Heat dissipation device for air fryer and air fryer

Abstract

The present disclosure provides a heat dissipation device for an air fryer and an air fryer. The heat dissipation device is arranged in a cover assembly of the air fryer and comprises a heat insulation bracket (103) for mounting and fixing a motor assembly (105), and a flow guide plate (104) provided with an air inlet (1042) which is in butt joint with an air inlet (1072) of a shell (107) of the cover assembly, wherein the flow guide plate (104) and the heat insulation bracket (103) form at least a first air duct (410) when they are assembled, the first air duct (410) at least partially extends along a peripheral portion close to the cover assembly to form an annular shape, so that air enters the inside of the cover assembly from the air inlet (1072) of the shell (107), flows along at least the first air duct (410) to cool the peripheral portion of the air fryer, and is discharged through an air outlet (109) of the cover assembly after completing the cooling of the air fryer.

Description

Technical Field

[0001] This disclosure relates to the field of kitchen appliances, and more specifically, to a heat dissipation device for an air fryer and an air fryer. Background Technology

[0002] A key challenge in the design of electric heating kitchen appliances is effectively controlling overall temperature rise to meet stringent electrical safety regulations. Excessive surface and component temperatures not only negatively impact user experience and product performance and reliability but can also pose safety hazards. Air fryers, as typical electric heating kitchen appliances, integrate multiple heating elements such as heating tubes and motors, making heat dissipation a particularly critical issue. Therefore, developing a well-structured and highly efficient cooling system is essential for improving the reliability and safety of these products.

[0003] However, most electric kitchen appliances on the market still suffer from insufficient heat dissipation efficiency. Especially in space-constrained product designs, poorly designed heat dissipation paths can easily lead to airflow dead zones, causing localized overheating. Specifically, the cooling airflow path design of most products is flawed: the cold air inlet and outlet are usually located at the bottom and top, causing cold air to flow directly to the outlet after entering, failing to adequately flow through the high-temperature areas that require the most heat dissipation (such as the area around the heating element, the main control board, and other critical components), creating an "airflow short circuit" phenomenon that severely reduces heat dissipation efficiency.

[0004] To address this challenge, some improved designs exist in existing technologies. For example, Chinese patent CN222091456U improves air intake efficiency through a cooling fan, thus enhancing heat dissipation to some extent. However, this solution still has the following shortcomings: after entering the heat dissipation chamber, the cold air mainly flows directly to the outlet through the air guide shroud, failing to form a systematic zoned heat dissipation airflow. This results in some high-temperature areas (such as the metal outer shell around the cooking cavity and some electrical components) not being adequately cooled, leading to poor performance in achieving balanced heat dissipation between the outer metal components and the internal electrical components.

[0005] Therefore, there is still room for improvement in existing heat dissipation solutions. There is an urgent need for a design that can achieve zoned heat dissipation and construct an orderly cooling airflow to improve the heat dissipation performance and safety reliability of electric heating kitchen appliances. Utility Model Content

[0006] This disclosure is provided to introduce, in a simplified form, some concepts that will be further described in the following detailed description. This disclosure is not intended to identify key or essential features of the claimed subject matter, nor is it intended to help determine the scope of the claimed subject matter.

[0007] In view of the deficiencies in the prior art described above, one of the objectives of this disclosure is to provide a zoned collaborative heat dissipation air duct system or device for air fryers. This zoned collaborative heat dissipation air duct system or device, through a ring-shaped air duct design combined with an integrated plastic motor bracket and a flow-guiding reinforcement structure, allows cooling air to flow to as many hot areas as possible for heat dissipation, thereby achieving efficient collaborative heat dissipation of the surface temperature of the lid assembly and the internal components.

