Energy-saving high-temperature-resistant negative pressure fan

Abstract

The invention relates to an energy-saving high-temperature-resistant negative-pressure fan, which belongs to the technical field of household negative-pressure machines and comprises a cylindrical fan shell, a negative-pressure fan is rotatably arranged in the fan shell, and a first motor for driving the negative-pressure fan to rotate is arranged in the fan shell. A negative pressure fan is arranged in the fan shell, a rotary fan is rotationally arranged in the fan shell and located at the air outlet end of the negative pressure fan, a stator and a rotor are arranged in the fan shell, the stator is fixedly arranged on the inner wall of the fan shell, the rotor is rotationally arranged in the fan shell, the rectifying ring is electrically connected with the rotor, the energy storage battery is electrically connected with the rectifying ring, and the energy storage battery is electrically connected with the rectifying ring. A second motor used for driving the negative pressure fan to rotate is further arranged in the fan shell, the energy storage battery is electrically connected with the second motor, and the fan further comprises an adjusting device used for enabling the first motor or the second motor to drive the negative pressure fan to rotate so as to discharge indoor hot air. The negative pressure fan has the effect of reducing the electric energy consumed by using the negative pressure fan.

Description

Technical Field

[0001] The present application relates to the technical field of household negative pressure machines, and in particular to an energy-saving, high-temperature resistant negative pressure fan. Background Art

[0002] Negative pressure fans use the cooling principle of air convection and negative pressure ventilation. They naturally draw in fresh air from the opposite door or window of the installation location and quickly force the hot and stuffy air in the room to be discharged outdoors. They are widely used in indoor ventilation, exhaust, cooling, dust removal and other scenarios.

[0003] However, as a household negative pressure fan, the negative pressure fan needs to be started for a long time to allow indoor and outdoor air to circulate and cool the room. Therefore, the negative pressure fan consumes a lot of electricity when used for a long time. Summary of the Invention

[0004] In order to reduce the electric energy consumed by the negative pressure fan, the present application provides an energy-saving high-temperature resistant negative pressure fan.

[0005] The present application is implemented through the following technical solutions: an energy-saving, high-temperature-resistant negative pressure fan, comprising a fan housing, the fan housing being cylindrical, a negative pressure fan being rotatably disposed within the fan housing, the rotation axis of the negative pressure fan being coaxially disposed with the fan housing, a first motor being disposed within the fan housing for driving the negative pressure fan to rotate, the first motor being electrically connected to mains electricity; A rotary fan is rotatably provided in the fan housing and at the air outlet end of the negative pressure fan. The rotary fan is coaxial with the fan housing. A stator and a rotor are provided in the fan housing. The stator is fixedly provided on the inner wall of the fan housing. The rotor is rotatably provided in the fan housing. The rotor is coaxially provided on the rotary fan and located between the stators. The fan also includes a rectifying ring electrically connected to the rotor and an energy storage battery electrically connected to the energy storage battery. A second motor for driving the negative pressure fan to rotate is further provided in the fan housing, and the energy storage battery is electrically connected to the second motor; It also includes an adjustment device, which is used to enable the first motor or the second motor to drive the negative pressure fan to rotate and discharge the hot air in the room.

[0006] Furthermore, the adjustment device includes a first drive wheel, a second drive wheel and a synchronous belt. Two of the first drive wheel and the second drive wheel are respectively provided. The two first drive wheels are respectively provided on the mounting shaft of the negative pressure fan and are respectively located on both sides of the negative pressure fan. The two second drive wheels are both provided in the fan housing and are located directly below the first drive wheel. Two synchronous belts are provided and are respectively used to wind around the first drive wheel and the second drive wheel. The first motor is used to drive the second drive wheel to rotate, and the second motor is used to drive another second drive wheel to rotate. The adjustment device also includes an adjusting member, which is used to drive the first motor and the second motor to connect to the corresponding second drive wheels respectively.

[0007] Furthermore, the adjusting part includes a skateboard slidably arranged in the fan housing, the skateboard slides along the axial direction of the fan housing, the first motor and the second motor are respectively arranged on the skateboard, the output shafts of the first motor and the second motor are facing each other, and the two second drive wheels are located between the first motor and the second motor, and the adjusting part also includes an electromagnet arranged in the fan housing and a permanent magnet fixedly arranged at the end of the skateboard, the electromagnet pushes or pulls the permanent magnet to drive the skateboard to slide and drive the first motor and the second motor to connect with the corresponding second drive wheels respectively.

[0008] Furthermore, a mounting groove is provided on the mounting shaft of the second driving wheel, and the mounting groove faces the corresponding first motor and second motor. The notch of the mounting groove is polygonal, and the output shafts of the first motor and the second motor are both cylindrical. An adapter is also included, and the adapter is used to drive the second driving wheel to rotate after the output shafts of the first motor and the second motor are inserted into the mounting groove.

[0009] Furthermore, the adapter includes a connecting column arranged on the output shafts of the first motor and the second motor, the connecting column is made of rubber, the diameter of the connecting column is smaller than the width of the opening of the mounting groove, the connecting column is hollow, and the connecting column enters the mounting groove and abuts against the bottom of the mounting groove to compress the connecting column, causing the connecting column to deform and be clamped in the mounting groove.

[0010] Furthermore, a windward hood is provided in the fan housing, and the projection of the windward hood in the axial direction of the fan housing is disc-shaped. The windward hood is separated from the inner wall of the fan housing, and a ventilation hole is opened at the axis of the windward hood. The ventilation hole is coaxial with the rotary fan. The negative pressure fan draws hot air in the room toward the windward hood, and part of the hot air flows toward the rotary fan through the ventilation hole to drive the rotary fan to rotate, and the remaining hot air is discharged through the outer periphery of the windward hood.

[0011] Furthermore, the vertical cross-section of the windward cover is folded and M-shaped, and the concave direction of the windward cover is away from the negative pressure fan.

[0012] Furthermore, the adjustment part also includes a display light arranged on the energy storage battery and a light sensor arranged in the fan housing. When the display light is on, the energy storage battery is in a discharging state. When the display light is off, the energy storage battery is in a charging state. A controller is also provided in the fan housing. The light sensor is electrically connected to the controller. The light sensor is used to receive the light signal of the display light and transmit the light signal to the controller. The controller is electrically connected to the control switch of the electromagnet. After the light sensor receives the light signal of the display light, the controller sends a control signal to the control switch to put the control switch into an off state. The adjustment part also includes a driving part. When the control switch is off, the driving part drives the skateboard to drive the second motor to connect with the second drive wheel; after the display light is off, the light sensor cannot receive the signal, and the controller sends a control signal to the control switch to connect the control switch, so that the electromagnet absorbs the permanent magnet to drive the skateboard to slide and connect the first motor to the second drive wheel.

[0013] Furthermore, the driving member includes a spring arranged in the fan housing, one end of the spring is fixedly arranged on the slide, and the other end is fixedly arranged on the fan housing. The spring is located on the side away from the permanent magnet, and the spring is used to drive the slide to have a sliding movement tendency toward the electromagnet.

[0014] Furthermore, it also includes two push switches, both of which are arranged in the fan housing and located at both ends of the skateboard. The push switches are in a separated state from the end of the skateboard. The push switches are electrically connected to the first motor and the second motor that are obliquely opposite to each other. When the electromagnet pushes the skateboard to connect the first motor to the second drive wheel, the skateboard abuts the push switch to connect the first motor to the mains. After the electromagnet is powered off, the spring drives the skateboard to drive the second motor to connect to the second drive wheel. The skateboard abuts the push switch to electrically connect the second motor to the energy storage battery.

[0015] The technical solution of this application has at least the following advantages and beneficial effects: 1. When the negative pressure fan is performing indoor ventilation, the first motor is started, and the first motor drives the negative pressure fan to rotate. The negative pressure fan rotates to discharge the hot air in the room, and the fresh air outside is pressed into the room to cool the room. When the negative pressure fan is ventilating, the air flow in the fan casing drives the rotary fan to rotate. The rotary fan drives the hot air in the fan casing to be discharged for a second time, thereby reducing the possibility of hot air entering the room again. The rotary fan drives the air flow in the fan casing to cool the negative pressure fan, thereby extending the service life of the negative pressure fan and improving the high temperature resistance of the negative pressure fan. 2. When the rotary fan rotates, it drives the rotor to rotate. The rotation of the rotor cuts the magnetic flux lines of the stator and generates current. The current enters the energy storage battery and stores energy. Then, the adjustment device drives the second motor to connect with the negative pressure fan. The negative pressure fan is driven by the energy storage battery to perform ventilation. At this time, the first motor stops working, thereby reducing the power consumption of the first motor. When the energy storage battery is exhausted, the adjustment device disconnects the second motor from the negative pressure fan and connects it to the first motor. The first motor drives the negative pressure fan to rotate for ventilation while charging the energy storage battery, further reducing the power consumption of the negative pressure fan. At the same time, the rotary fan and the negative pressure fan are in a separated state, thereby reducing the extra power consumption of the first motor by the rotary fan, further reducing power consumption. 3. When the negative pressure fan rotates at a low speed, the sliding seat is moved out from the fixed seat, thereby reducing the number of effective fan blades on the central axis, thereby reducing the load on the central axis, and thus reducing the power consumed by the negative pressure fan; when the room needs to be cooled quickly, the sliding seat slides toward the fixed seat and is fixed on the fixed seat, thereby increasing the number of effective fan blades, thereby achieving rapid cooling of the room. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 This is a schematic diagram of the overall structure of an energy-saving, high-temperature-resistant negative pressure fan according to an embodiment of the present application; Figure 2 This is a cross-sectional view of a fan housing in an energy-saving, high-temperature-resistant negative pressure fan according to an embodiment of the present application; Figure 3 yes Figure 2 Side view of Figure 4 yes Figure 3 A magnified schematic diagram of part A; Figure 5 yes Figure 3 An enlarged schematic diagram of part B; Figure 6 This is a schematic structural diagram of a negative pressure fan in an energy-saving, high-temperature-resistant negative pressure blower according to an embodiment of the present application; Figure 7 This is a structural diagram of an adjustment device in an energy-saving, high-temperature-resistant negative pressure fan according to an embodiment of the present application; Figure 8This is a schematic structural diagram of a fan blade in an energy-saving, high-temperature-resistant negative pressure fan according to an embodiment of the present application; Figure 9 This is a structural diagram of a fixed seat and a sliding seat in an energy-saving, high-temperature-resistant negative pressure blower according to an embodiment of the present application; Figure 10 This is a cross-sectional view of a fixed seat and a sliding seat in an energy-saving, high-temperature-resistant negative pressure blower according to an embodiment of the present application; Figure 11 yes Figure 10 Enlarged schematic diagram of part C.

[0018] Explanation of reference numerals: 1. fan housing; 2. negative pressure fan; 3. first motor; 4. rotary fan; 5. stator; 6. rotor; 7. rectifier ring; 8. energy storage battery; 9. second motor; 10. Adjustment device; 101. First drive wheel; 102. Second drive wheel; 103. Synchronous belt; 104. Slide plate; 105. Electromagnet; 106. Permanent magnet; 107. Display light; 108. Light sensor; 109. Controller; 110. Spring; 112. Push switch; 11. Connecting slot; 12. Connecting notch; 13. Mounting slot; 14. Connecting column; 15. Windward cover; 16. Connecting rod; 17. Ventilation hole; 18. Center axis; 19. Mounting seat; 191. Fixed seat; 192. Sliding seat; 20. Fan blade; 21. Insert; 22. Slot; 23. Micro push rod; 24. Mounting bracket; 25. Ball; 26. Wedge block; 27. Fixing slot; 28. Snap-in slot; 29. Second spring; 30. Third spring. DETAILED DESCRIPTION

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0021] The following is further described in conjunction with specific embodiments. Figure 1 and Figure 2, the embodiment of the present application discloses an energy-saving high temperature resistant negative pressure fan. Figure 1 and Figure 2 The energy-saving high-temperature resistant negative pressure fan includes a fan casing 1, which is cylindrical. A negative pressure fan 2 is rotated in the fan casing 1. The rotation axis of the negative pressure fan 2 is coaxially arranged with the fan casing 1. A first motor 3 for driving the negative pressure fan 2 to rotate is arranged in the fan casing 1. The first motor 3 is electrically connected to the mains. When the negative pressure fan performs indoor ventilation, the first motor 3 is started, and the first motor 3 drives the negative pressure fan 2 to rotate. The negative pressure fan 2 rotates to discharge the hot air in the room, and the fresh air outside is pressed into the room to cool the room.

[0022] Reference Figure 2 、 Figure 3 and Figure 4 In order to reduce the power consumption of the negative pressure fan, a rotary fan 4 is rotatably provided in the fan housing 1 and at the air outlet end of the negative pressure fan 2. The rotary fan 4 is coaxial with the fan housing 1 and faces the negative pressure fan 2. A stator 5 and a rotor 6 are provided in the fan housing 1. The stator 5 is a permanent magnet and two are provided. The rotor 6 is a coil. The stator 5 is fixedly provided on the inner wall of the fan housing 1. The rotor 6 is rotatably provided in the fan housing 1. The rotor 6 is coaxially provided on the rotary fan 4 and located between the stators 5. The fan also includes a rectifying ring 7, which is electrically connected to the rotor 6. The fan also includes an energy storage battery 8, which is electrically connected to the energy storage battery 8. Reference Figure 2 、 Figure 3 and Figure 4 , a second motor 9 for driving the negative pressure fan 2 to rotate is further provided in the fan housing 1, and the energy storage battery 8 is electrically connected to the second motor 9; Reference Figure 2 、 Figure 3 and Figure 4 , also includes an adjustment device 10, which is used to enable the first motor 3 or the second motor 9 to drive the negative pressure fan 2 to rotate and discharge the hot air in the room.

[0023] When the rotary fan 4 rotates, it drives the rotor 6 to rotate. The rotation of the rotor 6 cuts the magnetic flux lines of the stator 5 and generates current. The current enters the energy storage battery 8 and stores energy. Subsequently, the second motor 9 is driven to connect with the negative pressure fan 2 through the adjustment device 10. The negative pressure fan 2 is driven by the energy storage battery 8 to perform ventilation operations. At this time, the first motor 3 stops working, thereby reducing the power consumed by the first motor 3. When the energy storage battery 8 is exhausted, the adjustment device 10 disconnects the second motor 9 from the negative pressure fan 2 and connects it to the first motor 3. The first motor 3 drives the negative pressure fan 2 to rotate for ventilation operations while charging the energy storage battery 8, further reducing the power consumed by the negative pressure fan; at the same time, the rotary fan 4 and the negative pressure fan 2 are in a separated state, thereby reducing the extra power consumed by the rotary fan 4 of the first motor 3, further reducing power consumption.

