Automatic isolation feedback device of cooling fan

Abstract

The utility model relates to the technical field of fan equipment, in particular to an automatic isolation feedback device for a cooling fan, which is arranged in a wind power converter cabinet and comprises a controller, a smoke sensor, a heptafluoropropane fire extinguisher tank, a conveying pipeline, a plurality of electric nozzles and a plurality of cooling devices. Each heat dissipation device comprises a heat dissipation fan which is arranged at the bottom of the wind power converter cabinet and is used for conveying air into the wind power converter cabinet, a relay module which is connected to the power supply end of the heat dissipation fan in series, and a current detection circuit module which is electrically connected to the power supply end of the heat dissipation fan and is used for detecting the power-on current of the heat dissipation fan; the electric nozzles are mounted right above the cooling fans in a one-to-one correspondence manner; each electric nozzle is connected to the heptafluoropropane fire extinguisher tank through a conveying pipeline; the electronic devices are cooperatively connected. According to the utility model, after the fault of the cooling fan is detected, the fault cooling fan is automatically cut off, and other normal cooling fans are adjusted, so that the influence of over-temperature in the wind power converter cabinet on production is avoided.

Description

Technical Field

[0001] This utility model relates to the field of heat dissipation equipment technology, and in particular to an automatic isolation feedback device for a cooling fan. Background Technology

[0002] Wind turbine converter cabinets are a crucial component of wind power generation systems. They house electrical equipment such as power modules, control modules, and grid-connection modules. These components generate heat during operation, therefore, wind turbine converter cabinets are typically equipped with multiple cooling fans that operate continuously. Wind power generation systems are generally installed in open, sparsely populated areas such as coastlines and mountainous regions with abundant winds, and are usually unattended. Maintenance is typically performed periodically or when equipment malfunctions are detected. If the cooling fans within the wind turbine converter cabinet fail and are not promptly adjusted and maintained, the cabinet may overheat and automatically shut off power, thus impacting production. Utility Model Content

[0003] Therefore, in order to address the above problems, this utility model proposes an automatic isolation feedback device for cooling fans, which can automatically shut down the faulty cooling fan and adjust other normal cooling fans after detecting a cooling fan failure, so as to avoid overheating in the wind power converter cabinet and affecting production.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An automatic isolation feedback device for a cooling fan is installed inside a wind power converter cabinet, including a controller, a smoke sensor, a heptafluoropropane fire extinguisher canister, a delivery pipeline, multiple electric nozzles, and multiple independent cooling devices.

[0006] Each of the aforementioned heat dissipation devices includes a cooling fan installed at the bottom of the wind power converter cabinet for supplying air into the wind power converter cabinet, a relay module connected in series with the power supply terminal of the cooling fan, and a current detection circuit module electrically connected to the power supply terminal of the cooling fan for detecting the current of the cooling fan.

[0007] One electric nozzle is installed directly above each of the cooling fans;

[0008] Each of the electric nozzles is connected to a heptafluoropropane fire extinguisher tank via a delivery pipe;

[0009] The control terminal of each relay module, the current detection circuit module, the electric nozzle, and the smoke sensor are electrically connected to the controller.

[0010] Furthermore, it also includes temperature sensors installed inside the wind power converter cabinet;

[0011] The heat dissipation device also includes a frequency converter module, and the relay module is electrically connected to the cooling fan through the frequency converter module;

[0012] The temperature sensor and the control terminals of each frequency converter module are electrically connected to the controller.

[0013] Furthermore, it also includes an audible and visual alarm installed outside the wind power converter cabinet; the audible and visual alarm is electrically connected to the controller.

[0014] Furthermore, it also includes a wireless communication module; the wireless communication module is electrically connected to the controller.

[0015] Furthermore, the wireless communication module adopts any one or a combination of several of the following: NB-IoT communication module, LoRa communication module, 3G communication module, 4G communication module, and 5G communication module.

[0016] By adopting the aforementioned technical solution, the beneficial effects of this utility model are:

[0017] This automatic isolation feedback device for cooling fans uses a current detection circuit module at the power supply end of the cooling fan to detect the current and feed it back to the controller. At the same time, a smoke sensor detects the smoke concentration inside the wind power converter cabinet and feeds it back to the controller.

