CN110671954B

CN110671954B - Heat exchanger

Info

Publication number: CN110671954B
Application number: CN201810709363.0A
Authority: CN
Inventors: 姚磊; 马明; 冯钊赞; 李奎; 王春燕
Original assignee: CRRC Zhuzhou Institute Co Ltd
Current assignee: CRRC Zhuzhou Institute Co Ltd
Priority date: 2018-07-02
Filing date: 2018-07-02
Publication date: 2021-09-03
Anticipated expiration: 2038-07-02
Also published as: CN110671954A

Abstract

The invention discloses a heat exchanger which comprises a shell, wherein a cavity is arranged in the shell, at least one heat exchange core with a plate-fin structure is arranged in the cavity, the heat exchange core comprises a cold side fluid inlet and a cold side fluid outlet, a hot side fluid inlet is arranged on one side of the shell, and a hot side fluid outlet is arranged on the other side of the shell. The invention has the advantages of compact structure, small flow resistance, high fluid infusion efficiency and the like.

Description

Heat exchanger

Technical Field

The invention relates to heat dissipation equipment, in particular to a heat exchanger.

Background

The plate-fin heat exchanger has higher heat exchange performance and compact structure, can effectively reduce the occupied space relative to a shell-and-tube heat exchanger, but the size of a flow passage at the condensation side of the existing plate-fin heat exchanger is smaller, the steam supplement efficiency is lower, the flow resistance is large, and steam blockage and liquid blockage are easy to occur. The common shell-and-tube heat exchanger has high steam supplement efficiency and small flow resistance, but the structure is not compact enough due to the large size of the tube side. In addition, the heat exchange cores of the existing various heat exchangers are limited by installation results, and the replacement and the maintenance are very inconvenient.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide the heat exchanger which is compact in structure, small in flow resistance and high in liquid supplementing efficiency.

In order to solve the technical problems, the invention adopts the following technical scheme:

the heat exchanger comprises a shell, wherein a cavity is formed in the shell, at least one heat exchange core of a plate fin structure is arranged in the cavity, the heat exchange core comprises a cold side fluid inlet and a cold side fluid outlet, a hot side fluid inlet is formed in one side of the shell, and a hot side fluid outlet is formed in the other side of the shell.

As a further improvement of the above technical solution: the heat exchange core is characterized in that one end of the heat exchange core is provided with a connecting part, the other opposite end of the heat exchange core is provided with a convex part, the inner wall of the shell is provided with a supporting part, the supporting part is supported below the convex part, the connecting part is positioned outside the shell and detachably connected with the shell, and the cold side fluid inlet and the cold side fluid outlet extend to the connecting part.

As a further improvement of the above technical solution: the connecting part is a flange part, and the flange part is connected with the shell through a fastening piece.

As a further improvement of the above technical solution: the heat exchange core is of a cuboid structure, and the flange portion is of a rectangular structure.

As a further improvement of the above technical solution: the supporting part is of a right-angled triangle structure, and two right-angled sides respectively correspond to the shell and the convex part.

As a further improvement of the above technical solution: the heat exchange cores are two or more.

As a further improvement of the above technical solution: the shell is of a cuboid structure, and the heat exchange cores are arranged along the long edge direction of the shell.

As a further improvement of the above technical solution: the side of each heat exchange core provided with the cold-side fluid inlet and the cold-side fluid outlet is positioned on the same side of the shell.

As a further improvement of the above technical solution: one side of each heat exchange core, which is provided with a cold-side fluid inlet and a cold-side fluid outlet, is respectively positioned at two opposite sides of the shell.

As a further improvement of the above technical solution: the hot side fluid outlet is arranged at the bottom of the shell, and the height of the hot side fluid inlet is greater than that of the hot side fluid outlet.

As a further improvement of the above technical solution: the number of the hot-side fluid inlets is two, each heat exchange core is located between the two hot-side fluid inlets, and the hot-side fluid outlet is located between the two hot-side fluid inlets.

As a further improvement of the above technical solution: the heat exchange core is provided with a plurality of heat exchange cores, the heat exchange cores are arranged around the heat exchange cores, and the heat exchange cores are arranged in the heat exchange cores.

Compared with the prior art, the invention has the advantages that: the heat exchanger disclosed by the invention comprises a shell with a cavity and a heat exchange core arranged in the cavity of the shell, wherein steam is introduced into the shell side and condensed after heat exchange. The shell side has the structural characteristic of a relatively large cavity, and compared with a plate-fin heat exchanger, the plate-fin heat exchanger has the characteristics of small flow resistance and high liquid supplementing efficiency, and can obviously reduce vapor blockage and liquid blockage; the heat exchange core adopts a plate-fin structure, has higher heat exchange performance and compact structure, and can effectively reduce the occupied space compared with a shell-and-tube heat exchanger.

Drawings

Fig. 1 is a schematic perspective view of a heat exchanger according to a first embodiment of the present invention.

Fig. 2 is a schematic perspective view of a heat exchange core in the present invention.

Fig. 3 is a schematic perspective view of a second embodiment of the heat exchanger of the present invention.

Fig. 4 is a schematic perspective view of a third embodiment of the heat exchanger of the present invention.

The reference numerals in the figures denote: 1. a housing; 11. a hot side fluid inlet; 12. a hot side fluid outlet; 13. a support portion; 2. a heat exchange core; 21. a cold side fluid inlet; 22. a cold-side fluid outlet; 23. a connecting portion; 24. a convex portion; 25. fin flow channels; 3. a cavity.

Detailed Description

The invention is described in further detail below with reference to the figures and specific examples of the specification.

Example one

Fig. 1 to 2 show an embodiment of a heat exchanger according to the present invention, the heat exchanger of the embodiment includes a shell 1, a cavity 3 is disposed inside the shell 1, and at least one heat exchange core 2 of a plate fin structure is disposed in the cavity 3, the heat exchange core 2 includes a cold-side fluid inlet 21 and a cold-side fluid outlet 22, a hot-side fluid inlet 11 is disposed on one side of the shell 1, and a hot-side fluid outlet 12 is disposed on the other side of the shell 1.

In operation of the heat exchanger, cold side fluid enters the heat exchange core 2 through the cold side fluid inlet 21, passes through the internal fin flow channels 25, and exits through the cold side fluid outlet 22. Hot side fluid enters the cavity 3 from the hot side fluid inlet 11 in the form of steam, heat exchange and condensation are carried out through the fin flow channels 25 on the heat core 2, and the condensed liquid is discharged through the hot side fluid outlet 12. The shell side has the structural characteristic of a relatively large cavity, and compared with a plate-fin heat exchanger, the plate-fin heat exchanger has the characteristics of small flow resistance and high liquid supplementing efficiency, and can obviously reduce vapor blockage and liquid blockage; the heat exchange core 2 adopts a plate-fin structure, has higher heat exchange performance and compact structure, and can effectively reduce the occupied space compared with a shell-and-tube heat exchanger. Wherein, the plate-fin structure is the existing heat exchange structure and is not described again.

Further, in the present embodiment, one end (front end in fig. 1) of the heat exchange core 2 is provided with a connection portion 23, and the other end (correspondingly, rear end in fig. 1) of the heat exchange core 2 is provided with a protrusion 24, a support portion 13 is provided on the inner wall of the casing 1, the support portion 13 is supported below the protrusion 24, the connection portion 23 is located outside the casing 1 and detachably connected to the casing 1, and the cold-side fluid inlet 21 and the cold-side fluid outlet 22 both extend to the connection portion 23. Utilize supporting part 13 to provide support, connecting portion 23 and can dismantle with casing 1 and be connected for convex part 24, both realized heat exchange core 2's reliable installation, the change of the heat exchange core 2 of being convenient for again, maintain, particularly, with connecting portion 23 and casing 1 separation, can take heat exchange core 2 out from cavity 3.

Furthermore, in the embodiment, the connecting portion 23 is a flange portion, and the flange portion is connected to the housing 1 through a fastener, that is, the heat exchange core 2 is connected to the housing 1 through a flange. Of course, in other embodiments, the connecting portion 23 may be detachably connected to the housing 1 by means of a snap-fit or the like.

