JP2657506B2 - Bath liquid recovery equipment for liquid tank type thermal shock test equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid tank type impact test apparatus for testing durability, strength, and the like of components such as small precision equipment or electronic components due to thermal shock.

[Prior art]

For components such as precision equipment and electronic components, a thermal shock test is performed to confirm the durability against thermal effects in addition to the general test. Is alternately transferred and immersed in a liquid tank that presents a liquid in a low temperature state and a high temperature liquid tank. However, in the conventional method, the temperature cannot be lowered by the chemical used in the low-temperature liquid, so that the durability in the low-temperature region and the temperature difference between the high temperature and the low temperature can be increased. It was difficult, and the test range was narrowed, which was a problem. Therefore, a fluorine-based inert liquid is known as a bath liquid capable of obtaining a large temperature difference, and if this is used, a thermal shock test is also effective. However, since this kind of bath liquid is very expensive, it is immersed. During the removal, it is gradually consumed due to being attached to the sample and being taken out of the bathtub, or being evaporated and dissipated by heating, and the running cost is significantly increased. Not. Therefore, there has been a demand for a device which has been completed as a general-purpose device capable of performing an advanced thermal shock test. Therefore, the present applicant has disclosed Japanese Patent Application Laid-Open No.
-263836 proposes a liquid tank type thermal shock test device. That is, as shown in FIGS. 3 and 4, the inside of the main body 101 formed in a box-shaped body of required dimensions is separated from the rear half by a partition wall 103 so that the front half becomes the test chamber 102. The upper half of the test chamber 102 is a space for moving test samples and a room temperature test, and the lower half is provided with a low-temperature bath 104 and a high-temperature bath 105 at a required interval. Thus, both the low-temperature bath 104 and the high-temperature bath 105 are formed as vertically long baths (preferably as deep as possible).
At the upper part, sample basket entrances 104 ′ and 105 ′ are respectively limited and open upward, and an opening / closing lid 106, which can be automatically opened and closed by a linear drive (fluid pressure cylinder, electric cylinder, etc.) for each entrance / exit, 106 is provided so that the inside of the tank can be kept airtight when the lid is closed. A cooler 107 for keeping the bath liquid W at a low temperature in a state where the bath liquid W is always immersed in a predetermined liquid is provided in the lower part of the low-temperature bathtub 104.
Is formed in a tubular shape in which a sample basket 140 can be received, and a heat tube 108 for heating the bath solution W with a heated gas is provided below the cooler 107. In addition, a heater 109 for raising the ambient temperature through a heated gas is formed in a tubular shape immediately below the entrance 104 '. As the bath liquid W to be put into the low-temperature bath 104 as described above, a fluorine-based inert liquid (for example, “Fluorinert FC-77”)
(For low temperature) to the required liquid depth. A high-temperature bathtub 105 provided at a required interval from the low-temperature bathtub 104 has an electric heater 111 for heating the bath liquid W ′ at a lower portion thereof, and a high-temperature bathtub at an upper part of the heater 111 so as to be immersed in the bath liquid. Cooler 112 (used when rapid cooling is required)
A condenser 113 is provided immediately below the entrance 105 '.
Are formed and arranged in a cylindrical shape. A high-temperature fluorinated inert liquid (for example, "Fluorinert FC-43" (trade name, manufactured by Sumitomo 3M Limited)) is used as a bath liquid in the high-temperature bath 105 until the required liquid depth is reached. The lower temperature fishing tubs 104 and 105 are provided with a bat 115 at the upper portion and the upper surfaces of the bats 115 are connected to each other. The surface of the bat 115 is formed with a downward slope toward the high temperature tub 105, as shown in FIG. The upper surface of the vat 115 and the hot tub 105 are provided with a liquid inlet 116 at a position other than the entrance 105 ′ (at a position just before the flow gradient), and a liquid droplet provided directly below the condenser 113 in the upper part of the hot tub 105. The separator 120 is guided from the tray 117 to the separator 120 by a conduit 118, and the separator 120 is a closed vessel of an appropriate size, and a heater 122 is disposed at an inner bottom thereof. Arrange so that it is flush with the liquid level, and from the bottom, Yes Connect Te, outlet tube 121 provided in the top of the separator 120 is connected to the heat exchanger 124, the jacket 124 of the heat exchanger 124 '
Has a lower boiling point than the high-temperature bath liquid "Fluorinert FC-43" because its boiling point is lower than that of the high-temperature bath liquid "Fluorinert FC-77". 174 ° C.) which is evaporated and separated first) is condensed and liquefied, and connected to level pots 126 and 126 ′ via conduits 123 ′ and 127, respectively, so that a constant liquid temperature is maintained. Each of the level pots 126 and 126 'can be replenished in a reduced amount from a supply tank for each bath solution provided at the upper rear part of the test chamber. The bathtubs 104 and 105 are additionally provided with stirrers, respectively, so as to promote uniformity of the liquid temperature during the work and to work at a stable temperature. The supply of the refrigerant to the coolers and condensers in each of the bathtubs 104 and 105 is connected to a refrigerator installed in a rear chamber (not shown) of the main body 101 and operates to supply a heated gas. Heat gas is supplied to the heaters 108 and 109 from a heated gas supply source. The bath liquid that evaporates and rises in accordance with the immersion heat treatment and liquid drainage of the sample in the bathtub 105 comes into contact with the condenser 113 provided adjacent to the entrance 105 ′, where the evaporation mist is collected and condensed, forming a droplet. The waste is dropped and collected on a tray 117 located immediately below, and is separated by a conduit 118 into a separator 120 of a liquid recovery means.
The separator 120 stores an appropriate amount of a high-temperature bath liquid having the same level corresponding to the reference liquid level when the liquid is put into the tank 105 during operation, and is disposed in the liquid. The liquid introduced by heating (approximately 100 ° C.) by the electric heater 122 is also heated, so that the low-boiling low-temperature bath liquid mixed therein evaporates and is sent from the introduction pipe 121 to the heat exchanger 124 where it is sent. After being cooled and liquefied, the liquid is returned to the low-temperature bath 4 and both baths are recovered through the separator 120. The recovered amount of the high-temperature bath is returned to the high-temperature bath 105 through the connecting pipe 123. Will be. In the above-described conventional configuration, a considerable effect can be obtained in the recovery of the bath liquid, but it has been desired to recover the bath liquid more efficiently in this kind of technical field.

