A cooling fan with a primary air fan high-voltage frequency converter

Abstract

The present invention discloses a cooling fan with a primary fan high-voltage frequency converter, belonging to the technical field of high-voltage frequency converter cooling fans. The present invention is used to solve the technical problems that the air intake efficiency of the frequency converter's own air inlet is low, the filtering effect is not ideal, a large amount of conductive dust accumulates inside the high-voltage frequency converter, the internal components of the frequency converter are very easy to be damaged by insulation breakdown; the air in some areas is relatively humid, and the contact between cold and hot air flows is easy to produce condensation, causing the internal components of the high-voltage frequency converter to short-circuit. The present invention includes a fan housing, one end of the fan housing is provided with an air inlet cavity, and a first filter is installed at the external opening of the air inlet cavity. The vibration motor of the present invention drives the vibration frame to vibrate at high frequency, which is convenient for shaking off the dust particles intercepted on the second filter, and sliding along the inclined wall at the bottom of the air inlet cavity into the dust collecting box, so as to realize continuous dust collection and maintain the filtering performance of the second filter; multiple groups of cold water pipes are arranged inside the second filter for preliminary heat exchange.

Description

Technical Field

[0001] The present invention relates to the technical field of cooling fans for high-voltage inverters, and particularly to a cooling fan for a high-voltage inverter with a primary fan. Background Art

[0002] A high-voltage inverter is a speed control device that changes the output frequency and output voltage to control the speed of an AC high-voltage motor. The inverter is a power control device that converts the power frequency power supply into electrical energy of another frequency by the on-off action of power semiconductor devices. With the rapid development of modern power electronics technology and microelectronics technology, high-voltage high-power variable frequency speed control devices have been continuously matured. The high-voltage problem that has been difficult to solve has been well solved in recent years through device series connection or unit series connection.

[0003] When existing high-voltage inverters are in use, multiple groups of cooling fans are configured. The cooling method is to extract outdoor air to cool down the high-voltage inverter. The intake port filter of the inverter itself has a simple structure. After long-term use, dust is likely to accumulate, resulting in low air intake efficiency and unsatisfactory filtering effect. A large amount of conductive dust accumulates inside the high-voltage inverter, and the internal components of the inverter are extremely vulnerable to insulation breakdown and damage; in some areas, the air is relatively humid, and condensation is likely to occur when hot and cold air currents come into contact, resulting in short circuits of the internal components of the high-voltage inverter;

[0004] In view of the above technical defects, a solution is now proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a cooling fan for a high-voltage inverter with a primary fan to solve the problems that the intake port filter of the inverter itself has a simple structure, dust is likely to accumulate after long-term use, resulting in low air intake efficiency and unsatisfactory filtering effect, a large amount of conductive dust accumulates inside the high-voltage inverter, and the internal components of the inverter are extremely vulnerable to insulation breakdown and damage; in some areas, the air is relatively humid, and condensation is likely to occur when hot and cold air currents come into contact, resulting in short circuits of the internal components of the high-voltage inverter.

[0006] The purpose of the present invention can be achieved by the following technical solutions: A cooling fan for a high-voltage inverter with a primary fan includes a fan housing. One end of the fan housing is provided with an intake cavity. A first filter screen is snap-fitted and installed at the external opening of the intake cavity. A vibration frame is installed at the internal opening of the intake cavity. A second filter screen is fixedly installed on the frame of the vibration frame. A cold water pipe is installed inside the second filter screen. A vibration motor is fixedly installed on one side of the vibration frame. A dust collection box is slidably connected to the bottom of the fan housing near the intake cavity. The dust collection box includes an outer air guide plate. A high-voltage fan is fixedly installed at the center of the inner cavity of the fan housing;

[0007] The high-pressure blower includes a third filter screen. A frequency converter air inlet hood is installed side by side on the side of the third filter screen. An air inlet valve and a first air outlet valve are fixedly installed on the surface of the hood body of the frequency converter air inlet hood. A frequency converter air exhaust hood is installed side by side on the side of the frequency converter air inlet hood. A water tank is installed side by side on the side of the frequency converter air exhaust hood.

