High-pressure chamber dehumidification system

Abstract

The invention relates to a dehumidification system for a high-pressure chamber. The dehumidification system comprises a dehumidifier, an air outlet fan set and an air outlet duct which communicate with one another in sequence. The air inlet duct and the air inlet fan group are communicated in sequence; a first air outlet of the air inlet fan group is communicated with a first air inlet of the dehumidifier; the air outlet duct is communicated with an air inlet formed in the top of at least one power distribution cabinet, an electric well at the bottom of the power distribution cabinet forms an air inlet duct, and the air inlet duct is communicated with an air outlet formed in the bottom of at least one power distribution cabinet; the air outlet duct is communicated with the air inlet duct through a power distribution cabinet; according to the power distribution cabinet, only the power distribution cabinet and the electric well located at the bottom of the power distribution cabinet are dehumidified through the air inlet duct and the air outlet duct, the dehumidification efficiency is greatly improved, and the air inlet duct is formed through the electric well, so that the cable in the electric well can be effectively dehumidified; the power distribution cabinet adopts an upper-inlet and lower-outlet air outlet mode, so that the cooling effect of the power distribution cabinet is better.

Description

Technical Field

[0001] The present invention relates to the technical field of dehumidification in high-voltage rooms, and particularly relates to a dehumidification system for high-voltage rooms. Background Art

[0002] A high-voltage room is a power facility in a power supply system that is responsible for transmitting electricity to a substation or directly supplying electricity to users. It usually uses equipment such as high-voltage cables and overhead lines for power transmission. Inside the high-voltage room, high-voltage switchgear is generally installed, and equipment such as isolating switches, handcart circuit breakers, vacuum circuit breakers, sulfur hexafluoride circuit breakers, high-voltage current transformers, and voltage transformers are installed inside the cabinets for distributing, controlling, monitoring, and metering electric energy.

[0003] In order to ensure the safe and stable operation of the high-voltage room, it is necessary to dehumidify the indoor environment to prevent equipment from getting damp, being damaged, or malfunctioning. Currently, the existing dehumidification method is to use a dehumidifier to dehumidify the entire high-voltage room. However, the existing high-voltage room has a certain degree of airtightness, and directly using a dehumidifier to dehumidify the switchgear in the high-voltage room has a poor effect, and it is also impossible to dehumidify the cables in the cable shaft. The dehumidification effect is poor and the dehumidification efficiency is low. Summary of the Invention

[0004] In view of this, the present invention aims to provide a dehumidification system for high-voltage rooms with high dehumidification efficiency to solve the problems mentioned in the existing technology.

[0005] To achieve the above object, the technical solution of the present invention is realized as follows:

[0006] The first aspect of the present invention provides a dehumidification system for high-voltage rooms, including:

[0007] A dehumidifier, an air outlet fan group, and an air outlet duct that are connected in sequence; it also includes an air inlet duct and an air inlet fan group that are connected in sequence; the first air outlet of the air inlet fan group is connected to the first air inlet of the dehumidifier;

[0008] The air outlet duct is connected to the air inlet provided at the top of the switchgear, the cable shaft at the bottom of the switchgear forms the air inlet duct, and the air inlet duct is connected to the air outlet provided at the bottom of the switchgear; the switchgear is at least one; the air outlet duct is connected to the air inlet duct through the switchgear;

[0009] The system also includes a main control unit, which is respectively connected to the air outlet fan group, the air inlet fan group, and the dehumidifier; the main control unit responds to the user's opening operation and drives the air outlet fan group, the air inlet fan group, and the dehumidifier to start; the air outlet fan group blows air into the air outlet duct and passes through the switchgear and then is extracted by the air inlet fan group through the air inlet duct, and the air extracted by the air inlet fan group flows into the dehumidifier for dehumidification and then flows to the air outlet fan group.

[0010] Further, the dehumidifier is a semiconductor dehumidifier.

