CN211823982U - Heat exchanger and connecting piece thereof - Google Patents

Abstract

The utility model relates to a heat exchanger and connecting piece thereof, connecting piece are used for communicateing first-class siphunculus and second siphunculus. The connecting piece comprises a first plate and a second plate. The first plate has a first collecting surface. The second plate is arranged on the first flow collecting face in a stacked mode and is in close fit with the first flow collecting face, the second plate is provided with a second flow collecting face facing the first flow collecting face, the second flow collecting face is recessed along the direction back to the first flow collecting face to form a trapezoidal groove, and the groove wall of the trapezoidal groove and the first flow collecting face jointly enclose a flow collecting space communicated with the first flow pipe and the second flow pipe. The utility model provides a heat exchanger and connecting piece thereof have great mass flow space.

Description

Heat exchanger and connecting piece thereof

Technical Field

The utility model relates to a heat transfer technical field especially relates to a heat exchanger and connecting piece thereof.

Background

The heat exchanger generally includes a first flow pipe, a second flow pipe, and a connecting member for connecting the first flow pipe and the second flow pipe. And a collecting space is formed in the connecting piece, and the refrigerant flows out of the second flow pipe from the first flow pipe through the collecting space and exchanges heat with the external environment in the flowing process. Because the collecting space in the prior art is small, the refrigerant cannot be uniformly distributed, and the connecting piece has large pressure drop.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a heat exchanger and a connector thereof capable of enlarging a collecting space, aiming at the problem that the collecting space of the conventional connector is small.

A connecting piece for communicating a first flow tube and a second flow tube, the connecting piece comprising:

a first plate having a first collecting surface; and

the second plate is arranged on the first flow collecting face in a stacked mode and is in close fit with the first flow collecting face, the second plate is provided with a second flow collecting face facing the first flow collecting face, the second flow collecting face is recessed along the direction back to the first flow collecting face to form a trapezoidal groove, and the groove wall of the trapezoidal groove and the first flow collecting face jointly enclose a flow collecting space communicated with the first flow pipe and the second flow pipe.

In one embodiment, a first assembly hole for clamping the first flow pipe and a second assembly hole for clamping the second flow pipe are formed in the first plate, and the first assembly hole and the second assembly hole are both communicated with the flow collecting space.

In one embodiment, the edge of the first assembly hole is bent to form a first flange which surrounds along the circumferential direction of the first assembly hole and is in tight fit with the first flow pipe, and the edge of the second assembly hole is bent to form a second flange which surrounds along the circumferential direction of the second assembly hole and is in tight fit with the second flow pipe.

In one embodiment, the first flange and the second flange enclose a flat tube structure.

In one embodiment, the first flange and the second flange both extend in a direction away from the second collecting surface.

In one embodiment, the first collecting surface is recessed along a direction away from the second collecting surface to form a collecting groove, and the first assembly hole, the second assembly hole, the first flange and the second flange are formed in a groove wall of the collecting groove.

In one embodiment, the flow collector further comprises an intermediate plate, the intermediate plate is clamped between the first flow collecting surface and the second flow collecting surface, and a flow collecting hole is formed in the position, opposite to the trapezoidal groove, of the intermediate plate.

In one embodiment, the notch of the trapezoid groove is positioned in the projection range of the collecting hole on the second collecting surface.

A heat exchanger, comprising:

the connecting piece is as above; and

the first flow pipe and the second flow pipe are arranged on the first plate and are communicated with the flow collecting space.

In one embodiment, the first plate and the second plate are both strip-shaped, the plurality of flow collecting spaces are arranged at intervals along the length direction of the first plate and/or the second plate, and the plurality of first flow pipes and the plurality of second flow pipes are respectively in one-to-one correspondence with the plurality of flow collecting spaces

In the heat exchanger and the connecting piece thereof, the groove wall of the trapezoidal groove and the first flow collecting surface are jointly surrounded to form a flow collecting space, and the coolant flowing into the first flow pipe flows out of the second flow pipe through the flow collecting space. The second current collecting surface is formed into a trapezoidal groove in a concave mode, the trapezoidal groove is provided with a larger internal accommodating space, and the trapezoidal groove is matched with the first current collecting surface to effectively expand the area of the current collecting space. Therefore, when the refrigerant flows through the collecting space, the gaseous and liquid refrigerants can be fully mixed in the collecting space and uniformly distributed to the second flow pipe. Meanwhile, the trapezoidal groove has a larger surface area, and under the condition that the impact force of the refrigerant is certain, the pressure drop acting on the groove wall of the trapezoidal groove is reduced, so that the service life of the connecting piece is prolonged.

