WO2004029350A1 - 洗濯機 - Google Patents
洗濯機 Download PDFInfo
- Publication number
- WO2004029350A1 WO2004029350A1 PCT/JP2003/008162 JP0308162W WO2004029350A1 WO 2004029350 A1 WO2004029350 A1 WO 2004029350A1 JP 0308162 W JP0308162 W JP 0308162W WO 2004029350 A1 WO2004029350 A1 WO 2004029350A1
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- WO
- WIPO (PCT)
- Prior art keywords
- motor
- current
- laundry
- torque
- washing
- Prior art date
Links
- 238000005406 washing Methods 0.000 title claims abstract description 45
- 238000001514 detection method Methods 0.000 claims description 33
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 42
- 230000007246 mechanism Effects 0.000 description 12
- 238000012937 correction Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 9
- 238000007791 dehumidification Methods 0.000 description 7
- 239000003990 capacitor Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000001133 acceleration Effects 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000003599 detergent Substances 0.000 description 3
- 239000006096 absorbing agent Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 102100027203 B-cell antigen receptor complex-associated protein beta chain Human genes 0.000 description 1
- 101710166261 B-cell antigen receptor complex-associated protein beta chain Proteins 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F33/00—Control of operations performed in washing machines or washer-dryers
- D06F33/30—Control of washing machines characterised by the purpose or target of the control
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/02—Characteristics of laundry or load
- D06F2103/04—Quantity, e.g. weight or variation of weight
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/26—Imbalance; Noise level
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/44—Current or voltage
- D06F2103/46—Current or voltage of the motor driving the drum
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
- D06F34/14—Arrangements for detecting or measuring specific parameters
Definitions
- the present invention relates to a washing machine that detects a current flowing through a motor that generates a rotational driving force for performing a washing, rinsing, and dehydrating operation, and controls the motor based on the detected current.
- the above-mentioned detection is equivalent to detecting the acceleration of the motor, and required a relatively long detection period corresponding to the rise time described above. Furthermore, the variation in the detection results tends to be large for the first reason, and in some cases, the detection operation has to be retried and performed several times, and the detection takes a long time. there were.
- the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a washing machine that can more accurately detect the weight of laundry.
- the present invention has been made in view of the above circumstances, and an object thereof is to provide a device. Disclosure of the invention
- the washing machine of the present invention detects a motor that generates a rotational driving force for performing washing, rinsing, and dehydrating operations, and a current flowing through the motor.
- the torque is controlled so that the generated torque of the motor is at least optimal for each of the washing operation and the dewatering operation.
- speed control means for controlling the rotation speed of the motor based on the current detected by the current detection means, wherein the torque during the period in which the rotation speed of the motor is changing is changed. It is characterized by comprising a quantity discriminating means for discriminating the quantity of the laundry in the rotating tub based on the magnitude of the current.
- the rotation speed of the motor when the rotation speed of the motor is constant, the output torque of the motor changes little even when the amount of laundry in the rotating tub is different, but the rotation speed of the motor changes. In this state, the output torque varies greatly depending on the amount of laundry. Then, the q (quadrature) axis current obtained when vector control is performed on the motor is a current proportional to the output torque of the motor, that is, a torque current. Therefore, the amount of laundry in the tub can be more accurately determined by the amount determining means performing the determination as described above. In addition, since it is only necessary to refer to the value of the q-axis current in a predetermined period, the detection can be performed in a shorter time than before.
- the quantity determining means may be configured to determine the quantity of the laundry based on the magnitude of the torque current during the period when the motor is accelerating. That is, in the operation control of the washing machine, mainly control relating to acceleration is mainly performed, so that the amount of laundry can be easily determined during the acceleration period.
- the quantity determining means may be configured to correct the result of the laundry quantity determination based on the temperature detected by the temperature detecting means. That is, in the rotating mechanism, the mechanical frictional force fluctuates based on the fact that the viscosity of oil used as a lubricant changes at ambient temperature. Therefore, if the determination result is corrected based on the temperature detected by the temperature detection means, the detection accuracy can be improved.
