Filter

• US 8,944,256 B2
• Filed: 07/28/2009
• Issued: 02/03/2015
• Est. Priority Date: 07/30/2008
• Status: Active Grant

• Current Assignee: Shenzhen Mindray Bio-Medical Electronics Co., Ltd. (Excelsior Union Ltd.)
• Original Assignee: Shenzhen Mindray Bio-Medical Electronics Co., Ltd. (Excelsior Union Ltd.)
• Inventors: Peng, Zhang, Xueyuan, Shi, Zaixing, Gao, Zhi, Xu
• Primary Examiner(s): ZALASKY, KATHERINE M
• Application Number:
  US12/510,944
• Publication Number:
  US 20100025321A1
• Time in Patent Office: 2,016 Days
• Field of Search: None
• US Class Current: 210/457
• CPC Class Codes: B01D 19/0042 modifying the liquid flow B01D19/0021 takes precedence
• CPC Class Codes: B01D 2201/043 Filter tubes connected to plates
• CPC Class Codes: B01D 2201/0453 positioned between at least two plates
• CPC Class Codes: B01D 2201/46 Several filtrate discharge conduits each connected to one filter element or group of filter elements
• CPC Class Codes: B01D 29/114 arranged for inward flow filtration B01D29/15, B01D29/33 take precedence
• CPC Class Codes: B01L 3/502723 characterised by venting arrangements
• CPC Class Codes: G01N 1/10 in the liquid or fluent state burettes, pipettes B01L3/02; sampling of ground water E02D1/06; metering by volume of fluids or fluent solid material G01F11/00, G01F13/00

Abstract

Disclosed is filter having a filter core, a top cover, a bottom cover, at least one first discharging pipe and at least one second discharging pipe, wherein the filter core has a slot through which a fluid to be filtered passes; the top cover and the bottom cover are respectively fixed to an upper portion and a lower portion of the filter core; an inner wall surface of the filter core, an inner wall surface of the top cover and an inner wall surface of the bottom cover define a filter cavity; the first discharging pipe has at least one first inlet through which the fluid flows in; the second discharging pipe has at least one second inlet through which the fluid flows in; and all the first inlets are situated above the second inlets in the gravity direction. The filter can realize the separation of two fluids.

Claims

1. A filter for filtering fluids, comprising:

a filter core, wherein the filter core of the filter has a filter element through which a fluid to be filtered passes to become filtered fluid;

a top cover and a bottom cover, in which the top cover and the bottom cover are respectively fixed to an upper portion and a lower portion of the filter core;

an inner wall surface of the filter core, an inner wall surface of the top cover, and an inner wall surface of the bottom cover that define a filter cavity that houses the filtered fluid, wherein the filter element has a filtration flow rate entering into the filter cavity;

a first discharging pipe provided at the top cover and connected to a first discharge pumping device configured to apply negative pressure to the filter cavity, the first discharging pipe at least partially disposed within the filter cavity to form a first passageway to discharge at least a first part of the fluid from the filter cavity, wherein the first discharging pipe has a first inlet through which the fluid flows into the first discharging pipe from the filter cavity;

a second discharging pipe provided at the top cover and connected to a second discharge pumping device configured to apply negative pressure to the filter cavity, the second discharging pipe at least partially disposed within the filter cavity to form a second passageway to discharge at least a second part of the fluid from the filter cavity, wherein the second discharging pipe has a second inlet through which the fluid flows into the second discharging pipe from the filter cavity, and wherein the first inlet and the second inlet are situated on different planes in a first direction.

2. The filter according to claim 1, wherein the second discharging pipe extends downwards into the filter cavity, and the second inlet of the second discharging pipe is adjacent to the inner wall surface of the bottom cover.

3. The filter according to claim 1, wherein the second discharging pipe extends downwards into the filter cavity, and the first inlet of the first discharging pipe does not extend beyond the inner wall surface of the top cover.

4. The filter according to claim 1, wherein the second inlet of the second discharging pipe is provided at the bottom cover.

5. The filter according to claim 4, wherein the second inlet of the second discharging pipe provided at the bottom cover is not higher than the inner surface of the bottom cover.

6. The filter according to claim 4, wherein the second inlet of the second discharging pipe is adjacent to the inner wall surface of the bottom cover.

7. The filter according to claim 1, wherein the first discharging pipe nests at least a portion of the second discharging pipe.

8. The filter according to claim 1, wherein the first inlet of the first discharging pipe is situated on a first plane that is flush with at least a part of the inner wall surface of the top cover, and the second discharging pipe extends downwards into the filter cavity.

9. The filter according to claim 1, wherein the bottom cover and the top cover are configured to ensure a center of gravity of the filter is in the lower part of the filter.

10. The filter of claim 1, wherein the first discharging pipe and the second discharging pipe are to discharge the fluid that passes through the filter core and comprises a gas-liquid mixture or a mixture of two or more liquids with different densities.

11. The filter of claim 10, in which:

the first discharging pipe is positioned to discharge the gas-liquid mixture with a first gas-to-liquid ratio,

the second discharging pipe is positioned to discharge the gas-liquid mixture with a first gas-to-liquid ratio, and

the first gas-to-liquid ratio is different from the second gas-to-liquid ratio.

12. The filter of claim 1, wherein the second inlet of the second discharging pipe is closer to the inner wall of the bottom cover than the first inlet of the first discharging pipe is.

13. The filter of claim 1, in which the second inlet is positioned proximate the inner wall surface of the bottom cover.

14. The filter of claim 13, in which the one or more flow rate requirements comprises at least one requirement for a flow rate of the filter core, a flow rate of the first discharging pipe, or a flow rate of the second discharging pipe.