Backflow prevention device and server system using the same

Patent metadata

Field	Value
Publication number	US-10779434-B2
Application number	US-201815979461-A
Country	US
Kind code	B2
Filing date	May 15, 2018
Priority date	Feb 14, 2018
Publication date	Sep 15, 2020
Grant date	Sep 15, 2020

Abstract

A backflow prevention device includes at least one channeled body and at least one moving part. The at least one channeled body includes at least one first opening and at least one second opening. Each of the at least one channeled body gradually enlarges from each of the at least one first opening to each of the at least one second opening. Each of the at least one moving part is movably disposed in each of the at least one channeled body. A size of the moving part is less than a size of the second opening. When an airflow back flows from the second opening to the first opening, the airflow drives the moving part to enable the moving part to block the first opening. A server system is also disclosed.

First claim

What is claimed is:

1. A backflow prevention device adapted to an electronic device, comprising:
at least one channeled body, each of the at least one channeled body comprising:
at least one first opening; and
at least one second opening, wherein each of the at least one channeled body gradually enlarges from the at least one first opening to the at least one second opening; and

at least one moving part, each of the at least one moving part being movably disposed in each of the at least one channeled body, a size of the at least one moving part being greater than a size of the at least one first opening, the size of the at least one moving part being less than a size of the at least one second opening,
an airflow from the electronic device driving each of the at least one moving part to enable each of the at least one moving part to block each of the at least one first opening when the airflow back flows from each of the at least one second opening to each of the at least one first opening of the at least one channeled body.

2. The backflow prevention device as claimed in claim 1 , wherein the at least one channeled body further comprises:
at least one third opening, each of the at least one first opening being located between each of the at least one second opening and each of the at least one third opening, and each of the at least one channeled body gradually shrinking from each of the at least one third opening to each of the at least one first opening.

3. The backflow prevention device as claimed in claim 2 , wherein a diameter of each of the at least one second opening or each of the at least one third opening is R 1 , a diameter of each of the at least one first opening is R 2 , and 0.4R 1 ≤R 2 ≤0.6R 1 .

4. The backflow prevention device as claimed in claim 2 , wherein a slope of the at least one channeled body from each of the at least one second opening to each of the at least one first opening or from each of the at least one third opening to each of the at least one first opening is between 0.7 and 1.43.

5. The backflow prevention device as claimed in claim 1 , further comprising:
at least one supporting piece, each of the at least one channeled body having at least one first channel, each of the at least one first channel being connected to the corresponding at least one first opening and the corresponding at least one second opening, each of the at least one supporting piece being disposed in the corresponding at least one first channel, each of the at least one supporting piece surrounding a second channel, the second channel corresponding to the at least one first opening and extending towards the at least one second opening and being coaxial with the corresponding at least one first opening, a plurality of through holes being formed on each of the at least one supporting piece, the through holes enabling the second channel of each of the at least one supporting piece to be connected to the corresponding at least one first channel, and each of the at least one moving part being movably disposed in the corresponding second channel.

6. The backflow prevention device as claimed in claim 1 , further comprising:
at least one stopper, disposed on the at least one channeled body and located next to the at least one second opening, each of the at least one stopper comprising a ventilator, and the at least one moving part being adapted to be restrained by the at least one stopper and that being not detached from the at least one channeled body from the at least one second opening.

7. The backflow prevention device as claimed in claim 1 , wherein each of the at least one moving part is a sphere, a cone, or a disk.

8. The backflow prevention device as claimed in claim 1 , further comprising:
a frame, comprising a plurality of accommodating slots, the at least one channeled body comprising a plurality of channeled bodies, the at least one moving part comprising a plurality of moving parts, each of the plurality of moving parts correspondingly disposed in each of the plurality of channeled bodies, and each of the channeled bodies and the correspondingly moving parts are being replaceably inserted into one of the plurality of accommodating slots,
wherein, a number of the accommodating slots is greater than a number of the channeled bodies.

9. The backflow prevention device as claimed in claim 8 , wherein the accommodating slots comprise a first accommodating slot and a second accommodating slot, a size of the first accommodating slot is greater than a size of the second accommodating slot, the channeled bodies comprise a first channeled body and a second channeled body, and a size of the first channeled body is greater than a size of the second channeled body.

10. The backflow prevention device as claimed in claim 1 , wherein a main body of the at least one channeled body is one channeled body, the at least one channeled body further comprises at least one third opening, the at least one first opening is located between the at least one second opening and the at least one third opening, the at least one first opening, the at least one second opening, and the at least one third opening respectively comprise a plurality of first openings, a plurality of second openings, and a plurality of third openings, and the first openings, the second openings, and the third openings are formed on the at least one channeled body.

11. A server system, comprising:
a housing;
a flow inlet, disposed in the housing;
a main board, disposed in the housing;
a fan, disposed in the housing near the flow inlet, the fan comprising an outflow side, the main board being located next to the outflow side; and
a backflow prevention device as claimed in claim 1 , disposed in the housing and disposed at the outflow side of the fan.

12. The server system as claimed in claim 11 , wherein the at least one channeled body of the backflow prevention device further comprises:
at least one third opening, each of the at least one first opening being located between each of the at least one second opening and each of the at least one third opening, and each of the at least one channeled body gradually shrinking from each of the at least one third opening to each of the at least one first opening.

13. The server system as claimed in claim 12 , wherein a diameter of each of the at least one second opening or each of the at least one third opening is R 1 , a diameter of each of the at least one first opening is R 2 , and 0.4R 1 ≤R 2 ≤0.6R 1 .

14. The server system as claimed in claim 12 , wherein a slope of the at least one channeled body from each of the at least one second opening to each of the at least one first opening or from each of the at least one third opening to each of the at least one first opening is between 0.7 and 1.43.

15. The server system as claimed in claim 11 , further comprising:
at least one supporting piece, each of the at least one channeled body having at least one first channel, each of the at least one first channel being connected to the corresponding at least one first opening and the corresponding at least one second opening, each of the at least one supporting piece being disposed in the corresponding at least one first channel, each of the at least one supporting piece surrounding a second channel, the second channel corresponding to the at least one first opening and extending towards the at least one second opening and being coaxial with the corresponding at least one first opening, a plurality of through holes being formed on each of the at least one supporting piece, the through holes enabling the second channel o

Assignees

• Wistron Corp

Inventors

• Chang Tsung-Han
• Chen Hua

Classifications

• H05K7/20145 Primary

  Means for directing air flow, e.g. ducts, deflectors, plenum or guides · CPC title

• F04D29/403

  especially adapted for elastic fluid pumps · CPC title

• F04D25/08

  the working fluid being air, e.g. for ventilation · CPC title

• F04D27/00

  Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids · CPC title

• G06F1/20

  Cooling means · CPC title