the blades (210) is located in the accommodating part (32).

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