阅读说明：本技术 换热器连接件及换热器 (Heat exchanger connecting piece and heat exchanger ) 是由 王冠军 魏文建 马文勇 于 2020-07-01 设计创作，主要内容包括：本发明涉及制冷技术领域,特别是涉及换热器连接件及换热器。一种换热器连接件,安装于换热器上,包括第一板及第二板,所述第一板上开设有多层通孔,所述第二板靠近所述第一板的侧面开设有多层第一凹槽,所述第一板贴合于所述第一凹槽的槽口以使第一板与所述第二板之间形成内腔,内腔内具有供介质流动的过渡区,所述第一凹槽内侧设有凸起,所述凸起至少部分位于所述过渡区内以减少所述过渡区的流通面积。本发明的优点在于：能够减少所述过渡区的流通面积,介质每层的其中一个所述通孔进入后,由于所述过渡区的流通面积减少,介质的流速增大,从而使介质更加均匀地从同层的另一个所述通孔流出。(The invention relates to the technical field of refrigeration, in particular to a heat exchanger connecting piece and a heat exchanger. The utility model provides a heat exchanger connecting piece, installs on the heat exchanger, includes first board and second board, the multilayer through-hole has been seted up on the first board, the second board is close to the first recess of multilayer has been seted up to the side of first board, the first board laminate in the notch of first recess so that first board with form the inner chamber between the second board, the inner chamber has the transition district that supplies the medium to flow, first recess inboard is equipped with the arch, protruding at least part is located in order to reduce in the transition district the flow area in transition district. The invention has the advantages that: the flow area of the transition region can be reduced, and after one through hole of each layer of the medium enters, the flow speed of the medium is increased due to the reduction of the flow area of the transition region, so that the medium flows out from the other through hole of the same layer more uniformly.)

1. The utility model provides a heat exchanger connecting piece, installs on the heat exchanger, includes first board (41) and second board (42), seted up multilayer through-hole (411) on first board (41), second board (42) are close to the side of first board (41) has seted up multilayer first recess (421), first board (41) laminate in the notch of first recess (421) so that form inner chamber (43) between first board (41) and second board (42), have in inner chamber (43) and supply transition district (44) that the medium flows, its characterized in that:

the inner side of the first groove (421) is provided with a bulge (422), and the bulge (422) is at least partially positioned in the transition region (44) to reduce the flow area of the transition region (44).

2. The heat exchanger coupling of claim 1, wherein: every layer through-hole (411) includes first through-hole (4111) and second through-hole (4112) at least, protruding (422) is in projection on first board (41) is located the axis of first through-hole (4111) with between the axis of second through-hole (4112).

3. The heat exchanger coupling of claim 2, wherein: the first through hole (4111), the second through hole (4112) and the first groove (421) on the same layer form channels, and the channels on each layer are not communicated with each other.

4. The heat exchanger coupling of claim 2, wherein: the projection of the protrusion (422) on the first plate (41) is centered on a central axis between the first through hole (4111) and the second through hole (4112).

5. The heat exchanger coupling of claim 1, wherein: the side surface and the end surface of the protrusion (422) are rounded.

6. The heat exchanger coupling of claim 1, wherein: the side surface of the second plate (42) far away from the first plate (41) is provided with a second groove (424) corresponding to the protrusion (422), and the protrusion (422) is formed by punching the first plate (41) at the position of the first groove (421).

7. The heat exchanger coupling of claim 6, wherein: the side surface, far away from the first plate (41), of the second plate (42) is provided with a convex hull (423) corresponding to the first groove (421), the convex hull (423) is arranged in a protruding mode on the surface, far away from the first plate (41), of the second plate (42) and is opposite to the second plate (42), and the second groove (424) is formed in the convex hull (423).

8. The heat exchanger coupling of claim 1, wherein: the side surface of the first plate (41) is provided with a plurality of layers of bumps (412), and the through holes (411) are opened on the corresponding bumps (412).

