CN203928844U - A kind of heat-exchanger fin and heat exchanger of water heater - Google Patents

A kind of heat-exchanger fin and heat exchanger of water heater Download PDF

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Publication number
CN203928844U
CN203928844U CN201420385636.8U CN201420385636U CN203928844U CN 203928844 U CN203928844 U CN 203928844U CN 201420385636 U CN201420385636 U CN 201420385636U CN 203928844 U CN203928844 U CN 203928844U
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Prior art keywords
heat
exchanger
fin
exchanger fin
heat exchanger
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CN201420385636.8U
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Chinese (zh)
Inventor
陶放
邱斌
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Chengdu Chiffo Electronics Co Ltd
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Chengdu Chiffo Electronics Co Ltd
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Abstract

The utility model relates to gas heater technical field, a kind of heat-exchanger fin being specifically related to and the heat exchanger of water heater that adopts this fin, described heat-exchanger fin is provided with 8 pores, and described 8 pores from bottom to top adopt 3-3-2 mode on described heat-exchanger fin, to line up three rows.Adopt heat exchanger of the present utility model in working order under, high-temperature flue gas rises, and through heat exchanger copper pipe upper fin sheet, carries out a large amount of heat convections, because the copper pipe through heat exchanger fin adopts the version of 3-3-2 from bottom to top, its exchange capability of heat increases substantially.

