Double-air-duct negative pressure fan capable of reducing air humidity

Abstract

The double-air-duct negative pressure fan comprises a fan body and a sealing cover plate, the sealing cover plate is installed on the outer side of the top of the fan body in a sealed mode through bolts, and the double-air-duct negative pressure fan further comprises an air inlet assembly and an air exhaust assembly which are installed on the two sides of the front end of the fan body in a slotted mode respectively. And an air inlet pipe and an air exhaust pipe are correspondingly arranged on the inner sides of the air inlet assembly and the air exhaust assembly respectively. The double-air-duct negative-pressure fan capable of reducing the air humidity is provided with a dehumidification disc, a single-rotation reciprocating lead screw is rotationally installed at the top of the interior of an air inlet cavity, then a movable base is connected to the outer side of the single-rotation reciprocating lead screw in a threaded and penetrating mode, and meanwhile the dehumidification disc is rotationally installed at the bottom of the movable base; when the air inlet assembly conveys outside air into a room through the air inlet cavity and the air inlet pipe, the dehumidifier conducts dehumidification work on air with the high humidity in the air inlet cavity through the dehumidification pipe, the sealing hose and the dehumidification disc, and it is avoided that humid air is directly conveyed into the room, and later exhaust use is affected.

Description

Technical Field

[0001] The invention relates to the technical field of negative pressure fans, and in particular to a double-air-duct negative pressure fan capable of reducing air humidity. Background Art

[0002] The double-duct negative pressure fan is an efficient and environmentally friendly ventilation device. It uses two ducts and negative pressure technology to achieve effective air circulation and ventilation. The double-duct design can make the air flow smoother and the ventilation effect better. By creating a negative pressure environment, the negative pressure fan can more effectively extract the indoor air and discharge it to the outside, while promoting the natural inflow of outdoor fresh air to achieve rapid renewal of indoor air. Because of the combination of double duct design and negative pressure technology, double duct negative pressure fans can perform well in ventilation and can quickly improve indoor air quality. Therefore, they are widely used in factory workshops, warehouses, laboratories, shopping centers and other occasions. When the double-duct negative pressure fan dredges the air, due to different working environments, when the double-duct negative pressure fan is used in factories and other occasions, because the traditional double-duct negative pressure fan is not equipped with a mechanism to reduce air humidity to assist the double-duct negative pressure fan in ventilation, the product quality will be reduced due to high humidity, reducing the ventilation efficiency of the double-duct negative pressure fan; In order to overcome the above defects, prior art 1 (application number CN201911332769.2, Chinese patent with application date of 2019-12-22) is a dual-duct ion blower, in which a U-shaped second air supply channel is arranged inside the second ventilation channel. When the first baffle is closed, the ion wind formed by the blower and the ion discharge mechanism enters the second air supply channel from the first air supply channel. The ion wind in the second air supply channel can be heated by the constant temperature circuit. The U-shaped constant temperature circuit increases the heating area of ​​the second air supply channel. At the same time, the U-shaped second air supply channel can effectively extend the heating time of the ion wind and ensure the temperature of the hot ion wind when it is blown out from the air supply hood; There is also prior art 2 (Chinese patent with publication number CN202011219780.0 and application date 2020-11-05). In a negative pressure fan that can automatically adjust temperature and humidity, a flow increase device is provided so that the flow of hot and humid air can be increased when the fan needs to perform a large amount of ventilation, thereby ensuring the stability of indoor temperature and humidity even when a large amount of ventilation is required; And prior art 3 (Chinese patent with publication number CN202110596666.8 and application date 2021-05-31) is a ring network cabinet with humidity monitoring and humidity control functions. Through the mutual coordination of the air inlet pipe, the negative pressure fan, the circulation pipe and the exhaust pipe, when the negative pressure fan is working, the hot air generated by the work inside can be sucked into the air inlet pipe and introduced into the circulation pipe. The circulation pipe is inserted into the interior of the cabinet, so that the hot air can circulate inside the cabinet. With the setting of the heat conductive layer, the heat can be exported to the surface of the cabinet, thereby effectively reducing the internal temperature. At the same time, it can also avoid the situation where condensation occurs on the outer wall of the cabinet and causes internal moisture; Although the existing technology can reduce the air humidity of the double-duct negative pressure fan to improve the working comfort of employees and improve the production quality of products, when the double-duct negative pressure fan is used for ventilation and dredging, a large amount of air volume needs to be discharged, which may generate a large amount of noise. Being in a high-noise environment for a long time may cause certain damage to the health of workers near the production line. Therefore, we propose a double-duct negative pressure fan that can reduce air humidity in order to solve the above-mentioned problems. Summary of the invention

