WO2021248950A1

WO2021248950A1 - Washing machine

Info

Publication number: WO2021248950A1
Application number: PCT/CN2021/080192
Authority: WO
Inventors: 礒永久史
Original assignee: 青岛海尔洗衣机有限公司; Aqua株式会社; 海尔智家股份有限公司
Priority date: 2020-06-09
Filing date: 2021-03-11
Publication date: 2021-12-16
Also published as: CN115698413A; JP2021194063A

Abstract

A washing machine (100), comprising: a door lock device (4), for switching a door (3) to be in a locked state or an unlocked state; an auxiliary drain pipeline (17), provided with an auxiliary drain valve (17a) and draining remaining water in a drum (2); a control unit (7) for controlling the door lock device and the auxiliary drain valve; a power storage unit (18), for storing power supplied from an external power supply (8); and an auxiliary power supply circuit (19), for supplying power from the power storage unit to the control unit, the door lock device, and the auxiliary drain valve during a power failure. Thus, the function of the control unit and the operation of the door lock device and the auxiliary drain valve is ensured during a power failure, so that during a power failure, the door can be opened to take out clothes in a state where water is drained to a certain extent.

Description

washing machine

Technical field

The present invention relates to, for example, a washing machine equipped with a door lock device for preventing the door from opening.

Background technique

In the past, washing machines usually have a door lock device for preventing the door from opening. The door lock device locks and unlocks the door according to the control signal from the control unit.

In addition, the control and control unit also regards the water supply valve and the drain valve provided in the water supply channel and the drain channel for water supply and drainage of the drum as the control object. The water supply valve and the drain valve open and close the valve according to the control signal from the control unit to perform water supply and drainage to the drum.

The control unit stores a program for controlling the operation of the washing machine in advance, and controls the door lock device, the drain valve, and the drain valve according to the program.

The door lock device, the water supply valve, the drain valve, and the control unit receive power from an external power source to operate. Therefore, when a power failure occurs during the operation of the washing machine, almost all functions will be stopped.

As a conventional power failure countermeasure, the proposals shown in Patent Documents 1 to 3 have been proposed. Patent Document 1 is configured to supply electric power from a dry battery or the like to a solenoid of a door lock device to unlock the door when electric power cannot be supplied from a commercial power source due to a power outage or disconnection.

Patent Document 2 is configured to connect a latched contact linked to a door lock in parallel with a power supply relay, thereby detecting a power outage during operation and automatically recovering operation from the middle of the process after the power supply is restored.

Patent Document 3 discloses a safety-ensure washing machine, which can only release the door lock after the rotation stops after the predetermined time required for the dewatering tank to stop when it is operated after a power failure in the state of a brake failure. .

In areas with poor power supply, disaster-stricken areas, etc., power outages sometimes occur frequently and cannot be recovered immediately. As a countermeasure to prevent clothing from being locked during a power failure, the structure shown in Patent Document 1 described above may be one of the effective solutions.

However, even if the door lock is released, the clothes that have absorbed a large amount of water must be taken out in the presence of remaining water. In particular, in the case of a drum-type washing machine that rotates around an axis that is horizontal or inclined with respect to the horizontal, a structure and a control sequence in which the door cannot be opened while there is residual water are generally adopted. From the perspective of such residual water, new power outage countermeasures need to be sought.

Prior art literature

Patent literature

Patent Document 1: Japanese Patent Application Publication No. 2002-70388

Patent Document 2: Japanese Patent Application Publication No. 2009-78025

Patent Document 3: Japanese Patent Application Publication No. 2010-88761

Summary of the invention

The problem to be solved by the invention

The object of the present invention is to provide a washing machine that takes into account the remaining water during a power outage to properly unlock the door and take out the laundry.

