CN110030846A - Three media heat exchangers - Google Patents

Abstract

The invention relates to the field of heat exchange and provides a three-medium heat exchanger. The heat exchanger includes two header tubes and a plurality of heat exchange tubes, the plurality of heat exchange tubes are arranged in sequence along the height direction of the header tubes, and a gap is formed between two adjacent heat exchange tubes to form a third medium channel; One of the headers is provided with a first vertical partition extending along its height direction to separate the inner space of the header into a first tube pass and a second tube pass; the other header is provided with a first vertical partition along its height direction The extended second vertical partition plate is used to separate the inner space of the header into a third tube pass and a fourth tube pass; each heat exchange tube includes an upper flat tube and a lower flat tube attached to the bottom surface of the upper flat tube; The two ends of the upper flat tube are respectively communicated with the first tube pass and the third tube pass to form the first medium channel; the two ends of the lower flat tube are respectively communicated with the second tube pass and the fourth tube pass to form the second medium aisle. The present invention is simple in structure and easy to manufacture, and can realize direct heat exchange of any two media among the three media.

Description

Three medium heat exchanger

technical field

The invention relates to the technical field of heat exchange, in particular to a three-medium heat exchanger.

Background technique

Heat exchangers are widely used in petrochemical, energy, metallurgy, refrigeration, nuclear energy and other industrial fields. In recent years, with the development of industrial technology, more and more occasions require a variety of media to participate in heat exchange, such as dual heat source heat pump, air conditioning exhaust heat recovery system, heat pipe heat pump composite air conditioner for data center cooling, etc.

Existing three-medium heat exchangers are usually of a tubular structure, which mainly includes a first medium inlet pipe, a first medium outlet pipe, a second medium inlet pipe, a second medium outlet pipe, an inner pipe, and a sleeved inner pipe. The outer pipe on the outside, the two ends of the inner pipe are respectively connected with the first medium inlet pipe and the first medium outlet pipe, and the flow channel between the outer pipe and the inner pipe is communicated with the second medium inlet pipe and the second medium outlet pipe . Since the inner tube is surrounded by the second medium, the first medium flowing through the inner tube cannot directly exchange heat with the fluid outside the outer tube, so this heat exchanger can only realize the first medium and the second medium and the second medium. Direct heat exchange with the external fluid of the outer tube cannot achieve direct and efficient heat exchange between the first medium and the external fluid of the outer tube, resulting in low heat transfer efficiency and narrow application range.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a three-medium heat exchanger with simple structure, easy processing and wide application range, which can realize direct heat exchange of any two media among the three media.

In order to achieve the above object, the present invention provides a three-medium heat exchanger, the heat exchanger includes two headers and a plurality of heat exchange tubes arranged between the two headers. The heat exchange tubes are arranged in sequence along the height direction of the headers, and there is a gap between two adjacent heat exchange tubes to form a third medium channel; one of the headers is provided with a first extension extending along its height direction. A vertical partition, the first vertical partition divides the inner space of the header into a first tube side and a second tube side; another header pipe is provided with a second vertical wall extending along its height direction baffle, the second vertical baffle divides the inner space of the header into a third tube pass and a fourth tube pass; each of the heat exchange tubes includes an upper flat tube and a flat tube attached to the upper flat tube. The lower flat tube on the bottom surface of the tube; the two ends of the upper flat tube are respectively communicated with the first tube pass and the third tube pass to form a first medium channel; the two ends of the lower flat tube are respectively connected with the The second pipe side and the fourth pipe side are communicated to form a second medium channel; the header is provided with a first medium inlet and an outlet that communicate with the first medium channel and are connected to the second medium channel. The second medium inlet and outlet communicated with the medium channel.

Wherein, the second tube pass, the first tube pass, the third tube pass and the fourth tube pass are arranged in sequence along the length direction of the heat exchange tube.

Wherein, the second tube pass, the first tube pass, the fourth tube pass and the third tube pass are arranged in sequence along the length direction of the heat exchange tube.

Wherein, the third medium channel is provided with fins.

Wherein, the longitudinal cross-sectional shape of the fins is zigzag.

Wherein, the header is an elliptical column, the long axis of the elliptical column is parallel to the width direction of the upper flat tube and the lower flat tube, and the width of the upper flat tube is the same as the width of the lower flat tube. The widths are all smaller than the length of the major axis of the elliptical cylinder.

Wherein, the upper flat tube and the lower flat tube of the same heat exchange tube are integrally formed or welded together.

Wherein, N first transverse baffles are arranged in the first tube pass, and N first transverse baffles are arranged in sequence along the height direction of the first tube pass, so as to separate the first tube pass from It is divided into N+1 first sub-tube passes from top to bottom; N-1 third transverse baffles are arranged in the third tube pass, and N-1 third transverse baffles are arranged along the third The height directions of the tube passes are arranged in sequence to divide the third tube pass into N third sub-tube passes from top to bottom; the adjacent two first sub-tube passes pass through the upper flat tube that communicates with them. communicates with the corresponding third sub-pipe; wherein, N≥1; the first medium inlet is in communication with the first sub-pipe located at the bottom of the first pipe, and the first medium outlet communicates with the first sub-pipe-pass located at the top of the first pipe-pass.

Wherein, M second diaphragms are arranged in the second pipe pass, and M second transverse diaphragms are arranged in sequence along the height direction of the second pipe pass, so as to separate the second pipe pass from It is divided into M+1 second sub-pipe passes from top to bottom; M-1 fourth transverse baffles are arranged in the fourth pipe pass, and M-1 fourth transverse baffles are arranged along the fourth pipe pass. The height directions of the tube passes are arranged in sequence to divide the fourth tube pass into M fourth sub-tube passes from top to bottom; the adjacent two second sub-tube passes pass through the lower flat tubes communicated with them. communicates with the corresponding fourth sub-pipe; wherein, M≥1; the second medium inlet is in communication with the second sub-pipe located at the top of the second pipe, and the second medium outlet It communicates with the second sub-tube-pass located at the bottom of the second tube-pass.

The invention has a simple structure, can be processed by using the existing mature processing technology of micro-channel heat exchanger, and is convenient for manufacture and installation. In the present invention, the first medium, the second medium and the Direct heat exchange between two mediums, that is, direct heat exchange between the first medium flowing through the upper flat tube and the second medium flowing through the lower flat tube in the same heat exchange tube. At the same time, the third medium flowing between two adjacent heat exchange tubes will directly exchange heat with the first medium in the adjacent upper flat tubes and the second medium in the adjacent lower flat tubes. In addition, the present invention divides one of the headers into the first tube pass and the second tube pass by using the first vertical partition plate, and divides the other header tube into the third tube pass and the fourth tube pass using the second vertical partition plate. The tube side can realize the independent flow and heat exchange of the first medium and the second medium without adding a header.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

1 is a perspective view of a three-medium heat exchanger in an embodiment of the present invention;

Fig. 2 is the longitudinal sectional view of Fig. 1;

3 is a front view of a three-medium heat exchanger in an embodiment of the present invention;

4 is a top view of a three-medium heat exchanger in an embodiment of the present invention;

Figure 5 is a cross-sectional view of Figure 4 at A-A;

Figure 6 is a cross-sectional view of Figure 4 at B-B;

Figure 7 is an enlarged view of Figure 4 at C;

8 is a cross-sectional view of a heat exchange tube in an embodiment of the present invention;

FIG. 9 is a cross-sectional view of another heat exchange tube in an embodiment of the present invention.

