High-temperature-resistant explosion-proof fan
By designing the heat dissipation channel and negative pressure fan in the negative pressure bracket in the high-temperature explosion-proof fan, the heat dissipation structure of the rear cover case and gap, and the backlash cleaning mechanism of the filter ring network, the problem of short running time of the motor in a high-temperature environment is solved, and longer running time and higher high-temperature resistance are achieved.
Patent Information
- Application Number
- CN202411792749.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-07
- Publication Date
- 2025-03-18
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The motors in existing high-temperature resistant and explosion-proof fans have short running time in high-temperature environments and are prone to failure due to long-term high temperatures. There is a lack of high-temperature tolerance standards for motors for fire-fighting and smoke exhaust fans.
A high-temperature explosion-proof fan is designed, and a heat dissipation channel and a negative pressure fan are installed in the negative pressure bracket. The downforce is formed through the negative pressure suction cup, and the relatively low-temperature air is sucked in and blown to the motor along the heat dissipation channel to provide cooling and heat dissipation; the rear cover shell and gap are provided at the rear end of the motor, and the heat dissipation air port is connected to the gap, and the outer wall of the motor is wrapped with relatively low-temperature wind power to cool down. A filter ring network is provided between the motor and the rear cover shell to filter dust in the air and improve the operating time of the fan through backflush cleaning.
Provide effective cooling and heat dissipation for the motor in a high-temperature environment, extend the fan's running time, improve the fan's high-temperature resistance and stability, and enhance the fan's explosion-proof performance and flexibility.
Smart Images
Figure CN119641674A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of fans, and in particular to a high temperature resistant and explosion proof fan. Background Art
[0002] High temperature resistant explosion-proof fans are usually used for fire ventilation and smoke exhaust in buildings. According to regulations, fire smoke exhaust fans used in buildings should operate continuously for 30 minutes without abnormal phenomena when the airflow is not less than 280℃. During the test, when the airflow passes through the axial flow fan, the motor set in the center of the body needs to operate normally in a high temperature environment. High temperature will cause motor failure, which is the main reason for the low pass rate of such fans. However, there is no evaluation of the high temperature resistance level of the motor at present, only the insulation level of the motor is set. The insulation level of the motor refers to the heat resistance level of the insulating material used, which is divided into A, E, B, F, and H levels. Among these levels, the highest allowable temperature is 180℃, that is, it can operate normally within the temperature, and it will fail if it is higher than this temperature for a long time. Therefore, since there is no corresponding standard for motors for fire smoke exhaust fans, manufacturers are more arbitrary in using motors, and the motors themselves have shortcomings, resulting in the exhaust fan. There may be a congenital hidden danger of weak high temperature resistance when the motor is produced. For example, in a high temperature environment, after the standard of running for 30 minutes is achieved, the motor will be more likely to fail due to excessively high temperature for too long.
[0003] In a fire situation, in order to build an efficient and complete smoke and heat dissipation channel, it is often necessary to carry a number of mobile fire-fighting fans into the affected building to set up smoke exhaust and heat dissipation channels. At this time, the fans inside the high-temperature building are in a high-temperature operating environment. Unlike fans far away from the high-temperature area, they cannot draw cold air for cooling. As a result, the working time of the fans inside the high-temperature building cannot be guaranteed accordingly, and it is easy to encounter a situation where 30 minutes is the maximum operating time.
[0004] In summary, there is an urgent need for a high-temperature resistant and explosion-proof fan that can provide cooling and heat dissipation for the motor in the smoke exhaust fan in a high-temperature environment and increase the operating time of the original fan in an extreme environment. Summary of the invention
[0005] In view of the problem that the motor in the fire smoke exhaust fan in the prior art is not resistant to high temperatures, a high-temperature resistant and explosion-proof fan is proposed, which can provide cooling and heat dissipation for the motor in the smoke exhaust fan in a high-temperature environment and increase the operating time of the original fan in an extreme environment.
