JP2013135787A - Washing machine and washing and drying machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drum type washing machine performing an optimum washing operation to have low power consumption by high washing force according to a water temperature of washing water to be used for washing.SOLUTION: The drum type washing machine includes: a drum 1 rotating while storing laundry; a receiving cylinder 2 for storing the drum 1; a drum driving section 3 for driving the drum 1; a water temperature detection section 14 for detecting the water temperature of the washing water to be used for washing; and a control section 70 for inputting an output of the water temperature detection section 14 and controlling a washing process. The washing process includes an agitation process (S13) for rotating the drum 1 at a low speed at which laundry is not stuck in the drum 1 and a centrifugal force washing process (S16) for rotating the drum 1 at a high speed at which laundry is stuck in a wall surface direction of the drum 1. The control section 70 increases the number of rotation of the drum 1 in the centrifugal force washing process (S16) when the water temperature detected by the water temperature detection section 14 is lower than a prescribed temperature.

Description

  The present invention relates to a washing machine that includes a drum (washing tub) that is rotatable and accommodates laundry in an elastically supported outer tub, and performs washing, rinsing, and dehydration of the laundry in the drum.

  In the conventional 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 accommodated in the receiving cylinder or drum through the detergent container in which the detergent has been put in advance. Water is poured. After the water injection, the laundry is sufficiently wetted with washing water while rotating the drum at a low speed, 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. In particular, in a drum-type washing machine in which a rotating shaft for rotating a drum is horizontal or inclined, washing is performed by removing dirt by impact when wet laundry falls from the top of the drum as it rotates. In such a drum-type washing machine, particularly when the amount of laundry is large, it is difficult to uniformly wet the clothes put in the drum in the process of wetting the laundry, and uneven washing occurs. There has been a problem that the cleaning performance is significantly reduced.

  Therefore, after water supply, the drum is washed by rotating it at a relatively low speed, and the rotation speed is higher than the angular speed at which the washing water in the laundry can be discharged out of the drum-shaped rotary tub by centrifugal force. It is considered that the laundry is stirred by rotating the drum-shaped rotating tub at a rotational speed greater than a predetermined rotational speed to perform washing and washing (for example, patents). Reference 1).

JP-A-8-299658

  In general, laundry fibers expand as the temperature increases, and the gaps between the fibers widen, so that the washing water easily passes through, and the dirt attached to the fibers (particularly the inside) is easily peeled off. However, in the above-described washing machine, a constant high-speed rotation operation is performed regardless of the temperature of the washing water used for the washing that has been thrown in. Therefore, when the washing water temperature is low and the gap between the fibers is narrow, Insufficient permeation and passage of clothes into clothing, there was a problem that cleaning performance could not be exhibited. On the other hand, when the temperature of the washing water used for washing is high and the fibers are inflated, an unnecessarily high-speed rotation operation is performed, and there is a problem of lack of energy saving. Further, there is a problem that abnormal foaming is caused by rotating a drum immersed in washing water in a state where the water temperature is high and the detergent and soap components are easily dissolved.

  An object of the present invention is to provide a drum type washing machine that performs an optimum washing operation with high detergency and low power consumption according to the temperature of washing water used for washing.

  In order to solve the above-described problems, a washing machine of 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 washing water used for washing. A water temperature detection unit for determining a water temperature, and a control unit that inputs an output of the water temperature detection unit and controls the washing process, and the washing process is performed at a low speed so that the laundry does not stick to the drum. The control unit includes a stirring process in which the drum rotates and a centrifugal force cleaning process in which the drum rotates at a high speed at which the laundry is stuck to the wall surface of the drum. When the detected water temperature is lower than a predetermined temperature, the rotational speed of the drum in the centrifugal force washing step is increased.

  As a result, when the temperature of the washing water used for washing is low, the number of high-speed rotations in the centrifugal washing process is increased so that the washing water can easily pass between the fibers of the garment and the dirt is peeled off to remove the washing power. To increase. On the other hand, when the water temperature is high, it is not necessary to increase the number of high-speed rotations, so that the power consumption of the drum drive unit can be suppressed, and an operation with excellent energy savings can be performed.

  The washing machine of the present invention can perform an optimum washing operation excellent in washing performance and energy saving property according to the temperature of washing water used for washing.

