Oven

By incorporating a heat-insulating layer and an inclined heat-insulating structure on the inside of the oven door handle, the problem of burns caused by heat transfer from the oven door handle is solved, achieving a compact design and cost reduction.

CN223817402UActive Publication Date: 2026-01-23CHUNMI TECHNOLOGY (SHANGHAI) CO LTD
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Patent Information

Application Number
CN202423322731.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-31
Publication Date
2026-01-23
Estimated Expiration
2034-12-31

AI Technical Summary

Technical Problem

In existing ovens, heat can easily be transferred to the door handle during use, causing burns to users. Furthermore, the independent handle structure increases material consumption and size, while the cooling fan structure increases costs and has noise and reliability issues.

Method used

An integrated recessed handle is installed on the furnace door, and a heat insulation material layer is installed on the inside of the handle. Combined with the inclined heat insulation structure and baffle assembly, the heat inside the furnace cavity is prevented from being transferred to the handle.

Benefits of technology

It effectively isolates heat from the door handle, preventing burns, reducing material usage and size, lowering costs, and improving user experience and aesthetic appearance.

✦ Generated by Eureka AI based on patent content.

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Abstract

An oven relates to the technical field of household appliances and comprises an oven chamber, an oven door, a handle concavely arranged on the oven door and a heat insulation material layer arranged on the inner side of the handle and facing the direction of the oven chamber, the oven door is rotatably connected to the oven chamber and used for sealing the oven chamber, and the heat insulation material layer is used for preventing heat in the oven chamber from being transmitted to the handle. By the adoption of the technical scheme, when the oven is used, part of heat in the oven cavity is absorbed by food, the other part of heat is transmitted to the surface of the oven door through the oven cavity, the heat is blocked through the heat insulation material layer arranged on the handle of the oven door, and therefore the heat in the oven cavity is effectively blocked before being transmitted to the handle, and the oven is more convenient to use. Therefore, it is guaranteed that the temperature of the handle is not too high, the risk that a user is scalded when opening the oven door is avoided, the structure is compact, the production cost is low, practicability is high, and the user experience is good.
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Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, specifically to an oven. Background Technology

[0002] An oven is a kitchen appliance that uses heat radiation from electric or gas heating elements to bake food. It can be used to process bread, cakes, cookies and other pasta, as well as to roast chicken, meat and fish and other meats.

[0003] Because ovens generate high temperatures during use, some of this heat is absorbed by the food, while the rest is transferred through the oven cavity to the outer surface of the oven and the oven door, causing the oven surface temperature to rise, especially the outer surface of the oven door. To prevent users from being burned when opening the oven door, most existing ovens use an independent handle structure. However, this independent handle structure requires more materials and makes the oven larger, affecting its appearance and space occupation. Some ovens on the market use a cooling fan structure to improve the oven's heat dissipation efficiency, but this increases costs and also raises issues with noise and lifespan reliability. Utility Model Content

[0004] The purpose of this utility model is to solve the problems in the existing technology where an independent handle structure is set on the oven to prevent users from being burned when opening the oven door. This requires more materials, increases the size of the oven, affects the appearance and space occupied, and uses a cooling fan structure to improve the heat dissipation efficiency of the oven, which increases the cost. At the same time, there are also problems with noise and lifespan reliability. This utility model provides an oven.

[0005] The technical solution adopted by this utility model is: an oven, characterized in that it includes an oven cavity, an oven door, a handle recessed on the oven door, and a heat insulation material layer disposed on the inside of the handle and facing the oven cavity. The oven door is rotatably connected to the oven cavity for sealing the oven cavity, and the heat insulation material layer is used to prevent heat in the oven cavity from being transferred to the handle.

[0006] Optionally, the furnace door includes an inner lining plate, and the heat insulation material layer is disposed between the inside of the handle and the inner lining plate.

[0007] Optionally, the insulation material layer is inclined, and the angle between the insulation material layer and the inner lining plate is 5°-45°.

[0008] Optionally, the heat insulation material layer is provided with a heat insulation structure on the periphery facing the furnace cavity.

[0009] Optionally, the furnace door further includes a door frame located on the side of the inner lining plate away from the furnace cavity, the handle is recessed in the door frame, and the heat insulation structure includes a first baffle group located on the door frame and surrounding the heat insulation material layer, the handle being accommodated in the area formed by the first baffle group.

[0010] Optionally, the thermal insulation structure further includes a second set of baffles located on the underside of the thermal insulation material layer of the inner lining plate.

[0011] Optionally, the inner lining panel cooperates with the door frame to form an accommodating space, and the handle, the heat insulation material layer, the first baffle group, and the second baffle group are all located within the accommodating space.

[0012] Optionally, a fixed column is provided in the accommodating space, one end of which is fixedly connected to the door frame, and the other end of which passes through the heat insulation material layer and is fixedly connected to the inner lining plate.

[0013] Optionally, the handle is provided with an abutment block on the side facing the inner lining plate for abutting against the insulation material layer.

[0014] Optionally, the insulation material layer is insulation cotton.

[0015] After adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0016] This application effectively isolates heat transferred from the oven cavity to the door handle by integrating a door handle into the oven door body and installing heat insulation cotton inside the oven door body at the corresponding position of the door handle. This prevents the user from being burned when opening the oven door due to heat being transferred from the oven cavity to the door handle during oven use. It eliminates the need for a separate handle, maintains the oven's aesthetic appearance, reduces the space occupied by the oven, has a compact structure, strong practicality, and improves the user experience. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this embodiment;

[0019] Figure 2 This is in this embodiment Figure 1 A partial exploded view;

[0020] Figure 3This is a cross-sectional view of this embodiment;

[0021] Figure 4 This is in this embodiment Figure 3 Enlarged view of section A;

[0022] Figure 5 This is an exploded view in this embodiment used to show the positional relationship between the inner lining panel, door frame, handle and thermal insulation material layer;

[0023] Figure 6 This is a schematic diagram illustrating the assembly relationship between the first baffle group, the handle, and the door frame in this embodiment;

[0024] Figure 7 This is in this embodiment Figure 6 Enlarged view of section B;

[0025] Figure 8 This is a schematic diagram illustrating the assembly relationship between the second baffle group and the inner lining plate in this embodiment.

[0026] Explanation of reference numerals in the attached drawings: 10, furnace cavity; 11, heating element; 12, supporting rib; 20, furnace door; 201, accommodating space; 202, fixing column; 21, inner lining plate; 22, door frame; 23, glass door; 24, circuit board; 25, knob; 30, handle; 31, abutment block; 40, heat insulation material layer; 401, through hole; 51, first baffle group; 52, second baffle group; 60, outer shell; 70, base; 80, rear cover; 81, heat dissipation hole; 90, locking element; 91, locking protrusion; 92, locking groove. Detailed Implementation

[0027] The following will refer to the appendix in the embodiments of this utility model. Figure 1-8 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0028] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0029] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if the word "and / or" appears throughout the text, it means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0030] This embodiment relates to an oven, see reference Figures 1-8 The furnace includes a furnace cavity 10, a furnace door 20, a handle 30 recessed in the furnace door 20, and a heat insulation material layer 40 disposed on the inner side of the handle 30 facing the furnace cavity 10. The furnace cavity 10 is a furnace cavity with a top opening or a side opening. The furnace door 20 is rotatably connected to the opening of the furnace cavity 10 and is used to close the opening of the furnace cavity 10. The handle 30 is integrally formed with the furnace door 20 and is located on the side wall of the furnace door 20. The heat insulation material layer 40 is located inside the furnace door 20 and is used to block the heat in the furnace cavity 10 from being transferred to the handle 30.

[0031] Reference Figure 1 and Figure 2 In a preferred embodiment, the furnace door 20 is connected to the bottom of the furnace cavity 10 by a hinge or hinge, and the door is opened by rotating from top to bottom. In other embodiments, the furnace door 20 may also be connected to the left or right side of the furnace cavity 10 by a hinge or hinge, and the door is opened by rotating from left to right or from right to left.

[0032] Compared to existing technologies that use independent handles or cooling fans to dissipate heat from the oven interior, this application integrates a handle 30 into the oven door 20 body and places heat-insulating cotton inside the oven door 20 body at the position corresponding to the handle 30. This effectively blocks heat from the oven cavity 10 before it reaches the handle 30, preventing burns to the user when opening the oven door 20 body due to the heat from the oven cavity 10 being transferred to the handle 30. This eliminates the need for an independent handle, reducing material usage and space occupation, while maintaining the aesthetic appeal. It also eliminates the need for cooling fans and other heat dissipation structures, thus reducing production costs.

[0033] Furthermore, referring to Figure 3 , Figure 4and Figure 5 The furnace door 20 includes an inner lining plate 21, which contacts the furnace cavity 10. A heat insulation material layer 40 is disposed between the inside of the handle 30 and the inner lining plate 21.

[0034] Understandably, placing the heat insulation layer 40 between the inside of the handle 30 and the inner lining plate 21 allows the heat in the furnace cavity 10 to dissipate towards the furnace door 20. The heat will first pass through the inner lining plate 21 and the heat insulation layer 40 between the inside of the handle 30 and the inner lining plate 21, thus blocking the heat and making it difficult for the heat to be transferred to the handle 30. This reduces the temperature of the handle 30 and prevents users from getting burned by touching the handle 30.

[0035] Furthermore, referring to 3 and Figure 4 The insulation material layer 40 is inclined, and the angle between the insulation material layer 40 and the inner lining plate 21 is 5°-45°.

[0036] The heat insulation material layer 40 is inclinedly placed between the inner side of the handle 30 and the inner lining plate 21, so that the heat insulation material layer 40 can play a good role in isolating the heat dissipated from the furnace cavity 10 to the handle 30, and the angle formed between the heat insulation material layer 40 and the inner lining plate 21 is best between 5° and 45°.

[0037] Furthermore, it should be noted that in other embodiments, the heat insulation material layer 40 may be disposed in other forms between the inner side of the handle 30 and the inner lining plate 21, and the tilt angle of the heat insulation material may also be adjusted, such as being vertically disposed, completely or partially covering the inner side of the handle 30, completely or partially filling the space between the inner lining plate 21 and the inner side of the handle 30, etc. The embodiment shown here is a preferred implementation method, and no further limitations will be made here.

[0038] Furthermore, the insulation material layer 40 has an insulation structure on all four sides facing the furnace cavity 10.

[0039] A heat insulation structure is provided around the side of the heat insulation material layer 40 facing the furnace cavity 10. When the heat in the furnace cavity 10 is dissipated to the heat insulation material layer 40 and is isolated by the heat insulation material layer 40, it will not be dissipated towards the handle 30 under the action of the heat insulation structure, thereby further improving the heat insulation effect on the handle 30.

[0040] Furthermore, referring to Figure 5 and Figure 6 The furnace door 20 also includes a door frame 22 located on the side of the inner lining plate 21 away from the furnace cavity 10, and a handle 30 recessed in the door frame 22. The heat insulation structure includes a first baffle group 51 located on the door frame 22 and surrounding the heat insulation material layer 40, and the handle 30 is housed in the area formed by the first baffle group 51.

[0041] Understandably, the handle 30 is placed on the door frame 22 and housed within the area formed by the first baffle group 51. At the same time, the first baffle group 51 on the door frame 22 blocks the heat radiated from the furnace cavity 10 to the heat insulation material layer 40, preventing the heat from radiating outward, thereby achieving the blocking of the heat radiated from the furnace cavity 10.

[0042] Furthermore, referring to Figure 8 The thermal insulation structure also includes a second baffle group 52 disposed on the lower side of the inner lining plate 21 corresponding to the thermal insulation material layer 40.

