JP7451217B2 - Charging systems and chargers for explosion-proof equipment - Google Patents

Description

The present invention relates to a charging system and charger for explosion-proof equipment, and more particularly to a charging system for explosion-proof equipment including a gas detector and a charger for the gas detector.

Conventionally, gas detectors equipped with rechargeable batteries are known (for example, see Patent Document 1).

The above-mentioned Patent Document 1 discloses a portable gas detector that detects a test gas such as oxygen gas and hydrogen sulfide gas. This portable gas detector is equipped with a rechargeable battery pack (rechargeable battery). Further, this portable gas detector is configured to be driven by a rechargeable battery pack.

JP2006-209438A

Here, although it is not specified in Patent Document 1, there is a desire to use the portable gas detector as described in Patent Document 1 as a temporary stationary gas detector that is used by placing it in a fixed position. There is. However, in the portable gas detector described in Patent Document 1, even when the portable gas detector is used as a temporary gas detector, the gas detector is driven by the rechargeable battery pack. However, there is a disadvantage that the operating time of the portable gas detector is short. Therefore, there is a problem in that it is difficult to use the portable gas detector as a temporary gas detector.

This invention was made in order to solve the above problems, and one object of the invention is to be able to charge a rechargeable battery attached to a gas detector and to connect it to a charger. An object of the present invention is to provide a charging system and a charger for explosion-proof equipment, which can use a gas detector as a temporary gas detector.

In order to achieve the above object, a charging system for explosion-proof equipment according to a first aspect of the present invention includes an explosion-proof gas detector to which a rechargeable battery can be attached and removed, and a rechargeable battery attached to the gas detector. Depending on whether a rechargeable battery is installed in the charger and the gas detector, there is a charging mode in which the rechargeable battery is charged, and a commercial power drive mode in which the gas detector is driven by power from the commercial power supply. , and a control unit that performs control to select an operation mode of the charger.

In the charging system for explosion-proof equipment according to the first aspect of the invention, as described above, the charging mode for charging the rechargeable battery and the charging mode for charging the rechargeable battery from the commercial power source are determined based on whether or not the rechargeable battery is installed in the gas detector. A control unit is provided to perform control to select an operation mode of the charger from among a commercial power supply drive mode in which the gas detector is driven by the electric power of the charger. Thereby, when the charging mode is selected by the control unit by attaching the rechargeable battery to the gas detector, the rechargeable battery attached to the gas detector can be charged. In addition, if the commercial power drive mode is selected by the control unit by not installing a rechargeable battery in the gas detector, the gas detector can be driven by power from the commercial power supply, so it is not connected to the charger. The gas detector can be used as a temporary gas detector. As a result, we have developed an explosion-proof device that can charge the rechargeable battery attached to the gas detector and use the gas detector connected to the charger as a temporary gas detector. A charging system can be provided.

In the charging system for explosion-proof equipment according to the first aspect, preferably, the control unit performs control to detect whether or not a rechargeable battery is attached to the gas detector based on a voltage corresponding to the rechargeable battery. It is configured as follows. With this configuration, it is possible to detect whether or not a rechargeable battery is installed in the gas detector based on the voltage that changes depending on whether or not a rechargeable battery is installed. It is possible to easily and reliably detect whether or not the device is attached.

In the charging system for explosion-proof equipment according to the first aspect, preferably, the gas detector is configured such that a dry battery can be attached and removed, and the control unit is configured to determine whether a rechargeable battery or a dry battery is attached to the gas detector. If it is detected that a rechargeable battery is installed in the gas detector, the charging mode is selected, and if it is detected that a dry battery is installed in the gas detector, the gas detector The controller is configured to perform control to select a dry cell mode in which no power is supplied to the dry cell batteries. With this configuration, when a rechargeable battery is installed in the gas detector and requires charging, the charging mode is selected by the control unit, so that the rechargeable battery installed in the gas detector is properly charged. can do. In addition, if the gas detector does not require charging because the dry cell battery is installed, the control unit selects the dry battery mode so that no power is supplied to the dry cell battery installed in the gas detector. can. As a result, it is possible to prevent the dry cell battery installed in the gas detector from being charged incorrectly, thereby suppressing the occurrence of electrolyte leakage from the dry cell battery due to incorrect charging. I can do it.

