JPS63229100A - Gas 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) Field of Industrial Application The present invention relates to a clothes dryer using a gas burner and particularly suitable for a coin type dryer.

(B) Prior Art An example of this type of clothes dryer is disclosed in Japanese Patent Publication No. 60-25154, which counts the number of failures in the gas burner ignition operation at the start of operation, and calculates the number of failures when the number of failures is determined by a predetermined number of times. When this point is reached, a malfunction message is displayed and a service person is called.

However, such failures can be caused by forgetting to open the gas main valve, or by a drop in gas pressure and gas supply due to simultaneous use of multiple machines, such as in coin-operated laundry machines, which can lead to malfunctions in the ignition system or gas pulp. It may not be the cause.

(c) Problems to be solved by the invention The present invention improves the abnormality display function by distinguishing between ignition failure (failure due to ignition failure) and mid-fire misfire, and eliminates the need to call a service person for ignition failure. This system is designed to reduce the number of calls to service personnel and quickly identify the service location by temporarily identifying the location of service personnel.

(d) Means for solving the problem The solution according to the present invention includes a gas burner that burns intermittently using a temperature control thermostat, etc., and an ignition device for this gas burner.
A rotating drum that can supply dry air from the gas burner, a misfire counter that counts the number of misfires of the gas burner, a misfire counter that counts the number of misfires during combustion of the gas burner, the misfire detection section, and a misfire state. A display device capable of distinguishing and displaying the misfire condition and the misfire condition, and a display device that compares the contents of the misfire count counter with the standard count and displays the misfire condition, and compares the contents of the ignition failure count counter with the standard count and if no misfire is detected. This configuration includes a control section that displays the ignition failure state and also displays the misfire state if a misfire is detected.

(E) Effect: The number of ignition failures and the number of misfires are counted separately, and the state is distinguished and displayed on the display based on the count, but even if the number of ignition failures is a predetermined count,
If a misfire is detected during the process, it is displayed as a misfire condition. In other words, misfires are often caused by instability in the gas supply, so even if ignition failure occurs in this unstable state, the next step is to resolve the instability in the gas supply.

(f) Example: Below is a rated capacity of 10k that can be used frequently at 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 Figures 3 and 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. The front side is provided with 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 scenery by the fan (6) is 10.5m3/win ~
The range is 17m3/min.

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

A temperature control thermostat (16) (temperature detection means) for detecting the temperature of the drying air is provided between the rotating drum (4) and the filter (5). In addition, a superheat prevention thermometer (A < 17) is installed on the side of the combustion chamber (3), and a superheat prevention thermometer (B
) (18) are provided respectively, and the thermometer (B) (ts>
-ζ- normally does not operate because the flame of the gas burner (2) is slightly tilted by the air flow, but is designed to operate when the air flow rate decreases and the flame starts to rise.

Next, to explain based on 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 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) operated by an inserted coin (coin, card, etc.), a door switch (15), and a manual reset. A switch (27), a plurality of DIP switches (28) that allow the owner to manually select automatic control operation in this embodiment, heating drying operation for a time corresponding to the number of coins inserted as in the past, etc. - Input from the thermometer (B) (18) (provided on the circuit board), and input the ignition information of the gas burner (2) and the power information for the intermittent temperature control thermometer (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) is connected to a totalizer (31) that counts the total number of coins inserted, and is also connected to a gas igniter (32) via a temperature control thermostat (16), which is further connected to a thermostat (A) (17). 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 dryer of this embodiment executes a heating drying process, during which the microcomputer (9) detects and controls abnormalities during operation, especially abnormalities related to ignition and combustion of the gas burner (2>), and The display will be explained based on Fig. 1 and Fig. 2 (flowchart).The main control section (34)
It outputs control signals to each control unit based on the data stored in M (35) and various input signals, and when the signal is input from the coin switch circuit (26) after power is turned on,
Set the exhaust processing flag at the specified address in RAM (36).

When coins are inserted, the main control unit (34) allows the timer time control unit (37) to set the time corresponding to the number of coins inserted in the operation time timer (38), and thereafter causes the time to be subtracted, and also causes the display (25) to set a time corresponding to the number of coins inserted. ), the display control section (39) causes the set time and the remaining time to be displayed digitally.

Normally, the exhaust treatment section (41) performs exhaust treatment (pre-barge) for 15 seconds set in the exhaust time timer (40).
, turn off the exhaust treatment flag, and turn off the gas burner (2).
Gas is supplied from the gas valve (33) to the ignition device (32), and the ignition device (32) directly ignites the gas. During this ignition, the main control unit (34) receives power information by turning on the temperature control thermometer (16) and ignition information by opening the gas valve (33), but the ignition device (32) When the gas valve (33) is closed after the ignition spark is opened for about 5 seconds and the ignition information disappears, it is determined that there is an ignition failure, and the ignition failure count counter (42) is incremented by one. On the other hand, if the ignition device (32) detects a flame with a flame rond etc. after 3 seconds of spark and continues to open the gas valve (33) as normal, the heating and drying control unit (43) executes the heating and drying process as ignition is successful. do. In this process, the temperature control thermometer (16) detects 70℃ and turns off.
Open and release the gas valve (33) each time the temperature control thermometer (16
) is counted by an intermittent number counter (44), and the end of this process is detected based on this count.