Solution to the problem

That is, the washing machine of the present invention is characterized by comprising: a drum arranged in a cabinet; a door provided in the cabinet so as to be openable and closable; a door lock device that switches the door to a locked state or an unlocked state; and a water supply path , Having a water supply valve to supply water to the drum; a main drain path, having a main drain valve, draining the drum; an auxiliary drain path, having an auxiliary drain valve, draining the remaining water in the drum; control unit , To control the door lock device, the water supply valve, the main drain valve, and the auxiliary drain valve; the main power supply circuit is connected to an external power source and supplies the door lock device, the water supply valve, and the The main drain valve and the control unit supply power; the power storage unit stores electric power supplied from the external power source; and an auxiliary power supply circuit that supplies power from the power storage unit to the control unit and the control unit during a power failure. The door lock device and the auxiliary drain valve.

In the washing machine of the present invention, it is preferable that the washing machine is configured to drive the door lock device, the water supply valve, the main drain valve, and the auxiliary drain valve based on a first voltage and to drive the door lock device, the water supply valve, the main drain valve, and the auxiliary drain valve based on a second voltage. The control unit is driven, the power storage unit stores the first voltage, and the second voltage is generated by voltage conversion of the first voltage of the power storage unit.

In the washing machine of the present invention, it is preferable that the washing machine includes a water level detection unit that detects the water level in the drum, and the control unit determines that the drum is stored in the drum based on the detection value of the water level detection unit during a power failure. In the case of remaining water, the auxiliary drain valve is controlled to drain water.

In the washing machine of the present invention, it is preferable that when the control unit determines that there is remaining water in the drum, the door lock device is unlocked after controlling the auxiliary drain valve to drain water.

In the washing machine of the present invention, it is preferable that the washing machine includes a voltage monitoring unit that monitors the voltage of the battery, and when the voltage monitored by the voltage monitoring unit is lower than a predetermined threshold, the control unit Even in the process of controlling the auxiliary drain valve to drain water, the unlocking is preferentially performed.

In the washing machine of the present invention, it is preferable that the drum is assembled around a horizontal axis or an axis inclined with respect to the horizontal direction.

Invention effect

The washing machine of the present invention is provided with: a door lock device to switch the door to a locked state or an unlocked state; an auxiliary drain path with an auxiliary drain valve to drain the remaining water of the drum; a control part to control the door lock device and the auxiliary drain valve; The power storage unit accumulates power supplied from an external power source; and an auxiliary power supply circuit that supplies power from the power storage unit to the control unit, the door lock device, and the auxiliary drain valve in the event of a power failure.

As a result, the function of the control unit can be ensured during a power failure, and the operation of the door lock device and the auxiliary drain valve can be ensured, so that the door can be opened during a power failure, and the clothes can be taken out with a certain degree of water discharged during the power failure. .

In the washing machine of the present invention, the power storage unit stores the first voltage that can drive the door lock device, and the second voltage that drives the auxiliary drain valve is generated by voltage conversion of the first voltage. Therefore, there is only one power storage unit. Seek the simplification of the structure.

In the washing machine of the present invention, a water level detection unit that detects the water level in the drum is provided, and the control unit controls the auxiliary drain valve to drain when it is determined that there is residual water in the drum, so the operation of the auxiliary drain valve is limited to only when necessary In this way, unnecessary power consumption can be suppressed.

In the washing machine of the present invention, the control unit unlocks the door lock device on the basis of controlling the auxiliary drain valve to drain the water in the presence of residual water. Therefore, it is undesirable for the case where the door cannot be opened during the period of the residual water. It is effective to open the door to take out the clothes in the state of remaining water.

In the washing machine of the present invention, a voltage monitoring unit that monitors the voltage of the battery is provided. When the voltage monitored by the voltage monitoring unit is lower than a predetermined threshold, the control unit will give priority even when controlling the auxiliary drain valve to drain water. It is unlocked, so it can be unlocked before the excitation energy of the solenoid disappears due to insufficient power storage.

In the washing machine of the present invention, the drum is assembled so as to rotate around a horizontal axis or an axis inclined with respect to the horizontal direction. In a washing machine with a structure in which the door cannot be opened while there is residual water, and with sequence control, the execution is in progress. The sequence of unlocking the door lock device is performed on the basis of drainage, so that the clothes can be taken out reliably in the event of a power failure.

Description of the drawings

Fig. 1 is a schematic cross-sectional view of a washing machine 100 according to an embodiment of the present invention.

Fig. 2 is a block diagram showing a power supply system and a control system of the washing machine 100 of Fig. 1.

FIG. 3 is a specific circuit diagram of the washing machine 100 of FIG. 2.

Fig. 4 is a timing chart showing the power supply system and control system of the washing machine 100 of Fig. 1.

Fig. 5 is a flowchart showing a power supply system and a control system of the washing machine 100 of Fig. 1.

Fig. 6 is a circuit diagram showing a modification of the present invention.

Fig. 7 is a circuit diagram showing a modification of the present invention

Fig. 8 is a circuit diagram showing a modification of the present invention.

Description of Reference Signs

1: Cabinet; 2: Drum; 3: Door; 4: Door lock device; 5: Water supply line; 5a: Water supply valve; 6: Main drain line; 6a: Main drain valve; 7: Control unit; 8: External power supply 9: Main power supply circuit; 17: Auxiliary drain; 17a: Auxiliary drain valve; 18: Power storage unit; 19: Auxiliary power supply circuit; 22: Power storage unit (charging circuit); 25: Water level detection unit; 26: Voltage Monitoring part; 70: control part (microcomputer); 100: washing machine; VDD, Vcap1: first voltage; Vcap2: second voltage.

detailed description

Hereinafter, a washing machine 100 according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic cross-sectional view of a washing machine 100 according to an embodiment of the present invention, and FIG. 2 is a block diagram showing a power system and a control system of the washing machine 100.

The washing machine 100 is equipped with: a drum 2, which is arranged in the cabinet 1, a door 3, which is openable and closable in the cabinet 1, a door lock device 4, which switches the door 3 to a locked state or an unlocked state; and a water supply path 5 with a water supply valve 5a, supply water to the drum 2; the main drain path 6, which has a main drain valve 6a, drains the drum 2; a control unit 7, which controls the door lock device 4, the water supply valve 5a, and the main drain valve 6a; and the main power supply circuit 9 , Is connected to an external power source 8 to supply power to the door lock device 4, the water supply valve 5a, the main drain valve 6a, and the control unit 7.

The washing machine 100 is provided with a substantially cylindrical outer tub 10 inside a box-shaped housing 1. Inside the outer tub 10, a main shaft 11 extending in a horizontal direction and a rear direction is pivotally supported by a substantially circular shape for accommodating laundry. Drum 2 in the shape of a tube. The laundry inlet 10a formed on the front surface of the outer tub 10 is opened and closed by the door 3, and the laundry can be taken and put into the drum 2 with the door 3 open.

The drum 2 can rotate around the axis of the main shaft 11. Many liquid holes 2a are provided through the peripheral surface of the drum 4, and the water and solvent supplied into the outer cylinder 10 during washing and rinsing flow into the drum 2 through the liquid holes 2a. The water and the solvent removed from the laundry inside are scattered through the liquid through hole 2a to the outer cylinder 10 side.

The main shaft 11 is rotatably supported by a bearing 11 a attached to the back wall of the outer cylinder 10, and further, a main pulley 12 is attached to the front end of the main shaft 11 protruding rearward. A motor 13 is provided at the bottom of the box 1, and a motor pulley 14 is mounted on the rotating shaft of the motor 13. The rotational power of the motor pulley 14 is transmitted to the main pulley 12 via the timing belt 15. As a result, when the motor 13 is driven, the drum 2 rotates around the axis of the main shaft 11 at a rotation speed at which the rotation speed of the motor 13 is reduced in accordance with a predetermined reduction ratio.

A door lock device 4 for preventing the door 3 from opening is provided on the front surface of the box body 1. The door lock device 4 is controlled to be an unlocked state that can open the door 6 when the rotation speed of the drum 2 is less than a predetermined predetermined rotation speed, and is controlled to be a lock that cannot open the door 6 when the rotation speed of the drum 4 exceeds the predetermined rotation speed. Door status.

The door lock device 4 has a locking portion 4a. The locking portion 4a is arranged at the locking position of the locking door 3 in the locked state to prevent the door 3 from opening, and is arranged at the unlocking position of the non-locking door 3 in the unlocked state. In order to be able to open the door 3.

The door lock device 4 includes a solenoid 4b as a driving device so as to switch the position of the locking portion 4a to either a locking position or a releasing position.

The water supply path 5 is constituted by a pipe provided at a position penetrating the upper part of the back wall of the outer cylinder 10 and includes a water supply valve 5 a. When the water supply valve 5 a is opened, water and solvent are supplied to the outer cylinder 10 via the water supply path 5. The supplied water and solvent are also supplied into the drum 2 via the liquid passage hole 2a.

The drainage channel 6 is composed of a pipe provided at a position that penetrates the bottom of the outer cylinder 2 and is equipped with a drainage valve 6a. When the drainage valve 6a is opened, the water and solvent supplied into the drum 2 and the outer cylinder 10 pass through the drainage channel 6 Exhaust to the outside of the machine.

The control unit 7 of the washing machine 100 is composed of, for example, a microcomputer, etc., and includes: a CPU (Central Process Unit); a ROM (Random Access Memory), which stores programs for controlling the operation of the washing machine 100; and RAM (Read-Only Memory: read-only memory), which temporarily stores data used when executing the above-mentioned programs. The operation of the washing machine 100 is controlled by the control unit 7.

The control unit 7 controls the locked state of the door lock device 4 and the open and close states of the water supply valve 5a and the main drain valve 6a.

As an electric power system, a main power supply circuit 9 connected to an external power source and supplying power to the door lock device 4, the water supply valve 5 a, the main drain valve 6 a, and the control unit 7 is connected to the external power source 8 via the external power source connection unit 16. The external power source 8 is a three-phase AC power source in the case of commercial use, and is a two-phase AC power source in the case of household use.

In such a structure, for example, when water is poured into the drum 2 and a power outage occurs after the operation of the door lock device 4 is in the locked state, the door 3 is kept in the locked state and the control unit 7, the door lock device 4. When the main drain valve 6a is in an inoperable state, the clothes, water and solvent are locked together.

Therefore, in addition to the above-mentioned structure, the washing machine 100 further includes: an auxiliary drain path 17 having an auxiliary drain valve 17a to drain the remaining water in the drum 2; a power storage unit 18 storing electric power introduced by the external power source 8; and auxiliary The power supply circuit 19 is connected to the power storage unit 18, and supplies power to the control unit 7, the door lock device 4, and the auxiliary drain valve 17a in the event of a power failure.

In order to drain the water and solvent in the drum 2 and the outer cylinder 10 to the outside of the machine in a route different from the main drain route 6, an auxiliary drain route 17 is provided. The auxiliary drainage channel 17 of this embodiment is composed of a pipe that is provided at a position that penetrates the outer cylinder 10 at a position different from the main drainage channel 6. The downstream piping merges. Of course, the piping of the auxiliary drain channel 17 may be branched from the piping upstream of the main drain valve 5a in the main drain channel 6, and the piping on the downstream side of the auxiliary drain valve 17a in the auxiliary drain channel 17 may not be connected to the main drain The piping of 6 merges.

In such a way that the auxiliary drain valve 17a is also controlled by the control unit 7 to open and close, the control unit 7 stores necessary programs and data.

The auxiliary drain valve 17a is an emergency device that is driven by the electric power of the power storage unit 18 in the event of a power failure, and it is necessary to suppress power consumption. Therefore, for the auxiliary drain valve 17a, a drain valve that is smaller than the main drain valve 6a and whose piping in the auxiliary drain path 17 is also smaller than the piping diameter of the main drain path 6 can be used.

The power storage unit 18 accumulates the power of the external power supply 8 in the form of direct current power while the external power supply connection unit 16 is connected to the external power supply 8.

The auxiliary power supply circuit 19 serves as an alternative circuit for the main power supply circuit 9 in the event of a power failure, and supplies the electric power of the power storage unit 18 to the control unit 7, the door lock device 4, and the auxiliary drain valve 17a in the event of a power failure.

Thereby, the door lock device 4 can be unlocked and the remaining water in the drum 2 and the outer tube 10 can be drained during a power failure.

