Heating and hot water supply system

Patent metadata

Field	Value
Publication number	US-10551074-B2
Application number	US-201414338468-A
Country	US
Kind code	B2
Filing date	Jul 23, 2014
Priority date	Aug 2, 2013
Publication date	Feb 4, 2020
Grant date	Feb 4, 2020

Abstract

The system includes: a heat pump unit; a hot water supply heat exchanger; heating heat exchangers; a pump; heat medium pipes that connect a discharge side of the pump, the heat pump unit, the hot water supply heat exchanger, the heating heat exchangers, and a suction side of the pump in order; a first bypass pipe that bypasses the hot water supply heat exchanger from the heat medium pipe; a second bypass pipe that bypasses the heating heat exchangers from the heat medium pipe; a four-way valve that regulates flow distribution of the heat medium between the hot water supply heat exchanger and the first bypass pipe 22 , and between the heating heat exchangers and the second bypass pipe; and a control unit for controlling the four-way valve in accordance with a hot water supply request and a heating request.

First claim

The invention claimed is:

1. A heating and hot water supply system comprising:
a heater configured to heat a heat medium;
a hot water supply heat exchanger that performs heat exchange between the heat medium and water;
a hot water storage tank that stores water heated by the hot water supply heat exchanger;
a heating heat exchanger that heats an inside of a room using the heat medium;
a heat medium pump that feeds the heat medium;
a circulation pipe that annularly connects a discharge side of the heat medium pump, the heater, the hot water supply heat exchanger, the heating heat exchanger, and a suction side of the heat medium pump in order;
a first bypass pipe that bypasses the hot water supply heat exchanger from the circulation pipe;
a second bypass pipe that bypasses the heating heat exchanger from the circulation pipe;
a first flow regulator that is provided at a junction between the circulation pipe and the first bypass pipe, and is configured to regulate a first ratio between a flow rate of the heat medium flowing into the hot water supply heat exchanger and a flow rate of the heat medium flowing into the first bypass pipe, such that the first ratio may vary between more than two values between 0% and 100%;
a second flow regulator that is provided at a junction between the circulation pipe and the second bypass pipe, and is configured to regulate a second ratio between a flow rate of the heat medium flowing into the heating heat exchanger and a flow rate of the heat medium flowing into the second bypass pipe, such that the second ratio may vary between more than two values between 0% and 100%; and
a controller configured to control the first flow regulator and the second flow regulator in accordance with degrees of a hot water supply request for heat exchange by the hot water supply heat exchanger and a heating request for heat exchange by the heating heat exchanger, wherein
the circulation pipe conveys the heat medium from the discharge side of the heat medium pump, through the heater, through the hot water supply heat exchanger, through the heating heat exchanger, and to the suction side of the heat medium pump, and
the heating heat exchanger performs heat exchange between the heat medium provided along the circulation pump and indoor air to heat the inside of the room and reduce the temperature of the heat medium.

2. The heating and hot water supply system according to claim 1 , further comprising
an inflow temperature detector for detecting an inflow temperature of the heat medium flowing into the heating heat exchanger,
wherein the controller controls the first flow regulator so that the inflow temperature is an inflow temperature target value determined by the heating request.

3. The heating and hot water supply system according to claim 1 , further comprising
an outflow temperature detector for detecting an outflow temperature of the heat medium flowing out of the heating heat exchanger,
wherein the controller controls the second flow regulator so that the outflow temperature is an outflow temperature target value determined by the heating request.

4. The heating and hot water supply system according to claim 1 , further comprising:
a third bypass pipe that connects a portion between the second flow regulator and the heating heat exchanger in the circulation pipe and a discharge side of the heat medium pump in the circulation pipe;
a third flow regulator provided in a middle of the third bypass pipe; and
a second controller configured to regulate an opening degree of the third flow regulator in accordance with a ratio regulated by the second flow regulator.

5. The heating and hot water supply system according to claim 1 , wherein the heater is a refrigerant-water heat exchanger.

Assignees

• Mitsubishi Electric Corp

Inventors

• Minamisako Hirokazu

Classifications

• F24D3/082

  Hot water storage tanks specially adapted therefor · CPC title

• Y02B30/12

  Hot water central heating systems using heat pumps · CPC title

• F24D3/105

  pumps combined with multiple way valves · CPC title

• F24D2220/0242

  Multiple way valves · CPC title

• F24D3/18

  using heat pumps · CPC title