JP2001321591A - Drum washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drum washing machine by which a user can optimally set the weight of a detergent to be supplied when the detergent is automatically supplied by a detergent supplier. SOLUTION: Before water is supplied into a water receiving tank, a controller once executes weight detection S1 (step A2) and measures the cloth weight W1 based on the result of the detection S1 (steps A3, A11, A22, A33) and then sets the weight of a detergent to be supplied and directs a detergent supplier to supply the detergent at water supplying. The weight of cloth is measured again based on the result of washing weight detection S2 after water supplying (steps A6, A14, A25, A36) and the balance of the supplied water weight and the detergent weight is adjusted based on the result of comparing the cloth weight W1 and the cloth weight W2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drum type washing machine that performs washing by rotating a drum into which laundry is loaded around a horizontal axis.

[0002]

2. Description of the Related Art In a conventional drum type washing machine, a user is required to:
The amount of the detergent according to the amount of the laundry is determined according to the contents described in the instruction manual and the like, and the detergent is manually charged into the detergent charging case provided in the drum type washing machine. However, when the detergent is manually supplied as described above, the user has to determine and supply the detergent amount according to the amount of the laundry every time washing is performed, which is not convenient. . Also,
Since the amount of laundry is also estimated by the user's subjectivity, it cannot be said that it is accurate, and there is a problem that the amount of detergent input is often too large or small relative to the actual amount of laundry.

[0003]

SUMMARY OF THE INVENTION In order to solve such a problem, a drum type washing machine is provided with a detergent dispenser, which detects the weight of the laundry put into the drum and, based on the result of the detection. There is a type in which a detergent input amount is determined and automatically supplied to a detergent input device.

However, in this prior art, since the weight of the laundry is detected in a state before water supply, the weight cannot be accurately detected depending on the type (cloth, shape, etc.) or state of the laundry. There are cases. As a result, as in the case where the user manually inputs the detergent, there is a case where the amount of the supplied detergent is excessive or insufficient.

[0005] In particular, in the case of a drum type washing machine, when the amount of detergent supplied exceeds an appropriate amount, the excessively foamed detergent acts as a cushion for the laundry in the drum, so that washing can be sufficiently performed. Shows a tendency not to be performed. Under such circumstances, it is important to properly set the amount of the detergent to be used in order to perform good washing in the drum type washing machine.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a drum type washing machine capable of more appropriately setting a detergent input amount when a detergent is automatically input using a detergent input device. Is to provide.

[0007]

According to a first aspect of the present invention, there is provided a drum-type washing machine, comprising: a water tub into which water for washing is poured; A drum into which the detergent is charged, a detergent dispenser for automatically dispensing the detergent into the water receiving tank, a washing motor for rotating the drum about a horizontal axis, and a drive control for the washing motor. Before the water is supplied into the receiving tank, the weight of the laundry stored in the receiving tank is detected, and when the amount of the detergent to be introduced is set based on the detection result, the water is supplied into the water receiving tank. In the case where the detergent is put in by the detergent input device, the weight of the laundry is detected again after water is supplied into the water receiving tank, and the amount of water supplied in the water receiving tank based on the detection result. Control means for correcting the balance between the amount of the detergent and Characterized by comprising.

[0008] With this configuration, the control means detects the weight of the laundry once before water is supplied into the water receiving tank, and sets the amount of detergent to be supplied by the detergent dispenser based on the detection result. Detergent is added at the time of water supply. Then, the balance between the water supply amount and the detergent input amount is corrected based on the result of the laundry weight detection performed again after the water supply.

For example, if the laundry stored in the drum is wet from the beginning and contains water, the weight detection performed before water supply will detect a larger amount of laundry than it actually is. . After the water is supplied, the laundry in the drum absorbs water, so if weight detection is performed in this state, a lighter value than the weight detection result performed before water supply can be obtained (however, When the amount of water estimated to be absorbed by the laundry is excluded), more accurate weight can be detected for the laundry that is wet from the beginning.

[0010] Further, for example, it is supposed that the user additionally throws laundry into the drum during the water supply (or temporarily stops the water supply), and in such a case, the weight detection result after the water supply indicates the water supply. More than the previous weight detection result. Therefore, the control means compares the weight detection result before water supply and the weight detection result after water supply, and according to the result, by appropriately correcting the balance between the water supply amount and the detergent input amount after water supply,
Washing can be performed with a water supply amount and a detergent amount according to the actual weight of the laundry.

In this case, as set forth in claim 2, the control means may control the weight of the laundry detected after the water is supplied into the water receiving tub by the weight of the laundry detected before the water is supplied. It is preferable to add a detergent when the weight is larger than the weight. For example, as described above, when the user additionally loads laundry into the drum during water supply or the like, it is assumed that the weight of the laundry detected after water supply becomes larger. In such a case, the amount of detergent will be insufficient,
By adding the insufficient amount of detergent based on the weight detection result after water supply, washing can be performed well.

According to a third aspect of the present invention, the control means may be arranged such that the weight of the laundry detected after the water is supplied into the water receiving tub is the weight of the laundry detected before the water is supplied. When the number is smaller than the above, a part of the water stored in the water receiving tank may be drained. That is, as described above, when the laundry is wet and wet from the beginning and the weight detection result after water supply shows a smaller value, the laundry is set based on the weight detection result before water supply. The amount of supplied water will be excessive. Therefore, a part of the water in the water receiving tank is drained, so that the water supply amount is adjusted to be appropriate according to the weight of the laundry.

[0013] In this case, as described in claim 4, when a part of the water stored in the water receiving tank is drained, the control means may adjust the weight of the laundry detected after the water supply. It is preferable that the amount of detergent corresponding to the difference between the amount of detergent required in accordance with the amount of detergent remaining in the water receiving tank is additionally supplied.

That is, when the water stored in the water receiving tank is drained, the detergent dissolved in the water is also discharged with the drainage. Therefore, the amount of detergent remaining in the water receiving tank after draining may be insufficient for the required amount of detergent according to the weight of the laundry detected after water supply. Then, the control means causes the amount of detergent corresponding to the difference between the two to be additionally supplied, so that the balance between the water supply amount and the detergent amount is set appropriately even when draining is performed.

According to a fifth aspect of the present invention, there is provided a drum type washing machine, wherein a water receiving tank into which water for washing is poured, and a water receiving tank,
A drum into which laundry is put, a detergent feeder for automatically putting detergent into the water receiving tub, a washing motor that rotates the drum about a horizontal axis, and drive control of the washing motor, Before the water is supplied into the water receiving tank, the weight of the laundry stored in the water receiving tank is detected, and based on the detection result, the amount of the detergent to be supplied is smaller than a predetermined amount. When water is supplied into the water receiving tank, the detergent is injected by the detergent input device, and the amount of the detergent to be added is added according to the state in the water receiving tank after the water is supplied. Control means for adjusting.

That is, if the amount of detergent is determined based only on the result of weight detection before water supply, the amount of detergent may be determined to be excessive depending on the result of weight detection after water supply as described above. However, in such a case, a part of the water in the water receiving tank must be drained. Therefore, in claim 5, the control means sets the amount of detergent to be set based on the result of weight detection before water supply, smaller than a predetermined amount. Then, since the amount of the detergent to be added is adjusted according to the state of the water receiving tank after the water supply, the adjustment becomes easier.

In this case, as set forth in claim 6, water temperature detecting means for detecting the water temperature in the water receiving tank is provided, and the control means controls the amount of the detergent to be supplied as the water temperature detected by the water temperature detecting means becomes higher. May be adjusted so as to reduce the number.

In other words, when the water temperature is relatively high, the washing of the laundry becomes good and the washing power is improved, so that it is preferable to set the amount of the detergent to a small amount. Conversely, if the water temperature is relatively low, the soiling of the laundry becomes poor and the washing power is reduced, so that it is necessary to set the amount of the detergent to a relatively large value. Therefore, the control means appropriately adjusts the amount of the detergent to be supplied according to the water temperature, so that substantially the same cleaning power can be obtained even when the water temperature is different.

Further, as set forth in claim 7, there is provided a permeability detecting means for detecting the permeability of the water in the water receiving tank, and the control means is provided with a low permeability detected by the permeability detecting means. A configuration may be adopted in which the amount of the detergent is adjusted so as to increase.

That is, if, for example, an optical sensor or the like is used as the transmittance detecting means, the transmittance of the water in the water receiving tank can be detected based on the amount of light received by the light transmitted through the water in the water receiving tank. it can. If the light reception amount is relatively large and the water permeability is relatively high, the degree of soiling of the laundry is also estimated to be relatively small, so that the amount of detergent input may be set to be small. Further, when the light receiving amount is relatively small and the water permeability is relatively low, it is estimated that the degree of soiling of the laundry is relatively large. Therefore, it is preferable to set a relatively large amount of detergent. Therefore, the control means appropriately adjusts the amount of the detergent to be introduced based on the water permeability, so that the amount of the detergent according to the degree of soiling of the laundry is set.

In addition, as described in claim 8, a water level detecting means for detecting a water level in the water receiving tank is provided, and the control means rotates the drum after water is supplied into the water receiving tank,
When the water level in the water receiving tank detected by the water level detecting means is low, water may be additionally supplied and a detergent amount corresponding to the additional water supply may be supplied by the detergent dispenser.

That is, when the size of the laundry is large compared to the weight or when the material is relatively easy to absorb water, the water supplied into the water receiving tub is more absorbed by the laundry. As a result, the water level in the water receiving tank decreases.
If the water level decreases too much, washing may not be performed sufficiently. Therefore, it is desirable to additionally perform water supply. In that case, the concentration of detergent in the water receiving tank will decrease due to the increase in water supply,
The control means causes the detergent dispenser to supply a detergent amount corresponding to the additional water supply amount, thereby preventing a decrease in the cleaning power.

[0023]

FIG. 1 shows a first embodiment of the present invention.
This will be described with reference to FIGS. FIG. 4 is a perspective view showing a part of the drum type washing machine in a see-through manner, and FIG. 5 is a vertical sectional side view. The cabinet 1 is formed by combining steel plates in a rectangular box shape, and a circular opening 2 is formed in a front plate of the cabinet 1. A circular door 3 is rotatably mounted on the front plate of the cabinet 1.
The door is opened and closed based on a rotation operation of the door 3.

As shown in FIG. 5, a water receiving tank 5 is housed in the cabinet 1. The water receiving tank 5 has a cylindrical shape with a closed rear surface, and the water receiving tank 5 is connected to rods 7 of a plurality of suspensions 6. The cylinders 8 of the plurality of suspensions 6 are fixed to the bottom plate of the cabinet 1, and the plurality of suspensions 6 elastically support the water receiving tank 5 in a horizontal state where the axis is horizontal.

A circular opening 9 is formed in the water receiving tank 5, and a bellows 10 is interposed between a peripheral edge of the opening 9 and a peripheral edge of the front opening 2. The bellows 10 has a cylindrical shape, and the opening 2 and the opening 9 are watertightly connected via the bellows 10.

At the bottom of the water receiving tank 5, a cylindrical drain port 11 is provided.
Is fixed, the upper end of the drain port 11 communicates with the inside of the water receiving tank 5, and the lower end of the drain port 11 communicates with the outside of the cabinet 1. An electromagnetic drain valve 12 is mounted in the drain port 11, and the drain port 11 is opened and closed based on switching of the state of the drain valve 12.

A washing motor 13 is provided in the cabinet 1. The washing motor 13 is constituted by an outer rotor type three-phase DC brushless motor. That is, a cylindrical bracket 14 is fixed to the rear surface of the water receiving tank 5, and a stator core 15 is fixed to an outer peripheral portion of the bracket 14. A U-phase coil 15u, a V-phase coil 15v, and a W-phase coil 15w (see FIG. 6) are wound around each tooth of the stator core 15, respectively.

As shown in FIG. 5, two bearings 16 are mounted on the inner peripheral surface of the bracket 14.
The rotating shaft 17 is mounted on the inner peripheral surface of the. 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 rotor core 18 is fixed to the rear end of the rotating shaft 17. The rotor core 18 has a cylindrical shape with a closed rear surface, and a plurality of rotor magnets 19 are fixed to the inner peripheral surface of the rotor core 18.

A rotation sensor 20 (see FIG. 6) is mounted on the stator core 15. The rotation sensor 20 has a Hall IC 20u corresponding to the U-phase coil 15u and a Hall IC 20v corresponding to the V-phase coil 15v, and generates a U-phase rotation signal based on the rotation of the rotor core 18 facing the rotor magnet 19. Hu and V-phase rotation signals Hv are output.

A drum 21 is fixed to the rotating shaft 17 of the washing motor 13 as shown in FIG. The drum 21 has a cylindrical shape with a closed rear surface, and is coaxial with the water receiving tank 5 in a horizontal state. A plurality of dehydration holes 22 are formed in the entire peripheral plate of the drum 21, and a circular opening 23 is formed on the front surface of the drum 21. The opening 23 faces the rear of the opening 9 of the water receiving tank 5, and the opening 23 of the water receiving tank 5 is opened in the drum 21 with the door 3 opened.
The laundry (not shown) is supplied through the port.

As shown in FIG. 4, an electromagnetic water supply valve 24 is fixed behind the upper end of the 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 (not shown) via a water supply hose. The water supply output port of the water supply valve 24 is connected to a rectangular box-shaped water injection case 50.

The tap water supplied through the water supply valve 24 is
When water is injected into the water injection case 50, the water is introduced into the water receiving tank 5 via a water injection duct 51 connecting the water injection case 50 and the bellows 10. When the water supply output port is opened with the drain valve 12 closed, the tap water is injected into the water receiving tank 5 from the tap via the water supply valve 24, and the tap water is stored in the water receiving tank 5. You.