[0008] The water tank includes a return water chamber. A heat exchange mechanism is fixedly installed on the top of the return water chamber. The heat exchange mechanism includes a heat insulation pipe. Multiple groups of heat dissipation fins are fixedly installed on both sides of the heat insulation pipe. An exhaust port is fixedly installed at one end of the heat exchange mechanism.

[0009] Preferably, the interior of the air inlet chamber is of a quadrangular pyramid structure. An outer air guide plate is fixedly installed at an angle of 45° on the bottom of the air inlet chamber near the first filter screen. A leakage port communicating with the dust collection box is opened at the bottom of the side where the outer air guide plate forms an angle with the air inlet chamber. An inner air guide plate close to the outer air guide plate is fixedly installed on the inclined wall inside the air inlet chamber. The opening of the angle of the outer air guide plate faces the inner air guide plate. A gap of 2-4 cm is provided between the inner air guide plate and the inclined plane at the bottom of the air inlet chamber.

[0010] Preferably, a rubber sleeve for sealing connection with the inclined plane inside the air inlet chamber is provided at the edge of the frame body of the vibration frame. The second filter screen frame is fixedly installed in the middle of the frame body of the vibration frame close to the air inlet chamber. Multiple groups of cold water pipes are fixedly installed inside the second filter screen. Water pipes connecting the water tank and the return water chamber are provided at both ends of the cold water pipes.

[0011] Preferably, an eccentric wheel group is provided at the output end of the vibration motor. A transmission rod connected to the eccentric wheel group is provided on the side of the vibration frame. Multiple groups of spring members are symmetrically arranged up and down on both sides of the vibration frame and are connected to the inside of the blower housing.

[0012] Preferably, a hole connected to the high-pressure blower is provided in the middle of the frame body of the vibration frame, and a rubber sleeve is hermetically sleeved on the edge of the hole. The third filter screen is fixedly installed on the air outlet of the housing of the high-pressure blower. Multiple groups of water-gas separators are fixedly installed on both sides of the third filter screen. A cold air pipe communicating with the third filter screen and the frequency converter air inlet hood is provided on the outer wall of the side of the water-gas separator. A drain pipe connecting to the return water chamber is provided at the bottom of the water-gas separator.

[0013] Preferably, an air inlet valve connected to the cold air pipe is provided at the top of the frequency converter air inlet hood. A cold air branch pipe connected to the heat exchange mechanism is installed on the side wall of the hood body of the frequency converter air inlet hood. Multiple groups of limit blocks are installed in the inner cavity of the frequency converter air inlet hood. A second air outlet valve connected to the heat exchange mechanism is installed on the side wall of the hood body of the frequency converter air exhaust hood. The frequency converter air inlet hood communicates with the bottom of the frequency converter air exhaust hood.

[0014] Preferably, a heat insulation layer is embedded in the inner wall of the return water cavity. A water filter screen is installed on the bottom of the inner cavity of the return water cavity. A heat conducting sheet connected to the heat sink is installed at the top of the inner cavity of the return water cavity. A circulating water pump connected to the water delivery pipe is fixedly installed on one side of the inner cavity of the water tank. The bottom of the return water cavity is communicated with the water tank.

[0015] Preferably, the heat insulation pipe is communicated with the second air outlet valve. The heat insulation pipe is arranged at the center of the inner cavity of the heat exchange mechanism. Multiple groups of heat sinks are symmetrically arranged on the inner cavity wall of the heat exchange mechanism. Multiple groups of cold air outlets are fixedly installed on the inner wall of the heat exchange mechanism close to the exhaust hood of the frequency converter. Multiple groups of cold air outlets are connected to cold air branch pipes. The exhaust port is fixed at the bottom of the outer wall of the fan housing far from the air inlet cavity. Maintenance covers are fixedly installed on both sides of the outer wall of the fan housing.

