CN112432542A - Heat exchanger - Google Patents
Heat exchanger Download PDFInfo
- Publication number
- CN112432542A CN112432542A CN202010066150.8A CN202010066150A CN112432542A CN 112432542 A CN112432542 A CN 112432542A CN 202010066150 A CN202010066150 A CN 202010066150A CN 112432542 A CN112432542 A CN 112432542A
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- Prior art keywords
- wall portion
- heat exchange
- wall
- plate
- channel
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- 238000009826 distribution Methods 0.000 claims abstract description 54
- 238000004891 communication Methods 0.000 claims abstract description 35
- 238000007789 sealing Methods 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000003825 pressing Methods 0.000 description 19
- 239000003507 refrigerant Substances 0.000 description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 17
- 238000005219 brazing Methods 0.000 description 10
- 230000002093 peripheral effect Effects 0.000 description 7
- 239000000110 cooling liquid Substances 0.000 description 4
- 230000004907 flux Effects 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 229910000679 solder Inorganic materials 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F11/00—Arrangements for sealing leaky tubes and conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The application relates to the technical field of heat exchange, in particular to a heat exchanger, which comprises a flow collecting piece, wherein the flow collecting piece comprises a main plate, a middle plate and an inner plate, and the middle plate is positioned between the main plate and the inner plate; the middle plate further comprises distribution grooves in one-to-one correspondence with the connecting structures and distribution groove walls located between the distribution grooves, the main plate further comprises a first channel extending along the distribution groove arrangement direction and a plurality of second channels extending towards the middle plate, the first channel is communicated with the second channels, the second channels penetrate through the main plate and form communication holes on the surface of the main plate, the communication holes are located in areas corresponding to the distribution grooves, and at least two communication holes are arranged in each area.
Description
Technical Field
The application relates to the technical field of heat exchange, in particular to a heat exchanger.
Background
As shown in fig. 1, the related heat exchanger includes a header 131, the header 131 is formed with refrigerant communication flow paths 231a to 231f, the refrigerant communication flow paths 231a to 231f are communicated with a main refrigerant flow path 131a and extend in a direction orthogonal to the lengthwise direction of the header 131, and communication holes 233a to 233f are formed at the bottom thereof so as to communicate with respective channels of heat exchange tubes, but one communication hole per heat exchange tube, the distribution of refrigerant is not uniform.
Disclosure of Invention
In view of the above-mentioned problems, the present application provides a heat exchanger that improves refrigerant distribution uniformity.
In order to achieve the purpose, the following technical scheme is adopted in the application:
a heat exchanger comprises a flow collecting piece and a heat exchange tube, wherein the heat exchange tube is fixedly connected with the flow collecting piece and is arranged at the connection part in a sealing mode, the end part of the heat exchange tube is positioned in the flow collecting piece, and the inner cavity of the flow collecting piece is communicated with the tube cavity of the heat exchange tube;
the flow collecting piece comprises a main plate and a connecting plate, the connecting plate comprises a third wall part, the main plate comprises a fourth wall part, and the third wall part and the fourth wall part are fixedly connected; the connecting plate also comprises distributing grooves corresponding to the heat exchange tubes one by one and distributing groove walls positioned between the distributing grooves, and the peripheral edges of the third wall part and the fourth wall part are at least less than the peripheral edges of the distributing groove walls in a sealing mode;
the main plate further comprises a first channel and a second channel, the first channel extends along the arrangement direction of the distribution grooves, one end of the second channel is communicated with the first channel, the other end of the second channel is communicated with the distribution grooves, the second channel penetrates through the fourth wall and forms a communication hole in the fourth wall, and at least two communication holes are correspondingly formed in one distribution groove.
Each distribution groove of the heat exchanger is correspondingly provided with at least two communication holes, so that the refrigerant is divided by at least two second channels, and the refrigerant is distributed into the heat exchange tubes more uniformly.