Description

A kind of heat-exchanger fin and heat exchanger of water heater
Technical field
The utility model relates to gas heater technical field, a kind of heat-exchanger fin being specifically related to and the heat exchanger of water heater that adopts this fin.
Background technology
At present, the fin structure of high-power (being greater than 32Kw) combustion gas fast type water heater heat exchanger used is generally the arrangement mode by 3-2-3; So just easily make heat-exchanger fin middle part overheated, cause reduction of heat exchange efficiency, fin high-temperature oxydation, shortens the life-span; When little load combustion heat-exchange, due to heat exchanger, going up row is most that 3 water pipes pass fin in addition, and caloric receptivity is large, and exhaust gas temperature is reduced, and easily produces condensed water, corrodes copper pipe and the fin of heat exchanger, affects the service life of heat exchanger.
By the heat exchanger busy hour to existing 3-2-3 arrangement mode, carry out parameter testing, draw following test data and heat-exchanger surface situation:
Heat exchanger water temperature inside test point (101~110)
1, water temperature probe test data:
As shown in Figure 1, accompanying drawing 1 is heat exchanger front schematic view, wherein mark 201 is cold water inlet pipe, mark 202 is hot outlet pipe, first row 301 represents the position of first row pore, and second row 302 represents the position of second row pore, and the 3rd row 303 represents the position in the 3rd comb hole, described pore is used for inserting water pipe, and the mark 2 in accompanying drawing 5 is described pore schematic diagram.Accompanying drawing 2 and 3 is right view and the left view of accompanying drawing 1, and the mark 101-110 on accompanying drawing 2 and accompanying drawing 3 is test point one to ten, and the position of mark 101-110 is the test position of ten test points in table.Mark 401 is that heat exchanger is positive, and mark 402 is the back side.
2, surface temperature situation:
As shown in Figure 4,12 point for measuring temperature positions that the position of mark 501-512 indication is heat-exchanger surface, the temperature of these 12 points for measuring temperature is as following table:
Point for measuring temperature numbering Temperature (℃)
501 99
502 102
503 97
504 113
505 134
506 130
507 97
508 116
509 103
510 64
511 67
512 69
In addition, (be mark 504-506 around) around second row 302, find, heat exchanger just, the oxygen-free copper generation oxidation stain at the back side.
3, analyze:
1), from water temperature probe test data analysis, enclose the water temperature temperature rise from cold water inlet pipe 201 to test point 3 103 on frame and only have 1 ℃ of left and right, not high; From test point 4 104 to test point 8 108, water temperature temperature rise raises gradually; Especially test point 5 105, test point 7 107, test point 8 108; But temperature rise is inhomogeneous; From test point 9 109 to test point 10, water temperature temperature rise reduces again gradually; Especially test point 9 109;
The reason causing, by analysis:
(1), due to the high-temperature flue gas in combustion chamber (radiant energy and convection heat transfer' heat-transfer by convection) with its on the heat transfer rate low (bronze pan tube heat exchange area is less, and in-pipe flow speed is fast) of coil pipe;
(2), high-temperature flue gas continue to rise, and through heat exchanger copper pipe upper fin sheet, carries out a large amount of heat convections.Wherein exchange capability of heat shows as, and the first row of heat exchanger, second row are higher than the 3rd row.
2), from surface temperature situation, second row temperature drift (second row only have 2 copper pipes arrange); After cutting heat exchanger open, find within the scope of second row, oxygen-free copper generation oxidation stain place, fin area is larger, passes again, therefore cause this place's oxygen-free copper generation oxidation stain without copper pipe.
Utility model content
The problem existing for prior art, provides the heat exchanger of water heater that a kind of heat exchanger effectiveness is high, fin middle part temperature is not overheated and be difficult for producing the heat-exchanger fin of condensed water and adopt this fin.
The technical solution adopted in the utility model is:
A kind of heat-exchanger fin, described heat-exchanger fin is provided with 8 pores, described 8 pores from bottom to top adopt 3-3-2 mode on described heat-exchanger fin, to line up three rows, 8 pores are lined up three rows from the bottom up, first row comprises 3 pores, the 2nd row also comprises three pores, and 2 pores are drawn together in the 3rd package.Owing to adopting from bottom to top the version of 3-3-2 through the copper pipe of heat exchanger fin, its exchange capability of heat increases substantially; From surface temperature situation, under peak load state, heat-exchanger surface temperature is less than 130 ℃, and oxidation stain phenomenon does not occur oxygen-free copper copper pipe; When little load combustion heat-exchange, due to heat exchanger, going up row is most that 2 water pipes pass fin in addition, and caloric receptivity is little, makes exhaust gas temperature unlikely too low, is difficult for producing condensed water, has extended the service life of heat exchanger.
As preferred embodiment of the present utility model, the place that described pore is not established on described heat-exchanger fin surface, is made with and turns over bag or hole flanging.Turn over the effect of bag or hole flanging: high-temperature flue gas is formed to flow-disturbing, improve heat exchanger effectiveness.
As preferred embodiment of the present utility model, described heat-exchanger fin adopts corrosion-resistant, resistant to elevated temperatures sheet metal to make.
As preferred embodiment of the present utility model, described heat-exchanger fin adopts oxygen-free copper or stainless steel material to make.
A heat exchanger of water heater, is characterized in that, adopts the heat-exchanger fin described in above-mentioned any one.
As preferred embodiment of the present utility model, also comprise the 8 piece water pipes corresponding with described 8 pores, described water pipe is provided with 70 to 90 described heat-exchanger fins.Not only water pipe two ends are provided with fin, are all provided with fin on whole water pipe.
As preferred embodiment of the present utility model, described water pipe links together by melting welding welding procedure and described heat-exchanger fin.
As preferred embodiment of the present utility model, in described water pipe, be provided with helical form insert.Helical form insert effect: destroy current boundary layer, form mixed flow, increase heat exchanger effectiveness.
As preferred embodiment of the present utility model, described water pipe is circular copper pipe.The i.e. water pipe herein of other local described copper pipes or bronze pan tube herein.
In sum, owing to having adopted technique scheme, the beneficial effects of the utility model are:
1, adopt heat exchanger of the present utility model in working order under, high-temperature flue gas rises, through heat exchanger copper pipe upper fin sheet, carry out a large amount of heat convections, owing to adopting from bottom to top the version of 3-3-2 through the copper pipe of heat exchanger fin, its exchange capability of heat increases substantially.
2, from surface temperature situation, under peak load state, heat-exchanger surface temperature is less than 130 ℃, and oxygen-free copper oxidation stain phenomenon can not occur.
3, when little load combustion heat-exchange, due to heat exchanger, going up row is most that 2 water pipes pass fin, and caloric receptivity is little, makes exhaust gas temperature unlikely too low, is difficult for producing condensed water, has extended the service life of heat exchanger.
4, in flue gas, there is a large amount of moisture content to exist with steam form; When adopting 3-2-3 arrangement mode, in its smoke exhaust pipe, flue-gas temperature only has 70~80 ℃ of left and right, easily produces condensed water, and condensate return has corrosion to heat exchanger and burner to burner hearth, affects service life and safe combustion.And while adopting 3-3-2 arrangement mode, in its smoke exhaust pipe, flue-gas temperature is greater than 110 ℃, is difficult for producing condensed water.
Accompanying drawing explanation
Fig. 1 is heat exchanger front schematic view
Fig. 2 is the right view of Fig. 1
Fig. 3 is the left view of Fig. 1
Fig. 4 is 3-2-3 arrangement mode point for measuring temperature schematic diagram
Fig. 5 is the structural representation of the utility model fin
Fig. 6 is the side view of Fig. 4
Fig. 7 is A place enlarged drawing in Fig. 6
Fig. 8 is the structural representation that water pipe and fin are installed together
Fig. 9 is 3-3-2 arrangement mode point for measuring temperature schematic diagram
Mark in figure: 1-heat-exchanger fin, 2-pore, 3-turns over bag, 4-water pipe, 5-helical form insert, 6-high-temperature flue gas, 7-current, 101-test point one, 102-test point two, 103-test point three, 104-test point four, 105-test point five, 106-test point six, 107-test point seven, 108-test point eight, 109-test point nine, 110-test point ten, the cold water inlet pipe of 201-, the hot outlet pipe of 202-, 301-first row, 302-second row, 303-the 3rd row, 401-is positive, the 402-back side, 501-point for measuring temperature one, 502-point for measuring temperature two, 503-point for measuring temperature three, 504-point for measuring temperature four, 505-point for measuring temperature five, 506-point for measuring temperature six, 507-point for measuring temperature seven, 508-point for measuring temperature eight, 509-point for measuring temperature nine, 510-point for measuring temperature ten, 511-point for measuring temperature 11, 512-point for measuring temperature 12, 601-the utility model arrangement mode point for measuring temperature one, 602-the utility model arrangement mode point for measuring temperature two, 603-the utility model arrangement mode point for measuring temperature three, 604-the utility model arrangement mode point for measuring temperature four, 605-the utility model arrangement mode point for measuring temperature five, 606-the utility model arrangement mode point for measuring temperature six, 607-the utility model arrangement mode point for measuring temperature seven, 608-the utility model arrangement mode point for measuring temperature eight, 609-the utility model arrangement mode point for measuring temperature nine, 610-the utility model arrangement mode point for measuring temperature ten, 611-the utility model arrangement mode point for measuring temperature 11, 612-the utility model arrangement mode point for measuring temperature 12, 613-the utility model arrangement mode point for measuring temperature 13, 614-the utility model arrangement mode point for measuring temperature 14, 615-the utility model arrangement mode point for measuring temperature 15.
The specific embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is described further.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Embodiment 1
Heat-exchanger fin as shown in Figure 1, heat-exchanger fin 1 is provided with 8 pores 2, described 8 pores 2 from bottom to top adopt 3-3-2 mode to line up three rows on described heat-exchanger fin 1,8 pores are lined up three rows from the bottom up, first row comprises 3 pores, the 2nd row also comprises three pores, and 2 pores are drawn together in the 3rd package.Owing to adopting from bottom to top the version of 3-3-2 through the copper pipe (being water pipe) of heat exchanger fin (being fin), its exchange capability of heat increases substantially; From surface temperature situation, under peak load state, heat-exchanger surface temperature is less than 130 ℃, and oxidation stain phenomenon does not occur oxygen-free copper copper pipe; When little load combustion heat-exchange, due to heat exchanger, going up row is most that 2 water pipes pass fin in addition, and caloric receptivity is little, makes exhaust gas temperature unlikely too low, is difficult for producing condensed water, has extended the service life of heat exchanger.
Shown in Fig. 2 and Fig. 3, the place that described pore 2 is not established on described heat-exchanger fin 1 surface, is made with and turns over bag 3, also can make hole flanging.Turn over the effect of bag or hole flanging: high-temperature flue gas is formed to flow-disturbing, improve heat exchanger effectiveness.Described heat-exchanger fin adopts corrosion-resistant, resistant to elevated temperatures sheet metal to make, and adopts oxygen-free copper or stainless steel material to make in the present embodiment.
Heat exchanger of water heater as shown in Figure 4, adopts above-mentioned heat-exchanger fin; Also comprise the 8 piece water pipes 4 corresponding with described 8 pores 2, described water pipe is provided with 70 to 90 described heat-exchanger fins 1.Not only water pipe 4 two ends are provided with fin 1, on whole water pipe 4, are all provided with fin 1, and Fig. 4 is cutaway view, has only analysed and observe two ends, in fact whole water pipe 4, are all provided with fin 1.Described water pipe 4 links together by melting welding welding procedure and described heat-exchanger fin 1.In described water pipe 4, be provided with helical form insert 5.Helical form insert effect: destroy current boundary layer, form mixed flow, increase heat exchanger effectiveness.In the present embodiment, described water pipe 4 is circular copper pipe.
The heat exchanger busy hour parameter testing of 3-3-2 arrangement mode after improving:
1, surface temperature situation:
As accompanying drawing 9, the position of mark 601-612 is 15 point for measuring temperature positions of the heat-exchanger surface of the utility model 3-3-2 arrangement mode, and the temperature test result of these 15 points for measuring temperature is as following table:
Point for measuring temperature numbering Temperature (℃)
601 88
602 85
603 76
604 85
605 85
606 88
607 120
608 100
609 103
610 63
611 72
612 65
613 60
614 72
615 62
2, water temperature probe test data:
In upper table, in the position of test point 1-10 and accompanying drawing 2 and accompanying drawing 3, mark 101-110 is just the same, and corresponding one by one, so in accompanying drawing, there is no to draw separately the test point schematic diagram of the heat exchanger of 3-3-2 arrangement mode.
3, analyze:
The first, by improving after exchange fin structure form:
(1), water inlet is between test point 1: due to the high-temperature flue gas in combustion chamber (radiant energy and convection heat transfer' heat-transfer by convection) with its on the heat transfer rate low (bronze pan tube heat exchange area is less, and in-pipe flow speed is fast) of coil pipe, temperature rise is lower.
(2), high-temperature flue gas continue to rise, and through heat exchanger copper pipe upper fin sheet, carries out a large amount of heat convections.Owing to adopting from bottom to top the version of 3-3-2 through the copper pipe of heat exchanger fin, its exchange capability of heat increases substantially; Higher and even from test point 2 to 6 temperature rises.
2, from surface temperature situation, under peak load state, heat-exchanger surface temperature is less than 130 ℃, and oxygen-free copper is without oxidation stain phenomenon occurs;
Find out thus, this kind of heat exchanger compared with the homotype heat exchanger of existing structure, and exchange capability of heat is greatly improved.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.

Claims (9)

1. a heat-exchanger fin, is characterized in that, described heat-exchanger fin is provided with 8 pores, and described 8 pores from bottom to top adopt 3-3-2 mode on described heat-exchanger fin, to line up three rows.
2. heat-exchanger fin according to claim 1, is characterized in that, the place that described pore is not established on described heat-exchanger fin surface is made with and turns over bag or hole flanging.
3. heat-exchanger fin according to claim 1 and 2, is characterized in that, described heat-exchanger fin adopts corrosion-resistant, resistant to elevated temperatures sheet metal to make.
4. heat-exchanger fin according to claim 3, is characterized in that, described heat-exchanger fin adopts oxygen-free copper or stainless steel material to make.
5. a heat exchanger of water heater, is characterized in that, adopts the heat-exchanger fin described in above-mentioned any one.
6. heat exchanger of water heater according to claim 5, is characterized in that, also comprises the 8 piece water pipes corresponding with described 8 pores, and described water pipe is provided with 70 to 90 described heat-exchanger fins.
7. heat exchanger of water heater according to claim 6, is characterized in that, described water pipe links together by melting welding welding procedure and described heat-exchanger fin.
8. according to the heat exchanger of water heater described in claim 5,6 or 7, it is characterized in that, in described water pipe, be provided with helical form insert.
9. heat exchanger of water heater according to claim 8, is characterized in that, described water pipe is circular copper pipe.
CN201420385636.8U 2014-07-11 2014-07-11 A kind of heat-exchanger fin and heat exchanger of water heater Active CN203928844U (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104075607A (en) * 2014-07-11 2014-10-01 成都前锋电子有限责任公司 Fin of heat exchanger and water heater heat exchanger

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104075607A (en) * 2014-07-11 2014-10-01 成都前锋电子有限责任公司 Fin of heat exchanger and water heater heat exchanger

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