Arrangement in one or more units disposed in an outer unit

• US 4,797,782 A
• Filed: 05/20/1987
• Issued: 01/10/1989
• Est. Priority Date: 10/03/1985
• Status: Expired due to Fees

• Current Assignee: Aktiebolaget Bofors
• Original Assignee: Aktiebolaget Bofors
• Inventors: Wistling, Roger
• Primary Examiner(s): TOLIN, GERALD P
• Application Number:
  US07/054,178
• Time in Patent Office: 601 Days
• Field of Search: 174/16 R, 174/35 R, 174/35 MS, 62/418, 165/104.33, 165/104.34, 361/393-395, 361/382-385, 361/415, 361/424
• US Class Current: 361/694
• CPC Class Codes: H05K 7/206 Air circulating in closed loop within cabinets wherein heat is removed through air-to-air heat-exchanger

Abstract

A portable, low-weighted outer unit defines substantially asceptic space in which inner units are disposed. Each respective inner unit encloses electronic components which are placed on assembly boards stacked upright in the inner units. A fan is provided to effect the circulation of the air in the space and past the inner units. Another fan is provided for drawing the outside air through the heat exchanger and through the outer unit. The heat transported from the electronic components by the flow of the inner air is transferred to the outer air whereby the temperature of the inner air inside the outer unit is kept reduced.

Claims

1. An apparatus comprising:

a portable, low-weighted outer unit defining an inner, dust-free aseptic space housing optical components and heat generating electronic components;

inner units provided in said space and disposed along one inner wall of said outer unit to form a channel having an inlet and outlet positioned close to two opposite inner walls of said outer unit;

at least one, first inner unit encasing said electronic components which are disposed on assembly boards stacked in said first unit;

a second inner unit including a cooler provided with an air heat exchanger;

a first circulation means for circulation of inner air in said space and through said inlet of said channel past said electronic components, said heat exchanger of said cooler unit;

said outlet of said channel, said optical components in said space and back to said inlet of said channel;

a second circulation means for drawing in outer air through said heat exchanger and out through an exhaust outlet in said outer unit;

wherein said heat transported from said electronic components by said inner air flow is transferred to said outer air flow whereby the temperature of said inner air in said space is kept reduced.

2. The apparatus according to claim 1 wherein said cooler unit is assembled in series with one of said inner units;

each respective inner unit being provided on an air-intake side, with a filter which is permeable to said inner air flow but is operative as a barrier to electromagnetic interference (EMI).

3. The apparatus according to claim 1, wherein two or more inner units interconnected in a subsequent row are separated by filters permeable to said inner air flow but operative against electromagnetic impulses;

and wherein a filter is provided at the free end of the outermost-located inner unit.

4. The apparatus according to claim 3 wherein the assembly boards are disposed on frames which each carry two boards disposed substantially in parallel on either side of said frame, said frames being disposed so as to allow said inner air to pass on both sides of each board.

5. The apparatus according to claim 4 wherein each frame carries two substantially parallel outer sections and a central portion disposed there between and substantially parallel to said outer sections, said sections being interconnected with cross-pieces extending between said outer and central sections, said crosspieces having reduced dimensions allowing said inner air to pass on either side of boards fixedly retained on said frames.

6. The apparatus according to claim 5 wherein each respective inner unit is provided with a connection device for outer electric connections of electronic components.

7. The apparatus according to claim 6 wherein each respective inner unit provides the disturbance-suppressed against EMI enclosure for its associated electronic equipment and the connection thereof and at the same time efficient cooling of the electronic components.

8. The apparatus according to claim 7 wherein each respective inner unit with associated electronic connections is made of metal/alloy;

the electric connection being made by metal-screened connection conduits which are led into each respective inner units by metal connection sleeves.

9. The apparatus according to claim 8 wherein said inner unit is being provided with electrical leads which are mechanically sealed against the material constituting the bottom portion to provide the disturbance-guarded enclosure for electronic components;

said electronically it is being mutually electrically interconnected on the outside of each respective inner unit.

10. The apparatus according to claim 6 wherein respective inner units with associated electric connection devices are made of metal alloy.