Noise reduction structure of fan, fan and scrubber

Abstract

The utility model relates to the technical field of machine manufacturing, in particular to a noise reduction structure of a fan, the fan and a scrubber. The fan comprises a dynamic flow guide part and a static flow guide part, the dynamic flow guide part is in transmission connection with a rotating shaft of the fan, the static flow guide part is fixedly connected with a fan cover shell of the fan, and the dynamic flow guide part is coaxially connected with the static flow guide part; the static flow guide part comprises a plurality of first flow guide blades, and the multiple first flow guide blades surround the periphery of the static flow guide part to form a flow guide space; the non-air-inlet end of the dynamic flow guide part is arranged in the flow guide space; by arranging the dynamic flow guide piece and the static flow guide piece, flow guide is conducted on air in the draught fan, vortex generated by dynamic and static interference is avoided, and noise of the draught fan is lowered.

Description

Technical Field

[0001] The present application relates to the field of mechanical manufacturing technology, and in particular to a noise reduction structure of a fan, a fan and a floor scrubber. Background Art

[0002] In the prior art, fans are used in various mechanical fields. For example, fans are used in floor scrubbers. However, fans are often accompanied by huge noise. Specifically, the high-speed rotating impeller in the fan produces dynamic and static interference with other flow-through components, generating eddy currents. The presence of eddy currents causes the fan to produce relatively high noise. Summary of the invention

[0003] In view of the above-mentioned problems in the prior art, the purpose of the present application is to provide dynamic guide members and static guide members to guide the wind in the fan, thereby avoiding vortices caused by dynamic and static interference, and thus reducing the noise of the fan.

[0004] In order to solve the above problems, the present application provides a noise reduction structure of a fan, including a dynamic guide member and a static guide member.

[0005] The dynamic flow guide is connected to the rotating shaft of the fan by transmission, the static flow guide is fixedly connected to the fan housing, and the dynamic flow guide is coaxially connected to the static flow guide;

[0006] The static flow guide member includes a plurality of first flow guide blades, and the plurality of first flow guide blades are enclosed at the periphery of the static flow guide member to form a flow guide space;

[0007] The non-air inlet end of the dynamic flow guide is arranged in the flow guide space.

[0008] Preferably, the dynamic guide member includes a plurality of second guide blades, and the guide direction of the first guide blades is perpendicular to the guide direction of the second guide blades.

[0009] Preferably, the static flow guide comprises a fixed base, and the flow guide space comprises an air inlet end space and a non-air inlet end space;

[0010] The fixed base is arranged in the non-air inlet end space, and the non-air inlet end of the dynamic air guide member is arranged in the air inlet end space.

[0011] Preferably, the spatial height of the air inlet end is 0.3 to 0.5 times the height of the dynamic flow guide member.

[0012] Preferably, the height of the dynamic flow guide is 4.8 mm.

[0013] Preferably, the first guide vane comprises a protruding end plate and a fixed end plate, the fixed end plate is located in the non-air inlet end space, and the fixed end plate is fixedly connected to the fixed base;

[0014] The extended end plate is located in the air inlet end space.

[0015] Preferably, the extended end plate is a straight plate.

[0016] Preferably, the angle between the protruding end plate and the axis of the static guide member is 20° to 30°.

[0017] On the other hand, the present application also provides a fan, and the floor scrubber includes the noise reduction structure of the above-mentioned fan.

[0018] On the other hand, the present application also provides a floor scrubber, which includes the noise reduction structure of the above-mentioned fan.

[0019] Due to the above technical solution, the noise reduction structure of the fan described in this application has the following beneficial effects:

[0020] By arranging a dynamic guide member and a static guide member, the non-air inlet end of the dynamic guide member is arranged in the guide space. Specifically, the guide space is formed by enclosing a plurality of first guide blades, that is, the static guide member wraps the non-air inlet end of the dynamic guide member; while the dynamic guide member guides the wind from the air inlet end to the non-air inlet end, it can directly enter the static guide member for guidance, thereby avoiding vortices caused by dynamic and static interference between the dynamic guide member and the static guide member, and the wind can flow into the fan evenly, thereby reducing the noise of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the embodiments or prior art descriptions. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a schematic diagram of the relative position relationship between a dynamic flow guide member and a static flow guide member in a noise reduction structure of a fan provided in an embodiment of the present application;

[0023] Figure 2 It is a schematic diagram of the assembly of a noise reduction structure in a fan provided in an embodiment of the present application.

[0024] Among them, 1-dynamic guide member, 11-second guide blade, 2-static guide member, 21-first guide blade, 211-extending end plate, 212-fixed end plate, 22-fixed base, 3-rotating shaft, 4-wind hood shell. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0026] The term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present application. In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying 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 of the present application. In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may include one or more of the features explicitly or implicitly. Moreover, the terms "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here.