During the process, the gas burner (2) may go out due to factors such as blowing out by the wind, a drop in gas pressure, or a lack of gas supply.
3) Close. The main control unit (34) determines this as a misfire since the ignition information is no longer available. Then, 1 is added to the misfire count counter (45) and the contents of the misfire count counter (42) are cleared.

Due to ignition failure, misfire, or temperature control thermostat (16) being turned off, the gas burner (2) must be re-ignited after pre-purging.

In this way, the contents of the misfire count counter (45) can be detected by the misfire detection section (46), and the contents of the misfire count counter (45) can be detected by the misfire detection section (46).
2) and the contents of the misfire count counter (45) are set in advance by RO.
The standard number of times (for example, 5 times) that can be stored in M (35)
and are compared during the operation time by the comparing sections (47) and (48), respectively. When the misfire comparison section (48) outputs a coincidence signal, the main control section (34) sends the display control section (39) to the display control section (39).
This causes the display (25) to alternately display 'E2', which corresponds to a misfire, and the remaining time. In addition, the ignition failure comparison section (4
When a match signal is output from 7), the main control unit (34) further determines whether the content of the misfire count counter (45) is 0 or not based on the output of the detection unit (46), and if it is 0, the ignition is stopped. ``EIJ'' corresponding to a defect and the remaining time are displayed alternately, and if it is 1 or more, it is considered a misfire and 1E2'' and the remaining time are displayed alternately. Incidentally, the progress of the timer (38) is also stopped at the same time as the abnormality display operation.

In this way, the gas burner (2) is connected to the power information (temperature control thermometer).
16) is ON). When there is no ignition or combustion and there is no ignition information despite the input of 16), abnormality indications are distinguished depending on the conditions. For example, in the early stages of operation, ignition failures may occur 5 times in a row, or the temperature control thermostat (1
6) was turned OFF and every time the ignition operation was performed to return it to ON, ignition failure occurred, resulting in a total of 5 times. In the former case, the gas main valve is often closed, so open the gas main valve and operate the reset switch (27) to restart the operation. If the above symptoms still occur, please use the gas valve (3)
3) or the ignition system (32) (spark plug position, gas valve failure, etc.). Therefore, this abnormal display of "El" indicates that a service person is required if the main valve is open.

On the other hand, if the ignition is normal and the misfire display "E2" is caused by blowing out during operation or a drop in gas pressure, etc., it is temporary or can be resolved by modifying the gas supply system, and should be referred to a service person. This indicates that it is not particularly necessary.

Even if the ignition failure is counted five times, if a misfire is detected by the misfire detection unit (46) or the counter (45>) during that time, the ignition failure is caused by a drop in gas pressure or gas supply amount. This is called "E2".
” is displayed as a misfire.

Therefore, the gas supply device can be repaired and the operation can be resumed. If the ignition failure falls under 'El,' the abnormality will occur at the time of restarting the operation and can be dealt with.

(G) Effects of the Invention According to the present invention, ignition failure and misfire of the gas burner are distinguished and displayed, and even when a misfire is detected even in a ignition failure state, it is treated as a misfire condition, so a misfire can be easily corrected. It is possible to eliminate the cause and call a service person only when there is still an abnormality, which prevents a decrease in the operating rate due to a call to the service person, and allows the location to be repaired to be quickly identified. Therefore, it is possible to provide a gas-type clothes dryer with high management performance.

[Brief explanation of drawings]

Fig. 1 is a control block diagram of the dryer according to the present invention, Fig. 2 is a flowchart for explaining the operation, and Fig. 313! 1 is a front sectional view, and FIG. 4 is a side sectional view. (2)... Gas burner, (4)... Rotating drum, (
9)...My fan, (16)...Temperature control thermo, (
25)...Indicator, (32)...Gas igniter, (
33)...Gas valve, (34)...Main control section, (
42)...Ignition failure number counter, (45)...Missfire number counter, (46)...Misfire detection unit, (47)
... Ignition failure comparison section, (48) ... Misfire comparison section.

Claims (1)

[Claims] (1) A gas burner that burns intermittently using a temperature control thermostat, etc., an ignition device for the gas burner, a rotating drum to which dry air from the gas burner is supplied, a ignition failure counter that counts the number of ignition failures of the gas burner, and a gas burner ignition device for the gas burner. a misfire counter for counting the number of misfires during combustion; a misfire detection section; a display capable of distinguishing and displaying a misfire state and a misfire state; and a misfire counter that compares the contents of the misfire counter with a reference number. A control unit that displays a misfire state, compares the contents of a misfire count counter with a reference number, displays a misfire state if no misfire is detected, and displays a misfire state if a misfire is detected. A gas dryer featuring: