Wireless sensing switch cabinet heat dissipation system and control method

Abstract

The invention discloses a wireless sensing switch cabinet heat dissipation system and a control method. A controller is in wireless communication connection with a wireless temperature sensor, a wireless temperature and humidity sensor and a wireless partial discharge sensor; the moving contact temperature, the environment temperature, the environment humidity and the partial discharge level can be measured; the wireless receiving gateway is arranged in the controller and is in wireless communication connection with the wireless temperature sensor, the wireless temperature and humidity sensor and the wireless partial discharge sensor, and the controller is used for controlling the refrigeration air supply drying equipment to generate dry cold air according to the moving contact temperature, the environment temperature, the environment humidity and the partial discharge level. And the air is input to the cabinet bottom of the switch cabinet through the air supply pipeline. The advantages of wireless sensing are utilized, a cable conductor is not needed, high voltage in a moving contact arm of the switch cabinet and a cabinet body is prevented from being led to a cabinet body shell, the insulation performance is improved, the electric shock danger of a person is prevented, meanwhile, rapid cooling of the switch cabinet can be achieved, the cooling effect and the heat dissipation efficiency are improved, and safe operation of electric equipment is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of switch cabinets, and in particular to a wireless sensing switch cabinet heat dissipation system and control method. Background Art

[0002] During peak electricity consumption periods, the load on the switch cabinets of indoor substations will increase dramatically. The increase in load will cause the circuit breaker to generate a large amount of heat. In order to ensure the safe and stable operation of the switch cabinet, this heat needs to be discharged in a timely manner.

[0003] In the prior art, conventional air-conditioning closed cooling is usually used to dissipate heat from the switch cabinet. Figure 1 , the distribution cabinet inhales air from the front and back of the cabinet body, and the heat inside the distribution cabinet is taken away and discharged into the room through the cabinet top fan, thereby forming a cyclonic vortex area with high temperature and high pressure in the upper part of the distribution cabinet room, and forming a negative pressure area in the front part of the distribution cabinet. However, it has been found through research that in actual operation, the upper area on the front of the switch cabinet power cabinet actually inhales the hot air just discharged for cooling, forming an air flow short-circuit wind that cannot achieve an effective cooling effect. Moreover, since the prior art uses air conditioning, the air conditioner usually adopts a bottom-in and top-out structure, which forms a "wind grabbing" phenomenon with the switch cabinet to a certain extent, forming a "mixed circulation area". In this area, the air inhaled by the switch cabinet is not entirely the cold air after the air conditioner has cooled down, and the cooling treatment of the air conditioner has not completely cooled down the hot air discharged from the switch cabinet, resulting in low operating efficiency of the entire cooling system.

[0004] Therefore, the heat dissipation method of the switch cabinet in the prior art has the problems of poor cooling effect and low heat dissipation efficiency. Summary of the invention

[0005] The present application provides a wireless sensing switch cabinet heat dissipation system and control method, which can achieve rapid cooling of the switch cabinet, improve the cooling effect and heat dissipation efficiency, and ensure the safe operation of electrical equipment.

[0006] In a first aspect, an embodiment of the present application provides a wireless sensing switch cabinet heat dissipation system, including a refrigeration air supply drying device, a wireless temperature sensor, a wireless temperature and humidity sensor, a wireless partial discharge sensor, an air supply duct and a controller;

[0007] The controller is connected to the refrigeration air supply drying equipment, and is respectively connected to the wireless temperature sensor, the wireless temperature and humidity sensor, and the wireless partial discharge sensor through a wireless gateway communication;

[0008] One end of the air supply duct is connected to the refrigeration air supply drying equipment, and the other end is connected to the bottom of the switch cabinet;

[0009] The wireless temperature sensor is installed on the moving contact arm of the switch cabinet to measure the temperature of the moving contact;

[0010] The wireless temperature and humidity sensor is installed at the bottom of the cable room of the switch cabinet to measure the ambient temperature and humidity;

[0011] The wireless partial discharge sensor is installed on the outer wall of the switch cabinet to measure the partial discharge level;

[0012] The controller is used to control the refrigeration air supply drying equipment to generate dry cold air according to the moving contact temperature, ambient temperature, ambient humidity and partial discharge level, and input the dry cold air into the bottom of the switch cabinet through the air supply duct.

