CN204388680U - inner screw thread copper pipe structure - Google Patents
inner screw thread copper pipe structure Download PDFInfo
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- CN204388680U CN204388680U CN201420855271.0U CN201420855271U CN204388680U CN 204388680 U CN204388680 U CN 204388680U CN 201420855271 U CN201420855271 U CN 201420855271U CN 204388680 U CN204388680 U CN 204388680U
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Abstract
The utility model relates to heat transmission copper pipe technical field, disclose a kind of inner screw thread copper pipe structure, comprise copper pipe body, copper pipe body inwall is provided with two groups of tooth ribs in spiral distribution, is respectively tooth rib I, tooth rib II, the rectangular in cross-section structure of tooth rib I, the cross section of tooth rib II is triangular in shape, on the arbitrary cross section of copper pipe body, tooth rib I, tooth rib II place cambered surface respectively account for the half of circumference, and the angle β of tooth rib I, tooth rib II and copper pipe body axis is 10 °-45 °.Therefore, the utility model has can effectively reduce refrigerant circulating resistance, to improve in copper pipe body exchange rate between different parts refrigerant thus strengthens the beneficial effect of copper pipe body internal-external heat exchange performance.
Description
Technical field
The utility model relates to heat transmission copper pipe technical field, particularly relates to a kind of inner screw thread copper pipe structure.
Background technology
Condenser in air-conditioning and evaporimeter are all formed by inner screw thread copper pipe dish system, inner screw thread copper pipe is upgraded to from light pipe in heat-transfer pipe technical field, it is a large technological innovation, greatly improve air conditioner refrigerating, the performance heated, current inner screw thread copper pipe is all generally single helicla flute or helical tooth, also there are many documents or patent discloses the helical tooth of different cross section shape, such as there is M shape, Y shape, trapezoidal, semi-circular teeth, the profile of tooth of various shape is exactly nothing but to increase heat transfer surface area, but for inner screw thread copper pipe, only that the cross sectional shape changing tooth does not fundamentally increase heat transfer performance, and the tooth Profile Machining had is very difficult, some profiles of tooth can increase media flow resistance, counter productive can be brought, even reduce the heat transfer performance of screwed pipe itself.
Chinese patent Authorization Notice No.: CN100365370C, authorized announcement date on January 30th, 2008, disclose a kind of female screw heat-transfer pipe, its inner surface has helical tooth, and the cross section of helical tooth is Y-shaped, has an open cavity between two adjacent teeth, the height of the two side of tooth is equal or unequal, the Breadth Maximum of adjacent two between cog cavitys is greater than the width of cavity, and heat-transfer pipe is suitable for room, an air-conditioner, is particularly useful for cold dim type room air conditioner.Its weak point is that Y shape tooth can increase the circulating resistance of refrigerant in copper pipe, be unfavorable for heat trnasfer inside and outside copper pipe, refrigerant is more even at copper Bottomhole pressure, flow-disturbing intensity is little, between copper pipe inwall place and the refrigerant in copper pipe centre, heat exchange is slower, heat is formed with the refrigerant of copper pipe center poor after copper pipe inwall place's refrigerant and heat exchange with outside, because flow-disturbing intensity is little, between copper pipe inwall place's refrigerant and copper pipe centre refrigerant, heat transmission is slow, thus cause the inner refrigerant of copper pipe and the hot heat exchange performance in the external world to decline, reduce the heat exchange performance of heat-transfer pipe.
Utility model content
The utility model causes refrigerant flow resistance to increase to solve screw thread in interior heat-transfer pipe of the prior art, the deficiency that in heat-transfer pipe, different parts refrigerant exchange rate is low, provide one and can effectively reduce refrigerant circulating resistance, improve the inner screw thread copper pipe structure of exchange rate between different parts refrigerant in copper pipe body.
