Heat dissipation system for frequency conversion chamber of induced draft fan

Abstract

The utility model provides a heat dissipation system for a frequency conversion chamber of an induced draft fan. The heat dissipation system comprises an air collection module, an air pipe and an air return module, the air collecting module is arranged above a frequency converter in a frequency conversion chamber of the induced draft fan; the first end of the air pipe communicates with the air collecting module, and the second end of the air pipe extends out of the induced draft fan frequency conversion chamber. The air return module communicates with the interior of the induced draft fan frequency conversion chamber. According to the heat dissipation system for the frequency conversion chamber of the induced draft fan, hot air generated in the working process of the frequency converter is extracted through the air collection module and exhausted through the air pipe for heat dissipation, meanwhile, air is supplied to the interior of the frequency conversion chamber of the induced draft fan through the air return module, and the heat dissipation effect is avoided or relieved when the hot air in the frequency conversion chamber of the induced draft fan is extracted. Therefore, the technical problem that dust is adsorbed into the frequency conversion chamber of the induced draft fan due to the fact that the interior of the frequency conversion chamber of the induced draft fan is in the negative pressure state is avoided or relieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of induced draft fan heat dissipation, and particularly relates to a heat dissipation system for the frequency conversion chamber of an induced draft fan. Background Art

[0002] An induced draft fan is a device that generates negative pressure through the rotation of an impeller and then extracts air from a system or equipment. The core components of an induced draft fan include a motor and a frequency converter. Among them, the frequency converter can change the speed of the motor to adjust the wind force of the induced draft fan.

[0003] In industrial production, frequency converters are usually installed in a frequency conversion chamber in a centralized manner, and the hot air generated during the operation of the frequency converters is directly extracted from the frequency conversion chamber by an exhaust fan. However, directly extracting the hot air generated by the frequency converter using an exhaust fan will cause a negative pressure to form in the frequency conversion chamber, causing outdoor dust to be adsorbed into the chamber under the action of the negative pressure, resulting in dust accumulation on the frequency converter and even causing a short circuit and damaging the frequency converter.

[0004] Therefore, how to dissipate heat from the frequency conversion chamber while avoiding the formation of negative pressure inside the frequency conversion chamber and causing dust accumulation has become a technical problem to be solved in this field. Summary of the Utility Model

[0005] In order to solve the technical problem in the background art that while dissipating heat from the frequency conversion chamber, it is also necessary to avoid the formation of negative pressure inside the frequency conversion chamber and causing dust accumulation, the utility model provides a heat dissipation system for the frequency conversion chamber of an induced draft fan.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A heat dissipation system for the frequency conversion chamber of an induced draft fan, the heat dissipation system for the frequency conversion chamber of the induced draft fan includes: an air collection module, an air duct, and a return air module; wherein, the air collection module is arranged above the frequency converter in the frequency conversion chamber of the induced draft fan to extract the hot air generated by the frequency converter; the air duct includes a first end and a second end, the first end is communicated with the air collection module, and the second end extends out of the frequency conversion chamber of the induced draft fan to discharge the hot air; the return air module is communicated with the inside of the frequency conversion chamber of the induced draft fan, and the return air module supplies air to the inside of the frequency conversion chamber of the induced draft fan to eliminate or weaken the negative pressure in the frequency conversion chamber of the induced draft fan.

[0008] Optionally, the return air module includes a housing and a heat exchange component, the housing is provided with an air inlet and an air outlet, the air inlet is communicated with the second end, and the air outlet is communicated with the inside of the frequency conversion chamber of the induced draft fan; inside the housing, an air duct is formed between the air inlet and the air outlet; the heat exchange component is arranged in the air duct.

[0009] Optionally, the heat exchange component includes: a working liquid injection pipe, a working liquid return pipe, and a heat exchange pipe; the heat exchange pipe is disposed in the air duct and is disposed near the air outlet; the working liquid injection pipe and the working liquid return pipe communicate with the heat exchange pipe, and both the working liquid injection pipe and the working liquid return pipe extend out of the housing and communicate with a working liquid circulation system; wherein, the working liquid injection pipe is used to allow the working liquid to enter the heat exchange pipe for circulation, and the working liquid return pipe is used to allow the working liquid in the heat exchange pipe to return to the working liquid circulation system.

