Fan baffle, fan assembly and cooking equipment

Abstract

The invention relates to a fan baffle, a fan assembly and cooking equipment. The fan baffle comprises a ventilation plate and a covering part, an air return opening is formed in the ventilation plate in a penetrating mode, the covering part is connected to the ventilation plate and is aligned to the air return opening, and a gap exists between the covering part and the ventilation plate in the thickness direction of the ventilation plate to form a first air return channel communicating with the air return opening. The covering part is provided with a second air return channel which is separated from the first air return channel and communicates with the air return opening. According to the fan baffle provided in the scheme, by arranging the first air return channel and the second air return channel which are both communicated with the air return port, two air return channels are provided, a double-channel structure is achieved, the air inlet area of a fan assembly is increased, the airflow stability and convergence are enhanced, the circulating air volume in the cooking equipment is further increased, the air volume of fan blades is increased, and the cooking efficiency is improved. The cooking time is shortened.

Description

Technical Field

[0001] The present application relates to the technical field of kitchen appliances, and in particular to a fan baffle, a fan assembly and a cooking device. Background Art

[0002] Cooking equipment, such as steam ovens, typically has a hot air system installed at the back of the inner pot. This system connects to the cooking chamber inside the pot via a hot air blower baffle, creating a hot air circulation system. Specifically, hot air generated by the hot air blower in the hot air system is blown into the inner pot through the hot air outlet on its baffle. The air inside the pot is then drawn back through the return air vent on the hot air blower baffle, creating a hot air circulation system.

[0003] In the prior art, the hot air blower baffle adopts a front air return method, which has a poor and unstable air return effect, affecting the uniformity of food baking. Summary of the Invention

[0004] Based on this, it is necessary to provide a fan baffle, a fan assembly and a cooking device to address the problem of uneven food baking caused by poor and unstable return air effect of the fan baffle in the existing cooking device.

[0005] A fan baffle, comprising a ventilation plate and a cover, wherein the ventilation plate is provided with a return air port extending therethrough. The cover is connected to the ventilation plate and is positioned opposite the return air port. A gap is formed between the cover and the ventilation plate in the thickness direction of the ventilation plate to form a first return air passage communicating with the return air port. The cover is provided with a second return air passage spaced apart from the first return air passage and communicating with the return air port.

[0006] In one embodiment, the ventilation plate includes an outer ring plate, a transition section and an inner ring plate connected in sequence, the return air outlet is opened at the inner ring plate, and the outer ring plate and the inner ring plate have a height difference in the thickness direction of the ventilation plate.

[0007] In one embodiment, the transition section includes a first lifting portion and a first descending portion that are connected and smoothly transitioned, the first lifting portion is inclined at an upward slope toward the inner ring plate, the first descending portion is inclined at a downward slope toward the inner ring plate, and the height difference of the first lifting portion is smaller than the height difference of the first descending portion.

[0008] In one embodiment, the return air port is coaxially arranged with the inner ring plate, and the diameter of the return air port is not less than half of the diameter of the inner ring plate.

[0009] In one embodiment, the cover includes an edge segment, an inner connecting column and a center segment connected in sequence, the edge segment is located on the periphery of the center segment, and the edge segment and the center segment are respectively connected to the two ends of the inner connecting column to separate and form the second return air channel.

[0010] In one embodiment, the edge segment includes a second rising portion and a second descending portion that are connected and smoothly transitioned, the second rising portion is inclined at an upward slope toward the center segment, the second descending portion is inclined at a downward slope toward the center segment, and the height difference of the second rising portion is smaller than the height difference of the second descending portion.

[0011] In one embodiment, the central section includes a warped edge section and a flat section connected to each other, the warped edge section is located at the periphery of the flat section and the warped edge section is inclined at a downward slope toward the flat section.

[0012] In one embodiment, the warped edge section and the second descending portion are respectively connected to two ends of the inner connecting column and are parallel to each other.

[0013] A fan assembly comprises an impeller and a fan baffle as described in any of the above embodiments, wherein the impeller comprises a plurality of blades, which are rotatably arranged relative to the fan baffle and are located on a side of the ventilation plate away from the cover.

[0014] A cooking device comprises the fan assembly described above.

[0015] The fan baffle provided in the above scheme provides two return air channels by setting a first return air channel and a second return air channel both connected to the return air port, thereby realizing a dual-flow channel structure, thereby increasing the air intake area of ​​the fan assembly, enhancing the air flow stability and convergence, further increasing the circulating air volume in the cooking equipment, increasing the air volume of the fan blades, and shortening the cooking time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the exploded structure of a fan assembly in one embodiment of the present application.

[0017] Figure 2 for Figure 1 Schematic diagram of the structure of the fan baffle.

[0018] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of the medium-pressure blower baffle.

