Hot air assembly and cooking appliance

Abstract

A hot air assembly (100), comprising a cover body (10), a heating tube (20), and a fan (30). The cover body (10) is provided with an air duct (11) extending in a first direction, and the first direction is parallel to the cover body (10); the heating tube (20) is provided at an air outlet (110) in the air duct (11); the fan (30) is provided in the air duct (11), and the fan (30) is used for driving an airflow to flow so that the airflow flows out from the air duct (11) in a direction away from the cover body (10) after passing through the heating tube (20); and the height of the hot air assembly (100) is less than or equal to 30 mm. Also disclosed in the present application is a cooking appliance (1000).

Description

Hot air components and cooking appliances

[0001] Priority information

[0002] This application claims priority and benefits to patent application No. 202422488093.9, filed with the China National Intellectual Property Administration on October 14, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of household appliance technology, and in particular to a hot air assembly and a cooking appliance. Background Technology

[0004] A hot air cooker generates hot air through heating elements in its hot air assembly. A motor in the assembly then drives a fan to blow this hot air onto the heating elements, directing it into the cooker to heat the food. This high-temperature air circulates within a closed space, utilizing the food's own oils to fry the food, dehydrating it and resulting in a golden-brown, crispy surface – achieving the desired frying effect. In related technologies, the hot air assembly is located on the top plate of the hot air cooker. To avoid interfering with the fan, the top plate requires downward clearance, which occupies space within the cooker's internal cavity. Summary of the Invention

[0005] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application provides a hot air assembly.

[0006] The hot air assembly of this application includes a cover, a heating element, and a fan. The cover forms an air duct extending along a first direction, which is parallel to the cover. The heating element is disposed at an air outlet within the air duct. The fan is disposed within the air duct and drives airflow so that the airflow flows from the air duct through the heating element and exits in a direction away from the cover. The height of the hot air assembly is less than or equal to 30 mm.

[0007] In some embodiments, the air duct includes a bottom wall and side walls that together form the air duct, and the bottom wall has a boss that the fan is mounted on.

[0008] In some embodiments, the bottom wall is inclined away from the heating element.

[0009] In some embodiments, the hot air assembly further includes a heat insulation plate and heat insulation cotton. The heat insulation plate is connected to the cover and is located on the side of the cover away from the heating element; the heat insulation cotton is disposed between the heat insulation plate and the cover.

[0010] In some embodiments, the heat insulation plate is provided with a bracket, and the heating element extends out of the air duct and is mounted on the heat insulation plate through the bracket.

[0011] In some embodiments, the hot air assembly further includes a motor and a connecting shaft. The motor is located on the side of the heat insulation plate opposite to the cover; the connecting shaft connects the motor and the fan.

[0012] In some embodiments, the heat insulation plate is formed with a groove, the motor is disposed in the groove, the boss is formed with a clearance groove, and the groove is embedded in the clearance groove.

[0013] In some embodiments, the height of the motor is less than or equal to 30 millimeters.

[0014] In some embodiments, the air duct is U-shaped.

[0015] This application also provides a cooking appliance, which includes a cooking cavity with a plurality of first through holes and a plurality of second through holes; a hot air assembly is located on the cooking cavity, and an air duct connects the first through holes and the second through holes. The first through holes are correspondingly arranged with the fan, and the second through holes are correspondingly arranged with the heating element; the fan is used to drive the airflow in the cooking cavity to enter the air duct from the first through holes and then flow through the heating element and into the cooking cavity through the second through holes.

[0016] In some embodiments, the diameters of the first through hole and the second through hole range from 3 to 6 millimeters.

[0017] In some embodiments, the cooking appliance further includes a support plate, which is rotatably disposed within the cooking cavity.

[0018] In some embodiments, the hot air assembly is located at the top of the cooking cavity.

[0019] In some embodiments, the cooking appliance further includes an outer cover that covers the cooking cavity.

[0020] In this way, there is no need to leave a gap between the heating element and the cover, resulting in a more compact structure and a smaller overall volume of the hot air assembly. The air duct formed by the cover protrudes upwards, and the fan is located inside the air duct, reducing the downward volume occupied by the cover and fan, thus leaving more space in the hot air pot for placing, loading, and heating food.

