CN112880465A

CN112880465A - Flow collecting piece and heat exchanger

Info

Publication number: CN112880465A
Application number: CN201911204838.1A
Authority: CN
Inventors: 董军启; 张伟伟; 马峥
Original assignee: Hangzhou Sanhua Research Institute Co Ltd
Current assignee: Hangzhou Sanhua Research Institute Co Ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2021-06-01

Abstract

The application provides a mass flow piece and heat exchanger, the mass flow piece includes passageway and at least one circulation mouth, circulation mouth and passageway intercommunication, the mass flow piece still includes distribution structure, distribution structure includes at least one first cell wall, separate into two at least recesses with distribution structure through first cell wall, first cell wall is located between the adjacent recess, the passageway can communicate with each recess, the interface of passageway roughly is circular, and the extending direction along the passageway, the sectional area of passageway reduces gradually or increases, through setting up the passageway that the sectional area changes, can improve the velocity of flow of heat transfer medium keeping away from circulation mouth position department, make heat transfer medium's whole velocity of flow more even, so that heat transfer medium can evenly distributed in each recess.

Description

Flow collecting piece and heat exchanger

Technical Field

The application relates to the technical field of heat exchange, in particular to a flow collecting piece and a heat exchanger.

Background

Heat exchangers, also known as heat exchangers, are widely used in heat exchange systems (e.g., vehicle air conditioning systems). The heat exchanger can be used for heat exchange between a heat exchange medium and external air, and also can be used for heat exchange between the heat exchange medium and cooling liquid. The related heat exchanger comprises a flow collecting piece, the flow collecting piece is used for realizing flow collecting and distribution of heat exchange media, the flow collecting piece comprises an inlet of the heat exchange media and a flow channel of the heat exchange media, when the heat exchange media flow in the flow channel along the direction far away from the inlet, the flow speed can be gradually reduced, the condition that the heat exchange media are unevenly distributed in the flow collecting piece can occur, and the performance of the heat exchanger is further influenced.

Disclosure of Invention

The application provides a mass flow piece and heat exchanger for solve heat transfer medium and distribute inhomogeneous problem in the mass flow piece.

The embodiment of the application provides a flow collecting piece, which comprises at least one channel and at least one flow through port, wherein the flow through port is communicated with the corresponding channel;

the flow collecting piece comprises a distribution structure, the distribution structure comprises at least two distribution grooves, a first groove wall is arranged between every two adjacent distribution grooves, at least part of the channel penetrates through the first groove wall, and each channel is communicated with at least two distribution grooves;

the cross-sectional area of the channel gradually decreases or increases along its extension.

This application is through designing into the structure that the cross-sectional area changes with the passageway, can change the resistance of heat transfer medium when the passageway flows to change the velocity of flow of heat transfer medium keeping away from the circulation mouth position, make whole velocity of flow more even, make heat transfer medium can be evenly distributed in each distributor trough.

In one possible implementation, the collector comprises a bottom wall and a top wall, the bottom wall and the top wall are oppositely arranged, and the channel is located between the bottom wall and the top wall;

the bottom wall and the top wall are close to or far away from each other along the extending direction of the channel.

Or, the bottom wall is parallel to the extending direction of the channel, and the top wall is gradually close to or far away from the bottom wall along the extending direction of the channel;

or, the top wall is parallel to the extending direction of the channel, and the bottom wall is gradually close to or far away from the top wall.

In one possible implementation, the channel is substantially circular in cross-section.

In a possible implementation manner, the current collecting piece further includes a main body portion, the main body portion is fixedly connected with the distribution structure and is arranged at a connection position in a sealing manner, or the main body portion and the distribution structure are an integrated structure;

the channel is at least partially disposed in the body portion.

In a possible implementation manner, the main body part is provided with a flow channel, the first groove wall is provided with a notch at a position opposite to the flow channel, and the channel comprises the notch, the flow channel and a part of the distribution groove.

In one possible implementation, the collector includes a first projection projecting away from the distribution chute, and at least a portion of the channel is disposed in the first projection.

In a possible implementation manner, the flow collecting piece comprises two flow ports and two channels, the channels and the flow ports are in one-to-one correspondence, and the distribution structure further comprises a second groove wall; the second slot wall is located between two channels, which are separated by the second slot wall.

An embodiment of the present application further provides a heat exchanger, the heat exchanger includes:

a first and a second flow collector, each comprising a distribution structure, at least one channel, and at least one flow port;

the distribution structure comprises at least two distribution grooves, a first groove wall is arranged between every two adjacent distribution grooves, and each channel is communicated with at least two distribution grooves;

at least part of the channel penetrates through the first groove wall, the channel is communicated with the distribution groove, and the cross section area of the channel is gradually reduced or increased along the extension direction of the channel;

and the heat exchange tubes are arranged corresponding to the distribution grooves, the tube walls of the heat exchange tubes at two ends are respectively fixedly connected with the corresponding first groove walls and are arranged at the connection parts in a sealing manner, and the channels of the first flow collecting piece are communicated with the channels of the second flow collecting piece through the inner cavities of the heat exchange tubes.

The application provides a first mass flow piece and second mass flow piece of heat exchanger are through designing the structure that the cross-sectional area changes into with the passageway, can change the resistance when heat transfer medium flows in the passageway, thereby change the velocity of flow of heat transfer medium keeping away from the circulation mouth position, make first mass flow piece, the whole velocity of flow of heat transfer medium is more even in the second mass flow piece, make heat transfer medium can be evenly distributed to each distributor box in, the heat transfer medium flow in each heat exchange tube is even, heat transfer medium is abundant relatively in each heat exchange tube, can improve the holistic work efficiency of heat exchanger.

In one possible implementation manner, the heat exchanger comprises a shell, the shell is located between the first collecting piece and the second collecting piece, and the first collecting piece and the second collecting piece are fixedly connected with the shell and are arranged at the connection position in a sealing mode;

the shell is enclosed to form a first cavity, and at least part of the heat exchange tube is positioned in the first cavity;

the shell comprises a second inlet and a second outlet which are communicated with the first cavity, a third channel is formed between every two adjacent heat exchange tubes, and the second inlet and the second outlet are communicated with the third channels.

In a possible implementation manner, the shell comprises a first end and a second end which are arranged oppositely, a second protruding portion is arranged near the first end of the shell, a third protruding portion is arranged near the second end of the shell, the second protruding portion and the third protruding portion both protrude towards the outer side of the shell, and the second protruding portion and the third protruding portion are arranged approximately along the arrangement direction of the heat exchange tubes;

the second inlet is arranged on the second boss, the second outlet is arranged on the third boss, the second boss and the third boss are respectively positioned on two opposite sides of the shell, and the second inlet and the second outlet are arranged in diagonal angles;

the second boss comprises a second cavity, the third boss comprises a third cavity, and the second inlet, the second cavity, the first cavity, each third channel, the third cavity and the second outlet are communicated;

the cross-sectional area of the second cavity gradually increases or decreases in a direction away from the second inlet, and the cross-sectional area of the third cavity gradually increases or decreases in a direction away from the second outlet.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

Fig. 1 is a schematic structural diagram of a current collector provided in an embodiment of the present application;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1, wherein the channel is a first embodiment;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1, wherein the channel is a second embodiment;

FIG. 4 is a side view of FIG. 1, wherein the cross-sectional shape of the channel is a first embodiment;

FIG. 5 is a side view of FIG. 1, wherein the cross-sectional shape of the channel is a second embodiment;

FIG. 6 is a side view of FIG. 1, wherein the cross-sectional shape of the channel is a third embodiment;

FIG. 7 is a bottom view of a current collector provided by an embodiment of the present application;

FIG. 8 is a cross-sectional view taken along line B-B of FIG. 7;

fig. 9 is a schematic structural diagram of a main body provided in an embodiment of the present application;

FIG. 10 is a schematic view of the structure of FIG. 9 from another perspective;

FIG. 11 is a schematic structural diagram of a distribution structure provided in an embodiment of the present application;

fig. 12 is a bottom view of another embodiment of a current collector provided by an embodiment of the present application;

FIG. 13 is a cross-sectional view taken along the line C-C of FIG. 12;

FIG. 14 is a schematic structural diagram of a heat exchanger provided in an embodiment of the present application;

FIG. 15 is a side view of FIG. 14;

FIG. 16 is a cross-sectional view taken along line D-D of FIG. 15, wherein the heat exchanger is a first embodiment;

FIG. 17 is a cross-sectional view taken along line D-D of FIG. 15, wherein the heat exchanger is a second embodiment;

fig. 18 is a schematic structural diagram of a motherboard provided in an embodiment of the present application;

FIG. 19 is a schematic structural diagram of a heat exchange tube provided in an embodiment of the present application;

FIG. 20 is a schematic structural diagram of a housing provided in an embodiment of the present application;

FIG. 21 is a top view of FIG. 20;

FIG. 22 is a cross-sectional view taken along direction E-E of FIG. 21;

FIG. 23 is a schematic structural diagram of a third protrusion according to an embodiment of the present disclosure;

FIG. 24 is a top view of FIG. 23;

FIG. 25 is a cross-sectional view taken along the direction F-F of FIG. 24;

FIG. 26 is a schematic structural diagram of another embodiment of a second protrusion according to an embodiment of the present disclosure;

FIG. 27 is a top view of FIG. 26;

FIG. 28 is a cross-sectional view taken along the line G-G of FIG. 27;

FIG. 29 is a schematic structural diagram of another embodiment of a third protrusion according to an embodiment of the present disclosure;

FIG. 30 is a top view of FIG. 29;

fig. 31 is a sectional view taken along the direction H-H in fig. 30.

Detailed Description

For better understanding of the technical solutions of the present application, the following detailed descriptions of the embodiments of the present application are provided with reference to the accompanying drawings.

It should be understood that the embodiments described are only a few embodiments of the present application, and not all 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 application.

The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of 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 term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It should be noted that the terms "upper", "lower", "left", "right", and the like used in the embodiments of the present application are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element via an intermediate element.

