Multi-connected air-conditioner unit outdoor unit module and method for heating and defrosting at the same time through same

Abstract

The invention discloses a multi-connected air-conditioner unit outdoor unit module and a method for heating and defrosting at the same time through the multi-connected air-conditioner unit outdoor unit module. The module comprises a compressor (1), a four-way reversing valve (2), two outdoor heat exchangers, two outdoor unit electronic expansion valves and five solenoid valves. The compressor (1) is communicated with the four-way reserving valve (2), the first solenoid valve (7) and the second solenoid valve (8). The four-way reserving valve (2) is communicated with the third solenoid valve (9) and the fourth solenoid valve (10). The first solenoid valve (7) and the third solenoid valve (9) are communicated with a first outdoor heat exchanger (3). The second solenoid valve (8) and the fourth solenoid valve (10) are connected with a second outdoor heat exchanger (5). A connection pipe (13) with the fifth solenoid valve (11) is arranged between the two outdoor heat exchangers. The method is characterized in that one outdoor heat exchanger conducts conventional heating circulation while the other outdoor heat exchanger conducts defrosting circulation. By means of the multi-connected air-conditioner unit outdoor unit module and the method, a room can be heated continuously while defrosting is conducted.

Description

technical field [0001] The invention relates to a multi-connected air-conditioning unit, in particular to an outdoor unit module of a multi-connected air-conditioning unit (referred to as a multi-connected unit) and a method for using the module to heat and simultaneously defrost. Background technique [0002] The multi-connected air conditioner unit in the prior art includes one or more outdoor unit modules (referred to as outdoor units), multiple indoor unit modules connected in parallel (referred to as indoor units), and two refrigerant circulation lines connecting each indoor unit and each outdoor unit. steward. If there is one outdoor unit, the outdoor unit is connected to multiple indoor units connected in parallel through two refrigerant circulation main pipes; if there are multiple outdoor units, multiple outdoor units are connected in parallel, and the parallel outdoor units pass through two refrigerant circulation main pipes Connect with the indoor unit connected ...

AI Technical Summary

Problems solved by technology

[0007] The traditional defrosting method has the following defects: First, during the defrosting process, the unit is in cooling operation, which cannot keep the room heating, and the room temperature drops accordingly. Carry out one defrosting, and the defrosting time lasts for 5-8 minutes. In this way, it can be said that at least 20% of the time of the day cannot be continuously heated, which will inevitably lead to fluctuations in room temperature and make people feel cold and uncomfortable; secondly, due to During the defrosting process, both the outdoor fan and the indoor fan are turned off. The liquid refrigerant cannot absorb heat and vaporize, and it will hit the compressor with liquid, which may cause damage to the compressor.

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