[0021] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0022] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein:

[0023] Figure 1 is a schematic diagram of the structure of the hot air assembly according to an embodiment of this application;

[0024] Figure 2 is a schematic diagram of the external structure of the cooking appliance according to an embodiment of this application;

[0025] Figure 3 is an exploded structural diagram of the cooking appliance according to an embodiment of this application;

[0026] Figure 4 is a schematic diagram of the internal structure of the cooking appliance according to an embodiment of this application.

[0027] Main components are indicated by the following reference numerals: cooking appliance 1000, hot air assembly 100, cover 10, air duct 11, air outlet 110, bottom wall 111, boss 1111, side wall 112, heating element 20, fan 30, heat insulation plate 40, groove 41, heat insulation cotton 50, bracket 60, motor 70, cooking cavity 200, first through hole 210, second through hole 220, support plate 300, outer cover 400. Detailed Implementation

[0028] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0029] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. 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 indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0031] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0033] In the design of a convection pan, the hot air assembly, especially the combination of the heating element and the fan, is key to achieving efficient heating and frying effects. In this design, the heating element is ring-shaped, and the fan is positioned inside the ring. The ring-shaped heating element surrounds the fan, and both the heating element and the fan are installed below the pan's housing, ensuring that the entire heating element participates in heat exchange, thus improving efficiency. However, this design also presents some challenges. For example, sufficient clearance must be maintained between the heating element and the housing to prevent direct contact and heat loss, and the heating element may encroach on the fan's installation space. Overall, the hot air assembly's structural design is not compact enough. When the hot air assembly is placed on the top plate of the pan, the top plate needs to provide sufficient clearance for the fan, which takes up valuable cooking space within the pan.

[0034] In view of this, referring to Figure 1, this application provides a hot air assembly 100, which includes a cover 10, a heating element 20, and a fan 30. The cover 10 has an air duct 11 extending along a first direction, which is parallel to the cover 10. The heating element 20 is disposed at an air outlet 110 within the air duct 11. The fan 30 is disposed within the air duct 11 and is used to drive airflow so that the airflow flows from the air duct 11 through the heating element 20 and outwards in a direction away from the cover 10. The height of the hot air assembly 100 is less than or equal to 30 mm.

[0035] In this embodiment of the hot air assembly 100, the heating element 20 is a straight column that passes through both sides of the cover 10 and is located at the outlet of the air duct 11 formed by the cover 10. Compared to the annular heating element 20, which is located below the cover 10 and surrounds the fan 30, there is no need to leave a gap between the heating element 20 and the cover 10, resulting in a more compact structure, reducing the overall volume of the hot air assembly 100, and also preventing the heating element 20 from occupying too much of the installation space of the fan 30. The air duct 11 formed by the cover 10 protrudes upward, and the fan 30 is located inside the air duct 11, reducing the downward volume occupied by the cover 10 and the fan 30, thereby leaving more space for the hot air pot to handle and heat food.

[0036] Specifically, the hot air assembly 100 can be applied to cooking appliances 1000 such as hot air cookers, air fryers, and steam ovens. In other words, the cooking appliance 1000 may include the hot air assembly 100, which is used to generate and deliver hot air to achieve functions such as heating, cooking, or drying food.

[0037] The hot air assembly 100 includes a housing 10, a heating element 20, and a fan 30. The housing 10 primarily protects the internal components, guides the flow of hot air, and provides safety isolation. The heating element 20 is a key component in the hot air assembly 100 for generating heat. The heating element 20 can be made of heating wire or an electrothermal alloy, and it heats up rapidly when energized, heating the surrounding air to the desired temperature. The fan 30 is responsible for blowing the hot air out of the hot air assembly 100. The fan blades of the fan 30 rotate to generate airflow. After the heating element 20 heats the surrounding air, the fan 30 blows this hot air out of the housing 10, forming hot air that is then delivered to the cooking area of ​​the hot air pot.

[0038] Furthermore, the enclosure 10 has an air duct 11 extending along a first direction, which is parallel to the enclosure 10. The air duct 11 refers to the channel within the enclosure 10 used to guide the flow of hot air. The design of the air duct 11 determines the direction, velocity, and uniformity of the hot air flow. The first direction is parallel to the enclosure 10, pointing towards and perpendicular to the heating element 20. The design of the air duct 11, parallel to the enclosure 10, helps to achieve a uniform distribution of hot air.

[0039] The heating element 20 is located at the air outlet 110 within the air duct 11. When current passes through the heating element 20, the heat generated by the heating element 20 directly heats the air flowing through the air outlet 110. This design helps to quickly increase the temperature of the hot air, ensuring that the hot air reaches the required heating effect when it leaves the hot air assembly 100. With the heating element 20 directly facing the air outlet 110, compared to placing the heating element 20 in the middle of the air duct 11 or elsewhere, heat can be transferred to the air more effectively, reducing heat loss during the transfer process. Furthermore, by precisely controlling the position and power of the heating element 20, it is possible to ensure that the hot air has a uniform temperature and flow rate when leaving the air duct 11, thereby improving the cooking or drying effect.

[0040] A fan 30 is located inside the air duct 11 and fixedly connected to the cover 10. The fan 30 drives the airflow so that the airflow flows from the air duct 11 through the heating element 20 and outwards away from the cover 10. When the fan 30 is turned on, it draws in air below the fan 30 into the air duct 11. The air is then guided through the air duct 11 of the cover 10 and flows towards the heating element 20. When the airflow passes through the heating element 20, the heat generated by the heating element 20 is transferred to the airflow, raising its temperature. During the heat transfer process, the fan speed needs to be controlled to ensure sufficient contact time between the airflow and the heating element 20, and the heating power of the heating element needs to be controlled in coordination with the fan 30 to achieve efficient heat exchange. Too high a speed will result in insufficient heating of the airflow, while too low a speed will result in slow hot air output and excessively long heating time for the food. After the airflow has exchanged heat with the heating element 20, the heated airflow continues to flow under the drive of the fan 30 and is finally discharged from the air outlet 110 of the air duct 11 away from the cover 10. In this way, hot air is delivered for cooking, drying, or other applications requiring heating. Furthermore, the temperature and flow rate of the hot air can be flexibly controlled by adjusting the speed of the fan 30 and the power of the heating element 20 to meet different cooking or drying needs.

[0041] In the design of the relevant hot air assembly, on the one hand, to avoid interference with the fan blades, a downward protrusion needs to be added to the top plate, which occupies cavity volume and is not conducive to food handling. On the other hand, to avoid interference with the motor, the top cover needs to be pressed upward, affecting the appearance and user storage space. Due to the above factors, the height of the relevant hot air assembly is about 53 mm.

[0042] In the hot air assembly 100 of this application, the air duct 11 formed by the cover 10 protrudes upward, and the fan 30 is disposed within the air duct 11, reducing the downward volume occupied by the cover 10 and the fan 30, thereby leaving more space for the hot air pot to handle and heat food. The height of the hot air assembly 100 is less than or equal to 30 mm, for example, it can be 26 mm, 26.5 mm, 27 mm, 27.5 mm, 28 mm, 28.5 mm, 29 mm, 29.5 mm or 30 mm.

[0043] Please refer to Figure 1. In some embodiments, the air duct 11 includes a bottom wall 111 and a side wall 112. The bottom wall 111 and the side wall 112 together form the air duct 11. The bottom wall 111 has a boss 1111, and the fan 30 is mounted on the boss 1111.

[0044] Specifically, the air duct 11 is enclosed by a bottom wall 111 and side walls 112, forming a semi-enclosed space to accommodate components such as the fan 30 and the heating element 20. The bottom wall 111 serves as the foundation of the air duct 11, supporting the entire structure and providing a platform for mounting other components such as the fan 30 and the heating element 20. The boss 1111 formed on the bottom wall 111 is an upward extension of the bottom wall 111, and its shape and size are determined according to the size of the fan 30 and the installation requirements. The main function of the boss 1111 is to provide a stable mounting platform, allowing the fan 30 to be securely fixed inside the air duct 11 and reducing noise and wear caused by vibration or airflow impact.

[0045] The fan 30 is mounted on the boss 1111, ensuring that the axis of the fan 30 is aligned with the centerline of the air duct 11, thereby ensuring uniform airflow distribution and flow. The air outlet of the fan 30 is connected to the air inlet section of the air duct 11 to achieve smooth airflow. The fan 30 can be secured to the boss 1111 using bolts, screws, or other fasteners. These fasteners pass through the mounting holes of the fan 30 and are tightened into the threaded holes of the boss 1111, thus firmly locking the fan 30 in the desired position. Additionally, washers, gaskets, and other components may be needed to ensure a tight seal and stability between the fan 30 and the boss 1111.

[0046] Thus, the bottom wall 111 and the boss 1111 in the air duct 11 together provide a stable and reliable mounting platform for the fan 30, ensuring that the fan 30 can work normally and generate the required airflow. This design not only improves the heating efficiency of the hot air assembly 100, but also reduces the impact of adverse factors such as noise and wear.

[0047] Please refer to Figure 1. In some embodiments, the bottom wall 111 is inclined away from the heating tube 20.

[0048] Specifically, the inclined bottom wall 111 helps guide the flow direction of airflow within the duct 11. Due to gravity, the inclined bottom wall 111 causes the airflow to have a certain downward component during the flow process, which helps to better guide the airflow to the heating tube 20, thereby improving heat exchange efficiency.

[0049] In addition, the hot air assembly 100 may produce condensate or other liquids during use. The sloping bottom wall 111 design helps these liquids to drain smoothly from the air duct 11, reducing water accumulation and cleaning difficulty.

[0050] By moving the bottom wall 111 away from the heating element 20, the contact area between the bottom wall 111 and the surrounding area is reduced to a certain extent, which can reduce the heat loss of airflow through the bottom wall 111 and improve the overall heating efficiency of the hot air assembly 100.

[0051] The choice of tilt angle is also an important consideration in the design process. An excessively large tilt angle may lead to poor airflow or create eddies, while an excessively small tilt angle may not be able to fully utilize its function of guiding airflow and reducing heat loss. Therefore, in practical designs, it is necessary to optimize the selection based on specific requirements and experimental data.

[0052] Referring to Figure 1, in some embodiments, the hot air assembly 100 further includes a heat insulation plate 40 and heat insulation cotton 50. The heat insulation plate 40 is connected to the cover 10 and is located on the side of the cover 10 away from the heating tube 20; the heat insulation cotton 50 is disposed between the heat insulation plate 40 and the cover 10.

[0053] Specifically, the heat insulation plate 40 is connected to the cover 10 and located on the side of the cover 10 away from the heating tube 20. It effectively blocks heat from the heating tube 20, reducing heat loss to non-target areas and improving heating efficiency. Furthermore, it protects the environment and equipment surrounding the hot air assembly 100 from high temperatures, reducing the risk of fires and other safety accidents, extending the service life of surrounding equipment and structures, and preventing burns when people come into contact with the outer surface of the hot air boiler. The main function of the heat insulation plate 40 is to provide a thermal barrier, separating high-temperature areas from low-temperature areas. The heat insulation plate 40 is typically made of high-temperature resistant materials with low thermal conductivity, such as ceramic fiber or asbestos, to ensure stability and insulation performance even in high-temperature environments.

[0054] Insulation cotton 50 is placed between the insulation board 40 and the cover 10 as a further insulation layer. It fills the gap between the insulation board 40 and the cover 10, reducing air convection and radiative heat transfer, and further improving the insulation performance. Insulation cotton 50 can be made of soft, fluffy, and high-temperature resistant materials, such as fiberglass or aluminum silicate fiber. These materials have good insulation performance and a certain compressive strength, and can maintain a stable insulation effect in high-temperature environments.

[0055] Please refer to Figure 1. In some embodiments, the heat insulation plate 40 is provided with a bracket 60, and the heating tube 20 extends out of the air duct 11 and is installed on the heat insulation plate 40 through the bracket 60.

[0056] Specifically, the main purpose of designing the heating element 20 to extend outside the air duct 11 is to better facilitate heat dissipation and temperature control. The internal space of the air duct 11 is limited, and it is necessary to maintain a certain airflow and temperature distribution. Therefore, placing the heating element 20 outside the air duct 11 can avoid direct interference of the heating element 20 with the airflow inside the air duct 11, and at the same time, it is also conducive to the dissipation of heat from the heating element 20.

[0057] Mounting the heating element 20 onto the insulation plate 40 via the bracket 60 further enhances the heat insulation effect. The insulation plate 40 effectively prevents the heat from the heating element 20 from being transferred to the surrounding environment, ensuring that the heat is mainly concentrated in the area that needs to be heated. At the same time, the insulation plate 40 also provides a stable mounting platform for the heating element 20, helping to maintain stable operation of the heating element 20.

[0058] The bracket 60 plays a crucial supporting and fixing role in the installation of the heating element 20. The bracket 60 must be able to withstand the heat and mechanical stress generated by the heating element 20 during operation, ensuring that the heating element 20 is stably fixed to the heat insulation plate 40 without loosening or falling off. The design of the bracket 60 also needs to consider heat dissipation factors; by increasing the heat dissipation area or using materials with good thermal conductivity, it helps the heating element 20 dissipate heat better, improving the heating efficiency of the hot air assembly 100.

[0059] Referring to Figure 1, in some embodiments, the hot air assembly 100 further includes a motor 70 and a connecting shaft. The motor 70 is located on the side of the heat insulation plate 40 away from the cover 10; the connecting shaft connects the motor 70 and the fan 30.

[0060] Specifically, the motor 70 is located on the side of the heat insulation plate 40 away from the cover 10. This not only helps the motor 70 dissipate heat and prevents it from being damaged due to overheating, but also reduces the impact of the motor 70 on the internal space of the cover 10, making the structure of the entire hot air assembly 100 more compact.

[0061] The motor 70 serves as the power source for the fan 30, generating power through rotation to drive the connecting shaft and the fan 30 to rotate together. The performance of the motor 70 directly affects the speed and airflow of the fan 30, thereby affecting the heating effect and air delivery capacity of the hot air assembly 100.

[0062] The connecting shaft is responsible for transmitting power from the motor 70 to the fan 30. One end of the connecting shaft is connected to the output shaft of the motor 70, and the other end is connected to the shaft of the fan 30, ensuring that the rotation of the motor 70 can be accurately transmitted to the fan 30 to drive its rotation. The connecting shaft is usually made of high-strength, wear-resistant materials to ensure that it can withstand the requirements of high-speed rotation and transmission of large torque.

[0063] The coordinated operation of the motor 70 and the connecting shaft ensures that the fan 30 can operate stably and efficiently. The power of the motor 70 is accurately transmitted to the fan 30 through the connecting shaft, driving it to rotate and generate airflow to achieve the function of air delivery.

[0064] Please refer to Figure 1. In some embodiments, the heat insulation plate 40 is formed with a groove 41, the motor 70 is disposed in the groove 41, the boss 1111 is formed with a clearance groove, and the groove 41 is embedded in the clearance groove.

[0065] Specifically, by embedding the motor 70 into the groove 41 of the heat insulation plate 40 and then cooperating with the clearance groove on the protrusion 1111 of the bottom wall 111 of the air duct 11, the structure of the entire hot air assembly 100 becomes more compact. This design not only reduces the space occupied between the motor 70 and the air duct 11, but also makes the layout of the hot air assembly 100 more reasonable, which is conducive to miniaturization and weight reduction.

[0066] Furthermore, the embedded design of the groove 41 and the clearance slot increases the stability of the motor 70 installation. The motor 70 is positioned within the groove 41 and firmly fixed to the heat insulation plate 40, reducing the risk of loosening or detachment due to vibration or external forces. The embedded design reduces direct contact and vibration transmission between the motor 70 and surrounding structures, thus reducing vibration and noise during motor operation.

[0067] In some implementations, the height of the motor 70 is less than or equal to 30 millimeters.

[0068] Specifically, the height of the motor 70 can be 21 mm, 22 mm, 23 mm, 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 29 mm, or 30 mm. Motors 70 with a height of 30 mm or less typically fall into the category of small-size brushed motors 70, characterized by their small size, light weight, and low cost. These motors 70 are suitable for applications with limited space and low cost requirements, such as micro-appliances, instruments, and smart home devices.

[0069] Please refer to Figure 1. In some embodiments, the air duct 11 is U-shaped.

