Cooling system for computer

• US 5,731,954 A
• Filed: 08/22/1996
• Issued: 03/24/1998
• Est. Priority Date: 08/22/1996
• Status: Expired due to Term

• Current Assignee: Kioan Cheon
• Original Assignee: Kioan Cheon
• Inventors: Cheon, Kioan
• Primary Examiner(s): Thompson, Gregory D.
• Application Number:
  US08/701,346
• Time in Patent Office: 579 Days
• Field of Search: 62/259.2, 165/80.2, 165/80.4, 165/122, 165/137, 165/104.33, 174/15.1, 174/16.1, 257/707, 257/712-714, 361/687, 361/689, 361/695-697, 361/698-699, 361/701-704, 361/707, 361/715, 454/184
• US Class Current: 361/699
• CPC Class Codes: F25B 21/02 using Peltier effect; using Nernst-Ettinghausen effect
• CPC Class Codes: G06F 1/20 Cooling means
• CPC Class Codes: G06F 2200/201 Cooling arrangements using cooling fluid
• CPC Class Codes: H05K 7/20009 using a gaseous coolant in electronic enclosures in cabinets of standardized dimensions H05K7/20536; in server cabinets H05K7/20709; in vehicle electronic casings H05K7/20845; in power control electronics H05K7/2089; in displays H05K7/20954

Abstract

A cooling system for a small computer has one or more heat transfer devices (12, 30) in intimate, heat-exchanging contact with heat-producing computer components. Liquid coolant is circulated through conduits from a reservoir (48) to the devices (12, 30). A radiator (42) is mounted on the outside of the computer housing (7) and is in heat-exchanging contact with the reservoir (48). The contact is preferably provided by a Peltier effect cooling module (46). A pump (P) is positioned in the reservoir casing (50) to pump the coolant. A brushless electric motor is mounted on the casing (50) to power the pump (P). The reservoir (48) has an upstream portion (58) and a downstream portion (60). Coolant is directed through the upstream portion (58) past heat-gathering fins (64) and into the downstream portion (60).

Claims

1. A cooling system for a computer having a housing and at least one heat-producing component mounted inside the housing, comprising:

a heat transfer device having an outer surface in intimate contact with a complementary outer surface of the component, and an internal passageway extending between an inlet port and an outlet port;

a radiator mounted on the outside of the housing and having a plurality of heat transfer fins exposed to ambient air outside the housing;

a reservoir in heat exchanging contact with the radiator and extending into the housing, said reservoir having a casing, an inlet opening in the casing, and an outlet opening in the casing spaced from the inlet opening;

a first conduit extending between the outlet port of said heat transfer device and the inlet opening of the reservoir;

a second conduit extending between the outlet opening of the reservoir and the inlet port of said heat transfer device;

a pump positioned in the casing of the reservoir adjacent to the outlet opening to pump liquid coolant from the reservoir out through the outlet opening and to said heat transfer device through the second conduit; and

a brushless electric motor mounted on the casing to power the pump.

2. The cooling system of claim 1, in which the reservoir is in heat exchanging contact with the radiator via a Peltier effect cooling module positioned between and in intimate contact with the reservoir and the radiator.

3. The cooling system of claim 2, in which the casing of the reservoir defines an interior space;

and the reservoir includes an internal divider wall substantially separating the interior space into an upstream portion in communication with the inlet opening and a downstream portion in communication with the outlet opening, and a plurality of heat-gathering fins in the upstream portion;

said divider wall having a passage therethrough communicating the upstream portion and the downstream portion and positioned so that liquid coolant entering the interior space of the reservoir through the inlet opening passes through the upstream portion by and through the heat-gathering fins and then flows through the passage into the downstream portion and out the outlet opening.

4. The cooling system of claim 1, in which the casing of the reservoir defines an interior space;

and the reservoir includes an internal divider wall substantially separating the interior space into an upstream portion in communication with the inlet opening and a downstream portion in communication with the outlet opening, and a plurality of heat-gathering fins in the upstream portion;

said divider wall having a passage therethrough communicating the upstream portion and the downstream portion and positioned so that liquid coolant entering the interior space of the reservoir through the inlet opening passes through the upstream portion by and through the heat-gathering fins and then flows through the passage into the downstream portion and out the outlet opening.

5. The cooling system of claim 1, in which the computer has a second heat-producing component;

the system comprises a second heat transfer device having an outer surface in intimate contact with a complementary outer surface of the second component, and an internal passageway extending between an inlet port and an outlet port; and

one of said conduits includes the internal passageway in said second heat transfer device.

6. The cooling system of claim 5, in which said components include a microprocessor and a power supply component, respectively.

7. The cooling system of claim 6, in which said power supply component comprises a heat sink and a plurality of rectifiers mounted on and in heat transfer contact with the heat sink, said second heat transfer device being in intimate contact with the heat sink.

8. The cooling system of claim 1, in which the motor is mounted inside the casing.

9. The cooling system of claim 8, in which the casing includes an inner cage, and the motor includes a stator coil and core portion positioned inside the cage to isolate the stator coil and core portion from liquid coolant in the reservoir.

10. The cooling system of claim 1, in which the motor includes a magnet mounted inside the casing and a coil mounted outside the casing to isolate the coil from liquid coolant in the reservoir.

11. The cooling system of claim 10, comprising a mounting plate secured to an outside surface of the casing and having a mounting surface confronting said outside surface, said coil being secured to said mounting surface.