Cover and cooking appliance having the same

Abstract

The present invention provides a cover body and a cooking appliance having the same. The cover body includes: a cover body main body having a first air duct, the first air duct extending from the rear side of the cover body main body towards the middle of the cover body main body; a flow guiding structure disposed in the first air duct, the first air duct having an air inlet, a first air guiding surface extending downward is formed on the surface of the flow guiding structure close to the air inlet, the first air guiding surface is an arc surface protruding towards the air inlet in the middle, and both ends in the length direction of the first air guiding surface are spaced apart from the air duct wall of the first air duct. Applying the technical solution of the present invention can effectively solve the problem that food is prone to uneven heating during baking in the related art.

Description

Technical Field

[0001] The present invention relates to the field of small household appliances, and more particularly, to a lid and a cooking appliance having the same. Background Art

[0002] In the existing side-inlet air fryer, an air inlet is provided on the side of the lid. Since the shape of the air inlet does not match the shape of the cookware, the heat field in the cooking cavity is uneven, resulting in uneven heating of the food in the pot during cooking, and it is easy to cause some parts of the cooked food to be burnt and some parts to be undercooked. Summary of the Invention

[0003] The main object of the present invention is to provide a lid and a cooking appliance having the same, so as to solve the problem that the food is easily unevenly heated during baking in the related art.

[0004] To achieve the above object, according to one aspect of the present invention, a lid is provided, including: a lid body having a first air duct extending from the rear side of the lid body to the middle of the lid body; a guiding structure disposed in the first air duct. The first air duct has an air inlet, and a first air guiding surface extending downward is formed on the surface of the guiding structure close to the air inlet. The first air guiding surface is an arc surface protruding toward the air inlet in the middle, and both ends in the length direction of the first air guiding surface are spaced from the air duct wall of the first air duct.

[0005] Applying the technical solution of the present invention, the hot air entering from the air inlet will contact the first air guiding surface. Under the guiding of the first air guiding surface, part of the air blows directly downward to blow to the rear side of the cooking cavity; another part of the air flows along the length direction of the first air guiding surface to the left and right sides of the lid and is guided to the inner side wall of the lid body. This part of the hot air can blow to the edge of the cooking cavity and the front side of the cooking cavity under the guiding of the inner side wall of the lid body. The above structure enables hot air to flow into the front side, rear side, left and right sides of the cooking cavity, so that the heat field in the cooking cavity is more uniform, solves the problem that the food in the pot is easily unevenly heated during baking, and improves the taste of the food.

[0006] Further, the guiding structure includes a first air guiding plate, and a first air guiding surface is formed on the surface of the first air guiding plate close to the air inlet. An air flow port is provided between the upper edge of the first air guiding plate and the lid body. The above structure is simple, easy to process, and has a low cost. In addition, the above structure opens an air flow port on the first air guiding plate, so that part of the hot air entering from the air inlet is guided by the guiding structure, and the other part directly passes through the air flow port and flows to the front side of the lid to ensure that enough hot air enters the front side of the cooking cavity, making the heat field in the cooking cavity more uniform.

[0007] Further, the cover body includes a cover top wall and a cover side wall. The channel formed by the cover top wall and the cover side wall forms a first air duct. A downwardly recessed flow-through notch is provided on the edge of the first air guide plate close to the cover top wall, and the flow-through notch forms a flow-through opening. The above structure is simple and easy to process.

[0008] Further, the length L of the flow-through opening in the horizontal direction perpendicular to the air inlet direction is between 50 mm and 200 mm. If the length L of the flow-through opening is too long or too short, the corresponding amount of hot air flowing to the front side of the cover body will be too much or too little. Therefore, a moderate length L of the flow-through opening can ensure the uniformity of the temperature field in the cooking cavity. And / or, the height H1 of the flow-through opening is between 2 mm and 20 mm. If the height H1 of the flow-through opening is too high, the air guiding area of the first air guide plate will be reduced, resulting in a decrease in the amount of hot air flowing to the rear side of the cooking cavity, which is not conducive to the uniformity of the heat field in the cooking cavity. If the height H1 of the flow-through opening is too low, the amount of hot air flowing to the front side of the cover body will be too little, which is also not conducive to the uniformity of the heat field in the cooking cavity.

