Defrosting method for thermal pump air conditioner and air conditioner

Abstract

The invention discloses a defrosting method of a heat pump air conditioner. The method comprises the following steps: adopting bypass tube bypass compressor containing a bypass solenoid valve and a front tube bank of an outdoor heat exchanger, and connecting the solenoid valve and a capillary tube between the front tube bank of the outdoor heat exchanger and a rear tube bank of the outdoor heat exchanger in parallel; the defrosting process comprises the following steps: closing the solenoid valve; opening the bypass solenoid valve; and causing the refrigerant to sequentially flow through the compressor, a four-way reversing valve, the bypass solenoid valve, the front tube bank of the outdoor heat exchanger, the capillary tube and the rear tube bank of the outdoor heat exchanger, and then flow through the four-way reversing valve and return to the compressor; during the flow process, taking the front tube bank of the outdoor heat exchanger as a condenser and the rear tube bank of the outdoor heat exchanger as an evaporator, and melting a frost layer on the surface of the front tube bank of the outdoor heat exchanger; and / or changing the conducting direction of the reversing valve to melt the frost layer on the surface of the rear tube bank of the outdoor heat exchanger. The invention also provides the heat pump air conditioner. The method can efficiently, quickly and safely remove the frost layer on the surface of the outdoor heat exchanger.

Description

technical field

[0001] The invention relates to defrosting of an air conditioner, in particular to a defrosting method of a heat pump air conditioner and the air conditioner. Background technique

[0002] At present, the defrosting of air conditioners mainly adopts reverse cycle defrosting and hot gas bypass defrosting methods. Reverse cycle defrosting is to convert the system into a cooling state. The outdoor heat exchanger acts as a condenser, and the high-temperature and high-pressure refrigerant condenses and releases heat to melt the frost layer. However, during this process, the indoor heat exchanger acts as an evaporator, which will Heat absorption affects comfort, and there are problems of insufficient defrosting ability and slow speed.

[0003] The hot gas bypass defrosting method short-circuits the evaporator, and the high-temperature and high-pressure gaseous refrigerant discharged from the compressor directly enters the outdoor heat exchanger for defrosting. Dur...

Examples

Embodiment Construction

[0018] In order to clearly illustrate the solutions in the present invention, preferred embodiments are given below and detailed descriptions are given in conjunction with the accompanying drawings.

[0019] see figure 1 , in the air conditioner of the present invention, the compressor 1 and the outdoor heat exchanger constitute a cycle without passing through the indoor heat exchanger 3, the process is short and the cycle speed is fast, and the front row pipe 5 and the rear row pipe 6 of the outdoor heat exchanger are respectively removed According to different frosting conditions, the defrosting time is determined, the defrosting speed is fast and energy saving, and half of the outdoor heat exchanger is used as an evaporator during defrosting, and continues to absorb outdoor heat, so as to achieve the purpose of fast and effective defrosting. The system includes: an indoor heat exchanger 3, a main capillary tube 4, a compressor 1, a front tube 5 and a rear tube 6 of an outdo...

technical field

[0001] The invention relates to defrosting of an air conditioner, in particular to a defrosting method of a heat pump air conditioner and the air conditioner. Background technique

[0002] At present, the defrosting of air conditioners mainly adopts reverse cycle defrosting and hot gas bypass defrosting methods. Reverse cycle defrosting is to convert the system into a cooling state. The outdoor heat exchanger acts as a condenser, and the high-temperature and high-pressure refrigerant condenses and releases heat to melt the frost layer. However, during this process, the indoor heat exchanger acts as an evaporator, which will Heat absorption affects comfort, and there are problems of insufficient defrosting ability and slow speed.

[0003] The hot gas bypass defrosting method short-circuits the evaporator, and the high-temperature and high-pressure gaseous refrigerant discharged from the compressor directly enters the outdoor heat exchanger for defrosting. Dur...

Examples

Embodiment Construction

[0018] In order to clearly illustrate the solutions in the present invention, preferred embodiments are given below and detailed descriptions are given in conjunction with the accompanying drawings.

[0019] see figure 1 , in the air conditioner of the present invention, the compressor 1 and the outdoor heat exchanger constitute a cycle without passing through the indoor heat exchanger 3, the process is short and the cycle speed is fast, and the front row pipe 5 and the rear row pipe 6 of the outdoor heat exchanger are respectively removed According to different frosting conditions, the defrosting time is determined, the defrosting speed is fast and energy saving, and half of the outdoor heat exchanger is used as an evaporator during defrosting, and continues to absorb outdoor heat, so as to achieve the purpose of fast and effective defrosting. The system includes: an indoor heat exchanger 3, a main capillary tube 4, a compressor 1, a front tube 5 and a rear tube 6 of an outdo...

Images