Handle heat dissipation structure and cooking equipment

Abstract

The utility model provides a handle heat dissipation structure and cooking equipment, cooking equipment includes panel subassembly, shell, fan component and door subassembly, fan component sets up in the shell, is provided with handle on the position of door subassembly near upper side, forms the ventilating air duct between panel subassembly and door subassembly, ventilating air duct communicates with the chamber of fan component, ventilating air duct can introduce the part cooling airflow that fan component blows into door subassembly, carries out heat dissipation to handle. The utility model discloses the setting of ventilating air duct between panel subassembly and door body subassembly, can introduce the cooling airflow that fan component blows in door frame and handle between partially, thereby forms the air heat insulation layer between two, along with the flow of cooling airflow in ventilating air duct, can effectively heat dissipation to handle, in addition, the speed of cooling airflow that fan component blows is much higher than air convection speed, thereby has improved the heat dissipation efficiency of handle significantly, has reduced the handle temperature effectively.

Description

Technical Field

[0001] This utility model relates to the field of cooking equipment technology, and more specifically, to a handle heat dissipation structure and a cooking device. Background Technology

[0002] In cooking equipment, especially high-end models such as microwave ovens and microwave-steam-grill combos, a trend towards integrated design that combines the oven door and handle is emerging to enhance aesthetics and novelty. This approach effectively improves the product's appearance and sophistication, achieving a minimalist, unified, and easy-to-clean design while ensuring functionality and safety. This strengthens the user's purchasing desire and gives the product a competitive edge over similar products.

[0003] However, the heating element of cooking equipment is usually placed at the top. When using the grilling function, the heat is transferred from top to bottom, which causes the upper part of the door frame to be significantly hotter than other parts of the door frame. Since pull-down concealed handles are mostly designed in the upper part of the door frame, the area where the handle is held is hot, posing a risk of burns to users when opening the door.

[0004] Application number CN202510221975.5 discloses an oven door structure for an indoor oven, including a front door panel, a first glass sealed inside the front door panel, and a handle mounted on the outer surface of the front door panel. It also includes a rear door panel assembly fixedly connected to the front door panel, on which a viewing window adapted to the first glass is mounted. A heat-insulating gap is formed between the front door panel and the rear door panel assembly. Through heat insulation by the rear door panel assembly, heat insulation by the heat-insulating gap, and convection heat dissipation between the heat-insulating gap and the outside air, the temperature of the front door panel, handle, and first glass can be effectively reduced. When the internal temperature of the oven reaches 550 degrees Fahrenheit, the temperature of the handle is only 75 degrees Fahrenheit, the temperature of the front door panel is 152 degrees Fahrenheit, and the temperature of the first glass is 172 degrees Fahrenheit. This effectively avoids the front door panel, first glass, and handle becoming too hot, thus preventing burns to the user and greatly improving the safety of oven use. This patent utilizes external air convection heat exchange, which can reduce the temperature of the door structure and handle to a certain extent. However, the handle in this patent is a component that protrudes from the door structure and is separated from the door structure by a certain distance. Its temperature is relatively low. If the handle is set as a pull-down hidden handle, the temperature of the handle will be close to the temperature of the front panel of the door, which exceeds 65 degrees Celsius. There is still a risk of being burned when the user opens the door structure. Utility Model Content

[0005] The present invention aims to provide a handle heat dissipation structure that significantly reduces the temperature of pull-down concealed handles and avoids the risk of users being burned by the handle.

[0006] This utility model discloses a handle heat dissipation structure for a cooking device. The cooking device includes a panel assembly, a housing, a fan assembly, and a door assembly. The fan assembly is disposed inside the housing. A handle is disposed on the door assembly near the upper side. A ventilation duct is formed between the panel assembly and the door assembly. The ventilation duct communicates with the chamber where the fan assembly is located. The ventilation duct can introduce part of the cooling airflow blown out by the fan assembly into the door assembly to dissipate heat from the handle.

