Heat exchanger and refrigeration cycle device using the same

a technology of heat exchanger and cycle device, which is applied in the field of heat exchanger, can solve the problems of increasing thermal conduction loss, difficult to use such a structure of heat exchanger, and inability to use refrigerant types, so as to improve heat exchanger pressure resistance, improve heat exchanger performance, and reduce heat loss at the inl

US20070214829A1Inactive Publication Date: 2007-09-20PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
Publication Date
2007-09-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

An object is to improve a pressure resistance and a thermal performance of a heat exchanger and to provide the heat exchanger suitable for use in a refrigeration cycle device in which carbon dioxide is used as a refrigerant. The evaporator (the heat exchanger) includes a pair of plate materials, the whole periphery of a peripheral portion of an outer plate as at least one of the plate materials is secured to the other plate material constituting a bottom surface of an inner tank to constitute a sealed refrigerant passage space between the plate materials, a portion of the outer plate other than the peripheral portion is provided with a plurality of secured inner portions which are secured at predetermined intervals to the bottom surface, and a plurality of refrigerant inlet tubes and refrigerant outlet tubes are attached so as to communicate with the refrigerant passage space.
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Description

BACKGROUND OF THE INVENTION

[0001] The present invention relates to a heat exchanger. The present invention more particularly relates to a heat exchanger for use in a refrigeration cycle (vapor-compression refrigeration cycle) device in which a refrigerant circuit including a compressor, a condenser (or gas cooler or condensing heat exchanger or gas cooling heat exchanger), a throttling means and an evaporator is constituted and in which carbon dioxide is introduced as a refrigerant, and a refrigeration cycle device using the heat exchanger.

[0002] Heretofore, in a refrigeration cycle device in which a refrigerant circuit including a compressor, a condenser, a throttling means and an evaporator is constituted, a fluorocarbon-based refrigerant has broadly been used. However, in recent years, this type of refrigerant cannot be used owing to global environment problems such as prevention of ozone layer destruction and prevention of global warming, and attempts to use carbon dioxide as ...

Examples

embodiment 1

[0025] A refrigeration cycle device of the present embodiment is one example applied to a device which cools and insulates milk immediately after drawn until the milk is shipped. FIG. 1 is a schematic constitution diagram of the refrigeration cycle device of one embodiment to which the present invention is applied. A refrigeration cycle device 1 of the present embodiment is provided with a refrigerant circuit 2 constituted by connecting a compressor 10, a condenser (condensing heat exchanger or gas cooler or gas cooling heat exchanger) 11, an expansion valve 14 as a throttling means and an evaporator 16 in an annular form via pipes so as to form a closed circuit. That is, a high-pressure refrigerant pipe 40 connected to the compressor 10 on a discharge side is connected to an inlet of the condenser 11. The condenser 11 is a heat exchanger which performs heat exchange between a refrigerant and a heat medium to release heat of the refrigerant to the heat medium. It is assumed in the p...