[Problems to be solved by the invention]

The present invention has been made in view of such circumstances,
A highly reliable bath liquid recovery system for the liquid tank type thermal shock test system that reduces the running cost by efficiently recovering the bath liquid that can perform advanced thermal shock tests by taking a large temperature difference although it is expensive To offer.

[Means for solving the problems]

In order to solve the above problems, in the present invention, a low-temperature tub having a cooler for cooling a bath liquid to a low temperature, a high-temperature tub having a heater for heating the bath liquid to a high temperature, and A carrier for moving the upper test chamber to alternately immerse the sample in the low-temperature bath and the high-temperature bath, and separating the bath liquid condensed by a condenser provided above the high-temperature bath and separating the sample into a low-temperature bath. In a bath liquid recovery device of a liquid bath type thermal shock test device for returning to a bath tub and a high temperature bath tub, (a). Opening a first inlet to the test chamber; (b). Opening a second intake port above the high temperature bath, (c). A collection device for liquefying the inhaled matter and discharging the liquefied air from the discharge port to the first and second suction ports; (d). (A) providing a suction / exhaust device having an intake port connected to the collection device; (F) a switching valve communicating with an exhaust port of the intake / exhaust device and leading the gas exhausted from the exhaust port to an external exhaust port for exhausting the gas to the outside of the main body and a ventilation port circulating in the test chamber; . (B) providing an outlet for discharging the bath liquid condensed by the condenser below the second inlet of the high-temperature bath; The outlet and the outlet of the recovery device communicate with each other,
Providing a separator with a built-in filter for filtering components such as water, acid or alkali from the bath solution; (h). A technical measure is taken to separate the bath liquid after filtration of the separator into a high-temperature bath liquid and a low-temperature bath liquid, and to provide a separation device for returning each separated bath liquid to the low-temperature bath and the high-temperature bath, respectively. ing.

[Action]

The operation of the bath liquid recovery device of this liquid tank type thermal shock test device will be described with reference to the block diagram of FIG. The air containing the mist-like bath liquid and the like in the test chamber and the high-temperature bath is sucked into the recovery device from the first and second suction ports by the suction force of the suction and exhaust device. The gas separated into gas and liquid in the recovery device is exhausted to the outside of the device or the test chamber through the switching valve by the exhaust force of the intake and exhaust device. As a result, gas containing corrosive gas and the like is exhausted to the outside of the apparatus, and gas not contained is exhausted into the test room to ventilate the test room. In addition, the liquid that has been gas-liquid separated in the recovery device is dropped by a condenser in a high-temperature bath, and is injected into the separator together with the liquid discharged from the outlet. In the separator, acids, alkalis, water, etc. are separated and discharged from the separator by a filter, and the bath solution is sent to a separator. In the separation device, the bath liquid is separated into a high-temperature bath liquid and a low-temperature bath liquid, and the separated bath liquids are returned to the low-temperature bath and the high-temperature bath, respectively.

