Multistage compression air-conditioner

Abstract

The invention relates to a multi-compression air-condition device, comprising a plurality of compressors which are arranged in an annular structure and connected with each other, and more than one of which are combined with each other; a liquid storage tank which is communicated with a plurality of compressors; a check valve which is respectively arranged at the exit sides of a plurality of compressors; and a control part which is connected on the compressors and the check valve and is used for adjusting the actions of the compressors and the check valve. The combinations of more than one of the compressors which are combined with each other are in sequence changed at each preset time along the array direction of a plurality of compressors in the control of the control part, so that a plurality of compressors can operate alternately according to the preset time alternation. The invention can satisfy the load capacity of a compound air-condition device which is provided with a plurality of indoor units only through one outdoor unit. A plurality of compressors can operate alternately, thereby preventing the load from concentrating on a certain compressor among a plurality of compressors in the operation of continuous refrigeration or heating, and avoiding the over operation event of a certain compressor. Besides, the invention has the advantages of increasing the durability of the compressor and prolonging the service life of the compressor.

Description

technical field [0001] The invention relates to an air conditioner. In particular, it relates to a multi-stage compression air conditioner in which multiple compressors are connected to each other, and multiple compressors are operated in combination according to indoor cooling or heating loads, and the combination is sequentially changed at predetermined time intervals, thereby alternately operating multiple compressors. device. Background technique [0002] Generally, an air conditioner is a system that cools the indoor environment through the repeated process of inhaling hot air in the room, exchanging it with a low-temperature refrigerant, and outputting the heat-exchanged air to the room. On the contrary, the system for heating the indoor environment is composed of compressor-condenser-expansion valve-evaporator, forming a series of cycles. [0003] Moreover, recently, in addition to the cooling / heating function, the air conditioner also has the function of filtering ...

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Problems solved by technology

[0015] As a result, it will lead to an increase in the cost of making up the air conditioning system

[0016] In addition, in order to cope with various cooling and heating loads, it is necessary to combine compressors 22 of different capacities, which increases the overall production cost including the development cost of the compressor 22 and the manufacturing cost.

[0017] Moreover, in the air conditioning system, the use environment with small cooling and heating loads will appear more frequently, so repeated operation of a specific outdoor unit 20 or a specific compressor 22 will not only reduce the life of the outdoor unit 20, but also require frequent maintenance

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