Global Patent Index - EP 3754284 A1

EP 3754284 A1 20201223 - HEAT EXCHANGER AND REFRIGERATION CYCLE DEVICE

Title (en)

HEAT EXCHANGER AND REFRIGERATION CYCLE DEVICE

Title (de)

WÄRMETAUSCHER UND KÜHLZYKLUSVORRICHTUNG

Title (fr)

ÉCHANGEUR DE CHALEUR ET DISPOSITIF DE CYCLE DE RÉFRIGÉRATION

Publication

EP 3754284 A1 20201223 (EN)

Application

EP 20158255 A 20200219

Priority

JP 2019101916 A 20190531

Abstract (en)

The present invention provides a heat exchanger (32) including: an inner pipe (1); an insertion body (2) inserted into the inner pipe (1); and at least one or more outer pipes (3) provided around an outer periphery of the inner pipe (1) and through which second fluid flows, wherein the insertion body (2) is formed from a shaft (21) and a projection (22) formed on an outer surface of the shaft (21), first fluid flows through a spiral flow path (23) formed from at least an inner surface of the inner pipe (1) and the projection (22), and a plurality of thickness projections (22b) are provided on the spiral flow path (23) at predetermined intervals in a flowing direction of the first fluid, and a flow path area of the spiral flow path (23) is made small at the predetermined intervals in the flowing direction of the first fluid by each of the thickness projections (22b). According to this, the heat exchanger (32) can suppress the local precipitation of scale by simple means and heat exchanging efficiency can be enhanced.

IPC 8 full level

F28F 19/00 (2006.01); F28D 7/02 (2006.01); F28D 7/04 (2006.01); F28D 7/10 (2006.01); F28F 1/08 (2006.01)

CPC (source: EP)

F25B 39/04 (2013.01); F28D 7/0016 (2013.01); F28D 7/022 (2013.01); F28D 7/04 (2013.01); F28D 7/106 (2013.01); F28F 1/08 (2013.01); F28F 1/36 (2013.01); F28F 13/12 (2013.01); F28F 13/187 (2013.01); F28F 19/00 (2013.01); F25B 2339/047 (2013.01); F28D 2021/007 (2013.01)

Citation (applicant)

WO 2017158938 A1 20170921 - MITSUBISHI ELECTRIC CORP [JP]

Citation (search report)

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

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

EP 3754284 A1 20201223; EP 3754284 B1 20220323; JP 2020197311 A 20201210; JP 7129602 B2 20220902

DOCDB simple family (application)

EP 20158255 A 20200219; JP 2019101916 A 20190531