CN102072683A - Heat transfer tube, heat exchanger, and heat transfer tube workpiece - Google Patents
Heat transfer tube, heat exchanger, and heat transfer tube workpiece Download PDFInfo
- Publication number
- CN102072683A CN102072683A CN2010105524325A CN201010552432A CN102072683A CN 102072683 A CN102072683 A CN 102072683A CN 2010105524325 A CN2010105524325 A CN 2010105524325A CN 201010552432 A CN201010552432 A CN 201010552432A CN 102072683 A CN102072683 A CN 102072683A
- Authority
- CN
- China
- Prior art keywords
- heat
- transfer pipe
- mentioned
- height
- maximum height
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention aims at providing a heat transfer tube, a heat exchanger, and a heat transfer tube workpiece advantaged by high exchange rate compared with structures with a certain corrugated groove depth and capability of reducing pressure loss. The heat transfer tube (1) is provided with: a main pipe (2) provided with an inner circumferential surface (2a) and an outer circumferential surface (2b); a spiral protruding part (31) formed at the inner circumferential surface (2a) of the main pipe (2) via a spiral corrugated groove (3) formed at the outer circumferential surface (2b), the inner circumferential surface (2a) of the main pipe (2) is provided with regions in which heights of the protruding part (31) respectively and periodically change.
Description
Technical field
The present invention relates to heat-transfer pipe, heat exchanger and heat-transfer pipe workpiece.
Background technology
Natural cooling agent heat pump water heater as water-coolant heat exchanger representative mainly is at the boiled hot water of spended times such as night, and the flow velocity of water is little, then is laminar flow on the whole as the classification of flowing.Under this condition,, must improve the heat transfer property of water pipe in order to improve the performance of heat exchanger.As heat-transfer pipe bellows (for example, with reference to patent documentation 1) is arranged corresponding to this.
The heat-transfer pipe of patent documentation 1 record has: be responsible for; It is certain and be formed at the wave groove of being responsible for inner peripheral surface to be formed at the person in charge's the outer peripheral face and the degree of depth; And the convex shaped part that forms by wave groove.
Patent documentation 1: TOHKEMY 2007-218486 communique.
Though but utilize the dark structure of the wave groove degree of depth can realize the high performance of heat exchange at the heat-transfer pipe of patent documentation 1 record, need obtain the occasion of the higher product of performance, if make the degree of depth of wave groove darker, then can increase the pressure loss.In addition, if for reducing the depth as shallow that the pressure loss makes wave groove, then the raising of heat transfer rate is not ideal enough.
Summary of the invention
Therefore, the object of the present invention is to provide that compare heat transfer rate with wave groove degree of depth certain structure high and can reduce heat-transfer pipe, heat exchanger and the heat-transfer pipe workpiece of the pressure loss.
The present invention possesses for achieving the above object: the person in charge with inner peripheral surface and outer peripheral face; And thereby by form the spiral helicine protuberance that spiral helicine wave groove is formed at inner peripheral surface at outer peripheral face, the person in charge's inner peripheral surface has the periodically variable zone of height of protuberance.
Above-mentioned heat-transfer pipe also can be the maximum height and the heat-transfer pipe of minimum constructive height to form in each all mode that occurs respectively of the protuberance of inner peripheral surface.
And, except that above-mentioned heat-transfer pipe, can also provide heat exchanger, this heat exchanger possesses: the position that is configured to the maximum height of protuberance more is positioned at the heat-transfer pipe of gravity direction than the position of minimum constructive height; And be configured in coolant hose in the heat-transfer pipe in the mode that contacts with the position of the maximum height of protuberance.
And, a kind of heat exchanger can also be provided, this heat exchanger possesses: the position that is configured to the maximum height of protuberance is positioned at the heat-transfer pipe of gravity direction than the position of minimum constructive height; And dispose coolant hose in the mode that contacts with the part corresponding to the position of the maximum height of protuberance of outer peripheral face.
And, can also provide above-mentioned heat-transfer pipe so that be formed with the heat-transfer pipe workpiece that the radius of curvature mode littler than the radius of curvature of the outer peripheral face of the position side of the maximum height that is formed with protuberance of outer peripheral face of position side of the minimum constructive height of protuberance carried out bending machining.
