JPS58212500A - Dryer - 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 The present invention is capable of completing drying in the shortest possible time even when the steam pressure is low in drying using the heat of a radiator that uses steam as a heat source. .

When drying with the heat of the fugiator, do not pass the T into the fugiator.
If the steam pressure is low, it will take a long time to finish drying.
In the worst case, drying cannot be completed.

When the present invention determines that the drying time will be longer due to low vapor pressure, the number of radiators used is increased to increase the heat output, and if sufficient drying is still not possible, an alarm is issued to notify the user. The purpose is to prevent unnecessary lengthening of driving time.

Therefore, the present invention divides the radiator into multiple stages, inspects the population IAI+temperature multiple times after the start of drying operation, and detects when the detected temperature is below the set point temperature, which is set somewhat lower than the inlet side set temperature. In addition to increasing the number of radiators used, they also set up an alarm to be issued during the final inspection if the AR inlet temperature is below the minimum allowable inlet temperature.

To explain based on the diagram below, (NON is a clothes dryer that has a clothes loading door (2) on the front, and above this door there is a main switch (3) for loading and shutting off at 1, an automatic Dryness adjustment knob (4) for adjusting the degree of dryness at the end of the detection course, keyboard 85 for course setting, time setting, or temperature setting, fluorescent display tube for time display (6J, for temperature display) A fluorescent display tube (7) and a steam pressure gauge (8) that displays the pressure of the steam that is the heat source for drying are installed.Also, in the drying chamber (9) formed in the center of the inside of this clothes dryer, there is a The drying drum (1G is rotatably provided, and a radiator is installed on the top) υa'aa31 is divided into three parts, and the top is equipped with a bottomed cylindrical filter (lΦ and an exhaust blower 1).
151 has been established. Said three-divided radiator
Among +12Jα3, one radiator aυ is connected to the steam supply pipe (17) VC T through the first steam valve (16), and the other two radiators +121 (131 are connected through the common second steam valve al) Said steam supply pipe (17) V'C
Further, from this steam supply pipe (17), a humidifying pipe (19) is branched and its tip is opened to the drying chamber (9), and a live steam valve (4) is installed in the middle of this humidifying pipe. and a manual opening adjustment valve (21).The drying drum circle is rotated by a motor c!41 via a pulley 1221 (2~), and an exhaust blower (151 is connected to another motor f251). Rotates due to rC...:1' As the exhaust blower rotates, air is sucked in from the intake port (to) and the radiator αυ1121 (
It is heated at step 131, then enters the drying chamber to remove moisture from the clothes and is then discharged from the exhaust port 127). Then, the inlet temperature sensor of the radiator αυ (chimister between 11fi3 and the drying drum track) is connected to the drying drum I.
III+-3 which also consists of teamister on the exit side of II
Temperature detectors (21 are provided respectively; the bird...l
This is a printed circuit board that constitutes the Jd circuit, and a block diagram of this circuit is shown in FIG. The control circuit is mainly composed of a microcomputer, and the central processing unit (C31)
In this embodiment, RAM is built-in. The CP is connected through a data path (8 bits) between the ROM (3a) that stores the program
U clD (c is an IC for input/output expansion: I: (31
and C3 are connected, making it possible to handle a large number of inputs and outputs. The inputs of the CPU cll include the inlet temperature, outlet temperature, and the set values for the dry adjustment heir (4). □ 5 bits from the D/A converter (to) that outputs the settings for the operating course, time, and temperature. and a keyboard switch for starting and stopping operation, and a course preset switch (361) for selecting and setting the operation course when the power is turned on.
4 bits from 50H2/60Hz specification changeover switch, door switch, and thermal switch Gη, and 1 bit from the reset circuit (to) for resetting rCCPU (lυ) at power-up There is an external interrupt terminal that generates a rectangular wave voltage at the power frequency and inputs it to the external interrupt terminal of the CPUC311. One for the fluorescent display tube (6), one for the fluorescent display tube (7) for displaying temperature, etc., and a D/A converter for easily reading temperature measurement and dryness adjustment knob settings. (c) and the steam valve (leα & live steam valve■
・Fan motor (25+) for driving drum motor C2 and buzzer (4 (output to I).

Here, the operation of the dryer of this embodiment will be sequentially explained according to the flowchart of FIG. -! When the power is turned on, the shirt circuit (to) operates and the CPU
Starts execution from the instruction stored at the start address r of OMC31, resets all outputs, and stores 9 in the RAM area.
”) 71. After that, input the open/close status of 50H!, /60H! specification changeover switch (3n), and select 50Hz specification or 60H!
Determine whether it is the z specification.

Then, input the opening/closing status of the course/preset switch 2 and set the time and temperature for the operating course specified by this course/preset switch. This is based on the actual usage situation of the commercial steam dryer. In most cases, a particular operating course is used exclusively, and for example, in a dryer exclusively used for clothes washed in an oil dry washing machine, only the time control course program (2) is often used. Press the coarse preset switch (
By specifying program 0 of the time control course in advance in (b), the time control Mars program ■ will be set when the power is turned on, and operation can be started simply by pressing the start key on the keyboard (5). This is because it has the advantage of making it very easy to set the driving course.O Here, I will briefly explain the setting of the driving course.0When the power is turned on, the above-mentioned course preset switch? Since the driving course and program number are set by (to), the data of the inlet set temperature, outlet set temperature, hot air set time, and cold air set time written in advance in ROJ33 is retained in the FIAMvcfIi1 in the CPU 434). Written in a predetermined area. In addition, an area is secured in the RAM to store data on heat R operation time and cold air operation time, and remaining operation time or total operation time is stored.

The driving course can also be set using the keyboard (5). When the driving course and program number are set using the keyboard, the data in ROM (33) is written to the RAM in the same way as when the power is turned on. Other than the hot air setting time and setting temperature, the settings can be changed using the keyboard (5), and a part of the drying program prepared in advance can be changed.The operation can be carried out based on the data in the eight person M.

When the initial settings at power-on are completed, @4h(a)11
111 The operation routine starts from 1 in the flowchart.

First, time is counted in units of one second based on the input from the external interrupt circuit G9, and during operation, it is used as a basis for output control and used to count the operating time. Next, the KD/A converter C6 controls the set values of the inlet temperature, outlet temperature, and dryness axis knob (4), and sets the automatic detection course, for example, when the automatic detection course is pressed. When the start key (included in the keyboard switch (5)) is pressed after the course has been completely set, the state of the door/swift G force is input, and if the door is closed, the operation mode is entered.・The processing of the keyboard switch (5) is as shown in Figure 4 (c) ~
This is carried out according to the flowchart shown in FIG.

First, it identifies which key was pressed and performs processing corresponding to each key. The automatic detection key is activated not only while driving or when an abnormality occurs, but also when stopped mid-way.

This is the same for other course keys (however, the live steam input key can be accepted even during operation.Note: this is the case), so it is not possible to easily change from the automatic detection course to another course. This is essential for normal operation and prevents the run-in data of the automatic detection course from being cleared due to accidentally pressing another course key while driving on the automatic detection course. be. However, before starting operation,
It is possible to change from the automatic detection course. In addition, when the user wishes to change from the automatic detection course to another course, by pressing the stop key again from the mid-stop state, the CPU (ill) will be returned to the state before the start of operation, and the user will be able to change the course. It becomes possible.

By performing the above-mentioned processing, it is possible to prevent erroneous operation of the keyboard switch (5) during a stop in the middle of an automatically detected course where it is necessary to maintain driving data, and it is also possible to prevent the user from intentionally changing the course. Even when changing the course, it can be easily changed by pressing the stop key twice, so there is no need to provide a special key for changing the course, which is very effective.

The start key starts the operation from before starting or from a stopped state, but at this time, if the door is open or the settings are incomplete, the start key will not start. As is clear from looking at the temperature, the outlet temperature can be as much as υ higher than the inlet temperature, so if the outlet temperature is set higher than the inlet temperature, normal drying operation may not be possible. There is. Therefore, if you check the set values when you press the start key and issue an alarm if there is a problem, you can reset the settings and restart immediately without driving unreasonably. It's convenient, and the drum (2I) is 1
It is reversed at a cycle of 5 seconds 0N and 2 seconds OFF. Also, depending on the set values of the inlet temperature and outlet temperature, the steam valve aeu is opened and closed to control the radiator Iα2 (13) as shown in the flowchart in Fig. 4 (2). go to

When both the outlet temperature and the inlet temperature are below the set temperature, the steam valve t
Open any of the te tts and set the radiator συa2
The temperature of the hot air is increased by a3, but at the start of operation, it is necessary to change the opening combination of the steam valve aea8 depending on the set value of the inlet temperature.
In this embodiment, when the inlet set temperature is 131°C or higher, both steam valves 1e and U are opened and the radiator αυ 113 (13 is set to 3 stages, When the inlet temperature setting is above 96°C and below 150°C, open only one steam valve tilt and open radiator tlaG3 twice.
When the inlet set temperature is 95℃ or less, the steam valve (t
Only one valve 61 is opened to form a radiator (111 is one stage).

