Axial flow fan for refrigeration and air conditioning

Abstract

The present invention discloses an axial flow fan for refrigeration and air conditioning, and relates to the field of air conditioning and refrigeration. An axial flow fan for refrigeration and air conditioning comprises an axial flow fan housing and an axial flow fan body, wherein the inner side of the axial flow fan housing is provided with the axial flow fan body, and the axial flow fan body comprises a motor, a main shaft, a first reciprocating screw and a fan blade. The present invention is provided with an axial flow fan body and a cleaning mechanism, and when the motor drives the main shaft to rotate, the first reciprocating screw is synchronously rotated, and the first piston plate is horizontally moved along the inner wall of the sealing block through the fixed connection between the limit plate, the first connecting rod and the first piston plate, so that the internal air pressure of the sealing block changes, thereby making the second piston plate move up and down, and the fixed connection between the second piston plate, the connecting column and the scraper makes the scraper move up and down in contact with the outer side of the filter screen, thereby scraping off the dust attached to the surface of the filter screen, and improving the air flow inside the axial flow fan housing.

Description

Technical Field

[0001] The invention relates to the field of air conditioning and refrigeration, and in particular to an axial flow fan for refrigeration and air conditioning. Background Art

[0002] Axial flow fans are widely used. They are fans in which the airflow direction is in the same direction as the axis of the fan blades. For example, electric fans and air conditioner outdoor fans are fans that operate in an axial flow manner. They are called "axial flow" because the gas flows parallel to the fan axis. Axial flow fans are usually used in situations where the flow requirements are higher and the pressure requirements are lower. Axial flow fans are fixed in position and move the air.

[0003] In the use of air conditioners, axial flow fans are also indispensable. Existing axial flow fans for air conditioners usually control the flow of air by rotating the motor to drive the inclination angle of the rotating blades. The speed and direction of the air flow are changed by changing the inclination angle of the fan, thereby achieving the purpose of cooling the indoor air.

[0004] In the prior art, the axial flow fan of the air conditioner is usually provided with a protective cover on the outside of the axial flow fan during use. The principle of the axial flow fan is to suck air from one end and then discharge it from the other end. In this process, dust in the air is easily attached to the rotating blades, thereby reducing the rotation speed of the rotating blades and the direction of air flow. In order to solve this problem, a protective cover is designed. However, the anti-slip cover itself does not have a cleaning device. After long-term use, a large amount of dust will also adhere to the surface of the protective mechanism, thereby blocking air from entering the device, affecting the efficiency of the device. Summary of the invention

[0005] Based on this, the object of the present invention is to provide an axial flow fan for refrigeration and air conditioning to solve the technical problems mentioned in the above background.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an axial flow fan for refrigeration and air conditioning, comprising an axial flow fan housing and an axial flow fan body, the axial flow fan body is arranged on the inner side of the axial flow fan housing, and the axial flow fan body comprises a motor, a main rotating shaft, a first reciprocating screw and fan blades, the motor is arranged on the inner side of the axial flow fan housing, and the main rotating shaft is arranged on both sides of the motor, the first reciprocating screw is arranged on the outer side of the main rotating shaft, and the fan blades are arranged on the outer side of the main rotating shaft near the air outlet, a sliding groove is arranged in the middle of the bottom of the axial flow fan housing, and sliding grooves are arranged on both sides of the bottom of the axial flow fan housing.

[0007] By adopting the above technical solution, the motor is started, so that the main shaft drives the first reciprocating screw to rotate, thereby ensuring dust removal inside the device. The rotation of the main shaft ensures that the fan blades are driven to rotate, thereby ensuring air flow inside the device.

[0008] The present invention is further configured such that a filter is provided at the end of the first reciprocating screw on the side close to the air inlet, and a cleaning mechanism is provided on the outside of the filter, the cleaning mechanism includes a first sliding plate, a first piston mechanism, a sealing block and a second piston mechanism, and the first sliding plate is arranged on the outside of the first reciprocating screw, the first piston mechanism is arranged on the upper and lower sides of the first sliding plate, and the sealing block is arranged on the side of the first piston mechanism close to the air outlet, and the second piston mechanism is arranged at the end of the sealing block.

