JP2556050Y2 - Heat exchange fins - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger, and more particularly to a heat exchange fin used in a heat exchanger having a circular heat exchange chamber.

[0002]

2. Description of the Related Art As a heat exchanger having a circular heat exchange chamber, a heat exchanger having a so-called multi-plate type housing as described in Japanese Utility Model Application Laid-Open No. 61-96172, and a Japanese Utility Model Application No. 59-28 are used.
There is a so-called laminated housing that does not require a housing described in Japanese Patent No. 219. In each case, the peripheral edges of two parallel circular plates are closed by flanges provided on the plates, and a pair of openings are provided at symmetrical positions with respect to the center of the circle, and one of them is used as an inlet and the other is used as a heat exchanger. A chamber is formed, and a fluid flows through the chamber to exchange heat via a plate. The openings are provided on the two plates together, and the openings of the plurality of heat exchange chambers arranged in parallel are connected to form an inflow passage and an outflow passage that communicate each heat exchange chamber.

In the heat exchange chamber, turbulent flow is hindered by obstructing the flow linearly flowing from the inlet to the outlet, and the flow is deflected to spread to the periphery of the heat exchange chamber.
Corrugated heat exchange fins are provided to eliminate ineffective heat transfer surfaces on the plate and further increase the heat transfer area.

[0005]

The heat exchange fins as described above have been provided over almost the entire surface of the circular heat exchange chamber. Therefore, the resistance to the fluid is high, and the pressure loss of the fluid is large, and it is not often difficult to set a heat exchanger in which the pressure loss falls below a desired value.

[0006]

The heat exchange fin according to the present invention comprises a pair of corrugated pieces which surround the inlet and the outlet of the circular heat exchange chamber, respectively, and the two corrugated pieces are spaced from each other. The outer shape has a circular arc portion in part, and this portion is formed along the periphery of the heat exchange chamber.

[0007]

[Function] Fluid entering the heat exchange chamber from the inlet is agitated as a turbulent flow by the corrugated piece around the inlet, and the flow is deflected to the periphery of the heat exchange chamber, and the periphery of the plate. The heat exchange takes place through. In the corrugated piece around the outlet, the flow dispersed around the outlet is not short-circuited and concentrated at the outlet, but flows uniformly from around the outlet to eliminate an ineffective portion of the heat transfer surface of the plate.

In this case, the heat transfer area of the fin itself is reduced by the space at the center as compared with the case where the heat exchange fins are arranged on the entire surface in the heat exchange chamber. Since the heat is transferred to the plate instead of the direct heat transfer surface, the effect of the decrease in the heat transfer area of the fin itself is relatively small. In addition, the effect of turbulent flow and the effect of deflecting and spreading around the heat exchange chamber are remarkably exhibited mainly in the vicinity of the inlet, so that the influence of the provision of the above-mentioned interval is relatively small. . Further, since the fluid resistance is almost proportional to the area where the heat exchange fins are arranged, the arrangement area is significantly reduced and the pressure loss is remarkably reduced by providing an interval in a wide portion at the center. Therefore, the decrease in pressure loss is remarkable while the decrease in heat exchange action is suppressed to a small extent.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A heat exchange fin 1 shown in FIG. Corrugated piece 2,
2 has the same shape, and the outer shape is an arc portion 3a and a straight portion 3b
And a corrugated fin having an opening 4 substantially at the center. The shape of the corrugate is a known one as shown in FIG. 3, and a number of slit openings 6 are formed between a number of upright walls 5 arranged in a staggered manner. The upright wall 5 is parallel to the outer straight portion 3b.

The corrugated pieces 2 are mounted on a circular plate 10. The plate 10 has openings 11 and 11 near the periphery which are symmetrical with respect to the center. One is an inlet and the other is an outlet. The plate 10 is a pair of two plates, and a pair of flanges 12a and 12b (FIG. 4) are provided on the periphery, and the plates are caulked together and closed.
A heat exchange chamber 13 (FIG. 4) is formed between 0 and 10 and the heat exchange fins 1 are housed therein. The arc portion 3a of the corrugated piece 2 is located at the periphery of the heat exchange chamber, that is, the flange 12a,
The opening 4 is concentric with the opening 11 of the plate 10 so as to approach the caulked portion 2b. The two corrugated pieces 2, 2 are arranged corresponding to the openings 11, 11, and both straight portions 3b, 3b are opposed to and parallel to the center of the plate 10 with an interval d. At the center of the plate 10 is provided a hole 14 for a mounting bolt.

