JP2587321Y2 - Combustion equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion device such as a water heater or a bath kettle.

[0002]

2. Description of the Related Art FIG. 8 shows a general combustion device such as a water heater. In FIG. 1, a burner device 2 is arranged below the combustion chamber 1, and a supply / exhaust fan 3 is attached below the burner device 2. As shown in FIG. 7, the burner device 2 is constituted by arranging a plurality of burners 4 into a unit, and a gas nozzle 6 is disposed opposite to a gas inlet 5 of each burner 4.
, The fuel gas is supplied to the corresponding burner 4. The burner device 2 burns gas using air supplied from the fan 3, and heats water flowing from the water supply pipe 7 through the heat exchanger 8 with the combustion thermal power of each burner 4 to make hot water. This hot water is guided to a desired place such as a kitchen through a hot water supply pipe 19 and supplied.

[0003]

In the combustion of the burner device 2, for example, when the amount of air mixed with the fuel gas is increased and the gas concentration is reduced, a flame is generated from the flame opening of the combustion surface of each burner 4. Floating and causing a lift phenomenon,
A backfire phenomenon occurs in which the flame flows backward to the gas inlet 5 side. In particular, backfire occurs and gas is
Combustion result in gas inlet 5, is very dangerous for the passage of the burner apparatus and gas from overheating damage.

[0004] The present invention has been made to solve the above-mentioned problem, and the purpose of the invention is to produce a backfire and a fuel.
It is an object of the present invention to provide a combustion apparatus that can reliably and instantaneously detect when fuel gas is burned at a gas inlet and take safety measures.

[0005]

The present invention is configured as follows to achieve the above object. That is, the combustion apparatus of the present invention, the fuel gas inlet of the burner device flame detection sensor for detecting a backfire Bas <br/> over Na flame retardant
Almost all sections from one end of the feed gas inlet to the other end
The present invention is characterized in that the flame detection sensor is a frame rod or a thermal fuse.

[0006]

In the present invention having the above-described structure, backfire occurs due to some cause during combustion of the combustion device, and the fuel
When the fuel gas burns at the gas inlet , the flame detection sensor detects this backfire accurately and instantaneously and outputs a detection signal. Using this detection signal, it is possible to take safety measures against backfire, for example, by shutting off gas.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. In the following description of the embodiments, the same reference numerals are given to the same names as those in the conventional example, and the overlapping description will be omitted. FIG. 1 shows a main configuration of a first embodiment of the combustion apparatus according to the present invention, and the components other than those shown in FIG. In FIG. 1, the burner device 2 has a box-shaped case 9, and the inside of the case 9 is partitioned by a partition 10 into a first premixing chamber 11 and a second premixing chamber 12. Gas introduction passages 13 and 14 project from the premixing chambers 11 and 12 below the case 9.
A gas introduction means 16 for fuel gas is provided at the gas introduction port 15.

As shown in FIG. 1A, for example, the gas introduction means 16 has a gas nozzle 6 disposed opposite to the gas introduction port 15, and a stirrer is provided between the gas nozzle 6 and the gas introduction port 15. It can be configured as having the mixer 17 interposed. As shown in FIG. 2, the stirring mixer 17 is configured by arranging a plurality of stirring blades 40 obliquely on the inlet sides of the gas introduction passages 13 and 14. This gas introduction means
In the case of 16, the fuel gas ejected from the gas nozzle 6 is agitated with air by the agitating mixer 17 and sent to the introduction passages 13 and 14, and while passing through the respective premixing chambers 11 and 12, the fuel gas and the air are mixed. To produce a uniform concentration of the premixed gas.

Further, as another configuration of the gas introducing means 16,
As shown in FIG. 1B, a swirl mixer is provided at the gas inlet 15.
A configuration having 18 is also possible. This swirl mixer 18
As shown in FIG. 3, a baffle plate 21 is provided on the tip side of the fuel supply pipe 20, and a plurality of gas ejection holes 22 are provided on the outer periphery of the fuel supply pipe 20 immediately below the baffle plate 21 to form the gas nozzle 6. A swirler (swing guide blade) 23 is arranged around the gas ejection hole 22 to swirl the air sent from the fan 3 along the swirler 23 and eject the swirling air radially from the gas ejection hole 22. The fuel gas is collided with the fuel gas to be stirred at right angles to be stirred and mixed. The swirled mixed gas is sent to the gas introduction passages 13 and 14 while swirling, and the fuel gas and the air are uniformly mixed while passing through the premixing chambers 11 and 12. Is to be mixed.

A plurality of gas outlets 24a and 24b are arranged on the outlet side of the premixing chambers 11 and 12, and a gas outlet 24a of the first premixing chamber 11 is provided with a gas outlet having a high fuel gas concentration. A plurality of first burners 25 for burning the mixed gas are connected,
A plurality of second burners 26 for burning a premixed gas having a low fuel gas concentration are connected to the gas outlet 24b of the premixing chamber 12, and a row of burners 25, 26 is attached to the case 9.