[0009] By adopting the above technical solution, when the main shaft drives the first reciprocating screw to rotate, the first reciprocating screw and the reciprocating screw of the first sliding plate bracket ensure that the first sliding plate moves horizontally along the first reciprocating screw, thereby ensuring that the first piston mechanism is driven to move horizontally, and the first piston mechanism moves horizontally on the inner wall of the sealing block. Through the piston principle, it is ensured that the second piston mechanism is driven to move up and down on the inner side of the sealing block, ensuring that the surface of the filter is dusted.

[0010] The present invention is further configured such that the first piston mechanism includes a limit plate, a first connecting rod and a first piston plate, and the limit plate is arranged on the upper and lower sides of the first sliding plate, the first connecting rod is arranged on the side of the limit plate close to the air inlet, and the first piston plate is arranged on the inner side of the sealing block.

[0011] By adopting the above technical solution, the horizontal movement of the limit plate ensures that the first piston plate is driven by the first connecting rod to move horizontally inside the sealing block, thereby ensuring that the air pressure inside the sealing block is changed.

[0012] The present invention is further configured such that the second piston mechanism includes a second piston plate, a connecting column and a scraper, and the second piston plate is arranged on the inner side of the sealing block, the connecting column is arranged below the second piston plate, and the connecting column is arranged in an "L" shape, and the scraper is arranged at the end of the connecting column.

[0013] By adopting the above technical solution, when the first piston plate moves horizontally inside the sealing block, the air pressure inside the sealing block is changed, thereby ensuring that the second piston plate is driven to move up and down. When the second piston plate moves up and down, the "L"-shaped setting of the connecting column drives the scraper plate to move up and down, thereby ensuring that the dust attached to the surface of the filter is scraped off.

[0014] The present invention is further configured such that the sealing block is configured to be "L"-shaped, and the inner side of the sealing block is configured to be hollow, the first piston plate is configured to be on the inner side of the sealing block, and the first piston plate is tightly fitted to the inner wall of the sealing block and is in a sealed state, and the second piston plate is tightly fitted to the inner wall of the sealing block and is in a sealed state.

[0015] By adopting the above technical solution, the "L"-shaped setting of the sealing block ensures that the horizontal movement of the first piston plate causes the second piston plate to move up and down, and the inner side of the sealing block is set to be hollow. The inner side of the sealing block is set to be hollow, and the horizontal movement of the first piston plate ensures that the air pressure inside the sealing block is changed. The tight fit between the first piston plate and the sealing block and the sealed state ensures that the horizontal movement of the first piston plate changes the air pressure inside the sealing block, so that the second piston plate moves up and down along the inside of the sealing block, ensuring that the scraper is driven to move up and down in contact with the outside of the filter, ensuring that the dust attached to the surface of the filter is scraped off.

[0016] The present invention is further configured such that a transmission mechanism is provided at the end of the axial flow fan body near the air outlet, and the transmission mechanism includes a first gear, a second reciprocating screw, a second sliding plate and a second connecting rod, the first gear is provided at the end of the first reciprocating screw near the air outlet, and the second reciprocating screw is provided on the outside of the first gear, the second sliding plate is provided on the outside of the second reciprocating screw, and the second connecting rod is provided on the outside of the second sliding plate, and the second connecting rod is fixedly connected to the second sliding plate.

[0017] By adopting the above technical solution, the first gear drives the second reciprocating screw to rotate through the rotation of the main shaft. The screw principle between the second reciprocating screw and the second sliding plate ensures the horizontal movement of the second sliding plate along the bottom slide groove of the axial fan housing. The fixed connection between the second sliding plate and the second connecting rod ensures the horizontal movement of the second connecting rod.

[0018] The present invention is further configured such that the transmission mechanism also includes a transmission belt, a second gear, a third reciprocating screw, a third sliding plate and a third connecting rod, and the transmission belt is arranged on the outside of the first gear, the second gear is arranged on both sides of the inner wall of the transmission belt, and the third reciprocating screw is arranged on the outside of the second gear near the air outlet, the third sliding plate is arranged on the outside of the third reciprocating screw, and the first gear, the transmission belt and the second gear are meshed and linked, and the third connecting rod is arranged on the outside of the third sliding plate near the air outlet.

