CN111928539A - Heat exchanger and air conditioner - Google Patents

Abstract

The application provides a heat exchanger and an air conditioner, which comprise fins, wherein each fin comprises a corrugated section, each corrugated section extends in a corrugated shape, the wave crest of each corrugated section is a plane, and the extending direction of the wave crest is the same as the extending direction of the corrugated section; the heat exchanger comprises at least two fins, a heat dissipation channel is formed between every two adjacent fins, and wave crests of the adjacent fins are arranged oppositely. The application provides a heat exchanger, air conditioner can increase the disturbance of heat transfer fluid when the heat dissipation passageway flows, improves the heat transfer coefficient of convection, and then has improved the heat transfer performance of heat exchanger.

Description

Heat Exchanger, Air Conditioner

technical field

The application belongs to the technical field of air conditioning, and in particular relates to a heat exchanger and an air conditioner.

Background technique

The fin-and-tube heat exchanger is a commonly used form of heat exchanger in various industries such as refrigeration and air conditioning, chemical industry and so on. Most of the fins on the existing heat exchangers are corrugated fins. Due to the structure of the corrugated fins, the heat transfer coefficient of the corrugated fins is low, thereby reducing the heat transfer performance of the heat exchanger.

SUMMARY OF THE INVENTION

Therefore, the technical problem to be solved by this application is to provide a heat exchanger and an air conditioner, which can increase the disturbance of the heat exchange fluid when flowing in the heat dissipation channel, improve the convective heat transfer coefficient, and then improve the heat exchange performance of the heat exchanger. .

In order to solve the above problems, the present application provides a heat exchanger, comprising fins, the fins include corrugated sections, the corrugated sections extend in a corrugated shape, the wave crests of the corrugated sections are flat, and the extension of the wave crests The direction is the same as the extending direction of the corrugated segment;

The heat exchanger includes at least two fins, a heat dissipation channel is formed between the adjacent fins, and the wave crests of the adjacent fins are arranged oppositely.

Preferably, the corrugated section includes at least one of the wave crests, the corrugated section further includes a first slope surface and a second slope surface, the first slope surface is provided at the first end of the wave crest, the second slope surface is The slope is arranged at the second end of the slope, the first slope is arranged at an obtuse angle with the wave crest, and the second slope is arranged at an obtuse angle with the wave crest.

Preferably, the angle formed by the first slope surface and the wave crest is 120°˜165°, and/or the angle formed by the second slope surface and the wave crest is 120°˜165°.

Preferably, the extension direction of the wave crest is the first direction;

The projection of the first slope on the plane where the wave crest is located is a first projection, and the length of the first projection along the first direction is greater than the length of the wave crest along the first direction; and/or, The projection of the second slope on the plane where the wave crest is located is a second projection, and the length of the second projection along the first direction is greater than the length of the wave crest along the first direction.

Preferably, the first slope surface and the second slope surface are arranged symmetrically with the vertical bisector of the wave crest as the axis of symmetry.

Preferably, the wave trough of the corrugated section is a plane, and the wave trough and the wave crest are arranged in parallel.

Preferably, the lengths of the wave crest and the wave trough in the extending direction of the wave crest are the same.

Preferably, the fin further includes a starting section, the starting section is arranged on the upstream side of the corrugated section along the flow direction of the heat exchange fluid in the heat dissipation channel, and the starting section is parallel to the wave crest The initial sections of the adjacent fins are arranged opposite to each other.

Preferably, the fins further include an end section, the end section is arranged on the downstream side of the corrugated section along the flow direction of the heat exchange fluid in the heat dissipation channel, the end section is arranged in parallel with the wave crest, and is opposite to the wave crest. The end sections of the adjacent fins are disposed opposite to each other.

Preferably, the corrugated section includes three wave crests, the three wave crests are located in the same plane, the corrugated section includes two wave troughs, and the two wave troughs are located in the same plane.

Preferably, the corrugated section includes a first wave crest, a second wave crest and a third wave crest, and the first wave crest, the second wave crest and the third wave crest are along the flow direction of the heat exchange fluid in the heat dissipation channel Arranged in sequence, the first wave crest and the third wave crest are located in a first plane, the second wave crest is located in a second plane, and the first plane and the second plane are parallel.

Preferably, the second wave crest is located on the side of the first plane close to the wave trough.