Drawings

Fig. 1 is a schematic view of the overall structure of the heat exchanger of the present invention;

FIG. 2 is an enlarged schematic view of a portion of structure A of FIG. 1;

fig. 3 is a sectional view in one direction of the heat exchanger shown in fig. 1 after the first communication pipe is assembled with the connection member;

FIG. 4 is a cross-sectional view of the first communication pipe shown in FIG. 3 assembled with the connector in another direction;

fig. 5 is an exploded view of a connector of the present invention in a first embodiment;

FIG. 6 is a front view of the connector shown in FIG. 5;

FIG. 7 is a cross-sectional view taken along A-A of the connector shown in FIG. 5;

FIG. 8 is a cross-sectional view of the connector shown in FIG. 5 taken along the direction B-B;

fig. 9 is a front view of a connector of the present invention in a second embodiment;

FIG. 10 is a cross-sectional view of the connector shown in FIG. 9 taken along the direction C-C;

FIG. 11 is a cross-sectional view of the connector shown in FIG. 9 taken along the direction D-D;

fig. 12 is an exploded view of a connector of the present invention in a third embodiment;

FIG. 13 is a front view of the connector shown in FIG. 12;

FIG. 14 is a cross-sectional view taken along G-G of the connector shown in FIG. 12;

FIG. 15 is a cross-sectional view taken along H-H of the connector shown in FIG. 12;

fig. 16 is an exploded view of a connector of the present invention in a fourth embodiment;

FIG. 17 is an elevation view of the connector shown in FIG. 16;

FIG. 18 is a cross-sectional view of the connector shown in FIG. 16 taken along E-E;

fig. 19 is a cross-sectional view along F-F of the connector shown in fig. 16.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

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 "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, the present invention provides a heat exchanger 10, wherein a refrigerant flowing through the heat exchanger 10 can exchange heat with an external environment through a surface of the heat exchanger 10, so as to achieve effective heat exchange. Specifically, the heat exchanger 10 may be used as an evaporator, a condenser, or other type of heat exchange device in an air conditioner.

Referring to fig. 2, 3 and 4, the heat exchanger 10 includes an inlet pipe 110, a first flow pipe 120, a connecting member 130, a second flow pipe 140 and an outlet pipe 150. The inlet pipe 110 serves to introduce the refrigerant into the heat exchanger 10. The inlet pipe 110 is in communication with the first flow tube 120, the connector 130, the second flow tube 140, and the outlet pipe 150 in this order to form a flow passage of the refrigerant. The refrigerant may exchange heat with the external environment through the surfaces of the inlet pipe 110, the first flow pipe 120, the connector 130, the second flow pipe 140, and the outlet pipe 150 while flowing through the flow channels.

Specifically, the inlet pipe 110, the first flow pipe 120, the connecting member 130, the second flow pipe 140, and the outlet pipe 150 are all elongated. The inlet pipe 110 and the outlet pipe 150 are both one, and the single inlet pipe 110 and the single outlet pipe 150 are arranged in parallel and at intervals. The first and second flow tubes 120 and 140 are plural. The plurality of first flow tubes 120 are arranged in parallel and at intervals along the length direction of the inlet pipe 110. Each of the first through-flow pipes 120 communicates with the inlet pipe 110. The plurality of second circulation pipes 140 are arranged in parallel and at intervals along the length direction of the outlet pipe 150, and correspond to the plurality of first circulation pipes 120 one to one. Each of the second flow tubes 140 communicates with the outlet pipe 150. The connector 130 is parallel to the inlet pipe 110 and the outlet pipe 150. The connection member 130 is disposed on the same side of the first and second communication pipes away from the inlet pipe 110 and the outlet pipe 150, and is respectively communicated with the first and second communication pipes. The refrigerant flowing from the inlet pipe 110 is branched at the connection of the plurality of first through-flow tubes 120 with the inlet pipe 110 and flows from a portion of the first through-flow tubes 120 or each of the first through-flow tubes 120 to the connection member 130, respectively. And then flows out of the second communication pipe and the outlet pipe 150 through the connection member 130. Generally, the refrigerant flowing through the first flow tube 120 can flow out only from the second flow tube 140 corresponding to the first flow tube 120 after passing through the connection 130.

