JPH0676979B2 - Humidity detector - Google Patents

Description

TECHNICAL FIELD The present invention relates to a humidity detector having a detection unit for detecting humidity in an atmosphere.

[Prior Art] For example, in a coloring step at the time of dyeing and finishing a fiber, a cloth is steamed in a steamer to dye a dye on the cloth to develop a color.

The ambient temperature inside the steamer is maintained at about 100 ° C,
The relative humidity is controlled so as to have a predetermined high temperature and high humidity value of around 100%. This is because the humidity inside the steamer is a major factor in determining the color development state of the product.

Therefore, as a humidity detector capable of detecting the humidity inside the steamer with high accuracy, for example, one shown in FIG. 2 is known.

In the figure, 1 is a detection unit for directly detecting the humidity in the steamer by directly contacting with water vapor, which is composed of, for example, a polymer thin film sensor, and a tip of a supporting member 2 protruding in the steamer. For the support member 2 attached to the portion, for example, Teflon having low thermal conductivity and heat resistance is used.

In addition, as the above-mentioned detection unit, there is a ceramic sensor or the like.

[Problems to be Solved by the Invention]

However, in the conventional humidity detector, heat escapes to the wall of the steamer through the support member 2, and the polymer thin film sensor 1
The temperature of itself tends to drop. Since this humidity detector is used in a predetermined high temperature and high humidity atmosphere having a temperature of about 100 ° C. and a relative humidity of about 100%, even if the temperature in the steamer is slightly lowered, the polymer thin film sensor 1 There was a problem that dew condensation occurs on the surface of.

This is a very unfavorable situation because the detection part of this kind such as the polymer thin film sensor 1 has a structurally low wet resistance, and if it is left wet for a long time, its life becomes extremely short.

Therefore, an object of the present invention is to increase the temperature around the detection unit to prevent dew condensation on the surface of the detection unit, to extend the life of the detection unit, and to reduce the temperature around the detection unit. Even if the value of the relative humidity in the vicinity of the detection unit detected by the detection unit changes due to the rise, the relative humidity in the required atmosphere can be accurately detected and the humidity management can be performed accurately and easily. It is to provide a humidity detector capable of performing.

[Means for Solving the Problems]

The main means adopted by the present invention to achieve the above object, the gist thereof is, in a humidity detector having a detection unit for detecting the humidity in a hot and humid atmosphere, the temperature around the detection unit. Is provided to prevent dew condensation on the detection unit, the relative humidity value near the detection unit detected by the detection unit, the temperature state near the detection unit, and the atmosphere. The humidity detector according to claim 1, further comprising a humidity measuring converter for calculating the value of the relative humidity at the predetermined location from the relationship of the temperature condition of the predetermined location.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. The following examples are examples of embodying the present invention and are not of the nature to limit the technical scope of the present invention.

FIG. 1 is a side view of the humidity detector according to the embodiment of the present invention in a partially broken state.

Further, the elements common to those of the conventional apparatus shown in FIG.

In the humidity detector according to this embodiment, as shown in FIG.
A cylindrical tube 3 made of, for example, Teflon is provided at the tip of the support member 2 so as to wrap around the polymer thin film sensor 1, and a coil-shaped heater 4 is provided on the peripheral surface of the tube 3. (Heating means) is attached. The heater 4 raises the temperature around the polymer thin film sensor 1 to prevent dew condensation on the surface of the polymer thin film sensor 1.

A temperature detector 5 for detecting the temperature around the polymer thin film sensor 1 is provided inside the cylinder 3, and an output signal from the temperature detector 5 is output from the polymer thin film sensor 1. Output signal from the temperature detector 6 and the output signal from the temperature detector 6 for detecting the ambient temperature at a predetermined location in the steamer (the location showing the distribution of average temperature and humidity required in the steamer space). It is input to the measurement converter 7.

The humidity measuring converter 7 is configured to have a microcomputer, a memory, various interfaces, etc., and based on the input signals from the polymer thin film sensor 1 and the temperature detectors 5 and 6, the humidity measuring converter 7 This is for calculating the relative humidity at a predetermined location.

The humidity detector according to this embodiment is configured as described above.

Next, a procedure for measuring the relative humidity in the steamer using the humidity detector having the above configuration will be described.

