JPS63161387A - Heat exchanger - Google Patents

Abstract

PURPOSE:To increase the contact area between a heat transfer member and a heat transfer tube and to improve the heat exchange efficiency thereof by interposing an intermediate heat transfer member between the heat transfer member and the heat transfer tube. CONSTITUTION:Heat transfer tubes 3 are coupled in a spiral manner to the outer peripheral wall surface of an intermediate heat transfer member 7 using a solder 6 which is a brazing material. Since the wire of wire netting comes into contact with the intermediate heat transfer member 7, and heat transfer tubes 3 easily come into contact with the intermediate heat transfer member 7, the contact area between the heat transfer member 1 and heat transfer tubes 3 is increased and the heat transfer efficiency is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a heat exchanger used in a low-temperature device such as a helium refrigeration device.

[Conventional technology]

FIG. 1 shows, for example, cryogenics, P5jl.

Published in September /q7゜ (cayooENics, SE
PTEMBER/97q, P! Fig. 6 is a partially cutaway sectional view showing the conventional low temperature heat exchanger shown in Fig. 2).
This is an enlarged view of the main part of the figure. In the figure, (1) is a disk-shaped heat transfer body made of laminated copper wire mesh (LA) which is a heat transfer plate. Refrigerant Cs) flows inside the heat transfer body (1) in the direction of the arrow in the figure. (3) is a tube (for example, a copper heat exchanger tube) that is spirally joined to the outer peripheral wall surface of the heat transfer body (1) using solder (6), which is a brazing material, and the inside of this tube is filled with, for example, high-pressure helium. A second refrigerant such as gas flows in the direction of the arrow in the figure.

(ri) is a container that houses these heat transfer elements (1) and heat transfer tubes (3).1 The low temperature heat exchanger configured as above is housed in a vacuum container (not shown) together with other low temperature components. A high-pressure gas (e.g. 5ooK, /batrn>), which is the first refrigerant stored in the heat transfer tube (3) and supplied from the compressor, is introduced into the heat transfer tube (3). A low-pressure gas (e.g. g) that is a refrigerant (g).

K, /atm) is flowed into the first refrigerant (the wire mesh C7a from the direction opposite to the wire) at a flow rate ratio of 1 to /. The first refrigerant (,
2) is diffused through the wire mesh (/a), which is a heat transfer plate, as shown in Figure 6, and as a result of the increased contact area with the wire mesh (/a), the cold heat is transferred to the element of the wire mesh (/a). Heat is conducted to the tube wall of the heat exchanger tube (3) through the wire, solder CA), and the first refrigerant C is cooled and flows out from the heat exchanger tube (3).

[Problems to be Solved by the Invention] The conventional heat exchanger configured as described above uses solder (6) on the outer peripheral wall of the heat transfer body (1) to connect the heat transfer tubes (3) directly.
) is wrapped around the wire, as shown in Figure 6, only a part of the wire of the wire mesh (/a) is in contact with the heat exchanger tube (3) through the solder (6). ) and the heat transfer body (1) are small, resulting in poor heat transfer efficiency.

This invention was made to solve the above-mentioned problems, and aims to obtain a heat exchanger with high heat transfer efficiency by perfecting thermal contact between heat exchanger tubes and heat exchanger plates. .

[Means for solving problems]

The heat exchanger according to the present invention includes a thin-walled intermediate heat transfer body made of a material with high thermal conductivity that is in surface contact with the outer peripheral wall surface of the heat transfer body, and the outer peripheral wall surface of the intermediate heat transfer body is made of a material with high thermal conductivity. It is made by joining heat exchanger tubes in a spiral shape.

[Effect]

In the heat exchanger of this invention, the wires of the heat transfer plate are in contact with the intermediate heat transfer body, and the intermediate heat transfer body is in contact with the heat transfer tube, so that the contact between the heat transfer tube and the heat transfer body is Taxes will increase;
Heat transfer efficiency is improved.

〔Example〕

Hereinafter, embodiments of this invention will be described with reference to the drawings.

