JPH0531430Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is suitable for heat exchangers for electrical equipment storage boxes, etc. that prevent the internal temperature of electrical equipment storage boxes such as large switchboards and control panels from rising. This relates to heat exchange units.

(Prior art) As a conventional heat exchange unit used in a heat exchanger for preventing a rise in temperature inside a box such as a large switchboard or control panel, for example, the heat exchange unit shown in Japanese Patent Publication No. 54-36731 is It is known that a large number of heat sinks are stacked on top of each other with elongated prismatic rubber gaskets interposed between them, and then fastened with long bolts. Since the installation direction is fixed, it is easy to make mistakes in assembly, and since the rubber gaskets interposed between the heat sinks are only long and slender prismatic shapes, the gaskets may be deformed when long bolts are tightened. Due to this, a gap is created between the heat sink and the
The drawback was that the sealing effect was insufficient and air leakage was likely to occur.

(Problems to be solved by the invention) The present invention solves these conventional problems and can be installed in either the front or back direction with respect to the casing of the heat exchanger, and has an excellent sealing effect that prevents air from entering the heat exchanger. It was completed with the aim of creating a heat exchange unit that is easy to manufacture, easy to produce, and has a good appearance.

(Means for Solving the Problems) A heat exchange unit according to the present invention which attempts to solve the above-mentioned problems has a rectangular thin metal plate with bolt insertion holes at its four corners, and blanks on one side of both sides. A large number of heat sinks each having a protruding low side wall with a side wall portion left on one end are stacked so that one ends of adjacent heat sinks are alternately positioned above and below, with the non-side wall portion between each heat sink. Alternating upper and lower spaces are formed, and the ends of the spaces are formed with a plurality of protrusions extending longitudinally on both the front and rear surfaces and a short eaves portion at the upper end, and bolt insertion holes corresponding to the bolt insertion holes of the heat sink. A slender prismatic rubber gasket provided on both sides is interposed with the protrusion in contact with the heat sink to form a side opening having a sideless wall portion between the rubber gasket and the lower side wall, and the side opening is overlapped. The heat sink is characterized in that each of the heat dissipating plates is tightened and integrated with long bolts inserted through the bolt insertion holes at the four corners of the heat sink and the bolt insertion holes of the rubber packing.

(Embodiments) Next, the present invention will be described in detail with reference to illustrated embodiments.

Reference numeral 1 denotes a heat sink having bolt holes at the four corners of a rectangular thin metal plate with excellent thermal conductivity such as an aluminum plate, and a lower side wall 2 integrally formed and projecting from one side of both edges, the lower side wall 2 of the heat sink 1 being cut out on both sides near one end 3a of the heat sink 1 to form sidewall-less portions 4, 4, and the other end 3b of the heat sink 1 being formed into an other end opening 5b. A number of such heat sinks 1 are stacked such that adjacent heat sinks 1 are upside down, and the sidewall-less portions 4, 4 are formed between the adjacent heat sinks 1, 1.
At the ends 5a of the alternating upper and lower spaces formed by the above-mentioned rubber packings 7 for the heat exchange unit, side openings are formed between the above-mentioned rubber packings 7 and the lower side walls 2, 2 on both the left and right sides of the space by the above-mentioned side wall-less portions 4, 4.
The rubber packing body 7a has a plurality of longitudinally extending ridges 6 formed on both front and rear surfaces which come into contact with the heat sinks 1, 1, and has short eaves 7c, 7c at its upper end which are extended from the tips of the ridges 6 in the front-rear direction and are stretched. Both ends of the rubber packing body 7a are formed into wide portions 7b, 7b which are widened downward, and bolt insertion holes 11 are provided within the range of each wide portion 7b at both ends. The bolt insertion holes 11 are provided at the four corners of each heat sink 1 as a whole, so that the ends 5a of the alternating upper and lower spaces formed by the side wall portions 4, 4 are sealed by the rubber packing 7.
The rubber packing body 7a is fastened together with long bolts 8 inserted therethrough to form a heat exchange unit. If the bolt holes 11 are provided in the widened portions 7b, 7b at the lower left and right ends of the rubber packing body 7a as in the embodiment, the rubber packing body 7a does not need to be made wide as a whole, and has sufficient strength to withstand long-term use without being damaged from the hole edges even when fastened with the long bolts 8, as described below. Furthermore, in order to improve the sealing between the heat sinks 1, 1 when stacked, the rear edge of the lower side wall 2 may be provided with a recess 10 into which the tip 9 of the lower side wall 2 of the adjacent heat sink 1 is fitted. In order to prevent the rubber packing 7 from being subjected to excessive compression when fastened with the long bolts 8, the periphery of the bolt holes 11 of the rubber packing 7 may be made enlarged and a suitable spacer may be fitted into the bolt holes 11.
A flat plate 12 is set on the surface of the heat exchange unit 10, and the ends of the spaces formed alternately above and below are sealed with rubber gaskets 7, thereby obtaining a heat exchange unit having alternate side openings located on both the left and right sides near the top and bottom ends.

Next, FIGS. 4 and 5 show the above-mentioned heat exchange unit in use. In the figures, 21 and 22 are casings attached to the upper and lower parts of the heat exchange unit of the present invention. Each casing 21, 22 is provided with a fan 23, 24, and the casing 2
The air inside 1 and 22 is blown out outward as shown in FIG. 5, for example. As shown in the figure, the casing 21 has a packing 25 attached to the inner surface of its front plate portion, and closes every other side opening formed with a sideless wall portion 4 on one side of the upper part of the heat exchange unit. At the same time, a window hole 26 is provided in the rear plate portion for sucking the air inside the electrical equipment storage box 50, and the lower casing 22
is provided with a window hole 27 for sucking outside air in its front plate part, and closes every other side opening formed by a sideless wall part 4 on one side of the lower part of the heat exchange unit on the inner surface of the rear plate part. It is equipped with Patsukin 28. As a result, when the fans 23 and 24 are operated, the high-temperature air inside the electrical equipment storage box 50 flows from the side opening on one side of the upper part into the flow path formed every other time between the heat sinks 1 and 1. Moreover, rubber packing 7
The outside air enters the casing 22 from the other end opening 5b on the lower side which is not sealed, and is returned to the electrical equipment storage box 50 again by the fan 24. Similarly, outside air enters the casing 21 from the other end opening 5b at the lower part and is returned to the fan 23. will be released into the atmosphere.

(Function) As shown in FIGS. 2 and 3, the device configured in this manner has low side walls 2, 2 protruding from one side of both side edges, leaving the non-side wall portions 4, 4 on one end 3a side. A large number of heat sinks 1 are stacked so that adjacent heat sinks 1 are upside down, and adjacent heat sinks 1,
A special rubber gasket 7 is used to seal the end portions 5a of the vertically alternating spaces formed by the sideless wall portions 4, 4 between them.
It is integrated by tightening with long bolts 8 while sealing with a rubber gasket 7, and every other upper and lower opening formed between each heat sink 1 is sealed with a rubber gasket 7, leaving every other opening 5b at the other end. At the same time, since the heat exchange unit has side openings located every other side with sideless wall portions 4 on both the left and right sides near the top and bottom ends, there is no directionality in the front, back, left, and right directions.
As shown in FIG. 4, when it is attached to the casings 21 and 22, it can be attached in any direction without causing an assembly error. In addition, in use, as shown in FIGS. 4 and 5, the side openings formed with the sideless wall portions 4 on one side of the upper part and the other side of the lower part, for example, are opened by the packings 25 and 28 of the casings 21 and 22. If the stacked heat dissipating plates 1 and 1 are closed, the flow path formed by the low side wall 2 and the rubber packing 7 will be divided into the opening 5b at the upper end and the non-side wall 4 near the lower end. having one side opening for holding;
The flow path is divided into one having an opening 5b at the lower end and the other side opening with the sideless wall portion 4 near the upper end, and the high temperature air sucked from inside the electrical equipment storage box and the atmosphere flow into these flow paths. If these are allowed to flow, heat exchange will be performed efficiently between the two through the heat sink 1 made of a thin metal plate. In addition, such a heat exchange unit has a casing 21, as shown in FIG.
By simply increasing the size of 22, multiple units can be installed in parallel to increase capacity.

