WO2014059893A1

WO2014059893A1 - Heat exchanger

Info

Publication number: WO2014059893A1
Application number: PCT/CN2013/084977
Authority: WO
Inventors: 董洪洲; 唐燕栋
Original assignee: 三花控股集团有限公司; 丹佛斯公司
Priority date: 2012-10-15
Filing date: 2013-10-10
Publication date: 2014-04-24
Also published as: CN202885598U

Abstract

A heat exchanger, comprising a flow collecting pipe (2); one side of the flow collecting pipe (2) is provided with a plurality of interfaces for inserting flat pipes (3); the flow collecting pipe (2) is also provided with a plate-shaped distributor (1) therein; a first opening (11) for distributing or collecting a medium is disposed on the plate of the plate-shaped distributor (1); the farther the longitudinal distance to the communication port (21) of the flow collecting pipe (2) in communication with an external medium pipe is, the larger the transverse size of the first opening (11) is; the plate-shaped distributor (1) can properly adjust the medium flow at different positions in the flow collecting pipe (2); on the flat pipes (3) close to or far from the communication port (21) of the flow collecting pipe (2), the plate-shaped distributor (1) can partially block the medium flow path, so as to prevent the medium just flowing into the flow collecting pipe or at the end of the flow collecting pipe (2) from directly flowing back into the flat pipes (3), thus solving the problem of dramatic change of flow rate on the flat pipes (3) closest to or farthest from the external medium communication port (21) of the flow collecting pipe (2), and facilitating the control of uniformly distributing medium flow among the flat pipes (3).

Description

A heat exchanger is claimed in the Chinese Patent Application No. 201220526862.4, the entire disclosure of which is incorporated herein by reference. In this application. Technical field

The present invention relates to the field of heat exchange technology, and more particularly to a heat exchanger.

Background technique

The heat exchanger is a device that realizes heat transfer between cold and hot fluids, and is widely used in fields such as HVAC.

Please refer to FIG. 1. FIG. 1 is a schematic structural view of a typical heat exchanger in the prior art. Only a partial schematic view of the guide tube is provided. For other parts, please refer to the prior art.

A typical heat exchanger includes two collector tubes 平行 parallel to each other, and a plurality of heat exchange tubes disposed substantially in parallel between the two collector tubes, and corrugations between adjacent heat exchange tubes Fin 4'. The two manifolds are provided with a plurality of heat exchange interfaces on the corresponding pipe wall along the length direction thereof, and two ends of the heat exchange tubes are respectively inserted into the heat exchange interfaces on the manifolds to realize two sets. Flow tube 1 'connected. In order to realize the distribution or collection of the internal medium of the header 在 in each flat tube 3', a distributor 2' is also arranged in the header Γ.

Referring again to FIG. 1, the structure of the dispenser 2 in the prior art is as shown in the figure. The distributor 2 is a metal guiding tube. One end of the tube is inserted into the bottom of the collecting tube, and the end is sealed, and the guiding tube is simultaneously The side faces are provided with holes or slots at a certain distance along the length thereof, and the refrigerant can be distributed and collected into the flat tubes 3' through the holes or slots in the draft tube to realize the circulation of the medium.

In the prior art heat exchanger, the structure of the distributor 2' is responsible for the distribution or collection of the refrigerant in a certain area of the flat tube 3, and a hole or groove corresponds to the plurality of flat tubes 3, so that the hole or The refrigerant flowing out of the trough is partially redistributed. Even if the flow rate in each hole or trough is hooked, the uneven flow in the adjacent flat tubes 3 cannot be avoided, resulting in the refrigerant in all the flat tubes. 3, between the wave type distribution, making the secondary distribution uneven.

Moreover, the dispenser 2 of the above structure has a complicated opening or grooving process.

Therefore, how to provide a heat exchanger in which a refrigerant between a flat tube and a header Summary of the invention

SUMMARY OF THE INVENTION It is an object of the present invention to provide a heat exchanger in which the distribution or collection of the medium between the flat tube and the header is relatively uniform.

In order to achieve the above object, the present invention provides a heat exchanger including a header, one side of the header is provided with a plurality of interfaces for inserting a heat exchange tube, and the inside of the header is also provided a plate-shaped dispenser, the plate body of the distributor is provided with a first opening for media distribution or collection, and the further the longitudinal distance from the communication port of the collecting pipe to the external medium pipe, the first opening The larger the lateral size.

Preferably, the number of the first openings is one.

Preferably, the communication port is disposed on one end surface of the header, and the longitudinal section of the first opening is substantially in the shape of a triangle or a trapezoid or a parabola extending in the axial direction of the header.

Preferably, the first opening is further disposed with a second opening near the end of the communication port, and the second opening is disposed corresponding to the initial heat exchange port of the end portion, and the closer to the longitudinal distance of the communication port Its lateral size is larger.

Preferably, the end of the first opening away from the communication port is further provided with a third opening, the third opening is disposed corresponding to the end heat exchange port of the end portion, and the further the longitudinal distance from the communication port is Its lateral size is smaller.

Preferably, the communication port is disposed on both end faces of the header, and the lateral dimension of the first opening gradually increases from both ends toward the middle.

Preferably, the communication port is disposed on a peripheral wall of the header, and a lateral dimension of the first opening gradually increases from a position corresponding to the communication port to both end portions of the header.

Preferably, the number of the communication ports is at least two, and the two communication ports are arranged parallel to the axial direction of the header, and the lateral dimension of the first opening is from the communication port to the adjacent two communication ports. The position of the intermediate portion or the end portion of the header gradually becomes larger.

Preferably, the plate body is a flat plate structure. The convex structure or the convex surface of the curved structure faces one side of the heat exchange tube interface. The heat exchanger provided by the present invention comprises a collecting pipe, one side of the collecting pipe is provided with a plurality of interfaces for inserting heat exchange tubes, and the inside of the collecting pipe is further provided with a plate-shaped distribution a first opening for media distribution or collection is disposed on the plate body of the distributor, and the further the longitudinal distance from the communication port of the current collecting pipe connecting the external medium pipe, the greater the lateral dimension of the first opening .

Different from the prior art, the size of the first opening in the header for distributing or collecting the medium is gradual, and the further the longitudinal distance from the communication port of the collector to the external medium line, the first opening The larger the lateral dimension, the first opening on the distributor acts as a distribution channel to better adjust the flow of the medium at different parts of the header. The design of the first opening takes into account that the medium is different in the manifold. The flow resistance, flow rate and other factors in the position area are on the flat tube which is close to and farther from the communication port of the external medium line, and the structure of the distributor can partially block the medium flow path, avoiding just The inflowing medium or the backflow of the medium at the end of the collecting pipe directly enters the flat pipe, thereby solving the problem that the flow rate on the flat pipe near the outer and outermost areas of the external medium communication port of the collecting pipe is drastically changed, which is advantageous for controlling the flow rate of the medium in each Evenly distributed between the flat tubes.

Moreover, the dispenser of the structure can also change the flow field and flow area of the two-phase flow, and the eddy current brings the gas-liquid two phases to be better mixed.

DRAWINGS

1 is a schematic structural view of a typical heat exchanger in the prior art;

2 is a partial schematic view of a first embodiment of a heat exchanger provided by the present invention; FIG. 3 is a cross-sectional view of the A-A direction of FIG. 2;

Figure 4 is a cross-sectional view showing a second embodiment of the heat exchanger according to the present invention; Figure 5 is a cross-sectional view showing a third embodiment of the heat exchanger according to the present invention; FIG. 7 is a cross-sectional view showing a fifth embodiment of the heat exchanger according to the present invention; FIG. 8 is a cross-sectional view showing a fifth embodiment of the heat exchanger provided by the present invention; FIG. 9 is a cross-sectional view showing a seventh embodiment of the heat exchanger according to the present invention; FIG. 10 is an eighth embodiment of the heat exchanger according to the present invention. FIG. 11 to FIG. 13 are schematic diagrams of dispensers of different shapes and configurations provided by the present invention. Wherein, the correspondence between the part name and the mark symbol in FIGS. 1 to 13 is as follows: the collector tube, the distributor 2', the flat tube 3', the fin 4';

The distributor 1, the first opening 11, the second opening 12, the third opening 13, the collecting pipe 2, the communication port 21, and the flat tube 3.

detailed description

The core of the present invention is to provide a heat exchanger in which the distribution or collection of the medium between the flat tube and the header is relatively uniform.

In order to enable a person skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail by taking the collecting pipe as a circular pipe as an example, in conjunction with the drawings and specific embodiments. It should be understood that the headers include, but are not limited to, circular tubes, and other shaped structures such as squares may also satisfy the needs of the present invention.

2, FIG. 3 and FIG. 4, FIG. 2 is a partial schematic view of a first embodiment of a heat exchanger according to the present invention; FIG. 3 is a cross-sectional view of the A-Α direction of FIG. 2; A schematic cross-sectional view of a second embodiment of a heat exchanger provided by the invention.

In a first embodiment, the heat exchanger provided by the present invention comprises a header 2, and one side of the header 2 is provided with a plurality of interfaces for inserting the heat exchange tubes, and the inside of the header 2 is further A plate-like dispenser 1 is provided, and the specific mounting position of the dispenser 1 in the header 2 is as shown in Figs. 2 and 3. The circumferential surface of the distributor 1 is attached to the inner wall of the header 2, and the distributor 1 can be fixed in the header 2 by welding or the like. Specifically, the circumference of the distributor 1 can be welded to the header 2 , may also be locally welded, for example, welded at both ends or both sides; thereby dividing the header 2 into two chambers along the axial direction of the header 2, and the interface for inserting the heat exchange tube is located in one of the chambers On the wall, the cavity wall of the other chamber is provided with a communication port 21 communicating with the external medium pipe, and the plate body of the distributor 1 is provided with a first opening 11 for media distribution or collection, and the distributor 1 is installed in the set. After the flow tube 2 is disposed, the first opening 11 generally corresponds to the interface of the heat exchange tube, and the further the longitudinal distance of the communication opening 21 of the current collecting tube 2 from the external medium line is, the larger the lateral dimension of the first opening 11 is.

Different from the prior art, the size of the first opening 11 for collecting or collecting the medium in the header 2 is gradual, and the further the longitudinal distance from the communication port 21 of the collector 2 communicating with the external medium line is further. The larger the lateral dimension of the first opening 11 is, the design shape of the first opening 11 is fully considered. The flow resistance, flow rate and the like of the medium in different positions of the header 2, the first opening 11 on the distributor 1 as a distribution channel can better adjust the flow of the medium in different parts of the header 2, On the flat tube 3 which is closer to and farther from the communication port 21 of the external medium line from the header 2, the structure of the distributor 1 can partially block the medium flow path, avoiding the medium or current that has just flowed in. The medium returning at the end of the tube 2 directly enters the flat tube 3, thereby solving the problem that the flow rate on the flat tube 3 in the nearest and farthest area near the external medium communication port 21 of the collecting tube 2 is drastically changed, which is advantageous for controlling the flow rate of the medium in each flat The tubes 3 are evenly distributed.

Moreover, the distributor 1 of the structure can also change the flow field and flow area of the two-phase flow, and the eddy current brings about better mixing of the gas-liquid two phases.

It should be pointed out that "longitudinal" in this paper refers to the axial direction of the header 2, correspondingly

"Lateral" refers to the direction perpendicular to the axis of the header 2, and it can also be understood that "lateral" is the radial direction of the header 2.

Specifically, the number of the first openings 11 may be one, the axial extension of the parallel header 2, and may be disposed at a central symmetrical position of the distributor 1, and the number thereof may also be set according to actual use, and uniformly arranged On the dispenser 1.

The number of the first openings 11 in the distributor 1 is relatively small, the structure is simple, the processing process is relatively simple, the assembly efficiency of the heat exchanger can be improved, and the use cost of the heat exchanger can be reduced.

The arrangement of the number of the first openings 11 mentioned in the following embodiments is substantially the same as that of the embodiment, and similarities will not be described again.

The structure of the dispenser 1 disposed in the corresponding heat exchanger will be specifically described below for several heat exchangers of different structures. Of course, those skilled in the art should understand that the specific structure of the dispenser 1 includes but is not limited to Several forms are described.

