Multimachine air conditioner and operating method for controlling outdoor machine fan

Abstract

Multi-unit air conditioner for independent cooling / heating of each room including an outdoor unit, a distributor and a plurality of indoor units, wherein the outdoor unit and the distributor are connected with two piping specifically defined as a high pressure section and a low pressure section. The outdoor unit includes an outdoor unit piping for connecting different elements, a bypass piping for bypassing refrigerant depending on operation a condition, arid a plurality of refrigerant flow control valves for controlling a refrigerant flow. The distributor includes a gas-liquid separator for separating the refrigerant into gas refrigerant and liquid refrigerant, for selectively leading refrigerant from the outdoor unit to a plurality of indoor units according to different operation conditions for independent cooling and heating of each room. Method for controlling operation of an outdoor unit fan in a multi-unit air conditioner includes the steps of measuring a temperature of gas-liquid mixture refrigerant from an outdoor unit heat exchanger, comparing a measured refrigerant temperature and a preset refrigerant temperature, to detect a gas-refrigerant mixture ratio of the refrigerant, and varying a rotational speed of an outdoor unit fan so that a detected gas-liquid mixture ratio is identical to a preset gas-liquid mixture ratio required for an intended operation condition.

Description

Technical field [0001] The invention relates to a multi-unit air conditioner. Background technique [0002] Generally, an air conditioner is a device used to cool or heat a space environment, such as living spaces, restaurants, and offices. Now, in order to effectively cool or heat the space divided into multiple rooms, the continuous development of multi-unit air conditioners has become a trend. Multi-unit air conditioners are usually provided with one outdoor unit and multiple indoor units, each of which is connected to the outdoor unit and installed indoors to cool or heat the indoor space when operating in one of the cooling mode or heating mode . [0003] However, even if one of the multiple rooms in the divided space needs heating and the other rooms need cooling, the multi-unit air conditioner can only operate one mode of cooling or heating uniformly. Therefore, the multi-unit air conditioner In this regard, there are needs that cannot be properly addressed. [0004] For e...

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Problems solved by technology

[0003] However, even if one of the rooms in the divided space requires heating while the other rooms require cooling, the multi-unit air conditioner can only operate in one mode of cooling or heating uniformly, and therefore, the multi-unit air conditioner in There are constraints in this area of ​​demand that cannot be adequately addressed

[0004] For example, even in a building, the temperature of the room is different depending on the location and time of the room. For example, while the room on the north side needs to be heated, the room on the south side needs to be cooled due to sunlight. Multi-unit air conditioners that operate in a single mode cannot solve

[0005] Furthermore, even if a building equipped with a computer room needs to be cooled not only in summer but also in winter to solve the problem of heat load of computer-related equipment, the prior art multi-unit air conditioner cannot adequately address this need

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