JP5768218B2 - Drum washing machine - Google Patents

Description

  The present invention relates to a drum-type washing machine that controls each process such as washing, rinsing, dehydration, and drying in a rotating drum containing laundry.

  Conventionally, this type of drum-type washing machine has a configuration as shown in FIG. 1 (see, for example, Patent Document 1).

  In this washing machine, the water tank 3 is supported in a suspended state in the washing machine body 9 by a suspension structure (not shown). A rotating drum 1 formed in a bottomed cylindrical shape is supported in the water tank 3 with its axial direction inclined downward from the front side to the back side. On the front side of the aquarium 3 is formed a clothing doorway 8 leading to the opening end of the rotary drum 1, and by opening the door 7 that closes the opening provided on the upward inclined surface on the front side of the washing machine body 9 so that it can be opened and closed. The laundry can be taken in and out of the rotary drum 1 through the clothing entrance 8.

  The rotating drum 1 is formed with a large number of water passage holes 2 communicating with the inside of the water tank 3 on its peripheral surface, and provided with stirring protrusions (not shown) at a plurality of positions on the inner peripheral surface. The rotary drum 1 is rotationally driven in the forward and reverse directions by a drum motor 5 attached to the back side of the water tank 3. In addition, a water supply path 13 and a drainage path 10 are connected to the water tank 3 by piping, and water is poured and drained into the water tank 3 by controlling the water injection valve 12 and the drainage valve 11.

  When the door 7 is opened, laundry and detergent are put into the rotating drum 3 and the operation is started by the operation of the input means 18 provided on the front surface of the washing / drying body 9, for example, the water supply path is formed in the water tank 3. A predetermined amount of water is poured from 13 and the drum 1 is rotated by the drum motor 5 to start the washing process. By the rotation of the rotating drum 1, the laundry accommodated in the rotating drum 1 is lifted in the rotating direction by the stirring protrusion provided on the inner peripheral wall of the rotating drum 1, and is dropped from a lifted appropriate height position. Is repeated, so that the laundry has the effect of tapping and washing.

  After the required washing time, the dirty washing liquid is discharged from the drainage path 10, the washing liquid contained in the laundry is dehydrated by a dehydrating operation that rotates the rotating drum 1 at a high speed, and then the water supply path 13 is placed in the water tank 3. The rinsing process is carried out by pouring water. Also in this rinsing process, the laundry stored in the rotating drum 1 is rinsed by repeating the stirring operation of being lifted and dropped by the stirring protrusion by the rotation of the rotating drum 1.

  The drum-type washing machine has a function of drying laundry stored in the rotary drum 1, and the air in the water tank 3 is exhausted and dehumidified by a circulation air passage (not shown), and dried by heating. Air is blown into the water tank 3 again. A dehumidifying unit such as an evaporator (not shown), a heat pump including a heating unit such as a condenser, and a circulating fan as a blowing unit are provided in the middle of the circulation air path. The evaporator and the condenser form a heat exchange part with the circulating air and are arranged at the lowest part of the circulating air blowing path.

  By rotating the circulation fan, air flows in the circulation air flow path so that the air in the rotating drum 1 containing the laundry flows through the water hole 2 from the water tank 3 to the circulation fan side. It is exhausted to the passage, and moisture is condensed on the evaporator located upstream of the circulation fan to dehumidify it and heated by heat exchange with the condenser, so that it is always dry and hot air.

  The dried high-temperature air is sent out from the circulation fan to the air duct to the water tank 3 and blown into the water tank 3. The high-temperature dry air blown into the water tank 3 enters the rotary drum 1 through the water passage hole 2 and escapes to the water tank 3 while being exposed to laundry such as clothes, and is again introduced into the circulating air introduction pipe line. A drying process is implemented by the repetition of the circulation of the air in the above circulation ventilation path.

  In the drying process using this circulation ventilation path, foreign matter such as lint generated mainly from laundry such as clothes is circulated in the air circulated through the circulation ventilation path, clogging the evaporator and condenser, A filter that removes foreign matter in the circulating air is provided in the middle of the circulation air flow path, as it tends to hinder the drying process such as biting into the rotating part of the circulation fan and accumulation on the inner surface of the circulation fan. It has been.

