CN112414181B

CN112414181B - Plate Heat Exchanger

Info

Publication number: CN112414181B
Application number: CN202010370077.3A
Authority: CN
Inventors: 李华; 请求不公布姓名
Original assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Current assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2025-03-18
Anticipated expiration: 2040-04-30
Also published as: CN112414181A

Abstract

The plate heat exchanger provided in the present application includes a heat exchange core, wherein the first plate group of the heat exchange core includes a plurality of first plates and a plurality of second plates, and each opening of the first plate is stacked with each opening of the second plate to form a plurality of channels; the plate heat exchanger also includes a first side plate and a second plate group, wherein the second plate group is fixed to the first plate group, and the second plate group is closer to the first side plate than the first plate group; the second plate group includes a third plate and a fourth plate, and the third plate is closer to the first side plate than the fourth plate; at least one channel exists in the plurality of channels, and the third plate and the fourth plate are both provided with a reinforcement structure matched with the channel; one side of the reinforcement structure of the third plate is in contact with at least a partial area of the reinforcement structure of the fourth plate, and the other side is in contact with at least a partial area of the first side plate. The plate heat exchanger of the present application has good pressure bearing performance.

Description

Plate heat exchanger

Technical Field

The application relates to the technical field of heat exchange, in particular to a plate heat exchanger.

Background

In the related art, the working pressure of fluid flowing in the plate heat exchanger is high, so that the strength requirement on the heat exchanger is high in order to ensure the stability of products. In order to ensure that the side plates outside the corner hole channels do not deform outwardly when the operation is pressed, corresponding to such flow positions with larger cavities at the corner hole channels, the inventor has appreciated that the outside of the side plates of the plate heat exchanger is reassembled and welded with a reinforcing plate having a thickness sufficient to withstand the operating pressure of the heat exchange fluid so as not to deform outwardly. But this is disadvantageous in that the product weight is reduced while the product strength is ensured.

Disclosure of Invention

The application aims to provide a plate heat exchanger with good pressure bearing capacity and favorable for reducing the weight of products.

The application provides a plate heat exchanger, which comprises a heat exchange core body, wherein the heat exchange core body comprises a plurality of plates which are fixed together and are arranged in a stacked mode, the heat exchange core body comprises a first plate group, the first plate group comprises a plurality of first plates and a plurality of second plates, the first plates and the second plates are alternately arranged, the first plates and the second plates comprise a plurality of orifices, each orifice of the first plates is respectively arranged corresponding to each orifice of the second plates, and the heat exchange core body is provided with a plurality of pore channels;

The plate heat exchanger further comprises a first side plate, wherein the first side plate is arranged on the outer side of the heat exchange core body along the plate lamination direction; the heat exchange core further comprises a second plate group, wherein the second plate group is fixed with the first plate group, and the second plate group is closer to the first side plate than the first plate group; the second plate group comprises a third plate and a fourth plate, and the third plate is closer to the first side plate than the fourth plate;

The third plate and the fourth plate are respectively provided with a reinforcing structure, at least one pore canal exists in the pore canals, the projection of the reinforcing structure of the third plate on the plane coincides with the projection of the pore canal on at least part of the area of the pore canal on the plane in a plane perpendicular to the lamination direction of the plates, the projection of the reinforcing structure of the fourth plate on the plane coincides with the projection of the pore canal on at least part of the area of the pore canal on the plane, one side of the reinforcing structure of the third plate is contacted with the reinforcing structure of the fourth plate on at least part of the area, and the other side of the reinforcing structure of the third plate is contacted with the first side plate on at least part of the area.

According to the plate heat exchanger provided by the application, in the plane perpendicular to the stacking direction of the plates, the projection of the reinforcing structure of the third plate is overlapped with at least part of the projection of the pore canal, and the projection of the reinforcing structure of the fourth plate is overlapped with at least part of the projection of the pore canal, so that the reinforcing structures are arranged at the local positions of the third plate and the fourth plate corresponding to the pore canal, the weight of the whole product is reduced, the thickness of the reinforcing structure of the third plate and the thickness of the reinforcing structure of the fourth plate are overlapped with the thickness of the first side plate, the risk of the first side plate in compression and convex deformation is reduced, and the plate heat exchanger can obtain good pressure-bearing performance.

Drawings

Fig. 1 is a schematic structural view of a plate heat exchanger according to an embodiment of the present application;

FIG. 2 is a schematic structural view of a heat exchange core according to an embodiment of the present application;

fig. 3 is an exploded schematic view of a part of the construction of the plate heat exchanger of fig. 1 according to the present application;

FIG. 4 is a schematic view of a first plate and a second plate according to an embodiment of the present application;

FIG. 5 is a schematic view of a third plate according to an embodiment of the present application;

FIG. 6 is a schematic view of a fourth plate according to an embodiment of the present application;

fig. 7 is a schematic cross-sectional view of a plate heat exchanger according to an embodiment of the present application;

FIG. 8 is an enlarged schematic view of the partial location of FIG. 7 in accordance with the present application;

FIG. 9 is an enlarged schematic view of a partial position structure of the third plate shown in FIG. 5 according to the present application;

FIG. 10 is an enlarged schematic view of a partial position structure of the fourth plate shown in FIG. 6 according to the present application;

FIG. 11 is a schematic view of another third plate according to an embodiment of the present application;

fig. 12 is an enlarged schematic view of a specific position of a plate heat exchanger employing the third plate shown in fig. 11;

FIG. 13 is a schematic view of a third plate according to an embodiment of the present application;

fig. 14 is an enlarged schematic view of a specific position of a plate heat exchanger employing the third plate shown in fig. 13;

Fig. 15 is a schematic view of another plate heat exchanger according to an embodiment of the present application;

Fig. 16 is an enlarged schematic view of a partial position of a cross-sectional structure of the plate heat exchanger of fig. 15 according to the present application.

Detailed Description

As shown in fig. 1 to 6, the present application relates to a plate heat exchanger 10 comprising a heat exchange core 11, the heat exchange core 11 comprising a plurality of stacked plates 100 secured together. A gap is formed between adjacent plates 100 for the passage of fluid. And the two sides of the plate 100 typically flow different types of heat exchange medium.

The heat exchange core 11 in the embodiment of the application comprises a first plate package 12, the first plate package 12 comprising a plurality of first plates 101 and a plurality of second plates 102, the first plates 101 and the second plates 102 being alternately arranged.

The first plate 101 and the second plate 102 each comprise a plurality of openings, and each opening of the first plate 101 is respectively laminated with each opening of the second plate 102 to form a plurality of portholes 30. For the number of apertures arranged on the plate, in some application scenarios, the plate 100 is provided with 4 angular holes, and the plate heat exchanger can exchange heat by adopting two heat exchange media. In other application scenarios, the plate 100 may also be provided with 6 angular holes, and the plate heat exchanger may use three heat exchange media for heat exchange. The specific heat exchange form is not particularly limited according to the actual application scene.

In the embodiment of the present application, the plurality of plates 100 of the heat exchange core 11 are stacked to form first and second flow channels that are not in communication, the first flow channel being for circulating a refrigerant, and the second flow channel being for circulating a coolant. Accordingly, the plurality of inter-plate channels formed by stacking the plurality of plates 100 alternate in such a manner that one layer of coolant flows and another adjacent layer of coolant flows.

The first plate 101 and the second plate 102 of the present application each comprise a first port 21, a second port 22, a third port 23 and a fourth port 24. The four apertures may be distributed at four corner positions of the plate, respectively. The first port 21, the second port 22, the third port 23 and the fourth port 24 of the first plate 101 are respectively arranged corresponding to the first port 21, the second port 22, the third port 23 and the fourth port 24 of the second plate 102, specifically, the first port 21 of each plate of the first plate group 12 is aligned to form a first porthole 31, the second port 22 of each plate is aligned to form a second porthole 32, the third port 23 of each plate is aligned to form a third porthole 33, and the fourth port 24 of each plate is aligned to form a fourth porthole 34. Wherein the first and second portholes 31, 32 are part of a first flow channel and the third and fourth portholes 33, 34 are part of a second flow channel.

The plate heat exchanger 10 further comprises a first side plate 14, the first side plate 14 being arranged outside the heat exchanger core 11 in the stacking direction of the plates 100. The heat exchange core 11 further comprises a second plate package 13, the second plate package 13 being fixed to the first plate package 12, and the second plate package 13 being closer to the first side plate 14 than the first plate package 12. The second plate set 13 may be fixed between the first plate set 12 and the first side plate 14, so that the second plate set 13 is fixed between the outermost plate adjacent to the first plate set 12 and the first plate set 12, and the outermost plate adjacent to the first side plate 14 of the second plate set 13 is fixed with the first side plate. Of course, in other embodiments, fin plates or other plates may be further disposed between the second plate set 13 and the first side plate 14, so that the second plate set 13 may not be in direct contact with the first side plate 14, and for the channels formed by the first plate set 12, the fluid flowing in the channels does not directly contact the first side plate 14, and in the extending direction of the channels, the fluid is separated from the first side plate 14 by the second plate set, and the corresponding second plate set may play a role in reinforcing the strength of the first side plate 14, as described below.

In the embodiment of the present application, the second plate group 13 includes a third plate 103 and a fourth plate 104, the third plate 103 being closer to the first side plate 14 than the fourth plate 104. The third plate 103 may be fixedly connected directly between the fourth plate 104 and the first edge plate 14.

At least one porthole 30 exists in the portholes 30 of the first plate package 12, and the extending direction of the porthole 30 coincides with the stacking direction of the plates 100, i.e. the thickness direction of the plate heat exchanger 10. In the direction of extension of the portholes 30, the first side plates 14 interfere with the direction of extension of the portholes 30, the projection of the portholes 30 on the plane is located in the projection range of the first side plates 14 on the plane, the projection of the reinforcing structures 40 of the third plate 103 on the plane coincides with at least part of the area of the projection of the portholes 30 on the plane, and the projection of the reinforcing structures 40' of the fourth plate 104 on the plane coincides with at least part of the area of the projection of the portholes 30 on the plane. The reinforcing structure 40 of the third plate 103 is in contact on one side with at least a partial area of the reinforcing structure 40' of the fourth plate 104 and on the other side with at least a partial area of the first side plate 14.

The reinforcing structure 40 of the third plate 103 may be integrally formed with other portions of the third plate 103, the reinforcing structure 40 'of the fourth plate 104 may also be integrally formed with other portions of the fourth plate 104, in a practical application scenario, the edge plate thickness of the aluminum brazing sheet heat exchanger is usually 1.2mm to 1.5mm, the plate thickness is usually 0.4 to 0.5mm, and after the reinforcing structure 40 of the third plate 103, the reinforcing structure 40' of the fourth plate 104 and the first edge plate 14 are stacked, the thickness at the local position corresponding to the portholes 30 may be effectively increased. The hole channel positions formed by the holes of the plates are key parts affecting the product strength of the plate heat exchanger, and the reinforcing plates or reinforcing blocks are not required to be additionally added outside the first side plate 14 of the plate heat exchanger 10 so as to increase the side plate strength, and the integral strength of the plate heat exchanger can be effectively improved through the cooperation of the reinforcing structures of the third plate 103 and the fourth plate 104 of the heat exchange core 11 and the first side plate 14.

For the flow of fluid in the plate heat exchanger 10, the pressure of the refrigerant is typically much greater than that of the coolant, and therefore, the reinforcing structure 40 of the third plate 103 and the reinforcing structure 40' of the fourth plate 104 are preferably disposed in respective cell locations in the direction of extension of the cell through which the refrigerant flows. Therefore, the pressure bearing performance of the plate heat exchanger can be effectively improved according to the high pressure characteristic of the refrigerant. The third plate 103 and the fourth plate 104 may still be provided with angular holes corresponding to the channels through which the coolant flows, and referring to the schematic explosion diagram of the plate heat exchanger part structure illustrated in fig. 3, the third plate 103 is provided with a third orifice 23 and a fourth orifice 24, the fourth plate is also provided with a third orifice 23 and a fourth orifice 24, the third orifices 23 of the first, second, third and fourth plates are respectively corresponding and coaxially arranged, the fourth orifices 24 of the first, second, third and fourth plates are respectively corresponding and coaxially arranged, and the first side plate 14 can bear the pressure of the coolant with respect to low pressure.

In some embodiments of the present application, the first side plate 14 interferes with the direction of extension of each of the portholes 30 such that, in a plane perpendicular to the stacking direction of the sheets, the projection of each of the portholes 30 in that plane is within the projection of the first side plate 14 in that plane. As illustrated in fig. 3 and 7, the first side plate 14 may be a bottom side plate of the plate heat exchanger 10, and the reinforcing structure 40 of the third plate 103 includes a first reinforcing structure 401 and a second reinforcing structure 402, where the first reinforcing structure 401 interferes with the extending direction of the first porthole 31, and the second reinforcing structure 402 interferes with the extending direction of the second porthole 32. The reinforcing structure 40 of the fourth sheet 104 includes a third reinforcing structure 403 and a fourth reinforcing structure 404, the third reinforcing structure 403 interfering with the extending direction of the first portholes 31, and the fourth reinforcing structure 404 interfering with the extending direction of the second portholes 32. In a plane perpendicular to the stacking direction of the plates, the projection of the first reinforcing structure 401 on the plane and the projection of the third reinforcing structure on the plane are coincident with the projection of the first portholes 31 on the plane. The projection of the second stiffening structure 402 onto this plane and the projection of the fourth stiffening structure 404 onto this plane coincide with the projection of said second portholes 32 onto this plane.

One side of the first reinforcing structure 401 is attached and fixed to at least a part of the area of the third reinforcing structure 403, and the other side is attached and fixed to at least a part of the area of the first side plate 14. The second reinforcing structure 402 is attached and fixed to at least a portion of the fourth reinforcing structure 404 on one side and attached and fixed to at least a portion of the first side panel 14 on the other side.