[0010] Optionally, the working liquid injection pipe is connected to a side of the heat exchange pipe near the air outlet, and the working liquid return pipe is connected to a side of the heat exchange pipe near the air inlet.

[0011] Optionally, the return air module further includes a dehumidification component, and the dehumidification component is disposed between the heat exchange component and the air outlet.

[0012] Optionally, a third end is provided at a portion of the air duct outside the frequency converter of the induced draft fan, and an emergency air outlet is provided at the third end.

[0013] Optionally, a baffle is provided at the emergency air outlet, and the baffle is movably connected within the emergency air outlet.

[0014] Optionally, the return air module includes a detection component, and the detection component is disposed within the air outlet for detecting and analyzing the return air temperature and air volume at the air outlet; a driving member is provided at the emergency air outlet, and the driving member is connected to the baffle.

[0015] Optionally, the return air module includes a fresh air filtration component.

[0016] Optionally, a fan is disposed within the air collecting module to extract the hot air generated by the frequency converter.

[0017] The beneficial effects of the present utility model are:

[0018] The utility model provides a frequency conversion room heat dissipation system for an induced draft fan. The system includes an air collecting module, an air duct and a return air module; the air collecting module is arranged above the frequency converter in the frequency conversion room of the induced draft fan; the first end of the air duct is communicated with the air collecting module, and the second end of the air duct extends out of the frequency conversion room of the induced draft fan; the return air module is communicated with the inside of the frequency conversion room of the induced draft fan. The frequency conversion room heat dissipation system provided by the utility model extracts the hot air generated during the operation of the frequency converter through the air collecting module, discharges the hot air through the air duct for heat dissipation, and at the same time, through the return air module, sends air into the frequency conversion room of the induced draft fan, avoiding or reducing the phenomenon of negative pressure formed in the frequency conversion room of the induced draft fan when the hot air inside the frequency conversion room of the induced draft fan is extracted, thereby reducing the technical problem that dust is adsorbed into the frequency conversion room of the induced draft fan due to the negative pressure inside the frequency conversion room of the induced draft fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 FIG. is a schematic diagram of a frequency conversion room heat dissipation system for an induced draft fan described in the present utility model;

[0020] Figure 2 FIG. is a schematic diagram of further optimization of the frequency conversion room heat dissipation system for an induced draft fan described in the present utility model;

[0021] Figure 3 FIG. is a schematic diagram of the return air module described in the present utility model;

[0022] Figure 4 FIG. is a schematic diagram of the heat exchange tube described in the present utility model.

[0023] Wherein: 1. Air collecting module; 2. Air duct; 21. First end; 22. Second end; 23. Third end; 3. Return air module; 31. Housing; 311. Air inlet; 312. Air outlet; 32. Heat exchange component; 321. Working liquid injection pipe; 322. Working liquid return pipe; 323. Heat exchange tube; 4. Frequency conversion room of induced draft fan; 41. Frequency converter. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Referring to Figure 1 , FIG. shows a schematic diagram of a frequency conversion room heat dissipation system for an induced draft fan described in the present utility model. The heat dissipation system includes: an air collecting module 1, an air duct 2 and a return air module 3; wherein, the air collecting module 1 is arranged above the frequency converter 41 in the frequency conversion room 4 of the induced draft fan. Specifically, it can be above the cabinet body of the frequency converter cabinet to extract the hot air generated by the frequency converter 41; the air duct 2 includes a first end 21 and a second end 22. The first end 21 is communicated with the air collecting module 1, and the second end 22 extends out of the frequency conversion room 4 of the induced draft fan to discharge the hot air generated by the frequency converter 41; the return air module 3 is communicated with the inside of the frequency conversion room 4 of the induced draft fan, and the return air module 3 sends air into the inside of the frequency conversion room 4 of the induced draft fan to eliminate or weaken the negative pressure in the frequency conversion room 4 of the induced draft fan.

[0025] In this embodiment, the heat dissipation system of the induced draft fan variable frequency room extracts the hot air generated during the operation of the frequency converter 41 through the air collection module 3, discharges the hot air through the air duct for heat dissipation, and at the same time, through the air return module, sends air into the induced draft fan variable frequency room 4, avoiding or reducing the phenomenon of negative pressure formed inside the induced draft fan variable frequency room 4 when the hot air inside the induced draft fan variable frequency room 4 is extracted through the air collection module 3 and the air duct 2, thereby reducing the technical problem that dust is adsorbed into the induced draft fan variable frequency room 4 due to the negative pressure inside the induced draft fan variable frequency room 4.

