Energy-saving high-temperature-resistant negative pressure fan

Abstract

The application relates to an energy-saving high-temperature-resistant negative pressure fan, belonging to the technical field of household negative pressure machines, which comprises a fan shell, the fan shell is in a cylindrical shape, a negative pressure fan is rotationally arranged in the fan shell, a first motor for driving the negative pressure fan to rotate 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, and the rotor is rotationally arranged in the fan shell, the application further comprises a rectifier ring, the rectifier ring is electrically connected with the rotor, an energy storage battery, the rectifier ring is electrically connected with the energy storage battery, a second motor 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, an adjusting device is further arranged, and the adjusting device is used for driving the negative pressure fan to rotate by the first motor or the second motor to discharge hot air in a room. The application has the effect of reducing the consumed electric energy of the negative pressure fan.

Description

Technical Field

[0001] This application relates to the field of household negative pressure machine technology, and in particular to an energy-saving high-temperature resistant negative pressure fan. Background Technology

[0002] Negative pressure fans utilize the cooling principle of air convection and negative pressure ventilation. They are designed to draw in fresh air naturally from opposite doors or windows at the installation location and quickly force the hot, stuffy air from the room to the outside. They are widely used in indoor ventilation, exhaust, cooling, and dust removal.

[0003] However, as a household negative pressure fan, it needs to run for a long time to allow air convection between indoors and outdoors and to cool the room. Therefore, negative pressure fans consume a lot of electricity when used for a long time. Summary of the Invention

[0004] To reduce the electrical energy consumed by negative pressure fans, this application provides an energy-saving high-temperature resistant negative pressure fan.

[0005] This application is achieved through the following technical solution: an energy-saving high-temperature resistant negative pressure fan, including a fan housing, the fan housing being cylindrical, a negative pressure fan being rotatably arranged inside the fan housing, the rotation axis of the negative pressure fan being coaxial with the fan housing, and a first motor for driving the negative pressure fan to rotate being arranged inside the fan housing, the first motor being electrically connected to the mains power.

[0006] A rotary fan is rotatably mounted inside the fan housing and located at the air outlet of the negative pressure fan. The rotary fan is coaxial with the fan housing. A stator and a rotor are disposed inside the fan housing. The stator is fixedly mounted on the inner wall of the fan housing. The rotor is rotatably mounted inside the fan housing and is coaxially mounted on the rotary fan and located between the stator and the fan housing. The fan housing also includes a rectifier ring electrically connected to the rotor and an energy storage battery electrically connected to the energy storage battery.

[0007] The fan casing is also equipped with a second motor for driving the negative pressure fan to rotate, and the energy storage battery is electrically connected to the second motor.

[0008] It also includes an adjustment device for driving a negative pressure fan to rotate and expel hot air from the room by a first motor or a second motor.

[0009] Furthermore, the adjustment device includes a first drive wheel, a second drive wheel, and a timing belt. Two of each of the first and second drive wheels are provided. The two first drive wheels are respectively mounted on the mounting shaft of the negative pressure fan and located on opposite sides of the negative pressure fan. The two second drive wheels are both located inside the fan housing and directly below the first drive wheels. Two timing belts are provided and are respectively used to wind around the first and second drive wheels. The first motor is used to drive the second drive wheel to rotate, and the second motor is used to drive the other second drive wheel to rotate. The adjustment device also includes an adjustment component, which is used to drive the first motor and the second motor to connect to their respective second drive wheels.

[0010] Furthermore, the adjusting component includes a sliding plate slidably disposed within the fan housing, the sliding plate sliding along the axial direction of the fan housing, the first motor and the second motor being respectively disposed on the sliding plate, the output shafts of the first motor and the second motor facing each other, and two second drive wheels located between the first motor and the second motor. The adjusting component also includes an electromagnet disposed within the fan housing and a permanent magnet fixedly disposed at the end of the sliding plate, the electromagnet pushing or pulling the permanent magnet to drive the sliding plate to slide, thereby driving the first motor and the second motor to connect to the corresponding second drive wheels respectively.

[0011] Furthermore, the mounting shaft of the second drive wheel is provided with a mounting groove, the mounting groove facing the corresponding first motor and second motor, the groove opening is polygonal, the output shafts of the first motor and the second motor are both cylindrical, and an adapter is also included. The adapter is used to drive the second drive wheel to rotate after the output shafts of the first motor and the second motor are inserted into the mounting groove.

