JPS60517A - Multiply-connected constant-temperature constant-humidity tank - Google Patents

Abstract

PURPOSE:To extremely miniaturize a device and, at the same time, improve the reliability, by putting the compressor, condenser, accumulator, and air blower of a cooler system of each tank in a machinery room in a lump and the control device of electric systems in an electric box commonly to each tank. CONSTITUTION:Tanks 11, 12, and 13 are constituted in such a way that they are piled up in one body and separated from each other with a heat insulating material. A cooling machine system of compressor 14, accumulator 15, condenser 16, and air blower 17, which is common to each tank, is put in a machinery room 21. Moreover, a heater 22, humidifier 23, temperature sensor 24, humidity sensor 25, air blower 26, and guide fan 27 are respectively installed to each tank. In addition to the above, the electric controlling section of the air blower 17, etc., commonly used for each tank is contained in an electric box 28. Therefore, the device is miniaturized and the power consumption is greatly reduced by commonly using the machinery room and electric box and, also heat insulating walls to the tanks 11, 12, and 13. Thus a highly reliable constant temperature constant humidity tank can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an environmental testing device, and more particularly to a multiple constant temperature and humidity chamber that integrates a plurality of constant temperature and humidity chambers with different test conditions.

[Background of the invention]

Conventionally, a constant temperature and humidity chamber is generally used when confirming or predicting reliability regarding temperature resistance and moisture resistance of electronic components. Especially when predicting reliability, "<
Selecting a few temperature and humidity conditions, for example 3 or 5 conditions, applying stress to electronic components under these various conditions, and predicting reliability in the market based on the number of deteriorations. In such a case, if tests were to be conducted simultaneously in a single tank according to the prior art, three constant temperature and humidity chambers would be required for three conditions, and five constant temperature and humidity chambers would be required for five conditions. FIG. 1 shows a schematic configuration diagram of a constant-temperature single bath according to the conventional technology, where 1 is made of cypress, 2#'i,
Machine room, 3 is electrical box, 4 is heater, 5 is cooler,
6 is a humidifier, 7 is a temperature sensor, 8 is a humidity sensor, 9 is a blower, and 10 is a guide fin, and the arrows indicate the wind direction.

However, when conducting tests simultaneously using a single tank as described above, the first disadvantage is that many constant temperature and humidity chambers are required, which requires an enormous amount of installation space. Generally, these tests are performed in units of 1,000 to 2,000 hours, consuming a large amount of power. The third drawback was that a lot of similar equipment was used, leading to a lot of wasted equipment.

[Purpose of the invention]

The purpose of this invention is to eliminate the above-mentioned drawbacks of the prior art.
Our goal is to provide constant temperature and humidity chambers that save resources and energy.

[Summary of the invention]

In short, this invention integrates a plurality of tanks partitioned by heat insulating material, each tank is equipped with a heater, a cooler, and a humidifier, and a cooling system that operates the coolers, that is, a common compressor for each tank. , condenser, accumulator and sending M, machine are:
They are all housed in a machine room and connected to each type in parallel via electromagnetic valves and pressure reducers, and the electrical system control device has a common control circuit for each type housed in an electrical box.

[Embodiments of the invention]

Hereinafter, the structure will first be explained with reference to FIG. 2, which is a schematic block diagram of embodiments of the present invention. Reference numerals 11, 12, and 13 indicate tanks, which are stacked and integrated and partitioned with heat insulating material. 14#: i compressor, 15
is an accumulator, 16 is a condenser, 17 is a blower, 18
is the solenoid valve for tank 11, 19 is the pressure reducer for tank 11, 20 is tank 1
The coolers for cypress 12 and cypress 13 have the same construction as shown in the figure, and the cooling mechanical system common to each tank is housed in the machine room 21. Further, 22 is a heater, 23 is a humidifier, 24 is a temperature sensor, 25 is a humidity sensor, 26 is a blower, 27 is a guide fin, and the other various types 12 and 13 have the same structure. Further, electric control units such as the air blowers 8 and 17 commonly used for each tank 11, 12, and 13 are housed in an electric box 28.

Next, the operation will be explained. In this invention, one compressor 14
The temperature in each tank is controlled by the heater 22 in each tank 11, 12, 13. That is, to explain the tank 11, if you want to set the temperature of the tank 11 lower than the temperature outside the tank, turn the cooler 2° ON and OFF (solenoid valve 1
8 ON/OFF') On the other hand, if you want to increase the temperature, control the heater 22 by turning it ON/OFF. These are determined and controlled by signals from the temperature sensor 24 and an external temperature sensor (not shown). When only one tank is operated, or when the coolers 20 of all the tanks are operated at the same time, the speed of the compressor 14 is controlled by controlling the rotation speed of an inverter (not shown). The cooling capacity is adjusted by setting the rotation speed to the full speed rotation speed, the full speed rotation speed minus the full speed rotation speed, and the full speed rotation speed 5 rotations. Note that the cooling system uses 7 Leon gas as a refrigerant, as in the prior art, and the amount of gas flowing into each type is controlled by electromagnetic valves 18. on the other hand,
Humidity is humidified by various humidifiers 23 and controlled to a set humidity through a humidity sensor 25.

