CN111947490A - Liquid distribution structure with shielding prevention effect and heat exchanger - Google Patents

Abstract

The invention provides a liquid distribution structure and a heat exchanger with the effect of avoiding shielding. The liquid distribution structure includes: a liquid distribution pipe; a heat exchange pipe is arranged in the heat exchanger, and the liquid distribution pipe is arranged above the heat exchange pipe in a ring shape. The liquid distribution structure and heat exchanger provided by the present invention have the effect of avoiding shielding, and the liquid distribution pan structure in the prior art is replaced by a ring-shaped liquid distribution pipe, so as to ensure the same liquid distribution effect as the liquid distribution pan structure. Under the circumstance, the shielding of the gaseous refrigerant is reduced, so as to ensure the heat exchange performance of the heat exchanger. At the same time, the distribution area of the heat exchange tubes can be increased by setting the injection holes, which effectively overcomes the existence of the small distribution area of the heat exchange tubes in the prior art. The problem of multiple heat exchange dead zones reduces the shielding of the heat exchange tubes by the liquid distributor, reduces the restrictions on the layout of the heat exchange tubes by the liquid distributor, and simplifies the structure of the liquid distributor, so that it occupies a small space, and the liquid distribution has no dead ends. There is no dead space in the heat, which improves the space utilization of the heat exchanger.

Description

Liquid distribution structure and heat exchanger with the effect of avoiding shading

technical field

The invention relates to the technical field of air treatment equipment, in particular to a liquid distribution structure and a heat exchanger with the effect of avoiding shielding.

Background technique

In the heat pump system unit, the falling film evaporator needs to have the function of taking into account the dual working conditions of evaporation and condensation. The conventional liquid distributor structure is a whole rectangular or other form of box form, which can only meet the distribution of evaporation conditions. Liquid effect and fluid flow mode, in the condensing condition, the gaseous refrigerant with high temperature and high pressure enters the top of the shell through the outlet of the original evaporation condition, and the intermediate liquid distributor blocks most of the heat exchange area, and the gaseous refrigerant cannot fully Contact with the heat exchange tubes, resulting in poor heat exchange of some of the heat exchange tubes, resulting in a low utilization rate of the heat exchange area, and the layout of the heat exchange tubes is only arranged in the middle area of the shell, and there is no heat exchange tube layout on both sides of the liquid distributor. When it is converted to condensing condition, there are many dead zones of heat exchange, so that although the gaseous refrigerant fills the whole shell side, the area in contact with the heat exchange tube is reduced, so that the utilization rate of the whole space is very low.

SUMMARY OF THE INVENTION

In order to solve the technical problem of low heat exchange efficiency of the heat exchanger caused by the liquid distributor in the heat exchanger hindering the entry of gaseous refrigerant in the prior art, a liquid distribution pipe is provided in a ring shape to avoid blocking the gaseous refrigerant. The liquid distribution structure and heat exchanger have the effect of avoiding shading.

A liquid distribution structure is applied to a heat exchanger, and the liquid distribution structure includes:

a liquid distribution pipe, the liquid distribution pipe is arranged in the heat exchanger, and the liquid distribution pipe is provided with a spray hole;

The heat exchanger is provided with a heat exchange tube, the liquid distribution tube is arranged above the heat exchange tube in a ring shape, and the spraying direction of the spray hole is towards the heat exchange tube and/or towards the heat exchange tube above the heat pipe.

The heat exchanger is provided with a liquid inlet, and the liquid inlet communicates with the liquid distribution pipe.

The liquid distribution pipe is surrounded by a rectangular frame, the bottom surface of the rectangular frame faces the heat exchange tube, and the injection holes are located on the inner surface, the bottom surface or the outer surface of the rectangular frame.

The liquid distribution structure further includes at least one communication pipeline, the communication pipeline is arranged inside the annular shape, and both ends of the communication pipeline are communicated with the liquid distribution pipe.

The number of the communication pipelines is at least two, and all the communication pipelines are arranged side by side in the annular interior; or the number of the communication pipelines is at least two, and all the communication pipelines are arranged crosswise in the Inside the ring, the communicating pipes that cross each other communicate with each other.

The communication pipeline is provided with injection holes.

In the direction away from the heat exchange tube, the injection holes are distributed on the liquid distribution pipe in at least one triangle; or in the direction away from the heat exchange tube, the injection holes are distributed in the liquid distribution in a rectangular shape. On the tube; or along the direction away from the heat exchange tube, the flow area of the spray hole gradually decreases.

The cross-section of the liquid distribution pipe is a trapezoid, and the bottom angle of the trapezoid is in the range of 0° to 90°; or the cross-section of the liquid distribution pipe is a triangle, and the angle of the top angle of the triangle is in the range of 0° to 180°. °; or the cross section of the liquid distribution pipe is circular.

The cross section of the liquid distribution pipe is a rectangle, one side of the rectangle is recessed toward the inside of the rectangle to form a bending structure, and the bending structure is provided with an injection hole.

The bending structure includes a first plane and a second plane that are connected to each other, and there is an included angle between the first plane and the second plane.

The first plane is provided with injection holes; or the second plane is provided with injection holes; or both the first plane and the second plane are provided with injection holes.

The angle range of the included angle is 0°-180°.

A heat exchanger includes the above-mentioned liquid distribution structure.

The heat exchanger further includes an air-distribution plate, the heat exchanger is provided with a ventilation hole, and the air-distribution plate is arranged between the liquid distribution structure and the ventilation hole.

The liquid distribution structure and heat exchanger provided by the present invention have the effect of avoiding shielding, and the liquid distribution pan structure in the prior art is replaced by a ring-shaped liquid distribution pipe, so as to ensure the same liquid distribution effect as the liquid distribution pan structure. Under the circumstance, the shielding of the gaseous refrigerant is reduced, so as to ensure the heat exchange performance of the heat exchanger. At the same time, the distribution area of the heat exchange tubes can be increased by setting the injection holes, which effectively overcomes the existence of the small distribution area of the heat exchange tubes in the prior art. The problem of multiple heat exchange dead zones reduces the shielding of the heat exchange tubes by the liquid distributor, reduces the restrictions on the layout of the heat exchange tubes by the liquid distributor, and simplifies the structure of the liquid distributor, so that it occupies a small space, and the liquid distribution has no dead ends. There is no dead space in the heat, which improves the space utilization of the heat exchanger.

Description of drawings

FIG. 1 is a schematic side cross-sectional view of a heat exchanger according to an embodiment of a liquid distribution structure and a heat exchanger that avoids the blocking effect provided by the present invention;

2 is a schematic structural diagram of the liquid distribution structure of the embodiment of the liquid distribution structure and the heat exchanger with the avoidance of shading effect provided by the present invention;

3 is a perspective view of a heat exchanger according to an embodiment of a liquid distribution structure and a heat exchanger that avoids shading effects provided by the present invention;

4 is a schematic structural diagram of a liquid distribution pipe having a K-shaped cross-section according to an embodiment of the liquid distribution structure and heat exchanger provided by the present invention;

5 is a schematic structural diagram of a liquid distribution pipe provided with a communication pipeline in an embodiment of a liquid distribution structure and a heat exchanger with a shielding effect provided by the present invention;

In the picture:

1. Heat exchanger; 2. Liquid distribution pipe; 21. Injection hole; 3. Heat exchange pipe; 11. Liquid inlet; 4. Connecting pipeline.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

The liquid distribution structure shown in Figures 1 to 5 is applied to a heat exchanger 1, especially a shell-and-tube heat exchanger 1. The liquid distribution structure includes:

The liquid distribution pipe 2 for distributing the liquid refrigerant to the interior of the heat exchanger 1, the liquid distribution pipe 2 is arranged in the heat exchanger 1, and the liquid distribution pipe 2 is provided with a spray hole 21, and the liquid refrigerant After entering the liquid distribution pipe 2, it is sprayed into the heat exchanger 1 through the spray hole 21;

The heat exchanger 1 is provided with a heat exchange tube 3, and the liquid distribution tube 2 is arranged above the heat exchange tube 3 in an annular shape. The size of the liquid distribution pan structure in the prior art is the same to ensure the same liquid distribution area, and the spraying direction of the spray hole 21 is toward the heat exchange tube 3 and/or toward the top of the heat exchange tube 3, so that the spray hole The liquid refrigerant sprayed from 21 can directly contact the heat exchange tube 3 to ensure the heat exchange efficiency of the liquid refrigerant.

The heat exchanger 1 is provided with a liquid inlet 11 , the liquid inlet 11 is communicated with the liquid distribution pipe 2 , and the liquid refrigerant directly enters the liquid distribution pipe 2 through the liquid inlet 11 .

The liquid distribution pipe 2 is surrounded by a rectangular frame, the bottom surface of the rectangular frame faces the heat exchange pipe 3, and the injection holes 21 are located on the inner surface, bottom surface or outer surface of the rectangular frame, that is, the liquid distribution The pipe 2 is arranged in a rectangular manner, which is the same as the edge position of the rectangular liquid distribution tray of the liquid distribution tray structure in the prior art, and the spraying direction of the liquid refrigerant is controlled according to the setting of the injection holes 21 on different sides, so as to achieve uniform liquid distribution. Purpose.

The liquid distribution structure also includes at least one communication pipeline 4, the communication pipeline 4 is arranged inside the ring, and both ends of the communication pipeline 4 are communicated with the liquid distribution pipe 2. The pipeline 4 connects two different positions of the liquid distribution pipe 2 to increase the flow area of the liquid refrigerant, so that the liquid refrigerant can quickly reach any position of the liquid distribution pipe 2, thereby increasing the liquid distribution of the liquid distribution pipe 2. Effect.

The number of the communication pipelines 4 is at least two, and all the communication pipelines 4 are arranged in the annular interior side by side; or the number of the communication pipelines 4 is at least two, and all the communication pipelines 4 intersect The communication pipelines 4 that are arranged inside the ring and intersect with each other communicate with each other, and the specific number and arrangement of the communication pipelines 4 are set according to actual requirements.

The communication pipeline 4 is provided with spray holes 21 , and the number of the spray holes 21 is increased as much as possible, thereby increasing the liquid distribution effect of the liquid distribution pipe 2 .

In the direction away from the heat exchange tube 3 , the injection holes 21 are distributed on the liquid distribution pipe 2 in at least one triangle; or in the direction away from the heat exchange tube 3 , the injection holes 21 are distributed in a rectangular shape On the liquid distribution pipe 2; or along the direction away from the heat exchange pipe 3, the flow area of the spray holes 21 gradually decreases, and the above methods can ensure that all the spray holes 21 can achieve the purpose of uniform liquid distribution .

The cross-section of the liquid distribution pipe 2 is a trapezoid, and the bottom angle of the trapezoid is in the range of 0° to 90°; or the cross-section of the liquid distribution pipe 2 is a triangle, and the angle range of the top angle of the triangle is 0° to 180°; or the cross section of the liquid distribution pipe 2 is circular.

The cross section of the liquid distribution pipe 2 is rectangular, and one side of the rectangle is recessed toward the inside of the rectangle to form a bending structure. The cross section is K-shaped, and the spray holes 21 are provided on both inclined surfaces of the K-shape to increase the direction of spraying, thereby increasing the liquid distribution effect.

The bending structure includes a first plane and a second plane that are connected to each other, an included angle is formed between the first plane and the second plane, and the first plane and the second plane form two inclined planes of the K-shape.

The first plane is provided with injection holes 21 ; or the second plane is provided with injection holes 21 ; or both the first plane and the second plane are provided with injection holes 21 .

The angle range of the included angle is 0°-180°.

The number of injection holes 21 is determined by calculating the flow rate according to the amount of refrigerant injected, and the preferred range is 1-10 m/s.

A heat exchanger 1 includes the above-mentioned liquid distribution structure.