  In addition, depending on the quality of the laundry, there are some that easily contain water (such as cotton) and some that do not contain water (such as chemical fibers). The dehydration speed and time are determined so that they can be removed to some extent. Also, in the drying process, the sequence is such that it can be sufficiently dried even for those that easily contain water.

JP 2009-95528 A

  However, in such a conventional drum type washing machine, there is no determination of what is likely to contain water (such as cotton) and what is difficult to contain water (such as chemical fiber) depending on the quality of the laundry, and high speed dewatering operation is performed. If there are many things that are hard to contain water in the laundry, it takes longer than the necessary dehydration time, and it causes unnecessary wrinkles due to unnecessary drying in the drying process. There was a problem such as end.

  The present invention solves the above-described conventional problems, and a cloth that easily contains water and a cloth that does not easily contain water due to the difference between the brake time of the first dewatering operation and the brake time of the second dewatering operation. By determining the quality, it is necessary to shorten the dehydration time when there is a lot of laundry that does not contain water, so that it takes longer than the necessary dehydration time, and the drying process unnecessarily dries. Therefore, an object of the present invention is to provide a drum-type washing machine that can solve the problem that wrinkles are often generated.

  In order to achieve the above object, the present invention achieves a rotating drum having a rotation center axis in a horizontal direction or an inclination direction, a water tank holding the rotating drum in a washing machine main body so as to be rotatable, and rotating the rotating drum. Based on the detection of the drum motor to be driven and the acceleration detection means attached to the water tub or the washing machine main body, the detection of the acceleration detection means can detect the acceleration of one axis or two or three axes orthogonal to each other, Control means for controlling the washing operation of rinsing, dehydration and drying and for controlling the rotation of the rotating drum, the control means in the dehydration operation, the brake time of the first dehydration operation and the brake during the second dehydration operation The cloth quality is judged based on the time difference.

  As a result, when there is a large amount of laundry that does not contain water, the difference between the brake time for the first dewatering operation and the brake time for the second dewatering operation is reduced, so it is necessary to lengthen the time for the subsequent high-speed dewatering operation. In addition, the time required for dehydration can be shortened.

  The drum-type washing machine according to the present invention is such that the laundry does not easily contain water by performing the cloth quality determination based on the difference between the brake time of the first dewatering operation and the brake time of the second dewatering operation. When there is a large amount, there is little difference between the brake time of the first dewatering operation and the brake time of the second dewatering operation, so that it is not necessary to increase the time of the subsequent high-speed dewatering operation, and the time required for dewatering can be shortened.

Sectional drawing of the drum-type washing machine in embodiment of this invention Block diagram of a part of the control circuit of the drum type washing machine The figure for demonstrating the spin-drying | dehydration process motor rotation speed of the drum type washing machine The figure for demonstrating the rinse process motor rotation speed of the drum type washing machine Flow chart of dehydration operation at the time of cloth quality judgment of the drum type washing machine

  A first invention includes a rotating drum having a rotation center axis in a horizontal direction or an inclination direction, a water tank that holds the rotating drum in a washing machine main body so as to be rotatable, and a drum motor that rotationally drives the rotating drum. , 1-axis or orthogonal 2-axis or 3-axis acceleration can be detected, acceleration detecting means attached to the water tub or the washing machine body, and based on the detection of the acceleration detecting means, washing, rinsing, dehydration, and Control means for controlling the washing operation of drying and the rotation of the rotating drum, the control means in the dehydration operation, due to the difference between the brake time of the first dehydration operation and the brake time of the second dehydration operation, The cloth quality is judged.

  As a result, when there is a large amount of laundry that does not contain water, there is little difference between the brake time of the first dewatering operation and the brake time of the second dewatering operation, so there is no need to lengthen the time for the subsequent high-speed dewatering operation. , The time required for dehydration can be shortened.

  According to a second aspect, in the first aspect, the first dewatering operation time and the second dewatering operation time are changed, and the fabric quality is determined based on a difference between the first and second brake times. With this feature, the cloth quality can be determined even during intermittent dehydration before rinsing.

  According to a third invention, in the first or second invention, the vibration value during the dehydrating operation detected by the acceleration detecting means is used as a correction coefficient, and the brake time of the first dehydrating operation or / and the second dehydrating operation are performed. By correcting the brake time of operation, the cloth quality can be accurately determined.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Further, the present invention is not limited by this embodiment.

(Embodiment 1)
FIG. 1 is a cross-sectional view of a washing machine according to an embodiment of the present invention.

  As shown in FIG. 1, the rotating drum 1 is formed in a bottomed cylindrical shape, and a large number of water passage holes 2 are provided on the entire surface of the rotating drum 1 and are rotatably installed in the water tank 3. A rotating shaft 4 is provided in a substantially inclined direction at the center of rotation of the rotating drum 1, and the axial center direction of the rotating drum 1 is inclined downward from the front side toward the back side, so that clothes can be easily taken in and out from the front door 7. The so-called lick drum structure is adopted.

  A drum motor 5 attached to the rear surface of the water tank 3 is connected to the rotary shaft 4 to drive the rotary drum 1 to rotate in the forward and reverse directions. An opening provided on the upward inclined surface on the front side of the water tub 3 is covered with a door 7 so as to be freely opened and closed. The door 7 is opened, and laundry is put into and out of the rotating drum 1 through a clothing entrance 8.

  The aquarium 3 is supported by a spring body (not shown) so as to be able to swing and sway from the washing machine main body 9. One end of the drainage path 10 is connected to the lower part of the aquarium 3, and the other end of the drainage path 10 is connected to the drainage valve. 11, the washing water in the water tank 3 is drained. A water supply valve 12 above the washing machine body 9 supplies water into the water tank 3 through a water supply path 13.

  The control device 16 includes a control means 17 that drives the drum motor 5, the water supply valve 12, the drain valve 11, and the like, and controls a series of washing steps such as washing, rinsing, and dehydration. The information is transmitted to the input means 18 for setting the driving course and the like and the display means 19 for informing the driving situation.

  Two height adjusting functions 14 are attached to both front lower ends of the substantially square-shaped washing machine body 9, and a screw 14 a is formed on the shaft portion of the washing machine body 9 to rotate the washing machine body 9 up and down. The height can be adjusted.

  As shown in the circuit diagram in which a part of the control circuit in FIG. 2 is made into a block diagram, the control device 16 and the like have a control means 17 composed of a microcomputer, and the control means 17 is switched via a switching means drive circuit 20. The means 21 is controlled, the operations of the drain valve 11 and the water supply valve 12 are controlled, and the washing operation and the like are controlled.

  At this time, the control means 17 variably controls the rotational speed of the drum motor 5 via the inverter drive circuit 23 based on information from the position detection means 22a, 22b, 22c for detecting the position of the rotor of the drum motor 5. To do.

  FIG. 3 shows the rotation speed [r / min] of the drum motor 5 on the vertical axis, and shows the movement of the rotation speed of the drum motor 5 in the dewatering process, and FIG. 5 is a flowchart of the dewatering operation at the time of cloth quality determination. Before the main dehydration step, which is a high-speed dehydration operation, there are preliminary dehydration steps 1 to 3 that operate at low speed rotation in order to remove excess water from the laundry and reduce vibration of the machine during high-speed dehydration. The fabric quality is determined using the difference between the brake times T1 to T3 of the low speed dewatering of the preliminary dewatering 1 to 3. A time such as a difference in brake time | T1-T2 | or | T2-T3 | is measured. It is determined that the smaller the difference is, the more difficult it is to contain water in the laundry, and the time required for subsequent dehydration can be shortened by making the time for the final dehydration shorter than the set time.

