Air conditioner

Abstract

The invention discloses an air conditioner. The air conditioner controls capacity of an outdoor heat exhanger unit and is not equipped with a switch valve with high pressure loss, preventing a refrigerant from accummulating in the outdoor heat exchanger and keeping reliability of a compressor or refrigeration cycle. The air conditioner comprises a first expansion valve on a liquid pipeline of a first outdoor heat exchanger; a second expansion valve on a liquid pipeline of a second outdoor heat exchanger; a first connecting pipeline that enables a sunction pipeline to be connected to a port of a first four-way valve and is connected with the sunction port of the compressor and the outdoor heat exhanger unit; a second connecting pipeline that enables a sunction pipeline to be connected to a port of a second four-way valve; and a check valve that is disposed on the second connecting pipeline to only allow the refrigerant to flow from the second four-way valve to the sunction pipeline.

Description

technical field [0001] Various embodiments of the present disclosure relate to an air conditioner including an outdoor heat exchanger unit configured by connecting a plurality of outdoor heat exchangers in a row, the capacity of the outdoor heat exchanger unit being controllable during low load operation. Background technique [0002] For example, when the air conditioner is operating under low-load operating conditions—that is, during heating operation with low indoor air-conditioning load and high outdoor temperature or cooling operation with low indoor air-conditioning load and low outdoor temperature— , the evaporation or condensation capacity of the outdoor heat exchanger increases excessively, causing problematic operation. More specifically, if the evaporation capacity of the outdoor heat exchanger increases excessively during heating operation under low-load operating conditions, the discharge pressure of the compressor also increases excessively beyond its upper lim...

AI Technical Summary

Problems solved by technology

[0005] However, since a plurality of electronic on-off valves are provided at the front and rear sides of each outdoor heat exchanger, the conventional air conditioner constructed as described above suffers from high pressure loss during the flow of refrigerant, thus making the manufacturing process difficult. Deteriorated heating or cooling performance

However, the use of large-sized electronic switching valves to reduce pressure loss is disadvantageous in cost

In addition, although it is conceivable to reduce the number of electronic switching valves, for example, by installing electronic switching valves only on the front side or rear side of each outdoor heat exchanger, this will cause refrigerant in the outdoor heat exchangers to Accumulation of the refrigerant, thereby deteriorating the flow rate of the refrigerant and the cooling or heating performance

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