JPH06129672A - Equipment for temperature environment test - Google Patents

Abstract

PURPOSE:To furnish equipment for a temperature environment test which performs cooling in a short time and keeps a temperature at an ordinary temperature or, in particular, at the freezing point or below continuously and stably by using coolers for general application. CONSTITUTION:By a blower 34 and a cooler 50 provided in a front chamber 12, the front chamber 12, a testing chamber 10 and a main duct 14 are cooled down to a prescribed temperature beforehand and also dehumidification of a gas in this circulation system is conducted. Thereafter driving of the blower 32 and the cooler 50 is stopped and the gas which is exhausted from the testing chamber 10 and of which the temperature is raised is cooled down by a blower 32 and coolers 44, 46 and 48 provided in the main duct 14. In order to supply the quantity of gas a part of which is exhausted from the testing chamber 10, outdoor air is sucked from an auxiliary pressure duct 16 by a blower 30. The sucked gas is dehumidified in the form of water by a cooler 40 for cooling to 0 deg.C and the dehumidified gas is cooled down to a prescribed cooling temperature by a cooler 42 for cooling to the prescribed temperature.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature environment testing device, and more particularly to a temperature control structure for stably maintaining the temperature in a test chamber at a set temperature below room temperature.

[0002]

2. Description of the Related Art In manufacturing a product, it is customary to carry out various tests for confirming or examining the reliability of the product in terms of performance and quality, and environmental tests are one of those tests. The reliability of the product can be checked from all aspects by changing the setting conditions of. Of the environmental tests, the following devices are generally used as a device for performing a temperature environment test, particularly as a device for performing a temperature environment test at a temperature below room temperature. That is, a test chamber that holds the sample to be tested at a predetermined low temperature and a temperature-controlling room that communicates with the test chamber through the suction port and the air outlet are provided, and a cooler and a blower are provided in this temperature-controlling chamber. However, all the gas whose temperature has risen due to the sample under test was discharged to the outside. Therefore, a device that constantly sucks the outside air into the greenhouse by a blower, cools the sucked outside air with a cooler, and supplies this cooling gas into the test chamber from the outlet in the greenhouse to keep the test chamber at a low temperature. there were.

[0003]

However, when the outside air is sucked and cooled, the water vapor contained in the outside air becomes moisture due to the cooling, and the moisture not only adheres as frost around the cooler but also becomes a specimen. Also adhere as frost or water drops. For example, if outside air having a temperature of 30 ° C. and a relative humidity of 70% (absolute humidity of about 0.019 kg / kg) is used as a cooling gas of 0 ° C., about 19 g of water is generated per 1 m ^{3 of} gas. Therefore, if 1000 m ³ of outside air is cooled, about 19 kg of water actually becomes about 15 kg of frost and adheres to the cooler or the like. Therefore, there is a problem that enormous amount of frost is generated if continuous tests are performed by constantly sucking and cooling the outside air. Furthermore, this frost reduces the space through which the outside air of the cooler flows, and since this frost contains air, it has poor thermal conductivity and the cooling efficiency of the gas is significantly reduced.

Therefore, in order to conduct a temperature environment test under a predetermined room temperature, particularly 0 ° C. or less, in such a state, the capacity volume of the cooler is increased or the temperature range is divided into several stages for defrosting. However, since it had to be cooled down, it was not economical and had a time problem.

The present invention has been made in view of the above conventional problems, and an object thereof is to cool in a short time with a general-purpose cooler and stably maintain a temperature below room temperature, especially below 0 ° C. It is to provide a temperature environment testing device.

[0006]

In order to achieve the above object, a temperature environment test apparatus according to a first aspect of the present invention comprises a test chamber for performing a temperature environment test and the test through an opening through which a gas flows. An antechamber communicating with the chamber, a main duct communicating from the test chamber to the antechamber, and provided in the antechamber or the duct, and dehumidifying and cooling the gas in the antechamber, the test chamber and the duct. And a first cooler that is provided in the front chamber or the main duct, and circulates a gas from the main duct to the test chamber through the front chamber to promote dehumidification cooling of the first cooler. A first blower, an auxiliary pressurizing duct for supplying outside air to a circulation system composed of the test chamber, the antechamber and the main duct in order to prevent a negative pressure in the test chamber, and the auxiliary It is installed in the pressure duct and sucks the outside air to the circulation system. It has a 2nd blower which supplies pressurized gas, and a 2nd cooler which is provided in the above-mentioned auxiliary pressurization duct, and dehumidifies and cools the outside air sucked by the 2nd blower. .