In a possible embodiment, the at least two communication holes are arranged along the extending direction of the first channel, and are arranged to form two parallel rows of communication hole sets, two communication holes are correspondingly arranged in each distribution groove, and the two communication holes are distributed at intervals along the length direction of the distribution groove.
In one possible embodiment, the second channel extends from an edge of the first channel in a direction perpendicular to the end surface of the heat exchange tube, the communication hole has a diameter smaller than a radius of the first channel, and the communication hole has a diameter greater than or equal to a thickness of the heat exchange tube.
In a possible embodiment, the connecting plate further comprises a middle plate and an inner plate, the middle plate is located between the main plate and the inner plate, the inner plate comprises a first wall portion, the middle plate comprises a second wall portion and a third wall portion, the second wall portion and the third wall portion are located on two opposite sides of the middle plate, and the first wall portion and the second wall portion are fixedly connected;
the distribution groove is formed in the middle plate, and the end portion of the heat exchange tube is arranged in the distribution groove through the inner plate.
In a possible embodiment, the inner plate further includes a connection structure protruding from the first wall portion and a connection groove formed in the connection structure, the connection structure and the heat exchange tube are arranged in one-to-one correspondence, and the connection groove penetrates through the inner plate;
the connecting structure is located in the distribution groove, the outer wall of the connecting structure and the wall of the distribution groove are arranged in a sealing mode, the end portion of the heat exchange tube is arranged in the distribution groove through the connecting groove, and the outer wall of the heat exchange tube and the wall of the connecting groove are arranged in a sealing mode.
In a possible embodiment, the groove wall of the connecting groove is provided with a limiting part, the heat exchange tube is provided with a positioning part matched with the limiting part at the position close to the end part, the distance from the limiting part to the end surface of the connecting structure is smaller than the distance from the positioning part to the end surface of the heat exchange tube, and the end surface of the heat exchange tube is positioned outside the connecting groove.
In a possible embodiment, the main board further includes a fifth wall portion located on an opposite side of the fourth wall portion, the main board further includes a protruding portion protruding from the fifth wall portion, the protruding portion has opposite ends, and the first channel is formed between the two ends of the protruding portion.
In a possible embodiment, the second wall portion and the third wall portion are provided with rivet pressing connection holes, the fourth wall portion and the first wall portion are provided with rivet pressing protrusions, the rivet pressing protrusions are arranged in the corresponding rivet pressing connection holes, and the rivet pressing protrusions are in interference fit with hole walls of the rivet pressing connection holes.
In one possible embodiment, the heat exchanger comprises a shell and a pair of flow collecting pieces, wherein the flow collecting pieces are hermetically arranged at two ends of the shell, a heat exchange cavity is formed in the shell, the heat exchange tube penetrates through the heat exchange cavity, and two ends of the heat exchange tube are respectively connected with the two flow collecting pieces;
the current collecting piece is provided with a connecting part around the periphery of the current collecting piece, and the end face of the shell and the inner wall close to the end face are fixedly connected to the connecting part.
In a possible embodiment, the area of the fourth wall portion is larger than the area of the third wall portion, the connecting plate further includes a sixth wall portion perpendicular to the fourth wall portion, a connecting area is formed between the peripheral edge of the fourth wall portion and the peripheral edge of the sixth wall portion, the connecting portion includes the sixth wall portion and the connecting area, the end face of the housing is fixedly connected to the connecting area, and the inner wall of the housing near the end face is fixedly connected to the sixth wall portion.
