CN212390654U - Heat exchanger - Google Patents

Abstract

The utility model provides a heat exchanger, which comprises a shell, a heat exchange tube group, a sealing cover and a liquid separating structure, wherein the heat exchange tube group is arranged in the shell and comprises a plurality of heat exchange tubes; the sealing cover is arranged on one side of the shell; the liquid separating structure is arranged inside the sealing cover, one side of the liquid separating structure is provided with a refrigerant inlet, and the other side of the liquid separating structure is matched with the heat exchange tube set so as to divide liquid entering from the refrigerant inlet into a plurality of heat exchange tubes of the heat exchange tube set. Adopt this scheme, the accessible divides liquid structure to be shunted to a plurality of heat exchange tubes of heat exchange tube group from the liquid that the refrigerant import got into in to make in the refrigerant relatively shunts a plurality of heat exchange tubes evenly, moreover, will divide liquid structure to set up inside the closing cap, need not to set up the knockout alone again, can simplify the structure of heat exchanger like this, be convenient for make, thereby can reduce the cost of heat exchanger.

Description

Heat exchanger

Technical Field

The utility model relates to a heat exchanger technical field particularly, relates to a heat exchanger.

Background

The dry evaporator is one of the main evaporator types of an air-cooled cold water/heat pump unit and belongs to a shell-and-tube heat exchanger. In the design of the heat exchanger, refrigerant passes through a tube side, and water passes through a shell side; often structurally including components such as covers, housings, heat exchanger bundles, etc.

When the dry-type evaporator is applied as an evaporator, the liquid separation condition of an inlet of a heat exchange tube bundle of the dry-type evaporator has large influence on the performance of the heat exchanger and the stability of the operation of a unit. Because the tube bank is many, the heat exchange tube import distributes and often can't accomplish the rule in structure and arrange, causes the degree of difficulty that each heat exchange tube import divides liquid. In order to solve the problem of even liquid separation, an independent liquid separator is specially arranged in some heat exchangers for liquid separation, but the liquid separator is complex in structure and inconvenient to process, and the cost of the heat exchanger is increased.

SUMMERY OF THE UTILITY MODEL

The utility model provides a heat exchanger to satisfy the branch liquid demand of heat exchanger and reduce manufacturing cost.

In order to achieve the above object, the utility model provides a heat exchanger, include: a housing; the heat exchange tube group is arranged in the shell and comprises a plurality of heat exchange tubes; a cover disposed at one side of the housing; the liquid separating structure is arranged inside the sealing cover, a refrigerant inlet is formed in one side of the liquid separating structure, and the other side of the liquid separating structure is matched with the heat exchange tube set so as to divide liquid entering from the refrigerant inlet into a plurality of heat exchange tubes of the heat exchange tube set.

Furthermore, divide the liquid structure including dividing the liquid chamber and a plurality of reposition of redundant personnel passageway, divide the opening of liquid chamber one side to form the refrigerant import, it is a plurality of the reposition of redundant personnel passageway all with divide the opposite side intercommunication of liquid chamber, it is a plurality of the reposition of redundant personnel passageway with a plurality of heat exchange tubes of heat exchange tube group correspond.

Further, it is a plurality of the reposition of redundant personnel passageway sets up around predetermineeing the central line, the reposition of redundant personnel passageway be close to the one end of branch sap cavity with the distance of predetermineeing the central line is A, keeping away from of reposition of redundant personnel passageway the one end of branch sap cavity with the distance of predetermineeing the central line is B, A < B.

Furthermore, the liquid separating structure further comprises a conical head arranged in the liquid separating cavity, the tip of the conical head faces the refrigerant inlet, and the plurality of flow dividing channels are arranged around the conical head.

Further, the heat exchanger further comprises: the communication cavity is positioned between the sealing cover and the heat exchange tube group, and the plurality of flow dividing channels and the plurality of heat exchange tubes are communicated through the communication cavity; a plurality of partitions muscle, it is a plurality of the partition muscle will the intercommunication chamber is divided into a plurality of subcavities, one side and a plurality of in the subcavity some reposition of redundant personnel passageway correspond in the reposition of redundant personnel passageway, the opposite side and a plurality of in the subcavity the inlet end of some heat exchange tubes in the heat exchange tube corresponds.

Further, the heat exchanger further comprises: the tube plate is connected with one end of the shell, and one ends of the heat exchange tubes are fixed on the tube plate; one side of the separating ring is hermetically connected with the sealing cover, the other side of the separating ring is hermetically connected with the tube plate, the communicating cavity is located in the separating ring, and the separating ribs are arranged on the separating ring.

