JPS5849817B2 - Thermal atmosphere test equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention tests the durability and strength of small precision equipment, their equipment parts, electronic parts, etc. against thermal atmospheres such as thermal shock and temperature cycles by moving the sample within the test chamber. The present invention relates to a thermal atmosphere test device that allows testing to be performed by switching from a high temperature range to a low temperature range without having to perform a test.

Conventionally, in order to perform thermal shock tests and temperature cycle tests on precision instruments and their parts, the target sample has been placed in a sample support frame or a sample support frame depending on its shape. Depending on the test content, the sample is moved from a high-temperature chamber to a low-temperature chamber, or vice versa. A testing device that moves the chamber is used.

However, according to the conventional method, the sample is stored in a cage or a support frame, which causes the sample to protrude during the test, and especially when the sample is a small part, the sample may fall off.

Furthermore, with the sample moving method, since the sample moves, it is difficult to measure the sample and energize it (when testing with equipment in the energized state), and it also causes vibrations to the sample, making it difficult to obtain normal data. is difficult to obtain.

Moreover, since the support frame is moved, the mechanism becomes complicated and expensive, and handling is also inconvenient.

In addition, with the sample fixation method, it is easier to measure the sample, apply electricity, etc., and there is less vibration, but the structure and mechanism become larger because of the need to move the high temperature and low temperature chambers, which is also expensive. It is also inconvenient to handle.

As described above, the conventionally employed test apparatuses have various problems, and it is difficult to perform highly accurate tests in practice.

The present invention solves the conventional problems, and when a sample is placed in a test chamber, it is possible to provide a high or low temperature or a room temperature atmosphere to the test chamber from a heating source or a cooling source. By switching the airflow, these operations can be easily performed based on required setting conditions by external commands.

The present invention includes a low-temperature gas supply chamber equipped with a cooling means and a fan for moving the low-temperature gas cooled by the cooling means, and a high-temperature gas supply chamber equipped with a heating means and a fan for moving the high-temperature gas heated by the heating means. A test chamber that is connected to the gas supply chamber and both the high temperature and low temperature gas supply chambers through shields that can be opened and closed individually, and a means for communicating with outside air that allows outside air to be sent into the test chamber when necessary. Each gas supply chamber for the test chamber is partitioned with an insulating wall and assembled in a single box in the required arrangement, and each gas supply chamber for the test chamber has an inlet and an outlet at both ends of the test chamber. The test chamber is equipped with an insulating door that opens and closes the outlet and inlet simultaneously from the outside of the box on both the low-temperature and high-temperature sides, and a rectifier plate is installed inside the gas outlet and inlet positions of the test chamber. The outside air is introduced through a small door that can be opened and closed outside the screen or by an outside air introduction fan, and a sample entrance/exit door is provided at the front of the test chamber.

In the present invention, the opening/closing mechanism of each door is opened/closed in a predetermined order by a preset control mechanism to control the atmosphere in the test chamber from low temperature to high temperature or vice versa, or to room temperature in the middle. This made it possible to perform tests by applying the desired temperature to samples placed in the test chamber.

In addition, in the present invention, the sample is placed in the test chamber, and high or low temperature gas is circulated and tested in an atmosphere at a desired temperature. By opening and closing the door by external operation, the test chamber and each gas supply chamber can be immediately opened and closed in adiabatic manner.

Embodiments of the apparatus of the present invention will be described in detail below with reference to the drawings.

What is shown in FIGS. 1 to 5 is a typical specific example of the device of the present invention, in which the main part is surrounded by a heat insulating wall 2 and the inside of a main body 1 is shaped into a box-shaped frame of required dimensions. A test chamber 10 with a required volume is provided in the upper front position, and a low-temperature gas supply chamber 20 with a relatively large volume is arranged at the rear of this test chamber 10.
A high-temperature gas supply chamber 30 is arranged in the lower part of the test chamber 10, and a large sample opening 11 is provided at the front of the test chamber 10, to which a door 12 having heat insulation properties is attached.

Inside the test chamber 10, rectifier plates 13 made of punched metal or the like are attached on both sides with dimensions approximately the same as the width of the sample inlet/outlet 11, and a wind tunnel section 1 is formed at both ends of the test chamber 10. It is divided into 4 and 1 4'.

A low-temperature chamber 20 is formed at the rear of the test chamber 10, and an evaporator 21 of a cooler, a heater 22 for temperature control in the low-temperature range, and a fan 23 are arranged in the low-temperature chamber 20. The test chamber 10 is provided with a cold air outlet 24 and a cold air outlet 24' which penetrate through the partitioning thermal wall 2 and open into the wind tunnel sections 14 and 14', respectively. The outlet is positioned so as to face the cold air population 24.

In addition, with respect to the suction port of the fan 23 and with respect to the partitioning thermal wall body 2
'A partition plate 29 is provided between the inner surface and the evaporator 21 and the heater 22 installation part so that a cold air circulation path is formed with an appropriate interval.
is provided.

Further, the low temperature chamber 20 is located below the test chamber 10.
A high-temperature chamber 30 is formed by being partitioned from the test chamber 10 and the test chamber 10 by heat-insulating partition walls 2' and 2'', respectively. Inside this high-temperature chamber 30, there is a heater 31, a fan 32, and a suction port of the fan 32. A partition plate 33 is provided to allow the hot air that has passed through the heater 31 to be sent in and to form a circulation path when the high temperature chamber 30 is closed.
4, 14', hot air population 34 and hot air outlet 3
4', and the outlet of the fan 32 faces the hot air flow 34.

Note that the drive motors 2 3', 3 of each fan 23, 32
2' are both installed outside the chamber.

The cold air inlet 24 and outlet 24' connecting the low temperature chamber 20 and the test chamber 10 described above, and the high temperature chamber 3
0 and the test chamber 10, an inlet 34 and an outlet 34' of hot air
are equipped with cut-off doors 25, 25' and 35, 35' each having a heat insulating structure. The hot air side blocking doors 35, 35' are fixed at their base ends to the hollow shaft 36 that fits into the solid shaft 26.
A reciprocating linear drive body (for example, an air cylinder) 27, 37 and a link mechanism 27' arranged on the same axis outside the heat insulating wall body.
, 3 and 7', and each can be rotated 900 times to open and close the door.

Each of these blocking doors 25, 25' or 35, 35' is the fifth
As shown in the figure, the wind tunnel section 14 (or 14) adjacent to the test chamber 10 is configured to rotate, and the seal packing 4 is brought into contact with the heat insulating wall surface 3 to maintain airtightness. A partition door 28 or 3 that forms an appropriate heat insulating space 5 or 5' between the high temperature chamber 30 side and the chamber side depending on the thickness of the heat insulating partition wall 2', 2''.
8 is hinged to the wall at the lower base, and each of these shutoff doors 25
．． 25' (or 35, 35 and partition door 28 (or 38)
and are movably connected by connecting rods 39 at appropriate positions on their respective opposing surfaces.

Furthermore, at the front positions of both wind tunnel sections 14 and 14' of the test chamber 10, there are provided an outside air inlet/outlet 6 for bringing the test chamber 10 into a room temperature state during operation, and a door 7 for opening and closing it. Both have a structure in which the lower end is pivotally connected to a part of the main body 1, and the upper part is opened and closed at an angle by a reciprocating linear drive body 8.

A passage is connected to one outside air inlet/outlet 6 so as to be connected to the discharge side of a fan 40 for introducing room temperature attached to the outside upper part of the main body 1.

The lower part of the main body 1 is partitioned by a heat insulating wall to form a machine room 9, in which the cooling motor part of the low temperature chamber 20, its condenser, etc. are housed, and the side of the main body contains control electrical equipment, etc. are accommodated, and the blocking doors 25, 25', 35,
35', each device that operates the door 7 for introducing room temperature, and instruments that operate in conjunction with these devices are electrically connected to the control device and are also interlocked with the measuring device.

The partition walls 2' and 2'' between the test chamber 10 and the high-temperature chamber 30 and low-temperature chamber 20 are made of heat insulating material that can sufficiently cope with temperature differences and has a large heat transfer resistance. has been kept specific.

Furthermore, regarding the arrangement of each part of the device of the present invention, the above specific example is the most compact and preferable configuration;
The present invention is not limited to this, and may be configured in combination with other states as necessary.

According to the apparatus of the present invention configured as described above, the test chamber 10
Open the front door 12 of the device, place the sample inside, and leave it as it is according to the test requirements for the sample, or energize the motorized part from the outside of the device (preliminarily close the door 12).
2 or a power outlet (heat resistant,
(cold resistant) or have a sealable structure so that the lead wires can be pulled out to the outside)
For example, when performing a thermal shock test, the sample is placed in the test chamber 10 and then exposed to a high temperature (for example, 200°C) in the high temperature chamber 3.
0 and the exit 34' are opened by external operation (operation by the reciprocating linear drive body 37),
The high temperature chamber 30 is communicated with the test chamber 10, and the fan 3
2, the corresponding cha? Hot air preheated inside the bar 30 is sent into the wind tunnel section 14 from the inlet 34, and the current plate 13
The flow is rectified through the rectifying plate 13 on the opposite side of the test chamber 10, passes through the wind tunnel section 14', and returns to the high temperature chamber 30 from the outlet 34'.
The sample is maintained at a set temperature atmosphere by creating a flow that enters the sample and continuing this circulation of hot air for the required time.

At this time, the low temperature chamber 20 side is blocked 2 5 , 2
5' controls the inlet and outlet to be closed.

Immediately after the set time in this high temperature range has elapsed,
5°C), first close the outlet 34' and inlet 34 of the high-temperature chamber 30 to cut off the communication with the high-temperature chamber 30 through the respective shut-off doors 3-5.
, 3 5', and then the cold chamber 20
In order to communicate the test room 10 with the population 24 exit 24
The cut-off doors 25, 25' are opened by external operation (by the reciprocating linear drive unit 27 in the same way as for the high-temperature side), the low-temperature chamber 20 is communicated with the test chamber 10, and the fan 23 connects the inlet 24 to the outlet 24. ’ through the cold chamber 20
By circulating cold air between the test chamber 10 and the test chamber 10, the sample is maintained at a set temperature atmosphere for a required period of time, and the necessary data for the sample due to temperature changes during this period is measured, and the required data for the sample due to temperature differences is measured. You can check the external results.

In addition, to perform a temperature cycle test, for example, the temperature is gradually increased from room temperature to a high temperature for the required time, then the high temperature is maintained for the required time, and then the temperature is gradually lowered to the room temperature for the required time, then the temperature is lowered to a low temperature, and the low temperature is maintained for the required time and the temperature is lowered to the room temperature. When performing operations such as returning to room temperature, use the same procedure as above to bring the temperature to high and low temperatures, and use the wind tunnel sections 14, 14 to bring the temperature to room temperature.
'Open the doors 7, 7 provided on the front wall and drive the room temperature supply fan 40 to flow outside air into the test chamber 10,
The test involves exposing the sample to room temperature.

Note that temperature adjustment at high and low temperatures can be accurately set by adjusting the amount of heat released by the heaters 22 and 31.

Therefore, as mentioned above, an electrical control mechanism is used to control the high temperature, low temperature, or room temperature according to the predetermined test conditions, and the doors of each part of the test chamber 10 are sequentially opened and closed according to a preset program. By connecting and interlocking heat source control and measuring equipment to this, it became possible to perform various atmospheric tests.

Therefore, both the low temperature and high temperature chambers 2 are connected to the test chamber 10.
Each gas outlet and inlet with 0, 30 is provided with a blocking door 2 5 ,
Partition door 2 at 2 5' or 3 5, 3 5' respectively
8 or 38 are provided so as to be interlocked via the connecting rod 39, so that when the door is closed, a gas insulation layer is formed in the space 5 or 5' between the blocking door and the partition door within the thickness of the partition wall. This prevents heat transfer to and from the chamber side when not in use within the test chamber 1o, allowing reliable operation.

As described above, according to the present invention, a sample is placed in a test chamber, hot air is sent into the test chamber and circulated to raise the temperature, cold air is sent into the test chamber and circulated to lower the temperature, and the outside air is cooled to a low temperature. Tests can be carried out by exposing the gas to room temperature, and by switching between opening and closing the high-temperature gas supply chamber or cold gas supply chamber built into the device and the shutoff door, the desired temperature can be immediately tested. Gas can be supplied and circulated in the test chamber, temperature can be set quickly, and the sample can be tested in a fixed position, which prevents the sample from sticking out, spilling, ensuring earthquake resistance, stabilizing tests under energized conditions, and making measurements easier. Many of the problems with conventional testers, such as ease of use, have been overcome, and in addition, the stability of the circulating gas flow is measured by a current plate between the inlet and outlet of the test chamber, and the gas flow towards the sample is improved. but? By setting the temperature accuracy, the temperature accuracy is significantly improved, and the overall structure can be relatively simplified and handling becomes easier.

[Brief explanation of the drawing]

The drawings show one embodiment of the device of the present invention.
The figure is a longitudinal cross-sectional view excluding the machine housing part, Figure 2 is a plan cross-sectional view, Figure 3 is a vertical cross-sectional view taken from ■-■ in Figure 2, and Figure 4 is I in Figure 2.
FIG. 5 is an enlarged sectional view of the main part. 1...Main body, 2...Insulating wall, 2',
2"...Curved partition cut thermal wall body, 5, 5'...Insulating space section, 6...Outside air inlet/outlet, 7, 12...
・・Door, 8, 27, 37・・Curved reciprocating linear drive body, 10・
...Testing room, 11... Curved sample inlet/outlet, 13.
・・・・・・straightening plate, 1 4, 1 4'... wind tunnel section, 20... low temperature chamber, 21... evaporator of curved cooler, 22, 31... heater , 23, 32
...Song fan, 24...Cold air inlet, 24'...
Curved cold air outlet, 2 5 , 2 5' , 3 5 ,
3 5'......Block, 26, 36...Shaft, 28, 38...Partition door, 3o...High temperature chamber, 34...・Hot air inlet, 34'...
... Hot air outlet, 40 ... Room temperature supply fan.

Claims (1)

[Claims] 1. A low-temperature gas supply chamber equipped with a cooling means and a fan for moving the cooled low-temperature gas, a high-temperature gas supply chamber equipped with a heating means and a fan for moving the heated high-temperature gas, and connected to both of the gas supply chambers. A test chamber equipped with a sample entrance/exit door and an outside air communication opening/closing means that allows outside air to be sent into the test chamber when required are separated from each other by an insulating wall and combined in the required arrangement. The gas supply chamber and the outside air introduction/exhaust section each have an inlet and an outlet at both ends of the test chamber, and the outlet and inlet for each gas under each temperature condition are simultaneously opened and closed from the outside at each opening. A thermal atmosphere testing device characterized by being equipped with an insulated door and rectifying plates on both sides inside the position where gas enters and exits the test chamber.