[0019] Figure 4 for Figure 3 Schematic diagram of a partial cross section of the fan baffle.

[0020] Description of reference numerals:

[0021] 10. Fan assembly; 100. Fan baffle; 110. Ventilation plate; 111. Return air outlet; 112. Outer ring plate; 113. Transition section; 1131. First lifting portion; 1132. First descending portion; 114. Inner ring plate; 120. Cover; 121. Edge section; 1211. Second lifting portion; 1212. Second descending portion; 122. Inner connecting column; 123. Center section; 1231. Warped edge section; 1232. Flat section; 130. First return air duct; 140. Second return air duct; 150. Outer connecting column; 160. Air outlet; 200. Impeller; 210. Trailing edge cover; 220. Fan blade. DETAILED DESCRIPTION

[0022] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0023] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0024] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0025] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0026] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0027] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0028] In one embodiment of the present application, a cooking device is provided, comprising a fan assembly 10 according to any of the following embodiments, an inner container, and a hot air system located outside the inner container. The inner container is provided with a cooking cavity, and the hot air system is provided with a warm air cavity. The fan assembly 10 is installed between the hot air system and the inner container and is used to exchange gas between the cooking cavity and the warm air cavity, thereby forming a warm air circulation between the cooking cavity and the warm air cavity. Alternatively, the cooking device may be a steamer, a steam oven, or other cooking device.

[0029] See Figure 1 , Figure 1A schematic cross-sectional view of a fan assembly 10 in one embodiment of the present application is shown. This embodiment provides a fan assembly 10 comprising a fan baffle 100 and an impeller 200 as described in some of the following embodiments. In this embodiment, the fan assembly 10 is a hot air blower and further includes a heater (not shown) located on the side of the impeller 200 facing away from the fan baffle 100. The heater is configured to heat the airflow to form hot air. In this embodiment, an electric heating tube is used for heating.

[0030] like Figures 1 to 3 As shown, an embodiment of the present application provides a fan baffle 100, which includes a ventilation plate 110 and a cover 120. Figure 1 As shown, the impeller 200 includes a trailing edge cover plate 210 and a plurality of blades 220 arranged on the surface of the trailing edge cover plate 210. The blades 220 are located on the outer edge of the end surface of the trailing edge cover plate 210 facing the fan baffle 100 and are distributed at intervals along the circumference of the trailing edge cover plate 210. The blades 220 can be rotatably arranged relative to the fan baffle 100 and are located on the side of the outer ring plate 112 facing the inner ring plate 114.

[0031] like Figure 1 and Figure 2 As shown, the ventilation plate 110 is provided with a return air port 111 that passes through the ventilation plate 110, which is used for the air flow to return to the side where the impeller 200 is located after circulation, and the gas in the cooking cavity of the inner pot in the cooking device flows to the warm air cavity of the hot air system. Figure 1 As shown, the return air outlet 111 is arranged at the center position of the ventilation plate 110. Preferably, the axis of the return air outlet 111 coincides with the rotation center of the impeller 200. During the operation of the impeller 200, the air flow pressure at the position of the return air outlet 111 is low, so that the air flow on the other side of the fan baffle 100 can flow to the side where the impeller 200 is located.

[0032] The cover 120 is connected to the ventilation plate 110 and is positioned opposite the return air inlet 111. In some embodiments, the cover 120 is positioned opposite and covers the return air inlet 111. The cover 120 covering the return air inlet 111 means that the cover 120 can block the return air inlet 111 when viewing the fan baffle 100 from the side where the cover 120 is provided, or that the cover 120 can completely fill the return air inlet 111 when viewing the fan baffle 100 from the side facing away from the cover 120. Preferably, the diameter of the cover 120 is not less than the diameter of the inner ring plate 114, so that the cover 120 can block the inner ring plate 114.

[0033] like Figure 4As shown, a gap exists between the cover 120 and the ventilation plate 110 in the thickness direction of the ventilation plate 110 to form a first return air channel 130 communicating with the return air port 111 , so that the return air enters the return air port 111 through the first return air channel 130 .

[0034] In one embodiment, the fan baffle 100 further includes an external connecting post 150, which is arranged axially along the return air port 111. The ends of the external connecting post 150 are connected to the ventilation plate 110 and the cover 120, respectively. Exemplarily, the external connecting post 150 is a stud to enhance the connection strength between the ventilation plate 110 and the cover 120. In this embodiment, the external connecting post 150 is mounted on the inner ring plate 114 to simplify installation.

[0035] See Figure 4 The cover 120 is provided with a second return air channel 140 which is separated from the first return air channel 130 and connected to the return air port 111, so as to provide two return air channels through the first return air channel 130 and the second return air channel 140 which are both connected to the return air port 111, thereby realizing a dual-flow channel structure, thereby increasing the air intake area, enhancing the air flow stability and convergence, further increasing the circulating air volume in the cooking equipment, increasing the air volume of the impeller 200, and shortening the cooking time.