At present, the heat exchanger is by the wide application in heat transfer system, heat transfer system passes through the heat exchanger and realizes carrying out the purpose of heat exchange with the external world, the heat exchanger includes the mass flow piece, the mass flow piece is provided with the passageway, heat transfer medium passes through the passageway and flows into or flow out the heat exchange tube, realize the reposition of redundant personnel and/or the mass flow to heat transfer medium through the mass flow piece, under the ordinary condition, the passageway of mass flow piece keeps unchangeable along its extending direction sectional area, however when heat transfer medium flows along the direction of keeping away from the entry in the passageway, there is flow resistance, make the velocity of flow reduce gradually, this phenomenon can lead to getting into the mass production difference of the heat transfer medium of different heat exchange tubes, thereby lead to appearing the uneven.

In order to solve the technical problem, the embodiment of the application provides the flow collecting piece 1, and the flow collecting piece 1 can uniformly distribute the heat exchange medium and improve the working efficiency of the heat exchanger.

As shown in fig. 1 to 8, the current collecting member 1 provided in the embodiment of the present application has a channel 11 and a flow opening 12, the flow opening 12 is communicated with the channel 11, and the heat exchange medium can enter the channel 11 through the flow opening 12, and meanwhile, the current collecting member 1 further includes a distribution structure 13, and the distribution structure 13 includes a plurality of distribution grooves 133 and a plurality of first groove walls 131 enclosing the distribution grooves 133. In some embodiments, the collecting member 1 may have two or more channels 11, and the channels 11 are not communicated with each other, and a plurality of distribution grooves 133 are correspondingly disposed in each channel 11.

In this embodiment, the plurality of first groove walls 131 are arranged and distributed along the extending direction of the channel 11, the first groove walls 131, a portion of the channel 11 penetrates each first groove wall 131, the channel 11 is communicated with each distribution groove 133, the heat exchange medium can enter each distribution groove 133 through the channel 11, the cross section of the channel 11 is substantially circular, and the cross section of the channel 11 is gradually reduced or increased along the extending direction of the channel 11.

In a possible embodiment, when the heat exchange medium is in a liquid state or a gas-liquid two-phase state and the liquid state has a large proportion, the heat exchange medium enters the channel 11 of the current collecting piece 1 along the flow port 12, and when the flow rate of the liquid is constant, the flow area is smaller, the flow speed of the liquid is faster, therefore, the channel 11 of the current collecting piece 1 can be set as follows: along the direction of keeping away from flow port 12, the sectional area of passageway 11 reduces gradually, thereby makes liquid heat transfer medium along the in-process of this passageway 11 flow, and compare along the passageway 11 that the cross-sectional area is the same flow, the velocity of flow v1 of liquid heat transfer medium increases gradually, simultaneously, because there is the on-way loss in the liquid heat transfer medium along the flow process of passageway 11, namely along the direction of keeping away from flow port 12, the velocity of flow v2 of liquid heat transfer medium reduces gradually, consequently, the in-process of liquid heat transfer medium along this passageway 11, the velocity of flow v (v 1+ v2) everywhere is roughly the same, thereby can improve the homogeneity of liquid heat transfer medium velocity of flow, and then reduce the risk that the liquid heat transfer medium distributes inhomogeneously because of the velocity of liquid heat transfer medium along the difference of passageway 11.

In another possible embodiment, when the heat exchange medium is in a gaseous state, the gaseous heat exchange medium enters the channel 11 along the flow port 12, and when the heat exchange medium is in a gaseous state, the larger the cross-sectional area of the channel 11, the smaller the resistance to gas flow, and the faster the flow speed. Thus, the channels 11 of the collector 1 may be arranged as: along the direction of keeping away from flow port 12, the sectional area of passageway 11 increases gradually, thereby make gaseous heat transfer medium in this passageway 11 flow in-process, compared with along the passageway 11 that the same sectional area flows, the velocity of flow v3 of gaseous heat transfer medium increases gradually, simultaneously because there is the on-way loss in gaseous heat transfer medium along the passageway 11 flow in-process, namely along the direction of keeping away from flow port 12, the velocity of flow v4 of gaseous heat transfer medium reduces gradually, therefore gaseous heat transfer medium is at everywhere the velocity of flow v (v ═ v3+ v4) is roughly the same in the process of flowing along this passageway 11 of gaseous heat transfer medium, thereby can improve the homogeneity of gaseous heat transfer medium velocity of flow, and then reduce the risk that the velocity of flow of gaseous heat transfer medium along passageway 11 causes gaseous heat transfer medium to distribute inhomogeneously because of gaseous heat transfer.

Therefore, in this embodiment, by setting the channel 11 of the current collector 1 to have a structure in which the sectional area gradually changes, when the heat exchange medium enters the channel 11 through the circulation port 12 and flows in the channel 11, the uniformity of the flow of the heat exchange medium in the channel 11 can be improved, so that the risk of uneven distribution of the heat exchange medium due to uneven flow velocity is reduced, and the working efficiency of the heat exchanger is improved.

In addition, when the manifold 1 with gradually changing channel 11 cross-sectional area is used for liquid heat exchange medium and gas heat exchange medium, the positions of the flow ports 12 are opposite, so that the liquid heat exchange medium flows along the direction of reducing channel 11 cross-sectional area, and the gas heat exchange medium flows along the direction of increasing channel 11 cross-sectional area.

