An air fryer

Abstract

The present invention discloses an air fryer, comprising a main structure, a top hot air structure and a bottom hot air structure, wherein the main structure is formed with a cooking cavity, a top air passage cavity, a bottom air passage cavity, a top air inlet, a bottom air inlet and an air outlet, wherein the top hot air structure is located in the cooking cavity and / or the top air passage cavity, and is used to form hot air in the top air passage cavity and transmit the hot air to the cooking cavity, and the bottom hot air structure is located in the bottom air passage cavity, and is used to form hot air in the bottom air passage cavity and transmit the hot air to the top air passage cavity. The air fryer can improve cooking efficiency, simplify operation and fry and roast food with better taste.

Description

Technical Field

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

[0002] Nowadays, cooking appliances that can use hot air circulation to air fry and bake food are very popular.

[0003] As a typical appliance among the above cooking appliances, air fryers are widely used due to their wide cooking range, ease of use, environmental protection, short cooking time, etc. As the core component of the air fryer, the hot air structure plays a vital role in the frying and baking effects of food.

[0004] Existing air fryers generally only have a set of hot air structure at the top, and the hot air structure is mainly composed of a fan and a heating tube. After the air fryer is started, the heating tube begins to heat up, and at the same time the fan absorbs the surrounding air and passes through the heating tube to realize hot air circulation. Within a period of time after the air fryer is started, most of the air absorbed by the fan is cold air. Affected by the cold air, it takes a long time for the heating tube to reach the specified temperature, which affects the rising time of the overall temperature of the hot air circulation, resulting in poor cooking efficiency of the air fryer; on the other hand, based on the design of a separate hot air structure on the top, the hot air circulation is not sufficient, and the temperature in the frying barrel space is uneven. When frying or baking food, it is easy to have a phenomenon that some parts are fried crispy while other parts are still not cooked or boiled, which makes the food taste poor. As a result, frying and baking increase the process of turning the food over, the operation is cumbersome, and the baking time is also prolonged, which also affects the cooking efficiency of the air fryer. Summary of the invention

[0005] The invention provides an air fryer, aiming to solve the technical problems of low cooking efficiency, poor taste and complicated operation of the existing air fryer.

[0006] According to an embodiment of the present invention, the air fryer comprises:

[0007] The main structure is formed with a cooking cavity, a top air cavity communicating with the cooking cavity, a bottom air cavity communicating with the top air cavity, a top air inlet communicating with the top air cavity, and a bottom air inlet communicating with the bottom air cavity, and the main structure is further formed with an exhaust port, and in the cooking cavity and the top air cavity, the exhaust port is at least connected to the cooking cavity;

[0008] A top hot air structure, located in the cooking cavity and / or the top air passage cavity, for forming hot air in the top air passage cavity and transmitting the hot air to the cooking cavity;

[0009] And a bottom hot air structure is located in the bottom air passage cavity and is used to form hot air in the bottom air passage cavity and transmit the hot air to the top air passage cavity.

[0010] In one of the embodiments, the main structure includes a skeleton structure having a pull-out opening and a cooking pot body that can be loaded into the skeleton structure through the pull-out opening, and the bottom air cavity is formed by the space enclosed by the cooking pot body and the skeleton structure, and the air in the bottom air cavity can enter the top air cavity through the cooking pot body.

[0011] In one embodiment, the skeleton structure includes an external frame and a rack, and the rack is disposed in the external frame to separate the external frame into the cooking cavity and the top air passage cavity which are interconnected.

[0012] In one embodiment, the outer periphery of the frame is provided with convection holes, the cooking pot body is formed with an air flow channel connected with the convection holes, and the bottom air cavity is connected to the top air cavity through the convection holes and the air flow channel.

[0013] In one embodiment, the cooking pot body includes a pot body and an insulating barrel wall connected to the pot body, and the airflow channel is formed in the insulating barrel wall.

[0014] In one embodiment, a cavity is formed inside the insulating barrel wall, a hot air inlet is provided on the side of the insulating barrel wall facing the cooking cavity, a connecting port is provided on the top of the insulating barrel wall, and the air flow channel includes a hot air channel formed by the hot air inlet, the cavity and the connecting port.

[0015] In one of the embodiments, the heat-insulating barrel wall is further provided with a cold air inlet, and the air flow channel further comprises a cold air channel formed by the cold air inlet, the cavity and the connecting port.

[0016] In one of the embodiments, the hot air inlet is arranged in the middle of the bottom of the insulating barrel wall, and the cold air inlet is arranged on both sides of the bottom of the insulating barrel wall.

[0017] In one embodiment, the insulating barrel wall includes an inner wall and an outer wall that are interlocked, the inner wall and the outer wall form the cavity, the hot air inlet and the cold air inlet are opened on the inner wall, and a wind shield located in the cavity is also arranged on the inner wall and / or the outer wall, and the wind shield is used to separate the cold air channel and the hot air channel.

[0018] In one of the embodiments, heat transfer holes are formed on other sides of the outer periphery of the frame, so that the heat in the bottom air cavity is transferred outward through the pot body, the heat insulating enclosure and the frame.

[0019] In one embodiment, the external frame includes a base assembly, and the base assembly includes a bottom cover and a bottom insulation plate arranged on the bottom cover, and the bottom insulation plate is sealed on the bottom cover to form a buffer cavity, and outside air can enter the bottom air cavity through the buffer cavity.

[0020] Implementing the embodiments of the present invention will have the following beneficial effects:

[0021] According to the air fryer in the above embodiment, based on the design of the top hot air structure and the bottom hot air structure, when the air fryer is started, the bottom hot air structure can transport a certain amount of hot air to the top air passage cavity, and the hot air can be utilized by the top hot air structure. At this time, the air source utilized by the top hot air structure includes not only cold air but also hot air, so that the overall temperature of the hot air circulation formed between the top air inlet, the top air passage cavity, the cooking cavity and the exhaust port can rise rapidly. At the same time, the dual effects of the top hot air structure and the bottom hot air structure can intensify the intensity of the above-mentioned hot air circulation, and the hot air circulation can be more sufficient, so that the temperature in the cooking cavity is more uniform, which is not only conducive to frying and roasting food with better taste, but also there is no need to worry about the occurrence of uneven heating of food due to failure to turn the food over during frying and roasting, which can simplify the operation. The overall temperature of the hot air circulation can rise rapidly, and the intensified intensity of the hot air circulation can improve the cooking efficiency of the air fryer. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] in:

[0024] Figure 1 An external outline diagram of an air fryer provided according to an embodiment of the present invention is shown;

[0025] Figure 2 An exploded schematic diagram of an air fryer provided according to an embodiment of the present invention is shown;

[0026] Figure 3 Another exploded schematic diagram of an air fryer provided according to an embodiment of the present invention is shown;

[0027] Figure 4 A cross-sectional view of an air fryer provided according to an embodiment of the present invention is shown;

[0028] Figure 5 A schematic structural diagram of a connecting ring provided according to an embodiment of the present invention is shown;

[0029] Figure 6 A schematic structural diagram of a cooking pot body provided in an embodiment of the present invention is shown;

[0030] Figure 7 An exploded schematic diagram of a cooking pot body provided in an embodiment of the present invention is shown;

[0031] Figure 8 A schematic structural diagram of an inner wall of a cooking pot body provided according to an embodiment of the present invention is shown.

[0032] Description of main component symbols:

[0033] 100-main structure; 101-cooking cavity; 102-top air cavity; 103-bottom air cavity; 104-top air inlet; 105-bottom air inlet; 106-exhaust vent; 110-external frame; 120-frame; 130-cooking pot body; 140-insulated enclosure; 111-drawing port; 112-top cover; 113-body; 114-base assembly; 121-convection hole; 122-heat transfer hole; 123-connecting ring; 124-shell frame; 125 - heat insulation cover; 131- pot body; 132- handle; 133- heat insulation barrel wall; 1141- bottom cover; 1142- bottom insulation board; 1143- inner bottom board; 1231- convection part; 1232- double ring structure; 1251- hot air outlet; 1331- hot air inlet; 1332- cold air inlet; 1333- communication port; 1334- inner wall; 1335- outer wall; 1336- wind shield; 1232a- inner ring; 1232b- outer ring; 1232c- connecting rib;

[0034] 200-top hot air structure; 210-motor; 220-hot air fan; 230-top heating pipe;

[0035] 300-Bottom hot air structure;

[0036] 400-Cooling fan. DETAILED DESCRIPTION

[0037] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Preferred embodiments of the present invention are provided in the drawings. However, the present invention can be implemented in many other different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0038] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0040] An embodiment of the present invention provides an air fryer, which adopts a double hot air structure. Through the combined effect of the double hot air structure, the air fryer can be heated up quickly in a short time, and the internal temperature can also be more balanced.

