KR102040759B1 - Altitude Test Chamber Apparatus for Display Aerial Delivery - Google Patents

Abstract

The present invention improves high reliability in harsh environmental tests by improving the airtight structure of the chamber door that opens and closes the chamber entrance for entering and exiting the target product and the airtight structure of the motor assembly connecting the fan motor outside the chamber and the blowing fan inside the chamber. The present invention relates to an altitude test chamber device for display air transport.
The present invention includes a test chamber having an internal space for accommodating a product under test, a door assembly for opening and closing an inlet of the test chamber, and a motor assembly for driving a blower fan installed in an auxiliary chamber communicating with the test chamber. The door assembly may include an outer door frame, an inner door frame spaced apart from the outer door frame and capable of opening and closing the chamber entrance, and an elastic body having one side fixed to the outer door frame and supporting the inner door frame. It is characterized by including.

Description

Altitude Test Chamber Apparatus for Display Aerial Delivery

The present invention relates to a high-altitude test chamber device for display air transport that is applied when evaluating the reliability of a product transported by an aircraft, and more particularly, the airtight structure of the chamber door for opening and closing the chamber inlet for entering and exiting a target product and the outside of the chamber. The present invention relates to a high-altitude test chamber device for display air transport, which can secure high reliability in harsh environmental tests by improving the airtight structure of the motor assembly connecting the drive motor to the blower fan inside the chamber.

In general, air transport is used to transport high-margin products such as sensitive semiconductors and pharmaceuticals, and the products are shipped after pre-testing of product defects that may occur during air transport.

According to the prior art, as described in [Patent Document 1], after manufacturing a semiconductor or an electronic part, vacuum drying is performed by adjusting an internal temperature and a pressure of a chamber to remove bubbles or impurities attached to the surface of a product. Because of the characteristics of the drying operation in a dryer equipped with a chamber, the temperature and pressure conditions inside the chamber do not reach the severe high altitude (100,000 feet) environment. Not suitable for

The high altitude test apparatus is provided with an enclosed chamber, and evaluation parameters for the test items are obtained by changing temperature and humidity conditions in a low vacuum state in order to simulate a severe high altitude environment with a target product loaded in the chamber.

The harsh test environment in high-altitude test equipment requires high temperatures in the chamber so that the temperature inside the chamber must be -70 to 180 ° C and the chamber pressure must be able to maintain low vacuum (1 Torr). By providing components having both airtightness and heat resistance, reliability of test evaluation can be ensured. There is an urgent need for product development for test equipment suitable for such high altitude environments.

1.Registered Patent No. 10-1022740 (2011.03.09. Registered 'Vacuum and pressure reduction equipment with dual chamber structure')

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An object of the present invention is to improve the airtight structure of the chamber door for opening and closing the chamber entrance and the airtight structure of the motor assembly for driving the blower fan for display air transport that can ensure high reliability of harsh environmental test that simulates high altitude environment An altitude test chamber device is provided.

A test chamber having an inner space for accommodating a product under test according to the present invention for achieving the above object; A door assembly that opens and closes an inlet of the test chamber; And a motor assembly for driving a blower fan installed in the auxiliary chamber communicating with the test chamber, wherein the door assembly is spaced apart from the outer door frame and the outer door frame and opens and closes the chamber entrance. A door frame and an elastic body having one side fixed to the outer door frame and supporting the inner door frame, and closing the door assembly to close the test chamber inlet, the door having the inner door frame installed at the test chamber inlet; When the elastic body is contracted to move to the outer door frame while being in close contact with the packing, and when the inside of the test chamber is decompressed to form a vacuum state, the inner door frame is sucked into the chamber and adhesion to the door packing is improved. It is characterized by increasing.

The inner door frame may include a support frame, a contact plate inserted into the support frame, and a reinforcing rib interposed between the support frame and the contact plate.

The outer door frame may include one or more ball plungers installed therein, and the ball plunger may support an outer surface of the inner door frame.

