Title:
DOUBLE-TUBE HEAT EXCHANGER
Document Type and Number:
Japanese Patent JP2016138687
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a double-tube heat exchanger in which an overall heat transfer coefficient K between a first heat transfer tube and a second heat transfer tube can be increased.SOLUTION: The double-tube heat exchanger comprising a first heat transfer tube 15-1 acting as a flow passage for refrigerant condensed with a radiator and a second heat transfer tube 15-2 acting as a flow passage for refrigerant vaporized with an evaporator is provided in which the first heat transfer tube 15-1 is arranged inside the second heat transfer tube 15-2, and the first heat transfer tube 15-1 and the second heat transfer tube 15-2 are formed into a helical shape. The dimension of the second heat transfer tube 15-2 in a first direction 19A is larger than dimension in a second direction 19B, the first direction 19A and the second direction 19B being defined on the section of the second heat transfer tube and orthogonal to each other. The first heat transfer tube 15-1 is in contact with the inner circumferential surface of the second heat transfer tube 15-2.SELECTED DRAWING: Figure 3
Inventors:
KONUMA TOMOHITO
KASHIWAKURA GO
KASHIWAKURA GO
Application Number:
JP2015012999A
Publication Date:
August 04, 2016
Filing Date:
January 27, 2015
Export Citation:
Assignee:
HITACHI APPLIANCES INC
International Classes:
F28D7/10
Domestic Patent References:
| JP2005164210A | 2005-06-23 | |||
| JP2008025902A | 2008-02-07 | |||
| JP2002162177A | 2002-06-07 | |||
| JP2005009851A | 2005-01-13 |
Foreign References:
| US4147037A | 1979-04-03 |
Attorney, Agent or Firm:
Polaire Patent Business Corporation
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