JPH0137653B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention mainly relates to an abnormality detection device for indoor-installed gas stoves, gas water heaters, and other combustors.

Conventionally, as this type of device, for example, JP-A-57-
192740, which includes a gas burner or other heat source within the combustor body, is equipped with a temperature fuse, high limit switch, or other detector to detect overheating or other abnormal conditions, and according to the operation of the detector. Types in which the heat source is deactivated are known, but in such a case, the detector has the disadvantage that it is likely to be repeatedly activated each time the abnormal condition occurs, causing damage to the detector. accompanied by. In addition, Japanese Patent Application Laid-Open No. 2003-19930 discloses a device that uses a delay timer to cause the combustion to stop after a predetermined period of time has elapsed after issuing the alarm.
It is known from Publication No. 53-139239. However, with this product, the time from the alarm occurrence to the combustion stop operation must be set based on experience, and abnormal combustion or abnormality due to lack of oxygen in the room, which is not necessarily proportional to the time, must be set based on experience. When detecting a temperature rise, etc. and performing a combustion stop operation, it often happens that the period from the occurrence of the alarm, that is, the display of the state on the verge of an abnormal condition, to the combustion stop operation does not match the actual state. If the alarm is issued earlier in order to reduce the danger, there will be problems such as an increase in the number of alarms.

The present invention aims to provide a device free of such inconveniences, and includes a combustor equipped with a gas burner or other heat source inside the combustor body, and a detector for detecting overheating or other abnormal conditions. In the heat source whose operation is stopped by the operation of the detector, the combustor is provided with an auxiliary detector for detecting a state on the verge of the abnormal state; Depending on the operation, lamps, buzzers, and other indicators are activated.

Embodiments of the present invention will be described with reference to the attached drawings. The drawing shows a case in which the combustor 1 is applied to a combustor consisting of a warm air blowing type gas stove installed indoors, and the combustor 1 has a heat source 3 consisting of a gas burner and a blower 4 inside the combustor main body 2 on the outer periphery. According to the operation of the heat source 3 and the blower 4, indoor air flows in from the inlet 6 having a filter 5 on the back side and flows into the heat source 3.
After being heated, the hot air is discharged forward from the front air outlet 7.

The combustor 1 is equipped with a detector 8 for detecting an abnormal condition, such as overheating, and the operation of the heat source 3 is stopped when the detector 8 is activated. To explain this in detail, in the illustrated case, the heat source 3
A gas passage 9 leading gas to the gas passage 9 is provided with an electromagnetically actuated on-off valve 10 for opening and closing the passage.
0 to give it a closing action. That is, according to the operation of the detector 8, the heat source 3
The gas supply was cut off and its operation stopped.

Although the above is not particularly different from the conventional one, according to the present invention, the combustor 1 is in a state on the verge of the abnormal state,
That is, when the abnormal condition is overheating, an auxiliary detector 12 is provided that detects a slightly lower temperature condition, and when the detector 12 operates, a lamp, buzzer, or other indicator 13 is activated, and the user is alerted to this. I made it possible to know.

To explain its operation, in the case of the above-mentioned type of combustor 1, the abnormal overheating state is often caused by the clogging of the above-mentioned filter 5.
The above-mentioned auxiliary detector 12 detects the impending condition, and according to its operation, the indicator 13 is activated, so that the user can know the above-mentioned clogging condition, and therefore the filter can be detected. Immediate cleaning of 5 prevents abnormal conditions from occurring next time. This is not limited to clogging of the filter 5, but is also substantially the same in the case of blockage of the ventilation system path by curtains, clothing, or other obstacles.

In yet another embodiment, the abnormal condition is an indoor oxygen deficiency condition. In this case, the detector 8 consists of a thermocouple 8a that is heated by the burner 3 or a constant-fire burner 3a cooperating with it, and the change in its output indicates that the safety valve 10a interposed in the gas passage 9 is activated. Although it is a closed type and is not particularly different from conventional ones in this point, according to the present invention, an auxiliary detector 12a consisting of a separate thermocouple for detecting a state on the verge of oxygen deficiency is provided, and the operation of the detector 12a is According to the above, the above-mentioned display 13 was activated. In this way, the state on the verge of oxygen deficiency can be known from the display 13, and at this time, the user can ventilate the room to prevent the oxygen deficiency state.

In this way, according to the present invention, an auxiliary detector is provided for detecting a state on the verge of an abnormal state of the combustor, separately from a detector for detecting an abnormal state of the combustor, which is provided to stop the operation of the heat source. , since the display is activated by the operation of the auxiliary detector,
It is possible to know the state on the verge of an abnormal state by using a lamp or other indicator, and it is possible to prevent the next abnormal state from occurring by, for example, cleaning the filter or ventilating the room. This eliminates the above-mentioned inconveniences of the conventional method in which the detector always waits for an abnormal state to operate, and in particular detects the abnormal state and the state on the verge of the abnormal state using separate detectors. Even if the transition speed of the state is slow, both can be handled appropriately, and the effect obtained by eliminating the inconvenience of having to issue an early warning in order to reduce the danger as in the conventional case is achieved. have

[Brief explanation of drawings]

FIG. 1 is a front view of an example of a combustor equipped with a device of the present invention, FIG. 2 is a cutaway side view thereof, and FIG. 3 is a control circuit diagram thereof. 1...Combustor, 2...Combustor main body, 3...Heat source, 8,
8a...Detector, 12, 12a...Auxiliary detector, 13
…display.

Claims (1)

[Claims] 1 A type of combustor that includes a gas burner or other heat source within the combustor body is equipped with a detector that detects overheating or other abnormal conditions, so that the operation of the heat source is stopped when the detector is activated. In this type, the combustor is equipped with an auxiliary detector for detecting a state on the verge of the abnormal state, and the operation of the auxiliary detector activates a lamp, buzzer, or other indicator. Abnormality detection device in combustor.