That is, when the heat exchanger is used as an evaporator, when a liquid or gas-liquid two-phase heat exchange medium enters the current collecting piece 1, the flow port 12 serves as an inlet, the cross-sectional area of the channel 11 corresponding to the current collecting piece 1 is gradually reduced along the direction far away from the inlet, and the heat exchange medium is changed into a gas state or a gas-liquid two-phase after absorbing heat and evaporating in the heat exchanger. When the heat exchanger is used as a condenser, when gaseous heat exchange medium enters the current collecting piece 1, the flow port 12 is used as an inlet, the sectional area of the channel 11 corresponding to the current collecting piece 1 is gradually increased along the direction far away from the inlet, and the heat exchange medium is changed into liquid or gas-liquid two-phase after heat release through the heat exchanger.

In some embodiments, the two circulation ports 12 are respectively disposed at two opposite ends of the channel 11 of the collecting member 1, and the areas of the two circulation ports 12 are different, so that a user can select different circulation ports 12 as inlets of the heat exchange medium according to actual needs, and the heat exchanger can be switched between a condenser and an evaporator, so that the functions of the heat exchanger are richer.

In a specific embodiment, the channels 11 of the header 1 may have a tapered configuration to improve the uniformity of the flow rate of the heat exchange medium.

Specifically, as shown in fig. 2, the collector 1 may include a bottom wall 112 and a top wall 111 arranged along the extending direction of the channel 11, the bottom wall 112 and the top wall 111 are arranged oppositely, the bottom wall 112 and the top wall 111 are directly connected by an arc wall and enclose the channel 11, the bottom wall 112 and the top wall 111 are both arranged obliquely so that they can gradually approach each other or separate from each other along the extending direction of the channel 11, so that the channel 11 forms a conical structure, the top wall 111 and the bottom wall 112 both approach towards the axis of the channel 11, and the axis of the channel 11 is parallel or approximately parallel to the axis of the collector 1. This design facilitates machining of channel 11 at collector 1 without the need to reposition collector 1 again according to the axis of channel 11 during machining of channel 11.

On the basis of the above embodiment, the present application provides another embodiment, wherein the channel 11 includes a top wall 111 and a bottom wall 112, which are oppositely disposed, and are disposed along the extending direction of the channel 11, the top wall 111 may be parallel to the extending direction of the channel 11, the bottom wall 112 gradually approaches or departs from the top wall 111 along the extending direction of the channel 11, or the bottom wall 112 may be parallel to the extending direction of the channel 11, and the top wall 111 gradually approaches or departs from the bottom wall 112, such a design can facilitate the formation of the channel 11 with a tapered structure.

As shown in fig. 3, the present embodiment provides a flow collecting member 1, in which a bottom wall 112 is parallel to the extending direction of a channel 11, and a top wall 111 is inclined with respect to the bottom wall 112 so that the top wall 111 can be gradually close to or away from the bottom wall 112 along the extending direction of the channel 11, which can facilitate the installation of heat exchange tubes 2, and the heat exchange tubes 2 can be communicated with the channel 11 by inserting the same depth of distribution grooves 133 into each heat exchange tube 2 when the heat exchange tubes 2 are installed, without adjusting the insertion depth of the heat exchange tubes 2 according to each distribution groove 133, thereby simplifying the operation steps and saving time.

As shown in fig. 4 and 5, the cross-sectional shape of the channel 11 may be circular or oval, and this design facilitates the machining of the channel 11, and the machining may be performed by drilling when the channel 11 is machined, which is convenient for operation.

As shown in fig. 5 and 6, a part of the wall 113 of the channel 11 enclosing the channel 11 may be an arc, another part may be a plane, the channel 11 may be composed of an arc surface and a plane, or may be composed of two arc surfaces and two planes, the arc surface may increase the sectional area of the channel 11, increase the area of the channel 11 for circulating the heat exchange medium, and then the flow rate of the heat exchange medium in the channel 11 may be increased, the plane may reduce the flow resistance of the heat exchange medium, and reduce the influence of the channel 11 on the flow of the heat exchange medium. In a possible embodiment, the bottom surface of the channel 11 is a plane, and such a design can further reduce the resistance when the heat exchange medium flows, which is more beneficial to improving the uniformity of the flow velocity of the heat exchange medium.

As shown in fig. 7 and 8, the current collector 1 may further include a main body portion 14, the main body portion 14 is connected to the distributing structure 13, and when the main body portion 14 and the distributing structure 13 are of a split structure, the connection between the main body portion 14 and the distributing structure 13 needs to be sealed, so as to reduce the possibility of leakage of the heat exchange medium, and the sealing manner is mainly filled by flowing into a gap between the main body portion 14 and the distributing structure 13 after the flux is melted at a high temperature. In a possible embodiment, the main body portion 14 and the distribution structure 13 are an integral structure, the channel 11 is at least partially disposed in the main body portion 14, the circulation port 12 may be disposed in the main body portion 14, and the design of the main body portion 14 and the distribution structure 13 integrally formed is beneficial to improving the sealing performance of the collecting piece 1 and reducing the possibility of occurrence of accidents of heat exchange medium leakage, thereby ensuring the working efficiency of the heat exchanger.

