JPH102553A - Kerosene boiler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To permit the improvement of response property of a temperature detecting means with respect to abnormal combustion by preventing an exhausting unit from becoming an abnormal high temperature in accordance with the abnormal combustion of a kerosene burner. SOLUTION: A kerosene boiler is provided with a fan 5, a kerosene burner 3, to which combustion air is supplied by the fan 5, a fuel supplying means 4, supplying kerosene fuel to the kerosene burner 3, a heat exchanger 6, heated by the combustion of the kerosene burner 3, a muffler 7, connected to the heat exchanger 6, and an exhausting unit 18, discharging combustion waste gas, passing through the muffler 7. Further, the kerosene boiler is provided with a temperature detecting means 30, detecting the internal temperature of the muffler 7, and an abnormal time fire extinguishing means 43, stopping the combustion of the kerosene burner 3 when the internal temperature of the muffler 7, which is detected by the temperature detecting means 30, has risen to a value higher than a predetermined temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil boiler such as an oil boiler, a hot water heating system and the like, and more particularly to a safety device for an oil boiler.

[0002]

2. Description of the Related Art In this type of oil boiler, for example,
As disclosed in JP-A-4-270861, a blower, a gun-type oil burner to which combustion air is supplied by the blower, fuel supply means for supplying oil fuel to the oil burner, a water chamber, A heat exchanger having a combustion chamber and a plurality of flue tubes connected to the combustion chamber, for heating water in the water chamber or circulating water for hot water heating by burning the oil burner; and a heat exchanger connected to the heat exchanger. Installed silencers,
There is known an exhaust system that includes an exhaust unit that exhausts combustion exhaust gas that has passed through the silencer. When the oil boiler is installed indoors and the supply and exhaust of the oil burner is performed outdoors using a supply / exhaust tube, or when it is installed outdoors and the supply and exhaust of the oil burner is performed outdoors, When the air supply passage is blocked due to freezing, the combustion state of the oil burner is deteriorated due to insufficient air supply, soot is generated, and the soot may adhere to the smoke tube of the heat exchanger and become clogged. In that case, even after the freezing of the air supply passage, poor combustion of the oil burner continues due to the increase in exhaust resistance due to the adhesion of soot to the smoke tube,
In the worst case, there is a concern that the exhaust part such as the exhaust pipe becomes abnormally high at about 600 ° C. and becomes red hot.

[0003] The inventors of the present invention mounted a temperature detector such as a bimetal thermostat on the outer surface of the silencer through which the combustion exhaust gas from the heat exchanger passes, and the temperature detector used to reduce the outer surface temperature of the silencer to a predetermined temperature. Attempts were made to stop the burning of the oil burner by using the fire extinguishing means when the ascent rises, but the sound absorbing material made of ceramic fiber, glass fiber, etc. is attached to the inner surface of the silencer. Therefore, this sound absorbing material becomes a heat insulating material, not only the response of the temperature detector is poor, but also the outer surface temperature of the silencer,
Since the difference between normal combustion and abnormal combustion is small, there is a problem that it is difficult to set the temperature of a temperature detector for operating the forced fire extinguishing means.

The present invention has been made in view of the above-mentioned circumstances, and it is possible to prevent the temperature of the exhaust gas from being abnormally high due to the abnormal combustion of the oil burner. The purpose is to be able to increase responsiveness.

[0005]

According to the present invention, a blower, an oil burner to which combustion air is supplied by the blower, a fuel supply means for supplying oil fuel to the oil burner, An oil boiler comprising: a heat exchanger heated by combustion of a burner; a silencer connected to the heat exchanger; and an exhaust unit configured to discharge combustion exhaust gas passing through the silencer. Temperature detecting means for detecting the internal temperature of the oil silencer; and abnormal time fire extinguishing means for stopping combustion of the oil burner when the internal temperature of the muffler detected by the temperature detecting means rises above a predetermined temperature. Configuration.

