Door assembly and steaming and baking cooking machine

Abstract

The door assembly comprises a shell, a display screen, a first cooling fan and a second cooling fan, the shell is provided with a mounting cavity, an air inlet hole and an air outlet hole, the air inlet hole and the air outlet hole are communicated with the mounting cavity, and the shell is further provided with a light-transmitting area located in the mounting cavity; the display screen is arranged in the installation cavity and located between the air inlet hole and the air outlet hole, the display screen is located in the light-transmitting area of the shell, and the first heat dissipation fan and the second heat dissipation fan are arranged in the air inlet hole and the air outlet hole respectively so that a heat dissipation airflow path penetrating through the display screen can be formed in the installation cavity. The heat dissipation airflow path can fully take away heat of the display screen and heat transferred to the display screen from the interior of the steaming oven, so that the heat dissipation effect on the display screen is improved, and it is ensured that the temperature rise of the display screen is within the design allowable range.

Description

Technical Field

[0001] The utility model relates to the technical field of heat dissipation of steaming and baking cooking machines, in particular to a door assembly and a steaming and baking cooking machine. Background Art

[0002] Currently, most built-in steam ovens feature a split door and display screen design, with some even integrating the screen into the oven handle. To maintain the integrity and integration of built-in kitchen appliances, the optimal design is to fully integrate the display screen and oven door. However, integrating the display screen into the oven door presents a problem. Display screens, especially high-resolution color touchscreens, incorporate numerous chips and other precision electronic components. When the oven door is operating in the baking mode, the door glass typically faces the oven's inner chamber. During this time, the maximum temperature of the inner chamber often exceeds 200°C. If the display screen integrated into the door does not dissipate heat effectively, it can easily cause the temperature to rise beyond its design tolerances. Utility Model Content

[0003] Since the display screen in the door of the existing built-in steam oven has a technical problem of insufficient heat dissipation effect, it is necessary to provide a door assembly and a steam oven cooking machine.

[0004] Door assembly, including:

[0005] A housing having a mounting cavity, an air inlet and an air outlet respectively connected to the mounting cavity, and a light-transmitting area located in the mounting cavity;

[0006] a display screen, the display screen being disposed in the mounting cavity and between the air inlet and the air outlet, the display screen being located in a light-transmitting area of ​​the housing; and

[0007] A first heat dissipation fan and a second heat dissipation fan are respectively located at the air inlet and the air outlet to form a heat dissipation airflow path that passes through the display screen in the installation cavity.

[0008] With this arrangement, the first heat dissipation fan is used to introduce cold air from the air inlet and create a disturbance to the air in the installation cavity, and the second heat dissipation fan is used to discharge the hot air that has absorbed the heat of the display screen from the air outlet in a timely manner to avoid heat accumulation in the installation cavity. The heat dissipation airflow path formed in this way can pass through the display screen and fully take away the heat of the display screen itself and the heat transferred to the display screen from the inside of the steam oven, thereby improving the heat dissipation effect of the display screen and ensuring that the temperature rise of the display screen is within the design allowable range.

[0009] In one embodiment, the shell includes a door frame and an outer plate and an inner plate respectively installed on both sides of the door frame along the thickness direction of the door frame to form the installation cavity, and the light-transmitting area is located on the outer plate.

[0010] With this arrangement, the shell structure has high strength, the shape of the installation cavity is stable, and it is convenient to install a flat-panel display screen.

[0011] In one embodiment, the door frame includes a top frame beam, a pair of frame columns spaced apart at both ends of the top frame beam, and a partition beam spaced apart from the top frame beam;

[0012] The two ends of the partition beam are respectively installed in the middle of the two frame columns to form a buffer cavity connected to the outside together with the outer plate, the inner plate and the two frame columns. The air inlet and the air outlet are respectively located on the partition beam for connecting the installation cavity and the buffer cavity.

[0013] In this way, the buffer cavity ensures the stability of the heat dissipation airflow path and is also conducive to reducing water droplets from entering the installation cavity.

[0014] In one embodiment, the display screen is spaced apart from the inner panel, and the display screen is attached to the outer panel;

[0015] The first cooling fan and the second cooling fan are respectively turbine cooling fans, the air intake of the first cooling fan is toward the outer panel and the air outlet is toward the display screen, and the air intake of the second cooling fan is toward the inner panel and the air outlet is toward the air outlet.

[0016] This arrangement optimizes the heat dissipation path within the installation cavity, especially at the air inlet and outlet holes, avoiding heat accumulation caused by hot air rotating around the two openings.

[0017] In one embodiment, the air inlet and / or the air outlet is located on a side of the partition beam close to the outer panel.

[0018] This arrangement further reduces the impact of the heat of the inner plate on the heat dissipation airflow path in the installation cavity.

[0019] In one embodiment, the first heat dissipation fan includes a first mounting base mounted on the outer panel and a first fan body mounted on the first mounting base, and the first mounting base has a first drainage channel connected to the air intake of the first fan body and the air inlet hole.

[0020] This arrangement can not only reduce the impact of heat dissipation from the inner panel, but also lower the temperature of the outer panel with the help of cold air, thereby avoiding the problem of the outer panel being too hot and scalding the user.

[0021] In one embodiment, the second heat dissipation fan includes a second mounting base mounted on the outer panel and a second fan body mounted on the second mounting base, and the second mounting base has a second drainage channel connected to the exhaust port of the second fan body and the air outlet.

[0022] This arrangement reduces the backflow of hot air at the air outlet and avoids the problem of heat accumulation in the heat dissipation airflow path.

[0023] In one embodiment, the door assembly further includes a first guide pipe located in the buffer cavity and extending from the air inlet in a direction away from the top frame beam;

[0024] The door assembly further includes a second guide pipe located in the buffer cavity and extending from the air outlet in a direction away from the top frame beam.

[0025] This arrangement prevents the hot air discharged from the installation cavity through the air outlet from flowing back to the air inlet, thereby improving the heat dissipation effect on the display screen in the installation cavity.

[0026] In one embodiment, the first guide tube and the second guide tube are spaced apart from the inner plate.

[0027] With this arrangement, it is difficult for the heat of the inner plate to enter the installation cavity with the help of cold air, thereby improving the heat dissipation effect on the display screen in the installation cavity.

[0028] In one embodiment, the top frame beam has a snap-fit ​​groove with a notch facing downward, and the upper edge of the inner plate is snap-fitted to the snap-fit ​​groove.

[0029] Such an arrangement improves the waterproof effect of the door assembly and can prevent water from penetrating into the installation cavity from above and causing damage to the electronic components of the display screen.

[0030] The present application also provides a steaming and baking cooking machine, comprising:

[0031] Steam oven body; and

[0032] Like the door assembly mentioned above, the door assembly is installed on the steam oven main body.

[0033] This arrangement uses the first cooling fan to draw cool air from below the door assembly, removing heat from the display screen within the installation cavity. The second cooling fan then exhausts the hot air from the installation cavity, enhancing heat dissipation. The door assembly's top frame beam also features a downward-facing snap-in slot, which engages with the inner panel to provide waterproofing and protect the display screen's electronic components. Notably, the door assembly's air inlet and outlet are both facing downward, which, combined with the buffer cavity, minimizes water droplets from entering the door assembly's housing from below, achieving a splash-proof effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic structural diagram of a door assembly in one embodiment provided in the present application;

[0035] Figure 2 for Figure 1 A cross-sectional view of the mounting cavity of the door assembly shown;

[0036] Figure 3 for Figure 1 Schematic diagram of part of the structure of the middle door assembly;

[0037] Figure 4 for Figure 3 A schematic diagram of the structure of the first cooling fan;

[0038] Figure 5 for Figure 4 A schematic structural diagram of the first mounting seat;

[0039] Figure 6 for Figure 3 A schematic diagram of the structure of the second cooling fan;

[0040] Figure 7 for Figure 6 Schematic diagram of the structure of the second mounting base.