[0041] In the embodiments of the present invention, please refer to Figures 1 to 4 The air fryer includes a main structure 100, a top hot air structure 200 and a bottom hot air structure 300.

[0042] The main structure 100 mainly utilizes a solid structure to form each cavity, and realizes the connection between the corresponding cavity and the outside or the connection between the cavities by opening, opening windows, opening holes, etc. at the appropriate positions of the corresponding solid structure.

[0043] The main structure 100 is formed with a cooking cavity 101, a top air cavity 102 connected to the cooking cavity 101, a bottom air cavity 103 connected to the top air cavity 102, a top air inlet 104 connected to the top air cavity 102, and a bottom air inlet 105 connected to the bottom air cavity 103.

[0044] It can be understood that the air fryer mainly utilizes hot air circulation to fry and bake food. Here, the top air inlet 104 and the top air chamber 102 can be used as a place for hot air circulation, and the bottom air inlet 105 and the bottom air chamber 103 can be used as another place for hot air circulation. The hot air generated by these two places can enter the cooking cavity 101 to fry and bake the food in the cooking cavity 101. The entry methods are different. The former enters directly, and the latter enters indirectly.

[0045] In order to ensure the balance of hot air circulation, the main structure 100 is further formed with an exhaust port 106 . In the cooking cavity 101 and the top air passage cavity 102 , the exhaust port 106 is at least connected to the cooking cavity 101 .

[0046] The exhaust port 106 is used to discharge the excess heat in the air fryer in time to keep the heat in the air fryer in a certain equilibrium state. The exhaust port 106 can be connected to the cooking cavity 101 or the top air cavity 102. The exhaust port 106 is connected to the cooking cavity 101 to take away the steam generated during the cooking process of food in the cooking cavity. The exhaust port 106 is connected to the top air cavity 102 to increase the air intake of the top air cavity 102, thereby realizing the overall heat dissipation of the fryer body.

[0047] The top hot air structure 200 is located in the cooking cavity 101 and / or the top air passage cavity 102 , and is used to form hot air in the top air passage cavity 102 and transmit the hot air to the cooking cavity 101 .

[0048] The top hot air structure 200 can utilize the air entering the top air cavity 102 to form a hot air circulation, wherein a portion of the air comes from the top air inlet 104 , and another portion of the air comes from the bottom air cavity 103 connected to the top air cavity 102 .

[0049] The bottom hot air structure 300 is located in the bottom air passage cavity 103 , and is used to form hot air in the bottom air passage cavity 103 and transmit the hot air to the top air passage cavity 102 .

[0050] The bottom hot air structure 300 may adopt some components or structures capable of generating heat, such as a heating pipe. When a heating pipe is adopted, the heating pipe is preferably arranged in a curved and circuitous manner to increase the contact area with the air.

[0051] The air used by the bottom hot air structure 300 comes from the bottom air inlet 105 connected to the bottom air cavity 103. The air entering the bottom air cavity 103 is heated by the bottom hot air structure 300 and then transported from bottom to top to the top air cavity 102.

[0052] It should be noted that the air fryer generally relies on the internal motor to drive the fan blades to rotate to form a negative pressure inside the air fryer. Based on the negative pressure, the outside air will spontaneously enter the air fryer through the top air inlet 104 and the bottom air inlet 105. After that, the air will be driven by the fan blades and the physical structure of the air fryer to form a hot air circulation. The motor will generally have a climbing phenomenon when it is started. In other words, for a period of time after the air fryer is just started, the negative pressure inside the air fryer is relatively low. At this time, for the bottom air cavity 103, according to the principle of air convection, only the hot air inside the bottom air cavity 103 will flow to the top air cavity 102. After the motor works stably, the negative pressure inside the air fryer is increased. At this time, both the hot air and the cold air in the bottom air cavity 103 will enter the top air cavity 102.

[0053] In the embodiment of the present invention, based on the design of the top hot air structure 200 and the bottom hot air structure 300, when the air fryer is started, the bottom hot air structure 300 can deliver a certain amount of hot air to the top air passage cavity 102, and the hot air can be used by the top hot air structure 200. At this time, the air source used by the top hot air structure 200 includes not only cold air but also hot air, so that the overall temperature of the hot air circulation formed between the top air inlet 104, the top air passage cavity 102, the cooking cavity 101 and the exhaust port 106 can rise rapidly. At the same time, the dual functions of the top hot air structure 200 and the bottom hot air structure 300 can intensify the intensity of the above-mentioned hot air circulation, and the hot air circulation can be more sufficient, making the temperature in the cooking cavity 101 more uniform, which is not only conducive to frying and baking food with better taste, but also in the process of frying and baking food, there is no need to worry about the occurrence of uneven heating of food due to failure to turn the food over, which can simplify the operation. The overall temperature of the hot air circulation can rise quickly, and the intensified intensity of the hot air circulation can improve the cooking efficiency of the air fryer.

