The invention provides a non-intermittent phase-change heat storage
defrosting system, which relates to an
energy storage defrosting system. The
defrosting system aims at solving the problems that an air source hot pump defrosting method has the poor stability and reliability of
machine units and the rooms become less comfortable after
heat supply is stopped. The defrosting system of the invention is characterized in that an indoor
machine is connected with a first pipeline and a second pipeline; an outdoor
machine is connected with a second pipeline and a third pipeline; the third pipeline is respectively connected with the indoor pipeline and the outdoor pipeline; a fourth pipeline and a fifth pipeline are respectively connected with the
fist pipeline and the third pipeline; a compressor is connected with a gas-liquid separator; a four-way
directional valve is respectively connected with the first and the fifth pipelines, the gas-liquid separator and the compressor; the phase-change heat storage device is connected with the fifth and the fourth pipelines through a sixth pipeline and a seventh pipeline; an eighth pipeline is respectively connected with the fifth and seventh pipelines; a first valve, a second valve, a third valve, a fourth valve, a fifth valve, a sixth valve, a seventh valve, an eighth valve and a ninth valve are respectively arranged on the fifth pipeline, the sixth pipeline, the seventh pipeline, the eighth pipeline, the first pipeline, the second pipeline, the third pipeline, the fourth pipeline and the first pipeline; a capillary
pipe is arranged on the fourth pipeline. The defrosting system of the invention has good stability and reliability, high defrosting speed, and high comfort level of the room after the
heat supply is stopped.