JPH03204594A - Heat exchanger - Google Patents

Abstract

PURPOSE:To permit heat exchange between different fluids by a method wherein a heat transfer plate body, forming passage grooves conducting the different fluids alternately, is arranged in a casing to conduct the different fluids through respective passage grooves from respective ends of the heat transfer plate body to the other ends of the same. CONSTITUTION:An element for heat exchanger or a heat transfer plate body 4, accommodated in a casing 2 and forming passage grooves 5, 6, through which different fluids are conducted, is formed so that respective passage grooves 5, 6 are opened in the same direction of end by blocking both ends of the grooves alternately. The width of respective passage grooves 5, 6 is kept by a plurality of pins 21 planted on heat transfer walls. When the base member 20 is formed by rubber or the like, metallic pins 21 or the like, having a high heat transfer coefficient, are planted so as to penetrate the base material 20. In this case, the base material 20 is bent and received into the casing 2 to assemble them whereby sealing property between respective grooves 5, 6 can be secured and using of a seal material and the like can be omitted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in a heat exchanger suitable for use in, for example, cooling the temperature inside a housing of an electronic device, a device, or the like.

[Conventional technology]

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 within the housing increases. In order to prevent this effect, it is necessary to provide some kind of cooling means. The most common type of cooling method is a forced air cooling system, which uses a fan or the like to forcefully supply outside air into the housing, and then circulates the air inside the housing before exhausting it. It is necessary to prevent dust, etc. from entering the
Moreover, this creates a problem in 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 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 equipment, in order to maintain the performance of internal electronic components, etc., 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 equipment, passage grooves are formed alternately to allow air inside the housing and outside air to circulate, and heat exchange is performed between these passage grooves to cool the inside of the housing. A number of devices have been proposed in the past that are attached to the - section of the casing and partition the passage grooves to prevent dust, moisture, etc. from entering the casing. Most commonly, such conventional heat exchangers are formed by sequentially bending plates in a groove width direction perpendicular to the passage groove direction so as to have a substantially U-shaped cross section, thereby forming inner and outer passage grooves. A structure in which the grooves are formed alternately is known, but it is not only difficult and complicated to process, but also requires a sealing material to seal each passage groove from the other passage groove, making the structure complicated. In addition, turbulence tends to occur at the inlet and outlet portions of each passage groove, and the inflow and outflow of airflow is obstructed, resulting in a smaller flow and airflow, resulting in a lower heat exchange efficiency. This means that at the entrance and exit of each passage groove,
This can be easily understood from the fact that there is a sealing wall or the like defining the other groove in the adjacent portion, and the airflow collides with this to create a turbulent flow.

For this reason, the present applicant, for example,
According to the above publication, the side edge portions of both ends are bent in opposite directions, and a portion of the side edge portions of the side portions adjacent to the side edge portions of both ends are bent. A plurality of rectangular flat plate pieces formed by bending in the opposite direction to the bending direction are alternately combined in opposite directions, and the tips of the side edge portions bent in the combined direction are mutually connected. By stacking them together at a predetermined interval, the passage grooves through which different fluids flow can be intersected.
A heat exchanger having an element formed in the following manner has previously been proposed. According to such a structure, each part can be easily processed and assembled, and the opening area at the entrance and exit of each passage groove can be reduced by joining the side edge parts of the plate pieces forming the other passage groove. By blocking the
It can be formed to be wider than the groove width, allowing air to flow smoothly into and out of each passage groove, and improving heat exchange efficiency.

[Problem to be solved by the invention]

However, according to such conventional heat exchangers, when forming the heat transfer plate body, a large number of plate pieces made of metal plates, etc. are bent and pressurized as required, and spacers etc. are interposed between them. and stack them at predetermined intervals,
It is necessary to fasten and secure with through bolts, etc., which not only increases the number of component parts and complicates the structure, but also makes assembly work troublesome, and also causes problems such as troublesome disassembly work during maintenance. there were. Furthermore, in the above-mentioned conventional structure, the packing material for sealing the opening 11 in the passage width direction of each passage groove is also used as a main part, which causes problems in terms of the number of component parts and ease of assembly. Therefore, it is necessary to take some measures to eliminate these problems.