In one possible embodiment, as shown in fig. 9-11, the main body 14 and the distribution structure 13 are separate structures that are fixedly connected, such as by brazing. The main body 14 is provided with a flow channel 141, the long side wall of the first groove wall 131 is provided with a notch 131a, the position of the notch 131a corresponds to the flow channel 141, and the notch 131a is recessed toward a direction away from the main body 14. When the main body 14 is fixedly connected to the distribution structure 13, the gap 131a, the flow channel 141 and a part of the distribution groove 133 form the channel 11 for the heat exchange medium. The main body 14 and the distribution structure 13 are provided separately to facilitate processing of the runner 141 and the notch 131 a.

As shown in fig. 1, the present application provides an embodiment in which the main body portion 14 includes the first projecting portion 15, and the first projecting portion 15 projects in a direction away from the distribution groove 133, and at least a part of the channel 11 is provided in the first projecting portion 15, that is, the current collecting member 1 is only projected at a position where the channel 11 is provided, and such a design can ensure that the current collecting member 1 has a sufficient space for providing the channel 11 and contribute to an increase in the sectional area of the channel 11, and at the same time, can reduce the thickness of the current collecting member 1 at a position where the channel 11 is not provided, thereby reducing the use of the entire material of the current collecting member 1, reducing the weight, and reducing the cost.

In the above embodiments, the header 1 comprises a channel 11, i.e. the heat exchange medium can flow into the channel 11 through the flow openings 12 and enter the distribution device along the channel 11, or the heat exchange medium flows into the channel 11 through the heat exchange tubes and flows out of the channel 11 along the flow openings 12.

As shown in fig. 12 and 13, the present application also provides an embodiment, wherein the current collector 1 may include a first flow port 121, a second flow port 122, a first channel 114 and a second channel 115, the current collector 1 may further include a second channel wall 132, the second channel wall 132 is disposed between the first channel 114 and the second channel 115, and the first channel 114 and the second channel 115 are separated by the second channel wall 132, wherein the first flow port 121 may be communicated with the first channel 114, and the second flow port 122 may be communicated with the second channel 115, such a design may realize bidirectional flow of a heat exchange medium in the heat exchanger when the current collector 1 is applied to the heat exchanger, the heat exchange medium may flow into the heat exchange tube 2 along one of the first channel 114 and the second channel 115, and flow into and flow out of the other heat exchange tube 2, the flow of the heat exchange medium and the flow of the heat exchange medium are both in the same current collector 1, and the flow of the heat exchange medium in the heat exchanger is increased, the heat absorption or heat release capacity of the heat exchange medium is fully exerted, and the heat exchange capacity and the working efficiency of the heat exchanger are improved.

Based on the current collecting piece 1 described in the above embodiments, the present application also provides a heat exchanger, which can be used as a condenser or an evaporator by replacing different heat exchange media, for example, the heat exchange medium is carbon dioxide. In one possible embodiment, the heat exchange medium is in a liquid state, and the heat exchange medium can undergo a phase change by absorbing heat and be converted into a gaseous state, at which time the heat exchanger can be used as an evaporator.

Specifically, as shown in fig. 14 to 19, the heat exchanger may include a first collecting member 16, a second collecting member 17 and a heat exchange tube 2, the heat exchange tube 2 may be a microchannel flat tube, and has two opposite ends, i.e., a first end 21 and a second end 22, the first collecting member 16 and the second collecting member 17 are connected to the first end 21 and the second end 22, respectively, and the connection portions are fixed by brazing and sealing. The first collecting flow piece 16 and the second collecting flow piece 17 each comprise a distribution structure 13, at least one channel 11 and at least one flow opening 12, and the heat exchange medium can enter the heat exchange tube 2 through the first collecting flow piece 16 and flow along the heat exchange tube 2 into the second collecting flow piece 17, and can also enter the heat exchange tube 2 through the second collecting flow piece 17 and flow along the heat exchange tube 2 into the first collecting flow piece 16. The end of the heat exchange tube 2 can be installed in the distribution groove 133 of the current collector 1, the outer tube wall of the heat exchange tube 2 is fixed with the first groove wall 131 by brazing, each micro-channel in the heat exchange tube 2 is communicated with the channel 11 through the distribution groove 133, so that a heat exchange medium can enter the heat exchange tube 2 through the channel 11, and heat exchange is performed on the heat exchange medium to be condensed or evaporated in the heat exchanger through the heat exchange tube 2, so that the heat exchange medium is condensed or evaporated.

The channels 11 of the first collecting piece 16 and the second collecting piece 17 may be in a tapered structure, that is, the sectional area of the channel 11 gradually increases or decreases along the extending direction of the channel 11, so as to improve the flow rate of the heat exchange medium, reduce the possibility of uneven distribution of the heat exchange medium due to the reduction of the flow rate of the heat exchange medium, and improve the overall working efficiency of the heat exchanger.

As shown in fig. 14 and fig. 15, the heat exchanger may further include a shell 3, the first collecting member 16 and the second collecting member 17 are fixedly connected to the shell 3 by brazing, the shell 3 encloses a first cavity 31, the heat exchange tubes 2 are at least partially located in the first cavity 31, and a third channel 39 is formed between the heat exchange tubes 2. The shell 3 is provided with a second inlet 32 and a second outlet 33 which are communicated with the first cavity 31, the second inlet 32 and the second outlet 33 are communicated with each third channel 39, and cooling liquid enters the first cavity 31 enclosed by the shell 3 through the second inlet 32 and contacts with the outer side of the heat exchange tube 2, so that heat exchange media in the heat exchange tube 2 can fully exchange heat with the heat exchange media, the integral working efficiency of the heat exchanger is improved, wherein the cooling liquid can be mixed liquid of ethanol and water.

In order to facilitate the installation of the heat exchange tube 2, in the embodiment provided in the present application, the current collector 1 may be connected to the heat exchange tube 2 through the main plate 4, as shown in fig. 18, wherein the main plate 4 includes a mounting hole 41 and a mounting structure 42, the main plate 4 is connected to the current collector 1 through the mounting structure 42, the mounting structure 42 may protrude from the surface of the main plate 4, when installed, the mounting structure 42 is inserted into the distribution groove 133 of the current collector 1, the mounting hole 41 may be disposed on the mounting structure 42 and penetrate through two sides of the main plate 4, the end of the heat exchange tube 2 is mounted to the mounting hole 41, the tube wall of the heat exchange tube 2 and the hole wall of the mounting hole are fixed by brazing, and meanwhile, the main plate 4 may include a flange 43, and is fixed by brazing with the housing 3 of the heat. The surface of the main plate 4 is coated with welding flux for brazing and fixing the heat exchange tubes 2 and the main plate 4 and the current collecting piece 1, and the welding flux flows into a connecting gap at high temperature so as to seal and fix the connecting part among the main plate 4, the heat exchange tubes 2 and the current collecting piece 1.

As shown in fig. 16, the present application provides an embodiment in which the heat exchanger is a single-pass heat exchanger, i.e., the flow direction of the heat exchange medium in each heat exchange tube 2 is the same, and specifically, the first header 16 may be provided with a third flow port 161, the second header 17 may be provided with a fourth flow port 171, and the third flow port 161 and the fourth flow port 171 may be provided at the ends of the first header 16 and the second header 17 in the length direction X of the first header 16 and the second header 17 and communicate with the channels 11, such a design being capable of facilitating the injection of the heat exchange medium in use.

The heat exchange medium can enter the channels 11 of the first current collector 16 along the third flow ports 161, then enter the distribution grooves 133 of the distribution structure 13 along the channels 11, enter the heat exchange tubes 2 through the respective distribution grooves 133, enter the distribution structure 13 of the second current collector 17 along the inner chambers of the heat exchange tubes 2, enter the channels 11 of the second current collector 17 through the distribution structure 13, and flow out along the fourth flow ports 171, completing the heat exchange process.

In one possible embodiment, two flow openings 12 may be provided at each end of the first collecting member 16, both flow openings 12 may be used as the third flow openings 161, and two flow openings 12 may be provided at each end of the second collecting member 17, both flow openings 12 may be used as the fourth flow openings 171. In the embodiment provided by the present application, the channels 11 of the header 1 are tapered, and when the heat exchange medium is a liquid, in one possible design, the third circulation ports 161 are disposed on the side where the cross-sectional area of the channels 11 is large, and the fourth circulation ports 171 are disposed on the side where the cross-sectional area of the channels 11 is small.

When the heat exchange medium enters the heat exchanger in a liquid state, the heat exchange medium enters the first flow collecting piece 16 along the third flow port 161, the sectional area of the channel 11 is gradually reduced, so that the uniformity of the flow rate of the liquid can be improved, the heat exchange medium is uniformly distributed, and the liquid heat exchange medium enters the channel 11 of the second flow collecting piece 17 after exchanging heat with the cooling liquid in the first cavity 31 through the heat exchange tube 2 and flows out through the fourth flow port 171.

When the heat exchange medium enters the heat exchanger in a gaseous state, the heat exchange medium enters the channel 11 of the second flow collecting piece 17 along the fourth flow port 171, and because the sectional area of the second flow collecting piece 17 is gradually increased along the direction away from the fourth flow port 171, the flow resistance of the gas is reduced, the uniformity of the flow velocity of the gas can be improved, so that the heat exchange medium uniformly enters the distribution structure 13, enters the heat exchange tube 2 through the distribution structure 13, exchanges heat with the cooling liquid in the first cavity 31, flows into the channel 11 of the first flow collecting piece 16, and flows out through the third flow port 161.

The heat exchanger that this application embodiment provided can include four circulation port 12, when the heat exchanger uses as condenser or evaporimeter, can choose suitable circulation port 12 for use according to the demand, and circulation port 12 that is not used can carry out the shutoff through setting up stifled cap 18, and wherein, this stifled cap 18 can dismantle with circulation port 12 and be connected.

As shown in fig. 17, an embodiment is provided for the present application, wherein the heat exchanger is a two-pass heat exchanger, i.e. the flow direction of the heat exchange medium in at least some of the heat exchange tubes 2 is opposite to the flow direction in still other heat exchange tubes 2.

Specifically, the first header 16 may include a fifth flow port 162, a sixth flow port 163, and a second groove wall 132, the header inner chamber is partitioned into the first channel 114 and the second channel 115 by the second groove wall 132, the fifth flow port 162 communicates with the first channel 114, the sixth flow port 163 communicates with the second channel 115, and the heat exchange medium may flow along the fifth flow port 162 or the sixth flow port 163 into the distribution structure 13 communicating with the portion of the channels 11 and into the heat exchange tubes 2 communicating with the portion of the distribution structure 13, flow along the heat exchange tubes 2 into the channels 11 of the second header 17 and flow toward the other side of the channels 11 into another portion of the heat exchange tubes 2, flow along the heat exchange tubes 2 into the second channel 115 of the first header 16, and flow out from the sixth flow port 163. The design can increase the time (increase the flow) that the heat transfer medium is located in the heat exchanger, makes the abundant heat absorption of heat transfer medium or release heat, and the heat transfer is more even, improves heat transfer medium's utilization ratio to improve whole heat exchanger's availability factor.

As shown in fig. 14 and 15, in order to further improve the working efficiency of the heat exchanger, a second convex portion 34 and a third convex portion 35 may be provided on the housing 3, the second convex portion 34 and the third convex portion 35 are convex toward the outside of the housing 3, and both the second convex portion 34 and the third convex portion 35 may be of a hollow structure, wherein the second convex portion 34 includes a second cavity 341, the third convex portion 35 includes a third cavity 351, the second inlet 32 is provided on the second convex portion 34, and is communicated with the first cavity 31 and each third channel 39 through the second cavity 341, the second outlet 33 is provided on the third convex portion 34, and is communicated with the first cavity 31 and each third channel 39 through the third cavity 351, and each second cavity 341 and each third channel 351 are used as a confluence space for the cooling liquid, so that the cooling liquid can uniformly flow into each third channel 39, and the working efficiency of the heat exchanger is improved.

Since there is a loss of the cooling liquid along the way in the flowing process, which results in a slowing down of the flow speed and affects the uniformity of distribution, the present embodiment provides a heat exchanger, wherein the sectional area of the second cavity 341 gradually increases or decreases in the direction away from the second inlet 32, and the sectional area of the third cavity 351 gradually increases or decreases in the direction away from the second outlet 33.

The housing 3 may be a square structure, which includes a first surface 301 and a second surface 302, the first surface 301 and the second surface 302 are disposed on two opposite sides of the heat exchanger along the width direction Y, wherein the two inlets 32 are disposed on the first surface 301, the second outlet 33 is disposed on the second surface 302, and the two are disposed diagonally, it should be noted that the square structure referred to herein is not a square structure in an absolute sense but an approximate square structure, and similarly, the second inlet 32 and the second outlet 33 are disposed diagonally and not an oblique diagonal in an absolute sense but an approximate diagonal position, and such an arrangement can increase the distance for the cooling liquid to flow in the heat exchanger, increase the flow time, make the cooling liquid fully contact with the heat exchange medium for heat exchange, and the cooling liquid sequentially enters the third channels 39 along the height direction X, the uniformity of its distribution is improved, the work efficiency of heat exchanger is improved, and such design can make the heat exchanger relatively flat along direction of height X's surface simultaneously, makes the heat exchanger be convenient for put.

As shown in fig. 20 to 25, the embodiment of the present application provides a heat exchanger, wherein the height of the second protrusion 34 gradually decreases along the direction away from the second inlet 32, the height of the third protrusion 35 gradually decreases along the direction away from the second outlet 33, and the cross-sectional areas of the second cavity 341 and the third cavity 351 are reduced in a manner of decreasing the heights, so that the uniformity of the flow rate of the cooling liquid is enabled to be uniformly distributed to the third channels 39, and the working efficiency of the heat exchanger is improved.

As shown in fig. 26 to 31, the present embodiment provides a heat exchanger, wherein each of the second convex portion 34 and the third convex portion 35 includes a first convex section 36, a second convex section 37 and a third convex section 38, the cross-sectional area of the first convex section 36 is larger than that of the third convex section 38, in a possible implementation manner, the cross-sectional area of the first convex section 36 may be larger than that of the third convex section 38 in the width direction Z, the second convex section 37 is used for communicating the first convex section 36 and the third convex section 38, the second inlet 32 and the second outlet 33 are respectively arranged on the corresponding first convex section 36, the cross-sectional areas of the second cavity 341 and the third cavity 351 in the direction far away from the second inlet 32 or the second outlet 33 are gradually reduced by reducing the width of the third convex section 38, the heights of the second convex portion 34 and the third convex portion 35 are unchanged, such that the processing of the second convex portion 34 and the third convex portion 35 is facilitated, meanwhile, the distance of the heat exchanger in the width direction Y can be reduced, the occupied space of the heat exchanger is reduced, and the heat exchanger is convenient to place and use.

To sum up, the flow collecting piece 1 provided by the application can enable heat exchange media to be uniformly distributed in each heat exchange tube 2 by setting the channel 11 to be a tapered structure with a variable sectional area, so that the overall working efficiency of the heat exchanger is improved, and meanwhile, the shell 3 of the heat exchanger is provided with the second bulge part 34 and the third bulge part 35 with variable sectional areas, so that cooling liquid is uniformly distributed in the third channel 39 between the heat exchange tubes 2, the cooling liquid is fully contacted with the heat exchange tubes 2, and the working efficiency of the heat exchanger is further improved.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A collector piece (1), characterized in that said collector piece (1) comprises at least one channel (11) and at least one through-flow opening (12), said through-flow opening (12) being in communication with the corresponding channel (11);

the collecting piece (1) comprises a distribution structure (13), the distribution structure (13) comprises at least two distribution grooves (133) and a first groove wall (131) positioned between two adjacent distribution grooves, at least part of the channel (11) penetrates through the first groove wall (131), and each channel (11) is communicated with at least two distribution grooves;

the cross-sectional area of the channel (11) is gradually reduced or increased along the extension direction thereof.

2. Manifold (1) according to claim 1, characterized in that said manifold (1) comprises a bottom wall (112) and a top wall (111), said bottom wall (112) and said top wall (111) being oppositely disposed, said channel (11) being located between said bottom wall (112) and said top wall (111);

the bottom wall (112) and the top wall (111) are close to or far away from each other along the extension direction of the channel (11);

or, the bottom wall (112) is parallel to the extension direction of the channel (11), and the top wall (111) is gradually close to or far away from the bottom wall (112) along the extension direction of the channel (11);

or, the top wall (111) is parallel to the extending direction of the channel (11), and the bottom wall (112) is gradually close to or far away from the top wall (111).

3. Manifold (1) according to claim 1 or 2, characterized in that said channels (11) are substantially circular in cross section.

4. The current collector (1) according to claim 1 or 2, characterized in that the current collector (1) further comprises a body portion (14), the body portion (14) is fixedly connected with the distribution structure (13) and is arranged in a sealing manner at the connection, or the body portion (14) and the distribution structure (13) are of an integral structure;

the channel (11) is at least partially disposed in the body portion (14).

5. Manifold (1) according to claim 4, characterized in that said main body (14) is provided with flow channels (141), said first channel wall (131) being provided with notches (131a) at opposite positions of said flow channels (141), said channel (11) comprising portions of each of said notches (131a), said flow channels (141) and said distribution groove (133).

6. Manifold (1) according to claim 1 or 2, characterized in that the manifold (1) comprises a first projection (15), the first projection (15) projecting away from the distribution groove (133), at least part of the channel (11) being provided at the first projection (15).

7. Manifold (1) according to claim 1 or 2, characterized in that said manifold (1) comprises two communication ports (121, 122) and two channels (114, 115), channels (114, 115) and communication ports (121, 122) being in one-to-one correspondence, said distribution structure further comprising a second channel wall (132); the second groove wall (132) is located between two channels (114, 115), the two channels (114, 115) being separated by the second groove wall (132).

8. A heat exchanger, characterized in that the heat exchanger comprises:

a first and a second collecting part (16, 17), each of said first and second collecting parts (16, 17) comprising a distribution structure (13), at least one channel (11) and at least one through-flow opening (12);

the distribution structure (13) comprises at least two distribution grooves (133) and a first groove wall (131) between two adjacent distribution grooves, at least part of the channel (11) penetrates through the first groove wall (131), and each channel (11) is communicated with at least two distribution grooves;

the cross-sectional area of the channel (11) is gradually reduced or increased along the extension direction thereof;

the heat exchange tubes (2) are correspondingly arranged on the distribution grooves (133), the tube walls of the heat exchange tubes (2) at two ends are respectively fixedly connected with the corresponding first groove walls (131) and are arranged at the connection part in a sealing manner, and the channels (11) of the first flow collecting piece (16) are communicated with the channels (11) of the second flow collecting piece (17) through the inner cavities of the heat exchange tubes (2).

9. The heat exchanger according to claim 8, characterized in that the heat exchanger comprises a housing (3), the housing (3) is located between the first collecting piece (16) and the second collecting piece (17), the first collecting piece (16) and the second collecting piece (17) are fixedly connected with the housing (3) and are arranged in a sealing manner at the connection;

the shell (3) comprises a first cavity (31), and at least part of the heat exchange tube (2) is positioned in the first cavity (31);

the shell (3) comprises a second inlet (32) and a second outlet (33) which are communicated with the first cavity (31), a third channel (39) is formed between every two adjacent heat exchange tubes (2), and the second inlet (32) and the second outlet (33) are communicated with the third channels (39).

10. The heat exchanger according to claim 9, wherein the shell (3) comprises a first end and a second end which are oppositely arranged, the shell (3) is provided with a second boss (34) near the first end, the shell (3) is provided with a third boss (35) near the second end, the second boss (34) and the third boss (35) are both protruded toward the outer side of the shell (3), and the second boss (34) and the third boss (35) are arranged substantially along the arrangement direction of the heat exchange tubes (2);

the second inlet (32) is arranged on the second protruding portion (34), the second outlet (33) is arranged on the third protruding portion (35), and the second protruding portion (34) and the third protruding portion (35) are respectively located on two opposite sides of the shell (3);

the second boss (34) comprises a second cavity (341), the third boss (35) comprises a third cavity (351), the second inlet (32), the second cavity (341), the first cavity (31), each third channel (39), the third cavity (351), the second outlet (33) communicate;

-the cross-sectional area of the second cavity (341) gradually increases or decreases in a direction away from the second inlet (32); and/or the cross-sectional area of the third cavity (351) gradually increases or decreases in a direction away from the second outlet (33).