JPH05184792A - Method for judging end of drying of drying machine and apparatus therefor - Google Patents

Abstract

PURPOSE:To achieve higher accuracy in the judgment of the end of drying by determining a moisture reference value based on a detected moisture, when the temperature of an exhaust or the like reaches a specified value, so that the degree of heating a supply air is as specified, and by deciding the end of drying when the value coincides with the detected moisture. CONSTITUTION:In a drying machine in which air heated with a heater 31 such as gas burner is supplied into a rotary drum 10 at an air supply port 30 via an air duct 4 and an exhaust after the drying is discharged with an exhaust cylinder 12, a clothes temperature sensor S1 or an exhaust temperature sensor S2 and an exhaust moisture sensor S3 are arranged. With a heating controller, at the start of drying, the degree of heating with the heater 31 is set as specified and after the drying, a heating power of the heater 31 is weakened when the detected temperature reaches a specified value. Then, when the detected moisture reaches a specified value while the set degree of heating reaches a specified value, a value of moisture subtracted by a specified value from the detected moisture is defined as reference value and then, the detected moisture is compared with the reference value. When the both coincide, the drying is ended.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drier for clothes and the like, and more particularly, to contain a material to be dried in a rotary drum, and to supply hot air to the rotary drum and to exhaust it from the material to be dried. The present invention relates to a method and an apparatus for determining the end of drying by detecting the end of drying by detecting the humidity of the exhaust gas in a dryer of the type for drying.

[0002]

2. Description of the Related Art There is a type of dryer for drying clothes, etc., in which hot air is fed into a rotary drum and dried by the hot air. As shown in FIG. 1, the rotary drum (10) is placed inside a casing (1). This is a rotating drum
The (10) is rotatably supported by the rear wall (11) of the casing (1) or a mounting plate (18) connected to the casing (1), and the peripheral edge of the front opening of the rotating drum (10) is supported by this. The rotating drum (1) is also supported by a mating support ring (3).
Both front and rear ends of (0) are rotatably supported.

An intake fan (F) is installed at the center of rotation of the rear wall (11), and a hot air supply port (30) is provided in the support ring (3) to provide the intake fan (F). The exhaust pipe (12) for exhausting the exhaust gas from (1) is connected in series, and the central opening of the support ring (3) is closed by the opening / closing lid (13) supported by the casing (1). In this type of dryer, the rotary drum (10) is rotationally driven by a motor (15), and heated air from a heating device (31) arranged upstream of the hot air supply port (30) is rotated by the rotary drum. (10) is configured so that the opening / closing lid (13) is opened, the material to be dried (M) such as clothes is put in, and the opening / closing lid (13) is closed. When the heating device (31) and the motor (15) are in the operating state, the material to be dried (M) in the rotary drum (10) is dried by the heated air while being rotated.

Further, in this conventional device, an exhaust temperature sensor (S ₂ ) is provided in the exhaust stack (12) and a humidity sensor (S ₃ ) is provided.
Is provided, and the temperature inside the rotating drum (10) is maintained at the set temperature by the temperature detected by the exhaust temperature sensor (S ₂ ).
When the detection output (E) of the humidity sensor (S ₃ ) reaches the reference value (E ₀ ),
It is determined that the drying is completed, and the heating operation is stopped. Therefore, when the material to be dried (M) is put into the rotary drum (10) and the dryer is put into an operating state, the work until the drying of the material to be dried (M) is completed can be automated.

However, with this conventional device, the accuracy of the determination of the end of drying is insufficient. When the drying process progresses, the detection output (E) of the humidity sensor (S ₃ ) usually changes as shown in FIG. That is, the detection output (E) decreases as the degree of dryness advances, and the reference value (E ₀ ) is located in the downward slope of this figure. On the other hand, the detection output of the humidity sensor (S ₃ ) has a certain range of variation in the output level, as indicated by the broken line and the imaginary line in the figure. Therefore, when it is determined that the time when the reference value (E ₀ ) reaches the reference value (E ₀ ) in the middle of the change of the down slope is the time when the drying is completed, the variation is expanded on the time axis of the figure. In other words, the accuracy of the determination at the time of completion of drying becomes insufficient.

The present invention has been made in view of the above-mentioned point. "The air supply into the rotary drum (10) is heated by the heating device (31), and the rotary drum (10) is rotated in one direction. The material to be dried (M) contained therein is heated and dried by the heating air supply, and the moist air in the rotary drum (10) is discharged from the exhaust pipe (12) communicating with the rotary drum (10), and exhausted. A dryer that outputs a drying end signal when the detection output of the humidity sensor (S ₃ ) that detects the humidity of the product reaches the reference value (E ₀ ).
In the above, it is an object to improve the accuracy of determination of the drying end time of the material to be dried (M).

[Invention of Claim 1]

[0008]

[Technical Means] The present invention is a supply air heating method for solving the above-mentioned problems, and a technical means for solving the above-mentioned problems is "the exhaust gas temperature or the clothing temperature reaches a predetermined temperature and a heating device. The value obtained by reducing the detection output (E ₁ ) of the humidity sensor (S ₃ ) when the heating of the supply air by (31) is at the predetermined heating degree is the reference value (E ₀ ), and the humidity sensor When the detection output (E) of (S ₃ ) matches the reference value (E ₀ ), it is judged that the drying is completed ”.

[0009]

The above technical means operates as follows. The material to be dried (M) in the rotary drum (10) is heated and dried by the supply air heated by the heating device (31), and the clothing temperature or exhaust temperature gradually rises as the drying process progresses.
At this time, the humidity of the exhaust gas is once in a substantially equilibrium state. After that, the clothing temperature or the exhaust temperature further rises, and conversely, the exhaust humidity decreases.

Therefore, based on the detection output (E ₁ ) of the humidity sensor (S ₃ ) when the exhaust gas temperature or the clothes temperature is a predetermined temperature and the supply air heating degree by the heating device (31) is the predetermined heating degree. Then, the value obtained by reducing the detection output (E ₁ ) by a predetermined degree is set as the reference value (E ₀ ), and the detection output (E) of the humidity sensor (S ₃ ) matches the reference value (E ₀ ). The time point corresponds to the tendency of the variation in the detection accuracy of the humidity sensor (S ₃ ) (the variation is corrected).

This will be described with reference to FIG.
Assuming that the detection output (E) of the humidity sensor (S ₃ ) varies within the range shown in the figure, the detection output (E ₁ ) passes with an upwardly displaced curve (LH) with respect to the actual humidity ( The detection output is (E ₁₁ )) when the reference value (E ₀₁ ) and the detection output (E ₁ ) elapse with a downwardly shifted curve (LL) with respect to the actual humidity (the detection output is (E
_The reference value (E ₀₂ ) of ₁₂ )) is only vertically shifted as shown in FIG. Therefore, when the reference value (E ₀ ) is detected based on the actual humidity curve, there is almost no time lag from the start of drying.

[0012]

EFFECT even if there are variations in detection accuracy of the humidity sensor (S _3), since the reference value (E ₀₎ is set based on the detection output (E _1), the completion of the drying based on the actual humidity change Since it is easy to agree with the case of the judgment, the accuracy of the judgment of completion of drying is improved. [Invention of Claim 2]

[0013]

The present invention provides the method of claim 1 as described above.
It is intended to be carried out and adopted for this
The technical means to do this is "Clothing temperature in the rotating drum (10)
Temperature sensor (S₀) And the rotating drum (10)
Humidity sensor (S₃) And start drying
Sometimes set the heating degree by the heating device (31) to a predetermined degree
After starting drying, the temperature sensor (S₀) Is the specified temperature
After that, reduce the heating power of the heating device (31)
The heating control device (60) and the temperature sensor (S₀) Detection temperature is
When the temperature reaches the specified temperature and the heating control device (60) heating setting degree
Humidity sensor (S₃) Detection output (E₁)
The value reduced by a predetermined degree ₀) As this
And humidity sensor (S₃) Comparing means for comparing the detection output (E)
And the reference value (E₀) And the above detection output (E) match
The output from the comparison means is used as a dry end signal.
That's it.

[0014]

[Operation / Effect] The temperature of clothes or the temperature of exhaust air in the rotary drum (10) is detected by the temperature sensor (S ₀ ), and the drying is started with the heating degree by the heating device (31) set to a predetermined degree. After that, after the temperature detected by the temperature sensor (S ₀ ) reaches a predetermined temperature by the heating control device (60), the heating device (3
The firepower of 1) is weakened. With the progress of the drying process, the clothing temperature or the exhaust gas temperature rises, while the humidity of the exhaust gas gradually decreases after reaching the equilibrium state. Detection output (E ₁ ) of the humidity sensor (S ₃ ) when the clothing temperature or exhaust temperature reaches a predetermined temperature and the heating setting degree of the heating control device (60) reaches a predetermined degree
As the reference value (E ₀ ) a value reduced by a predetermined degree than
This is compared with the detection output (E) of the humidity sensor (S ₃ ) by the comparison means, and the output from the comparison means when the reference value (E ₀ ) and the detection output (E) match is the dry end signal. It is said that.

As described above, the end of drying is automatically determined by the operation of each of the above parts, and the method according to the invention of claim 1 can be surely carried out.

[0016]

EXAMPLES Next, the construction of the whole dryer for carrying out the present invention will be described in detail with reference to FIGS. [Outline of overall structure] As shown in Fig. 3, the casing (1) has an open / close lid (13) at the center of the front face that closes the central opening of the support ring (3) (see Fig. 5) in a single-opening type. It was done,
One side of the opening / closing lid (13) is pivotally supported by the front surface of the casing (1) so as to be rotatable back and forth, and a grip (19) is arranged on the opposite side of the pivotal support.

In the casing (1), as shown in FIGS.
As shown in FIG. 1, the rotary drum (10), the intake fan (F), the motor (15) for rotating both of them, the rotary drum (1
Support ring (3) that fits in the front open part of (0) and supports the front part of the rotating drum (10), via the air supply duct (4) to the hot air supply port (30) of this support ring (3). Gas burner (31a) for supplying heated air, and the intake fan (F)
And an exhaust fan device (5) for exhausting air through the exhaust duct (51) outside the casing (1).

As shown in FIG. 5, the rotary drum (10) has a shaft portion (16) protruding from the center of its rear surface, which is attached to the mounting plate (1).
It is supported by the bearing part (11a) provided in 8), the front end is rotatably fitted to the outer periphery of the support ring (3) fixed to the casing (1), and is supported by this support ring (3). It is rotatably housed in the casing (1) in this manner. Then, the outer peripheral portion of the rotating drum (10) and the motor
The output shaft of (15) and the belt are driven. This allows
The rotary drum (10) is rotated by the operation of the motor (15). The internal structure of the rotary drum (10) is similar to that of a known one, and as shown in FIG. 6, chevron portions (17) (17) (17) (17) (17) )
There is a ridge, and the to-be-dried material (M) is rotated by the chevron portion (17). Further, even when the amount of the material to be dried (M) is small, it is lifted up by the rotation of the rotary drum (10) and then drops, and the above operation is repeated according to the rotation of the material to be dried (M).

Since the rotating drum (10) is driven to rotate by the motor (15), as shown in FIG.
The belt (19) wound around the body of (0) is transmitted to the output pulley (P) of the motor (15) in such a manner that tension is applied by the intermediary wheel. Also, as shown in the figure, the output pulley (P) is belt-transmitted with the pulley of the intake fan (F), and the rotary drum (10) and the intake fan (F) are driven by the common motor (15). Is driven to rotate by belt transmission.

[Hot Air Supply Structure] In this embodiment, as shown in FIG. 6, the heated air heated by the heating device (31) is supplied from the hot air supply port (30) provided in the lower right portion of the support ring (3). The heating device (31) is supplied to the rotary drum (10).
As shown in FIG. 4, the unit is composed of a pair of unit burners in which flame holes are continuous in the longitudinal direction, and the unit burners are housed in a burner box (32) opened upward. A nozzle body equipped with this burner box (32) and having a nozzle corresponding to each of the unit burners and a valve device (V) are connected by a pipe (G). Valve device
(V) and a hose end (33) serving as a gas inlet for the (V) are fixed to the auxiliary plate (34), and the hose end (33) projects to the outside of the auxiliary plate (34). The auxiliary plate (34),
It is a right-angled triangular plate and is set to a size that closes the triangular opening formed by the corner portion of the rear wall (11) and the rear ends of the bottom plate and side plate of the casing (1). Removable casing by screwing the casing (1)
Alternatively, it is attached and fixed to the rear wall (11).