[0041] Reference numerals:

[0042] 10. Shell; 101. Installation cavity; 102. Buffer cavity; 103. Air inlet; 104. Air outlet; 11. Door frame; 111. Top frame beam; 112. Frame column; 113. Partition beam; 12. Outer panel; 13. Inner panel; 20. Display screen; 30. First cooling fan; 301. First drainage channel; 31. First fan body; 32. First mounting seat; 321. Mounting ring; 322. First lifting block; 323. Second lifting block; 3231. Guide slope; 40. Second cooling fan; 401. Second drainage channel; 41. Second fan body; 42. Second mounting seat; 421. Mounting plate; 422. Air deflector; 51. First guide pipe; 52. Second guide pipe. DETAILED DESCRIPTION

[0043] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0044] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0046] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0047] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0048] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0049] Currently, most built-in steam ovens feature a separate door and display screen design, with some even integrating the screen into the oven handle. To maintain the integrity and integration of built-in kitchen appliances, the optimal design is to fully integrate the display screen and oven door. However, integrating the display screen into the oven door presents a problem. Display screens, especially high-resolution color touch screens, incorporate numerous chips and other precision electronic components. When the oven door is operating in the baking mode, the door glass typically faces the oven's inner chamber. During this time, the maximum temperature within the chamber typically exceeds 30°C. If the display screen integrated into the door does not dissipate heat effectively, it can easily cause the temperature to rise beyond its design tolerances.

[0050] Based on this, it is necessary to provide a door assembly and steaming and baking cooking method that can improve the heat dissipation effect of the display screen 20.

[0051] See also Figures 1 to 3 , Figure 1 This is a schematic structural diagram of a door assembly in an embodiment provided in this application. Figure 2 for Figure 1 A cross-sectional view of the mounting cavity of the door assembly shown, Figure 3 for Figure 1Schematic diagram of a partial structure of the middle door assembly. The door assembly provided in this application includes a housing 10, a display screen 20, a first heat dissipation fan 30, and a second heat dissipation fan 40. The housing 10 has a mounting cavity 101, an air inlet 103 and an air outlet 104 respectively connected to the mounting cavity 101, and the housing 10 further has a light-transmitting area located in the mounting cavity 101. The display screen 20 is disposed within the mounting cavity 101 and is located between the air inlet 103 and the air outlet 104. The display screen 20 is located in the light-transmitting area of ​​the housing 10. The first heat dissipation fan 30 and the second heat dissipation fan 40 are respectively disposed in the air inlet 103 and the air outlet 104 to form a heat dissipation airflow path within the mounting cavity 101 that passes through the display screen 20. The first heat dissipation fan 30 is used to introduce cold air from the air inlet 103 and create a disturbance to the air in the installation cavity 101. The second heat dissipation fan 40 is used to discharge the hot air that has absorbed the heat of the display screen 20 from the air outlet 104 in a timely manner to avoid heat accumulation in the installation cavity 101. The heat dissipation airflow path formed in this way can pass through the display screen 20 and fully take away the heat of the display screen 20 itself and the heat transferred from the inside of the steam oven to the display screen 20, thereby improving the heat dissipation effect of the display screen 20 and ensuring that the temperature rise of the display screen 20 is within the design allowable range.

[0052] See also Figure 2 Specifically, the housing 10 includes a door frame 11, an outer panel 12, and an inner panel 13. The outer panel 12 and the inner panel 13 are spaced apart along the thickness direction of the door frame 11 and mounted on either side of the door frame 11. The light-transmitting area is located on the outer panel 12. This housing 10 has high structural strength and a stable shape of the mounting cavity 101, facilitating the installation of a flat-panel display screen 20. Optionally, the outer panel 12 and the inner panel 13 can each be made of glass. It is understood that the light-transmitting area can be the entire outer panel 12 or can be provided only at the location corresponding to the mounting position of the display screen 20.