[0003] The purpose of the present invention is to provide a double-duct negative pressure fan capable of reducing air humidity, so as to solve the problem raised by the above-mentioned background technology that when the double-duct negative pressure fan in the current market is used to circulate and clear the air, due to different working environments, when the double-duct negative pressure fan is used in factories and other occasions, because the traditional double-duct negative pressure fan is not equipped with a mechanism for reducing air humidity to assist the double-duct negative pressure fan in ventilation, the product quality will be reduced due to high humidity, thereby reducing the ventilation efficiency of the double-duct negative pressure fan.

[0004] To achieve the above object, the present invention provides the following technical solution: a double-duct negative pressure fan capable of reducing air humidity, comprising a body and a sealing cover plate, wherein the sealing cover plate is installed on the top outer side of the body by bolt sealing; It also includes: an air inlet assembly and an air exhaust assembly are respectively installed in grooves on both sides of the front end of the fuselage, wherein the air inlet assembly and the air exhaust assembly are symmetrically arranged about the vertical center line of the fuselage, and the inner sides of the air inlet assembly and the air exhaust assembly correspond to the air inlet pipe and the air exhaust pipe respectively; The air inlet pipe and the air exhaust pipe are respectively installed in a sealed manner through the two sides of the rear end of the fuselage, and a silencer pipe is installed in a sealed manner through the outer sides of the air inlet pipe and the exhaust pipe. The two silencer pipes have the same structure. A partition is installed in the middle of the fuselage in a sealed manner, and an air inlet cavity and an air exhaust cavity are formed on both sides of the partition, and the volumes of the air inlet cavity and the air exhaust cavity are the same; The right inner wall of the fuselage is grooved and penetrated with a movable seat for sliding installation, and a dehumidification disk is rotatably installed on the bottom of the movable seat, and the dehumidification disk is circular in shape, and the dehumidification disk is arranged on the inner side of the air inlet chamber, and a dehumidification pipe is sealably penetrated and installed on the right top groove of the sealing cover plate, and the bottom of the dehumidification pipe is seal-connected with a sealing hose, and the sealing hose seals and penetrates the movable seat to be connected with the dehumidification disk, and the top of the dehumidification pipe is seal-connected to an external dehumidifier.

[0005] Preferably, a rotating shaft is rotatably installed on the right side inside the fuselage, and a wind wheel is installed through the front end of the rotating shaft, and an air inlet assembly corresponds to the outer side of the wind wheel.

[0006] Preferably, a rotating gear is installed through the outer side of the rear end of the rotating shaft, and a transmission gear is meshedly connected to the outer side of the rotating gear, and a single-rotation reciprocating screw is installed through the inner side of the transmission gear.

[0007] Preferably, the single-rotation reciprocating screw is rotatably mounted inside the right side of the fuselage, and the outer side thread of the single-rotation reciprocating screw is penetrated and connected with a movable seat, and the diameter of the single-rotation reciprocating screw is smaller than the diameter of the rotating shaft.

[0008] Preferably, a third magnet is screwed onto the right end of the dehumidification disk, and the front and rear sides of the third magnet correspond to the first magnet and the second magnet respectively, and the first magnet and the second magnet are screwed onto the front and rear sides of the right end of the fuselage respectively.

[0009] Preferably, a filter plate is mounted on the left side of the fuselage by screws, an exhaust duct corresponds to the rear side of the filter plate, and a beating plate corresponds to the front side of the filter plate.

[0010] Preferably, a rotating rod is rotatably installed through the internal seal of the partition, and the right end of the rotating rod is meshedly connected with a single-rotation reciprocating screw through a bevel gear set, and a flapping plate is installed on the left end of the rotating rod through a screw.

[0011] Preferably, the outer sides of the two silencer pipes are both wound with heat exchange pipes, and the two heat exchange pipes have the same structure, and the outer ends of the two heat exchange pipes extend through and extend to the outer sides of both ends of the fuselage respectively.

[0012] Preferably, the outer sides of the air inlet duct and the air exhaust duct are both fitted with a circle of shock-absorbing airbags, and the two circles of shock-absorbing airbags are respectively arranged at equal angles on the outer sides of the air inlet duct and the air exhaust duct, and the outer sides of the two circles of shock-absorbing airbags are both fitted with sound insulation felts, and the outer sides of the two sound insulation felts are both fitted with the inner walls on both sides of the rear end of the fuselage.

