JP2008067764A - Washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a washing machine which can make the control circuit have a clock function without using a battery of a large capacity. <P>SOLUTION: Under a power source turned-on state that a power source relay 42 is turned on, a DC power source is supplied to an electric double-layer capacitor 50 from a main power source circuit 32, and a driving power source for performing a time counting process is supplied to a subsidiary control circuit 47 from the electric double-layer capacitor 50. Under a power source shutdown state that the power source relay 42 is turned off, if the electric double layer capacitor 50 is charged to a degree that the subsidiary control circuit 47 can be driven, the driving power source for performing the time counting process is supplied to the subsidiary control circuit 47 from the electric double-layer capacitor 50. At the time of abnormality in which the electric double-layer capacitor 50 has been discharged to a degree that the driving of the subsidiary control circuit 47 is impossible, the driving power source for performing the time counting process is supplied to the subsidiary control circuit 47 from a button battery 55. Therefore, at the time of emergency, the subsidiary control circuit 47 can be made to have the clock function by the button battery 55 of a small capacity. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a washing machine having a backup power source.

The washing machine supplies drive power to the control circuit from the commercial AC power supply through the power supply circuit when the commercial AC power is turned on, and supplies drive power from the backup power supply such as a button battery to the control circuit when the commercial AC power is turned off. There is a configuration one. This control circuit is composed mainly of a microcomputer, and has a clock function that measures the current time based on time measurement processing that measures time in each of the commercial AC power supply on and off states. ing.
JP-A-2-54759 Japanese Patent Laid-Open No. 2005-6804

  In the case of the washing machine described above, it is necessary to use a large-capacity button battery when trying to set the life of the button battery to be equal to or longer than the product life of the washing machine. Using a battery is practically difficult in terms of cost.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a washing machine capable of giving a clock function to a control circuit without using a large-capacity battery.

  The washing machine of the present invention is interposed between a power supply circuit that converts commercial AC power supply to DC power supply, a power supply path that supplies the power supply circuit to the commercial AC power supply, and is in an off state that opens the power supply path and A switch that can be switched to an ON state that closes the power supply path, a battery that can output DC power, and an electric double layer capacitor that charges the DC power that is converted by the power circuit when the switch is ON. In the on state of the switch, a time measuring process for measuring time is performed based on the fact that a DC power is supplied from the electric double layer capacitor. In the off state of the switch, any one of the electric double layer capacitor and the battery A control circuit that performs a timing process based on the fact that a DC power supply is given so that the electric double layer capacitor is given priority. It has a butterfly.

  When the commercial AC power source is turned on with the switch turned on, a DC power source is supplied from the commercial AC power source to the electric double layer capacitor through the power supply circuit, and a driving power source is provided from the electric double layer capacitor to the control circuit. A drive power supply for timing the electric double layer capacitor from the electric double layer capacitor to the control circuit when the switch is turned off and the electric double layer capacitor is charged to the extent that it can drive the control circuit. In the event of an emergency when the electric double layer capacitor is discharged to such an extent that it cannot drive the control circuit, a driving power supply is provided from the battery to the control circuit. For this reason, a clock function can be given to the control circuit with a battery having a small capacity to the extent that the control circuit can be driven in an emergency.

[Example 1]
As shown in FIG. 1, the outer box 1 is constituted by joining a bottom plate 2, a left side plate 3, a right side plate 4, a front plate 5, a top plate 6 and a rear plate 7 to each other. A through-hole entrance 8 is formed in 5. A door 9 is attached to the front plate 5, and the door 9 can be operated between a closed state in which the doorway 8 is closed and an open state in which the doorway 8 is opened.

  A water receiving tank is accommodated in the outer box 1. The water receiving tank has a bottomed cylindrical shape with a closed rear surface, and a washing motor 10 (see FIG. 2) is fixed to the rear plate of the water receiving tank. The washing motor 10 is a three-phase DC brushless motor, and the rotating shaft of the washing motor 10 protrudes into the water receiving tank. A drum is connected to the rotating shaft of the washing motor 10 so as to be positioned inside the water receiving tank. The drum has a bottomed cylindrical shape with a closed rear surface, and rotates integrally with the rotating shaft of the washing motor 10 based on the driving of the washing motor 10. The front surface of the drum is arranged behind the entrance / exit 8, and clothing is put into the drum from the outside through the entrance / exit 8 when the door 9 is open, and taken out from the drum through the entrance / exit 8 when the door 9 is open. The

