JP2009082258A - Drum type washing and drying machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drum type washing and drying machine which mitigates a stiff feeling while keeping excellent washing of laundry. <P>SOLUTION: The drum type washing and drying machine includes: a rotary drum whose rotary axis center line is horizontal or inclined; a plurality of lifters existing so as to extend in the direction of the rotary axis and projected to the inner side of the rotary drum; an outer tub for placing the rotary drum inside and accumulating washing water; an electric motor for rotationally driving the rotary drum; a rotation control means for controlling the rotation speed of the electric motor; a heater for heating the washing water accumulated in the outer tub; and a temperature sensor for detecting the temperature of the washing water. The operation of the electric motor is controlled in the rotation control means so that the rotation speed of the rotary drum becomes 30 rpm-40 rpm or 50 rpm-60 rpm when the washing water detection temperature of the temperature sensor is 30°C-40°C. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention provides a rotating drum having a rotation axis centered horizontally or inclined, a plurality of lifters extending in the direction of the rotation axis and projecting inside the rotation drum, and the rotation drum. The present invention relates to a drum-type washing / drying machine that has an outer tub installed therein and stores washing water, an electric motor that rotationally drives the rotating drum, and a heater that heats the washing water collected in the outer tub.

  A drum-type washing and drying machine having the above-described configuration is disclosed in, for example, Japanese Patent Application Laid-Open No. 2005-6767 (Patent Document 1).

Japanese Patent Laying-Open No. 2005-6767

  The drum-type washing and drying machine disclosed in Patent Document 1 is washed up by a lifter, and the laundry falls and hits against the inner bottom surface of the rotating drum. I hate it.

  Relaxing the scouring will reduce the irritating feeling but will make the laundry unclean.

  In view of the above-described problems, an object of the present invention is to provide a drum-type washing / drying machine in which the washing feeling is satisfactorily maintained and the feeling of tingling is alleviated.

  The present invention provides a rotating drum having a rotation axis centered horizontally or inclined, a plurality of lifters extending in the direction of the rotation axis and projecting inside the rotation drum, and the rotation drum. An outer tank for storing washing water; an electric motor for rotating the rotating drum; a rotation control means for controlling the number of rotations of the electric motor; a heater for heating the washing water stored in the outer tank; A temperature sensor for detecting the temperature of the water, and when the washing water detection temperature of the temperature sensor is 30 ° C. to 40 ° C., the rotation control is performed so that the rotation speed of the rotating drum is 30 rpm to 40 rpm or 50 rpm to 60 rpm. The operation of the electric motor is controlled by means.

  ADVANTAGE OF THE INVENTION According to this invention, the drum-type washing machine with which the feeling which is wrinkled is eased can be provided, without reducing the washing | cleaning of a laundry.

  Before describing an embodiment of the present invention with reference to the drawings, an outline of the present invention will be described.

  In a drum type washing machine, when the laundry is dried in the sun after the washing course from washing to rinsing to final dehydration, especially the clothes of towel yarn feels irritating to the skin. This is a feature that is also a drawback of the drum type washing machine.

  The drum-type washing machine is a washing method in which it is washed at the time of washing and rinsing, so that it is allowed to drop when the laundry in the rotating drum reaches the maximum height, especially when washing with normal temperature water (unheated water). The rotation number of the rotating drum is set in.

  The rotation speed is generally (40-50) rpm when the diameter of the rotating drum is (500-600) mm. When the laundry is dropped from the maximum height of the rotating drum, the washing power is increased for tapping and washing away the dirt on the laundry.

  If the washing water temperature is changed from room temperature water to (30-40) ° C., the surface active action effect that is the effect of the detergent on the laundry, that is, the activation of the permeation, emulsification, and dispersion action is remarkable due to the effect of the water temperature. As a result, it is possible to greatly improve the cleaning effect of removing dirt adhering to the laundry well.

  Therefore, when the washing water temperature is (30 to 40) ° C., the rotational speed of the rotating drum is set to (30 to 40) rpm or (50 to 60) rpm, and the falling height of the laundry is reduced, thereby By reducing the mechanical force, it is possible to carry out washing with good washing finish with little feeling of tingling while maintaining the washing power equivalent to room temperature water.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  First, an outline of a drum type washing and drying machine will be described with reference to FIGS. Here, the drum type washing / drying machine will be described as an example. However, the drum type washing / drying machine of the present invention includes a drum type washing machine because it becomes a washing machine when the drying function is stopped.

