Power distribution room frequency converter cooling system
By using a closed-loop air-cooled unit system, the impact of high temperatures in the power distribution room and the external environment on the frequency converter is resolved, achieving a clean and energy-saving cooling effect and ensuring the safe and reliable operation of the frequency converter.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-17
- Publication Date
- 2026-04-03
AI Technical Summary
In existing technologies, the high-temperature environment in the power distribution room affects the normal operation of the frequency converter, and the indoor air conditioning has insufficient cooling capacity, resulting in high energy consumption. Furthermore, the high humidity, high dust, and high corrosion environment outside affects equipment safety.
The closed-loop air-cooled unit system connects the indoor unit of the air-cooled unit to the top of the inverter cabinet to form a closed-loop cooling system. The outdoor unit of the air-cooled unit removes heat and exhausts hot air through an emergency duct in case of emergency, avoiding the influence of the external environment.
It achieves a clean operating environment for the frequency converter, with the temperature controlled at 20~30℃, preventing external moisture and dust from entering, saving 30% energy, with modules serving as backups for each other, ensuring equipment safety and reliability, and reducing operating costs.
Smart Images
Figure CN224083924U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of a cooling system, in particular to the technical field of a cooling system for a frequency converter, and specifically to a cooling system for a frequency converter in a power distribution room. Background Art
[0002] In the production devices supporting a coke oven, important devices such as a gas blower, a coke dry quenching hoist, and a coke dry quenching circulating fan have large motor powers, which are 1000KW, 3000KW, and 3300KW respectively. The energy conservation of the devices has an important impact. Currently, frequency converters are configured for all of them. Due to the large heat dissipation of the frequency converters, the temperature in the power distribution room is high, and the high-temperature environment affects the normal operation of the devices.
[0003] In the prior art, usually, the design institute adopts the design of installing an air conditioner indoors. After practical tests, the cooling capacity of the indoor air conditioner cannot meet the requirements. Especially during the high-temperature period in summer, the refrigeration load of the air conditioner is large, and the outdoor environment has high-risk environmental conditions such as high temperature, high humidity, high dust, high magnetic noise, and vibration. Especially, the outdoor unit of the air conditioner introduces high-humidity, strongly corrosive, and high-dust gases into the power distribution room, affecting the use environment of the frequency converter. Facing the urgent needs of the energy situation and energy conservation and consumption reduction, and objective factors such as the construction period, project safety quality, and application space limitation of many projects, to varying degrees, they also restrict the smooth implementation of high-voltage frequency conversion energy-saving projects and the realization of the sustainable development goal. Aiming at a series of problems generated and brought about in the application of high-voltage frequency converters, a cooling system is urgently needed to solve the indoor heat dissipation problem of a power distribution room equipped with multiple high-power frequency converters. Content of the Utility Model
[0004] In order to solve the problems in the prior art that the temperature in the power distribution room is high, the method of installing an air conditioner indoors cannot meet the heat dissipation requirements of the frequency converter, and there are also a series of problems such as large energy consumption and large energy expenses, the utility model provides a cooling system for a frequency converter in a power distribution room.
[0005] The utility model provides a cooling system for a frequency converter in a power distribution room, which includes an air-cooled unit. The air outlet of the indoor unit of the air-cooled unit faces the frequency conversion cabinet group directly. The air inlet of the indoor unit of the air-cooled unit is connected to the top of the frequency conversion cabinet group through a hot air duct and an air inlet flange. The hot air duct extends outdoors to form an emergency air duct. A valve is provided at the air outlet of the emergency air duct. The outdoor unit of the air-cooled unit is installed outdoors in cooperation.
[0006] During implementation, the system includes an air-cooled unit. The air outlet of the indoor unit of the air-cooled unit faces the inverter cabinet, blowing cool air around the inverter cabinet to lower the temperature. The air inlet of the indoor unit of the air-cooled unit is connected to the top of the inverter cabinet through a hot air duct and an air inlet flange to collect hot air and improve cooling efficiency. Specifically, a fan hood is installed on the top of the inverter cabinet, and a hot air duct is installed at the end of the fan hood. The hot air duct extends to the outside and is equipped with an emergency air duct for hot air discharge in special circumstances. A valve is installed at the exhaust port of the emergency air duct. The outdoor unit of the air-cooled unit is installed outdoors.
[0007] Specifically, the frequency converter cabinet group includes multiple frequency converter cabinets, and each frequency converter cabinet group includes at least two frequency converter cabinets that serve as backups for each other, usually two or three, and the frequency converter cabinets in the same group are connected to the same hot air duct.
