Temperature control method of hot air drying device and hot air drying device
A temperature control method and hot air drying technology, applied in the directions of drying gas arrangement, heating to dry solid materials, drying solid materials, etc., can solve the problems of warp dryness deviation, reduced warp beam quality, poor temperature control accuracy, etc. The effect of precision
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Embodiment 1
[0064] exist image 3 2 shows a series of processing flows for calculating the PID constants corresponding to the high-temperature region, the medium-temperature region and the low-temperature region by the temperature controller 52 .
[0065] For example, the operator sequentially performs selection operations on the menus displayed on the touch panel of the setting device 66 , and when a menu indicating to enter the auto-tuning mode is selected, the setting device 66 outputs information on the purpose to the main controller 50 , the main controller 50 shifts to the auto-tuning mode (ST101).
[0066] And, in the tuning mode, the main controller 50 prohibits the operation of the warp sizing machine, and uses the tuning function of the temperature controller 52 to calculate the PID constants for the target temperature respectively, and in addition, executes the method for converting the obtained PID constants to each The target temperature is stored in the setter 66 for a seri...
Embodiment 2
[0086] The control block diagram of the hot-air drying device 10 shown in Figure 5 is to replace embodiment 1 with a temperature controller 52a without automatic tuning function ( figure 2 ) embodiment of the temperature controller 52 shown.
[0087] The setting unit 66 can connect a database storing related PID constants to a separately provided memory 68 , so that the memory 68 and the setting unit 66 constitute a PID constant output device. The database stored in the memory 68, for example, can constitute a system capable of searching PID constants based on the target temperature T, machine setting parameters, environmental conditions (altitude, average temperature) of the installed machine, and the like.
[0088] The database is provided by the manufacturer of the hot air drying device 10a, but may be rewritten by the user of the hot air drying device 10a.
[0089] In addition, memory 68 also can be built in setting device 66, also can be the host computer connected by co...
Embodiment 3
[0094] Image 6 The control block diagram of shown hot-air drying device 10 is that embodiment 1 ( figure 2 ) shows an example in which the setting unit 66 is composed of a variable resistor 66a, which is an element like a potentiometer that outputs the target temperature as an analog electric signal.
[0095] The variable resistor 66a outputs, to the temperature controller 52 and the constant signal generator 70, an analog electric signal as a target temperature set value signal corresponding to the memory according to an operator's operation.
[0096] The constant signal generator 70 with the PID constant output device function of the present invention has: a comparator 72 that compares the analog electrical signal input value with a plurality of preset thresholds, a plurality of PID constants that set different PID constants respectively A setter 74 and a converter 76 are connected to a plurality of PID constant setters 74 and comparators 72 . The plurality of thresholds ...
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