Flow velocity measuring device
First Claim
1. A flow velocity measuring device comprising a flow passage composed of an internal space having a curved wall surface, an introduction passage connected to the internal space at one end of the wall surface tangentially to the wall surface, a discharge passage connected to the internal space at the other end of the wall surface tangentially to the wall surface, and a branch passage connected to the internal space at substantially right angle to a direction, in which the wall surface is curved, and a sensor element arranged in the branch passage or a flow passage connected to the branch passage, and wherein a fluid is introduced into the internal space from the introduction passage to branch into the discharge passage and the branch passage, and the flow velocity of the fluid taken out from the branch passage is measured by the sensor element.
1 Assignment
0 Petitions
Accused Products
Abstract
A flow velocity measuring device is able to conduct a fluid to a sensor element after removal of dust and dirt contained in the fluid to accurately measure the flow velocity of the fluid even when the fluid is low in flow velocity and the device is mounted in any direction. A flow passage is formed by internal spaces, which have curved wall surfaces, introduction passages connected to the internal spaces at one ends of the wall surfaces tangentially to the wall surfaces, discharge passages connected to the internal spaces at the other ends of the wall surfaces tangentially to the wall surfaces, and branch discharge passages connected to the internal spaces at substantially right angle to a direction, in which the wall surfaces are curved, and a sensor element is arranged in the branch passage or a flow passage connected to the branch passage.
7 Citations
19 Claims
-
1. A flow velocity measuring device comprising a flow passage composed of
an internal space having a curved wall surface, an introduction passage connected to the internal space at one end of the wall surface tangentially to the wall surface, a discharge passage connected to the internal space at the other end of the wall surface tangentially to the wall surface, and a branch passage connected to the internal space at substantially right angle to a direction, in which the wall surface is curved, and a sensor element arranged in the branch passage or a flow passage connected to the branch passage, and wherein a fluid is introduced into the internal space from the introduction passage to branch into the discharge passage and the branch passage, and the flow velocity of the fluid taken out from the branch passage is measured by the sensor element.
-
8. A flow velocity measuring device comprising a first layer substrate, a second layer substrate, and an intermediate plate interposed between the first layer substrate and the second layer substrate,
a first layer flow passage provided between the first layer substrate and the intermediate plate and including an internal space having a curved wall surface, an introduction passage connected to the internal space at one end of the wall surface tangentially to the wall surface, and a discharge passage connected to the internal space at the other end of the wall surface tangentially to the wall surface, a branch passage provided on the intermediate plate to extend through the intermediate plate to be connected to the internal space, a second layer flow passage provided between the intermediate plate and the second layer substrate to be connected to the branch passage, a sensor element provided on the first layer substrate or the second layer substrate to be arranged in the second layer flow passage or a flow passage connected to the second layer flow passage, and wherein a fluid is introduced into the internal space from the introduction passage to branch into the discharge passage and the branch passage, and the flow velocity of the fluid taken into the second layer flow passage from the branch passage is measured by the sensor element.
Specification