Hot water supply apparatus associated with heat pump

Patent metadata

Field	Value
Publication number	US-9347683-B2
Application number	US-201414329133-A
Country	US
Kind code	B2
Filing date	Jul 11, 2014
Priority date	May 20, 2010
Publication date	May 24, 2016
Grant date	May 24, 2016

Abstract

A hot water supply apparatus associated with a heat pump is provided. The hot water supply apparatus performs a hot water supply operation using a high temperature refrigerant that has been discharged from a compressor, and simultaneously performs an indoor heating operation using a two-stage refrigerant cycle. This allows the apparatus to supply hot water while simultaneously providing heating/cooling to an indoor space.

First claim

What is claimed is:

1. A hot water supply apparatus associated with a heat pump, comprising:
a first refrigerant circuit that circulates a first refrigerant, comprising a first compressor that compresses the first refrigerant, a hot water supply heat exchanger that is disposed in a water supply storage device to store water being heated, and a first refrigerant pipe connecting the first compressor and the hot water supply heat exchanger to guide a flow of the first refrigerant and a first flow switch part installed at the first refrigerant pipe;
a second refrigerant circuit that circulates a second refrigerant, comprising a second compressor that compresses the second refrigerant, a water-refrigerant heat exchanger that performs heat exchange between the second refrigerant discharged from the second compressor and water and and a second refrigerant pipe connecting the second compressor and the water-refrigerant heat exchanger to guide a flow of the second refrigerant;
a cascade heat exchanger operably coupled to each of the first and second refrigerant circuits so as to perform heat exchange between the first and second refrigerants; and
an indoor heat exchanger that receives the water from the water-refrigerant heat exchanger so as to perform at least one of the heating or cooling operation,
wherein the first refrigerant pipe comprises:
a first pipe extended from an outlet of the compressor to the hot water supply heat exchanger, the first pipe to allow refrigerant discharged from the first compressor to flow into the hot water supply heat exchanger,
a second pipe extended from the hot water supply heat exchanger to the first flow switch part, the second pipe to allow refrigerant passing through the hot water supply heat exchanger to flow into the first flow switch part, and
a bypass pipe extended from the a first spot of the first pipe to a first spot of the second pipe, the bypass pipe to allow refrigerant discharged from the first compressor to flow into the first flow switch part,
wherein the hot water supply apparatus further comprises a first hot water supply flow adjustment part installed at the first spot of the first pipe to allow refrigerant discharged from the first compressor:
to flow into the hot water supply heat exchanger via the first pipe in a first operation mode, and
to flow into the first flow switch part via the bypass pipe in a second operation mode.

2. The hot water supply apparatus of claim 1 , further comprising:
a water pipe in which the water that has undergone heat exchange with the second refrigerant in the water-refrigerant heat exchanger is circulated; and
a pump for forcibly circulating the water within the water pipe.

3. The hot water supply apparatus of claim 1 , wherein the indoor heat exchanger comprises an air-conditioning heat exchanger for exchanging heat between indoor air and the water, or
a floor heat exchanger for exchanging heat between a bottom surface of the indoor space and the water.

4. The hot water supply apparatus of claim 1 , wherein the water-refrigerant heat exchanger is a heating condenser in which the second refrigerant heats the water for heating and is condensed.

5. The hot water supply apparatus of claim 1 , further comprising:
a second flow switch that selectively switches a flow direction of the second refrigerant passing through the second compressor toward one of the water-refrigerant heat exchanger or the cascade heat exchanger.

6. The hot water supply apparatus of claim 5 , further comprising an auxiliary hot water supply pipe that connects the first refrigerant circuit to the second refrigerant circuit.

7. The hot water supply apparatus of claim 6 , wherein the auxiliary hot water supply pipe comprises:
a first auxiliary hot water supply pipe extended from a second spot of the first pipe to an outlet of the second compressor.

8. The hot water supply apparatus of claim 7 , wherein the auxiliary hot water supply pipe comprises:
a second auxiliary hot water supply pipe extended from a second spot of the second pipe to the second flow switch.

9. The hot water supply apparatus of claim 7 , further comprising:
a second hot water supply flow adjustment device installed at the first auxiliary hot water supply pipe to adjust an amount of the second refrigerant discharged from the second compressor and introduced into the hot water supply heat exchanger through the first auxiliary hot water supply pipe and an amount of the second refrigerant directly introduced into the second flow switch.

10. The hot water supply apparatus of claim 8 , further comprising:
a third hot water supply flow adjustment device installed at the second spot of the first pipe; and
a fourth hot water supply flow adjustment device installed at the second spot of the second pipe.

11. The hot water supply apparatus of claim 1 , further comprising:
a bypass water pipe that bypasses the water passing through the indoor heat exchanger into the cascade heat exchanger during the defrosting operation.

12. The hot water supply apparatus of claim 11 , wherein the bypass water pipe is branched at a first portion of a water pipe between an indoor heat exchanger and the water-refrigerant heat exchanger and rejoins at the second portion of the water pipe corresponding to a discharge side of the water refrigerant heat exchanger.

13. The hot water supply apparatus of claim 1 , further comprising an outdoor heat exchanger in which the first refrigerant is heat-exchanged with an outdoor air,
wherein the first flow switch selectively switches a flow direction of the first refrigerant passing through the hot water supply heat exchanger into the cascade heat exchanger or the outdoor heat exchanger.

Assignees

• Lg Electronics Inc

Inventors

• Sim Jieseop

Classifications

• F24D11/0214 Primary

  water heating system · CPC title

• F24H4/02 Primary

  Water heaters · CPC title

• F24D17/02

  using heat pumps · CPC title

• Y02B30/126

  Cross-Sectional Technologies · mapped topic

• Y02B30/12

  Hot water central heating systems using heat pumps · CPC title