Air fryer

Abstract

This invention provides an air fryer, relating to the field of cooking equipment technology. The air fryer includes: a main body, within which a cooking cavity is included; and a draft assembly disposed within the main body, comprising an air duct connecting the cooking cavity and a space outside the main body. The air duct includes at least a separation section, wherein, in the radial direction of the cooking cavity, the wall surface of the separation section near the axis of the cooking cavity is the inner wall, and the wall surface away from the axis of the cooking cavity is the outer wall, with the radius of curvature of the inner wall being smaller than that of the outer wall. This invention achieves the technical effects of optimizing the air fryer structure, improving its practicality, and enhancing the quality of the cooked food.

Description

Technical Field

[0001] This invention relates to the field of cooking equipment technology, and more specifically, to an air fryer. Background Technology

[0002] In related technologies, in order to improve the quality of food, it is often necessary to introduce external air into the cooking cavity inside the cooking equipment so as to adjust the parameters inside the cooking cavity through the introduced air.

[0003] However, in actual use, the rate of external air introduction is low, which causes the humidity, oxygen content and other parameters in the cooking cavity to fail to meet the actual cooking requirements.

[0004] Therefore, overcoming the aforementioned technical deficiencies has become an urgent technical problem to be solved. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0006] Therefore, this invention proposes an air fryer.

[0007] In view of this, the air fryer provided by the present invention includes: a body, the body including a cooking cavity; an air intake assembly disposed on the body, the air intake assembly including an air duct, the air duct connecting the cooking cavity and the space outside the body; wherein, the air duct includes at least a separation section, in the radial direction of the cooking cavity, the wall surface of the separation section near the axis of the cooking cavity is the inner wall, and the wall surface away from the axis of the cooking cavity is the outer wall, and the radius of curvature of the inner wall is smaller than the radius of curvature of the outer wall.

[0008] This application defines an air fryer, which includes a body that serves as the frame structure for positioning, protecting, and supporting other working structures on the air fryer. A cooking cavity is formed within the body, where food is placed and processed into finished food.

[0009] The air fryer also includes a draft assembly housed within the main body. This draft assembly includes an air duct that connects the cooking chamber to the external space of the main body.

[0010] During operation, the gas flowing within the cooking cavity forms an internal circulating airflow. Due to the properties of fluid media, the pressure is lower in areas of high flow velocity. Because of the internal circulating airflow, the pressure inside the cooking cavity is lower than the external environment. Under this pressure difference, external gas is forced into the air duct, forming an intake airflow that flows from the second end to the first end of the duct. This intake airflow merges with the internal circulating airflow, allowing the cooking cavity to continuously draw in external air during operation. This external air helps regulate cooking parameters such as humidity and oxygen content within the cooking cavity to meet the specific cooking requirements of different foods.

[0011] Based on this, a separation section is provided in the air duct. Specifically, bends or angles can be set in the air duct to form the separation section. In the radial direction of the cooking cavity, the wall surface of the separation section closest to the axis of the cooking cavity is the inner wall, and the wall surface away from the axis of the cooking cavity is the outer wall. The radius of curvature of the inner wall is greater than that of the outer wall.

[0012] By setting a separation section with a larger inner radius of curvature and a smaller outer radius, the separation section has a large curvature angle. When gas flows through the separation section with a large curvature angle, the insufficient viscosity of the gas medium causes flow separation in the separation section. After flow separation, a low-pressure area with a relatively low gas velocity is generated on the inner side of the bend of the separation section. This low-pressure area increases the pressure difference between the air duct and the external space of the main body, thereby increasing the velocity of the introduced airflow and accelerating the introduction efficiency of the airflow. This ensures that the introduced airflow can adjust the parameter values ​​of the cooking cavity to the cooking requirement range, thus solving the technical problems of low air introduction efficiency and inability to meet cooking requirements in related technologies. This achieves the technical effect of optimizing the air fryer structure, improving the practicality of the air fryer, and improving the quality of the cooked food.

[0013] In addition, the air fryer provided by the present invention may also have the following additional technical features:

[0014] In some technical solutions of the present invention, specifically, the air duct includes: a first air duct, the first end of which is connected to the outside of the body; a second air duct, the first end and the second end of which are both connected to the cooking cavity; a separation section located in the second air duct; and the second end of the first air duct connected to the separation section.

