CN116517680A - Fan assembly and vehicle - Google Patents

Abstract

The invention provides a fan assembly and a vehicle, wherein the fan assembly comprises an assembly outer frame, a fan assembly, a first filter screen, a second filter screen and a pressing piece, wherein the fan assembly, the first filter screen, the second filter screen and the pressing piece are connected to the assembly outer frame; the inspired air of fan unit during operation passes through first filter screen and second filter screen in proper order for the floccule in the air is filtered, avoids the floccule to get into inside influence the water tank heat dissipation of frame, and improves the security. The first filter screen is formed with the cambered surface that is away from fan subassembly's direction convex, can have the component to the week side when floccule and first filter screen contact for the floccule is directed the week side of first filter screen, effectively reduces first outer filter screen and second filter screen and appears the probability of jam. The second filter screen is connected with the assembly frame in a quick assembly disassembly mode through the pressing piece, and therefore the second filter screen is convenient to assemble and disassemble.

Description

Fan assembly and vehicle

technical field

The invention relates to the field of automobiles, and mainly relates to a fan assembly and a vehicle.

Background technique

In the front of the vehicle, there is a frame for installing the engine and the water tank and a fan assembly arranged in front of the frame. When the fan assembly works, the outside air is sucked into the frame to cool down the water tank.

Most of the existing fan assembly frames are designed with openings, so that the fan will be in direct contact with the outside air. When there are flocs floating in the outside air, for example, when used in rural areas in summer and autumn, there will be a large number of catkins floating in the air. And poplar catkins, the flocs will be sucked into the frame by the fan and adhere to the water tank, thus affecting the cooling effect of the water tank, and once there is a leakage phenomenon in the line in the fan assembly, it is easy to ignite the poplar catkins , there are certain potential safety hazards in use.

Contents of the invention

In view of the shortcomings of the above-mentioned prior art, the object of the present invention is to provide a fan assembly and a vehicle to prevent flocs from entering the fan assembly and affecting the cooling effect of the water tank.

In order to achieve the above object, the present invention has taken the following technical solutions:

A fan assembly, comprising: an assembly outer frame and a fan assembly, the fan assembly is fixed on the assembly outer frame; a first filter net is connected to the assembly outer frame and is located on the fan On the air intake side of the assembly, the first filter screen is formed with a protruding arc facing away from the fan assembly; the second filter screen is connected to the outer frame of the assembly and is located between the fan assembly and the fan assembly. Between the first filter screens; a pressing member is arranged on the outer frame of the assembly, and compresses the second filter screen on the outer frame of the assembly.

In some solutions of the present application, a first groove is provided on one side of the outer frame of the assembly, the first groove runs through the side, and the second filter screen is inserted into the first groove. In the groove; the pressing part includes a rotating plate and a rotating shaft, the rotating shaft is connected to the rotating plate, the rotating plate is connected to the outer frame of the assembly through the rotating shaft, and the second rotating plate One end can be turned to the opening of the first groove.

In some solutions of the present application, the pressing member further includes a positioning rod and a positioning cylinder, the positioning rod is slidably connected to the second end of the rotating plate, and the positioning cylinder is fixed on the outer frame of the assembly The positioning cylinder is fixed with a positioning hole for fixing the positioning rod. When the positioning rod is inserted into the positioning hole, the first end of the rotating plate will abut against the outer side of the second filter net. catch.

In some solutions of the present application, a positioning ball is provided on the first end of the positioning rod, the diameter of the positioning ball is larger than the diameter of the positioning hole, and the positioning ball can shrink, so that the positioning ball can Through the positioning hole; the positioning cylinder is also provided with a guide groove and a positioning groove, the guide groove is arranged on the end of the positioning cylinder close to the rotating plate, and the positioning groove is arranged on the back of the positioning cylinder At one end of the rotating plate, the positioning hole is located between the guiding groove and the positioning groove, and communicates with the guiding groove and the positioning groove; the diameter of the end of the guiding groove away from the positioning hole is larger than that of the positioning hole. The diameter of the positioning hole; the diameter of the end of the positioning groove away from the positioning hole is larger than the diameter of the positioning hole.

In some solutions of the present application, the pressing member further includes a handle, the number of the pressing member is at least two, and the second ends of the positioning rods of the pressing member are all connected to the handle.

