JP2601600Y2 - Combustion safety device for 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 safety device for a combustion device, such as an indoor water heater, for ensuring safety against carbon monoxide gas.

[0002]

2. Description of the Related Art FIG. 5 shows a schematic structure of a water heater generally known as a combustion device, and FIG. 6 shows a usage mode in which the water heater 1 is installed in a room of a building. ing.

[0003] This type of water heater 1 sends indoor air to a burner 4 through a filter 3 by the rotation of a fan 2 and burns a fuel gas supplied to the burner 4 to heat a heat exchanger 5. The water passing through the heat exchanger 5 is turned into hot water, and hot water is supplied to a desired place such as a kitchen through a hot water supply pipe connected to the outlet of the heat exchanger 5. The combustion operation of the water heater is performed by a control device 6, and a remote control 7 is connected to the control device 6.

When installing this water heater 1 indoors,
The base of the chimney 10 is fitted to and fitted to the exhaust outlet tube 8 of the water heater 1, and the end of the chimney 10 is taken out of the building to take in the indoor air and discharge the exhaust gas burned out of the building. I have to. When the chimney 10 is taken out, as shown in FIG. 6, a wall hole may be opened near the water heater 1 and the tip of the chimney 10 may be protruded out of the wall hole. Depending on the structure, as shown by the broken line, the chimneys 10 are joined together and the ceiling is attached, and the chimney 10
A construction method is also adopted in which the tip of the is projected outside the building.

[0005] When this type of water heater 1 is operated for combustion, carbon monoxide gas (hereinafter referred to as CO gas) is generated. In a state where exhaust gas is completely exhausted through the chimney 10, the effect of CO gas in the room does not occur. However, if a gap is formed at the seam of the chimney 10 or the seam comes off, the (chimney) There is a danger that the CO gas will flow back into the room (through the space above the ceiling if 10 is passed above the ceiling) and cause CO gas poisoning.

For this reason, conventionally, as shown in FIG. 5, a CO sensor 11 is installed on the exhaust side of the water heater 1, and an alarm is issued when the concentration of CO gas in the exhaust gas reaches a dangerous concentration. And safety measures such as stopping the combustion operation are taken.

[0007]

However, conventional safety measures for CO gas do not operate safely even if the CO gas leaks into the room as long as the CO gas concentration in the exhaust gas does not reach the dangerous concentration. There was a problem that was not. According to medical research reports, oxygen, which is normally associated with hemoglobin, is replaced by carbon monoxide taken into the lungs by respiration, and when hemoglobin bound to carbon monoxide exceeds 25% of the hemoglobin in the blood, A dangerous state is reached, and the time to reach this dangerous state is short in a case where the CO gas concentration in the atmosphere is high, and is exposed to the atmosphere containing the CO gas for a long time even when the CO gas concentration is low. Accordingly, it has been reported that the concentration of hemoglobin bound to carbon monoxide gradually increases and reaches a dangerous state after a certain period of time.

[0008] In the conventional safety device, when the CO gas concentration in the exhaust gas reaches the dangerous concentration, the combustion stop operation is certainly performed to ensure safety, but the CO gas concentration lower than the dangerous concentration is indoors. If a leak occurs, the safety device will not operate and if you are in a room where CO gas is leaking for a long time, C
There is a danger that the O-hemoglobin concentration will be raised to a lethal dose.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to respond to the degree of leakage of CO gas even when CO gas having a concentration lower than the dangerous concentration leaks into a room. It is an object of the present invention to provide a combustion safety device for a combustion device that can detect a dangerous state by performing a safety operation.

[0010]

