JP2013056019A - Drum type washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drum type washing machine that optimally washes laundry depending on an amount of detergent and can conduct a washing operation while highly saving energy.SOLUTION: A washing step of the drum type washing machine comprises: a step (S12) of rotating a drum 1 at such a low speed that laundry does not stick to a wall surface in the drum 1; and a centrifugally washing step (S14) of rotating the drum 1 at such a high speed that the laundry is in condition to stick to the drum 1 in a wall surface direction. A control part 70 reduces the number of rotation of the drum in the step of rotating the drum at a high speed when a detergent amount determination part 32 determines that the amount of the detergent is large.

Description

  The present invention relates to a drum-type washing machine that includes a drum (washing tub) that can be rotated by accommodating laundry in a receiving tube that is elastically supported, and performs washing, rinsing, and dehydration of the laundry in the drum. .

  Conventionally, in a drum type washing machine, after the laundry is put into the drum, tap water is supplied from the outside of the washing machine by the water supply means, and the drum is received through the detergent container in which the detergent has been put in advance. Water is poured into a cylinder or drum. After the water injection, the drum is rotated at a low speed while the laundry is sufficiently wetted with a cleaning solution containing a detergent, and then the drum is rotated at a low speed so that the laundry does not stick to the drum wall surface for a certain period of time. Accordingly, the washing is performed by removing the dirt by the impact when the wet laundry falls from the upper part of the drum as it rotates. In such a drum type washing machine, it is difficult to evenly wet the laundry put in the drum in the step of wetting the laundry, particularly when the amount of the laundry is large. For this reason, there was a problem that unevenness in washing occurred and the washing performance was remarkably lowered.

  Therefore, after supplying water, the drum is rotated at a predetermined speed that is relatively low, and the washing is washed, and the rotational speed that is higher than the angular speed at which the washing liquid in the laundry can be discharged out of the drum-shaped rotary tank by centrifugal force. Then, it is considered to rotate the drum at a higher rotational speed than a predetermined rotational speed. With such a configuration, the laundry is stirred so that the laundry is mixed more and more (see, for example, Patent Document 1).

JP-A-8-299658

  However, in the above washing machine, a constant high-speed rotation operation is performed regardless of the amount of detergent put in, so it is necessary when there is a large amount of detergent and a detergent with a high detergent concentration tends to act on dirt on clothes. As a result, unnecessary high-speed rotation is performed. This resulted in a problem of lacking energy saving.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object of the present invention is to provide a drum type washing machine that can perform optimum washing according to the amount of detergent and can perform washing operation with high energy saving.

  In order to solve the above-described conventional problems, a drum-type washing machine according to the present invention includes a drum that accommodates and rotates laundry, a receiving cylinder that accommodates the drum, a drum driving unit that drives the drum, and a detergent. And a controller for sequentially controlling each of the washing process, the rinsing process, and the dehydrating process based on the determination result of the detergent quantity determining unit. A stirring step of rotating the drum at a low speed such that the laundry does not stick in the drum; and the laundry is rotated at a high speed at which the laundry is stuck to the wall surface of the drum. A centrifugal force washing step of discharging washing water from the object by centrifugal force, and the control unit increases the number of rotations of the drum in the centrifugal force washing step as the amount of the detergent determined by the detergent amount determination unit increases. I tried to lower It is.

  With such a configuration, when the amount of the detergent is large, the rotational speed of the high-speed rotation in the centrifugal force washing process is lowered, the power consumption of the drum drive motor is suppressed, and the energy saving performance is ensured. On the other hand, when the amount of detergent is small, the number of high-speed rotations is increased, and the cleaning liquid is efficiently applied to the dirt on the clothes to increase the cleaning power.

  The drum type washing machine of the present invention can realize a drum type washing machine that performs optimum washing according to the amount of detergent and can perform washing operation with high energy saving.

Side surface sectional drawing which shows schematic structure of the drum type washing machine which concerns on Embodiment 1 of this invention. Control block diagram of the drum type washing machine The flowchart which shows operation | movement of the control part at the time of washing operation in the drum type washing machine Side surface sectional drawing which shows schematic structure of the drum type washing machine which concerns on Embodiment 4 of this invention.

  A drum-type washing machine according to a first aspect of the present invention is a drum-type washing machine that accommodates and rotates laundry, a receiving cylinder that accommodates the drum, a drum drive that drives the drum, and a detergent amount determination that determines the amount of detergent. And a control unit that sequentially controls each of the washing process, the rinsing process, and the dehydrating process based on the determination result of the detergent amount determination unit, and the washing process includes the laundry in the drum. A stirring step of rotating the drum at a low speed that does not stick, and washing water from the laundry by centrifugal force by rotating the drum at a high speed at which the laundry is stuck to the wall surface of the drum. A centrifugal force washing step for discharging, and the control unit is configured to lower the number of rotations of the drum in the centrifugal force washing step as the amount of the detergent determined by the detergent amount determination unit is larger. is there.

  With such a configuration, when the amount of detergent is large, the rotational speed of the high-speed rotation is lowered, and the power consumption of the drum drive motor is suppressed, so that the energy saving performance can be enhanced. In addition, since the amount of detergent is large, the rotational speed of the drum at a high speed is lowered in a state where the detergent concentration is high, so that occurrence of abnormal foaming can be reduced. On the other hand, when the amount of detergent is small, the rotational speed of the high-speed rotation can be increased, and the cleaning liquid can be efficiently applied to the dirt on the clothes to increase the cleaning power.

  According to a second aspect of the invention, in particular, the drum-type washing machine according to the first aspect of the invention further includes a water-containing means for allowing the laundry to contain the washing water, and the water-containing means is added to the laundry in the centrifugal washing step. The washing water is water-containing.

  With such a configuration, it is possible to positively act on the dirt adhering to the laundry with the cleaning water containing the detergent component, thereby increasing the cleaning power.

  According to a third aspect of the invention, in particular, the water-containing means of the drum-type washing machine according to the second aspect of the invention is to contain water by immersing a part of the laundry in the washing water collected at the inner bottom of the receiving cylinder. It is characterized by.

  With such a configuration, the washing water in which the dirt accumulated in the inner fixed portion of the receiving cylinder has not yet adhered is effectively absorbed by the laundry, and further, the washing water containing the dirt component is removed from the laundry by the centrifugal force. It can be dehydrated to facilitate replacement of the wash water contained in the clothing fibers.

According to a fourth aspect of the invention, in particular, the water-containing means of the drum-type washing machine according to the second or third aspect of the invention sucks the washing water collected at the inner bottom portion of the receiving cylinder into the laundry in the drum. It is a circulation shower which discharges again.

  With this configuration, since the cleaning water can be circulated only by the control of the circulation pump, the cleaning water can be circulated irrespective of the cleaning control that normally controls the cleaning power, such as a water flow by drum rotation. Washing water that has not yet adhered dirt is effectively absorbed by the laundry, and the washing water containing the dirt component is dehydrated from the laundry by centrifugal force, and the washing water contained in the clothing fiber is replaced. Can be promoted.

  In the fifth aspect of the invention, in particular, the determination of the amount of the detergent by the detergent amount determination unit of any one of the first to fourth drum-type washing machines is at least one of turbidity, conductivity, and chromaticity. This is performed using a sensor.

  With such a configuration, the detergent amount determination unit can accurately determine the amount of detergent according to the type of detergent and the detergent component, and can cope with cleaning according to the amount of detergent.

  In a sixth aspect of the present invention, in particular, any one of the first to fourth drum-type washing machines further includes a cloth amount detection unit that detects the amount of the stored laundry, and the detergent amount determination unit includes the cloth amount The amount of the detergent is determined according to the amount of the laundry detected by the amount detection unit.

  With such a configuration, it is not necessary to newly provide a detergent amount detecting means, and the detergent amount can be determined at a low cost.

  In the seventh invention, in particular, in any one of the first to fourth drum-type washing machines, a detergent charging unit for loading the detergent, and a detergent loading unit for detecting the weight of the detergent in the detergent loading unit A weight detection unit, wherein the detergent amount determination unit determines the detergent amount according to the weight of the detergent detected by the detergent charging unit weight detection unit.

  With such a configuration, the amount of detergent put in by the user can be directly detected by weight, and the amount of detergent can be determined with high accuracy.