  As shown in FIG. 1, a laterally long operation panel 11 is joined to the outer box 1 above the door 9, and the operation panel 11 includes a power switch 12, a reservation switch 13, a course switch 14, and a start. Each of the switch 15 and the stop switch 16 is mounted. The power switch 12 is electrically turned on when an operating force is applied, and self-resets to an electrical off state when the operating force is removed. A main control circuit 17 (see FIG. 2) mainly composed of a microcomputer is housed in the outer box 1, and each of the reservation switch 13 to the stop switch 16 has a main control as shown in FIG. The circuit 17 is connected. The main control circuit 17 has a CPU, a ROM, and a RAM. When it is determined that the reservation switch 13 has been operated, the reservation time is set according to the operation content of the reservation switch 13, and the course switch 14 is operated. When it is determined that the driving course is set according to the operation content of the course switch 14, when the start switch 15 is determined to be operated in the setting state of the driving course, the setting result of the driving course is executed, and the stop switch When it is judged that 16 is operated in the running state of the driving course, the driving course being executed is stopped.

  As shown in FIG. 3, a timer case 18 is housed inside the outer box 1 so as to be located behind the operation panel 11. The timer case 18 corresponds to a substrate container, and the contour shape of the timer case 18 is set to a horizontally long shape along the contour shape of the operation panel 11. The cross-sectional shape of the timer case 18 is as shown in FIG. The container has a front opening. A printed wiring board 19 is accommodated in the timer case 18. The printed wiring board 19 is supported on the bottom plate of the timer case 18 via a plurality of spacers, and a gap is formed between the printed wiring board 19 and the bottom plate of the timer case 18. The printed wiring board 19 corresponds to a board.

  As shown in FIG. 4, a plurality of engagement holes 20 are formed in the printed wiring board 19, and the legs 22 of the LCD holder 21 are inserted into the engagement holes 20 from the front. A claw portion 23 is formed at the tip of each leg 22, and each leg 22 is disengaged forward from the engagement hole 20 based on the engagement of the claw portion 23 with the edge of the engagement hole 20. Is prevented. The LCD holder 21 is made of synthetic resin, and the cross-sectional shape of the LCD holder 21 is set to a container shape with an open front. The contour shape of the LCD holder 21 is a horizontally long shape as shown in FIG. It is set to a rectangular shape. The LCD holder 21 corresponds to a holding member.

  As shown in FIG. 4, a sealing portion 24 is formed inside the timer case 18. This sealing portion 24 is formed by injecting potting resin such as urethane resin into the timer case 18, and each of the front surface and the rear surface of the printed wiring board 19 is sealed by the sealing portion 24. The LCD holder 21 is fixed to the printed wiring board 19 based on the latter half of each leg 22 being embedded in the sealing portion 24. A capacitor holder 25 is joined to the front surface of the printed wiring board 19 so as to be positioned in a gap between the LCD holder 21 and the printed wiring board 19. The capacitor holder 25 has a container shape with an open front surface, and the sealing portion 24 is not formed in the internal space of the capacitor holder 25. The capacitor holder 25 corresponds to a capacitor container.

  As shown in FIG. 4, a liquid crystal display 26 is accommodated inside the LCD holder 21. The liquid crystal display 26 corresponds to a display, and includes a reflection sheet 27, a light guide plate 28, a prism sheet 29, an LCD cell 30, and a backlight 31. As shown in FIG. 3, the backlight 31 is disposed on the side of the reflection sheet 27 to the LCD cell 30, and projects light toward the side reflection sheet 27. The reflection sheet 27 reflects the light projected from the backlight 31 forward. The light guide plate 28 planarizes the light reflected from the reflection sheet 27 and projects it onto the prism sheet 29. The prism sheet 29 The light projected from the light guide plate 28 is linearly polarized and projected onto the LCD cell 30. The LCD cell 30 has a liquid crystal layer sandwiched between two glass plates, and an image is displayed on the LCD cell 30 by controlling the arrangement of the liquid crystal layer for each pixel. As shown in FIG. 1, the LCD cell 30 is exposed forward through the through hole of the operation panel 11, and the display content of the LCD cell 30 can be visually recognized by the user in front.

  As shown in FIG. 2, a main power supply circuit 32 corresponding to a power supply circuit is connected to the commercial AC power supply. The main power supply circuit 32 includes a rectifier circuit 33, two smoothing capacitors 34, a DC / DC converter 35, and smoothing capacitors 36 to 39. The rectifier circuit 33, two smoothing capacitors 34, and a DC / DC converter 35 are provided. Each of the smoothing capacitors 36 to 39 is electrically connected to the printed wiring board 19 in the timer case 18 and is resin-sealed by the sealing portion 24 in the timer case 18.

  The rectifier circuit 33 converts commercial AC power into DC power, and the two smoothing capacitors 34 generate double voltage DC power based on smoothing the DC power output from the rectifier 33. Each of the two smoothing capacitors 34 is composed of an electrolytic capacitor, and the DC / DC converter 35 has a level based on stepping down the double voltage DC power output from the two smoothing capacitors 34. Different DC power sources are generated. Each of the smoothing capacitors 36 to 39 is composed of an electrolytic capacitor, and the smoothing capacitor 36 generates a drive power supply V1 (15V) based on smoothing the DC power output from the DC / DC converter 35, The smoothing capacitor 37 generates a driving power source V2 (5.7V) based on smoothing the DC power source output from the DC / DC converter 35, and the smoothing capacitor 38 receives the DC power source output from the DC / DC converter 35. A drive power supply V3 (5V) is generated based on the smoothing, and the smoothing capacitor 39 drives the drive power supply V4 (5V) for the main control circuit 17 based on smoothing the DC power output from the DC / DC converter 35. Is generated.

  As shown in FIG. 2, a power switch 12 is interposed between the commercial AC power source and the rectifier circuit 33. When the user operates the power switch 12, the power switch 12 is switched from the off state to the on state. Based on this, commercial AC power is supplied to the rectifier circuit 33, and generation of each of the drive power sources V1 to V4 is started. In the operating state of the power switch 12, the drive power source V4 is supplied from the main power circuit 32 to the main control circuit 17, and the main control circuit 17 is activated. The main control circuit 17 is connected to the base terminal of the transistor 40 with a resistor, and the main control circuit 17 turns on the transistor 40 based on the output of the drive signal to the base terminal of the transistor 40 immediately after startup.

  The base terminal of a transistor 41 with a resistor is connected to the transistor 40. When the transistor 40 is turned on, the transistor 41 is turned on based on the fact that the drive power supply V3 is supplied from the main power supply circuit 32 to the base terminal of the transistor 41. The A coil 43 of a power supply relay 42 is connected to the transistor 41. When the transistor 41 is turned on, the coil 43 is turned on based on the drive power supply V1 being supplied from the main power supply circuit 32 to the coil 43. The contact 44 of the power supply relay 42 is interposed in the power supply path 45, and when the coil 43 is turned on, the power supply path 45 is changed from the open state to the closed state based on switching of the contact 44 from the off state to the on state. Switch. The power supply path 45 supplies commercial AC power to the rectifier circuit 33 of the main power circuit 32, and the contact 44 of the power relay 42 is interposed between the commercial AC power source and the rectifier circuit 33 in parallel with the power switch 12. Has been. That is, the power supply relay 42 corresponds to a switch that can be switched between an OFF state in which the power supply path 45 is opened and an ON state in which the power supply path 45 is closed, and in a state where the user releases the power switch 12. Since the commercial AC power is supplied to the main power supply circuit 32 through the contact 44 of the power relay 42, each of the drive power supplies V1 to V4 is continuously generated from the operation state of the power switch 12.

  As shown in FIG. 2, an inverter circuit 46 is connected to the main power supply circuit 32, and the washing motor 10 is connected to the inverter circuit 46. The inverter circuit 46 converts the double voltage DC power generated by the main power circuit 32 into a three-phase AC power. The washing motor 10 is based on the fact that the inverter circuit 46 is supplied with the three-phase AC power. To drive. A main control circuit 17 is connected to the inverter circuit 46, and the main control circuit 17 rotates the washing motor 10 while controlling the speed based on driving control of the inverter circuit 46. That is, the main control circuit 17 rotates the drum based on driving the washing motor 10 to wash the laundry in the drum in a state where the detergent is put in, and the laundry in the drum in a state where the detergent is not put in. A washing operation including a washing and rinsing step and a dehydration step of removing moisture from the laundry in the drum by centrifugal force is executed according to the setting result of the operation course, and corresponds to an operation control circuit.

