JPH033717Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an environmental test chamber in which various tests are carried out while maintaining a low pressure inside the room, and particularly to an environmental test chamber provided with an entrance for accessing small items.

[Prior Art] Performance tests of automobiles, etc., which are intended to be driven at high altitudes with low atmospheric pressure, are conducted by housing the automobile, etc. in a test chamber in which the indoor air pressure is maintained at a low pressure.

In such environmental test chambers, a front room (small room) is set up exclusively for exit so that workers can leave safely in the event of a sudden drop in the atmospheric pressure in the test chamber or in the event of a fire outbreak. . Workers enter and leave the environmental test chamber through this anteroom, after adjusting the pressure in the anteroom.

By the way, if there is a shortage of small items such as tools during work in the test room, conventionally the test room has been used to enter and exit through the front room to secure the small items.

[Problem that the invention aims to solve] In this way, in the past, when there was a shortage of small items such as tools, or when a small item was forgotten, workers in the test chamber entered and exited through the front room and secured the small item. The problem was that workability was poor because it took time (about 20 minutes) to adjust the pressure in the front chamber.

The present invention was proposed in order to solve these conventional problems, and aims to provide an environmental test chamber in which small items can be taken in and out with ease.

[Means for solving the problem] In order to achieve this purpose, the environmental test chamber of the present invention has the following features:
An airtight accessory entrance having a door on the low pressure side and a door on the atmospheric pressure side is provided between the low pressure side and the atmospheric pressure side of the normal pressure side of the test chamber, and a first opening having a first pressure regulating valve in the middle part is provided. Insert one end of the ventilation pipe into the accessory slot and open the other end to the low pressure side,
It is characterized in that one end of a second ventilation pipe having a second pressure regulating valve in the middle thereof is inserted into the accessory opening and exit, and the other end is opened to the atmospheric pressure side.

[Function] Therefore, in the present invention, the pressure inside the small-sized small item loading/unloading port is equalized, and this small item loading/unloading port is used to take small items in and out of the low-pressure chamber, so work efficiency is improved compared to the conventional method. do.

[Example] Hereinafter, an example of the present invention will be described in detail based on the drawings.

FIG. 1 is a diagram showing the main parts of an environmental test chamber according to an embodiment of the present invention.

In Fig. 1, a low-pressure test chamber 1, which is kept at a low pressure below atmospheric pressure, and a normal-pressure chamber 2, such as a measurement chamber, whose interior is at normal pressure (atmospheric pressure) are separated by a separation wall 3. This isolation wall 3 is provided with an opening 4 for taking in and taking out small items.

A door 5 is provided on the low pressure test chamber 1 side and a door 6 is provided on the normal pressure chamber 2 side of the small item inlet/outlet 4. By closing these doors 5 and 6, the small item inlet/outlet 4 becomes airtight. Become.

In addition, one end (open end) of a ventilation pipe 9 with a pressure regulating valve 8 provided in the middle is inserted into the side wall 7 of the accessory entrance/exit 4, and the other end of this ventilation pipe 9 is open to the low pressure test chamber 1. ing. The above pressure regulating valve 8 is the low pressure test chamber 1
It is located inside.

In addition, one end (open end) of a ventilation pipe 11 provided with a pressure regulating valve 10 in the middle is inserted into the side wall 7,
The other end of the ventilation pipe 11 is open into the normal pressure chamber 2.
This pressure regulating valve 10 is provided within the normal pressure chamber 2.

Also, in the low pressure test chamber 1 and the normal pressure chamber 2, there are barometers 12 and 13 that measure the atmospheric pressure inside the accessory opening 4.
are provided for each. The barometer 12 on the side of the low-pressure test chamber 1 is connected to the pipe line 1, which has an on-off valve 14 in the middle.
5, and the other end of the conduit 15 is inserted into the accessory slot 4 through the side wall 18. Moreover, the barometer 13 on the side of the normal pressure chamber 2 is connected to one end of a conduit 17 provided with an on-off valve 16 in the middle thereof, and the other end of the conduit 17 is inserted into the small article loading/unloading port 4 .

By using the small article loading/unloading port 4 constructed in this way, the test chamber 1 can be moved from the normal pressure chamber 2 on the atmospheric pressure side to the test chamber 1 on the low pressure side.
To put small items in, do the following.

Normally, the pressure regulating valves 8 and 10 are closed, and the doors 5 and 6 are also closed. First, the pressure regulating valve 10 is opened to equalize the pressure inside the small article loading/unloading port 4 with atmospheric pressure.
Then, the door 6 is opened as shown by the broken line, the small item is put into the small item slot 4, and the door 6 is closed again. Next, the pressure regulating valve 10 is closed and the pressure regulating valve 8 is opened to equalize the pressure in the small article loading/unloading port 4 with that in the low pressure test chamber 1.
Then, the door 5 is opened, the small item is taken out from the small item slot 4, and the door 5 is closed. Next, the pressure regulating valve 8 is closed.

Here, it is necessary to equalize the pressure inside the small item loading/unloading port 4 to take the small items in and out.If there is a difference in air pressure, the doors 5 and 6
due to not opening.

Next, when taking out small items from the low pressure test chamber 1 side to the normal pressure chamber 2 side, proceed as follows.

First, the pressure regulating valve 8 is opened to equalize the pressure in the small article loading/unloading port 4 with that in the test chamber 1. Then, the door 5 is opened, the small item is put into the small item slot 4, and the door 5 is closed. Next, the pressure regulating valve 8 is closed, and the pressure regulating valve 10 is opened to equalize the pressure inside the accessory opening 4 with the atmospheric pressure. Open the door 6, take out the small items from the small item slot 4, and then close the door 6.
Close. After that, the pressure regulating valve 10 is closed.

As described above, since the environmental test chamber is provided with the inlet/outlet 4 exclusively for taking in and taking out small items, work efficiency is greatly improved compared to the conventional method of taking in and out of small items using the front chamber.

Note that automatic valves may be used as the pressure regulating valves 8 and 10 described above, and a series of operations may be performed automatically.

[Effects of the Invention] As explained above, in the present invention, a small article inlet/outlet having a much smaller volume than the front chamber is provided between the low pressure chamber and the normal pressure chamber. Since the pressure inside this small-volume small-item inlet/outlet can be adjusted in a short time, by using this small-item inlet/outlet to put in and take out small items, work efficiency is improved compared to the conventional method.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the main parts of an environmental test chamber according to an embodiment of the present invention. In the figure, 1...Low pressure test chamber, 2...Normal pressure chamber, 3...
...Isolation room, 4...Accessory entry/exit, 5, 6...
Door, 7, 18... side wall, 8, 10... pressure regulating valve,
9,11...Vent pipe, 12,13...Barometer, 1
4, 16...Opening/closing valve, 15, 17...Pipe line.

Claims (1)

[Scope of utility model registration request] In an environmental test chamber where the indoor pressure is maintained at low pressure, between the low pressure side of the test chamber and the atmospheric pressure side of the normal pressure chamber,
An airtight accessory opening with a door on the low pressure side and a door on the atmospheric pressure side is provided, one end of a first ventilation pipe having a first pressure regulating valve in the middle is inserted into the accessory opening, and the other end is connected to the low pressure side. An environmental test chamber characterized in that one end of a second ventilation pipe is opened to the side and has a second pressure regulating valve in the middle thereof, and the other end is opened to the atmospheric pressure side.