JP3045423B2 - 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, and more particularly to an improvement in means for separating water from a low temperature heat transfer medium.

[0002]

2. Description of the Related Art Conventionally, to remove water from a low-temperature heat medium liquid in a liquid tank type thermal shock test apparatus, the low-temperature heat medium liquid is circulated between the low-temperature heat medium liquid tank and the water separator by a pump. It is done by doing.

[0003] As shown in FIG.
And a filter unit B. The low-temperature heat medium is supplied from the supply port C to the inside of the tank, and only the low-temperature heat medium is returned to the low-temperature test tank through the filter unit B and the drain pipe D. When the reflux is completed, the water remaining in the tank is collected by the drain pipe E, and the air in the filter unit is released to the tank by the pipe F.

[0004]

In such a water separator, the low-temperature heat medium liquid has a higher specific gravity than water, and the water surface G of the water contained in the low-temperature heat medium liquid is equal to the liquid surface of the low-temperature heat medium liquid. H
Is higher, the low-temperature heat medium liquid flows back to the low-temperature test tank, and as the liquid level H of the low-temperature heat medium drops, the water surface G also drops, and the separated water is removed from the filter K inside the filter unit B. And comes into the interior of the filter. The intrusion of moisture into the filter progresses each time water is removed from the low-temperature heat medium liquid, and eventually the filter is clogged, the low-temperature heat medium liquid cannot pass through the filter, and the filter must be cleaned or replaced. I need.

SUMMARY OF THE INVENTION An object of the present invention is to provide a liquid tank type thermal shock test apparatus having an improved water separator which can always smoothly pass a low-temperature heat medium liquid through a filter.

[0006]

In order to achieve the above object, in a liquid tank type thermal shock test apparatus according to the present invention, a water separator is provided such that a drain of a low-temperature heat medium liquid is provided above a filter, and a low-temperature heat It is characterized in that the drains of the water separated from the medium liquid are arranged above the drains of the low-temperature heat medium liquid.

[0007]

In the water separator, the water separated from the low-temperature heat medium liquid has a lower specific gravity than the low-temperature heat medium liquid. In this water separator, when moisture is removed from the low-temperature heat medium liquid, if the low-temperature heat medium liquid is discharged from the low-temperature test tank into the tank, only the low-temperature heat medium liquid passes through the filter in the filter unit, and the low-temperature heat medium is removed. Returning to the tank, the water contained in the heat transfer medium remains inside the tank. As the low-temperature heat medium liquid is discharged, the liquid surface of the low-temperature heat medium liquid and the water level of the separated water in the tank gradually decrease. Since the liquid port is located at the top of the filter, the liquid level of the low-temperature heat medium liquid does not always fall from the top of the filter, the separated moisture does not contact the filter, and the water separated by the filter from the low-temperature heat medium liquid Not only does it not cause clogging, but also drainage of separated water can be reliably performed because the drainage port is located above the drainage port of the low-temperature heat medium liquid.

In the apparatus of the present invention, by providing a float above the filter, when clogging occurs in the filter, the liquid level in the tank does not change and the float does not displace. The clogging state of the filter can be detected from the change. For example, a change in the state of the float can be extracted as an electric signal, and a warning of clogging or a stop of work can be performed.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the liquid tank type thermal shock test apparatus of the present invention is as follows.
This will be described below with reference to FIGS.

As shown in FIG. 1, the liquid test tank type thermal shock test apparatus includes a test tank 10 for performing a low-temperature thermal shock test, a test tank 11 for performing a high-temperature thermal shock test, and alternately these test tanks. Test article transport mechanism 12 for immersing the test article
Is provided.

The test tanks 10 and 11 and the transport mechanism 12
Although not shown, it is disposed inside a casing having a heat insulating wall, and a transfer mechanism 12 is provided through a door in the casing.
The test specimens are put in and taken out.

The low-temperature test tank 10 has a box shape and contains a heat medium liquid 13 for low-temperature test. The low-temperature test tank 10 further includes a cooling coil 14 and an electric heater 15.
And a stirrer is incorporated. Cooling coil 14
Is for pre-cooling the low-temperature heat medium liquid 13 and forms an evaporator in a refrigeration unit including a condenser, an expansion valve and the like. The electric heater 15 is for heating the low-temperature heat medium liquid 13 and is incorporated in the low-temperature test tank 10 so as to be located in the low-temperature heat medium liquid. The stirrer, which is not shown, rotates the stirring blades by an electric motor so as to make the temperature of the heating medium liquid uniform. The stirring blades are arranged in the heating medium liquid, and The shaft is connected to the rotating shaft of a motor installed outside the low-temperature test tank.