[0019] By adopting the above technical solution, through the rotation of the first gear and the meshing connection between the first gear, the transmission belt and the second gear, the second gear drives the third reciprocating screw to rotate, and through the screw principle between the third reciprocating screw and the third sliding plate, it is ensured that the third sliding plate moves horizontally along the sliding groove of the axial flow fan housing, and when the third sliding plate moves horizontally, it is ensured that the third sliding plate drives the third connecting rod to move horizontally.

[0020] The present invention is further configured such that the directions of the reciprocating grooves arranged on the outside of the second reciprocating screw are opposite to those of the third reciprocating screw, and the second sliding plate on the outside of the second reciprocating screw is connected to the groove on the inner wall of the axial flow fan housing by a groove, and the third sliding plate on the outside of the third reciprocating screw is connected to the groove on the inner wall of the axial flow fan housing by a groove.

[0021] By adopting the above technical scheme, the reciprocating grooves arranged on the outside of the second reciprocating screw and the third reciprocating screw are in opposite directions, thereby ensuring that when the main shaft drives the first gear to rotate, the second reciprocating screw and the third reciprocating screw rotate in the same direction, thereby ensuring that the second sliding plate and the third sliding plate move in opposite directions, and the second sliding plate is connected to the axial flow fan housing through the groove connection, thereby ensuring that the second sliding plate performs horizontal reciprocating movement through the reciprocating screw principle between the second reciprocating screw, and the third sliding plate is connected to the axial flow fan housing through the groove connection, thereby ensuring that the third sliding plate performs horizontal reciprocating movement through the reciprocating screw principle between the third reciprocating screw.

[0022] The present invention is further configured such that a protective mechanism is provided at the end of the second connecting rod and the third connecting rod, and the protective mechanism includes a through slot plate, a rotating shaft, a sealing plate and a cleaning block, the through slot plate is arranged at the end of the axial flow fan housing, and the inner side of the through slot plate is provided with through slots with equal spacing, the bottom of the through slot provided by the through slot plate is provided with an arc groove, and the top of the through slot provided by the through slot plate is provided with a limiting groove, the rotating shaft is arranged below the through slot of the through slot plate, and the sealing plate is arranged below the rotating shaft, and the cleaning block is arranged on the inner side of the sealing plate close to the axial flow fan housing.

[0023] By adopting the above technical solution and setting up a protective mechanism, it is ensured that the interior of the axial flow fan casing is waterproofed, and by the connection between the second connecting rod and the sealing plate, when the second connecting rod moves horizontally back and forth, it is ensured that the sealing plate rotates around the rotating shaft, thereby ensuring the closing and opening of the through-groove plate, and by the fixed connection between the sealing plate and the cleaning block, it is ensured that when the sealing plate rotates, the dust on the surface of the through-groove of the through-groove plate is scraped off.

[0024] In summary, the present invention mainly has the following beneficial effects:

[0025] 1. The present invention is provided with an axial flow fan main body and a cleaning mechanism. When the motor drives the main rotating shaft to rotate, the first reciprocating screw is synchronously rotated. Through the screw principle between the first reciprocating screw and the first sliding plate, the first sliding plate is horizontally moved along the bottom slide groove of the axial flow fan housing, thereby driving the limit plate to move horizontally. Through the fixed connection between the limit plate, the first connecting rod and the first piston plate, the first piston plate is horizontally moved along the inner wall of the sealing block. Through the close fit between the first piston plate and the inner wall of the sealing block and the sealing state between the first piston plate and the inner wall of the sealing block, the internal air pressure of the sealing block is changed, thereby causing the second piston plate to move up and down. The fixed connection between the second piston plate, the connecting column and the scraper makes the scraper fit the outer side of the filter and move up and down, thereby scraping off the dust attached to the surface of the filter, thereby improving the air flow inside the axial flow fan housing.

