Air fryer

Abstract

The air fryer comprises a machine shell and a reflecting cover, the reflecting cover divides the inner space of the machine shell into a heating cavity and a heat dissipation cavity, a hot air fan and a heating piece are arranged in the heating cavity, a motor for driving the hot air fan and a heat dissipation fan connected with the motor are arranged in the heat dissipation cavity, and an air inlet communicated with the heat dissipation cavity is formed in the machine shell. An air guide cover and a plurality of air guide ribs located on the periphery of the air guide cover are further arranged in the heat dissipation cavity, the air guide cover is provided with an air guide inlet and an air guide outlet communicated with the outside atmosphere, the heat dissipation fan is arranged in the air guide cover, a heat dissipation air channel is formed between every two adjacent air guide ribs in the multiple air guide ribs, and the heat dissipation air channels are communicated with the air inlet and the air guide inlet. Air flow extracted by the rotating cooling fan through the air inlet sequentially flows through the cooling air channels and the air guide cover and then is exhausted through the air guide outlet. According to the air fryer, the airflow short circuit phenomenon is effectively reduced, the problem of high temperature of a local area is solved, the heat dissipation effect is improved, and the machine surface temperature is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of kitchen appliances, and in particular to an air fryer. Background Art

[0002] The air fryer has the function of baking and cooking, using hot air to bake food, making the food have a crispy taste without frying. There are various types of air fryers on the market, and their structures are different, but most of them include a casing and a reflector cover. A heat dissipation cavity is formed above the reflector cover, and a heating cavity is formed below the reflector cover. A heating element is arranged in the heating cavity. The heating element emits heat to heat the air into hot air, so that the hot air bakes and cooks the food placed in the heating cavity. When the existing air fryer is working, the outer surface temperature is generally high. However, with the integration of more functions, more functional components are required, which will inevitably increase the pressure of heat dissipation of the whole machine.

[0003] The existing technology generally adopts the solution of bottom air intake and rear air outlet. The air enters from the bottom of the fuselage, passes through the side wall of the fuselage to the upper heat dissipation cavity, and is discharged from the fuselage through the heat dissipation fan. The air dissipates heat for the functional devices along the way, which are usually arranged in the heat dissipation cavity. However, the cold air has no definite flow path in the heat dissipation cavity, and the functional devices have different volumes. When a large-volume functional device appears on the cold air's path, the cold air will change its direction of travel due to encountering greater resistance, i.e., the airflow short-circuit phenomenon, resulting in a reduction in the amount of cold air flowing through the functional device with large wind resistance and the area where it is located, and no effective heat dissipation is obtained. In addition, the overall heat dissipation of the heat dissipation cavity is uneven, and the local high temperature causes the shell temperature to exceed the standard, forcing the use of materials with higher temperature resistance, which increases the cost. Utility Model Content

[0004] The present application provides an air fryer to improve or solve to a certain extent the technical problems of the above-mentioned existing air fryers, such as chaotic air flow in the heat dissipation cavity, poor heat dissipation effect, and easy occurrence of air flow short circuit, local high temperature and the like.

[0005] The technical solution adopted in this application is:

[0006] An air fryer comprises a casing and a reflective cover arranged in the casing, the reflective cover divides the internal space of the casing into a heating chamber and a heat dissipation chamber located above the heating chamber, a hot air fan and a heating element are arranged in the heating chamber, a motor for driving the hot air fan and a heat dissipation fan connected to the motor are arranged in the heat dissipation chamber, an air inlet connected to the heat dissipation chamber is arranged on the casing, an air guide cover and a plurality of air guide ribs located at the periphery of the air guide cover are arranged in the heat dissipation chamber, the air guide cover is provided with an air guide inlet and an air guide outlet connected to the outside atmosphere, the heat dissipation fan is arranged in the air guide cover, heat dissipation air ducts are formed between adjacent air guide ribs among the plurality of air guide ribs, the heat dissipation air duct is connected with the air inlet and the air guide inlet, so that the airflow drawn by the rotating heat dissipation fan through the air inlet is discharged through the air guide outlet after flowing through each heat dissipation air duct and the air guide cover in sequence.

[0007] The air fryer in this application also has the following additional technical features:

[0008] The plurality of air guiding ribs surround the periphery of the air guiding cover and are distributed radially, and the width of the heat dissipation air duct gradually decreases from one end away from the air guiding cover to one end close to the air guiding cover.

[0009] The projection of the air guiding rib on the horizontal plane is a straight line; or, the projection of the air guiding rib on the horizontal plane is an arc.

[0010] The included angles of projections of any adjacent wind guide ribs among the multiple wind guide ribs on the horizontal plane are consistent; or, any two adjacent wind guide ribs among the multiple wind guide ribs form an wind guide group, and the included angle of projections of two wind guide ribs in at least one wind guide group on the horizontal plane is greater than the included angle of projections of two wind guide ribs in another wind guide group on the horizontal plane.

[0011] The wind guiding ribs include short wind guiding ribs and long wind guiding ribs whose length is greater than the short wind guiding ribs. The short wind guiding ribs are arranged between two adjacent long wind guiding ribs. At least part of the area projected by the short wind guiding ribs on the horizontal plane is located within the projection range of the heating element on the horizontal plane.

[0012] The wind guide inlet is arranged at the bottom of the wind guide cover, the wind guide cover and the reflector cover are spaced apart to allow air to enter, the wind guide ribs extend upward from the reflector cover, and the top end surface of the wind guide ribs has a higher vertical height than the bottom end surface of the wind guide cover.

[0013] The air fryer also includes an upper cover arranged above the heat dissipation cavity, and the wind guide ribs extend from the reflective cover to the upper cover; the wind guide ribs are arranged on the reflective cover or the upper cover.

[0014] A heat insulation cover is arranged on the upper side of the reflector cover, the heat dissipation cavity is located above the heat insulation cover, and the wind guiding ribs are connected to or abut against the heat insulation cover.

[0015] The air inlet is arranged at the periphery of the heat dissipation cavity, and at least part of the air guide ribs extend from the air guide cover to the periphery of the heat dissipation cavity.

[0016] The air fryer also includes an upper cover arranged above the heat dissipation cavity, the upper cover is provided with an accessory assembly cavity and a cover air inlet and a cover air outlet respectively connected to the accessory assembly cavity, the cover air inlet is connected to the outside atmosphere, and the heat dissipation air duct is connected to the cover air outlet and the air guide inlet, so that the airflow drawn by the rotating heat dissipation fan through the upper air inlet is discharged through the air guide outlet after flowing through the accessory assembly cavity, the cover air outlet, the heat dissipation air duct and the air guide cover in sequence.

[0017] Due to the adoption of the above technical solution, the technical effects achieved by this application are:

[0018] 1. In the air fryer provided by the present application, a plurality of air guide ribs are arranged on the periphery of the air guide cover in the heat dissipation cavity, and a heat dissipation air duct is formed between adjacent air guide ribs. During the rotation of the heat dissipation fan, the airflow drawn through the air inlet flows through each heat dissipation air duct and the air guide cover in sequence and then is discharged through the air guide outlet, forming a heat dissipation path in which the airflow passes through the air inlet, each heat dissipation air duct, the air guide cover, and the air guide outlet in sequence. Since the air guide ribs are arranged on the periphery of the air guide cover, the peripheral space of the air guide cover is divided into a plurality of mutually independent heat dissipation air ducts, and the heat dissipation air ducts can be used to guide and distribute the airflow to flow through the surfaces of a plurality of components that need heat dissipation, thereby improving the heat dissipation efficiency and reducing the temperature rise of the components. The air guide ribs play the role of combing and distributing the airflow. After the cold air enters the heat dissipation cavity, it is distributed to each heat dissipation duct and moves along the heat dissipation duct to the air guide cover. The airflow direction is stable and orderly, which effectively reduces the phenomenon of airflow short circuit and irregular collision of airflow, and ensures that each heat dissipation duct has enough airflow to pass through, providing sufficient heat dissipation for the components in the heat dissipation duct, improving the consistency of the heat dissipation effect of each area around the whole machine, and improving the problem of high temperature in local areas. After the airflow dissipates heat for the components in the heat dissipation duct, it finally flows into the air guide cover under the action of the heat dissipation fan and is discharged from the casing through the air guide outlet. Therefore, by setting air guide ribs, the heat dissipation efficiency can be greatly improved, thereby effectively improving the heat dissipation effect, reducing the surface temperature of the machine, and thus reducing the temperature resistance requirements of the casing material, which helps to reduce the casing design cost, and there is no need to improve the heat dissipation effect by adding additional blowers and fans.

[0019] 2. As a preferred embodiment of the present application, a plurality of air guide ribs surround the periphery of the air guide cover and are radially distributed, and the width of the heat dissipation duct gradually decreases from the end away from the air guide cover to the end close to the air guide cover. On the one hand, the air guide ribs are radially distributed, the structure is relatively regular, the heat dissipation duct formed is also relatively orderly, and the combing effect on the airflow is more obvious; on the other hand, according to the Venturi effect (this effect is manifested in the phenomenon that the flow velocity of the fluid increases when the restricted flow passes through a reduced flow section, and its flow velocity is inversely proportional to the flow section), the airflow entering the heat dissipation duct gradually increases in the process of flowing from the end away from the air guide cover to the air guide cover, so that the closer the heat dissipation duct is to the air guide cover, the higher the heat dissipation efficiency is obtained, which can not only improve the heat dissipation effect of the components in the heat dissipation duct, but also enable the airflow to accelerate the removal of the heat transferred upward by the heating element.