[0012] Furthermore, the adapter includes a connecting post disposed on the output shaft of the first motor and the second motor. The connecting post is made of rubber, and its diameter is smaller than the width of the mounting groove opening. The connecting post is hollow and enters the mounting groove, abutting against the bottom of the mounting groove to compress the connecting post, causing the connecting post to deform and engage in the mounting groove.

[0013] Furthermore, a windproof shroud is provided inside the fan housing. The projection of the windproof shroud along the axial direction of the fan housing is disc-shaped. The windproof shroud is separated from the inner wall of the fan housing. A ventilation hole is provided at the axis of the windproof shroud. The ventilation hole is coaxial with the rotary fan. The negative pressure fan draws in hot air from the room and flows towards the windproof shroud. Some of the hot air flows through the ventilation hole towards the rotary fan, driving the rotary fan to rotate. The remaining hot air is discharged through the periphery of the windproof shroud.

[0014] Furthermore, the vertical cross-section of the windshield is folded and M-shaped, with the top of the M-shape facing the negative pressure fan.

[0015] Furthermore, the adjustment component also includes an indicator light mounted on the energy storage battery and a light sensor mounted inside the fan housing. When the indicator light is on, the energy storage battery is in a discharging state; when the indicator light is off, the energy storage battery is in a charging state. A controller is also installed inside the fan housing. The light sensor is electrically connected to the controller and receives the light signal from the indicator light, transmitting 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 from the indicator light, the controller sends a control signal to the control switch, causing the control switch to be in an open state. The component also includes a drive unit. When the control switch is open, the drive unit drives the sliding plate to connect the second motor and the second drive wheel. When the indicator light is off, the light sensor cannot receive a signal, and the controller sends a control signal to the control switch to connect the control switch, causing the electromagnet to generate a magnetic field that acts on the permanent magnet, causing the sliding plate to slide and connecting the first motor and the second drive wheel.

[0016] Furthermore, the driving component includes a spring disposed within the fan housing, one end of which is fixedly disposed on the slide plate and the other end of which is fixedly disposed on the fan housing. The spring is located on the side away from the permanent magnet and is used to drive the slide plate to have a tendency to slide towards the electromagnet.

[0017] Furthermore, it also includes two push switches, both of which are disposed inside the fan housing and located at both ends of the slide plate. The push switches are separated from the ends of the slide plate. The push switches are electrically connected to the first motor and the second motor, which are diagonally opposite each other. When the electromagnet pushes the slide plate to connect the first motor to the second drive wheel, the slide plate abuts against the push switch to connect the first motor to the mains power. After the electromagnet is de-energized, the spring drives the slide plate to connect the second motor to the second drive wheel. The slide plate abuts against the push switch to connect the second motor to the energy storage battery.

[0018] The technical solution of this application has at least the following advantages and beneficial effects:

[0019] 1. When the negative pressure fan is used for indoor ventilation, the first motor is started, which drives the negative pressure fan to rotate. The rotation of the negative pressure fan exhausts the hot air in the room, and fresh outdoor air is forced into the room to cool the room. When the negative pressure fan is ventilating, the air flow inside the fan casing drives the rotary fan to rotate. The rotary fan then drives the hot air inside the fan casing to be exhausted, which reduces the possibility of hot air re-entering the room. In addition, the air flow from the rotary fan inside the fan casing cools the negative pressure fan, which extends the service life of the negative pressure fan and improves its high temperature resistance.

[0020] 2. When the rotary fan rotates, it drives the rotor to rotate. The rotor's rotation cuts the magnetic field lines of the stator, generating current. This current enters the energy storage battery for energy storage. Subsequently, 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 operating, thereby reducing the energy consumption of the first motor. When the energy storage battery is depleted, 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 simultaneously charging the energy storage battery, further reducing the energy consumption of the negative pressure fan. At the same time, the rotary fan and the negative pressure fan are in a separate state, which further reduces the additional energy consumption of the first motor by the rotary fan, further reducing energy consumption.

