JPS6114439B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for dispensing two types of fluids alternately by attaching packing to every other packing groove of a plate in which packing grooves are provided between a fluid inlet/outlet hole and a distribution surface. This relates to a type of plate heat exchanger that allows flow to a distribution surface.

Generally, this type of heat exchanger is constructed by alternately laminating two types of plates such as A and B shown in FIG. The plates A and B have square fluid inlet/outlet holes 1, 2, 3, 4, and distribution surfaces 5, 6 and 7, 8 are formed facing the inlet/outlet holes, respectively. In plate A, a heat transfer surface 9 is formed between distribution surfaces 5 and 6, and in plate B, a heat transfer surface 9 is formed between distribution surfaces 5 and 6.
In this case, a heat transfer surface 10 is formed between the distribution surfaces 7, 8. 11 and 12 are packing grooves provided around the entrance and exit holes 1 to 4 and along the outer peripheries of the plates A and B, and 13a to 13d and 14a to 1
4d is a packing groove provided between the inlet/outlet holes 1-4 and the distribution surfaces 5-8. 15 and 16
is an integrated packing fitted into these packing grooves, and the packing 15 of plate A and the packing 16 of plate B are symmetrical.

In addition, the packing grooves 13c and 13d of plate A
No packing is applied to the distribution groove 5 of the distribution surface 5.
a and the protrusions 5b are arranged so as to face the inlet hole 3, and the distribution grooves 6a and the protrusions 6b of the distribution surface 6 are arranged so as to face the outlet hole 4. Similarly, packing grooves 14a and 14b of plate B are not packed.
The distribution grooves 7a and the protrusions 7b of the distribution surface 7 are arranged so as to face the outlet hole 1, and the distribution grooves 8a and the protrusions 8b of the distribution surface 8 are arranged so as to face the inlet hole 2, respectively.

In the heat exchanger having such a configuration, the fluid is distributed evenly from the inlet 3 of the plate A to the herringbone type heat transfer surface 9 through the distribution groove 5a, and
through which the fluid flows from the outlet hole 4 to the outlet hole 4 of the plate B, further merging the fluid flowing through the heat transfer surface of another plate A superimposed on the back side of the plate B,
It is discharged. In plate B, a fluid different from the above is introduced into the heat transfer surface 10 from the inlet hole 2 through the distribution groove 8a.
and is discharged from the outlet hole 1 through the distribution groove 7a. Heat exchange between the two fluids takes place on the heat transfer surfaces 9 and 10 of the A and B plates, which are alternately stacked and stacked.

However, in the conventional heat exchanger of this type, two types of A and B plates are stacked and stacked, and each packing groove 13a to 13d and 14a to 14d between each inlet/outlet hole 1 to 4 and each distribution surface 5 to 8 is has a structure as shown in Fig. 2 (the figure shows a cross section taken along the Z-Z line in Fig. 1 when plates A and B are stacked), and for example, packing 15 is installed between every other plate. Since the packing groove 13c where the packing 15 is not installed and the packing groove 14c where the packing 15 is installed are configured, when these plates A and B are tightened, a lack of strength occurs around the packing groove 13c, as shown by the broken line. There is a problem in that the through packing groove 13c deforms upward, and this deformation causes the distribution groove 5a to deform downward. The above deformation of the packing groove 13c and the distribution groove 5a reduces the sealing effect between the plates, promotes the mixing of two types of fluids, and at the same time reduces the flow resistance of the fluid, reducing the heat exchange rate. Furthermore, heat exchangers that use high-pressure fluids cannot obtain the required sealing force, and there are limitations in their use in that they can only be applied to heat exchangers that use low-pressure fluids.

