CN212274687U

CN212274687U - Heat exchanger

Info

Publication number: CN212274687U
Application number: CN202020357119.5U
Authority: CN
Inventors: 王振宝; 刘睿; 赵希枫; 潘京大
Original assignee: Hisense Shandong Air Conditioning Co Ltd
Current assignee: Hisense Shandong Air Conditioning Co Ltd
Priority date: 2020-03-19
Filing date: 2020-03-19
Publication date: 2021-01-01
Anticipated expiration: 2030-03-19

Abstract

The utility model relates to the technical field of household appliances, and discloses a heat exchanger, which comprises a plurality of heat exchange units, wherein each heat exchange unit comprises a heat exchange tube and fins sleeved on the heat exchange tube, the number of the fins is at least two, and an airflow channel is formed between every two adjacent fins; the fin has a through hole for the heat exchange tube to pass through and a drainage structure which is equal to the through hole in number and corresponds to the through hole in one to one, the drainage structure comprises a drainage convex part protruding towards one side of the fin, the drainage convex part partially surrounds the through hole and extends to the leeward side of the through hole from the windward side of the through hole, and a drainage groove is formed between the drainage convex part and the heat exchange tube passing through the through hole. When the heat exchanger works, after air enters the airflow channel, part of air flowing forwards along the surface of the fin enters the drainage grooves, and the drainage grooves guide the part of air to the leeward side of the heat exchange tube to strengthen air disturbance of the area.

Description

Heat exchanger

Technical Field

The utility model relates to the technical field of household appliances, especially, relate to a heat exchanger.

Background

The tube fin type heat exchanger is widely applied to the air conditioner and refrigerator industries as a compact type heat exchanger, and the purpose of enhancing heat transfer is achieved by additionally arranging fins on a heat exchange tube.

At present, the common fin types applied to the heat exchanger are of a plane type, a corrugated type and the like, the field cooperativity of the fin types is poor, airflow cannot be introduced into the leeward side of the heat exchange tube, and a wake area of low-speed backflow inevitably exists in the area, so that the heat exchange among the heat exchange tube, the fins and the air is blocked, the heat exchange efficiency of the heat exchanger is reduced, and the working performance of products such as an air conditioner, a refrigerator and the like is further influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a heat exchanger that heat transfer ability is strong, and heat exchange efficiency is high, and is difficult for frosting.

In order to achieve the above object, the utility model provides a heat exchanger, a plurality of heat transfer unit thereof, heat transfer unit includes:

a heat exchange pipe;

the heat exchange tube is sleeved with the fins, the number of the fins is at least two, and an airflow channel is formed between every two adjacent fins;

the fin has the confession the through-hole that the heat exchange tube passed, and with the equal and one-to-one drainage structure of through-hole quantity, drainage structure include to the bellied drainage convex part in one side of fin, drainage convex part partially surround the through-hole and follow the windward side of through-hole extends to the leeward side of through-hole, just the drainage convex part with pass this form the drainage groove between the heat exchange tube of through-hole.

Preferably, the drainage structure comprises two drainage convex parts, and the two drainage convex parts are arranged at intervals and are symmetrical about a straight line passing through the center of the through hole and parallel to the air inlet direction.

Preferably, the drainage convex part is in the shape of an arc strip, and the circle center of the drainage convex part is coincided with the circle center of the through hole.

Preferably, the plate edge of the windward side and the plate edge of the leeward side of the fin are both deflected towards one side of the fin to form a stepped structure.

Preferably, the heat exchange unit comprises at least two heat exchange tubes, the fins are provided with the through holes with the number equal to that of the heat exchange tubes, and all the heat exchange tubes penetrate through all the fins simultaneously.

As the preferred scheme, the fin still has the vortex structure, the vortex structure include with the convex protruding direction of drainage convex part is the same vortex convex part, every adjacent two is located to the vortex convex part between the drainage structure.

Preferably, the turbulence convex part is strip-shaped, and two ends of the turbulence convex part extend to two adjacent drainage convex parts of the drainage structure respectively.

As the preferred scheme, the vortex structure includes two vortex convex parts, two vortex convex parts arrange along the air inlet direction front and back.

Preferably, the turbulent flow convex parts are arc-strip-shaped, and the arc openings of the two turbulent flow convex parts are opposite.

Preferably, the heat exchange units are at least two and are arranged along the air inlet direction, and the fins of any two adjacent heat exchange units are staggered with each other.

The utility model provides a heat exchanger, compared with the prior art, its beneficial effect lies in:

when the heat exchanger works, after air enters the airflow channel, part of air flowing forwards along the surface of the fin enters the drainage groove, and the drainage groove guides the part of air to the leeward side of the heat exchange tube to strengthen the air disturbance of the area; meanwhile, the convex drainage convex part can force the air to generate secondary flow vertical to the fins, the flow distance of the air in the airflow channel is increased, and the contact time of the air and the fins is prolonged, so that the heat exchange capacity of the heat exchanger can be further improved. In addition, because the drainage convex part does not form slit or breach on the fin, consequently, the utility model provides a heat exchanger is difficult for appearing the problem of frosting when regard as the condenser.

