CN102829540A

CN102829540A - Fuel gas hot water device

Info

Publication number: CN102829540A
Application number: CN2011101603040A
Authority: CN
Inventors: 叶远璋; 余国保
Original assignee: Guangdong Vanward New Electric Co Ltd
Current assignee: Guangdong Vanward New Electric Co Ltd
Priority date: 2011-06-15
Filing date: 2011-06-15
Publication date: 2012-12-19
Anticipated expiration: 2031-06-15
Also published as: CN102829540B

Abstract

The invention relates to a fuel gas hot water device which comprises a fan, a heat exchanger and a fuel gas inlet pipe, wherein the heat exchanger is internally provided with combustion chambers, and an air outlet of the fan and a fuel gas outlet of the fuel gas inlet pipe are communicated with the combustion chambers. The main technical characteristics of the fuel gas hot water are as follows: the combustion chambers comprise a large combustion chamber and a small combustion chamber, wherein the volume of the small combustion chamber is 4%-30% of that of the large combustion chamber, and the large combustion chamber is communicated with the small combustion chamber; and the fuel gas inlet pipe comprises a primary fuel pipe and a secondary fuel pipe, a primary fuel gas outlet of the primary fuel pipe and the air outlet of the fan are communicated with the small combustion chamber, and a secondary fuel gas outlet of the secondary fuel pipe is communicated with the large combustion chamber. The fuel gas hot water device provided by the invention has the advantages of effectively enabling combustion of fuel gas to be sufficient, effectively improving heat efficiency, effectively reducing generation of NOX, etc.

Description

Gas-fired water heater

Technical field

This patent relates to a kind of gas-fired water heater, particularly a kind of domestic gas hot water apparatus.

Background technology

In the prior art, the domestic gas hot water apparatus adopts the flaming combustion mode usually, when burning produces heat; Discharge visible flame light; The part chemical energy of combustion gas is converted into visible luminous energy, and visible light can not add hot water, has wasted the part chemical energy of combustion gas in fact; Flaming combustion produces the torch or the tongues of fire, and the high-temperature region concentrates on the tongues of fire or torch position, and high-temperature temperature is too high, is prone to produce NO _XDeng emission; The ignition temperature field is inhomogeneous simultaneously, causes to exist burning insufficient, influences the raising of the gas-fired water heater thermal efficiency, is prone to produce NO _XEtc. defective.For overcoming these defectives, gas-fired water heater is improved.

Summary of the invention

This patent technical problem to be solved is that a kind of gas-fired water heater will be provided, and it can make fuel gas buring more abundant effectively, improves the thermal efficiency of gas-fired water heater, reduces NO _XProduce.

The technical scheme that its technical problem that solves this patent adopts is: a kind of gas-fired water heater; It comprises blower fan, heat exchanger, advances Gas Pipe, is provided with the combustion chamber in the heat exchanger, and the gas outlet of blower fan, the gas port that goes out of advancing Gas Pipe are communicated with the combustion chamber; Described combustion chamber is provided with large-scale combustion chamber and small combustion chamber; The volume of described small combustion chamber is 4%～30% of large-scale combustion chamber, and the large-scale combustion chamber is communicated with small combustion chamber, describedly advances Gas Pipe and comprises primary fuel pipe and secondary fuel pipe; The gas outlet that once goes out gas port and blower fan of primary fuel pipe is communicated with small combustion chamber, and the secondary of secondary fuel pipe goes out gas port and is communicated with the large-scale combustion chamber.

The volume of described small combustion chamber is 8%～25% of large-scale combustion chamber.

Described large-scale combustion chamber is communicated with through through hole with small combustion chamber.

Described through hole is cylindrical hole or threaded hole.

Described small combustion chamber adopts high-alumina brick, silica brick, complex silicon carbide, corundum, magnesia brick or high insulating ceramic material to process.

The quantity of described secondary fuel pipe is 2～10.

The valve of control gaseous-pressure is installed on described primary fuel pipe and the secondary fuel pipe.

Described valve is manually-operated gate or electrically operated valve.

This patent is compared the beneficial effect that is produced with background technology: because this patent adopts the combustion chamber to be provided with large-scale combustion chamber and small combustion chamber, the large-scale combustion chamber is communicated with small combustion chamber, advances Gas Pipe and comprises primary fuel pipe and secondary fuel pipe; The gas outlet that once goes out gas port and blower fan of primary fuel pipe is communicated with small combustion chamber; The secondary of secondary fuel pipe goes out the structure that gas port is communicated with the large-scale combustion chamber, and small combustion chamber air excess coefficient is higher, forms lean burn; Normal temperature combustion gas in the small combustion chamber and air are transformed into higher temperature and than the mixed air of low oxygen content; The high-temperature low-oxygen mixed air gets in the large-scale combustion chamber through intercommunicating pore, and going out gas port with the secondary of secondary fuel pipe, to replenish the secondary combustion gas that gets into mixed, further forms the burning under the high-temperature low-oxygen condition; Reduce and discharge visible flame light; So it can make fuel gas buring more abundant effectively, improve the thermal efficiency of gas-fired water heater, reduce NO _XProduce.

Description of drawings: Fig. 1 is the structural representation of this patent.

The specific embodiment: shown in accompanying drawing 1; Present embodiment comprises blower fan 1, heat exchanger 7, advances Gas Pipe 11, is provided with combustion chamber 2 in the heat exchanger 7, and combustion chamber 2 is provided with large-scale combustion chamber 6 and small combustion chamber 4; Large-scale combustion chamber 6 is communicated with small combustion chamber 4; Advance Gas Pipe 11 and comprise primary fuel pipe 10 and secondary fuel pipe 8, the gas outlet 12 that once goes out gas port and blower fan 1 of primary fuel pipe 10 is communicated with small combustion chamber 4, and the secondary of secondary fuel pipe 8 goes out gas port and is communicated with large-scale combustion chamber 6.

The volume of small combustion chamber 4 can be 4%～30% of large-scale combustion chamber 6, as 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29% or 30%.

Large-scale combustion chamber 6 is communicated with through through hole 5 with small combustion chamber 4, and through hole 5 can be regular holes such as cylindrical hole or threaded hole, also can be irregular hole.

Described small combustion chamber 4 adopts high heat-insulating materials such as high-alumina brick, silica brick, complex silicon carbide, corundum, magnesia brick or high insulating ceramic to process.

The quantity of described secondary fuel pipe 8 is 2～10, as 2,3,4,5,6,7,8,9 or 10.

The valve 9 of control gaseous-pressure is installed on primary fuel pipe 10 and the secondary fuel pipe 8, and valve 9 can be manually-operated gate or electrically operated valve, thereby control gets into the amount of combustion chamber 2 combustion gas.

The secondary that once goes out gas port and secondary fuel pipe 8 of primary fuel pipe 10 goes out gas port nozzle 3 can be housed; Blower fan 1 guarantees that the more air of the combustion gas injection that once goes out the gas port ejection of primary fuel pipe 10 gets into fully burning in the small combustion chamber 4; Because small combustion chamber 4 air excess coefficients are higher; Form lean burn, normal temperature combustion gas in the small combustion chamber 4 and air are transformed into higher temperature and than the mixed air of low oxygen content, the high-temperature low-oxygen mixed air is through in the through hole entering large-scale combustion chambers 65; Going out gas port with the secondary of secondary fuel pipe 8, to replenish the secondary combustion gas that gets into mixed; Form the burning under the high-temperature low-oxygen condition, reduce release visible flame light, further can realize flameless combustion.Heat exchange takes place through heat exchanger 7 in the high-temperature flue gas that burning produces, and last flue gas is discharged gas-fired water heater through smoke exhaust pipe.

Owing to can produce flameless combustion, do not produce flame light, the chemical energy of combustion gas is converted into heat energy, and the chemical energy of combustion gas does not cause waste.Flameless combustion does not produce the torch or the tongues of fire, and the high-temperature region disperses, and high-temperature temperature is difficult for producing NO _XDeng emission, the ignition temperature field is even simultaneously, helps burning more fully and the raising of the gas-fired water heater thermal efficiency.

Claims

1. gas-fired water heater; It comprises blower fan (1), heat exchanger (7), advances Gas Pipe (11); Be provided with combustion chamber (2) in the heat exchanger (7); The gas outlet (12) of blower fan (1), the gas port that goes out of advancing Gas Pipe (11) are communicated with combustion chamber (2), it is characterized in that described combustion chamber (2) is provided with large-scale combustion chamber (6) and small combustion chamber (4), and small combustion chamber (4) volume is 4%～30% of large-scale combustion chamber (a 6) volume; Large-scale combustion chamber (6) is communicated with small combustion chamber (4); Describedly advance Gas Pipe (11) and comprise primary fuel pipe (10) and secondary fuel pipe (8), the gas outlet (12) that once goes out gas port and blower fan (1) of primary fuel pipe (10) is communicated with small combustion chamber (4), and the secondary of secondary fuel pipe (8) goes out gas port and is communicated with large-scale combustion chamber (6).

2. gas-fired water heater according to claim 1, the volume that it is characterized in that described small combustion chamber (4) are 8%～25% of large-scale combustion chamber (6).

3. gas-fired water heater according to claim 2 is characterized in that described large-scale combustion chamber (6) is communicated with through through hole (5) with small combustion chamber (4).

4. gas-fired water heater according to claim 3 is characterized in that described through hole (5) is cylindrical hole or threaded hole.

5. according to each described gas-fired water heater of claim 1～4, it is characterized in that described small combustion chamber (4) adopts high-alumina brick, silica brick, complex silicon carbide, corundum, magnesia brick or high insulating ceramic material to process.

6. according to each described gas-fired water heater of claim 1～4, the quantity that it is characterized in that described secondary fuel pipe (8) is 2～10.

7. gas-fired water heater according to claim 5, the quantity that it is characterized in that described secondary fuel pipe (8) is 2～10.

8. gas-fired water heater according to claim 7 is characterized in that being equipped with on described primary fuel pipe (10) and the secondary fuel pipe (8) valve (9) of controlling gaseous-pressure.

9. gas-fired water heater according to claim 6 is characterized in that described valve (9) is manually-operated gate or electrically operated valve.

10. gas-fired water heater according to claim 7 is characterized in that described valve (9) is manually-operated gate or electrically operated valve.