9. A heat exchanger, characterized by: the heat exchanger comprises a first collecting pipe (20), a second collecting pipe (30), a heat exchange pipe (10) and the heat exchanger connecting piece according to any one of claims 1 to 8, wherein one end of the heat exchange pipe (10) is connected with the first collecting pipe (20) and the second collecting pipe (30) respectively, and the other end of the heat exchange pipe is connected with the heat exchanger connecting piece.

10. The heat exchanger of claim 9, wherein: the heat exchange pipe (10) at least comprises a first heat exchange pipe group (11) and a second heat exchange pipe group (12), one end of the first heat exchange pipe group (11) is connected to the first collecting pipe (20), the other end of the first heat exchange pipe group is connected to the heat exchanger connecting piece, one end of the second heat exchange pipe group (12) is connected to the second collecting pipe (30), the other end of the second heat exchange pipe group is connected to the heat exchanger connecting piece, and the flow area of the heat exchange pipe (10) in the first heat exchange pipe group (11) is different from the flow area of the heat exchange pipe (10) in the second heat exchange pipe group (12).

Technical Field

The invention relates to the technical field of refrigeration, in particular to a heat exchanger connecting piece and a heat exchanger.

Background

In a refrigeration system, a heat exchanger is an important part of four refrigeration parts and plays a role in exchanging heat with the outside. In a dual-row heat exchanger, a heat exchanger connector is typically required to connect the two rows of heat exchange tubes.

In current heat exchanger connecting piece, after the medium got into the inner chamber, flow area grow, and the velocity of flow reduces, and then the medium can be preferred to get into the one side that is close to the import through-hole in the export through-hole, and the medium that causes in the heat exchange tube of being connected with the through-hole of export one side is many, and one side is few, leads to the unable make full use of heat exchange area of heat exchange tube.

Disclosure of Invention

In order to solve the problems, the invention provides a heat exchanger connecting piece, which adopts the following technical scheme:

the utility model provides a heat exchanger connecting piece, installs on the heat exchanger, includes first board and second board, the multilayer through-hole has been seted up on the first board, the second board is close to the first recess of multilayer has been seted up to the side of first board, the first board laminate in the notch of first recess so that first board with form the inner chamber between the second board, the inner chamber has the transition district that supplies the medium to flow, first recess inboard is equipped with the arch, protruding at least part is located in order to reduce in the transition district the flow area in transition district.

Due to the arrangement, the flow area of the transition region can be reduced, and after one through hole in each layer of the medium enters, the flow speed of the medium is increased due to the reduction of the flow area of the transition region, so that the medium can more uniformly flow out from the other through hole in the same layer.

In one embodiment of the present invention, each layer of the through holes at least includes a first through hole and a second through hole, and a projection of the protrusion on the first plate is located between a central axis of the first through hole and a central axis of the second through hole.

The arrangement is that the medium can smoothly flow in from the through hole and cannot be blocked by the protrusion, most of the medium is located near the first through hole after the medium enters the inner cavity, the medium flows towards the second through hole, the protrusion is arranged between the axis of the first through hole and the axis of the second through hole, the flow speed of the medium before the medium enters the second through hole can be increased, and the medium can enter the second through hole more uniformly.

In one embodiment of the invention, the first through hole, the second through hole and the first groove in the same layer form a channel, and the channels in each layer are not communicated with each other.

In one embodiment of the present invention, a center of a projection of the projection on the first plate is located on a central axis between the first through hole and the second through hole.

In one embodiment of the present invention, the side surface and the end surface of the protrusion are rounded.

This is arranged to reduce the pressure loss of the medium during said flow.

In one embodiment of the present invention, a second groove corresponding to the protrusion is formed on a side surface of the second plate away from the first plate, and the protrusion is formed by stamping the first plate at a position of the first groove.

So set up, simple process need not additionally to set up the arch, save material.