According to the present invention, a blower is provided.
An oil burner to which combustion air is supplied by the blower,
Fuel supply means for supplying oil fuel to the oil burner;
An oil boiler comprising: a heat exchanger heated by combustion of an oil burner; a muffler connected to the heat exchanger; and an exhaust unit configured to discharge combustion exhaust gas passing through the muffler. Temperature detecting means for detecting the internal temperature of the device, and when the internal temperature of the muffler detected by the temperature detecting means rises above a predetermined temperature, the operation of the fuel supply means without after-purging the blower. An emergency fire extinguishing means for stopping and stopping the combustion of the oil burner.

[0007] In the present invention according to claim 3, the blower,
An oil burner to which combustion air is supplied by the blower,
Fuel supply means for supplying oil fuel to the oil burner;
An oil boiler comprising: a heat exchanger heated by combustion of an oil burner; a muffler connected to the heat exchanger; and an exhaust unit configured to discharge combustion exhaust gas passing through the muffler. Temperature detection means for detecting the internal temperature of the device, and when the internal temperature of the muffler detected by the temperature detection means rises above a predetermined temperature, abnormal fire extinguishing means for stopping the combustion of the oil burner, A notification means for notifying that the combustion has been stopped by the abnormal time fire extinguishing means is provided.

According to the present invention, a blower is provided,
An oil burner to which combustion air is supplied by the blower,
Fuel supply means for supplying oil fuel to the oil burner;
An oil boiler comprising: a heat exchanger heated by combustion of an oil burner; a muffler connected to the heat exchanger; and an exhaust unit configured to discharge combustion exhaust gas passing through the muffler. Temperature detecting means for detecting the internal temperature of the device, and abnormal-time fire extinguishing means for stopping combustion of the oil burner when the internal temperature of the muffler detected by the temperature detecting means rises above a predetermined temperature. The temperature detecting means includes a heat transfer rod having a distal end inserted into the muffler, and a temperature detector provided at the other end of the heat transfer rod.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is an internal configuration diagram of an oil hot water heating heat source device showing an example of an oil boiler to which the present invention is applied, 1 is an oil hot water heating heat source device,
The oil hot water heating heat source device 1 has a box-shaped outer case 2 provided with a detachable top plate 2A, a gun type oil burner 3 in the outer case 2, and a petroleum fuel Pump 4 (fuel supply means) for supplying oil, blower 5 for supplying combustion air to oil burner 3, oil burner 3
A can body 6 (heat exchanger) heated by combustion of the can body, a muffler 7 connected to an upper portion of the can body 6, a circulation pump 8, and the like are accommodated.

The can body 6 has a water chamber 9, a combustion chamber 10, and a plurality of smoke tubes 11, 11 connected to the combustion chamber 10 and penetrating the upper part of the water chamber 9. The circulating water for heating whose temperature has increased in 9 is sent out from an outlet 12 provided in the upper part of the water chamber 9 by the operation of the circulating pump 8 and is sent to a radiator (not shown) such as a floor heating radiator. After being supplied and radiated by the radiator, it is returned to the water chamber 9 from a return port 13 provided at a lower portion of the water chamber 9. The can 6
Is provided with a hot water temperature detector 6S for detecting the temperature of the circulating water in the water chamber 9.

A lower end of an air supply duct 14 is connected to the blower 5 at a suction port thereof, and an upper end of the air supply duct 14 is connected to one end of an air supply pipe 15 as shown in FIG. Is connected, and the other end of the air supply pipe 15 is
It is connected to the indoor side connection portion 16B of the air supply / exhaust tube 16 which penetrates the wall A of the house and exposes the front end air supply / exhaust portion 16A to the outside.

The silencer 7 is detachably connected to the can 6 and covers a cylindrical outer cylinder 17 made of a metal plate, an opening on the upper surface of the outer cylinder 17, and has a substantially central portion. A detachable canopy 19 provided with an exhaust gas outlet tube 18, a throttle plate 21 disposed at an intermediate position in the outer tube 17 and provided with a combustion exhaust gas passage tube 20 at a central portion, 17
And a plurality of cylindrical sound absorbing members 22 and 23 arranged above and below the outer peripheral portion of the diaphragm plate 21 along the inner peripheral surface of the diaphragm plate 21. Each of the sound absorbing members 22 and 23 is formed of a glass fiber formed in a tubular shape. First and second baffle plates 24 and 25 are mounted on both upper and lower surfaces of the aperture plate 21 at a predetermined interval from the passage barrel 20.

