CN209029753U - An anti-condensation distribution box - Google Patents
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Abstract
Description
技术领域technical field
本实用新型涉及电力柜体除湿处理技术领域，特别涉及一种防冷凝配电箱。The utility model relates to the technical field of dehumidification treatment of power cabinets, in particular to an anti-condensation distribution box.
背景技术Background technique
在电力行业中，变电站室外箱很容易受到外界环境因素的影响，尤其是在潮湿环境下，容易产生凝露现象，使得绝缘减小，存在一定的安全隐患。传统的处事方式一般采用加热除湿的方法达到防凝露的目的，加热除湿的主要原理是提高空气温度可以增加空气的吸湿量，提高箱内设备的干燥度，降低箱内的相对湿度，但此种办法不能降低空气的绝对含湿量，在绝对含湿量不变的情况下，如果湿空气被冷却(昼夜温差或加热器退出)，柜内的相对湿度就会上升并达到饱和，温度继续下降，这时就会产生凝露凝结在设备表面，破坏绝缘，发生闪络、短路或击窜现象，影响电网的安全运行。再者过热是电器设备常见的故障，一方面是由电器设备工作产生的热量，还有一方面是所处环境的热量，因此通过加热除湿提高环境温度也容易影响电器设备的使用寿命，导致电器故障。In the power industry, the outdoor box of the substation is easily affected by external environmental factors, especially in a humid environment, condensation is easy to occur, which reduces the insulation and poses certain safety hazards. The traditional way of doing things generally adopts the method of heating and dehumidification to achieve the purpose of preventing condensation. The main principle of heating and dehumidification is that increasing the air temperature can increase the moisture absorption of the air, improve the dryness of the equipment in the box, and reduce the relative humidity in the box. This method cannot reduce the absolute moisture content of the air. Under the condition that the absolute moisture content remains unchanged, if the humid air is cooled (the temperature difference between day and night or the heater is withdrawn), the relative humidity in the cabinet will rise and reach saturation, and the temperature will continue to When it drops, condensation will condense on the surface of the equipment, damage the insulation, and cause flashover, short circuit or smashing phenomenon, affecting the safe operation of the power grid. In addition, overheating is a common fault of electrical equipment. On the one hand, it is the heat generated by the operation of electrical equipment, and on the other hand, it is the heat of the environment. Therefore, increasing the ambient temperature by heating and dehumidification can also easily affect the service life of electrical equipment. Fault.
中国专利公开号CN 104752973 B，授权公告日2018年01月05日，实用新型创造的名称为防凝露的自动电柜除湿器，该申请案公开了一种防凝露的自动电柜除湿器，包括：壳体，设于壳体内的冷凝组件、加热器、控制模块、温湿度传感器以及风扇。冷凝组件、加热器、温湿度传感器、风扇均与控制模块相连。的防凝露自动电柜除湿器使用时，当控制模块通过温湿度传感器监测到柜内环境湿度高于设定除湿阀值时，先控制风扇和加热器开始工作，将电柜内的空气升温至预设温度，以气化电柜中的凝露；当控制模块控制加热器停止工作并开启冷凝组件制冷时，控制风扇间歇工作，将电柜内水汽液化排出；当控制模块监测到柜内环境湿度低于设定除湿阀值时，冷凝组件与风扇就停止工作。其不足之处在于通过加热除湿提高环境温度容易影响电器设备的使用。Chinese Patent Publication No. CN 104752973 B, the authorization announcement date is January 5, 2018, the name of the utility model is an automatic electric cabinet dehumidifier with anti-condensation, and the application discloses an automatic electric cabinet dehumidifier with anti-condensation , including: a casing, a condensing assembly, a heater, a control module, a temperature and humidity sensor and a fan arranged in the casing. The condensing components, heaters, temperature and humidity sensors, and fans are all connected to the control module. When the anti-condensation automatic electric cabinet dehumidifier is used, when the control module detects that the ambient humidity in the cabinet is higher than the set dehumidification threshold through the temperature and humidity sensor, it first controls the fan and heater to start to work to warm the air in the electric cabinet. to the preset temperature to vaporize the condensation in the electrical cabinet; when the control module controls the heater to stop working and turns on the condensing component for cooling, it controls the fan to work intermittently to liquefy and discharge the water vapor in the electrical cabinet; when the control module monitors the inside of the cabinet When the ambient humidity is lower than the set dehumidification threshold, the condensing components and fans will stop working. The disadvantage is that the use of electrical equipment is easily affected by raising the ambient temperature by heating and dehumidification.
