Experiment investigation of reverse cycle defrosting methods on air source heat pump with TXV as the throttle regulator

摘要: Reverse-cycle defrosting technique is one of the simplest and most widely used methods for air source heat pumps (ASHP). However, there are still some problems if thermal expansive valve (TXV) as throttle regulator in unit: process might last so long that users would feel uncomfortable due to fluctuation indoor temperature: system cannot resume heating mode smoothly after process, often breaks down triggering low-pressure switch. In this paper authors proposed these two can be greatly relieved a by-pass solenoid which TXV mode, best performance addressed energized during whole process.