Drawings

FIG. 1 is a schematic structural diagram of a heat exchange unit according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a fin according to an embodiment of the present invention.

In the figure: 100. a heat exchange unit; 1. a heat exchange pipe; 2. a fin; 21. a through hole; 22. a drainage protrusion; 23. a drainage groove; 24. a turbulating protrusion; 25. a stepped structure; 3. an air flow channel.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, and these terms are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.

As shown in fig. 1 and fig. 2, an embodiment of the present invention provides a heat exchanger, which mainly includes a plurality of heat exchange units 100, each heat exchange unit 100 includes a heat exchange tube 1 and fins 2 sleeved on the heat exchange tube 1, the fins 2 are at least two, and an airflow channel 3 is formed between every two adjacent fins 2; the fin 2 is provided with through holes 21 for the heat exchange tubes 1 to pass through, and drainage structures which are equal in number and in one-to-one correspondence with the through holes 21, each drainage structure comprises a drainage convex portion 22 protruding towards one side of the fin 2, the drainage convex portions 22 partially surround the through holes 21 and extend from the windward side of the through holes 21 to the leeward side of the through holes 21, and a drainage groove 23 is formed between each drainage convex portion 22 and the heat exchange tube 1 passing through the corresponding through hole 21.

When the heat exchanger works, after air enters the airflow channel 3, part of air flowing forwards along the surface of the fin 2 enters the drainage groove 23, and the drainage groove 23 immediately guides the part of air to the leeward side of the heat exchange tube 1 to strengthen air disturbance in the area, so that a wake area of low-speed backflow cannot be formed in the area, the heat exchange effect is strengthened, further, the heat exchange among the heat exchange tube 1, the fin 2 and the air is more sufficient, and the heat exchange efficiency of the heat exchanger is greatly improved; meanwhile, the convex drainage convex part 22 can force the air to generate secondary flow vertical to the fins 2, the flow distance of the air in the airflow channel 3 is increased, the contact time of the air and the fins 2 is prolonged, and the heat exchange capacity of the heat exchanger can be further improved. In addition, because drainage convex part 22 does not form slit or breach on fin 2, consequently, the utility model provides a heat exchanger is difficult for appearing the problem of frosting when being as the condenser.

Optionally, as shown in fig. 2, as a specific embodiment of the heat exchanger provided by the utility model, the drainage structure includes two drainage convex portions 22, and two drainage convex portions 22 are set up and about the centre of a circle through-hole 21 and be on a parallel with the straight line symmetry of air inlet direction at an interval. Based on this, the air that flows through from heat exchange tube 1 both sides is all drawn the leeward side of heat exchange tube 1 by the drainage structure to further strengthen the air disturbance in this region, strengthen the heat transfer effect.

Optionally, as shown in fig. 2, as a specific embodiment of the heat exchanger provided by the present invention, the drainage convex portion 22 is in the shape of an arc, and the center of circle of the drainage convex portion 22 coincides with the center of circle of the through hole 21, so as to reduce the resistance to the air as much as possible and optimize the line type when the air flows.

Optionally, as shown in fig. 2, as the utility model provides a specific implementation of heat exchanger, the flange edge of the windward side of fin 2 and the flange edge of leeward side all deflect to one side of fin 2 and form echelonment structure 25, and this echelonment structure 25 not only can improve the intensity of fin 2, prevents that it from taking place to warp, can also force the air that gets into in airflow channel 3 to produce the turbulent flow, increases the area of contact of air and fin 2, strengthens heat transfer effect. Preferably, in the present embodiment, the deflection direction of the stepped structure 25 is the same as the projection direction of the drainage protrusion 22.

Optionally, as shown in fig. 1, as a specific embodiment of the heat exchanger provided by the present invention, the heat exchange unit 100 includes at least two heat exchange tubes 1 arranged in parallel at equal intervals, correspondingly, the fins 2 have through holes 21 equal to the number of the heat exchange tubes 1, and each heat exchange tube 1 simultaneously passes through all the fins 2. Preferably, in the present embodiment, the heat exchange unit 100 includes at least two heat exchange tubes 1, and each heat exchange tube 1180 ° is bent into two paths.

Optionally, as shown in fig. 2, as a specific embodiment of the heat exchanger provided by the utility model, fin 2 still has the vortex structure, and the vortex structure includes vortex convex part 24 the same with the protruding direction of drainage convex part 22, and vortex convex part 24 is located between every two adjacent drainage structures. On one hand, the turbulence convex part 24 can disturb the air entering the airflow channel 3, further increase the flowing distance of the air in the airflow channel 3, prolong the contact time of the air and the fins 2, and achieve the purpose of fully exchanging heat among the heat exchange tube 1, the fins 2 and the air; on the other hand, the combination of the drainage convex portion 22 and the spoiler convex portion 24 can break the boundary layer of the air flow in the flowing direction of the air, reduce the pressure loss of the air in the flowing process, and increase the contact area of the fin 2 and the air, thereby further improving the heat exchange capability of the heat exchanger. Preferably, in the present embodiment, the spoiler structure includes two spoiler protrusions 24, and the two spoiler protrusions 24 are arranged in the front-rear direction along the air intake direction.

