JP2786688B2 - Cooling / heating cycle equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a thermal cycle for examining the durability, strength, etc. of a precision instrument, its material and parts, and various other electronic components to a thermal shock and a thermal atmosphere such as a temperature cycle. Related to the device.

[Conventional technology]

Conventionally, in this type of apparatus, at the time of normal temperature exposure, outside air around the apparatus is introduced into the test chamber, and the temperature in the test chamber due to high temperature exposure or low temperature exposure before the normal temperature exposure is exchanged with the outside air, and the inside of the test chamber is exposed. It was approaching room temperature.

[Problems to be solved by the invention]

However, the following problem has occurred in such normal temperature exposure.

Room temperature exposure is not controlled. That is,
Since the outside air is introduced into the test tank, the temperature at normal temperature is not controlled (controlled), and as a result, the temperature accuracy of the hot atmosphere test is deteriorated. For example, high-temperature exposure and low-temperature exposure have an accuracy of, for example, ± 1 ° C.
Variation occurred in the range of about 40 ° C.

Condensation on the sample in normal temperature exposure after low temperature exposure,
Moisture absorbs the thermal energy to be given to the sample due to the condensation on the sample, or the sample is exposed to a high-humidity atmosphere.

In order to introduce outside air into the test tank, moisture in the outside air enters the test tank and condenses on the evaporator or animal cooler when exposed to low temperatures, which lowers the heat exchange capacity of the evaporator and reduces wind tunnel resistance. The increase in airflow caused a decrease in airflow. Further, when the moisture adheres to a seal packing portion for the purpose of heat insulation in an opening / closing damper provided between a high-temperature gas supply tank or a low-temperature gas supply tank and a test tank, and condenses when exposed at a low temperature, the seal portion is formed. A gap is created, gas leakage occurs,
Malfunction due to freezing of the damper had occurred.

Therefore, an object of the present invention is to control (control) the temperature of normal temperature exposure, thereby improving the temperature accuracy of the normal temperature exposure test to the same degree as that at the time of high temperature and low temperature exposure. Refrigeration cycle equipment that eliminates disturbance factors due to dew condensation, thereby improving the test accuracy, and at the same time, eliminating bad conditions such as icing and frosting on the equipment. To provide.

[Means for solving the problem]

According to the present invention, a test tank, a high-temperature gas supply tank, a low-temperature gas supply tank, a normal-temperature gas supply tank, a first group of vents connecting the test tank and each of the gas supply tanks, A second vent group that connects a test tank with each of the gas supply tanks and forms a pair with the first vent group; and a door that opens and closes each of the vent holes. A cycle device is provided.

In order to eliminate the moisture in the test tank, the test tank is provided with a dry gas introducing means such as dry air and nitrogen gas, and the gas in the test tank is introduced into the test tank by the introduction of the dry gas by the gas introducing means. An exhaust means may be provided for exhausting the gas so as to be maintained at a positive pressure slightly higher than the external pressure. The exhaust means may be, for example, an openable / closable exhaust duct.

(Operation)

According to the cooling / heating cycle device of the present invention, the sample is stored in the test tank, and when the sample is exposed to high temperature, the opening / closing door of the vent hole connecting the test tank and the high-temperature gas supply tank is opened, and all other doors are closed. In this state, the hot gas is circulated from the hot gas supply tank to the test tank, and the test is exposed to a high temperature atmosphere.

At the time of low-temperature exposure, the opening / closing door of the vent connecting the test tank and the low-temperature gas supply tank is opened, and all other doors are closed.
In this state, the low-temperature gas is circulated from the low-temperature gas supply tank to the test tank, and the sample is exposed to the low-temperature atmosphere.

In addition, at the time of normal temperature exposure, the opening / closing door of the vent connecting the test tank and the normal temperature gas supply tank is opened, and all other doors are closed. In this state, the room temperature gas whose temperature is controlled is circulated from the room temperature gas supply tank to the test tank, and the sample is exposed to the room temperature atmosphere.

When the test tank is provided with the drying gas introduction means and the exhaust means, in each exposure test, the drying gas is introduced into the test tank from the drying gas introduction means, and the test tank is already A part of the gas contained therein is discharged to the outside from the exhaust duct, whereby the inside of the test chamber is kept at a slightly positive pressure by the external pressure, and is kept more dry.

The low-temperature gas supply tank and normal temperature gas supply tank during high temperature exposure, the high temperature gas supply tank and normal temperature gas supply tank during low temperature exposure, and the high temperature gas supply tank and low temperature gas supply tank during normal temperature exposure, ,
Preparations can be made for the next use.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

The illustrated cooling / heating cycle apparatus includes a test tank 1, a high-temperature gas supply tank 2 provided adjacently below the test tank 1, a low-temperature gas supply tank 3 provided adjacently behind the test tank 1, and a test tank 1. A normal temperature gas supply tank 4 is provided adjacent to the upper side of the tank.

The test tank 1 has an openable / closable door 11 on the front surface for taking in / out a sample, and a heat insulating wall 12 between the test tank 1 and the high-temperature gas supply tank 2.
However, a heat insulating wall 13 is provided between the test tank 1 and the low-temperature gas supply tank 3,
Insulating walls 14 are provided between the test tank 1 and the room temperature gas supply tank 4, and the left and right sides of the test tank 1 are closed by the insulating walls 15, 15. The gas supply tank 2 is surrounded by the heat insulating wall 20, the gas supply tank 3 is surrounded by the heat insulating wall 30, and the gas supply tank 4 is surrounded by the heat insulating wall 40.

In each of the heat insulating walls 12, 13, and 14, a portion facing one end (the right end in FIG. 1) of the test tank 1 has a ventilation hole 21 connecting the test tank 1 and the high-temperature gas supply tank 2, and the test tank 1 And a low-temperature gas supply tank 3 and a ventilation hole 41 connecting the test tank 1 and the normal temperature gas supply tank 4 are provided with openable and heat-insulating doors 51, 61 and 71. .

In each of the heat insulating walls 12, 13 and 14, a portion facing the other end (the left end in FIG. 1) of the test tank 1 has a ventilation hole 22 connecting the test tank and the high-temperature gas supply tank 2, Vent hole 32 connecting the low temperature gas supply tank 3 to the test tank 1 and the gas supply tank 4
Are provided with open / closed heat insulating doors 52, 62, and 72.

Each of these doors is hinged directly or indirectly to the heat insulating wall so as to be rotatable from a position shown by a solid line in the drawing to a position shown by a two-dot chain line. For example, one that is driven by a piston / cylinder device directly or through an appropriate link mechanism, and that a rotating shaft connected to a door is driven by a motor through an appropriate gear transmission such as a worm gear. It is designed to be opened and closed by something like

The high-temperature gas supply tank 2 includes a heating heater 23 having an appropriate heater such as an electric heater or a steam heater built in an ingot made of aluminum or the like, and a normal electric or steam heater 24 disposed downstream thereof. Further, a gas circulation fan 25 is provided downstream of the heater and at a position facing the ventilation hole 21, and the fan 25 is driven by a motor 26.

Further, the low-temperature gas supply tank 3 is provided with a cooler 33 made of, for example, an ingot made of aluminum or the like, a cooler 34 arranged sequentially downstream thereof, a heater 35 for temperature control, and a fan 36 for gas circulation. The fan 36 faces the ventilation hole 31 and is driven by the motor 37.

The room-temperature gas supply tank 4 includes a heat exchanger 43 and a gas circulation fan 43 downstream of the heat exchanger and facing the vent hole 41, and the fan is driven by a motor 44.

Grids or steel plates 16, 16 are provided at both ends (left and right ends in FIG. 1) of the test tank 1 at positions inside the vent holes and the door, and these are used for the sample in the test tank 1. Although it is provided for safety so that it does not enter the ventilation hole, it is desirable that it has a rectifying function.

A pipe 5 for introducing air having a low dew point temperature (for example, -70 ° C.) as a dry gas is provided at one end (right end in FIG. 1) of the test tank 1. It can be opened and closed by an electromagnetic valve 51, and dry air can be introduced into the test tank 1 from an air source 52.

The test tank 1 further includes the other end (the left end in FIG. 1).
Is provided with an exhaust duct 6, and the duct 6 is provided with a damper 61 which is opened and closed by driving means such as a solenoid (not shown).
It has.

 In the figure, 81 is a control room, and 82 is a machine room.

According to this cooling / heating cycle device, a sample (not shown) is stored in the test chamber 1 by opening the door 11 and the door 11 is closed. Then, the sample is subjected to a high-temperature gas, a low-temperature gas,
The sample can be exposed to different thermal atmospheres such as a normal temperature gas, and the thermal shock, durability, strength, and the like of the sample with respect to various thermal atmospheres can be examined.

When the sample is exposed to the hot gas, the doors 51 and 52 leading to the hot gas supply tank 2 are opened to the position shown by the two-dot chain line in FIG. 1, and the other doors 61, 62, 71 and 72 are closed. The heating and heating unit 23 is continuously operated from a standby state described later, and the heater 24 is also operated.

In this state, the fan 25 is driven, and the high-temperature gas flows into the test tank 1 from the gas supply tank 2 through the vent hole 21 and returns to the tank 2 through the vent hole 22 from the test tank. It is heated again and is discharged into the test tank 1. Thus, the sample in the test chamber is exposed to a desired high temperature for a desired time.

During the high-temperature exposure, the low-temperature gas supply tank 3 and the normal-temperature gas supply tank 4 are operated in preparation. That is, in the low-temperature gas supply tank 3, the cooler 34 is operated, the cold heat is stored in the animal cooler 33, and a preparation is made so that a predetermined low-temperature gas can be supplied immediately in preparation for the next low-temperature exposure. In the room temperature gas supply tank 4, the heat exchanger 43 is operated in preparation for the next room temperature exposure.

When the sample is exposed to the low-temperature gas, the doors 61 and 62 leading to the low-temperature gas supply tank 3 are opened to the position shown by the two-dot chain line in FIG. 3, and the other doors 51, 52, 71 and 72 are all closed. The cooler 34 is continuously operated from the standby time, the fan 36 is driven, the low-temperature gas flows from the gas supply tank 3 through the vent hole 31 into the test tank 1, and further from the test tank through the vent hole 32. It returns to the tank 3, is cooled again in the tank 3, and is discharged to the test tank 1. Thus, the sample in the test chamber is exposed to a desired low temperature for a desired time.

During this low-temperature exposure, the high-temperature gas supply tank 3 is preliminarily operated so as to immediately supply a predetermined high-temperature gas in preparation for the next high-temperature exposure. The normal temperature gas supply tank 4 is also prepared.

When the sample is exposed to the room temperature gas, the doors 41 and 42 leading to the room temperature gas supply tank 4 are opened to the position shown by the two-dot chain line in FIG. 1, and the other doors 51, 52, 61 and 62 are closed. Heat exchanger
The operation of the fan 43 is continued from the stand-by state, the fan 43 is driven, and a gas at a predetermined temperature for exposing to normal temperature is discharged from the vent 41 to the test tank 1. The gas in the test tank 1 is sucked into the tank 4 from the vent hole 42, controlled to a predetermined temperature by the heat exchanger 43, and discharged to the test tank 1 again. Thus, the sample in the test chamber is exposed to a normal temperature gas at a desired temperature for a desired time.

During the exposure at room temperature, the high-temperature gas supply tank 2 and the low-temperature gas supply tank 3 are operated in preparation.

In each exposure operation, dry air is introduced into the test tank 1 from the air introduction pipe 5, and a part of the gas in the test tank is discharged out of the test tank by the exhaust duct 6, and thus the inside of the test tank 1 is The pressure is kept slightly positive than the atmospheric pressure, and the intrusion of outside air into the test tank is reliably prevented. By preventing the invasion of the outside air and introducing the dry air, the inside of the test tank 1 is kept in a good condition with less moisture.

