CN201497165U - Coil heat exchange commercial gas water heater - Google Patents
Coil heat exchange commercial gas water heater Download PDFInfo
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- CN201497165U CN201497165U CN2009202306800U CN200920230680U CN201497165U CN 201497165 U CN201497165 U CN 201497165U CN 2009202306800 U CN2009202306800 U CN 2009202306800U CN 200920230680 U CN200920230680 U CN 200920230680U CN 201497165 U CN201497165 U CN 201497165U
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- heat exchange
- combustion chamber
- straight tube
- coil
- chamber straight
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- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
Abstract
The utility model relates to a coil heat exchange commercial gas heater and belongs to the technical field of water heaters. The water heater comprises a cylindrical water storage casing; a vertical combustion chamber straight tube is arranged at the center of the water storage casing; a combustor is mounted at the upper end of the combustion chamber straight tube, and the lower end of the combustion chamber straight tube is communicated with one end of a helical heat exchange coil surrounding the straight tube; the other end of the heat exchange coil is communicated with an external fume exhaust pipeline; and the combustion chamber straight tube is connected with one end of the heat exchange coil through a reducing pipe. Therefore, when fume passes through, the flow speed, the flow capacity and the flow direction are gradually changed along the diameter of the tube, and partial pressure is reduced, so that the massive concentration of the heat of the fume is avoided, the damage caused by excessive concentration of the fume is further prevented, and the service life of the heat exchange coil is effectively prolonged.
Description
Technical field
The utility model relates to a kind of gas heater, and the commercial gas heater of especially a kind of coil pipe heat exchange belongs to technical field of water heaters.
Background technology
The water supply capacity of commercial water heater is obviously greater than pot-type boiler.Retrieval is found, the patent No. be US5735237 U.S. Patent Publication the commercial gas heater of a kind of coil pipe heat exchange, vertical combustion chamber straight tube is settled at the columniform water storage housing of this water heater center, the upper end of this combustion chamber straight tube is connected with burner, the lower end is communicated with helical form heat exchange coil one end around this straight tube, and the other end of this heat exchange coil is communicated with outside smoke discharging pipe.During work, the flue gas of combustion chamber output is by heat exchange coil, and discharges after the abundant heat exchange of the water in the water storage housing, thereby realizes the heating of hot water.Its compact conformation, the heat exchange efficiency height, thereby receive an acclaim.
Yet experimental study shows that this water heater remains in following problem:
1, between combustion chamber and the heat exchange coil without any buffer structure, so its junction is too concentrated easily because of heat easily and is damaged.
2, the combustion chamber caliber can not be greater than 5 inches, and the diameter of heat exchange coil can only be the combustion chamber half, therefore can cause the problems such as instability or detonation of lighting a fire.
The utility model content
The purpose of this utility model is: at the problem that above-mentioned prior art exists, propose the commercial gas heater of coil pipe heat exchange of a kind of good operating stability, long service life.
In order to reach above purpose, the commercial gas heater of coil pipe heat exchange of the present utility model comprises columniform water storage housing, and vertical combustion chamber straight tube is settled at the center of described water storage housing; The upper end of described combustion chamber straight tube is connected with burner, and the lower end is communicated with a end around the helical form heat exchange coil of described combustion chamber straight tube; The other end of described heat exchange coil is communicated with outside smoke discharging pipe.Its improvements are: described combustion chamber straight tube is connected with an end of heat exchange coil by reducing pipe.Like this, flue gas is when flowing through this place, and flow velocity, flow, the flow direction all gradually change along caliber, local pressure is reduced, thereby avoided flue gas heat a large amount of concentrated, and then prevented from too to concentrate the damage that causes, effectively prolonged the service life of heat exchange coil because of heat at this place.
The utility model further improves, and the diameter of described heat exchange coil is 38-90 millimeter (more preferably greater than 2.5 inches), and heat exchange coil is 1 with the diameter ratio of combustion chamber straight tube: 2-3.5.The heat exchange coil diameter of original technology is less than 2.5 inches, and caliber is too small, and on-way resistance is excessive, and required power needs corresponding increase, therefore must be in bigger wind friction velocity down-firing burning, and the result causes easy detonation or extinguishes.Can guarantee igniting of the application's water heater and combustibility all-the-time stable according to fluid principles and the definite above-mentioned parameter of analysis of experimental data.
The utility model further improves, and the number of turns around the combustion chamber straight tube of described heat exchange coil is the 5-10 circle.Can guarantee that like this heat exchange area and burden requirement are complementary.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further described.
Fig. 1 is the structural representation of an embodiment of the utility model.
Fig. 2 is the coil pack structural representation among Fig. 1 embodiment.
Fig. 3 is the A-A cutaway view of Fig. 2.
Fig. 4 is the reducing pipe structural representation among Fig. 1 embodiment.
The specific embodiment
Embodiment one
The commercial gas heater of the coil pipe heat exchange of present embodiment is welded the center of the cylindrical water storage housing that constitutes and settles vertical combustion chamber straight tube 6 as shown in Figure 1 by inner bag loam cake 10, inner bag lower cover 11 and inner bag shell 9.The water storage housing is covered with shell 12.Burner 5 is equipped with in the upper end of combustion chamber straight tube 6, and the lower end is communicated with (referring to Fig. 2, Fig. 3, Fig. 4) with a end around the helical form heat exchange coil 7 of this combustion chamber straight tube 6 by reducing pipe 13 welding.The other end of heat exchange coil 7 is communicated with outside smoke discharging pipe and condensed water discharge outlet 8.The diameter of heat exchange coil 7 should be selected between the 38-90 millimeter according to the specification of water heater, and present embodiment heat exchange coil diameter is actual to be 3.5 inches, i.e. 88.9mm; The diameter of combustion chamber straight tube 6 and heat exchange coil 7 is than should selecting between 2-3.5 according to the specification of water heater, and present embodiment actual diameter ratio is 2.3.The number of turns around combustion chamber straight tube 6 of heat exchange coil 7 should be selected between the 5-10 circle according to the specification of water heater, and present embodiment is actual to be 8 circles.