[0027] Combination Figure 1-2 , introduces a noise reduction structure of a fan provided in an embodiment of the present application, including a dynamic guide member 1 and a static guide member 2, the dynamic guide member 1 is transmission-connected to a rotating shaft 3 of the fan, the static guide member 2 is fixedly connected to a wind shield shell 4 of the fan, and the dynamic guide member 1 is coaxially connected to the static guide member 2; the static guide member 2 includes a plurality of first guide blades 21, and the plurality of first guide blades 21 are enclosed on the periphery of the static guide member 2 to form a guide space; the non-air inlet end of the dynamic guide member 1 is arranged in the guide space.

[0028] In the embodiment of the present application, the dynamic flow guide member 1 rotates based on the rotation of the fan shaft 3, thereby sucking the external wind into the fan; at the same time, the dynamic flow guide member 1 is used to guide the sucked wind and guide the wind to the static flow guide member 2; the static flow guide member 2 is fixed relative to the fan casing, and the static flow guide member 2 is used to guide the wind guided by the dynamic flow guide member 1 to the air outlet.

[0029] In a specific embodiment of the present application, the dynamic flow guide member 1 is a moving impeller, and the static flow guide member 2 is a first-stage stationary blade.

[0030] In a specific embodiment of the present application, the fan further includes secondary stationary blades, and the wind flow flows through the primary stationary blades and then flows into the secondary stationary blades for guidance.

[0031] In an embodiment of the present application, a dynamic guide member 1 and a static guide member 2 are provided, and the non-air inlet end of the dynamic guide member 1 is provided in a guide space. Specifically, the guide space is formed by enclosing a plurality of first guide blades 21, that is, the static guide member 2 wraps the non-air inlet end of the dynamic guide member 1; while the dynamic guide member 1 guides the wind from the air inlet end to the non-air inlet end, it can directly enter the static guide member 2 for guidance, thereby avoiding vortices generated by dynamic and static interference between the dynamic guide member 1 and the static guide member 2, and the wind can flow into the fan evenly, thereby reducing the noise of the fan.

[0032] In the embodiment of the present application, the dynamic guide member 1 includes a plurality of second guide blades 11 , and the guide direction of the first guide blade 21 is perpendicular to the guide direction of the second guide blade 11 .

[0033] In the embodiment of the present application, by setting the guiding direction of the first guide blade 21 to be perpendicular to the guiding direction of the second guide blade 11, the vortex generated by the dynamic and static interference between the dynamic guide member 1 and the static guide member 2 is further avoided, and the wind can flow into the fan evenly, thereby reducing the noise of the fan.

[0034] In the embodiment of the present application, the second guide blade 11 is used to guide the inhaled wind to the static guide member 2; the first guide blade 21 is used to guide the wind guided by the dynamic guide member 1 to the air outlet.

[0035] In an embodiment of the present application, the static guide member 2 includes a fixed base 22, and the guide space includes an air inlet end space and a non-air inlet end space; the fixed base 22 is arranged in the non-air inlet end space, and the non-air inlet end of the dynamic guide member 1 is arranged in the air inlet end space.

[0036] In the embodiment of the present application, a fixed base 22 is provided in the non-air inlet end space of the static guide member 2, and the static guide member 2 is fixedly connected to the rotating shaft 3, so that the non-air inlet end of the dynamic guide member 1 can be provided in the air inlet end space of the static guide member 2, so that the static guide member 2 wraps the non-air inlet end of the dynamic guide member 1, thereby avoiding the vortex generated by the dynamic and static interference between the dynamic guide member 1 and the static guide member 2, and the wind can flow into the fan evenly, thereby reducing the noise of the fan.

[0037] In a preferred embodiment of the present application, the spatial height of the air inlet end is 0.3 to 0.5 times the height of the dynamic flow guide member 1 .

[0038] In an embodiment of the present application, the spatial height of the air inlet end space is set to 0.3 to 0.5 times the height of the dynamic guide member 1, so as to further avoid eddy currents generated by dynamic and static interference between the dynamic guide member 1 and the static guide member 2. The wind can flow into the fan evenly, thereby reducing the noise of the fan.

[0039] In the specific embodiment of the present application, the height of the dynamic flow guide member 1 is 4.8 mm.

[0040] In the embodiment of the present application, the first guide vane 21 includes an extended end plate 211 and a fixed end plate 212. The fixed end plate 212 is located in the non-inlet end space and is fixedly connected to the fixed base 22. The extended end plate 211 is located in the inlet end space.

[0041] In the embodiment of the present application, an extended end plate 211 is provided on the first guide blade 21, so that the non-air inlet end of the dynamic guide member 1 is provided in the air inlet end space of the static guide member 2, so that the static guide member 2 wraps the non-air inlet end of the dynamic guide member 1, thereby avoiding the vortex generated by the dynamic and static interference between the dynamic guide member 1 and the static guide member 2, and the wind can flow into the fan evenly, thereby reducing the noise of the fan.

[0042] In the specific embodiment of the present application, the extended end plate 211 is a straight plate.

[0043] In another specific embodiment of the present application, the protruding end plate 211 is a curved plate.

[0044] In the embodiment of the present application, the angle between the protruding end plate 211 and the axis of the static flow guide member 2 is 20° to 30°; specifically, the angle β shown in the reference figure is the angle between the protruding end plate 211 and the axis of the static flow guide member 2.

[0045] In the embodiment of the present application, the working principle of the fan is as follows:

[0046] The dynamic guide member 1 rotates based on the rotation of the fan shaft 3, thereby sucking the external wind into the fan; at the same time, the dynamic guide member 1 is used to guide the sucked wind, and the wind flows into the first guide blade 21 after passing through the second guide blade 11, that is, the dynamic guide member 1 guides the sucked wind to the static guide member 2, and the static guide member 2 guides the wind guided by the dynamic guide member 1 to the air outlet.

[0047] The fan in the embodiment of the present application has the following beneficial effects:

[0048] By setting a dynamic guide member 1 and a static guide member 2, the non-air inlet end of the dynamic guide member 1 is set in the guide space. Specifically, the guide space is formed by enclosing a plurality of first guide blades 21, that is, the static guide member 2 wraps the non-air inlet end of the dynamic guide member 1; while the dynamic guide member 1 guides the wind from the air inlet end to the non-air inlet end, it can directly enter the static guide member 2 for guidance, thereby avoiding vortices caused by dynamic and static interference between the dynamic guide member 1 and the static guide member 2, and the wind can flow into the fan evenly, thereby reducing the noise of the fan.

[0049] An embodiment of the present application also provides a fan, which includes the noise reduction structure of the fan provided in the embodiment of the present application.

[0050] An embodiment of the present application further provides a floor scrubber, which includes the fan in the embodiment of the present application and a noise reduction structure of the fan. The beneficial effects of the floor scrubber are consistent with those of the fan in the embodiment of the present application, and will not be elaborated herein.

[0051] In other embodiments of the present application, the above-mentioned fan and the noise reduction structure of the fan can also be applied to other fan application scenarios, such as range hoods and vacuum cleaners.

[0052] The above description has fully disclosed the specific implementation methods of the present application. It should be pointed out that any changes made by technicians familiar with the field to the specific implementation methods of the present application do not deviate from the scope of the claims of the present application. Accordingly, the scope of the claims of the present application is not limited to the above specific implementation methods.

Claims

1. A noise reduction structure for a fan, characterized in that: It comprises a dynamic flow guide (1) and a static flow guide (2), The dynamic flow guide (1) is in driving connection with the rotating shaft (3) of the fan, the static flow guide (2) is fixedly connected with the fan housing (4), and the dynamic flow guide (1) is coaxially connected with the static flow guide (2); The static flow guide member (2) comprises a plurality of first flow guide blades (21), wherein the plurality of first flow guide blades (21) are enclosed at the periphery of the static flow guide member (2) to form a flow guide space; The non-air inlet end of the dynamic flow guide (1) is arranged in the flow guide space.

2. The noise reduction structure of the fan according to claim 1, characterized in that: The dynamic flow guide member (1) comprises a plurality of second flow guide blades (11), and the flow guide direction of the first flow guide blades (21) is perpendicular to the flow guide direction of the second flow guide blades (11).

3. The noise reduction structure of the fan according to claim 1, characterized in that: The static flow guide (2) comprises a fixed base (22), and the flow guide space comprises an air inlet end space and a non-air inlet end space; The fixed base (22) is arranged in the non-air inlet end space, and the non-air inlet end of the dynamic air guide member (1) is arranged in the air inlet end space.

4. The noise reduction structure of the fan according to claim 3, characterized in that: The spatial height of the air inlet end is 0.3 to 0.5 times the height of the dynamic flow guide (1).

5. The noise reduction structure of the fan according to claim 4, characterized in that: The height of the dynamic flow guide (1) is 4.8 mm.

6. The noise reduction structure of the fan according to claim 3, characterized in that: The first guide blade (21) comprises a protruding end plate (211) and a fixed end plate (212), wherein the fixed end plate (212) is located in the non-air inlet end space, and the fixed end plate (212) is fixedly connected to the fixed base (22); The extended end plate (211) is located in the air inlet end space.

7. The noise reduction structure of the fan according to claim 6, characterized in that: The protruding end plate (211) is a straight plate.

8. The noise reduction structure of the fan according to claim 6, characterized in that: The included angle between the axis of the protruding end plate (211) and the static flow guide member (2) is 20° to 30°.

9. A fan, characterized in that: The invention comprises a noise reduction structure of a fan as described in any one of claims 1 to 8.

10. A floor scrubber, characterized in that: The invention comprises a noise reduction structure of a fan as described in any one of claims 1 to 8.

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