JP3021169B2 - Stacked heat exchanger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a laminated heat exchanger which performs heat exchange by alternately stacking and bonding plate-shaped heat transfer plates and spacers for separating flow paths . In particular, the heat transfer medium during heat transfer
Form a flow path parallel to the heat transfer surface to perform heat exchange
It relates to layered heat exchangers to.

[0002]

2. Description of the Related Art FIGS. 5 and 6 are an external view and a structural view of a conventional laminated heat exchanger (for example, Japanese Patent Application Laid-Open No. 60-101491). 5 and 6, reference numeral 1 denotes a laminated portion in which a porous heat transfer plate 3 and spacers 4 for separating flow paths are alternately laminated and bonded by an adhesive 5, and 2 denotes a high-temperature gas and a low-temperature gas separated and assembled. Header.

The porous heat transfer plate 3 has a large number of pores (approximately 0.3 mm in diameter) opened by photo etching (photo etching). The spacer 4 is a heat transfer medium.
It has a role of preventing the heat transfer between the high-temperature gas and low-temperature gas flow paths, which are the body, and the adjacent porous heat transfer plates 3. 5 is processed into the spacers 4 and the same shape, for example with an adhesive epoxy, and bonding the porous heat transfer plate 3 and the spacer 4 has the role of holding the airtightness. Reference numerals 6 and 8 denote low-temperature gas passages provided in the porous heat transfer plate 3 and the spacer 4, respectively, and reference numerals 7 and 9 denote high-temperature gas passages provided in the porous heat transfer plate 3 and the spacer 4, respectively.

In such a laminated heat exchanger, a porous heat transfer plate 3 made of a high heat conductor (for example, aluminum alloy or copper alloy) is used.
And a low thermal conductor such as fiber reinforced plastics (F
By alternately laminating spacers 4 using RP), a laminated portion 1 is formed.
A header 2 is provided at both ends of the laminated portion 1, and these are joined by an adhesive 5. Also,
Flow path 7,9,6,8 fluid, the <br/> hot gas to flow respectively and the low-temperature gas separated by a spacer 4
I'm trying . Additionally, heat exchange, the hot gas and the cold
This is performed via the porous heat transfer plate 3 between the gas flow paths.
Also, the hot gas, cold gas flow path, the porous heat transfer plate 3
Are usually arranged at right angles to the heat transfer surface.

Next, FIG. 7 shows a conventional Joule-Thomson cooler for cooling an infrared sensor or the like of a flying object.
In this condenser, the high pressure gas supplied from the high-pressure gas cylinder provided separately (e.g. pressure 350atm argon gas) enters from the upper part of FIG 7, after passing through the filter 11, enters the finned heat exchanger 12 Then, the gas becomes a low-temperature and high-pressure gas and adiabatically expands in the orifice 13, and liquid argon and the like are stored in the liquid storage unit 14. Liquid argon cools the infrared sensor 15, the low temperature gas is deprived of cold evaporation at the heat exchanger 12, is discharged to the atmosphere from the low pressure gas outlet 18 is cold recovered. Reference numeral 10 denotes a seal for preventing leakage of high-pressure gas, and reference numerals 16 and 17 denote an outer cylinder and an inner cylinder of a vacuum vessel for heat insulation, respectively.

The finned heat exchanger 12 of the above-described Joule-Thomson cooler has a spiral finned thin tube 12a (about 1 mm in outer diameter, 0.3-0.5 mm in inner diameter) as shown in FIG.
) Is wound into a cylindrical shape having an outer diameter of 10 mm and an inner diameter of 8 mm to form a small-sized heat exchanger. That is, it is a Hampson heat exchanger.

[0007]

SUMMARY OF THE INVENTION It is an object of the Joule-Thomson cooler shown in FIG. 7, due to the use of spiral tubes finned, it is difficult to configure as its production and the heat exchanger, the small flow rate small such as that it is difficult to, and, price there is a problem that high Kunar.

Further, in the stacked heat exchanger shown in FIGS. 5 and 6, it is difficult to reduce the hole diameter of the porous heat transfer plate 3 due to restrictions on processing methods (such as photoetching). and in order not to provide a large number of number of holes,
It cannot be used as a small high-performance heat exchanger with a relatively small flow rate as shown in FIG.