[0020] 3. As a preferred embodiment of the present application, when the projection of the air guide ribs on the horizontal plane is a straight line, the air guide ribs have a straight structure as a whole. The straight air guide ribs have a simple structure and are easy to process and form. In another preferred embodiment, the projection of the air guide ribs on the horizontal plane is an arc, so that the air guide ribs have an arc structure as a whole. The arc-shaped air guide ribs pre-rotate the airflow entering the heat dissipation duct, which can effectively reduce the noise generated during the flow of the airflow, reduce the loss along the way, and improve the heat dissipation efficiency.

[0021] 4. As a preferred embodiment of the present application, the included angles of the projections of any adjacent air guide ribs among the multiple air guide ribs on the horizontal plane are consistent, so that the air guide ribs are evenly distributed along the circumference of the air guide cover as a whole. Under the action of the heat dissipation fan, the airflow around the air guide cover is basically evenly distributed by the air guide ribs, and then is relatively evenly guided into the air guide cover by the air guide ribs through the heat dissipation air duct; in another preferred embodiment, any two adjacent air guide ribs form an air guide group, and the included angle of the projections of the two air guide ribs in at least one air guide group on the horizontal plane is greater than the included angle of the projections of the two air guide ribs in another air guide group on the horizontal plane. , so that the air guide ribs can be distributed radially and unevenly. In other words, the air guide ribs are distributed along the circumference of the air guide cover with different local densities. Therefore, the airflow can be artificially controlled according to different areas and different heat dissipation requirements. For example, the area where the components with high heat generation need more airflow can be appropriately reduced, the cross-sectional area of ​​the heat dissipation duct can be increased, the airflow can be increased, and the heat dissipation of the local area can be targetedly improved; while the area where the components with low heat generation do not need a large airflow, the density of the air guide ribs can be appropriately increased to increase the surface area of ​​the reflector and improve the heat dissipation efficiency.

[0022] 5. As a preferred embodiment of the present application, the short air guide ribs are arranged between two adjacent long air guide ribs, and at least part of the area projected on the horizontal plane by the short air guide ribs is located within the projection range of the heating element on the horizontal plane. The area of ​​the heat dissipation cavity directly above the heating element is closest to the heating element, has a higher temperature, and has higher heat dissipation requirements. Therefore, by arranging short air guide ribs with a higher density, the heat dissipation surface area of ​​the area can be increased, the heat dissipation efficiency can be improved, and the effect of heat dissipation fins can be played.

[0023] 6. As a preferred embodiment of the present application, the air guide inlet is arranged at the bottom of the air guide cover, the air guide cover and the reflector cover are spaced apart to allow air to enter, the air guide ribs extend upward from the reflector cover, the top end surface of the air guide ribs is higher in the vertical direction than the bottom end surface of the air guide cover, so that the top end surface of the air guide ribs is also higher than the position of the air guide inlet, so that adjacent heat dissipation ducts are isolated as much as possible, effectively avoiding airflow exchange between adjacent heat dissipation ducts, and reducing airflow chaos and collision. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0025] Figure 1 Assembly diagram of the air fryer provided for this application;

[0026] Figure 2 A cross-sectional view of an embodiment of the air fryer provided in the present application;

[0027] Figure 3 for Figure 2 A partial enlarged view of the structure at A in the middle;

[0028] Figure 4 A partial cross-sectional view of an embodiment of the air fryer provided by the present application;

[0029] Figure 5 An axonometric diagram of an embodiment of the air fryer provided in the present application;

[0030] Figure 6 A top view of an embodiment of the air fryer provided by the present application;

[0031] Figure 7 A top view of another embodiment of the air fryer provided in the present application;

[0032] Figure 8 A top view of another embodiment of the air fryer provided in the present application;

[0033] Fig. 9A schematic structural diagram of an embodiment of the heat shield provided in the present application;

[0034] Fig.10 A schematic structural diagram of an embodiment of the upper cover provided by the present application;

[0035] Fig.11 A cross-sectional view of an embodiment of the upper cover provided by the present application;

[0036] Fig.12 An exploded view of an embodiment of the upper cover provided in the present application.

[0037] List of parts and reference numerals:

[0038] 11 housing, 111 air inlet, 112 bottom air outlet, 12 reflector, 13 heating chamber, 14 heat dissipation chamber, 15 hot air fan, 16 heating element, 17 motor, 18 heat dissipation fan, 19 air guide cover, 191 air guide inlet, 192 air guide outlet, 20 air guide ribs, 201 short air guide ribs, 202 long air guide ribs, 21 upper cover, 211 accessory assembly chamber, 212 air inlet cover, 213 air outlet cover, 22 heat insulation cover, 23 air inlet channel, 24 liner. DETAILED DESCRIPTION

[0039] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0040] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0041] In addition, in the description of the present application, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "lateral", "longitudinal", etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0042] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] In the present application, unless otherwise clearly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0044] In the embodiment of the present application, an air fryer is provided. For the convenience of explanation and understanding, the following contents provided in the present application are all described based on the illustrated product structure. Of course, those skilled in the art can understand that the above structure is only used as a specific example and schematic description, and cannot constitute a specific limitation on the technical solution provided in the present application.