Further, the temperature environment test apparatus according to claim (2) comprises a test chamber for performing a temperature environment test, a front chamber communicating with the test chamber through an opening through which a gas flows, and the test chamber. A main duct communicating with the front chamber, a first cooler provided in the front chamber for dehumidifying and cooling gas in the front chamber, the test chamber and the main duct, and provided in the front chamber, A gas is circulated from the main duct to the test chamber through the antechamber to promote dehumidification and cooling of the first cooler; and a gas provided from the test chamber provided in the main duct. A second blower that sucks and circulates the air in the front chamber; and a second cooler that is provided in the main duct and cools the gas sucked by the second blower.
In order to prevent the test chamber from becoming a negative pressure, an auxiliary pressurizing duct for supplying outside air to a circulation system composed of the test chamber, the antechamber and the main duct, and provided in the auxiliary pressurizing duct. A third blower for sucking outside air to supply pressurized gas to the circulation system, and a third blower provided in the auxiliary pressurizing duct for dehumidifying and cooling the outside air sucked by the third blower. And a cooler.

The temperature environment testing device according to claim (3) is
A test chamber for performing a temperature environment test, a front chamber that communicates with the test chamber via a gas flow filter, a main duct that communicates from the test chamber to the front chamber, and the front chamber or the main duct. A first cooler for dehumidifying and cooling the gas in the antechamber, the test chamber and the main duct, and the antechamber provided in the antechamber or the main duct, the test from the main duct through the antechamber A first blower that circulates gas in the chamber to promote dehumidifying and cooling of the first cooler, and the test chamber, the antechamber, and the main chamber in order to prevent negative pressure in the test chamber. An auxiliary pressure duct for supplying outside air to a circulation system including a duct; a second blower provided in the auxiliary pressure duct for sucking the outside air to supply pressurized gas to the circulation system; It is installed in the pressure duct, and is installed by the second blower. And a second cooler for dehumidification cooling sucked outside air, a second cooler, 0 from the outside air temperature
A 0 ° C. cooling cooler for cooling the gas to 0 ° C., and a predetermined temperature cooling cooler for cooling the gas from 0 ° C. to a predetermined cooling temperature, wherein the outside air is the 0 ° C. cooling cooler and the predetermined temperature It is characterized in that they are arranged so as to pass through a cooling cooler in that order.

A temperature environment testing device according to claim (4) is
A test chamber for performing a temperature environment test, a front chamber that communicates with the test chamber through a filter that circulates gas, a main duct that communicates from the test chamber to the front chamber, and the front chamber is provided in the front chamber. A chamber, a first cooler for dehumidifying and cooling the gas in the test chamber and the main duct, and provided in the front chamber,
A first gas is circulated from the main duct to the test chamber through the front chamber to promote dehumidification cooling of the first cooler.
And a second blower provided in the main duct for sucking gas from the test chamber to supply and circulate the gas to the antechamber, and provided in the main duct and sucked by the second blower. A second cooler for cooling the gas and an auxiliary member for supplying outside air to the circulation system including the test chamber, the antechamber and the main duct in order to prevent a negative pressure in the test chamber. A pressure blower, a third blower provided in the auxiliary pressurizing duct to suck outside air to supply a pressurized gas to the circulation system, and a third blower provided in the auxiliary pressurizing duct A third cooler for dehumidifying and cooling the outside air sucked by the third cooler, wherein the third cooler is a 0 ° C. cooling cooler for cooling the gas from the outside air temperature to 0 ° C., and a predetermined cooler from 0 ° C. A cooler for cooling the gas to a cooling temperature to a predetermined temperature. There, characterized in that it is arranged so as to pass through the 0 ℃ cooling condenser, in order of the predetermined temperature cooling condenser.

[0010]

According to the above construction, the first chamber for dehumidifying and cooling the gas in the front chamber, the test chamber and the main duct is provided in the front chamber or the main duct, or the front chamber. It can be cooled to a predetermined temperature, in which case the moisture in the gas is made into frost and adhered around the first cooler to be sufficiently dehumidified. In particular, when the first cooler is provided in the front chamber, the first cooler is used to drive only the second blower provided in the main duct to the front chamber, the test chamber, and the main chamber. The gas in the duct can be sufficiently dehumidified and cooled. Then, after the temperature of the test chamber reaches a predetermined temperature, the driving of the first cooler is stopped and the second cooler provided in the main duct is stopped so that the frost attached to the first cooler does not scatter. By
The gas can be dehumidified, cooled and circulated.