[0026] Furthermore, when the air return module 3 sends air into the induced draft fan variable frequency room 4, it should send the filtered and dry air into the induced draft fan variable frequency room 4. Specifically, the air return module 3 can be a fresh air unit component with a filtering and cooling function.

[0027] Furthermore, the air duct 2 can be selected as a metal pipe, specifically any one of an iron sheet pipe, a stainless steel pipe, etc.

[0028] It should be noted that those skilled in the art can specifically select the connection method, model, and material of the air duct 2 according to actual production and use requirements.

[0029] Optionally, referring to Figure 2 and Figure 3 , the air return module 3 described in the present utility model includes a housing 31 and a heat exchange component 32. An air inlet 311 and an air outlet 312 are provided on the housing 31. The air inlet 311 communicates with the second end 22, and the air outlet 312 communicates with the inside of the induced draft fan variable frequency room 4; inside the housing 31, an air duct is formed between the air inlet 311 and the air outlet 312; the heat exchange component 32 is arranged in the air duct.

[0030] In this embodiment, the air return module 3 can include a housing 31 and a heat exchange component 32. An air duct is formed inside the housing 31 through the air inlet 311 and the air outlet 312 on the housing 31, and the heat exchange component 32 is arranged inside the air duct. When the air collection module 1 extracts hot air from the frequency converter 41 and inputs the hot air into the air duct 2, the hot air flows along the air duct 2 to the air return module 3, enters the air duct inside the housing 31 through the air inlet 311, exchanges heat with the heat exchange component 32 in the air duct, the heat exchange component 32 takes away the heat in the hot air, making the hot air cool down to become cold air, and enters the inside of the induced draft fan variable frequency room 4 through the air outlet 312. In this embodiment, the hot air extracted by the air collection module 1 finally returns to the inside of the induced draft fan variable frequency room 4 after passing through the air duct 2, the air inlet 311, the air duct, and the air outlet 312, and exchanges heat with the heat exchange component 32 to cool down when passing through the air duct. In this process, the induced draft fan variable frequency room 4 is cooled by heat dissipation, and at the same time, since it is an internal circulation, a negative pressure state will not be formed inside the induced draft fan variable frequency room 4, avoiding the technical problem that outdoor dust is adsorbed into the induced draft fan variable frequency room 4 under the influence of negative pressure.

[0031] The operating temperature of the frequency converter 41 is usually between -5°C and 40°C. In some low-temperature scenarios, such as extremely cold weather, when the temperature inside the frequency conversion chamber 4 of the induced draft fan is lower than the operating temperature of the frequency converter 41, it will cause the electronic components inside the frequency converter 41 to malfunction, and then lead to the damage of the frequency converter 41.

[0032] Therefore, further, in the heat exchange component 32 of this embodiment, when the cold air extracted by the air collection module 3 is cold air, it can also exchange heat with the cold air, so that the temperature of the cold air rises and then returns to the frequency conversion chamber 4 of the induced draft fan, and then the temperature inside the frequency conversion chamber 4 of the induced draft fan rises to the operating temperature range of the frequency converter 41, avoiding the damage of the frequency converter 41.

[0033] Optionally, the heat exchange component 32 described in the present utility model includes: a working liquid injection pipe 321, a working liquid return pipe 322, and a heat exchange pipe 323; the heat exchange pipe 323 is arranged at a position close to the air outlet 312 in the air duct; both the working liquid injection pipe 321 and the working liquid return pipe 322 are connected to the heat exchange pipe 323, and both the working liquid injection pipe 321 and the working liquid return pipe 322 extend out of the housing 31 and are connected to the working liquid circulation system; wherein, the working liquid injection pipe 321 is used to make the working liquid enter the heat exchange pipe 323 for circulation and exchange heat with the hot air, and the working liquid return pipe 322 is used to make the working liquid in the heat exchange pipe 323 return to the working liquid circulation system.

[0034] In this embodiment, the heat exchange component 32 includes a working liquid injection pipe 321, a working liquid return pipe 322, and a heat exchange pipe 323. The heat exchange pipe 323 accesses the working liquid from the external working liquid circulation system through the working liquid injection pipe 321. The working liquid exchanges heat with the hot air in the heat exchange pipe 323, reducing the temperature of the hot air. After the heat exchange is completed, the working liquid returns to the external working liquid circulation system through the working liquid return pipe 322 for cooling, and then returns to the heat exchange pipe 323 through the working liquid injection pipe 321 for the next cycle of the working liquid. Specifically, when it is necessary to cool and dissipate heat inside the frequency conversion chamber 4 of the induced draft fan, the working liquid should be selected as a coolant.

[0035] Further, referring to Figure 4 , the heat exchange pipe 323 can be selected from any one or a combination of copper pipes, steel pipes, stainless steel pipes, and aluminum-plastic composite pipes, and its shape and structure can be selected from any one or a combination of a spiral structure, a plate surface structure with through holes, or a grid structure. It should be noted that those skilled in the art can specifically select the material and structure of the heat exchange pipe 323 according to actual production and use requirements. Only a relatively preferred implementation scheme is provided in this embodiment.

[0036] Furthermore, the working liquid can be specifically selected as either pure water or an organic acid coolant. It should be noted that those skilled in the art can specifically select the type of working liquid according to actual production and usage requirements. In this embodiment, only a relatively preferred implementation method is provided.

[0037] Furthermore, the temperature of the working liquid can be specifically selected as 5°C to 32°C, specifically it can be 32°C, 30°C, 25°C, 20°C, 15°C, 10°C, and 5°C. Since the operating temperature of the frequency converter 41 is generally between -5°C and 40°C, setting the working liquid temperature between 5°C and 32°C can ensure the cooling and heat dissipation effect on the hot air, so that the temperature in the induced draft fan frequency conversion chamber 4 is maintained within the operating temperature range of the frequency converter 41. It should be noted that those skilled in the art can specifically select the temperature of the working liquid according to actual production and usage requirements. In this embodiment, only a relatively preferred implementation method is provided.

[0038] Furthermore, the working liquid circulation system can be a working liquid circulation tower.

[0039] Optionally, in the present utility model, the working liquid injection pipe 321 is connected to the side of the heat exchange pipe 323 close to the air outlet 312, and the working liquid return pipe 322 is connected to the side of the heat exchange pipe 323 close to the air inlet 311.

[0040] In this embodiment, by connecting the working liquid injection pipe 321 to the side of the heat exchange pipe 323 close to the air outlet 312 and the working liquid return pipe 322 to the side of the heat exchange pipe 323 close to the air inlet 311, the flow direction of the working liquid in the heat exchange pipe 323 is opposite to the flow direction of the hot air in the air duct, thereby improving the heat exchange efficiency. For example, when it is necessary to dissipate heat and cool the inside of the induced draft fan frequency conversion chamber 4, the working liquid is a coolant. The temperature of the part of the coolant close to the air inlet 311 in the heat exchange pipe 323 is relatively high, while the temperature of the part of the coolant close to the air outlet 312 in the heat exchange pipe 323 is relatively low. During the process of the hot air passing through the air duct, the temperature of the heat exchange pipe 323 it contacts gradually decreases, and finally a better cooling and heat dissipation effect is achieved.

[0041] Optionally, the return air module 3 in the present utility model further includes a dehumidification component, and the dehumidification component is arranged between the heat exchange component 32 and the air outlet 312.

[0042] When in a relatively humid scenario, such as during the rainy season, the return of the damp spring days and other weather conditions, when there is a relatively high moisture content in the air in the induced draft fan variable frequency room 4, the moisture in the air can easily enter the frequency converter 41, causing the electronic components in the frequency converter 41 to be affected by moisture and even leading to a short circuit; or, the hot air extracted by the air collection module 1 exchanges heat with the heat exchange component 32 when passing through the air duct. During the heat exchange process, the moisture in the hot air will also condense, forming water droplets on the surface of the heat exchange component 32. When the air is sent back to the induced draft fan variable frequency room 4, the water droplets are easily carried into the interior of the induced draft fan variable frequency room 4 by the air supply. When the water droplets enter the frequency converter 41, it will also cause the electronic components in the frequency converter 41 to be affected by moisture and even lead to a short circuit.

[0043] In this embodiment, a dehumidification component is provided between the heat exchange component 32 and the air outlet 312, so that the heat dissipation system of the induced draft fan variable frequency room has a dehumidification function. While cooling the hot air in a cycle, the moisture content in the air is reduced, avoiding the technical problem of short circuit damage to the frequency converter 41 caused by the humid indoor air in the induced draft fan variable frequency room 4.

