Impeller blade, centrifugal fan and integrated cooker

Abstract

The utility model provides an impeller blade, a centrifugal fan and an integrated cooker, the impeller blade comprises a plate-shaped body, and the cross section of the body is arc-shaped; the two opposite side edges of the body are the air inlet side and the air outlet side respectively, the end face of the air inlet side is a plane, and the end face of the air outlet side is in a sawtooth shape. The air inlet side comprises a first inclined face, a vertical face and a second inclined face which are sequentially connected from top to bottom, and the ends, away from the vertical face, of the first inclined face and the second inclined face obliquely extend in the direction of the air outlet side. The height of the first inclined face in the vertical direction is H1, the height of the second inclined face in the vertical direction is H2, and H1 is larger than or equal to H2. According to the utility model, the flowing path of airflow can be changed, the suction and exhaust of oil smoke are promoted, the vortex effect of the airflow can be optimized, and the flowing speed of air and the oil smoke trapping capability are enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen appliances, and in particular to an impeller blade, a centrifugal fan and an integrated stove comprising the centrifugal fan. Background Art

[0002] Integrated stove is a kitchen appliance that integrates multiple functions such as range hood, gas stove, steam oven, disinfection cabinet, etc. It has the advantages of saving space and good fume extraction effect. The centrifugal fan impeller blades used in existing integrated stoves are mostly designed with flat or curved blades. Although they can achieve fume extraction and exhaust under some conditions, they have certain limitations. The flow efficiency and fume collection effect of the impeller blades of existing centrifugal fans are often affected by the design shape and airflow direction. Therefore, optimizing the impeller blade structure is an important way to improve the performance of integrated stoves and reduce noise. Utility Model Content

[0003] The utility model aims to provide an impeller blade, which can change the flow path of the airflow, promote the suction and discharge of oil smoke, and can also optimize the vortex effect of the airflow, thereby enhancing the flow speed of the air and the oil smoke capturing ability.

[0004] Another object of the utility model is to provide a centrifugal fan, which includes the above-mentioned impeller blades, which can change the flow path of the airflow, promote the suction and exhaust of oil smoke, and can also optimize the vortex effect of the airflow, enhance the air flow speed and oil smoke capture capacity.

[0005] Another object of the present utility model is to provide an integrated stove, which includes the above-mentioned centrifugal fan, which can change the flow path of the airflow, promote the suction and exhaust of oil smoke, and can also optimize the vortex effect of the airflow, enhance the air flow speed and oil smoke capture capacity.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An impeller blade comprises a plate-shaped body, the cross section of the body is arc-shaped; two opposite sides of the body are respectively an air inlet side and an air outlet side, the end face of the air inlet side is a plane, and the end face of the air outlet side is a serrated shape; the air inlet side comprises a first inclined surface, a vertical surface and a second inclined surface connected in sequence from top to bottom, and the first inclined surface and the second inclined surface extend obliquely toward the air outlet side at one end away from the vertical surface; the height of the first inclined surface in the vertical direction is H1, the height of the second inclined surface in the vertical direction is H2, and H1≥H2.

[0008] According to an embodiment of the present invention, the angle between the first inclined plane and the vertical plane, and the angle between the second inclined plane and the vertical plane are both α, and 5°≤α≤10°.

[0009] According to one embodiment of the present invention, the height of the air inlet side in the vertical direction is H, and H≤2*(H1+H2).

[0010] According to one embodiment of the present invention, the angle of the arc corresponding to the cross section of the body is θ, and 90°≤θ≤100°.

[0011] According to one embodiment of the utility model, the end face of the air outlet side has crests and troughs connected in sequence; the distance between adjacent crests and adjacent troughs is L1, the distance between the top of the crest and the bottom of the trough is W1, and L1>W1.

[0012] According to an embodiment of the utility model, a smooth section is provided in the middle of the air outlet side, the smooth section is flush with the top of the wave crest, the length of the smooth section is L2, and L2>L1>W1.

[0013] According to one embodiment of the present utility model, the angle corresponding to the opening of the wave crest or the wave trough is β, and 55°≤β≤65°.

[0014] According to one embodiment of the utility model, connecting ear plates are provided on the top and the bottom of the body.

[0015] The utility model also provides a centrifugal fan, including a hub and a wheel disc arranged on the inner side of the hub, and also includes the above-mentioned impeller blades, the impeller blades are arranged between the mounting plates on the outer periphery of the hub, the air inlet side is close to the wheel disc, and the air outlet side is far away from the wheel disc.

[0016] The utility model also provides an integrated stove, comprising the centrifugal fan.