[0011] Further, the system further includes a first air inlet valve, a second air inlet valve, and an auxiliary cooler. The air inlet of the first air inlet valve is communicated with the first air outlet of the air inlet fan group. The air outlet of the first air inlet valve is communicated with the first air inlet of the semiconductor dehumidifier. The air inlet of the second air inlet valve is communicated with the second air outlet of the air inlet fan group. The air inlet of the auxiliary cooler is connected to the air outlet of the second air inlet valve. The air outlet of the auxiliary cooler is communicated with the second air inlet of the semiconductor dehumidifier;

[0012] An ambient temperature and humidity sensor is arranged inside the semiconductor dehumidifier;

[0013] The main control unit is respectively connected to the ambient temperature and humidity sensor, the auxiliary cooler, the first air inlet valve, and the second air inlet valve.

[0014] Further, the first air inlet valve and the second air inlet valve are respectively on-off valves; when the temperature of the ambient temperature and humidity sensor is greater than a first preset threshold, the main control unit opens the second air inlet valve and closes the first air inlet valve. After the first air inlet valve is closed in place and the second air inlet valve is opened in place, the auxiliary cooler is started. The air extracted by the air inlet fan group flows into the auxiliary cooler through the second air inlet valve for refrigeration, and then flows into the semiconductor dehumidifier after refrigeration;

[0015] When the temperature of the ambient temperature sensor is less than a second preset threshold, the main control unit turns off the auxiliary cooler, and after a preset delay time, closes the second air inlet valve and opens the first air inlet valve; the air extracted by the air inlet fan group flows into the semiconductor dehumidifier through the first air inlet valve.

[0016] Further, a one-way air valve that only allows the air outlet of the auxiliary cooler to flow towards the semiconductor dehumidifier is arranged at the second air inlet of the semiconductor dehumidifier.

[0017] Further, at least one air outlet temperature and humidity sensor is arranged on the air outlet duct, and at least one air inlet temperature and humidity sensor is arranged on the air inlet duct; the main control unit is respectively connected to the air inlet temperature and humidity sensor and the air outlet temperature and humidity sensor. When the humidity of the air inlet temperature and humidity sensor is greater than a third preset threshold or the humidity of the air outlet temperature and humidity sensor is greater than a fourth preset threshold, the main control unit opens the air outlet valve and the first air inlet valve, and starts the dehumidifier after the air outlet valve and the first air inlet valve are opened;

[0018] When the humidity of the air inlet temperature and humidity sensor is less than the third preset threshold and the humidity of the air outlet temperature and humidity sensor is less than the fourth preset threshold, the main control unit turns off the dehumidifier.

[0019] Further, at least one inlet relay fan group is provided in the inlet air duct, and at least one outlet relay fan group is provided in the outlet air duct. A temperature and humidity sensor for the power distribution cabinet is provided in the power distribution cabinet. When the number of power distribution cabinets is two or more, the main control unit calculates the difference between the maximum humidity and the minimum humidity of the temperature and humidity sensors of each power distribution cabinet, and when the difference is greater than the fifth preset threshold, the inlet relay fan group and the outlet relay fan group are turned on.

[0020] Further, dust removal nets are respectively provided between the outlet air duct and the outlet fan group, and between the inlet air duct and the inlet fan group.

[0021] Further, the system further includes an outlet air valve. The inlet of the outlet air valve is communicated with the outlet of the dehumidifier, and the outlet of the outlet air valve is communicated with the inlet of the outlet fan group. The main control unit is connected to the outlet air valve, and the main control unit closes the outlet air valve in response to a user's operation instruction or a linkage instruction of the fire protection system.