[0024] Reference Figure 3 and Figure 5 In the embodiment of the present application, the adjustment device 10 includes a first drive wheel 101, a second drive wheel 102 and a synchronous belt 103. The peripheral walls of the first drive wheel 101 and the second drive wheel 102 are both concave to form a connecting groove 11. There are two first drive wheels 101 and two second drive wheels 102. The two first drive wheels 101 are respectively arranged on the mounting shaft of the negative pressure fan 2 and are respectively located on both sides of the negative pressure fan 2. The two second drive wheels 102 are both arranged in the fan housing 1 and are located directly below the first drive wheel 101. Two synchronous belts 103 are provided and are used to wind around the first drive wheel 101 and the second drive wheel 102 respectively. The first motor 3 is used to The second drive wheel 102 is driven to rotate, and the second motor 9 is used to drive another second drive wheel 102 to rotate. The adjustment device 10 also includes an adjusting member, which is used to drive the first motor 3 and the second motor 9 to be connected to the corresponding second drive wheel 102 respectively; when the first motor 3 or the second motor 9 is started, the second drive wheel 102 is driven to rotate, and the rotation of the second drive wheel 102 drives the synchronous belt 103 to run, and the operation of the synchronous belt 103 drives the first drive wheel 101 to rotate, and the rotation of the first drive wheel 101 drives the negative pressure fan 2 to rotate; under the action of the adjusting member, it is convenient to replace the first motor 3 or the second motor 9 and connect it to the corresponding second drive wheel 102.

[0025] Combine Figure 6In the embodiment of the present application, the adjusting member includes a skateboard 104 slidably arranged in the fan housing 1, the skateboard 104 is located at the bottom of the fan housing 1, and the skateboard 104 slides along the axial direction of the fan housing 1. The first motor 3 and the second motor 9 are respectively arranged on the skateboard 104, the output shafts of the first motor 3 and the second motor 9 are facing each other, and the two second drive wheels 102 are located between the first motor 3 and the second motor 9. Furthermore, a connecting notch 12 is opened in the middle of the skateboard 104, and the two second drive wheels 102 are both surrounded by the connecting notch 12. The adjusting member also includes a first electromagnet 105 arranged in the fan housing 1 and a permanent magnet 106 fixedly arranged at the end of the skateboard 104. The first electromagnet 105 pushes or pulls the permanent magnet 106 to drive the skateboard 104 to slide and drive the first motor 3 and the second motor 9 to connect with the corresponding second drive wheels 102 respectively.

[0026] When the first electromagnet 105 is energized, the first electromagnet 105 generates a magnetic field and acts on the permanent magnet 106. Under the action of the repulsive force, the slide 104 slides in the direction away from the first electromagnet 105. The sliding of the slide 104 drives the first motor 3 to move toward the corresponding second drive wheel 102 to connect, and the second motor 9 moves in the direction away from the second drive wheel 102 to separate, thereby completing the conversion between the first motor 3 and the second motor 9. The operation is simple and convenient.

[0027] Reference Figure 3 and Figure 5 In order to facilitate the connection between the first motor 3 and the second motor 9 and the corresponding second drive wheel 102, a mounting groove 13 is opened on the mounting shaft of the second drive wheel 102. The mounting groove 13 faces the corresponding first motor 3 and the second motor 9. The notch of the mounting groove 13 is polygonal. The output shafts of the first motor 3 and the second motor 9 are both cylindrical. An adapter is also included. The adapter is used to drive the second drive wheel 102 to rotate after the output shafts of the first motor 3 and the second motor 9 are inserted into the mounting groove 13; Reference Figure 3 and Figure 5 The adapter includes a connecting column 14 arranged on the output shaft of the first motor 3 and the second motor 9. The connecting column 14 is made of rubber. The diameter of the connecting column 14 is smaller than the opening width of the mounting groove 13. The connecting column 14 is hollow. The connecting column 14 enters the mounting groove 13 and abuts against the bottom of the mounting groove 13 to compress the connecting column 14, causing the connecting column 14 to deform and be snapped into the mounting groove 13.

[0028] When the first motor 3 and the second motor 9 are connected to the corresponding second drive wheel 102, the connecting column 14 moves toward the mounting groove 13 and is inserted into the mounting groove 13. After the connecting column 14 abuts the bottom wall of the mounting groove 13, the connecting column 14 is deformed and clamped at the corner of the mounting groove 13, thereby completing the connection between the first motor 3 and the second motor 9 and the second drive wheel 102; at the same time, because the diameter of the connecting column 14 is smaller than the width of the mounting groove 13, it is convenient for the negative pressure fan 2 to rotate due to inertia, and the connecting column 14 is inserted into the mounting groove 13 to complete the connection.