Means for Solving the Problems The invention of the present patent application in order to achieve the above object, is constructed as follows. That is, the combustion safety device for a combustion device according to the first invention includes a CO sensor provided on the exhaust passage side of the combustion device for detecting the concentration of carbon monoxide gas in the exhaust gas, and a CO sensor detected by the CO sensor. The value corresponding to the detected concentration of carbon oxide gas
A CO concentration accumulating section that accumulates regardless of the presence or absence of abnormal combustion; and an alarm output section that outputs an alarm signal when the cumulative operation value during a predetermined sampling period reaches a set reference value by the CO concentration accumulating section. It is characterized by having . Also, the combustion safety of the combustion device of the second invention is described.
The device is installed on the exhaust passage side of the combustion equipment and
CO sensor that detects the concentration of carbon monoxide gas
Detection concentration of carbon monoxide gas detected by CO sensor
Detection value processing unit that converts degrees into points according to their levels
And the value pointed by this detection value processing unit
CO concentration accumulating section for accumulating, and this CO concentration accumulating section
Is used to calculate the accumulated operation value during the predetermined sampling period.
An alarm output unit that outputs an alarm signal when the reference value is reached.
It is characterized by having. In addition, the third
The combustion safety device of the combustion equipment of the invention was
On the roadside to reduce the concentration of carbon monoxide gas in the exhaust gas.
The CO sensor to be detected and the CO sensor
The value corresponding to the detected concentration of carbon monoxide gas
The CO concentration accumulation operation unit and the CO concentration accumulation operation unit
The accumulated operation value during the predetermined sampling period becomes the set reference value.
An alarm output unit for outputting an alarm signal when the alarm signal is reached;
The detection level of carbon oxide gas is set to a low level value given in advance.
The CO concentration accumulation calculation when the number of times continuously drops below the set number
Resets the cumulative calculation value of CO concentration obtained by the section
And means for performing the operation.
Further, a combustion safety device for a combustion device according to the fourth invention is provided as described above.
Smell having the configuration of the first or second or third invention
Te, the CO sensor that is installed in a building room
It is configured as a feature .

[0011]

In the present invention having the above-described structure, the concentration of CO gas in the exhaust gas of the combustion equipment or in the room of the building is detected by the CO sensor. An accumulation operation relating to the CO concentration is performed by the concentration accumulation operation unit. When the cumulative calculation value for the CO concentration during the sampling period reaches a preset reference value, a warning signal is output from the warning output unit, and the warning signal is used to notify the danger of CO gas and stop the combustion. Are performed.

[0012]

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 parts as those of the conventional example are denoted by the same reference numerals, and detailed description thereof will be omitted. FIG. 1 shows a block configuration of a first embodiment of the combustion safety device according to the present invention. The combustion safety device according to the present embodiment includes a CO sensor 11, a circuit unit 12, and a notification unit 13. The CO sensor 11 is shown in FIG.
And an indoor type water heater 1 as shown in FIG.
And detects the CO gas concentration in the exhaust gas.

The circuit unit 12 includes a sensor control unit 14, a sampling designation unit 15, a detection value processing unit 16, a CO concentration accumulation operation unit 17, a memory 18, and an alarm output unit 20. ing. The sensor control unit 14 energizes the CO sensor 11 and maintains the CO sensor 11 in a constantly detectable state.

The sampling designating section 15 informs the detection value processing section 16 of the sampling timing of the data given in advance, and instructs the CO concentration accumulation calculating section 17 to reset at the end of the sampling period given in a predetermined manner. Add.

As shown in FIG. 2A, the CO sensor 11
Accordingly, when the CO gas concentration in the exhaust gas is detected (the actual detected CO gas concentration of the CO sensor 11 does not fluctuate as shown in the figure, but in order to make the explanation easy to understand,
For example, when the sampling time t _S is added from the sampling designating unit 15 to the detection value processing unit 16, the detection value processing unit 16 is illustrated.
Is the sampling time t _{S as} shown in FIG.
Raw data of the CO detection concentration of the CO sensor 11 is fetched every time. Then, in the present embodiment, weight processing is performed on the captured data. For example, the CO detection concentration is divided stepwise, and a point 0 is given to 0 to less than 200 ppm, a point 1 is given to 200 to less than 500 ppm, and 500 to less than 500 ppm.
Point 2 is given to 1000 ppm, and point 3 is given to 1000 ppm or more, and the captured data is converted into the number of points as shown in FIG.

The CO concentration accumulation operation unit 17 performs an accumulation operation by adding the number of points converted into points by the detection value processing unit 16 each time sampling is performed. FIG. 3C shows the state of the cumulative calculation. The memory 18 stores a value required when data is processed by the detection value processing unit 16 as necessary, and also stores a cumulative calculation result of the CO concentration cumulative calculation unit 17.