The rear wall (11) has a flange portion over the entire periphery thereof, and a region surrounded by the flange portion is projected rearward. It is set to be larger than the protruding height of the auxiliary plate (34) from the auxiliary plate (34). Further, since the burner box (32) and the valve device (V) are connected and integrated by the pipe (G), they are inserted from the triangular opening at the rear corner of the casing (1). When the peripheral edge of the auxiliary plate (34) is brought into contact with a part of the rear end of the casing (1) and the corner portion of the rear wall (11) and screwed, the burner box (32) is moved to the casing.
It will be provisionally positioned at the predetermined position in (1).

In this embodiment, the position of the heating device (31) inserted as described above is changed as shown in FIG.
Inlet part of the air supply duct (4) connecting to the hot air supply port (30) of (3)
It is (41). As shown in FIG. 4, the air supply duct (4) includes a fan-shaped discharge chamber (42) disposed between the front surface of the casing (1) and the support ring (3), and the inlet and the inlet. Department
(41) and a connecting part (43) for connecting the (41)
The inlet portion (41) is extended rearward from the lower rear surface of 3), and the inlet portion (41) is fixed to the bottom surface of the casing (1) as shown in FIG.

The rear surface of the discharge chamber portion (42) has a support ring (3).
4, the rear surface of the discharge chamber portion (42) is formed with openings (40) (40) in a certain range from both ends of the fan shape as shown in FIG. 4, and these openings (40) It is closed during (40). Then, on the surface where the rear surfaces of the discharge chamber portion (42) are in contact with each other and coincide with the openings (40) and (40), there are formed open areas (30a) and (30b) in which a large number of small through holes are formed. This opening area functions as the hot air supply port (30) described above.

Therefore, in this embodiment, the air heated by the heating device (31) is supplied from the inlet part (41) through the connecting part (43) to the openings (40) (40) and the opening area (30a) (30). 30b) is discharged into the rotating drum (10), and the material to be dried (M) in the rotating drum (10)
Are heated by this hot air. In this drying step by heating, since the rotating drum (10) and the intake fan (F) are rotated by the motor (15), the material to be dried is
(M) is agitated and moved, and the combustion exhaust gas and heating air of the heating device (31) are supplied from the hot air supply port (30) via the air supply duct (4) by the suction force of the intake fan (F). It is forcibly supplied into the rotary drum (10).

In this embodiment, the rotating direction of the rotary drum (10) is set clockwise when viewed from the front. Under this condition, the opening range of the hot air supply port (30) is shown in FIG. Is set in the lower right 90 ° range (the range from the right of the center of the rotating drum (10) to just below), and the opening areas (30a) (30b)
Each opening range is set in an arcuate section having an included angle of about 35 degrees. Therefore, the included angle of the non-opening portion sandwiched between these sections is about 20 degrees.

As a result, the heating device (31) is rotated to the rotary drum.
Since the closest part of the hot air path to (10) is an open area, the hot air generated at the inlet (41) is
a) It will be evenly distributed in (30b). In other words,
No hot air port to the rotary drum (10) is formed at a location corresponding to the highest generated hot air, and the hot air temperature from the hot air supply port (30) is made uniform.

When the amount of the material to be dried (M) is small, the material to be dried (M) reaches the top of the locus of rotation of the chevron portion (17) by the rotation of the rotary drum (10), and then downwards as it is. However, even in the case of such movement of the material to be dried (M), hot air from the opening area (30a) is effectively supplied to this falling area. On the other hand, when the amount of the material to be dried (M) is large, the material to be dried (M) is circularly rotated while being in contact with the inner surface of the body of the rotary drum (10). When the dried matter (M) moves, it is once heated by hot air in the opening area (30b) and then reheated in the opening area (30a).

[Heating control method] In this embodiment, in order to detect the dry state of the material to be dried (M), a clothing temperature sensor (S ₁ ) for directly detecting the temperature of the material to be dried (S ₁ ) and an exhaust stack (12) An exhaust temperature sensor (S ₂ ) for detecting the temperature of the exhaust and a humidity sensor (S ₃ ) for detecting the humidity of the exhaust are provided, and the clothes temperature sensor
As shown in FIGS. 7 and 8, (S ₁ ) is attached to a portion of the inner surface of the support ring (3) exposed to the rotating drum (10) and has an opening area in the rotating direction of the rotating drum (10). It is arranged near the rear of (30a). And the clothing temperature sensor (S ₁ )
The detector directly contacts the object to be dried (M) that moves with the rotation of the rotating drum (10), and detects the temperature of the object to be dried (M) from the output under this contact condition.

The gas burner (31) as the heating device (31)
A control valve (65) for weakening the heating power of this gas burner (31a) with time is inserted in the gas circuit to (a). The control valve (65) controls the gas amount in the gas circuit to the maximum gas amount (8th
8 from the level) to the minimum gas amount (first level)
It has the function of adjusting in stages. Then, by changing the opening degree of the control valve (65) with time, a drying process suitable for the amount and characteristics of the material to be dried (M) is executed.

These controls are configured to be controlled by a microcomputer. In this embodiment, a control program based on the flowcharts shown in FIGS. 9 to 14 is executed. It should be noted that the inventors of the present invention have found that when there are many articles to be dried, the clothing temperature tends to appear relatively higher than the exhaust temperature, and when the amount of articles to be dried is small,
It was discovered that the opposite tendency to the above appears, and this control program automatically determines whether or not the amount (bulk) of the material to be dried (M) is large within a certain time after starting the drying process. According to the determination result, another control program is executed depending on the amount of the material to be dried (M). Hereinafter, a specific example of control will be described separately for each case.

FIG. 9 shows an outline of the control program. When the dryer is started, the air heated at the eighth level by the gas burner (31a) as the heating device (31) is supplied from the hot air supply port (30) through the air supply duct (4) to the rotating drum ( 1
The hot air supplied to the inside (0) and heating the material to be dried (M) is sucked and discharged to the exhaust pipe (12) by the intake fan (F) facing the rear surface of the rotary drum (10). During this time, the rotating drum (10)
The object to be dried (M) is stirred by the rotation of
Moisture in (M) evaporates and the moist air reaches the exhaust stack (12), but when the set time (T ₃ ) has elapsed after the dryer was started, the clothes temperature sensor (S ₁ ) The relative relationship of the temperature detected by the temperature sensor (S ₂ ) becomes stable.

After the set time (T ₃ ) has elapsed, the judgment step
The output values of the clothes temperature sensor (S ₁ ) and the exhaust temperature sensor (S ₂ ) are compared at (D ₀ ), and the comparison result indicates that the first drying step (H ₁ ) and the second drying step (H ₂ ) I understand. The first drying step (H ₁ ) is
This is the drying process when there is a large amount of material to be dried (M).
The drying step (H ₂ ) is a drying step when the amount of the material to be dried (M) is small.

In any drying process, the gas burner
The heat power of (31a) is weakened in several stages, and the heat power is weakened when the temperature detected by the clothing temperature sensor (S ₁ ) or the exhaust temperature sensor (S ₂ ) reaches the set value for each set heat power. .. Gas burner (3 in the first drying step (H ₁ ) and the second drying step (H ₂ )
The thermal power of 1a) is gradually weakened from the maximum thermal power of the eighth level (the initial thermal power mentioned above) to the thermal power of the third level (the final thermal power). Therefore, by gradually changing the signal input to the control valve (65), the opening of the control valve (65) is changed, and the amount of gas supplied to the gas burner (31a) is gradually reduced. Has become.

In the first drying step (H ₁ ), the temperature detected by the clothing temperature sensor (S ₁ ) does not reach the set temperature (L ₁ ) = 67 ° C. or higher under the condition that the heating power of the 8th level is initially set. It is determined whether or not the temperature detected by the exhaust temperature sensor (S ₂ ) has exceeded the set temperature (L ₁ ) = 58 ° C. This determination step (D ₁ ) has the configuration shown in FIG. 10, and the comparison result between the temperature detected by the clothing temperature sensor (S ₁ ) and the set temperature (L ₁ ) = 67 ° C. is prioritized. That is, when the temperature detected by the clothes temperature sensor (S ₁ ) is higher than the set temperature (L ₁ ) = 67 ° C, the temperature detected by the exhaust temperature sensor (S ₂ ) and the set temperature (L ₁ ) = 58 ° C. Gas burner (31
Reduce the heat power of a) from 8th level to 7th level.
Further, the temperature detected by the clothes temperature sensor (S ₁ ) is the set temperature (L ₁ ) =
Even if the temperature is lower than 67 ° C, if the temperature detected by the exhaust temperature sensor (S ₂ ) is higher than the set temperature (L ₁ ) = 58 ° C, the heating power is similarly weakened.

After that, the heating power of the gas burner (31a) is gradually weakened, but at each set heating power, the set temperature (L ₂ ) = 65 ° C. or the set temperature (L ₃ ) = corresponding to the clothing temperature sensor (S ₁ ) = Either 67 ° C as the set temperature or the set temperature (L ₂ ) = 59 ° C or the set temperature (L ₃ ) = 65 ° C corresponding to the exhaust temperature sensor (S ₂ ) as the set temperature. Each judgment step similar to
(D ₁ ) is executed, and finally, when it is determined that the drying is completed, only the intake fan (F) is operated for a certain period of time to complete the drying process.

When the second drying step (H ₂ ) is selected, first,
Whether or not the temperature of the exhaust temperature sensor (S ₂ ) is rechecked with the above-mentioned 8th level thermal power and the detected temperature of this exhaust temperature sensor (S ₂ ) is the re-determination temperature (Q ₅ ) = 58 ° C If the output of the clothing temperature sensor (S ₁ ) is larger than the output of the exhaust temperature sensor (S ₂ ) after the determination of ( ₁ ) and the determination step (D ₀ ) are performed, the first drying process (H ₁ ) is performed. Be changed. This is the first decision step
With (D ₀ ) alone, the determination results will vary, so
This is to improve the determination accuracy.

After that, the determination step (D ₂ ) is executed, and the temperature detected by the exhaust temperature sensor (S ₂ ) is equal to or higher than the set temperature (L ₁ ) = 68 ° C., or the clothing temperature sensor (S ₁ ) Is the set temperature (L
₁ ) = 62 ℃ or more is compared. This determination step (D ₂ ) has the configuration shown in FIG. 11, and the comparison result between the temperature detected by the exhaust temperature sensor (S ₂ ) and the set temperature (L ₁ ) = 68 ° C. is prioritized. That is, when the temperature detected by the exhaust temperature sensor (S ₂ ) is higher than the set temperature (L ₁ ) = 68 ° C, the temperature detected by the clothing temperature sensor (S ₁ ) and the set temperature (L ₁ ) = 62 ° C. Reduce the firepower of the gas burner (31a) from the 8th level to the 7th level without making a comparison with. Even when the temperature detected by the exhaust temperature sensor (S ₂ ) is lower than the set temperature (L ₁ ) = 68 ° C, the detected temperature by the clothing temperature sensor (S ₁ ) becomes the set temperature (L ₁ ) = 62 ° C or higher. If it is, the fire power is weakened as well.

After that, the heating power of the gas burner (31a) is gradually weakened, but at each set heating power, a judgment step (D ₂ ) for comparing with the respective set temperature corresponding to the heating power is executed, and finally the drying is performed. When the end determination is made, only the intake fan (F) is operated for a certain period of time, and all steps are completed. [Drying end judgment] When the above drying process is executed, the set thermal power of the gas burner (31a), the detection temperature of the clothing temperature sensor (S ₁ ) and the detection output (E) of the humidity sensor (S ₃ ) are It changes as shown in 12.

At the end of drying, the gas burner (3
A humidity sensor at the time the heating power of 1a) is weakened from the seventh level to the sixth level (detection output of the detection output of the S ₃₎ (E ₁₎ stores the humidity sensor (S ₃₎ (E) Is the detection output (E ₁ )
When the square root value (called standard value (E ₀ )) of
Output a dry end signal. On the other hand, in this embodiment, the program based on the flowchart of FIG. 13 is executed after the heating power of the gas burner (31a) is weakened from the seventh level to the sixth level.
Temperature detected by exhaust temperature sensor (S ₂ ) at level of thermal power (L ₂₁ )
Is stored and the judgment step (D
₁ ) After the execution, it is judged whether the difference between the detected temperature (L ₃₁ ) of the exhaust temperature sensor (S ₂ ) is 3 ° C or more, within the range of 3 ° C to 1 ° C, or 1 ° C or less, and the change of the exhaust temperature Based on the degree, the set time of the timer (T ₅ ) is set to a predetermined value (5 minutes, 10 minutes, 15 minutes) for each, and the timer (T ₅ ) starts. After that, the second drying end signal is output when the set time of the timer (T ₅ ) has elapsed.

Judgment step (D₃) Then, the flow chart of FIG.
The flag is initially set to "0" as shown in
Humidity sensor (S₃) Detection output (E) and the above stored value
(E₁) Square root value (reference value (E₀)) Compared in step (81)
Be done. Then, the humidity sensor (S ₃) Detection output (E)
If it is at the quasi value, the timer (T_Five) Setting time has elapsed
It is determined in step (82) whether or not this set time has elapsed.
Sometimes the drying process is complete. Conversely, after the set time has passed
If not, it returns and this judgment step (D₃) To
Return to the step that issued the branch instruction. In any of the cases described below
The turn location is the same as in the above case.

When the detection output (E) does not reach the reference value (E ₀ ), it is judged again in step (83) whether or not the set time of the timer (T ₅ ) has passed, and this set time is set. If the time has not passed, the routine returns. If the set time has passed, the flag is set to "1" and the humidity sensor (S ₃ )
The detection output (E) and the reference value are compared in step (84), and if the detection output is not the reference value, the process returns, and conversely, if the detection output is the reference value, The timer starts for 1 minute, and the drying process ends when the set time elapses.

When the determination step (D ₃ ) is executed with the flag already set to "1", the steps (81) to (83) are not executed but the steps ( The program after 84) is executed. Therefore, when the second drying end signal based on the exhaust gas temperature sensor (S ₂ ) is output after the first drying end signal based on the humidity sensor (S ₃ ) is output, this second drying end signal is output. When the first drying end signal is output after the second drying end signal is output, the drying process is ended at the time when the first drying end signal is output, and drying is performed 1 minute after the first drying end signal is output. The process is finished.

The determination step (D ₃ ) is performed by the gas burner (31
When the judgment step (D ₁ ) is performed after the heat power of a) has been weakened to the fifth level, and the heat power of the gas burner (31a) is the fourth
During the 90 seconds after being weakened to the level, and also during the subsequent decision step (D ₁ ), the gas burner (3
It is executed after the fire power of 1a) is weakened to the third level.

In the above embodiments, the heating device (31) is used as a gas bar.
Although it has been designated as a heater (31a), it may be an electric heater.
Also, when determining the end of drying, in this embodiment, the gas
Burner (31a) firepower increased from 7th level to 6th level
Humidity sensor when weakened (S₃) Detection output (E ₁) Based
Reference value (E₀) And are set, the gas burner (31a)
Humidity sensor (S₃)
Intelligence output (E₁) Based on the above reference value (E₀) May be set.
The reference value (E₀) Is not always the detection output (E₁) Is the square root of
The detection output (E₁) To a predetermined level
The obtained value is obtained experimentally and this value is₀)
Good. Also, set temperature (L₁) Varies depending on the device configuration.
This is the point that the decision step (D₁) Fruit
The same can be said for each set temperature when performing.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a conventional example.

[Figure 2] Humidity change diagram in exhaust gas in this case

FIG. 3 is a front view of a dryer adopting the present invention.

FIG. 4 is an exploded perspective view of the dryer.

FIG. 5 is a cross-sectional plan view of this dryer.

FIG. 6 is a cutaway front view of essential parts.

FIG. 7 is an explanatory view of the arrangement position of the clothing temperature sensor (S ₁ ).

FIG. 8 is an explanatory view of the arrangement structure of the clothing temperature sensor (S ₁ ).

FIG. 9 is a schematic flowchart of a drying process.

FIG. 10 is an explanatory diagram of a judgment step (D ₁ ).

FIG. 11 is an explanatory diagram of a determination step (D ₂ ).

[Fig. 12] Explanatory drawing of changes in the thermal power of the gas burner until the end of drying, and changes in the outputs of the clothes temperature sensor (S ₁ ) and the humidity sensor (S ₃ ).

FIG. 13 is an explanatory view of main parts of a specific example of a flowchart including a determination step (D ₃ ) of completion of drying.

FIG. 14 is an explanatory view of a judgment step (D ₃ ) of completion of drying.

[Explanation of symbols]

(10) ・ ・ ・ Rotating drum (30) ・ ・ ・ Hot air supply port (31) ・ ・ ・ Heating device (M) ・ ・ ・ Drying object (12) ・ ・ ・ Exhaust stack (S ₁ ) ・ ・ ・ Clothes Temperature sensor (S ₂ ) ・ ・ ・ Exhaust temperature sensor

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshimi Tsujimoto 2-26 Fukuzumicho, Nakagawa-ku, Nagoya City Rinnai Corporation

Claims (2)

[Claims] 1. A heating device (3) for supplying air into the rotary drum (10).
The object to be dried (M) housed in the rotary drum (10) is heated and dried by the heating air supply while rotating the rotary drum (10) to one side, and the wet air in the rotary drum (10) is rotated by the rotary drum (10). The humidity sensor (S ₃ ) that detects the humidity of the exhaust gas is discharged from the exhaust stack (12) communicating with (10), and the detection output is the reference value (E
_When the exhaust temperature or clothing temperature reaches a predetermined temperature and the heating of the supply air by the heating device (31) is within a predetermined heating degree, a dryer that outputs a drying end signal when A value obtained by reducing the detection output (E ₁ ) of the humidity sensor (S ₃ ) by a predetermined degree is used as the reference value (E ₀ ), and the detection output (E) of the humidity sensor (S ₃ ) is the reference value (E _0). ), It is judged that the drying is completed, the drying completion judgment method of the dryer. 2. A heating device (3) for supplying air into the rotary drum (10).
The object to be dried (M) housed in the rotary drum (10) is heated and dried by the heating air supply while rotating the rotary drum (10) to one side, and the wet air in the rotary drum (10) is rotated by the rotary drum (10). The humidity sensor (S ₃ ) that detects the humidity of the exhaust gas is discharged from the exhaust stack (12) communicating with (10), and the detection output is the reference value (E
_In the dryer configured to determine that the drying is completed based on the time when the temperature reaches ₀ ), the temperature sensor (S ₀ ) that detects the temperature of the clothes or the exhaust temperature in the rotating drum (10) and the rotating drum (10) Humidity sensor (S ₃ ) that detects the humidity of the exhaust gas of the exhaust gas, and at the start of drying, the heating degree by the heating device (31) is set to a predetermined degree, and after the start of drying, the temperature detected by the temperature sensor (S ₀ ) becomes the predetermined temperature. After that, the heating control device (60) which controls the heating power of the heating device (31) to be weakened and the temperature detected by the temperature sensor (S ₀ ) become a predetermined temperature and the heating setting degree of the heating control device (60) is set. detection output of but the reference value a value obtained by reducing a predetermined degree than the detection output of the humidity sensor (S ₃₎ when reaches a predetermined degree (E ₁₎ which the humidity sensor (S ₃₎ as (E ₀₎ A comparison means for comparing (E),
A drying end judging device for a dryer, wherein an output from the comparing means when the reference value (E ₀ ) matches the detection output (E) is used as a drying end signal.