[0021] 3. When the negative pressure fan rotates at low speed, the sliding seat is moved off the fixed seat, thereby reducing the number of effective fan blades on the central shaft, thus reducing the load on the central shaft and reducing the power consumption of 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 and thus achieving rapid cooling of the room. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] 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 this application;

[0024] Figure 2 This is a cross-sectional view of the fan casing in an energy-saving high-temperature resistant negative pressure fan according to an embodiment of this application;

[0025] Figure 3 yes Figure 2 Side view;

[0026] Figure 4 yes Figure 3 An enlarged schematic diagram of part A in the middle;

[0027] Figure 5 yes Figure 3 Enlarged schematic diagram of part B;

[0028] Figure 6 This is a schematic diagram of the negative pressure fan in an energy-saving high-temperature resistant negative pressure fan according to an embodiment of this application;

[0029] Figure 7 This is a schematic diagram of the adjustment device in an energy-saving high-temperature resistant negative pressure fan according to an embodiment of this application;

[0030] Figure 8 This is a schematic diagram of the fan blade structure in an energy-saving high-temperature resistant negative pressure fan according to an embodiment of this application;

[0031] Figure 9 This is a schematic diagram of the structure of the fixed seat and sliding seat in an energy-saving high-temperature resistant negative pressure fan according to an embodiment of this application;

[0032] Figure 10 This is a cross-sectional view of the fixed seat and sliding seat in an energy-saving high-temperature resistant negative pressure fan according to an embodiment of this application;

[0033] Figure 11 yes Figure 10 A magnified view of a portion of the image.

[0034] Explanation of reference numerals in the attached diagram: 1. Fan casing; 2. Negative pressure fan; 3. First motor; 4. Rotary fan; 5. Stator; 6. Rotor; 7. Rectifier ring; 8. Energy storage battery; 9. Second motor;

[0035] 10. Adjustment device; 101. First drive wheel; 102. Second drive wheel; 103. Synchronous belt; 104. Slide plate; 105. Electromagnet; 106. Permanent magnet; 107. Indicator light; 108. Light sensor; 109. Controller; 110. Spring; 112. Push switch;

[0036] 11. Connecting groove; 12. Connecting notch; 13. Mounting groove; 14. Connecting column; 15. Wind shield; 16. Connecting rod; 17. Ventilation hole; 18. Central shaft;

[0037] 19. Mounting base; 191. Fixed base; 192. Sliding base;

[0038] 20. Fan blade; 21. Insert; 22. Slot; 23. Miniature push rod; 24. Mounting bracket; 25. Ball bearing; 26. Wedge block; 27. Fixing groove; 28. Snap-fit ​​groove; 29. ​​Second spring; 30. Third spring. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0041] The following description, in conjunction with specific embodiments, provides further details. Figure 1 and Figure 2 This application discloses an energy-saving, high-temperature resistant negative pressure fan. (Refer to...) Figure 1 and Figure 2 The energy-saving high-temperature resistant negative pressure fan includes a fan housing 1, which is cylindrical. A negative pressure fan 2 is rotatably installed inside the fan housing 1. The rotation axis of the negative pressure fan 2 is coaxial with that of the fan housing 1. A first motor 3 is installed inside the fan housing 1 to drive the rotation of the negative pressure fan 2. The first motor 3 is electrically connected to the mains power. When the negative pressure fan is performing ventilation operations in the room, the first motor 3 is started, which drives the negative pressure fan 2 to rotate. The rotation of the negative pressure fan 2 exhausts the hot air in the room and fresh air from the outside is forced into the room, thereby cooling the room.

[0042] Reference Figure 2 , Figure 3 and Figure 4 To reduce the electrical energy consumption of the negative pressure fan, a rotary fan 4 is rotatably installed inside the fan housing 1 and located at the air outlet 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 installed inside the fan housing 1. The stator 5 is a permanent magnet and there are two of them. The rotor 6 is a coil. The stator 5 is fixedly installed on the inner wall of the fan housing 1. The rotor 6 is rotatably installed inside the fan housing 1. The rotor 6 is coaxially installed on the rotary fan 4 and located between the stators 5. It also includes a rectifier ring 7, which is electrically connected to the rotor 6. It also includes an energy storage battery 8, which is electrically connected to the rectifier ring 7.

[0043] Reference Figure 2 , Figure 3 and Figure 4 Inside the fan housing 1, there is also a second motor 9 for driving the negative pressure fan 2 to rotate, and the energy storage battery 8 is electrically connected to the second motor 9;

[0044] Reference Figure 2 , Figure 3 and Figure 4 It also includes an adjustment device 10, which is used to drive the first motor 3 or the second motor 9 to rotate the negative pressure fan 2 to exhaust the hot air in the room.