[0054] The above description only explains the promoting effect of the bottom hot air structure 300 on the entire hot air circulation from the aspect of air convection, but it can be understood that heat transfer can also be achieved through heat conduction. At this time, by reasonably selecting the solid part of the main structure 100 and using materials that are easy to conduct heat to make the corresponding components, the heat in the bottom air cavity 103 can also enter the top air cavity 102 or the cooking cavity 101 through heat conduction. This part of heat will also promote the uniformity of the temperature in the cooking cavity 101, which is beneficial to improving cooking efficiency and promoting the frying and roasting effects of food.

[0055] In one embodiment, please refer to Figures 1 to 4The main structure 100 includes a skeleton structure with a drawer opening 111 and a cooking pot body 130 that can be loaded into the skeleton structure through the drawer opening 111. The bottom air cavity 103 is formed by the space surrounded by the cooking pot body 130 and the skeleton structure. The air in the bottom air cavity 103 can enter the top air cavity through the cooking pot body 130.

[0056] It should be understood here that the skeleton structure is the part of the main structure 100 excluding the cooking pot body 130 . The skeleton structure serves as a structural support and mounting carrier of the air fryer, enabling the air fryer to maintain the required strength and providing support for other components of the air fryer.

[0057] It is understandable that the specific type and structure of the skeleton structure are not limited, and it can be set according to needs, and its material can also be selected according to needs.

[0058] In a specific embodiment, please refer to Figures 1 to 4 The skeleton structure includes an external frame 110 and a rack 120. The rack 120 is arranged in the external frame 110 to separate the external frame 110 into a cooking cavity 101 and a top air passage cavity 102 which are interconnected.

[0059] The skeleton structure also includes an insulating enclosure 140, which is connected between the bottom of the external frame 110 and the frame 120. The cooking pot body 130 can be loaded into the cooking cavity 101 and a gap is left between the bottom of the external frame 110. The insulating enclosure 140 can be wrapped around the outer periphery of the cooking pot body 130. The insulating enclosure 140, the cooking pot body 130, the frame 120 and the external frame 110 together form a bottom air cavity 103. The outer periphery of the frame 120 is provided with convection holes 121. The cooking pot body 130 is formed with an air flow channel connected to the convection holes 121. The bottom air cavity 103 is connected to the top air cavity 102 through the gap, the convection holes 121 and the air flow channel.

[0060] After the cooking pot body 130 is loaded into the cooking cavity 101 and the air fryer is started, the heated hot air in the bottom air cavity 103 can enter the top air cavity 102 through the air flow channel and the convection holes 121. This part of the hot air will be used by the top hot air structure 200. When the air fryer reaches a certain equilibrium state, the excess hot air will be discharged through the exhaust port 106. This part of the process is the convection effect. Through this convection effect, not only can the aforementioned purposes of improving cooking efficiency, simplifying operation and improving food taste be achieved, but also the heat accumulation in the bottom air cavity 103 can be avoided. As mentioned above, heat can also be transferred through the heat conduction effect. The heat generated by the hot air in the bottom air cavity 103 can be transferred to the inside of the cooking pot body 130. This part of heat also promotes the temperature balance inside the cooking pot body 130. At the same time, heat can also be transferred to the frame 120 through the surface of the cooking pot body 130 and the heat-insulating enclosure 140, and then transferred to the exhaust port 106 through the frame 120, which can also discharge excess heat from the air fryer and play an important role in reducing the surface temperature of the air fryer.

[0061] In this embodiment, the external frame 110, the rack 120, the cooking pot body 130 and the heat-insulating enclosure 140 are used to enclose the cavities required for the main structure 100, and the convection effect and the heat conduction effect are used to realize the hot air circulation with the above-mentioned functions. In addition, the excess heat of the bottom air cavity 103 can be dissipated through the convection effect and the heat conduction effect to avoid the surface temperature of the air fryer being too high.

