CN102901226A - Heat exchanger of gas water heater - Google Patents
Heat exchanger of gas water heater Download PDFInfo
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- CN102901226A CN102901226A CN2012103391864A CN201210339186A CN102901226A CN 102901226 A CN102901226 A CN 102901226A CN 2012103391864 A CN2012103391864 A CN 2012103391864A CN 201210339186 A CN201210339186 A CN 201210339186A CN 102901226 A CN102901226 A CN 102901226A
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Abstract
The invention relates to the field of a fluid heater and particularly relates to a heat exchanger of a gas water heater. The heat exchanger comprises a shell (1), a heat collecting sheet (2) arranged at the top of the shell, a convection heat exchanging water pipe (3) and a heat radiation heat exchanging pipe (4) coiled on the periphery of the shell. The heat exchanger is characterized in that the convection heat exchanging water pipe (3) is arranged in a single row manner; and the diameter of the convection heat exchanging water pipe (3) is 9-13 mm. The heat exchanger does not adopt a regular heat exchanger design concept and changes a double-row even a multi-row structure of the convection heat exchanging water pipe into single-row arrangement; the pipe diameter of the convection heat exchanging water pipe is suitably shortened and the heat collecting sheet is additionally arranged, so that the heat exchanger has the beneficial effects that the heat-exchanging capability of the heat exchanger is improved by about 25% and the same heat-exchanging mount further obtained; and the convection effective heat-exchanging area of a single-row pipe can be reduced by 25%, the use amount of copper materials is saved and the manufacturing cost is reduced.
Description
Technical field
The present invention relates to the fluid heater field, relate in particular to a kind of heat exchanger of gas heater.
Background technology
The operation principle of gas heater is: produce hot-air by burner combustion, by heat exchanger heat energy is transferred to from air in the water, produce at last 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 arranges heat absorbing sheet and water pipe exactly above burner; Especially, run off between heat absorbing sheet and water pipe for preventing heat, the manufacturers of gas heater often water pipe are set to two-layerly at least, and turbulent sheet are set between the layers, further reduce the loss speed of hot gas.The Chinese patent that is CN101949661A such as one piece 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, offer at least two draining pores that go to upper and lower distribution on the described heat absorbing sheet 01, also be provided with some turbulent protuberances 03 on the described heat absorbing sheet 01, described turbulent protuberance 03 be positioned at 01 time draining pore of heat absorbing sheet above, as shown in Figure 1.A kind of heat exchanger for gas water heater that this patent provides, though can improve the heat exchange efficiency of heat exchanger by setting up turbulent section, but still have several drawbacks: 1) water pipe carries out many row's designs, caliber is relatively large, generally more than 15mm, for this reason, the copper material amount of expending that valency is high is large, cost is high, has hindered it and has applied; 2) water pipe is arranged design more and is caused inevitably the different water pipes on the different rows to have temperature contrast, and heat exchange is inhomogeneous, has restricted the raising of exchange capability of heat.As shown in Figure 2, it provides the exchange capability of heat simulation drawing on a kind of various heat exchange water pipe.
For the be heated problem of uneven restriction exchange capability of heat of different water pipes, also someone proposes at heat absorbing sheet exhaust gases passes to be set in the industry, strengthens the flue gas velocity of liquid assets, shortens the temperature difference of heat absorbing sheet upper and lower side.Disclosing a kind of heat absorption tablet for heat exchanger such as one piece of document number Chinese patent that is CN201126330Y comprises: heat absorbing sheet 01, be arranged at least two draining pores 04 that go to upper and lower distribution on the heat absorbing sheet 01, it is characterized in that, offer the protruding hole 05 of tubulose on the described heat absorbing sheet 01, the inside up/down perforation in the protruding hole 05 of described tubulose forms exhaust gases passes.Though this patent can be alleviated the uneven problem of heat absorption by exhaust gases passes is set at heat absorbing sheet, it still is based on many drainpipe designs, also exists the copper material consumption many, the problem that cost is high; Simultaneously, offer the production process that exhaust gases passes has increased heat exchanger undoubtedly at heat absorbing sheet, the structure relative complex.
In view of this, very be necessary to develop a kind of simple in structure, heat absorption evenly, the heat exchanger that is applicable to gas heater that heat exchange efficiency is high.
Summary of the invention
Defective for prior art exists the object of the invention is to, and improves the heat exchange efficiency of heat exchanger when simplifying existing heat converter structure.
For reaching above purpose, the present invention adopts following technical scheme.
A kind of heat exchanger of gas heater comprises: shell (1) is arranged on heat collecting sheet (2), the heat convection water pipe (3) of cover top portion, and is coiled in the radiation heat transfer water pipe (4) around the shell; It is characterized in that, described heat convection water pipe (3) is the single row type setting, and the diameter of this heat convection water pipe (3) is between 9mm-13mm.
As with improvement, the quantity of described heat convection water pipe (3) is four or five, on average is arranged in cover top portion.
As with improvement, the caliber of described radiation heat transfer water pipe is between 9mm-13mm.The setting of this caliber scope is in the coefficient of heat transfer while of improving between water pipe and current; Can not cause complete machine discharge less than normal, water cut-off temperature-rising and water temperature overshoot are risen; Effectively avoid dry combustion method, the water comfortableness is good.
As with improvement, the height of described heat collecting sheet is between the 15mm-30mm; Spacing between described heat collecting sheet is 1.5mm-2.0mm.Compare with traditional heat exchanger, heat collecting sheet height and density all increase a little, guarantee the heat exchange efficiency of heat exchanger.
As with improvement, be provided with the water turbulence sheet in described heat convection water pipe (3) and/or the radiation heat transfer water pipe (4).
Further with improvement, described turbulent sheet be shaped as twisted shape, improve turbulent effect.
As with improvement, described heat convection water pipe (3) the two ends one extend and be coiled in the radiation heat transfer water pipe (4) on the sidewall around the shell 1, described heat convection water pipe (3) is identical with the caliber of described radiation heat transfer water pipe (4).
Another kind 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 accelerate the flowing velocity of current in heat convection water pipe (3), the heat exchange efficiency of further heat exchanger.
The present invention's one anti-convention heat exchanger designs thinking, with the double of heat convection water pipe and even to arrange Structure Transformation be single setting more, and by suitably dwindling heat convection water pipe caliber, increase heat collecting sheet, its beneficial effect is: effectively dwindle the flue gas boundary layer thickness, so that the exchange capability of heat of heat exchanger improves 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%, and the saving copper material use quantity reduces manufacturing cost.
Description of drawings
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 figure 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, the protruding hole of tubulose
1, shell 2, heat collecting sheet 3, heat convection water pipe 4, radiation heat transfer water pipe.
The specific embodiment
For further setting forth essence of the present invention, by reference to the accompanying drawings the specific embodiment of the present invention is described as follows.
Such as Fig. 4-shown in Figure 6, a kind of heat exchanger of gas heater comprises: shell 1 is arranged on heat collecting sheet 2, the heat convection water pipe 3 at shell 1 top, and is coiled in the radiation heat transfer water pipe 4 around the shell 1; It is characterized in that, described heat convection water pipe 3 is the 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 the 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 circle 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 heat convection water pipe 3 its parallel interting on heat collecting sheet 2, equates the spacing of 3 in every heat convection water pipe at 11mm.The two ends one of described heat convection water pipe 3 is extended and is coiled in the radiation heat transfer water pipe 4 on the sidewall around the shell 1.Preferably, also be provided with the hot gas turbulent flow passageway on the described heat collecting sheet 2.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, connects by connector between heat convection water pipe and radiation heat transfer water pipe, 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 will arrange the heat convection water pipe more and be arranged to single row configuration, so that the flue gas boundary layer is reduced to about original half, improves the coefficient of heat transfer between flue gas and heat convection water pipe; Simultaneously, change 11mm into by the aperture with the heat convection water pipe, the coefficient of heat transfer while improving between water pipe and current, can not cause complete machine discharge less than normal; Water cut-off temperature-rising and water temperature overshoot are risen, and affect comfortableness and the problem of the dry combustion method that occurs shutting down.
Calculate by theory, the heat exchanger that the present embodiment provides is compared with traditional heat exchanger, and average heat transfer coefficient has improved more than 17%; Get temperature difference rising 50K after the attenuation of flue gas boundary layer, its exchange capability of heat of preresearch estimates
Promote more than 26%.According to the 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%, thereby can alleviate the weight of water tank.The beneficial effect that brings for further specifying the present embodiment, we carry out the exchange capability of heat simulation to the heat exchanger after improving, as shown in Figure 7.We can see from this figure, in the situation that 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 the heat convection water pipe reduces to 5%, and heat exchange is even, and endothermic effect is good.
The above specific embodiment has been described in detail essence of the present invention, but can not come protection scope of the present invention is limited 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 improvement and modification all drop within the claim protection domain.
Claims (6)
1. the heat exchanger of a gas heater comprises: shell (1) is arranged on heat collecting sheet (2), the heat convection water pipe (3) of cover top portion, and is coiled in the radiation heat transfer water pipe (4) around the shell; It is characterized in that, described heat convection water pipe (3) is on average being arranged in the single row type setting of cover top portion, this heat convection water pipe (3) material be oxygen-free copper, its diameter is between 9mm-13mm; The height of described heat collecting sheet is between the 15mm-30mm, and the spacing between described heat collecting sheet is 1.5mm-2.0mm.
2. the heat exchanger of gas heater according to claim 1 is characterized in that, the quantity of described heat convection water pipe (3) is four or five.
3. 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.
4. the heat exchanger of gas heater according to claim 1 is characterized in that, is provided with the water turbulence sheet in described heat convection water pipe (3) and/or the radiation heat transfer water pipe (4); Described turbulent sheet be shaped as twisted shape.
5. the heat exchanger of gas heater according to claim 1 is characterized in that, described heat convection water pipe (3) the two ends one extend and be coiled in the radiation heat transfer water pipe (4) on the sidewall around the shell 1.
6. the heat exchanger of gas heater according to claim 1 is characterized in that, the aperture of described heat convection water pipe (3) is less than the aperture of described radiation heat transfer water pipe (4).
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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102901226A true CN102901226A (en) | 2013-01-30 |
| CN102901226B 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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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104110860A (en) * | 2013-08-21 | 2014-10-22 | 芜湖美的厨卫电器制造有限公司 | Gas water heater 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104110860A (en) * | 2013-08-21 | 2014-10-22 | 芜湖美的厨卫电器制造有限公司 | Gas water heater assembly and heat exchanger |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102901226B (en) | 2015-11-25 |
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