[0044] Furthermore, the dehumidification component can be selected from any one or more of a desiccant filter component and a condensation dehumidification component. It should be noted that those skilled in the art can specifically select the specific type and structure of the dehumidification component according to actual production and use requirements. This embodiment only provides a relatively preferred implementation method.

[0045] Optionally, a third end 23 is provided on the part of the air duct outside the induced draft fan variable frequency room 4 in the present utility model, and an emergency air outlet 231 is provided at the third end 23.

[0046] In this embodiment, a third end 23 is provided on the part outside the induced draft fan variable frequency room 4, and an emergency air outlet 231 is provided at the third end 23. In the actual application process, when an emergency occurs, such as a leakage or cut-off of the working liquid or a blockage of the heat exchange component, resulting in a decrease in the heat exchange and cooling efficiency of the hot air by the return air module and an inability to effectively cool and dissipate the heat in the induced draft fan variable frequency room 4, the emergency air outlet 231 can be manually or automatically opened to allow the hot air extracted by the air collection module 1 to be discharged through the emergency air outlet 231.

[0047] Optionally, a baffle is provided at the emergency air outlet 231 of the present utility model, and the baffle is movably connected inside the emergency air outlet. Specifically, the baffle should close the emergency air outlet 231 in the normal state.

[0048] In this embodiment, the emergency air outlet 231 is provided with a baffle, which is movably connected within the emergency air outlet 231. When an emergency occurs, such as leakage or interruption of the working liquid supply, or blockage of the heat exchange component, which causes the heat exchange and cooling efficiency of the return air module for the hot air to decline and the cooling and heat dissipation of the frequency conversion chamber 4 of the induced draft fan cannot be effectively achieved, the movable baffle can be manually or automatically opened, thereby opening the emergency air outlet 231, and the hot air extracted by the air collecting module 1 is discharged through the emergency air outlet 231. Specifically, the emergency air outlet 231 should also be provided with a blocking member to block and fix the baffle after the movable baffle is moved.

[0049] Optionally, the return air module 3 described in the present invention may further include a detection component, and a driving member may be provided at the emergency air outlet 231. Among them, the driving member is connected to the baffle, and the detection component is arranged inside the air outlet, so as to detect and analyze the temperature and air volume of the return air at the air outlet through the detection component. According to the detection results of the temperature and air volume of the return air, the driving member is controlled to drive the baffle to move, so as to switch between the two states of opening and closing of the emergency air outlet.

[0050] In this embodiment, by arranging a detection component inside the air outlet, the temperature and air volume of the return air can be detected, and analyzed by the staff or through an analysis device. When any one of the temperature or air volume of the return air is abnormal, such as the return air temperature is higher than the required temperature or the air volume is greatly reduced, it can be analyzed that the return air module 3 fails. At this time, the driving member can be started through the existing control component to move the baffle to open the emergency air outlet 231, and an alarm message is sent to the staff to timely handle the fault.

[0051] Furthermore, the driving member described in this embodiment can be any one of an electric push rod and a hydraulic push rod. It should be noted that those skilled in the art can specifically select the type and connection method of the driving member according to the actual production and use requirements. This embodiment only provides a relatively preferred implementation scheme.

[0052] Furthermore, in the detection component described in this embodiment, the temperature of the return air can be measured by any one of an infrared thermometer and a probe thermometer, and the air volume can also be measured by an anemometer. It should be noted that those skilled in the art can specifically select the type of the detection component according to the actual production and use requirements. This embodiment only provides a relatively preferred implementation scheme.

[0053] Optionally, the return air module 3 described in the present invention may include a fresh air filtering component.

[0054] In this embodiment, the return air module 3 may include a fresh air filtering component. Specifically, the fresh air filtering component may be composed of a fresh air fan and a filter element. The fresh air fan sends fresh air with a lower temperature into the frequency conversion chamber 4 of the induced draft fan, and the filter element filters the dust and moisture in the fresh air, so that the fresh air sent into the interior of the frequency conversion chamber 4 of the induced draft fan is dry and has a low dust content. While cooling the frequency converter 4, it avoids the formation of negative pressure and dust accumulation in the frequency conversion chamber 4 of the induced draft fan.

[0055] Optionally, a fan 11 is arranged in the air collecting module 1 described in the utility model to extract the hot air generated by the frequency converter 41.

