AIR FLOW MEASURING DEVICE

摘要

An air flow measuring device is adapted to be attached to a duct. The device includes a first housing, a second housing, and a flow sensor. The first housing defines a bypass flow passage which takes in a part of air flowing in the duct, and includes a hollow part and a recess. The bypass flow passage is formed in the hollow part. The recess is formed on an upper side of the hollow part in a vertical direction of the device, and at the recess, an outer surface of the first housing is recessed inward of the first housing. The second housing is formed through secondary formation with the first housing as a primary formed part. The first housing is held on a lower side of the second housing in the vertical direction. The flow sensor is disposed in the bypass flow passage.

主权项

1. A method of producing an air flow measuring device,
the air flow measuring device including:
a first housing that defines a bypass flow passage which takes in a part of air flowing in a duct and that includes:
a hollow part in which the bypass flow passage is formed;and a recess which is formed on an upper side of the hollow part in a vertical direction of the device and at which an outer surface of the first housing is recessed inward of the first housing;a second housing that is formed through secondary formation with the first housing as a primary formed part, wherein:
the recess includes side surfaces on its both sides in the vertical direction; andone of the side surfaces of the recess is located on a side of the recess that faces the second housing; anda flow sensor that is disposed in the bypass flow passage,the method comprising:
providing the first housing; andforming the second housing through the secondary formation with the first housing as the primary formed part such that the first housing is held on a lower side of the second housing in the vertical direction, wherein the forming of the second housing includes inserting a part of a die into the recess to make the one of the side surfaces serve as a die cramp surface.