[0008] According to one aspect of this disclosure, a heat dissipation device for an air fryer is provided, the heat dissipation device being disposed in a lid assembly of the air fryer, and the heat dissipation device comprising: a heat insulation bracket for mounting and fixing a motor assembly; and a baffle plate having an air inlet that connects to an air inlet on the outer shell of the lid assembly, wherein when the baffle plate and the heat insulation bracket are assembled, the baffle plate and the heat insulation bracket at least form a first air duct, the first air duct extending at least partially along a portion near the outer periphery of the lid assembly to form an annular shape, such that air enters the interior of the lid assembly from the air inlet of the outer shell, flows at least along the first air duct to cool the outer periphery of the air fryer, and is discharged through an air outlet of the lid assembly after cooling of the air fryer is complete.

[0009] According to a further embodiment of this disclosure, the main body of the heat-insulating bracket is provided with a raised second annular wall. The second annular wall partially surrounds the motor assembly to form a second air duct. When the guide plate and the heat-insulating bracket are assembled, air from the air inlet passes through the first air duct and then flows into the second air duct through the opening in the second annular wall to cool the motor assembly. This design, by forming a second air duct through the second annular wall, constitutes a motor heat dissipation area for the air fryer, allowing air to enter the second air duct after cooling the outer periphery of the air fryer to cool the motor.

[0010] According to a further embodiment of this disclosure, a heat-insulating bracket is disposed above the heat-insulating cover of the lid assembly to form a third air duct with the heat-insulating cover. One or more vents are provided in the area of ​​the bracket body within the second air duct, so that when the guide plate and heat-insulating bracket are assembled, air passes through the second air duct, sinks into the third air duct through the one or more vents, and is then discharged through the air outlet of the lid assembly. This design, by forming a third air duct through the heat-insulating bracket and heat-insulating cover, constitutes the heat exhaust zone of the air fryer, allowing air to enter the third air duct and be discharged after cooling the motor.

[0011] According to a further embodiment of this disclosure, a motor assembly is used to drive a lower fan to rotate, thereby guiding hot air from the second air duct downwards into the third air duct via centrifugal force, and then flowing laterally to the outlet for discharge. This design uses a motor to drive a fan, utilizing the centrifugal force generated by the rotation to accelerate the discharge of hot air from the motor.

[0012] According to a further embodiment of this disclosure, the first air duct is located diagonally opposite the air outlet. This design facilitates the flow of cold air through the first, second, and third air ducts over a larger area within the lid assembly for heat dissipation before being exhausted.

[0013] According to a further embodiment of this disclosure, the main body of the heat insulation bracket is provided with a raised first annular wall, and when the guide plate and the heat insulation bracket are assembled, the guide plate, the outer edge of the heat insulation bracket, and the first annular wall cooperate to form a first air duct. This design forms the first air duct through the cooperation of components between the heat insulation bracket and the guide plate, and is compact and easy to manufacture.

[0014] According to a further embodiment of this disclosure, the outlet of the first air duct is aligned with the opening of the second annular wall, and the opening of the second annular wall is located at the coil of the motor assembly. This design allows the outlet of the first air duct to be aligned with the coil of the motor assembly, so that the cool air flowing out of the first air duct can flow smoothly into the second air duct without obstruction, and dissipates heat from the coil of the high-power motor assembly as soon as it enters the second air duct.

[0015] According to another aspect of this disclosure, an air fryer is provided, comprising a cooking chamber for cooking food and a lid assembly, wherein the lid assembly includes: a heating element disposed above the cooking chamber; a fan disposed above the heating element; a motor assembly disposed above the fan to drive the fan to rotate, thereby causing the air heated by the heating element to circulate within the cooking chamber to heat the food; and a heat dissipation device according to this disclosure, disposed above the heating element. This design employs the heat dissipation device of this disclosure, which guides cooling air into the air fryer through an air duct, first cooling the surface of the air fryer, then cooling the internal motor assembly, and then dissipating the air.

[0016] According to a further embodiment of this disclosure, the fan includes: a first blade group disposed above the heat insulation bracket to guide airflow within the lid assembly in conjunction with a heat dissipation device, thereby dissipating heat from the air fryer; and a second blade group disposed between the heat insulation bracket and the heating device to circulate the air heated by the heating device within the cooking chamber to heat the food. This dual-layer fan structure ensures efficient circulation of hot air within the cooking chamber for cooking, while also achieving active cooling of the lid assembly.

[0017] According to a further embodiment of this disclosure, a metal decorative element is provided on the outer shell of the pot lid assembly, and the metal decorative element is located on the outer periphery near the first air duct. This design allows heat dissipation from the metal decorative element on the outer shell of the pot lid assembly as air flows through the first air duct.

[0018] These and other features and advantages will become apparent from the following detailed description and with reference to the accompanying drawings. It should be understood that the foregoing general description and the following detailed description are illustrative only and do not limit the scope of the claims. Attached Figure Description

[0019] To gain a more detailed understanding of the manner in which the features of this disclosure are described above, reference can be made to the various embodiments for a more specific description of the above-briefly summarized aspects, some of which are illustrated in the accompanying drawings. However, it should be noted that the drawings illustrate only certain typical aspects of this disclosure and should not be considered as limiting its scope, as this description may allow for other equivalent and effective aspects.

[0020] Figure 1 An exploded view of the lid assembly of an air fryer according to an embodiment of the present disclosure is provided.

[0021] Figure 2a and Figure 2b A disassembly diagram of a heat dissipation device for an air fryer according to an embodiment of the present disclosure is provided.

[0022] Figure 3 A schematic diagram illustrating the combination of a heat dissipation device for an air fryer according to an embodiment of the present disclosure is provided.

[0023] Figure 4 A top view of the lid assembly of an air fryer according to an embodiment of the present disclosure is described.

[0024] Figure 5 and Figure 6 A side view of the lid assembly of an air fryer according to an embodiment of the present disclosure is described.

[0025] Explanation of reference numerals in the attached figures:

[0026] 101 Heating device; 102 Heat insulation cover; 103 Heat insulation bracket; 104 Deflector plate; 105 Motor assembly; 106 Fan; 107 Housing; 108 Metal decorative parts; 109 Air outlet.

[0027] 1030 Support body; 1032 First annular wall; 1034 Second annular wall; 1036 Opening.

[0028] 1042 Air inlet; 1072 Air inlet.

[0029] 1010 Outer edge; 410 First air duct; 320 Coil.

[0030] 310 Second air duct; 1038 Vent hole; 510 Third air duct.

[0031] 1062 First blade group; 1064 Second blade group. Detailed Implementation

[0032] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0033] In the description of this disclosure, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," etc., indicating orientation or positional relationships are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. "Vertical" is not vertical in the strict sense, but within the allowable tolerance range. "Parallel" is not parallel in the strict sense, but within the allowable tolerance range.

[0034] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this disclosure. It should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0035] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this disclosure. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0036] In the description of the embodiments of this disclosure, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0037] The following text will combine Figures 1 to 6 To describe the principles of this disclosure.

[0038] Figure 1 An exploded view of the lid assembly of an air fryer according to an embodiment of the present disclosure is shown. It should be noted that... Figure 1 The pot lid assembly shown is illustrative only and not limiting. The pot lid assembly disclosed herein may include, but is not limited to, other types of lid assemblies. Figure 1 The pot lid assembly shown may have more or fewer components.

[0039] Additionally, it can be understood that the air fryer may also include a cooking chamber (not shown) for cooking ingredients, with a lid assembly positioned above the cooking chamber.

[0040] like Figure 1 As shown, the lid assembly may include a heating element 101, a fan 106, and a motor assembly 105. From top to bottom, these are the motor assembly 105, the fan 106, and the heating element 101. The heating element 101 is positioned above the cooking chamber of the air fryer and can heat the food within the cooking chamber, for example. In a non-limiting example, the air fryer (or other similar cooking appliance or kitchen appliance-related equipment) may also include other heating elements, with the heating element 101 serving as the primary heat source. The motor assembly 105 is positioned above the fan 106 to drive the fan 106 to rotate, thereby causing the air heated by the heating element 101 to circulate within the cooking chamber to heat the food.

[0041] Furthermore, the lid assembly may also include a heat dissipation device. This heat dissipation device is positioned above the heating element 101 to guide airflow within the lid assembly, thereby dissipating heat from the air fryer. The heat dissipation device can guide the cold air entering the lid assembly through as many areas as possible before expelling it, thus carrying away heat from the air fryer.

[0042] The following is a detailed explanation of the heat dissipation device. Figure 2a and Figure 2b A disassembly diagram of a heat dissipation device for an air fryer according to an embodiment of the present disclosure is shown. Figure 3 A schematic diagram of a heat dissipation device for an air fryer according to an embodiment of the present disclosure is shown. Figure 4A top view of the lid assembly of an air fryer according to an embodiment of the present disclosure is shown. Figure 5 and Figure 6 A side view of the lid assembly of an air fryer according to an embodiment of the present disclosure is shown. In contrast to... Figure 5 , Figure 6 The pot lid assembly shown has an added outer shell 107.

[0043] like Figure 1 , Figure 5 and Figure 6 As shown, the heat dissipation device is located in the lid assembly of the air fryer. Figure 1 As shown, the heat dissipation device may include a heat insulation bracket 103 and a baffle plate 104. The heat insulation bracket 103 is used to mount and secure the motor assembly 105. The baffle plate 104 is provided with an air inlet 1042, which can connect with the air inlet 1072 of the outer shell 107 of the lid assembly, so that air from outside the air fryer flows into the lid assembly of the air fryer through the air inlet 1072 and the air inlet 1042. In a non-limiting example, the air inlet 1072 may include multiple air intake holes to increase the inflow of cold air.

[0044] like Figure 3 As shown, when the air guide plate 104 and the heat insulation bracket 103 are assembled, the air guide plate 104 and the heat insulation bracket 103 can form at least a first air duct 410. The first air duct 410 extends at least partially along the outer periphery of the lid assembly to form a ring, so that air enters the interior of the lid assembly from the air inlet 1072 of the outer shell 107, flows at least along the first air duct 410 to cool the outer periphery of the air fryer, and is discharged through the air outlet 109 of the lid assembly after cooling the air fryer is complete. It can be seen that the air entering the air fryer can flow around the lid assembly along the first air duct 410, covering as much area as possible of the heat insulation bracket 103 for effective heat dissipation. In other words, the ring-shaped air duct design allows the cooling air to flow to as many hot areas as possible for heat dissipation.

[0045] In one example, such as Figure 2a and Figure 3As shown, the support body 1030 of the heat insulation bracket 103 may be further provided with a raised second annular wall 1034, which partially surrounds the motor assembly 105 to form a second air duct 310. In a non-limiting example, the heat insulation bracket 103 is made of insulating material. Additionally, the second annular wall 1034 has a height-gradient design with an opening 1036, allowing air to flow into the second air duct 310. Specifically, when the guide plate 104 is assembled with the heat insulation bracket 103, this design allows air from the air inlet 1072 to pass through the first air duct 410 and then flow into the second air duct 310 through the opening 1036 of the second annular wall 1034 to cool the motor assembly 105. Thus, this example can guide the cold air entering the lid assembly to first flow through the first air duct 410 to dissipate heat from the outer surface of the lid assembly, and then enter the second air duct 310 to dissipate heat from the motor assembly 105.

[0046] In further examples, such as Figure 2a and Figure 3 As shown, the outlet of the first air duct 410 is connected to the opening 1036 of the second annular wall 1034, and the opening 1036 of the second annular wall 1034 is located at the coil 320 of the motor assembly 105. Considering that the coil 320 of the motor assembly 105 has a large amount of heat, this design allows the air flowing into the second air duct to first dissipate heat from the coil 320.