The exhaust pipe 18 of the canopy 19 is connected to an exhaust pipe 27 through a connecting pipe 26 as shown in FIG.
And the other end of the exhaust pipe 27 is connected to a connection portion 16B of the air supply / exhaust tube 16 on the indoor side.

Reference numeral 28 denotes a heat transfer rod having a length of about 90 mm, which penetrates the outer cylinder 17 of the silencer 7 and whose tip 28A is inserted near the center of the silencer 7. A copper rod is used, and its surface is subjected to nickel plating. The base 28B of the heat transfer rod 28 located outside the outer cylinder 17 of the silencer 7 has approximately 180
An exhaust gas temperature detector 29 made of a bimetallic thermostat which is turned off at a temperature of 0 ° C. is mounted in a heat conductive relationship.
Temperature detecting device 30 (temperature detecting means) for detecting the internal temperature of the exhaust gas, that is, the temperature of the flue gas passing through the silencer 7
Is composed. 31 is a packing provided on the outer periphery of the heat transfer rod 28.

Reference numeral 32 denotes an operation section which is provided on the upper front surface of the outer case 2 and also serves as a display section.
As shown in FIG. 4, on the operation panel 33, a power switch 34 also serving as a reset switch, a test operation switch 35 of the circulation pump 8, a power lamp 36 which is turned on when the power is turned on, A combustion lamp 37 that is turned on when the burner 3 is in a combustion state, and a decidal indicator 38 composed of a plurality of seven segments are provided.

A control device 39 controls the combustion of the oil burner 3, the operation of the circulation pump 8, and the like. The control device 39 includes a microcomputer 40. Detector 6S, flame detector 41,
An anti-seismic automatic fire extinguisher 42, a power switch 34, a test run switch 35, an exhaust gas temperature detector 29, and the like are connected. On the output side, an igniter 43 that ignites the oil burner 3;
Blower 5, fuel pump 4, circulation pump 8, combustion lamp 3
7, a power lamp 36, a decimal display 38 and the like are connected. Further, when the off signal of the exhaust gas temperature detector 29 is input to the microcomputer 40, the microcomputer 40 immediately stops energizing the blower 5 and operates the fuel pump 4 without after-purging the blower 5. Emergency fire extinguishing means 4 for stopping the operation of the oil burner 3 for emergency stop
3 built-in.

Next, the operation of the oil hot water heating heat source unit 1 will be described. First, when the power switch 34 is turned on, the power lamp 36 is turned on and the circulating pump 8 starts operating. Here, when the temperature detected by the hot water temperature detector 6S is equal to or lower than a predetermined temperature (for example, about 60 ° C.), the blower 5 is operated. The air is sucked into the blower 5 through the air supply pipe 15 and the air supply duct 14 and supplied to the oil burner 3. Then, after a lapse of the pre-purge time of the blower 5, the igniter 43 starts spark discharge, and the fuel pump 4 operates to start burning the oil burner 3. With the start of combustion of the oil burner 3, the temperature of the circulating water in the water chamber 9 rises, and the circulating water whose temperature has risen is sent out from the outlet 12 by the operation of the circulation pump 8, and is radiated by a radiator such as a floor heating radiator. (Not shown), and after being radiated by the radiator, returned to the water chamber 9 through the return port 13.

On the other hand, the combustion exhaust gas from the oil burner 3 flows from the combustion chamber 10 through the smoke pipes 11 and 11 into the silencer 7, and when passing through the silencer 7, the temperature of the heat transfer rod 28 rises. At the same time, combustion noise and the like are absorbed by the sound absorbing materials 22 and 23, and the combustion exhaust gas that has passed through the silencer 7 is exhausted by the exhaust gas outlet tube 18, the connection tube 26, and the exhaust pipe 27.
Through the air supply / exhaust tube 16 to the outside.

Here, when the temperature detected by the hot water temperature detector 6S exceeds a predetermined temperature, the power switch 34 is turned off, or the anti-seismic automatic fire extinguishing device 42 is activated, the operation of the fuel pump 4 is stopped, and The burner 3 stops burning, but when these fires are extinguished, the power supply to the blower 5 is stopped after the elapse of the after-purge time.

