CN101556123A - Internal teeth heat transfer tube - Google Patents
Internal teeth heat transfer tube Download PDFInfo
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- CN101556123A CN101556123A CNA2009100769253A CN200910076925A CN101556123A CN 101556123 A CN101556123 A CN 101556123A CN A2009100769253 A CNA2009100769253 A CN A2009100769253A CN 200910076925 A CN200910076925 A CN 200910076925A CN 101556123 A CN101556123 A CN 101556123A
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- heat transfer
- internal teeth
- tooth
- cavity
- transfer tube
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Abstract
The invention provides an internal teeth heat transfer tube, and particular relates to an internal teeth heat transfer tube used for refrigeration and air conditioning equipment. The inner surface of the internal teeth heat transfer tube is provided with a plurality of mutually parallel tooth ribs. The tooth top width of the tooth rib is more than the width of root of tooth. The tooth top is provided with a concave groove. The sections at two side walls of the tooth rib are straight lines. An opening cavity is arranged between the teeth of two adjacent tooth ribs. The width of the bottom of the cavity is more than that of the mouth of the cavity. As the width of the mouth of the cavity of the internal teeth heat transfer tube is less than that of the bottom of the cavity, the cavity is prone to generate vaporization cores and increase the number of the vaporization cores, thus leading the heat transfer tube to have comparatively high heat transfer coefficient and good heat transfer property.
Description
Technical field
The present invention relates to a kind of heat transfer element, particularly relate to a kind of internal teeth heat transfer tube that refrigeration and air-conditioning equipment are used.
Background technology
Heat-transfer pipe is a kind of evaporimeter of air-conditioning, refrigeration industry and heat transfer element in the condenser of being widely used in.Present unitary system cryogen and the refrigeration of mix refrigerant and the heat-transfer pipe in the air-conditioner that uses, what majority used is the screwed pipe that inner surface has simple helical tooth such as lance tooth.In order further to improve heat transfer system, strengthen heat-transfer effect, present stage, each manufacturer was competitively studied the tooth of this riffled tube, to improve the heat transfer property of heat-transfer pipe.
The common inner surface of existing heat-transfer pipe be provided with many equally distributed, shape, the tooth rib that size is identical, strengthen the internal surface area of heat-transfer pipe by the tooth rib, reduce laminar flow, increase turbulent flow in the tube refrigerant flow process, thereby the coefficient of heat transfer is increased, improve the heat exchange amount, make the best heat transfer property of heat-transfer pipe performance.But, in the expand tube operation of common riffled tube in the heat exchanger processing process, need to insert expand tube in the heat-transfer pipe by plug, the head that expands, make riffled tube and fin form interference fit, therefore, in this operation, because the extruding of the brute force between plug and each tooth rib of heat-transfer pipe, cause the profile of tooth of tooth rib to be subjected to heavy damage, not only reduced the effective heat exchange area, and hinder cold-producing medium the flowing of each tooth intercostal, be unfavorable for the formation of Ge Ligulixi effect, thereby the heat-transfer pipe heat exchange property is obviously reduced.
The Chinese patent publication number is CN101004336A, and the patent application that open day is on July 25th, 2007 discloses a kind of female screw heat-transfer pipe, and its inner surface is provided with many tooth ribs that are parallel to each other, and described tooth rib comprises high tooth and the low tooth that is provided with at interval.The tooth root width of described low tooth is the arc surface transition between the tooth root of two adjacent teeth intercostal less than the width of tooth top, and the cross section of tooth top can be circular arc or straight line.This scheme is in the expand tube operation; support plug by each high tooth; because the interval of equalization between each high tooth; make the extruding force of keeping in balance between high tooth and the plug; though high tooth is under the brute force extruding, profile of tooth is destroyed, and can protect low tooth excellent; thereby keep good heat exchange effect, reduced the pressure loss of refrigerant in the diabatic process.As can be seen, this invention has solved in traditional heat-transfer pipe processing because the problem that the heat exchange property that powerful extruding causes reduces, yet, be unfavorable for the generation of the nucleus of boiling between the tooth root of this two adjacent teeth intercostal for the structure of arc surface transition, and the vaporization nucleus calculation plays the dominance effect to the heat transfer of integral body, under the situation of identical heat exchange area, the vaporization nucleus calculation is many more, its heat transfer coefficient is high more, heat transfer property is good more, less vaporization nucleus calculation has then influenced the heat transfer coefficient of heat-transfer pipe, and then influences its heat transfer property.
In a word, need the urgent technical problem that solves of those skilled in the art to be exactly: how can provide a kind of good heat-transfer, heat transfer efficiency height, and the heat-transfer pipe that is easy to process.