实用新型内容Utility model content
本实用新型的一个目的在于解决上述现有技术存在的加热除湿方式提高环境温度容易影响电器设备的使用寿命，可能导致电器故障的问题，提供一种不同于现有配电箱的硬件配置，使技术人员能够在这样的硬件配置下进一步开发实现有效防凝露的目的，提供了一种防冷凝配电箱。One purpose of the present utility model is to solve the problem that the heating and dehumidification method existing in the above-mentioned prior art can easily affect the service life of electrical equipment and may lead to electrical equipment failure by increasing the ambient temperature, and to provide a hardware configuration different from the existing distribution box, so that the Technicians can further develop and achieve the purpose of effective anti-condensation under such hardware configuration, and provide an anti-condensation distribution box.
本实用新型解决其技术问题所采用的技术方案是：一种防冷凝配电箱，包括用于检测箱内温度的内温度传感器；用于检测箱外温度的外温度传感器；用于检测箱内压力的压力传感器；用于检测当前环境下露点的露点检测装置；用于调节箱内气压的压力调节装置；用于检测箱内湿度的内湿度检测装置，用于检测箱外湿度的外湿度检测装置；以及，内部存储有压力露点和常温露点对应关系的控制装置；所述露点检测装置、内温度传感器、外温度传感器、内湿度检测装置、外湿度检测装置以及压力传感器均与控制装置输入端连接，压力调节装置与控制装置输出入端连接。The technical scheme adopted by the utility model to solve the technical problem is as follows: an anti-condensation distribution box, comprising an inner temperature sensor for detecting the temperature inside the box; an outer temperature sensor for detecting the temperature outside the box; Pressure sensor for pressure; dew point detection device for detecting the dew point in the current environment; pressure regulating device for adjusting the air pressure in the box; internal humidity detection device for detecting the humidity in the box, and external humidity detection for detecting the humidity outside the box and a control device that stores the corresponding relationship between the pressure dew point and the normal temperature dew point; the dew point detection device, the inner temperature sensor, the outer temperature sensor, the inner humidity detection device, the outer humidity detection device and the pressure sensor are all connected to the input end of the control device Connection, the pressure regulating device is connected with the output and input end of the control device.
进一步地，配电箱设有用于与外部连通的第一气流通道和第二气流通道；所述第一气流通道内安装有一抽风机，抽风机进风口朝向箱体内部，抽风机出风口朝向箱体外部，抽风机与控制装置电连接，由控制装置控制其工作；所述第二气流通道内安装有一引风机，引风机进风口朝向箱体外部，引风机出风口朝向箱体内部，引风机与控制装置电连接，由控制装置控制其工作。Further, the distribution box is provided with a first airflow channel and a second airflow channel for communicating with the outside; an exhaust fan is installed in the first airflow channel, the intake fan of the exhaust fan faces the inside of the box, and the outlet of the exhaust fan faces the box. Outside the body, the exhaust fan is electrically connected with the control device, and its operation is controlled by the control device; an induced draft fan is installed in the second airflow channel, the air inlet of the induced draft fan faces the outside of the box body, the air outlet of the induced draft fan faces the inside of the box body, and the induced draft fan It is electrically connected with the control device, and its work is controlled by the control device.
进一步地，所述第一气流通道和第二气流通道为对角设置，第一气流通道设置在配电箱一侧上端，第二气流通道设置在相对侧的下端。Further, the first airflow channel and the second airflow channel are arranged diagonally, the first airflow channel is arranged at the upper end of one side of the distribution box, and the second airflow channel is arranged at the lower end of the opposite side.
进一步地，所述第一气流通道内设有用于阻隔第一气流通道的第一气流门，第一气流门设于抽风机前端，靠近箱体侧，，由第一电磁阀控制第一气流门与第一气流通道之间的开度。Further, the first air flow channel is provided with a first air flow door for blocking the first air flow channel, the first air flow door is arranged at the front end of the exhaust fan, close to the side of the box, and the first air flow door is controlled by a first solenoid valve. and the opening between the first airflow channel.