- the apparatus further includes unbalance detection means for detecting an imbalance state of the laundry in the rotating tub based on the torque current, and includes a quantity determination means based on the unbalance state detected by the unbalance detection means.
- You may comprise so that the discrimination result of the laundry amount may be corrected. In the morning and evening, for example, if the state of imbalance determined by the distribution of laundry in the rotating tub is significant, it is difficult to rotate, and the amount of laundry detected in such a case is assumed to be large. Is done. Therefore, in such a case, if the correction is performed so that the detection result becomes smaller, the detection accuracy can be further improved.
- FIG. 1 shows one embodiment of the present invention, which is a flow chart showing the control performed by a control circuit of a washing machine to detect the amount of laundry put into a drum. .
- FIG. 2 shows an example of the driving pattern of the washing machine mode and the change in the output torque of the washing machine mode when the flowchart shown in FIG. 1 is executed.
- FIG. 3 shows a table for detecting the weight of the laundry according to the corrected integrated value Qc.
- FIG. 4 shows specific numerical examples in which the correction is performed by the equation (1) when the unbalanced state of the laundry is small (a) and large (b).
- Figure 6 shows the flow of the entire process of the washing machine.
- FIG. 7 shows a correspondence table for displaying detergent; S required according to the weight detected by the control circuit.
- FIG. 8 is a vertical sectional side view showing the configuration of the drum-type washing machine.
- FIG. 9 is a diagram showing the electrical configuration of the washing / rinsing machine.
- BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
- FIG. 8 is a vertical side view of a drum type: washing machine.
- the cabinet 1 is a combination of steel plates in a rectangular box shape, and a circular opening 2 is formed in the front plate of the cabinet 1.
- a circular door 3 is rotatably mounted on the front plate of the cabinet 1, and the opening 2 is opened and closed based on the turning operation of the door 3.
- Door lock mechanism 4 (see Fig. 9) is mounted on cabinet 1 '.
- the door lock mechanism 4 uses an electromagnetic solenoid (not shown) as a drive source.
- the electromagnetic solenoid When the electromagnetic solenoid is excited when the door 3 is closed, the plunger moves to the lock position, and the door 3 moves. Lock to closed state.
- the cylindrical water receiving tank 5 whose rear surface is closed is housed in a cabinet 1 ′, and the ports 7 of the plurality of absorbers 6 are connected.
- the cylinders 8 of the plurality of apvers 6 are fixed to the bottom plate of the cabinet 1, and the water receiving tank 5 is elastically held by the plurality of absorbers 6 in a horizontal state where the axis is horizontal. ing.
- the circular opening 9 is formed in the water receiving tank 5, and the bellows 10 are interposed between the peripheral edge of the opening 9 and the peripheral edge of the front opening 2.
- the perot 10 has a cylindrical shape, and the opening 2 and the opening 9 are watertightly connected via a bellow 10.
- the cylindrical drain port 11 is fixed to the bottom of the water receiving tank 5, the upper end of the drain port 11 communicates with the water receiving tank 5, and the lower end of the drain port 11 is outside of the cabinet 1. Leads to.
- the electromagnetic drain valve 12 is installed in the drain port 11, and the drain port 11 is opened and closed by switching the state of the drain valve 12.
- Washing mode 13 consists of a three-phase DC brushless mode with a one-way entrance, and is installed in cabinet 1.
- the cylindrical bracket 14 is fixed to the rear surface of the water receiving tank 5, and the stay core 15 is fixed to the outer periphery of the bracket 14.
- the stay core 15 has 36 teeth, and out of the 36 teeth, predetermined 12 teeth have a U-phase coil 15 u wound thereon and another 12 Each tooth has a 15-phase V-phase coil wound around it, and the remaining 12 teeth have a 15-watt W-phase coil wound around it (see Fig. 9). .
- the two bearings 16 are mounted on the inner peripheral surface of the bracket 14, and the rotating shaft 17 is mounted on the inner peripheral surface of both bearings 1.6.
- the rotating shaft 17 has the same axis as the water receiving tank 5, and the front end of the rotating shaft 17 is inserted into the water receiving tank 5.
