Forward multi-wing centrifugal fan

Abstract

The utility model relates to a forward multi-wing centrifugal fan, which belongs to the technical field of forward multi-wing centrifugal fans and comprises a casing, an impeller and an axial magnetic field motor, the impeller is rotatably arranged in the casing, the axial magnetic field motor is positioned in the casing, and the impeller rotates under the action of the axial magnetic field motor. The forward multi-wing centrifugal fan has the advantages that the air inlet of the forward multi-wing centrifugal fan is expanded, so that the effect of increasing the air inlet amount of the forward multi-wing centrifugal fan is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of forward multi-wing centrifugal fan, especially to a forward multi-wing centrifugal fan. BACKGROUND

[0002] The forward multi-wing centrifugal fan is a kind of ventilation equipment using mechanical force principle, air is sucked and discharged by centrifugal force, its structure is compact, and the space occupied is smaller, especially suitable for narrow environment, at present, the forward multi-wing centrifugal fan is more and more widely used in refrigeration industry, especially applied to evaporator, the internal evaporator exchanges heat with air in atmosphere through flowing refrigerant, and the flow rate of air is directly proportional to the air volume of evaporator, the larger the air volume is, the higher the heat exchange efficiency is, and the better the refrigeration effect is.

[0003] Therefore, in order to improve the refrigeration effect of evaporator, the requirement of the forward multi-wing centrifugal fan applied to evaporator is higher, and the air intake of the forward multi-wing centrifugal fan needs to be effectively improved. UTILITY MODEL CONTENT

[0004] In order to improve the air intake of the forward multi-wing centrifugal fan, the utility model provides a kind of forward multi-wing centrifugal fan.

[0005] The utility model provides a kind of forward multi-wing centrifugal fan, adopt following technical scheme:

[0006] A kind of forward multi-wing centrifugal fan, including casing, impeller and axial magnetic field motor, the impeller rotation is arranged in casing, the axial magnetic field motor is located in casing interior, and the impeller rotates under the action of axial magnetic field motor, the casing is opened and has air inlet and air outlet.

[0007] By adopting the above technical scheme, axial magnetic field motor provides power for the rotation of impeller, when axial magnetic field motor starts, impeller can rotate under the drive of axial magnetic field motor;Most of the forward multi-wing centrifugal fan in prior art selects radial magnetic field motor as driving source, after modifying driving source to axial magnetic field motor, the axial dimension of driving source is effectively shortened, so as to increase the air inlet of forward multi-wing centrifugal fan, facilitate the air intake of the forward multi-wing centrifugal fan, effectively improve the air intake and performance of the forward multi-wing centrifugal fan under the condition of same rotating speed;Casing is used to collect and guide gas.

[0008] Preferably, the axial dimension of the axial magnetic field motor is 37-55mm.

[0009] By adopting the above technical scheme, specific size needs to be selected according to the power demand of forward multi-wing centrifugal fan, the smaller the power demand is, the smaller the axial dimension of axial magnetic field motor is, and the range of the forward multi-wing centrifugal fan is improved.

[0010] Preferably, the shell comprises a volute and side shells arranged on both sides of the volute, and the volute is arranged in a logarithmic spiral shape.

[0011] By adopting the above technical scheme, the volute can more effectively collect and guide the gas, ensuring effective transmission and discharge of the airflow. The special shape of the logarithmic spiral line can make the gas accelerate and expand more uniformly in the volute, which helps to reduce the turbulence and vortex of the airflow in the volute, thereby improving the overall efficiency of the centrifugal fan.

[0012] Preferably, the shell comprises two volutes for accommodating the impellers, and the volutes are in communication with the air inlet and the air outlet.

[0013] By adopting the above technical scheme, the two impellers can effectively improve the air intake of the forward multi-wing centrifugal fan while significantly improving the performance and service life of the forward multi-wing centrifugal fan.

[0014] Preferably, the shell comprises a reinforcing rib plate, the reinforcing rib plate comprises a connecting plate and two reinforcing plates, and the two reinforcing plates are symmetrically arranged on both sides of the axial magnetic field motor. The two ends of the reinforcing plate are attached to the end wall of the length direction of the air inlet, and the two reinforcing plates are connected by the connecting plate.

[0015] By adopting the above technical scheme, the length of the air inlet is stabilized by the reinforcing rib plate, thereby improving the strength of the shell to some extent and effectively ensuring the air intake and service life of the forward multi-wing centrifugal fan.

