JPS63229099A - Drier - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention mainly relates to a clothes dryer that uses a heater such as a gas burner, a fan, a rotating drum, and a drying air temperature detecting means (such as a thermometer). .

(B) Prior Art An example of this type of clothes dryer is disclosed in Japanese Patent Laid-Open No. 10000/1983, in which a temperature detection means detects the end of the heating drying operation by the number of times the heater is turned on and off. are doing.

However, the conventional example does not take into consideration that the time required to reach the standard number of intermittent cycles changes depending on the amount of the material to be dried (load amount). That is, if the capacity is adjusted to the rated capacity, a small load will result in overheating, and in the opposite case, the drying will occur. Furthermore, when a combustor is used as a heater, the degree of dryness changes depending on the length of the exhaust path and other exhaust resistance.

(C) Problems to be Solved by the Invention The present invention takes into consideration the element of time when detecting the end based on the number of interruptions by the temperature detection means, thereby ensuring that the heating drying operation is ended at the right time. This is what I am trying to do.

(d) Means for solving the problem The solution according to the present invention includes a rotating drum that accommodates the material to be dried, a heater and a fan that supply drying air to the rotating drum, and a heater and a fan that keep the temperature of the drying air constant. a temperature detection means that detects that the temperature reaches the temperature and turns on and off the heating device; a counter that measures the number of times that the heating temperature has reached the temperature; This configuration includes a timer that measures a predetermined period of time from the arrival of the coincidence signal, and a control section that terminates the heating operation based on the output of this timer.

(E) The reference number of operations shall be the number of times in the non-drying stage (for example, about 88%) in the case of the rated load, and the specified time required to reach complete dryness in the case of a small load. The number of times at a stage (for example, about 92%).Then, in the case of a rated load, the degree of dryness reaches the finishing range (for example, 92% or more) by further drying for a predetermined time from the undried stage, and a small load In the case of quantity, the area of complete dryness is finally reached.In other words, fleas from anywhere from the rated load to the small load fall outside of the undried and overdry areas.

(f) Example: Below is a rated capacity of 10k, which is often used in coin laundry.
An example in which the entire operation of the gas clothes dryer (g) is controlled by a microcomputer (hereinafter referred to as microcomputer) will be explained based on the drawings.

In Fig. 3 and Fig. 4, (1) is the body of a clothes dryer that can be used alone or in parallel. )
(heater) is installed inside, a horizontal shaft type rotating drum (4) is installed in the middle stage below it, and a horizontal filter (4) is installed in the lower part.
5> and an exhaust fan (6) are installed inside. The fuselage (1) is provided with an air supply port (7) in the upper part that supplies combustion air from the side to the gas burner (2), and has an exhaust pipe (8) protruding from the back of the lower part. On the front is an operation panel (10) incorporating a microcomputer (9), other electronic control systems, various switches, a coin slot, and a display.

The fan (6) is driven by a fan motor (11), sucks in combustion air from the air supply port (7), supplies it to the gas burner (2), and sends the generated drying air to the rotating drum (4).
), the filter (5) and then discharged from the exhaust pipe (8). The exhaust pipe (8) is, for example, a shared duct (1
2), the length of the exhaust path is specified within 20m, and the fan (6>) is connected to
The range is 17m3/min.

The rotating drum (4) is driven in reverse at a low speed by a drum motor (13). Also, on the front of the aircraft (1),
A door switch (14) is provided to open and close the clothing entrance/exit of the rotating drum (4) and the fuselage (1).
5) so that it can be detected.

A temperature control thermostat (16) (1 stage temperature detection) is installed between the rotating drum (4) and the filter (5) to detect the temperature of the dry air. There is an overheating prevention thermometer (A) (17) on the top, and an overheating prevention thermometer (B
) (1g>), and thermometers (B) and (ts) normally do not operate because the flame of gas burner (2) is slightly tilted by the air flow, and when the air flow rate decreases and the flame starts to rise. It is now working.

Next, the microcomputer (9) will be explained based on the control block diagram of FIG.
2) and a backup detection circuit (23) for memory retention in the event of a power outage, and output to a load drive circuit (24) and a display device (25) such as a 7-segment numeric display tube or LED. Furthermore, in order to control the operation in this embodiment, the microcomputer (9) operates a coin switch circuit (26) activated by an inserted coin (coin, card, etc.), a door switch (15L), and a manual reset switch (15L). 27), whether the automatic control operation in this embodiment or the number of coins inserted (
Multiple DIP switches (28)... (provided on the circuit board) allow the owner to manually select whether to perform heating drying operation for a corresponding period of time, etc., input from the thermometer (B) (18), Then input the ignition information for the gas burner (2) and the power supply information for the temperature control thermostat (16).

