Heat pump type hot-water heating apparatus

Abstract

PROBLEM TO BE SOLVED: To improve heating property at starting operation by giving priority to a heating side in distributing compressor capability at the beginning of starting hot water storing operation and heating operation at the same time while sorting refrigerant into both a hot water storage water refrigerant heat exchanger and a heating side water refrigerant heat exchanger.SOLUTION: This heat pump hot water supply heating device comprises a hot water storage side heat pump refrigerant circuit TR, a heating side heat pump refrigerant circuit DR, a hot water storage circuit C2 for circulating hot water in a hot water storage tank 31 for boiling-up, a heating circuit C1 for circulating heating hot water into a heating terminal for heating operation, and a control device S1 for controlling the openings of a hot water storage side flow control valve 27 and a heating side flow control valve 26 to sort the flow of the refrigerant from a compressor into the hot water storage heat pump refrigerant circuit and the heating side heat pump refrigerant circuit. The control device makes the opening of the heating side flow control valve in the heating side heat pump refrigerant circuit greater than the opening of the hot water storage side flow control valve in the hot water storage side heat pump refrigerant circuit at the beginning of starting hot water storing operation and heating operation at the same time.

Description

technical field [0001] The present invention relates to a heat pump water heater using carbon dioxide as a refrigerant, and particularly relates to distributing refrigerant discharged from a compressor to a heat pump refrigerant circuit on the hot water storage side and a heat pump refrigerant circuit on the heating side during simultaneous operation of the hot water storage operation and the heating operation Flow heat pump plumbing. Background technique [0002] It is known that in a heat pump water heating device using carbon dioxide as a refrigerant, both the water-refrigerant heat exchanger on the hot water storage side and the water-refrigerant heat exchanger on the heating side are assembled into the refrigerant circuit of the heat pump unit to make the hot water storage tank Hot water storage operation in which stored hot water boils, and heating operation in which heated warm water is circulated and supplied to heating terminals such as floor radiators to provide he...

AI Technical Summary

Problems solved by technology

[0004] However, in the heat pump water heater of Patent Document 1, both the water storage-side water-refrigerant heat exchanger and the heating-side water-refrigerant heat exchanger are installed in series in the heat pump refrigerant circuit. In hot water operation and heating operation, and in simultaneous operation of hot water storage operation and heating operation, the compressor capacity cannot be allocated to the hot water storage side water-refrigerant heat exchanger and the heating side water-refrigerant heat exchanger in an adjustable manner.

Images