Heat exchanger

Abstract

A heat exchanger having excellent heat exchanging performance is obtainable by a simple production technique and at a low cost. This is achieved by providing a fin member and by increasing heat conductivity between the fin member and a meandering tube body. Further, the heat exchanger is made compact for high degrees of layout freedom, enabling the heat exchanger to be installed in a tight space. Engagement grooves (8) are provided in both end surfaces (6, 7), which are opposite to each other, of a fin member (5) in which fins (4) are parallelly arranged. Straight tube sections (2) are parallelly arranged, with gaps (16) in between, in the engagement grooves (8) of the fin member (5). The straight tube sections (2) are connected at bent sections (3). A pair of meandering sections (11, 12) is arranged opposite to each other with an insertion gap (17) of the fin member (5) in between. One (11) of the meandering sections and the other meandering section (12) are connected by a connection tube (13) to form a meandering tube main body (1). The straight tube sections (2) of the one meandering section (11) are arranged in the engagement grooves (8) in the one end surface (6) of the fin member (5) inserted and arranged in the insertion gap (17) between the one meandering section (11) and the other meandering section (12) of the meandering tube body (1), and the straight tube sections (2) of the other meandering section (12) are arranged and fixed in the engagement grooves (8) in the other end surface (7).

Description

field of invention [0001] The present invention relates to fluid cooling pipes such as fuel pipes and oil pipes for automobiles and general industrial use, EGR gas cooling devices, air conditioners for adjusting the temperature and humidity of living spaces, and other heat exchangers. , a heat exchanger with excellent heat exchange performance can be obtained at low cost. Background technique [0002] So far, there are fluid cooling pipes such as fuel pipes and oil pipes for automobiles and general industries, EGR gas cooling devices, air conditioners for adjusting the temperature and humidity of living spaces, and other heat exchangers. For example, as shown in Patent Document 1, on the fuel pipe for automobiles, a fuel cooler having tanks such as cooling water, refrigerant for automobile air conditioners, or other refrigerant liquids is connected, and oil materials, etc. flowing in the fuel pipes are connected. Allow to cool. However, on diesel engines, etc., since the f...

AI Technical Summary

Problems solved by technology

[0011] However, in the pipe body of Patent Document 2 or 3, due to the presence of spiral or radial fin members, bending with a small radius of curvature is difficult during bending, and the volume increases, making it difficult to arrange under a narrow floor. or the back of the device, etc.

In addition, in Patent Document 4, there is a problem with the strength of each thin-plate fin. When forming the insertion through hole or when the pipe body is inserted through, the thin-plate fins are likely to be deformed or damaged, and it is necessary to be careful and labor-intensive.

In addition, using the mode of inserting the through-pipe main body into the thin-plate fin, it is quite difficult to bend and insert a single pipe main body. The U-shaped air pipe connects the ends of adjacent straight pipes, and the connection between the straight pipe and the U-shaped air pipe is fixed by welding or brazing.

However, due to thin plate fins or a three-dimensional shape, work such as welding or brazing is not easy, and it is also difficult to perform leak checks on the connection.

In addition, in the fin member formed by aluminum die-casting in Patent Document 5, since the fin member is thick, the weight reduction or miniaturization of the heat exchanger is limited, and its installation place and use are limited.

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