[0053] Taking into account the actual use scenario of the built-in steam oven, the display screen 20 needs to be set above the built-in steam oven to ensure that the user has a good viewing angle. Specifically, in this embodiment provided by the present application, the door frame 11 includes a top frame beam 111, a pair of frame columns 112 and a partition beam 113. The pair of frame columns 112 are arranged at both ends of the top frame beam 111 at intervals, and the partition beam 113 is arranged at intervals on the top frame beam 111. The two ends of the partition beam 113 are respectively installed in the middle of the two frame columns 112 to form a buffer cavity 102 connected to the outside with the outer plate 12, the inner plate 13 and the two frame columns 112. The air inlet 103 and the air outlet 104 are respectively located on the partition beam 113 for connecting the installation cavity 101 and the buffer cavity 102. Due to the setting of the buffer cavity 102, the heat dissipation airflow path in the installation cavity 101 is less affected by the outside world, and water droplets splashed outside the shell 10 are not easy to enter the installation cavity 101. It can be understood that the bottom ends of the two frame columns 112, the outer plate 12 and the inner plate 13 are arranged to form a channel opening that connects the buffer cavity 102 to the outside, that is, the lower end opening of the shell 10. The channel opening or the lower end opening has a large area, and even if it is partially blocked, it will not affect the airflow between the installation cavity 101 and the buffer cavity 102, thereby ensuring the stability of the heat dissipation airflow path.

[0054] See also Figure 3 , Figure 3 This is a partial structural diagram of a door assembly in another embodiment provided herein. Furthermore, to enhance heat dissipation, in one embodiment provided herein, the door assembly further comprises a first guide tube 51 and a second guide tube 52 located within the buffer cavity 102. The first guide tube 51 extends from the air inlet 103 away from the top frame beam 111, and the second guide tube 52 extends from the air outlet 104 away from the top frame beam 111. This prevents hot air exiting the installation cavity 101 through the air outlet 104 from flowing back into the air inlet 103, thereby enhancing heat dissipation for the display screen 20 within the installation cavity 101.

[0055] Furthermore, considering that the heat of the inner panel 13 is higher than that of the outer panel 12 during actual use, in order to reduce the heat of the inner panel 13 from entering the installation cavity 101 via cold air, the first guide tube 51 and the second guide tube 52 are spaced apart from the inner panel 13. This separates the two guide tubes from the heat source of the inner panel 13, thereby improving the heat dissipation effect on the display screen 20 within the installation cavity 101. More preferably, in other embodiments, a middle glass is provided between the outer panel 12 and the inner panel 13 to further prevent heat from the inner panel 13 from being transferred outward. It will be understood that in this application, the middle glass is only located within the buffer cavity 102. In other embodiments, if the first heat dissipation fan 30 and the second heat dissipation fan 40 are ultra-thin heat dissipation fans, a layer of middle glass can also be arranged within the installation cavity 101 to prevent heat from the inner panel 13 from being transferred outward. Optionally, in the embodiment provided in the present application, the air inlet 103 and / or the air outlet 104 are located on the side of the partition beam 113 close to the outer panel 12, which can further reduce the impact of the heat of the inner panel 13 on the heat dissipation airflow path in the installation cavity 101.

