Noise reduction centrifugal fan system for power distribution device and power distribution device

Abstract

The utility model provides a noise reduction centrifugal fan system for a power distribution device and the power distribution device, and the noise reduction centrifugal fan system comprises a temperature detection module, a fan and a control module, the control module is respectively connected with the temperature detection module and the fan; the temperature detection module is used for detecting the temperature of the power distribution device and outputting the temperature to the control module; and the control module is used for controlling the fan to operate at a rotating speed value corresponding to the current temperature value of the power distribution device when the temperature of the power distribution device is greater than a preset temperature, so as to adapt to the heat dissipation requirements of the power distribution device at different temperatures and reduce the noise of the fan. According to the utility model, the temperature of the power distribution device is detected, and when the temperature is greater than the preset temperature value, the fan is controlled to operate at the rotating speed value corresponding to the temperature, so that the heat dissipation requirements of the power distribution device at different temperatures are met, and the noise of the fan is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of heat dissipation of power distribution devices, in particular to a noise reduction centrifugal fan system for a power distribution device and the power distribution device. Background Art

[0002] With the development of cities and economy and the improvement of people's living standards, the number of newly built commercial and residential buildings is increasing. Due to the limited land resources and development and construction costs, distribution stations are generally attached to buildings. The noise and vibration generated by distribution stations will affect nearby residents and the environment. In order to avoid complaints from surrounding residents, the fans and blowers of traditional distribution devices are often turned off, which will cause the distribution device to be in a high temperature state for a long time due to insufficient ventilation, affecting the life of transformers and power distribution equipment, and even endangering power supply safety. Utility Model Content

[0003] The main purpose of the utility model is to provide a noise-reducing centrifugal fan system for a power distribution device, aiming to reduce the noise of the fan while achieving heat dissipation of the power distribution device.

[0004] To achieve the above-mentioned purpose, the present invention proposes a noise reduction centrifugal fan system for a power distribution device, the noise reduction centrifugal fan system comprising:

[0005] Temperature detection module, fan and control module;

[0006] The control module is connected to the temperature detection module and the fan respectively;

[0007] The temperature detection module is used to detect the temperature of the power distribution device and output it to the control module;

[0008] The control module is used to control the fan to run at a speed value corresponding to the current temperature value of the distribution device when the temperature of the distribution device is greater than a preset temperature, so as to adapt to the heat dissipation requirements of the distribution device at different temperatures and reduce the noise of the fan.

[0009] Optionally, the noise reduction centrifugal fan system for a power distribution device further includes:

[0010] Timing unit;

[0011] The timing unit is connected to the control module;

[0012] The control module is used to control the fan to stop when the temperature of the power distribution device is lower than a preset temperature value;

[0013] The control module is further configured to control the fan to operate at a first speed when the temperature of the power distribution device is greater than or equal to the preset temperature value, and to send a start timing signal to the timing unit so that the timing unit starts timing;

[0014] The timing unit is used to reset the timing and output a timing stop signal to the control module after the set timing duration ends;

[0015] The control module is also used to control the fan to increase the preset speed value based on the current speed and re-send the start timing signal to the timing unit when the temperature of the distribution device is greater than or equal to the preset temperature value and a timing stop signal is received.

[0016] Optionally, the noise reduction centrifugal fan system for a power distribution device further comprises: a sound detection unit;

[0017] The sound detection unit is connected to the control module and is used to detect the loudness of the sound emitted during the operation of the fan and output it to the control module;

[0018] The control module is used to control the fan to reduce the preset speed value based on the current speed when the loudness of the fan sound exceeds the preset loudness until the loudness of the fan sound is less than the preset loudness.

[0019] Optionally, the fan is arranged on a side of the power distribution device close to the main electrical equipment.

[0020] Optionally, the fan has an air duct, and sound-absorbing cotton is arranged in the air duct.

[0021] Optionally, folding plate sound-absorbing louvers are installed at the air inlet and outlet of the fan.

