Air fryer capable of improving heat dissipation efficiency

Abstract

The air fryer comprises a cooking cavity and an installation cavity formed above the cooking cavity, a motor assembly and an air duct cover forming a heat dissipation air duct are arranged in the installation cavity, the motor assembly comprises a motor and a heat dissipation fan which are connected into a whole, the motor is provided with an outer rotor, and the outer rotor is provided with an inner rotor. The cooling fan is arranged on the peripheral wall of the outer rotor, a mounting opening is formed in the top of the air duct cover, the motor assembly is installed in the cooling air duct through the mounting opening, an air duct cover plate is arranged at the mounting opening, and the air duct cover plate at least shields the area between the outer edge of the mounting opening and the outer edge of a fan blade of the cooling fan. On the premise of ensuring that the motor and the cooling fan can be smoothly mounted at the mounting port, the air duct cover plate is additionally arranged to at least partially shield the opening of the mounting port to prevent hot air flow from flowing back, so that the cooling efficiency is improved.

Description

Technical Field

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

[0002] In existing air fryers, the cooking chamber relies on a hot fan to drive the hot air flow to fry the food. A motor that drives the hot fan is provided outside the cooking chamber. During the operation of the air fryer, the temperature near the motor is relatively high, so a cooling fan is generally provided to dissipate the heat to ensure the performance and life of the air fryer. In order to further improve the heat dissipation effect, a heat dissipation duct is generally provided outside the cooling fan to forcibly separate the air inlet and outlet to improve the heat dissipation effect.

[0003] In the existing air fryers with external rotor motors, the cooling fan is usually fixed together with the motor to form a motor assembly. A mounting port for mounting the motor assembly is provided at the top of the cooling air duct. The motor assembly is installed from top to bottom from the mounting port into the cooling air duct. For ease of installation, the diameter of the mounting port is often larger than the outer diameter of the blades of the cooling fan. However, the cooling fan has the characteristic of radial wind throwing when working. During the operation of the cooling fan, an overly large mounting port will cause part of the airflow thrown out from the periphery of the blades of the cooling fan to be discharged from the outer ring of the mounting port, resulting in the reflux of hot air, which greatly affects the cooling efficiency. Utility Model Content

[0004] In order to solve the technical problem in the prior art that when the outer rotor motor and the cooling fan of the air fryer are integrally installed, the opening of the cooling fan installation port on the top of the air duct cover is too large, which causes a part of the air flow to circulate in and out of the installation port and thus leads to low cooling efficiency, the utility model provides an air fryer with improved heat dissipation efficiency. Under the premise that the installation port can smoothly install the motor and the cooling fan, an air duct cover is additionally provided to at least partially block the opening of the installation port to prevent the hot air flow from flowing back, thereby improving the cooling efficiency.

[0005] The utility model discloses an air fryer with improved heat dissipation efficiency, comprising a cooking cavity and an installation cavity arranged above the cooking cavity, wherein a motor assembly and an air duct cover forming a heat dissipation air duct are arranged in the installation cavity, wherein the motor assembly comprises a motor and a heat dissipation fan connected as one body, wherein the motor has an outer rotor, and the heat dissipation fan is arranged on the outer peripheral wall of the outer rotor, wherein a mounting opening is arranged on the top of the air duct cover, wherein the motor assembly is installed in the heat dissipation air duct through the mounting opening, and an air duct cover is arranged at the mounting opening, wherein the air duct cover at least covers an area between an outer edge of the mounting opening and an outer edge of a blade of the heat dissipation fan.

[0006] The air fryer with improved heat dissipation efficiency of the utility model also has the following additional technical features:

[0007] The air duct cover at least covers the area between the outer edge of the mounting opening and the midpoint of the blades of the heat dissipation fan.

[0008] The air duct cover plate includes an annular cover body and an air inlet formed in the middle of the cover body, and the cover body at least covers the area between the outer edge of the installation opening and the outer edge of the blade of the heat dissipation fan.

[0009] The motor assembly comprises a motor bracket, the motor bracket is fixed above the air duct cover, the motor is hoisted below the motor bracket, and the air duct cover plate is arranged above the motor bracket.

[0010] The motor bracket includes a main body portion fixed to the motor and a plurality of bracket arms extending radially outward from the main body portion, and vents are formed between adjacent bracket arms, and the vents are directly opposite to the air inlet.