【Example】

Hereinafter, a preferred embodiment of the bath liquid recovery apparatus of the liquid tank type thermal shock test apparatus according to the present invention will be described with reference to FIG. The liquid tank type thermal shock test apparatus has the same basic configuration as the conventional configuration. That is, a test chamber 2 having a closed structure in which a sample access door is provided on a front surface is formed in a main body of a box-shaped frame, and a sample basket which is formed vertically in the test chamber 2 and has an automatic opening / closing lid on an upper surface. A low-temperature tub 4 and a high-temperature tub 5 having forty entrances and exits may be arranged at required intervals, and a cooler 7 may be arranged in the low-temperature tub 4 or a heater (not shown) may be arranged therewith. A heater 11 is provided in the lower part of the bathtub, and a condenser 13 is provided immediately below the entrance and exit. The baths 4 and 5 contain fluorine-based inert liquids corresponding to the respective bath temperatures. If the temperature of the solution in the low-temperature bath 4 is to be used at a temperature higher than the minimum temperature in the temperature setting at the time of the work, a heat tube may be provided in the bath solution, and the heating gas is fed by heating. Then, the required liquid temperature can be adjusted. Alternatively, a heater can be provided for heating. Further, the sample basket 40 is provided with a traversable carrier 30 which can be stopped at a predetermined position (in the embodiment, a position immediately above both tanks and an intermediate position) in the upper part of the test chamber 2, and the carrier is not shown in the drawing. An elevating mechanism for the process of closing the carry-in / out door with the temporary lid when inserted in the bathtub, and an elevating cylinder for elevating / lowering in the bath,
It is possible to adopt an appropriate configuration such as attaching a liquid shake-off cylinder or the like at an upper position in the tank. Then, with respect to the thermal shock test in which the sample is immersed from the low-temperature bath 4 to the high-temperature bath 5, the operations are sequentially performed in a predetermined order by a program in a controller (not shown) which electrically combines the operations. It moves according to a set time, and can be automatically operated by an automatic control mechanism in which each mechanism operates without any trouble. As a thermal shock test of this sample, in addition to a test in two zones of low temperature and high temperature, a test of three zones of low temperature-normal temperature-high temperature can also be performed. The operation may be performed such that the test piece is allowed to stand still in the test chamber 2 for a predetermined time at an intermediate position up to and then transferred to the high-temperature bath 5 and immersed. The bath liquid recovery apparatus 1 of the present invention is provided in such a liquid tank type thermal shock test apparatus. That is, the first intake port 1A is provided in the middle of the side wall of the test chamber 2.
And an exhaust port 1D is provided above it. The high-temperature bath 5 below the test chamber 2 is composed of upper and lower two-stage tanks. The upper stage is expanded and the condenser 13 is disposed in an annular shape. It comprises a bathtub body in which a heater 11 is provided. A second intake port 1B is opened in a middle part of the side wall at the upper position where the condenser 13 is provided, and a saucer 17 formed in an annular shape on the step at the hanging position of the condenser 13 is disposed. An outlet 1C communicating with the tray is opened in the side wall. Further, a high-temperature bath liquid inlet 5A is opened on a side wall of the lower tub body of the high-temperature bath 5 and a low-temperature bath liquid inlet 4A is opened on a side wall of the low-temperature bath 4 respectively. The first intake port 1A and the second intake port 1B are respectively connected to a recovery device 21 having a built-in coiled condenser via pipes. The recovery device 21 is connected to a suction / exhaust device 22 composed of a motor-driven blower, and recovers vapor in the test chamber and the high-temperature bath from the first and second intake ports 1A and 1B by the suction force. Suck into 21. The sucked vapor is separated into gas and liquid in the recovery device 21. The gas separated into gas and liquid in the recovery device 21 is
With the exhaust force of 22 to the outside of the device through the switching valve 23 or the exhaust port
It flows into the test room 2 from 1D. The switching valve 23 is an electromagnetic valve in this embodiment,
During the thermal shock test, gas is discharged into the test chamber 2 by a control signal from a controller (not shown), and switching control is performed so that the gas is discharged to the outside for a certain time after the test is completed. As a result, gas containing corrosive gas and the like is discharged to the outside of the apparatus through an exhaust duct or the like, and gas not contained is discharged into the test chamber 2 to ventilate the test chamber 2. Next, the liquid gas-liquid separated in the recovery device 21 is dropped by the condenser 13 of the high-temperature bath 5 and is separated from the tray 17 to the outlet 1C together with the liquid discharged to the outlet 1C through the pipes. Is injected into. In the separator 24, a bath liquid component and water in which other acids, alkalis and the like and HP are dissolved are separated by filtration by a built-in filter 24 ', and the water is drained through a drain port 24A. On the other hand, the separated bath liquid components are then sent to separation devices 25 and 26. The first separator 25 is a closed vessel of an appropriate size and is provided with a heater at the inner bottom, and a second separator 26 provided with a cooler via an outlet pipe provided at the top of the first separator 25. Connected to As a result, the low-temperature bath liquid that has been evaporated and separated has a lower boiling point than the high-temperature bath liquid, so that it evaporates and separates first, so that it can be condensed and liquefied using this, and the high-temperature bath liquid can be used. Separate from the low-temperature solution at the same time, and return the separated bath liquids from the low-temperature bath liquid inlet 4A into the low-temperature bath 4 and the high-temperature bath liquid inlet 5A into the high-temperature bath 5 via pipes. Can be. In this example, the depth of the high-temperature bathtub and the low-temperature bathtub was set deep, and a space was provided between the liquid level of each bathtub and the shutter at the entrance and exit of the bath, so that the mist-like bath solution was introduced into the test chamber. This is preferable because it hardly flows out and the consumption of the bath liquid can be further reduced. Further, the carrier for moving the sample and the space for moving the sample are separated, and the volume of the bath liquid adhering to the space wall can be further reduced by minimizing the volume in the moving space (test room). .