By providing the plurality of first flow tubes 120 and the plurality of second flow tubes 140, the number of flow channels in the whole heat exchanger 10 can be increased, so as to improve the heat exchange efficiency of the heat exchanger 10. Furthermore, the plurality of first flow tubes 120 and the plurality of second flow tubes 140 increase the surface area of the heat exchanger 10, so as to increase the heat exchange speed between the heat exchanger 10 and the external environment.

In addition, in order to further increase the heat dissipation speed, the first and second flow-through tubes 120 and 140 may be flat tubes. Therefore, the surface areas of the first and second flow tubes 120 and 140 are increased, and the heat exchange rate with the outside is effectively increased.

In the heat exchanger 10, a plurality of fins 160 are also included. Each fin 160 is wavy, and one fin 160 is arranged between any two adjacent first flow tubes 120 and any two adjacent second flow tubes 140. Each fin 160 extends in the extending direction of the first flow tube 120 and/or the second flow tube 140. The provision of the fins 160 may increase the surface area of the heat exchanger 10 to facilitate rapid heat dissipation.

Referring to fig. 5, the connecting member 130 is used to connect the first flow tube 120 and the second flow tube 140. The connecting member 130 includes a first plate 131 and a second plate 133.

Referring to fig. 6, 7 and 8, the first plate 131 has a first collecting surface 1310. The second plate 133 is stacked on the first collecting surface 1310 and closely attached to the first collecting surface 1310, so as to prevent the refrigerant from leaking to the external environment from the gap between the first plate 131 and the second plate 133. The second plate member 133 has a second collecting surface 1330 facing the first collecting surface 1310, and the second collecting surface 1330 is recessed in a direction away from the first collecting surface 1310 to form a trapezoidal groove 1332. The groove wall of the trapezoid groove 1332 and the first collecting surface 1310 jointly enclose a collecting space 1334 communicating the first flow pipe 120 and the second flow pipe 140.

Specifically, the first plate 131 and the second plate 133 are both elongated and extend along the length of the inlet pipe 110 and/or the outlet pipe 150. The second plate 133 is disposed on a side of the first plate 131 facing away from the first flow tube 120 and the second flow tube 140. The collecting space 1334 is plural and provided at intervals in a length direction of the first plate member 131 and/or the second plate member 133. The first and second flow tubes 120 and 140 are installed on the first plate 131 and communicate with the collecting space 1334. The first flow tubes 120 and the second flow tubes 140 correspond to the collecting spaces 1334 one by one. That is, the one first flow tube 120 and the one second flow tube 140 corresponding to each other can communicate only through the corresponding collecting space 1334.

In operation of the heat exchanger 10, refrigerant flows into the inlet pipe 110 and flows out of the outlet pipe 150 through the corresponding first flow tube 120, the collecting space 1334, and the second flow tube 140 in sequence. There are two states in the process of heat exchange of the refrigerant in the heat exchanger 10: gaseous and liquid. If the gaseous and liquid refrigerants are not sufficiently mixed in the collecting space 1334, the refrigerants in the two states cannot be uniformly distributed to the second flow tube 140, and therefore, the heat exchanger 10 may have a poor heat exchange effect. Also, when the refrigerant flows into the corresponding collecting space 1334 from the inlet pipe 110, the refrigerant may have a large impact on the walls of the trapezoidal grooves 1332. Thus, the second plate member 133 is subjected to an increased pressure drop and a reduced service life.

In the present embodiment, since the second collecting surface 1330 is recessed to form the trapezoidal groove 1332, the trapezoidal groove 1332 has a large inner accommodating space, and the groove wall of the trapezoidal groove 1332 and the first collecting surface 1310 cooperate to effectively expand the area of the collecting space 1334. The connection 130 thus has a large collecting space 1334 available for the coolant to flow through. As the refrigerant flows through the collecting space 1334, the gaseous and liquid refrigerants may be sufficiently mixed in the collecting space 1334, so that the gaseous and liquid refrigerants may be uniformly distributed to the second flow tube 140. Meanwhile, the trapezoidal groove 1332 has a larger surface area, and the impact force of the refrigerant is distributed to the walls of the trapezoidal groove 1332 with a smaller pressure drop under a certain impact force, so as to prolong the service life of the second plate 133.

