JPH0371062B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field: The present invention relates to a liquid liquid thermal shock testing device for testing the durability, strength, etc. of parts of small precision instruments, electronic parts, etc. by thermal shock. It is.

Conventional technology: In addition to general tests, parts of precision equipment and electronic parts are subjected to thermal shock tests to confirm their durability against thermal effects. , a method is adopted in which the target sample is immersed in a liquid bath at a low temperature and a liquid bath at a high temperature alternately.

However, with conventional methods, the temperature cannot be lowered using the chemical agents used in low-temperature liquids, so it is difficult to maintain durability in low-temperature ranges and to maintain a large temperature difference between high and low temperatures. This was difficult and of course narrowed the scope of the test, which was a problem.

Therefore, a fluorine-based inert liquid is known as a bath liquid that can maintain a large temperature difference, and if this is used, thermal shock tests are also effective, but this type of bath liquid is very expensive. During immersion and removal, it adheres to the sample and takes it out of the bath, or it evaporates and dissipates due to heating, which causes it to gradually wear out, resulting in extremely high running costs, so it is not suitable for general use. It has not yet reached the point where it will be done. Therefore, there is a need for a complete device that is versatile and capable of performing advanced thermal shock tests.

Problems to be Solved by the Invention: This invention has been devised in view of the above-mentioned circumstances. The bath liquid is guided to the bathtub side and collected from the inlet to the droplet receiver, and the bath liquid that cannot be collected from the inlet to the droplet receiver is temporarily mixed with the high-temperature bath liquid stored in the high-temperature bathtub. An object of the present invention is to provide a liquid bath type thermal shock device in which the liquid is condensed on contact with a condenser through evaporation by heating, the resulting liquid droplets are collected in the liquid droplet receiver, and the liquid is returned to the original bath liquid by a liquid recovery means. .

Means for Solving the Problems: In order to solve the above problems, the present invention has an entrance/exit at the bottom of the test chamber divided into sections inside the box-shaped body, each having an opening/closing lid on the image plane, and a high-temperature A high-temperature bathtub containing a hot bath liquid and a low-temperature bathtub containing a low-temperature bath liquid whose boiling point is lower than that of the high-temperature bath liquid are placed side by side at required intervals, and the low-temperature bathtub and high-temperature bathtub are placed in the upper part of the test chamber. In a liquid bath type thermal shock test apparatus, a carrier is provided that can move between the baths, and a sample basket is held on the carrier so that it can be raised and lowered, so that the samples can be immersed or pulled up into the bath liquid in each bath. a) The upper surface that connects the entrance and exit of the low-temperature bathtub and the entrance and exit of the high-temperature bathtub is set as a slope that gradually descends from the low-temperature bathtub side to the high-temperature bathtub side, and the slope reaches the entrance and exit of the high-temperature bathtub. (b) A condenser is disposed in the high temperature bath near the entrance and exit, and At the bottom, droplets condensed by the condenser and bath liquid flowing in from the inlet are received and transferred to liquid recovery means provided outside the high temperature bath. (c) The liquid recovery means separates the mixed liquid of the low-temperature bath liquid and the high-temperature bath liquid introduced through the droplet receiver, and separates the liquid into the low-temperature bathtub and the high-temperature bathtub. A technical measure is taken to circulate the water back into each identical bath liquid.

Use: The low-temperature bath liquid or high-temperature bath liquid that adheres to the sample and is taken out of the bathtub falls from the sample basket that is transferred between the low-temperature bathtub and the high-temperature bathtub, and is guided along the slope of the high-temperature bathtub. , all or part of which falls from the inlet and is collected in the droplet receiver.

Moreover, the bath liquid and the like that do not fall from the inlet are mixed with the high temperature bath liquid stored in the high temperature bathtub.

On the other hand, the bath liquid that evaporates and rises due to heating in the high-temperature bathtub is condensed in a condenser, and the droplets are collected in the droplet receiver.

The mixture of low-temperature bath liquid and high-temperature bath liquid collected in this way is separated into the mixed liquid of low-temperature bath liquid and high-temperature bath liquid by a liquid recovery means, and the same liquid is collected in each of the low-temperature bath and high-temperature bath. Return to bath solution and circulate.

Embodiment: Next, an embodiment of the apparatus of the present invention will be described in detail with reference to the drawings. In FIGS. 1 to 3, the inside of the main body 1 formed into a box-shaped frame having the required dimensions is such that the front half thereof is a test chamber 2. The test chamber 2 is separated from the rear half by a partition wall 3, and the upper half of the test chamber 2 is used as a space for moving test samples and room temperature testing, and the lower half has a low-temperature bath 4 and a high-temperature bath 5. The distance between the two is arranged.

Both the low-temperature bath 4 and the high-temperature bath 5 are formed into vertically elongated vessels (preferably as deep as possible), and each has a sample basket entrance/exit 4', 5' at the top.
An opening/closing lid 6, which has a limited opening upward and can be opened and closed automatically by a linear drive machine (hydraulic cylinder, electric cylinder, etc.) for each entrance/exit.
6' is installed in such a way that it can keep the inside of the tank airtight when the lid is closed. In the lower part of the low-temperature bath 4, there is a cooler 7 for keeping the bath liquid W at a low temperature while it is constantly immersed in a predetermined liquid depth, and a sample basket 40 (described later) is installed inside.
A heat tube 8 for heating the bath liquid W with heated gas is attached to the lower side of the cooler 7, and an inlet/outlet 4' A cylindrical heater 9 for raising the ambient temperature by passing heated gas is disposed directly below and around the cylindrical heater 9 . As the bath liquid W to be placed in the low-temperature bathtub 4, a fluorine-based inert liquid (for example, "Florinat FC-77" (trade name, manufactured by Sumitomo 3M Limited) for low temperature use) is used at a required depth.

The high-temperature bathtub 5, which is disposed at a required distance from the low-temperature bathtub 4, has an electric heater 11 for heating the bath liquid W' at the lower part thereof, and a strong position of the heater 11 that is immersed in the bath liquid. A cooler 12 (used when rapid cooling is required) is provided, and a cylindrical condenser 13 is provided immediately below and around the inlet/outlet 5'. The high-temperature bathtub 5 is filled with a high-temperature fluorine-based inert liquid (for example, "Florinat FC-43" (trade name, manufactured by Sumitomo 3M)) as a bath liquid.
Pour the liquid to the required depth and use.

The upper surfaces of both the high temperature and low temperature baths 4 and 5 are connected to each other by placing a butt 15 at the top, and the surface of the butt 15 is sloped downward toward the high temperature bath 5. As outlined in Figure 3,
The upper surface of the butt 15 and the high-temperature bathtub 5 are located at a portion other than the entrance/exit 5' (in front of the flow gradient) through the liquid inlet small hole 1.
6 is perforated, and the condenser 1 is located in the upper part of the high temperature bathtub 5.
A droplet receiving tray 17 shown as an example of a droplet receiving section attached directly below the container 3 is led to a separator 20 by a conduit 18, and the separator 20 is a closed container of appropriate dimensions with a heater 22 disposed at the inner bottom. This separator 2
The reference liquid level of 0 is arranged so as to be aligned with the liquid level of the high-temperature bathtub 5, and a pipe 23 is connected from the bottom to the bottom of the high-temperature bathtub 5.
An outlet pipe 21 provided at the top of the separator 20 is connected to a heat exchanger 24, and a low-temperature bath liquid that has been evaporated and separated through a refrigerant or cooling water is passed through a jacket 24' of this heat exchanger 24. (The product name ``Florinat FC-77'' has a lower boiling point than the high-temperature bath liquid ``Florinat FC-43'' (the former's boiling point
A liquid recovery means is provided between both baths 4 and 5 to condense and liquefy the boiling point of 97℃ (the latter evaporates and separates first) and returns it to the tank from the upper part of the low temperature bath 4 through a conduit 25. There is. Both the low-temperature bathtub 4 and the high-temperature bathtub 5 are connected to level pots 26 and 26 via pipes 23' and 27, respectively, so that a constant liquid level is maintained. Each level pot 2
6 and 26' are arranged so that the reduced amount can be replenished from a supply tank for each bath solution installed at the rear upper part of the test chamber 2. Additionally, the bathtubs 4 and 5 have an auxiliary agitator 29.
are attached to each to promote uniformity of the liquid temperature during work so that work can be performed at a stable temperature.

The supply of refrigerant to the coolers and condensers in each of the bathtubs 4 and 5 described above is operated by connecting to a refrigerator installed in the rear chamber 10 of the main body 1.
The heaters 8 and 9 that supply heated gas are supplied with hot gas from a heated gas supply source.

The transfer device 30 for carrying out a thermal shock test by immersing the target sample in both the high and low temperature baths 4 and 5 by the required means has its center of movement located in the upper part of the test chamber 2. An elevating mechanism and a lateral movement mechanism (not shown) are incorporated into a support frame 31 provided with a guide rail so as to be located on the same vertical plane passing through the center of the entrance. A transport body 33 is attached that is controlled so as to be able to stop at the 4' position, the entrance/exit 4' position of the cold bathtub 4, and an intermediate position between the two. A movable plate 37 that can be raised and lowered freely by two lifting cylinders 35, 35 and a plurality of guide rods 36 is suspended, and a second lifting cylinder 38 is erected on the upper center surface of the movable plate 37. A sample cage 40 is attached to the end of the piston rod 38' of this second elevating cylinder below the movable platen 37. In addition, a temporary cover 39 with a gasket attached to the lower edge of the movable platen 37 is arranged at the lower side of the movable platen 37 so as to be in contact with the opening edge of the entrance/exit 4' or 5' of each bathtub to maintain airtightness during work. This temporary lid 39 is suspended by a second elevating cylinder piston rod 38' via the mounting portion of the sample basket 40, and is made vertically movable by attaching the lower end of the guide rod 36. Also, movable plate 3
A vibration generating air cylinder 43 is attached to the lower surface of the sample cage 7 so that vibrations are propagated to the sample cage 40.

The lateral movement of the carrier 33 can be performed according to a predetermined program using a linear drive machine (hydraulic cylinder, electric cylinder, rack gear drive type actuator, etc.) or a winding electric mechanism.

Further, a gas exhaust port 51 is provided at the center of the lower part of the partition wall 3 of the test chamber 2, and an exhaust duct 50 with the main body 1 erected upward in the center is connected to the gas exhaust port 51. A condenser 52 is disposed in the middle of the duct 50 to collect mist contained in the exhaust gas, condense the mist, and return the liquid to the high-temperature bathtub 5 from a drain port 53 provided at the lower end of the duct 50. Collection means are provided. A sample inlet/outlet 55 is provided at the center of the front of the test chamber 2, and an opening door 56 with a viewing window is attached thereto. Note that each of the above-mentioned drive units, temperature control, etc. are operated by an electric control mechanism for automatic operation.

According to the apparatus of the present invention configured as described above, when starting a test, each bath is filled with the required bath liquid to a predetermined depth (until the sample basket 40 is completely immersed), and the bath is heated to a low temperature. The bathtub 4 is cooled to a required temperature by circulating refrigerant from a refrigerator in a cooler 7 installed inside the bathtub 4, while the high-temperature bathtub 5, like the low-temperature bathtub 4, is filled with high-temperature bath liquid at a predetermined liquid depth. and heated to a predetermined temperature using the electric heater 11. Before the start of operation, the sample basket 40 is filled with a required amount of a target sample (for example, an electronic component) at the center of the test preparation area between the two tanks (FIG. 4A). In this state, the lids 6 and 6' of the low-temperature bathtub 4 and the high-temperature bathtub 5 are both closed.

When transitioning from this state to test operation, the operating fluid (usually compressed air) is supplied to the second lifting cylinder 38 of the lifting mechanism by operating the electric control mechanism attached to the device according to the program. Then, the sample basket 40 is lifted to the upper limit at the neutral position. At the same time, when it is electrically confirmed that the sample basket 40 is in the test preparation position (center upper limit position), the entrance/exit covers 6', 6 of the high temperature bath 5 and low temperature bath 4 are forced to open/close by their respective opening/closing linear actuators. It is then closed and ready for operation.

