JPH0767519B2 - Dryer - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to a dryer in which a remaining time required for a drying operation is displayed on an indicator.

[Technical Background of the Invention and Problems Thereof] Recently, in a dryer, the remaining time required for the drying operation is displayed on an indicator for practical convenience. 41990. That is, in this one, the drying load condition of the material to be dried is detected in the initial stage of the drying operation, the remaining time required for the drying operation is predicted, and the predicted remaining time value is down-counted while the numerical display mode is sequentially displayed on the display. In addition, at the end of the drying operation, when the dryness of the material to be dried reaches a predetermined reference value, the remaining required time of the drying operation is set as a fixed value, and the remaining required time fixed value is counted down. At the same time, the display is sequentially displayed in the numerical display mode, and the drying operation is terminated when the remaining required time fixed value becomes zero.

Thus, in this dryer, when the remaining required time estimated value is successively displayed and the remaining required time fixed value is subsequently displayed, the display time value changes significantly at the time of changing the display. Since naturalness may occur, a display adjustment period is provided between the remaining required time forecast value display period and the remaining required time fixed value display period, and the remaining required time value is not displayed during this display adjustment period. An attempt is made to eliminate the unnaturalness of the time value display, and the start time of this display adjustment period is set to be a certain time after the time when the remaining required time is predicted.

However, during the above-mentioned display adjustment period, no indication is given regarding time, so there is no indication of the time progress and it may be mistaken for a failure of the display unit. The time point displayed by is uncertain in time because it is determined by the predetermined dryness of the material to be dried, whereas the start time of the display adjustment period is fixed from the predicted time of the remaining required time by the required time. Therefore, there is a problem that the display adjustment period becomes excessively long, or conversely, the remaining required time confirmed value is displayed before the display adjustment period is reached, and the remaining required time confirmed value is displayed on the display unit. There was a problem to be solved that there was no idea of the time to go.

[Object of the Invention] The present invention provides a criterion for determining the progress of the drying operation even when the display adjustment period is provided between the remaining required time predicted value display period and the remaining required time fixed value display period. It is an object of the present invention to provide a dryer capable of obtaining the above-mentioned display and eliminating the erroneous recognition of the failure of the display, and moreover making the time width of the display adjustment period substantially constant.

[Summary of the Invention] The present invention includes a drying operation control device, and an indicator that is driven by the drying operation control device and displays a message related to the drying operation. To detect the drying load condition of the dried object, predict the remaining time required for the drying operation, and sequentially display the predicted remaining time value on the display while counting down, and detect the dryness of the dried object. Then, when it reaches a predetermined reference value, the remaining required time of the drying operation is set as a fixed value, and the remaining required time fixed value is sequentially displayed on the display while counting down. The drying operation control device detects the dryness of the material to be dried by a predictive reference value set at a constant level difference with respect to the predetermined reference value, and when the predictive reference value is reached, the predetermined reference value is reached. The display adjustment period is defined until reaching the quasi-value, and the remaining required time estimated value is displayed on the display device in the peculiar display mode mainly for numerical display during this display adjustment period. Thus, the present invention focuses on the fact that there is no large change in the time from the time when the dryness of the material to be dried reaches the above-mentioned predictive reference value to the time when it reaches the predetermined reference value, and that time period is referred to as the display adjustment period. At the same time, during this display adjustment period, the indicator is displayed in the peculiar mode mainly for the numerical display, so that it is possible to easily obtain the judgment standard of the time progress of the drying operation. .

[Embodiment of the Invention] A first embodiment of the present invention will be described below with reference to FIGS. 1 to 6.

First, in FIG. 2, reference numeral 1 is an outer box of a drum type dryer, and a dried object inlet / outlet 3 which is opened and closed by a door 2 is formed on the front surface thereof. Reference numeral 4 denotes a rotary drum arranged in the outer box 1, which has a circular opening 5 on the front side thereof rotatably supported by an annular support 6 fixed to the front side of the outer box 1 and attached at the center of the rear end face. The shaft 7 is rotatably supported by a horizontal frame 8 fixed to the rear side of the outer box 1. Reference numeral 9 denotes a fan casing arranged at the rear portion of the rotary drum 4, in which a double-bladed fan 10 is arranged. The fan 10 and the rotating drum 4 are rotationally driven by a motor 11 arranged on the upper part of the outer box 1. In this case, when the fan 10 rotates, the air in the rotary drum 4 passes through the lint filter 12, the exhaust hole 13, and the ventilation hole 14 on the front surface of the fan casing 9 in this order to the front portion of the fan casing 9. It is absorbed and returned to the rotary drum 4 again while being heated by the heater 16 through the communication duct 15. At the same time, the air outside the outer case 1 is introduced into the fan casing 9 through the intake hole 17 in the central portion of the rear surface of the outer case 1.
Inhaled into the rear part of the fan 10 as described above.
After exchanging heat with the air on the side of the rotating drum 4 flowing on the front side, the air is discharged from the exhaust hole 18 in the outer peripheral portion of the back surface of the outer box 1. 19
Is an electrode for detecting the degree of dryness, which is arranged on the annular support 6 so as to face the inside of the rotary drum 4. This electrode, which will be described later, is connected with the degree of dryness detection means 34 by the degree of dryness signal output circuit 33. I am configuring. Reference numeral 20 denotes a thermistor, which is arranged in the vent hole 14 portion of the fan casing 9 and detects the temperature of exhaust gas from the rotary drum 4. Reference numeral 21 denotes a circuit board provided in the upper part of the outer box 1, on which various electronic circuits shown in FIG. 1 are mounted. Specifically, the motor 11 and the heater 16 are provided.
Electronic circuits such as a drive circuit 22 for driving the motor, a microcomputer 23 as a drying operation control device, and a clock pulse generation circuit 24 for applying a clock pulse to the microcomputer 23 are mounted. The reference numeral 25 shown in FIG. 2 is an operation panel provided on the upper front surface of the outer box 1.
As shown in the figure, a display 26 composed of a 3-digit 7-segment type light emitting diode is provided, and a course selection switch 27, a start switch 28, a power switch 29, a course display light emitting diode 30, 31 and 32 are arranged as shown. The course selection switch 27 selects one of the “standard” course, the “intensive” course, and the “ironing” course for the dry operation controlled by the microcomputer 23 according to the number of times of operation thereof. , 31 and 32 are for "standard" course display, "intensive" course display, and "ironing" course display, respectively. Reference numeral 33 shown in FIG. 1 denotes a dryness signal output circuit, which constitutes a dryness detecting means 34 together with the above-mentioned electrode 19. This dryness signal output circuit 33 is specifically the fourth
As shown in the figure, the detection voltage generating circuit 35 including the electrode 19,
The operational amplifier 36, the diode 37, the capacitor 38 and the resistor 39 are connected as shown in the figure, and the instantaneous voltage output from the detection voltage generating circuit 35 is smoothed and the dryness signal is output from the output terminal 34a as the dryness detection value Sk. Then microcomputer
Give to 23. Here, the microcomputer 23 sets a predetermined reference value K ₁ and a prediction reference value K ₀ as a detection reference value for the dryness detection value Sk according to each course in its memory, and a “standard” course and The predetermined reference value K ₁ in the "intense" course is a detection reference value for detecting the dryness of 95%, and the prediction reference value K ₀ is set to have a certain level difference from the predetermined reference value K _1. However, for example, it is set as a detection reference value for detecting a dryness of 85% having a level difference of 10% from the dryness of 95%. here,
The predetermined standard value K ₁ in the “standard” course and the “intelligent” course is the dryness “95%” as described above, but the predetermined standard value K ₁ in the “ironing” course is a slightly lower dryness “85”. %, The predetermined reference value K ₁ of the “ironing” course is used in this embodiment to predict the standard values of the “standard” course and the “intensive” course.
K ₀ . The predictive reference value K ₀ in the “ironing” course is set to a constant level difference with respect to the predetermined reference value K _{1 in the} “ironing” course. Further, the microcomputer 23 detects the drying load condition of the material to be dried (the amount of the material to be dried and the water content are regarded as the drying load) based on the degree of change in the temperature detection value given from the thermistor 20. The temperature detection value from the thermistor 20 (exhaust temperature from the rotary drum 4)
When the degree of change in rising is small, it is detected that the dry load status of the dried object is large, and when the degree of change is large, it is detected that the dry load status of the dried object is small.

Then, the microcomputer 23 controls the display 26, the motor 11 and the heater 16 as follows based on the detection result of the drying load condition of the material to be dried and the dryness detection value Sk provided from the dryness detecting means 34. The driving control is performed in the following manner, which will be described with reference to FIG. In FIG. 6, the display mode on the display 26 is shown according to the elapsed time of the drying operation.

If, for example, the "standard" course is selected as the course for the dry operation and the start switch 28 is turned on, the motor 11
And the heater 16 is driven to start the drying operation. The time point at which the operation starts is time T ₁ (see FIGS. 5 and 6). At this time T ₁ , the display 26 causes the light emitting diodes located in the middle position of each digit to blink in order from the left one. Then, the drying load status of the material to be dried is detected according to the degree of change in the temperature detection value given from the thermistor 20 in the period ta from the time T ₁ to the predetermined time, for example, the time T ₂ . Then, the remaining time required for the drying operation is predicted according to the detection result. This remaining required time prediction value N is “120”
If it is minutes, the remaining required time prediction value N
While counts down sequentially example in "10" in minutes from T ₂ to be displayed sequentially display 26 at numerical display mode. At the same time, at this time T ₂ , the dryness detection value Sk is applied to the microcomputer 23 from the dryness detection means 34 at a voltage level. In this case, since the moisture contained in the material to be dried decreases as the drying operation progresses, the dryness detection value Sk changes so as to decrease as a whole as shown in FIG. Then, at time T _3, this dryness detection value Sk
When reaches the prediction reference value K ₀ , a dryness of 85% is detected. Based on this detection, the estimated remaining required time value is displayed on the display unit 26 in the peculiar display mode mainly for numerical display. That is, in this case, as shown in FIG. 6, the expected remaining time value "50" minutes at this time is displayed numerically, and the light emitting diode of each segment indicating the numeral "50" blinks. Therefore, the dryness detection value Sk is the predictive reference value K _0.
Reaches a predetermined reference value K ₁ from the time it reaches the (time T ₄₎ period and a display adjustment period tc the up, as described above in the display adjustment period tc, the remaining required time predicted value and numerical display thereof The display unit 26 is displayed in the peculiar display mode consisting of blinking display of the numbers themselves. And this display adjustment period tc
Will inform that the display content will soon be displayed as the remaining required time fixed value display. After that, when the dryness detection value Sk reaches a predetermined reference value K ₁ at time T ₄ , 95% of the dryness is detected, and based on this, the remaining required time is a fixed value (in this case, the remaining required time “20”). Minutes).
Then, this remaining required time fixed value is sequentially down-counted, for example, in units of 1 minute, and is sequentially displayed on the display 26 in the numerical display mode. After this, the remaining required time fixed value is "0"
When the time comes, the motor 11 and the heater 16 are cut off and the drying operation is finished. Here, since the prediction reference value K ₀ for determining the start time of the display adjustment period tc is a constant level difference from the predetermined reference value K ₁ , the dryness detection value Sk becomes the prediction reference value K ₀ . The display adjustment period tc, which is the time from when it reaches the predetermined reference value K ₁ to it, becomes substantially constant. Therefore, when the dryness of 85% is detected by the prediction reference value K ₀ , it is predicted that the remaining required time will be set to the definite value soon with the predetermined reference value K ₁ .

As described above, according to the present embodiment, in the display adjustment period tc, since the display device 26 is displayed in the peculiar display mode such as the numerical display and the blinking display of the number itself, the display in the display adjustment period tc, It is possible to inform that the display is an adjustment display between the remaining required time predicted value display period tb and the remaining required time fixed value display period td, and it is possible to continue to inform the progress of time. Further, since the display unit 26 continues the display operation even during the display adjustment period tc, unlike the case where the display unit 26 does not display any time, the display unit 26 will not be erroneously recognized as a failure. Moreover,
During this display adjustment period tc, the dryness detection value Sk is the prediction reference value K _0.
Since it is determined by the time from reaching the predetermined reference value K ₁ to the predetermined reference value K ₁ , this display adjustment period tc will be preceded by a fixed time in time from the time when the remaining required time is fixed, and thus this display It is possible to eliminate the problem that the adjustment period tc is too long, or the remaining required time is fixed without the display adjustment period tc.

The present invention is not limited to the above embodiment, but may be modified as follows.

Regarding the detection of the dryness, the dryness may be detected not by using the electrode 19 to detect the resistance change of the material to be dried but by detecting the change of the exhaust temperature based on the thermistor 20, for example. Further, the detection of the drying load condition at the beginning of the drying operation may be performed not by detecting the exhaust temperature of the thermistor 20 but by detecting the resistance of the material to be dried by the electrode 19.

Further, the display mode of the display 26 may be changed as follows in addition to the display mode shown in the above embodiment.

(A) The remaining required time prediction value is set to a display mode by numerically displaying and blinking the number itself slowly, and the display mode in the display adjustment period tc is a peculiar display mode in which the numerical display and the number itself are blinked quickly. The display of the remaining required time fixed value may be a display mode in which numerical values are displayed without blinking.

(B) Remaining required time The predicted value display shall be a display mode with non-blinking numerical display, and the display mode during the display adjustment period shall be a unique display mode in which the numerical display and the number itself are blinked slowly The fixed value display may be a display mode in which the numerical value display and the numerical value itself flashes quickly.

(C) As shown in FIG. 7 shown as the second embodiment of the present invention, the display mode in the display adjustment period tc is the number display and the peculiarity of the fact that the digital point Dp of the display unit 26 is turned on or blinks. The display mode may be used.

(D) As shown in FIG. 8 shown as the third embodiment of the present invention, the display mode in the display adjustment period tc is a numerical display and a display other than the display 26, for example, the light emitting diode 30 to 30 for the course selection display. A peculiar display mode including a blinking display in which any one of 32 is blinked may be used. In this case, another indicator may be provided in place of the light emitting diode for displaying the course selection and may be turned on or blinked.

Besides, the present invention is not limited to the embodiments described above and shown in the drawings, and various modifications can be made without departing from the scope of the invention.

[Effects of the Invention] As is apparent from the above description, the present invention provides a prediction criterion set by the drying operation control device at a constant level difference with respect to a predetermined criterion value for the degree of dryness for determining the remaining required time. The value is used to detect the dryness in advance, and the time from when the dryness reaches this predictive reference value to when it reaches the predetermined reference value is set as the display adjustment period before the remaining required time fixed value display period. In the adjustment period, the remaining time estimated value is displayed in the peculiar display mode mainly for numerical display, so it is possible to eliminate the false recognition of the failure of the display unit and to make the adjustment display period almost constant. , It is possible to eliminate the problem that the display adjustment period is too long or omitted, and it is easy to judge the overall progress status, and the remaining required time prediction value is displayed numerically even during the display adjustment period. Therefore, it is possible to make a timely judgment of the progress status, and as a whole, an excellent effect that the progress status of the drying operation can always be judged favorably is achieved.

[Brief description of drawings]

1 to 6 show a first embodiment of the present invention.
FIG. 2 is a block diagram, FIG. 2 is a vertical side view of the entire dryer, FIG. 3 is an enlarged front view of an operation panel portion, FIG. 4 is a circuit diagram of a dryness detecting means, and FIG. 5 is a dryness change characteristic. FIG. 6 is a time chart showing the display mode. And the seventh
FIG. 8 and FIG. 8 are diagrams corresponding to FIG. 6 showing the second and third embodiments of the present invention, respectively. In the figure, 11 is a motor, 16 is a heater, 19 is an electrode, 20 is a thermistor, 23 is a microcomputer (drying operation control device), and 26 is an indicator.

Claims (1)

[Claims] 1. A drying operation control device is provided, and an indicator that is driven by the drying operation control device and displays a display related to the drying operation is provided.
At the beginning of the drying operation, the drying load condition of the dried object is detected to predict the remaining required time of the drying operation, and the estimated remaining required time value is sequentially displayed on the display while counting down, and When the dryness is detected and when it reaches a predetermined reference value, the remaining required time of the drying operation is set as a fixed value, and the remaining required time fixed value is down-counted and sequentially displayed on the display. There, the drying operation control device detects the dryness of the material to be dried at a predictive reference value set at a constant level difference with respect to the predetermined reference value, and the predetermined value from the time when the predictive reference value is reached. The display adjustment period is set until the reference value is reached, and during this display adjustment period, the remaining required time estimated value is displayed on the display in a peculiar display mode mainly for numerical display.燥機.