[0016] Advantages of the present invention:

[0017] (1) In the present invention, the outer air guide plate and the inner air guide plate are used in cooperation to guide the external air flow to enter from the area above the middle of the air inlet cavity, and the external introduced air flow is double-filtered by the first filter screen and the second filter screen; the vibration motor drives the vibration frame to vibrate at a high frequency, which is convenient for shaking off the dust particles intercepted on the second filter screen and sliding down along the inclined wall at the bottom of the air inlet cavity into the dust collection box, realizing continuous dust collection and maintaining the filtering performance of the second filter screen; multiple groups of cold water pipes are arranged inside the second filter screen to contact the external air and perform preliminary heat exchange to reduce the temperature of the external air, which helps to efficiently cool the inside of the high-voltage frequency converter.

[0018] (2) The purified external air is conveyed into the third filter screen by the high-pressure fan for further meticulous purification and filtration to remove fine impurity particles in the cooled air; the air after multiple purifications is conveyed into the water-air separator to separate the excess water in the purified air, avoiding the condensation phenomenon caused by the contact and mixing of the hot and cold air flows inside the high-voltage frequency converter.

[0019] (3) The warm water generated by heat exchange in the cold water pipes flows back to the return water cavity through the water delivery pipe. The return water cavity guides and transfers the heat of the warm water to the heat sink through the heat conducting sheet. The cold air blown out through the cold air outlet helps the heat on the heat sink to be conveyed along the inner cavity of the heat exchange mechanism into the exhaust port, and at the same time, the water filter screen continuously filters the returned water in the return water cavity. Description of the drawings

[0020] The present invention will be further described below in conjunction with the drawings;

[0021] Figure 1 is the three-dimensional structure diagram of the overall structure of the present invention;

[0022] Figure 2 is the schematic side view structure diagram of the air inlet cavity of the present invention;

[0023] Figure 3It is a schematic diagram of the overall top-down sectional structure of the present invention;

[0024] Figure 4 It is the present invention Figure 3 An enlarged view of area A in it;

[0025] Figure 5 It is a schematic diagram of the high-pressure blower structure of the present invention;

[0026] Figure 6 It is a schematic diagram of the heat exchange mechanism structure of the present invention;

[0027] Figure 7 It is a schematic diagram of the water tank part structure of the present invention.

[0028] Legend: 1. Blower housing; 2. Air intake chamber; 201. First filter screen; 202. Inner air guide plate; 203. Rubber sleeve; 204. Vibration frame; 205. Second filter screen; 206. Cold water pipe; 207. Water delivery pipe; 208. Spring member; 209. Hole; 3. Dust collection box; 301. Outer air guide plate; 302. Leakage port; 4. Maintenance cover; 5. Vibration motor; 501. Eccentric wheel group; 502. Transmission rod; 6. High-pressure blower; 601. Third filter screen; 603. Inlet hood of frequency converter; 604. Inlet valve; 605. First outlet valve; 606. Limit block; 607. Exhaust hood of frequency converter; 608. Second outlet valve; 609. Cold air branch pipe; 7. Water-air separator; 701. Cold air pipe; 702. Drain pipe; 8. Water tank; 801. Return water chamber; 802. Water filter screen; 803. Circulating water pump; 804. Heat insulation layer; 805. Heat conducting sheet; 9. Heat exchange mechanism; 901. Heat sink; 902. Heat insulation pipe; 903. Cold air port; 10. Exhaust port. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] Embodiment 1:

[0031] This embodiment is used to solve the problems that the built-in air intake filtering structure of the frequency converter is simple, dust is likely to accumulate after long-term use, resulting in low air intake efficiency and unsatisfactory filtering effect, a large amount of conductive dust accumulates inside the high-voltage frequency converter, and the internal components of the frequency converter are extremely vulnerable to insulation breakdown and damage.

[0032] Please refer to Figures 1-4As shown in the figure, this embodiment is a cooling fan with a primary fan high-voltage frequency converter, including a fan housing 1. One end of the fan housing 1 is provided with an air inlet cavity 2. A first filter screen 201 is clamped and installed at the external opening of the air inlet cavity 2. A vibration frame 204 is installed at the internal opening of the air inlet cavity 2. A second filter screen 205 is fixedly installed on the frame body of the vibration frame 204. A cold water pipe 206 is installed inside the second filter screen 205. The first filter screen 201 and the second filter screen 205 perform double filtration on the externally introduced air flow. A vibration motor 5 is fixedly installed on one side of the vibration frame 204. A dust collection box 3 is slidably connected to the bottom of the fan housing 1 near the air inlet cavity 2. The dust collection box 3 includes an outer air guide plate 301. A high-pressure fan 6 is fixedly installed at the center of the inner cavity of the fan housing 1.