Reference number:

1-1, the upper flat tube; 1-2, the lower flat tube; 2, the third medium channel; 3, the collector;

4. The first vertical partition; 5. The second vertical partition; 6. The first pipe pass;

6-1, the first diaphragm; 6-2, the first sub-pipe; 7, the second pipe;

7-1, the second diaphragm; 7-2, the second sub-pipe; 8, the third pipe;

9. The fourth tube pass; 10. The first medium inlet; 11. The first medium outlet;

12. The second medium inlet; 13. The second medium outlet; 14. The fins.

Detailed ways

In order to make the purpose, technical solutions and advantages of the invention clearer, the technical solutions in the invention will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the invention, not all of them. Example. Based on the embodiments in the invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the invention.

In the description of the present invention, unless otherwise specified, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings, only for the purpose of It is convenient to describe the present invention and to simplify the description, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

It should be noted that, unless otherwise expressly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or it can be connected through The intermediary is indirectly connected. For those of ordinary skill in the art, the specific meanings of the above terms in the invention can be understood in specific situations.

With reference to FIGS. 1 to 6 , this embodiment provides a three-medium heat exchanger, which includes two headers 3 and a plurality of heat exchange tubes disposed between the two headers 3 , a plurality of heat exchange tubes are arranged in sequence along the height direction of the header 3, and there is a gap between two adjacent heat exchange tubes to form a third medium channel 2; one of the headers 3 is provided with an extension along its height direction. The first vertical partition plate 4, the first vertical partition plate 4 divides the inner space of the header 3 into a first tube pass 6 and a second tube pass 7; another header 3 is provided with extending along its height direction The second vertical partition plate 5, the second vertical partition plate 5 divides the inner space of the header 3 into a third tube pass 8 and a fourth tube pass 9; each heat exchange tube includes an upper flat tube 1-1 and a The lower flat tube 1-2 covering the bottom surface of the upper flat tube 1-1; the two ends of the upper flat tube 1-1 are respectively communicated with the first tube pass 6 and the third tube pass 8 to form a first medium channel; The two ends of the pipes 1-2 are respectively connected with the second pipe side 7 and the fourth pipe side 9 to form a second medium channel; the header 3 is provided with a first medium inlet and an outlet that communicate with the first medium channel and The second medium inlet and outlet communicated with the second medium channel. For example, the first medium inlet 10 and the second medium inlet 12 are provided on the header 3 having the first pipe side 6 and the second pipe side 7, and the first medium inlet 10 is communicated with the first pipe side 6, and the second pipe side The medium inlet 12 is communicated with the second pipe side 7; the first medium outlet 11 and the second medium outlet 13 are arranged on the header 3 with the third pipe side 8 and the fourth pipe side 9, and the first medium outlet 11 is connected to The third tube pass 8 is communicated with, and the second medium outlet 13 is communicated with the fourth tube pass 9 .

Therefore, after the first medium flows into the first tube pass 6 through the first medium inlet 10 , it will continue to flow into the third tube pass 8 through the upper flat tube 1 - 1 until it flows out from the first medium outlet 11 . At the same time, after the second medium flows into the second tube pass 7 through the second medium inlet 12 , it will continue to flow into the fourth tube pass 9 through the lower flat tube 1 - 2 until it flows out from the second medium outlet 13 . Since the upper flat tube 1-1 and the lower flat tube 1-2 belonging to the same heat exchange tube are in close contact with each other, in the above process, for the same heat exchange tube, the first flat tube 1-1 flowing through the upper flat tube 1-1 A medium can directly exchange heat with the second medium flowing through the lower flat tubes 1-2. At the same time, since there is a third medium channel 2 between two adjacent heat exchange tubes, that is to say, the lower flat tube 1-2 of the upper heat exchange tube among the adjacent two heat exchange tubes is different from the lower flat tube 1-2 of the lower heat exchange tube. There is a gap between the upper flat tubes 1-1 of the heat exchange tubes, so the third medium flowing between two adjacent heat exchange tubes can directly interact with the first medium and the phase in the adjacent upper flat tubes 1-1. The second medium in the adjacent lower flat tube 1-2 directly exchanges heat. Wherein, the first medium is preferably a liquid or gas-liquid two-phase medium; the second medium is preferably a liquid or gas-liquid two-phase medium; the third medium is preferably a gas or a mixed medium of gas and spray liquid.

