Induced draft fan frequency converter cooling device

Abstract

The utility model discloses a cooling device for a frequency converter of an induced draft fan, which is used for a frequency converter chamber and comprises an airflow pipeline and a cooling module. The airflow pipeline comprises a first airflow pipeline and a second airflow pipeline which are mutually independent, the first airflow pipeline is used for discharging hot air in the frequency converter chamber, and the second airflow pipeline is used for introducing external cold air into the frequency converter chamber; the cooling module is connected to the first airflow pipeline and the second airflow pipeline. The cooling module is provided with an air inlet connected with the first airflow pipeline and an air outlet connected with the second airflow pipeline, a heat exchange channel is formed between the air inlet and the air outlet, and a first cooling assembly located on the heat exchange channel and a second cooling assembly independent of the first cooling assembly are arranged in the cooling module. The second cooling assembly is located outside the heat exchange channel. Compared with the prior art, by arranging the cooling module, hot air can be changed into cold air through internal circulation, and the temperature in the frequency converter chamber is ensured.

Description

Technical Field

[0001] This utility model relates to a cooling device for a frequency converter of an induced draft fan, belonging to the field of heat dissipation. Background Technology

[0002] The induced draft fan inverter room is located next to the dust collector. The current cooling method relies on three 10P air conditioners, which are ineffective and cause the inverter to operate at high temperatures. Simultaneously, because the inverter's cooling fan directly exhausts air externally using variable frequency technology, the excessive negative pressure inside leads to significant dust ingress (containing high levels of chloride ions). Furthermore, the high humidity in the surrounding environment further exacerbates the corrosion of the inverter module and electronic components. Currently, multiple corrosion damages have been observed on both the inverter's mainboard and module mainboard, causing frequent inverter failures during operation, ultimately necessitating a switch to mains frequency operation.

[0003] In view of this, it is indeed necessary to improve the existing cooling device for the induced draft fan frequency converter in order to solve the above problems. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a cooling device for the frequency converter of an induced draft fan. This cooling device can achieve better cooling effect when the airflow is circulating inside, while eliminating the negative pressure problem in the frequency converter chamber, solving the serious problem of ash ingress, ensuring stable operation, and eliminating potential operational hazards.

[0005] The technical solution of this utility model is:

[0006] A cooling device for an induced draft fan frequency converter, used in a frequency converter chamber, comprising:

[0007] The airflow duct includes a first airflow duct and a second airflow duct that are independent of each other. The first airflow duct is used to exhaust the hot air inside the inverter room to the outside, and the second airflow duct is used to introduce the cold air outside into the inverter room.

[0008] A cooling module is connected to the first airflow duct and the second airflow duct respectively, and is configured to convert the hot air discharged from the first airflow duct into cold air and deliver it to the inverter room through the second airflow duct;

[0009] The cooling module has an air inlet connected to the first airflow duct and an air outlet connected to the second airflow duct. A heat exchange channel is formed between the air inlet and the air outlet. The cooling module is provided with a first cooling component located on the heat exchange channel and a second cooling component independent of the first cooling component. The second cooling component is located outside the heat exchange channel.

[0010] As a further improvement of this utility model, the air inlet is provided with a plurality of mesh panels, and the first cooling component is located below the mesh panels.

[0011] As a further improvement of this utility model, the first cooling component is a water cooling device, and includes a plurality of water pipes arranged around the inner wall of the cooling module, wherein a cooling area is formed between the plurality of water pipes, and the cooling area is at least partially located on the heat exchange channel.

[0012] As a further improvement of this utility model, the second cooling component is located below the heat exchange channel and is configured to activate and emit cold air to reduce the temperature inside the cooling module.

[0013] As a further improvement of this utility model, the cooling module also includes an auxiliary cooling device connected to the second cooling component, the auxiliary cooling device being configured to absorb the heat generated by the second cooling component during operation.

[0014] As a further improvement of this utility model, between the first airflow duct and the air inlet, the cooling device is further provided with an impeller assembly, which is configured to accelerate the flow rate of hot air entering the cooling module.

[0015] As a further improvement of this utility model, the first airflow duct includes a main flow channel and two branch channels separated from the main flow channel. The main flow channel is supplied with hot air discharged from the inverter chamber. The first branch channel is connected to the air inlet, and the second branch channel is connected to the outside air.

[0016] As a further improvement of this invention, the second branch channel is configured to be selectively openable.

[0017] As a further improvement of this utility model, the mesh is inclined toward the air outlet and forms an air guiding surface.