A water level sensor 25 (see FIG. 6) is provided in the water receiving tank 5. The water level sensor 25 has a conductive pole inserted slidably in the axial direction in the inner peripheral portion of the cylindrical coil, and slides the pole according to the water level in the water receiving tank 5. The lap amount in the axial direction is changed, and a water level signal having a frequency corresponding to the lap amount is output.

As shown in FIG. 5, a fan casing 26 is fixed to the ceiling plate of the cabinet 1 at the rear end. The fan casing 26 is of a spiral type having an exhaust port on the front surface and an intake port (both not shown) on the lower surface. A fan (not shown) is rotatably housed in the fan casing 26. ing. A fan motor 27 (see FIG. 6) is provided on the ceiling plate of the cabinet 1.
Has been fixed. The fan motor 27 is a capacitor induction motor, and the rotation shaft of the fan motor 27 is connected to the rotation shaft of the fan via a belt transmission mechanism (not shown).

On the rear surface of the water receiving tank 5, as shown in FIG.
A vertically long dehumidifying duct 28 is fixed. The lower end of the dehumidification duct 28 communicates with the inside of the water receiving tank 5, and the upper end of the dehumidification duct 28 is connected to the intake port of the fan casing 26. It is sucked into the casing 26.

A heater case 29 is fixed to the ceiling plate of the cabinet 1 in front of the fan casing 26, and a front end of the relay duct 30 is connected to a rear plate of the heater case 29. The rear end of the relay duct 30 is connected to the air outlet of the fan casing 26, and the air sucked into the fan casing 26
0 flows into the heater case 29. A heater 30 (see FIG. 6) is housed in the heater case 29, and the air flowing into the heater case 29 is
The air is warmed based on the heating.

As shown in FIG. 5, one end of a hot air duct 31 is connected to the front plate of the heater case 29. The other end of the hot air duct 31 penetrates the bellows 10 and communicates with the inside of the water receiving tank 5, and the hot air generated in the heater case 29 passes through the hot air duct 31 into the water receiving tank 5 and the drum 21. Released. 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.

An operation panel 32 is provided on the front plate of the cabinet 1.
Is fixed, and an operation switch 34 and the like (see FIG. 6) are mounted on the front surface of the operation panel 32. As shown in FIG. 5, a circuit box 35 is mounted on the rear surface of the operation panel 32, and a circuit board 36 is housed in the circuit box 35.

As shown in FIG. 4, a control device (control means) 37 is mounted on the circuit board 36. The control device 37 is mainly composed of a microcomputer, and the input terminals of the control device 37 include the rotation sensor 20,
A water level sensor 25 and an operation switch 34 are electrically connected, and a drain valve 12, a water supply valve 24, a fan motor 27, a heater 3
0 is electrically connected.

A control program for generating a PWM signal is recorded in an internal ROM of the control device 37.
Reference numeral 7 generates sinusoidal energization signals Du, Dv, and Dw by processing the rotation signals Hu and Hv from the rotation sensor 20 based on a control program. These energization signals D
u to Dw determine the drive timing and applied voltage of the washing motor 13, and are output to the inverter circuit unit 39.

The inverter circuit section 39 supplies the energization signals Du to
PWM that generates a drive signal (PWM signal) based on Dw
A gate drive circuit (both not shown) for outputting a gate signal to an M circuit, an IGBT constituting an inverter main circuit according to the drive signal, etc.
Washing motor 1 by three-phase bridge-connected IGBT
3 is energized to each of the phase coils 15u to 15w.

A power supply circuit section 40 for supplying drive power to the inverter circuit section 39 is mounted on the circuit board 36. One input terminal of the power supply circuit unit 40 is supplied with a commercial AC power supply 42 via a reactor 41.
The power supply circuit section 40 rectifies the commercial AC power supply 42 by a diode bridge and smoothes it by a capacitor to generate a high-voltage DC power supply and supply it to the inverter circuit section 39. In addition, the power supply circuit unit 40 also has a built-in switching regulator and the like, and generates a low-voltage DC power supply for driving the control device 37 and the like by stepping down the high-voltage DC power supply.

Next, the structure of the detergent dispenser 53 will be described with reference to FIG.
This will be described with reference to FIG. The detergent dispenser 53 is disposed above the ceiling plate of the cabinet 1 located above the above-described water injection case 50, and has a rectangular box-shaped mechanical section 54 containing mechanical components, and an upper part of the mechanical section 54. And a detergent case 55 arranged at the bottom. The detergent case 55 includes a tissue box-shaped storage unit 5 in which the detergent 56 is stored.
A detergent transport section 55b is provided below 5a.

A feed spring 57 for transporting the detergent is disposed inside the detergent transport section 55b. One end of the feed spring 57 (on the front side of the drum type washing machine) is provided with a detergent conveying section 55b.
Drive gear 5 so as to project from
8, the driving gear 58 of which is
4 is driven by a detergent feed motor 59 inside.

Further, a detergent discharge port 55c is provided in the detergent transport section 55b where the other end of the feed spring 58 (the rear side of the drum type washing machine) is located. The detergent outlet 55c
Is opened and closed by an on-off valve 60 inside the mechanical section 54. The on-off valve 60 usually has a valve drive mechanism 61.
The detergent discharge port 55c is closed by being urged by a spring (not shown) disposed in the inside. Then, the valve motor 62 inside the mechanical section 54 rotates,
When the driving force is transmitted to the valve driving mechanism 61 via the wire 63, the on-off valve 60 is driven against the urging force of the spring, and opens the detergent discharge port 55c.

When the detergent feed motor 59 rotates with the detergent discharge port 55c open, the feed spring 57 rotates,
The detergent 56 inside the detergent transport section 55b is transported from the front side to the rear side of the drum type washing machine by the feed spring 57,
The detergent discharge port 55c drops into the water injection case 50.

Next, the operation of the present embodiment will be described with reference to FIGS. FIG. 1 shows that the control device 37
6 is a flowchart showing the details of execution based on the operation control program recorded in M. Control device 37
Starts the process of FIG. 1 upon detecting that the operation start is instructed based on the output signal from the operation switch 34 after the power is turned on.

The control device 37 first outputs the activation energizing signals Du to Dv to the inverter circuit section 39,
When the washing motor 13 is started to start the rotation of the drum 21 (step A1), subsequently, the weight of the laundry is detected (S1).
Perform 1) (Step A2). The method of detecting the weight here is described in, for example, Japanese Patent Application No. 11-36967, and the outline thereof will be described below.

FIG. 2 shows an example of a driving pattern of the washing motor 13 for obtaining the weight detection result S1.
The control device 37 determines that the rotation speed of the washing motor 13 is 100 rpm.
m until it reaches m. In this case, the peak values of the energization signals Du to Dw are sequentially increased so that the duty ratio of the gate signal applied to the IGBT of the inverter circuit unit 39 gradually increases. When it is detected that the rotation speed has reached 100 rms and is stable, the duty ratio of the gate signal is fixed as it is, and an imbalance detection in the water receiving tank 5 is performed prior to the weight detection.

In the unbalance detection, the control device 37 first determines that the rotation position of the rotor of the washing motor 13 is an electrical angle (36).
The time Tn required to advance by 0 ° / 4) is detected 12 times and recorded in the RAM. For example, when the electrical angle 360 ° of the washing motor 13 corresponds to the mechanical angle 30 °, the control device 3
Numeral 7 measures the rotation time Tn once at a fixed timing (for example, between 180 ° and 270 ° electrical angle) of the electrical angle 360 °. Therefore, while the washing motor 13 makes one rotation mechanically, twelve data of the rotation times T1 to T12 are recorded in the RAM.

Subsequently, the control device 37 determines the rotation times T1 to T
When the average rotation time T (ave) is calculated by averaging 12, the sum of the deviations between the rotation times T1 to T12 and the average rotation time T (ave) is detected as rotation unevenness A. Rotation unevenness A is the reference value Ao
If it is larger, the weight of the laundry is extremely large,
It is estimated that the distribution is unbalanced in the drum 21. At this time, the weight of the laundry is set to a "large amount" of 4 to 7 kg. If the uneven rotation A is equal to or smaller than the reference value Ao, weight detection is performed.

When the control device 37 accelerates the washing motor 13 after detecting the imbalance and increases the rotation speed to 420 rpm, the control device 37 detects an acceleration time T1 from that time until reaching 650 rpm. This acceleration time T1 is stored in ROM
If the value is larger than the reference value To1 (for example, 10 seconds) recorded in the above, the weight of the laundry is set to “large amount” at this time as well.

On the other hand, if the acceleration time T1 is equal to or less than the reference value To1, the control device 37 determines that the rotation speed of the
When it is detected that the rotation speed has reached 0 rpm, the washing motor 13 is turned off to perform idling operation (inertial operation). Then, a deceleration time T2 until the rotation speed of the washing motor 13 decreases from 650 rpm to 420 rpm is detected. Then, a weight detection result S1 is obtained based on the calculation of the following equation (1). S1 = (T1 × T2) / (T1 + T2) (1)

As described above, when the weight detection result S1 is obtained in step A2, the control device 37 sets the weight range of the laundry to 4 according to the results of the uneven rotation A and the weight detection result S1.
Classify into stages. Here, the amount of laundry classified by weight is referred to as a laundry amount, and the execution step from step A2 branches to A3, A11, A22, and A33 for each laundry amount.

Then, each step A4, A12, A2
In A3 and A34, a predetermined amount of detergent is set for each amount of cloth, and the detergent is input by the detergent dispenser 53. In subsequent steps A5, A13, A24, and A35, each amount of cloth is changed. Water supply is performed with a predetermined water supply amount set. The above is shown in the following list. Weight range Cloth amount Detergent input Water supply amount 1 kg or less Very small 10 g 7 L 1 kg to 2 kg Small amount 15 g 13 L 2 kg to 4 kg Medium 25 g 25 L 4 kg or more Large 40 g 45 L

Subsequent steps A6, A14, A25, A
36, the weight is detected again after the water supply (S
2) is performed. Here, the method of weight detection (S2) will be described with reference to FIG. In the weight detection (S2), from the state where the washing motor 13 is stationary, a gate signal having a constant duty is given to perform normal rotation, and it is checked whether or not the rotation speed reaches 50 rpm. That is, the initial value of the duty is set to a small value, and if it does not reach 50 rpm, the duty is increased next time, and it is reversed this time to see whether or not the rotation speed reaches 50 rpm.

The above process is repeated alternately between normal rotation and reverse rotation. If the rotation speed exceeds 50 rpm, the duty is reduced. Then, four times of duties (SR1, SL1, SR2 and SL2 shown in FIG. 2) are sampled from the time when the number of revolutions of the washing motor 13 has just reached 50 rpm, and the average thereof is obtained as the weight detection result S2. . That is, the weight detection result S2 is obtained by the equation (2). S2 = (SR1 + SL1 + SR2 + SL2) / 4 (2) That is, the magnitude of the duty of the gate signal is determined by the washing motor 1
Since it is proportional to the torque of No. 3, the weight of the laundry can be estimated based on the duty.

The weight detection result S2 is a value reflecting the weight of the laundry in a state where the water is supplied and the water is absorbed, and the water supply amount and the laundry in each of steps A5, A13, A24, and A35 are reflected. From the approximate water absorption rate, the weight of only the laundry included in the detection result S2 can be estimated.

As described above, each step A6, A1
When the weight detection result S2 is obtained in 4, A25, and A36, the control device 37 also sets the cloth amount in four stages of “extremely small”, “small amount”, “medium amount”, and “large amount” for the weight detection result S2. Classify. Then, two detection results S1 and S2
The cloth amount is re-determined by comparing the magnitude relation of the obtained cloth amounts (the cloth amount W1 and the cloth amount W2, respectively).

For example, it is determined in step A3 that the cloth amount W1 is "extremely small", and if the cloth amount W2 based on the detection result S2 is also "extremely small", the cloth amount is determined to be "extremely small" (step A7). In this case, the washing operation is continued without adding water or a detergent (step A41).

The cloth amount W2 is "small", and the cloth amount W
If it is larger than one, it is used to change the cloth amount to "small" (step A8). This is, for example, when the user supplies water (or temporarily stops supplying water).
It is assumed that laundry is additionally thrown into the drum 21.

Since the cloth amount is changed to "small amount" in step A8, the water supply amount and the detergent amount are insufficient. Therefore, the control device 37 causes an additional 6 L of water to be supplied to compensate for the shortage (step A).
9) An additional 5 g of detergent is added (step A10).
Then, the process proceeds to step A41.

If it is determined in step A11 that the cloth amount W1 is "small", and if the cloth amount W2 is also determined to be "small" in step A14, the cloth amount is determined to be "small" (step A18). The process proceeds to Step A41 without adding water or a detergent. If the cloth amount W2 is "extremely small" in step A14 and is smaller than the cloth amount W1, for example, since the laundry has already been wet before the water supply, the cloth amount W1 is increased. It is possible that the judgment has been made. Therefore, in such a case, the amount of cloth is corrected to “minimum” by adopting the method (step A15).

By changing the cloth amount to "extremely small" in step A15, the current water supply amount 13L is excessive. Then, the control device 37 performs drainage for 6 L and adjusts the water supply amount to 7 L of “minimal” (step A1).
6). At this time, following drainage, step A
Part of the detergent introduced at 12 is also discharged.
The emission amount is estimated to be 15 × 6/13 = 7 g.
Therefore, the amount of remaining detergent is 15-7 = 8 g.

In the case of "extremely small amount", the amount of the detergent to be added is 10 g, which means that 2 g is insufficient. Therefore, the control device 37 adjusts so that 2 g of the detergent is additionally introduced and the amount is adjusted to 10 g of “minimal” (step A17). Then, control goes to a step A41.

If the cloth amount W2 determined in step A14 is “medium amount” and is larger than the cloth amount W1 determined in step A11, the cloth amount is adopted to reduce the cloth amount to “medium amount”. "(Step A19). If the cloth amount is changed to “medium amount”, the water supply amount and the detergent amount become insufficient. Therefore, the control device 37 causes an additional 12 L of water supply to reduce the water supply amount to 25 L (step A20) and additionally inputs 10 g of detergent. To 25 g of detergent (Step A)
21). Then, the process proceeds to step A41. When the cloth amount W1 is determined to be "medium amount" in step A22, the cloth amount is similarly determined to be "medium amount" according to the cloth amount W2 determined in step A25 (step A22).
29), and is changed to "small" or "large" (steps A26, A30).

When the cloth amount is changed to "small" in step A26, the control device 37 performs drainage for 12L and adjusts the water supply amount to "small" 13L (step A2).
7). Also in this case, since 12 g of the detergent was discharged (25 × 12/25 =) due to the drainage, 2 g was added to the remaining detergent amount (15-12 =) of 13 g. The adjustment is performed so as to match the "small amount" of 15 g (step A28). Then, control goes to a step A41.

When the amount of cloth is changed to "large" in step A30, the control device 37 causes an additional 20L of water to be supplied to reduce the water supply to 45L (step A30).
31) An additional 15 g of detergent is added to reduce the amount of detergent to 40 g (step A32). Then, the process proceeds to step A41.

Further, when the cloth amount W1 is determined to be "large" in step A33, the cloth amount is determined to be "large" according to the cloth amount W2 determined in step A36 (step A40) or "medium". To "Amount" (Step A
37).

When the cloth amount is changed to "medium amount" in step A37, the control device 37 performs drainage for 20L and adjusts the water supply amount to "medium amount" of 25L (step A3).
8). Also in this case, 18 g of the detergent (40 × 20/45 =) was discharged due to the drainage, so 3 g was added to the remaining detergent amount (40−18 =) 22 g. Is adjusted so as to match the "medium weight" of 25 g (step A39). Then, control goes to a step A41.

Although not specifically shown in step A41 and thereafter, after performing the rinsing operation and the dehydration operation, the control device 37 drives the fan motor 27 and the heater 30 while the washing motor 13 is driven. Based on this, warm air is flown into the drum 21 to promote drying of the laundry. At this time, tap water is injected into the dehumidification duct 28 based on opening the dehumidification water port of the water supply valve 24,
The high-temperature moisture flowing in the dehumidification duct 28 is dehumidified by condensing it with low-temperature tap water. Thus, a series of steps from washing to drying is completed.

As described above, according to the present embodiment, the control device 37 performs the laundry weight detection S1 once before water is supplied into the water receiving tub 5, and based on the detection result S1, the laundry amount W1 And the amount of detergent to be introduced by the detergent dispenser 53 is set, and the detergent is introduced when water is supplied. Then, the laundry amount W2 is obtained based on the result S2 of the laundry weight detection performed again after the water supply, and the balance between the water supply amount and the detergent input amount is determined based on the result of comparing the laundry amount W1 and the laundry amount W2. It was corrected.

Therefore, washing can be performed with the amount of water supplied and the amount of detergent according to the actual weight of the laundry. In the case of the drum type washing machine, when the amount of the supplied detergent is larger than an appropriate value, the excessively foamed detergent acts as a cushion for the laundry in the drum 21 so that the washing is sufficiently performed. Since the weight may be lost, the weight of the laundry is detected, and the detergent is automatically supplied by the detergent dispenser 53 according to the weight, so that the laundry can be favorably washed with an appropriate amount of the detergent. Become.

The control device 37 adds the detergent when the weight of the laundry detected after the water is supplied into the water receiving tub 5 is larger than the weight of the laundry detected before the water is supplied. Since washing is performed, washing can be performed well by additionally feeding the insufficient amount of detergent.

Further, the controller 37 stores the water in the water receiving tank 5 when the cloth amount W2 detected after the water is supplied into the water receiving tank 5 is smaller than the cloth amount W1 detected before the water supply. Since a part of the water is drained, the amount of water supply can be adjusted to be an appropriate value according to the weight of the laundry. When drainage is performed, an additional amount of detergent corresponding to the difference between the amount of detergent required according to the cloth amount W2 after water supply and the amount of detergent remaining in the water receiving tank 5 is added. Therefore, the balance between the water supply amount and the detergent amount can be appropriately set.

FIG. 7 shows a second embodiment of the present invention. The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Only different parts will be described below. The configuration of the second embodiment is basically the same as that of the first embodiment, and the processing contents in the control device 37 are different.

That is, the control device 37 determines at each step A4
In a, A12a, A23a, and A34a, 1/2 of the predetermined detergent input amount is set for each cloth amount, and the detergent is input by the detergent input device 53, and the subsequent step A5
In a, A13a, A24a, and A35a, 1/2 of a predetermined water supply amount is set for each cloth amount, and water is supplied. That is, the list is as follows. Amount of cloth Detergent input Amount of water supply Extremely small 5 g 3.5 L Small 7.5 g 6.5 L Medium 12.5 g 12.5 L Large 20 g 22.5 L

Then, for example, after step A7 in which the cloth amount is determined to be “minimum”, the control device 37 sets the remaining １ ／
(Step A42), and the remaining 1/2 of the amount of detergent is supplied (Step A43). Also, after step A8 in which the amount of cloth is changed from “very small” to “small”,
Water supply of 9.5 L, which is the sum of the remaining 1/2 water supply amount 3.5 L of “extremely small amount” and the shortage 6 L of water supply amount of “small amount” is performed (step A 9 a). Then, 10 g of detergent, which is the sum of 5 g of the remaining 1/2 of the "extremely small amount" of the detergent and 5 g of the shortage with respect to the "small amount" of the detergent, is added (step A10a).

Similarly, after the step A18 in which the cloth amount is determined to be "small", the control device 37 supplies the remaining 1/2 of the water (step A44) and inputs the remaining 1/2 of the detergent amount. (Step A45). Then, after step A15 in which the cloth amount is changed from “small” to “minimal”, the current water supply amount is 6.5L and the water supply amount corresponding to “minimum” is 7L.
Water is supplied by 0.5 L, which is the difference from
6a). Then, 2.5 g of detergent, which is the difference between the current amount of detergent of 7.5 g and the amount of detergent corresponding to "extremely small" of 10 g, is additionally introduced (step A17a).

After step A19 in which the cloth amount is changed from “small” to “medium”, 18.5L of the difference between the current water supply of 6.5L and the “medium” water supply of 25L is obtained. Water is supplied (step A20a), and then 17.5g of detergent, which is the difference between the current detergent dosage of 7.5g and the "medium" detergent amount of 25g, is additionally injected (step A21).
a).

Similarly, after step A29 in which the cloth amount is determined to be "medium amount", the control device 37 causes the remaining 1/2 of the water to be supplied and the detergent to be supplied (steps A46 and A4).
7). Step A2 in which the cloth amount is changed to "small amount"
After Step 6, water is supplied by 0.5 L from the water supply amount 13 L corresponding to “small amount” (Step A27a), and 2.5 g of detergent, which is the difference from the detergent amount of 15 g, is added (Step A28a). ). Further, after step A30 in which the cloth amount is changed to "large", 32.5 L of water is supplied, which is the difference from the "large" water supply amount of 45 L (step A31).
a), 27.5 g of detergent, which is the difference from the detergent amount of 40 g, is added (step A32a).

After the step A40 in which the cloth amount is determined to be "large", the control device 37 causes the remaining 1/2 of the water to be supplied and the detergent to be supplied (steps A48 and A49), and sets the cloth amount to " After the step A37 changed to “medium volume”, water supply is performed by a difference 2.5L from the water supply amount 25L (step A37).
38a), 5 g of detergent, which is the difference from the detergent amount of 25 g, is added (step A29a).

As described above, according to the second embodiment, the control device 37 determines the cloth amount W1 based on the result S1 of detecting the weight of the laundry performed before the water is supplied into the water receiving tub 5.
Only 1/2 of the amount of detergent, which is predetermined according to the cloth amount W1, is supplied, and water is supplied only by 1/2 of the predetermined amount, and the cloth amount W2 is determined based on the weight detection result S2 performed after water supply. Then, based on the result of comparing the cloth amount W1 and the cloth amount W2, the water supply amount and the detergent input amount are additionally adjusted.

That is, if the amount of detergent is determined based on only the weight detection result S1 before water supply and the detergent is injected, it is determined that the input amount is excessive based on the weight detection result S2 after water supply. At this time, as in the first embodiment, a part of the water in the water receiving tank 5 must be drained to cope with the situation. In the second embodiment, by performing the control as described above, it is not necessary to perform drainage even when the cloth amount is changed to a small amount. Therefore, the adjustment of the amount of the detergent to be introduced becomes easier, and the water and the detergent are removed. Unnecessary discharge can be prevented, so that these can be used economically.

FIGS. 8 and 9 show a third embodiment of the present invention. The same parts as those in the first and second embodiments are denoted by the same reference numerals, and the description thereof will be omitted. explain. FIG. 8 is a view in which a part of the drum type washing machine is seen through from the rear side. On the back side of the water receiving tank 5, a case 65 of a heat exchanger formed in a substantially arc shape used in the drying operation is arranged. A thermistor (water temperature detecting means) 66 for detecting the temperature of the water stored in the water receiving tank 5 is attached inside the water receiving tank 5 corresponding to the tip of the case 65.

An optical sensor 67 is provided below the water receiving tank 5.
Is arranged. Although not specifically shown, the optical sensor 67 causes the light receiving element such as a phototransistor to receive the light emitted from the light emitting element such as an LED via the water in the water receiving tank 5, and the light receiving intensity makes it possible to contaminate the water. It is arranged to detect the degree (however, this optical sensor 67 is used in the following fourth embodiment). The detection signals of the thermistor 66 and the optical sensor 67 are provided to the control device 37.

Next, the operation of the third embodiment will be described with reference to FIG. After the weight detection result S1 in step A2, each of steps A5a, A13a, A24a, A
The processing up to 35a is executed in the same manner as in the second embodiment. In the following steps B1, B11, B21 and B31, the control device 37 detects the temperature S3 of the water supplied to the water receiving tank 5 by the thermistor 66. And each step B
After the detection of the water temperature at 1, B11, B21, and B31,
Processing is divided depending on whether the detected water temperature belongs to a temperature range of 10 ° C or lower (low temperature), higher than 10 ° C and lower than 25 ° C (medium temperature), or 25 ° C or higher (high temperature).

For example, when the cloth amount is "minimal" and the water temperature is medium temperature (step B5), after supplying water of 5 L which is the remaining 1/2 (step B6), the remaining 1/2 is supplied. An additional 5 g of detergent is added (step B7). If the water temperature is low (step B2), after supplying 5 L of water (step B3), 8 g of detergent is additionally introduced (step B4). This means that when the temperature of the water drops,
The dirt adhering to the laundry hardly dissolves in the water and the washing ability is relatively reduced. Therefore, the washing ability is improved by adding 3 g more detergent than the standard.

On the other hand, if the water temperature is high (step B
8) After supplying 5 L of water (step B9), 2 g of detergent is additionally charged (step B10). That is, if the temperature of the water becomes higher, the cleaning ability is relatively improved, so that at least the washing amount can be sufficiently performed compared to the standard amount of the detergent. Therefore, the detergent is additionally introduced so that the amount of the detergent is 3 g less than the standard amount.

Also, when the cloth amount is "small", if the water temperature is medium temperature (step B15), after supplying 6.5 L of water, which is the remaining half (step B16), the remaining 1 is supplied. Then, 7.5 g of a detergent of / 2 is added (step B17). If the water temperature is low (step B1)
2) After supplying 6.5 L of water (Step B13) 1
An additional 2.5 g of detergent is added so that the input amount becomes 5 g larger than the standard (step B14). If the water temperature is high (Step B18), after supplying 6.5 L of water (Step B19), 3 g of detergent is additionally introduced,
The amount of the detergent is set to be 4.5 g less than the standard (step B20).

Similarly, when the cloth amount is “medium amount”, if the water temperature is medium temperature (step B25), the remaining half is supplied with 12.5 L of water (step B26), and then the remaining one is supplied. Then, 12.5 g of a detergent of / 2 is added (step B27). If the water temperature is low (step B
22) After supplying 12.5 L of water (step B2
3) An additional 20 g of detergent is added, and the amount of addition is 7.
The amount is increased by 5 g (step B24). And
If the water temperature is high (step B28), after supplying 12.5 L of water (step B29), 5 g of detergent is additionally charged so that the amount of detergent is 7.5 g less than the standard (step B30). ).

Further, when the cloth amount is "large", if the water temperature is medium temperature (step B35), the remaining half is 2
After supplying 2.5 L of water (step B36), the remaining 1
/ G of 20 g of detergent (step B)
37). If the water temperature is low (step B3
2) After supplying 22.5 L of water (Step B33)
An additional 30 g of detergent is added so that the input amount becomes 10 g larger than the standard (step B34). Then, if the water temperature is high (step B38), after supplying 22.5 L of water (step B39), 5.5 g of detergent is additionally charged, so that the amount of detergent is 14.5 g less than the standard. (Step B40).

