Door assembly and cooking electric appliance

Abstract

The utility model provides a door assembly and a cooking electric appliance, the door assembly comprises a vertically arranged door skeleton, an inner door plate and a door front plate, the inner door plate is arranged between the door skeleton and the door front plate, a high temperature heat insulation cavity is formed between the inner door plate and the door skeleton, and a low temperature heat insulation cavity is formed between the door front plate and the inner door plate; a first sealing ring is arranged in the low-temperature heat insulation cavity, the door front plate is provided with a transparent window, the first sealing ring is located on the peripheral side of the transparent window, and the first sealing ring, the door front plate and the inner door plate jointly define a window sealing cavity. The window sealing cavity formed in the low-temperature heat insulation cavity through the first sealing ring can completely isolate high-humidity gas in air, temperature conduction is uniform, and water mist is effectively prevented from being generated in the transparent window; the structure is simple and production and processing are convenient.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and more specifically, to a door assembly and a cooking appliance. Background Technology

[0002] Cooking appliances such as ovens and microwave ovens generally consist of a door assembly and a cooking cavity. The door assembly seals the cooking cavity to prevent heat and moisture from escaping. To prevent condensation on the front door panel, current technologies typically incorporate a heat-insulating ventilation structure within the door assembly, or cut out the top and bottom of the inner door panel, or even employ a windowless design. The heat-insulating ventilation structure is relatively complex, requiring at least two air ducts to achieve its purpose. Over time, the inside of the door becomes dirty, obscuring the view through the window. Conversely, the cutout design of the inner door panel allows heat to be rapidly conducted to the front door panel, resulting in a high front door temperature and a poor user experience.

[0003] Therefore, the applicant's prior patent application, number 202322972472.0, discloses a cooking appliance, including a cooking cavity with a first opening; a door assembly, which is closable at the first opening; and a first sealing ring, adapted to seal between the door body and the front panel of the cavity when the door assembly is closed. The above solution effectively prevents moisture from entering the door body; however, after prolonged use, the first sealing ring may fail and leak air, posing a risk of high-humidity air entering the door body and causing condensation on the viewing window, affecting the user experience. In view of this, this utility model is proposed. Utility Model Content

[0004] The problem solved by this invention is that the viewing area inside the door assembly of existing cooking appliances is prone to water vapor, which affects the user experience.

[0005] To address the aforementioned problems, this utility model provides a door assembly for cooking appliances, comprising a vertically arranged door frame, an inner door panel, and a front door panel. The inner door panel is disposed between the door frame and the front door panel, forming a high-temperature insulation cavity between the inner door panel and the door frame, and a low-temperature insulation cavity between the front door panel and the inner door panel. A first sealing ring is disposed within the low-temperature insulation cavity. The front door panel has a transparent window, and the first sealing ring is located on the outer periphery of the transparent window. The first sealing ring, the front door panel, and the inner door panel together enclose and form a window sealing cavity.

[0006] This design allows the window sealing cavity to be located within a low-temperature insulation cavity, ensuring uniform temperature conduction, stable temperature rise, and minimal temperature difference between the inside and outside, preventing the formation of water mist. Simultaneously, the window sealing cavity can completely isolate high-humidity gases in the air, preventing high-humidity air from entering the window area and forming water mist.

[0007] Preferably, the first sealing ring has a square rotating structure with rounded corners, and the sides of the first sealing ring are respectively bonded to the front door panel and the inner door panel.

[0008] This design maximizes the size of the transparent viewing window, allowing the product to exhibit a larger internal volume; at the same time, the rounded corner design prevents excessive wrinkling and sagging at the corners during assembly.

[0009] Preferably, the thickness of the first sealing ring is H1, and the minimum distance between the front door panel and the inner door panel is H2, where H1 < H2. This arrangement ensures that the first sealing ring is compressed and elastically deformed by the front and rear door panels after assembly, guaranteeing a good sealing effect and effectively preventing poor sealing after disassembly and reassembly.

[0010] Preferably, the distance between the edge of the transparent window and the first sealing ring is 7-15mm, and the longitudinal areas of the low-temperature insulation cavity of the window sealing cavity are S1 and S2, respectively, where S2 = (0.3-0.4)*S1. This arrangement ensures that the user cannot see the first sealing ring when looking through the front panel from the side, thus enhancing the product quality of the cooking appliance.

[0011] Preferably, the door assembly further includes an outer frame, and the door skeleton is disposed within the outer frame. A second sealing ring is disposed on the outer frame near the front door panel. The second sealing ring is located outside the first sealing ring and abuts against the front door panel on the side away from the outer frame. This arrangement creates a double-ring structure between the first and second sealing rings, achieving a double seal for the window sealing cavity.