[0056] In this embodiment, the air collecting module 1 should include a fan 11, which extracts the hot air generated by the frequency converter 41 and sends the hot air into the air duct 2.

[0057] Further, when the second end 22 of the air duct 2 is communicated with the air inlet 31 of the return air module 3, the fan of the air collecting module 1 may be a first fan, and a second fan 33 may also be included in the return air module 3 to increase the air volume and air speed of the air sent into the frequency conversion chamber 4 of the induced draft fan, avoiding the decrease of the air supply speed after passing through the housing 31 and the heat exchange component 32.

[0058] Although the embodiments of the present utility model have been shown and described above, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A cooling system for a frequency conversion room of an induced draft fan, characterized in that: The induced draft fan frequency conversion room heat dissipation system comprises: an air collection module (1), an air duct (2) and an air return module (3); wherein: The air collection module (1) is arranged above the frequency converter (41) in the frequency converter room (4) of the induced draft fan to extract the hot air generated by the frequency converter (41); The air duct (2) comprises a first end (21) and a second end (22), wherein the first end (21) is connected to the air collecting module (1), and the second end (22) extends out of the induced draft fan frequency conversion chamber (4) to discharge the hot air; The return air module (3) is connected to the interior of the induced draft fan frequency conversion room (4), and the return air module (3) supplies air to the interior of the induced draft fan frequency conversion room (4) to eliminate or weaken the negative pressure in the induced draft fan frequency conversion room (4).

2. The induced draft fan frequency conversion room heat dissipation system according to claim 1, characterized in that: The return air module (3) comprises a shell (31) and a heat exchange assembly (32); the shell (31) is provided with an air inlet (311) and an air outlet (312); the air inlet (311) is connected to the second end (22), and the air outlet (312) is connected to the interior of the induced draft fan frequency conversion chamber (4); an air duct is formed in the shell (31) between the air inlet (311) and the air outlet (312); The heat exchange component (32) is arranged in the air duct.

3. The cooling system for the frequency conversion room of the induced draft fan according to claim 2 is characterized in that: The heat exchange component (32) comprises: a working liquid injection pipe (321), a working liquid return pipe (322) and a heat exchange pipe (323); The heat exchange tube (323) is arranged in the air duct and close to the air outlet (312); The working liquid injection pipe (321) and the working liquid return pipe (322) are connected to the heat exchange pipe (323); the working liquid injection pipe (321) and the working liquid return pipe (322) both extend out of the shell (31) and are connected to a working liquid circulation system; wherein the working liquid injection pipe (321) is used to allow the working liquid to enter the heat exchange pipe (323) for circulation, and the working liquid return pipe (322) is used to allow the working liquid in the heat exchange pipe (323) to return to the working liquid circulation system.

4. The cooling system for the frequency conversion room of the induced draft fan according to claim 3 is characterized in that: The working liquid injection pipe (321) is connected to a side of the heat exchange pipe (323) close to the air outlet (312), and the working liquid return pipe (322) is connected to a side of the heat exchange pipe (323) close to the air inlet (311).

5. The cooling system for the frequency conversion room of the induced draft fan according to claim 2 is characterized in that: The return air module (3) also includes a dehumidification component, which is arranged between the heat exchange component (32) and the air outlet (312).

6. The cooling system for the frequency conversion room of the induced draft fan according to claim 2 is characterized in that: The portion of the air duct (2) outside the induced draft fan frequency conversion chamber (4) is provided with a third end (23), and the third end (23) is provided with an emergency air outlet (231).

7. The cooling system for the frequency conversion room of the induced draft fan according to claim 6 is characterized in that: The emergency air outlet (231) is provided with a baffle, and the baffle is movably connected inside the emergency air outlet (231).

8. The cooling system for the frequency conversion room of the induced draft fan according to claim 7 is characterized in that: The return air module (3) comprises a detection component, which is arranged in the air outlet (312) and is used to detect and analyze the return air temperature and air volume of the air outlet (312); A driving member is provided at the emergency air outlet (231), and the driving member is connected to the baffle.

9. The induced draft fan frequency conversion room heat dissipation system according to claim 1, characterized in that: The return air module (3) comprises a fresh air filter assembly.

10. The cooling system for the frequency conversion room of the induced draft fan according to claim 1, characterized in that: The wind collection module (1) is provided with a fan to extract the hot air generated by the frequency converter.

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