[0056] See also Figure 2 and Figure 3 . Optionally, in order to further reduce the heat transfer from the inner plate 13 to the display screen 20, the display screen 20 and the inner plate 13 are spaced apart and attached to the outer plate 12. Since the display screen 20 and the outer plate 12 are attached to each other, the display effect of the display screen 20 is also improved, which is conducive to reducing the appearance of ghosting on the display screen. The first cooling fan 30 and the second cooling fan 40 are respectively turbine cooling fans. The air intake of the first cooling fan 30 is directed toward the outer plate 12 and the exhaust port is directed toward the display screen 20. The air intake of the second cooling fan 40 is directed toward the inner plate 13 and the exhaust port is directed toward the air outlet 104. In this way, the first cooling fan 30 is less affected by the inner plate 13 when inhaling cold air from the air inlet 103. The exhaust port directly blows the display screen 20, which further shortens the heat dissipation airflow path. In addition to being able to discharge the hot air on the heat dissipation airflow path, the second cooling fan 40 can also bring the heat of the inner plate 13 near the air outlet 104 out of the installation cavity 101, thereby reducing the local temperature of the installation cavity 101 and improving the heat dissipation effect on the display screen 20.

[0057] See also Figures 4 to 7 , Figure 4 for Figure 3 The structural diagram of the first cooling fan 30 is shown in FIG. Figure 5 for Figure 4 A schematic structural diagram of the first mounting seat 32, Figure 6 for Figure 3 The structural diagram of the second cooling fan 40 is shown in FIG. Figure 7 for Figure 6Schematic diagram of the structure of the second mounting base 42. Optionally, to facilitate the installation of the heat dissipation fan, in one embodiment provided in the present application, the first heat dissipation fan 30 includes a first mounting base 32 mounted on the outer panel 12 and a first fan body 31 mounted on the first mounting base 32, the first mounting base 32 having a first drainage channel 301 connected to the air intake port and the air inlet hole 103 of the first fan body 31; the second heat dissipation fan 40 includes a second mounting base 42 mounted on the outer panel 12 and a second fan body 41 mounted on the second mounting base 42, the second mounting base 42 having a second drainage channel 401 connected to the air outlet port and the air outlet hole 104 of the second fan body 41.

[0058] See also Figure 4 and Figure 5 Specifically, in order to optimize the heat dissipation effect of the display screen 20, it is necessary to optimize the heat dissipation airflow path, especially at the air inlet hole 103. The first mounting base 32 includes a mounting ring 321 and a first lifting block 322 and a second lifting block 323 located at both ends of the mounting ring 321. The first lifting block 322 and the second lifting block 323 abut against the outer panel 12 to form the above-mentioned first diversion channel 301. The first diversion channel 301 is close to the outer panel 12 with a lower temperature. In addition to reducing the influence of heat dissipation of the inner panel 13, it can also use the cold air to reduce the temperature of the outer panel 12, thereby avoiding the problem of the outer panel 12 being too hot and scalding the user. In addition, a guide slope 3231 is provided on the side of the second lifting block 323 facing away from the outer panel 12. The cold air discharged from the exhaust port of the first fan body 31 is guided to the gap between the display screen 20 and the inner panel 13 via the guide slope 3231.

[0059] See also Figure 6 and Figure 7 In order to reduce the backflow of hot air, in one embodiment provided in the present application, the second mounting base 42 includes a mounting plate 421 and a guide cover 422 fixed to the side of the mounting plate 421 close to the air outlet 104. One end of the guide cover 422 is covered at the exhaust port of the second fan body 41, and the other end is close to the air outlet 104, so that the above-mentioned second drainage channel 401 is formed at the guide cover 422.

[0060] In addition to the above structure, the present application also considers the waterproofing of built-in steam ovens during actual use. The actual installation location of a built-in steam oven, such as in a cabinet below a stove or in a lower cabinet on a kitchen countertop, can easily cause water on the countertop to be wiped toward the edge when a customer cleans the countertop, causing water to flow through the cabinet surface and into the built-in cabinet below. If the display screen 20 is installed above the door, to prevent water from entering the door and affecting the electronic components of the display screen 20, a good waterproof seal is required above the door. Based on this, the door assembly provided in the present application further includes a downward-facing snap-in groove on the top frame beam 111. The upper edge of the inner panel 13 snaps into the snap-in groove. The cross-sectional shape of the snap-in groove is preferably U-shaped. The top frame beam 111 is preferably made of plastic. The joints between the outer panel 12 and the inner panel 13 and the top frame beam 111 are sealed with waterproof sealant to ensure that water leaks from above the door assembly and affect the electronic components of the display screen 20.