[0022] Optionally, the fan includes a cabinet, and the cabinet is made of galvanized steel plate.

[0023] The present utility model also provides a power distribution device, which includes the noise reduction centrifugal fan system for the power distribution device.

[0024] The present invention proposes a noise-reducing centrifugal fan system and a power distribution device for a power distribution device, wherein the noise-reducing centrifugal fan system includes: a temperature detection module, a fan, and a control module; the control module is respectively connected to the temperature detection module and the fan; the temperature detection module is used to detect the temperature of the power distribution device and output the temperature to the control module; the control module is used to control the fan to operate at a speed corresponding to the current power distribution device temperature when the temperature of the power distribution device is greater than a preset temperature, so as to adapt to the heat dissipation requirements of the power distribution device at different temperatures and reduce the noise of the fan. The present invention detects the temperature of the power distribution device and, when the temperature is greater than the preset temperature, controls the fan to operate at a speed corresponding to the temperature, so as to adapt to the heat dissipation requirements of the power distribution device at different temperatures and reduce the noise of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0026] Figure 1 This is a structural diagram of an embodiment of a noise reduction centrifugal fan system for a power distribution device according to the present invention;

[0027] Figure 2 This is a structural schematic diagram of another embodiment of the noise reduction centrifugal fan system for a power distribution device of the utility model;

[0028] Figure 3 This is a structural schematic diagram of another embodiment of the noise reduction centrifugal fan system for a power distribution device of the utility model;

[0029] Figure 4 These are the front and side views of a fan cabinet of an embodiment of a noise reduction centrifugal fan system for a power distribution device according to the present invention.

[0030] Description of Figure Numbers:

[0031] Label name Label name 10 fan 40 Timing unit 20 Control Module 50 Sound detection unit 30 Temperature detection module

[0032] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0035] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0036] In addition, in this utility model, the descriptions of "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0037] At present, the fan 10 installed in the power distribution device has only one speed gear when it is running: that is, after the fan 10 is started, it runs at this speed. Since there is only one speed gear, considering the heat dissipation requirements of the power distribution device under extremely hot conditions, the speed value corresponding to this speed gear is relatively high. Correspondingly, the fan 10 makes a relatively loud noise when running at this speed gear. In this way, there are two problems: the uninterrupted operation of the fan 10 will cause the power distribution device to emit a loud noise at all times, especially at night when the temperature is low. There is no need for the power distribution device to dissipate heat, and it is easy to receive complaints from surrounding residents; and the fan 10 running at a higher speed can quickly discharge the hot air in the power distribution device and reduce the temperature of the power distribution device. When the temperature of the power distribution device is within its normal operating temperature range, the fan 10 continues to run, which will waste energy.

[0038] In view of the above problems, the present invention provides a noise reduction centrifugal fan system for a power distribution device, the noise reduction centrifugal fan system comprising:

[0039] Temperature detection module 30, fan 10 and control module 20;

[0040] The control module 20 is connected to the temperature detection module 30 and the fan 10 respectively;

[0041] The temperature detection module 30 is used to detect the temperature of the power distribution device and output it to the control module 20;

[0042] The control module 20 is used to control the fan 10 to run at a speed value corresponding to the current temperature value of the power distribution device when the temperature of the power distribution device is greater than a preset temperature, so as to adapt to the heat dissipation requirements of the power distribution device at different temperatures and reduce the noise of the fan 10.

[0043] The temperature detection module 30 detects the temperature of the power distribution device. The power distribution device can be divided into indoor and outdoor power distribution devices. For indoor power distribution devices located within a power distribution station, the temperature detection module 30 can detect the temperature within the distribution station as the power distribution device temperature. Furthermore, the temperature of the switchgear and protective equipment within the power distribution device can be used as the power distribution device temperature. The temperature detection module can measure the power distribution device temperature using either a thermal resistor or a thermocouple.