[0007] Furthermore, a panel grille is provided on the side of the panel assembly facing the door assembly, and a door frame grille is correspondingly provided on the door assembly. Part of the cooling airflow blown out by the fan assembly passes through the panel grille and the door frame grille in sequence before entering the door assembly to cool the handle.

[0008] Furthermore, the door assembly includes at least a door frame and a handle cover. The handle is disposed on the upper side of the door frame, and the handle cover is correspondingly disposed on the rear side of the handle. The handle cover is connected to the rear side wall of the handle and the top plate of the door frame, respectively, and a hollow cavity is formed between the handle cover, the handle and the door frame. The hollow cavity is part of a ventilation duct.

[0009] Furthermore, a first air duct is provided in the door assembly. The first end of the first air duct is connected to the door frame grille, and the second end of the first air duct enters the hollow cavity formed by the handle cover, the door frame, and the handle.

[0010] Furthermore, the handle protrudes rearward at least partially, forming a groove inside the handle, with a first locking hole provided in the groove, and a corresponding first buckle provided on the handle cover, the first buckle engaging with the first locking hole.

[0011] Furthermore, a number of second latches are provided on the top plate of the door frame, and a number of second latches are correspondingly provided on the handle cover, with the second latches engaging with the second latches.

[0012] Furthermore, the door assembly also includes a door glass that covers the front side of the door frame and shields the opening of the recess, and / or the door glass shields the open opening of the first air duct located on the front side.

[0013] Furthermore, the handle is integrally formed with the door frame, and the handle is vertically higher than the handle cover to form a corresponding door opening structure.

[0014] This utility model also discloses a cooking device, including the handle heat dissipation structure described above.

[0015] The cooking device described above has the same advantages over the prior art as the handle heat dissipation structure, and will not be repeated here.

[0016] Furthermore, the cooking device also includes a rear plate, a bottom plate assembly, a transformer, a magnetron, and a cavity assembly. The outer side of the cavity assembly and the outer shell, rear plate, bottom plate assembly, and panel assembly form an installation cavity. The fan assembly, transformer, and magnetron are disposed in the installation cavity, and the cooling airflow blown out by the fan assembly passes through the transformer and magnetron before being blown toward the panel assembly.

[0017] Compared with the prior art, the handle heat dissipation structure and cooking device of this utility model have the following advantages:

[0018] By incorporating a ventilation duct between the panel assembly and the door assembly, the cooling airflow from the fan assembly within the housing can be partially introduced between the door frame and the handle, forming an air insulation layer. This layer effectively blocks heat transfer from the cooking appliance to the handle, while the airflow within the ventilation duct also dissipates heat from the handle. Furthermore, the airflow velocity from the fan assembly is significantly higher than the air convection velocity, further enhancing the handle's heat dissipation efficiency and reducing its temperature, preventing burns to the user. The handle heat dissipation structure provided by this invention is simple in design, highly efficient, and significantly improves the user experience. Attached Figure Description

[0019] Figure 1 This is a front view of the cooking equipment described in an embodiment of the present utility model;

[0020] Figure 2 This is a side view of the cooking equipment described in an embodiment of the present utility model;

[0021] Figure 3 This is a top view of the cooking equipment described in an embodiment of the present utility model;

[0022] Figure 4 This is a schematic cross-sectional view of the cooking device described in this embodiment of the present invention after removing the outer shell;

[0023] Figure 5 This is a three-dimensional structural diagram of the cooking device described in this embodiment of the present invention after the outer shell has been removed;

[0024] Figure 6 This is an exploded structural diagram of the door assembly described in an embodiment of the present invention;

[0025] Figure 7 This is a front view of the door assembly described in this embodiment of the present invention after the door glass has been removed.

[0026] Figure 8 This is a top view of the door assembly described in an embodiment of the present utility model;

[0027] Figure 9 for Figure 8 A schematic diagram of the cross-sectional structure of the AA section.

