JP2001086661A - Energy-saving interphone - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress wasteful power by connecting a commercial AC power source to a charging power circuit, when potential lowering of a power circuit is detected, and cutting the charging power circuit off from the commercial AC power source when restoration of the potential is detected. SOLUTION: The power circuit 10 of a parent apparatus 2 is charged by direct current beforehand for using it as an operating power source, when the apparatus is in a state of standing-by for a call from an entrance child apparatus 1, or in an operating state, and a DC voltage is fed to a main circuit 11 and a detector 12. The detector 12 monitors a state of power feeding to the main circuit 11, and detects a charged quantity of the power circuit. If the potential of the power circuit 10 to be detected by the detector 12 is a specified threshold level or higher, caused by the matter that consumption of DC current fed from the power circuit 10 is small, like the parent apparatus 2 in a standby state in which operation of the main circuit 11 is unnecessary, a switch 13 is opened by the control of the detector 12, and a power feeding line from a commercial AC power source 3 to a charging power circuit 14 is cut off. Consequently, generation of reactive power is prevented, and wasteful power is suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an energy-saving intercom apparatus, and more particularly, to an energy-saving intercom apparatus in which a base unit having a function of communicating with a front-end unit suppresses useless power consumed in a standby state.

[0002]

2. Description of the Related Art As shown in a block diagram of FIG. 2, a conventional intercom apparatus has an entrance terminal 51 installed at the entrance of a dwelling unit.
And a main unit 52 having a call detection function for detecting a call from the entrance cordless handset 51 in the dwelling unit and establishing a call, a call function, and the like, and a commercial AC power supply 53.

A main unit 52 includes a main power supply circuit 60 including a power supply transformer for rectifying (AC / DC conversion) an AC voltage from a commercial AC power supply 53 and a DC voltage rectified through the main power supply circuit 60. A call detection circuit for detecting a call from the entrance device 51 as an operation power supply, a power supply (sub device power) supply circuit for supplying a DC voltage to the called entrance device, and a communication circuit for establishing a call with the entrance device. And a main circuit 61 having a large power consumption.

In the intercom apparatus configured as described above, the AC voltage from the commercial AC power
The main circuit 61 is always supplied with power (power supply) as a rectified DC voltage via the main power supply circuit 60.

[0005]

However, since the conventional intercom apparatus is configured as described above,
In a standby state in which the base unit 52 waits for a call from the entrance slave unit 51, there is a problem that wasteful power is consumed due to power supply to the main circuit 61 which is not required to operate.
For example, in such an intercom apparatus, if one base unit and two additional base units are installed in one dwelling unit, and a call that takes about 30 seconds per call and a call occurs on average about 20 times a day, , 6 to 9 W of wasteful power is constantly consumed at a high rate of 99.3% in 24 hours a day.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned disadvantages, and it is intended to cut off (interrupt) power supply from a commercial AC power supply to a parent unit in a standby state for waiting for a call from an entrance slave unit. An object of the present invention is to provide an energy-saving intercom apparatus in which useless power consumed in a standby state is suppressed.

[0007]

In order to achieve the above object, an energy-saving intercom apparatus according to the present invention comprises a power storage circuit capable of operating a base unit and an entrance unit capable of communicating with the base unit; Detection circuit that detects the potential of a simple power supply circuit, a charging power supply circuit that charges a storable DC power obtained by rectifying a commercial AC power supply, and a detection circuit that detects a drop in the potential of the storable power supply circuit. And a switch for disconnecting the charging power supply circuit from the commercial AC power supply when the recovery of the potential of the power supply circuit capable of storing power is detected.

In the energy-saving intercom apparatus configured as described above, the operation power supply of the base unit in the standby state for waiting for a call from the entrance unit and the operation state for detecting the call from the entrance unit and establishing a call is established. Uses a DC voltage stored in advance in a power supply circuit capable of storing power. When the potential of the power supply circuit capable of storing electricity drops due to the operation of the master unit, the detection circuit controls the detection and the switch is closed, and the DC power corresponding to the potential drop from the charging power supply circuit connected to the commercial AC power supply. The voltage is charged in the power supply circuit capable of storing the voltage. When the potential of the power supply circuit that can store electricity is restored by charging from the charging power supply circuit, a switch is opened under the control of the detection circuit that detects this, and the connection between the commercial AC power supply and the charging power supply circuit is disconnected (cut off). Is done.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment to which the energy-saving intercom apparatus according to the present invention is applied will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of an energy-saving intercom apparatus according to the present invention, and shows an entrance unit 1 installed in a dwelling unit and a call from the entrance unit 1 installed in a dwelling unit. A base unit 2 having a call detection function for detecting and establishing a call, a call function, etc .;
It is composed of

The base unit 2 has a power storage circuit 10 composed of a secondary battery, a supercapacity or the like in which a DC voltage is stored in advance, and a DC voltage supplied from the power storage circuit 10 as an operation power supply. It comprises a call detection circuit for detecting a call from the entrance terminal 1, a power supply (sub-unit power supply) supply circuit for supplying a DC voltage to the called entrance terminal, and a communication circuit for establishing a call with the entrance terminal. A main circuit 11 that consumes a large amount of power, a detection circuit 12 that monitors the potential of the power supply circuit 10 that can store power, that is, a power supply state to the main circuit 11, and detects the amount of power (power supply capacity) of the power supply circuit that can store power; The commercial AC power supply 3 is closed by the control of the detection circuit 12 that detects a decrease in the potential of the power supply circuit 10 capable of storing electric power, that is, a shortage of electric power storage.
And a switch 13 forming a power supply line between a charging power supply circuit 14 and a DC voltage corresponding to the potential drop detected by the detection circuit 12 and an AC voltage from the commercial AC power supply 3 (AC / DC conversion). And a charging power supply circuit 14 including a power supply transformer for charging the power supply circuit 10 capable of storing power from the DC voltage.

A power supply output section of a charging power supply circuit 14 is connected to a power supply input section of a storable power supply circuit 10 whose power supply output section is connected to each power supply input section of a main circuit 11 and a detection circuit 12. A switch 13 is provided at a power input portion of the power circuit 14.
The commercial AC power supply 3 is connected via normally open contacts and switching contacts. The control input of the switch 13 is connected to the control output of the detection circuit 12. Furthermore, the main circuit 1
1 is connected to the entrance slave unit 1 by an appropriate means.

The operation of the thus configured energy-saving intercom apparatus will be described below.

The power supply circuit 10 capable of storing electricity in the base unit 2 has a standby state in which the base unit waits for a call from the entrance unit 1 and an operation state in which a call from the entrance unit is detected and a call is established. A DC voltage is stored in advance as an operation power supply for the main circuit 11, and the DC voltage is supplied to the main circuit 11 and the detection circuit 12, respectively. The detection circuit 12 monitors the potential of the power supply circuit 10 capable of storing power, that is, the state of power supply to the main circuit 11, from the supplied DC voltage, and detects the amount of power storage (power supply capacity) of the power supply circuit capable of storing power.

Here, the consumption (power consumption) of the DC voltage supplied from the power supply circuit 10 capable of storing power is small, as in the parent device 2 in the standby state where the operation of the main circuit 11 is unnecessary. When the potential of the power supply circuit 10 that can be stored and detected by the detection circuit 12 is equal to or higher than a predetermined threshold level, the switch 13 is opened by the control of the detection circuit 12, and the switch between the commercial AC power supply 3 and the charging power supply circuit 14 is performed. Is cut off (cut off). As a result, generation of reactive power in the charging power supply circuit 14 including a power transformer and the like is prevented, and wasteful power consumed in the standby state can be suppressed.

Next, power is supplied from a power supply circuit 10 capable of storing electricity, such as the main unit 2 in an operation state in which an operation of the main circuit 11 for detecting a call from the entrance slave unit 1 and establishing a call is required. When the potential of the storable power supply circuit 10 detected by the detection circuit 12 falls below a predetermined threshold level due to a large DC voltage consumption (power consumption), the switch 13 is closed by the control of the detection circuit 12. Thus, a power supply line between the commercial AC power supply 3 and the charging power supply circuit 14 is formed. The charging power supply circuit 14 charges the storable power supply circuit 10 as a rectified DC voltage from the AC voltage from the commercial AC power supply 3 via the above-described power supply line. When the potential of the chargeable power supply circuit 10 is restored by charging from the charging power supply circuit 14 and the potential of the chargeable power supply circuit detected by the detection circuit 12 becomes equal to or higher than a predetermined threshold level, the control of the detection circuit 12 is performed. As a result, the switch 13 is opened, and the power supply line between the commercial AC power supply 3 and the charging power supply circuit 14 is disconnected (cut off). As a result, generation of reactive power in the charging power supply circuit 14 including a power transformer and the like is prevented, and wasteful power consumed not only in the standby state but also in the operation state can be suppressed.

[0017]

As is apparent from the above description, according to the energy-saving intercom apparatus of the present invention, a call is established by detecting a call from the handset and a standby state for waiting for a call from the handset. A DC voltage stored in advance in a storable power supply circuit including a secondary battery, supercapacity, and the like is used as an operation power supply of the master unit in an operation state. When the potential of the power supply circuit capable of storing electricity drops due to the operation of the master unit, the switch is closed by the control of the detection circuit that detects this, and the potential drop from the charging power supply circuit connected to the commercial AC power supply is detected. Is charged in the power supply circuit capable of storing power. Thereby, useless power consumed in the standby state can be suppressed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of an energy-saving intercom apparatus according to the present invention.

FIG. 2 is a block diagram showing a configuration of a conventional intercom apparatus.

[Explanation of symbols]

 1 ·········································································································································································· 13 · Switch 14 · · · · Power supply circuit for charging

Claims (1)

[Claims] A power supply circuit capable of storing electricity for operating a base unit (2) and an entrance unit (1) capable of communicating with the base unit.
A detection circuit (12) for detecting the potential of the power supply circuit capable of storing electricity; and a charging power supply circuit (1) for charging the power supply capable of storing electricity with a DC obtained by rectifying a commercial AC power supply (3).
4) connecting the commercial AC power supply to the charging power supply circuit when the detection circuit detects a decrease in the potential of the chargeable power supply circuit, and detecting recovery of the potential of the chargeable power supply circuit; And a switch (13) for disconnecting the charging power supply circuit from the commercial AC power supply.