[0013] Compared with the prior art, the present invention has the following beneficial effects: A dehumidification disk is provided, and a single-rotation reciprocating screw is rotatably installed on the top of the inner part of the air inlet cavity, and then a movable seat is connected through the outer thread of the single-rotation reciprocating screw, and a dehumidification disk is rotatably installed on the bottom of the movable seat. When the air inlet assembly transports the outside air to the room through the air inlet cavity and the air inlet pipe, the dehumidifier dehumidifies the air with high humidity in the air inlet cavity through the dehumidification pipe, the sealing hose and the dehumidification disk, so as to avoid the humid air being directly transported to the room and affecting the later exhaust use; Furthermore, a rotating shaft is rotatably installed inside the air inlet chamber, and a fan is installed through the front end of the rotating shaft. When the air inlet assembly transports the outside air into the room, the blown wind will drive the rotating shaft connected through the inside of the fan wheel to rotate. At this time, the rotating shaft will drive the rotating gear connected through the rear end thereof to drive the transmission gear to rotate. Subsequently, the transmission gear will also simultaneously drive the moving seat connected through the outer thread of the single-rotation reciprocating screw rod to reciprocate back and forth, thereby better driving the dehumidification disk to dehumidify the humid air in the air inlet chamber, thereby expanding the dehumidification range of the dehumidification disk, and realizing the reduction of air humidity. Furthermore, a third magnet is arranged at the outer end of the dehumidification disk, and a first magnet and a second magnet are arranged at the front and rear sides of the right end of the air inlet chamber respectively. When the single-rotation reciprocating screw drives the moving seat to move back and forth, the dehumidification disk will swing back and forth left and right based on the principle of magnetic field like charges repel and opposite charges attract, so as to better expand the dehumidification range of the dehumidification disk and improve practicality. A flapping plate is provided, and a rotating rod is installed by rotating through the internal groove of the partition plate, and then a rotating shaft is meshed and connected at the right end of the rotating rod through a bevel gear set, which can drive the flapping plate installed at the left end of the rotating rod to rotate while the rotating shaft rotates. Because the outer side of the flapping plate is closely connected to the filter plate, the filter plate can be reciprocatedly flapped and vibrated by the flapping plate to prevent impurities in the air from sticking to the surface of the filter plate and affecting the later exhaust ventilation use, and the operation is more time-saving and labor-saving; A silencer is provided. The silencer is installed through the inner sides of the air inlet pipe and the exhaust pipe. Since the two silencer pipes are made of mineral wool, the exhaust noise of the air inlet pipe and the exhaust pipe can be reduced by the two silencer pipes. Meanwhile, heat exchange pipes are closely wrapped and connected to the outer sides of the two silencer pipes. The acoustic principle can be used to convert noise energy into heat energy through the two heat exchange pipes, so that the two heat exchange pipes can realize heat energy conversion, which is more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the front three-dimensional structure of the fuselage of the present invention; Figure 2 It is a schematic diagram of the rear-view stereoscopic structure of the fuselage of the present invention; Figure 3It is a schematic diagram of the three-dimensional structure of the fuselage and the partition in a top view of the present invention; Figure 4 It is a schematic diagram of the fuselage top-section structure of the present invention; Figure 5 It is a schematic diagram of a partial top-sectional structure of the fuselage and the moving seat of the present invention; Figure 6 It is a schematic diagram of the partial three-dimensional structure of the fuselage and the moving seat of the present invention; Figure 7 It is a schematic diagram of the three-dimensional structure of the single-rotation reciprocating screw rod and the moving seat of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the muffler pipe and the heat exchange pipe of the present invention; Fig. 9 It is a schematic diagram of the partial main cross-section structure of the fuselage and the air inlet duct of the present invention; Fig.10 It is a schematic diagram of the three-dimensional structure of the beating plate and the filter plate of the present invention.