[0017] Compared with the prior art, the advantages and beneficial effects of the embodiments of the present invention are:

[0018] The impeller blades, centrifugal fans and integrated stoves provided by the embodiments of the utility model can change the flow path of the airflow through the sawtooth structure on the air outlet side of the impeller blades when the centrifuge is running, thereby promoting the suction and discharge of oil smoke. In addition, a multi-angle tilt design is adopted on the air inlet side (the first inclined surface and the second inclined surface are respectively set at an angle with the vertical surface, H1≥H2), which can optimize the vortex effect of the airflow and enhance the air flow speed and oil smoke capture capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. Among them:

[0020] Figure 1 A schematic diagram of the structure of the impeller blades provided in the embodiment of the utility model;

[0021] Figure 2 A top view of an impeller blade provided in an embodiment of the utility model;

[0022] Figure 3 A side view of the wind inlet side of the impeller blade provided in an embodiment of the utility model;

[0023] Figure 4 A side view of the wind outlet side of the impeller blade provided in an embodiment of the utility model;

[0024] Figure 5 A schematic structural diagram of a centrifugal fan provided in an embodiment of the utility model.

[0025] Description of reference numerals:

[0026] 1. Main body; 11. Air inlet side; 111. First inclined surface; 112. Second inclined surface; 113. Vertical surface; 12. Air outlet side; 121. Wave crest; 122. Wave trough; 123. Smooth section; 13. Connecting ear plate; 2. Hub; 21. Mounting plate; 3. Wheel disc. DETAILED DESCRIPTION

[0027] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present invention and does not limit the present invention. In fact, it will be clear to those skilled in the art that modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature shown or described as a part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desired that the present invention includes such modifications and variations within the scope of the appended claims and their equivalents.

[0028] In the description of the present invention, "first", "second" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprising" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, but do not exclude other elements or objects. The directions or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. The terms "connected", "connected" and "set" used in the present invention should be understood in a broad sense, for example, they can be fixedly connected or detachably connected; they can be directly connected or indirectly connected through an intermediate component; they can be wired electrical connections, radio connections, or wireless communication signal connections. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] like Figure 1 , Figure 2 , Figure 3 As shown, the embodiment of the utility model provides an impeller blade for an impeller of a centrifuge. The impeller blade comprises a plate-shaped body 1, and the cross section of the body 1 is in an arc shape. For the convenience of description, the definition Figure 1 The upper side is the upper side, and the lower side is the lower side. The two opposite sides of the main body 1 are the air inlet side 11 and the air outlet side 12, respectively. The end face of the air inlet side 11 is a plane, and the end face of the air outlet side 12 is a serrated shape. The air inlet side 11 includes a first inclined surface 111, a vertical surface 113, and a second inclined surface 112 connected in sequence from top to bottom. The first inclined surface 111 and the second inclined surface 112 extend obliquely toward the air outlet side 12 away from one end of the vertical surface 113, and the height of the first inclined surface 111 in the vertical direction is H1, and the height of the second inclined surface 112 in the vertical direction is H2, and H1≥H2. Since the first inclined surface corresponds to the main air inlet and the second inclined surface corresponds to the secondary air inlet, H1≥H2 can increase the air intake amount and thus increase the airflow speed.

[0030] The impeller blades provided in the embodiment of the utility model are installed in the circumferential direction of the impeller hub of the centrifuge, with the air inlet side 11 facing inward and the air outlet side 12 facing outward. When the centrifuge is running, the serrated structure of the air outlet side 12 of the impeller blades can change the flow path of the airflow and promote the suction and discharge of oil smoke. In addition, the multi-angle tilt design (the first inclined surface 111 and the second inclined surface 112 are respectively set at an angle with the vertical surface 113, and H1≥H2) on the air inlet side 11 can optimize the vortex effect of the airflow and enhance the air flow speed and oil smoke capture capacity.

[0031] like Figure 3 As shown, in a preferred embodiment of the present invention, the angle between the first inclined surface 111 and the vertical surface 113, and the angle between the second inclined surface 112 and the vertical surface 113 are both α, and 5°≤α≤10°, which can further optimize the vortex effect of the airflow and enhance the air flow speed and oil fume capture capacity. Further, the height of the air inlet side 11 in the vertical direction is H, and H≤2*(H1+H2).

[0032] like Figure 2 As shown, in one embodiment of the utility model, the angle of the arc corresponding to the cross section of the main body 1 is θ, and 90°≤θ≤100°. By adopting this angle range, the length of the arc can be increased, the flow path of the gas inside the main body 1 can be extended, the gas pressure can be increased, and the outlet speed of the airflow can be increased.

[0033] like Figure 4 As shown, in one embodiment of the utility model, the end face of the air outlet side 12 has crests 121 and troughs 122 connected in sequence to form a sawtooth shape. By staggered cutting of the crests 121 and the troughs 122, the flow path of the airflow can be changed, the vortex and turbulence in the exhaust airflow can be reduced, and the fan can be operated with reduced noise. The spacing between adjacent crests 121 and adjacent troughs 122 is L1, the spacing between the top of the crest 121 and the bottom of the trough 122 is W1, and L1>W1, which can reduce the noise during operation.

