Door assembly and cooking utensil

Abstract

The utility model discloses a door assembly and a cooking utensil, and relates to the technical field of kitchen appliances. The door assembly comprises a door body and a first draught fan, the door body comprises a door plate and a heat insulation plate which are arranged in a spaced mode, a gas channel is formed between the door plate and the heat insulation plate, the gas channel is provided with a first gas inlet and a first gas outlet, and a heat insulation space is formed in the heat insulation plate; the gas concentration in the heat insulation space is smaller than that of air outside the heat insulation plate; the first fan is arranged in the gas channel, and an air outlet of the first fan faces the first air outlet. According to the door assembly, the air density in the air channel is more uniform, airflow is more gathered, an air path is more stable, and the air volume loss is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen appliances, in particular to a door assembly and a cooking appliance. Background Art

[0002] With the continuous improvement of people's living standards, cooking appliances with a variety of cooking functions have gradually become essential cooking devices in people's kitchens. When the cooking appliance is working, a large amount of heat will be released in the inner container, and it is necessary to cool down the door body to prevent scalding users due to excessive temperature or reducing the service life of the components inside the door body.

[0003] In the prior art, a gas channel is arranged inside the door body, and a blower is arranged in the gas channel. When the blower is started, external air can enter the gas channel to dissipate heat from the door body. However, affected by the inner container, there is a temperature difference in the gas channel of the door body. After the external air enters the gas channel, it will be heated and expanded in the high-temperature area, and the density will decrease, resulting in the airflow blown by the blower not being concentrated enough, the air path not being stable enough, and causing air volume loss. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a door assembly and a cooking appliance, which can make the air density in the gas channel more uniform, the airflow more concentrated, the air path more stable, and effectively reduce the air volume loss.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] A door assembly, comprising:

[0007] A door body, the door body includes a door panel and a heat insulation board arranged at intervals, a gas channel is formed between the door panel and the heat insulation board, the gas channel has a first air inlet and a first air outlet, a heat insulation space is arranged in the heat insulation board, and the gas concentration in the heat insulation space is less than the gas concentration of the air outside the heat insulation board;

[0008] A first blower, arranged in the gas channel, and the air outlet of the first blower faces the first air outlet.

[0009] As an optional scheme of the above door assembly, the door assembly further includes a camera, the camera is arranged in the gas channel, and the gas flowing out of the air outlet of the first blower passes through the camera.

[0010] As an optional scheme of the above door assembly, along the thickness direction of the door assembly, the projection of the camera and the projection of the first blower are both within the range of the heat insulation space.

[0011] As an optional scheme of the above door assembly, the air outlet of the first blower is arranged facing the camera.

[0012] As an alternative to the above-mentioned door assembly, in the thickness direction of the door assembly, the projection of the camera and the projection of the first blower are both within the range of the heat insulation space. Along the flow direction of the gas flowing out of the air outlet of the first blower, the cross-sectional dimension of the gas passage is a, and the cross-sectional dimension of the air flow area in the gas passage driven by the first blower is b, where b / a = 0.05 - 0.2.

[0013] As an alternative to the above-mentioned door assembly, the door assembly further includes a bracket. The bracket is disposed in the gas passage. The bracket has a cavity for mounting the camera. Along the flow direction of the air flow in the gas passage, the cavity gradually converges.

[0014] As an alternative to the above-mentioned door assembly, the bracket includes two side plates and a top plate. Along the flow direction of the air flow in the gas passage, the distance between the two side plates gradually decreases. The top plate is connected between the upstream ends of the two side plates. The side plates are provided with ventilation holes.

[0015] A cooking appliance includes the above-mentioned door assembly and further includes a cabinet. The cabinet is provided with an opening. The door body is hinged to the cabinet to open or close the opening. The cabinet includes a heat dissipation pipeline, a second air inlet and a second air outlet communicated with the heat dissipation pipeline. A second blower is disposed in the heat dissipation pipeline. The first air outlet is communicated with the second air inlet.

[0016] As an alternative to the above-mentioned cooking appliance, when the door assembly closes the opening, the first air outlet and the second air inlet are directly opposite and arranged at an interval.