The first plate member 131 is formed with first and second fitting holes 1311 and 1313 each communicating with the collecting space 1334. The first fitting hole 1311 is used to catch the first flow tube 120. The second fitting hole 1313 is used to catch the second flow tube 140.

Specifically, the first flow-through pipe 120 is inserted into and clamped in the first assembling hole 1311 to fix the first flow-through pipe 120. The second flow tube 140 is inserted through and clamped in the second assembling hole 1313, so that the second flow tube 140 can be fixed. The first flow pipe 120 and the second flow pipe 140 can be simply and easily installed in a clamping manner, so that the number of parts for installing the first flow pipe 120 and the second flow pipe 140 is reduced.

In addition, the first and second flow tubes 120 and 140 are disposed on the first plate 131, and the first and second plates 131 and 133 are disposed on the same side of the first and second flow tubes 120 and 140, so that the total occupied space of the plurality of first and second flow tubes 120 and 140 can be reduced, and the entire heat exchanger 10 can be more compact, compared to the case where the first and second flow tubes 120 and 140 are disposed on the first and second plates 131 and 133, so as to achieve the miniaturization of the heat exchanger 10.

It should be noted that, since the collecting space 1334, the first flow pipe 120 and the second flow pipe 140 are provided in plural, and each collecting space 1334 corresponds to one first flow pipe 120 and one second flow pipe 140, a plurality of first assembling holes 1311 and second assembling holes 1313 also need to be opened on the first plate 131, and only a single first assembling hole 1311 and a single second assembling hole 1313 are provided at a position where the second plate 133 corresponds to each collecting space 1334. To prevent the coolant from leaking into the external environment, the first flow tube 120 needs to be tightly fitted with the hole wall of the first fitting hole 1311 when inserted into the first fitting hole 1311, and the second flow tube 140 needs to be tightly fitted with the hole wall of the second fitting hole 1313 when inserted into the second fitting hole 1313. Generally, the inlet pipe 110, the first flow pipe 120, the second flow pipe 140, the first plate 131, the second plate 133 and the outlet pipe 150 are made of metal, so that after the first flow pipe 120 is inserted into the first assembling hole 1311 and the second flow pipe 140 is inserted into the second assembling hole 1313, the hole walls of the first flow pipe 120 and the first assembling hole 1311 and the hole walls of the second flow pipe 140 and the second assembling hole 1313 can be tightly combined by welding or gluing.

Further, the edge of the first fitting hole 1311 is bent to form a first flange 1312, and the edge of the second fitting hole 1313 is bent to form a second flange 1314. The first flange 1312 surrounds and is closely fitted to the first flow tube 120 in the circumferential direction of the first fitting hole 1311, and the second flange 1314 surrounds and is closely fitted to the second flow tube 140 in the circumferential direction of the second fitting hole 1313, to prevent the refrigerant from leaking to the external environment.

Specifically, the first flange 1312 surrounds the first assembly hole 1311 in the circumferential direction to form a closed ring structure, and the second flange 1314 also surrounds the second assembly hole 1313 in the circumferential direction to form a closed ring structure. The first and second flanges 1312, 1314 may extend in a direction toward the second manifold face 1330, may both extend in a direction away from the second manifold face 1330, or may one extend in a direction toward the second manifold face 1330 and the other extend in a direction away from the second manifold face 1330.

If the first and second flanges 1312 and 1314 extend in a direction toward the second collecting surface 1330, the inner surfaces of the first and second flanges 1312 and 1314 are formed by the surface of the first plate 131 facing away from the second collecting surface 1330, and the outer surfaces of the first and second flanges 1312 and 1314 are formed by the first collecting surface 1310 of the first plate 131. At this time, the outer surfaces of the first and second flanges 1312 and 1314, and the portion of the first collecting surface 1310 connecting the outer surfaces of the first and second flanges 1312 and 1314, and the groove wall of the trapezoidal groove 1332 together enclose a collecting space 1334.