[0006] In order to solve the above problems, the technical solution of the present invention is:
[0007] A high-temperature resistant and explosion-proof fan comprises a wind drum, a motor, a mobile frame, and a negative pressure frame; the wind drum is arranged on the mobile frame, the motor is arranged in the wind drum, and the motor is provided with a smoke exhaust fan; one end of the negative pressure frame is connected to the wind drum, and the other end is provided with a negative pressure suction cup, and the diameter of the negative pressure suction cup is larger than the diameter of the negative pressure frame; a heat dissipation channel is provided in the negative pressure frame, a negative pressure fan is provided in the heat dissipation channel, and the heat dissipation outlet is provided at one end of the heat dissipation channel, and the heat dissipation outlet is opposite to the motor.
[0008] As a preferred technical solution, the motor is provided with a rear cover shell, one end of the rear cover shell is provided with an opening, wherein the direction of the opening is toward the direction of smoke exhaust, the rear cover shell and the outer wall of the motor have a gap, the gap is connected to the inside of the motor, and the heat dissipation outlet is connected to the gap.
[0009] As a preferred technical solution, a heat dissipation strip is provided on the outer wall of the motor.
[0010] As a preferred technical solution, a filter ring is provided between the motor and the rear cover shell.
[0011] As a preferred technical solution, a portion of the filter ring net is directly opposite to the heat dissipation vent, and a portion is oriented toward the direction of smoke exhaust.
[0012] As a preferred technical solution, the filter ring rotates along the rear cover shell and the motor.
[0013] As a preferred technical solution, a coarse filter is provided in the heat dissipation channel.
[0014] As a preferred technical solution, the movable frame is provided with a pull rod and movable wheels.
[0015] As a preferred technical solution, the movable frame can be raised and lowered; the negative pressure support can be raised and lowered.
[0016] Beneficial effects of the present invention:
[0017] 1. The high-temperature resistant explosion-proof fan described in the present invention has a heat dissipation channel in its negative pressure bracket, a negative pressure fan in the heat dissipation channel, a negative pressure suction cup at the bottom of the negative pressure bracket, and one end of the heat dissipation channel in the negative pressure bracket is located in a relatively low temperature area close to the ground. The negative pressure fan therein blows relatively low-temperature air along the heat dissipation channel toward the motor body, thereby providing a relatively low-temperature heat dissipation function for the motor in a high-temperature environment. The sucked air flows in along the bottom of the negative pressure suction cup, and a downward pressure is formed on the negative pressure suction cup through the flow velocity difference, thereby providing stronger stability for the explosion-proof fan and improving the flexibility of the fan placement.
[0018] 2. The high temperature resistant explosion-proof fan of the present invention has a rear cover shell at the rear end of the motor, and the rear cover shell is sleeved on the motor. There is a gap between the rear cover shell and the outer wall of the motor, and the gap is connected to the internal space of the motor. The heat inside the motor can be brought out through the gap. The heat dissipation vent is connected to the gap. Through the gap, relatively low temperature wind can flow along the gap to wrap around the outer wall of the motor to provide a cooling effect.
