Three-control multi-connected indoor unit and three-control multi-connected

Abstract

The invention discloses an indoor unit of a three-pipe multi-split air conditioner and the three-pipe multi-split air conditioner. The indoor unit of the three-pipe multi-split air conditioner comprises a reheater, an indoor heat exchanger and a rectifier. One end of the reheater is connected with a high-low pressure valve, one end of the indoor heat exchanger is connected with an air-side valve,and the rectifier is connected with a liquid-side valve through a first pipeline, connected with the other end of the indoor heat exchanger through a second pipeline and connected with the other end of the reheater through a third pipeline. According to the indoor unit of the three-pipe multi-split air conditioner, since the rectifier is arranged, when a constant-temperature dehumidification modeof the three-pipe multi-split air conditioner is operated, two refrigerants with different temperatures can be mixed and exchange heat in the rectifier, so that the temperature of the refrigerant flowing out of the rectifier is balanced and stable; and the air-liquid content ratio of the refrigerant flowing out of the rectifier can be uniform and stable, so that operation stability and reliabilityof the indoor unit are improved, operation noise of the indoor unit is lowered, and the user experience of the indoor unit is improved.

Description

technical field [0001] The present invention relates to the technical field of air conditioners, in particular to a three-control multi-connected indoor unit and a three-control multi-connected unit. Background technique [0002] In addition to the basic cooling and heating functions, air conditioners generally have dehumidification kinetic energy, but in terms of dehumidification methods, there is no essential difference between them and cooling operations. However, simply dehumidifying through the cooling mode of the air conditioner will inevitably reduce the indoor temperature, which will inevitably increase the discomfort of the human body during the rainy season when the temperature is not high and the humidity is high. Therefore, constant temperature dehumidification technology has emerged as the times require. [0003] In the related technology, the constant temperature dehumidification technology mainly controls the start and stop of the compressor to ensure the room...

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Problems solved by technology

[0003] In the related technology, the constant temperature dehumidification technology mainly controls the start and stop of the compressor to ensure the room temperature, and also increases the outlet air temperature of the air conditioner by adding an electric auxiliary heating device, but at the expense of high-grade electric energy to obtain low-grade heat for heating The air supply will inevitably cause a waste of energy, so the constant temperature dehumidification method of using high-temperature and high-pressure refrigerant to heat the air supply has merits

[0004] In the related technology, when the indoor unit is performing constant temperature dehumidification, there is a temperature difference between the refrigerant passing through the reheater and the main refrigerant of the liquid pipe, and at the same time, there may be a gas-liquid two-phase state in the two refrigerants, which affects the stability of the air conditioner. At the same time, there will be a loud sound of refrigerant flushing the evaporator, which reduces the user experience of the air conditioner

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