JPS6099989A - Layered type heat exchanger - Google Patents

Abstract

PURPOSE:To prevent generation of bypass flow as well as fluctuation of layering direction due to temperature by a method wherein the peripheral rim of one manifold mechanism is secured to the inner peripheral surface of a pressure vessel through a bonding layer while an expandable bellows is interposed at the half way position of the other manifold mechanism. CONSTITUTION:The manifold mechanisms 32, 33 are interposed between the lower end face of a layer body 22 and a flange 24 as well as between the upper end face of the laminate body 22 and the flange 25. The manifold mechanism 32 is constituted of a manifold main body 34, adhered airtightly to the lower end face of the layer body 22 by a bonding agent, and a connecting pipe 35 while a bypass path is intercepted by a bonding layer even if there is a gap between the outer peripheral surface of a heat exchanger main body and the inner peripheral surface of the pressure vessel. On the other hand, the manifold mechanism 33 is constituted of the manifold main body 51, adhered airtightly to the upper surface of the laminate body 22 by bonding agent, and a connecting mechanism 52 connected to the main body 51 while the connecting mechanism 52 is consisting of an annular body 55, arranged so as to be contacted with the upper surface of the manifold main body 51, the annular body 56, arranged so as to be contacted with the lower surface of the flange 25, and the bellows 57 communicating the annular bodies 55, 56 airtightly.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a laminated heat exchanger, and particularly to a laminated heat exchanger in which a heat exchanger main body can be stably installed in a pressure-resistant container.

[Background technology of the invention and its problems]

2. Description of the Related Art Conventionally, a stacked heat exchanger has been known as a small-sized heat exchanger that is incorporated into a refrigeration system or the like. The main part of this laminated heat exchanger, that is, the heat exchanger body, is generally made of a thin aluminum plate with good heat conduction, such as a disk-shaped heat transfer plate, as shown in Figure 1. 1 and heat insulating plates 2 made of thin fiber-reinforced glass plates and having the same diameter as the heat transfer plate 1 are alternately laminated as shown in FIG. Each of the heat insulating plates 2 has a slot 1 for causing the first fluid to flow therethrough. T-shaped holes 3 are formed radially, and holes 4 for allowing the second fluid to flow between these holes are respectively formed. Further, a plurality of holes 5 are formed at positions corresponding to the holes 3 of the heat exchanger plate 1.

Furthermore, a plurality of holes 6 are also formed at positions relative to the holes 4. Then, holes 3 in the heat insulating plate 2 and holes 5 in the heat transfer plate I. Both plates I and 2 are bonded together with an adhesive so that the holes 4 of the heat insulating plate 2 and the holes 6 of the heat exchanger plate I communicate with each other, and the heat exchanger plate 1
and heat insulating plates 2 are laminated one after another so as to be positioned alternately to form the entire laminate 8 as shown in FIG. Therefore, in the laminate 8, as shown in FIG.
This means that second fluid passages 10 in which holes 4 and holes 6 are alternately connected extend in parallel to the stacking direction, and these first fluid passages 9 are indicated by solid line arrows in the figure. By passing high-temperature fluid and passing low-temperature fluid through the second fluid passage 10 as shown by the broken line arrow in the figure, heat exchange is performed between the two fluids via the heat exchanger plate 1. There is.

By the way, in the case of a laminated heat exchanger where the heat exchanger main body is configured as described above, protection of the main body is required.

In order to prevent fluid leakage from the main body and to facilitate installation, the main body is usually housed in a pressure-resistant container, and the two flow paths mentioned above are connected to external piping within this pressure-resistant container. A method of connecting a manifold mechanism is adopted.

However, when the above configuration is adopted, the following problems occur. In other words, the main body of a heat exchanger with a laminated structure is usually made by connecting a heat exchanger plate and a heat insulating plate with several tens of layers together using an adhesive.
0 sheets are laminated. Therefore, it is difficult to match the amount of thermal expansion or contraction of the main heat exchanger with that of the pressure vessel. Therefore, the outer diameter of the heat exchanger body is usually set smaller than the inner diameter of the pressure vessel. If this setting is made, a gap will inevitably be created between the outer circumferential surface of the heat exchanger main body and the inner circumferential surface of the pressure vessel.

On the other hand, in order to simplify the structure, the manifold mechanism uses the space between the end face of the heat exchanger body and the opposing wall of the pressure vessel as one flow path. Ru.゛For this reason, a part of the fluid flowing through one of the channels does not pass through the heat exchanger body, but passes through the gap between the outer circumferential surface of the heat exchanger body and the inner circumferential surface of the pressure vessel. There is a risk of causing damage. In this way, pie
If a path is formed in the heat exchanger, the heat exchange efficiency will inevitably be reduced. Therefore, it is necessary to cut off the pi-cess path by some means.

Further, the length of the heat exchanger body in the stacking direction changes depending on the temperature. Therefore, it is necessary to absorb this change in length by some means. Furthermore, since the heat exchanger body is a laminate with an adhesive of uncertain thickness interposed therebetween, the length of the resulting heat exchanger body in the lamination direction will vary from piece to piece. Easy to use. Therefore, it is necessary to take some measure to prevent the above-mentioned irregularities from affecting assembly. Furthermore, in order to be able to use it in any location, it must have sufficient vibration resistance. In this way, all of the above-mentioned requirements must be met in order to stably install the heat exchanger body within the pressure vessel. Conventionally,
Although several proposals have been made to meet the above requirements, the reality is that none are fully satisfactory.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a laminated heat exchanger that can satisfy all of the above-mentioned demands.

[Summary of the invention]

The stacked heat exchanger according to the present invention includes a pressure-resistant container.

It is housed in this pressure-resistant container, and is partitioned by the heat transfer plate, the heat insulation plate, and the adhesive into a laminate in which heat transfer plates and heat insulation plates are laminated alternately with an adhesive interposed between them. and a heat exchanger body formed by forming two systems of fluid passages in the stacking direction.

A pair of manifold mechanisms are connected to both end faces in the stacking direction of the heat exchanger body to respectively connect the two fluid passages to external piping, and the one manifold mechanism has a peripheral edge that is fixed to the inner circumferential surface of the pressure-resistant container via an adhesive layer that functions as a material,
The other manifold mechanism is characterized in that a bellows that is expandable and retractable in the stacking direction is interposed at an intermediate position.

〔Effect of the invention〕

As described above, the peripheral edge of one manifold mechanism is fixed to the inner circumferential surface of the pressure vessel via an adhesive layer that functions as a sealing material. Therefore, even if a gap exists between the outer circumferential surface of the heat exchanger main body and the inner circumferential surface of the pressure vessel, the bypass path created by this gap is completely cut off by the adhesive layer. Therefore, it is possible to prevent a decrease in heat exchange efficiency caused by the binox flow. Further, the heat exchanger body is completely fixed to the inner surface of the pressure vessel via one manifold mechanism and an adhesive layer. Therefore, even if an external force is applied, it is reliably held within the pressure vessel. Also,
By selecting the type of adhesive, it is possible to prevent cracks from forming in the adhesive layer. Therefore, not only assembly is facilitated, but also sufficient sealing performance can be ensured. In addition, as the other manifold mechanism uses a bellows that can be expanded and contracted in the stacking direction at an intermediate position, the length in the stacking direction changes depending on the temperature of the heat exchanger body due to the function of the bellows. It is possible to absorb irregularities in length during manufacturing.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 4, reference numeral 21 is a pressure container having a cylindrical outer shape, and 22 is a heat exchanger housed within the pressure container 21 and having an outer diameter smaller than the inner diameter of the pressure container 21. The main body and trench are laminates formed similarly to the laminate 8 shown in FIG.

The pressure vessel 21 has a body 23 formed in a cylindrical shape made of stainless steel, and airtight welding to both ends of the body 23 at the positions indicated by A and B in the figure so as to close the openings at both ends of the body 23. attached stainless steel flank 24.2
It consists of 5. Holes 26.27° and 28.29 formed by drawing are provided in the center and periphery of the flannel portion 24.25. One end of the fluid guide tube 30 is inserted into the hole 28 .

