Multi-unit air conditioner and control method

Abstract

A multi-unit air conditioner includes: an outdoor unit including a flow path control valve for controlling the flow path of refrigerant from a compressor, an outdoor heat exchanger one side of which communicates with the flow path control valve, a first side One end of the first bypass line is connected to the first line connecting the flow path control valve and the outdoor heat exchanger, and the other end is connected to the second line connected to the other end of the outdoor heat exchanger. a control valve provided on the first bypass line for controlling the flow rate of refrigerant passing through the first bypass line; an indoor unit having an indoor heat exchanger and an indoor electronic expansion valve installed in each room; a distributor, for selectively distributing refrigerant received through one of the two lines connected to the outdoor unit to the indoor unit and returning the refrigerant to the outdoor unit through the other line; and a control device for measuring the The gas / liquid mixing ratio of the refrigerant in the refrigerant is combined after passing through the first bypass line and the outdoor heat exchanger respectively. The control device is used to control the opening of the flow control valve, thereby controlling the mixing ratio.

Description

[0001] This application claims priority from Korean Application No. P2002-32901 filed on Jun. 12, 2002, the contents of which are incorporated herein by reference. technical field [0002] The invention relates to a multi-unit air conditioner, in particular to a multi-unit air conditioner with an improved outdoor piping system and a refrigerant mixing ratio control system and a control method thereof. Background technique [0003] Generally, an air conditioner is a device used to cool or heat spaces, such as living spaces, restaurants, and offices. Currently, in order to efficiently cool or heat a space divided into a plurality of rooms, multi-unit air conditioners have been continuously developed. A multi-unit air conditioner typically has an outdoor unit and multiple indoor units, each of which is connected to the outdoor unit and installed indoors to cool or heat the room, operating in one of cooling or heating modes . [0004] However, even if some rooms require heatin...

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Problems solved by technology

[0004] However, even if some rooms require heating and other rooms require cooling in the divided space, the multi-unit air conditioner can only operate in a uniform cooling mode or heating mode, and the multi-unit air conditioner suffers from the aspect of not being able to properly meet the requirements. limit

[0005] For example, even in buildings where the temperature of the rooms varies by location or time of day, rooms on the north side of the building require heating, and rooms on the south side of the building are exposed to the sun and require cooling. Multi-unit air conditioners that operate in single mode are out of the question

[0006] In addition, buildings equipped with computer rooms require cooling not only in summer but also in winter to solve the heat load problem of computer-related equipment, and the prior art multi-unit air conditioners cannot adequately address this requirement

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