JPH0634283A - How to make a space heat exchanger - Google Patents

Abstract

(57) [Abstract] [Purpose] The plate and fins are joined securely, and the shape and material of the flow path can be changed for each fluid. A highly efficient and highly reliable method for manufacturing a space heat exchanger is provided. To provide. [Configuration] Plates 11, 13, 14 and core portion 12
A, 12B and 12C are formed by electroforming. The plates 11, 13, 14 and the core portion 12 are electroformed integrally to form a complete joint, and if the material can be electroformed, the material can be selected for each fluid A, B, C. The passages 3A, 3B, 3C can also be formed into a shape according to the analysis result of the heat transfer, so that a highly efficient and highly reliable space heat exchanger can be manufactured.

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 method of manufacturing a space heat exchanger, which can arbitrarily change the shape of a material and a flow path according to a fluid to be heat-exchanged, thereby improving thermal performance and reliability. It is intended to.

[0002]

2. Description of the Related Art At a space station, which is currently under planning, there is heat received from the external space environment and heat generated inside the space station. These heats are efficiently operated and unnecessary heat is generated by a radiator. It is necessary to constantly maintain the temperature in the space station within the allowable range by radiating heat to space through the space.

For this reason, in addition to the main heat transport system, a plurality of heat control systems are provided, and a refrigerant according to the conditions is circulated in each heat control system to perform heat exchange, and unnecessary heat is mainly transmitted through the heat exchanger. It is transmitted to the heat transport system and released to space by the radiator of the entire space station.

As described above, the heat exchanger used in space is
For example, as shown in FIG. 2, a plate fin heat exchanger known as a heat exchanger capable of obtaining a high heat transfer surface density is formed, and a heat exchange in which plates 1 and fins 2 are alternately laminated. The heat exchange section 3 is provided with headers 4 at both ends of the heat exchange section 3, and fluid inlets 5A for the three fluids A, B, C are provided.
5B, 5C and fluid outlets 6A, 6B, 6C are provided.

As the fluid A, for example, chlorofluorocarbon is used, and as shown in FIG. 2B, it flows into the header 4 from the fluid inlet 5A and passes through the chlorofluorocarbon fluid passage 3A of the heat exchange section 3. Are discharged to the outside from the fluid outlet 6A, and similarly, for example, ammonia is used as the fluid B, and water is used as the fluid C. As shown in FIGS. , 5C to flow into the header 4, and the fluid flow path 3 such as ammonia in the heat exchange section 3
While being discharged to the outside from the fluid outlets 6B and 6C through the B and water fluid flow paths 3C, heat exchange is performed between the three fluid freons, ammonia, and water.

[0006] In such a space heat exchanger, the plates 1 and the fins 2 are alternately laminated to assemble the entire heat exchange section 3 and after the header 4, the fluid inlet 5 and the outlet 6 are attached. It has been practiced to put the entire heat exchanger in a heating furnace and join it by brazing.

[0007]

In such a method of manufacturing a space heat exchanger, after the final assembly is completed,
Since the whole is integrally brazed by putting it in the furnace, the soundness of the heat exchange part 3 can be inspected only at the final product stage, and even if a brazing defect is found, There is a problem that this cannot be repaired and the entire heat exchange section 3 in the stacked state must be discarded.

Further, the heat exchange conditions such as the flow rate and the temperature are different depending on the three fluids A, B and C to be heat-exchanged, and the performance of the heat exchanger is improved by changing the shape and material of the fluid passage 3A. Even if attempting to make a drawing, it is difficult to use different materials for the respective fluids A, B, C, or to form the flow paths 3A having different shapes, etc., due to restrictions in the manufacturing process, such as ensuring joining by brazing. There's a problem.

The present invention has been made in view of the above problems of the prior art, and can be manufactured while confirming that the plate and the fins are securely joined to each other. The present invention intends to provide a method for manufacturing a space heat exchanger which can change materials and has high efficiency and high reliability.

[0010]

In order to solve the above problems, a method for manufacturing a space heat exchanger according to the present invention is a space in which heat is exchanged between a plurality of fluids flowing through a core portion partitioned by a plate. In manufacturing the heat exchanger for use, the plate and the core portion formed on the plate surface are alternately formed by electroforming with a material and a shape according to the heat exchange condition of the fluid. It is characterized by that.

[0011]

According to this manufacturing method of the space heat exchanger, the plate and the core portion are formed by electroforming, and the plate and the core portion can be integrally bonded to each other. In this way, as long as it is a material that can be electroformed, the material can be selected for each fluid, and the shape of the fluid flow path can be made to match the analysis result of heat transfer.

As a result, a highly efficient and highly reliable space heat exchanger can be manufactured.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a manufacturing process diagram according to an embodiment of a method for manufacturing a space heat exchanger of the present invention.

The space heat exchanger manufactured by this method for manufacturing a space heat exchanger has the same basic structure as that described in FIG. 2, and the same symbols are given to the same functional portions. Heat exchange is performed with the three fluids A, B, and C, but the shape of each fluid channel and the material used are different.

In the manufacturing method of this heat exchanger for space, as shown in FIG.
As shown in (a), first, a metal plate 11 corresponding to the size of the heat exchange section 3 is prepared. This plate 1
1 is a plate constituting a fluid flow path 3C for water, which is the fluid C, for example, and is formed by electroforming nickel on a copper plate, for example.

Next, as shown in FIG. 1 (b), a core portion 12 in which fins 2 forming a fluid flow path 3C are arranged at regular intervals on a plate 11 whose surface is nickel is formed by electroforming. Form.