In this state, it is welded to the flange 24 in an airtight manner. Similarly, one end of the fluid guide tube 31 is inserted into the hole 29, and in this state is welded to the flange 25 in an airtight manner.

Thus, between the lower end surface of the laminate 22 and the flank portion 24 and between the upper end surface of the laminate 22 and the flank portion 25, there is a manifold main body 34 which is airtightly attached by a manifold machine, and this manifold main body 34. The connecting pipe 35 is connected to the connecting pipe 35. Manifold body 34
teeth.

Among the holes whose openings are located on the lower end surface of the laminate 22 in the figure, the holes belonging to the first fluid passage are the holes 3 provided in the center.
6 in common communication, and also.

The hole belonging to the second fluid passage is connected to the manifold body Q j
L -7R-/,,7ffJ[9J l-/7)F+
J+F style! 7.5 and 7.5 are formed in a structure that communicates with each other in common. At the top and bottom of the connecting pipe 35 in the figure, the lower surface of the manifold body 34 and the flank 24 are shown.
Flange portions 3g and 39 are formed, respectively, in contact with the inner surface of. A cylindrical portion 40 that fits into the hole 36 is formed on the second surface of the flange portion 38, and a cylindrical portion 40 that fits into the hole 36 is formed on the lower surface of the flange portion 39.
A cylindrical portion 4I that fits into the cylindrical portion 4I is formed. And the cylinder part 4
The outer surface of the cylindrical portion 41 and the inner surface of the hole 36 are hermetically connected by adhesive, and the outer surface of the cylindrical portion 41 is welded to the flank 24 in an airtight manner. The cylindrical portion 41 includes a fluid guide tube 4.
2 is inserted, and in this state, the fluid guide tube 42 is welded to the cylindrical portion 41 in an airtight manner.

Further, a projecting peripheral wall 43 having an outer diameter smaller than the outer diameter of the manifold body 34 is provided on the lower surface of the manifold body 34 in the drawing. This projecting peripheral wall 43 is hermetically welded to the inner surface of the pressure vessel 21 at a position indicated by A, and is fitted into an annular adageter 44 having a protrusion P on the inner peripheral surface. The inner circumferential surface of the adapter 44 and the outer circumferential surface of the projecting peripheral wall 43 are airtightly connected by an adhesive layer 45.

, - 10,000, the manifold mechanism 33 includes a manifold body 51 that is airtightly adhered to the upper surface of the laminate 22 in the figure with an adhesive;
It is comprised of a connection mechanism 52 connected to this manifold body 51.

The manifold main body 5 allows the holes belonging to the first fluid passage among the holes whose openings are located in the upper end surface of the laminate 22 to communicate in common with the hole 53 provided in the center part, and The structure is formed so that the holes belonging to the fluid passages are commonly communicated with the space 54 existing between the manifold main body 5I and the flank portion 25. The connection mechanism 52 includes an annular body 55 disposed in contact with the upper surface of the manifold main body 510 in the figure, and an annular body 56 disposed in contact with the lower surface of the flank portion 25 in the figure.
and a bellows 57 that allows these annular bodies 56 and 55 to communicate in an airtight manner. A cylindrical portion 58 that fits into the hole 53 of the manifold main body 51 projects from the lower surface of the annular body 55 in the figure, and a cylindrical portion 59 that fits into the hole 27 of the flank portion 25 on the upper surface of the annular body 550 in the figure. is installed protrudingly. The outer circumferential surface of the cylindrical portion 58 and the inner circumferential surface of the hole 53 are airtightly connected by an adhesive, and the outer circumferential surface of the cylindrical portion 59 is hermetically welded to the flank portion 25.
Then, one end portion of the fluid guide tube 60 is inserted into the cylindrical portion 59, and in this state, it is hermetically connected to the cylindrical portion 59 by welding. In addition, 61 in Figure 1 indicates an auxiliary ring for welding, and 6
2 is a laminate 22? :, Indicates the grooves for aligning each heat exchanger plate and each heat insulation plate when forming, 63.64
indicates a groove used for positioning when bonding the manifold body 34.51f to the laminate 22.