As described above, according to the third embodiment, when the water temperature detected by the thermistor 66 is low, the control device 37 sets the amount of the detergent to be higher than the standard, and the water temperature is controlled. When it is high, the amount of detergent to be introduced is set to be smaller than the standard, so that an appropriate amount of detergent corresponding to a different cleaning ability can be introduced according to the water temperature to make the washing ability substantially constant. In addition, the detergent can be economically used without waste.

FIG. 10 shows a fourth embodiment of the present invention. Only parts different from the first to third embodiments will be described. In the fourth embodiment, the control device 37 replaces the thermistor 66 with the optical sensor (transmittance detecting means) shown in FIG.
The control is performed using 67. Then, in the flowchart shown in FIG. 10, steps B1, B2, B
5, B8, B11, B12, B15, B18, B21,
B22, B25, B28, B31, B32, B35, B
38 are replaced by the same numbers in “Step C”, respectively, and such a portion corresponds to a control portion using the optical sensor 67 instead of the thermistor 66.

That is, after the weight detection result S1 in step A2, each of steps A5a, A13a, A24a, A
The processing up to 35a is executed in the same manner as in the third embodiment. In the following steps C1, C11, C21, and C31, the control device 37 detects the transmittance S3 of the water supplied to the water receiving tank 5 by the optical sensor 67. And each step C
After detection of the water temperature at 1, C11, C21, C31,
The degree of water contamination is "large" according to the detected transmittance,
The processing is divided depending on which of “normal” and “slightly” ranges belong.

In other words, when the water permeability in the water receiving tub 5 is low, the degree of soiling of the laundry is high, and it is assumed that a relatively large amount of soil components are dissolved in the water. Is required. Conversely, when the water permeability is high, the degree of soiling of the laundry is small, and it is assumed that the components of the soil dissolved in the water are relatively small, so that the detergency may be relatively low.

For example, when the cloth amount is "minimal" and the degree of dirt is normal (step C5), steps B6 and B7 are executed in the same manner as in the third embodiment, and the degree of dirt is higher. If there is any (Step C2), it is presumed that the cleaning ability has decreased, so that Step B
3 and B4 are executed. If the degree of dirt is relatively small (step C8), steps B9 and B10 are executed because the cleaning ability is estimated to be relatively high.

When the cloth amount is "small", the degree of dirt is normal (step C15) and large (step C15).
12), depending on the case (step C18), the number of steps B13, B14, B
16 and B17, B19 and B20 are executed respectively, and even when the cloth amount is “medium amount”, the degree of contamination is normal (step C25), large (step C22), and small (step C28). Steps B23 and B24, B26 and B27, B29 and B30 are executed accordingly. In addition, even when the cloth amount is "large", the degree of dirt is normal (step C35) and large (step C3).
2), depending on each case (step C38), steps B33 and B34, B36 and B37, B
39 and B40 are executed respectively.

As described above, according to the fourth embodiment, when the permeability of the water in the water receiving tank 5 detected by the optical sensor 67 is low, the control device 37 sets the amount of the supplied detergent to be lower than the standard. It is set to be higher, and when the transmittance is high, the amount of detergent is set to be smaller than the standard, so
The amount of detergent according to the degree of soiling of the laundry can be set appropriately.

FIG. 11 shows a fifth embodiment of the present invention. Only parts different from the first embodiment will be described.
In the fifth embodiment, the control device 37 classifies cases based on the cloth amount W1 determined from the weight detection result S1 in step A2, and then performs steps A5, A13, A24, A
In 35, when water is supplied based on the water supply amount predetermined for each cloth amount, the following steps D1, D4, D7,
In D10, the drum 21 is rotated left and right (forward / backward) by several rotations and then temporarily stopped. Then, the water level in the water receiving tank 5 is detected by the water level sensor (water level detecting means) 25, and when the water level is lowered, the water supply is added by the reduced amount (steps D2, D5, D8, D11).

That is, by rotating the drum 21 after water is supplied, the laundry in the drum 21 absorbs the water in the water receiving tub 5. Water level drops. If the washing operation is performed in a state where the water level in the water receiving tank 5 is kept low, the washing may be insufficient. To prevent such a situation, the water supply is added by the amount corresponding to the lowered water level. .

Further, when the supply of water is additionally performed, the concentration of the detergent in the water receiving tank 5 is reduced accordingly. Therefore, in the following steps D3, D6, D9, and D12,
The control device 37 performs the additional introduction of the detergent by an amount corresponding to the addition of the water supply. For example, in a case where the cloth amount of A22 to A24 is “medium amount”, assuming that the water supply amount added in step D8 is 2 L, the control device 37 adds 2 g of the detergent in step D9, and The concentration is maintained as before the addition of the water supply.

As described above, according to the fifth embodiment, after the water is supplied into the water receiving tank 5, the control device 37
Of the drum 21 detected by the water level sensor 25
When the water level in the inside is low, water is additionally supplied, and a detergent amount corresponding to the added water amount is supplied by the detergent dispenser 53.

Therefore, it is possible to compensate for a decrease in the water level by the amount of water absorbed by the laundry, and even if the amount of supplied water increases,
Since the concentration of the detergent inside does not decrease, it is possible to prevent a decrease in the detergency as a whole, and to sufficiently perform the washing operation.

The present invention is not limited to the embodiment described above and shown in the drawings, and the following modifications or extensions are possible. In the second to fourth embodiments, the amount of water to be supplied and the amount of detergent to be supplied first according to the cloth amount W1 are not limited to の of the predetermined value, but are set in accordance with the range of the cloth amount and accordingly. It may be set smaller based on the relationship between the water supply amount and the predetermined value of the detergent input amount. In the third embodiment, a predetermined amount according to the cloth amount W1 may be entirely supplied from the beginning. The third embodiment and the second embodiment may be implemented in combination. The fifth embodiment may be performed in combination with any of the first to fourth embodiments.

[0106]

Since the present invention is as described above,
The following effects are obtained. According to the drum-type washing machine of the first aspect, the control means detects the weight of the laundry once before the water is supplied into the water receiving tub, and inputs the detergent by the detergent dispenser based on the detection result. When the amount is set, detergent is added at the time of water supply. Then, since the balance between the water supply amount and the detergent input amount is corrected based on the result of performing the laundry weight detection again after the water supply, the washing is performed with the water supply amount and the detergent amount according to the actual laundry weight. It becomes possible.

According to the drum type washing machine of the second aspect,
The control means causes the detergent to be added when the weight of the laundry detected after the water is supplied into the water receiving tank is larger than the weight of the laundry detected before the water is supplied. Even if the weight is not accurately detected and the weight is detected to be small and the amount of detergent is insufficient, washing can be performed well by additionally adding the detergent.

According to the drum type washing machine of the third aspect,
The control means is stored in the water receiving tank when the weight of the laundry detected after water is supplied in the water receiving tank is smaller than the weight of the laundry detected before water is supplied. Drains some of the water that is present, even if the weight of the laundry is changed to a smaller value according to the weight detection result after water supply,
The amount of water supply can be adjusted to be appropriate according to the weight of the laundry.

According to the drum type washing machine of the fourth aspect,
The control means, when draining part of the water stored in the water receiving tank, the amount of detergent required according to the weight of the laundry detected after water supply, and the amount of detergent in the water receiving tank. Since the amount of the detergent corresponding to the difference between the remaining detergent amount is additionally supplied, the balance between the water supply amount and the detergent amount can be properly set even when draining is performed.

According to the drum type washing machine of the fifth aspect,
The control means detects the weight of the laundry stored in the water receiving tank before water is supplied to the water receiving tank, and based on the detection result, determines the amount of the detergent to be supplied by a predetermined amount. Since the amount of detergent added was adjusted according to the state in the water receiving tank after water supply was set, the amount of detergent was excessive according to the weight detection result after water supply. Even when this is found, the adjustment of the amount of the detergent can be easily performed. Also, it is possible to use the detergent more economically.

According to the drum type washing machine of the sixth aspect,
The control means adjusts so that the higher the water temperature detected by the water temperature detection means, the smaller the amount of the detergent to be supplied, so that substantially the same cleaning power can be obtained even when the water temperatures are different.

According to the drum type washing machine of the seventh aspect,
The control means adjusts so that the permeability of the water stored in the water receiving tank, which is detected by the permeability detection means, decreases as the permeability of the detergent increases, so that the detergent according to the degree of soiling of the laundry is adjusted. Can be set appropriately.

[0113] According to the drum type washing machine of the eighth aspect,
The control means rotates the drum after the water is supplied into the water receiving tank, and additionally performs the water supply when the water level in the water receiving tank detected by the water level detecting means is low. The amount of detergent corresponding to the amount of water supply is introduced by the detergent dispenser. Therefore, it is possible to compensate for a decrease in the water level by the amount of water absorbed by the laundry, and to prevent a decrease in the cleaning power as a whole and to sufficiently perform the washing operation because the concentration of the detergent in the water receiving tank does not decrease even if the amount of supplied water increases. Can be performed well.

[Brief description of the drawings]

FIG. 1 is a first embodiment of the present invention, and is a flowchart showing control executed by a control device of a drum type washing machine;

FIG. 2 is a diagram showing an example of a driving pattern of a washing motor when a weight detection result S1 is obtained.

FIG. 3 is a diagram showing an example of a driving pattern of a washing motor when a weight detection result S2 is obtained.

FIG. 4 is a perspective view showing a part of the drum type washing machine in a see-through manner.

FIG. 5 is a vertical sectional side view of the drum type washing machine.

FIG. 6 is a functional block diagram showing an electrical configuration.

FIG. 7 is a view corresponding to FIG. 1, showing a second embodiment of the present invention.

FIG. 8 is a third embodiment of the present invention, and is a view in which a part of a drum type washing machine is seen through from the rear side.

FIG. 9 is a diagram corresponding to FIG. 1;

FIG. 10 is a view corresponding to FIG. 1, showing a fourth embodiment of the present invention;

FIG. 11 is a view corresponding to FIG. 1, showing a fifth embodiment of the present invention.

[Explanation of symbols]

5 is a water receiving tank, 13 is a washing motor, 21 is a drum, 25 is a water level sensor (water level detecting means), 37 is a control device (control means), 53 is a detergent dispenser, 66 is a thermistor (water temperature detecting means), 67 is 4 shows an optical sensor (transmittance detecting means).

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Satoshi Nishiwaki 991 Anada-cho, Seto-shi, Aichi F-term in Ashi Plant, Toshiba Corporation (reference) 3B155 AA21 BB14 BB19 CA02 CB07 GB02 GB05 GB10 HC07 KA02 KA12 KA15 KA19 KB09 KB14 LA00 LB31 LB34 LC08 LC28 MA01 MA07 MA08

Claims (8)

[Claims] 1. A water receiving tank into which water for washing is poured, a drum housed in the water receiving tank and into which laundry is put, and a detergent input for automatically putting detergent into the water receiving tank. A washing motor for rotating the drum about a horizontal axis; and controlling the driving of the washing motor and the laundry stored in the water tub before water is supplied to the water tub. When the amount of detergent is set based on the detection result, when water is supplied into the water receiving tank, the detergent is introduced by the detergent dispenser and the water is supplied into the water receiving tank. After that, the weight of the laundry is detected again,
A drum type washing machine comprising: control means for correcting the balance between the amount of water supplied in the water receiving tank and the amount of the detergent charged based on the detection result. 2. The control device according to claim 1, wherein the weight of the laundry detected after the water is supplied into the water receiving tank is larger than the weight of the laundry detected before the water is supplied. The drum type washing machine according to claim 1, wherein the drum type washing machine is additionally charged. 3. The control device according to claim 1, wherein the weight of the laundry detected after the water is supplied into the water receiving tub is smaller than the weight of the laundry detected before the water is supplied. 3. The drum type washing machine according to claim 1, wherein a part of water stored in the tub is drained. 4. The control means, when a part of the water stored in the water receiving tank is drained, a detergent amount required according to the weight of the laundry detected after water supply, 4. The drum type washing machine according to claim 3, wherein an amount of detergent corresponding to a difference from an amount of detergent remaining in the water receiving tank is additionally charged. 5. A water receiving tank into which water for washing is poured, a drum housed in the water receiving tank and into which laundry is put, and a detergent input for automatically putting detergent into the water receiving tank. A washing motor for rotating the drum about a horizontal axis; and controlling the driving of the washing motor and the laundry stored in the water tub before water is supplied to the water tub. Weight detection, and based on the detection result, set the amount of detergent to be smaller than a predetermined amount, and when the water is supplied into the water receiving tank, the detergent is injected by the detergent injector. And a control means for adjusting the amount of detergent to be added in accordance with the state in the water receiving tank after water is supplied. 6. A water temperature detecting means for detecting a water temperature in a water receiving tank, wherein the control means adjusts so that the higher the water temperature detected by the water temperature detecting means, the smaller the amount of the detergent to be introduced. The drum type washing machine according to claim 5, wherein 7. Permeability detecting means for detecting the permeability of water in the water receiving tank, wherein the control means controls so that the lower the permeability detected by the permeability detecting means, the larger the amount of the detergent charged. 7. The drum-type washing machine according to claim 5, wherein the adjustment is made in the following manner. 8. A water receiving tank, comprising: a water level detecting means for detecting a water level in the water receiving tank; and a control means for rotating a drum after water is supplied into the water receiving tank, and detecting the water level by the water level detecting means. If the water level in the area is low, add additional water supply,
The drum type washing machine according to any one of claims 5 to 7, wherein a detergent amount corresponding to the additional water supply amount is supplied by the detergent dispenser.