The reinforcing structure 40 of the third panel 103 may be integrally formed with other portions of the third panel 103 and the reinforcing structure 40 of the fourth panel 104 may be integrally formed with other portions of the fourth panel 104. Thereby being beneficial to simplifying the difficulty of assembling and manufacturing the plate heat exchanger product. For example, for the manner of manufacturing the first sheet, the second sheet, the third sheet and the fourth sheet, a plurality of first die plates and a plurality of second die plates may be provided, 4 positions to be punched of the first die plates may be punched to obtain a first sheet 101 including 4 apertures, and 4 positions to be punched of the second die plates may be punched to obtain a second sheet 102 including 4 apertures. And (3) performing no punching operation on the positions to be punched corresponding to the first pore canal 31 and the second pore canal 32 of the first die plate to obtain a third plate sheet 103, wherein the positions to be punched of the third plate sheet 103, which are not subjected to the punching operation, form the reinforcing structure 40 of the third plate sheet 103, performing no punching operation on the positions to be punched corresponding to the first pore canal 31 and the second pore canal 32 of the second die plate to obtain a fourth plate sheet 104, and forming the reinforcing structure 40' of the fourth plate sheet 104 at the positions to be punched, which are not subjected to the punching operation, of the fourth plate sheet 104.

That is, the first sheet 101 and the third sheet 103 may be manufactured using the same first mold plate. The first die plate is punched corresponding to the positions of four holes to form the first plate 101, the first die plate is not punched corresponding to the positions of the first holes 31 and the positions of the second holes 32 to form the third plate 103, and referring to the schematic diagram of the partial position of the third plate 103 shown in fig. 9, one of the positions a1 to be punched of the third plate 103 is punched along the dotted line position indicated by a1, so that the first plate 101 with the corresponding position hole can be obtained. Similarly, the second sheet 102 and the fourth sheet 104 may be manufactured by using the same second mold plate, where the second mold plate is punched corresponding to the positions of the four holes to form the second sheet 102, and the second mold plate is punched corresponding to the position of the first hole 31 and the position corresponding to the second hole 32 to form the fourth sheet 104, and referring to the schematic diagram of the partial position of the fourth sheet 104 shown in fig. 10, one of the positions a2 to be punched of the fourth sheet 104 is punched along the dotted line position indicated by a2, so that the second sheet 102 with the corresponding position hole can be obtained. Thus being beneficial to reducing the difficulty of processing and manufacturing the sheet and saving the development cost of the die.

Of course, the reinforcing structure 40 of the third sheet 103 and other portions of the third sheet 103 may be formed into a unitary structure by secondary processing, and the reinforcing structure 40 of the fourth sheet 104 and other portions of the fourth sheet 104 may be formed into a unitary structure by secondary processing.

In some embodiments of the present application, as shown in fig. 2, the first portholes 31 and the second portholes 32 are located on two sides of the plate heat exchanger 10 in the length direction, wherein the first portholes 31 and the second portholes 32 are located on the same side of the plate heat exchanger 10 in the width direction, and accordingly, the fluid flows on the plate in a single-side flow manner. Of course, in other embodiments, the first channels 31 and the second channels 32 may be diagonally arranged, and accordingly, the fluid flows on the plate in a diagonal flow. Correspondingly, the third plate 103 is provided with the reinforcing structures 40 interfering with the extending directions of the corresponding channels in the extending directions of the corresponding first channels 31 and the extending directions of the corresponding second channels 32, and the fourth plate 104 is provided with the reinforcing structures 40' interfering with the extending directions of the corresponding channels in the extending directions of the corresponding first channels 31 and the extending directions of the corresponding second channels 32, so that the local positions of the corresponding channels of the first side plates 14 can be reinforced from the two sides of the length direction of the plate heat exchanger 10, which is more beneficial to the stability and the pressure-bearing performance of products.

Referring to fig. 7 and 8, the area where the reinforcing structure 40 of the third sheet 103 contacts the reinforcing structure 40 of the fourth sheet 104 is denoted as a first contact area S1, the area where the reinforcing structure 40 of the third sheet 103 contacts the first side plate 14 is denoted as a second contact area S2, and in some embodiments, a plane perpendicular to the axial direction of the porthole 30, a projection of the first contact area S1 on the plane may be located within a range of a projection of the second contact area S2 on the plane. Specifically, the projection of the first contact area S1 on the plane substantially coincides with the projection of the second contact area S2 on the plane, which is advantageous for maximizing the extent of overlapping the reinforcing structure 40 of the third plate 103 and the reinforcing structure 40' of the fourth plate 104 with the first side plate 14, for improving the pressure bearing capacity of the first side plate 14, and for improving the strength of the plate heat exchanger as a whole. Or the projection of the first contact area S1 on the plane may be slightly smaller than the projection of the second contact area S2 on the plane, of course, the projection of the first contact area S1 on the plane and the projection of the second contact area S2 on the plane may also be arranged in an intersecting manner, and both of them are partially overlapped with each other.

The plate heat exchanger 10 further comprises a second side plate 15, the heat exchanging core 11 is fixedly connected between the first side plate 14 and the second side plate 15, the first plate set 12 is fixedly connected between the second side plate 15 and the second plate set 13, and the second plate set 13 is fixedly connected between the first plate set 12 and the first side plate 14.

The second side plate 15 is provided with a plurality of plate holes 151, and in the plurality of pore channels 30, each pore channel 30 is correspondingly communicated with one plate hole 151. In fig. 3, the number of plate holes 151 is 4, two of which are part of the coolant channels and the other two of which are part of the coolant channels.