In some solutions of the present application, the fan assembly further includes an elastic member, one end of the elastic member is fixed on the outer frame of the assembly, the other end abuts against the second filter net, and the elastic member The component can provide a force in a direction to push the second filter net out of the first groove.

In some solutions of the present application, the first groove includes an installation groove and an expansion groove, the second filter screen is installed in the installation groove, and the expansion groove is arranged in the installation groove facing the fan assembly. The expansion slot is connected to the installation slot, and the length of the installation slot is greater than the length of the expansion slot; the end of the second filter screen away from the rotating plate is provided with a second Two guide surfaces, the second guide surface is used to guide the second filter screen into the installation groove; the first end of the rotating plate is provided with a pressure wheel, the pressure wheel and the second filter screen The outer surface abuts; the mesh of the second filter is smaller than the mesh of the first filter.

In some solutions of the present application, the fan assembly further includes a first connecting piece, the first connecting piece is connected to the outer frame of the assembly, and presses the first filter net onto the assembly. on the frame.

In some solutions of the present application, the first connector is provided with a second groove, and the first filter screen is clamped in the second groove; the opening of the second groove is provided with a first A guide surface, the first guide surface is used to guide the first filter net into the second groove.

A vehicle includes a vehicle body, a water tank and the fan assembly, the water tank and the fan assembly are fixed on the vehicle body, and the fan assembly is located in front of the water tank.

Beneficial effects: the fan assembly of the present application includes an assembly frame, a fan assembly, a first filter screen, a second filter screen and a pressing member, the fan assembly is fixed on the assembly frame, the first filter screen and the second filter screen The nets are all connected to the outer frame of the assembly and located on the air intake side of the fan assembly, and the second filter net is located between the fan assembly and the first filter net. Therefore, when the fan assembly is working and inhaling external air, the air needs to pass through the first filter and the second filter in sequence, so that the flocs in the air are filtered out, preventing the flocs from reaching the outlet of the fan assembly. The inside of the frame on the wind side affects the heat dissipation of the water tank and improves safety. Wherein, the first filter screen is formed with an arc surface protruding in the direction away from the fan assembly, and when the flocs contact the first filter screen, there will be a component force to the peripheral side, so that the flocs are guided to the side of the first filter screen. The peripheral side effectively reduces the probability of clogging of the first outer filter and the second filter. The second filter screen is fixed on the outer frame of the assembly through the pressing member, so as to realize the quick disassembly connection between the second filter screen and the outer frame of the assembly, making it more convenient to disassemble the second filter screen.

Description of drawings

FIG. 1 is a perspective view of a fan assembly.

FIG. 2 is a partial enlarged perspective view at A in FIG. 1 .

Fig. 3 is a structural schematic diagram of the first filter net.

Fig. 4 is a schematic structural diagram of the first connecting member.

Fig. 5 is a structural schematic view of the fan assembly after removing the pressing member and the filter screen.

FIG. 6 is a partially enlarged schematic view at B in FIG. 5 .

Fig. 7 is a schematic perspective view of Fig. 5 after sectioning at D-D.

Fig. 8 is a schematic diagram of the connection structure of the second filter screen and the pressing member.

FIG. 9 is a partially enlarged view at point C of FIG. 8 .

Fig. 10 is a structural schematic diagram of the pressing part.

Description of main component symbols:

1-outer frame of the assembly; 11-first connector; 111-second groove; 112-first guide surface; 12-first groove; 16-installation groove; 17-expansion groove;

2 - elastic piece.

3- Fan assembly;

4-pressing part; 41-rotating plate; 42-rotating shaft; 43-positioning rod; 44-positioning ball; 45-handle; 46-pressure wheel; 47-positioning cylinder; 471-positioning hole;

6-the first filter screen; 61-lugs;

7-the second filter screen; 71-the second guide surface.

