Cooking appliance

Abstract

A cooking appliance (100). The cooking appliance (100) comprises a housing (10) and a hot air assembly (30). The housing (10) comprises a door body (20) and a cooking cavity (11). The door body (20) is used for opening or closing the cooking cavity (11). An air intake region (142) and an air output region (141) are provided on a top plate (14) of the cooking cavity (11), and the air intake region (142) is arranged farther away from the door body (20) than the air output region (141). The hot air assembly (30) comprises a flow guide plate (33), an impeller (34), a driving member (32) and a heating element (35). The flow guide plate (33) is disposed on the side of the top plate (14) facing away from the cooking cavity (11), and encloses a heating cavity (36) together with the top plate (14). The air intake region (142) and the air output region (141) are in communication with the heating cavity (36). The impeller (34) is rotatably disposed in the heating cavity (36), so as to drive an airflow to flow from the air output region (141) toward the air intake region (142), and the rotation axis of the impeller (34) is perpendicular to the top plate (14). The driving member (32) is disposed on the outer side of the heating cavity (36), and a rotating shaft of the driving member (32) penetrates the flow guide plate (33) and is connected to the impeller (34). The heating element (35) is disposed in the heating cavity (36) and is located between the impeller (34) and the air intake region (142). Since the air intake region (142) is arranged farther away from the door body (20) than the air output region (141), the effect of a high-temperature airflow on the door body (20) is reduced, thereby reducing the problem of an excessive temperature rise on the door body (20).

Description

Cooking utensils

[0001] Cross-references to related applications

[0002] This application claims priority and benefit from the following patent applications, the entire contents of which are incorporated herein by reference:

[0003] A Chinese patent application, application number 202411434259.7, entitled "Cooking Utensils," filed with the China National Intellectual Property Administration on October 14, 2024. Technical Field

[0004] This application relates to the field of cooking equipment technology, and more particularly to a cooking utensil. Background Technology

[0005] This section provides only background information relevant to this application and is not necessarily prior art. In cooking appliances with hot air function, the hot air assembly is usually located at the top of the cooking cavity. During operation, the hot air assembly blows hot air from top to bottom into the cooking cavity to cook food using hot air.

[0006] However, during the cooking process, the hot air inside the cooking cavity can easily cause the temperature of the cooking appliance door to rise too high, which can easily burn the user. Summary of the Invention

[0007] The purpose of this application is to at least solve the problem of excessive temperature rise in the door of cooking appliances. This purpose is achieved through the following technical solution:

[0008] This application discloses a cooking appliance, the cooking appliance comprising:

[0009] The cabinet includes a cooking cavity, and the top plate of the cooking cavity is provided with an air inlet area and an air outlet area;

[0010] A door, which is connected to the housing and is used to open or close the cooking cavity, wherein the air inlet area is located further away from the door than the air outlet area;

[0011] A hot air assembly includes a guide plate, an impeller, a drive unit, and a heating element. The guide plate is located on the side of the top plate opposite to the cooking cavity and surrounds the heating cavity with the top plate. The air inlet area and the air outlet area are respectively connected to the heating cavity. The impeller is rotatably disposed in the heating cavity to drive airflow from the air outlet area to the air inlet area. The rotation axis of the impeller is perpendicular to the top plate. The drive unit is located on the outside of the heating cavity. The rotation shaft of the drive unit passes through the guide plate and is connected to the impeller. The heating element is disposed in the heating cavity and located between the impeller and the air inlet area.

[0012] According to the cooking appliance of this application, when the hot air assembly is in use, the heating element operates, and the driving element drives the impeller to rotate in the heating chamber, so that the air in the cooking chamber enters the heating chamber through the air outlet area and flows in the direction of the air inlet area. When the airflow passes through the heating element, the heating element heats the passing airflow to form a high-temperature airflow. The high-temperature airflow enters the cooking chamber through the air inlet area, and the high-temperature airflow entering the cooking chamber heats and cooks the food in the cooking chamber.

[0013] Because the air intake area is located further away from the door than the air outlet area, the impact of high-temperature airflow on the door is reduced, thus lowering the door's temperature rise and reducing the risk of the door overheating and potentially causing burns to users.

[0014] In addition, the cooking appliance according to this application may also have the following additional technical features:

[0015] In some embodiments of this application, the guide plate includes a cavity with an opening, the top plate closes the opening and surrounds the heating cavity with the cavity, the cavity includes a first part and a second part connected together, the first part is connected to the air outlet area, at least part of the impeller is disposed in the first part, and the distance between the side wall of the first part and the impeller increases progressively along the rotation direction of the impeller, the second part is connected to the air inlet area, and the heating element is disposed in the second part.

[0016] In some embodiments of this application, the sidewall of the first part is an arc-shaped wall. Along a first direction, there is a first distance between the rotation axis of the impeller and the first side of the arc-shaped wall, and a second distance between the rotation axis of the impeller and the second side of the arc-shaped wall. The ratio of the second distance to the first distance is in the range of 1 to 1.5. The first direction is consistent with the length direction of the housing.

[0017] In some embodiments of this application, the first part has a first connecting end on the side facing the second part, the first connecting end being a flared structure, and the second part has a second connecting end on the side facing the first part, the second connecting end being connected to the first connecting end.

[0018] In some embodiments of this application, the rotation axis of the impeller passes through the center of the air outlet area.

[0019] In some embodiments of this application, the guide plate has a recessed structure on the side opposite to the heating cavity, and at least part of the driving member is housed within the recessed structure.

[0020] In some embodiments of this application, the recessed structure forms a convex structure on the side of the guide plate facing the top plate, and the impeller is provided with a receiving groove, at least part of the convex structure is received in the receiving groove.

[0021] In some embodiments of this application, the heating element includes at least one heating tube, which extends along a first direction, wherein the first direction is consistent with the length direction of the housing.

[0022] In some embodiments of this application, the number of heating elements is at least two, and all heating elements are arranged along a second direction, wherein the second direction is consistent with the width direction of the housing.

[0023] In some embodiments of this application, the housing further includes a front panel with a loading / unloading opening that communicates with the cooking cavity for a user to load or unload food within the cooking cavity. A door is pivotally connected to the front panel and is used to open or close the loading / unloading opening. The air inlet area is located further away from the front panel than the air outlet area. The minimum distance between the front panel and the heating element is in the range of 150 mm to 190 mm.

[0024] In some embodiments of this application, the housing further includes a rear panel, the rear panel and the front panel are spaced apart in a second direction, the air inlet area is closer to the door than the air outlet area, the distance between the air inlet area and the rear panel is in the range of 0 mm to 25 mm, wherein the second direction is consistent with the width direction of the housing.

[0025] In some embodiments of this application, the air outlet area includes a plurality of air outlet holes, which are evenly distributed within the air outlet area;

[0026] And / or, the air intake area includes a plurality of air intake holes, which are evenly distributed within the air intake area. Attached Figure Description

[0027] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0028] Figure 1 schematically shows a structural diagram of a cooking appliance according to an embodiment of the present application;

[0029] Figure 2 is a partial structural schematic diagram of the cooking utensil shown in Figure 1;

[0030] Figure 3 is a structural schematic diagram of the cooking utensil shown in Figure 2 from a second perspective;

[0031] Figure 4 is a structural schematic diagram of the cooking utensil shown in Figure 2 from a third-person perspective;

[0032] Figure 5 is a cross-sectional view of section AA in the cooking appliance shown in Figure 4 (the thick black arrow in the figure indicates the direction of airflow).

[0033] Figure 6 is an enlarged structural schematic diagram of part B of the structure shown in Figure 5;

[0034] Figure 7 is an exploded structural diagram of the hot air component in the cooking appliance shown in Figure 2;

[0035] Figure 8 is a schematic diagram of the structure of the guide plate in the hot air assembly shown in Figure 7 (showing one side of the guide plate facing the top plate of the cooking cavity, where the thick arrow lines in the figure indicate the rotation direction of the impeller);

[0036] Figure 9 is a structural schematic diagram of the baffle plate shown in Figure 8 when it is in a second view (showing the side of the baffle plate facing the top plate of the cooking cavity);

[0037] Figure 10 is a structural schematic diagram of the baffle plate shown in Figure 8 when it is in a third-person view (showing the side of the baffle plate away from the top plate of the cooking cavity);

[0038] Figure 11 is a schematic diagram of the structure of the top plate of the cooking cavity shown in Figure 3 (showing the side of the top plate facing the cooking cavity);

[0039] Figure 12 is a structural schematic diagram of the top plate shown in Figure 11 from a second perspective (showing the side of the top plate away from the cooking cavity);

[0040] Figure 13 is a structural schematic diagram of the top plate shown in Figure 11 from a third-person perspective.