[0028] Explanation of reference numerals in the attached figures:

[0029] 100, Panel assembly; 110, Panel grille; 200, Housing; 300, Rear panel; 400, Door assembly; 410, Cover plate; 420, Door body assembly; 430, Handle cover; 431, First latch; 432, Second latch; 433, Air outlet; 440, Door frame; 441, Door frame grille; 442, First air duct; 443, Groove; 444, First latch hole; 445, Second latch hole; 446, Handle; 450, Door glass; 500, Base plate assembly; 510, Hinge assembly; 600, Fan assembly; 700, Transformer; 800, Magnetron; 900, Cavity assembly. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the described embodiments are only some, not all, of the embodiments of this utility model. The specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. It should be noted that, unless otherwise specified, the embodiments and features described in the present utility model can be combined with each other.

[0031] The following describes in detail, with reference to the accompanying drawings, a handle heat dissipation structure and a cooking device according to an embodiment of the present invention.

[0032] Example 1

[0033] This embodiment provides a handle heat dissipation structure, such as Figures 1-9 As shown, a cooking device is used, which includes a panel assembly 100, a housing 200, a fan assembly 600, and a door assembly 400. The fan assembly 600 is disposed inside the housing 200. A handle 446 is provided on the door assembly 400 near the upper side. A ventilation duct is formed between the panel assembly 100 and the door assembly 400. The ventilation duct communicates with the chamber where the fan assembly 600 is located. The ventilation duct can introduce part of the cooling airflow blown out by the fan assembly 600 into the door assembly 400 to dissipate heat from the handle 446.

[0034] The handle 446 is a pull-down concealed handle. For the door assembly 400 with the pull-down concealed handle, the ventilation duct allows part of the coolant blown out by the fan assembly 600 to be introduced into the door assembly 400 to dissipate heat from the handle 446. On the one hand, a corresponding isolation layer is formed between the handle 446 and the door assembly 400, thereby blocking the heat transfer inside the cooking device to a certain extent. On the other hand, the cooling airflow significantly improves the heat dissipation efficiency. Through the above two effects, the surface temperature of the handle 446 can be effectively reduced, preventing users from being burned when touching the handle 446, and significantly improving the user experience.

[0035] Specifically, such as Figure 4 , Figure 5 As shown, a panel grille 110 is provided on the side of the panel assembly 100 facing the door assembly 400, and a corresponding door frame grille 441 is provided on the door assembly 400. Part of the cooling airflow blown out by the fan assembly 600 passes through the panel grille 110 and the door frame grille 441 before entering the door assembly 400 to cool the handle 446. In the prior art, the fan assembly 600 is typically used to cool the magnetron 800, transformer 700, and components on the panel assembly 100 in cooking equipment. Therefore, the cooling airflow blown out by the fan assembly 600 can itself be delivered to the panel assembly 100. In this case, the airflow can be easily delivered to the door assembly 400 to dissipate heat from the handle 446 through the panel grille 110 and the door frame grille 441. The airflow structure is simple, the airflow path is short, and the heat dissipation efficiency is high. Preferably, the panel grille 110 and the door frame grille 441 are located near the upper part of the panel assembly 100 and the door assembly 400. This arrangement allows the airflow to enter the door assembly 400 closer to the top of the door assembly 400 and also closer to the handle 446, making it easier to set up the corresponding air duct.

[0036] In this example, the door assembly 400 includes at least a door frame 440, a handle cover 430, and a door glass 450. The handle 446 is disposed on the upper side of the door frame 440, and the handle cover 430 is correspondingly disposed on the rear side of the handle 446. The door glass 450 covers the front side of the door frame 440. The handle cover 430 is connected to the rear side wall of the handle 446 and the top plate of the door frame 440, and a hollow cavity is formed between the handle cover 430, the handle 446, and the door frame 440. The hollow cavity is part of a ventilation duct. Through the above arrangement, the cooling airflow blown by the fan assembly 600 can flow through the hollow cavity, which isolates the handle 446 from the cavity assembly 900 and the part of the door frame 440 near the cavity assembly 900, preventing the heat generated by the cavity assembly 900 during cooking from being transferred to the handle 446, thereby effectively reducing the temperature of the handle 446 and preventing the user from being burned when touching the handle 446.