[0062] In this embodiment, the external frame 110, the rack 120, the cooking pot 130 and the heat-insulating enclosure 140 are used to enclose the cavities required to be formed in the main structure 100, and the structures can be connected by connecting members such as screws. For example, the rack 120 is connected to the approximately center position of the external frame 110 to divide the internal space of the external frame 110 into a top air passage cavity 102 and a cooking cavity 101 arranged vertically; for another example, the heat-insulating enclosure 140 can be connected between the bottom of the external frame 110 and the rack 120 by connecting members such as screws. At this time, the heat-insulating enclosure 140 can independently isolate an actual cooking area in the cooking cavity 101 that conforms to the shape of the cooking pot 130, and hot air circulation circulates in the actual cooking area. At this time, after the cooking pot 130 is loaded into the actual cooking area, the hot air circulation can fry or roast the food in the cooking pot 130. The main structure 100 is composed of an external frame 110, a frame 120, a cooking pot body 130 and a heat-insulating enclosure 140. The various components are reliably connected, and it is relatively easy to construct the required cavities.

[0063] In addition, to facilitate the placement and removal of the cooking pot body 130, a drawer opening 111 is provided at a position of the external frame body 110 corresponding to the actual cooking area, and the cooking pot body 130 can be placed in or taken out of the actual cooking area through the drawer opening 111. When the cooking pot body 130 is placed in place, the structural design of the joints of the cooking pot body 130, the external frame body 110 and the heat-insulating enclosure 140, such as a butt or nested design, enables the three to be sealed and connected, so as to prevent hot air from leaking from the gap between the cooking pot body 130 and the external frame body 110 and affecting the cooking efficiency.

[0064] The outer frame 110 is used as the outer contour structure of the air fryer to protect other structural parts in the air fryer. In addition, in order to prevent the surface temperature of the air fryer from being too high during operation, the outer frame 110 is preferably made of a material with a heat-insulating effect.

[0065] In one embodiment, please refer to Figures 1 to 4 The external frame 110 includes a top cover 112 , a body 113 and a base assembly 114 , the top air inlet 104 is formed on the top cover 112 , the bottom air inlet 105 is formed on the base assembly 114 , and the exhaust port 106 is formed on the body 113 .

[0066] Here, the external frame 110 is designed to be composed of three parts. On the one hand, it is convenient for assembly and production. For example, the relevant structures can be installed on the base assembly 114 first, such as the aforementioned insulating enclosure 140 is assembled to the base assembly 114 by screws, and then the frame 120 is connected to the insulating enclosure 140, and then the fuselage 113 is covered, and finally the top cover 112 is assembled to realize the overall assembly of the air fryer, and operation panels, indicator lights and other structures can also be set on the top cover 112; on the other hand, the split design of the external frame 110 is also conducive to the maintenance of related structures in different areas. For example, when the control panel on the top cover 112 fails, the control panel can be removed or the top cover 112 can be removed as a whole for repair and replacement.

[0067] In addition, corresponding to the relevant description in the previous text, the "bottom of the external frame 110" described in the previous text is a base assembly 114, and the aforementioned heat-insulating enclosure 140 can be connected to the base assembly 114, and a bottom air inlet 105 is formed on the base assembly 114, and the outside air can enter the bottom air cavity 103 through the base assembly 114.

[0068] In a specific embodiment, please refer to Figures 1 to 4The base assembly 114 includes a bottom cover 1141, a bottom heat insulation plate 1142 arranged on the bottom cover 1141, and an inner bottom plate 1143 arranged on the bottom heat insulation plate 1142. The bottom heat insulation plate 1142 is sealed on the bottom cover 1141 to form a buffer cavity. The outside air can enter into the bottom air passage cavity 103 through the buffer cavity. The bottom hot air mechanism 300 mentioned above can be installed on the inner bottom plate 1143, and the aforementioned bottom air inlet 105 can be formed on the bottom cover 1141, the bottom heat insulation plate 1142 and the inner bottom plate 1143.

[0069] Specifically, the bottom heat insulation board 1142 is made of heat insulation material, which plays a role in heat insulation and heat preservation. The bottom heat insulation board 1142 can be assembled to the bottom cover 1141 alone, or assembled to the bottom cover 1141 by screws and other connecting parts passing through the threaded holes on the inner wall of the fuselage 113, the threaded holes on the bottom heat insulation board 1142 and the bottom cover 1141 in sequence. Similarly, the inner bottom plate 1143 can also adopt a similar assembly method, which can be directly assembled to the bottom heat insulation board 1142, or assembled to the bottom heat insulation board 1142 by screws and other connecting parts passing through the heat insulation enclosure 140, the inner bottom plate 1143 and the bottom heat insulation board 1142 in sequence. Of course, there are many options for assembling the bottom cover 1141, the bottom heat insulation board 1142 and the inner bottom plate 1143, which are not listed one by one in this article.