[0041] The reference numerals in the accompanying drawings are as follows: 100, cooking appliance; 10, housing; 11, cooking cavity; 12, front panel; 121, loading / unloading port; 13, rear panel; 14, top panel; 141, air outlet area; 1411, air outlet hole; 142, air inlet area; 1421, air inlet hole; 20, door; 30, hot air assembly; 31, heat insulation cover; 32, driving component; 33, guide plate; 331, cavity; 3311, first part; 3312, second part; 3313, convex structure; 3314, arc-shaped wall; 3315, recessed structure; 332, mounting hole; 34, impeller; 35, heating element; 36, heating cavity; a, first distance; b, second distance; L, first preset distance; D, second preset distance; X, first direction; Y, second direction. Exemplary embodiments of this application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of this application are shown in the accompanying drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of this application and to fully convey the scope of this application to those skilled in the art.

[0042] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0043] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0044] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations.

[0045] As shown in Figures 1 to 13, according to an embodiment of this application, a cooking appliance 100 is proposed. The cooking appliance 100 includes a housing 10, a door 20, and a hot air assembly 30. A cooking cavity 11 is provided inside the housing 10. The door 20 and the hot air assembly 30 are respectively installed on the housing 10. The door 20 is used to open or close the cooking cavity 11, and the hot air assembly 30 heats the cooking cavity 11 so that the food placed in the cooking cavity 11 is heated and cooked.

[0046] The hot air assembly 30 includes an impeller 34, a heating element 35, a driving element 32, and a guide plate 33. The cooking cavity 11 is a cavity structure with a certain volume, which is used to contain food. This cavity structure includes a top plate 14, which is located at the top of the cooking cavity 11. An air outlet area 141 and an air inlet area 142 are respectively opened on the top plate 14. A baffle plate 33 is disposed on the outside of the cooking cavity 11 and surrounds the heating cavity 36 on the side of the top plate 14 opposite to the cooking cavity 11. The air outlet area 141 and the air inlet area 142 are respectively connected to the heating cavity 36. The impeller 34 is disposed in the heating cavity 36 and can rotate relative to the heating cavity 36. The rotation axis of the top plate 14 is perpendicular to the rotation axis of the impeller 34. The drive component 32 is disposed on the outside of the heating cavity 36. The drive component 32 includes a rotating shaft. The rotating shaft passes through the baffle plate 33 into the heating cavity 36. The part of the rotating shaft located in the heating cavity 36 is connected to the impeller 34. The heating element 35 is installed in the heating cavity 36. The position of the heating element 35 is located between the air inlet area 142 and the impeller 34.

[0047] Driven by the drive unit 32, the impeller 34 rotates relative to the heating chamber 36. The impeller 34 drives the airflow from the cooking chamber 11 to enter the heating chamber 36 through the air outlet area 141. The airflow entering the heating chamber 36 flows within the heating chamber 36. When the airflow flowing within the heating chamber 36 passes through the heating element 35, it is heated by the heating element 35. The heated airflow then flows into the cooking chamber 11 through the air inlet area 142.

[0048] In this application, the air inlet area 142 is located further away from the door 20 than the air outlet area 141, meaning the distance between the air inlet area 142 and the door 20 is greater than the distance between the air outlet area 141 and the door 20.

[0049] According to the cooking appliance 100 of this application, when the hot air assembly 30 is in use, the heating element 35 operates, and the driving element 32 drives the impeller 34 to rotate in the heating chamber 36, so that the air in the cooking chamber 11 enters the heating chamber 36 through the air outlet area 141 and flows in the direction of the air inlet area 142. When the airflow passes through the heating element 35, the heating element 35 heats the passing airflow to form a high-temperature airflow. The high-temperature airflow enters the cooking chamber 11 through the air inlet area 142, and the high-temperature airflow entering the cooking chamber 11 heats and cooks the food in the cooking chamber 11.

[0050] Since the air intake area 142 is located further away from the door body 20 than the air outlet area 141, the impact of high-temperature airflow on the door body 20 can be reduced, thereby reducing the temperature rise of the door body 20 and thus reducing the problem of excessive temperature rise of the door body 20. This reduces the possibility of users being burned by excessive temperature rise of the door body 20.

[0051] It should be noted that in this application, the housing 10 includes a cavity assembly and an outer shell. The cavity assembly forms a cooking cavity 11 by enclosing multiple plates. The outer shell is arranged around the outside of the cavity assembly. The outer shell and at least part of the outer peripheral surface of the cavity assembly are spaced apart. The space between the outer shell and the cavity assembly forms a receiving space. The hot air assembly 30 is disposed in the receiving space. The receiving space isolates the hot air assembly 30 from the outside, thereby reducing the adverse effects caused by the external placement of the hot air assembly 30 (such as scalding users or furniture).