[0012] Preferably, the second sealing ring has a U-shaped longitudinal section for positioning and fitting with the outer frame; a first rib is provided on the side of the second sealing ring near the front panel, and the first rib extends along the length of the second sealing ring. This arrangement allows for an interference fit between the front panel and the first rib, improving the sealing effect.

[0013] Preferably, the second sealing ring is shaped like an "U" with a notch at the bottom. This design reduces costs while blocking steam leaking from the high-temperature insulation cavity, effectively preventing leaked steam from entering the low-temperature insulation cavity.

[0014] Preferably, the door assembly further includes an outer frame and a reinforcing component. The door frame is disposed within the outer frame, and the reinforcing component is installed on the side of the front door panel near the door frame, located between the outer frame and the inner door panel. This arrangement allows the reinforcing component to form an intermediate heat-insulating structure, effectively controlling the temperature rise of the front door panel.

[0015] Preferably, the reinforcement component includes an upper bracket, an L-shaped buckle is provided on the side wall of the outer frame, a slot is provided on the upper bracket at a position corresponding to the L-shaped buckle, and the L-shaped buckle is limited and fitted into the slot; a limiting buckle is provided on the side wall of the outer frame, and a limiting groove is provided on the upper bracket at a position corresponding to the limiting buckle, and the limiting buckle is inserted into the limiting groove.

[0016] This design prevents the outer frame from deforming in the left-right and up-down directions at high temperatures, and avoids the gap between the outer frame and the second sealing ring from widening, which could lead to sealing failure.

[0017] Compared with the prior art, the door assembly described in this utility model embodiment has the following beneficial effects: 1) The window sealing cavity formed by the first sealing ring in the low-temperature insulation cavity can completely isolate the high-humidity gas in the air, and the temperature conduction is uniform, effectively preventing water mist from forming in the transparent window; 2) The size of the first sealing ring is larger than the transparent window, preventing the user from seeing it from the outside, resulting in a better user experience; 3) A second sealing ring is set around the first sealing ring, thereby achieving a double seal of the window sealing cavity; the structure is simple and the production cost is low.

[0018] This utility model also provides a cooking appliance, including the aforementioned door assembly and an inner cavity. The inner cavity has a vertically arranged front side plate with a first opening formed thereon. The door assembly is closable at the first opening, and a third sealing ring is provided on the side of the door assembly near the front side plate for sealing between the door assembly and the front side plate. The cooking appliance has the same beneficial effects as the door assembly, which will not be described in detail here. Attached Figure Description

[0019] Figure 1 This is an overall schematic diagram of the door assembly described in an embodiment of the present utility model;

[0020] Figure 2 This is an exploded view of the door assembly described in an embodiment of the present invention;

[0021] Figure 3 This is an exploded view of the door assembly described in an embodiment of the present invention from another perspective;

[0022] Figure 4 This is a cross-sectional schematic diagram of the door assembly described in an embodiment of the present utility model;

[0023] Figure 5 for Figure 4 A magnified view of a section at point A in the middle;

[0024] Figure 6 This is a cross-sectional view of the door assembly and the front panel of the cavity as described in this embodiment of the present invention.

[0025] Figure 7 for Figure 6 A magnified view of a section at point B in the middle;

[0026] Figure 8 This is an exploded view of the outer frame and the third sealing ring described in this embodiment of the utility model;

[0027] Figure 9 This is a schematic diagram of the assembly of the outer frame and the fixing components according to an embodiment of the present utility model.

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

[0029] 100-Door assembly; 1-Door frame; 2-Inner door panel; 3-Front door panel; 31-Transparent window; 32-Connector; 4-Rear door panel; 5-Outer frame; 51-Side wall; 511-Limit buckle; 512-L-shaped buckle; 52-T-shaped fold; 53-Insertion block; 6-First sealing ring; 7-Second sealing ring; 71-First rib; 8-Third sealing ring; 81-Mounting part; 811-First mounting groove; 812-Second protrusion; 813-Insertion hole; 82-Sealing part; 8 21. Second protruding rib; 822. First upright part; 823. Second upright part; 824. Free end; 9-Reinforcing component; 91. Upper bracket; 911. First connecting surface; 9111-Slot; 9112-Limiting groove; 912. Second connecting surface; 92. Lower bracket; 93. Left bracket; 94. Right bracket; 101-High temperature insulation cavity; 102-Low temperature insulation cavity; 103-Viewing window sealing cavity; 200-Inner cavity; 201-Front side panel; 202-Decorative panel. Detailed Implementation

[0030] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Without conflict, the technical features of the embodiments of this utility model can be combined with each other.

[0031] The directional terms such as "up," "down," "left," "right," "front," and "back" used in this application can be found in the appendix. Figure 1 The coordinate system in the diagram. In this utility model, the terms "first," "second," etc., are used 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.

[0032] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] like Figure 1-9 As shown, a door assembly 100 for cooking appliances includes a vertically arranged door frame 1, an inner door panel 2, and a front door panel 3. The inner door panel 2 is disposed between the door frame 1 and the front door panel 3, forming a high-temperature insulation cavity 101 between the inner door panel 2 and the door frame 1, and a low-temperature insulation cavity 102 between the front door panel 3 and the inner door panel 2. A first sealing ring 6 is disposed in the low-temperature insulation cavity 102. The front door panel 3 has a transparent window 31, and the first sealing ring 6 is located on the outer periphery of the transparent window 31. The first sealing ring 6, the front door panel 3, and the inner door panel 2 together enclose the window sealing cavity 103.

[0034] This configuration ensures that the viewing window sealing cavity 103 is located within the low-temperature insulation cavity 102, resulting in uniform temperature conduction, stable temperature rise, and a small temperature difference between the inside and outside, preventing the formation of water vapor. Simultaneously, the viewing window sealing cavity 103 completely isolates high-humidity gases from the air, preventing them from entering the viewing window area and forming water vapor. Preferably, the viewing window sealing cavity 103 is located in the middle region of the low-temperature insulation cavity 102, and the longitudinal areas of the viewing window sealing cavity 103 and the low-temperature insulation cavity 102 are S1 and S2, respectively, where S2 = (0.3-0.4)*S1.

[0035] Preferably, the first sealing ring 6 has a square rotary structure with rounded corners. This design maximizes the window size of the transparent viewing window 31, allowing the product to exhibit a larger internal volume; simultaneously, the rounded corners prevent excessive wrinkling or sagging at the corners during assembly. The inner door panel 2 can be one or more pieces.

[0036] Preferably, the two sides of the first sealing ring 6 are respectively bonded to the front door panel 3 and the inner door panel 2. This installation method is simple and reliable; at the same time, the front door panel 3 has the lowest temperature, so the double-sided adhesive has low temperature resistance requirements, effectively reducing product costs and increasing reliability. The number of the first sealing rings 6 can be one or more.

[0037] As an example of this utility model, the thickness of the first sealing ring 6 is H1, and the distance between the front door panel 3 and the inner door panel 2 is H2, where H1 < H2. This arrangement ensures that the first sealing ring 6 is compressed and elastically deformed by the front door panel 3 and the back door panel 2 after assembly, guaranteeing a good sealing effect and effectively preventing poor sealing after disassembly and reassembly. The interference fit of the first sealing ring 6 achieves a complete seal of the viewing window sealing cavity 103, effectively preventing moisture in the air from entering the viewing window sealing cavity 103 even if the second sealing ring 7 fails, thus not affecting the user's observation of the food cooking process. The material of the first sealing ring 6 is sponge or silicone.

[0038] Preferably, the distance between the edge of the transparent window 31 and the third sealing ring 6 is 7-15mm. This arrangement ensures that the user will not see the first sealing ring 6 when looking through the front panel 3 from the side, thus enhancing the product quality of the cooking appliance. As an example of this utility model, the minimum distance between the left, right, and lower edges of the transparent window 31 and the first sealing ring 6 is 15mm, and the minimum distance between the upper edge of the transparent window 31 and the first sealing ring 6 is 7mm.

[0039] As an example of this utility model, the door assembly 100 further includes an outer frame 5, the door frame 1 is disposed within the outer frame 5, and a second sealing ring 7 is disposed on the edge of the door front panel 3 and the outer frame 5. The second sealing ring 7 is located outside the first sealing ring 6 and abuts against the door front panel 3 on the side away from the outer frame 5, for forming the low-temperature insulation cavity 102. This arrangement enables the first sealing ring 6 and the second sealing ring 7 to form a double-ring structure, achieving double sealing of the window sealing cavity 103.

[0040] Preferably, the second sealing ring 7 has a U-shaped cross-section for positioning and fitting with the outer frame 5; the second sealing ring 7 has a first rib 71 on the side near the front panel 3, and the first rib 71 extends along the length of the second sealing ring 7. This arrangement allows for an interference fit between the front panel 3 and the first rib 71, improving the sealing effect.

[0041] Preferably, the second sealing ring 7 is shaped like an "U" and has a notch at the bottom. This design reduces costs and blocks steam leaking from the high-temperature insulation chamber 101, effectively preventing leaked steam from entering the low-temperature insulation chamber 102.

[0042] As an example of this utility model, the door assembly 100 further includes a third sealing ring 8, which includes a connected mounting portion 81 and a sealing portion 82. The outer frame 5 has a T-shaped flange 52 on the side away from the front door panel 3. A first mounting groove 811 is provided in the mounting portion 81 for limiting the assembly of the T-shaped flange 52. Since the first sealing ring 8 is the most important sealing component, it is subjected to the pressure of high temperature, high humidity and long-term aging, resulting in a relatively high failure rate. The door assembly 100 has a three-layer sealing structure, and the viewing window sealing cavity 103 can achieve a triple sealing effect under normal use.

[0043] Preferably, a plug-in block 53 is provided on one side of the T-shaped flange 52, and a plug hole 813 is provided at a corresponding position of the third sealing ring 8 at the plug-in block 53. The plug-in block 53 is fitted into the plug hole 813. This arrangement ensures that the third sealing ring 8 is securely fitted to the outer frame 5 and prevents it from loosening and falling out.

[0044] Preferably, the bottom of the mounting portion 81 is provided with a plurality of second protrusions 812 spaced apart. The second protrusions 812 extend along the length of the third sealing ring 8 and abut against the door frame 1. This arrangement ensures that the lower side of the third sealing ring 8 is deformed by pressure, thereby ensuring a good seal between it and the door frame 1 and preventing steam inside the cooking appliance from escaping from the third sealing ring 8.

[0045] As an example of this utility model, the sealing part 82 includes:

[0046] The first upright portion 822 extends from the mounting portion 81 in a direction away from the front panel 3;

[0047] The second erected portion 823 is connected to the end of the first erected portion 822 away from the mounting portion 81. The extension direction of the first erected portion 822 and the extension direction of the second erected portion 823 form an angle. Along the direction away from the first erected portion 822, the free end 824 of the second erected portion 823 is inclined downward and at least one second rib 821 is formed on its surface.

[0048] This arrangement allows the second upright portion 823 at the upper end of the sealing portion 82 to tilt downwards, thereby guiding water downwards to prevent water accumulation at the third sealing ring 8; by forming an angle between the extending directions of the first upright portion 822 and the second upright portion 823, when the door assembly 100 is closed, the sealing portion 82 can bend at its connection point, thereby applying pressure away from the front panel 3, which helps to further improve the sealing effect of the door assembly 100.

[0049] As an example of this utility model, the door assembly 100 further includes a reinforcing component 9, which is installed on the side of the front door panel 3 near the door frame 1, and is located between the outer frame 5 and the inner door panel 2. This arrangement can utilize the reinforcing component 9 to form an intermediate heat-insulating structure, effectively controlling the temperature rise of the front door panel 3. Preferably, the front door panel 3 is provided with a plurality of connectors 32 for fixing and assembling the reinforcing component 9.

[0050] As an example of this utility model, the reinforcing component 9 includes an upper support 91, a left support 93, a lower support 92, and a right support 94 disposed around the door frame 1. The upper support 91 has a first connecting surface 911 and a second connecting surface 912 disposed adjacent to each other. The first connecting surface 911 abuts against the outer frame 5, and the second connecting surface 912 abuts against the door frame 1.

[0051] Preferably, an L-shaped buckle 512 is provided on the inner side of the side wall 51 of the outer frame 5, and a slot 9111 is provided on the first connecting surface 911 at a position corresponding to the L-shaped buckle 512. The L-shaped buckle 512 is fitted into the slot 9111. This arrangement can prevent the outer frame 5 from bending and deforming in the vertical direction under high temperature conditions.

[0052] Preferably, a limiting buckle 511 is provided on the inner side of the side wall 51 of the outer frame 5, and a limiting groove 9112 is provided on the first connecting surface 911 at a position corresponding to the limiting buckle 511. The limiting buckle 511 is inserted into the limiting groove 9112. This arrangement can prevent the outer frame 5 from deforming in the left-right and up-down directions under high temperature; and avoid the situation where the gap between the outer frame 5 and the second sealing ring 7 increases and the seal fails.

[0053] As an example of this utility model, the door assembly 100 further includes a back door panel 4, which is located on the side of the door frame 1 away from the inner door panel 2. This arrangement can physically block the high-temperature gases from the cooking appliance, preventing heat from being directly conducted to the door frame 1, thereby helping the viewing window sealing cavity 103 to maintain a relatively low-temperature environment.

[0054] This utility model also provides a cooking appliance, including an inner cavity 200 and a door assembly 100. The inner cavity 200 has a vertically arranged front side plate 201, and a first opening is formed on the front side plate 201. The door assembly 100 is closably disposed at the first opening.

[0055] Preferably, the third sealing ring 8 is used to seal between the door assembly 100 and the front side panel 201. When the door assembly 100 is closed, the second rib 821 and the free end 824 are both interference-fitted with the front side panel 201. The inner cavity 200 also includes a decorative panel 202, which is located above the outer frame 5.

[0056] 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 door assembly for a cooking appliance, characterized in that, It includes a vertically arranged door frame (1), an inner door panel (2), and a front door panel (3). The inner door panel (2) is arranged between the door frame (1) and the front door panel (3). A high-temperature heat insulation cavity (101) is formed between the inner door panel (2) and the door frame (1), and a low-temperature heat insulation cavity (102) is formed between the front door panel (3) and the inner door panel (2). A first sealing ring (6) is arranged in the low-temperature heat insulation cavity (102). The front door panel (3) has a transparent viewing window (31). The first sealing ring (6) is located on the outer peripheral side of the transparent viewing window (31). The first sealing ring (6), the front door panel (3), and the inner door panel (2) jointly form a viewing window sealing cavity (103).

2. The door assembly according to claim 1, characterized in that, The first sealing ring (6) is integrally in a square rotary structure with rounded corners at four corners. The side parts of the first sealing ring (6) are adhesively connected to the front door panel (3) and the inner door panel (2) respectively.

3. The door assembly according to claim 2, characterized in that, The thickness of the first sealing ring (6) is H1, and the minimum distance between the front door panel (3) and the inner door panel (2) is H2, where H1 < H2.

4. The door assembly according to claim 1, characterized in that, The distance from the edge of the transparent viewing window (31) to the first sealing ring (6) is 7 - 15 mm. The longitudinal areas of the viewing window sealing cavity (103) and the low-temperature heat insulation cavity (102) are S1 and S2 respectively, where S2 = (0.3 - 0.4) * S1.

5. The door assembly according to claim 1, characterized in that, The door assembly (100) further includes an outer frame (5). The door frame (1) is arranged in the outer frame (5). A second sealing ring (7) is arranged on the side of the outer frame (5) close to the front door panel (3). The second sealing ring (7) is located on the periphery of the first sealing ring (6) and abuts against the front door panel (3) on the side far from the outer frame (5).

6. The door assembly according to claim 5, characterized in that, The longitudinal cross-section of the second sealing ring (7) is in a "U" shape for limit assembly with the outer frame (5). A first rib (71) is arranged on the side of the second sealing ring (7) close to the front door panel (3). The first rib (71) extends along the length direction of the second sealing ring (7).

7. The door assembly according to claim 6, characterized in that, The second sealing ring (7) is integrally in a "mouth" shape with a notch provided at the lower part.

8. The door assembly according to claim 1, characterized in that, The door assembly (100) further includes an outer frame (5) and a reinforcement assembly (9). The door frame (1) is arranged in the outer frame (5). The reinforcement assembly (9) is installed on the side of the front door panel (3) close to the door frame (1). The reinforcement assembly (9) is located between the outer frame (5) and the inner door panel (2).

9. The door assembly according to claim 8, characterized in that, The reinforcement assembly (9) includes an upper bracket (91). An L-shaped buckle (512) is arranged on the side wall (51) of the outer frame (5). A slot (9111) is arranged at the corresponding position on the upper bracket (91) relative to the L-shaped buckle (512). The L-shaped buckle (512) is limit-assembled into the slot (9111). A limit buckle (511) is arranged on the side wall (51) of the outer frame (5). A limit groove (9112) is arranged at the corresponding position on the upper bracket (91) relative to the limit buckle (511). The limit buckle (511) is inserted into the limit groove (9112).

10. A cooking appliance, characterized in that, The door assembly (100) according to any one of claims 1-9 further includes an inner cavity (200) having a vertically arranged front side plate (201) with a first opening formed thereon, and the door assembly (100) being closably disposed at the first opening; the door assembly (100) having a third sealing ring (8) provided on the side near the front side plate (201) for sealing between the door assembly (2) and the front side plate (201).

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