  A sub control circuit 47 corresponding to each of the control circuit and the display control circuit is housed in the outer case 1, and the liquid crystal display 26 is connected to the sub control circuit 47. The sub-control circuit 47 is mainly composed of a microcomputer and has a CPU, a ROM, and a RAM. The sub control circuit 47 controls the display content of the liquid crystal display 26 and is connected to the main control circuit 17. The main control circuit 17 transmits a display command to the sub control circuit 47, and the sub control circuit 47 displays an image corresponding to the reception result of the display command on the liquid crystal display 26. The main control circuit 17 transmits a mode switching command to the sub control circuit 47. When the sub control circuit 47 receives the mode switching command in the setting state of the low power consumption mode (for example, sleep mode), the low control power consumption mode is set. Is switched to the normal power consumption mode, and when the mode switching command is received in the setting state of the normal power consumption mode, the normal power consumption mode is switched to the low power consumption mode. This low power consumption mode is a mode that operates with less power consumption than the normal power consumption mode. In the low power consumption mode, the function of the sub-control circuit 47 is limited compared to the normal power consumption mode.

  As shown in FIG. 2, a sub power circuit 48 is connected to the sub control circuit 47. The sub power circuit 48 supplies driving power to the sub control circuit 47 in a commercial AC power supply state and a commercial AC power supply cut-off state. The sub control circuit 47 includes a commercial AC power supply state and a commercial AC power source. Operates in each power-off state. The sub power circuit 48 includes a smoothing capacitor 49, two electric double layer capacitors 50, diodes 51 to 53, a resistor 54, and a button battery 55. The smoothing capacitor 49, two electric double layer capacitors 50, and a diode. Each of 51 to 53 and the resistor 54 are electrically connected to the printed wiring board 19 in the timer case 18, and each of the remaining smoothing capacitor 49 except the two electric double layer capacitors 50, the diodes 51 to 53, and the resistor 54. Is sealed with a sealing portion 24 in the timer case 18.

  The smoothing capacitor 49 is composed of an electrolytic capacitor, and generates a drive power supply V2 (5.7 V) based on smoothing the DC power output from the DC / DC converter 35 with the commercial AC power applied. . Each of the electric double layer capacitors 50 is for charging the drive power source V2 output from the smoothing capacitor 49. These electric double layer capacitors 50 provide driving power to the sub-control circuit 47 when the voltage of the electric double layer capacitors 50 (rated 5V) is higher than the voltage of the button battery 55 (rated 3V). 51 prevents the drive power of the sub-control circuit 47 from flowing back from the electric double layer capacitor 50 to the smoothing capacitor 49, and the diode 53 prevents the drive power of the sub-control circuit 47 from the both electric double layer capacitor 50 to the button battery 55. Prevent it from flowing.

  As shown in FIG. 4, each of the electric double layer capacitors 50 is housed in an inverted state in the capacitor holder 25, and each terminal 56 of both electric double layer capacitors 50 is, as shown in FIG. Overcoming the wall of the capacitor holder 25 and connected to the printed circuit board 19, the two electric double layer capacitors 50 are not resin-sealed by the sealing portion 24 in the timer case 18. As shown in FIG. 2, the button battery 55 supplies drive power to the sub-control circuit 47 when the voltage of both electric double layer capacitors 50 is lower than the voltage of the button battery 55. The electric double layer capacitor 50 is prevented from being charged from the button battery 55. The button battery 55 corresponds to a battery and a primary battery.

Next, the operation of the above configuration will be described.
Immediately after purchasing a product for which the user has never operated the power switch 12, the electric double layer capacitors 50 of the sub power circuit 48 are not charged at all. In this initial state, driving power is supplied from the button battery 55 of the sub power circuit 48 to the sub control circuit 47, and the sub control circuit 47 operates in the low power consumption mode based on the driving power from the button battery 55. In this initial state, the sub-control circuit 47 performs a time measurement process. This timing process is a process of updating the counter based on a clock signal output from the clock circuit at a constant time interval, and the counter functions as a clock indicating the current time. This clock circuit is built in the sub-control circuit 47. In the low power consumption mode, the clock function that the sub-control circuit 47 measures the current time is enabled, and in the normal power consumption mode, the sub-control circuit 47 displays the liquid crystal display. Both the display function for displaying video on the device 26 and the clock function are activated.

