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Patent Searching and Data


Title:
HOT WATER HEATING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2022/123626
Kind Code:
A1
Abstract:
A hot water heating system comprises: a heat source unit; a heat medium heat exchanger that relays the supply of heat from the heat source unit to load-side equipment; a primary-side circuit having a first pump that circulates a first heat medium between the heat source unit and the heat medium heat exchanger; a secondary-side circuit having a second pump for distributing a second heat medium between the load-side equipment and the heat medium heat exchanger; a first temperature sensor that detects a primary-side fluid temperature, which is the temperature of the first heat medium flowing out from the heat source unit; a heat source unit controller; and a pump controller. The heat source unit controller: determines whether the primary-side fluid temperature is lower than a primary-side target temperature; if the primary-side fluid temperature is lower than the primary-side target temperature, determines whether the heating performance of the heat source unit is the same as an upper limit value; and if the heating performance of the heat source unit is the same as the upper limit value, transmits, to the pump controller, upper limit attainment information to the effect that the heating performance of the heat source unit has reached the upper limit value. The pump controller, upon receipt of the upper limit attainment information from the heat source unit controller, lowers the operating frequency of the second pump.

Inventors:
MATSUMOTO TAKENORI (JP)
ISHII NAOTO (JP)
MATSUGAMI TSUKINE (JP)
KADOWAKI KIMITAKA (JP)
Application Number:
PCT/JP2020/045476
Publication Date:
June 16, 2022
Filing Date:
December 07, 2020
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F24H4/02; F24D3/00; F24D3/18
Foreign References:
CN109059376A2018-12-21
JP2008082653A2008-04-10
JP2005201618A2005-07-28
JPH1019283A1998-01-23
JPS6028342U1985-02-26
JPS57134536U1982-08-21
Attorney, Agent or Firm:
KISA PATENT & TRADEMARK FIRM (JP)
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