In this invention, the various temperature settings of the tanks 11, 12, and 13 can be set, for example, when the tank 11 is at a high temperature, the tank 12 can be set at a medium temperature, and the tank 13 can be set at a low temperature.
The tank 11 can be set at a low temperature, the tank 12 at a medium temperature, and the tank 13 at a high temperature. In this way, various temperature and humidity settings are made by setting the temperature of the intermediate tank, for example, tank 12 in this embodiment, as the center of the set temperature, and setting the tanks 11 and 13 above and below it to high or low temperatures. .

Next, the energy saving effect in the above case will be explained in detail. Conventionally, when each type exists independently, each type radiates heat from its wall surface according to the temperature difference between it and the installation environment temperature. Assuming that the temperature is set to high temperature, medium temperature, and low temperature in order starting from the bottom tank 13, for example, in Figure (b), the middle tank 12
As shown in the model, the upper wall surface 29 of the tank 12
In this case, side wall surfaces 50, 31, 32 which dissipate heat equivalent to the conventional one.
The temperature difference is smaller than that at 63°, so there is less heat dissipation, but the lower wall surface 34 is on the side that absorbs heat, so the amount of retained heat can be reduced. A quantitative explanation of this relationship is as follows. -Well, as a condition for using a constant temperature and humidity chamber,
Tank 11 at 40'C/95cm RH1 Tank 12 at 60°C/9
5% RH1 and tank 13 at 80°C/95% RH, the environmental temperature outside the tank at 20'G, and various 11, 1
It is assumed that each wall surface in 2.13 is made of the same material, has the same thermal resistance per unit area, and that the heat dissipation effect due to convection on the wall surface is the same on the inner and outer surfaces of the wall. It is assumed that the amount of heat supplied Q is approximately proportional to the product of the heat radiation area S of the wall surface and the temperature difference ΔT inside and outside the tank. The height of each column 11, 12゜13 is 0.5
m, width and depth are both 1m, and in the case of a conventional single tank, if each of the three cypresses is set to the above temperature conditions, the total amount of heat supplied from each type Qs is: QB = 480 (m2' C, ), whereas the total amount of heat supplied 'jjkQc in the case of triple installation of this invention is QC-540[m'・0C], which is Qc/Qs-0,708. In this case, approximately 30 yen of energy can be saved compared to a conventional single tank.

In addition, since this invention is configured so that the control program for each column can be set arbitrarily as described above, the inside of the tank is placed in a higher temperature and humid environment than a general high temperature tank. , blower section.

The seal portion, tank inner wall surface, etc. are exposed to extremely severe environmental conditions, and the stress increases as the temperature and humidity increase. For example, as the above test conditions, 40°C / 95% PH and 8
Comparing 0°C/95% RH, the latter is 6.4 times the former in terms of vapor pressure as a measure of stress. In this invention, the low-stress tank and the high-stress tank are set to be replaced after the required period of use, so the life of the triple constant temperature and humidity tank can be significantly extended, and the reliability is high. All constant temperature and humidity chambers can be provided. In addition, in the above description, for the sake of convenience, a triple constant temperature and humidity chamber was described, but the present invention is not limited thereto, and can be applied to a multiple constant temperature and humidity chamber.

[Effects of the Invention] As explained above, according to the present invention, the machine room and electrical box that were conventionally attached to each tank can be shared, and the size can be reduced by sharing the heat insulating wall. Not only can the number of equipment be significantly reduced, but the installation space can also be reduced, and power can be significantly saved. In addition, as detailed above, by setting the temperature difference between various types of multiple units to a minimum, power savings can be expected, and by changing the stress conditions in each column, multiple units can be set at constant temperature and humidity. The life of the tank can be significantly extended, and a highly reliable constant temperature and humidity tank can be provided.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a schematic diagram of a conventional constant temperature and humidity single tank; Fig. 2 is a schematic diagram of an embodiment of the present invention; 1.11, 12.13...Tank, 2.21...Machine room, 3,28 ...electrical box, 4.22--heater, 5,20°...cooler, 6.25...humidifier, 7.
24... Temperature sensor, 8° 25... Humidity sensor,
9,17.26...Blower, 10.27...Guide fin, 14...Compressor, 15...Accumulator, 16...Condenser, 18...Solenoid valve, 19... Pressure reducer, 29... upper wall surface of the tank, 30-33... side wall surface of the tank. 34...Hinoki Shimokabe Patent Attorney Akio Takahashi Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] A plurality of tanks partitioned by heat insulating materials are integrated, each tank is provided with a heater, a cooler, and a humidifier, and a compressor and a condenser common to each tank operate the coolers. . The Akiemulator and the blower are housed together in the machine room, and the various coolers are connected in parallel via solenoid valves and pressure reducers, and the electrical system control device is connected to a common circuit in the electrical box. A multiple constant temperature and humidity chamber, characterized in that one of the cypresses at both ends is used as a high temperature chamber and the other as a low temperature chamber.