【The invention's effect】

Since the suction port was provided in the upper space of the high-temperature bath tub having a large amount of mist-like bath liquid during the test, the mist-like bath liquid can be effectively collected. In addition, decay gas, acid, alkali, moisture in the air, etc. brought in by the sample in addition to the mist-like bath liquid during the test, gasified ones are exhausted to the outside through the switching valve,
The liquefied matter can be filtered off with a separator and drained, so that rot can be prevented. In addition to recovering only the liquid droplets in the condenser as in the prior art, the present invention can also recover and reuse the bath liquid from the vapor in the test chamber and the high-temperature bath, further improving the recovery efficiency. It is preferable because it can be increased.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the operation of a bath liquid recovery apparatus of a liquid tank type thermal shock test apparatus according to the present invention, FIG. 2 is a schematic view showing a preferred embodiment of the present invention, and FIG. FIG. 4 is a schematic view showing the recovery of the bath liquid. 1A ... First intake port 1B ... Second intake 1C ... Outlet 1D ... Exhaust port 21 ... Recovery device 22 ... Suction and exhaust device 23 ... Switching valve 24 ... Separator 25 ... First separator 26 …… Second separator

Claims (1)

(57) [Claims] 1. A low-temperature tub provided in a main body and having a cooler for cooling a bath liquid to a low temperature, a high-temperature bath tub having a heater for heating the bath liquid to a high temperature, and a test chamber above the high-temperature bath tub. A carrier for alternately immersing the sample in the low-temperature bath and the high-temperature bath; a liquid separated from the bath liquid condensed by a condenser provided above the high-temperature bath and returned to the low-temperature bath and the high-temperature bath; In a bath liquid recovery device of a bath type thermal shock test device, a first suction port opened to a test chamber, a second suction port opened above a high temperature bath, and communication with the first and second suction ports and suction. A collecting device for liquefying and discharging the material from the discharge port, an air intake / exhaust device having an air intake port connected to the recovery device, and a gas discharged from the exhaust port communicating with the exhaust port of the air suction / exhaust device to the outside of the main body. External exhaust port for exhaust and exchange circulating in the test chamber A switching valve that is switchably connected to the outlet, a discharge port that discharges the bath liquid condensed by the condenser below the second intake port of the high-temperature bath, and the discharge port communicates with the discharge port of the recovery device. And a separator having a built-in filter for filtering components such as water, acid or alkali from the bath solution, and separating the separated bath solution into a high-temperature bath solution and a low-temperature bath solution. A separating device for returning each of the bath liquids to a low-temperature bath and a high-temperature bath, respectively.