[0026] 2. The present invention is provided with an axial flow fan main body, a transmission mechanism and a protection mechanism. When the main shaft rotates, the first gear and the second gear rotate synchronously through the fixed connection between the main shaft and the first gear, and the meshing connection between the first gear, the transmission belt and the second gear. When the first gear drives the second gear to rotate, the second sliding plate moves horizontally through the screw principle between the second gear and the second sliding plate, and the slide connection between the second sliding plate and the slide groove at the bottom of the axial flow fan housing. The fixed connection between the second sliding plate and the second connecting rod enables the second connecting rod to push the sealing plate to rotate around the rotating shaft as the center, thereby opening and closing the through groove of the through groove plate, and multiple groups of sealing plates are indirectly opened and closed with the second sliding plate and the third sliding plate, ensuring that the inside of the axial flow fan housing is rainproof and the service life of the device is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the internal structure of the present invention;

[0028] Figure 2 It is a structural schematic diagram of the axial flow fan main body of the present invention;

[0029] Figure 3 It is a structural schematic diagram of the transmission mechanism of the present invention;

[0030] Figure 4 It is a structural schematic diagram of the connection mode between the transmission mechanism and the protection mechanism of the present invention;

[0031] Figure 5 It is a structural schematic diagram of the protection mechanism of the present invention;

[0032] Figure 6 It is a structural schematic diagram of the cleaning mechanism of the present invention;

[0033] Figure 7is a cross-sectional view of a sealing block of the present invention;

[0034] Figure 8 It is a structural schematic diagram of the connection mode between the first piston mechanism and the second piston mechanism of the present invention.

[0035] In the figure: 1, axial flow fan housing; 2, axial flow fan body; 201, motor; 202, main shaft; 203, first reciprocating screw; 204, fan blade; 3, filter; 4, cleaning mechanism; 401, first sliding plate; 402, first piston mechanism; 4021, limit plate; 4022, first connecting rod; 4023, first piston plate; 403, sealing block; 404, second piston mechanism; 4041, second Piston plate; 4042, connecting column; 4043, scraper; 5, transmission mechanism; 501, first gear; 502, second reciprocating screw; 503, second sliding plate; 504, transmission belt; 505, second gear; 506, third reciprocating screw; 507, third sliding plate; 508, second connecting rod; 6, protection mechanism; 601, through-slot plate; 602, rotating shaft; 603, sealing plate; 604, cleaning block. DETAILED DESCRIPTION

[0036] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0037] The following describes an embodiment of the present invention based on its overall structure.

[0038] Embodiment 1

[0039] An axial flow fan for refrigeration and air conditioning, such as Figure 1 , Figure 2 and Figure 3 As shown, it includes an axial flow fan casing 1 and an axial flow fan body 2. The axial flow fan body 2 is arranged on the inner side of the axial flow fan casing 1, and the axial flow fan body 2 includes a motor 201, a main shaft 202, a first reciprocating screw 203 and a fan blade 204. The motor 201 is arranged on the inner side of the axial flow fan casing 1, and the main shaft 202 is arranged on both sides of the motor 201. The first reciprocating screw 203 is arranged on the outer side of the main shaft 202. By starting the motor 201, the main shaft 202 drives the first reciprocating screw 203 to rotate, thereby ensuring dust removal inside the device, and the fan blade 204 is arranged on the outer side of the main shaft 202 near the air outlet. By rotating the main shaft 202, it is ensured that the fan blade 204 is driven to rotate, thereby ensuring air flow inside the device. A sliding groove is arranged in the middle of the bottom of the axial flow fan casing 1, and sliding grooves are arranged on both sides of the bottom of the axial flow fan casing 1.

[0040] See also Figure 1 , Figure 6 and Figure 7 A filter screen 3 is arranged at the end of the first reciprocating screw rod 203 on the air inlet side, and a cleaning mechanism 4 is arranged on the outside of the filter screen 3. The cleaning mechanism 4 includes a first sliding plate 401, a first piston mechanism 402, a sealing block 403 and a second piston mechanism 404. The first sliding plate 401 is arranged on the outside of the first reciprocating screw rod 203, and the first piston mechanism 402 is arranged on the upper and lower sides of the first sliding plate 401. When the main shaft 202 drives the first reciprocating screw rod 203 to rotate, the first reciprocating screw rod 203 and the first sliding plate 401 support the first reciprocating screw rod 203 to rotate. The reciprocating screw of the frame ensures that the first sliding plate 401 moves horizontally along the first reciprocating screw 203, thereby ensuring that the first piston mechanism 402 is driven to move horizontally, and the sealing block 403 is arranged on the side of the first piston mechanism 402 close to the air outlet, and the second piston mechanism 404 is arranged at the end of the sealing block 403. The first piston mechanism 402 moves horizontally on the inner wall of the sealing block 403. Through the piston principle, it is ensured that the second piston mechanism 404 is driven to move up and down on the inner side of the sealing block 403, ensuring that the dust on the surface of the filter 3 is removed.

[0041] See also Figure 1 , Figure 6 , Figure 7 and Figure 8 The first piston mechanism 402 includes a limit plate 4021, a first connecting rod 4022 and a first piston plate 4023, and the limit plate 4021 is arranged on the upper and lower sides of the first sliding plate 401, the first connecting rod 4022 is arranged on the side of the limit plate 4021 close to the air inlet, and the first piston plate 4023 is arranged on the inner side of the sealing block 403. Through the horizontal movement of the limit plate 4021, it is ensured that the first piston plate 4023 is driven by the first connecting rod 4022 to move horizontally on the inner side of the sealing block 403, thereby ensuring that the air pressure inside the sealing block 403 is changed.

[0042] See also Figure 1 , Figure 6 , Figure 7 and Figure 8The second piston mechanism 404 includes a second piston plate 4041, a connecting column 4042 and a scraper 4043, and the second piston plate 4041 is arranged on the inner side of the sealing block 403. When the first piston plate 4023 moves horizontally inside the sealing block 403, the air pressure inside the sealing block 403 is changed, thereby ensuring that the second piston plate 4041 is driven to move up and down. The connecting column 4042 is arranged below the second piston plate 4041, and the connecting column 4042 is arranged in an "L" shape, and the scraper 4043 is arranged at the end of the connecting column 4042. When the second piston plate 4041 moves up and down, the "L" shape setting of the connecting column 4042 drives the scraper 4043 to move up and down, thereby ensuring that the dust attached to the surface of the filter 3 is scraped off.

[0043] See also Figure 1 , Figure 7 and Figure 8 The sealing block 403 is set to be "L"-shaped. The "L"-shaped setting of the sealing block 403 ensures that the first piston plate 4023 moves horizontally so that the second piston plate 4041 moves up and down. The inner side of the sealing block 403 is set to be hollow. The inner side of the sealing block 403 is set to be hollow, and the horizontal movement of the first piston plate 4023 ensures that the air pressure inside the sealing block 403 is changed. The first piston plate 4023 is set on the inner side of the sealing block 403, and the first piston plate 4023 is tightly fitted with the inner wall of the sealing block 403. , and is in a sealed state, the second piston plate 4041 is tightly fitted with the inner wall of the sealing block 403, and is in a sealed state. The first piston plate 4023 is tightly fitted with the sealing block 403, and is in a sealed state, ensuring that the horizontal movement of the first piston plate 4023 changes the air pressure inside the sealing block 403, so that the second piston plate 4041 moves up and down along the inside of the sealing block 403, ensuring that the scraper plate 4043 is driven to move up and down in contact with the outer side of the filter screen 3, ensuring that the dust attached to the surface of the filter screen 3 is scraped off.

[0044] Embodiment 2

[0045] See also Figure 1 , Figure 3 and Figure 4, which is a second embodiment of the present invention, specifically a further description of the axial flow fan body, the end of the axial flow fan body 2 near the air outlet is provided with a transmission mechanism 5, and the transmission mechanism 5 includes a first gear 501, a second reciprocating screw rod 502, a second sliding plate 503 and a second connecting rod 508, the first gear 501 is provided at the end of the first reciprocating screw rod 203 near the air outlet, and the second reciprocating screw rod 502 is provided on the outside of the first gear 501, and the second sliding plate 503 is provided on the outside of the second reciprocating screw rod 502, through the main shaft 202 The rotation of the first gear 501 drives the second reciprocating screw 502 to rotate, and the screw principle between the second reciprocating screw 502 and the second sliding plate 503 ensures that the second sliding plate 503 moves horizontally along the bottom slide groove of the axial flow fan housing 1, and the second connecting rod 508 is arranged on the outer side of the second sliding plate 503, and the second connecting rod 508 is fixedly connected to the second sliding plate 503. The fixed connection between the second sliding plate 503 and the second connecting rod 508 ensures that the second connecting rod 508 is driven to move horizontally.

