CN1091244C - Heat transfer tube for absorber - Google Patents
Heat transfer tube for absorber Download PDFInfo
- Publication number
- CN1091244C CN1091244C CN98100084A CN98100084A CN1091244C CN 1091244 C CN1091244 C CN 1091244C CN 98100084 A CN98100084 A CN 98100084A CN 98100084 A CN98100084 A CN 98100084A CN 1091244 C CN1091244 C CN 1091244C
- Authority
- CN
- China
- Prior art keywords
- valley area
- trough valley
- pipe
- heat
- trough
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
Abstract
The invention provides a heat transfer tube for an absorber which promotes an absorbing performance largely. On an outer surface of a metal tube having an outer diameter of D, a group of N (N is a natural number) number of trough portions, wherein the length L1 in a longitudinal direction of the tube is 70 mm<=L1<=130 mm, and the depth H is 0.23 mm<=H<0.5 mm, is formed on a circumference of a circle formed in section of the tube in the case of being cut perpendicular to a longitudinal direction of the tube so that the pitch P (= pi D/N) is set in the range of 6.2 to 8.7 mm, said group of trough portions being formed in plural in a longitudinal direction of the tube, and said group of trough portions adjacent to the longitudinal direction of the tube being arranged so that the ends of each trough portion are entered each other.
Description
The present invention relates to a kind of absorber heat-transfer pipe that improves absorbent properties, a plurality of grooves peak district and trough valley area are set on the outer surface of this pipe, can be used for absorption heat exchahger, for example the absorber of absorbing type refrigerator, absorption cooling and heat supply machine.
At absorption heat exchahger, for example in the absorbing type refrigerator, this heat exchanger inside keeps vacuum state, and refrigerant evaporates at low temperatures, removes the cold water of latent heat refrigeration by evaporation, and confession air-conditioning etc. are as cooling water.
Absorber and evaporator bank are contained in the casing.For continuous evaporation, the refrigeration steam that in evaporimeter, produces, the absorption liquid that is dispersed in the tube surface of absorber absorbs, and makes and keeps certain vacuum in the casing.Therefore,, must improve the generation of refrigerant vapor in the evaporimeter, also promptly improve absorption efficiency for improving the freezing capacity of absorbing type refrigerator and absorption cooling and heat supply machine.For improving absorption efficiency, the performance of improving heat-transfer pipe is an efficient and simple method.Researched and proposed the heat-transfer pipe of different shape.
For example, the practical new case of Japan goes out to be willing to that bulletin flat 2-89270 (Japanese UtilityModel Application Laid-Open No.Hei2-89270) and Japan specially permit out hope and announces flat 2-176378 (Japanese Patenl Applicalion Laid-OpenNo.Hei2-176378) and propose the continuous axial groove to be set at heat-transfer pipe on axially, and with the rectangular direction of tubular axis on form groove peak district and trough valley area, this groove peak district and trough valley area have and give the curvature of deciding relation.
Above-mentioned technical characterstic is the waveform that does not influence the axial absorption liquid that is produced by the Marangoni convection current; And, when absorption liquid flows to trough valley area by groove peak district, obtain further eddy current effect.
In addition, a practical new case 46-67080 (Japanese Utility ModelPublication No.46-67080) of the day disclosure and a day disclosure are speciallyyed permit the technology that flat 5-22838 (Japanese Patent Publication No.Hei5-22838) is proposed, be that discontinuous groove peak district and trough valley area are set on heat-transfer pipe, the groove peak district and the trough valley area that are characterized in discontinuous are disturbed absorption liquid, and the absorption liquid time of staying is prolonged.
Though above-mentioned technology can make heat transfer property obtain to a certain degree improvement, has the following problem.At first, the heat-transfer pipe of continuous groove is set on the tube axial direction, the difference of its heat transfer property depends on the installation direction of pipe.
Particularly, if heat-transfer pipe is mounted to trough valley area when being positioned at vertically upward direction, absorption liquid can be trapped in the trough valley area, makes absorption liquid be difficult for discharging.Therefore, the lowered absorption liquid of absorption efficiency is stranded in trough valley area, and heat transfer property is reduced; When tool increased when the absorption liquid flow velocity, absorption liquid 5 oozed sometimes in the lower channel peak district of pipe, and this also can make heat transfer property reduce.In order to prevent these adverse effects, heat transfer tube group in a row can be laid, and make groove peak district upwards.Under these circumstances, when inserting heat-transfer pipe in the refrigerator, need guarantee the direction that pipe is arranged in order, bring very big burden to operating personnel.
If the pipe thickness of heat-transfer pipe reduces, when member was installed to tube sheet, heat-transfer pipe can be twisted and warped, and the distribution of absorption liquid is worsened, and often reduced absorbent properties.
If the degree of depth of trough valley area deepens, the hold-up of absorption liquid increases, and the internal circulating load that then drives the required absorption liquid of refrigerant cycles just increases, and the weight of complete machine is also increased.
The heat-transfer pipe that the practical new case 46-67080 of the day disclosure is proposed is provided with the discontinuous trough valley area.For shown in Figure 6, surrounding edge interruption at pipe is provided with trough valley area 8, constitute trough valley area group in a row, row's trough valley area is different from phase adjacent row slot paddy district in the position of periphery in the position of periphery, and to make trough valley area every a row encircle on the circumferencial direction be equitant in the cloth position of trough valley area 8.Yet, in this conventional heat-transfer pipe, be provided with trough valley area from axially seeing, a kind of similar netted zone is arranged; Therefore, when the refrigeration steam is absorbed when the Marangoni convection current occurring, the absorption liquid that flows downward produces with ribbon, and flows down in the axial direction fluctuation of pipe.Thereby for shown in Figure 6, absorption liquid does not flow to trough valley area, causes the absorption liquid delay insufficient, and absorbent properties can not get improving.
Day disclosure is speciallyyed permit the improvement that flat 5-22838 is the aforementioned day practical new case heat transfer tube configuration that 46-67080 proposes of the disclosure, but following problem is arranged.This day disclosure is speciallyyed permit the heat-transfer pipe that flat 5-220838 proposes, and its structure is that absorption liquid can be stranded on the surface of pipe as far as possible for a long time, the groove peak district that absorption liquid is provided with without interruption, but flow down along the peak-to-peak flat region of groove.
Structure is the holdup time that might prolong absorption liquid as mentioned above, and increases the hold-up of absorption liquid, but since the absorption liquid that on tube-surface, is detained more than requirement; As previously mentioned, the internal circulating load of absorption liquid is increased, thereby increase the weight of equipment.In addition, because of the flow path of absorption liquid is by the trough valley area decision, absorption liquid also flows down without the groove jag part, and the groove jag part contact with absorption liquid, underuses so the hot side of heat-transfer pipe amasss, and makes the raising of heat transfer property be subjected to certain limitation.
In view of the foregoing, the inventor has proposed a kind of absorber heat-transfer pipe, when this heat transfer tube group is loaded on refrigerator, can further improve heat transfer property, and improve its practicality (Japan speciallys permit out hope and announces flat 8-159605 Japanese Patent ApplicationLaid-Open No.Hei8-159605).
By above-mentioned in first to file, propose a kind of a plurality of heat-transfer pipe level and be installed on absorber heat-transfer pipe in the absorber, be characterized on the ring circumferencial direction of heat-transfer pipe in adjacent row's trough valley area that a center between center of row's trough valley area and another row's trough valley area coincides on pipe axial.In adjacent one another are respectively the arranging in the trough valley area of heat transfer pipe ring circumferencial direction, the length of trough valley area intersection is L
0, to trough valley area L
1Ratio, L
0/ L
1, be set at 0.2 to 0.8; Trough valley area ring circumferencial direction width W
1, and the ring circumferencial direction width W in the groove peak district between the trough valley area
2, it compares W
1/ W
2Be set at 0.5 to 2.5; The degree of depth h of trough valley is set at 0.5 to 1.5mm; The length L of trough valley area is set at 10-50mm.