With such a configuration, various assembly methods can be adopted, and an example will be explained below.

That is, the adapter 44 is welded to the inner surface of the flank portion 24, the cylindrical portion 41 of the connecting pipe 35 is inserted into the hole 26, and the cylindrical portion 41 is welded to the flank portion 24. Next, manifold bodies 34 are attached to both end surfaces of the laminate 22.
．． 51 is adhered to an integrated product. Next, the hole 36 provided in the manifold main body 34 and the cylindrical portion 40 are fitted together, and the projecting peripheral wall 43 and the adder 44 are fitted together. At this time, each fitting portion is airtightly connected with an adhesive.

Next, the body portion 23 is fitted onto the laminate 22 and welded to the flank portion 24 at the position indicated by A in an airtight manner. Next, the cylindrical portion 58 of the connection mechanism 52 is fitted into the hole 53 of the manifold body 51. At this time, the two are hermetically connected with adhesive. Next, the flange portion 25 is attached and welded to the body portion 23 in a hermetically sealed manner at the position indicated by B. Weld the necessary parts below. The heat exchanger configured in this way connects the stacked body 22 through the fluid guide pipe 6o+42.
passing a hot fluid through a first fluid passageway within;

The low-temperature fluid is made to flow through the second fluid passage in the stacked body 22 through the fluid guide tubes 3θ and 31 for use.

With the above 414 configuration, one side of the laminate 22 is firmly fixed to the inner circumferential surface of the pressure vessel 21 through the protruding peripheral wall 43 to the adhesive layer 45 to the adageter 44f, and the other side is firmly fixed to the inner circumferential surface of the pressure vessel 21. 34 - adhesive layer - connection pipe 35 - it is firmly fixed to flank portion 24 . Therefore, the laminate 22 can be stably supported within the pressure vessel 21, and the vibration resistance can be improved. Projecting peripheral wall 43r adhesive layer 45. The space 37 and the gap existing between the inner circumferential surface of the body 23 and the outer circumferential surface of the laminate 22 are completely partitioned off by the adder 44.
In other words, it can be sealed. Therefore, it is possible to prevent a decrease in heat exchange efficiency that is likely to occur due to the presence of the gap. Furthermore, the presence of the bellows 57 can absorb changes in the length of the stacked body 22 in the stacking direction due to temperature and unevenness in length during assembly, resulting in the above-mentioned effects being obtained.

Although the type of adhesive was not mentioned in the above-described embodiment, an epoxy adhesive is suitable for use in a refrigerator. Also.

The means for fixing the outer peripheral edge of the manifold to the inner peripheral surface of the pressure vessel via the adhesive layer is not limited to the means in the embodiment.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the components of the heat exchanger main body in a stacked heat exchanger, Fig. 2 is a perspective view of the heat exchanger main body, and Fig. 3 is a perspective view taken along the line X-X in Fig. 2. FIG. 4 is a vertical cross-sectional view of a laminated heat exchanger according to an embodiment of the present invention. 21... Pressure vessel, 22... Laminate, J2,
33... Manifold mechanism, 44... Adapter, 4
5・°. Adhesive layer, 57... bellows. Applicant's agent Patent attorney Takehiko Suzue Figure 1 n52
Figure 3 j14

Claims (1)

[Scope of Claims] The heat exchanger plate is contained in a pressure vessel and a laminate housed within the pressure vessel, in which heat exchanger plates and heat insulating plates are laminated alternately with an adhesive interposed between them. a heat exchanger body formed by forming two fluid passages in the stacking direction separated by the heat insulating plate and the adhesive;
A pair of manifold mechanisms are connected to both end faces in the stacking direction of the heat exchanger body to respectively connect the two fluid passages to external piping, and the one manifold mechanism has a peripheral edge sealed with a seal. fixed to the inner circumferential surface of the pressure-resistant container via an adhesive layer that functions as a material,
A laminated heat exchanger characterized in that the other manifold mechanism has a bellows interposed at an intermediate position thereof that is expandable and retractable in the lamination direction.