[0011] characteristic feature of the present invention, the gas introduced
Flame detector to detect burner flame backfire in mouth
Introduces a flame detection sensor consisting of a head and a temperature fuse, etc.
Crossing almost the entire section from one end to the other end of the mouth
In this embodiment, a flame detection sensor 27 including a frame rod, a temperature fuse, and the like for detecting a backfire of a burner flame is provided in the gas inlet 15.
It is provided in a form that crosses the entire section from one end side to the other end side
Tei Ru.

When the flame detection sensor 27 is constituted by a frame rod, when the burner flame returns to the gas nozzle 6 from the flame hole and burns at the gas inlet 15 , this fire current is sensed to turn on the signal. Is output as a flame detection signal. When the flame detection sensor 27 is formed of a temperature fuse, when the burner flame burns at the gas inlet 15 , the heat fuse blows due to the heat and the energized state is cut off. Output as a signal. The flame detection signal from the flame detection sensor 27 is applied to a control device (not shown). When receiving the flame detection signal, the control device closes the solenoid valve in the gas passage leading to the gas nozzle 6 to shut off the gas, thereby ensuring safety against backfire.

As described above, the flame detection sensor is connected to the gas inlet 15.
27 crosses the entire section from one end to the other end of the gas inlet
The fuel gas burns at the gas inlet 15 due to the backfire of the burner flame, which is extremely dangerous.
When such a state occurs, it can be detected immediately and appropriate safety measures can be taken, so that the reliability of safety in the combustion operation can be sufficiently enhanced.

FIG. 4 shows a second embodiment of the present invention. This embodiment employs a first burner 25 as shown in FIG.
And the burner port forming surfaces 32 and 33 of the second burner 26 are formed in a V-shape so as to face each other to form a connection burner 34.
Are arranged in the case 9 and attached. Also in this embodiment, a first premixing chamber 11 and a second premixing chamber 12 are formed by partitioning the inside of the case 9 by a partition wall 10 and each premixing chamber 1
As in the first embodiment, a stirring mixer 17 system or a vortex mixer 18 is provided on the gas introduction port 15 side of the introduction passages 13 and 14 of 1 and 12.
System gas introduction means 16, and a flame detection sensor 27 is provided at the gas introduction port 15 for the entire section from one end of the gas introduction port to the other end.
It is arranged in a transverse configuration . A gas outlet 24a leading to the first premixing chamber 11 and a second
A pair of gas outlets 24b communicating with the premixing chamber 12 on the left and right sides is defined as a pair of gas outlets 24a on the first premixing chamber 11 side and gas on the second premixing chamber 12 side in the longitudinal direction. The outlets 24b and the outlets 24b are arranged alternately, and a connection burner 30 is attached above the gas outlets 24a, 24b of each pair of the case 9,
A burner row is formed in which first burners 25 and second burners 26 are alternately arranged in the longitudinal direction.

In this embodiment, the flame detection sensor 27 is connected to the gas inlet.
15 shows the entire section from one end of the gas inlet 15 to the other end.
By arranging in a crossing manner, the backfire of the burner flame is reliably detected, and the backfire detection signal can be used to ensure safety against the backfire.

FIG. 6 shows a main configuration of a third embodiment of the present invention. In this embodiment, a V-shaped groove 28 is formed in the center of the upper surface of the case 9 of the burner device 2 so as to extend in the longitudinal direction of the case 9, and the left and right upper wall surfaces 30a, 30 sandwiching the groove 28 are formed.
b, the burner installation holes 31 are arrayed and formed.
The burner 29 is inserted and mounted on the base 31 in an upright manner to form a burner row. The case 9 has a box shape with a bottom opening, and a case base 35 is attached to the lower surface of the case 9.
The lower surface opening is closed. One or more (two in this figure) holes 36 serving as fuel gas inlets are arranged in the longitudinal direction at the left and right central portions of the case stand 35. The holes 36 are provided with a stirring mixer or a swirling mixer. (In this figure, the swirl mixer
18) Gas introduction means 16 is provided. And, in manner across each hole 36 on the upper surface of the case base 35 in this embodiment, i.e., the fuel gas inlet from one end to the other end
A flame detection sensor 27 including a frame rod, a thermal fuse, and the like is provided so as to cross the entire section .

In this embodiment, a premixed gas of fuel gas and air stirred by the swirling mixer 18 provided in each hole 36 is supplied to each burner 29 through the space in the case 9 to perform combustion. Will be When the backfire of the burner flame occurs and the flame flows backward through the internal space of the case 9 to the swirl mixer 18 and blows out, the backfire is immediately detected by the flame detection sensor 27, and the backfire is detected. The safe operation is performed in the same manner as in the above embodiments.

