Hot air systems and cooking appliances

Abstract

The present invention provides a hot air system and a cooking appliance. The hot air component is applied to the hot air system and includes: a cover; a heating element disposed in the cover; and a fan connected to the cover. The heating element is arranged around the fan, and the fan is used to drive airflow so that the airflow flows away from the cover after passing through the heating element.

Description

Technical Field

[0001] This invention relates to the field of household appliance technology, and more specifically, to a hot air system and a cooking appliance. Background Technology

[0002] Currently, the hot air function of hot air assemblies is used to assist cooking appliances in making heating more efficient. However, in related technologies, the fan is located on one side of the heating element. When the fan drives the airflow, the airflow passes through the middle section of the heating element, and the heat at both ends of the heating element is not easily carried away by the airflow. This reduces the utilization rate of the heating element's heat output by the hot air assembly and can easily cause local overheating, resulting in uneven heat distribution within the cooking appliance's cavity. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] Therefore, a first aspect of the present invention provides a hot air assembly.

[0005] A second aspect of the present invention also provides a hot air system.

[0006] A third aspect of the invention also provides a cooking utensil.

[0007] In view of this, a first aspect of the present invention provides a hot air assembly applied to a hot air system. The hot air assembly includes: a cover; a heating element disposed on the cover; and a fan connected to the cover. The heating element surrounds the fan, and the fan drives airflow so that the airflow flows away from the cover after passing through the heating element.

[0008] The hot air assembly provided by this invention is applied to a hot air system for providing hot air. The hot air assembly includes a housing, heating elements, and a fan. The heating elements are housed within the housing, and the fan is connected to the housing for fixation. The heating elements surround the fan. When the fan is on, the airflow blown by the fan passes through the heating elements surrounding the fan, allowing the airflow to exchange heat with the heating elements and then flow away from the housing, thus delivering hot air. Simultaneously, the surrounding heating elements ensure that all of them participate in heat exchange, thereby improving the heat exchange effect and making the hot air blown by the fan more evenly distributed. This reduces the temperature difference of the airflow blown by the hot air assembly to different locations, ensuring the heating effect of the hot air assembly and improving the utilization rate of the heat from the heating elements.

[0009] The hot air assembly provided by the present invention may also have the following additional technical features:

[0010] In some possible designs, the heating element is in the shape of a ring, and the rotation center of the fan is set concentrically with the center of the heating element.

[0011] In this design, the heating element is in the shape of a ring, and the fan is set inside the ring-shaped heating element. When the fan is turned on, the airflow blown by the fan in different directions can exchange heat with the heating element, which improves the heat exchange efficiency and makes the hot air blown in all directions more uniform. The rotation center of the fan is set to be concentric with the center of the heating element, so that the air volume delivered by the fan to all parts of the heating element is the same, thereby improving the uniformity of hot air in all directions.

[0012] In some possible designs, the hot air assembly also includes: a heat insulation plate connected to the cover and located on the side of the cover away from the heating element; and heat insulation cotton placed between the heat insulation plate and the cover.

[0013] In this design, the hot air assembly also includes a heat insulation plate and heat insulation cotton. The heat insulation plate is located on the side of the cover away from the heating element, which can insulate the heating element from the drive component outside the heat insulation plate, preventing fan failure due to overheating of the drive component area. The heat insulation cotton is sandwiched between the heat insulation plate and the cover, further improving the heat insulation effect.

[0014] In some possible designs, the cover has a first boss, a second boss, and a groove on the side facing the heating element; the fan is mounted on the second boss, the groove and the first boss surround the periphery of the second boss, the groove is located between the first boss and the second boss, and the heating element is located in the groove.

[0015] In this design, the cover has a first protrusion, a second protrusion, and a groove between the first and second protrusions on the side facing the heating element. The heating element is housed in the groove, providing a space for it. A fan is mounted on the second protrusion, which, when turned on, blows air onto the heating element, thereby heating the air. Simultaneously, the first protrusion surrounds the second protrusion, and thus the fan, effectively preventing hot air from escaping.

[0016] In some possible designs, the sidewalls of the groove are inclined away from the heating element from the bottom wall of the groove to the opening end of the groove.

[0017] In this design, from the bottom wall of the groove to the opening end of the groove, the side wall of the groove is inclined away from the heating tube, which has the effect of concentrating the airflow and reducing heat loss.

[0018] In some possible designs, a bracket is provided in the groove, and the heating element is mounted in the groove through the bracket. A clearance groove is provided on the first protrusion, which is connected to the groove and corresponding to the bracket. And / or a wire hole is provided in the groove, and the heating element includes a connecting wire, which passes through the wire hole. And / or a mounting structure is provided in the groove for mounting the bracket.

[0019] In this design, the heating element is mounted in a groove via a bracket. A first protrusion is located on the outside of the groove, and a clearance groove is provided on the first protrusion, communicating with the groove. This facilitates the disassembly and installation of the heating element and the bracket within the groove. Specifically, when installing or removing the bracket, the user can insert their fingers into the clearance groove to manipulate the bracket, improving the ease of installation or removal. A wire-passing hole is provided in the groove for the connection wire of the heating element to pass through, reducing the wiring length. An installation structure is provided in the groove, through which the bracket of the hot air assembly is fixed in the groove. The heating element is also fixed in the groove via the bracket, which supports the heating element, creating a gap between the heating element and the cover. This prevents the heating element from directly contacting the cover, reducing heat conduction between the heating element and the cover, improving the heat exchange effect between the heating element and the airflow, enhancing airflow flow, and reducing heat transfer from the heating element to components on the side of the cover away from the fan.

[0020] In some possible designs, the cover is also provided with a connecting part, through which the cover is connected to the heat insulation plate, and / or the cover is also provided with reinforcing ribs.

[0021] In this design, a connecting part is provided on the cover so that the cover can be connected to the heat insulation board through the connecting part, thereby improving the connection strength between the two. The reinforcing ribs on the cover can strengthen the cover and prevent air leakage caused by deformation.

[0022] In some possible designs, the hot air assembly also includes: a motor located on the side of the housing away from the heating element; and a connecting shaft connecting the motor and the fan.

[0023] In this design, the hot air assembly also includes a motor and a connecting shaft. The motor is positioned on the side of the housing away from the heating element to reduce the heat transferred from the heating element to the motor, ensuring its normal operation. The connecting shaft connects the motor and the fan; the motor drives the fan to rotate via the connecting shaft, thus enabling the hot air assembly to deliver hot air.

[0024] According to a second aspect of the present invention, a hot air system is also provided, comprising: a housing, the housing including a cavity having a plurality of through holes; and a hot air assembly as described in any of the first aspects, a cover being connected to the housing and enclosing a receiving cavity with the outer side wall of the housing, and a fan being used to drive airflow so that airflow in the cavity enters the receiving cavity and flows through the heating tube and then through the through holes to the cavity.

[0025] The second aspect of this invention proposes a hot air system comprising a housing and a hot air assembly. The housing and a cover enclose a receiving cavity, within which a fan and a heating element are located. The fan exchanges heat with the airflow within the cavity through a through-hole in the housing. Specifically, the fan drives the airflow, causing the airflow corresponding to the central region of the fan within the cavity to enter the receiving cavity under negative pressure. After passing through the heating element, the airflow exits the receiving cavity through the through-hole and flows back into the cavity, thus achieving air delivery by the hot air system and improving its heat exchange efficiency. Furthermore, the heating element surrounding the fan ensures more uniform temperature distribution of the airflow blowing in multiple directions.

[0026] In some possible designs, the housing has a first recessed platform, a second recessed platform, and a third protrusion on the side facing the cover; the second recessed platform is located inside the first recessed platform, the third protrusion is located inside the second recessed platform, and through holes are located on the second recessed platform and the third protrusion. The third protrusion is positioned corresponding to the center of the fan, and the fan is used to drive airflow into the receiving cavity through the through hole on the third protrusion, and after passing through the heating tube, into the cavity through the through hole on the second recessed platform; wherein, the first protrusion of the cover fits against the first recessed platform.

[0027] In this design, the shell has a first recessed platform, a second recessed platform, and a third protrusion on the side facing the cover. The second recessed platform is located within the first recessed platform, and thus recessed away from the cover. The third protrusion is located within the second recessed platform, and thus protrudes towards the cover. Through holes are located on the second recessed platform and the third protrusion, with the third protrusion positioned corresponding to the center of the fan. Thus, when the fan is on, a portion of the air corresponding to the third protrusion in the cavity flows into the receiving cavity through the through hole on the third protrusion under negative pressure. Then, under the action of the fan, it flows towards the surrounding heating elements, exchanges heat with them, and flows into the cavity through the through hole on the second recessed platform. The first protrusion of the cover fits snugly against the first recessed platform, increasing the path and resistance of the hot air, which helps prevent hot air from escaping through the gap between the cover and the shell, thereby avoiding heat loss and improving the hot air volume and heat exchange efficiency of the hot air system.

[0028] In some possible designs, the sidewall connecting the second sinker to the first sinker is inclined away from the third protrusion.

[0029] In this design, the side wall connecting the second and first platforms is inclined and tilted away from the third protrusion. After the airflow passes through the heating tube, it can be guided by the inclined wall to gather inside the cavity. When the food is heated by the hot air system, the heating effect on the food can be improved.

[0030] In some possible designs, the housing is further provided with a third recessed platform, which is located on at least a portion of the periphery of the first recessed platform and is recessed toward the side away from the fan; and / or the housing is further provided with a fourth recessed platform, which is located on the third protrusion and is recessed toward the side away from the fan, and the fourth recessed platform is correspondingly provided with the connecting shaft of the fan.

[0031] In this design, a third recessed platform is provided on the housing, located at least partially around the first recessed platform. This platform is recessed from the side of the housing facing the cover towards the fan, causing it to protrude outwards from the receiving cavity. This allows airflow to be drawn towards the center of the cavity by the obstruction of the third recessed platform when it flows out through the through-hole, thus utilizing the hot air more efficiently. A fourth recessed platform is provided on the housing, located on the third protrusion and recessed towards the side away from the fan. This serves to prevent airflow from reaching the connecting shaft between the fan and the motor, improving hot air efficiency while maintaining a compact structure.

[0032] In some possible designs, the diameter of the through-hole is greater than or equal to 3 mm and less than or equal to 10 mm; and / or the spacing between adjacent through-holes is greater than or equal to twice the thickness of the housing.

[0033] In this design, if the diameter of the through-hole is too large, it will affect the strength of the casing; if the diameter is too small, it will affect the air intake. Therefore, the diameter of the through-hole is set between 3mm and 10mm to ensure the air intake while avoiding any impact on the strength of the casing. If the spacing between adjacent through-holes is too small, it will reduce the strength of the casing. Therefore, the spacing between adjacent through-holes is set to be greater than or equal to twice the thickness of the casing to avoid affecting the strength of the casing.

[0034] In some possible designs, the hot air assembly is located on the top wall of the housing.

