JP4300928B2 - Washing machine - Google Patents

Description

  The present invention relates to a washing machine that performs a series of steps of washing, rinsing, and dewatering.

  Conventionally, a typical washing machine performs washing by rotating a stirring blade called a pulsator, and the configuration of this type of washing machine will be described with reference to FIGS. 6 and 7.

  As shown in FIG. 6, the outer tub 1 includes a washing / dehydrating tub 3 in which a stirring blade 2 is rotatably disposed at the bottom, and is hung from a housing 5 by a suspension bar 4. The motor 6 drives the stirring blade 2 via the V-belt 7 and the speed reduction mechanism / clutch 8 during washing, and rotates the washing / dehydration tank 3 during dehydration.

  The drain valve 9 drains the washing water in the washing and dewatering tub 3 and is disposed below the outer tub 1. The water level detection means 10 detects the water level in the washing and dewatering tub 3. The lid 11 is provided on the upper side of the housing 5. The fluid balancer 12 reduces vibration during dehydration, and is provided in the upper part of the washing and dehydrating tank 3.

  The control device 13 controls the motor 6 and the like, and is configured as shown in FIG. 7. The voltage detection means 14 detects the counter electromotive force during inertial rotation of the motor 6, and outputs the output. Input to the cloth amount detecting means 15, and the cloth amount detecting means 15 detects the amount of laundry in the washing and dewatering tub 3. The operation display means 16 is operated by a user to make a desired input and display an operation state.

  The control means 17 sequentially controls each step of washing, rinsing, and dehydration based on outputs from the water level detection means 10, the cloth amount detection means 15, the operation display means 16, and the like. The storage means 18 stores data necessary for sequentially controlling each process of washing, rinsing and dehydration by the control means 17. The power switching unit 19 controls energization of the motor 6, the drain valve 9, the water supply valve 20, and the like based on the output of the control unit 17. In addition, 21 is a phase advance capacitor of the motor 6, 22 is a power switch, and 23 is a commercial power source.

In the above configuration, the dehydration speed and dehydration time were set to be constant between each of the washing, rinsing and dehydration strokes and in the dehydration stroke.
JP-A-7-265575

  In such a conventional washing machine, since the dehydration speed and dehydration time are set to be constant, there is a problem that dewatering efficiency does not increase when the water temperature is low such as in winter. In addition, when washing is performed using warm water that promotes deformation of the outer tub 1 and the washing / dehydrating tub 3 in various recent usage environments, the outer tub 1 and the washing / dehydrating tub 3 are easily affected by temperature. For this reason, the dehydration rotation speed cannot be set to a high rotation speed because of the safety of securing the structural strength and durability, and there is a problem that the time must be extended in order to increase the dewatering efficiency.

  The present invention solves the above-mentioned problem, allows setting the dehydration rotation speed and dehydration time according to the water temperature in the outer tub and the washing and dehydrating tub, and ensures the structural strength and durability depending on the water temperature. The purpose is to reduce variation in dewatering efficiency.

In order to achieve the above object, the present invention provides a washing / dehydrating tub rotatably in an outer tub, and a stirring wing rotatably provided in the inner bottom of the washing / dehydrating tub. It is driven by the drive means, the operation of the drive means is controlled by the control means, and a series of steps of rinsing and dehydration are sequentially controlled, and the water temperature in the outer tub and the washing / dehydration tub is detected by the water temperature detection means and, control means, washing, rinsing, at least one intermediate dehydration step and dehydration step carried out between the respective leg of the dehydrating operation, in accordance with the output of the water temperature detection means, at least dewatering of the dewatering rotation number, dewatering time The time can be changed.

  This makes it possible to set the dehydration speed and dehydration time according to the water temperature in the outer tub and washing / dehydration tub, to ensure structural strength and durability depending on the water temperature, and to vary the dewatering efficiency. Can be reduced.

As described above, according to the invention described in claim 1 of the present invention, the dewatering rotation speed and dewatering time can be set in accordance with the water temperature in the outer tub and the washing and dewatering tub. And durability can be secured, and variation in dewatering efficiency due to water temperature can be reduced.

According to a first aspect of the present invention, the washing and dewatering tank rotatably provided in the outer tub, and a stirring blade rotatably provided in the inner bottom portion of the washing and dewatering tank, the washing and dewatering tank and driving means for driving said stirring blades, and controls the operations such as the drive unit, washing, rinsing, and control means for sequentially controlling a set of strokes of dehydration, the water temperature of the outer tub and the washing and dewatering the water tank and a water temperature detecting means for detecting, said control means, washing, rinsing, at least one intermediate dehydration step and the dehydrating operation performed between each stroke of the dehydrating operation, depending on the output of the coolant temperature detecting means , which was changeable at least dewatering time of the dewatering rotation number, dewatering time can be set dehydration speed and dewatering time to match the temperature of the outer tub and the washing and dewatering in the water tank, the water temperature by the structure Strength Can ensure durability, it is possible to further reduce the variation in the dewatering efficiency by the water temperature.

Invention according to claim 2, the washing and dewatering tank rotatably provided in the outer tub, rotation and agitation blades so provided freely, the washing and dewatering tank and the stirring inner bottom portion of the washing and dewatering tank cloth and driving means for driving the blade, and controls the operations such as the drive unit, washing, rinsing, to detect and control means for sequentially controlling a set of strokes of dehydration, the quantity of laundry in the washing and dewatering the water tank and a quantity detecting means, the control means, washing, rinsing, at least one intermediate dehydration step and the dehydrating operation performed between each stroke of the dehydrating operation, in accordance with the output of said laundry weight detecting means, dehydrated The dehydration time can be changed at least among the rotation speed and dehydration time, and the dehydration rotation speed and dehydration time can be set according to the amount of laundry, reducing the variation in dewatering efficiency due to the amount of laundry. can do.

Invention of claim 3, the washing and dewatering tank rotatably provided in the outer tub, rotation and agitation blades so provided freely, the washing and dewatering tank and the stirring inner bottom portion of the washing and dewatering tank driving means for driving the blade, and controls the operations such as the drive unit, washing, rinsing, to detect and control means for sequentially controlling a set of strokes of dehydration, the temperature of the outer tub and the washing and dewatering the water tank Water temperature detecting means, and cloth amount detecting means for detecting the amount of laundry in the washing and dewatering tub, the control means comprising an intermediate dehydration process performed between each of the washing, rinsing and dehydrating processes In at least one of the dewatering steps, at least the dewatering time can be changed among the dewatering speed and the dewatering time in accordance with the outputs of the cloth amount detecting means and the water temperature detecting means , and the laundry even when the water temperature is high When there is little quantity Can is that by setting the number of the dewatering rotation to high rotation speed, to improve the dewatering efficiency, to ensure structural strength and durability due to the amount of laundry in the water temperature and the laundry.

  Embodiments of the present invention will be described below with reference to the drawings. In addition, the thing of the same structure as a prior art example attaches | subjects the same code, and abbreviate | omits description.

Example 1
As shown in FIGS. 1 and 2, the control device 24 has a control means 25 constituted by a microcomputer, and controls the operations of the motor 6, the drain valve 9, the water supply valve 20, etc. via the power switching means 19. Sequentially controls a series of steps such as washing, rinsing and dehydration. The operation display means 16 sets a driving course or the like, and the control means 25 inputs information from the operation display means 16 and displays it based on the information to notify the user. The storage unit 18 stores data necessary for control by the control unit 25.

  The water temperature detecting means 26 is provided on the outer bottom of the outer tub 1 and detects the water temperature in the outer tub 1 and the washing / dehydrating tub 3, and its output is input to the control means 25 constituting the control device 24. . Here, the control means 25 can change the rotation speed and time of each dehydration process according to the output of the water temperature detection means 26.

  FIG. 3 shows a basic operation procedure of the washing machine. The control means 25 executes the steps in the order of the washing step 27, the intermediate dehydration step 28, the waterfall rinsing step 29, the intermediate dehydration step 30, the rinsing step (or water injection rinsing) 31, and the dehydration step 32.

  The operation in the above configuration will be described. When the laundry is put into the washing / dehydrating tub 3 and washing is started, the water supply valve 20 is opened to start water supply, and the water level detecting means 10 for detecting the water level detects the water level. When it reaches, the water supply valve 20 is closed and the washing process 27 is started.

  After the above operation is completed, an intermediate dehydration step 28 is performed. After the drainage valve 9 is opened and the washing water in the outer tub 1 is drained, the speed reduction mechanism / clutch 8 is switched to the dewatering side, and the power of the motor 6 is transmitted to the washing / dewatering tub 3 via the dewatering shaft for rotation. The water is separated from the laundry by applying centrifugal force to the laundry.

  Next, the control means 25 executes a waterfall rinse process 29. The drain valve 9 maintains an open state, and while the water supply valve 20 is opened and water is supplied, the washing and dewatering tub 3 is rotated intermittently by operating the motor 6 intermittently. Accordingly, water is supplied while the washing / dehydrating tub 3 rotates slowly, so that the laundry in the washing / dehydrating tub 3 is uniformly applied to the laundry and soaks into the entire laundry. Thereafter, the water supply valve 20 is closed, the motor 6 is driven, the washing and dewatering tub 3 is rotated, and an intermediate dewatering step 30 is performed.