The high-temperature test tank 11 also has a box shape, and contains a heat medium liquid 16 for high-temperature test. This high-temperature test tank 11 incorporates only an electric heater 17 and a stirrer. The electric heater 17 is provided with a high-temperature heating medium liquid 16.
And is arranged in the high-temperature test tank 11 so as to be located in the high-temperature heat medium liquid. Although not shown, the stirrer is, like the stirrer in the low-temperature test tank, a stirring blade of an electric motor in which the stirring blade is disposed in the heat medium liquid and the blade shaft is installed outside the high-temperature test tank. It is connected to a rotating shaft.

The transport mechanism 12 is a sample basket 1 for storing test articles.
8 and a drive mechanism for moving the sample basket 18 to each test tank. The driving mechanism is sprocket vehicle group 1
9 and an endless chain 20 wound around these sprocket wheels. Sprocket vehicle group 1
There are two sets 9 and chains 20, and the sprocket wheels are coaxially located at intervals in the front-rear direction on the drawing sheet. A rod 21 is arranged to bridge the chain 20 and another chain, and is fixed at both ends to these chains. The sample basket 18 is suspended from a rod 30 by a chain. The immersion of the test article in the high-temperature test tank 11 is performed by rotating one of the sprocket wheel groups 19 by the electric motor 22 to rotate the chain 20, and moving the sample basket 18 from the position shown in the figure onto the high-temperature test tank 11. , By lowering it toward the high temperature test tank 11,
In addition, for the low-temperature test tank 10, the sprocket wheel group 19 is reversed.

The test method will be described. In the thermal shock test, for example, the test specimen is subjected to a temperature of -65 ° C ± 1 ° C and a temperature of 150 ° C ±
This is performed by repeatedly immersing each of the heat medium liquids at 1 ° C.

Low-temperature heat medium liquid 13 and high-temperature heat medium liquid 16
Is composed of a fluorine-based inert liquid. More specifically, for example, the low-temperature heat medium liquid 13 is Fluorinert FC-77 (trade name) of Sumitomo 3M Limited, and the high-temperature heat medium liquid 16 is Fluorinert FC-77 of Sumitomo 3M Limited.
70 (product side). These heat medium liquids 13 and 16 are injected into each of the low-temperature test tank 10 and the high-temperature test tank 11. After the injection, the refrigerator and the companion machine are operated to pre-cool the low-temperature heat medium liquid 13 by heat exchange with the refrigerant flowing through the cooling coil 14, and the temperature of the low-temperature heat medium liquid 13 is made uniform by the stirrer. Let it be. The pre-cooling temperature is -67 ° C, which is lower than the test temperature. At the same time,
The electric heater 17 in the high-temperature test tank 11 is connected to a power source, the high-temperature heat medium liquid 16 in the high-temperature test tank 11 is preheated to 152 ° C. higher than the test temperature, and the high-temperature heat medium liquid 16 is stirred by the stirrer 20. Stirring is performed so that the temperature of the high-temperature heat medium liquid 16 becomes uniform.

Next, the test article is placed in the sample basket 18 and the transport mechanism 12 is operated. First, the sample cage 18 is transported to the low-temperature test tank 10 by the drive mechanisms 19 to 22, and then moved toward the low-temperature heat medium liquid 13. The test article is thereby immersed in the low-temperature heat medium liquid 13. At this time, since the temperature of the low-temperature heat medium liquid 13 rises due to the temperature of the test article, the test article finally reaches a temperature of -6.
Cool to 5 ° C. Then, the sample cage 18 is conveyed to the high-temperature test tank 11 and moved toward the high-temperature heat medium liquid 16 by the drive mechanisms 19 to 22, and the test article is immersed in the high-temperature heat medium liquid 16. The test article is heated to a temperature of 150 ° C. by the high-temperature heating medium liquid 16. Again, the sample basket 18 is conveyed to the low-temperature test tank 10 and the test article is immersed in the low-temperature heat medium liquid 13 therein, and thereafter, the low-temperature heat medium liquid 13
The test article is subjected to a thermal shock test by alternately immersing the test piece in the hot-medium medium 16 up to the number of times corresponding to the purpose of the test.

When the thermal shock test is performed, the heat medium liquid 1
Oxides, dust, and moisture are mixed in 3, 16, and the properties of the heat medium liquid are reduced by these impurities. Therefore, an operation for removing these from the heat medium liquid is performed. These are a pump 30, a dust removing filter 31, an acid removing filter 3
2. It is performed by means including a water separator 33, a water recovery tank 34, electromagnetic valves 35 to 43, and piping.