An object of the present invention is to provide a laminated heat exchanger which can solve the above problems.

[0010]

SUMMARY OF THE INVENTION The present invention relates to a high-temperature gas and a low-temperature gas for performing heat exchange in a laminated heat exchanger in which plate-shaped heat transfer plates and spacers for dividing flow paths are alternately laminated and bonded. The flow path during heat transfer of the heat transfer medium is parallel to the heat transfer surface of the heat transfer plate.
In the inner flow path and the outer flow path through which any of the hot gas passes
It is characterized in that each is divided and formed with a spacer facing the plate surface of the heat transfer plate.

[0011]

According to the present invention, in a heat exchanger in which plate-shaped heat transfer plates and spacers for dividing flow passages are alternately laminated and bonded ,
High-temperature gas during heat transfer by the heat transfer medium where the pacer exchanges heat
The flow direction of the cold gas and the heat transfer surface of the heat transfer plate are parallel .
A flow path that is, any of the heat transfer medium of high pressure gas and cold gas
Inner and outer passages for flowing the body, respectively
And are formed facing the surface of the heat transfer plate .
Therefore, a sufficient heat transfer area is secured by a simple configuration, and the heat transfer performance is enhanced. Moreover, since a porous body is not used as the heat transfer plate, it is easy to reduce the size of the heat exchanger.

Also, since a finned spiral tube or the like, which is difficult to manufacture and assemble, is not used, it is easy to manufacture, and a small high-performance exchanger with a small flow rate can be obtained.
And the price can be reduced.

[0013]

1 to 4 show an embodiment of a laminated heat exchanger according to the present invention. In FIGS. 1 and 2, reference numeral 21 denotes a laminated portion in which circular plate-like heat transfer plates 22 and 23 and circular plate-like spacers 24 for dividing flow paths are alternately laminated and bonded by an adhesive 25. is there.

The heat transfer plates 22 and 23 are made of a material having good heat conductivity such as an aluminum alloy or a copper alloy. The spacer 24 is made of a fiber-reinforced plastic (F) having good heat insulation.
RP) etc. The adhesive 25 is made of an epoxy-based material or the like and processed in the same shape as the spacer 24. 26 and 27, high for the hot gas and cold gas out of the heat transfer plate 22 and 23 respectively as heat transfer medium
A hot gas inlet and a low temperature gas inlet .

The spacer 24 is concentric with the inner and outer annular portions 2.
4a, 24b, an annular hot gas flow path 28 as an inner flow path between the annular parts 24a, 24b,
A low-temperature gas flow path 29 as an outer flow path is formed outside the outer annular portion 24b. In addition, the high-temperature gas flow path 28
It is also possible to reverse the arrangement with the low-temperature gas channel 29
It is. Further, the partition portion 30 extending radially through the annular portion 24b from the annular portion 24a is provided, hot gas inlet
Hot gas flowing from 26 into the hot gas flow path 28 , and
Cold gas from the low temperature gas inlet 27 and flows into the low temperature gas channel 29, these flow paths 28, 29 annular portion 24a, 24
The circumferential upper heat transfer plates 22 and 23 are formed with b,
You can go in and out around once.
The adhesive material 25 is the same shape as the spacer 24
The spacer 24 is connected to the heat transfer plates 22 and 2 as described above.
3. Further, the high-temperature gas inlet 26 provided in the adjacent heat transfer plates 22 and 23 and the low- temperature gas inlet 26 are provided.
The positions of the respective outlets 27 are set so as to be alternately shifted with the partition 30 interposed therebetween.

FIGS. 3 and 4 are cross-sectional views of the laminated portion 21 taken along the AB and AC sections in FIG. 2, respectively. FIG.
In FIG. 4 and FIG. 4, reference numeral 31 denotes an outer cylindrical portion on which the stacked heat exchanger is installed (the outer cylindrical portion is omitted in FIGS. 1 and 2). Low-temperature gas flow path 29 as the outer flow path between the annular portions 24b
There is formed is to so that.

