Hot water heating system

Patent metadata

Field	Value
Publication number	US-2021190329-A1
Application number	US-201816756462-A
Country	US
Kind code	A1
Filing date	Oct 16, 2018
Priority date	Oct 26, 2017
Publication date	Jun 24, 2021
Grant date	—

Abstract

A hot water heating system is provided with: a hot water heating device; a heating terminal; a heat circulation circuit; a circulation means; and an expansion-absorbing means. The hot water heating device is provided with: a heating passage; a heating means for heating a heat medium inside the heating passage; a pressure detection means; a supply passage connected to the heating passage; an opening/closing means for the supply passage; and a control means which opens the opening/closing means to supply the heat medium when the internal pressure of the heating passage is less than a reference value. The control means determines that the positional relationship between the circulation means and the expansion-absorbing means is inappropriate when the pressure detected by the pressure detection means at the moment the circulation means starts to be driven is lower than the pressure detected prior to driving the circulation means.

First claim

What is claimed is:

1 . A hot water heating system, comprising a hot water heating device, a heating terminal, a heat circulation circuit connecting the hot water heating device and the heating terminal, a circulation means provided in the heat circulation circuit, and an expansion-absorbing means provided in the heat circulation circuit to absorb a volumetric expansion of a heat medium due to an increase in temperature,
wherein the hot water heating device comprises a heating passage connected to the heat circulation circuit, a heating means which heats the heat medium in the heating passage, a pressure detection means which detects an internal pressure of the heating passage, a supply passage connected to the heating passage, an opening/closing means for opening and closing the supply passage, and a control means which opens the opening/closing means to supply the heat medium when the pressure detection means detects that the internal pressure of the heating passage is less than a preset reference value, and the control means determines that a positional relationship between the circulation means and the expansion-absorbing means is inappropriate in a case where a detection pressure of the pressure detection means at the time driving of the circulation means starts is lower than a detection pressure before the driving of the circulation means.

2 . The hot water heating system according to claim 1 , wherein the hot water heating device comprises a bypass passage which branches off from the heating passage downstream of the heating means and connects to the heating passage upstream of the heating means so as to bypass the heat circulation circuit, and
the bypass passage comprises a heat exchanger for performing heat exchange between the heat medium and a hot water supply.

3 . The hot water heating system according to claim 2 , further comprising a distribution valve capable of adjusting a distribution ratio of the heat medium at a branching part of the heating passage and the bypass passage.

Assignees

• Noritz Corp

Inventors

• Morita Yasushi
• Yokoyama Takehito

Classifications

• F24D3/1066

  Distributors for heating liquids · CPC title

• F24D3/1008 Primary

  expansion tanks · CPC title

• F24D3/08

  in combination with systems for domestic hot-water supply · CPC title

• F24D3/00

  Hot-water central heating systems (district heating systems F24D10/00; central heating systems using heat accumulated in storage masses F24D11/00) · CPC title

• F24D3/10

  Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks {; Hydraulic components of a central heating system} · CPC title