JP3012938U - Outlet fever alarm - Google Patents

Abstract

(57) [Summary] [Construction] An outlet 1 in which a commercial power source is connected to the conductors 2 and 3 on the other side, a temperature sensor 6 built in the outlet for detecting the temperature of the outlet, and provided on one conductor of the outlet Circuit power supply transformer 4, diode bridge 5 for rectifying commercial power input to the circuit power supply transformer, and power supply + B from the diode bridge, and alarm circuit for issuing an alarm when the temperature sensor operates It has an LED and Bz. [Effect] When the heat generated by the contact resistance between the outlet and the plug becomes high temperature, the alarm can be surely issued.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outlet heat alarm device, and more particularly to an outlet heat alarm device that detects heat generation due to contact resistance between a plug inserted in a wall wall outlet and a wall outlet and issues an alarm.

[0002]

[Prior art]

 Conventionally, indoor electrical wiring is connected to multiple outlets on the wall surface via a switchboard, and if necessary, a plug to which electrical equipment that is a load is connected is inserted into this outlet. It is designed to supply power to equipment. Since there is some contact resistance between the outlet and the plug, there is some heat generation, but in most cases, if the current supplied to the load is steady, no fire will occur due to heat generation.

[0003]

[Problems to be solved by the device]

 However, some electric devices require a minute current of about several mA for the built-in clock, so heat generated by the contact resistance between the outlet and the plug warms up the metal fittings inside the plug, and the outside of the plug. There is a problem that the material such as plastic is burned out and combustible materials in the surrounding area are burnt.

[0004]

[The purpose of the device]

 The present invention has been made to solve the above-mentioned drawbacks, and an object thereof is to provide an outlet heat alarm that can issue an alarm when the heat generated by the contact resistance between the outlet and the plug becomes high temperature. And

[0005]

[Means for Solving the Problems]

 In order to achieve this purpose, the outlet heat alarm according to the present invention comprises an outlet in which a commercial power source is connected to one and the other conductor, a temperature sensor built in the outlet to detect the temperature of the outlet, and one of the outlets. The power supply is supplied from the transformer for circuit power provided on the conductor, the diode bridge that rectifies the commercial power input to the transformer for circuit power, and the diode bridge, and an alarm is issued when the temperature sensor operates. And a circuit for use.

[0006]

[Action]

 The temperature sensor operates when the temperature around the outlet becomes high. When the temperature sensor operates, the alarm circuit issues an alarm. The operating power of the alarm circuit is obtained by rectifying the commercial power supplied from the circuit power transformer provided on one conductor of the outlet by a diode bridge.

[0007]

【Example】

 Hereinafter, an embodiment of an outlet heat alarm according to the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, an outlet heat alarm device according to the present invention comprises an outlet 1 in which a commercial power source is connected to the conductors 2 and 3 on the other side, and a temperature sensor 6 which is built in the outlet and detects the temperature of the concentrator. , A power supply transformer 4 provided on one conductor of the outlet, a diode bridge 5 for rectifying the commercial power input to the circuit power supply transformer, and a power supply + B from the diode bridge to supply the temperature sensor. Is provided with an alarm circuit LED and Bz for issuing an alarm.

A circuit power supply transformer 4 is fitted to the blade tip 2b shown in FIG. 3 of one conductor 2 of the outlet. Both ends of this circuit power supply transformer 4 are connected to one and the other input sides of the diode bridge 5 via circuit power supply transformer pins P ₁ and P _{2, respectively,} and are connected to the circuit power supply transformer pins P ₁ and P ₂ . A load resistor R ₁₁ of the circuit power supply transformer 4 is connected between them. A smoothing capacitor C ₁ is connected to both ends of the output side of the diode bridge 5, and a reference potential point is connected to the other output side, and one output side supplies a power source + B to each circuit. ing.

[0009] The other end of the connected resistor R ₃ on one end is a reference potential point is connected to the resistor R _2, R ₁ pin P ₃ temperature sensor via a connection point of the resistors R ₂ and R ₁ is The temperature sensor pin P ₄ is connected. Between the resistor R ₃ and the resistor connecting point of R ₂ and operational amplifier OP ₁ (+) input side is connected to resistor R _7, the (+) input of the operational amplifier OP ₁ is connected to a reference potential point is at one end The other end of the resistor R ₈ is connected.

The other end of the resistor R ₅ whose one end is connected to the reference potential point is connected to the temperature sensor pin P ₃ via the resistor R ₄ and the temperature adjusting volume VR ₁ , and the resistor R ₅ and the resistor R ₅ are connected. _A resistor R ₆ is connected between the connection point of ₄ and the (−) input side of the operational amplifier OP ₁ . The output side of the operational amplifier OP ₁ is connected to the base of the alarm transistor Q ₁ via the resistor R _9, and the emitter of the alarm transistor Q ₁ is connected to the reference potential point.

The collector of the alarm transistor Q ₁ is connected to the power source + B via the cathode and anode of the alarm light emitting diode LED. The collector of the alarm transistor Q ₁ is connected to the power supply + B via the alarm buzzer Bz, and the power supply + B is connected to the reference potential point via the cathode and the anode of the Zener diode ZD via the resistor R _10. There is.

The cathode of the Zener diode ZD is connected to the temperature sensor pin P ₃ . As shown in FIG. 2A, blade receptacles 3b and 2b are provided on the back surface of the outlet 1. One conductor 2 on the back surface is fixed to the outlet 1 with a screw 9, and a blade provided at the tip of the conductor 2. As shown in FIG. 3, the above-mentioned circuit power supply transformer 4 is mounted on the receiver 2b, and the temperature sensor 6 is mounted at an appropriate position of the outlet 1.

On the surface of the outlet 1 shown in FIG. 2C, a light emitting diode LED for warning and a warning buzzer Bz are mounted on a circuit component mounting plate 10 shown in FIG. Part of the conductors 2 and 3 fixed to the outlet 1 with screws 9 form blade receivers 2a and 3b. In such an outlet heat alarm device, when the temperature sensor 6 shown in FIG. 1 detects a high temperature around the container 1, an abnormal temperature signal f ₁ indicating an abnormal temperature is sent to the temperature sensor pins P ₃ and P ₄ . To do.

When the abnormal temperature signal f ₁ is sent to the temperature sensor pins P ₃ and P ₄ , the (+) input side of the operational amplifier OP ₁ which functions as an inverting amplifier becomes H level, and the output of the operational amplifier OP ₁ is output. The side becomes H level. When the output side of the operational amplifier OP ₁ becomes H level, the alarm transistor Q ₁ is turned on, the alarm light emitting diode LED emits light, and the alarm buzzer Bz sounds.

The temperature adjusting volume VR ₁ finely adjusts the potential on the (−) input side of the operational amplifier OP ₁ to ensure the operating range of the temperature sensor 6. The Zener diode ZD is provided to stabilize the voltage of each part.

[0016]

[Effect of device]

 As is apparent from the above description, according to the outlet heat alarm of the present invention, an outlet having a commercial power source connected to one and the other conductor, a temperature sensor built in the outlet for detecting the temperature of the outlet, An alarm is issued when the temperature sensor operates, with the circuit power transformer provided on one conductor of the outlet, the diode bridge that rectifies the commercial power input to the circuit power transformer, and the power supplied from the diode bridge. Since it is equipped with an alarm circuit that activates, an alarm can be reliably issued when the heat generated by the contact resistance between the outlet and the plug becomes high temperature.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of an outlet fever alarm according to the present invention.

FIG. 2A is a rear view of the outlet of the present invention.
(B) is a side view of the outlet. (C) is a front view of the outlet.

FIG. 3 is a partially cutaway rear view of the outlet of the present invention.

FIG. 4 is a partially cutaway front view of an outlet according to the present invention.

[Explanation of symbols]

 1-Outlet 2-One conductor 3-Other conductor 4-Circuit power transformer 5-Diode bridge LED-・ ・ ・ ・ ・ Alarm light emitting diode (alarm circuit) Bz ・ ・ ・ ・ ・ Alarm buzzer (alarm circuit) ＋ B ・ ・ ・ ・ ・ ・ Power supply

Claims (1)

[Scope of utility model registration request] 1. An outlet (1) having a commercial power source connected to one and the other conductor (2, 3), a temperature sensor (6) built in the outlet for detecting the temperature of the outlet, and an outlet for the outlet. A circuit power supply transformer (4) provided on one conductor, a diode bridge (5) for rectifying the commercial power supply input to the circuit power supply transformer, and a power supply (+ B) supplied from the diode bridge, An outlet heat generation alarm device comprising an alarm circuit (LED, Bz) for issuing an alarm when the temperature sensor operates.