Fig. 3 is a circuit diagram showing a specific scheme of the block diagram of Fig. 2. The external power supply connection portion 16 is connected to a commercial AC 200V as the external power supply 8. For household use, it is AC100V. A rectifier circuit 20 is connected to this external power supply connection part 16, and the rectifier circuit 20 converts AC200V into, for example, DC310V. A main voltage conversion unit 21 such as a DC-DC converter is connected to the rectifier circuit 20. The main voltage conversion unit 21 outputs DC12V as the first voltage to the first output terminal 21a and outputs DC5V as the second voltage to the second output terminal 21b. .

A charging circuit 22 that functions as the power storage unit 18 of the present invention is connected to the first output terminal 21a. The charging circuit 22 outputs the voltage Vcap1 to the output terminal while accumulating DC12V. In the case of this embodiment, this Vcap1 is equal to the first voltage and is 12V. The charging circuit 22 accumulates an amount of energy sufficient to excite the solenoid 4b of the door lock device 4 and the auxiliary drain valve 17a during a predetermined time period after the power failure.

The voltage Vcap1 is input to the solenoid control circuit 40 provided in the door lock device 4. The solenoid control circuit 40 receives a lock and unlock signal from a microcomputer unit (hereinafter referred to as a "microcomputer") 70 constituting the control unit 7, and performs power supply to the door lock device 4 and drive of the solenoid 4b.

The voltage Vcap1 is also output to the water supply control circuit 50 attached to the water supply valve 5a, the main drain control circuit 60 attached to the main drain valve 6a, and the auxiliary drain control circuit 170 attached to the auxiliary drain valve 17a. The water supply control circuit 50, the main drain control circuit 60, and the auxiliary drain control circuit 170 receive instructions from the microcomputer 70 to control the opening and closing of the water supply valve 5a, the main drain valve 6a, and the auxiliary drain valve 17a, respectively.

The microcomputer 70 operates by controlling the voltage VDD. The control voltage VDD is supplied from the second output terminal 21 b of the main voltage conversion unit 21 to the microcomputer 70 via the relay 23. The relay 23 is a C contact type relay, and the contact is usually on the NO (normally open) side, and DC5V is directly input to the microcomputer 70 as the control voltage VDD.

When the output voltage DC12V of the main power conversion unit 21 is lower than the open voltage at the time of a power failure, the contact of the relay 23 is switched from the NO side to the NC (normally closed) side. A sub-voltage conversion unit 24 such as a regulator is connected to the charging circuit 22, and the sub-voltage conversion unit 24 converts the voltage Vcap1 of the charging circuit 22 into a voltage Vcap2 and inputs it to the NC terminal of the relay. Vcap2 is set to DC5V, and this voltage DC5V is input to the microcomputer 70 as the control voltage VDD.

The main power supply circuit 9 is configured as a line connecting the external power supply connection portion 16, the rectifier circuit 20, the main voltage conversion portion 21, and the charging circuit 22, and the charging circuit 22 and the door lock device control circuit 40, the water supply control circuit 50, and the main drainage control The lines connected to the circuits 60 supply power to the door lock control circuit 40, the water supply control circuit 50, and the main drain control circuit 60 when there is no power failure. In addition, the main power supply circuit 8 is arranged as a line connecting the external power supply connection unit 16, the rectifier circuit 20, the main voltage conversion unit 21, the relay 23, and the microcomputer 70, and supplies power to the microcomputer 70 when there is no power failure.

The auxiliary power supply circuit 19 is configured as a circuit that connects the charging circuit 22 to the door lock control circuit 40 and the auxiliary drain control circuit 170, respectively, and performs voltage Vcap1 from the charging circuit 22 to the door lock control circuit 40 and the auxiliary drain control circuit 170 in the event of a power failure. powered by. In addition, the auxiliary power supply circuit 19 is arranged as a line connecting the charging circuit 22, the sub-voltage conversion unit 24, the relay 23, and the microcomputer 70, and supplies the voltage Vcap2 from the charging circuit 22 to the microcomputer 70 as the control voltage VDD in the event of a power failure.