[0052] In addition, in this application, the rotation axis of the impeller 34 is set perpendicular to the top plate 14. The impeller 34 is a centrifugal structure, that is, the impeller 34 has axial air intake and radial air exhaust. By setting the impeller 34 as a centrifugal structure, the size of the impeller 34 can be reduced on the side perpendicular to the top plate 14, thereby reducing the size of the hot air assembly 30.

[0053] In addition, the drive element 32 can be an electric motor or a motor. In this application, the drive element 32 is an electric motor. The structure of an electric motor is simple and can effectively reduce the manufacturing cost of the cooking appliance 100.

[0054] In some embodiments of this application, as shown in Figures 5 to 10, a cavity 331 is formed on the guide plate 33 by pressing. This cavity has an opening. The guide plate 33 abuts against the top plate 14 on the side away from the cooking cavity 11. The opening of the cavity 331 is closed by the top plate 14. The space enclosed by the top plate 14 and the cavity 331 is the heating cavity 36. Along the second direction Y, the heating cavity 36 includes a first part 3311 and a second part 3312 that are interconnected. The first part 3311 is located close to the door 20, and the second part 3312 is located away from the door 20.

[0055] At least a portion of the impeller 34 is disposed inside the first part 3311. The air outlet area 141 is connected to the first part 3311, and the air inlet area 142 is connected to the second part 3312. The heating element 35 is disposed inside the second part 3312 and is located between the air outlet area 141 and the air inlet area 142. The impeller 34 has a rotation direction. Along the rotation direction, the sidewall of the first part 3311 has a gradually expanding structure, that is, along the rotation direction, the distance between the impeller 34 and the sidewall of the first part 3311 increases progressively.

[0056] Specifically, in this application, the impeller 34 is a centrifugal structure, that is, the impeller 34 draws in air axially and discharges air radially. By setting the first part 3311, the first part 3311 can form a volute structure. When the impeller 34 rotates in the first part 3311, it can draw the airflow in the cooking chamber 11 from the air outlet area 141 and throw it out radially through the impeller 34. It is then output to the second part 3312 through the space between the impeller 34 and the side wall of the first part 3311. When the airflow passes through the heating element 35, the heating element 35 heats the airflow. The heated airflow enters the cooking chamber 11 through the air outlet area 141 to heat and cook the food in the cooking chamber 11.

[0057] By configuring the cavity 331, the first part 3311 of the cavity 331 forms a volute structure, and at least part of the impeller 34 of the centrifugal structure is disposed in the volute structure, thereby improving the adsorption force on the airflow, so that the airflow in the cooking cavity 11 can be quickly drawn into the heating cavity 36, and after being heated, it is sent into the cooking cavity 11 through the air outlet, thereby improving the power conversion efficiency of the drive component 32 and effectively improving the cooking efficiency.

[0058] It should be understood that in this application, the box 10 is a rectangular structure, which has length, width and height.

[0059] When the user faces the cooking appliance 100, the side of the cabinet 10 facing the user is the front side, the side of the cabinet 10 away from the user is the rear side, the side of the cabinet 10 to the user's left is the left side, the side of the cabinet 10 to the user's right is the right side, the side of the cabinet 10 facing the supporting surface is the bottom side, and the side of the cabinet 10 away from the supporting surface is the top side. The left and right sides of the cabinet 10 are arranged in the length direction of the cabinet 10, the front and rear sides of the cabinet 10 are arranged in the width direction, and the top and bottom sides of the cabinet 10 are arranged in the height direction.

[0060] In addition, in this application, the second direction Y is consistent with the width direction of the box 10.

[0061] It should be noted that the connection between the guide plate 33 and the top plate 14 can be made by means including but not limited to bonding, welding, snap-fitting, or connection via connectors.

[0062] In some embodiments of this application, as shown in FIG8, in the cavity 331 of the guide plate 33, the first part 3311 and the second part 3312 are arranged sequentially along the second direction Y. The first part 3311 is arranged on the side closer to the door body 20, and the second part 3312 is arranged on the side away from the door body 20.

[0063] The first part 3311 has a sidewall, which is an arc-shaped wall 3314. In the first direction X (the first direction X is consistent with the length direction of the housing 10), it has a first side and a second side. The distance between the first side of the arc-shaped wall 3314 and the rotation axis of the impeller 34 is a first distance a, and the distance between the second side of the arc-shaped wall 3314 and the rotation axis of the impeller 34 is a second distance b. The second distance b is greater than the first distance a, and there is a ratio between the second distance b and the first distance a. The value of the ratio is in the range of 1 to 1.5.

[0064] By controlling the ratio of the first distance a to the second distance b, the driving ability of the impeller 34 to the airflow can be effectively improved, thereby effectively controlling the heating time of the food by the hot air assembly 30.

[0065] It should be noted that, in this application, the ratio of the second distance b to the first distance a can specifically be 1, 1.05, 1.08, 1.2, 1.25, 1.3, 1.35, 1.4, 1.45, or 1.5.

[0066] The following is a detailed explanation using specific experimental data:

[0067] During the experiment, the ratio of the second distance b to the first distance a was adjusted, and the time was recorded when the temperature inside the cooking cavity 11 reached 200℃. See Table 1 for details.

[0068] Table 1

[0069] As can be seen from the above embodiments, when the value of b / a approaches 1.08, the heating rate of the cooking cavity 11 is the fastest. Therefore, by reasonably controlling the value of b / a, the heating time of the cooking cavity 11 can be effectively shortened, thereby improving the cooking rate.

[0070] In some embodiments of this application, as shown in FIG8, in the cavity 331 of the guide plate 33, a first part 3311 and a second part 3312 are arranged sequentially along the second direction Y. The first part 3311 is disposed on the side closer to the door body 20, and the second part 3312 is disposed on the side away from the door body 20. Along the second direction Y, the side of the first part 3311 facing the second part 3312 is the first connecting end, and the side of the second part 3312 facing the first part 3311 is the second connecting end. The first connecting end and the second connecting end are connected to form the complete sidewall structure of the cavity 331.

[0071] Wherein, along the first direction X, the size of the second connecting end is larger than the size of the first connecting end, and along the first direction X, at least one side of the first connecting end has a flared structure so that the first connecting end and the second connecting end can be effectively connected.

[0072] The first part 3311 of the cavity 331 forms a volute structure. By setting the first connecting end as a flared structure, the airflow can diffuse when it enters the second part 3312 through the first part 3311, thereby increasing the contact area between the airflow and the heating element 35, so that the airflow can be heated quickly and the uniformity of the airflow temperature is improved. In turn, the temperature uniformity of the high-temperature airflow entering the cooking cavity 11 is effectively improved, thereby improving the cooking quality of the food.

[0073] In addition, by setting the first connection end as a flared structure, the reverse flow of air into the first part 3311 can be reduced, and the airflow can be effectively made to flow from the first part 3311 to the second part 3312, thereby improving the directionality of the airflow drive.

[0074] As shown in Figures 8 to 10, along the first direction X, one side of the first connecting end (one side of the second dimension of the arc-shaped wall 3314) is flush with one side of the second connecting end, and the other side of the first connecting end (one side of the first dimension of the arc-shaped wall 3314) is connected to the other side of the second connecting end through a transition wall (arc structure).

[0075] In some embodiments of this application, as shown in FIG5, an air outlet area 141 and an air inlet area 142 are respectively provided on the top plate 14 of the cooking cavity 11. The air outlet area 141 is located close to the door 20, and the air inlet area 142 is located away from the door 20. The guide plate 33 and the top plate 14 together form a heating cavity 36. The impeller 34 is rotatably disposed in the heating cavity 36. The rotation axis of the impeller 34 is perpendicular to the top plate 14 and passes through the center of the air outlet area 141. The heating element 35 is disposed in the heating cavity 36 and is located between the air outlet area 141 and the air inlet area 142.

[0076] The rotation axis of the impeller 34 is set to pass through the center of the air outlet area 141, so that the impeller 34 is directly facing the air outlet area 141. The impeller 34 is a centrifugal structure with axial air intake and radial air outlet. By setting the position of the impeller 34, the distance between the air inlet area 142 and the impeller 34 can be shortened, thereby increasing the distance of the cooking cavity 11 from the air outlet area 141 to the impeller 34, thus improving the air outlet efficiency of the cooking cavity 11, and thereby improving the heating efficiency of the hot air assembly 30 on the cooking cavity 11.

[0077] It should be noted that the impeller 34 has a projection on the top plate 14, and the area of ​​the air outlet region 141 can be less than, equal to, or greater than the projected area. In this application, the area of ​​the air outlet region 141 is slightly smaller than the projected area of ​​the impeller 34 on the top plate 14, making the structure of the air outlet region 141 more compatible with that of the impeller 34, thereby effectively improving the air outlet efficiency.

[0078] In some embodiments of this application, as shown in FIG10, a profile is provided on the side of the guide plate 33 away from the top plate 14. The profile is a recessed structure 3315. The drive member 32 is installed on the side of the guide plate 33 away from the top plate 14, and at least a portion of the body of the drive member 32 is housed inside the recessed structure 3315.

[0079] By setting the recessed structure 3315, the drive component 32 can be accommodated in the recessed structure 3315, making the structure of the hot air assembly 30 more compact in the height direction of the housing 10, realizing the ultra-thin structure of the hot air assembly 30, thereby reducing the space occupied inside the housing 10 and improving the space utilization of the housing 10.

[0080] It should be noted that in this application, the hot air assembly 30 also includes a heat insulation cover 31. The heat insulation cover 31 is disposed on the side of the guide plate 33 away from the top plate 14, and the heat insulation cover 31 covers the outside of the heat insulation cover 31. The heat insulation cover 31 is used to insulate the guide plate 33, thereby reducing the heat released by the heating chamber 36 to the outside through the guide plate 33, reducing heat loss, and reducing the occurrence of excessive temperature rise on the outer surface of the housing 10 due to heat release.

[0081] Furthermore, the structure of the heat shield 31 is adapted to the structure of the guide plate 33. The drive component 32 is located on the side of the heat shield 31 opposite to the guide plate 33. The shaft of the drive component 32 passes through the heat shield 31 and the guide plate 33 in sequence and is connected to the impeller 34. At the location of the recessed structure 3315, the heat shield 31 is also provided with a recessed portion consistent with the recessed structure 3315. The recessed portion is housed within the recessed structure 3315, and part of the drive component 32 is housed within the recessed portion, thereby realizing a nested structure of multiple components, which makes the structure compact and reduces the overall structural volume.

[0082] In addition, the size of the heat insulation cover 31 is greater than or equal to the size of the guide plate 33. The heat insulation cover 31 is connected and fixed to the side of the top plate 14 away from the cooking cavity 11. The connection and fixing methods include, but are not limited to, bonding, snap-fitting, or connection via connectors.

[0083] In some embodiments of this application, as shown in Figures 8 and 9, the guide plate 33 has a recessed structure 3315 on the side facing away from the top plate 14. The recessed structure 3315 is formed by pressing on the guide plate 33, which forms a convex hull structure 3313 on the side of the guide plate 33 facing the top plate 14. A receiving groove is provided on the side of the impeller 34 facing the guide plate 33. When the impeller 34 is connected to the drive member 32, at least a part of the body of the convex hull structure 3313 is embedded in the receiving groove (the convex hull structure 3313 does not interfere with the rotation of the impeller 34).

[0084] By embedding the convex hull structure 3313 into the receiving groove of the impeller 34, the hot air assembly 30 is further nested, thereby improving the structural compactness of the hot air assembly 30 and reducing the overall size of the hot air assembly 30 in the height direction of the housing 10. This allows the hot air assembly 30 to be set in an ultra-thin manner, reducing the installation space occupied by the hot air assembly 30 in the housing 10 and effectively improving the space utilization of the housing 10.

[0085] It should be noted that in this application, a recessed molding is provided on the side of the top plate 14 of the cooking cavity 11 facing the impeller 34. The recessed molding causes the top plate 14 to protrude into the cooking cavity 11 on the side facing the cooking cavity 11. At least a part of the impeller 34 is housed in the recessed molding. The recessed molding is used to house the impeller 34, so that the hot air assembly 30 and the top plate 14 form a nested structure, which further makes the structure of the hot air assembly 30 more compact in the height direction of the housing 10.

[0086] In addition, the concave pressing on one side of the cooking cavity 11 of the top plate 14 forms a convex humb with a rounded surface. The air outlet area 141 is disposed on the convex humb. The convex humb with a rounded surface can reduce the obstruction of airflow when it enters the heating cavity 36 through the air outlet area 141, thereby improving the smoothness of airflow. At the same time, the convex humb can increase the extension area of ​​the air outlet area 141, thereby increasing the air volume.

[0087] In some embodiments of this application, as shown in FIG8, in the cavity 331 of the guide plate 33, a first portion 3311 and a second portion 3312 are arranged sequentially along the second direction Y. The first portion 3311 is arranged on the side closer to the door body 20, and the second portion 3312 is arranged on the side away from the door body 20. The heating element 35 includes a heating tube, and the number of heating tubes is at least one, wherein the extending direction of the heating tube is consistent with the first direction X.

[0088] When the hot air assembly 30 is running, the airflow in the heating chamber 36 flows from the first part 3311 to the second part 3312. By setting the extension direction of the heating tube to be along the first direction X, the airflow can fully contact the airflow, thereby increasing the contact area with the airflow and improving the uniformity of airflow heating.

[0089] It should be noted that, as shown in Figures 8 to 10, two mounting holes 332 are provided on the guide plate 33. The two mounting holes 332 are arranged opposite to each other. One end of the heating tube passes through one mounting hole 332, and the other end of the heating tube passes through the other mounting hole 332. The heating part of the heating tube is located in the heating chamber 36.

[0090] In addition, both ends of the heating element are also installed through the heat insulation cover 31, and both ends of the heating element are fixed to the heat insulation cover 31 by fixing seats.

[0091] Furthermore, the number of heating elements can be one, two, three, four, five, six, seven, or eight, etc. The heating elements can be graphene heating elements or resistance wire heating elements, etc.

[0092] In some embodiments of this application, as shown in FIG5, the heating element 35 includes at least two heating tubes, and all heating tubes are arranged along the second direction Y.

[0093] By setting multiple heating elements, the heating efficiency of the airflow is improved. At the same time, multiple heating elements can further improve the uniformity of heating the airflow, thus effectively enhancing the cooking effect of food.

[0094] In some embodiments of this application, as shown in Figures 1 to 5, the housing 10 includes a front panel 12 with a loading / unloading opening 121. The cooking cavity 11 is connected to the outside through the loading / unloading opening 121, allowing the user to load or unload food within the cooking cavity 11. A door 20 is mounted on the front panel 12 and is pivotable relative to the front panel 12. This pivoting motion opens or closes the loading / unloading opening 121 of the front panel 12.

[0095] As shown in Figure 8, along the second direction Y, the air inlet area 142 and the air outlet area 141 are arranged alternately. The air inlet area 142 is located closer to the door body 20 (i.e., the air inlet area 142 is located closer to the front panel 12), and the air outlet area 141 is located further away from the door body 20 (i.e., the air outlet area 141 is located further away from the front panel 12). The minimum distance between the heating element and the front panel 12 is a first preset distance L, and the value of the first preset distance L is in the range of 150 mm to 190 mm.

[0096] By controlling the first preset distance L, a sufficient distance can be maintained between the heating element and the door 20, thereby reducing the amount of heat radiated from the heating element to the door 20 and lowering the temperature rise of the door 20.

[0097] It should be noted that the first preset distance L can be 150 mm, 160 mm, 170 mm, 180 mm, or 190 mm.

[0098] The following is a detailed explanation using specific experimental data:

[0099] During the experiment, the first preset distance L was adjusted, and the temperature of the door 20 was detected, as detailed in Table 2:

[0100] Table 2

[0101] As can be seen from the above embodiments, the larger the value of L, the lower the temperature of the door body 20. Therefore, by taking a reasonable value of L, the temperature rise of the door body 20 can be effectively reduced.

[0102] In some embodiments of this application, as shown in Figures 2 to 5 and Figure 8, the housing 10 also includes a rear plate 13. Along the second direction Y, the rear plate 13 is parallel to and spaced apart from the front plate 12. The rear plate 13 and the air inlet area 142 have a second preset distance D, wherein the value of the second preset distance D is in the range of 0 mm to 25 mm.

[0103] When the hot air assembly 30 is running, the high-temperature airflow in the heating chamber 36 enters the cooking chamber 11 from top to bottom through the air inlet area 142. The air inlet area 142 is positioned close to the rear plate 13 so that the high-temperature airflow can form the Coanda effect, that is, part of the high-temperature airflow is guided along the rear plate 13 to the bottom, thereby enabling the production of large-volume cakes (such as chiffon cakes).

[0104] It should be noted that the first preset distance L can be 0 mm, 5 mm, 10 mm, 15 mm, 16 mm, 20 mm, or 25 mm.

[0105] The following is a detailed explanation using specific experimental data:

[0106] During the experiment, taking cake cooking as an example, the second preset distance D was adjusted, and the temperature difference between the top and bottom of the cake was measured. See Table 3 for details.

[0107] Table 3

[0108] As can be seen from the above examples, the smaller the value of D, the smaller the temperature difference between the top and bottom of the cake. Therefore, by taking a reasonable value for D, the temperature difference between the top and bottom of the cake can be effectively reduced.

[0109] In addition, as shown in Figure 11, openings can also be made on the top plate 14 at the locations where air inlet area 142 and air outlet area 141 are to be opened. The openings can be used as air inlets or air outlets.

[0110] In some embodiments of this application, as shown in Figures 11 and 12, the air outlet area 141 includes a plurality of air outlet holes 1411 evenly distributed in the air outlet area 141. By providing a plurality of air outlet holes 1411, the air outlet area 141 can have a sufficient air outlet area to increase the airflow rate. In addition, the evenly distributed plurality of air outlet holes 1411 can improve the uniformity of the airflow.

[0111] It should be noted that, in this application, the shape of the air outlet 1411 includes, but is not limited to, a circle, an ellipse, or a polygon.

[0112] In some embodiments of this application, as shown in Figures 11 and 12, the air inlet area 142 includes a plurality of air inlet holes 1421 evenly distributed in the air inlet area 142. By providing a plurality of air inlet holes 1421, the air inlet area 142 can have a sufficient air inlet area to increase the airflow rate. In addition, the evenly distributed plurality of air inlet holes 1421 can improve the uniformity of the airflow.

[0113] It should be noted that, in this application, the shape of the air inlet 1421 includes, but is not limited to, a circle, an ellipse, or a polygon.

[0114] The aforementioned cooking appliance can be an oven or a cooking appliance with a microwave cooking function. In this application, the cooking appliance is a cooking appliance with a microwave cooking function. The structure of other parts of this microwave cooking appliance can be found in existing technology and will not be repeated here. The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A cooking appliance, wherein, The cooking appliance includes: The cabinet includes a cooking cavity, and the top plate of the cooking cavity is provided with an air inlet area and an air outlet area; A door, which is connected to the housing and is used to open or close the cooking cavity, wherein the air inlet area is located further away from the door than the air outlet area; A hot air assembly includes a guide plate, an impeller, a drive unit, and a heating element. The guide plate is located on the side of the top plate opposite to the cooking cavity and surrounds the heating cavity with the top plate. The air inlet area and the air outlet area are respectively connected to the heating cavity. The impeller is rotatably disposed in the heating cavity to drive airflow from the air outlet area to the air inlet area. The rotation axis of the impeller is perpendicular to the top plate. The drive unit is located on the outside of the heating cavity. The rotation shaft of the drive unit passes through the guide plate and is connected to the impeller. The heating element is disposed in the heating cavity and located between the impeller and the air inlet area.

2. The cooking appliance of claim 1, wherein, The guide plate includes a cavity with an opening. The top plate closes the opening and surrounds the heating cavity with the cavity. The cavity includes a first part and a second part connected together. The first part is connected to the air outlet area. At least part of the impeller is disposed in the first part. Along the rotation direction of the impeller, the distance between the side wall of the first part and the impeller increases progressively. The second part is connected to the air inlet area. The heating element is disposed in the second part.

3. The cooking appliance of claim 2, wherein, The sidewall of the first part is an arc-shaped wall. Along the first direction, there is a first distance between the rotation axis of the impeller and the first side of the arc-shaped wall, and a second distance between the rotation axis of the impeller and the second side of the arc-shaped wall. The ratio of the second distance to the first distance is in the range of 1 to 1.

5. The first direction is consistent with the length direction of the housing.

4. The cooking appliance of claim 3, wherein, The first part has a first connecting end on the side facing the second part, and the first connecting end has a flared structure. The second part has a second connecting end on the side facing the first part, and the second connecting end is connected to the first connecting end.

5. The cooking appliance of claim 2, wherein, The axis of rotation of the impeller passes through the center of the air outlet area.

6. The cooking appliance of claim 1, wherein, The guide plate has a recessed structure on the side opposite to the heating cavity, and at least part of the driving component is housed in the recessed structure.

7. The cooking appliance of claim 6, wherein, The recessed structure forms a convex structure on the side of the guide plate facing the top plate, and the impeller is provided with a receiving groove, at least part of the convex structure is received in the receiving groove.

8. The cooking appliance of claim 1, wherein, The heating element includes at least one heating tube, which extends along a first direction, wherein the first direction is consistent with the length direction of the housing.

9. The cooking appliance of claim 8, wherein, The number of heating elements is at least two, and all heating elements are arranged along a second direction, wherein the second direction is consistent with the width direction of the housing.

10. The cooking appliance of claim 8, wherein, The housing also includes a front panel with a loading / unloading opening that communicates with the cooking cavity for users to load or unload food within the cooking cavity. A door is pivotally connected to the front panel and is used to open or close the loading / unloading opening. The air inlet area is located further away from the front panel than the air outlet area. The minimum distance between the front panel and the heating element is in the range of 150 mm to 190 mm.

11. The cooking appliance of claim 10, wherein, The enclosure also includes a rear panel, which is spaced apart from the front panel in a second direction. The air inlet area is located closer to the door than the air outlet area. The distance between the air inlet area and the rear panel is in the range of 0 mm to 25 mm. The second direction is consistent with the width direction of the enclosure.

12. The cooking appliance of any one of claims 1 to 11, wherein, The air outlet area includes multiple air outlets, which are evenly distributed within the air outlet area. And / or, the air intake area includes a plurality of air intake holes, which are evenly distributed within the air intake area.

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