[0019] 3. The high-temperature resistant explosion-proof fan of the present invention has a filter ring net between its motor and the rear cover shell. The filter ring net can filter dust and the like in the air entering the motor. A portion of the filter ring net is directly opposite to the heat dissipation vent, and a portion is directed toward the direction of smoke exhaust. The wind blown out of the heat dissipation vent enters the interior of the fan through the filter ring net directly opposite to it, and the dust gradually gathers on the surface of the filter ring net section. The filter ring net can rotate along the rear cover shell and the motor, so that the position of the part of the filter ring net carrying dust changes, and it gradually rotates to the direction of smoke exhaust. Since the air is discharged from the inside of the motor through the filter ring net along the direction of smoke exhaust, the dust attached to the filter ring net is recoil cleaned, which greatly improves the operation time of the fan. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 A three-dimensional diagram of the high temperature resistant explosion-proof fan of the present invention Figure 1 ;
[0021] Figure 2 A three-dimensional diagram of the high temperature resistant explosion-proof fan of the present invention Figure 2 ;
[0022] Figure 3 It is a partial schematic diagram of the high temperature resistant explosion-proof fan of the present invention;
[0023] Figure 4 This is a schematic diagram of the high temperature resistant explosion proof fan of the present invention, its liftable movable frame and negative pressure support;
[0024] Figure 5 It is a partial schematic diagram of the high temperature resistant explosion-proof fan of the present invention provided with a rear cover shell;
[0025] Figure 6 It is a partial cutaway view of the high temperature resistant explosion proof fan of the present invention provided with a rear cover shell;
[0026] Figure 7 It is a partial schematic diagram of the high temperature resistant explosion proof fan of the present invention provided with another rear cover shell;
[0027] Figure 8 It is a partial cross-sectional view of the high temperature resistant explosion-proof fan of the present invention provided with another rear cover shell;
[0028] Fig. 9A schematic diagram of the cooperation between the motor and the filter ring network of the high temperature resistant explosion-proof fan of the present invention with another rear cover shell;
[0029] Fig.10 A schematic diagram of a rear cover shell and a negative pressure bracket of the high temperature resistant explosion-proof fan of the present invention provided with another rear cover shell;
[0030] Fig.11 It is a cross-sectional schematic diagram of the coordination of the motor, the filter ring net and the rear cover shell of the high temperature resistant explosion-proof fan of the present invention with another rear cover shell;
[0031] Fig.12 The present invention is a schematic diagram of the airflow direction in the rear cover of the high temperature resistant explosion-proof fan of the present invention which is provided with another rear cover.
[0032] The reference numerals and components involved in the drawings are as follows:
[0033] 1. Blower; 2. Motor; 3. Moving frame; 4. Negative pressure bracket; 5. Back cover shell; 6. Gap; 7. Filter ring net; 21. Smoke exhaust fan; 22. Heat dissipation strip; 23. Output shaft; 24. Rolling shaft; 31. Moving wheel; 32. Pull rod; 33. Pin; 34. Blocking piece; 41. Negative pressure suction cup; 42. Air inlet; 43. Heat dissipation outlet; 44. Negative pressure fan; 51. Guide rail groove; 71. Guide rail edge. DETAILED DESCRIPTION
[0034] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are only 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 ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0035] In order to better understand the high temperature resistant explosion-proof fan provided by the present embodiment, the following first briefly introduces the existing high temperature resistant explosion-proof fan. The existing high temperature resistant explosion-proof fan refers to the one used in fire smoke exhaust. By setting up multiple high temperature resistant explosion-proof fans in places with thick smoke, a smoke exhaust channel is constructed to exhaust the smoke to the outside, so as to eliminate smoke obstacles for fire rescue. Therefore, it is necessary to carry the high temperature resistant explosion-proof fan into the high temperature smoke for installation. When exhausting smoke, it is usually necessary to fix these high temperature resistant explosion-proof fans at a high place, which is conducive to providing a better field of vision for the lower part. However, since the air will not only expand after being heated, but also generate a certain buoyancy, so that the hot air is at the top, resulting in a relatively worse working environment for the high temperature resistant explosion-proof fan. At this time, the heat-resistant operation of the motor is greatly tested. The high temperature resistant explosion-proof fan described in the present invention aims to make full use of the on-site environment and provide a relatively low temperature working environment for the motor during work, so as to increase the running time of the fan in this high temperature environment. Its structure is described as follows:
[0036] Please see attached Figure 1 , Figure 2 ; Figure 1 A three-dimensional diagram of the high temperature resistant explosion-proof fan of the present invention Figure 1 ; Figure 2 A three-dimensional diagram of the high temperature resistant explosion-proof fan of the present invention Figure 2 A high temperature resistant explosion-proof fan comprises a wind drum 1, a motor 2, a moving frame 3, and a negative pressure support 4; the wind drum 1 is a hollow cylindrical structure with two ends connected, a motor 2 is arranged at the center of the cylinder, the motor 2 is mounted on a horizontal baffle in the wind drum 1, a smoke exhaust fan 21 is arranged on the motor 2, and the smoke exhaust fan 21 is an axial flow fan for exhausting smoke, a moving frame 3 is arranged on the outside of the wind drum 1, a moving wheel 31 is arranged at the bottom of the moving frame 3, and the moving wheel 31 is only installed on one side to avoid movement when the fan is working, and a pull rod 32 is also arranged on the moving frame 3, which tilts up the side where the moving wheel 31 is not arranged, and the high temperature resistant explosion-proof fan can be moved by the pull rod 32 and the moving wheel 31.