Each plate 100 has a flat plate portion 200. In some embodiments, the main heat exchange area in the middle of each plate 100 may be provided with a heat exchange element protruding relative to the flat plate portion 200, where the heat exchange element may be of a bump type or a herringbone type, and the heat exchange element may perform enhanced heat exchange on fluid.

Referring to fig. 5 to 10, the third sheet 103 has a first flat plate portion 2001, the third sheet 103 is provided with a first boss portion 201 protruding from the first flat plate portion 2001 thereof in a direction away from the first side plate 14, the third sheet 103 is further provided with a first groove portion 301, the first groove portion 301 is provided recessed from the first boss portion 201, and the first groove portion 301 forms at least a part of the reinforcing structure 40 of the third sheet 103.

The fourth plate 104 also has a second flat plate portion 2002, the fourth plate 104 being provided with a second groove portion 302 sinking from its second flat plate portion 2002 in the direction of the first edge plate 14, the second groove portion 302 forming at least part of the reinforcing structure of the fourth plate 104.

After the third plate 103 and the fourth plate 104 are assembled, the first boss 201 is in sealing connection with the second plate 2002 of the fourth plate 104, the second groove 302 is stacked with the first groove 301, one side of the first groove 301 is attached to and fixed to the second groove 302, and the other side of the first groove 301 is attached to and fixed to the first side plate 14.

The first boss portion 201 includes a first top 2011 and a first side wall 2012, the first top 2011 is a flat plate structure that is convenient for welding, the first side wall 2012 is connected between the first top 2011 and the first flat plate portion 2001, and the first side wall 2012 is disposed obliquely with respect to the first flat plate portion 2001.

The first groove portion 301 includes a first bottom 3011 and a second side wall 3012, the first bottom 3011 is a flat plate structure that facilitates welding, the second side wall 3012 is connected between the first top 2011 and the first bottom 3011, the second side wall 3012 is disposed obliquely with respect to the first flat plate portion 2001, and the first bottom 3011 is flush with the first flat plate portion 2001 of the third plate 103.

The second groove portion 302 includes a second bottom portion 3021 and a third side wall 3022, the second bottom portion 3021 is a flat plate structure that facilitates welding, the third side wall 3022 is connected between the second flat plate portion 2002 and the second bottom portion 3021, and the third side wall 3022 is disposed obliquely with respect to the second flat plate portion 2002.

The first side wall 2012, the second side wall 3012 and the third side wall 3022 are all of side wall structures which are obliquely arranged, so that demolding and manufacturing of the sheet are facilitated, and manufacturing difficulty is reduced. The first side wall 2012 and the second side wall 3012 extend in directions intersecting each other, so that demolding is more performed by the sheet.

The second side wall 3012 and the third side wall 3013 may be attached to each other and fixed, and may have a slight gap therebetween. One side of the first bottom 3011 of the first groove 301 is fixed to the second bottom 3021 of the second groove 302, and the other side is fixed to the first side plate 14.

In order to further improve the pressure bearing properties of the plate heat exchanger 10. As shown in fig. 11, the third sheet 103 further includes a fifth reinforcing structure 405 and a sixth reinforcing structure 406, in a plane perpendicular to the stacking direction of the sheets, a projection of the fifth reinforcing structure 405 in the plane coincides with a projection of the third porthole 33 in the plane, a projection of the sixth reinforcing structure 406 in the plane coincides with a projection of the fourth porthole 34 in the plane, the fifth reinforcing structure 405 interferes with the extending direction of the third porthole 33, and the sixth reinforcing structure 406 interferes with the extending direction of the fourth porthole 34. The fifth reinforcing structure 405 of the third panel 103 is at least partially attached and fixed to the first side panel 14, and the sixth reinforcing structure 406 of the third panel 104 is at least partially attached and fixed to the first side panel 14. The fifth reinforcing structure 405 and the sixth reinforcing structure 406 of the third sheet 103 are each part of the first flat plate portion 2001 of the third sheet 103.

The structure of the fourth plate 104 may be unchanged, i.e. the fourth plate 104 is provided with third apertures 23 and fourth apertures 24, as shown with reference to fig. 6. This is advantageous in that the plate-to-plate channels formed between the plates are reasonably utilized, in particular, a first plate-to-plate channel is formed between the third plate 103 and the fourth plate 104, and referring to the enlarged view of the partial position of the plate heat exchanger illustrated in fig. 12, in the extending direction of the third portholes 33, the fifth reinforcing structure 405 of the third plate interferes with the extending direction of the third portholes 33, the third portholes 23 of the fourth plate 104 form part of the third portholes 33, the fourth plate 104 is arranged at intervals with the third plate 103 around the plate surface on the peripheral side of the third portholes 23, and the fourth plate 104 is arranged at intervals with the third plate 103 around the plate surface on the peripheral side of the fourth portholes 24, so that both the third portholes 23 and the fourth portholes 24 of the fourth plate 104 are in communication with the first plate-to-plate channel, and the first plate channel is part of the second flow channel. Because the third channels 33 are configured to circulate the coolant, and the coolant still has a certain working pressure although the coolant has a lower working pressure than the coolant, the thickness of the fifth reinforcing structure 405 and the thickness of the sixth reinforcing structure 406 can be used to overlap the thickness of the first side plate 14, so that the fifth reinforcing structure 405 and the sixth reinforcing structure 406 of the third plate 103 that is closer to the first side plate 14 can be used to reinforce the local position of the first side plate 14, thereby facilitating the improvement of the pressure-bearing performance of the plate heat exchanger.

In other embodiments of the present application, referring to fig. 13 and 14, the third sheet 103 may be provided with no first groove 301, that is, the third sheet 103 may be provided with a first boss 201 protruding from the first flat plate 200 thereof in a direction away from the first side plate 14, the first boss 201 forming a recessed area 1031 on a side of the third sheet 103 adjacent to the first side plate 14, and at least a portion of the first boss 201 forming the reinforcing structure 40 of the third sheet 103.

The portion of the first flat plate portion 200 of the fourth plate 104 that interferes with the axial direction of the portholes 30 forms the reinforcing structure 40 of the fourth plate 104.

The first side plate 14 includes a main body 141 and a second boss 203, the second boss 203 protrudes toward a side where the third plate 103 is located with respect to the main body 141, the first boss 201 and the second boss 203 are stacked, the second boss 203 is at least partially located in the recessed area 1031, one side of a top 2011 of the first boss 201 is attached to and fixed to a top 2031 of the second boss 203, and the other side is attached to and fixed to the first flat plate 200 of the fourth plate 104.

The second boss portion 203 is integrally formed with the main body portion 141, or the second boss portion 203 and the main body portion 141 are welded as an integral structure, and a specific manner of welding may be brazing, for example. The main body portion 141 of the first side plate 14 closes the opening of the recessed area 1031, the second boss portion 203 is accommodated in the recessed area 1031, and the second boss portion 203 is connected between the main body portion 141 and the first boss portion 201 by welding.

The plate 100 and the first side plates 14 of the heat exchange core 11 are made of 3-series aluminum alloy, and the second boss 203 is made of any one of 3-series aluminum alloy, 6-series aluminum alloy, 7-series aluminum alloy, stainless steel, and carbon steel. For the plate heat exchanger 10 product, which may also include external connection pipes or other adapters for the inlet and outlet of two fluids, namely refrigerant and coolant, by way of example, referring to fig. 1, the plate heat exchanger 10 may also include a mounting plate 1, the mounting plate 1 being located outside the second side plate 15, the mounting plate 1 being adapted to be connected to the adapter 3 or to the external connection pipe 2. In fig. 1, for both fluids, the heat exchange is performed from the same side in the thickness direction of the plate heat exchanger to the flow channels in the heat exchange core.

Of course, in other embodiments of the application, as in fig. 15, two external connection pipes 2 of the plate heat exchanger 10 may be located on one side of the plate heat exchanger 10 in the thickness direction, e.g. on the upper side of the product in fig. 15, and two other adapter members 3 of the plate heat exchanger 10 may be located on the other side of the plate heat exchanger 10 in the thickness direction, e.g. on the lower side of the product in fig. 15.

In some embodiments, the first side plate 14 may also be a side plate located on the upper side of the plate heat exchanger 10, i.e. the first side plate 14 may be located between the heat exchange core 11 and the mounting plate 1, referring to fig. 16, which is an enlarged schematic view of a partial cross-sectional structure of the plate heat exchanger. The third plate 103 is located between the first side plate 14 and the fourth plate 104, and the fourth plate 104 is located between the third plate 103 and the first plate package 12. At the first portholes 31, the fluid is separated from the first side plates 14 by a second plate set, which can strengthen the first side plates 14.

Specifically, in a plane perpendicular to the stacking direction of the sheets, the projection of the first portholes 31 on the plane is located within the projection range of the first side plates 14 on the plane, the projection of the reinforcing structures 40 of the third sheet 103 on the plane coincides with at least a partial area of the projection of the first portholes 31 on the plane, and the projection of the reinforcing structures 40' of the fourth sheet 104 on the plane coincides with at least a partial area of the projection of the first portholes 31 on the plane. The reinforcing structure 40 of the third plate 103 is in contact on one side with at least a partial area of the reinforcing structure 40' of the fourth plate 104 and on the other side with at least a partial area of the first side plate 14. The reinforcement effect corresponding to this embodiment is similar to the principle of the foregoing embodiment, and the present application will not be repeated.

The above embodiments are only for illustrating the present application and not for limiting the technical solutions described in the present application, and the understanding of the present specification should be based on the description of the directivity of the present application such as "upper", "lower", etc., and although the present specification has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the present application may be modified or substituted by the same, and all technical solutions and modifications thereof without departing from the spirit and scope of the present application should be covered by the claims of the present application.