According to above-mentioned each structure, can high part realize improving heat transfer property at the height of the protuberance that forms by wave groove, on the other hand, can low part realize reducing the pressure loss at the height of the protuberance that forms by wave groove.
Description of drawings
Fig. 1 is the longitudinal sectional view of the heat-transfer pipe of first embodiment of the present invention.
Fig. 2 represents the example of manufacture method of the heat-transfer pipe of first embodiment of the present invention, and Fig. 2 (a) is the figure of expression first manufacture method, and Fig. 2 (b) is the figure of expression second manufacture method, and Fig. 2 (c)～(e) is the figure that expression is used for the plectane of the 3rd manufacture method.
Fig. 3 (a) is the figure that has used the heat pump water heater of the heat exchanger of representing second embodiment of the present invention, and Fig. 3 (b) is the longitudinal sectional view of heat exchanger 10.
Fig. 4 is the synoptic diagram of the heat exchanger 10 of the 3rd embodiment of the present invention.
Fig. 5 (a) is the longitudinal sectional view of the heat-transfer pipe 1 of the 4th embodiment of the present invention, and Fig. 5 (b) is the longitudinal sectional view of heat-transfer pipe workpiece 4.
Among the figure:
The 1-heat-transfer pipe, 2-is responsible for, 2a-inner peripheral surface, 2b-outer peripheral face, the 3-wave groove, 4-heat-transfer pipe workpiece, 5-plectane, 10-heat exchanger, the 11-coolant hose, 12-pressure reducer, 13-pipe arrangement, 14-heat dump, the 15-compressor reducer, 20-central shaft, 31-protuberance, 31a-maximum height position, 31b-minimum constructive height position, 50-plectane center, 51-rotating shaft, the distance of 52-rotating shaft and central shaft, 53-plectane benchmark radius, 100-heat pump water heater.
The specific embodiment
First embodiment
Fig. 1 represents the summary of longitudinal cross-section of the heat-transfer pipe of first embodiment of the present invention.This heat-transfer pipe 1 possesses: the person in charge 2 with inner peripheral surface 2a and outer peripheral face 2b; And thereby by form the spiral helicine protuberance 31 that spiral helicine wave groove 3 is formed at the person in charge 2 inner peripheral surface 2a at outer peripheral face 2b, the person in charge 2 inner peripheral surface 2a has the periodically variable zone of height of protuberance 31.
And " the height cyclically-varying of protuberance " is meant that the maximum height position of protuberance and minimum constructive height (comprising zero) position periodically go out terrain along protuberance respectively and change, and for example, also can week maximum occur by every n (n is an integer).In the present embodiment, n=1.
" the periodically variable zone of the height of protuberance " can also can be located at the part of removing two ends in the length range setting, also can be located at many places.In the present embodiment, in the length range setting.
In the present embodiment, periodically have the highest part, the maximum height position 31a (be called the maximum height position 31a of protuberance 31 later on or abbreviate maximum height position 31a as) of height of the protuberance 31 that is formed by wave groove 3, this height setting is Hc1.3 of the wave grooves of the outer peripheral face 2b corresponding with this part deepen.
On the other hand, periodically have minimum part, the minimum constructive height position 31b (be called the minimum constructive height position 31b of protuberance 31 later on or abbreviate minimum constructive height position 31b as) of height of the protuberance 31 that is formed by wave groove 3, this height setting is Hc2.3 of the wave grooves of the outer peripheral face 2b corresponding with this part shoal.
And maximum height Hc1, minimum constructive height Hc2 are according to defining apart from the height of being responsible for 2 inner peripheral surface 2a, need not consider to be responsible for 2 thickness (after, be also referred to as the thick Tw of diapire).
According to the reduced rate of being responsible for 2 the thick Tw of external diameter OD, diapire, imaginary flow regime, required pressure loss, can make minimum constructive height Hc2 is 0～0.1mm.Similarly, can make maximum height Hc1 is 0.3～0.5mm.And can make Hc2 and the ratio Hc2/Hc1 of Hc1 is 0～0.2.
And can make maximum height Hc1 and the ratio Hc1/OD of the person in charge's external diameter OD is 0.03～0.06, and to make minimum constructive height Hc2 and the ratio Hc2/OD of the person in charge's external diameter OD be 0～0.02.
In Fig. 1, on the person in charge 2, periodically form wave groove 3 as follows, the indeclinable occasion of height of the protuberance 31 of the part parallel with axle on the person in charge 2 inner peripheral surface 2a promptly, cut the occasion in a plurality of person in charges' 2 cross section in the mode of maximum height Hc1 that protuberance 31 occurs, identical part always becomes the highest.The protuberance 31 that is formed by wave groove 3 little by little changes to minimum constructive height Hc2 from maximum height Hc1.
One example of the concrete size of present embodiment is, being responsible for 2 external diameter OD is 9.53mm, and being responsible for 2 the thick Tw of diapire is 0.7mm, and maximum height Hc1 is 0.5mm, and minimum constructive height Hc2 is 0.1mm.
And, in the present embodiment, employing is at the maximum height position 31a with maximum height Hc1 and have the shape that the height that forms spiral helicine protuberance 31 between the minimum constructive height position 31b of minimum constructive height Hc2 reduces continuously or increases continuously, but between also can add height at the altitude range built-in between Hc1 and the Hc2.For example, can be purpose also with further raising heat transfer rate, form the higher part of a plurality of height at the periphery of the maximum height position 31a with maximum height Hc1.
In addition, the appearance cycle of maximum height Hc1 and minimum constructive height Hc2 also can be inequality.For example, the cycle of Hc1 is the twice in the cycle of Hc2, and the height H c3 of protuberance that is positioned at the centre of the Hc1 that is adjacent to each other also can be the height that satisfies Hc1＞Hc3 〉=Hc2.
Below, the material of heat-transfer pipe 1 etc. is described.
Heat-transfer pipe 1 is made of the good material of conductivity of heat.For example, can form by metals such as copper, copper alloy, aluminum or aluminum alloy.
Then, manufacture method is described.
Fig. 2 represents an example of the manufacture method of heat-transfer pipe 1.
First manufacture method
As first manufacture method, shown in Fig. 2 (a), discoid plectane 5 that ripple forms usefulness is pressed under the state that tilts with respect to the direction vertical with being responsible for 2 central shaft 20 on one side continuously is responsible for 2 rotations on one side, simultaneously in the revolution on every side of being responsible for 2, thereby and extract with the speed of regulation and to be responsible for 2 and can to form wave groove 3, wherein, this person in charge 2 by smooth tubes be relative tubular axis when vertically dissecing the section of inner peripheral surface be that the pipe of circle constitutes.
Promptly, the center 50 of discoid plectane 5 that ripple is formed usefulness is as the rotating shaft 51 of plectane, change as forming wave groove 3 above-mentionedly by distance 52, thereby can form the heat-transfer pipe 1 of the height change of protuberance 31 while the central shaft 20 that makes this rotating shaft 51 and be responsible for.
Here, the diameter of plectane 5 and angle of inclination can be by being responsible for 2 the speed of extracting, being responsible for the distance 52 of 2 external diameter OD, rotating shaft 51 and central shaft 20 and the wave groove spacing Pd that wishes decides.
Second manufacture method
Second manufacture method is shown in Fig. 2 (b), the rotating shaft 51 of the plectane 5 that corrugation uses is departed from from the center 50 of plectane, and under the state that this rotating shaft 51 is maintained fixed and makes plectane 5 tilt apart from the distance 52 of being responsible for 2 central shaft 20, be pressed into continuously on one side and be responsible for 2 rotations on one side with respect to the direction vertical with being responsible for 2 central shaft 20, simultaneously be responsible for 2 around revolution, thereby and extract with the speed of regulation and to be responsible for 2 and can to form wave groove.
The 3rd manufacture method
The 3rd manufacture method is that the shape of plectane 5 is used the circle method of shape in addition.For example, shown in Fig. 2 (c), the distance of use 2b one circle on the person in charge 2 outer peripheral face and half identical ellipticity plectane of the circumference of plectane, under the state that plectane 5 is tilted with respect to the direction vertical with being responsible for 2 central shaft 20, be pressed into continuously on one side when rotating shaft 51 and the distance 52 of being responsible for 2 central shaft 20 are maintained fixed and be responsible for 2 rotations on one side, simultaneously be responsible for 2 around revolution, thereby and extract with the speed of regulation and to be responsible for 2 and can to form wave groove.
In addition, shown in Fig. 2 (d), the part of the plectane 5 of use ripple formation usefulness is than the plectane 5 of the shape of benchmark radius 53 weak points of plectane, under the state that plectane 5 is tilted with respect to the direction vertical with being responsible for 2 central shaft 20, be pressed into continuously on one side when rotating shaft 51 and the distance 52 of being responsible for 2 central shaft 20 are maintained fixed and be responsible for 2 rotations on one side, simultaneously be responsible for 2 around revolution, thereby and extract with the speed of regulation and to be responsible for 2 and can to form wave groove.
Conversely, shown in Fig. 2 (e), a part of using ripple to form the plectane 5 of usefulness forms the plectane 5 than benchmark radius 53 length of plectane, be pressed into continuously on one side at the state that plectane 5 is tilted with respect to the direction vertical with being responsible for 2 central shaft 20 when rotating shaft 51 and the distance 52 of being responsible for 2 central shaft 20 are maintained fixed and be responsible for 2 rotations on one side, simultaneously be responsible for 2 around revolution, thereby and extract with the speed of regulation and to be responsible for 2 and can to form wave groove.
And, also can make up said method and form.For example, by making up first manufacture method and second manufacture method, thereby can make the higher structure of the processing graphic pattern free degree.
The following describes the effect of present embodiment.
In the high part of the height of protuberance 31, the periphery that promptly has the maximum height position 31a of maximum height Hc1, it is big that the stirring of water becomes, can improve heat transfer, on the other hand, in the low part of the height of protuberance 31, promptly have the periphery of the minimum constructive height position 31b of minimum constructive height Hc2, the increase of the pressure loss can be suppressed at Min..
And, when use (for example, the Reynolds coefficient is below 5000) near the little laminar flow of flow, can expect the raising of the coefficient of overall heat transmission that obtains by leading edge effect (anterior border effect).
Second embodiment
The structure of heat pump water heater of the heat exchanger of second embodiment of the present invention has been used in Fig. 3 (a) expression.
The following describes structure.
Heat pump water heater 100 is the devices that have the heat exchanger 10 of the heat-transfer pipe 1 that uses first embodiment and pass through thereby the water transmission is supplied with from the heat of coolant hose 11 hot water in this heat exchanger 10.In heat exchanger 10, passed through pipe arrangement 13 by the cooling agent of the cryogenic high pressure after capturing heat state with low-temp low-pressure in pressure reducer 12, in heat dump 14, become the state of high-temperature low-pressure, in compressor reducer 15, become the state of HTHP, turn back to heat exchanger 10 once more.
One example of the heat exchanger 10 of Fig. 3 (b) presentation graphs 3 (a).Heat exchanger 10 forms the inside of the heat-transfer pipe 1 of wave groove 3 in the mode of the maximum height Hc1 of protuberance 31 that occur to be responsible for 2 inner peripheral surface 2a with each week and minimum constructive height Hc2, promptly in the inside that forms the heat-transfer pipe 1 of wave groove 3 in the indeclinable mode of height that is parallel to the protuberance 31 of being responsible for the axle part on the 2 inner peripheral surface 2a, dispose and be used to coolant hose 11 that cooling agent is passed through.
Can use the smooth tubes of good material such as the thermal conductivity of utilizing copper or the pipe of band inner face groove etc. as coolant hose 11.And, also can use the pipe of leak detection function with the refrigerator oil that circulates to the cooling agent in the coolant hose 11 with cooling agent.For example, can use the coolant hose 11 that a plurality of leak detection path partly is set at the thickness of the pipe of smooth tubes or band inner face groove.This structure generally water in being by convection into heat-transfer pipe 1 requires the occasion of security, more particularly, and the cooling agent in not allowing coolant hose 11 and adopt to the occasion of heat-transfer pipe 1 internal leakage with the refrigerator oil that cooling agent circulates.
And in heat-transfer pipe 1, the maximum height position 31a with maximum height Hc1 is positioned at lowest part, promptly towards gravity direction.And, in heat-transfer pipe 1, insert coolant hose 11 as interior pipe.At this moment, coolant hose 11 is configured to contact with its underpart in heat-transfer pipe 1.Heat-transfer pipe 1 and coolant hose 11 are fixed by soldering at both ends.
In other words, coolant hose 11 is below its section, and with when heat-transfer pipe 1 contacts, the contact that is fixed to heat-transfer pipe 1 side becomes the maximum height position 31a with maximum height Hc1 in the inboard of heat-transfer pipe 1.