  An outer frame 2 is placed on a base 1 formed of a resin molded product. The outer frame 2 is made by combining a steel plate and a resin molded product.

  A door 3 for taking in and out the laundry is provided in front of the outer frame 2, and the door 3 is opened and closed by operating the push button switch 4.

  A drain hose fixing hole 5 is provided on the side surface of the outer frame 2. A plurality of handles 6 are provided for carrying and moving the washing machine main body. A detergent tray 7 and a drying filter 8 are attached to the upper surface of the outer frame 2 on the left and right with respect to the central display unit 10 and the operation unit 9.

  Further, a drain hose 11 is drawn out from a side surface portion of the base 1, and a leg portion 12 attached with rubber is attached to the bottom portion.

  A lint filter 13 that collects lint generated from the washing machine is detachably attached to the lower part of the front left side of the outer frame 2.

  As shown in FIG. 2, an outer tub 20 is provided inside the outer frame 2. The lower part of the outer tub 20 is supported by a suspension 29, and the upper part is supported by a tension spring 34 disposed in the front and rear direction.

  The suspension 29 supports the entire weight of the outer tub 20 and has a strong structure. Further, a damping mechanism or the like is provided for absorbing the vertical vibration of the outer tub 20 generated during the dehydration operation and preventing abnormal vibration due to resonance of the outer tub 20 at the start of dehydration.

  Further, the pulling spring 34 supported from the upper part of the outer tub 20 is provided to prevent the outer tub 20 from collapsing in the front-rear direction and to reduce front-back, up-down, left-right vibration during dehydration.

  At the time of washing too easily, water necessary for washing is supplied through the water supply hose 15, the water supply electromagnetic valve 16, and the detergent charging case 18 connected to the tap. Supply / stop of water supply is performed by opening / closing the water supply electromagnetic valve 16.

  The supplied water is stored at the bottom of the outer tub 20 as washing water and rinsing water.

  In the detergent charging case 18, a detergent necessary for washing is charged, and a softening agent for improving the finish is charged when rinsing.

  At the time of washing, the water supplied from the water injection hose 17 is introduced from the upper part of the outer tub 20 through the flexible hose 19 while dissolving the detergent in the detergent introduction case 18.

  The rotating drum 21 inside the outer tub 20 has the loaded laundry 23 with the door 3 opened. The outer periphery of the opening of the rotating drum 21 reduces vibration due to unbalance due to the laundry 23 during dehydration. A fluid balancer 30 is provided.

  A plurality of dewatering holes 22 for dewatering moisture contained in the laundry 23 at high speed during dehydration are provided inside the rotating drum 21. A plurality of lifters 27 are provided inside the rotary drum 21 so that the laundry 23 can be lifted up during washing.

  The rotating drum 21 is directly connected to a drum driving motor 26 via a main shaft 25 connected to a rotating drum metal flange 24. The drum driving motor 26 is attached to a metal flange 24 fixed to the outer tub 20.

  In this embodiment, the drum driving motor 26 is a magnet-embedded inner rotor and the stator is a DC brushless motor having concentrated windings.

  A rubber bellows 31 made of an elastic body is attached to the opening of the outer tub 20.

  The inside of the door 3 is constituted by a heat-resistant glass door 32, and serves to maintain water tightness between the outer tank 20 and the bellows 31 and the heat-resistant glass door 32. This prevents water leakage during washing, rinsing and dehydration.

  Water that has become unnecessary after being rinsed too easily or water that has been dehydrated from the laundry 23 during dehydration is drained from the drain hose 11 to the outside by opening the drain valve 28.

  In addition, a sheathed heater 35 is provided at the bottom of the outer tub 20 for raising the temperature of the washing water 37 to (30-40) ° C. during washing. The water temperature of the washing water 37 is detected by the temperature sensor 36, and the sheathed heater 35 is energized from the lead wire 35a so as to become a prescribed water temperature.

  The washing water 37 is about 25 ° C. at the time of washing, and in the case of normal temperature water (20 ° C.), in order to increase the temperature by about (30-40) ° C., when the calorie of the sheathed heater 35 (heating heater) is 1000 W, It rises in about 17-37) minutes.

  An operation process of the drum washer / dryer will be described with reference to an operation process block diagram of the drum washer / dryer shown in FIG.

  In this operation process, the dirt adhered to the laundry 23 is removed, the detergent by rinsing is rinsed, and the moisture contained in the laundry 23 is dehydrated by the centrifugal force due to the high-speed rotation of the rotary drum 21. A general automatic washing course for automatically performing a series of steps such as discharging the water is shown in this block diagram.

