JP2015048973A - Plate type heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To arrange fins 3 and fins 4 in a plurality of stages between a pair of plates 1 and 2 so that each fin 3 and fin 4 are in close contact with each other, and plate 1 and plate 2 are in close contact with each other. . SOLUTION: A fin 3 and a fin 4 are bent into a trapezoidal wave or a smooth waveform, and between the leg portions 3c and 3c and between the leg portions 4c and 4c of each wave are expanded with respect to the compressive force in the amplitude direction of the wave. It forms so that it may open, and the plate 1 and the plate 2 are brazed and fixed integrally with each other in a compressed state. [Selection] Figure 3

Description

   The present invention relates to a plate heat exchanger in which corrugated fins are interposed between a pair of plates, and the corrugated fins are arranged in a plurality of stages.

  Patent Document 1 below proposes a stacked cooler that cools a plurality of electronic components from both sides. This is a combination of a pair of upper and lower dish-shaped plates, and a pair of inner fins arranged on both sides of the inner plate through an intermediate plate. A refrigerant is circulated in the interior to cool electronic components attached to the surface of the plate. This heat exchanger is generally called a heat sink.

JP 2008-166423 A

  A water-cooled heat sink is required to be compact and have high heat conductivity. In the said patent document, in order to raise the heat-transfer area of an inner fin, the upper and lower two-stage fin is interposed via the intermediate plate. In such a heat sink, in order to further improve the heat transfer property, it is necessary to increase the fin efficiency by increasing the plate thickness of the fin.

However, when the fin thickness is increased, the workability of the fin decreases, and a defect that the dimensional accuracy cannot be accurately maintained appears. As a result, the adhesion between the fin, the intermediate plate, and the tube made of a pair of upper and lower plates is lowered, and there is a possibility that variations in liquid tightness and heat exchange performance occur. Furthermore, since the intermediate plate is disposed between the upper and lower inner fins, there is a disadvantage that the number of parts is increased by the amount of the intermediate plate. Furthermore, there exists a fault which the flow path of a refrigerant | coolant is divided into two by presence of an intermediate plate, and the distribution resistance becomes high.
Accordingly, an object of the present invention is to provide a heat exchanger in which the fin height can be easily adjusted even if the fin thickness is increased to some extent, and the brazing property with the plate is improved.

According to the present invention, the corrugated fins (3) and (4) are interposed between the flat first plate (1) and the second plate (2), respectively, and brazing between them is performed. In a fixed plate heat exchanger,
Between the first plate (1) and the second plate (2), fins (3) and (4) are stacked in multiple stages,
Each fin (3) (4) has its top (3a) (4a) and bottom (3b) (4b) alternately formed in the direction of wave travel, and a pair of legs (3c) ( 3c), (4c) (4c), the cross-section is bent into a trapezoidal wave or a smooth waveform, and a pair of legs (3c) facing the compression force (17) in the amplitude direction of the wave (3c), (4c) (4c) has a configuration in which the roots are expanded,
Each part is brazed together in a compressed state between the first plate (1) and the second plate (2), and adjacent to the wave top (3a) of one fin (3) by the compression force. The bases of the opposing legs (4c) and (4c) of the wave of the fin (4) to be inserted fit into the distance between the first plate (1) and the second plate (2). (4) A plate-type heat exchanger characterized in that the total height is forcibly matched.

The present invention described in claim 2 is the plate heat exchanger according to claim 1,
At least one of the plates (1) is formed in a dish shape, and both plates (1) and (2) are joined at their peripheral edges to form an element (5), and a first fluid ( 6) is a plate-type heat exchanger that is made up of a heat sink in which the object to be cooled (7) is attached to the outer surface side of the element (5).

The present invention described in claim 3 is the plate heat exchanger according to claim 1,
At least one of the plates (1) is formed in a dish shape, both plates (1) and (2) are joined at their peripheral edges to constitute an element (5), and a plurality of elements (5) are laminated, It is a laminated plate type heat exchanger in which the first fluid (6) and the second fluid (6a) are alternately circulated in every other element (5).

The present invention according to claim 4 is the plate heat exchanger according to claim 1,
The first plate (1) and the second plate (2) are formed in a groove shape, and both end portions of the first plate (1) and the second plate (2) expand toward the groove bottom to form a bulging portion (9). 2) is fitted to face the groove bottom to form an element (10), and each element (10) is laminated at the bulging portion (9) of each plate (1) (2) to form a core (11 ), The casing (12) is fitted on the outer periphery of the core (11), and a pair of headers (13) are fitted on both ends of the core (11),
It is a header plateless type plate heat exchanger in which a first fluid (6) flows in an element (10) and a second fluid (8) flows in a casing (12).