[0070] It should be noted here that, through the design of the buffer cavity formed by the bottom heat insulation plate 1142 and the inner bottom plate 1143, the outside air can more easily enter the bottom air cavity 103, and it is easier to stimulate the air convection effect.

[0071] As described above, the bottom air passage 103 is connected to the top air passage 102 via the air flow channel on the cooking pot body 130 and the convection holes 121 on the frame body 120. This situation is described in detail below.

[0072] Please refer to Figures 3 to 7 The convection hole 121 is formed on one side of the outer periphery of the frame 120, the cooking pot body 130 includes a pot body 131, a handle 132 and an insulating barrel wall 133 connected between the pot body 131 and the handle 132, and an air flow channel is formed in the insulating barrel wall 133. After the cooking pot body 130 is pushed into the cooking cavity 101, the air flow channel is connected to the convection hole 121.

[0073] When the cooking pot body 130 is in use, the handle 132 is generally held and pushed into the cooking cavity 101. At this time, the outer wall surface of the pot body 131, the inner surface of the insulating enclosure 140, the lower surface of the frame 120 and the bottom surface of the external frame 110 form a bottom air passage cavity 103. This space is generally designed to be sealed except for necessary openings (such as the aforementioned bottom air inlet 105). Therefore, in order to achieve the purpose of hot air in the bottom air passage cavity 103 flowing into the top air passage cavity 102, a better way is to set the insulating barrel wall 133 so that it has an air flow channel, and at the same time ensure that after the cooking pot body 130 is completely pushed into the cooking cavity 101, the air flow channel on the insulating barrel wall 133 can be connected with the convection flow hole 121 on the frame 120, thereby achieving the above purpose.

[0074] Of course, in other embodiments, the bottom air cavity 103 formed by the outer wall of the pot body 131, the inner surface of the heat-insulating enclosure 140, the lower surface of the frame 120 and the bottom surface of the external frame 110 may not be sealed, for example, convection holes 121 are also provided on other sides of the outer periphery of the frame 120 or a gap is left between the top of the pot body 131 and the frame 120, etc., in which case the hot air in the bottom air cavity 103 can also flow to the top air cavity 102. However, considering the stability of the work, the bottom air cavity 103 is generally designed to be sealed, and the following mainly uses this as an example for explanation.

[0075] In a specific embodiment, please refer to Figure 6 and Figure 7 A cavity is formed inside the heat-insulating barrel wall 133, a hot air inlet 1331 is provided on one side of the heat-insulating barrel wall 133 facing the cooking cavity 101, and a specific position of the hot air inlet 1331 may be the middle of the bottom of the heat-insulating barrel wall 133 facing the cooking cavity 101, a connecting port 1333 is provided on the top of the heat-insulating barrel wall 133, and the air flow channel includes a hot air channel formed by the hot air inlet 1331, the cavity and the connecting port 1333;

[0076] The insulated barrel wall 133 is also provided with a cold air inlet 1332 connected to the outside air. The cold air inlet 1332 can be opened at any position where the insulated barrel wall 133 is connected to the outside air, specifically, it can be the positions on both sides of the bottom of the insulated barrel wall 133, so that the position of the cold air inlet 1332 can be staggered with the position of the hot air inlet 1331, and can also be not on the same plane with the position of the hot air inlet 1331. The air flow channel also includes a cold air channel formed by the cold air inlet 1332, the cavity and the connecting port 1333.

[0077] In combination with the foregoing, within a period of time after the air fryer is started, the air inside the bottom air chamber 103 is heated to form hot air, and air convection is formed inside the bottom air chamber 103. At this time, the negative pressure inside the air fryer is relatively low, for example, generally 10-25Kpa. At this time, only hot air passes through the hot air channel and enters the top air chamber 102. After the operation is stable, when the negative pressure rises to greater than 25Kpa, the hot air and cold air in the bottom air chamber 103 will pass through the hot air channel and the cold air channel respectively and enter the top air chamber 102.