The motor assembly may include a fan shaft coupled to the blower fan, a drive motor installed outside the auxiliary chamber, and a motor shaft of the drive motor and the fan shaft to rotate the fan shaft by rotational power of the drive motor. A coupling, a housing coupled to the outside of the fan shaft, interposed between the housing and the fan shaft. It includes a plurality of airtight members for preventing the inflow of outside air, the plurality of airtight members are located on the blowing fan side to prevent the inflow of the lip seal, and the energized seal located on the drive motor side to prevent the inflow of air It is characterized by including.

In addition, the fan shaft is surface-treated to prevent thermal deformation, characterized in that it comprises a bearing and an O-ring interposed between the housing and the fan shaft.

According to the present invention as described above, by improving the airtight structure of the chamber door and the airtight structure of the motor assembly, it is possible to meet the high airtightness and heat resistance required in the high altitude test environment.

In addition, according to the present invention it is possible to improve the door airtight structure with a simple installation structure that allows the inner door frame to move in the state of being inserted into the outer door frame of the door assembly using an elastic body, thereby providing an expensive sealing means It can be implemented at low cost without using the applied chamber door.

In addition, according to the present invention to prevent the inflow of outside air by applying a plurality of airtight members having different characteristics to the motor assembly in order to satisfy the test conditions for forming the inside of the chamber to low vacuum, the test conditions in a wide temperature range in a low vacuum state It can have a high airtightness and heat resistance when changing, thereby ensuring high reliability in the harsh environmental test that simulates the high altitude environment.

1 is a schematic perspective view showing the appearance of an advanced test chamber apparatus for display air transport according to the present invention.
Figure 2 is a cross-sectional view taken along line AA schematically showing the internal structure of the display high-altitude test chamber device for air transport according to the present invention.
Figure 3 is a cross-sectional view for explaining the principle of operation of the inner door frame of the door assembly according to the invention.
Figure 4 relates to a manufactured product to which the display high-altitude test chamber device for display air transport according to the present invention, a photographic image showing a state in which the test chamber is opened by opening the door assembly.
5 is a photographic image showing the installation state of the pressure adjusting device disposed on the side of the test apparatus, which relates to a manufactured product to which the display air transport altitude test chamber apparatus according to the present invention is applied.
Figure 6 relates to a manufactured product to which the display high-altitude test chamber device for air transport according to the present invention, a photographic image showing the installation state of the refrigeration device and the humidity control device arranged on the back of the test device.
Figure 7 relates to a manufactured product applying the display air transport altitude tester chamber according to the present invention, a photographic image showing an installation state of the motor assembly disposed on the upper surface of the test apparatus.
Figure 8 is a side cross-sectional view and exploded perspective view for explaining the door assembly according to the invention.
9 and 10 are cross-sectional and perspective views for explaining the coupling structure of the motor assembly according to the present invention.

Hereinafter, the present invention will be described with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements. In describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, when a part is said to "include" a certain component, this means that it may further include other components, except to exclude other components unless otherwise stated.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic perspective view showing the appearance of the display air transport altitude test chamber device according to the present invention, Figure 2 is a cross-sectional view taken along line AA schematically showing the internal structure of the display air transport altitude test chamber device according to the invention, Is a cross-sectional view for explaining the principle of operation of the inner door frame of the door assembly according to the present invention.

The display air transport altitude test chamber device 1 according to the present invention includes a main body 2 having a rectangular box shape and a door assembly 100 installed at one side of the main body 2 to enclose the entrance of the test chamber 50, the main body. (2) The main body 2 is installed on one side to reduce the internal pressure of the control panel 200, the test chamber 50, and the auxiliary chamber 52 for controlling the overall operation of the test apparatus to form a low vacuum state. It may include a pressure regulating device 300 installed in the battlefield of the side, a refrigeration apparatus 310 installed in the battlefield of the rear of the main body 2, and a motor assembly 400 installed on the upper surface of the main body (2).

