Pumps – Motor driven – Including manual – mechanical – or diverse drive
Patent
1996-08-15
1998-06-02
Freay, Charles G.
Pumps
Motor driven
Including manual, mechanical, or diverse drive
417359, 4174235, 165 803, 622592, 415 61, F04B 914, F04B 3504
Patent
active
057590168
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
The invention discloses a device for continuously cooling apparatuses with at least one circulation means to circulate a coolant, wherein the circulation means has at least one drive means and at least one distribution means driven by at least one drive means to distribute the coolant.
Cooling devices are used in many applications and their importance has grown in recent years with the increasing heat sensitivity of the components to be cooled. Today fan systems with several fans are the state of the art. In the event of failure of a fan an attempt is made to guide the air flow by means of flaps so that adequate cooling can be achieved. However, since in the event of failure of a fan the pre-calculated and optimized spatial air flow changes, the flow conditions inevitably change as well, and so the cooling of components also changes. This can lead to overheating and resultant defects, and to premature aging of the components or even to a shutdown of the complete system.
DE-A-2 503 623 discloses an aeration device for an electrical switch cabinet, in which at least two ventilator fans are provided for the switch cabinet. The ventilator fans are arranged axially immediately behind each other, with an electromagnetic locking device provided on at least one of the fans, by means of which the fan concerned is blocked while the other fan is in operation, and is automatically released in the event of failure of the other fan.
The object of the invention is to create a device for continuously cooling devices by substantially maintaining the flow conditions of the coolant in the apparatus in the event of failure of a circulation means.
The object of the invention is furthermore to minimize and to evenly distribute the motive power of the remaining circulation means in the event of failure of one or more circulation means.
The object is achieved in accordance with the invention by using at least one auxiliary means coupled to the at least one distribution means, wherein, in the event of failure of a drive means, the at least one auxiliary means is coupled to the distribution means in question and maintains the functioning of the distribution means.
The science of the invention relates primarily to the ventilation of gaseous coolants, but is not restricted to them. It can also be applied for circulation devices with liquids.
Further advantageous embodiments of the invention are set out in the dependent claims.
The subject matter which is regarded as the invention is particularly pointed out and distinctly claimed in the concluding portion of the specification. The invention, however, both as to organization and method of practice, together with the further objects and advantages thereof, may best be understood by reference to the following description taken in connection with the accompanying drawings in which:
FIG. 1a shows the construction of a cooling device according to the state of the art for cooling a multiplicity of electronic plug-in boards, such as occur in data processing systems;
FIG. 1b shows a sectional view of the flow characteristic in the arrangement from FIG. 1a;
FIG. 2 shows the measured distribution of flow velocities in a system based on FIG. 1a according to the state of the art;
FIG. 3 shows an embodiment of the invention which allows reliable cooling of the cooling device from FIG. 1a also in the event of failure of one of the fans;
FIG. 4 shows an expanded cooling device with four fans, each rotating in the same direction;
FIG. 5 shows a sectional view of the construction of a fan with redundant bearing;
FIG. 6 shows the construction of the cooling device based on FIG. 3 with a control unit.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
FIG. 1a shows the construction of a cooling device 10 for cooling a multiplicity of electronic plug-in boards 12 and 13, as occur in data processing systems. The cooling device 10 contains a first fan 14 and a second fan 16 for ventilation of the air in the cooling device 10.
FIG. 1b then shows a sectional view of the flow characteristic in
REFERENCES:
patent: 2936107 (1960-05-01), Blackburn
patent: 4398872 (1983-08-01), Fleenor et al.
patent: 4697991 (1987-10-01), Tsukahara et al.
patent: 4756473 (1988-07-01), Takemae et al.
patent: 5035585 (1991-07-01), Berges et al.
Miller et al., `Dual Motor Air Moving Device`, IBM Technical Disclosure Bulletin, vol. 37, No. 05, May 1994, p. 373.
Batchelor et al., `Management of a Redundant Cooling System`, IBM Technical Disclosure Bulletin, vol. 37, No. 06A, Jun. 1994, p. 257.
Bernhardt Hermann
Notter Frank
Cutter Lawrence D.
Freay Charles G.
International Business Machines - Corporation
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