Drawings
FIG. 1 is a schematic structural view of a related heat exchanger;
FIG. 2 is an overall view of a heat exchanger construction of an embodiment of the present application;
FIG. 3 is a partial sectional view of a heat exchanger according to an embodiment of the present application;
FIG. 4 is a schematic structural diagram of a housing according to an embodiment of the present application;
FIG. 5 is a schematic structural view of a current collector of an embodiment of the present application;
FIG. 6 is a schematic view of the assembly structure of the current collector and the heat exchange tube according to the embodiment of the present application;
FIG. 7 is a schematic view of a manifold disassembly configuration according to an embodiment of the present application;
fig. 8 is an exploded view of another perspective of a current collector according to an embodiment of the present application;
FIG. 9 is a schematic structural diagram of a heat exchange tube according to an embodiment of the present application;
FIG. 10 is a schematic view of the assembly structure of the current collector and the connection block according to the embodiment of the present application;
fig. 11 is a schematic view of another assembly structure of a current collector and a connecting pressing block according to an embodiment of the present application.
In the figure, 1 current collecting piece, 11 main board, 111 fourth wall part, 1111 area, 1112 riveting bulge, 112 first channel, 113 second channel, 1131 communication hole, 114 fifth wall part, 115 bulge part, 116 connector, 117 step part, 118 connecting sleeve, 12 middle board, second wall part 121, third wall part 122, 123 distribution groove, 124 distribution groove wall, 125 riveting connection hole, 126 sixth wall part, 127 connection area, 13 inner board, 131 first wall part, 1311 riveting bulge, 132 connection structure, 133 connection groove, 1331 spacing part, 14 connection part, 2 heat exchange pipe, 21 positioning part, 3 shell, 31 first connection pipe, 32 second connection pipe, 33 upper water shell, 34 lower water shell, S splicing gap, 35 connection wall, 36 connection end face, 4 connection pressing block, 5 heat exchanging piece and 6 lining board are arranged.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the terms "first," "second," and the like as used in the description and in the claims, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Similarly, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one; "plurality" means two or more than two. Unless otherwise indicated, "front", "rear", "lower" and/or "upper" and the like are for convenience of description and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items.
The flow collecting piece of the related heat exchanger adopts a multi-channel through hole and a heat exchange tube groove to form a refrigerant flow channel, so that on one hand, the thickness of the flow collecting piece is thicker, the machining is complex, and the raw material cost and the machining cost are higher; on the other hand, the refrigerant side has larger resistance at the position of the collecting piece due to the adoption of a multi-channel refrigerant circulation mode, so that the performance of the whole product is influenced. But with a single pass heat exchanger, the refrigerant distribution is not uniform. The application provides a heat exchanger of single channel, enables the refrigerant distribution more evenly.
The heat exchanger according to the exemplary embodiment of the present application will be described in detail below with reference to the accompanying drawings. The features of the following examples and embodiments can be supplemented or combined with each other without conflict.
As shown in fig. 2 to 4, the heat exchanger of the present application includes a pair of headers 1, a plurality of heat exchange tubes 2, a shell 3, two connecting compacts 4, a plurality of heat exchange members 5, and a liner 6. The two flow collecting pieces 1 are hermetically arranged at two ends of the shell 3, and the two connecting pressing blocks 4 are connected to the flow collecting pieces 1 and respectively used as an inlet connecting pressing block and an outlet connecting pressing block. A heat exchange cavity is formed in the shell 3, the heat exchange tubes 2 and the heat exchange pieces 5 are alternately arranged in the heat exchange cavity one by one along the length direction of the flow collecting piece 1, and the heat exchange pieces 5 and the heat exchange tubes 2 are fixed through brazing. The heat exchange piece 5 tightly attached to the inner wall of the shell 3 is fixed with the inner wall of the shell 3 by brazing. The heat exchange member 5 may be a corrugated fin, a louvered fin, a straight fin, a rectangular staggered-tooth fin, a pin fin, or the like.
The heat exchange tube 2 penetrates through the heat exchange cavity, two ends of the heat exchange tube 2 are respectively connected to the two current collecting pieces 1, and the end part of the heat exchange tube 2 is located in the current collecting pieces 1. Specifically, the outer wall of the heat exchange tube 2 and the flow collecting piece 1 are fixed through brazing, a connecting gap is sealed, and the inner cavity of the flow collecting piece 1 is communicated with the tube cavity of the heat exchange tube 2. As shown in fig. 9, the heat exchange tube 2 may be a microchannel flat tube, and a plurality of microchannel holes are formed along the width direction of the heat exchange tube, and the inner cavities of the two collectors 1 are communicated through the microchannel holes of the heat exchange tube 2.
The housing 3 is rectangular and has two opposite ends, which are free of side walls, for connecting the current collector 1. The shell 3 is a two-half shell and is divided into an upper water shell 33 and a lower water shell 34, the upper water shell 33 and the lower water shell 34 are symmetrically arranged, and both the upper water shell 33 and the lower water shell 34 are C-shaped. Two splicing gaps S vertical to the flow collecting piece 1 are formed between the upper water shell 33 and the lower water shell 34, the two splicing gaps S are positioned on two opposite sides of the whole shell 3, and the heat exchange cavity is a space surrounded by the upper water shell 33 and the lower water shell 34. Consequently, a welt 6 is placed to the lateral wall that is located casing 3 in concatenation gap S department, and welt 6 is fixed through brazing with casing 3, and the surface of welt 6 and the laminating of casing 3 can coat the solder flux, and the solder flux on 6 surfaces of welt melts and flows in concatenation gap S among the brazing process, plays the effect of shutoff concatenation gap S, simultaneously welt 6 has still increased the connection area that casing 3 is located concatenation gap S department, and welt 6 can increase casing 3 'S intensity, can effectively guarantee casing 3' S leakproofness again. In other embodiments, the housing 3 may be integrally formed (made of metal or plastic), or the upper water shell 33 and the lower water shell 34 of the housing 3 are connected by splicing or inserting in a staggered manner.
The casing 3 still is provided with first connecting pipe 31 and second connecting pipe 32, and first connecting pipe 31 and second connecting pipe 32 have the connector, and first connecting pipe 31 and second connecting pipe 32 set up respectively the casing 3 relative both sides are located respectively promptly on water shell 33 and the lower water shell 34, just first connecting pipe 31 with second connecting pipe 32 sets up on the lateral wall that does not have concatenation gap S, both with the lateral wall of casing 3 is perpendicular. In other embodiments, the first connecting pipe 31 and the second connecting pipe 32 may be disposed on the same side of the housing 3.
The first connecting pipe 31 and the second connecting pipe 32 may be connected to an external pipeline, and are configured to convey a cooling liquid into the heat exchange cavity or output the cooling liquid from the heat exchange cavity, where the cooling liquid enters the heat exchange cavity to exchange heat with the refrigerant in the heat exchange tube 2. The cooling liquid may be a mixture of water and ethanol, and the refrigerant may be a heat exchange medium such as R134A or carbon dioxide. The heat exchanger of the embodiment can be used for a heat management system of a vehicle air conditioner, such as a pure electric vehicle, and is used for cooling or heating a battery motor, refrigerating or heating a compartment, dehumidifying the compartment and the like.
As shown in fig. 5 to 9, the current collector 1 is a three-layer plate structure. The current collecting piece 1 comprises a main plate 11, a middle plate 12 and an inner plate 13, wherein the main plate 11, the middle plate 12 and the inner plate 13 are all in a plate shape and are formed through sectional materials respectively. Wherein the thickness of the middle plate 12 is greater than the thickness of the inner plate 13 and the main plate 11. The middle plate 12 is located between the main plate 11 and the inner plate 13, the inner plate 13 includes a first wall portion 131, the middle plate 12 includes a second wall portion 121 and a third wall portion 122, the main plate 11 includes a fourth wall portion 111, the first wall portion 131 and the second wall portion 121 are fixedly connected, and the third wall portion 122 and the fourth wall portion 111 are fixedly connected.
In other embodiments, the current collector 1 may be an integrally formed structure. Or, the current collecting piece is a two-layer plate structure, the current collecting piece comprises the main plate 11 and the connecting plate, or the connecting plate can be directly replaced by the middle plate 12. The main board 11 and the connecting board are both formed by processing sectional materials. The connecting plate includes a third wall portion 122, the main plate 11 includes a fourth wall portion 111, and the third wall portion 122 and the fourth wall portion 111 are fixedly connected by riveting or brazing. The connection plate further includes distribution grooves 123 corresponding to the heat exchange tubes 2 one to one, and distribution groove walls 124 between the distribution grooves 123, and the third wall part 122 and the fourth wall part 111 are sealingly disposed at least at the peripheral edges of the distribution groove walls 124. The outer wall of the heat exchange tube 2 is fixedly connected with the distributing groove wall 124 directly through brazing.
The three-layer plate structure of this embodiment realizes tight fit through the riveting process. Specifically, the second wall portion 121 and the third wall portion 122 are provided with rivet connection holes 125 at opposite positions near the edges, and the rivet connection holes 125 are milled by machining. After the three-layer board and the riveting die are positioned, the main board 11 and the inner board 13 are simultaneously riveted by the die, so that the fourth wall portion 111 is close to the edge thereof to form a riveting protrusion 1112, the first wall portion 131 is close to the edge thereof to form a riveting protrusion 1311, the riveting protrusion is directly formed in the corresponding riveting connection hole 125, and the riveting protrusion is in interference fit with the hole wall of the riveting connection hole 125, so that the main board 11, the middle board 12 and the inner board 13 are fixedly connected together. In other embodiments, the main plate 11, the intermediate plate 12, and the inner plate 13 may also be fixed by brazing. It should be noted that, for the convenience of riveting, a positioning hole (not shown) for positioning with the mold may be further provided on the three-layer plate.
The inner plate 13 further includes a connecting structure 132 protruding from the first wall portion 131, and a connecting groove 133 formed in the connecting structure 132, wherein the connecting structure 132 and the heat exchange tubes 2 are arranged in a one-to-one correspondence. The connection structure 132 is formed by punching, and the connection groove 133 penetrates the inner plate 13. The connecting groove 133 is divided into two sections, a first section is formed within the thickness range of the inner plate 13, a second section protrudes from the first wall portion 131, a reduced opening is formed between the first section and the second section of the connecting groove 133, and a limiting portion 1331 is formed by the reduced opening, so that the cross section of the second section of the connecting groove 133 is smaller than that of the first section. The limiting portion 1331 of this embodiment is an arc section formed on the groove wall of the connecting groove 133, so that the first section and the second section of the connecting groove 133 are in smooth transition.
The middle plate 12 further includes distribution grooves 123 corresponding one-to-one to the connection structures 132 and distribution groove walls 124 between the distribution grooves 123. The intermediate plate 12 is machined by profile machining to form the distribution groove 123 and simultaneously to form the distribution groove wall 124. The third wall part 122 and the fourth wall part 111 of the present embodiment are closely attached together, so that the distribution grooves 123 are independent from each other and do not communicate with each other, and the distribution grooves 123 extend in the width direction of the heat exchange tube 2 to form refrigerant flow channels. In other embodiments, the third wall portion 122 and the fourth wall portion 111 may be only tightly fitted around the periphery of the distribution groove 123.
The connecting structure 132 is located in the distribution groove 123, the outer wall of the connecting structure 132 and the wall 124 of the distribution groove are hermetically arranged, the end of the heat exchange tube 2 is placed in the distribution groove 123 through the connecting groove 133, and the outer wall of the heat exchange tube 2 and the wall of the connecting groove 133 are hermetically arranged. Specifically, the surface of the inner plate 13 of the present embodiment is coated with flux, so that when the heat exchanger passes through the furnace at a high temperature, the flux melts and enters the connection gap, so that the wall and the wall are sealed and fixed.
