SU1762302A1 - Thermal chamber - Google Patents

Abstract

The invention relates to a test technique and can be used to test electronic products at positive and negative temperatures. The purpose of the invention is to increase the reliability and expand the scope of the heat chamber. The heat chamber contains a heat-insulated housing 1, a collector 2 with nozzles 3, a fan 4, an evaporator 5, a heater 6, a contact unit 7 in which tare-satellites with test devices are placed with a gap relative to each other, a drive of forced movement and fixation of tar-satellites against the corresponding nozzles 3, made in the form of a comb-driven comb, provided with protrusions for fixing tar-satellites and connected through pushers with a cam, and the nozzles 3 are arranged with a pitch greater than the height of the companion-satellite of maximum gab Arytham test device. 1 hp f-ly, 4 ill. (L with

Description

The invention relates to a test technique and can be used to test electronic products at positive and negative temperatures.

A climatic chamber is known, which contains a heat-insulated casing, the cavity of which is divided by a partition into two parts, in one of which a fan is installed with a heater installed under it. Under the heater there is a device for supplying the vapor-liquid mixture of the refrigerant. Maintaining the desired temperature is carried out from the control unit and temperature control, which regulates the flow of the vapor-liquid mixture and stabilizes the temperature of the heaters.

Closest to the proposed technical solution to the technical essence is the heat chamber ЦЫ2. 769.020 external device connecting the ASC Source-1, containing a control unit and temperature control, controlling the operation of the electromagnetic valve for supplying liquid chladoagent from the evaporator of the vapor-liquid mixture of the refrigerant and the heater, heat chamber consisting of a heat-insulated body, collector, which is consistently in the direction of flow the medium contains a fan, an evaporator of the vapor-liquid mixture of the refrigerant (hereinafter referred to as the evaporator), a heater and nozzles, through which objects of control are blown l, the contact block in which the devices under test are placed placed in the satellites, end VJ

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tact groups and anchor mechanism of alternate fixation of the two lower control objects.

The principle of operation of the described thermal chamber, the Medium, which is sucked in by the fan from the internal volume of the thermal chamber to the collector, is cooled, the evaporator passes, and, if necessary, stabilized, the passage through the heater, and through the nozzles blows the tested devices in the contact block. Instruments placed in satellite satellites are placed in the contact block sequentially and lie on top of each other. The movement of the tested devices occurs under the action of its own weight, and the locking produces an anchor mechanism, which in turn fixes one of the two lower devices.

The disadvantage of the heat chamber of the prototype is that it can be used to inspect the instruments placed in the satellite containers, only one specific size of the satellite container height, since this height must be equal to the nozzle pitch, as well as the fact that the devices during the testing process move under their own weight, which does not guarantee their passage, without jamming.

The aim of the invention is to increase the reliability and expand the field of application of the heat chamber.

This is achieved by the fact that the heat chamber contains a collector, the mechanism of the forced tar satellites, on which the nozzles through which the control objects are blown through, are arranged with a pitch slightly larger than the size of the satellite tare of the device with the greatest dimensions. And in the contact block, the tare satellites are located with a gap between them and are fixed against the nozzles by the mechanism of the forced movement of tar satellites.

The presence of the mechanism of forced submission to the contact block of tar-satellites excludes the possibility of their jamming when moving, since increases the reliability of the heat chamber, and the location of the nozzles with a step greater than the height of the test instrument with the greatest dimensions, as well as the placement of tar-satellites in the contact block with gaps between them, makes it possible to test the entire spectrum of available instruments, i.e. extends the range of application of the heat chamber.

Fig, 1 shows a general view of the heat chamber; figure 2 - section aa in figure 1; on fig.Z - view along arrow B on the movable plate of the contact block; Fig. 4 is a view along arrow B on the copier and pusher of the mechanism for moving and fixing par satellites.

The heat chamber consists of a heat-insulated casing 1, a collector 2 with nozzles 3, a fan 4, an evaporator 5, a heater 6, a contact block 7 consisting of a movable plate 8 with a comb 9, two springs 10 and two pushers 11, a fixed plate 12, on which establishes contact groups 13 with catchers 14, copier 15 and tare-satellites 16 in which the devices under test are placed.

The copier is provided with grooves for the pushers, and the comb is equipped with protrusions for fixing the tar-satellites and form with the pushers springs, copier and drive

mechanism for the forced submission of tar satellites to the contact block.

Heat chamber works as follows.

At the beginning of the load containers satellites

16c with the tested devices contact block 7.

In the extreme left position of the movable plate 8 (see FIG. 2), the first control object 16 enters the contact device 7 and rests against the upper protrusion of the comb 9 (see FIG. Za). As the plates 8 and 12 approach each other, the catchers 14 of the upper contact group 13 enter the slots G of the satellite tare, in which

objects of control 16 are located and center the satellite container relative to the group of contact 13. With further movement of the plate 8, the bevels D of the pushers 11 are in communication with the cam 15 and the comb 9,

overcoming the action of the springs 10, moves to the right, freeing the container-satellite from fixation from the control object 16 by the upper protrusion of the comb 9. Then under the action of the pad, the comb 9 moves upwards

at the step of positioning the control objects, at the end of the movement of the comb 9, the pushers 11 fall into the grooves E of the copier 15 and under the action of the springs 10 the comb 9 moves to the left and fixes the satellite container with the object

control 16 second protrusion of the comb 9 (see Fig.36). When plates are opened, i.e. when the plate 8 is moved to the left to the extreme position (see FIG. 3A), the pusher 11 emerges from the groove E of the copier 15, and the catchers 14 from the grooves T

the container-satellite of the control object 16 Then, under the action of the drive, the comb 9 moves downwards to the step of positioning the control objects, moving the first incoming control object, which became

now the second (see fig.Za). The next control object arrives at the top of the vacated space in the contact device. Then the cycle is repeated as many times as the control objects are placed in the contact device.

As a drive of the comb 9, for example, a pneumatic cylinder or an electromagnet can be used.

After loading the contact block with tare-satellites with the tested devices, the heat chamber is ready for operation.

The medium sucked in by the fan4 from the volume bounded by the heat insulating body 1 to the manifold 2 is cooled, the passage of the evaporator 5, or heated, the passage of the heater 6, and then through the nozzles 3 blows the test devices placed in the satellite containers 16 installed in the contact block 7

Claims (2)

1. A heat chamber containing a thermally insulated housing in which a collector with nozzles for blowing test instruments, each of which is located in a tare-satellite, and a contact block with a fixed plate, on which contact groups are mounted for connecting the tested instruments, and a movable plate for loading to the contact block of tar satellites with the devices under test, as well as the mechanism for fixing tar satellites with these instruments against the corresponding nozzles, characterized in that increase the reliability and expansion of the application of the heat chamber, it is equipped with a mechanism for forcing the satellite satellites with the test devices into the contact block, and the nozzles are located with a step larger than the height of the container-satellite of the largest size of the device, and the container-satellites are located in the contact block with gaps between them. 2. A heat chamber according to claim 1, in which the force-feed mechanism to the contact block of tar-satellites is combined with the fixation mechanism and is made in the form of a comb, spring-loaded relative to the tar-satellites, and connected via pushers with a copier mounted on a fixed plate, with the comb provided with protrusions for fixing tar-satellites, and the copier with grooves for the pushers. four ,., & $ Cxj 7T F 111 I GU Jh +1 well  AND  eight Yu GU F well Jh Jh P well + i Јvd 6 lo w / d FIG. four