| 摘要 |
<p>PURPOSE: A heat pump is provided to simultaneously perform defrosting and heating functions by alternately using multiple heat exchangers as a condenser. CONSTITUTION: A heat pump comprises a compressor (211), an indoor heat exchanger, an outdoor heat exchanger (213), an expansion valve (214), a four-way valve (215), an accumulator (216), a bypass valve (217), a first three-way valve (218), and a second three-way valve (219). The compressor compresses a refrigerant discharged from the accumulator and discharges the compressed refrigerant to the outside. The outdoor heat exchanger comprises first and second heat exchangers. The indoor heat exchanger is operated as an evaporator or a condenser. The expansion valve decreases the temperature and pressure of the refrigerant. The four-way valve controls the circulation direction of the refrigerant. The bypass valve controls the amount of the bypassed refrigerant. The first and second three-way valves have first, second, and third sides.</p> |
