JPS5920096B2 - Cold and heat cycle equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention involves testing and processing samples of materials, parts, equipment, etc., by alternatingly exposing them to high and low temperature atmospheres, for example, JISC5030 electronic components. A cooling/thermal cycle device for carrying out tests such as those specified in the temperature cycle test of Regarding equipment.

The specimen and the exposure tank are kept stationary and the specimen is exposed to high temperature.
Low-temperature exposure C) Cold-heat cycle testing differs from testing by moving the specimen from a high-temperature exposure tank to a low-temperature exposure tank or vice versa, as mechanical stress is added to the thermal stress. does not become complex,
This makes it possible to perform highly reliable tests, and it is also different from the type in which the specimen is held still and the exposure tank is moved.
Also, the structure for maintaining the airtightness of the exposure tank does not become complicated. F. Conventionally, there is a known refrigeration cycle device that exposes the sample to high temperature and low temperature while keeping the sample and exposure tank stationary. is a path configuration in which the test area and the high temperature chamber are connected in a closed loop, and the test area and the low temperature chamber are connected in a closed loop. According to this, the path for high temperature exposure (closed loop of test area and high temperature chamber) and the path for low temperature exposure (closed loop of test area and low temperature path) are to be in the form of dedicated independent circuits. However, there is a disadvantage that the size of the entire device (space factor -) relative to the test area capacity I cannot be reduced.

Furthermore, with conventional equipment, the direction of wind circulation within the test area differs between high-temperature exposure and low-temperature exposure, which makes it impossible to apply thermal stress to the specimen under the same conditions during high-temperature and low-temperature exposure. Therefore, it is not always possible to conduct highly reliable cold and thermal shock tests. Therefore, the main purpose of the invention is to eliminate the drawbacks of the prior art described above, to considerably reduce the space factor, and to apply thermal stress to the specimen under the same conditions by exposing to high temperature and exposing to low temperature. Our goal is to provide cooling and heating cycle equipment that guarantees

The refrigeration cycle device of the present invention has six single sealed tanks as a test area for cold and thermal shock tests, a low-temperature air conditioning room, and a series connection closed loop path for ventilation. The first position closes the low-temperature air conditioning room and allows the wind from the test area to flow directly into the ventilation bath, and the second position allows the wind from the test area to flow directly into the ventilation bath. A damper with a rate of 1 is installed in the tank to allow the air to flow into the ventilation bath via the low-temperature air conditioning room, and a circulation blower and a heater for high-temperature air conditioning and low-temperature adjustment are installed in the ventilation bath. The feature is that the room is equipped with a low-temperature air conditioner. According to the present invention, by positioning the damper in the first position and operating the heater at a high air conditioning temperature, the test area in a single closed chamber serves as a high temperature exposure chamber and the damper is operated at a high air conditioning temperature. By switching to the second position and activating the cryo-air conditioner, the test area acts as a cryo-exposure bath.

In this way, cold and thermal shocks can be applied to the specimen while the test area, which is an exposure bath, and the specimen placed there remain stationary. According to the present invention, the inside of a single sealed tank is a series-connected closed loop path of a test area, a low-temperature air conditioning room opened and closed by a damper, and a Z ventilation path. In addition to serving as a low-temperature exposure tank, the ventilation path also serves as a common source of ventilation during high-temperature and low-temperature exposure. i.e. test area,
Low-temperature air conditioned room and ventilation bus The test area and ventilation path, which is the majority of the three-way series connection closed loop bus, are exposed to low temperature and high temperature, resulting in the failure as a common circuit. In addition to being used for air conditioning and low temperature adjustment, the entire device can be made compact.
The overall size of the equipment relative to the test area capacity (
The space factor (1) can be made as small as possible, and the conventional image that a device with a large effective capacity is large has been eliminated.

Moreover, according to the bus configuration of the present invention, the circulation of air during high-temperature exposure and low-temperature exposure is performed in the same flow in a one-way manner through the same ventilation path in the test area. It is ensured that heat stress is applied under the same conditions as with cold exposure.