  In addition to the dehydration process, in the rinsing process, different times are set for the first dehydration time T6 of intermittent dehydration and the second dehydration time T7 of intermittent dehydration to change the dehydration rate of the laundry. FIG. 4 shows the movement of the rotational speed of the drum motor 5 in the rinsing process, with the vertical axis representing the rotational speed [r / min] of the drum motor 5. The cloth quality is determined using the difference between the intermittent dewatering brake times T4 and T5 when the intermittent dewatering time is changed. The time of the brake time difference | T4-T5 | is measured. It is determined that the smaller the difference is, the more the laundry does not easily contain water, and the time and time of preliminary dehydration thereafter and the time of main dehydration are made shorter than the set time, so that the time required for dehydration can be shortened.

  The acceleration detecting means 15 is configured to detect acceleration in the three axial directions of the water tank 3 in the front-rear direction (X-axis), the left-right direction (Y-axis), and the vertical direction (Z-axis). In addition, the vibration of the water tank 3 or the washing machine main body 9 during the dehydration process is detected.

  In the dehydration process of the washing operation, the rotating drum 1 is rotated at a high speed by the drum motor 5, and therefore the vibration of the water tank 3 or the washing machine main body 9 becomes large when the laundry is unbalanced due to the bias of the laundry in the rotating drum 1. This vibration is output by detecting the acceleration of the acceleration detecting means 15. When the output value is out of the allowable range, the high-speed rotation of the rotary drum 1 is stopped.

  When calculating the values of the dehydrating brake times T1 to T5, the acceleration before the end of the dehydrating operation is detected by the acceleration detecting means 15, and the correction coefficient k determined by the acceleration, that is, the vibration value is multiplied by each dehydrating brake time T1 to T5. The value T1a to T5a (T1a = k × T1) is used to measure the time of the brake time difference (for example, | T1a−T2a |). When the laundry unbalance is large and the vibration of the aquarium 3 becomes large, the brake time becomes long. Therefore, an increase in the brake time due to the unbalanced state is expected, and any or all of the brake times T1 to T5 are corrected. Thus, it is possible to accurately detect the difference in brake time and increase the accuracy of the cloth quality determination.

  As described above, the drum-type washing machine according to the present invention uses the dehydration brake time of the dehydration process and the rinsing process, and the difference between the brake time of the first dehydration operation and the brake time of the second dehydration operation. Since the cloth quality can be determined, it is useful for washing machines in general.

DESCRIPTION OF SYMBOLS 1 Rotating drum 2 Water flow hole 3 Water tank 4 Rotating shaft 5 Drum motor 6 Baffle 7 Door 8 Clothes door 9 Washing machine main body 10 Drainage path 11 Drainage valve 12 Water supply valve 13 Water supply path 14 Height adjustment function 15 Acceleration detection means 16 Control device DESCRIPTION OF SYMBOLS 17 Control means 18 Input means 19 Display means 20 Switching means drive circuit 21 Switching means 22a, 22b, 22c Position detection means 23 Inverter drive circuit 24 Inverter circuit 25 AC power supply 26 Full wave rectifier circuit 27 Reactor 28 Smoothing capacitor 29 Rectifier

Claims (3)

A rotating drum having a central axis of rotation in the horizontal or inclined direction;
A water tank that rotatably holds the rotating drum in the washing machine body;
A drum motor for rotating the rotary drum;
Acceleration detecting means that can detect acceleration of one axis or two or three axes orthogonal to each other, and is attached to the water tub or the washing machine body;
Based on the detection of the acceleration detection means, comprising a control means for controlling washing, rinsing, dehydration, and drying washing operations and rotation of the rotating drum,
The drum-type washing machine characterized in that the control means determines the quality of the cloth based on the difference between the brake time of the first dewatering operation and the brake time of the second dewatering operation in the dewatering operation. . 2. A drum type washing machine according to claim 1, wherein the control means changes the first dehydrating operation time and the second dehydrating operation time.   By determining the vibration value during the dehydrating operation detected by the acceleration detecting means as a correction coefficient and correcting the brake time of the first dehydrating operation and / or the brake time of the second dehydrating operation, the fabric quality is determined. The drum type washing machine according to claim 1 or 2, wherein the drum type washing machine is implemented.

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