It can be seen that the heat exchanger has a simple structure, can be processed by using the existing mature processing technology of micro-channel heat exchanger, and is convenient for manufacture and installation. The heat exchanger can be realized by adopting heat exchange tubes in which the upper flat tube 1-1 and the lower flat tube 1-2 are in close contact with each other and maintaining a gap between the two adjacent heat exchange tubes to form a third medium channel 2. There is direct heat exchange between the first medium, the second medium and the third medium, that is, the first medium flowing through the upper flat tube 1-1 and the first medium flowing through the lower flat tube 1-1 in the same heat exchange tube Heat can be directly exchanged between the second mediums of The second medium in the adjacent lower flat tube 1-2 directly exchanges heat. In addition, the present invention divides one of the headers into the first tube pass and the second tube pass by using the first vertical partition plate, and divides the other header tube into the third tube pass and the fourth tube pass using the second vertical partition plate. The tube side can realize the independent flow and heat exchange of the first medium and the second medium without adding a header.

Preferably, the second tube pass 7 , the first tube pass 6 , the third tube pass 8 and the fourth tube pass 9 are arranged in sequence along the length direction of the heat exchange tubes, that is, the first tube pass 6 is located in the second tube pass On the right side of 7, the third tube pass 8 is located on the left side of the fourth tube pass 9, that is, as shown in FIG. 8, the length of the upper flat tube 1-1 is smaller than the length of the lower flat tube 1-2. Of course, as shown in FIG. 9 , the length of the upper flat tube 1-1 and the length of the lower flat tube 1-2 can also be the same. When the tube passes 8 are arranged in sequence along the length direction of the heat exchange tubes, that is, when the first tube pass 6 is located on the right side of the second tube pass 7 and the third tube pass 8 is located on the right side of the fourth tube pass 9, The length of the upper flat tube 1-1 is equal to the length of the lower flat tube 1-2.

Preferably, fins 14 are provided in the third medium channel 2 . The advantage of this arrangement is that it can not only improve the heat exchange efficiency between the third medium and the first medium and the second medium, but also support two adjacent heat exchange tubes and enhance the overall structural stability of the heat exchanger.

Further, the longitudinal cross-sectional shape of the fins 14 is zigzag, that is to say, the fins 14 are formed by connecting a plurality of W-shaped (M-shaped) fins in sequence, and the top ends of the W-shaped (M-shaped) fins are connected with the fins located thereon. The upper lower flat tube 1-2 is connected, and the bottom end of the W-shaped (M-shaped) fin is connected with the upper flat tube 1-1 located below it.

Preferably, as shown in FIG. 7 , the header 3 is an elliptical column, the long axis of the elliptical column is parallel to the width direction of the upper flat tube 1-1 and the lower flat tube 1-2, and the width of the upper flat tube 1-1 is The widths of W and the lower flat tube 1-2 are both smaller than the length D of the major axis of the elliptical cylinder. Further, the header 3 includes a pipe body and two covers, the top and bottom ends of the pipe body are both open, and the two covers are respectively covered on the top and bottom ends of the pipe body.

Preferably, the upper flat tube 1-1 and the lower flat tube 1-2 of the same heat exchange tube are integrally formed, that is, the heat exchange tube is a double-row hole flat tube. Of course, the upper flat tube 1-1 and the lower flat tube 1-2 of the same heat exchange tube can also be directly welded together.

