JP7139278B2 - Environmental test equipment and humidity detector - Google Patents

Description

The present invention relates to a humidity detector for measuring the wet-bulb side temperature of a wet-bulb hygrometer. The present invention also relates to an environmental test apparatus capable of creating a desired environment in a test room.

An environmental test apparatus is known as an apparatus for testing the performance and durability of products, materials, etc. (Patent Document 1). Some environmental test apparatuses have a test chamber in which a specimen to be tested is placed, and can adjust the temperature and humidity in the test chamber to a desired environment.
Some environmental test apparatuses are provided with a temperature sensor and a humidity sensor, and some control air conditioners so that the detected values of the temperature sensor and the humidity sensor approach the temperature and humidity of the set environment.

One type of hygrometer is called a wet-bulb hygrometer.
A dry-bulb hygrometer measures the temperature on the dry-bulb side by measuring the temperature with the temperature-detecting part in a dry state, and measures the temperature on the wet-bulb side by measuring the temperature with the temperature-detecting part in a moist state, and compares the two. It detects relative humidity.
The terms "dry bulb" and "wet bulb" are remnants of the days when bar thermometers were used as temperature sensors, and "sphere" means the temperature measuring part. That is, in recent years, thermocouples and temperature measuring resistors are sometimes used as temperature sensors because it is necessary to convert the temperature into an electric signal for detection. Thermocouples and resistance temperature detectors often do not have a “ball” shaped member, and the temperature detection part corresponds to a “dry bulb” or “wet bulb”.

A wet-bulb hygrometer originally consists of a set of a dry-bulb temperature sensor and a wet-bulb temperature sensor. There are many. Therefore, a member that simply measures the wet-bulb temperature is sometimes called a humidity sensor or a humidity detector.
Following this example, a device for measuring the wet-bulb side temperature is referred to as a humidity detector in this specification.
As an example of the humidity detection device, there is a device that covers the temperature detection part of the temperature sensor with a cloth (wick) soaked with water and detects the temperature of the test room or the like in that state.
That is, it has a water reservoir for storing water, and the end of the wick is immersed in the water reservoir, sucks up water using capillary action, and moistens the temperature detection part. Then measure the temperature in this state.

JP 2014-66593 A

In the above-described humidity detection device, it is necessary to keep the wick wet with water at all times. However, the prior art has the problem that it is difficult to detect the wetness of the wick during the environmental test.
That is, although the wick must be kept moist at all times as described above, there are cases where the water in the water reservoir dries up and the wick dries up. In addition, the wick may deteriorate and may not be able to sufficiently moisten the temperature detection part. Therefore, it may become impossible to detect the exact wet-bulb side temperature.
In the prior art, there was a problem that even if such a situation occurred during the execution of the environmental test, it would be difficult to know it.
SUMMARY OF THE INVENTION An object of the present invention is to address the above-described problems of the prior art, and to propose a humidity detector capable of detecting the state of the humidity detector.

An aspect for solving the above-described problems is a humidity detection device that has a water reservoir for storing water and a temperature sensor, and detects a wet-bulb side temperature by attaching a wick to the temperature sensor, wherein the temperature sensor is: It comprises a conductive protective tube, forms an electrical conduction path from the wick attached to the temperature sensor through the protective tube, and has an electrical characteristic detection means for detecting electrical characteristics of the electrical conduction path. A humidity detector characterized by
A specific embodiment for solving the above-described problems is a humidity detection device that has a water reservoir for storing water and a temperature sensor, and detects a wet-bulb side temperature by attaching a wick to the temperature sensor, wherein the temperature The sensor includes a conductive protective tube, forms an electrical conduction path from the wick attached to the temperature sensor through the protective tube, and detects electrical characteristics of the electrical conduction path. The temperature sensor has a wick bridging area for hanging the wick, a temperature measuring part is positioned in the wick bridging area, and an insulating member is provided in a part of the protective tube located in the wick bridging area. It is a humidity detection device characterized by being arranged.

