JPS6125171B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The purpose of the present invention is to easily perform temperature tests on devices that have internal heating elements, especially large electronic computers, etc., and to test devices with a uniform temperature by effectively utilizing the heat generated by the device under test itself. It is used to obtain temperature.

2. Description of the Related Art In order to release heat generated from internal electronic circuits, large electronic devices such as computers are provided with means for sucking in cooling air through an intake port and discharging warm air through an exhaust port. When performing high-temperature tests on such devices, conventional methods include placing the entire device in a thermostatic chamber or inserting a heater into the inlet of the device, but the former requires a large thermostatic chamber that is extremely expensive. However, the latter has drawbacks such as the difficulty in inserting a heater between the device and the floor due to its dimensions, and the fact that the self-heating of the device is not effectively utilized. In addition, as a method of utilizing the self-heating of the device, in the case of a forced air cooling method, it is possible to stop the blower fan inside the device, but this has the drawback of creating a temperature difference between the upper and lower portions of the device.

The present invention aims to solve the above-mentioned problems, and will be explained in detail below with reference to the drawings.

FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention. In the figure, reference numeral 1 denotes a device under test, which has an electronic circuit 11 as a heat generating section, a blower fan 12, an air intake port 13, and an exhaust port 14. Reference numeral 2 designates an air circulation device according to the present invention, including a circulation intake port 21 located near the exhaust port 14 of the device under test 1;
Circulation exhaust port 22 and ventilation fan 2 located near 3
3, a heater 24, dampers 25, 26, an exhaust fan 27, and an intake port 28. Also, 3 is a top plate to increase circulation efficiency.

During normal operation of the device under test 1, indoor air or cooling air from under the floor is sucked in by the fan 12 and discharged from the exhaust port 14 into the room or into the exhaust duct.

During a high temperature test, an air circulation device is positioned as shown in the figure, and the temperature is raised by circulating air as shown by the arrow. A heater 24 may also be used to speed up the temperature rise.

In addition, if the temperature rises too much or if a room temperature test is to be performed, the circulation path is blocked by the damper 25, exhaust is performed by the exhaust fan 27, and the damper 26 is opened to suck in room air, as shown in Figure 2. .

FIG. 3 is a top view of the above embodiment, and the air circulation device 2 has a plurality of units 2a, 2b, 2c, . . . 2d, 2e, 2f, . . . along the longitudinal direction of the device under test.
It is divided into ..., and one of them (for example, 2a)
becomes the master unit, and the others become slave units. The master unit centrally controls the temperature abnormality detection system and interfaces with external devices, and any number of slave units can be connected by simply inserting a cord into the master unit. Therefore, depending on the length of the device under test 1, a necessary number of slave units can be connected and tested.

It is also possible to operate the entire computer and test only some devices at high temperatures.

Furthermore, since the structure is simple, it is easy to disassemble and assemble, and testing can be performed even at the destination where the device is delivered.

In addition, in the case of an under-floor air conditioning system, the efficiency of this system will be better if the floor holes are blocked, but if the airtightness between the device under test 1 and the air circulation device 2 is maintained above a certain level, the floor holes should be blocked. Naturally, the intrusion of cold air can be ignored.

As described above, the present invention utilizes the heat generated by the device itself, so it has the great effect of being able to perform high-temperature tests with energy savings, and also allowing for flexible usage as described above.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, with FIG. 1 being a sectional view during circulation, FIG. 2 being a sectional view during opening, and FIG. 3 being a top view. In the figure, 1 is the device under test, and 2 is the air circulation device.

Claims (1)

[Claims] 1. In a temperature test method for a device under test that has heat-generating parts inside and is configured such that cooling air supplied from the outside is taken in from the intake port and exhausted from the exhaust port to cool the inside, air is supplied to the device under test. A circulation device is installed, and the air circulation device has a blowing means for circulating the exhaust air from the exhaust port of the device under test to the intake port, thereby obtaining a high temperature by utilizing the heat generated by the device under test itself. A temperature test method characterized by: