JPS6189429A - Cold shock testing device - Google Patents

Abstract

PURPOSE:To improve the safety of the titled device by a method wherein a composition is designed so that a heater is arranged in a low temperature room and the heater utilizes the one side evaporator of two refrigerating cycles connected by a gascade heat exchanger and other side hot gas, in a cold shock testing device for a semiconductor and the like. CONSTITUTION:A refrigeration medium gas discharged from the first compressor 21 of the first refrigerating cycle A is condensed due to dissipating the heat thereof into the open air and the like by a condenser 22, flowed into a gascade heat exchanger 24 through the first expanding valve 23, performs the heat exchanging with the second refrigerating cycle B, cools a compressed refrigera tion medium 25 of the second refrigerating cycle B. The refrigeration medium in the second refrigerating cycle B is flowed into an evaporator 27 of a low temperature chamber 2 via an expanding valve 26, and cools the low tempera ture chamber 2 by the evaporation. For the temperature controlling, a hot gas 29A of the first refrigerating cycle A is supplied into a heater 28 of the low temperature chamber 2 by controlling a solenoid valves 30, 32 and flow rate adjusting valves 31, 33. By said composition, the reducing of running cost and improvement of safety can be contrived.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a cold/hot gJ impact testing device for repeatedly testing cooling and heating of half-wrapped bodies, etc., and particularly to a structure that reduces running costs on the side of a cold room.

[Background of the invention]

The configuration of a conventional cooling/heating W/S test device will be explained with reference to FIGS. 2 and 3. In the figure, 1 is a test room, 2 is a low temperature room, and 3 is a high temperature room, and each of these rooms is independent. Further, an evaporator 4 and an electric heater 5 for temperature control are provided in the low temperature room 2, and an electric heater 6 and its heater 6 are provided in the high temperature room 3.
A heat storage body 7 is provided to store the amount of heat.

The cold air kept at a predetermined temperature by the evaporator 4 and electric heater 5 in the low temperature chamber 2 is delivered to the test chamber by opening dampers 1OA and 10B by a blower 9 directly connected to an electric motor 8.
supplied to Also, electric heater 6 and heat storage body 7 in high temperature room 3
The hot air maintained at a predetermined temperature is supplied to the test chamber 1 by opening the dampers 13A and 13B by the blower 12 directly connected to the electric motor 11.

However, in the above-mentioned thermal shock test device, the cold room 2
Since the temperature of the cold air is controlled by the electric heater 5, the amount of electric power increases accordingly, resulting in a problem that the running cost of the device increases. In addition, use of electric power U heater dJ
It's 3fr or more, which is not good from a safety standpoint.

[Purpose of the invention]

An object of the present invention is to provide a thermal shock testing device that can control the temperature of a cold room without using an electric heater, thereby reducing the running cost of the device and having high safety.

[Summary of the Invention] In order to achieve this object, the present invention includes a cascade double refrigeration cycle and a temperature control heater, and the evaporator and the heater of the refrigeration cycle are arranged in a low-temperature base circle. It is characterized in that the hot gas of the refrigeration cycle is circulated through the heater.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIG. 1st
The figure shows a cold room and refrigeration cycle system diagram in the thermal shock test apparatus of the present invention.

This thermal shock test device is the first pressure! 21, condenser 2
2. The first refrigeration cycle A and the second compression drinker ZB, which are composed of the first expansion valve 23, the cascade heat exchanger 24, the cascade heat exchanger 24, the second expansion valve 26, and the evaporator 2.
The second refrigeration cycle B is constructed from 7V, the heat exchanger 1r2B is used as a temperature control leg pA device, and Kinbibonti◇.

And, the former 6th person second city freezing cycle J hair A Mitsumasu 27 o.
The heat exchangers 28 are arranged in j order in a juxtaposed manner within the range of low temperature≧2. Further, refrigerant gas (hot gas) discharged from the first compression bale 21 of the first refrigeration cycle is passed through the heat exchanger 28. The hot gas outward path system 29A includes a first electric noise valve 30 and a first control valve 3.
12, a second magnetic square 3-2, and a second flow control valve 33 are provided. Cumulative 2 solenoid valve 32, M2 flow control valve 33r
-t, the second flow of the first electroacupuncture valve 301 is continued in parallel to the control valve 31; A check valve 34 is also provided in the hot gas return path system 29B. Note that 9 indicates a blower type machine inside the cold room 2.

Next, I will explain the effects of non-invention.

The refrigerant gas discharged from the first compression port 21 of the first refrigeration cycle is condensed by radiating heat to the outside air or cooling water in the condenser 22. This condensate is depressurized by the first expansion valve 23 and flows into the cascade heat exchanger 24, where it is transferred to the second refrigeration cycle B.
(by heat exchange with) and returns to the first compressor 21. Second
The refrigerant gas discharged from the second compressor 25 of the refrigeration cycle B radiates heat to the aforementioned 17g1 refrigeration cycle A in the cascade heat exchanger 24 and is cooled and compressed by 3XM. After the condensate is depressurized by the second expansion valve 26, it flows into the evaporator 627, where it cools the low-chamber circulating air by the blower 9, evaporates, and returns to the second compressor 25. At this time, in order to cool the inside of the cold room 2 and prevent it from becoming empty, a signal from a sensor (not shown) installed in the cold room 2 is used to control the first magnetization valve 30 or the second magnetization valve of the hot gas outward path system 29A. Tortoise valve 32t-O
The air is turned off and the refrigerant gas from the first pressure m machine 21 flows into the heat exchanger 28 to heat the air and adjust the temperature. Further, the required temperature change in the low temperature room 2 can be dealt with by adjusting the opening degrees of the first and second flow control valves 31 and 330.

As described above, according to this embodiment, the temperature of the cold air in the cold room 2 can be controlled without using an electric heater, so that running costs can be reduced. Furthermore, safety is improved because the number of places where electric heaters are used is reduced.

Furthermore, according to this embodiment, the first and second magnetic valves 3U, 3
2, and the first and second flow control valves 31 and 33 can control the heating TTL of the heat exchanger 28, that is, the temperature of the cold air can be controlled over a wide range.

〔Effect of the invention〕

As described above, according to the present invention, since the temperature of a cold room can be controlled without using an electric heater, the running cost of the equipment can be reduced, and the number of places where a heating device is used can be reduced. Therefore, safety is increased.

[Brief explanation of the drawing]

Fig. 1 shows an embodiment of the present invention, and Fig. f shows the cold room and cold α cycle system of the thermal shock test device.
The figure is a cross-sectional plan view of a conventional thermal shock testing apparatus, and FIG. 3 is a top view of the d-plane. 2... Low temperature room 27... Evaporator 28... Heat exchanger (temperature control heater) 29A... Hot gas outward path system A... First refrigeration cycle B... Second refrigeration cycle .

Claims (1)

[Claims] In a thermal shock test device, a test chamber, a low temperature chamber, and a high temperature chamber are arranged independently, and cold air from the low temperature chamber or hot air from the high temperature chamber is circulated through the test chamber by switching dampers.
A first refrigeration cycle and a second compressor, which are composed of a first compressor, a condenser, a first expansion valve, and a cascade heat exchanger;
A second refrigeration cycle comprising the cascade heat exchanger, a second expansion valve, and an evaporator, and a heater; the evaporator and the heater of the second refrigeration cycle are disposed in a low temperature chamber; A thermal shock test apparatus characterized in that the apparatus is configured to allow hot gas from the first refrigeration cycle to flow through the heater.