[0018] When an abnormal current is detected in a cooling fan, and / or the smoke sensor detects that the smoke concentration inside the wind power converter cabinet exceeds the threshold, the controller determines that the cooling fan is abnormal. It sends an alarm message through the wireless communication module (to the staff's terminal devices, such as mobile phones and computers), and controls the circuit breakers of each relay module. At the same time, the electric nozzle above the cooling fan with abnormal current is activated to quickly spray heptafluoropropane to cool and extinguish the fire, thus isolating the cooling fan. After a period of time (e.g., 10 minutes), the controller controls the relay modules corresponding to the other normal cooling fans to conduct.

[0019] If an abnormal current is detected in a cooling fan, but the smoke sensor does not detect smoke inside the wind turbine converter cabinet, the controller will only disconnect the relay module corresponding to the cooling fan with the abnormal current, while the other normal cooling fans will continue to run. Furthermore, by detecting the temperature inside the wind turbine converter cabinet using a temperature sensor, the controller adjusts the frequency of the inverter module corresponding to the normal cooling fans, controlling the cooling fan speed and thus regulating the temperature inside the wind turbine converter cabinet. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the automatic isolation feedback device for the cooling fan.

[0021] Figure 2 This is a circuit connection block diagram of the automatic isolation feedback device for the cooling fan. Detailed Implementation

[0022] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0023] refer to Figure 1 and Figure 2 This embodiment provides an automatic isolation feedback device for a cooling fan, which is installed inside a wind power converter cabinet 100. The wind power converter cabinet 100 is an existing device, and this utility model does not involve any improvement to the structure of the wind power converter cabinet 100, so it will not be described in detail here.

[0024] This automatic isolation feedback device for cooling fans includes a smoke sensor 1, a temperature sensor 2, a heptafluoropropane fire extinguisher canister 3, a delivery pipe 4, multiple electric nozzles 5, multiple independent cooling devices 6, a controller 7, a wireless communication module 8, and an audible and visual alarm 9.

[0025] The smoke sensor 1 is used to detect the smoke concentration inside the wind power converter cabinet 100 and feed it back to the controller 7. The smoke concentration threshold can be set in the controller 7 (the specific parameters of the smoke concentration threshold are known in the art and will not be described in detail here).

[0026] The temperature sensor 2 is used to detect the temperature inside the wind power converter cabinet 100 and feed it back to the controller 7.

[0027] Preferably, the audible and visual alarm 9 is located outside the wind power converter cabinet 100 for easy observation.

[0028] Each of the aforementioned heat dissipation devices 6 includes a cooling fan 61 located at the bottom of the wind power converter cabinet 100 for supplying air into the wind power converter cabinet 100, a frequency converter module 62 and a relay module 63 connected in series to the power supply terminal of the cooling fan 61, and a current detection circuit module 64 electrically connected to the power supply terminal of the cooling fan 61 for detecting the current flowing through the cooling fan 61. The input terminal of each relay module 63 is connected to a power supply (such as the AC bus inside the wind power converter cabinet 100; those skilled in the art should understand the technical means by which the relay module 63 is connected to the power supply, wherein the power supply is used to power the cooling fan 61, which will not be described in detail here).

[0029] The smoke sensor 1, temperature sensor 2, electric nozzle 5, cooling fan 61, frequency converter module 62, relay module 63, current detection circuit module 64, controller 7, wireless communication module 8, and audible and visual alarm 9 mentioned above are all existing electronic devices. Those skilled in the art should understand the conventional selection of the above electronic devices. Preferably, in this specific embodiment, the controller 7 is a Siemens S7-200 controller, and the wireless communication module 8 is an NB-IoT communication module.

[0030] An electric nozzle 5 is installed directly above each cooling fan 61. During installation, care should be taken to ensure that the heptafluoropropane airflow ejected by the electric nozzle 5 at least covers the cooling fan 61 located directly below it.

[0031] Each of the electric nozzles 5 is connected to a heptafluoropropane fire extinguisher canister 3 via a delivery pipe 4. The heptafluoropropane fire extinguisher canister 3 contains pressurized heptafluoropropane. When the electric nozzle 5 is opened, the heptafluoropropane is quickly sprayed out from the electric nozzle 5, which can quickly absorb heat and cool down. Furthermore, the heptafluoropropane decomposes at high temperature to produce fluorine-containing free radicals (such as CF3, CF2, etc.). These free radicals react with active free radicals (H, O, ·OH, etc.) in the flame to generate stable compounds (such as CO2, H2O, HF), thereby interrupting the chain reaction of combustion.

