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FLOW SENSOR ARRANGEMENT

IP.com Disclosure Number: IPCOM000201763D
Publication Date: 2010-Nov-22
Document File: 4 page(s) / 249K

Publishing Venue

The IP.com Prior Art Database

Abstract

There is disclosed a flow sensor arrangement, comprising a main channel (1) for conveying a fluid, a bypass (2) connected to the main channel (1) for conveying a portion of the fluid supplied in the main channel (1), and a flow sensor (6) for measuring a flow of the fluid portion in the bypass (2). The bypass (2) branches off from the main channel (1) at an angle (α) of less than 90 degrees between an inlet section (21) of the bypass (2) and a supply section (11) of the main channel (1). By such design means, particles can be prevented from entering the bypass (2) by this adversely affecting the measurements.

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FLOW SENSOR ARRANGEMENT

Abstract

There is disclosed a flow sensor arrangement, comprising a main channel (1) for conveying a fluid, a bypass (2) connected to the main channel (1) for conveying a portion of the fluid supplied in the main channel (1), and a flow sensor (6) for measuring a flow of the fluid portion in the bypass (2). The bypass (2) branches off from the main channel (1) at an angle (α) of less than 90 degrees between an inlet section
(21) of the bypass (2) and a supply section (11) of the main channel (1). By such design means, particles can be prevented from entering the bypass (2) by this adversely affecting the measurements.

Technical Field

The present disclosure refers to a flow sensor arrangement and in particular to a flow sensor arrangement comprising a bypass .

Background Art

Flow sensors may be used for measuring flows of any fluid such as liquids or gases. Such flow sensors may not be arranged directly in a main channel which main channel conveys the bulk of the fluid. Instead, the flow sensor may be arranged in a bypass bypassing the main channel into which bypass a portion of the fluid is diverted from the main channel. As a result, the flow sensor measures the flow of such portion of fluid in the bypass. The flow in the bypass in turn is a measure of the flow in the main channel which flow in the main channel can be derived by suitable conversion factors from the flow in the bypass. The arrangement of the flow sensor in the bypass may be owed to a better accessibility, e.g. for taking readings from the flow sensor, or for repair and/or exchange purposes, or to a better resolution in the measurement. For the reason that the bypass is designed to only accept a small portion of the overall fluid conveyed in the main channel, the bypass dimensions are small compared to the dimensions of the main channel. Hence, the bypass generally is more susceptible to con, tamination. Such contamination may include particles contained in the fluid as conveyed in the main channel which may enter the bypass. Such particles may either become stuck in the bypass and, therefore, increase the flow resistance in the bypass or adversely impact the flow sensor itself. Both alternatives lead to incorrect measurement results which do not represent the real flow in the bypass and the main chan, nel respectively.

Summary of the Invention

The problem to be solved by the present invention is therefore to provide a flow sensor arrangement in which particles are hampered from entering a bypass of the flow sensor arrangement.This problem is solved by a flow sensor arrangement according to the features of claim 1. In such flow sensor arrangement, a bypass is connected to a main channel for conveying a portion of the fluid supplied via the main channel. A flow sensor is arranged for measuring a flow in the bypass. The bypass branches off from the main channel at an angle of less than 90 degrees between an inlet section of the bypass and a...