Three-pipe heat recovery multi-split air conditioner and outdoor unit thereof

Abstract

The invention discloses an outdoor unit of a three-pipe heat recovery multi-split air conditioner. The outdoor unit comprises a compressor, an oil separator, a first heat exchanger and a second heat exchanger, wherein an inlet of the oil separator is communicated with a liquid outlet of the compressor, the first heat exchanger is communicated with a liquid outlet of the oil separator through a first four-way valve, and an outlet pipe of the first heat exchanger is provided with a first throttle part; the first throttle part and the second throttle part are respectively connected with an inlet of a gas liquid separator through a connecting pipe; the outdoor unit is provided with two heat exchangers which can be respectively used as a condenser and an evaporator, the flows of the two heat exchangers can be adjusted through the first throttle part and the second throttle part, the load requirements of a refrigerating room and a heating room can be met, and the best energy distribution effect can be achieved. The invention further provides an air conditioner applying the outdoor unit, which can meet the load demands of the refrigerating room and the heating room, and is low in energy consumption.

Description

technical field [0001] The present invention relates to the technical field of machinery industry, and more specifically, relates to an outdoor unit of a three-pipe heat recovery multi-connection air conditioner, and also relates to a three-pipe heat recovery multi-connection air conditioner. Background technique [0002] With the development of society, air conditioners are more and more widely used in people's production and life. [0003] The three-pipe heat recovery multi-split air conditioner includes an outdoor unit and multiple indoor units. The outdoor unit has only one heat exchanger. When some indoor units are in cooling mode and the other part is in heating mode, the two indoor The load of the outdoor unit is different, and the load of the indoor unit changes instantly with the opening of the indoor unit. As a result, the output of the compressor of the outdoor unit needs to be set to be larger to meet the load requirements of the cooling room and the heating room...

AI Technical Summary

Problems solved by technology

[0003] The three-pipe heat recovery multi-split air conditioner includes an outdoor unit and multiple indoor units. The outdoor unit has only one heat exchanger. When some indoor units are in cooling mode and the other part is in heating mode, the two indoor The load of the outdoor unit is different, and the load of the indoor unit changes instantly with the opening of the indoor unit. As a result, the output of the compressor of the outdoor unit needs to be set to be larger to meet the load requirements of the cooling room and the heating room at the same time, resulting in three-pipe heating. Recycling outdoor units of multi-connected air conditioners consumes a lot of energy

[0004] In addition, in the existing three-pipe heat recovery multi-connection unit, there is only one heat exchanger in the outdoor unit. When the heat exchanger is frosted under heating conditions, it is necessary to use the four-way valve to reverse the direction to defrost. However, after the four-way valve is reversed, low-temperature and low-pressure refrigerant enters the indoor unit, causing the user to be unable to open the indoor unit, and the indoor unit cannot complete the heating work, which is not convenient for users to use.

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