[0015] In some technical solutions of the present invention, specifically, the second air duct extends along a curve, and at least a portion of the second air duct forms a separation section.

[0016] In some technical solutions of the present invention, specifically, the second air duct includes an inlet and an outlet, and in the flow direction from the inlet to the outlet, the curvature of the second air duct first increases and then decreases; on the second air duct, the area connected to the first air duct is close to the outlet of the second air duct.

[0017] In some technical solutions of the present invention, specifically, the second air duct includes an inlet and an outlet, and in the flow direction from the inlet to the outlet, the flow area of ​​the second air duct first decreases and then increases; on the second air duct, the area connected to the first air duct is close to the outlet of the second air duct.

[0018] In some technical solutions of the present invention, specifically, the air intake assembly includes: a pipe disposed in the body, the pipe enclosing a first air duct; and a guide member disposed in the cooking cavity, the guide member enclosing a second air duct, or the guide member and the side wall of the cooking cavity enclosing a second air duct.

[0019] In some technical solutions of the present invention, specifically, in the circumferential direction of the cooking cavity, the sidewall of the cooking cavity includes a straight wall and a corner; the guide is provided at the corner, the guide forms an inner wall, and the corner forms an outer wall; or the guide is provided at the straight wall, the guide forms an inner wall, and the straight wall forms an outer wall.

[0020] In some technical solutions of the present invention, specifically, the sidewall of the cooking cavity is annular; the guide member forms the inner wall, and the straight wall forms the outer wall.

[0021] In some technical solutions of the present invention, specifically, the air fryer further includes: a fan blade disposed in the cooking cavity; wherein the fan blade includes an air outlet side and an air return side; the inlet of the second air duct is located on the air outlet side of the fan blade, and the extension direction of the second air duct is consistent with the air outlet direction of the fan blade.

[0022] In some technical solutions of the present invention, specifically, the body further includes a heat dissipation cavity, which is connected to the outside of the body; the first end of the first air duct is connected to the heat dissipation cavity.

[0023] Additional aspects and advantages of the invention will become apparent in the following description or may be learned by practice of the invention. Attached Figure Description

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0025] Figure 1 A schematic diagram of the structure of an air fryer according to an embodiment of the present invention is shown;

[0026] Figure 2 An exploded view of an air fryer according to an embodiment of the present invention is shown;

[0027] Figure 3 A schematic diagram of the structure of an air intake assembly according to an embodiment of the present invention is shown;

[0028] Figure 4 A schematic diagram of a duct structure according to an embodiment of the present invention is shown;

[0029] Figure 5 A schematic diagram of a duct structure according to an embodiment of the present invention is shown;

[0030] Figure 6 A schematic diagram of a duct structure according to an embodiment of the present invention is shown;

[0031] Figure 7 A schematic diagram of a duct structure according to an embodiment of the present invention is shown.

[0032] in, Figures 1 to 7 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0033] 100 Air fryer, 110 Body, 1102 Cooking cavity, 1104 Heat dissipation cavity, 1106 Corner, 1108 Straight wall, 120 Air intake assembly, 122 Air duct, 1221 Separation section, 1222 First air duct, 1224 Second air duct, 1225 Inner wall, 1226 Outer wall, 124 Pipe, 126 Air guide, 130 Fan blade, 140 Heating component. Detailed Implementation

[0034] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0035] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0036] The following reference Figures 1 to 7 An air fryer according to some embodiments of the present invention is described.

[0037] like Figure 1 and Figure 2As shown, one embodiment of the present invention provides an air fryer 100, which includes: a body 110, the body 110 including a cooking cavity 1102; and a draft assembly 120 disposed in the body 110, the draft assembly 120 including an air duct 122, the air duct 122 connecting the cooking cavity 1102 and the space outside the body 110; wherein, the air duct 122 includes at least a separation section 1221, in the radial direction of the cooking cavity 1102 ( Figure 1 As shown by the middle arrow d), the wall surface of the separation segment 1221 near the axis of the cooking cavity 1102 is the inner wall 1225, and the wall surface away from the axis of the cooking cavity 1102 is the outer wall 1226. The radius of curvature of the inner wall 1225 is smaller than the radius of curvature of the outer wall 1226.

