JP2013153928A - Washing and drying machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce consumption of idling current for a control unit corresponding to a washing machine load having a time not to be used in execution of a washing and drying operation of washing, rinsing, dewatering and drying, and in the time.SOLUTION: A washing and drying machine comprises multiple washing machine loads to execute a washing and drying operation of washing, rinsing, dewatering and drying, and a control device having multiple control units controlling these washing machine loads and making them execute the washing and drying operation. The control device arranges a time to shut off a power source supply for the control unit corresponding to the washing machine load having the time not to be used in execution of the washing and drying operation, and in the time.

Description

  Embodiments described herein relate generally to a washing dryer.

  2. Description of the Related Art Conventionally, a laundry dryer, for example, a drum-type laundry dryer, has been equipped with a control device for performing washing, rinsing, dewatering and drying washing and drying operations, and the control device includes washing, rinsing, dewatering and drying. Controls a microcomputer (main microcomputer) that controls a washing machine motor that rotates and drives a drum that is a washing and dewatering tank, and a compressor motor and a fan motor of a heat pump that supplies hot air into the drum during drying And a microcomputer (sub-microcomputer) which is a control unit for transmitting and receiving signals by serial communication between the two microcomputers, and the sub-microcomputer receives commands from the main microcomputer. Control for drying based on It is adapted to start.

  In the above configuration, since the control microcomputer circuit is supplied with the control DC power source from the beginning of the washing and drying operation, the washing machine for drying is used during washing, rinsing and dewatering washing operations. Even though the compressor motor and fan motor, which are the loads, are not used, a control DC power supply is supplied to the sub-microcomputer for controlling them, and a dark current flows through the sub-microcomputer and is consumed. There was a problem.

JP 2006-334203 A

    Therefore, a washing and drying machine capable of reducing the consumption of dark current during the period for the control unit corresponding to the washing machine load having a period not used during execution of the washing and drying operation of washing, rinsing, dehydration and drying. provide.

  The laundry dryer according to the present embodiment includes a plurality of washing machine loads for executing washing, rinsing, dehydrating and drying washing and drying operations, and a plurality of washing machine drying operations executed by controlling these washing machine loads. A control unit having a control unit, wherein the control unit has a period during which the power supply is shut off during the period with respect to the control unit corresponding to the washing machine load having a period not used during the execution of the washing and drying operation. It is provided.

The figure which shows schematically the drive control system of each motor in the drum type washing-drying machine of 1st Embodiment. Longitudinal side view showing the configuration of a drum-type washing and drying machine Diagram showing the configuration of the heat pump Block diagram showing a configuration including a clock pulse generation circuit of a microcomputer The figure which shows the presence or absence of use of each motor in each process of washing-drying operation FIG. 1 equivalent diagram showing the second embodiment 4 equivalent figure FIG. 1 equivalent view showing the third embodiment 4 equivalent figure FIG. 1 equivalent view showing the fourth embodiment Action diagram

  Hereinafter, a plurality of embodiments applied to a drum type washing and drying machine will be described with reference to the drawings. In addition, in each embodiment, the same code | symbol is attached | subjected to the substantially same component, and description is abbreviate | omitted.

(First embodiment)
Hereinafter, a first embodiment will be described with reference to FIGS. 1 to 5.
First, referring to FIG. The outer box 1 has a hollow shape including a front plate, a rear plate, a left side plate, a right side plate, a bottom plate, and a top plate. A front plate of the outer box 1 is formed with a through-hole shaped entrance 2. A door 3 is attached to the front plate of the outer box 1. The door 3 can be operated by the user between the closed state and the open state from the front. The door 2 is closed when the door 3 is closed, and the door 2 is opened when the door 3 is open. A water receiving tank 4 is elastically supported by an elastic support mechanism 11 inside the outer box 1. The water receiving tank 4 has a cylindrical shape with a closed rear surface, and is disposed in an inclined state in which the axial center line CL descends from the front toward the rear. The front surface of the water receiving tank 4 is open. When the door 3 is closed, the door 3 closes the front surface of the water receiving tank 4 in an airtight state.