[0029] Reference Figure 2 and Figure 3 In order to facilitate the air in the fan housing 1 to drive the rotary fan 4 to rotate and discharge the hot air in the fan housing 1, a windward cover 15 is provided in the fan housing 1. The projection of the windward cover 15 in the axial direction of the fan housing 1 is disc-shaped. The windward cover 15 is separated from the inner wall of the fan housing 1. In the embodiment of the present application, a connecting rod 16 is provided between the induced draft cover and the fan housing 1. A plurality of connecting rods 16 are provided and are evenly arranged along the circumference of the induced draft cover. A ventilation hole 17 is opened at the axis of the windward cover 15. The ventilation hole 17 is coaxial with the rotary fan 4. The negative pressure fan 2 draws the hot air in the room toward the windward cover 15. Part of the hot air flows toward the rotary fan 4 through the ventilation holes 17 to drive the rotary fan 4 to rotate, and the remaining hot air is discharged through the outer periphery of the windward cover 15. Reference Figure 2 and Figure 3 Furthermore, the vertical cross-section of the windward cover 15 is folded and M-shaped, and the concave direction of the windward cover 15 is away from the negative pressure fan 2.

[0030] When the negative pressure fan 2 discharges the indoor hot air, the hot air flows toward the induced draft hood, and the hot air at the axis is discharged through the ventilation hole 17. When the hot air hits the turning point of the induced draft hood, part of the hot air flows along the corner into the through hole, and the rest flows from the outer edge of the induced draft hood and is discharged. In the above process, the flow rate of the hot air through the ventilation hole 17 is increased, which makes it easier to drive the rotary fan 4 to rotate and facilitates the charging operation of the energy storage battery 8.

[0031] Reference Figure 3 In the embodiment of the present application, the adjustment member further includes a display light 107 provided on the energy storage battery 8 and a light sensor 108 provided in the fan housing 1. When the display light 107 is on, the energy storage battery 8 is in a discharging state. When the display light 107 is off, the energy storage battery 8 is in a charging state. Reference Figure 2 and Figure 3A controller 109 is further provided in the fan housing 1. A light sensor 108 is electrically connected to the controller 109. The light sensor 108 is directly opposite the display light 107. The light sensor 108 is used to receive the light signal of the display light 107 and transmit the light signal to the controller 109. The controller 109 is electrically connected to the control switch of the first electromagnet 105. After the light sensor 108 receives the light signal of the display light 107, the controller 109 sends a control signal to the control switch to turn the control switch off. The fan housing 1 also includes a driving member. The driving member is used to drive the slide plate 104 to drive the second motor 9 to connect to the second drive wheel 102 when the control switch is turned off. After the display light 107 goes out, the light sensor 108 cannot receive signals, and the controller 109 sends a control signal to the control switch to connect the control switch, so that the first electromagnet 105 attracts the permanent magnet to drive the slide 104 to slide, thereby connecting the first motor 3 to the second drive wheel 102; Combine Figure 6 The driving member includes a first spring 110 arranged in the fan housing 1, one end of the first spring 110 is fixedly set on the slide 104, and the other end is fixedly set on the fan housing 1. The first spring 110 is located on the side away from the permanent magnet. The first spring 110 is used to drive the slide 104 to have a sliding movement tendency toward the first electromagnet 105.

[0032] When the energy storage battery 8 is charged due to the drive of the negative pressure fan 2, the display light 107 goes out. At this time, the controller 109 sends a control signal to the control switch of the first electromagnet 105. The control switch is turned on to connect the first electromagnet 105 to the mains. At this time, the first electromagnet 105 generates a repulsive force on the permanent magnet 106 and pushes the slide 104 to slide. The slide 104 moves away from the first electromagnet 105. During this process, the first spring 110 is in a compressed state. At the same time, the slide 104 drives the output shaft of the first motor 3 to be inserted into the mounting slot 13. The first motor 3 starts and drives the second drive wheel 102 to rotate, driving the negative pressure fan 2. The high-pressure fan 2 rotates, and the negative-pressure fan 2 drives the air flow and blows the rotary fan 4 to rotate; when the energy storage battery 8 completes energy storage, the display light 107 lights up. At this time, the light sensor 108 receives the signal and transmits the signal to the controller 109. The controller 109 receives the signal and transmits it to the control switch of the first electromagnet 105. The control switch is disconnected, and the first electromagnet 105 fails. At this time, the first spring 110 recovers its deformation and pushes the slide plate 104 to slide. The slide plate 104 slides and drives the second motor 9 to be plugged into the installation slot 13. At this time, the second motor 9 drives the second drive wheel 102 to rotate and drives the negative-pressure fan 2 to rotate.