[0011] The top outer edge of the air duct cover is provided with a cover top wall extending inwardly, and the cover top wall is provided with a fixing column extending upwardly, and the motor bracket is fixed to the fixing column and the two are isolated by a shock-absorbing pad.

[0012] The outer edge of the air duct cover is provided with a notch to avoid the fixing column.

[0013] The motor bracket and the air duct cover are integrally formed.

[0014] The heat dissipation fan comprises an annular body connected to the outer rotor and a plurality of base plates extending radially outward from the annular body. The fan blades of the heat dissipation fan are connected to the base plates and extend upward.

[0015] The air duct cover completely covers the installation opening, and an air inlet is arranged at the bottom of the air duct cover.

[0016] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:

[0017] 1. The utility model provides an air fryer with improved heat dissipation efficiency. In order to solve the problem in the prior art that the top mounting opening of the air duct cover is too large, causing a part of the hot air flow to circulate in and out of the mounting opening, thereby causing low heat dissipation efficiency, an air duct cover is provided, which at least blocks the area between the outer edge of the mounting opening and the outer edge of the fan blade of the heat dissipation fan, thereby preventing the hot air flow driven by the rotation of the heat dissipation fan from being diverted from the above-mentioned blocked area, that is, preventing the hot air flow from flowing back, thereby improving the heat dissipation efficiency and improving the heat dissipation effect of the motor.

[0018] 2. As a preferred embodiment, the air duct cover at least blocks the area from the outer edge of the installation port to the midpoint of the blades of the cooling fan; in order to further prevent the airflow driven by the blades, especially the airflow near the outer edge of the blades from being thrown out through the opening of the installation port, the scheme of this embodiment further expands the blocking range of the air duct cover, which can effectively prevent the hot air flow from flowing back at the installation port, so that the hot air flow can only be discharged through the preset air outlet, thereby ensuring the heat dissipation efficiency.

[0019] 3. As a preferred embodiment, the air duct cover plate includes an annular cover body and an air inlet formed in the middle of the cover body, and the cover body at least covers the area between the outer edge of the installation port and the outer edge of the fan blades of the cooling fan; in order to realize the air flow exchange in the cooling duct, the present embodiment uses the middle part of the cover body to form the air inlet on the premise that the air duct cover plate covers part of the installation port, so that when the machine is working, the cooling fan rotates to draw air (i.e., cold air flow) from the air inlet into the cooling duct, and then the hot air flow in the cooling duct can be discharged through the air outlet, so that the heat dissipation of the motor is reliable.

[0020] As a preferred embodiment of the present embodiment, the motor assembly includes a motor bracket, the motor bracket is fixed above the air duct cover, the motor is hoisted below the motor bracket, and the air duct cover is covered above the motor bracket; to achieve the installation of the motor, the motor and the cooling fan can be first extended into the cooling air duct through the installation port, and then the motor bracket and the air duct cover are fixed to complete the installation, and finally the air duct cover is installed. The operation is simple and can ensure the stability of the motor installation.

[0021] 4. As a preferred embodiment, the motor bracket includes a main body fixed to the motor and a plurality of bracket arms extending radially outward from the main body, and vents are formed between adjacent bracket arms, and the vents are directly opposite to the air inlet; under the premise of using the motor bracket to install the motor, in order to avoid the motor bracket blocking the air inlet and affecting the air intake, the motor bracket of this embodiment has an improved structure, and the bracket arms are used to form vents by utilizing the space between adjacent bracket arms, thereby avoiding the air inlet, so that external airflow can enter the heat dissipation duct through the air inlet-ventilation port, ensuring smooth air intake.

[0022] 5. As a preferred embodiment, the top outer edge of the air duct cover is provided with a cover top wall extending inward, and the cover top wall is provided with a fixing column extending upward, and the motor bracket is fixed to the fixing column and the two are isolated by a shock-absorbing pad; in order to realize the motor installation, the present embodiment adopts a simple fixing column to fix the motor bracket, and further, the fixing column provides conditions for the installation of the shock-absorbing pad, which can realize the flexible installation of the motor and avoid the vibration generated during the operation of the motor from being transmitted to the surrounding structure and aggravating the vibration noise. In addition, the shock-absorbing pad itself can absorb noise, which is conducive to reducing working noise.