[0046] See also Figure 1 , Figure 3 and Figure 4 The transmission mechanism 5 also includes a transmission belt 504, a second gear 505, a third reciprocating screw rod 506, a third sliding plate 507 and a third connecting rod, and the transmission belt 504 is arranged on the outside of the first gear 501, the second gear 505 is arranged on both sides of the inner wall of the transmission belt 504, and the first gear 501, the transmission belt 504 and the second gear 505 are meshed and linked, and the third reciprocating screw rod 506 is arranged on the outside of the second gear 505 near the air outlet, and the third sliding plate 507 is arranged on the outside of the third reciprocating screw rod 506, through the first gear 5 01 rotates, and through the meshing connection between the first gear 501, the transmission belt 504 and the second gear 505, the second gear 505 drives the third reciprocating screw 506 to rotate, and through the screw principle between the third reciprocating screw 506 and the third sliding plate 507, it is ensured that the third sliding plate 507 moves horizontally along the sliding groove of the axial flow fan housing 1, and the third connecting rod is arranged on the outer side of the third sliding plate 507 near the air outlet. When the third sliding plate 507 moves horizontally, it is ensured that the third sliding plate 507 drives the third connecting rod to move horizontally.

[0047] See also Figure 3The reciprocating grooves arranged on the outer sides of the second reciprocating screw rod 502 and the third reciprocating screw rod 506 are arranged in opposite directions. The reciprocating grooves arranged on the outer sides of the second reciprocating screw rod 502 and the third reciprocating screw rod 506 are arranged in opposite directions, so that when the main shaft 202 drives the first gear 501 to rotate, the second reciprocating screw rod 502 and the third reciprocating screw rod 506 rotate in the same direction, so that the second sliding plate 503 and the third sliding plate 507 move in opposite directions, and the second sliding plate 503 on the outer side of the second reciprocating screw rod 502 and the inner wall groove of the axial flow fan housing 1 are moved in opposite directions. It is a slide groove connection, and the slide groove connection between the second sliding plate 503 and the axial flow fan housing 1 ensures that the second sliding plate 503 performs horizontal reciprocating movement through the reciprocating screw principle between the second reciprocating screw 502, and the third sliding plate 507 on the outside of the third reciprocating screw 506 is connected to the slide groove on the inner wall of the axial flow fan housing 1. The slide groove connection between the third sliding plate 507 and the axial flow fan housing 1 ensures that the third sliding plate 507 performs horizontal reciprocating movement through the reciprocating screw principle between the third reciprocating screw 506.

[0048] See also Figure 1 , Figure 4 and Figure 5 The ends of the second connecting rod 508 and the third connecting rod are provided with a protective mechanism 6, and the protective mechanism 6 includes a through-slot plate 601, a rotating shaft 602, a sealing plate 603 and a cleaning block 604, the through-slot plate 601 is provided at the end of the axial flow fan housing 1, and the inner side of the through-slot plate 601 is provided with through-slots at equal intervals, the bottom of the through-slot plate 601 is provided with an arc groove, and the top of the through-slot plate 601 is provided with a limiting groove, the rotating shaft 602 is provided below the through-slot plate 601, and the sealing plate 603 is provided at the rotating shaft 602. Below the shaft 602, through the connection between the second connecting rod 508 and the sealing plate 603, when the second connecting rod 508 moves back and forth horizontally, it is ensured that the sealing plate 603 rotates around the rotating shaft 602, thereby ensuring the closing and opening of the through-groove plate 601. The cleaning block 604 is arranged on the inner side of the sealing plate 603 close to the axial flow fan housing 1. Through the fixed connection between the sealing plate 603 and the cleaning block 604, it is ensured that when the sealing plate 603 rotates, the dust on the through-groove surface of the through-groove plate 601 is scraped off.

