JPH042856A - Heater - Google Patents

Abstract

PURPOSE:To obtain a heater capable of continuously running a thin walled beltlike unit containing a treating agent in a heating chamber provided with a fouling sensor at a specific position, feeding hot air, evaporating the treating agent, discharging the evaporated treating agent with a duct capable of regulating the discharge rate and carrying out control in conformity with conditions of produced fouling gases. CONSTITUTION:In a heater for continuously heat setting a thin-walled beltlike unit such as a fabric 7 and drying the beltlike unit, the thin-walled beltlike unit 7 containing a treating agent is continuously run in a heating chamber 1 equipped with a fouling sensor 8 in conformity with a part near an outlet (1a) in the heating chamber 1 in which the thin-walled beltlike unit 7 fed into the heating chamber 1 is converted into a state of decreasing rate of drying and hot air is fed from a hot air feeder 2 into the heating chamber 1 to evaporate the treating agent. The resultant produced vapor is then passed through a duct 3 equipped with a discharge rate regulating means 5 and discharged to heat-treat the thin-walled beltlike unit while controlling the heater in conformity with the conditions of produced fouling gases sensed with the fouling sensor 8.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a heating device such as a heat set or a drying device that continuously heats a thin strip of cloth or the like.

[Prior art]

In a drying device, which is an example of a heating device, a cloth containing moisture and a processing agent such as an auxiliary agent or wax is continuously run in a drying chamber (heating chamber), and the moisture is dried by hot air supplied into the drying chamber. The processing agent is also calculated.

A humidity sensor is provided in the drying chamber to detect the humidity in the drying chamber, and a humidity sensor is installed on a duct communicating with the drying chamber in accordance with the humidity in the drying chamber detected by the humidity sensor. The opening degree of the valve (exhaust volume adjusting means) is controlled, and the water irises in the drying chamber are exhausted through the duct.

In this case, as the humidity sensor, for example, a polymer thin film sensor or the like is used.

On the other hand, in place of the humidity sensor as described above, a system in which a pollution sensor is provided on the duct has also been proposed.

The contamination sensor is for detecting the degree of contamination of the contaminant gas generated by the evaporation of the processing agent, and uses, for example, an optical infrared sensor.

In this case, the reason why the pollution sensor is arranged on the duct is to simplify the installation work.

[Problem to be solved by the invention]

By the way, in the drying apparatus equipped with the above-mentioned contamination sensor, as mentioned above, the contamination sensor is installed on a duct away from the cloth traveling position, considering only the ease of installation work. However, it is not possible to accurately and quickly grasp the vaporization status of the treatment agent from the cloth.

Therefore, it is not possible to appropriately and quickly control the opening degree of the valve according to the state of generation of contaminated gas in the drying chamber.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a heating device in which the location of the contamination sensor is taken into consideration so that the heating device can be quickly controlled in accordance with the generation status of contaminated gas.

[Means for Solving Problems] In order to achieve the above object, the main means adopted by the present invention is to continuously run a thin strip containing a processing agent in a heating chamber equipped with a contamination sensor. and evaporate the processing agent with hot air supplied into the heating chamber,
In a heating device in which the heat generated here is exhausted through a duct equipped with an exhaust amount adjusting means, the contamination sensor is located near the exit of the heating chamber, and the thin band-shaped body transitions to a state of lapse rate drying. This is a heating device that is provided corresponding to a portion that is heated.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples embodying the present invention will be described below with reference to the accompanying drawings to provide an understanding of the present invention. It should be noted that the following examples are examples embodying the present invention, and are not intended to limit the technical scope of the present invention.

Here, FIG. 1 shows a schematic configuration of a drying apparatus according to an embodiment of the present invention. FIG. 3 is a block diagram of a valve control system according to another embodiment that can be applied to the above drying apparatus, and FIG. 4 is a graph showing temperature changes in the drying chamber. It is.

