JP4345592B2 - Washing and drying machine - Google Patents

Description

  The present invention relates to a washing and drying machine that consistently performs from washing to drying.

  A conventional washing / drying machine of this type will be described with reference to FIGS. As shown in FIG. 8, the outer tub 2 is suspended and supported by the suspension 3 inside the housing 1, and the suspension 3 absorbs vibrations of the outer tub 2 during operation. Inside the outer tub 2, the inner tub 4 that has a rotation center axis in the vertical direction and accommodates the laundry and the drying object is rotatably arranged, and clothing (laundry and laundry) is placed on the inner bottom of the inner tub 4. A stirring blade 5 for stirring the object to be dried is rotatably arranged. As shown in FIG. 8, the stirring blade 5 is formed in a pan shape whose outer periphery is inclined.

A number of small holes (not shown) are provided in the inner peripheral wall of the inner tank 4, and a fluid balancer 6 is provided above the holes.
Is provided. In the vicinity of the bottom center of the outer tub 2 and the inner tub 4, there is a washing / dehydrating shaft 7 having a hollow and biaxial structure, and a clutch 8 for switching the transmission of rotational force to the washing / dehydrating shaft 7 during washing or dehydrating. Is provided. A motor 9 is provided in the outer tub 2 and serves as a driving means for driving the inner tub 4 and / or the stirring blade 5 via the clutch 8.

  The air blowing means 10 is disposed above the housing 1 and takes in outside air from the intake port 11 and sends air to the heating means 12 to create warm air. The warm air is sent into the outer tub 2 from the extendable blower hose 14. The outer tub 2 is provided with an outer tub cover 15 that hermetically covers the upper surface of the outer tub 2, and the outer tub cover 15 has a hot air supply port 16 that communicates with the blower hose 14 and supplies hot air. It is open.

  The outer tub cover 15 is provided with an inner lid 17 that can be opened and closed so that clothes can be taken in and out. Further, the outer tank cover 15 is provided with an exhaust port 18 for exhausting warm air exchanged with clothing, and the exhaust port 18 is provided with an exhaust port filter 19 for collecting dust contained in the exhausted air. ing.

  The case cover 20 covers the upper part of the case 1 and includes an openable / closable outer lid 21, an operation display unit 22, and a water supply valve 23 for supplying water to the inner tank 4. Further, a drain valve 24 for draining water in the outer tub 2 is provided at the bottom of the outer tub 2. A control device 25 that controls electrical components such as the motor 9 is disposed in the outer tub 2.

  As shown in FIG. 9, the control device 25 includes a control unit 26, a power supply circuit 27, and a load control unit 28.

  As shown in FIG. 10, the operation display unit 22 includes an input unit 29 that inputs operation start and pause, and a display unit 30 that displays remaining time and the like.

  As shown in FIG. 10, the input means 25 includes a switch 29a for setting the amount of water, a washing time setting switch 29b for setting the washing time, a rinsing frequency setting switch 29c for setting the rinsing frequency, and a dehydration time setting switch for setting the dehydration time. 29d, a drying time setting switch e for setting a drying time, an operation course selection switch 29f for selecting a plurality of operation courses, a start / pause switch 29g, a power-off switch 29h, a power-on switch 29i, and the like.

  The display means 30 includes a water amount display unit 30a, a washing time display unit 30b, a rinse count display unit 30c, a dehydration time display unit 30d, a drying time display unit 30e, a plurality of operation course selection display units 26f, and the like. Etc.).

  The control means 26 is constituted by a microcomputer, and the motor 9, the clutch 8, the blower means 10, the heating means 12, the water supply valve 23, the drain valve via the load control means 28 according to the input set by the input means 29. The load such as 24 and the display means 30 are controlled according to a predetermined sequence. The power supply circuit 27 supplies power to the control means 26 and the like. 33 is a cloth amount detecting means for detecting the amount of clothes thrown into the inner tub 4. The stirring blade 5 is rotated in the absence of water, and the amount of clothes is determined by the magnitude of the current flowing through the motor 9 at that time. Judgment is made.

The operation of the washer / dryer in the above configuration will be described. When the outer lid 21 and the inner lid 17 are opened, clothes (laundry) are put into the inner tub 4 and the operation is started, the power of the motor 9 is agitated via the washing / dehydrating shaft 7 by the clutch 8 of the transmission mechanism. The stirring blade 5 is rotated in a state where there is no water transmitted to the blade 5, and the amount of clothing is determined by the cloth amount detection means 33, and the amount of water, washing time, rinsing time, and dehydration time corresponding to the amount of clothing are determined. Displayed on the display means 30.

