CN214891971U - Evaporator heat exchange tube, evaporator and air conditioning unit - Google Patents

Abstract

The utility model relates to an evaporator heat exchange tube, evaporimeter and air conditioning unit, wherein the evaporator heat exchange tube includes body (1), a plurality of fin (2) and fin (4), and a plurality of fin (2) set up the surface of body (1), wherein at least two fin (2) form evaporation cavity (3), and fin (4) set up the inside of evaporation cavity (3) and general the inner space of evaporation cavity (3) is separated for two at least components of a whole that can function independently cavities, every divide the indoor gasification core that all is equipped with of cavity to produce structure (5) in order to generate the bubble. The utility model discloses all can the gassing in every components of a whole that can function independently cavity, the bubble that generates moreover can merge fast and break away from to reinforce the efficiency of boiling heat transfer, improve the heat transfer effect.

Description

Evaporator heat exchange tube, evaporator and air conditioning unit

Technical Field

The utility model relates to an evaporation heat transfer technical field especially relates to an evaporimeter heat exchange tube, evaporimeter and air conditioning unit.

Background

As a novel and efficient energy-saving device, the horizontal tube falling film evaporator gradually replaces a flooded evaporator with the advantages of small refrigerant charge amount, small static hydraulic pressure difference, high heat exchange efficiency, convenient oil return and the like. Different from a flooded evaporator, a liquid refrigerant of a horizontal tube falling film evaporator needs to enter the evaporator from the upper part, and after the liquid refrigerant is homogenized by a liquid distributor, the falling liquid film flows between tube bundles by gravity. Although general falling film evaporators are all provided with liquid distributors, even liquid distribution plates are arranged at different heights in a segmented manner, in the falling film evaporation process, due to the evaporation of liquid refrigerants and the reduction of volume flow, a liquid film at the rear end of a falling film area is inevitably broken, and dry spots are generated. Therefore, how to uniformly spread the liquid on the surface of the heat exchange tube at the rear end of the membrane lowering area while strengthening the heat exchange is one of the design difficulties of the high-efficiency heat exchange tube to reduce the generation of dry spots.

In the horizontal tube falling film evaporation process, boiling heat exchange is also a means for enhancing heat exchange, and the performance of the falling film evaporator can be improved by improving the heat transfer efficiency in the process of enhancing boiling heat exchange. At present, the enhanced boiling heat exchange means of the high-efficiency evaporation tube in the industry mainly comprises the steps of changing the density of a fin-shaped enhanced gasification core, accelerating the bubble separation process and expanding the surface to increase the heat exchange area, and the heat exchange effect of the means still cannot meet the ideal requirement.

It is noted that the information disclosed in this background section of the invention is only for enhancement of understanding of the general background of the invention, and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides an evaporimeter heat exchange tube, evaporimeter and air conditioning unit can effectively improve the heat transfer effect.

According to the utility model discloses a first aspect provides an evaporator heat exchange tube, include:

a pipe body;

a plurality of fins disposed on an outer surface of the tube body, wherein at least two of the fins form an evaporation chamber; and

the fin is arranged in the evaporation chamber and divides the inner space of the evaporation chamber into at least two split chambers, and a gasification core generation structure is arranged in each split chamber to generate bubbles.

In some embodiments, the at least two separate chambers have different projected areas on the outer surface of the tubular body.

In some embodiments, the projection of the fins on the outer surface of the tube is Y-shaped to divide the interior space of the evaporation chamber into three separate chambers.

In some embodiments, four fins form a square evaporation chamber.

In some embodiments, the plurality of fins are arranged at intervals to form a first channel extending in a circumferential direction of the tube body and a second channel extending in an axial direction of the tube body.

In some embodiments, the first and second passages each extend through the evaporation chamber and form an opening on a side of the evaporation chamber remote from the outer surface of the tube body.

In some embodiments, the height of the fins is less than the height of the fins.

In some embodiments, the fin includes a fin body perpendicularly attached to the outer surface of the tube body and a cover plate attached to an end of the fin body remote from the tube body.

In some embodiments, the projected area of the cover plate on the outer surface of the tube body is larger than the projected area of the fin body on the outer surface of the tube body.

In some embodiments, the portions of the cover plate on opposite sides of the fin body have equal projected areas on the outer surface of the tube body.

In some embodiments, the cover plate has a hexagonal shape in cross-section, and the hexagon has two right angles.

In some embodiments, the cover plate has a thickness of 0.05mm to 0.15 mm.

In some embodiments, the gasification core generation structure includes a tapered bore section extending from the outer surface of the pipe body toward the interior of the pipe body, and a cross-sectional area of the tapered bore section gradually decreases in a direction from the outer surface of the pipe body toward the interior of the pipe body.

According to a second aspect of the present invention, an evaporator is provided, which comprises the above-mentioned evaporator heat exchange tube.

According to a third aspect of the present invention, there is provided an air conditioning unit, comprising the above-mentioned evaporator heat exchange tube or the above-mentioned evaporator.

Based on the technical scheme, the embodiment of the utility model provides an inside fin that has set up through the evaporation cavity that the fin formed, can separate the inner space of evaporation cavity for two at least components of a whole that can function independently cavities through the fin, and be equipped with the gasification core production structure that is used for generating the bubble in every components of a whole that can function independently cavity respectively, greatly increased the density of gasification core, all can the gassing in every components of a whole that can function independently cavity, and produced bubble can merge each other in the development process in each components of a whole that can function independently cavity that is arranged in same evaporation cavity, and through the faster bubble of generating speed drive the slower bubble of speed, thereby improve the speed that the bubble generated and developed, the separation from of bubble with higher speed, reinforce the efficiency of boiling heat transfer, improve the heat transfer effect.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:

fig. 1 is a perspective view showing an expanded structure of an embodiment of a heat exchange tube for an evaporator according to the present invention.

Fig. 2 is a top view of an expanded configuration of one embodiment of an evaporator heat exchange tube of the present invention.

Fig. 3 is a side view of an expanded configuration of one embodiment of an evaporator heat exchange tube of the present invention.

In the figure:

1. a pipe body; 11. a helical internal tooth; 2. a fin; 21. a fin body; 22. a cover plate; 3. an evaporation chamber; 31. a first split chamber; 32. a second split chamber; 33. a third split chamber; 4. ribs; 5. a gasification core generating structure; 6. a first channel; 7. a second channel; 8. and (4) opening.

Detailed Description

The technical solutions 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 obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. 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.

In the description of the present invention, it is to be understood that the terms "center", "lateral", "longitudinal", "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the scope of the invention.

As shown in fig. 1, in some embodiments of the heat exchange tube of the evaporator provided by the present invention, the heat exchange tube includes a tube body 1, a plurality of fins 4 and a plurality of fins 2, the plurality of fins 2 are disposed on the outer surface of the tube body 1, wherein at least two fins 2 form an evaporation chamber 3, the fins 4 are disposed inside the evaporation chamber 3 and separate the inner space of the evaporation chamber 3 into at least two separated chambers, and each separated chamber is provided with a gasification core generation structure 5 for generating bubbles.

In the above embodiment, the fins 4 are arranged inside the evaporation chamber 3 formed by the fins 2, the internal space of the evaporation chamber 3 can be divided into at least two split chambers by the fins 4, and each split chamber is internally provided with the gasification core generation structure 5 for generating bubbles, so that bubbles can be generated in each split chamber, the density of the gasification core is greatly increased, the bubbles generated in each split chamber in the same evaporation chamber can be combined with each other in the development process, and the bubbles with the lower speed are driven by the bubbles with the higher generation speed, so that the generation and development speed of the bubbles is increased, the separation of the bubbles is accelerated, the boiling heat exchange efficiency is enhanced, and the heat exchange effect is improved.

In some embodiments, the projected areas of the at least two separate chambers on the outer surface of the body 1 are different. Through setting up two at least components of a whole that can function independently cavities into the projection area difference, can further aggravate the bubble difference in the aspect such as size and generating speed that forms at each components of a whole that can function independently cavity, further strengthen the effect of the slower bubble of the drive generation speed of bubble through the faster bubble of generating speed to accelerate the formation of bubble, improve heat transfer effect.

In some embodiments, the projection of the ribs 4 on the outer surface of the tube 1 is Y-shaped to divide the inner space of the evaporation chamber 3 into three separate chambers. By arranging the fins 4 in a Y-shaped form, the internal space of one evaporation chamber 3 can be conveniently divided into three split chambers, and the generation and the separation of bubbles are accelerated.

In other embodiments, the fins 4 may have other shapes, for example, the fins 4 have a linear shape to divide the evaporation chamber 3 into two separate chambers; or the fins 4 are cross-shaped and divide the evaporation chamber 3 into four separate chambers, etc.

In some embodiments, four fins 2 form a square evaporation chamber 3. The arrangement can make the shape of the evaporation chamber 3 more uniform, is convenient for arranging a plurality of evaporation chambers 3 which are uniformly discharged on the outer surface of the pipe body 1, and is also beneficial to arranging more evaporation chambers 3 in a limited space.

