Air conditioner

Abstract

The embodiment of the invention provides an air conditioner for achieving defrosting without the reversing of a four-way valve required. According to the technical scheme of the air conditioner provided by the embodiment of the invention, the air conditioner comprises a compressor, a four-way valve, an outdoor heat exchanger, a first throttling device, an indoor front heat exchanger, a second throttling device and an indoor rear heat exchanger which are in pipeline connection with one another sequentially; the air conditioner further comprises a defrosting solenoid valve; one end of the defrosting solenoid valve is in pipeline connection with the compressor; and the other end of the defrosting solenoid valve is in pipeline connection with the outdoor heat exchanger.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of air conditioning, and in particular to an air conditioner. Background technique [0002] During heating operation in winter, due to the low outdoor ambient temperature, the surface of the outdoor heat exchanger is often below 0°C, so the surface will gradually frost, and the heating capacity of the unit will gradually decrease as the frost thickens. , the temperature of the indoor air outlet gradually decreases, and at this time, defrosting is required. [0003] Traditional household air conditioners or most fluorine system central air conditioner manufacturers use reverse cycle defrosting with four-way reversing valve, that is, defrosting operation is equivalent to cooling operation, and has the following disadvantages: At this time, the indoor unit performs anti-cold wind processing, stop heating, affecting comfort, the heat exchanger of the indoor unit acts as an evaporator to di...

AI Technical Summary

Problems solved by technology

[0003] Traditional household air conditioners or most fluorine system central air conditioner manufacturers use reverse cycle defrosting with four-way reversing valve, that is, defrosting operation is equivalent to cooling operation, and has the following disadvantages: At this time, the indoor unit performs anti-cold wind processing, stop heating, affecting comfort, the heat exchanger of the indoor unit acts as an evaporator to dissipate cooling indoors, and the temperature of the room drops; in addition, since most manufacturers adopt the simultaneous defrosting setting, that is, when the When a module needs to be defrosted, all modules will enter the defrosting operation, so that some operating modules are forced to enter the defrosting operation even if they do not need defrosting, which is not economical

[0004] Since the reverse cycle defrosting is realized by switching the four-way valve, the high and low pressure of the unit will have a sudden change process, which will have a large impact on the system and easily lead to protection of the unit; The reliability of the valve has higher requirements

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