Preferably, the first tube pass 6 is provided with N first transverse baffles 6-1, and the N first transverse baffles 6-1 are arranged in sequence along the height direction of the first tube pass 6, so as to separate the first tube pass 6 is divided into N+1 first sub-pipe passes 6-2 from top to bottom; N-1 third diaphragms are arranged in the third pipe pass 8, and N-1 third diaphragms are arranged along the third The height directions of the tube passes 8 are set in order to divide the third tube pass 8 into N third sub-tube passes from top to bottom; the adjacent two first sub-tube passes 6-2 pass through the upper flat tube 1 that communicates with them. -1 is communicated with the corresponding third sub-tube pass; wherein, N≥1; the first medium inlet 10 is communicated with the first sub-tube pass 6-2 located at the bottom of the first tube pass 6, and the first medium outlet 11 is connected with the first sub-tube pass 6-2 at the bottom The uppermost first sub-tube 6-2 of the first tube 6 communicates with each other.

Further, M second diaphragms 7-1 are arranged in the second pipe pass 7, and M second transverse diaphragms 7-1 are arranged in sequence along the height direction of the second pipe pass 7, so that the second pipe pass 7 is divided into M+1 second sub-pipe passes 7-2 from top to bottom; M-1 fourth diaphragms are arranged in the fourth pipe pass 9, and M-1 fourth diaphragms are arranged along the fourth The height directions of the tube passes 9 are set in order to divide the fourth tube pass 9 into M fourth sub-tube passes from top to bottom; the adjacent two second sub-tube passes 7-2 pass through the lower flat tube 1 that communicates with them. -2 communicates with the corresponding fourth sub-pipe; wherein, M≥1; the second medium inlet 12 is in communication with the second sub-pipe 7-2 located at the top of the second pipe 7, and the second medium outlet 13 is in communication with The second sub-tube-pass 7-2 at the bottom of the second tube-pass 7 communicates with each other.

The structure and principle of the three-medium heat exchanger in this embodiment will be described below by taking N=M=1 as an example: wherein, the first medium inlet 10 , the first medium outlet 11 , the second medium inlet 12 and the second medium The outlets 13 are all arranged on the same collector, and the first medium inlet 10 communicates with the first sub-pipe 6-2 located below the first diaphragm 6-1, and the first medium outlet 11 is connected to the first transverse diaphragm 6-1. The first sub-pipe pass 6-2 above the partition plate 6-1 is communicated with, the second medium inlet 12 is communicated with the second sub-pipe pass 7-2 located above the second diaphragm 7-1, and the second medium outlet 13 is connected to The second sub-tube pass 7-2 located below the second diaphragm 7-1 communicates with each other.

In use: when the first medium is continuously fed into the first sub-tube 6-2 under the first diaphragm 6-1 through the first medium inlet 10, the first medium will flow through the first sub-tube 6-2 in turn. The upper flat tube 1-1 communicated with the sub-tube pass 6-2, the third tube pass 8, the upper flat tube 1-1 communicated with the first sub-tube pass 6-2 located above the first diaphragm 6-1, and The first sub-tube 6-2 located above the first diaphragm 6-1 is finally discharged from the first medium outlet 11. At the same time, when the second medium is continuously fed into the second sub-tube 7-2 located above the second diaphragm 7-1 through the second medium inlet 12, the second medium will flow through the The lower flat tube 1-2 communicated with the two sub-tube passes 7-2, the fourth tube pass 9, and the lower flat tube 1-2 communicated with the second sub-tube pass 7-2 located below the second diaphragm 7-1 and the second sub-tube pass 7-2 located below the second diaphragm 7-1, and finally discharged from the second medium outlet 13. In the above process, the first medium flowing through the upper flat tube 1-1 and the second medium flowing through the lower flat tube 1-2 in the same heat exchange tube directly exchange heat by means of heat conduction and convection. , the third medium flowing between two adjacent heat exchange tubes will directly exchange heat with the first medium in the adjacent upper flat tube 1-1 and the second medium in the adjacent lower flat tube 1-2 at the same time .

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the invention, but not to limit them; although the invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be used for The technical solutions described in the foregoing embodiments are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the invention.