Furthermore, the sealing cover is internally provided with a return air outlet which is arranged at an interval with the liquid separating structure, the separating ring is internally provided with a return air outlet cavity which is arranged at an interval with the communicating cavity, one side of the return air outlet cavity is communicated with the return air outlet, and the other side of the return air outlet cavity is communicated with the liquid outlet ends of the heat exchange tubes.

Furthermore, the liquid separating structure comprises a liquid separating cavity which is in a round table shape, the end, with a small opening, of the liquid separating cavity forms the refrigerant inlet, and the end, with a large opening, of the liquid separating cavity faces the heat exchange tube set.

Further, the heat exchanger further comprises: and one end of each liquid distribution pipe is communicated with the heat exchange pipes of the heat exchange pipe group in a one-to-one correspondence manner, and the other end of each liquid distribution pipe is communicated with the liquid distribution cavity.

Furthermore, divide the liquid structure still including setting up in divide the liquid intracavity conical head, the pointed end of conical head is towards the refrigerant import, a plurality of divide the liquid pipe around the conical head sets up.

Further, the heat exchanger further comprises: the liquid inlet pipe is communicated with the refrigerant inlet; the orifice plate sets up the orientation of feed liquor pipe the one end of conical head, the diameter of the through-hole of orifice plate is less than the internal diameter of feed liquor pipe, the through-hole orientation the conical head.

Further, the diameter of branch liquid pipe is less than the diameter of heat exchange tube, the heat exchanger still includes: the tube plate is connected with one end of the shell, and each liquid distribution tube is in expanded connection with the tube plate.

The technical scheme of the utility model is applied, a heat exchanger is provided, the heat exchanger comprises a shell, a heat exchange tube group, a sealing cover and a liquid separating structure, wherein the heat exchange tube group is arranged in the shell, and the heat exchange tube group comprises a plurality of heat exchange tubes; the sealing cover is arranged on one side of the shell; the liquid separating structure is arranged inside the sealing cover, one side of the liquid separating structure is provided with a refrigerant inlet, and the other side of the liquid separating structure is matched with the heat exchange tube set so as to divide liquid entering from the refrigerant inlet into a plurality of heat exchange tubes of the heat exchange tube set. Adopt this scheme, the accessible divides liquid structure to be shunted to a plurality of heat exchange tubes of heat exchange tube group from the liquid that the refrigerant import got into in to make in the refrigerant relatively shunts a plurality of heat exchange tubes evenly, moreover, will divide liquid structure to set up inside the closing cap, need not to set up the knockout alone again, can simplify the structure of heat exchanger like this, be convenient for make, thereby can reduce the cost of heat exchanger.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structural diagram of a heat exchanger according to an embodiment of the present invention;

FIG. 2 shows a schematic view of the closure and dispensing structure of FIG. 1;

FIG. 3 shows a cross-sectional view of the closure and dispensing structure of FIG. 2;

FIG. 4 shows a schematic view of the spacer bar and the liquid separating structure of FIG. 1;

fig. 5 shows a schematic structural diagram of a heat exchanger provided in the second embodiment of the present invention;

FIG. 6 shows a partial enlarged view of FIG. 5;

FIG. 7 shows a schematic view of the closure of FIG. 5;

FIG. 8 shows a schematic layout of the heat exchange tubes of FIG. 5;

fig. 9 shows a schematic partial structural diagram of a heat exchanger according to a third embodiment of the present invention.

Wherein the figures include the following reference numerals:

10. a housing; 20. a heat exchange pipe; 30. sealing the cover; 31. a return air outlet; 40. a liquid separating structure; 41. a liquid separation cavity; 42. a flow dividing channel; 43. a conical head; 51. a communicating cavity; 52. a sub-cavity; 53. a return air outlet cavity; 61. separating ribs; 62. a spacer ring; 70. a tube sheet; 80. a liquid separating pipe; 91. a liquid inlet pipe; 92. an orifice plate.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in the accompanying drawings, the utility model provides a heat exchanger, include: a housing 10; the heat exchange tube group is arranged in the shell 10 and comprises a plurality of heat exchange tubes 20; a cover 30, the cover 30 being disposed at one side of the case 10; the liquid separating structure 40 is arranged inside the sealing cover 30, one side of the liquid separating structure 40 is provided with a refrigerant inlet, and the other side of the liquid separating structure 40 is matched with the heat exchange tube set so as to separate liquid entering from the refrigerant inlet into the plurality of heat exchange tubes 20 of the heat exchange tube set.