[0015] In the figure: 1. body; 2. sealing cover; 3. air inlet assembly; 4. exhaust assembly; 5. dehumidification pipe; 6. air inlet pipe; 7. exhaust pipe; 8. silencer; 9. heat exchange pipe; 10. partition; 11. rotating shaft; 12. wind wheel; 13. rotating gear; 14. transmission gear; 15. single-rotation reciprocating screw; 16. moving seat; 17. sealing hose; 18. dehumidification disc; 19. bevel gear set; 20. rotating rod; 21. flapping disc; 22. filter plate; 23. first magnet; 24. second magnet; 25. third magnet; 26. sound insulation felt; 27. shock-absorbing airbag; 28. air inlet chamber; 29. ​​exhaust chamber. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] The present invention provides the following technical solutions: Embodiment 1, in order to solve the problem that the existing double-duct negative pressure fan is not provided with a mechanism to reduce air humidity to assist the double-duct negative pressure fan in ventilation, which may lead to a decrease in product quality due to high humidity, the following is disclosed: The fuselage 1 and the sealing cover plate 2, wherein the sealing cover plate 2 is installed on the top outer side of the fuselage 1 by bolt sealing; The invention also includes: an air inlet assembly 3 and an air exhaust assembly 4 are respectively installed in grooves on both sides of the front end of the fuselage 1, wherein the air inlet assembly 3 and the air exhaust assembly 4 are symmetrically arranged about the vertical center line of the fuselage 1, and the inner sides of the air inlet assembly 3 and the air exhaust assembly 4 correspond to the air inlet pipe 6 and the air exhaust pipe 7 respectively; The air inlet pipe 6 and the air exhaust pipe 7 are respectively installed in a sealed manner through the rear ends of the fuselage 1. The outer sides of the air inlet pipe 6 and the air exhaust pipe 7 are sealed and installed with a muffler pipe 8 through them. The two muffler pipes 8 have the same structure. A partition plate 10 is installed in the middle of the fuselage 1. At the same time, an air inlet chamber 28 and an air exhaust chamber 29 are formed on both sides of the partition plate 10, and the volumes of the air inlet chamber 28 and the air exhaust chamber 29 are the same. The right inner wall of the fuselage 1 is grooved and penetrated, and a movable seat 16 is slidably installed, and a dehumidification disk 18 is rotatably installed at the bottom of the movable seat 16, and the dehumidification disk 18 is circular in shape, and the dehumidification disk 18 is arranged on the inner side of the air inlet chamber 28, and a dehumidification pipe 5 is installed through the groove on the top right side of the sealing cover plate 2, and the bottom of the dehumidification pipe 5 is sealed and connected to a sealing hose 17, and the sealing hose 17 seals and penetrates the movable seat 16 to be connected to the dehumidification disk 18, and the top of the dehumidification pipe 5 is sealed and connected to an external dehumidifier.

[0018] A rotating shaft 11 is rotatably installed on the right side of the fuselage 1, and a wind wheel 12 is installed through the front end of the rotating shaft 11, and the outside of the wind wheel 12 corresponds to the air inlet assembly 3, and a rotating gear 13 is installed through the outside of the rear end of the rotating shaft 11, and the outside of the rotating gear 13 is meshed with a transmission gear 14, and a single-rotation reciprocating screw 15 is installed through the inside of the transmission gear 14.

[0019] The single-rotation reciprocating screw 15 is rotatably mounted inside the right side of the fuselage 1, and the outer side thread of the single-rotation reciprocating screw 15 is penetrated and connected with the moving seat 16, the diameter of the single-rotation reciprocating screw 15 is smaller than the diameter of the rotating shaft 11, and the right end of the dehumidification plate 18 is screwed with a third magnet 25, and the front and rear sides of the third magnet 25 correspond to the first magnet 23 and the second magnet 24 respectively, and the first magnet 23 and the second magnet 24 are screwed on the front and rear sides of the right end of the fuselage 1 respectively; like Figure 1-Figure 7 As shown, when the air inlet assembly 3 delivers the moist air from the outside to the air inlet chamber 28, the wind force blown will drive the rotating shaft 11 connected to the inner side of the wind wheel 12 to rotate, and at this time, the rotating shaft 11 will simultaneously drive the transmission gear 14 meshingly connected to the outer side of the rotating gear 13 to rotate, and then the transmission gear 14 will also simultaneously drive the single-rotation reciprocating screw rod 15 connected to the inner side thereof to drive the moving seat 16 to reciprocate in the front and rear positions, and at this time, the external dehumidifier is started to dehumidify the moist gas inside the air inlet chamber 28 through the dehumidification pipe 5, the sealing hose 17 and the dehumidification disk 18, thereby reducing the air humidity, having better practicality, and improving the production quality of the product; When the dehumidification disk 18 performs the dehumidification work of reciprocating in the front and back positions, the dehumidification disk 18 will utilize the first magnet 23, the second magnet 24 and the third magnet 25 to swing back and forth in the left and right positions based on the principle that like charges repel and opposite charges attract in the magnetic field, thereby expanding the dehumidification range of the dehumidification disk 18, and quickly reducing the humidity of the air, which is more practical.

