Forward-tilting multi-wing type silent fan

Abstract

The utility model provides a forerake multi-wing type silent fan which comprises a fan shell and a wind wheel installed in an inner cavity of the fan shell and further comprises a motor, an air inlet and an air outlet are formed in the two adjacent side faces of the fan shell respectively, the air inlet and the air outlet are communicated with the inner cavity of the fan shell respectively, and the motor is connected with the fan shell. Mounting holes with the same opening size are formed in a pair of opposite side faces of the fan shell correspondingly, and the air inlet and the motor are fixedly mounted on the pair of mounting holes correspondingly. The mounting holes with the same size are respectively formed in the two opposite side surfaces of the fan shell, so that the mounting positions of the air inlet and the motor can be flexibly adjusted in an occasion with limited space to ensure that the motor can still be mounted at a position convenient to maintain under the condition of normal air intake, and the maintenance efficiency is improved. And later maintenance personnel can conveniently overhaul and maintain the motor.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, specifically to a forward-tilted multi-blade silent fan. Background Technology

[0002] Forward-curved multi-blade silent fans refer to fans where the impeller blades rotate in the same direction as the rotor. They are suitable for medium wind pressure applications with limited space. Their structure is simple, and their manufacturing and maintenance costs are lower than those of backward-curved fans. The impeller of a forward-curved multi-blade fan has a dense arrangement of multiple short blades (typically 26-64 blades), with the blades curving in the same direction as the impeller's rotation, enabling the generation of higher wind pressure at lower speeds.

[0003] Because forward-tilting multi-blade silent fans are installed in spaces with limited space, the positions of the air inlet and outlet need to be considered during installation. Furthermore, during later maintenance, the motor needs to be inspected and maintained. Typically, the motor is installed in a position convenient for maintenance personnel to access. However, in some space-constrained situations, after considering the positions of the air inlet and outlet, it becomes impossible to consider the motor's installation position, leading to inconvenience for later motor maintenance. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a forward-tilting multi-blade silent fan, so as to solve the problem that when the existing forward-tilting multi-blade silent fan is used in space-constrained situations, after taking into account the positions of the air inlet and outlet, it is impossible to consider the installation position of the motor, which brings inconvenience to the later motor maintenance.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] This application provides a forward-tilting multi-blade silent fan, including a fan housing and an impeller installed in the inner cavity of the fan housing, and a motor. An air inlet and an air outlet are respectively provided on adjacent two side surfaces of the fan housing, and the air inlet and the air outlet are respectively connected to the inner cavity of the fan housing. Mounting holes with the same opening size are respectively opened on a pair of opposite side surfaces of the fan housing, and the air inlet and the motor are respectively fixedly mounted on a pair of mounting holes.

[0007] Furthermore, the inner cavity of the surrounding shell of the fan housing is filled with a polyurethane filling layer.

[0008] Furthermore, connection holes are respectively provided on the side of the fan housing opposite to the air outlet and on the two opposite sides located between the air inlet and the motor.

[0009] Furthermore, it also includes an air guide ring, through which the air inlet is fixedly installed on the mounting hole.

[0010] Furthermore, it also includes a motor mounting plate, through which the motor is fixedly mounted on the mounting hole.

[0011] The beneficial effects of this utility model are as follows:

[0012] 1. By adopting the above-mentioned forward-inclined multi-blade silent fan, and utilizing the mounting holes of the same size opened on the opposite two sides of the fan casing, the installation positions of the air inlet and the motor can be flexibly adjusted in situations where space is limited, so as to ensure that the motor can still be installed in a position that is easy to maintain under normal air intake conditions, making it convenient for maintenance personnel to inspect and maintain the motor later.

[0013] 2. By filling the interior of the wind turbine casing with a polyurethane filling layer around the perimeter, the presence of the polyurethane filling layer can improve the noise reduction of the wind turbine. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the forward-tilting multi-blade silent fan in an embodiment of this application.

[0015] Figure 2 This is a three-dimensional structural diagram of the forward-tilting multi-blade silent fan in an embodiment of this application from another angle.

[0016] Figure 3 This is a rear-view structural diagram of the forward-tilting multi-blade silent fan in an embodiment of this application.

[0017] Figure 4 for Figure 3 A schematic diagram of the AA-direction cross-section structure.

[0018] Figure 5 for Figure 4 A magnified schematic diagram of the structure at point B in the diagram.

[0019] In the picture:

[0020] 10-Forward-inclined multi-blade silent fan;

[0021] 100-Fan casing, 101-Casing, 102-Upper side, 103-Front side, 104-Left side, 105-Right side, 106-Rear side, 107-Bottom side;

[0022] 200 - Motor;

[0023] 300-Motor mounting plate;

[0024] 400-Connection hole;

[0025] 500 - Air Inlet;

[0026] 600-Air guide ring;

[0027] 700 - Air outlet;

[0028] 800 - Polyurethane filler layer. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0030] See appendix Figure 1 To be continued Figure 3 As shown, this embodiment provides a forward-tilting multi-blade silent fan 10, including a fan housing 100, a fan wheel, a motor 200, an air inlet 500, and an air outlet 700. The fan wheel is rotatably installed in the inner cavity of the fan housing 100. The air outlet 700 is located on the upper side 102 of the fan housing 100 and is connected to the inner cavity of the fan housing 100. The air inlet 500 is located on the front side 103 of the fan housing 100, and is also connected to the inner cavity of the fan housing 100. The motor 200 is connected to the fan wheel and is used to drive the fan wheel to rotate, thereby compressing the air drawn in by the air inlet 500 inside the fan wheel and then flowing out through the air outlet 700.

