CN100592020C - Plate heat exchanger with medium divider around corner hole - Google Patents

Abstract

This kind of plate heat exchanger manufactured by semi-welded, semi-detachable and fully detachable technology has a medium divider around the corner hole, and the evenly divided heat exchange medium flows in the confluence flow channel formed by the corner hole. It is characterized in that: there is a special sealing gasket for evenly dividing the heat exchange medium around each corner hole forming the confluence flow channel, and a concave-convex structure that restricts and fixes the special sealing gasket. For the opening of the heat exchange medium, the special sealing gasket can be distributed in multiple layers, and the special sealing gasket can be fixed in the concave-convex structure around the corner hole of the heat exchange plate by means of sticking or non-sticking. When two heat exchange plates When the plates are welded and sealed together to form a heat exchange box, the special sealing gasket is located around the corner hole of the heat exchange plate and inside the heat exchange box.

Description

Plate heat exchanger with medium divider around corner hole

technical field

The invention relates to a plate heat exchanger, in particular to a plate heat exchanger manufactured by semi-welded, semi-detachable and fully detachable technologies.

Background technique

This kind of plate heat exchanger manufactured by semi-welded, semi-detachable and fully detachable technology is assembled with several roughly rectangular or square and other shaped heat exchange plates. Structure, the heat exchange structure on some heat exchange plates is composed of regular concave-convex support ribs, and the heat exchange structure on some heat exchange plates is composed of corrugations. The corner holes for heat medium circulation. When these heat exchange plates are stacked together, these corner holes will form a confluence flow channel for heat exchange medium in the plate heat exchanger. Sealed gaskets;

Among them, the plate heat exchanger manufactured by semi-welded and semi-detachable technology refers to; two heat exchange plates are welded together at the periphery and corner holes to form a welded and sealed heat exchange box. One heat exchange medium circulates in the box, another heat exchange medium circulates between the heat exchange boxes, and the heat exchange boxes and the heat exchange medium are sealed with sealing gaskets;

The plate heat exchangers manufactured by semi-welded, semi-detachable and fully detachable technologies use front and rear steel thick baffles and bolts and nuts to clamp several heat exchange plates or several heat exchange boxes to make the gasket The sheet is sealed and withstands working pressure.

There is generally no heat transfer medium equalizer in the corner holes of semi-welded, semi-detachable and fully detachable plate heat exchangers, but semi-welded and semi-detachable plate heat exchangers are often used for evaporators and evaporators in refrigeration cycles. Condenser, because this kind of plate heat exchanger lacks the equal distribution device of heat exchange medium at the inlet of refrigerant and in the confluence flow channel composed of corner holes, it often makes this kind of plate heat exchanger unable to exert its due heat exchange efficiency.

One of the heat exchange media in the refrigeration cycle evaporator, the "cold medium", will not be automatically and evenly distributed to the layers between the heat exchange plates after flowing into the confluence channel of the plate heat exchanger, because these media are generally A mixed flow of liquid and a small amount of vapor that has been evaporated. This mixed flow is often separated into a liquid interface and an evaporated gas interface in the combined flow channel under the action of gravity. They usually do not maintain a uniform distribution in the combined flow channel. Fluid form, resulting in uneven evaporation of the cold medium in each evaporative heat exchange layer of the plate heat exchanger, some heat exchange layers have less cold medium, and the heat transfer efficiency of these heat exchange plates The process is not fully and effectively utilized, and there are too many refrigerant media in other heat exchange levels, and the refrigerant media in these layers will not evaporate sufficiently, thereby affecting and reducing the overall heat exchange efficiency of the plate heat exchanger.

In order to solve the problem of uneven distribution of the cold medium in each heat exchange level of the plate heat exchanger, two patents that solve this problem can be found in the Chinese patent data, they are: Patent No. 93121143.3 and Patent No. 96198973.4.

The disadvantage of the patent No. 93121143.3 is that the cost of the patented technology is high and the refrigerant equalizing device and the plug-in refrigerant equalizing pipe are not easy to fix and assemble.

The shortcoming of the patent No. 96198973.4 is that this structure of equal distribution of medium is only applicable to welded and brazed plate heat exchangers, and cannot be used in semi-welded, semi-detachable and fully detachable plate heat exchangers .

Contents of the invention

The object of the present invention is to provide a heat exchange medium equalizer that is easy to manufacture and low in cost, and is suitable for semi-welded, semi-detachable and fully detachable plate heat exchangers. Such a heat-exchange medium equalizer can especially be used It is used to evenly distribute the cold medium when the semi-welded and semi-detachable plate heat exchanger is used as a refrigeration evaporator.