Claims

1. A plate heat exchanger (10) comprises a heat exchange core (11), wherein the heat exchange core (11) comprises a plurality of plates (100) which are fixed together and are arranged in a stacked mode, the heat exchange core (11) comprises a first plate group (12), the first plate group (12) comprises a plurality of first plates (101) and a plurality of second plates (102), the first plates (101) and the second plates (102) are alternately arranged, each of the first plates (101) and the second plates (102) comprises a plurality of holes, each hole of the first plates (101) is respectively arranged corresponding to each hole of the second plates (102), and the heat exchange core is provided with a plurality of pore channels (30);

The plate heat exchanger (10) further comprises a first side plate (14), wherein the first side plate (14) is arranged on the outer side of the heat exchange core (11) along the plate stacking direction, the heat exchange core (11) further comprises a second plate group (13), the second plate group (13) is fixed with the first plate group (12), the second plate group (13) is closer to the first side plate (14) than the first plate group (12), the second plate group (13) comprises a third plate (103) and a fourth plate (104), and the third plate (103) is closer to the first side plate (14) than the fourth plate (104);

The third plate (103) and the fourth plate (104) are respectively provided with a reinforcing structure, at least one pore canal (30) exists in the pore canals (30), the projection of the reinforcing structure (40) of the third plate (103) on the plane is overlapped with at least part of the projection of the pore canal (30) on the plane in a plane perpendicular to the lamination direction of the plates, the projection of the reinforcing structure (40 ') of the fourth plate (104) on the plane is overlapped with at least part of the projection of the pore canal (30) on the plane in a plane, one side of the reinforcing structure (40) of the third plate (103) is contacted with at least part of the area of the reinforcing structure (40') of the fourth plate (104), and the other side of the reinforcing structure is contacted with at least part of the area of the first side plate (14).

2. A plate heat exchanger (10) according to claim 1, wherein, in a plane perpendicular to the stacking direction of the plates, the projection of each porthole (30) in the plane lies within the projection of the first side plate (14) in the plane;

The area where the reinforcing structure (40) of the third sheet (103) contacts the reinforcing structure (40') of the fourth sheet (104) is denoted as a first contact area (S1), the area where the reinforcing structure (40) of the third sheet (103) contacts the first side plate (14) is denoted as a second contact area (S2), and the projection of the first contact area (S1) on the plane is located within the range of the projection of the second contact area (S2) on the plane;

The plate heat exchanger (10) further comprises a second side plate (15), the heat exchange core (11) is fixedly connected between the first side plate (14) and the second side plate (15), the first plate group (12) is fixedly connected between the second side plate (15) and the second plate group (13), the second plate group (13) is fixedly connected between the first plate group (12) and the first side plate (14), the second side plate (15) is provided with a plurality of plate holes (151), and each pore channel (30) of the pore channels (30) is respectively communicated with one plate hole (151).

3. A plate heat exchanger (10) according to claim 2, wherein the third plate (103) has a first plate portion (2001), the third plate (103) being further provided with a first boss portion (201) protruding from the first plate portion (2001) thereof in a direction away from the first side plate (14), the third plate (103) being further provided with a first groove portion (301), the first groove portion (301) being provided recessed from the first boss portion (201), the first groove portion (301) forming at least a part of the reinforcing structure (40) of the third plate (103);

The fourth plate (104) has a second plate portion (2002), the fourth plate (104) further being provided with a second groove portion (302) sinking from its second plate portion (2002) towards the first side plate (14), the second groove portion (302) forming at least part of a reinforcing structure (40') of the fourth plate (104);

The first boss part (201) is in sealing connection with a second plate part (2002) of the fourth plate (104), the second groove part (302) is stacked with the first groove part (301), one side of the first groove part (301) is attached and fixed with the second groove part (302), and the other side of the first groove part is attached and fixed with the first side plate (14).

4. A plate heat exchanger (10) according to claim 3, wherein the first boss portion (201) comprises a first top portion (2011) and a first side wall (2012), the first top portion (2011) being a flat plate structure for facilitating welding, the first side wall (2012) being connected between the first top portion (2011) and the first flat plate portion (2001), the first side wall (2012) being arranged obliquely with respect to the first flat plate portion (2001);

The first groove part (301) comprises a first bottom part (3011) and a second side wall (3012), the first bottom part (3011) is of a flat plate structure convenient for welding, the second side wall (3012) is connected between the first top part (2011) and the first bottom part (3011), and the second side wall (3012) is obliquely arranged relative to the first flat plate part (2001);

The second groove part (302) comprises a second bottom part (3021) and a third side wall (3022), the second bottom part (3021) is of a flat plate structure convenient for welding, the third side wall (3022) is connected between the second flat plate part (2002) and the second bottom part (3021), and the third side wall (3022) is obliquely arranged relative to the second flat plate part (2002).

