JP5105183B2 - Heat exchange unit and heat exchanger using the same - Google Patents

Description

  The present invention relates to a small and efficient heat exchange unit and a heat exchanger using the same.

  A plate heat exchanger is most commonly known as a heat exchanger. This is a structure in which a plurality of heat transfer plates are laminated and integrated via a frame-shaped gasket, and the first and second heat exchange media are circulated through the heat transfer plates, thereby passing through the heat transfer plates. It is a device that performs heat exchange. However, since the flow path of the heat medium is partitioned at an acute angle, the slurry tends to accumulate in this portion. There is also a problem that miniaturization is difficult.

  In order to solve such problems, for example, in Patent Document 1, a liquid feeding hole is drilled in the center of a rectangular plate provided with an outer frame, and a spiral wall that spreads from the position of the liquid feeding hole is formed. A plate-type heat exchange device has been proposed in which a liquid-side heat transfer plate having a recirculating outer periphery and a steam-side heat transfer plate are alternately stacked. However, in this apparatus, the spiral frame is a partition for elongating the flow path of the heat exchange medium, and the heat exchange is performed between the adjacent “steam side heat transfer” chamber through the heat transfer plate. It is. Therefore, when the size is reduced, the heat transfer area is reduced, and the efficiency is lowered.

  Patent Document 2 discloses a heat exchange formed between two heat transfer plates, in which a gasket is provided on the heat transfer surface and a plurality of stacked heat transfer plates are stacked as a combination unit. A plate-type heat exchanger is disclosed in which the flow path of the medium is a spiral flow path that communicates between the liquid passage holes formed in the central part and the corner part of the main body of the heat transfer plate. . Although this technique is structurally different from Patent Document 1, the basic mechanism is almost the same. That is, each of the first and second heat exchange media passes through adjacent channels with the heat transfer plate interposed therebetween, and the spiral channel wall does not contribute to heat exchange. Therefore, the heat transfer area contributing to the heat exchange is limited by the size of the heat transfer plate, and if the size is reduced, the heat exchange efficiency is significantly reduced.

  Furthermore, Patent Document 3 shows another type of scroll-type laminated heat exchanger. This is because a plurality of fluid flow paths are formed by alternately laminating heat transfer plates made of porous metal plates and spacers, and between the plurality of fluids flowing through the angular fluid passages by in-plane heat transfer of the heat transfer plates. In a laminated heat exchanger that performs heat exchange, the spacer is formed of a flat plate having a plurality of spiral holes in the radial direction, and the same shape of the spacers is stacked via a heat transfer plate to form a plurality of spiral shapes. A fluid flow path is formed. In this heat exchanger, since a plurality of spiral holes are provided in the spacer, the processing is difficult and the volume efficiency is deteriorated. Further, since the heat transfer is not a spiral spacer but a flat porous metal plate disposed adjacent to the spacer, the heat transfer area is limited.

  On the other hand, many existing methods have been proposed as a method for producing a metal endless belt. For example, as described in the prior art item of Patent Document 4, a belt-shaped stainless steel sheet is used as a raw material, this is bent, both ends are butted together, electron beam welding is performed, the welded portion is polished, and finally plated. A method is disclosed.

Japanese Patent Publication No.43-298 Japanese Patent No. 3054648 Japanese Examined Patent Publication No. 62-17157 Japanese Patent Publication No. 7-84894

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a heat exchange unit that is small and easy to manufacture and has high heat exchange efficiency, and a heat exchanger using the heat exchange unit.

  In order to solve the above-mentioned problems, the heat exchange unit according to the present invention forms an endless belt-like ring made of a highly heat-conductive material in a spiral shape, and holds the rings in close contact with each other by gaskets. As a partition, the flow paths of the first and second heat exchange media are adjacently secured inside and outside the ring.

  It is also preferable that a spiral recess is provided on the gasket surface and the ring is disposed in the recess.

  In addition, an elastic buffer member can be disposed at a contact portion between the ring and the gasket.

  As a heat exchanger using the heat exchange unit, a fluid inlet and an outlet are provided in the vicinity of both ends of the circulation path inside the ring formed in a spiral shape and in the circulation path outside the ring, respectively. Features.

  It is also preferable to form a stacked heat exchanger by stacking a plurality of the above heat exchange units and providing a fluid inlet and outlet for connecting the units.

  Depending on the type of heat exchange medium or the amount of exchange heat, the heat exchange units can be connected in parallel or in series with respect to the fluid flow.

  Also, depending on the requirements of the heat exchange medium, it is also preferable to open either the fluid inlet or the outlet outside the spiral ring on the side surface of the gasket.

  In the heat exchange unit according to the present invention, an endless belt-like ring having good heat conductivity is formed in a spiral shape and used as a heat conduction partition, so that the heat conduction area can be extremely increased in a small heat exchanger volume. Moreover, since an endless belt-like ring is used, there is no fear that the heat exchange media are mixed. Therefore, it is possible to provide a heat exchanger that is easy to manufacture, is small, and has high thermal efficiency.

  In addition, according to the present invention, it becomes possible to stack a desired number of heat exchange units, and the connections between the units can be made in parallel or in series with respect to the flow path of the heat exchange medium, Various developments are possible depending on the type of heat exchange medium and the amount of exchange heat.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a state in which an endless belt-like ring having good heat conductivity used in the heat exchange unit of the present invention is formed in a spiral shape. FIG. 9 shows the ring before processing. The spiral ring shown in FIG. 1 can be obtained by holding two places of such an annular ring and rotating one of the holding portions with respect to the other. Since this ring serves as a heat transfer partition, the material needs to have high thermal conductivity, and is also required to be flexible because it is processed into a spiral shape. Accordingly, metals such as stainless steel are particularly suitable, but the material is not particularly limited as long as the thermal conductivity is high.

  FIG. 11 shows another embodiment of a spiral ring. The right side of the figure is an enlarged view, and the surface area is increased by forming irregularities on the ring itself. Thereby, a heat transfer area can be increased further.

  FIG. 3 shows a perspective view of a first embodiment of the laminated heat exchanger according to the present invention. In this embodiment, the basic heat exchange unit 11 has three stages and the bottom unit 31 is laminated to form a four-stage structure. The lid unit 21 is arranged at the top, and all the units are joined and adhered by bolts 24 to heat. It is an exchange. A first heat exchange medium inlet 22 and a first heat exchange medium outlet 23 are provided on the lid unit 21.

  FIG. 2 shows a state in which the lid unit 21 of the laminated heat exchanger embodiment shown in FIG. 3 is removed. 1 is a basic heat exchange unit. The endless belt-shaped ring partition wall 1 shown in FIG. 1 is accommodated in a circular dish-shaped gasket 2, and the first and the second are respectively inside and outside the ring 1. The distribution paths 3 and 4 of the second heat exchange medium are secured. In addition, a plurality of bolt holes 12 are provided in the peripheral portion of the gasket 2, and the units separated by bolts are joined and tightened to bring the ring partition wall 1 and the gasket 2 into close contact with each other, thereby preventing the heat exchange medium from being mixed. is doing.

  Although not shown in the drawing, the adhesiveness between the ring partition wall 1 and the gasket 2 can be improved by providing a spiral recess on the surface of the gasket 2 and arranging the ring 1 in the recess. Further, by providing an elastic buffer member at the contact portion between the ring 1 and the gasket 2, the sealing performance can be further ensured. In addition, as shown in FIG. 11, it is possible to increase the surface area by providing irregularities on the ring partition wall 1 itself to improve the heat exchange efficiency.

  FIG. 5 shows a cross-sectional view of the laminated heat exchanger according to the present invention shown in FIGS. In the heat exchanger, the first heat exchange medium flow path (ring inner path) 7 (white space) and the second heat exchange medium flow path (ring outer path) 8 partitioned by the ring partition wall 1 in the horizontal direction. (Gray spaces) are arranged alternately, and when viewed in the vertical direction, the basic heat exchange unit 11 and the bottom heat exchange unit 31 are stacked in four layers across the gasket bottom surface. In this embodiment, each heat exchanging unit is connected in parallel, and at the inlet portion of each distribution path, the communication ports 5A and 6A with the adjacent unit are also provided, and at the outlet portion of each outlet path. Connection ports 5B and 6B with adjacent units are provided.

  As is clear from FIG. 5, the bottom heat exchange unit 31 has substantially the same structure as the basic heat exchange unit, except that a heat exchange medium inlet 32 and an outlet 33 protrude from the bottom. FIG. 4 shows the appearance of the bottom heat exchange unit. Therefore, in the first embodiment, an example of a four-stage heat exchange unit configuration is shown. However, as the most basic configuration, only the lid unit 21 and the bottom heat exchange unit 31 can function as a heat exchanger. One feature of the present invention is that the number of stages of the basic heat exchange unit 11 can be adjusted according to the heat exchange capability.

  FIG. 7 shows a second heat exchanger embodiment according to the present invention. The configuration of this embodiment is basically the same as that of the first embodiment, except that a second heat exchange medium outflow opening is provided on the gasket side surface of each heat exchange unit. FIG. 6 shows a state where the lid unit 21 is removed. By providing the heat exchange medium outlet 35 in each heat exchange unit, the heat exchanged medium can be distributed in different directions. FIG. 8 shows the bottom side appearance of this embodiment. By providing the heat exchange medium outlet 35 on the side of the gasket, only the inlet 32 is provided on the bottom.

  FIG. 10 shows a configuration in which three stages of heat exchange units are connected in series as a third heat exchanger embodiment. In this example, since each heat exchange medium flows out to the next unit after passing through the spiral flow path of each unit, there is one communication port 5, 6 for each heat exchange medium.

  Next, the heat exchange mechanism of the heat exchanger according to the present invention will be described. First, as for the first heat exchanger embodiment shown in FIG. 5, the first heat exchange medium enters the first heat exchange unit from the inlet 22 of the lid unit 21 and flows through the spiral flow path. It is discharged from the outlet 23 to the outside. Further, a communication port 5A is formed on the opposite side of the inflow port 22, and is sequentially connected to the second, third and bottom heat exchange units. For this reason, the inflow heat exchange medium is distributed to each heat exchange unit and reaches the outermost part through each spiral flow path. Since each unit is connected to the outermost part through the communication port 5B for outflow, the unit is finally guided to the fluid outlet 23 along the communication port 5B. The second heat exchange medium also goes through the same path as the first heat exchange medium except that it flows in and out from the opposite side. In this embodiment, since the heat exchange units are connected in parallel, the amount of the heat exchange medium can be increased by increasing the number of units. However, in that case, it is necessary to consider the size of the inlet, the communication port, and the outlet. Further, as is apparent from FIG. 5, in this embodiment, the inlet and outlet of each heat exchange medium are on the same side.

  Next, a heat exchange mechanism will be described for the third heat exchanger embodiment shown in FIG. In the case of this embodiment, the first heat exchange medium is introduced from the inflow port 22, the entire amount is guided to the outermost part through the spiral flow path 7, and flows into the next unit through the connection port 5. This process is repeated and finally flows out from the outlet 23. For the second heat exchange medium, the principle is the same, only the flow direction is reversed. In this embodiment, since each unit is connected in series, the flow rate is limited, but the contact area or contact time between the respective heat exchange media is increased, so that it is suitable for heat exchange of a medium having a large temperature difference. Yes. In this embodiment, the inflow and outflow of the heat exchange medium are in opposite directions.

  The material used for the endless belt-like ring of the present invention is most preferably metal in consideration of thermal conductivity, but is not limited thereto. A material can be appropriately selected according to durability and the type of heat exchange medium to be used. In the present invention, heat exchange is basically performed by the partition ring 1, so that the thermal conductivity of the gasket 2 itself does not matter. Therefore, it is possible to select the material in consideration of the adhesion with the partition wall ring 1. Moreover, if a buffer material is used for the contact portion between the partition wall ring 1 and the gasket 2 as described above, the gasket 2 can also be made of metal, thereby further improving the heat exchange efficiency.

