CN102901226B - A kind of heat exchanger of gas heater - Google Patents
A kind of heat exchanger of gas heater Download PDFInfo
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- CN102901226B CN102901226B CN201210339186.4A CN201210339186A CN102901226B CN 102901226 B CN102901226 B CN 102901226B CN 201210339186 A CN201210339186 A CN 201210339186A CN 102901226 B CN102901226 B CN 102901226B
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- water pipe
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- convection water
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Abstract
The present invention relates to fluid heater field, particularly relate to a kind of heat exchanger of gas heater, comprise: shell (1), be arranged on the heat collecting sheet (2) of cover top portion, heat convection water pipe (3), and be coiled in the radiation heat transfer water pipe (4) of shell surrounding; It is characterized in that, described heat convection water pipe (3) is single row type setting, and the diameter of this heat convection water pipe (3) is between 9mm-13mm.The present invention one anti-convention heat exchanger designs thinking, be single setting by the double of heat convection water pipe and even many rows Structure Transformation, and by suitably reducing heat convection water pipe caliber, increase heat collecting sheet, its beneficial effect is: make the exchange capability of heat of heat exchanger improve about 25%, and then for obtaining identical heat exchange amount, the convection current effective heat exchange area of single row of tubes can reduce 25%, saving copper material use quantity, reduces manufacturing cost.
Description
Technical field
The present invention relates to fluid heater field, particularly relate to a kind of heat exchanger of gas heater.
Background technology
The operation principle of gas heater is: produce hot-air by burner combustion, then is transferred to from air in water by heat energy by heat exchanger, finally produces hot water.Therefore, the heat exchanger effectiveness of gas heater is one of its important technical indicator.
For improving the heat exchanger effectiveness of gas heater, existing the most frequently used technological means is exactly just arrange heat absorbing sheet and water pipe on the burner; Especially, for preventing heat to run off between heat absorbing sheet and water pipe, water pipe is often set at least two-layer by the manufacturers of gas heater, and arranges turbulent sheet between the layers, reduces the loss speed of hot gas further.The Chinese patent being CN101949661A as one section of publication number discloses a kind of heat exchanger for gas water heater, comprise heat exchanger housing, heat absorbing sheet 01 and heat exchanging water pipe 02, described heat absorbing sheet 01 offers at least two drain tube holes going to upper and lower distribution, described heat absorbing sheet 01 is also provided with some turbulent protuberances 03, described turbulent protuberance 03 is positioned at above heat absorbing sheet 01 time drain tube holes, as shown in Figure 1.A kind of heat exchanger for gas water heater that this patent provides, though the heat exchange efficiency of heat exchanger can be improved by setting up turbulent portion, but still there is several drawbacks: 1) water pipe carries out arranging design more, caliber is relatively large, general at more than 15mm, for this reason, the copper material consumption that valency is high is large, cost is high, hinders it and applies; 2) water pipe many rows design inevitably causes the different water pipes on different row to there is temperature contrast, and heat exchange is uneven, constrains the raising of exchange capability of heat.As shown in Figure 2, the exchange capability of heat simulation drawing on a kind of various heat exchange water pipe is which provided.
Be heated for different water pipe the problem of uneven restriction exchange capability of heat, in industry, also someone proposes to arrange exhaust gases passes on heat absorbing sheet, strengthens flue gas velocity of liquid assets, shortens the temperature difference of heat absorbing sheet upper and lower side.Comprise as one section of document number Chinese patent that is CN201126330Y discloses a kind of heat absorption tablet for heat exchanger: heat absorbing sheet 01, be arranged at least two drain tube holes 04 heat absorbing sheet 01 going to upper and lower distribution, it is characterized in that, described heat absorbing sheet 01 offers tubulose projecting apertures 05, and the inside up/down perforation of described tubulose projecting apertures 05 forms exhaust gases passes.Though this patent can alleviate the problem of inequality of absorbing heat by arranging exhaust gases passes on heat absorbing sheet, it is still and designs based on many drainpipes, also there is copper material consumption many, the problem that cost is high; Meanwhile, heat absorbing sheet is offered the production process that exhaust gases passes adds heat exchanger undoubtedly, structure relative complex.
In view of this, be very necessary to develop a kind of structure simple, heat absorption evenly, the heat exchanger of what heat exchange efficiency was high be applicable to gas heater.
Summary of the invention
For the defect that prior art exists, the object of the invention is to, while simplifying existing heat converter structure, improve the heat exchange efficiency of heat exchanger.
For reaching above object, the present invention adopts following technical scheme.
A heat exchanger for gas heater, comprising: shell (1), is arranged on the heat collecting sheet (2) of cover top portion, heat convection water pipe (3), and is coiled in the radiation heat transfer water pipe (4) of shell surrounding; It is characterized in that, described heat convection water pipe (3) is that the single row type being on average arranged in cover top portion is arranged, and the material of this heat convection water pipe (3) is oxygen-free copper, and its diameter is between 9mm-13mm; The height of described heat collecting sheet is between 15mm-30mm, and the spacing between described heat collecting sheet is 1.5mm-2.0mm; The quantity of described heat convection water pipe (3) is four or five.
As with improvement, the caliber of described radiation heat transfer water pipe is between 9mm-13mm.The setting of this caliber scope, is improving the coefficient of heat transfer between water pipe and current simultaneously; Complete machine discharge can not be caused less than normal, and water cut-off temperature-rising and water temperature overshoot are risen; Effectively avoid dry combustion method, good by water comfortableness.Compared with traditional heat exchanger, heat collecting sheet height and density increase all a little, ensure the heat exchange efficiency of heat exchanger.
As with improvement, in described heat convection water pipe (3) and/or radiation heat transfer water pipe (4), be provided with water turbulence sheet.
Further with improvement, the shape of described turbulent sheet is twisted shape, improves turbulent effect.
As with improvement, the radiation heat transfer water pipe (4) be coiled on shell 1 surrounding sidewall is integrally extended at the two ends of described heat convection water pipe (3), and described heat convection water pipe (3) is identical with the caliber of described radiation heat transfer water pipe (4).
With improvement, the aperture of described heat convection water pipe (3) is less than the aperture of described radiation heat transfer water pipe (4) to another kind.To accelerate the flowing velocity of current in heat convection water pipe (3), the heat exchange efficiency of further heat exchanger.
The present invention one anti-convention heat exchanger designs thinking, be single setting by the double of heat convection water pipe and even many rows Structure Transformation, and by suitably reducing heat convection water pipe caliber, increase heat collecting sheet, its beneficial effect is: effectively reduce flue gas boundary layer thickness, makes the exchange capability of heat of heat exchanger improve about 25%, and then for obtaining identical heat exchange amount, the convection current effective heat exchange area of single row of tubes can reduce 25%, saving copper material use quantity, reduces manufacturing cost.
Accompanying drawing explanation
Figure 1 shows that existing heat converter structure schematic diagram;
Figure 2 shows that existing heat exchanger water pipe heat absorption capacity simulation drawing;
Figure 3 shows that existing heat exchanger heat absorbing sheet structural representation;
Figure 4 shows that heat exchanger front view provided by the invention;
Figure 5 shows that heat exchanger partial sectional view provided by the invention;
Figure 6 shows that heat exchanger rearview provided by the invention;
Figure 7 shows that heat exchanger water pipe heat absorption capacity simulation drawing provided by the invention.
Description of reference numerals:
01, heat absorbing sheet 02, heat exchanging water pipe 03, turbulent protuberance 04, water pipe hole 05, tubulose projecting apertures
1, shell 2, heat collecting sheet 3, heat convection water pipe 4, radiation heat transfer water pipe.
Detailed description of the invention
For setting forth essence of the present invention further, by reference to the accompanying drawings the specific embodiment of the present invention is described as follows.
As Figure 4-Figure 6, a kind of heat exchanger of gas heater, comprising: shell 1, is arranged on the heat collecting sheet 2 at shell 1 top, heat convection water pipe 3, and is coiled in the radiation heat transfer water pipe 4 of shell 1 surrounding; It is characterized in that, described heat convection water pipe 3 is single row type setting, and the diameter of this heat convection water pipe 3 is between 9mm-13mm.
Wherein, described shell 1 is preferably the straight-tube shape that cross section is rectangle; The top of this shell 1 is fixed with heat collecting sheet 2, the burner of the bottom of shell 2; Preferably, the quantity of described heat collecting sheet 2 is 90, and the spacing between each heat collecting sheet is 1.5mm-2.0mm.In other embodiments, the cross section of described shell is circular or triangle, is not limited to the present embodiment.
As shown in Figure 5, the quantity of described heat convection water pipe 3 is preferably 4, and the diameter of every root heat convection water pipe 3 is at 11mm, and it is parallel interts on heat collecting sheet 2, makes the spacing between every root heat convection water pipe 3 equal.The radiation heat transfer water pipe 4 be coiled on shell 1 surrounding sidewall is integrally extended at the two ends of described heat convection water pipe 3.Preferably, described heat collecting sheet 2 is also provided with hot gas turbulent flow passageway.Further, for improving the heat exchange efficiency of heat exchanger, the aperture of described heat convection water pipe 3 is less than the aperture of described radiation heat transfer water pipe.To accelerate the flowing velocity of current in heat convection water pipe 3.In other embodiments, the quantity of described heat convection water pipe is 5, is connected between heat convection water pipe and radiation heat transfer water pipe by connector, and this heat convection water pipe is identical with the pipe diameter size of radiation heat transfer water pipe, is not limited to the present embodiment.
The heat exchanger of a kind of gas heater that the present embodiment provides, owing to being arranged to single row configuration by arranging heat convection water pipe, about making flue gas boundary layer reduce to original half, improves the coefficient of heat transfer between flue gas and heat convection water pipe more; Meanwhile, by changing the aperture of heat convection water pipe into 11mm, improving the coefficient of heat transfer between water pipe and current simultaneously, complete machine discharge can not be caused less than normal; Water cut-off temperature-rising and water temperature overshoot are risen, and affect comfortableness and the problem occurring shutdown dry combustion method.
By theory calculate, the heat exchanger that the present embodiment provides is compared with traditional heat exchanger, and average heat transfer coefficient improves more than 17%; Get the thinning rear temperature difference rising 50K in flue gas boundary layer, its exchange capability of heat of preresearch estimates
promote more than 26%.According to heat exchange formula:
for obtaining identical heat exchange amount, the convection current effective heat exchange area F of single row of tubes can reduce 26%, thus can alleviate the weight of water tank.For further illustrating the beneficial effect that the present embodiment brings, we carry out exchange capability of heat simulation to the heat exchanger after improvement, as shown in Figure 7.From this figure, we can see, when total heat absorption capacity is certain, the exchange capability of heat of radiation heat transfer water pipe has brought up to 14%, and the maximum disparity between heat convection water pipe reduces to 5%, and heat exchange is even, and endothermic effect is good.
Above detailed description of the invention has been described in detail essence of the present invention, but can not limit protection scope of the present invention with this.Apparently, under the enlightenment of essence of the present invention, the art those of ordinary skill also can carry out many improvement and modification, it should be noted that these improve and modify and all drops within claims.
Claims (4)
1. a heat exchanger for gas heater, comprising: shell (1), is arranged on the heat collecting sheet (2) of cover top portion, heat convection water pipe (3), and is coiled in the radiation heat transfer water pipe (4) of shell surrounding; It is characterized in that, described heat convection water pipe (3) is that the single row type being on average arranged in cover top portion is arranged, and the material of this heat convection water pipe (3) is oxygen-free copper, and its diameter is between 9mm-13mm; The height of described heat collecting sheet is between 15mm-30mm, and the spacing between described heat collecting sheet is 1.5mm-2.0mm; The quantity of described heat convection water pipe (3) is four or five; The aperture of described heat convection water pipe is less than the aperture of described radiation heat transfer water pipe.
2. the heat exchanger of gas heater according to claim 1, is characterized in that, the caliber of described radiation heat transfer water pipe (4) is between 9mm-13mm.
3. the heat exchanger of gas heater according to claim 1, is characterized in that, is provided with water turbulence sheet in described heat convection water pipe (3) and/or radiation heat transfer water pipe (4); The shape of described turbulent sheet is twisted shape.
4. the heat exchanger of gas heater according to claim 1, is characterized in that, the radiation heat transfer water pipe (4) be coiled on shell (1) surrounding sidewall is integrally extended at the two ends of described heat convection water pipe (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210339186.4A CN102901226B (en) | 2012-09-14 | 2012-09-14 | A kind of heat exchanger of gas heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210339186.4A CN102901226B (en) | 2012-09-14 | 2012-09-14 | A kind of heat exchanger of gas heater |
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| Publication Number | Publication Date |
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| CN102901226A CN102901226A (en) | 2013-01-30 |
| CN102901226B true CN102901226B (en) | 2015-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210339186.4A Active CN102901226B (en) | 2012-09-14 | 2012-09-14 | A kind of heat exchanger of gas heater |
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| Country | Link |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104110860B (en) * | 2013-08-21 | 2017-07-25 | 芜湖美的厨卫电器制造有限公司 | Gas and hot water device assembly and heat exchanger |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1026454A2 (en) * | 1999-02-04 | 2000-08-09 | Rinnai Kabushiki Kaisha | Heat exchanger apparatus |
| CN1553115A (en) * | 2003-05-27 | 2004-12-08 | 株式会社庆东Boiler | Combustion chamber of gas boiler |
| CN201126330Y (en) * | 2007-10-30 | 2008-10-01 | 上海林内有限公司 | Heat absorption tablet for heat exchanger |
| CN101666584A (en) * | 2009-09-15 | 2010-03-10 | 广东万家乐燃气具有限公司 | Finned pipe exchanger with copper-aluminum composite pipe for gas instantaneous water heater |
| CN101949661A (en) * | 2010-09-21 | 2011-01-19 | 樱花卫厨（中国）股份有限公司 | Heat exchanger for fuel water heater |
-
2012
- 2012-09-14 CN CN201210339186.4A patent/CN102901226B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1026454A2 (en) * | 1999-02-04 | 2000-08-09 | Rinnai Kabushiki Kaisha | Heat exchanger apparatus |
| CN1553115A (en) * | 2003-05-27 | 2004-12-08 | 株式会社庆东Boiler | Combustion chamber of gas boiler |
| CN201126330Y (en) * | 2007-10-30 | 2008-10-01 | 上海林内有限公司 | Heat absorption tablet for heat exchanger |
| CN101666584A (en) * | 2009-09-15 | 2010-03-10 | 广东万家乐燃气具有限公司 | Finned pipe exchanger with copper-aluminum composite pipe for gas instantaneous water heater |
| CN101949661A (en) * | 2010-09-21 | 2011-01-19 | 樱花卫厨（中国）股份有限公司 | Heat exchanger for fuel water heater |
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| CN102901226A (en) | 2013-01-30 |
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