In the second embodiment, the communication port 21 of the header 2 that communicates with the external pipe in the heat exchanger is disposed on one end surface of the header 2, and correspondingly, the longitudinal cross-sectional shape of the first opening 11 is substantially It is designed as a triangular structure extending axially along the header 2 (as shown in Figure 3), and may also be trapezoidal (as shown in Figure 4) or closed parabolic or other shape.

The conventional triangular structure or trapezoidal structure is relatively simple, and the general size of the designer can be quickly determined by the practical experience of the designer, the design efficiency is improved, and the use requirement is met. Of course, the specific size and shape of the first opening 11 of the heat exchanger in different use environments. Accurate design can be done by computer simulation. Please refer to FIG. 5. FIG. 5 is a schematic cross-sectional view showing a third embodiment of the heat exchanger provided by the present invention.

The third embodiment of the dispenser 1 provided by the present invention is mainly based on the improvement of the second embodiment described above.

In the third embodiment, the first opening 11 of the dispenser 1 provided by the present invention may further be provided with a second opening 12 near the end of the communication port 21, and the second opening 12 corresponds to the end portion. The initial heat exchange ports are arranged such that the closer to the longitudinal distance of the communication port 21, the larger the lateral dimension thereof. According to practical experience, the longitudinal length of the second opening 12 does not exceed the pitch of the initial three flat tubes 3.

In the third embodiment, the dispenser 1 provided by the present invention further considers the flow rate of the heat exchange tube near the communication port 21 of the header 2, and the second opening 12 can effectively adjust the connection to the collector 2 The flow rate of the heat exchange tubes at the port 21 is advantageous for improving the uniform distribution or collection between the header tubes 2 and the heat exchange tubes.

Figure 6 is a schematic cross-sectional view showing a fourth embodiment of the heat exchanger according to the present invention; the fourth embodiment is a further improvement in the first and second embodiments above.

In a fourth embodiment, a third opening 13 is further disposed at an end of the first opening 11 away from the communication port 21, and the third opening 13 is disposed at an end heat exchange port corresponding to the end portion, and the distance is The further the longitudinal distance of the communication port 21 is, the smaller the lateral dimension is.

In the fourth embodiment, the dispenser 1 provided by the present invention further considers the flow of the medium near the end heat exchange tube at the communication port 21 of the header 2, and the opening of the third opening 13 can effectively avoid the change from the end. The reflux of the medium near the heat pipe is beneficial to increase the uniform distribution or collection between the header 2 and the heat exchange tube.

It should be noted that the initial heat exchange port and the end heat exchange port described in this paper are based on the flow direction of the medium, and the heat exchange port near the inlet end of the medium is the initial heat exchange port, and the heat exchange away from the end of the medium inlet. The mouth is the end heat exchange port.

Of course, in combination with the advantages of the above embodiments, the dispenser 1 can be further designed as shown in Fig. 7, and Fig. 7 is a cross-sectional view showing a fifth embodiment of the heat exchanger provided by the present invention.

Please refer to FIG. 8. FIG. 8 is a sixth embodiment of a heat exchanger according to the present invention. Schematic cross-sectional view;

In the sixth embodiment, the communication port 21 connecting the external pipelines on the header 2 of the heat exchanger may also be disposed on both end faces of the header 2, that is, both ends of the header 2 The communication opening 21 is provided, and the lateral dimension of the first opening 11 gradually increases from the both ends to the middle. Of course, the shape of the first opening 11 may be a structure symmetrically arranged along a cross section of the maximum width thereof, or may be a maximum width. The two parts on both sides of the cross section are asymmetric structures, as long as the technical effects of the present invention can be achieved.

The seventh specific embodiment and the eighth specific embodiment are mainly directed to the description of the case where the communication port is provided on the peripheral wall of the header.

Please refer to FIG. 9. FIG. 9 is a cross-sectional view showing a seventh embodiment of the heat exchanger according to the present invention.

In a seventh embodiment, a communication port 21 for connecting the external pipe on the header 2 of the heat exchanger is disposed on the peripheral wall of the header 2, and the lateral dimension of the first opening 11 is connected to the The corresponding position of the port 21 gradually increases toward both end portions of the header 2.

Please refer to FIG. 10, which is a cross-sectional view of an eighth embodiment of a heat exchanger according to the present invention.