In addition, as shown in FIG. 6, the display air transport altitude test chamber device 1 may include a humidity control device 320 in the battlefield behind the main body 2, and increase the internal temperature of the test chamber 50. It may include a heater (not shown) installed on the wall of the body 2 as a heating means for.

Referring to FIG. 2, the test chamber 50 forms an internal space in which a target product, for example, a semiconductor, an electronic component, or the like, which is carried through air transportation, may be loaded, and a plurality of test chambers 50 may communicate with the auxiliary chamber 52. The through hole 51 is formed. The blowing fan 410 is provided in the upper portion of the auxiliary chamber 52 to correspond to the through hole 51.

The blower fan 410 is driven to circulate air to maintain the inside of the test chamber 50 at a uniform temperature. The blowing fan 410 may be implemented as a sirocco fan.

The door assembly 100 has an outer door frame 110, an inner door frame 120 spaced apart from the outer door frame 110, and capable of opening and closing a chamber entrance, an outer door frame 110, and an inner door frame 120. ) And an elastic body 112 interposed therebetween.

As shown in (a) of FIG. 3, when the inside of the test chamber 50 moves the door assembly 100 to the chamber entrance under atmospheric pressure, the outer surface of the inner door frame 120 is in contact with the door packing 30. The elastic body 112 is contracted.

On the other hand, as shown in Figure 3 (b), when the interior of the test chamber 50 is formed in a low vacuum state, the inner door frame 120 that was closing the chamber entrance is adsorbed toward the test chamber 50, the door packing 30 The adhesion to and increases. Detailed operations of the door assembly 100 will be described later with reference to FIG. 8.

4 is related to a manufactured product to which the display air transport altitude test chamber apparatus according to the present invention is applied, and is a photographic image showing a state in which a test chamber is opened by opening a door assembly.

Referring to FIG. 4, the door assembly 100 is rotatably installed to open and close the entrance of the test chamber 50.

The test chamber 50 may form an inner space by being partitioned by a wall in which the outer frame 10 and the inner frame 20 are integrally coupled, but not shown between the outer frame 10 and the inner frame 20. The insulation can be buried to block the influence from the external environment.

The test chamber 50 may load the product under test by opening the chamber inlet, and may further install a shelf for multi-layer loading. A through hole 51 communicating with the auxiliary chamber 52 is formed at the back of the test chamber 50. When the blower fan 410 is driven by the driving motor 420, air circulation occurs between the auxiliary chamber 52 and the test chamber 50, so that the internal temperature of the chamber may be maintained uniformly.

On the outer edge of the chamber inlet, a square strip-shaped door packing 30 slightly protruding outward is fixedly installed. The contact plate 123 of the door assembly 100 is in close contact with the door packing 30, and the surface of the contact plate 123 formed of a plate-shaped metal material may be in surface contact to completely block the inflow of outside air. The door packing 30 may be implemented as a silicon packing having excellent wear resistance and heat resistance.

5 and 6, the pressure control device 300 for adjusting the pressure in the chamber by using a vacuum pump is installed in the electric chamber of the side of the main body (2). In addition, the electric compartment in the rear of the main body 2 is provided with a refrigeration apparatus 310 and a humidity control device 320 for adjusting the temperature and humidity inside the chamber, respectively. Each pipe connected to the pressure regulating device 300, the freezing device 310, and the humidity adjusting device 320 is installed through a wall of the auxiliary chamber 52, and the pressure and temperature of the auxiliary chamber 52 and Humidity is controlled. When the blowing fan 410 installed in the auxiliary chamber 52 undergoes an air circulation process, the auxiliary chamber 52 and the test chamber 50 may create a uniform test environment.