Therefore, in view of the above-mentioned drawbacks of the conventional plate heat exchanger, the present invention provides a protrusion between the packing groove on the side where the packing is installed and the distribution groove on the distribution surface closest to the packing groove. A concave portion is formed in the strip portion, and the concave portion overlaps with the protrusion portion of the distributing surface of the plate on the side where the packing that overlaps with the bottom surface of the plate is not attached, and the concave portions are connected to each other at a position intermediate between the bottom surface of the concave portion and the protrusion portion. By forming a communicating passage (recess), deformation of the area around the plate groove on the side where the packing is not attached is prevented.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described below with reference to embodiments shown in the drawings.

In FIGS. 3 to 5, 17 is plate B.
This packing groove 14c and this packing groove 14
The protrusion 17 is provided between the distribution groove 7a of the distribution surface 7 closest to the plate B
A recess 18 that overlaps with the protrusion 5b of the distribution surface 5 of the plate A superposed on the lower surface, and a recess 1 located between the bottom 18a of the recess 18 and the protrusion 17.
A passage (recess) 19 is provided that communicates the two. In addition, in the present invention, the packing groove 13c of the plate A on the side where the packing 15 is not attached is
No protrusion 17 is formed between the distribution surface 5 and the distribution surface 5. Further, the member that holds the packing 16 on the opposite side of the side wall 17a of the protrusion 17 is the end surface 20a of the protrusion 20 provided between the inlet hole 3 and the packing groove 13c, and the member that holds the packing 16 on the side opposite to the side wall 17a of the protrusion 17 is an end face 20a of the protrusion 20 provided between the inlet hole 3 and the packing groove 13c. It is continuous. A liquid passage groove 21 which is a flat surface formed by providing this protrusion 20
is superimposed on the protrusion 22 of plate A which is superimposed on the lower surface of plate B, and the protrusion 20 is superimposed on the lower surface of plate B.
The liquid is superimposed on the liquid passage groove 23 of the plate A, which is superimposed on the upper surface of the plate A.

FIG. 4 is a sectional view taken along the line X--X in FIG. 3 when plates A and B having the above structure are laminated together. As is clear from the figure, the point supporting the periphery of the packing 16 on the side of the plate B on which the packing 16 is attached with the above configuration is the liquid passage groove on the lower surface side of the plate B on the inlet hole 3 (not shown) side. The bottom surface 21a of the recess 18 provided in the protrusion 17 on the distribution groove 7a side of the plate B and the distribution surface 5 of the plate A overlap and support the bottom surface 21a of the plate B and the protrusion 22 of the plate A on the lower surface. Since the protrusions 5b overlap and support, the distance between both fulcrums can be significantly shortened compared to the conventional case shown in FIG. 2, and the strength of the lower surface side member around the packing 16 can be increased. . Further, on the upper surface side of plate B, the liquid passage groove 23 of plate A, the packing groove 13c, and the distribution groove 5a of the distribution surface 5 form a continuous plane, and the liquid passage groove 23 is connected to the protrusion of plate B. 20 to support a part of the periphery of the packing 16, and the distribution groove 5a overlaps at two points with the protrusion 17 between the packing groove 14c of the plate B and the distribution groove 7a of the distribution surface 7 closest thereto. As a result, the surrounding members of the packing 16 will be supported at three points, and the distance between the two support points on both sides of the packing 16 will be significantly shortened, just like on the bottom side, so the strength will be increased on the top side as well. It is becoming.

Therefore, the plate heat exchanger of the present invention is excellent in reinforcing and preventing deformation of the members surrounding the packing 16, and enables strong fastening of the plates A and B, and exhibits an excellent sealing effect. This can also be applied to heat exchangers that use high-pressure fluid, and can extend their service life.