Adopt this scheme, accessible divides liquid structure 40 to be shunted to a plurality of heat exchange tubes 20 of heat exchange tube group from the liquid that the refrigerant import got into in to make the refrigerant relatively evenly shunt to a plurality of heat exchange tubes 20 in, moreover, will divide liquid structure 40 to set up inside closing cap 30, need not to set up the knockout alone again, can simplify the structure of heat exchanger like this, be convenient for make, thereby can reduce the cost of heat exchanger. And, this has practiced thrift cavity space, and this structure uses concentrated minute liquid and capillary action, and once distribution is comparatively even. In this embodiment, the liquid dividing structure 40 and the heat exchange tube sets may be provided in plural, and the plural heat exchange tube sets and the plural liquid dividing structures 40 are provided in one-to-one correspondence.

In the first embodiment, the liquid dividing structure 40 includes a liquid dividing cavity 41 and a plurality of flow dividing channels 42, an opening on one side of the liquid dividing cavity 41 forms a refrigerant inlet, the plurality of flow dividing channels 42 are all communicated with the other side of the liquid dividing cavity 41, and the plurality of flow dividing channels 42 correspond to the plurality of heat exchange tubes 20 of the heat exchange tube set. Thus, the refrigerant entering the liquid dividing cavity 41 from other structures can be divided into a plurality of small liquid flows through the plurality of dividing channels 42, and then the plurality of small liquid flows flow into the plurality of heat exchange tubes 20 in the heat exchange tube set, so that the refrigerant can be uniformly dispersed into the plurality of heat exchange tubes 20, and the heat exchange effect is improved. In particular, the heat exchanger is a dry evaporator.

In this embodiment, the plurality of flow dividing channels 42 are disposed around the preset central line, a distance between one end of the flow dividing channel 42 close to the liquid dividing chamber 41 and the preset central line is a, a distance between one end of the flow dividing channel 42 far from the liquid dividing chamber 41 and the preset central line is B, and a < B. Thus, the plurality of flow distribution channels 42 are distributed in a conical shape, which is beneficial to dispersing concentrated refrigerants to a larger space and realizing uniform flow distribution.

In this embodiment, the liquid separating structure 40 further includes a conical head 43 disposed in the liquid separating chamber 41, a tip of the conical head 43 faces the refrigerant inlet, and a plurality of flow dividing channels 42 are disposed around the conical head 43. The refrigerant flowing into the liquid distribution cavity 41 can be scattered along the conical surface of the conical head 43 after contacting the conical head 43, so that the refrigerant can be uniformly distributed into the plurality of distribution channels 42, and the distribution effect is improved. Optionally, the conical head 43 and the closure 30 are of unitary construction, which facilitates manufacture.

In this embodiment, the heat exchanger further comprises: the communication cavity 51, the communication cavity 51 locates between capping 30 and heat exchange tube bank, the multiple diversion channels 42 and multiple heat exchange tubes 20 are communicated through the communication cavity 51; the communicating cavity 51 is divided into a plurality of sub-cavities 52 by the plurality of separating ribs 61 and the plurality of separating ribs 61, one side of each sub-cavity 52 corresponds to one part of the flow dividing channels 42 in the plurality of flow dividing channels 42, and the other side of each sub-cavity 52 corresponds to the liquid inlet end of one part of the heat exchange tubes 20 in the plurality of heat exchange tubes 20. Like this a plurality of partition muscle 61 divide into a plurality of subchambers 52 with the communicating chamber 51, and the refrigerant of following all reposition of redundant personnel passageways 42 output can not flow to same subchamber 52 in, but disperses in different subchambers 52, then the refrigerant reentrants with the subchamber 52 correspond in the heat exchange tube 20. Thus, the gravity influence of vertical liquid separation is eliminated, two-phase separation caused by vortex and centrifugal action of the refrigerant in the distribution process is prevented, and the refrigerant uniformly enters each heat exchange tube 20. The refrigerant in the present embodiment may also be understood as a refrigerant.

Optionally, the partition rib 61 comprises a vertical rib and a plurality of horizontal ribs, the plurality of horizontal ribs are distributed in the vertical direction, each horizontal rib is connected with the vertical rib, and the region between the two horizontal ribs is a sub-cavity.