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 showing schematic configuration of the drum type washing machine The flowchart which shows operation | movement of the control part at the time of a washing operation in the drum type washing machine. The flowchart which shows operation | movement of the control part at the time of a washing operation in the drum type washing machine.

  A washing machine according to a first aspect of the present invention is a water temperature for determining a temperature of washing water used for washing, a drum that accommodates and rotates laundry, a receiving cylinder that accommodates the drum, a drum driving unit that drives the drum, and a washing machine. A detection unit and a control unit that inputs the output of the water temperature detection unit and controls the washing process are provided, and the drum rotates at a low speed that does not allow the laundry to stick to the drum. A stirring step and a centrifugal washing step in which the drum rotates at a high speed at which the laundry is stuck to the wall surface of the drum, and the control unit has a predetermined water temperature detected by the water temperature detection unit. When the temperature is lower than the temperature, the rotational speed of the drum in the centrifugal force washing step is increased.

  Thereby, when the temperature of the washing water used for washing is low, the rotation speed of the high-speed rotation can be increased to facilitate the penetration and passage of the washing water between the clothes. Thereby, it can act on dirt efficiently and can raise cleaning power. When the water temperature is high, there is no need to increase the number of high-speed rotations, so that the power consumption of the drum drive unit can be suppressed, and an operation with excellent energy savings can be performed.

  A washing machine according to a second aspect of 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 heating unit that heats washing water used for washing. An input setting unit for setting the temperature of the cleaning water used for washing, and a control unit for adjusting the washing water to the input water temperature by inputting the water temperature set by the input setting unit and controlling the washing process, The washing step includes an agitation step in which the drum rotates at a low speed that does not allow the laundry to stick to the drum, and a high speed at which the laundry is stuck to the wall surface of the drum. The control unit is configured to increase the number of rotations of the drum in the centrifugal force washing step as the water temperature set by the water temperature setting unit is lower.

  Thereby, when the temperature of the washing water used for washing is low, the rotation speed of the high-speed rotation is increased so that the washing water can easily permeate and pass between the clothes, and can effectively act on the dirt to enhance the washing power. On the other hand, when the water temperature is high, the rotational speed of the high-speed rotation is lowered to save energy by suppressing the power consumption of the drum drive motor. Furthermore, since the high-speed rotation speed can be determined simultaneously with the water temperature setting and the determination time is not required, a simple configuration can be achieved.

According to a third aspect of the present invention, the washing machine of the first or second aspect of the present invention further includes a water containing means for containing the washing water in the laundry.
The water-containing means is configured to cause the laundry to contain the washing water in the centrifugal washing step.

  Thereby, cleaning water can be made to act on the stain | pollution | contamination adhering to the laundry, and a cleaning power can be improved.

  According to a fourth aspect of the present invention, the water-containing means of the third aspect is a circulating shower that sucks the washing water collected at the bottom of the receiving cylinder and discharges it again to the laundry in the drum.

  As a result, the wash water can be circulated only by the control of the circulation pump. Therefore, the wash water that has not been adhered to the laundry is circulated regardless of the wash control that controls the normal washing power such as the water flow caused by the drum rotation. Can be effectively absorbed to promote replacement of the washing water contained in the clothing fiber.

  In a fifth aspect of the present invention, the water-containing means of the third invention contains water by immersing a part of the laundry in the washing water collected at the bottom of the receiving tube.

  Thereby, the washing water which has not yet adhered the dirt can be effectively absorbed by the laundry, and the replacement of the washing water contained in the clothing fiber can be promoted.

  The sixth invention includes the washing machine according to any one of the first to fifth inventions, and a drying means for drying the washed clothes.

  In this way, by applying any of the above drum type washing machines, it is possible to realize a drum type washing and drying machine having high cleaning power and energy saving according to the temperature of the washing water used for washing.

  Hereinafter, a drum type washing machine according to an embodiment of the present invention will be described with reference to the accompanying 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 showing a schematic configuration of the drum type washing machine according to Embodiment 1 of the present invention.

  In FIG. 1, a cylindrical drum 1 that accommodates laundry and has a bottom surface with a front opening is supported in a housing 100 and contained in a receiving cylinder 2 as a cylindrical water tank that stores washing water. A drum drive motor 3 (drum drive unit) is attached to the back surface of the receiving cylinder 2 so that the rotation shaft of the drum 1 is inclined upward and supports the drum, and rotates around the rotation shaft.

  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.

  A detergent case 18 (detergent throwing part) for throwing detergent in advance is provided between the water supply valve 5 and the receiving cylinder 2, and the receiving cylinder is passed through the water supply pipe 19 while the supplied water and detergent are mixed. Water is poured into 2.

  The lowest part of the receiving tube 2 is provided with a heater 28 (heating unit) for heating the cleaning water stored in the receiving tube 2, so that the temperature of the cleaning water can be increased even when the tap water is at a low temperature. Detergent can be activated to increase detergency.

  The water temperature detector 14 is installed in the vicinity of the heater 28 and detects the temperature of the cleaning water stored in the receiving cylinder 2. As a result, it is possible to control the heater 28 so that an optimum washing program corresponding to the temperature of the supplied water can be executed and washing can be performed at an optimum water temperature for washing clothes. The water temperature detection unit 14 is a thermistor type sensor that detects the temperature using a phenomenon in which the electrical resistance changes according to a change in temperature.

  Further, a water intake 6 is connected to the lowest part of the receiving cylinder 2, and washing water after washing and rinsing liquid after rinsing can be drained out of the machine through a drain valve 7 through a drain valve 7. it can.

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

  Further, between the intake port 6 and the drain valve 7, a circulation water channel 11 connected to the discharge port 10 for discharging the wash water taken in from the intake port 6 to the drum 1 is communicated, so that the wash water of the receiving cylinder 2 can be easily rinsed out. The liquid can be circulated. If the water is taken into the circulation channel 11 using the circulation pump 12, the washing water can be circulated only by the control of the circulation pump 12. It can be circulated irrespective of the cleaning control that controls the normal cleaning power.

  If the circulating water at the time of circulation contains a lot of foreign matter such as laundry fibers or hair, the circulation pump 12 may be clogged. Therefore, a drainage filter 13 is installed at the end of the water intake 6 to put the laundry fibers. Try to remove foreign objects such as hair.

  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 clothes are hooked by the protrusions 16 and lifted upward, and then dropped at an appropriate height. Such a stirring operation (tumbling operation) can be given.

  A plurality of through holes 17 are provided in the inner peripheral wall of the drum 1 so that water and air 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 a series of washing, rinsing, and dehydration based on the setting information and the operation state monitoring of each unit. Controls the operation of

  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 has a timer 71. As the timer 71, an internal timer incorporated as an internal function in the operation of the control unit 70 can be used. As the timer 71, a timer device independent from the control unit 70 can be used.

  In the drum type washing machine, 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 whenever the signal state of any of the three position detection elements 27a to 27c changes, and calculates the rotation speed of the rotor from the cycle by the rotation number detection unit 72 as an internal function. To do.

  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 washing is started, 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 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 it is determined that the amount of laundry is “low”, the low water level WL1 is set as the set water level. When it is determined that the amount of laundry is “medium”, WL2 of the “medium” water level is set as the set water level. When it is determined that the amount of laundry is “large”, the WL3 at the “high” water level is set 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 water temperature detector 14 detects the water temperature of the wash water (S6).

  If the water temperature detected by the water temperature detector 14 is lower than 20 ° C. (YES in S7), the controller 70 sets the parameter R to 300 rpm (S8). If the water temperature is 20 to 30 ° C. (YES in S9), the parameter R is set to 200 rpm (S10). If the water temperature is 30 ° C. or higher (NO in S9), the parameter R is set to 150 rpm (S11). In other words, the lower the water temperature detected by the water temperature detection unit 14 is, the larger the parameter (number of rotations at the time of drum high-speed rotation) is.

  Next, stirring is started while rotating the drum 1 at a low speed (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 Although depending on the amount of laundry, 50 rpm or less is preferable. The rotation direction may be the same direction or periodically switched.

  At this time, the control unit 70 controls the circulation pump 12 to circulate the washing water in which the detergent is sufficiently dissolved from the discharge port 10 into the drum 1 through the circulation water channel 11, thereby supplying the washing water to the laundry. Promotes penetration. 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.

  After a certain time (for example, 2 minutes) has elapsed (YES in S13), a centrifugal force washing process is started for rotating the drum 1 at a high speed at the rotation speed of the set parameter R (S14).