  When the intermediate dehydration process 30 is finished, the control means 25 executes a rinsing process 31. In this process, as in the washing process 27, the control means 25 supplies water by opening the water supply valve 20 until the water level detection means 10 detects a predetermined water level. The drain valve 9 is closed before the rinsing step 31. When the predetermined water level is detected, the water supply valve 20 is closed. Then, the speed reduction mechanism / clutch 8 is switched to the washing side, and the stirring blade 2 is rotated by driving the motor 6 so that the rinsing is performed.

Therefore, when the rinsing process 31 is completed, the control unit 25 executes the dehydration process 32. In the dehydration step 32, the drain valve 9 is first opened to drain the water during rinsing. When the drainage is completed, the control means 25 switches the speed reduction mechanism / clutch 8 to the dewatering side, transmits the power of the motor 6 to the washing / dewatering tub 3 via the dewatering shaft, and rotates the dewatering process 32. The drain valve 9 maintains an open state. The operation ends when the dehydration process 32 ends.

  In the series of operations as described above, immediately before the drainage operation is started, the water temperature detecting means 26 detects the water temperature in the outer tub 1 and the washing and dewatering tub 3, and the intermediate dehydration in the next step is performed based on the water temperature at that time. The dewatering speed and dewatering time of the process 28, the intermediate dewatering process 30, and the dewatering process 32 are changed.

  If the dehydration speed and dehydration time are set to a fixed value and the water temperature when washing with tap water in the winter is extremely lower than room temperature, the dewatering efficiency tends to decrease. Therefore, dehydration is performed by setting the dehydration time to a time t1 (t1> t0) longer than the standard dehydration time t0. Conversely, if the water temperature is very high, such as washing with warm water, the dewatering efficiency is increased, so the dewatering time is set to a time t2 (t2 <t0) shorter than the standard dewatering time t0. Perform dehydration.

  Furthermore, when the dewatering speed is not fixed and the water temperature is extremely low, the dewatering efficiency is increased by setting the dewatering speed to a rotational speed r1 higher than the standard dewatering speed r0. Dehydration is performed at a time t3 shorter than the dehydration time t0. Further, when the water temperature is extremely high, if the dewatering rotation speed of the outer tub 1 or the washing and dewatering tub 3 is set to a high rotation speed, the amount of deformation becomes large, causing problems of strength and durability. . Therefore, safety is ensured by setting the rotational speed r3 lower than the dehydrating rotational speed r0, and dehydration is performed by setting the time t4 longer than the standard dehydrating time t0.

  The combination of the dehydration speed and dehydration time described above is an example, and can be changed according to various situations.

  As described above, according to the present embodiment, in the intermediate dehydration process 28 and the intermediate dehydration process 30 in each of the washing, rinsing, and dehydration processes, at least the time and the number of rotations according to the output of the water temperature detecting means 26. Since it is possible to change the dewatering speed and dewatering time according to the water temperature in the outer tub 1 and the washing and dewatering tub 3, it is possible to ensure the structural strength and durability depending on the water temperature. Furthermore, variation in dehydration efficiency can be reduced.

(Example 2)
As shown in FIG. 4, the rotation detection means 33 is constituted by a Hall IC or the like, and is attached to the motor 6 to detect the rotation of the motor 6. The cloth amount detection means 34 detects the amount of laundry in the washing / dehydrating tub 3, and the output of the rotation detection means 33 is input to the control means 35 constituting the control device 36, and the stirring blade 2 is moved by the motor 6. After driving, the amount of laundry in the washing and dewatering tub 3 is detected based on the degree of decrease in the rotational speed of the stirring blade 2 when the driving is stopped.

  The control means 35 receives the output of the cloth amount detection means 34 and decides which pattern to set a plurality of existing washing patterns and washing water levels. Here, the control means 35 can change the rotation speed and time of each dehydration process according to the output of the cloth amount detection means 34. Other configurations are the same as those of the first embodiment, and the same reference numerals are given and description thereof is omitted.

  The operation in the above configuration will be described. Since the basic operation is the same as that of the first embodiment, description thereof is omitted.

  As the setting of the spin speed and the spin time, when the amount of laundry is large, the spin efficiency is deteriorated, so that the spin time is increased and the spin is performed. On the other hand, when the amount of laundry is small, the dewatering efficiency is improved.

In addition, in order to ensure strength and durability, when the amount of laundry is large, dehydration is performed by lowering the spin speed and increasing the spin time.

  Thus, according to the present embodiment, in the intermediate dehydration process 28 and the intermediate dehydration process 30 in each of the washing, rinsing, and dehydration processes, at least of the number of rotations and time depending on the output of the cloth amount detection means 34. Since the time can be changed, it is possible to set the dehydration rotation speed and the dehydration time in accordance with the amount of laundry, and to reduce variation in dewatering efficiency due to the amount of laundry.

