Centrifugal fan

Abstract

The centrifugal fan comprises a bottom plate, a plurality of air guide blades and an air wheel plate which are integrally formed, the air guide blades are annularly arranged and connected between the bottom plate and the air wheel plate, an air passing cavity is formed between the bottom plate and the air wheel plate, and an air outlet is formed between every two adjacent air guide blades; and the air guide blades are perpendicular to the bottom plate and / or the wind wheel plate. Compared with the prior art, the centrifugal wind wheel has the advantages that the centrifugal wind wheel is arranged to be of an integrally-formed structure, installation procedures are reduced, meanwhile, the strength of the wind guiding blades is enhanced through the supporting structure, and large air volume can be guided; and the angles of the air guide blades and the angles of the air outlets are reasonably arranged to form balance, so that the balance of the air guide amount and the air outlet amount is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of cooking equipment parts, in particular to a centrifugal fan. Background Art

[0002] A centrifugal fan is a fan that takes in air from the bottom and exhausts air from the surface. To meet the development of high-performance enclosures, high-performance centrifugal fans have also begun to be used in the cooling design of indoor product enclosure systems. Centrifugal fans can bring more cooling benefits due to their characteristics that the air inlet and outlet are not in a straight line and have high pressure and high air volume, thereby improving system performance.

[0003] The centrifugal fan in the prior art is usually formed by assembly, and one end of the blade extends from the center of the fan, which makes the air outlet efficiency low. In addition, the curved blade makes the air outlet direction also move circumferentially, which cannot meet the demand for wind direction in cooking equipment. Utility Model Content

[0004] In order to solve the above problems existing in the prior art, the utility model provides a centrifugal fan.

[0005] The above-mentioned problem of the utility model is solved by the following technical solutions:

[0006] A centrifugal fan comprises an integrally formed bottom plate, a plurality of air guide blades and a wind wheel plate, wherein the air guide blades are arranged in a ring shape and connected between the bottom plate and the wind wheel plate, an air passage cavity is formed between the bottom plate and the wind wheel plate, and an air outlet is formed between adjacent air guide blades;

[0007] The wind guide blades are perpendicular to the base plate and / or the wind wheel plate.

[0008] The above technical solution is further configured as follows: the wind wheel plate is an annular plate and at least covers the projection of the wind guide blades on the end surface of the wind wheel plate.

[0009] The above technical solution is further configured as follows: the projection of the wind guide blade on the bottom plate is a straight line having a first end and a second end;

[0010] The distance between the first end and the center of the bottom plate is greater than the distance between the second end and the center of the bottom plate.

[0011] The above technical solution is further configured as follows: the first end and the second end of the wind guide blade are respectively connected to the center of the bottom plate to form a wind guide angle α, and α=15°.

[0012] The above technical solution is further configured as follows: the outer periphery of the bottom plate is formed by a plurality of first bevels and second bevels connected at intervals; and the first bevel is connected to the first end of the wind guide blade;

[0013] The first oblique edge and the radial direction of the bottom plate form an angle β, and β=75°.

[0014] The above technical solution is further configured as follows: a support portion is provided at a junction of the first beveled edge and the air guide blade facing the air passage cavity; the support portion is a support shell with a recessed outer side.

[0015] The above technical solution is further configured as follows: the cross section of the supporting portion is triangular, and two adjacent sides are respectively located on the air guide blade and the bottom plate.

[0016] The above technical solution is further configured as follows: the first hypotenuse and the second hypotenuse are vertically arranged on a side close to the center of the circle.

[0017] The above technical solution is further configured as follows: the first hypotenuse and the second hypotenuse are provided with an arc-shaped edge at the outer end for connection, and a plurality of arc-shaped edges can be completed to form a circle.

[0018] The above technical solution is further configured as follows: wind shielding ribs are provided on the bottom plate protruding toward the air passage cavity.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. The centrifugal wind wheel is set into an integrated structure to reduce the installation process. At the same time, the strength of the wind guide blade is enhanced through the supporting structure, which can guide large air volumes;

[0021] 2. Reasonably set the angle of the air guide blade and the angle of the air outlet to achieve a balance between the air guide volume and the air outlet volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the utility model.

[0023] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model.

