JP3024325B2 - Liquid tank type thermal shock test equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid tank type thermal shock test apparatus for testing the characteristics of electric and electronic parts against thermal stress, and more particularly to a liquid tank of the apparatus which adheres to a sample basket or the like during a test operation. The present invention relates to a liquid tank type thermal shock test apparatus capable of recovering a heat medium liquid carried out.

[0002]

2. Description of the Related Art The heat transfer fluid in a liquid tank type thermal shock test apparatus includes a heat transfer fluid for a low temperature and a heat transfer fluid for a high temperature. . The fluorine-based inert liquid is cooled or heated to a required temperature, respectively, and is stored in a low-temperature tank and a high-temperature tank, respectively, installed in the lower part of the apparatus casing.

[0003] The thermal shock test for a sample such as an electric / electronic part is performed by alternately immersing a sample basket contained in a sample basket into each tank via a transporting means. At this time,
The tank on which the sample is immersed is covered with an opening / closing lid.

By the way, during the test operation, when the sample basket is pulled up from the tank, the heat medium liquid in the tank is attached to the sample basket or the sample that has just been lifted, and this heat is transferred to the tank while the other tank is moving. There is a problem in that it drips down on the heat insulating portion that partitions between the heat insulating portion and the tank and contaminates the upper surface of the heat insulating portion, or flows in the heat insulating portion and then mixes into the other tank.
In particular, if it is a high-temperature heat medium liquid and flows into a low-temperature tank, the low-temperature heat medium liquid may be remarkably deteriorated, and even a normal test may not be performed.

In view of the above, Japanese Patent Application Laid-Open Publication No. Hei 2-203243 has proposed a means for recovering a falling heat medium during the movement of a sample basket. In this method, a bat inclined toward the high-temperature tank is provided above both the low-temperature tank and the high-temperature tank, and the heat medium flowing down from the sample basket is received by the bat once regardless of whether it is for low-temperature or high-temperature use. The mixture of the two is poured into the liquid separators arranged side by side, and fractionated into the respective heat transfer fluids by utilizing the difference in boiling point between the heat transfer liquids. This is a collecting means that is returned to.

[0006]

However, the above-mentioned collecting means has not been general because there is a concern that the entire apparatus becomes complicated and the cost increases. The present invention has been made in view of the above circumstances, and has as its object to propose a heat medium liquid collecting means based on a completely different idea from the above-mentioned collecting means, and to provide a liquid tank type thermal shock test apparatus equipped with the same. Things.

[0007]

That is, a feature of the present invention that meets the above-mentioned object is that a low-temperature tank and a high-temperature tank, each storing a heat transfer fluid, are arranged at required intervals in a lower portion of the casing.
The sample basket hanging from the opening / closing lid is reciprocated between the two tanks, soaked alternately in the low-temperature tank and the high-temperature tank, and the opening / closing lid on the upper part of the sample basket is covered with the upper opening of each tank. In the liquid tank type thermal shock test device, a liquid recovery gutter is provided on the upper surface of the intermediate heat insulating portion of both the tanks, and both ends thereof have a size substantially reaching the inner ends of the upper openings of the both tanks, and the intermediate portion is supported. In addition, the lid is arranged so that it can be alternately tilted by pressing the lid edge portion by lowering the lid.

[0008]

According to the present invention, when the sample basket descends into each tank, the open / close lid is lowered together, and the edge thereof presses the end of the liquid collecting gutter, and the entire liquid collecting gutter is pressed. The side end is inclined downward. Thereby, the heat transfer medium dripping from the sample basket or the like moving between the tanks is received by the liquid collection gutter inclined as described above, flows through the liquid collection gutter,
The sample basket flows into the tank on the side where it was immersed, and is collected without polluting the heat insulating part.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram of a liquid tank type thermal shock test apparatus of the present invention. In the figure, (1) shows a casing of the test apparatus main body, and a low-temperature tank (2) and a high-temperature tank (3) are installed at a required distance from each other in a lower part of the casing (1). In both tanks (2) and (3), fluorine inert liquids having different boiling points are stored as a low-temperature heat medium liquid and a high-temperature heat medium liquid, respectively.
C., the latter being heated to, for example, 150.degree. C., allowing a thermal shock test on the sample.

The test is carried out by alternately immersing sample baskets (4) containing samples of electric and electronic parts in the heat medium in each of the tanks (2) and (3). Basket (4)
At the same time as entering into the tank (2 or 3), the upper end opening (5) of the tank (2 or 3) is covered with an opening / closing lid (6) and is closed.

