Air fryer capable of optimizing heat dissipation

Abstract

The air fryer is characterized in that a hot air fan is arranged in a cooking cavity, a volute and a motor which are transversely arranged are arranged in a mounting cavity, a cooling fan is arranged in the volute, the motor drives the hot air fan and the cooling fan to rotate at the same time, the motor has a first rotating direction and a second rotating direction, and the volute is provided with an annular side wall extending longitudinally; an opening is formed between the two ends of the annular side wall, an air distribution plate which extends towards the cooling fan and is longitudinally arranged is arranged at the opening, the air distribution plate and the volute are integrally arranged, and the opening is divided into a first opening and a second opening by the air distribution plate; the distance between the end, facing the cooling fan, of the air distribution plate and the cooling fan is smaller than the distance between the two ends of the annular side wall and the cooling fan, so that a first volute tongue and a second volute tongue are formed on the two sides, facing the end of the cooling fan, of the air distribution plate correspondingly. When the motor rotates in the second direction, the second opening is used for discharging air. According to the invention, the heat dissipation problem of the motor in different rotation directions can be solved.

Description

Technical Field

[0001] The utility model relates to the field of kitchen appliances, in particular to an air fryer with optimized heat dissipation. Background Art

[0002] Existing air fryers rely on a fan to drive a stream of hot air inside the cooking chamber to air-fry the ingredients. A motor driving the fan is located outside the cooking chamber. During operation, the area near the motor becomes hotter, so a coaxial cooling fan is typically installed to dissipate heat and maintain the air fryer's performance and lifespan. To improve the fan's cooling efficiency, a volute is typically installed around the fan, with a tongue at the air outlet. Because the air pressure at the tongue is higher, airflow is preferentially discharged through the outlet, effectively preventing backflow and enhancing the fan's cooling efficiency.

[0003] However, in the air fryer of the prior art, the motor only rotates in one direction (such as the solution of patent CN219166206U), so the hot fan and the heat dissipation fan can only rotate in one direction. The one-way rotation of the hot fan is not conducive to the optimization of the air flow circulation in the cooking cavity and cannot provide a cooking mode with differentiated exhaust steam, which limits the improvement of the cooking effect.

[0004] To improve air circulation within the cooking chamber or provide differentiated exhaust cooking modes, existing technologies have proposed improvements to the aforementioned types of air fryers, enabling the heating fan to operate in bidirectional rotations, thereby improving the cooking effect of food within the cooking chamber. Specifically, some air fryers utilize a reversible motor to achieve bidirectional operation of the heating fan. It is understandable that, since the heating fan and the cooling fan rotate coaxially, the bidirectional rotation of the heating fan inevitably forces the cooling fan to also rotate in both directions. However, the volute of existing air fryers only has a single volute tongue and does not consider the cooling effect of the cooling fan during both forward and reverse rotations. When applied to air fryers with bidirectional motors, the volute structure of the existing technology can only meet the cooling requirements of the cooling fan in one rotation direction. This means that the exhaust is enhanced in one rotation direction, while the exhaust effect is weakened in the other. This results in a significant temperature rise in the motor, affecting its performance and lifespan.

[0005] Furthermore, in scenarios where the heat and cooling fans rotate in both forward and reverse directions, if the cooling blades are set too large, the load will increase, resulting in a decrease in the power output to the heat fan. This decrease in the speed of the heat fan will affect the air circulation in the cooking chamber, thus reducing cooking efficiency. On the other hand, if the cooling blades are set too small, the heat dissipation capacity will be insufficient. If there is no volute structure around the cooling fan, the heat dissipation effect will be further weakened. Therefore, in order to ensure that the cooling fan can enhance exhaust and meet the heat dissipation requirements in both forward and reverse rotation, the provision of a volute is very necessary. Utility Model Content

[0006] In order to solve the technical problem in the prior art that the heat dissipation fan of an air fryer needs to rotate in both directions due to the bidirectional rotation of the heating fan, and its heat dissipation structure is difficult to meet the requirements of enhancing exhaust and heat dissipation of the motor under bidirectional rotation, resulting in a decrease in the performance and life of the motor, the utility model provides an air fryer with optimized heat dissipation. With the help of the circumferential volute structure of the heat dissipation fan, by adding and reasonably arranging air distribution plates, the heat dissipation problem of the motor under bidirectional rotation can be effectively solved, and the exhaust and heat dissipation of the motor can be enhanced under bidirectional rotation, thereby improving the heat dissipation effect.

[0007] The utility model discloses an air fryer with optimized heat dissipation, comprising a body and a reflective cover arranged in the body, wherein the reflective cover divides the space in the body into a cooking cavity and an installation cavity arranged above the cooking cavity, a heating element and a heat fan are arranged in the cooking cavity, a transversely arranged volute and a motor are arranged in the installation cavity, a heat dissipation fan is arranged in the volute, and the motor drives the heat fan and the heat dissipation fan to rotate simultaneously, the motor has a first direction and a second direction, the volute has a longitudinally extending annular side wall, the annular side wall surrounds the heat dissipation fan, an opening is formed between the two ends of the annular side wall, and the opening is provided with a An air distribution plate extending toward the cooling fan and arranged longitudinally, the air distribution plate and the volute are integrally provided, the air distribution plate separates the opening to form a first opening and a second opening, the distance between the end of the air distribution plate facing the cooling fan and the cooling fan is smaller than the distance between the two ends of the annular side wall and the cooling fan, so that a first volute tongue corresponding to the first direction of the motor and a second volute tongue corresponding to the second direction of the motor are formed on both sides of the end of the air distribution plate facing the cooling fan, the first opening is used for air outlet when the motor is in the first direction, and the second opening is used for air outlet when the motor is in the second direction.

