JPH0637995B2 - Cold environment test equipment - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a cold heat environment test apparatus, and more particularly, to uniform temperature distribution in a test chamber when cold air or hot air is circulated in the test chamber, and prevention of reduction in air volume and wind speed. The present invention relates to a cold heat environment test apparatus suitable for achieving the above.

[Background of the Invention]

A conventional cold heat circulation test apparatus is provided with a test chamber, a low temperature chamber for generating cold air, and a high temperature chamber for generating hot air independently, as shown in JP-A-58-42952, and cool air generated in the low temperature chamber, The hot air generated in the high greenhouse is switched by a cold air switching damper or a hot air switching damper to be distributed to the test chamber, and the cold air switching damper blocks the cold air supply port and the hot air switching damper blocks the hot air supply port. At times, the cold air is circulated to the cold air circulation passage in the low temperature chamber, and the hot air is circulated to the hot air circulation passage in the high temperature chamber.

However, in this cold heat circulation test apparatus, even when cold air or hot air is circulated to the test chamber, the cold air supply port and the cold air circulation passage of the low temperature chamber have the hot air supply port and the hot air circulation passage of the high temperature chamber. Since it has a structure that communicates with each other, when a large amount of sample is stored in the test room and tested,
The sample becomes resistance, and cold air or hot air bypasses to the cold air circulation passage of the low temperature chamber or the hot air circulation passage of the high temperature chamber with little resistance, and it becomes impossible to supply sufficient cold air or hot air to the test chamber. As a result, the air volume and the air velocity decrease, so that the sample is not uniformly exposed to the air, and the temperature change time becomes non-uniform.

Further, since there is no means for directly deflecting cold air or hot air, there is a problem that the temperature distribution in the test chamber cannot be made uniform.

[Object of the Invention]

The object of the present invention is to solve the problems of the prior art, and even if a large amount of sample is stored in the test chamber, the bypass amount of the cold air or hot air to the circulation passage is eliminated, and the cold air or hot air is effectively flowed into the test chamber. It is an object of the present invention to provide a cold heat environment test apparatus that can be made to operate and can have a uniform temperature distribution in a test chamber by directly deflecting cold air and hot air.

[Outline of Invention]

In order to achieve this object, the present invention provides a cold air circulation passage portion near a cold air supply port with a first partition plate capable of opening and closing the cold air circulation passageway in conjunction with a cold air switching damper, and providing hot air near the hot air supply port. A second partition plate is provided in the circulation passage portion so as to open / close the hot air circulation passage in conjunction with the hot air switching damper, and the cold air switching damper and the hot air switching damper are configured to be fully opened with an acute opening angle. On the other hand, when the cold air switching damper moves to the open position, the first partition plate closes the cold air circulation passage to distribute the entire amount of cold air to the cold air supply port, and when the cold air switching damper moves to the closed position, the cold air circulation passage is closed. When the hot-air switching damper moves to the open position, the second partition plate closes the hot-air circulation passage to allow the entire amount of hot air to flow to the hot-air supply port, and when the hot-air switching damper moves to the closed position. heat It is obtained by configured to open the circulation passage.

Example of Invention

An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a vertical cross-sectional view of a cold environment testing apparatus according to the present invention, FIG. 2 is a detailed view of a switching damper section in FIG. 1, and FIG. 3 is a perspective view of an opening / closing mechanism section of a switching damper and a partition plate. There is. In FIG. 1 and FIG. 2, this cold and hot environment test device stores a sample in a test chamber and performs a heat shock test on the sample by alternately changing the test chamber to a low temperature environment and a high temperature environment. The test chamber 1 is provided with a low temperature chamber 2 for generating cold air and a high temperature chamber 3 for generating hot air which are independent of the test chamber 1. The partition wall between the test chamber 1 and the low temperature chamber 2 is provided with a cold air supply port 4 for allowing cold air to flow into the test chamber 1 and a cold air discharge port 5 for discharging cold air in the test chamber 1. The cold air supply port 4 and the cold air discharge port 5 are provided with cold air switching dampers 6 and 7 for opening and closing them. The partition wall between the test chamber 1 and the high temperature chamber 3 has a hot air supply port 8 for allowing hot air to flow into the test chamber 1.
And a hot air outlet 9 for discharging hot air in the test chamber 1 is provided. The hot air supply port 8 and the hot air discharge port 9 are provided with hot air switching dampers 10 and 11 for opening and closing the hot air supply port 8 and the hot air discharge port 9. Inside the low temperature chamber 2, a cooler 12 for cooling the air in the room, a temperature control heater 13 for controlling the cooled air to a predetermined temperature and holding it, and a temperature controlled cooling air (hereinafter, cold air). 1) for sending to the test room 1
4 is installed, and a cold air circulation passage 15 for circulating cold air in the preparation stage is provided. Reference numeral 16 is an electric motor for driving the blower 14. In the high temperature chamber 3, a heater 17 that heats the air in the room, a heat storage device 18 that stores the amount of heat of the heater 17 and keeps the heated air at a predetermined temperature, and temperature-controlled heating air. A blower 19 for sending (hereinafter, hot air) to the test chamber 1 is installed, and
A hot air circulation passage 20 is provided to circulate cold air in the preparation stage. 21 is an electric motor for driving the blower 19.

On the other hand, the cold air circulation passage 15 near the cold air supply port 4
The cold air circulation passage 15 is linked to the cold air switching damper 6.
A first partition plate 22 for opening and closing is provided. Further, the hot air circulation passage 20 near the hot air supply port 8 is provided with a second partition plate 23 which opens and closes the hot air circulation passage 20 in association with the hot air switching damper 10.

The cold air switching dampers 6 and 7 and the hot air switching damper 1 described above.
0 and 11 are configured to be fully opened with an acute opening angle. In this embodiment, the angle of about 45 ° is the fully opened opening angle.

The first partition plate 22 closes the cold air circulation passage 15 when the cold air switching damper 6 moves to a position where the cold air supply port 4 is opened, and cools the cold air circulation passage 15 when the cold air switching damper 6 moves to a position where the cold air supply port 4 is closed. Works to open. Also, the second
The partition plate 23 closes the hot air circulation passage 20 when the hot air switching damper 10 moves to the position where the hot air supply port 8 is opened, and opens the hot air circulation passage 10 when the hot air switching damper 10 moves to the position where the hot air supply port 8 is closed. To work.

Next, an example of the opening / closing mechanism for the cold air switching damper 6 and the first partition plate 22 will be specifically described with reference to FIG. In the figure, one end of the support shaft 6a of the cold air switching damper 6 is connected to the arm 24.
And the rod 2 of the air cylinder 26 via the connecting rod 25
It is connected to 6a. One end of the support shaft 22a of the first partition plate 22 is connected to a rod 26a of an air cylinder 26 via an arm 27 and a connecting rod 25. When the rod 26a of the air cylinder 26 is contracted, the cold air switching damper 6 at the solid line position (the position where the cold air supply port is closed) is moved to the imaginary line position via the connecting rod 25, the arm 24 and the support shaft 6a. Simultaneously with the rotation to the (open position of the cold air supply port), the first partition plate 22 at the solid line position (the position where the cold air circulation passage is open) is moved to the imaginary line via the connecting rod 25, the arm 27 and the support shaft 22a. It is adapted to rotate to a position (position to close the cold air circulation passage).

The hot air switching damper 10 and the opening / closing mechanism for the second partition plate 23 have the same structure as described above.

Next, the operation of this embodiment will be described.

The cold air generated in the low greenhouse 2 and the hot air generated in the high temperature chamber 3 are switched by the cold air switching damper 6 or the hot air switching damper 10 and are circulated in the test chamber 1 as indicated by solid line arrows, whereby the test chamber The heat shock test of the sample stored in No. 1 is performed. In this test, when the cold air switching damper 6 moves to the position where the cold air supply port 4 is opened, the first partition plate 23 closes the cold air circulation passage 15, so that the cold air flowing through the cold air circulation passage 15 is indicated by the broken line arrow. , Flows into the test chamber 1 through the cold air supply port 4 as shown by the solid line arrow. Further, when the hot air switching damper 10 moves to the position where the hot air supply port 8 is opened, the second partition plate 23 closes the hot air circulation passage 20, so that the hot air flowing through the hot air circulation passage 20 is indicated by a solid line as indicated by a broken line arrow. As shown by the arrow, the test room 1
Flow into. Therefore, even if a large amount of sample is stored in the test chamber 1, cold air or hot air will not be bypassed to the cold air circulation passage 15 and the hot air circulation passage 20, and the air volume,
Since the wind speed is not lowered, the wind is evenly applied to many samples, and the temperature change time is made uniform.

Further, since the cold air switching damper 6 and the hot air switching damper 10 are fully opened with an acute opening angle, the cold air and hot air flowing into the test chamber 1 are deflected and uniformly flow to the sample placed in the test chamber 1, That is, the temperature distribution in the test chamber 1 is made uniform. Further, by making the cold air switching damper 6 and the hot air switching damper 10 open at an acute angle, the amount of heat to the shaded portion in FIG. 2 can be reduced, and that amount can be used for cold heat of the sample, so the temperature change of the sample You can shorten the time.

In this embodiment, the cold air switching damper 6 and the first
The opening and closing of the partition plate 22 and the opening and closing of the hot air switching damper 10 and the second partition plate 23 are performed by one air cylinder respectively, but may be performed by two air cylinders separately. Of course.

〔The invention's effect〕

As described above, according to the present invention, the cold air in the low temperature chamber and the hot air in the high temperature chamber can be effectively introduced into the test chamber, and the temperature distribution in the test chamber can be made uniform.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a cold heat environment testing apparatus of the present invention, FIG. 2 is a detailed view of a switching damper part in FIG. 1, and FIG. 3 is a perspective view of an opening / closing mechanism part of a switching damper and a partition plate. . DESCRIPTION OF SYMBOLS 1 ... Test room, 2 ... Low temperature room for generating cold air, 3 ... High temperature room for generating hot air, 4 ... Cold air supply port, 6 ... Cold air switching damper, 8 ... Hot air supply port, 10 ... Hot air switching damper, 15 ... Cold air circulation passage ,
20 ... Hot air circulation passage, 22 ... 1st partition plate, 23 ... 2nd partition plate.

Claims (1)

[Claims] 1. A test chamber, a low temperature chamber for generating cold air and a high temperature chamber for generating hot air, which are independent of the test chamber, a cold air supply port for circulating the cold air of the low temperature chamber to the test chamber, and its cold air supply. A cold air switching damper for opening and closing the mouth, a hot air supply port for circulating hot air in the high temperature chamber to the test chamber, and a hot air switching damper for opening and closing the hot air supply port are provided, and the cold air switching damper and the hot air switching damper are By switching cold air or hot air through the test room to perform a cold heat test of the sample,
In addition, when the cold air switching damper and the hot air switching damper block the cold air supply port and the hot air supply port, respectively, cold air is circulated to the cold air circulation passage of the low temperature chamber and hot air is circulated to the hot air circulation passage of the high temperature chamber, respectively. In the test apparatus, a first partition plate for opening and closing the cold air circulation passage is provided in the cold air circulation passage portion near the cold air supply port, and the hot air circulation passage portion near the hot air supply port is provided. ,
A second partition plate is provided which can open and close the hot air circulation passage in conjunction with the hot air switching damper, and the cold air switching damper and the hot air switching damper are configured to be fully opened with an acute opening angle, while the first partition is provided. The partition plate is configured to close the cold air circulation passage when the cold air switching damper moves to the open position, distribute all of the cool air to the cold air supply port, and open the cold air circulation passage when the cold air switching damper moves to the closed position. And, the second partition plate closes the hot air circulation passage when the hot air switching damper moves to the open position and allows the entire amount of hot air to flow to the hot air supply port, and when the hot air switching damper moves to the closed position, the hot air circulation passage opens. A cold / heat environment testing device characterized by being configured to open.