[0024] The attached drawings are marked as follows: 321, bottom plate; a, first bevel; b, second bevel; c, curved edge; 321.1, windproof rib;

[0025] 322, air guide vane; 322.1, first end; 322.2, second end; 324, supporting part; 325, air outlet;

[0026] 323. Wind wheel plate. DETAILED DESCRIPTION

[0027] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0028] like Figure 1 and 2 As shown, the following embodiment discloses a centrifugal fan, including an integrally formed bottom plate 321, a plurality of guide blades 322 and a wind wheel plate 323, wherein the guide blades 322 are arranged in a ring shape and connected between the bottom plate 321 and the wind wheel plate 323, an air cavity is formed between the bottom plate 321 and the wind wheel plate 323, and an air outlet 325 is formed between adjacent guide blades 322;

[0029] The wind guide blades are perpendicular to the bottom plate 321 and / or the wind wheel plate 323 .

[0030] The above is the basic solution of this embodiment.

[0031] Specific reference Figure 1 As shown, in this embodiment, the base plate 321 is an approximately circular panel with a drive hole for connecting to the motor in the center; the guide blades 322 are vertically arranged on the base plate 321, and, in this embodiment, the wind wheel plate 323 is also vertically arranged with the guide blades 322, that is, the wind wheel plate 323 and the base plate 321 are arranged in parallel.

[0032] The two ends of the wind guide blade 322 are connected to the bottom plate 321 and the wind wheel plate 323 respectively, but not to the center of the bottom plate 321, thereby increasing the air inlet space in the middle of the centrifugal wind wheel and improving the wind guiding efficiency.

[0033] To ensure the connection between the wind guide blades and the wind wheel plate 323 , in this embodiment, the wind wheel plate 323 is an annular plate and at least covers the projection of the wind guide blades 322 on the end surface of the wind wheel plate 323 .

[0034] If the guide blade 322 is exposed to the outside of the wind wheel plate 323, when the excess air volume is large, the end surface of the guide blade 322 will be subjected to a large impact, which may cause the guide blade 322 to bend; in this embodiment, the two ends of the guide blade 322 are completely connected to the bottom plate 321 and the wind wheel plate 323 to ensure that the guide blade 322 has sufficient support to withstand a large excess air volume.

[0035] In this embodiment, the projection of the air guide blade 322 on the bottom plate 321 is a straight line, having a first end 322.1 and a second end 322.2;

[0036] The distance between the first end 322 . 1 and the center of the bottom plate 321 is greater than the distance between the second end 322 . 2 and the center of the bottom plate 321 .

[0037] Specific reference Figure 2 As shown, in this embodiment, the guide blade 322 is a straight surface. Therefore, when the hot air flow is blown out from the air outlet along the guide blade 322, it is blown out along a straight line. That is to say, if the air inlet of the cooking equipment is set on the air outlet path of the hot air flow, almost all of the hot air flow blown out from the centrifugal fan can enter the air inlet, thereby greatly increasing the utilization rate of the hot air flow.

[0038] Preferably, in this embodiment, to ensure maximum air outlet efficiency, the first end 322.1 and the second end 322.2 of the air guide blade 322 are respectively connected to the center of the bottom plate 321 to form an air guide angle α, and α=15°.

[0039] In addition, in this embodiment, the number of blades 322 is preferably 12. That is to say, in this configuration, the wind guide angle is equal to the angle of the air outlet 325, and the occupied angle of the wind guide blade 322 is balanced with the occupied angle of the air outlet 325, thereby ensuring the maximization of the air output.

[0040] In this embodiment, the bottom plate 321 and the air guide vane 322 are specifically configured as follows: the outer periphery of the bottom plate 321 is formed by a plurality of first oblique edges a and second oblique edges b being connected at intervals; and the first oblique edge a is connected to the first end 322.1 of the air guide vane 322;

[0041] The first hypotenuse a and the radial direction of the bottom plate 321 form an angle β, and β=75°.

[0042] Specific reference Figure 2 As shown, the first oblique side a is the oblique side connected to the air guide blade, and the second oblique side b is the oblique side adjacent to the air guide blade 322;

[0043] The first hypotenuse a and the radial direction of the bottom plate 321 form an angle of 75 degrees, that is, the air guide blade 322 and the radial direction of the bottom plate 321 also form an angle of 75 degrees.

[0044] When the hot air flow is blown out under the action of the centrifugal wind wheel, it moves radially outward inside the centrifugal wind wheel due to the centrifugal action, and when the position of the straight guide vane 322 is moved, since the guide vane 322 is inclined relative to the diameter of the centrifugal wind wheel, the moving direction of the guide vane 322 is changed at the position of the guide vane 322, so that it is blown out in a straight line direction along the end face of the guide vane 322.

[0045] In addition, in this embodiment, the first hypotenuse a and the second hypotenuse b are vertically arranged on the side close to the center of the circle.

[0046] Furthermore, the first hypotenuse a and the second hypotenuse b are connected with an arcuate edge c at the outer ends, and a plurality of arcuate edges c can be completed to form a circle.

[0047] The connecting part is arranged in an arc shape, so as to have a circular appearance of the centrifugal wind wheel itself, and at the same time, the material setting is reduced, the weight of the centrifugal wind wheel itself is reduced, and the load of the motor is reduced.

[0048] In order to enhance the supporting strength of the air guide blade, in this embodiment, a supporting portion 324 is provided at the junction of the first bevel a and the air guide blade 322 toward the air passage cavity; the supporting portion 324 is a supporting shell with a recessed outer side.

[0049] One side is set as a concave portion so that the inner bulge forms a support, which does not increase the overall weight of the centrifugal wind wheel, but enhances the strength of the guide blade 322, so that the guide blade 322 can guide a large amount of air.

[0050] Preferably, in this embodiment, the cross-section of the supporting portion 324 is triangular, and two adjacent sides are respectively located on the air guide blade and the bottom plate 321 .

[0051] The two end surfaces of the supporting portion 324 are respectively connected to the wind guide blade and the bottom plate 321 . Compared with the wind wheel plate 323 , the bottom plate 321 has a stronger supporting force.

[0052] In this embodiment, a wind shielding rib 321.1 is provided on the bottom plate 321 and protrudes toward the air passage cavity.

[0053] When the airflow enters the centrifugal wind wheel, it causes a great impact on the bottom plate 321. The wind shielding ribs 321.1 are provided to decelerate part of the airflow and at the same time increase the strength of the bottom plate 321 to avoid bending of the bottom plate 321 caused by impact.

[0054] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A centrifugal fan, characterized in that: The invention comprises an integrally formed bottom plate (321), a plurality of wind guide blades (322) and a wind wheel plate (323); the wind guide blades (322) are arranged in a ring shape and connected between the bottom plate (321) and the wind wheel plate (323); an air cavity is formed between the bottom plate (321) and the wind wheel plate (323); and an air outlet (325) is formed between adjacent wind guide blades (322); The wind guide blade (322) is perpendicular to the bottom plate (321) and / or the wind wheel plate (323); The projection of the air guide blade (322) on the bottom plate (321) is a straight line having a first end (322.1) and a second end (322.2); The distance between the first end (322.1) and the center of the bottom plate (321) is greater than the distance between the second end (322.2) and the center of the bottom plate (321).

2. The centrifugal fan according to claim 1, characterized in that: The wind wheel plate (323) is an annular plate and at least covers the projection of the wind guide blade (322) on the end surface of the wind wheel plate (323).

3. The centrifugal fan according to claim 1, characterized in that: The first end (322.1) and the second end (322.2) of the air guide blade (322) are respectively connected to the center of the bottom plate (321) to form an air guide angle α, and α=15°.

4. The centrifugal fan according to claim 1, characterized in that: The outer periphery of the bottom plate (321) is formed by a plurality of first oblique edges (a) and second oblique edges (b) being connected at intervals; and the first oblique edge (a) is connected to the first end (322.1) of the air guide blade (322); The first oblique edge (a) and the radial direction of the bottom plate (321) form an angle β, and β=75°.

5. The centrifugal fan according to claim 4, characterized in that: A support portion (324) is provided at the junction of the first oblique edge (a) and the air guide blade (322) facing the air passage cavity; the support portion (324) is a support shell with a recessed outer side.

6. The centrifugal fan according to claim 5, characterized in that: The cross section of the support portion (324) is triangular, and two adjacent sides are respectively located on the air guide blade (322) and the bottom plate (321).

7. The centrifugal fan according to claim 4, characterized in that: The first hypotenuse (a) and the second hypotenuse (b) are vertically arranged on a side close to the center of the circle.

8. The centrifugal fan according to claim 4, characterized in that: The first oblique side (a) and the second oblique side (b) are connected by an arcuate side (c) at the outer ends, and a plurality of arcuate sides (c) can be complemented to form a circle.

9. The centrifugal fan according to claim 1, characterized in that: The bottom plate (321) is provided with wind shielding ribs (321.1) protruding toward the air passage cavity.

Images