[0038] This application defines an air fryer 100, which includes a body 110. The body 110 is the frame structure of the air fryer 100, used for positioning, protecting and supporting other working structures on the air fryer 100. A cooking cavity 1102 is formed inside the body 110, where food is placed and processed into finished food.

[0039] The air fryer 100 also includes a draft assembly 120 disposed within the main body 110. The draft assembly 120 includes an air duct 122 that connects the cooking cavity 1102 to the space outside the main body 110.

[0040] During operation, the gas flowing within the cooking chamber 1102 forms an internal circulating airflow. Due to the characteristics of fluid media, the pressure is lower in areas of high flow velocity during flow. Because of the internal circulating airflow, the pressure within the cooking chamber 1102 is lower than the pressure of the external environment of the main body 110. Under the influence of this pressure difference, external gas is forced into the air duct 122, forming an introductory airflow within it. This introductory airflow flows from the second end of the air duct 122 to the first end. After entering the cooking chamber 1102, the introductory airflow merges with the internal circulating airflow, allowing the cooking chamber 1102 to continuously draw in external air during operation. This utilizes external air to regulate cooking parameters such as humidity and oxygen content within the cooking chamber 1102 to meet the cooking requirements of specific foods.

[0041] Based on this, a separation section 1221 is provided in the air duct 122. Specifically, a bend or fold can be provided in the air duct 122 to form the separation section 1221. In the radial direction of the cooking cavity 1102, the wall surface of the separation section 1221 near the axis of the cooking cavity 1102 is the inner wall 1225, and the wall surface away from the axis of the cooking cavity 1102 is the outer wall 1226. The radius of curvature of the inner wall 1225 is smaller than the radius of curvature of the outer wall 1226.

[0042] By setting the separation section 1221 with a smaller inner radius of curvature and a larger outer radius of curvature, the separation section 1221 has a large curvature angle. When the gas flows through the separation section 1221 with a large curvature angle, the gas medium viscosity is not high enough, which will cause the gas to undergo flow separation in the separation section 1221. After flow separation, a low-pressure area with a relatively low gas flow velocity will be generated on the inner side of the bend of the separation section 1221. This low-pressure area increases the pressure difference between the air duct 122 and the external space of the body 110, thereby increasing the flow velocity of the introduced airflow and accelerating the introduction efficiency of the introduced airflow. This ensures that the introduced airflow can adjust the parameter values ​​of the cooking cavity 1102 to the cooking demand range, thereby solving the technical problems of low air introduction efficiency and inability to meet cooking requirements in related technologies. This achieves the technical effect of optimizing the structure of the air fryer 100, improving the practicality of the air fryer 100, and improving the quality of the cooked food.

[0043] like Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments of the present invention, specifically, the air duct 122 includes: a first air duct 1222, the first end of which is connected to the outside of the body 110; a second air duct 1224, the first end and the second end of which are both connected to the cooking cavity 1102; a separation section 1221 located in the second air duct 1224; and the second end of the first air duct 1222 connected to the separation section 1221.

[0044] Figure 3 In the diagram, arrow a indicates the direction of the introduced airflow, and arrow b indicates the direction of the internal circulation airflow.

[0045] In this embodiment, the air duct 122 includes a first air duct 1222 and a second air duct 1224. The first end of the first air duct 1222 is connected to the space outside the body 110, and the second end of the first air duct 1222 is connected to the cooking cavity 1102. External airflow can enter the cooking cavity 1102 through the first air duct 1222 to regulate the temperature, humidity and oxygen content in the cooking cavity 1102.

[0046] The first end of the second air duct 1224 is connected to the cooking cavity 1102, and the second end of the second air duct 1224 is also connected to the cooking cavity 1102. The second end of the first air duct 1222 is connected to the middle section of the second air duct 1224. The first end of the first air duct 1222 extends toward the outer surface of the body 110 and eventually connects with the space outside the body 110. That is, the second air duct 1224 connects two different areas inside the cooking cavity 1102, and the first air duct 1222 connects the cooking cavity 1102 and the outside of the air fryer 100.

[0047] During operation, the gas flowing within the cooking cavity 1102 enters the second air duct 1224 from one of its first and second ends, and exits from the other end, forming an internal circulating airflow within the second air duct 1224. Due to the characteristics of fluid media, the pressure is lower in areas of high flow velocity during flow. Because of the internal circulating airflow, the pressure within the second air duct is lower than the pressure of the external environment of the body 110. Under this pressure difference, external gas is forced into the first air duct 1222, forming an externally introduced airflow within it. This externally introduced airflow flows from the second end to the first end of the first air duct 1222. After entering the second air duct 1224, the externally introduced airflow merges with the internal circulating airflow and ultimately flows into the cooking cavity 1102, enabling the cooking cavity 1102 to continuously draw in external air during operation. This allows for the use of external air to regulate cooking parameters such as humidity and oxygen levels within the cooking chamber 1102, thereby meeting the cooking requirements of specific foods.

[0048] Compared with the scheme where the second end of the first air duct 1222 is directly connected to the cooking cavity 1102, the internal circulation airflow can be accelerated inside the second air duct 1224, thereby increasing the pressure difference between the second air duct 1224 and the external environment, so as to increase the introduction rate of the external airflow, and thus improve the regulation effect of temperature, humidity and oxygen content in the cooking cavity 1102.

[0049] Based on this, the separation section 1221 is located in the middle section of the second air duct 1224, and the second end of the first air duct 1222 is connected to the separation section 1221. By setting the separation section 1221 on the second air duct 1224, the internal circulating airflow can generate flow separation within the second air duct 1224. This flow separation further reduces the pressure value within the second air duct 1224, thereby increasing the pressure difference between the second air duct 1224 and the external space of the main body 110. This allows external air to be rapidly introduced into the cooking cavity 1102 under this larger pressure difference. Furthermore, compared to the scheme of setting the separation section 1221 within the first air duct 1222, the airflow velocity within the second air duct 1224 is faster, the pressure is lower, and it is more conducive to forming flow separation, thereby achieving the technical effect of increasing the rate of external air introduction and improving the quality of the cooked food.

[0050] like Figure 2 As shown, in some embodiments of the present invention, specifically, the second air duct 1224 extends along a curve, and at least a portion of the second air duct 1224 forms a separation section 1221.

[0051] In this embodiment, the second air duct 1224 extends along a curve and is curved, so that a portion of the second air duct 1224 forms a separation section 1221, or the entire second air duct 1224 forms a separation section 1221. During the flow of the internal circulating airflow in the second air duct 1224, it bends along the extension direction of the second air duct 1224, resulting in flow separation. This creates a low-pressure region with relatively low flow velocity and relatively low pressure inside the second air duct 1224. Under the influence of this low-pressure region, the introduced airflow is accelerated into the second air duct 1224 to increase the air introduction rate.

[0052] Furthermore, compared to the embodiment that extends along a broken line and forms a separation section 1221 at the bend, the curved extension of the second air duct 1224 has less resistance to the internal circulation airflow, which is beneficial to increasing the flow velocity of the internal circulation airflow in the second air duct 1224 and can enhance the flow separation phenomenon in the second air duct 1224, thereby improving the air introduction efficiency.

[0053] like Figure 2 As shown, in some embodiments of the present invention, specifically, the second air duct 1224 includes an inlet and an outlet. In the flow direction from the inlet to the outlet, the curvature of the second air duct 1224 first increases and then decreases. On the second air duct 1224, the area connected to the first air duct 1222 is close to the outlet of the second air duct 1224.

[0054] In this embodiment, the curvature of the middle section of the second air duct 1224 is larger, while the curvature of both ends is smaller. Specifically, in the flow direction of the second air duct 1224, the curvature of the second air duct 1224 gradually increases first and then gradually decreases.

[0055] By increasing the radius of curvature of the connecting area, the flow separation phenomenon of the internal circulation airflow in the connecting area can be enhanced. This reduces the pressure in the connecting area, thereby increasing the pressure difference between the second air duct 1224 and the external space. This allows external air to quickly enter the second air duct 1224 under this pressure difference, thereby improving the efficiency of external air introduction and meeting the technical effect of cooking.

[0056] Based on this, the area on the second air duct 1224 that connects to the first air duct 1222 is a connecting area. Compared to the inlet of the second air duct 1224, the connecting area is closer to the outlet of the second air duct 1224. During the passage of the internal circulating airflow through the middle section of the second air duct 1224, flow separation occurs. Under the influence of this flow separation, the internal air pressure gradually decreases from the middle section of the second air duct 1224 to its outlet. By connecting the first air duct 1222 with the area near the outlet of the second air duct 1224, the pressure difference between the inside and outside can be effectively increased. This allows external air to quickly enter the second air duct 1224 under this pressure difference, thereby improving the efficiency of external air introduction and meeting the technical requirements of cooking.

[0057] like Figure 2 and Figure 3 As shown, in some embodiments of the present invention, specifically, the second air duct 1224 includes an inlet and an outlet. In the flow direction from the inlet to the outlet, the flow area of ​​the second air duct 1224 first decreases and then increases. On the second air duct 1224, the area connected to the first air duct 1222 is close to the outlet of the second air duct 1224.

[0058] In this embodiment, the flow area of ​​the second air duct 1224 first decreases and then increases in the flow direction, and the area of ​​the first air duct 1222 near the outlet is connected to the area of ​​the second air duct 1224.

[0059] Figure 3 In the diagram, S1 is the flow area at the inlet of the second air duct 1224, S2 is the flow area of ​​the connected area of ​​the second air duct 1224, and S3 is the flow area at the outlet of the second air duct 1224, where S1 > S2 and S3 > S2.

[0060] Based on this, the flow area in the middle section of the second air duct 1224 is smaller, while the flow area at both ends is larger. Specifically, in the flow direction of the second air duct 1224, the flow area of ​​the second air duct 1224 first gradually decreases and then gradually increases.

[0061] Based on Bernoulli's principle and the continuity equation, it is known that within the streamlines of the same medium, the fluid velocity is higher and the pressure is lower in regions with smaller flow areas. Therefore, by reducing the flow area of ​​the connecting region in the second air duct 1224, the velocity of the internal circulating airflow in that region can be increased, and the pressure in the connecting region can be reduced by increasing the velocity, thereby increasing the pressure difference between the inside and outside.

[0062] On the other hand, the area on the second air duct 1224 that connects to the first air duct 1222 is a connecting area. Compared to the inlet of the second air duct 1224, the connecting area is closer to the outlet of the second air duct 1224. By reducing the flow area, the internal circulating airflow can be accelerated before entering the connecting area. This not only increases the flow velocity in the connecting area but also enhances the flow separation phenomenon of the internal circulating airflow in the connecting section, thereby further reducing the pressure in the connecting area. This allows external air to quickly enter the second air duct 1224 under this pressure difference, thereby improving the efficiency of external air introduction and meeting the technical effect of cooking.

[0063] like Figure 2 As shown, in some embodiments of the present invention, specifically, the air intake assembly 120 includes: a pipe 124 disposed in the body 110, the pipe 124 enclosing a first air duct 1222; and a guide member 126 disposed in the cooking cavity 1102, the guide member 126 enclosing a second air duct 1224, or the guide member 126 and the side wall of the cooking cavity 1102 enclosing a second air duct 1224.

[0064] In this embodiment, the structure of the air intake assembly 120 is defined. Specifically, the air intake assembly 120 includes a pipe 124, which is connected to the main body 110, and an external air intake is provided on the inner surface of the cooking cavity 1102.

[0065] With the second air duct 1224 in close contact with the inner surface of the cooking cavity 1102, the second end of the pipe 124 is connected to the opening on the cooking cavity 1102. Specifically, an annular boss can be provided at the second end of the pipe 124 so that the annular boss abuts against the outer surface of the cooking cavity 1102.

[0066] With the second air duct 1224 located away from the inner surface of the cooking cavity 1102, the first end of the first air duct 1222 is inserted into the cooking cavity 1102 through the opening and communicates with the second air duct 1224 within the cooking cavity 1102. In this case, the opening can position the pipe 124, preventing the pipe 124 from becoming loose, misaligned, or even falling off.

[0067] Specifically, pipe 124 is arranged at the top of cooking cavity 1102 and extends from top to bottom. External airflow enters cooking cavity 1102 along the longitudinally extending pipe 124.

[0068] Based on this, the second air duct 1224 is fitted to the inner surface of the cooking cavity 1102. The air intake assembly 120 also includes a guide 126. A pipe can be selected as the guide 126 and assembled into the cooking cavity 1102. The inner surface of the pipe forms the second air duct 1224.

