Oven

Abstract

The oven comprises an inner container and a baffle, the inner container is provided with an opening and comprises a back plate, the baffle is arranged close to the back plate, an inner cavity of the inner container is divided into a cooking cavity and a mounting cavity by the baffle, fan blades are arranged in the mounting cavity, a motor for driving the fan blades to rotate is arranged outside the inner container, the baffle comprises a top plate and side plates, and the top plate is provided with an air inlet and an air outlet. The air outlets comprise the first air outlets and the second air outlets, the first air outlets are formed in the left side and the right side of the top plate and close to the upper end of the top plate, and the second air outlets are formed in the left side and the right side of the top plate and close to the lower end of the top plate. And the first air guide plate is obliquely arranged towards one side of the first air outlet. By arranging the first air guide plate, part of air can flow into the cooking cavity along the first air guide plate and flow to the opening along the top wall of the cooking cavity, so that the part of air cannot be blocked by the baking tray or food, and airflow distribution in the cooking cavity is more uniform.

Description

Technical Field

[0001] The present application relates to the technical field of cooking appliances, and particularly to an oven. Background Art

[0002] In existing steam ovens, a hot air system is generally installed on the back of the inner cavity. The hot air generated by the hot air system is blown into the cooking cavity of the inner cavity through the hot air outlet on the baffle, and the air in the cooking cavity of the inner cavity is sucked into the back of the baffle through the air inlet on the baffle, forming a hot air circulation. The traditional hot air baffle adopts a closed front opening design, and the hot air fan blade adopts an open impeller.

[0003] The traditional air duct system only focuses on the uniformity of the air velocity distribution in a specific design layer (a single layer in the middle position of the cooking cavity of the oven). Therefore, when there is a lack of local air flow and a flow dead zone exists, local air flow can be supplemented by adjusting the openings on the front of the baffle. However, this also determines the biggest drawback of this design. When the user does not place the food on the design layer, the air flow ejected from the front openings cannot fall on the expected position, and the uniformity of the air flow distribution is broken, resulting in a large difference in cooking effects. Moreover, due to inevitable manufacturing process and assembly errors between multiple ovens, the cooking consistency performance is not good. Summary of the Utility Model

[0004] Based on this, it is necessary to provide an oven that can improve the uniformity of the air flow distribution in the cooking cavity.

[0005] An oven includes an inner cavity and a baffle disposed in the inner cavity. The inner cavity has an opening, and the inner cavity includes a back plate opposite to the opening. The baffle is disposed close to the back plate, and the baffle divides the inner cavity of the inner cavity into a cooking cavity and an installation cavity. A fan blade is disposed in the installation cavity, and a motor for driving the fan blade to rotate is disposed outside the inner cavity. The baffle includes a top plate and side plates surrounding the periphery of the top plate. The top plate is provided with an air inlet and an air outlet. The air outlet surrounds the air inlet. The air outlet includes a first air outlet and a second air outlet. The first air outlet is disposed on the left and right sides of the top plate and close to the upper end of the top plate. The second air outlet is disposed on the left and right sides of the top plate and close to the lower end of the top plate. The upper side edge of the first air outlet is provided with a first air guiding plate extending towards the installation cavity, and the first air guiding plate is inclined towards one side of the first air outlet.

[0006] In one embodiment, the included angle A1 between the first air guiding plate and the top plate is 45° - 75°; and / or, along the direction from the end where the first air guiding plate is connected to the top plate to the end far from the top plate, the length L1 of the first air guiding plate is 7 mm - 15 mm.

[0007] In one embodiment, the first air outlet is a square opening, the first air outlet is inclined at an angle θ with respect to the horizontal plane, θ < 45°, and both ends of the first air outlet extend towards the upper end and the side of the top plate respectively, and the first air deflector is arranged at the edge on the upper side of the extending direction of the first air outlet.

[0008] In one embodiment, θ is 10° to 30°; and / or, the first air deflector is formed by locally cutting and bending the top plate.

[0009] In one embodiment, a second air deflector extending towards the installation cavity is arranged at the edge of the second air outlet close to the side plate, and the second air deflector is inclined towards one side of the second air outlet.

[0010] In one embodiment, the included angle A2 between the second air deflector and the top plate is 25° to 50°; and / or, along the direction from the end where the second air deflector is connected to the top plate to the end far from the top plate, the length L2 of the second air deflector is 6 mm to 12 mm.

[0011] In one embodiment, the second air outlet is a square opening, and the second air outlet extends in the vertical direction.

[0012] In one embodiment, the second air deflector is formed by locally cutting and bending the top plate.

[0013] In one embodiment, a plurality of side air outlets are arranged on the side plate around the top plate; and / or, the side plate is hermetically connected to the back plate.

[0014] In one embodiment, two of the side air outlets are arranged on each of the upper, lower, left, and right sides of the side plate.

[0015] Compared with the prior art, for the oven provided in the present application, the air outlets are arranged around the air inlet, and the air outlets include a first air outlet and a second air outlet. The first air outlet is arranged on the left and right sides of the top plate and close to the upper end of the top plate, and the second air outlet is arranged on the left and right sides of the top plate and close to the lower end of the top plate. The air in the installation cavity can flow into the cooking cavity from around the air inlet, so that the air is evenly distributed in the cooking cavity. Moreover, by arranging a first air deflector extending towards the installation cavity at the upper side edge of the first air outlet, and the first air deflector is inclined towards one side of the first air outlet, by using the wall attachment effect of fluid mechanics, part of the air can flow into the cooking cavity along the first air deflector and flow towards the opening along the top wall of the cooking cavity, so that this part of the air will not be blocked by the baking tray or food, enabling this part of the air to reach the side of the cooking cavity close to the opening, thereby reducing the air flow dead zone in the cooking cavity and making the air flow distribution in the cooking cavity more uniform. Brief Description of the Drawings

[0016] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 Isometric view of an oven according to an embodiment of the present application;

[0018] Figure 2 Exploded view of an oven according to an embodiment of the present application;

[0019] Figure 3 Cross-sectional view of an oven according to an embodiment of the present application;

[0020] Figure 4 Isometric view of a baffle according to an embodiment of the present application;

[0021] Figure 5 Partial view of a baffle according to an embodiment of the present application;

[0022] Figure 6 Schematic diagram of the usage state of an oven according to an embodiment of the present application;

[0023] Figure 7 Isometric view of a fan blade according to an embodiment of the present application.

[0024] Reference numerals: 10, inner container; 11, opening; 12, back plate; 13, cooking cavity; 14, installation cavity; 20, baffle; 21, top plate; 211, air inlet; 212, first air outlet; 213, second air outlet; 22, side plate; 221, side air outlet; 23, first air guide plate; 24, second air guide plate; 30, fan blade; 31, base plate; 32, first blade; 33, second blade; 40, motor; 50, heating tube; 60, baking tray. Detailed Embodiments

[0025] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will provide a detailed description of the specific embodiments of the present application in conjunction with the drawings. Many specific details are set forth in the following description to facilitate a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the spirit of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0026] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are only for illustrative purposes and do not represent the only implementation.

[0027] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0028] In this application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first feature is in direct contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0029] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific implementations and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the related listed items.

[0030] Please refer to Figures 1 to 4, this application provides an oven, which includes an inner container 10 and a baffle 20 disposed inside the inner container 10. The inner container 10 has an opening 11, and the inner container 10 includes a back plate 12 disposed opposite to the opening 11. The baffle 20 is disposed close to the back plate 12, and the baffle 20 divides the inner cavity of the inner container 10 into a cooking cavity 13 and an installation cavity 14. A fan blade 30 is disposed in the installation cavity 14, and a motor 40 for driving the fan blade 30 to rotate is disposed outside the inner container 10. The baffle 20 includes a top plate 21 and side plates 22 surrounding the periphery of the top plate 21. An air inlet 211 and an air outlet are provided on the top plate 21, and the air outlet surrounds the air inlet 211. The air outlet includes a first air outlet 212 and a second air outlet 213. The first air outlet 212 is disposed on the left and right sides of the top plate 21 and close to the upper end of the top plate 21, and the second air outlet 213 is disposed on the left and right sides of the top plate 21 and close to the lower end of the top plate 21. A first air guiding plate 23 extending toward the installation cavity 14 is provided on the upper side edge of the first air outlet 212, and the first air guiding plate 23 is inclined toward one side of the first air outlet 212. Thus, under the drive of the motor 40, the fan blade 30 rotates, so that the air in the cooking cavity 13 flows into the installation cavity 14 from the air inlet 211 and flows back into the cooking cavity 13 from the air outlet, thereby forming a circulating air flow. Since the air outlet surrounds the air inlet 211, and the air outlet includes the first air outlet 212 and the second air outlet 213, the first air outlet 212 is disposed on the left and right sides of the top plate 21 and close to the upper end of the top plate 21, and the second air outlet 213 is disposed on the left and right sides of the top plate 21 and close to the lower end of the top plate 21, therefore, the air in the installation cavity 14 can flow into the cooking cavity 13 from the periphery of the air inlet 211, so that the air is evenly distributed in the cooking cavity 13. In the prior art, only an air outlet surrounding the air inlet is provided on the top surface of the baffle, and after the air is ejected from the air outlet, it flows toward the opening of the inner container. If the baking tray is not placed on the designed layer, resulting in the baking tray or the food in the baking tray blocking the air flow toward the opening of the inner container, it will cause uneven air flow distribution in the cooking cavity, and there is a large air flow dead zone on the side of the cooking cavity close to the opening, thereby affecting the cooking effect. In this application, a first air guiding plate 23 extending toward the installation cavity 14 is provided on the upper side edge of the first air outlet 212, and the first air guiding plate 23 is inclined toward one side of the first air outlet 212. By using the wall attachment effect of fluid mechanics, part of the air can flow into the cooking cavity 13 along the first air guiding plate 23 and flow along the top wall of the cooking cavity 13 toward the opening 11, so that this part of the air will not be blocked by the baking tray 60 or the food, enabling this part of the air to reach the side of the cooking cavity 13 close to the opening 11, thereby reducing the air flow dead zone in the cooking cavity 13 and making the air flow distribution in the cooking cavity 13 more uniform.

[0031] Please refer to Figure 3, It can be understood that a heating tube 50 is also provided in the installation cavity 14, and the heating tube 50 is arranged around the fan blade 30. In this way, the air blown from the installation cavity 14 into the cooking cavity 13 is hot air, and under the circulating flow of the hot air, the cooking speed can be rapidly increased.

[0032] Please refer to Figure 4 , in the present application, the air inlet 211 is provided at the central position of the top plate 21, and the air inlet 211 includes a plurality of small holes, and the plurality of small holes are arranged in a shape with a circular outer contour. The fan blade 30 is coaxially arranged with the air inlet 211, so that, under the action of the motor 40, the air in the cooking cavity 13 can flow back into the installation cavity 14 through the air inlet 211.

[0033] Further, please refer to Figure 5 , the included angle A1 between the first air guide plate 23 and the top plate 21 is 45° to 75°. In this way, the first air guide plate 23 has a good guiding effect on the air flow flowing into the cooking cavity 13 from the first air outlet 212, so that this part of the air flow can flow well along the first air guide plate 23 into the cooking cavity 13 and flow along the top wall of the cooking cavity 13. Specifically, the included angle A1 between the first air guide plate 23 and the top plate 21 can be 45°, 46°, 47°, 48°, 49°, 50°, 51°, 52°, 53°, 54°, 55°, 56°, 57°, 58°, 59°, 60°, 61°, 62°, 63°, 64°, 65°, 66°, 67°, 68°, 69°, 70°, 71°, 72°, 73°, 74°, 75°, or any other value within the range of 45° to 75°.

[0034] Further, along the direction from the end of the first air guide plate 23 connected to the top plate 21 to the end far from the top plate 21, the length L1 of the first air guide plate 23 is 7 mm to 15 mm. In this way, the air flow rate of the air flowing along the first air guide plate 23 and adhering to the wall is ensured, thereby ensuring further improvement of the air flow uniformity in the cooking cavity 13. Specifically, the length L1 of the first air guide plate 23 can be 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, or any other value within the range of 7 mm to 15 mm.