Here, the electrical properties are, for example, electrical resistance, electrical conductivity, impedance, amount of current, voltage across both ends, and the like.
The humidity detection device of this aspect is a device for measuring the wet-bulb side humidity of a wet-bulb hygrometer.
The humidity detection device of this embodiment has a water reservoir for storing water and a temperature sensor, and is used by attaching a wick to the temperature sensor, as in the case of a known humidity detection device. The temperature sensor also has a conductive protective tube.
The humidity detection device of this aspect has electrical property detection means, and the electrical property of the electrical conduction path from the wick to the protective tube is detected by the electrical property detection means.
If there is water in the water reservoir and the wick is wet with water, the electrical conduction path is opened and current flows, thereby exhibiting predetermined electrical characteristics. For example, a predetermined electrical resistance value is indicated or a predetermined voltage across the terminals is generated.
On the other hand, if the water in the water reservoir dries up or if the wick is damaged, the electrical characteristics of the electrical conduction path described above change. For example, electrical resistance increases. Therefore, it is possible to indirectly know the degree of wetness and damage to the wick from changes in the resistance value and the like.

In the above aspect, it is preferable that an electrode is arranged in the water reservoir and the electrical characteristics between the electrode and the protective tube are detected.

According to this aspect, the electrical characteristics of the electrical conduction path from the wick to the protective tube can be detected more accurately.

Another aspect for solving a similar problem is a humidity detection device that has a water reservoir for storing water and a temperature sensor, and detects the wet-bulb side temperature by passing a wick over the temperature sensor, wherein the temperature The sensor comprises a protective tube having conductivity, the water reservoir and/or the water reservoir has a conductive section therein, and electrical property detection means for detecting electrical properties between the conductive section and the protective tube. A humidity detector characterized by
A specific aspect for solving the above-described problems is a humidity detection device that has a water reservoir for storing water and a temperature sensor, and detects the wet-bulb side temperature by passing a wick over the temperature sensor. The sensor includes a conductive protective tube, the water reservoir and/or a conductive section in the water reservoir, and electrical property detection means for detecting electrical properties between the conductive section and the protective tube. The temperature sensor has a wick bridging area on which the wick is hung, a temperature measuring part is positioned in the wick bridging area, and an insulating member is disposed on a part of the protective tube located in the wick bridging area. The humidity detection device is characterized by:

The humidity detection device of this aspect can also detect the electrical characteristics of the electrical conduction path from the wick to the protective tube.

In the above-described aspect, the temperature sensor has a wick bridging area over which the wick is hung, the temperature detection part is positioned in the wick bridging area, and the insulating member is part of the protective tube located in the wick bridging area. are distributed .

Generally, in a temperature sensor in which a thermocouple or a resistance temperature detector is housed in a protective tube, a heat sensitive part such as a thermocouple is built in a part of the protective tube. For example, the heat sensitive part of a thermocouple is a junction of dissimilar metals, and the heat sensitive part of a temperature sensing resistor is the temperature sensing resistor itself, but these are housed in a partial area of the protective tube. Therefore, in a temperature sensor having a protective tube, the actual temperature detection part (area around the heat sensitive part) may be limited to a part of the protective tube.
When the protective tube is made of metal, all parts of the protective tube are conductive, and current flows through the protective tube via the wick without passing through the temperature detection part, and exhibits predetermined electrical characteristics. there is a possibility.
In the humidity detection device of this aspect, since the protective tube is provided with the insulating member, the electrical conduction path passes through the temperature detection section, and the state of the humidity detection device can be detected more accurately.

In the above-described aspect, the temperature sensor is rod-shaped, the temperature sensor is cantilevered and held in a substantially horizontal position, the temperature sensor has a wick passing area on which the wick is passed, and the wick is passed. It is desirable that a signal line for detecting the electrical characteristics is attached at a position out of the area.

In the humidity detection device of this aspect, the temperature sensor has a wick passing area, and the signal line is attached at a position outside the wick passing area.
Therefore, the signal line does not get in the way when the wick is applied.

In the above aspect, it is desirable to give a predetermined notification when the electrical characteristic satisfies a predetermined condition.

According to this aspect, an abnormality such as a wick can be detected.

A mode related to an environmental test apparatus has a test room in which a specimen is placed, an air conditioner that adjusts the humidity in the test room, and the humidity detection device according to any one of the above, and at least the humidity detection device detects The environmental test apparatus is characterized in that the air conditioner is controlled based on the wet-bulb side temperature.

According to this aspect, an abnormality or the like of the humidity detection device can be detected during the environmental test.

According to the humidity detection device of the present invention, it is possible to detect the state of the humidity detection device. Further, according to the environmental test apparatus of the present invention , it is possible to detect an abnormality of the humidity detector during the execution of the environmental test.

BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing which showed notionally the environmental test apparatus of embodiment of this invention. It is a perspective view of the humidity detection device of this embodiment. FIG. 3 is a cross-sectional view of a temperature sensor employed in the humidity detection device of FIG. 2; 3 is an enlarged cross-sectional view of the humidity sensing device of FIG. 2; FIG. FIG. 4 is a cross-sectional view of a humidity detection device according to another embodiment of the present invention; FIG. 4 is a cross-sectional view of a humidity detection device according to still another embodiment of the present invention;

Embodiments of the present invention will be further described below.
The environmental test apparatus 1 of this embodiment has a characteristic humidity detector 13 . Prior to describing the characteristic configuration, an outline of the environmental test apparatus 1 will be described.
As shown in FIG. 1, the environmental test apparatus 1 has a test chamber 5 in which a specimen 18 is arranged, and the inside of the test chamber 5 can be adjusted to a desired temperature and humidity environment.
The environmental test apparatus 1 has a heat insulating tank 3 covered with a heat insulating wall 2 . A test chamber 5 is formed in a part of the heat insulating bath 3 . The test chamber 5 is a space in which the specimen 18 is installed. A door 21 is provided in front of the test chamber 5 .
The environmental test apparatus 1 further includes an air conditioner 17 and a blower 10 . The air conditioner 17 is composed of a humidifying device 6 , a cooling device 7 and a heating device 8 .

The environmental test apparatus 1 has an air-conditioning ventilation path 15 annularly communicating with the test chamber 5 , and the air-conditioning equipment 17 and the blower 10 are built in the air-conditioning ventilation path 15 .

The air-conditioning ventilation path 15 is formed in a part of the heat insulating tank 3 and communicates with the test chamber 5 at two points, an air blowing portion 16 and an air introducing portion 20 .
Therefore, when the blower 10 is started, the air in the test chamber 5 is introduced into the air-conditioning ventilation passage 15 from the air introduction section 20 . Then, the air-conditioning ventilation path 15 is in a ventilated state, the air comes into contact with the air-conditioning equipment 17 to perform heat exchange and humidity adjustment, and the adjusted air is blown into the test chamber 5 from the air blowing section 16 .
A temperature sensor 12 and a humidity detector 13 are provided in the vicinity of the air blowing portion 16 of the air conditioning ventilation passage 15 . This embodiment has an arithmetic unit (not shown), and relative humidity is calculated using the temperature detected by the temperature sensor 12 as the dry-bulb temperature and the temperature detected by the humidity detector 13 as the wet-bulb temperature.
When the environmental test apparatus 1 is used, the air blower 10 is operated to create a ventilation state in the air conditioning ventilation path 15, and the temperature detected by the temperature sensor 12 and the humidity obtained by calculation are the temperature and humidity of the set environment. The air conditioner 17 is controlled so as to approach

That is, by operating the blower 10, the air in the test chamber 5 is introduced from the air introduction section 20 into the air-conditioning ventilation passage 15, passes through the air-conditioning equipment 17 in the air-conditioning ventilation passage 15, and the temperature and humidity are adjusted. Then, the air whose temperature and humidity have been adjusted is returned to the test chamber 5 from the air blowing section 16 to create an environment with desired temperature and humidity in the test chamber 5 .