[0033] The inside of the air inlet cavity 2 is of a quadrangular pyramid structure. An outer air guide plate 301 is fixedly installed at an angle of 45° on the bottom of the air inlet cavity 2 near the first filter screen 201. A leakage port 302 communicating with the dust collection box 3 is opened at the bottom of the side where the outer air guide plate 301 forms an angle with the air inlet cavity 2. An inner air guide plate 202 close to the outer air guide plate 301 is fixedly installed on the inclined inner wall of the air inlet cavity 2. The opening of the angle of the outer air guide plate 301 faces the inner air guide plate 202. A gap of 2 - 4 cm is provided between the inner air guide plate 202 and the bottom inclined surface of the air inlet cavity 2.

[0034] A rubber sleeve 203 for sealing connection with the inner inclined surface of the air inlet cavity 2 is provided at the edge of the frame body of the vibration frame 204. The second filter screen 205 is installed and fixed in the middle of the frame body of the vibration frame 204 close to the air inlet cavity 2. Multiple groups of cold water pipes 206 are fixedly installed inside the second filter screen 205. Water pipes 207 for connecting with a water tank 8 and a return water cavity 801 are provided at both ends of the cold water pipe 206.

[0035] An eccentric wheel group 501 is provided at the output end of the vibration motor 5. A transmission rod 502 connected to the eccentric wheel group 501 is provided on the side of the vibration frame 204. Multiple groups of spring members 208 are symmetrically arranged up and down on both sides of the vibration frame 204, and the spring members 208 are connected to the inside of the fan housing 1.

[0036] The first filter screen 201 and the second filter screen 205 perform double filtration on the externally introduced air flow. The vibration motor 5 drives the vibration frame 204 to vibrate at a high frequency, facilitating the shaking off of the dust particles intercepted on the second filter screen 205, which slide down along the inclined bottom wall of the air inlet cavity 2 into the dust collection box 3, realizing continuous dust collection and maintaining the filtering performance of the second filter screen 205. Multiple groups of cold water pipes 206 are arranged inside the second filter screen 205, used to contact the external air and perform preliminary heat exchange to reduce the temperature of the external air, which helps to efficiently cool the inside of the high-voltage frequency converter.

[0037] Embodiment Two:

[0038] This embodiment is used to solve the problem that the filter structure of the inverter's built-in air inlet is simple, dust is easily accumulated after long-term use, resulting in low air intake efficiency and unsatisfactory filtering effect. A large amount of conductive dust accumulates inside the high-voltage inverter, and the internal components of the inverter are easily damaged by insulation breakdown; the air in some areas is relatively humid, and condensation is easily generated when cold and hot air flows come into contact, causing short circuits in the internal components of the high-voltage inverter.

[0039] See also Figure 1 , Figure 3 , Figure 5 , Figure 6 As shown, a cooling fan with a primary fan high-voltage inverter in this embodiment includes a high-pressure fan 6 including a third filter 601, an inverter air inlet cover 603 is installed side by side on the side of the third filter 601, an air inlet valve 604 and a first air outlet valve 605 are fixedly installed on the cover surface of the inverter air inlet cover 603, an inverter exhaust cover 607 is installed side by side on the side of the inverter air inlet cover 603, and a water tank 8 is installed side by side on the side of the inverter exhaust cover 607.

[0040] A hole 209 connected to the high-pressure fan 6 is provided in the middle of the vibration frame 204, and a rubber sleeve 203 is sealed on the edge of the hole 209. The third filter 601 is fixedly installed on the outer shell air outlet of the high-pressure fan 6. Multiple groups of water-gas separators 7 are fixedly installed on both sides of the third filter 601. A cold air pipe 701 connected to the third filter 601 and the inverter air inlet cover 603 is provided on the side outer wall of the water-gas separator 7. A drainage pipe 702 connected to the return water chamber 801 is provided at the bottom of the water-gas separator 7.