Further, since the cooler for dehumidifying and cooling is provided in the auxiliary pressurizing duct, the gas constantly introduced into the circulation system is sufficiently dehumidified and cooled, and the cooler provided in the circulation system is a gas cooler. It suffices to mainly perform cooling, and therefore it is possible to prevent frost from being generated in the cooler in the circulation system during circulation. In particular, the cooler for dehumidification cooling provided in the auxiliary pressurizing duct is a cooler for cooling 0 ° C. that cools the gas from the outside temperature to 0 ° C.
To a predetermined cooling temperature, the first temperature cooling cooler cools the gas to a predetermined cooling temperature, so that the 0 ° C. cooling cooler can first dehumidify the moisture in the outside air without freezing it sufficiently. The gas thus cooled is cooled to a predetermined temperature in the test chamber by a cooler for cooling the predetermined temperature.

Further, by providing a filter for circulating gas at the boundary between the test chamber and the antechamber, even if frost or ice particles adhered to the first cooler are scattered during gas circulation, Can be rubbed with a filter. Therefore, the test chamber can be maintained at a stable constant temperature and humidity without frost or ice particles entering the test chamber.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing an embodiment of the structure of a temperature environment test apparatus according to the present invention. The arrow mark in FIG. 1 indicates the direction of gas flow.

The temperature environment testing device 60 includes a test chamber 10 for carrying out a temperature environment test and a filter 18 for circulating a gas.
A front chamber 12 that communicates with the test chamber 10 via a
From the main chamber to the antechamber 12, and a filter 1 provided at the boundary between the test chamber 10 and the antechamber 12 for circulating gas.
In order to prevent the test chamber 10 from becoming negative pressure by 8, the auxiliary pressurizing duct 16 for supplying the pressurizing gas to the circulation system composed of the test chamber 10, the antechamber 12 and the main duct 14 is arranged. There is.

The auxiliary pressurizing duct 16 is provided with a blower 30 and coolers 40 and 42 for group A dehumidifying and cooling device, and the main duct 14 is provided with a blower 32 and a cooler 4.
A group C dehumidifying cooling device consisting of 4, 46 and 48 is arranged,
Further, the front chamber 12 has a B including a blower 34 and a cooler 50.
A group dehumidifying cooling device is arranged.

Further, from the auxiliary pressure duct 16 to the main duct 1
In the portion where the gas flows into 4, the auxiliary pressure duct 16
A filter 22 is provided so that frost, ice particles, and the like generated by the group dehumidifying cooling device do not enter the main duct 14. On the other hand, a filter 18 is provided at the boundary between the antechamber 12 and the test chamber 10 so that frost, ice particles and the like generated by the group B dehumidifying and cooling device of the antechamber 12 do not enter the test chamber 10.

Next to the front chamber 12 and the test chamber 10,
A measurement chamber 24 is provided, equipments and the like of the apparatus of the present invention are stored, and a door (not shown) leading to both the front chamber 12 and the test chamber 10 is provided.

Further, the test chamber 10 is provided with a slit wall 20 so that the gas flow in the test chamber 10 may be in a uniform direction.

The characteristic feature of the present invention is that, first, only the blower 32 in the dehumidifying and cooling device of group C is driven to circulate the gas in the front chamber, the test chamber and the main duct, while being provided in the front chamber. The group B dehumidifying and cooling device including the blower 34 and the cooler 50 cools the gas in the circulation system to a predetermined temperature in advance. Therefore, the moisture in the gas adheres as frost around the cooler 50, and the gas in the circulation system is sufficiently dehumidified and cooled.

After the pre-cooling is finished, the driving of the group B dehumidifying cooling device is stopped, and the sufficiently dehumidified and cooled gas is circulated by the blower 32 in the group C dehumidifying cooling device, while the heat generated from the sample in the test chamber is generated. The gas whose temperature has risen by is cooled by the coolers 44, 46, 48 in the C group dehumidifying and cooling device. For this reason, it is possible to retain the frost that has adhered around the cooler 50 of the B-group dehumidification cooling device without scattering in the front chamber.