[0061] The present application also provides a steam-bake cooking machine, comprising a steam oven main body and a door assembly as described above, wherein the door assembly is mounted on the steam oven main body. A first heat dissipation fan 30 is used to draw cool air from below the door assembly, which removes heat from the display screen 20 within the installation cavity 101. A second heat dissipation fan 40 is then used to expel the hot air within the installation cavity 101, thereby improving the heat dissipation effect. Because the top frame beam 111 of the door assembly is also provided with a downward-facing U-shaped groove, the U-shaped groove engages with the inner panel 13 to achieve a waterproof effect, thereby protecting the electronic components of the display screen 20. It is worth noting that the air inlet and outlet holes of the door assembly are both arranged downwardly, which, combined with the buffer cavity 102, can minimize the entry of water droplets into the door assembly housing 10, achieving a splash-proof effect.

[0062] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. Door assembly, characterized in that, include: A housing having a mounting cavity, an air inlet and an air outlet respectively connected to the mounting cavity, and a light-transmitting area located in the mounting cavity; a display screen, the display screen being disposed in the mounting cavity and between the air inlet and the air outlet, the display screen being located in a light-transmitting area of ​​the housing; as well as A first heat dissipation fan and a second heat dissipation fan are respectively located at the air inlet and the air outlet to form a heat dissipation airflow path that passes through the display screen in the installation cavity.

2. The door assembly according to claim 1, wherein: The shell includes a door frame and an outer plate and an inner plate respectively installed on both sides of the door frame along the thickness direction of the door frame to form the installation cavity, and the light-transmitting area is located on the outer plate.

3. The door assembly according to claim 2, wherein: The door frame includes a top frame beam, a pair of frame columns spaced apart at both ends of the top frame beam, and a partition beam spaced apart from the top frame beam; The two ends of the partition beam are respectively installed in the middle of the two frame columns to form a buffer cavity connected to the outside together with the outer plate, the inner plate and the two frame columns. The air inlet and the air outlet are respectively located on the partition beam for connecting the installation cavity and the buffer cavity.

4. The door assembly according to claim 3, wherein: The display screen is spaced apart from the inner panel, and the display screen is attached to the outer panel; The first cooling fan and the second cooling fan are respectively turbine cooling fans, the air intake of the first cooling fan is toward the outer panel and the air outlet is toward the display screen, and the air intake of the second cooling fan is toward the inner panel and the air outlet is toward the air outlet.

5. The door assembly according to claim 4, wherein: The air inlet and / or the air outlet are located on a side of the partition beam close to the outer plate.

6. The door assembly according to claim 4, wherein: The first heat dissipation fan comprises a first mounting base mounted on the outer panel and a first fan body mounted on the first mounting base, the first mounting base having a first drainage channel connected to an air intake of the first fan body and the air inlet hole; and / or The second heat dissipation fan includes a second mounting base mounted on the outer plate and a second fan body mounted on the second mounting base, and the second mounting base has a second drainage channel connected to the exhaust port of the second fan body and the air outlet.

7. The door assembly according to claim 3, wherein: The door assembly further includes a first guide pipe located in the buffer cavity and extending from the air inlet in a direction away from the top frame beam; The door assembly further includes a second guide pipe located in the buffer cavity and extending from the air outlet in a direction away from the top frame beam.

8. The door assembly according to claim 7, wherein: The first guide tube and the second guide tube are respectively spaced apart from the inner plate.

9. The door assembly according to claim 3, wherein: The top frame beam has a clamping groove with a notch facing downward, and the upper edge of the inner plate is clamped in the clamping groove.

10. Steaming and baking cooking machine, characterized in that: include: Steam oven body; as well as The door assembly according to any one of claims 1 to 9, wherein the door assembly is mounted on the steam oven main body.

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