[Means to solve the problem]

In order to meet such demands, the heat exchanger according to the present invention includes a heat transfer plate body that alternately forms passage grooves through which different fluids flow, and a heat transfer plate body that is internally installed, and a heat transfer plate body that alternately forms passage grooves through which different fluids flow. A casing is formed on one side in the width direction of the passage at one end of the plate body and the other end facing each other, and the heat transfer plate body is configured to allow fluid to flow in each passage groove. Both ends of the direction are alternately closed so that each passage groove opens in the same end direction, and the groove width of each passage groove is set by a plurality of grooves planted in the heat transfer wall for forming the passage groove. It was formed by holding it with a pin.

[Effect]

According to the invention, by disposing a heat transfer plate body in which passage grooves for different fluids are formed in AC shape W in a casing, different fluids can flow from each end of the heat transfer plate body to the other end side. It becomes possible to cause the fluid to flow through each passage groove and to perform heat exchange.

〔Example〕

Figures 1 to 5 show an embodiment of the heat exchanger according to the present invention, and in this embodiment, the heat exchanger is attached to various electronic devices and devices and used for heat dissipation to cool the air inside the housing with outside air. We will explain the case where it is used in a heat exchanger. Further, in this embodiment, the arrow mark → in the figure indicates the flow of outside air, and the arrow mark → indicates the flow of air within the housing. However, it is not limited to this,
It is free to reverse the flow of fluid or configure the outside air and the air inside the housing to be opposite.

First, the schematic structure of the heat exchanger, which is generally designated by the reference numeral 1 in FIGS. 2, 3, etc., will be briefly described.

Reference numeral 2 indicates a casing whose entire shape is approximately a rectangular parallelepiped.
As shown in the figure, the case is shown in which it is disposed horizontally on the ceiling of the equipment housing 3. A heat transfer plate body 4 as shown in FIGS. 1 to 3 is disposed as a heat exchanger element in the center of the casing 2 in its longitudinal direction (left-right direction in the figure). This heat transfer plate body 4
For example, the inner and outer passage grooves 5 and 6 are formed alternately in order to circulate the internal air of the casing 3 and the external air that cools it, thereby exchanging heat between these two fluids. One end of each passage groove 5, 6 is closed and the other end is open by alternately folding and bending the elongated strip plate material at both ends of the passage grooves 5, 6 in the fluid flow direction. It is designed to be

In addition, on one end side of the heat transfer plate body 4 in the casing 2, a fan 8 for sucking air inside the casing is provided from a suction 07a of the air inside the casing, which is perforated on the lower side of the casing 2 facing the inside of the casing 3. An air chamber 7 is formed into which air inside the housing is introduced, and the air inside the housing sent from this air chamber 7 into the inner passage groove 5 is transferred to the heat transfer plate as shown in FIGS. 2 and 3. Air is blown into the casing 3 from an air outlet 9 that is opened on one side in the passage width direction at the other end of the body 4, that is, on the lower surface of the casing 2 facing into the casing 3. Although FIG. 2 and the like illustrate the case where the fan 8 is disposed so as to cover the suction lower a on the lower surface side of the casing 2, the present invention is not limited to this, and as shown in FIG. Of course, it may be arranged in such a manner as to cover one end.

On the other hand, an air chamber 10 is formed on the other end side of the heat transfer plate body 4 in the casing z, into which the outside air from outside the casing 3 is introduced from an intake port 10a formed in the end face of the casing 2. and an intake fan 1 so as to cover the intake port 10a.
1 is arranged.

The outside air sent from this air chamber IO to the outer passage groove 6 of the heat transfer plate body 4 flows while exchanging heat with the air inside the casing flowing on the side of the inner passage groove 5 described above, and at the front end of each The exhaust port 2 is configured to be exhausted to the outside through an exhaust port 12 formed on the upper side of the housing. 4. Of course, suitable modifications can be considered for the arrangement posture of the fan 11 on the outside air side, and the above-mentioned intake port 10a is provided with a filter for removing dust, etc. from the outside air, although not shown in the drawings. It is recommended to attach a filter.