[0045] Reference Figures 1 to 12 As shown, an air fryer provided by the present application comprises a casing 11 and a reflector 12 arranged in the casing 11, the reflector 12 divides the internal space of the casing 11 into a heating chamber 13 and a heat dissipation chamber 14 located above the heating chamber 13, a hot air fan 15 and a heating element 16 are arranged in the heating chamber 13, a motor 17 for driving the hot air fan 15 and a heat dissipation fan 18 connected to the motor 17 are arranged in the heat dissipation chamber 14, an air inlet 111 connected to the heat dissipation chamber 14 is arranged on the casing 11, and a guide air inlet 111 is arranged in the heat dissipation chamber 14 The hood 19 and a plurality of air guide ribs 20 located on the periphery of the hood 19 are provided with an air guide inlet 191 and an air guide outlet 192 connected to the outside atmosphere. The heat dissipation fan 18 is arranged in the hood 19. A heat dissipation duct is formed between adjacent air guide ribs 20 among the plurality of air guide ribs 20. The heat dissipation duct is connected to the air inlet 111 and the air guide inlet 191, so that the airflow drawn by the rotating heat dissipation fan 18 through the air inlet 111 flows through each heat dissipation duct and the hood 19 in sequence and then is discharged through the air guide outlet 192. Figure 2 , Figure 6 as well as Fig.11 The arrows shown in the figure represent the direction of air flow in the housing.

[0046] In the air fryer of the present application, when in operation, the heating element 16 emits heat to heat the air into hot air, and the motor 17 drives the hot air fan 15 to rotate and blows the hot air quickly to the food placed in the heating chamber 13 for baking and cooking. The heat of the heating element 16 will be transferred to the heat dissipation chamber 14 above the reflector 12, causing the temperature of the components in the heat dissipation chamber 14 to rise. Therefore, a heat dissipation fan 18 is arranged in the heat dissipation chamber 14. When the motor 17 drives the hot air fan 15 to rotate, it also drives the heat dissipation fan 18 to rotate to dissipate the heat of the heat dissipation chamber 14. The heat dissipation fan 18 draws the external cold air flow into the heat dissipation chamber 14 through the air inlet 111. After the heat dissipation chamber 14 is cooled down, the air flow in the heat dissipation chamber 14 passes through the air guide cover 19 and is discharged to the outside of the casing 11, thereby reducing the temperature rise of the whole machine, so that the whole machine will not be damaged due to excessive temperature.

[0047] In addition, in the air fryer provided by the present application, a plurality of air guide ribs 20 are arranged on the periphery of the air guide cover 19 in the heat dissipation cavity 14, and a heat dissipation air duct is formed between adjacent air guide ribs 20. During the rotation of the heat dissipation fan 18, the airflow drawn through the air inlet 111 flows through each heat dissipation air duct and the air guide cover 19 in sequence and then is discharged through the air guide outlet 192, forming a heat dissipation path in which the airflow passes through the air inlet 111, each heat dissipation air duct, the air guide cover 19, and the air guide outlet 192 in sequence. Since the air guide ribs 20 are arranged on the periphery of the air guide cover 19, they divide the peripheral space of the air guide cover 19 into a plurality of mutually independent heat dissipation air ducts, and the heat dissipation air ducts can be used to guide and distribute the airflow to flow through the surfaces of a plurality of components that need heat dissipation, thereby improving the heat dissipation efficiency and reducing the temperature rise of the components. The air guide ribs 20 play the role of combing and distributing the airflow. After the cold air enters the heat dissipation cavity 14, it is distributed to each heat dissipation duct and moves along the heat dissipation duct to the air guide cover 19. The airflow direction is stable and orderly, which effectively reduces the phenomenon of airflow short circuit and the phenomenon of irregular collision of airflows, and ensures that each heat dissipation duct has enough airflow to pass through, providing sufficient heat dissipation for the components in the heat dissipation duct, improving the consistency of the heat dissipation effect of each area around the whole machine, and improving the problem of high temperature in local areas. After the airflow dissipates heat for the components in the heat dissipation duct, it finally flows into the air guide cover 19 under the action of the heat dissipation fan 18 and is discharged from the casing 11 through the air guide outlet 192. Therefore, by setting the air guide ribs 20, the heat dissipation efficiency can be greatly improved, thereby effectively improving the heat dissipation effect, reducing the surface temperature of the machine, thereby reducing the temperature resistance requirements of the casing 11 material, helping to reduce the design cost of the casing 11, and there is no need to improve the heat dissipation effect by adding additional blowers and fans.