Preferably, heat transfer core 2 is the cuboid structure, is convenient for according to total heat transfer volume, adjusts heat transfer core 2's quantity to the matrix is extended, is convenient for carry out the modularized design. Correspondingly, the flange part also adopts a rectangular structure, so that the flange part is uniformly stressed in all directions, and in other embodiments, the flange part also can adopt a common circular structure and can realize a detachable connection function.

Preferably, the supporting portion 13 is a right triangle structure, and two right-angled sides correspond to the shell 1 and the convex portion 24 respectively, the supporting portion 13 occupies a small space in the cavity 3, and has good mechanical properties, so as to provide reliable support for each heat exchange core 2. Of course, in other embodiments, the supporting portion 13 may have other structures, such as a step structure, and may also perform the supporting function.

Further, the number of the heat exchange cores 2 is two or more, the casing 1 has a rectangular parallelepiped structure, and each heat exchange core 2 is arranged along the long side direction (the left and right direction in fig. 1) of the casing 1.

Further, a hot side fluid outlet 12 is provided at the bottom of the housing 1, and the height of the hot side fluid inlet 11 is greater than that of the hot side fluid outlet 12. The hot side fluid outlet 12 is arranged at the bottom of the shell 1, condensed liquid is gathered to the bottom of the shell 1 under the action of gravity and then flows out through the hot side fluid outlet 12, and the heat exchanger is simple in structure and convenient to use. In this embodiment, the hot side fluid inlet 11 is provided in the middle of the left side wall of the housing 1.

Example two

Fig. 3 shows another embodiment of the heat exchanger of the present invention, the heat exchanger of this embodiment includes a shell 1, a cavity 3 is provided inside the shell 1, and two heat exchange cores 2 with plate-fin structure are arranged in the cavity 3, the heat exchange cores 2 include a cold-side fluid inlet 21 and a cold-side fluid outlet 22, one side of the shell 1 is provided with a hot-side fluid inlet 11, and the other side of the shell 1 is provided with a hot-side fluid outlet 12. The heat exchange core 2 is provided with a connecting part 23 at the front end and a convex part 24 at the rear end, the inner wall of the shell 1 is provided with a supporting part 13, the supporting part 13 is supported below the convex part 24, the connecting part 23 is positioned outside the shell 1 and detachably connected with the shell 1, and the cold-side fluid inlet 21 and the cold-side fluid outlet 22 both extend to the connecting part 23. Utilize supporting part 13 to provide support, connecting portion 23 and can dismantle with casing 1 and be connected for convex part 24, both realized heat exchange core 2's reliable installation, the change of the heat exchange core 2 of being convenient for again, maintain, particularly, with connecting portion 23 and casing 1 separation, can take heat exchange core 2 out from cavity 3. Furthermore, in the embodiment, the connecting portion 23 is a flange portion, and the flange portion is connected to the housing 1 through a fastener, that is, the heat exchange core 2 is connected to the housing 1 through a flange. Of course, in other embodiments, the connecting portion 23 may be detachably connected to the housing 1 by means of a snap-fit or the like. Preferably, heat transfer core 2 is the cuboid structure, is convenient for according to total heat transfer volume, adjusts heat transfer core 2's quantity to the matrix is extended, is convenient for carry out the modularized design. Correspondingly, the flange part also adopts a rectangular structure, so that the flange part is uniformly stressed in all directions, and in other embodiments, the flange part also can adopt a common circular structure and can realize a detachable connection function.

The difference lies in that, in this embodiment, there are two hot side fluid inlets 11, each heat exchange core 2 is located between two hot side fluid inlets 11, and the hot side fluid outlet 12 is located between two hot side fluid inlets 11, that is, the two hot side fluid inlets 11 are arranged oppositely from left to right, which is beneficial to the hot side fluid and each heat exchange core 2 to fully exchange heat, and improve the heat exchange efficiency. The condensed liquid is collected to the middle hot-side fluid outlet 12 and is discharged.