In one embodiment of the present invention, a convex hull corresponding to the first groove is disposed on a side surface of the second plate away from the first plate, the convex hull is convexly disposed relative to a surface of the second plate away from the first plate, and the second groove is opened on the convex hull.

So set up, the second lug can increase the degree of depth of first recess to make the medium have intensive mixing space in first recess.

In one embodiment of the present invention, a plurality of layers of bumps are disposed on a side surface of the first plate, and the through holes are opened on the corresponding bumps.

So set up to increase the thickness of first through-hole and the second through-hole, strengthen first through-hole and the joint strength of second through-hole and heat exchange tube.

The invention also provides the following technical scheme:

a heat exchanger comprises a first collecting pipe, a second collecting pipe, a heat exchange pipe and the heat exchanger connecting piece, wherein one end of the heat exchange pipe is connected with the first collecting pipe and the second collecting pipe respectively, and the other end of the heat exchange pipe is connected with the heat exchanger connecting piece.

So set up, can reduce the no wing district of heat exchanger increases heat transfer performance, just the heat exchanger connecting piece can realize that the medium turns back, strengthens the homogeneity with the air-out temperature of the air of heat exchange tube heat transfer.

In one embodiment of the present invention, the heat exchange tubes at least include a first heat exchange tube group and a second heat exchange tube group, one end of the first heat exchange tube group is connected to the first collecting pipe, the other end of the first heat exchange tube group is connected to the heat exchanger connecting piece, one end of the second heat exchange tube group is connected to the second collecting pipe, the other end of the second heat exchange tube group is connected to the heat exchanger connecting piece, and a flow area of the heat exchange tubes in the first heat exchange tube group is different from a flow area of the heat exchange tubes in the second heat exchange tube group.

The arrangement is adopted to increase the flow area of the medium and reduce the pressure loss of the medium in the flowing process.

Compared with the prior art, the heat exchanger connecting piece provided by the invention has the advantages that the bulges are arranged in the inner cavity and at least partially positioned in the transition region, so that the flow area of the transition region is reduced, the flow speed of a medium is increased, and the medium flows out more uniformly.

Drawings

FIG. 1 is a schematic diagram of a heat exchanger according to the present invention;

FIG. 2 is a top view of a heat exchanger provided by the present invention;

FIG. 3 is a partial cross-sectional view of a heat exchanger provided by the present invention;

FIG. 4 is a partial cross-sectional view of a heat exchanger connector and heat exchange tube provided in accordance with the present invention;

FIG. 5 is an elevation view of a heat exchanger coupling provided by the present invention;

FIG. 6 is a side view of a heat exchanger coupling provided by the present invention;

FIG. 7 is a schematic view of a portion of the construction of the first plate of the heat exchanger coupling provided by the present invention;

FIG. 8 is a schematic diagram of a process for fluid flow in a prior art heat exchanger coupling;

fig. 9 is a schematic view of the process of fluid flow in the heat exchanger coupling provided by the present invention.

The symbols in the drawings represent the following meanings:

100. a heat exchanger; 10. a heat exchange pipe; 11. a first heat exchange tube set; 12. a second heat exchange tube set; 13. a first heat transfer zone; 14. a second heat transfer zone; 20. a first header; 21. a first opening; 30. a second header; 31. a second opening; 40. a heat exchanger connector; 41. a first plate; 411. a through hole; 4111. a first through hole; 4112. a second through hole; 412. a bump; 42. a second plate; 421. a first groove; 422. a protrusion; 423. a convex hull; 424. a second groove; 43. an inner cavity; 44. a transition zone; 50. a fin; 60. and (7) a side plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 7, the present invention provides a heat exchanger 100, and the heat exchanger 100 is applied to an air conditioning system for exchanging heat with the outside. In this embodiment, the heat exchanger 100 is a double-row microchannel heat exchanger 100, and is used as an evaporator, and does not need to ensure that the superheat section and liquid separation cause interference design of partial materials, so that the heat exchange efficiency is high. Of course, in other embodiments, the heat exchanger 100 may also be a single row microchannel heat exchanger, or may also be a fin or other type of heat exchanger, depending on different needs, and the heat exchanger 100 may also be used as a condenser.

Referring to fig. 1 to 3, the heat exchanger 100 includes a first collecting pipe 20, a second collecting pipe 30, a heat exchanger connector 40 and a plurality of heat exchange tubes 10, wherein one end of each heat exchange tube 10 is connected to the first collecting pipe 20 and the second collecting pipe 30, and the other end is connected to the heat exchanger connector 40, and the first collecting pipe 20 and the second collecting pipe 30 are located on the same side.

Specifically, the plurality of heat exchange tubes 10 at least include a first heat exchange tube group 11 and a second heat exchange tube group 12, one end of each heat exchange tube 10 in the first heat exchange tube group 11 is connected to the first collecting pipe 20, the other end of each heat exchange tube 10 is connected to the heat exchanger connector 40, one end of each heat exchange tube 10 in the second heat exchange tube group 12 is connected to the second collecting pipe 30, and the other end of each heat exchange tube 10 is connected to the heat exchanger connector 40. The heat exchanger connector 40 is used for connecting the first heat exchange tube group 11 and the second heat exchange tube group 12, and for returning the medium.

The heat exchanger 100 further comprises a first heat exchange zone 13 and a second heat exchange zone 14, wherein the first heat exchange tube set 11 is located in the first heat exchange zone 13, and the second heat exchange tube set 12 is located in the second heat exchange zone 14.

Further, one end of the first header 20 is provided with a first opening 21, and one end of the second header 30 is provided with a second opening 31. In the present embodiment, the heat exchanger 100 is used as an evaporator, and the medium flows into the first header 20 from the first opening 21, sequentially flows through the heat exchange tubes 10 in the first heat exchange tube group 11 and the second heat exchange tube group 12, enters the second header 30, and flows out from the second opening 31. The first collecting pipe 20 and the second collecting pipe 30 are both provided with a plurality of layers of flat pipe grooves (not shown), the plurality of layers of flat pipe grooves are arranged along the length direction of the first collecting pipe 20 and/or the second collecting pipe 30, and one ends of the heat exchange pipes 10 in the first heat exchange pipe set 11 and the second heat exchange pipe set 12 are inserted into the flat pipe grooves and are fixed by welding. It should be noted that the media of the present invention refer to refrigerants such as R134a, R404A, R744, R717, and the like. In other embodiments, the heat exchanger 100 may be used as a condenser, with the first opening 21 being the outlet and the second opening 31 being the inlet.

The first heat exchange tube set 11 and the second heat exchange tube set 12 are connected through the heat exchanger connecting piece 40, so that a finless area between the first heat exchange tube set 11 and the second heat exchange tube set 12 can be reduced. It can be understood that in the existing microchannel heat exchanger, when the first collecting pipe and the second collecting pipe are required to be arranged at the same side, the heat exchange pipe is bent, the bending radius is large, the heat exchange pipe at the bending part cannot be provided with fins for heat exchange, and the heat exchange performance of the heat exchanger is reduced; the heat exchanger connecting piece 40 can realize the return of the medium, and outside air exchanges heat firstly in the first heat exchange area 13 and then in the second heat exchange area 14, so that the outlet air temperature of the leeward side is uniform. It should be noted that the finless zone of the present invention is a region where the below-described fins 50 cannot be mounted, and the leeward side is the air-out side after the air has exchanged heat with the medium in the heat exchanger 100.

Preferably, the flow areas of the heat exchange tubes 10 in the first heat exchange tube group 11 and the heat exchange tubes 10 in the second heat exchange tube group 12 are different, in this embodiment, the flow direction of the medium is from the first heat exchange tube group 11 to the second heat exchange tube group 12, and then the flow area of the heat exchange tubes 10 in the first heat exchange tube group 11 is smaller than the flow area of the heat exchange tubes 10 in the second heat exchange tube group 12, so that the flow area of the medium is increased during the flow process, the pressure loss during the flow process is reduced, and the heat exchange performance of the heat exchanger 100 is enhanced.