[0017] As an alternative to the above-mentioned cooking appliance, the second air outlet is located above the communication position of the first air outlet and the second air inlet, and the opening position of the second air outlet is in front of the communication position of the first air outlet and the second air inlet.

[0018] Advantages of the present utility model:

[0019] The present utility model provides a door assembly and a cooking appliance. The door assembly includes a door body formed by spacing a door panel and a heat insulation panel. Since the heat insulation panel has a heat insulation space with a gas concentration less than that of the external air, the heat insulation effect is good. It can isolate the heat in the inner container of the cooking appliance, reduce the temperature difference in the gas passage of the door body, so that the air flow blown by the first blower will not be overheated, and thus will not expand due to heat and cause a decrease in density. The air density in the gas passage is more uniform, the air flow is more concentrated, and the air path is more stable, effectively reducing the air volume loss. Description of the Drawings

[0020] Figure 1 is a schematic structural view of a cooking appliance provided by the present utility model;

[0021] Figure 2 is a schematic structural view of a door assembly provided by the present utility model;

[0022] Figure 3 is an exploded view of a cooking appliance provided by the present utility model;

[0023] Figure 4 is a cross-sectional view of a cooking appliance provided by the present utility model;

[0024] Figure 5 is Figure 4 a partial enlarged view of part A in

[0025] Figure 6 is an exploded view of a door assembly provided by the present utility model;

[0026] Figure 7 is a front view of a door assembly provided by the present utility model;

[0027] Figure 8 is a schematic structural view of a bracket provided by the present utility model.

[0028] In the figure:

[0029] 1. Door assembly; 2. Cabinet; 3. Inner container;

[0030] 11. Door body; 12. Gas passage; 13. Bracket; 14. Camera; 15. First blower; 16. Blower bracket; 17. Support frame; 21. Opening; 22. Heat dissipation pipeline; 23. Second blower; 24. Front panel;

[0031] 111. Door panel; 112. Heat insulation board; 113. First air inlet; 114. First air outlet; 131. Back plate; 132. Side plate; 133. Top plate; 134. Ventilation hole; 135. Mounting post; 136. Card slot; 171. Vertical part; 172. Horizontal part; 221. Upper cover; 222. Partition; 223. Lower cover; 224. Second air inlet; 225. Second air outlet; 226. Condensation assembly; 227. Return box;

[0032] 1721. Cross plate; 1722. Vertical plate; 2221. Return hole. Detailed implementation manners

[0033] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0034] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0035] Unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to", "fixed" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0036] Unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature not being in direct contact but being in contact through other features therebetween. Moreover, the first feature being "above", "above the top of", and "on the top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is at a higher horizontal height than the second feature. The first feature being "below", "below the bottom of", and "under the bottom of" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature is at a lower horizontal height than the second feature.

[0037] The technical solution of the present utility model will be further described below in conjunction with the drawings and through specific embodiments.

[0038] With the continuous improvement of people's living standards, cooking appliances with multiple cooking functions have gradually become an essential cooking device in people's kitchens. As Figure 1 and Figure 2 shown, this embodiment provides a cooking appliance, which includes a box body 2 and a door assembly 1. The box body 2 is provided with an opening 21, and through the opening 21, food ingredients can be put into the inner container 3 inside the box body 2 for cooking. The door assembly 1 is hinged to the box body 2 to open or close the opening 21. Specifically, the cooking appliance can be a steam box, a steam oven, a steam convection oven, etc.

[0039] Since a cooking appliance needs to heat food materials, when the cooking appliance is working, the temperature of the inner container 3 is very high, which can easily affect the surrounding electronic components. For example Figures 3 to 5 As shown, to solve the above problems, the cabinet 2 includes a heat dissipation pipeline 22, and the heat dissipation pipeline 22 is arranged outside the inner container 3 and has a second air inlet 224 and a second air outlet 225. In order to enable the gas in the heat dissipation pipeline 22 to flow from the second air inlet 224 to the second air outlet 225, a second fan 23 is arranged in the heat dissipation pipeline 22. After the second fan 23 is started, the cold air outside the cabinet 2 enters the heat dissipation pipeline 22 through the second air inlet 224 and is discharged from the heat dissipation pipeline 22 through the second air outlet 225, thereby taking away the heat dissipated by the inner container 3 and preventing it from affecting other electronic components in the cabinet 2.

[0040] Specifically, the second air inlet 224 of the heat dissipation pipeline 22 is opened on the front panel 24. Generally speaking, cooking appliances are usually placed on a shelf or in a specially provided wall groove, resulting in poor air flow around the cooking appliance. Only the front space is open. Therefore, opening the second air inlet 224 on the front panel 24 facilitates the suction of cold air from the outside into the heat dissipation pipeline 22 by the fan.

[0041] Similarly, the second air outlet 225 of the heat dissipation pipeline 22 is opened on the front panel 24, so that the air that has absorbed heat can be smoothly discharged, improving the heat dissipation capacity.

[0042] For example Figure 3 and Figure 4 As shown, the heat dissipation pipeline 22 includes an upper cover 221 and a lower cover 223 that are buckled together. A substantially horizontal partition 222 is arranged between the upper cover 221 and the lower cover 223 to divide the heat dissipation pipeline 22 into an air inlet duct and an air outlet duct arranged vertically. The second fan 23 is arranged on the partition 222. In this setting, the second air inlet 224 and the second air outlet 225 can both be opened on the front panel 24, ensuring the heat dissipation capacity.

[0043] To reduce the water vapor content in the air discharged from the second air outlet 225, a condensation component 226 is arranged in the air outlet duct. The condensation component 226 can condense the water vapor into liquid water. In this embodiment, the cooking appliance further includes a return box 227. The return box 227 is arranged in the air inlet duct. The partition 222 is provided with a return hole 2221. The condensed liquid water can flow into the return box 227 through the return hole 2221. The return box 227 can not only collect the condensed water but also be connected to other pipelines to drain the condensed water to other required positions.

[0044] When the cooking appliance is working, a large amount of heat will be released in the inner container 3, and it is necessary to cool down the door assembly 1 to prevent the user from being scalded due to excessive temperature or reducing the service life of the components in the door assembly 1. In order to dissipate heat and cool down the door assembly 1, the door assembly 1 of this embodiment includes a door body 11 and a first fan 15. The door body 11 includes a door panel 111 and a heat insulation plate 112 arranged at intervals. A gas passage 12 is formed between the door panel 111 and the heat insulation plate 112. The gas passage 12 has a first air inlet 113 and a first air outlet 114. A heat insulation space is arranged in the heat insulation plate 112, and the gas concentration in the heat insulation space is less than the gas concentration of the air outside the heat insulation plate 112. The first fan 15 is arranged in the gas passage 12, and the air outlet of the first fan 15 faces the first air outlet 114.

[0045] Among them, the gas concentration refers to the number of gas molecules per unit volume. Since the molecules of the gas will make the random motion more intense after absorbing energy and transfer heat by colliding with each other, the heat conduction ability of the gas is proportional to the gas concentration. Therefore, the heat conduction ability of the heat insulation space is much lower than that of the air between the traditional adjacent heat insulation glasses. That is to say, the heat insulation space has good heat insulation ability.

[0046] The door body 11 is formed by the door panel 111 and the heat insulation plate 112 arranged at intervals. Since the heat insulation plate 112 has a heat insulation space with a gas concentration less than that of the external air, the heat insulation effect is good, which can isolate the heat in the inner container 3 of the cooking appliance, reduce the temperature difference in the gas passage 12 of the door body 11, and prevent the air flow blown by the fan from being overheated. Therefore, it will not expand due to heat and cause a decrease in density. The air density in the gas passage 12 is more uniform, the air flow is more concentrated, and the air path is more stable, effectively reducing the air volume loss.

[0047] In this embodiment, the heat insulation space is a vacuum, so that the heat insulation plate 112 has good heat insulation ability.