In this case, preferably, one of the rechargeable battery and the dry battery includes a side electrode on the outer circumferential side, the gas detector includes a terminal part electrically connected to the side electrode, and the control part preferably includes a side electrode and the terminal part. The gas detector is configured to perform control to detect whether a rechargeable battery or a dry battery is attached to the gas detector based on whether or not the gas detector is connected. With this configuration, it is possible to detect whether a rechargeable battery or a dry battery is installed in the gas detector by simply detecting whether or not the side electrode and the terminal part are connected. It is possible to easily detect whether a rechargeable battery or a dry battery is installed in a gas detector.

In the charging system for explosion-proof equipment according to the first aspect, preferably, the gas detector is configured to detect gas using electric power from a commercial power source in a commercial power supply drive mode when the gas detector is driven by electric power from a rechargeable battery. It includes a common wiring section used both when driving the device and when driving the device. With this configuration, the wiring section for driving the gas detector with power from the rechargeable battery and the wiring section for driving the gas detector with power from the AC power supply in the commercial power supply drive mode can be separated. Since the number of wiring parts can be reduced compared to the case where the gas detector is provided independently, the structure of the gas detector can be simplified accordingly. In addition, in an explosion-proof gas detector whose structure is subject to severe restrictions, it is very effective to be able to simplify the structure by using a common wiring section.

In the system for charging explosion-proof equipment according to the first aspect, preferably, the charger includes a protection circuit that controls power supplied to the gas detector. With this configuration, the structure of the gas detector can be simplified compared to the case where the gas detector is provided with a protection circuit.

A charger according to a second aspect of the present invention includes a charger main body that charges a rechargeable battery attached to a gas detector to which a rechargeable battery can be detached, and a battery charger based on whether or not the rechargeable battery is attached to the gas detector. and a control unit that performs control to select an operation mode from a charging mode for charging the rechargeable battery and a commercial power supply drive mode for driving the gas detector using power from a commercial power supply.

As described above, in the charger according to the second aspect of the invention, the charging mode for charging the rechargeable battery and the charge mode for charging the rechargeable battery based on whether or not the rechargeable battery is installed in the gas detector, and the A control unit is provided that performs control to select an operation mode from among the commercial power supply drive modes for driving the detector. As a result, similar to the charging system for explosion-proof equipment according to the first aspect, it is possible to charge the rechargeable battery attached to the gas detector, and to charge the gas detector connected to the charger. A charger that can be used as a gas detector can be provided.

According to the present invention, as described above, the rechargeable battery attached to the gas detector can be charged, and the gas detector connected to the charger can be used as a temporary gas detector. I can do it.

FIG. 1 is a schematic diagram showing a charging system for explosion-proof equipment according to an embodiment. FIG. 2 is a schematic diagram for explaining a charging mode of a charging system for explosion-proof equipment according to an embodiment. FIG. 2 is a schematic diagram for explaining a commercial power supply driving mode of a charging system for explosion-proof equipment according to an embodiment. FIG. 2 is a schematic diagram for explaining a rechargeable battery and a dry battery of a charging system for explosion-proof equipment according to an embodiment. FIG. 2 is a schematic diagram for explaining a protection circuit of a charging system for explosion-proof equipment according to an embodiment. 2 is a flowchart for explaining operation mode selection processing of a charging system for explosion-proof equipment according to an embodiment.

Embodiments of the present invention will be described below based on the drawings.

The configuration of a charging system 100 for explosion-proof equipment according to one embodiment will be described with reference to FIGS. 1 to 5.

(Configuration of charging system for explosion-proof equipment)
As shown in FIG. 1, a charging system 100 for explosion-proof equipment includes an explosion-proof gas detector 10 with a removable rechargeable battery 121, and a non-explosion-proof charging system that charges the rechargeable battery 121 attached to the gas detector 10. It is equipped with a container 20. The gas detector 10 has an explosion-proof structure (intrinsically safe explosion-proof structure, etc.) based on a predetermined explosion-proof standard.

(Configuration of gas detector)
The configuration of the gas detector 10 will be explained.

The gas detector 10 is a portable gas detector. The gas detector 10 is configured to be portable by a user.

The gas detector 10 includes an internal circuit 11 to which power is supplied. Internal circuit 11 includes a control section 11a and a gas sensor 11b.

The control unit 11a includes a CPU (Central Processing Unit), and is configured to control the overall operation of the gas detector 10, such as the gas detection operation by the gas sensor 11b.