  In the washing process, the water supply valve 23 is opened to supply water to a predetermined water level, and then the motor 9 is driven. At this time, the power of the motor 9 is transmitted to the stirring blade 5 through the washing / dehydrating shaft 7 by the clutch 8 of the transmission mechanism section, and the clothes are stirred and washed in water by rotating the stirring blade 5 and then drained. The valve 24 is opened and drained, and water is supplied again in the next rinsing process, and the clothes are rinsed in the same manner as the washing process.

  In the dehydration process, after the washing is completed, the drain valve 24 is opened to drain the water in the outer tub 2, the clutch 8 of the transmission mechanism is switched to the dehydration side, and the power of the motor 9 is supplied via the washing / dehydration shaft 7. Then, the water is transmitted to the inner tub 4 and rotated, and centrifugal force is applied to the clothes to separate the moisture from the clothes and perform dehydration. When the dehydration process is completed, the process proceeds to the drying process.

  When the drying process is started, the motor 9 is driven to rotate the stirring blade 5 slowly to peel off the clothes stuck to the inner wall of the inner tank 4 by the centrifugal force at the time of dehydration. 4, after the tank rotation drying process of drying the clothes while rotating 4, the stirring blade 5 is momentarily rotated in the forward and reverse directions so that the clothes are left upward in the inner tank 4. A stirring / drying step of drying with stirring is performed.

At the same time, warm air heated through the heating means 12 is sent into the inner tank 4 from the warm air supply port 16 by the blowing means 10. The hot air exchanges heat with clothes in the inner tub 4 and is then exhausted from the exhaust port 18. The air containing moisture is discharged to the outside through the gaps of the housing 1, and drying proceeds (for example, , See Patent Document 1).
JP 2003-305292 A

  However, in the configuration of such a conventional washing and drying machine, an appropriate amount of water, a washing time, a rinsing time, and a dehydrating time that are predicted according to the judgment value of the amount of clothes at the start of operation are displayed. If automatic operation according to the amount of cloth is sufficient, it is possible to perform washing to dehydration automatically without setting the amount of water and washing time, but the necessary drying time is not only for the amount of clothing but also for clothing. Since the time varies depending on the quality, the time required for drying cannot be automatically set, and it is necessary for the user to select and set the time which is considered appropriate by the drying time setting switch 29e.

  Also, even if the user sets a drying time that seems appropriate, if the set time is too short, uneven drying will occur, and conversely, if the set time is too long, the clothes will be dry but useless. There were problems such as continuing the dry operation.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and provides a washing and drying machine that performs a drying operation with an appropriate drying time and without uneven drying of clothes even if the user does not bother to set the drying time. With the goal.

In order to solve the above-described conventional problems, the washing and drying machine of the present invention includes an outer tub that is elastically supported in a housing, an inner tub that is rotatably supported in the outer tub, and stores clothing. A stirring blade rotatably provided at the inner bottom of the inner tank, a driving means for driving the inner tank and / or the stirring blade, a blowing means for sending heated air into the inner tank, and the inner An exhaust port for exhausting air in the tank, temperature detection means for detecting the temperature of air exhausted from the exhaust port, control means for sequentially controlling a series of steps of washing, rinsing, dehydration and drying , A cloth amount detecting means for detecting the amount of clothes in the tank, and the control means determines the end of drying of the clothes based on a change in temperature detected by the temperature detecting means in the drying process, and also detects the cloth amount. Detected by means
According to the amount of cloth, the determination value for determining the end of drying of the clothes is corrected, and the correction of the determination value is such that the amount of change in temperature is such that the amount of cloth is smaller than the amount of cloth. Accordingly, it is possible to accurately detect the end of drying of the clothes, and it is possible to prevent uneven drying and excessive drying operation.

The washing and drying machine of the present invention can accurately detect the end of drying of clothes according to the amount of cloth, and can prevent uneven drying and excessive drying operation.

According to a first aspect of the present invention, an outer tub elastically suspended in a housing, an inner tub that is rotatably supported in the outer tub and accommodates clothes, and an inner bottom of the inner tub are rotatably provided. A stirring blade, a driving means for driving the inner tank and / or the stirring blade, a blower means for sending heated air into the inner tank, an exhaust port for exhausting the air in the inner tank, Temperature detection means for detecting the temperature of air exhausted from the exhaust port, control means for sequentially controlling a series of steps of washing, rinsing, dehydration, and drying, and cloth amount detection for detecting the amount of clothing in the inner tub And the control means determines the end of drying of the garment based on a change in temperature detected by the temperature detecting means in the drying process, and determines the clothing according to the cloth amount detected by the cloth amount detecting means. The judgment value for determining the end of drying is corrected to compensate for the judgment value. The amount of change in temperature, by which is adapted a laundry amount small> laundry amount large, there is no need for the user to set the drying time, depending on the amount of laundry, to detect the end of exactly clothes drying The drying operation is not sufficient and drying unevenness is not generated, and the drying operation is not continued unnecessarily even after the drying of the clothes is finished.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the present embodiment.

(Embodiment 1)
Below, the washing-drying machine in the 1st Embodiment of this invention is demonstrated using FIGS. FIG. 1 is a sectional view of the washing / drying machine according to the present embodiment, FIG. 2 is a block diagram of the washing / drying machine, and FIG. 3 is a plan view of an operation display unit of the washing / drying machine. The same parts as those in the conventional example are given the same reference numerals, and the description thereof is omitted.

  In the present embodiment, as shown in FIG. 1, a temperature detection unit 31 that detects the temperature of air exhausted from the exhaust port 18 is provided in the housing 1, and the detection output is input to the control unit 26. It is what I did. Further, as shown in FIG. 3, the drying time display unit 30e of the display means 30 is provided with an LED (not shown) for displaying that the drying time is “automatic”.

  Below, operation | movement and an effect | action of the washing dryer in the said structure are demonstrated. As shown in FIG. 1, when the outer lid 21 and the inner lid 17 are opened by automatic operation from washing to drying, clothes (laundry) are put into the inner tub 4 and the operation is started, the clutch 8 of the transmission mechanism section is started. The power of the motor 9 is transmitted to the stirring blade 5 through the washing / dehydrating shaft 7, and the amount of clothes is determined by the cloth amount detecting means 33. The amount of water, the washing time, the number of times of rinsing, and the dehydration according to the amount of clothes are determined. The time is displayed on the display means 30, and regarding the drying, since it is the time until the clothes dries, “automatic” is displayed on the display means.

  At this time, the amount of clothes is determined as eight dry ranks as shown in Table 1 based on the value of the current flowing through the motor 9 when the stirring blade 5 is started. When the drying rank is determined, the time T1 of the drying process 1 of the drying process and the time T2 of the drying process 2 are determined, and in the drying operation after washing to dewatering, the drying process proceeds based on the drying rank. .

  The drying process is divided into three drying processes 1, 2, and 3. Since the clothes in the drying process 1 are sufficiently wet, the cloth amount detecting means mainly operates by blowing the warm air while rotating the inner tub 4 at a high speed (about 700 r / min) and blowing the moisture of the clothes by centrifugal force. T1 is performed based on the drying rank determined in accordance with the amount of clothing detected in 33, and then, in the drying process 2, an operation of blowing warm air while rotating the inner tub 4 at a low speed (about 35 r / min) is performed in T2. Do. Then, in the drying process 3, the stirring blade 5 is reversed and the operation of blowing warm air while stirring clothes is performed.

  FIG. 4 shows a change in temperature detected by the temperature detection means 31 as the drying progresses. The temperature is room temperature at the start, and rises as the drying progresses, and gradually rises from the end of the drying step 1. When the drying process 3 is entered, the operation is changed from the operation of blowing warm air while rotating the inner tub 4 to the operation of blowing warm air while rotating the stirring blade 5 and stirring clothes. At this time, the temperature is increased by stirring the clothes. Warm air is also applied to clothes that have not been exposed to much wind, and the moisture release speed from the clothes is promoted more than the drying steps 1 and 2.

  As a result, when the drying process 3 is started, the temperature detected by the temperature detecting means 31 temporarily decreases, and at the same time, the temperature change is stabilized by making the forward rotation time, the stationary time, and the reverse rotation time of the stirring blade 5 uniform. Can be Specifically, the forward rotation time of the stirring blade 5 is set to 0.4 seconds, the stationary time is set to 1.2 seconds, and the reverse rotation time is set to 0.4 seconds. And the temperature detected by the temperature detecting means 31 is stabilized.

  For example, FIG. 5 shows the temperature change detected by the temperature detecting means 31 when the drying operation is performed only in the drying process 1 and the drying process 2. In this case, the temperature does not stabilize until the end, but rises while wobbling. Moreover, although it is the timing which transfers to the drying process 3 from the drying process 2 as shown in FIG. 6, if the timing which transfers to the drying process 3 is overdue, the temporary fall of the temperature after entering the drying process 3 will not be seen. . This is because the clothes are almost dry.

  In order to reliably detect a temporary drop in temperature, the inventors have confirmed through experiments that the drying rate of the garment must shift to the drying step 3 when the drying rate is about 85% to about 90%. The operation time T1, T2 of the appropriate drying processes 1 and 2 is determined according to the amount of clothes, and is determined so as to rise stably after the temperature change of the temperature detecting means 31 is temporarily reduced. It is important to carry out the process. This is because, unless the temperature detected by the temperature detecting means 31 is stabilized, it becomes difficult to determine that the clothes are dry due to a change in the temperature detected by the temperature detecting means 31.

The determination of the end of drying of the clothing is made after entering the drying step 3. As shown in FIG. 7, when the minimum value and the maximum value of the temperature detected by the temperature detection means 31 after entering the drying process 3 reach a predetermined temperature change (deg), it is determined that the clothes are dry. . By doing so, it takes a short time to reach a certain temperature change in clothes that are easy to dry (a combination of clothes with a lot of fiber), and it takes time to change to a predetermined temperature in clothes that are difficult to dry (a combination of clothes that have a lot of cotton). Therefore, in any combination of clothes, it is possible to accurately detect the end of drying of clothes and end the drying operation.

(Embodiment 2)
Table 2 is a list of determination values when determining the end of clothes drying of the washing / drying machine according to the second embodiment of the present invention.

  In the present embodiment, a predetermined temperature change (deg) at the time of determining that the clothes are dried is changed according to the atmospheric temperature at the start of the drying operation. The same parts as those of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In Table 2, when the ambient temperature is low, the temperature detected by the temperature detection means 31 is also low, and the temperature rise due to the clothes becoming dry appears significantly. (Deg) is also made larger. For example, when the drying rank is “3” and the atmospheric temperature is 5 ° C., when the temperature change detected by the temperature detecting means 31 reaches 8 deg in the drying step 3, it is determined that the drying is finished. .

  Conversely, when the atmospheric temperature is high, the temperature change (deg) at the time of determination is made smaller. For example, when the drying rank is “3” and the ambient temperature is 30 ° C., when the temperature change detected by the temperature detecting means 31 reaches 6 deg in the drying step 3, it is determined that the drying is finished.

  As described above, according to the present embodiment, by correcting the determination value for determining the end of drying according to the atmospheric temperature during the drying process, it is more accurately determined that the clothes have been dried, It is possible to prevent useless drying operation.

  Further, in the present embodiment, as shown in Table 2, a predetermined temperature change (deg) for determining that the clothes are dried is changed according to the determined amount of cloth. Specifically, when the amount of cloth is small, the heat capacity of the entire system becomes small, and therefore, the temperature rise due to the clothes becoming dry appears significantly. Therefore, the temperature change (deg) for determining that the clothes are dry (deg) ) Is also larger. On the contrary, when there are many clothes, this reverse, ie, a temperature change (deg), is made small. For example, in the same table, when the ambient temperature is 20 ° C. and the cloth amount is determined to be as low as 1 kg, when the temperature change reaches 7 deg, it is determined that the drying is finished, and the cloth amount is determined as 4.5 kg. If the temperature change reaches 6 deg, it is determined that the drying is finished.

As described above, the temperature change (deg) of the determination value when determining the end of drying according to the amount of clothing.
By applying the correction to, it can be determined more accurately that the clothes are dry.

As described above, the washing and drying machine of the present invention can accurately detect the end of drying of clothes according to the amount of cloth and can prevent uneven drying and excessive drying operation. Very useful for dryers.

Sectional drawing of the washing-drying machine in Embodiment 1 of this invention Block diagram of the washer / dryer Top view of the operation display section of the washer / dryer Graph of temperature detected by temperature detection means of the washer / dryer Temperature graph showing a reference example Temperature graph showing other reference examples Graph of temperature detected by the same temperature detection means Cross-sectional view of a conventional washing and drying machine Block diagram of the washer / dryer Top view of the operation display section of the washer / dryer

DESCRIPTION OF SYMBOLS 1 Housing | casing 2 Outer tank 4 Inner tank 5 Stirring blade 9 Motor (drive means)
DESCRIPTION OF SYMBOLS 10 Air supply means 18 Exhaust port 26 Control means 31 Temperature detection means

Claims (1)

An outer tub that is elastically suspended in a housing, an inner tub that is rotatably supported in the outer tub and accommodates clothes, an agitating blade that is rotatably provided on the inner bottom of the inner tub, and Drive means for driving the inner tank and / or the agitating blade, blower means for sending heated air into the inner tank, an exhaust port for exhausting the air in the inner tank, and exhaust from the exhaust port comprising a temperature detecting means for detecting the temperature of the air, washing, rinsing, dehydration, and control means for sequentially controlling a set of strokes of drying, and a laundry amount detecting means for detecting an amount of clothes in the inner tub, wherein The control means determines the end of drying of the clothes based on a change in temperature detected by the temperature detecting means in the drying process, and determines the end of drying of clothes according to the amount of cloth detected by the cloth amount detecting means. The judgment value is corrected, and the correction of the judgment value is performed by changing the temperature. The amount is, washing and drying machine was set to be the cloth amount small> cloth amount multi.

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