JPH03167365A - Drying of packaged textile goods and equipment used therefor - Google Patents

Abstract

PURPOSE:To remarkably shorten drying time without damage to fibers by measuring the inner temperature of textile goods and the temperature of hot air at the outlet of a drying chamber with time and raising the temperature of the hot air till completion of moisture evaporation from the surface of the fibers. CONSTITUTION:When drying packaged textile goods 5 charged in a drying chamber using hot air circulating a circulating path sent from a blower 1 through a heater 2, the drying chamber 3 and a cooling unit 4 to the blower 1 again, the temperature of the hot air is set to a higher temperature than the optimum temperature for drying the textile goods till completion of moisture evaporation from the fiber surface of the above mentioned textile goods. As soon as evaporation of moisture from the fiber surface of the above mentioned packaged textile goods is completed, the temperature of the above mentioned hot air is lowered to the optimum temperature for drying the textile goods, thus drying the objective goods.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for drying packaged textile products such as cheese and an apparatus used therefor.

[Conventional technology]

When drying packaged fiber products such as cheese that have been wet after dyeing, washing, etc., an apparatus as shown in FIG. 5 has conventionally been used. This device includes a blower l,
It is equipped with a heater 2, a drying pot 3, and a cooler 4, and from the blower 1 to the heater 2, drying pot 3. The packaged textile products 5 loaded in the drying pot 3 can be dried by hot air circulating through the circulation path that passes through the cooler 4 and returns to the blower 1. Drying pot 3 above
The drying process begins with a dehydration process in which the inside of the drying pot 3 is pressurized to dehydrate under pressure from the outside to the inside of the package, and then the water between the fibers is evaporated by passing hot air from the inside to the outside of the package. The drying process is divided into a drying process where the drying process is almost completed, and a humidity conditioning process where hot air is passed through the package from the outside to the inside to adjust the humidity. It is automatically controlled according to conditions. For example, as shown in FIG. 6, the dehydration is performed for a predetermined time set in advance by a timer T1 (
The direction of the hot air in the drying pot 3 is from the outside of the package to the inside of the package. After a predetermined period of time, a switching cock is activated to reverse the direction of the hot air and release the pressure for dehydration. Then, as the drying progresses, the temperature inside the package rises and when moisture evaporation has sufficiently progressed, the timer T2 is activated, and after a preset period of time has elapsed, the switching cock is activated and the inside of the drying pot 3 is re-entered. Change the direction of the hot air from the outside of the package to the inside. In this state, the humidity adjustment process is performed for a predetermined period of time determined by the timer T3. However, above 3
While the process in each step is progressing, the temperature of the hot air sent into the drying oven 3 is controlled to consistently maintain a constant set value. This control is performed using a temperature sensor B on the outlet side of the heater 2.
(See FIG. 5) is provided, and the temperature of this temperature sensor B is set in advance according to the heating type, processing conditions, etc. so as to keep the temperature constant at all times. Further, the start of the operation of the timer T2 is specifically determined by the temperature sensor
This is done by transmitting an operation instruction signal when the dryer outlet temperature read by the dryer (see figure) reaches a predetermined temperature R. [Problem to be solved by the invention] However, in such a drying method, the time required for the drying process to evaporate the moisture between the fibers is long;
Reducing that time has become an important issue. On the other hand, it is possible to accelerate drying by setting the hot air temperature higher, but if the temperature is set higher than the appropriate hot air temperature that has been empirically established, textile products will not be heated excessively. As a result, the oiling agent impregnated to give the thread smoothness burns, resulting in oiling burn phenomenon, which causes the fiber surface to turn yellow, resulting in a decrease in quality.