As described above, in each of the above embodiments, the fuel gas ejected from the gas nozzle 6 is uniformly stirred and mixed in the premixing chamber in the case 9, and the stirred premixed gas is supplied to the outlet side of the premixing chamber. Since it is configured to supply a plurality of burners corresponding to the premix gas, a premixed gas to be supplied to a large number of gas burners can be produced by a small number of gas nozzles 6 such as one or two. Thus, for example, in the case of the burner apparatus as shown in FIG. 7, the one gas nozzle 6 for one burner 4 corresponds, one
In other words, each burner 4 must have a gas inlet.
Therefore, when it is desired to detect the backfire of each burner 4, it is necessary to provide a flame detection sensor 27 at the gas inlet of each burner 4. Therefore, the number of flame detection sensors 27 is required by the number of burners 4. As described above, since the number of nozzles 6 , that is, the number of gas inlets can be extremely reduced as compared with the number of burners, the number of the flame detection sensors 27 can be reduced, and the manufacturing and assembling of the apparatus is very simple. It will be easier.

The present invention is not limited to the above embodiments, but can take various embodiments. For example, in each of the above-described embodiments, the burner device is provided with the inside of the case 9 as a premixing chamber to constitute a combustion device.
And a flame detection sensor 27 may be provided at the gas inlet 5 of each burner 4 in the burner row. However, in this case, as described above,
The number of flame detection sensors 27 is required by the number of burners, and the device configuration is more complicated than in the case of this embodiment.

In each of the above embodiments, a description has been given of a combustion device for a water heater, but the present invention is also applicable to other combustion devices such as a bath kettle, a gas air conditioner and the like.

[0021]

[Effect of the invention The present invention is, the other end or a flame detection sensor in the fuel gas inlet <br/> the burner unit from one end of the fuel gas inlet
Because it is provided in a form that crosses almost all sections in
Backfire occurs in the burner flame, gas flame flows back
From the scan inlet when ejected toward the gas nozzle side, its
Since the flame of the flame contacts the flame detection sensor surely, it can be detected immediately (instantly) and reliably, and the flame detection signal of the flame detection sensor is used to take appropriate safety measures such as gas shutoff. Since the operation can be performed, the reliability of safety against combustion of the combustion device can be greatly increased. Further, as described above, the flame detection sensor is connected to the fuel gas inlet.
Fuel gas by backfire
Burn at the gas inlet and perform safe operation such as gas shutoff.
Reliable detection by flame detection sensor only when it is necessary
be able to. On the other hand, for example, backfire
Is detected in the area near the flame hole inside the burner.
If provided, the burner flame is in the area
If a flashback occurs momentarily, that is,
A small backfire that does not need to do all the work
Back fire by the above flame detection sensor
Although it is detected and there is no need to perform safe operation,
Safety operations such as gas shutoff are frequently performed, making it easy to use
However, in the present invention,
Since the flame detection sensor is installed at the fuel gas inlet as
Must perform safe actions against
Ensure that only the case is detected by the above flame detection sensor
And the deterioration of usability can be avoided. Further
Also, a flame detection sensor is installed at the fuel gas inlet as described above.
As a result, the following effects can be obtained.
That is, a plurality of burners are unitized and the burners
A configuration with fewer fuel gas inlets than
In the burner device of the present invention, the above-mentioned flame detection sensor
When installed in a nearby area, the flame detection sensor
Is required, and the equipment configuration becomes complicated.
While the present invention is troublesome,
Since a flame detection sensor is provided at the fuel gas inlet,
The number of output sensors is smaller than the number of burners,
Complexity can be prevented, and the equipment can be manufactured and assembled.
The effect that it becomes easy can be produced.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a main part configuration of a first embodiment of a combustion apparatus according to the present invention.

FIG. 2 is an explanatory diagram illustrating an example of a stirring mixer as a gas introduction unit.

FIG. 3 is an explanatory diagram showing an example of a swirl mixer as a gas introduction means.

FIG. 4 is an explanatory diagram showing a main configuration of a second embodiment of the present invention.

FIG. 5 is an explanatory diagram of a burner structure of the embodiment.

FIG. 6 is a perspective view of a main part showing a third embodiment of the present invention.

FIG. 7 is an explanatory diagram of a general burner device.

FIG. 8 is a schematic explanatory view of a general combustion device.

[Explanation of symbols]

 2 Burner device 5 Gas inlet 6 Gas nozzle 9 Case 25 First burner 26 Second burner 27 Flame detection sensor 29 Burner

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F23N 5/02 341 F23N 5/02 310 F23N 5/12 F23N 5/24 106 F23D 14/82

Claims (3)

(57) [Scope of request for utility model registration] 1. A burner apparatus for a fuel gas inlet for detecting a backfire of the burner flame flame detection sensor fuel moth
Crosses almost the entire section from one end to the other
A combustion device provided in a form . 2. The combustion device according to claim 1, wherein the flame detection sensor comprises a frame rod. 3. The combustion device according to claim 1, wherein the flame detection sensor comprises a thermal fuse.