Since water flows through the core portion 12C of the fluid flow path 3C, the fins 2 are spaced apart from each other by other fluid flow paths 3A, 3A.
Larger than 3B. The shape such as the interval and height of the core portion 12C is determined by the result of the heat transfer analysis based on the heat transfer conditions such as the flow rate and the temperature, and the shape is set in accordance with the result.

The core portion 12C is manufactured by electroforming. When the height of the fins 2 is, for example, about 1.2 mm, nickel is used to form an electroformed layer slightly thicker than the height of the fins 2 and then it is machined. A groove may be formed to form the fluid flow path 3C, or an electrically conductive wax may be used as a core to integrally electroform the groove portion.

Thereafter, as shown in FIG. 1 (c), a plate 13 for partitioning the core portion 12C for water and the core portion 12B which is the fluid channel 3B for the next ammonia is manufactured by electroforming. , The core portion 12B is manufactured by electroforming.

In the core portion 12B of the fluid flow passage 3B, the distance between the fins 2 is made smaller than that of the other fluid flow passages 3A and 3C because ammonia flows. This core part 1
The shape such as the interval and height of 2B is determined by the result of the heat transfer analysis based on the heat transfer conditions such as the flow rate and the temperature, and the shape is set in accordance with the result.

In this case, since the lower surface of the plate 13 constitutes the fluid passage 3C, nickel is first electroformed, and then the fluid passage 3B for ammonia is formed on the nickel. For example, silver is used. Plate 13 is electroformed, and then core portion 12B is electroformed using silver of the same material.

The electroforming method for the core portion 12B is based on the fin 2
After forming an electroformed layer of silver thicker than the height of the above, any of the methods of machining or electroforming the silver fins 2 integrally using a core may be used.

Next, as shown in FIG. 1D, a plate 14 for partitioning the core portion 12B for ammonia and the core portion 12A which is the fluid channel 3A for the next CFC is manufactured by electroforming. The core portion 12A is manufactured by electroforming.

In the core portion 12A of the fluid flow passage 3A, since the CFCs flow, the fins 2 are spaced apart from each other by the other fluid flow passage 3
The size is intermediate between A and the fluid channel 3C. The shape such as the interval and height of the core portion 12A is determined by the result of the heat transfer analysis based on the heat transfer conditions such as the flow rate and the temperature, and the shape is set accordingly.

In this case, since the lower surface of the plate 14 constitutes the fluid passage 3B, silver is first electroformed, and then the fluid passage 3A for the next CFC is formed on this silver. For example, copper is used. Plate 14 is electroformed, then core portion 12A
Is electroformed using copper of the same material.

The electroforming method for the core portion 12A is based on the fin 2
After forming an electroformed layer of copper thicker than the height of the above, any of the methods of machining or electroforming the copper fins 2 integrally using a core may be used.

Thereafter, as shown in FIG. 1E, the plate 11, the core portion 12C, the plate 13, and the core portion 12 are formed.
The core 12 of the space heat exchanger is formed by repeatedly electroforming B, the plate 14, and the core portion 12A in order.

Further, the header 4 is integrally electroformed with the core 12, and the fluid inlets 5A, 5B, 5C and the fluid outlets 6A, 6B, 6C are integrally formed by an electroforming method, or by welding later. The space heat exchanger is completed by joining them together.

According to the manufacturing method of such a space heat exchanger, the plates 11, 13 and 14 and the core portions 12A and 1 are formed.
Since 2B and 12C are integrally formed by the electroforming method, a defective joint does not occur and a highly reliable heat exchanger can be manufactured.

Further, since the electroforming method is used, the shape and the material to be used can be arbitrarily changed by the respective fluid flow paths 3A, 3B, 3C, and the heat exchange performance can be greatly improved. .

In the above embodiment, the case of applying the triple heat exchanger for exchanging heat between three fluids has been described.
It is not limited to this type, and the fluid used is not limited to the embodiment.

The shape of each fluid channel and the material used are not limited to those in the above embodiment, and any shape and material that can be electroformed may be used.

Further, in the above-mentioned embodiment, the layers are laminated only on one side at the time of manufacturing, but they may be electroformed on both sides at the same time.

Further, each constituent element may be modified within the scope of the present invention.

[0035]

As described above in detail with one embodiment, according to the method for manufacturing a space heat exchanger of the present invention, the plate and the core portion are formed by the electroforming method. The plate and core can be integrated together for complete joining, and the material can be selected for each fluid as long as it can be electroformed, and the shape of the fluid flow path can be adjusted according to the heat transfer analysis results. can do.

As a result, the reliability can be greatly improved with an integrated structure having no joint portion, and a space heat exchanger having high thermal performance can be manufactured by arbitrarily selecting the shape and material of the fluid flow path. be able to.

[Brief description of drawings]

FIG. 1 is a manufacturing process diagram of an embodiment of a method for manufacturing a space heat exchanger of the present invention.

FIG. 2 is a structural explanatory view of a conventional space heat exchanger.

[Explanation of symbols]

 2 Fins 3 Heat exchange part 4 Header 5A, 5B, 5C Fluid inlet 6A, 6B, 6C Fluid outlet 11, 13, 14 Plate 12, 12A, 12B, 12C Core part A fluid B fluid C fluid

Claims (1)

[Claims] 1. When manufacturing a space heat exchanger for exchanging heat between a plurality of fluids flowing through a core portion partitioned by a plate, the plate and the core portion formed on the plate surface are A method for manufacturing a space heat exchanger, characterized in that a material and a shape corresponding to a heat exchange condition of a fluid are alternately formed by an electroforming method.