[0041] An air intake valve 604 connected to the cold air pipe 701 is provided at the top of the inverter air intake hood 603, a cold air branch pipe 609 connected to the heat exchange mechanism 9 is installed on the side wall of the inverter air intake hood 603, a plurality of groups of limit blocks 606 are installed in the inner cavity of the inverter air intake hood 603, a second air outlet valve 608 connected to the heat exchange mechanism 9 is installed on the side wall of the inverter exhaust hood 607, and the inverter air intake hood 603 is connected to the bottom of the inverter exhaust hood 607.

[0042] The third filter 601 further purifies and filters the external air; the water vapor separator separates the excess water in the purified air to avoid condensation caused by the contact and fusion of cold and hot air flows in the high-voltage inverter.

[0043] Embodiment three:

[0044] This embodiment is used to solve the problem that after water-cooling heat exchange, the temperature of the water exchanged water continues to rise and the autonomous cooling is slow.

[0045] See also Figure 1 , Figure 7As shown in the figure, a cooling fan with a primary air fan high-voltage frequency converter in this embodiment includes a water tank 8 including a return water chamber 801. A heat exchange mechanism 9 is fixedly installed at the top of the return water chamber 801. The heat exchange mechanism 9 includes a heat insulation pipe 902. On both sides of the heat insulation pipe 902, multiple groups of heat dissipation fins 901 are fixedly installed. One end of the heat exchange mechanism 9 is fixedly installed with an exhaust port 10.

[0046] A heat insulation layer 804 is embedded in the inner wall of the return water chamber 801. A water filter screen 802 is installed on the bottom of the inner cavity of the return water chamber 801. A heat conduction fin 805 connected to the heat dissipation fin 901 is installed at the top of the inner cavity of the return water chamber 801. A circulating water pump 803 connected to the water delivery pipe 207 is fixedly installed on one side of the inner cavity of the water tank 8. The bottom of the return water chamber 801 is communicated with the water tank 8.

[0047] The heat insulation pipe 902 is communicated with the second air outlet valve 608. The heat insulation pipe 902 is arranged at the center of the inner cavity of the heat exchange mechanism 9. Multiple groups of heat dissipation fins 901 are symmetrically arranged on the inner cavity wall of the heat exchange mechanism 9. Multiple groups of cold air ports 903 are fixedly installed on the inner wall of the heat exchange mechanism 9 close to the frequency converter exhaust hood 607. The multiple groups of cold air ports 903 are connected to the cold air branch pipe 609. The exhaust port 10 is fixed at the bottom of the outer wall on one side of the fan housing 1 away from the air inlet chamber 2. Maintenance covers 4 are fixedly installed on both sides of the outer wall of the fan housing 1.

[0048] The return water chamber 801 guides and transfers the heat of the warm water to the heat dissipation fins 901 through the heat conduction fin 805. Cold air is blown out through the cold air ports to assist the heat on the heat dissipation fins 901 to be transported into the exhaust port 10 along the inner cavity of the heat exchange mechanism 9. At the same time, the water filter screen 802 continuously filters the return water in the return water chamber 801.

[0049] As Figures 1-7 shown, the working process and principle of the present invention are as follows:

[0050] Step 1: During use, the high-pressure blower 6 starts to operate, drawing in external air through the intake cavity 2. The outer air guide plate 301 and the inner air guide plate 202 are used in combination to guide the external air flow to enter from the area above the middle of the intake cavity 2. The first filter screen 201 and the second filter screen 205 double-filter the externally introduced air flow. The first filter screen 201 is a wire mesh with a mesh aperture size of 40 mesh, and the second filter screen 205 is a nylon mesh with a mesh aperture size of 300 mesh. The vibration motor 5 operates synchronously, driving the vibration frame 204 to vibrate at a high frequency through the eccentric wheel group 501 and the transmission rod 502. The vibration frame 204 rebounds and reciprocates through the spring member 208, facilitating the shaking off of the dust particles intercepted on the second filter screen 205. The dust particles slide down along the inclined wall at the bottom of the intake cavity 2 and fall into the dust collection box 3 through the leakage opening 302, realizing continuous dust collection and maintaining the filtering performance of the second filter screen 205. A plurality of cold water pipes 206 are arranged inside the second filter screen 205, and the circulating water pump 803 continuously transports the cold water in the water tank 8 through the cold water pipes 206 to contact the external air and conduct preliminary heat exchange to reduce the temperature of the external air, which helps to efficiently cool the inside of the high-voltage inverter;