Summary of the invention
Technical problem to be solved by this invention provides a kind of good heat-transfer, heat transfer efficiency height, and the heat-transfer pipe that is easy to process.
In order to address the above problem, the embodiment of the invention provides a kind of internal teeth heat transfer tube, and the inner surface of described internal teeth heat transfer tube is provided with many tooth ribs that are parallel to each other, and the addendum width of described tooth rib is greater than the tooth root width, described tooth top has groove, and the two side of described tooth rib cross section is a straight line; The between cog of two adjacent teeth rib is an open cavity, and the bottom width of described cavity is greater than the width of cavity mouth.
Preferably, the cross section of described groove is a triangle, and leg-of-mutton base is the part of the tooth top of described tooth rib.
Preferably, the angle at pairing angle, described leg-of-mutton base is that 0 degree is to 150 degree.
Preferably, the sidewall of the tooth rib that is adjacent of the bottom of described cavity links to each other with arc.
Preferably, the width of described cavity mouth is the 0.1-3 millimeter, and the bottom width of cavity is the 0.2-10 millimeter, and the height of cavity is the 0.15-2 millimeter.
Preferably, the bar number of described tooth rib is 10 to 100.
Preferably, described tooth rib is at described internal teeth heat transfer tube inner surface spiral surrounding, and helical angle is more than or equal to 0 degree, less than 90 degree.
Preferably, described internal teeth heat transfer tube adopts the aluminum or aluminum alloy material to make.
Preferably, the pipe diapire of described internal teeth heat transfer tube is thick is the 0.3-2 millimeter.
Preferably, the external diameter of described internal teeth heat transfer tube is the 4-25.4 millimeter.
Compared with prior art, the technical scheme of one embodiment of the present of invention has the following advantages:
At first, the cavity mouth width of the cavity of internal teeth heat transfer tube of the present invention is less than the cavity bottom width, and cavity is used to form the nucleus of boiling, according to heat transfer principle, under the identical heat exchange area situation, the quantity of the nucleus of boiling is many more, then heat transfer coefficient is high more, and heat transfer property is good more.Thereby the quantity of the nucleus of boiling plays leading role to the heat transfer of whole heat-transfer pipe, is the important indicator of estimating the heat-transfer pipe quality.Through experiment confirm, cavity of the present invention can effectively improve heat transfer coefficient than the little opened type cavity or mouthful easier generation nucleus of boiling of end cavity of a size of the cavity such as the big end of mouth of general type.
Secondly, heat-transfer pipe of the present invention can adopt the aluminum or aluminum alloy material to make, and has saved manufacturing cost greatly, and has adopted the refrigeration plant of the heat-transfer pipe of aluminum, and the weight of complete machine also will reduce greatly, be beneficial to the product lightweight.
Description of drawings
Fig. 1 is the structural representation of the preferred embodiment one of a kind of internal teeth heat transfer tube of the present invention;
Fig. 2 is the cross-sectional view of the single tooth rib of internal teeth heat transfer tube preferred embodiment one shown in Figure 1;
Fig. 3 is the partial structurtes schematic diagram of internal teeth heat transfer tube preferred embodiment one shown in Figure 1;
Fig. 4 is the structural representation of the preferred embodiment two of a kind of internal teeth heat transfer tube of the present invention;
Fig. 5 is the structural representation of the preferred embodiment three of a kind of internal teeth heat transfer tube of the present invention.
The specific embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
With reference to Fig. 1, show the structural representation of the preferred embodiment one of a kind of internal teeth heat transfer tube of the present invention.The cross section of the heat-transfer pipe 1 of present embodiment is circular, make by Heat Conduction Material, present embodiment uses aluminum or aluminum alloy material hot extrusion molding, fine aluminium system as 1050,1070,1100,1200 etc., or 3000 line aluminium alloys of interpolation 0.2-1.8% manganese, for example manganese is 3003, perhaps can consider the utilization again of material, uses the aluminum or aluminum alloy close with the aluminium foil material.Use the aluminum or aluminum alloy material to make heat-transfer pipe and can save manufacturing cost, alleviate product weight.Certainly, those skilled in the art also can adopt other material such as copper of being fit to make heat-transfer pipe, and the present invention need not make restriction to this.The outer diameter D of described heat-transfer pipe 1 can be the 4-25.4 millimeter, selects different calibers according to different heat exchange amount needs, and this scope can satisfy the caliber needs of cooling heat-transfer pipe substantially.The inner surface of heat-transfer pipe 1 is provided with many equally distributed, as to be parallel to each other tooth ribs 2, with the area of the inner surface that increases heat-transfer pipe 1, improves the heat transfer coefficient of heat-transfer pipe 1, strengthens the heat transfer property of heat-transfer pipe 1.Described each tooth rib 2 can be arranged in parallel at the inner surface of heat-transfer pipe 1 axis direction along heat-transfer pipe 1, also can arrange with the described axis direction spiral surrounding that has angle, and helical angle adopts 30 degree more than or equal to 0 degree, less than 90 degree in the present embodiment.The bar number of tooth rib 2 can be 10 to 100, and the bar number of tooth rib 2 is 60 in the present embodiment.To the distance heat-transfer pipe 1 outer surface, promptly manage the thick h2 of diapire according to the difference of the external diameter of heat-transfer pipe 1 and difference, comparatively speaking from the tooth root of tooth rib 2, the thin more then heat-transfer effect of the pipe thick h2 of diapire is good more, preferably, can be the 0.3-2 millimeter, present embodiment adopts 0.9 millimeter.
With reference to Fig. 2, show the cross sectional representation of the structure of single tooth rib 2 among Fig. 1.In the present embodiment, the cross section of the tooth top L1 of tooth rib 2 is a straight line.Preferably, the cross section of tooth top L1 can also be a camber line.The width of described tooth top L1 is greater than the width of tooth root L2, and the width of tooth top L1 can be the 0.4-20 millimeter, and tooth root L2 width can be the 0.3-15 millimeter.This tooth root width of tooth rib 2 can further increase the heat transfer area of heat-transfer pipe 1 inner surface less than the profile of tooth of the width of tooth top.The cross section of the side walls S of tooth rib 2 is a straight line, and two side S equates that with the angle of tooth top L1 the cross section straight length of two side S also equates.Have the isoceles triangle connected in star on the tooth top L1, the base of described isosceles triangle is the part of tooth top L1, is positioned at the centre of tooth top L1, is center line with the perpendicular bisector of tooth top L1, and two waist symmetries meet at the summit of the pairing angle θ in base.The angle of the pairing angle θ in base can for 0 the degree to 150 the degree, present embodiment be 60 the degree.Need to prove, the cross section of tooth top L1 also can be camber line or other shape, two side and the angle of tooth top L1 can equate also can be unequal, equally, the cross section straight length of two side S also can be unequal, those skilled in the art can make suitable change as required, and the present invention need not make restriction to this.In addition, the groove of tooth top L1 also can be other shape, as circular arc or rectangle etc., also needn't make center line or the like with the perpendicular bisector of tooth top L1, and the present invention does not make restriction one by one to this.
The structure of the open cavity 3 between the tooth root of two adjacent teeth rib 2 as shown in Figure 3, described cavity 3 bottom the widest part width b2 are greater than cavity mouth width b1, cavity 3 is a cavity sidewalls with the sidewall S of two adjacent tooth ribs 2, preferably, the width b1 of the cavity mouth of cavity 3 can be the 0.1-3 millimeter, bottom the widest part width b2 of cavity 3 can be the 0.2-10 millimeter, and the height h1 of cavity 3 can be the 0.15-2 millimeter.In the present embodiment, the sidewall S of cavity 3 is connected with the bottom V circular arc of cavity 3, and this arc connects the tooth root intensity that has not only guaranteed tooth rib 2, has also increased the space that the cooling matchmaker between the adjacent teeth rib 2 is flowed, and has further promoted the heat exchange in the heat-transfer pipe 1.Certainly, the sidewall S of cavity 3 also can directly be connected with the bottom V of cavity 3, forms an acute angle angle, also can adopt alternate manner to connect.In heat transfer principle, during evaporation and heat-exchange, the vaporization nucleus calculation plays a part dominance to the heat transfer of integral body, and the nucleus of boiling is formed by the coring hole of heat-transfer pipe, the coring hole of heat-transfer pipe 1 is big little described cavity 3 structures of opening in bottom in the present embodiment, this structure is regardless of the liquid wettability, and is all more stable, is easy to produce the nucleus of boiling.The experiment proved that this kind structure can effectively improve the heat transfer coefficient of heat-transfer pipe 1.
The partial structurtes of the heat-transfer pipe of being made up of a plurality of tooth ribs 2 and open cavity 31 as shown in Figure 3.