[0009] Further, the first air guide plates are arranged at intervals along the air inlet direction. The height of the flow-through opening on the first air guide plate close to the air inlet is higher than that on the first air guide plate far from the air inlet, and the length of the first air guide plate close to the air inlet is less than that of the first air guide plate far from the air inlet. The above structure increases the air blowing points of the cover body blowing downward in the front-rear direction, so that the hot air blown into the front, rear, and middle parts of the cooking cavity is uniform, improving the uniformity of the heat field in the cooking cavity.

[0010] Further, the radius of the first air guiding surface is between 100 mm and 130 mm. If the radius of the first air guiding surface is too small, the hot air is not easily guided to the cover side wall after contacting the first air guiding surface, resulting in a lower heat in the edge part of the cooking cavity. If the radius of the first air guiding surface is too large, the air resistance is large and the flow splitting effect is poor, and the hot air basically flows to the rear side of the cooking cavity. And / or, the ratio of the minimum distance D3 between the two ends of the first air guiding surface and the air duct wall to the inner diameter of the cover body is between 1:20 and 3:20. If the minimum distance D3 is too small, the amount of hot air flowing to the front side of the cover body is too little, resulting in a lower heat in the front side of the cooking cavity. If the minimum distance D3 is too large, the amount of hot air flowing to the rear side of the cover body is too little, resulting in a lower heat in the rear side of the cooking cavity.

[0011] Further, the flow guiding structure further includes a second air guide plate. The second air guide plate is arranged on the side of the first air guide plate far from the air inlet, and the surface of the second air guide plate close to the first air guide plate forms a second air guiding surface. The above structure increases the air blowing points of the cover body blowing downward in the front-rear direction and the left-right direction, so that the hot air blown into the front, rear, edge, and middle parts of the cooking cavity is uniform, improving the uniformity of the heat field in the cooking cavity.

[0012] Further, both ends of the second air deflector in the length direction are connected to the first air deflector. The above structure enables the first air deflector and the second air deflector to enclose an air guide tube, guiding to the middle of the cooking cavity to ensure sufficient heat in the middle of the cooking cavity.

[0013] Further, the cover body includes a cover top wall and a cover side wall. The channel formed by the cover top wall and the cover side wall forms a first air duct. The angle α between the first air guiding surface and / or the second air guiding surface and the cover top wall is between 90° and 150°. If the angle α is too small, the first air guiding surface and the second air guiding surface will deflect the inflowing hot air in the direction opposite to the air inlet direction, forming a turbulent flow, which is not conducive to air outlet and affects the cooking efficiency. If the angle α is too large, most of the air will be guided to the front side of the cooking cavity, resulting in lower heat in the rear side of the cooking cavity.

[0014] Further, the ratio of the distance D1 between the middle of the first air guiding surface and the center of the cover body to the inner diameter of the cover body is between 1:3 and 1:5; and / or, the second air guiding surface is an arc surface protruding away from the air inlet in the middle. The ratio of the distance D2 between the middle of the second air guiding surface and the center of the cover body to the inner diameter of the cover body is between 1:7 and 1:9. The above structure enables the added air blowing points to be arranged more evenly in the front-back direction of the cover, ensuring the uniformity of the heat field in the cooking cavity.

[0015] Further, the height H2 of the air guiding structure is between 10 mm and 70 mm; and / or, the air guiding structure is provided with a mounting structure, and the air guiding structure is fixed to the cover body through the mounting structure. If the height H2 of the air guiding structure is too high, it will protrude from the lower surface of the cover body, thus affecting the placement of the cover; in addition, when the height H2 of the air guiding structure is too high, the further improvement of the air guiding effect is not obvious, and the cost is high.

