# US 11,029,039 B2 · Heating and hot water supplying device

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 11,029,039 B2
- Document ID: US11029039B2
- Status: Granted
- Kind: B2
- Application number: 16/349,278
- Filed: 2017-10-26
- Published: 2019-11-14
- Granted: 2021-06-08
- Earliest claimed: 2016-11-25
- Assignees: Noritz Corporation
- Applicants: Noritz Corporation
- Inventors: Yasushi Morita; Yoshihisa Kitano; Yasutaka Kuriyama; Hiroshi Morimoto; Midori Yokoyama; Haruhiko Tamada
- Web page: https://patentgrep.com/patent/US11029039B2

## CPC

- F24D 3/08: in combination with systems for domestic hot-water supply
- F24D 3/00: Hot-water central heating systems (district heating systems F24D10/00; central heating systems using heat accumulated in storage masses F24D11/00)
- F24D 19/1015: {using a valve or valves}
- F24D 19/1069: {regulation in function of the temperature of the domestic hot water}
- F24H 1/48: Water heaters for central heating incorporating heaters for domestic water
- F24H 1/52: incorporating heat exchangers for domestic water (F24H1/50 takes precedence)
- F24H 9/2035: {using fluid fuel}
- F24H 15/176: Improving or maintaining comfort of users
- F24H 15/258: Outdoor temperature
- F24H 15/31: of valves having only one inlet port and one outlet port, e.g. flow rate regulating valves
- F24H 15/335: Control of pumps, e.g. on-off control (control of compressors of heat pumps F24H15/38)
- F24D 2220/042: Temperature sensors
- F24H 15/281: Input from user
- F24H 15/395: Information to users, e.g. alarms
- F24D: DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR (using steam or condensate extracted or exhausted from steam engine plants for heating purposes F01K17/02)
- F24H: FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL (steam generation F22)

## Abstract

A heating and hot water supplying device includes: a circulation passage that connects a heat exchanger and an external heating terminal; a bypass passage that bypasses the heating terminal by branching from the circulation passage; a hot water supply passage for supplying the hot water heated to a preset hot water supply temperature by the heat exchanger for hot water supply; a control unit that controls operations in which this plurality of units are used; and an operation terminal for performing various operations. A distribution valve is provided in the branching portion of the bypass passage. The distribution valve adjusts the distribution ratio so that each of a heating operation, a hot water supplying operation, and a simultaneous heating and hot water supplying operation is possible. The operation terminal is provided with a prohibit switch to prohibit the simultaneous heating and hot water supplying operation.

## Claims

### Claim 1

A heating and hot water supplying device comprising:
a combustion means;
a heat exchanger;
a circulation passage which connects the heat exchanger with an external heating terminal;
a circulation pump which is provided in the circulation passage;
a bypass passage which branches from the circulation passage and bypasses the heating terminal;
a heat exchanger for hot water supply which is provided in the bypass passage;
a water supply passage which supplies tap water to the heat exchanger for hot water supply;
a hot water supply passage which supplies hot water heated by the heat exchanger for hot water supply at a preset hot water supply temperature;
a control unit which controls operations comprising a heating operation and a hot water supplying operation;
an operation terminal which is connected with the control unit to be able to communicate with the control unit and performs various operations; and
an external air temperature sensor which detects an external air temperature,
wherein a distribution valve is provided in a branching portion of the bypass passage, the distribution valve is able to adjust a distribution ratio so that each of the heating operation, the hot water supplying operation, and a simultaneous heating and hot water supplying operation is possible, and a prohibit switch which prohibits the simultaneous heating and hot water supplying operation is provided at the operation terminal, and
wherein when the external air temperature detected by the external air temperature sensor is equal to or higher than a predetermined reference temperature, an operation of the prohibit switch is invalidated.

### Claim 2 (depends on 1)

The heating and hot water supplying device according to claim 1, wherein, when it is determined that a heating capacity for performing the simultaneous heating and hot water supplying operation is insufficient while the simultaneous heating and hot water supplying operation is performed, a notification which prompts the operation of the prohibit switch is performed.

### Claim 3 (depends on 2)

The heating and hot water supplying device according to claim 2, wherein the hot water supplying operation is prioritized over the heating operation in a state in which the simultaneous heating and hot water supplying operation is prohibited by the operation of the prohibit switch.

### Claim 4 (depends on 1)

The heating and hot water supplying device according to claim 1, wherein the hot water supplying operation is prioritized over the heating operation in a state in which the simultaneous heating and hot water supplying operation is prohibited by the operation of the prohibit switch.