Detailed ways

The present invention provides a fan assembly and a vehicle. In order to make the purpose, technical solution and effect of the present invention clearer and clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer" and the like are based on the orientation or positional relationship shown in the drawings, and are only for It is convenient to describe the present invention and simplify the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; may be mechanically connected, may also be electrically connected or may communicate with each other; may be directly connected, or indirectly connected through an intermediary, may be the internal communication of two components or the interaction of two components relation. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

A vehicle, including a vehicle body, a water tank, and a fan assembly. The water tank and the fan assembly are fixed on the vehicle body, and the fan assembly is located in front of the water tank. The front in this application is based on the air inlet direction of the fan assembly, with The air inlet side is the front, and the air outlet side is the rear. Wherein, the vehicle also has an engine, and the engine, water tank and fan assembly are all arranged at the front end of the vehicle body, that is, at the front of the vehicle. When the frame and fan assembly work, the outside air is drawn into the frame to cool down the engine and water tank.

Referring to FIG. 1 , FIG. 3 and FIG. 7 , the fan assembly of the present application includes an assembly frame 1 , a fan assembly 3 , a first filter 6 , a second filter 7 and a pressing member 4 . The fan assembly 3 is fixed on the assembly frame 1, the first filter screen 6 and the second filter screen 7 are connected to the assembly frame 1, and are located in front of the fan assembly 3, and the second filter screen 7 is located on the fan assembly 3 Between the first filter net 6. The fan assembly 3 includes a wind wheel and a motor for driving the wind wheel to rotate. The motor is connected to the outer frame 1 of the assembly, and the wind wheel is fixed on the output shaft of the motor. Therefore, when the fan assembly 3 works and sucks the outside air, the air needs to pass through the first filter screen 6 and the second filter screen 7 in sequence, so that the flocs in the air are filtered out, preventing the flocs from reaching the inside of the frame and causing Adhesion to the water tank affects the heat dissipation of the water tank. It also avoids fire inside the floc frame, improving safety. The arrangement of the first filter net 6 and the second filter net 7 also reduces the adhesion of dust to the fan, avoiding the increase of the operating consumption of the fan assembly 3 due to the adhesion of dust to the fan.

Wherein, the first filter screen 6 is formed with an arc surface protruding in the direction away from the fan assembly 3, that is to say, the middle part of the first filter screen 6 protrudes away from the fan assembly 3, and the first filter screen 6 At least one radial dimension gradually increases from the end away from the fan assembly 3 to the side close to the fan assembly 3, for example: the first filter screen 6 is conical, spherical or V-shaped, when the air passes through the first filter screen 6, Since there is an included angle between the direction of air flow and the surface of the first filter 6 , there will be a component force toward the peripheral side of the first filter 6 . When there are flocs in the air passing through the first filter screen 6, there is a component force towards the peripheral side between the flocs and the first filter screen 6, so that the flocs are directed to the peripheral side of the first filter screen 6, The probability of clogging of the first filter screen 6 is effectively reduced, and the frequency of cleaning the fan is also reduced, making the device more convenient to use.

The first filter screen 6 is detachably connected to the assembly outer frame 1, so when the first filter screen 6 needs to be cleaned, the first filter screen 6 can be disassembled from the assembly outer frame 1, which is more convenient for cleaning.

The mesh of the second filter screen 7 is smaller than the mesh of the first filter screen 6, therefore, when the air passes through the first filter screen 6, it is coarsely filtered, and when the air passes through the second filter screen 7, it is finely filtered (that is, it can filter the second filter screen 7). Impurities that cannot be filtered by a filter screen 6), ensure that the impurities in the air are filtered out, and reduce the probability of clogging in the first filter screen 6 and the second filter screen 7.

Specifically, the outer frame 1 of the assembly is fixed with a first connecting piece 11, and the first connecting piece 11 is provided with a second groove 111, and the first filter screen 6 is clamped in the second groove 111 to realize the first filtering The detachable connection between the net 6 and the frame 1 of the assembly.

In the embodiment shown in Fig. 1, the outer frame 1 of the assembly is in the shape of a directional body, and the first connectors 11 are arranged on two adjacent corners of the front end of the outer frame 1 of the assembly, reducing the friction of the second groove 111. The length and depth are convenient for the first filter screen 6 to be inserted into the second groove 111. The first filter screen 6 is fixedly connected with the assembly frame 1 by screws or buckles on the side away from the first connector 11, so that the first filter screen 6 The filter screen 6 is defined in the second groove 111 .