The following describes the effect of heat exchanger.
Cooling agent is flowed in as the coolant hose 11 of interior pipe, make water mobile in the space that forms by outer wall as the heat-transfer pipe 1 of outer tube and coolant hose 11.Because the distance between inner peripheral surface 2a and the coolant hose 11 is near, so there is contribution below (being gravity direction) to the heat exchange between the cooling agent of being responsible for water in 2 and coolant hose 11 in the heat-transfer pipe 1.In this part, owing to become the high part (periphery) of height of protuberance 31 with maximum height position 31a of maximum height Hc1, therefore water is stirred fully, and the effect that obtains with configuration by coolant hose interacts, can be further than the high maintenance heat transfer rate.
On the other hand, because the distance of top and coolant hose 11 is than the distance between below and the coolant hose 11 in the heat-transfer pipe 1 in the heat-transfer pipe 1, so the ratio of heat exchanging contribution is few.Therefore, make the protuberance 31 of aspect ratio heat-transfer pipe below of protuberance 31 low, thereby realize reducing the pressure loss.
The following describes the effect of present embodiment.
As implied above, the certain pipe of height of heat-transfer pipe 1 and smooth tubes, the protuberance that formed by wave groove is compared, and can improve from flowing in liquid in the pipe to the coefficient of overall heat transmission of pipe.Especially, as the water pipe of natural cooling agent heat pump water heater, when low discharge, the raising meeting of its performance is obvious.
And, in the common double-pipe exchange on being configured in concentric circles, guarantee that with interior the hollow that is held in outer tube is comparatively difficult, because gravity has the situation that can be positioned at the pipe below.At this moment, contact with interior pipe as the heat-transfer pipe 1 of outer tube and to hinder flowing of water, worry to involve the reduction of heat transfer rate and the urgency of the pressure loss increases.On the other hand, according to present embodiment,,, on the contrary can improve heat transfer rate so, also can not worry to make heat transfer rate to reduce even the inner peripheral surface of interior pipe and outer tube contacts owing to also form maximum height position 31b in the protuberance 31 with maximum height Hc1.Therefore, the state that can be in contact with it with interior pipe (that is, coolant hose 11) is in advance fixed.Thus, fixed structure is become simply, and, the pipe of long size can also be applicable to.
And, by forming this structure, thereby successfully brought into play " below heat-transfer pipe 1, improve heat transfer property, reduce the pressure loss up " this effect of repelling each other.Generally, the high structural thermal performance of height of the protuberance 31 that is formed by wave groove 3 uprises, but along with the height of the protuberance 31 that is formed by wave groove 3 uprises, the pressure loss also becomes greatly, causes the raising of heat transfer property and the pressure loss can not and deposit.Therefore, when considering the pressure loss, the height of adoptable protuberance 31 also produces limit.On the other hand, use the occasion of this structure, improve the heat transfer property that heat exchanger performance is improved the big part of contribution, contribute few part can suppress the rising of the pressure loss.
And, the strong occasion of wishing to reduce the pressure loss, worry to increase the occasion of the pressure loss when for example must adopt the thicker structure of the thick Tw of diapire as increasing external diameter OD, making the minimum constructive height Hc2 that is in from coolant hose 11 position far away is zero, and it is also passable not carry out groove processing in fact.
The 3rd embodiment
Fig. 4 represents the heat exchanger of the 3rd embodiment.The heat-transfer pipe of present embodiment be not the inboard that makes coolant hose 11 and heat-transfer pipe 1 in abutting connection with but with the outside adjacency of heat-transfer pipe 1.
That is, the outer peripheral face 2b of the below of coolant hose 11 and heat-transfer pipe 1 is in abutting connection with the ground setting.With the corresponding outer peripheral face 2b of maximum height position 31a of the protuberance 31 of heat-transfer pipe 1, promptly the position, deep of wave groove 3 contacts with coolant hose 11.Use the occasion of this structure,, therefore there is no need to have the leak detection path because coolant hose 11 can directly not contact with water.Thus, the pipe of general smooth tubes or band inner face groove can be adopted as coolant hose 11, can realize seeking the reduction of cost.
Here, " contact " also comprise occasion by configuration coolant hoses 11 such as the high parts of brazing material or other electric conductivity.