[0048] In this embodiment, the first air outlet 114 is communicated with the second air inlet 224. That is to say, when the second fan 23 is started, the negative pressure in the heat dissipation pipeline 22 can increase the air flow rate in the gas passage 12, and the external cold air can continuously enter the heat dissipation pipeline 22 through the gas passage 12. It can not only increase the speed of the air flow blown by the first fan 15, but also quickly take away the heat in the gas passage 12, further improving the heat dissipation ability and extending the service life. Moreover, due to the strong heat dissipation ability, it can also reduce the temperature difference in the gas passage 12, further reducing the deflection amount of the air blown by the first fan 15 and effectively reducing the air volume loss.

[0049] In this embodiment, when the door assembly 1 closes the opening 21, the first air outlet 114 and the second air inlet 224 are directly opposite and arranged at an interval. That is to say, when the opening 21 of the box body 2 is closed, the first air outlet 114 and the second air inlet 224 are relatively close, and gas can enter the heat dissipation pipeline 22 from the gas channel 12 through the first air outlet 114 and the second air inlet 224.

[0050] As Figure 5 shown, even if the first air outlet 114 and the second air inlet 224 are directly opposite, there is still a gap between the first air outlet 114 and the second air inlet 224. In order to prevent the hot air discharged from the second air outlet 225 from being re - inhaled into the heat dissipation pipeline 22 through the gap between the first air outlet 114 and the second air inlet 224, the second air outlet 225 is located above the communication position of the first air outlet 114 and the second air inlet 224, and the opening 21 position of the second air outlet 225 is located in front of the communication position of the first air outlet 114 and the second air inlet 224.

[0051] Among them, the second air outlet 225 is located above the communication position of the first air outlet 114 and the second air inlet 224, so that the hot air discharged from the second air outlet 225 can cross over the door body 11 and thus be discharged outside the cooking appliance. And the opening 21 position of the second air outlet 225 is located in front of the communication position of the first air outlet 114 and the second air inlet 224, which can make the discharged hot air cross over the door body 11 faster, keep the hot air away from the gap between the first air outlet 114 and the second air inlet 224, and avoid being re - inhaled.

[0052] As Figure 6 and Figure 7 shown, in order to increase the intelligence level of the cooking appliance, a camera 14 is generally installed in the door assembly 1 of the cooking appliance to identify the types and ripeness of ingredients in the inner cavity 3 during the cooking process. In this embodiment, the door assembly 1 further includes a camera 14. The camera 14 is arranged in the gas channel 12, and the heat insulation plate 112 has a transparent area, and the camera 14 can take pictures through the transparent area.

[0053] Since the camera 14 is located in the gas channel 12, the heat insulation plate 112 can isolate the heat in the inner cavity 3 of the cooking appliance, and when the first fan 15 and the second fan 23 are started to drive the air flow in the gas channel 12, it can also play a role in dissipating heat for the camera 14. Moreover, the heat insulation plate 112 has a heat insulation space with a gas concentration smaller than that of the external air, so the heat insulation plate 112 can achieve the same heat insulation effect with a smaller thickness, thereby improving the shooting effect of the camera 14.

[0054] It can be understood that the heat insulation board 112 cannot completely isolate heat. To avoid the temperature of the camera 14 from being too high, in the thickness direction of the door assembly 1, the projection of the camera 14 is located within the range of the heat insulation space. Since the heat insulation space has the best heat insulation ability, most of the heat can be directly blocked by the heat insulation space, and only a small part of the heat can directly affect the camera 14, reducing the temperature of the camera 14.

[0055] In this embodiment, the gas flowing out of the air outlet of the first fan 15 passes through the camera 14 to dissipate heat from the camera 14. To further improve the heat dissipation effect of the first fan 15 on the camera 14, in the air outlet direction of the first fan 15, the projection of the camera 14 is completely within the projection of the air outlet, so as to ensure that the air flow blown out from the air outlet can cover the entire camera 14 and improve the heat dissipation of the camera 14.

[0056] In this embodiment, in the thickness direction of the door assembly 1, the projection of the first fan 15 is located within the range of the heat insulation space, which can also ensure that the temperature difference on the flow path of the gas flowing out of the air outlet of the first fan 15 is small, so that the air blown out by the first fan 15 does not shift, effectively reducing the air volume loss.

