JP4937149B2 - Temperature test apparatus and method - Google Patents

Description

  The present invention relates to a temperature apparatus and method for performing a temperature test using a test tank in which a liquid having a predetermined temperature is stored, and more particularly to a temperature test apparatus and method capable of performing a temperature test at a plurality of temperatures.

When performing temperature tests on various parts and materials, conventionally, a test tank filled with a liquid such as oil set to a predetermined test temperature has been used. When performing a temperature test at a plurality of temperatures using such a test tank, it is usual to use a plurality of test tanks having different set temperatures. However, it takes time and cost to separately manage the temperature conditions for each test tank. In particular, when the test takes a long time (for example, one year), the time and cost are great. Patent Document 1 discloses a temperature characteristic test apparatus for testing temperature characteristics of a device under test such as an IC device.
Japanese Patent Laid-Open No. 5-288801

  The present invention has been made in view of the above points, and by connecting a plurality of test tanks used for a temperature test, it is possible to perform a temperature test at a plurality of temperatures while performing temperature control of each test tank collectively. An object is to provide a possible temperature test apparatus and method.

A first invention is a temperature test apparatus including a test tank for storing a liquid set at a predetermined temperature, and capable of performing a temperature test by immersing a device under test in the liquid,
A plurality of the test chambers are connected in series,
A radiator is interposed between adjacent test chambers,
A temperature test apparatus comprising: a pump that circulates the liquid through the plurality of test tanks through the radiator; and a heater that heats the liquid.

A second invention is a temperature test apparatus comprising a test tank for storing a liquid set at a predetermined temperature, and capable of performing a temperature test by immersing a device under test in the liquid,
A plurality of the test chambers are connected in series,
A radiator is interposed between adjacent test chambers,
A temperature test apparatus comprising: a pump that circulates the liquid through the plurality of test tanks through the radiator; and a cooling unit that cools the liquid.

A third invention is the temperature test apparatus according to the first or second invention,
The temperature test apparatus is characterized in that the test tank is a closed tank.

A fourth invention is the temperature test apparatus according to the third invention,
The temperature test apparatus is characterized in that the test tanks are stacked and installed in the vertical direction.

A fifth invention is the temperature test apparatus according to the fourth invention,
A temperature test apparatus characterized in that a valve is provided in a pipe line connected to the upper test tank for each of the test tanks below the uppermost stage.

  By connecting a plurality of test tanks used for the temperature test, it is possible to perform a temperature test at a plurality of temperatures while performing temperature management of each test tank at once.

  FIG. 1 is an overall configuration diagram of a temperature test apparatus 1 according to an embodiment of the present invention. As shown in FIG. 1, the temperature test apparatus 1 includes a heater 10, a plurality of test tanks 21 to 24, a plurality of radiators 31 to 33, and a pump 40. The test tanks 21 to 24 are connected in series, and radiators 31 to 33 are interposed between adjacent test tanks, respectively. The suction port of the pump 40 is connected to the fourth test tank 24, and the discharge port is connected to the heater unit 10. After the predetermined liquid discharged from the pump 40 is heated by the heater 10, the first The test tank 21 circulates as follows: first radiator 31 → second test tank 22 → second radiator 32 → third test tank 23 → third radiator 33 → fourth test tank 24 → pump 40. The predetermined liquid (hereinafter referred to as “test liquid”) is a liquid that fills the test tanks 21 to 24 and maintains the temperature of the DUT installed in each test tank at a predetermined temperature. For example, oil such as silicon oil, water, alcohol and the like. That is, in the test tanks 21 to 24, the test object is held at the temperature of the test liquid by immersing the test object in the test liquid stored in each of the test tanks 21 to 24. In order to prevent the test subject from directly touching the test solution, for example, the test subject is placed in a sealed container and then immersed in the test solution.

  In addition, in FIG. 1, although it has shown about the case where the 1st-4th four test tanks 21-24 are provided, not only this but an appropriate number of test tanks can be provided. Moreover, the test tanks 21 to 24 may be provided with a temperature sensor that detects the temperature of the test liquid in each of the test tanks 21 to 24.

  As described above, the radiators 31 to 33 are installed between the test tank 21 and the test tank 22, between the test tank 22 and the test tank 23, and between the test tank 23 and the test tank 24. The test liquid flowing out from the upstream test tank is cooled to the test temperature in the downstream test tank. That is, if the test temperatures of the test tanks 21 to 24 are T1 to T4 (where T1> T2> T3> T4), the heater 10 heats the test liquid to the temperature T1, and the first radiator 31 The test liquid at the temperature T1 of the first test layer 21 is cooled to the temperature T2 and supplied to the second test tank 22, and the second radiator 32 cools the test liquid at the temperature T2 of the second test layer 22 to the temperature T3. The third radiator 33 cools the test liquid at the temperature T3 in the third test tank 23 to the temperature T4 and supplies it to the fourth test tank 24. The radiators 31 to 33 may include means for adjusting the heat release amount of the test liquid, such as a blower.

  When each of the test tanks 21 to 24 is provided with a temperature sensor for detecting a liquid temperature and the radiators 31 to 33 are provided with means for adjusting a heat release amount, the temperature can be controlled as follows. That is, for the heater 10, the liquid temperature in the first test tank 21 is monitored, and heating control is performed so that the liquid temperature becomes the temperature T1. Moreover, about each radiator 31-33, control of the thermal radiation amount by a thermal radiation amount adjustment means is performed according to the liquid temperature of the downstream test tank. For example, in the case of the first radiator 31, the amount of heat radiation is controlled so that the liquid temperature of the second test tank 22 downstream thereof is T2.

  As described above, according to the present embodiment, a plurality of test tanks filled with the test liquid are connected, and the test liquid is circulated to each test tank while adjusting the temperature to an appropriate temperature. Since the temperature test of a plurality of temperatures can be performed while performing the temperature management of the plurality of test tanks 21 to 24 collectively, it is possible to simplify the temperature condition management.

  By the way, in this embodiment, each test tank 21-24 with which the temperature test apparatus 1 is provided is good also as a sealed tank. In this case, it is possible to prevent problems such as volatilization and deterioration of the test solution, and problems such as spillage of the test solution and foreign matters entering the test solution.

  In the temperature test apparatus 1 including such sealed test tanks 21 to 24, the test tanks 21 to 24 may be arranged in the vertical direction as shown in FIG. In terms of functionality, although the test tanks are arranged in the vertical direction or in the horizontal direction, the installation space can be reduced by overlapping the test tanks in the vertical direction. In this case, valves 212, 222, and 232 are respectively installed between the test tanks below the uppermost test tank 24, that is, between the lower three test tanks 21 to 23 and the radiators 31 to 33. For example, when the lid 211 is opened in order to install the device under test in the tank of the test tank 21, the test liquid in the upper test tank 22 is allowed to close in the test tank 21 by closing the valve 212 in advance. This prevents the test liquid from overflowing from the lid 211 of the test chamber 21. Similarly, when the lid 221 of the test tank 22 is opened, the valve 222 is closed, and when the lid 231 of the test tank 23 is opened, the valve 232 may be closed.

  As described above, when the temperature test apparatus 1 includes the sealed test tanks 21 to 24, foreign matter enters the test tanks 21 to 24, the test liquid evaporates, and the test liquid touches the air and deteriorates. So that unattended management is possible. This is very convenient when conducting long-term tests over one year. Moreover, the occupation area of a test apparatus can also be small by arrange | positioning the test tanks 21-24 in the perpendicular direction.

  Instead of the valves 212 to 232, a check valve that allows only the flow in the direction from the lower test tank to the upper test layer and prevents the reverse flow may be provided. In this case, it is not necessary to close the valve every time the lids 211 to 231 are opened.

  FIG. 3 is an overall configuration diagram of a temperature test apparatus 2 which is another embodiment of the present invention. The temperature test apparatus 2 performs a temperature test at a temperature lower than the environmental temperature, and has a configuration in which a cooling unit 15 is provided in place of the heater 10. Further, the temperatures T1 to T4 of the first test tank to the fourth test tank are in the relationship of T1 <T2 <T3 <T4 contrary to the first embodiment, and the radiator 31 is a test solution in the upstream test tank. Is heated by heat exchange with ambient air and supplied to the downstream test chamber.

  In addition, the description of the above embodiment is for facilitating understanding of the present invention, and does not limit the present invention. It goes without saying that the present invention can be changed and improved without departing from the gist thereof, and that the present invention includes equivalents thereof.

1 is an overall configuration diagram of a temperature test apparatus 1 according to an embodiment of the present invention. It is a perspective view of the embodiment of the present invention. It is a whole block diagram of the temperature test apparatus 2 which is another embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Temperature test apparatus 2 Temperature test apparatus 10 Heater 15 Cooling part 21 1st test tank 211 Lid 212 Valve 22 2nd test tank 221 Lid 222 Valve 23 3rd test tank 231 Lid 232 Valve 24 4th test tank 241 Lid 31 1st Radiator 32 Second radiator 33 Third radiator 40 Pump

Claims (6)

A temperature test apparatus comprising a test tank for storing a liquid set at a predetermined temperature, and capable of performing a temperature test by immersing a device under test in the liquid,
A plurality of the test chambers are connected in series,
A radiator is interposed between adjacent test chambers,
A temperature test apparatus comprising: a pump that circulates the liquid through the plurality of test tanks through the radiator; and a heater that heats the liquid. A temperature test apparatus comprising a test tank for storing a liquid set at a predetermined temperature, and capable of performing a temperature test by immersing a device under test in the liquid,
A plurality of the test chambers are connected in series,
A radiator is interposed between adjacent test chambers,
A temperature test apparatus comprising: a pump that circulates the liquid through the plurality of test tanks so as to circulate through the radiator; and a cooling unit that cools the liquid. The temperature test apparatus according to claim 1 or 2,
A temperature test apparatus, wherein the test tank is a sealed tank. The temperature test apparatus according to claim 3, wherein
A temperature test apparatus, wherein the test tanks are stacked and installed in a vertical direction. The temperature test apparatus according to claim 4, wherein
A temperature test apparatus characterized in that a valve is provided in a pipe line connected to the upper test tank for each of the test tanks below the uppermost stage. A temperature test method for performing a temperature test of a device under test using a test tank for storing a liquid set at a predetermined temperature,
Connecting a plurality of the test chambers in series;
A radiator is interposed between the adjacent test chambers,
Circulating the liquid to circulate through the radiator to the plurality of test tanks;
A temperature test method, wherein a test object is installed in the plurality of test tanks.

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