  In an eighth aspect of the invention, in particular, any one of the first to fourth drum-type washing machines further includes an input setting unit, and the detergent amount determination unit sets the detergent amount set via the input setting unit. Accordingly, the amount of the detergent is determined.

  With such a configuration, it is not necessary to newly provide a detergent amount detection means, and it does not require a determination time, so that a simple configuration can be achieved.

  The ninth aspect of the present invention is a drum type washing and drying machine including, in particular, any one of the first to eighth drum type washing machines and a drying means for drying the washed clothes.

  Thus, by applying any of the above drum type washing machines, it is possible to realize a drum type washing and drying machine with high cleaning power and energy saving according to the amount of detergent.

  Hereinafter, a drum type washing machine according to an embodiment of the present invention will be described with reference to the drawings. In addition, the following embodiment is an example which actualized this invention, Comprising: The thing of the character which limits the technical scope of this invention is not.

(Embodiment 1)
FIG. 1 is a side sectional view showing a schematic configuration of a drum type washing machine according to Embodiment 1 of the present invention. FIG. 2 is a control block diagram of the drum type washing machine according to Embodiment 1 of the present invention.

  In FIG. 1, the receiving cylinder 2 is a cylindrical water tank that is elastically supported in the housing 100 and stores cleaning water containing a detergent component. A cylindrical drum 1 having a front opening and a bottom surface is rotatably included in a receiving cylinder 2 and accommodates laundry. A drum drive motor 3 (drum drive unit) is attached to the back surface of the receiving cylinder 2 to rotate the drum 1 while tilting the rotating shaft forward.

  The water supply port 4 is connected to the water supply, and the receiving tube 2 and the drum 1 are sequentially filled with water through the water supply valve 5.

  Between the water supply valve 5 and the receiving cylinder 2, a detergent case 18 (detergent throwing part) for throwing detergent in advance is provided. The supplied water and the supplied detergent are mixed and poured into the drum 1 through the water supply pipe 19.

  Although not shown in the lowest part of the receiving tube 2, a heater (heating unit) for heating the cleaning water stored in the receiving tube 2 is provided, and the temperature of the cleaning water is adjusted even when the tap water is cold. The cleaning ability of the detergent can be increased.

  A water intake 6 is connected to the lowest part of the receiving tube 2, and the wash water after washing and the rinse water after rinsing are drained out of the machine through the drainage valve 7.

  The water intake 6 is provided with a water level sensor 9 (water level detection unit) for detecting the water level supplied to the receiving cylinder 2 and the drum 1.

  Further, a circulation water channel 11 connected to the discharge port 10 for discharging the washing water and the rinsing water taken in from the water intake port 6 to the drum 1 is communicated between the water intake port 6 and the drain valve 7. The washing water and the rinsing water of the receiving cylinder 2 can be circulated by being fed from the intake port 6 through the circulation channel 11 and into the drum 1 from the discharge port 10. If the water intake into the circulation channel 11 is performed by using the circulation pump 12 as the water-containing means, the washing water can be circulated by the circulation channel 11 only by the control of the circulation pump 12. It is possible to circulate regardless of the cleaning control that normally controls the cleaning power, such as a water flow.

  If the circulating water (washing water or rinsing water) at the time of circulation contains a large amount of foreign matters such as laundry fibers and hair, the circulation pump 12 may be clogged. Therefore, a drainage filter 13 is installed upstream of the circulation pump 12. ing. The drainage filter 13 removes foreign matters such as laundry fibers and hair.

In the present embodiment, a turbidity sensor 14 capable of detecting the permeability of water passing through the circulating water channel 11 is provided in the circulating water channel 11 in order to detect the amount of detergent. The turbidity sensor 14 is composed of an LED that is a light emitting element and a phototransistor that is a light receiving element, and is placed opposite to the left and right substantially horizontal positions across the circulation water channel 11. When the introduced detergent is mixed with water and melted, the transmittance (turbidity) of the washing water varies depending on the amount of the detergent. Therefore, the amount of the detergent is detected according to the output result of the turbidity sensor 14. The The turbidity sensor 14 includes a light emitting element that emits infrared light and a light receiving element that receives infrared light emitted from the light emitting element. The light emitting element and the light receiving element are located outside the circulation water channel 11 and face each other. Therefore, since the optical axis of the infrared ray is formed between the light emitting element and the light receiving element, the circulating water channel 11 to which the turbidity sensor 14 is attached is at least partially made of a material that transmits the infrared ray. Including. Infrared rays from the light emitting element pass through the wash water in the circulating water channel 11 corresponding to the position where the turbidity sensor 14 is attached. When the amount of cleaning water detergent is large and turbidity is large, the amount of infrared light reaching the light receiving element is small. When the amount of cleaning water detergent is small and turbidity is small, the amount of infrared light reaching the light receiving element. Becomes bigger. Therefore, the turbidity sensor 14 outputs an output corresponding to the turbidity of the washing water, and the detergent amount determination unit 32 can determine the detergent amount.

  The casing 100 is provided with a door body 15 facing the opening end side of the drum 1, and the user opens and closes the laundry body (clothing) with respect to the drum 1 by opening the door body 15. be able to.

  A plurality of protrusions 16 are provided on the inner peripheral wall of the drum 1. By rotating the drum 1 at a low speed, the garment is caught by the protrusions 16 and lifted upward. Thereafter, the garment falls from an appropriate height. Thus, the stirring operation (tumbling operation) can be performed by the protrusion 16.

  A plurality of through holes 17 are provided on the inner peripheral wall of the drum 1 so that water can freely pass between the drum 1 and the receiving cylinder 2.

  As shown in FIG. 2, the drum type washing machine has a control unit 70. The control unit 70 displays setting information input from the user via the input setting unit 30 on the display unit 31, and performs washing, rinsing, and dehydration based on the setting information and the monitoring status of the operation state of each unit. Control a series of driving actions.

  The control unit 70 includes, for example, a CPU (Central Processing Unit) (not shown), a ROM (Read Only Memory) that stores programs, a RAM (Random Access Memory) that stores programs and data when various processes are executed, an input / output interface, and these Can be configured by a bus connecting the two. Further, the control unit 70 includes a detergent amount determination unit 32 and a timer 71. The detergent amount determination unit 32 determines the amount of detergent that has been input. As the timer 71, an internal timer incorporated as an internal function in operation of the control unit 70 is used. Note that a timer device independent of the control unit 70 may be used as the timer 71.

  In the drum type washing machine according to the present embodiment, AC power 20 is rectified by a rectifier 24 and then smoothed by a smoothing circuit including a choke coil 25 and a smoothing capacitor 26. Then, the drum drive motor 3 is rotationally driven by the inverter circuit 22 using the smoothed DC power as drive power. The control unit 70 controls the rotation of the drum drive motor 3 based on the driving instruction input from the input setting unit 30 and the monitoring information of the driving state detected by each detecting unit. Further, the control unit 70 controls operations of necessary loads such as the water supply valve 5, the drain valve 7, and the circulation pump 12 through the load driving unit 23.

The drum drive motor 3 includes, for example, a stator having three-phase windings 3a, 3b, and 3c and a rotor having a two-pole permanent magnet, and is configured as a DC brushless motor provided with three position detection elements 27a to 27c. can do. The drum drive motor 3 can be rotationally controlled by an inverter circuit 22 configured to be capable of PWM control by the switching elements 22a to 22f. Here, the rotor position detection signals detected by the position detection elements 27 a to 27 c are input to the control unit 70. Then, the control unit 70 outputs a control signal to the inverter drive circuit 21 based on the rotor position detection signal, and performs PWM control of the on / off states of the switching elements 22a to 22f via the inverter drive circuit 21. In this way, the control unit 70 controls energization of the stator three-phase windings 3a, 3b, and 3c, and rotates the rotor of the drum drive motor 3 at a desired rotational speed. The control unit 70 detects the cycle each time the signal state of any of the three position detection elements 27a, 27b, and 27c changes, and the rotational speed detection unit 72 uses the rotational speed of the rotor as an internal function based on the cycle. Calculated by
Further, the cloth amount detection unit 73 detects a current signal flowing through the drum drive motor 3 to determine the weight of the drum 1, that is, the weight of the laundry.

  Hereinafter, the operation and effect of the drum type washing machine configured as described above will be described in detail with reference to FIG.