Like this absorber heat-transfer pipe of configuration is to arrange like this along the axially extended discontinuous trough valley area of pipe, promptly one arranges the length of trough valley area and the length ratio of adjacent another emissions groove paddy area overlapping has a predetermined value.As previously mentioned, pipe axially on have in the cannelure sewer pipe of continuous groove because the installation direction difference of pipe, it is inhomogeneous heat transfer property to occur.Yet, have the absorber heat-transfer pipe that is interrupted trough valley area, there is not directional problems, even the upper face of pipe is lined up required direction, also show given basically conductivity of heat.
In addition, this heat-transfer pipe does not form absorption liquid constant current footpath really, but absorption liquid even wetting tube wall when dirty, so can obtain good absorbent properties.
Though can reach desirable target by above-mentioned absorber in first to file with heat-transfer pipe, the hold-up of absorption liquid on tube-surface is less, absorbent properties may not be abundant, therefore, wishes to develop the absorber heat-transfer pipe with better absorbent properties.
The present invention has overcome the problem of above-mentioned existence.The object of the invention provides a kind of absorber heat-transfer pipe, and in this heat-transfer pipe, absorption liquid is big in the hold-up of tube surface trough valley area, and the absorption liquid that is detained is thin and is dispersed in tube surface widely, thereby absorbent properties are greatly improved.
Absorber heat-transfer pipe provided by the invention is characterized in that, is on the metal tube outer surface of D at overall diameter, when the axial direction perpendicular to heat-transfer pipe cuts, in the circumferential edge of the face of pipe, the trough valley area of one group of N number (N is a natural number) is set, in the tubular axis trough valley area length L that makes progress
1Be 70mm≤L
1≤ 130mm, the trough valley area depth H is 0.23mm≤H＜0.5mm, and makes trough valley be set in 6.2 to 8.7mm scopes apart from P (=π D/N), described trough valley area group be pipe axially on many groups be provided with; And described along the adjacent trough valley area group of tube axial direction, be the two ends insertion interlaced with each other of being arranged to make each trough valley area.
With in the heat-transfer pipe, set W at this absorber
1Be on perpendicular to tube axial direction, the width of the described trough valley area that the metal tube outer surface forms is set W
2Be when the time perpendicular to the axial cutting of heat-transfer pipe, the width in the groove peak district that forms between each trough valley area on the section periphery of pipe on the direction vertical with pipe, its best satisfies scope and is: 0.5≤W
1/ W
2≤ 2.5.In addition, set L
2For pipe axially on, the interlaced length of trough valley area group of each adjacency, its best satisfies scope and is: 0≤L
2/≤W
1≤ 1.2.
The absorber of said structure flatly is installed in the vacuum tank with heat-transfer pipe, and when absorption liquid flows down when carrying out heat exchange perpendicular to the axial direction of heat-transfer pipe, water vapour is absorbed in the absorption liquid of tube surface.Use in the heat-transfer pipe at this absorber, on the outer surface of metal tube by the trough valley area that gives measured length of tube axial direction setting, can suppress absorption liquid and flow out, and upwards disperse absorption liquid, absorb the necessary wetting areas of water vapour to increase at tubular axis at the ring circumferencial direction of pipe.Therefore, have the heat-transfer pipe of this trough valley area, its absorbent properties are good.
Absorption liquid is stranded in the trough valley area of metal tube outer surface, makes absorption liquid concentration even owing to strength of fluid is different, the Merahgonl convection current can occur in stagnant liquid, thereby keeps the absorption efficiency to water vapour.The delay of absorption liquid further improves the performance of absorber.
Because trough valley area is separated out by predetermined length on metal tube is axial, partially absorb liquid from what metal tube flowed down, interval in trough valley area length is separated out, so unlikely generation is because the dirty skew of liquid that metal tube causes on problems such as setting angle, twist and warping.Therefore, even heat-transfer pipe is when install using with the multi-stag level, and also reason heat-transfer pipe installation site does not cause performance difference, thereby has improved the performance of absorber.
The summary of figure
Fig. 1 is the absorber of an embodiment of the invention heat-transfer pipe side view;
Fig. 2 is the partial enlarged drawing of Fig. 1;
Fig. 3 is along the cutaway view of 3-3 line among Fig. 2;
Fig. 4 (a) is along the cutaway view of 4-4 line among Fig. 2;
Fig. 4 (b) is the partial enlarged drawing of Fig. 4 (a);
The schematic diagram of the state that oozes appears in Fig. 5 for absorption liquid in the conventional heat-transfer pipe;
Fig. 6 flows down the schematic diagram of state for absorption liquid in the conventional heat-transfer pipe;
Fig. 7 is L
1And the graph of a relation between the freezing capacity ratio;
Fig. 8 is the graph of a relation between H and the freezing capacity ratio;
Fig. 9 is the graph of a relation between P and the freezing capacity ratio;
Figure 10 is W
1/ W
2And the graph of a relation between the freezing capacity ratio;
Figure 11 is L
2/ W
1And the graph of a relation between the freezing capacity ratio.
Now in conjunction with the accompanying drawings, describe most preferred embodiment of the present invention in detail.Fig. 1 is the unitary side view of the absorber of the embodiment of the invention with heat-transfer pipe.Fig. 2 is the partial enlarged drawing of Fig. 1.Fig. 3 and 4 is respectively along the cutaway view of 3-3 line and 4-4 line among Fig. 2.As shown in Figure 1,, press the axial setting area 3 respectively and the zone 4 of pipe, and in the zone 3 groove peak district and trough valley area are arranged, groove peak district and trough valley area are not set in the arch smooth domain 4 at the outer surface of metal tube.Groove peak and trough valley area can almost be arranged at whole areas of metal tube, and smooth domain 4 only is arranged in the very short zone of the two ends of metal tube and central part.Heat-transfer pipe is to be installed on the tube sheet by smooth domain 4, or on the equipment of refrigerator and so on.Smooth areas can be installed on the position that is equivalent to the refrigerator baffle plate.Simultaneously, the gap between tubesheet holes and the pipe can be done very for a short time, in the time of can suppressing refrigerator work, because vibration causes the abrasion that the phase mutual friction between tube-to-tube sheet connection causes.
As shown in Figure 2, in groove peak and trough valley zone 3, at interval trough valley area 1 is set by fixed on the pipe ring circumferencial direction, trough valley area 1 is L along tubular axis to development length
1Constitute one group of trough valley area by one group of a plurality of (N) trough valley area that on the ring circumferencial direction of pipe, is provided with 1.Pipe axially on many group trough valley areas are set.Adjacent trough valley area group is like this configuration, promptly in staggered a little each trough valley area 1 that enters in another group trough valley area in centre position of each trough valley area 1 in one group of trough valley area.The trough valley area 1 staggered length that enters is L between the two adjacent groups trough valley area
2
Shown in Fig. 3,4 cut-away view, the zone that does not form trough valley area 1 is the annular outer ring before the processing trough valley area; And after the processing trough valley area, the zone of described no trough valley area then forms a kind of outer rim of protrusion.On the other hand, trough valley area 1 degree of depth of garden perimeter surface outside is H, but in contrast to annular neighboring part, and in interior garden perimeter surface, trough valley area is projecting inward to pipe with the height of H.
The width of trough valley area 1 (girth on the pipe outer shroud circumferencial direction) is set to W
1, be set to W at the width (girth of pipe outer shroud circumferencial direction) in the groove peak district 2 that forms between each trough valley area 1 on the pipe outer shroud circumferencial direction
2In addition, along on the ring circumferencial direction of pipe appearance, the paddy of trough valley area 1 is apart from being set to P (=π D/N).W
1And W
2Be defined as follows: shown in Fig. 4 (b), dotted line is represented the circumcircle of groove peak district and trough valley area.Shown in Fig. 4 (a), this circumscribed diameter is D.The camber line of trough valley area 1 extends with circumcircle and forms two intersection points, and the arch length of trough valley 1 is defined as W between the intersection point
1, the arch length in groove peak district 2 is defined as W between two intersection points
2
First characteristics of the present invention are increase absorption liquid hold-ups at trough valley area 1, and disperse absorption liquid at tube outer surface as much as possible, thereby the thin liquid film of wider scope ground formation one deck, with raising liquid absorption, thereby improve absorbent properties.So length L of trough valley area 1 among the present invention
1, should satisfy following formula (1):
70mm≤L
1≤130mm (1)
In first to file, L
1Be located at the 10-50mm scope, this has just reduced the holdup time of absorption liquid at trough valley area, and has reduced the internal circulating load of absorption liquid.In the present invention, L
1Be located in the above-mentioned defined scope, the time that makes absorption liquid be trapped in trough valley area 1 increases as much as possible, and the absorption of liquid is improved, thereby improves its absorbent properties.But if L
1Surpass 130mm, skew appears in dirty absorption liquid, has then reduced absorbent properties.On the other hand, if L
1Less than 70mm, the hold-up of absorption liquid reduces, and also can reduce absorbent properties.Therefore must satisfy the condition of formula (1).
Secondly, the depth H of trough valley area 1 need be satisfied with following formula (2):
0.23mm≤H＜0.5mm (2)
The depth H of trough valley area 1 is defined in formula (2) scope, and then absorption liquid might suitably be detained in trough valley area 1, and improves the moisture dispersibility of tube outer surface, with the thin liquid film of formation one deck, thus the absorbent properties of raising absorption liquid.If depth H rises above 0.5mm, the liquid film of tube outer surface thickens, so that can penetrate heat by the width of cloth on the liquid film surface, and the heat transmission resistance that liquid film causes increases, thereby has reduced absorbent properties.On the other hand, if depth H is less than 0.23mm, the holdup time of absorption liquid is very short, thus absorption liquid not by desired absorb just dirty.Therefore, groove district depth H is arranged on 0.23mm≤H＜0.5mm scope.
Again secondly, need satisfy following formula (3) along the paddy on the pipe outer shroud circumference apart from P (=π D/N) at the trough valley area 1 on the pipe neighboring:
6.2mm≤P≤8，7mm (3)
Apart from less than 6.2mm the time, trough valley area is excessive relatively, is difficult to form thin liquid film along the paddy on the pipe outer shroud circumferencial direction for trough valley area 1 on outer perimeter.On the other hand, if P surpasses 8.7mm, level and smooth district increases, and produces the area decreases of absorption liquid convection current, causes the absorbent properties of absorption liquid to reduce.Therefore, the paddy on the neighboring of trough valley area 1 is set in 6.2 to the 8.7mm scopes apart from P.
The width W of trough valley area 1
1Width W to groove peak district
2Ratio W
1/ W
2, preferably satisfy following formula (4):
0.5mm≤W
1/W
2≤2.5mm (4)
Work as W
1And W
2Width when satisfying formula (4), then absorption liquid can be detained fully, and the appropriate pressure loss of cold water in the holding tube.If W
1/ W
2Surpass 2.5, then to be the flow path area of plumb cut too small with tubular axis, and then the pressure loss of cold water increases in the pipe.Because be to carry cold water with electric pump, the pressure loss increases, and just needs powerful pump, and the comprehensive efficiency of complete machine is reduced.On the other hand, or W
1/ W
2Less than 0.5, absorbent properties have then been reduced because of the absorption liquid hold-up is not enough.
Second characteristics of the present invention are to have shortened the trough valley area 1 staggered length L of inserting
2, be W at the width of trough valley area 1
1The time, the number that trough valley area 1 can be set on the pipe outer shroud circumferencial direction is increased; Therefore, the hold-up of absorption liquid increases on the tube-surface, thereby promotes the Marangoni convection current, improves absorbent properties.
According to the present invention, the width on the pipe excircle direction of trough valley area 1 is W
1The time, the trough valley area 1 staggered length L of inserting
2Should satisfy following formula (5):
0≤L
2≤1.2W
1 (5)
When trough valley area 1 width is W
1The time, the staggered length L of inserting of trough valley area
2Determine by formula (5).Therefore, trough valley area 1 width W
1Can widen groove peak district 2 width W
2Can narrow down, thereby the groove peak district number on the ring circumferencial direction is increased.
If L
2Surpass 1.2W
1The time, on the ring circumferencial direction paddy of trough valley area 1 apart from becoming big so that the decreased number of trough valley area, perhaps make adjacent trough valley area pipe axially on connect, thereby reduce the absorption of stagnant liquid.On the other hand, if L
2Less than 1.2W
1The time, above-mentioned phenomenon is opposite, and the paddy of trough valley increases the trough valley area number apart from narrowing down on the ring circumferencial direction.
In first to file, L
2With respect to L
1But fixed, and L
2/ L
1Be arranged on the 0.2-0.8mm scope.This moment, the hold-up of absorption liquid increased.But its weak point is that the staggered insertion of trough valley area is long, causes on the ring circumferencial direction more trough valley area can not be set.If L
2Long, L
2/ L
1Surpass 0.3, the result is W
1＜W
2Thereby, more trough valley area can not be set, and the narrowed width of trough valley area.Work as L
2/ L
1Surpass at 0.3 o'clock, for enough trough valley areas are provided, must make W1 enough little, and the paddy distance of trough valley area is also enough little on the ring circumferencial direction, the result reduces the hold-up of trough valley area absorption liquid, does not reach high absorbent properties.This is its shortcoming.
Trough valley area 1 is set in above-mentioned number range the time, the hold-up of absorption liquid increases on the tube-surface, promotes the Marangoni convection current, and absorbent properties strengthen.
It should be noted to comprise compo pipe by the metal tube that constitutes heat-transfer pipe among the present invention, and various metal tubes or compo pipe; The compo pipe of copper pipe or aluminum pipe and copper aluminium for example, perhaps also available steel pipe.
Embodiment
At this, contrast is different from comparative example of the present invention, describes effect of the present invention.
Table 1 is listed experiment condition
Table 1
Absorption chamber internal pressure 6.0 millimetress of mercury
Solution entrance concentration 63% (weight)
55 ℃ of solution inlet temperatures
Cooling water flow velocity 1.50 meter per seconds
32.0 ℃ of cooling water inlet temperatures
Liquid film flow rate 0.017-0.035 kilogram/rice. second
The surfactant 2-Ethylhexyl Alcohol
Following table 2 and 3 is listed the shape and size of heat-transfer pipe in embodiment and the comparative example.About numerical value is numerical value used in Fig. 2 and 4.
Table 2
| Numbering | D | Thickness of pipe wall | L1 | L2/W1 | P | H | W1/ | |
| Embodiment | ||||||||
| 1 2 3 | 15.88 19.05 22.23 | 0.7 0.7 0.7 | 95 90 97 | 0.60 0.60 0.60 | 6.24 6.65 6.98 | 0.41 0.41 0.40 | 1.5 1.5 1.49 | |
| Comparative example | 4 5 6 | 15.88 19.05 19.05 | 0.7 0.7 0.7 | 65 135 95 | 0.60 0.60 0.6 | 6.24 5.54 9.97 | 0.41 0.51 0.41 | 1.5 1.5 1.5 |
| Embodiment | 7 8 9 10 | 19.05 19.05 19.05 19.05 | 0.7 0.7 0.7 0.7 | 72 128 90 90 | 0.60 0.60 0.60 0.60 | 6.64 6.64 6.64 6.64 | 0.41 0.39 0.24 0.49 | 1.5 1.5 1.5 1.5 |
| Comparative example | 11 12 | 19.05 19.05 | 0.7 0.7 | 90 90 | 0.60 0.60 | 6.64 6.64 | 0.21 0.50 | 1.5 1.5 |
| Embodiment | 13 14 15 | 19.05 19.05 19.05 | 0.7 0.7 0.7 | 94 94 94 | 0.60 0.60 0.60 | 7.84 8.55 6.34 | 0.39 0.39 0.39 | 1.5 1.5 1.5 |
Table 3
| Numbering | D | Thickness of pipe wall | L1 | L2/W1 | P | H | W1/W2 | |
| Comparative example | 16 17 | 19.05 19.05 | 0.7 0.7 | 94 94 | 0.60 0.60 | 5.98 8.73 | 0.39 0.39 | 1.5 1.5 |
| Embodiment | 18 19 | 19.05 19.05 | 0.7 0.7 | 90 90 | 0.60 0.60 | 6.65 6.65 | 0.41 0.41 | 2.4 0.6 |
| Comparative example | 20 21 | 19.05 19.05 | 0.7 0.7 | 90 90 | 0.60 0.60 | 6.65 6.65 | 0.41 0.41 | 2.7 0.4 |
| Embodiment | 22 23 | 19.05 19.05 | 0.7 0.7 | 91 91 | 1.10 0 | 6.65 6.65 | 0.41 0.41 | 1.5 1.5 |
| Comparative example | 24 25 | 19.05 19.05 | 0.7 0.7 | 91 - | 1.3 - | 6.65 - | 0.41 - | 1.5 - |
Following table 4 is to table 8, is listed in evaporimeter freezing capacity in the heat-transfer pipe of embodiment and comparative example than (with the smooth plate contrast).Draw the data of table 4 among Fig. 7 to 11 to table 8.
Table 4
| Numbering | L1 | Evaporimeter freezing capacity ratio with the plain tube contrast | |
| Comparative example EXAMPLE Example EXAMPLE Example comparative example embodiment comparative example | 4 7 2 1 3 6 8 5 | 65 72 90 95 97 95 128 135 | 1.01 1.1 1.19 1.19 1.18 1.01 1.15 0.97 |
Table 5
| Numbering | H | Evaporimeter freezing capacity ratio with the plain tube contrast | |
| Comparative example EXAMPLE Example EXAMPLE Example comparative example | 11 9 8 2 10 12 | 0.21 0.24 0.39 0.42 0.49 0.5 | 0.93 1.18 1.15 1.18 1.17 1 |
Table 6
| Numbering | P | Evaporimeter freezing capacity ratio with the plain tube contrast | |
| Comparative example EXAMPLE Example EXAMPLE Example EXAMPLE Example comparative example | 16 15 9 2 7 13 14 17 | 5.98 6.34 6.64 6.65 6.64 7.48 8.55 8.73 | 1.01 1.13 1.14 1.15 1.12 1.18 1.16 1.01 |
Table 7
| Numbering | W1/W2 | Evaporimeter freezing capacity ratio with the plain tube contrast | |
| Comparative example EXAMPLE Example embodiment comparative example | 21 19 2 18 20 | 0.4 0.6 1.5 2.4 2.7 | 1 1.1 1.13 1.12 1 |
Table 8
| Numbering | L2/W1 | Evaporimeter freezing capacity ratio with the plain tube contrast | |
| EXAMPLE Example embodiment comparative example | 23 2 22 24 | 0 0.6 1.1 1.3 | 1.18 1.19 1.14 1.01 |
As table 4 to table 8 and Fig. 7 to shown in Figure 11, the evaporimeter freezing capacity in an embodiment all 〉=1.1, in comparative example then less than 1.01.
As the above, according to the present invention,, and be thin layer and be distributed in tube-surface because a large amount of absorption liquids is trapped in pipe in appearance, the absorption of absorption liquid increases, and absorbent properties obtain to strengthen.
The Japan of on January 27th, 1997 application speciallys permit out hope No.9-12937, and the Japan of application on December 10th, 1997 speciallys permit out hope No.9-340372, comprises explanation, book, the full content of accompanying drawing and digest, through with reference to and be incorporated among the present invention.
Claims (3)
1, a kind of absorber heat-transfer pipe, it is characterized in that, at external diameter is the metal tube outer surface of D, on the outer circular edge periphery of the circle of pipe section when cutting perpendicular to the metal tube axial direction, the trough valley area of one group of N number (N is a natural number) is set, the length L 1 of this trough valley area on the axial direction of pipe is: 70mm≤L1≤130mm, its depth H is: 0.23mm≤H＜0.5mm, thereby the paddy that is provided with apart from P (=π D/N) in 6.2 to 8.7mm scopes; Described trough valley area group is many group combinations on the axial direction of pipe; And described be to be arranged to make the both ends insertion interlaced with each other of each trough valley area along the adjacent trough valley area group of tube axial direction.
2, by the described absorber heat-transfer pipe of claim 1, it is characterized in that, W1 is the described trough valley area that forms at the metal tube outer surface along perpendicular to the width of tubular axis on direction, W2 is on the outer circular edge periphery of pipe section circle when the axial direction perpendicular to pipe cuts, groove peak district between the formed trough valley area, perpendicular to the width of tubular axis on direction, and be satisfied with the condition of 0.5≤W1/W2≤2.5.
3, by claim 1 or 2 described absorber heat-transfer pipes, it is characterized in that, be L2 along each trough valley area insertion length interlaced with each other in the adjacent trough valley area group of tube axial direction, and be satisfied with 0≤L2/W1≤1.2.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP912937 | 1997-01-27 | ||
| JP1293797 | 1997-01-27 | ||
| JP9-12937 | 1997-01-27 | ||
| JP9340372 | 1997-12-10 | ||
| JP9-340372 | 1997-12-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1189604A CN1189604A (en) | 1998-08-05 |
| CN1091244C true CN1091244C (en) | 2002-09-18 |
Family
ID=11819207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98100084A Expired - Lifetime CN1091244C (en) | 1997-01-27 | 1998-01-26 | Heat transfer tube for absorber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1091244C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109827456B (en) * | 2019-02-14 | 2020-12-22 | 合肥美的电冰箱有限公司 | Evaporating pipe, evaporator and refrigerator |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4245697A (en) * | 1976-05-24 | 1981-01-20 | Akira Togashi | Tubular body |
| US5590711A (en) * | 1993-12-14 | 1997-01-07 | Kabushiki Kaisha Kobe Seiko Sho | Heat transfer tube for absorber |
-
1998
- 1998-01-26 CN CN98100084A patent/CN1091244C/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4245697A (en) * | 1976-05-24 | 1981-01-20 | Akira Togashi | Tubular body |
| US5590711A (en) * | 1993-12-14 | 1997-01-07 | Kabushiki Kaisha Kobe Seiko Sho | Heat transfer tube for absorber |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1189604A (en) | 1998-08-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100347852C (en) | Heat tube device and heat-tube heat exchanger | |
| CN1749684A (en) | Fin structure, heat-transfer tube having the fin structure housed therein, and heat exchanger having the heat-transfer tube assembled therein | |
| CN1158499C (en) | Plate type heat exchanger | |
| CN1061436C (en) | Heat exchanger coil assembly field of the invention | |
| CN1155793C (en) | Boiling heat transfer tube | |
| RU2494330C2 (en) | Heat exchanger containing tubes with shaped ribs | |
| CN1287117C (en) | Heat exchanger | |
| CN1131397C (en) | Absorption chiller and heat exchanger tube used same | |
| CN1125000A (en) | Grooved tubes for heat exchangers used in air conditioning and cooling apparatuses, and corresponding exchangers | |
| CN1809722A (en) | Plate fin tube-type heat exchanger | |
| US7299863B2 (en) | Louver fin type heat exchanger having improved heat exchange efficiency by controlling water blockage | |
| CN1125309C (en) | Finned heat exchanger | |
| CN1128331C (en) | Heat exchanging tube for absorber and method of manufacturing same | |
| US5960870A (en) | Heat transfer tube for absorber | |
| CN1723379A (en) | Method for producing cross-fin tube for heat exchanger, and cross fin-type heat exchanger | |
| CN1833142A (en) | Finned heat exchanger and method of manufacturing the same | |
| CN1748118A (en) | Finned tube for heat exchangers, heat exchanger, apparatus for fabricating heat exchanger finned tube and process for fabricating heat exchanger finned tube | |
| CN1477366A (en) | Heat exchanger | |
| CN86107263A (en) | Heat-exchange device | |
| CN1529113A (en) | Shell-and-tube heat exchanger | |
| CN1091244C (en) | Heat transfer tube for absorber | |
| CN1239217A (en) | Heat exchange tube with additional structure for adding heat transfer area | |
| CN1164634A (en) | Absorption refrigerator | |
| CN111862792B (en) | Display module and display device | |
| CN1445503A (en) | Finned tube type heat exchanger |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20020918 |