According to the above-described embodiment, since the room temperature gas supply tank 4 having the heat exchanger 43 is provided, it is possible to manage (control) the room temperature exposure temperature, so that the room temperature exposure test state is constant regardless of the outside air temperature. And the reproducibility of the test state is improved.

In addition, since no outside air is introduced into the test tank 1 at the time of normal temperature exposure, moisture in the outside air is not taken into the test tank 1, so that the dew condensation of the sample is reduced accordingly, and external factors other than the temperature are eliminated.

Furthermore, the penetration of moisture into each tank is small,
Freezing in the low-temperature gas supply tank 3 is reduced, and the number of continuous cycles is increased (defrost timing is lengthened).
Furthermore, icing is reduced in the packing portion of the heat insulating door of each ventilation hole, and gas leakage due to generation of a gap per packing and malfunction of the door are reduced.

Note that the present invention is not limited to the above embodiment,
The present invention can be implemented in various other modes.

For example, in the above-described embodiment, a gas circulation fan is provided in each gas supply tank, but instead of these fans, each of the test tanks 1 is provided at one end (the right end or the left end in FIG. 1). A common fan device may be provided for the gas supply tank so that the gas is circulated to the test tank 1.

Further, the door that opens and closes each of the ventilation holes may be provided so as to operate linearly in a sliding door type, instead of a rotating type as in the above embodiment.

In the above embodiment, in the high-temperature gas supply tank 2,
Although the heater 24 and the heater 24 are separated from each other, this may be replaced with an integrated heating and heating device.

〔The invention's effect〕

 The cooling / heating cycle device of the present invention has the following advantages.

Since the normal temperature gas supply tank is provided, the temperature of the normal temperature exposure can be controlled (controlled), and thereby the temperature accuracy of the normal temperature exposure test can be improved to the same degree as the high temperature and low temperature exposure.

During exposure at room temperature, external moisture is prevented from being taken into the test tank, so that disturbance factors due to dew condensation can be eliminated, thereby improving test accuracy.

Since the external moisture is prevented from being taken into the test tank during the normal temperature exposure, adverse conditions such as freezing and frosting on the apparatus can be eliminated, and the number of continuous cycles in the test can be increased.

When the means for introducing dry gas and the exhaust means are provided in the test tank, the inside of the test tank is kept so dry,
Adverse conditions due to moisture are thus eliminated.

[Brief description of the drawings]

The drawings show an embodiment of the present invention. FIG. 1 is an overall schematic cross-sectional view as viewed from the front side, and FIG.
FIG. 3 is a sectional view taken along the line YY of FIG. 1. DESCRIPTION OF SYMBOLS 1 ... Test tank 2 ... High temperature gas supply tank 3 ... Low temperature gas supply tank 4 ... Normal temperature gas supply tank 21, 31, 41 ... First ventilation holes 22, 32, 42 ... 2nd ventilation holes 51, 52, 61, 62, 71, 72… Vent door 5… Air introduction pipe 6… Exhaust duct

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Yoshiro Tsujiko 3-5-6 Tenjinbashi, Kita-ku, Osaka-shi, Osaka Inside Tabai Espec Co., Ltd. (56) References JP-A-63-26547 (JP, A) JP-A-63-26547 54-32386 (JP, A) JP-A-61-245219 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G01N 3/60 G01N 17/00 G01R 31/00 B01L 11 / 00

Claims (2)

(57) [Claims] 1. A test tank, a high-temperature gas supply tank, a low-temperature gas supply tank, a normal-temperature gas supply tank, a first group of ventilation holes connecting the test tank and each of the gas supply tanks, and the test tank And a second vent group that pairs the first vent group with the gas supply tanks, and a door for opening and closing the vents. . 2. The test tank is provided with a drying gas introducing means, and the gas in the test tank is discharged by the introduction of the drying gas by the gas introducing means so that the inside of the test tank is maintained at a slightly higher positive pressure than the outside pressure. 2. The cooling and heating cycle device according to claim 1, further comprising an exhaust means for performing the cooling operation.