[0069] Alternatively, a plate can be selected as the air guide 126. The air guide 126 is set inside the cooking cavity 1102, and the air guide 126 and the inner surface of the cooking cavity 1102 together form the second air duct 1224. During the assembly process, the air guide 126 is welded to the inner surface of the cooking cavity 1102 to complete the assembly.

[0070] When a plate is selected as the air guide 126, the assembly complexity and positioning difficulty of the air intake assembly 120 can be reduced by enclosing the second air duct 1224 through the air guide 126 attached to the inner surface of the cooking cavity 1102, thereby reducing the production cost of the cooking equipment. At the same time, the air guide 126, which is attached to the inner surface of the cooking cavity 1102, can reduce the encroachment of the air intake assembly 120 on the cooking cavity 1102, reduce the probability that the air intake assembly 120 will damage the flow field characteristics of the cooking cavity 1102, and thus achieve the technical effect of improving the reliability of the cooking equipment and improving the quality of the cooked food.

[0071] like Figure 2 , Figure 4 and Figure 5 As shown, in some embodiments of the present invention, specifically, in the circumferential direction of the cooking cavity 1102 ( Figure 2 As shown by the middle arrow c), the sidewall of the cooking cavity 1102 includes a straight wall 1108 and a corner 1106. A guide 126 is provided at the corner 1106, forming an inner wall 1225 and the corner 1106 forming an outer wall 1226; or the guide 126 is provided at the straight wall 1108, forming an inner wall 1225 and the straight wall 1108 forming an outer wall 1226.

[0072] Figure 4 and Figure 5 In the diagram, arrow b indicates the direction of the internal airflow, arrow d indicates the radial direction of the cooking cavity 1102, and arrow e points to the area connecting the first air duct 1222 and the second air duct 1224.

[0073] In this embodiment, the sidewall of the cooking cavity 1102 includes multiple corners 1106 in the circumferential direction. Taking a square inner pot as an example, the sidewall of the cooking cavity 1102 forms four corners 1106 at the four corners.

[0074] Based on this, by fitting the guide 126 to the corner 1106, the shape of the corner 1106 can be reasonably utilized to form a separation section 1221 with a large curvature in the second air duct 1224, thereby increasing the pressure difference between the inside and outside through the flow separation phenomenon and improving the air introduction efficiency.

[0075] The flow guide 126 can also be fitted to the inner side of the straight wall 1108. Compared with the straight wall 1108, the curvature of the curved flow guide 126 is greater than that of the straight wall 1108. It is known that the larger the curvature, the smaller the radius of curvature. The radius of curvature of the straight wall 1108 is much larger than that of the curved flow guide 126. Therefore, the condition that the radius of curvature of the inner wall 1225 is smaller than that of the outer wall 1226 is satisfied, so that the internal circulation airflow can generate flow separation in the second air duct 1224.

[0076] Furthermore, during the assembly process, the shape-fitting corner 1106 can also provide auxiliary positioning for the guide 126, thereby reducing the assembly difficulty of the guide 126 and improving the positioning accuracy of the guide 126.

[0077] like Figure 6 As shown, in some embodiments of the present invention, specifically, the sidewall of the cooking cavity 1102 is annular; the guide member 126 forms the inner wall 1225, and the straight wall 1108 forms the outer wall 1226.

[0078] Figure 6 In the diagram, arrow b indicates the direction of the internal airflow, arrow d indicates the radial direction of the cooking cavity 1102, and arrow e points to the area connecting the first air duct 1222 and the second air duct 1224.

[0079] In this embodiment, the sidewall of the cooking cavity 1102 is annular, and the inner surface of the sidewall of the cooking cavity 1102 is annular.

[0080] Based on this, a curved plate is selected as the guide 126, and the radius of curvature of the guide 126 is smaller than the radius of curvature of the side wall of the cooking cavity 1102, so as to ensure that the internal circulation airflow generates a flow separation phenomenon between the guide 126 and the side wall of the cooking cavity 1102, thereby increasing the pressure difference between the inside and outside through the flow separation phenomenon and improving the air introduction efficiency.

[0081] like Figure 7 As shown, in a specific embodiment of this application, the side wall of the cooking cavity 1102 is concave, and the plate-shaped guide 126 is disposed in the concave area. The internal circulating airflow is separated between the two, and the flow area of ​​the second air duct 1224 first decreases and then increases. The pressure can be further reduced by increasing the flow velocity.