[0037] The negative pressure bracket 4 is also mounted on the wind drum 1, and a negative pressure suction cup 41 is provided at the bottom of the negative pressure bracket 4. The diameter of the negative pressure suction cup 41 is larger than that of the negative pressure bracket 4. The negative pressure bracket 4 is a hollow heat dissipation channel. One end of the heat dissipation channel is opened as an air inlet 42 at the negative pressure suction cup 41, and the other end is a heat dissipation vent 43 facing the motor 2. Please refer to the attached Figure 3 , Figure 3It is a partial schematic diagram of the high-temperature resistant and explosion-proof fan of the present invention; preferably, in the present embodiment, the air inlet 42 of the heat dissipation channel is a circular opening structure, the heat dissipation air outlet 43 is a rectangular opening structure opposite to the motor 2, and the shape of the heat dissipation channel gradually transitions from a coarser circular opening to a rectangular opening, and a negative pressure fan 44 is set up in the circular area of the heat dissipation channel, and the negative pressure fan 44 is used to supply air from the air inlet 42 at the negative pressure suction cup 41 to the heat dissipation air outlet 43.
[0038] It should be noted that the air inlet 42 on the negative pressure bracket 4 described in the present invention is arranged below the wind drum 1. When in use, the air inlet 42 of the negative pressure bracket 4 and the negative pressure suction cup 41 are located at the bottom of the regional space. Since the air will not only expand after being heated, but also generate a certain buoyancy, the cold air stays below and the hot air is above under this force. Therefore, the high temperature resistant and explosion-proof fan described in the present invention, under the support of the mobile frame 3, makes the wind drum 1 located above the smoke area, which is used to directly construct a smoke exhaust channel for high-temperature smoke. In order to prevent the motor 2 from being unable to work for a long time in a high temperature environment, in the present invention, the negative pressure bracket 4 constructs a heat dissipation channel, and the air inlet 42 of the heat dissipation channel is located below the relatively low temperature of the smoke area. Through the suction of the negative pressure fan 44 in the heat dissipation channel, the cold air below is blown out from the heat dissipation air outlet 43 along the heat dissipation channel, directly providing the motor 2 with a relatively low temperature cold airflow below, thereby improving the working environment temperature of the motor 2.