[0047] In one example, such as Figure 1 As shown, the pot lid assembly may further include a heat insulation cover 102, that is, a heat insulation cover 102 of the pot lid assembly is disposed below the heat insulation bracket 103. Specifically, the heating device 101 can be installed below the heat insulation cover 102, while the heat insulation bracket 103 is installed above the heat insulation cover 102. Figure 2a As shown, the support body 1030 of the heat insulation bracket 103 has one or more ventilation holes 1038 in the area within the second air duct 310. Accordingly, refer to... Figure 5 and Figure 6 The heat insulation bracket 103 and the heat insulation cover 102 form a third air duct 510. When the guide plate 104 and the heat insulation bracket 103 are assembled, this design allows air to pass through the second air duct 310, sink into the third air duct 510 through one or more vents 1038, and then be discharged through the air outlet 109 of the pot lid assembly, forming a hot air exhaust duct.

[0048] As can be seen, this example can guide the cold air entering the lid assembly to first flow through the first air duct 410 to dissipate heat on the outer surface of the lid assembly, then enter the second air duct 310 to dissipate heat on the motor assembly 105, and finally sink down and be discharged through the third air duct 510, thereby taking away the heat inside the lid assembly.

[0049] In further examples, such as Figure 1 , Figure 5 and Figure 6 As shown, the fan 106 and motor assembly 105 can be mounted on the heat insulation bracket 103 (also known as the motor heat insulation bracket) to create airflow for overall heat dissipation. For example, the motor assembly 105 drives the fan 106 below to rotate, and the rotation of the fan 106 generates centrifugal force. This centrifugal force can accelerate and guide the hot air from the second air duct 310 to sink into the third air duct 510, and then flow laterally to the air outlet 109 for discharge. Therefore, this design can utilize the fan to further increase the exhaust rate of the air after heat absorption, thereby optimizing the heat dissipation effect.

[0050] It can be understood that the second air duct 310 and the third air duct 510 are further improvements based on the first air duct 410. In actual design, only the first air duct 410, the first air duct 410 and the second air duct 310, or the first air duct 410, the second air duct 310 and the third air duct 510 can be designed as needed.

[0051] The following are examples of the first air duct 410.

[0052] In one example, such as Figure 4 As shown, the first air duct 410 can be located diagonally opposite the air outlet 109. This design allows the first air duct 410 to be located away from the air outlet 109. Since air enters the lid assembly from the air inlet 1072, it needs to pass through the first air duct 410, or further through the second air duct 310, or even through the third air duct 510, and finally be discharged through the air outlet 109. The first air duct 410 is used to dissipate heat from the surface of the air fryer (or lid assembly). Therefore, the first air duct 410 in this design allows the air path to cover as much of the surface area of ​​the lid assembly as possible, thereby achieving more extensive heat dissipation.

[0053] In one example, such as Figure 3 As shown, a raised first annular wall 1032 may be provided on the support body 1030 of the heat insulation bracket 103. When the guide plate 104 is assembled with the heat insulation bracket 103, the guide plate 104 can cooperate with the outer edge 1010 of the heat insulation bracket 103 and the first annular wall 1032 to form a first air duct 410. This design adds a first annular wall 1032 to the support body 1030 to isolate the first air duct 410. Such an annular channel can guide the flow of air entering the pot lid assembly, so that it flows in a direction through the area to be dissipated, that is, the originally disordered and inefficient natural airflow is transformed into an ordered, efficient and controllable forced airflow, thereby obtaining the maximum heat dissipation benefit.

[0054] Furthermore, the combination of the baffle 104 and the heat insulation bracket 103 can isolate a narrower and lower air duct to accelerate the airflow and thus remove heat more quickly. Accordingly, it can be understood that in practical applications (such as when heat dissipation requirements are not high), the baffle 104 can be omitted, so that the first annular wall 1032 of the heat insulation bracket 103 directly forms the first air duct 410 with the outer shell 107 of the pot lid assembly.