[0036] like Figures 1 to 3 As shown, in one embodiment, the ventilation plate 110 includes an outer ring plate 112, a transition section 113, and an inner ring plate 114, which are connected in sequence. The return air port 111 is provided in the inner ring plate 114. In one embodiment, the return air port 111 and the inner ring plate 114 are coaxially arranged. That is, in this embodiment, there is only one return air port 111, which is located at the center of the ventilation plate 110. The diameter of the return air port 111 is not less than half the diameter of the inner ring plate 114. Exemplarily, the diameter of the return air port 111 ranges from 30 mm to 70 mm. Preferably, the diameter of the return air port 111 is not less than 0.8 times the diameter of the inner ring plate 114.

[0037] like Figure 1 and Figure 2 As shown, the outer ring plate 112 is provided with an air outlet 160 along the thickness direction of the fan baffle 100, which is used for the air flow to flow from one side where the impeller 200 is located to the other side, and the air flow in the warm air cavity of the hot air system in the cooking device flows into the cooking cavity of the inner pot. Figure 3 As shown, the air outlet 160 is arranged at the corner of the outer ring plate 112. During the operation of the impeller 200, the air flow flows radially toward the periphery along the fan blade 220 and accelerates, so that the air flow pressure at the location of the air outlet 160 is high, thereby improving the gas flow efficiency.

[0038] like Figure 3 and Figure 4As shown, the outer ring plate 112 and the inner ring plate 114 have a height difference in the thickness direction of the ventilation plate 110. That is, the inner ring plate 114 where the return air outlet 111 is located adopts a concave structure to guide the hot air return through the inclined transition section 113, reducing the return air resistance and directing the hot air return airflow to the negative pressure zone in the center of the fan blade 220, thereby enhancing the stability of the hot air flow. The plane where the outer ring plate 112 is located is separated from the plane where the inner ring plate 114 where the return air outlet 111 is located. In terms of space, the plane where the return air outlet 111 is located is lower than the plane where the outer ring plate 112 is located. The traditional front return air is optimized into a sunken annular return air, solving the problem of reverse overflow of the edge airflow of the return air outlet 111. This reduces the mutual influence between the return air and the outlet air in the hot air system of the cooking equipment and enhances the stability of the hot air system.

[0039] In the axial direction of the return air outlet 111, the outer ring plate 112 is closer to the inner ring plate 114 than the cover 120, that is, Figure 3 and Figure 4 As shown, the cover 120 is higher than the outer ring plate 112. On the one hand, the width of the first return air channel 130 is sufficient for the hot air to pass through, thereby avoiding turbulence and turbulence in the first return air channel 130 due to the narrowness of the first return air channel 130. On the other hand, it avoids the airflow guided by the transition section 113 from flowing to the surface of the cover 120 instead of entering the first return air channel 130, resulting in low hot air circulation efficiency.

[0040] like Figure 1 and Figure 2 As shown, in one embodiment, the inner ring plate 114 is a circular structure and the transition section 113 is an annular structure arranged around the outer periphery of the inner ring plate 114. This allows the hot return air to evenly enter the return air port 111 through the guiding effect of the transition section 113, thereby improving the stability and uniformity of the hot air flow. The transition section 113 guides the hot return air, reducing the return air resistance and directing the hot return air flow toward the return air port 111 located in the negative pressure zone at the center core of the fan blade 220, thereby enhancing the stability of the hot air flow.

[0041] like Figure 4As shown, in one embodiment, the transition section 113 includes a first lifting portion 1131 and a first descending portion 1132 that are connected and smoothly transitioned. The first lifting portion 1131 is inclined with an upward slope toward the inner ring plate 114, and the first descending portion 1132 is inclined with a downward slope toward the inner ring plate 114. The arc surface of the transition section 113 formed by the first lifting portion 1131 and the first descending portion 1132 guides the airflow, first lifting and then descending, to avoid the airflow entering the first return air channel 130 from directly entering and causing airflow turbulence, and to beautify the appearance of the fan baffle 100. It can be understood that "inclined with an upward slope" and "inclined with a downward slope" are only used as descriptions of the inclination direction, and do not limit the specific structure of the first lifting portion 1131 and the first descending portion 1132. The two can be inclined plates with a constant slope, or they can be as follows. Figure 1 and Figure 2 The arc structure shown.

[0042] like Figure 3 and Figure 4 As shown, the height difference of the first raised portion 1131 is smaller than the height difference of the first descending portion 1132, so that the outer ring plate 112 and the inner ring plate 114 have a height difference in the thickness direction of the fan baffle 100. In one embodiment, the height difference of the first raised portion 1131 is H1, and the height difference of the first descending portion 1132 is H2, with H2 ranging from 3H1 to 5H1. For example, H1 ranges from 2 mm to 8 mm.