进一步地，所述第二气流通道内设有用于阻隔第二气流通道的第二气流门，第二气流门设于引风机后端，靠近箱体侧，由第二电磁阀控制第二气流门与第二气流通道之间的开度。Further, the second air flow channel is provided with a second air flow door for blocking the second air flow channel, the second air flow door is arranged at the rear end of the induced draft fan, close to the side of the box, and the second air flow door is controlled by the second solenoid valve. and the opening between the second airflow channel.
进一步地，所述第一电磁阀和第二电磁阀均与控制装置电连接。Further, both the first solenoid valve and the second solenoid valve are electrically connected to the control device.
进一步地，所述箱体在箱门关闭后，四周除第一气流通道和第二气流通道外呈密封结构。Further, after the box door is closed, the surrounding area of the box body is sealed except for the first air flow channel and the second air flow channel.
进一步地，所述控制装置与一用于和外部进行通信的wifi模块电连接。Further, the control device is electrically connected with a wifi module for communicating with the outside.
本实用新型的有益效果：避免了加热除湿方式提高环境温度影响电器设备的使用寿命，可能导致电器故障的问题，根据柜内外温度、湿度情况，分情况通过空气流通和压力调整方式来防止凝露生成。The beneficial effects of the utility model: avoid the problem that the heating and dehumidification method increases the ambient temperature and affects the service life of the electrical equipment, which may lead to electrical failures. According to the temperature and humidity conditions inside and outside the cabinet, air circulation and pressure adjustment methods are used to prevent condensation. generate.
附图说明Description of drawings
图1为本实用新型的一种构造示意图。Figure 1 is a schematic diagram of a structure of the utility model.
图2为一种压力露点与常压露点换算图。Figure 2 is a conversion diagram of pressure dew point and atmospheric pressure dew point.
图中：11、内温度传感器，12、外温度传感器，13、内湿度检测装置，14、外湿度检测装置，15、压力传感器，16、露点检测装置，21、抽风机，22、第一电磁阀，23、引风机，24、第二电磁阀，25、压力调节装置，31、第一气流通道，32、第二气流通道，33、第一气流门，34、第二气流门。In the figure: 11, internal temperature sensor, 12, external temperature sensor, 13, internal humidity detection device, 14, external humidity detection device, 15, pressure sensor, 16, dew point detection device, 21, exhaust fan, 22, first electromagnetic Valve, 23, induced draft fan, 24, second solenoid valve, 25, pressure regulating device, 31, first airflow channel, 32, second airflow channel, 33, first airflow door, 34, second airflow door.
具体实施方式Detailed ways
下面通过具体实施例，并结合附图，对本实用新型的技术方案作进一步的具体说明。The technical solutions of the present utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.
一种防冷凝配电箱，如图1所示，包括内温度传感器11、外温度传感器12、内湿度检测装置13、外湿度检测装置14、压力传感器15、露点检测装置16、压力调节装置25以及控制装置，内温度传感器11、外温度传感器12、内湿度检测装置13、外湿度检测装置14、压力传感器15、露点检测装置16均与控制装置输入端连接，压力调节装置25与控制装置输出入端连接。内温度传感器11、外温度传感器12分别用于检测箱内、箱外温度，内湿度检测装置13、外湿度检测装置14分别用于检测箱内、箱外湿度，压力传感器15用于检测箱内气压露点检测装置16用于检测当前环境下露点，控制装置内部存储有压力露点和常温露点对应关系。An anti-condensation distribution box, as shown in Figure 1, includes an internal temperature sensor 11, an external temperature sensor 12, an internal humidity detection device 13, an external humidity detection device 14, a pressure sensor 15, a dew point detection device 16, and a pressure adjustment device 25. And the control device, the internal temperature sensor 11, the external temperature sensor 12, the internal humidity detection device 13, the external humidity detection device 14, the pressure sensor 15, and the dew point detection device 16 are all connected to the input end of the control device, and the pressure adjustment device 25 and the control device output Inbound connection. The inner temperature sensor 11 and the outer temperature sensor 12 are respectively used to detect the temperature inside and outside the box, the inner humidity detection device 13 and the outer humidity detection device 14 are respectively used to detect the humidity inside and outside the box, and the pressure sensor 15 is used to detect the humidity inside the box. The pressure dew point detection device 16 is used to detect the dew point in the current environment, and the control device stores the corresponding relationship between the pressure dew point and the normal temperature dew point.
配电箱内部还设有第一气流通道31和第二气流通道32，第一气流通道31和第二气流通道32为对角设置，第一气流通道31设置在配电箱一侧上端，第二气流通道32设置在相对侧的下端。第一气流通道31内安装有一抽风机21，抽风机21进风口朝向箱体内部，出风口朝向箱体外部；抽风机21靠近箱体侧设有一第一气流门33，用于关闭第一气流通道31，由第一电磁阀22控制第一气流门33与第一气流通道31之间的开度。对应的，第二气流通道32内安装有一引风机23，引风机23进风口朝向箱体外部，出风口朝向箱体内部；引风机23靠近箱体侧设有一第二气流门34，由第二电磁阀24控制第二气流门34与第二气流通道32之间的开度。第一电磁阀22和第二电磁阀24均与控制装置电连接，吹风机和抽风机21也通过控制装置来控制其工作状态。The inside of the distribution box is also provided with a first airflow channel 31 and a second airflow channel 32. The first airflow channel 31 and the second airflow channel 32 are arranged diagonally, and the first airflow channel 31 is arranged at the upper end of one side of the distribution box. Two air flow passages 32 are provided at the lower ends of the opposite sides. An exhaust fan 21 is installed in the first airflow channel 31, and the air inlet of the exhaust fan 21 faces the inside of the box body, and the air outlet faces the outside of the box body; the exhaust fan 21 is provided with a first airflow door 33 on the side of the box body, which is used to close the first airflow The opening of the passage 31 is controlled by the first solenoid valve 22 between the first airflow valve 33 and the first airflow passage 31 . Correspondingly, an induced draft fan 23 is installed in the second air flow passage 32, the air inlet of the induced draft fan 23 faces the outside of the box body, and the air outlet faces the inside of the box body; The solenoid valve 24 controls the opening degree between the second air flow valve 34 and the second air flow passage 32 . Both the first solenoid valve 22 and the second solenoid valve 24 are electrically connected to the control device, and the blower and the exhaust fan 21 are also controlled by the control device to control their working states.
控制装置根据箱体内外温差、湿度，控制第一电磁阀22和第二电磁阀24工作，调节第一气流门33和第二气流门34的开度进而控制抽风机21的进风量和抽风机21的出气量。未饱和空气在保持水蒸气分压力不变(即保持绝对含水量不变)情况下降低温度，使之达到饱和状态时的温度叫做露点。温度降至露点时，湿空气中便有凝结水滴析出。湿空气的露点不仅与温度有关，而且与湿空气中水分含量的多少有关，含水量大的露点高，含水量少的露点低。湿空气被压缩后，水蒸气密度增加，温度也不过升，压缩空气冷却时，相对湿度便增加，当温度继续下降到相对湿度大100％时，便有水滴从压缩空气中析出，这时的湿度就是压缩空气的压力露点。压力露点与常压露点之间的对应关系与压缩比有关，常压露点是指在大气压力下水份的凝结温度，而压力下露点是指该压力下的水份凝结温度，一般用图来表示，如图2所示，在压力露点相同的情况下，压缩比越大，所对应的常压露点越低，如压力0.7Mpa的压缩空气压力露点为-2时，相当于常压露点为-30℃；当压力提高到1.0Mpa时，同样的压力露点为-2时，对应的常压露点降至-33℃，因此通过增大箱内空气压力，会使得露点降低，越不容易凝结成露珠。The control device controls the operation of the first solenoid valve 22 and the second solenoid valve 24 according to the temperature difference and humidity inside and outside the box, adjusts the opening of the first air flow door 33 and the second air flow door 34, and then controls the air intake of the exhaust fan 21 and the exhaust fan. 21 air output. The dew point is the temperature at which the unsaturated air reduces the temperature while keeping the water vapor partial pressure constant (that is, keeping the absolute water content constant). When the temperature drops to the dew point, condensed water droplets are deposited in the moist air. The dew point of humid air is not only related to the temperature, but also to the amount of moisture in the humid air. After the humid air is compressed, the water vapor density increases, and the temperature does not rise. When the compressed air cools, the relative humidity increases. When the temperature continues to drop to 100% relative humidity, water droplets are precipitated from the compressed air. Humidity is the pressure dew point of the compressed air. The correspondence between pressure dew point and atmospheric pressure dew point is related to the compression ratio. Atmospheric pressure dew point refers to the condensation temperature of water under atmospheric pressure, while pressure dew point refers to the condensation temperature of water under this pressure. It means that, as shown in Figure 2, when the pressure dew point is the same, the larger the compression ratio, the lower the corresponding normal pressure dew point. -30℃; when the pressure is increased to 1.0Mpa, when the same pressure dew point is -2, the corresponding normal pressure dew point will drop to -33℃, so by increasing the air pressure in the box, the dew point will be reduced, and the more difficult it is to condense into dewdrops.
