A three-pipe multifunctional multi-connected air-conditioning system and its control method

Abstract

The invention belongs to the technical field of air conditioning, and discloses a three-pipe multifunctional multi-connected air conditioning system and its control method. One end is respectively connected with the inlet and outlet of the compressor through two branches, the first end of the evaporator in the machine room is connected with the inlet of the compressor, and the first end of the evaporator in the machine room is provided with a second throttling device; the indoor evaporator, The second end of the evaporator in the machine room is provided with a first throttling device, and the second ends of the indoor evaporator, the evaporator in the machine room, and the condenser are connected to each other. The present invention couples the multi-connection unit with the air conditioner in the computer room, and the two can work independently, and can solve the problems of the multi-connection unit in small load operation, lubrication, oil return, frosting and defrosting, start and stop, etc., recover the waste heat in the computer room, save space, and reduce the Equipment cost; the second throttling device makes the evaporator in the machine room and the indoor evaporator have different evaporation temperatures, ensuring the cooling effect of the evaporator in the machine room.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a three-control multifunctional multi-connected air conditioning system and a control method thereof. Background technique [0002] With the rapid development of the digital construction of the information industry and the intelligentization of home appliances, the number of computer rooms and base stations has increased rapidly. Due to the large sensible heat load of the data center and the closed enclosure structure, the air conditioning systems of the computer rooms and base stations need to be refrigerated all year round; and the room The air-conditioning system is mainly used for heating in winter and cooling in summer. According to statistics, the energy consumption of air-conditioning in computer rooms and base stations accounts for more than 40% of the total energy consumption; The operation process is relatively independent; in winter and other low-temperature s...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: in order to solve the problem that the existing indoor multi-connected air conditioner and the computer room air conditioner are installed separately, the waste heat in the computer room cannot be recovered, and the indoor air conditioner has problems such as low-frequency operation of the compressor, low-temperature startup, lubrication, energy regulation, etc.

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