  Hereinafter, each step will be described based on the block diagram.

  After the drain valve 28 is closed, the water supply process 50 is performed by operating the water supply electromagnetic valve 16. In the washing step 51, when water necessary for washing is supplied into the outer tub 20, the drum driving motor 26 rotates and the rotating drum 21 rotates.

  The rotation speed of the rotating drum at this time is 40 to 50 rotations per minute, and the laundry 23 is lifted up by the lifter 27 in the rotating drum 21 by performing a right rotation and a left rotation every few minutes after a pause. While washing by tapping.

  When the washing process 51 is completed, the dirt adhering to the laundry 23 is removed by washing, and the process proceeds to a draining process 52 for discharging dirty washing water out of the washing machine.

  After the drainage is completed, the process proceeds to a dehydration step 53 for dehydrating the detergent contained in the laundry 23. In the dewatering step 53, the rotating drum 21 is rotated at a high speed, and the laundry 23 is dewatered from the plurality of dewatering holes 22 provided on the inner wall of the rotating drum 21 by centrifugal force. The rotation speed at this time is 800 to 1500 rotations per minute.

  When the dehydration process 53 is completed, the detergent contained in the laundry 23 is rinsed and the process proceeds to the rinsing process 54. Before entering the rinsing step 54, the necessary fresh water is supplied into the outer tub 20 in the water supply step 50 for supplying fresh water as in the washing step.

  In the present embodiment, 25 to 30 liters of fresh water necessary for rinsing is supplied in the same manner as washing.

  When a prescribed amount of fresh water is supplied, the process automatically proceeds to the rinsing process 54, and the amount of detergent contained in the laundry 23 is rotated at a low speed (around 45 rotations per minute) as in the washing process. Remove.

  In the present embodiment, the rinsing is performed twice, but the number of times of the rinsing process 54 is 2-3. After the rinsing process 54 is completed, drainage is performed, and the process proceeds to the final dehydration process 55 in order to sufficiently dehydrate the moisture contained in the laundry 23.

  The dewatering time of the final dewatering step 55 is generally 5 minutes or longer, and the rotating drum 21 is rotated at a high speed, and the moisture in the laundry 23 is removed by centrifugal force. The dehydration rate at this time is 60 to 65%.

  A circuit for driving the drum type washing and drying machine will be described with reference to FIG.

  The AC 100V commercial power supply 60 is connected to the filter circuit 64 through a fuse 63 arranged in parallel with the power switch via the outlet 60.

  From the back of the filter circuit 64, power is directly supplied to various electrical components and the rectifier circuit 65.

  A switching power supply 65 and an inverter drive circuit 67 for supplying a low-voltage DC power supply are connected to the rectifier circuit. The inverter drive circuit 67 rotates the drum drive motor 26 by controlling the inverter drive circuit 67 based on a signal from a rotational position sensor 71 provided in the drum drive motor 26.

  The entire drum type washing and drying machine is controlled by the microcomputer 72.

  The microcomputer 72, the inverter drive circuit 67, the rotation position sensor 71 and the like are referred to as the rotation control means 100 of the drum drive motor 26.

  Electric components directly driven by the commercial power source 60 include a water supply solenoid valve 16, a drain valve 28, and a main water supply switching valve 16, which are connected to relay contacts 73A and 73B and relay windings 74A and 74B connected in series. The flowing current is controlled by the microcomputer 72 to operate.

  By using a common voltage of DC24V from the switching power supply 66 as the driving voltage, the circuit configuration of the switching power supply 66 can be simplified.

  Further, the operation unit 9, the display unit 10, and the temperature sensor 36 (shown in FIG. 2) are connected to the microcomputer 72. This temperature sensor 36 detects the temperature of the washing water accumulated in the outer tub 20.

  The rotation control means 100 including the microcomputer 72 is configured to rotate the rotating drum 21 at 30 rpm to 40 rpm or 50 rpm when the temperature of the washing water accumulated in the outer tub 20 is heated to about 30 ° C. to 40 ° C. by the sheath heater 35 (heating heater). The operation is controlled to be about ~ 60 rpm.

  When the water temperature of the washing water is a normal temperature (20 ° C.) that is less than 30 ° C. to 40 ° C., the rotation control means 100 controls the operation of the rotary drum 21 so as to be about 40-50 rpm.

  The washing of the rotating drum will be described with reference to FIGS.

  This will be described in the order shown in the figure.

  FIG. 5 shows a shampoo that is normally washed.

  The rotary drum 21 has an inner diameter ΦD of (500 to 600) mm and a rotation speed of (40 to 50) rpm.

  Washing with a rotating drum with the rotation axis centered horizontally or inclined is performed so that the laundry 23 is provided with a large mechanical force to the laundry 23 in order to remove dirt adhering to the laundry 23. The rotational speed of the rotary drum 21 is set so that it falls when it reaches H1 when it reaches the highest position. At this time, H1 and D are almost equal and the drop height is maximum. With respect to the drop position, the drop height when dropping from the near side in the rotation direction with respect to the vertical center axis is maximized. The drop height is low before and after this position. That is, the rotation speed is higher when compared with the maximum position, and when compared with the maximum position, when the rotation speed is lower.

  FIG. 6 is a washing example 1 with warm water.

  The temperature sensor 36 indicates that the washing water has been warmed by the sheathed heater 35 over a period of 17 minutes to 35 minutes during normal washing from room temperature water (20 ° C.) to (30-40 ° C.). , The rotating drum 21 rotates the rotation speed N at a high speed (50-60) rpm.

  Since the inner diameter ΦD of the rotating drum 21 is the same and the rotational speed N is increased by about (10-20) rpm compared to the case of FIG. 5, the centrifugal force of the laundry 23 is increased, and the highest position of the drum diameter ΦD The laundry 23 falls from the height H2 that has passed.

  In this case, since the fall height H2 is lower than H1, the mechanical force of tapping washing received by the laundry 23 is reduced. However, since the washing water temperature is high, dirt can be removed by the warm water effect. As a result, it is possible to reduce the mechanical force of tapping and maintain the normal cleaning power together.

  FIG. 7 is a washing example 2 with warm water.

  As in the case of FIG. 6, warm water is used for the washing water. However, the rotational speed N of the rotary drum 21 is set to (30-40). The centrifugal force of the rotating drum 21 is reduced, the height H3 of the laundry 23 lifted by the lifter 27 is lower than H1, and the mechanical force applied to the laundry 23 is reduced, but the dirt attached to the laundry is caused by the warm water effect. drop down. As a result, it is possible to reduce the mechanical force of tapping and maintain the normal cleaning power together.

  In this way, warm water is used as washing water, and the rotational speed of the rotating drum 21 is increased or decreased compared to that of room temperature water, thereby reducing the mechanical force of tapping and maintaining the normal cleaning power. It can be realized together, and the feeling of washing can be alleviated.

  The relationship between the rotational speed of the rotating drum and the drop height will be described with reference to FIG.

  Φ of the rotating drum 21 is (500 to 600) mm. The range where the rotational speed of the rotary drum 21 is (40 to 50) rpm is the maximum drop height. Actually, it depends on the height and position of the lifter 27.

  The relationship between the rotational speed of the rotating drum and the cleaning power will be described with reference to FIG.

  Φ of the rotating drum 21 is (500 to 600) mm, and the temperature of the washing water is normal temperature (20 ° C.). The range where the rotational speed of the rotary drum 21 is (40 to 50) rpm is the maximum drop height.

  The relationship between the number of rotations of the rotating drum and fabric damage will be described with reference to FIG.

  Φ of the rotating drum 21 is (500 to 600) mm, and the temperature of the washing water is normal temperature (20 ° C.). The damage to the laundry increases in proportion to the improvement in cleaning due to the tapping effect.

  The damage index of the laundry is proportional to the texture of the lint of the laundry and the feeling of tingling. That is, if the detergency is increased by tapping, cloth damage, fluffing, and an irritating feeling increase.

  The texture test of the laundry will be described with reference to FIG.

  This figure shows the result of a five-step sensory test on the texture of the laundry 23 after the laundry which has been rinsed and dehydrated from the laundry is sun-dried.

  In the sensory test, it is generally accepted that the level is 4 or less. As the rotating drum 21 rotates, the laundry 23 falls in the rotating drum 21 and when the diameter ΦD of the rotating drum is (500 to 600) mm in the sensory test based on the feeling of wrinkle after sundrying the laundry 23 If the height is 400 mm or less, it will be improved.

  However, if the drop height is set to 400 mm or less, the mechanical force due to tapping is reduced and the cleaning power is reduced.

  Finally, description will be made based on FIG.

  This figure shows the content of examining the relationship between the falling height of the laundry and the detergency index from the viewpoint of the temperature of the washing water.