  When the user operates the power switch 12, commercial AC power is supplied to the main power circuit 32, and drive power V 4 is supplied from the main power circuit 32 to the main control circuit 17. The main control circuit 17 is activated based on the supply of the drive power V4 from the main power circuit 32, and turns on the power relay 42 based on outputting a drive signal to the transistor 40 in the power-on process immediately after the activation. Based on the output of the mode switching command to the sub control circuit 47, the sub control circuit 47 is switched from the low power consumption mode to the normal power consumption mode. When the power supply relay 42 is turned on, the main power supply circuit 32 supplies the drive power supply V2 to the sub power supply circuit 48, and the both electric double layer capacitors 50 of the sub power supply circuit 48 supply drive power to the sub control circuit 47. Then, the sub-control circuit 47 continues the timing process.

  When the main control circuit 17 determines that the reservation switch 13 is operated in the power-on state, the main control circuit 17 sets a reservation time according to the operation content of the reservation switch 13. Then, a display command is set according to the reservation time setting result, and the display command setting result is transmitted to the sub-control circuit 47. This reserved time refers to the end time of the washing operation. When the sub control circuit 47 receives a display command from the main control circuit 17, the sub control circuit 47 displays an image corresponding to the display command reception result on the liquid crystal display 26, The user is notified of the setting result of the reservation time.

  When the main control circuit 17 determines that the course switch 14 is operated in the power-on state, the main control circuit 17 sets a driving course according to the operation content of the course switch 14. This driving course is set based on the course switch 14 being operated in the power-on state regardless of whether or not the reserved time is set. The main control circuit 17 operates when the driving course is set. A display command corresponding to the course setting result is set, and the display command setting result is transmitted to the sub-control circuit 47. Then, the sub control circuit 47 displays an image corresponding to the reception result of the display command on the liquid crystal display 26 and notifies the user of the setting result of the driving course.

  When the main control circuit 17 determines that the start switch 15 has been operated in a state in which the reserved time is not set, the main control circuit 17 outputs the drive signal corresponding to the setting result of the driving course to the inverter circuit 46, so that the drum is set to the driving course. The rotating operation is performed according to the setting result, and the setting result of the driving course is immediately executed. When the setting result of the driving course is completed and when it is determined that the stop switch 16 is operated during the driving course, the sub control is performed based on the transmission of the mode switching command to the sub control circuit 47. The circuit 47 is switched from the normal power consumption mode to the low power consumption mode, and the commercial AC power supply is shut off based on turning off the power supply relay 42 (auto power off). In this power cut-off state, drive power is supplied from the electric double layer capacitors 50 of the sub power supply circuit 48 to the sub control circuit 47, and the sub control circuit 47 continues the timing process. When the voltage of both electric double layer capacitors 50 is lower than the voltage of the button battery 55 in the power-off state, the driving power is supplied from the button battery 55 to the sub-control circuit 47, and the sub-control circuit 47 continues the timing process. .

  When the main control circuit 17 determines that the start switch 15 is operated in the reservation time setting state, the main control circuit 17 switches the reservation mode from the off state to the on state. In the ON state of the reservation mode, the main control circuit 17 disables the stop switch 16 and continues the power-on state without turning off the power relay 42 even when it is determined that the stop switch 16 has been operated. To do.

  When the main control circuit 17 switches the reservation mode to the on state, the main control circuit 17 calculates the operation time based on the setting result of the reservation time. This operation time is obtained by subtracting the time required for executing the setting result of the driving course from the setting result of the reserved time, and the main control circuit 17 calculates the sub control circuit 47 when the driving time is calculated. The calculation result of the operation time is transmitted to. Then, the sub-control circuit 47 records the reception result of the operation time in the RAM, and compares the update result of the counter with the record result of the operation time. In this state, drive power is supplied to the sub control circuit 47 from both electric double layer capacitors 50 of the sub power circuit 48, and the sub control circuit 47 determines that the counter update result has reached the operation time recording result. Sometimes a start command is transmitted to the main control circuit 17.

  When the main control circuit 17 receives the start command from the sub-control circuit 47, the main control circuit 17 executes the driving course setting result based on outputting a driving signal corresponding to the driving course setting result to the inverter circuit 46. When the setting result of the driving course is completed or when it is determined that the stop switch 16 is operated during the driving course, the sub control is performed based on the transmission of the mode switching command to the sub control circuit 47. The commercial AC power supply is shut off based on switching the circuit 47 to the low power consumption mode and turning off the power supply relay 42.