In the drying apparatus according to this embodiment, FIGS.
As shown in FIG. 1, a hot air supply device 2 for supplying hot air into the drying chamber 1 is connected to the drying chamber 1 (heating chamber). An exhaust duct 3 is connected to the upper part of the drying chamber 1, and a valve 5 (exhaust volume adjusting means) whose opening degree is controlled by an actuator 4 such as a motor is provided in the duct 3. has been done. As this displacement adjustment means,
In place of the valve 5, a damper or an exhaust fan may be used.

Furthermore, a humidity sensor 6 is provided above the drying chamber 1 to detect the humidity inside the drying chamber 1.

Outlet 1 in the drying chamber 1. This is the area in the vicinity where the cloth 7 transitions to the state of lapse rate drying (the area indicated by arrow A in Figure 4), where the vaporization of the treatment agent is most accelerated and the largest amount of pollutant gas is generated. This is a region where the moisture in the cloth 7 is almost completely evaporated and the temperature of the cloth 7 tends to rise, and even in liquids outside the water, this region varies depending on the properties of the liquid. The contamination sensor 8 is provided in correspondence to the area indicated by arrow B, which is called constant rate drying. The contamination sensor 8 is for detecting the degree of contamination caused by the vaporized processing agent, and is, for example, an optical infrared sensor.

Normally, the running speed of the cloth 7 is set to a required maximum temperature (for example, 120°C to 130°C) at the exit 1a from an economical point of view.
Since the settings are made so as to obtain the above exit 1. The vicinity and the region transitioning to lapse rate drying are female.

FIG. 2 shows a block diagram of the control system of the actuator 4.

That is, the output value from the humidity sensor 6 and the set value from the humidity setting device 9 are compared to determine the control amount by the controller 10. The control amount determined by the controller IO is outputted to the inverter 12 through the switch circuit 11, and the drying i detected by the humidity sensor 6 is
The opening degree of the valve 5 is controlled depending on the humidity inside the chamber.

On the other hand, the output value from the pollution sensor 8 and the pollution level setting device 1
The control amount by the controller 14 is determined by comparison with the set value from 3. The control amount determined by the controller 14 is transmitted to the inverter 1 through the switch circuit 15.
The degree of opening of the valve 5 is controlled in accordance with the degree of contamination in the drying chamber 1 detected by the contamination sensor 8.

In the same figure, reference numeral 16 and 17 are amplifiers, which serve to level the control amount based on the output value from the humidity sensor 6 and the control amount based on the output value from the pollution sensor 8 so that they can be compared at the same level. In this case, if the output value from the humidity sensor 6 and the output value from the pollution sensor 8 are at the same reference level from the beginning, the amplifiers 16 and 17 as described above
etc. can be omitted.

Each control amount leveled by the amplifiers 16 and 17 is
It is output to the upper limit controller 18 and controller 19.

The upper limit controller 18 determines whether the humidity and the degree of contamination have exceeded the upper limit that must not be exceeded, that is, the value at which water droplets or processing agents begin to drip when water vapor or contaminated gas reaches a saturated state in the drying chamber 1. If the upper limit value is exceeded, the actuator 4 should be controlled by the control amount based on the detected value from the humidity sensor 6 or pollution sensor 8 that exceeds the upper limit value (or the switch circuit 11 or Turn on any one of 15.

In this case, when any of the control amounts exceeds the upper limit value, a control signal may be output directly to the inverter 12 to cause the actuator 4 to fully open the valve 5.

If none of the control amounts exceeds the upper limit, the controller 19 operates according to a predetermined priority, that is, according to the control amount based on the humidity sensor 6 or the control amount based on the pollution sensor 8. In order to control the actuator 4, it serves to turn on either the switch circuit 11 or 15.

The drying apparatus according to this embodiment is configured as described above.

Therefore, in the device, initially, for example, the humidity sensor 6
For example, if the valve 5 is controlled to open or close according to the control amount based on
When the cloth 7 stops running in the drying chamber 1, the temperature in the drying chamber 1 starts to rise because the cloth 7 becomes over-dry and no new cloth containing moisture is supplied to the drying chamber 1. . Then, the vaporization of the processing agent adhering to the walls and cloth in the drying chamber 1 is further activated, and the concentration of the contaminant gas in the drying chamber 1 increases.

However, in this device, the high concentration state of the contaminated gas is accurately and quickly detected by the contamination sensor 8, and the upper limit controller 18 is activated, so that the switch circuit 1
1 is turned off and the switch circuit 15 is turned on. As a result, the actuator 4 is suitably and quickly controlled by the control amount based on the contamination sensor 8, and the opening degree of the valve 5 is controlled in accordance with the degree of contamination in the drying chamber 1. Dripping of the processing agent is effectively prevented. In this case, the control may be unconditionally switched to control by the contamination sensor 8 when the cloth stops running.

On the other hand, the control amount based on the contamination sensor 8 causes the valve 5 to
When the humidity in the drying chamber 1 increases excessively, the switch circuit 11.15 is switched by the action of the upper limit controller 18, and the control amount based on the humidity sensor 6 causes Since the opening degree of the valve 5 is controlled, water droplets falling onto the cloth 7 are also effectively prevented.

As described above, according to the apparatus of this embodiment, the opening degree of the valve 5 is appropriately and quickly adjusted depending on the state of water evaporation and the vaporization state of the processing agent, so that the processing agent is not applied to the cloth 7. Dripping and falling of water droplets are prevented, and the cloth 7 can be dried in a high quality state.

In addition, in the drying apparatus according to the present invention, as shown in FIG. The upper limit controller 18 may be controlled based on the above.

Furthermore, in this embodiment, if it is known in advance that the cloth has extremely low moisture content and has a large amount of treatment agent attached, it is possible to switch from the beginning to perform control based on the contamination sensor 8. It is also possible to configure

As described above, by configuring the opening degree of the valve 5 to be automatically adjusted based on the detection data from the hot water temperature sensor 6 and the contamination sensor 8, the valve 5 can be controlled in the case of manual control. This eliminates individual variations among operators, making it possible to always perform optimal control and dry cloth in a high-quality state. At the same time, the operator is freed from the need for constant monitoring, and the overall system can be operated with less labor.

Furthermore, in the device of this embodiment, it is also possible to configure the processing functions of the system, including the upper limit controller 18 and other controllers, to be carried out by a single CPU or a plurality of CPUs.

〔Effect of the invention〕

As described above, the present invention continuously runs a thin strip containing a processing agent in a heating chamber equipped with a contamination sensor, evaporates the processing agent with hot air supplied into the heating chamber, and generates steam. In the heating device, the contamination sensor is arranged to correspond to a portion near the exit of the heating chamber where the thin strip material transitions to a state of lapse rate drying. Since the heating device is characterized in that it is provided with a heating device, it is possible to control the heating device appropriately and quickly in accordance with the situation of generation of pollutant gas.

[Brief explanation of drawings]

FIG. 1 shows a schematic configuration of a drying device according to an embodiment of the present invention, in which ial is a side view, FIG. 2 is a plan view, and FIG. FIG. 3 is a block diagram of a valve control system according to another embodiment applicable to the above drying apparatus, and FIG. 4 is a graph showing temperature changes in the drying chamber. Explanation of symbols] l...Drying chamber (heating chamber) 18...Outlet 2...
・Hot air supply device 3... Duct 4... Actuator 5... Valve (exhaust volume adjustment means) 6... Humidity sensor 7... Cloth 8... Contamination sensor 9... Humidity setting device 0 .14.19・
... Controller 1.15 ... Switch circuit 3 ... Pollution degree setting device 6.17 ... Amplifier 8 ... Upper limit controller

Claims (1)

[Claims] 1. A thin strip containing a processing agent is continuously run in a heating chamber equipped with a contamination sensor, the processing agent is evaporated by hot air supplied into the heating chamber, and the vapor generated here is equipped with an exhaust amount regulating means. The heating device is characterized in that the contamination sensor is provided in the vicinity of the outlet of the heating chamber and corresponding to a portion where the thin strip-shaped body transitions to a state of lapse rate drying. heating device.