With reference to Fig. 4, show the structural representation of the preferred embodiment two of a kind of internal teeth heat transfer tube of the present invention.In this preferred embodiment, the cross section of heat-transfer pipe 1 is circular, adopts the fine aluminium material to make, and the outer diameter D of heat-transfer pipe 1 is 9.52 millimeters.The inner surface of heat-transfer pipe 1 is provided with 18 equally distributed, as to be parallel to each other tooth ribs 2, and each tooth rib 2 is arranged in parallel at the inner surface of heat-transfer pipe 1 axis direction along heat-transfer pipe 1, and the thick h2 of pipe diapire of heat-transfer pipe 1 is 0.7 millimeter.The tooth top L1 cross section of tooth rib 2 is a straight line, and preferred, the tooth top cross section can be a camber line.Tooth top L1 width is 1.1 millimeters, and tooth root L2 width is 1.0 millimeters.Have triangular groove on the tooth top, described leg-of-mutton base is the part of tooth top, and the angle of the pairing angle θ in base is 60 degree.Open cavity 3 the widest part b2 are 0.5 millimeter, and greater than cavity mouth b1 width, 0.2 millimeter, cavity is a cavity sidewalls with the sidewall of two adjacent tooth ribs 2, and the height h1 of cavity is 0.3 millimeter.
With reference to Fig. 5, show the structural representation of the preferred embodiment three of a kind of internal teeth heat transfer tube of the present invention, the difference of present embodiment and internal teeth heat transfer tube embodiment shown in Figure 4 is, the tooth top L1 cross section of tooth rib 2 is a camber line, the angle that the cavity sidewalls of open cavity 3 and cavity bottom form is the acute angle angle that two straight lines form, the widest part of cavity 3 is a cavity bottom, and width b2 is 0.7 millimeter.Remainder gets final product referring to embodiment shown in Figure 4.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, and what each embodiment stressed all is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.
More than a kind of internal teeth heat transfer tube provided by the present invention is described in detail, used specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1, a kind of internal teeth heat transfer tube is characterized in that, the inner surface of described internal teeth heat transfer tube is provided with many tooth ribs that are parallel to each other, and the addendum width of described tooth rib is greater than the tooth root width, and described tooth top has groove, and the two side of described tooth rib cross section is a straight line; The between cog of two adjacent teeth rib is an open cavity, and the bottom width of described cavity is greater than the width of cavity mouth.
2, internal teeth heat transfer tube according to claim 1 is characterized in that, the cross section of described groove is a triangle, and leg-of-mutton base is the part of the tooth top of described tooth rib.
3, internal teeth heat transfer tube according to claim 2 is characterized in that, the angle at pairing angle, described leg-of-mutton base is that 0 degree is to 150 degree.
According to claim 1,2 or 3 described internal teeth heat transfer tubes, it is characterized in that 4, the sidewall of the tooth rib that the bottom of described cavity is adjacent links to each other with arc.
According to claim 1,2 or 3 described internal teeth heat transfer tubes, it is characterized in that 5, the width of described cavity mouth is the 0.1-3 millimeter, the bottom width of cavity is the 0.2-10 millimeter, and the height of cavity is the 0.15-2 millimeter.
According to claim 1,2 or 3 described internal teeth heat transfer tubes, it is characterized in that 6, the bar number of described tooth rib is 10 to 100.
According to claim 1,2 or 3 described internal teeth heat transfer tubes, it is characterized in that 7, described tooth rib is at described internal teeth heat transfer tube inner surface spiral surrounding, helical angle is more than or equal to 0 degree, less than 90 degree.
According to claim 1,2 or 3 described internal teeth heat transfer tubes, it is characterized in that 8, described internal teeth heat transfer tube adopts the aluminum or aluminum alloy material to make.
According to claim 1,2 or 3 described internal teeth heat transfer tubes, it is characterized in that 9, the pipe diapire of described internal teeth heat transfer tube is thick to be the 0.3-2 millimeter.
According to claim 1,2 or 3 described internal teeth heat transfer tubes, it is characterized in that 10, the external diameter of described internal teeth heat transfer tube is the 4-25.4 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100769253A CN101556123A (en) | 2009-01-14 | 2009-01-14 | Internal teeth heat transfer tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100769253A CN101556123A (en) | 2009-01-14 | 2009-01-14 | Internal teeth heat transfer tube |
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| Publication Number | Publication Date |
|---|---|
| CN101556123A true CN101556123A (en) | 2009-10-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2009100769253A Pending CN101556123A (en) | 2009-01-14 | 2009-01-14 | Internal teeth heat transfer tube |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305568A (en) * | 2011-09-28 | 2012-01-04 | 金龙精密铜管集团股份有限公司 | Internal threaded copper pipe |
-
2009
- 2009-01-14 CN CNA2009100769253A patent/CN101556123A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305568A (en) * | 2011-09-28 | 2012-01-04 | 金龙精密铜管集团股份有限公司 | Internal threaded copper pipe |
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Application publication date: 20091014 |