The load drive circuit (24) includes a fan motor (11), a drum motor (13), a drive indicator light (29), and a buzzer (3).
0), a totalizer (31) that counts the total number of coins inserted is connected, and a gas igniter (32) is connected via a temperature control thermostat (16), and a thermostat (A) (17) is connected to this. A gas valve (33) is connected thereto.

The above ignition information indicates that the gas ignition device (32) is supplying gas to the gas burner (2), that is, the gas valve (3
3).

Next, the gas-type clothes dryer of this example performs heating drying, cooling down, drum reversal, and soft wrinkles (wrinkling prevention).
The operation progresses through each process and is controlled by the microcomputer (9), which will be explained based on the flowcharts of FIG. 1 and FIGS. 2(A) and 2(B). The main control section (34) is R
It outputs control signals to each control unit based on the data stored in the OM (35) and various input signals, and the initial state is determined after the power is turned on, but the coin switch circuit (26) Judging by the signal from
After clearing the data stored in the RAM (36), first set the exhaust treatment flag, set the operating time corresponding to the number of coins inserted in the operating time timer (37), and use the display control unit (38) to indicate the operating time on the display (25). Display digitally.

The main control unit (34) displays the remaining time on the display (25) every minute, and if there is operating time and the temperature control match flag is not set before the cool-down process, it determines the exhaust treatment flag. (See 0 in the figure). Then, the exhaust processing control section (39) causes the load drive circuit (24) to output a drive signal to the fan motor (11) to execute a so-called bripurge. This exhaust time can be measured for about 15 seconds by the exhaust time timer (40), and since the temperature control thermostat (16) is ON, the exhaust processing flag is then turned off and heating drying using hot air is started. This heat drying is performed by the heat drying control section (41) igniting and burning the gas burner (2), reversing the drum (4), and driving the fan (6).

The main control unit (34) controls the temperature control thermostat (16) every time the temperature of the dry air after passing through the drum (4) reaches 70°C.
) is 0FFt, the number of times the gas burner (2) is stopped, that is, the number of times the gas burner (2) is stopped, is counted by an intermittent number counter (42), and each time it is counted, the dip switch (28)
. . . is compared with a standard number of times that is freely set and stored in advance. In this embodiment, the standard number of times is preferably 6 times in spring and autumn, 5 times in summer, and 7 times in winter, but as mentioned above, the owner can freely set the number between 1 and 15. .

In this way, the exhaust treatment flag is set each time until a match is found.
Turn gas burner <2> to 0N-OFF of temperature control thermometer (16)
The mixture is intermittently burned at the same time as drying by heating at about 70°C. If the contents of the intermittent frequency counter (42) match the reference number of times, the main control section (34) sets a temperature control match flag and an exhaust processing flag based on this match signal, and sets a timer for a predetermined time, a 5-minute timer in the embodiment. (43). In this way, when the temperature control match flag is set and the time control range of 5 minutes has been reached, it is known by the short intermittent operation of the buzzer (30) by the buzzer control unit (44). You can know this by seeing the digital display on the display (25) flashing slowly.The drying rate at this time is approximately 88% at rated load and approximately 97% at a small load of about 2.5 kg. Therefore, a load of approximately 5 kg or less may be removed at this point.

In this way, even during the 5-minute time control, the temperature control thermostat (16)
The heating and drying progresses intermittently, and after 5 minutes, under a small load, the drying rate reaches 100% with two intermittent corridors, and with the rated load, the drying rate reaches 93% with three intermittent cycles. reach.

When the 5-minute timer (43) times up, the main control unit (34) that receives the timer output erases the temperature control match flag, sets a cool-down flag (stroke flag), moves to the cool-down stage, and displays the digital display. The device (25) displays "CD" instead of the remaining time. This cool down means that the cool down control unit (45) stops combustion of the gas burner (2), and the drum (4) and fan (6)
It is what drives the.

After the cool-down process is completed, the drum reversal control section (4
6), the drive of the fan motor (11) is also stopped by a stroke flag called drum reversal, and the operation time timer (3) is set.
7) Continue the drum reversal process until the time is up.

This drum reversal process normally moves the dry material that is still warm even after cooling down to prevent it from wrinkling, and is usually not particularly necessary and only takes about 5 minutes at most, but it can be done during operation. By continuing this operation without stopping during the remaining time, the user can demonstrate that the machine is operating according to the number of coins inserted.