[0051] Step 2: The high-pressure blower 6 extracts the air in the intake cavity 2 through the hole 209 and transports the purified external air to the third filter screen 601 for further detailed purification and filtration to remove the fine impurity particles in the cooled air. The air that has been multi-purified in the third filter screen 601 is transported to the water-air separator 7 (model: WA-400RE) through the cold air pipe 701. The material of the third filter screen 601 is ultra-fine glass fiber with a mesh aperture size of 400 mesh. The water-air separator separates the excess water in the purified air, and then it is transported to the inverter air intake hood 603 through the cold air pipe 701 and guided into the high-voltage inverter. At the same time, the air pressure inside the high-voltage inverter is pushed into the inverter exhaust hood 607, realizing the air flow circulation inside the high-voltage inverter and avoiding the condensation phenomenon caused by the contact and mixing of the hot and cold air flows inside the high-voltage inverter;

[0052] Step 2: The inverter exhaust hood 607 transports the used hot air to the heat insulation pipe 902 through the second exhaust valve 608, and the hot air enters the exhaust port 10 along the heat insulation pipe 902. The warm water with a certain amount of heat generated by the heat exchange in the cold water pipe 206 flows back to the return water cavity 801 through the water delivery pipe 207. The return water cavity 801 guides and transfers the heat of the warm water to the heat dissipation fin 901 through the heat conduction sheet 805. The inverter air intake hood 603 transports a part of the cold air to the cold air branch pipe 609 through the first air outlet valve 605, and the cold air branch pipe 609 blows the cold air to the heat dissipation fin 901 through the cold air port 903, assisting the heat on the heat dissipation fin 901 to be transported into the exhaust port 10 along the inner cavity of the heat exchange mechanism 9. At the same time, the water filter screen 802 continuously filters the return water in the return water cavity 801.

[0053] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent replacements or changes, shall be covered by the protection scope of the present invention.

Claims

1. A cooling fan with a high-voltage frequency converter for a primary air fan, comprising a fan housing (1), characterized in that, One end of the fan housing (1) is provided with an air inlet chamber (2). A first filter screen (201) is snap-fitted and installed at the external opening of the air inlet chamber (2). A vibration frame (204) is erected and installed at the internal opening of the air inlet chamber (2). A second filter screen (205) is fixedly installed on the frame body of the vibration frame (204). A cold water pipe (206) is installed inside the second filter screen (205). A vibration motor (5) is fixedly installed on one side of the vibration frame (204). A dust collection box (3) is slidably connected to the bottom of the fan housing (1) near the air inlet chamber (2). The dust collection box (3) includes an outer air guide plate (301). A high-pressure fan (6) is fixedly installed at the center of the inner cavity of the fan housing (1); The high-pressure fan (6) includes a third filter screen (601). A frequency converter air inlet hood (603) is installed side by side on the side of the third filter screen (601). An air inlet valve (604) and a first air outlet valve (605) are fixedly installed on the surface of the hood body of the frequency converter air inlet hood (603). A frequency converter exhaust hood (607) is installed side by side on the side of the frequency converter air inlet hood (603). A water tank (8) is installed side by side on the side of the frequency converter exhaust hood (607); The water tank (8) includes a return water chamber (801). A heat exchange mechanism (9) is fixedly installed at the top of the return water chamber (801). The heat exchange mechanism (9) includes a heat insulation pipe (902). Multiple groups of heat dissipation fins (901) are fixedly installed on both sides of the heat insulation pipe (902). An exhaust port (10) is fixedly installed at one end of the heat exchange mechanism (9); The inside of the air inlet chamber (2) is of a quadrangular pyramid structure. An outer air guide plate (301) is fixedly installed at a 45° angle on the bottom side of the air inlet chamber (2) near the first filter screen (201). A leakage port (302) communicating with the dust collection box (3) is opened at the bottom of the side where the outer air guide plate (301) forms an angle with the air inlet chamber (2). An inner air guide plate (202) close to the outer air guide plate (301) is fixedly installed on the inner inclined wall of the air inlet chamber (2). The angle opening of the outer air guide plate (301) faces the inner air guide plate (202). A gap of 2 - 4 cm is provided between the inner air guide plate (202) and the bottom inclined surface of the air inlet chamber (2).

