ENVIRONMENT TESTING APPARATUS CAPABLE OF CONTROLLING CONDENSATION AMOUNT, AND CONTROL METHOD THEREFOR
First Claim
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1. An environment testing apparatus, comprising:
- a test chamber into which a test object is placed;
a wet bulb and a dry bulb disposed inside the test chamber, which obtain the temperature and the humidity of the air inside the test chamber;
an air-conditioner which conditions the air inside the test chamber to predetermined temperature and humidity, based on signals from the wet bulb and the dry bulb;
a cooling/heating unit accommodated inside the test chamber, which has a top surface for disposing thereon the test object and cools or heats the test object;
a condensation amount sensor to be placed on the test object; and
a controller which controls the condensation amount on the surface of the test object based on signals from the condensation amount sensor, by varying a temperature instruction value for the cooling/heating unit between a deviation-added value of a wet bulb temperature obtained by the wet bulb and a deviation-added value of a dew-point temperature of the test chamber.
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Abstract
An object of the present invention is to provide an environment testing apparatus capable of achieving, on the surface of a test object, a stable condensation status with less variation in the condensation amount than that of already existing-art. The environment testing apparatus 100 includes a regulator 4. On the basis of a signal from a condensation amount sensor 9, the regulator 4 controls the temperature of a cooling/heating plate 6 between a deviation-added value of the wet bulb temperature obtained from the wet bulb 11, and a deviation-added value of the dew-point temperature inside the test chamber 1.
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4 Claims
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1. An environment testing apparatus, comprising:
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a test chamber into which a test object is placed; a wet bulb and a dry bulb disposed inside the test chamber, which obtain the temperature and the humidity of the air inside the test chamber; an air-conditioner which conditions the air inside the test chamber to predetermined temperature and humidity, based on signals from the wet bulb and the dry bulb; a cooling/heating unit accommodated inside the test chamber, which has a top surface for disposing thereon the test object and cools or heats the test object; a condensation amount sensor to be placed on the test object; and a controller which controls the condensation amount on the surface of the test object based on signals from the condensation amount sensor, by varying a temperature instruction value for the cooling/heating unit between a deviation-added value of a wet bulb temperature obtained by the wet bulb and a deviation-added value of a dew-point temperature of the test chamber. - View Dependent Claims (2, 3)
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4. A method of controlling an environment testing apparatus including:
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a test chamber into which a test object is placed; a wet bulb and a dry bulb disposed inside the test chamber, which obtain the temperature and the humidity of the air inside the test chamber; an air-conditioner which conditions the air inside the test chamber to predetermined temperature and humidity, based on signals from the wet bulb and the dry bulb; a cooling/heating unit accommodated inside the test chamber, which has a top surface for disposing thereon the test object and cools or heats the test object; and a condensation amount sensor to be placed on the test object, the method comprising the steps of; conditioning the air inside the test chamber to predetermined temperature and humidity by operating the air-conditioner; measuring a condensation amount on the surface of the test object based on signals from the condensation amount sensor; and controlling the condensation amount on the surface of the test object so as to approximate the condensation amount to a predetermined amount, based on the condensation amount thus measured, by varying a temperature instruction value for the cooling/heating unit between a deviation-added value of a wet bulb temperature obtained by the wet bulb and a deviation-added value of a dew-point temperature of the test chamber.
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Specification