In this embodiment, the heat exchanger further comprises: a tube plate 70, the tube plate 70 being connected to one end of the shell 10, one end of each of the plurality of heat exchange tubes 20 being fixed to the tube plate 70; the seal cover 30 is hermetically connected with one side of the separating ring 62, the tube plate 70 is hermetically connected with the other side of the separating ring 62, the communicating cavity 51 is positioned in the separating ring 62, and the plurality of separating ribs 61 are arranged on the separating ring 62. The plurality of sub-chambers 52 are formed by the cooperation of the partition ring 62 and the plurality of partition ribs 61 to guide the flow of the refrigerant.

Furthermore, a return air outlet 31 is arranged in the sealing cover 30 at a distance from the liquid separating structure 40, a return air outlet cavity 53 is arranged in the separating ring 62 at a distance from the communicating cavity 51, one side of the return air outlet cavity 53 is communicated with the return air outlet 31, and the other side of the return air outlet cavity 53 is communicated with the liquid outlet ends of the plurality of heat exchange tubes 20. Therefore, the heat-exchanged refrigerant can be conveniently output to the heat exchanger.

In the second embodiment, the liquid separating structure 40 includes a liquid separating cavity 41, the liquid separating cavity 41 is in a circular truncated cone shape, a refrigerant inlet is formed at one end of the liquid separating cavity 41 with a small opening, and one end of the liquid separating cavity 41 with a large opening faces the heat exchange tube set. The flow process of two-phase fluid from a small section to a large section is facilitated, refrigerant dispersion is facilitated, and the liquid separation effect is improved.

In this embodiment, the heat exchanger further comprises: a plurality of liquid distribution pipes 80, the one end of a plurality of liquid distribution pipes 80 and a plurality of heat exchange tubes 20 one-to-one intercommunication of heat exchange tube group, the other end of a plurality of liquid distribution pipes 80 all communicates with liquid distribution chamber 41. The refrigerants in the liquid separating cavity 41 can be dispersed through the liquid separating pipes 80, so that the refrigerants can enter the heat exchange pipes 20 through the liquid separating pipes 80, and the liquid separating purpose is achieved.

In this embodiment, the liquid separating structure 40 further includes a conical head 43 disposed in the liquid separating chamber 41, a tip of the conical head 43 faces the refrigerant inlet, and a plurality of liquid separating pipes 80 are disposed around the conical head 43. The refrigerant flowing into the liquid distribution cavity 41 can be scattered along the conical surface of the conical head 43 after contacting the conical head 43, so that the refrigerant can be uniformly distributed into the plurality of liquid distribution pipes 80, and the distribution effect is improved.

In this embodiment, the diameter of the liquid separating pipe 80 is smaller than that of the heat exchanging pipe 20, and the heat exchanger further includes: the tube plate 70 is connected with one end of the shell 10, and each liquid distributing tube 80 is expanded with the tube plate 70. Adopt the reducible welding point of the mode of expanded joint, reduce the processing degree of difficulty. The liquid separating pipe 80 has a diameter smaller than that of the heat exchange pipe 20, and is easily bent.

In the third embodiment, different from the above embodiments, the heat exchanger further includes: the liquid inlet pipe 91, the liquid inlet pipe 91 is communicated with the refrigerant inlet; and the orifice plate 92 is arranged at one end of the liquid inlet pipe 91 facing the conical head 43, the diameter of a through hole of the orifice plate 92 is smaller than the inner diameter of the liquid inlet pipe 91, and the through hole faces the conical head 43. By adopting the scheme, the flow speed of the refrigerant entering from the liquid inlet pipe 91 can be improved when the refrigerant passes through the through hole with smaller size, and then the refrigerant impacts the conical surface of the conical head 43, so that the refrigerant is more favorably dispersed, and the flow distribution effect is improved.

The main idea of the scheme is that under the condition of the design structure of the conventional dry evaporator, a sealing cover, a tube plate and a liquid separating tube are utilized to create a liquid separating flow channel structure similar to the conventional resistance type liquid separator and the Venturi type liquid separator near a refrigerant inlet, so that good refrigerant liquid separation is formed. The liquid separation design is simpler than that of an orifice plate, and the performance is easy to achieve; the number of welding points is greatly reduced compared with the number of welding points adopting a liquid separator; because most of liquid distributors on the market are made of copper, the scheme reduces the use of partial copper materials compared with a liquid distributor type, and the cost is lower.

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

Claims (12)

1. A heat exchanger, comprising:

a housing (10);

a heat exchange tube set disposed within the housing (10), the heat exchange tube set including a plurality of heat exchange tubes (20);

a cover (30), the cover (30) being disposed on one side of the housing (10);

the liquid separating structure (40) is arranged inside the sealing cover (30), one side of the liquid separating structure (40) is provided with a refrigerant inlet, and the other side of the liquid separating structure (40) is matched with the heat exchange tube set so as to separate liquid entering from the refrigerant inlet into a plurality of heat exchange tubes (20) of the heat exchange tube set.

