Machine room air conditioner system and control method thereof

Abstract

The invention provides a machine room air conditioner system and a control method thereof. The machine room air conditioner system comprises a refrigeration circulating system and a heat pipe loop system. The refrigeration circulating system comprises a compressor, a condenser, a throttling device and an evaporator which are all connected with one another. A controller controlling the compression ratio of the compressor is arranged on the compressor. The controller is connected with a temperature sensor arranged outside a machine room. The heat pipe loop system comprises a fluorine pump and a heat pipe which are connected with the condenser and the evaporator; the heat pipe loop system is formed by the fluorine pump, the heat pipe, the condenser and the evaporator; and the heat pipe loop system can cool the machine room through a natural cold source outside the machine room. According to the technical scheme, on one hand, the compression ratio can be automatically adjusted by the machine room air conditioner system according to the outside temperature, and therefore the compressor can perform variable-compression-ratio work; and on the other hand, the machine room air conditioner system can cool the machine room through the outside natural cold source in winter and other cold seasons, and therefore the energy consumption of the machine room air conditioner system can be reduced.

Description

technical field [0001] The present invention relates to the technical field of air conditioning, in particular to a machine room air conditioning system and a control method thereof. Background technique [0002] The computer room air conditioning system is a high-precision air conditioner specially used in the computer room. It can not only control the temperature of the computer room, but also control the humidity at the same time. Therefore, the computer room air conditioner is an important equipment in the computer room. At present, common computer room air conditioners use compressors with fixed compression ratios, and the compression ratio is generally around 3. But for computer rooms, the temperature of the computer room is fixed, so the required evaporation pressure is also fixed, but the temperature of the external environment is different. It changes with the seasons. For example, a certain series of air conditioners use R22 (chlorodifluoromethane) as the refrigera...

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Problems solved by technology

At present, common computer room air conditioners use compressors with fixed compression ratios, and the compression ratio is generally around 3. But for computer rooms, the temperature of the computer room is fixed, so the required evaporation pressure is also fixed, but the temperature of the external environment is different. It changes with the seasons. For example, a certain series of air conditioners use R22 (chlorodifluoromethane) as the refrigerant, and the evaporation pressure is generally 6.5bar (pressure unit, and 1bar is equal to 100 kPa). , the outdoor ambient temperature is relatively high, and the condensing pressure requirement is 19.5bar, so the compression ratio is exactly 19.5 / 6.5=3, indicating that the current compressor is suitable for summer working conditions, but in transitional seasons such as autumn and spring, the required evaporating pressure It is still 6.5bar, and the outdoor ambient temperature is relatively low at this time. Taking 20°C as an example, the condensing pressure requirement at this time is 13bar. Therefore, the required compression ratio is 13 / 6.5=2, and when the ambient temperature is 10°C , at this time, the condensing pressure requirement is 10bar, and the required compression ratio is 10 / 6.5=1.54, especially in the cold winter, when the outdoor temperature is mostly less than 5°C, no condensing pressure is needed at this time, that is, no compressor is needed, just The cooling of the machine room can be completed by using the natural cold source outside the machine room. Therefore, in seasons such as spring, autumn and winter, the compressor with a fixed compression ratio does not match the working pressure required by the outside world, which will lead to high energy consumption of the compressor. , although in related technologies, there is also a solution to achieve low energy consumption and heat dissipation in the computer room by reducing the fan speed, but this solution still has problems such as cold start of the compressor in low temperature seasons, and the frequent start and stop of the fan has a great impact on system stability.

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