[0013] Furthermore, the refrigeration air supply drying device comprises a first air supply module and a second air supply module; the second air supply module, the first air supply module and the air supply duct are connected in sequence;

[0014] A control switch and a control valve are provided between the first air supply module and the second air supply module; the controller is also used to control the opening and closing of the control switch and the opening of the control valve according to the moving contact temperature, ambient temperature, ambient humidity and partial discharge level.

[0015] Furthermore, the first air supply module includes a first dehumidification unit and a first outdoor fan; the second air supply module includes a second dehumidification unit and a second outdoor fan; the control switch and the control valve are both arranged between the first dehumidification unit and the second dehumidification unit;

[0016] The first dehumidification unit, the first outdoor fan, the second dehumidification unit, and the second outdoor fan are respectively connected to the controller; the controller is used to control the start and stop of the first dehumidification unit, the first outdoor fan, the second dehumidification unit, and the second outdoor fan according to the moving contact temperature, ambient temperature, ambient humidity and partial discharge level.

[0017] Furthermore, the air outlet end of the first outdoor fan faces the windward surface of the first dehumidification unit; the air outlet end of the second outdoor fan faces the windward surface of the second dehumidification unit.

[0018] Furthermore, an air volume valve is provided in the air supply duct; the air volume valve is used to control the on-off of the air supply duct.

[0019] Furthermore, an air supply filter is provided in the air supply duct;

[0020] The air supply filter is used to filter impurities in the dry cold air produced by the refrigeration air supply drying equipment.

[0021] Furthermore, a mounting frame is provided at the pipe opening at one end of the air supply pipe connected to the refrigeration air supply drying equipment; a sealing gasket is provided on the mounting frame which is sealingly connected to the edge of the pipe opening, and the air supply filter is clamped in the mounting frame of the pipe opening through the sealing gasket.

[0022] In a second aspect, an embodiment of the present application provides a wireless sensing switch cabinet heat dissipation control method, which is applied to the wireless sensing switch cabinet heat dissipation system in the above embodiment, including:

[0023] If it is detected that the moving contact temperature is greater than the first moving contact threshold, the first outdoor fan is started;

[0024] If it is detected that the ambient temperature is greater than the first temperature threshold, the ambient humidity is greater than the first humidity threshold, or the partial discharge level is greater than the first partial discharge threshold, the first outdoor fan and the first dehumidification unit are started.

[0025] Furthermore, if it is detected that the moving contact temperature is greater than the second moving contact threshold, the second outdoor fan and the control switch are started, and the opening of the control valve is determined according to the moving contact temperature; the second moving contact threshold is greater than the first moving contact threshold.

[0026] Furthermore, if it is detected that the ambient temperature is greater than a second temperature threshold, the ambient humidity is greater than a second humidity threshold, or the partial discharge level is greater than a second partial discharge threshold, the second outdoor fan, the second dehumidification unit and the control switch are started, and the opening of the control valve is determined according to the ambient temperature, ambient humidity or the partial discharge level; the second temperature threshold is greater than the first temperature threshold, the second humidity threshold is greater than the first humidity threshold, and the second partial discharge threshold is greater than the first partial discharge threshold.

[0027] In summary, compared with the prior art, the technical solution provided in the embodiment of the present application has at least the following beneficial effects:

