JPS6176889A - Plate type heat exchanger - Google Patents

Abstract

PURPOSE:To constitute a plate type heat exchange element having an excellent heat transfer coefficient, an excellent pressure resistance and the like by assembling plate formed by working corrugations and grooves rectangularly intercrossing them. CONSTITUTION:Corrugated grooves 12 which are formed in parallel to plate 11 and repeated grooves 13 formed rectangularly thereto are provided. The grooves 12 and 13 may be formed into a semi-circular shape, a trapezoidal shape and any other shapes. A heat transfer element 14 is constituted by accumulating the plates 11 upside down alternately. Upon this occasion, the depressions of the grooves 12 are assembled to form cylindrical flow passages 15 so that the projections of the grooves 13 make contact with each other, and further the grooves 12 are distorted by a half pitch at every step. As a result, a zigzag flow passage 16 is formed. The heat exchanger constituted of this heat transfer element has as large heat transfer coefficient by the turbulent flow of the flow passages, and has an excellent pressure resistance as a plate type. The resistance to thermal impact is strong due to the depressions an projections of the plate.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an improvement in a small plate-type exchanger that has a partition wall for two fluids and performs heat exchange through the partition wall.

PRIOR TECHNOLOGY A plate is used as a partition wall for two fluids, and a device for exchanging heat through this partition wall is generally called a plate heat exchanger, and consists of a plate 31 as shown in FIG. Plate 31t - Tighten, fluid with gas foot 32? It consists of a sealing type and a plate 54, for example as shown in FIG.
There is a type in which the sides are welded alternately to form a flow path.

As for the method of supporting the deformation of the plate due to internal pressure, the former method involves the convex portions 33 of the corrugated sheet contacting each other at multiple points at a certain angle, while the latter method supports the convex portions 33 of the corrugated sheet at multiple points forming a fixed angle, and the latter method supports the deformation of the plate due to internal pressure. The parts 35 may be brought into contact with each other, or a suitable spacer (not shown) may be provided.

The former is mainly! /Used for liquid heat exchange, but due to its structure, low pressure of less than 20kg/ω2G, 200
Limited to applications at low temperatures below ℃. On the other hand, in the latter case, 1 kl! Most of them have a usage limit of less than /cm''G, and their use is at most for heat recovery in chimneys.

PROBLEMS TO BE SOLVED BY HAS Q+4 An object of the present invention is to provide a plate heat exchange element that can withstand higher temperatures and pressures, and to provide an inexpensive plate heat exchanger that can be used in a wider range of applications.

Precautionary Means to Solve the Problems The present invention combines two corrugated plates facing each other to form a strip having a cylindrical flow path, and a plurality of such strips. A heat exchanger that has a space and is assembled with a plurality of U's that are orthogonal to the corrugations formed in advance on the plates.
This invention relates to a plate-type heat exchanger that is specially adapted to define the mutual position of strips by means of individual protrusions.

That is, the present invention is characterized in that a heat exchange element 1 having good heat transfer coefficient, pressure resistance, etc. is constructed by combining a plate having a corrugated shape and a groove perpendicular thereto.

The present invention will be explained below based on the drawings.

FIG. 1 is a partial perspective view of a plate that is a constituent element of a heat exchanger showing an embodiment of the present invention, and FIG.
The figure is a-a view of FIG. 2;, 1! 4 [iKl is the 'b-c-c'-b sectional view in Figure 2, Figure 5 is an explanatory diagram of the method of forming a heat exchanger with the element, and Figure 6 is an explanation of the flow path 15. It is a diagram.

As shown in FIG. 1, the plate 11 is provided with parallel wavy grooves 12 and repeating grooves 13 perpendicular thereto.

The only important thing about the grooves 12 and 13 is that they have recesses, and their shape may be semicircular, trapezoidal, or other shapes.

As shown in FIGS. 2 to 4, the heat transfer element 14 is constructed by stacking the plates 11 upside down every other time. At this time, the grooves 12 are assembled so that the convex portions of the grooves 13 (lower side in FIG. 1) are in contact with each other, and the four parts (upper side in FIG. 1) form a cylindrical flow path 1st. , as shown in FIG. 3, are arranged so that each row is shifted by half a pitch. Thus, a zigzag channel 16 is formed.

The size and shape of the cylindrical channel 15 can be arbitrarily determined by selecting the depth and shape of the plate 11 (#1112 to be formed), and can be arbitrarily determined by the height of the zigzag channel 16 and the depth of the groove 13. .

Therefore, the groove 12.13Vi needs to be the same depth.
do not have.

Based on this heat transfer element, the concept configuring the heat exchanger
- Shown in Figure 5. That is, as shown in FIGS. 2 to 4, the opposing end surfaces 17 and 18t-1 of the stacked plates are welded so that the flow paths alternately form a cross flow. Then, tighten the backup plate 19 according to the internal pressure with the tie rod 20, and create a manifold that serves as the inlet and outlet for the fluid 1.2 (not shown in the south).
Attach it and it will be completed.

A plan view of the flow path 15 is shown in Figure @6. Since the channel 15 has a pocket 21 formed by the groove 13 perpendicular to the channel 15,
As shown in FIG. 6, the fluid flowing here advances while repeatedly expanding and contracting t7. The fluid flowing through the flow path 16 travels in a zigzag pattern along this flow path. In addition, the force due to these fluid pressures is due to the fact that the plates are in contact with each other at multiple points.
Support by mutual reaction, backup plate 19
, can be supported by tie rods 20.

FIG. 7 is a partial perspective view of a plate showing another embodiment of the present invention. The concave portion perpendicular to the waveform according to the present invention is
It does not necessarily have to be continuous like 13 in FIG. 1, but may be a continuous concave portion (or convex portion if turned upside down) 13' as shown in this figure.

Effects of invention (1)! As the effect of the turbulence action of X-path IF, 16,
Heat transfer coefficient increases. Also, the heat transfer wall surface is less likely to get dirty.

(2) As a plate type heat exchanger, it has extremely good pressure resistance and can be practically manufactured up to about 1001 to 9/m''G.

(3) Since the plate has large irregularities, thermal stress can escape as distortion of the plate, making it resistant to thermal shock.

(4) Ninth, using thin plate as the material is low cost.

[Brief explanation of the drawing]

FIG. 1 is a partial perspective view showing an example of an embodiment of a plate that is a constituent element of a heat exchanger according to the present invention, FIG. 2 is a partial plan view of an element constructed of the plate, and FIG. 3 is a parent view taken along line a-a in FIG. 2, FIG. 4 is a sectional view taken along line b-c-a'-b in FIG. 2, and FIG. , FIG. 6 shows the flow path 15
FIG. 7 is a partial perspective view showing another embodiment of the plate which is a component of the heat exchanger according to the present invention. FIGS. 8 and 9 show examples of plate portions of conventional plate heat exchangers. Sub-agents 1) Meiju agent Ryo Hagiwara - Figure 5 Figure 6

Claims (1)

[Claims] A heat exchanger in which two corrugated plates are combined face to face to form a strip having a cylindrical flow path, and a plurality of the strips are combined with a space therebetween,
1. A plate-type heat exchanger characterized in that the mutual positions of the strips are defined by a plurality of protrusions perpendicular to a waveform formed on the plate in advance.