[0039] Please see attached Figure 4 , Figure 4 The schematic diagram of the high-temperature resistant explosion-proof blower of the present invention is a liftable movable frame and a negative pressure support; at the same time, during operation, the larger the distance between the negative pressure suction cup 41 of the negative pressure support 4 and the wind drum 1, the greater the temperature difference between their respective areas, and the better the cooling effect. In order to take into account convenience, in some embodiments, the movable frame 3 and the negative pressure support 4 both adopt a liftable structure. In this embodiment, the movable frame 3 is a sleeve-type lift layer by layer and is fixed by a bayonet 33. Preferably, by setting a plurality of groups of fixing holes (not shown in the figure), the height can be flexibly adjusted by the bayonet 33. Correspondingly, the negative pressure support 4 is also a sleeve-type sleeve lift. A high-temperature resistant sealing ring is used to seal between the sleeve, and the friction between the sleeves can be relied on to achieve relative stability between the sleeves. In this embodiment, a blocking piece 34 is also provided at the bottom of the movable frame 3, and the blocking piece 34 can provide a limit for the negative pressure suction cup 41 to prevent the negative pressure suction cup 41 from touching the bottom and blocking the air inlet 42. It should be noted that the raised movable frame 3 will have unstable supporting pressure, and under the suction provided by the negative pressure fan 44, the pressure below the negative pressure suction cup 41 is less than the pressure above the negative pressure disc 41, so that the negative pressure suction cup 41 is used to provide downward pressure for the high-temperature resistant explosion-proof fan, thereby effectively improving the working stability.
[0040] Please see attached Figure 5 , Attachment Figure 6 , Figure 5 It is a partial schematic diagram of the high temperature resistant explosion proof fan of the present invention provided with a rear cover shell. Figure 6 is a partial cross-sectional view of the high temperature resistant explosion-proof fan of the present invention with a rear cover; in some preferred embodiments, in order to make the wind at the bottom of the heat dissipation vent 43 cover the entire motor 2, see the attached Figure 5 , Figure 5 It is a partial cutaway schematic diagram of the high-temperature resistant explosion-proof fan of the present invention provided with a rear cover shell. In the high-temperature resistant explosion-proof fan of the present invention, the rear cover shell 5 of the motor 2 is suspended and supported and sleeved on the rear end of the motor 2, that is, there is a gap 6 between the inner wall of the rear cover shell 5 and the outer wall of the motor 2, the negative pressure bracket 4 is connected to the rear cover shell 5, and the heat dissipation vent 43 is arranged on the rear cover shell 5, wherein the heat dissipation channel in the negative pressure bracket 4 is connected to the gap 6 between the rear cover shell 5 and the outer wall of the motor 2, and the heat dissipation channel is gradually narrowed to match the size of the heat dissipation vent 43, so that the wind force is gathered in the gap 6 in the rear cover shell 5. Preferably, the gap 6 is connected to the inside of the motor 2, that is, the wind flowing out of the heat dissipation vent 43 can The smoke enters the motor 2 for heat dissipation and cooling. It should be understood that the smoke exhaust direction blows forward from the rear cover shell 5 along the motor 2. In order to prevent the high-temperature airflow from the upper layer from entering the motor 2, the rear cover shell 5 is a complete shell on which no heat dissipation holes are arranged. Preferably, a heat dissipation strip 22 is provided on the motor 2. The heat dissipation strip 22 is a plurality of long strips arranged around the motor 2 along the axis of the motor 2. One end of the heat dissipation strip 22 is connected to the gap 6 or is located in the gap 6, so that the lower layer of cold air input into the gap 6 will take away the heat of the motor 2 along the heat dissipation strip 22. Preferably, since the heat dissipation channel gradually becomes smaller from the air inlet 42 to the heat dissipation outlet 43, a coarse filter is provided in the heat dissipation channel to prevent the heat dissipation channel from being blocked.
[0041] It should be noted that: the high-temperature explosion-proof fan of the present invention located in the smoke exhaust area, its wind drum 1 is located in the high-temperature smoke area of the upper layer, and the air inlet 42 of the negative pressure bracket 4 under the wind drum 1 is located in the low-temperature area of the lower layer. Under the rotation of the smoke exhaust fan 21, the high-temperature smoke is sucked in from the rear cover shell 5 of the motor 2 in the wind drum 1 and blown out in front of the smoke exhaust fan 21. The negative pressure fan 44 in the heat dissipation channel sucks in the cold air from the lower layer from the air inlet 42, and the cold air enters the gap 6 in the rear cover shell 5 through the heat dissipation air outlet 43, wherein a part of the cold air enters the interior of the motor 2, and a part enters between the heat dissipation strips 22 of the motor 2, to provide heat dissipation for the motor 2; at the same time, driven by the smoke exhaust fan 21, the airflow moves along the axial direction of the motor 2, changing the flow direction of the cold air coming out of the heat dissipation channel, and at the same time, under the protection of the rear cover shell 5, the high-temperature smoke is prevented from entering the interior of the motor 2.
