JPS5986892A - Heat exchanger with ultra-cold temperature device - Google Patents

Abstract

PURPOSE:To obtain a heat exchanger in small size with high efficiency and with low pressure loss, by remarkably increasing the efficiency of fins of a porous plate 8, by constituting a heat exchanger in such a manner that a plurality of porous plates, on which tubes through which hot fluid in high pressure flows, being bend and thermally adhered to the plates, are laminated, and the laminated plates are inserted into a tube through which cold fluid in low pressure flows. CONSTITUTION:A slender tube 9 to flow hot fluid in high pressure is put on a porous plate 8 in the shape of a letter S and is thermally adhered to the plate 8. A heat exchanger is constituted in such a manner that a plurality of porous plates constituted as mentioned above are laminated, connecting slender tubes 9 of each plate to each other, and the laminated plates are inserted into a flow tube 10 in low pressure. The high temperature fluid in high pressure is fed into the tube from an inlet 11, exchanging heat with the cold fluid in low pressure by the intermediary of porous plates 8, and is discharged from an outlet 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a heat exchanger for a cryogenic device, and particularly to a heat exchanger suitable for heat exchange between a high-pressure low-temperature liquid and a low-pressure low-temperature gas.

[Prior art]

A conventional heat exchanger of this type used for heat exchange between a high-pressure low-temperature liquid and a low-pressure low-temperature gas will be described with reference to FIGS. 1-2. A plurality of perforated plates 1 and spacer rings 2 as shown in second (at, (b)) are alternately stacked to form a flow path for low-pressure low-temperature gas 3.A high-pressure low-temperature gas The thin tube 5 through which the liquid 4 flows is wrapped around and thermally bonded.This is connected to the tube 6 and placed on the heat insulating wall layer 7.In this way, the conventional heat exchanger Since the thin tube 6 is wound around the perforated plate 1, if the outer diameter of the perforated plate 1 becomes large, the fin efficiency of the perforated plate will be significantly reduced, resulting in a decrease in heat exchange efficiency. Because it is wound in a spiral around the perforated plate,
Since the entire heat transfer area on the side surface of the perforated plate cannot be used, there is a drawback that heat resistance due to conduction increases in this area and heat exchange efficiency decreases.

[Purpose of the invention]

An object of the present invention is to provide a compact heat exchanger capable of exchanging heat between a low-temperature gas fluid and a low-temperature liquid with high efficiency and low pressure loss.

[Summary of the invention]

A feature of the present invention is that a plurality of tubes through which high-pressure low-temperature fluid flows are bent and thermally bonded, and a plurality of tubes are stacked on the perforated plate surface. By inserting the fin into the perforated plate, the fin efficiency of the perforated plate is significantly improved, resulting in high efficiency,
The aim is to obtain a compact heat exchanger with low pressure loss.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 3 and 4. As shown in FIG. 3, thin tubes 1-1 through which high-pressure, high-temperature fluid flows are arranged in an S-shape on the surface of the perforated plate 8 and are thermally connected. A plurality of the perforated plate thin tubes 9 formed in this way are stacked while being connected, and are inserted into a low-pressure flow path tube 10 to form a structure. The high-pressure, high-temperature fluid enters from the inlet 11 and exchanges heat with the low-pressure, low-temperature fluid through the perforated plate 8.
Go to 2. By bending the thin tubes 9 in an S-shape or the like on the surface of the perforated plate and attaching them, the fin efficiency of the perforated plate is increased, and the heat exchange efficiency is significantly improved.

According to the present invention, the heat exchange efficiency per perforated plate is significantly improved, so the number of required perforated plates can be reduced, and as a result,
This has the effect that a heat exchanger with low pressure loss can be obtained.

〔Effect of the invention〕

According to the present invention, the fin efficiency relative to the heat transfer area of the perforated plate can be increased, so the amount of heat exchange per per perforated plate increases, and the number of perforated plates relative to the required amount of heat exchange is significantly reduced. In the end, the overall pressure loss can be reduced.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of an example of a conventional stacked heat exchanger;
The figure is a perspective view showing the structure of a conventional laminated heat exchanger. FIG. 3 is a front view of a perforated plate that is a component of the heat exchanger of the cryogenic apparatus of the present invention, and FIG. 4 is a perspective sectional view of the heat exchanger of the cryogenic apparatus of the present invention. 1... Perforated plate, 2... Spacer ring, 3...
Low pressure fluid, 4... High pressure fluid, 5... Thin tube, 8...
Perforated plate, 9... Thin tube, 10... Low pressure fluid flow path pipe, 1
1...tubule. Figure 1 Father-in-law Z Figure (L) (b) Figure 3

Claims (1)

[Claims] In a heat exchanger for a cryogenic device that exchanges heat between a high-pressure, low-temperature fluid and a low-pressure, low-temperature fluid, the tubes through which the high-pressure, low-temperature fluid flows are bent and glued onto the surface, and the heat conduction is thermally connected. 1. A heat exchanger for a cryogenic device, characterized in that it is constructed by laminating a plurality of perforated plates or wire meshes and inserting them into a flow path tube for a low-pressure, low-temperature fluid.