[0057] As Figure 7 shown, the air outlet of the first fan 15 is arranged facing the camera 14, so that the flow path of the gas blown out from the air outlet of the first fan 15 is the shortest, thereby maximizing the heat dissipation effect on the camera 14.

[0058] In this embodiment, in the thickness direction of the door assembly, the projections of the camera 14 and the first fan 15 are both located within the range of the heat insulation space. Along the flow direction of the gas flowing out of the air outlet of the first fan 15, the cross-sectional dimension of the gas passage 12 is a, and the cross-sectional dimension of the air flow area in the gas passage 12 driven by the first fan 15 is b, and b / a = 0.05 - 0.2. That is to say, the heat insulation space can reduce the temperature difference in the space between the camera 14 and the first fan 15, so that the air flow blown out by the first fan 15 will not be overheated, and the gas flowing out of the air outlet of the first fan 15 will not shift without the guidance of a pipeline structure. Therefore, the air outlet of the first fan 15 and the camera 14 can be an open structure, and no pipeline needs to be set, reducing the material cost and simplifying the structure of the door assembly 1. Specifically, b / a can be 0.05, 0.1, 0.15 or 0.2.

[0059] In this embodiment, the first air inlet 113 is located at the bottom end of the door body 11. Looking at the whole cooking appliance, the distance between the inlet and the outlet of the heat dissipation path formed by the heat dissipation pipeline 22 and the gas passage 12 is relatively far, and the hot air discharged from the outlet will not affect the air temperature near the inlet, so as to ensure that the cooking appliance always has good heat dissipation ability.

[0060] It can be understood that the air flow direction in the gas passage 12 is from bottom to top. Therefore, the camera 14 is located directly above the first fan 15, so that whether it is the gas flow in the gas passage 12 caused by the negative pressure generated by the second fan 23 or the gas flow in the gas passage 12 caused by the startup of the first fan 15, the direction can be kept consistent, avoiding air volume loss and improving the heat dissipation effect.

[0061] In this embodiment, the heat insulation board 112 includes at least two layers of plate bodies. The adjacent two layers of plate bodies are sealed and connected by an annular sealing part, and a heat insulation space is formed inside the sealing part. The sealing part can support the two layers of plate bodies, ensure that the distance between the two layers of plate bodies remains unchanged, and ensure the sealing performance by sealing to form a heat insulation space. Specifically, the plate body is a glass plate, and the heat insulation board 112 can also include more layers of plate bodies to improve the heat insulation ability.

[0062] Generally, in the heat insulation structure formed by multiple layers of glass, the thickness of the glass and the distance between adjacent glasses are both greater than 4 mm, which results in the overall thickness of the heat insulation structure being greater than 12 mm. In this embodiment, the thickness of the plate body is 2 mm to 4 mm. By using a thinner plate body, the overall thickness of the heat insulation board 112 can be reduced. Specifically, the thickness of the plate body can be 2 mm, 2.5 mm, 3 mm, 3.5 mm or 4 mm.

[0063] In this embodiment, the distance between adjacent two layers of plate bodies is 0.1 mm to 0.2 mm. Since there is a heat insulation space between adjacent two layers of plate bodies and the heat insulation ability of the heat insulation space is good, the heat insulation board 112 can still have good heat insulation ability on the premise of reducing the distance between the two layers of plate bodies. Specifically, the distance between adjacent two layers of plate bodies can be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm or 0.2 mm.

[0064] As Figures 6 to 8 shown, the door assembly 1 further includes a bracket 13. The camera 14 is installed at the upper middle position on the inner side surface of the door panel 111, and the camera 14 is fixed on the inner side surface of the door panel 111 by the bracket 13. Specifically, the bracket 13 is arranged in the gas passage 12. The bracket 13 has a cavity for installing the camera 14, and the cavity gradually converges along the air flow direction in the gas passage 12. One end of the cavity close to the first fan 15 is an open structure. Even if the air flow blown out by the first fan 15 is slightly dispersed, it can be converged by the cavity to dissipate heat for the camera 14, further reducing the air volume loss.