[0018] As a further improvement of this utility model, the cross-sectional width of the mesh gradually decreases in the direction of hot air flow.

[0019] The beneficial technical effects of this utility model are as follows: By setting up independent first and second airflow pipes between the inverter chamber and the cooling module, the hot air in the inverter chamber can flow into the cooling module through the first airflow pipe, and after passing through the first and second cooling components inside the cooling module, it is transformed into cold air and flows into the inverter chamber through the second airflow pipe to cool the inverter chamber. The entire process is an internal airflow circulation, which achieves a better cooling effect. At the same time, it eliminates the negative pressure problem in the inverter chamber, solves the problem of serious dust ingress, enables the inverter to operate stably, and eliminates potential operating hazards. Attached Figure Description

[0020] Figure 1 This is a structural schematic diagram of a cooling device for an induced draft fan inverter and an inverter chamber, which conforms to a preferred embodiment of this utility model.

[0021] Figure 2 yes Figure 1 A schematic diagram of the cooling module.

[0022] Figure 3 yes Figure 2 The diagram shows the internal structure of the cooling module. Detailed Implementation

[0023] In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0024] Please see Figures 1 to 3 As shown, this utility model discloses a cooling device 100 for an induced draft fan frequency converter, used in a frequency converter chamber 200, where a frequency converter 300 is installed. The cooling device 100 is used to cool the frequency converter chamber 200 to ensure the smooth operation of the frequency converter 300.

[0025] The cooling device 100 includes an airflow duct connected to the inverter chamber 200. The airflow duct includes a first airflow duct 11 and a second airflow duct 12 that are independent of each other. The first airflow duct 11 is used to discharge hot air inside the inverter chamber 200 to the outside, and the second airflow duct 12 is used to introduce external cold air into the inverter chamber 200.

[0026] Preferably, the connector between the inverter chamber 200 and the first airflow duct 11 is provided with a fan assembly (not shown), which is used to introduce hot air from inside the inverter chamber 200 into the first airflow duct 11 and discharge it.

[0027] The cooling device 100 further includes a cooling module 2 connected to the airflow duct. The cooling module 2 is connected to the first airflow duct 11 and the second airflow duct 12 respectively, and is configured to convert the hot air discharged from the first airflow duct 11 into cold air and deliver it to the inverter room 200 through the second airflow duct 12.

[0028] The cooling module 2 has an air inlet 21 connected to the first airflow duct 11 and an air outlet 22 connected to the second airflow duct 12. A heat exchange channel is formed between the air inlet 21 and the air outlet 22. Between the first airflow duct 11 and the air inlet 21, the cooling device 100 is also provided with an impeller assembly 3, which is configured to accelerate the flow rate of hot air entering the cooling module 2.

[0029] The cooling module 2 is further provided with a first cooling component 23 located on the heat exchange channel and a second cooling component 24 independent of the first cooling component 23. The second cooling component 24 is located outside the heat exchange channel.

[0030] In this embodiment, the first cooling component 23 is always activated, while the second cooling component 24 is configured to be selectively activated. Normally, only the first cooling component 23 is needed to meet the cooling requirements of the inverter room 200. In hot weather, the second cooling component 24 can be selectively activated to reduce the internal temperature of the cooling module 2.

[0031] Preferably, the first cooling component 23 is a water cooling device and is externally connected to a water inlet pipe 231. The first cooling component 23 includes a plurality of water pipes arranged around the inner wall of the cooling module 2, and a cooling area is formed between the plurality of water pipes. The cooling area is at least partially located on the heat exchange channel.

[0032] The air inlet 21 is provided with several mesh panels 211, and the first cooling component 23 is located below the mesh panels 211. That is to say, when hot air enters the interior of the cooling module 2 from the air inlet 21, it must first pass through the cooling area of ​​the first cooling component 23, and then be discharged from the air outlet 22. Therefore, the first cooling component 23 can exchange heat with the hot air in a timely and continuous manner.

[0033] Preferably, the mesh 211 is inclined towards the air outlet 22, forming a guide surface. This arrangement guides the airflow for easier discharge. Simultaneously, the cross-sectional width of the mesh 211 gradually decreases in the direction of hot air flow. This increases the airflow velocity.

[0034] The second cooling component 24 is located below the heat exchange channel and is configured to activate and emit cold air to reduce the internal temperature of the cooling module 2. The cooling module 2 also includes an auxiliary cooling device 25 connected to the second cooling component 24, configured to absorb the heat generated by the second cooling component 24 during operation. Preferably, the second cooling component 24 can use a cooling method similar to air conditioning refrigerant, and the auxiliary cooling device 25 can further cool the heat generated by the second cooling component 24 during operation, ensuring the normal operation of the second cooling component 24 while preventing the temperature inside the cooling module 2 from rising. The auxiliary cooling device 25 is preferably a water-cooled device, using circulating water for heat exchange. Two second cooling components 24 are preferably present.

[0035] The first airflow channel 11 includes a main flow channel 111 and two branch channels separating from the main flow channel 111. The main flow channel 111 supplies hot air discharged from the inverter chamber 200. The first branch channel 112 is connected to the air inlet 21, and the second branch channel 113 is connected to the outside air. The second branch channel 113 is configured to be selectively open; normally, it is closed to ensure internal airflow and prevent external dust from entering. When the cooling module 2 malfunctions, the second branch channel 113 serves as an emergency channel to discharge hot air.

[0036] In summary, the induced draft fan inverter cooling device 100 of this utility model, by setting up an independent first airflow pipe 11 and a second airflow pipe 12 between the inverter chamber 200 and the cooling module 2, allows the hot air in the inverter chamber 200 to flow into the cooling module 2 through the first airflow pipe 11, and after passing through the first cooling component 23 and the second cooling component 24 inside the cooling module 2, it is transformed into cold air and flows into the inverter chamber 200 through the second airflow pipe 12, thus cooling the inverter chamber 200. The entire process involves internal airflow circulation, achieving a better cooling effect. At the same time, it eliminates the negative pressure problem in the inverter chamber 200, solves the problem of serious dust ingress, ensures stable operation of the inverter 300, and eliminates potential operational hazards.

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A cooling device for an induced draft fan frequency converter, used in a frequency converter chamber, characterized in that, include: The airflow duct includes a first airflow duct and a second airflow duct that are independent of each other. The first airflow duct is used to exhaust the hot air inside the inverter room to the outside, and the second airflow duct is used to introduce the cold air outside into the inverter room. A cooling module is connected to the first airflow duct and the second airflow duct respectively, and is configured to convert the hot air discharged from the first airflow duct into cold air and deliver it to the inverter room through the second airflow duct; The cooling module has an air inlet connected to the first airflow duct and an air outlet connected to the second airflow duct. A heat exchange channel is formed between the air inlet and the air outlet. The cooling module is provided with a first cooling component located on the heat exchange channel and a second cooling component independent of the first cooling component. The second cooling component is located outside the heat exchange channel.

2. The cooling device for an induced draft fan frequency converter according to claim 1, characterized in that, The air inlet is provided with several mesh panels, and the first cooling component is located below the mesh panels.

3. The cooling device for an induced draft fan frequency converter according to claim 1, characterized in that, The first cooling component is a water cooling device and includes a plurality of water pipes arranged around the inner wall of the cooling module, wherein a cooling area is formed between the plurality of water pipes, and the cooling area is at least partially located on the heat exchange channel.

4. The cooling device for an induced draft fan frequency converter according to claim 1, characterized in that, The second cooling component is located below the heat exchange channel and is configured to activate and emit cold air to reduce the temperature inside the cooling module.

5. A cooling device for an induced draft fan frequency converter according to claim 4, characterized in that, The cooling module also includes an auxiliary cooling device connected to the second cooling component, the auxiliary cooling device being configured to absorb the heat generated by the second cooling component during operation.

6. The cooling device for an induced draft fan frequency converter according to claim 1, characterized in that, Between the first airflow duct and the air inlet, the cooling device is further provided with an impeller assembly, which is configured to accelerate the flow rate of hot air entering the cooling module.

7. A cooling device for an induced draft fan frequency converter according to claim 1, characterized in that, The first airflow duct includes a main flow channel and two branch channels separated from the main flow channel. The main flow channel is supplied with hot air discharged from the inverter chamber. The first branch channel is connected to the air inlet, and the second branch channel is connected to the outside air.

8. A cooling device for an induced draft fan frequency converter according to claim 7, characterized in that, The second branch channel is configured to be selectively open.

9. A cooling device for an induced draft fan frequency converter according to claim 2, characterized in that, The mesh is tilted toward the air outlet and forms an air guide surface.

10. A cooling device for an induced draft fan frequency converter according to claim 2, characterized in that, The cross-sectional width of the mesh gradually decreases in the direction of hot air flow.

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