EXAMPLE III

Fig. 4 shows another embodiment of the heat exchanger of the present invention, and the structure of the heat exchanger of this embodiment is substantially the same as that of the first embodiment, except that in this embodiment, the heat exchange core 2 is provided with a plurality of heat exchange cores, and the hot-side fluid inlet 11 is also provided with a plurality of heat exchange cores and arranged around each heat exchange core 2, and the hot-side fluid outlet 12 is located at the center of the plurality of hot-side fluid inlets 11. For example, the casing 1 of the rectangular parallelepiped structure is adopted, the middle parts of four side surfaces of the casing 1 are respectively provided with a hot-side fluid inlet 11, which is beneficial to fully exerting the heat exchange capability of each heat exchange core 2 and improving the heat exchange efficiency, correspondingly, the hot-side fluid outlet 12 is positioned at the center of the bottom of the casing 1, the steam of each hot-side fluid inlet 11 enters the casing 1 and then exchanges heat with the heat exchange core 2, and the condensed liquid is collected to the hot-side fluid outlet 12 at the center and then is discharged.

As a further preferable technical solution, the connecting portion 23 of the partial heat exchange core 2 is located at the front side of the shell 1, and the corresponding convex portion 24 is located at the rear side of the shell 1; the connection part 23 of the partial heat exchange core 2 is positioned at the rear side of the shell 1, and the corresponding convex part 24 is positioned at the front side of the shell 1, so that the functions can be realized.

As a further preferable technical solution, the aperture of the hot-side fluid outlet 12 may be set to be larger than the aperture of the hot-side fluid inlet 11, so as to facilitate rapid discharge of the condensed liquid.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.

Claims

1. A heat exchanger, characterized by: comprises a shell (1), a cavity (3) is arranged in the shell (1), at least one heat exchange core (2) with a plate-fin structure is arranged in the cavity (3), the heat exchange core (2) comprises a cold side fluid inlet (21) and a cold side fluid outlet (22), one side of the shell (1) is provided with a hot side fluid inlet (11), the other side of the shell (1) is provided with a hot side fluid outlet (12), one end of the heat exchange core (2) is provided with a connecting part (23), the other opposite end of the heat exchange core is provided with a convex part (24), the inner wall of the shell (1) is provided with a supporting part (13), the supporting part (13) is supported below the convex part (24), the connecting part (23) is positioned outside the shell (1) and is detachably connected with the shell (1), when the connecting part (23) is separated from the shell (1), the heat exchange core (2) can be drawn out of the cavity (3) through the connecting part (23), the cold-side fluid inlet (21) and the cold-side fluid outlet (22) each extend onto the connection (23).

2. The heat exchanger of claim 1, wherein: the connecting part (23) is a flange part, and the flange part is connected with the shell (1) through a fastening piece.

3. The heat exchanger of claim 2, wherein: the heat exchange core (2) is of a cuboid structure, and the flange part is of a rectangular structure.

4. The heat exchanger of claim 1, wherein: the supporting part (13) is of a right-angled triangle structure, and two right-angled sides respectively correspond to the shell (1) and the convex part (24).

5. The heat exchanger of claim 1 or 2 or 3 or 4, wherein: two or more heat exchange cores (2) are arranged.

6. The heat exchanger of claim 5, wherein: the shell (1) is of a cuboid structure, and the heat exchange cores (2) are arranged along the long edge direction of the shell (1).

7. The heat exchanger of claim 6, wherein: the side of each heat exchange core (2) provided with the cold-side fluid inlet (21) and the cold-side fluid outlet (22) is positioned on the same side of the shell (1).

8. The heat exchanger of claim 6, wherein: one side of each heat exchange core (2) provided with a cold-side fluid inlet (21) and a cold-side fluid outlet (22) is respectively positioned at two opposite sides of the shell (1).

9. The heat exchanger of claim 1 or 2 or 3 or 4, wherein: the hot side fluid outlet (12) is arranged at the bottom of the shell (1), and the height of the hot side fluid inlet (11) is larger than that of the hot side fluid outlet (12).

10. The heat exchanger of claim 1 or 2 or 3 or 4, wherein: the number of the hot side fluid inlets (11) is two, each heat exchange core (2) is located between the two hot side fluid inlets (11), and the hot side fluid outlet (12) is located between the two hot side fluid inlets (11).

11. The heat exchanger of claim 1 or 2 or 3 or 4, wherein: the hot side fluid inlets (11) are provided with a plurality of hot side fluid inlets and are arranged around the heat exchange cores (2), and the hot side fluid outlets (12) are positioned at the centers of the plurality of hot side fluid inlets (11).