The alarm output section 20 has a first set reference value and a second set reference value.
Are set, and these reference values and CO
The cumulative operation value of the concentration accumulation operation unit 17 is compared with the accumulated operation value, and when the accumulated operation value of the CO concentration reaches the first set reference value, a first alarm signal is added to the notifying means 13 and the accumulated operation value of the CO concentration is calculated. When the second reference value is reached, a second alarm signal is output. The notifying means 13 includes appropriate means such as a lamp, a liquid crystal display panel, and a buzzer. When a first alarm signal is applied from the alarm output section 20, the lamp blinks and a message indicating a CO concentration danger state is displayed on the liquid crystal display panel. , Buzzer sound alarm, etc.
A notification operation for the danger of the CO concentration according to each notification means is performed. When a second alarm signal is output from the alarm output section 20, the second alarm signal is applied to the control device 6 or the remote controller 7 of the water heater 1, and a safety operation such as stopping combustion is performed. In this embodiment, the sampling period T ₀
When low-level data of the CO concentration is sampled Following a predetermined number of times during a combustion operation (e.g., 0 when the point is followed by three consecutive times) is set to expire, the time T ₀ At the end, sampling command section 1
5 is to add a reset signal to the CO concentration accumulation operation unit 17 and
Reset and delete the accumulated operation value of the concentration accumulation operation unit 17,
The accumulation operation is newly started from the next sampling time.

According to this embodiment, C in the combustion exhaust gas
Even when the O concentration is lower than the dangerous concentration, the point value corresponding to the CO detection concentration is added and accumulated every data sampling, and when the accumulated operation value reaches the first set reference value, an alarm signal is issued. Since the warning is issued to inform the user of the danger, the person in the room can open the window and perform ventilation to prevent CO gas poisoning. Further, even when the person in the room does not notice the notification operation of the notification means 13, when the cumulative calculation value of the CO concentration reaches the second set reference value, the safety operation such as the stop of combustion is performed. The concentration of CO hemoglobin in it does not lead to a dangerous state and is very safe.

FIG. 4 shows a second embodiment of the present invention. In the second embodiment, the CO sensor 11 is provided on the circuit unit 12 side, and is installed in a room where the water heater 1 is installed. The other configuration is the same as that of the first embodiment. . By installing the CO sensor 11 in the room as described above, the CO gas concentration leaking into the room can be directly detected and the safe operation can be performed in the same manner as in the first embodiment. It is very safe even if CO gas is leaking. In particular, by installing the CO sensor 11 in a room, for example, when using a combustion device that takes in room air and discharges exhaust gas burned into the room, such as an instantaneous water heater, C discharged
Since the safe operation is performed by directly detecting the O concentration, it is very effective in safety measures.

It should be noted that the present invention is not limited to the above embodiments, and various embodiments can be adopted. For example, in the above embodiment, when the detection value processing unit 16 captures the CO concentration detection data of the CO sensor 11, the raw data is captured as it is. For example, as shown in FIG. Sampling time is 1 / n (1/2 in this figure)
For example, n pieces of sampling data may be averaged to obtain captured data indicated by a broken line, and points may be converted to points using this value.

In each of the above embodiments, the captured data of the detected CO concentration value is divided into points and pointed.
A coefficient may be given in advance according to the magnitude of the CO concentration, and the magnitude of the captured data may be multiplied by the coefficient to perform weighting, or the detection data of the CO sensor 11 may not be weighted (data processing). May be accumulated as it is. However, by using points as in the present embodiment, it is possible to prevent the accumulated operation value from becoming a huge number.

Further, in each of the above embodiments, the sampling timing of the CO sensor 11 is performed at a predetermined time interval, but the sampling may be performed continuously.

Further, in the above embodiment, the sampling period is ended when the low-level data of the CO concentration is continuously sampled a predetermined number of times. However, the sampling period is set to a time T ₀ from the time when the data is first sampled. And resets the accumulated value when T ₀ has elapsed, or resets when the power of the water heater is turned off, or resets when the combustion stop time exceeds a certain time. The sampling period (reset time) can be set arbitrarily.

Further, the circuit unit 12 can be provided in the control device 6 or in the remote control 7, and furthermore, is configured as a unit independent of the control device 6 and the remote control 7. May be installed at an arbitrary place, and may be signal-connected to the control device 6 or the remote controller 7.

Further, in each of the above embodiments, the combustion equipment has been described by taking a gas-fired water heater as an example. However, the present invention can be applied to water heaters other than the gas-fired water heater such as an oil-fired water heater. In addition, the present invention is applied as a combustion safety device for various combustion appliances using gas or oil fuel, such as a bath kettle and a heater other than a water heater.

