JPS63184196A - Incomplete combustion detecting system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an incomplete combustion detection system, and particularly to an incomplete combustion detection system that detects incomplete combustion in an indoor heater to ensure the safety of occupants.

(Prior Art) An indoor heater burns fuel such as kerosene in a burner and uses the combustion heat to heat the room.

However, when fuel undergoes incomplete combustion, indoor air becomes contaminated with soot and carbon monoxide, which has a negative impact on residents, and soot adheres to the heater's combustion tube and exhaust route, increasing exhaust resistance. This may lead to a decrease in thermal efficiency and even damage to the equipment.

For this reason, recently, heaters that use microcomputers to set the fuel-air mixture ratio to an appropriate value, or that take in air from outside to prevent oxygen deficiency and achieve complete combustion of fuel, have become popular. . Alarm systems have also been developed that install sensors indoors to detect toxic gases such as carbon monoxide, and use buzzers and lamps to notify residents of indoor contamination.

(Problems to be Solved by the Invention) However, although the conventional means can protect occupants to a certain extent, protection measures for the heater side have been insufficient.

The present invention has been made in view of the above circumstances, and its purpose is to detect incomplete combustion of combustion equipment reliably and thereby protect not only the safety of occupants but also the combustion equipment. The object of the present invention is to provide a detection system.

(Means for Solving the Problems) In order to achieve the above object, the incomplete combustion detection system of the present invention includes a carbon sensor having a pair of electrodes arranged with a predetermined gap in the path of combustion gas. , a current detection means for detecting the current flowing between the electrodes, an alarm means for notifying incomplete combustion of the combustion equipment, and an activation signal is sent to the alarm means in response to a detection signal from the current detection means, and the combustion equipment is activated. and a control means for stopping.

(Function) With these configurations, when incomplete combustion occurs in combustion equipment, carbon generated from the combustion gas becomes soot and adheres to the surface of the carbon sensor, and both electrodes are electrically connected via the carbon. . Therefore, a current flows between the pair of electrodes, the current detection means detects this, and sends a detection signal to the control means. Based on this detection signal, the control means sends an activation signal to the alarm means to issue an alarm to the occupants, and also sends a combustion stop signal to the combustion equipment to stop its operation.

(Example) FIG. 1 shows a heater 1o to which the incomplete combustion system of the present invention is applied.

The heater 10 has a top plate 11, a side plate 12, and a back plate 13 on the outside.
The lower part is supported on the floor by a lower stand 14. Further, the front surface of the heater 1o has a frontage, and a combustion tube 15 is arranged in the center thereof, and a pot-shaped burner 16 is installed in the lower part of the inside of the combustion tube 15.As can be seen from FIG. vibrator 1
A predetermined amount of fuel is supplied by an electromagnetic pump 19 that is connected to a fuel tank 18 via a fuel tank 7 and provided in a vibrator 17 . Although not shown, a pot-shaped burner 16
An ignition device is attached to the ignition switch 2 on the front of the lower stand.
Combustion starts when the value is set to 0 (Figure 1).

A radiant tube 21 having a large number of holes 21A is installed above the combustion tube 15, and the radiant tube 21 becomes red hot during combustion and emits radiant heat to the outside. A heat exchanger 22 is arranged above the radiant cylinder 21, and this heat exchanger 22 improves the thermal efficiency of the heater 10 by absorbing heat when the combustion gas flows out. Also,
The outside of the radiator cylinder 21 is covered with a heat-resistant glass cylinder 23, so that the combustion state can be visually checked from the outside.

An intake and exhaust pipe 24 is connected to the right side of the upper surface of the top plate 11, and the other end of the exhaust pipe 24 extends outdoors. Therefore, the combustion gas is transferred to the combustion tube 15, the radiant tube 21, the heat exchanger 22, and the exhaust tube 2.
4 and then discharged outdoors.

A curved reflection plate 25 is installed at the rear of the glass tube 23, and the radiant heat emitted from the radiation tube 21 to the rear and to the sides is reflected forward. A lattice-shaped front guard 26 is attached to the front opening of the heater 10, and an upper guard 27 is also fitted into the opening of the top plate 11.

On the other hand, an operation panel 28 is attached to the front right side of the lower stand 14, and operating sections such as an ignition switch 20° timer 29 are provided on the operation panel 28. Also, on the left side of the front of the lower stand 14, there is a buzzer 30 that notifies incomplete combustion of the pot-shaped burner 16, and a temperature control lever 31 that adjusts the temperature of the heater 1o.
is provided.

FIG. 2 shows an incomplete combustion detection system built into the heater 10, which includes a carbon sensor 32, a current detection circuit 33, a microcomputer 34,
and a buzzer 30.

The carbon sensor 32 includes an insulator 35 as shown in FIG.
It consists of a pair of electrodes 37 and 38 attached to an insulator 35 with a certain gap 36 in between, and is attached to the inner surface of the glass tube 23 as shown in FIG. Each electrode 37.3
8 is an elongated heat-resistant metal piece made of stainless steel or the like, and is connected to the current detection circuit 33 via lead wires 39 and 40. The two electrodes 37 and 38 of the carbon sensor 32 are normally in an insulated state, but when carbon 41 in the form of soot adheres and fills the gap 36, they become electrically connected, and the electrode 3
The current between 7.38 and 38 is detected by the current detection circuit 33.