[0031] Continue to refer to the appendix Figure 1 To be continued Figure 3 As shown, in this embodiment, the motor 200 is mounted on the rear side 106 of the fan housing 100, meaning the motor 200 is positioned opposite the air inlet 500. Simultaneously, the front side 103 and rear side 106 of the fan housing 100 each have mounting holes of the same size. This allows for adjustments to the mounting positions of the motor 200 and air inlet 500 on the fan housing 100 during actual installation. In space-constrained environments, the mounting positions of the air inlet 500 and motor 200 can be flexibly adjusted to ensure that the motor 200 can still be installed in a convenient maintenance location under normal air intake conditions, facilitating future maintenance and repair of the motor 200.

[0032] See attached document Figure 1 and attached Figure 2As shown, in some embodiments, the air inlet 500 is fixedly mounted on the fan housing 100 via a provided air guide ring 600, and the motor 200 is fixedly mounted on the fan housing 100 via a provided motor mounting plate 300. The screw holes at the outer edges of the mounting holes on the front side 103 and rear side 106 of the fan housing 100 are in the same position, that is, the mounting hole positions of the air guide ring 600 and the motor mounting plate 300 are the same. Thus, when it is necessary to interchange the mounting positions of the motor 200 and the air inlet 500, the mounting positions of the air guide ring 600 and the motor mounting plate 300 can be easily changed to achieve the position swap of the motor 200 and the air inlet 500.

[0033] Continue to refer to the appendix Figure 1 and attached Figure 2 As shown, in some embodiments, multiple connection holes 400 are provided on the bottom side 107 and the outer edges of the left and right sides of the fan housing 100. This arrangement allows the forward-tilting multi-blade silent fan to be installed on different mounting sides to adjust the air outlet position of the air outlet 700.

[0034] See attached document Figure 1 As shown, for example, when installing on the bottom side 107 of the fan housing 100, the mounting bracket is fixed to the connecting hole 400 of the bottom side 107 of the fan housing 100 with bolts, so that the air outlet 700 is located above the fan housing 100, achieving the installation effect of top air outlet; as another example, when installing on the left side 104 of the fan housing 100, the mounting bracket is fixed to the connecting hole 400 of the left side 104 of the fan housing 100 with bolts, so that the air outlet 700 is located on the left side of the fan housing 100, achieving the installation effect of left air outlet; as yet another example, when installing on the right side 105 of the fan housing 100, the mounting bracket is fixed to the connecting hole 400 of the right side 105 of the fan housing with bolts, so that the air outlet 700 is located on the right side of the fan housing 100, achieving the installation effect of right air outlet.

[0035] By forming connection holes 400 at the outer edges of the bottom side 107 and the left and right sides 105 and 106 of the fan housing 100, the installer can flexibly choose the mounting surface of the fan housing 100 to adjust the orientation of the air outlet 700 in some situations where the installation space is limited, so as to ensure the air outlet 700 meets the air output requirements and improve the versatility of the forward-tilting multi-blade silent fan.

[0036] See attached document Figure 4 and attached Figure 5As shown, in order to improve the sound insulation effect of the forward-tilting multi-blade silent fan, a polyurethane filling layer 800 is filled in the inner cavity of the shell 101 around the fan housing 100. The presence of the polyurethane filling layer 800 can improve the sound insulation effect of the fan housing 100 on the noise generated by the impeller during use.

[0037] The polyurethane filling layer 800 fills the inner cavity of the surrounding housing 101 of the fan housing. Liquid polyurethane can be injected through an injection hole provided at the top side of the fan housing 100. After injection, a plug is installed on the injection hole to seal it.

[0038] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A forward-curved multi-blade silent fan comprising a fan housing and a fan wheel mounted in an inner cavity of the fan housing, characterized in that, It also includes a motor, the fan housing on two adjacent sides are provided with an air inlet and an air outlet, the air inlet and the air outlet are communicated with the inner cavity of the fan housing, a pair of opposite sides of the fan housing are respectively provided with mounting holes with the same opening size, the air inlet and the motor are respectively fixedly installed on a pair of mounting holes; the side of the fan housing relative to the air outlet and the opposite sides between the air inlet and the motor are respectively provided with connecting holes.

2. A forward-curved multi-bladed silent fan according to claim 1, wherein, The inner cavity of the four surrounding shells of the fan housing is filled with a polyurethane filling layer.

3. A forward-curved multi-bladed silent fan as claimed in claim 1, wherein, It also includes a wind guide ring, the air inlet is fixedly installed on the mounting hole through the wind guide ring.

4. A forward-curved multi-bladed silent fan as claimed in claim 1, wherein, It also includes a motor fixing plate, the motor is fixedly installed on the mounting hole through the motor fixing plate.

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