[0045] When the rotary fan 4 rotates, it drives the rotor 6 to rotate. The rotation of the rotor 6 cuts the magnetic field lines of the stator 5, generating current. The current enters the energy storage battery 8 for energy storage. Then, the adjustment device 10 drives the second motor 9 to connect with the negative pressure fan 2. The negative pressure fan 2 is driven by the energy storage battery 8 to perform ventilation. At this time, the first motor 3 stops working, thereby reducing the power consumption of the first motor 3. When the energy storage battery 8 is depleted, 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 while simultaneously charging the energy storage battery 8, further reducing the power consumption of 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 additional power consumption of the first motor 3 by the rotary fan 4, further reducing power consumption.

[0046] Reference Figure 3 and Figure 5 In this embodiment, the adjustment device 10 includes a first drive wheel 101, a second drive wheel 102, and a timing belt 103. The peripheral walls of both the first drive wheel 101 and the second drive wheel 102 are recessed to form connecting grooves 11. Two first drive wheels 101 and two second drive wheels 102 are provided. The two first drive wheels 101 are respectively mounted on the mounting shaft of the negative pressure fan 2 and located on both sides of the negative pressure fan 2. The two second drive wheels 102 are both located inside the fan housing 1 and directly below the first drive wheels 101. Two timing belts 103 are provided and are respectively used to wind around the first drive wheels 101 and the second drive wheels 102. The first motor 3 is used for... The second motor 9 drives the second drive wheel 102 to rotate. The adjustment device 10 also includes an adjustment component, which drives the first motor 3 and the second motor 9 to connect to the corresponding second drive wheel 102 respectively. When the first motor 3 or the second motor 9 starts, it drives the second drive wheel 102 to rotate. The rotation of the second drive wheel 102 drives the synchronous belt 103 to run. The running of the synchronous belt 103 drives the first drive wheel 101 to rotate. The rotation of the first drive wheel 101 drives the negative pressure fan 2 to rotate. Under the action of the adjustment component, it is convenient to replace the connection of the first motor 3 or the second motor 9 with the corresponding second drive wheel 102.

[0047] Combination Figure 6In this embodiment, the adjusting component includes a sliding plate 104 slidably disposed within the fan housing 1. The sliding plate 104 is located at the bottom of the fan housing 1 and slides along the axial direction of the fan housing 1. A first motor 3 and a second motor 9 are respectively disposed on the sliding plate 104, with the output shafts of the first motor 3 and the second motor 9 facing each other. Two second drive wheels 102 are located between the first motor 3 and the second motor 9. Furthermore, a connecting notch 12 is provided in the middle of the sliding plate 104, and the two second drive wheels 102 are both surrounded within the connecting notch 12. The adjusting component also includes a first electromagnet 105 disposed within the fan housing 1 and a permanent magnet 106 fixedly disposed at the end of the sliding plate 104. The first electromagnet 105 pushes or pulls the permanent magnet 106 to drive the sliding plate 104 to slide, thereby driving the first motor 3 and the second motor 9 to connect with the corresponding second drive wheels 102.

[0048] When the first electromagnet 105 is energized, it generates a magnetic field that acts on the permanent magnet 106. Under the action of the repulsive force, the slide plate 104 slides away from the first electromagnet 105. The slide plate 104 drives the first motor 3 to move towards the corresponding second drive wheel 102 to connect. The second motor 9 moves away from the second drive wheel 102 to separate, thus completing the conversion between the first motor 3 and the second motor 9. The operation is simple and convenient.

[0049] Reference Figure 3 and Figure 5 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 provided on the mounting shaft of the second drive wheel 102. The mounting groove 13 faces the corresponding first motor 3 and second motor 9. The opening of the mounting groove 13 is polygonal. The output shafts of the first motor 3 and the second motor 9 are both cylindrical. The device also includes an adapter. 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.

[0050] Reference Figure 3 and Figure 5 The adapter includes a connecting post 14 mounted on the output shaft of the first motor 3 and the second motor 9. The connecting post 14 is made of rubber and its diameter is smaller than the opening width of the mounting groove 13. The connecting post 14 is hollow and enters the mounting groove 13. It abuts against the bottom of the mounting groove 13 and compresses the connecting post 14, causing it to deform and lock into the mounting groove 13.