[0042] Please see attached Figure 7 , Figure 8 , Figure 7 It is a partial schematic diagram of the high temperature resistant explosion proof fan of the present invention with another rear cover shell. Figure 8 FIG. 1 is a partial cross-sectional view of the high temperature resistant explosion-proof fan of the present invention with another rear cover shell; in some preferred embodiments, in order to filter the air in the heat dissipation channel and prevent the airflow carrying a large amount of dust from entering the interior of the motor 2, while avoiding the clogging problem of the filter area caused by dust, a filter ring net 7 is provided between the motor 2 and the rear cover shell 5 of the high temperature resistant explosion-proof fan of the present invention, that is, the filter ring net 7 is installed in the gap 6 to isolate the dust in the airflow entering the interior of the motor 2 from the gap 6; please refer to the attached Figure 8 , Figure 8 The present invention is a schematic diagram of the cooperation between the motor and the filter ring net of the high-temperature resistant explosion-proof fan with another rear cover shell; the filter ring net 7 is an annular filter mesh belt, and guide rail edges 71 are provided on both sides of the filter ring net 7, and the guide rail edges 71 and the body of the filter ring net 7 are in a T-shaped structure; preferably, since the heat dissipation outlet 43 is located below the motor 2, in order to facilitate the air flow to directly pass through the filter ring net 7 into the motor 2, the filter ring net 7 opposite to the heat dissipation outlet 43 is arranged axially opposite to the heat dissipation outlet 43, and in order to allow the dust attached to the filter ring net 7 to be brought out by the smoke exhaust fan 21, in this embodiment, the filter ring net 7 above the motor 2 is perpendicular to the axial direction of the motor 2, and the filter ring net 7 keeps circulating rotation.
[0043] Please see attached Fig. 9 , Fig.10 , Fig.11 , Fig. 9 This is a schematic diagram of the cooperation between the motor and the filter ring network of the high temperature resistant explosion-proof fan of the present invention with another rear cover shell. Fig.10 It is a schematic diagram of a rear cover shell and a negative pressure bracket of the high temperature resistant explosion-proof fan of the present invention with another rear cover shell, Fig.11The present invention is a schematic cross-sectional diagram of the high-temperature resistant explosion-proof fan with another rear cover shell, wherein the fan has a motor, a filter ring net and a rear cover shell. Specifically, a guide rail groove 51 adapted to the guide rail edge 71 is provided on the rear cover shell 5, and in the lower layer of the rear cover shell 5, the guide rail groove 51 is located on the rear wall of the rear cover shell 5, and in the upper layer of the rear cover shell 5, the guide rail groove 51 is located on the inner wall of the side edge of the rear cover shell 5, that is, the guide rail groove 51 on the rear cover shell 5 is gradually twisted along the rear wall of the rear cover shell 5 to transition to the side wall, and then to the rear wall through the side wall, forming a loop structure connected end to end; correspondingly, the guide rail groove 51 corresponding to the other guide rail edge 71 is located at the rear end of the motor 2, wherein, in the lower layer of the motor 2, the guide rail groove 51 is perpendicular to the rear wall of the motor 2, and then gradually twists to be perpendicular to the outer wall of the motor 2, through the guide rail edge 71 and the guide rail groove 51. The filter ring net 7 is limited by the groove 51, and the lower layer is parallel to the axial direction of the motor 2, the upper layer is perpendicular to the axial direction of the motor 2, and the middle transition is twisted. In order to make the filter ring net 7 move along the guide groove 51, the rear end of the motor 2 also extends an output shaft 23, and a rolling shaft 24 is arranged between the motor 2 and the rear cover shell 5. The output shaft 23 can be connected to the rolling shaft 24 through a high-temperature resistant chain, a conveyor belt or a gear set. There are several rolling shafts 24. The rolling shaft 24 in the lower layer of the motor 2 is parallel to the axial direction of the motor 2, and the rolling shaft 24 in the upper layer of the motor 2 is perpendicular to the outer wall of the motor 2. The rolling shaft 24 contacts the body of the filter ring net 7 and provides support and tensioning force for it. Driven by the rolling shaft 24, the filter ring net 7 can slide along the guide groove 51.