In addition, what is shown by 13.14 in FIG. 1, FIG. 2, etc. is a heat transfer plate body 4 formed in a shape as described later.
A partition wall provided integrally or integrally within the casing 2 so as to close the terminal ends of the inner and outer passage grooves 5a and 6a formed between the outer surface in the groove width direction and the inner surface of the casing 2. .

Now, according to the present invention, as described above, the heat transfer plate body 4 as a heat exchanger element which is installed inside the casing 2 and alternately forms the passage grooves 5 and 6 through which different fluids flow, is attached to each passage groove. 5.6 is formed so that both ends in the fluid flow direction are alternately closed so that the respective passage grooves 5 and 6 open toward the same end [J], and each passage groove 5 is
, 6 groove width is maintained by a plurality of pins 21 implanted in the heat transfer wall section partitioning the grooves. . In addition, in the figure, 20 is a comb forming the heat transfer plate body 4, an element base material made of a metal plate material, a synthetic resin material, etc., and 20a and 20b are curved bent parts for folding back the terminal ends of each passage groove 5, 6. It is.

Here, the manufacturing method of the heat transfer plate body 4 when the element base material 20 is a long strip-shaped plate material made of rubber or metal plate material, etc. is shown in FIGS. 4(a), (b) and 5. To explain briefly using Fig. 4(a),
As shown in FIG. 3B, a plurality of pins 21 are inserted through the long strip-shaped plate along its longitudinal direction in a desired arrangement.

At this time, a plurality of pins 21 are planted as a group only in the portion of the long strip-shaped plate material that will become the heat transfer wall portion that partitions each passage groove 5.6, and! The arrangement of the pins 21 in each group to be closely mated is preferably such that when the pins 21 are overlapped, the pins 21 do not come into contact with each other, but are arranged in a staggered manner. Note that the arrangement of the pins 21 for each group is not limited to the illustrated example, and various modifications may be considered.

Then, the element base material 20 in which such pins 21 are planted in groups is bent in the opposite direction to the intersection f4- by the respective bending portions 20a and 20b, as shown in the fifth LΔ, It is preferable to stack the heat transfer wall portions so that they face each other while ensuring a constant groove width determined by the length of the pin 21, that is, the length of the pin 21 in contact with the side wall surface of the pin.

Note that when the element base material 20 is formed of rubber or the like, metal pins 21 etc. with high thermal conductivity are attached to the base material 20 in order to ensure thermal conductivity between the adjacent passage grooves 5 and 6.
It is best to plant it by penetrating it. In addition, in the case of using such rubber etc., with the base material 20 folded and overlapped,
As shown in Fig. 1, it can be assembled by storing it inside the casing 2, and at the time of maintenance, for example, it can be easily taken out from inside the casing 2 using its elasticity, and it can be unfolded. It is excellent in terms of workability, and this type of elastic material can ensure sealing between the grooves 5 and 6 by itself when stored in the casing z, eliminating the need to use conventional sealing materials. There is also the advantage that it can be omitted.

However, the base material 20 is not limited to this, and may be formed by appropriately bending the base material 20 of various metal plate materials including iron plates, copper plates, aluminum plates, etc. If the heat transfer wall portion can be formed of a high-quality material, the pin 21 for maintaining the above-mentioned groove width may be implanted on one side of each wall surface or on one side of each wall surface.

Furthermore, the base material 20 described in 1-1 may be made of a synthetic resin material with high thermal conductivity, and may be integrally molded as the heat transfer plate body 4 in a predetermined shape in advance. In this case, the pins 21 serving as the spacing members are inserted Modifications such as molding or integrally forming from a synthetic resin material are possible.

It should be noted that the work of planting the pins 21 on the base material 20, which is made of a continuous long strip plate material, can be easily carried out using an automatic machine using a flocking technique such as a brush, and it is possible to avoid problems such as HuI and cost. advantageous in terms of

According to such a configuration, despite the simple configuration,
There are advantages that the heat transfer plate body 4 can be constructed with a minimum number of components, and that workability during assembly and disassembly is excellent.

