Heat exchange plate

Abstract

A heat exchange plate includes main protrusions, intermediate protrusions and non-protruded portions. The main protrusions having a truncated cone or pyramid shape are placed in positions based on a pattern on the plate. The intermediate protrusion is placed between two main protrusions that are adjacent to each other at a shortest distance so that the main protrusion is connected to two other main protrusions through two intermediate protrusions. The intermediate protrusion is defined by a flat portion extending to opposing surfaces of the two main protrusions. The intermediate protrusion has a peak portion placed in a lower position than a top of the main protrusion. The non-protruded portion is placed between adjacent intermediate protrusions. The non-protruded portion is placed in a lowest position relative to a protruding direction of the main and intermediate protrusions so as to provide a recess surrounded by the main and intermediate protrusions.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates a heat exchange plate, which is formed of a metallic plate and to be used in combination with the other heat exchange plates having the same structure so that they are combined in parallel and integrally with each other to form a heat exchanger, and especially to such a heat exchange plate that permits to provide an integrally combined state for the heat exchanger in which an appropriate heat exchange can be made between heat exchange fluids in correspondence with differences in characteristic property therebetween, while causing the heat exchange fluids to flow along the opposite surfaces of the heat exchange plate, respectively, thus enhancing heat exchange efficiency. [0003] 2. Description of the Related Art [0004] If there is a demand that heat transfer coefficient is increased to enhance heat exchange efficiency, utilizing a heat exchanger by which transfer of heat (i.e., heat exch...

AI Technical Summary

Benefits of technology

[0021] According to the fifth aspect of the present invention, the heat exchange plate has the pattern of irregularity in which the main protrusions are provided in the form of truncated cone on the metallic plate. When the heat exchange plate is combined to the other heat exchange plate having the same structure so that they face each other on the same side and the tops of the main protrusions of the former plate come into contact with the corresponding tops of the main protrusions of the latter plate, or projections formed on the rear sides of the recesses surrounded by the main protrusions of the former plate come into contact with corresponding projections formed on the rear sides of the recesses surrounded by the main protrusions of the latter plate, to form a combined unit, and then the thus formed combined unit is combined to the other combined units in the same manner, a gap in which wide and narrow areas repeatedly continue along lines along which the main protrusions are aligned on the plate is formed between the respective adjacent two plates. As a result, the gaps having different configuration and size are provided on the opposite surfaces of the plate. Such gaps provide different passages, thus achieving different heat transfer performan

Problems solved by technology

However, a high pressure of the heat exchange fluid flowing between the plates may cause deformation of the gasket member, thus disabling an appropriate separation of the fluids from being ensured or leading to an unfavorable variation in distance between the plates.

In such a case, an effective heat exchange may not be carried out, thus causing a problem.

In view of these facts, the conventional heat exchanger involves a problem that the heat exchange fluids can be utilized only in a pressure range in which the gasket member withstands.

However, such a pattern of irregularity could not achieve a balance of decrease in pressure lo

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