JP4525472B2 - Control device for washing dryer - Google Patents

Description

The present invention relates to a washing and drying machine controller for use in washing and drying machine.

  2. Description of the Related Art Conventional devices equipped with an electric device control device include an electric heater and a washing and drying machine that dries clothes using a heat pump device as a heat source (see, for example, Patent Document 1). FIG. 7 is a side sectional view of the washing / drying machine described in Patent Document 1.

  In FIG. 7, the washing / drying machine 1 has a casing 2, and a door 12 for attaching and removing clothes 6 is attached to the center of the casing 2, and a rotary drum 3 is rotatably housed therein. Yes. In a predetermined part of the rotating drum 3, a beater 5 for lifting and dropping the garment 6 with the rotation of the rotating drum 3, and a punching hole 4 through which washing water 7 and drying air 9 for drying enter and exit are opened. It is. The shaft 11 of the rotating drum 3 is rotationally driven by a driving motor (not shown).

  In addition, the back surface of the rotating drum 3 in the casing 2 is partitioned by a partition wall 22 having an air inlet 24 and an air outlet 23 to form ducts 10 and 13 through which the drying air 9 passes. The lower part of the front surface of the partition wall 22 constitutes a washing tub 14, and the lower part of the rotating drum 3 faces the portion of the washing tub 14.

  Each of the ducts 10 and 13 is formed with a so-called heat pump cycle including a compressor 19, a condenser (condenser) 18, a circulation fan 17, an expansion valve 20, an evaporator (evaporator) 15, and the like. A part of the capacitor 18 is extended to the outer back surface of the casing 2 to form a radiator 16. 21 is a drain drain pipe for draining the condensed water generated in the condenser 18, and 8 is a laundry drain pipe for draining the wash water in the washing tub 1.

  Next, each process and operation of the washing / drying machine having the above configuration will be described.

  In the washing and rinsing step, the door 12 is opened, the garment 6 and an appropriate amount of detergent are put in, the door 12 is closed, and the following steps are executed.

  A specified amount of water 7 is supplied from the water supply valve (not shown) to the washing tub 14 until the water level A is reached. The rotating drum 3 rotates continuously or intermittently at the programmed number of rotations to perform cleaning. During this time, the garment 6 is lifted and dropped by the beater 5. After the washing is finished, the washing drainage pipe 8 of the washing tub 14 is drained out of the washing dryer 1. Subsequently, the rinsing process is performed in the same process. Rinsing water is also drained out of the machine from the washing drain pipe 8 as washing drain.

  In the dehydration step, the rotating drum 3 rotates at a programmed number of rotations to dehydrate moisture in the clothing 6. The dewatered water is drained out of the washing dryer 1 from the washing drain pipe 8 as washing drain.

In the drying process, the compressor 19, the circulation fan 17 and the rotary drum 3 are operated, and the drying air 9 circulates inside the ducts 10 and 13 and the rotary drum 3. The water vapor evaporated from the garment 6 contacts the evaporator 15 through the air outlet 23 and the duct 10 together with the drying air 9, and is cooled to be condensed water (condensed water) and dehumidified. The dehumidified drying air 9 is sent to the condenser 18 by the circulation fan 17, heated there to become hot air, flows into the rotary drum 3 through the duct 13 and the air inlet 24, and again receives moisture from the clothing 6. Evaporate. The dehumidified condensed water is drained out of the washing / drying machine 1 through the drain drain pipe 21. During this time, the rotating drum 3 rotates continuously or intermittently at a preset number of rotations as in the cleaning step.
Japanese Unexamined Patent Publication No. 1-332893

  However, the above-mentioned patent document 1 relates to the control of the rotary drum 3 and the control of the circulation fan 17 and the compressor 19, the control of water supply and drainage, and the user of the washing and drying machine such as washing / rinsing / dehydrating / drying by the user. For example, for each course selection, start, pause, etc., and control of the operation / display unit (also called man-machine interface etc.) for displaying the current process and the remaining time. A specific configuration such as whether the microcomputer controls various means is not shown.