[0008] The air fryer with optimized heat dissipation of the present invention also has the following additional technical features:

[0009] When the motor is in a first rotation direction, the second opening is used for air intake, and when the motor is in a second rotation direction, the first opening is used for air intake; when the motor switches rotation direction, the air intake and air outlet at the first opening are switched, and the air intake and air outlet at the second opening are switched.

[0010] The top end of the annular side wall is provided with a mounting opening, the cooling fan is mounted on the outer rotor of the motor, the motor and the cooling fan are installed in the volute through the mounting opening, a cover plate is provided at the mounting opening, the cover plate at least covers the area between the outer edge of the mounting opening and the outer edge of the blades of the cooling fan, and the cover plate is provided with a ventilation opening; when the motor is in a first direction, the ventilation opening is used as a main air inlet, and the second opening is used as an auxiliary air inlet; when the motor is in a second direction, the ventilation opening is used as a main air inlet, and the first opening is used as an auxiliary air inlet.

[0011] The air distribution plate includes a first air guide surface extending from the first volute tongue toward the opening and a second air guide surface extending from the second volute tongue toward the opening, and the distance between the first air guide surface and the second air guide surface gradually decreases along the direction approaching the opening.

[0012] An included angle between the first air guide surface and a tangent line of one end of the annular side wall is ≤30°, and an included angle between the second air guide surface and a tangent line of the other end of the annular side wall is ≤30°.

[0013] The volute further comprises an air outlet cover arranged on the outer side of the opening and connecting the opening with the outside. An air outlet is provided at one end of the air outlet cover away from the opening, and the air distribution plate extends to the air outlet.

[0014] The air outlet hood is separately arranged from the annular side wall, and the air distribution plate includes a first baffle extending into the opening and a second baffle arranged in the air outlet hood and docking with the first baffle; or, the air outlet hood includes a first air outlet hood and a second air outlet hood which are separately arranged, the first air outlet hood is integrally arranged with the annular side wall, and the second air outlet hood is docking with the first air outlet hood, and the air distribution plate includes a first baffle arranged in the first air outlet hood and extending into the opening, and a second baffle arranged in the second air outlet hood and docking with the first baffle.

[0015] The volute is symmetrically arranged with respect to the air distribution plate.

[0016] The end of the air distribution plate facing the heat dissipation fan is not less than 5 mm away from the outer end of the heat dissipation fan.

[0017] The distance between the annular side wall and the heat dissipation fan gradually decreases from the opening toward a direction away from the opening.

[0018] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:

[0019] 1. The air fryer with optimized heat dissipation of the present invention solves the heat dissipation problem under bidirectional rotation of the motor in the application scenario of bidirectional rotation of the hot fan, that is, the motor can drive the cooling fan to exhaust air smoothly and enhance the exhaust effect under different rotation directions to ensure the performance and life of the motor. In order to solve the above problems, the present application uses a volute and an air distribution plate to form an improved air duct structure. By forming high-pressure areas at the first volute tongue and the second volute tongue respectively, no matter which direction the motor rotates, the air flow can be guided to be discharged from the corresponding opening at the corresponding volute tongue to achieve enhanced exhaust, which can prevent the air flow from continuing to rotate in the area surrounded by the annular side wall and improve the heat dissipation efficiency.

[0020] In addition, the bidirectional rotation of the hot fan is beneficial to improving the air flow path and hot air flow distribution in the cooking cavity, or it can improve the exhaust requirements of the cooking cavity, providing favorable conditions for improving the cooking effect of the ingredients and optimizing the taste of the ingredients.

[0021] 2. As a preferred embodiment, when the motor is in a first rotational direction, the second opening is used for air intake, and when the motor is in a second rotational direction, the first opening is used for air intake; when the motor switches rotational direction, the air intake and air outlet at the first opening are switched, and the air intake and air outlet at the second opening are switched. To further improve the heat dissipation effect within the volute, the first opening and the second opening formed by the air distribution plate are used to switch air intake and air outlet when the motor is in different rotational directions. While one opening is exhausting air, the other opening can draw in some cold air, further improving heat dissipation efficiency.

[0022] As a preferred embodiment of the present embodiment, the top of the annular side wall is provided with a mounting opening, the cooling fan is mounted on the outer rotor of the motor, the motor and the cooling fan are installed in the volute through the mounting opening, a cover is provided at the mounting opening, the cover at least covers the area between the outer edge of the mounting opening and the outer edge of the fan blade of the cooling fan, and the cover is provided with a vent; when the motor is in a first rotation direction, the vent serves as the main air inlet, and the second opening serves as the auxiliary air inlet; when the motor is in a second rotation direction, the vent serves as the main air inlet, and the first opening serves as the auxiliary air inlet. In order to solve the problem that the diameter of the mounting opening in the prior art is large (because the motor and the cooling fan are installed in the volute through the mounting opening, the diameter of the mounting opening must be larger than the outer diameter of the cooling fan), resulting in a portion of the hot air flow being radially ejected from the edge of the mounting opening during the rotation of the cooling fan, and then being sucked into the volute from the inner circle of the mounting opening, resulting in low heat dissipation efficiency, the present application provides a cover that can block at least a portion of the mounting opening to inhibit the hot air flow from circling around, thereby improving heat dissipation efficiency. At the same time, since the cover plate blocks the installation port, resulting in insufficient air intake, the opening of the annular side wall can be divided into two channels for air intake and air outlet through the setting of the air dividing plate. One of the openings can assist in air intake, thereby more effectively improving the heat dissipation efficiency.

[0023] 3. As a preferred embodiment, the air distribution plate includes a first air guide surface extending from the first volute tongue toward the opening and a second air guide surface extending from the second volute tongue toward the opening, with the distance between the first and second air guide surfaces gradually decreasing as they approach the opening. During exhaust, to enhance the airflow guidance effect of the volute tongue and promote smooth exhaust, an air guide surface can be provided behind the volute tongue to guide the airflow toward the corresponding opening. This can prevent the airflow from colliding with the downstream air distribution plate after passing through the volute tongue, affecting wind speed and thus exhaust efficiency, thereby ensuring heat dissipation efficiency.