Next, when the operation is started based on the preset automatic operation program, the stirrer attached to each tank rotates to stir the bath liquid, and at the same time, the temperature control command signal of each tank turns on the cooler 7 and electric heater. 11
operates and the low-temperature bathtub 4 reaches the pre-cooling temperature,
The lid 6 of the low temperature bath 4 is opened, and then the transfer device 30
The lateral movement mechanism operates to move the carrier 33 into the low temperature bath 4.
When the lifting mechanism starts operating, the piston rod of the lifting cylinder 35 protrudes, causing the temporary lid 3 to move up along with the movable platen 37.
9 and the sample basket 40 are lowered, the temporary lid 39 contacts the entrance/exit 4' to close the tank 4, and at the same time the piston rod 38' of the second lifting cylinder 38 is protruded, so that the sample basket 40 is lowered as shown in FIG. immersed in a cold bath solution as shown in Figure.

After the sample basket 40 has been immersed in the low-temperature bath for the set time, the set timer is activated to first raise it from the bath liquid to above the liquid level, and then the vibration air cylinder 43 is activated. The vertical vibration is propagated to the sample cage 40, and the bath liquid adhering to the cage and the sample is shaken off (see FIG. 5A). When this operation is completed, the lifting cylinders 35, 35 of the lifting mechanism are operated to move the piston rod backward, and the sample basket 40 is pulled up together with the movable platen 37 and the temporary lid 39, and the sample basket 40 is moved into the cold bath 4. taken from. During this time, the entrance/exit cover 6' on the high temperature bathtub 5 side is opened and ready for reception.
The sample basket 40 pulled up into the test chamber 2 is moved above the high temperature bath 5 by the traverse movement of the carrier 33, and is lowered into the open high temperature bath 5 in the same manner as described above, and is immersed in the high temperature bath liquid. immersed. While this operation is being performed, the entrance/exit door 6 on the side of the low-temperature bathtub 4 is closed to prevent temperature changes in the bath liquid.
After the set time has elapsed, the liquid draining operation is performed in the high temperature bath 5 in the same manner as in the low temperature side, and the sample basket 40 is taken out of the bath afterward, moved to the neutral position, and the sample basket 40 is lowered onto the bath 15. This means that one work cycle is completed.

In the process of the above operation, the sample basket 40
While the sample basket 40 is moved between the low-temperature bathtub and the high-temperature bathtub 5 by the carrier 33 until the sample basket 40 returns to the neutral position and the sample is taken out, the bath liquid that has adhered to the sample and the basket is removed. The liquid is dropped onto the vat 15, and the droplets flow along the slope of the vat 15 into the high-temperature bathtub 5 as both bath liquids coexist as described above. The bath liquid that evaporates and rises as the sample is immersed and heated in the bath 5 and drained is
The evaporated mist is collected and condensed when it comes into contact with the condenser 13 installed adjacent to the entrance/exit 5', and the liquid droplets fall onto the tray 17 located directly below and are collected, and the liquid is recovered through the conduit 18. A separator 20 of the means, which separates the liquid from tank 5 during operation.
An appropriate amount of high-temperature bath liquid at the same level as the reference liquid level when placed in the bath is stored, and heated by an electric heater 22 placed in the liquid (heated to approximately 100°C in the example). Since the liquid introduced in is also heated, the mixed low-boiling-point low-temperature bath liquid evaporates, is sent from the outlet pipe 21 to the heat exchanger 24, where it is cooled, and after being liquefied, it is returned to the low-temperature bath 4. Both bath liquids are recovered via the separator 20, and the recovered high temperature bath liquid is returned to the high temperature bath 5 side through the connecting pipe 23.

In addition, when setting the temperature during work, if you want to use the bath liquid in the low-temperature bathtub 4 at a temperature higher than the lowest temperature, heated gas is sent into the heat tube 8 placed in the bath liquid to heat it. Adjust the liquid temperature to the required temperature.

In addition, as a thermal shock test for the sample, in addition to testing in two zones (low temperature - high temperature), it is also possible to perform a test in three zones (low temperature - room temperature - high temperature). The sample is left standing in the test chamber 2 for a predetermined time at an intermediate position reaching 5, and then transferred to the high temperature bath 5 and operated so as to be immersed therein.

Effects of the Invention: In this way, in the present invention, the low temperature bath liquid and high temperature bath liquid attached to the sample etc. and taken out from the low temperature bath or high temperature bath are guided to the high temperature bath side and passed through the inlet. The droplets can be collected from the droplets into the droplet receiver.

In addition, the low-temperature bath liquid and high-temperature bath liquid that could not be collected from the inlet to the droplet receiver are temporarily mixed with the high-temperature bath liquid stored in the high-temperature bath, and then evaporated by heating. The liquid is raised and condensed in contact with the condenser, and falls as droplets to be collected in the droplet receiver.

In this way, all of the low temperature bath liquid and high temperature bath liquid taken out can be collected in the droplet receiver,
The mixed liquid of the low-temperature bath liquid and the high-temperature bath liquid can be transferred to the liquid recovery means and separated, and returned to the same bath liquid in the low-temperature bathtub and the high-temperature bathtub for circulation.

[Brief explanation of drawings]

The drawings show one embodiment of the device of the present invention, in which Fig. 1 is a longitudinal sectional front view of the main part, Fig. 2 is a right side view of Fig. 1 with the main part cut away, and Fig. 3 is a bath liquid recovery A schematic diagram showing the means, and FIGS. 4 to 6 are diagrams showing the operation mode. 1... Main body, 2... Test room, 3... Partition wall, 4
...Low temperature bathtub, 4', 5'...Tank entrance/exit, 5...High temperature bathtub, 6,6'...Open/close lid, 7,12...Cooler, 8...Heat tube, 11,22...Electricity Heater, 13, 52...Condenser, 15...Butt, 16...Inflow small hole, 17...Droplet receiver, 1
8, 25...Conduit, 20...Separator, 21...Outlet pipe, 23, 23', 27...Piping, 24...Cooler, 30...Transport device, 31...Support frame, 3
2... Guide rail, 33... Transport body, 35...
Lifting cylinder, 37...Movable plate, 38...Second lifting cylinder, 38'...Piston rod, 39...Temporary lid, 40...Sample basket, 50...Exhaust duct, 5
1...Exhaust port, 55...Sample inlet/outlet port, 56...
...Opening/closing door, W...Bath liquid for low temperature, W'...Bath liquid for high temperature.

Claims (1)

[Scope of Claims] 1. A high-temperature bathtub containing a high-temperature bath liquid, each having an opening/closing lid on the upper surface and an entrance/exit in the lower part of a test chamber partitioned inside a box-shaped body, and the high-temperature bath liquid. A low-temperature bath containing a low-temperature bath liquid with a lower boiling point is placed side by side at a required interval, and a carrier that can move between the low-temperature bath and the high-temperature bath is installed in the upper part of the test chamber. In a liquid bath type thermal shock testing device in which a sample basket is held movably up and down so that samples can be immersed in and pulled up from the bath liquid in each bath, the upper surface that connects the entrance and exit of the low-temperature bath and the entrance and exit of the high-temperature bath is is set on a slope that gradually descends from the low-temperature bathtub side to the high-temperature bathtub side, and
Before the slope reaches the entrance/exit of the high-temperature bathtub, an inlet is provided to allow all or part of the bath liquid that has flowed down while being guided by the slope to fall into the bath, and a condenser is installed in the high-temperature bath near the entrance/exit. is arranged, and a droplet receiver is provided below the droplet receiver for receiving the droplets condensed in the condenser and the bath liquid flowing in from the inlet, and transferring them to a liquid recovery means provided outside the high temperature bathtub. The liquid recovery means separates the mixed liquid of the low-temperature bath liquid and the high-temperature bath liquid introduced through the droplet receiver and returns them to the same bath liquid in the low-temperature bath and the high-temperature bath. A liquid bath type thermal shock test device characterized by circulation. 2. Claim 1, wherein the high-temperature bath liquid and the low-temperature bath liquid are composed of a fluorine-based inert liquid.
The liquid bath type thermal shock test device described in 2. 3. The liquid recovery means consists of a separator that separates the bath liquid introduced from the droplet receiver into gas and liquid, a conduit that returns the vaporized liquid to the low-temperature bath through a cooler, and a pipe that returns the vaporized liquid to the high-temperature bath from the separator. A liquid bath type thermal shock testing apparatus according to claim 1, characterized in that: