JPH0356768Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an improvement in a heat exchanger suitable for use in cooling the temperature inside a housing of, for example, an electronic device or device.

[Prior art]

Various electronic devices and devices that are made up of printed circuit boards with a large number of electronic components mounted thereon, power supplies, etc. generate a large amount of internal heat when energized, and the heat generated by the electronic components due to the rise in temperature inside the housing is large. In order to prevent this effect, it is necessary to provide some kind of cooling means. The most commonly used cooling method is a forced air cooling system, which uses a fan or the like to forcibly supply outside air into the housing, and then circulates the air inside the housing before exhausting it. It is necessary to prevent dust and the like from entering the body using a filter, and furthermore, the problem arises that maintenance and inspection work must be performed frequently due to clogging of the filter. Moreover, such a filter not only lacks reliability in terms of its filtration performance, but also has the disadvantage that it is completely defenseless against moisture and the like. In particular, for this type of electronic equipment and devices, in order to maintain the performance of the electronic components inside, it is necessary to prevent dust, moisture, etc. from entering the housing as much as possible. .

For this reason, in this type of electronic equipment and devices,
It is conceivable to attach a heat exchanger to a part of the casing for cooling the inside of the casing by alternately forming passage grooves that allow air inside the casing and outside air to circulate and exchanging heat between them. ing. According to such a heat exchanger, it is possible to prevent dust, moisture, etc. from entering the housing by partitioning each passage groove, and a number of various configurations have been proposed in the past. .

However, all conventional heat exchangers of this type have complicated configurations, are troublesome to mold, and not only lead to high costs, but also have poor heat exchange efficiency despite their large size. This caused problems. In other words, in this type of heat exchanger, the heat exchange efficiency is proportional to the product of the heat transfer area and the wind speed. In order to do this, it is necessary to narrow the groove width of the inner and outer passage grooves to increase the total number of grooves, and at the same time to increase their length.As a result, the airflow can be blown smoothly and efficiently into the grooves mentioned above. This resulted in the drawback that it was said that it was not possible. Also,
In a conventional heat exchanger, the heat transfer part is
A structure in which inner and outer passage grooves are alternately formed by sequentially bending plate materials so that the cross section has a substantially U-shape is generally adopted, but the forming process is not only troublesome, but also Turbulence tends to occur at the inlet and outlet portions of each passage groove, and the inflow and outflow of airflow is obstructed, reducing the flow of air.
The drawback was that heat exchange efficiency decreased. This is clear from the fact that at the inlet and outlet of each passage groove, there is a wall part adjacent to the wall part forming the other groove, and the air flow collides with this wall part to create a turbulent flow.

Furthermore, since this type of heat exchanger is usually attached to the side wall of the equipment housing, in order to secure internal space, there is a need for the overall size to be smaller and more compact, and in particular to be thinner. There is a need for a configuration that can meet such demands.

[Summary of the idea]

The present invention has been developed in view of the above-mentioned circumstances, and by stacking and assembling a large number of plate pieces at predetermined intervals, each longitudinal end and the side end adjacent to the other end It is equipped with a heat transfer plate body that alternately forms passage grooves that allow different fluids to flow between the side portions, and the side edge portions of each plate piece over the entire width direction at each end in the longitudinal direction are connected to each other. Formed by bending in opposite directions to close the passage groove between adjacent plate pieces in this bending direction, and forming a part of the side edge portion opposite to each adjacent end side edge portion. A heat exchanger is formed by bending it to the side so as to close the passage groove between the adjacent plate pieces in this bending direction, and is opened adjacent to the joint part at both ends and the side edge. The opening area of the fluid inlet/outlet is formed to be wider than the groove width of each passage groove, and the opening part of each passage groove excluding the inlet/outlet part of the heat exchange fluid on the side of the heat transfer plate body is made into a sealing member. The simple structure of closing each passage groove allows for smooth air flow through each passage groove, improving heat transfer efficiency, and is also cost-effective due to the miniaturization of the device and ease of molding. The present invention provides a heat exchanger.

〔Example〕

Hereinafter, embodiments will be described in detail using embodiments shown in the drawings.

Figures 1 to 3 show an embodiment of the heat exchanger according to the present invention, and in this embodiment, it is used for heat radiation that is attached to various electronic devices and devices and cools the air inside the housing with outside air. We will explain the case where it is used as

First, to briefly explain the schematic structure of the heat exchanger indicated by the reference numeral 1 in FIG. are arranged vertically. Further, a heat transfer plate body 4 as shown in FIGS. 2 and 3 is disposed in the center of the casing 2 in the longitudinal direction (vertical direction in the drawing). The heat transfer plate body 4 has inner and outer passage grooves 5 for exchanging heat between the fluids by circulating the internal air of the casing 3 and the outside air that cools it.
It is formed as an assembly of a large number of plate pieces 7 that alternately form plate pieces 6.

Further, above the heat transfer plate body 4 in the casing 2, upper air is provided which opens into the casing 3 through an in-casing air intake port 8 formed on the inner surface of the casing 2 facing into the casing 3. A chamber 9 is formed, and a fan 10 for sucking air inside the case is disposed inside the chamber 9. In this embodiment, the fan 10 is provided at the intake port 8 portion, but the fan 10 is not limited to this, and may be provided horizontally at the upper end of the heat transfer plate body 4 within the air chamber 9. Of course it's a good thing. Then, from the upper air chamber 9 to the heat transfer plate body 4
The air inside the housing introduced into the inner passage groove 5 is guided downward along this passage, and
An exhaust port 11 is bored in the inner surface of the casing 2 so as to open into the casing 3 from the side at the lower end of the casing 2.
is exhausted from.

On the other hand, a lower air chamber 13 is formed below the heat transfer plate body 4 within the casing 2, into which outside air from outside the casing 3 is introduced via an intake port 12 formed on the outer surface of the casing 2. There is. A fan 1 for sucking outside air is provided at this intake port 12 portion with a filter 14 for removing dust and the like contained in the outside air.
5 are arranged. Of course, like the fan 10 described above, this fan 15 may be arranged horizontally at the lower end of the heat transfer plate body 4 separately from the filter 14. On the outer surface of the casing 2 located on the upper end side of the heat transfer plate body 4 and outside the casing 3, the outside air guided from the lower air chamber 13 along the outer passage groove 6 is directed outside the casing 3. An exhaust port 16 for exhausting the air is provided.

In addition, 17 and 18 in the figure are the heat transfer plate bodies 4.
As shown in FIG. Exhaust port 1 outside
In order to seal the openings of the passage grooves 5 and 6 formed in areas other than the portions corresponding to the outlets of the heat exchange fluid corresponding to 1 and 16, so that the passage grooves 5 and 6 from the inlet to the outlet can be appropriately formed. It is provided in

Now, according to the present invention, in the heat exchanger 1 having the above-described configuration, the heat transfer plate body 4 for exchanging heat between the air inside the housing and the outside air is arranged as shown in FIGS. 2 and 3. Constructed as a laminate of a large number of plate pieces 7, and these plate pieces 7
Inlet 5 of inner and outer passage grooves 5 and 6 formed by
a, 6a and outlets 5b, 6b in the longitudinal direction of the plate pieces 7, 7 forming the other passage groove, and between the side edge portions of one end in the longitudinal direction, and between the side edge portions of the side adjacent to the other end. It is unique in that it can be expanded by joining.

To explain this in detail, the plate piece 7
As is clear from the figure, it has a substantially flat plate shape that is elongated with a predetermined width dimension, such as an iron plate,
It is made of materials with good thermal conductivity, such as copper plates and aluminum plates. A large number of these plate pieces 7 are stacked at predetermined intervals, and connected to a connecting rod 1 with spacers 19a interposed as appropriate.
9 (indicated by a dashed line in the figure), the passage grooves 5,
form 6.

Further, the plate piece 7 has both end portions 7a and 7b whose respective end side edge portions in the longitudinal direction are bent in opposite directions, and whose tips extend in the plane direction. These both ends 7a,
Of the side edges in the width direction adjacent to 7b, the opposite sides 7c and 7d are bent in opposite directions as described above. By stacking the plate pieces 7 having such a shape while inverting them alternately by 180 degrees, as shown in FIG. The above-mentioned openings are connected to the inlets 5a, 6a and the outlet 5 of the passage grooves 5, 6.
It will be easily understood that this corresponds to b and 6b.

That is, according to the heat transfer plate body 4 having the above-described configuration, the inlet 5a of the passage groove 5 corresponding to the upper air chamber 9 of the casing 2 and the exhaust port 11 on the inner surface
and the outlet 5b are respectively opened as an opening having a width twice the width of the groove, and the other passage groove 6 side is closed by joining the plate pieces forming this. Yes, and
Since this closed part only faces the joining edges of the two plate pieces, there is no turbulence when air is introduced or exited at this part, and a smooth air flow can be obtained. It is. Of course, this also applies to the passage groove 6 side facing between the lower air chamber 13 and the exhaust port 16, and furthermore, the opening part between the passage grooves 5 and 6 other than the part mentioned above is in contact from the width direction. The sealing members 17 and 18 are used to ensure a secure seal.

In the figure, reference numeral 19b indicates a space interposed between the enlarged openings, and the corresponding closing portion is joined by, for example, welding.

Therefore, according to the above-described configuration, the heat transfer plate body 4 can be formed by simply laminating a large number of plate pieces 7 by simple pressing or the like to have the necessary openings and closing parts. To obtain passage grooves 5 and 6 which are not only easy to mold and assemble, but also have twice the opening groove width when forming the same number of grooves as before. This makes it possible to make the air flow smooth and appropriate, greatly improving the heat transfer efficiency, and it is also effective in making the whole device smaller and more compact.

Further, according to the present invention, the entrances 5 of the passage grooves 5 and 6 are provided at each end of the heat transfer plate body 4 over the entire area.
a, 6a, and outlets 5b, 6b of the passage grooves 5, 6 are formed over a predetermined length on the side close to the other end.
The advantage is that the width of the passage in the width direction can be made approximately equal across the entire passage, and fluid pooling is less likely to occur when fluid flows in and out, resulting in a smooth flow of fluid and improved heat exchange efficiency. There is also.

As shown in FIG.
By arranging 0 and 15 above and below, the thickness t can be made as small as possible, and miniaturization can be achieved, which is advantageous in terms of installation space.

It should be noted that the present invention is not limited to the structure of the embodiments described above, but the shape and structure of each part can be modified and changed as appropriate, and devices and devices to which it can be applied can be considered in various fields.

For example, in FIG. 1, the direction of air flow to each passage groove 5, 6 may be reversed from that in the embodiment,
Furthermore, it is possible to attach filters 14 to the suction ports 10, 12 and the exhaust ports 11, 16 as required.

It goes without saying that the plate pieces 7 constituting the heat transfer plate body 4 may be stacked together so that each plate piece 7 has a substantially zigzag cross section as shown in FIG. 4 a, b, and c. This has the advantage of increasing the heat transfer area. Further, although a configuration in which plate pieces 7 having substantially flat plate shapes are individually combined has been described, it is also clear that a structure in which two or three pieces are arranged in a row by bending may also be used.

[Effect of idea]

As explained above, according to the heat exchanger according to the present invention, by assembling a large number of plate pieces by stacking them at predetermined intervals, each end in the longitudinal direction and the side end adjacent to the other end The heat transfer plate body is provided with a heat transfer plate body that alternately forms passage grooves that allow different fluids to flow between the heat transfer plate body and the side portions that extend across the width direction at each longitudinal end of each plate piece. are bent in opposite directions to close the passage groove between the adjacent plate pieces in this bending direction, and a part of the side edge portion is separated from each adjacent end side edge portion. The heat exchanger is bent on the opposite side so as to close the passage groove between the adjacent plate pieces in this bending direction, and is opened adjacent to the joints at both ends and side edges. The opening area of the inlet/outlet for the heat exchange fluid is formed so as to be wider than the groove width of each passage groove, and the opening area of each passage groove excluding the inlet/outlet area for the heat exchange fluid on the side of the heat transfer plate body is sealed with a sealing member. Since the structure is simple, it is not only superior in terms of workability and cost, but also allows air to be introduced into and taken out of each passage groove, and to flow smoothly within each passage groove. This has excellent practical effects in that the heat transfer efficiency can be increased, the heat transfer area can be increased, and the device can be downsized at the same time.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view showing an embodiment of the heat exchanger according to the present invention, and FIGS.
3 is an exploded perspective view of a main part showing the plate pieces constituting the heat transfer plate body, and FIGS. 4A, B, and C are views showing another embodiment of the present invention. It is. DESCRIPTION OF SYMBOLS 1... Heat exchanger, 2... Casing, 3... Equipment housing, 4... Heat transfer plate body, 5, 6... Passage groove, 5a, 6a... Inlet, 5b, 6b... Outlet,
7... Plate piece, 7a, 7b... Bent end,
7c, 7d...Folded side part, 8, 12...Intake port, 9, 13...Air chamber, 10, 15...Fan, 11, 16...Exhaust port, 17, 18...Sealing material, 19 ...Connection rod, 19a, 19b...
Spacer.

Claims (1)

[Scope of utility model registration request] In a heat exchanger equipped with a heat transfer plate body 4 that alternately forms passage grooves 5 and 6 through which different fluids flow by stacking and assembling a large number of plate pieces 7 at predetermined intervals, this heat transfer plate body 4
Each of the passage grooves 5 and 6 is formed so as to allow each of the fluids to flow between the respective end portions facing each other in the longitudinal direction and the end-side portion of the side portion adjacent to the opposite end, Each of the plate pieces 7 is formed by bending side edge portions over the entire width direction at each end in the longitudinal direction in opposite directions, and forming a passage groove 5 between adjacent plate pieces 7 in the bending direction. ，
6, and a portion of the side edge portions adjacent to each of these end side edge portions is bent to the opposite side from the adjacent end side edge portions, and this bending is performed. It is joined so as to close the passage grooves 6, 5 between adjacent plate pieces 7 in the direction, and is connected to these by the joints between the side edge portions of both ends and the joints between the side edge portions of the side portions. The opening areas of the fluid inlets 5a, 6a and the fluid outlets 5b, 6b that are opened adjacent to each other are formed to be wider than the groove width of each passage groove 5, 6, and A heat exchanger characterized in that the opening portions of the passage grooves 5 and 6 formed by each plate piece 7 are respectively closed by seal members 17 and 18, except for the inlet and outlet portions of the heat exchange fluid.