JPS6111437B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an emergency light checker for checking the status of emergency lights.

[Background technology]

Emergency light checkers are used to check whether emergency lights used during commercial power outages will remain lit normally for a certain period of time in an actual emergency, and are normally used to check the capacity of storage batteries, which are the emergency power source. A checker is used. A battery checker is a device that artificially turns off commercial power for a certain period of time, turns on emergency lights, tests whether the storage battery maintains a voltage above a certain level even after a certain period of time, and displays the result using an indicator light. .

FIG. 1 is a circuit diagram of an emergency light having such a battery checker and forming the basis of this invention.
In the figure, the regular illumination lamp includes a fluorescent lamp 1 and a fluorescent lamp 2, and a regular illumination lamp blinking switch 3.
and is connected to a commercial power source 5 via a check switch 4. Emergency lighting consists of a charging circuit, an emergency lighting main circuit, and a battery checker. The charging circuit includes a power transformer 6, a rectifier 7, and a current limiting resistor 8, and has an input end connected to a commercial power source 5 via a check switch 4, and an output end connected to a storage battery 9, which will be described later. The emergency light main circuit uses a fluorescent lamp 1, which is a commercial light source, as an emergency light source, and includes a storage battery 9, which is an emergency power source, and a high-frequency inverter 1.
0, a power failure detection relay 11 connected in parallel with the input end of the charging circuit, a normally closed contact 12 of the power failure detection relay 11 provided between the storage battery 9 and the high-frequency inverter 10, and the fluorescent lamp 1. It is composed of contacts 13 and 14 for switching the connection between the high frequency inverter 10 side and the stationary illumination coil 2 side.

The battery checker is composed of a storage battery voltage detection circuit Va and an inspection detection display circuit Vb consisting of a switching circuit having hysteresis characteristics. To explain in more detail, voltage dividing resistor 1
A series circuit consisting of a current limiting resistor 17, a light emitting diode 18 for display, and a transistor 19 for switching is connected in parallel with the series circuit of 5 and 16, and both ends of the voltage dividing resistor 16 are connected to a lambda diode 20 and a base resistor 21. Transistor 1 through series circuit
A parallel circuit consisting of a leakage current compensation resistor 22 and a normally closed reset switch 23 is connected in parallel with the series circuit between the base resistor 21 and the base and emitter of the transistor 19. , and both ends of a series circuit of resistors 15 and 16 are connected to the output end of the charging circuit. Note that the lambda diode 20 used in the above embodiment has the voltage-current characteristics shown in FIG.
As shown in Figure 3, the series circuit of the resistor Re and the resistor Re enters the current blocking state at the voltage V ₁ (high operating point), and the voltage
It has a hysteresis characteristic where current conduction occurs at V ₀ (low operating point).