  The diameter ΦD of the rotating drum 21 is (500 to 600) mm. In the case of normal temperature, the mechanical force due to falling from a drop height of around 600 mm is large, and the effect of tapping is increased to maximize the cleaning power.

  By increasing the water temperature to (30-40) ° C., the detergency improves even if the drop height is lowered. Therefore, even if the drop height is set to 400-500 mm, higher performance than the detergency in normal temperature water is obtained. Can do.

  That is, the sheath heater 35 is provided in the outer tub 20, the temperature of the washing water is set to (30 to 40) ° C. by the control of the temperature sensor 36, and the rotation speed of the rotary drum 21 is set to (30 to 40) rpm or (50 to 60). By controlling and operating at rpm, it is possible to provide a washing machine with a good washing finish in which the mechanical force of tapping washing is reduced without degrading the washing power, and the feeling of tingling is eased.

  In the present invention, the cleaning rate increases by increasing the temperature of the cleaning water with respect to the rotational speed at which the drop height is maximized, but the cleaning rate corresponding to this increase is increased or decreased. Thus, the fall height is lowered to reduce the mechanical force, and the washing rate of the laundry 23 is not lowered, and the feeling of tingling is reduced.

1 is an external perspective view of a drum-type washing machine according to an embodiment of the present invention. 1 is a longitudinal sectional view of a drum type washing machine according to an embodiment of the present invention. It is an operation process block diagram which concerns on the Example of this invention and shows the operation process of a drum type washing machine with a block. FIG. 4 is a drive circuit diagram of a drum type washing machine according to an embodiment of the present invention. The figure which concerns on the Example of this invention and shows the state of the tapping washing of the laundry accompanying rotation of a rotating drum (the 1). FIG. 9 is a diagram (part 2) illustrating a state of tapping washing of laundry with rotation of a rotating drum, according to an embodiment of the present invention. FIG. 4 is a diagram (No. 3) illustrating a state of tapping washing of the laundry accompanying rotation of the rotating drum, according to the embodiment of the present invention. FIG. 4 is a graph relating to the embodiment of the present invention and showing the relationship between the rotational speed of the rotating drum and the falling height of the laundry. FIG. 5 is a graph relating to the embodiment of the present invention and showing the relationship between the rotational speed of the rotating drum and the cleaning power index. FIG. 5 is a graph relating to the embodiment of the present invention and showing the relationship between the rotational speed of the rotating drum and the fabric damage index. FIG. 5 is a diagram related to an example of the present invention and is a graph showing the relationship between the falling height of the laundry and the sensory level (finished feeling of stiffness) of the laundry. FIG. 6 is a diagram related to an example of the present invention, and shows the relationship between the falling height of the laundry and the detergency index while changing the temperature of the washing water.

Explanation of symbols

20 Outer tank 21 Rotating drum 27 Lifter 35 Seeds heater (heater)
36 temperature sensor 37 electric motor 100 rotation control means

Claims (3)

A rotating drum having a rotation axis centered horizontally or inclined;
A plurality of lifters extending in the direction of the axis of rotation and present so as to protrude inside the rotating drum;
An outer tub in which the rotating drum is placed and the washing water is stored;
An electric motor for rotationally driving the rotating drum;
Rotation control means for controlling the rotation speed of the electric motor;
A heater for heating the washing water accumulated in the outer tub;
It has a temperature sensor that detects the temperature of the washing water,
When the washing water detection temperature of the temperature sensor is 30 ° C. to 40 ° C., the rotation control means controls the operation of the electric motor so that the rotation speed of the rotating drum is 30 rpm to 40 rpm or 50 rpm to 60 rpm. Drum type washing and drying machine. A rotating drum having a rotation axis centered horizontally or inclined;
A plurality of lifters extending in the direction of the axis of rotation and present so as to protrude inside the rotating drum;
An outer tub in which the rotating drum is placed and the washing water is stored;
An electric motor for rotationally driving the rotating drum;
Rotation control means for controlling the rotation speed of the electric motor;
A heater for heating the washing water accumulated in the outer tub;
It has a temperature sensor that detects the temperature of the washing water,
When the temperature of the washing water detected by the temperature sensor is less than 30 ° C. to 40 ° C., the rotation control means controls the operation of the electric motor so that the rotation speed of the rotating drum is 40 rpm to 50 rpm. Drum type washing and drying machine. In the drum type washing and drying machine according to claim 1 or 2,
A drum-type washing and drying machine, wherein the diameter of the rotating drum is 500 mm to 600 mm.

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