The present invention is achieved in this way; the plate heat exchanger with a medium divider around the corner holes includes: heat exchange plates, peripheral sealing gaskets, and the heat exchange medium to be equally divided in the confluent flow formed by the corner holes The flow in the channel is characterized in that: the periphery of each corner hole that forms the confluence flow channel has a special sealing gasket for evenly dividing the heat exchange medium and a concave-convex structure that restricts and fixes the special sealing gasket. The special sealing gasket is useful. Openings for evenly distributing the heat exchange medium.

In the fully detachable plate heat exchanger, the special sealing gasket and the peripheral sealing gasket are located on the same level of the heat exchange plate.

In semi-welded and semi-detachable plate heat exchangers, the special sealing gasket and the peripheral sealing gasket are not on the same layer of the heat exchange plate. When the peripheral sealing gasket is located on the opposite front of the heat exchange plate, the special sealing gasket The fins are located on the opposite back side of the heat exchange plate.

When the heat exchange plates are welded and sealed together to form a heat exchange box, the special sealing gasket is located around the corner hole of the heat exchange plate and inside the heat exchange box, while the peripheral sealing gasket is located outside the heat exchange box.

The special sealing gasket can be distributed in multiple layers, and the number of openings, the positions of the openings and the angle of the openings can be selected in any suitable form as required.

The material of the special sealing gasket can be any suitable sealing material, its cross-section can be any suitable cross-sectional shape, and its circumferential shape can be circular, oval and any suitable shape.

The special sealing gasket can be limited and fixed in the concave-convex structure around the corner hole of the heat exchange plate by means of sticking or sticking.

The concave-convex structure that restricts and fixes the special sealing gasket can be in the form of regularly arranged concave-convex ribs and a concave-convex ring with openings. Set according to the requirements of special sealing gaskets.

The cross-sectional shape and circumferential shape of the concavo-convex structure that restricts and fixes the special sealing gasket can be set according to the requirements of the special sealing gasket.

The present invention has following advantage and positive effect:

The evenly divided heat exchange medium can only flow out from the opening of the special sealing gasket due to the blockage of the special sealing gasket around the corner hole. The accumulation and retention in the confluence flow channel composed of each corner hole, it may flow out from the opening of the special sealing gasket after the accumulation and retention to a certain extent, so as to achieve the purpose of evenly dividing the heat exchange medium;

If there are more than two rings of special sealing gaskets, the evenly divided heat exchange medium will flow in the S-shaped channel composed of the special sealing gasket and its opening, and the heat exchange medium can be better in these S-shaped channels. It is evenly accumulated and retained and can make the pressure of the heat exchange medium in the S-shaped channel equal. When the heat exchange medium flows out from the opening of the special sealing gasket on the outermost layer, it can make each surface of each heat exchange plate The heat exchange medium is evenly distributed and the plate heat exchanger can be fully and effectively utilized.

When the semi-welded and semi-detachable plate heat exchanger is used in the refrigeration evaporator, the cold medium is generally selected to circulate in the heat exchange box, so at this time the special sealing gasket around the corner hole will be located in the heat exchange box .

When manufacturing the heat exchange plate, it is very convenient to press the corrugated and concave-convex ribs and the concave-convex structure around the corner hole to limit and fix the special sealing gasket.

No matter how many heat exchange plates and heat exchange boxes are assembled, they can form a uniform distribution of heat exchange medium in the plate heat exchanger.

Since the heat exchange medium divider of the present invention is realized by relying on the special sealing gasket and the opening position and number of openings on it, it can be applied to any heat exchange medium including various cold mediums in plate heat exchangers. The requirements for uniform distribution and uniform evaporation in the heater.

Description of drawings

Figure 1. A partial schematic diagram of a semi-welded and semi-detachable plate heat exchanger with a medium divider around the corner hole, where A-A is a top view of a single piece, and A'-A' is a stack of multiple pieces and multiple heat exchange boxes Install top view.

Figure 2. A partial schematic diagram of a fully detachable plate heat exchanger with a medium divider around the corner hole, where D-D is a top view of a single piece, and D’-D’ is a top view of a multi-piece stack.