The pump 30 has a suction port connected to the high-temperature test tank 11 via a solenoid valve 35, and is connected to the low-temperature test tank 10 via solenoid valves 36 and 37, and a discharge port for the dust removal filter 31. And a water separation mechanism 33 via an electromagnetic valve 42, and a low temperature test tank 10 via an electromagnetic valve 41, an acid removing filter 32 and an electromagnetic valve 28, and at the outlet side of the acid removing filter. It is connected to the high temperature test tank 11 via an electromagnetic valve 41. The water separator 33 has a tank and a filter unit inside the tank, and a drain port at the bottom of the tank is connected to the water recovery tank 34 via an electromagnetic valve 43 and is a drain port for the heat medium liquid flowing inside the filter unit. Are connected to the low-temperature test tank 10 via a solenoid valve 39. The discharge port of the pump 30 is connected to a supply port that feeds into the inside of this tank.

The cleaning of the heating medium is performed from the high-temperature heating medium 16. The work opens the solenoid valves 35, 41, 40 ,
Start by activating pump 30. As a result, the high- temperature heating medium liquid 16 in the high- temperature test tank 11 is supplied to the electromagnetic valve 35, the pump 30, the dust removal filter 31, and the electromagnetic valve 4
1. Circulating through the acid removal filter 32, the solenoid valve 40 and the high temperature test tank 11, dust and acid are removed from the high temperature heating medium liquid 16 by the filters 31 and 32. When the circulation is continued for a predetermined time, the electromagnetic valves 35, 41, and 40 are closed, the pump 30 is stopped, and the cleaning of the high-temperature heat medium liquid 16 is completed. When the high-temperature heat medium liquid 16 is thus cleaned, the low-temperature heat medium liquid 13 in the low-temperature test tank 10 is cooled by the electric heater 15 from a pre-cooling temperature of −67 ° C. to a normal temperature, for example, a temperature of 20 ° C. Raise it back and forth.

The cleaning of the low-temperature heat medium liquid 13 is performed by using a solenoid valve 36,
This is done by opening 38, 41 and activating pump 30. As a result, the low-temperature heat medium liquid 13 inside the low-temperature test tank 10 is supplied to the electromagnetic valve 36, the pump 30, the dust removal filter 31, the electromagnetic valve 41, and the acid removal filter 3.
2 and the low-temperature test tank 1 via the solenoid valve 38 again.
The circulation is returned to zero, and dust and oxide contained in the low-temperature heat medium liquid 13 are removed by the filters 31 and 32. When the removing operation is continuously performed for a predetermined time, the electromagnetic valves 36, 38, and 41 are closed, the pump 30 is stopped, and the cleaning operation is completed. To remove the water from the low-temperature heat medium liquid 13, first, before cleaning the low-temperature heat medium liquid 13 , the solenoid valves 37 and 42 are opened, the pump 30 is operated, and the low-temperature heat medium liquid in the low-temperature test tank 10 is removed. 13 is stored in the tank of the water separator 33, and when the flow of the low-temperature heat medium liquid 13 is stopped, the solenoid valves 37 and 42 are closed, and the pump 30
The stop is performed by opening the electric solenoid valve 39.
When the electromagnetic valve 39 is opened, first, it accumulated in the tank, water
There only the low temperature heating medium liquid 13 which is separated is etc. also <br/> the cold test chamber 10. The water separated from the low-temperature heat medium liquid 13 is recovered in the tank 34 by closing the electromagnetic valve 39 and opening the electromagnetic valve 43 after a predetermined time has elapsed.

In the thermal shock test apparatus according to the present invention, when water is removed from the low-temperature heat medium liquid in the water separator 33, the removed water is prevented from clogging the filter in the filter unit.

The water separator 33 has a tank 45 and a filter unit 46 as shown in FIG. The tank 45 has a structure in which, for example, a hollow cylindrical body and a hollow bottom 47 having the same shape are integrally formed by communicating the internal space. The liquid port 48 has a drain port 49 and a drain 50 at the bottom 47, and the filter unit 46 is incorporated inside the bottom 47. As shown in FIG. 3, the filter unit 46 includes a filter 51 and filter holders 5 disposed at upper and lower ends of the filter 51.
2 and the low-temperature heating medium liquid 13 in the tank 45
Is not allowed to enter the filter unit 46 unless it passes through the filter 51. Inside the filter unit 46, a member 54 having a drain port 53 for the low-temperature heat medium liquid 13 is incorporated. However, the member 54 is disposed inside the filter unit 46 such that the drain port 53 is located higher than the upper end of the filter 51, and the pipe part forming the same passes through the receiver 52 and the tank 45. Extending outside the tank. The drain port 49 is provided at the tank bottom 47 so as to be higher than the drain port 53. As shown in FIG. 3, the air release pipe 55 is incorporated in the tank 45 with one end located in the upper space of the tank and the other end located in the filter unit 46.