Furthermore, if the element base material 20 constituting the heat transfer wall portion of the heat transfer plate body 4 is made of a resilient material such as rubber or synthetic resin material, each element base material 20 can be used simply by storing it in the casing 2 and pressing it. There is also the advantage that sealing between the passage grooves 5, 6 can be performed appropriately and reliably, and a special Knoll L stage is not required.

Furthermore, in the above-mentioned configuration, the number of pins 21 facing into each passage groove 5.6 is increased.

By selecting the arrangement state thereof, there is an advantage that it is possible to provide a removing unit for removing dust and the like contained in the fluid flowing in the passage groove 5.6.

Note that the present invention is not limited to the structure of the embodiments described above, and the shape, structure, etc. of each part can be modified and changed as appropriate.
In addition, devices and devices to which it can be applied can be considered in various fields. For example, in the above-mentioned embodiments, both ends of each part 5 and 6 of the heat transfer plate body 4 in the flow direction are the inflow side of each fluid, and one side of the other end is the outflow side. However, the present invention is not limited to this, and various modifications may be made, such as allowing the fluid to flow in the opposite direction. Also, various modifications may be made to the shape of the casing 2, etc., and the attitude of attaching it to the main equipment. Needless to say, it's possible.

〔Effect of the invention〕

As described hereinafter, the heat exchanger according to the present invention includes a heat transfer plate body that alternately forms passage grooves through which different fluids flow, and a heat transfer plate body that is installed inside the body, and an inflow of each passage groove. A casing having an outlet formed on one side in the passage width direction at one end of the heat transfer plate body and the other end opposite to each other, the heat transfer plate body including:
Both ends of each passage groove in the fluid flow direction are alternately closed so that each passage groove opens toward the same end, and the width of each passage groove is adjusted to form a passage groove. Although it is a simple and inexpensive structure, it is formed by holding it with multiple pins embedded in the heat transfer wall.
The heat transfer plate body can be constructed with the minimum number of components necessary, and there are various excellent effects such as excellent workability during assembly and disassembly. Further, according to the present invention, if the heat transfer wall of the heat transfer plate body is made of a resilient material such as rubber or synthetic resin material, it is possible to connect the heat transfer wall between each passage groove by simply storing it in the casing and pressing it. It also has the advantage that it can be properly and reliably sealed and does not require any special sealing means.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view showing an embodiment of the heat exchanger according to the present invention, FIG. 2 is a schematic perspective view, FIG. 3 is a schematic side sectional view showing the heat exchanger in use, and FIG. (a), (b
) is a schematic perspective view showing an example of an element base material forming a heat transfer plate body as an element for a heat exchanger, which is the main part, and FIG. 5 explains a method for manufacturing a heat transfer plate body using this element base material. FIG. l...Heat exchanger, 2...Casing, 3...
・Equipment housing, 4... Heat transfer plate body (heat exchanger element), 5.5a; 6, 6a... Passage groove, 7.
...Air chamber for air inside the housing, 7a...Suction port, 8
... Suction fan, 9... Air outlet, 10.
...Air chamber for outside air, 10a...Intake port, 11...
...Intake fan, 12...Exhaust p, 13.14.
...Partition wall, 20...Element base material, 20a,
20b...Curved bent portion, 21...Pin.

Claims (1)

[Claims] A heat transfer plate body that alternately forms passage grooves through which different fluids flow, and this heat transfer plate body is installed inside the body, and the inflow and outlet of each of the passage grooves are connected to one end of the heat transfer plate body, respectively. The heat transfer plate body includes a casing formed on one side in the passage width direction at the other end opposite to the casing, and the heat transfer plate body is configured such that both ends in the fluid flow direction in each passage groove are alternately closed. Accordingly, each passage groove is formed to open toward the same end, and the groove width of each passage groove is maintained by a plurality of pins embedded in the heat transfer wall forming the passage groove. A heat exchanger characterized by: