Fixed-frequency one-to-two air-conditioning unit

Abstract

The invention discloses a fixed-frequency one-to-two air-conditioning unit, which is equipped with two fixed-frequency compressors and a fan (10) inside the external unit; the live wire end (8) of the first fixed-frequency compressor (7) is The second normally closed contact (5) and the first coil (1) are connected with the neutral terminal (9) of itself; the second normally closed contact (5) is connected to the fan ( 10) connection, the blower fan (10) is connected with the neutral terminal (9) of the first fixed-frequency compressor (7) through another first normally open contact (3); the live wire of the second fixed-frequency compressor (11) End (8) is connected with its own neutral terminal (9) through the first normally closed contact (2) and the second coil (4); the first normally closed contact (2) is connected through a second normally open contact ( 6) Connect to the fan (10), and the fan (10) is connected to the neutral terminal (9) of the second fixed-frequency compressor (11) through another second normally open contact (6). The unit can realize the interlocking of two compressors.

Description

technical field [0001] The invention relates to the field of air conditioning, in particular to a fixed-frequency one-to-two air-conditioning unit. Background technique [0002] A common fixed frequency air conditioner is an external unit and an internal unit, and the external unit is provided with a compressor and a fan. In this way, if you want to drive two internal units, you generally need two external units. However, the current domestic air-conditioning industry is increasingly fierce in price competition, and the cost control has even reached the level of penny-pinching. Therefore, in order to control the cost, some people naturally put forward the idea of ​​using one external machine to drive two internal machines. The external machine is equipped with two fixed-frequency compressors, a heat exchanger and a fan. The two compressors are controlled by The two internal units are powered separately, and the two compressors share the heat exchanger and fan, so as to red...

AI Technical Summary

Problems solved by technology

[0003] However, there is a key technical problem in the above assumption, that is, how to realize the control and interlocking of the circuits of the two compressors of the external unit, because when the traditional control method turns on any one of the internal units and supplies power to the corresponding compressor, the compressor Both the compressor and the fan can operate normally, but if the two internal units are turned on at the same time, when the power is supplied to the two compressors, the zero live wire of the fan will be short-circuited and the machine will be shut down

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