[0024] Among them, the distance between the first air guide surface and the second air guide surface gradually decreases in the direction approaching the opening, so that the first air guide surface and the second air guide surface can form a certain angle with the downstream air distribution plate, which is conducive to guiding the airflow to make a certain turn through the air guide surface and then be discharged through the corresponding opening, further optimizing the exhaust effect.

[0025] As a preferred embodiment of the present embodiment, the angle between the first air-guiding surface and the tangent of one end of the annular side wall is ≤30°, and the angle between the second air-guiding surface and the tangent of the other end of the annular side wall is ≤30°. Under the premise that the present application can realize the smooth exhaust and heat dissipation of the volute under different rotation directions of the motor, in order to further optimize the exhaust efficiency, the present application is provided with an air-guiding surface. Since the airflow will hit the air distribution plate during the centrifugal rotation to change the flow direction for discharge, the collision process will cause the loss of airflow energy and generate greater noise. By setting an inclined air-guiding surface, the collision angle between the airflow and the air distribution plate can be reduced, the wind resistance can be reduced, the air outlet rate can be increased, and it is also beneficial to reduce noise.

[0026] Taking the first air guide surface as an example, the angle between the first air guide surface and the tangent of one end of the annular side wall is ≤30°, which means that the angle does not exceed positive or negative 30°. When the angle is greater than positive 30°, the channel between the first air guide surface and the annular side wall is too narrow, which will limit the air outlet efficiency. When the angle is greater than negative 30°, the first air guide surface is tilted away from the annular side wall, which makes it difficult to effectively guide the airflow, and easily causes the airflow to collide with the first air guide surface to a large extent, which is not conducive to improving the exhaust efficiency.

[0027] 4. As a preferred embodiment, the volute further includes an air outlet hood disposed on the outside of the opening, connecting the opening with the outside world. The air outlet hood is provided with an exhaust port at one end away from the opening, and the air distributor plate extends to the exhaust port. By providing the air outlet hood, an air outlet channel is formed within it, which can extend the exhaust path and thereby achieve the effect of reducing noise. To further prevent the hot air flow from detouring at the exhaust port, causing partial hot air backflow and affecting the heat dissipation effect, the air distributor plate extends to the exhaust port, ensuring that the hot air flow is completely discharged from the exhaust port, thereby ensuring heat dissipation efficiency.

[0028] As a preferred embodiment of this embodiment, the air outlet hood is provided separately from the annular sidewall, and the air distributor plate includes a first baffle extending into the opening and a second baffle disposed within the air outlet hood and docking with the first baffle. The use of separate annular sidewalls and air outlet hoods reduces the difficulty of manufacturing each component, while the use of the first and second baffles to form the air distributor plate facilitates extending the length of the air distributor plate, allowing it to extend to the exhaust port, thereby preventing hot air backflow and ensuring exhaust efficiency. By docking the first and second baffles when installing the air outlet hood, operation is simplified and convenient.

[0029] Alternatively, the air outlet hood includes a first air outlet hood and a second air outlet hood that are separately provided, the first air outlet hood being integrally provided with the annular side wall, the second air outlet hood being docked with the first air outlet hood, and the air distributor plate including a first baffle plate provided in the first air outlet hood and extending into the opening, and a second baffle plate provided in the second air outlet hood and docked with the first baffle plate. In this solution, the use of the first and second separate air outlet hoods can reduce the volume of a single separate air outlet hood, facilitate the integrated manufacturing of the first air outlet hood and the annular side wall, and ensure that the air outlet hood as a whole has a certain length, so as to extend the exhaust path and achieve the effect of reducing noise; the use of the first baffle plate and the second baffle plate to jointly form the air distributor plate is conducive to extending the length of the air distributor plate, so that the air distributor plate can extend to the exhaust port to avoid backflow of hot air flow, thereby ensuring exhaust efficiency.

[0030] 5. As a preferred embodiment, the volute is symmetrically arranged with respect to the air distributor. To ensure exhaust efficiency when the motor rotates in different directions, the present application adopts a symmetrical volute structure, so that the cross-sections of the two openings separated by the air distributor are uniform, thereby avoiding the phenomenon that one of the first opening and the second opening is too large and the other is too small. This allows the motor to enhance exhaust and improve heat dissipation in both the first and second rotation directions, and achieve similar exhaust effects.

[0031] 6. As a preferred embodiment, the end of the air distributor plate facing the cooling fan is at least 5 mm away from the outer end of the cooling fan. By limiting the position of the air distributor plate, the inner end of the air distributor plate can be prevented from interfering with the rotation of the cooling fan, thereby ensuring the reliability of the cooling fan.

[0032] 7. As a preferred embodiment, the distance between the annular sidewall and the cooling fan gradually decreases from the opening toward the direction away from the opening. By eccentrically positioning the cooling fan relative to the annular sidewall, a high-pressure zone is formed in the cooling air duct within the annular sidewall at a position away from the opening relative to the opening. As a result, the rotation of the cooling fan drives the airflow toward the opening more smoothly, enhancing exhaust flow and improving cooling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0034] Figure 1 This is a structural diagram of an air fryer according to one embodiment of the present application.

[0035] Figure 2This is a schematic diagram of the airflow path of the motor in the first turning lower volute according to one embodiment of the present application.

[0036] Figure 3 for Figure 2 A magnified schematic diagram of the structure at center A.

[0037] Figure 4 This is a schematic diagram of the airflow path of the motor in the second turning lower volute according to one embodiment of the present application.

[0038] Figure 5 for Figure 4 A magnified schematic diagram of the structure at point B.

[0039] Figure 6 This is an exploded schematic diagram of the components of the volute, cooling fan, reflector cover and air outlet cover in one embodiment of the present application.