[0044] A fan 10 is a device that converts mechanical energy into gas pressure and kinetic energy. It accelerates the gas and increases its pressure by rotating the impeller, thereby achieving functions such as gas transportation, ventilation, and cooling. Fans 10 can be categorized as centrifugal, axial, and mixed flow.

[0045] When the temperature of the power distribution device exceeds a preset temperature, the control module 20 controls the fan 10 to operate. The preset temperature is determined by R&D personnel; in one example, the preset temperature is 38°C. The control module 20 controls the fan 10 to operate, specifically at a speed corresponding to the temperature detected by the temperature detection module 30.

[0046] It's easy to understand that the preset temperature determines the operating temperature range of fan 10, and the speed of fan 10 directly affects the noise and vibration generated during operation. The difference between the temperature of the power distribution device and the preset temperature represents the heat dissipation requirement of the power distribution device. Therefore, the heat dissipation requirements of the power distribution device vary under different temperature conditions. It's easy to understand that the greater the difference between the temperature of the power distribution device and the preset temperature, the higher the heat dissipation requirement of the power distribution device.

[0047] In order to reduce the noise generated by the fan 10 while it is cooling the power distribution device, the fan 10 should be controlled to operate at a speed corresponding to the current power distribution device temperature. This allows the fan 10 to operate at a lower speed while meeting the heat dissipation requirements, thereby reducing the noise generated by the fan 10. It is easy to understand that the heat dissipation requirements of the power distribution device are positively correlated with the temperature of the power distribution device, and the temperature of the power distribution device is positively correlated with the speed of the fan 10.

[0048] The control module 20 may include a controller such as an MCU, an FPGA or an SOC.

[0049] The present invention proposes a noise-reducing centrifugal fan system for a power distribution device, comprising: a temperature detection module 30, a fan 10, and a control module 20; the control module 20 being connected to the temperature detection module 30 and the fan 10, respectively; the temperature detection module 30 being configured to detect the temperature of the power distribution device and output the detected temperature to the control module 20; and the control module 20 being configured to control the fan 10 to operate at a speed corresponding to the current power distribution device temperature when the power distribution device temperature is greater than a preset temperature, thereby adapting to the power distribution device's heat dissipation requirements at different temperatures and reducing the noise of the fan 10. The present invention detects the power distribution device temperature and, when the temperature is greater than a preset temperature, controls the fan 10 to operate at a speed corresponding to the temperature, thereby adapting to the power distribution device's heat dissipation requirements at different temperatures and reducing the noise of the fan 10.

[0050] Considering that the power distribution device continues to generate heat during operation, the heat generated is greater than or equal to the heat dissipated by the current power distribution device temperature corresponding to the speed of the fan 10. The temperature of the power distribution device will remain unchanged or increase. Based on the above problem, a second embodiment of the utility model is proposed. In this embodiment, the noise reduction centrifugal fan system for the power distribution device further includes:

[0051] Timing unit 40;

[0052] The timing unit 40 is connected to the control module 20;

[0053] The control module 20 is used to control the fan 10 to stop rotating when the temperature of the power distribution device is lower than a preset temperature value;

[0054] The control module 20 is further configured to control the fan 10 to operate at a first speed when the temperature of the power distribution device is greater than or equal to the preset temperature value, and to send a start timing signal to the timing unit 40 so that the timing unit 40 starts timing;

[0055] The timing unit 40 is used to reset the timing after the set timing period ends and output a timing stop signal to the control module 20;

[0056] The control module 20 is also used to control the fan 10 to increase the preset speed value based on the current speed and re-send the start timing signal to the timing unit 40 when the temperature of the distribution device is greater than or equal to the preset temperature value and a timing stop signal is received.

[0057] It should be noted that the control module 20 receives the power distribution device temperature output by the temperature detection module 30 and controls the fan 10 to stop when the power distribution device temperature is less than a preset temperature value. When the power distribution device temperature is greater than or equal to the preset temperature value, the fan 10 is controlled to operate at a first speed setting; the speed setting of the first speed setting is determined by the R&D personnel. Simultaneously, the control module 20 sends a start timing signal to the timing unit 40, causing the timing unit 40 to start timing and record the time the fan 10 has been operating at the current speed.

[0058] It is easy to understand that if the heat dissipated by the fan 10 when running at the first speed is greater than the heat generated by the power distribution device, the temperature of the power distribution device will continue to drop. A timer is set. If the temperature of the power distribution device drops below the preset temperature value within the timer, the fan 10 can meet the heat dissipation requirements of the power distribution device when running at the first speed. The timer setting is determined by the R&D personnel. In one example, the timer setting is 15 minutes.

[0059] Correspondingly, if the temperature of the power distribution device is still greater than or equal to the preset temperature value after the set timing period ends, it means that the fan 10 cannot meet the heat dissipation requirements of the power distribution device at its current speed. Specifically, the control module 20 is configured to control the fan 10 to increase the preset speed based on the current speed when the temperature of the power distribution device is greater than or equal to the preset temperature value and receives the timing stop signal, and resend the timing start signal to the timing unit 40.

[0060] If the current speed cannot meet the heat dissipation requirement, the speed of the fan 10 is increased; the fan 10 is controlled to increase the preset speed value based on the current speed to increase the heat dissipation capacity of the fan 10. In addition, to determine whether the adjusted speed of the fan 10 can meet the heat dissipation requirement of the power distribution device, the control module 20 re-sends a timing signal to the timing unit 40 to re-determine the relationship between the temperature of the power distribution device and the preset temperature value after the new timing period, and thus re-adjust the speed of the fan 10 or control the fan 10 to stop.

[0061] The timing unit 40 may be a timer.

[0062] The noise reduction centrifugal fan system for a power distribution device further includes: a sound detection unit 50;

[0063] The sound detection unit 50 is connected to the control module 20 and is used to detect the loudness of the sound emitted by the fan 10 during operation and output it to the control module 20;

[0064] The control module 20 is configured to control the fan 10 to reduce a preset speed value based on the current speed when the loudness of the fan 10 sound exceeds a preset loudness until the loudness of the fan 10 sound is less than the preset loudness.

[0065] To prevent the fan 10 from generating excessive noise during operation, which could lead to complaints from surrounding residents, the sound detection unit 50 detects the loudness of the fan 10 during operation. Specifically, it obtains the amplitude of the noise waveform generated by the fan 10 during operation. If the loudness of the fan 10 sound exceeds a preset loudness, the control module 20 reduces the speed of the fan 10. Specifically, it controls the fan 10 to reduce the preset speed value based on the current speed until the loudness of the fan 10 sound is less than the preset loudness. The preset loudness is determined by R&D personnel.

[0066] The sound detection unit 50 may include a microphone.

[0067] In the prior art, the fan 10 is installed at the door of the power distribution station. In order to reduce the noise transmitted by the fan 10 to the surrounding residents and improve the heat dissipation efficiency, the fan 10 is installed on the side of the power distribution device close to the main electrical equipment.

[0068] The fan 10 includes an air duct, which is filled with sound-absorbing cotton. The air duct's primary function is to guide the airflow generated by the fan 10 in a specific direction. This ensures that the airflow is effectively delivered to the desired location, improving the operating efficiency of the fan 10. The air duct can be circular, rectangular, or spiral.

[0069] Sound-absorbing cotton effectively absorbs the noise energy generated by airflow within the duct. As sound propagates through the duct, the cotton's porous structure and fibrous material cause the sound waves to continuously reflect, refract, and rub against each other, converting the sound energy into heat and reducing noise. Furthermore, when the fan 10 is operating, the high-speed flow of air within the duct generates aerodynamic noise. The sound-absorbing cotton reduces airflow turbulence and eddies, lowering friction between the air and the duct wall, thereby reducing the generation of aerodynamic noise.