[0028] The embodiment of the present application provides a wireless sensing switch cabinet heat dissipation system and control method, which measures the moving contact temperature through a wireless temperature sensor, measures the ambient temperature and ambient humidity through a wireless temperature and humidity sensor, measures the partial discharge level through a wireless partial discharge sensor, and then uses a controller to control the connected refrigeration air supply and drying equipment to produce dry cold air according to the moving contact temperature, ambient temperature, ambient humidity and partial discharge level, and inputs the dry cold air into the bottom of the switch cabinet through the air supply duct. The present application also selects parameter indicators such as the ambient temperature and humidity, the moving contact temperature and the partial discharge level in the switch cabinet, so that the heat dissipation control is more accurate and effective; at the same time, the air supply duct is connected to the bottom of the switch cabinet, so that the dry cold air can discharge the air in the cabinet through the positive pressure of the air duct, thereby realizing the rapid cooling of the switch cabinet, improving the cooling effect and heat dissipation efficiency, and ensuring the safe operation of electrical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of a heat dissipation method of a switch cabinet in the prior art is provided as an exemplary embodiment of the present application.

[0030] Figure 2 A schematic diagram of the positions of various sensors in a switch cabinet provided for an exemplary embodiment of the present application.

[0031] Figure 3 A schematic diagram of a refrigeration air supply drying device and an air supply duct provided for an exemplary embodiment of the present application.

[0032] Figure 4 A schematic diagram of the air flow direction inside a switch cabinet provided as an exemplary embodiment of the present application.

[0033] Description of reference numerals:

[0034] 1. Controller; 2. Refrigeration air supply and drying equipment; 3. Air supply duct; 4. Wireless temperature sensor; 5. Wireless temperature and humidity sensor; 6. Wireless partial discharge sensor; 7. Switch cabinet; 32. Air volume valve; 21. First dehumidification unit; 22. Second dehumidification unit; 23. First outdoor fan; 24. Second outdoor fan; 25. Control valve; 26. Control switch. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0036] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0037] In the description of this application, the terms "first", "second", "third", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", "third", etc. may explicitly or implicitly include one or more of the feature. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0038] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between the two elements. The terms "vertical", "horizontal", "left", "right", "upper", "lower" and similar expressions used herein are only for illustrative purposes, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] In the description of this application, it should be noted that, unless otherwise defined, all technical and scientific terms used in the present invention have the same meaning as those commonly understood by those skilled in the art. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0040] See also Figure 2 and Figure 3 The embodiment of the present application provides a wireless sensing switch cabinet heat dissipation system, including a controller 1, a refrigeration air supply and drying device 2, an air supply duct 3, a wireless temperature sensor 4, a wireless temperature and humidity sensor 5 and a wireless partial discharge sensor 6; the controller 1 is connected to the refrigeration air supply and drying device 2, and is respectively connected to the wireless temperature sensor 4, the wireless temperature and humidity sensor 5 and the wireless partial discharge sensor 6 through a wireless gateway communication.

[0041] One end of the air supply duct 3 is connected to the refrigeration air supply drying equipment 2 , and the other end is connected to the bottom of the switch cabinet 7 .

[0042] The wireless temperature sensor 4 is arranged on the moving contact arm of the switch cabinet 7 and is used to measure the temperature of the moving contact.

[0043] The wireless temperature and humidity sensor 5 is arranged at the bottom of the cable room of the switch cabinet 7 and is used to measure the ambient temperature and humidity.

[0044] The wireless partial discharge sensor 6 is arranged on the outer wall of the switch cabinet 7 and is used to measure the partial discharge level.

[0045] Among them, the characteristic of wireless sensing is that it does not use cable conductors, which avoids the high voltage in the moving contact arm of the switch cabinet and the cabinet body being led to the cabinet shell, improves the insulation performance, and prevents the risk of electric shock.

[0046] The controller 1 is used to control the refrigeration air supply drying device 2 to generate dry cold air according to the moving contact temperature, ambient temperature, ambient humidity and partial discharge level, and input the dry cold air into the bottom of the switch cabinet 7 through the air supply duct 3.

[0047] The controller 1 is integrated with a related main control chip. Preferably, an SCM325 main control chip is adopted, which integrates an SM7 national secret security algorithm module and a 400-510MHz 20dBm wireless radio frequency communication module, and the wireless modulation mode is SC-IOT.

[0048] The wireless temperature sensor 4 preferably adopts a CT-like induction power supply method to obtain an AC3V AC voltage from the induction coil, rectifies it to DC5V through a diode full-bridge, and steps it down to DC3.3V through an LDO voltage regulator chip for use by the main control chip.