Further, when a device accompanied by combustion, such as an automobile engine or a stove, is used as a test sample in the test chamber, the exhaust gas from the test sample of this kind is tested without being mixed into the circulation system. It is directly discharged to the outside from an exhaust passage (not shown) provided in the chamber. At that time, the test chamber is likely to be negative pressure, and the outside air is easily mixed into the test chamber by opening and closing the door (not shown) of the test chamber. However, in the present invention, the auxiliary pressurizing duct 16 is provided. Therefore, the blower 30 in the group A dehumidifying / cooling device can always introduce the gas so that the test chamber does not become negative pressure. Then, this gas is sufficiently dehumidified without freezing its water by a 0 ° C. cooler 40 that cools the gas from the outside air temperature in the group A dehumidifying and cooling device to 0 ° C., and further from 0 ° C. to a predetermined cooling temperature. The cooler 42 for cooling the gas cools the gas to a predetermined temperature in the test chamber.

In the temperature environment testing apparatus 60 of this embodiment, when the test chamber 10 is kept at a constant temperature and humidity, the temperature of the test chamber 10 is kept at 0 ° C. or lower, for example, -25 ° C. The product will be described by taking an automobile engine as an example.

First, only the blower 32 in the group C dehumidifying and cooling device is driven to circulate the gas in the front chamber, the test chamber and the main duct. Then, the group B dehumidifying and cooling device including the blower 34 and the cooler 50 provided in the front chamber cools the gas in the circulation system to a predetermined temperature of −25 ° C. in advance. At that time, moisture in the gas is attached as frost around the cooler 50 to sufficiently dehumidify and cool the gas in the circulation system.

After the pre-cooling is completed, the driving of the group B dehumidifying cooling device is stopped, and the sufficiently dehumidified and cooled gas is circulated by the blower 32 in the group C dehumidifying cooling device. For this reason, it is possible to retain the frost that has adhered around the cooler 50 of the B-group dehumidification cooling device without scattering in the front chamber.

On the other hand, the muffler of the automobile engine in the test chamber is connected to an exhaust passage (not shown) provided in the test chamber so that the exhaust gas does not enter the test chamber, and the exhaust gas containing water is directly supplied. Discharge to the outside. Therefore, the temperature of the gas in the test chamber only rises due to the heat generated from the engine, and the water content does not increase. Therefore, the gas whose temperature has risen can be easily cooled by the coolers 44, 46, and 48 in the group C dehumidifying and cooling device provided in the main duct 14.

Further, since the test chamber becomes negative pressure by the amount of gas sucked by the engine and discharged to the outside, the auxiliary pressurizing duct 1
The blower 30 of 6 always introduces gas so that the test chamber does not become negative pressure. Further, the water vapor contained in the introduced gas is removed in the form of water without being frozen by the 0 ° C. cooling cooler 40 that cools the gas from the outside temperature in the group A dehumidifying cooling device to 0 ° C. It is fully dehumidified.
For example, at 30 ° C, relative humidity 70% (absolute humidity about 0.01
(9 kg / kg) of outside air is first cooled to 0 ° C. by the 0 ° C. cooling cooler 40 to generate a gas having a relative humidity of 100% (absolute humidity of about 0.004 kg / kg) and 0.015 kg of water. . Therefore, about 15 g of water per 1 m ^{3 of} gas is removed by the 0 ° C. cooling cooler 40. Therefore, the gas is then cooled from 0 ° C to -25 ° C-25
The cooler 42 for cooling the temperature of the test chamber to a predetermined temperature of -2
Almost no frost is generated even when cooled to 5 ° C. That is, when the outside air is directly cooled to −25 ° C. as in the conventional case, about 15 g of frost is actually generated per 1 m ³ of gas, but two coolers having different cooling temperatures are arranged as in the present invention. In that case, only about 2 g of frost is actually generated in the second cooler 42 for cooling at −25 ° C. under the same conditions. Therefore, the cooling capacity of the cooler 42 for cooling at −25 ° C. is improved several times as compared with the conventional one, and further, the coolers 44, 46, 48 of the C group dehumidifying cooling device need only perform cooling.
The test room can be stably maintained at a constant temperature and humidity.

The present invention is not limited to the above-mentioned embodiment, and when the sample is a stove or the like, the test chamber is provided with a lifetime surrounding the stove or the like, and the gas containing water vapor generated from the stove or the like is It is directly discharged to the outside. The arrangement of the B-group dehumidifying cooling device and the C-group dehumidifying cooling device provided in the antechamber 12 and the main duct 14 is not limited to that shown in FIG. 1 and may be anywhere as long as the cooling capacity is not hindered. You may arrange. Further, when the sample does not discharge the gas containing water vapor, it is almost unnecessary to suck the outside air from the auxiliary pressurizing duct 16, and the group C dehumidifying cooling device in the circulation system only needs to cool the gas. Good.

In addition, even if water particles flow into the test chamber 10, if the test sample is not adversely affected, the filter 18
May simply be the opening.

From the above, it can be seen that the device of the present invention can efficiently and stably maintain a predetermined temperature and is excellent in economic efficiency.

Further, as described above, the device of the present invention is
It suffices to mainly cool the gas in the circulation system, and even when cooling to a predetermined normal temperature or lower, particularly 0 ° C. or lower, rapid cooling can be performed in a short time with a general-purpose cooler.

The cooler used in this embodiment of FIG.
It may be appropriately selected depending on the required temperature of the test chamber 10, the heat generation amount of the sample, and the like, and examples of the cooler include an N ₂ evaporative cooling device, a CO ₂ evaporative cooling device, and a Freon heat pump cooling device.

Further, in the present embodiment, the temperature environment test device having the test chamber for stably maintaining the subzero temperature is described, but the group B dehumidifying / cooling device arranged in the front chamber 12 and the C arranged in the main duct. When the cooling device of the group dehumidifying cooling device is a heating device such as an electric heater, the device of the present invention can maintain a constant temperature and constant humidity of about -100 ° C to 100 ° C.

[0034]

As described above, according to the present invention,
By providing a first cooler for dehumidifying and cooling the gas in the antechamber, the test chamber and the main duct in the antechamber or the main duct, or in the antechamber, the test chamber is cooled in advance to a predetermined temperature, at which time the gas Moisture inside can be made into frost and made to adhere around the 1st cooler, and it can fully dehumidify. In particular, when the first cooler is provided in the front chamber, the first cooler is used to drive only the second blower provided in the main duct to the front chamber, the test chamber, and the main chamber. The gas in the duct can be sufficiently dehumidified and cooled. Then, after the temperature of the test chamber reaches a predetermined temperature, the driving of the first cooler is stopped and the second cooler provided in the main duct is stopped so that the frost attached to the first cooler does not scatter. The gas can be dehumidified, cooled and circulated. In addition, since a cooler for dehumidification cooling is provided in the auxiliary pressurizing duct, the gas introduced into the circulation system is sufficiently dehumidified and cooled, and the cooler provided in the circulation system mainly cools the gas. Therefore, it is possible to prevent the formation of frost on the cooler in the circulation system during circulation. Particularly, a cooler for dehumidifying cooling provided in the auxiliary pressurizing duct is a 0 ° C cooling cooler for cooling the gas from the outside air temperature to 0 ° C and a predetermined temperature for cooling the gas from 0 ° C to a predetermined cooling temperature. By including the cooling cooler, first, the 0 ° C. cooling cooler can dehumidify the moisture in the outside air without sufficiently freezing the moisture, and the dehumidified gas can be cooled to a predetermined temperature by the cooling cooler. The test chamber is cooled to a predetermined temperature.

Further, by providing a filter for circulating gas at the boundary between the test chamber and the antechamber, even if frost or ice particles adhered to the first cooler are scattered during the gas circulation. Can be rubbed with a filter. Therefore, the test chamber can be maintained at a stable constant temperature and humidity without frost or ice particles entering the test chamber.

As described above, by providing the step of completely dehumidifying at the time of sucking the outside air, it is sufficient to mainly cool the gas in the circulation system, and in the case of cooling to a predetermined normal temperature or lower, particularly 0 ° C. or lower. However, since it can be rapidly cooled with a general-purpose cooler in a short time and a predetermined temperature can be stably maintained, it is excellent in economic efficiency.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of the structure of a temperature environment test apparatus according to the present invention.

[Explanation of symbols]

 10 Test Chamber 12 Anterior Chamber 14 Main Duct 16 Auxiliary Pressurization Duct 18, 22 Filter 20 Slit Wall 24 Measuring Chamber 30, 32, 34 Blower 40 Cooling Cooler at 0 ° C 42 Cooling Cooler at Predetermined Temperature 44, 46, 48, 50 Cooler 60 Temperature environment tester

Claims (4)

[Claims] 1. A test chamber for conducting a temperature environment test, a front chamber communicating with the test chamber through an opening through which a gas flows, a main duct communicating from the test chamber to the front chamber, and the front chamber. Alternatively, the first duct is provided in the main duct to dehumidify and cool the gas in the front chamber, the test chamber, and the main duct.
And a first cooler provided in the front chamber or the main duct to circulate a gas from the main duct to the test chamber through the front chamber to promote dehumidification cooling of the first cooler. A blower, an auxiliary pressurizing duct for supplying outside air to a circulation system composed of the test chamber, the antechamber and the main duct, in order to prevent the test chamber from becoming negative pressure, the auxiliary pressurizing duct A second blower provided inside to suck the outside air to supply a pressurized gas to the circulation system; and an outside air provided inside the auxiliary pressurizing duct to dehumidify and cool the outside air sucked by the second blower. A second cooler,
A temperature environment testing device comprising: 2. A test chamber for performing a temperature environment test, a front chamber communicating with the test chamber through an opening through which a gas flows, a main duct communicating from the test chamber to the front chamber, and the front chamber. A first cooler for dehumidifying and cooling the gas in the front chamber, the test chamber and the main duct; and provided in the front chamber, from the main duct to the test chamber via the front chamber. A first blower that circulates gas to promote dehumidifying and cooling of the first cooler; and a second fan that is provided in the main duct, sucks gas from the test chamber, and supplies and circulates the gas to the front chamber. A blower, a second cooler provided in the main duct for cooling the gas sucked by the second blower, and a test chamber for preventing the test chamber from becoming negative pressure. Supplying outside air to the circulation system consisting of the antechamber and the main duct An auxiliary pressurizing duct, a third blower provided in the auxiliary pressurizing duct for sucking outside air to supply a pressurized gas to the circulation system, and an auxiliary pressurizing duct provided in the auxiliary pressurizing duct. A third cooler for dehumidifying and cooling the outside air sucked by the blower of 3.
A temperature environment testing device comprising: 3. A test chamber for conducting a temperature environment test, a front chamber communicating with the test chamber through a filter for circulating a gas, a main duct communicating from the test chamber to the front chamber, the front chamber or First provided in the main duct to dehumidify and cool gas in the front chamber, the test chamber, and the main duct
And a first cooler provided in the front chamber or the main duct to circulate a gas from the main duct to the test chamber through the front chamber to promote dehumidification cooling of the first cooler. A blower, an auxiliary pressurizing duct for supplying outside air to a circulation system composed of the test chamber, the antechamber and the main duct, in order to prevent the test chamber from becoming negative pressure, the auxiliary pressurizing duct A second blower provided inside to suck the outside air to supply a pressurized gas to the circulation system; and an outside air provided inside the auxiliary pressurizing duct to dehumidify and cool the outside air sucked by the second blower. A second cooler,
And a second cooler that cools the gas from ambient temperature to 0 ° C.
A cooler for cooling at 0 ° C. and a cooler for cooling at a predetermined temperature for cooling gas from 0 ° C. to a predetermined cooling temperature, and outside air passes through the cooler for cooling at 0 ° C. and the cooler for cooling at the predetermined temperature in this order. The temperature environment test device is characterized by being arranged as follows. 4. A test chamber for performing a temperature environment test, a front chamber communicating with the test chamber via a filter for circulating a gas, a main duct communicating with the front chamber from the test chamber, and a front chamber in the front chamber. A first cooler provided to dehumidify and cool the gas in the front chamber, the test chamber and the main duct; and a gas provided from the main duct to the test chamber via the front chamber. And a second blower for promoting dehumidifying and cooling of the first cooler, and a second blower provided in the main duct for sucking gas from the test chamber and supplying and circulating the gas to the front chamber. A second cooler that is provided in the main duct and cools the gas sucked by the second blower; and the test chamber and the second cooler to prevent the test chamber from becoming negative pressure. The outside air is supplied to the circulation system consisting of the antechamber and the main duct. An auxiliary pressurizing duct, a third blower provided in the auxiliary pressurizing duct, for sucking outside air to supply pressurized gas to the circulation system, and an auxiliary pressurizing duct provided in the auxiliary pressurizing duct. A third cooler for dehumidifying and cooling the outside air sucked by the blower of 3.
And the third cooler cools the gas from ambient temperature to 0 ° C.
A cooler for cooling at 0 ° C. and a cooler for cooling at a predetermined temperature for cooling gas from 0 ° C. to a predetermined cooling temperature, and outside air passes through the cooler for cooling at 0 ° C. and the cooler for cooling at the predetermined temperature in this order. The temperature environment test device is characterized by being arranged as follows.