JPH0636164A - Maintenance alarm device of heat generating instrument - Google Patents

Abstract

PURPOSE:To prevent the occurrence of an abnormality in a heat generating instrument by notifying of a user that the maintenance of the exothermic instrument is necessary. CONSTITUTION:Each stipulated value of a total time counter 4 and a number of times counter 5 is preliminarily set based on each type of heat generating instruments. A thermistor 1 is installed on a place where it becomes to be a high temperature by the gas combustion within a gas equipment, for instance, the total time counter 4 counts combustion time by storing it, and the number of times counter 5 counts the number of times of combustion by storing it. When the count values of the counter 4 or 5 reach stipulated values, the message of 'necessity of maintenance' for notifying of that the maintenace of an exothermic instrument is necessary is made to display on a liquid crystal display unit 7 by a driving circuit 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a maintenance alarm device for a gas burning appliance, a petroleum burning appliance, a heating appliance such as an electric heating appliance.

[0002]

2. Description of the Related Art When detecting an abnormality in a gas combustion appliance such as a gas stove or a gas water heater, it is judged by the user's sensation that it is a gas odor or the color of the fire is reddish due to incomplete combustion. The way to do is taken.

[0003]

However, in the above-mentioned determination method, since the subjective judgment is made based on the sense of the user, there is a problem that a gas explosion accident or carbon monoxide poisoning occurs due to a delay in the detection of abnormality. . Further, in recent years, when the flame cannot be observed from the outside due to the complicated structure of the heat-generating device, the visual determination method is almost impossible.

In view of the above problems of the prior art, the present invention provides a new maintenance alarm device for a heat-generating device by notifying that the heat-generating device needs to be maintained, thereby preventing abnormalities in the heat-generating device. The purpose is to do.

[0005]

In order to achieve the above object, the present invention provides a temperature sensor for detecting a normal use state by detecting a heat generation state of a heat generating device, and a normal use state detected by the temperature sensor. First counting means for counting the cumulative time, the second counting means for counting the cumulative number of times of normal use detected by the temperature sensor, and the first or second counting means. And a means for notifying a message indicating that maintenance is required when the cumulative time or the cumulative number exceeds the respective set values.

The present invention further comprises weighting means for weighting the cumulative time and the number of times counted by the first and second counting means, respectively, and the notifying means is provided with the cumulative time weighted by the weighting means. A feature is that a message is notified when the added value of the cumulative number exceeds the set value. According to the present invention, further, the set value of the cumulative time and the cumulative number of times counted by the first and second counting means, or the coefficient weighted by the weighting means is the frequency at the time of normal use for each model of heat-generating equipment. It is characterized in that it can be set based on time.

[0007]

According to the present invention, with the above configuration, the temperature sensor detects the normal use state due to the heat generation of the heating device, and when the accumulated time or the number of times of the normal use state exceeds each set value, maintenance is required. A message indicating that there is is notified. Therefore, it is possible to prevent the occurrence of abnormality in the heat generating device by notifying that the heat generating device needs maintenance.

Further, when the cumulative time in the normal use state and the cumulative number of times are weighted and the added value exceeds the set value,
Since the message indicating that maintenance is required is notified, it is possible to prevent the occurrence of abnormality in the heating device by notifying that the heating device needs maintenance. In addition, the set value of the cumulative time and cumulative number of times of normal use, or the weighting coefficient can be set based on the frequency and time of normal use for each model of heating device, so that it can be used year-round, such as in a gas water heater. Can be set optimally for equipment that is used frequently but has a short burning time, or equipment that is used only in winter and has a low usage but has a long burning time, such as a gas heater. It is possible to realize a device having general versatility with respect to the heating device.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a maintenance alarm device for a gas appliance which is an embodiment of a maintenance alarm device for a heating device according to the present invention, and FIG. 2 is an external view showing the maintenance alarm device of FIG. As shown in FIG. 2, this maintenance alarm device includes a main body 10 and a lead wire 1 for the main body 10.
The probe unit 12 is connected to the thermistor 1. The probe unit 12 is connected through the probe unit 12. The main body 10 is attached to a place where the temperature does not rise due to combustion, such as the panel surface of a gas appliance, and the probe 1
2 is, for example, 80 ° C to 1 due to gas combustion in the gas equipment.
It is installed in a place with a high temperature of 20 ° C.

As shown in FIG. 1, a detection circuit 2 for detecting whether the detected temperature is a predetermined value or more based on the resistance value of the thermistor 1 and a clock having a predetermined frequency are provided in the main body 10. The total time for counting the total combustion time of the gas equipment by counting the clock of the crystal oscillator 3 when the detected temperature of the thermistor 1 is equal to or higher than a predetermined value based on the generated crystal oscillator 3 and the detection signal of the detection circuit 2. A counter 4 is provided.

Further, in the main body portion 10, a number counter 5 for counting the cumulative number of combustions of the gas equipment based on the detection signal of the detection circuit 2, and a liquid crystal based on count values of the total time counter 4 and the number counter 5 A drive circuit 6 for informing that the gas equipment needs maintenance by driving the display 7 and a battery 8 for power supply are provided. The drive circuit 6 also causes the liquid crystal display 7 to display a message indicating the normal operation of the device and the battery 8 and a message indicating that the device 8 is operating.

For example, the total time counter 4 has a maximum of 2
It is configured to be able to count the combustion time of 0,000 hours, and the number counter 5 is configured to be able to count the maximum number of combustions of 60,000 times. Each of the total time counter 4 and the number of times counter 5 is configured to be able to set a specified time and a specified number of times at the time of factory shipment, and the count value can be reset by the reset switch SW.

Here, as the gas equipment, for example, a gas water heater has a high usage frequency but a short burning time, while a gas heater has a low usage frequency but a long burning time. Therefore, the total time counter 4
The number of times and the number of times counter 5 are respectively set based on the model of the heat generating device which is the application. In addition, by configuring this specified value so that it can be set only at the time of factory shipment, it is possible to prevent setting mistakes at the user site. In addition, for example, in a device for a gas water heater, the specified value of the total time is set to 1000 hours, and the number of combustion times is set to 50.
It is set to 00 times. Also, in the device for the gas heater,
The specified value of the total time is set to 10000 hours, and that of the number of combustions is set to 1000 times.

When it is attached to the gas equipment at the user site, the total time counter 4 accumulates and counts the combustion time, and the number counter 5 accumulates and counts the number of combustions, and any count value is defined. If the value has not been reached, the drive circuit 6 displays a message "OK" indicating the normal operation of this device and the battery 8 on the display 7
In addition, the message "burning" is displayed during burning.

When the count value of the counter 4 or 5 reaches the specified value, the drive circuit 6 displays the message "Maintenance required" for notifying that the maintenance is required. Also, when the battery 8 is replaced and the reset switch SW is pressed during maintenance of the gas equipment, the total time counter 4
Then, each count value of the frequency counter 5 is cleared. Therefore, according to the above-described embodiment, when the total combustion time or the cumulative number of combustions of the gas appliance exceeds the specified value, the message "Maintenance required" is displayed, so that the occurrence of abnormality can be prevented. Further, in the above-described embodiment, some message is displayed during the life time of the battery 8. Therefore, when the life of the battery 8 has passed and no message is displayed,
It is possible to let the user know that maintenance is necessary by using an instruction manual or the like.

In the above embodiment, the specified values of the total time counter 4 and the number of times counter 5 are set for each application, but the digit of each specified value is set by the setter 21 as shown in FIG. However, when a certain digit of the count value of the counters 4 and 5 becomes "1", the comparator circuit 22 may detect and display the message "Maintenance required". In this case, it is possible to make detailed settings for each model of the heating device.

Further, as shown in FIG. 4, a specified value is fixedly set, and the count values of the total time counter 4 and the number counter 5 are weighted by variable coefficients α and 1-α in the weighting circuits 23 and 24, respectively. , This addition value is added to the addition circuit 2
5, the fixed specified value set by the specified value setter 21a is detected by the comparison circuit 22a, and the message "Maintenance required" is displayed.
May be displayed. Further, in the above embodiment, the display message is used to notify that maintenance is required, but it may be configured to notify using a buzzer, a voice message, or the like.

[0018]

As described above, according to the present invention,
The temperature sensor detects the normal use state due to the heat generation condition of the heating device, and when the cumulative time or the number of times of this normal use state exceeds the respective set values, a message indicating that maintenance is required is notified. Therefore, it is possible to notify that the heating device needs maintenance and prevent the heating device from abnormally occurring.

Further, when the cumulative time and the cumulative number of times of normal use are weighted and the added value exceeds the set value,
Since the message indicating that maintenance is required is notified, it is possible to prevent the occurrence of abnormality in the heating device by notifying that the heating device needs maintenance. In addition, the set value of the cumulative time and cumulative number of times of normal use, or the weighting coefficient can be set based on the frequency and time of normal use for each model of heating device, so that it can be used year-round, such as in a gas water heater. Can be set optimally for equipment that is used frequently but has a short burning time, or equipment that is used only in winter and has a low usage but has a long burning time, such as a gas heater. It is possible to realize a device having general versatility with respect to the heating device.

[Brief description of drawings]

FIG. 1 is a block diagram showing a maintenance alarm device for a gas appliance, which is an embodiment of a maintenance alarm device for a heating device according to the present invention.

FIG. 2 is an external view showing the maintenance alarm device of FIG.

FIG. 3 is a block diagram showing a main part of a maintenance alarm device according to a second embodiment.

FIG. 4 is a block diagram showing a main part of a maintenance alarm device according to a third embodiment.

[Explanation of symbols]

 1: Thermistor 2: Detection circuit 3: Crystal oscillator 4: Total time counter 5: Number counter 6: Drive circuit 7: Liquid crystal display 10: Main body 11: Lead wire 12: Probe 21, 21a: Specified value setter 22 , 22a: comparison circuit 23, 24: weighting circuit 25: addition circuit SW: reset switch

Claims (3)

[Claims] 1. A temperature sensor for detecting a normal use state by detecting a heat generation state of a heat generating device, a first counting means for counting an accumulated time of the normal use state detected by the temperature sensor, and the temperature. Second counting means for counting the cumulative number of times of normal use detected by the sensor, and when the cumulative time or cumulative number respectively counted by the first or second counting means exceeds the respective set values. , A maintenance alarm device for a heating device, which has means for informing a message indicating that maintenance is required. 2. A weighting means for weighting the cumulative time and the number of times counted by the first and second counting means, respectively, and the notifying means, the cumulative time and the number of times of weighting weighted by the weighting means. 2. The maintenance alarm device for a heating device according to claim 1, wherein a message is notified when the added value of the above exceeds the set value. 3. The set values of the cumulative time and the cumulative number of times counted by the first and second counting means, respectively, or the coefficient weighted by the weighting means is the frequency at the time of normal use for each model of heat-generating equipment. The maintenance alarm device for a heating device according to claim 1 or 2, wherein the alarm device can be set based on time.