If the first and second flanges 1312 and 1314 extend in a direction away from the second collecting surface 1330, the inner surfaces of the first and second flanges 1312 and 1314 are formed by the first collecting surface 1310, and the outer surfaces of the first and second flanges 1312 and 1314 are formed by the surface of the first plate 131 facing away from the second collecting surface 1330. At this time, the inner surfaces of the first and second flanges 1312 and 1314, and the portion of the first collecting surface 1310 connecting the inner surfaces of the first and second flanges 1312 and 1314, and the wall of the trapezoidal groove 1332 together enclose a collecting space 1334.

If one of the first flange 1312 and the second flange 1314 extends along the direction of the second collecting surface 1330, and the other extends along the direction away from the second collecting surface 1330, the first flange 1312 extends along the direction of the second collecting surface 1330, and the second flange 1314 extends along the direction away from the second collecting surface 1330 will be described as an example. The outer surface of the first flange 1312 is formed by the first current collecting surface 1310 of the first plate 131, the inner surface of the second flange 1314 is formed by the first current collecting surface 1310, and the outer surface forming the first flange 1312 and the inner surface of the second flange 1314 as well as the groove wall connecting the outer surface of the first flange 1312 and the inner surface of the second flange 1314 enclose a current collecting space 1334 together with the groove wall of the trapezoidal groove 1332.

The first communicating tube 120 is inserted through the first flange 1312 and tightly fit with the inner surface of the first flange 1312, and the second communicating tube 140 is inserted through the second flange 1314 and tightly fit with the inner surface of the second flange 1314. By providing the first and second flanges 1312 and 1314, the contact area between the first and second flow tubes 120 and 140 and the first plate 131 can be increased, so that the first and second flow tubes 120 and 140 can be more firmly mounted.

Specifically, the first flange 1312 and the second flange 1314 enclose to form a flat tubular structure. Since the first and second flow tubes 120 and 140 are flat tubes, the first and second flanges 1312 and 1314 of the flat tube structure can respectively fit with the outer surfaces of the first and second flow tubes 120 and 140, so as to respectively clamp the first and second flow tubes 120 and 140.

Referring to fig. 9, 10 and 11, further, in some embodiments, the first flange 1312 and the second flange 1314 both extend in a direction away from the first collecting surface 1310.

If at least one of the first and second flanges 1312, 1314 extends in a direction toward the second collecting face 1330, the first and/or second flanges 1312, 1314 extending in the direction of the second collecting face 1330 will occupy part of the interior receiving space of the trapezoidal groove 1332, resulting in a reduction of the collecting space 1334. By arranging the first turned-over edge 1312 and the second turned-over edge 1314 to extend along the direction back to the first collecting surface 1310, the first turned-over edge 1312 and the second turned-over edge 1314 do not occupy the original collecting space 1334, and the collecting space 1334 can be expanded outwards, so that the collecting space 1334 is enlarged, and gaseous and liquid refrigerants can be fully mixed in the collecting space 1334.

Referring to fig. 12, 13, 14 and 15, in some embodiments, the first current collecting surface 1310 is recessed in a direction away from the second current collecting surface 1330 to form a current collecting slot 1315, and the first assembling hole 1311, the second assembling hole 1313, the first flange 1312 and the second flange 1314 are formed on a slot wall of the current collecting slot 1315.

Specifically, the groove wall of the collecting groove 1315 is formed by the first collecting face 1310. The first fitting hole 1311, the second fitting hole 1313, the first flange 1312, and the second flange 1314 may be formed at the bottom of the collecting tank 1315 or at the tank sidewall of the collecting tank 1315.

If the first turned-over edge 1312 and the second turned-over edge 1314 both extend in the direction toward the second current collecting surface 1330, the outer surfaces of the first turned-over edge 1312 and the second turned-over edge 1314 are formed, the groove wall of the current collecting groove 1315 connecting the outer surfaces of the first turned-over edge 1312 and the second turned-over edge 1314 and the groove wall of the remaining current collecting groove 1315 and the groove wall of the trapezoidal groove 1332 jointly enclose a current collecting space 1334.