A regenerator may be incorporated into the device of the present invention.

In such a case, the regenerator is installed together with the low-temperature air conditioner in the low-temperature air-conditioning room of the device of the present invention, and a wind shield plate is installed in the low-temperature air-conditioning room to convert the flow of wind between the low-temperature air conditioner side and the regenerator side. The wind shield plate is attached to the damper and allows wind to flow to the regenerator and the low-temperature air conditioner when the damper is in its neutral position, that is, in the intermediate open state, and when it is in the second position, it allows the air to flow through the regenerator and the low temperature air conditioner. Close the container to prevent wind from flowing into it and direct the wind to the low-temperature air conditioner. Conventionally, it is already known to incorporate a regenerator in a thermal shock tester, but in the past, the regenerator was placed in the wind circulation path for low temperature exposure, and it was cooled and stored at times other than low temperature exposure. The stored cold is exposed to low temperatures and at the same time exchanges heat with the high temperatures held by the sample.

According to this, if the temperature of the low-temperature exposure tank (low-temperature air conditioner) becomes higher than the test temperature for low-temperature exposure, the temperature must be lowered to the test temperature, including the low-temperature exposure tank temperature air conditioner However, there is a problem in that the heat load is placed on the regenerator 6 itself, and the time required to return to temperature after exposure to low temperatures becomes longer. Such problems can be solved by incorporating the regenerator and installing a damper according to the present invention. That is, according to this method, at the start of low-temperature exposure, the wind shield is placed in the non-closed position so that the wind also flows to the regenerator side, and the heat stored in the regenerator during pre-cooling is transferred to the sample. After completing the heat exchange with the heat held by the product, a regenerator operation control system can be used that closes the regenerator with a wind shield and diverts the wind flow to the low-temperature air conditioner.
If such a method is adopted, even if the temperature of the low-temperature exposure tank (low-temperature air conditioner) rises above the test temperature, the wind will not pass through the regenerator, so the regenerator will not be subject to heat load, and the temperature recovery time after low-temperature exposure will be reduced. It's short. Originally, the disadvantage of the 6 regenerator is to exchange heat with the heat load brought into the low-temperature atmosphere path by the sample in order to perform rapid temperature recovery during low-temperature exposure in the thermal shock test.

Therefore, after the heat stored in the regenerator by pre-cooling has exchanged heat with the heat load of the specimen, the regenerator is no longer needed until the start of the next low-temperature exposure. In this regard, in the present invention, after the regenerator has fulfilled its role, the air can be directed to the low-temperature air conditioner instead of the regenerator, so the usefulness of the regenerator can be maximized. . Moreover, in the present invention, since the wind shield plate for controlling the operation of the regenerator is attached to the damper, the above effect can be achieved simply. In the present invention, the regenerator includes a regenerator made of a large number of stacked parallel metal plates or metal blocks, and a large number of heat dissipation fins extending from the regenerator. It is possible to use one with a cooling pipe passed through it.

Such a regenerator can improve the cooling efficiency of the regenerator because it can directly cool the regenerator by flowing a cooling fluid such as a refrigerant through the cooling pipes of the regenerator, and also has a large number of heat dissipation fins extending from the regenerator. An extremely wide heat exchange area can be obtained, and by flowing the air from the circulation circuit of the cooling/heat cycle device between these heat radiation fins, this can be efficiently exchanged with the heat stored in the regenerator. When the cold storage section of a cold storage device consists of a large number of metal plates stacked in parallel, the number of stacked metal plates that make up the cold storage section can be increased or decreased depending on the storage space and the degree of cooling required to achieve appropriate cooling. Easily obtain a regenerator with this capability. Embodiments of the present invention will be described below with reference to the drawings.

An embodiment of the first invention (the invention described in claim 1) is shown in FIG. 1, and the second invention (invention described in claim 2) is shown in FIG. It is shown. In the figure, reference numeral 1 denotes a single closed tank, and the inside is a closed-loop bath with a test area 2 for cold and thermal shock tests, a ventilation path 3, and a low-temperature air-conditioned room 4 connected in series.