[0034] like Figure 4 As shown, in one embodiment of the utility model, the middle of the air outlet side 12 has a smooth section 123, the smooth section 123 is flush with the top of the wave crest 121, the length of the smooth section 123 is L2, and L2>L1>W1, which can further reduce the noise during operation.

[0035] like Figure 4 As shown, in one embodiment of the present invention, the angle corresponding to the opening of the wave crest 121 or the wave trough 122 is β, and 55°≤β≤65°, which can further reduce the noise during operation.

[0036] like Figure 1, Figure 2 , Figure 3 , Figure 4 As shown, in order to connect with the impeller hub of the centrifuge, the top and bottom of the body 1 are provided with connecting ear plates 13.

[0037] like Figure 5 As shown, the utility model also provides a centrifugal fan, including a hub 2 and a wheel disc 3 arranged inside the hub 2. The structure of the centrifugal fan is the prior art and will not be described in detail. The difference from the prior art is that the centrifugal fan also includes the above-mentioned impeller blades, which are arranged between the upper and lower mounting plates 21 on the outer periphery of the hub 2, the air inlet side 11 is close to the wheel disc 3, and the air outlet side 12 is far away from the wheel disc 3.

[0038] The utility model also provides an integrated stove, comprising the centrifugal fan.

[0039] The impeller blades, centrifugal fan and integrated stove provided by the utility model have the following advantages:

[0040] 1. Can improve airflow efficiency: The serrated shape of the impeller blades on the air outlet side can effectively change the path of the airflow, increase the suction force of the fan and the air flow speed;

[0041] 2. Can improve the oil fume capture effect: The unique structural design (the inclination angle and height of each slope on the air inlet side, the specific size and angle of the sawtooth structure on the air outlet side) can significantly improve the oil fume capture rate and improve the quality of the kitchen environment;

[0042] 3. It can make the fan run with reduced noise: by optimizing the airflow, it can reduce the noise during the fan operation, providing users with a more comfortable cooking experience, and has good market application prospects.

[0043] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An impeller blade, characterized in that: The invention comprises a plate-shaped body (1), wherein the cross section of the body (1) is in the shape of an arc; the two opposite sides of the body (1) are respectively an air inlet side (11) and an air outlet side (12); the end face of the air inlet side (11) is a plane, and the end face of the air outlet side (12) is a sawtooth; the air inlet side (11) comprises a first inclined surface (111), a vertical surface (113) and a second inclined surface (112) which are connected in sequence from top to bottom; the ends of the first inclined surface (111) and the second inclined surface (112) away from the vertical surface (113) extend obliquely in the direction of the air outlet side (12); the height of the first inclined surface (111) in the vertical direction is H1, the height of the second inclined surface (112) in the vertical direction is H2, and H1≥H2.

2. The impeller blade according to claim 1, characterized in that: The included angle between the first inclined surface (111) and the vertical surface (113), and the included angle between the second inclined surface (112) and the vertical surface (113) are both α, and 5°≤α≤10°.

3. The impeller blade according to claim 1, characterized in that: The height of the air inlet side (11) in the vertical direction is H, and H≤2*(H1+H2).

4. The impeller blade according to claim 1, characterized in that: The angle of the circular arc corresponding to the cross section of the body (1) is θ, and 90°≤θ≤100°.

5. The impeller blade according to any one of claims 1 to 4, characterized in that: The end surface of the air outlet side (12) has wave crests (121) and wave troughs (122) connected in sequence; the spacing between adjacent wave crests (121) and adjacent wave troughs (122) is L1, the spacing between the top of the wave crest (121) and the bottom of the wave trough (122) is W1, and L1>W1.

6. The impeller blade according to claim 5, characterized in that: The middle part of the air outlet side (12) has a smooth section (123), the smooth section (123) is flush with the top of the wave crest (121), the length of the smooth section (123) is L2, and L2>L1>W1.

7. The impeller blade according to claim 5, characterized in that: The angle corresponding to the opening of the wave crest (121) or the wave trough (122) is β, and 55°≤β≤65°.

8. The impeller blade according to any one of claims 1 to 4, characterized in that: The top and bottom of the body (1) are provided with connecting ear plates (13).

9. A centrifugal fan, comprising a hub (2) and a wheel disc (3) arranged inside the hub (2), characterized in that: It also comprises an impeller blade according to any one of claims 1 to 8, wherein the impeller blade is arranged between mounting plates (21) on the periphery of the hub (2), the air inlet side (11) is close to the wheel disc (3), and the air outlet side (12) is far from the wheel disc (3).

10. An integrated stove, characterized in that: Comprising the centrifugal fan according to claim 9.

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