[0082] Figure 7 In the diagram, arrow b indicates the direction of the internal airflow, arrow d indicates the radial direction of the cooking cavity 1102, and arrow e points to the area connecting the first air duct 1222 and the second air duct 1224.

[0083] like Figure 1 and Figure 2As shown, in some embodiments of the present invention, the air fryer 100 specifically includes: a fan blade 130 disposed in the cooking cavity 1102; and a heating element 140 disposed opposite to the fan blade 130.

[0084] In this embodiment, the air fryer 100 also includes a fan blade 130 and a heating element 140.

[0085] Specifically, the fan blade 130 is installed inside the cooking chamber 1102, and the motor is installed outside the cooking chamber 1102. The motor shaft is connected to the fan blade 130 inside the cooking chamber 1102. After being powered on, the motor drives the fan blade 130 to rotate, and the rotating fan blade 130 can form an internal circulating airflow inside the cooking chamber 1102.

[0086] The heating element 140 is arranged opposite to the fan blade 130. When the heat pipe is selected as the heating element 140, the heating element 140 is also arranged in the cooking cavity 1102. Specifically, it can be installed around the fan blade 130 or on the upper and lower sides of the fan blade 130. The heat pipe can heat the air around the fan blade 130, thereby forming a high-temperature internal circulation airflow with the fan blade 130, and then heating the food through the high-temperature internal circulation airflow.

[0087] Alternatively, an electromagnetic coil can be selected as the heating element 140. After being powered on, the magnetically conductive fan blades 130 are heated under the magnetic field generated by the electromagnetic coil, thereby blowing out a high-temperature internal circulation airflow through the fan blades 130, which in turn heats the food.

[0088] like Figure 2 As shown, in some embodiments of the present invention, specifically, the fan blade 130 includes an air outlet side and a return air side; the inlet of the second air duct 1224 is located on the air outlet side of the fan blade 130, and the extension direction of the second air duct 1224 is consistent with the air outlet direction of the fan blade 130.

[0089] In this embodiment, the fan blade 130 includes an air outlet side and a return air side. The fan blade 130 can be a centrifugal fan, with the air outlet side located on the periphery of the centrifugal fan and the return air side located on the side facing the centrifugal fan.

[0090] The inlet of the second air duct 1224 is located on the periphery of the centrifugal fan, so that the internal circulating airflow blown by the centrifugal fan can smoothly enter the second air duct 1224, ensuring that there is a sufficiently large pressure difference between the second air duct 1224 and the external space of the main body 110.

[0091] Based on this, the second air duct 1224 extends around the centrifugal fan along the circumferential direction of the centrifugal fan. By extending the second air duct 1224 along the circumferential direction of the centrifugal fan, the extension direction of the second air duct 1224 can be consistent with the flow direction of the internal circulating airflow blown out by the centrifugal fan, thereby reducing the resistance of the second air duct 1224 to the internal circulating airflow, increasing the gas flow rate in the second air duct 1224, and further increasing the introduction rate of external airflow by increasing the pressure difference between the second air duct 1224 and the external space of the body 110.

[0092] like Figure 1 As shown, in some embodiments of the present invention, specifically, the body 110 further includes a heat dissipation cavity 1104, which is connected to the outside of the body 110; the first end of the first air duct 1222 is connected to the heat dissipation cavity 1104.

[0093] In this embodiment, a heat dissipation cavity 1104 is also formed inside the main body 110, and an outlet is provided on the main body 110. The heat dissipation cavity 1104 is connected to the space outside the main body 110 through the outlet. During cooking, the heat dissipation cavity 1104 can guide the heat generated by the motor, heating element 140 and other structures to the outside of the main body 110 through airflow for continuous heat dissipation, so that the working structure inside the main body 110 can be kept within a safe temperature range, avoiding overheating and damage to the cooking equipment.

[0094] Based on this, the first end of the first air duct 1222 is connected to the heat dissipation cavity 1104, and the first air duct 1222 is connected to the space outside the main body 110 through the heat dissipation cavity 1104. During operation, external air can enter the heat dissipation cavity 1104 from the heat dissipation port on the main body 110, and enter the first air duct 1222 under the action of pressure difference.