[0049] The wireless temperature and humidity sensor 5 and the wireless partial discharge sensor 6 are powered by a DC3.6V disposable lithium-ion battery, and the LDO is stepped down to DC3.3V for use by the main control chip and peripheral devices.

[0050] The partial discharge level measured by the wireless partial discharge sensor 6 includes the peak-to-peak value of the ultrasonic partial discharge signal, the peak-to-peak value of the ultra-high frequency partial discharge signal, and the peak-to-peak value of the ground electric wave partial discharge signal of the switch cabinet 7.

[0051] Specifically, the wireless temperature sensor 4, the wireless temperature and humidity sensor 5, and the wireless partial discharge sensor 6 all communicate with the controller 1 through the wireless receiving gateway; the wireless receiving gateway collects data and reports the status to the background server, with a total of 4 channels, 3 data channels are used to receive the measurement data of each sensor, and 1 control channel receives the control instructions of the controller 1. The main control chip first requests the key from the wireless receiving gateway in the control channel, and after obtaining the key, it encrypts and transmits the control instructions according to the key. The wireless receiving gateway transmits the sensor data to the main control chip or the background server through the network cable. The main control chip or server performs normalization processing based on the received moving contact temperature, ambient temperature, ambient humidity and partial discharge level, and then makes a fusion decision to determine the corresponding switch cabinet 7 The air supply volume and air supply temperature, so as to achieve the effect of precise air supply temperature control and improve the switch cabinet environment.

[0052] See also Figure 3 In the specific implementation process, the controller 1 can receive sensor data from multiple switch cabinets, and control the corresponding switch cabinets to cool down and dissipate heat according to the sensor data. The number of controlled switch cabinets is determined by actual design requirements.

[0053] Preferably, the controller 1 can also be arranged in the background server together with the wireless receiving gateway. The background server determines the air supply volume and air supply temperature of the cabinet according to the received moving contact temperature, ambient temperature, ambient humidity, and partial discharge level after normalization and fusion decision, so as to achieve the effect of precise air supply temperature control and improvement of the switch cabinet environment. For example, if it is detected that the moving contact temperature exceeds 70 degrees, the air supply mode is turned on. If the moving contact temperature continues to rise, the air supply volume is increased and the air supply temperature is reduced to quickly cool the switch cabinet. For example, if the humidity of the switch cabinet is too high, dry air can be sent into the cabinet and the humid air can be pressed out of the cabinet. For example, if the partial discharge level of the switch cabinet is high, dry air can be sent into the cabinet to improve the partial discharge level, etc.

[0054] The wireless temperature sensor 4, wireless temperature and humidity sensor 5 and wireless partial discharge sensor 6 in the above embodiment provide data support for multi-terminal perception, and provide a basis for judgment for the precise air supply system. The national secret security algorithm in the controller 1 ensures the communication security of wireless data. The switch cabinet heat dissipation system in the above embodiment can directly deliver dry cold air to the corresponding switch cabinet through the air duct. The dry cold air can not only reduce the temperature, but also dehumidify and improve the partial discharge performance of the switch cabinet.

[0055] Also, see Figure 4 , because of the use of air ducts to deliver air, the previous cold air delivered by the air conditioner must first cool down the entire machine room environment before the heat of the communication equipment can be exchanged for heat, making the whole process more direct. And because the air duct adopts a controllable design, the amount of cold air delivered can be adjusted according to the degree of heat generated by the communication equipment, reducing the loss of cold. It can also increase or decrease the number of air duct outlets accordingly as the number of communication equipment increases or decreases, making the cooling capacity of the heat dissipation system more targeted and practical, and improving the economy of the entire system. And the switch cabinet 7 itself is an energy-saving and power-saving device. The commonly used air-conditioning cooling is prone to secondary waste of energy. The air duct is set at the bottom of the switch cabinet 7 to ensure that all cold air passes through the switch cabinet 7, which guarantees the utilization rate of cold air resources to the greatest extent and avoids energy waste.