[0008] Furthermore, the frequency converter cabinet group includes a main frequency converter cabinet and a secondary frequency converter cabinet. The main frequency converter cabinet and the secondary frequency converter cabinet are installed adjacent to or opposite each other. The main frequency converter cabinet and the secondary frequency converter cabinet are used in pairs and one is spared. The top of the main frequency converter cabinet and the top of the secondary frequency converter cabinet are connected to the hot air duct branch pipe through their respective fan covers. The hot air duct branch pipes converge into the hot air duct, and the hot air duct is connected to the air inlet of the indoor unit.
[0009] The air-cooled unit in this device adopts a centralized control system with temperature and humidity monitoring, anti-condensation and dehumidification control functions. Through the design of multiple modules, the modules can be used as backups for each other. Each module is designed to operate independently, and a local failure will not affect the normal operation of the frequency converter, ensuring that the unit can still operate normally even if any module is out of service.
[0010] During operation, cool air is blown towards the inverter cabinet through the air outlet of the indoor unit. The hot air from the inverter cabinet rises and is collected into the hot air duct through the fan cover, entering the indoor unit of the air-cooled unit. The indoor unit exchanges heat between the air and the refrigerant, and then blows the cooled air towards the inverter cabinet, forming a closed air circulation. This avoids airflow between the indoor and outdoor units, creating a closed cooling circulation system. It also prevents the introduction of high-humidity, highly corrosive, and dusty outdoor gases into the power distribution room, and the heat is carried away by the air-cooled unit installed outdoors.
[0011] In addition, in the event of a power outage, open the valve at the exhaust vent of the emergency air duct to dissipate the hot air in the hot air duct to the outside, preventing heat buildup at the frequency converter cabinet and thus avoiding equipment damage.
[0012] Compared with the prior art, the present invention has the following beneficial effects:
[0013] The present invention provides a power distribution room frequency converter cooling system, which uses a closed-loop air-cooled unit to cool the frequency converter. After the frequency converter room is modified with an air-cooled unit system, a clean indoor environment can be guaranteed, effectively avoiding the impact of external moisture and dust on the operation of the frequency converter.
[0014] In terms of temperature control, it can monitor temperature and humidity, actively dehumidify and prevent condensation, and stably control the operating temperature of the frequency converter at 20~30℃ (the recommended optimal setting temperature is 26~30℃). The air duct design is optimized for the large air volume characteristics of the frequency converter to ensure that the indoor air speed and air volume meet the requirements.
[0015] In terms of energy saving and reliability, the system saves 0-30% more energy than ordinary air conditioners. It adopts an N-module design with modules serving as backups for each other. Local failures do not affect the overall operation. It also has fully automatic unattended operation, a comprehensive protection system, and automatic fault detection function.
[0016] In terms of environmental protection, the fully enclosed circulation isolates dust and moisture, prevents external moisture and dust from entering, simplifies the layout of air ducts, saves materials and labor, and effectively avoids the impact of the external environment on the operation of the frequency converter.
[0017] In addition, the system has a one-screen centralized control function, which can monitor multiple parameters and provide historical data database queries. It adopts an industrial-grade design with a low failure rate, fundamentally solving problems such as high heat dissipation of frequency converters, indoor humidity, high temperature, condensation, and high maintenance requirements. It effectively improves the safety and reliability of frequency converter operation, extends service life, and reduces operating costs. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the present invention.
[0019] Figure 2 This is a schematic diagram of the installation of an embodiment of the present invention.
[0020] The markings in the diagram are as follows: 1-Indoor unit, 2-Outdoor unit, 3-Variable frequency cabinet, 301-Variable frequency cabinet, 4-Hot air duct, 5-Emergency air duct, 6-Steel foundation, 7-Air hood, 8-Air inlet flange, 9-Valve. Detailed Implementation
[0021] The specific embodiments of this utility model will now be described with reference to the accompanying drawings.
[0022] A cooling system for frequency converters in a power distribution room, such as Figure 1 , 2As shown, in this embodiment, the power distribution room is located on the top floor and includes an air-cooled unit installed on a concrete / channel steel foundation 6 to ensure stable installation of the air-cooled unit. The air outlet of the indoor unit 1 of the air-cooled unit faces the frequency converter cabinet 3. The air inlet of the indoor unit 1 of the air-cooled unit is connected to the top of the frequency converter cabinet 3 through a hot air duct 4 and an air inlet flange 8. Specifically, a fan hood 7 is installed on the top of the frequency converter cabinet 3, and a hot air duct 4 is installed at the end of the fan hood 7. The hot air duct 4 extends to the outside and is equipped with an emergency air duct 5. A valve 9 is installed at the exhaust port of the emergency air duct 5. The outdoor unit 2 of the air-cooled unit is installed outdoors, either on an external wall cantilever platform or on the roof. In this embodiment, the outdoor unit installed on the roof is not... Figure 1 The bid was successful.
[0023] In this embodiment, the frequency converter cabinet group 3 includes 5 groups of frequency converter cabinets. Each group of frequency converter cabinets includes at least two frequency converter cabinets that are backups for each other. The frequency converter cabinets in the same group are connected to the same hot air duct 4. The frequency converter cabinet group 3 includes a group of main frequency converter cabinets and auxiliary frequency converter cabinets. The main frequency converter cabinets and auxiliary frequency converter cabinets are installed adjacent to each other or facing each other. The main frequency converter cabinets and auxiliary frequency converter cabinets are used one and the backup one. The indoor unit 1 of the air-cooled unit is installed based on the usage frequency of the main frequency converter cabinets and auxiliary frequency converter cabinets. The top of the main frequency converter cabinet and the top of the auxiliary frequency converter cabinet are connected to the hot air duct branch pipe through their respective fan covers 7. The hot air duct branch pipes converge into the hot air duct 4. The hot air duct 4 is connected to the air inlet of the indoor unit 1.
[0024] In use, cool air is blown from the air outlet of indoor unit 1 to inverter cabinet 301. The hot air in inverter cabinet 301 dissipates upwards and is recovered into hot air duct 4 through the air cover, entering indoor unit 1 of the air-cooled unit. Indoor unit 1 exchanges heat between the air and the refrigerant, and then blows the cooled air back to inverter cabinet 301, forming a closed air circulation. This avoids airflow between indoor and outdoor environments, forming a closed cooling circulation method. It also prevents the introduction of high humidity, highly corrosive, and dusty outdoor gases into the power distribution room, and the heat is carried away by the air-cooled unit installed outdoors.
[0025] In addition, in the event of a power outage, open valve 9 at the exhaust port of emergency air duct 5 to dissipate the hot air in hot air duct 4 to the outside, thus preventing heat buildup at frequency converter cabinet 301 and causing equipment damage.
[0026] The scope of protection claimed by this utility model is not limited to the specific embodiments described above. Moreover, for those skilled in the art, this utility model can have various modifications and alterations. Any modifications, improvements, and equivalent substitutions made within the concept and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A power distribution room frequency converter cooling system, characterized by: The air-cooled unit comprises an indoor unit (1) and an outdoor unit (2), the indoor unit (1) of the air-cooled unit is opposite to a variable frequency cabinet group (3), the air inlet of the indoor unit (1) of the air-cooled unit is connected with the top of the variable frequency cabinet group (3) through a hot air duct (4) matched with an air inlet flange (8), the hot air duct (4) extends to the outside and is provided with an emergency air duct (5), a valve (9) is arranged at the air outlet of the emergency air duct (5), and the outdoor unit (2) of the air-cooled unit is matched and installed outdoors.
2. A power distribution room frequency converter cooling system as claimed in claim 1, wherein: The top of the variable frequency cabinet group (3) is provided with a wind cover (7), and the tail end of the wind cover (7) is provided with the hot air duct (4).
3. The power distribution room frequency converter cooling system of claim 1, wherein: The variable frequency cabinet group (3) comprises a plurality of variable frequency cabinets, each of which comprises at least two standby variable frequency cabinets, and the variable frequency cabinets in the same group are connected with the same hot air duct (4).
4. A power distribution room frequency converter cooling system as set forth in claim 3, wherein: The variable frequency cabinet group (3) comprises a group of main variable frequency cabinets and auxiliary variable frequency cabinets, one main variable frequency cabinet and one auxiliary variable frequency cabinet are used in the variable frequency cabinet group (3), the top of the main variable frequency cabinet and the top of the auxiliary variable frequency cabinet are connected with hot air duct branches through respective wind covers (7), the hot air duct branches converge in the hot air duct (4), and the hot air duct (4) is connected with the air inlet of the indoor unit (1).
5. A power distribution room frequency converter cooling system as set forth in claim 4, wherein: The main variable frequency cabinet and the auxiliary variable frequency cabinet are adjacent or opposite to each other.