Heat source device

Patent metadata

Field	Value
Publication number	US-10168694-B2
Application number	US-201715726646-A
Country	US
Kind code	B2
Filing date	Oct 6, 2017
Priority date	Nov 1, 2016
Publication date	Jan 1, 2019
Grant date	Jan 1, 2019

Abstract

Provided is a heat source device including a control unit which, in response to a predetermined request for heating, sets a switching valve to a first circulation mode to communicate first and third ports, whereas to cut off communication between second and third ports, and performs a heating operation by actuating a burner and a circulation pump. In response to a predetermined request for hot water supply, the control unit sets the switching valve to a second circulation mode to communicate second and third ports, whereas to cut off communication between first and third ports, and performs a hot water supply operation, by actuating the burner and the circulation pump. A hot water supply stop alarm unit issues a hot water supply stop alarm that urges a user to stop using hot water when the request for heating is continued for a first predetermined time or more.

First claim

What is claimed is:

1. A heat source device comprising:
a heat medium circulation passage which has a heating terminal connected thereto and through which a heat medium circulates;
a heat medium heating unit which is provided along the heat medium circulation passage and which heats a heat medium that circulates in the heat medium circulation passage;
a hot water supply bypass passage which bypasses the heat medium heating unit and which is in communication with the heat medium circulation passage;
a hot water supply passage which has an upstream end and a downstream end, the upstream end being connected to waterworks and the downstream end being connected to a hot water supply tap;
a hot water supply heat exchanger which is connected between the hot water supply bypass passage and the hot water supply passage and which heats water flowing through the hot water supply passage by heat exchange between the heat medium flowing through the hot water supply bypass passage and water flowing through the hot water supply passage;
a circulation mode switching unit which switches between a first circulation mode and a second circulation mode, the first circulation mode being a mode in which the circulation of the heat medium in the heat medium circulation passage that has passed through the hot water supply bypass passage and the heat medium heating unit is disabled, whereas the circulation of the heat medium in the heat medium circulation passage that has passed through the heat medium heating unit and the heating terminal is enabled, and the second circulation mode being a mode in which the circulation of the heat medium in the heat medium circulation passage that has passed through the heating terminal and the heat medium heating unit is disabled, whereas the circulation of the heat medium in the heat medium circulation passage that has passed through the hot water supply bypass passage and the heat medium heating unit is enabled;
a control unit which sets the first circulation mode by the circulation mode switching unit and performs a heating operation, in which the heat medium heating unit is actuated, in response to a predetermined request for heating, and which sets the second circulation mode by the circulation mode switching unit and performs a hot water supply operation, in which the heat medium heating unit is actuated, in response to a predetermined request for hot water supply; and
a hot water supply stop alarm unit which performs a hot water supply stop alarm to urge a user of hot water to stop using the hot water in a case where the request for heating is continued for a first predetermined time or more while the hot water supply operation is being performed.

2. The heat source device according to claim 1 , comprising:
a flow rate changing unit that changes a flow rate of water that flows through the hot water supply passage,
wherein the hot water supply stop alarm unit performs, as the hot water supply stop alarm, processing for decreasing a flow rate of water flowing through the hot water supply passage by the flow rate changing unit.

3. A heat source device comprising:
a heat medium circulation passage which has a heating terminal connected thereto and through which a heat medium circulates;
a heat medium heating unit which is provided along the heat medium circulation passage and which heats the heat medium that circulates in the heat medium circulation passage;
a hot water supply bypass passage which bypasses the heat medium heating unit and which is in communication with the heat medium circulation passage;
a hot water supply passage which has an upstream end and a downstream end, the upstream end being connected to waterworks and the downstream end being connected to a hot water supply tap;
a hot water supply heat exchanger which is connected between the hot water supply bypass passage and the hot water supply passage and which heats water flowing through the hot water supply passage by heat exchange between the heat medium flowing through the hot water supply bypass passage and water flowing through the hot water supply passage;
a circulation mode switching unit which changes a distribution ratio between a circulation flow rate of the heat medium in the heat medium circulation passage that has passed through the hot water supply bypass passage and the heat medium heating unit and a circulation flow rate of the heat medium in the heat medium circulation passage that has passed through the heating terminal and the heat medium heating unit;
a control unit which performs a parallel heating and hot water supply operation, in which the heat medium heating unit is actuated in a mode in which the heat medium is flown through both the hot water supply bypass passage and the heating terminal from the heat medium heating unit, the mode being set by the circulation mode switching unit, in a case where a predetermined request for heating and a predetermined request for hot water supply are both made and a first parallel operation condition is satisfied; and
a hot water supply stop alarm unit which performs a hot water supply stop alarm to urge a user of hot water to stop using the hot water in a case where a second parallel operation condition is no longer satisfied and a state in which the second parallel operation condition is not satisfied continues for a second predetermined time while the parallel heating and hot water supply operation is being performed.

4. The heat source device according to claim 3 ,
wherein the control unit controls heating power of the heat medium heating unit such that hot water of a desired hot water temperature will be supplied from the hot water supply passage in the parallel heating and hot water supply operation, and
the hot water supply stop alarm unit performs, as the hot water supply stop alarm, processing for decreasing the desired hot water temperature.

5. The heat source device according to claim 3 , comprising:
a flow rate changing unit that changes a flow rate of water that flows through the hot water supply passage,
wherein the hot water supply stop alarm unit performs, as the hot water supply stop alarm, processing for decreasing a flow rate of water flowing through the hot water supply passage by the flow rate changing unit.

Assignees

• Rinnai Kk

Inventors

• Shimada Shigeki

Classifications

• F24H1/52 Primary

  incorporating heat exchangers for domestic water (F24H1/50 takes precedence) · CPC title

• F24D2220/0235

  Three-way-valves · CPC title

• F24D3/087 Primary

  Tap water heat exchangers specially adapted therefore · CPC title

• F24H9/2007

  for water heaters · CPC title

• F24H9/1809

  for water heaters · CPC title