[0035] In this design, the hot air assembly is positioned on the top wall of the housing, enabling better heating of the food inside the cavity. Furthermore, placing the hot air assembly on the top wall reduces the space it occupies on the sides of the housing, thus facilitating the storage of the hot air system and minimizing its footprint in the kitchen.

[0036] According to a third aspect of the invention, a cooking appliance is also provided, comprising: a hot air assembly as described in any of the first aspects, or a hot air system as described in any of the second aspects.

[0037] The cooking appliance according to the third aspect of the present invention includes the hot air assembly according to any one of the first aspects or the hot air system according to any one of the second aspects, and therefore has all the beneficial effects of the hot air assembly or the hot air system, which will not be repeated here.

[0038] In some possible designs, where the cooking appliance includes a hot air system, the housing of the hot air system serves as the housing of the cooking appliance.

[0039] In this design, when the cooking appliance includes a hot air system, the housing of the hot air system serves as the housing of the cooking appliance, thereby reducing the number of parts used, lowering manufacturing costs, and making the structure more compact.

[0040] Additional aspects and advantages of the invention will become apparent in the following description or may be learned by practice of the invention. Attached Figure Description

[0041] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0042] Figure 1 One of the structural schematic diagrams of a hot air assembly according to an embodiment of the present invention is shown;

[0043] Figure 2 An exploded view of a hot air assembly according to an embodiment of the present invention is shown;

[0044] Figure 3 A second schematic diagram of the structure of a hot air assembly according to an embodiment of the present invention is shown;

[0045] Figure 4 A schematic diagram of the structure of a cover according to an embodiment of the present invention is shown;

[0046] Figure 5 One of the structural schematic diagrams of a hot air system according to an embodiment of the present invention is shown;

[0047] Figure 6 A second schematic diagram of the structure of a hot air system according to an embodiment of the present invention is shown;

[0048] Figure 7 A partial structural schematic diagram of a hot air system according to an embodiment of the present invention is shown;

[0049] Figure 8 A third schematic diagram of the structure of a hot air system according to an embodiment of the present invention is shown;

[0050] Figure 9 It shows Figure 8 An enlarged view of point A in the illustrated embodiment;

[0051] Figure 10 The fourth schematic diagram shows the structure of a hot air system according to an embodiment of the present invention.

[0052] in, Figures 1 to 10 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0053] 1. Hot air assembly, 10. Cover, 101. First boss, 102. Second boss, 102. Shaft hole, 103. Groove, 104. Clearance groove, 105. Wire hole, 106. Mounting structure, 1060. Positioning hole, 1062. First connecting hole, 107. Connecting part, 1072. Second connecting hole, 108. Reinforcing rib, 11. Heating element, 12. Fan, 13. Heat insulation board, 14. Heat insulation cotton, 15. Bracket, 16. Motor, 17. Connecting shaft, 18. Connector, 2. Housing, 20. Cavity, 200. Through hole, 21. Receiving cavity, 22. First recessed platform, 23. Second recessed platform, 24. Third boss, 25. Third recessed platform, 26. Fourth recessed platform, 27. Through hole. Detailed Implementation

[0054] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0055] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0056] The following reference Figures 1 to 10 The present invention describes a hot air assembly 1, a hot air system, and a cooking appliance according to some embodiments thereof.

[0057] like Figure 1 and Figure 2 As shown, according to an embodiment of the present invention, the present invention provides a hot air assembly 1, which is applied to a hot air system. The hot air assembly 1 includes: a cover 10, a heating element 11, and a fan 12.

[0058] Specifically, the heating element 11 is located on the cover 10; the fan 12 is connected to the cover 10, the heating element 11 is arranged around the fan 12, and the fan 12 is used to drive the airflow so that the airflow flows away from the cover 10 after passing through the heating element 11.

[0059] The hot air assembly 1 provided by this invention is applied to a hot air system to provide hot air. The hot air assembly 1 includes a housing 10, heating elements 11, and a fan 12. The heating elements 11 are disposed inside the housing 10, and the fan 12 is connected to the housing 10, thus fixing the fan 12. The heating elements 11 surround the fan 12. When the fan 12 is turned on, the airflow blown by the fan 12 can pass through the heating elements 11 surrounding the fan 12, allowing the airflow to exchange heat with the heating elements 11 and then flow away from the housing 10, thus delivering hot air. Simultaneously, the surrounding of the heating elements 11 ensures that all of them can participate in heat exchange, thereby improving the heat exchange effect and making the hot air blown by the fan 12 more evenly distributed, reducing the temperature difference of the airflow blown by the hot air assembly 1 to different locations, and ensuring the heating effect of the hot air assembly 1.

[0060] It is understandable that the heating element 11 is arranged circumferentially around the fan 12 along the rotation axis of the fan 12.

[0061] In practical applications, the heating element 11 can be arranged in a closed annular structure around the fan 12, such as a circular annular heating element 11 or an elliptical heating element 11. This allows airflow from different directions blown by the fan 12 to exchange heat with the heat exchange element, improving the heat exchange effect and making the hot air blown by the fan 12 more uniform in all directions. The heating element 11 can also be arranged in an annular structure with a notch around the fan 12, such as a semi-circular annular heating element 11 or a semi-elliptical heating element 11, etc.

[0062] like Figure 1 As shown, according to one embodiment of this application, the heating element 11 is annular, and the rotation center of the fan 12 is concentric with the center of the heating element 11.

[0063] In this embodiment, the heating element 11 is annular, and the fan 12 is disposed inside the annular heating element 11. When the fan 12 is turned on, the airflow blown by the fan 12 in different directions can exchange heat with the heating element 11, thereby improving the heat exchange efficiency and making the hot air blown in all directions more uniform. The rotation center of the fan 12 is set to be concentric with the center of the heating element 11, so that the airflow delivered by the fan 12 to all parts of the heating element 11 is the same, thereby improving the uniformity of the hot air in all directions.

[0064] like Figure 2 and Figure 3 As shown, according to one embodiment of this application, the hot air assembly 1 further includes: a heat insulation plate 13 and heat insulation cotton 14.

[0065] Specifically, the heat insulation plate 13 is connected to the cover 10 and is located on the side of the cover 10 away from the heating tube 11; the heat insulation cotton 14 is disposed between the heat insulation plate 13 and the cover 10.

[0066] In this embodiment, the hot air assembly 1 further includes a heat insulation plate 13 and heat insulation cotton 14. The heat insulation plate 13 is located on the side of the cover 10 away from the heating tube 11, which can insulate the heating tube 11 from the driving component outside the heat insulation plate 13, thus preventing the fan 12 from failing due to overheating of the driving component area. The heat insulation cotton 14 is sandwiched between the heat insulation plate 13 and the cover 10, further improving the heat insulation effect.

[0067] It is understandable that a drive component is provided on the side of the heat insulation board 13 away from the heat insulation cotton 14. The drive component is connected to the fan 12 and is used to drive the fan 12 to rotate. The drive component can be a motor 16, a control circuit board, etc.

[0068] like Figure 4 As shown, according to one embodiment of this application, the cover 10 is provided with a first boss 101, a second boss 102 and a groove 103 on the side facing the heating tube 11.

[0069] Specifically, the fan 12 is mounted on the second boss 102, the groove 103 and the first boss 101 surround the periphery of the second boss 102, the groove 103 is located between the first boss 101 and the second boss 102, and the heating tube 11 is located in the groove 103.

[0070] In this embodiment, the cover 10 has a first protrusion 101, a second protrusion 102, and a groove 103 located between the first protrusion 101 and the second protrusion 102 on the side facing the heating tube 11. The heating tube 11 is disposed in the groove 103, providing a space for the heating tube 11. The fan 12 is disposed on the second protrusion 102, and when the fan 12 is turned on, it can blow air to the heating tube 11, thereby heating the air. At the same time, the first protrusion 101 surrounds the periphery of the second protrusion 102, and thus surrounds the periphery of the fan 12, so that the first protrusion 101 has the effect of preventing hot air from escaping.

[0071] In practical applications, along the rotation axis of the fan 12, the height of the second boss 102 is lower than the height of the first boss 101.

[0072] Furthermore, both the groove 103 and the first boss 101 are annular.

[0073] Furthermore, the second boss 102 is provided with a shaft hole 1022, through which the connecting shaft 17 passes to connect with the fan 12.

[0074] Furthermore, a portion of the bottom wall of the second boss 102 protrudes towards the fan 12 to form a mounting boss. The fan 12 includes a mounting portion and fan blades disposed around the mounting portion. The mounting portion is disposed on the mounting boss, and the fan blades are located in the peripheral area of ​​the mounting boss.

[0075] like Figure 9 As shown, according to one embodiment of this application, from the bottom wall of the groove 103 to the opening end of the groove 103, the sidewall of the groove 103 is inclined away from the heating tube 11.

[0076] In this embodiment, from the bottom wall of the groove 103 to the opening end of the groove 103, the side wall of the groove 103 is inclined away from the heating tube 11, which has the effect of concentrating the airflow and reducing heat loss.

[0077] It is understandable that the bottom wall of the groove 103 is connected to the side walls on both sides of the bottom wall of the groove 103, and the two side walls of the groove 103 enclose the opening end.

[0078] like Figure 2 and Figure 4 As shown, according to one embodiment of this application, the first boss 101 is provided with a clearance groove 104, which communicates with the groove 103; and / or the groove 103 is provided with a wire hole 105, the heating tube 11 includes a connecting wire, and the connecting wire passes through the wire hole 105; and / or the groove 103 is provided with a mounting structure 106, the hot air assembly 1 also includes a bracket 15, the mounting structure 106 is used to mount the bracket 15, and the heating tube 11 is connected to the bracket 15.

[0079] In this embodiment, the first boss 101 is located outside the groove 103. A clearance groove 104 is provided on the first boss 101 and communicates with the groove 103, which facilitates the disassembly and installation of the heating element 11 within the groove 103. Specifically, when installing or removing the heating element 11, the user can insert their fingers into the clearance groove 104 to operate the heating element 11, improving the convenience of installing or removing the heating element 11. A wire hole 105 is provided in the groove 103 for the connection wire of the heating element 11 to pass through, reducing the wiring length. An installation structure 106 is provided in the groove 103. The bracket 15 of the hot air assembly 1 is fixed in the groove 103 through the installation structure 106. The heating tube 11 is fixed in the groove 103 through the bracket 15. The bracket 15 supports the heating tube 11, so that there is a gap between the heating tube 11 and the cover 10, thereby avoiding direct contact between the heating tube 11 and the cover 10, reducing the heat conduction between the heating tube 11 and the cover 10, improving the heat exchange effect between the heating tube 11 and the airflow, improving the airflow flow, and also reducing the heat transfer from the heating tube 11 to the components of the cover 10 away from the fan 12.

[0080] In practical applications, there are multiple brackets 15, and the number of mounting structures 106 is the same as the number of brackets 15.

[0081] Furthermore, multiple supports 15 are spaced apart circumferentially along the groove 103.

[0082] Furthermore, the mounting structure 106 includes a positioning hole 1060 and a first connecting hole 1062. The bracket 15 is positioned in the groove 103 through the positioning hole 1060 and fixed to the groove 103 through the first connecting hole 1062.

[0083] Furthermore, the bracket 15 is provided with a positioning post, which is connected to the positioning hole 1060 to realize the positioning of the bracket 15. The connector 18 (such as screws, bolts, etc.) passes through the first connecting hole 1062 and connects to the bracket 15 to realize the fixation of the bracket 15 and the groove 103.

[0084] like Figure 1 and Figure 4 As shown, according to one embodiment of this application, the cover 10 is further provided with a connecting part 107, the cover 10 is connected to the heat insulation plate 13 through the connecting part 107, and / or the cover 10 is further provided with reinforcing ribs 108.

[0085] In this embodiment, a connecting part 107 is provided on the cover 10 so that the cover 10 is connected to the heat insulation plate 13 through the connecting part 107, thereby improving the connection strength between the two. A reinforcing rib 108 is provided on the cover 10 to strengthen the strength of the cover 10 and prevent the cover 10 from deforming and causing air leakage.

[0086] In a specific application, the connecting part 107 protrudes in the direction away from the fan 12. Specifically, the connecting part 107 is a convex hull, and further, a second connecting hole 1072 is provided on the convex hull.

[0087] Furthermore, the connecting portion 107 is located around the first boss 101.

[0088] Furthermore, the number of reinforcing ribs 108 is multiple.

[0089] Furthermore, the reinforcing rib 108 is located around the first boss 101. Specifically, the reinforcing rib 108 is U-shaped. Of course, the reinforcing rib 108 can also be set in other shapes, such as strips, angles, etc.

[0090] like Figure 2 and Figure 3 As shown, according to one embodiment of this application, the hot air assembly 1 further includes a motor 16 and a connecting shaft 17.

[0091] Specifically, the motor 16 is located on the side of the cover 10 away from the heating tube 11; the connecting shaft 17 connects the motor 16 and the fan 12.

[0092] In this embodiment, the hot air assembly 1 further includes a motor 16 and a connecting shaft 17. The motor 16 is located on the side of the cover 10 away from the heating tube 11 to reduce the heat transferred from the heating tube 11 to the motor 16 and ensure that the motor 16 can work normally. The connecting shaft 17 connects the motor 16 and the fan 12. The motor 16 drives the fan 12 to rotate through the connecting shaft 17, thereby realizing the delivery of hot air by the hot air assembly 1.

[0093] In specific applications, the motor 16 is located on the side of the heat insulation plate 13 away from the cover 10. Through the heat insulation plate 13 and the heat insulation cotton 14, the heat transferred from the heating tube 11 to the motor 16 is further reduced, thus preventing the motor 16 from failing due to excessive temperature.

[0094] like Figure 5 , Figure 6 , Figure 8 and Figure 10 As shown, according to an embodiment of the present invention, a hot air system is also proposed, comprising: a housing 2, the housing 2 including a cavity 20, the cavity 20 having a plurality of through holes 200; and a hot air assembly 1 as proposed in any of the above embodiments, the cover 10 being connected to the housing 2 and enclosing a receiving cavity 21 with the outer side wall of the housing 2, and a fan 12 being used to drive airflow so that the airflow in the cavity 20 enters the receiving cavity 21 and flows through the heating tube 11 and then through the through holes 200 to the cavity 20.

[0095] A hot air system according to one embodiment of the present invention includes a housing 2 and a hot air assembly 1. The housing 2 and the cover 10 enclose a receiving cavity 21. A fan 12 and a heating element 11 are both located inside the receiving cavity 21 and exchange heat with the airflow inside the cavity 20 through a through hole 200 on the housing 2. The fan 12 drives the airflow, so that the airflow in the cavity 20 corresponding to the middle region of the fan 12 enters the receiving cavity 21 under the action of negative pressure, then passes through the heating element 11, and then flows out of the receiving cavity 21 through the through hole 200 and flows into the cavity 20, realizing the air supply of the hot air system and improving the heat exchange efficiency of the hot air system. At the same time, the heating element 11 is arranged around the fan 12, which can also make the temperature of the airflow blown in multiple directions more uniform.

[0096] In specific applications, such as Figure 10 As shown, the arrows inside cavity 20 indicate the direction of airflow. Air in cavity 20 corresponding to the middle of fan 12 enters the receiving cavity 21 through the through hole 200 under the negative pressure generated by the rotation of fan 12. After passing through heating element 11, it exits the receiving cavity 21 through another part of the through hole 200 and then enters cavity 20, thus heating the food inside cavity 20. In other words, through the through hole 200 on shell 2, part of the airflow enters the receiving cavity 21 from cavity 20, and another part flows from the receiving cavity 21 into cavity 20.

[0097] like Figure 6 and Figure 7 As shown, according to one embodiment of this application, the housing 2 is provided with a first recessed platform 22, a second recessed platform 23 and a third protrusion 24 on the side facing the cover 10.

[0098] Specifically, the second recessed platform 23 is located inside the first recessed platform 22, the third protrusion 24 is located inside the second recessed platform 23, and the through hole 200 is located on the second recessed platform 23 and the third protrusion 24. The third protrusion 24 is located at the center of the fan 12. The fan 12 is used to drive the airflow into the receiving cavity 21 through the through hole 200 on the third protrusion 24, and after passing through the heating tube 11, it flows into the cavity 20 through the through hole 200 on the second recessed platform 23. The first protrusion 101 of the cover 10 is in contact with the first recessed platform 22.

[0099] In this embodiment, the housing 2 is provided with a first recessed platform 22, a second recessed platform 23, and a third protrusion 24 on the side facing the cover 10. The second recessed platform 23 is disposed inside the first recessed platform 22, and the second recessed platform 23 is recessed from the first recessed platform 22 in a direction away from the cover 10. The third protrusion 24 is disposed inside the second recessed platform 23, and the third protrusion 24 protrudes in a direction close to the cover 10. A through hole 200 is disposed on the second recessed platform 23 and the third protrusion 24, and the third protrusion 24 is disposed corresponding to the center of the fan 12. Thus, when the fan 12 is turned on, part of the air in the cavity 20 corresponding to the third protrusion 24 flows into the receiving cavity 21 through the through hole 200 on the third protrusion 24 under the action of negative pressure, and then flows to the surrounding heating tube 11 under the action of the fan 12. After exchanging heat with the heating tube 11, it flows into the cavity 20 through the through hole 200 on the second recessed platform 23. The first protrusion 101 of the cover 10 fits into the first recess 22, which increases the path and resistance of the hot air, helps to prevent the hot air from escaping from the gap between the cover 10 and the shell 2, thereby avoiding heat loss and improving the hot air volume and heat exchange effect of the hot air system.

[0100] It should be noted that the cover 10 has a first protrusion 101, a second protrusion 102 and a groove 103 on the side facing the heating tube 11; the fan 12 is installed on the second protrusion 102, the groove 103 and the first protrusion 101 surround the periphery of the second protrusion 102, the groove 103 is located between the first protrusion 101 and the second protrusion 102, and the heating tube 11 is located in the groove 103.

[0101] Furthermore, from the bottom wall of the groove 103 to the opening end of the groove 103, the side wall of the groove 103 is inclined away from the heating tube 11.

[0102] Furthermore, the first protrusion 101 is inclined away from the wall surface of the second protrusion 102, and the first recessed platform 22 is inclined away from the wall surface of the second recessed platform 23. The inclined wall surface of the first protrusion 101 is in contact with the inclined wall surface of the first recessed platform 22, and the top of the first protrusion 101 is in contact with the bottom wall of the first recessed platform 22, forming a region that has both horizontal contact and inclined slope. This region increases the path and resistance of hot air when it passes through, which helps to prevent hot air from escaping from the fitting gap between the cover 10 and the shell 2, thus preventing heat loss.

[0103] It is understandable that the first sinking platform 22 and the second sinking platform 23 are recessed in the direction away from the cover body 10.

[0104] In practical applications, the second recessed platform 23, the third recessed platform 25, the groove 103, and the second protrusion 102 together enclose the receiving cavity 21.

[0105] Specifically, the cover 10 is a heating tube cover.

[0106] like Figure 9 As shown, according to one embodiment of this application, the sidewall of the second recessed platform 23 connected to the first recessed platform 22 is inclined away from the third protrusion 24.

[0107] In this embodiment, the side wall connecting the second sinking platform 23 and the first sinking platform 22 is inclined and tilted away from the third protrusion 24. After the airflow passes through the heating tube 11, it can gather in the cavity 20 under the guidance of the inclined wall surface along the second sinking platform 23. When the food is heated by the hot air system, the heating effect of the food can be improved.

[0108] like Figure 7 As shown, according to one embodiment of this application, the housing 2 is further provided with a third recessed platform 25, which is located on at least a portion of the periphery of the first recessed platform 22 and recessed toward the side away from the fan 12; and / or the housing 2 is further provided with a fourth recessed platform 26, which is located on the third protrusion 24 and recessed toward the side away from the fan 12, and the fourth recessed platform 26 is correspondingly provided with the connecting shaft 17 of the fan 12.

[0109] In this embodiment, a third recessed platform 25 is provided on the housing 2. The third recessed platform 25 is located on at least a portion of the periphery of the first recessed platform 22 and is recessed from the side of the housing 2 toward the cover 10 in a direction away from the fan 12, so that the third recessed platform 25 protrudes outward from the receiving cavity 21. In this way, when the airflow flows out of the receiving cavity 21 through the through hole 200, it can be blocked by the third recessed platform 25 and move towards the center of the cavity 20, thereby making more efficient use of hot air. A fourth recessed platform 26 is provided on the housing 2. The fourth recessed platform 26 is located on the third protrusion 24 and is recessed in a direction away from the fan 12 to avoid the connecting shaft 17 between the fan 12 and the motor 16. This not only improves the efficiency of hot air flow but also makes the structure compact.

[0110] It is understood that the hot air assembly 1 includes a motor 16 and a connecting shaft 17. The motor 16 is connected to the fan 12 through the connecting shaft 17. The motor 16 is located on the heat insulation plate 13 of the hot air assembly 1. The connecting shaft 17 passes through the heat insulation plate 13 and the cover 10 and is connected to the fan 12. Therefore, when the connecting shaft 17 is long, it can be avoided by the fourth recessed platform 26, making the hot air system structure more compact.

[0111] In practical applications, the third recessed platform 25 is recessed along the axial direction of the fan 12 away from the fan 12 to form an air-blocking zone.

[0112] Furthermore, a through hole 27 is provided in the middle of the fourth sinking platform 26.

[0113] Furthermore, the third sinking platform 25 is inclined on the side closest to the first sinking platform 22, and under the guidance of the inclined sidewall of the first sinking platform 22, the airflow can gather towards the center of the cavity 20. Specifically, the cross-sectional area of ​​the third sinking platform gradually increases from the bottom wall of the third sinking platform 25 to the opening end of the third sinking platform 25.

[0114] According to one embodiment of this application, the diameter of the through hole 200 is greater than or equal to 3 mm and less than or equal to 10 mm; and / or the spacing between adjacent through holes 200 is greater than or equal to twice the thickness of the housing 2.

[0115] In this embodiment, if the diameter of the through hole 200 is too large, it will affect the strength of the housing 2; if the diameter of the through hole 200 is too small, it will affect the air intake. Therefore, setting the diameter of the through hole 200 between 3mm and 10mm ensures the air intake while avoiding any impact on the strength of the housing 2. If the spacing between adjacent through holes 200 is too small, it will reduce the strength of the housing 2. Therefore, setting the spacing between adjacent through holes 200 to be greater than or equal to twice the thickness of the housing 2 can avoid any impact on the strength of the housing 2.

[0116] It is understandable that the thickness of the shell 2 is specifically the thickness of the plate body of the shell 2 with the through hole 200.

[0117] In specific applications, the diameter of the through hole 200 can be any value among 4mm, 5mm, 6mm, 7mm, 8mm, and 9mm.

[0118] Furthermore, the spacing between adjacent through holes 200 is greater than or equal to twice the thickness of the shell 2, and less than or equal to ten times the thickness of the shell 2.

[0119] Furthermore, the spacing between adjacent through holes 200 is greater than or equal to twice the thickness of the housing 2, and less than or equal to five times the thickness of the housing 2.

[0120] like Figure 5 and Figure 6 As shown, according to one embodiment of this application, the hot air assembly 1 is disposed on the top wall of the housing 2.

[0121] In this embodiment, the hot air assembly 1 is disposed on the top wall of the housing 2, which can better heat the food inside the cavity 20. In addition, placing the hot air assembly 1 on the top wall of the housing 2 can reduce the space occupied by the hot air assembly 1 on both sides of the housing 2, thereby facilitating the storage of the hot air system and reducing the space occupied in the kitchen.

[0122] Specifically, the hot air assembly 1 is located on the outside of the housing 2.

[0123] It is understandable that the first recessed platform 22, the second recessed platform 23, the third protrusion 24, the third recessed platform 25 and the fourth recessed platform 26 are set on the top wall of the shell 2.

[0124] Furthermore, the motor 16 is located on the outside of the housing 2, thereby preventing high temperature from affecting the motor 16.

[0125] According to one embodiment of the present invention, a cooking appliance is also provided, comprising: a hot air assembly 1 as provided in any embodiment, or a hot air system as provided in any of the above embodiments.

[0126] The cooking appliance proposed in one embodiment of the present invention includes the hot air assembly 1 or the hot air system as proposed in any of the above embodiments, and therefore has all the beneficial effects of the hot air assembly 1 or the hot air system, which will not be repeated here.

[0127] According to one embodiment of this application, when the cooking appliance includes a hot air system, the housing 2 of the hot air system is the housing of the cooking appliance.

[0128] In this embodiment, when the cooking appliance includes a hot air system, the housing 2 of the hot air system serves as the housing of the cooking appliance, thereby reducing the use of parts, lowering manufacturing costs, and making the structure more compact.

[0129] It should be noted that cooking appliances include microwave ovens, air fryers, etc.

[0130] In practical applications, in order to overcome the technical problems of uneven hot air distribution and low hot air utilization rate in existing microwave ovens with hot air function, this application provides a hot air system and a microwave oven having the same. By cooperating the microwave oven cavity 21 and the hot air component 1, the system achieves the technical effects of reducing hot air escape, guiding hot air concentration, and making the hot air more evenly distributed in the cavity 21, thereby improving the hot air utilization efficiency of the microwave oven.

[0131] This application provides a hot air system and a microwave oven having the same. By setting the hot air fan 12 to be concentric with the annular heating tube 11, the annular boss on the hot air assembly 1 cooperating with the recessed platform on the receiving cavity 21, and setting an air baffle on the receiving cavity 21, the technical effects of making the hot air distribution uniform, increasing the path and resistance of the hot air when it passes through, reducing the escape of hot air, and guiding the hot air to gather towards the center of the oven are achieved, thereby improving the hot air utilization efficiency.

[0132] like Figures 1 to 10 As shown: The hot air system includes a hot air assembly 1 and a cavity 20.

[0133] The hot air assembly 1 includes a heat insulation plate 13, heat insulation cotton 14, a motor 16, a heating tube cover, a heating tube 11, a bracket 15, a fan 12, a fixing nut for the fan 12, and fixing screws for the hot air assembly 1.

[0134] The motor 16 is mounted on the heat insulation plate 13, and the heat insulation cotton 14 is sandwiched between the heat insulation plate 13 and the heating tube cover to prevent the motor 16 area from overheating and causing the fan 12 to fail.

[0135] The heating element 11 is ring-shaped and is mounted on the heating element cover via the bracket 15. The center of the ring of the heating element 11 is concentric with the axis of the fan 12, which allows the hot air blown in different directions to be evenly distributed.

[0136] The heating element cover includes a first boss 101 (annular boss), a groove 103 (annular groove), a second boss 102 (circular boss), a clearance groove 104 (which can be a groove), a mounting part of the bracket 15 (for fixing the bracket 15, such as mounting structure 106), a wire hole 105, a shaft hole 1022, a connecting part 107 (such as a bulge), and a reinforcing rib 108.

[0137] The clearance groove 104 on the annular boss is used to prevent fingers from getting stuck, making it easier to install the bracket 15.

[0138] The mounting portion of the bracket 15 and the wire passage hole 105 are disposed within an annular groove. The mounting portion of the bracket 15 includes a positioning hole 1060 for positioning when mounting the bracket 15 and a first connecting hole 1062 (e.g., a screw hole) for fixing. The wire passage hole 105 is used for the wires of the heating element 11 to pass through.

[0139] The shaft hole 1022 allows the connecting shaft 17 of the motor 16 (such as the motor shaft) to pass through. A second connecting hole 1072 on the bulge allows screws to pass through, securing the heat insulation plate 13 to the heating element cover. The reinforcing rib 108 strengthens the heating element cover and prevents deformation and air leakage.

[0140] The cavity 20 includes a first recessed platform 22, a second recessed platform 23, a third recessed platform 25, a third boss 24, a fourth recessed platform 26, and a through hole 27. The fourth recessed platform 26 serves to provide clearance for the motor shaft of the relatively long motor 16. For models with shorter motor shafts, this area can be made flat and the through hole 27 can be provided. Through holes 200 are evenly distributed on the second recessed platform 23 and the third boss 24 to provide channels for airflow. The diameter of the through holes 200 is between 3mm and 10mm, and the distance between adjacent holes is not less than twice the material thickness.

[0141] When the hot air component 1 of the hot air system is fitted with the cavity 20, the annular boss of the hot air component 1 fits against the first recess 22 of the cavity 20, forming a region that is both horizontally fitted and sloped. This region increases the path and resistance of the hot air as it passes through, which helps to prevent the hot air from escaping from the gap between the heating tube cover and the receiving cavity 21 and causing heat loss.

[0142] When the hot air system is working, the relatively cool air in the middle of cavity 20 enters from below the third protrusion 24 under the negative pressure generated by the rotation of fan 12, passes through heating tube 11, and gathers towards the center of the furnace along the slope of the second sinking platform 23. Some of the horizontally blowing hot air also moves towards the furnace center due to the obstruction of the third sinking platform 25, thus making more efficient use of the hot air.

[0143] This application provides a hot air system and a microwave oven having the same. By designing the fan 12 of the hot air assembly 1 to be concentric with the annular heating tube 11, the annular boss on the hot air assembly 1 to cooperate with the recessed platform on the receiving cavity 21, and setting an air baffle (such as a third recessed platform 25) on the cavity 20, the technical effects of making the hot air distribution uniform, increasing the path and resistance of the hot air when it passes through, reducing the escape of hot air, and guiding the hot air to gather towards the center of the oven are achieved, thereby improving the hot air utilization efficiency.

[0144] In this invention, the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "installed," "connected," "linked," and "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "linked" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0145] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. 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.

[0146] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A hot air system, characterized in that, include: The housing includes a cavity having multiple through holes; Hot air assembly, the hot air assembly comprising: Cover; Heating element is disposed in the cover; A fan is connected to the cover, and the heating element is arranged around the fan. The fan is used to drive airflow so that the airflow flows away from the cover after passing through the heating element. The heating element is circular, and the rotation center of the fan is concentric with the center of the heating element. The cover is connected to the housing and encloses a receiving cavity with the outer side wall of the housing; The housing has a second recessed platform on the side facing the cover, and a through hole is provided on the second recessed platform. The fan is used to drive airflow into the receiving cavity, and after passing through the heating tube, it flows into the cavity through the through hole on the second recessed platform. The housing is further provided with a first recessed platform and a third protrusion on the side facing the cover. The side wall connecting the second recessed platform and the first recessed platform is inclined and tilted away from the third protrusion.

2. The hot air system according to claim 1, characterized in that, The second recessed platform is disposed within the first recessed platform, the third protrusion is disposed within the second recessed platform, and the through hole is also disposed on the third protrusion. The third protrusion is disposed corresponding to the center of the fan, and the fan is used to drive airflow into the receiving cavity through the through hole on the third protrusion. The first protrusion of the cover is in contact with the first recessed platform.

3. The hot air system according to claim 1, characterized in that, The housing is further provided with a third recessed platform, which is located on at least a portion of the periphery of the first recessed platform and is recessed toward the side away from the fan; and / or The housing is also provided with a fourth recessed platform, which is located on the third protrusion and recessed towards the side away from the fan. The fourth recessed platform is correspondingly arranged with the connecting shaft of the fan.

4. The hot air system according to any one of claims 1 to 3, characterized in that, The diameter of the through hole is greater than or equal to 3 mm and less than or equal to 10 mm; and / or The spacing between adjacent through holes is greater than or equal to twice the thickness of the housing.

5. The hot air system according to any one of claims 1 to 3, characterized in that, The hot air assembly is located on the top wall of the housing.

6. The hot air system according to claim 1, characterized in that, 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.

7. The hot air system according to claim 6, characterized in that, The cover has a first boss, a second boss, and a groove on the side facing the heating tube; The fan is mounted on the second boss, the groove and the first boss surround the periphery of the second boss, the groove is located between the first boss and the second boss, and the heating element is located in the groove.

8. The hot air system according to claim 7, characterized in that, From the bottom wall of the groove to the opening end of the groove, the sidewall of the groove is inclined away from the heating tube.

9. The hot air system according to claim 7, characterized in that, A bracket is provided within the groove, and the heating element is mounted in the groove via the bracket. A clearance groove is provided on the first protrusion, communicating with the groove and corresponding to the bracket; and / or The groove is provided with a wire passage hole, and the heating element includes a connecting wire, which passes through the wire passage hole.

10. The hot air system according to claim 7, characterized in that, The cover is also provided with a connecting part, the cover is connected to the heat insulation plate through the connecting part, and / or the cover is also provided with reinforcing ribs.

11. The hot air system according to any one of claims 6 to 10, characterized in that, Also includes: The motor is located on the side of the cover away from the heating element; A connecting shaft connects the motor and the fan.

12. A cooking utensil, characterized in that, include: The hot air system as described in any one of claims 1 to 11.

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