[0023] Furthermore, a notch is provided on the outer edge of the air duct cover to avoid the fixed column; when the air duct cover is arranged above the fixed column, the height of the overall structural member will inevitably increase, which will be not conducive to the miniaturization of the air fryer. By providing a notch to avoid the fixed column, the installation position of the air duct cover can be lowered, which is conducive to reducing the overall height of the air fryer and achieving miniaturization.

[0024] 6. As a preferred embodiment, the motor bracket and the air duct cover are integrally formed; this embodiment can simplify the installation process, so that the motor and the air duct cover can be installed relative to the air duct cover in one step, thereby improving the installation efficiency.

[0025] 7. As a preferred embodiment, the cooling fan includes an annular main body connected to the outer rotor and a plurality of base plates extending radially outward from the annular main body, and the blades of the cooling fan are connected to the base plates and extend upward; in the scheme in which an air inlet is provided at the top of the air duct cover, in order to further improve the heat dissipation efficiency, the extension direction of the cooling fan blades is arranged toward the air inlet, which can increase the wind pressure of the suction and is beneficial to improving the heat dissipation efficiency.

[0026] 8. As a preferred embodiment, the air duct cover completely blocks the installation port, and an air inlet is provided at the bottom of the air duct cover; in order to enrich the air intake method of the heat dissipation air duct, when the air duct cover completely blocks the installation port, air can enter from the bottom of the air duct cover. At this time, the air duct cover can be set as a simple circular cover, which is conducive to the simplification of its structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] 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 on the present invention. In the drawings:

[0028] Figure 1 A partial cross-sectional schematic diagram of an air fryer according to one embodiment of the present application.

[0029] Figure 2 It is a cross-sectional schematic diagram of an air duct cover plate arranged at a mounting opening in one embodiment of the present application.

[0030] Figure 3 A schematic diagram of the composition of a motor assembly according to one embodiment of the present application.

[0031] Figure 4 An exploded schematic diagram of an air duct cover, a motor assembly and an air duct cover according to an embodiment of the present application.

[0032] Figure 5 This is a schematic diagram of the assembled motor assembly and air duct cover according to one implementation of the present application.

[0033] Reference numerals:

[0034] 10. Air duct cover; 11. Cooling fan; 12. Outer rotor; 13. Mounting port; 14. Air duct cover; 111. Fan blades; 141. Cover body; 142. Air inlet; 143. Beam; 144. Reinforcement rib; 15. Motor bracket; 151. Main body; 152. Bracket arm; 153. Ventilation port; 101. Fixing column; 154. Mounting hole; 145. Notch; 112. Annular body; 113. Base plate; 16. Reflection cover; 17. Shock-absorbing pad. DETAILED DESCRIPTION

[0035] 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.

[0036] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0037] 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 protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0038] 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" and the like indicate orientations or positional relationships based on the orientations or positional relationships 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0040] In the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. However, if it is indicated as a direct connection, it means that the two connected bodies are not connected through a transition structure, but are only connected to form a whole through a connecting structure. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0041] In the present utility model, 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 utility model. 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.

[0042] like Figures 1 to 5 As shown, the present application provides an air fryer with improved heat dissipation efficiency, comprising a cooking cavity and an installation cavity arranged above the cooking cavity, wherein a motor assembly and an air duct cover 10 forming a heat dissipation duct are arranged in the installation cavity, wherein the motor assembly comprises a motor and a heat dissipation fan 11 connected as one body, wherein the motor has an outer rotor 12, wherein the heat dissipation fan 11 is arranged on the outer peripheral wall of the outer rotor 12, wherein a mounting opening 13 is arranged on the top of the air duct cover 10, wherein the motor assembly is installed into the heat dissipation duct through the mounting opening 13, wherein an air duct cover 14 is arranged at the mounting opening 13, wherein the air duct cover 14 at least covers an area from an outer edge of the mounting opening 13 to an outer edge of a blade 111 of the heat dissipation fan 11.

[0043] Specifically, the motor of the present application is a brushless motor, the motor and the heat dissipation fan 11 are connected as one, and the motor assembly is thinned as a whole, which is conducive to reducing the axial size of the air fryer. Among them, the motor and the heat dissipation fan 11 can be connected as one by, for example, welding or heat nesting, or the heat dissipation fan 11 can be directly formed by the outer rotor 12 of the motor. The motor and the heat dissipation fan 11 are usually pre-installed, and then when they are installed with the components of the air fryer, the motor needs to be installed into the heat dissipation duct from the installation port 13 position, which requires that the opening diameter of the installation port 13 is larger than the outer diameter of the fan blade 111 of the heat dissipation fan 11. After the heat dissipation fan 11 is installed, if there is no obstruction at the installation port 13, then when the air fryer is used, when the motor dissipates heat, a part of the hot air flow will be thrown out from the edge of the fan blade 111 and flow out through the installation port 13, and this part of the hot air flow will be sucked back into the heat dissipation duct by the heat dissipation fan 11, so that part of the hot air flow reflux is formed, resulting in a decrease in the motor cooling rate, 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 111 to the outer edge of the mounting port 13. Based on this, by setting an air duct cover 14 which at least covers the area from the outer edge of the mounting port 13 to the outer edge of the fan blade 111 of the cooling fan 11, 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 the heat dissipation effect of the motor.

[0044] During the heat dissipation process of the motor, the external airflow (cold airflow) flows into the heat dissipation duct through the air inlet 142, and the airflow (hot airflow) after absorbing heat is discharged from the heat dissipation duct from the air outlet to complete the heat dissipation. It can be understood that the heat dissipation fan 11 can, for example, suck air axially and discharge air laterally. Based on this, the air inlet 142 can be set at the top or bottom of the air duct cover 10, and the air outlet can be set on the side of the air duct cover 10 to optimize the heat dissipation path. The air duct cover 14 can either block part of the opening of the installation port 13 or completely block the entire opening of the installation port 13, and can be set according to actual needs.

[0045] When the top of the duct cover 10 is used for air intake, the duct cover plate 14 does not completely cover the installation opening 13, and the duct cover plate 14 preferentially covers the peripheral area of ​​the installation opening 13, and the central area can be reserved for air intake. By reasonably setting the diameter of the air inlet 142, it is possible to avoid the air inlet 142 being too small to affect the air intake volume and thus the heat dissipation efficiency, or the air inlet 142 being too large to cause air flow backflow to affect the heat dissipation efficiency, thereby improving the air intake effect.

[0046] As a preferred embodiment of the present application, the air duct cover plate 14 at least covers the area between the outer edge of the mounting opening 13 and the midpoint of the blade 111 of the cooling fan 11. Figure 2As shown, in order to further prevent the airflow driven by the fan blades 111, especially the airflow near the outer edge of the fan blades 111 from being thrown out through the opening of the mounting port 13, the scheme of this embodiment further expands the shielding range of the air duct cover 14, which can effectively prevent the hot air flow from flowing back and forth at the opening of the mounting port 13, so that the hot air flow can only be discharged through the preset air outlet, thereby ensuring the heat dissipation efficiency.

[0047] When the top of the air duct cover 10 is used for air intake, the structure of the air duct cover plate 14 can be used to form an air inlet 142. As a preferred embodiment of the present application, the air duct cover plate 14 includes an annular cover body 141 and an air inlet 142 formed in the middle of the cover body 141, and the cover body 141 at least covers the area between the outer edge of the installation opening 13 and the outer edge of the fan blade 111 of the heat dissipation fan 11.

[0048] Specifically, the middle of the cover 141 may be completely open to form the air inlet 142, or a hollow bracket may be provided in the middle of the cover 141 to form the air inlet 142 in the hollow portion, which is not specifically limited in the present application. Figure 4 As shown, a hollow bracket connected to the cover body 141 is provided in the middle of the cover body 141, and the hollow bracket includes a plurality of beams 143 arranged at intervals along the circumferential direction, and an air inlet 142 is formed between adjacent beams 143. Further, in order to strengthen the structural strength of the air duct cover plate 14, a reinforcing rib 144 connecting the plurality of beams 143 is provided in the middle of the hollow bracket, so that the probability of deformation of the air duct cover plate 14 or fracture of the beams 143 can be reduced, thereby extending its service life.

[0049] The outer circle of the annular cover 141 at least corresponds to the radial position of the outer edge of the installation opening 13, and the inner circle at least corresponds to the radial position of the outer edge of the blade 111 of the cooling fan 11 to prevent the hot air flow from flowing back, thereby ensuring the cooling efficiency.

[0050] In one embodiment, the motor assembly includes a motor bracket 15 , the motor bracket 15 is fixed above the air duct cover 10 , the motor is hoisted below the motor bracket 15 , and the air duct cover plate 14 is covered above the motor bracket 15 .

[0051] like Figure 4 and Figure 5 As shown, to achieve the installation of the motor, the motor and the cooling fan 11 can be first installed into the cooling duct through the installation opening 13, and then the motor bracket 15 and the duct cover 10 are fixed to complete the installation, and finally the duct cover 14 is installed. The operation is simple and can ensure the stability of the motor installation.

[0052] Furthermore, in order to prevent the motor bracket 15 from blocking the air inlet 142 and affecting the air intake, as Figure 3 and Figure 5As shown, the motor bracket 15 includes a main body 151 fixed to the motor and a plurality of bracket arms 152 extending radially outward from the main body 151, and a vent 153 is formed between adjacent bracket arms 152, and the vent 153 is directly opposite to the air inlet 142. That is, the bracket arms 152 can be used to form the vent 153 using the space between adjacent bracket arms 152, thereby avoiding the air inlet 142, so that the external airflow can enter the heat dissipation duct through the air inlet 142-vent 153, ensuring smooth air intake.

[0053] Furthermore, in order to achieve the installation of the motor bracket 15 and the air duct cover 10, the top outer edge of the air duct cover 10 is provided with a cover top wall extending inward, and the cover top wall is provided with an upward extending fixing column 101, and the motor bracket 15 is fixed to the fixing column 101 and the two are isolated by a shock-absorbing pad 17.

[0054] like Figure 3 and Figure 4 As shown, the outer end of the bracket arm 152 of the motor bracket 15 is provided with a mounting hole 154, and the shock-absorbing pad 17 is provided between the mounting hole 154 and the fixing column 101. By providing the shock-absorbing pad 17, the flexible installation of the motor bracket 15 can be achieved, and the motor bracket 15 has a floating property, which can avoid the resonance between the structural parts caused by the vibration of the motor and increase the noise, and the shock-absorbing pad 17 itself absorbs the noise, which can effectively reduce the working noise. The shock-absorbing pad 17 is, for example, a butyl rubber shock-absorbing pad 17, which can improve the shock absorption effect.

[0055] Generally, when installing the air duct cover 14, the lower surface of the air duct cover 14 should be located above the upper surface of the fixing column 101 (or the two are in contact), which will result in a large overall height of the air duct cover 10 plus the air duct cover 14, which is not conducive to the miniaturization of the air fryer. To solve this problem, in one embodiment, the outer edge of the air duct cover 14 is provided with a notch 145 to avoid the fixing column 101. Figure 4 and Figure 5 As shown, by setting a notch 145 that avoids the fixing column 101, the installation position of the air duct cover plate 14 can be lowered, which is conducive to reducing the overall height of the air fryer and achieving miniaturization. Specifically, based on the effect of the notch 145, the upper surface of the air duct cover plate 14 can be made not higher than the upper surface of the fixing column 101.

[0056] Regarding the above-mentioned motor bracket 15 and air duct cover 14, both can be a separate structure or an integrated structure, and this application does not make any specific limitation.

[0057] In one embodiment, the motor bracket 15 and the air duct cover plate 14 are integrally formed. In this embodiment, the installation process is to directly cover the air duct cover plate 14 on the top of the air duct cover 10 for fixing, which can save installation steps and improve efficiency.

[0058] In the scheme where the air inlet 142 is provided at the top of the air duct cover 10, in order to further improve the heat dissipation efficiency, the structure of the fan blades 111 can be optimized. By setting the extension direction of the fan blades 111 toward the air inlet 142, the wind pressure of the suction air can be increased, which is beneficial to improving the heat dissipation efficiency.

[0059] Preferably, the heat dissipation fan 11 comprises an annular body 112 connected to the outer rotor 12 and a plurality of base plates 113 extending radially outward from the annular body 112, and the blades 111 of the heat dissipation fan 11 are connected to the base plates 113 and extend upward. Figure 3 As shown, the fan blades 111 extend upward, which is not only beneficial to increase the wind pressure of the suction, but also can avoid blowing the hot air flow downward, causing the hot air flow to have to flow a longer path before being discharged through the air outlet, thus also facilitating smooth exhaust.

[0060] In the above solution, the air duct cover 14 can partially cover the installation opening 13 to form an air inlet 142 at the top of the air duct cover 10. In other embodiments, the air duct cover 14 can also completely cover the installation opening 13. In this case, the air inlet 142 can be set at the bottom of the air duct cover 10 to meet the air intake demand, which also does not affect the heat dissipation effect. In order to make the air duct cover 14 completely cover the installation opening 13, the air duct cover 14 can be a circular cover with a diameter not less than the diameter of the installation opening 13. The structure is simple, which can simplify the structural configuration and reduce costs.

[0061] The air fryer of the present application is provided with a reflective cover 16, which can separate the installation cavity and the cooking cavity. In some embodiments, the duct cover 10 is fixed above the reflective cover 16, and the duct cover 10 and the reflective cover 16 are enclosed to form a heat dissipation duct. Furthermore, a mounting opening 13 is provided on the top of the duct cover 10, so that the motor and the heat dissipation fan 11 can be installed into the duct cover 10 through the mounting opening 13, and finally the duct cover plate 14 is installed to improve the heat dissipation effect of the motor. In the above scheme, when the motor is working, the top of the duct cover 10 is used for air intake, and the duct cover plate 14 does not completely cover the mounting opening 13.

[0062] In other embodiments, when air is entering from the bottom of the air duct cover 10, the air duct cover 14 completely blocks the mounting opening 13, and a certain gap is provided between the bottom of the air duct cover 10 and the reflective cover 16 to meet the air entry requirement.

[0063] The technical solution protected by the present utility model is not limited to the above-mentioned embodiments. It should be pointed out that the combination of the technical solution of any embodiment with the technical solution of one or more other embodiments is within the protection scope of the present utility model. Although the present utility model has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to it based on the present utility model. Therefore, these modifications or improvements made without departing from the spirit of the present utility model are within the scope of protection claimed by the present utility model.

Claims

1. An air fryer with improved heat dissipation efficiency, comprising a cooking cavity and an installation cavity arranged above the cooking cavity, wherein a motor assembly and an air duct cover forming a heat dissipation air duct are arranged in the installation cavity, characterized in that: The motor assembly includes a motor and a cooling fan connected as one body, the motor having an outer rotor, the cooling fan being arranged on the outer peripheral wall of the outer rotor, the top of the air duct cover being provided with a mounting opening, the motor assembly being installed into the cooling air duct through the mounting opening, an air duct cover being provided at the mounting opening, the air duct cover at least covering the area from the outer edge of the mounting opening to the outer edge of the blades of the cooling fan.

2. The air fryer with improved heat dissipation efficiency according to claim 1, characterized in that: The air duct cover at least covers the area between the outer edge of the mounting opening and the midpoint of the blades of the heat dissipation fan.

3. The air fryer with improved heat dissipation efficiency according to claim 1, characterized in that: The air duct cover plate includes an annular cover body and an air inlet formed in the middle of the cover body, and the cover body at least covers the area between the outer edge of the installation opening and the outer edge of the blade of the heat dissipation fan.

4. The air fryer with improved heat dissipation efficiency according to claim 3, characterized in that: The motor assembly comprises a motor bracket, the motor bracket is fixed above the air duct cover, the motor is hoisted below the motor bracket, and the air duct cover plate is arranged above the motor bracket.

5. The air fryer with improved heat dissipation efficiency according to claim 4, characterized in that: The motor bracket includes a main body portion fixed to the motor and a plurality of bracket arms extending radially outward from the main body portion, and vents are formed between adjacent bracket arms, and the vents are directly opposite to the air inlet.

6. The air fryer with improved heat dissipation efficiency according to claim 4, characterized in that: The top outer edge of the air duct cover is provided with a cover top wall extending inwardly, and the cover top wall is provided with a fixing column extending upwardly, and the motor bracket is fixed to the fixing column and the two are isolated by a shock-absorbing pad.

7. The air fryer with improved heat dissipation efficiency according to claim 6, characterized in that: The outer edge of the air duct cover is provided with a notch to avoid the fixing column.

8. The air fryer with improved heat dissipation efficiency according to claim 4, characterized in that: The motor bracket and the air duct cover are integrally formed.

9. An air fryer with improved heat dissipation efficiency according to any one of claims 3 to 8, characterized in that: The heat dissipation fan comprises an annular body connected to the outer rotor and a plurality of base plates extending radially outward from the annular body. The fan blades of the heat dissipation fan are connected to the base plates and extend upward.

10. The air fryer with improved heat dissipation efficiency according to claim 1, characterized in that: The air duct cover completely covers the installation opening, and an air inlet is arranged at the bottom of the air duct cover.

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