[0070] Folding plate silencer louvers are installed at the air inlet and outlet of the fan 10. The interior of the folding plate silencer louvers is usually filled with sound-absorbing materials, such as glass fiber, rock wool, etc. These sound-absorbing materials can effectively absorb the noise generated at the air inlet and outlet of the fan 10, reducing the propagation and diffusion of the noise. The structural design of the folding plate can cause the noise to be reflected and scattered when passing through the louvers, changing the propagation direction of the noise, thereby reducing the noise energy directly transmitted to the surrounding environment. In addition, when the fan 10 is running, the high-speed flow of air at the air inlet and outlet will generate aerodynamic noise. The folding plate silencer louvers can reduce the turbulence and vortex of the air flow by adjusting the speed and direction of the air flow, thereby reducing the generation of aerodynamic noise.

[0071] like Figure 4 As shown, the fan 10 includes a cabinet body, which is made of galvanized steel plate and has corrosion resistance.

[0072] The present utility model also proposes a power distribution device, which includes the noise reduction centrifugal fan system for the power distribution device. The specific structure of the noise reduction centrifugal fan system for the power distribution device refers to the above-mentioned embodiment. Since the power distribution device adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0073] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by utilizing the contents of the present invention specification and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A noise reduction centrifugal fan system for a power distribution device, characterized in that: The noise reduction centrifugal fan system comprises: Temperature detection module, fan and control module; The control module is connected to the temperature detection module and the fan respectively; The temperature detection module is used to detect the temperature of the power distribution device and output it to the control module; The control module is used to control the fan to run at a speed value corresponding to the current temperature value of the distribution device when the temperature of the distribution device is greater than a preset temperature, so as to adapt to the heat dissipation requirements of the distribution device at different temperatures and reduce the noise of the fan.

2. The noise reduction centrifugal fan system for a power distribution device according to claim 1, characterized in that: The noise reduction centrifugal fan system for a power distribution device further comprises: Timing unit; The timing unit is connected to the control module; The control module is used to control the fan to stop when the temperature of the power distribution device is lower than a preset temperature value; The control module is further configured to control the fan to operate at a first speed when the temperature of the power distribution device is greater than or equal to the preset temperature value, and to send a start timing signal to the timing unit so that the timing unit starts timing; The timing unit is used to reset the timing and output a timing stop signal to the control module after the set timing duration ends; The control module is also used to control the fan to increase the preset speed value based on the current speed and re-send the start timing signal to the timing unit when the temperature of the distribution device is greater than or equal to the preset temperature value and a timing stop signal is received.

3. The noise reduction centrifugal fan system for a power distribution device according to claim 2, characterized in that: The noise reduction centrifugal fan system for a power distribution device further includes: a sound detection unit; The sound detection unit is connected to the control module and is used to detect the loudness of the sound emitted during the operation of the fan and output it to the control module; The control module is used to control the fan to reduce the preset speed value based on the current speed when the loudness of the fan sound exceeds the preset loudness until the loudness of the fan sound is less than the preset loudness.

4. The noise reduction centrifugal fan system for a power distribution device according to any one of claims 1 to 3, characterized in that: The fan is arranged on one side of the power distribution device close to the main electrical equipment.

5. The noise reduction centrifugal fan system for a power distribution device according to claim 4, characterized in that: The fan has an air duct, and sound-absorbing cotton is arranged in the air duct.

6. The noise reduction centrifugal fan system for a power distribution device according to claim 4, characterized in that: Folding plate sound-absorbing louvers are installed at the air inlet and outlet of the fan.

7. The noise reduction centrifugal fan system for a power distribution device according to claim 4, characterized in that: The fan comprises a cabinet body, which is made of galvanized steel plate.

8. A power distribution device, characterized in that: The power distribution device includes the noise reduction centrifugal fan system for a power distribution device according to any one of claims 1 to 7.

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