[0078] In a more specific embodiment, please refer to Figures 6 to 8 The insulating barrel wall 133 includes an inner wall 1334 and an outer wall 1335 that are interlocked, and the inner wall 1334 and the outer wall 1335 form a cavity. The hot air inlet 1331 and the cold air inlet 1332 are opened on the inner wall 1334. A wind shield 1336 located in the cavity is also provided on the inner wall 1334 and / or the outer wall 1335 to separate the cold air channel from the hot air channel.

[0079] It should be noted here that when the air fryer is started, the temperature inside it needs to be raised to a specified level at a relatively fast speed. During a period of time after the air fryer is just started, only the hot air in the bottom air chamber 103 can enter the top air chamber 102. At this time, with the help of the structural design of the wind shield 1336, the hot air can be relatively concentrated in the hot air channel, which can prevent the hot air from diffusing to the surroundings. This can increase the speed at which the hot air enters the top air chamber 102, which is of great significance for assisting the rapid increase in the overall temperature of the hot air circulation.

[0080] In some embodiments, in addition to the convection holes 121 on one side of the outer periphery of the frame 120, heat transfer holes 122 may also be formed on other sides of the outer periphery of the frame 120 to allow the heat in the bottom air cavity 103 to be transferred outward through the pot body 131, the insulating enclosure 140 and the frame 120.

[0081] The part of heat transferred outward can quickly dissipate the excess heat in the bottom air cavity 103 , which can effectively reduce the surface temperature of the air fryer. The part of heat can be dissipated through the exhaust port 106 .

[0082] As a preferred solution, the frame 120 is provided with convection holes 121 and heat transfer holes 122 at the same time. Based on this, the frame 120 can be designed in the following manner.

[0083] Please refer to Figure 4 and Figure 5The frame 120 includes a connecting ring 123 and a shell frame 124 arranged on the connecting ring 123, the shell frame 124 covers the connecting ring 123, the top hot air structure 200 is arranged on the shell frame 124, the connecting ring 123 includes a convection part 1231 and a double-ring structure part 1232, the convection flow hole 121 is formed on the convection part 1231, the double-ring structure part 1232 includes an inner ring 1232a, an outer ring 1232b and a plurality of connecting ribs 1232c connected between the inner ring 1232a and the outer ring 1232b, and the plurality of connecting ribs 1232c divide the space between the inner ring 1232a and the outer ring 1232b into a plurality of heat transfer holes 122.

[0084] The connecting ring 123 adopts a double-ring structure design, so that its structural strength is increased, which can effectively prevent the air fryer from breaking due to accidental falling.

[0085] In a specific embodiment, please refer to Figures 2 to 4 The frame 120 also includes a heat insulation cover 125 arranged below the shell frame 124. The top hot air structure 200 includes a motor 210, a hot fan 220 and a top heating pipe 230. The motor 210 is arranged on the shell frame 124. The hot fan 220 is connected to the output shaft of the motor 210. The hot fan 220 and the top heating pipe 230 are placed below the heat insulation cover 125. The heat insulation cover 125 is provided with a hot air outlet 1251 connected to the exhaust port 106.

[0086] The setting of the heat insulation cover 125 can make the hot air in the cooking cavity 101 be used frequently, and can effectively prevent the heat in the cooking cavity 101 from dissipating quickly. When a balance state is reached, the excess hot air can be discharged to the outside through the hot air outlet 1251 and the exhaust port 106.

[0087] In a more specific embodiment, please refer to Figure 3 and Figure 4 The air fryer further includes a cold air fan 400 , which is disposed between the housing frame 124 and the heat insulation cover 125 , and is used to form a cold air flow on a path passing through the motor 210 to cool the motor 210 .

[0088] In order to more clearly understand the workflow and advantages of controlling the fryer provided in the embodiments of this article, the following will be described in combination with the better ones of the embodiments listed above, and the following description will mainly be made from the flow direction of hot air and the direction of heat transfer.