However, during this drum reversal process, the main controller (34) reinstates the remaining time display on the digital display (25) and at the same time adds a colon display to inform that drying by heating is possible within the remaining time.

When the time secured by the input fin has elapsed, the main control unit (34) activates the buzzer (30) to correspond to "end", sets the soft wrinkle flag, displays time zero, and restarts the rough. 1 - Execute the wrinkle process for a maximum of 2 hours. This soft wrinkle is a soft wrinkle control unit (4
7) The drum is rotated for 10 seconds every minute to help prevent wrinkles from forming before the dried material is taken out. The owner has the above dip switch (28)...
The soft wrinkle process can be eliminated by manipulating one of the following.

The above work description is for the normal case where enough time is secured for the drum reversal process by inserting coins, but it can also be used when the number of coins inserted is small. (see [F] in the figure). First, if time passes during the cool-down process, complete the cool-down process before transitioning to soft wrinkles. Next, when the time reaches zero in the time control range by the 5-minute timer (43>), the process immediately shifts to the cool-down process (see 0 in the figure), and then automatically shifts to the soft wrinkle process. The same is true when the temperature control thermometer (16) reaches zero during the heating drying process, which is intermittent even once. However, when the temperature control thermometer (16) does not intermittent even once, that is, when the time reaches zero without increasing the temperature to about 70℃ (when the number of coins inserted is small or when the load is large), the cool-down occurs. Since there is no need for this, the process immediately shifts to soft wrinkles (see C in the figure). During this time, the display (25) indicates the time zero, and the buzzer (30) operates at the time zero.

Here, if the number of coins inserted is found to be small, the user inserts additional coins. The main control unit 1l- (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.

In other words, if the cool-down process or drum reversal process is progressing, all other data except the data for extending the operating time due to additional coin insertion are cleared, the exhaust treatment flag is set, and the operation is started for the new operating time based on the extended data. Time timer <37)
Reset to . Therefore, the main control section (34) restarts the operation from the heating drying process. On the other hand, if the heating drying process is in progress, the new operating time based on the extension data is set using the operating time timer (3
7) and clear the temperature control match flag and intermittent frequency counter. Therefore, in this case, the main control section (34) causes the heating drying operation to be performed for a long time (see FIG. 2 (a)). The latter applies when the items to be dried are replaced, and the latter applies when additional items to be dried are added during operation, and in both cases the door (14) must be opened once.

The door (14) may be opened during the process to check the drying condition of the material to be dried. In this case, by inputting the activation signal of the door switch (15), the main control unit (3
4) Stops all output by the door opening/closing control unit (4B),
The intermittent frequency counter (42), temperature control coincidence flag, and drum reversal flag are cleared, and the exhaust processing flag is set. This is due to the opening of the door (14) during the heating drying process.
) In order to compensate for the temperature drop inside the drum, the heating drying process is restarted from the beginning, and in the drum reversal process, the finished material to be dried is taken out and the remaining drying time is used to dry other items. This means that the process starts from (see [F] in the figure). However, if the door (14) is opened during the cool-down process, the remaining cool-down process continues when the door (14) is closed again unless an additional coin is inserted at the same time.

(G) Effects of the Invention According to the present invention, by adding time control to the control based on the number of intermittent cycles of the temperature regulator, it is possible to carry out drying with no excess or deficiency from the rated load to the small load. .

[Brief explanation of drawings]

Figure 1 is a control block diagram of the dryer according to the present invention, Figures 2 (A) and (B) are flowcharts for explaining the operation, and Figure 3
The figure is a front sectional view, and FIG. 4 is a side sectional view. (2)...Gas burner (heater), (4)...Rotating drum, <6)...Fan, (16)...Temperature control thermometer (temperature detection means), (9)... Microcomputer, (34)
... Main control section, (41) ... Heating drying control section, (4
2)... Intermittent number counter (CNT), (43)...
- Predetermined time (5 minutes) timer.

Claims (1)

[Claims] (1) A rotating drum that accommodates the material to be dried, a heater and a fan that supplies drying air to the rotating drum, and temperature detection that detects when the drying air temperature reaches a certain temperature and turns on and off the heater. a counter for measuring the number of intermittent occurrences; a frequency determination section for comparing the intermittent number with the reference number and outputting a match signal when they match; a timer for measuring a predetermined time from the arrival of the match signal; A dryer comprising: a control unit that terminates a heating operation based on a timer output.