The ventilation path 3 is provided with a heater 5 for high-temperature air conditioning and low-temperature air conditioning, and a circulation blower 6, and the low-temperature air conditioning room 4 is provided with a low-temperature air conditioner 7.

A single damper in a first position that allows the air from the test area 2 to flow directly into the ventilation bus 3 and in a second position that allows the air from the test area 3 to enter the ventilation path 3 via the low-temperature air conditioning room 4 8 is provided in tank 1.

It is equipped with a shaft 10 that is moved up and down by an eight-damper drive machine 9 (for example, a linear head), and can be moved between a first position and a second position. For opening and closing of the damper, a rotation type as in the second embodiment of the present invention to be described later can also be adopted. When the damper 8 is in the position shown by the solid line in FIG. 1 (first position), the low temperature air conditioning room 4 is closed, and when it is in the position shown by the chain line (second position), the low temperature air conditioning room 4 is opened. .

When the low-temperature air-conditioned room 4 is open, that is, exposed to low temperatures, the heater 5 is operated at a temperature that matches the low-temperature adjustment to perform the necessary temperature control, and at the same time when the low-temperature air-conditioned room 4 is closed, that is, switched to high-temperature exposure. The heater 5 is operated at a required high temperature and acts as a high temperature air conditioner.

During low temperature exposure, the wind from test area 2 flows into low temperature air conditioned room 4.
The air from the test area 2 flows directly into the ventilation path 3 during high temperature exposure. Note that the first
In the figure, numeral 11 indicates a regenerator. For this, a structure as described later can be used.

In FIG. 2, reference numeral 12 indicates a wind shielding plate, and in FIG. 2, the same reference numerals as in FIG. 1 indicate the same parts.

A heat insulating plate 19 is provided between the low temperature air conditioner 7 and the regenerator 11. The wind shield plate 12 is attached to a damper 18 by a support arm 15, and the damper 18 is connected to a shaft 14 that is moved up and down by a drive machine 13, and is opened and closed by being rotated around a central axis by the shaft. When the damper 18 is in the neutral position, the wind shield plate 12 does not close the regenerator 11, and the wind from the test area 2 flows through the low-temperature air conditioner 7 and the regenerator 1.
At the second position of the damper 8, the wind shield plate 12 closes the regenerator 11 so that the wind does not flow thereto, and allows the wind to flow to the low-temperature air conditioner 7 side.

The regenerator 11 includes a regenerator 11a and a large number of heat radiation fins 1 extending from the regenerator 11a, as shown in detail in FIGS. 3 to 5.
1b, and the cooling pipe 16 is passed through the cool storage section 11a.

The cold storage section 11a may be composed of a parallel body of a large number of metal plates, for example, aluminum plates stacked one on top of the other (FIGS. 3 and 4), or a metal block (FIG. 5). In this case, metal plates with larger heights and metal plates with smaller heights may be stacked alternately (Fig. 3), and the upper half of the taller metal plate may be used as the heat dissipation fin 11b. Metal plates of the same shape, thicker on the half side and thinner on the upper half, are stacked on top of each other (Fig. 4), and the thinner upper half is used as a heat dissipation fin 1.
It is better to set it to 1b. A cooling fluid such as a refrigerant flows through the cooling pipe 1611C. The number of cooling pipes 16 may be one or more. It is preferable that the plurality of metal plates stacked in parallel are tightened using a tightening rod 17 so that no gaps are created. In the cool storage unit 11, the heat dissipation fins 11b are installed in the direction along the flow direction of the wind, and the O cooling pipe 16 through which the wind flows through the gap 18 between the heat dissipation fins 11b is the pipe 16 of the cool storage unit 11.
It is preferable to expand the tube by an appropriate means known per se so that there is no gap between the tube and the through hole.

When gaps occur, cooling efficiency decreases. When starting low-temperature exposure, first move the damper 18 to the neutral position, and then move the windshield plate 12 to the neutral position.
is in the non-closed position, and the wind is passed through the low temperature air conditioner 7 and the regenerator 11.
The heat previously stored in the regenerator 11 is exchanged with the heat held by the sample in the test area 2.
When the heat exchange is completed, the damper 18 is placed in the second position and the regenerator 11 is closed by the wind shield plate 12, so that the wind blows away from the regenerator 1.
Avoid flowing to the 1 side.

The displacement of the damper 8 toward the regenerator 11 can be performed under automatic control. This means, for example, that there is a temperature inside the regenerator 11 and the test tank 2. This objective is achieved by arranging a heat exchanger, which detects the end of the heat exchange, and drives the damper 8 based on the detection. In the first and second embodiments of the present invention, when the inner surface of the tank 1 is formed of a metal plate such as stainless steel, it is preferable to cover the metal plate with a heat insulating material.

The insulation is designated by the numeral 20 in FIGS. Thermal insulation 20 is the partition 2 between the test area 2 and the path 3
The insulation material 20 can be applied to the inner surface of the tank 1 or the partition 21 by using adhesive, stud fixing, or pressing the insulation material with wire mesh or inorganic fiber mesh. Alternatively, it can be constructed by using them together. Various kinds of heat insulating materials can be used as the heat insulating material 20, but one having very low thermal conductivity, excellent heat and cold resistance, and no moisture absorption is particularly advantageous.

Examples of such heat insulating materials include silica sponge and foam glass, with silica sponge being particularly suitable. By adhering or covering this surface with glass cloth, it is possible to prevent the silica sponge from being damaged and also to enhance the heat insulation effect.

[Brief explanation of drawings]

FIG. 1 is a longitudinal side view showing an embodiment of the first invention, FIG. 2 is a longitudinal side view showing an embodiment of the second invention, and FIG.
Figures 4 and 5 are longitudinal sectional views illustrating different types of regenerators. 1 is a single closed tank, 2 is a test area, 3 is a ventilation path,
4 is a low temperature air conditioning room, 5 is a heater for high temperature air conditioning and low temperature adjustment,
6 is a circulation blower, 8 is a damper 9, 13 is a damper driver, 10.14 is a vertical movement shaft. 11 is a regenerator, 1
2 is a wind shield, and 15 is a wind shield support arm.

Claims (1)

[Claims] 1. The inside of a single sealed tank is a test area for cold and thermal shock tests, a low-temperature air conditioning room, and a series connection closed loop path of a ventilation path, and a first position and a second The first position closes the low-temperature air conditioning room and allows the air from the test area to flow directly into the ventilation path, and the second position allows the air from the test area to flow directly into the ventilation path. A single damper is installed in the tank to allow air to flow into the ventilation path via the air conditioning room, a circulation blower and a heater for high temperature air conditioning and low temperature adjustment are installed in the ventilation path, and low temperature air conditioning is installed in the low temperature air conditioning room. A cooling and heating cycle device characterized by being equipped with a container. 2 The inside of a single sealed tank is used as a test area for cold and thermal shock tests, a low temperature air conditioning room, and a series connection closed loop path for ventilation paths, and two positions, the first position and the second position. The first
At the second position, the cold air conditioning room is closed and the air from the test area flows directly into the ventilation path, and at the second position, the air from the test area is closed through the cold air conditioning room and into the ventilation path. A damper is provided in the tank, a circulation blower and a heater for high-temperature air conditioning and low-temperature adjustment are installed in the ventilation path, and a low-temperature air conditioner and a regenerator are installed in the low-temperature air conditioning room, and the damper is attached to the damper. Allow wind to flow to the regenerator and low-temperature air conditioner with the damper in the neutral position, and
A cold/thermal cycle device characterized in that a low-temperature air conditioning room is provided with a wind shield plate that closes the regenerator to prevent wind from flowing into the regenerator at the position of , and allows the wind to flow toward the low-temperature air conditioner.