JP2023054374A - Environmental test device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To develop an environmental test device suitable for use of a ventilation test using a relatively small object as a target.

SOLUTION: An environmental test device includes an air-conditioned chamber 7, ventilation means 10, 30, a ventilation duct 20 installed in the chamber 7, a bypass flow path 21 bypassing the ventilation duct 20 in the chamber 7, and ventilation adjustment means 37, 38 that change a ratio of an air blow amount passing through the ventilation duct 20 to an air blow amount bypassing the ventilation duct 20. A sample 300 is placed in the ventilation duct 20, and the sample 300 can be exposed to an air-conditioned ventilation environment.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2023,JPO&INPIT

Description

TECHNICAL FIELD The present invention relates to an environmental test apparatus capable of conducting an environmental test in a ventilated environment in a test area.

Airplanes, vehicles, trains, etc. are exposed to wind during flight and running. Therefore, in order to reproduce the environment such as when an aircraft or vehicle is running and evaluate the effects of running wind, etc., there are cases where the test area is made into a ventilated environment, and the test object is exposed to the environment to perform the desired test. (hereinafter referred to as the ventilation test).
In addition, there is a demand to conduct a ventilation test while controlling the temperature and humidity of the air blowing onto the specimen.
As an apparatus capable of carrying out such a draft test, there is a wind tunnel test apparatus as disclosed in Patent Document 1, for example.

JP 2012-173245 A

The wind tunnel test apparatus disclosed in Patent Literature 1 performs a ventilation test by setting the entire automobile in a test area. The wind tunnel test apparatus disclosed in Patent Document 1 has high performance, but has a problem that the apparatus itself is very large.
Therefore, it is unsuitable for use in performing ventilation tests on, for example, parts of automobiles and aircraft.
The present invention focuses on the above-mentioned problems of the prior art, and aims to develop an environmental test apparatus suitable for the purpose of conducting ventilation tests on relatively small objects such as individual parts. be.

An aspect of the related invention for solving the above-described problems has a chamber to be air-conditioned and a blower means, a cylindrical ventilation duct is installed in the chamber, and the ventilation duct has openings at both ends is provided, and one of the openings opens into the chamber, and a detour flow path that bypasses the ventilation duct is provided in the chamber and around the ventilation duct, and the ventilation duct is It has a ventilation adjustment means for changing the ratio of the amount of air to pass through and the amount of air to flow through the detour channel, and the test piece can be placed in the ventilation duct and exposed to an air-conditioned ventilation environment. It is an environmental test apparatus characterized by being
In the aspect described above, it is preferable that the one opening is a discharge side opening formed by opening the end of the ventilation duct as a whole.
Another aspect (related invention) for solving the above-described problems has a chamber to be air-conditioned and a blowing means, a ventilation duct is installed in the chamber, and the ventilation duct is installed in the chamber There is a detour flow path that bypasses the ventilation duct, and has a ventilation adjustment means that changes the ratio of the amount of air that passes through the ventilation duct and the amount of air that bypasses the ventilation duct, and the specimen is installed in the ventilation duct The environmental test apparatus is characterized in that the specimen can be exposed to an air-conditioned, ventilated environment.

The environmental test apparatus of this embodiment has a ventilation duct installed in the chamber to be air-conditioned. In addition, there is a detour channel that bypasses the ventilation duct in the chamber. Then, the ratio of the air volume passing through the ventilation duct and the air volume bypassing the ventilation duct can be changed by the air volume adjusting means.
The environmental test apparatus of this aspect can be made much smaller in overall shape and test area than the apparatus disclosed in Patent Document 1, and is suitable for performing ventilation tests on relatively small specimens. Are suitable.

In the above-described aspect, it is preferable that the air blowing means includes an air conditioning blowing means and a blowing load generating blowing means, and the blowing load generating blowing means is installed outside the chamber.

According to this aspect, it is possible to expose the specimen to a relatively high-speed ventilation environment by mounting a comparatively large air blowing load generating air blowing means while keeping the air blowing amount of the air conditioning air blowing means constant.

In the above-described aspect, it is preferable that the blowing means for generating the blowing load sucks the air in the chamber and blows the air to the ventilation duct and the detour flow path.

According to this aspect, the overall shape and test area can be made smaller. In addition, stable temperature or temperature/humidity control can be achieved regardless of the amount of air blown through the ventilation duct.

In the above aspect, a door for opening and closing the chamber is provided, and the ventilation duct is arranged in a posture in which air passes in a lateral direction when the door is opened, and at least a part of the ventilation duct is It is desirable to be able to move the specimen in and out of the air duct by removing or opening it.

According to this aspect, it is easy to put the specimen in and out of the ventilation duct.

In the above aspect, the chamber has a door for opening and closing the chamber, and the ventilation duct is arranged in a posture in which air passes from the back to the front when the door is opened. It is also recommended to adopt a configuration in which the specimen can be taken in and out.

According to this aspect, it is easy to put the specimen in and out of the ventilation duct.

INDUSTRIAL APPLICABILITY The environmental test apparatus of the present invention can be made smaller in overall shape and test area, and is suitable as an environmental test apparatus for carrying out ventilation tests on relatively small objects.

1 is a system diagram of an environmental test apparatus according to an embodiment of the present invention; FIG. BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows the external appearance of the environmental test apparatus of embodiment of this invention. 3 is a conceptual diagram of the AA cross section of the chamber section of the environmental test apparatus of FIG. 2. FIG. FIG. 3 is a conceptual diagram of a BB cross section of the chamber section of the environmental test apparatus of FIG. 2; It is an explanatory view conceptually explaining the flow of air in a chamber part. 4 is an exploded perspective view of the ventilation duct; FIG. It is a system diagram of the environmental test apparatus of other embodiment of this invention. It is a conceptual diagram of the cross section of the environmental test apparatus of other embodiment of this invention.

Embodiments of the present invention will be further described below. The environmental test apparatus 1 of the present embodiment is a device capable of testing performance and durability by exposing a test piece 300, such as a part of an aircraft, a vehicle, or a train, to a ventilation environment.
As shown in FIG. 1, the environmental test apparatus 1 is composed of a body section 100 and a running wind generating section 200. As shown in FIG.
The main body 100 has an insulating tank 3 defined by an insulating wall 2, as shown in FIG. A partition member 5 is provided inside the heat insulating tank 3 to divide the inside of the heat insulating tank 3 into an air conditioning section 6 and a chamber section 7 .

An air conditioner 8 and a blower 10 are arranged in the air conditioner 6 . The air conditioner 8 includes a cooling device 11 and a heater (heating device) 12 . Incidentally, in addition to this, a humidifying device may be incorporated.
The air-conditioning section 6 has an air-conditioning ventilation passage 15 annularly communicating with the chamber section 7 , and the air-conditioning device 8 and the blower 10 described above are incorporated in the air-conditioning ventilation passage 15 . The blower 10 of the air conditioning unit 6 is hereinafter referred to as the air conditioning blower 10 . The air-conditioning blower 10 is inverter-controlled, and the rotation speed can be changed.

The air-conditioning ventilation path 15 is formed in a part of the heat insulating tank 3 and communicates with the chamber section 7 at two points, an air blowing section 16 and an air introducing section 17 .
When the air-conditioning blower 10 is started, the air in the chamber portion 7 is introduced from the air introduction portion 17 into the air-conditioning ventilation passage 15 . As a result, the air-conditioning ventilation path 15 is in a ventilated state, and the air comes into contact with the air-conditioning equipment 8 to exchange heat. Then, the temperature-controlled air is blown from the air blowing portion 16 to the chamber portion 7 . Thus, the chamber section 7 is a space that is air-conditioned by the air introduced from the air conditioning section 6 .

In the environmental test apparatus 1 of this embodiment, a ventilation duct 20 is arranged inside the chamber section 7 . The ventilation duct 20 is cylindrical and can be said to be a small wind tunnel. The ventilation duct 20 is provided with openings at both ends. One opening is an air introduction side opening 26, and only a part of the cylindrical cross section is open. The other opening is an air discharge side opening 27, and the entire cylindrical cross section is open.
The air introduction side opening 26 is provided with a louver (wind direction adjusting member) 47 for adjusting the wind direction.
The ventilation duct 20 occupies a part of the area inside the chamber part 7 . Conversely, there is space around the ventilation duct 20 . In this embodiment, the space around the ventilation duct 20 within the chamber part 7 functions as the detour channel 21 .
The ventilation duct 20 is provided with a small hole 18 for measuring the wind speed.
A specimen 300 is placed in the ventilation duct 20 .

A wall surface of the chamber portion 7 is provided with a main passage opening 22 , a sub passage opening 23 and an intake opening 25 .
The main passage opening 22 opens at a position facing the air introduction side opening 26 on the one end side of the ventilation duct 20 . The main passage opening 22 and the air introduction side opening 26 of the ventilation duct 20 are connected by a short connecting member 45 .
The secondary passage opening 23 opens at a position facing the detour passage 21 away from the air introduction side opening 26 of the ventilation duct 20 . The air intake opening 25 opens at a position away from the main passage opening 22 and the sub passage opening 23 described above.

The running wind generator 200 has a blower 30 . Hereinafter, the blower 30 will be referred to as a running air blower (air blowing load generating air blower) 30 .
The running wind generating section 200 has an air passage that connects the running wind blower 30 and the chamber section 7 . All of the air passages are composed of ducts.
As one of the air passages, there is a suction passage 31 that connects the air intake opening 25 of the chamber portion 7 and the air intake portion of the running air blower 30 .
Further, the discharge side of the running air blower 30 is branched into a main supply passage 35 and a sub-supply passage 36, which are connected to the chamber section 7, respectively. The main supply passage 35 is a passage that connects the discharge side of the running air blower 30 and the main passage opening 22 of the chamber portion 7 . The sub-supply path 36 is a flow path that connects the discharge side of the running air blower 30 and the sub-path opening 23 of the chamber portion 7 .

Also, dampers 37 and 38 are provided in the main supply path 35 and the sub-supply path 36 . In order to distinguish between the two, the damper 37 attached to the main supply path 35 is called the main path damper 37 and the damper 38 attached to the sub supply path 36 is referred to as the sub path damper 38 .
Both the main path damper 37 and the secondary path damper 38 can be adjusted in opening by a motor (not shown). In this embodiment, the main passage damper 37 and the sub passage damper 38 function as air blow adjustment means for changing the ratio of the air blow amount passing through the ventilation duct 20 and the air blow amount bypassing the ventilation duct 20 .
An air volume meter 50 is attached to the main supply path 35 .

A first temperature sensor 40 and a second temperature sensor 41 are provided in the chamber part 7 . The first temperature sensor 40 is provided near the air blowing part 16 of the chamber part 7 .
The second temperature sensor 41 is installed inside the connecting member 45 .
The environmental test apparatus 1 has a temperature controller 42 and a flow rate controller 43 .
Detection signals from the first temperature sensor 40 and the second temperature sensor 41 are input to the temperature controller 42 . Also, the air conditioner 8 is controlled by the output of the temperature adjuster 42 . In this embodiment, the air conditioning unit 6 is controlled mainly by the temperature of the air blown from the air conditioning unit 6 detected by the first temperature sensor 40, and the temperature inside the connecting member 45 detected by the second temperature sensor 41 is used to control the air conditioning unit 6. corrected. The temperature inside the connection member 45 is substantially the same as the temperature of the air supplied inside the ventilation duct 20 .

A detection signal from an air flow meter 50 is also input to the flow controller 43 . The opening degrees of the main path damper 37 and the secondary path damper 38 are adjusted by the output signal of the flow rate regulator 43 .

Next, functions of the main body portion 100 and the traveling wind generating portion 200 will be described.
The main body part 100 alone can create a desired temperature environment in the chamber part 7 . That is, the chamber part 7 is an air-conditioned chamber.
The air-conditioning blower 10 of the main body 100 is driven to ventilate the air-conditioning ventilation path 15, and the air-conditioning equipment 8 is controlled so that the detected value of the first temperature sensor 40 approaches the temperature of the set environment.

By operating the air-conditioning blower 10, the air in the chamber part 7 is introduced from the air introduction part 17 into the air-conditioning ventilation passage 15, passes through the air-conditioning equipment 8 in the air-conditioning ventilation passage 15, and the temperature is adjusted. Then, the air whose temperature has been adjusted is returned from the air blowing part 16 to the chamber part 7 to create a desired temperature environment in the chamber part 7 .

By driving the running wind generator 200 in this state, the inside of the ventilation duct 20 becomes a ventilation environment, and the specimen 300 in the ventilation duct 20 is exposed to the ventilation environment at a desired temperature and at a desired wind speed.
That is, when the running wind blower 30 of the running wind generating section 200 is driven, the air in the chamber portion 7 is sucked into the running wind blower 30 through the intake opening 25 of the chamber portion 7 through the suction passage 31 . The sucked air is discharged from the discharge part of the running air blower 30 and enters the chamber part 7 via the main supply path 35 and the sub-supply path 36 .

In this embodiment, the running wind generator 200 constitutes an air-conditioning channel communicating annularly with the chamber section 7 , sucks the air in the chamber section 7 and returns the air to the chamber section 7 .
Here, the inside of the chamber section 7 is air-conditioned by the air-conditioning section 6 and maintained at a desired temperature. In the present embodiment, the running wind generating section 200 draws in the air in the chamber section 7 and returns it to the chamber section 7. Therefore, the air blown from the running wind generating section 200 into the chamber section 7 is temperature-controlled in the first place. It's fresh air.

In this embodiment, the air passing through the main supply passage 35 of the running wind generating portion 200 is introduced into the chamber portion 7 through the main passage opening 22 . The main passage opening 22 opens at a position facing the air introduction side opening 26 of the ventilation duct 20 . A connection member 45 connects between the main passage opening 22 and the ventilation duct 20 . Therefore, substantially all of the air discharged from the main passage opening 22 is introduced into the ventilation duct 20 .

In this embodiment, the air flowing through the main supply passage 35 is directly introduced into the ventilation duct 20, and the wind velocity in the ventilation duct 20 increases to generate wind. That is, the inside of the ventilation duct 20 becomes a ventilation environment. As described above, the air flowing through the main supply passage 35 is the air sucked from the chamber portion 7 and is temperature-controlled. will pass.
The air that has passed through the ventilation duct 20 is discharged into the chamber portion 7 from the air discharge side opening 27 .

On the other hand, the air passing through the sub-supply passage 36 is introduced into the chamber portion 7 through the sub-passage opening 23, but the sub-passage opening 23 is opened at a position away from the air introduction side opening 26 of the ventilation duct 20. there is
Therefore, the air flowing through the sub-supply passage 36 does not enter the ventilation duct 20 and flows through the detour passage 21 around the ventilation duct 20 .

Air flowing through any of the flow paths is sucked into the air intake opening 25 and returns to the running wind generating section 200 .
Further, in this embodiment, the main supply passage 35 is provided with a main passage damper 37 and the sub supply passage 36 is provided with a sub passage damper 38 , both of which are adjusted in degree of opening by the flow controller 43 . Therefore, it is possible to adjust the ratio of the air volume passing through the ventilation duct 20 and the air volume flowing through the detour passage 21 in the chamber part 7 bypassing the ventilation duct 20 . As a result, the wind speed in the ventilation duct 20 can be adjusted to a desired wind speed.
Thus, in this embodiment, the air adjusted to the desired temperature passes through the ventilation duct 20 at the desired wind speed. Therefore, air of a desired temperature is blown to the specimen 300 .

The overview of the environmental test apparatus 1 has been described above with reference to the system diagram. Next, the configuration of the environmental test apparatus 1 will be explained more substantively. Note that members that are the same as those explained in the system diagram of FIG. 1 are given the same reference numerals, thereby omitting redundant explanations.

The environmental test apparatus 1 shown in FIG. 2 has a channel configuration equivalent to that shown in the system diagram of FIG.
As shown in FIG. 2, the environmental test apparatus 1 is composed of a main body 100 and a running wind generator 200. As shown in FIG. A door 60 is provided on the front surface of the main body 100 as shown in FIGS.
The main body 100 has an insulating tank 3 defined by an insulating wall 2 as shown in FIG.
The heat insulating tank 3 is a housing formed by the heat insulating wall 2, and has an opening 61 on the front surface, and the opening 61 is provided with a door 60. - 特許庁A partition member 5 is provided inside the heat insulating tank 3 to separate the air conditioning section 6 and the chamber section 7 from each other.

An air conditioner 8 and an air-conditioning blower 10 are arranged in the air-conditioning unit 6 .
In this embodiment, an air blowing portion 16 is provided above the partition member 5 and an air introduction portion 17 is provided below the partition member 5 .
The air-conditioning section 6 has an air-conditioning ventilation passage 15 annularly communicating with the chamber section 7 , and the air-conditioning equipment 8 and the air-conditioning blower 10 are incorporated in the air-conditioning ventilation passage 15 .
The air-conditioning ventilation passage 15 communicates with the chamber section 7 at two points, an air blowing section 16 and an air introducing section 17 .

A ventilation duct 20 is arranged in the chamber portion 7 . The ventilation duct 20 occupies a part of the area inside the chamber part 7 . Around the ventilation duct 20 there is a space that functions as a detour passage 21 .
As shown in FIGS. 5 and 6, the ventilation duct 20 is a cylinder with a square cross section. The ventilation duct 20 has a top wall 63, a bottom wall 65, and a front side wall 66 and a back side wall 67 connecting the two. Openings are provided at both ends of the ventilation duct 20 .
In this embodiment, at least one side of the ventilation duct 20 is removable. In this embodiment, as shown in FIG. 6, the front side wall 66 is removable. Moreover, a part or the whole of one side wall of the ventilation duct 20 may be opened.

The ventilating duct 20 is arranged with the opening facing the left and right side walls 70 and 71 of the chamber section 7 with the door 60 opened as a reference (see FIG. 4). That is, the ventilation duct 20 is arranged in a posture in which the air passes in the lateral direction when the door 60 is opened. Then, the front side wall 66 facing the door 60 of the ventilation duct 20 can be removed.
In this embodiment, opening the door 60 causes the front side wall 66 of the ventilation duct 20 to face the operator. Therefore, the operator can open the door 60 and remove the front side wall 66 to put the specimen 300 in and out of the ventilation duct 20 .

In this embodiment, the side wall 71 on the right side of the drawing (see FIG. 4) is provided with the main passage opening 22, the sub passage opening 23, and the intake opening 25. As shown in FIG.
The main passage opening 22 opens at a position facing the air introduction side opening 26 on the one end side of the ventilation duct 20 . The secondary passage opening 23 opens at a position facing the detour passage 21 away from the air introduction side opening 26 of the ventilation duct 20 . The air intake opening 25 opens at a position away from the main passage opening 22 and the sub passage opening 23 described above.

The running wind generator 200 has a running wind blower 30 . The running wind generator 200 also has a suction path 31 , a main supply path 35 and a sub-supply path 36 .
The main body part 100 alone can create a desired temperature environment in the chamber part 7 .
The air conditioning blower 10 of the main body 100 is operated to bring the inside of the air conditioning ventilation path 15 into a ventilated state, and the air conditioner 8 is controlled so that the detected value of the first temperature sensor 40 approaches the temperature of the set environment.

In this embodiment, the air in the chamber portion 7 is introduced into the air-conditioning ventilation passage 15 from the air introduction portion 17 provided in the lower portion of the partition member 5, passes through the air-conditioning equipment 8 in the air-conditioning ventilation passage 15, and changes the temperature and humidity. is arranged. Then, the air whose temperature and humidity have been adjusted is returned to the chamber section 7 from the upper air blowing section 16 to create a desired temperature environment within the chamber section 7 .

By driving the running wind generator 200 in this state, the inside of the ventilation duct 20 becomes a ventilation environment, and the specimen 300 in the ventilation duct 20 is exposed to the ventilation environment at a desired temperature and at a desired wind speed.
That is, when the running wind blower 30 of the running wind generating section 200 is driven, the air in the chamber portion 7 is sucked into the running wind blower 30 through the intake opening 25 of the chamber portion 7 through the suction passage 31 . The sucked air is discharged from the running air blower 30 and enters the chamber section 7 via the main supply path 35 and the sub-supply path 36 .
Air passing through the main supply passage 35 is introduced into the chamber portion 7 from the main passage opening 22. As shown in FIGS. It opens at a position facing the side opening 26 .

Therefore, the air flowing through the main supply passage 35 is directly introduced into the ventilation duct 20, and the wind speed inside the ventilation duct 20 increases. The air introduced into the ventilation duct 20 passes around the specimen 300 and is discharged from the air discharge side opening 27 .
Air passing through the sub-supply passage 36 is introduced into the chamber portion 7 through the sub-passage opening 23. As shown in FIGS. It is open at a distance from the
Therefore, the air flowing through the sub-supply passage 36 does not enter the ventilation duct 20 and flows through the detour passage 21 around the ventilation duct 20 .

Air flowing through any of the flow paths is sucked into the air intake opening 25 and returns to the running wind generating section 200 .
Further, in this embodiment, the main supply path 35 is provided with the main path damper 37 and the sub supply path 36 is provided with the sub path damper 38 , both of which have their opening degrees adjusted by the flow controller 43 . Therefore, the ratio between the amount of air blown through the ventilation duct 20 and the amount of air blown through the detour passage 21 in the chamber part 7 bypassing the ventilation duct 20 is adjusted. As a result, the wind speed in the ventilation duct 20 can be adjusted to a desired wind speed.
Moreover, according to this embodiment, stable temperature or temperature/humidity control can be performed regardless of the amount of air blown through the ventilation duct 20 .

In the above-described embodiment, the ventilation duct 20 is arranged with the opening facing the left and right side walls 70 and 71 of the chamber section 7 with the door 60 opened as a reference (see FIG. 4).
However, the present invention is not limited to this layout, and air passes through the ventilation duct 20 from the back to the front when the door 60 is open, like the environmental test apparatus 400 shown in FIG. It may be placed in a position to

As shown in FIGS. 1 and 2, the environmental test apparatus 1 described above is composed of a main unit 100 and a running wind generating unit 200. As shown in FIGS.
In the environmental test apparatus 1 described above, the main body 100 includes the air conditioning blower 10 , and the running wind generating section 200 has the running wind blower 30 .
According to this aspect, a strong wind can be generated in the ventilation duct 20 .
However, the present invention is not limited to this configuration, and one of the blowers can be omitted.

For example, like the environmental test apparatus 80 shown in FIG. The environmental test apparatus 80 has an in-chamber main supply path 82 that communicates the pressure equalizing space 81 and the ventilation duct 20 , and an in-chamber secondary supply path 83 that communicates the pressure equalizing space 81 with the perimeter of the ventilation duct 20 .
In addition, dampers 85 and 86 are provided in the in-chamber main supply path 82 and in the chamber sub-supply path 83 .

In the environmental test apparatus 80 of the present embodiment, the dampers 85 and 86 function as air blow adjusting means for changing the ratio of the air blow amount passing through the air duct 20 and the air blow amount bypassing the air duct 20 .
Also in the environmental test apparatus 80 of this embodiment, a desired temperature environment is created in the chamber section 7 by operating the air-conditioning blower 10 .

In addition, by adjusting the opening degrees of the dampers 85 and 86, the amount of air blown through the ventilation duct 20 via the in-chamber main supply path 82 and the detour flow in the chamber section 7 via the in-chamber sub-supply path 83 The rate of blast flow through channel 21 is adjusted. As a result, the inside of the ventilation duct 20 can be adjusted to a desired wind speed.

In the embodiment described above, the air conditioning section 6 and the chamber section 7 are combined to form the main body section 100, but the air conditioning section 6 and the chamber section 7 may be separate bodies.

In the embodiment described above, a set of two dampers 37, 38, 85, 86 that can change the degree of opening are employed as the ventilation adjusting means. Although this configuration is recommended, the member for adjusting the degree of opening is not limited to a damper, and may be a valve. Alternatively, one valve, such as a three-way switching valve, may be used to adjust the opening degrees of two flow paths.
Alternatively, only one of the main path damper 37 and the sub-path damper 38 may be provided to change the ratio of the amount of air blown through each flow path. The same applies to the dampers 85 and 86, and only one of them may be provided.

In this embodiment, the dampers 37, 38, 85, and 86 are employed as the air blow adjusting means, so that the ratio of the air blow amount passing through the ventilation duct 20 and the air blow amount bypassing the air duct 20 varies widely. It is also possible to rapidly change the blow rate.
Therefore, for example, it is possible to simulate the state of running wind such as idling, acceleration, constant speed cruise, and deceleration of the automobile.

In the embodiment described above, the cross-sectional shape of the ventilation duct 20 is a square cylinder, but the cross-sectional shape of the ventilation duct 20 is not limited, and may be circular or semicylindrical.

1, 80, 400 Environmental test device 6 Air conditioning unit 7 Chamber unit 10 Air conditioning blower 20 Ventilation duct 21 Detour passage 22 Main passage opening 23 Side passage opening 25 Air intake opening 30 Running air blower (air blowing load generating air blowing means )
37 main road damper (ventilation control means)
38 side road damper (ventilation adjustment means)
80 environmental test device 85, 86 damper (ventilation adjustment means)
100 body part 200 running wind generating part 300 specimen

Claims (2)

having an air-conditioned chamber and blowing means;
A cylindrical ventilation duct is installed in the chamber, the ventilation duct is provided with openings at both ends, and one of the openings opens into the chamber,
A detour flow path bypassing the ventilation duct is provided in the chamber and around the ventilation duct,
A blowing adjustment means for changing the ratio of the blowing amount passing through the ventilation duct and the blowing amount flowing through the detour flow path,
An environmental test apparatus, wherein a test piece is installed in the ventilation duct so that the test piece can be exposed to an air-conditioned ventilation environment. 2. The environmental test apparatus according to claim 1, wherein said one opening is a discharge side opening formed by opening an end of said ventilation duct as a whole.

Images