  In the plate heat exchanger of the present invention, fins 3 and 4 are laminated in a plurality of stages, and each of the fins 3 and 4 is bent into a trapezoidal wave or a smooth waveform and compressed in the amplitude direction of the wave. Since the base of the pair of opposing legs 3c, 3c, 4c, 4c is expanded with respect to the force 17, the parts are integrated in a compressed state between the first plate 1 and the second plate 2. At the time of brazing, the roots of the opposing legs 4c, 4c of the wave of the adjacent fin 4 are fitted into the wave top 3a of one fin 3 by the compression force, and the first plate 1 and the second plate The sum of the heights of the plurality of fins 3 and 4 is forcibly aligned with the distance between the two. As a result, the fins 3 and 4 and the fins 3 and 4 and the plates 1 and 2 are brought into close contact with each other, thereby improving the heat conductivity. At the same time, the heat transfer area can be increased by the presence of the plurality of stages of fins 3 and 4 to improve the heat exchange performance.

  When the heat sink is formed by joining the peripheral edges of the plate-shaped plate 1 to each other as a plate type heat exchanger as in the invention described in claim 2, the heat exchange performance is high and extremely compact. Thus, it is possible to provide a heat exchanger that is easy to manufacture.

  As in the third aspect of the invention, a stacked plate heat exchanger in which a plurality of elements 5 are stacked, and the first fluid 6 and the second fluid 6a alternately flow through every other element 5. In this case, heat exchange between the two fluids can be performed efficiently.

  As in the fourth aspect of the invention, the elements 10 are laminated at the bulging portions 9 of the plates 1 and 2 to form the core 11, and the casing 12 is fitted on the outer periphery of the core 11. When a pair of headers 13 are fitted on both ends of the heat exchanger 11, a heat exchanger with a small number of parts that does not require a header plate can be easily manufactured.

The disassembled perspective view of 1st Example of the plate type heat exchanger of this invention. The cross-sectional view of the same Example. The III section enlarged view of FIG. Explanatory drawing explaining the overlapping state of the fin 3 and the fin 4 of the Example. The principal part cross-sectional view of 2nd Example of the plate type heat exchanger of this invention. The disassembled perspective view of 3rd Example which applied this invention to the laminated heat exchanger. The partially exploded perspective view of 4th Example which applied this invention to the header plateless type heat exchanger.

Next, embodiments of the present invention will be described with reference to the drawings.
1 to 4 show a first embodiment of the present invention, and this heat exchanger is used as a body to be cooled 7 for a heat sink for cooling an electronic component.
In this example, a plate 2 having a flange portion at the periphery of a plate 1 formed in a dish shape and having an outer periphery aligned with the periphery is fitted with fins 3 and fins 4 fitted therein. In this example, the object to be cooled 7 is mounted on the plate 2, and the first fluid 6 flows through the plate 1 through the pair of inlet / outlet pipes 15, thereby cooling the object to be cooled 7.

  The fins 3 and 4 interposed between the plate 1 and the plate 2 are formed in a trapezoidal shape in cross section. That is, the tops 4a and the valleys 4b are alternately arranged in the wave traveling direction, and the tops 4a and the valleys 4b are connected by the pair of legs 4c. The leg portion 4c is inclined in a letter C shape. Therefore, when the fins 3 and 4 are compressed in the direction of the wave amplitude, each leg 4c moves in the direction in which the roots expand as shown by arrows as shown in FIG. Then, the top portion 3a of the fin 3 is fitted between the pair of leg portions 4c. Similarly, next to the fitting, the pair of leg portions 3c of the fin 3 expands in the direction of the arrow, and the valley portion 4b of the fin 4 is fitted therein. And each fin 3 and fin 4 are extended in the advancing direction of the wave as a whole.

At least one of the contact portions of each of the fins 3 and 4 and the plates 1 and 2 is coated or coated with a brazing material. 4 in the stacking direction. Then, in a state where the flange of the plate 1 and the peripheral edge of the plate 2 are in close contact with each other, the fins 3 and the fins 4 are fitted so as to overlap each other with an appropriate depth. The fitting amount is adjusted so that the plate 1 and the plate 2 are in close contact with each other.
Therefore, the top 4a of the fin 4 and the plate 2 and the valley 3b of the fin 3 and the plate 1 are also in close contact, and are inserted into the furnace in the close state, and the whole is integrally brazed and fixed. The

In this example, as shown in FIG. 1, a pair of inlet / outlet pipes 15 are arranged on the plate 2 side, and the first fluid 6 flows in from one of them and flows out of the other inlet / outlet pipe 15. And it distribute | circulates the inside of the plate 1 and cools the to-be-cooled body 7.
FIG. 4 shows the fitting portion 14 in the overlap state of the fin 3 and the fin 4.

Next, FIG. 5 shows a second embodiment of the present invention, and this example is different from the first embodiment in that the cross sections of the fins 3 and 4 are formed in a smooth waveform.
Even in this case, the amount of fitting between the leg portions 3c and between the leg portions 4c of the waves of the fins 3 and 4 is appropriately increased, and the amount of fitting is automatically adjusted so that the plates 1 and 2 are in close contact with each other. That is, the pair of upper and lower compression forces 17 cause the leg portions 3c to expand and the leg portions 4c to expand, and the top portion 3a is fitted between the leg portions 4c, and the trough portion 4b is between the leg portions 3c. Fit into.

FIG. 6 shows a third embodiment in which the present invention is applied to a stacked heat exchanger.
In this example, the plate 1 and the plate 2 are formed in a dish shape, and a pair of the first fluid 6 manifold and the second fluid 6a manifold are arranged at diagonal positions. In the example, fins 3 and 4 are interposed in two stages.
In the first and second embodiments, a pair of fins 3 and fins 4 are arranged. However, the present invention is not limited to this, and three or more of them may be laminated. The same applies to other embodiments described later. In the third embodiment, the first fluid 6 and the second fluid 6a circulate between the stacked plates, and heat is exchanged between the two fluids.

  Next, FIG. 7 shows a fourth embodiment in which the present invention is applied to a header plateless heat exchanger. In this example, the plate 1 and the plate 2 are formed in a groove shape, and both longitudinal end portions thereof are formed. A bulging portion 9 is provided, and a pair of fins 3 and fins 4 are interposed between the plates 1 and 2 to constitute an element. The elements are brought into contact with each other at the bulging portion 9 of each plate to constitute a core. A casing (not shown) is disposed on the outer periphery of the core, and tanks for the second fluid are attached to both ends of the core. And a 1st fluid distribute | circulates between the outer periphery of each element, and a 2nd fluid distribute | circulates in each element.

1 plate 2 plate 3 fin
3a top
3b Tanibe
3c Leg 4 Fin
4a top
4b Tanibe
4c Leg 5 Element

6 First fluid
6a Second fluid 7 Object to be cooled 8 Second fluid 9 Swelling part
10 elements
11 core
12 casing
13 Header
14 Insertion
15 Entrance / exit pipe
16 dimples
17 Compression force

Claims (4)

In a plate heat exchanger in which corrugated fins (3) and (4) are interposed between a flat first plate (1) and a second plate (2), respectively, and brazed between them,
Between the first plate (1) and the second plate (2), fins (3) and (4) are stacked in multiple stages,
Each fin (3) (4) has its top (3a) (4a) and bottom (3b) (4b) alternately formed in the direction of wave travel, and a pair of legs (3c) ( 3c), (4c) (4c), the cross-section is bent into a trapezoidal wave or a smooth waveform, and a pair of legs (3c) facing the compression force (17) in the amplitude direction of the wave (3c), (4c) (4c) has a configuration in which the roots are expanded,
Each part is brazed together in a compressed state between the first plate (1) and the second plate (2), and adjacent to the wave top (3a) of one fin (3) by the compression force. The bases of the opposing legs (4c) and (4c) of the wave of the fin (4) to be inserted fit into the distance between the first plate (1) and the second plate (2). (4) A plate heat exchanger characterized in that the total height is forcibly matched. In the plate type heat exchanger according to claim 1,
At least one of the plates (1) is formed in a dish shape, and both plates (1) and (2) are joined at their peripheral edges to form an element (5), and a first fluid ( A plate type heat exchanger comprising a heat sink in which 6) circulates and a body to be cooled (7) is attached to the outer surface side of the element. In the plate type heat exchanger according to claim 1,
At least one of the plates (1) is formed in a dish shape, both plates (1) and (2) are joined at their peripheral edges to constitute an element (5), and a plurality of elements (5) are laminated, A laminated plate heat exchanger in which the first fluid (6) and the second fluid (6a) are alternately circulated in every other element (5). In the plate type heat exchanger according to claim 1,
The first plate (1) and the second plate (2) are formed in a groove shape, and both end portions of the first plate (1) and the second plate (2) expand toward the groove bottom to form a bulging portion (9). 2) is fitted to face the groove bottom to form an element (10), and each element (10) is laminated at the bulging portion (9) of each plate (1) (2) to form a core (11 ), The casing (12) is fitted on the outer periphery of the core (11), and a pair of headers (13) are fitted on both ends of the core (11),
A header plateless plate type heat exchanger in which the first fluid (6) flows in the element (10) and the second fluid (8) flows in the casing (12).

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