The heat exchange tube 2 is provided with the location portion 21 matched with the limiting portion 1331 near the two sides of the end portion in the width direction, the location portion 21 is a necking matched with the arc section of the connecting groove 133, therefore, the heat exchange tube 2 is also divided into two sections near the end portion, the end surface of the heat exchange tube 2 has a width W1, the main body section far away from the end surface has a width W2, and W1 is smaller than W2. The distance from the limiting part 1331 to the end surface of the connecting structure 132 is less than the distance from the positioning part 21 to the end surface of the heat exchange tube 2. Therefore, the end surface of the heat exchange tube 2 is located outside the connection groove 133 and in the distribution groove 123, so that the refrigerant can directly enter the heat exchange tube 2 after entering the distribution groove 123. In other embodiments, the end surface of the heat exchange tube 2 may be positioned inside the connection groove 133.
The main plate 11 further includes a first channel 112 extending along the arrangement direction of the distribution grooves 123, and a plurality of second channels 113 extending toward the fourth wall portion 111, the first channel 112 is communicated with the second channels 113, the second channels 113 penetrate the fourth wall portion 111 and form communication holes 1131 in the fourth wall portion 111, the communication holes 1131 are located in the corresponding areas 1111 of the distribution grooves 123, and two communication holes 1131 are provided in each of the areas 1111. The first passage 112 and the second passage 113 are both circular in cross-section.
The communication holes 1131 are arranged along the extending direction of the first channel 112, and two rows of communication hole sets are arranged in parallel, so that two communication holes 1131 are arranged in each of the regions 1111. The communication holes 1131 in each of the regions 1111 are spaced apart along the length of the distribution groove 123. That is, the distribution along the width direction of the heat exchange tube 2 enables the refrigerant distribution to be more uniform in the case where the number of microchannel holes covering the heat exchange tube 2 is large.
In the present embodiment, the second channel 113 extends from the edge of the first channel 112 in a direction perpendicular to the end surface of the heat exchange tube 2, i.e., the second channel 113 is tangential to the edge of the first channel 112. The diameter of the communication hole 1131 is smaller than the radius of the first channel 112, and the diameter of the communication hole 1131 is greater than or equal to the thickness H of the heat exchange tube 2, so that the communication hole 1131 can cover a larger number of channel holes of the heat exchange tube 2.
As shown in fig. 5, the current collecting member 1 is provided with a connecting portion 14 around its periphery, the case 3 has a connecting end surface 36, and a connecting wall 35 near the connecting end surface 36, and both the connecting end surface 36 and the connecting wall 35 are brazed to the connecting portion 14.
Specifically, the area of the fourth wall portion 111 is larger than the area of the third wall portion 122, the middle plate 12 further includes a sixth wall portion 126 perpendicular to the fourth wall portion 111, a connection area 127 is formed between the peripheral edge of the fourth wall portion 111 and the peripheral edge of the sixth wall portion 126, and the connection portion 14 includes the sixth wall portion 126 and the connection area 127.
The connection end surface 36 of the housing 3 is attached to the connection region 127, and the connection wall 35 of the housing 3 is attached to the sixth wall portion 126. Therefore, the housing 3 and the current collector 1 have better sealing performance. In other embodiments, the connecting end surface 36 and the connecting wall 35 may be fixed in the connecting portion 14 by gluing.
The main board 11 includes a fifth wall portion 114, the fifth wall portion 114 is located on the opposite side of the fourth wall portion 111, the main board 11 further includes a protrusion portion 115 protruding from the fifth wall portion 114, the protrusion portion 115 has opposite ends, and the first channel 112 is formed between the two ends of the protrusion portion 115. In other embodiments, both ends of the protruding portion 115 may be opened and closed with a closing cap, and the connection pressing piece 4 may be provided on a side wall between both ends of the protruding portion 115.