[0016] Preferably, the shell comprises a first shell and a second shell, and the first shell and the second shell are connected by bolts.

[0017] By adopting the above technical scheme, the forward multi-wing centrifugal fan is convenient to disassemble and maintain during actual use, thereby improving the service life of the forward multi-wing centrifugal fan to some extent.

[0018] In summary, the present application has the following at least one beneficial technical effect:

[0019] 1. The forward multi-wing centrifugal fan in the prior art mostly selects a radial magnetic field motor as a driving source. After modifying the driving source to an axial magnetic field motor, the axial dimension of the driving source is effectively shortened, thereby increasing the air inlet of the forward multi-wing centrifugal fan, facilitating the air intake of the forward multi-wing centrifugal fan, and effectively improving the air intake and performance of the forward multi-wing centrifugal fan under the same speed.

[0020] 2. By arranging the volute, the gas can be more effectively collected and guided, ensuring effective transmission and discharge of the airflow.BRIEF DESCRIPTION OF DRAWINGS BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a whole structure schematic diagram of the embodiment of the application.

[0022] Figure 2 is a structure schematic diagram of another perspective in the embodiment of the application.

[0023] Figure 3 is a side view in the embodiment of the application.

[0024] Figure 4 is a wind volume comparison diagram before and after improvement in the embodiment of the application.

[0025] BRIEF DESCRIPTION OF DRAWINGS: 1, a casing; 11, a side shell; 12, a volute; 13, a first shell; 14, a second shell; 15, a containing cavity; 2, an impeller; 3, an axial magnetic field motor; 4, an air inlet; 5, an air outlet; 6, a reinforcing rib plate; 61, a connecting plate; 62, a reinforcing plate. DETAILED DESCRIPTION

[0026] The following will be described in detail in combination with the accompanying Figures 1-3 The utility model will be described in further detail.

[0027] The embodiment of the application discloses a forward multi-wing centrifugal fan, referring to Figure 1 and Figure 2 , comprising a casing 1, an impeller 2 and an axial magnetic field motor 3, the axial magnetic field motor 3 is located inside the casing 1, the impeller 2 is rotationally arranged in the casing 1, and the impeller 2 rotates under the action of the axial magnetic field motor 3, the casing 1 is provided with an air inlet 4 and an air outlet 5.

[0028] The axial magnetic field motor 3 provides power for the rotation of the impeller 2, the output shaft of the axial magnetic field motor 3 is connected with the hub of the impeller 2 through a shaft sleeve, when the axial magnetic field motor 3 starts, the impeller 2 can rotate under the driving of the axial magnetic field motor 3, and this connection mode enables the impeller 2 to stably rotate in the casing 1, so that centrifugal force is generated, air is thrown out of the impeller 2 and gathered in the casing 1, and then discharged from the air outlet 5.

[0029] Referring to Figure 1 , Figure 2 and Figure 3, the casing 1 is used for collecting and guiding gas, the casing 1 comprises a volute plate 12 and side shells 11 arranged on both sides of the volute plate 12, the volute plate 12 is integrally formed with the side shells 11, the reliability of fixing the volute plate 12 and the side shells 11 is improved, through the arrangement of the volute plate 12, the gas can be more effectively collected and guided, the volute plate 12 is usually arranged in a logarithmic spiral line, and the special shape of the logarithmic spiral line can make the gas in the volute get more uniform acceleration and pressure expansion, and such a design helps to reduce the turbulence and vortex of the airflow in the volute, thereby improving the overall efficiency of the centrifugal fan.

[0030] With reference to Figure 1 And Figure 2 , the casing 1 is divided into a first shell 13 and a second shell 14, the first shell 13 and the second shell 14 are fastened by bolts, so that the forward multi-wing centrifugal fan is convenient to disassemble and maintain during actual use, and the service life of the forward multi-wing centrifugal fan is improved to a certain extent.

[0031] The forward multi-wing centrifugal fan in the prior art mostly selects a radial magnetic field motor as a driving source, after the driving source is modified to an axial magnetic field motor 3, the axial size of the driving source is effectively shortened, thereby increasing the air inlet 4 of the forward multi-wing centrifugal fan, which is beneficial to the air inlet of the forward multi-wing centrifugal fan, and under the condition of the same rotating speed, the performance of the forward multi-wing centrifugal fan is effectively improved.

[0032] The axial size of the axial magnetic field motor 3 is between 37mm and 56mm, and the specific size needs to be selected according to the power demand of the forward multi-wing centrifugal fan, and the smaller the power demand is, the smaller the axial size of the axial magnetic field motor 3 is.

[0033] With reference to Figure 4 In the figure, the X-axis indicates the air volume, the Y-axis indicates the pressure unit in inches, under the condition that the impellers 2 with the same diameter of 80mm and the same rotating speed, the radial magnetic field motor with an axial size of 106mm is compared with the axial magnetic field motor 3 with an axial size of 56mm, the red curve in the figure represents that the driving source of the forward multi-wing centrifugal fan is a radial magnetic field motor, and the purple curve represents that the driving source of the forward multi-wing centrifugal fan is an axial magnetic field motor, and experimental data show that when the pressure is 30Pa, the air volume of the forward multi-wing centrifugal fan with the radial magnetic field motor as the driving source is 240CMH, and the air volume of the forward multi-wing centrifugal fan with the axial magnetic field motor 3 as the driving source is 325CMH, the air volume is increased by ΔQ=(325-240) / 240=35%, and the effect of improving the performance of the forward multi-wing centrifugal fan is remarkable.

[0034] With reference to Figure 1 And Figure 2, the impeller 2 has two, two impellers 2 are symmetrically arranged on the two sides of the axial magnetic field motor 3, and correspondingly, the axial magnetic field motor 3 selected in the application has two output shafts, the casing 1 is provided with two accommodating cavities 15 for accommodating the impeller 2, and the accommodating cavities 15 are communicated with the air inlet 4 and the air outlet 5, so that the air inlet amount of the forward multi-wing centrifugal fan is effectively improved, and the performance and service life of the forward multi-wing centrifugal fan are significantly improved.

[0035] With reference to Figure 1 and Figure 2 The casing 1 comprises a reinforcing rib plate 6, the reinforcing rib plate 6 comprises an integral connecting plate 61 and two reinforcing plates 62, the two reinforcing plates 62 are symmetrically arranged on the two sides of the axial magnetic field motor 3, the two ends of the reinforcing plate 62 are attached to the lengthwise end wall of the air inlet 4, and the two reinforcing plates 62 are connected through the connecting plate 61. By arranging the reinforcing rib plate 6, the length of the air inlet 4 is stabilized, so that the strength of the casing 1 is improved to a certain extent, and the air inlet amount and service life of the forward multi-wing centrifugal fan are effectively guaranteed.

[0036] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so that: any equivalent changes made according to the structure, shape and principle of the application should be covered within the protection scope of the application.

Claims

1. A forward multi-wing centrifugal fan characterized by, The application relates to a fan, which comprises a casing (1), an impeller (2) and an axial magnetic field motor (3), the impeller (2) is rotationally arranged in the casing (1), the axial magnetic field motor (3) is arranged in the casing (1), and the impeller (2) rotates under the action of the axial magnetic field motor (3), and the casing (1) is provided with an air inlet (4) and an air outlet (5).

2. The forward multi-wing centrifugal fan of claim 1, wherein, The axial dimension of the axial magnetic field motor (3) is 37-55 mm.

3. The forward multi-wing centrifugal fan of claim 1, wherein, The casing (1) comprises a volute plate (12) and side casings (11) arranged on both sides of the volute plate (12), and the volute plate (12) is arranged in a logarithmic spiral shape.

4. The forward multi-wing centrifugal fan of claim 1, wherein, The impeller (2) is provided with two impellers (2), and the two impellers (2) are symmetrically arranged on both sides of the axial magnetic field motor (3); the casing (1) comprises two accommodating cavities (15) for accommodating the impellers (2), and the accommodating cavities (15) are communicated with the air inlet (4) and the air outlet (5).

5. The forward multi-wing centrifugal fan of claim 4, wherein, The casing (1) comprises a reinforcing rib plate (6), the reinforcing rib plate (6) comprises a connecting plate (61) and two reinforcing plates (62), the two reinforcing plates (62) are symmetrically arranged on both sides of the axial magnetic field motor (3), the two ends of the reinforcing plate (62) are attached to the end walls of the air inlet (4) in the length direction, and the two reinforcing plates (62) are connected through the connecting plate (61).

6. The forward multi-wing centrifugal fan of claim 1, wherein, The casing (1) comprises a first casing (13) and a second casing (14), and the first casing (13) and the second casing (14) are connected through bolts.

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