JPH04139388A - Plate type heat exchanger - Google Patents

Abstract

PURPOSE:To enable a heat transfer plate to be manufactured using a single press die by a method wherein supporting surfaces for a gasket are positioned at a central part of a molding depth of the heat transfer plate and at least two plate-space holding beads are fixed to a non-symmetrical position on a heat transfer surface. CONSTITUTION:Supporting surfaces 14 and 15 for a gasket 13 in each of heat transfer plates 10 are arranged at a position of 1/2 of a molding depth H of the heat transfer plate 10 Plate-space holding beads 16 having a higher height size than that of a corrugated part 11 for generating turbulent flow are fixed at non-symmetrical positions as viewed from a direction of width W of the heat transfer plate 10 on each of heat transfer surfaces 12. For example, two plate-space holding beads 16A and 16B having a higher projecting height than that of a corrugated member 11 for generating a turbulent flow are fixed at each of positions l1, l2 as measured from a center C2 in a width direction spaced apart by 1/2W only from a side end of the heat transfer plate 10. A plurality of heat transfer plates 10 are piled up under a presence of the gasket 13 to form a plate type heat exchanger.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a plate heat exchanger, and in particular, it is used for a heat exchange medium with high viscosity or a heat exchange medium with a high solid content that is easily clogged. This invention relates to improvements to plate heat exchangers.

[Prior Art] A plate heat exchanger in which a plurality of heat transfer plates are stacked one on top of the other with a gasket interposed is commercially available. for example,
Japanese Patent Publication No. 63-501030 discloses that when heating or cooling a highly viscous heat exchange medium or a heat exchange medium containing a large amount of solid content, a decrease in fluidity on the heat transfer surface or In order to prevent clogging of solids, such as fibers, a heat transfer plate has been proposed that is provided with a spacing means consisting of a plurality of ribs arranged in alignment on a heat transfer surface. This heat transfer plate is formed by press working, and the seventh
As shown in Figures A and B, there is a liquid passage port (3A) in the corner of the heat transfer plate (LA) (IB), which is rectangular as a whole.
(3B) (3C) (3D) and a bead (4A) for spacing on the heat transfer surface (2A) of one heat transfer plate, for example (IA), extending between these liquid passage ports. 4B) (4C) (40) are fixedly installed in an aligned state. In the same figure, (5A)
(5B) is a bead for generating turbulence, (6A) (6B)
(6C) is the gas port attached to the periphery of the heat transfer plate (1M) (1B), and (6C) is the liquid passage port (3A).
(3B) (3C) (3D) Heat transfer plate (I
A) An annular gasket is attached to each piece of (IB) for the purpose of holding it at an interrupting force. The above heat transfer plate (
As shown in Figure 8, LA> (1B) is constructed into a plate heat exchanger by stacking a plurality of heat exchangers with gaskens (6A) and (6B) interposed at their peripheral edges. .

[RHE to be Solved by the Invention In the conventional system illustrated in FIGS. 7 and 8, the spacing maintenance nohi)' (4A) (4B) r4c)
(4D) a Alternately stacking heat transfer plates (IA) equipped with beads (5A) for generating turbulence and heat transfer plates (IB) equipped only with beads (5B) for generating turbulence. Since a plate heat exchanger is constructed, two types of press molds are required when pressing the heat transfer plates (LA) (IB). For this reason, the manufacturing cost of press molds is high (and productivity decreases due to mold replacement during press processing.In addition, individual heat transfer plates)
(IA) (IB) A different am gas Kent (6^) (6B) must be used, which not only increases costs but also complicates the manufacturing process of the plate heat exchanger. Further beads (4A) (4B)
(4C) L:4D) Although one plate interval can be increased, the other plate interval cannot be increased. Therefore, if both the high temperature medium and the low temperature medium have high viscosity or are liquids with a high solid content, this plate heat exchanger cannot be used.

[Means to solve the problem]

As a means for solving the above problems, the present invention provides a plate heat exchanger constructed by stacking a plurality of heat transfer plates each having a corrugated portion for generating turbulence on the heat transfer surface via a gasket. , the supporting surface of the gasket provided at the peripheral edge of the heat transfer surface is located at the center of the molding depth of the heat transfer plate, and is asymmetrical on the heat transfer surface when viewed from the width direction of the heat transfer plate. At least two beads for maintaining plate spacing having a height greater than the corrugated portion for generating turbulence are fixedly installed at the position of *fl.
l! This provides a plate-type heat exchanger mi.