For this purpose, the opening / closing lid (6) and the sample basket (4)
Are vertically connected by a wire (7), and both are alternately transported to the tanks (2) and (3) by the transport device (8). As the transfer device (8), a known device is applied. For example, in this embodiment, a horizontal movement guide (9) is provided in an upper portion inside the casing (1), and the inside of the horizontal movement guide is connected to the opening / closing lid. When a horizontal moving body (not shown) suspended from (6) reciprocates and comes over each of the tanks (2) and (3), a wire (10) connecting the moving body and the opening / closing lid (6) is formed. )
In addition, a structure is adopted in which the wire (7) is extended and the sample basket (4) descends into the tank (2 or 3).

On the other hand, in the figure, a low-temperature tank (2) and a high-temperature tank (3)
The space between them is a heat insulating part (11) in which a heat insulating material and the like are accommodated.
The liquid recovery gutter (12), which is a main part of the present invention, is installed on the upper surface of the heat insulating part (11). The liquid collecting gutter (12) is, for example, as shown in FIG. 4, and the bottom plate (14) slightly protrudes at both ends (13) and (13) which are open ends.
On both sides, a side plate (15) is provided on one side, and a weight ball rail (16), which will be described in detail later, is provided on the other side. The size of the bottom plate (14) is such that the length is substantially equal to the interval between the tanks (2) and (3) in the heat insulating part (11), and the width is slightly larger than the width of the sample basket (4). It has become.

The lower surface of the bottom plate (6) in the longitudinally intermediate portion is supported by a shaft (17) and a bearing (18) so as to be tiltable. Further, the bearing (18) is provided with the heat insulating portion (1).
1) It is arranged on the upper surface, at an intermediate portion between the tank (2) and the tank (3), and thereby, both ends (1) of the liquid collecting gutter (12) are provided.
3) and (13) extend so as to substantially reach the inner ends of the upper ends (5) and (5) of both tanks (2) and (3), and if they are tilted to one side, the lower end (13) Is in contact with the periphery of the opening (5) of the tank (2 or 3).

By the way, the opening / closing lid (6) is used to tilt the liquid collecting gutter (12). That is, the edge (19) of the opening / closing lid (6) is formed slightly wider than the opening (5) covering the tank (2 or 3) in this case. When descending in the direction of the tank (2 or 3), the lower surface of the edge (19) and the upper surface of the end (13) of the liquid collecting gutter (12) can be brought into contact. Of course, this is the opening and closing lid (6) edge (19)
May be of a normal size, and instead, the both ends (13) and (13) of the liquid collecting gutter (12) may be made slightly longer so as to make contact between them. The end (1) of the liquid collecting gutter (12)
The opening / closing lid (6) in contact with (3) pushes down the end (13) to move the liquid collecting gutter (12) to the tank (2 or 3) opening (5) on the sample basket (4) immersion side. 1 and the end (13) of the gutter (12) is opened / closed (6) as shown in FIG.
It can be stopped while being sandwiched between the edge (19) and the periphery of the opening (5) of the tank (3).

Further, the liquid collecting gutter (12) stopped in this way.
This inclined state is maintained even if the opening / closing lid (6) is raised thereafter, and the weight ball rail (16) described with reference to FIG. 4 is provided as a holding means for this purpose. Have been. That is, in the weight ball rail (16), the weight ball (20) can freely roll, and the liquid collecting gutter (12) tilts to the lower right as shown in FIG. 4, for example. For example, the weight ball (20) rolls to the right end to maintain the inclined state of the gutter (12). Therefore, even if the lid (6) edge (19) rises, and then the gutter (1)
Even if a slight force is applied to the upper end portion (13) of (2), the inclined state is maintained as it is.

The tilt holding means is not limited to the weight ball (20). For example, magnets are attached to the lower ends of both ends of the bottom plate (14), and the liquid collecting gutter (12) is tilted to one side. At this time, it is also possible to adopt a configuration in which it is magnetically attached to the upper surface of the heat insulating portion (11) to maintain the inclination.

The configuration of the liquid tank type thermal shock test apparatus of the present invention has been described above. Next, the operation of the apparatus will be described with reference to FIGS. First, in FIG. 1, the sample basket (4) is immersed in a high-temperature heat medium and a test for a low temperature is performed, and the liquid collection gutter (12) is connected to the high-temperature tank (2) as described above. It is inclined to the side. As shown in FIG. 2, the inclined state of the liquid collecting gutter (12) is such that the opening / closing lid (6) and the sample basket (4) are lifted from the high-temperature tank (3) via the transfer device (8). During the movement of the upper portion of the casing (1) toward the low-temperature tank (2), the operation is continued by the action of the weight ball (20) and the like.

Therefore, in FIG. 2, all the high-temperature heat transfer fluid that has dripped from the sample basket (4) and adhered in the high-temperature tank (3) is received by the liquid recovery gutter (12), and the liquid recovery gutter (12). Flows into the high-temperature tank (3) along the inclination of the tank and is collected. Next, the sample basket (4) and the opening / closing lid (6) coming to the upper part of the low-temperature tank (2) are attached to the low-temperature tank (2).
Descend toward. At this time, the edge (19) of the opening / closing lid (6) is connected to the upper end (13) of the liquid collecting gutter (12).
Then, the liquid recovery gutter (12) is tilted toward the low temperature tank (2) in the opposite direction to the state shown in FIG.

For this reason, after the test of the sample shown in FIG. 3 using the high-temperature heat transfer medium is completed, when the opening / closing lid (6) and the sample basket (4) are raised and transferred to the high-temperature tank (3), The low-temperature heat transfer medium that drips from the sample basket (4) or the like flows down through the liquid recovery gutter (12) toward the low-temperature tank (2) and is collected in the low-temperature tank (2). Thereafter, the above is repeated, so that each heat medium liquid dripping from the sample basket (4) or the like is always in each of the predetermined tanks (2) and (3) without soiling the upper surface of the heat insulating portion (11). Will be collected.

[0020]

As described above, according to the present invention, a low-temperature tank and a high-temperature tank, each storing a heat medium liquid, are arranged at a required interval in the lower portion of the casing, and the sample basket hanging from the opening / closing lid is placed in the casing. For a low-temperature tank and a high-temperature tank, while alternately immersing, in a liquid tank type thermal shock test apparatus in which an opening / closing lid is covered at an upper opening of each tank, a liquid recovery gutter is provided on the upper surface of the intermediate heat insulating portion of both tanks. Both ends have a size substantially reaching the inner ends of the upper ends of the two tanks, and are arranged so as to be capable of alternately tilting by pressing the lid edge by lowering the open / close lid while supporting the middle part. Therefore, all of the heat transfer medium dripping from the sample basket or the like transferred from one tank to the other tank can be collected in each tank by the liquid collection gutter. For this reason, the heat medium liquids for the low temperature and the high temperature are not mixed with each other and the heat medium liquid does not deteriorate, and the thermal shock test can be continued without any inconvenience.

Further, all the heat medium liquid that drips as described above is received by the liquid collecting gutter and collected, so that the inside of the casing,
In particular, contamination of the heat insulating portion between the tanks is also prevented. It is also an advantage of the present invention that such recovery of the heat transfer fluid is made possible with a very simple device.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view of a liquid tank type thermal shock test apparatus of the present invention.

FIG. 2 is an operation explanatory view of the liquid tank type thermal shock test apparatus of the present invention.

FIG. 3 is an explanatory view of the operation of the liquid tank type thermal shock test apparatus of the present invention.

FIG. 4 is a perspective view of a liquid collecting gutter of the liquid tank type thermal shock test apparatus of the present invention.

[Description of Signs] (1) Casing (2) Low-temperature tank (3) High-temperature tank (4) Sample basket (5) Opening (6) Opening / closing lid (11) Insulating part (12) Liquid recovery gutter (13) End (19) Lid edge

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-203243 (JP, A) JP-A-2-27234 (JP, A) JP-A-3-235036 (JP, A) 183964 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01N 3/00-3/62 G01N 17/00

Claims (1)

(57) [Claims] A low-temperature tank (2) and a high-temperature tank (3), each storing a heat medium liquid, are arranged at a required interval in a lower portion of a casing (1), and a sample suspended from an opening / closing lid (6). The basket (4) is reciprocated between the two tanks (2) and (3),
The container is alternately immersed in the low-temperature tank (2) and the high-temperature tank (3), and the opening / closing lid (6) on the upper part of the sample basket (4) is opened (5) in each of the tanks (2) and (3). , (5), a liquid tank type thermal shock test apparatus,
(3) Liquid recovery gutter (12) on the upper surface of the intermediate heat insulating part (11)
At both ends (13), (13) are both tanks (2),
The upper end openings (5) and (5) of (3) have a size substantially reaching the inner end and support the intermediate portion, and are pressed by the lid edge (19) due to the lowering of the opening / closing lid (6). A liquid tank type thermal shock test apparatus, which is arranged so as to be tiltable alternately.