[0037] As one alternative example, the handle 446 is integrally formed with the door frame 440. This arrangement improves the integration and mechanical performance of the door assembly 400, while also conforming to the design concept of integrated pull-down concealed handles in the prior art, simplifying production and enhancing the product's aesthetics.

[0038] Specifically, the handle 446 is vertically higher than the handle cover 430 to form a corresponding door opening structure. This arrangement ensures that the handle 446 maintains a certain height above the handle cover 430, thus creating a door opening structure between the handle 446 and the handle cover 430, providing sufficient operating space for the user's fingers. Specifically, when opening the door, the user's fingers can simultaneously contact the rear wall of the handle 446 and the top of the handle cover 430, increasing the force application area and facilitating safe operation. Furthermore, the raised design of the handle cover 430 makes it a more prominent marker, allowing users to visually identify the corresponding door opening area and preventing misoperation due to a lack of understanding of the structure, thus improving the user experience. Preferably, in the left-right direction, the handle 446 and handle cover 430 are located near the top center of the door frame 440, a configuration that also satisfies customers' habits regarding conventional door opening positions.

[0039] Specifically, let H1 be the vertical distance between the top of the handle cover 430 and the top of the door frame 440, and let H2 be the distance between the top of the handle cover 430 and the top of the handle 446. Then H2 > H1, and preferably, the ratio of H1 to H2 is 0.3 to 0.5. This setting ensures that a certain height is still maintained at the top of the handle cover 430 to provide the user's fingers with appropriate operating space, and also ensures that there is a certain space between the handle cover 430 and the door frame 440, thereby ensuring the ventilation volume of the ventilation duct.

[0040] Specifically, such as Figure 6 , Figure 8As shown, the handle 446 protrudes at least partially rearward, and a groove 443 is formed inside the handle 446. A first locking hole 444 is provided in the groove 443, and a corresponding first buckle 431 is provided on the handle cover 430. The first buckle 431 engages with the first locking hole 444. When the door glass 450 is connected to the door frame 440, the opening of the groove 443 is covered. Specifically, the opening of the groove 443 faces forward, and the groove 443 is recessed along the protruding direction of the handle 446. The first locking hole 444 is provided. Through the above arrangement, a receiving groove 443 is formed in the handle 446. The groove 443 can accommodate the first buckle 431 after engagement. Then, through the connection of the door glass 450 and the door frame 440, the opening of the groove 443 can be covered, thereby achieving a seamless connection between the handle cover 430 and the handle 446, significantly improving the aesthetics of the product.

[0041] Preferably, a plurality of second latching holes 445 are provided on the top plate of the door frame 440, and a plurality of second latches 432 are correspondingly provided on the handle cover 430, the second latches 432 engaging with the second latching holes 445. This arrangement ensures the stability of the connection between the handle cover 430 and the door frame 440, thereby guaranteeing the heat dissipation effect of the handle 446.

[0042] Optional, such as Figure 6 , Figure 7 , Figure 9 As shown, a first air duct 442 is provided in the door assembly 400. The first end of the first air duct 442 communicates with the door frame grille 441, and the second end of the first air duct 442 extends into the hollow cavity formed by the handle cover 430, the door frame 440, and the handle 446. It should be understood that since the handle cover 430 directly covers the top of the door frame 440, drawing air through the top of the door frame 440 would require additional structures, leading to changes in the product's appearance and increasing the number of parts. The first air duct 442 allows for the implementation of the corresponding air-drawing structure without increasing the number of parts or altering the product's appearance, making it simple and convenient. Specifically, the ventilation duct includes at least a hollow cavity, a first air duct 442, a door frame grille 441, and a panel grille 110.

[0043] Preferably, the front side of the first air duct 442 is an open structure, and when the door glass 450 is connected to the door frame 440, the door glass 450 blocks the front side of the first air duct 442. This arrangement can effectively reduce the processing difficulty of the first air duct 442 and improve the corresponding production efficiency.

[0044] Optionally, the handle cover 430 has an air outlet 433 at the end furthest from the panel assembly 100, and the air outlet 433 is connected to the external environment. This arrangement connects the first end of the ventilation duct to the chamber containing the fan assembly 600, and the second end of the ventilation duct to the external environment. In this case, the airflow after heat exchange through the ventilation duct is directly discharged to the external environment, eliminating the need for internal recirculation within the cooking equipment and further improving the heat exchange efficiency of the cooking equipment.

[0045] like Figure 4 , Figure 5 , Figure 9 As shown, the green lines and arrows indicate the direction of the cooling airflow from the fan assembly 600. With this configuration, when the cooking equipment heats food, the fan assembly 600 rotates, drawing in cold air from the rear panel 300 of the cooking equipment and driving the cold air towards the transformer 700 and / or magnetron 800 within the cooking equipment. Part of the air is discharged through the bottom plate assembly 500, while another portion reaches the panel assembly 100 and exits through the panel grille 110. It then enters the first air duct 442 through the door frame grille 441 on the door assembly 400, travels along the first air duct 442 to the cavity formed by the handle cover 430, the door frame 440, and the handle 446, and flows towards the air outlet 433. This airflow effectively removes heat accumulated below the hidden handle of the oven door, thus reducing the temperature of the handle 446 and solving the problem of the hidden pull-down handle being too hot to handle, improving the user experience. Furthermore, the pull-down hidden handle formed by the above design is not displayed on the front side of the cooking equipment. The front side of the cooking equipment is set as a whole door glass 450, which makes the overall structure beautiful and elegant, easy to clean, and significantly improves the user experience.

[0046] As another optional example, such as Figure 6 As shown, the door assembly 400 further includes a cover plate 410 and a door body assembly 420. The cover plate 410 and the door body assembly 420, together with the handle cover 430, the door frame 440, and the door glass 450, form the completed door assembly 400. Optionally, the cover plate 410 is connected to the door frame 440 via a snap-fit ​​structure, and the door body assembly 420 is locked to the door frame 440 via screws.

[0047] For details regarding the specific structure and connection relationship of the cover plate 410 and the door assembly 420, please refer to the existing technology. Since it does not involve any improvement of this utility model, it will not be described in detail here.

[0048] Specifically, the cooking device includes a base plate assembly 500, and a hinge assembly 510 is provided between the base plate assembly 500 and the door assembly 400. The door assembly 400 is rotatably connected to the base plate assembly 500 through the hinge assembly 510.

[0049] Example 2

[0050] This embodiment discloses a cooking device, which includes a handle heat dissipation structure as described in Embodiment 1.

[0051] The cooking device described herein has the same advantages over the prior art as the handle heat dissipation structure described in Example 1, and will not be repeated here.

[0052] It should be understood that the cooking equipment mentioned refers to common cooking equipment such as microwave ovens, ovens, microwave ovens, microwave-steam-grill combos, and steam ovens, and is equipped with the conventional components that it should have, which will not be further limited or described here.

[0053] As one optional example, the cooking device also includes a rear plate 300, a bottom plate assembly 500, a transformer 700, a magnetron 800, and a cavity assembly 900. The outer side of the cavity assembly 900 forms an installation cavity with the outer shell 200, the rear plate 300, the bottom plate assembly 500, and the panel assembly 100. The fan assembly 600, the transformer 700, and the magnetron 800 are disposed in the installation cavity, and the cooling airflow blown out by the fan assembly 600 passes through the transformer 700 and the magnetron 800 before being blown toward the panel assembly 100. In the prior art, the cooling airflow blown out by the fan assembly 600 is used to dissipate heat from the transformer 700, magnetron 800, and panel assembly 100. The cooled airflow is then discharged through the base plate assembly 500. In this application, through the arrangement of the panel grille 110 and the door frame grille 441, part of the cooling airflow blown out by the fan assembly 600 enters the door assembly 400 after passing through the panel grille 110 and the door frame grille 441, dissipating heat from the handle 446. This significantly reduces the temperature of the handle 446, prevents the risk of burns to the user's hands during operation, and improves the user experience.

[0054] It should be noted that all directional and positional terms used in this utility model, such as "up," "down," "left," "right," "front," "back," "vertical," "horizontal," "inner," "outer," "top," "lower," "tail end," "head end," and "center," are only used to explain the relative positional relationship and connection between components in a specific state. They are merely for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, descriptions involving "first," "second," etc., in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0055] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A handle heat dissipation structure for use in cooking equipment, characterized in that, The cooking device includes a panel assembly (100), a housing (200), a fan assembly (600), and a door assembly (400). The fan assembly (600) is disposed inside the housing (200). A handle (446) is provided on the door assembly (400) near the upper side. A ventilation duct is formed between the panel assembly (100) and the door assembly (400). The ventilation duct communicates with the chamber where the fan assembly (600) is located. The ventilation duct can introduce part of the cooling airflow blown out by the fan assembly (600) into the door assembly (400) to dissipate heat from the handle (446).

2. The handle heat dissipation structure as described in claim 1, characterized in that, A panel grille (110) is provided on the side of the panel assembly (100) facing the door assembly (400), and a door frame grille (441) is provided on the door assembly (400). Part of the cooling airflow blown out by the fan assembly (600) passes through the panel grille (110) and the door frame grille (441) in sequence and then enters the door assembly (400) to cool the handle (446).

3. The handle heat dissipation structure as described in claim 2, characterized in that, The door assembly (400) includes at least a door frame (440) and a handle cover (430). The handle (446) is disposed on the upper side of the door frame (440), and the handle cover (430) is correspondingly disposed on the rear side of the handle (446). The handle cover (430) is connected to the rear side wall of the handle (446) and the top plate of the door frame (440) respectively, and a hollow cavity is formed between the handle cover (430), the handle (446) and the door frame (440). The hollow cavity is part of the ventilation duct.

4. The handle heat dissipation structure as described in claim 3, characterized in that, A first air duct (442) is provided in the door assembly (400). The first end of the first air duct (442) is connected to the door frame grille (441), and the second end of the first air duct (442) is connected to the hollow cavity formed by the handle cover (430), the door frame (440), and the handle (446).

5. The handle heat dissipation structure as described in claim 4, characterized in that, The handle (446) is at least partially protruding rearward, and a groove (443) is formed inside the handle (446). A first locking hole (444) is provided in the groove (443), and a first buckle (431) is correspondingly provided on the handle cover (430). The first buckle (431) is engaged with the first locking hole (444).

6. The handle heat dissipation structure as described in claim 5, characterized in that, A plurality of second latches (445) are provided on the top plate of the door frame (440), and a plurality of second latches (432) are provided on the handle cover (430) respectively. The second latches (432) are connected to the second latches (445).

7. The handle heat dissipation structure as described in claim 5, characterized in that, The door assembly (400) further includes a door glass (450) that covers the front side of the door frame (440) and shields the opening of the groove (443), and / or shields the open opening of the first air duct (442) on the front side.

8. The handle heat dissipation structure as described in any one of claims 2-7, characterized in that, The handle (446) is integrally formed with the door frame (440), and the handle (446) is higher than the handle cover (430) in the vertical direction to form a corresponding door opening structure.

9. A cooking device, characterized in that, Includes the handle heat dissipation structure as described in any one of claims 1-8.

10. The cooking apparatus as described in claim 9, characterized in that, The cooking device also includes a rear plate (300), a bottom plate assembly (500), a transformer (700), a magnetron (800), and a cavity assembly (900). The outer side of the cavity assembly (900) and the outer shell (200), the rear plate (300), the bottom plate assembly (500), and the panel assembly (100) form an installation cavity. The fan assembly (600), the transformer (700), and the magnetron (800) are disposed in the installation cavity, and the cooling airflow blown out by the fan assembly (600) passes through the transformer (700) and the magnetron (800) before being blown toward the panel assembly (100).

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