To achieve these goals, the utility model adopts following technical scheme:
A kind of inner screw thread copper pipe structure, comprise copper pipe body, described copper pipe body inwall is provided with two groups of tooth ribs in spiral distribution, be respectively tooth rib I, tooth rib II, the rectangular in cross-section structure of described tooth rib I, the cross section of tooth rib II is triangular in shape, on the arbitrary cross section of copper pipe body, tooth rib I, tooth rib II place cambered surface respectively account for the half of circumference, and the angle β of described tooth rib I, tooth rib II and copper pipe body axis is 10 °-45 °.When steam flows in copper pipe body, tooth rib increases heat transfer surface area on the one hand, tooth rib has guiding function to steam simultaneously, steam is flowed along the hand of spiral, due to tooth rib I, the shape of tooth rib II is different, so just cause at copper pipe body arbitrary section place, tooth rib I, the resistance that steam in the corresponding semicircle of tooth rib II is subject to is different, thus form the different vapor stream of two plume speed, because the flow velocity of two strands of vapor streams is different, two strands of vapor streams mutually knock into the back and strengthen the flow-disturbing effect of refrigerant circumference, and then have the action of turbulent flow strengthening copper pipe body inside and middle part steam, impel between steam and realize heat balance fast, exchange rate between different parts refrigerant in raising copper pipe body, the refrigerant ensureing copper pipe body inwall place fast and the external world carry out heat exchange.
As preferably, described tooth rib I, the height of teeth top of tooth rib II reduce from Article 1 tooth rib successively to the last item tooth rib, the tooth that in the tooth that in tooth rib I, height of teeth top is maximum and tooth rib II, height of teeth top is minimum is adjacent, the tooth that in the tooth that in tooth rib I, height of teeth top is minimum and tooth rib II, height of teeth top is maximum is adjacent, in tooth rib I, maximum tooth is risen and is risen identical with maximum tooth in tooth rib II, and in tooth rib I, minimum tooth is risen and risen identical with minimum tooth in tooth rib II.When refrigerant flows in copper pipe body, centrifugal force is produced under the effect of helical tooth rib, tooth rib I, the height of teeth top of tooth rib II reduces successively, the line of tooth top be two sections with the circular arc of copper pipe body decentraction, this circular arc also has certain guiding function to refrigerant, when refrigerant flows along heat-transfer pipe inwall, it is not identical that it is positioned at arbitrarily angled suffered resistance, the different vapor stream of multiply speed can be formed in whole copper pipe body, mutually interfere between air-flow and form flow-disturbing, enhance the heat exchange between copper pipe body inner different spaces place refrigerant steam greatly, thus refrigerant steam-energy in guarantee copper pipe body and the external world carry out heat exchange to greatest extent.
As preferably, described copper pipe body inwall is also provided with and tooth rib I, helicla flute that tooth rib II rotation direction is contrary.Helicla flute effectively can reduce the circulating resistance of refrigerant on the one hand, can reduce the thickness of copper pipe body inner boundary layer (refrigerant of gas-liquid mixed state, liquid refrigerants can be fitted with copper pipe body inwall under the influence of centrifugal force and be formed boundary layer) on the other hand.
As preferably, described helicla flute rises place periphery for datum level with maximum tooth in tooth rib I, tooth rib II, equals the mean value of all tooth depths in tooth rib I bottom helicla flute to the distance of copper pipe body inwall.Due to tooth rib I, in tooth rib II, the height of teeth top of tooth is different, the helical tooth rib top only having height of teeth top to be greater than mean value just can form helicla flute, the helical tooth rib that height of teeth top is greater than mean value is large to refrigerant flow resistance, helicla flute can reduce this resistance targetedly, part refrigerant can carry out flowing across tooth rib from helicla flute, thus form some shallow bid adverse currents, interfere between adverse current and the following current higher than the tooth rib place of mean value and form turbulent flow, simultaneously shallow bid adverse current also impact teeth can rise the following current at the tooth rib place being less than mean value under the effect of inertia, thus diverse location place forms different azimuth in pipe, the flow-disturbing of angle, turbulent flow, between great raising refrigerant, refrigerant and extraneous heat exchanger effectiveness.