[0056] The above embodiment provides a wireless sensing switch cabinet heat dissipation system, which measures the moving contact temperature through a wireless temperature sensor 4, measures the ambient temperature and humidity through a wireless temperature and humidity sensor 5, measures the partial discharge level through a wireless partial discharge sensor 6, and then uses a controller 1 to control the connected refrigeration air supply and drying equipment 2 to generate dry cold air according to the moving contact temperature, ambient temperature, ambient humidity and partial discharge level, and inputs the dry cold air into the bottom of the switch cabinet through the air supply duct 3. This application also uses parameter indicators such as ambient temperature and humidity, moving contact temperature and partial discharge level in the switch cabinet, so that the heat dissipation control is more accurate and effective; at the same time, the air supply duct 3 is connected to the bottom of the switch cabinet, so that the dry cold air can discharge the air in the cabinet through the positive pressure of the air duct, thereby realizing rapid cooling of the switch cabinet, improving the cooling effect and heat dissipation efficiency, and ensuring the safe operation of electrical equipment.

[0057] See also Figure 3 In some embodiments, the refrigeration air supply and drying equipment 2 includes a first air supply module and a second air supply module; the second air supply module, the first air supply module and the air supply duct 3 are connected in sequence.

[0058] A control switch 26 and a control valve 25 are provided between the first air supply module and the second air supply module; the controller 1 is also used to control the opening and closing of the control switch 26 and the opening degree of the control valve 25 according to the moving contact temperature, ambient temperature, ambient humidity and partial discharge level.

[0059] Figure 3 The five systems connected to the controller 1 are all switch cabinets using the heat dissipation system of the present application; the two on the left are simplified switch cabinets 7 and air supply ducts 3, and only the internal structure diagram of the refrigeration air supply drying equipment in the heat dissipation system is drawn; the three on the right are switch cabinets 7 and air supply ducts 3, and the refrigeration air supply drying equipment is omitted; Figure 3 A in the figure is the bottom of the switch cabinet 7.

[0060] Furthermore, the first air supply module includes a first dehumidification unit 21 and a first outdoor fan 23; the second air supply module includes a second dehumidification unit 22 and a second outdoor fan 24; the control switch 26 and the control valve 25 are both arranged between the first dehumidification unit 21 and the second dehumidification unit 22; the first dehumidification unit 21, the first outdoor fan 23, the second dehumidification unit 22, and the second outdoor fan 24 are respectively connected to the controller 1; the controller 1 is used to control the start and stop of the first dehumidification unit 21, the first outdoor fan 23, the second dehumidification unit 22, and the second outdoor fan 24 according to the moving contact temperature, ambient temperature, ambient humidity and partial discharge level.

[0061] Specifically, the control switch 26 and the control valve 25 are respectively connected between the first dehumidification unit 21 and the second dehumidification unit 22, that is, one end of the control valve 25 is connected to one end of the first dehumidification unit 21, and the other end of the control valve 25 is connected to one end of the second dehumidification unit 22; one end of the control switch 26 is connected to the other end of the first dehumidification unit 21, and one end of the control switch 26 is connected to the other end of the second dehumidification unit 22.

[0062] Furthermore, an air outlet end of the first outdoor fan 23 faces the windward surface of the first dehumidification unit 21 ; and an air outlet end of the second outdoor fan 24 faces the windward surface of the second dehumidification unit 22 .

[0063] The design of the two air supply modules and the period control valve 25 and the control switch 26 in the above embodiment makes the upper and lower limits of the air supply volume of the refrigeration air supply drying device 2 larger, so that the controller 1 can achieve more accurate air volume control.

[0064] See also Figure 3 In some embodiments, an air volume valve 32 is provided in the air supply duct 3.

[0065] The air volume valve 32 is used to control the on-off of the air supply duct 3 .

[0066] In specific implementation, the number, position and model of the air volume valve 32 are determined by actual product design requirements.

[0067] In some embodiments, an air supply filter is provided in the air supply duct 3 .