[0040] Figure 7 This is a schematic diagram of the airflow path of the motor inside the first turning lower reflector in one embodiment of the present application.

[0041] Figure 8 This is a schematic diagram of the airflow path of the lower motor inside the second steering lower reflector in one embodiment of the present application.

[0042] Reference numerals:

[0043] 10. Machine body; 11. Reflector; 12. Heating element; 13. Hot fan; 14. Volute; 15. Cooling fan; 141. Annular side wall; 142. Opening; 16. Air distributor; 161. Air distributor body; 17. First volute tongue; 18. Second volute tongue; 143. First opening; 144. Second opening; 19. Air guide portion; 191. First air guide surface; 192. Second air guide surface; 20. Air outlet hood; 21. Exhaust port; 201. First sub-channel; 202. Second sub-channel; 145. Mounting port; 162. First baffle; 163. Second baffle; 111. Hood top wall; 112. Hood side wall; 113. Exhaust port; 22. First end; 23. Second end; 101. Cooking cavity; 102. Mounting cavity. DETAILED DESCRIPTION

[0044] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in combination with the accompanying drawings by way of examples.

[0045] In order to more clearly understand the above-mentioned objects, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other in the absence of conflict.

[0046] It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0047] In addition, in the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0049] In this utility model, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood broadly. For example, they can refer to fixed connections, removable connections, or integration; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or an interaction between two components. However, the phrase "direct connection" indicates that the two connected entities are not connected through a transition structure, but are connected solely through a connecting structure to form a single entity. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0050] In the present invention, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0051] like Figures 1 to 8 As shown, the present application provides an air fryer with optimized heat dissipation, comprising a body 10 and a reflective cover 11 arranged in the body 10, the reflective cover 11 divides the space in the body 10 into a cooking cavity 101 and an installation cavity 102 arranged above the cooking cavity 101, the cooking cavity 101 is provided with a heating element 12 and a hot fan 13, the installation cavity 102 is provided with a transversely arranged volute 14 and a motor, the volute 14 is provided with a heat dissipation fan 15, the motor drives the hot fan 13 and the heat dissipation fan 15 to rotate simultaneously, the motor has a first direction and a second direction, the volute 14 has a longitudinally extending annular side wall 141, the annular side wall 141 surrounds the heat dissipation fan 15, and an opening 142 is formed between the two ends of the annular side wall 141, the An air distribution plate 16 extending toward the cooling fan 15 and arranged longitudinally is provided at the opening 142. The air distribution plate 16 is integrally arranged with the volute 14. The air distribution plate 16 separates the opening 142 into a first opening 143 and a second opening 144. The distance between the end of the air distribution plate 16 facing the cooling fan 15 and the cooling fan 15 is smaller than the distance between the two ends of the annular side wall 141 and the cooling fan 15, so that a first volute tongue 17 corresponding to the first direction of the motor and a second volute tongue 18 corresponding to the second direction of the motor are formed on both sides of the end of the air distribution plate 16 facing the cooling fan 15. The first opening 143 is used for air outlet when the motor is in the first direction, and the second opening 144 is used for air outlet when the motor is in the second direction.

[0052] Specifically, compared with the prior art solution of setting a single volute tongue on a single volute, the present application adopts an air distribution plate 16 to form two volute tongues on both sides, such as Figure 2 and Figure 4 As shown, the air distribution plate 16 separates the opening 142 into a first opening 143 and a second opening 144. When the motor rotates along the first direction, as shown in FIG. Figure 2 and Figure 3 As shown, the airflow can be guided by the first volute 17 under the centrifugal action of the cooling fan 15 so that the airflow is discharged from the first opening 143; when the motor rotates along the second direction, as shown Figure 4 and Figure 5 As shown, under the centrifugal force of cooling fan 15, airflow is guided by second volute 18 so that it is discharged from second opening 144. This allows for enhanced exhaust regardless of motor rotation, preventing poor operating conditions due to poor heat dissipation at certain motor rotational directions, thereby extending the motor's service life. The volute guides airflow out of the corresponding opening while preventing it from circulating within the area enclosed by annular sidewall 141, thereby ensuring efficient heat dissipation.

[0053] by Figure 2For illustration purposes, the distance from the first volute 17 to the cooling fan 15 is minimal, being smaller than the distance from any point on the annular sidewall 141 of the volute 14 to the cooling fan 15. Preferably, the air pressure at the first volute 17 is greater than the air pressure in other areas within the area enclosed by the annular sidewall 141. Therefore, when the motor rotates along the first direction, upon reaching the first opening 143, the airflow has difficulty flowing through the relatively high-pressure first volute 17 and continues to rotate within the area enclosed by the annular sidewall 141. This allows the airflow to be easily discharged from the first opening 143, achieving heat dissipation and enhanced exhaust. The principle of exhausting air along the second direction is similar to that described above and will not be further elaborated here.

[0054] It should be noted that, for the solution in which the installation cavity 102 and the cooking cavity 101 are arranged vertically, the lateral arrangement of the volute 14 means that the volute 14 is arranged horizontally, that is, the annular side wall 141 of the volute 14 is perpendicular to the reflector 11 .

[0055] Further, such as Figure 2 As shown, when the motor rotates along the first direction, the air flow is discharged from the first opening 143 for heat dissipation. At the same time, due to the negative pressure in the area surrounded by the annular side wall 141, the second opening 144 can absorb air at this time, that is, the second opening 144 can absorb cold air into the volute 14, which can further improve the heat dissipation effect in the volute 14.

[0056] like Figure 4 As shown, when the motor rotates along the second direction, the air flow is discharged from the second opening 144 for heat dissipation. At the same time, due to the negative pressure in the area surrounded by the annular side wall 141, the first opening 143 can absorb air at this time, that is, the first opening 143 can absorb cold air into the volute 14, which can further improve the heat dissipation effect in the volute 14.

