초록 ▼

A hot-water supply system heats water through heat exchange between high-temperature refrigerant of a heat pump circuit and water of a water circulating circuit. The system is an instantaneous water heater unit for instantaneously heating, at a water heat exchanger, water supplied through a water su

A hot-water supply system heats water through heat exchange between high-temperature refrigerant of a heat pump circuit and water of a water circulating circuit. The system is an instantaneous water heater unit for instantaneously heating, at a water heat exchanger, water supplied through a water supply pipe and supplying hot water to a using end unit. Therefore, a large-capacity hot-water storage tank is not needed. Sufficient heat of condensation to heat water can not be produced, because pressure conditions of the heat pump circuit is not stabilized just after the start of operation. Therefore, during a short period of rising time, hot water stored in a hot-water supply tank and water from the water heat exchanger are mixed and the mixture is supplied to keep the hot water at a preset temperature. Therefore, it is possible to use a smaller hot-water supply tank.

대표청구항 ▼

1. A heat pump hot-water supply system, comprising:a compressor, a first heat exchanger for heat-exchange between a refrigerant discharged from the compressor and water, a pressure reducing unit for reducing the pressure of the refrigerant from the first heat exchanger, a second heat exchanger locat

1. A heat pump hot-water supply system, comprising:a compressor, a first heat exchanger for heat-exchange between a refrigerant discharged from the compressor and water, a pressure reducing unit for reducing the pressure of the refrigerant from the first heat exchanger, a second heat exchanger located between the pressure reducing unit and the compressor, and a hot-water supply tank for holding water heated by the first heat exchanger; the heat pump hot-water supply system further comprising: an additional heating tank route followed by water, which is kept in the hot-water supply tank, back to the hot-water supply tank via the first heat exchanger, a hot-water supply tank route supplying hot water, which is kept in the hot-water supply tank, to a using end unit, and a direct hot-water supply route supplying directly water from a water supply pipe to a using end unit via the first heat exchanger; the heat pump hot-water supply system having an operation mode switch function supplying hot water through the hot-water supply tank route right after use of hot water is started at the using end unit and then supplying hot water through only the direct hot-water supply route. 2. A heat pump hot-water supply system, comprising:a compressor, a first heat exchanger for heat-exchange between a refrigerant discharged from the compressor and water, a pressure reducing unit for reducing the pressure of the refrigerant from the first heat exchanger, a second heat exchanger located between the pressure reducing unit and the compressor, and a hot-water supply tank for holding water heated by the first heat exchanger; the heat pump hot-water supply system further comprising: an additional heating tank route followed by water, which is kept in the hot-water supply tank, back to the hot-water supply tank via the first heat exchanger, a hot-water supply tank route supplying hot water, which is kept in the hot-water supply tank, to a using end unit, and a direct hot-water supply route supplying directly water from a water supply pipe to a using end unit via the first heat exchanger; the heat pump hot-water supply system having an operation mode mixing water in the hot-water supply tank route with water in the direct hot-water supply route and supplying the mixture to the using end unit. 3. A heat pump hot-water supply system, comprising:a compressor, a first heat exchanger for heat-exchange between a refrigerant discharged from the compressor and water, a pressure reducing unit for reducing the pressure of the refrigerant from the first heat exchanger, a second heat exchanger located between the pressure reducing unit and the compressor, and a hot-water supply tank for holding water heated by the first heat exchanger; the heat pump hot-water supply system further comprising; an additional heating tank route followed by water, which is kept in the hot-water supply tank, back to the hot-water supply tank via the first heat exchanger, a hot-water supply tank route supplying hot water, which is kept in the hot-water supply tank, to a using end unit, and a direct hot-water supply route supplying directly water from a water supply pipe to a using end unit via the first heat exchanger; the heat pump hot-water supply system having an operation mode switch function switching two operation modes of the hot-water supply tank route and the direct hot-water supply route; the heat pump hot-water supply system having an operation mode mixing hot water in the hot-water supply tank route or the direct hot-water supply route with cool water from the water supply pipe and supplying the mixture to the using end unit. 4. A heat pump hot-water supply system, comprising:a compressor, a first heat exchanger for heat-exchange between a refrigerant discharged from the compressor and water, a pressure reducing unit for reducing the pressure of the refrigerant from the first heat exchanger, a second heat exchanger located between the pressure reducing unit and the compressor, and a hot-water supply tank for holding water heated by the first heat exchanger; the heat pump hot-water supply system further comprising: an additional heating tank route followed by water, which is kept in the hot-water supply tank, back to the hot-water supply tank via the first heat exchanger, a hot-water supply tank route supplying hot water, which is kept in the hot-water supply tank, to a using end unit, and a direct hot-water supply route supplying directly water from a water supply pipe to a using end unit via the first heat exchanger; the heat pump hot-water supply system having an operation mode switch function switching two operation modes of the hot-water supply tank route and the direct hot-water supply route; the heat pump hot-water supply system mixing hot water in the hot-water supply tank route with hot water in the direct hot-water supply route and then mixing this mixture with cool water from the water supply pipe and then supplying this mixture to the using end unit.