[0065] In order to enable the airflow entering the cavity to leave the cavity to carry away heat, ventilation holes 134 are provided on the bracket 13, and the airflow leaves the cavity through the ventilation holes 134.

[0066] Specifically, the bracket 13 includes a back plate 131, two side plates 132 and a top plate 133. One side of the back plate 131 is connected to the inner side surface of the door body 11. The top plate 133 is connected to the top end of the back plate 131. The two side plates 132 are respectively connected to the left and right sides of the back plate 131. Along the flowing direction of the airflow in the gas passage 12, the distance between the two side plates 132 gradually decreases, and the top plate 133 is connected between the upstream ends of the two side plates 132. The top plate 133 and the two side plates 132 jointly enclose a cavity for installing the camera 14, and the camera 14 is installed on the back plate 131 and is located inside the cavity.

[0067] The structure between the two side plates 132 is wider at the bottom and narrower at the top. This structure can gather as much air blown out from the air outlet of the first fan 15 into the cavity as possible, thereby reducing the air volume loss and sufficiently dissipating heat from the camera 14.

[0068] Preferably, the side plate 132 is provided with ventilation holes 134, which is beneficial to the discharge of the air in the cavity and also beneficial to the flow of the air in the gas passage 12. The top plate 133 is not provided with ventilation holes 134. The top plate 133 can protect the camera 14 and prevent condensed water or other liquids from flowing onto the camera 14 and damaging the camera 14. Or in other embodiments, the bracket 13 may not be provided with the top plate 133, and the two side plates 132 form a cavity, and the gap between the upper ends of the two side plates 132 forms ventilation holes 134.

[0069] It can be understood that in order to increase the shooting range of the camera 14, the bracket 13 is located at the upper part of the door body 11, so the lens of the camera 14 is inclined downward. To fix the camera 14, the back plate 131 is provided with a mounting post 135 and a card slot 136. The bottom end of the camera 14 is snapped into the card slot 136, and the camera 14 is fixedly connected to the mounting post 135. The mounting post 135 and the card slot 136 are used in cooperation to fix the camera 14, which not only simplifies the structure but also facilitates disassembly and maintenance.

[0070] As Figure 6 and Figure 7 shown, the first fan 15 is installed at the lower part of the inner side surface of the door panel 111, and the first fan 15 is fixed on the inner side surface of the door panel 111 by a fan bracket 16. The fan bracket 16 has a first air inlet passage, and the first fan 15 has a second air inlet passage. The first air inlet passage is communicated with the second air inlet passage, and the area of the first air inlet passage is larger than the area of the second air inlet passage. With such a setting, the working efficiency of the first fan 15 can be fully exerted, and it is ensured that enough cold air is inhaled into the gas passage 12.

[0071] Specifically, the fan bracket 16 and the door panel 111 enclose a channel air inlet connected to the first air inlet channel, the first fan 15 has a fan air inlet connected to the second air inlet channel, and the area of ​​the channel air inlet is larger than the area of ​​the fan air inlet.

[0072] like Figure 6 and Figure 7 As shown, the door assembly 1 further includes a support frame 17, which is disposed between the door panel 111 and the heat insulation board 112. The door panel 111, the heat insulation board 112 and the support frame 17 form a gas channel 12. The camera 14 is disposed in the gas channel 12, and the support frame 17 forms a first air inlet 113 and a first air outlet 114 that are connected to the gas channel 12. The support frame 17 can improve the overall strength of the door body 11, prevent the door body 11 from being deformed, and can also form a gas channel 12 between the door panel 111 and the heat insulation board 112.

[0073] In order to prevent the heat of the inner liner 3 from affecting the temperature of the gas in the gas channel 12, the orthographic projection of the gas channel 12 in the thickness direction of the door body 11 is located inside the heat-insulating space. The heat-insulating space can effectively block the heat and prevent the cold air in the gas channel 12 from being affected by the heat of the inner liner 3 and being heated up, thereby ensuring the heat dissipation effect of the heat dissipation channel.

