JPS5872889A - Heat exchanger - Google Patents

Abstract

PURPOSE:To enable to efficiently absorb the heat of low temperature gaseous fluid by a structure wherein a plurality of porous members with larger heat conductivity and with a large number of finer pores and porous members with the heat conductivity smaller and with pores coarser that those of the porous members just mentioned above are laminated one over the other alternately. CONSTITUTION:A plurality of the first porous members 2 with larger heat conductivity made of metal such as fine-meshed wire gauze or the like and the second porous members 3 with smaller heat conductivity than that of the member 2 made of organic material such as coarse-meshed fluorinated resin net or the like are laminated closely one over the other alternately in order to form the passage of low temperature gas. In other words, the low temperature gas is flowed perpendicular to the porous members 2 and 3 as indicated with the arrow 4. Owing to the structure as described above, the heat loss due to heat conduction along the direction of gas flow within the low temperature gas passage can be reduced, resulting in enabling to efficiently absorb the heat of low temperature gas with low pressure loss.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat exchanger in which a large number of porous members having a large number of holes are densely stacked, and more particularly to a heat exchanger suitable for absorbing all of the heat of a low-temperature gas fluid.

A conventional heat exchanger of this type that absorbs the heat of low-temperature gas fluid is a thick wire mesh with a thermal conductivity of 1?, as shown in the m1 diagram. This was done by flowing a low-temperature gas fluid through a flow path formed by stacking multiple layers densely, so the pressure loss of the low-temperature gas fluid was relatively large, and the heat due to conduction in the flow direction through the laminated wire mesh was small. The disadvantage was that losses were large.

An object of the present invention is to provide a heat exchanger that efficiently absorbs heat from a low-temperature gas fluid with low pressure loss.

The present invention is characterized by a first porous member having a large number of fine pores having a large thermal conductivity, and a second porous member having a smaller thermal conductivity and a larger size of the fine pores than the first porous member. A flow path is formed by densely piling up a plurality of porous parts of Reduces loss due to 4vC,
The aim is to obtain a heat exchanger with low pressure loss.

An embodiment of the present invention will be explained below with reference to FIG. 2 is made of paulownia, the first porous material such as thin wire mesh, which has a high thermal conductivity, and 3 is made of paulownia, which has a relatively poor thermal conductivity and has a coarse mesh, or is made of coarse metal, or a material such as bubbly resin or polyamide resin. A second porous member such as a net made of an organic material is used to connect these porous members 2.
and 3 are stacked alternately and densely to form a flow path for low-temperature gas.

Low-temperature gas flows into the porous area 2. as shown by arrow 4 in Figure 2.
Flow in the direction perpendicular to 3. By doing this,
By exchanging heat with the low-temperature gas with the first porous member 2 having a high thermal conductivity, the heat of the low-temperature gas can be efficiently absorbed. As described above, the same effect can be obtained by alternately laminating two or three sets of the two types of porous members instead of alternately laminating them. Keita, here, the first
The wire mesh used as the porous member 2 may be a perforated plate having a plurality of small holes. This small hole has a diamond shape, limited to round shape,
It may also be a square shape. Such a perforated plate can achieve a heat transfer efficiency comparable to or higher than that of a wire mesh. The fact that the perforated plate has high thermal conductivity is not a problem. Next, the net used as the second porous member 3 is made of a coarse metal or organic material with low thermal conductivity, and is made by processing thin wires of the same material into a spiral shape or the like.
The same effect can be obtained by using an edge inserted between the wire mesh or perforated plate used for the first porous member 2 described above.

According to the invention, the heat of the low temperature gas fluid is reduced to low pressure drop (3) Kaya 1 diagram The arrow has the effect of being able to absorb it efficiently.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the grooves hv and k of the main parts of a conventional heat exchanger, and FIG. 2 is a perspective view showing the structure of the main parts of an embodiment of the heat exchanger of the present invention. 2... First porous member, 3... Second porous member.

Claims (1)

[Claims] 1. In a heat resistor formed by densely stacking a large number of thermally conductive porous members each having a large number of pores, a first porous member having a large thermal conductivity and having a large number of fine pores; A heat exchanger characterized in that a second porous member having a thermal conductivity smaller than that of the first porous member and a second porous member having larger fine pores are laminated closely. .