In other embodiments, the evaporation chamber 3 may have other shapes, such as a triangle, a circle, a pentagon, etc. The number of fins 2 forming the evaporation chamber 3 can be chosen accordingly.

In some embodiments, the plurality of fins 2 are arranged at intervals to form a first passage 6 extending in the circumferential direction of the pipe body 1 and a second passage 7 extending in the axial direction of the pipe body 1. Through setting up first passageway 6 and second passageway 7, be convenient for form a plurality of independent evaporation chamber 3 on the one hand, on the other hand can increase the heat transfer area of body 1, be favorable to the formation of bubble, grow up and spill over.

Through the first channels 6 and the second channels 7 which are arranged in a staggered mode, the liquid refrigerant can be uniformly spread to the surface of the tube body 1 of the heat exchange tube, and the problem that the liquid distribution of the falling film evaporator using the heat exchange tube is uneven at the tail end of a falling film area is solved.

In some embodiments, the first passage 6 and the second passage 7 each pass through the evaporation chamber 3 and form an opening 8 on a side of the evaporation chamber 3 remote from the outer surface of the tube body 1. Through making first passageway 6 and second passageway 7 pass evaporation chamber 3 respectively, also set up the circulation passageway in evaporation chamber 3's inside promptly, so both can increase heat transfer area, can accelerate bubble again and generate, the bubble of being convenient for spills over, the reinforcing heat transfer.

In some embodiments, the height of the ribs 4 is less than the height of the fins 2. The fins 4 are used for dividing the evaporation chamber 3 into at least two small split chambers, and the height of the fins 4 can meet the requirement for dividing the chambers, so that the situation that the generation, combination and separation of bubbles are influenced due to the fact that the fins 4 are too high is avoided.

In some embodiments, the fin 2 includes a fin body 21 and a cover plate 22, the fin body 21 is perpendicularly attached to the outer surface of the tube body 1, and the cover plate 22 is attached to an end of the fin body 21 away from the tube body 1.

The fin body 21 is vertically connected to the outer surface of the tube body 1, and a cover plate 22 is disposed at one end of the fin body 21 away from the tube body 1, so that a predetermined distance is provided between the cover plate 22 and the outer surface of the tube body 1, thereby facilitating the formation of a plurality of independent evaporation chambers 3 between the cover plate 22 and the outer surface of the tube body 1.

The fin body 21 and the tube body 1 may be fixedly connected or integrally formed.

In some embodiments, the projected area of the cover plate 22 on the outer surface of the tube body 1 is larger than the projected area of the fin body 21 on the outer surface of the tube body 1. The projection area of the cover plate 22 is large, and the cover plate 22 can form a blocking effect on one side of the evaporation chamber 3, which is far away from the outer surface of the tube body 1, so that a space for small bubbles to continuously accumulate and grow is formed, the waiting time for generating new bubbles is reduced, and the bubbles can be continuously generated, combined and separated conveniently.

In some embodiments, the portions of the cover plate 22 located on opposite sides of the fin body 21 have equal projected areas on the outer surface of the tube body 1. The arrangement can enable the two evaporation chambers 3 to share the same cover plate 22 and the same fin body 21, so that more evaporation chambers 3 can be formed conveniently, more gasification core generating structures 5 can be arranged conveniently, the generation quantity and speed of bubbles can be increased, and the boiling heat exchange efficiency can be enhanced.

In some embodiments, the cross-section of the cover plate 22 is hexagonal in shape, with the hexagon having two right angles. This shape facilitates the function of the cover plate 22 to form the evaporation chambers 3, while enabling the cover plate 22 to be utilized to form more evaporation chambers 3.

In other embodiments, the cover 22 may have other shapes, such as triangular, quadrilateral, pentagonal, etc.

In some embodiments, the gasification core generation structure 5 includes a tapered bore section extending from the outer surface of the pipe body 1 toward the inside of the pipe body 1, and the cross-sectional area of the tapered bore section is gradually reduced in a direction from the outer surface of the pipe body 1 toward the inside of the pipe body 1. The conical hole section is convenient to machine and is convenient for generating and separating bubbles.

The structure of an embodiment of the heat exchange tube of the evaporator of the present invention is described below:

as shown in fig. 1 and 2, the heat exchange tube includes a tube body 1 and fins 2, and is a structural schematic diagram in which the tube body 1 is expanded in the circumferential direction. The inner wall of the pipe body 1 is provided with spiral inner teeth 11, so that the pipe body 1 can be conveniently connected with other parts.

The fin 2 includes a fin body 21 and a cover plate 22, the fin body 21 is vertically installed on the outer surface of the tube body 1, the cover plate 22 is connected to one end of the fin body 21 away from the tube body 1, and in fig. 1, the cover plate 22 is parallel to the outer surface of the tube body 1.

The fin body 21 is disposed obliquely with respect to the axial direction of the tube body 1. As shown in fig. 2, four fin bodies 21 surround to form one independent evaporation chamber 3. The outer surface of the tube body 1 is provided with a plurality of fin bodies 21, around which a plurality of independent evaporation chambers 3 are formed. Wherein some two adjacent evaporation chambers 3 share the same fin 2. Each evaporation chamber 3 is internally provided with a Y-shaped fin 4, the fin 4 being mounted on the outer surface of the tube body 1, the height of the fin 4 being less than the height of the fin body 21. The fins 4 divide one evaporation chamber 3 into a first divided chamber 31, a second divided chamber 32 and a third divided chamber 33. A gasification core generation structure 5 is respectively arranged in each split cavity.

As shown in fig. 2, a square Z1 indicated by a dotted line is a projection of one of the evaporation chambers 3 on the outer surface of the tube body 1. The projection of the first split chamber 31 formed by the ribs 4 on the outer surface of the tube body 1 is square, and the projection of the second split chamber 32 and the projection of the third split chamber 33 on the outer surface of the tube body 1 are both in the shape of a right trapezoid. The central separation point of the rib 4 is located at a position lower than the central point of the square Z1, so that the area of the projection of the first chamber 31 on the outer surface of the tubular body 1 is greater than 1/4 of the area of the projection of the evaporation chamber 3 on the outer surface of the tubular body 1. The projected areas of the second and third divided chambers 32 and 33 on the outer surface of the pipe body 1 are equal. The first, second and third split chambers 31, 32 and 33 are respectively provided with a gasification core generation structure 5 (in fig. 2, except for three split chambers separated by the last row of fins 4, it can be seen that each of the gasification core generation structures 5 is provided, only one split chamber separated by the upper rows of fins 4 can be seen to be provided with one gasification core generation structure 5, and the gasification core generation structures 5 provided by other split chambers are shielded by the cover plate 22).

A plurality of first passages 6 and second passages 7 are formed in parallel on the outer surface of the pipe body 1, the first passages 6 extending in the circumferential direction of the pipe body 1, and the second passages 7 extending in the axial direction of the pipe body 1. A first channel 6 and a second channel 7 are formed within the evaporation chamber 3 and between the two evaporation chambers 3.

The cover plate 22 has a hexagonal shape and includes two opposite right angles. Four cover plates 22 form a small square opening 8 therebetween, and the projection of the opening 8 on the outer surface of the pipe body 1 is a square Z2. The opening 8 may serve as an inlet or outlet for the heat exchange fluid to enter or exit the evaporation chamber 3 or an outlet for the bubbles to escape from the evaporation chamber 3.

As shown in FIG. 3, the fin body 21 has a tooth height H1 of 0.4mm to 0.8mm, preferably 0.6 mm. The height H2 of the ribs 4 is 0.05mm-0.15mm, preferably 0.1 mm. The width H3 of the first channel 6 is 0.1-0.3mm, preferably 0.2 mm. The cover plate 22 has a thickness H4 of 0.05mm to 0.15mm, preferably 0.1 mm. The opening 8 in the top of the single evaporation chamber 3 has a diagonal length H5 of 0.3-0.5mm, preferably 0.4 mm. The diagonal length H6 of the individual evaporation chambers 3 is 0.8-1.2mm, preferably 1 mm. The gasification core generation structure 5 is a conical hole, the diameter of the bottom of the gasification core generation structure is 0.03-0.07 mm, the optimized diameter is 0.05mm, and the included angle of the conical top is 60 degrees.

The numerical range comprehensively considers the processing difficulty and the boiling heat exchange effect, and if the numerical range is out of the range, the processing is possibly not facilitated, or the nucleate boiling heat transfer efficiency is deteriorated.

The embodiment of the utility model provides an in, all be equipped with the gasification core in every components of a whole that can function independently cavity and produce the structure, the density of gasification core is great, can show the reinforcing heat transfer.

The embodiment of the utility model provides an in, the projected area of the components of a whole that can function independently cavity that three gasification core produced structure 5 and located on the surface of body 1 adopts inhomogeneous distribution to this forms the main, the development process that assists bubble formation-mergence-break away from, and the bubble constantly merges, rocks in the formation process, effectively accelerates breaking away from of bubble, strengthens the heat exchange efficiency in the bubble formation process, promotes and uses the utility model discloses the performance of the evaporimeter of heat-transfer pipe embodiment.