  A washing machine motor 5 serving as a washing machine load is fixed to the rear plate of the water receiving tank 4 and located outside the water receiving tank 4. This washing machine motor 5 is a DC brushless motor capable of speed control, and its rotating shaft 6 projects into the water receiving tank 4. The rotating shaft 6 is disposed so as to overlap the axial center line CL of the water receiving tub 4, and a drum 7 serving as a washing tub and dewatering tub is fixed to the rotating shaft 6. . The drum 7 has a cylindrical shape with a closed rear surface, and rotates integrally with the rotary shaft 6 in the operating state of the washing machine motor 5. The front surface of the drum 7 faces the inlet / outlet 2 from the rear via the front surface of the water receiving tank 4. Inside the drum 7, the door 2 is opened and the front of the inlet / outlet 2, the front of the water receiving tank 4 and the drum 7 are opened from the front. Laundry is put in and out through the front.

  A plurality of through holes 8 are formed in the drum 7, and the internal space of the drum 7 communicates with the internal space of the water receiving tank 4 through each of the plurality of through holes 8. A plurality of baffles 9 are fixed to the drum 7. Each of the plurality of baffles 9 moves in the circumferential direction around the axis line CL as the drum 7 rotates, and the laundry in the drum 7 is caught by each of the plurality of baffles 9. While moving in the circumferential direction, it is stirred by dropping by gravity.

  A water supply valve (solenoid valve) 10 as a washing machine load is fixed inside the outer box 1. The inlet of the water supply valve 10 is connected to a tap faucet (not shown), and the outlet is connected to a water injection case 12. When the water supply valve 10 is opened by energization, tap water is injected into the water injection case 12 through the water supply valve 10. When the water supply valve 10 is closed due to power interruption, tap water is not injected into the water injection case 12. The water injection case 12 is fixed inside the outer box 1 at a position higher than the water receiving tank 4 and has a cylindrical water inlet 13. The water injection port 13 is inserted into the water receiving tank 4, and the tap water injected from the water supply valve 10 into the water injection case 12 is injected into the water receiving tank 4 from the water injection port 13.

  An upper end of a drain pipe 14 is connected to the water receiving tank 4 at the bottom, and a drain valve (electromagnetic valve) 15 serving as a washing machine load is interposed in the drain pipe 14. In the closed state due to the disconnection of the drain valve 15, the tap water injected into the water receiving tank 4 from the water inlet 13 is stored in the water receiving tank 4, and in the open state due to energization of the drain valve 15, The tap water is discharged to the outside of the water receiving tank 4 through the drain pipe 14.

  A main duct 17 is fixed to the bottom plate of the outer box 1 below the water receiving tank 4. The main duct 17 has a cylindrical shape directed in the front-rear direction. A cylindrical intake port 16 is formed at the front end portion of the main duct 17, and the lower end portion of the front duct 18 is formed at the intake port 16. It is connected. The front duct 18 has a cylindrical shape directed in the vertical direction, and the upper end of the front duct 18 is connected to the internal space of the water receiving tank 4 at the front end of the water receiving tank 4. A fan casing 19 is fixed to the rear end portion of the main duct 17. The fan casing 19 has a through-hole-like intake port 20 and a cylindrical exhaust port 21, and the internal space of the fan casing 19 communicates with the internal space of the main duct 17 through the intake port 20.

  A fan motor 22 that is located outside the fan casing 19 and is a load on the washing machine is fixed to the fan casing 19. The fan motor 22 has a rotating shaft 23 protruding into the fan casing 19, and a fan 24 is fixed to the rotating shaft 23 so as to be located inside the fan casing 19. The fan 24 is a centrifugal type that sucks air from the axial direction and discharges it in the radial direction. The air inlet 20 of the fan casing 19 faces the fan 24 from the axial direction of the fan 24, and the air outlet 21 of the fan casing 19. Faces the fan 24 from the radial direction of the fan 24.