[0022] Further, the system further includes a make-up air valve and at least one air volume sensor. The air volume sensor is arranged in the inlet air duct and / or the outlet air duct. The outlet of the make-up air valve is communicated with the third inlet of the dehumidifier, and the inlet is communicated with the outside and / or the fresh air duct. The main control unit is connected to the make-up air valve and the air volume sensor, and the main control unit turns on the make-up air valve when the air volume per unit time of the air volume sensor is less than the sixth preset threshold.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] In the present invention, compared with dehumidifying the entire high-configuration room, the present disclosure only dehumidifies the power distribution cabinet and the cable shaft at the bottom of the power distribution cabinet through the inlet air duct and the outlet air duct, greatly improving the dehumidification efficiency. In addition, in the present application, the cable shaft forms the inlet air duct, so that the cables in the cable shaft can be effectively dehumidified; and the present disclosure adopts an air outlet method of upper-in and lower-out, so that the cooling effect of the power distribution cabinet is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0026] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 is a schematic diagram of the air flow direction when the auxiliary cooler is turned on provided by the embodiment of the present invention;

[0028] Figure 3Schematic diagram of the air flow direction when the auxiliary cooler is turned off provided by an embodiment of the present invention;

[0029] Figure 4 Schematic diagram of the connection structure of the main control unit of the present invention. Detailed implementation manners

[0030] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other.

[0031] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "back", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0032] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installed", "connected", "connected together", "connecting parts" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in combination with specific situations.

[0033] Next, reference will be made to the attached Figures 1 to 4 and the embodiments will be used to describe the present invention in detail.

[0034] Embodiment 1

[0035] Generally speaking, as Figure 1 shown, this embodiment provides a dehumidification system for a high-voltage chamber, including:

[0036] A dehumidifier, an air outlet fan group, and an air outlet duct that are connected in sequence; it also includes an air inlet duct and an air inlet fan group that are connected in sequence; the first air outlet of the air inlet fan group is connected to the first air inlet of the dehumidifier;

[0037] The air outlet duct is connected to the air inlet provided at the top of the power distribution cabinet, the electrical well at the bottom of the power distribution cabinet forms the air inlet duct, and the air inlet duct is connected to the air outlet provided at the bottom of the power distribution cabinet; there is at least one power distribution cabinet, and the air outlet duct is connected to the air inlet duct through the power distribution cabinet;

[0038] The dehumidification system further includes a main control unit, which is respectively connected to the air outlet fan group, the air inlet fan group and the dehumidifier; the main control unit responds to the user's opening operation and drives the air outlet fan group, the air inlet fan group and the dehumidifier to start; the air outlet fan group blows air into the air outlet duct, and after passing through the power distribution cabinet, the air is extracted by the air inlet fan group through the air inlet duct, and the air extracted from the air inlet fan group flows into the dehumidifier for dehumidification and then flows to the air outlet fan group.

[0039] Compared with dehumidifying the entire high - configuration room, the present disclosure only dehumidifies the power distribution cabinet and the cable shaft at the bottom of the power distribution cabinet through the air inlet duct and the air outlet duct, greatly improving the dehumidification efficiency. In addition, in the present application, the air inlet duct is formed by the cable shaft, so the cables in the cable shaft can be effectively dehumidified; and the present disclosure adopts the air outlet method of blowing air from top to bottom, making the cooling effect of the power distribution cabinet better.

[0040] In a possible implementation manner, the dehumidifier is a semiconductor dehumidifier.

[0041] In the present disclosure, the following several types of dehumidifiers are selected:

[0042] Cooling dehumidifier: This kind of dehumidifier uses a coolant to cool the air, causing the water vapor in the air to condense into water, thereby achieving the purpose of dehumidification.

[0043] Adsorption dehumidifier: This kind of dehumidifier uses adsorbents (such as silica gel, activated carbon, etc.) to adsorb the moisture in the air, thereby achieving the dehumidification effect.

[0044] Membrane separation dehumidifier: This kind of dehumidifier uses polymer membrane materials to separate the water vapor in the air, thereby realizing dehumidification. This kind of dehumidifier has the advantages of low energy consumption and no noise, but the cost is relatively high.