In the emergency lights configured in this way, during general use, when the commercial power is on, the regular lighting lights operate and the fluorescent lamp 1 lights up, and when the commercial power is turned on, the regular lighting lights stop operating and the emergency lights are switched on. In the main circuit, contact 12 of power failure detection relay 11 closes, contact 1
3 and 14 are switched, the fluorescent lamp 1 is turned on by the high frequency inverter 10, and emergency illumination is provided.
When checking the function of the storage battery 9, use the time shown in Figure 4.
At t ₀ , a commercial power outage is artificially caused in the circuit by, for example, opening the inspection switch 4. When a commercial power outage occurs, the high-frequency inverter 10 is connected to the storage battery 9 through the contacts 12, and as the storage battery 9 discharges, the voltage V _B at both ends decreases, and the low operating point voltage V ₀ of the lambda diode 20 decreases. As shown in FIG. 4, the divided voltage V ₁₆ across the resistor 16, which was at a higher voltage than that, also decreases. Then, for a certain period of time, for example
Even after 20 minutes, the divided voltage V ₁₆ remains low operating point voltage V ₀
, the storage battery 9 has a normal capacity, and in that case, the lambda diode 20 maintains a current blocking state, the transistor 19 is non-conducting, no current flows to the light emitting diode 18, and the display is not displayed. Not done. Next, within a certain time t ₂ , for example at time t ₁ as shown in FIG. 4, the divided voltage V ₁₆
becomes lower than the low operating point voltage V ₀ , the storage battery 9
does not have normal capacity, and in that case, the lambda diode 20 in the current blocking state
transitions to a current conducting state, a base current is supplied to the transistor 19, the transistor 19 becomes conductive, current flows to the light emitting diode 18, the light emitting diode 18 emits light, and the voltage of the storage battery 9 reaches a predetermined level within time _t2 . It will be displayed that the voltage has dropped below. Then, at time _t2 , the artificial commercial power outage is lifted, the storage battery 9 is charged through the charging circuit and reaches the required voltage, and the divided voltage _V16 also becomes the high operating point voltage V with respect to the required voltage. reaches a voltage lower than ₁ ,
maintain its size. In other words, once the lambda diode 20 becomes lower than the low operating point voltage V ₀ and enters the current blocking state, the applied voltage becomes the high operating point voltage.
Since the voltage does not exceed V ₁ , there is no current blocking state, and the light emitting diode 18 maintains the light emission by maintaining conduction of the transistor 19, and the state of the storage battery 9 is checked after a certain period of time for battery inspection. It will be displayed as it is stored. After confirming the display, the reset switch 23 is momentarily closed to substantially short-circuit the resistor 21 in series with the lambda diode 20, thereby returning the lambda diode 20 to the current blocking state, making the transistor 19 non-conductive, and turning off the light emitting diode. 18 can be canceled.

In this way, the emergency light that forms the basis of this invention uses a hysteresis circuit in the battery checker for detecting the voltage of the storage battery, and activates the display at a low operating point voltage and deactivates the display at a high operating point voltage. This has the effect of making it possible to memorize and display the results even after the inspection is completed, making it easy to confirm the inspection results. However, even if the storage battery is normal,
In the event of an inverter failure or a fluorescent lamp reaching the end of its lifespan, it could not be detected even though there was no normal emergency lighting, which was inconvenient.

[Purpose of the invention]

An object of the present invention is to add a function to check whether not only the storage battery but also the load portion of the storage battery is normal.

[Disclosure of the invention]

The emergency light checker of this invention connects a high-frequency inverter to both ends of a storage battery through contacts that close in an emergency, turns on the fluorescent light through a high-frequency current-limiting impedance, and forcibly performs the same function as in an emergency. In an emergency light checker used for emergency lights that is equipped with a means for generating the state of At the same time, at least two of the storage battery voltage detection circuit, the voltage detection circuit corresponding to the fluorescent lamp tube current, and the voltage detection circuit corresponding to the fluorescent lamp luminous flux are selected for the lowest voltage input. A battery checker, an inverter checker, and a fluorescent lamp checker are selectively formed by connecting to the input end of the inspection detection and display circuit through an output circuit.

According to the configuration of the present invention, a switching circuit having a hysteresis characteristic is used as the inspection detection display circuit, and the display is configured to operate at a low operating point voltage of the hysteresis characteristic and reset at a high operating point voltage. At least two of the voltage detection circuit, the voltage detection circuit corresponding to the fluorescent lamp tube current, and the voltage detection circuit corresponding to the fluorescent lamp luminous flux are connected to the input terminal of the inspection detection display circuit through the lowest voltage input selection output circuit. Since the battery checker, inverter checker, and fluorescent light checker are connected and selected, inspections caused by artificial power outages for a certain period of time can check not only the capacity of the storage battery, but also defects and failures in the high frequency inverter, lifespan of the fluorescent lamp, and luminous flux. Deterioration, etc. can be detected and this can be stored and displayed even after the inspection is completed, making it easy to confirm the inspection results.

Embodiment FIG. 5 shows an embodiment of the present invention. In the circuit shown in FIG. 1, a voltage corresponding to the fluorescent lamp tube current is applied across the high frequency current limiting impedance 24 such as a capacitor of the high frequency inverter 10. A voltage detection circuit for detection is provided, and the output voltage of this voltage detection circuit is inputted to the inspection detection display circuit Vb via the lowest voltage input selection output circuit together with the output voltage of the storage battery voltage detection circuit Va. In this case, the lowest voltage input selection output circuit selectively inputs the output voltage of the storage battery voltage detection circuit Va or the output voltage of the voltage detection circuit, whichever is lower, to the inspection detection display circuit Vb.

Specifically, the voltage detection circuit connects a primary winding 26 of a voltage detection transformer 25 to both ends of a high frequency current limiting impedance 24, and a secondary winding 26 of a voltage detection transformer 25.
7 is provided with a rectifier 28, and a resistor 29, a capacitor 30, and a resistor 42 for discharging the capacitor 30 are connected to the DC end of the rectifier 28.

The lowest voltage input selection output circuit is diode 3
1. An inspection detection display circuit consisting of the normally closed contact 41 of the power failure detection relay 11 and formed by the lambda diode 20 of the battery checker, etc.
Connected to Vb force end.

This circuit consists of a battery checker and an inverter checker. Note that the voltage detection circuit is set so that its output voltage is V ₀ in accordance with the tube current when the fluorescent lamp 1 emits a brightness necessary for emergency lighting.

Here, the operations of the voltage detection circuit and the lowest voltage input selection output circuit will be explained in detail. At the time of a power outage, the contact 41 of the power outage detection relay 11 is closed, and the voltage detection circuit is connected in parallel to the voltage dividing resistor 16 of the storage battery voltage detection circuit Va of the battery checker. If the fluorescent lamp 1 is on, the voltage V ₃₀ across the capacitor 30 is sufficiently high, so the diode 31 is reverse biased, the voltage detection circuit is disconnected, and the inspection detection display circuit is activated. Vb operates at an operating point determined by the voltage division ratio of resistors 15 and 16, and when the voltage of storage battery 9 is low, light emitting diode 18 performs display. On the other hand, when the fluorescent lamp 1 is not lit, no voltage is generated in the secondary winding 27 of the transformer 25, so the diode 31
becomes conductive, and resistor 42 is connected in parallel with resistor 16.
(and the parallel circuit of the capacitor 30) is connected, and the voltage across the resistor 16 becomes a low value below the low operating point voltage _V0 , and the light emitting diode 1
8 performs display.

As a result of this configuration, the input terminal of the battery checker receives the battery voltage V ₉ of the storage battery 9,
When the lower of the output voltages V ₃₀ corresponding to the voltages across the high frequency current limiting impedance 24 proportional to the tube current of the fluorescent lamp 1 is applied from the voltage detection circuit, and the capacity of the storage battery 9 becomes abnormally small. In addition, failure of the high frequency inverter 10 or failure of the fluorescent lamp 1
If the tube current of the fluorescent lamp 1 becomes abnormally small due to the lifespan of the fluorescent lamp 1, and the output voltage _V30 of the voltage detection circuit becomes less than _V0 , it is detected, and not only the storage battery 9 but also the high frequency inverter 10 is checked for abnormalities. Ru.

FIG. 6 shows a different embodiment according to the present invention, in which a battery checker inspection detection display circuit Vb is connected to a power source battery 32 and transistors 33, 34.
and a voltage detection circuit consisting of a series circuit of a photoelectric resistor 35 and a resistor 36 that operate in response to the light of the fluorescent lamp 1, and a lowest voltage input selection output circuit, Each voltage detection circuit Va, , is connected to the input terminal of a Schmitt circuit via diodes 38, 39, 40 of the lowest voltage input selection output circuit. Not only the tube current of the inverter 10 decreases, but also the luminous flux of the fluorescent lamp 1 decreases, causing the photoelectric resistance 3 to decrease.
It also operates when the resistance value of 5 increases and the voltage applied from the voltage dividing resistor 36 to the Schmitts circuit becomes low, and even if the storage battery voltage and tube current are sufficient, the fluorescent lamp 1 will not receive the desired luminous flux. It also detects cases where it cannot be obtained and displays the light emitted from the light emitting diode 18.
More precise inspection can be performed.

Diodes 38, 39, and 40 constituting the lowest voltage input selection output circuit are connected to each voltage detection circuit Va,
, are applied to the cathode side, and the voltage of the capacitor 43 connected to the anode side is determined by whichever is smaller among the output voltages of the voltage detection circuits Va, .

In the Schmidt circuit constituting the inspection detection display circuit Vb, the voltage of the capacitor 43 is the low operating point voltage V ₀
When the voltage of the capacitor 43 becomes higher than the high operating point voltage _V1 , the transistor 33 switches from on to off, and the transistor 34 switches from off to on. In addition, the transistor is switched from on to off, and before inspection, the transistor 33 is on and the transistor 34 is off, and when the voltage of the capacitor 43 falls below the low operating point voltage _V0 , the transistor 33 turns off. The light emitting diode 18 turns off and the transistor 34 turns on instead, causing the light emitting diode 18 to perform display.

The Schmitt circuit is returned to its pre-inspection state by lowering the base voltage of the transistor 34 by, for example, turning on the switch 44.

In the embodiment, a light emitting diode was used for display, but it goes without saying that other display elements may be used as long as they have an excellent display effect and can provide sufficient brightness with a relatively small amount of current.

〔Effect of the invention〕

According to the emergency light checker of the present invention, a switching circuit having hysteresis characteristics is used as the inspection detection display circuit, and the display is configured to operate at a low operating point voltage of the hysteresis characteristic and return at a high operating point voltage. At the same time, at least two of the storage battery voltage detection circuit, the voltage detection circuit corresponding to the fluorescent lamp tube current, and the voltage detection circuit corresponding to the fluorescent lamp luminous flux are connected to the inspection detection display circuit through the lowest voltage input selection output circuit. Since a battery checker, an inverter checker, and a fluorescent light checker are connected to the input terminal and selectively formed, inspections caused by artificial power outages for a certain period of time can check not only the capacity of the storage battery, but also high-frequency inverter defects, failures, and fluorescent light checkers. It is possible to detect lifespan, decrease in luminous flux, etc., and store and display it even after the inspection is completed, making it easy to confirm the inspection results.

[Brief explanation of the drawing]

Figure 1 is a circuit diagram of an emergency light including a battery checker that is the basis of this invention, Figure 2 is a voltage-current characteristic diagram of a lambda diode, Figure 3 is a characteristic diagram of a hysteresis circuit using a lambda diode, and Figure 4 is a diagram of a hysteresis circuit using a lambda diode.
This figure is an explanatory diagram of the operation of the circuit of FIG. 1, and FIGS. 5 and 6 are circuit diagrams of an embodiment according to the present invention, respectively. ...Emergency lighting, ...Emergency light main circuit, V
... Battery checker, Va ... Storage battery voltage detection circuit, Vb ... Inspection detection display circuit, ... Voltage detection circuit, ... Voltage detection circuit, 9 ... Storage battery, 10 ... High frequency inverter, 15, 16 ...
Voltage dividing resistor, 18... Light emitting diode, 19...
Transistor, 20...Lambda diode, 24
... Current limiting impedance for high frequency, 27 ... Secondary winding, 28 ... Rectifier, 30 ... Smoothing capacitor, 35 ... Photoresistor, 38, 39, 40 ... Diode.

Claims (1)

[Claims] 1 A high-frequency inverter is connected to both ends of the storage battery through contacts that close in an emergency, and a means is provided to turn on a fluorescent lamp through a high-frequency current-limiting impedance and forcibly generate a state equivalent to an emergency. In the emergency light checker used for emergency lights, a switching circuit with hysteresis characteristics is used as the inspection detection display circuit, and the display is activated at a low operating point voltage of the hysteresis characteristic, and deactivated at a high operating point voltage. At least two of the storage battery voltage detection circuit, the voltage detection circuit corresponding to the fluorescent lamp tube current, and the voltage detection circuit corresponding to the fluorescent lamp luminous flux are connected to the inspection detection circuit through the lowest voltage input selection output circuit. Connect to the input end of the display circuit,
This emergency light checker is characterized by selectively forming a battery checker, an inverter checker, and a fluorescent light checker.