As preferably, in described copper pipe body, be also provided with expansion tube, between described expansion tube and copper pipe body, form annular chamber, in described expansion tube, be provided with some independently expansion chambers vertically.Refrigerant due to copper pipe body centre needs to carry out heat exchange by the refrigerant at inwall place and the external world, although this heat exchanger effectiveness is high, but the refrigerant being still less than inwall place is direct and the efficiency of heat exchange with outside, therefore center arranges expansion tube, refrigerant is flowed in annular chamber, increases refrigerant and the direct heat-exchange capacity in the external world; When high steam flows in copper pipe body, in order to ensure the compressive property of copper pipe body, tube wall is all thicker, and in this structure, expansion tube has the effect of releasing the pressure, when annular cavity pressure is excessive, expansion chamber can be squeezed, thus plays the effect alleviating super pressure, and the copper pipe body tube wall therefore in this structure is thin compared with normal heat transfer tubes, the thin path that can reduce heat trnasfer of tube wall, strengthens the heat exchange inside and outside copper pipe body.
As preferably, the outer position cover between adjacent two expansion chambers of expansion tube has adapter sleeve, is provided with some resiliency supported pin outside adapter sleeve.Expansion tube is outer all arranges adapter sleeve, resiliency supported pin every a segment distance, thus can keep the concentricity of expansion tube and copper pipe body to greatest extent, prevents expansion tube outer wall and copper pipe body contact internal walls.
As preferably, the external diameter of described expansion tube is the 2/5-3/5 of copper pipe body external diameter.
As preferably, described expansion tube is silicone tube, and described adapter sleeve, resiliency supported pin are made up of silica gel.Silicone tube has high temperature resistant, low temperature resistant, aging-resistant performance, long service life.
Therefore, the utility model has can effectively reduce refrigerant circulating resistance, to improve in copper pipe body exchange rate between different parts refrigerant thus strengthens the beneficial effect of copper pipe body internal-external heat exchange performance.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment 1.
Fig. 2 is the structural representation of embodiment 2.
Fig. 3 is that in embodiment 2, in copper pipe body, schematic diagram is launched in A-A face.
Fig. 4 is the structural representation of embodiment 3.
Fig. 5 is the sectional side view of embodiment 3.
Fig. 6 is expansion tube expansion structure schematic diagram in embodiment 3.
Fig. 7 is B place close-up schematic view in Fig. 5.
In figure: copper pipe body 1 tooth rib I2 tooth rib II 3 helicla flute 4 expansion tube 5 annular chamber 6 expansion chamber 7 adapter sleeve 8 resiliency supported pin 9 annular spacing groove 10 annular boss 11.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is further described:
Embodiment 1: a kind of inner screw thread copper pipe structure as shown in Figure 1, comprise copper pipe body 1, copper pipe body 1 inwall is provided with two groups of tooth ribs in spiral distribution, be respectively tooth rib I2, tooth rib II3, the rectangular in cross-section structure of tooth rib I, the cross section of tooth rib II is triangular in shape, with tube body inwall arc transition at the bottom of the tooth of tooth rib I, tooth rib II, the addendum angle of tooth rib II is fillet, on the arbitrary cross section of copper pipe body, tooth rib I, tooth rib II place cambered surface respectively account for the half of circumference, and the angle β of tooth rib I, tooth rib II and copper pipe body axis is 20 °, thus reduce refrigerant resistance.The resistance that refrigerant steam in the corresponding semicircle of tooth rib I, tooth rib II is subject to is different, thus form the different vapor stream of two plume speed, because the flow velocity of two strands of vapor streams is different, two strands of vapor streams mutually knock into the back and strengthen the flow-disturbing effect of refrigerant circumference, and then have the action of turbulent flow strengthening copper pipe body inside and middle part steam, impel between steam and realize heat balance fast, to improve in copper pipe body exchange rate between different parts refrigerant, ensure refrigerant in copper pipe body fast, fully and the external world carry out heat exchange.