In Figure 1 and Figure 2; 1 represents the heat exchange box, 2 and 2a represent the surrounding sealing gaskets, 3 and 3a represent various heat exchange plates, 4, 4a and 4b represent special sealing gaskets, and 5 and 5a represent concave-convex ribs Bubbles, 6, 6a represent the opening angle of the special sealing gasket, 7, 7a, 7b represent the opening of the special sealing gasket, 8, 8a represent the corner holes on each heat exchange plate, 9 represent the unevenness of the special sealing gasket for limiting and fixing ring.

Detailed ways

The evenly divided heat exchange medium can only flow out from the openings 7, 7a, 7b of the special sealing gaskets 4, 4a, 4b due to the blocking of the special sealing gaskets 4, 4a, 4b around the corner holes 8, 8a. The positions of the openings 7, 7a, and 7b of the sealing gaskets 4, 4a, and 4b tend to cause the evenly divided heat exchange medium to accumulate and stay in the confluence flow channel composed of the corner holes 8, 8a. After reaching a certain level, it is possible to flow out from the openings 7, 7a, 7b of the special sealing gaskets 4, 4a, 4b, thereby achieving the purpose of evenly distributing the heat exchange medium.

If there are more than two rings of special sealing gaskets 4, 4a, the evenly divided heat exchange medium will flow in the S-shaped channel composed of special sealing gaskets 4, 4a and their openings 7, 7a, and the heat exchange medium In these S-shaped channels, it can be better evenly accumulated and retained, and the pressure of the heat exchange medium in the S-shaped channel can be equalized. When the heat exchange medium passes through the opening 7 of the outermost special sealing gasket When flowing out, the heat exchange medium on each level of each heat exchange plate 3, 3a can be evenly distributed and the plate heat exchanger can be fully and effectively utilized.

When the semi-welded and semi-detachable plate heat exchanger is used in the refrigeration evaporator, the cold medium is generally selected to circulate in the heat exchange box 1, so at this time the special sealing gaskets 4, 4a around the corner hole 8 will be located Inside the heat exchange box 1.

When manufacturing the heat exchange plates 3, 3a, it is very convenient to press the corrugated and concave-convex ribs to form the concave-convex structures around the corner holes to limit and fix the special sealing gaskets 4, 4a, 4b.

No matter how many heat exchange plates 3 a and heat exchange boxes 3 are assembled, they can form a uniform distribution of heat exchange medium in the plate heat exchanger.

Since the heat exchange medium divider of the present invention is realized by relying on special sealing gaskets 4, 4a, 4b and the positions of openings 7, 7a, 7b on them, the number of openings 7, 7a, 7b, etc., it can be applied to Any heat exchange medium, including various cold medium media, is required to be evenly distributed and evenly evaporated in the plate heat exchanger.

In the above example;

The plate heat exchanger with a medium divider around the corner holes 8, 8a includes: heat exchange plates 3, 3a, peripheral sealing gaskets 2, 2a, the heat exchange medium to be equally divided by the corner holes 8, The flow in the confluence flow channel composed of 8a is characterized in that: the periphery of each corner hole 8, 8a forming the confluence flow channel has special sealing gaskets 4, 4a, 4b for evenly dividing the heat exchange medium and restricting and fixing the special seal. The concave-convex structure of the gaskets 4, 4a, 4b, the special sealing gaskets 4, 4a, 4b have openings 7, 7a, 7b for evenly distributing the heat exchange medium.

In the fully detachable plate heat exchanger, the special sealing gasket 4b and the peripheral sealing gasket 2a are located on the same level of the heat exchange plate 3a.

In the semi-welded and semi-detachable plate heat exchanger, the special sealing gaskets 4, 4a and the peripheral sealing gasket 2 are not on the same level of the heat exchange plate 3, when the peripheral sealing gasket 2 is located at the When facing the front, the special sealing gaskets 4, 4a are located on the opposite back of the heat exchange plate 3.

When the heat exchange plates 3 are welded and sealed together to form the heat exchange box 1, the special sealing gaskets 4 and 4a are located around the corner holes 8 of the heat exchange plates 3 and inside the heat exchange box 1, while the peripheral sealing gaskets 2 is located outside the heat exchange box 1.

Special sealing gasket 4, 4a, 4b can have multi-layer distribution, the quantity of its opening 7, 7a, 7b and the position of opening 7, 7a, 7b and the angle 6, 6a of opening 7, 7a, 7b can choose any proper form.

The material of the special sealing gaskets 4, 4a, 4b can be any suitable sealing material, its cross-section can be any suitable cross-sectional shape, and its circumferential shape can be circular, oval or any suitable shape.