Referring to fig. 4 to 7, the heat exchanger connector 40 includes a first plate 41 and a second plate 42, the first plate 41 is provided with a plurality of layers of through holes 411, the plurality of layers of through holes 411 are arranged along a length direction of the first plate 41, a side surface of the second plate 42 close to the first plate 41 is provided with a plurality of layers of first grooves 421, and the side surface of the first plate 41 is attached to a notch of the first grooves 421 so as to form an inner cavity 43 between the first plate 41 and the second plate 42. The first plate 41 and the second plate 42 are fixed to each other by welding. The medium flows within the inner cavity 43 to form a transition zone 44. The transition region 44 is a distribution region of the medium in the process of entering the inner cavity from the first through hole 4111 to the second through hole 4112 and flowing out.

Specifically, each layer of through holes 411 at least includes a first through hole 4111 and a second through hole 4112, the first through hole 4111 is connected to a heat exchange tube 10 of the first heat exchange tube set 11, and the second through hole 4112 is connected to a heat exchange tube 10 of the second heat exchange tube set 12.

Flow channels are formed among the first through hole 4111, the second through hole 4112 and the first groove 421 of each layer, and the flow channels of each layer are connected in parallel and are not communicated with each other. It can be understood that the medium is uniformly distributed before entering the first heat exchange tube set 11, and the flow channels of each layer are not communicated with each other, so that secondary liquid separation of the medium in the heat exchanger connecting element 40 can be avoided, and the partially gasified medium can flow to the flow channel of the upper layer, so that the medium is not uniform.

In this embodiment, the flow area of the first through hole 4111 is smaller than that of the second through hole 4112, so as to match with the heat exchange tubes 10 of the first heat exchange tube group 11 and the heat exchange tubes 10 of the second heat exchange tube group 12. In other embodiments, the flow area of the first through hole 4111 and the flow area of the second through hole 4112 may be the same according to different designs.

Referring to fig. 8, in the conventional heat exchanger connecting piece, a medium enters an inner cavity from a first through hole, the flow area of a transition region 44 'is large, and the flow rate of the medium entering the transition region 44' is reduced, so that the medium preferentially enters one side of a second through hole close to the first through hole, the medium is unevenly distributed, and the heat exchange area of a heat exchange tube is wasted. In fig. 8, the left side of the dotted line is a transition region 44', and the transition region 44' is a distribution region of the medium in the process of entering the inner cavity from the first through hole to the second through hole and flowing out from the first through hole.

Referring to fig. 5, 6 and 9, the inner side of the first recess 421 is provided with a protrusion 422, and the protrusion 422 is at least partially located in the transition region 44 to reduce the flow area of the transition region 44. It can be understood that after entering the first through hole 4111, the medium flows into the transition region 44, and the protrusion 422 disposed in the inner cavity 43 can reduce the flow area of the transition region 44, so as to increase the flow rate of the medium, that is, increase the flow rate of the medium before entering the second through hole 4112, so that the medium uniformly flows into the second through hole 4112, and further the medium can be uniformly distributed in the heat exchange tubes 10 in the second heat exchange tube group 12, thereby fully utilizing the heat exchange area of the heat exchange tubes 10 and enhancing the heat exchange performance; if the flow velocity of the medium before entering the second through hole 4112 is low, the medium preferentially enters one side of the second through hole 4112 close to the first through hole 4111, the medium in one side of the second through hole 4112 close to the first through hole 4111 is more, the medium in one side far away from the first through hole 4111 is less, and the heat exchange area of the heat exchange tube 10 cannot be fully utilized. Below the dashed line in fig. 9 is a transition zone 44.

Preferably, the projection of the protrusion 422 on the first plate 41 is located between the central axis of the first through hole 4111 and the central axis of the second through hole 4112. With this arrangement, the medium can smoothly enter the inner cavity 43 from the first through hole 4111 without being blocked by the protrusion 422, and the flow rate is increased before entering the second through hole 4112.

