JP2006246666A - Air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To discharge residual voltage in a short time, when disconnected from an outlet. <P>SOLUTION: An alternating-current power supply 7 from the outlet 4 is connected to a rectifying element 9, that is connected with a noise filter 8 and a capacitor 1 and generates control voltage. To discharge residual voltage between the different poles of the outlet for prevention of electric shocks, a discharging resistor 2 and a detection circuit 3 that detects the interruption of alternating-current voltage are connected. To suppress power consumption at a stop, the value of the discharging resistor 2 is increased. A switch 13 that is connected when service interruption is detected, a resistance element 14 are connected in parallel between the different poles of alternating current, and the voltage stored in the capacitor 1 is thereby lowered in a short time. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an air conditioner that discharges a voltage accumulated in a primary capacitor when an outlet is pulled out from an AC power plug.

  Conventionally, this type of air conditioner has a discharge resistor 2 and a power failure detection device 3 between alternating current poles for the purpose of detecting residual voltage discharge and power failure when the outlet is pulled out for safety purposes. Are connected (for example, refer to Patent Document 1).

FIG. 3 shows a conventional electronic control device for an air conditioner described in Patent Document 1. As shown in FIG. As shown in FIG. 3, the discharge resistor 1, the instantaneous power failure detection device 2, and the capacitor 3 are included.
Japanese Utility Model Publication No. 4-21189

  However, in the conventional configuration, in order to reduce power consumption when the air conditioner is stopped, the discharge resistance 2 between the alternating current and the AC pole is becoming high resistance, and when the outlet 4 is pulled out, the capacitor 1 There has been a problem that the discharge time of the accumulated voltage becomes long.

  The present invention solves the above-described conventional problems, and an object thereof is to provide an air conditioner that discharges the outlet voltage in a short time without increasing the power consumption of the primary side input.

  In order to solve the above-described conventional problems, the air conditioner of the present invention is intended to form a new discharge path between AC different polarities when the AC input power from the outlet 4 is cut off.

  Thereby, the discharge time when the input from the outlet is cut off can be shortened.

  The air conditioner of this invention can shorten discharge time at the time of interruption | blocking of an outlet, without enlarging the power consumption between alternating current different poles.

  The first invention detects the outlet being pulled out, operates a switch between alternating current poles connected in parallel with the discharge resistor, and further forms a discharge path, thereby forming a residual voltage of the outlet. Can be drastically reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a block diagram of a power supply unit of an electronic control device for an air conditioner according to Embodiment 1 of the present invention. FIG. 2 shows operation waveforms of the AC power source 1 and the DC power source 2 to the control unit.

The outlet 4 is connected to an electronic controller of the air conditioner 6 by a connector 5 and is input as an AC power source 7. The AC power supply 7 is connected to the noise removal filter 8 and the capacitor 1, and further supplied as the power supply 12 of the control unit 11 through the rectifying element 9 and the capacitor 10. Further, a discharge resistor 2 and a power failure detection element 3 are connected in series between different polarities of the AC power supply, and an AC voltage is constantly detected to send a signal to the control unit 11. Further, a switch 13 and a resistance element 14 having a resistance value lower than that of the discharge resistor 2 are connected in parallel with the discharge resistor 2 and the power failure detection element 3 between different polarities of the AC power source, and the power failure detection element 3 is connected to the AC voltage. When the control unit 11 detects that the AC voltage has stopped, the control unit 11 continues to operate the control unit 11 for a longer time than the AC voltage 7 due to the DC voltage 12 stored in the capacitor 10, and the input of the AC voltage 7 is stopped. However, the switch 13 is operated without stopping immediately, and the voltage between the alternating current and the negative electrode is reduced in a short time. Furthermore, since the switch 13 is connected to the resistance element 14 that is lower than the discharge resistance 2, the residual voltage between the AC different poles can be reduced more quickly.

  As described above, since the air conditioner according to the present invention can eliminate the outlet residual voltage while suppressing power consumption, it can be widely applied to uses of outlet-using devices.

The block diagram of the electronic controller of the air conditioner in Embodiment 1 of this invention Operation waveform diagram of electronic control device of air conditioner in Embodiment 2 of the present invention Conventional air conditioner electronic controller block diagram Operation waveform diagram of conventional electronic control unit of air conditioner

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Capacitor 2 Discharge resistance 3 Power failure detection element 4 Outlet 5 Connector 6 Electronic control unit 7 AC power supply 8 Noise filter 9 Rectifier 10 Capacitor 11 Control part 12 DC voltage 13 Switch 14 Resistance element

Claims (1)

In the electronic control device for an air conditioner, a discharge resistor and a power failure detection element for detecting that the AC power supply is supplied are connected in series between different polarities of the AC input power source, and the resistor is connected in parallel with these elements. An air conditioner comprising: a resistance element having a resistance lower than that of the element; and a switch that is turned on / off by a control unit that operates in response to a detection signal from the detection element.

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