In the heat exchange chamber 13, the inner peripheral edge of the hole 14 of the plate 10 is closed by a seal ring 15. Each of the heat exchange chambers 13 is formed by stacking an annular spacer 16 on the outer periphery of the opening 11 and an annular spacer 17 on the outer periphery of the hole 14.
8. Outflow passage 19 is formed. The plurality of heat exchange chambers 13 stacked as described above are housed in a housing 20 having an inlet pipe and an outlet pipe for the second fluid, and
8. The outflow passage 19 is provided with a communication passage which penetrates the housing 20 and communicates with the outside. The first flow which enters from the inflow passage 18 and flows through each heat exchange chamber 13 and flows out from the outflow passage 19
The fluid is oil for lubrication, the second fluid is cooling water, and the inside of the housing 20 becomes a cooling water jacket. Thus, a multi-plate oil cooler 21 is formed.

The heat exchange fins 7 of the second embodiment shown in FIG.
Consists of two pieces, corrugated pieces 8 and 8. The corrugated shape of the corrugated piece 8 having the opening 4, the upright wall 5, and the slit opening 6 is the same as the corrugated piece 2. The outer shape of the corrugated piece 8 includes an arc portion 9a and a curved portion 9b. The arc portion 9a is slightly shorter than the arc portion 3a of the corrugated piece 2, and a convex curved portion 9b is formed by connecting both ends of the arc portion 9a.

A heat exchange chamber 35 for accommodating the heat exchange fins 7
(FIG. 5) is formed by laminating two circular plates 30 and overlapping and closing flanges 31 provided with their peripheral edges rising obliquely. Openings 32, 32 are provided in the plate 30 symmetrically with respect to the center, and the opening 4 of the corrugated piece 8 is arranged so as to be concentric with the opening 32. Both curved portions 9a, 9a face the central portion of the plate 30 with an interval. An opening 33 having a hole flange 33a is provided at a position perpendicular to the openings 32, 32, and a hole 34 for bolt attachment and a return passage is provided at the center with the hole flange 34a.

When the plates 30 are overlapped in the same direction while being shifted in the circumferential direction by 90 °, the openings 32 and the flanges 33a are connected alternately. In this manner, the heat exchange chambers 35 are formed in a layer continuous with the plate 30 in a continuous manner above and below the plate 30. The first and second fluid flow paths alternately communicate with each other every other layer by the flange 33a. Is divided into The flange 33a is coaxially overlapped with the first
A fluid inflow passage 36, an outflow passage 37, and an inflow / outflow passage (not shown) for the second fluid are formed. An upper end plate 38 and a lower end plate 39 are attached to the stacked heat exchange chambers 35, and one of the upper and lower end plates 38, 39 is provided with an opening for communicating the inflow passage 36 and the outflow passage 37 to the outside. Thus, an oil cooler 40 is formed in which the first fluid is oil and the second fluid is cooling water. Reference numeral 41 denotes an oil cover for returning oil to the return passage formed by the holes 34, and reference numeral 42 denotes a water cover serving as a passage for cooling water. Although the heat exchange fins 7 are provided only in the heat exchange chamber 35 on the oil side as shown in the figure, they can be further provided in the heat exchange chamber on the water side.

The heat exchange fins 2 and the heat exchange fins 7 have the same area and the same degree of reduction in pressure loss. The heat exchange fins 7 having less resistance are better. The external shape of the heat exchange fin is not limited by the shape of the heat exchange chamber. Curved portion 9b of heat exchange fin 7
Is not limited. Also, the shape of the corrugate is not limited to a specific one.

[0016]

The heat exchange fin of the present invention is composed of two pieces surrounding the inflow port and the outflow port of the heat exchange chamber respectively. The area of the fin is reduced at the wide portion in the center, and the action of stirring and deflecting the flow is achieved. The corrugated pieces are placed at the inlet and outlet, which work strongly, so that the pressure loss can be significantly reduced while the heat exchange effect is kept low, and the proper heat exchange according to the specifications A vessel is obtained.

[Brief description of the drawings]

FIG. 1 is a view showing an embodiment of a heat exchange fin.

FIG. 2 is a view showing a second embodiment of the heat exchange fin.

FIG. 3 is a view showing a corrugated shape of a heat exchange fin.

FIG. 4 is a diagram of a multi-plate heat exchanger in which heat exchange chambers are stacked.

FIG. 5 is a diagram of a stacked heat exchanger in which heat exchange chambers are stacked.

[Explanation of symbols]

 1,7 Heat exchange fins 2,8 Corrugated piece 4 Opening 3a, 9a Arc part 3b Linear part 9b Curve part

Claims (1)

(57) [Scope of request for utility model registration] 1. A heat exchanger which is formed by closing a peripheral edge between parallel circular plates and provided with a pair of openings at symmetrical positions with respect to the center and which is provided as an inlet and an outlet. A heat exchange fin surrounding the opening, a part of the outer shell being a pair of corrugated pieces forming an arc along the periphery of the heat exchange chamber, both corrugated pieces surrounding the inlet or outlet, and Heat exchange fins with a gap between corrugated pieces.