[0095] The heat dissipation cavity 1104 is mostly arranged on the outside of the cooking cavity 1102. By connecting the first air duct 1222 to the heat dissipation cavity 1104, the length of the first air duct 1222 can be reduced, thereby reducing the structural complexity of the air intake assembly 120. Specifically, a hole can be made in the reflector above the inner pot to form the first air duct 1222. This achieves the technical effect of reducing the structural complexity of the cooking equipment and reducing the production cost of the cooking equipment.

[0096] On the other hand, the temperature inside the heat dissipation cavity 1104 is relatively high. Connecting the first air duct 1222 to the heat dissipation cavity 1104 can reduce the heat loss of the cooking cavity 1102 by introducing air, thereby achieving the technical effect of improving heating efficiency and reducing the energy consumption of the cooking equipment.

[0097] It should be clarified that in the claims, description, and accompanying drawings of this invention, the term "plural" refers to two or more. Unless otherwise explicitly defined, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description process, not to indicate or imply that the device or element referred to must have the described specific orientation, or be constructed and operated in a specific orientation. Therefore, these descriptions should not be construed as limiting the invention. The terms "connection," "installation," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection between multiple objects, a detachable connection between multiple objects, or an integral connection; it can be a direct connection between multiple objects or an indirect connection between multiple objects through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this invention can be understood based on the specific circumstances of the above data.

[0098] In the claims, description, and accompanying drawings of this invention, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In the claims, description, and accompanying drawings of this invention, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0099] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An air fryer, characterized in that, include: The main body includes a cooking cavity; A draft assembly is disposed on the main body, and the draft assembly includes an air duct that connects the cooking cavity and the space outside the main body. The air duct includes at least a separation section. In the radial direction of the cooking cavity, the wall surface of the separation section near the axis of the cooking cavity is the inner wall, and the wall surface away from the axis of the cooking cavity is the outer wall. The radius of curvature of the inner wall is smaller than the radius of curvature of the outer wall.

2. The air fryer according to claim 1, characterized in that, The air duct includes: The first air duct, the first end of the first air duct is connected to the outside of the main body; The second air duct has a first end and a second end that are both connected to the cooking cavity. The separation section is located in the second air duct, and the second end of the first air duct is connected to the separation section.

3. The air fryer according to claim 2, characterized in that, The second air duct extends along the curve, and at least a portion of the second air duct forms the separation section.

4. The air fryer according to claim 3, characterized in that, The second air duct includes an inlet and an outlet, and in the flow direction from the inlet to the outlet, the curvature of the second air duct first increases and then decreases; On the second air duct, the area that connects to the first air duct is close to the outlet of the second air duct.

5. The air fryer according to claim 3, characterized in that, The second air duct includes an inlet and an outlet, and in the flow direction from the inlet to the outlet, the flow area of ​​the second air duct first decreases and then increases; On the second air duct, the area that connects to the first air duct is close to the outlet of the second air duct.

6. The air fryer according to claim 2, characterized in that, The air intake assembly includes: The pipe is located on the body and encloses the first air duct; A flow guide is disposed inside the cooking cavity, and the flow guide encloses the second air duct, or the flow guide and the side wall of the cooking cavity enclose the second air duct.

7. The air fryer according to claim 6, characterized in that, In the circumferential direction of the cooking cavity, the sidewalls of the cooking cavity include straight walls and corners; The flow guide is located at the corner, the flow guide forms the inner wall, and the corner forms the outer wall; or The flow guide is disposed at the straight wall, the flow guide forms the inner wall, and the straight wall forms the outer wall.

8. The air fryer according to claim 7, characterized in that, The sidewalls of the cooking cavity are annular; The flow guide forms the inner wall, and the straight wall forms the outer wall.

9. The air fryer according to claim 2, characterized in that, Also includes: Fan blades, the fan blades being disposed within the cooking cavity; The fan blades include an air outlet side and an air return side; The inlet of the second air duct is located on the air outlet side of the fan blade, and the extension direction of the second air duct is consistent with the air outlet direction of the fan blade.

10. The air fryer according to any one of claims 2 to 9, characterized in that, The body also includes a heat dissipation cavity, which is in communication with the outside of the body; The first end of the first air duct is connected to the heat dissipation cavity.

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