Transcritical heat pump water heater with a water drain

摘要

Apparatus for heating the water of the cooling cycle to heat the water using the gas cooler is provided. If the system is stopped, the drain port to be drained to the outside all the water in the water supply system is built into the water supply system. In a preferred embodiment, the water outlet of the gas cooler, in the lowest part in the vertical direction of the water supply system. As drainage is facilitated, the drainage valve is disposed in the lowest area in the vertical direction.