[0033] Reference Figure 6 and Figure 7In order to facilitate the start and stop of the first motor 3 and the second motor 9, two push switches 112 are also included. The two push switches 112 are both arranged in the fan housing 1 and are located at both ends of the slide 104. The push switches 112 are in a separated state from the ends of the slide 104. The push switches 112 are electrically connected to the first motor 3 and the second motor 9 that are obliquely opposite to each other. When the first electromagnet 105 pushes the slide 104 to connect the first motor 3 with the second drive wheel 102, the slide 104 abuts the push switches 112 to electrically connect the first motor 3 to the mains. After the first electromagnet 105 is powered off, the first spring 110 drives the slide 104 to drive the second motor 9 to connect with the second drive wheel 102. The slide 104 abuts the push switches 112 to electrically connect the second motor 9 to the energy storage battery 8.

[0034] Reference Figure 8 and Figure 9 When the negative pressure fan 2 has been ventilating the room for a long time and the indoor temperature and air freshness reach a certain range, the negative pressure fan 2 needs to continue to work to maintain the exchange of air. At this time, the speed can be appropriately reduced. When the speed is reduced, the power consumption can be reduced. Therefore, in order to further reduce the power consumption of the negative pressure fan 2 at a low speed, in the embodiment of the present application, a mounting seat 19 is provided on the central axis 18 of the negative pressure fan 2, and the fan blades 20 of the negative pressure fan 2 are fixedly provided on the mounting seat 19. The mounting seat 19 includes a fixing seat 191 and Sliding seat 192, there are two sliding seats 192 and they are located on both sides of the fixed seat 191, the fan blades 20 are fixedly set on the fixed seat 191 and the sliding seat 192, the fixed seat 191 is fixedly set on the central axis 18, the sliding seat 192 rotates and slides on the central axis 18, the sliding seat 192 rotates around the central axis 18, and the sliding seat 192 slides along the length direction of the central axis 18, the sliding seat 192 is annular and is provided with an insert 21 in the direction of the fixed seat 191, the fan blades 20 are fixedly set on the insert 21, and a slot 22 for the insert 21 to be inserted is opened on the fixed seat 191. When the insert 21 is inserted into the slot 22, the fan blades 20 on the fixed seat 191 and the sliding seat 192 are located in the same plane.

[0035] When the negative pressure fan 2 rotates at a low speed, in order to further reduce the electric energy consumed by the negative pressure fan 2, the sliding seat 192 is moved out from the fixed seat 191, thereby reducing the load on the central shaft 18, thereby reducing the electric energy consumed by the negative pressure fan 2; when the indoor temperature needs to be cooled quickly, the sliding seat 192 slides toward the fixed seat 191 and is fixed on the fixed seat 191, thereby increasing the number of effective fan blades 20, thereby achieving rapid cooling of the indoor temperature.

[0036] Reference Figure 8 and Figure 9Furthermore, a first strong magnet is provided at the bottom of the slot 22, and a second strong magnet is provided on the bottom surface of the insert 21; when the sliding seat 192 approaches the fixed seat 191 and the number of fan blades 20 is increased, the second strong magnet is adsorbed on the first strong magnet, thereby fixing the sliding seat 192 and the fixed seat 191.

[0037] Reference Figure 10 and Figure 11 Furthermore, a micro push rod 23 is provided on the mounting bracket 24 of the negative pressure fan 2, and the output shaft of the micro push rod 23 is perpendicular to the sliding seat 192 and faces the sliding seat 192. A ball 25 is provided at the end of the output shaft of the micro push rod 23, and the ball 25 is slidably provided on the output shaft of the micro push rod 23 and slides along the length direction of the output shaft; further, a wedge block 26 is slidably provided on the output shaft of the micro push rod 23, and the sliding direction of the wedge block 26 is perpendicular to the output shaft of the micro push rod 23, and the inclined surface of the wedge block 26 abuts against the ball 25; the sliding seat 192 is opened on the surface facing the output shaft of the electric push rod There is a fixing groove 27 and the inner wall of the fixing groove 27 is provided with a clamping groove 28 for the wedge block 26 to clamp; when the output shaft of the micro push rod 23 moves toward the sliding seat 192 and enters the clamping groove 28, the ball 25 abuts against the bottom wall of the clamping groove 28 and drives the wedge block 26 into the clamping groove 28, thereby connecting the micro push rod 23 and the sliding seat 192, and then the sliding seat 192 and the fixed seat 191 are installed or removed; and the sliding seat is fixed to the sliding seat or removed from the fixed seat by the micro push rod, which reduces the high-altitude work of the installers and facilitates the adjustment of the position of the sliding seat.

[0038] Reference Figure 10 and Figure 11 Furthermore, a second spring 29 and a third spring 30 are provided in the output shaft of the micro push rod 23. The second spring 29 is used to drive the ball 25 to have a movement tendency toward the outside of the output shaft, and the third spring 30 drives the wedge to have a sliding tendency toward the inside of the output shaft; when the ball 25 is separated from the bottom wall of the fixing groove 27, the third spring 30 pulls the wedge block 26 into the output shaft to facilitate the separation of the micro push rod 23 from the sliding seat 192.

[0039] The implementation principle of an energy-saving high-temperature resistant negative pressure blower in the embodiment of the present application is as follows: When the negative pressure fan is performing indoor ventilation, the first motor 3 is started, which drives the negative pressure fan 2 to rotate. The negative pressure fan 2 rotates to expel the hot air in the room, and the fresh air outside is pressed into the room, thereby cooling the room. When the exhausted hot air passes through the induced draft hood, the hot air drives the rotary fan 4 to rotate, driving the rotor 6 to rotate. The rotation of the rotor 6 cuts the magnetic flux lines of the stator 5 and generates current. The current enters the energy storage battery 8 to store energy. At this time, the indicator light 107 on the energy storage battery 8 is off. The display light 107 goes out. At this time, the controller 109 sends a control signal to the control switch of the first electromagnet 105. The control switch is turned on, and the first electromagnet 105 is electrically connected to the mains. At this time, the first electromagnet 105 generates a repulsive force on the permanent magnet 106, pushing the slide 104 to slide. The slide 104 moves away from the first electromagnet 105. During this process, the first spring 110 is in a compressed state. At the same time, the slide 104 drives the output shaft of the first motor 3 to be inserted into the mounting groove 13. At this time, the slide 104 abuts the press switch 112, connecting the first motor 3 to the mains. The first motor 3 is started and drives the second drive wheel 102 to rotate, thereby driving the negative pressure fan 2 to rotate. The negative pressure fan 2 drives air flow and blows the rotary fan 4 to rotate. When the energy storage battery 8 has completed energy storage, the indicator light 107 lights up. At this time, the light sensor 108 receives the signal and transmits the signal to the controller 109. The controller 109 receives the signal and transmits the signal to the control switch of the first electromagnet 105. The control switch is turned off, and the first electromagnet 105 fails. At this time, the first spring 110 recovers its deformation and pushes the slide plate 104 to slide. The slide plate 104 slides and drives the second motor 9 to be inserted into the installation slot 13. At the same time, the slide plate 104 abuts the press switch 112, thereby electrically connecting the second motor 9 to the energy storage battery 8. The second motor 9 drives the second drive wheel 102 to rotate, thereby driving the negative pressure fan 2 to rotate. In the above process, the switching use of the first motor 3 and the second motor 9 reduces the use time of the first motor 3, thereby reducing the consumption of electric energy.

[0040] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. An energy-saving, high-temperature-resistant negative pressure fan, characterized by: The invention comprises a fan housing (1), wherein the fan housing (1) is cylindrical, a negative pressure fan (2) is rotatably arranged in the fan housing (1), the rotation axis of the negative pressure fan (2) is coaxially arranged with the fan housing (1), and a first motor (3) for driving the negative pressure fan (2) to rotate is arranged in the fan housing (1), and the first motor (3) is electrically connected to the mains electricity; A rotary fan (4) is rotatably provided in the fan housing (1) and at the air outlet end of the negative pressure fan (2), the rotary fan (4) being coaxial with the fan housing (1), a stator (5) and a rotor (6) being provided in the fan housing (1), the stator (5) being fixedly provided on the inner wall of the fan housing (1), the rotor (6) being rotatably provided in the fan housing (1), the rotor (6) being coaxially provided on the rotary fan (4) and being located between the stator (5), and further comprising a rectifying ring (7), the rectifying ring (7) being electrically connected to the rotor (6), and an energy storage battery (8), the rectifying ring (7) being electrically connected to the energy storage battery (8); A second motor (9) for driving the negative pressure fan (2) to rotate is also provided in the fan housing (1), and the energy storage battery (8) is electrically connected to the second motor (9); It also includes an adjustment device (10), which is used to enable the first motor (3) or the second motor (9) to drive the negative pressure fan (2) to rotate and discharge the hot air in the room.

2. The energy-saving high-temperature resistant negative pressure fan according to claim 1, characterized in that: The adjustment device (10) comprises a first drive wheel (101), a second drive wheel (102) and a synchronous belt (103), wherein two first drive wheels (101) and two second drive wheels (102) are provided, and the two first drive wheels (101) are respectively provided on the mounting shaft of the negative pressure fan (2) and are respectively located on both sides of the negative pressure fan (2), and the two second drive wheels (102) are both provided in the fan housing (1) and are located directly below the first drive wheel (101), and the synchronous belt (103) is provided with two and is respectively used to wind around the first drive wheel (101) and the second drive wheel (102), the first motor (3) is used to drive the second drive wheel (102) to rotate, and the second motor (9) is used to drive the other second drive wheel (102) to rotate, and the adjustment device (10) further comprises an adjustment member, and the adjustment member is used to drive the first motor (3) and the second motor (9) to connect to the corresponding second drive wheel (102) respectively.