  A lower end portion of the rear duct 25 is connected to the exhaust port 21 of the fan casing 19. The rear duct 25 has a cylindrical shape oriented in the vertical direction, and the upper end of the rear duct 25 is connected to the internal space of the water receiving tank 4 at the rear end of the water receiving tank 4. The rear duct 25, the fan casing 19, the main duct 17, the front duct 18, and the water receiving tank 4 constitute an annular circulation duct 26 having the internal space of the water receiving tank 4 as a start point and an end point, respectively. When the fan motor 22 is operated in the closed state, air in the water receiving tank 4 passes from the front duct 18 through the main duct 17 into the fan casing 19 based on the rotation of the fan 24 in a certain direction. The air is sucked and returned from the fan casing 19 to the water receiving tank 4 through the rear duct 25.

  A compressor (compressor) 27 is fixed inside the outer box 1. The compressor 27 is disposed outside the circulation duct 26 and has a discharge port for discharging the refrigerant and a suction port for sucking the refrigerant. The compressor 27 is driven by a compressor motor (hereinafter referred to as a “comp motor”) 28 (see FIG. 1) as a washing machine load, and the compressor motor 28 is constituted by a DC brushless motor capable of speed control.

  A condenser (condenser) 29 is fixed inside the main duct 17. The condenser 29 heats air and is configured by fixing each of a plurality of plate-like heating fins 31 in contact with the outer peripheral surface of one refrigerant pipe 30 that bends in a meandering manner. . The refrigerant pipe 30 of the condenser 29 is connected to the outlet of the compressor 27, and the refrigerant discharged from the outlet of the compressor 27 flows into the refrigerant pipe 30 of the condenser 29 when the compressor motor 28 is operating.

  As shown in FIG. 3, a capillary tube (decompressor) 32 is fixed inside the outer box 1. The capillary tube 32 is connected to the refrigerant pipe 30 of the condenser 29 and is disposed outside the circulation duct 26. The capillary tube 32 restricts the flow of the refrigerant on the downstream side of the condenser 29, and is composed of a single pipe. An evaporator (evaporator) 33 is fixed inside the main duct 17. The evaporator 33 cools the air and is disposed upstream of the condenser 29 in the air flow.

  FIG. 1 schematically shows a drive control system for the washing machine motor 5, the fan motor 22, and the compressor motor 28. The inverter circuit 34 is configured by connecting six IGBTs (switching elements) 35a to 35f in a three-phase bridge, and flywheel diodes 36a to 36f are connected between collectors and emitters of the IGBTs 35a to 35f. Yes. Each phase output terminal of the inverter circuit 34 is connected to each of the three-phase windings connected in a star connection of the washing machine motor 5.

  In the inverter circuit 34, the emitters of the IGBTs 35d, 35e, and 35f on the lower arm side are connected to the ground through shunt resistors 37u, 37v, and 37w. The common connection point between the emitters of the IGBTs 35d, 35e, and 35f and the shunt resistors 37u, 37v, and 37w is connected to the input terminal of the control device 42A.

  An inverter circuit 38 and a shunt resistor 39 (u, v, w) configured similarly are arranged for the fan motor 22, and an inverter circuit 40 and a shunt resistor 41 (u) are arranged for the comp motor 28. , V, w) are arranged. Control of the inverter circuits 38 and 40 is performed by the control device 42B, and the control devices 42A and 42B are capable of bidirectional communication by serial communication.

  A drive power supply circuit 43 is connected to the input side of the inverter circuits 34, 38, 40. The drive power supply circuit 43 has a full-wave rectifier circuit 45 in which an AC input terminal is connected to one side via a reactor 44 with respect to a commercial power supply of alternating current (AC) 100V. The full-wave rectifier circuit 45 is configured by a diode bridge, and two capacitors 46 a and 46 b connected in series are connected between the DC output terminals of the full-wave rectifier circuit 45. A common connection point of the capacitors 46 a and 46 b is connected to the other side of the AC input terminal of the full-wave rectifier circuit 45. The drive power supply circuit 43 performs double voltage full-wave rectification on the commercial power supply voltage of AC100V, and supplies a direct current (DC) voltage of about 280V to the inverter circuits 34, 38 and 40 as a drive DC power supply voltage.

  Another full-wave rectifier circuit 47, which is also formed of a diode bridge, is connected in parallel to the AC input terminal of the full-wave rectifier circuit 45. Between the DC output terminals of the full-wave rectifier circuit 47, an IGBT 48 is connected. Is connected. The control device 42B performs on / off control of the IGBT 48. That is, the control device 42B detects the commercial power supply voltage, detects the current with the current sensor 68 as will be described later, and controls the IGBT 48 to turn on and off so as to follow the voltage to improve the power factor. It has become.

  A series circuit of resistors 49a and 49b and a series circuit of resistors 50a and 50b are connected between the input terminals of the inverter circuits 34 and 38, respectively. The common connection point is connected to the input terminals of the control devices 42A and 42B. It is connected. The control devices 42A and 42B detect the drive DC power supply voltage input to the inverter circuits 34 and 38 by referring to the voltages at the respective common connection points.

  The control power supply circuit 51 is composed of, for example, a step-down chopper, and the drive DC power supply of the drive power supply circuit 43 is supplied to the input side thereof. The control power supply circuit 51 steps down the drive DC power supply voltage to generate a DC15V control DC power supply and a DC5V control DC power supply and supply them to the control device 42A. Further, the control DC power supply of DC15V and the control DC power supply of DC5V of the control power supply circuit 51 are supplied to the control device 42B via the power cutoff circuit 52. Then, when a power cutoff command is given from the control device 42A, the power cutoff circuit 52 cuts off the supply of DC 15V control DC power and DC 5V control DC power to the control device 42B. The power shutoff circuit 52 cancels the power shutoff when a shutoff release command is given from the control device 42A.

  The control device 42A includes a microcomputer (main microcomputer) 53A as a control unit, a gate driver 54A, and an I / O interface 55A, and the control device 42B includes a microcomputer (sub-computer) as a control unit. A microcomputer 53B and a gate driver 54B. That is, the control device 42 (A, B) has a plurality of two microcomputers (hereinafter referred to as microcomputers) 53A, 53B. The microcomputers 53A and 53B operate with a DC 5V control DC power supply, and the gate drivers 54A and 54B and the I / O interface 55A operate with a DC 15V control DC power supply.

  As shown in FIG. 4, the microcomputer 53 </ b> A of the control device 42 </ b> A includes a well-known CPU 56, ROM 57, and RAM 58 and a clock pulse generation circuit 59. The clock pulse generation circuit 59 will be described below. The oscillation circuit 60 is connected to an oscillator (eg, a ceramic oscillator) 61 that oscillates at, for example, 8 MHz on the input side, and generates and outputs an 8 MHz rectangular wave clock pulse by an oscillation operation. The multiplication circuit 62 multiplies the clock pulse from the oscillation circuit 60 by, for example, 8 times to generate and output a 64 MHz clock pulse, which becomes a CPU clock pulse.

  The clock pulse from the multiplier circuit 62 is given to the frequency divider circuit 63 and the selector 64. The frequency divider circuit 63 divides the clock pulse from the frequency multiplier circuit 62 into two and divides it into four and supplies it to the selector 64. The selector 64 receives a select signal (external bus clock select signal) from the CPU 56, selects a clock pulse having a frequency corresponding to the speed of the circuit operation to operate a circuit other than the CPU 56, and selects an external bus clock pulse. Output as. The microcomputer 53B of the control device 42B has the same configuration as the microcomputer 53A.

  The microcomputer 53A (CPU 56) of the control device 42A gives a gate signal to the drive circuit 65 via the gate driver 54A in the washing / drying operation to open the water supply valve 10 or the drain valve 15. An operation panel 66 is connected to the control device 42A. The operation panel 66 is disposed on the upper part of the front plate of the outer box 1 (see FIG. 2), and is provided with various operation units and a plurality of display units (not shown). The microcomputer 53A exchanges signals with the operation unit and display unit of the operation panel 66 via the I / O interface 55A.

  For the washing machine motor 5, in order to detect the rotor position, a position sensor 67 constituted by, for example, a Hall IC is arranged, and a sensor signal output from the position sensor 67 is given to the control device 42A. It is done. Further, a current sensor 68 made of, for example, a current transformer (CT) is inserted between the commercial power supply and the reactor 44, and a sensor signal output from the current sensor 68 is given to the control device 42B.

  The control devices 42A and 42B detect currents flowing through the phase windings of the motors 5, 22, and 28, and estimate the phase θ and the rotational angular velocity ω of the secondary rotating magnetic field based on the current values. The excitation current component Id and the torque current component Iq are obtained by performing orthogonal coordinate transformation and dq (direct-quadrature) coordinate transformation of the three-phase current. Then, when a speed command is given from the outside, the control devices 42A and 42B generate current commands Idref and Iqref based on the estimated phase θ, rotational angular velocity ω, and current components Id and Iq, and generate the voltage commands Vd and Vq. When converted to, rectangular coordinate transformation and three-phase coordinate transformation are performed. Eventually, a drive signal is generated as a PWM signal, which is supplied to the gates of the IGBTs of the inverter circuits 34, 38, and 40 via the gate drivers 54A and 54B, and the phase windings of the motors 5, 22, and 28, respectively. Is energized.

  Next, the operation of the first embodiment will be described with reference to FIG. FIG. 5 is a diagram showing whether each motor is used (“◯”) or not (“×”)) in a series of washing and drying operations of the drum type washing and drying machine. Based on the control of the control device 42A, first, water is poured into the drum 7 (water receiving tank 4), and then the drum 7 is rotated forward and backward at a rotational speed of about 46 rpm to perform a “washing” operation. Then, after draining from the water receiving tank 4 and performing the operation of “dehydration 1”, water is injected again and the operation of “rinse 1” is performed. The rotation speed of the drum 7 in “dehydration 1” is about 1200 rpm, “ As for “Rinse 1”, the rotational speed of the drum 7 is about 46 rpm as in “washing”. Thereafter, the operations of “dehydration 2” and “rinse 2” similar to “dehydration 1” and “rinse 1” are performed, followed by “final dehydration” in which the drum 7 is rotated at about 1700 rpm. When the washing operation as described above is completed, based on the control of the control devices 42A and 42B, the compressor 27 and the fan 24 are operated by driving the compressor motor 28 and the fan motor 22, and the hot air is blown to the drum 7. A "drying" operation in which the drum 7 is reversed in the forward direction at about 46 rpm, ie, a drying operation is performed.

  As is clear from the time chart shown in FIG. 5, the washing machine motor 5 controlled by the control device 42A (the microcomputer 53A) is used during the execution of the washing / drying operation from the “washing” process to the “drying” process. However, the compressor motor 28 and the fan motor 22 controlled by the control device 42B (the microcomputer 53B) are not used during the washing operation from the “washing” process to the “final dehydration” process (operation). Not) and will be used in the “drying” process or drying operation.

  Therefore, in the first embodiment, the control device 42A gives a power cut-off command to the power cut-off circuit 52 before the washing / drying operation is started. As a result, the power cutoff circuit 52 cuts off the supply of the control DC power to the control device 42B, and the control DC power is not supplied to the microcomputer 53B and the gate driver 54B. Thereafter, when the washing operation is finished and the control device 42A shifts to the drying operation ("drying process"), the control device 42A gives a power-off circuit 52 to the power-off circuit 52, and the power-supply circuit 52B controls the control device 42B. To supply control DC power. Thereby, the microcomputer 53B is initialized after a power-on reset. Then, the control device 42A gives a drying operation start command to the control device 42B by serial communication, and thus the drying operation is started. In the first embodiment, the control device 42A gives a power cut-off command to the power cut-off circuit 52 when the drying operation is finished.

  As described above, according to the first embodiment, during the washing operation in the washing / drying operation, the compressor motor 28 and the fan motor 22 are not used, and the control device 42B that controls the compressor motor 28 and the fan motor 22 is used. On the other hand, since the supply of the control DC power supply is cut off during that period, the control DC power supply is not supplied to the microcomputer 53B and the gate driver 54B of the control device 42B, and a dark current (standby current) flows through them. However, the consumption of dark current can be reduced. In this embodiment, the consumption can be eliminated and power can be saved.

In the control device 42B, the standby power of the microcomputer 53B is
5V x 100mA = 0.5W
The standby power of the gate driver (IC) 54B is
15V × 4mA = 0.06W
And the total is 0.56W. If the washing operation time in the washing and drying operation, that is, the supply cut-off time of the control DC power supply to the microcomputer 53B and the gate driver 54B is 0.7h, the amount of power is
0.56W × 0.7h = 0.392Wh
Thus, this much electric energy can be saved. The non-operating standby power when the drum type washing / drying machine is turned on is about 10 W as a whole of the control device 42B including the display unit of the operation panel 66, the backlight, and the like. Electric power 10W × 0.7h = 7Wh
Of 5.6%.

  In the first embodiment, the supply of the control DC power supply to the control device 42B is cut off during the period of the washing operation in which the motor 28 and the fan motor 22 are not used. A period during which supply is cut off may be partially provided. Even in this case, the consumption of dark current can be reduced.

(Second Embodiment)
6 and 7 show a second embodiment.
In the second embodiment, as shown in FIG. 6, the control device 42A gives an oscillation stop command to the control device 42B before the washing and drying operation is started. As shown in FIG. 7, the microcomputer 53B of the control device 42B includes an oscillation stop control circuit 69. The oscillation stop control circuit 69 is supplied with an oscillation stop command from the control device 42A. When an oscillation stop command is given, the operations of the oscillation circuit 60 and the multiplication circuit 62 are stopped. The oscillation stop control circuit 69 is configured to start the operations of the oscillation circuit 60 and the multiplication circuit 62 when a stop cancellation command is given from the control device 42A.

  Therefore, the control device 42A gives an oscillation stop command to the oscillation stop control circuit 69 of the control device 42B before the washing / drying operation is started. Thereby, the oscillation stop control circuit 69 stops the operations of the oscillation circuit 60 and the multiplication circuit 62. That is, the generation of the clock pulse is stopped when the oscillation circuit 60 stops oscillating, and the supply of the clock pulse is cut off when the multiplication circuit 62 stops the multiplication operation. As a result, the microcomputer 53B stops supplying the clock pulse and stops its operation.

  The control device 42A then gives a stop cancellation command to the oscillation stop control circuit 69 when the washing operation is finished and the drying operation (the “drying process”) is started, and the oscillation stop control circuit 69 The oscillation circuit 60 and the multiplication circuit 62 are started to operate. Then, the control device 42A gives a drying operation start command to the control device 42B by serial communication, and thus the drying operation is started. In the second embodiment, the control device 42A gives an oscillation stop command to the oscillation stop control circuit 69 when the drying operation is completed.

  According to the second embodiment, during the execution of the washing operation in the washing / drying operation, the comp motor 28 and the fan motor 22 are not used, and the control device 42B that controls the comp motor 28 and the fan motor 22 is controlled. Since the clock pulse is not generated during the period, the microcomputer 53B is in a stopped state, the dark current (standby current) is suppressed from flowing, the consumption of the dark current can be reduced, and the power can be saved. Can do.

  In the second embodiment, the clock pulse is not generated for the control device 42B during the period of the washing operation in which the motor 28 and the fan motor 22 are not used. It may be provided partially, and even in this case, the consumption of dark current can be reduced.

  In the second embodiment, the oscillation stop control circuit 69 stops the operations of both the oscillation circuit 60 and the multiplication circuit 62. However, the operation of the oscillation circuit 60 is stopped by setting the multiplication circuit 62 to the operating state ( The generation of the clock pulse may be stopped), or the operation of the multiplication circuit 62 may be stopped (the supply of the clock pulse is cut off) with the oscillation circuit 60 in the operating state.

(Third embodiment)
8 and 9 show a third embodiment.
In the third embodiment, as shown in FIG. 8, the control device 42A gives a CPU clock select command to the control device 42B before the washing / drying operation is started. The clock pulse generating circuit 59 of the microcomputer 53B in the control device 42B includes a frequency dividing circuit 70 and a selector 71 as shown in FIG. The frequency divider 70 divides the 64 MHz clock pulse from the frequency multiplier 62 and outputs the clock pulse as a clock pulse of 32 MHz (divided by 2), 16 MHz (divided by 4), and 8 MHz (divided by 8), respectively. The selector 71 selects and outputs a clock pulse supplied from the multiplier circuit 62 and the frequency divider circuit 70 based on a CPU clock select command supplied from the control device 42A. If the supplied CPU clock select command is 64 MHz, for example. For example, a 64 MHz clock pulse is selected and output. For example, if it is 8 MHz, an 8 MHz clock pulse is selected and output to obtain a CPU clock pulse.

  Therefore, the control device 42A gives a CPU clock select command for selecting, for example, 8 MHz to the selector 71 of the control branch 42B before the washing / drying operation is started. As a result, the selector 71 outputs an 8 MHz clock pulse as a CPU clock pulse, and the CPU 56 of the microcomputer 42B, for example, is operated at a significantly lower speed than the normal time when a 64 MHz clock pulse is applied. After that, when the washing operation ends and the control device 42A shifts to the drying operation ("drying process"), the control device 42A gives a CPU clock selection command for selecting 64 MHz to the selector 71. Are selected and output as CPU clock pulses. As a result, the CPU 56 of the microcomputer 42B can operate at a normal high speed. Then, the control device 42A gives a drying operation start command to the control device 42B by serial communication, and thus the drying operation is started. In the third embodiment, the control device 42A gives an 8 MHz CPU selection command to the selector 71 when the drying operation is completed.

  According to the third embodiment, during the washing operation in the washing / drying operation, it is a period in which the comp motor 28 and the fan motor 22 are not used. During this period, the clock pulse generation frequency is reduced from the normal time to reduce the supply of the clock pulse, so that the CPU 56 of the microcomputer 53B operates at a lower speed than the normal time and consumes dark current. It can reduce and can save power.

In the third embodiment, the supply of the clock pulse is reduced to the control device 42B during the washing operation period in which the motor 28 and the fan motor 22 are not used. A period for the reduction may be partially provided. Even in this case, dark current consumption can be reduced.
In the third embodiment, for example, clock pulses of 64 MHz and 8 MHz are obtained by using the frequency dividing circuit 70. For example, a low-speed oscillator 61 is provided in addition to the high-speed oscillator 61. These may be switched and used.

(Fourth embodiment)
10 and 11 show a fourth embodiment.
In the fourth embodiment, a reset terminal (not shown) is provided in the microcomputer 53B of the control device 42B, and a reset command (reset signal) is supplied from the control device 42A to the reset terminal as shown in FIG. Is to be given.

  Therefore, the control device 42A gives a low level signal as a reset command to the reset terminal of the microcomputer 53B in the control device 42B before the washing and drying operation is started. When a low level signal is applied to the reset terminal, the microcomputer 53B enters a reset state, and as shown in FIG. 11, the oscillation circuit 60 (see FIG. 4) operates and the CPU 56 (see FIG. 4) is in an initialized state. The RAM 58 (see FIG. 4) holds the current value, the I / O interface (not shown) is in a high (high) impedance state, and the I / O register (not shown) is in an initial value holding state. (Standby current) is suppressed.