By the way, the fluid in the heat exchanger of the present invention is
In plate A, as shown by A in FIG. 4, the liquid flows from the inlet hole 3 (not shown) on the left side in the figure to the right side through the liquid passage groove 23, packing groove 13c, and distribution groove 5a that form a continuous plane. In the plate B to which the packing 16 is attached, a fluid different from the fluid flowing in the plate A flows through the distribution groove 7a in a direction perpendicular to the plane of the paper. FIG. 5 is a sectional view taken along the line Y--Y in FIG. 4, and only the side wall 17b of the protrusion 7 of the plate B is shown. And this fifth
In the figure, the fluid flowing through plate B flows from the right side to the left side as shown in (b) of the figure, and in the middle of the flow, a flow path 5c formed by a protrusion 5b of plate A overlaps with the upper surface side of plate B. through side wall 1
It also flows into the recess 18 beyond 7b. The fluid flows through a passage (recess) 19 that communicates each recess 18 as shown by the chain line D, and is provided with protrusions so that the fluid does not stagnate within each recess 18 and dust contained in the fluid does not accumulate in the recess 18. Near the end of section 17, it merges with flow B and flows out.

As explained above, the present invention has a plate in which a packing groove is provided between a fluid inlet/outlet hole and a distribution surface, and a packing is attached to every other packing groove to alternately supply two types of fluids to the distribution surface. In a circulating type plate heat exchanger, a continuous and uniform height along the packing groove between the packing groove of the plate on the side where the packing is installed and the distribution groove of the distribution surface closest to this, In addition, a protrusion whose width is widened toward the distribution groove side is provided, and the packing that overlaps the lower surface of the plate is provided at the center of the upper surface of the protrusion in the width direction, and is in contact with the protrusion on the distribution surface of the plate on the side where the packing is not attached. Since the concave portions that overlap each other are formed in a row at approximately equal intervals in the direction along the packing groove, and the concave passages that communicate the respective concave portions are formed in the protruding portion, when the plates are overlapped and tightened, the plate is attached to the packing groove. The packing does not protrude from the protrusion toward the distribution surface, and the protrusion facing the packing groove is continuously formed at a uniform height to protect the packing. There is less contact with fluid, which has the advantage of reducing erosion.

In addition, by forming a recess in the widthwise center of the upper surface of the protrusion, it is possible to prevent the packing from popping out to the distribution surface side, while also allowing the packing to be placed near the packing groove of the plate on the side where the packing is attached. At the same time, the strength near the packing groove of the plate on the side where packing is not attached can also be improved by the abutment of the recess.

Furthermore, by communicating the recesses through the recessed passages, it is possible to prevent fluid from stagnation in each recess. Therefore, it has excellent reinforcement measures and deformation prevention around the packing grooves, enables strong connection of each plate that is laminated by polymerization, exhibits an excellent sealing effect, and can also be applied to heat exchangers that use high-pressure fluid. At the same time, it is possible to extend the service life.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view showing a conventional plate of this type, FIG. 2 is a cross-sectional view taken along the Z-Z line, FIG. 3 is a schematic plan view showing main parts of the plate according to the present invention, and FIG.
The figure is a cross-sectional view taken along the line X-X, and Figure 5 is the Y-X line in Figure 4.
It is a sectional view taken along the Y line. 1, 4... Fluid outlet hole, 2, 3... Fluid inlet hole, 5, 6, 7, 8... Distribution surface, 12, 13a, 1
3b, 13c, 13d, 14a, 14b, 14
c, 14d... Packing groove, 15, 16... Packing, 17... Projection, 17a... Bottom surface, 18... Recessed part, 19... Passage (recessed part), A, B... Plate.

Claims (1)

[Claims] 1. A type of plate heat exchanger in which two types of fluids are alternately distributed to the distribution surface by installing packing grooves on every other plate in which packing grooves are provided between the fluid inlet/outlet holes and the distribution surface. In the device, between the packing groove of the plate on which the packing is installed and the distribution groove of the distribution surface closest to this, there is a continuous and uniform height along the packing groove, and the width is widened toward the distribution groove side. A concave portion is provided in the widthwise center of the upper surface of this protrusion, and a concave portion that overlaps with the protrusion on the distributing surface of the plate on the side where the packing is not attached is formed in the packing groove. 1. A plate heat exchanger characterized in that concave passages are formed in the protrusions in a row at approximately equal intervals in the longitudinal direction and communicate with each other.