  In the heat exchange unit according to the present invention, an endless belt-like ring having good heat conductivity is formed in a spiral shape and used as a heat conduction partition, so that the heat conduction area can be extremely increased in a small heat exchanger volume. Moreover, since an endless belt-like ring is used, there is no fear that the heat exchange media are mixed. Therefore, it is possible to provide a heat exchanger that is easy to manufacture, is small, and has high thermal efficiency, and can greatly contribute to improving the performance of the small heat exchanger.

It is a perspective view which shows the partition for heat exchange which formed the endless belt-shaped ring by this invention in the shape of a spiral. It is a perspective view which shows the structure of the 1st Example of the heat exchanger using the endless belt-shaped ring partition wall by this invention. It is a perspective view which shows the external appearance of the finished product which mounted the cover unit on the 1st Example shown in FIG. It is the perspective view which looked at the 1st Example shown in FIG. 2 from the back side. It is explanatory drawing which shows the cross section in A-A 'about the finished product which mounted the lid unit in the 1st Example shown in FIG. It is a perspective view which shows the structure of the 2nd Example of the heat exchanger using the endless belt-shaped ring partition wall by this invention. It is a perspective view which shows the external appearance of the finished product which mounted the lid unit on the 2nd Example shown in FIG. It is the perspective view which looked at the 2nd example shown in Drawing 6 from the back side. It is a figure which shows the shape before the process of the endless belt-shaped ring partition wall by this invention. It is sectional drawing which shows the structure of the 3rd Example of the heat exchanger using the endless belt-shaped ring partition wall by this invention. It is a figure which shows another Example of the endless belt-shaped ring partition by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Endless belt-shaped ring partition wall 2 Gasket 3 Ring inner side path 4 Ring outer side path 5 Inner path connecting port 5A Inner inflow path connecting port 5B Inner outflow path connecting port 6 Outer path connecting port 6A Outer inflow path connecting port 6B Outer outflow path connecting port 7 Inner path 8 Outer path 9 Concavity and convexity 11 Basic heat exchange unit 12 Screw hole 21 Lid unit 22 Fluid inlet 23 Fluid outlet 24 Bolt 31 Bottom heat exchange unit 32 Fluid inlet 33 Fluid outlet 34 Bolt hole 35 Side fluid outlet opening Part

Claims (8)

An endless belt-shaped ring made of a material with good heat conductivity is formed into a spiral shape, and the upper and lower surfaces of the ring are held in close contact with gaskets, whereby the first and second heat exchanges are performed inside and outside the ring with the ring as a partition. A heat exchanging unit for a heat exchanger characterized in that a distribution path of a medium is secured adjacently. The heat exchange unit for a heat exchanger according to claim 1, wherein a spiral recess is provided on the gasket surface, and the ring is disposed in the recess. The heat exchange unit for a heat exchanger according to claim 1 or 2, wherein an elastic buffer member is disposed at a contact portion between the ring and the gasket. A fluid inlet and outlet of the fluid inside the ring inside the ring and in the vicinity of both ends of the ring, which are formed in a spiral shape using the heat exchange unit according to any one of claims 1 to 3, respectively. The heat exchanger characterized by providing. A heat exchanger according to claim 4, wherein a plurality of heat exchange units according to any one of claims 1 to 3 are stacked, and a fluid inflow port and an outflow port for connecting the units are provided. 6. The heat exchanger according to claim 5, wherein the heat exchange units are connected in parallel with respect to a fluid flow. 6. The heat exchanger according to claim 5, wherein each of the heat exchange units is connected in series with respect to a fluid flow. The heat exchanger according to any one of claims 4 to 7, wherein either the fluid inlet or the outlet outside the spiral ring is open to a side surface of the gasket.

Images