JP6480166B2 - Alarm - Google Patents

Description

  The present invention relates to an alarm device, and more particularly to an alarm device including a gas detection unit capable of detecting a plurality of gases.

  Conventionally, an alarm device including a gas detection unit capable of detecting a plurality of gases is known (for example, see Patent Document 1).

  Patent Document 1 discloses a portable gas alarm device including four gas sensors, a display unit on which detection results of the four gas sensors are displayed, and a gas detection notification mechanism. In this portable gas alarm device, the gas detection notification mechanism includes a buzzer, an alarm light emitting element, and an alarm vibration generator. In addition, in the portable gas alarm device, when some of the four types of gas exceed the reference value, the gas detection notification mechanism is driven to alert the user by buzzer sound, light emission and vibration. It is comprised so that it may alert | report.

JP 2009-281982 A

  However, the portable gas alarm device described in Patent Document 1 is configured to notify an alarm by a buzzer sound, light emission, and vibration when a part of a plurality of gases exceeds a reference value. However, it is considered that the buzzer sound, light emission and vibration do not include information on which gas exceeds the reference value. For this reason, there is a problem that the user cannot clearly recognize which gas exceeds the reference value.

  The present invention has been made to solve the above-described problems, and one object of the present invention is to allow the user to clearly recognize which gas concentration has exceeded a predetermined range. Is to provide a simple alarm.

An alarm device according to a first aspect of the present invention includes a gas detector that can detect a plurality of gases, and a display that can be displayed in a first display state that simultaneously displays detection results of the plurality of gases. When the concentration of a predetermined gas, which is a part of a plurality of gases, exceeds a predetermined range, at least a part of the detection results of gases other than the predetermined gas is displayed on the display unit. The display unit is configured to switch to a second display state in which the detection result of the predetermined gas is enlarged and displayed on the display unit, and the display unit includes a plurality of segments, and the detection result of each of the plurality of gases is displayed. Each of the display areas includes a plurality of display areas. In the second display state, a plurality of segments of display areas adjacent to each other are combined to display a predetermined gas detection result enlarged on the display unit. and are

In the alarm device according to the first aspect of the present invention, as described above, when the concentration of the predetermined gas exceeds the predetermined range, the detection result of at least a part of the gas other than the predetermined gas is displayed on the display unit. It is configured to switch to the second display state in which the detection result of the predetermined gas is displayed in an enlarged manner on the display unit without being displayed. As a result, when the concentration of the predetermined gas exceeds the predetermined range, the detection result of the predetermined gas is enlarged and displayed on the display unit, so it is clear to the user which gas concentration exceeds the predetermined range. Can be recognized. In addition, even when the display unit is composed of a plurality of segments whose display size is not easily switched compared to a general display unit in which a plurality of fine pixels are arranged in a matrix, By combining the segments and displaying the predetermined gas detection result on the display unit in an enlarged manner, the user can clearly recognize which gas concentration has exceeded the predetermined range. Also, by configuring the display unit from a plurality of segments, the control for displaying the gas detection result on the display unit is simplified compared to a general display unit in which a plurality of fine pixels are arranged in a matrix. Can be

An alarm device according to a second aspect of the present invention includes: a gas detector that can detect a plurality of gases; and a display that can be displayed in a first display state that simultaneously displays detection results of the plurality of gases. When the concentration of a predetermined gas, which is a part of a plurality of gases, exceeds a predetermined range, at least a part of the detection results of gases other than the predetermined gas is displayed on the display unit. not the detection result of the predetermined gas is configured to switch the second display state is enlarged and displayed on the display unit, the display unit, in the second display state, the detection result of Jo Tokoro gas on the display unit A display area of the predetermined gas in the display area of the detection results of each of the plurality of gases in the first display state is displayed with an enlarged display and a character indicating that the concentration of the predetermined gas exceeds a predetermined range in regions adjacent to, it is configured to display To have.
In the alarm device according to the second aspect of the present invention, as described above, when the concentration of the predetermined gas exceeds the predetermined range, the detection result of at least a part of the gas other than the predetermined gas is displayed on the display unit. It is configured to switch to the second display state in which the detection result of the predetermined gas is displayed in an enlarged manner on the display unit without being displayed. As a result, when the concentration of the predetermined gas exceeds the predetermined range, the detection result of the predetermined gas is enlarged and displayed on the display unit, so it is clear to the user which gas concentration exceeds the predetermined range. Can be recognized.

The alarm device according to the first or second aspect is preferably configured to alternately switch between the first display state and the second display state when the concentration of the predetermined gas exceeds a predetermined range. ing. With this configuration, the user can clearly recognize that the concentration of the predetermined gas exceeds the predetermined range by switching to the second display state in which only the predetermined gas is enlarged and displayed. In addition, by switching to the first display state in which the detection results of the respective gases are displayed at the same time, the detection results of gases other than the predetermined gas can be presented to the user. Thereby, a user's convenience can be improved.

In the alarm device according to the first or second aspect, preferably, in the case of gas calibration, the detection result of the gas to be calibrated is switched to a third display state in which the detection unit is enlarged and displayed, or the alarm device main body When an abnormality occurs, at least one of switching to the fourth display state in which the abnormality information is enlarged and displayed on the display unit is performed. With this configuration, in the case of gas calibration, the detection result of the calibration target gas can be clearly recognized by the user, so that gas calibration can be easily performed. In addition, when an abnormality occurs in the alarm main body, the user can clearly recognize the occurrence of the abnormality and the content of the abnormality.

The alarm device according to the first or second aspect preferably further includes a main body of the alarm device in which the gas detection unit and the display unit are arranged and formed in a portable size. If configured in this way, even if the size of the display unit is limited due to the size of the alarm device body being portable, the concentration of the predetermined gas exceeds the predetermined range In addition, since the detection result of the predetermined gas is enlarged and displayed on the display unit, the user can clearly recognize that the concentration of the predetermined gas exceeds the predetermined range even in the display unit whose size is limited. be able to.

  According to the present invention, as described above, the user can clearly recognize which gas concentration has exceeded a predetermined range.