In the water separator 33, the liquid supply port 48 at the top of the tank has the solenoid valve 42 and the dust removal filter 51
The outlet of the pump 30 is interposed, the pipe portion of the member 54 having the drain 53 is connected to the low-temperature test tank 10 via the solenoid valve 39, and the drain 49 is connected to the water via the solenoid valve 43. Each is connected to a collection tank 34. In removing water from the low-temperature heat medium liquid 13, when the low-temperature heat medium liquid 13 is circulated through the low-temperature test tank 10, the dust removal filter 31, the water separator 33, and the low-temperature test tank 10 by the pump 30, the tank 45 is removed. The low-temperature heat medium liquid sent from the liquid supply port 48 into the inside of the filter unit is a filter 5 of the filter unit.
The moisture is removed by 1 and enters the inside of the filter unit 46, is found by the member 54 from the drain port 53, and returns to the low-temperature test tank 10 via the electromagnetic valve 39. At this time, it is separated by the filter 51 and the bottom 4 of the tank.
The water 56 remaining in 7 is discharged from the drain port 49 to the outside of the tank 45, and is collected in the water recovery tank 34 through the electromagnetic valve 43. Although the discharge proceeds and the liquid level of the low-temperature heat medium liquid 13 decreases, the liquid discharge port 53 for the low-temperature heat medium liquid 13 is located higher than the upper end of the filter 51 as described above in the apparatus according to the present invention. The filter 51 is always located inside the low-temperature heat medium liquid 13, and the filter 51 does not contact the separated water 56. The drain port 49 is located at a position higher than the drain port 53 of the low-temperature heat medium liquid 13, and the water 52 separated on the low-temperature heat medium liquid
, The water 52 remaining in the tank
Can be reliably recovered in the water recovery tank 34.
In the liquid tank type thermal shock test apparatus according to the present invention,
Since the water 56 separated from the low-temperature heat medium liquid does not contact the filter 51, clogging of the filter 51 can be eliminated, and if so, it can be minimized.

Further, in this liquid tank type thermal shock test apparatus,
A float switch is incorporated in the water separator 33 so that even if the filter 51 is clogged, it can be recognized. Float switch is of a known having a switch which is actuated by the movement of the float and the float, only float of these are indicated by reference numeral 57 in FIG. 2. The float 57 is disposed on the bottom 47 of the tank 45, and the switch is part of an alarm circuit together with a timer. When the float 57 does not operate the switch after a preset time has elapsed. In other words, the water 5 separated from the low-temperature heat medium liquid 13
When the water surface does not change, the warning light blinks or an alarm sounds. Such an alarm means
If the filter 51 is clogged by other causes and the water surface does not drop for a certain period of time, a warning can be given to an operator or the like, so that the filter 51 can be clogged in advance and the test can be stopped without interruption. can do.

[0026]

As described above, the liquid tank type thermal shock test apparatus according to the present invention has the drain port disposed above the filter and the drain port.
By placing the mouth above the drain, the low-temperature heat medium
The body fluid level does not always drop from the top of the filter.
No. That is, the filter was always immersed in the low-temperature refrigerant liquid
In this state, the water separated on the low-temperature refrigerant liquid
No contact with luta. Therefore, there is no need to clean or replace the filter based on clogging of the filter due to moisture, and stable and highly reliable operation can be performed.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing the overall configuration of a liquid test tank type thermal shock test apparatus of the present invention.

FIG. 2 is an explanatory diagram showing a cross section of a water separator.

FIG. 3 is an explanatory diagram showing a cross section of a configuration around a filter unit in FIG. 2;

FIG. 4 is an explanatory diagram showing a configuration of a conventional water separator.

[Explanation of symbols]

10 low-temperature test tank, 11 high-temperature test tank, 12 transport mechanism, 13 low-temperature heat medium liquid, 16 high-temperature heat medium liquid, 33
Water separator, 45 ... tank, 46 ... filter unit,
49 ... drain outlet, 51 ... filter, 53 ... drain outlet, 56 ...
moisture.

Claims (1)

(57) [Claims] 1. A transport mechanism for alternately immersing a low-temperature test tank, a high-temperature test tank, and a test article in a heat medium liquid of the low-temperature tank and the high-temperature tank,
A water separator for removing water from the low-temperature heat medium liquid in the low-temperature test tank, the water separator having a tank and a filter unit disposed in the tank, and the low-temperature heat medium liquid discharged inside the tank. Is returned to the low-temperature test tank through the drain port inside the filter unit through the filter in the filter unit, and water separation is performed in the liquid tank type thermal shock test device that discharges residual moisture from the drain port in the tank. A liquid tank type thermal shock test apparatus, wherein a drain is disposed above a filter and a drain is disposed above a drain.