Combined heat exchanger

a heat exchanger and heat exchange technology, applied in indirect heat exchangers, lighting and heating apparatus, stationary conduit assemblies, etc., can solve the problems of heat exchange efficiency degradation, performance and reliability degradation of cooling systems, etc., and achieve the effect of reducing the pressure on the shell tube, improving heat exchange efficiency and reducing the effect of oil-staying
US20110232868A1Inactive Publication Date: 2011-09-29CALSONIC KANSEI CORP
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
CALSONIC KANSEI CORP
Publication Date
2011-09-29
Estimated Expiration
Not applicable · inactive patent

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Abstract

A combined heat-exchanger includes a first air-cooled heat-exchanger for cooling coolant for a heat generator other than an internal combustion engine in an automobile and a second air-cooled heat-exchanger for cooling refrigerant for air-conditioning. The first air-cooled heat-exchanger includes an upstream tank into which the coolant flows, a downstream tank form which the refrigerant flows out, flow channel members that communicate the upstream tank with the downstream tank, heat release fins that are alternately stacked with the flow channel members, and a water-cooled heat-exchanger for cooling the refrigerant. The water-cooled heat-exchanger is disposed within the downstream tank, and includes an inlet port to which the refrigerant flows at its upper portion and an outlet port from which the refrigerant flows out at its lower portion. According to the heat-exchanger, staying of oil mixed in the refrigerant can be prevented, heat exchange efficiency can improve and downsizing can be achieved.
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Description

TECHNICAL FIELD

[0001] The present invention relates to a combined heat exchanger that uses plural types of refrigerants (e.g. engine coolant and air-conditioning refrigerant) in a cooling cycle for an automobile.BACKGROUND ART

[0002] A heat exchanger is disclosed in Japanese Patent Application Laid-Open No. 2006-162176 [Patent Document 1].

[0003] This heat exchanger is used in an air conditioner for a vehicle, and a heat exchanger for air-conditioning refrigerant is implemented in a tank (header) of an air-cooled heat exchanger for engine coolant to cool air-conditioning refrigerant by air-cooled coolant. In this heat exchanger for air-conditioning refrigerant, the refrigerant is flown into from its lower side and frown out from its upper side.

[0004] Oil for a compressor is subject to be mixed in air-conditioning refrigerant, and the refrigerant circulates in a system together with the mixed oil. Some of the mixed oil separates from the refrigerant.SUMMARY OF INVENTION

[0005] In the heat ex...

Claims

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