[0074] In this embodiment, the support frame 17 includes two vertical parts 171 arranged at intervals in the horizontal direction and horizontal parts 172 respectively connected to the two vertical parts 171, the space between the bottom ends of the two vertical parts 171 forms the first air inlet 113, and the first air outlet 114 is opened in the horizontal part 172. The vertical part 171 and the horizontal part 172 can support the door body 11 from two directions perpendicular to each other, respectively, to improve the strength of the door body 11, and a gas channel 12 allowing gas to pass is formed between the two vertical parts 171, and by changing the distance between the two vertical parts 171, the cross-sectional area of ​​the gas channel 12 can be adjusted, thereby changing the gas flow rate.

[0075] Furthermore, the horizontal portion 172 includes a connected transverse plate 1721 and a vertical plate 1722, the transverse plate 1721 is respectively connected to the top ends of the two vertical portions 171, the vertical plate 1722 is located on the side of the two vertical portions 171 away from the door panel 111 and is connected to the heat insulation board 112, and the first air outlet 114 is opened on the vertical plate 1722 to ensure that the first air outlet 114 can be opposite to the second air inlet 224.

[0076] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. A door assembly, characterized in that: include: A door body (11), the door body (11) comprising a door plate (111) and a heat insulation plate (112) arranged at intervals, a gas channel (12) being formed between the door plate (111) and the heat insulation plate (112), the gas channel (12) having a first air inlet (113) and a first air outlet (114), a heat insulation space being arranged inside the heat insulation plate (112), and a gas concentration in the heat insulation space being lower than a gas concentration in air outside the heat insulation plate (112); A first fan (15) is disposed in the gas channel (12), and an air outlet of the first fan (15) faces the first air outlet (114).

2. The door assembly according to claim 1, characterized in that The door assembly further comprises a camera (14), wherein the camera (14) is arranged in the gas passage (12), and the gas flowing out of the air outlet of the first fan (15) passes through the camera (14).

3. The door assembly according to claim 2, characterized in that Along the thickness direction of the door assembly, the projection of the camera (14) and the projection of the first fan (15) are both located within the range of the heat-insulating space.

4. The door assembly according to claim 2, characterized in that The air outlet of the first fan (15) is arranged to face the camera (14).

5. The door assembly according to claim 2, characterized in that Along the thickness direction of the door assembly, the projection of the camera (14) and the projection of the first fan (15) are both located within the range of the heat-insulating space. Along the flow direction of the gas flowing out of the air outlet of the first fan (15), the cross-sectional dimension of the gas channel (12) is a, and the cross-sectional dimension of the air flow area in the gas channel driven by the first fan is b, and b / a=0.05-0.

2.

6. The door assembly according to any one of claims 2 to 5, characterized in that: The door assembly further comprises a bracket (13), wherein the bracket (13) is arranged in the gas passage (12), and the bracket (13) has a cavity for mounting the camera (14), and the cavity gradually contracts along the flow direction of the airflow in the gas passage (12).

7. The door assembly according to claim 6, characterized in that The bracket (13) comprises two side plates (132) and a top plate (133). Along the flow direction of the airflow in the gas channel (12), the distance between the two side plates (132) gradually decreases. The top plate (133) is connected between the upstream ends of the two side plates (132). The side plates (132) are provided with ventilation holes (134).

8. A cooking utensil, characterized in that: The invention comprises a door assembly as claimed in any one of claims 1 to 7, and further comprises a box body (2), wherein the box body (2) is provided with an opening (21), the door body (11) is hinged to the box body (2) to open or close the opening (21), the box body (2) comprises a heat dissipation duct (22) and a second air inlet (224) and a second air outlet (225) connected to the heat dissipation duct (22), a second fan (23) is arranged in the heat dissipation duct (22), and the first air outlet (114) is connected to the second air inlet (224).

9. The cooking device according to claim 8, characterized in that: When the door assembly closes the opening (21), the first air outlet (114) and the second air inlet (224) are directly opposite and spaced apart from each other.

10. The cooking appliance according to claim 9, characterized in that The second air outlet (225) is located above the communication position between the first air outlet (114) and the second air inlet (224), and the opening position of the second air outlet (225) is located in front of the communication position between the first air outlet (114) and the second air inlet (224).

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