The gas sensor 11b is configured to detect a gas to be detected. The gas sensor 11b detects gases such as oxygen, flammable gas (such as methane), hydrogen sulfide, and carbon monoxide. One or more gas sensors 11b are provided depending on the type of gas to be detected.

Note that the internal circuit 11 includes, in addition to the control section 11a and the gas sensor 11b, a liquid crystal display section, an LED lighting section, a gas suction pump, and the like.

Further, the gas detector 10 includes a plurality (two) of battery units (battery packs) 12a and 12b. The plurality of battery units 12a and 12b are connected in parallel. Further, the plurality of battery units 12a and 12b are configured to drive the gas detector 10 by supplying power to the internal circuit 11. Each of the plurality of battery units 12a and 12b includes a plurality of (two) rechargeable batteries 121 connected in series.

Further, the gas detector 10 includes a plurality (two) of power supply wiring sections 13a and 13b. The power supply wiring section 13a is configured to electrically connect the internal circuit 11 and the battery section 12a. The power supply wiring section 13a is configured to supply power from the rechargeable battery 121 of the battery section 12a to the internal circuit 11. Further, the power supply wiring section 13b is configured to electrically connect the internal circuit 11 and the battery section 12b. The power supply wiring section 13b is configured to supply power from the rechargeable battery 121 of the battery section 12b to the internal circuit 11. Note that the power supply wiring sections 13a and 13b are an example of a "wiring section" in the claims.

Further, the gas detector 10 includes a plurality (two) of charging wiring sections 14a and 14b. The charging wiring section 14a is configured to electrically connect the charger 20 and the battery section 12a. The charging wiring section 14a is configured to supply power from the charger 20 to the rechargeable battery 121 of the battery section 12a. Further, the charging wiring section 14b is configured to electrically connect the charger 20 and the battery section 12b. The charging wiring section 14b is configured to supply power from the charger 20 to the rechargeable battery 121 of the battery section 12b.

Further, the gas detector 10 includes a plurality of externally exposed terminal portions 15. The plurality of external exposed terminal sections 15 are configured to be electrically connected to a plurality of external exposed terminal sections 21 of the charger 20, which will be described later. Thereby, it is possible to supply power from the charger 20 to the gas detector 10 and charge the rechargeable battery 121 attached to the gas detector 10.

(Charger configuration)
The configuration of charger 20 will be explained.

The charger 20 is configured to be used by being connected to a commercial power source 40 that supplies AC power via an AC adapter 30 that converts AC power to DC power. Further, the charger 20 is configured to be used while being placed on a predetermined placement surface such as a desk.

The charger 20 includes a charger main body 20a. The charger main body 20a is provided with a plurality of externally exposed terminal portions 21 so as to correspond to the plurality of externally exposed terminal portions 15 of the gas detector 10. The plurality of externally exposed terminal parts 21 are configured to be electrically connected to the plurality of externally exposed terminal parts 15 of the gas detector 10. The plurality of externally exposed terminal portions 21 are constituted by spring terminal portions. The plurality of externally exposed terminal portions 21 are configured to elastically deform when the gas detector 10 is connected to the charger 20.

Further, a power supply circuit 22 is provided in the charger main body 20a. The power supply circuit 22 includes a regulator and is configured to be able to control current and voltage. Specifically, the power supply circuit 22 is configured to control the current and voltage of the power from the commercial power supply 40 via the AC adapter 30 based on a control signal from the control unit 24 described later.

Further, a relay 23 is provided in the charger main body 20a. Relay 23 is provided to switch the supply of charging power to the plurality of battery units 12a and 12b. Specifically, the relay 23 switches between a first state in which charging power is supplied to the battery section 12a and a second state in which charging power is supplied to the battery section 12b based on a control signal from the control section 24. Configured to switch.

Further, a control section 24 is provided in the charger main body 20a. The control unit 24 includes a CPU (Central Processing Unit), and is configured to control the overall operation of the charger 20, such as the operation of charging the gas detector 10.

Here, in the present embodiment, as shown in FIGS. 2 and 3, the control unit 24 selects a charging mode for charging the rechargeable battery 121 based on whether or not the rechargeable battery 121 is attached to the gas detector 10. and a commercial power supply drive mode in which the gas detector 10 is driven by electric power from the commercial power supply 40. Note that in FIGS. 2 and 3, illustration of some components such as the control unit 24 is omitted for ease of understanding.

As shown in FIG. 2, the control unit 24 is configured to perform control to select a charging mode for charging the rechargeable battery 121 when the gas detector 10 is equipped with the rechargeable battery 121. In the charging mode, the control unit 24 is configured to perform control to charge the plurality of battery units 12a and 12b while switching the battery unit to be charged.

Specifically, the control unit 24 is configured to control switching the battery unit to be charged to the battery unit 12a by switching the relay 23 to the first state. In this case, since the power supply circuit 22 is electrically connected to the charging wiring section 14a, power from the power supply circuit 22 (commercial power supply 40) is supplied to the rechargeable battery 121 of the battery section 12a via the charging wiring section 14a. be done. Thereby, the battery section 12a is charged.

Similarly, the control unit 24 is configured to control switching the battery unit to be charged to the battery unit 12b by switching the relay 23 to the second state. In this case, since the power supply circuit 22 is electrically connected to the charging wiring section 14b, power from the power supply circuit 22 (commercial power supply 40) is supplied to the rechargeable battery 121 of the battery section 12b via the charging wiring section 14b. be done. Thereby, the battery section 12b is charged.

The control unit 24 is configured to control charging of the plurality of battery units 12a and 12b while switching the battery units to be charged at regular time intervals, for example. Furthermore, when controlling the charging of the plurality of battery units 12a and 12b, the control unit 24 controls the power supply circuit 22 to supply power by constant current constant voltage control that supplies power with a constant current and constant voltage. is configured to do so. Note that the constant current (constant voltage) does not necessarily have to be a completely constant value, but means that the current value (voltage value) falls within a predetermined range.

Further, as shown in FIG. 3, when the rechargeable battery 121 is not attached to the gas detector 10, the control unit 24 selects a commercial power supply drive mode in which the gas detector 10 is driven by power from the commercial power supply 40. configured to perform control. In the commercial power supply drive mode, the control unit 24 is configured to control supply of power from the commercial power supply 40 via the AC adapter 30 and the power supply circuit 22 to the internal circuit 11 .

In the commercial power supply drive mode, the power supply circuit 22 is electrically connected to the power supply wiring part 13a and the charging wiring part 14a via the relay 23, so that the power from the power supply circuit 22 (commercial power supply 40) is connected to the power supply wiring part 13a and the charging wiring part 14a through the relay 23. It is supplied to the internal circuit 11 via the charging wiring section 13a and the charging wiring section 14a. As a result, power is supplied to the internal circuit 11. Although FIG. 3 shows an example in which power is supplied to the internal circuit 11 via the power supply wiring section 13a and the charging wiring section 14a, power is supplied to the internal circuit 11 via the power supply wiring section 13b and the charging wiring section 14b. Power may be supplied to the internal circuit 11.

The power supply wiring section 13a (13b) is used both when driving the gas detector 10 with electric power from the rechargeable battery 121 and when driving the gas detector 10 with electric power from the commercial power supply 40 in the commercial power supply drive mode. It is configured to be commonly used in In addition, the charging wiring section 14a (14b) is used to charge the rechargeable battery 121 attached to the gas detector 10 with the power from the commercial power source 40 in the charging mode, and to use the power from the commercial power source 40 in the commercial power drive mode. It is configured to be used in common both when driving the gas detector 10 and when driving the gas detector 10.

Further, when controlling the power supply to the internal circuit 11, the control unit 24 is configured to control the power supply circuit 22 so as to supply power by constant voltage control to supply power at a constant voltage. Note that a constant voltage does not necessarily have to be a completely constant value, but means that the voltage value falls within a predetermined range.

Further, in the present embodiment, the control unit 24 is configured to perform control to detect whether or not the rechargeable battery 121 is attached to the gas detector 10 based on the voltage corresponding to the rechargeable battery 121. . Specifically, the control unit 24 determines whether the rechargeable battery 121 is attached to the gas detector 10 based on both the voltage corresponding to the rechargeable battery 121 of the battery unit 12a and the voltage corresponding to the rechargeable battery 121 of the battery unit 12b. It is configured to perform control to detect whether or not the

The control unit 24 acquires the voltage corresponding to the rechargeable battery 121 of the battery unit 12a and the voltage corresponding to the rechargeable battery 121 of the battery unit 12b from the gas detector 10 via the externally exposed terminal unit 15 and the externally exposed terminal unit 21. The system is configured to perform control such as: Then, the control unit 24 determines that both the voltage corresponding to the rechargeable battery 121 of the battery unit 12a and the voltage corresponding to the rechargeable battery 121 of the battery unit 12b obtained from the gas detector 10 are set to a predetermined threshold value (for example, 0. 05V) or less, control is performed to detect that the rechargeable battery 121 is not attached to the gas detector 10. Further, the control unit 24 controls the voltage of the rechargeable battery 121 of the battery unit 12a acquired from the gas detector 10 and the voltage of the rechargeable battery 121 of the battery unit 12b that are both within a predetermined range (for example, 1.4V). 4.0 V or less), the gas detector 10 is configured to perform control to detect that the rechargeable battery 121 is attached.

Moreover, in this embodiment, as shown in FIG. 4, the gas detector 10 is configured so that not only a rechargeable battery 121 which is a secondary battery but also a dry battery 122 which is a primary battery can be attached and detached. That is, when the gas detector 10 is battery-driven, it is configured to be driven by either the rechargeable battery 121 or the dry battery 122. The rechargeable battery 121 and the dry battery 122 have the same cylindrical shape. For the gas detector 10, for example, an AA-sized dry battery 122 and a rechargeable battery 121 having the same shape as the AA-sized dry battery 122 can be used.

The rechargeable battery 121 includes side electrodes 121a other than the positive electrode and the negative electrode on the outer peripheral side surface. Specifically, the rechargeable battery 121 includes a side electrode 121a on the outer peripheral side near the negative electrode. On the other hand, the dry battery 122 does not include a side electrode on the outer peripheral side surface. For example, in the rechargeable battery 121, a side electrode 121a is formed by cutting a part of the exterior (label), and in the dry battery 122, the side electrode is not formed by not cutting the exterior. Such an exterior can be provided to the user by the manufacturer of the charging system 100 for explosion-proof equipment, for example. The side electrode 121a is configured to be electrically connected to the discrimination terminal section 16 provided on the gas detector 10. Only one determination terminal section 16 is provided for a plurality of (four) rechargeable batteries 121. Note that the discrimination terminal section 16 is an example of a "terminal section" in the claims.

Further, in the present embodiment, the control unit 24 detects whether the rechargeable battery 121 or the dry battery 122 is attached to the gas detector 10, and also detects whether the rechargeable battery 121 is attached to the gas detector 10. If detected, a charging mode is selected, and if it is detected that a dry battery is attached to the gas detector 10, a dry battery mode is selected in which power is not supplied to the dry battery 122 attached to the gas detector 10. is configured to do so.

Specifically, the control unit 24 detects whether the rechargeable battery 121 or the dry battery 122 is attached to the gas detector 10 based on whether the side electrode 121a and the discrimination terminal unit 16 are connected. The system is configured to perform control such as: The control unit 24 is configured to perform control to detect that the rechargeable battery 121 is attached to the gas detector 10 when the side electrode 121a and the discrimination terminal unit 16 are connected. Further, the control unit 24 is configured to perform control to detect that the dry battery 122 is attached to the gas detector 10 when the side electrode 121a and the discrimination terminal unit 16 are not connected.

Further, as shown in FIG. 1, the charger 20 includes a protection circuit 25. The protection circuit 25 is provided between the power supply circuit 22 and the relay 23. Furthermore, the protection circuit 25 is configured to control the power supplied to the gas detector 10.

Specifically, as shown in FIG. 5, the protection circuit 25 is constituted by an electric circuit including a capacitor, a resistor, a fuse, a thyristor, and a reference voltage IC. The protection circuit 25 is configured such that when the voltage exceeds a predetermined value, current flows through the reference voltage IC, turning on the thyristor and blowing out the fuse. Thereby, the protection circuit 25 is configured to cut off power supply to the gas detector 10 when the voltage exceeds a predetermined value. Note that the example shown in FIG. 5 is an example of the protection circuit 25, and the protection circuit 25 is not limited to the example shown in FIG. As the reference voltage IC, a series type reference IC or a parallel type (shunt type) reference IC can be used.

The protection circuit 25 is provided on a sub-board that is separate from the main board on which the power supply circuit 22, the control section 24, and the like are provided.

(Operation mode selection process)
Next, with reference to FIG. 6, the operation mode selection process by the charger 20 of the explosion-proof device charging system 100 of this embodiment will be described based on a flowchart. Each process in the flowchart is performed by the control unit 24 of the charger 20.