  After that, when the washing operation ends and the control device 42A shifts to the drying operation ("drying process"), the control device 42A gives a high level signal as a reset release command to the reset terminal of the microcomputer 53B. . When a high level signal is applied to the reset terminal of the microcomputer 53B, as shown in FIG. 11, the oscillation circuit 60 operates, the CPU 56 operates normally, the RAM 58 operates according to the operation of the CPU, the I / O interface and the I / O. The register is in a normal state due to the operation of the CPU. Then, the control device 42A gives a drying operation start command to the control device 42B by serial communication, and thus the drying operation is started. In the fourth embodiment, the control device 42A gives a low level signal to the reset terminal of the microcomputer 53B when the drying operation is completed.

  According to the fourth embodiment, during the washing operation in the washing / drying operation, the compressor motor 28 and the fan motor 22 are not used, and the microcomputer 53B in the control device 42B that controls the compressor motor 28 and the fan motor 22 is used. Since the reset command (reset signal) is given to the reset terminal during that period, the dark current (standby current) is prevented from flowing, the consumption of the dark current can be reduced, and the power can be saved. .

  In the fourth embodiment, the reset signal is given to the reset terminal of the microcomputer 53B of the control device 42B during the period of the washing operation in which the motor 28 and the fan motor 22 are not used. In this case, the dark current consumption can be reduced.

(Other embodiments)
Each of the above embodiments is a case where the present invention is applied to a drum-type washing and drying machine. Is also applicable.
As described above, according to the present embodiment, a plurality of washing machine loads for executing washing / drying operations of washing, rinsing, dehydration and drying, and the washing / drying operation is executed by controlling these washing machine loads. A control device having a plurality of control units, wherein the control device cuts off power supply during the period to a control unit corresponding to a washing machine load having a period not to be used during execution of the washing and drying operation. It is characterized by providing a period of time. Thereby, it can suppress that dark current (standby current) flows, can reduce consumption of dark current, and can aim at power saving.

  Although several embodiments have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  In the drawing, 5 is a washing machine motor (washing machine load), 7 is a drum, 22 is a fan motor (washing machine load), 24 is a fan, 27 is a compressor, 28 is a compressor motor (washing machine load), 34, 38 and Reference numeral 40 is an inverter circuit, 42A and 42B are control devices, 43 is a drive power supply circuit, 51 is a control power supply circuit, 53A and 53B are microcomputers (control units), and 59 is a clock pulse generation circuit.

Claims (5)

Washing, rinsing, dewatering and drying laundry with multiple washing machine loads to perform the drying operation;
A control device having a plurality of control units for controlling the washing machine load and executing the washing and drying operation,
The controller is provided with a period during which the power supply is cut off for the control unit corresponding to the washing machine load having a period not to be used during the execution of the washing / drying operation. . Washing, rinsing, dewatering and drying laundry with multiple washing machine loads to perform the drying operation;
A control device having a plurality of microcomputers for controlling the washing machine load and executing the washing and drying operation,
The control device has provided a period for stopping the supply of the clock pulse within the period for the clock pulse generation circuit of the microcomputer corresponding to the washing machine load having a period not to be used during the execution of the washing and drying operation. A washing dryer characterized by. Washing, rinsing, dewatering and drying laundry with multiple washing machine loads to perform the drying operation;
A control device having a plurality of microcomputers for controlling the washing machine load and executing the washing and drying operation,
The control device provides a period for reducing the supply of clock pulses within the period for a clock pulse generation circuit of a microcomputer corresponding to a washing machine load having a period not used during execution of the washing and drying operation. A washing dryer characterized by. Washing, rinsing, dewatering and drying laundry with multiple washing machine loads to perform the drying operation;
A control device having a plurality of microcomputers for controlling the washing machine load and executing the washing and drying operation,
The control device includes a period during which a reset signal is applied to a reset terminal of a microcomputer corresponding to a washing machine load having a period during which the washing / drying operation is not used. Dryer. One of the plurality of microcomputers included in the control device is a microcomputer that controls a compressor motor that drives a compressor of a heat pump as a washing machine load for performing a drying operation.
5. The washing / drying machine according to claim 2, wherein the washing machine load having a period not used during execution of the washing / drying operation is the compressor motor not used during the washing operation.

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