The present invention was made in view of the above circumstances, and an object of the present invention is to provide a method and apparatus for drying textile products that can shorten the drying time without damaging the textile products.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention provides for drying packaged textile products loaded into the drying kettle by hot air circulating in a circulation path from the blower through the heater, the drying kettle, the cooler, and back to the blower. In the drying method, the temperature of the hot air is set higher than the appropriate drying temperature for the textile product until the moisture evaporation from the fiber surface of the packaged textile product is completed, and the temperature of the hot air is set higher than the appropriate temperature for drying the textile product. As soon as a point is reached where water evaporation of
The first gist is a method for drying packaged textile products in which the temperature of the hot air is lowered to the appropriate temperature for drying the textile products, and includes a method for drying packaged textile products, which includes a blower, a heater, a drying oven, and the like. An internal temperature sensor that reads the internal temperature of the packaged textile product over time in a device that dries the packaged textile product loaded in the drying pot using hot air that circulates through a circulation path that passes through the cooler and returns to the blower. A, a heater outlet temperature sensor B that reads the temperature of the hot air on the outlet side of the heater over time, and a setting device C that inputs in advance the temperature at which moisture evaporation from the fiber surface of the textile product to be dried is completed. and,
The heater outlet temperature read by the heater outlet temperature sensor B is inputted in advance by a setting device D into which two types of temperatures, an appropriate drying temperature P for textile products and a predetermined temperature Q higher than the above-mentioned appropriate temperature, are inputted. A heating control means for controlling the hot air heating by the heater to match either the set temperature P or Q inputted to the setting device D, and a temperature S inputted to the setting device C and read by the internal temperature sensor A. and an instruction means for instructing the heating control means to change the temperature from time to time, and when the two match, the temperature at the outlet of the heater and the internal temperature of the textile product from the start of operation to the set temperature S. Until this temperature is reached, the temperature is controlled to match the temperature Q which is higher than the appropriate drying temperature, and the above set temperature 3 is maintained.
The second gist is a drying device for packaged textile products that is controlled to match the positive heating temperature P at the same time as the heating temperature P is reached. Circulation flow path back to? A device for drying packaged textile products loaded in the drying kettle using circulating hot air, comprising: a drying kettle outlet temperature sensor X for reading the temperature of the hot air on the exit side of the drying kettle over time; A heater outlet temperature sensor B that reads the hot air temperature on the side over time and a hot air temperature S' on the drying pot outlet side at the time when water evaporation from the fiber surface of the textile product to be dried is completed are input in advance. A setting device C, a setting device D into which two types of temperatures, an appropriate temperature P for drying textile products and a predetermined temperature Q higher than the above-mentioned appropriate temperature, are input in advance, and heating read by the heater outlet temperature sensor B. heating control means for controlling hot air heating by the heater so that the temperature at the outlet of the heater matches either of the set temperatures P and Q inputted to the setting device D; and an instruction means that momentarily compares the temperature read by the internal temperature sensor A and instructs the heating control means to change the temperature when the two agree, so that the heater outlet temperature is the drying pot outlet temperature from the start of operation. is controlled to match the temperature Q higher than the appropriate drying temperature until the set temperature S' reaches the set temperature S'.
The third gist is a drying apparatus for packaged textile products that is controlled so that it reaches the appropriate heating temperature P at the same time.

[Effect]

In other words, the inventor found that if the textile product is not sufficiently heated, even if the hot air temperature is higher than what has traditionally been considered an appropriate temperature, the fiber will not be damaged and the water in the fiber will not evaporate. We conducted a series of studies based on the idea that this might only promote the As a result, the internal temperature of the textile product or the temperature of the hot air at the outlet of the drying kettle is measured over time.
The present invention was achieved by discovering that even if the hot air temperature is increased, the fibers will not be damaged until the temperature reaches a predetermined temperature at which water evaporation from the fiber surface of the textile product is completed.

Next, the present invention will be explained in detail based on examples.