[0045] Semiconductor dehumidifier: This kind of dehumidifier uses the thermoelectric effect of semiconductor materials to achieve dehumidification. When an electric current passes through the semiconductor material, an endothermic or exothermic effect will occur, thereby forming a cold and hot area on the surface of the semiconductor material, causing the water vapor in the air to condense into water in the cold area. This kind of dehumidifier has the advantages of small volume, light weight and low noise, but the dehumidification ability is relatively weak.

[0046] The present disclosure preferably uses a semiconductor dehumidifier. Compared with other dehumidifiers, the semiconductor dehumidifier has the following advantages:

[0047] Low production cost: Its core components adopt a semiconductor refrigeration system, making the cost relatively low.

[0048] Low usage cost: The power consumption of the semiconductor dehumidifier is small, only 1 / 5 - 1 / 10 of that of a compressor dehumidifier, so the usage cost is relatively low.

[0049] Simple structure, low failure rate, and long service life: The semiconductor dehumidifier has a simple structure, is not prone to failure, and has a long service life.

[0050] Small size and light weight: The semiconductor dehumidifier is small in size and light in weight, making it convenient to use in small spaces, easy to move, and suitable for use in different places.

[0051] No mechanical vibration and low noise: The semiconductor dehumidifier does not generate mechanical vibration during operation and has low noise, making it suitable for use in places such as bedrooms that require a quiet environment.

[0052] High energy efficiency: The semiconductor dehumidifier uses electric heating sheets to provide heating energy and does not require high-power equipment such as compressors, so it has high energy efficiency.

[0053] In addition, the copper bars and cables in the distribution room generate a lot of heat. In addition to dehumidification, the semiconductor dehumidifier also has a certain cooling effect.

[0054] Embodiment 2

[0055] In Embodiment 1, the dehumidifier uses a semiconductor dehumidifier. Generally, the semiconductor dehumidifier has the best dehumidification effect at temperatures below 30 degrees Celsius. Excessive temperature will affect the dehumidification efficiency of the semiconductor dehumidifier. During the peak electricity consumption period, the power distribution cabinet in the high-voltage room will generate a large amount of heat, resulting in the ambient temperature during the actual operation of the dehumidifier being greater than 30 degrees Celsius. At the same time, the excessive temperature will also affect the operation of power equipment such as the power distribution cabinet in the high-voltage distribution room. Based on this, the present disclosure proposes the following:

[0056] The dehumidification system further includes a first air inlet valve, a second air inlet valve, and an auxiliary cooler. The air inlet of the first air inlet valve is connected to the first air outlet of the air inlet fan group. The air outlet of the first air inlet valve is connected to the first air inlet of the semiconductor dehumidifier. The air inlet of the second air inlet valve is connected to the second air outlet of the air inlet fan group. The air inlet of the auxiliary cooler is connected to the air outlet of the second air inlet valve. The air outlet of the auxiliary cooler is connected to the second air inlet of the semiconductor dehumidifier;

[0057] An ambient temperature and humidity sensor is provided inside the semiconductor dehumidifier;

[0058] The main control unit is respectively connected to the ambient temperature and humidity sensor, the auxiliary cooler, the first air inlet valve, and the second air inlet valve.

[0059] As Figure 2 shown, in a possible implementation manner, the first air inlet valve and the second air inlet valve are respectively on-off valves; when the temperature detected by the ambient temperature and humidity sensor is greater than the first preset threshold, the main control unit opens the second air inlet valve and closes the first air inlet valve. After the first air inlet valve is fully closed and the second air inlet valve is fully opened, the auxiliary cooler is turned on. The air extracted by the air inlet fan group flows into the auxiliary cooler through the second air inlet valve for cooling and then flows into the semiconductor dehumidifier;

[0060] As Figure 3 shown, when the temperature of the ambient temperature sensor is less than the second preset threshold, the main control unit turns off the auxiliary cooler, and after a preset delay time, turns off the second air inlet valve and opens the first air inlet valve; the air extracted by the air inlet fan group flows into the semiconductor dehumidifier through the first air inlet valve.

