JPH0522868Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an apparatus for carrying out a current conduction test on electronic components such as semiconductors while changing environments such as temperature and humidity.

Prior Art As shown in FIG. 2, a conventional line-type environmental testing device includes a conveying means 2 such as a belt conveyor, and a testing device 3 in an environmental testing device 1 covered with a heat insulating material.
etc., the environmental test chamber 1
On the other hand, an apparatus is known in which constant temperature air is introduced from a constant temperature air supply device 5 via a duct 4, and returned to the constant temperature air supply device 5 via an exhaust duct 6 for circulation. The constant temperature air supply device 5 has a constant temperature air outlet 7, an inlet 8, and an outside air inlet 9, and includes a dehumidifying dryer 10, an air circulation fan 11, a refrigeration cycle evaporator 12, and a heater 1.
3rd class is installed.

In the above configuration, constant temperature air is supplied into the environmental test chamber 1 from the constant temperature air supply device 5 via the duct 4, and the constant temperature air is sucked through the duct 6 again and returned to the air supply device 5.

Problems to be solved by the invention However, in the case of such conventional environmental test equipment, constant temperature air is introduced from a constant temperature air supply device through a duct, so there is heat loss around the duct. However, there was an inconvenience that the volume of air circulation was determined by the diameter of the duct. Furthermore, since the environmental test chamber and the constant temperature air supply device are manufactured separately and connected through a duct, there is the disadvantage that the installation space becomes large.

SUMMARY OF THE INVENTION In view of the drawbacks of the prior art, it is an object of the present invention to provide an environmental testing device that requires less detailed installation instructions and has less heat loss.

Means to Solve the Problem In other words, the present invention consists of an environmental test chamber covered with a heat insulating material, a conveyance means such as a belt conveyor for conveying the test equipment installed in the environmental test chamber, and energization of the test equipment. In a line-type environmental test device consisting of a test device for conducting a test, the environmental test chamber is connected to an environmental test chamber and a constant temperature air supply tank through a partition plate, while supplying electricity between each tank through an inlet and an outlet. The constant-temperature air supply tank is divided into sections, consisting of a blower installed near the outlet, a refrigeration cycle evaporator installed near the intake port, and a heating device installed between the evaporator and the blower. This purpose is achieved using a line-type environmental testing device.

Function: In the environmental test device according to the present invention, air sucked through the suction port is cooled by the evaporator of the refrigeration cycle. The chilled air is heated to a predetermined temperature by a heating device, and then blown into the environmental test chamber from a blower installed near the outlet to maintain the electronic components placed on the belt conveyor at a predetermined temperature. . The air in the environmental test tank is sucked in through the inlet provided in the partition plate, cooled again, and circulated through the constant temperature air supply tank and the environmental test tank.

Embodiment The present invention will be explained in detail below according to an embodiment shown in the drawings.

In FIG. 1, 20a is an environmental test chamber of a line-type environmental test device covered with a heat insulating material 21,
The interior of the environmental test chamber 20 is partitioned into an environmental test tank 23 and a constant temperature air supply tank 24 via a partition plate 22. Inside the environmental test tank 23, a belt conveyor conveyor device 25 for conveying electronic components and the like is installed.
The partition plate 22 that partitions the environmental test tank 23 and the constant temperature air supply tank 24 has an inlet 26 at the side of the transport device 25 in the center, and an inlet 26 at both ends of the environmental test tank 23 corresponding to the entrance and exit of the transport device 25. Discharge port 27a, 2
7b is opened, and both tanks are in communication. Inside the constant temperature air supply tank 24, blowers 28a and 28b are installed near the discharge ports 27a and 27b.
In addition, a compressor 29 and a condenser 3 are located near the suction port 26.
0, an evaporator 32 connected for circulation to a capillary reach tube 31 is installed. Heaters 33a and 33b are installed near the outlet of the evaporator 32 to heat the air to a predetermined temperature. The constant temperature air supply tank 24 is connected to a compressed air supply device 34 for making the air pressure inside the environmental test tank 23 positive.
is connected to. Note that 35 is a guide plate for guiding the flow of air within the constant temperature air supply tank 24.
Further, 20b is an environmental test chamber that creates different temperature environments, and its internal structure is the same as that described above. 3
Reference numeral 7 is a test device for carrying out an energization test.

In the configuration described above, in the apparatus according to the present invention, the electronic components and the like 36 placed on the belt conveyor 25, which is a transport device, move within the environmental test tank 23. At this time, constant temperature air at a predetermined temperature is supplied into the environmental test tank 23 from blowers 28a and 28b installed in the constant temperature air supply tank 24. The supplied constant temperature air is heated or cooled to a predetermined temperature of the electronic components 36 and the like. The heated or cooled air is sucked through the suction port 26 provided at the center of the partition plate 22, cooled by the evaporator 32 of the refrigeration cycle, and heated to a predetermined temperature by the heaters 33a, 33b. The heated air flows along the guide plate 35 and is discharged from the discharge ports by blowers 28a, 28b mounted near the discharge ports 27a, 27b. If the air is simply circulated, the inside of the environmental test tank 23 will be in a normal pressure state, and there is a risk that air will enter from the entrance/exit of the conveying device.
4 and introduce dry air into the environmental test chamber 23.
Maintains positive pressure inside.

In this embodiment, the environmental test tank 23 and the constant temperature air supply tank 24 are separated by an inlet 26 which is a hole in the partition plate 22,
Although the configuration is such that the communication is made through the discharge ports 27a and 27b, the present invention is not limited thereto.As shown in FIG. 3, the guide plate 35 provided in the constant temperature air supply tank 24 in FIG. It is also possible to install a partition plate 22 to guide air only to the same position, and to use a configuration in which both ends of the environmental test tank are used as exhaust ports 27a and 27b, and the center part is used as an intake port 26.

As described above, in the embodiments of the present invention,
Since the constant-temperature air supply device itself is installed inside the environmental testing device covered with insulation, there is little energy loss. Furthermore, since the inside of the constant temperature air supply tank is configured to guide air with a guide plate, no duct is required.

Effects Unlike conventional devices in which constant-temperature air is guided into the environmental test device through a duct, the device according to the present invention has a constant-temperature air supply device installed inside the environmental test device covered with a heat insulating material. Since I configured it,
Heat loss through ducts is eliminated, resulting in high energy efficiency.

Since it is configured to blow air without going through a duct, there is no restriction on air volume compared to conventional environmental test equipment, and the air circulation rate is extremely high. Furthermore, if the configuration is such that dry air is introduced from a compressed air dehumidifier or the like without introducing outside air, there is no dew condensation inside the environmental test apparatus when returning from a low temperature state to a room temperature state.

As overall energy efficiency increases,
Compared to conventional devices, power consumption is reduced and an economical device can be provided. In addition, the conventional environmental test device had an environmental test tank and a constant temperature air supply device provided separately, but since they are integrated, the installation space can be small.

[Brief explanation of drawings]

FIG. 1 is a plan sectional view of a device showing one embodiment of the present invention, FIG. 2 is a plan sectional view of a device showing a prior art, and FIG. 3 is a plan view of a device showing another embodiment of the present invention. FIG. 1... Insulation material, 2... Conveying device, 3... Environmental test tank, 4, 6... Duct, 5... Constant temperature air supply device, 7... Outlet, 8... Inlet, 9... Outside air Inlet, 10... Dehumidifying dryer, 11... Air circulation fan, 12... Refrigeration cycle evaporator, 13...
... Heater, 20 ... Environmental test chamber, 21 ... Insulation material, 22 ... Partition plate, 23 ... Environmental test chamber, 24
... Constant temperature air supply tank, 25 ... Conveyance device, 26 ...
...Intake port, 27a, 27b...Outlet port, 28a,
28b...Blower, 29...Compressor, 30...
Condenser, 31... Capillary reach tube, 32...
...Evaporator, 33a, 33b...Heater, 34...
...Compressed air supply device.

Claims (1)

[Scope of utility model registration request] A line consisting of an environmental test chamber covered with a heat insulating material, conveyance means such as a belt conveyor for conveying electronic components installed in the environmental test chamber, and testing equipment for conducting electrical conduction tests on electronic components. In the type environmental test apparatus, the environmental test chamber is divided into two parts, an environmental test tank and a constant temperature air supply tank, through a partition plate, and the constant temperature air supply tank is provided near the entrance and exit of the conveyance means of the environmental test tank. It communicates with the environmental test tank through two outlets and an inlet provided in the center of the partition plate, and a blower is installed near the outlet, and an evaporator of the refrigeration cycle is installed near the inlet, and the evaporator and blower are connected to each other. 1. A line-type environmental testing device, characterized in that two heaters are installed in a constant temperature air supply tank that communicates with the constant temperature air supply tank, and the constant temperature air supply tank is further connected to a compressed air supply device.