Wherein, in the front of the vehicle, the engine cover is arranged above the vehicle body, and the engine cover can be opened. Therefore, the second groove 111 is arranged on the lower end of the front end of the assembly frame 1, and the screws or buckles for fixing the first filter screen 6 are arranged on the top surface of the assembly frame 1, so that the first filter When the net 6 was cleaned, the engine cover was opened, and the first filter screen 6 could be disassembled, so that the first filter screen 6 was easy to disassemble, and the space required for dismounting the first filter screen 6 was reduced.

Referring to FIG. 4 , the first connecting member 11 has a first guide surface 112 on one side of the opening of the second groove 111 , so that the width of the opening of the second groove 111 is larger than the width of the inside of the second groove 111 . Therefore, when the first filter screen 6 is inserted into the second groove 111 , the first guide surface 112 guides the first filter screen 6 to the inside of the second groove 111 , making the installation more convenient.

In detail, one side of the first filter screen 6 is provided with a lug 61, and the lug 61 is provided with a screw hole, and the screw used to fix the first filter screen 6 passes through the screw hole on the lug 61 and connects with the outside of the assembly. The frame 1 is fixedly connected, and the side of the first filter screen 6 far away from the lug 61 is engaged with the second groove 111 , so that the first filter screen 6 is fixed on the outer frame 1 of the assembly.

In the embodiment shown in FIGS. 1 and 3 , the lug 61 extends toward the rear side of the first filter screen 6 and cooperates with the top surface of the assembly frame 1 so that the screws used to fix the first filter screen 6 It is arranged on the top surface of the outer frame 1 of the assembly, which is convenient for disassembly and assembly. The circular arc transition between the two sides of the lug 61 and the first filter net 6 can improve the stress strength of the lug 61 .

Referring to Fig. 1, Fig. 5 and Fig. 6, the assembly outer frame 1 is provided with a pressing part 4, and the second filter screen 7 is fixed on the assembly outer frame 1 through the pressing part 4, so that the second filter screen 7 and the assembly The fast disassembly and assembly connection between the outer frames 1 makes it more convenient to disassemble and assemble the second filter screen 7.

One side of the assembly outer frame 1 is provided with a first groove 12, the first groove 12 is located between the first filter screen 6 and the fan assembly 3, the first groove 12 runs through the side, and the pressing member 4 is arranged on The opening edge of the first groove 12 , the pressing member 4 can be rotated to the opening of the first groove 12 . The second filter screen 7 is inserted into the first groove 12, and the pressing member 4 presses the second filter screen 7 to the first groove 12, so as to fix the second filter screen 7 on the assembly outer frame 1 .

Referring to Fig. 2, Fig. 8 and Fig. 10, the pressing member 4 includes a rotating plate 41, which is rotatably connected to the outer frame 1 of the assembly, and the first end of the rotating plate 41 can be rotated to the second end relative to the outer frame 1 of the assembly. At the opening of a groove 12, and when the first end of the rotating plate 41 is located at the opening of the first groove 12, it can abut against one side of the second filter screen 7, and fix the second filter screen 7 at the second Inside a groove 12. When the second filter screen 7 needs to be disassembled, swing the rotating plate 41 so that the first end of the rotating plate 41 leaves the opening of the first groove 12, and the rotating plate 41 will not hinder the second filter screen 7 from the first groove. 12 draws.

A pressure wheel 46 is connected to the first end of the rotating plate 41, and the rotating plate 41 abuts against the second filter net 7 through the pressing wheel 46, so that when the rotating plate 41 swings, there is a gap between the pressing wheel 46 and the second filter net 7. For rolling friction, reduce the frictional force, improve the service life of the rotating plate 41 and the second filter screen 7 .

In the embodiment shown in Fig. 1, the opening of the first groove 12 is arranged on the top surface of the assembly outer frame 1, therefore, the second filter screen 7 can be disassembled when the engine cover of the vehicle is opened, so that the first The disassembly and assembly of the second filter screen 7 is convenient, and the space required for disassembly and assembly of the second filter screen 7 is reduced.

A rotating shaft 42 is connected to the middle of the rotating plate 41 , and the rotating plate 41 is rotationally connected to the outer frame 1 of the assembly through the rotating shaft 42 . And the pressing part 4 also includes a positioning rod 43 and a positioning cylinder 47, the positioning rod 43 is slidably connected to the second end of the rotating plate 41, the positioning cylinder 5 is fixed on the assembly outer frame 1, and the positioning cylinder 47 is provided with a positioner for positioning. The positioning hole 471 matched with the rod 43, when the positioning rod 43 is inserted in the positioning hole 471, the rotating plate 41 cannot rotate around the rotating shaft 42, and the first end of the rotating plate 41 abuts against the outside of the second filter screen 7.

Wherein, positioning bar 43 and pinch roller 46 are respectively positioned at the both sides of rotating shaft 42, and when making rotating plate 41 rotate around the axis of rotating shaft 42, positioning bar 43 and pinching wheel 46 that are respectively arranged on rotating plate 41 both ends all move, when positioning When the rod 43 is located at the position of the positioning hole 471, the positioning rod 43 is inserted in the positioning hole 471 so that the rotating plate 41 cannot rotate. fixed.

A positioning ball 44 is disposed on the first end of the positioning rod 43 . The diameter of the positioning ball 44 is larger than that of the positioning hole 471 , and the positioning ball 44 can shrink. When the positioning rod 43 is inserted into the positioning hole 471 , the positioning ball 44 is elastically deformed to shrink, thereby allowing the positioning rod 43 to pass through the positioning hole 471 . After the positioning rod 43 passes through the positioning hole 471, the positioning ball 44 returns to the state before shrinking. At this time, the diameter of the positioning ball 44 is greater than the diameter of the positioning hole 471, so that the positioning rod 43 cannot withdraw from the positioning without the effect of external force. The hole 471 realizes the fixing of the positioning rod 43 . When the second filter screen 7 needs to be disassembled, the operator pulls the positioning rod 43 outwards, so that the positioning ball 44 elastically shrinks, and then the positioning rod 43 can be separated from the positioning hole 471, and then the rotating plate 41 can be rotated, so that the pressing wheel 46 is no longer Abut against the outside of the second filter net 7 , and then the second filter net 7 can be pulled out from the first groove 12 .

Wherein, the diameter of the positioning rod 43 is equal to or slightly smaller than the diameter of the positioning hole 471 to realize the cooperation between the positioning rod 43 and the positioning hole 471 . In the embodiment of the application, the positioning ball 44 is used as a structure with contraction ability, so that the positioning rod 43 is inserted behind the positioning hole 471, and the side wall of the positioning rod 43 cooperates with the inner wall of the positioning hole 471, which can well limit the position of the positioning rod 43. movement in the radial direction, and the positioning ball 44 can limit the movement of the positioning rod 43 in the axial direction.

The positioning cylinder 47 is also provided with a guide groove 472 and a positioning groove (not shown in the figure, located at the position where the positioning ball 44 cooperates with the positioning cylinder 47 in FIG. The positioning groove is provided at the end of the positioning cylinder 47 facing away from the rotating plate 41, the positioning hole 471 is located between the guiding groove 472 and the positioning groove, and communicates with the guiding groove 472 and the positioning groove. The diameter of the end of the guide groove 472 away from the positioning hole 471 is greater than the diameter of the positioning hole 471. When the positioning rod 43 is inserted into the positioning hole 471, the positioning ball 44 is first positioned at the position of the guiding groove 472, and then the positioning rod 43 is applied to the inside of the positioning hole 471. The pressure causes the positioning ball 44 to elastically deform under the guidance of the guide groove 472 and pass through the positioning hole 471 into the positioning groove to facilitate the insertion of the positioning rod 43 into the positioning hole 471 . In the structures shown in FIGS. 6 and 10 , the guide groove 472 is hemispherical. In other embodiments, the shape of the guiding groove 472 is not limited.

The diameter of the positioning groove is adapted to the diameter of the positioning hole 471, so that when the positioning ball 44 enters the positioning groove, the positioning ball 44 is released, that is, the positioning ball 44 is released to a state larger than the positioning hole 471, and the positioning ball 44 and the positioning groove are realized. are engaged with each other, thereby realizing the fixing of the position of the positioning rod 43 . Preferably, the diameter of the positioning groove is equal to the diameter of the positioning ball 44 , so that the positioning groove and the positioning ball 44 are compatible.

In the above, the positioning groove, the guiding groove 472 and the positioning hole 471 are all provided on the positioning cylinder 47, so that the processing of the positioning groove, the guiding groove 472 and the positioning hole 471 is convenient. The positioning ball 44 is made of rubber material, silicone material or the like.