Next, the temperature sensor 12 and the humidity detection device 13 will be explained.
In this embodiment, a temperature sensor 12 and a humidity detection device 13 are provided in the vicinity of the air blowing portion 16 of the air conditioning ventilation passage 15 . The temperature sensor 12 is a conventionally known temperature sensor such as a thermocouple or a thermistor.
The humidity detector 13 detects the wet bulb temperature. As described above, the dry-bulb side temperature detected by the temperature sensor 12 and the wet-bulb side temperature detected by the temperature sensor 28 (see FIG. 2) of the humidity detection device 13 are input to a control device (not shown), and the difference between the two is Humidity is calculated from

The humidity detection device 13 detects the wet bulb temperature as described above, and constitutes a part of the humidity detection means.
The humidity detection device 13 has a wet-bulb temperature sensor 28, as shown in FIG. To distinguish from the temperature sensor 12 that measures the dry-bulb temperature, the temperature sensor attached to the humidity detector 13 is called a wet-bulb temperature sensor 28 .
The humidity detection device 13 further has a wick 25 covering the wet-bulb temperature sensor 28 and a detection water reservoir 37 . A water reservoir 23 is provided in the detection water reservoir 37 .
The water reservoir 23 is a member called a wick pan, and is a container for storing water.

The wet-bulb temperature sensor 28 is a rod-shaped temperature sensor using a thermocouple, a temperature measuring resistor, or the like.
The wet-bulb temperature sensor 28 employed in this embodiment is called a sheathed thermocouple, and a thermocouple heat-sensitive portion 31 is built in a protective tube 30 as shown in FIG. The protective tube 30 is a tube made of metal such as stainless steel and has electrical conductivity.
The heat-sensitive portion 31 of the thermocouple described above is located at the tip portion of the protective tube 30 , and the tip portion of the protective tube 30 serves as the temperature-detecting portion 26 of the wet-bulb temperature sensor 28 .
That is, the heat-sensitive portion 31 of the thermocouple is located at the tip of the protective tube 30, and the lead wire 22 is inserted through the protective tube 30 and protrudes from the proximal end side of the protective tube 30. As shown in FIG. The inside of the protective tube 30 is filled with powder (not shown).

In this embodiment, an insulating layer 32 is formed around the protective tube 30 . The insulating layer 32 is, for example, a tube made of insulating paint or insulating material, and surrounds the intermediate portion of the protective tube 30 . In other words , the insulating layer 32 is provided in the region of the protective tube 30 excluding the vicinity of the distal end and the proximal end.
The humidity detection device 13 dips a part of the wick 25 in the water in the water reservoir 23 of the detection water reservoir 37, and brings the other part of the wick 25 into contact with the wet-bulb temperature sensor 28 to measure the wet-bulb side temperature. It detects.

The wick 25 is a sheet of cloth or gauze capable of retaining moisture. The wick 25 may be of any type as long as it can evaporate the retained moisture according to the environment such as ambient temperature and ambient humidity.

The detection water reservoir 37 has a water reservoir 23 .
The water reservoir 23 has a recessed portion with an open top, and can store water in the recessed portion. Water is supplied to the water reservoir 23 from a water supply channel (not shown). Excess water is drained.

The wet-bulb temperature sensor 28 is fixed above the detection water reservoir 37 by a support means (not shown).
The wet-bulb temperature sensor 28 is cantilevered and supported horizontally. That is, the base end side of the protective tube 30 is supported, and the tip temperature detection portion 26 is on the free end side.
A wick 25 is hooked on the wet-bulb temperature sensor 28 , and the end of the wick 25 is hung in the water reservoir 23 . A region above the water reservoir 23 of the protective tube 30 serves as a wick spanning region 36 .
In this embodiment, the insulating layer 32 is formed around the protective tube 30 as described above. The area where the insulating layer 32 is provided includes the entire area of the wick bridging area 36 excluding the temperature measuring portion 26 .