- a cylindrical mouth core 18 having a closed rear surface is fixed to the rear end of the rotating shaft 17, and 24 mouth magnetic cores 19 are mouth-shaped.
- Evening core 1.8 It is fixed to the inner peripheral surface of 1.8. '
- the drum (rotating tank) 21 located in the water receiving tank 5 is fixed to the rotating shaft 17 of the washing machine 13.
- the drum 21 has a cylindrical shape with a closed rear surface, and is installed in a horizontal state coaxial with the water receiving tank 5. Further, a plurality of dehydration holes 22 are formed in the circumferential portion of the drum 2; 1 over the entire area, and a circular opening 23 is formed on the front surface of the drum 21.
- the opening 23 is opposed to the opening 9 of the water receiving tank 5, and laundry (not shown) in the drum 21 has the opening 9 of the water receiving tank 5 with the door 3 opened. From the opening 23 through the opening.
- a temperature sensor (temperature detecting means) 90 composed of a thermistor or the like is located on the back side of the drum 21 and near the rotating shaft 17 of the motor 13. It is arranged on the inner surface of the water receiving tank 5. The temperature sensor 90 is arranged to detect an ambient temperature in the vicinity of a rotation mechanism around the motor 13. The sensor signal of the temperature sensor 90 is output to the control circuit 37 as shown in FIG.
- An electromagnetic water supply valve 24 (see Fig. 9) is fixed to the upper end of cabinet 1.
- the water supply valve 24 has an input port, a water supply output port, and a dehumidification output port.
- the input port of the water supply valve 24 is connected to a water tap via a water supply hose (not shown). Connected.
- the water supply output port of this water supply valve 2 is connected to the water receiving tank.5.When the water supply output port is opened with the drainage valve 12 closed, tap water is supplied from the water tap to the water supply valve. It is poured into the water receiving tank 5 through 2 4 and stored. ''
- the water level sensor 25 (see Fig. 9) is installed in the cabinet 1.
- a conductive pole is inserted into the inner periphery of the cylindrical coil so that it can slide in the axial direction, and the water level in the water receiving tank 5 depends on the water level. By sliding the pole, the amount of axial wrap with respect to the coil is changed, and a water level signal with a frequency corresponding to the lap amount of both is output.
- '-Funky single 26 is fixed at the rear end of the ceiling plate of cabinet 1.
- the fan casing 26 is of a spiral type having an exhaust port on the front surface and an intake port on the lower surface, and a fan (both not shown) is rotatably housed inside. ing.
- Fanmo 27 (see Figure 9) is fixed to the cabinet 1 cabinet. This fan motor 27 is composed of a capacitor induction motor, and its rotating shaft is connected to the fan rotating shaft via a belt transmission mechanism (not shown).
- the vertically long dehumidifying duct 28 is fixed to the rear surface of the water receiving tank 5.
- the lower end of the dehumidifying duct 28 communicates with the water receiving tank 5, and the upper end is connected to the intake port of the fan casing 26.
- the air in the water receiving tank 5 is dehumidified. It is sucked into the phasing 26 through the port 28.
- the heater case 29 is mounted on the ceiling panel of cabinet 1 with a fan case.
- the front end of the relay duct 30 is connected to the rear side of the relay duct 30.
- the rear end of relay duct 30 is connected to the exhaust port of casing 26, and the air sucked into fan casing 26 passes through relay duct 30 to the air.
- the night sky 91 (see Fig. 9) is housed inside the heat case 29, and the air flowing into the night case 29 is heated by the heat night 91. It is warmed based on that.
- Heating evening Case - 2 9 front side of one end portion of the warm air duct 3 1 is connected.
- the other end of the hot air duct 3 1 passes through the bellows 10 and communicates with the water receiving tank 5, and the hot air generated in the heater case 29 is heated by the hot air duct 3 1. And discharged into the water receiving tank 5 and the drum 21.
- One end of a dehumidification hose (not shown) is connected to a dehumidification output port of the water supply valve 24.
- the other end of the dehumidification hose communicates with the upper end of the dehumidification duct 28, and tap water is injected into the dehumidification duct 28 based on opening of the dehumidification output port. 'Ru.
- the operation panel 3 2 is fixed to the front side of the cabinet 1, and the door opening switch 33 (see Fig. 9) and the operation switch '34 (see Fig. 9) are operated by the operation panel 3. It is attached to the front of 2.
- the circuit box 35 is mounted on the rear surface of the operation panel 32, and a circuit board 36 is housed inside the circuit box 35.
- the circuit board 36 is equipped with a control circuit 37 (current detection means, torque control means, speed control means, quantity discrimination means, temperature detection means, unbalance detection means).
- the control circuit 37 is mainly composed of a micro computer.
- the input terminals of the control circuit 37 are a rotation sensor 20, a water level sensor 25, a door opening switch 33, and an operation switch 3. 4 is electrically connected.
- the output terminal of the control circuit 37 is electrically connected to the door lock mechanism 4, the drain valve 12, the water supply valve 24, the fan motor 27, and the heater 91 via the drive circuit 38. I have.
- the control circuit 37 detects the operation of the door lock switch 33. Then, the door lock mechanism 4 is driven to lock the door 3 in the closed state.
- a control program for generating a PWM signal is recorded.
- the control circuit 37 generates the sinusoidal conduction signals Du, DV,... Dw by processing the rotation signals Hu and HV from the rotation sensor 20 based on a control program.
- These energization signals DuDw determine the drive timing and applied voltage of the U-phase coils 15u to 15w, and are output to the PWM circuit 39.
- the energization signal Dw of the W-phase coil 15w ' is calculated based on the rotation signals Hu and Hv' to calculate the W-phase rotation signal Hw and based on the calculation result.
- the PWM circuit 39 is configured as a part of the control circuit 37, and has a triangular wave generator and a comparator (both not shown).
- the former triangular wave generator generates a triangular wave signal of a predetermined frequency
- the latter comparator compares the triangular wave signal with the energizing signals Du to Dw based on the driving signal (P . W ⁇ M signal) V up ⁇ V wn is generated.
- the circuit board 36 is equipped with a power supply circuit 40 and motor drive circuit 41 having the following configuration.
- One output terminal of the commercial AC power supply 42 is connected to one input terminal of the rectifier circuit 44 via a reactor 4.3 '.
- the other input terminal of the rectifier circuit 44 is connected to the other output terminal of the commercial AC power supply 42, and the capacitors 45 and 46 are connected between both output terminals of the rectifier circuit 44.
- a series circuit is connected.
- the common connection point of these capacitors 45 and 46 is connected to one output terminal of the commercial AC power supply 4.2, and the upper capacitor 4.5 is charged with the positive rectified output.
- the lower capacitor 46 is charged with the negative rectified output.
- the constant voltage circuit 47 is connected between both output terminals of the rectifier circuit 44.
- This constant voltage circuit 47 is mainly composed of a switching regulator, and supplies a low-voltage DC power supply Vcc for driving the control circuit 37 and the like, and a high-voltage DC power supply generated by the capacitors 45 and 46. Generated by stepping down.
- the inverter circuit 48 is connected between both output terminals of the rectifier circuit 44. .
- This inverter circuit 48 is composed of IGBT 48 up-: EGBT 48 wn connected in a three-phase bridge.
- the U-phase coil 15 .u to W-phase coil 15 w of the washing motor 13 is connected to the ⁇ -phase output terminal to the W-phase output terminal of the inverter circuit 48.
- Reference numeral 49 denotes a freewheel diode connected between the collector terminal and the emitter terminal of the IGBT 48 up to GBT 48 w ⁇ .
- the gate terminals of IG ⁇ 8 ⁇ 48 ⁇ u ⁇ to 48 w ⁇ are connected to the IG ⁇ ⁇ ⁇ ⁇ drive circuit 50.
- the IGBT drive circuit 50 is mainly composed of a photobra, and converts the gate drive signals of IGBT 48 up to 48 wn to the drive signals V up to V wn from the PWM circuit 39. Generate based on
- the lower arm side's 10: 874 8 11 1 to 48 ⁇ Emi is the current for each current.