FIG. 1 is a partially cutaway sectional view showing an embodiment of the present invention;
Figure 2 is an enlarged view of the main parts of Figure 1, Figures 3 and 6.
The same or corresponding parts as those in the figures are given the same reference numerals, and the explanation thereof will be omitted.

In the figure, (7) is an intermediate heat transfer body made of a thin (for example, thickness 0./U) copper plate that is wound around the outer peripheral wall surface of the heat transfer body (1) in surface contact. Transmitter (
Solder (6), which is a brazing material, is spirally applied to the outer peripheral wall of the
The heat exchanger tubes (3) are joined using.

In the heat exchanger configured as above, wire mesh (/
The strands of a) contact the intermediate heat transfer body (7), and the heat exchanger tube (3) easily contacts the intermediate heat transfer body (ri), so
The contact area between the heat transfer body (1) and the heat transfer tube (3) increases, and heat transfer efficiency improves.

In addition, in the above embodiment, a case was explained in which an integrated intermediate heat transfer body (ri) was used, but as shown in FIG. ), the heat that moves in the axial direction of the intermediate heat transfer body (7) and enters the heat transfer tubes (3) is prevented, and the heat exchange efficiency of the heat exchanger is further improved. In addition, as shown in Fig. 1, a thin tape-shaped plate is bonded to the heat exchanger tube (3) in advance with a solder (6) and then wrapped around the outer peripheral wall of the heat exchanger (1) to form the intermediate heat exchanger ( Even if 7) is formed, the same effects as in the above embodiment can be obtained. Furthermore, a punch mental may be used for the heat transfer plate instead of the wire mesh (/a). Furthermore, the solder material may be other than solder (6), such as silver solder or aluminum solder. Further, although the description has been given of a low-temperature heat exchanger using the first refrigerant (co) and the first refrigerant (da) as the medium, the present invention can also be applied to a high-temperature heat exchanger using a high-temperature medium.

〔Effect of the invention〕

As explained above, in the heat exchanger of the present invention, since the intermediate heat transfer body is interposed between the heat transfer body and the heat transfer tube, the contact area between the heat transfer body and the heat transfer tube is increased. However, it has the effect of improving heat exchange efficiency.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway sectional view showing a low temperature heat exchanger according to an embodiment of the present invention, FIG. 2 is an enlarged view of the main part of FIG. 1, and FIG. 3 is a diagram showing another embodiment of the present invention. A partially cutaway sectional view showing
Fig. y is a perspective view of a main part showing still another embodiment, Fig. 5 is a partially cutaway sectional view showing an example of a conventional low temperature heat exchanger,
FIG. 6 is an enlarged view of the main part of FIG. (1) Heat transfer body, (la) Wire mesh, Cs) First
refrigerant, (3)... heat exchanger tube, (lI)... refrigerant,
(6)...Solder, (7)...Intermediate heat transfer body. In each figure, the same reference numerals indicate the same or corresponding parts. Kabuto 1 figure 2 figures 3 figures 4''-124 children 40 sold 5 figures %6 figures

Claims (4)

[Claims] (1) A heat transfer body made of laminated heat transfer plates made of materials with high thermal conductivity, and a thin-walled intermediate material made of materials with high thermal conductivity provided in surface contact with the outer peripheral wall surface of this heat transfer body. It comprises a heat transfer body and a heat transfer tube made of a material with high thermal conductivity that is helically joined to the outer peripheral wall surface of the intermediate heat transfer body, and a medium flowing in the axial direction of the heat transfer body and the inside of the heat transfer tube are connected. A heat exchanger that exchanges heat with a flowing medium. (2) The heat exchanger according to claim 1, wherein the heat exchanger plate is a copper wire mesh. (3) The heat exchanger according to claim 1 or 2, wherein the intermediate heat transfer body is composed of a plurality of intermediate heat transfer elements arranged at regular intervals in the axial direction. vessel. (4) The heat exchanger according to any one of claims 1 to 3, wherein the brazing material is solder.