[0044] Please see attached Fig.12 , Fig.12The figure is a schematic diagram of the airflow direction in the rear cover shell of the high-temperature resistant explosion-proof fan of the present invention which is provided with another rear cover shell, and the arrow in the figure shows the flow direction of part of the airflow going out from the heat dissipation vent 43; the method of using the high-temperature resistant explosion-proof fan of the present invention: move the high-temperature resistant explosion-proof fan of the present invention to the area to be exhausted, and it should be understood that the position and number of the fans are arranged according to the size of the area to construct a smoke exhaust channel, wherein the wind drum 1 of the high-temperature resistant explosion-proof fan is located in the upper area of the area to be exhausted, and the air inlet 42 of the negative pressure bracket 4 is located in the area to be exhausted. the lower area; the smoke exhaust fan 21 is rotated by the motor 2 to guide the high-temperature airflow to flow in front of the motor 2, and the negative pressure fan 44 is rotated to guide the relatively low-temperature airflow at the bottom to flow toward the motor 2, wherein the airflow generated by the negative pressure fan 44 increases the gas flow rate below the negative pressure suction cup 41, providing additional downward force to stabilize the device; the airflow generated by the smoke exhaust fan 21 flows axially along the motor 2, so that the gas flow rate outside the rear cover shell 5 is greater than the gas flow rate inside the rear cover shell 5, and a pressure difference is also generated, so that the gas inside the motor 2 is discharged outward. Therefore, during the operation of the device, the airflow in the heat dissipation channel is initially filtered by the coarse filter and then blown to the heat dissipation vent 43. As the space gradually narrows, the wind speed gradually increases, ensuring that the cold air going out of the heat dissipation vent 43 can wrap the entire motor 2 under the impact and be discharged outward along the motor 2. Among them, a part of the relatively low-temperature airflow coming out of the heat dissipation vent 43 penetrates the filter ring net 7 and enters the interior of the motor 2. When passing through the filter ring net 7, the dust in the airflow is attached to the outer surface of the filter ring net 7. The filter ring net 7 is in a rotating state driven by the output shaft 23. When the filter ring net 7 with dust attached rotates away from the lower layer of the motor 2, it leaves the positive pressure zone provided by the heat dissipation vent 43 and enters the smoke exhaust zone, which is in a negative pressure state. At this time, the airflow penetrates the filter ring net 7 from the inside of the motor 2, that is, a recoil effect is formed on the dust on the filter ring net 7, flushing out the dust on it to prevent blockage, thereby realizing the recycling of the filter ring net 7.
[0045] The high-temperature resistant explosion-proof fan described in the present invention has a heat dissipation channel provided in its negative pressure bracket 4, and a negative pressure fan 44 is provided in the heat dissipation channel. A negative pressure suction cup 41 is provided at the bottom of the negative pressure bracket 4. One end of the heat dissipation channel in the negative pressure bracket 4 is located in a relatively low-temperature area close to the ground. The negative pressure fan 44 therein provides a relatively low-temperature heat dissipation function for the motor 2 in a high-temperature environment by blowing relatively low-temperature air along the heat dissipation channel toward the motor 2 body. The sucked air flows in along the bottom of the negative pressure suction cup 41, and a downward pressure is formed on the negative pressure suction cup 41 due to the flow velocity difference, which provides stronger stability for the explosion-proof fan and improves the flexibility of the fan placement. The high-temperature resistant explosion-proof fan described in the present invention has a rear cover shell 5 at the rear end of the motor 2, and the rear cover shell 5 is sleeved on the motor 2. There is a gap 6 between the rear cover shell 5 and the outer wall of the motor 2, and the gap 6 is connected to the internal space of the motor 2. The heat inside the motor 2 can be brought out through the gap 6. The heat dissipation vent 43 is connected to the gap 6 The fan 2 of the present invention is connected, through the gap 6, the relatively low temperature wind can flow along the gap 6 to wrap the outer wall of the motor 2 to provide a cooling effect; the high temperature resistant explosion-proof fan of the present invention has a filter ring net 7 between the motor 2 and the rear cover shell 5, the filter ring net 7 can filter dust and the like in the air entering the motor 2, a part of the filter ring net 7 is directly opposite to the heat dissipation vent 43, and a part is toward the direction of smoke exhaust, the wind blown out of the heat dissipation vent 43 enters the interior of the click through the filter ring net 7 directly opposite, and the dust gradually gathers on the surface of this section of the filter ring net 7, and the filter ring net 7 can rotate along the rear cover shell 5 and the motor 2, so that the position of the part of the filter ring net 7 carrying dust changes, and gradually rotates to the direction of smoke exhaust, because the air is discharged from the inside of the motor 2 through the filter ring net 7 along the direction of smoke exhaust, the dust attached to the filter ring net 7 is backwashed and cleaned, thereby greatly improving the operation time of the fan.
[0046] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and supplements without departing from the principle of the present invention. These improvements and supplements should also be regarded as the scope of protection of the present invention.
Claims
1. A high temperature resistant explosion-proof fan, characterized in that: It includes an air drum, a motor, a movable frame, and a negative pressure frame; the air drum is arranged on the movable frame, the motor is arranged in the air drum, and the motor is provided with a smoke exhaust fan; one end of the negative pressure frame is connected to the air drum, and the other end is provided with a negative pressure suction cup, and the diameter of the negative pressure suction cup is larger than the diameter of the negative pressure frame; a heat dissipation channel is provided in the negative pressure frame, a negative pressure fan is provided in the heat dissipation channel, and the heat dissipation outlet is provided at one end of the heat dissipation channel, and the heat dissipation outlet is opposite to the motor.
2. The high temperature resistant explosion proof fan according to claim 1, characterized in that: The motor is provided with a rear cover shell, one end of which is provided with an opening, wherein the direction of the opening is toward the direction of smoke exhaust, a gap is provided between the rear cover shell and the outer wall of the motor, the gap is connected to the inside of the motor, and the heat dissipation vent is connected to the gap.
3. The high temperature resistant explosion proof fan according to claim 1, characterized in that: The outer wall of the motor is provided with a heat dissipation strip.
4. The high temperature resistant explosion proof fan according to claim 1, characterized in that: A filter ring network is arranged between the motor and the rear cover shell.
5. The high temperature resistant explosion proof fan according to claim 4, characterized in that: A portion of the filter ring net faces the heat dissipation vent, and a portion faces the direction of smoke exhaust.
6. The high temperature resistant explosion proof fan according to claim 5, characterized in that: The filter ring network rotates along the rear cover shell and the motor.
7. The high temperature resistant explosion proof fan according to claim 1, characterized in that: A coarse filter is arranged in the heat dissipation channel.
8. The high temperature resistant explosion proof fan according to claim 1, characterized in that: The movable frame is provided with a pull rod and movable wheels.
9. The high temperature resistant explosion proof fan according to claim 1, characterized in that: The movable frame can be raised and lowered; the negative pressure support can be raised and lowered.