3. The energy-saving high-temperature resistant negative pressure fan according to claim 2, characterized in that: The adjusting member comprises a slide plate (104) slidably arranged in the fan housing (1), the slide plate (104) slides along the axial direction of the fan housing (1), the first motor (3) and the second motor (9) are respectively arranged on the slide plate (104), the output shafts of the first motor (3) and the second motor (9) are directly opposite, and the two second drive wheels (102) are located between the first motor (3) and the second motor (9), and the adjusting member further comprises an electromagnet (105) arranged in the fan housing (1) and a permanent magnet (106) fixedly arranged at the end of the slide plate (104), the electromagnet (105) pushes or pulls the permanent magnet (106) to drive the slide plate (104) to slide, thereby driving the first motor (3) and the second motor (9) to be connected to the corresponding second drive wheels (102) respectively.

4. The energy-saving high-temperature resistant negative pressure fan according to claim 3, characterized in that: A mounting groove (13) is provided on the mounting shaft of the second driving wheel (102), the mounting groove (13) faces the corresponding first motor (3) and second motor (9), the notch of the mounting groove (13) is polygonal, the output shafts of the first motor (3) and the second motor (9) are both cylindrical, and an adapter is also included. The adapter is used to drive the second driving wheel (102) to rotate after the output shafts of the first motor (3) and the second motor (9) are inserted into the mounting groove (13).

5. The energy-saving high-temperature resistant negative pressure fan according to claim 4, characterized in that: The adapter comprises a connecting column (14) arranged on the output shafts of the first motor (3) and the second motor (9), the connecting column (14) being made of rubber, the diameter of the connecting column (14) being smaller than the opening width of the mounting groove (13), the connecting column (14) being hollow, and the connecting column (14) entering the mounting groove (13) and abutting against the bottom of the mounting groove (13) to compress the connecting column (14), causing the connecting column (14) to deform and be clamped in the mounting groove (13).

6. The energy-saving high-temperature resistant negative pressure fan according to claim 1, characterized in that: A windward cover (15) is provided in the fan housing (1). The projection of the windward cover (15) in the axial direction of the fan housing (1) is disc-shaped. The windward cover (15) is separated from the inner wall of the fan housing (1). A ventilation hole (17) is provided at the axis of the windward cover (15). The ventilation hole (17) is coaxial with the rotary fan (4). The negative pressure fan (2) draws hot air from the room toward the windward cover (15). Part of the hot air flows toward the rotary fan (4) through the ventilation hole (17) to drive the rotary fan (4) to rotate, and the remaining hot air is discharged from the periphery of the windward cover (15).

7. The energy-saving high-temperature resistant negative pressure blower according to claim 6, characterized in that: The vertical cross-section of the windward cover (15) is folded and M-shaped, and the concave direction of the windward cover (15) faces away from the negative pressure fan (2).

8. The energy-saving high-temperature resistant negative pressure fan according to claim 3, characterized in that: The adjusting member further comprises a display light (107) arranged on the energy storage battery (8) and a light sensor (108) arranged in the fan housing (1); when the display light (107) is on, the energy storage battery (8) is in a discharging state; when the display light (107) is off, the energy storage battery (8) is in a charging state; a controller (109) is further arranged in the fan housing (1); the light sensor (108) is electrically connected to the controller (109); the light sensor (108) is used to receive a light signal from the display light (107) and transmit the light signal to the controller (109); the controller (109) is electrically connected to a control switch of the electromagnet (105) After the light sensor (108) receives the light signal of the display light (107), the controller (109) sends a control signal to the control switch to put the control switch into an off state. The invention also includes a driving member, which is used to drive the slide plate (104) to drive the second motor (9) to connect with the second drive wheel (102) when the control switch is off; after the display light (107) is off, the light sensor (108) cannot receive the signal, and the controller (109) sends a control signal to the control switch to connect the control switch, so that the electromagnet (105) attracts the permanent magnet (106) to drive the slide plate (104) to slide, so that the first motor (3) is connected with the second drive wheel (102).

9. The energy-saving high-temperature resistant negative pressure blower according to claim 8, characterized in that: The driving member comprises a spring (110) arranged in the fan housing (1), one end of the spring (110) being fixedly arranged on the slide plate (104), and the other end being fixedly arranged on the fan housing (1), the spring (110) being located on a side away from the permanent magnet (106), and the spring (110) being used to drive the slide plate (104) to have a movement tendency of sliding toward the electromagnet (105).

10. The energy-saving high-temperature resistant negative pressure fan according to claim 9, characterized in that: The invention also includes two push switches (112), both of which are arranged in the fan housing (1) and located at the two ends of the slide plate (104). The push switches (112) and the ends of the slide plate (104) are in a separated state. The push switches (112) are electrically connected to the first motor (3) and the second motor (9) that are obliquely opposite to each other. When the electromagnet (105) pushes the slide plate (104) to connect the first motor (3) with the second drive wheel (102), the slide plate (104) abuts against the push switches (112) to connect the first motor (3) with the mains. After the electromagnet (105) is powered off, the spring (110) drives the slide plate (104) to drive the second motor (9) to connect with the second drive wheel (102). The slide plate (104) abuts against the push switches (112) to electrically connect the second motor (9) with the energy storage battery (8).

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