[Effect]

Place the support surface of the gas 17-4 provided on the peripheral edge of the heat transfer surface at the center of the molding depth of the heat transfer plate. At the same time, a bead for maintaining plate spacing having a height larger than the turbulence generation waveform part is fixed on the heat transfer surface at an asymmetrical position when viewed from the width direction of the heat transfer plate. By turning every other heat transfer plate upside down and stacking them in this state, equal flow path intervals are set between all the heat transfer plates. In addition, by turning every other heat transfer plate upside down around an axis parallel to the plane of the paper and stacking them in this state, wide and narrow channel spacing is alternately created between opposing heat transfer plates. is set to

〔Example〕

Hereinafter, the present invention will be explained in detail based on FIGS. 1 to 6. In these drawings, (1o) is a heat transfer plate, (11) is a turbulence generating corrugated portion (13) formed on a heat transfer surface (12) of a heat transfer plate (10), and a heat transfer surface ( 1
2), (17) indicates the liquid passage port. In each heat transfer plate (to),
As shown in FIG. 2, the support surfaces (I4) and (I5) of the gasket (I3) are provided at 1/2 of the molding depth H) of the heat transfer plate (10). Also, the convergence (W) of the heat transfer plate (10) on each heat transfer surface (12)
In the specific example shown in FIG. 2, a bead C16) for maintaining plate spacing having a height dimension larger than the turbulent flow generating waveform part (11) is fixed at an asymmetrical position when viewed from the direction. Heat Transfer Plate) Measured from the width direction center (C2) 1/2W away from the side edge of (10), respectively (e,
) (e, ), two plate spacing beads (
16A) (16B) are fixedly installed.

A blade heat exchanger is formed by stacking a plurality of the heat transfer plates (10) with a gasket (13) interposed therebetween. Multiple heat transfer plates (1
0) If you want to set equal flow path spacing between the two, as shown in Figs. , this heat transfer plate) (ioA) and a heat transfer plate (IOB) which is upside down on a plane are laminated alternately. By repeating such a laminated arrangement, equal flow path intervals are set between the heat transfer plates (10) arranged oppositely.

A plurality of heat transfer plates placed opposite to this) (1
0) If you want to set the channel spacing alternately wide and narrow, set the fifth
As shown in the figure and FIG. Turn the seating surface (15
) with a gasket (13) fixed on the heat transfer plate (
10B) are alternately stacked. By repeating such a laminated arrangement, heat transfer plates (10
), alternately wide and narrow channel intervals are set.

〔Effect of the invention〕

Since the heat transfer plate can be manufactured using a single press mold regardless of the channel spacing, the manufacturing cost of the plate heat exchanger is significantly reduced. Furthermore, since the distance between the seating surfaces is constant, only one type of gasket is required, which not only simplifies the structure of the heat transfer plate but also reduces manufacturing man-hours. Furthermore, since it is possible to change the channel spacing depending on the viscosity and solid content of the medium, the heat exchanger becomes suitable for heating/cooling a medium with high viscosity or a medium with a large solid content.

[Brief explanation of drawings]

FIG. 1 is a plan view of a heat transfer plate according to the present invention, FIG. 2 is a cross-sectional view thereof, FIGS. 3 and 5 are explanatory diagrams of the stacking order of heat transfer plates, and FIGS. 4 and 6 are 7A and 7B are plan views of conventional heat transfer plates, and FIG. 8 is a cross-sectional view illustrating the laminated structure thereof. (10) (IOA) (IOB) - Heat transfer plate, (11) - Corrugated part for generating turbulence, (i4) (H) Heat transfer surface, (13) Gaskent, (15)
Kasukenote support surface, forming depth of heat transfer plate, (16A) (16B) - Play 1 - Spacing bead.

Claims (1)

[Claims] (1) In a plate heat exchanger constructed by stacking a plurality of heat transfer plates each having a corrugated portion for generating turbulence on the heat transfer surface via a gasket, the periphery of the heat transfer surface The supporting surface of the gasket provided in the section is located at the center of the forming depth of the heat transfer plate, and the turbulent flow is placed at an asymmetrical position on the heat transfer surface when viewed from the width direction of the heat transfer plate. 1. A plate heat exchanger characterized in that a bead for maintaining plate spacing having a height greater than a waveform part for generation is fixedly installed.