[0055] In one example, the heat insulation bracket 103 and the air deflector 104 can be integrally formed. In other words, the heat insulation bracket 103 can have the air deflector 104 integrated, making the heat insulation bracket 103 and the air deflector 104 a single accessory. This design can improve the sealing and reliability of the first air duct 410, and the smooth, seamless inner wall can significantly reduce airflow resistance, further increasing its flow rate.

[0056] In another example, the deflector 104 can be detachably secured to the top of the heat insulation bracket 103 via clips and / or screws. For example, Figure 1 and Figure 2b The design of the snap-on air deflector 104 is presented. This design uses a detachable connection method, which disassembles and simplifies the style of the components, making them easier to manufacture. In addition, since both are detachable, it is also easier to clean them or replace a component.

[0057] Furthermore, it can be understood that if an air duct is formed by the detachable combination of the heat insulation bracket 103 and the air guide plate 104, the specific shapes of the heat insulation bracket 103 and the air guide plate 104 are not limited. For example, they can be as follows: Figure 2a and Figure 2b As shown, the heat insulation bracket 103 is provided with a raised first annular wall 1032. Alternatively, a similar annular wall can be formed by the guide plate 104. Correspondingly, the heat insulation bracket 103 does not have a first annular wall 1032, but when the guide plate 104 and the heat insulation bracket 103 are assembled, a first air duct 410 can still be formed. Similarly, other shapes are also feasible, as long as the guide plate 104 and the heat insulation bracket 103 can cooperate to form a first air duct 410 (i.e., an annular air duct or a side annular air duct).

[0058] As can be seen, the heat dissipation device disclosed herein has one or more air ducts in the heat dissipation area. By guiding air to flow directionally through the heat-generating area, the cooling air entering the lid assembly first cools the surface of the top cover of the machine rather than the inside of the machine, thereby removing heat with maximum efficiency. Conversely, without air ducts, the cool air entering the lid assembly may circulate randomly inside the equipment or even form eddies, resulting in a significant reduction in heat dissipation effect.

[0059] For the pot lid assembly equipped with this heat dissipation device, please refer to the previous section. Figure 1 In one example, such as Figure 1 and Figure 3 As shown, a metal decorative element 108 (or metal decorative strip) may be provided on the outer shell 107 of the pot lid assembly. Accordingly, the metal decorative element 108 may be provided on the outer peripheral portion near the first air duct 410. This design allows the first air duct 410 to also dissipate heat from the metal decorative element 108 on the outer shell 107.

[0060] During cooking, the cooking chamber and heating element 101 inside the air fryer become extremely hot, and this heat is transferred to the connected outer shell through contact or radiation. The outer shell is typically made of plastic, but plastic has a limited heat resistance. If the local temperature exceeds its tolerance limit for an extended period, the plastic will soften, deform, or even melt, leading to product damage and potentially causing a fire hazard. The metal decorative element 108, while aesthetically pleasing, also helps to quickly conduct heat accumulated on the plastic outer shell and dissipate it into the air, thus extending the overall lifespan of the product. However, the metal decorative element 108 absorbs heat and generally generates a significant amount of heat itself. Furthermore, accidental contact with the metal decorative element 108 can easily cause burns. Therefore, placing the first air duct 410 near it allows for more targeted heat dissipation of the lid assembly.

[0061] In another example, for a lid assembly equipped with this heat dissipation device, such as Figure 5 and Figure 6 As shown, the fan 106 may include a first blade group 1062 and a second blade group 1064. The first blade group 1062 is positioned above the heat insulation bracket 103 and, in conjunction with the heat dissipation device, guides airflow within the lid assembly to dissipate heat from the air fryer. The second blade group 1064 is positioned between the heat insulation bracket 103 and the heating element 101 to circulate the air heated by the heating element 101 within the cooking chamber to heat the food. This design, through the cooperation of the first blade group 1062 and the heat dissipation device, accelerates airflow and improves heat dissipation efficiency without affecting the heating of the food by the second blade group 1064. This resolves the inherent contradiction between efficient heating and ensuring safe low temperatures, resulting in significant improvements in safety, user experience, product performance, and reliability.

[0062] The above describes the heat dissipation device of this disclosure, the lid assembly equipped with the heat dissipation device, and the product structure of the air fryer including the lid assembly. Specifically, the lid assembly of this disclosure has a heat insulation bracket 103 and a baffle plate 104 (the two are integrated or the baffle plate 104 is detachably mounted on the heat insulation bracket 103). In addition, a motor assembly 105 and a fan 106 are arranged in the middle of the heat insulation bracket 103 to absorb cold air from the air inlet 1072, guide it to flow along the air duct inside the lid assembly, absorb heat, and then discharge it from the air outlet 109.

[0063] It is clear that, depending on the actual situation, the above examples can be implemented individually or in combination.

[0064] The following will combine Figures 4 to 6 The airflow direction within the pot lid assembly in the case of three air ducts (i.e., the first air duct 410, the second air duct 310, and the third air duct 510) will be further explained. For ease of explanation, a non-limiting specific embodiment is given below.

[0065] When the motor assembly 105 and fan 106 are turned on with the machine (such as an air fryer), a negative pressure is created inside the machine's cavity, causing cold air to enter the cavity through the air inlet 1072 on the outer shell 107 of the lid assembly. Once inside the cavity, the cold air flows along the annular heat dissipation duct (i.e., the first air duct 410) formed by the guide plate 104 and the heat insulation bracket 103, maximizing heat dissipation for the outer shell 107 and the metal decorative parts 108 on it. This area can be referred to as the surface cooling zone.

[0066] After the cold air passes through the annular air duct (i.e., the first air duct 410), it enters the motor area (i.e., the second air duct 310) through the opening 1036 of the second annular wall 1034 of the heat insulation bracket 103, where it dissipates heat from the motor assembly 105. This area can be referred to as the motor heat dissipation area.

[0067] After the airflow passes through the motor cooling area (or the second air duct 310), due to the centrifugal cooling blades of the fan 106 (such as the first blade group 1062 in the fan 106), the waste heat airflow, which helps to dissipate heat, sinks into the third air duct 510 and is discharged from the machine horizontally towards the air outlet 109. This area can be called the heat recovery area and the heat discharge area.

[0068] The above process forms a complete zoned and coordinated heat dissipation airflow structure system. The zoned heat dissipation design is achieved through multiple airflow channels, creating airflow within and between each channel. This reduces dead zones and allows cool air to reach as much as possible through each area requiring cooling, including the exterior metal parts and the electrical components within the lid assembly.

[0069] Additionally, it should be noted that, for ease of description, all accompanying drawings in this disclosure use an air fryer as an example. However, it will be understood that the structure and improvements of this disclosure (such as the heat dissipation device of this disclosure, and / or the lid assembly equipped with the heat dissipation device) are not only applicable to air fryers, but can also be applied to other similar electrically heated kitchen appliances, such as electric ovens, electric grills, food processors, etc.

[0070] The foregoing description includes examples of various aspects of the claimed subject matter. It is certainly impossible to describe every conceivable combination of components or methods for the purpose of depicting the claimed subject matter, but those skilled in the art will recognize that many further combinations and arrangements of the claimed subject matter are possible. Thus, the disclosed subject matter is intended to cover all such changes, modifications, and variations that fall within the spirit and scope of the appended claims.

Claims

1. A heat dissipation device for an air fryer, characterized in that, The heat dissipation device is disposed in the lid assembly of the air fryer, and the heat dissipation device includes: Thermal insulation bracket (103), said thermal insulation bracket (103) is used to install and secure the motor assembly (105); and A baffle plate (104) is provided with an air inlet (1042), which is connected to the air inlet (1072) of the outer shell (107) of the pot lid assembly. When the air guide plate (104) and the heat insulation bracket (103) are assembled, the air guide plate (104) and the heat insulation bracket (103) form at least a first air duct (410). The first air duct (410) extends at least partially along the outer periphery of the lid assembly to form an annular shape, so that air enters the interior of the lid assembly from the air inlet (1072) of the outer shell (107), flows at least along the first air duct (410) to cool the outer periphery of the air fryer, and after cooling the air fryer, it is discharged through the air outlet (109) of the lid assembly.

2. The heat dissipation device as described in claim 1, characterized in that, The heat insulation bracket (103) has a raised second annular wall (1034) on its main body (1030). The second annular wall (1034) partially surrounds the motor assembly (105) to form a second air duct (310). When the guide plate (104) is assembled with the heat insulation bracket (103), air from the air inlet (1072) passes through the first air duct (410) and then flows into the second air duct (310) through the opening (1036) of the second annular wall (1034) to cool the motor assembly (105).

3. The heat dissipation device as described in claim 2, characterized in that, The heat insulation bracket (103) is disposed above the heat insulation cover (102) of the pot lid assembly to form a third air duct (510) with the heat insulation cover (102). The bracket body (1030) is provided with one or more vent holes (1038) in the area within the second air duct (310) so that when the guide plate (104) and the heat insulation bracket (103) are assembled, air passes through the second air duct (310), sinks into the third air duct (510) through the one or more vent holes (1038), and is then discharged through the air outlet (109) of the pot lid assembly.

4. The heat dissipation device as described in claim 3, characterized in that, The motor assembly (105) is used to drive the fan (106) below to rotate, so as to guide the hot air in the second air duct (310) to sink into the third air duct (510) by centrifugal force, and flow laterally to the air outlet (109) for discharge.

5. The heat dissipation device as described in claim 4, characterized in that, The first air duct (410) is located diagonally opposite the air outlet (109).

6. The heat dissipation device as described in claim 1, characterized in that, The heat insulation bracket (103) has a raised first annular wall (1032) on its bracket body (1030), and when the guide plate (104) is assembled with the heat insulation bracket (103), the guide plate (104) and the outer edge (1010) of the heat insulation bracket (103) and the first annular wall (1032) cooperate to form the first air duct (410).

7. The heat dissipation device as described in claim 2, characterized in that, The outlet of the first air duct (410) is connected to the opening (1036) of the second annular wall (1034), and the opening (1036) of the second annular wall (1034) is located at the coil (320) of the motor assembly (105).

8. An air fryer, characterized in that, The air fryer includes a cooking chamber for cooking food and a lid assembly, wherein the lid assembly includes: A heating device (101) is disposed above the cooking chamber; A fan (106) is disposed above the heating device (101); A motor assembly (105), disposed above the fan (106), drives the fan (106) to rotate, thereby causing air heated by the heating device (101) to circulate within the cooking chamber to heat the food; and The heat dissipation device as described in any one of claims 1-7 is disposed above the heating device (101).

9. The air fryer as described in claim 8, characterized in that, The fan (106) includes: The first blade assembly (1062) is disposed above the heat insulation bracket (103) to cooperate with the heat dissipation device in guiding the airflow within the lid assembly, thereby dissipating heat from the air fryer; and The second blade group (1064) is disposed between the heat insulation bracket (103) and the heating device (101) to cause the air heated by the heating device (101) to circulate in the cooking chamber to heat the food.

10. The air fryer as described in claim 9, characterized in that, The outer shell (107) of the pot lid assembly is provided with a metal decorative piece (108), and the metal decorative piece (108) is provided on the outer peripheral portion near the first air duct (410).

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