- the voltage level shift 'amplifier circuit 52 includes an operational amplifier and the like, amplifies the terminal voltage of the shunt resistor 51, and sets the output range of the amplified signal to' positive side. 5 V) Apply bias.
- the control circuit 37 converts the output torque of the motor 13 into a sensorless method based on the phase current detected by the shunt resistors 51 to 51 w. It is configured to perform torque control and to control the rotational speed by PI (for details, refer to Japanese Patent Application No. 2002-276991).
- ( ⁇ , ⁇ ) indicates an orthogonal coordinate system obtained by orthogonally transforming a three-phase (UVW) coordinate system with an electrical angle of 120 degrees corresponding to each phase of the three-phase brushless motor 13.
- q) shows the coordinate system of the secondary magnetic flux rotating with the rotation of the mouth of the motor 13.
- the PI controller calculates the target speed command wref of the motor 13 and the detection speed of the motor 13 PI control is performed based on the difference between the degrees and the q-axis current command value I qref and the d-axis current command value I dref are generated and output.
- the d-axis current command value I dref is set to “0” during the washing or rinsing operation, and is set to a predetermined value during the dehydrating operation to perform field weakening control.
- the current PI control unit reduces the d-axis current command value I dref, q-axis current command value I qref and the q-axis current value I q, d-axis current value I d output from the a? / Dq conversion unit. PI control is performed based on the calculation result, and a q-axis voltage command value Vq and a d-axis voltage command value Vd are generated and output.
- the dq /? converter converts the voltage command values Vd, Vq into voltage command values V, Vy5 based on the rotation phase angle 0. '
- the H / U VW converter converts the voltage command values V, V ⁇ into three-phase voltage command values V u., V V, V w and outputs them.
- One of the voltage command values Vu, VV, and Vw and the starting voltage command value output by the initial pattern output unit are switched and supplied to the PWM forming unit.
- the phase current detected by the shunt resistor 51 is A / D converted by the A / D converter 53.
- the U VW / HI /? Conversion unit converts the three-phase current data I u, I v, I w into two-axis current data I H, I ⁇ in a rectangular coordinate system.
- the d / q converter converts the two-axis current data I and I? To the rotation coordinates when the position angle of 0 is obtained from the moment when the vector control is performed. Convert to the d-axis current value I d and q-axis current value I q on the system (d, q).
- the U V W / H conversion unit outputs the d-axis current value I d and the q-axis current value I q to an estimator or the like as described above.
- the estimator the low angle position angle 0 and the rotation speed ⁇ are estimated based on the d-axis current value I d and the q-axis current value I q and output to each section.
- FIG. 1 is a flowchart showing the control performed by the control circuit 37 to detect the amount of laundry put into the drum 21.
- FIG. FIG. 9 shows an example of a change state of the output torque of the drive motor 3 and the motor 13 of FIG.
- the control circuit 37 starts the drive control of the motor 13 (step S1), first, the mouth is positioned by DC excitation (step S2). Then, as described above, the forced commutation operation is performed by the starting voltage command output by the initial pattern output unit, and the motor 13 is started (step S3). 'And the control circuit 37 continues the forced commutation operation in step S3 until the rotation speed of the motor 13 reaches 30 rpm in the following step S4. During the forced forced commutation operation, the control circuit 37 does not start the weight detection process.
- step S 4 When the rotation speed of the motor 13 reaches 30 rpm (step S 4, “Y E S”), the control circuit 37 switches the control to the vector control side. Then, by the speed PI control, the motor 13 is accelerated so that the rotation speed of the motor 13 reaches a target rotation speed (for example, 200 rpm) in about 3 seconds (Step S5, see FIG. 2). . '
- the output torque of motor 13 increases in proportion to the increase in rotation speed, as shown in FIG. 2, but the manner of increase in torque differs according to the weight of the laundry in drum 21. . 'The output torque is approximately proportional to the q-axis current value I q obtained in the vector control. .
- control circuit 37 continues to integrate and integrate the q-bow current value Iq at regular intervals during the acceleration period of about 3 seconds (step S6). That is, since the output torque of the motor 13 changes while the rotation speed of the drum 21 changes, the output torque of the motor 13 changes according to the weight of the laundry to be loaded. By integrating, it is possible to estimate the weight of the laundry.
- control circuit 37 continues to integrate the q-axis current value I q and also integrates the fluctuation of the q-axis current (step S7).
- the fluctuation state of the q-axis current is referred to, the degree of unevenness in the distribution of the laundry in the drum 21, that is, the unbalanced state is known. This is to correct.
- 1 It is presumed that the amount of laundry detected in such a case will be relatively large since the rotation becomes difficult when the balance is remarkable. Therefore, in such a case, the control circuit 37 performs the correction so that the detection result becomes smaller.
- the method of detecting the unbalanced state of the laundry in the drum 21 based on the fluctuation state of the q-axis current is disclosed in detail in Japanese Patent Application No. 2002-212728.
- the method is applied. That is, the q-axis current value sampled in step S6 is thinned out as necessary, and the result of squaring each sample value is regarded as a q-axis current fluctuation, and in step S7, the calculation is performed. Integrate the result. .
- step S8 the control circuit 37 determines whether or not the rotation speed of the motor 13 has reached the target rotation speed of 200 rpm. If not, the control circuit 37 proceeds to step N.0.
- step S5 if the temperature has reached (“YE S”), the temperature T near the rotation mechanism is detected with reference to the sensor signal output from the temperature sensor 90 (step S9). That is, the mechanical frictional force of the motor 13 changes based on the fact that the viscosity of the lubricating oil injected into the rotating mechanism such as the bearing changes according to the temperature T. Therefore, since the load state of motor 13 also slightly changes accordingly, correction is performed as described later.
- control circuit 37 calculates and estimates the weight of the laundry. Assuming that the q-axis current value integrated in step S6 is QI and the q-axis current variation value integrated in step S7 is Qchl, the unbalanced state of the laundry and the temperature near the rotating mechanism T CC ) Is calculated as follows.
- the weight of the laundry is estimated as shown in FIG. 3 according to the corrected integrated value Qc.
- control circuit 37 ends the process when the motor 13 is decelerated and stopped (step S11).
- FIG. 4 shows a specific numerical example in which the correction is performed by the equation (1) when the laundry impairment state is small (a) and large (b).
- the weight (load weight) of the laundry is 3 kg
- the Q-axis current integral at imbalance: small, Q is 7'.5 A.S
- the announce: large, Q-axis current integral at QI is larger than 9.5 A.S
- the Q-axis current variation integrated value Qchl is also 0.2 A ⁇ S for the former and 0.5 A ⁇ S for the latter.
- the value Qc is corrected so that the former is ⁇ , 5 A ⁇ S, and the latter is 7.307 ⁇ '-A' S, which is almost the same value.
- Fig. 5 the horizontal axis shows the load weight, and the vertical axis shows the Q-axis current integral.
- values are shown in a graph. In the example of Fig. 4, when the imbalance is small, the values before and after the correction match. In this way, it can be seen that even if the imbalance is large or small, both are corrected to be approximately equal.
- Fig. 6 shows the flow of the entire process of the washing machine. That is, when the user puts laundry such as clothes into the drum 21 and selects and starts an appropriate washing course, first, the above-described weight detection is performed. Then, the control circuit .37 displays the required amount of detergent according to the detected weight on a display unit (not shown) (see FIG. 7), and when the user inputs the amount of detergent based on the display, The time displayed until the remaining steps are completed is displayed. .
- control circuit 37 performs vector control of the output torque of the washing machine 13 and PI control of the rotation speed of the washing machine 13.
- the magnitude of the torque current during the period when the rotation speed is changing The weight of the laundry in the rotating tub is determined. That is, when the rotation speed of the motor 13 is changing, the output torque greatly changes according to the amount of the washing material in the drum 21. Then, the q-axis current obtained when vector control is performed on the motor 13 is a current proportional to the output torque of the motor, that is: a torque current, so that the weight of the laundry in the drum 21 is Can be determined more accurately. Also, since it is only necessary to refer to the value of the q-axis current in a predetermined period, the detection can be performed in a shorter time than before.
- control circuit 37 determines the amount of the laundry based on the magnitude of the torque current during the period when the motor 13 is accelerating, and thus the control circuit 37 mainly performs the operation control of the washing machine. It is easy to determine the weight of the laundry during the period of acceleration. .
- control circuit 37 corrects the discrimination result of the laundry amount based on the temperature detected by the temperature sensor 90, and thus takes into account the mechanical frictional force of the rotating mechanism that changes depending on the temperature. Performing this correction can improve the detection accuracy. Further, the control circuit 37 corrects the discrimination result of the weight of the laundry based on the unbalanced state of the laundry in the drum 21 according to the fluctuation state of the q-axis current. The detection accuracy can be further improved in consideration of the load amount of the motor 13 depending on the balance state.
- the same detection may be performed not only during the period when the motor rotation is accelerating but also during the period when the rotation is decelerating.
- the correction to be performed according to the unbalance state or the temperature in the vicinity of the rotating mechanism may be performed as needed.
- the temperature detecting means may be arranged so as to detect the temperature in the vicinity of or near the motor.
- the present invention is not limited to the drum type washing machine, but can be similarly applied to a vertical type fully automatic washing machine in which the stirring blade is rotated during the washing / rinsing operation.
- the amount of the laundry in the tub can be determined more accurately.
- detection can be performed in a shorter time than before.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Control Of Washing Machine And Dryer (AREA)
- Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
- Detail Structures Of Washing Machines And Dryers (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Control Of Ac Motors In General (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03738535A EP1561851A4 (en) | 2002-09-24 | 2003-06-26 | WASHING MACHINE |
CNB038225301A CN100422424C (zh) | 2002-09-24 | 2003-06-26 | 洗衣机 |
US10/528,791 US8196440B2 (en) | 2002-09-24 | 2003-06-26 | Drum washing machine |
KR1020057004967A KR100739902B1 (ko) | 2002-09-24 | 2003-06-26 | 세탁기 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002277325A JP3962668B2 (ja) | 2002-09-24 | 2002-09-24 | ドラム式洗濯機 |
JP2002-277325 | 2002-09-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004029350A1 true WO2004029350A1 (ja) | 2004-04-08 |
Family
ID=32040404
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/008162 WO2004029350A1 (ja) | 2002-09-24 | 2003-06-26 | 洗濯機 |
Country Status (7)
Country | Link |
---|---|
US (1) | US8196440B2 (ja) |
EP (1) | EP1561851A4 (ja) |
JP (1) | JP3962668B2 (ja) |
KR (1) | KR100739902B1 (ja) |
CN (1) | CN100422424C (ja) |
TW (1) | TWI274092B (ja) |
WO (1) | WO2004029350A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100372989C (zh) * | 2004-05-10 | 2008-03-05 | 松下电器产业株式会社 | 洗衣机 |
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KR20050089355A (ko) * | 2004-03-04 | 2005-09-08 | 엘지전자 주식회사 | 대용량 드럼세탁기용 비엘디시 모터 |
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- 2003-06-26 EP EP03738535A patent/EP1561851A4/en not_active Withdrawn
- 2003-06-26 KR KR1020057004967A patent/KR100739902B1/ko active IP Right Grant
- 2003-06-26 CN CNB038225301A patent/CN100422424C/zh not_active Expired - Lifetime
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Also Published As
Publication number | Publication date |
---|---|
JP3962668B2 (ja) | 2007-08-22 |
KR100739902B1 (ko) | 2007-07-13 |
CN100422424C (zh) | 2008-10-01 |
CN1685101A (zh) | 2005-10-19 |
JP2004113286A (ja) | 2004-04-15 |
EP1561851A8 (en) | 2005-11-09 |
US20060021392A1 (en) | 2006-02-02 |
TWI274092B (en) | 2007-02-21 |
US8196440B2 (en) | 2012-06-12 |
KR20050046805A (ko) | 2005-05-18 |
TW200404934A (en) | 2004-04-01 |
EP1561851A1 (en) | 2005-08-10 |
EP1561851A4 (en) | 2005-12-14 |
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