  Conventionally, this type of washing and drying machine generally uses an electric heater as a heating means at the time of drying, and the control of the electric heater itself is easier than the case of the compressor 19. In the current microcomputers that are generally used, the processing speed and ROM are used to process a washing function of washing, rinsing, and dehydration, as well as a drying function using an electric heater and a blower fan. There are many difficult aspects from the viewpoint of capacity and RAM capacity, and some adopt a configuration in which roles are controlled by a plurality of microcomputers. In particular, in the washing and drying machine having the compressor 19, when the inverter-driven variable compression capacity control is performed, faster processing and large-capacity ROM and RAM are necessary, and it is increasingly necessary to use a plurality of microcomputers. It is considered necessary.

  Rotating drum 3 that realizes a washing function, a washing control circuit that controls loads such as water supply and drainage, a drying control circuit that controls loads such as a motor for the circulation fan 17 and a compressor 19 that realizes a drying function, and operations / When considering a configuration in which multiple control circuits such as display control circuits have individual microcomputers and operate the washing and drying machine in cooperation with each other, the washing and drying machine is operated or stopped more reliably in cooperation with each other. Therefore, it is a problem to construct a means that does not cause a problem that a desired operation is not performed due to an abnormality when an abnormality occurs in the control circuit.

SUMMARY OF THE INVENTION The present invention solves the above-described problems, and an object thereof is to provide a highly reliable control device for a washing and drying machine that stops a predetermined load when an abnormality occurs in cooperation with a plurality of control circuits. It is.

In order to solve the above-described conventional problems, a control device for a washing and drying machine according to the present invention includes a first control circuit that has a first microcomputer that controls a compressor and a circulation fan motor, and that functions as a drying control circuit. A washing motor that controls the first control circuit and that drives a rotating drum; a water supply valve that opens and closes when supplying water to the washing tub; and a drain that operates when draining the washing water from the washing tub a second control circuit which performs the function of washing control circuit includes a second microcomputer for controlling the valves and the like, and a communication circuit for exchanging data between the first microcomputer and the second microcomputer, the A first power source controlled by a second microcomputer to turn on and off the power supply to the first microcomputer, the compressor and the circulation fan motor And a laser, the second control circuit, when an abnormality can not control the communication error or the compressor and the circulation fan motor of the communication circuit occurs, the second microcomputer first power relay By controlling the power supply to the first microcomputer, the compressor and the circulation fan motor , only the function of the drying control circuit is stopped, and the function of the drying control circuit is achieved. The communication between the first control circuit and the second control circuit serving as the washing control circuit is separated and linked with the communication circuit , so that the communication circuit communication error or the compressor or circulation fan motor cannot be controlled. There can be a case of occurrence provides a function only to Suspend reliable washing and drying machine control system of the drying control circuit.

A control device for a washing and drying machine according to the present invention separates a first control circuit that functions as a drying control circuit and a second control circuit that functions as a washing control circuit, and cooperates with the communication circuit to establish a communication circuit. it can be an error that would not be abnormal communication or control the compressor and circulating fan motor is in the event of, providing a high washing and drying machine control device functions only reliable you stop the drying control circuit.

According to a first aspect of the present invention, there is provided a first control circuit having a first microcomputer for controlling a compressor and a circulation fan motor , and performing a function of a drying control circuit ; A washing control circuit having a second washing motor that controls a washing motor to be driven, a water supply valve that opens and closes when supplying water to the washing tub, and a drain valve that operates when draining the washing water from the washing tub a second control circuit which performs the function, the first microcomputer and the communication circuit for exchanging data with the second microcomputer, is controlled by the second microcomputer first microcomputer, the compression and a first power relay for turning on and off the power supply to the machine and the circulation fan motor, said second control circuit, said communication circuit If the abnormality can not communicate abnormal or controlling the compressor or the circulation fan motor is generated, the second microcomputer the control the first power relay first microcomputer, the compressor and the circulating fan motor The function of the drying control circuit is stopped by shutting off the power supply to the first control circuit, and the second control functioning as the washing control circuit and the first control circuit functioning as the drying control circuit. in cooperation with the communication circuit with fractionating the circuit, when an abnormality that can not communicate abnormality or control the compressor and circulating fan motor of the communication circuit occurs, that stops only the function of drying control circuit reliable washing A control device for a dryer can be provided .