5. A plate heat exchanger (10) according to claim 1 or 2, wherein the plurality of plates (100) are stacked to form first and second non-communicating flow channels, the first flow channels being for flow of a refrigerant and the second flow channels being for flow of a coolant;

The first plate (101) and the second plate (102) comprise a first orifice (21), a second orifice (22), a third orifice (23) and a fourth orifice (24), the first orifice (21), the second orifice (22), the third orifice (23) and the fourth orifice (24) of the first plate (101) correspond to the first orifice (21), the second orifice (22), the third orifice (23) and the fourth orifice (24) of the second plate (102) respectively, the heat exchange core (11) correspondingly forms a first pore canal (31), a second pore canal (32), a third pore canal (33) and a fourth pore canal (34), wherein the first pore canal (31) and the second pore canal (32) are part of a first flow channel, and the third pore canal (33) and the fourth pore canal (34) are part of a second flow channel;

The reinforcing structure (40) of the third plate (103) comprises a first reinforcing structure (401) and a second reinforcing structure (402), and the reinforcing structure (40') of the fourth plate (104) comprises a third reinforcing structure (403) and a fourth reinforcing structure (404);

The projection of the first reinforcing structure (401) on the plane and the projection of the third reinforcing structure (403) on the plane are overlapped with the projection of the first pore canal (31) on the plane in a plane perpendicular to the stacking direction of the plates, and the projection of the second reinforcing structure (402) on the plane and the projection of the fourth reinforcing structure (404) on the plane are overlapped with the projection of the second pore canal (32) on the plane;

One side of the first reinforcing structure (401) is attached to and fixed to at least a part of the area of the third reinforcing structure (403), the other side of the first reinforcing structure is attached to and fixed to at least a part of the area of the first side plate (14), one side of the second reinforcing structure (402) is attached to and fixed to at least a part of the area of the fourth reinforcing structure (404), and the other side of the second reinforcing structure is attached to and fixed to at least a part of the area of the first side plate (14).

6. A plate heat exchanger (10) according to claim 5, wherein the first portholes (31) and the second portholes (32) are located on both sides of the plate heat exchanger (10) in the length direction, respectively, wherein the first portholes (31) and the second portholes (32) are arranged diagonally or the first portholes (31) and the second portholes (32) are located on the same side in the width direction of the plate heat exchanger.

7. A plate heat exchanger (10) according to claim 6, wherein the fourth plate (104) is provided with a third porthole (23) and a fourth porthole (24), wherein the third porthole (23) of the fourth plate (104), the third porthole (23) of the first plate (101) and the third porthole (23) of the second plate (102) are coaxially arranged, wherein the fourth porthole (24) of the fourth plate (104), the fourth porthole (24) of the first plate (101) and the fourth porthole (24) of the second plate (102) are coaxially arranged;

The third plate (103) further comprises a fifth reinforcing structure (405) and a sixth reinforcing structure (406), the projection of the fifth reinforcing structure (405) on the plane is overlapped with the projection of the third pore canal (33) on the plane in a plane perpendicular to the stacking direction of the plates, the projection of the sixth reinforcing structure (406) on the plane is overlapped with the projection of the fourth pore canal (34) on the plane, the fifth reinforcing structure (405) of the third plate (103) is at least partially attached and fixed to the first side plate (14), and the sixth reinforcing structure (406) of the third plate (103) is at least partially attached and fixed to the first side plate (14).

8. A plate heat exchanger (10) according to claim 7, wherein the fifth (405) and sixth (406) reinforcing structures of the third plate (103) are each flat plate structures integrally formed with the rest of the third plate (103);

The third plate (103) and the fourth plate (104) form a first inter-plate channel therebetween, the fourth plate (104) is arranged around the plate surface on the periphery of the third orifice (23) and spaced from the third plate (103), the fourth plate (104) is arranged around the plate surface on the periphery of the fourth orifice (24) and spaced from the third plate (103), the third orifice (23) and the fourth orifice (24) of the fourth plate (104) are both communicated with the first inter-plate channel, and the first inter-plate channel is a part of the second circulation channel.

9. A plate heat exchanger (10) according to claim 2, wherein the third plate (103) has a first plate portion (2001), the third plate (103) being further provided with a first boss portion (201) protruding from its first plate portion (2001) in a direction away from the first side plate (14), the first boss portion (201) forming a recessed area (1031) at a side of the third plate (103) close to the first side plate (14), at least part of the first boss portion (201) forming a reinforcing structure of the third plate (103);

The first side plate (14) comprises a main body part (141) and a second boss part (203), the second boss part (203) protrudes towards the side close to the third plate (103) relative to the main body part (141), the second boss part (203) is at least partially positioned in the concave area (1031), and the first boss part (201) and the second boss part (203) are at least partially attached and fixed.

10. A plate heat exchanger (10) according to claim 9, wherein the second boss portion (203) is integrally formed with the main body portion (141) or wherein the second boss portion (203) is welded to the main body portion (141) as a unitary structure.