In addition, especially in the present invention, the rubber packing 7
The rubber gasket body 7a has an elongated prismatic shape, and has a plurality of protrusions 6 extending in the longitudinal direction that are in contact with the heat dissipation plate 1 on both the front and rear surfaces, and short eaves portions 7c, 7c extending in the front and rear directions at the upper end. Since a special rubber gasket is used that has bolt insertion holes 11, 11 at both ends that correspond to the bolt insertion holes of the heat sink 1, the heat sink 1 is secured by a plurality of protrusions 6 on both the front and rear surfaces.
The degree of sealing of the opening 5a on the end 3a side of the protrusions 6, 6
Due to the labyrinth effect between them, the structure is extremely excellent, and there is no air leakage.Moreover, the short eaves 7c, 7c stretched in the front-rear direction at the upper end of the rubber packing body 7a are connected to the ends of each heat sink 1. Since it comes into contact with and covers the parts 3a and 3b, dust in the atmosphere will not enter into the electrical equipment storage box. Furthermore, the heat sink 1 is simple, with bolt insertion holes provided at the four corners and low side walls 2 integrally protruding from both side edges. A plurality of longitudinally extending protrusions 6 are formed on both surfaces corresponding to the surfaces, and bolt insertion holes 1 corresponding to the bolt insertion holes of the heat sink 1 are provided at both left and right ends.
1 and 11, and a long bolt 8.
Because it can be easily assembled into a unit just by preparing the parts, the number of parts is small, and each part has a simple structure, which is easy to procure, and is excellent in terms of storage, transportation, and assembly workability, and is inexpensive. There are advantages that can be provided.

(Effects of the invention) As is clear from the above explanation, the present invention can be installed in either the front or back direction with respect to the casing of the heat exchanger, and there is no assembly error.
By using a special rubber gasket with multiple protrusions arranged in parallel on the front and rear surfaces of the prismatic rubber gasket body, the airtightness between the heat sinks is reduced. The deformation force of the rubber gasket is weak, making it difficult to form a gap between it and the heat dissipation plate, and the labyrinth effect between the multiple protrusions is extremely superior, preventing air leaks. The short eaves extending in the front and back direction touch the ends of each heat sink and cover them neatly, so dust in the atmosphere does not enter the electrical equipment storage box, and despite its small size. It has many advantages, such as exhibiting excellent sealing effects regardless of the situation.Furthermore, it requires only a small number of parts, has a simple structure, and is easy to procure, making it easier to store, transport, and assemble. Since it is excellent from all points of view, it also has the advantage of being able to be provided at low cost, and the present invention has extremely great practical value as it solves the problems of conventional heat exchange units of this type.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway perspective view showing an embodiment of the rubber gasket used in the present invention, Fig. 2 is a partially cutaway perspective view of a heat exchange unit according to the present invention, and Fig. 3 is a partially cutaway perspective view showing an embodiment of the rubber gasket used in the heat exchange unit of the present invention. FIG. 4 is a partially cutaway perspective view showing an embodiment of the heat sink, FIG. 4 is a partially cutaway perspective view showing its usage condition, and FIG. 5 is a longitudinal sectional view thereof. 1... Heat sink, 2... Low side wall, 3a... One end,
4... Sideless wall portion, 5a... End portion, 6... Projection, 7
...Rubber packing, 7a...Rubber packing body,
7c...Short eave part, 8...Long bolt, 11...Bolt insertion hole.

Claims (1)

[Scope of utility model registration request] A rectangular thin metal plate with bolt insertion holes arranged at the four corners has sideless wall portions 4, 4 on one side of both sides of the plate and one end 3a.
A large number of heat sinks 1 with low side walls 2, 2 protruding from the sides are stacked so that one ends 3a of adjacent heat sinks 1 are positioned alternately above and below, and the non-side wall is placed between each heat sink 1, 1. A space with upper and lower parts 4, 4 arranged alternately is formed, and an end part 5a of the space has a plurality of protrusions 6 extending in the longitudinal direction on both the front and rear surfaces, and short eaves parts 7c, 7c at the upper end.
A long and slender prismatic rubber gasket 7, which is formed with bolt holes 11 and 11 on both sides corresponding to the bolt insertion holes of the heat sink 1, is inserted by intervening with the protrusion 6 in contact with the heat sink 1. A side opening with sideless wall portions 4, 4 is formed between the rubber packing 7 and the lower side walls 2, 2, and each of the stacked heat sink plates 1
A heat exchange unit characterized in that these are integrated by tightening with long bolts 8 inserted into bolt insertion holes at four corners thereof and bolt insertion holes 11 of a rubber packing 7.