Cooling water dry air-conditioning box, control system and control method thereof

Abstract

The invention relates to a cooling water dry air-conditioning box, a control system and a control method thereof, which comprise an air-conditioning box machine casing and a fan disposed in the machine casing. The machine casing is divided into a positive pressure cavity and a negative pressure cavity through a separating plate. An air outlet of the fan is located in the positive pressure cavity, and an air inlet of the fan is located in the negative pressure cavity. An indoor air supply port and an indoor air supply valve as well as an air port and an air valve which are connected to an air-conditioner are further arranged in the positive pressure cavity. A tube wing heat exchanger and a cabinet heat return air inlet are disposed in the negative pressure cavity along the direction converse to the airflow. The cooling water dry air-conditioning box, the control system and the control method thereof can utilize a cooling water system of outdoor water evaporation cooling to the maximum degree, produces cooling water with the temperature close to wet bulb temperature and then sends the cooling water to an indoor dry air-conditioning box through a water pipe so as to cool indoor air. A system of the cooling water dry air-conditioning box is suitable for all areas and has the best yearly all-around energy-saving effect compared with other machine room cooling energy-saving techniques.

Description

technical field [0001] The invention relates to a dry-type air-conditioning box that uses cooling water to cool indoor air. It is very suitable for places such as communication rooms, electric rooms, and computer rooms with large heat loads and long operating hours throughout the year. When the temperature is lower than 22°C, the air conditioner is not required to bear the indoor heat load alone. When the wet bulb temperature is higher than 22°C, it is used to bear part of the load of the heat exhaust air on the top of the cabinet. The year-round power saving effect is very significant. Background technique [0002] At present, due to the large heat load in a large number of communication equipment rooms, the power consumption of air conditioners exceeds more than 50% of the total power consumption of the equipment rooms, and even in winter, the air conditioners in the equipment rooms still need to be turned on. Measures to improve the energy efficiency of compressed air co...

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Problems solved by technology

[0003] The heat pipe heat exchanger and ethylene glycol heat exchanger using outdoor natural cooling source exchange heat under the condition of outdoor dry bulb temperature, and the indoor heat exchanger has no design and control technology that can pre-cool the hot exhaust air of the cabinet , so the comprehensive energy saving rate is small;

[0004] However, the use of well water cooling technology has the uncertainty of water source

[0005] Since the intelligent pure fresh air system introduces a large amount of fresh air (the number of fresh air changes is generally more than 30 times per hour), there are problems such as fresh air filtration and possible harmful gases in the fresh air, which cannot meet the cleanliness requirements of the first and second types of communication equipment rooms. Can only be used for some three types of computer room base stations

[0006] The fresh air water curtain equipment (water evaporative air conditioner) has an isenthalpic cooling of the fresh air, so the energy saving rate is much higher than that of the pure ventilation system, but also due to the fresh air filtration and possible harmful gases, it cannot meet the requirements of the first and second types of computer rooms. Require

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