If the first turned-over edge 1312 and the second turned-over edge 1314 both extend in the direction away from the second current collecting surface 1330, the current collecting space 1334 is formed by the groove walls of the current collecting grooves 1315 connecting the inner surfaces of the first turned-over edge 1312 and the second turned-over edge 1314 and the groove walls of the remaining current collecting grooves 1315 and the trapezoidal groove 1332 which are enclosed together.

If one of the first flange 1312 and the second flange 1314 extends along the direction of the second collecting surface 1330, and the other extends along the direction away from the second collecting surface 1330, the first flange 1312 extends along the direction towards the second collecting surface 1330, and the second flange 1314 extends along the direction away from the second collecting surface 1330 will be described as an example. The outer surface of the first flange 1312, the inner surface of the second flange 1314, the groove wall of the collecting groove 1315 connecting the outer surface of the first flange 1312 and the inner surface of the second flange 1314 and the remaining groove wall of the collecting groove 1315 and the groove wall of the trapezoidal groove 1332 are jointly enclosed to form a collecting space 1334.

By providing the collecting groove 1315, the collecting space 1334 can be further expanded, so that the gaseous and liquid refrigerants can be further mixed in the collecting space 1334.

Specifically, the manifold 1315 may be a trapezoidal slot 1332, an arc slot, or other shaped slot configuration. Preferably a trapezoidal slot 1332, the trapezoidal slot 1332 having an enlarged internal receiving space to facilitate expansion of the plenum space 1334.

Referring to fig. 16, 17, 18 and 19, in some embodiments, the connector 130 further includes an intermediate plate 135, the intermediate plate 135 is clamped between the first collecting surface 1310 and the second collecting surface 1330, and a collecting hole 1350 is formed at a position of the intermediate plate 135 opposite to the trapezoidal groove 1332.

The middle plate 135 is stacked with the first and second plate members 131 and 133, the middle plate 135 has a first surface 1352 facing the first collecting surface 1310 and a second surface 1354 facing the second collecting surface 1330, and the collecting holes 1350 penetrate the first and second surfaces 1352 and 1354. The first and second surfaces 1352 and 1354 are respectively attached to the first and second collecting surfaces 1310 and 1330 to prevent the refrigerant from leaking to the external environment through gaps between the first and second collecting surfaces 1310 and 1330 and the middle plate 135.

In this embodiment, the first collecting surface 1310 and the first surface 1352, the hole wall of the collecting hole 1350, the second surface 1354 and the groove wall of the trapezoid groove 1332 together form a collecting space 1334, or the first collecting surface 1310 and the first surface 1352, the hole wall of the collecting hole 1350 and the groove wall of the trapezoid groove 1332 together form a collecting space 1334, or the first collecting surface 1310 and the hole wall of the collecting hole 1350, the second surface 1354 and the groove wall of the trapezoid groove 1332 together form a collecting space 1334, or the first collecting surface 1310 and the hole wall of the collecting hole 1350 and the groove wall of the trapezoid groove 1332 together form a collecting space 1334.

By providing the middle plate 135, the middle plate 135 is spaced apart from the first and second plate members 131 and 133, such that the first and second collecting surfaces 1310 and 1330 are spaced apart from each other. Furthermore, the first collecting surface 1310, the middle plate 135 and the walls of the trapezoidal groove 1332 can form a larger collecting space 1334, so that the gaseous and liquid refrigerants have better mixing effect in the collecting space 1334.

It should be noted that, when the connecting member 130 includes the middle plate 135, the first plate 131 and the second plate 133 may be disposed in any one of the above embodiments.

Optionally, for example, the connecting member 130 includes a first plate 131, a second plate 133 and an intermediate plate 135, the first plate 131 is formed with a first assembling hole 1311, a second assembling hole 1313, a first flange 1312 and a second flange 1314, and the first flange 1312 and the second flange 1314 both extend in a direction toward the second collecting surface 1330.

Alternatively, for example, the connecting member 130 includes a first plate member 131, a second plate member 133 and an intermediate plate 135, the first plate member 131 is formed with a collecting slot 1315, the first assembly hole 1311, the second assembly hole 1313, the first flange 1312 and the second flange 1314 are formed on a slot wall of the collecting slot 1315, and the first flange 1312 and the second flange 1314 both extend in a direction toward the second collecting surface 1330.