According to a second invention, in particular, in the first invention , the first control circuit includes a voltage doubler rectifier circuit supplied with power supplied from a commercial power supply, and a compressor supplied with power supplied from the voltage doubler rectifier circuit. A compressor driving circuit for driving the motor, a motor driving circuit for supplying power from the voltage doubler rectifier circuit to drive the circulating fan motor, and a current detection circuit for detecting the motor current of the compressor connected to the first microcomputer A third power relay controlled by a second microcomputer to turn on and off the power supply, the third power relay being provided between the voltage doubler rectifier circuit, the compressor driving circuit and the motor driving circuit, When the current detection circuit detects that the motor current is flowing while the compressor is stopped, the second microcomputer controls the third relay. To which was so as to interrupt the power supply to the compressor and the circulation fan motor, when the abnormality occurs, providing a predetermined high washing and drying machine control system reliability that only a stop load of drying control circuit can do.

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

(Embodiment 1)
The case where the control device for an electric device according to the first embodiment of the present invention is mounted on a washing / drying machine which is one of the electric devices will be described as an example.

FIG. 1 is a block diagram showing the configuration of a washing / drying machine equipped with the control device for electrical equipment in the present embodiment. FIG. 2 is a flowchart showing the operation of the electric device control apparatus when an abnormality occurs.

  In FIG. 1, the control device for electric equipment (hereinafter referred to as “control device”) in the present embodiment includes a first control circuit 25, a second control circuit 28 that controls the first control circuit 25, The first communication circuit 32 is configured to exchange data between the first and second control circuits 25 and 28.

  The first control circuit 25 includes a first microcomputer 34 and functions as a drying control circuit that controls the compressor 26 and the circulation fan motor 27 as loads. The second control circuit 28 includes a second microcomputer. A washing motor 29 that has a computer 35 and controls the first control circuit 25 and drives a rotating drum (not shown), and a water supply valve that opens and closes when water is supplied to a washing tub (not shown) 30 and a function of a washing control circuit that controls a load such as a drain valve 31 that is operated when draining washing water from the washing tub.

  Data is exchanged between the first microcomputer 34 of the first control circuit 25 and the second microcomputer 35 of the second control circuit 28 via the first communication circuit 32. The second control circuit 28 turns on / off the power supply to the load (compressor 26, circulation fan motor 27, etc.) of the first control circuit 25, and if an abnormality occurs, supplies power to the load. A first power relay 33 is provided as an opening / closing means for blocking.

  The operation / display control circuit 36 includes an operation circuit 37 for selecting, starting, pausing, etc. each course of the washing / drying machine such as washing / rinsing / dehydrating / drying, and the current process and remaining time. The display circuit 38 that performs display is controlled by the input / output of the third microcomputer 39.

  The operation and action of the control apparatus for electric equipment configured as described above will be described.

  The power supply to the control device mounted in the washing / drying machine is first performed by operating the power-on switch 40. While the power-on switch 40 is being pressed, the internal contact 40 a is closed, and power is supplied from the commercial power source 42 of the AC 100 via the resistor 41. During this time, the voltage doubler rectifier circuit 43 is gradually charged, the DC stabilized power circuit 44 is activated to supply DC power, and the second microcomputer 35 starts its operation. The second microcomputer 35 operates the second power supply relay 46 via the drive circuit 45 to close the contact 46 a connected in parallel to the power-on switch 40 and the resistor 41. In this state, the contact point 46a of the second power supply relay 46 is kept closed even when the contact point of the power on switch 40 is opened, so that the commercial power source 42 is continuously supplied to the control device.

  On the other hand, when the second microcomputer 35 operates the first power supply relay 33 as an opening / closing means via the drive circuit 47 to close the contact 33a, the power is supplied from the commercial power supply 42 of the AC 100 to the first control circuit 25. To be supplied. During this time, the voltage doubler rectifier circuit 48 is gradually charged, the DC stabilized power supply circuit 49 operates to supply DC power, and the first microcomputer 34 starts its operation. The voltage doubler rectifier circuit 48 also supplies drive power to the compressor 26 and the circulation fan motor 27 via the compressor drive circuit 50 and the motor drive circuit 51, and the contact 33a of the first power relay 33 is opened and closed. The power supply to the load is turned on and off.

  When performing a drying operation for drying clothes in a washing tub (not shown), the user operates the operation circuit 37 of the operation / display control circuit 36. Then, the second microcomputer 35 of the second control circuit 28 recognizes this operation via the third microcomputer 39 and the second communication circuit 52. The second microcomputer 35 controls the washing motor 29 to be controlled via the motor drive circuit 53 so that a rotating drum (not shown) rotates in a predetermined rotation direction at a predetermined rotation speed.

  While the clothes to be dried are agitated by a rotating drum, the second microcomputer 35 is connected to the first control circuit 25 via the first communication circuit 32 in order to circulate drying air and perform heating and dehumidification. The first microcomputer 34 is instructed to drive the circulation fan motor 27 and the compressor 26 at a predetermined rotational speed.

  In this manner, the washing motor 29, the compressor 26, and the circulation fan motor 27 are driven, and the drying operation is performed.

  Next, the operation when an abnormality occurs in the electrical apparatus control device according to the present embodiment will be described with reference to FIG.

  For example, when the drying of the clothing proceeds and ends, the second control circuit 28 stops the washing motor 29 and stops the rotating drum. Since the rotating drum is stopped, it is easy to take out clothes that have been dried. At this time, the electric power is wasted if the compressor 26 and the circulation fan motor 27 are operating. The first control circuit 25 is instructed to stop the compressor 26 and the circulation fan motor 27 via the communication circuit 32. However, if the first communication circuit 32 fails, or if an abnormality such as a communication abnormality occurs, such as a communication signal is disturbed by external noise or the operation of the first microcomputer 34 becomes unstable. The compressor 26 or the circulation fan motor 27 is stopped by the steps as shown in FIG.

  That is, in step S1, the second microcomputer 35 of the second control circuit 28 determines whether an abnormality such as a communication abnormality has occurred. If no abnormality has occurred, the process proceeds to the next process. If it is determined that an abnormality has occurred, the process proceeds to step S2 to open the contact 33a of the first power supply relay 33, which is an opening / closing means.

  As described above, according to the present embodiment, when an abnormality such as a communication abnormality occurs, the power supply to the circuits after the voltage doubler rectifier circuit 48 is opened by opening the contact 33a of the first power supply relay 33. The supply is stopped, the power source for driving the compressor 26 and the circulation fan motor 27, which are loads, is cut off, and the first microcomputer 34, the compressor drive circuit 50, the motor drive circuit 51, and the like are used. The power supply for operation of almost all of the control circuits 25 is cut off, so that the load is stopped, and a plurality of control circuits cooperate to stop a predetermined load when an abnormality occurs and a highly reliable electric device. Control device can be provided.

  In the above embodiment, the circulation fan motor 27 is one of the loads controlled by the first control circuit 25. However, a combination of the circulation fan motor 27 controlled by the second control circuit 28 may be used. There is no particular limitation on the type.

  In the present embodiment, the compressor drive circuit 50 and the motor drive circuits 51 and 53 are assumed to be inverter circuits that drive a DC motor. However, a bearer motor that can be driven and stopped when the AC power is turned on and off. The same applies to an induction motor of a capacitor run. In that case, a switching element such as a relay or a triac is assumed as a drive circuit, and the present invention does not particularly limit the system of the drive circuit.

  Further, when the plurality of control circuits have opening / closing means for switching on and off the power supply to the load of the control circuit of the communication partner, the second control circuit supplies the power to the load of the first control circuit. The same applies to the case of having an opening / closing means for turning on / off and also an opening / closing means for turning on / off the power supply to the load of the third control circuit, and does not limit the combination and number of the control circuits and the opening / closing means.

(Embodiment 2)
FIG. 3 is a block diagram showing a configuration of a washing / drying machine equipped with the control device for electric equipment according to the second embodiment of the present invention. In addition, about the same part as the washing dryer in the said 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the present embodiment, a third power supply relay 54 is provided as an additional switching means driven by the second microcomputer 35, and the contact 54 a is connected to the power supply after rectification of the voltage doubler rectifier circuit 48 and the compressor drive circuit 50. The power supply to the compressor 26 and the circulation fan motor 27 that are loads of the first control circuit 25 is turned on and off, and the contact 54a is opened when an abnormality occurs. Therefore, the compressor 26 and the circulation fan motor 27 can be stopped, and a plurality of control circuits cooperate to provide a highly reliable control device for an electric device that stops a predetermined load when an abnormality occurs. Is something that can be done.

(Embodiment 3)
FIG. 4 is a flowchart showing an operation when an abnormality occurs in the control device for an electric device according to the third embodiment of the present invention. In addition, about the same part as the control apparatus for electric devices in the said embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the present embodiment, when some abnormality such as a communication abnormality occurs, the compressor 26 or the circulation fan motor 27 is stopped by steps as shown in FIG.

  That is, in step S11, the first microcomputer 34 of the first control circuit 25 determines whether a communication abnormality has occurred. If it is determined that no abnormality has occurred, the process proceeds to the next process. If it is determined that an abnormality has occurred, the process proceeds to step S12 to stop driving the compressor drive circuit 50. In step S13, the motor drive circuit is stopped. 51 is stopped.

  As described above, according to the present embodiment, when a communication abnormality occurs, the first microcomputer 34 of the first control circuit 25 stops driving the compressor drive circuit 50, thereby compressing the load. The power supply to the machine 26 is cut off, and the compressor 26 stops. Further, by stopping the driving of the motor drive circuit 51, the power supply to the circulation fan motor 27 that is a load is cut off, and the circulation fan motor 27 is stopped.

  As described above, according to the present embodiment, it is possible to provide a highly reliable control apparatus for electrical equipment that stops a predetermined load when an abnormality occurs in cooperation with a plurality of control circuits. .

(Embodiment 4)
FIG. 5 is a block diagram showing a configuration of a washing / drying machine equipped with the control device for electric equipment according to the fourth embodiment of the present invention. In addition, about the same part as the washing-drying machine in the said embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the present embodiment, as shown in FIG. 5, a current detection circuit 55 that detects a motor current of the compressor 26 that is one of the loads by a current transformer 56 is provided, and the first microcomputer 34 includes a compressor drive circuit. When it is detected that the motor current is flowing while the operation of 50 is stopped, it is determined that there is an abnormality.

  FIG. 6 is a flowchart illustrating an operation when an abnormality occurs in the control device according to the present embodiment.

  When an abnormality occurs in which the first control circuit 25 cannot stop the load, such as when a circuit component of the compressor drive circuit 50 is damaged, the compressor 26 is stopped by the steps shown in FIG.

  FIG. 6A shows an abnormality process in the first control circuit 25. In step S21, the first microcomputer 34 has an abnormality that cannot perform load control based on the detection result by the current detection circuit 55. Determine whether or not. If it is determined that no abnormality has occurred, the process proceeds to the next process. If an abnormality has occurred, the process proceeds to step S22, and the second control circuit 28 cannot perform load control via the first communication circuit 32. Information indicating that the status is correct.

  FIG. 6B shows the abnormality process in the second control circuit 28, and it is determined in step S23 whether or not there is a load control abnormality communication from the first control circuit 25. If it is determined that there is no load control abnormality communication, the process proceeds to the next process. If it is determined that there is load control abnormality communication, the process proceeds to step S24, where the second control circuit 28 is the first switching means. 1 The contact 33a of the power supply relay 33 is opened.

  As described above, according to the present embodiment, the second microcomputer 35 of the second control circuit 28 opens the contact 33a of the first power relay 33 when an abnormality that cannot stop the load occurs. As a result, the power supply to the circuits after the voltage doubler rectifier circuit 48 is stopped, and there is no power to drive the compressor 26 and the circulation fan motor 27 which are loads, and the first microcomputer 34 and the compressor are driven. Since almost all the circuits of the first control circuit 25 including the circuit 50 and the motor drive circuit 51 are turned off, the load is stopped, and a plurality of control circuits cooperate to generate a predetermined error. Therefore, it is possible to provide a highly reliable control apparatus for electrical equipment that stops the load.

  In the present embodiment, the current detection circuit 55 for detecting the driving state of the compressor 26 is formed by the current transformer 56. However, the current detection circuit 55 is not limited to the current transformer 56, and is circulated as one of the loads. Although the fan motor 27 is taken as an example, it is not limited thereto.

As described above, the control device for a washing and drying machine according to the present invention is a highly reliable device that stops a predetermined load when an abnormality occurs in cooperation with a plurality of control circuits. The present invention can be applied to various electric devices having a function of controlling a plurality of loads.

The block diagram which shows the structure of the washing-drying machine carrying the control apparatus for electric devices in the 1st Embodiment of this invention. Flow chart showing operation when abnormality occurs in control apparatus for electrical equipment The block diagram which shows the structure of the washing-drying machine carrying the control apparatus for electric devices in the 2nd Embodiment of this invention. The flowchart which shows the operation | movement at the time of abnormality generation | occurrence | production of the control apparatus for electric devices in the 3rd Embodiment of this invention. The block diagram which shows the structure of the washing-drying machine carrying the control apparatus for electric devices in the 4th Embodiment of this invention. (A) Flowchart showing operation at the time of occurrence of abnormality in the first control circuit of the control apparatus for electric equipment (b) Flowchart showing operation at the time of occurrence of an abnormality in the second control circuit of the control apparatus for electric equipment Cross-sectional side view of a conventional washer-dryer equipped with a control device for electrical equipment

25 First control circuit 26 Compressor (load)
27 Circulation fan motor (load)
28 Second control circuit 32 First communication circuit (communication circuit)
33 First power relay (opening / closing means)
54 Third power relay (opening / closing means)

Claims (2)

A first control circuit having a first microcomputer for controlling the compressor and the circulation fan motor, and serving as a drying control circuit; a washing motor for controlling the first control circuit and driving the rotating drum; A second microcomputer that functions as a washing control circuit has a water supply valve that opens and closes when water is supplied to the washing tub, and a second microcomputer that controls a drain valve that operates when draining the washing water from the washing tub . control circuitry and, wherein the communication circuit for exchanging data between the first microcomputer and the second microcomputer, the second is controlled by the microcomputer of the first microcomputer, the compressor and the circulation fan motor and a first power relay for turning on and off the power supply to the second control circuit, a communication abnormality also in the communication circuit When said compressor and the circulation fan can not control the motor abnormality is generated, the second microcomputer the control the first power relay first microcomputer, the power supply to the compressor and the circulation fan motor A controller for a washing and drying machine configured to stop only the function of the drying control circuit by cutting off the supply. The first control circuit includes a voltage doubler rectifier circuit supplied with power supplied from a commercial power supply, a compressor drive circuit supplied with power from the voltage doubler rectifier circuit to drive a compressor, and the voltage doubler rectifier circuit A motor drive circuit that drives the circulation fan motor by being supplied with power, a current detection circuit that is connected to the first microcomputer and detects the motor current of the compressor, and is controlled by the second microcomputer to turn on and off the supply of power. A third power relay, wherein the third power relay is provided between the voltage doubler rectifier circuit, the compressor drive circuit and the motor drive circuit, and the second control circuit is configured to stop the compressor while the compressor is stopped. When the current detection circuit detects that the motor current is flowing, the second microcomputer controls the third relay to control the compressor and the circulation fan mode. Washing and drying machine control device according to claim 1, wherein so as to cut off the power supply to the.