The 4th embodiment
Fig. 5 represents the example of manufacture method of the heat-transfer pipe workpiece of the 4th embodiment of the present invention.At first, the tubular axis that forms first embodiment is the heat-transfer pipe 1 of straight line.This heat-transfer pipe 1 is carried out bending machining and forms heat-transfer pipe workpiece 4 shown in Fig. 5 (b).It is littler than maximum height position 31a side radius of curvature after bending machining that bending machining forms minimum constructive height position 31b side.
Utilize this bending machining, the minimum constructive height position 31b of the little side of radius of curvature becomes than minimum constructive height Hc2 height, and the maximum height position 31a of the big side of radius of curvature becomes lower than maximum height Hc1.
If the height of the protuberance after the bending machining that will be corresponding with maximum height Hc1 before the bending machining and minimum constructive height Hc2 is set at Hc3 and Hc4 respectively, then get final product than the big mode of the difference of Hc3 and Hc4 and according to the height that the distance of the center of curvature after the distance bending machining forms the protuberance 31 that is formed by wave groove 3 in advance with changing with the difference of Hc1 and Hc2.The occurrence of Hc1 and Hc2 gets final product according to radius of curvature, the person in charge's 2 the thick Tw decision of external diameter OD, diapire.
And, when the height setting of the protuberance after bending machining that will be corresponding with the height H c1 of protuberance before the bending machining and Hc2 is Hc3 and Hc4, also can form
The following describes the effect of present embodiment.
Using common bellows, promptly, make the occasion of the similarly high heat-transfer pipe of the height of the protuberance before the bending machining, the protuberance of the part that radius of curvature is little after the bending machining can be too outstanding, can produce local turbulent flow.Therefore, cause the pressure loss too to increase thus.With respect to this, the heat-transfer pipe workpiece of present embodiment is in the little part of radius of curvature, promptly can be too not outstanding at the protuberance of the inboard of bending.
In addition, the occasion that the height of the protuberance before making bending machining is similarly low, the part that radius of curvature is big becomes smooth, and heat transfer rate worsens.With respect to this, in the heat-transfer pipe workpiece of present embodiment, because the big part of radius of curvature, promptly the protuberance in the Wan Qu outside keeps suitable height, therefore can keep heat transfer rate than the highland.
Embodiment 1
Below, the embodiment 1 of the 4th embodiment is described.As the heat-transfer pipe workpiece of embodiment 1, the heat-transfer pipe workpiece of comparative example 1,2, made the heat-transfer pipe workpiece that possesses the structure shown in the table 1 respectively.
The heat-transfer pipe workpiece 4 of embodiment 1 uses and forms the heat-transfer pipe 1 that the preceding height of bending machining is respectively the wave groove 3 of Hc1=0.1mm, Hc2=1.0mm, making Hc2 afterwards is that the little side of radius of curvature, Hc1 are that bending machining is implemented on the big side of radius of curvature ground, makes heat-transfer pipe workpiece 4.At this moment, height H c3 after the bending machining and the height of Hc4 are 0.5mm, become identical.
On the other hand, comparative example 1 uses the maximum height Hc1 of the protuberance before the bending machining and the heat-transfer pipe that minimum constructive height Hc2 as one man forms wave groove 3, implements bending machining and makes the heat-transfer pipe workpiece.And, as a comparative example 2, smooth tubes is carried out bending machining make the heat-transfer pipe workpiece.
Table 1
The smooth tubes of the embodiment 1 of table 2 expression table 1 and the heat transfer property of comparative example 1 is than (more precisely the performance with the heat-transfer pipe workpiece that is formed by smooth tubes of comparative example 2 compares) and the pressure loss.For heat transfer property K value representation.
Here, K value representation total heat conductivity (W/m of per unit area
2K) Biao Shi hot percent of pass.Here, expression is from the conduction easness (Den わ り pacify さ) of coolant hose 11 to the heat of water.About the pressure loss, an example of record absolute value.
Table 2 is continued on next page
Table 2
Can learn that by table 2 heat transfer property has improved 14% than the heat-transfer pipe workpiece of being made by smooth tubes (comparative example 2) in the heat-transfer pipe workpiece 4 of embodiment 1.On the other hand, the heat transfer property of comparative example 1 has improved 16% than the heat-transfer pipe workpiece of being made by smooth tubes (comparative example 2), if only see the raising this point of heat transfer property, has obtained roughly the same result.
On the other hand, for the pressure loss, the heat-transfer pipe workpiece of embodiment 1 is compared be inhibited five times result of the heat-transfer pipe workpiece of being made by smooth tubes (comparative example 2), and relative therewith, comparative example 1 must reach nine times result of the heat-transfer pipe workpiece of comparative example 2.
As mentioned above, because the pressure loss is excessive, can't adopt the heat-transfer pipe workpiece of comparative example 1 as can be known.On the other hand, it is more than 110% that the heat-transfer pipe workpiece of embodiment 1 reaches the K value and the pressure loss is below the 35KPa, comprehensive, has reduced the pressure loss when successfully having improved heat transfer property.
Claims (8)
1. a heat-transfer pipe is characterized in that,
Possess: the person in charge with inner peripheral surface and outer peripheral face; And
Thereby by forming the spiral helicine protuberance that spiral helicine wave groove is formed at above-mentioned inner peripheral surface at above-mentioned outer peripheral face,
The above-mentioned person in charge's inner peripheral surface has the periodically variable zone of height of raised part.
2. heat-transfer pipe according to claim 1 is characterized in that,
The maximum height of the protuberance of above-mentioned inner peripheral surface and minimum constructive height form in the mode that occurs in each week respectively.
3. heat-transfer pipe according to claim 2 is characterized in that,
In raised part, above-mentioned minimum constructive height Hc2 is 0～0.2 to the ratio Hc2/Hc1 of above-mentioned maximum height Hc1.
4. according to claim 2 or 3 described heat-transfer pipes, it is characterized in that,
The above-mentioned maximum height Hc1 and the above-mentioned person in charge's outer ratio Hc1/OD through OD is 0.03～0.06, and the ratio Hc2/OD of the above-mentioned minimum constructive height Hc2 and the above-mentioned person in charge's external diameter OD is 0～0.02.
5. a heat exchanger is characterized in that,
Possess: the position that is configured to the above-mentioned maximum height of raised part more is positioned at the described heat-transfer pipe of claim 2 of gravity direction than the position of above-mentioned minimum constructive height; And
Be configured in coolant hose in the above-mentioned heat-transfer pipe in the mode that contacts with the position of the above-mentioned maximum height of raised part.
6. a heat exchanger is characterized in that,
Possess: the position that is configured to the above-mentioned maximum height of raised part more is positioned at the described heat-transfer pipe of claim 2 of gravity direction than the position of above-mentioned minimum constructive height; And
The coolant hose that disposes in the mode that contacts with the part corresponding to the position of the above-mentioned maximum height of raised part of above-mentioned outer peripheral face.
7. a heat-transfer pipe workpiece is characterized in that,
The described heat-transfer pipe of claim 2 is carried out bending machining so that be formed with the radius of curvature mode littler than the radius of curvature of the outer peripheral face of the position side of the above-mentioned maximum height that is formed with raised part of outer peripheral face of position side of the above-mentioned minimum constructive height of raised part.
8. a heat-transfer pipe workpiece is characterized in that,
Claim 3 or 4 described heat-transfer pipes are carried out bending machining so that be formed with the radius of curvature mode littler than the radius of curvature of the outer peripheral face of the position side of the above-mentioned maximum height that is formed with raised part of outer peripheral face of position side of the above-mentioned minimum constructive height of raised part.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009-262553 | 2009-11-18 | ||
| JP2009262553A JP2011106746A (en) | 2009-11-18 | 2009-11-18 | Heat transfer tube, heat exchanger, and processed product of heat transfer tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102072683A true CN102072683A (en) | 2011-05-25 |
Family
ID=44031323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105524325A Pending CN102072683A (en) | 2009-11-18 | 2010-11-17 | Heat transfer tube, heat exchanger, and heat transfer tube workpiece |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2011106746A (en) |
| CN (1) | CN102072683A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102331116A (en) * | 2011-07-11 | 2012-01-25 | 上海科米钢管有限公司 | Condenser applying spiral arc-shaped heat exchange pipe |
| CN102331207A (en) * | 2011-07-11 | 2012-01-25 | 上海科米钢管有限公司 | Spiral arc-shaped heat exchange pipe and machining processes thereof |
| CN105222620A (en) * | 2015-10-20 | 2016-01-06 | 宁波迪源制冷科技有限公司 | There is the heat exchanger of pipe in segmented screw thread |
| CN106311877A (en) * | 2016-11-25 | 2017-01-11 | 西南石油大学 | Pit heat transfer tube roll-forming device |
| CN114206640A (en) * | 2019-10-23 | 2022-03-18 | 株式会社Uacj | Heat transfer double-layer pipe, inner pipe for heat transfer double-layer pipe, and method for manufacturing same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6041584B2 (en) * | 2012-01-16 | 2016-12-14 | 株式会社ササクラ | Vacuum evaporative fresh water generator |
-
2009
- 2009-11-18 JP JP2009262553A patent/JP2011106746A/en active Pending
-
2010
- 2010-11-17 CN CN2010105524325A patent/CN102072683A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102331116A (en) * | 2011-07-11 | 2012-01-25 | 上海科米钢管有限公司 | Condenser applying spiral arc-shaped heat exchange pipe |
| CN102331207A (en) * | 2011-07-11 | 2012-01-25 | 上海科米钢管有限公司 | Spiral arc-shaped heat exchange pipe and machining processes thereof |
| CN105222620A (en) * | 2015-10-20 | 2016-01-06 | 宁波迪源制冷科技有限公司 | There is the heat exchanger of pipe in segmented screw thread |
| CN105222620B (en) * | 2015-10-20 | 2017-04-05 | 宁波迪源制冷科技有限公司 | Heat exchanger with segmented screw thread inner tube |
| CN106311877A (en) * | 2016-11-25 | 2017-01-11 | 西南石油大学 | Pit heat transfer tube roll-forming device |
| CN106311877B (en) * | 2016-11-25 | 2017-11-14 | 西南石油大学 | A kind of pit heat-transfer pipe roll forming device |
| CN114206640A (en) * | 2019-10-23 | 2022-03-18 | 株式会社Uacj | Heat transfer double-layer pipe, inner pipe for heat transfer double-layer pipe, and method for manufacturing same |
| CN114206640B (en) * | 2019-10-23 | 2024-03-08 | 株式会社Uacj | Heat transfer double pipe, inner pipe for heat transfer double pipe, and method for manufacturing same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2011106746A (en) | 2011-06-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102072683A (en) | Heat transfer tube, heat exchanger, and heat transfer tube workpiece | |
| EP2354743A2 (en) | Double-pipe heat exchanger | |
| CN109737793B (en) | Bionic wave type fin for air conditioner heat exchanger | |
| KR101717072B1 (en) | Heat transfer tube and method for manufacturing heat transfer tube | |
| US20220011050A1 (en) | Double tube for heat-exchange | |
| CN103261829B (en) | Shell-and-tube heat exchanger | |
| JP2006242529A (en) | Heat transfer pipe | |
| CN102301197A (en) | Heat exchanger | |
| CN101004336A (en) | Female screw heat-transfer pipe | |
| CN104870926A (en) | Evaporation heat transfer tube with a hollow cavity | |
| CN104848726A (en) | Multi-head spiral section tube and multi-head spirally-fluted heat exchange tube | |
| CN104296583B (en) | Female screw heat-transfer pipe | |
| JP2005257160A (en) | Heat transfer pipe with grooved inner surface and heat exchanger using the heat transfer tube with grooved inner surface | |
| CN1624412A (en) | Boiling heat-transfer tube and making method thereof | |
| CN107709792A (en) | The return stream forming portion and centrifugal compressed machinery of centrifugal compressed machinery | |
| CN101813433B (en) | Enhanced heat transfer tube for condensation | |
| JP2011021844A (en) | Inner face grooved heat transfer tube and cross fin tube type heat exchanger for evaporator | |
| JP2008267625A (en) | Heat transfer tube for falling liquid film-type refrigerating machine and its manufacturing method | |
| JP5289088B2 (en) | Heat exchanger and heat transfer tube | |
| US20190120567A1 (en) | Heat exchanger tube | |
| JP2008249163A (en) | Heat exchanger for supplying hot water | |
| CN210833199U (en) | Heat exchange tube, heat exchanger and heat exchange system | |
| CN100554856C (en) | A kind of intensify heat transfer pipe | |
| CN104246409A (en) | Fnned tube heat exchanger | |
| JP2010019489A (en) | Heat transfer pipe with inner helical groove for evaporator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110525 |