〔Example〕

FIG. 1 shows an embodiment of the drying apparatus of the present invention. This drying device, like the conventional drying device, is equipped with a blower 1, a heater 2, a drying pot 3, and a cooler 4. The hot air that circulates through the circulation channel that returns to the blower l again through
The packaged textile product 5 loaded into the drying pot 3 can be dried. Also, heater 2
A temperature sensor B is provided on the exit side of the drying pot 3, and a temperature sensor X is provided on the exit side of the drying pot 3. Further, in this device, as shown in FIG. 2, an internal temperature sensor A is provided, the sensor portion of which is inserted into the fibers of the packaged textile product 5. And each of these temperature sensors A and B
, The above control is performed in accordance with instructions from a control panel 10 having a structure as shown in FIG. 3, for example. That is, the system 11110 includes a setting device C in which the temperature S at which moisture evaporation from the fiber surface of the textile product 5 to be dried is completed is input in advance, and the appropriate temperature P for drying the textile product 5 and the above-mentioned appropriate temperature. A setter D, into which two types of temperatures, a predetermined temperature Q higher than P, is input in advance; and a set temperature P.P, in which the heater outlet temperature read by the heater outlet temperature sensor B is input into the setter D. heating control means l1 for controlling the hot air heating by the heater 2 so as to match either of the set temperatures S inputted into the setting device C and the inside temperature of the fibers read by the internal temperature sensor A inserted into the fibers; An instruction means 12 is provided which compares the temperature from moment to moment and gives an instruction to change the temperature to the heating control stage 11 when the two agree. Note that the temperature S at which moisture evaporation from the fiber surface of the textile product 5 is completed means that as drying progresses, the water film covering the fiber surface evaporates, the fiber is exposed, and the internal temperature of the fiber itself increases with heating. This is the temperature at which the temperature begins to rise rapidly. This temperature S is input in advance to the setting device C based on the type of fiber, processing conditions, etc. In addition, the appropriate drying temperature P for the textile product 5 is the appropriate hot air temperature for drying that has been known empirically, and drying at a higher temperature will eventually damage the fibers. This is the temperature that is said to cause This temperature is also input in advance to the setting device D based on the type of fiber, processing conditions, etc. For example, if it is a cotton product obtained by a general dyeing method, P = 105 to 110
°C, and for wool products, P = 95 to 100 °C. Then, a predetermined temperature Q higher than the above-mentioned appropriate temperature P
means a temperature of, for example, 130 to 135°C.

Therefore, according to this drying device, as shown in FIG.
The internal temperature of the temperature S(
Until reaching the temperature at which moisture evaporation from the fiber surface of the textile product is completed, drying is performed under drying conditions in which the heater outlet temperature is a predetermined temperature Q, which is higher than the conventional appropriate temperature P for drying. At the same time, when the internal temperature of the textile product reaches the temperature S input in advance into the setting device C, the heater outlet temperature decreases to the conventional appropriate temperature P for drying, and drying can be continued. There is.

Other control methods are the same as conventional ones, and explanations of the configuration and operation will be omitted.

As described above, according to the drying apparatus, the drying process is performed at a temperature Q higher than the conventional appropriate drying temperature P until the moisture evaporation from the fiber surface of the textile product 5 is completed.
The time it takes for the water to reach the water evaporation completion state can be significantly shortened. When this state is reached, the heating temperature is immediately lowered to the conventional appropriate drying temperature P, so subsequent drying is performed under mild conditions as before, and no damage to the fibers is caused. .

Next, each of the cotton yarn and wool yarn was dried according to the above method and a conventional method. The drying conditions and required time are as shown in Tables 1 and 2 below.

<When using cotton yarn> Yarn type: 100% cotton Thickness: 30/l Yarn repellency: 158 kg <When using wool yarn> Yarn type: 100% wool Thickness: 52/2 Thread amount: 166 kg (Left below margin) 1≦L1 Mugi As described above, it can be seen that according to the method of the present invention, the drying time can be significantly shortened compared to the conventional method.

In the above embodiment, an internal temperature sensor A that reads the internal temperature of the fiber over time is attached directly to the textile product 5, and the drying temperature is switched (Q-P) at the same time as the internal temperature of the fiber reaches the set temperature S. However, instead of providing the internal temperature sensor A, a drying pot outlet temperature sensor X (see FIG. 5) may be used. in this case,
The drying pot outlet temperature S' (see Fig. 4) at the time when water evaporation from the fiber surface is completed is set in advance in the setting device C, and the drying pot outlet temperature sensor X is set at the above set temperature S'.
At the same time, the drying temperature is switched (Q-+P)
Make sure to do the following.

Furthermore, in the above embodiment, each blower 1, dryer 2, drying pot 3, and cooler 4 that form the hot air circulation path may be any type of device, and may be any type of device known in the art. They are selected from a variety of sizes and combined.

