JPH07260386A - Plate type heat exchanger - Google Patents

Abstract

PURPOSE:To prevent the extension change of beads, control the decrease of pressure-proof performance and use a heat exchanger with high pressure by forming reinforcing grooves continuously extending in the direction perpendicular to and intersecting the beads on the heat transfer surface of a waveform shaped plate on which the beads are provided in parallel. CONSTITUTION:A plate 6 made of a rectangular metal plate comprises openings 2 as inlets/outlets of a fluid at four corner parts of the plate and a waveform shaped heat transfer surface 4 on which herring bone beads 3 falling slantwise to both sides from a center line are provided in parallel in an intermediate part. Gaskets 5 through which the openings 2 communicate with the heat transfer surface 4 or are interrupted therefrom are alternately rotated. That is, they are vertically reversed and laminated. Thus, a plate type heat exchanger is constructed. In this case, on the heat transfer surface 4 of the plate 6, reinforcing grooves 7 extending perpendicularly to and intersecting the beads 3 are formed throughout the entire length in the horizontal direction of the heat transfer surface 4. Thus, the extension change of the beads 3 in their perpendicular direction is prevented, so that the decrease of pressure-proof performance is controlled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate heat exchanger formed by laminating a plurality of plates.

[0002]

2. Description of the Related Art Generally, a plate heat exchanger is formed by stacking a plurality of plates to form a plurality of flow paths between the plates, and alternately flowing different kinds of fluids in these flow paths. The heat is exchanged through the plate.

FIG. 6 shows a herringbone type plate (1) used in a plate heat exchanger. This plate (1) has openings (2) at the four corners of a rectangular metal plate that serve as fluid inlets and outlets, and a herringbone-shaped bead (in the middle part) that can descend from the longitudinal centerline of the plate toward both sides. 3) are installed in parallel to form a corrugated heat transfer surface (4), and the upper and lower openings (2) of one side communicate with the heat transfer surface (4) and the upper and lower openings of the other side. A gasket (5) made of a heat-resistant elastic material such as synthetic rubber is attached so that (2) does not communicate with the heat transfer surface (4), and this is alternately rotated by 180 ° on a plane, That is, the plate-type heat exchanger is formed by turning it upside down and sequentially stacking the layers.

The plate (1) is, as described above,
The heat transfer surface (4) is formed in a corrugated shape by mounting the herringbone beads (3) in parallel, thereby improving the heat transfer performance during heat exchange and alternately inverting and vertically stacking. Heat transfer surface (4) of the adjacent plate (1) when
The beads (3) formed in the above are brought into contact with each other in an intersecting state so as to improve the pressure resistance.

[0005]

By the way, the heat transfer surface (4) of the plate (1) used in the plate heat exchanger is
Since the herringbone beads (3) are installed in parallel to form a wave shape, the pressure (P) to the heat transfer surface (4)
Affects the orthogonal direction of the bead (3) as shown in FIG. Therefore, when it is used at a large pressure, a slight extension deformation occurs in the direction orthogonal to the bead (3), and a large number of beads (3) are mounted on the entire plate (1). Small elongation deformation is accumulated and becomes a large elongation deformation. Therefore, a large elongation deformation occurs in the heat transfer surface (4) of the plate (1) in the direction orthogonal to the beads (3). Therefore, when the plates (1) are alternately turned upside down and sequentially laminated, it is not possible to secure a contact point (support point) between the plates due to different stretch deformation portions, and pressure resistance performance due to displacement of the gasket seal surface, etc. Inevitable decline. In order to deal with this, there is a problem that the plate heat exchanger must be used at a small pressure within a range in which the bead (3) of the plate (1) is not stretched and deformed.

The present invention has been proposed in view of the above problems, and it is an object of the present invention to provide a plate heat exchanger which can be used at a large pressure while avoiding deterioration of pressure resistance performance.

[0007]

In order to achieve the above object, the present invention has the above-mentioned bead on the heat transfer surface of a plate having a corrugated heat transfer surface formed by arranging herringbone beads in parallel. A reinforcing groove is provided continuously across the bead in a direction substantially orthogonal to the above.

[Action]

Since the reinforcing groove is provided on the heat transfer surface of the plate so as to cross the bead continuously in a direction substantially orthogonal to the bead, the reinforcing groove prevents the bead from changing in the orthogonal direction, and the plate as a whole is prevented. The amount of change in elongation in the direction orthogonal to the bead can be suppressed to be small.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the plate heat exchanger according to the present invention will be described below with reference to FIGS. The same parts as those shown in FIG. 6 are designated by the same reference numerals and the description thereof will be omitted.

1 and 2 show one embodiment of the plate heat exchanger according to the present invention, and FIG. 1 shows a plan view of a plate (6) used in the plate heat exchanger of the present invention. 2 is an enlarged sectional view of the plate (6) taken along the line AA in FIG.

In the plate heat exchanger of the present invention, as shown in FIG. 1, beads (3) are continuously formed on the heat transfer surface (4) of the plate (6) in a direction orthogonal to the beads (3). The transverse reinforcing grooves (7) are installed in series over the entire length of the heat transfer surface (4) in the lateral direction. The reinforcing grooves (7) prevent the beads (3) from being deformed in the orthogonal direction by pressure. It hardly happens.

In the plate heat exchanger of the present invention,
Reinforcing groove (7) that crosses the bead (3) continuously in the direction orthogonal to the bead (3) on the heat transfer surface (4) of the plate (6).
Since the reinforcing groove (7) hardly expands and deforms in the direction orthogonal to the bead (3) due to the pressure, when the reinforcing deformation (7) hardly expands and deforms in the direction orthogonal to the bead (3) due to the pressure. (2) is prevented from extending and deforming in the orthogonal direction by the reinforcing groove (7), so that the bead (3) does not easily extend and deform in the orthogonal direction. Therefore, even when used under a large pressure, the amount of extension deformation of the plate (6) in the direction orthogonal to the bead (3) is small, so that the contact points between the plates can be secured and the gasket seal surface is displaced. It is also possible to prevent the deterioration of pressure resistance performance. Therefore, it is possible to use the plate heat exchanger at a large pressure.

In the above embodiment, the reinforcing groove (7) is continuously provided in the lateral direction of the heat transfer surface (4), but the present invention is not limited to this, and the reinforcing groove (7) is partially provided. May be installed as desired. Further, as shown in FIG. 1, the reinforcing grooves (7) are set in two rows, but the present invention is not limited to this, and may be set in a plurality of rows other than two rows or in a single row. . Further, as shown in FIG. 2, the depth of the reinforcing groove (7) is set to be the same as the height of the bead (3), but the present invention is not limited to this and the depth of the bead (3) can be set. It can be set arbitrarily. For example, FIG. 3 shows a case where the depth of the reinforcing groove (7) is set to about ½ of the height of the bead (3).

FIG. 4 is a plan view of a plate (8) used in a plate heat exchanger according to another embodiment of the present invention, in which a bead is attached to a heat transfer surface (4) of the plate (8). Beads that are partially continuous in the direction orthogonal to (3) (3)
A plurality of reinforcing grooves (9) traversing the heat transfer surface (4) are arranged in the lateral direction of the heat transfer surface (4), and the reinforcing grooves (9) prevent extensional deformation of the bead (3) in the orthogonal direction. This is to prevent the plate (8) as a whole from extending and deforming in a direction orthogonal to the beads (3).

In this embodiment, the plurality of reinforcing grooves (9) arranged in the lateral direction of the heat transfer surface (4) are set in two stages, but the present invention is not limited to this. It is also possible to set a plurality of stages other than two and a single stage. Further, the depth of the reinforcing groove (9) can be arbitrarily set within the range of the height of the bead (3).

FIG. 5 is a plan view of a plate (10) used in a plate heat exchanger of another embodiment, which is arranged horizontally on the heat transfer surface (4) of the plate (10). The reinforcing groove (11) continuously crossing the bead (3) is installed in series over the entire length of the heat transfer surface (4) in the lateral direction, and the bead (3) extends and deforms in the orthogonal direction. The reinforcement groove (1
1) to prevent the plate (10) as a whole from stretching and deforming in a direction orthogonal to the beads (3). In the present embodiment, the orthogonality of the reinforcing groove (11) with the bead (3) is worse than that of the embodiment shown in FIGS. 1 to 4, and therefore the orthogonal direction of the bead (3) of the reinforcing groove (11). Although the effect of preventing elongation change is slightly inferior, the mold can be easily processed and the manufacturing cost can be kept low.

In the present embodiment, the reinforcing groove (11) is continuously provided in the lateral direction of the heat transfer surface (4), but the present invention is not limited to this, and the reinforcing groove (11) is partially provided. May be installed as desired.
Further, although the reinforcing groove (11) is set in two rows, the invention is not limited to this, and it may be set in a plurality of rows other than two rows or a single row. Further, the depth of the reinforcing groove (11) can be arbitrarily set within the range of the height of the bead (3).

[0018]

As described above, according to the present invention, the heat transfer surface of the plate having the heat transfer surface formed by arranging the herringbone beads in parallel to each other is substantially orthogonal to the bead. Since a reinforcing groove that crosses the bead continuously in the direction is installed, the change in the extension of the bead in the orthogonal direction is prevented by the reinforcing groove, so that the plate as a whole is orthogonal to the bead even when used with a large pressure. The amount of change in elongation in the direction is very small, so that the contact points between the plates can be secured and the gasket seal surface can be prevented from shifting so that the pressure resistance can be prevented from decreasing and heat exchange can be performed without any trouble. be able to.

[Brief description of drawings]

FIG. 1 shows a plan view of a plate used in a plate heat exchanger of the present invention.

FIG. 2 shows an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 3 shows a modification of the depth of the reinforcing groove in FIG.

FIG. 4 shows a plan view of a plate used in a plate heat exchanger according to another embodiment of the present invention.

FIG. 5 shows a plan view of a plate used in a plate heat exchanger according to still another embodiment of the present invention.

FIG. 6 shows a plan view of a plate used in a conventional plate heat exchanger.

7 shows an enlarged cross-sectional view taken along the line BB of FIG.

[Explanation of symbols]

 2 Opening 3 Beat 4 Heat transfer surface 5 Gasket 6 Plate 7 Reinforcing groove 8 Plate 9 Reinforcing groove 10 Plate 11 Reinforcing groove

Claims (4)

[Claims] 1. A plate-type heat exchanger in which herringbone-shaped beads are installed in parallel and plates having wave-shaped heat transfer surfaces are alternately turned upside down and laminated. A plate-type heat exchanger characterized in that a reinforcing groove is provided on the surface so as to cross the bead continuously in a direction substantially orthogonal to the bead. 2. A plate-type heat exchanger in which plates having heat transfer surfaces formed in a corrugated shape by mounting herringbone-shaped beads in parallel are alternately turned upside down and stacked, and the heat transfer of the plates is performed. On the surface, a reinforcing groove that crosses the bead partially continuously in a direction substantially orthogonal to the bead,
A plate heat exchanger characterized in that the plate heat exchanger is installed laterally on the heat transfer surface. 3. The plate heat exchanger according to claim 1, wherein the reinforcing grooves are continuously installed in a single row or a plurality of rows over the entire length of the heat transfer surface in the lateral direction. 4. The plate heat exchanger according to claim 1, wherein the reinforcing grooves are partially and continuously provided in a lateral direction of the heat transfer surface in a single row or a plurality of rows.