JPH09147266A - Gas alarm unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas alarm unit which can be used for both domestic and commercial purposes via the switching of alarm systems. SOLUTION: An alarm unit includes a sensor circuit part 1 which outputs an alarm command 1s after detecting that the density of the gas 10 to be detected exceeds a fixed level, an alarm tone storage part 2 which previously stores the alarm tones as signals and outputs an alarm tone signal 2s after reception of the command 1s , and an alarm output part 3 which converts the signal 2s into an alarm tone 3s and outputs it. In such a constitution, the part 2 previously stores plural types of alarm tone signals that can be selected and a changeover switch 4 is added to supply the command S1 to the part 2 as the selection signals 1SK and 1SG for those alarm tone signals.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas leak alarm device which detects the concentration of natural gas such as city gas and LP gas leaked from gas appliances and gas pipes and gives an alarm, and incomplete combustion of combustion appliances. The present invention relates to a gas alarm device including an incomplete combustion alarm device that detects the concentration of carbon monoxide (CO) generated by and issues an alarm.

[0002]

2. Description of the Related Art Gas alarms such as gas leak alarms and incomplete combustion alarms give a warning to the user by issuing an alarm when the concentration of a gas component to be detected in an atmosphere exceeds a certain value. As a method of warning, it is common to turn on an alarm display lamp with an LED or the like to visually notify the danger, and at the same time, to generate an alarm sound from a buzzer or a speaker to auditorily notify the danger. As an alarm sound using a speaker, an electronic sound, a voice synthesis sound using a microcomputer, or a combined sound of both is used.

On the other hand, gas alarms such as gas leak alarms and incomplete combustion alarms are installed in general households and in kitchens, etc. due to legal regulations, and are easily exposed to oil smoke and miscellaneous gas. The installation environment is divided into those for severe work. Further, in the home-use gas alarm device, a voice synthesis sound is used for the alarm sound, so that the user can easily understand the content of the alarm, for example, "Is gas leaking?" On the other hand, the commercial gas alarm system employs an alarm system using a buzzer sound or an electronic sound in order to avoid giving a false misunderstanding to the visitor and making the impression of the store worse.

Although there is no legally distinction between the incomplete combustion alarm device for domestic use and that for commercial use, the alarm sound is as follows:
As with the gas leak alarm, different alarm systems are used depending on the installation target.

[0005]

In the conventional gas alarms such as a gas leak alarm and an incomplete combustion alarm, a home gas alarm and a commercial gas alarm which are different in installation target are
Even if they have the same level of environmental resistance, their alarm sounds are different between home and business use.For example, a home gas alarm that emits a voice synthesis sound and a work that emits a buzzer or electronic sound. It was handled as a model separate from the gas alarm for use. Therefore, the number of types of gas leak alarms is increased, the number of models for incomplete combustion alarms is increased, and the number of combined gas leak / incomplete combustion type gas alarms is increased. In addition to not being able to fully exert the cost merit, there has been a problem that it causes economic disadvantages such as an increase in the inventory amount as a whole.

An object of the present invention is to provide a gas alarm device compatible with a domestic gas alarm device and a commercial gas alarm device by switching alarm systems.

[0007]

In order to solve the above-mentioned problems, the invention according to claim 1 detects that the concentration of a gas component to be detected, which is generated at a place to be installed, exceeds a certain level. And a warning circuit for issuing a warning command, a warning sound storing section for storing a warning sound as a signal in advance and receiving the warning command and outputting a warning signal, and outputting the warning signal by converting the warning signal into a warning signal. In a gas alarm device having an alarm output unit in at least one case, the alarm sound storage unit stores in advance a plurality of selectable alarm sound signals that are determined corresponding to the installation target, and the alarm command. Is provided to the alarm sound storage unit as a selection signal of the plurality of kinds of alarm sound signals.

Here, in the invention according to claim 2, in the gas alarm device according to claim 1, it is preferable that the changeover switch is provided at a position operable from the outside of the case. Further, the invention according to claim 3 is the gas alarm device according to claim 1 or claim 2, wherein the changeover switch is provided with a display portion for switching the display contents in conjunction with the changeover operation. good.

Further, in the invention according to claim 3, in the gas alarm device according to claim 1, it is preferable that the gas component to be detected is one or both of natural gas and its incomplete combustion gas. . In the invention according to claim 1,
Multiple types of alarm sound signals are stored in advance in the alarm sound storage unit, for example, a voice-synthesized sound signal required for a home gas alarm device and an electronic sound signal required for a commercial gas alarm device. By selecting and outputting one of the alarm sound signals of (1) by the changeover switch, it becomes possible to use one gas alarm for both home and business use.

According to the second aspect of the invention, the changeover switch is provided at a position where it can be operated from the outside of the case, so that the changeover operation is facilitated. Further, in the invention according to claim 3, since the changeover switch is provided with the display section for switching the display content in association with the switching operation, it is easy to visually determine which alarm sound method the display content is. Can be identified.

Further, in the invention according to claim 4, if the gas component to be detected is one of natural gas and its incompletely combusted gas, it can be used for both domestic and commercial use, and a gas leak alarm device A complete combustion alarm is formed, and if both natural gas and its incomplete combustion gas are used, a combined gas leak / incomplete combustion type gas alarm that can be used both for home and for business is formed.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments. FIG. 1 is a schematic configuration diagram of a gas alarm device showing an embodiment of the present invention. In the figure, the sensor circuit unit 1 is
For example, a gas leak sensor or a carbon monoxide sensor having a bridge circuit configuration, an amplifier circuit for the sensor, and a comparator circuit for issuing an alarm command 1 _S when the amplifier output exceeds a threshold value, and the alarm command 1 _S includes the changeover switch 4 Are switched to a plurality of selection signals 1 _SK, 1 _SG, and some selection signals are supplied to the alarm sound storage unit 2. The alarm sound storage unit 2 has a plurality of kinds of alarm sound signals, for example, "Pip, Pip, Pip, gas leaking" which is a voice-synthesized sound signal required for a home gas alarm device. Two types of electronic sound signals required by the alarm device, "pi, pi, pi, pi, pi" are stored in advance, and the selection signals 1 _SK, 1 _SG
The warning sound signal 2 _{S, which} is either the voice synthesis signal or the electronic sound signal selected by, is output to the warning output unit 3. The alarm output unit 3 is composed of a speaker and its drive circuit, and converts the alarm sound signal 2 _S into an alarm sound 3 _S and outputs it.

In this embodiment, when the gas leak alarm is installed at home, the changeover switch 4 is connected to, for example, the side which outputs the selection signal 1 _SK ,
It is possible to provide a gas leak alarm that alerts you to danger by using a voice-synthesized sound such as "Isn't gas leaking?" Also, when the installation target is for business use, by connecting the changeover switch 4 to, for example, the side that outputs the selection signal 1 _SG , a gas that informs the danger by an electronic sound "pip, pip, pip, pip," A leak alarm can be provided.

Further, in the case of the incomplete combustion alarm device, a voice synthesis signal "Pippo, Pippo, the air is dirty, please ventilate" is used for business use as a plurality of types of alarm sound signals for home use. By storing the electronic sound "Pippo, Pippo, Pippo, Pippo" in the alarm sound storage unit 2 in advance, an incomplete combustion alarm device that informs a danger by an alarm sound different from the gas leak alarm device can be obtained. To be

Therefore, the gas alarm device according to this embodiment is designed so that the environment-resistant performance of the gas alarm device is such that it can be installed in a kitchen or the like and can withstand a business environment where the installation environment is severe, such as being easily exposed to oil fumes and other gases. , Gas leak alarms and incomplete combustion alarms will be compatible with different installation targets, and two types of gas leak alarms or incomplete combustion alarms were conventionally required, depending on the installation target. However, in the embodiment, each model is reduced to one model.

FIG. 2 is a side view of a main part showing a different embodiment of the present invention, and shows an installation state of a case where a slide switch is used as the changeover switch 4 as an example. In the figure, a storage case 11 for a gas leak alarm or an incomplete combustion alarm is composed of a base 11A for supporting, for example, a printed circuit board on which the respective parts shown in FIG. 1 are mounted, and a box-shaped cover 11B for covering them. On the side wall of the cover 11B, the operation and display window 1 for the changeover switch 4 not shown
2 are formed. The slide switch as the changeover switch 4 is fixed to, for example, a support portion of the base 11B that covers the printed circuit board or the display window 12 from the inside, and the operation lever 14 is exposed to the outside from the operation / display window 12.
The slide switch switching operation can be performed outside the case 11. Further, the operation lever 14 is provided with a display plate 15 that moves along the inner wall surface of the cover 11B in conjunction with the switching operation, and the display surface of the display plate 15 has two display contents, "for business" and "for home use". Is the operating lever 1
4 are symmetrically shown, and when the operation lever 14 is moved to the right end of the operation / display window 12, "commercial use" is displayed and at the same time, the selection signal 1 _SG shown in FIG. 1 can be output. It becomes a state. In addition, the operation lever 14 is operated and the display window 1
When it is moved to the left end of 2, at the same time that "household" is displayed, it becomes ready to output the selection signal 1 _SK shown in FIG. Further, the display plate 15 also plays a role of preventing cockroaches and the like from entering the case through the gap between the operation / display window 12.

According to the embodiment, the changeover operation of the changeover switch 4 is facilitated, and whether the changeover switch 4 is in a state capable of giving an alarm sound for home use or an alarm sound for business use is easily understood from the displayed contents. The advantages that can be identified are obtained. FIG. 3 is a plan view of an essential part showing still another embodiment of the present invention, and the installation state is shown by taking a case where a rotary type changeover switch is used as the changeover switch 4 as an example. In the figure, a box-shaped cover 11B of the case
An operation hole 16 and a display window 17 of a rotary type changeover switch (not shown) are formed on one surface of the. In the rotary changeover switch, the end face of the changeover operation shaft 18 is the operation hole 1
It is supported by, for example, a printed circuit board so as to be located at the center of 6. Further, the switching operation shaft 18 is provided with a display plate 19 which rotates along the inner wall surface of the cover 11B in conjunction with the switching operation, and the surface of the display plate 19 has, for example, two "voice" and "electronic sound". The display content is described with the switching angle maintained.

In this embodiment, when the rotary type changeover switch is changed over by inserting a driver through the operation hole 16 and rotating the operation shaft 18, the display plate 19 is rotated in conjunction with the changeover of the rotary changeover switch. Since a certain "voice" or "electronic sound" is displayed, similar to the above-mentioned embodiment,
It is possible to easily identify from the displayed contents whether the changeover switch 4 is switched to the home alarm sound or the business alarm sound.

FIG. 4 is a schematic configuration diagram showing a gas leak / incomplete combustion combined type gas alarm according to another embodiment of the present invention. In the figure, the gas leak / incomplete combustion combined type gas alarm is equipped with a gas leak sensor circuit section 21 and an incomplete combustion gas sensor circuit section 31, and the respective alarm commands 21S and 31S are controlled by a double pole double throw changeover switch 24. The alarm sound storage unit 22 side and the commercial alarm sound storage unit 32 side are switched and connected. In addition, two alarm sound storage units 22
The output sides of and 32 are connected in parallel to the alarm output unit 3.

Here, on the home alarm sound storage unit 22 side,
As a plurality of warning sound signals, a voice synthesis sound signal that is selectable by a warning command 21 _S from the gas leak sensor circuit section 21 "Pip, pit, pit, gas leak?" And incomplete combustion gas sensor circuit section Warning command 3 from 31
The voice synthesis signal "Pippo, Pippo, the air is dirty, please ventilate" that can be selected by 1 _S is stored in advance. Furthermore, on the professional alarm sound storage unit 32 side,
A plurality of alarm sound signal can be selected by warning command 21S from gas leak sensor circuit section 21 as a "beep, beep, beep, beep," an electronic sound signal that, warning command 31 _S from incomplete combustion gas sensing circuit portion 31 The electronic sound signal "Pippo, Pippo, Pippo, Pippo" that can be selected is stored in advance.

Therefore, in the state where the changeover switch 24 is connected to the home alarm sound storage section 22 side, the occurrence of gas leakage and the occurrence of incomplete combustion can be notified by two different voice synthesis sounds, and the changeover switch 24 is operated. In the state of being connected to the alarm sound storage unit 32 side for gas, the occurrence of gas leakage and the occurrence of incomplete combustion can be notified by two different types of electronic sounds, and the combined gas leakage and incomplete combustion can be shared by two installation targets. A type gas alarm is obtained.

The arrangement of the changeover switch and the structure of the display section are the same as those described with reference to FIGS. Further, the gas leak sensor circuit unit 21 and the incomplete combustion gas sensor circuit unit 31 may be mounted on one substrate. In addition, two alarm sound storage units 22 and 3
2 may be configured to be stored together in a microcomputer mounted on the substrate. Furthermore, it does not prevent that the speaker portion of the alarm output unit 3 is provided at a remote place outside the case.

[0023]

As described above, the gas alarm device of the present invention has the following features.
Since the alarm sound can be selected by operating the changeover switch, there are different types of alarm sounds.
Gas leak alarm, incomplete combustion alarm, which required a model,
It is possible to use both gas leak and incomplete combustion combined type gas alarms for one model each, and high value-added gas by utilizing the manufacturing cost reduction effect and the inventory volume compression effect due to the small model and mass production. The leak alarm, the incomplete combustion alarm, and the gas leak / incomplete combustion combined gas alarm can be provided economically advantageously, and an advantage can be obtained that can contribute to the spread of these gas alarms.

Also, since the changeover switch can be easily operated outside the case and the changeover contents can be identified from the outside, there is an advantage that a gas alarm device that can easily and surely change over to a different installation target can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a gas alarm device showing an embodiment of the present invention.

FIG. 2 is a side view of a main part showing a different embodiment of the present invention.

FIG. 3 is a plan view of a main part showing still another embodiment of the present invention.

FIG. 4 is a schematic configuration diagram showing a gas leak / incomplete combustion combined type gas alarm according to another embodiment of the present invention.

[Explanation of symbols]

1 sensor circuit part 1 _S alarm command 2 alarm sound storage part 2 _S alarm sound signal 3 alarm output part 3 _S alarm sound 4 changeover switch 10 gas to be detected 11 case 11A base 11B cover 12 operation and display window 14 operation lever of changeover switch 15 display plate 16 operation hole 17 display window 18 operation axis 19 display plate 21 gas leak sensor circuit section 21 _S alarm command (gas leak) 22 alarm sound storage section (for home use) 24 changeover switch 31 incomplete combustion gas sensor circuit section 31 _S Warning command (incomplete combustion) 32 Warning sound memory (for business use)

 ─────────────────────────────────────────────────── --- Continuation of the front page (72) Inventor Minoru Hirose 33-145 Fujimidai, Kukizaki-cho, Inashiki-gun, Ibaraki Prefecture (72) Inventor Shinichi Ochi No. 1 Tanabe Shinden, Kawasaki-ku, Kawasaki-shi, Kanagawa Fuji Electric Co., Ltd. In the company

Claims (4)

[Claims] 1. A sensor circuit unit for detecting when the concentration of a gas component to be detected, which has occurred at a place to be installed, exceeds a certain level, and issuing an alarm command, and an alarm sound is stored in advance as a signal to provide the alarm command. In a gas alarm device having at least one case, an alarm sound storage unit for receiving an alarm sound signal and outputting an alarm sound signal, and an alarm output unit for converting the alarm sound signal into an alarm sound and outputting the alarm sound signal. A changeover switch which stores in advance a plurality of types of selectable alarm sound signals that are determined according to the installation target and supplies the alarm command to the alarm sound storage unit as a selection signal of the plurality of types of alarm sound signals. A gas alarm device characterized by being equipped with. 2. The gas alarm according to claim 1, wherein the changeover switch is provided at a position operable from the outside of the case. 3. The gas alarm device according to claim 1 or 2, wherein the changeover switch includes a display unit for switching display contents in conjunction with the changeover operation. 4. The gas alarm according to claim 1, wherein the gas component to be detected is one or both of natural gas and incompletely combusted gas thereof.