In the present embodiment, the center of the projection of the protrusion 422 on the first plate 41 is located on the central axis between the first through hole 4111 and the second through hole 4112. In other embodiments, the protrusion 422 may be disposed near the second through hole 4112 or at other positions according to different width designs of the heat exchanger connector 40 and different widths of the protrusion 422.

Preferably, the protrusions 422 are rounded between the side and end surfaces to reduce pressure loss of the media during flow.

The side of keeping away from first board 41 on the second board 42 is equipped with the convex closure 423 that corresponds with first recess 421, and the surface protrusion setting that first board 41 was kept away from to the second board 42 of convex closure 423 relatively, and the inboard of convex closure 423 is located to first recess 421, so set up, can make the medium flow out in second through-hole 4112 again after first recess 421 can the intensive mixing, and the setting of convex closure 423 is the space that the mixture of medium provided.

The side surface of the convex hull 423 away from the first plate 41 is provided with a second groove 424, the second groove 424 corresponds to the protrusion 422, and the protrusion 422 is formed by stamping the convex hull 423 at the position of the second groove 424, so that the process is simple, the protrusion 422 does not need to be additionally arranged in the first groove 421, the process complexity is reduced, and the material is saved.

Referring to fig. 7, a bump 412 is disposed on a side surface of the first plate 41, and a first through hole 4111 and a second through hole 4112 are opened on the bump 412. It can be understood that the protrusion 412 can increase the thickness of the first through hole 4111 and the second through hole 4112, and increase the connection strength between the first through hole 4111 and the second through hole 4112 and the first heat exchange tube set 11 and the second heat exchange tube set 12.

With continued reference to fig. 1, the heat exchanger 100 further includes fins 50, the heat exchange tubes 10 and the fins 50 in the first heat exchange tube group 11 are arranged in a stacked manner along the length direction of the first collecting pipe 20, and the heat exchange tubes 10 and the fins 50 in the second heat exchange tube group 12 are arranged in a stacked manner along the length direction of the second collecting pipe 30. One end of each heat exchange tube 10 in the first heat exchange tube group 11 is arranged in a flat tube groove of the first collecting tube 20 in a penetrating manner, one end of each heat exchange tube 10 in the second heat exchange tube group 12 is arranged in a flat tube groove of the second collecting tube 30 in a penetrating manner, the fins 50 in the first heat exchange region 13 are arranged among the heat exchange tubes 10 in the first heat exchange tube group 11, and the fins 50 in the second heat exchange region 14 are arranged among the heat exchange tubes 10 in the second heat exchange tube group 12.

Further, the heat exchanger 100 further includes an edge plate 60, and the edge plate 60 is disposed on the side surfaces of the uppermost and lowermost fins 50 to protect the fins 50.

In the working process, the medium is uniformly distributed to each heat exchange tube 10 of the first heat exchange tube group 11 from the first collecting pipe 20, exchanges heat with the outside in the first heat exchange zone 13, enters the inner cavity 43 from the first through hole 4111, flows towards the second through hole 4112 in the inner cavity 43, and accelerates the flow rate under the action of the protrusion 422 in the flowing process, so that the medium uniformly flows into the second through hole 4112. The medium enters the heat exchange tubes 10 in the second heat exchange tube group 12 from the second through holes 4112, exchanges heat in the second heat exchange zone 14, and flows out from the second collecting pipe 30.

The heat exchanger connecting piece 40 of the present invention can make the medium flow out uniformly, make full use of the heat exchange area of the heat exchange tube 10, and enhance the heat exchange performance.

The heat exchanger 100 of the present invention is connected to the first heat exchange tube set 11 and the second heat exchange tube set 12 by the heat exchanger connecting member 40, so as to reduce the finless area, increase the effective heat exchange area, achieve uniform outlet air temperature, and enhance the comfort of users.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.