(Example 3)
As shown in FIG. 5, the water temperature detection means 26 is provided on the outer bottom portion of the outer tub 1 and detects the water temperature in the outer tub 1 and the washing and dewatering tub 3. Input to means 38.

  The rotation detection means 33 is constituted by a Hall IC or the like and is attached to the motor 6 to detect the rotation of the motor 6. The cloth amount detection means 34 detects the amount of laundry in the washing / dehydrating tub 3, and the output of the rotation detection means 33 is input to the control means 38 constituting the control device 37, and the stirring blade 2 is driven by the motor 6. After driving, the amount of laundry in the washing and dewatering tub 3 is detected based on the degree of decrease in the rotational speed of the stirring blade 2 when the driving is stopped.

  Here, the control means 38 can change the rotation speed and time of each dehydration process according to the outputs of the water temperature detection means 26 and the cloth amount detection means 34. Other configurations are the same as those of the first or second embodiment, and the same reference numerals are given and the description thereof is omitted.

  The operation in the above configuration will be described. Since the basic operation is the same as that of the first embodiment, description thereof is omitted.

  If the water temperature is extremely high as the setting of the dehydration rotation speed and the dehydration time, if the dehydration rotation speed of the outer tub 1 and the washing / dehydration tub 3 is set to a high rotation speed, the amount of deformation increases, Durability issues come out, but if the amount of laundry is small, the degree of influence will be very small, so depending on the amount of laundry, even if the water temperature is high, the dehydration rotation speed is high. Set to.

  As described above, according to the present embodiment, the cloth amount detection means for detecting the amount of laundry in the washing and dewatering tub in the intermediate dehydration step 28 and the intermediate dehydration step 30 in each of the washing, rinsing, and dehydration steps, According to the output of the water temperature detecting means for detecting the water temperature in the outer tub and the washing / dehydrating tub, at least the time can be changed among the rotation speed and time, so that the amount of laundry is small even when the water temperature is high. In this case, by setting the dehydration rotation speed to a high rotation speed, the dewatering efficiency can be improved, and the structural strength and durability depending on the water temperature and the amount of laundry in the laundry can be ensured.

1 is a longitudinal sectional view of a washing machine according to a first embodiment of the present invention. Block diagram of the washing machine The figure which shows the sequence of the basic operation procedure of the washing machine Block circuit diagram of the washing machine of the second embodiment of the present invention Block circuit diagram of the washing machine of the third embodiment of the present invention Vertical section of a conventional washing machine Block diagram of the washing machine

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outer tank 2 Stirring blade 3 Washing and dehydration tank 6 Motor (drive means)
25 Control means 26 Water temperature detection means

Claims (3)

And washing and dewatering tank rotatably provided in the outer tub, and a stirring blade rotatably provided in the inner bottom portion of the washing and dewatering tank, a drive means for driving the washing and dewatering tank and the stirring blade, the It controls the operation of a driving means, comprising washing, rinsing, and control means for sequentially controlling a set of strokes of dewatering, and a water temperature detecting means for detecting the temperature of the outer tub and the washing and dewatering in the water tank, the control means, washing, rinsing, at least one respective intermediate dehydration step carried out between stroke and the dehydrating operation dehydrating operation, in response to said output of the water temperature detection means, at least dewatering time of the dewatering rotation number, dewatering time A washing machine that can be changed. And washing and dewatering tank rotatably provided in the outer tub, and a stirring blade rotatably provided in the inner bottom portion of the washing and dewatering tank, a drive means for driving the washing and dewatering tank and the stirring blade, the controls the operation of a driving means, comprising washing, rinsing, and control means for sequentially controlling a set of strokes of dehydration, the laundry amount detecting means for detecting an amount of laundry in the washing and dewatering in the water tank, the control means, washing, rinsing, at least one intermediate dehydration step and the dehydrating operation performed between each stroke of the dehydrating operation, in accordance with the output of said laundry weight detecting means, at least dewatering of the dewatering rotation number, dewatering time A washing machine that can change the time . And washing and dewatering tank rotatably provided in the outer tub, and a stirring blade rotatably provided in the inner bottom portion of the washing and dewatering tank, a drive means for driving the washing and dewatering tank and the stirring blade, the controls the operation of a driving means, washing, rinsing, and control means for sequentially controlling a set of strokes of dehydration, the water temperature detecting means for detecting the temperature of the outer tub and the washing and dewatering in the water tank, the washing and dehydrating Cloth amount detection means for detecting the amount of laundry in the tub, and the control means in at least one of the intermediate dehydration process and the dehydration process performed during each of the washing, rinsing and dehydration processes , A washing machine capable of changing at least the dehydration time of the dehydration speed and dehydration time according to the outputs of the cloth amount detection means and the water temperature detection means .

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