The microcomputer 70 is connected with a water level sensor 25 as a water level detection unit that detects the water level in the outer cylinder 10, and a water level signal is input to the microcomputer 70 regardless of the power failure or power failure. The water level sensor 25 detects the presence or absence of remaining water by, for example, a buoy that moves up and down according to the water level.

The voltage monitoring unit 26 is connected to the microcomputer 70 to observe the power storage status of the charging circuit 22. The voltage monitoring unit 26 inputs the output voltage Vcap1 of the charging circuit 22, and inputs a level signal corresponding to the charging voltage to the microcomputer 70.

A power failure detection unit 27 is connected to the microcomputer 70 to detect a power failure. The power failure detection unit 27 inputs the voltage appearing at the output terminal to detect whether a voltage of DC310V is being output from the output terminal of the rectifier circuit 20, and inputs a level signal corresponding to the voltage to the microcomputer 70.

FIG. 4 is a timing chart showing the sequence control performed by the microcomputer 70 at the time of a power failure, and FIG. 5 is a flowchart showing the flow of the sequence control.

＜When there is no power failure＞

When there is no power failure, the power failure detection unit 27 detects DC 310V. The relay 23 is on the NO contact side, and the charging circuit 22 accumulates energy to drive the solenoid 4b of the door lock device 4 and the auxiliary drain valve 5a. The output voltage Vcap1 of the charging circuit 22 is supplied to the door lock control device 7, the water supply valve 5a, and the main drain valve 6a, and the output voltage Vcap1 of the charging circuit 22 is supplied from the NO of the relay 23. The terminal side supplies the control voltage VDD to the microcomputer 70.

When a power failure occurs, there is no supply of AC200V, so the rectified DC voltage (DC310V, DC12V, DC5V) also drops shortly thereafter. The power failure detection unit 27 detects a change in the input voltage of the main voltage conversion unit 21 from DC 310V to 0V. Along with this, the control voltage VDD also starts to drop from DC5V.

When the DC12V from the main voltage converter 21 is lower than the open voltage of the relay 23 during a power failure, the contact is automatically switched from the NO side to the NC side. Therefore, the voltage Vcap2 supplied from the charging circuit 22 via the sub-voltage conversion unit 24 is supplied to the microcomputer 70 as a substitute power supply VDD. As a result, VDD recovers the voltage.

When a power failure is detected, the microcomputer 70 detects the current water level based on the signal from the water level sensor 25, and determines whether there is any remaining water in the drum 2 and the outer tub 10.

When it is determined that there is residual water, if the voltage of the charging circuit 22 does not drop in step S7 described later, the energy stored in the charging circuit 22 is used to drive the auxiliary drain valve 17 in accordance with a command from the microcomputer 70 The auxiliary drainage control circuit 170 performs auxiliary drainage.

When there is no remaining water in step S3 or after the microcomputer 70 determines that the remaining water is drained, the remaining water in the drum 2 and the outer cylinder 10 disappears, immediately at the stage when the operation timing of the door lock device 4 meets the predetermined unlocking condition (Step S5) The solenoid 4b is excited by the energy stored in the charging circuit 22, and the lock of the door lock device 4 is released (Step S6). After the water level is detected, when the set time has passed, the button operation is performed, etc., various settings can be made in advance to the predetermined conditions as the trigger conditions. If the lock of the door lock device 4 is released, the door 3 can be opened to take out the clothes.

It should be noted that even if there is residual water in step S3, if the charging voltage of the charging circuit 22 exceeds the threshold value that can ensure the excitation energy of the solenoid 4b and then drops, even during the operation of the auxiliary drain valve 17a The unlocking of door 3 is also prioritized.

The washing machine 100 of this embodiment has a mechanical structure: a drum 2, which is arranged in the cabinet 1, a door 3, which is openable and closable in the cabinet 1, and a door lock device 4, which switches the door 3 to a locked state or an unlocked state ; The water supply path 5 has a water supply valve 5a to supply water to the drum 2; the main drain path 6 has a main drain valve 6a to drain the drum 2; The water is drained.

In addition, the washing machine 100 is equipped with a microcomputer 70 on the power system and the control system, which functions as a control unit to control the door lock device 4, the water supply valve 5a, the main drain valve 6a, and the auxiliary drain valve 17a through the

control circuits

40, 50, 60, 170. Control; the main power supply circuit 9, connected to the external power supply 8, to supply power to the door lock device 4, the water supply valve 5a, the main drain valve 6a, and the microcomputer 70; the charging circuit 22, as a power storage unit, accumulates power supplied from the external power supply 8; And the auxiliary power supply circuit 19 supplies the power of the charging circuit 22 to the microcomputer 70 and to the door lock device 4 and the auxiliary drain valve 17a in the event of a power failure.

As a result, the function of the microcomputer 70 is ensured during a power failure and the operation of the door lock device 4 and the auxiliary drain valve 17a is ensured, so that the door 3 can be opened during a power failure, and water can be discharged to a certain extent during a power failure. Take out the clothes.

In the washing machine 100 of this embodiment, it is configured to drive the door lock device 4, the water supply valve 5a, the main drain valve 6a, and the auxiliary drain valve 17a based on the first voltage (12V, Vcap1) and to drive the door lock device 4, the water supply valve 5a, the main drain valve 6a, and the auxiliary drain valve 17a based on the second voltage (5V, Vcap2). ) The microcomputer 70 is driven, the charging circuit 22 accumulates the first voltage Vcap1, and the second voltage Vcap2 is generated by voltage conversion of the first voltage Vcap1 of the charging circuit 22. Therefore, only one charging circuit 22 is required, and cost reduction can be achieved.

In addition, the control voltage VDD is supplied from the main voltage conversion unit 21 to the microcomputer 70 via the relay 23 during a power failure, and the charging circuit 22 is supplied to the microcomputer 70 via the second conversion unit 24 and the relay 23 to the microcomputer 70 equivalent to the control voltage only during a power failure. The voltage Vcap2 of VDD. The microcomputer 70 is always energized for 24 hours even when it is to be washed. Therefore, by supplying power without passing through the charging circuit 22 when the power is not interrupted as described above, it is possible to suppress the inclusion of the charging circuit 22 when the power is not interrupted. Aging of capacitors and other components.

The washing machine 100 of the present embodiment includes a water level detection unit 25 that detects the water level in the drum 2. The microcomputer 70 controls the auxiliary drain valve 17a when it determines that there is residual water in the drum 2 based on the detection value of the water level detection unit 25 during a power failure. drain. As a result, the auxiliary drain valve 17a is driven only when there is residual water, and is not driven otherwise, so unnecessary power consumption can be suppressed.

In the washing machine 100 of the present embodiment, when the microcomputer 70 determines that there is remaining water in the drum 2, the door lock device 4 is unlocked after controlling the auxiliary drain valve 17a to drain water. Therefore, it is effective for the case where the door 3 cannot be opened in the remaining water state, and the case where it is undesirable to open the door 3 to take out the clothes in the remaining water state.

The washing machine 100 of this embodiment includes a voltage monitoring unit 26 that monitors the voltage of the charging circuit 22. When the voltage monitored by the voltage monitoring unit 26 is lower than a predetermined threshold value, even when the auxiliary drain valve 17a is controlled to drain water. , The microcomputer 70 also prioritizes unlocking. Therefore, it is possible to unlock before the power storage amount is reduced and the excitation energy of the solenoid 4a disappears.

In the washing machine 100 of this embodiment, the drum 2 is assembled so as to surround the main shaft 11 extending in the horizontal direction. In particular, since such a washing machine 100 cannot open the door 3 in a state of remaining water, the sequence of the present embodiment in which the door 3 is opened after draining water is effective.

As mentioned above, although the embodiment of this invention was described, the specific structure of each part is not limited only to the above-mentioned embodiment.

In the above-mentioned embodiment, the main voltage conversion unit 21 is constituted by a DC-DC converter, and the auxiliary voltage conversion unit 24 is constituted by a voltage regulator, but it is not limited to this as long as voltage conversion can be performed, and suitable components can be used.

In the above embodiment, the main voltage conversion unit 21 outputs the first voltage 12V and the second voltage 5V, and the second voltage 5V is used as the control voltage VDD via the relay 23. On the other hand, it can also be configured as shown in FIG. 6 such that when the main voltage conversion unit 21 outputs only the first voltage of 12V, it will be equivalent to the output from the charging circuit 22 through the auxiliary voltage conversion unit 24 even in normal times. The voltage Vcap2 at the second voltage is used as the control voltage VDD to supply the microcomputer 70.

In the above-mentioned embodiment, the auxiliary voltage conversion unit 24 generates the voltage Vcap2 corresponding to the second voltage, and operates the relay 23 to supply the control voltage Vcap2 to the microcomputer 70 during a power failure. However, it can also be configured as shown in FIG. 7 to cancel the relay. A charging circuit 22a is also provided for the second voltage (DC5V) of the main voltage conversion unit 21 to store electricity, and the second voltage is output as a voltage Vcap2 corresponding to the control voltage.

In the above embodiment, the voltage Vcap1 output from the charging circuit 22 is supplied to the door lock device 4, the water supply control circuit 50, and the main drain control circuit 60 when the power is not interrupted. However, it can also be configured as shown in FIG. The DC 12V between the conversion unit 21 and the charging circuit 22 supplies power to the door lock device 4, the water supply control circuit 50, and the main drain control circuit 60.

In addition, in the above-mentioned embodiment, the washing machine 100 having the drum 4 capable of rotating about the main shaft 11 along the horizontal direction has been described, but the present invention can also be applied to the drum having the drum 4 capable of rotating about the main shaft inclined with respect to the horizontal direction. 4 washing machines. In addition, the present invention can also be applied to a vertical washing machine having a washing tub (rolling tub) that can rotate about a rotating shaft in a vertical direction.

In the above-mentioned embodiment, the door lock device 4 has the solenoid 4b as a driving device for driving the locking portion 4a, but the driving device is not limited to this. In the door lock device 4, for example, the locking portion 4a can be driven by a motor as a driving device.

Other structures can also be modified in various ways without departing from the technical spirit of the present invention.

Claims

A washing machine, characterized in that it has:

The roller is arranged in the box;

The door can be opened and closed on the box body;

The door lock device switches the door to a locked state or an unlocked state;

The water supply path has a water supply valve to supply water to the drum;

The main drain path has a main drain valve to drain the drum;

Auxiliary drain, with auxiliary drain valve to drain the remaining water in the drum;

A control unit, which controls the door lock device, the water supply valve, the main drain valve, and the auxiliary drain valve;

The main power supply circuit is connected to an external power source and supplies power to the door lock device, the water supply valve, the main drain valve, and the control unit;

A power storage unit that stores electric power supplied from the external power source; and

An auxiliary power supply circuit supplies the power of the power storage unit to the control unit, the door lock device, and the auxiliary drain valve during a power failure.
The washing machine according to claim 1, wherein:

The washing machine is configured to drive the door lock device, the water supply valve, the main drain valve, and the auxiliary drain valve based on a first voltage and drive the control unit based on a second voltage,

The power storage unit stores the first voltage,

The second voltage is generated by voltage conversion of the first voltage of the power storage unit.
The washing machine according to claim 1 or 2, characterized in that:

Equipped with a water level detection unit that detects the water level in the drum,

The control unit controls the auxiliary drain valve to drain water when it is determined that there is residual water in the drum based on the detection value of the water level detection unit during a power failure.
The washing machine according to claim 3, wherein:

When the control unit determines that there is remaining water in the drum, after controlling the auxiliary drain valve to drain water, unlock the door lock device.
The washing machine according to claim 4, wherein:

A voltage monitoring unit that monitors the voltage of the battery is provided. When the voltage monitored by the voltage monitoring unit is lower than a predetermined threshold value, the control unit is controlled even during the process of controlling the auxiliary drain valve to drain water. Prioritize unlocking.
The washing machine according to claim 4, wherein:

The rollers are assembled around a horizontal axis or an axis inclined with respect to the horizontal direction.