In addition, with steam dryers, the steam pressure may drop due to the relationship with other steam-consuming equipment and it may not be possible to reach the set inlet temperature. In this case, check the inlet temperature. If the inlet temperature is 1:'1,1° lower than the preset temperature, which is calculated by subtracting 5 degrees from the inlet set temperature, the steam valve should be turned on to cool the radiator 3 and 4 minutes after the start of operation. Open and close. Furthermore, if the allowable minimum inlet temperature determined by the inlet set temperature has not been reached 5 minutes after the start of operation, an alarm will be issued to notify you of insufficient temperature rise. In the case of this embodiment, the inlet set temperature is 151 ° C.
In the above cases, the minimum allowable inlet temperature is 100℃, and when the inlet set temperature is 106℃ or above, the minimum allowable inlet temperature is 70℃.
When the inlet temperature setting is 50°C or higher, the minimum allowable inlet temperature is also 50°C. It should be noted that the above-mentioned underachievement temperature and the allowable minimum inlet temperature are stored in the microcomputer in the same way as the inlet II set temperature and the outlet side set temperature.

By performing the above-mentioned control, even if the steam pressure decreases, the time required to reach the inlet set temperature will not be prolonged, and when the main valve of the steam supply pipe aη is closed,
Since the lowest inlet temperature is not reached, an alarm is issued 5 minutes after the start of operation to notify of an abnormality, which is very convenient.

When the inlet temperature or the outlet temperature is higher than the respective control temperature, one steam valve f161Q8t is closed, and the steam valve aeaa is closed until both the inlet and outlet temperatures are lower than the control temperature.
s doesn't open.

However, the outlet temperature setting of the automatic detection course specifies the upper limit of the outlet temperature, so if the outlet temperature remains above the outlet temperature setting for 5 seconds, hot air operation will start? The process ends and shifts to cold air operation.

During strong wind operation from 3 minutes after the start of operation, if the inlet temperature exceeds the inlet set temperature by 50 degrees or more and remains for 10 seconds, or the outlet temperature exceeds the outlet set temperature by 15 degrees or more and remains for 110 seconds, an alarm will occur. emits to notify of excessive temperature rise.

The automatic detection course uses the fact that the outlet temperature changes as shown in FIG. 5 when the inlet temperature is kept constant to determine when to end the hot air operation.

After a while after starting operation, there is a period when the outlet temperature becomes almost constant (this is called the constant rate period l, -=5).

The automatic detection course is based on the difference between the inlet temperature and the outlet temperature during this constant rate period (this is referred to as T), and the difference between the inlet temperature and the outlet temperature is set using the dryness adjustment knob (4). value x
The operation is stopped when the value becomes smaller than the product xT of (0,5<x<1) and the reference value T.

As described above, in the present invention, when the inlet temperature of the drying chamber does not rise to the set value due to low vapor pressure, etc., the radiators are added to be used sequentially, so the drying time does not become extremely long, and the radiator It's so hot that I set off an alarm.
It is possible to prevent unnecessary driving.

[Brief explanation of the drawing]

Figure 1 is a front view of the clothes dryer, Figure 2 is a vertical side view, Figure 5 is a block diagram of the information transmission section, Figure 4 1 (→~Q)
is a flowchart, and FIG. 5 is a T diagram showing changes in inlet temperature and outlet temperature. (111... Drying drum, riDri7JαJ-・Radiator, 1161 (II... Steam valve, (2 pieces...
Inlet temperature detector. Figure 4 (nu) (Nori 54 Figure 6

Claims (1)

[Claims] (1) The radiator is divided into multiple stages, and the set temperature on the inlet side of the drying chamber, the temperature at which the lower set value has not been reached, and the minimum allowable inlet temperature as low as )lH are stored in the microcomputer, and the Check the inlet temperature several times,
The dryer is configured to increase the number of radiator stages used when the detected temperature is below the preset temperature, and to issue an alarm if the inlet temperature is below the allowable minimum inlet temperature at the time of final inspection.