The output side of the current detection circuit 33 is connected to a microcomputer 34 as shown in FIG. 2, and the microcomputer 34 sends control signals to the buzzer 30 and the electromagnetic pump 19 based on the detection signal of the current detection circuit 33.

The incomplete combustion detection system of this embodiment configured as described above operates as follows.

First, while the pot-shaped burner 16 of the heater 10 is completely burning, almost no carbon 41 is generated, so no current flows between the electrodes 37 and 38 of the carbon sensor 32.

Next, when the pot-shaped burner 16 causes incomplete combustion, the carbon 41 in the fuel that has not completely reacted with oxygen becomes soot and adheres to the carbon sensor 32. Since carbon 41 has electrical conductivity, when carbon 41 fills the gap 36 as shown in FIG. Sends a combustion detection signal. Based on this detection signal, the microcomputer 34 activates the buzzer 30 to notify the resident of the abnormality, and also activates the electromagnetic pump 19.
A stop signal is sent to the pot-shaped burner 16 to stop combustion.

By automatically stopping the heater 10, carbon deposition on the exhaust path is eliminated, and increase in exhaust resistance, decrease in thermal efficiency, and furthermore, damage to various devices due to abnormally high temperatures is prevented.

FIG. 4 shows a second embodiment of a carbon sensor 32, in which two wire electrodes 42, 43
are wound around an insulator 35 so as not to touch each other, and wire electrodes 42 and 43 are used both as electrodes and as lead wires. Also in this case, any gap 36 of the wire electrodes 42, 43
When carbon 41 is attached to the wire electrodes 42 and 43, the wire electrodes 42 and 43 become conductive, and the current detection circuit 33 detects the current. Note that the reason why the wire electrodes 42 and 43 have different thicknesses in FIG. 4 is to distinguish between the two, and they are actually the same.

The carbon sensor 32 may be attached to the inner surface of the heat exchanger 22 as shown in phantom in FIG. However, heat exchanger 2
2 is usually made of metal, so the carbon sensor 3 in Fig. 4
2, it is necessary to insert an insulating backing.

Furthermore, if a heater is used for the insulator 35, the carbon 41 attached to the carbon sensor 32 can be automatically removed with high heat. In this case, it is desirable to use heat-resistant ceramic or the like for the insulator 35.

In the above embodiment, an example was shown in which the incomplete combustion detection system was used in the heater 10, but the present invention can also be applied to other combustion equipment such as a water heater.

Alternatively, the pair of electrodes 37 and 38 may be directly attached to the glass tube 23 and the insulator 35 may be omitted. Furthermore, an alarm lamp or the like may be used instead of the buzzer 30.

(Effects of the Invention) As detailed above, the incomplete combustion detection system of the present invention includes a carbon sensor having a pair of electrodes arranged with a predetermined gap in the path of combustion gas, and a A current detection means for detecting a flowing current, an alarm means for notifying incomplete combustion of the combustion equipment, and a control means for sending an activation signal to the alarm means and stopping combustion of the combustion equipment in response to a detection signal from the current detection means. Since it is composed of
Incomplete combustion can be electrically detected from the carbon produced during incomplete combustion, which has the effect of not only ensuring the safety of residents but also protecting combustion equipment.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a heater to which the incomplete combustion detection system of the present invention is applied, Fig. 2 is a circuit diagram of the incomplete combustion detection system, Fig. 3 is a simplified diagram of a carbon sensor, and Fig. 4 is a FIG. 7 is a simplified diagram showing another example of a carbon sensor. 10... Heater 16... Pot-shaped burner 19.
...Electromagnetic pump 22...Heat exchanger 23...Glass tube 30...Buzzer 32...Carbon sensor 3
3... Current detection circuit 34... Microcomputer 35... Insulator 36... Gap between electrodes 37.
38... Electrode 41... Carbon 42.43...
Wire electrode patent applicant Sanden Co., Ltd. agent Patent attorney Yoshi 1) Yoshitaka Figure 1

Claims (7)

[Claims] (1) A carbon sensor that has a pair of electrodes arranged with a predetermined gap in the path of combustion gas, a current detection means that detects the current flowing between the electrodes, and an alarm that indicates incomplete combustion in combustion equipment. and control means for sending an activation signal to the alarm means and stopping combustion of the combustion equipment in response to a detection signal from the current detection means. (2) The incomplete combustion detection system according to claim (1), wherein the pair of electrodes is attached to an insulator. (3) Claim No. 2, wherein the insulator is a heater.
) Incomplete combustion detection system described in section 2. (4) The incomplete combustion detection system according to claim 2 or 3, wherein the pair of electrodes is attached to the surface of an insulator using two heat-resistant metal pieces. (5) The incomplete combustion detection system according to claim (2) or (3), wherein the pair of electrodes are wrapped around an insulator by a wire so that they do not come into contact with each other. (6) Claim No. 2, wherein the alarm means is a buzzer.
The incomplete combustion detection system described in item 1). (7) Claim No. 3, wherein the alarm means is a lamp.
The incomplete combustion detection system described in item 1).