One end of the protruding part 115 can extend and be provided with a connecting head 116 in the direction far away from the current collecting part 1, the diameter of the connecting head 116 is smaller than that of the protruding part 115, and a step 117 is formed at the joint of the connecting head 116 and the protruding part 115. The connecting head 116 is used for connecting with the connecting pressing block 4.
As shown in fig. 10, a connecting sleeve 118 is fixedly arranged on the connecting head 116, the connecting sleeve 118 has a brazing layer, the connecting sleeve 118 functions as an adapter, auxiliary welding parts such as a soldering lug and the like are not needed when the connecting pressing block 4 is connected, and the structure is simple and reliable. The connecting sleeve 118 abuts against the step 117 toward the end face of the collecting part 1, and plays a role in positioning. The connecting pressing block 4 is internally provided with a channel, and the first channel 112 in the current collecting piece 1 is communicated with the channel of the connecting pressing block 4. The collecting piece 1 is connected to an external line via a connecting pressure piece 4, so that refrigerant can be fed into the first channel 112. In other embodiments, the connecting pressing block 4 and the connecting sleeve 118 may be screwed.
In another embodiment, as shown in fig. 11, the connector 116 has a solder composite layer. The connecting pressing block 4 is directly fixedly connected with the connecting head 116 through brazing, and the end face, facing the current collecting piece 1, of the connecting pressing block 4 abuts against the step part 117.
Although the present application has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application, and all changes, substitutions and alterations that fall within the spirit and scope of the application are to be understood as being covered by the following claims.
Claims (10)
1. The heat exchanger is characterized by comprising a flow collecting piece (1) and a heat exchange tube (2), wherein the heat exchange tube (2) is fixedly connected with the flow collecting piece (1) and is hermetically arranged at the joint, the end part of the heat exchange tube (2) is positioned in the flow collecting piece (1), and the inner cavity of the flow collecting piece (1) is communicated with the tube cavity of the heat exchange tube (2);
the flow collecting piece (1) comprises a main plate (11) and a connecting plate, the connecting plate comprises a third wall part (122), the main plate (11) comprises a fourth wall part (111), and the third wall part (122) and the fourth wall part (111) are fixedly connected; the connecting plate also comprises distributing grooves (123) corresponding to the heat exchange tubes (2) in a one-to-one mode and distributing groove walls (124) positioned between the distributing grooves (123), and the third wall part (122) and the fourth wall part (111) are arranged at least at the periphery of the distributing groove walls (124) in a sealing mode;
the main plate (11) further comprises a first channel (112) and a second channel (113), the first channel (112) extends along the arrangement direction of the distribution grooves (123), one end of the second channel (113) is communicated with the first channel (112), the other end of the second channel is communicated with the distribution grooves (123), the second channel (113) penetrates through the fourth wall portion (111) and forms a communication hole (1131) in the fourth wall portion (111), and at least two communication holes (1131) are correspondingly arranged in one distribution groove (123).
2. A heat exchanger according to claim 1, wherein the at least two communication holes (1131) are arranged along the extending direction of the first channel (112) and form two parallel rows of communication hole sets, two communication holes (1131) are correspondingly arranged in each distribution groove (123), and the two communication holes (1131) are distributed at intervals along the length direction of the distribution groove (123).
3. A heat exchanger according to claim 1 wherein the second channel (113) extends from the edge of the first channel (112) in a direction perpendicular to the end face of the heat exchange tube (2), the communication hole (1131) has a diameter smaller than the radius of the first channel (112), and the communication hole (1131) has a diameter greater than or equal to the thickness of the heat exchange tube (2).
4. A heat exchanger according to claim 1, wherein the connection plate further comprises an intermediate plate (12) and an inner plate (13), the intermediate plate (12) being located between the main plate (11) and the inner plate (13), the inner plate (13) comprising a first wall portion (131), the intermediate plate (12) comprising a second wall portion (121) and a third wall portion (122), the second wall portion (121) and the third wall portion (122) being located on opposite sides of the intermediate plate (12), the first wall portion (131) and the second wall portion (121) being fixedly connected;
the distribution groove (123) is provided to the middle plate (12), and the ends of the heat exchange tubes (2) are placed in the distribution groove (124) through the inner plate (13).