[Effects of the Invention] As described above, according to the method for drying packaged textile products of the present invention, it is possible to significantly shorten the drying time, which was previously considered difficult, without causing damage such as discoloration of textile products. can be admonished. Further, according to the drying device of the present invention, the above method can be easily carried out by simply making improvements to the conventional drying device.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram showing one embodiment of the drying apparatus of the present invention, Fig. 2 is a detailed explanatory diagram of the manner in which the internal temperature sensor used in the above embodiment is attached, and Fig. 3 is a diagram showing the control panel used in the above embodiment. 4 is a diagram showing the temperature change of each part as the process of the above embodiment progresses, FIG. 5 is a horizontal diagram showing an example of a conventional drying device, and FIG. FIG. 3 is a diagram showing temperature changes in each part as the process progresses. 1...Blower 2...Heater 3...Drying pot 4
... Cooler 5 ... Textile products 10 ... Control panel
1l... Heating control means 12 Indication means A, B, X・
...Temperature sensor C, D...Setting device

Claims (5)

[Claims] (1) A method for drying a packaged textile product loaded in the drying pot using hot air circulating in a circulation channel from a blower through a heater, a drying pot, a cooler, and back to the blower. The temperature of the hot air is set higher than the appropriate drying temperature for the textile product until the moisture evaporation from the fiber surface of the packaged textile product is completed. A method for drying a packaged textile product, characterized in that the temperature of the hot air is lowered to an appropriate temperature for drying the textile product. (2) The packaged textile product according to claim (1), wherein the point in time when moisture evaporation from the fiber surface of the packaged textile product is completed is read by a temperature sensor that reads the internal temperature of the packaged textile product over time. Drying method. (3) The packaged fiber product according to claim (1), wherein the point in time when moisture evaporation from the fiber surface of the packaged fiber product is completed is read by a temperature sensor that reads the hot air temperature on the outlet side of the drying kettle over time. How to dry the product. (4) In an apparatus for drying packaged textile products loaded in the drying pot by hot air circulating in a circulation channel from a blower through a heater, a drying pot, a cooler, and back to the blower, the package An internal temperature sensor A that reads the internal temperature of the textile product over time, and a heater outlet temperature sensor B that reads the hot air temperature on the exit side of the heater over time.
, a setting device C into which the temperature S at which moisture evaporation from the fiber surface of the textile product to be dried is completed is input in advance, an appropriate drying temperature P for the textile product, and a predetermined temperature Q higher than the above-mentioned appropriate temperature. Setting device D where two types of temperatures are input in advance
and the heater outlet temperature read by the heater outlet temperature sensor B is the set temperature P input into the setting device D.
, Q, and a heating control means that controls the hot air heating by the heater to match either of the temperature S input to the setting device C and the temperature read by the internal temperature sensor A. , an instruction means for giving a temperature change instruction to the heating control means when both agree, and the heater outlet temperature is set at the appropriate drying temperature from the start of operation until the internal temperature of the textile product reaches the set temperature S. A drying device for packaged textile products, characterized in that the drying device is controlled to match a temperature Q higher than the temperature Q, and is controlled to match a suitable drying temperature P at the same time as the set temperature S is reached. (5) In the apparatus for drying packaged textile products loaded in the drying kettle using hot air that circulates through a circulation channel from the blower through the heater, drying kettle, cooler, and back to the blower, the drying A drying kettle exit temperature sensor Hot air temperature S at the outlet side of the drying pot at the time when moisture evaporation from the surface is completed
′ is input in advance, a setting device D is input in advance with two types of temperatures: an appropriate drying temperature P for textile products and a predetermined temperature Q higher than the above-mentioned appropriate temperature, and the heater outlet temperature. heating control means for controlling hot air heating by the heater so that the outlet temperature of the heater read by the sensor B matches either the set temperature P or Q input to the setter D; an instruction means for momentarily comparing the input temperature S' with the temperature read by the internal temperature sensor A, and giving a temperature change instruction to the heating control means when the two match; From the start of operation until the drying pot outlet temperature reaches the set temperature S', the temperature is controlled to match the temperature Q, which is higher than the appropriate drying temperature, and at the same time when the drying pot outlet temperature reaches the set temperature S, the temperature is adjusted to the appropriate heating temperature. A drying device for packaged textile products, characterized in that the drying device is controlled to match P.