  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 a speed at which the laundry is stuck to the wall surface of the drum 1, and it is sufficient that the water contained in the laundry is forcibly separated by centrifugal force. Possible 150 rpm or more is preferable, more preferably 300 rpm or more.

  However, in the present embodiment, the rotational speed is varied according to the water temperature of the washing water previously determined by the water temperature detector 14. That is, when the water temperature is high, the clothing expands and the gaps between the fibers widen, and the washing water easily penetrates and passes through the clothing, so there is no need to rotate it at a high speed up to 300 rpm and the moisture contained in the laundry is released. The energy saving operation with low motor power consumption is performed with the minimum required 150 rpm.

  On the other hand, when the water temperature is low, there is little expansion of the clothing and the gap between the fibers remains narrow, and the washing water is difficult to penetrate and pass through the clothing. Therefore, it is effective to increase the centrifugal force applied to the clothing by rotating it at a high speed to 300 rpm. The replacement of the cleaning liquid contained in the laundry is promoted.

  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 is rotated at a high speed, the washing water in the vicinity of the clothing fiber containing the detergent made of the surfactant attached to the soiling substance of the clothing fiber is contained in the low speed stirring process performed previously. Removal by centrifugal force 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 the centrifugal washing process in which the drum 1 is rotated at a high speed, the washing water that has not yet adhered dirt is effective for the laundry. It is possible to promote replacement of the washing water contained in the garment fiber by being absorbed. The promotion of the replacement of the washing water is not limited to the circulation shower performed by driving the circulation pump 12, but is also performed by immersing a part of the laundry in the washing water that accumulates below the bottom of the receiving cylinder 2. That is, the washing water is dehydrated from the laundry by the centrifugal force generated by the high-speed rotation of the drum 1, and on the other hand, the replacement of the washing water is promoted by containing the washing water that accumulates below the bottom of the receiving cylinder 2. Therefore, the water level at this time needs to be such that the laundry in the drum 1 rotating at high speed can come into contact with the washing water below the bottom of the drum 1.

  The time for rotating the drum 1 at a high speed may be a relatively short time as long as the washing water contained in the laundry can be squeezed out, for example, 30 seconds (YES in S15).

  Subsequently, the stirring process 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 centrifugal washing process of rotating the drum 1 at a high speed, the soiling substance remaining on the fiber again due to the chemical force of the detergent and the mechanical force accompanying the rotation of the drum 1 by continuing the process of stirring the drum at a low speed. Can be further removed. If there is a high concentration of soil substances in the wash water between the fibers, there is a concern of reattachment to the fibers, but the dirt that is surrounded by the detergent surfactant is difficult to reattach and is not attached to the dirt. Since only the surfactant sticks to the laundry, it can work against the remaining dirt.

  The time for the stirring step for rotating the drum 1 at a low speed may be 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. For example, in this embodiment, if the washing process is completed after 5 minutes (YES in S17), the number of calculations and constant tables can be reduced, so the load on the control unit 70 can be reduced.

  As described above, when the water temperature detected by the water temperature detection unit 14 is lower than a predetermined value, the number of rotations of the drum in the centrifugal force process is increased so that the washing water easily passes through the clothes and is effectively included in the laundry. The cleaning power can be increased by promoting the replacement of the cleaning liquid. On the other hand, the higher the temperature of the washing water detected by the water temperature detection unit 14, the less the rotation speed of the drum in the centrifugal force process, so that the washing water having a high detergent concentration is replaced with the washing water contained in the laundry. Cleaning can be performed with the minimum power consumption of the drum drive motor, and operation with high energy saving can be realized.

  In the above embodiment, the water temperature detection unit 14 is installed in the circulating water channel 11 to detect the water temperature of the washing water that has passed through the receiving cylinder 2, but the present invention is not limited to this. It is good also as a structure which installs between the water supply valve 5 and the detergent case 18, and detects the water temperature of the water immediately after having been supplied. That is, it can also be set as the structure which detects the water temperature of the water which is not mixed with the detergent.

  In the above embodiment, the cleaning step in which the drum high-speed rotation step (S14) is performed only once is exemplified, but the present invention is not limited to this. For example, when the amount of laundry is large, the drum high-speed rotation step (S14) and the drum low-speed agitation step (S16) are alternately repeated a plurality of times, thereby increasing the frequency of the drum high-speed rotation step and making dirt more powerful. It can also be set as the washing process which can be discharged to.

  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 a drum type having both a washing function and a clothes drying function. It can also be applied to washing and drying machines. The same effect can be achieved not only in a drum type washing machine in which the rotation axis of the drum 1 is horizontal or inclined, but also in a washing machine in which the rotation axis is vertical.

(Embodiment 2)
In the present embodiment, the heating unit 28 for heating the washing water and the water temperature set by the user in the input setting unit 30 are input, the washing water temperature is adjusted to the input water temperature, and washing and rinsing are performed. In the drum type washing machine provided with a controller that sequentially controls each step of dehydration, the rotational speed of the centrifugal washing step is determined according to the set water temperature. The other embodiments use the first embodiment. Hereinafter, it will be described in detail with reference to FIG.

  When the laundry is put into the washing machine and washing is started, 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 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 it is determined that the amount of laundry is “low”, the low water level WL1 is set as the set water level. When it is determined that the amount of laundry is “medium”, WL2 of the “medium” water level is set as the set water level. When it is determined that the amount of laundry is “large”, the WL3 at the “high” water level is set as the set water level (S2). The controller 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 heating unit 28 starts heating the washing water (S6).

  If the water temperature setting input by the input setting unit 30 is 30 ° C. (YES in S7), the parameter R is 150 rpm (S8). If the water temperature setting is 40 ° C. (YES in S9), the parameter R is 100 rpm. (S10) If the set water temperature is 40 ° C. or higher (for example, 60 ° C. or 90 ° C.) (NO in S9), parameter R is set to 0 rpm, that is, drum high-speed stirring is not performed (S11). In other words, the lower the water temperature detected by the water temperature detection unit 14 is, the larger the parameter (number of rotations at the time of drum high-speed rotation) is.

  Next, when the water temperature detected by the water temperature detector 14 reaches the set water temperature (YES in S12), a stirring process for rotating the drum 1 at a low speed is started (S13). 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 is preferably 50 rpm or less, depending on the amount of laundry. The rotation direction may be the same direction or periodically switched.

  At this time, the control unit 70 controls the circulation pump 12 to circulate the washing water in which the detergent is sufficiently dissolved from the discharge port 10 into the drum 1 through the circulation water channel 11, thereby supplying the washing water to the laundry. Promotes penetration. 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.

  After a certain time (for example, 2 minutes) has elapsed (YES in S14), if the set water temperature is relatively low 30 ° C. or 40 ° C. (YES in S15), the drum 1 is set to the rotation speed of the parameter R set above. And rotate at high speed (S16).

  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 150 rpm or more at which the moisture contained in the laundry can be forcibly separated by centrifugal force, but the temperature of the water heated by the heating unit 28 exceeds 40 ° C. In some cases, the washing water easily penetrates between the fibers of the clothing, so the speed of rotating at high speed is kept low, or even if high speed rotation itself is not performed, sufficient washing power is ensured only with low-speed drum agitation. It is possible.

  Therefore, if the set water temperature is 40 ° C. or higher (NO in S15), the drum low speed stirring is not performed and the drum low speed stirring is continued.

  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 is rotated at a high speed, the washing water in the vicinity of the clothing fiber containing the detergent made of the surfactant attached to the soiling substance of the clothing fiber is contained in the low speed stirring process performed previously. Removal by centrifugal force 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 the centrifugal washing process in which the drum 1 is rotated at a high speed, the washing water that has not yet adhered dirt is effective for the laundry. It is possible to promote replacement of the washing water contained in the garment fiber by being absorbed. The promotion of the replacement of the washing water is not limited to the circulation shower performed by driving the circulation pump 12, but is also performed by immersing a part of the laundry in the washing water that accumulates below the bottom of the receiving cylinder 2. That is, the washing water is dehydrated from the laundry by the centrifugal force generated by the high-speed rotation of the drum 1, and on the other hand, the replacement of the washing water is promoted by containing the washing water that accumulates below the bottom of the receiving cylinder 2. Therefore, the water level at this time needs to be such that the laundry in the drum 1 rotating at high speed can come into contact with the washing water below the bottom of the drum 1.

  The time for rotating the drum 1 at a high speed may be a relatively short time as long as the washing water contained in the laundry can be squeezed out, for example, 30 seconds (YES in S17).

  Subsequently, after the drum high-speed stirring, the stirring step of rotating the drum 1 at a low speed is performed again (S18). In this step, the circulation pump 12 is started in the same manner as in step S13, 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 centrifugal washing process of rotating the drum 1 at a high speed, the dirt remaining on the fiber again by the chemical force of the detergent and the mechanical force accompanying the rotation of the drum 1 by continuing the stirring process of the low-speed rotation of the drum 1 The material can be further stripped off. If there is a high concentration of soil substances in the wash water between the fibers, there is a concern of reattachment to the fibers, but the dirt that is surrounded by the detergent surfactant is difficult to reattach and is not attached to the dirt. Since only the surfactant sticks to the laundry, it can work against the remaining dirt.

  The time for the stirring step may be 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. For example, in this embodiment, if the washing process is completed after 5 minutes (YES in S19), the calculation and the constant table can be reduced, so the load on the control unit 70 can be reduced.

  As described above, when the water temperature input by the input setting unit 30 is lower than a predetermined value, by increasing the number of rotations of the drum in the centrifugal force process, the washing water can easily pass through the clothes, and the laundry is effectively made into laundry. The cleaning power can be increased by promoting replacement of the included cleaning liquid. On the other hand, as the water temperature input by the input setting unit 30 is higher, the number of rotations of the drum in the centrifugal force process is reduced or the centrifugal force process is not performed. Washing can be performed with the minimum power consumption of the drum drive motor that can be replaced with washing water, and energy-saving operation can be realized.

  In addition, in said embodiment, although the washing | cleaning process which implements a centrifugal force washing | cleaning process (S16) only once was illustrated, it is not limited to this. For example, when the amount of laundry is large, the drum high-speed rotation step (S16) and the drum low-speed stirring step (S18) are alternately repeated a plurality of times, thereby increasing the frequency of the drum high-speed rotation step and making dirt more powerful. It can also be set as the washing process which can be discharged to.

  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 a drum type having both a washing function and a clothes drying function. It can also be applied to washing and drying machines. The same effect can be achieved not only in a drum type washing machine in which the rotation axis of the drum 1 is horizontal or inclined, but also in a washing machine in which the rotation axis is vertical.

  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)
10 Discharge port 11 Circulating water channel 12 Circulating pump (moisture containing means)
14 Water temperature detection part 18 Detergent case 28 Heater (heating part)
70 Control unit 100 Case

Claims (6)

A drum that houses and rotates laundry;
A receiving cylinder for housing the drum;
A drum driving unit for driving the drum;
A water temperature detector that detects the temperature of the wash water used for washing;
A controller for inputting the output of the water temperature detector and controlling the washing process;
The washing step includes a stirring step in which the drum rotates at a low speed that does not cause the laundry to stick to the drum, and a high speed at which the laundry is stuck to the wall surface of the drum. Consisting of a rotating centrifugal washing process,
The said control part is a washing machine which made the rotation speed of the said drum high in the said centrifugal force washing | cleaning process, when the water temperature detected by the said water temperature detection part is lower than predetermined temperature. A drum that houses and rotates laundry;
A receiving cylinder for housing the drum;
A drum driving unit for driving the drum;
A heating section for heating the washing water used for washing;
An input setting unit for setting the temperature of the washing water used for washing;
A controller that controls the washing process by adjusting the washing water to the inputted water temperature by inputting the water temperature set by the input setting unit;
The washing step includes an agitation step in which the drum rotates at a low speed that does not allow the laundry to stick to the drum, and a high speed at which the laundry is stuck to the wall surface of the drum. Consisting of a rotating centrifugal washing process,
The said control part is a washing machine which made the rotation speed of the said drum in the said centrifugal force washing | cleaning process high, so that the water temperature set in the said water temperature detection part is low. It further includes a water-containing means for containing the washing water in the laundry,
The washing machine according to claim 1 or 2, wherein the water-containing means causes the laundry to contain the washing water in a centrifugal washing step. The washing machine according to claim 3, wherein the water-containing means is a circulating shower that sucks the washing water collected at the bottom of the receiving cylinder and discharges the washing water again to the laundry in the drum. The washing machine according to claim 3, wherein the moisture-containing means contains moisture by immersing a part of the laundry in the washing water accumulated at the bottom of the receiving cylinder. A washing / drying machine comprising: the drum type washing machine according to any one of claims 1 to 5; and a drying means for drying the washed clothes.

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