[0051] When the first motor 3 and the second motor 9 are connected to the corresponding second drive wheel 102, the connecting post 14 moves toward the mounting groove 13 and is inserted into the mounting groove 13. After the connecting post 14 abuts against the bottom wall of the mounting groove 13, the connecting post 14 deforms and is locked at the corner of the mounting groove 13, thus 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 post 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 post 14 is inserted into the mounting groove 13 to complete the connection.

[0052] Reference Figure 2 and Figure 3 To facilitate the rotation of the rotary fan 4 by the air inside the fan housing 1 and to expel the hot air inside the fan housing 1, a windproof cover 15 is provided inside the fan housing 1. The projection of the windproof cover 15 on the axial direction of the fan housing 1 is disc-shaped. The windproof cover 15 is separated from the inner wall of the fan housing 1. In this embodiment, a connecting rod 16 is provided between the windproof cover and the fan housing 1. Multiple connecting rods 16 are provided and are evenly arranged along the circumference of the windproof cover. A ventilation hole 17 is provided at the axis of the windproof cover 15. The ventilation hole 17 is coaxial with the rotary fan 4. The negative pressure fan 2 draws in the hot air in the room and flows toward the windproof cover 15. Some of the hot air flows toward the rotary fan 4 through the ventilation hole 17 and drives the rotary fan 4 to rotate. The remaining hot air is discharged through the periphery of the windproof cover 15.

[0053] Reference Figure 2 and Figure 3 Furthermore, the vertical cross-section of the windshield 15 is folded and M-shaped, with the top of the M-shape facing the negative pressure fan 2.

[0054] When the negative pressure fan 2 exhausts hot air from the room, the hot air flows toward the exhaust hood. The hot air located on the axis is exhausted through the ventilation hole 17. When the hot air impacts the turning point of the exhaust hood, some of the hot air flows along the corner into the through hole, while the rest flows out from the outer edge of the exhaust hood. 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.

[0055] Reference Figure 3 In this embodiment of the application, the adjustment component also includes an indicator light 107 disposed on the energy storage battery 8 and a light sensor 108 disposed inside the fan housing 1. When the indicator light 107 is on, the energy storage battery 8 is in a discharging state, and when the indicator light 107 is off, the energy storage battery 8 is in a charging state.

[0056] Reference Figure 2 and Figure 3Inside the fan housing 1, there is also a controller 109. A light sensor 108 is electrically connected to the controller 109. The light sensor 108 is facing the indicator light 107. The light sensor 108 is used to receive the light signal from the indicator 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 from the indicator light 107, the controller 109 sends a control signal to the control switch to make the control switch open. It also includes a drive unit. When the control switch is open, the drive unit drives the slide plate 104 to drive the second motor 9 and connect it to the second drive wheel 102.

[0057] After the indicator light 107 is turned off, the light sensor 108 cannot receive the signal. The controller 109 sends a control signal to the control switch to make the control switch open, which causes the first electromagnet 105 to generate a magnetic field and act on the permanent magnet 106 to drive the slide plate 104 to slide, thereby connecting the first motor 3 with the second drive wheel 102.

[0058] Combination Figure 6 The driving component includes a first spring 110 disposed inside the fan housing 1. One end of the first spring 110 is fixedly disposed on the slide plate 104, and the other end is fixedly disposed 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 plate 104 to have a tendency to slide towards the first electromagnet 105.

[0059] When the energy storage battery 8 is charged by the negative pressure fan 2, the indicator 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 turns on, connecting the first electromagnet 105 to the mains power. At this time, the first electromagnet 105 generates a repulsive force on the permanent magnet 106, pushing the slide plate 104 to slide. The slide plate 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 plate 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, thereby driving the negative pressure fan 2 to charge the battery. When the negative pressure fan 2 rotates, it drives the airflow and blows the rotary fan 4 to rotate. When the energy storage battery 8 has finished storing energy, 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 it to the control switch of the first electromagnet 105. When the control switch is turned off, the first electromagnet 105 is disabled. At this time, the first spring 110 restores its deformation and pushes the slide plate 104 to slide. The slide plate 104 drives the second motor 9 to be inserted into the mounting slot 13. At this time, the second motor 9 drives the second drive wheel 102 to rotate, which drives the negative pressure fan 2 to rotate.

[0060] Reference Figure 6 and Figure 7To facilitate the starting and stopping of the first motor 3 and the second motor 9, two push switches 112 are also included. Both push switches 112 are located inside the fan housing 1 and at both ends of the slide plate 104. The push switches 112 are separated from the ends of the slide plate 104. The push switches 112 are electrically connected to the first motor 3 and the second motor 9, which are diagonally opposite each other. When the first electromagnet 105 pushes the slide plate 104 to connect the first motor 3 to the second drive wheel 102, the slide plate 104 abuts against the push switches 112 to connect the first motor 3 to the mains power. After the first electromagnet 105 is de-energized, the first spring 110 drives the slide plate 104 to connect the second motor 9 to the second drive wheel 102. The slide plate 104 abuts against the push switches 112 to connect the second motor 9 to the energy storage battery 8.

[0061] Reference Figure 8 and Figure 9 After the negative pressure fan 2 has been exchanging air in the room for a long time, and the indoor temperature and air freshness have reached a certain range, the negative pressure fan 2 still needs to continue to work to maintain air exchange. 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 low speed, in this embodiment of the application, a mounting base 19 is provided on the central shaft 18 of the negative pressure fan 2, and the fan blades 20 of the negative pressure fan 2 are fixedly mounted on the mounting base 19. The mounting base 19 includes a fixed base 191 and a fixed base 192. There are two sliding seats 192 located on both sides of the fixed seat 191. The fan blade 20 is fixedly mounted on the fixed seat 191 and the sliding seat 192. The fixed seat 191 is fixedly mounted on the central shaft 18. The sliding seat 192 rotates and slides on the central shaft 18. The sliding seat 192 rotates about the central shaft 18 and slides along the length of the central shaft 18. The sliding seat 192 is annular and has a piece 21 facing the fixed seat 191. The fan blade 20 is fixedly mounted on the piece 21. The fixed seat 191 has a slot 22 for the piece 21 to be inserted. When the piece 21 is inserted into the slot 22, the fan blade 20 on the fixed seat 191 and the sliding seat 192 are on the same plane.

[0062] When the negative pressure fan 2 rotates at a low speed, in order to further reduce the power consumption of the negative pressure fan 2, the sliding seat 192 is moved off the fixed seat 191, thereby reducing the load on the central shaft 18 and thus reducing the power consumption of the negative pressure fan 2; when the room 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, and thus achieving rapid cooling of the room.

[0063] 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 increases, the second strong magnet is attracted to the first strong magnet, thereby fixing the sliding seat 192 and the fixed seat 191.

[0064] Reference Figure 10 and Figure 11 Furthermore, a miniature push rod 23 is provided on the mounting bracket 24 of the negative pressure fan 2. The output shaft of the miniature push rod 23 is perpendicular to and faces the sliding seat 192. A ball bearing 25 is provided at the end of the output shaft of the miniature push rod 23. The ball bearing 25 is slidably disposed on the output shaft of the miniature push rod 23 and slides along the length direction of the output shaft. Furthermore, a wedge block 26 is slidably disposed on the output shaft of the miniature push rod 23. The sliding direction of the wedge block 26 is perpendicular to the output shaft of the miniature push rod 23, and the inclined surface of the wedge block 26 abuts against the ball bearing 25. The sliding seat 192 has an opening facing the output shaft of the electric push rod. The device has a fixed groove 27, and the inner wall of the fixed groove 27 is provided with a snap-fit ​​groove 28 for the wedge block 26 to snap into. When the output shaft of the micro push rod 23 moves toward the sliding seat 192 and enters the snap-fit ​​groove 28, the ball 25 abuts against the bottom wall of the snap-fit ​​groove 28 and drives the wedge block 26 into the snap-fit ​​groove 28, thereby connecting the micro push rod 23 and the sliding seat 192. Then, the sliding seat 192 and the fixed seat 191 can be installed or removed. The micro push rod can fix the sliding seat on the sliding seat or remove the sliding seat from the fixed seat, thereby reducing the installation personnel's high-altitude work and facilitating the adjustment of the sliding seat position.

[0065] Reference Figure 10 and Figure 11 Furthermore, a second spring 29 and a third spring 30 are provided inside the output shaft of the miniature push rod 23. The second spring 29 is used to drive the ball 25 to have a tendency to move towards the outside of the output shaft, and the third spring 30 drives the wedge to have a tendency to slide towards the inside of the output shaft. When the ball 25 is separated from the bottom wall of the fixed groove 27, the third spring 30 pulls the wedge block 26 into the output shaft, which facilitates the separation of the miniature push rod 23 from the sliding seat 192.

[0066] The implementation principle of an energy-saving high-temperature resistant negative pressure fan in this application embodiment is as follows:

[0067] When the negative pressure fan is used to ventilate the room, the first motor 3 is started, which drives the negative pressure fan 2 to rotate. The negative pressure fan 2 rotates and exhausts the hot air in the room, while the fresh air from the outside is forced into the room, thus cooling the room. When the exhaust hot air passes through the exhaust hood, the hot air drives the rotary fan 4 to rotate, which in turn drives the rotor 6 to rotate. The rotor 6 rotates and cuts the magnetic field lines of the stator 5 to generate 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 in the off state.

[0068] When indicator light 107 is off, controller 109 sends a control signal to the control switch of first electromagnet 105. The control switch is turned on, connecting first electromagnet 105 to mains power. At this time, first electromagnet 105 generates a repulsive force on permanent magnet 106, pushing slide plate 104 to slide. Slide plate 104 moves away from first electromagnet 105. During this process, first spring 110 is in a compressed state. At the same time, slide plate 104 drives the output shaft of first motor 3 to be inserted into mounting slot 13. At this time, slide plate 104 abuts against push switch 112, connecting first motor 3 to mains power. First motor 3 is started, driving second drive wheel 102 to rotate, which drives negative pressure fan 2 to rotate. Negative pressure fan 2 drives airflow, which blows rotary fan 4 to rotate.

[0069] When the energy storage battery 8 completes 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 it to the control switch of the first electromagnet 105. The control switch is turned off, and the first electromagnet 105 is disabled. At this time, the first spring 110 restores its deformation and pushes the slide plate 104 to slide. The slide plate 104 drives the second motor 9 to be inserted into the mounting slot 13. At the same time, the slide plate 104 abuts against the push switch 112, so that the second motor 9 is electrically connected to the energy storage battery 8. The second motor 9 drives the second drive wheel 102 to rotate, which drives the negative pressure fan 2 to rotate.

[0070] In the above process, the switching between the first motor 3 and the second motor 9 reduces the usage time of the first motor 3, thereby reducing the consumption of electrical energy.

[0071] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An energy-saving high-temperature resistant negative pressure fan, characterized in that: Includes a fan housing (1), the fan housing (1) is cylindrical, a negative pressure fan (2) is rotatably installed inside the fan housing (1), the rotation axis of the negative pressure fan (2) is coaxial with the fan housing (1), and a first motor (3) for driving the negative pressure fan (2) to rotate is installed inside the fan housing (1), the first motor (3) is electrically connected to the mains power. A rotary fan (4) is rotatably mounted inside the fan housing (1) and located at the air outlet of the negative pressure fan (2). The rotary fan (4) is coaxial with the fan housing (1). A stator (5) and a rotor (6) are mounted inside the fan housing (1). The stator (5) is fixedly mounted on the inner wall of the fan housing (1). The rotor (6) is rotatably mounted inside the fan housing (1). The rotor (6) is coaxially mounted on the rotary fan (4) and located between the stator (5). A rectifier ring (7) is also included. The rectifier ring (7) is electrically connected to the rotor (6). An energy storage battery (8) is also included. The rectifier ring (7) is electrically connected to the energy storage battery (8). The fan housing (1) is also equipped with a second motor (9) for driving the negative pressure fan (2) to rotate, and the energy storage battery (8) is electrically connected to the second motor (9); It also includes an adjustment device (10) for driving the first motor (3) or the second motor (9) to rotate the negative pressure fan (2) to exhaust the hot air in the room; The fan housing (1) is provided with a wind shield (15). The projection of the wind shield (15) on the axial direction of the fan housing (1) is disc-shaped. The wind shield (15) is separated from the inner wall of the fan housing (1). A ventilation hole (17) is provided at the axial direction of the wind shield (15). The ventilation hole (17) is coaxial with the rotary fan (4). The negative pressure fan (2) draws hot air from the room and flows toward the wind shield (15). Some of the hot air flows toward the rotary fan (4) through the ventilation hole (17) and drives the rotary fan (4) to rotate. The remaining hot air is discharged through the outside of the wind shield (15). The vertical cross-section of the wind shield (15) is folded and M-shaped, with the top of the M-shape facing the negative pressure fan (2).

2. The energy-saving high-temperature resistant negative pressure fan according to claim 1, characterized in that: The adjustment device (10) includes a first drive wheel (101), a second drive wheel (102), and a timing belt (103). There are two of each of the first drive wheel (101) and the second drive wheel (102). The two first drive wheels (101) are respectively mounted on the mounting shaft of the negative pressure fan (2) and located on both sides of the negative pressure fan (2). The two second drive wheels (102) are respectively located inside the fan housing (1) and directly below the first drive wheel (101). There are two timing belts (103) and they are 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. The second motor (9) is used to drive the other second drive wheel (102) to rotate. The adjustment device (10) also includes an adjustment component, which 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 component includes a sliding plate (104) slidably disposed inside the fan housing (1). The sliding plate (104) slides along the axial direction of the fan housing (1). The first motor (3) and the second motor (9) are respectively disposed on the sliding plate (104). The output shafts of the first motor (3) and the second motor (9) face each other, and two second drive wheels (102) are located between the first motor (3) and the second motor (9). The adjusting component also includes an electromagnet (105) disposed inside the fan housing (1) and a permanent magnet (106) fixedly disposed at the end of the sliding plate (104). The electromagnet (105) pushes or pulls the permanent magnet (106) to drive the sliding plate (104) to slide, thereby driving the first motor (3) and the second motor (9) to connect to the corresponding second drive wheels (102).

4. The energy-saving high-temperature resistant negative pressure fan according to claim 3, characterized in that: The second drive wheel (102) has a mounting groove (13) on its mounting shaft. The mounting groove (13) faces the corresponding first motor (3) and second motor (9). The opening of the mounting groove (13) is polygonal. The output shafts of the first motor (3) and the second motor (9) are both cylindrical. The second drive wheel (102) 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).

5. The energy-saving high-temperature resistant negative pressure fan according to claim 4, characterized in that: The adapter includes a connecting post (14) disposed on the output shaft of the first motor (3) and the second motor (9). The connecting post (14) is made of rubber and its diameter is smaller than the opening width of the mounting groove (13). The connecting post (14) is hollow and enters the mounting groove (13) to abut against the bottom of the mounting groove (13) to compress the connecting post (14), causing the connecting post (14) to deform and be locked in the mounting groove (13).

6. The energy-saving high-temperature resistant negative pressure fan according to claim 3, characterized in that: The adjustment component also includes an indicator light (107) mounted on the energy storage battery (8) and a light sensor (108) mounted inside the fan housing (1). When the indicator light (107) is on, the energy storage battery (8) is in a discharging state; when the indicator light (107) is off, the energy storage battery (8) is in a charging state. A controller (109) is also mounted inside the fan housing (1). The light sensor (108) is electrically connected to the controller (109). The light sensor (108) receives the light signal from the indicator light (107) and transmits the light signal to the controller (109). The controller (109) is electrically connected to the control switch of the electromagnet (105). After the light sensor (108) receives the light signal from the indicator lamp (107), the controller (109) sends a control signal to the control switch to make the control switch open. The controller also includes a drive unit, which is used to drive the slide plate (104) to drive the second motor (9) and the second drive wheel (102) when the control switch is open. After the indicator lamp (107) is turned off, the light sensor (108) cannot receive the signal. The controller (109) sends a control signal to the control switch to make the control switch open, and the electromagnet (105) generates a magnetic field that acts on the permanent magnet (106) to drive the slide plate (104) to slide, thereby connecting the first motor (3) and the second drive wheel (102).

7. The energy-saving high-temperature resistant negative pressure fan according to claim 6, characterized in that: The driving component includes a spring (110) disposed inside the fan housing (1). One end of the spring (110) is fixedly disposed on the slide plate (104), and the other end is fixedly disposed on the fan housing (1). The spring (110) is located on the side away from the permanent magnet (106). The spring (110) is used to drive the slide plate (104) to have a tendency to slide towards the electromagnet (105).

8. The energy-saving high-temperature resistant negative pressure fan according to claim 7, characterized in that: It also includes two push switches (112), both of which are located inside the fan housing (1) and at both ends of the slide plate (104). The push switches (112) are separated from the ends of the slide plate (104). The push switches (112) are electrically connected to the first motor (3) and the second motor (9) which are diagonally opposite 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 switch (112) to connect the first motor (3) with the mains power. After the electromagnet (105) is de-energized, 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 switch (112) to connect the second motor (9) with the energy storage battery (8).

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