JPH0790084B2 - Coin operated clothes dryer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a coin-type clothes dryer that sets an operating time in accordance with a coin inserted.

(B) Prior Art As for coin-type clothes dryers, as disclosed in, for example, Japanese Patent Publication No. 60-25154, the time of the heating and drying process is determined by the number of coins inserted, regardless of the load. Heat dry until the end of the time. Therefore, for example, Japanese Patent Laid-Open No. 58-58
As shown in Japanese Patent Publication No. -10000, it was thought that the heating and drying could be ended by the number of intermittent operations of the temperature control motor to reduce waste, but the drum rotation would be stopped even though there was time left for coin insertion. And, it is likely to cause a dribble such as a user requesting a refund. Moreover, since the material to be dried is hot at the end of the above-mentioned heating and drying, it is difficult to take it out, and if it is left to cool as it is, wrinkles are formed.

(C) Problems to be Solved by the Invention The present invention makes it easier to take out the material to be dried by executing the cooling down step after executing the heating and drying step during the operating time.
During the remaining operation time, drum reversal is performed to maintain a temporary work state, thereby eliminating the cause of trouble and preventing wrinkles from being left unattended.

(D) Means for Solving the Problems The coin-type clothes dryer according to the present invention has a rotating drum for containing an object to be dried, a heater and a fan for supplying dry air to the rotating drum, and a coin to be inserted. The time of the operation including the heating and drying process and the cool down process set by the subtraction timer by starting the operation, the heating and drying control unit for controlling the heating and drying process according to the load amount during the operation, and the above, During operation, the cool-down control unit that controls the cool-down process after the heating and drying process, and after the cool-down process, stops the heater and fan until the remaining time of the timer expires and the operation ends. In this state, a drum rotation control unit that rotates the rotary drum is provided.

(E) Action That is, while the total operating time is determined by inserting coins, if the time of the heating and drying process elapses according to the load, the cool down process is continuously executed, and at this end time When the remaining time is left, only the drum is reversely driven during this remaining time, and it is visually indicated that the work is being performed while preventing the wrinkles of the material to be dried that has cooled.

(F) Example Hereinafter, an example in which the entire operation of a gas type clothes dryer having a rated capacity of 10 kg, which is frequently used in a coin laundry, is controlled by a microcomputer (hereinafter, referred to as a microcomputer) will be described with reference to the drawings.

In FIG. 3 and FIG. 4, (1) is a body of a clothes dryer which is used alone or in a plural number, and a direct ignition type gas burner (2) and a combustion chamber (3) are provided above the machine body. )
A (heater) is installed, a horizontal shaft type rotary drum (4) is installed in the lower middle stage, and a horizontal filter (5) and an exhaust fan (6) are installed in the lower part. The airframe (1) is provided with an air supply port (7) for supplying combustion air from the lateral direction to the gas burner (2) in the upper part, and an exhaust pipe (8) is projectingly provided in the lower back surface, An operation panel (10) incorporating a microcomputer (9), other electronic control systems, various switches, a coin slot and a display is provided on the front surface.

The fan (6) is driven by a fan motor (11), sucks combustion air from an air supply port (7) and supplies it to a gas burner (2), and the generated dry air is generated by a rotating drum (4) and a filter. It is made to flow down in the order of (5) and discharged from the exhaust pipe (8). The exhaust pipe (8) is connected to, for example, a common duct (12), the length of the exhaust passage is regulated within 20 m, and the air volume by the fan (6) is 10.5 m ³ / min to 17 m ³ / m.
The range is in.

The rotary drum (4) is reversely driven at a low speed by the drum motor (13). Further, a door (14) for opening and closing the rotary drum (4) and the clothes entrance and exit of the machine body (1) is provided on the front surface of the machine body (1), and the opening and closing can be detected by a door switch (15). is there.

A temperature control thermostat (16) (temperature detecting means) for detecting the temperature of the dry air is provided between the rotary drum (4) and the filter (5). In addition, an overheat prevention thermostat (A) (17) is provided on the side of the combustion chamber (3), and an overheat prevention thermostat (B) (1) is provided on the upper side.
8) are provided respectively, and the thermos (B) (18) usually do not work because the flame of the gas burner (2) slightly tilts due to the air flow, but it works when the air flow rate decreases and the flame comes up. Is done.

Next, referring to the control block diagram of FIG. 1, the microcomputer (9) includes a power supply circuit (19), a clock oscillation circuit (20), a reset circuit (21), a power failure detection circuit (22), and a power failure circuit. Backup detection circuit for memory retention (23)
From the load drive circuit (24), 7-segment numeric display tube and LED (25). Further, the microcomputer (9) controls the operation in the present embodiment by a coin switch circuit (26) operated by inserted coins (coins, cards, etc.), a door switch (15), and a manual reset. A plurality of dip switches (28), by which the owner can manually select the switch (27), the automatic control operation in the present embodiment, the heating and drying operation for a time corresponding to the number of inserted coins as in the conventional case, etc. Input from the thermo (B) (18) provided on the circuit board), and the ignition information of the gas burner (2) and the power supply information that the temperature control thermo (16) is intermittent.

The load drive circuit (24) is connected with a fan motor (11), a drum motor (13), a drive indicator light (29), a buzzer (30), and an integrator (31) for counting the total number of coins inserted. In addition, the gas ignition device (32) is connected via the temperature control thermostat (16).
In addition to this, a gas valve (3
3) is connected.

The ignition information indicates that the gas igniter (32) is supplying gas to the gas burner (2), that is, the gas valve (33).
It is configured based on the open.

Next, the gas type clothes dryer of this embodiment is heated and dried-cool down-drum reversal-soft wrinkle (wrinkle prevention).
The operation in which the operation is advanced in the order of each step and the control by the microcomputer (9) will be described with reference to the flowcharts of FIGS. 1 and 2 (a) and (b). Main controller (34) is ROM
The control signal is output to each control unit based on the stored data of (35) and various input signals, and the initial state is determined after the power is turned on. When judged by the signal of, RAM (36)
After clearing the stored data of, the exhaust processing flag is first set, the operating time according to the number of inserted coins is set in the operating time timer (37), and the display controller (38) displays the indicator (25).
Display digitally with.

The main control unit (34) displays the remaining time on the display unit (25) every one minute, and if there is an operating time and the temperature adjustment coincidence flag is not set before the cool down stroke, the exhaust treatment flag is determined. (See figure). Then, here, the exhaust treatment control unit (39) controls the load drive circuit (24) to move the fan motor (1
The drive signal is output to 1) and so-called pre-purge is executed. This exhaust time is measured by the exhaust time timer (40) for about 15 seconds, and since the temperature control thermostat (16) is turned on, the exhaust treatment flag is turned off after this and heating and drying by hot air is started. This heating / drying is that the heating / drying control section (41) ignites and burns the gas burner (2), inverts the drum (4), and drives the fan (6).

Thus, the main controller (34) turns off the temperature control thermostat (16) every time the temperature of the dry air after passing through the drum (4) reaches 70 ° C.
However, the number of times the gas burner (2) is stopped, that is, the number of interruptions is counted by the interruption counter (42), and each time it is counted, one of the dip switches (28) ... Is set freely and stored in advance. Compare and judge with a certain reference number. In the present embodiment, the reference number of times is preferably 6 times in spring and autumn, 5 times in summer, and 7 times in winter, but as described above, the owner can freely set between 1 and 15. .

Thus, set the exhaust treatment flag each time until they match,
The gas burner (2) is combusted intermittently with ON / OFF of the temperature control thermostat (16), and heating and drying at about 70 ° C. proceed. When the content of the intermittent frequency counter (42) and the reference frequency coincide with each other, the main control unit (34) sets a temperature control coincidence flag and an exhaust treatment flag by the coincidence signal, and sets a predetermined time timer, in the embodiment, a 5-minute timer. The time is controlled by (43). The fact that the temperature adjustment coincidence flag is set and the time reaches the 5-minute time control range can be known by the short-term intermittent operation of the buzzer (30) by the buzzer control section (44), and the display (2
It can be known by blinking the digital display of 5) at a slow timing. The drying rate at this time is about 88% at the rated load and about 97% at a small load of about 2.5 kg, and a load of about 5 kg or less may be taken out at this point.

In this way, the temperature control thermostat (16) is intermittent even during the time control for 5 minutes, heating and drying progresses, and at the time of 5 minutes elapses, intermittently about 2 times under a small load, the drying rate reaches 100%, At the rated load, the drying rate reaches about 93% intermittently about three times.

Due to the time-up of the 5-minute timer (43), the main control unit (34) which has received the timer output turns off the temperature adjustment coincidence flag and sets the cooldown flag (stroke flag) to shift to the cooldown stroke. Display "CD" instead of the remaining time on the display (25). What is this cooldown?
The cool down control section (45) stops combustion of the gas burner (2) and drives the drum (4) and the fan (6).

After the cool-down process is completed, the drum reversal control unit (4
6) Replace the stroke flag called drum reversal that also stops the drive of the fan motor (11), and run time timer (37)
Continues the drum reversal process until the time is up. This drum reversing process is to move the still-to-be-dried material and to prevent wrinkles even if it is normally cool down.
Normally, it is not particularly necessary, and about 5 minutes is sufficient at most, but by continuing this without stopping for the rest of the operation, the user can drive according to the number of coins inserted. Is demonstrated.

However, the main control section (34) restores the remaining time table on the digital display (25) in this drum reversing process, and at the same time, adds a colon display to teach that heating and drying can be performed during the remaining time.

When the time secured with the inserted coin has passed, the main control unit (34) operates the buzzer (30) so as to respond to “end”, sets the soft wrinkle flag, and displays the time zero and the soft wrinkle is displayed. Run the process for up to 2 hours. The soft wrinkle is to rotate the drum every 10 minutes for 10 seconds in order to prevent the soft wrinkle controller (47) from wrinkling until the object to be dried is taken out. The owner can eliminate the soft wrinkle stroke by operating one of the dip switches (28).

The above work description is for a normal case in which a time sufficient for the drum reversing process is secured by inserting coins, but when the number of coins inserted is small, the flowchart of FIG. ). First, when the time has passed during the cool down process, the cool down process is completely performed and then the soft wrinkle is started. Next, when the time becomes zero in the time control range of the 5-minute timer (43), the cool down process is immediately started (see the figure), and then the soft wrinkle is automatically started. The same is true when the temperature control thermostat (16) reaches zero time during the heating and drying process that continues even once. But,
When the temperature control thermostat (16) is not intermittent, that is, when it reaches zero time without raising the temperature to about 70 ° C (when the number of coins inserted is small,
When the load is large), there is no need to cool down, so shift to the soft wrinkle immediately (see the figure). During this time, the display (25) indicates time zero, and the buzzer (30) operates at time zero.

If it is determined that the number of coins inserted is small, the user will insert additional coins. The main control section (34) processes the additional input signal from the coin switch circuit (26) by determining whether the operating time is in the zero state. If it is zero, it is as described above, but if it is already in operation (with time), the process is changed depending on which stroke it is. That is, if the cooldown process or the drum reversing process is in progress, other data except the extension data of the operation time due to the additional coin insertion is cleared, the exhaust treatment flag is set, and the new operation time based on the extension data is operated. Reset the time timer (37). Therefore, the main controller (34) restarts the operation from the heating and drying process. On the other hand, if it is in the heating and drying process, the new operation time based on the extension data is reset in the operation time timer (37), and the temperature adjustment coincidence flag and the intermittent frequency counter are cleared. Therefore, in this case, the main control section (34) causes the heating and drying operation to be executed for a long time (see FIG. 2 (A)). The former corresponds to the case where the material to be dried can be replaced, and the latter corresponds to the case where the material to be dried is additionally charged during operation, and in both cases, the door (14) is opened once.

Such opening of the door (14) may be performed during the process in order to check the drying condition of the material to be dried. In this case, the main control section (34) stops all output by the door opening / closing control section (48) in response to the input of the operation signal of the door switch (15), and the intermittent frequency counter (42), temperature control coincidence flag and drum The inversion flag is cleared and the exhaust treatment flag is set. This is because in the heating and drying process, in order to compensate for the temperature drop in the drum (4) due to the opening of the door (14), the heating and drying process is restarted from the beginning, and in the drum reversing process, the finished product is taken out and only the remaining time remains. This means that heating and drying are started from the beginning in order to dry another material to be dried (see the figure). However, if the door (14) is opened at the time of the cool down process, the remaining cool down process is continued at the time of re-closing unless additional coins are inserted at the same time.

(G) Effect of the Invention According to the present invention, it is possible to provide a service to the user in terms of easiness of taking out the material to be dried, and by rotating the drum for the remaining operation time, the user can work It is possible to eliminate the cause of trouble with the owner by indicating that it is in the middle, and to prevent wrinkles of the material to be dried. Therefore, it is possible to provide a coin-type clothes dryer that is easy for the user to use and easy for the owner to manage.

[Brief description of drawings]

FIG. 1 is a control block diagram of the dryer according to the present invention, FIGS. 2 (a) and (b) are flow charts for explaining the operation, and FIG.
The drawing is a front sectional view, and FIG. 4 is a side sectional view. (2) ... Gas burner (heater), (4) ... Rotating drum, (6) ... Fan, (9) ... Microcomputer, (16) ...
… Temperature control thermostat (temperature detection means), (26) …… Coin switch circuit, (34) …… Main control unit, (37) …… Operating time timer, (41) …… Heating and drying control unit, (42) ...... Interruption counter (CNT), (43) ...... Predetermined time (5 minutes) timer, (45) ...... Cooldown controller, (46) ...... Drum inversion controller.

Claims (1)

[Claims] 1. A rotary drum for containing an object to be dried, a heater and a fan for supplying dry air to the rotary drum, and an operation including a heating / drying step and a cooldown step, which are set according to a coin to be inserted. A timer that subtracts the time by starting operation, a heating and drying control unit that controls the heating and drying process according to the load amount during the operation, and a cooldown process after the heating and drying process during the operation. And a drum rotation control unit that rotates the rotary drum with the heater and fan stopped until the remaining time of the timer runs out and the operation ends after the cooldown stroke is completed. A coin-type clothes dryer, which is provided with.