TWI649952B - Home appliance machine - Google Patents

Abstract

The home appliance 100 includes a power circuit section 15, a power detection section 18, an actuator driving section 17, and a power section switch 16. By executing the standby mode in step S102, the power supply section switch 16 is turned off. Then, in the execution of the standby mode, the processing is performed as step S103 → step S105 → step S101, and when the power source detection section 18 detects that no AC power is input, the processing moves to step S110. In this step S110, the power supply unit switch 16 is turned on and the actuator drive unit 17 is operated, whereby the electric charges of the first smoothing capacitor C1 and the second smoothing capacitor C2 can be quickly discharged by the drive circuit 17a.

Description

Home appliances

The invention relates to a household appliance.

Conventionally, for example, as disclosed in Japanese Patent Application Laid-Open No. 2006-246666, an air-conditioning apparatus that discharges a residual voltage in a short time when an outlet is disconnected is known. In this air conditioner, for safety purposes, the residual voltage of the capacitor is discharged when the socket is unplugged. Capacitors are installed between the AC opposite poles, that is, between the ends of the plug. When a power outage is detected, the switch stored in parallel between the AC opposite poles and the switch of the resistance element are short-circuited to discharge the charge stored in this capacitor.

[Leading Patent Literature]

[Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2006-246666

Household appliances such as air conditioners and dehumidifiers include a power circuit, an actuator, an actuator driving section, and a display operation device. The power circuit is connected to a power plug and generates power. Actuators are used to achieve the required functions such as air conditioning and dehumidification. The actuator driving section includes a driving circuit. The display operating device is used to operate and display the machine.

A smoothing capacitor is often included in at least one of the power supply circuit and the drive circuit. When the power plug is unplugged and the supply of AC power is stopped, the smoothing capacitor has a residual charge.

Due to the influence of low power consumption in recent years, even if the power plug is unplugged, a defective period such as continuous input of power to the display operating device due to the residual voltage of the smoothing capacitor may occur. The residual voltage of the smoothing capacitor alone cannot replenish a large amount of power sufficient to drive the actuator during normal operation. During this defective period, although the display operation device is operated, even if an operation is input to the display operation device, the desired actuator operation is not achieved. Especially because the power consumption is suppressed during the execution of the standby mode, this bad problem is easy to become obvious when the power plug is unplugged during the execution of the standby mode. The charge stored in the capacitor connected between the electrodes is discharged. The capacitors connected between the AC different poles have a relatively small capacity, and can be discharged in a small-scale circuit as disclosed in Japanese Patent Application Laid-Open No. 2006-246666. In contrast to this capacitor, the smoothing capacitor provided in the power circuit section or the actuator driving section has a relatively large capacity. The conventional technique leaves room for improvement from the viewpoint of discharging a smooth capacitor having a relatively large capacity.

The present invention was developed by a developer to solve the above-mentioned problems, and an object of the present invention is to provide a home appliance that is improved to rapidly discharge the residual charge of a smoothing capacitor when the power supply of AC power is stopped.

The home appliance according to the first invention of the present patent application includes a power circuit unit that receives AC power and generates internal power; The power source detection section detects whether the AC power is input to the power supply circuit section; the actuator drive section is connected to the actuator and drives the actuator with a drive circuit including a smoothing capacitor; and the power section switch Is between the actuator driving section and the power circuit section, and the internal power generated by the power circuit section is transmitted to the actuator driving section by being turned on; in a predetermined standby mode start condition When it is established, a standby mode is executed to make the power supply part switch to be non-conducting to stop the actuator. When the power supply detection part detects that the AC power is not input during execution of the standby mode, The external switch is turned on, and the charge of the smoothing capacitor is discharged by the driving circuit.

The home appliance of the second invention of the present patent application includes a power supply circuit section that receives AC power and generates internal power by a circuit containing a smoothing capacitor; a power detection section that detects whether the AC is input to the power circuit section Electric power; an actuator driving part connected to the actuator and driving the actuator with a driving circuit; and a power supply part switch interposed between the actuator driving part and the power supply circuit part, and by It becomes conductive and transmits the internal power generated by the power supply circuit section to the actuator driving section; when a predetermined standby mode start condition is established, a standby is performed to make the power section switch non-conductive and stop the actuator mode; When the power supply detection section detects that the AC power is not input during the execution of the standby mode, the switch of the power supply section is turned on, and the charge of the smoothing capacitor is discharged by the driving circuit.

According to this first invention, when the power supply of the AC power is stopped, the power supply unit switch is turned on even in the standby mode, and the actuator drive unit can be energized, so the actuator can be quickly consumed. The charge stored in the smoothing capacitor in the driver.

According to the second invention, when the power supply of the AC power is stopped, the power supply section switch is turned on even in the standby mode, so that the electric charge of the smoothing capacitor included in the power supply circuit section can be quickly discharged.

1‧‧‧ central frame

2‧‧‧ front box

Box after 3‧‧‧

4‧‧‧Exhaust

5‧‧‧ blower

6‧‧‧ Dehumidifier

6a‧‧‧compressor

6b‧‧‧Condenser

6c‧‧‧Pressure reduction device

6d‧‧‧Evaporator

7‧‧‧Display operation device

7a‧‧‧Main power switch

8‧‧‧ water tank

9‧‧‧ suction port

10‧‧‧Control device

11‧‧‧Exhaust shutter motor

12‧‧‧ Sensor

13‧‧‧AC Power

15‧‧‧Power circuit department

16‧‧‧Power supply switch

17‧‧‧Actuator drive section

17a‧‧‧Drive circuit

17b‧‧‧Second Microcomputer

18‧‧‧Power Detection Department

19‧‧‧ Power sync detection

20‧‧‧Detection switch

30‧‧‧Interface Control Department

30a‧‧‧The first microcomputer

31‧‧‧Display

32‧‧‧Operation Department

32a‧‧‧operation switch

41‧‧‧Wiring (signal wiring)

42‧‧‧Wiring (power wiring)

43‧‧‧Wiring (control wiring)

44‧‧‧Wiring (communication wiring)

45‧‧‧ wiring (synchronous signal wiring)

50‧‧‧ dedicated hardware

51‧‧‧ processor

52‧‧‧Memory

100‧‧‧Household appliances

101‧‧‧Power Plug

141‧‧‧first resistor

142‧‧‧diode

143‧‧‧Photocoupler

144‧‧‧Second resistor

C1‧‧‧The first smoothing capacitor

C2‧‧‧Second smoothing capacitor

Fig. 1 is a cross-sectional view of a home appliance according to an embodiment of the present invention.

Fig. 2 is an exploded perspective view of a home appliance according to an embodiment of the present invention.

Fig. 3 is a circuit block diagram of a household electrical appliance according to an embodiment of the present invention.

FIG. 4 is a flowchart for explaining the operation of the home appliance according to the embodiment of the present invention.

Fig. 5 is a circuit diagram of a power supply synchronization detection unit of a home appliance according to an embodiment of the present invention.

Fig. 6 is an example of a hardware configuration diagram of the interface control unit.

Fig. 1 is a cross-sectional view of a home appliance according to an embodiment of the present invention. Fig. 2 is an exploded perspective view of a home appliance according to an embodiment of the present invention.

The household electrical appliance 100 according to the embodiment is a dehumidifier, and specifically, a dehumidifier of a movable inverter-driven compressor type. The left side of the paper surface in FIG. 1 is regarded as the “front” of the home appliance 100, and the right side of the paper surface in FIG. 1 is regarded as the “back” of the home appliance 100. The housing system of the home appliance 100 is composed of a central housing 1, a front housing 2, and a rear housing 3. The central housing 1 is provided in a central portion of the home appliance 100. The central frame 1 is self-supporting. The front frame 2 is provided on the front side of the center frame 1 so as to be detachable from the center frame 1. The rear frame body 3 is provided on the rear side of the center frame body 1 so as to be detachable from the center frame body 1.

The discharge port 4 is formed in the upper part of the center frame 1. The blower 5 is installed in the center part of the center frame 1 in the front-back direction of the center frame 1. For example, the blower 5 includes a blower fan and a motor. The rotation axis of the blower 5 is parallel to the front-rear direction axis of the home appliance 100 at the central portion of the center frame 1. The rotating shaft system of the blower 5 is oriented horizontally. The dehumidifier 6 is provided on the rear side of the center frame 1. The dehumidifying device 6 includes a compressor 6a, a condenser 6b, a pressure reducing device 6c, and an evaporator 6d. Although not shown in FIGS. 1 and 2, the sensor 12 for humidity detection (see FIG. 3) is provided on a side surface on one side of the central casing 1 at the lower portion of the central casing 1.

The front frame 2 includes a display operation device 7 and a water storage tank 8. The display operation device 7 is provided on the upper part of the front frame 2. Although not shown in FIGS. 1 and 2, the display operation device 7 includes an operation unit 32 (see FIG. 3) and a display unit 31 (see FIG. 3). The water storage tank 8 is provided in the lower part of the front frame body 2. The water storage tank 8 is in a state where the front frame body 2 is attached to the center frame body 1 and is detachable from the front side of the home appliance 100.

The rear box body 3 includes a suction port 9. The suction port 9 is provided in the upper part of the rear frame body 3.

The home appliance 100 includes a display operation device 7 and a control device 10. The control device 10 is installed in front of the center frame 1. The control device 10 controls the operation of the blower 5 based on the operation state of the operation portion 32 of the display operation device 7 and the humidity detected by the humidity sensor 12. The motor of the blower 5 is rotated at a rotation speed controlled by the control device 10. As a result, the indoor air A is sucked into the casing from the suction port 9 in the horizontal direction. Then, the air A passes through the evaporator 6d. Next, the blower 5 is directed upward from the discharge port 4 and discharges air B into the room.

The control device 10 controls the operation of the compressor 6 a based on the operation state of the operation unit 32 of the display operation device 7 and the humidity detected by the humidity sensor 12. The compressor 6 a compresses the refrigerant at a frequency designated by the control of the control device 10. The condenser 6b is a refrigerant compressed by the cooling compressor 6a. The pressure reducing device 6c depressurizes the refrigerant cooled by the condenser 6b. The evaporator 6d removes moisture contained in the air A by absorbing heat from the refrigerant depressurized by the pressure reducing device 6c. As a result, the dehumidified air B is generated. The moisture removed from the air A is stored in the water storage tank 8.

Fig. 3 is a circuit block diagram of a household electrical appliance according to an embodiment of the present invention. The display operation device 7 includes a main power switch 7 a, a display section 31, an operation section 32, and an interface control section 30. The display unit 31 is composed of an LED, a liquid crystal, or the like. The operation unit 32 may be configured by mechanical switches such as buttons provided around the display unit 31, or may be implemented by configuring at least a part of the display unit 31 with a touch panel. The operation unit 32 includes an operation switch 32a. Interface control section 30 series It is structured around the first microcomputer 30a. The first microcomputer 30a performs display processing of LEDs or liquid crystals, and operation processing of receiving switches and the like.

The control device 10 includes a power circuit section 15, a power section switch 16, an actuator driving section 17, a power detection section 18, a power synchronization detection section 19, and a detection section switch 20. The power supply circuit section 15 includes a first smoothing capacitor C1 that stores electric charges when an internal power source is generated. The actuator driving section 17 includes a driving circuit 17a. The drive circuit 17a includes a second smoothing capacitor C2.

The actuator drive unit 17 is connected to the compressor 6a, the blower 5, and the discharge window shutter drive motor 11, and controls the operations of these elements. The actuator driving section 17 includes a driving circuit 17a for realizing the control, and the driving circuit 17a includes a second microcomputer 17b. The compressor 6a compresses the refrigerant while confirming the condition of the air with the sensor 12 for humidity detection. The discharge port shutter drive motor 11 changes the direction of air supply from the discharge port 4. The power circuit unit 15 is an internal power source that receives power from the AC power source 13 and generates a DC required for control. The power source detection unit 18 detects that the AC power source 13 is reliably supplied with power. When the power plug 101 is unplugged, the power detection unit 18 can detect the unplug. The power synchronization detection unit 19 detects a zero-cross of the AC power source 13.

One purpose of the power synchronization detecting section 19 is to determine the frequency of the input AC power 13. The other purpose of the power supply synchronization detection unit 19 is to apply as a replacement timer by counting the number of zero crossings. The other purpose of the power synchronization detecting unit 19 is to use the zero-crossing point as a base point to measure a predetermined time to the next zero-crossing. This measurement time can be applied to determine the control timing of the actuator, or can be applied to the control of the power supply circuit section 15 as needed.

The home appliance 100 includes a "standby mode". Although the standby mode is Although the power of the home appliance 100 is turned on by the input of the main power switch 7a, the actuators such as the compressor 6a are not driven. The standby mode is executed when the power supply of the home appliance 100 is turned on and the operation switch 32a of the operation unit 32 is not turned on. For example, immediately after the power source of the home appliance 100 is turned on, the period from when the operation switch 32a for turning on the dehumidification is actually turned on is set to the standby mode. For example, when the operation switch 32a is turned on once after the power of the home appliance 100 is turned on, and then the operation switch 32a is turned off, the standby mode is also executed. Alternatively, for example, after the power of the home appliance 100 is turned on and the operation switch 32a is turned on, dehumidification is performed for a predetermined time set by a timer, and the dehumidification is automatically switched to inactive, and the standby mode is executed.

During the execution of the "standby mode", the power supply unit switch 16 is set to be non-conductive, and the actuator drive unit 17 is disabled. As a result, standby power is reduced. Because the power synchronization detection unit 19 needs to detect the zero-crossing point correctly, the power synchronization detection unit 19 is a low-impedance circuit that is hardly affected by disturbance. Therefore, the power consumption of the power supply synchronization detection unit 19 is large. By setting the detection section switch 20 to be non-conductive during the execution of the standby mode, the power supply synchronization detection section 19 is separated from the AC power supply 13. This reduces standby power.

The display operation device 7 and the control device 10 are connected by wirings 41 to 45. The wirings 41 to 45 are more specifically the signal wiring 41, the power wiring 42, the control wiring 43, the communication wiring 44, and the synchronization signal wiring 45.

The signal wiring 41 transmits a detection signal from the control device 10 to the display operation device 7 to output the presence or absence of power supply from the AC power source 13. The signal wiring 41 directly connects the power detection section 18 and the interface control section 30 Connect to ground without sandwiching other circuits.

The signal wiring 41 can transmit a detection signal indicating that AC power is not input to the interface control unit 30 in a very short time. If the power detection unit 18 detects that no AC power is input, it is better to set the interface control unit 30 to a stopped state at a timing much faster than the voltage of the first smoothing capacitor C1 lower than the operating voltage of the interface control unit 30. If the power detection unit 18 detects that no AC power is input, it is better to transmit the detection signal to the interface control unit 30 within a sufficiently short time such as tens of msec. The system within a few tens of msec is specifically 10msec to 90msec, and the system is preferably as short as possible.

The power supply wiring 42 supplies a direct-current power generated by the power supply circuit unit 15 to the display operation device 7. The control wiring 43 transmits an on / off command to the power supply section switch 16 and the detection section switch 20 from the display operation device 7. The communication wiring 44 is a bidirectional wiring for exchanging information between the interface control section 30 and the actuator driving section 17. The communication wiring 44 transmits an actuator operation instruction to the actuator driving unit 17 based on the operation information of the interface control unit 30. Here, at least the compressor 6a, the blower 5, and the discharge window shutter drive motor 11 are called "actuators." The communication wiring 44 transmits information such as operation state monitoring and abnormality of each actuator from the actuator driving unit 17 to the interface control unit 30. The synchronization signal wiring 45 transmits a power synchronization signal which is an output signal of the power synchronization detection unit 19 to the actuator driving unit 17.

The function of the power detection section 18 will be described in detail. When power is supplied from the AC power source 13, the DC power is supplied from the power circuit unit 15 to the display operation device 7, so the display operation device 7 is always operated. Since the operation system of the display operation device 7 can be regarded as being supplied with power from the AC power source 13, it does not need to be specially The power detection section 18 is intentionally provided. However, the power supply circuit unit 15 includes a large first smoothing capacitor C1 because it requires frequency conversion control. Furthermore, in the embodiment, when the actuator is stopped, the power supply unit switch 16 and the detection unit switch 20 are set to be non-conducting so as to prevent useless standby current from flowing. As a result, even after the AC power source 13 is disconnected, power is continuously supplied to the display operation device 7 by the residual voltage of the first smoothing capacitor C1.

The power source detection unit 18 transmits a detection signal to the first microcomputer 30 a of the interface control unit 30 when it detects that there is no AC power from the AC power source 13. This detection signal is transmitted through the signal wiring 41 in a very short time. When the interface control unit 30 receives a detection signal indicating that there is no AC power from the AC power source 13, it executes a predetermined “stop process”.

As a specific example of the stop processing, the processing at the time of power failure may also be performed, for example, the first to fourth examples are listed at least as follows. As a first example, the stop processing may include a "prohibition operation processing". The operation prohibition process is a process in which the interface control unit 30 does not accept the operation of the operation unit 32.

In the embodiment, the interface control unit 30 includes a display unit 31 for providing a video to a user. In this case, as a second example, the stop processing may include a stop display processing of the display section 31, a display processing of a predetermined stop operation image of the display section 31, and an alarm when the plug of the display section 31 is unplugged. Any one of the screen display processes.

As a third example, the stop processing may include "light-off processing". The light-off process is a process of turning off the machine power lamp when the interface control unit 30 includes the machine power lamp.

In the embodiment, the actuator driving section 17 and the interface control section 30 A communication wiring 44 is provided to communicate the presence or absence of an abnormality. Furthermore, in the embodiment, a notification means for notifying a user of an alarm is provided, and this notification means is the display unit 31 in the embodiment. In this case, as a fourth example, the stop processing may include "alarm stop processing". The alarm stop process is a process in which the notification means does not notify the abnormality alarm indicating that the actuator drive unit 17 has not implemented the operation accepted by the operation unit 32.

By quickly performing the stop process, it is possible to avoid an error in which the AC power source 13 is disconnected and the actuator is to be operated.

When AC power is supplied from the AC power source 13, the power source detection unit 18 is always energized. From the standpoint of reducing standby power, it is better that the power detection section 18 is as low power as possible.

FIG. 4 is a flowchart for explaining the operation of the home appliance 100 according to the embodiment of the present invention. The flowchart in FIG. 4 shows a control program executed by the first microcomputer 30 a of the interface control unit 30.

When the power plug 101 is connected to the AC power source 13 and the main power switch 7a is turned on, the first microcomputer 30a is energized. When the first microcomputer 30a is energized, the normal mode shown in FIG. 4 is activated.

First, in step S101, it is determined whether the power source detection unit 18 has detected the connection of the AC power source 13. If the determination result of step S101 is Yes, the process proceeds to step S102.

In step S102, a start screen is displayed on the display unit 31, and the operation unit 32 is in a state of accepting an operation. In addition, for example, when the home appliance 100 is just powered on, since the operation switch 32a has not been turned on, actuators such as the compressor 6a are not driven. Therefore, the first step S102 after the power is turned on The household electrical appliance 100 is in a standby mode.

If the determination result in step S101 is No, the process proceeds to step S110. In step S110, if the power supply detection section 18 detects that no AC power is input during the execution of the standby mode, the power supply section switch 16 is turned on, and even in the standby mode, the power supply section switch 16 is turned on, because Since the actuator driving section 17 is energized, the electric charge stored in the second smoothing capacitor C2 in the actuator driving section 17 can be quickly consumed. In addition, by turning on the power supply section switch 16 even in the standby mode, the charge of the first smoothing capacitor C1 included in the power supply circuit section 15 can be quickly discharged. Thereby, the electric charges of the first smoothing capacitor C1 and the second smoothing capacitor C2 are consumed by the driving circuit 17a. In addition, in the embodiment, the above-mentioned "stop processing" is also performed in step S110. In the embodiment, the execution stop process is the first operation prohibition process and the display unit 31 is one of the second example display stop processes. However, this stop processing may be omitted. Then, the processing moves to step S105.

In step S105, it is determined whether the energization flag is set to 1. When the energization flag is not 1, the process returns to step S101.

After the step S102 becomes the standby mode, the processing moves to step S103. In step S103, it is determined whether the operation switch 32a included in the operation section 32 is operated to be turned on. When a turn-on signal indicating that the operation switch 32a is turned on has occurred, the process proceeds to step S104.

In step S104, the power supply section switch 16 and the detection section switch 20 are turned on via the control wiring 43, and the actuator drive section 17 and the power supply synchronization detection section 19 are activated. Then, the energization flag is set to one. Therefore, the first microcomputer 30a stores a power-on state. According to the operation of the operation unit 32, the actuator drive unit 17 Send an action command. Then, the process returns to step S101. In step S101, as long as the power source is detected and the operation switch 32a does not become non-conductive, the actuator driving section 17 continues to drive the actuator.

In step S103, if the operation switch 32a is still off, the processing moves to step S105.

The state of the power-on flag is determined in step S105. Here, as long as the actuator driving unit 17 is turned on once in step S104, the energization flag is set to one. In this case, the process proceeds to step S106.

In step S106, it is determined whether the 10-second timer is operating. If the 10-second timer is not activated, the process proceeds to step S109, and the 10-second timer is started. When the 10-second timer operates, the process proceeds to step S107, and it is determined whether the 10-second timer indicates that 10 seconds have elapsed. If 10 seconds have not elapsed in step S107, the process returns to step S101, the program is looped, and step S107 is repeated while waiting for 10 seconds to elapse.

If 10 seconds have passed in step S107, the processing moves to step S108. In step S108, the power supply section switch 16 and the detection section switch 20 are rendered non-conductive via the control wiring 43, whereby the actuator drive section 17 and the power supply synchronization detection section 19 stop operating. Further, the energization flag is set to zero, and the 10-second timer is reset. The process then returns to step S101.

As described above, the home appliance 100 according to the embodiment includes the power circuit unit 15, the power detection unit 18, the actuator drive unit 17, and the power unit switch 16. By executing the standby mode in step S102, the power supply section switch 16 is turned off. Then, in the execution of the standby mode, the processing is performed as step S103 → step S105 → step S101, and the power detecting section 18 detects that When the AC power is input, the process proceeds to step S110. In this step S110, the power supply unit switch 16 is turned on and the actuator drive unit 17 is energized, whereby the electric charges of the first smoothing capacitor C1 and the second smoothing capacitor C2 can be quickly discharged by the drive circuit 17a.

If according to steps S106, S107, and S109, after the power supply part switch 16 is turned from non-conducting to conductive, a predetermined time period of 10 seconds elapses, and the power supply part switch 16 is kept on. The 10-second timer is shown below. When the operation switch 32 a is repeatedly opened / closed, the actuator drive section 17 is repeatedly energized and de-energized due to the opening / closing of the power supply section switch 16. The second microcomputer 17b of the actuator driving unit 17 executes a start-up process after the power is turned on. When the actuator drive unit 17 is repeatedly powered on and off, the second microcomputer 17b repeatedly repeats the initial processing. Such repetition of the initial processing may cause the operation of the home appliance 100 to become unstable. Therefore, once the power is turned on, the power supply section switch 16 is ensured to be turned on for 10 seconds, thereby preventing repetition of the initial processing. It is not limited to 10 seconds, and a time longer or shorter than 10 seconds may be set.

In the home appliance 100 according to the embodiment described above, during the execution of the standby mode in step S102, the power supply unit switch 16 and the detection unit switch 20 are set to be non-conductive. Therefore, the actuator driving unit 17 and the power synchronization detecting unit 19 are stopped, and power consumption is suppressed. The relationship between the fully charged electric charge of the first smoothing capacitor C1 provided in the power circuit section 15 and the power consumption in the standby mode varies depending on the design. For example, by fully suppressing the power consumption, the fully charged electric charge of the first smoothing capacitor C1 is an amount sufficient to make up the power consumption in the standby mode at a sufficient time. The sufficient time is, for example, 1 minute or more. In this case, after performing steps S102 → S103 → S105, the power plug 101 When unplugged, the screen display state of the display unit 31 in the standby mode may continue for a long time of more than 1 minute. In this regard, in the embodiment, the process proceeds to step S110, and the charge of the first smoothing capacitor C1 can be quickly discharged. Therefore, both the power consumption and the rapid discharge of the residual charge of the capacitor can be suppressed.

FIG. 5 is a circuit diagram of the power supply synchronization detection unit 19 of the home appliance according to the embodiment of the present invention. The power synchronization detecting section 19 includes a first resistor 141, a second resistor 144, a diode 142 for preventing reverse voltage, and a photocoupler 143.

The first resistor 141 receives AC power from the AC power source 13 at one end. The anode of the diode 142 is connected to the other end of the first resistor 141. In the photocoupler 143, a current signal flowing from the cathode of the diode 142 is transmitted to the photocrystal through the light emitting diode. A control power is supplied to one end of the second resistor 144, and the other end of the second resistor 144 is connected to a photo-crystal of the photo-coupler 143. A synchronous signal wiring 45 is connected to the other end of the second resistor 144 and a connection point of the photo-crystal of the photo-coupler 143. A current signal is output from the synchronization signal wiring 45.

When the AC power source 13 is connected, only a half-wave current flows through the first resistor 141, the diode 142, and the light-emitting diode of the photocoupler 143. With this half-wave current, the photo-crystal of the photo-coupler 143 becomes conductive. When the photo-crystal is turned on, the synchronization signal transmitted on the synchronization signal wiring 45 is reversed from a high level to a low level.

The power source detection unit 18 can also be implemented by using the same circuit components and circuit connections as the circuit configuration of the power supply synchronization detection unit 19 shown in FIG. 5. here In this case, the synchronization signal wiring 45 in FIG. 5 is used as a signal wiring 41 for outputting a detection signal from the power detection section 18. In addition, in order to reduce the power consumption during standby, the resistance value of the first resistor 141 that may constitute the power synchronization detecting section 19 is preferably as small as possible. For example, in a case where the AC power source 13 is 220V, when the circuit in FIG. 5 is used as the power source synchronous detection section 19, the resistance value of the first resistor 141 may be set to 30 kΩ. In the case where the AC power source 13 is 220V, when the circuit of FIG. 5 is used as the power source detecting section 18, the resistance value of the first resistor 141 may be set to 600 kΩ. When the first resistor 141 is set to 600 kΩ, false signals are likely to occur due to external noise or the like. However, the function of the power source detection section 18 that determines only the presence or absence of the AC power source 13 is sufficient.

FIG. 6 is an example of a hardware configuration diagram of the interface control unit 30.

The function of the first microcomputer 30a in the interface control section 30 is realized by a processing circuit. The processing circuit may be dedicated hardware 50. The processing circuit also includes a processor 51 and a memory 52. A part of the processing circuit may be formed by dedicated hardware 50, and further includes a processor 51 and a memory 52. FIG. 6 shows an example of a case where the processing circuit is formed by a dedicated hardware 50 and includes a processor 51 and a memory 52.

In the case where at least a portion of the processing circuit is at least one dedicated hardware 50, the processing circuit is, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, ASIC, FPGA, or a combination of these.

When the processing circuit includes at least one processor 51 and at least one memory 52, each function of the interface control unit 30 is implemented by software, firmware, or a combination of software and firmware. The software and firmware are described as programs and stored in the memory 52. The processor 51 is a program stored in the memory 52 by reading And execute to realize the functions of each department. The processor 51 is also referred to as a CPU (Central Processing Unit), a central processing device, a processing device, a computing device, a microprocessor, a microcomputer, and a DSP. The memory 52 is a nonvolatile or volatile semiconductor memory such as RAM, ROM, flash memory, EPROM, EEPROM, and the like.

In this way, the processing circuit can implement each function of the interface control unit 30 by hardware, software, firmware, or a combination of these. In addition, each function of the actuator driving section 17 is also realized by a processing circuit that is the same as the processing circuit shown in FIG. 6.

Claims (2)

A household electrical appliance includes a power supply circuit unit that receives AC power and generates internal power; a power detection unit that detects whether the AC power is input to the power circuit unit; an actuator driving unit that is connected to an actuator Connected and driving the actuator with a drive circuit containing a smoothing capacitor; and a power supply part switch interposed between the actuator drive part and the power supply circuit part and driving to the actuator by becoming conductive The internal power source generated by the power circuit is transmitted by the power supply; when the predetermined standby mode start condition is satisfied, a standby mode that causes the power supply unit switch to become non-conductive and stops the actuator is executed; When the power source detecting section detects that the AC power is not input, the electric charge of the smoothing capacitor is discharged by the driving circuit by turning on the switch of the power source section to be turned on. A household electrical appliance includes: a power supply circuit section that receives AC power and generates internal power with a circuit containing a smoothing capacitor; a power supply detection section that detects whether the AC power is input to the power supply circuit section; an actuator drive section Is connected to the actuator and drives the actuator with a drive circuit; and a power supply part switch is interposed between the actuator drive part and the power supply circuit part, and is turned to the actuation by becoming conductive The driver driving section transmits the internal power generated by the power supply circuit section; when a predetermined standby mode start condition is established, executes a standby mode in which the switch of the power supply section becomes non-conductive and stops the actuator; When the power supply detection section detects that the AC power is not input during the execution, the electric charge of the smoothing capacitor is discharged by the driving circuit by turning on the switch of the power supply section.