When the charger 20 is powered on, as shown in FIG. 6, first, in step S1, the charger 20 is operated to enter a standby state.

Then, in step S2, it is detected whether the gas detector 10 is set in the charger 20. If it is detected in step S2 that the gas detector 10 is not set in the charger 20, the process advances to step S1 and the standby state is continued. Further, in step S2, if it is detected that the gas detector 10 is set in the charger 20, the process advances to step S3.

Then, in step S3, it is detected based on the voltage whether or not a battery (rechargeable battery 121 or dry battery 122) is attached to the gas detector 10. If it is detected in step S3 that no battery is attached to the gas detector 10, the process proceeds to step S4.

Then, in step S4, the commercial power supply drive mode is selected. In the commercial power supply drive mode, electric power is supplied to the gas detector 10 by constant voltage control, and the gas detector 10 is driven. After that, the operation mode selection process ends.

If it is detected in step S3 that a battery (rechargeable battery 121 or dry battery 122) is attached to the gas detector 10, the process advances to step S5.

Then, in step S5, it is detected whether or not the rechargeable battery 121 is attached to the gas detector 10. That is, in step S5, it is detected whether the gas detector 10 is equipped with either the rechargeable battery 121 or the dry battery 122, based on whether the side electrode 121a and the discrimination terminal section 16 are connected. If it is detected in step S5 that the rechargeable battery 121 is attached to the gas detector 10, the process advances to step S6.

Then, in step S6, a charging mode is selected. In the charging mode, electric power is supplied to the gas detector 10 by constant current and constant voltage control, and the rechargeable battery 121 of the gas detector 10 is charged. After that, the operation mode selection process ends.

If it is detected in step S5 that the rechargeable battery 121 is not attached to the gas detector 10, the process proceeds to step S7. That is, if it is detected in step S5 that the dry battery 122 is attached to the gas detector 10, the process advances to step S7.

Then, in step S7, dry battery mode is selected. In the dry battery mode, no power is supplied to the gas detector 10. After that, the operation mode selection process ends.

(Effects of this embodiment)
In this embodiment, the following effects can be obtained.

In the present embodiment, as described above, the charging mode is set to charge the rechargeable battery 121 based on whether or not the rechargeable battery 121 is attached to the gas detector 10, and the gas detector 10 is charged with electric power from the commercial power source 40. A control unit 24 is provided to perform control to select an operation mode of the charger 20 from among the commercial power supply drive modes for driving the charger 20 . Thereby, when the charging mode is selected by the control unit 24 by attaching the rechargeable battery 121 to the gas detector 10, the rechargeable battery 121 attached to the gas detector 10 can be charged. Furthermore, if the commercial power supply drive mode is selected by the control unit 24 by not installing the rechargeable battery 121 in the gas detector 10, the gas detector 10 can be driven by the power from the commercial power supply 40. The gas detector 10 connected to the charger 20 can be used as a temporary gas detector 10. As a result, the rechargeable battery 121 attached to the gas detector 10 can be charged, and the gas detector 10 connected to the charger 20 can be used as a temporary gas detector 10. .

Further, in the present embodiment, as described above, the control unit 24 is configured to perform control to detect whether or not the rechargeable battery 121 is attached to the gas detector 10 based on the voltage corresponding to the rechargeable battery 121. Configure. With this, it is possible to detect whether or not the rechargeable battery 121 is installed in the gas detector 10 based on the voltage that changes depending on whether the rechargeable battery 121 is installed. 121 is attached or not can be easily and reliably detected.

Further, in this embodiment, as described above, the gas detector 10 is configured such that the dry battery 122 can be attached and detached. Further, the control unit 24 detects which of the rechargeable battery 121 and the dry battery 122 is attached to the gas detector 10, and when it is detected that the rechargeable battery 121 is attached to the gas detector 10, When the charging mode is selected and it is detected that the dry battery 122 is attached to the gas detector 10, control is performed to select the dry battery 122 mode in which power is not supplied to the dry battery 122 of the gas detector 10. . As a result, when charging is required because the rechargeable battery 121 is attached to the gas detector 10, the charging mode is selected by the control unit 24, so that the rechargeable battery 121 attached to the gas detector 10 is properly charged. Can be charged. In addition, when the dry battery 122 is installed in the gas detector 10 and does not require charging, the dry battery 122 mode is selected by the control unit 24 to supply power to the dry battery 122 installed in the gas detector 10. You can prevent it from happening. As a result, it is possible to prevent the dry cell battery 122 attached to the gas detector 10 from being charged accidentally, thereby preventing leakage of electrolyte from the dry cell battery 122 due to incorrect charging. Can be suppressed.

Further, in this embodiment, as described above, the rechargeable battery 121 is configured to include the side electrode 121a on the outer peripheral side surface. Further, the gas detector 10 is configured to include a discrimination terminal portion 16 electrically connected to the side electrode 121a. Further, the control unit 24 is controlled to detect whether the rechargeable battery 121 or the dry battery 122 is attached to the gas detector 10 based on whether the side electrode 121a and the discrimination terminal unit 16 are connected. Configure it to do so. Thereby, it is possible to detect which of the rechargeable battery 121 and the dry battery 122 is attached to the gas detector 10 by simply detecting whether or not the side electrode 121a and the discrimination terminal section 16 are connected. Therefore, it is possible to easily detect whether the gas detector 10 is equipped with either the rechargeable battery 121 or the dry battery 122.

Further, in this embodiment, as described above, when the gas detector 10 is driven by the electric power from the rechargeable battery 121, and in the commercial power supply drive mode, the gas detector 10 is driven by the electric power from the commercial power supply 40. It is configured to include common power supply wiring portions 13a and 13b that are used both when driving 10. As a result, the wiring section for driving the gas detector 10 with the power from the rechargeable battery 121 and the wiring section for driving the gas detector 10 with the power from the AC power supply in the commercial power supply drive mode can be separated. Since the number of wiring parts can be reduced compared to the case where they are provided independently, the structure of the gas detector 10 can be simplified accordingly. In addition, in the explosion-proof gas detector 10, which has strict structural restrictions, it is very effective to be able to simplify the structure by using the common power supply wiring portions 13a and 13b.

Furthermore, in this embodiment, as described above, the charger 20 is configured to include the protection circuit 25 that controls the power supplied to the gas detector 10. Thereby, the structure of the gas detector 10 can be simplified compared to the case where the gas detector 10 is provided with the protection circuit 25.

[Modified example]
Note that the embodiments disclosed this time should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims rather than the description of the embodiments described above, and further includes all changes (modifications) within the meaning and range equivalent to the claims.

For example, in the above embodiment, the gas detector is an explosion-proof device and the charger is a non-explosion-proof device, but the present invention is not limited to this. In the present invention, the charger may also be an explosion-proof device.

Further, in the above embodiment, an example was shown in which the control unit of the present invention is provided in a charger, but the present invention is not limited to this. In the present invention, the control unit of the present invention may be provided in a gas detector. In other words, the control unit of the gas detector may be configured to perform control such as selecting the operation mode of the charger.

Further, in the above embodiment, an example was shown in which the gas detector is configured to be equipped with four rechargeable batteries or four dry batteries, but the present invention is not limited to this. In the present invention, the gas detector may be configured to be equipped with one, two, three, five or more rechargeable batteries or dry batteries.

Further, in the embodiment described above, an example was shown in which the gas detector is configured such that a rechargeable battery and a dry cell battery can be attached and detached (usable), but the present invention is not limited to this. In the present invention, the gas detector may be configured such that only the rechargeable battery can be attached and detached (usable).

Further, in the above embodiment, an example was shown in which the gas detector includes two battery units, but the present invention is not limited to this. In the present invention, the gas detector may include one or more battery units.

Further, in the above embodiment, an example was shown in which the battery section included two batteries, but the present invention is not limited to this. In the present invention, the battery section may include one or more batteries.

Further, in the above embodiment, the control unit is configured to perform control to detect whether or not a rechargeable battery is attached to the gas detector based on the voltages of the rechargeable batteries of the two battery units. However, the present invention is not limited thereto. In the present invention, the control unit is configured to perform control to detect whether or not a rechargeable battery is attached to the gas detector based on the voltage of the rechargeable battery in only one of the two battery units. may have been done.

Further, in the above embodiment, an example is shown in which the rechargeable battery is provided with side electrodes, but the present invention is not limited to this. In the present invention, the dry battery may be provided with side electrodes.

Further, in the above embodiment, an example was shown in which the side electrode was provided near the negative electrode, but the present invention is not limited to this. In the present invention, the side electrode may be provided near the positive electrode.

Further, in the above embodiment, an example was shown in which only one discrimination terminal section is provided for a plurality of batteries, but the present invention is not limited to this. In the present invention, one discrimination terminal may be provided for each of the plurality of battery parts. Furthermore, one discrimination terminal section may be provided for each of the plurality of batteries.

Further, in the above embodiment, the power supply wiring section is used both when driving the gas detector with power from the rechargeable battery and when driving the gas detector with power from the commercial power supply in the commercial power supply drive mode. Although an example configured to be commonly used has been shown, the present invention is not limited to this. In the present invention, the wiring section for driving the gas detector with electric power from the rechargeable battery and the wiring section for driving the gas detector with electric power from the commercial power source in the commercial power supply drive mode are independent of each other. They may be provided separately.

Further, in the above embodiment, the charging wiring section is configured to detect gas when charging the rechargeable battery attached to the gas detector using power from a commercial power source in the charging mode, and when using power from the commercial power source in the commercial power drive mode. Although an example has been shown in which the device is configured to be used in common both when driving a device, the present invention is not limited to this. In the present invention, a wiring section is provided when a rechargeable battery attached to a gas detector is charged with power from a commercial power source in charging mode, and a wiring section is used when a gas detector is driven with power from a commercial power source in commercial power drive mode. The wiring portions may be provided independently and separately from each other.

Further, in the above embodiment, an example is shown in which the protection circuit is provided in the charger, but the present invention is not limited to this. In the present invention, a protection circuit may be provided in the gas detector.

Further, in the above embodiment, for convenience of explanation, the control processing is explained using a flow-driven flow in which the control processing is performed in order along the processing flow, but the present invention is not limited to this. In the present invention, the control processing may be performed by event-driven processing that executes processing on an event-by-event basis. In this case, it may be completely event-driven, or it may be a combination of event-driven and flow-driven.

10 Gas detector 13a, 13b Power supply wiring section (wiring section)
16 Discrimination terminal section (terminal section)
20 Charger 20a Charger body 24 Control unit 25 Protection circuit 40 Commercial power supply 100 Charging system for explosion-proof equipment 121 Rechargeable battery 121a Side electrode 122 Dry battery

Claims (7)

Explosion-proof gas detector with removable rechargeable battery,
a charger that charges the rechargeable battery attached to the gas detector;
Based on whether or not the rechargeable battery is attached to the gas detector, a charging mode in which the rechargeable battery is charged, and a commercial power supply driving mode in which the gas detector is driven by power from a commercial power supply. , a control unit that performs control to select an operation mode of the charger, and a charging system for explosion-proof equipment. The control unit is configured to perform control to detect whether or not the rechargeable battery is attached to the gas detector based on a voltage corresponding to the rechargeable battery. Charging system for explosion-proof equipment. The gas detector is configured such that a dry battery can be attached and detached,
The control unit detects whether the rechargeable battery or the dry cell battery is attached to the gas detector, and when it is detected that the rechargeable battery is attached to the gas detector, the controller mode is selected, and if it is detected that the dry battery is installed in the gas detector, control is performed to select a dry battery mode in which power is not supplied to the dry battery installed in the gas detector. The charging system for explosion-proof equipment according to claim 1 or 2, wherein: One of the rechargeable battery and the dry battery includes a side electrode on an outer peripheral side surface,
The gas detector includes a terminal portion electrically connected to the side electrode,
The control unit is configured to perform control to detect whether the rechargeable battery or the dry battery is attached to the gas detector based on whether or not the side electrode and the terminal unit are connected. A charging system for explosion-proof equipment according to claim 3, comprising: The gas detector is used both when driving the gas detector with electric power from the rechargeable battery and when driving the gas detector with electric power from the commercial power source in the commercial power supply drive mode. The charging system for explosion-proof equipment according to any one of claims 1 to 4, comprising a common wiring section. 6. The charging system for explosion-proof equipment according to claim 1, wherein the charger includes a protection circuit that controls power supplied to the gas detector. a charger main body that charges the rechargeable battery attached to a gas detector to which the rechargeable battery is detachable;
Based on whether or not the rechargeable battery is attached to the gas detector, a charging mode in which the rechargeable battery is charged, and a commercial power supply driving mode in which the gas detector is driven by power from a commercial power supply. , a control unit that performs control to select an operation mode.

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