In this embodiment, as shown by the arrow in FIG.
The high-temperature gas enters through a high-temperature gas inlet 26 provided in the upper heat transfer plate 22, and the spacer 24 and the adjacent heat transfer plate 2
During one rotation generally circumferentially hot gas flow path 28 formed by 2,23 performs heat transfer plates 22, 23 and the heat exchanger, the hot gas inlet provided in the heat transfer plate 23 adjacent downward
From the port 26 (see FIG. 2) , the hot gas flows into a hot gas flow path 28 provided below the heat transfer plate 23 in the figure, and forms a lower hot gas flow path 28 together with the spacer 24 through a similar path.
Heat exchange is performed with the heat transfer plates 23 and 22 to be formed . On the other hand, as shown by the center mark in FIG. 4, the low-temperature gas is supplied from a low-temperature gas outlet 27 provided in the lower heat transfer plate 22 to an annular portion of the spacer 24.
The annular portion 24b, the outer tubular portion 31, and the adjacent
The heat transfer plate 2 is rotated substantially in the circumferential direction around the low-temperature gas flow passage 29 as an outer passage formed by the heat transfer plates 22 and 23.
Performs 2,23 and heat exchanger, a low temperature gas stream adjacent the upper
Cold gas provided in the heat transfer plate 23 that form a road 29
Flowing upward from the outlet 27 (see FIG. 2), the upper cold gas flow path 27 and the spacer 24 are formed through a similar path.
The heat exchange is performed with the heat transfer plates 23 , 22 formed in the above .

[0018] As described above, in the present embodiment, therefore the spacer 24, and an inner flow path provided inside the laminated portion 21 flows in parallel to the hot gas and the heat transfer surface of the heat transfer plate 22, 23
Annular hot gas path 28 of the by, and the heat transfer plate 22, 24, 32
Outside the laminated portion 21 through which the low-temperature gas flows in parallel with the heat transfer surface of No. 3
Cold gas channel 29 as an outer flow path provided on the heat transfer plate 2
It is provided facing the plate surfaces 2 and 23, whereby a large transfer surface can be secured and the heat transfer performance can be improved.

Since the heat transfer plates 22 and 23 are not porous, the heat exchanger can be easily reduced in size.

[0020]

According to the present invention, the following effects can be obtained by providing the constitution described in the claims. (1) With a simple configuration, a sufficient heat transfer area can be ensured to enhance the heat exchange performance, and a high-performance stacked heat exchanger can be provided even with a small flow rate and small size. (2) Since a porous heat transfer plate is not used, it is easy to reduce the size. (3) The finned spiral tube conventionally used for a small heat exchanger is difficult to manufacture, and should be used as a small high-performance heat exchanger with a small flow rate.
Is difficult and the price is high, but the present invention can provide an inexpensive device.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of an embodiment of the present invention.

FIG. 2 is a configuration diagram of a laminated portion of the embodiment.

FIG. 3 is a sectional view taken along a line AB in FIG. 2;

FIG. 4 is a sectional view taken along a line IV-IV in FIG. 2;

FIG. 5 is an overall configuration diagram of a conventional laminated heat exchanger.

FIG. 6 is a configuration diagram of a laminated portion of the conventional laminated heat exchanger.

FIG. 7 is a configuration diagram of a conventional Joule-Thomson cooler.

FIG. 8 is a front view of a finned spiral tube of the conventional Joule-Thomson cooler.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 21 Laminated part 22, 23 Heat transfer plate 24 Spacer 25 Mounting material 26 Hot gas inlet 27 Cold gas outlet 28 Hot gas flow path 29 Low temperature gas flow path

Claims (1)

(57) [Claims] 1. A heat transfer medium comprising a high-temperature gas and a low-temperature gas for heat exchange in a laminated heat exchanger in which plate-shaped heat transfer plates and spacers for dividing flow paths are alternately stacked and bonded. a heat transfer surface of the flow direction the heat transfer plate when is in parallel
Inner flow passage through which the one of the transmission medium said flow path
And each divided into outer channel, the laminated heat exchanger characterized in that formed by the spacer facing the plate surface of the heat transfer plate.