5. A heat exchanger according to claim 4, wherein the inner plate (13) further comprises a connecting structure (132) protruding from the first wall portion (131), and a connecting groove (133) formed in the connecting structure (132), the connecting structure (132) being disposed in one-to-one correspondence with the heat exchange tubes (2), the connecting groove (133) penetrating the inner plate (13);
the connecting structure (132) is positioned in the distribution groove (123), the outer wall of the connecting structure (132) and the wall of the distribution groove (124) are arranged in a sealing manner, the end part of the heat exchange tube (2) is arranged in the distribution groove (123) through the connecting groove (133), and the outer wall of the heat exchange tube (2) and the wall of the connecting groove (133) are arranged in a sealing manner.
6. A heat exchanger according to claim 5, wherein the groove wall of the connecting groove (133) is provided with a limiting portion (1331), the heat exchange tube (2) is provided with a positioning portion (21) which is matched with the limiting portion (1331) near the end, the distance from the limiting portion (1331) to the end surface of the connecting structure (132) is less than the distance from the positioning portion (21) to the end surface of the heat exchange tube (2), and the end surface of the heat exchange tube (2) is positioned outside the connecting groove (133).
7. A heat exchanger according to claims 1-6, wherein the main plate (11) further comprises a fifth wall portion (114), the fifth wall portion (114) being located on the opposite side of the fourth wall portion (111), the main plate (11) further comprising a protrusion (115) protruding from the fifth wall portion (114), the protrusion (115) having opposite ends, the first channel (112) being formed between the ends of the protrusion (115).
8. A heat exchanger according to claims 4 to 6, wherein the second wall portion (121) and the third wall portion (122) are provided with rivet connection holes (125), the fourth wall portion (111) and the first wall portion (131) are provided with rivet protrusions (1112, 1311), the rivet protrusions (1112, 1311) are arranged in the corresponding rivet connection holes (125), and the rivet protrusions (1112, 1311) are in interference fit with the hole walls of the rivet connection holes (125).
9. A heat exchanger according to claims 1 to 6, characterized by comprising a shell (3) and a pair of said collecting members (1), wherein said collecting members (1) are hermetically arranged at two ends of said shell (3), a heat exchange cavity is formed in said shell (3), said heat exchange tube (2) penetrates through said heat exchange cavity, and two ends of said heat exchange tube (2) are respectively connected to two said collecting members (1);
the current collecting piece (1) is provided with a connecting part (14) around the periphery of the current collecting piece, and the end face of the shell (3) and the inner wall close to the end face are fixedly connected to the connecting part (14).
10. A heat exchanger according to claim 9, wherein the area of the fourth wall portion (111) is larger than the area of the third wall portion (122), the connecting plate further comprises a sixth wall portion (126) perpendicular to the fourth wall portion (111), a connecting area (127) is formed between the periphery of the fourth wall portion (111) and the periphery of the sixth wall portion (126), the connecting portion (14) comprises the sixth wall portion (126) and the connecting area (127), the end face of the shell (3) is fixedly connected to the connecting area (127), and the inner wall of the shell (3) near the end face is fixedly connected to the sixth wall portion (126).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010066150.8A CN112432542A (en) | 2020-01-20 | 2020-01-20 | Heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010066150.8A CN112432542A (en) | 2020-01-20 | 2020-01-20 | Heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112432542A true CN112432542A (en) | 2021-03-02 |
Family
ID=74690674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010066150.8A Pending CN112432542A (en) | 2020-01-20 | 2020-01-20 | Heat exchanger |
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| Country | Link |
|---|---|
| CN (1) | CN112432542A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113251829A (en) * | 2021-04-30 | 2021-08-13 | 三花控股集团有限公司 | Heat exchange module |
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