According to the said Example 1, there exists the following effect.
In a power-on state in which the power supply relay 42 is turned on, a DC power source is supplied from the commercial AC power source to the electric double layer capacitor 50 through the main power source circuit 32, and a driving power source for performing a time measurement process from the electric double layer capacitor 50 to the sub control circuit 47. Gave. When the power supply relay 42 is turned off and the electric double layer capacitor 50 is charged to such an extent that the sub control circuit 47 can be driven, the electric double layer capacitor 50 performs time measurement processing on the sub control circuit 47. In the event of an emergency that the electric double layer capacitor 50 has been discharged to such an extent that it cannot drive the sub-control circuit 47, the button battery 55 provides the sub-control circuit 47 with a drive power supply for timing. It was. For this reason, the sub control circuit 47 can be provided with a clock function with a button battery 55 having a capacity that is small enough to drive the sub control circuit 47 in an emergency. It becomes possible to perform a reserved driving to be finished.

  Since the electric double layer capacitor 50 is accommodated in the gap between the printed wiring board 19 and the timer case 18, the electric double layer capacitor 50 does not get in the way when the timer case 18 is disposed behind the operation panel 11. For this reason, since the degree of freedom of the layout of the timer case 18 is improved, the degree of freedom of the layout of the liquid crystal display 26 is also increased. Moreover, since the electric double layer capacitor 50 is disposed in an inverted state, the electric double layer capacitor 50 can be easily accommodated in the gap between the printed wiring board 19 and the timer case 18.

  Since the electric double layer capacitor 50 is accommodated in the capacitor holder 25 and the electric double layer capacitor 50 is prevented from being resin-sealed by the sealing portion 24 in the timer case 18, the explosion-proof valve of the electric double layer capacitor 50 is provided. The sealing unit 24 prevents the functioning from being blocked. For this reason, when the internal pressure of the electric double layer capacitor 50 is abnormally increased, the internal pressure of the electric double layer capacitor 50 can be surely released through the explosion-proof valve, so that the safety can be prevented from being impaired.

  Since each of the electric double layer capacitors 50 is charged from the smoothing capacitor 49 through the diode 51, it is possible to prevent a current from flowing backward from the electric double layer capacitors 50 to the main power supply circuit 32 side. A diode 52 is interposed between the electric double layer capacitor 50 and the button battery 55. For this reason, each of the electric double layer capacitors 50 is not charged from the button battery 55 when the voltage of the electric double layer capacitor 50 is lower than the voltage of the button battery 55. Can be prevented from being wasted.

In the first embodiment, a secondary battery may be used instead of the primary battery 55.
In the first embodiment, one electric double layer capacitor 50 may be used instead of the two electric double layer capacitors 50.

  In the first embodiment, a drying mechanism for drying the laundry in the drum may be provided.

Perspective view showing appearance of washing machine Diagram showing electrical configuration Perspective view showing appearance of timer case Sectional view along the X-ray of FIG.

Explanation of symbols

  18 is a timer case (substrate container), 19 is a printed wiring board (substrate), 21 is an LCD holder (holding member), 24 is a sealing portion, 25 is a capacitor holder (capacitor container), and 26 is a liquid crystal display (display). ), 32 is a main power circuit (power circuit), 42 is a power relay (switch), 45 is a power supply path, 47 is a sub-control circuit (control circuit), 50 is an electric double layer capacitor, and 55 is a button battery (battery). Show.

Claims (3)

A power supply circuit for converting commercial AC power into DC power;
A switch that is interposed in a power supply path that supplies commercial AC power to the power supply circuit, and is switched between an off state that opens the power supply path and an on state that closes the power supply path;
A battery capable of outputting a DC power supply;
An electric double layer capacitor that charges a DC power source that is converted by the power source circuit when the switch is on;
In the ON state of the switch, a time measuring process for measuring time is performed based on the fact that DC power is supplied from the electric double layer capacitor. In the OFF state of the switch, any one of the electric double layer capacitor and the battery A washing machine comprising: a control circuit that performs a timing process based on the fact that a DC power supply is applied so that the electric double layer capacitor has priority. A substrate to which the electric double layer capacitor is connected;
The substrate is disposed opposite to the substrate via a gap, and includes a holding member that holds the display.
The washing machine according to claim 1, wherein the electric double layer capacitor is accommodated in a gap between the substrate and the holding member. A substrate to which the electric double layer capacitor is connected;
A capacitor container provided on the substrate and containing the electric double layer capacitor;
A substrate container in which the substrate is stored together with the capacitor container;
2. The washing machine according to claim 1, further comprising: a sealing portion that is provided in the substrate container and is sealed with resin while leaving the internal space of the capacitor container.

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