[0061] Since the present disclosure is provided with an auxiliary cooler to further reduce the temperature of the air brought by the air inlet fan group, the auxiliary cooler can not only cool the power distribution cabinet, but also keep the semiconductor dehumidifier in an efficient dehumidification operation state all the time, and the semiconductor dehumidifier can further improve the grade of the air produced by the auxiliary cooler, further enhancing the cooling effect on the power distribution cabinet.

[0062] In a possible implementation manner, a one-way air valve that only allows the air outlet of the auxiliary cooler to flow to the semiconductor dehumidifier is provided at the second air inlet of the semiconductor dehumidifier. The one-way air valve prevents the air entering from the first air inlet of the dehumidifier from entering the auxiliary cooler.

[0063] In a possible implementation manner, dust removal nets are respectively provided between the air outlet duct and the air outlet fan group, and between the air inlet duct and the air inlet fan group. The dust removal nets mainly prevent the dust in the power distribution cabinet, the air inlet duct and the air outlet duct from being brought into the dehumidifier, affecting the contact between the air and the dehumidifying part of the dehumidifier, and further affecting the dehumidification effect of the dehumidifier.

[0064] In a possible implementation manner, the dehumidification system further includes a make-up air valve and at least one air volume sensor. The air volume sensor is arranged in the air inlet duct and / or the air outlet duct. The air outlet of the make-up air valve is communicated with the third air inlet of the dehumidifier, and the air inlet is communicated with the outside and / or the fresh air duct.

[0065] The main control unit is connected to the make-up air valve and the air volume sensor. The main control unit opens the make-up air valve when the air volume per unit time of the air volume sensor is less than the sixth preset threshold. Through the air volume sensor, it can be known whether the air volume of the present disclosure is sufficient, and when the air volume is insufficient, it is supplemented through the make-up air valve.

[0066] Embodiment 3

[0067] In order to effectively monitor the dehumidification effect in the present disclosure and to avoid excessive energy consumption caused by the continuous operation of the present disclosure, the following design is made in the present disclosure:

[0068] At least one air outlet temperature and humidity sensor is provided on the air outlet duct, and at least one air inlet temperature and humidity sensor is provided on the air inlet duct; the main control unit is respectively connected to the air inlet temperature and humidity sensor and the air outlet temperature and humidity sensor. When the humidity of the air inlet temperature and humidity sensor is greater than the third preset threshold or the humidity of the air outlet temperature and humidity sensor is greater than the fourth preset threshold, the main control unit opens the air outlet valve and the first air inlet valve, and turns on the dehumidifier after the air outlet valve and the first air inlet valve are opened;

[0069] When the humidity of the air inlet temperature and humidity sensor is less than the third preset threshold and the humidity of the air outlet temperature and humidity sensor is less than the fourth preset threshold, the main control unit turns off the dehumidifier.

[0070] When the humidity in the air outlet duct and the air inlet duct meets the requirements, the dehumidifier is turned off to reduce energy consumption.

[0071] Embodiment 4

[0072] This embodiment is for large-scale power distribution rooms. In large-scale power distribution rooms, the air outlet duct and the air inlet duct are generally long. The air blown out by the air outlet fan group may be difficult to reach the power distribution cabinets far from the dehumidifier, resulting in poor dehumidification effect of the power distribution cabinets. Based on this, the present disclosure proposes the following solution:

[0073] At least one air inlet relay fan group is further provided in the air inlet duct, and at least one air outlet relay fan group is further provided in the air outlet duct. A power distribution cabinet temperature and humidity sensor is provided in the power distribution cabinet. When the number of power distribution cabinets is two or more, the main control unit calculates the difference between the maximum humidity and the minimum humidity of each power distribution cabinet temperature and humidity sensor. When the difference is greater than the fifth preset threshold, the air inlet relay fan group and the air outlet relay fan group are turned on. When the humidity difference between individual power distribution cabinets is too large, it means that the dehumidification effect of the power distribution cabinets far from the dehumidifier is poor. At this time, the air inlet relay fan group and the air outlet relay fan group need to be turned on to increase the dehumidification effect of the present disclosure on the power distribution cabinets far from the dehumidifier.

[0074] The present disclosure enhances the dehumidification effect of the present disclosure through the air inlet relay fan group and the air outlet relay fan group.

[0075] Embodiment 5

[0076] This embodiment is mainly for effectively blocking a fire when a fire occurs. Therefore, the present disclosure proposes the following solution:

[0077] The dehumidification system further includes an air outlet valve. The air inlet of the air outlet valve is communicated with the air outlet of the dehumidifier, and the air outlet of the air outlet valve is communicated with the air inlet of the air outlet fan group. The main control unit is connected to the air outlet valve. The main control unit closes the air outlet valve in response to the user's operation instruction or in response to the linkage instruction of the fire protection system.

[0078] Under normal operating conditions, the air outlet valve is always in the open state. In case of a fire, the staff can manually operate to close the air outlet valve through the main control unit to block the fire, or the main control unit responds to the linkage operation instruction sent by the on-site fire protection system to close the air outlet valve, and after the fire disappears, the air outlet valve is opened by the staff issuing a reset instruction. When the air outlet valve is in the open state, the dehumidifier, the air outlet fan group and the air inlet fan group in the present disclosure cannot be started.

[0079] To ensure the stable operation of the present disclosure, in Embodiments 1 to 5 of the present disclosure, Figure 4 the main control unit shown is preferably a Siemens series PLC, such as Siemens SMART200 and the corresponding analog quantity acquisition module.

[0080] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-voltage chamber dehumidification system, characterized in that, Comprising: A dehumidifier, an air outlet fan group, and an air outlet duct that are connected in sequence; further comprising an air inlet duct and an air inlet fan group that are connected in sequence; the first air outlet of the air inlet fan group is connected to the first air inlet of the dehumidifier; The air outlet duct is connected to the air inlet provided at the top of the power distribution cabinet, the cable shaft at the bottom of the power distribution cabinet forms the air inlet duct, and the air inlet duct is connected to the air outlet provided at the bottom of the power distribution cabinet; there is at least one power distribution cabinet, and the air outlet duct is connected to the air inlet duct through the power distribution cabinet; The system further comprises a main control unit, which is respectively connected to the air outlet fan group, the air inlet fan group, and the dehumidifier; the main control unit drives the air outlet fan group, the air inlet fan group, and the dehumidifier to start in response to the user's opening operation; the air outlet fan group blows air into the air outlet duct and after passing through the power distribution cabinet, the air is extracted by the air inlet fan group through the air inlet duct, and the air extracted by the air inlet fan group flows into the dehumidifier for dehumidification and then flows to the air outlet fan group.

2. The dehumidification system for a high-voltage chamber according to claim 1, characterized in that: The dehumidifier is a semiconductor dehumidifier.

3. The dehumidification system for a high-voltage chamber according to claim 2, characterized in that: The system further comprises a first air inlet valve, a second air inlet valve, and an auxiliary cooler. The air inlet of the first air inlet valve is connected to the first air outlet of the air inlet fan group, the air outlet of the first air inlet valve is connected to the first air inlet of the semiconductor dehumidifier, the air inlet of the second air inlet valve is connected to the second air outlet of the air inlet fan group, the air inlet of the auxiliary cooler is connected to the air outlet of the second air inlet valve, and the air outlet of the auxiliary cooler is connected to the second air inlet of the semiconductor dehumidifier; an ambient temperature and humidity sensor is provided inside the semiconductor dehumidifier; The main control unit is respectively connected to the ambient temperature and humidity sensor, the auxiliary cooler, the first air inlet valve, and the second air inlet valve.

4. A high-voltage chamber dehumidification system according to claim 3, characterized in that: The first air inlet valve and the second air inlet valve are respectively on-off valves; when the temperature detected by the ambient temperature and humidity sensor is greater than the first preset threshold, the main control unit opens the second air inlet valve and closes the first air inlet valve. After the first air inlet valve is closed in place and the second air inlet valve is opened in place, the auxiliary cooler is started. The air extracted by the air inlet fan group flows into the auxiliary cooler through the second air inlet valve for refrigeration and then flows into the semiconductor dehumidifier after refrigeration; When the temperature detected by the ambient temperature sensor is less than the second preset threshold, the main control unit turns off the auxiliary cooler, and after a preset delay time, closes the second air inlet valve and opens the first air inlet valve; the air extracted by the air inlet fan group flows into the semiconductor dehumidifier through the first air inlet valve.

5. A dehumidification system for a high-voltage chamber according to claim 3, characterized in that: A one-way air valve that only allows the air outlet of the auxiliary cooler to flow into the semiconductor dehumidifier is provided at the second air inlet of the semiconductor dehumidifier.

6. The dehumidification system for a high-voltage chamber according to claim 1, wherein: At least one air outlet temperature and humidity sensor is provided on the air outlet duct, and at least one air inlet temperature and humidity sensor is provided on the air inlet duct; the main control unit is respectively connected to the air inlet temperature and humidity sensor and the air outlet temperature and humidity sensor. When the humidity detected by the air inlet temperature and humidity sensor is greater than the third preset threshold or the humidity detected by the air outlet temperature and humidity sensor is greater than the fourth preset threshold, the main control unit opens the first air inlet valve and turns on the semiconductor dehumidifier after the first air inlet valve is opened; When the humidity detected by the air inlet temperature and humidity sensor is less than the third preset threshold and the humidity detected by the air outlet temperature and humidity sensor is less than the fourth preset threshold, the main control unit turns off the dehumidifier.

7. A dehumidification system for a high-voltage chamber according to claim 1, characterized in that: At least one inlet air relay fan group is further provided in the inlet air duct, at least one outlet air relay fan group is further provided in the outlet air duct, a temperature and humidity sensor of the power distribution cabinet is provided in the power distribution cabinet, and when the number of power distribution cabinets is two or more, the main control unit calculates the difference between the maximum humidity and the minimum humidity of the temperature and humidity sensors of each power distribution cabinet, and when the difference is greater than the fifth preset threshold, the inlet air relay fan group and the outlet air relay fan group are turned on.

8. A dehumidification system for a high-voltage chamber according to claim 1, characterized in that: Dust removal nets are respectively provided between the outlet air duct and the outlet air fan group and between the inlet air duct and the inlet air fan group.

9. A dehumidification system for a high-voltage chamber according to claim 1, characterized in that: The system further includes an outlet air valve. The inlet of the outlet air valve is communicated with the outlet of the semiconductor dehumidifier, and the outlet of the outlet air valve is communicated with the inlet of the outlet air fan group. The main control unit is connected to the outlet air valve, and the main control unit closes the outlet air valve in response to the operation instruction of the user or the linkage instruction of the fire protection system.

10. The dehumidification system for a high-voltage chamber according to claim 1, characterized in that: The system further includes a make-up air valve and at least one air volume sensor. The air volume sensor is arranged in the inlet air duct and / or the outlet air duct. The outlet of the make-up air valve is communicated with the third inlet of the dehumidifier, and the inlet is communicated with the outdoor and / or the fresh air duct. The main control unit is connected to the make-up air valve and the air volume sensor, and the main control unit turns on the make-up air valve when the air volume per unit time of the air volume sensor is less than the sixth preset threshold.

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