本实用新型基于露点与压力的关系设置了压力传感器15、露点检测装置16和压力调节装置25，露点检测装置16将检测到的当前环境下的实时露点值T传送至控制装置，控制装置再根据湿度信号、压力信号采取相应的控制方式。The present invention is provided with a pressure sensor 15, a dew point detection device 16 and a pressure adjustment device 25 based on the relationship between dew point and pressure. The dew point detection device 16 transmits the detected real-time dew point value T under the current environment to the control device, and the control device then according to The humidity signal and pressure signal take corresponding control methods.
当检测到的实时露点值T接近当前压力下的标准露点值T′时，也即(T-T′)∈(ΔT1，ΔT2)，范围内时分两种情况进行调整。When the detected real-time dew point value T is close to the standard dew point value T' under the current pressure, that is, (T-T')∈(ΔT1, ΔT2), adjustment is performed in two cases within the range.
情况一：内湿外干，内热外冷，即检测到的箱外湿度小于箱内湿度，同时箱内温度高于箱外温度，此时控制装置分别通过第一电磁阀22和第二电磁阀24控制第一气流门33和第二气流门34的开度，抽风机21和引风机23同时开始工作，抽风机21加速将箱内湿热空气通过第一气流通道31排出箱外，引风机23加速将箱外凉爽干燥的空气第二气流通道32引入箱内，由于第一气流通道31和第二气流通道32是对角设置，在箱体内形成空气对流，凉爽干燥的空气进入箱体底部后将湿热空气挤压至箱底上部，通过第一气流通道31排出，作为空气交换，此时实时露点值T随之降低。若取消抽风机21和引风机23也能实现同样的目的，抽风机21和引风机23的设置在于加速空气流动，使得实时露点值T快速降低。Case 1: The inside is wet and the outside is dry, the inside is hot and the outside is cold, that is, the detected humidity outside the box is lower than the humidity inside the box, and the temperature inside the box is higher than the temperature outside the box. At this time, the control device passes the first solenoid valve 22 and the second solenoid valve respectively. 24 controls the opening of the first air flow door 33 and the second air flow door 34, the exhaust fan 21 and the induced draft fan 23 start to work at the same time, and the exhaust fan 21 accelerates the humid and hot air in the box to be discharged out of the box through the first air flow channel 31, and the induced draft fan 23 The second airflow channel 32 of cool and dry air outside the box is accelerated into the box. Since the first airflow channel 31 and the second airflow channel 32 are arranged diagonally, air convection is formed in the box, and the cool and dry air enters the bottom of the box. The moist and hot air is squeezed to the upper part of the bottom of the box and discharged through the first airflow channel 31 as air exchange, and the real-time dew point value T decreases accordingly. The same purpose can be achieved if the exhaust fan 21 and the induced draft fan 23 are eliminated. The setting of the exhaust fan 21 and the induced draft fan 23 is to accelerate the air flow, so that the real-time dew point value T decreases rapidly.
情况二：内干外湿，内热外冷，即检测到的箱外湿度大于箱内湿度，同时箱内温度高于箱外温度，此时控制装置分别通过第一电磁阀22和第二电磁阀24控制第一气流门33和第二气流门34关闭，抽风机21和引风机23不工作，整个箱体呈密封状态，压力调节装置25开始工作，给箱体内加压，压力增大时，对应图2，露点降低，箱内的湿空气不易凝结成露珠。当(T-T′)大于设定阈值时，压力调节装置25停止工作。Case 2: The inside is dry and the outside is wet, and the inside is hot and the outside is cold, that is, the detected humidity outside the box is higher than the humidity inside the box, and the temperature inside the box is higher than the temperature outside the box. At this time, the control device passes the first solenoid valve 22 and the second solenoid valve respectively. 24 Control the first air flow door 33 and the second air flow door 34 to close, the exhaust fan 21 and the induced draft fan 23 do not work, the entire box body is in a sealed state, the pressure regulating device 25 starts to work, pressurizes the box body, and when the pressure increases, Corresponding to Figure 2, the dew point is lowered, and the humid air in the box is not easy to condense into dewdrops. When (T-T') is greater than the set threshold, the pressure regulating device 25 stops working.
本实用新型还将控制装置与一用于和外部进行通信的wifi模块电连接，这样便于实现配电箱的远程控制，实现远程调节，当通过以上方式均不能有效阻止凝露形成时，则通过wifi模块发出报警信号。通过wifi模块将该配电箱的各环境参数传至远程控制端记录，有助于对当前配电箱所处环境与冷凝现象的研究。The utility model also electrically connects the control device with a wifi module for communicating with the outside, so that it is convenient to realize the remote control of the distribution box and realize the remote adjustment. The wifi module sends out an alarm signal. Through the wifi module, the environmental parameters of the distribution box are transmitted to the remote control terminal for recording, which is helpful for the study of the current environment and condensation phenomenon of the distribution box.
以上所述，仅是本实用新型的较佳实施例而已，并非对本实用新型作任何形式上的限制。虽然本实用新型已以较佳实施例揭露如上，然而并非用以限定本实用新型。任何熟悉本领域的技术人员，在不脱离本实用新型技术方案范围情况下，都可利用上述揭示的方法和技术内容对本实用新型技术方案做出许多可能的变动和修饰，或修改为等同变化的等效实施例。因此，凡是未脱离本实用新型技术方案的内容，依据本实用新型的技术实质对以上实施例所做的任何简单修改、等同变化及修饰，均仍属于本实用新型技术方案保护的范围内。The above descriptions are only preferred embodiments of the present invention, and do not limit the present invention in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art, without departing from the scope of the technical solution of the present invention, can utilize the methods and technical contents disclosed above to make many possible changes and modifications to the technical solution of the present invention, or be modified to equivalent changes. Equivalent Example. Therefore, without departing from the content of the technical solution of the present invention, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109449767A (en) * | 2018-09-18 | 2019-03-08 | 国网浙江省电力有限公司紧水滩水力发电厂 | A kind of condensation-proof distribution box and its control method |
| CN110530930A (en) * | 2019-09-12 | 2019-12-03 | 凯迈（洛阳）气源有限公司 | A kind of quick dew point measurement device |
| CN112467572A (en) * | 2020-09-30 | 2021-03-09 | 国网浙江省电力有限公司绍兴供电公司 | Moisture-proof and condensation-proof switch cabinet and method for regulating and controlling environment in cabinet |
| CN112702886A (en) * | 2019-10-22 | 2021-04-23 | 华为技术有限公司 | Liquid cooling heat dissipation system, heat dissipation control method and control chip |
| CN116858577A (en) * | 2023-06-29 | 2023-10-10 | 小米汽车科技有限公司 | Low-temperature test method, system and device for air supply unit |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109449767A (en) * | 2018-09-18 | 2019-03-08 | 国网浙江省电力有限公司紧水滩水力发电厂 | A kind of condensation-proof distribution box and its control method |
| CN110530930A (en) * | 2019-09-12 | 2019-12-03 | 凯迈（洛阳）气源有限公司 | A kind of quick dew point measurement device |
| CN112702886A (en) * | 2019-10-22 | 2021-04-23 | 华为技术有限公司 | Liquid cooling heat dissipation system, heat dissipation control method and control chip |
| CN112467572A (en) * | 2020-09-30 | 2021-03-09 | 国网浙江省电力有限公司绍兴供电公司 | Moisture-proof and condensation-proof switch cabinet and method for regulating and controlling environment in cabinet |
| CN116858577A (en) * | 2023-06-29 | 2023-10-10 | 小米汽车科技有限公司 | Low-temperature test method, system and device for air supply unit |
| CN116858577B (en) * | 2023-06-29 | 2024-05-31 | 小米汽车科技有限公司 | Low-temperature test method, system and device for air supply unit |
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