[0043] like Figures 2 to 4 , as shown, in one embodiment, the cover 120 includes an edge segment 121, an inner connecting column 122 and a center segment 123 connected in sequence, the edge segment 121 is located at the periphery of the center segment 123, and the edge segment 121 and the center segment 123 are respectively connected to the two ends of the inner connecting column 122 so that the edge segment 121 and the center segment 123 are separated and a second return air channel 140 is formed therebetween.

[0044] like Figure 4 As shown, in one embodiment, the edge section 121 includes a second raised portion 1211 and a second descending portion 1212 that are connected and smoothly transitioned. The second raised portion 1211 is inclined with an upward slope toward the center section 123, and the second descending portion 1212 is inclined with a downward slope toward the center section 123. The height difference of the second raised portion 1211 is smaller than the height difference of the second descending portion 1212. The curved surface of the transition section 113 formed by the second raised portion 1211 and the second descending portion 1212 guides the airflow, first rising and then descending, thereby preventing the airflow entering the second return air duct 140 from directly entering and causing airflow turbulence, and beautifying the appearance of the fan baffle 100.

[0045] like Figure 3 and Figure 4 As shown, in one embodiment, the central section 123 includes a connected warped section 1231 and a flat section 1232, the warped section 1231 is located at the periphery of the flat section 1232 and the warped section 1231 is inclined at a downward slope toward the flat section 1232 to jointly define the second return air channel 140 with the second downward portion 1212, and the warped section 1231 and the second downward portion 1212 are used to guide the return air in the second return air channel 140.

[0046] like Figure 4 As shown, in one embodiment, the warped edge section 1231 and the second downward portion 1212 are respectively connected to the two ends of the inner connecting column 122 and are parallel to each other, so that the channel width of the second return air channel 140 is uniform, so that the return air flow in the second return air channel 140 is smooth.

[0047] The fan baffle 100 provided in the above scheme provides two return air channels by setting a first return air channel 130 and a second return air channel 140 both connected to the return air port 111, thereby realizing a dual-flow channel structure to increase the air intake area of ​​the fan assembly 10, enhance the air flow stability and convergence, further increase the circulating air volume in the cooking equipment, increase the air volume of the fan blades 220, and shorten the cooking time.

[0048] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A fan baffle, characterized in that: The fan baffle comprises: The ventilation plate is provided with a return air port; A cover is connected to the ventilation plate, and the cover is located opposite to the return air outlet. There is a gap between the cover and the ventilation plate in the thickness direction of the ventilation plate to form a first return air channel connected to the return air outlet. The cover is provided with a second return air channel separated from the first return air channel and connected to the return air outlet.

2. The fan baffle according to claim 1, characterized in that: The ventilation plate includes an outer ring plate, a transition section and an inner ring plate connected in sequence, the return air port is opened on the inner ring plate, and the outer ring plate and the inner ring plate have a height difference in the thickness direction of the ventilation plate.

3. The fan baffle according to claim 2, characterized in that: The transition section includes a first lifting portion and a first descending portion that are connected and smoothly transitioned, the first lifting portion is inclined toward the inner ring plate with an upward slope, the first descending portion is inclined toward the inner ring plate with a downward slope, and the height difference of the first lifting portion is smaller than the height difference of the first descending portion.

4. The fan baffle according to claim 2, characterized in that: The return air port is coaxially arranged with the inner ring plate, and the diameter of the return air port is not less than half of the diameter of the inner ring plate.

5. The fan baffle according to claim 1, characterized in that: The cover includes an edge segment, an inner connecting column and a center segment connected in sequence, the edge segment is located at the periphery of the center segment, and the edge segment and the center segment are respectively connected to the two ends of the inner connecting column to separate and form the second return air channel.

6. The fan baffle according to claim 5, characterized in that: The edge section includes a second rising portion and a second descending portion that are connected and smoothly transitioned, the second rising portion is inclined toward the center section with an upward slope, the second descending portion is inclined toward the center section with a downward slope, and the height difference of the second rising portion is smaller than the height difference of the second descending portion.

7. The fan baffle according to claim 6, characterized in that: The central section includes a warped edge section and a flat section connected to each other. The warped edge section is located at the periphery of the flat section and is inclined at a downward slope toward the flat section.

8. The fan baffle according to claim 7, characterized in that: The warped edge section and the second descending portion are respectively connected to two ends of the inner connecting column and are parallel to each other.

9. A fan assembly, characterized in that: It comprises an impeller and a fan baffle as claimed in any one of claims 1 to 8, wherein the impeller comprises a plurality of blades, and the blades are rotatably arranged relative to the fan baffle and are located on a side of the ventilation plate away from the cover.

10. A cooking device, characterized in that: The invention comprises the fan assembly described in claim 9.

Images