When the temperature of the base 28B of the heat transfer rod 28 becomes about 180 ° C. or higher and the exhaust gas temperature detector 29 is turned off, an off signal of the exhaust gas temperature detector 29 is input to the microcomputer 40, The abnormal-time fire extinguishing means 43 incorporated in the microcomputer 40 instantaneously stops the supply of power to the blower 5 and allows the fuel pump 4 to operate without after-purge of the blower 5.
To stop the operation of the oil burner 3 and stop the operation,
At this time, as shown in FIG. 4, the decimal display 38 displays “E7” which is a symbol of an error display to notify that the oil burner 3 has stopped burning due to the operation of the abnormal time fire extinguishing means 43. I do.

The decimal display 38 indicates "1".
"1" indicates a normal state, "00" indicates a blinking display, a test operation state of the circulation pump 8, "E1" indicates no ignition, and "E2".
And the operation of the anti-seismic automatic fire extinguisher 42 is notified by the display "E4".

According to the present embodiment, the oil hot water heating heat source unit 1 includes a blower 5, a gun-type oil burner 3 to which combustion air is supplied by the blower 5, and the oil burner 3
Pump 4 for supplying oil fuel to the tank, a can body 6 in which the circulating water in the water chamber 6 is heated by the combustion of the oil burner 3, and a muffler detachably connected to the upper part of the can body 6 in a detachable manner. The device 7 includes an exhaust gas outlet tube 18, a connection tube 26, an exhaust pipe 27, and the like for discharging combustion exhaust gas that has passed through the silencer 7. A temperature detecting device 30 including a heat transfer rod 28 for detecting the internal temperature of the silencer 7 and an exhaust gas temperature detector 29, and the internal temperature of the silencer 7 detected by the temperature detecting device 30 is a predetermined temperature. Since it is provided with the abnormal-state fire extinguishing means 43 for stopping the combustion of the oil burner 3 when it rises as described above, for example,
The soot adheres to the smoke tubes 11, 11 of the
If the oil burner 3 abnormally burns due to an increase in the exhaust resistance of the oil, the abnormal rise in the internal temperature of the silencer 7 is detected by the temperature detector 3.
If it is detected as 0, the abnormal-time fire extinguishing means 43 can stop the combustion of the oil burner 3 in an emergency. Therefore, it is possible to prevent the exhaust parts such as the exhaust gas outlet tube 18, the connection tube 26, and the exhaust pipe 27 from being brought to an abnormally high temperature due to the abnormal combustion of the oil burner 3, and furthermore, the temperature detection device 30 is provided with the muffler 7 Since the internal temperature can be detected instead of the external surface temperature, the responsiveness to abnormal combustion of the petroleum burner 3 can be improved, and the safety can be further improved.

When the off signal of the exhaust gas temperature detector 29 is input to the microcomputer 40, the abnormal-time fire extinguishing means 43 incorporated in the microcomputer 40 instantaneously stops energizing the blower 5, Since the operation of the fuel pump 4 is stopped and the combustion of the oil burner 3 is urgently stopped without after-purging the oil burner 5, when the combustion of the oil burner 3 is stopped by the abnormal-state fire extinguishing means 43, fresh air is supplied to the muffler 7. The supply of air can be extremely reduced, and ignition in the silencer 7 can be prevented. That is, inside the silencer 7, sound absorbing materials 22 and 23 made of glass fiber that easily penetrates petroleum fuel are accommodated.
2 and 23 are impregnated with petroleum fuel that cannot be burned at the time of ignition, petroleum fuel scattered at the bottom of the combustion chamber 10 and then liquefied, and the like.
The petroleum fuel impregnated in 2 and 23 does not ignite during normal combustion of the petroleum burner 3 due to contact with the combustion exhaust gas containing little oxygen. However, when the internal temperature of the silencer 7 becomes higher than that during normal combustion, the petroleum fuel that has been subjected to the sound absorbing materials 22 and 23 ignites by touching the oxygen-rich fresh air supplied by the after-purge of the blower 5, and Although the combustion of the burner 3 is stopped, there is a danger that a fire may occur in the silencer 7. Such an ignition phenomenon inside the silencer 7 could be avoided by urgently stopping the combustion of the oil burner 3 without after-purging the blower 5.

When the burning of the oil burner 3 is stopped by the emergency fire extinguishing means 43, "E7" is displayed on the digital display 38 to indicate that. Thus, it is possible to confirm at a glance that the oil burner 3 has abnormally burned due to the adhesion of soot to the inside of the can 6 due to the fact that the combustion has been stopped.

Further, the temperature detecting device 30 includes a tip 2
8A is composed of the heat transfer rod 28 inserted into the muffler 7 and the exhaust gas temperature detector 29 attached to the base 28B of the heat transfer rod 28 in a heat conductive relationship. The internal temperature of the silencer 7 can be reliably detected with a simple configuration while improving the responsiveness to abnormal combustion.

[0026]

According to the first aspect of the present invention, there is provided an oil boiler, a blower, an oil burner to which combustion air is supplied by the blower, fuel supply means for supplying oil fuel to the oil burner, and combustion of the oil burner. A heat exchanger heated by the heat exchanger, a silencer connected to the heat exchanger, and an exhaust unit for discharging combustion exhaust gas passing through the silencer, wherein the internal temperature of the silencer is And an abnormal-state fire extinguishing means for stopping combustion of the oil burner when the internal temperature of the muffler detected by the temperature detecting means rises above a predetermined temperature. Therefore, if the oil burner abnormally burns due to adhesion of soot inside the heat exchanger, etc., the abnormal rise in the internal temperature of the silencer is detected by the temperature detecting means,
The fire extinguishing means can stop the burning of the oil burner, which not only prevents the exhaust section from becoming abnormally high, but also detects the internal temperature of the silencer by the temperature detecting means. The responsiveness to abnormal combustion is improved, and safety can be further improved.

[0027] In the oil boiler according to the second aspect,
A blower, a petroleum burner to which combustion air is supplied by the blower, a fuel supply means for supplying petroleum fuel to the petroleum burner, a heat exchanger heated by the combustion of the petroleum burner, and a heat exchanger connected to the heat exchanger. In a petroleum boiler provided with a silencer provided and an exhaust unit for discharging combustion exhaust gas passing through the silencer, a temperature detecting means for detecting an internal temperature of the silencer, and a temperature detected by the temperature detecting means. And an abnormal fire extinguishing means for stopping the operation of the fuel supply means and stopping the combustion of the oil burner without after-purging the blower when the internal temperature of the silencer rises above a predetermined temperature. Therefore, in addition to the function and effect of claim 1, when the combustion of the oil burner is stopped by the fire extinguishing means at abnormal time, the supply of fresh air into the silencer becomes extremely small, and Of danger from fire can be avoided.

[0028] In the oil boiler according to the third aspect,
A blower, a petroleum burner to which combustion air is supplied by the blower, a fuel supply means for supplying petroleum fuel to the petroleum burner, a heat exchanger heated by the combustion of the petroleum burner, and a heat exchanger connected to the heat exchanger. In a petroleum boiler provided with a silencer provided and an exhaust unit for discharging combustion exhaust gas passing through the silencer, a temperature detecting means for detecting an internal temperature of the silencer, and a temperature detected by the temperature detecting means. An abnormal fire extinguishing means for stopping the combustion of the oil burner when the internal temperature of the silencer rises above a predetermined temperature, and a notifying means for notifying that the combustion has been stopped by the abnormal fire extinguishing means. With this configuration, in addition to the effects of the first aspect, it is possible to clearly notify that the oil burner has abnormally burned due to the adhesion of soot to the inside of the can body.

[0029] In the oil boiler according to the fourth aspect,
A blower, a petroleum burner to which combustion air is supplied by the blower, a fuel supply means for supplying petroleum fuel to the petroleum burner, a heat exchanger heated by the combustion of the petroleum burner, and a heat exchanger connected to the heat exchanger. In a petroleum boiler provided with a silencer provided and an exhaust unit for discharging combustion exhaust gas passing through the silencer, a temperature detecting means for detecting an internal temperature of the silencer, and a temperature detected by the temperature detecting means. Abnormal fire extinguishing means for stopping the combustion of the oil burner when the internal temperature of the silencer rises above a predetermined temperature, wherein the temperature detecting means has a tip with a transmission end inserted inside the silencer. Since it is constituted by the heat rod and the temperature detector provided at the other end of the heat transfer rod, in addition to the function and effect of claim 1, the internal temperature of the silencer is reduced by a simple structure, and , Reliably detect Door can be.

[Brief description of the drawings]

FIG. 1 is an internal configuration diagram of an oil hot water heating heat source unit showing an embodiment of an oil boiler to which the present invention is applied.

FIG. 2 is an enlarged sectional view of a main part of the same.

FIG. 3 is a block diagram of the control device.

FIG. 4 is a front view of the operation unit.

FIG. 5 is an explanatory diagram for explaining an installation state of the oil hot water heating heat source unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heated oil heating water heater unit 3 Gun type oil burner (oil burner) 4 Fuel pump (fuel supply means) 5 Blower 6 Can body (heat exchanger) 7 Silencer 18 Exhaust gas outlet tube (exhaust part) 28 Heat transfer rod 29 Exhaust gas Temperature detector (temperature detector) 30 Temperature detector (temperature detecting means) 38 Digital display (notification means) 43 Fire extinguishing means at abnormal time

Continued on the front page (72) Inventor Hideki Ito 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Norifumi Monma 2-5-2-5 Keihanhondori, Moriguchi-shi, Osaka Inside Sanyo Electric Co., Ltd. (72) Masato Ima 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Prefecture Inside Sanyo Electric Co., Ltd. (72) Hiroshi Nakayama 2-5-2 Keihanhondori, Moriguchi-shi, Osaka Prefecture No. 5 Sanyo Electric Co., Ltd.

Claims (4)

[Claims] 1. A blower, an oil burner to which combustion air is supplied by the blower, fuel supply means for supplying oil fuel to the oil burner, a heat exchanger heated by combustion of the oil burner, In a petroleum boiler provided with a silencer connected to an exchanger and an exhaust unit for discharging combustion exhaust gas passing through the silencer, temperature detecting means for detecting an internal temperature of the silencer; An oil fired boiler, comprising: an abnormal time fire extinguishing means for stopping the combustion of the oil burner when the internal temperature of the muffler detected by the means rises above a predetermined temperature. 2. A blower, an oil burner to which combustion air is supplied by the blower, fuel supply means for supplying oil fuel to the oil burner, a heat exchanger heated by combustion of the oil burner, In a petroleum boiler provided with a silencer connected to an exchanger and an exhaust unit for discharging combustion exhaust gas passing through the silencer, temperature detecting means for detecting an internal temperature of the silencer; When the internal temperature of the muffler detected by the means rises to a predetermined temperature or more, an abnormal fire extinguishing means for stopping the operation of the fuel supply means and stopping the combustion of the oil burner without after-purging the blower. An oil boiler characterized by being equipped. 3. A blower, an oil burner to which combustion air is supplied by the blower, fuel supply means for supplying oil fuel to the oil burner, a heat exchanger heated by combustion of the oil burner, In a petroleum boiler provided with a silencer connected to an exchanger and an exhaust unit for discharging combustion exhaust gas passing through the silencer, temperature detecting means for detecting an internal temperature of the silencer; Means for stopping combustion of the oil burner when the internal temperature of the muffler detected by the means rises above a predetermined temperature, and a notification for notifying that the combustion has been stopped by the abnormal time fire-extinguishing means. And an oil boiler. 4. A blower, an oil burner to which combustion air is supplied by the blower, fuel supply means for supplying oil fuel to the oil burner, a heat exchanger heated by combustion of the oil burner, In a petroleum boiler provided with a silencer connected to an exchanger and an exhaust unit for discharging combustion exhaust gas passing through the silencer, temperature detecting means for detecting an internal temperature of the silencer; When the internal temperature of the muffler detected by the means has risen to a predetermined temperature or more, the fire extinguishing means for stopping the combustion of the oil burner; and the temperature detecting means has a tip inside the muffler. An oil boiler comprising: a heat transfer rod inserted into the heat transfer rod; and a temperature detector provided at the other end of the heat transfer rod.