In the eighth embodiment, the number of the communication ports 21 of the header 2 that communicates with the external pipeline is at least two, and the two communication ports 21 are arranged parallel to the axial direction of the header 2, and the first opening 11 The lateral dimension gradually increases from the communication port 21 to the position between the adjacent two communication ports 21 or the end portion of the header 2.

For the above embodiments, the distributor 1 may be a flat structure having a relatively simple process structure, or may be a bent structure or a curved structure, and the convex structure or the convex surface of the curved structure faces the heat exchange tube interface. Side, for ease of understanding, this paper takes the end of the communication port at the end of the manifold as an example, and gives several specific implementations. Please refer to FIG. 2 and FIG. 11 to FIG. 13 again. FIG. 2 shows a kind of Schematic diagram of a dispenser of a specific flat structure, and FIG. 11 shows a schematic view of a dispenser having two bent surfaces, the first opening being disposed on a bent portion of the two-folded curved surface, and FIG. 12 is a A schematic view of a dispenser having a plurality of curved faces, and a schematic view of a smooth curved surface is shown in FIG.

This makes it possible to use a variety of sheet processing heat exchanger dispensers 1 to increase the flexibility of processing. When the communication port 21 is disposed at other positions of the header 2, the shape of the distributor 1 can be referred to the above description, and the details of the heat exchanger provided by the present invention include, but are by no means limited to, the above embodiments.

The heat exchanger provided by the present invention has been described in detail above. The principles and embodiments of the present invention have been described herein with reference to specific examples, and the description of the above embodiments is merely to assist in understanding the method of the present invention and its core idea. It should be noted that those skilled in the art can make various modifications and changes to the present invention without departing from the spirit and scope of the invention.

Claims

Rights request

1. A heat exchanger, including a header (2). One side of the header (2) is provided with a number of interfaces for inserting heat exchange tubes. It is characterized in that the header (2) 2) is also provided with a plate-shaped distributor (1) inside. The plate body of the distributor (1) is provided with a first opening (11) for medium distribution or collection, which is connected to the header pipe (2). The farther the longitudinal distance of the communication port (21) of the external medium pipeline is, the larger the transverse size of the first opening (11) is.

2. The heat exchanger according to claim 1, characterized in that the number of the first opening (11) is one.

3. The heat exchanger according to claim 2, characterized in that the communication port (21) is provided on one end surface of the header (2), and the longitudinal section of the first opening (11) The general shape is a triangle, trapezoid or parabola extending along the axial direction of the header (2).

4. The heat exchanger according to claim 3, characterized in that the end of the first opening (11) close to the communication port (21) is also provided with a second opening (12), and the second opening (12) is The opening (12) is arranged corresponding to the initial heat exchange port at the end, and the closer the longitudinal distance to the communication port (21) is, the larger its transverse size is.

5. The heat exchanger according to claim 3 or 4, characterized in that the end of the first opening (11) away from the communication port (21) is also provided with a third opening (13), The third opening (13) is provided corresponding to the end heat exchange port at this end, and the further the longitudinal distance between the third opening (13) and the communication port (21) is, the smaller its transverse size is.

6. The heat exchanger according to claim 2, characterized in that the communication port (21) is provided on both end surfaces of the header (2), and the lateral size of the first opening (11) It gradually increases from both ends to the middle.

7. The heat exchanger according to claim 2, characterized in that the communication port (21) is provided on the peripheral wall of the header (2), and the lateral size of the first opening (11) is from The positions corresponding to the communication port (21) gradually increase toward both ends of the header (2).

8. The heat exchanger according to claim 7, characterized in that the number of the communication ports (21) is at least two, and the two communication ports (21) are parallel to the axial direction of the header (2) Arranged, the transverse dimension of the first opening (11) extends from each communication port (21) to two adjacent communication ports (21) The size between the position or the end of the header (2) gradually becomes larger.

9. The heat exchanger according to any one of claims 1 to 8, characterized in that the plate body has a flat plate structure.

10. The heat exchanger according to any one of claims 1 to 8, characterized in that the plate body is a bending structure or a curved surface structure that is bent along its length direction, and the bending structure or the curved surface The convex surface of the structure faces the heat exchange tube interface side.