The special sealing gaskets 4, 4a, 4b can be limited and fixed in the concavo-convex structure around the corner holes 8, 8a of the heat exchange plates 3, 3a in an adhesive or non-adhesive manner.

The concave-convex structure that restricts and fixes the special sealing gasket 4, 4a, 4b can be in the form of regularly arranged concave-convex ribs 5, 5a and a concave-convex ring 9 with openings. The number of openings, opening positions and opening angles can be set according to the requirements of special sealing gaskets 4, 4a, 4b.

The cross-sectional shape and circumferential shape of the concavo-convex structure that restricts and fixes the special sealing gaskets 4, 4a, 4b can be set according to the requirements of the special sealing gaskets 4, 4a, 4b.

Claims (9)

1. A plate heat exchanger with a medium divider around the corner hole, including: heat exchange plates (3, 3a), peripheral sealing gaskets (2, 2a), and heat exchange medium to be equally divided It flows in the confluence flow channel composed of corner holes (8, 8a), which is characterized in that: there is a first special sealing gasket for evenly dividing the heat exchange medium around the periphery of each corner hole (8, 8a) forming the confluence flow channel sheet (4, 4b) and the concavo-convex structure that restricts and fixes the special sealing gasket (4, 4b), and the first special sealing gasket (4, 4b) has a first special sealing gasket for evenly distributing the heat exchange medium Openings (7a, 7b), the openings (7a, 7b) of the first special sealing gasket are set in the confluence flow channel formed by the corner holes of the heat exchange plate to allow the evenly divided heat exchange medium to accumulate and stay in it, And it can only flow out from the opening (7a, 7b) of the first special sealing gasket after accumulating and retaining to a certain amount. 2. The plate heat exchanger according to claim 1, characterized in that: the plate heat exchanger is fully detachable, and the first special sealing gasket (4, 4b) and the peripheral sealing gasket (2, 2a) Located on the same level as the heat exchange plates (3a). 3. The plate heat exchanger according to claim 1, characterized in that: the plate heat exchanger is semi-welded and semi-detachable, and the inside of the first special sealing gasket (4, 4b) is also provided with a second The difference between the second special sealing gasket (4a), the first special sealing gasket (4, 4b) and the second special sealing gasket (4a) and the peripheral sealing gasket (2, 2a) on the heat exchange plate (3) On the other hand, when the peripheral sealing gasket (2, 2a) is located on the opposite front side of the heat exchange plate (3), the first dedicated sealing gasket (4, 4b) and the second dedicated sealing gasket (4a) are located on the opposite side of the heat exchange plate (3). On the opposite back side of the heat exchange plate (3). 4. The plate heat exchanger according to claim 1, characterized in that: when two heat exchange plates (3) are welded and sealed together to form a heat exchange box (1), the first special sealing gasket (4 , 4b) are located around the corner hole (8) of the heat exchange plate (3) and inside the heat exchange box (1), while the peripheral sealing gaskets (2, 2a) are located outside the heat exchange box (1). 5. The plate heat exchanger according to claim 1, characterized in that: in the corner hole (8), there is a second special sealing gasket (4a) inside the first special sealing gasket (4, 4b) , forming a multilayer distribution. 6. The plate heat exchanger according to claim 1, characterized in that: the first special sealing gasket (4, 4b) is made of any suitable sealing material, and its cross-sectional circumferential shape is circular, oval and other suitable shapes. 7. The plate heat exchanger according to claim 1 is characterized in that: the first special sealing gasket (4, 4b) is restricted and fixed on the heat exchange plate (3, 3a) in a sticky or non-sticky way ) in the concavo-convex structure around the corner hole (8, 8a). 8. The plate heat exchanger according to claim 1, characterized in that: the concave-convex structure that restricts and fixes the first special sealing gasket (4, 4b) is regularly arranged concave-convex ribs (5, 5a) . 9. The plate heat exchanger according to claim 5, characterized in that: the concave-convex structure that restricts and fixes the first special sealing gasket (4, 4b) includes regularly arranged concave-convex ribs (5, 5a) And the concave-convex ring (9) with opening between the first special sealing gasket (4, 4b) and the second special sealing gasket (4a); the number and The arrangement is adapted to the shape of the fixed special sealing gasket, and the opening position of the convex-concave ring (9) with openings is the same as the opening (7a, 7b) of the first special sealing gasket and the opening of the second special sealing gasket (7) Correspondence.

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