[0032] The control terminal of each relay module 63, the current detection circuit module 64, the smoke sensor 1, the temperature sensor 2, the electric nozzle 5, the wireless communication module 8, and the audible and visual alarm 9 are electrically connected to the controller 7.

[0033] When an abnormal current is detected in a cooling fan 61, and the smoke sensor 1 detects that the smoke concentration inside the wind power converter cabinet 100 exceeds the threshold, the controller 7 determines that the cooling fan 61 is abnormal and sends an alarm message to the staff's terminal device, such as a mobile phone or computer, through the wireless communication module 8. At the same time, the controller 7 controls the relay modules 63 to disconnect, and the electric nozzle 5 above the cooling fan 61 with abnormal current is activated (the electric nozzle 5 above the other normal cooling fans 61 is not activated), quickly spraying heptafluoropropane to cool down and extinguish the fire, thus isolating the cooling fan 61. After a period of time (e.g., 10 minutes), the controller controls the relay modules 63 corresponding to the other normal cooling fans 61 to conduct.

[0034] When an abnormal current is detected in a cooling fan 61, but the smoke sensor 1 does not detect smoke inside the wind power converter cabinet 100, the controller 7 only disconnects the relay module 63 corresponding to the cooling fan 61 with the abnormal current, while the other normal cooling fans 61 continue to operate. Furthermore, by detecting the temperature inside the wind power converter cabinet 100 through the temperature sensor 2, the controller adjusts the frequency of the inverter module 62 corresponding to the normal cooling fan 61, controlling the speed of the cooling fan 61, thereby adjusting the temperature inside the wind power converter cabinet 100. For example, if it is necessary to maintain the temperature inside the wind power converter cabinet 100 below 30°C, then when the temperature inside the wind power converter cabinet 100 is higher than 30°C, the frequency of the inverter module 62 corresponding to the normal cooling fan 61 is adjusted, increasing the speed of the normal cooling fan 61, thereby maintaining the temperature inside the wind power converter cabinet 100 below 30°C.

[0035] The aforementioned wireless communication module 8 can also be any one of LoRa communication module, 3G communication module, 4G communication module, and 5G communication module, or any combination of several of NB-IoT communication module, LoRa communication module, 3G communication module, 4G communication module, and 5G communication module.

[0036] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. An automatic isolation feedback device for a cooling fan, installed inside a wind power converter cabinet, characterized in that: It includes a controller, smoke sensor, heptafluoropropane fire extinguisher canister, delivery pipeline, multiple electric nozzles, and multiple independent heat dissipation devices; Each of the aforementioned heat dissipation devices includes a cooling fan installed at the bottom of the wind power converter cabinet for supplying air into the wind power converter cabinet, a relay module connected in series to the power supply terminal of the cooling fan, and a current detection circuit module electrically connected to the power supply terminal of the cooling fan for detecting the current of the cooling fan. One electric nozzle is installed directly above each of the cooling fans; Each of the electric nozzles is connected to a heptafluoropropane fire extinguisher tank via a delivery pipe; The control terminal of each relay module, the current detection circuit module, the electric nozzle, and the smoke sensor are electrically connected to the controller.

2. The automatic isolation feedback device for a cooling fan according to claim 1, characterized in that: It also includes temperature sensors installed inside the wind power converter cabinet; The heat dissipation device also includes a frequency converter module, and the relay module is electrically connected to the cooling fan through the frequency converter module; The temperature sensor and the control terminals of each frequency converter module are electrically connected to the controller.

3. The automatic isolation feedback device for a cooling fan according to claim 1, characterized in that: It also includes audible and visual alarms installed outside the wind power converter cabinet; The audible and visual alarm is electrically connected to the controller.

4. The automatic isolation feedback device for a cooling fan according to claim 1, characterized in that: It also includes a wireless communication module; The wireless communication module is electrically connected to the controller.

5. The automatic isolation feedback device for a cooling fan according to claim 4, characterized in that: The wireless communication module adopts any one or a combination of several of the following: NB-IoT communication module, LoRa communication module, 3G communication module, 4G communication module, and 5G communication module.

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