A wick 25 is hooked on a wick bridging region 36 of the protective tube 30 .
The wick 25 is made by folding gauze or the like in half, and the folded portion (crotch portion) in the folded state is hooked on the wick spanning region 36 of the wet-bulb temperature sensor 28 . A hanging part hanging down from the bottom is immersed in the water in the water reservoir part 23. - 特許庁The wick 25 sucks up water by capillary action, and wets the area including the temperature measuring part 26 of the wet-bulb temperature sensor 28 .

As a characteristic configuration of the humidity detection device 13 of the present embodiment, an electrode (conductive portion) 50 is arranged in the water reservoir 23 of the detection water reservoir 37 . A signal line 51 is attached to the electrode 50 .
A signal line 52 is attached near the proximal end of the protective tube 30 of the wet-bulb temperature sensor 28 . A signal line 51 on the electrode 50 side and a signal line 52 on the protective tube 30 side of the wet-bulb temperature sensor 28 are connected to the electrical characteristic detection means 60 .
Here, the electrical characteristic detection means 60 is a device for measuring electrical resistance, and measures the resistance by passing a weak electric current between the signal lines 51 and 52 .

That is, there is water in the water reservoir 23 and the electrode 50 is immersed in the water in the water reservoir 23 . A portion of the wick 25 is immersed in the water in the water reservoir 23, and the wick 25 contains water due to capillary action.
Furthermore, the wick 25 spans over the protective tube 30 of the wet-bulb temperature sensor 28 . Here, although the protective tube 30 is made of metal, most of the protective tube 30 is covered with an insulating layer 32 and is not electrically conductive. However, there is no insulating layer 32 in the temperature detecting portion 26 at the tip of the protective tube 30, and the protective tube 30 is exposed. A portion of the wick 25 covers the temperature detection portion 26 .
Therefore, a series of electrical conduction paths 40 (Fig. 4 ) is opened. Then, a weak current is passed through the series of electrical conduction paths 40 through the signal lines 51 and 52 from the electrical property detection means 60, and the resistance value of the electrical conduction paths 40 is measured.

Here, there is water in the water reservoir 23, the wick 25 is immersed in the water, the wick 25 is not damaged and contains sufficient water, and the wick 25 is in contact with the temperature measuring portion 26 at the tip of the protective tube 30. If so, electricity will flow in the series of electrically conductive paths 40 and the resistance will be relatively low.
On the other hand, when there is no water in the water reservoir 23 or when the amount of water is insufficient, the resistance value increases. The resistance value is also high when the wick 25 is damaged, torn, thinned, moldy, burnt, adhered with foreign matter, or the like.

Further, in the environmental test apparatus 1 of this embodiment, a comparison circuit is provided in the control device (not shown), and the detected resistance value is compared with a predetermined threshold value.
A plurality of threshold values are stored, for example, in the memory of the control device. For example, there are limit thresholds, deterioration criterion thresholds, and cautionary ventilation thresholds.
The limit threshold value is a threshold value indicating that the resistance value is infinite and the electrical conduction path 40 is in a disconnection state. The deterioration reference threshold value is a threshold value indicating that the resistance value of the electrical conduction path 40 is higher than the normal value, and that the wick 25 is suspected of being deteriorated such as a scratch or break, and that the deterioration has progressed considerably. The caution ventilation threshold is a threshold indicating that the wick 25 has deteriorated to some extent.

Further, the environmental test apparatus 1 of this embodiment includes a display device 61 having a display screen such as a liquid crystal screen, which compares the resistance value of the electrical conduction path 40 with a threshold value and gives necessary information.
For example, if the resistance value of the electrical conduction path 40 exceeds the limit threshold, there is a high possibility that humidity detection is not possible, so an alarm is displayed on the display device 61 to inform the user, and a predetermined amount of sound is given. is notified.

If the resistance value of the electrical conduction path 40 exceeds the deterioration reference threshold, the wick 25 may be damaged or the water in the water reservoir 23 may be insufficient. , a display (announcement) prompting confirmation of water supply is made.

If the resistance value of the electrical conduction path 40 exceeds the caution threshold value, the wick 25 may be damaged, so a display (notification) is provided to prompt confirmation.

The environmental test apparatus 1 of the present embodiment can monitor the progress of deterioration of the wick 25, shortage of water supply, and the like.
In addition, since the electrode is not directly attached to the wick 25, but the protection tube 30 of the wet-bulb temperature sensor 28 is used as a part of the conductor to monitor the electrical characteristics of the wick 25, separate work is required when replacing the wick 25. do not do.
In addition, since the signal line 52 is attached at a position outside the wick bridging area 36 of the protective tube 30, the signal line 52 does not become an obstacle when the wick 25 is replaced.
Also, since the protective tube 30 of the wet-bulb temperature sensor 28 is used as part of the lead wire, the number of parts is small.

In the embodiment described above, the electrode 50 is placed in the water reservoir 23, but the water reservoir 23 itself may be made conductive and the signal line 51 may be attached to the water reservoir 23. FIG. That is, the signal line 51 may be attached to the inner surface of the water reservoir 23 as a conductive portion.
For example, the water reservoir 23 may be molded with a resin, and a metal may be thermally sprayed inside to form the conductive portion. Alternatively, the water reservoir 23 itself may be made of metal and formed as a conductive portion.

FIG. 5 is a modified example of the present invention, showing a humidity sensing device 62 with a simple structure.
In the humidity detection device 62 shown in FIG. 5, a clip 63 is attached to the wick 25, and the clip 63 functions as a conductive portion. The signal line 51 described above is attached to the clip 63 .

In the embodiment shown in FIG. 5, the clip 63 is attached to the right vertical side of the wick 25 that is not submerged in water, but the attachment position of the clip 63 is not limited.
For example, the clips 63 may be attached to the vertical sides of the wick 25 that are immersed in water. A clip 63 may be attached to the lower edge of the wick 25 . A clip 63 may be attached near the bottom of the left side of the wick 25, in the middle, or on the top.

The clip 63 employed in the embodiment shown in FIG. 5 is a known eyeball clip. The structure of the clip 63 is not limited as long as it has elasticity and can clip the wick 25 . For example, an alligator mouth can also be used.
When the clip 63 is used as a conductive portion, it is desirable that the clip 63 is made of metal or the like and has conductivity.
The conductive portion attached to the wick 25 or the like is not limited to the clip 63, but may be a metal wire sewn into a portion of the wick 25 or an eyelet or pin attached to the wick 25 as a conductive portion. good too.
Alternatively, the tip of the signal line 51 may be stripped to be a bare wire, and the bare wire portion may be brought into contact with the wick 25 with the clip 63 . In this case, the end portion of the signal line 51 functions as a conductive portion.

The temperature detection part 26 of the wet-bulb temperature sensor 28 is often located at the tip of the protective tube 30 as shown in FIG. 3, but as shown in FIG. There may be a temperature detection part 26 in the middle part of.
As shown in FIG. 3, it is desirable that there is no insulating layer 32 around the temperature detecting section 26, but the insulating layer 32 may cover the temperature detecting section 26 as shown in FIG. It is desirable that an insulating layer (insulating member) 32 is disposed on a portion of the protective tube 30 located in the wick bridging region 36 and the protective tube 30 is exposed in a portion of the wick bridging region 36 .
It should be noted that it is not essential to have the insulating layer 32 on the surface of the protective tube 30, and the insulating layer 32 may be omitted.

In the above-described embodiment, the signal line 52 is attached near the proximal end of the protective tube 30 as shown in FIG. may have been For example, there may be a connecting portion for the signal line 52 within the test chamber 5 .
In the above-described embodiment, the signal wire 52 is connected to the outer peripheral side of the protective tube 30, but the signal wire 52 is connected to the inner peripheral surface of the protective tube 30, and the signal wire 52 is connected from the end of the protective tube 30. You can pull it out.
When the signal line 52 is connected to the inner peripheral surface of the protection tube 30, the connection position of the signal line 52 is arbitrary. For example, the signal line 52 may be connected to any position, such as a position near the base end of the protective tube 30, a position near the center, or a position near the temperature detection part.

It is desirable that the above-described threshold is not fixed, but changed according to the material, thickness, etc. of the wick 25 . Moreover, it is desirable to change according to the water quality of the water supplied to the water reservoir 23 .
For example, a test run may be performed immediately after the wick 25 is replaced with a new one, electrical characteristics during the test run may be stored, and each threshold value may be automatically set based on the stored electrical characteristics.

Further, when the resistance value of the electrical conduction path 40 is high to some extent, it is expected that the temperature detection part 26 will not be sufficiently wet, and that the evaporation of water from the temperature detection part 26 will be insufficient. Therefore, it is conceivable to automatically correct the detected humidity according to the resistance value.
For example, when the resistance value of the electrical conduction path 40 is high, water is not sufficiently evaporated from the temperature detection unit 26, so the temperature drop due to the heat of evaporation is low, and a temperature higher than the original wet bulb temperature is detected. expected to be As a result, the humidity detection means may erroneously detect that the humidity is lower than the actual humidity.
Therefore, when the resistance value of the electrical conduction path 40 is high, it is conceivable to automatically correct the detected humidity upward and control the air conditioner 17 .

1 Environmental test device 5 Test chamber 13 Humidity detection device 17 Air conditioner 23 Water reservoir 25 Wick 26 Temperature detection unit 28 Wet bulb temperature sensor 32 Insulation layer 36 Wick spanning region 37 Detection water storage unit 40 Electrical conduction path 50 Electrode (conductive member )
51, 52 signal line 60 electrical characteristic detection means

Claims (6)

A humidity detection device that has a water reservoir for storing water and a temperature sensor, and detects a wet-bulb side temperature by attaching a wick to the temperature sensor, wherein the temperature sensor includes a conductive protective tube, and the temperature is an electric property detection means for forming an electric conduction path from the wick attached to the sensor through the protection tube and detecting electric properties of the electric conduction path ;
The temperature sensor has a wick passing area for hanging the wick,
A temperature measuring part is located in the wick crossing area,
A humidity detector according to claim 1, wherein an insulating member is arranged in a portion of the protective tube located in the wick spanning region . 2. A humidity detection device according to claim 1, wherein an electrode is arranged in said water reservoir, and said electrical characteristic between said electrode and said protective tube is detected. A humidity detection device that has a water reservoir for storing water and a temperature sensor, and detects a wet-bulb side temperature by passing a wick over the temperature sensor, wherein the temperature sensor includes a protective tube having conductivity, and the water reservoir. There is a conductive part in the part and / or the water reservoir part, and has an electrical characteristic detection means for detecting an electrical characteristic between the conductive part and the protective tube,
The temperature sensor has a wick passing area for hanging the wick,
A temperature measuring part is located in the wick crossing area,
A humidity detector according to claim 1, wherein an insulating member is arranged in a portion of the protective tube located in the wick spanning region . The temperature sensor is rod-shaped, the temperature sensor is cantilevered and held in a substantially horizontal posture, and the temperature sensor has a wick passing area on which the wick is hung, and is positioned away from the wick passing area. 4. The humidity detection device according to claim 1 , wherein a signal line for detecting said electrical characteristics is attached to the . 5. The humidity detector according to claim 1 , wherein a predetermined notification is given when said electrical characteristic satisfies a predetermined condition. A test room in which a specimen is placed, an air conditioner for adjusting the humidity in the test room, and a humidity detection device according to any one of claims 1 to 5 , and at least a wet bulb detected by the humidity detection device An environmental test apparatus, wherein the air conditioner is controlled based on the side temperature.

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