On the other hand, the test conditions for conducting a high altitude environmental test is the chamber internal temperature is -70 ~ 180 ℃ and the internal pressure of the chamber to form a low vacuum (1 Torr), the motor coil when exposed to the high temperature environment motor coil Since there is a problem in that an operation defect occurs due to deterioration of the driving motor 420 of the motor assembly 400 as shown in Figure 7 is installed outside the main body 2 using the motor bracket 440.

Very high airtightness and heat resistance are required to create a harsh test environment for sensitive products such as sensitive semiconductors and pharmaceuticals that are carried by air transportation, and confidentiality that can strictly block outflow of air to maintain a low vacuum state. Rescue is required. In particular, the airtightness to be prepared for the inflow of the outside air through the gap between the chamber inlet and the connection of the drive motor 420 and the blowing fan 410 should be secured.

The door assembly 100 and the motor assembly 400 according to the present invention for satisfying the airtightness required during the test to simulate the high altitude environment will be described in detail.

8 (a) is a side cross-sectional view of the door assembly 100, and FIG. 8 (b) is an exploded perspective view of the door assembly 100. A recess having a predetermined depth is formed inside the outer door frame 110 of the door assembly 100, and the inner door frame 120 elastically supported by the elastic body 112 is accommodated in the recess. The inner door frame 120 is press-fitted inside the outer door frame 110, and the ball plunger 111 is provided because a plurality of ball plungers 111 are provided at the groove edge of the outer door frame 110. The outer surface of the inner door frame 120 is supported in close contact. When a pressing force of a predetermined size or more acts on the inner door frame 120, the inner body moves to the outer door frame 110, and the elastic body 112 is contracted accordingly. On the contrary, when the suction force acts on the inner door frame 120, the outer door frame 110 moves outward, and the elastic body 112 extends.

The inner door frame 120 is integrally coupled with the support frame 121 and the support frame 121 of a rectangular frame shape to be received at the inner edge of the outer door frame 110, and a contact plate 123 and a square strip which are formed in a plate shape. It may include an inner door cover 122 shaped. The inner door cover 122 may cover the boundary between the support frame 121 and the contact plate 123 and may be fixed to the support frame 121 by using a fastening means such as a bolt. The inner surface of the door assembly 100, which may be coupled to the chamber entrance by finishing with the inner door cover 122, is flat, and the inner door frame 120 is stably received inside the outer door frame 110.

A reinforcing rib 124 formed in a lattice shape may be installed on one side of the contact plate 123 of the inner door frame 120. This is because when the contact plate 123 is in close contact with the door packing 30, as shown in FIG. 3 (b), when the inside of the test chamber 50 is formed in a low vacuum state, the inner door frame 120 is connected to the test chamber. This is to prevent the phenomenon that the bending deformation occurs in the process of being adsorbed toward (50).

Referring to FIG. 9, the motor assembly 400 installs a driving motor 420 on the upper surface of the main body 2 using the motor bracket 440, and is installed in the driving motor 420 and the auxiliary chamber 52. It may include a component for connecting the blowing fan 410. As illustrated, the motor assembly 400 includes a fan shaft 411 coupled to the blowing fan 410 and a motor shaft of the drive motor 420 to rotate the fan shaft 411 by the rotational power of the drive motor 420. A coupling 421 coupling the 420a and the fan shaft 411, a housing 430 coupled to the outside of the fan shaft 411, and interposed between the housing 430 and the fan shaft 411. A plurality of airtight members 433 and 434, bearings 431, 432 and the O-ring 435 to prevent the inflow of outside air.

Since the fan shaft 411 provided in the auxiliary chamber 52 is partially exposed to a high temperature environment, the fan shaft 411 is surface heat treated to prevent thermal deformation.

The plurality of hermetic members may include a lip seal 433 positioned at the side of the blowing fan 410 to prevent inflow of outside air, and an energized seal 434 positioned at the side of the drive motor 420 to prevent outside air from entering. .

Energized seal 434 is made of Teflon and stainless spring material has a high wear resistance and heat resistance and excellent sealing force. Energized seal 434 is installed on the outside of the fan shaft 411 and in particular positioned on the drive motor 420 serves to block the inflow of outside air.

In addition, the lip seal 433 is made of Teflon material can be used in a high pressure and high temperature environment, and serves to block the inflow of outside air so that the pressure inside the auxiliary chamber 52 in which the blowing fan 410 is located in a low vacuum state. do.

In this way, the plurality of airtight members 433 and 434 are provided on the fan shaft 411 to suppress the high temperature atmosphere from being transmitted to the drive motor 420 while maintaining the airtightness.

As described above, according to the present invention, the airtight structure of the chamber door and the airtight structure of the motor assembly may be improved to satisfy the high airtightness and heat resistance required in a high altitude test environment.

In addition, the present invention can improve the door airtight structure with a simple installation structure using an elastic body can be implemented at low cost without using a chamber door to which expensive sealing means is applied.

In addition, according to the present invention, in order to satisfy the test conditions for forming the inside of the chamber at low vacuum, a plurality of airtight members having different characteristics are applied to the motor assembly to prevent the inflow of outside air, and a wide temperature in the low vacuum (1 Torr) state. It can have high airtightness and heat resistance when changing test conditions in the range (-70 ~ 180 ℃).

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art using the basic concepts of the present invention defined in the following claims are provided. It belongs to the scope of the present invention.

1: Altitude test chamber device for display air transport 10: Outer frame
20: inner frame 30: door packing
50: test chamber 52: auxiliary chamber
100: door assembly 110: outer door frame
111 ball plunger 112 elastic body
120: inner door frame 121: support frame
122: inner door cover 123: contact plate
200: control panel 300: pressure regulator
310: freezing device 320: humidity control device
400: motor assembly 410: blowing fan
411 shaft 420 drive motor
421: Coupling 422: Flange
430: shaft housings 431, 432: bearing
433: first sealing member 434: second sealing member
435: O-ring 440: motor bracket

Claims (5)

An air test altitude test chamber device that simulates a high altitude environment,
A test chamber defining an inner space for accommodating a test object product and having a door packing fixed to an outer edge of the inlet;
A door assembly that opens and closes an inlet of the test chamber; And
And a motor assembly for driving a blowing fan installed inside the auxiliary chamber in communication with the test chamber.
The door assembly includes an outer door frame, an inner door frame spaced apart from the outer door frame and capable of opening and closing the chamber entrance, and an elastic body having one side fixed to the outer door frame and supporting the inner door frame. But
The outer door frame is provided with a recess for receiving the inner door frame,
The inner door frame includes a support frame accommodated in the inner groove of the outer door frame, a contact plate inserted into the support frame, and a reinforcing rib interposed between the support frame and the contact plate,
When the door assembly is closed to close the test chamber inlet, the inner door frame moves toward the outer door frame in close contact with the door packing installed at the test chamber inlet, and the elastic body contracts to move the inner door frame. Elastic support,
When the inside of the test chamber is closed to depressurize the test chamber to form a vacuum state, the inner door frame is sucked toward the inside of the chamber, and the elastic body extends to increase the adhesion to the door packing. Elastic support,
The motor assembly may include a fan shaft coupled to the blower fan, a drive motor installed outside the auxiliary chamber, and a motor shaft of the drive motor and the fan shaft to rotate the fan shaft by rotational power of the drive motor. A coupling, a housing coupled to the outside of the fan shaft, and a plurality of airtight members interposed between the housing and the fan shaft to prevent inflow of external air,
The plurality of hermetic members are lip seals positioned on the blowing fan side to prevent the inflow of outside air, and an energized seal positioned on the drive motor side to prevent the inflow of outside air. .
delete The method of claim 1,
The outer door frame has one or more ball plungers installed therein, and the ball plunger supports an outer surface of the inner door frame.
delete The method of claim 1,
The fan shaft is surface heat treated to prevent thermal deformation,
And a bearing and an o-ring interposed between the housing and the fan shaft.

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