[0070] Specifically, the U-shaped air duct 11 consists of a main channel and two branches, forming a closed-loop or open ventilation path. This design allows for flexible arrangement of the air duct 11 within a limited space while maintaining smooth airflow. The U-shaped air duct 11 is compact and occupies little space, making it suitable for use in space-constrained equipment such as hot air boilers. This design maximizes the use of internal space, improving overall efficiency and utilization. All connections and branches of the U-shaped air duct 11 are well-sealed, helping to reduce heat loss and prevent the intrusion of external impurities.

[0071] Please refer to Figures 2 and 3. This application also provides a cooking appliance 1000, which includes a cooking cavity 200. The cooking cavity 200 is provided with a plurality of first through holes 210 and a plurality of second through holes 220. A hot air assembly 100 is located on the cooking cavity 200. An air duct 11 connects the first through holes 210 and the second through holes 220. The first through holes 210 are correspondingly arranged with a fan 30, and the second through holes 220 are correspondingly arranged with a heating element 20. The fan 30 is used to drive the airflow in the cooking cavity 200 to enter the air duct 11 from the first through holes 210 and flow through the heating element 20 to the cooking cavity 200 through the second through holes 220.

[0072] Specifically, the cooking appliance 1000 can be, for example, a convection pan, which can be used to cook food such as frying and baking. The cooking cavity 200 is the space inside the convection pan used to hold the food and cook it. The cooking cavity 200 can be made of high-temperature resistant and corrosion-resistant materials, such as stainless steel or special alloys. The shape and size of the cooking cavity 200 are determined according to the overall design and usage requirements of the cooking appliance 1000, and can be round, square, or irregular in shape.

[0073] The cooking cavity 200 is provided with multiple first through holes 210 and second through holes 220, which are used to achieve air circulation. The first through holes 210 are corresponding to the fan 30 and serve as airflow inlets; the second through holes 220 are corresponding to the heating element 20 and serve as airflow outlets. When the fan 30 is working, it generates suction or thrust, drawing the cold air in the cooking cavity 200 into the air duct 11 through the first through holes 210, pushing it through the heating element 20 for heating, and then re-entering the cooking cavity 200 through the second through holes 220, forming a circulation.

[0074] Because the hot air circulates within the cooking cavity 200, it ensures that the food is heated evenly. No matter where the food is placed in the cooking cavity 200, it will receive the same temperature and volume of hot air, thus avoiding the problem of uneven cooking caused by uneven heat in traditional cooking methods.

[0075] Please refer to Figure 3. In some embodiments, the diameters of the first through hole 210 and the second through hole 220 range from 3 to 6 millimeters.

[0076] Specifically, the diameters of the first through-hole 210 and the second through-hole 220 range from 3 to 6 millimeters, and their lengths can be, for example, 3 millimeters, 3.5 millimeters, 4 millimeters, 4.5 millimeters, 5 millimeters, 5.5 millimeters, or 6 millimeters. Through-holes with diameters in the range of 3 to 6 millimeters ensure efficient airflow within the cooking cavity 200. Through-holes that are too small may increase airflow resistance and reduce circulation speed; while through-holes that are too large may cause heat loss to be too rapid, affecting cooking results.

[0077] An appropriate orifice diameter helps achieve even air distribution and heating within the cooking cavity 200. This range ensures a stable circulation of hot air within the cooking cavity 200, resulting in even heating of the food. Larger diameter orifices are less prone to clogging by food residue or grease, facilitating cleaning and maintenance. This range also helps reduce problems caused by poor airflow due to blockages.

[0078] In summary, the diameter range of 3-6 mm for the first through hole 210 and the second through hole 220 in the cooking appliance 1000 is based on considerations of factors such as air circulation efficiency, uniform heating, and prevention of clogging. This design helps improve cooking results and ensures safe use.

[0079] Please refer to Figure 4. In some embodiments, the cooking appliance 1000 also includes a support plate 300, which is rotatably disposed within the cooking cavity 200.

[0080] Specifically, the support plate 300, as a key component in the cooking process, primarily serves to support the food. The support plate 300 is connected to the cooking cavity 200 via a specific mechanism (such as bearings and a transmission device), enabling it to rotate. Because the support plate 300 is rotatable, it can continuously change the position and angle of the food during cooking, thereby promoting air circulation within the cooking cavity 200. This helps the food to be heated more evenly, improving the cooking effect.

