JP3328329B2 - Plate heat exchanger plate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate for a plate-type heat exchanger, and more particularly, to a shape of a weir located between a passage hole formed in a plate and a heat transfer surface.

[0002]

2. Description of the Related Art Plates used in plate heat exchangers
(1) generally comprises a rectangular flat plate, as shown in FIG. 6, having a corrugated heat transfer surface (2) on its surface,
Four corners are provided with first to fourth passage holes (3a) (3b) (3c) (3d).

[0003] Each passage hole (3a) (3b) on the plate (1).
(3c) In the part surrounding the periphery of (3d) and the periphery of the heat transfer surface (2),
A gasket groove (4) for mounting a gasket is provided, and by mounting a gasket (5) in the gasket groove (4), a plate (1a) in FIG. 7 is formed.

FIG. 8 shows a plate (1b) obtained by inverting the plate (1a) by 180 ° on a plane.

When the plate heat exchanger is formed, the plate (1a) of FIG. 7 and the plate (1b) of FIG. 8 are alternately laminated, and the first flow path and the second flow path are formed alternately. To form a plate heat exchanger.

[0006] By supplying two kinds of fluids to the first and second flow paths of the plate heat exchanger, heat is exchanged between the two kinds of fluids.

[0007]

As described above, the plate (1) used in the plate heat exchanger has a heat transfer surface (2) having a corrugated plate shape to improve heat transfer performance during heat exchange. At the same time, as shown in FIGS. 9 and 10, the passage holes (3a) (3
b) Ridges (8) are also formed on the weirs (6) (7) located between (3c) (3d) and the heat transfer surface (2) to improve the pressure resistance of this part. As a result, the plate (1) as a whole is improved in pressure resistance and heat transfer performance.

However, as described above, plate 4 (1)
When the ridge-shaped projections (8) are formed on all of the four weirs (6) and (7) located on the side, the passage communicating with the heat transfer surface (2) among the weirs (6) and (7) Ridges provided on the weir (7) corresponding to the holes (3b) (3d)
There is a problem that (8) increases the flow resistance (pressure loss) of the liquid and causes the performance of the plate heat exchanger to deteriorate.

That is, ridge-like projections (8) formed on the plate (1)
The shape of the plate (1) is pressed to a molding height that is substantially in contact with the adjacent plate (1) in a state where the plates (1) in the stacked state are tightened, and the weir (6) of each plate (1) is ) (7)
The ridge-shaped projections (8) receive the pressure applied to the ridges.

Therefore, when the plates (1) are stacked, the ridge-like projections (8) provided on the weir (7) are connected to the passage holes (3b) (3d) and the heat transfer surface.
There was a problem that the flow of liquid between (2) was obstructed and the heat transfer performance was reduced.

[0011]

SUMMARY OF THE INVENTION The present invention relates to the above-mentioned conventional technology.
In order to improve and remove points, there is a heat transfer surface in the center and four corners
A passage hole is provided between the heat transfer surface and the passage hole.
Ridges on the weir to improve pressure resistance
In the rate type heat exchange plate, it communicates with the heat transfer surface.
Two weirs located between the two passage holes,
Any part of one of the weirs may be
Ridges with a molding height that does not come into contact with
Any part of the weir is interrupted by the formation of ridges
And the other part of the weir is almost in contact with the adjacent plate.
A ridge-shaped protrusion having a molding height to be touched is formed.

[0012]

SUMMARY OF THE INVENTION Among the passage holes formed at the four corners of a plate heat exchanger plate, two weirs located between the two passage holes communicating with the heat transfer surface and the heat transfer surface. Or in one of these,

[0013]

[0014]

As described above, the molding height of the ridge-like projection formed at an arbitrary portion of the weir is reduced, or the formation of the ridge-like projection is interrupted at an arbitrary portion of the weir to make it flat. Accordingly, without lowering the pressure resistance of the weir portion located between the passage hole and the heat transfer surface, reducing the flow resistance of the liquid flowing therebetween
It is those that.

[0015]

1 and 2 show a plate (20) according to the present invention.
1 shows a main part of the first embodiment.

In FIG. 1, (21) is a heat transfer surface of the plate (20), and (22) is a heat transfer surface (2) of passage holes formed at four corners.
A passage hole communicating with 1), (23) is a gasket groove, and (24) is a gasket fitted in the gasket groove (23).

(25) Of the weirs located between each passage hole and the heat transfer surface, a weir connected to the passage hole (22) communicating with the heat transfer surface (21).

The formation of the ridge-like projections (26) on the weir portion (25) is similar to the conventional one only in the weir portion peripheral portion (25a) adjacent to the gasket groove (23) located on the outer periphery of the weir portion. , Molding height,
Ridges (2
6), and the center of the weir (2) away from the gasket groove (23)
5b) does not have ridge-shaped protrusions (26), and this weir portion central portion (25b)
Is designed to be a flat part.

In the plate (20), the heat transfer surface (2
A ridge-like projection similar to the conventional one is formed in a weir portion (not shown) connected to a passage hole (not shown) not communicating with 1).

In use of the plate (20) having the above structure, the weir (25) is pushed by the pressure of the medium by the fluid flowing through each plate (20a), but the plate (20b)
The weir portion (25) has a ridge-like projection (26) formed as before,
Since the weir (25) is supported by the continuous ridge (26), the pressure resistance of the weir (25) is reduced even if the ridge-shaped projection (26) is not formed at the center of the weir (25b). Never.

Since no liquid flows on the back surface of the weir (25b), the weir (25b) is not pushed from the back.

If the central portion (25b) of the weir portion is flat, the flow resistance (pressure loss) of the liquid flowing between the passage hole (22) and the heat transfer surface (21) can be reduced without reducing the pressure resistance. Ridge) provided on the weir (25), since
(26) It is possible to prevent the performance of the plate heat exchanger from deteriorating.

FIGS. 3 and 4 show a plate (2) according to the present invention.
(0) shows a second embodiment.

In this embodiment, the peripheral portion (25a) and the central portion (25b) of the weir portion (25) connected to the passage hole (22) communicating with the heat transfer surface (21).
And ridge-like projections (26a) and (26b) are separately formed.

The ridge-like projections (26a) formed on the periphery (25a) of the weir are formed in the same manner as in the prior art so that the molding height is set to a height substantially in contact with the adjacent plate, and the center of the weir (25b) By setting the molding height of the ridge-like projections (26b) to be approximately half the molding height of the ridge-like projections (25a), the passage hole (22) and the heat transfer surface
The rigidity of the weir portion (25) is increased while reducing the flow resistance of the liquid between (21).

FIG. 5 shows a third embodiment of the plate (20) according to the present invention.
FIG.

In this embodiment, only the portion located on the inner side of the plate (22) in the central portion (25b) of the weir portion connected to the passage hole (22) communicating with the heat transfer surface (21) is made flat. On other portions, ridge-shaped projections (26) whose molding height is substantially equal to an adjacent plate are formed.

That is, in the third embodiment, the central portion of the weir (2
Of 5b), only the part located on the inner side of the plate where the liquid is to flow positively is made flat, and the ridge-like projections (2
By providing 6), both the improvement of the pressure resistance of the weir portion (25) and the improvement of the flow dispersion effect due to the reduction of the pressure loss during the liquid flow are achieved.

Further, as in the second embodiment, a ridge-like projection approximately half the molding height may be provided at the center (25b) of the weir section.

The above description has been made with reference to the two dams located between the two passage holes and the heat transfer surface.
The same effect can be obtained by applying the present invention to only one of the two dams.

[0031]

As explained above, according to the present invention, the central portion
Having a heat transfer surface, having passage holes at four corners, the heat transfer surface and
To improve the pressure resistance of the weir located between the passage hole
Plate type heat exchange plate with ridges
Between the heat transfer surface and the two passage holes communicating with the heat transfer surface.
Two weirs, or any part of one of these weirs
Ridges of molding height that do not contact adjacent plates
Ridges or ridges on any part of the weir
Interrupts the formation of a flat surface, next to the rest of the weir
Forming ridges of molding height almost in contact with the contacting plate
Since the, without lowering the pressure resistance of the weir, in which it possible to suppress the flow resistance at the time of the liquid flow.

[0032]

Therefore, if a plate heat exchanger is formed using the plate according to the present invention, a high-performance plate heat exchanger can be formed.

[Brief description of the drawings]

FIG. 1 is a plan view showing a main part of a first embodiment of a plate according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a plan view showing a main part of a second embodiment of the plate according to the present invention.

FIG. 4 is a sectional view taken along line BB of FIG. 3;

FIG. 5 is a plan view showing a main part of a third embodiment of the plate according to the present invention.

FIG. 6 is a plan view showing a conventional example of a plate.

FIG. 7 is a plan view showing a state where a gasket is mounted on the plate.

FIG. 8 is a plan view showing a state where a gasket is mounted on the plate.

FIG. 9 is a plan view showing a weir portion of a conventional plate.

FIG. 10 is a plan view showing a weir portion of a conventional plate.

[Explanation of symbols]

 Reference Signs List 20 Plate 21 Heat transfer surface 22 Passage hole 25 Weir 25a Peripheral part 25b Weir central 26 26 Ridge projection 26a Ridge projection 26b Ridge projection

Claims (3)

(57) [Claims] 1. A heat transfer surface at a center portion, and passage holes at four corners.
Having a weir located between the heat transfer surface and the passage hole.
Plate type with ridge-shaped protrusions to improve pressure resistance
In the heat exchange plate, 2 plates located between the heat transfer surface and two passage holes communicating with each other.
One of the dam portion, or to any portion of one dam portion of which, or to form adjacent plates and non molded height of ridge-shaped projections contact the, or any part of the ridge-like projection of the weir
A plate for a plate-type heat exchanger, wherein a ridge-like projection having a molding height substantially in contact with an adjacent plate is formed on another portion of the weir portion by interrupting the formation to a flat surface. 2. A ridge-like projection having a molding height substantially in contact with an adjacent plate is formed in a peripheral portion of a weir portion adjacent to a gasket groove surrounding an outer periphery of the weir portion, and a central portion distant from the gasket groove. 2. The plate for a plate-type heat exchanger according to claim 1 , wherein formation of the ridge-shaped projections is interrupted . 3. A ridge-like projection having a molding height substantially in contact with an adjacent plate is formed in a peripheral portion of the weir portion adjacent to the gasket groove surrounding the outer periphery of the weir portion, and a central portion distant from the gasket groove. 2. The plate for a plate-type heat exchanger according to claim 1, wherein a ridge having a middle height lower than the ridge is formed.