[0016] Further, the cover further includes: an extended cover, arranged at the rear side of the cover body. The extended cover has a second air duct inside, and the first air duct and the second air duct are communicated through an air inlet. The above structure is simple and easy to process.

[0017] Further, the cover body includes a housing, a lining and a transparent plate. An observation port is provided on the housing, the transparent plate is covered below the observation port, the lining is arranged below the housing, the air guiding structure is fixed to the lining through the mounting structure, and an air outlet is provided on the transparent plate. The above structure enables the user to observe the food in the cooking cavity, facilitating cooking.

[0018] According to another aspect of the present invention, there is provided a cooking appliance, including: an appliance body; a cover, covering the appliance body, and the cover is the above-mentioned cover. Since the above cover has the advantage of uniform air guiding, the heat field in the cooking cavity of the cooking appliance having it is uniform. Description of the Drawings

[0019] The accompanying drawings of the specification, which form a part of this application, are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0020] Figure 1 A three-dimensional structural schematic diagram of an embodiment of the cover body according to the present invention is shown from one angle;

[0021] Figure 2 It shows Figure 1 A three-dimensional structural schematic diagram of the cover body from another angle;

[0022] Figure 3 It shows Figure 1 A longitudinal sectional structural schematic diagram of the cover body;

[0023] Figure 4 It shows Figure 1 A bottom view schematic diagram of the cover body;

[0024] Figure 5 It shows Figure 1 A three-dimensional structural schematic diagram of the flow guiding structure of the cover body;

[0025] Figure 6 It shows Figure 5 A longitudinal sectional structural schematic diagram of the flow guiding structure; and

[0026] Figure 7 It shows Figure 5 A front view of the flow guiding structure.

[0027] Among them, the above-mentioned drawings include the following reference numerals:

[0028] 1, the first air duct; 2, the air inlet; 3, the second air duct; 10, the cover body main body; 11, the cover body top wall; 12, the cover body side wall; 13, the outer shell; 131, the observation port; 14, the inner lining; 15, the transparent plate; 151, the air outlet; 20, the flow guiding structure; 21, the first air guiding surface; 22, the first air guiding plate; 23, the flow through port; 24, the second air guiding plate; 25, the second air guiding surface; 30, the mounting structure; 40, the extended cover; 50, the cover body. Detailed Embodiments

[0029] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0030] As Figures 1 to 5As shown in the figure, the lid of this embodiment includes: a lid body 10 and a flow guiding structure 20. Among them, the lid body 10 has a first air duct 1, and the first air duct 1 extends from the rear side of the lid body 10 towards the middle of the lid body 10. The flow guiding structure 20 is arranged in the first air duct 1. The first air duct 1 has an air inlet 2. The surface of the flow guiding structure 20 close to the air inlet 2 forms a first air guiding surface 21 extending downward. The first air guiding surface 21 is an arc surface protruding towards the air inlet 2 in the middle. The two ends in the length direction of the first air guiding surface 21 are spaced from the duct wall of the first air duct 1.

[0031] Applying the technical solution of this embodiment, the hot air entering from the air inlet 2 will contact the first air guiding surface 21. Under the guidance of the first air guiding surface 21, part of the air blows directly downward to blow towards the rear side of the cooking cavity; the other part of the air flows along the length direction of the first air guiding surface 21 to the left and right sides of the lid and is guided to the inner side wall of the lid body 10. This part of the hot air can blow towards the edge of the cooking cavity and the front side of the cooking cavity under the guidance of the inner side wall of the lid body 10. The above structure enables hot air to flow into the front side, rear side, left and right sides of the cooking cavity, so that the heat field in the cooking cavity is more uniform, solves the problem that the food in the pot is prone to uneven heating during baking, and improves the taste of the food.