[0026]

According to the present invention, a CO concentration accumulating section for accumulating a value corresponding to the detected concentration of CO gas detected by the CO sensor is provided, and the accumulated operation value of the CO concentration accumulating section is used as a set reference value. Since it is configured to output an alarm signal when it reaches, even if CO gas at a level lower than the dangerous concentration leaks into the room, the alarm signal is accumulated before it accumulates and causes danger to the human body. Can be output to perform the notification operation and the combustion stop operation, so that it is very safe to use the combustion equipment. In particular, CO detection
A configuration that accumulates the concentration by converting it to points according to its level
By doing so, it is possible to prevent the accumulated operation value from becoming a huge number.
This makes it possible to increase the calculation speed and
The operation configuration can be simplified, and
The required memory capacity can be reduced. Also,
The value corresponding to the detected CO concentration is accumulated regardless of the presence or absence of abnormal combustion.
Low CO concentration in exhaust gas
Even if this can be reflected in the cumulative operation value
Thus, further safety against CO can be achieved. Further
Then, the detected CO concentration continuously changes to a low level value given in advance.
To reset the accumulated value of CO
Configuration allows the previously accumulated operation values to be applied.
Reset at the right time to ensure safe operation against CO
Start anew and be confused by the operation value accumulated in the past
To perform CO safe operation accurately and with high reliability
This has the effect of being able to Further
In addition, the CO sensor is installed indoors.
Directly detect the concentration of CO gas leaking into the room.
Low-concentration CO gas
Is very safe in case of leaks, especially
Burned by taking in indoor air, like instant water heater
When using combustion equipment that emits exhaust gas indoors
Directly detects the concentration of CO emitted into the room
Since the safety operation is performed, it is very effective in safety measures.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a combustion safety device for a combustion apparatus according to the present invention.

FIG. 2 is an explanatory diagram showing a relationship between raw data of a detected CO concentration and sampling data.

FIG. 3 is a time chart showing the operation of the apparatus of the present embodiment.

FIG. 4 is an explanatory view showing another embodiment of the present invention.

FIG. 5 is a schematic structural view of a general water heater as a combustion device.

FIG. 6 is an explanatory view of the installation and use state of the water heater.

[Explanation of symbols]

 1 Water heater 11 CO sensor 12 Circuit unit 13 Notification means 15 Sampling designation section 16 Detected value processing section 17 CO concentration accumulation calculation section 20 Alarm output section

Claims (4)

(57) [Scope of request for utility model registration] 1. A CO sensor provided on an exhaust passage side of a combustion device for detecting a concentration of carbon monoxide gas in exhaust gas, and a value corresponding to a detected concentration of carbon monoxide gas detected by the CO sensor. the CO concentration data calculator for accumulating regardless of the presence or absence of abnormal combustion, the alarm output unit for outputting an alarm signal when the accumulated operation value during a predetermined sampling period has reached the set reference value by the CO concentration data calculator And a combustion safety device for a combustion device. 2. An exhaust system provided on an exhaust passage side of a combustion device.
CO sensor that detects the concentration of carbon monoxide gas in gas
And the carbon monoxide gas detected by this CO sensor
Detection value that converts the detected concentration of a point into a point according to its level
The processing unit and this detection value
CO concentration accumulation calculating section for accumulating the values, and the CO concentration accumulation
The calculation unit calculates the cumulative calculation value during the predetermined sampling period.
Alarm output that outputs an alarm signal when the set reference value is reached
Combustion safety device for combustion equipment having a part . 3. An exhaust system provided on an exhaust passage side of a combustion device.
CO sensor that detects the concentration of carbon monoxide gas in gas
And the carbon monoxide gas detected by this CO sensor
Concentration calculation unit for accumulating the value corresponding to the detected concentration of
And a predetermined sampling by the CO concentration accumulation calculating section.
When the cumulative operation value during the period reaches the set reference value, an alarm signal
Alarm output unit for outputting a signal, and detection of the carbon monoxide gas.
The concentration is continuously lower than the preset low level value for the set number of times.
Is calculated by the CO concentration accumulation calculating section when
Resetting the cumulative operation value of the CO concentration
Combustion safety device for combustion equipment. 4. The CO sensor is installed in a room of a building
The fuel of the combustion equipment according to claim 1 or claim 2 or claim 3.
Safety device for burning.