Claims (9)

1. A three-medium heat exchanger, comprising two headers and a plurality of heat exchange tubes arranged between the two headers, wherein a plurality of the heat exchange tubes are arranged along the The flow tubes are arranged in sequence in the height direction, and there is a gap between two adjacent heat exchange tubes to form a third medium channel; one of the headers is provided with a first vertical partition extending along its height direction, and the first vertical partition plate extends along its height direction. A vertical partition divides the inner space of the header into a first tube pass and a second tube pass; another vertical partition extending along the height direction of the header is arranged in the other header, and the second The vertical partition divides the inner space of the header into a third tube pass and a fourth tube pass; each of the heat exchange tubes includes an upper flat tube and a lower flat tube attached to the bottom surface of the upper flat tube; The two ends of the upper flat tube are respectively connected with the first tube pass and the third tube pass to form a first medium channel; the two ends of the lower flat tube are respectively connected with the second tube pass and the third tube pass. The fourth tube side is connected to form a second medium channel; the header is provided with a first medium inlet and an outlet that communicate with the first medium channel and a second medium communicated with the second medium channel import and export. 2 . The three-medium heat exchanger according to claim 1 , wherein the second tube pass, the first tube pass, the third tube pass and the fourth tube pass are along the exchange The length directions of the heat pipes are set in sequence. 3 . The three-medium heat exchanger according to claim 1 , wherein the second tube pass, the first tube pass, the fourth tube pass and the third tube pass are along the exchange The length directions of the heat pipes are set in sequence. 4 . The three-medium heat exchanger according to claim 1 , wherein fins are provided in the third medium channel. 5 . 5 . The three-medium heat exchanger according to claim 4 , wherein the longitudinal cross-sectional shape of the fins is zigzag. 6 . 6 . The three-medium heat exchanger according to claim 1 , wherein the header is an elliptical column, and the long axis of the elliptical column is in the width direction of the upper flat tube and the lower flat tube. 7 . parallel, and the width of the upper flat tube and the width of the lower flat tube are both smaller than the length of the long axis of the elliptical column. 7 . The three-medium heat exchanger according to claim 1 , wherein the upper flat tube and the lower flat tube of the same heat exchange tube are integrally formed or welded together. 8 . The three-medium heat exchanger according to any one of claims 1 to 7, wherein the first tube side is provided with N first diaphragms, and N first diaphragms Arranged in sequence along the height direction of the first tube pass to divide the first tube pass into N+1 first sub-tube passes from top to bottom; N-1 sub-tube passes are arranged in the third tube pass Third diaphragms, N-1 of the third diaphragms are arranged in sequence along the height direction of the third pipe pass, so as to divide the third pipe pass into N third sub-pipes from top to bottom two adjacent first sub-tubes are communicated with the corresponding third sub-tubes through the upper flat tubes communicated with them; wherein, N≥1; the first medium inlet is connected to the The first sub-tube-pass at the bottom of the first tube-pass is in communication, and the first medium outlet is in communication with the first sub-tube-pass at the top of the first tube-pass. 9. The three-medium heat exchanger according to any one of claims 1 to 7, characterized in that, M second diaphragms are arranged in the second tube side, and M second diaphragms are provided. They are arranged in sequence along the height direction of the second tube pass, so that the second tube pass is divided into M+1 second sub-tube passes from top to bottom; M-1 sub-tube passes are arranged in the fourth tube pass Fourth transverse baffles, M-1 of the fourth transverse baffles are arranged in sequence along the height direction of the fourth pipe pass, so as to divide the fourth pipe pass into M fourth sub-pipes from top to bottom two adjacent second sub-tubes are communicated with the corresponding fourth sub-tubes through the lower flat tubes communicated with them; wherein, M≥1; the second medium inlet is connected to the The second sub-tube-pass at the top of the second tube-pass is in communication, and the second medium outlet is in communication with the second sub-tube-pass at the bottom of the second tube-pass.