CN216954157U - Aluminum brazing plate type heat exchanger - Google Patents

Abstract

The utility model provides an aluminum brazing plate type heat exchanger, which comprises an upper end plate, a core body and a lower end plate which are sequentially stacked from top to bottom and brazed into a whole, wherein the core body comprises a plurality of heat exchange plates which are sequentially stacked from top to bottom to form a cold medium cavity and a heat medium cavity which are alternately distributed, the heat exchange plates are provided with flanges and annular bosses, the flanges comprise mistake-proof notches, first flange planes and second flange planes, the annular bosses are provided with end faces and through holes, and any one, any two or all of the first flange planes, the second flange planes and the end faces of the plurality of heat exchange plates are brazing faces. The utility model solves the problems of poor welding of the edges of the plates, poor quality of welding seams, low strength, incapability of bearing larger working pressure and the like when the traditional plate heat exchanger structure is produced by adopting aluminum or aluminum alloy materials, and can improve the assembly efficiency and prevent assembly errors.

Description

Aluminum brazing plate type heat exchanger

Technical Field

The utility model belongs to the technical field of heat exchangers, and particularly relates to an assembly structure and a brazing structure of an aluminum brazing plate type heat exchanger.

Background

The plate heat exchanger is a high-efficiency compact heat exchanger, and is widely applied to the fields of petroleum, chemical industry, machinery, energy and the like due to the advantages of high heat exchange efficiency, small volume, light weight and the like.

The plate heat exchanger mainly has two types of detachable type and brazing type, the common materials are stainless steel, titanium alloy, nickel alloy and the like, the materials are heavy in weight and high in price, and the aluminum alloy material is relatively low in price, good in plasticity, small in density, large in heat conductivity coefficient and certain in strength, and can replace expensive materials.

The plate heat exchanger made of aluminum alloy is less, and is only applied to a small amount in the automobile industry at present, but the heat exchanger is smaller in size. The plate heat exchanger has the advantages that the plate heat exchanger is required to have larger heat exchange amount and larger volume in the application of the fields of engineering machinery, wind power, special equipment and the like.

If the aluminum brazing plate type heat exchanger is produced by adopting the existing plate type heat exchanger structure, the problems of poor welding quality and the like of the edge of a plate sheet are easy to occur in the production process, the strength is not high, and the aluminum brazing plate type heat exchanger cannot bear larger working pressure.

The applicant filed a chinese utility model patent application entitled aluminum brazed plate heat exchanger on 2022, month 1 and month 5, application number 202220019954.7, in this application, the aluminum brazed plate heat exchanger adopts the middle chamber design, namely, the middle chamber as the safety chamber is designed between the hot edge medium runner and the cold edge medium runner that link to each other, and adopt the non-diagonal flow mode (namely unilateral flow) in the hot edge medium runner or the cold edge medium runner, the aluminum brazed plate heat exchanger is suitable for the occasion that the loss is great or very dangerous when cold and hot medium string chamber leaks, the advantage is high in safety, but the shortcoming is that the mould is with high cost (needs many sets of mould combination processing), the volume is great, the bearing capacity is lower, because the middle chamber does not participate in the heat transfer under the same volume condition and leads to its heat transfer performance to reduce.

However, for the occasion with relatively low damage of the leakage serial cavity, if the aluminum brazing plate type heat exchanger with the middle cavity is continuously adopted, the actual requirement cannot be met, especially for the application occasion with relatively low damage of the leakage serial cavity and relatively high requirements on heat exchange performance, volume and pressure bearing capacity, on the other hand, the number of processing dies is increased due to the existence of the middle cavity structure, and the processing complexity is increased. For the above reasons, there is a need for a new aluminum brazed plate heat exchanger structure without an intermediate chamber and having better heat exchange performance, volume and pressure-bearing capacity than the conventional plate heat exchanger.

Disclosure of Invention

The utility model aims to overcome the defects and provide the aluminum brazing plate type heat exchanger with high pressure resistance and high heat exchange efficiency so as to solve the problems that the edges of plates are not welded, the quality of welding seams is poor, the strength is not high, larger working pressure cannot be borne and the like when the traditional plate type heat exchanger structure is produced by adopting aluminum or aluminum alloy materials.

In order to achieve the purpose, the utility model is realized by the following technical scheme:

an aluminum brazing plate type heat exchanger comprises an upper end plate, a core body and a lower end plate which are stacked and brazed into a whole from top to bottom,

the core includes that the polylith from the top down piles up's heat transfer board in proper order, has the round turn-ups along the circumference edge of each heat transfer board, and it has four medium circulation holes to open on the face of heat transfer board, and four medium circulation holes are located four summits points of plane quadrangle respectively, wherein:

the flanging comprises a first flanging plane and a second flanging plane which are parallel but not in the same plane, the first flanging plane and the second flanging plane are parallel to the plate surface of the heat exchange plate and are separated on two sides of the plate surface of the heat exchange plate, and the flanging is also provided with a mistake-proofing notch;

an annular boss is arranged in the medium circulation hole, the edge of the annular boss is connected with the edge of the medium circulation hole, and a through hole is formed in the end face of the annular boss;

in the four annular bosses corresponding to the four medium circulation holes on the same heat exchange plate, the end surfaces of the two annular bosses are coplanar with the first flanging plane, the end surfaces of the other two annular bosses are coplanar with the second flanging plane, the end surfaces of the annular bosses in the two medium circulation holes at the two ends of the diagonal line of the planar quadrangle are in the same plane, and the end surfaces of the annular bosses in the two medium circulation holes at the two ends of any one edge of the planar quadrangle are in different planes;

connecting lines of two annular bosses, the end faces of which are in the same plane, on the same heat exchange plate form core body mounting lines, the same core body mounting lines of a plurality of heat exchange plates are in the same plane, any three adjacent core body mounting lines in the plane are alternately arranged according to the rule of superposition, interval or interval and superposition, the plane is perpendicular to the plate faces of the heat exchange plates, and at the moment, the mistake-proofing notches on the heat exchange plates are positioned on the same side surface of the core body and are on the same straight line; it should be noted that two core body installation lines are arranged on one heat exchange plate, and the "same core body installation line" of a plurality of heat exchange plates refers to that when the plurality of heat exchange plates are assembled, one of the core body installation lines is selected in a unified manner, for example, the core body installation line formed by connecting two annular bosses on the heat exchange plate, which are coplanar with a first flanging plane, or the core body installation line formed by connecting two annular bosses on the heat exchange plate, which are coplanar with a second flanging plane, is selected in a unified manner, and different core body installation lines are not allowed to be used in a mixed manner;

any one, any two or all of the first flanging plane, the second flanging plane and the end faces of the heat exchange plates in the core body are brazing surfaces.

Furthermore, a heat medium inlet, a cold medium inlet, a heat medium outlet and a cold medium outlet are arranged on the upper end plate.

Furthermore, bosses are arranged on the end face of the lower end plate, which is in contact with the core body, the number and the positions of the bosses are consistent with those of the annular bosses on the heat exchange plate in the core body, and the outer diameter of the end face of each boss is larger than or equal to the diameter of the through hole on the end face of the annular boss on the heat exchange plate.

Furthermore, a corrugated structure is arranged on the surface of the heat exchange plate, and the height of the corrugated structure is smaller than or equal to the distance between the first flanging plane and the second flanging plane.

Furthermore, the surface of the heat exchange plate is a smooth plane.

Further, when the face of heat transfer board is smooth plane, aluminium system brazing sheet heat exchanger still includes the fin, the fin is located between two adjacent heat transfer boards that pile up, opens on the fin have quantity and the position all with the heat transfer board on the hole or the breach that medium flow hole is the same.

The heat exchange plate with the corrugated structure or the smooth plane heat exchange plate with the fins can not exist in the same heat exchanger core body simultaneously, the fins are placed only in a matched mode when the smooth plane heat exchange plate is adopted, and the fins are not placed when the heat exchange plate with the corrugated structure is adopted.

Alternatively, the fins are serrated fins.

Alternatively, the hot medium inlet, the cold medium inlet, the hot medium outlet and the cold medium outlet are connected with nozzles or flange joints.

As an option, a brazing filler metal layer covers the surface where the upper end plate and the heat exchange plate are assembled; the surface of the lower end plate assembled with the heat exchange plate is covered with a brazing filler metal layer; and brazing filler metal layers are coated on the two sides of the heat exchange plate.

Alternatively, a layer of cooling medium flow channel is arranged between the lower end surface of the upper end plate and the upper end surface of the core body, and a layer of cooling medium flow channel is arranged between the upper end surface of the lower end plate and the lower end surface of the core body.

Compared with the prior art, the aluminum brazing plate type heat exchanger has the following advantages:

firstly, the plate-adopted heat exchanger is made of aluminum or aluminum alloy materials, so that the weight of the heat exchanger can be effectively reduced, the material cost is reduced, and the heat exchange efficiency is improved;

secondly, the flanging structure and the annular boss structure of the heat exchange plate are beneficial to the brazing process, especially the assembly area and the brazing area are increased, the quality of the edge weld joint can be effectively improved, and the strength of the brazed plate heat exchanger can also be improved;

thirdly, the core body formed by stacking the heat exchange plates, the upper end plate and the lower end plate are brazed into a whole, so that the brazed plate heat exchanger with good sealing performance can be obtained;

fourthly, compared with the traditional corrugated plate, the smooth heat exchange plate with the fins can effectively improve the heat exchange efficiency and the pressure bearing capacity of the plate heat exchanger;

fifthly, heat exchange is carried out in the cold medium cavity and the hot medium cavity in a diagonal flow mode to form a branched flow, so that the heat exchange performance is better;

sixth, compare the aluminium system brazing sheet heat exchanger that has middle chamber (safe chamber), when the use occasion is not high to the requirement of cold and hot medium cluster chamber leakage, can improve the performance of heat exchanger by a wide margin, reduce the heat exchanger volume, improve the heat exchanger bearing capacity, save mould cost (mould quantity reduction) and processing complexity.

The aluminum brazing plate type heat exchanger has the advantages that the structural characteristics and the heat exchange performance can meet the requirements of the fields of engineering machinery, wind power, special equipment and the like.

Drawings

FIG. 1 is a schematic structural view of an aluminum brazed plate heat exchanger of the present invention;

FIG. 2 is an exploded view of the aluminum brazed plate heat exchanger of the present invention;

FIG. 3 is a schematic diagram of a core structure of the heat exchange plate of the present invention using corrugated plates;

FIG. 4 is a schematic view of a core structure of the present invention employing a smooth sheet with fins as a heat exchange plate;

FIG. 5 is a schematic front view of a single corrugated sheet as a heat exchange plate in the present invention;

FIG. 6 is a schematic front view of a single smooth plate as a heat exchange plate in the present invention;

FIG. 7 is a schematic front view of a monolithic fin of the present invention;

FIG. 8 is a schematic view of an assembly structure of two adjacent corrugated sheets as heat exchange plates in the core of the present invention;

FIG. 9 is a schematic view of the distribution of hot and cold media cavities within the core of the present invention;

FIG. 10 is a schematic view of a mistake-proof slit in the core of the present invention;

in the figure: 1-hot medium inlet, 2-cold medium inlet, 3-cold medium outlet, 4-hot medium outlet, 5-core, 6-upper end plate, 7-lower end plate, 8-cold medium cavity, 9-hot medium cavity, 10-corrugated plate, 11-smooth plate, 12-fin, 13-second flanging plane, 14-end surface, 15-first flanging plane and 16-mistake-proofing notch.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments, which are exemplary and are not intended to limit the utility model in any way.

The aluminum brazed plate heat exchanger of the present invention comprises an upper end plate 6, a core 5 and a lower end plate 7, wherein:

the upper end plate 6 is provided with four medium circulation holes which are respectively communicated with the hot medium inlet 1, the hot medium outlet 4, the cold medium inlet 2 and the cold medium outlet 3, and a layer of cold medium flow channel is formed between the upper end plate 6 and the core body 5;

a layer of cold medium flow channel is formed between the lower end plate 7 and the core body 5, and medium circulation holes are not formed in the lower end plate 7;