[0020] Embodiment 2 is different from Embodiment 1 in that, while the rotating shaft 11 is rotating, the beating plate 21 installed at the outer end of the rotating rod 20 can be driven to perform reciprocating beating and vibration on the filter plate 22, so as to prevent impurities in the air from adhering to the surface of the filter plate 22 and affecting the subsequent exhaust use, and has better practicality. A filter plate 22 is installed on the left side of the fuselage 1 by screws, and the rear side of the filter plate 22 corresponds to the exhaust pipe 7, and the front side of the filter plate 22 corresponds to the beating plate 21.

[0021] The internal seal of the partition 10 is rotatably installed with a rotating rod 20, and the right end of the rotating rod 20 is meshedly connected with a single-rotation reciprocating screw rod 15 through a bevel gear set 19, and the left end of the rotating rod 20 is installed with a flapping plate 21 through a screw.

[0022] like Figure 1-Figure 10 As shown, while the rotating shaft 11 rotates, the rotating shaft 11 will drive the flapping plate 21 installed on the outer end of the rotating rod 20 to rotate through the bevel gear set 19. Because the outer side of the flapping plate 21 is closely connected to the filter plate 22, the filter plate 22 can be reciprocated by the flapping plate 21 to prevent impurities in the air from sticking to the surface of the filter plate 22 and affecting the subsequent exhaust use. The operation is more time-saving and labor-saving, and there is no need for complicated steps such as manual cleaning.

[0023] Embodiment 3 is different from Embodiment 2 in that the air inlet pipe 6 and the air exhaust pipe 7 can be subjected to noise reduction and sound absorption treatment, thereby improving the comfort of using the double-duct negative pressure fan. The outer sides of the two silencer pipes 8 are both wound with heat exchange pipes 9 , and the two heat exchange pipes 9 have the same structure. The outer ends of the two heat exchange pipes 9 extend through and extend to the outer sides of both ends of the fuselage 1 .

[0024] The outer sides of the air inlet duct 6 and the air exhaust duct 7 are both fitted and connected with a circle of shock-absorbing airbags 27, and the two circles of shock-absorbing airbags 27 are respectively arranged at equal angles on the outer sides of the air inlet duct 6 and the air exhaust duct 7, and the outer sides of the two circles of shock-absorbing airbags 27 are both fitted and connected with sound insulation felts 26, and the outer sides of the two sound insulation felts 26 are both fitted and connected to the inner walls on both sides of the rear end of the fuselage 1.

[0025] like Figure 1-Figure 9As shown, when the air inlet pipe 6 and the exhaust pipe 7 take in and exhaust air, the silencer pipe 8 installed on the inner side thereof will reduce the exhaust noise of the air inlet pipe 6 and the exhaust pipe 7 by its own characteristics. At the same time, the outer sides of the air inlet pipe 6 and the exhaust pipe 7 are connected to the inner wall of the fuselage 1 through a circle of shock-absorbing airbags 27 and sound insulation felts 26, which can effectively reduce the propagation of wind volume noise, so as to reduce the noise generated by the use of the double-duct negative pressure fan; When the two silencer pipes 8 reduce the sound of the air inlet pipe 6 and the exhaust pipe 7, the two silencer pipes 8 can use the acoustic principle to convert the noise energy into heat energy. At this time, the heat exchange pipe 9 wrapped around the outside of the two silencer pipes 8 can use the heat generated by the two silencer pipes 8 for heat exchange, thereby improving the multifunctional performance of the dual-duct negative pressure fan and making it more practical, thereby completing a series of tasks.

[0026] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-duct negative pressure fan capable of reducing air humidity, comprising a body (1) and a sealing cover plate (2), wherein the sealing cover plate (2) is installed on the top outer side of the body (1) by means of bolts; It is characterized in that Also includes: An air inlet assembly (3) and an air exhaust assembly (4) are respectively installed in grooves on both sides of the front end of the fuselage (1), wherein the air inlet assembly (3) and the air exhaust assembly (4) are symmetrically arranged about the vertical center line of the fuselage (1), and an air inlet pipe (6) and an air exhaust pipe (7) are respectively provided on the inner sides of the air inlet assembly (3) and the air exhaust assembly (4); The air inlet pipe (6) and the air exhaust pipe (7) are respectively installed in a sealed manner through the rear ends of the fuselage (1) on both sides, and a silencer pipe (8) is installed in a sealed manner through the outer sides of the air inlet pipe (6) and the air exhaust pipe (7), and the two silencer pipes (8) have the same structure; A partition (10) is sealedly installed in the middle of the fuselage (1), and an air inlet chamber (28) and an air outlet chamber (29) are respectively formed on both sides of the partition (10), and the volumes of the air inlet chamber (28) and the air outlet chamber (29) are the same; The right inner wall of the body (1) is slotted and penetrated by a movable seat (16) for sliding installation, and a dehumidification plate (18) is rotatably installed at the bottom of the movable seat (16), and the dehumidification plate (18) is circular in shape, and the dehumidification plate (18) is arranged on the inner side of the air inlet chamber (28); The right side groove of the top of the sealing cover plate (2) is sealed and penetrated with a dehumidification pipe (5), and the bottom of the dehumidification pipe (5) is sealed and connected to a sealing hose (17), and the sealing hose (17) is sealed and penetrated through the movable seat (16) and connected to a dehumidification disk (18), and the top of the dehumidification pipe (5) is sealed and connected to an external dehumidifier.

2. A double-duct negative pressure fan capable of reducing air humidity according to claim 1, characterized in that: A rotating shaft (11) is rotatably mounted on the right side of the interior of the fuselage (1), and a wind wheel (12) is installed through the front end of the rotating shaft (11), and an air inlet assembly (3) is correspondingly disposed on the outer side of the wind wheel (12).

3. A double-duct negative pressure fan capable of reducing air humidity according to claim 2, characterized in that: A rotating gear (13) is installed through the outer side of the rear end of the rotating shaft (11), and a transmission gear (14) is meshedly connected to the outer side of the rotating gear (13), while a single-rotation reciprocating screw rod (15) is installed through the inner side of the transmission gear (14).

4. A double-duct negative pressure fan capable of reducing air humidity according to claim 3, characterized in that: The single-rotation reciprocating screw rod (15) is rotatably mounted inside the right side of the machine body (1), and the outer thread of the single-rotation reciprocating screw rod (15) is penetrated and connected with a movable seat (16), and the diameter of the single-rotation reciprocating screw rod (15) is smaller than the diameter of the rotating shaft (11).

5. The double-duct negative pressure fan capable of reducing air humidity according to claim 1, characterized in that: The right end of the dehumidification plate (18) is screwed with a third magnet (25), and the front and rear sides of the third magnet (25) correspond to the first magnet (23) and the second magnet (24), respectively. The first magnet (23) and the second magnet (24) are screwed with the front and rear sides of the right end of the body (1).

6. The double-duct negative pressure fan capable of reducing air humidity according to claim 1, characterized in that: A filter plate (22) is mounted on the left side of the machine body (1) by means of screws, an exhaust pipe (7) is corresponding to the rear side of the filter plate (22), and a beating plate (21) is corresponding to the front side of the filter plate (22).

7. A double-duct negative pressure fan capable of reducing air humidity according to claim 6, characterized in that: A rotating rod (20) is rotatably mounted through the internal seal of the partition (10), and the right end of the rotating rod (20) is meshedly connected to a single-rotation reciprocating screw rod (15) via a bevel gear set (19), and a beating plate (21) is mounted on the left end of the rotating rod (20) via a screw.

8. The double-duct negative pressure fan capable of reducing air humidity according to claim 1, characterized in that: The outer sides of the two silencer pipes (8) are both wound and connected with a heat exchange pipe (9), and the two heat exchange pipes (9) have the same structure, and the outer ends of the two heat exchange pipes (9) respectively extend through and extend to the outer sides of both ends of the fuselage (1).

9. The double-duct negative pressure fan capable of reducing air humidity according to claim 1, characterized in that: The outer sides of the air inlet pipe (6) and the air outlet pipe (7) are both fitted and connected with a circle of shock-absorbing airbags (27), and two circles of shock-absorbing airbags (27) are respectively arranged at equal angles on the outer sides of the air inlet pipe (6) and the air outlet pipe (7), and the outer sides of the two circles of shock-absorbing airbags (27) are both fitted and connected with sound insulation felts (26), and the outer sides of the two sound insulation felts (26) are both fitted and connected to the inner walls on both sides of the rear end of the fuselage (1).

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