  When the laundry is put into the washing machine and the laundry is started, the cloth amount detection unit 73 of the control unit 70 detects the amount of the laundry (S1). The amount of laundry is detected by controlling the drum drive motor 3 to detect the magnitude, acceleration, acceleration time, etc. of the current signal of the drum drive motor 3 when the drum 1 is rotated together with the laundry. .

  The basic water supply is determined based on the amount of laundry. For example, when the cloth amount detection unit 73 determines that the amount of laundry is “low”, the control unit 70 sets WL1 of the “low” water level as the set water level. When the cloth amount detection unit 73 determines that the amount of laundry is “medium”, the control unit 70 sets WL2 of the “medium” water level as the set water level. When the cloth amount detection unit 73 determines that the amount of laundry is “large”, the control unit 70 sets WL3 of the “high” water level as the set water level (S2).

  Next, the control unit 70 opens the water supply valve 5 (S3), and supplies water to the receiving cylinder 2 and the drum 1 until the set water level is reached (S4).

  Next, when the set water level is reached (YES in S4), the water supply valve 5 is closed (S5), and the detergent amount determination unit 32 determines the detergent amount (S6).

  If the circulation pump 12 or the drum 1 is driven, the clothes absorb the washing water before the detergent dissolves in the water. Therefore, it is desirable to determine the amount of the detergent before driving them. Alternatively, the detergent amount may be determined by driving the circulation pump 12 at such a rotational speed that the washing water is not discharged to the clothes in order to make the detergent have a uniform concentration.

  If the determination result of the detergent amount determination unit 32 is a detergent amount equal to or less than the predetermined value A (YES in S7), the parameter R (number of rotations at the time of high-speed drum rotation) is set to 300 rpm (S8). If the determination result is greater than the predetermined value A and not more than 1.2 times the detergent amount (YES in S9), the parameter R is set to 200 rpm (S10). Otherwise (NO in S9), that is, if the determination result is a detergent amount greater than 1.2 times the predetermined value A, the parameter R is set to 150 rpm (S17). That is, the smaller the detergent amount determined by the detergent amount determination unit 32, the larger the value of the parameter R. By doing in this way, when there is much detergent amount, the rotational speed of high speed rotation is made low, and energy saving performance can be made high by suppressing the power consumption of a drum drive motor. In addition, since the amount of detergent is large, the rotational speed of the drum at a high speed is lowered in a state where the detergent concentration is high, so that occurrence of abnormal foaming can be reduced. On the other hand, when the amount of detergent is small, the rotational speed of the high-speed rotation can be increased, and the cleaning liquid can be efficiently applied to the dirt on the clothes to increase the cleaning power.

  Next, an agitation process is started in which the drum 1 is rotated at a low speed at which the laundry does not stick in the drum 1 (S12). The rotation speed of the drum 1 is such that the laundry is lifted in the drum 1 and falls from the upper part of the drum 1 due to gravity, and the kinetic energy at the time of dropping is effectively applied to the wall surface of the drum 1 by centrifugal force. The rotation speed of The rotation speed at this time is preferably 50 rpm or less although it depends on the amount of laundry. The rotation direction may be the same direction or periodically switched.

At this time, the circulation pump 12 is controlled by the control unit 70, and the washing water in which the detergent is sufficiently dissolved is supplied to the washing water by a circulation shower in which the washing water circulates from the discharge port 10 into the drum 1 through the circulation water channel 11. Penetration is promoted. For this reason, the rotation speed of the circulation pump 12 is set to a rotation speed at which the circulating water is firmly discharged into the drum 1 and the washing water can easily penetrate into the laundry. In addition, the laundry in the drum 1 is immersed in the washing water that accumulates in the fixed portion of the receiving cylinder 2. As the drum 1 rotates, the entire laundry is repeatedly immersed, and the water content and dewatering of the washing water are repeated, and the penetration of the washing water into the laundry is promoted.

  After a certain time (for example, 2 minutes) has elapsed (YES in S13), a centrifugal washing process is performed (S14). The rotation speed at this time is rotated at a high speed with the rotation speed of the parameter R set above.

  Due to the centrifugal force generated by rotating the drum 1 at a high speed, the laundry is stuck to the wall surface of the drum, and the moisture contained in the laundry is squeezed out, and then the through holes 17 of the drum 1 are passed through. It passes and moves to the receiving cylinder 2 side.

  The speed at which the drum 1 is rotated at a high speed is preferably at least 150 rpm, more preferably at least 300 rpm, at which the moisture contained in the laundry can be forcibly separated by centrifugal force.

  However, as described above, the rotational speed is varied according to the detergent amount determined by the detergent amount determination unit 32. That is, when the amount of detergent is large (the detergent concentration of washing water is high), it is not rotated at a high speed up to 300 rpm, but is kept at 150 rpm, which is the minimum necessary for removing the moisture contained in the laundry, and energy saving operation with low motor power consumption I do. On the other hand, when the amount of detergent is small (the detergent concentration of the washing water is low), it is rotated at a high speed up to 300 rpm to effectively promote the replacement of the washing liquid contained in the laundry. In addition, the unit operation for performing the high-speed rotation may be a continuous one-time operation, which may be repeatedly performed intermittently such as ON / OFF in a short time.

  In the centrifugal force washing process in which the drum 1 is rotated at a high speed, the washing water in the vicinity of the clothing fibers containing detergents, which are attached to the soiled substances of the clothing fibers and contain a detergent, is centrifuged at the time of the previous stirring process. Remove by force. This makes it possible to efficiently remove dirt substances from the fibers together with the washing water. Furthermore, if the washing water is discharged toward the laundry in the drum 1 by the circulation pump 12 during high-speed rotation, the washing water that has not yet adhered dirt is effectively absorbed into the laundry, The replacement of the washing water contained in the clothing fiber can be promoted.

  The time required for the centrifugal washing process is relatively short as long as the washing water contained in the laundry can be squeezed out, for example, 30 seconds (YES in S15).

  Subsequently, a stirring step of rotating the drum 1 at a low speed is performed again (S16). In this step, the circulation pump 12 is started in the same manner as in the step S12 and discharged from the discharge port 10 into the drum 1 via the circulation water channel 11. At this time, the drum 1 rotates at a rotation speed such that the laundry does not stick and rolls in the drum 1, and the timing at which the circulation pump 12 is operated and the washing water is discharged from the discharge port 10 is intermittent even if it is continuous. It doesn't matter.

  After the step of rotating the drum 1 at a high speed, the agitation step is further continued, so that the dirt substance remaining on the fiber is further peeled off again by the chemical force of the detergent and the mechanical force accompanying the rotation of the drum 1. Is possible. If the concentration of dirt substances in the wash water between the fibers is high, there is a concern of reattachment to the fibers, but the dirt that is surrounded by the detergent surfactant is difficult to reattach and adheres to the dirt. Since only the non-surfactant sticks to the laundry, the chemical power of the detergent can work on the remaining dirt.

Thereafter, when the timer 71 confirms that five minutes have elapsed since the start of the stirring process after the centrifugal force washing process (YES in S17), the rotation of the drum 1 is stopped and the washing process ends.

  The time of the stirring process after the centrifugal washing process is fixed at a specific time regardless of the amount of cloth because it is sufficient to allow the remaining detergent to sufficiently penetrate the laundry. Since the one-minute calculation and the constant table are small, the load on the control unit 70 can be reduced. In this embodiment, it is 5 minutes after the start of the stirring process after the centrifugal cleaning process, but the time of the cleaning process is defined, and after the specified time has elapsed from the start of the cleaning process, It is good also as ending this stirring process. By doing so, the washing process is not unnecessarily prolonged.

  As described above, as the detergent amount determined by the detergent amount determination unit 32 is larger, the number of rotations of the drum in the centrifugal force washing step is decreased, so that washing water having a high detergent concentration is replaced with washing water contained in the laundry. Cleaning can be performed with only the minimum power consumption of the drum drive motor. For this reason, a driving | operation with high energy saving property is realizable. On the other hand, the smaller the amount of detergent determined by the detergent amount determination unit 32, the higher the number of revolutions of the drum in the centrifugal force washing step, thereby effectively promoting the replacement of the washing water contained in the laundry, Detergency can be increased.

  In the present embodiment, the detergent amount detection unit is configured from the turbidity sensor 14, but the present invention is not limited to this. For example, it is good also as what is comprised from the electrical conductivity sensor which detects the electrical conductivity of water. That is, since the electrical conductivity of water changes according to the components dissolved when the detergent is mixed with water and dissolved, the amount of the detergent can be determined according to the rate of change. Further, the detergent amount determination unit 32 may be configured by a chromaticity sensor that detects the chromaticity of water. That is, since the chromaticity of water changes according to the component dissolved when the detergent is mixed with water, the amount of the detergent can be determined according to the rate of change.

  In addition, in this Embodiment, although the washing process which implements a centrifugal-force washing process (S14) only once was illustrated, it is not limited to this. For example, when the amount of laundry is large, the centrifugal force washing step (S14) and the stirring step (S15) are alternately repeated a plurality of times, thereby increasing the frequency of the drum high-speed rotation step and discharging dirt more strongly. It can also be a cleaning process that can be performed.

  In each of the above embodiments, a drum type washing machine having only a washing function has been described. However, the present invention is not limited to this, and includes a drying means for drying washed clothes. The present invention can also be applied to a drum-type washing / drying machine having a drum drying function.

(Embodiment 2)
The drum type washing machine according to the present embodiment includes a cloth amount detection unit 73 that detects the amount of stored laundry, and the detergent amount determination unit 32 responds to the amount of laundry detected by the cloth amount detection unit 73. The amount of detergent is determined. That is, the detergent amount determination unit 32 indirectly determines the amount of detergent necessary for washing. Other configurations are the same as those of the first embodiment of the present invention.

  The detergent amount determination unit 32 determines the amount of detergent according to the amount of laundry detected by the cloth amount detection unit 73 that detects the amount of laundry that has been input. In other words, the recommended amount of detergent according to the amount of laundry is determined by the type and brand of the detergent, and if the amount of laundry is detected, the guideline of the amount of detergent to be introduced by the user can be known. The amount of detergent is determined according to In this way, by indirectly determining the detergent amount from the output of the cloth amount detection unit 73, it is not necessary to newly provide a detergent amount detection means, and the determination of the detergent amount can be realized at low cost.

(Embodiment 3)
The drum-type washing machine according to the present embodiment includes a cloth amount detection unit 73 that detects the amount of stored laundry and an automatic detergent loading device, and the detergent amount determination unit 32 is detected by the cloth amount detection unit 73. The amount of detergent is determined according to the amount of laundry, and the control unit 70 supplies the detergent according to the determined amount of detergent to the receiving tube by the detergent automatic charging device. That is, the detergent amount determination unit 32 determines the amount of detergent to be automatically added. Other configurations are the same as those of the first embodiment of the present invention.

  The detergent amount determination unit 32 determines the amount of detergent according to the amount of laundry detected by the cloth amount detection unit 73 that detects the amount of laundry put in. That is, the detergent amount determination unit 32 can reliably determine the amount of detergent that has been introduced without detecting the amount of detergent to be introduced or estimating the amount of detergent. The amount of detergent is determined according to the detection result of the cloth amount detection unit, and the control unit 70 determines the number of rotations of the drum in the centrifugal force washing process with this amount of detergent. In this way, by providing the detergent automatic charging device, the amount of detergent can be determined with high accuracy. Therefore, centrifugal cleaning can be performed according to the amount of detergent actually put in, and energy saving performance can be improved and cleaning power can be ensured.

(Embodiment 4)
The drum-type washing machine according to the present embodiment further includes a detergent loading unit weight detection unit 33 that detects the weight of the detergent in the detergent case 18 (detergent loading unit), and the detergent amount determination unit 32 detects the detergent loading unit weight. The amount of detergent is determined according to the weight of the detergent detected by the section 33. Other configurations are the same as those of the first embodiment of the present invention.

FIG. 4 is a side sectional view showing a schematic configuration of the drum type washing machine according to Embodiment 4 of the present invention. A detergent charging unit weight detector 33 that detects the weight of the detergent in the detergent case 18 is provided.
When the detergent is put into the detergent case 18, the detergent throwing part weight detecting unit 33 that detects the weight of the detergent case 18 detects the weight of the detergent. The detergent amount determination unit 32 determines the detergent amount based on the detected weight of the detergent. In this way, since the detergent amount is determined by directly detecting the weight of the detergent charging portion that changes according to the weight of the detergent that has been thrown, the detergent thrown by the user can be directly detected by weight, The amount of detergent can be determined with high accuracy. Therefore, centrifugal cleaning can be performed according to the amount of detergent actually put in, and energy saving performance can be improved and cleaning power can be ensured.

(Embodiment 5)
The drum type washing machine according to the present embodiment includes an input setting unit 30, and the detergent amount determination unit 32 determines the amount of detergent according to the detergent amount set via the input setting unit 30. Is. That is, the detergent amount determination unit 32 determines the amount of detergent from the amount of detergent that reflects the user's intention. Other configurations are the same as those of the first embodiment of the present invention.

  The user sets the detergent amount via the input setting unit 30. The control unit 70 determines the rotational speed of centrifugal cleaning in accordance with the set detergent amount. That is, the user determines the amount of detergent by determining the amount of detergent himself from the amount of laundry to be input and the degree of dirt on the laundry, and determines the amount of detergent input via the input setting unit 30. The determination part 32 determines. With such a configuration, it is not necessary to newly provide a detergent amount detection means, and it does not require a determination time, so that a simple configuration can be achieved.

  The washing machine and the washing / drying machine according to the present invention are not limited to a home-use drum-type washing machine or a washing / drying machine, but also a home-use vertical washing machine, a vertical washing / drying machine, or a commercial drum-type washing machine or It can be used widely and suitably for drum-type washing and drying machines.

1 Drum 2 Cylinder 3 Drum Drive Motor (Drum Drive Unit)
4 Water supply port 5 Water supply valve 6 Water intake port 7 Drain valve 8 Drain pipe 9 Water level sensor 10 Discharge port 11 Circulating water channel 12 Circulation pump (moisture containing means)
13 Drain filter 14 Turbidity sensor 15 Door 16 Protrusion 17 Through hole 18 Detergent case (detergent input part)
19 Water supply pipe 32 Detergent amount determination unit 33 Detergent input unit weight detection unit 70 Control unit 73 Cloth amount detection unit 100 Case

Claims (9)

A drum that houses and rotates laundry;
A receiving cylinder for housing the drum;
A drum driving unit for driving the drum;
It has a detergent amount determination unit for determining the amount of detergent, and based on the determination result of the detergent amount determination unit, includes a control unit that sequentially controls at least the washing process,
The washing step
A stirring step of rotating the drum at a low speed such that the laundry does not stick in the drum;
A centrifugal force washing step of rotating the drum at a high speed at which the laundry is stuck to the wall surface of the drum and discharging washing water by centrifugal force from the laundry,
The said control part is a drum type washing machine which made the rotation speed of the said drum in the said centrifugal force washing | cleaning process low, so that there are many amounts of the said detergent determined by the said detergent amount determination part. Further comprising water-containing means for containing the washing water in the laundry,
The drum-type washing machine according to claim 1, wherein the water-containing means causes the laundry to contain the washing water in the centrifugal washing step. The drum-type washing machine according to claim 2, wherein the water-containing means contains water by immersing a part of the laundry in the washing water accumulated in an inner bottom portion of the receiving cylinder. The drum according to claim 2 or 3, wherein the water-containing means is a circulating shower that sucks the washing water accumulated in the inner bottom portion of the receiving cylinder and discharges the washing water again to the laundry in the drum. Type washing machine. The drum according to any one of claims 1 to 4, wherein determination of the amount of the detergent by the detergent amount determination unit is performed using at least one sensor of turbidity, conductivity, and chromaticity. Type washing machine. A cloth amount detection unit for detecting the amount of the laundry stored;
The drum type according to any one of claims 1 to 4, wherein the detergent amount determination unit determines the amount of the detergent according to the amount of the laundry detected by the cloth amount detection unit. Washing machine. A detergent charging part for charging the detergent;
A detergent insertion part weight detection unit for detecting the weight of the detergent in the detergent insertion part,
The drum type washing machine according to any one of claims 1 to 4, wherein the detergent amount determination unit determines the amount of the detergent according to the weight of the detergent detected by the detergent charging unit weight detection unit. . An input setting unit,
The drum type washing machine according to any one of claims 1 to 4, wherein the detergent amount determination unit determines the amount of the detergent according to a detergent amount set via the input setting unit. A drum type washing and drying machine comprising: the drum type washing machine according to any one of claims 1 to 8; and a drying means for drying the washed clothes.