The concrete structure of reducing pipe 13 as shown in Figure 4, integral body is bowl-type, the diameter of outside diameter and combustion chamber straight tube matches, end diameter matches with the diameter of shining right coil pipe.
Facts have proved, the water heater gas fume after burning of present embodiment is when flowing through combustion chamber and heat exchange coil joining place, flow velocity, flow, the flow direction are all along bowl-type reducing pipe rounding off, gradually change, local pressure is reduced, and its effect is better than conventional taper reducing pipe, thereby has avoided flue gas heat a large amount of concentrated at this place, and then prevented from too to concentrate the damage that causes because of heat, effectively prolonged the service life of heat exchange coil.And suitably determining such as key design parameters such as the diameter ratio of coil diameter, heat exchange coil and combustion chamber straight tube, the heat exchange coil number of turns, overcome that the too small on-way resistance that causes of original technology caliber is excessive, heat exchange area and negative coupling is unreasonable, igniting is unstable or defectives such as detonation easily, help further to guarantee the stability of water heater igniting and combustibility.
In addition, the burner 5 of present embodiment is furnished with air conveying fan 2, the combustion gas control air valve 3 that is placed on the shell 12 and makes air and the Venturi tube of combustion gas mixing 4.Reliable in order to guarantee igniting, by the control of 1 pair of blower fan wind speed of controller, realize the 1/5-1 of igniting wind speed for the burning wind speed.If the igniting wind speed falls when hanging down, the flame of lighting is easily blown out or detonation when wind speed increases to the burning wind speed.By calculating and the fire trial to when igniting fan pressure head, the proportionate relationship that draws igniting wind speed and burning wind speed is 1/5-1, and this ratio has guaranteed that not only ignition noise is reduced to minimum, and can be so that carry out the transition to fired state stably from fired state.
In addition to the implementation, the utility model can also have other embodiments.All employings are equal to the technical scheme of replacing or forming, and all drop on the protection domain of the utility model requirement.
Claims (6)
1. the commercial gas heater of coil pipe heat exchange comprises columniform water storage housing, and vertical combustion chamber straight tube is settled at the center of described water storage housing; Burner is equipped with in the upper end of described combustion chamber straight tube, and the lower end is communicated with a end around the helical form heat exchange coil of described combustion chamber straight tube; The other end of described heat exchange coil is communicated with outside smoke discharging pipe; It is characterized in that: described combustion chamber straight tube is connected with an end of heat exchange coil by reducing pipe.
2. according to the commercial gas heater of the described coil pipe heat exchange of claim 1, it is characterized in that: the diameter of described heat exchange coil is the 38-90 millimeter, and described heat exchange coil is 1 with the diameter ratio of combustion chamber straight tube: 2-3.5.
3. according to the commercial gas heater of the described coil pipe heat exchange of claim 2, it is characterized in that: the number of turns around the combustion chamber straight tube of described heat exchange coil is the 5-10 circle.
4. according to the commercial gas heater of the described coil pipe heat exchange of claim 3, it is characterized in that: described reducing pipe is bowl-type, and the diameter of outside diameter and combustion chamber straight tube matches, and end diameter matches with the diameter that changes right coil pipe.
5. according to the commercial gas heater of the described coil pipe heat exchange of claim 4, it is characterized in that: described water storage housing is covered with shell, and described burner is furnished with air conveying fan, the combustion gas control air valve that is placed on the shell and makes air and the Venturi tube of combustion gas mixing.
6. according to the commercial gas heater of the described coil pipe heat exchange of claim 5, it is characterized in that: the igniting wind speed of described blower fan is the 1/5-1 of burning wind speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202306800U CN201497165U (en) | 2009-08-26 | 2009-08-26 | Coil heat exchange commercial gas water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202306800U CN201497165U (en) | 2009-08-26 | 2009-08-26 | Coil heat exchange commercial gas water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201497165U true CN201497165U (en) | 2010-06-02 |
Family
ID=42440370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202306800U Expired - Lifetime CN201497165U (en) | 2009-08-26 | 2009-08-26 | Coil heat exchange commercial gas water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201497165U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103822349A (en) * | 2012-11-19 | 2014-05-28 | A.O.史密斯公司 | Water heater and pressure probe for a water heater |
| CN103868228A (en) * | 2014-03-26 | 2014-06-18 | 艾欧史密斯(中国)热水器有限公司 | Volumetric gas water heater |
-
2009
- 2009-08-26 CN CN2009202306800U patent/CN201497165U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103822349A (en) * | 2012-11-19 | 2014-05-28 | A.O.史密斯公司 | Water heater and pressure probe for a water heater |
| US10281351B2 (en) | 2012-11-19 | 2019-05-07 | A. O. Smith Corporation | Water heater and pressure probe for a water heater |
| CN103868228A (en) * | 2014-03-26 | 2014-06-18 | 艾欧史密斯(中国)热水器有限公司 | Volumetric gas water heater |
| CN103868228B (en) * | 2014-03-26 | 2017-04-12 | 艾欧史密斯(中国)热水器有限公司 | Volumetric gas water heater |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100602 |
|
| CX01 | Expiry of patent term |