Specifically, the notch of the trapezoidal groove 1332 is located within a projection range of the manifold hole 1350 on the second manifold surface 1330.

That is, the diameter of the collecting hole 1350 is larger than the opening diameter of the trapezoidal groove 1332. Therefore, when the middle plate 135 is clamped between the first collecting surface 1310 and the second collecting surface 1330, the first surface 1352 and the second surface 1354 of the middle plate 135 are offset from the notches of the trapezoidal groove 1332 and do not shield the notches of the trapezoidal groove 1332, so that the collecting space 1334 is formed by the groove walls of the trapezoidal groove 1332, the hole walls of the collecting holes 1350 and the first collecting surface 1310. In this embodiment, the intermediate plate 135 does not occupy the size of the collecting space 1334, and the collecting space 1334 may be enlarged such that the connection member 130 has a larger collecting space 1334.

In the heat exchanger 10 and the connector 130 thereof, the groove wall of the trapezoidal groove 1332 and the first collecting surface 1310 are arranged together to form a collecting space 1334, and the coolant flowing into the first flow tube 120 flows out from the second flow tube 140 through the collecting space 1334. Since the second current collecting surface 1330 is concavely formed as the trapezoidal groove 1332, the trapezoidal groove 1332 has a large inner receiving space, and the region of the current collecting space 1334 can be effectively expanded by cooperation with the first current collecting surface 1310. Therefore, when the refrigerant flows through the collecting space 1334, the refrigerant in the gas state and the refrigerant in the liquid state may be sufficiently mixed in the collecting space 1334 and uniformly distributed to the second flow tube 140. At the same time, the trapezoidal groove 1332 has a large surface area, and the pressure drop acting on the groove wall of the trapezoidal groove 1332 is reduced under a certain impact force of the refrigerant, so as to prolong the service life of the connecting member 130.

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 represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A connecting piece for communicating a first flow tube and a second flow tube, the connecting piece comprising:

a first plate having a first collecting surface; and

the second plate is arranged on the first flow collecting face in a stacked mode and is in close fit with the first flow collecting face, the second plate is provided with a second flow collecting face facing the first flow collecting face, the second flow collecting face is recessed along the direction back to the first flow collecting face to form a trapezoidal groove, and the groove wall of the trapezoidal groove and the first flow collecting face jointly enclose a flow collecting space communicated with the first flow pipe and the second flow pipe.

2. The connecting member as claimed in claim 1, wherein the first plate has a first fitting hole formed therein for holding the first flow pipe and a second fitting hole formed therein for holding the second flow pipe, the first and second fitting holes being communicated with the collecting space.

3. The connecting member as claimed in claim 2, wherein the first fitting hole has an edge bent to form a first flange surrounding the first fitting hole in a circumferential direction thereof and adapted to be fitted to the first flow pipe, and the second fitting hole has an edge bent to form a second flange surrounding the second fitting hole in a circumferential direction thereof and adapted to be fitted to the second flow pipe.

4. The connector of claim 3, wherein the first flange and the second flange each enclose a flat tubular structure.

5. A connector according to claim 3, wherein said first and second flanges each extend in a direction away from said second manifold surface.

6. The connector of claim 3, wherein the first collecting surface is recessed in a direction away from the second collecting surface to form a collecting groove, and the first assembly hole, the second assembly hole, the first flange and the second flange are formed on a groove wall of the collecting groove.

7. The connector according to any one of claims 1 to 6, further comprising an intermediate plate sandwiched between the first and second collecting surfaces, wherein a collecting hole is formed at a position of the intermediate plate opposite to the trapezoidal groove.

8. A connector according to claim 7, wherein the notch of said trapezoidal slot is located within the projection of said manifold aperture onto said second manifold surface.

9. A heat exchanger, comprising:

a connector as claimed in any one of claims 1 to 8; and

the first flow pipe and the second flow pipe are arranged on the first plate and are communicated with the flow collecting space.

10. The heat exchanger according to claim 9, wherein the first plate and the second plate are both elongated, the plurality of collecting spaces are arranged at intervals along the length direction of the first plate and/or the second plate, and the plurality of first flow tubes and the plurality of second flow tubes are respectively in one-to-one correspondence with the plurality of collecting spaces.

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