[0049] The working principle of the present invention is as follows: when the device is used, the motor 201 is first started, and the main shaft 202 is driven to rotate by the motor 201, and the fan blades 204 are rotated by the fixed connection between the main shaft 202 and the fan blades 204, thereby generating air flow, so that the airflow enters from the direction of the filter 3, and then is excluded from the device by the direction of the protective mechanism 6, and when the main shaft 202 rotates, the first gear 501 is fixedly connected with the first gear 501, and the meshing connection between the first gear 501, the transmission belt 504 and the second gear 505 is made to rotate synchronously, and when the first gear 501 drives the second reciprocating screw rod 502 to rotate, the second reciprocating screw rod 504 is driven by the second reciprocating screw rod 504. The screw principle between the rod 502 and the second sliding plate 503, and the second sliding plate 503 is connected to the sliding groove at the bottom of the axial fan housing 1, so that the second sliding plate 503 moves horizontally, and the fixed connection between the second sliding plate 503 and the second connecting rod 508 makes the second connecting rod 508 push the sealing plate 603 to rotate around the rotating shaft 602, so that the through groove of the through groove plate 601 is opened and closed, and the third reciprocating screw rod 506 is rotated through the synchronous rotation of the first gear 501 and the second gear 505, and the third reciprocating screw rod 506 and the third sliding plate 507 are horizontally moved through the screw principle between the third reciprocating screw rod 506 and the third sliding plate 507, and due to the second reciprocating screw rod 502 and the third reciprocating screw rod 508, the sealing plate 603 is rotated around the rotating shaft 602. The screw thread direction on the outside of the screw rod 506 is opposite, so that the second sliding plate 503 and the third sliding plate 507 move in opposite directions, ensuring that the interval second connecting rod 508 pushes the sealing plate 603 to be intermittently opened and closed, so that the second sliding plate 503 and the third sliding plate 507 are spaced apart by the second connecting rod 508 and the third connecting rod to push the sealing plate 603 to open, thereby controlling the air flow direction inside the axial flow fan housing 1, and when the sealing plate 603 rotates around the rotating shaft 602, the cleaning block 604 fits with the outer side of the through groove of the through groove plate 601, so that the dust on the surface of the through groove of the through groove plate 601 is removed, ensuring that the air flow in the through groove of the through groove plate 601 will not be blocked due to the accumulation of dust. The sealing plate 603 is opened at intervals, ensuring that the inside of the axial flow fan housing 1 is protected from rainwater, thereby increasing the service life of the device. When the motor 201 drives the main shaft 202 to rotate, the first reciprocating screw 203 rotates synchronously. Through the screw principle between the first reciprocating screw 203 and the first sliding plate 401, the first sliding plate 401 moves horizontally along the bottom slide groove of the axial flow fan housing 1, thereby driving the limit plate 4021 to move horizontally. Through the fixed connection between the limit plate 4021, the first connecting rod 4022 and the first piston plate 4023, the first piston plate 4023 moves horizontally along the inner wall of the sealing block 403. Through the close fit between the first piston plate 4023 and the inner wall of the sealing block 403,The sealing state between the first piston plate 4023 and the inner wall of the sealing block 403 causes the air pressure inside the sealing block 403 to change, thereby causing the second piston plate 4041 to move up and down. The fixed connection between the second piston plate 4041, the connecting column 4042 and the scraper 4043 causes the scraper 4043 to move up and down in contact with the outer side of the filter screen 3, thereby scraping off the dust attached to the surface of the filter screen 3, improving the air flow inside the axial flow fan housing 1, and thus completing the use process of the device.

[0050] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. An axial flow fan for refrigeration and air conditioning, comprising an axial flow fan housing (1) and an axial flow fan body (2), characterized in that: An axial flow fan body (2) is arranged on the inner side of the axial flow fan housing (1), and the axial flow fan body (2) comprises a motor (201), a main rotating shaft (202), a first reciprocating screw (203) and fan blades (204); the motor (201) is arranged on the inner side of the axial flow fan housing (1), and the main rotating shaft (202) is arranged on both sides of the motor (201); the first reciprocating screw (203) is arranged on the outer side of the main rotating shaft (202), and the fan blades (204) are arranged on the outer side of the main rotating shaft (202) near the air outlet; a sliding groove is arranged in the middle of the bottom of the axial flow fan housing (1), and sliding grooves are arranged on both sides of the bottom of the axial flow fan housing (1); and the end of the axial flow fan body (2) near the air outlet is arranged A transmission mechanism (5) is provided, and the transmission mechanism (5) comprises a first gear (501), a second reciprocating screw rod (502), a second sliding plate (503) and a second connecting rod (508), wherein the first gear (501) is arranged at the end of the main rotating shaft (202) close to the air outlet, and the second reciprocating screw rod (502) is arranged on the outside of the first gear (501), the second sliding plate (503) is arranged on the outside of the second reciprocating screw rod (502), and the second connecting rod (508) is arranged on the outside of the second sliding plate (503), and the second connecting rod (508) is fixedly connected to the second sliding plate (503), and the transmission mechanism (5) further comprises a transmission belt (504), a second gear (505), a third reciprocating screw rod (506), and a second connecting rod (508). The screw rod (506), the third sliding plate (507) and the third connecting rod are provided, and the transmission belt (504) is arranged on the outer side of the first gear (501), the second gear (505) is arranged on both sides of the inner wall of the transmission belt (504), and the third reciprocating screw rod (506) is arranged on the outer side of the second gear (505) close to the air outlet, the third sliding plate (507) is arranged on the outer side of the third reciprocating screw rod (506), and the first gear (501), the transmission belt (504) and the second gear (505) are meshed and linked, and the third connecting rod is arranged on the outer side of the third sliding plate (507) close to the air outlet, the second reciprocating screw rod (502) and the reciprocating groove arranged on the outer side of the third reciprocating screw rod (506) are in opposite directions, and the third The second sliding plate (503) on the outside of the second reciprocating screw (502) is connected to the sliding groove on the inner wall of the axial flow fan housing (1) by a sliding groove, and the third sliding plate (507) on the outside of the third reciprocating screw (506) is connected to the sliding groove on the inner wall of the axial flow fan housing (1) by a sliding groove. The ends of the second connecting rod (508) and the third connecting rod are provided with a protective mechanism (6), and the protective mechanism (6) includes a through-groove plate (601), a rotating shaft (602), a sealing plate (603) and a cleaning block (604). The through-groove plate (601) is arranged at the end of the axial flow fan housing (1), and the inner side of the through-groove plate (601) is provided with through-grooves with equal spacing, and the bottom of the through-groove provided on the through-groove plate (601) is provided with an arc groove.A limiting groove is provided at the top of the through groove of the through groove plate (601), the rotating shaft (602) is provided below the through groove of the through groove plate (601), and the sealing plate (603) is provided below the rotating shaft (602), and the cleaning block (604) is provided on the inner side of the sealing plate (603) close to the axial flow fan housing (1), and when the sealing plate (603) rotates around the rotating shaft (602), the cleaning block (604) fits against the outer side of the through groove of the through groove plate (601), so that dust on the surface of the through groove of the through groove plate (601) is removed.

2. The axial flow fan for refrigeration and air conditioning according to claim 1, characterized in that: A filter screen (3) is arranged at the end of the first reciprocating screw (203) on the side close to the air inlet, and a cleaning mechanism (4) is arranged on the outside of the filter screen (3), the cleaning mechanism (4) comprising a first sliding plate (401), a first piston mechanism (402), a sealing block (403) and a second piston mechanism (404), wherein the first sliding plate (401) is arranged on the outside of the first reciprocating screw (203), the first piston mechanism (402) is arranged on the upper and lower sides of the first sliding plate (401), the sealing block (403) is arranged on the side of the first piston mechanism (402) close to the air inlet, and the second piston mechanism (404) is arranged at the end of the sealing block (403).

3. The axial flow fan for refrigeration and air conditioning according to claim 2, characterized in that: The first piston mechanism (402) comprises a limit plate (4021), a first connecting rod (4022) and a first piston plate (4023), wherein the limit plate (4021) is arranged on the upper and lower sides of the first sliding plate (401), the first connecting rod (4022) is arranged on the side of the limit plate (4021) close to the air inlet, and the first piston plate (4023) is arranged on the inner side of the sealing block (403).

4. The axial flow fan for refrigeration and air conditioning according to claim 3, characterized in that: The second piston mechanism (404) comprises a second piston plate (4041), a connecting column (4042) and a scraper (4043), wherein the second piston plate (4041) is arranged on the inner side of the sealing block (403), the connecting column (4042) is arranged below the second piston plate (4041), the connecting column (4042) is arranged in an "L" shape, and the scraper (4043) is arranged at the end of the connecting column (4042).

5. The axial flow fan for refrigeration and air conditioning according to claim 4, characterized in that: The sealing block (403) is configured to be "L"-shaped, and the inner side of the sealing block (403) is configured to be hollow. The first piston plate (4023) is disposed on the inner side of the sealing block (403), and the first piston plate (4023) is tightly fitted to the inner wall of the sealing block (403) and is in a sealed state. The second piston plate (4041) is tightly fitted to the inner wall of the sealing block (403) and is in a sealed state.

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