[0032] As Figures 1 to 5 shown in the figure, in this embodiment, the flow guiding structure 20 includes a first air guiding plate 22. The surface of the first air guiding plate 22 close to the air inlet 2 forms a first air guiding surface 21. An air passing port 23 is arranged on the upper edge of the first air guiding plate 22. The above structure is simple, easy to process, and has low cost. In addition, the above structure opens the air passing port 23 on the first air guiding plate 22, so that part of the hot air entering from the air inlet 2 is guided by the flow guiding structure 20, and the other part directly passes through the air passing port 23 and flows to the front side of the lid to ensure that there is enough hot air entering the front side of the cooking cavity, making the heat field in the cooking cavity more uniform. Of course, in other embodiments not shown in the figure, the air passing port can also be arranged at the position of the lid body corresponding to the upper edge of the first air guiding plate, or arranged on both the first air guiding plate 22 and the lid body. The above two methods can both ensure that there is enough hot air entering the front side of the cooking cavity, making the heat field in the cooking cavity more uniform.

[0033] As Figures 1 to 3 and Figure 5 shown in the figure, in this embodiment, the lid body 10 includes a lid top wall 11 and a lid side wall 12. The channel formed by the lid top wall 11 and the lid side wall 12 forms a first air duct 1. An air passing notch recessed downward is arranged on the edge of the first air guiding plate 22 close to the lid top wall 11, and the air passing notch forms an air passing port 23. The above structure is simple and easy to process.

[0034] As Figure 2 , Figure 5and Figure 7 As shown, in this embodiment, the length L of the air flow port 23 in the horizontal direction perpendicular to the air inlet direction is between 50 mm and 200 mm. If the length L of the air flow port 23 is too long or too short, the amount of hot air flowing towards the front side of the cover will be correspondingly too much or too little. Therefore, a proper length L of the air flow port 23 can ensure the uniformity of the temperature field in the cooking cavity.

[0035] As Figure 2 , Figure 5 and Figure 6 As shown, in this embodiment, the height H1 of the air flow port 23 is between 2 mm and 20 mm. If the height H1 of the air flow port 23 is too high, the air guiding area of the first air guiding plate 22 will be reduced, resulting in a decrease in the amount of hot air guiding towards the rear side of the cooking cavity, which is not conducive to the uniformity of the heat field in the cooking cavity. If the height H1 of the air flow port 23 is too low, the amount of hot air flowing towards the front side of the cover will be too small, which is also not conducive to the uniformity of the heat field in the cooking cavity.

[0036] In other embodiments, the first air guiding plates are multiple and arranged at intervals along the air inlet direction. The height of the air flow port on the first air guiding plate closer to the air inlet is higher than that on the first air guiding plate farther from the air inlet, and the length of the first air guiding plate closer to the air inlet is less than that of the first air guiding plate farther from the air inlet. Specifically, the hot air entering from the air inlet will contact the previous first air guiding surface. Under the guiding of this first air guiding surface, part of the air blows directly downward to blow towards the rear side of the cooking cavity; part of the air flows along the length direction of the first air guiding surface towards the left and right sides of the cover and is guided to the inner side wall of the cover body; another part of the air flows through the air flow port on the previous first air guiding plate to the next first air guiding plate, and the hot air continues to be guided and divided under the guiding action of the next first air guiding plate, and so on. The above structure increases the blowing points of the cover blowing downward in the front-rear direction, so that the hot air blown into the front, rear, and middle parts of the cooking cavity is uniform, improving the uniformity of the heat field in the cooking cavity.

[0037] As Figure 4 As shown, in this embodiment, the radius of the first air guiding surface 21 is between 100 mm and 130 mm. If the radius of the first air guiding surface 21 is too small, the hot air is not easily guided to the side wall 12 of the cover after contacting the first air guiding surface 21, resulting in a lower heat in the edge part of the cooking cavity. If the radius of the first air guiding surface 21 is too large, the wind resistance is large and the diversion effect is poor, and the hot air basically flows to the rear side of the cooking cavity.

[0038] As Figure 4As shown, in this embodiment, the ratio of the minimum distance D3 between both ends of the first air guiding surface 21 and the air duct wall to the inner diameter of the cover body 10 is between 1:20 and 3:20. If the minimum distance D3 is too small, the hot air volume flowing towards the front side of the cover is too small, resulting in a lower heat quantity at the front side of the cooking cavity. If the minimum distance D3 is too large, the hot air volume flowing towards the rear side of the cover is too small, resulting in a lower heat quantity at the rear side of the cooking cavity.

[0039] As Figures 1 to 5 shown, in this embodiment, the guiding structure 20 further includes a second air guiding plate 24. The second air guiding plate 24 is disposed on a side of the first air guiding plate 22 away from the air inlet 2. A second air guiding surface 25 is formed on a surface of the second air guiding plate 24 close to the first air guiding plate 22. Specifically, the hot air entering from the air inlet will contact the first air guiding surface 21. Under the guiding of the first air guiding surface 21, a part of the air blows directly downward to blow towards the rear side of the cooking cavity; a part of the air flows along the length direction of the first air guiding surface 21 towards the left and right sides of the cover and is guided to the inner side wall of the cover body; another part of the air flows through the air passing opening on the first air guiding surface 21 to the second air guiding surface 25. Under the air guiding effect of the second air guiding surface 25, the hot air continues to be guided and divided. A part of the air blows directly downward to blow towards the middle of the cooking cavity; a part of the air flows along the length direction of the second air guiding surface 25 towards the left and right sides of the cover and then blows downward, so that the hot air received in the middle of the cooking cavity is more uniform. The above structure increases the air blowing points of the cover blowing downward in the front-rear direction and the left-right direction, thereby making the hot air blown into the front part, rear part, edge and middle part of the cooking cavity uniform and improving the uniformity of the thermal field in the cooking cavity.

[0040] As Figure 1 、 Figure 2 、 Figure 4 and Figure 5 shown, in this embodiment, both ends in the length direction of the second air guiding plate 24 are connected to the first air guiding plate 22. The above structure enables the first air guiding plate 22 and the second air guiding plate 24 to enclose an air guiding cylinder, guiding towards the middle of the cooking cavity and ensuring sufficient heat in the middle of the cooking cavity.

[0041] As Figures 2 to 4 shown, in this embodiment, the cover body 10 includes a cover top wall 11 and a cover side wall 12. The channel formed by the cover top wall 11 and the cover side wall 12 forms a first air duct 1. The angle α between the first air guiding surface 21 and / or the second air guiding surface 25 and the cover top wall 11 is between 90° and 150°. If the angle α is too small, the first air guiding surface 21 and the second air guiding surface 25 will guide the inflowing hot air in a direction opposite to the air inlet direction, forming a turbulent flow, which is not conducive to air outlet and affects the cooking efficiency. If the angle α is too large, most of the air will be guided to the front side of the cooking cavity, resulting in a lower heat quantity at the rear side of the cooking cavity.

[0042] AsFigure 4 As shown, in this embodiment, the ratio of the distance D1 between the center of the first air guiding surface 21 and the center of the cover body 10 to the inner diameter of the cover body 10 is between 1:3 and 1:5. The second air guiding surface 25 is an arc surface protruding away from the air inlet 2 in the middle. The ratio of the distance D2 between the center of the second air guiding surface 25 and the center of the cover body 10 to the inner diameter of the cover body 10 is between 1:7 and 1:9. The above structure makes the added blowing points arranged more evenly in the front-back direction of the cover, ensuring the uniformity of the thermal field in the cooking cavity. Of course, in other embodiments not shown in the figure, it may only satisfy that the ratio of the distance D1 between the center of the first air guiding surface 21 and the center of the cover body 10 to the inner diameter of the cover body 10 is between 1:3 and 1:5, or only satisfy that the ratio of the distance D2 between the center of the second air guiding surface 25 and the center of the cover body 10 to the inner diameter of the cover body 10 is between 1:7 and 1:9.

[0043] It should be noted that, as Figures 1 to 4 shown, in this embodiment, the cover body 10 includes an outer shell 13, a lining 14, and a transparent plate 15. An observation port 131 is provided on the outer shell 13. The transparent plate 15 is covered below the observation port 131. The lining 14 is provided below the outer shell 13. The air guiding structure 20 is fixed to the lining 14 through a mounting structure 30. An air outlet 151 is provided on the transparent plate 15. The above structure enables the user to observe the food in the cooking cavity, facilitating cooking. In addition, in this embodiment, both the transparent plate 15 and the lining 14 are semi-circular, and the transparent plate 15 is located on the front side of the lining 14. It is required that the ratio of the distance D1 between the center of the first air guiding surface 21 and the center of the cover body 10 to the inner diameter of the cover body 10 is between 1:3 and 1:5. The ratio of the distance D2 between the center of the second air guiding surface 25 and the center of the cover body 10 to the inner diameter of the cover body 10 is between 1:7 and 1:9. That is, it is required that the center of the air guiding structure 20 is biased towards the lining 14 side, so as to avoid the area below the transparent plate 15 as much as possible and minimize the occlusion of the visible area by the air guiding structure 20.

[0044] As Figure 6 shown, in this embodiment, the height H2 of the air guiding structure 20 is between 10 mm and 70 mm. If the height H2 of the air guiding structure 20 is too high, it will protrude from the lower surface of the cover body 10, thus affecting the placement of the cover. In addition, if the height H2 of the air guiding structure 20 is too high, the further improvement of the air guiding effect is not obvious, and the cost is high.

[0045] As Figure 4 and Figure 5 shown, in this embodiment, a mounting structure 30 is provided on the air guiding structure 20. The air guiding structure 20 is fixed to the cover body 10 through the mounting structure 30. The above structure is simple and convenient for assembly.

[0046] As Figure 1 and Figure 2 shown, in this embodiment, the cover body further includes: an extension cover 40, which is arranged at the rear side of the cover body main body 10. A second air duct 3 is provided inside the extension cover 40, and the first air duct 1 is communicated with the second air duct 3 through an air inlet 2. The above structure is simple and easy to process.

[0047] This application also provides a cooking appliance. The cooking appliance according to the embodiment of this application includes: an appliance main body and a cover body 50 (as Figure 1 shown). Among them, the cover body 50 is covered on the appliance main body, and the cover body 50 is the above-mentioned cover body. Since the above cover body has the advantage of uniform air guiding, the thermal field in the cooking cavity of the cooking appliance with it is uniform.

[0048] It should be noted that, in this embodiment, a heating device is provided on the appliance main body. The heating device includes a housing and a heating wire. A heating air duct is provided inside the housing, and the heating wire is arranged in the heating air duct. The air duct outlet of the heating air duct is arranged at the upper part of the housing, and the upper part of the housing extends into the second air duct of the extension cover 40 so that the heating air duct is communicated with the second air duct 3. The above extension cover 40 can play a role in accommodation, reduce the height of the overall cooking appliance, and thus achieve the purpose of miniaturized design.

[0049] It should be noted that the cooking appliance includes an air fryer, or a rice cooker, or an electric pressure cooker, or a multifunctional heating pot with baking, cooking, and cooking functions.

[0050] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cover body, characterized in that, Comprising: A cover body main body (10) having a first air duct (1), and the first air duct (1) extends from the rear side of the cover body main body (10) towards the middle of the cover body main body (10); A flow guiding structure (20) is arranged in the first air duct (1). The first air duct (1) has an air inlet (2). A first air guiding surface (21) extending downward is formed on the surface of the flow guiding structure (20) near the air inlet (2). The first air guiding surface (21) is an arc surface protruding towards the air inlet (2) in the middle. Both ends in the length direction of the first air guiding surface (21) are spaced from the duct wall of the first air duct (1); The flow guiding structure (20) includes a first air guiding plate (22). The first air guiding surface (21) is formed on the surface of the first air guiding plate (22) near the air inlet (2). An air passing opening (23) is arranged between the upper edge of the first air guiding plate (22) and the cover body main body (10); The cover body further includes: An extension cover (40) is arranged at the rear side of the cover body main body (10). A second air duct (3) is provided in the extension cover (40). The first air duct (1) is communicated with the second air duct (3) through the air inlet (2).

2. The cover body according to claim 1, characterized in that, The cover body main body (10) includes a cover body top wall (11) and a cover body side wall (12). A channel formed by the cover body top wall (11) and the cover body side wall (12) forms the first air duct (1). A downward concave air passing notch is arranged on the edge of the first air guiding plate (22) near the cover body top wall (11), and the air passing notch forms the air passing opening (23).

3. The cover according to claim 2, characterized in that, The length L of the air passing opening (23) in the horizontal direction perpendicular to the air inlet direction is between 50 mm and 200 mm; and / or, the height H1 of the air passing opening (23) is between 2 mm and 20 mm.

4. The cover according to claim 2, characterized in that, The first air guiding plates (22) are arranged at intervals along the air inlet direction. The height of the air passing opening (23) on the first air guiding plate (22) near the air inlet (2) is higher than the height of the air passing opening (23) on the first air guiding plate (22) far from the air inlet (2), and the length of the first air guiding plate (22) near the air inlet (2) is smaller than the length of the first air guiding plate (22) far from the air inlet (2).

5. The cover according to claim 1, characterized in that, The radius of the first air guiding surface (21) is between 100 mm and 130 mm; and / or, the ratio of the minimum distance D3 between both ends of the first air guiding surface (21) and the duct wall to the inner diameter of the cover body main body (10) is between 1:20 and 3:

20.

6. The cover according to claim 1, characterized in that, The flow guiding structure (20) further includes a second air guiding plate (24). The second air guiding plate (24) is arranged on the side of the first air guiding plate (22) far from the air inlet (2). A second air guiding surface (25) is formed on the surface of the second air guiding plate (24) near the first air guiding plate (22).

7. The cover according to claim 6, characterized in that, Both ends in the length direction of the second air guiding plate (24) are connected to the first air guiding plate (22).

8. The cover according to claim 6, characterized in that, The cover body (10) includes a cover top wall (11) and a cover side wall (12). A channel formed by the cover top wall (11) and the cover side wall (12) forms the first air duct (1). The angle α between the first air guiding surface (21) and / or the second air guiding surface (25) and the cover top wall (11) is between 90° and 150°.

9. The cover according to claim 6, characterized in that, The ratio of the distance D1 between the middle of the first air guiding surface (21) and the center of the cover body (10) to the inner diameter of the cover body (10) is between 1:3 and 1:5; and / or, the second air guiding surface (25) is an arc surface protruding away from the air inlet (2) in the middle. The ratio of the distance D2 between the middle of the second air guiding surface (25) and the center of the cover body (10) to the inner diameter of the cover body (10) is between 1:7 and 1:

9.

10. The cover according to claim 1, characterized in that, The height H2 of the flow guiding structure (20) is between 10 mm and 70 mm; and / or, an installation structure (30) is provided on the flow guiding structure (20), and the flow guiding structure (20) is fixed to the cover body (10) through the installation structure (30).

11. The cover according to claim 1, characterized in that The cover body (10) includes a housing (13), a lining (14), and a transparent plate (15). An observation port (131) is provided on the housing (13). The transparent plate (15) is disposed below the observation port (131). The lining (14) is disposed below the housing (13). The flow guiding structure (20) is fixed to the lining (14) through the installation structure (30). An air outlet (151) is provided on the transparent plate (15).

12. A cooking appliance, comprising: An appliance body; A cover body (50) covering the appliance body, wherein the cover body (50) is the cover body according to any one of claims 1 to 11.

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