[0035] In this embodiment, the first air outlet 212 is a square opening 11, and the structure is very simple. Further, please refer to Figure 1, the first air outlet 212 is inclined at an angle θ with respect to the horizontal plane, where θ < 45°, and both ends of the first air outlet 212 extend towards the upper end and the side of the top plate 21. The first air deflector 23 is provided at the edge on the upper side of the extending direction of the first air outlet 212. In this way, the air flow flowing into the cooking cavity 13 along the first air deflector 23 will not only flow along the top wall of the cooking cavity 13, but also flow along the upper part of the side wall of the cooking cavity 13, thereby reducing the occurrence of air dead zones at the connection between the top wall and the side wall of the cooking cavity 13, and making the air flow distribution in the cooking cavity 13 more uniform.

[0036] In this embodiment, θ is 10° to 30°. In this way, it is ensured that the air flow flowing into the cooking cavity 13 along the first air deflector 23 flows along the top wall of the cooking cavity 13 and passes through the connection area between the top wall and the side wall of the cooking cavity 13, avoiding the occurrence of air dead zones in this area, and further improving the uniformity of the air flow distribution in the cooking cavity 13. Specifically, θ can be 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, 24°, 25°, 26°, 27°, 28°, 29°, 30°, or any other value within the range of 10° to 30°.

[0037] In one embodiment, the first air deflector 23 is formed by locally cutting and bending the top plate 21. In this way, the structure is simple and easy to process, and the surface of the first air deflector 23 facing the first air outlet 212 is more smoothly connected to the surface of the top plate 21 facing the opening 11, which is beneficial to guiding the air flow to flow into the cooking cavity 13 along the wall.

[0038] Please refer to Figure 1 and Figure 4 , further, a second air deflector 24 extending towards the installation cavity 14 is provided at the edge of the second air outlet 213 close to the side plate 22, and the second air deflector 24 is inclined towards one side of the second air outlet 213. Since the baked food is usually placed in the baking tray 60, and the baking tray 60 is hung on the side wall of the inner container 10 by the upper flanging. There is usually a certain gap between the side wall of the main body of the baking tray 60 and the side wall of the inner container 10. During use, if the baking tray 60 is placed at a position directly facing the second air outlet 213, or the food in the baking tray 60 is at a position directly facing the second air outlet 213, the air flowing into the cooking cavity 13 from the second air outlet 213 cannot reach the side of the cooking cavity 13 close to the opening 11. In this embodiment, by providing the second air deflector 24, using the wall attachment effect of fluid mechanics, part of the air can flow into the cooking cavity 13 along the second air deflector 24 and flow along the side wall of the cooking cavity 13 towards the opening 11, so that this part of the air will not be blocked by the baking tray 60 or the food, enabling this part of the air to reach the side of the cooking cavity 13 close to the opening 11, and further improving the uniformity of the air flow distribution in the cooking cavity 13.

[0039] Further, please refer to Figure 5 , the included angle A2 between the second air deflector 24 and the top plate 21 is 25° to 50°. In this way, the second air deflector 24 has a good guiding effect on the air flow flowing into the cooking cavity 13 from the second air outlet 213, so that this part of the air flow can flow well along the second air deflector 24 into the cooking cavity 13 and flow along the side wall of the cooking cavity 13. Specifically, the included angle A2 between the second air deflector 24 and the top plate 21 can be 25°, 26°, 27°, 28°, 29°, 30°, 31°, 32°, 33°, 34°, 35°, 36°, 37°, 38°, 39°, 40°, 41°, 42°, 43°, 44°, 45°, 46°, 47°, 48°, 49°, 50°, or any other value within the range of 25° to 50°.

[0040] Further, along the direction from the end where the second air deflector 24 is connected to the top plate 21 to the end far from the top plate 21, the length L2 of the second air deflector 24 is 6 mm to 12 mm.

[0041] In this embodiment, the second air outlet 213 is a square opening 11, and the second air outlet 213 extends in the vertical direction. In this way, the structure of the second air outlet 213 is very simple. The second air outlet 213 extends in the vertical direction, and the second air deflector 24 is arranged at the edge of the second air outlet 213 close to the side plate 22, which can well guide the air to the side wall of the cooking cavity 13 and flow along the side wall of the cooking cavity 13 to the opening 11.

[0042] In one embodiment, the second air deflector 24 is formed by locally cutting and bending the top plate 21. In this way, the structure is simple and easy to process, and the surface of the second air deflector 24 facing the second air outlet 213 and the surface of the top plate 21 facing the opening 11 are more smoothly connected, which is beneficial to guiding the air flow to flow into the cooking cavity 13 along the wall.

[0043] In this embodiment, a first air outlet 212 is provided on each of the left and right sides of the top plate 21, and a second air outlet 213 is provided on each of the left and right sides of the top plate 21. The number of air outlets is small, which avoids the problem of large cumulative errors caused by too many openings in the manufacturing process and assembly, so as to ensure the consistency of multiple ovens in mass production, and the appearance is also more beautiful.

[0044] Further, please refer to Figure 4 , a plurality of side air outlets 221 are provided on the side plate 22 around the top plate 21. In this way, the air in the installation cavity 14 can also flow into the cooking cavity 13 through the side air outlets, and the air flowing into the cooking cavity 13 from the side air outlets 221 can flow along the wall, thereby further reducing the air flow dead zone in the cooking cavity 13 and improving the uniformity of the air flow distribution in the cooking cavity 13.

[0045] In this embodiment, the top plate 21 is roughly square, and the side plate 22 is provided with two side air outlets 221 on each of the upper, lower, left and right sides of the top plate 21, that is, a total of 8 side air outlets 221 are provided on the side plate 22. Among them, the two side air outlets 221 on the upper side guide the airflow to flow upward, so that it flows along the top wall of the cooking cavity 13 to the outlet; the two side air outlets 221 on the lower side guide the airflow to flow downward, so that it flows along the bottom wall of the cooking cavity 13 to the outlet; the four side air outlets 221 on the left and right sides guide the airflow to flow toward the side wall of the cooking cavity 13 and flow toward the outlet. Under the rotation of the fan blades 30, the air located on the side close to the outlet in the cooking cavity 13 can flow back to the installation cavity 14 through the air inlet 211, thereby realizing the circulation of air.

[0046] In one embodiment, the oven is provided with three layers of baking tray 60 placement areas, namely, the upper layer, the middle layer and the lower layer. When using a single baking tray 60 for cooking, the baking tray 60 can be placed in any layer of the upper layer, the middle layer and the lower layer, usually in the middle layer; when using two baking trays 60 for cooking, the baking trays 60 are usually placed in the upper layer and the lower layer. Figure 6 As shown. Conventional ovens can usually only ensure uniform airflow distribution when a single baking tray is placed in the middle layer for cooking. When two baking trays are placed in the upper and lower layers for cooking, there will be a problem of uneven wind speed distribution. In the present application, a first air guide plate 23 is provided at the first air outlet 212, a second air guide plate 24 is provided at the second air outlet 213, and a side air outlet 221 is provided on the side plate 22 of the baffle 20. The overall air outlet logic is: the airflow coming out of all these air outlets (including the first air outlet 212, the second air outlet 213 and the side air outlet 221) first flows to the inner wall of the cooking cavity 13, and then flows to the vicinity of the outlet of the cooking cavity 13 according to the fluid mechanics wall attachment effect, and finally flows back to the installation cavity 14 from the air inlet 211. In this way, an embracing return air flow can be formed in the cooking cavity 13, the overall airflow velocity distribution is relatively uniform, and the velocity vector in the Y direction (vertical direction) of the airflow is eliminated, so that each layer will obtain a uniform airflow distribution, thereby achieving uniform cooking and double-layer cooking.

[0047] For further information, see Figure 3 The side plate 22 is sealed and connected to the back plate 12. In this way, air leakage at the connection between the side plate 22 and the back plate 12 can be avoided, and the air flow is ensured to flow along the designed channel, that is, from the first air outlet 212, the second air outlet 213 and the side air outlet 221 to the cooking cavity 13, and flows back to the installation cavity 14 from the air inlet 211.

[0048] See also Figure 2 and Figure 7, in this embodiment, the motor 40 is a DC brushless motor, which has a large power, a large torque, a high efficiency and can achieve forward and reverse rotation. In one embodiment, the fan blade 30 includes a substrate 31 and a plurality of first blades 32 disposed on one side of the substrate 31. The first blades 32 are located on the side of the substrate 31 facing the cooking cavity 13. Thus, the fan blade 30 is a semi-open impeller. The efficiency of the semi-open impeller is higher than that of the open impeller of the same size, and the air volume can be slightly increased. By matching the DC brushless motor 40 with the semi-open impeller, the present application can provide a sufficiently large air volume, thereby further improving the uniformity of the air flow distribution in the cooking cavity 13. Further, the fan blade 30 may further include second blades 33 disposed on the other side of the substrate 31. The second blades 33 are used to dissipate heat from the motor 40, thereby avoiding the overheating of the motor 40 during long-term operation and ensuring the normal operation of the motor 40.

[0049] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0050] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. An oven, comprising an inner container and a baffle disposed in the inner container, wherein the inner container has an opening, the inner container comprises a back plate disposed opposite to the opening, the baffle is disposed close to the back plate, and the baffle divides the inner cavity of the inner container into a cooking cavity and an installation cavity, a fan blade is disposed in the installation cavity, and a motor for driving the fan blade to rotate is disposed outside the inner container, It is characterized in that The baffle includes a top plate and side plates surrounding the top plate, the top plate is provided with an air inlet and an air outlet, the air outlet is arranged around the air inlet, the air outlet includes a first air outlet and a second air outlet, the first air outlet is arranged on the left and right sides of the top plate and is arranged close to the upper end of the top plate, the second air outlet is arranged on the left and right sides of the top plate and is arranged close to the lower end of the top plate, the upper side edge of the first air outlet is provided with a first air guide plate extending toward the installation cavity, and the first air guide plate is inclined toward one side of the first air outlet.

2. The oven according to claim 1, characterized in that: The included angle A1 between the first air guide plate and the top plate is 45° to 75°; And / or, along a direction from one end of the first air guide plate connected to the top plate to one end away from the top plate, a length L1 of the first air guide plate is 7 mm to 15 mm.

3. The oven according to claim 1, characterized in that: The first air outlet is a square opening, and the first air outlet is inclined at an angle θ relative to the horizontal plane, θ<45°, and the two ends of the first air outlet extend toward the upper end and the side of the top plate respectively, and the first air guide plate is arranged at the edge on the upper side of the extension direction of the first air outlet.

4. The oven according to claim 3, characterized in that: θ is 10°~30°; And / or, the first air guide plate is formed by partially cutting and bending the top plate.

5. The oven according to claim 1, characterized in that: A second air guide plate extending toward the installation cavity is provided at an edge of the second air outlet close to the side plate, and the second air guide plate is inclined toward one side of the second air outlet.

6. The oven according to claim 5, characterized in that: The angle A2 between the second air guide plate and the top plate is 25° to 50°; And / or, along a direction from one end of the second air guide plate connected to the top plate to one end away from the top plate, a length L2 of the second air guide plate is 6 mm to 12 mm.

7. The oven according to claim 5, characterized in that: The second air outlet is a square opening, and the second air outlet extends in a vertical direction.

8. The oven according to claim 7, characterized in that: The second air guide plate is formed by partially cutting and bending the top plate.

9. The oven according to any one of claims 1 to 8, characterized in that: The side panels are provided with a plurality of side air outlets around the top panel; and / or the side panels are sealed and connected to the back panel.

10. The oven according to claim 9, characterized in that The side plate is provided with two side air outlets respectively on the upper, lower, left and right sides of the top plate.

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