The embodiment of the utility model provides an in, every fin 2's top all is equipped with apron 22, and apron 22's area is greater than the area of fin body 21, can produce certain effect of sheltering from, can make the small bubble gather with higher speed to be favorable to accelerateing the bubble and break away from.

The embodiment of the utility model provides an in, 2 interval arrangements of fin form many staggered arrangement's first passageway 6 and second passageway 7, can make liquid refrigerant spread out gradually at falling liquid film flow in-process, realize even cloth membrane, improve the uneven problem of falling film district rear end cloth liquid.

Based on the evaporimeter heat exchange tube in above-mentioned each embodiment, the utility model discloses still provide an evaporimeter, this evaporimeter includes foretell evaporimeter heat exchange tube.

For example, the horizontal tube falling film evaporator can adopt the heat exchange tubes in the above embodiments, so as to realize uniform liquid distribution and avoid occurrence of dry spots.

The utility model also provides an air conditioning unit, this evaporimeter include foretell evaporimeter heat exchange tube or foretell evaporimeter.

By adopting the evaporator heat exchange tube or the evaporator, the heat exchange effect can be improved, and the heat exchange performance of the air conditioning unit is improved.

The positive technical effects of the heat exchange tubes of the evaporator in the above embodiments are also applicable to the evaporator and the air conditioning unit, and are not described herein again.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the utility model discloses a do not deviate from under the prerequisite of the principle, still can be right the utility model discloses a specific embodiment modifies or carries out the equivalent replacement to some technical features, and these are modified and should be covered with the equivalent replacement in the middle of the technical scheme scope of the utility model.

Claims (15)

1. An evaporator heat exchange tube, comprising:

a pipe body (1);

a plurality of fins (2) arranged on the outer surface of the tube body (1), wherein at least two of the fins (2) form an evaporation chamber (3); and

the fin (4) is arranged in the evaporation chamber (3) and divides the inner space of the evaporation chamber (3) into at least two separated chambers, and a gasification core generation structure (5) is arranged in each separated chamber to generate bubbles.

2. An evaporator heat exchange tube according to claim 1, wherein at least two divided chambers have different projected areas on the outer surface of the tube body (1).

3. An evaporator heat exchange tube according to claim 1, characterized in that the projection of the fins (4) on the outer surface of the tube body (1) is Y-shaped to divide the inner space of the evaporation chamber (3) into three separate chambers.

4. An evaporator heat exchange tube according to claim 1, wherein four of said fins (2) form said evaporation chamber (3) in a square shape.

5. An evaporator heat exchange tube according to claim 1 wherein a plurality of the fins (2) are arranged at intervals to form a first channel (6) extending in the circumferential direction of the tube body (1) and a second channel (7) extending in the axial direction of the tube body (1).

6. An evaporator heat exchange tube according to claim 5, wherein the first channel (6) and the second channel (7) respectively pass through the evaporation chamber (3) and form an opening (8) at a side of the evaporation chamber (3) remote from the outer surface of the tube body (1).

7. An evaporator heat exchange tube according to claim 1, wherein the height of the rib (4) is smaller than that of the fin (2).

8. An evaporator heat exchange tube according to claim 1, wherein the fin (2) comprises a fin body (21) and a cover plate (22), the fin body (21) is perpendicularly connected to the outer surface of the tube body (1), and the cover plate (22) is connected to one end of the fin body (21) far away from the tube body (1).

9. An evaporator heat exchange tube according to claim 8, wherein the projected area of the cover plate (22) on the outer surface of the tube body (1) is larger than the projected area of the fin body (21) on the outer surface of the tube body (1).

10. An evaporator heat exchange tube according to claim 8, wherein the projected areas of the portions of the cover plate (22) on the opposite sides of the fin body (21) on the outer surface of the tube body (1) are equal.

11. An evaporator heat exchange tube according to claim 8, wherein the cross section of the cover plate (22) is hexagonal in shape, and the hexagon has two right angles.

12. An evaporator heat exchange tube according to claim 8, wherein the thickness of the cover plate (22) is 0.05mm-0.15 mm.

13. An evaporator heat exchange tube according to claim 1, wherein the gasification core generation structure (5) comprises a tapered bore section extending from the outer surface of the tube body (1) to the inside of the tube body (1), and the cross-sectional area of the tapered bore section is gradually reduced in the direction from the outer surface of the tube body (1) to the inside of the tube body (1).

14. An evaporator comprising an evaporator heat exchange tube according to any one of claims 1 to 13.

15. An air conditioning assembly comprising an evaporator heat exchange tube according to any one of claims 1 to 13 or an evaporator according to claim 14.

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