2. The heat exchanger according to claim 1, wherein the liquid dividing structure (40) comprises a liquid dividing cavity (41) and a plurality of flow dividing channels (42), an opening at one side of the liquid dividing cavity (41) forms the refrigerant inlet, the plurality of flow dividing channels (42) are communicated with the other side of the liquid dividing cavity (41), and the plurality of flow dividing channels (42) correspond to the plurality of heat exchange tubes (20) of the heat exchange tube set.

3. The heat exchanger according to claim 2, wherein a plurality of the branch passages (42) are arranged around a preset center line, wherein the end of the branch passage (42) close to the liquid distribution chamber (41) is at a distance A from the preset center line, and the end of the branch passage (42) far from the liquid distribution chamber (41) is at a distance B from the preset center line, A < B.

4. The heat exchanger according to claim 2, wherein the liquid dividing structure (40) further comprises a conical head (43) disposed in the liquid dividing chamber (41), a tip of the conical head (43) faces the refrigerant inlet, and the plurality of flow dividing channels (42) are disposed around the conical head (43).

5. The heat exchanger of claim 2, further comprising:

a communication chamber (51), the communication chamber (51) being located between the cover (30) and the heat exchange tube bank, the plurality of diversion channels (42) and the plurality of heat exchange tubes (20) being in communication through the communication chamber (51);

a plurality of separation muscle (61), it is a plurality of separation muscle (61) will intercommunication chamber (51) are divided into a plurality of subcavities (52), one side and a plurality of subcavities (52) some reposition of redundant personnel passageway (42) in reposition of redundant personnel passageway (42) correspond, the opposite side and a plurality of the feed liquor end of some heat exchange tube (20) in heat exchange tube (20) corresponds.

6. The heat exchanger of claim 5, further comprising:

the tube plate (70), the said tube plate (70) is connected with one end of the said shell (10), one end of the multiple said heat exchange tubes (20) is fixed on said tube plate (70);

the sealing cover comprises a separating ring (62), one side of the separating ring (62) is connected with the sealing cover (30) in a sealing mode, the other side of the separating ring (62) is connected with the tube plate (70) in a sealing mode, the communicating cavity (51) is located in the separating ring (62), and a plurality of separating ribs (61) are arranged on the separating ring (62).

7. The heat exchanger according to claim 6, wherein the cover (30) is provided with a return air outlet (31) spaced from the liquid separating structure (40), the separating ring (62) is provided with a return air outlet chamber (53) spaced from the communicating chamber (51), one side of the return air outlet chamber (53) is communicated with the return air outlet (31), and the other side of the return air outlet chamber (53) is communicated with the liquid outlet ends of the plurality of heat exchange tubes (20).

8. The heat exchanger according to claim 1, wherein the liquid separating structure (40) comprises a liquid separating cavity (41), the liquid separating cavity (41) is in a circular truncated cone shape, one end of the liquid separating cavity (41) with a small opening forms the refrigerant inlet, and one end of the liquid separating cavity (41) with a large opening faces the heat exchange tube set.

9. The heat exchanger of claim 8, further comprising:

one end of each liquid distributing pipe (80) is communicated with the heat exchange pipes (20) of the heat exchange pipe set in a one-to-one correspondence mode, and the other end of each liquid distributing pipe (80) is communicated with the liquid distributing cavity (41).

10. The heat exchanger according to claim 9, wherein the liquid separating structure (40) further comprises a conical head (43) disposed in the liquid separating chamber (41), a tip of the conical head (43) faces the refrigerant inlet, and the plurality of liquid separating pipes (80) are disposed around the conical head (43).

11. The heat exchanger of claim 10, further comprising:

the liquid inlet pipe (91), the liquid inlet pipe (91) is communicated with the refrigerant inlet;

the pore plate (92) is arranged at one end, facing the conical head (43), of the liquid inlet pipe (91), the diameter of a through hole of the pore plate (92) is smaller than the inner diameter of the liquid inlet pipe (91), and the through hole faces the conical head (43).

12. The heat exchanger according to claim 9, wherein the liquid distribution pipe (80) has a diameter smaller than that of the heat exchange pipe (20), the heat exchanger further comprising:

the tube plate (70), the tube plate (70) is connected with one end of the shell (10), and each liquid distribution tube (80) is connected with the tube plate (70) in an expansion mode.

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