Patent ID: 9003877
Filing Date: 2015-04-14
Classification: G01F,Y10T

Abstract:
1. A flow sensor assembly, comprising: a housing defining an inlet, an outlet, and a flow channel extending between the inlet and the outlet, the flow channel configured to accept a flow of fluid; the housing defining a bypass channel that allows part of the flow of fluid through the flow channel to bypass part of the flow channel, the bypass channel is configured to reverse the direction of the flow of fluid in the bypass channel at least once upstream of a sensing location; a flow sensor die having two or more sense elements, one or more heater elements, and one or more bond pads operatively coupled to the two or more sense elements and the one or more heater elements, the one or more bond pads are positioned in a first region of the flow sensor die and the two or more sense elements and the one or more heater elements are positioned in a second region of the flow sensor die; the flow sensor die is secured relative to the housing at the sensing location of the bypass channel such that the two or more sense elements are in thermal communication with the flow of fluid in the bypass channel; the housing defining a partition between the first region and the second region of the flow sensor die when the flow sensor die is secured relative to the housing at the sensing location; and an encapsulant provided adjacent the first region of the flow sensor die to cover the one or more bond pads of the flow sensor die, the partition of the housing substantially containing the encapsulant from covering the two or more sense elements and the one or more heater elements that are positioned in the second region of the flow sensor die.