[0081] The cooking tray 300 is typically made of high-temperature resistant, corrosion-resistant, and easy-to-clean materials, such as stainless steel and special alloys. These materials ensure that the cooking tray 300 will not deform or release harmful substances during cooking, and is easy to clean and maintain.

[0082] In some embodiments, the hot air assembly 100 is located at the top of the cooking cavity 200.

[0083] Specifically, the hot air assembly 100 is located at the top of the cooking cavity 200, allowing hot air to be blown directly onto the food, reducing heat loss during transmission. This design helps achieve rapid and even heating, improving cooking efficiency.

[0084] Furthermore, placing the hot air assembly 100 at the top of the cooking cavity 200 simplifies cleaning. Oil fumes and food residue generated during cooking tend to accumulate on the bottom and sides of the cooking cavity 200, while the top design reduces contamination of the hot air assembly 100, making it easier for users to clean and maintain.

[0085] In some embodiments, the cooking appliance 1000 also includes an outer cover 400 that covers the cooking cavity 200.

[0086] Specifically, the outer cover 400 serves as an external protective layer for the cooking cavity 200. The outer cover 400 and the cooking cavity 200 have a good seal to prevent leakage of oil fumes, water vapor, and food residue, which helps maintain a clean and hygienic kitchen environment. When the cooking appliance 1000 is in operation, the cooking cavity 200 and its internal components may reach high temperatures. The outer cover 400 prevents users from directly contacting these high-temperature parts, thus avoiding burns and other accidents. Furthermore, the outer cover 400 can also reduce the diffusion of noise and heat generated during cooking to the outside, improving the overall safety of the cooking appliance 1000.

[0087] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with the described embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0088] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A hot air assembly, wherein, The hot air assembly includes: A cover having an air duct extending along a first direction, the first direction being parallel to the cover; The heating element is located at the air outlet inside the air duct; A fan is disposed within the air duct, and the fan is used to drive the airflow so that the airflow flows from the air duct through the heating tube and out in a direction away from the cover. The height of the hot air assembly is less than or equal to 30 mm.

2. The hot air assembly of claim 1, wherein, The air duct includes a bottom wall and a side wall, which together form the air duct. The bottom wall has a boss, and the fan is mounted on the boss.

3. The hot air assembly of claim 2, wherein, The bottom wall is inclined away from the heating element.

4. The hot air assembly of claim 2, wherein, The hot air assembly also includes: A heat insulation plate, connected to the cover, is located on the side of the cover away from the heating element; Thermal insulation cotton is placed between the thermal insulation board and the cover.

5. The hot air assembly of claim 4, wherein, The heat insulation board is provided with a bracket, and the heating tube extends out of the air duct and is installed on the heat insulation board through the bracket.

6. The hot air assembly of claim 4, wherein, The hot air assembly also includes: The motor is located on the side of the heat insulation plate opposite to the cover. A connecting shaft connects the motor and the fan.

7. The hot air assembly of claim 6, wherein, The heat insulation plate has a groove, the motor is disposed in the groove, the boss has a clearance groove, and the groove is embedded in the clearance groove.

8. The hot air assembly of claim 7, wherein, The height of the motor is less than or equal to 30 millimeters.

9. The hot air assembly of claim 1, wherein, The air duct is U-shaped.

10. A cooking appliance, wherein, Includes a cooking cavity, the cooking cavity having multiple first through holes and multiple second through holes; and The hot air assembly as described in any one of claims 1-9 is located on the cooking cavity, the air duct connects the first through hole and the second through hole, the first through hole is correspondingly disposed with the fan, and the second through hole is correspondingly disposed with the heating element; the fan is used to drive the airflow in the cooking cavity to enter the air duct from the first through hole and flow through the heating element to the cooking cavity through the second through hole.

11. The cooking appliance of claim 10, wherein, The diameters of the first through hole and the second through hole range from 3 to 6 millimeters.

12. The cooking appliance of claim 10, wherein, The cooking appliance also includes: A support plate, which is rotatably disposed within the cooking cavity.

13. The cooking appliance of claim 10, wherein, The hot air assembly is located at the top of the cooking cavity.

14. The cooking appliance of claim 10, wherein, The cooking appliance also includes an outer cover that covers the cooking cavity.

Images