Embodiment 2: a kind of inner screw thread copper pipe structure as shown in Figure 2, comprise copper pipe body 1, copper pipe body 1 inwall is provided with two groups of tooth ribs in spiral distribution, be respectively tooth rib I2, tooth rib II3, the rectangular in cross-section structure of tooth rib I, the cross section of tooth rib II is triangular in shape, on the arbitrary cross section of copper pipe body, tooth rib I, tooth rib II place cambered surface respectively accounts for the half of circumference, tooth rib I, the angle β of tooth rib II and copper pipe body axis is 30 °, tooth rib I, the height of teeth top of tooth rib II reduces from Article 1 tooth rib successively to the last item tooth rib, the tooth that in the tooth that in tooth rib I, height of teeth top is maximum and tooth rib II, height of teeth top is minimum is adjacent, the tooth that in the tooth that in tooth rib I, height of teeth top is minimum and tooth rib II, height of teeth top is maximum is adjacent, in tooth rib I, maximum tooth is risen and is risen identical with maximum tooth in tooth rib II, in tooth rib I, minimum tooth is risen and is risen identical with minimum tooth in tooth rib II, as shown in Figure 3, copper pipe body 1 inwall is also provided with and tooth rib I, helicla flute 4 that tooth rib II rotation direction is contrary, helicla flute 4 rises place periphery for datum level with maximum tooth in tooth rib I, tooth rib II, equals the mean value of all tooth depths in tooth rib I bottom helicla flute to the distance of copper pipe body inwall.
When refrigerant flows in copper pipe body, centrifugal force is produced under the effect of helical tooth rib, the height of teeth top of tooth rib I, tooth rib II reduces successively, the line of tooth top be two sections with the circular arc of copper pipe body decentraction, this circular arc also has certain guiding function to refrigerant, when refrigerant flows along heat-transfer pipe inwall, it is not identical that it is positioned at arbitrarily angled suffered resistance, the different vapor stream of multiply speed can be formed in whole copper pipe body, mutually interfere between air-flow and form flow-disturbing, enhance the heat exchange between copper pipe body inner different spaces place refrigerant steam greatly, the helical tooth rib top only having height of teeth top to be greater than mean value just can form helicla flute, the helical tooth rib that height of teeth top is greater than mean value is large to refrigerant flow resistance, helicla flute can reduce this resistance targetedly, part refrigerant can carry out flowing across tooth rib from helicla flute, thus form some shallow bid adverse currents, interfere between adverse current and the following current higher than the tooth rib place of mean value and form turbulent flow, simultaneously shallow bid adverse current also impact teeth can rise the following current at the tooth rib place being less than mean value under the effect of inertia, thus diverse location place forms different azimuth in pipe, the flow-disturbing of angle, turbulent flow, between great raising refrigerant, refrigerant and extraneous heat exchanger effectiveness.
Embodiment 3: a kind of inner screw thread copper pipe structure as shown in Figure 4, comprise copper pipe body 1, copper pipe body 1 inwall is provided with two groups of tooth ribs in spiral distribution, be respectively tooth rib I2, tooth rib II3, the rectangular in cross-section structure of tooth rib I, the cross section of tooth rib II is triangular in shape, on the arbitrary cross section of copper pipe body, tooth rib I, tooth rib II place cambered surface respectively accounts for the half of circumference, tooth rib I, the angle β of tooth rib II and copper pipe body axis is 45 °, tooth rib I, the height of teeth top of tooth rib II reduces from Article 1 tooth rib successively to the last item tooth rib, the tooth that in the tooth that in tooth rib I, height of teeth top is maximum and tooth rib II, height of teeth top is minimum is adjacent, the tooth that in the tooth that in tooth rib I, height of teeth top is minimum and tooth rib II, height of teeth top is maximum is adjacent, in tooth rib I, maximum tooth is risen and is risen identical with maximum tooth in tooth rib II, in tooth rib I, minimum tooth is risen and is risen identical with minimum tooth in tooth rib II, copper pipe body 1 inwall is also provided with and tooth rib I, helicla flute 4 that tooth rib II rotation direction is contrary, also be provided with expansion tube 5 in copper pipe body, the external diameter of expansion tube is 1/2 of copper pipe body external diameter, forms annular chamber 6 between expansion tube and copper pipe body, is provided with some independently expansion chambers 7 in expansion tube vertically.
As shown in Figure 5, the outer position cover between adjacent two expansion chambers of expansion tube 5 has adapter sleeve 8, some resiliency supported pin 9 are provided with outside adapter sleeve, resiliency supported pin outer end and copper pipe body contact internal walls support, thus the concentricity of basic guarantee expansion tube and copper pipe body, prevent expansion tube outer wall and copper pipe body contact internal walls, expansion tube is silicone tube, and adapter sleeve, resiliency supported pin are made up of silica gel; As shown in Figure 7, the junction that expansion tube outer wall is positioned at adjacent two expansion chambers is also provided with annular spacing groove 10, is provided with the annular boss 11 with annular stop slot fit, thus prevents adapter sleeve from sliding on expansion tube outer wall in adapter sleeve.As shown in Figure 6, when passing through vapours in copper pipe body, expansion chamber expanded by heating; the air pressure in annular chamber can be increased, strengthen the heat exchange inside and outside copper pipe body, when the air pressure in annular chamber is too large; expansion chamber can compress, thus reduces air pressure to the pressure of copper pipe body inwall, plays a protective role.Therefore, the utility model has can effectively reduce refrigerant circulating resistance, improves the beneficial effect of exchange rate between different parts refrigerant in copper pipe body.
Claims (8)
1. an inner screw thread copper pipe structure, comprise copper pipe body, it is characterized in that, described copper pipe body inwall is provided with two groups of tooth ribs in spiral distribution, is respectively tooth rib I, tooth rib II, the rectangular in cross-section structure of described tooth rib I, the cross section of tooth rib II is triangular in shape, on the arbitrary cross section of copper pipe body, tooth rib I, tooth rib II place cambered surface respectively account for the half of circumference, and the angle β of described tooth rib I, tooth rib II and copper pipe body axis is 10 °-45 °.
2. inner screw thread copper pipe structure according to claim 1, it is characterized in that, described tooth rib I, the height of teeth top of tooth rib II reduce from Article 1 tooth rib successively to the last item tooth rib, the tooth that in the tooth that in tooth rib I, height of teeth top is maximum and tooth rib II, height of teeth top is minimum is adjacent, the tooth that in the tooth that in tooth rib I, height of teeth top is minimum and tooth rib II, height of teeth top is maximum is adjacent, in tooth rib I, maximum tooth is risen and is risen identical with maximum tooth in tooth rib II, and in tooth rib I, minimum tooth is risen and risen identical with minimum tooth in tooth rib II.
3. inner screw thread copper pipe structure according to claim 2, is characterized in that, described copper pipe body inwall is also provided with and tooth rib I, helicla flute that tooth rib II rotation direction is contrary.
4. inner screw thread copper pipe structure according to claim 3, it is characterized in that, described helicla flute rises place periphery for datum level with maximum tooth in tooth rib I, tooth rib II, equals the mean value of all tooth depths in tooth rib I bottom helicla flute to the distance of copper pipe body inwall.
5. the inner screw thread copper pipe structure according to claim 1 or 2 or 3 or 4, it is characterized in that, also be provided with expansion tube in described copper pipe body, between described expansion tube and copper pipe body, form annular chamber, in described expansion tube, be provided with some independently expansion chambers vertically.
6. inner screw thread copper pipe structure according to claim 5, is characterized in that, the outer position cover between adjacent two expansion chambers of expansion tube has adapter sleeve, is provided with some resiliency supported pin outside adapter sleeve.
7. inner screw thread copper pipe structure according to claim 6, is characterized in that, the external diameter of described expansion tube is the 2/5-3/5 of copper pipe body external diameter.
8. inner screw thread copper pipe structure according to claim 7, is characterized in that, described expansion tube is silicone tube, and described adapter sleeve, resiliency supported pin are made up of silica gel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420855271.0U CN204388680U (en) | 2014-12-30 | 2014-12-30 | inner screw thread copper pipe structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420855271.0U CN204388680U (en) | 2014-12-30 | 2014-12-30 | inner screw thread copper pipe structure |
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| CN204388680U true CN204388680U (en) | 2015-06-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104654884A (en) * | 2014-12-30 | 2015-05-27 | 浙江耐乐铜业有限公司 | Internal threaded copper pipe structure |
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- 2014-12-30 CN CN201420855271.0U patent/CN204388680U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104654884A (en) * | 2014-12-30 | 2015-05-27 | 浙江耐乐铜业有限公司 | Internal threaded copper pipe structure |
| CN104654884B (en) * | 2014-12-30 | 2016-08-24 | 浙江耐乐铜业有限公司 | A kind of inner screw thread copper pipe structure |
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