[0089] May wish to refer to Figure 4When the air fryer is just started, the top hot air structure 200 starts to work, and negative pressure begins to be generated inside the air fryer and the negative pressure is at a relatively low level. At this time, the outside air enters the top air cavity 102 and the bottom air cavity 103 through the top air inlet 104 and the bottom air inlet 105 respectively, and starts to generate hot air respectively. The air entering from the top air inlet 104 flows along the convection path S1. At the same time, the hot air in the bottom air cavity 103 enters the top air cavity 102 along the convection path S2 and is used. At this time, the air used by the top hot air structure 200 is mixed with hot air, so that the overall temperature of the hot air cycle can rise rapidly. After a certain period of time, the air fryer reaches a balanced state, and the cold air in the bottom air chamber 103 will also enter the top air chamber 102. At this time, the hot air in the cooking chamber 101 flows along the convection path S3 (other convection paths operate as usual), flowing back and forth so that it can be fully diffused into the cooking pot body. At the same time, the excess hot air will be discharged from the exhaust port 106 along the convection path S4. At this time, S1, S2, S3, and S4 form a hot air circulation, which ultimately realizes the rapid start-up of the air fryer, improves cooking efficiency, and improves the frying and roasting effect of food. The hot air in the bottom air chamber 103 can also be transferred to the top air chamber 102 to reduce the surface temperature of the fryer. In the above process, part of the heat will be transferred through the heat conduction effect. The heat in the bottom air cavity 103 will be transferred to the inside of the cooking pot body 130 through the conduction path W1, making the temperature inside the cooking pot body 130 more balanced, promoting further improvement of cooking efficiency and frying and roasting effects. At the same time, excess heat will be discharged to the outside along the conduction path W2 and through the exhaust port 106 to reduce the surface temperature of the air fryer.

[0090] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0091] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An air fryer, characterized in that: include: The main structure is formed with a cooking cavity, a top air cavity communicating with the cooking cavity, a bottom air cavity communicating with the top air cavity, a top air inlet communicating with the top air cavity, and a bottom air inlet communicating with the bottom air cavity, and the main structure is further formed with an exhaust port, and in the cooking cavity and the top air cavity, the exhaust port is at least connected to the cooking cavity; A top hot air structure, located in the cooking cavity and / or the top air passage cavity, for forming hot air in the top air passage cavity and transmitting the hot air to the cooking cavity; And a bottom hot air structure is located in the bottom air passage cavity and is used to form hot air in the bottom air passage cavity and transmit the hot air to the top air passage cavity.

2. The air fryer according to claim 1, characterized in that: The main structure includes a skeleton structure with a pull-out opening and a cooking pot body that can be loaded into the skeleton structure through the pull-out opening. The bottom air cavity is formed by the space surrounded by the cooking pot body and the skeleton structure. The air in the bottom air cavity can enter the top air cavity through the cooking pot body.

3. The air fryer according to claim 2, characterized in that: The skeleton structure comprises an external frame and a rack, wherein the rack is arranged in the external frame to separate the external frame into the cooking cavity and the top air passage cavity which are interconnected.

4. The air fryer according to claim 3, characterized in that: The outer periphery of the frame is provided with convection holes, the cooking pot body is formed with an air flow channel connected with the convection holes, and the bottom air cavity is connected to the top air cavity through the convection holes and the air flow channel.

5. The air fryer according to claim 4, characterized in that: The cooking pot body comprises a pot body and a heat-insulating barrel wall connected to the pot body, and the airflow channel is formed in the heat-insulating barrel wall.

6. The air fryer according to claim 5, characterized in that: A cavity is formed inside the insulating barrel wall, a hot air inlet is provided on the side of the insulating barrel wall facing the cooking cavity, a connecting port is provided on the top of the insulating barrel wall, and the air flow channel includes a hot air channel formed by the hot air inlet, the cavity and the connecting port.

7. The air fryer according to claim 6, characterized in that: The heat-insulating barrel wall is also provided with a cold air inlet, and the air flow channel also includes a cold air channel formed by the cold air inlet, the cavity and the connecting port.

8. The air fryer according to claim 7, characterized in that: The hot air inlet is arranged in the middle of the bottom of the heat-insulating barrel wall, and the cold air inlet is arranged on both sides of the bottom of the heat-insulating barrel wall.

9. The air fryer according to claim 8, characterized in that: The insulating barrel wall includes an inner wall and an outer wall that are interlocked, and the inner wall and the outer wall form the cavity. The hot air inlet and the cold air inlet are opened on the inner wall. A wind shield located in the cavity is also arranged on the inner wall and / or the outer wall, and the wind shield is used to separate the cold air channel from the hot air channel.

10. The air fryer according to claim 3, characterized in that: The external frame includes a base assembly, and the base assembly includes a bottom cover and a bottom insulation board arranged on the bottom cover. The bottom insulation board is sealed on the bottom cover to form a buffer cavity, and external air can enter the bottom air cavity through the buffer cavity.

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