the core body 5 is formed by stacking and assembling a plurality of heat exchange plates, wherein the heat exchange plates can be corrugated plates 10 or smooth plates 11 for placing fins 12. The heat exchange plate comprises four medium flow through hole structures which are positioned on the plate surface of the heat exchange plate and distributed at the positions of four vertexes of a plane quadrangle; an annular boss structure is arranged in the medium circulation hole, the edge of the annular boss is connected with the edge of the medium circulation hole in the heat exchange plate, the protruding directions of the two annular bosses at the two ends of the diagonal line of the plane quadrangle are consistent (both are upwards protruding or downwards protruding), the protruding directions of the two annular bosses at the two ends of the side edge of the plane quadrangle are opposite, the end surface 14 of the annular boss is a surface for stacking and attaching adjacent heat exchange plate sheets and can also be used as a brazing surface, the end surface 14 is provided with a through hole, and the through hole is used as the medium circulation hole. The annular boss structural characteristics of two adjacent heat exchange plates are mutually symmetrical by taking the attached surfaces as symmetrical surfaces. There is the turn-ups along the circumference edge profile of heat transfer board, has two turn-ups planes that are not in the coplanar and lie in heat transfer board face both sides face respectively on the turn-ups, and the turn-ups plane is two adjacent heat transfer board and piles up the surface of laminating, also can regard as the face of brazing, still opens mistake proofing incision 16 on the turn-ups, and mistake proofing incision 16 can not be located the turn-ups intermediate position to ensure to assemble correctly. Among the four end faces 14 of the annular protrusion on the heat exchange plate, two end faces 14 at two ends of one diagonal line are on the same plane and coplanar with one of the two flanging planes with different heights, and two end faces 14 at two ends of the other diagonal line are also on the same plane and coplanar with the other of the flanging planes with different heights, so that one heat exchange plate forms three planes of an upper plane (the annular boss end face and the flanging plane), a middle plane (the plate surface of the heat exchange plate) and a lower plane (the annular boss end face and the flanging plane) for assembly or brazing. Fig. 8 shows the above situation, where the flanges are in a zigzag shape, and include a first flange plane 15 and a second flange plane 13, where the first flange plane 15 and the second flange plane 13 are parallel to the plate surface of the heat exchange plate, the annular bosses are four identical circular truncated cones, and the end surfaces 14 of the circular truncated cones are provided with through holes, and the through holes have the same aperture, and are used for medium flow, and among the four end surfaces 14 on the same heat exchange plate, there are two end surfaces 14 coplanar with the second flange plane 13 (the right end in fig. 8 shows this situation), and the other two end surfaces 14 are coplanar with the first flange plane 15 (not shown in fig. 8).

Connecting lines of two annular bosses on the same heat exchange plate and with the end face 14 in the same plane form core body mounting lines, for example, diagonal connecting lines ab and cd shown in fig. 6 are core body mounting lines at two different positions on the same heat exchange plate, when a plurality of heat exchange plates are stacked to form a core body 5, the same core body mounting lines of the plurality of heat exchange plates are in the same plane (for example, the plane is either all ab or cd but cannot contain both ab and cd), and any three adjacent core body mounting lines in the plane are alternately arranged according to a superposition, interval or interval and superposition rule (for example, when all the planes are ab, in any three continuously adjacent ab, the three adjacent core body mounting lines are alternately arranged from top to bottom according to a mode that the first ab is superposed with the second ab, the second ab is spaced with the third ab, or the first ab is spaced with the second ab, and the second ab is superposed with the third ab), the plane is perpendicular to the plate surfaces of the heat exchange plates, and the plane is perpendicular to the plate surfaces of the heat exchange plates, at the moment, the mistake proofing notches 16 on the plurality of heat exchange plates are positioned on the same side surface of the core body 5 and are positioned on the same straight line; when the assembly requirements are met, the annular bosses and the flanges on the heat exchange plates form cold medium cavities 8 and hot medium cavities 9 which are alternately distributed in space, the principle is that the height difference between the end surfaces 14 of the annular bosses on the heat exchange plates and different flange planes on the flanges is utilized to ensure that a plurality of heat exchange plates form cavities which are mutually communicated or isolated through the joint or separation of the end surfaces 14 and the joint or separation of the flange planes when the heat exchange plates are stacked, then media with different temperatures are introduced through the medium flow through holes to form the cold medium cavities 8 and the hot medium cavities 9 which are alternately distributed in the core body 5, the diagonal line of the core body installation of the heat exchange plates can ensure that all the heat exchange plates are assembled according to requirements in the same plane, and finally realize heat exchange, but the mode is not intuitive, all the utility model open a mistake-proof notch 16 on the flanges of the heat exchange plates, when the mistake-proof notches 16 are on the same side surface of the core body 5 and are positioned on a vertical straight line, the assembly direction of the heat exchange plate is correct, and the heat exchange plate can be directly and rapidly judged by naked eyes.

The heat exchange plate can be a corrugated plate 10 or a smooth plate 11, and the corrugated plate 10 and the smooth plate 11 are provided with annular bosses, turned edges, medium flow through holes and mistake proofing notches 16; and fins 12 are arranged between two adjacent smooth plates 11, so that the heat exchange efficiency and the strength are improved.

The plurality of heat medium cavities 9 are communicated to form a heat medium flow passage, and the plurality of cold medium cavities 8 are communicated to form a cold medium flow passage.

As a preferred technical scheme, the number of the heat exchange plates in the core body 5 is an even number, the upper end plate 6 and the lower end plate 7 both participate in heat exchange, and the number of the cold medium cavities 8 is one layer more than that of the hot medium cavities 9.

As a preferred technical scheme, a nozzle or a flange joint can be connected to the heat medium inlet 1, the heat medium outlet 4, the cold medium inlet 2 and the cold medium outlet 3.

As a preferred technical scheme, the upper end plate 6 is similar to the lower end plate 7 in structure, and the lower end plate 7 is of a boss structure corresponding to the positions of four medium circulation holes in a heat exchange plate in the core body 5, so that a cold medium cavity 8 and a hot medium cavity 9 can be sealed. The material thickness of the upper end plate 6 and the lower end plate 7 is slightly thicker than the material thickness of the heat exchanger plates.

As a preferred technical scheme, the fins 12 are saw-tooth fins.

As a preferred technical solution, the internal corrugations of the corrugated plate 10 are W-shaped and distributed on the upper and lower surfaces of the plate, the depth of the corrugations is the same as the overall thickness of the plate, and the corrugation directions of two adjacent corrugated plates 10 are opposite.

As a preferred technical scheme, the upper surface and the lower surface of the heat exchange plate are covered with brazing filler metal layers.

As a preferred solution, the surfaces of the upper end plate 6 and the lower end plate 7 facing the core 5 are covered with a solder layer.

Referring to fig. 1 to 10 in the specification, the aluminum brazed plate heat exchanger in the present embodiment specifically includes an upper end plate 6, a core 5, a lower end plate 7, a nozzle, a flange joint, and the like, where the core 5 is formed by stacking and assembling a plurality of heat exchange plates, which may be corrugated plates 10 or smooth plates 11 on which fins 12 are placed.

In the present embodiment, as shown in fig. 2, the upper end plate 6 is disposed at the topmost layer of the plate heat exchanger, the lower end plate 7 is disposed at the lowermost layer of the plate heat exchanger, and the core 5 is disposed between the upper end plate 6 and the lower end plate 7.

As shown in fig. 2 to 4, the medium circulation holes on the upper end plate 6 are distributed at four vertices of a rectangle, the four annular bosses on the heat exchange plate are distributed at four vertices of the same rectangle, the four annular bosses have the same size, and the through holes on the end surface 14 have the same aperture, so as to finally form four cold and hot medium flow channels perpendicular to the plate surface of the heat exchange plate, as shown in fig. 2 and 3, and the cold medium and the hot medium exchange heat in the cavities on the two side surfaces of the heat exchange plate through the heat exchange plate, and then converge into or flow out of the respective flow channels.

In the present embodiment, as shown in fig. 9, the heat exchange plates are stacked, so that the cores 5 spatially form the cold medium cavities 8 and the hot medium cavities 9 which are alternately distributed, and at this time, it can be seen that the same core installation lines of a plurality of heat exchange plates are in the same plane (in fig. 9, the connection line of the end face 14 of the heat exchange plate coplanar with the first flanging plane 15 is collectively selected as the core installation line, corresponding to the end face 14 of the ring-shaped boss on the left side in fig. 9, any three adjacent core installation lines are alternately arranged in the plane according to the rule of superposition, interval or interval and superposition, and the end face 14 of the ring-shaped boss on the right side in fig. 9 is coplanar with the second flanging plane 13, which is another core installation line, and this core installation line is not used in the present embodiment), and this plane is perpendicular to the plate surface of the heat exchange plates. The number of the heat exchange plates depends on the actual heat exchange amount and the volume requirement of the heat exchanger, the heat exchange plates, the upper end plate 6 and the lower end plate 7 form a whole through brazing, and finally, pipe nozzles and flange joints are welded at four medium inlets on the upper surface of the upper end plate 6 and are used as cold and hot medium inlets and outlets of the heat exchanger.

By way of illustration, fig. 4 shows a stacking manner of heat exchange plates, where m1n1, m2n2 and m3n3 are the same core body mounting lines on three heat exchange plates stacked successively adjacent to each other, m1n1, m2n2 and m3n3 are in the same vertical plane, and m1n1 and m2n2 are overlapped (at this time, end faces 14 of corresponding annular bosses on two heat exchange plates are attached), the heat medium flows away from through holes of the annular bosses at two ends of the core body mounting line and does not enter a cavity between the two heat exchange plates, and the cold medium flows into the cavity between the two heat exchange plates from through holes of the annular bosses outside the core body mounting line and is in a diagonal flow state. And m2n2 and m3n3 are spaced (at this time, the end faces 14 of the corresponding annular bosses on the two heat exchange plates are not attached, and have a space to form a part of the cavity), the heat medium flows in from the through holes of the annular bosses at the two ends of the core body mounting line, enters the cavity between the two heat exchange plates and is in a diagonal flow state, and the cold medium directly flows out from the through holes of the annular bosses outside the core body mounting line and does not enter the cavity between the two heat exchange plates.

In this embodiment, all the members are made of aluminum or an aluminum alloy, and the members are integrated by brazing.

In this embodiment, as shown in fig. 8, the end surface 14 of the annular boss and the second flange plane 13 can effectively increase the welding area of the edge, and solve the problem that the edge is easy to be welded, and the first flange planes 15 on the two heat exchange plates participate in the formation of the cold medium cavity 8 or the heat medium cavity 9.

In the present embodiment, as shown in fig. 5 and 6, the flanges of the heat exchanger plate are provided with the mistake-proofing cuts 16, and the mistake-proofing cuts 6 cannot be processed in the middle of the flanges, either on the left side or on the right side. When assembling the core 5, the error-proof cut-outs 16 of two adjacent heat exchanger plates are in the same position to ensure error-free assembly. If the mistake-proofing slits 16 of a certain heat exchange plate are found to be on the other side or the other side on the same side during the assembly process, the heat exchange plate needs to be turned over or horizontally rotated by 180 degrees, so that the mistake-proofing slits 16 of all the heat exchange plates constituting the core body 5 are arranged in a vertical direction as a vertical line, as shown in fig. 10.

In this embodiment, when the requirement on the working pressure of the heat exchanger is not high, the corrugated plate 10 may be used as the heat exchange plate; when the working pressure is higher, the smooth plate 11 with the fins 12 can be selected, and the structure can effectively improve the bearing strength and the heat exchange effect of the heat exchanger. The smooth sheet 11 is similar in structure to the corrugated sheet 10 except for the presence of a corrugated structure inside. Two adjacent heat exchange plates are symmetrical with the attaching surface as a symmetrical surface, and the number of the required heat exchange plates is two no matter the corrugated plate 10 or the smooth plate 11 is adopted.

In this embodiment, the upper end plate 6 and the lower end plate 7 have similar structures, except that at four positions of the plate near the corners, the upper end plate 6 has a structure of a boss with a medium flow hole, and the lower end plate 7 has a circular boss without a medium flow hole (for blocking the medium flow on the heat exchange plate), however, the difference between the upper end plate 6 and the lower end plate 7 does not affect the manufacturing of the mold, and the structures of the upper end plate 6 and the lower end plate 7 can share one mold.

In this embodiment, in order to ensure the strength of the heat exchanger, the material thickness of the upper end plate 6 and the lower end plate 7 should be greater than that of the heat exchanger plates to ensure that different mounting structures can be welded on the upper end plate 6 and the lower end plate 7. The heat exchange plate is usually an aluminum alloy plate with a material thickness of 0.6-1.2 mm and a brazing filler metal layer on both sides, the upper end plate 6 and the lower end plate 7 are usually aluminum alloy plates with a material thickness of 2-3 mm and a brazing filler metal on one side, and the size specification of all the plates can be 200 x 600 mm.

The above embodiments are not intended to limit the scope of the present invention, and any variations, modifications, or equivalent arrangements made on the premise of the idea and the technical solution of the present invention may fall within the scope of the present invention.

Claims (10)

1. An aluminum brazed plate heat exchanger comprising, from top to bottom, an upper end plate (6), a core (5) and a lower end plate (7) stacked and brazed in sequence, characterized in that:

core (5) include the heat transfer board that the polylith from the top down stacked gradually, have the round turn-ups along the circumference edge of each heat transfer board, it has four medium circulation holes to open on the face of heat transfer board, and four medium circulation holes are located four summits points of plane quadrangle respectively, wherein:

the flanging comprises a first flanging plane (15) and a second flanging plane (13) which are parallel but not in the same plane, the first flanging plane (15) and the second flanging plane (13) are parallel to the plate surface of the heat exchange plate and are separated on two sides of the plate surface of the heat exchange plate, and the flanging is also provided with an error-proof notch (16);

an annular boss is arranged in the medium circulation hole, the edge of the annular boss is connected with the edge of the medium circulation hole, and a through hole is formed in the end face (14) of the annular boss;

in four annular bosses corresponding to the four medium circulation holes on the same heat exchange plate, the end surfaces (14) of two annular bosses are coplanar with a first flanging plane (15), the end surfaces (14) of the other two annular bosses are coplanar with a second flanging plane (13), the end surfaces (14) of the annular bosses in the two medium circulation holes at the two ends of the diagonal line of the plane quadrangle are in the same plane, and the end surfaces (14) of the annular bosses in the two medium circulation holes at the two ends of any one side of the plane quadrangle are in different planes;

when a plurality of heat exchange plates are stacked to form a core body (5), the same core body installation lines of the plurality of heat exchange plates are in the same plane, any three adjacent core body installation lines in the plane are alternately arranged according to the rule of coincidence, interval or interval and superposition, the plane is perpendicular to the plate surfaces of the heat exchange plates, and at the moment, the mistake-proofing notches (16) on the plurality of heat exchange plates are positioned on the same side surface of the core body (5) and on the same straight line;

any one, any two or all of a first flanging plane (15), a second flanging plane (13) and an end face (14) of a plurality of heat exchange plates in the core body (5) are brazing surfaces.

2. An aluminum brazed plate heat exchanger as recited in claim 1, wherein: the upper end plate (6) is provided with a heat medium inlet (1), a cold medium inlet (2), a heat medium outlet (4) and a cold medium outlet (3).

3. An aluminum brazed plate heat exchanger as recited in claim 1, wherein: bosses are arranged on the end face, which is in contact with the core body (5), of the lower end plate (7), the number and the positions of the bosses are consistent with those of the annular bosses on the heat exchange plate in the core body (5), and the outer diameter of the end face of each boss is larger than or equal to the diameter of a through hole on the end face (14) of the annular boss on the heat exchange plate.

4. An aluminum brazed plate heat exchanger as recited in claim 1, wherein: the plate surface of the heat exchange plate is provided with a corrugated structure, and the height of the corrugated structure is less than or equal to the distance between the first flanging plane (15) and the second flanging plane (13).

5. An aluminum brazed plate heat exchanger as recited in claim 1, wherein: the surface of the heat exchange plate is a smooth plane.

6. An aluminum brazed plate heat exchanger according to claim 5, wherein: still include fin (12), fin (12) are located between two adjacent heat transfer boards that stack, and it has the same hole or breach of quantity and position all with medium flow through hole on the heat transfer board to open on fin (12).

7. An aluminum brazed plate heat exchanger according to claim 6, wherein: the fins (12) are saw-tooth fins.

8. An aluminum brazed plate heat exchanger according to claim 2, wherein: and the heat medium inlet (1), the cold medium inlet (2), the heat medium outlet (4) and the cold medium outlet (3) are connected with nozzles or flange joints.

9. An aluminum brazed plate heat exchanger as recited in claim 1, wherein:

the surface of the upper end plate (6) assembled with the heat exchange plate is covered with a brazing filler metal layer;

the surface of the lower end plate (7) assembled with the heat exchange plate is covered with a brazing filler metal layer;

and brazing filler metal layers are coated on the two sides of the heat exchange plate.

10. An aluminum brazed plate heat exchanger as recited in claim 1, wherein: a layer of cold medium flow channel is arranged between the lower end face of the upper end plate (6) and the upper end face of the core body (5), and a layer of cold medium flow channel is arranged between the upper end face of the lower end plate (7) and the lower end face of the core body (5).

Images