2. The cooling fan with a primary fan high-voltage frequency converter according to claim 1, wherein, A rubber sleeve (203) for sealing connection with the inner inclined surface of the air inlet chamber (2) is provided at the edge of the frame body of the vibration frame (204). The second filter screen (205) is erected and fixed in the middle of the frame body of the vibration frame (204) on the side close to the air inlet chamber (2). Multiple groups of cold water pipes (206) are fixedly installed inside the second filter screen (205). Water pipes (207) for connecting the water tank (8) and the return water chamber (801) are provided at both ends of the cold water pipe (206).

3. The cooling fan with a primary fan high-voltage frequency converter according to claim 1, characterized in that, An eccentric wheel group (501) is provided at the output end of the vibration motor (5). A transmission rod (502) connected to the eccentric wheel group (501) is provided on the side of the vibration frame (204). Multiple groups of spring members (208) are symmetrically arranged up and down on both sides of the vibration frame (204), and the spring members (208) are connected to the inside of the fan housing (1).

4. A cooling fan with a primary air blower high-voltage frequency converter according to claim 1, characterized in that, In the middle of the frame body of the vibration frame (204), there is a hole (209) connected to the high-pressure blower (6), and a rubber sleeve (203) is hermetically sleeved on the edge of the hole (209). The third filter screen (601) is fixedly installed on the air outlet of the outer shell of the high-pressure blower (6). On both sides of the third filter screen (601), multiple water-air separators (7) are fixedly installed. On the outer wall of the side of the water-air separator (7), there is a cold air pipe (701) communicating with the third filter screen (601) and the intake hood (603) of the frequency converter. At the bottom of the water-air separator (7), there is a drain pipe (702) connected to the return water chamber (801).

5. A cooling fan with a primary air fan high-voltage frequency converter according to claim 1, characterized in that, At the top of the intake hood (603) of the frequency converter, there is an intake valve (604) connected to the cold air pipe (701). On the side wall of the hood body of the intake hood (603) of the frequency converter, there is a cold air branch pipe (609) connected to the heat exchange mechanism (9). In the inner cavity of the intake hood (603) of the frequency converter, multiple limiting blocks (606) are installed. On the side wall of the hood body of the exhaust hood (607) of the frequency converter, there is a second air outlet valve (608) connected to the heat exchange mechanism (9). The bottom of the intake hood (603) of the frequency converter communicates with the bottom of the exhaust hood (607) of the frequency converter.

6. A cooling fan with a primary fan high-voltage frequency converter according to claim 1, characterized in that, An insulating layer (804) is embedded in the inner wall of the return water chamber (801). A water filter screen (802) is installed on the bottom of the inner cavity of the return water chamber (801). On the top of the inner cavity of the return water chamber (801), there is a heat conducting sheet (805) connected to the heat sink (901). On one side of the inner cavity of the water tank (8), a circulating water pump (803) connected to the water delivery pipe (207) is fixedly installed. The bottom of the return water chamber (801) communicates with the water tank (8).

7. A cooling fan with a primary fan high-voltage frequency converter according to claim 1, characterized in that, The heat insulating pipe (902) communicates with the second air outlet valve (608). The heat insulating pipe (902) is installed at the center of the inner cavity of the heat exchange mechanism (9). Multiple heat sinks (901) are symmetrically arranged on the inner cavity wall of the heat exchange mechanism (9). On the inner wall of the heat exchange mechanism (9) close to the exhaust hood (607) of the frequency converter, multiple cold air outlets (903) are fixedly installed. Multiple cold air outlets (903) are connected to the cold air branch pipe (609). The exhaust port (10) is fixed at the bottom of the outer wall of the blower housing (1) away from the intake chamber (2). On both sides of the outer wall of the blower housing (1), inspection covers (4) are fixedly installed.

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