Preferably, the fins are provided with mounting holes, the mounting holes are provided with pipe sleeves, the pipe sleeves are arranged coaxially with the mounting holes, the heat exchanger includes a heat exchange pipe, and the heat exchange pipe It is sleeved in the installation hole and the pipe sleeve.

Preferably, a flanging structure is provided on the peripheral outer wall of one end of the sleeve away from the fins, and the flanging structure is arranged perpendicular to the outer wall of the sleeve.

Another aspect of the present application provides an air conditioner comprising the above heat exchanger.

beneficial effect

The heat exchanger and the air conditioner provided in the embodiments of the present invention can increase the disturbance of the heat exchange fluid when flowing in the heat dissipation channel, improve the convective heat exchange coefficient, and further improve the heat exchange performance of the heat exchanger.

Description of drawings

FIG. 1 is a schematic structural diagram of the heat exchanger according to Embodiment 1 of the application;

FIG. 2 is a schematic structural diagram of the fin of Embodiment 1 of the application;

3 is a side view of the fin of Embodiment 1 of the application;

FIG. 4 is a schematic diagram of the heat dissipation fluid circulating in the heat dissipation channel according to Embodiment 1 of the application;

Fig. 5 is the velocity vector diagram of the embodiment 1 of the application;

Fig. 6 is the wind speed vector diagram of triangular fins in the prior art;

7 is a schematic structural diagram of a fin according to Embodiment 2 of the application;

FIG. 8 is a side view of the fin of Example 2 of the application.

Reference numerals are indicated as:

1. fin; 11. crest; 111, second crest; 12, trough; 13, first slope; 14, second slope; 15, start section; 16, end section; 17, mounting hole; 18 , tube sleeve; 181, flanging structure; 2, heat exchange tube.

Detailed ways

1 to 4 , according to Embodiment 1 of the present application, a heat exchanger includes fins 1 , the fins 1 include corrugated sections, the corrugated sections extend in a corrugated shape, and the wave crests 11 of the corrugated sections are planes The extension direction of the wave crest 11 is the same as the extension direction of the corrugated section. The heat exchanger includes at least two fins 1 , and heat dissipation channels are formed between adjacent fins 1 , and the wave crests 11 of adjacent fins 1 are arranged opposite. By setting the wave crests 11 of the corrugated section to be flat, and at the same time making the wave crests 11 of the adjacent fins 1 opposite to each other, the disturbance of the heat dissipation fluid in the heat dissipation channel can be enhanced, and the convective heat transfer coefficient on the side of the fins 1 can be improved, thereby strengthening the fins. 1 side heat exchange, thereby improving the heat exchange performance of the heat exchanger and the energy efficiency ratio of the whole machine, so the overall size of the heat exchanger can be reduced accordingly, and the cost can be greatly reduced. Through this, the synergy between the speed of the inlet air and the temperature gradient can also be enhanced, thereby further enhancing the heat transfer capability.

Further, in the wet condition, by setting the wave crest 11 as a plane, a channel is provided for the flow of the condensation droplets. Under wet conditions, the condensation droplets on the surface of the fin 1 gather on the wave crest 11 along both sides of the wave crest 11 under the action of the airflow drag force, and the droplets flow out of the fin 1 along the wave crest 11 by gravity, reducing the condensation droplets on the fins. 1 The retention on the surface reduces the air resistance and improves the heat exchange capacity of the heat exchanger under wet conditions.

Further, under the frosting condition, the wave crest 11 is set to be flat, which also provides a drainage channel, which is beneficial to the discharge of defrosted water, reduces the amount of frosting in the next frosting cycle, and makes the fin 1 structure more convenient to remove. Frost.

Further, the extension direction of the corrugated segment is the extension direction of the entire corrugated segment, not the extension direction of a certain segment. As shown in FIG. 3 , the extending direction of the corrugated segment extends left and right. The extension direction of the wave crest 11 is the same as the extension direction of the corrugated section, that is, the wave crest 11 also extends in the left-right direction in FIG. 3 .

Further, the outline of the outer edge of the fin 1 is substantially a rectangle, and the corrugated section and the wave crest 11 extend along the short side direction of the rectangle.

Further, the adjacent fins 1 are all corrugated, and the heat dissipation channels also extend in a corrugated shape.

Further, in this embodiment, there are a plurality of fins 1, and the fins 1 are arranged in parallel, and all the fins 1 have the same structure and are arranged in alignment.

Further, in this embodiment, the heat exchange fluid flowing in the heat dissipation channel is air.

The corrugated section includes at least one wave crest 11, and the corrugated section further includes a first slope surface 13 and a second slope surface 14, the first slope surface 13 is arranged at the first end of the wave crest 11, and the second slope surface 14 is arranged on the second slope surface 14. The first slope 13 and the wave crest 11 are arranged at an obtuse angle, and the second slope 14 is arranged at an obtuse angle with the wave crest 11 .

Further, by arranging the first slope surface 13 and the second slope surface 14, and making the first slope surface 13 and the second slope surface 14 form an obtuse angle with the wave crest 11, the formation of turbulence is ensured.

The angle formed by the first slope surface 13 and the wave crest 11 is 120°˜165°, and the angle formed by the second slope surface 14 and the wave crest 11 is 120°˜165°, which can achieve the best heat dissipation effect.

The extension direction of the wave crest 11 is the first direction; the projection of the first slope 13 on the plane where the wave crest 11 is located is the first projection, and the length of the first projection along the first direction is greater than the length of the wave crest 11 along the first direction; the second slope The projection of the surface 14 on the plane where the wave crest 11 is located is the second projection, and the length of the second projection along the first direction is greater than the length of the wave crest 11 along the first direction, which can maximize the heat dissipation effect.

Further, as shown in FIG. 3 , the lengths of the first slope surface 13 and the second slope surface 14 along the horizontal direction are smaller than the lengths of the wave crests 11 along the horizontal direction.

The first slope surface 13 and the second slope surface 14 are symmetrically arranged with the vertical bisector of the wave crest 11 as the axis of symmetry, so that the whole composed of the first slope surface 13, the wave crest 11 and the second slope surface 14 is an isosceles trapezoid, which also reduces heat dissipation. A section of the channel at the first slope surface 13 , the wave crest 11 and the second slope surface 14 is an isosceles trapezoid. The air flows along the trapezoidal heat dissipation channel, which increases the disturbance of the intake air, improves the heat transfer coefficient of the convective heat transfer between the air and the fin 1, enhances the synergy between the speed of the intake air and the temperature gradient, and effectively improves the side exchange of the fin 1. Thermal efficiency and enhanced heat transfer capability. Further, the heat exchange capacity and the energy efficiency ratio of the whole machine can be improved, so that the overall size of the heat exchanger can be reduced, and the cost will be greatly reduced.

The wave trough 12 of the corrugated section is a plane, and the wave trough 12 is arranged in parallel with the wave crest 11 , which provides a discharge channel for the condensed droplets and defrost water on the fin 1 .

Further, in the wet condition, by setting the wave trough 12 as a plane, a channel is provided for the flow of the condensation droplets. Under wet conditions, the condensation droplets on the surface of the fin 1 gather on the wave trough 12 along both sides of the wave trough 12 under the action of the airflow drag, and the droplets flow out of the fin 1 along the wave trough 12 by gravity, reducing the condensation droplets on the fins. 1 The retention on the surface reduces the air resistance and improves the heat exchange capacity of the heat exchanger under wet conditions.

Further, under the frosting condition, the trough 12 is set as a plane, which also provides a drainage channel, which is conducive to the discharge of defrosted water, reduces the amount of frosting in the next frosting cycle, and makes the structure of the fin 1 more convenient to remove. Frost.

Further, by arranging the wave crest 11 and the wave trough 12 at the same time, and making the two form opposite parallel planes, the condensation and defrosting water can be discharged in time. The problem in the prior art that the condensed droplets block the air flow channel and increase the heat exchange thermal resistance is solved, and the condensed droplets are prevented from deteriorating the heat exchange effect. At the same time, the problem of defrosting water remaining on the surface of the heat exchanger fin 1 under the frosting condition in the prior art is also solved, which increases the air flow resistance and deteriorates the heat transfer.

The lengths of the wave crest 11 and the wave trough 12 in the extension direction of the wave crest 11 are the same, which ensures the turbulent flow of the cooling fluid and the smooth discharge of condensation and defrosting water.

Further, as shown in FIG. 3 , the wave crest 11 and the wave trough 12 extend in the horizontal direction.

The fin 1 also includes a starting section 15. The starting section 15 is arranged on the upstream side of the corrugated section along the flow direction of the heat exchange fluid in the heat dissipation channel. The starting section 15 is arranged in parallel with the wave crest 11. The initial sections 15 are arranged opposite to each other, and by arranging the initial sections 15, it is ensured that the cooling fluid can smoothly enter the heat dissipation channel.

Further, the starting section 15 is arranged at the air inlet end of the fin 1 , that is, the left end as shown in FIG. 3 .

Further, as shown in FIG. 3, the initial section 15 is arranged horizontally.

The fin 1 also includes an end section 16, the end section 16 is arranged on the downstream side of the corrugated section along the flow direction of the heat exchange fluid in the heat dissipation channel, the end section 16 is arranged parallel to the wave crest 11, and the end sections 16 of adjacent fins 1 are opposite to each other By setting the end section 16, it is ensured that the cooling fluid can be smoothly discharged from the heat dissipation channel.

Further, the starting section 15 is arranged at the exhaust end of the fin 1 , that is, the right end as shown in FIG. 3 .

Further, as shown in FIG. 3, the end section 16 is arranged horizontally.

Specifically, in this embodiment, the corrugated section includes three wave crests 11 , and the three wave crests 11 are located in the same plane, and the corrugated section includes two wave troughs 12 , and the two wave troughs 12 are located in the same plane.

Further, as shown in FIG. 3 , the three wave crests 11 are located in the same horizontal plane, and the two wave troughs 12 are located in the same horizontal plane.

Further, FIG. 5 is the velocity vector diagram of the first embodiment of the application, and FIG. 6 is the wind velocity vector diagram of the triangular fin 1 in the prior art. It can be clearly seen from FIG. 5 and FIG. 6 that the fins 1 in this embodiment can enhance the disturbance of the heat dissipation fluid in the heat dissipation channel, thereby improving the convective heat transfer coefficient on the fin 1 side and strengthening the heat exchange on the fin 1 side. hot.

The fin 1 is provided with a mounting hole 17, the mounting hole 17 is provided with a tube sleeve 18, the tube sleeve 18 is arranged coaxially with the mounting hole 17, the heat exchanger includes a heat exchange tube 2, and the heat exchange tube 2 is sleeved in the installation hole 17. And in the tube sleeve 18 , the installation holes 17 are provided to provide installation positions for the heat exchange tubes 2 .

Further, the inner wall of the mounting hole 17 is in close contact with the outer wall of the heat exchange tube 2 .

Further, as shown in FIG. 3 , the sleeve 18 is provided on the upper surface of the fin 1 .

A flanging structure 181 is provided on the peripheral outer wall of one end of the tube sleeve 18 away from the fin 1 .

Further, the adjacent sleeves are butted against each other, and the flanging structure 181 is fitted on the circumference of the adjacent installation holes 17 .

Another aspect of the present embodiment provides an air conditioner, including the above heat exchanger.

Example 2

Referring to FIG. 7 to FIG. 8 , according to Embodiment 2 of the present application, the difference from Embodiment 1 is that the corrugated section includes a first wave peak 11 , a second wave peak 111 and a third wave peak 11 , and the first wave peak 11 , the second wave crest 111 and the third wave crest 11 are sequentially arranged along the flow direction of the heat exchange fluid in the heat dissipation channel, the first wave crest 11 and the third wave crest 11 are located in the first plane, the second wave crest 111 is located in the second plane, The first plane is parallel to the second plane, that is, the second wave crest 111 is not in the same plane as the first wave crest 11 and the second wave crest 111, which can also enhance the disturbance of the heat dissipation fluid in the heat dissipation channel and improve the fin 1 side. The convective heat transfer coefficient strengthens the heat transfer effect of the fin 1 side, thereby improving the heat transfer performance of the heat exchanger and the energy efficiency ratio of the whole machine.

Further, the second wave crest 111 is located on the side of the first plane close to the wave trough 12, which widens the air circulation channel and reduces the pressure drop of the air flow, thereby increasing the heat exchange of the heat exchanger and reducing the total pressure drop.

The heat exchanger and the air conditioner provided in the embodiments of the present invention can increase the disturbance of the heat exchange fluid when flowing in the heat dissipation channel, improve the convective heat exchange coefficient, and further improve the heat exchange performance of the heat exchanger.

It can be easily understood by those skilled in the art that, on the premise of no conflict, the above advantageous manners can be freely combined and superimposed.

The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. Inside. The above are only the preferred embodiments of the present application. It should be pointed out that for those skilled in the art, without departing from the technical principles of the present application, several improvements and modifications can also be made, and these improvements and modifications should also be It is regarded as the protection scope of this application.

Claims (15)

1. A heat exchanger, characterized in that it comprises a fin (1), the fin (1) comprises a corrugated section, the corrugated section extends in a corrugated shape, and the wave crest (11) of the corrugated section is a plane , the extension direction of the wave crest (11) is the same as the extension direction of the corrugated segment; The heat exchanger includes at least two fins (1), a heat dissipation channel is formed between the adjacent fins (1), and the wave crests (11) of the adjacent fins (1) are oppositely arranged . 2. The heat exchanger according to claim 1, wherein the corrugated section comprises at least one of the wave crests (11), and the corrugated section further comprises a first slope (13) and a second slope ( 14), the first slope (13) is arranged at the first end of the wave crest (11), the second slope (14) is arranged at the second end of the slope, and the first slope The surface (13) is arranged at an obtuse angle with the wave crest (11), and the second slope surface (14) is arranged at an obtuse angle with the wave crest (11). 3 . The heat exchanger according to claim 2 , wherein the angle formed by the first slope ( 13 ) and the wave crest ( 11 ) is 120°˜165°, and/or the The angle formed between the second slope surface (14) and the wave crest (11) is 120°˜165°. 4. The heat exchanger according to claim 2, wherein the extending direction of the wave crest (11) is the first direction; The projection of the first slope (13) on the plane where the wave crest (11) is located is the first projection, and the length of the first projection along the first direction is greater than the length of the wave crest (11) along the first direction. The length in one direction; and/or, the projection of the second slope (14) on the plane where the wave crest (11) is located is a second projection, and the length of the second projection along the first direction is greater than all The length of the wave crest (11) along the first direction. 5. The heat exchanger according to claim 2, wherein the first slope (13) and the second slope (14) take the vertical bisector of the wave crest (11) as the axis of symmetry Symmetrical settings. 6 . The heat exchanger according to claim 1 , wherein the wave trough ( 12 ) of the corrugated section is a plane, and the wave trough ( 12 ) is arranged in parallel with the wave crest ( 11 ). 7 . 7. The heat exchanger according to claim 6, wherein the wave crest (11) and the wave trough (12) have the same length in the extending direction of the wave crest (11). 8. The heat exchanger according to claim 1, characterized in that, the fins (1) further comprise a starting section (15), and the starting section (15) is arranged on the corrugated section along the heat exchange On the upstream side of the flow direction of the fluid in the heat dissipation channel, the starting section (15) is arranged in parallel with the wave crest (11), and the starting section (15) of the adjacent fins (1) Relative settings. 9. The heat exchanger according to claim 1, characterized in that, the fin (1) further comprises an end section (16), and the end section (16) is arranged on the corrugated section along the heat exchange fluid in the On the downstream side of the flow direction in the heat dissipation channel, the end sections (16) are arranged in parallel with the wave crests (11), and the end sections (16) of the adjacent fins (1) are arranged opposite to each other. 10. The heat exchanger according to claim 1, wherein the corrugated section includes 3 wave crests (11), the 3 wave crests (11) are located in the same plane, and the corrugated section includes 2 There are two wave valleys (12), and the two wave valleys (12) are located in the same plane. 11. The heat exchanger according to claim 1, wherein the corrugated section comprises a first wave crest (11), a second wave crest (111) and a third wave crest (11), the first wave crest (11) ), the second wave crest (111) and the third wave crest (11) are sequentially arranged along the flow direction of the heat exchange fluid in the heat dissipation channel, the first wave crest (11) and the third wave crest (11) (11) is located in a first plane, the second wave crest (111) is located in a second plane, and the first plane is parallel to the second plane. 12. The heat exchanger according to claim 11, wherein the second wave crest (111) is located on the side of the first plane close to the wave trough (12). 13. The heat exchanger according to claim 1, characterized in that, the fins (1) are provided with mounting holes (17), and the mounting holes (17) are provided with tube sleeves (18), so The tube sleeve (18) is arranged coaxially with the installation hole (17), and the heat exchanger includes a heat exchange tube (2), and the heat exchange tube (2) is sleeved on the installation hole (17) and the heat exchange tube (2). inside the sleeve (18). 14. The heat exchanger according to claim 13, characterized in that, a flanging structure (181) is provided on the peripheral outer wall of one end of the sleeve (18) away from the fin (1), and the The flanging structure (181) is arranged perpendicular to the outer wall of the sleeve (18). 15. An air conditioner, characterized by comprising the heat exchanger according to any one of claims 1-14.

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