Atmospheric temperature in the steamer is 100 ℃, relative humidity is 99
%, When the water vapor is extremely close to the saturated state (at this time, the absolute humidity around the temperature detectors 5 and 6 is equal), when the polymer thin film sensor 1 is inserted into the steamer, heat is affected by heat radiation. The temperature of the surface of the tip of the polymer thin film sensor 1 drops to, for example, 98 ° C., and a measurement state in which dew condensation easily occurs is obtained. If condensation occurs on the surface of the polymer thin film sensor 1 for some reason, measurement becomes impossible.

In the present invention, in order to avoid the condition of occurrence of this condensation,
The temperature only around the polymer thin film sensor 1 is, for example, 100.
The heating of the heater 4 is controlled by the humidity measuring converter 7 so that the heater 4 has a value within the range of 105 ° C. As a result, the relative humidity around the polymer thin film sensor 1 apparently decreases.

Therefore, no condensation occurs on the surface of the polymer thin film sensor 1.

However, in this case, the humidity control actually required is relative humidity with respect to the temperature around the predetermined location in the steamer, that is, the temperature detector 6, and therefore the polymer thin film sensor 1
It is necessary to convert the value of the relative humidity measured by the above into a value corresponding to the temperature around the temperature detector 6.

Therefore, assuming that the absolute humidity in the temperature detectors 5 and 6 is the same, the measured value of the polymer thin film sensor 1 is automatically converted by the humidity measuring converter 7, so that The value of relative humidity in the steamer is calculated.

Therefore, by measuring the relative humidity in the steamer using the humidity detector having the above configuration, it is possible to prevent dew condensation on the surface of the polymer thin film sensor 1. as a result,
It is possible to extend the life of the polymer thin film sensor 1. Further, the humidity measuring converter 7 can accurately and easily perform the humidity control actually required in the steamer.

In the humidity detector in the above-mentioned embodiment, it is not necessary to calculate the absolute humidity value each time in order to measure the relative humidity in the steamer, and each value and temperature of the polymer thin film sensor 1 and the temperature detector 5 are measured. It is also possible to immediately calculate the value of the relative humidity in the steamer from the relationship with the value of the detector 6.

Furthermore, in the humidity detector according to the present embodiment, the relationship between the respective values of the polymer thin film sensor 1 and the temperature detector 5 and the value of the relative humidity in the steamer (around the temperature detector 6) is known in advance. In this case, based on the relationship, the temperature around the polymer thin film sensor 1 has a predetermined value (polymer thin film sensor 1
The heater 4 may be manually controlled by, for example, an operator so as to correspond to the measurement value of the temperature detector 6 so that the temperature can prevent dew condensation on the surface of the heater.

In the above embodiment, the case where the humidity detector according to the present invention is provided in the steamer used for dyeing and finishing has been described as an example. It goes without saying that it can be applied to humidity control in the process.

〔The invention's effect〕

The present invention, as described above, in a humidity detector having a detection unit for detecting the humidity in a hot and humid atmosphere,
A heating means for raising the temperature around the detection unit is provided to prevent dew condensation on the detection unit, and the relative humidity value near the detection unit detected by the detection unit and the detection unit. Since it is a humidity detector characterized in that it has a humidity measuring converter for calculating the value of the relative humidity at the predetermined location from the relationship between the temperature conditions in the vicinity and the temperature status of the predetermined location in the atmosphere, It is possible to prevent dew condensation on the surface of the part and extend the life of the detecting part.

Further, even if the value of the relative humidity in the vicinity of the detection part detected by the detection part changes by raising the temperature around the detection part in order to prevent dew condensation on the detection part, it is possible that The relative humidity can be accurately detected, and the humidity can be controlled accurately and easily.

[Brief description of drawings]

FIG. 1 is a side view of a humidity detector according to an embodiment of the present invention in a partially broken state, and FIG. 2 is a side view showing a configuration of a conventional humidity detector. [Explanation of symbols] 1 ... Polymer thin film sensor (detection unit) 4 ... Heater (heating means). 7 ... Humidity measuring converter.

Claims (1)

[Claims] 1. A humidity detector having a detection unit for detecting the humidity in a hot and humid atmosphere, wherein heating means for raising the temperature around the detection unit is provided, and dew condensation on the detection unit is provided. While preventing, the relative humidity value in the vicinity of the detection unit detected by the detection unit and the relative humidity in the predetermined position from the relationship between the temperature state in the vicinity of the detection unit and the temperature state of the predetermined position in the atmosphere A humidity detector comprising a humidity measuring converter for calculating a value.