JP2558552Y2 - Temperature cycle device - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention performs a thermal shock test for examining the thermal shock resistance of various articles, and performs a failure diagnosis and a screening of the articles by giving various kinds of temperature changes to the various articles. Temperature cycling apparatus used for the above.

[0002]

2. Description of the Related Art When performing a thermal shock test or a failure diagnosis or screening of an article using a temperature cycling apparatus of this kind, the temperature in a test chamber for accommodating an article is raised from one temperature to the next predetermined temperature. The time until the change is variously defined, and it is desirable that the temperature change can be completed as quickly as possible so as to respond to the demands of such various temperature changes. It is assumed that

[0003]

However, in a conventional temperature cycling apparatus, a test tank for storing articles is usually provided with a heat insulating material outside an inner tank made of a metal plate such as stainless steel. Since the inner tank is formed of a single layer, if hot air or cold air is supplied into the test tank in order to make the inside of the test tank a predetermined temperature atmosphere, FIG.
As shown in FIG.
Large heat transfer occurs in a short period of time between I and I. In fact, not only the inside of the inner tank, but also the entire heat insulating material surrounding the inner tank changes the temperature in the same way. I need it. In order to obtain a desired temperature change in a shorter time, a large-capacity heat source for heating and cooling is required. Either way, efficiency is poor.

[0004] Therefore, the present invention provides a high-temperature air generating tank and a low-temperature air generating tank.
An air generating tank, the high-temperature air generating tank and the low-temperature air generating tank.
A test tank adjacent to both tanks of the raw tank and the high-temperature air generating tank
The high-temperature air to be generated is circulated between the generating tank and the test tank.
Low-temperature air to be circulated or generated in the low-temperature air generation tank
Gas to circulate between the generating tank and the test tank.
A temperature switch having a mechanism for switching the circulating air in the test chamber.
It is an object of the present invention to provide a temperature cycle device that can efficiently change a test tank to a desired temperature in a short time and can meet specifications such as tests of various articles.

[0005]

According to the present invention, there is provided a high-temperature air generating tank, a low-temperature air generating tank,
Test adjacent to both the gas generation tank and the low-temperature air generation tank
And a high-temperature air generated in the high-temperature air generation tank.
Circulate between the raw tank and the test tank, or
The low-temperature air generated in the gas generation tank and the test tank
Switch the circulating air in the test tank so that it circulates between
At least one of the inner tank walls of the test tank.
Part of the air circulating in the test tank
A temperature cycle device having a wall structure is provided.

[0006]

According to the device of the present invention, in order to change the temperature in the test chamber from one temperature to the next predetermined temperature, circulation in the test chamber is performed.
It is generated in a high-temperature air generation tank by a ring air switching mechanism.
Cold air generated in a hot or cold air generating tank
Test with a high-temperature air generation tank and a test tank or a low-temperature air generation tank
Circulate between the tank. Test tank hot air or cold air
When circulated through the inside of the test tank, the air
In the part, the flow mainly flows to a larger part of the space inside the double wall , and since the heat transfer section is increased due to the air layer between the double walls, As illustrated in FIG. 2A, heat conduction or heat transfer from the inside to the outside heat insulating material is delayed as compared with the conventional single-wall structure, and the temperature in the inner tank changes more quickly. In FIG. 2, W1,
W2 indicates a double wall of the inner tank, and A indicates an air layer between the walls W1 and W2.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A thermal shock test apparatus according to an embodiment of the present invention will be described below with reference to FIG. This device comprises a test tank 1,
It has a high-temperature air generation tank 2 connected above the test tank and a low-temperature air generation tank 3 connected below the test tank. The high-temperature air generating tank 2 includes a heater 21 and an air circulation fan 22. When the high-temperature air is exposed, the damper 2 facing the test tank 1 is exposed.
By opening 3, 24, hot air of a predetermined high temperature can be circulated through the test tank and the high-temperature tank.

The low-temperature air generating tank 3 is provided with a cooler 31, a temperature control heater 32 and an air circulation fan 33. When the low-temperature air is exposed, dampers 34 and 35 facing the test tank are opened.
A predetermined low-temperature cold air can be circulated through the test tank and the low-temperature tank. The test tank 1 includes an inner tank 11 and a heat insulating material layer 1 outside the inner tank 11.
2 inclusive. The heat insulating tank 12 also surrounds the high temperature tank 2 and the low temperature tank 3. The inner tank 11 is composed of a stainless steel plate 11a having a ceiling portion on the side of a heat insulating material and an inner stainless steel plate 11b arranged in parallel with a space therebetween, and a floor portion of the stainless steel plate 11a on the side of the heat insulating material. Body 11c
And an inner stainless steel plate 11d which is arranged in parallel with a space therebetween. The side surface and the back surface are made of a single-layer stainless steel plate 11e. The front surface can be opened and closed by a heat insulating door (not shown).

According to the apparatus of this embodiment, for example, the test tank 1
In the case where the test object 4 arranged in the low-temperature exposure is switched from the low-temperature exposure to the high-temperature exposure, the air circulation ports of the low-temperature air generation tank 3 are closed by dampers 34 and 35 as shown in FIG. The dampers 23 and 24 are opened, high-temperature air at a predetermined temperature is supplied from the tank 2 to the test tank 1, and the air is circulated between the test tank and the high-temperature tank 2 to expose the test object 4 to a high temperature.

In this high-temperature exposure, a part of the high-temperature air supplied from the high-temperature air generation tank 2 flows at a low speed between the double walls 11a and 11b of the test tank ceiling and the floor and between the double walls 11c and 11d. However, most of the high-temperature air flows at a higher speed inside the double wall, that is, in the space where the test object 4 is arranged. Thus, in the portion of the double wall structure at the ceiling and the floor of the test tank 1, high-temperature air mainly flows through a large portion of the space inside the double wall, and the air between the double walls is further increased. Due to the increased heat transfer space due to the layers, the heat conduction or heat transfer to the heat insulating material 12 outside the double-walled portion is, as shown in FIG. As compared with the case of the single-layer structure, the temperature inside the test tank quickly rises to a predetermined temperature. In addition, it is not necessary to employ a heater 21 having a larger capacity or a fan 22 having a large air volume as compared with the related art in such a rapid temperature rise.
Therefore, the temperature of the test tank can be efficiently raised to the predetermined temperature.

When the test object 4 is exposed to the low temperature, the dampers 23 and 24 of the high-temperature air generation tank 2 are closed, and the dampers 34 and 35 of the low-temperature air generation tank 3 are opened instead.
The low-temperature air of a predetermined temperature generated in the above may be circulated between the tank 3 and the test tank 1 to expose the test object 4 at a low temperature. Even in this low temperature exposure, part of the low temperature air is
Most of the low-temperature air flows between a and 11b and between 11c and 11d, and flows into a space where the test object 4 exists, and the test object 4 can be quickly and efficiently lowered to a predetermined low temperature.

As described above, according to the apparatus of the embodiment, heat transfer to a portion that does not need to be changed in temperature, such as a heat insulating material, is suppressed, and the heat source is used while being concentrated on a change in air temperature in the test tank 1. it can. Therefore, even if the capacity of the heat source is not increased, and even if it is reduced, the inside of the test tank 1 can be quickly changed to the predetermined temperature, and the variation in the temperature distribution in the test tank can be reduced.

The present invention is not limited to the above embodiment, but can be implemented in various other modes. For example, the portion having the double wall structure in the inner tank of the test tank is not limited to the ceiling and the floor as in the above-described embodiment, and if necessary, other portions or the ceiling and the floor may be used. In addition, other portions may have a double wall structure.

[0014]

[Effect of the invention] According to the invention, the high-temperature air generation tank
A hot air generation tank, the high temperature air generation tank and the low temperature air
A test tank adjacent to both of the generating tanks and the high-temperature air generating tank
Between the generating tank and the test tank
Low temperature circulated or generated in the low temperature air generation tank
So that air is circulated between the generating tank and the test tank.
A mechanism for switching the circulating air in the test chamber.
It is a cycle device that can change the test tank to the desired temperature efficiently and in a short time without complicating the structure especially compared with the conventional temperature cycle device, It is possible to provide a temperature cycle device that can respond.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 (A) is a diagram showing a state of heat transfer to a test tank heat insulating material in the device of the present invention, and FIG. 2 (B) is a similar explanatory diagram in a conventional device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Test tank 11 Inner tank, 11a, 11b Double plate body constituting inner tank ceiling part B Inner tank floor part 11c, 11d Double plate body constituting inner tank floor part 2 High temperature air generation tank 3 Low temperature air generation tank 4 DUT

Claims (1)

(57) [Scope of request for utility model registration] 1. A high-temperature air generating tank, a low-temperature air generating tank,
Next to both the high-temperature air generation tank and the low-temperature air generation tank
The test tank in contact with the high temperature air generated in the high temperature air generation tank
Circulating air between the generating tank and the test tank; or
The low-temperature air generated in the low-temperature air generation tank is
Circulating air in the test tank so as to circulate
And a mechanism for switching the air pressure.
At least part of the air circulating in the test tank
Temperature cycle characterized by a double wall structure
apparatus.