[0048] In order to achieve a better guiding effect on the airflow, in a preferred embodiment, as Figure 5 and Figure 6 As shown, a plurality of air guide ribs 20 surround the periphery of the air guide cover 19 and are radially distributed, and the width of the heat dissipation duct gradually decreases from the end away from the air guide cover 19 to the end close to the air guide cover 19. It can be understood by those skilled in the art that, on the one hand, the air guide ribs 20 are radially distributed, the structure is relatively regular, the heat dissipation duct formed is also relatively orderly, and the combing effect on the airflow is more obvious; on the other hand, according to the Venturi effect (this effect is manifested in the phenomenon that the flow velocity of the fluid increases when the restricted flow passes through the reduced flow section, and the flow velocity is inversely proportional to the flow section), by making the width of the heat dissipation duct gradually decrease from the end away from the air guide cover 19 to the end close to the air guide cover 19, the airflow entering the heat dissipation duct flows from the end away from the air guide cover 19 toward the air guide cover 19, the flow velocity gradually increases, so that the closer the heat dissipation duct is to the air guide cover 19, the higher the heat dissipation efficiency is, which can not only improve the heat dissipation effect of the components in the heat dissipation duct, but also accelerate the airflow to take away the heat transferred upward by the heating element 16.

[0049] It should be noted that, under the premise that a plurality of air guide ribs 20 are radially distributed, the present application does not specifically limit the structural design of the air guide ribs 20 themselves, and any one of the following embodiments may be adopted:

[0050] Embodiment 1: Figure 6 As shown, the projection of the air guide rib 20 on the horizontal plane is an arc. Through this design, the air guide rib 20 is an arc-shaped structure as a whole. The arc-shaped air guide rib 20 pre-rotates the airflow entering the heat dissipation air duct, which can effectively reduce the noise generated during the flow of the airflow, reduce the loss along the way, and improve the heat dissipation efficiency. Specifically, the bending direction of all the air guide ribs 20 can be consistent. For example, all the air guide ribs 20 are bent in a counterclockwise direction around the air guide cover 19 to form an arc structure, or all the air guide ribs 20 are bent in a clockwise direction around the air guide cover 19 to form an arc, which is not limited here.

[0051] Embodiment 2: Although not shown in the attached drawings, the projection of the air guide ribs on the horizontal plane can also be made into a straight line. Through this design, the air guide ribs can be made into a straight structure as a whole in the heat dissipation cavity. The straight air guide ribs have a simple structure and are easy to process and shape, which simplifies the processing technology and helps to reduce processing costs.

[0052] It should also be noted that, under the premise that a plurality of air guide ribs 20 are radially distributed, the present application does not specifically limit the angle between any adjacent air guide ribs 20, and any one of the following embodiments may be adopted:

[0053] Embodiment 3: The included angles of the projections of any adjacent air guide ribs 20 on the horizontal plane are consistent. With this design, the air guide ribs 20 are evenly distributed along the circumference of the air guide cover 19. Under the action of the heat dissipation fan 18, the airflow around the air guide cover 19 is basically evenly distributed by the air guide ribs 20, and then relatively evenly guided by the air guide ribs 20 into the air guide cover 19 through the heat dissipation air duct.

[0054] Embodiment 4: Any two adjacent wind guide ribs 20 among a plurality of wind guide ribs 20 form a wind guide group, and the angle between the projections of the two wind guide ribs 20 in at least one wind guide group on the horizontal plane is greater than the angle between the projections of the two wind guide ribs 20 in another wind guide group on the horizontal plane. For example, the angle between the projections of the two wind guide ribs 20 in all wind guide groups on the horizontal plane can be gradually increased, so that the angles of the wind guide ribs 20 in all wind guide groups are different; for another example, the angles of the wind guide ribs 20 in multiple wind guide groups can be consistent, and there is at least one wind guide group with a wind guide rib 20 angle smaller than the above wind guide ribs 20 angles, for example Figure 7 As shown in , through this design, the air guide ribs 20 can be distributed radially and unevenly. In other words, the air guide ribs 20 are distributed circumferentially along the air guide cover 19 with different local densities. Therefore, the airflow can be artificially controlled according to different areas and different heat dissipation requirements. For example, the area where the components with high heat generation need more airflow can be appropriately reduced, the cross-sectional area of ​​the heat dissipation duct can be increased, the airflow can be increased, and the heat dissipation of the local area can be targetedly improved; and the area where the components with lower heat generation do not need a large airflow, the density of the air guide ribs 20 can be appropriately increased to increase the surface area of ​​the reflector 12 and improve the heat dissipation efficiency.

[0055] As a preferred implementation of the present application, Figure 8As shown, the air guide ribs 20 include short air guide ribs 201 and long air guide ribs 202 whose length is greater than that of the short air guide ribs 201. The short air guide ribs 201 are arranged between two adjacent long air guide ribs 202. At least part of the area projected on the horizontal plane by the short air guide ribs 201 is located within the projection range of the heating element 16 on the horizontal plane. It can be understood by those skilled in the art that the heating element 16 is usually arranged in the center relative to the reflector 12 and arranged directly below the air guide hood 19. The closer the area of ​​the heat dissipation cavity 14 is to the air guide hood 19, the closer it is to the heating element 16, the higher the temperature, and the higher the heat dissipation requirement. Therefore, by making at least part of the area projected on the horizontal plane by the short air guide ribs 201 be located within the projection range of the heating element 16 on the horizontal plane, in other words, making at least part of the area of ​​the short air guide ribs 201 be located directly above the heating element 16, the number of air guide ribs 20 at this location is increased, and the arrangement density of the air guide ribs 20 is increased, which can increase the heat dissipation surface area of ​​the area, improve the heat dissipation efficiency, and play the role of heat dissipation fins. In addition, the density of the short air-guiding ribs 201 is affected by the heating power of the heating element 16. If a high-power heating element 16 is provided, the density of the short air-guiding ribs 201 can be set to be larger, otherwise it can be set to be smaller.

[0056] As a preferred implementation of the present application, Figure 2 and Figure 3 As shown, the wind guide inlet 191 is provided at the bottom of the wind guide cover 19, the wind guide cover 19 is spaced apart from the reflector cover 12 to allow air to enter, the wind guide ribs 20 extend upward from the reflector cover 12, and the top end surface of the wind guide ribs 20 is higher in the vertical direction than the bottom end surface of the wind guide cover 19. Figure 3 As shown, the height H of the wind guide rib 20 extending upward from the reflector 12 and the distance h between the bottom end surface of the wind guide cover 19 and the reflector 12 are schematically depicted. In order to make the height of the top end surface of the wind guide rib 20 in the vertical direction higher than the height of the bottom end surface of the wind guide cover 19 in the vertical direction, it is necessary to make H>h. In this embodiment, the wind guide rib 20 is extended upward from the reflector 12, and the wind guide inlet 191 is arranged at the bottom of the wind guide cover 19. In order to make the wind guide rib 20 better guide the airflow from the air inlet 111 toward the wind guide inlet 191, by making the height of the top end surface of the wind guide rib 20 in the vertical direction higher than the height of the bottom end surface of the wind guide cover 19 in the vertical direction, the top end surface of the wind guide rib 20 is also higher than the position of the wind guide inlet 191, and the adjacent heat dissipation ducts are isolated as much as possible, so that the airflow in each heat dissipation duct only flows along the heat dissipation duct where it is located toward the wind guide inlet 191, effectively avoiding the exchange of airflow between adjacent heat dissipation ducts and reducing the phenomenon of chaotic collision of airflow.

[0057] It should be further explained that, although the air guide ribs 20 are arranged in the heat dissipation cavity 14, the present application does not specifically limit the arrangement position of the air guide ribs 20 in the heat dissipation cavity 14. For example, the air guide ribs 20 can be arranged on the reflector 12, or on the housing 11, or of course, at other suitable positions. Specifically, the present application can adopt any one of the following embodiments:

[0058] Embodiment 5: Figures 1 to 3 As shown, the air fryer further includes an upper cover 21 disposed above the heat dissipation cavity 14, and air guide ribs 20 extend from the reflector 12 to the upper cover 21; the air guide ribs 20 are disposed on the reflector 12. Specifically, the air guide ribs 20 can be integrally formed on the end surface of the reflector 12 facing the heat dissipation cavity 14. After the machine is assembled, the air guide ribs 20 extend toward the upper cover 21 and surround the periphery of the air guide hood 19. The height of the top surface of the air guide ribs 20 is higher than the position of the air guide inlet 191 of the reflector 12, so as to better guide the airflow, effectively avoid the exchange of airflow between adjacent heat dissipation air ducts, and reduce the phenomenon of chaotic collision of airflow.

[0059] Example 6: Figure 1 , Fig.10 As shown, the air fryer further includes an upper cover 21 disposed above the heat dissipation cavity 14, and the air guide ribs 20 extend from the reflector 12 to the upper cover 21; the air guide ribs 20 are disposed on the upper cover 21. Different from the solution in the aforementioned embodiment 5, the air guide ribs 20 are disposed on the upper cover 21 in this embodiment. Specifically, the air guide ribs 20 can be integrally formed on the bottom surface of the upper cover 21. After the machine is assembled, the air guide ribs 20 extend toward the reflector 12 and surround the periphery of the air guide 19. In order to enable the air guide ribs 20 to better guide the airflow, the height of the bottom end surface of the air guide ribs 20 in the vertical direction can be lower than the height of the air guide inlet 191 in the vertical direction, so as to effectively isolate each heat dissipation air duct and reduce the phenomenon of chaotic collision of airflow.

[0060] As a preferred implementation of the present application, Figures 2 to 4 As shown, all the aforementioned embodiments and examples of the present application can further provide a heat shield 22 on the upper side of the reflector 12, the heat dissipation cavity 14 is located above the heat shield 22, and the air guide ribs 20 are connected to or abut against the heat shield 22. By providing the heat shield 22, the heat transferred from the heating element 16 to the heat dissipation cavity 14 can be effectively blocked, and the temperature rise of the heat dissipation cavity 14 can be reduced. Figure 2 , Figure 3 and Fig. 9 As shown, taking the scheme of the present embodiment based on the aforementioned embodiment 5 as an example, the wind guide rib 20 is arranged on the reflector 12, and is further arranged on the heat insulation cover 22 provided on the reflector 12, and the wind guide rib 20 extends upward from the heat insulation cover 22 toward the upper cover 21; Fig.10Taking the scheme of the sixth embodiment as an example, the wind guiding ribs 20 are disposed on the upper cover 21 . The wind guiding ribs 20 extend downward from the upper cover 21 toward the reflector 12 , and further abut against the heat insulating cover 22 of the reflector 12 .

[0061] As a preferred implementation of the present application, Figure 2 and Figure 6 As shown, the air inlet 111 is arranged at the periphery of the heat dissipation cavity 14, and at least a portion of the air guide ribs 20 extend from the air guide cover 19 to the periphery of the heat dissipation cavity 14. Those skilled in the art will appreciate that by arranging the air inlet 111 at the periphery of the heat dissipation cavity 14, the air inlet 111 is located at the edge of the heat dissipation cavity 14, and the air guide cover 19 is usually located in the center of the heat dissipation cavity 14. Therefore, during the rotation of the heat dissipation fan 18, the airflow sucked in from the air inlet 111 enters from the edge of the heat dissipation cavity 14 and flows toward the central air guide cover 19 under the guidance of the air guide ribs 20, so that the airflow can basically pass through various areas in the heat dissipation cavity 14, effectively blowing air and cooling various parts and components in the heat dissipation cavity 14, which helps to improve the heat dissipation effect and reduce the temperature rise. In addition, on the basis that the air inlet 111 is arranged at the periphery of the heat dissipation cavity 14, at least a portion of the air guide ribs 20 extend from the air guide cover 19 to the periphery of the heat dissipation cavity 14, for example Figure 8 In the embodiment shown, the long air guide ribs 202 extend from the air guide cover 19 to the periphery of the heat dissipation cavity 14. Through this arrangement, the airflow sucked in from the air inlet 111 immediately enters the air guide channel surrounded by the adjacent air guide ribs 20, effectively preventing the airflow from running around in the heat dissipation cavity 14, which helps to improve the heat dissipation efficiency.

[0062] On this basis, in a preferred embodiment, Figure 2 As shown, a bottom air port 112 may be provided at the bottom of the housing 11, and an air inlet channel 23 is formed between the housing 11 and the inner liner 24 located therein, which connects the housing 11 and the air inlet 111, so that the airflow drawn by the rotating heat dissipation fan 18 through the bottom air port 112 flows through the air inlet channel 23 and the air inlet 111 in sequence, enters the heat dissipation cavity 14, and then passes through the heat dissipation air duct and the air guide cover 19 and is discharged through the air guide outlet 192. Specifically, when the heat dissipation fan 18 rotates, under the action of the negative pressure in the heat dissipation cavity 14, the external air will enter the housing 11 from the bottom air port 112, continuously and evenly pass through the air inlet channel 23 and enter the heat dissipation cavity 14, and when the airflow passes through the air inlet channel 23, it can also effectively dissipate the heat on the side of the housing 11 and reduce the temperature of the housing 11.

[0063] As a preferred implementation of the present application, Fig.11 and Fig.12As shown, on the basis of setting an upper cover 21 above the heat dissipation cavity 14, the upper cover 21 can also be provided with an accessory assembly cavity 211 and a cover air inlet 212 and a cover air outlet 213 respectively connected to the accessory assembly cavity 211, the cover air inlet 212 is connected to the outside atmosphere, and the heat dissipation air duct is connected to the cover air outlet 213 and the air guide inlet 191, so that the airflow drawn by the rotating heat dissipation fan 18 through the upper air inlet 111 flows through the accessory assembly cavity 211, the cover air outlet 213, the heat dissipation air duct and the air guide cover 19 in sequence and then is discharged through the air guide outlet 192. For example, components such as a power board, a control board, an operation panel, a water tank, etc. can be installed in the accessory assembly cavity 211. These components also need to dissipate heat to prevent excessive temperature from affecting their service life. Therefore, the heat dissipation air duct is connected to the cover air outlet 213 and the air guide inlet 191 so that the airflow drawn by the rotating heat dissipation fan 18 through the upper air inlet 111 flows through the accessory assembly cavity 211, the cover air outlet 213, the heat dissipation air duct and the air guide cover 19 in sequence and is then discharged through the air guide outlet 192, forming a heat dissipation path in which the airflow passes through the cover air inlet 212, the accessory assembly cavity 211, the cover air outlet 213, each heat dissipation air duct, the air guide cover 19, and the air guide outlet 192 in sequence. Specifically, when the cooling fan 18 rotates, under the action of the negative pressure in the cooling cavity 14, external air will enter the accessory assembly cavity 211 from the cover air inlet 212, and then continuously and evenly pass through the cover air outlet 213 and enter the cooling cavity 14. When the airflow passes through the accessory assembly cavity 211, it can also effectively dissipate the heat of the internal components of the accessory assembly cavity 211, thereby reducing the temperature of the upper cover 21.

[0064] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0065] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0066] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. An air fryer, comprising a casing and a reflector arranged in the casing, wherein the reflector divides the inner space of the casing into a heating chamber and a heat dissipation chamber located above the heating chamber, wherein a hot air fan and a heating element are arranged in the heating chamber, wherein a motor for driving the hot air fan and a heat dissipation fan connected to the motor are arranged in the heat dissipation chamber, wherein an air inlet connected to the heat dissipation chamber is arranged on the casing, and wherein: The heat dissipation cavity is also provided with an air guide cover and a plurality of air guide ribs located on the periphery of the air guide cover, the air guide cover is provided with an air guide inlet and an air guide outlet connected to the outside atmosphere, the heat dissipation fan is arranged in the air guide cover, and a heat dissipation air duct is formed between adjacent air guide ribs among the plurality of air guide ribs, and the heat dissipation air duct is connected with the air inlet and the air guide inlet, so that the airflow drawn by the rotating heat dissipation fan through the air inlet is discharged through the air guide outlet after flowing through each heat dissipation air duct and the air guide cover in sequence.

2. The air fryer according to claim 1, characterized in that: The plurality of air guiding ribs surround the periphery of the air guiding cover and are distributed radially, and the width of the heat dissipation air duct gradually decreases from one end away from the air guiding cover to one end close to the air guiding cover.

3. The air fryer according to claim 2, characterized in that: The projection of the wind guide rib on the horizontal plane is a straight line; Alternatively, the projection of the air guiding rib on the horizontal plane is an arc.

4. The air fryer according to claim 2, characterized in that: The included angles of projections of any adjacent wind-guiding ribs among the plurality of wind-guiding ribs on the horizontal plane are consistent; Alternatively, any two adjacent wind guide ribs among the multiple wind guide ribs form an wind guide group, and an angle between projections of two wind guide ribs in at least one wind guide group on the horizontal plane is greater than an angle between projections of two wind guide ribs in another wind guide group on the horizontal plane.

5. The air fryer according to claim 1, characterized in that: The wind guiding ribs include short wind guiding ribs and long wind guiding ribs whose length is greater than the short wind guiding ribs. The short wind guiding ribs are arranged between two adjacent long wind guiding ribs. At least part of the area projected by the short wind guiding ribs on the horizontal plane is located within the projection range of the heating element on the horizontal plane.

6. The air fryer according to claim 1, characterized in that: The wind guide inlet is arranged at the bottom of the wind guide cover, the wind guide cover and the reflector cover are spaced apart to allow air to enter, the wind guide ribs extend upward from the reflector cover, and the top end surface of the wind guide ribs has a higher vertical height than the bottom end surface of the wind guide cover.

7. The air fryer according to claim 1, characterized in that: It also includes an upper cover arranged above the heat dissipation cavity, and the wind guide ribs extend from the reflector cover to the upper cover; the wind guide ribs are arranged on the reflector cover or the upper cover.

8. The air fryer according to any one of claims 1 to 7, characterized in that: A heat insulation cover is arranged on the upper side of the reflector cover, the heat dissipation cavity is located above the heat insulation cover, and the wind guiding ribs are connected to or abut against the heat insulation cover.

9. The air fryer according to claim 1, characterized in that: The air inlet is arranged at the periphery of the heat dissipation cavity, and at least part of the air guide ribs extend from the air guide cover to the periphery of the heat dissipation cavity.

10. The air fryer according to claim 1, characterized in that: It also includes an upper cover arranged above the heat dissipation cavity, the upper cover is provided with an accessory assembly cavity and a cover air inlet and a cover air outlet respectively connected to the accessory assembly cavity, the cover air inlet is connected to the outside atmosphere, and the heat dissipation air duct is connected to the cover air outlet and the air guide inlet, so that the airflow drawn by the rotating heat dissipation fan through the upper air inlet is discharged through the air guide outlet after flowing through the accessory assembly cavity, the cover air outlet, the heat dissipation air duct and the air guide cover in sequence.

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