Search

JP-2026075275-A - Fluid flow systems, fuel cell systems, and mobile bodies

JP2026075275AJP 2026075275 AJP2026075275 AJP 2026075275AJP-2026075275-A

Abstract

[Problem] To provide a technology that can reduce the possibility of damage to the mesh portion of a strainer that captures foreign objects. [Solution] The fluid flow system comprises a pipe through which fluid flows, a strainer placed inside the pipe, and a gasket that seals the space between the pipe and the strainer. The strainer has a mesh portion for removing foreign matter from the fluid and a support portion located upstream of the mesh portion in the fluid flow direction and supporting the mesh portion. The pipe has an inner wall and a stepped portion protruding inward from the inner wall. The gasket is positioned to be sandwiched between the support portion and the stepped portion along the flow direction. [Selection Diagram] Figure 2

Inventors

  • 丸井 建次郎

Assignees

  • トヨタ自動車株式会社

Dates

Publication Date
20260508
Application Date
20241022

Claims (5)

  1. A fluid flow system, Piping for the flow of fluid, A strainer placed inside the aforementioned piping, A gasket that seals the space between the piping and the strainer is provided, The strainer has a mesh portion for removing foreign matter from the fluid, and a support portion located upstream of the mesh portion in the fluid flow direction and supporting the mesh portion. The aforementioned piping has an inner wall and a stepped portion that protrudes inward from the inner wall. The gasket is positioned to be sandwiched between the support portion and the stepped portion along the flow direction in a fluid flow system.
  2. A fluid flow system according to claim 1, A fluid flow system in which the shape of the mesh portion is a frustum shape in which the outer circumference of the cross section perpendicular to the flow direction decreases as it moves away from the support portion.
  3. A fluid flow system according to claim 1, The shape of the mesh portion is cylindrical, extending along the flow direction, in a fluid flow system.
  4. A fuel cell system, A fluid flow system according to any one of claims 1 to 3, A fuel cell system comprising a fuel cell stack connected to the piping of the fluid flow system, the fuel cell stack having a cathode, an anode, and an electrolyte membrane sandwiched between the cathode and the anode.
  5. It is a mobile object, A mobile body comprising the fuel cell system described in claim 4.

Description

This disclosure relates to fluid flow systems, fuel cell systems, and mobile devices. Conventionally, fuel cell systems in which a strainer with a wire mesh is placed inside the piping are known (Patent Document 1). Japanese Unexamined Patent Publication No. 8-124589 A diagram showing the schematic configuration of a fuel cell system.A diagram showing the arrangement of the strainer and gasket in the first embodiment.A diagram showing the arrangement of a strainer and gasket as an example.A graph showing the changes in strain in the mesh section.A diagram showing the arrangement of the strainer and gasket in the second embodiment.A diagram illustrating how to secure the strainer. A. First embodiment: Figure 1 shows a schematic configuration of the fuel cell system 1. The fuel cell system 1 is mounted on a mobile device such as a vehicle. The fuel cell system 1 comprises a fuel cell stack 90 and a fluid flow system 10. The fuel cell stack 90 has a stack structure in which multiple single cells are stacked. Although not shown in the figure, each single cell has a cathode, an anode, an electrolyte membrane sandwiched between the cathode and the anode, a membrane electrode assembly (MEA) which is formed by joining these, and a pair of separators which sandwich the membrane electrode assembly from both sides. When air (Air) is supplied to the cathode and hydrogen gas ( H₂ ) is supplied to the anode, the fuel cell stack 90 generates electricity through an electrochemical reaction. The fluid flow system 10 is a system for circulating fluid. In this embodiment, the fluid flow system 10 circulates air and hydrogen gas as fluids to the fuel cell stack 90. The fluid flow system 10 includes a cathode-side supply and discharge system 11 and an anode-side supply and discharge system 15. The cathode-side supply and discharge system 11 supplies air to the fuel cell stack 90 and discharges cathode-off gas from the fuel cell stack 90. The cathode-side supply and discharge system 11 comprises multiple flow paths 111-113 formed within the fluid-flowing piping 100, an air cleaner 123, an air compressor 125, a supply pump 127, an intercooler 129, and multiple valves 131-133. The cathode-side supply channel 111 is located upstream in the fluid flow direction D1. The cathode-side supply channel 111 is connected to the air intake port 121 and the fuel cell stack 90. The cathode-side supply channel 111 is a channel for supplying air to the fuel cell stack 90. The cathode-side discharge channel 112 is located downstream in the fluid flow direction D1. The cathode-side discharge channel 112 is connected to the fuel cell stack 90 and the exhaust port 199 (such as a muffler). The cathode-side discharge channel 112 is a channel for discharging cathode-off gas from the exhaust port 199. The bypass channel 113 is connected to both the cathode-side supply channel 111 and the cathode-side discharge channel 112. The bypass channel 113 is a channel for circulating air between the cathode-side supply channel 111 and the cathode-side discharge channel 112. The air cleaner 123 is positioned in the cathode-side supply passage 111 between the intake port 121 and the air compressor 125. The air cleaner 123 removes foreign matter from the air supplied from the intake port 121. The air compressor 125 is positioned in the cathode-side supply passage 111 between the air cleaner 123 and the supply pump 127. The air compressor 125 compresses and discharges the air flowing in through the air cleaner 123. The supply pump 127 is positioned in the cathode-side supply passage 111 between the air compressor 125 and the intercooler 129. The supply pump 127 supplies the compressed air to the intercooler 129. The intercooler 129 is positioned in the cathode-side supply passage 111 between the supply pump 127 and the first valve 131. The intercooler 129 cools and discharges the air that has been heated by adiabatic compression by the air compressor 125. The first valve 131 is positioned in the cathode-side supply passage 111 between the intercooler 129 and the fuel cell stack 90. The first valve 131 adjusts the flow rate of air supplied to the fuel cell stack 90. The second valve 132 is positioned in the cathode-side discharge passage 112 between the fuel cell stack 90 and the outlet 199. The second valve 132 adjusts the back pressure of the cathode off-gas. The third valve 133 is positioned on the bypass passage 113. The third valve 133 adjusts the flow rate of air flowing through the bypass passage 113. The cathode-side supply and discharge system 11 further includes a cathode-side strainer 135 and a cathode-side gasket 138. The cathode-side strainer 135 is positioned between the first valve 131 and the fuel cell stack 90 within the piping 100 that forms the cathode-side supply passage 111. The cathode-side strainer 135 removes foreign matter from the air supplied to the fuel cell stack 90. For example, if solid foreign matter flows into the fuel cell stack 90, t