Multe-unit air conditioner and control method

Abstract

Multi-unit air conditioner including an outdoor unit including a flow path control valve for controlling a flow path of refrigerant from a compressor, outdoor heat exchanger having one side in communication with the flow path control valve, a first bypass pipeline having one end connected to the first pipeline which makes the flow path control valve and the outdoor heat exchanger to be in communication, and the other end connected to the second pipeline connected to the other end of the outdoor heat exchanger, and a flow rate control valve provided on the first bypass pipeline for controlling a flow rate of the refrigerant passing through the first bypass pipeline, an indoor unit having an indoor heat exchanger and indoor electronic expansion valve installed in each of rooms, a distributor for selective distribution of the refrigerant received through one of two pipelines connected to the outdoor unit to the indoor units, and returning to the outdoor unit through the other one pipeline and controlling means for measuring a gas / liquid mixing ratio of the refrigerant introduced into the distributor, the refrigerant having joined after respectively passing through the first bypass pipeline and the outdoor heat exchanger, for controlling an opening of the flow rate control valve, to control the mixing ratio.

Description

[0001] This application claims priority to Korean Application No. P2002-32901 filed June 12, 2002, the contents of which are hereby incorporated 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 heating and...

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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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