[0057] That is, only the first opening 143 or the second opening 144 can be used as an air intake port and thus as the air intake structure of the volute 14. In this case, there is no need to provide an additional air inlet, which helps simplify the structure of the volute 14. Of course, it is also possible to provide an additional air inlet and use the first opening 143 or the second opening 144 as an auxiliary air inlet. Air is introduced through the air inlet and the auxiliary air inlet at the same time, which helps improve heat dissipation efficiency.

[0058] The first direction of the motor is, for example, that the motor rotates in a clockwise direction, and the second direction of the motor is, for example, that the motor rotates in a counterclockwise direction (e.g., Figure 2 and Figure 4 As shown), of course, the first turn can also be rotated in the counterclockwise direction, and the second turn can also be rotated in the clockwise direction. Figure 2 and Figure 4 The first opening 143 and the second opening 144 in the embodiment can be swapped.

[0059] As a preferred embodiment, the second opening 144 is used for air intake when the motor is in the first direction, and the first opening 143 is used for air intake when the motor is in the second direction; when the motor switches direction, the air intake and air outlet at the first opening 143 are switched, and the air intake and air outlet at the second opening 144 are switched.

[0060] In order to further improve the heat dissipation effect in the volute 14, the first opening 143 and the second opening 144 formed by the air distribution plate 16 are used to switch the air inlet and outlet when the motor is in different directions. While one opening is exhausting air, the other opening can absorb some cold air, further improving the heat dissipation efficiency. Figure 2 and Figure 4 As shown, the functions of the first opening 143 and the second opening 144 are not limited to air intake or air discharge alone, but play different roles according to different rotation directions of the motor, further optimizing the air duct structure formed by the volute 14 and the air distributor 16.

[0061] Furthermore, in one embodiment, Figure 6 As shown, a mounting opening 145 is provided at the top of the annular side wall 141, and the cooling fan 15 is installed on the outer rotor of the motor. The motor and the cooling fan 15 are installed in the volute 14 through the mounting opening 145. A cover plate (not shown in the figure) is provided at the mounting opening 145, and the cover plate at least covers the area between the outer edge of the mounting opening 145 and the outer edge of the blade of the cooling fan 15, and the cover plate is provided with a ventilation opening; when the motor is in the first direction, the ventilation opening is used as the main air inlet, and the second opening 144 is used as the auxiliary air inlet; when the motor is in the second direction, the ventilation opening is used as the main air inlet, and the first opening 143 is used as the auxiliary air inlet.

[0062] In order to solve the problem in the prior art that the diameter of the mounting port 145 is large (since the motor and the cooling fan 15 are installed in the volute 14 through the mounting port 145, the diameter of the mounting port 145 must be larger than the outer diameter of the cooling fan 15), which causes a part of the hot air flow to be discharged from the edge of the mounting port 145 when the cooling fan 15 is radially thrown out during rotation, and then sucked into the volute 14 from the inner circle of the mounting port 145, resulting in low heat dissipation efficiency, the present application provides a cover plate, which can block at least part of the area of ​​the mounting port 145 to suppress the circuitous circulation of the hot air flow, thereby improving the heat dissipation efficiency. At the same time, no matter which direction the motor rotates, the vents on the cover plate are used as the main air inlet to ensure the amount of cold air flowing into the volute 14, and one of the openings can also assist in air intake, thereby more effectively improving the heat dissipation efficiency.

[0063] Specifically, the outer rotor motor provides a more stable and reliable installation of the cooling fan 15, which can improve the transmission efficiency of the cooling fan 15 and improve the working stability. The motor and the cooling fan 15 can be connected as a whole by, for example, welding or heat nesting, or the cooling fan 15 can be directly formed by the outer rotor of the motor. The motor and the cooling fan 15 are usually pre-assembled, and then when they are installed with the components of the air fryer, the motor needs to be installed into the cooling air duct from the installation port 145 position, which requires that the opening diameter of the installation port 145 be larger than the outer diameter of the blades of the cooling fan 15. After the cooling fan 15 is installed, if there is no obstruction at the installation port 145, then when the air fryer is in use, when the motor dissipates heat, a part of the hot air flow will be thrown out from the edge of the blade and flow out through the installation port 145. This part of the hot air flow will then be sucked back into the cooling air duct by the cooling fan 15, thus forming a partial hot air backflow, resulting in a decrease in the cooling rate of the motor and affecting the heat dissipation efficiency. It can be seen from the radial ejection of the airflow that the airflow is easily ejected from the opening from the outer edge of the fan blade to the outer edge of the mounting port 145. Based on this, by setting a cover plate that at least blocks the area between the outer edge of the mounting port 145 and the outer edge of the fan blade of the cooling fan 15, the outflow and re-inhalation of the hot air flow can be effectively prevented, and the backflow of the hot air flow can be prevented, thereby improving the heat dissipation efficiency and improving the heat dissipation effect of the motor.

[0064] During the heat dissipation process of the motor, the external airflow (cold air) mainly flows into the volute 14 through the vents on the cover plate. The amount of cold air flowing in from the vents ensures that the motor meets the heat dissipation requirements, and on the basis of the auxiliary air intake of the first opening 143 or the second opening 144, the heat dissipation efficiency is further improved. The cover plate preferentially blocks the peripheral area of ​​the installation port 145, and the central area can be reserved for air intake. As a preferred embodiment, the air distribution plate 16 includes a first air guide surface 191 extending from the first volute tongue 17 toward the direction close to the opening 142 and a second air guide surface 192 extending from the second volute tongue 18 toward the direction close to the opening 142, and the distance between the first air guide surface 191 and the second air guide surface 192 gradually decreases in the direction close to the opening 142.

[0065] During exhaust, in order to strengthen the guiding effect of the volute tongue on the airflow and promote smooth exhaust, an air guide surface can be set behind the volute tongue to guide the airflow toward the corresponding opening for exhaust. This can avoid the airflow colliding with the downstream air distribution plate 16 after passing through the volute tongue, affecting the wind speed and thus affecting the exhaust efficiency, thereby ensuring the heat dissipation efficiency.

[0066] Specifically, the air distribution plate 16 includes an air distribution plate body 161 and an air guide portion 19 connected to an inner end of the air distribution plate body 161 . A first air guide surface 191 and a second air guide surface 192 are formed on the air guide portion 19 .

[0067] Preferably, the angle between the first air guide surface 191 and the tangent line of one end of the annular side wall 141 is ≤30°, and the angle between the second air guide surface 192 and the tangent line of the other end of the annular side wall 141 is ≤30°.

[0068] like Figure 3 and Figure 5 As shown, the air distribution plate body 161 is arranged horizontally, and the first air guide surface 191 and the second air guide surface 192 are respectively inclined and face the annular side wall 141 on different sides. By setting the air guide surfaces, the impact angle between the airflow and the air distribution plate body 161 can be reduced, the wind resistance can be reduced, the air outlet rate can be increased, and it is also beneficial to reduce noise.

[0069] The angle between the first air guide surface 191 and the tangent of one end of the annular side wall 141 being ≤30° means that the angle does not exceed plus or minus 30°, and the angle between the second air guide surface 192 and the tangent of the other end of the annular side wall 141 being ≤30° means that the angle does not exceed plus or minus 30°. When the first air guide surface 191 and the tangent of one end of the annular side wall 141 are parallel, the angle is 0°. At this time, a uniform channel is formed between the first air guide surface 191 and the annular side wall 141, which is conducive to reducing wind resistance during air discharge, improving exhaust efficiency, and making exhaust smoother. When the second air guide surface 192 and the tangent of the other end of the annular side wall 141 are parallel, the angle is 0°. At this time, a uniform channel is formed between the second air guide surface 192 and the annular side wall 141, which is conducive to reducing wind resistance during air discharge, improving exhaust efficiency, and making exhaust smoother.

[0070] Regarding the structure of the air guide portion 19, preferably, the air guide portion 19 is a prism structure, for example, a triangular prism structure, such as Figure 3 and Figure 5 As shown, the outer periphery of the air guide portion 19 includes a first air guide surface 191, a second air guide surface 192, and a transition surface between the first air guide surface 191 and the second air guide surface 192. The prismatic structure provides superior mechanical strength, improving operational stability and reliability while preventing deformation, cracking, or breakage of the first and second air guide surfaces 191, 192. When a triangular prism-shaped air guide portion 19 is employed, the air guide portion 19 includes a first edge proximal to the air divider plate body 161 and second and third edges distal to the air divider plate body 161. The second and third edges are symmetrically arranged about the first edge. In this case, the first volute tongue 17 is formed at the location of the second edge, and the second volute tongue 18 is formed at the location of the third edge.

[0071] It is understood that in other embodiments, the formation of the air guide portion 19 can be further simplified. For example, the air guide portion 19 may include a first air guide plate and a second air guide plate, each of which is connected at one end to the air distributor body 161. The first air guide plate forms a first air guide surface 191 on the side facing the annular side wall 141, and the second air guide plate forms a second air guide surface 192 on the side facing the annular side wall 141. The first and second air guide plates are connected in opposite directions, forming the first and second air guide surfaces 191 and 192, respectively. This simplifies the structure and facilitates control of the inclination angles of the first and second air guide surfaces 191 and 192. Preferably, the first and second air guide plates are integrally formed with the air distributor body 161. In other embodiments, the first and second air guide plates may also be separate from the air distributor body 161, and the first and second air guide plates may be welded to the air distributor body 161, for example. In this embodiment, the first volute tongue 17 is formed at the end of the first air guide plate facing the heat dissipation fan 15 , and the second volute tongue 18 is formed at the end of the second air guide plate facing the heat dissipation fan 15 .

[0072] As a preferred embodiment of the present application, the volute 14 also includes an air outlet hood 20 arranged on the outside of the opening 142 to connect the opening 142 with the outside world. The air outlet hood 20 is provided with an exhaust port 21 at one end away from the opening 142, and the air distribution plate 16 extends to the exhaust port 21.

[0073] like Figure 1 、 Figure 2 、 Figure 4 or Figure 6 As shown, the volute 14 adopts an annular cover structure, and an annular heat dissipation duct is formed inside it. In order to further extend the exhaust path, the present application is provided with an air outlet cover 20, and an air outlet channel is formed inside it, which can extend the exhaust path and thus achieve the effect of reducing noise. In order to further prevent the hot air flow from meandering at the exhaust port 21 and causing part of the hot air flow to reflux and affect the heat dissipation effect, the air distribution plate 16 extends to the exhaust port 21, which can ensure that the hot air flow is completely discharged from the exhaust port 21, thereby ensuring the heat dissipation efficiency.

[0074] Furthermore, the air distribution plate 16 divides the channel in the air outlet cover 20 into two sub-channels, for example, Figure 2 As shown, when the motor rotates along the first direction, the airflow flows from the first opening 143 into the first sub-channel 201 and then is discharged from the first sub-channel 201 through the exhaust port 21; at the same time, the second sub-channel 202 will draw cold air into the volute 14, which can further improve the heat dissipation effect in the volute 14. Figure 4As shown, when the motor rotates along the second direction, the air flow flows into the second sub-channel 202 from the second opening 144 and then is discharged from the second sub-channel 202 through the exhaust port 21; at the same time, the first sub-channel 201 will absorb cold air into the volute 14, which can further improve the heat dissipation effect in the volute 14.

[0075] Furthermore, in one embodiment, the air outlet cover 20 is separated from the annular side wall 141, and the air distribution plate 16 includes a first baffle 162 extending into the opening 142 and a second baffle 163 disposed in the air outlet cover 20 and docking with the first baffle 162. Figure 2 、 Figure 4 or Figure 6 As shown, by adopting a split annular side wall 141 and an air outlet cover 20, the processing difficulty of each component can be reduced, and the first baffle 162 and the second baffle 163 are used to form the air distribution plate 16, which is conducive to extending the length of the air distribution plate 16 so that the air distribution plate 16 can extend to the air outlet 21 to avoid the backflow of hot air flow, thereby ensuring the exhaust efficiency; by docking the first baffle 162 and the second baffle 163 when installing the air outlet cover 20, the operation is simple and easy to use.

[0076] Specifically, the air hood 20 and the annular side wall 141 can be installed by means such as plugging, screw connection, etc., and the first baffle 162 and the second baffle 163 can be connected by abutting each other. For example, the end surfaces of the first baffle 162 and the second baffle 163 are both flat and can be connected by flat surfaces, or the end surfaces of the first baffle 162 and the second baffle 163 are stepped surfaces that mesh with each other and can be connected by stepped surfaces. This application is not limited to this. In this embodiment, the first baffle 162 is integrally provided with the volute portion where the annular side wall 141 is located, and the second baffle 163 is integrally provided with the air hood 20.

[0077] In another embodiment, the air outlet hood 20 includes a first air outlet hood and a second air outlet hood that are separately provided. The first air outlet hood is integrally provided with the annular side wall 141, and the second air outlet hood is docked with the first air outlet hood. The air distributor 16 includes a first baffle provided in the first air outlet hood and extending into the opening 142, and a second baffle provided in the second air outlet hood and docked with the first baffle. The use of a separate first and second air outlet hood can reduce the volume of a single separate air outlet hood, facilitate the integrated manufacturing of the first air outlet hood and the annular side wall 141, and ensure that the air outlet hood as a whole has a certain length so as to extend the exhaust path to achieve the effect of reducing noise. The use of the first baffle and the second baffle to jointly form the air distributor 16 is conducive to extending the length of the air distributor 16 so that the air distributor 16 can extend to the exhaust port 21 to avoid backflow of hot air flow, thereby ensuring exhaust efficiency. In this embodiment, the first baffle is integrally provided with the annular side wall 141 and the volute portion where the first air outlet hood is located, and the second baffle is integrally provided with the second air outlet hood.

[0078] As a preferred embodiment of the present application, the volute 14 is symmetrically arranged with respect to the air distribution plate 16 .

[0079] like Figure 2 or Figure 4 As shown, the air distribution plate 16 is located in the middle of the opening 142, so that the cross-sections of the first opening 143 and the second opening 144 separated by the air distribution plate 16 are uniform, thereby avoiding the phenomenon that one opening is too large and the other opening is too small. This allows the motor to enhance exhaust and improve heat dissipation in both the first and second directions, and have similar exhaust effects.

[0080] As a preferred embodiment of the present application, the end of the air distributor 16 facing the cooling fan 15 is at least 5 mm away from the outer end of the cooling fan 15. By limiting the position of the air distributor 16, its inner end can be prevented from interfering with the rotation of the cooling fan 15, thereby ensuring the reliability of the cooling fan 15.

[0081] As a preferred embodiment of the present application, the distance between the annular side wall 141 and the heat dissipation fan 15 gradually decreases from the opening 142 toward a direction away from the opening 142 .

[0082] like Figure 2 or Figure 4 As shown, by eccentrically disposing the cooling fan 15 relative to the annular side wall 141, a high-pressure area can be formed in the cooling air duct in the annular side wall 141 at a position away from the opening 142 relative to the opening 142. As a result, during the rotation of the cooling fan 15, the air flow can be driven to move more smoothly toward the opening 142, thereby enhancing the smoothness of exhaust and improving the heat dissipation efficiency.

[0083] As a preferred embodiment of the present application, the reflective cover 11 includes a cover top wall 111 and a cover side wall 112 extending downward from the edge of the cover top wall 111, and the cover side wall 112 is provided with an exhaust port 113 connected to the outside world. Along the rotation direction of the first direction of the motor, the exhaust port 113 has a first end 22 and a second end 23 arranged in sequence, and the first end 22 of the exhaust port 113 is the closest point from the hot fan 13 to the cover side wall 112, so as to form a high-pressure area at the first end 22, so that the exhaust volume of the motor during the second direction of rotation is greater than the exhaust volume of the motor during the first direction of rotation.

[0084] In this embodiment, the reflector 11 is in the shape of a volute, and with the help of different rotation directions of the motor, the cooking chamber 101 can achieve different steam exhaust volumes, which can realize two modes of tender baking and crispy baking and ensure the difference in cooking taste in different modes. Compared with the traditional method of adding a micro-pressure valve, the overall structure of the air fryer is simplified, and users can choose a working mode that matches it according to the type of ingredients to improve the cooking taste and achieve diversified cooking taste.

[0085] like Figure 7 As shown, when the motor rotates along the first direction, the airflow can quickly pass through the exhaust port 113 based on inertia (flowing from high pressure to low pressure) and then continue to rotate and circulate in the reflector 11, which can achieve the effect of reducing exhaust, which is beneficial to maintaining the moisture of the food and achieving a tender roasting effect, such as making chicken wings; Figure 8 As shown, when the motor rotates along the second direction, when the airflow passes through the exhaust port 113, it is difficult for the second end 23 with relatively low pressure to directly pass through the exhaust port 113 to reach the first end 22 with relatively high pressure, so that the airflow is easily discharged from the exhaust port 113. Therefore, the exhaust volume can be increased in this mode (compared with the previous one), which is beneficial to the crispness of the food and achieves a crispy roasting effect, such as making French fries.

[0086] It should be noted that while optimizing the structure of the volute 14 to solve the heat dissipation problem during forward and reverse rotation of the motor, the present application further optimizes the air duct structure in the cooking cavity 101 (i.e., the structure of the reflector 11) on the basis of the motor having different rotation directions, thereby being able to simultaneously achieve different exhaust volumes of the motor under different rotation directions without increasing costs, thereby obtaining two cooking modes.

[0087] Since the motor has two modes of increased exhaust volume and decreased exhaust volume under different rotation directions, different cooking effects can be obtained. However, even if the exhaust volume is reduced, the temperature rise will increase, so it is necessary to strengthen the heat dissipation. Conventional heat dissipation structures and heat dissipation ducts are difficult to meet such heat dissipation requirements. The heat dissipation structure and heat dissipation duct of the volute 14 of the present application can just solve the heat dissipation problem in the two cooking modes, and can enable the above-mentioned two cooking modes to achieve a certain heat dissipation effect to be reliable. That is, the design of the heat dissipation structure of the volute 14 of the present application provides favorable conditions for realizing the above-mentioned two cooking modes, ensures the heat dissipation effect in the two cooking modes, and is conducive to improving the reliability of the air fryer.

[0088] The technical solutions protected by this utility model are not limited to the above-described embodiments. It should be noted that the combination of the technical solutions of any one embodiment with the technical solutions of one or more other embodiments falls within the scope of protection of this utility model. Although the above description of this utility model has been provided in detail using general instructions and specific embodiments, it is obvious to those skilled in the art that modifications or improvements can be made based on this utility model. Therefore, such modifications or improvements made without departing from the spirit of this utility model are within the scope of protection claimed by this utility model.

Claims

1. An air fryer with optimized heat dissipation, comprising a body and a reflector arranged in the body, wherein the reflector divides the space in the body into a cooking cavity and an installation cavity arranged above the cooking cavity, wherein a heating element and a heat fan are arranged in the cooking cavity, wherein a volute and a motor are arranged transversely in the installation cavity, wherein a heat dissipation fan is arranged in the volute, and wherein: The motor drives the hot fan and the cooling fan to rotate simultaneously, the motor has a first direction and a second direction, the volute has a longitudinally extending annular side wall, the annular side wall surrounds the cooling fan, an opening is formed between the two ends of the annular side wall, the opening is provided with an air distribution plate extending toward the cooling fan and arranged longitudinally, the air distribution plate is integrally arranged with the volute, the air distribution plate separates the opening to form a first opening and a second opening, the distance between the end of the air distribution plate facing the cooling fan and the cooling fan is smaller than the distance between the two ends of the annular side wall and the cooling fan, so that the first volute tongue corresponding to the motor in the first direction and the second volute tongue corresponding to the motor in the second direction are respectively formed on both sides of the end of the air distribution plate facing the cooling fan, the first opening is used for air outlet when the motor is in the first direction, and the second opening is used for air outlet when the motor is in the second direction.

2. The air fryer with optimized heat dissipation according to claim 1, characterized in that: When the motor is in the first direction, the second opening is used for air intake, and when the motor is in the second direction, the first opening is used for air intake; when the motor switches direction, the air intake and air outlet at the first opening are switched, and the air intake and air outlet at the second opening are switched.

3. The air fryer with optimized heat dissipation according to claim 2, characterized in that: The top end of the annular side wall is provided with a mounting opening, the cooling fan is mounted on the outer rotor of the motor, the motor and the cooling fan are installed in the volute through the mounting opening, a cover plate is provided at the mounting opening, the cover plate at least covers the area between the outer edge of the mounting opening and the outer edge of the blade of the cooling fan, and the cover plate is provided with a ventilating opening; When the motor is in a first direction, the vent is used as a main air inlet, and the second opening is used as an auxiliary air inlet. When the motor is in a second direction, the vent is used as a main air inlet, and the first opening is used as an auxiliary air inlet.

4. The air fryer with optimized heat dissipation according to claim 1, characterized in that: The air distribution plate includes a first air guide surface extending from the first volute tongue toward the opening and a second air guide surface extending from the second volute tongue toward the opening, and the distance between the first air guide surface and the second air guide surface gradually decreases along the direction approaching the opening.

5. The air fryer with optimized heat dissipation according to claim 4, characterized in that: An included angle between the first air guiding surface and a tangent line at one end of the annular side wall is ≤30°, and an included angle between the second air guiding surface and a tangent line at the other end of the annular side wall is ≤30°.

6. The air fryer with optimized heat dissipation according to claim 1, characterized in that: The volute also includes an air outlet cover arranged on the outer side of the opening and connecting the opening with the outside. An air outlet is provided at one end of the air outlet cover away from the opening, and the air distribution plate extends to the air outlet.

7. The air fryer with optimized heat dissipation according to claim 6, characterized in that: The air outlet cover is separately arranged from the annular side wall, and the air distribution plate includes a first baffle extending into the opening and a second baffle arranged in the air outlet cover and docking with the first baffle; Alternatively, the air outlet hood includes a first air outlet hood and a second air outlet hood which are separately arranged, the first air outlet hood is integrally arranged with the annular side wall, the second air outlet hood is docked with the first air outlet hood, and the air dividing plate includes a first baffle plate arranged in the first air outlet hood and extending into the opening, and a second baffle plate arranged in the second air outlet hood and docked with the first baffle plate.

8. The air fryer with optimized heat dissipation according to claim 1, characterized in that: The volute is symmetrically arranged with respect to the air distribution plate.

9. The air fryer with optimized heat dissipation according to claim 1, characterized in that: The end of the air distribution plate facing the heat dissipation fan is not less than 5 mm away from the outer end of the heat dissipation fan.

10. The air fryer with optimized heat dissipation according to claim 1, characterized in that: The distance between the annular side wall and the heat dissipation fan gradually decreases from the opening toward a direction away from the opening.

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