It is the perspective view which showed the alarm device by 1st Embodiment of this invention. It is the block diagram which showed the structure of the alarm device by 1st Embodiment of this invention. It is the figure which showed the state which all the segments in the display part of the alarm device by 1st Embodiment of this invention lighted. It is the figure which showed the 1st display state at the time of the non-alarm in the display part of the alarm device by 1st Embodiment of this invention. It is the figure which showed switching of the display state at the time of the alarm in the display part of the alarm device by 1st Embodiment of this invention. It is the figure which showed switching of the display state at the time of the alarm in the display part of the alarm device by the 1st modification of 1st Embodiment of this invention. It is the figure which showed switching of the display state at the time of the alarm in the display part of the alarm device by the 1st modification of 1st Embodiment of this invention. It is the figure which showed switching of the display state at the time of the alarm in the display part of the alarm device by the 2nd modification of 1st Embodiment of this invention. It is the figure which showed the 3rd display state displayed on a display part in the case of the gas calibration of the alarm device by 2nd Embodiment of this invention. It is the figure which showed the 4th display state displayed on a display part, when abnormality of the alarm device by 2nd Embodiment of this invention generate | occur | produces.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the drawings.

(First embodiment)
First, with reference to FIGS. 1-5, the whole structure of the alarm device 100 by 1st Embodiment of this invention is demonstrated.

The alarm device 100 according to the first embodiment of the present invention includes four types of gases (combustible gas (COMB), oxygen (O ₂ ), hydrogen sulfide (H ₂ S), and carbon monoxide (CO). ) Can be detected. This alarm device 100 is portable and is driven by a battery (not shown).

  As shown in FIG. 1, the alarm device 100 includes a portable alarm device body 1, a sensor unit 2 provided on the lower side (Z2 side) of the alarm device body 1, and the front surface of the alarm device body 1. The display part 3, the LED part 4, the alarm lamp part 5, and the operation part 6 provided in the side (X1 side) are provided. Further, as shown in FIG. 2, a buzzer unit 7, a control unit 8, and a storage unit 9 are arranged inside the alarm device main body 1. The sensor unit 2 is an example of the “gas detection unit” in the present invention.

The alarm device main body 1 has a rectangular parallelepiped external shape as shown in FIG. The sensor unit 2 includes a contact combustion type combustible gas sensor 21 that detects combustible gas, a constant potential electrolytic CO sensor 22 that detects carbon monoxide, and a constant potential electrolytic type H sensor that detects hydrogen sulfide. and ₂ S sensor 23, and an _{O 2} sensor 24 galvanic cell type for detecting oxygen. As a result, the sensor unit 2 is configured to be able to detect a plurality (four types) of gases. The four sensors 21 to 24 are respectively disposed inside four gas detection ports 2a provided on the lower side (Z2 side) of the alarm device body 1 so as to be arranged in the Y direction.

  Here, among the four kinds of gases, the combustible gas, hydrogen sulfide, and carbon monoxide have a greater risk as the concentration increases, while oxygen has a concentration lower than a predetermined concentration. Therefore, the danger increases.

  The display unit 3 has a rectangular shape that is long in the horizontal direction (Y direction) when viewed from the X1 side. The display unit 3 is provided with a backlight 3a (see FIG. 2) for enabling the display on the display unit 3 to be confirmed even in a dark place. The specific display contents of the display unit 3 will be described later.

The LED unit 4 is provided below the display unit 3 (Z2 side). In this LED unit 4, LEDs 41 to 44 having four different colors are arranged in the Y direction. Specifically, in the LED unit 4, from the Y1 side toward the Y2 side, the flammable gas LED 41 corresponding to the flammable gas, the CO LED 42 corresponding to the carbon monoxide, and the H ₂ S corresponding to hydrogen sulfide. The LED 43 and the O ₂ LED 44 corresponding to oxygen are arranged in this order. In addition, LED of the color corresponding to combustible gas, oxygen, hydrogen sulfide, and carbon monoxide is used for these four LEDs 41-44, respectively. Further, the LED unit 4 has a function of making the user easily recognize the alarm target gas and the calibration target gas by lighting or blinking the LED corresponding to the alarm target gas and the calibration target gas described later at the time of alarm or calibration. Have.

  The alarm lamp portions 5 are provided at both end portions in the Y direction. The alarm lamp unit 5 includes a red LED (not shown), and has a function of notifying the user of an alarm by turning on or blinking the red LED at the time of alarm.

  The operation unit 6 is provided between the display unit 3 and the LED unit 4. The operation unit 6 includes a pair of button units 61. The user can give various instructions to the alarm device 100 by operating the button unit 61.

  As shown in FIG. 2, the buzzer unit 7 has a function of notifying a user of an alarm by generating a buzzer sound as an alarm at the time of alarm. The control unit 8 includes a CPU (not shown) and the like, and is configured to control the entire alarm device 100 including control related to an enlarged display (second display state) described later. The storage unit 9 includes a ROM and a RAM (not shown), and stores various data and programs used in the control of the control unit 8.

  Next, with reference to FIG. 3, the detail of the display content of the display part 3 is demonstrated.

  As shown in FIG. 3, the display unit 3 is composed of a plurality of segments 3b arranged at predetermined positions. The segment 3b has various shapes such as a line shape, a dot shape, a character shape, and an icon shape. Further, the segment 3b has a liquid crystal (not shown) and is configured such that a corresponding shape (corresponding to a black portion in FIGS. 3 to 10) is displayed on the display unit 3 by switching the liquid crystal. Has been. In addition, since the display part 3 is comprised from the some segment 3b, since a drive voltage can be made low compared with the general display part by which several fine pixels are arrange | positioned at matrix form, for example easily It can be explosion-proof.

The display unit 3 includes four display areas 31 to 34 in which detection results of four types of gas are respectively displayed, and an icon display area 35 in which icons corresponding to information such as a battery (power supply) state are displayed. And an information display area 36 on which other information is displayed. Specifically, as the four display areas 31 to 34, a flammable gas display area 31 in which a flammable gas detection result is displayed, an O ₂ display area 32 in which an oxygen detection result is displayed, and a hydrogen sulfide detection result There H _{2 S} display area 33 is displayed and,, CO display region 34 a detection result of carbon monoxide is displayed is provided in the display unit 3. The combustible gas display area 31, the O ₂ display area 32, the H ₂ S display area 33, and the CO display area 34 are examples of the “display area” in the present invention.

  The combustible gas display region 31 is provided on the Y1 side of the display unit 3 and on the Z1 side. The combustible gas display area 31 includes a result display area 31a on the Z2 side and a character display area 31b on the Z1 side. The result display area 31a is configured such that seven segments 3b are combined to display four seven segments having the shape of the Arabic numeral “8” and a pair of dots arranged between the seven segments. Yes. The four 7 segments are arranged side by side in the Y direction.

  Further, by controlling the liquid crystal of the seven segments 3b, the four seven segments of the result display area 31a are configured to display Arabic numerals and alphabets from 0 to 9, respectively. Thereby, in the result display area 31a, it is possible to display numbers from the third decimal point (for example, 0.000) to the fourth digit (for example, 9999) by using the four segments and the dots. Yes, as a result, the result display area 31a is configured to display a numerical value (0 to 100 (% LEL)) of the detection result (concentration) of the combustible gas.

  The character display area 31b displays “COMB” meaning flammable gas and the detected concentration (% LEL) of the flammable gas exceeds the first alarm threshold set for the flammable gas (in the first stage). "AL1" that is turned on in the case of an alarm), "AL2" that is turned on when the second alarm threshold value that is larger than the first alarm threshold value is exceeded (in the case of a second-stage alarm), and flammable gas The unit “% LEL” can be displayed. Note that the second-stage alarm is set to be more easily recognized by the user than the first-stage alarm, such as changing the buzzer period or volume, for example, shortening the buzzer period or increasing the volume. Yes.

The O ₂ display area 32 is provided on the Y1 side of the display unit 3 and on the Z2 side. The O ₂ display area 32 includes a result display area 32a on the Z1 side and a character display area 32b on the Z2 side. The result display area 32a has substantially the same configuration as the result display area 31a. As a result, the result display area 32a has a numerical value (00.0 to 50.0 (vol%) of the oxygen detection result (concentration). )) Can be displayed. The character display area 32b is turned on when “O2” meaning oxygen and the detected oxygen concentration (vol%) are below the first alarm threshold set for oxygen (in the case of the first-stage alarm). “AL1”, “AL2” which is turned on when the second alarm threshold value is smaller than the first alarm threshold value (in the case of the second stage alarm), and the unit “vol%” of oxygen are displayed. It is configured to be possible.

The H ₂ S display area 33 is provided on the Y2 side of the display unit 3 and on the Z1 side. The H ₂ S display area 33 includes a result display area 33a on the Z2 side and a character display area 33b on the Z1 side. The result display area 33a has substantially the same configuration as the result display area 31a. As a result, the result display area 33a is a numerical value (00.0 to 150.0 (ppm) of the detection result (concentration) of hydrogen sulfide. )) Can be displayed. The character display area 33b is “H2S” meaning hydrogen sulfide and when the detected hydrogen sulfide concentration (ppm) exceeds the first alarm threshold set for hydrogen sulfide (in the case of the first stage alarm). “AL1” that is turned on, “AL2” that is turned on when the second alarm threshold value that is larger than the first alarm threshold value is exceeded (in the case of the second-stage alarm), and the unit of hydrogen sulfide “ppm” Is configured to be displayable.

  The CO display area 34 is provided on the Y2 side of the display unit 3 and on the Z2 side. The CO display area 34 includes a result display area 34a on the Z1 side and a character display area 34b on the Z2 side. The result display area 34a has substantially the same configuration as the result display area 31a. As a result, the result display area 34a displays the numerical value (0000 to 2000 (ppm)) of the detection result (concentration) of carbon monoxide. It is configured to be displayable. The character display area 34b displays “CO” meaning carbon monoxide and a case where the detected carbon monoxide concentration (ppm) exceeds the first alarm threshold set for the carbon monoxide concentration (first-stage alarm). "AL1" that is turned on in the case of (2), and "AL2" that is turned on when the second warning threshold value that is larger than the first warning threshold value is exceeded (in the case of a second-stage warning), and carbon monoxide The unit “ppm” can be displayed. In addition, in the character display area 34b, in addition to the unit of carbon monoxide (unit of hydrogen sulfide, ppm), a unit of combustible gas (% LEL) and a unit of oxygen (vol%) can be displayed. .

  As a result, as shown in FIG. 4, at the time of a non-alarm when none of the four types of gas corresponds to the case of the first stage alarm and the second stage alarm, the detection results of each of the four types of gas are At the same time, the display unit 3 is configured to be displayed in the first display state. In the first display state, the corresponding gas detection results are displayed as numerical values in each of the four result display areas 31a to 34a. In addition, the type and unit of gas corresponding to the character display areas 31b to 34b are displayed, while "AL1" indicating that the first stage alarm and the second stage alarm are present in any of the character display areas. "And" AL2 "are not displayed.

Further, as shown in FIG. 3, the result display areas 31 a to 34 a are all provided on the center side of the display unit 3. Thereby, the result display area 31a of the combustible gas display area 31 is adjacent to the result display area 32a of the O ₂ display area 32 on the Z2 side, and adjacent to the result display area 33a of the H ₂ S display area 33 on the Y2 side. doing. The result display area 32a of the O ₂ display area 32 is adjacent to the result display area 34a of the CO display area 34 on the Y2 side. The result display area 33a of the H ₂ S display area 33 is adjacent to the result display area 34a of the CO display area 34 on the Z2 side.

  The icon display area 35 is provided in the vicinity of the Y1 side end of the display unit 3. Further, in the icon display area 35, a mode in which only the battery icon indicating the remaining battery level and the maximum detection result value among the gas detection results are displayed in order from the Z1 side to the Z2 side is selected by the user. A PEAK icon that is displayed when the user selects a mode that reduces power consumption, an mute icon that is displayed when a user selects a mode that does not generate a buzzer sound, and A communication icon indicating that a wireless communication state using a wireless unit (not shown) is displayed can be displayed.

  The information display area 36 is provided in the vicinity of the side end portion on the Z2 side of the display unit 3. Further, the information display area 36 is configured to be able to display eight 16 segments obtained by combining the 16 segments 3b and point portions arranged between the 16 segments. The eight 16 segments are arranged side by side in the Y direction. As a result, by controlling the presence or absence of lighting of the 16 segments 3b, the eight 16 segments of the information display area 36 can each display Arabic numerals and alphabets from 0 to 9 more precisely than the seven segments. It is configured as follows. As shown in FIG. 4, the information display area 36 is configured to be able to display the date and temperature, the type of alarm gas (see FIG. 5) displayed in an enlarged manner, which will be described later, and the like.

  In addition, a round display unit 37 is provided on the Y2 side of the information display area 36. When the round shape display unit 37 adds a retrofitting function to the alarm device 100, the user can confirm whether or not the added function is operating depending on whether or not the round shape display unit 37 is lit. It is configured.

  Here, in the first embodiment, the alarm device 100 controls the control unit 8 to control a predetermined range (normal range) corresponding to the concentration of one or more of the four types of gases (alarm target gas). When the value exceeds (when alarming), the detection result (concentration) of the gas other than the alarm target gas is not displayed on the display unit 3 and the detection result (concentration) of the alarm target gas is enlarged and displayed on the display unit 2 The display state is switched from the first display state. Specifically, in a predetermined gas excluding oxygen among the four types of gases, the predetermined range (normal range) is set to a range from 0 to the first alarm threshold value. In oxygen, the predetermined range (normal range) is set to a range from the first alarm threshold value to a predetermined upper limit value (for example, 25.0 (vol%)). The alarm device 100 is configured to switch to the second display state in the predetermined gas excluding oxygen when the concentration of the predetermined gas exceeds the corresponding first alarm threshold value. Is configured to switch to the second display state when the oxygen concentration falls below the corresponding first alarm threshold.

  At this time, in the second display state in which the detection result of only the alarm target gas is displayed in an enlarged manner, the detection result of one type of alarm target gas is obtained by combining the seven segments and the point portions of the result display areas 31a to 34a. It is configured to be enlarged. In addition, the alarm device 100 is configured to switch between a first display state in which detection results of each of the four types of gas are simultaneously displayed and a second display state every predetermined time (for example, about 1 second). Has been.

  As an example of the first embodiment, two types of gases (oxygen and carbon monoxide) are within a predetermined range, while two types of gases (combustible gas and hydrogen sulfide) exceed a predetermined range (second The case where the target gas is an alarm target gas will be described. In this case, the display on the display unit 3 is switched as shown in FIG. Specifically, in the display unit 3, the second display state in which the detection result of only the combustible gas that is the alarm target gas is displayed in an enlarged manner, and the detection result of only hydrogen sulfide that is the alarm target gas is displayed in an enlarged manner. The second display state and the first display state in which the detection results of each of the four types of gas are simultaneously displayed are switched in a loop shape every predetermined time. That is, in this case, the first display state and the two second display states are alternately switched.

  In the second display state in which the detection result of only the combustible gas shown in the upper part of FIG. 5 is displayed in an enlarged manner, the detection of the combustible gas is performed by combining the seven segments and the dot portions of the result display areas 31a to 34a. The numerical value (100) of the result (density) is enlarged and displayed. Similarly, in the second display state in which the detection result of only hydrogen sulfide shown in the center of FIG. 5 is displayed in an enlarged manner, the seven segments and the dot portions of the result display areas 31a to 34a are combined to generate hydrogen sulfide. The numerical value (94.0) of the detection result (density) is enlarged and displayed. Here, in the second display state, in the first display state (in the case of four types of gas display), the detection target gas is detected in a size nearly twice as large as the detection results respectively displayed in the result display areas 31a to 34a. The result is configured to be enlarged.

  In the second display state shown in the upper side and the center of FIG. 5, the 16 segments of the information display area 36 are combined so that the name or abbreviation (COMB or H2S) is displayed. In the information display area 36, other information may be displayed. For example, when whether or not to perform an alarm is based on TWA (Time Weighted Average) or STEL (Short Term Exposure Limit), in addition to the name or abbreviation of the gas to be alarmed in the information display area 36, “TWA” “STEL” may also be displayed.

In the second display state, “AL2” is lit in the character display area 33b of the H ₂ S display area 33 on the Y2 side of the display unit 3 and on the Z1 side. Thereby, it is possible to notify the user that the concentration of the alarm target gas displayed in an enlarged manner is equal to or higher than the second alarm threshold value. In the second display state, the unit of the alarm target gas that is enlarged is displayed on the Y2 side of the display unit 3 and in the character display area 34b of the CO display area 34 on the Z2 side.

  In the first display state in which the detection results of the four types of gases shown in the lower part of FIG. 5 are displayed simultaneously, the character display areas 31b and 33b corresponding to the alarm target gas (combustible gas and hydrogen sulfide). Is displayed in the same manner as in the first display state at the time of non-alarm shown in FIG.

  Here, when only one kind of gas is the alarm target gas, the display unit 3 switches between the first display state and the one second display state alternately. When the three types of gases are alarm target gases, the display unit 3 alternately switches between the first display state and the three second display states. Further, when all of the four types of gases are alarm target gases, the display unit 3 alternately switches between the first display state and the four second display states.

  Moreover, it is comprised so that the backlight 3a of the display part 3 may be lighted at the time of an alarm. This makes it possible for the user to reliably recognize the presence of the alarm target gas. At this time, similarly to the LED unit 4, by setting the color of the backlight 3a to a color corresponding to the alarm target gas, the user can recognize not only the presence of the alarm target gas but also the gas type of the alarm target gas. Is possible.

  Further, when the concentration of the alarm target gas falls within a predetermined range (normal range) and is no longer the alarm target gas, the alarm device 100 controls the control unit 8 to control the first alarm non-alarm shown in FIG. After entering the display state 1, it is configured to be in a second display state in which only the detection result of the gas that is no longer the alarm target gas is displayed once (see FIG. 5). Thereby, it is possible to make the user easily recognize the gas that is no longer the alarm target gas.

  In the first embodiment, the following effects can be obtained.

  In the first embodiment, as described above, when the concentration of one or more of the four gases (the alarm target gas) exceeds a corresponding predetermined range, the detection result of the gas other than the alarm target gas Is configured to be switched to the second display state in which the detection result of the alarm target gas is displayed on the display unit 3 without being displayed on the display unit 3. As a result, when the concentration of the predetermined gas (alarm target gas) exceeds the predetermined range, only the detection result of the alarm target gas is enlarged and displayed on the display unit 3, so that the concentration of any gas exceeds the predetermined range. Can be clearly recognized by the user.

  Further, in the first embodiment, in the second display state in which the detection result of only the alarm target gas is displayed in an enlarged manner, the alarm target gas is detected by combining the seven segments and the dot portions of the result display areas 31a to 34a. The result is configured to be enlarged. Thereby, even when the display unit 3 is configured from a plurality of segments 3b in which switching of the display size is not easy compared to a general display unit in which a plurality of fine pixels are arranged in a matrix. By combining the plurality of segments 3b and displaying the detection result of the alarm target gas on the display unit 3 in an enlarged manner, the user can clearly recognize which gas concentration has exceeded a predetermined range. Further, by configuring the display unit 3 from the plurality of segments 3b, it is possible to display a gas detection result on the display unit 3 as compared with a general display unit in which a plurality of fine pixels are arranged in a matrix. Control can be simplified.

  In the first embodiment, the first display state and the second display state are alternately switched at the time of alarm when the concentration of the predetermined gas exceeds a predetermined range. Accordingly, by switching to the second display state in which only the alarm target gas is displayed in an enlarged manner, the user can clearly recognize that the concentration of the predetermined gas exceeds the predetermined range, By switching to the first display state in which the gas detection results are simultaneously displayed, the detection results of gases other than the alarm target gas can be presented to the user. Thereby, a user's convenience can be improved.

  Moreover, in 1st Embodiment, the alarm device main body 1 is carried by the alarm device 100 being provided with the gas detector 2 and the display unit 3 and having the alarm device body 1 formed in a portable size. Even if the size of the display unit 3 is limited due to the possible size, the detection result of the alarm target gas is displayed when the concentration of the alarm target gas exceeds a predetermined range. Therefore, even if the display unit 3 is limited in size, the user can clearly recognize that the concentration of the alarm target gas has exceeded a predetermined range.

(First modification of the first embodiment)
Next, a first modification of the first embodiment of the present invention will be described with reference to FIGS. In the first modification of the first embodiment, unlike the first embodiment in which only the detection result of one type of alarm target gas is displayed in an enlarged manner in the second display state, two types are displayed in the second display state. A case will be described in which the detection results of the alarm target gas are simultaneously enlarged and displayed. In addition, about the structure same as the said 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the first modification of the first embodiment of the present invention, when there are two or more types of alarm target gas, the first display state that simultaneously displays the detection results of each of the four types of gas, and the alarm target gas The detection result of the other gases is not displayed on the display unit 203, and the detection result (concentration) of the two types of alarm target gases is simultaneously enlarged and displayed on the display unit 203 for a predetermined time (for example, , About 1 second).

  At this time, in the second display state in which the detection results of the two types of alarm target gas are enlarged and displayed at the same time, the seven segments and the dot portions of the pair of adjacent result display areas among the four result display areas 31a to 34a are respectively shown. By combining, the detection results of the two types of alarm target gas are displayed in an enlarged manner. Specifically, as shown in the upper side of FIG. 6, the detection result of one of the alarm target gases is expanded in the Z direction by combining the seven segments and the dot portions of the result display areas 31a and 32a adjacent in the Z direction. The detection result of the other alarm target gas is enlarged and displayed in the Z direction by combining the seven segments and the dot portions of the result display areas 33a and 34a adjacent to each other in the Z direction. . Also, as shown in the upper side of FIG. 7, the detection result of one alarm target gas is enlarged and displayed in the Y direction by combining the seven segments and the dot portions of the result display areas 31a and 33a adjacent in the Y direction. At the same time, the seven segments and the dot portions of the result display areas 32a and 34a adjacent in the Y direction are combined, so that the detection result of the other alarm target gas is enlarged and displayed in the Y direction.

  Here, in the second display state, the detection result of the alarm target gas is enlarged and displayed in the Z direction as shown in FIG. 6, or the detection result of the alarm target gas is enlarged and displayed in the Y direction as shown in FIG. Whether or not to be performed is determined by the display position of each gas in the first display state in which the detection results of each of the four gases are displayed simultaneously. Specifically, when both gases adjacent in the Y direction are alarm target gases (combustible gas and hydrogen sulfide, or oxygen and carbon monoxide), the detection result of the alarm target gas in the second display state Is enlarged and displayed in the Z direction. On the other hand, when both gases adjacent in the Z direction are alarm target gases (combustible gas and oxygen, or hydrogen sulfide and carbon monoxide), the detection result of the alarm target gas in the second display state is the Y direction. Is displayed enlarged. When the two types of alarm target gas are not adjacent to each other in the Z direction and the Y direction (flammable gas and carbon monoxide hydrogen sulfide, or oxygen and hydrogen sulfide), the alarm target gas is detected in the second display state. The result is enlarged and displayed in either the Z direction or the Y direction.

  As an example of the first modification of the first embodiment, two types of gases (oxygen and carbon monoxide) are within a predetermined range, while two types of gases (flammable gas and hydrogen sulfide) are within a predetermined range. A case where the alarm target gas is exceeded will be described. In this case, when the two types of alarm target gases are adjacent to each other in the Y direction, the display on the display unit 203 is switched as shown in FIG. Specifically, in the display unit 203, the detection result (concentration) of the combustible gas and hydrogen sulfide, which are alarm target gases, is enlarged in the Z direction at the same time, and each of the four types of gases is displayed. The first display state in which the detection result (concentration) is displayed at the same time is alternately switched every predetermined time.

  In the second display state in which the detection result of the combustible gas and hydrogen sulfide shown in the upper part of FIG. 6 is enlarged and displayed at the same time, the numerical value (100) of the detection result (concentration) of the combustible gas is displayed on the display unit 203. While being enlarged and displayed in the Z direction on the Y1 side, a numerical value (94.0) of the detection result (concentration) of hydrogen sulfide is enlarged and displayed in the Z direction on the Y2 side of the display unit 203. In the second display state, characters other than “AL1” are lit in the character display areas 31b and 33b corresponding to the combustible gas and hydrogen sulfide, which are alarm target gases. Thereby, it is possible to make the user recognize that the pair of numerical values enlarged and displayed in the Z direction are the numerical value of the detection result of combustible gas and the numerical value of the detection result of hydrogen sulfide, respectively.

  As another example of the first modification of the first embodiment, two types of gases (hydrogen sulfide and carbon monoxide) are within a predetermined range, while two types of gases (combustible gas and oxygen) are within a predetermined range. The case where the gas is the alarm target gas exceeding the above will be described. In this case, when the two types of alarm target gases are adjacent to each other in the Z direction, the display on the display unit 203 is switched as shown in FIG. Specifically, in the display unit 203, the second display state in which the detection results of the combustible gas and oxygen that are alarm target gases are simultaneously displayed in the Y direction and the detection results of each of the four gases are simultaneously displayed. The displayed first display state is alternately switched every predetermined time.

  In the second display state in which the detection result of the combustible gas and oxygen illustrated on the upper side of FIG. 7 is enlarged and displayed at the same time, the numerical value (100) of the detection result (concentration) of the combustible gas is Z1 of the display unit 203. The numerical value (18.5) of the oxygen detection result (concentration) is enlarged and displayed in the Y direction on the Z2 side of the display unit 203. In the second display state, characters other than “AL1” and other than “AL2” are lit in the character display regions 31b and 32b respectively corresponding to the combustible gas and hydrogen sulfide that are alarm target gases. . Thereby, it is possible for the user to recognize that the pair of numerical values enlarged and displayed in the Y direction are the numerical value of the combustible gas detection result and the numerical value of the oxygen detection result, respectively.

  The first display state in which the detection results of each of the four types of gases shown in the lower side of FIGS. 6 and 7 are displayed at the same time, and other configurations are the same as in the first embodiment. .

  In the first modification of the first embodiment, the following effects can be obtained.

  In the first modified example of the first embodiment, as described above, in the second display state, the detection results of the two types of alarm target gases are enlarged and displayed at the same time. Accordingly, the user can be made to recognize the two types of alarm target gases at the same time in an enlarged display state, so that the two types of alarm target gases can be clearly recognized by the user. The remaining effects of the first modification of the first embodiment are similar to those of the aforementioned first embodiment.

(Second modification of the first embodiment)
Next, a second modification of the first embodiment of the present invention will be described with reference to FIG. In the second modification of the first embodiment, unlike the first embodiment in which only the detection result of one type of alarm target gas is enlarged and displayed in the second display state, one type is displayed in the second display state. In addition to the detection result of the alarm target gas, a case where other two types of gas are displayed will be described. In addition, about the structure same as the said 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the second modification of the first embodiment of the present invention, a first display state in which the detection results of each of the four types of gas are simultaneously displayed, and a detection result (concentration) of one of the gases other than the alarm target gas. ) Is not displayed on the display unit 303, and the detection result (concentration) of one type of alarm target gas is enlarged and displayed on the display unit 303, and the detection result (concentration) of two types of gas is displayed on the display unit 303. The second display state is switched every predetermined time (for example, about 1 second).

  At this time, in the second display state in which the detection result of one type of alarm target gas is enlarged and displayed on the display unit 303 and the detection result of two types of gas is displayed on the display unit 303, the result display areas 31a to 31a. The detection result of one kind of alarm target gas is configured to be enlarged and displayed by combining the seven segments and the point portions of a pair of adjacent result display areas of 34a. Specifically, as shown in the upper side of FIG. 8, the detection result of one kind of alarm target gas is expanded in the Z direction by combining the seven segments and the point portions of the pair of result display areas adjacent in the Z direction. It is configured to be displayed. In addition, you may comprise so that the detection result of 1 type of alarm target gas may be expanded and displayed in a Y direction combining 7 segments and a point of a pair of result display area | region adjacent to a Y direction.

  Here, in the second display state, whether the detection result is magnified on the Y1 side or the magnified display on the Y2 side is the first display that simultaneously displays the detection results of the four types of gases. It is determined by the display position of each gas in the state. Specifically, when the gas displayed on the Y1 side in the first display state is an alarm target gas (combustible gas or oxygen), the detection result is enlarged and displayed on the Y1 side in the second display state. The On the other hand, when the gas displayed on the Y2 side in the first display state is an alarm target gas (hydrogen sulfide or carbon monoxide), the detection result is enlarged and displayed on the Y2 side in the second display state.

  As an example of the second modification of the first embodiment, three types of gases (oxygen, hydrogen sulfide, and carbon monoxide) are within a predetermined range, while one type of gas (combustible gas) has a predetermined range. A case where the alarm target gas is exceeded will be described. In this case, the display on the display unit 303 is switched as shown in FIG. Specifically, in the display unit 303, the detection result of the combustible gas that is the alarm target gas is enlarged and displayed, and the detection result of the two kinds of gases (hydrogen sulfide and carbon monoxide) is displayed. The display state and the first display state in which the detection results of each of the four types of gas are simultaneously displayed are alternately switched every predetermined time.

  In the second display state illustrated on the upper side of FIG. 8, the numerical value (100) of the detection result (concentration) of the combustible gas is enlarged and displayed in the Z direction on the Y1 side of the display unit 303, and the first display state is shown. Similarly to the display state, the detection results of hydrogen sulfide and carbon monoxide are displayed on the Y2 side of the display unit 303. As a result, the oxygen detection result is not displayed on the display unit 303 in the second display state. In the second display state, in the character display region 31b corresponding to the combustible gas that is the alarm target gas, characters other than “AL1” are lit, while the character display corresponding to oxygen for which no detection result is displayed. All of the area 32b is not lit. Thereby, it is possible to make the user recognize that the numerical value enlarged and displayed in the Z direction is the numerical value of the detection result of the combustible gas.

  The first display state in which the detection results of each of the four types of gases illustrated on the lower side of FIG. 8 are displayed at the same time, and other configurations are the same as in the first embodiment.

  In the second modification of the first embodiment, the following effects can be obtained.

  In the second modification of the first embodiment, as described above, in the second display state, one type of detection result of gases other than the alarm target gas is not displayed on the display unit 303, but one type of detection result is displayed. The detection result of the alarm target gas is enlarged and displayed on the display unit 303, and the detection result of two kinds of gases is displayed on the display unit 303. Thus, by enlarging and displaying one type of alarm target gas, the user can clearly recognize which gas concentration has exceeded a predetermined range while simultaneously detecting the detection results of the two types of gas. Can be recognized. The remaining effects of the second modification of the first embodiment are similar to those of the aforementioned first embodiment.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG. 2, FIG. 9, and FIG. In the second embodiment, in addition to the first embodiment, a case of gas calibration and a case where predetermined information is enlarged and displayed when an abnormality occurs in the alarm body will be described. In addition, about the structure same as the said 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the second embodiment of the present invention, as in the first embodiment, the first display state (see FIG. 4) for displaying the detection results of each of the four gases at the same time is displayed in the normal state, and at the time of alarm. The detection result of the gas other than the alarm target gas is not displayed, and the detection result of the alarm target gas is displayed in an enlarged manner and switched to the second display state (see FIG. 5).

  Furthermore, in the second embodiment, in the case of gas calibration such as when the gas calibration mode is selected by the user (during calibration), as shown in FIG. 9, the detection result of the calibration target gas (calibration target gas) Only the (density) is configured to be switched from the first display state or the second display state to the third display state in which the display unit 403 is enlarged. In the third display state, in addition to the name or abbreviation of the calibration target gas (in FIG. 9, hydrogen sulfide (H 2 S)), “CALI (calibration)” indicating that gas calibration is being performed is displayed in the information display area 36. Except for the point displayed, it is the same as the second display state in which only one type of alarm target gas in the first embodiment is displayed in an enlarged manner. Further, when the gas calibration is completed, the display state of the display unit 403 is configured to return to the first display state (see FIG. 4) in which the detection results of the four types of gases are displayed simultaneously.

  In the second embodiment, the alarm main body 1 (see FIG. 2), such as failure of the sensor unit 2 (see FIG. 2), battery voltage becomes less than a specified value, or gas calibration does not end normally. When an abnormality occurs (when an error occurs), as shown in FIG. 10, the first display state or the second display state is changed to the fourth display state in which the abnormality information is enlarged and displayed on the display unit 403. It is configured to be switched from. In the fourth display state, the abnormality information “E-S” is enlarged and displayed by combining the seven segments and the dot portions of the result display areas 31a to 34a. Further, at this time, by setting the color of the backlight 3a to a color corresponding to the alarm target gas, it is possible to make the user recognize which of the sensors 21 to 24 of the sensor unit 2 has failed. . E indicates that an error has occurred, and S indicates that an abnormality has occurred in the sensor unit 2. Further, when the abnormality is resolved, the display state of the display unit 403 is configured to return to the first display state (see FIG. 4) in which the detection results of each of the four types of gas are displayed simultaneously.

In the case of an abnormality in the battery (Battery), “EB” is enlarged and displayed as information on the abnormality, and in the case of an abnormality at the time of gas calibration (Calibration), “E-C” is displayed as the abnormality information. "Is enlarged and displayed. In addition, in the information display area 36, any of the four sensors 21 to 24 (see FIG. 2) of the sensor unit 2 (in FIG. 10, the H ₂ S sensor 23 of hydrogen sulfide (H2S)) has an abnormality. It is configured to display whether it has occurred. This also allows the user to recognize which of the sensors 21 to 24 of the sensor unit 2 has failed. In addition, the other structure of 2nd Embodiment is the same as that of the said 1st Embodiment.

  In the second embodiment, the following effects can be obtained.

  In the second embodiment, as described above, in the case of gas calibration such as when the gas calibration mode is selected by the user, only the detection result of the calibration target gas (calibration target gas) is displayed on the display unit 403 in an enlarged manner. To be switched to the third display state. As a result, the calibration target gas can be clearly recognized by the user, and gas calibration can be easily performed.

  Moreover, in 2nd Embodiment, when abnormality arises in the alarm main body 1, it is comprised so that the information of abnormality may be switched to the 4th display state expandedly displayed on the display part 403. FIG. Thereby, the user can make a user recognize clearly generation | occurrence | production of abnormality and the content of abnormality. The remaining effects of the second embodiment are similar to those of the aforementioned first embodiment.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiment but by the scope of claims for patent, and further includes all modifications (modifications) within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the first to second embodiments, the example in which the display unit 3 (203, 303, 403) is configured to be able to display the detection results of four types of gas at the same time is shown, but the present invention is not limited to this. Absent. In the present invention, the display unit can simultaneously display detection results of a plurality of gases other than four types (for example, six types of gases), and can display enlarged detection results of gases exceeding a predetermined range. You may comprise.

  Moreover, although the display part 3 (203, 303, 403) showed the example comprised from the some segment 3b each arrange | positioned in the predetermined position in the said 1st-2nd embodiment, this invention does this. Not limited to. In the present invention, the display unit may be configured from other than a segment. For example, a general display unit in which a plurality of fine pixels are arranged in a matrix may be used. Thereby, it is possible to easily display the detection result of the alarm target gas or the calibration target gas and the information of the abnormality in an enlarged manner.

  In the first embodiment, when the two types of gas are alarm target gases, the second display state in which one alarm target gas is enlarged and the other alarm target gas is enlarged and displayed. Although the example in which the first display state and the two second display states are alternately switched by switching between the two display states and the first display state in a loop shape, the present invention is not limited to this. I can't. In the present invention, the first display state, the second display state in which one alarm target gas is enlarged and displayed, the first display state, and the second display state in which the other alarm target gas is enlarged and displayed. May be configured to be alternately switched between the first display state and any one of the second display states. In addition, when 3 types or 4 types of gases are alarm target gas, you may comprise similarly to the said structure.

  In the first embodiment, the example in which the first display state and the second display state are switched every predetermined time (for example, about 1 second) is shown, but the present invention is not limited to this. In the present invention, the time for switching between the first display state and the second display state may be variable. For example, when the value of the detection result of the alarm target gas itself or the rate of increase is large, the second display state in which the detection result of the alarm target gas is enlarged is held for a longer time than the normal switching time. It may be configured. Thereby, it is possible to make the user recognize that the danger level of the alarm target gas is high or that the danger level has rapidly increased.

  In the first embodiment, the second display state in which only the detection result of one kind of alarm target gas is enlarged and displayed on the display unit 3 when the concentration of the predetermined gas exceeds the corresponding predetermined range. An example of switching is shown. In the first modification of the first embodiment, the detection results of the two types of alarm target gas are simultaneously enlarged and displayed on the display unit 203 when the concentration of the predetermined gas exceeds the corresponding predetermined range. The example which switches to the display state of 2 was shown. In the second modification of the first embodiment, the detection result of one type of alarm target gas is enlarged and displayed on the display unit 303 when the concentration of the predetermined gas exceeds a corresponding predetermined range. Although the example which switches to the 2nd display state by which the detection result of other 2 types of gas is displayed on the display part 303 was shown, this invention is not limited to these. In the present invention, the configuration of the first embodiment, the configuration of the first modification of the first embodiment, and the configuration of the second modification of the first embodiment may be combined. For example, when the gas concentration exceeds the corresponding first alarm threshold value (for oxygen, below the corresponding first alarm threshold value), the configuration of the first modified example of the first embodiment or the first According to the configuration of the second modification of the embodiment, the detection result of the alarm target gas is enlarged and displayed on the display unit, and the gas concentration exceeds a second alarm threshold value that is larger than the corresponding first alarm threshold value (for oxygen). May be configured so that the detection result of the alarm target gas is enlarged and displayed on the display unit by the configuration of the first embodiment. As a result, in the case of the second-stage alarm having a high risk, the detection result of the alarm-target gas can be enlarged and displayed larger than in the case of the first-stage alarm. Whether or not the degree is high can also be recognized by the display mode.

  Moreover, in the said 1st Embodiment, although the example which lights the backlight 3a of the display part 3 at the time of an alarm was shown, this invention is not limited to this. In the present invention, for example, when the second display state continues for a predetermined time or more, or when the concentration of the alarm target gas exceeds the second alarm threshold (for oxygen, below the corresponding second alarm threshold). Only in this case, the backlight of the display unit may be turned on. Thereby, it is possible to make the user recognize the magnitude of the danger depending on whether or not the backlight is turned on. Moreover, you may comprise so that the backlight of a display part may be lighted only when two or more types of several gas are alarm object gas. Thereby, it is possible to make a user recognize whether there is a single alarm target gas or a plurality of highly urgent gases depending on whether or not the backlight is turned on.

  Moreover, although the example which does not consider the remaining amount of a battery was shown in the said 1st Embodiment, this invention is not limited to this. In the present invention, when the battery level is low and the battery voltage drops (when the battery voltage drops), the notification to the user at the time of alarm is made different from that when the battery level is high (normal time). Also good. For example, when the battery voltage is lowered, the display time of the second display state for displaying the detection result of the alarm target gas in an enlarged manner is set longer than usual, and at least one of the blinking interval of the alarm lamp unit and the generation interval of the buzzer sound One may be lengthened. As a result, it is possible to reduce power consumption due to display switching, blinking of the alarm lamp unit, and generation of a buzzer sound. In addition, when the battery voltage drops, the LED corresponding to the alarm target gas in the LED section is turned on or blinked when the display state is switched to the first display state, and the alarm target gas is supported when the display state is switched to the second display state. You may comprise so that LED to perform may not light or blink. Accordingly, the user can clearly recognize the alarm target gas by not lighting and blinking the LED in the second display state in which the user can clearly recognize the alarm target gas without lighting the LED of the LED unit. Power consumption can be reduced.

  Furthermore, when the battery voltage drops, the number of times (period) of turning on the backlight at the time of alarm may be reduced. For example, the backlight may be turned on only in the first display state (four-type gas display), or the backlight may be turned on only in the second display state (one-type gas enlarged display). . When the backlight is turned on only in the first display state, the user is warned even in the first display state by changing the color of the backlight to a color corresponding to the alarm target gas. It is possible to recognize the gas type of the target gas. As a result, power consumption can be reduced, so that it is possible to suppress a situation where the battery voltage is lowered during use of the alarm device and the alarm device is not alarmed.

  Moreover, in the said 1st-2nd embodiment, in the predetermined gas except oxygen, when the density | concentration of a predetermined gas exceeds the corresponding 1st alarm threshold value, it comprises so that it may switch to a 2nd display state. In the case of oxygen, an example is shown in which the second display state is switched when the oxygen concentration falls below the corresponding first alarm threshold. However, the present invention is not limited to this. In the present invention, the boundary value (upper limit value or lower limit value) of the predetermined range of the gas concentration used for determining whether or not to switch to the second display state is not limited to the first alarm threshold value. . That is, a threshold value different from the first alarm threshold value may be used as the boundary value of the predetermined range of the gas concentration.

  Moreover, in the said 1st-2nd embodiment, although combustible gas, oxygen, hydrogen sulfide, and carbon monoxide were shown as four types of gas which the alarm device 100 can detect, this invention is not limited to this. . In the present invention, the alarm device may be configured to detect other gases such as ozone and ammonia. At this time, in the case of a gas whose danger increases as the concentration increases, the first (second) alarm threshold is set as the upper limit value of the concentration, as in the case of the flammable gas, hydrogen sulfide and carbon monoxide. Is done. Further, in the case of a gas whose danger increases as the concentration decreases, the first (second) alarm threshold value is set as the lower limit value of the concentration, similarly to oxygen.

1 Alarm body 2 Sensor part (gas detection part)
3, 203, 303, 403 Display unit 3b Segment 31 Combustible gas display area (display area)
32 O ₂ display area (display area)
33 H ₂ S display area (display area)
34 CO display area (display area)
100 alarm

Claims (5)

A gas detector capable of detecting a plurality of gases;
A display unit capable of displaying in a first display state for simultaneously displaying detection results of each of the plurality of gases,
When the concentration of a predetermined gas, which is a part of the plurality of gases, exceeds a predetermined range, the detection result of at least a part of the gases other than the predetermined gas is displayed on the display unit. Without being configured to be switched to a second display state in which the detection result of the predetermined gas is enlarged and displayed on the display unit,
The display unit is composed of a plurality of segments, and includes a plurality of display areas for displaying the detection results of each of the plurality of gases,
In the second display state, the alarm device is configured to enlarge and display the detection result of the predetermined gas on the display unit by combining the plurality of segments of the display areas adjacent to each other. . A gas detector capable of detecting a plurality of gases;
A display unit capable of displaying in a first display state for simultaneously displaying detection results of each of the plurality of gases,
When the concentration of a predetermined gas, which is a part of the plurality of gases, exceeds a predetermined range, the detection result of at least a part of the gases other than the predetermined gas is displayed on the display unit. Without being configured to be switched to a second display state in which the detection result of the predetermined gas is enlarged and displayed on the display unit,
Character wherein the display unit, showing the in the second display state, as well as enlarge the detection results of the previous SL predetermined gas to the display unit, the concentration of the predetermined gas exceeds the predetermined range Is displayed in an area adjacent to the display area of the predetermined gas in the display area of the detection results of each of the plurality of gases in the first display state .   The alarm according to claim 1, wherein the first display state and the second display state are alternately switched when the concentration of the predetermined gas exceeds the predetermined range. vessel.   In the case of gas calibration, if the detection result of the gas to be calibrated is switched to the third display state in which the display unit is enlarged or displayed on the display unit, or if an abnormality occurs in the alarm body, the information on the abnormality is displayed on the display unit. The alarm device according to any one of claims 1 to 3, wherein at least one of switching to a fourth display state displayed in an enlarged manner is performed.   The alarm device according to any one of claims 1 to 4, further comprising: an alarm device main body in which the gas detection unit and the display unit are arranged and formed in a portable size.

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