The heat exchanger 1 further includes an air homogeneous plate, and the heat exchanger 1 is provided with a ventilation hole. The air homogeneous plate is arranged between the liquid distribution structure and the ventilation hole. Heater 1 avoids the problem that the vaporized gaseous refrigerant is liquid-entrained during the evaporation process.

The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as limiting the scope of the patent of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several modifications and improvements can be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims (14)

1. A cloth liquid structure which characterized in that: applied to a heat exchanger (1), the liquid distribution structure comprises:

the liquid distribution pipe (2) is arranged in the heat exchanger (1), and a spray hole (21) is formed in the liquid distribution pipe (2);

be provided with heat exchange tube (3) in heat exchanger (1), liquid distribution pipe (2) be the annular set up in the top of heat exchange tube (3), just the injection direction orientation of jet orifice (21) heat exchange tube (3) and/or orientation the top of heat exchange tube (3).

2. The liquid distribution structure according to claim 1, characterized in that: the heat exchanger (1) is provided with a liquid inlet (11), and the liquid inlet (11) is communicated with the liquid distribution pipe (2).

3. The liquid distribution structure according to claim 2, characterized in that: the liquid distribution pipe (2) is enclosed to form a rectangular frame, the bottom surface of the rectangular frame faces the heat exchange pipe (3), and the jet holes (21) are formed in the inner surface, the bottom surface or the outer surface of the rectangular frame.

4. The liquid distribution structure according to claim 1, characterized in that: the liquid distribution structure further comprises at least one communication pipeline (4), the communication pipeline (4) is arranged in the annular part, and two ends of the communication pipeline (4) are communicated with the liquid distribution pipe (2).

5. The liquid distribution structure according to claim 4, characterized in that: the number of the communication pipelines (4) is at least two, and all the communication pipelines (4) are arranged in the annular interior in parallel; or the number of the communication pipelines (4) is at least two, all the communication pipelines (4) are arranged in the annular interior in a crossed mode, and the communication pipelines (4) which are mutually crossed are mutually communicated.

6. The liquid distribution structure according to claim 4, characterized in that: and the communication pipeline (4) is provided with a jet hole (21).

7. The liquid distribution structure according to claim 1, characterized in that: the jet holes (21) are distributed on the liquid distribution pipe (2) in at least one triangle along the direction far away from the heat exchange pipe (3); or along the direction far away from the heat exchange tube (3), the jet holes (21) are distributed on the liquid distribution tube (2) in a rectangular shape; or along the direction far away from the heat exchange tube (3), the flow area of the jet hole (21) is gradually reduced.

8. The liquid distribution structure according to claim 1, characterized in that: the section of the liquid distribution pipe (2) is trapezoidal, and the bottom angle of the trapezoid ranges from 0 degree to 90 degrees; or the cross section of the liquid distribution pipe (2) is triangular, and the angle range of the vertex angle of the triangle is 0-180 degrees; or the section of the liquid distribution pipe (2) is circular.

9. The liquid distribution structure according to claim 1, characterized in that: the cross section of the liquid distribution pipe (2) is rectangular, one side face of the rectangle is sunken towards the inside of the rectangle to form a bending structure, and the bending structure is provided with a jet hole (21).

10. The liquid distribution structure according to claim 9, characterized in that: the bending structure comprises a first plane and a second plane which are connected with each other, and an included angle is formed between the first plane and the second plane.

11. The liquid distribution structure according to claim 10, characterized in that: the first plane is provided with an injection hole (21); or the second plane is provided with an injection hole (21); or the first plane and the second plane are both provided with injection holes (21).

12. The liquid distribution structure according to claim 10, characterized in that: the angle range of the included angle is 0-180 degrees.

13. A heat exchanger, characterized by: comprising the liquid distribution structure of any one of claims 1 to 12.

14. The heat exchanger of claim 13, wherein: the heat exchanger (1) further comprises an air equalization plate, vent holes are formed in the heat exchanger (1), and the air equalization plate is arranged between the liquid distribution structure and the vent holes.

Images