Machine room air conditioner heat recovery system and control method thereof

Abstract

The invention relates to a machine room air conditioner heat recovery system. The system comprises a compressor unit, a first condenser, a throttling device and an evaporator; the compressor unit andthe first condenser are connected through a heat recovery loop and a first bypass loop which are arranged in parallel, the heat recovery loop is provided with a second condenser, the second condenseris fixedly arranged on the air inlet side of a household or commercial air conditioner outdoor unit heat exchanger, the heat recovery loop and the first bypass loop are provided with a control valve used for switching the heat recovery loop or the first bypass loop, and therefore a machine room air conditioner is started or retreated out of the heat recovery mode. Heat released by the second condenser is used for preheating inlet air of the household or commercial outdoor unit heat exchanger during heating, the evaporation temperature of the outdoor unit heat exchanger is improved, and the low-temperature heating capacity and the heating energy efficiency ratio of the household or commercial air conditioner can be improved. The invention further provides a control method of the machine room air conditioner heat recovery system. The automatic control over the machine room air conditioner heat recovery system is achieved.

Description

technical field [0001] The invention relates to the field of refrigerating and air-conditioning devices, and more specifically relates to a heat recovery system for a computer room air-conditioning system and a control method thereof. Background technique [0002] One of the characteristics of the air conditioner in the computer room is year-round cooling, which means that no matter the outdoor temperature is high or low, it needs to dissipate heat from the outside. It is a trend for computer room air conditioners to use natural cooling sources. Among them, fluorine pump natural cooling is one of the best solutions for computer room air conditioners to use natural cooling. [0003] On the other hand, the surrounding household or commercial air conditioners that are matched with computer room air conditioners usually have low-temperature heating requirements, and the lower the outdoor temperature, from the perspective of the compressor system, the low-temperature heating capa...

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Problems solved by technology

[0003] On the other hand, the surrounding household or commercial air conditioners that are matched with computer room air conditioners usually have low-temperature heating requirements, and the lower the outdoor temperature, from the perspective of the compressor system, the low-temperature heating capacity and heating capacity of household or commercial air conditioners The lower the energy efficiency ratio is; at the same time, when the outdoor temperature is low, the outdoor units of household and commercial air conditioners will also have the problem of frosting, so that the heating cannot be continued.

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