[0068] The air supply filter is used to filter impurities in the dry cold air produced by the refrigeration air supply drying equipment.

[0069] The air supply filter in the above embodiment can filter the incoming air quality to avoid the presence of impurities with too large particles in the cold air, which may cause unnecessary pipeline blockage risks. The number, position and model of the air supply filter are determined by actual product design requirements.

[0070] In some embodiments, a mounting frame is provided at the pipe opening at one end of the air supply pipe 3 connected to the refrigeration air supply drying equipment 2 .

[0071] The installation frame is provided with a sealing gasket which is sealed with the edge of the pipe opening, and the air supply filter is clamped in the installation frame of the pipe opening through the sealing gasket. The material of the sealing gasket is determined by the actual product design requirements.

[0072] The snap-on design in the above embodiment facilitates filter replacement and prevents impurities on the filter from clogging the air supply duct after long-term use.

[0073] Another embodiment of the present application provides a wireless sensing switch cabinet heat dissipation control method, which is applied to the wireless sensing switch cabinet heat dissipation system in the above embodiment, and is specifically applied to a controller of the switch cabinet heat dissipation system; the method includes:

[0074] If it is detected that the moving contact temperature is greater than the first moving contact threshold, the first outdoor fan is started.

[0075] If it is detected that the ambient temperature is greater than the first temperature threshold, the ambient humidity is greater than the first humidity threshold, or the partial discharge level is greater than the first partial discharge threshold, the first outdoor fan and the first dehumidification unit are started.

[0076] Furthermore, if it is detected that the moving contact temperature is greater than the second moving contact threshold, the second outdoor fan and the control switch are started, and the opening of the control valve is determined according to the moving contact temperature; the second moving contact threshold is greater than the first moving contact threshold.

[0077] Furthermore, if it is detected that the ambient temperature is greater than a second temperature threshold, the ambient humidity is greater than a second humidity threshold, or the partial discharge level is greater than a second partial discharge threshold, the second outdoor fan, the second dehumidification unit and the control switch are started, and the opening of the control valve is determined according to the ambient temperature, ambient humidity or the partial discharge level; the second temperature threshold is greater than the first temperature threshold, the second humidity threshold is greater than the first humidity threshold, and the second partial discharge threshold is greater than the first partial discharge threshold.

[0078] Among them, the first moving contact threshold, the first temperature threshold, the first humidity threshold, the first partial discharge threshold, the second moving contact threshold, the second temperature threshold, the second humidity threshold and the second partial discharge threshold are all artificially set in the controller.

[0079] Specifically, the relationship between the opening of the control valve and the corresponding parameters can also be realized by a manually designed interval table; for example, the second moving contact threshold is 70°C, when the moving contact temperature is 70°C-75°C, the opening of the control valve is 20%; when the moving contact temperature is 75°C-80°C, the opening of the control valve is 50%, etc. The openings corresponding to other parameters can also be set in this way.

[0080] In the above embodiments, accurate control of the air supply volume is achieved by setting different threshold values, which avoids waste of resources and can quickly cool and dissipate heat in the switch cabinet to ensure safe electricity use.

[0081] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0082] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A wireless sensing switch cabinet heat dissipation system, characterized in that: Including refrigeration air supply and drying equipment, wireless temperature sensor, wireless temperature and humidity sensor, wireless partial discharge sensor, air supply duct and controller; The controller is connected to the refrigeration air supply and drying equipment, and is respectively connected to the wireless temperature sensor, the wireless temperature and humidity sensor, and the wireless partial discharge sensor through a wireless gateway communication; One end of the air supply duct is connected to the refrigeration air supply drying equipment, and the other end is connected to the bottom of the switch cabinet; The wireless sensing includes but is not limited to wireless temperature sensors, wireless temperature and humidity sensors, and wireless partial discharge sensors; The wireless temperature sensor is arranged on the moving contact arm of the switch cabinet and is used to measure the temperature of the moving contact; The wireless temperature and humidity sensor is arranged at the bottom of the cable room of the switch cabinet and is used to measure the ambient temperature and humidity; The wireless partial discharge sensor is arranged on the outer wall of the switch cabinet and is used to measure the partial discharge level; The controller is used to control the refrigeration air supply and drying equipment to generate dry cold air according to the moving contact temperature, the ambient temperature, the ambient humidity and the partial discharge level, and input the dry cold air into the bottom of the switch cabinet through the air supply duct.

2. The wireless sensing switch cabinet heat dissipation system according to claim 1 is characterized in that: The refrigeration air supply and drying equipment comprises a first air supply module and a second air supply module; The second air supply module, the first air supply module and the air supply duct are connected in sequence; A control switch and a control valve are provided between the first air supply module and the second air supply module; The controller is also used to control the opening and closing of the control switch and the opening degree of the control valve according to the moving contact temperature, the ambient temperature, the ambient humidity and the partial discharge level.

3. The wireless sensing switch cabinet heat dissipation system according to claim 2 is characterized in that: The first air supply module includes a first dehumidification unit and a first outdoor fan; the second air supply module includes a second dehumidification unit and a second outdoor fan; The control switch and the control valve are both arranged between the first dehumidification unit and the second dehumidification unit; The first dehumidification unit, the first outdoor fan, the second dehumidification unit, and the second outdoor fan are respectively connected to the controller; the controller is used to control the start and stop of the first dehumidification unit, the first outdoor fan, the second dehumidification unit, and the second outdoor fan according to the moving contact temperature, the ambient temperature, the ambient humidity and the partial discharge level.

4. The wireless sensing switch cabinet heat dissipation system according to claim 3 is characterized in that: The air outlet end of the first outdoor fan faces the windward surface of the first dehumidification unit; An air outlet end of the second outdoor fan faces a windward surface of the second dehumidification unit.

5. The wireless sensing switch cabinet heat dissipation system according to claim 1 is characterized in that: An air volume valve is arranged in the air supply duct; the air volume valve is used to control the on-off of the air supply duct.

6. The wireless sensing switch cabinet heat dissipation system according to claim 1 is characterized in that: An air supply filter is arranged in the air supply duct; the air supply filter is used to filter impurities contained in the dry cold air generated by the refrigeration air supply drying equipment.

7. The wireless sensing switch cabinet heat dissipation system according to claim 6 is characterized in that: A mounting frame is provided at the pipe opening at one end of the air supply pipe connected to the refrigeration air supply drying equipment; a sealing gasket is provided on the mounting frame and is sealed to the edge of the pipe opening, and the air supply filter is clamped in the mounting frame of the pipe opening through the sealing gasket.

8. A wireless sensing switch cabinet heat dissipation control method, characterized in that: The switch cabinet heat dissipation system for wireless sensing as claimed in any one of claims 3 to 7 comprises: If it is detected that the moving contact temperature is greater than the first moving contact threshold, the first outdoor fan is started; If it is detected that the ambient temperature is greater than a first temperature threshold, the ambient humidity is greater than a first humidity threshold, or the partial discharge level is greater than a first partial discharge threshold, the first outdoor fan and the first dehumidification unit are started.

9. The wireless sensing switch cabinet heat dissipation control method according to claim 8, characterized in that: Also includes: If it is detected that the moving contact temperature is greater than the second moving contact threshold, the second outdoor fan and the control switch are started, and the opening of the control valve is determined according to the moving contact temperature; the second moving contact threshold is greater than the first moving contact threshold.

10. The wireless sensing switch cabinet heat dissipation control method according to claim 8, characterized in that: Also includes: If it is detected that the ambient temperature is greater than a second temperature threshold, the ambient humidity is greater than a second humidity threshold, or the partial discharge level is greater than a second partial discharge threshold, the second outdoor fan, the second dehumidification unit, and the control switch are started, and the opening of the control valve is determined according to the ambient temperature, the ambient humidity, or the partial discharge level; The second temperature threshold is greater than the first temperature threshold, the second humidity threshold is greater than the first humidity threshold, and the second partial discharge threshold is greater than the first partial discharge threshold.

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