Optionally, as shown in fig. 2, as a specific embodiment of the heat exchanger provided by the present invention, the turbulence protruding portion 24 is a bar shape, and both ends of the turbulence protruding portion extend to the flow guiding protruding portions 22 of the two adjacent flow guiding structures respectively. Preferably, the turbulator protrusions 24 in this embodiment are arc-shaped, and the arc openings of two turbulator protrusions 24 arranged in the front-back direction along the air inlet direction are opposite.

Preferably, the drainage convex portions 22 and the spoiler convex portions 24 in the present embodiment are formed by press, that is, the drainage convex portions 22 and the spoiler convex portions 24 protrude to one side of the fin 2, and at the same time, grooves are formed on the other side surface of the fin 2. So, drainage convex part 22 and vortex convex part 24 can be processed in step, reduce the preparation degree of difficulty of fin 2, improve the production efficiency of heat exchanger.

Optionally, as shown in fig. 1, as a specific embodiment of the heat exchanger provided by the present invention, the fins 2 of each heat exchange unit 100 may be arranged in parallel at equal intervals, and also may be arranged in parallel at unequal intervals according to the distribution of the wind speed of the inlet wind, that is, the fins 2 in the high wind speed are arranged tightly, and the fins 2 in the low wind speed are arranged loosely, so as to reduce the overall resistance of the heat exchanger.

Optionally, as a specific embodiment of the heat exchanger provided by the present invention, a surface of the fin 2 having the drainage protrusion 22 is referred to as a front surface of the fin 2, and a surface of the fin 2 having the groove is referred to as a back surface of the fin 2, and the front surface and the back surface of any adjacent two fins 2 belonging to the same heat exchange unit 100 may be opposite, opposite or opposite. This kind of arrangement form based on fin 2, the utility model provides a heat exchanger has obtained further promotion to the disturbance ability of air, and the heat transfer effect has obtained further enhancement.

Optionally, as the utility model provides a specific implementation of heat exchanger, heat transfer unit 100 establishes to at least two and arranges along the air inlet direction, and fin 2 of two arbitrary adjacent heat transfer units 100 staggers each other, and the disturbance of multiplicable air improves heat exchange efficiency from this.

To sum up, the utility model provides a heat exchanger, it includes a plurality of heat transfer unit 100, and heat transfer unit 100 includes that heat exchange tube 1 and cover locate fin 2 on heat exchange tube 1, and fin 2 has the drainage structure. Compared with the prior art, the heat exchanger strengthens the air disturbance at the leeward side of the heat exchange tube 1, strengthens the heat exchange effect of the area, and has the advantages of strong heat exchange capability, high heat exchange efficiency and the like. Experiments show that compared with the existing heat exchanger adopting the corrugated fins 2, the heat exchange capacity of the heat exchanger is improved by more than 8% under the condition that the pressure drop is basically unchanged.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.

Claims

1. A heat exchanger, characterized in that, includes a plurality of heat transfer units, the heat transfer unit includes:

a heat exchange pipe;

2. The heat exchanger of claim 1, wherein:

the drainage structure comprises two drainage convex parts, wherein the two drainage convex parts are arranged at intervals and are symmetrical about a straight line passing through the circle center of the through hole and parallel to the air inlet direction.

3. The heat exchanger of claim 1, wherein:

the drainage convex part is in a circular arc strip shape, and the circle center of the drainage convex part is coincided with the circle center of the through hole.

4. The heat exchanger of claim 1, wherein:

the plate edges of the windward side and the leeward side of the fins are deflected towards one side of the fins to form a stepped structure.

5. The heat exchanger of claim 1, wherein:

the heat exchange unit comprises at least two heat exchange tubes, the fins are provided with through holes with the number equal to that of the heat exchange tubes, and all the heat exchange tubes penetrate through all the fins simultaneously.

6. The heat exchanger of claim 5, wherein:

the fin still has the vortex structure, the vortex structure include with the same vortex convex part of the protruding direction of drainage convex part, every adjacent two is located to the vortex convex part between the drainage structure.

7. The heat exchanger of claim 6, wherein:

the vortex convex part is the bar, just the both ends of vortex convex part extend respectively to adjacent two drainage structure drainage convex part.

8. The heat exchanger of claim 7, wherein:

the vortex structure includes two the vortex convex part, two the vortex convex part is arranged around along the air inlet direction.

9. The heat exchanger of claim 8, wherein:

the turbulence convex part is arc-shaped, and the arc openings of the two turbulence convex parts are opposite.

10. The heat exchanger of claim 1, wherein:

the heat exchange units are at least two and are arranged along the air inlet direction, and the fins of any two adjacent heat exchange units are staggered with each other.