The pressing part 4 also includes a handle 45, the number of the pressing part 4 is at least two, and the pressing part 4 is arranged at intervals on the same straight line, and the second ends of the positioning rods 43 of the pressing part 4 are all connected with the handle 45, so that Through the handle 45, multiple positioning rods 43 can be operated at the same time, so the operation is more convenient. In the embodiment of FIG. 1 , there are two pressing pieces 4 , and the two pressing pieces 4 are respectively located at both ends of the first groove 12 in the length direction. Wherein, the depth direction of the first groove 12 is the up-down direction, the width direction of the first groove 12 is the front-rear direction, and the length direction of the first groove 12 refers to a direction perpendicular to both the depth direction and the width direction, that is, the left-right direction.

There is a distance between the handle 45 and the outer frame 1 of the assembly, and the distance between the handle 45 and the outer frame 1 of the assembly can be used by the operator to put his hand in, which is convenient for the operator to hold the handle 45 . In one embodiment, the distance between the handle 45 and the outer frame 1 of the assembly is greater than or equal to 3 cm.

Referring to FIG. 6 and FIG. 7 , the fan assembly further includes an elastic member 2 , which is preferably but not limited to a spring. One end of the elastic member 2 is fixed on the outer frame 1 of the assembly, and the other end abuts against the second filter 7 , and the elastic member 2 can provide a force to push the second filter to exit the first groove 12 .

In the embodiment shown in Fig. 5 and Fig. 6, the elastic member 2 is arranged on the edge of the opening end of the first groove 12, and the axis of the elastic member 2 and the depth direction of the first groove 12 (that is, the first groove 12 The direction in which the opening extends to the bottom) is the same, and the second filter screen 7 is designed in a "T" shape, so that the elastic member 2 can abut against the second filter screen 7, and when the pressure wheel 46 is no longer pressed against the second filter screen When the net 7 is on, the elastic force of the elastic member 2 can pop the second filter net 7 out of the first groove 12 for a certain distance, and then guide the operator to pull the second filter net 7 out of the first groove 12 .

Referring to FIG. 6 , the first groove 12 includes an installation groove 121 and an expansion groove 122 , and the second filter screen 7 is installed in the installation groove 121 . Wherein, when the second filter net 7 is installed, the installation groove 121 will limit the sliding track of the second filter net 7 to ensure that the sliding of the second filter net 7 is a vertical lift slide. The expansion slot 122 is disposed on the side of the installation slot 121 facing the air intake of the fan assembly, and one side of the expansion slot 122 communicates with the installation slot 121 , and the installation slot 121 is longer than the expansion slot 122 . In detail, the rear side of the expansion groove 122 communicates with the installation groove 121, and the expansion groove 122 corresponds to the filter cloth position of the second filter screen 7, so that the front side of the filter cloth position of the second filter screen 7 is connected to the rear side of the expansion groove 122. There is a distance between the side wall surfaces, and when the second filter screen 7 is removed, the filter cloth of the second filter screen 7 will not contact the side wall of the installation groove 121, so that when the second filter screen 7 is taken out, the second filter cloth 7 The dust adhered on the filter cloth of the second filter screen 7 will not be scraped off by the side walls of the mounting groove 121 .

Preferably, the second filter screen 7 can completely cover the openings of the installation slot 121 and the expansion slot 122 on the side of the opening of the first groove 12, so that all the air sucked by the fan assembly 3 passes through the first filter screen 6 and the second filter screen 6. The second filter screen 7 will not enter the inside from the opening of the first groove 12 .

Referring to FIG. 8 and FIG. 9 , in the above embodiment, the filter cloth of the second filter screen 7 is designed as a woven filter screen, so that the second filter screen 7 can be used after multiple cleaning cycles. At least one side of the end portion of the second filter screen 7 away from the pressure roller 46 is inclined to form a second guide surface 71, so that the second filter screen 7 can be guided by its end slope when installed, thereby reducing the pressure on the second filter screen 7. The difficulty of installing the second filter screen 7 makes it easier to install. In the embodiment shown in FIG. 9 , both sides of the end portion of the second filter screen 7 away from the pressure roller 46 are inclined.

In the above, the second filter net 7 and the first filter net 6 are arranged at intervals, so that when the second filter net 7 and the first filter net 6 cannot be disassembled, the two will not interfere with each other.

It can be understood that those skilled in the art can make equivalent substitutions or changes according to the technical solution and the inventive concept of the present invention, and all these changes or substitutions should belong to the protection scope of the present invention.

Claims (10)

1. A fan assembly, characterized in that it comprises: an assembly frame and a fan assembly, the fan assembly is fixed on the assembly frame; The first filter screen is connected to the outer frame of the assembly and is located on the air intake side of the fan assembly, and the first filter screen is formed with an arc protruding away from the direction of the fan assembly; a second filter net, connected to the outer frame of the assembly, and located between the fan assembly and the first filter net; The pressing part is arranged on the outer frame of the assembly, and presses the second filter screen on the outer frame of the assembly. 2. The fan assembly according to claim 1, wherein a first groove is provided on one side of the outer frame of the assembly, the first groove runs through the side, and the second filter The net is inserted into the first groove; The pressing member includes a rotating plate and a rotating shaft, the rotating shaft is connected to the rotating plate, the rotating plate is rotatably connected to the outer frame of the assembly through the rotating shaft, and the first end of the rotating plate can Turn to the opening of the first groove. 3. The fan assembly according to claim 2, wherein the pressing member further comprises a positioning rod and a positioning cylinder, the positioning rod is slidably connected to the second end of the rotating plate, and the positioning cylinder It is fixed on the outer frame of the assembly, and the positioning cylinder is provided with a positioning hole for matching with the positioning rod. When the positioning rod is inserted into the positioning hole, the first end of the rotating plate and the abut against the outer side of the second filter net. 4. The fan assembly according to claim 3, wherein: A positioning ball is provided on the first end of the positioning rod, the diameter of the positioning ball is larger than the diameter of the positioning hole, and the positioning ball can shrink so that the positioning ball can pass through the positioning hole; The positioning cylinder is also provided with a guide groove and a positioning groove, the guide groove is arranged at the end of the positioning cylinder close to the rotating plate, and the positioning groove is arranged at the end of the positioning cylinder facing away from the rotating plate , the positioning hole is located between the guiding groove and the positioning groove, and communicates with the guiding groove and the positioning groove; The diameter of the end of the guide groove away from the positioning hole is larger than the diameter of the positioning hole; The diameter of the end of the positioning groove away from the positioning hole is larger than the diameter of the positioning hole. 5. The fan assembly according to claim 3, wherein: The pressing part also includes a handle, the number of the pressing parts is at least two, and the second ends of the positioning rods of the pressing part are all connected to the handle. 6. The fan assembly according to claim 2, further comprising an elastic member, one end of the elastic member is fixed on the outer frame of the assembly, and the other end is connected to the second The filter screen abuts, and the elastic member can provide a force in a direction to push the second filter screen out of the first groove. 7. The fan assembly of claim 2, wherein: The first groove includes an installation groove and an expansion groove, the second filter screen is installed in the installation groove, the expansion groove is arranged on the side of the installation groove facing the air inlet of the fan assembly, and The expansion groove communicates with the installation groove, and the length of the installation groove is greater than the length of the expansion groove; The end of the second filter screen away from the rotating plate is provided with a second guide surface, and the second guide surface is used to guide the second filter screen into the installation groove; A pressure wheel is provided on the first end of the rotating plate, and the pressure wheel abuts against the outer surface of the second filter screen; The mesh of the second filter is smaller than the mesh of the first filter. 8. The fan assembly according to any one of claims 1-7, characterized in that, the fan assembly further comprises a first connecting piece, the first connecting piece is connected to the outer frame of the assembly, and Pressing the first filter net onto the outer frame of the assembly. 9 . The fan assembly according to claim 8 , wherein the first connecting member is provided with a second groove, and the first filter mesh is clipped into the second groove; The opening of the second groove is provided with a first guide surface, and the first guide surface is used to guide the first filter net into the second groove. 10. A vehicle, characterized by comprising a vehicle body, a water tank and the fan assembly according to any one of claims 1-9, the water tank and the fan assembly are both fixed on the vehicle body, And the fan assembly is located in front of the water tank.