[0043] The second baffle group 52 further encloses the heat insulation material layer 40, making the heat insulation effect better. At the same time, with the cooperation of the first baffle group 51 and the second baffle group 52, the heat insulation material layer 40 can be limited, making it difficult for the heat insulation material layer 40 to shift, thereby ensuring the heat insulation effect of the handle 30.

[0044] Furthermore, referring to Figure 5 , Figure 6 and Figure 7 The inner lining 21 and the door frame 22 cooperate to form an accommodating space 201. The handle 30, the heat insulation material layer 40, the first baffle group 51 and the second baffle group 52 are all located in the accommodating space 201.

[0045] An accommodating area 201 is formed in the upper part of the inner lining plate 21 and the door frame 22, and the handle 30, the heat insulation material layer 40, the first baffle group 51 and the second baffle group 52 are all located in the accommodating area 201. This way, a part of the heat emitted from the furnace cavity 10 toward the handle 30 will be isolated outside the accommodating area 201, and the other part of the heat will enter the accommodating area 201 and be blocked by the heat insulation material layer 40, the first baffle group 51 and the second baffle group 52, which further improves the insulation effect of the heat emitted from the furnace cavity 10 toward the handle 30.

[0046] Furthermore, a fixing post 202 is provided in the accommodating space 201. The fixing post 202 is located between the door frame 22 and the inner lining plate 21. One end of the fixing post 202 is fixedly connected to the door frame 22, and the other end of the fixing post 202 passes through the heat insulation material layer 40 and is fixedly connected to the inner lining plate 21. A through hole (not shown in the figure) is opened on the heat insulation material layer 40 for the fixing post 202 to pass through.

[0047] By setting the fixing column 202, the connection between the door frame 22 and the inner lining plate 21 is realized. At the same time, it also plays a role in positioning and fixing the heat insulation material layer 40, so that the heat insulation material layer 40 can stably insulate the handle 30 within the accommodating space 201.

[0048] Furthermore, a plurality of abutment blocks 31 are provided on the side of the handle 30 that contacts the heat insulation material layer 40. The plurality of abutment blocks 31 are evenly distributed on the side of the handle 30 that contacts the heat insulation material layer 40, and each of the plurality of abutment blocks 31 has an arc-shaped portion that contacts the edge of the heat insulation material layer 40.

[0049] By setting the abutment block 31, the heat insulation material layer 40 contacts the handle 30 through point contact, thereby further improving the heat insulation effect of the handle 30.

[0050] Furthermore, in this embodiment, the heat insulation material layer 40 is heat insulation cotton.

[0051] Thermal insulation cotton has excellent thermal insulation, fire resistance, and sound insulation properties, and is environmentally friendly and low in cost. Therefore, in this embodiment, thermal insulation cotton is used as the raw material for thermal insulation layer 40. In other embodiments, thermal insulation layer 40 can be made of materials with thermal insulation properties such as glass wool, polyurethane foam, and pearl cotton. Alternatively, multiple materials with thermal insulation properties such as glass wool, polyurethane foam, and pearl cotton can be combined to form thermal insulation layer 40. No further limitations are made here.

[0052] In addition, the furnace door 20 in this embodiment also includes a glass door 23 fixedly disposed on the side of the door frame 22 away from the inner lining plate 21.

[0053] Adding a glass door 23 to the door frame 22 can enhance the aesthetic appeal of the oven door 20, thus improving the overall appearance of the oven. In other embodiments, the glass door 23 can be replaced with a door made of other decorative materials, such as an acrylic door or a plastic door. Specific adjustments can be made based on actual circumstances, and no further limitations are specified here.

[0054] Furthermore, combined Figure 2 and Figure 3 A heating element 11 is provided on the inner or outer wall of the oven cavity 10. In this embodiment, the heating element 11 is an electric heating element 11, and the electric heating element 11 is a heating tube. The heating tube is bent and wrapped around the top of the inner wall of the oven cavity 10, and the heating tube is fixed by a fixing member, so that the heating tube can stably provide heat to the oven cavity 10, thereby realizing the heating of food.

[0055] The furnace door 20 is provided with a circuit board 24 for controlling the operation of the heating element 11. The circuit board 24 is located between the inner lining plate 21 and the door frame 22. The glass door 23 is provided with a knob 25 that is electrically connected to the circuit board 24 and is used to control the operation of the heating element 11. The knob 25 is located below the handle 30.

[0056] When using the oven, the heating element 11 can be activated by rotating the knob 27, thus heating the food.

[0057] Furthermore, it should be noted that in other embodiments, the heating element 11 is not limited to the heating tube and the distribution of the heating tube. The setting position of the circuit board 24 can also be adjusted according to the actual situation. For example, the circuit board 24 can be set on the top of the furnace cavity 10, the knob 25 can be replaced with multiple buttons, and / or the circuit board 24 can be integrated into a display screen and the display screen can be installed on the furnace door 20 or the furnace cavity 10.

[0058] Furthermore, combined Figure 3 The oven also includes an outer shell 60, a base 70, and a rear cover 80. The oven cavity 10 is housed within the outer shell 60, with a gap between the cavity and the outer shell 60. The oven door 20 is rotatably connected to the front end of the outer shell 60 (i.e., the lower side of the opening of the oven cavity 10) via hinges, pivots, or other means. The handle 30 is located away from the connection end between the oven door 20 and the outer shell 60, and when the oven door 20 closes the oven cavity 10, the handle 30 is positioned above or below the opening of the oven cavity 10, or to the left or right. The base 70 is fixedly installed on the bottom side of the outer shell 60 to support the outer shell 60 and the oven cavity 10. In this embodiment, the base 70 consists of two symmetrically mounted legs on the bottom of the outer shell 60. In other embodiments, the base 70 can also be configured in other shapes, which are not limited here. The rear cover 80 is fastened to the rear end of the outer shell 60 (i.e., the side of the outer shell 60 facing away from the oven door 20), and both the base 70 and the rear cover 80 are provided with several ventilation holes 81.

[0059] The outer casing 60 protects the furnace cavity 10 from impacts and damage. The gap between the furnace cavity 10 and the outer casing 60 allows heat from the furnace cavity 10 to escape through the heat dissipation holes 81 on the base 70 and rear cover 80, effectively reducing the surface temperature of the outer casing 60 and minimizing the risk of burns to the user. By positioning the handle 30 above, below, or to the left or right of the opening of the furnace cavity 10—meaning it is not directly opposite the opening but offset—heat emitted from the furnace cavity 10 must first be transferred to the furnace door 20 and the outer casing 60 before reaching the handle 30, further ensuring the heat insulation effect of the handle 30.

[0060] In this embodiment, in order to enable the furnace door 20 to stably close the furnace cavity 10, a locking member 90 for locking the furnace door 20 is provided between the inner lining plate 21 facing the furnace cavity 10 and the outer shell 60.

[0061] Specifically, refer to Figure 2 , Figure 3 and Figure 4The locking element 90 includes a locking flange 91 disposed on the inner lining plate 21 and a locking groove 92 formed on the outer shell 60 for engaging with the locking flange 91. The locking flange 91 is integrally formed with the inner lining plate 21 and is located at the end of the inner lining plate 21 near the handle 30. The locking groove 92 is correspondingly disposed to the locking flange 91, and when the furnace door 20 rotates relative to the furnace cavity 10 to close the furnace cavity 10, the locking flange 91 extends into the locking groove 92 and engages with it.

[0062] When the furnace door 20 needs to be opened, by reaching into the handle 30 and rotating the furnace door 20 relative to the furnace cavity 10 in a direction away from the furnace cavity 10, the locking protrusion 91 separates from the locking groove 92, thereby releasing the lock between the furnace door 20 and the outer shell 60, allowing the furnace door 20 to be opened smoothly. When the furnace door 20 needs to be closed, by rotating the furnace door 20 relative to the furnace cavity 10 in a direction closer to the furnace cavity 10, the locking protrusion 91 on the inner lining plate 21 of the furnace door 20 can engage with the locking groove 92 on the outer shell 60, thereby achieving a stable closure of the furnace door 20.

[0063] In addition, the two inner sides of the furnace cavity 10 are provided with support ribs 12, which are used to support the material trays or partition plates. In this embodiment, three long support ribs 12 and two short support ribs 12 are provided on each of the two inner side walls of the furnace cavity 10, wherein the two short support ribs 12 are respectively arranged in the intervals between the three long support ribs 12. In other embodiments, the number and distribution of support ribs 12 can be adjusted accordingly according to the actual situation.

[0064] The working principle of this utility model is roughly as follows: When using the oven, the food to be baked or cooked is placed into the cavity, and then the oven door 20 is driven to rotate. The locking protrusion 91 on the inner lining plate 21 of the oven door 20 and the locking groove 92 on the outer shell 60 are engaged to achieve a stable seal of the oven door 20. When the oven is working, the heating element 11 generates heat under the control of the circuit board 24. Part of the heat is absorbed by the food, and the other part of the heat is transferred to the surface of the oven door 20 through the oven cavity 10. This application uses the heat insulation material layer 40 and the heat insulation structure provided at the handle 30 of the oven door 20 to block the heat, so that the heat in the oven cavity 10 is effectively blocked before it is transferred to the handle 30, thereby ensuring that the temperature of the handle 30 is not too high and avoiding the risk of the user being burned when opening the oven door 20.

[0065] The above is only used to illustrate the technical solution of this utility model and not to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. An oven, characterized in that, It includes a furnace cavity (10), a furnace door (20), a handle (30) recessed in the furnace door (20), and a heat insulation material layer (40) located inside the handle (30) and facing the furnace cavity (10). The furnace door (20) is rotatably connected to the furnace cavity (10) to seal the furnace cavity (10), and the heat insulation material layer (40) is used to block the heat in the furnace cavity (10) from being transferred to the handle (30).

2. An oven according to claim 1, characterized in that, The furnace door (20) includes an inner lining plate (21), and the heat insulation material layer (40) is disposed between the inside of the handle (30) and the inner lining plate (21).

3. An oven according to claim 2, characterized in that, The heat insulation material layer (40) is inclined, and the angle between the heat insulation material layer (40) and the inner lining plate (21) is 5°-45°.

4. An oven according to claim 2 or 3, characterized in that, The insulation material layer (40) has an insulation structure on all four sides facing the furnace cavity (10).

5. An oven according to claim 4, characterized in that, The furnace door (20) also includes a door frame (22) located on the side of the inner lining plate (21) away from the furnace cavity (10), and the handle (30) is recessed in the door frame (22). The heat insulation structure includes a first baffle group (51) located on the door frame (22) and surrounding the heat insulation material layer (40). The handle (30) is accommodated in the area formed by the first baffle group (51).

6. An oven according to claim 5, characterized in that, The thermal insulation structure also includes a second baffle group (52) disposed on the lower side of the inner lining plate (21) corresponding to the thermal insulation material layer (40).

7. An oven according to claim 6, characterized in that, The inner lining plate (21) and the door frame (22) cooperate to form an accommodating space (201), and the handle (30), the heat insulation material layer (40), the first baffle group (51) and the second baffle group (52) are all located in the accommodating space (201).

8. An oven according to claim 7, characterized in that, A fixing column (202) is provided in the accommodating space (201). One end of the fixing column (202) is fixedly connected to the door frame (22), and the other end of the fixing column (202) passes through the heat insulation material layer (40) and is fixedly connected to the inner lining plate (21).

9. An oven according to claim 8, characterized in that, The handle (30) is provided with an abutment block (31) on the side facing the inner lining plate (21) for abutting against the heat insulation material layer (40).

10. An oven according to claim 1, characterized in that, The heat insulation material layer (40) is heat insulation cotton.