Global Patent Index - EP 2623898 A1

EP 2623898 A1 20130807 - HOT WATER SUPPLY SYSTEM

Title (en)

HOT WATER SUPPLY SYSTEM

Title (de)

HEISSWASSERVERSORGUNGSSYSTEM

Title (fr)

SYSTÈME D'ALIMENTATION EN EAU CHAUDE

Publication

EP 2623898 A1 20130807 (EN)

Application

EP 11828854 A 20110920

Priority

  • JP 2010215911 A 20100927
  • JP 2011071326 W 20110920

Abstract (en)

A cascade refrigeration cycle is constituted of a low-temperature refrigeration cycle (Rb) that needs a four-way valve (11) and a high-temperature refrigeration cycle (Ra) that does not need the four-way valve (11) and an intermediate heat exchanger (5) included in each refrigeration cycle is caused to exchange heat. A hot water pipe (H) communicates with a water heat exchanger (2) in the high-temperature refrigeration cycle (Ra) and water or hot water is exchanged for high-temperature hot water, which is supplied to the side of use. A bypass circuit (B) has one end connected to a refrigerant pipe (P) between a high-temperature compressor (1) and the water heat exchanger in the high-temperature refrigeration cycle, has the other end connected to the refrigerant pipe between a high-temperature expansion device (4) and the intermediate heat exchanger, and has a fluid-controlled valve (8) provided in an intermediate portion. A controller (S) exercises specific control during defrosting operation for an evaporator in the low-temperature refrigeration cycle (Rb) by controlling the fluid-controlled valve (8) to open and the high-temperature expansion device to close during defrosting operation of an aero-thermal exchanger (12) in the low-temperature refrigeration cycle (Rb) to enable reductions of parts costs and an efficient defrosting operation.

IPC 8 full level

F25B 47/02 (2006.01); F24H 1/00 (2006.01); F25B 7/00 (2006.01)

CPC (source: EP KR)

F24D 17/02 (2013.01 - EP); F24D 19/1054 (2013.01 - EP); F24H 4/02 (2013.01 - KR); F25B 7/00 (2013.01 - EP KR); F25B 13/00 (2013.01 - EP); F25B 47/02 (2013.01 - KR); F25B 47/025 (2013.01 - EP); F25B 49/02 (2013.01 - EP KR); F25B 2313/02741 (2013.01 - EP); F25B 2339/047 (2013.01 - EP); F25B 2400/0403 (2013.01 - EP); F25B 2400/0411 (2013.01 - EP); F25B 2600/2501 (2013.01 - EP); F25B 2600/2513 (2013.01 - EP)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DOCDB simple family (publication)

EP 2623898 A1 20130807; EP 2623898 A4 20180117; CN 102884384 A 20130116; JP WO2012043297 A1 20140206; KR 20130006495 A 20130116; WO 2012043297 A1 20120405

DOCDB simple family (application)

EP 11828854 A 20110920; CN 201180022981 A 20110920; JP 2011071326 W 20110920; JP 2012536353 A 20110920; KR 20127028591 A 20110920