Hollow resin sheet

Abstract

To provide a hollow resin sheet body that can suppress an increase in pressure loss in a fluid flow path. [Solution] A hollow resin sheet body 1 is formed by welding together a flat first resin sheet 11 having a first groove 15 and a flat second resin sheet 12 having a second groove 16 such that the first groove 15 and the second groove 16 face each other, and has a fluid flow path 17 formed by the combination of the first groove 15 and the second groove 16 inside, the fluid flow path 17 having an inlet portion 20 and an outlet portion which are at both ends and communicate with the outside, and a flow path body portion 22 which connects the inlet portion 20 and the outlet portion, and is provided with an inlet-side connecting portion 27 which is the part on the inlet portion 20 side and a flow straightening portion 3 which smoothly connects the inlet portion 20 and the curved outer surface thereof.

Claims

1. A first flat resin sheet having a first groove and a second flat resin sheet having a second groove are welded together so that the first groove and the second groove face each other, and the first groove and the second groove combine to form a fluid channel inside. The fluid flow path has an inlet and an outlet at both ends that communicate with the outside, and a flow path body that connects the inlet and the outlet. A hollow resin sheet body that satisfies at least one of the following requirements (1) and (2). (1) The axis of the inlet extends in a direction that intersects the spreading direction of the hollow resin sheet body at an angle of more than 60° but less than 120°, The fluid channel is provided with an inlet-side connecting portion, which is the inlet-side portion of the main channel body, and a flow straightening portion that smoothly connects the inlet and the flow straightening portion on the outer surface of the curved portion. (2) The axis of the outflow section extends in a direction that intersects the direction of expansion of the hollow resin sheet body at an angle of more than 60° but less than 120°, The fluid channel is provided with a flow straightening section that smoothly connects the outlet-side connecting section, which is the outlet-side portion of the main channel body, and the outlet section on the outer surface of its curved section.

2. A hollow resin sheet body according to claim 1, satisfying at least one of the following requirements (1-1) and (2-1). (1-1) Satisfying requirement (1) above, The inlet is provided on one of the first resin sheet and the second resin sheet. The rectifier is provided on the other side of the first resin sheet and the second resin sheet. (2-1) Satisfying requirement (2) above, The outflow section is provided on one of the first resin sheet and the second resin sheet. The rectifier is provided on the other side of the first resin sheet and the second resin sheet.

3. The hollow resin sheet body according to claim 1 or claim 2, wherein the inner surface of the flow straightening portion facing the fluid flow path is a curved surface, and satisfies at least one of the following requirements (1-2) and (2-2). (1-2) Satisfying requirement (1) above, In a cross-section of the fluid channel passing through the axis of the fluid channel, The inner surface of the rectifier section is The fluid flow path is located inside the intersection point P1 of the straight line extending from the inner surface on the outer side of the curved portion of the inlet and the straight line extending from the inner surface on the outer side of the curved portion of the main flow path, (2-2) Satisfying requirement (2) above, In a cross-section of the fluid channel passing through the axis of the fluid channel, The inner surface of the rectifier section is The fluid flow path is located inside the fluid flow path, beyond the intersection point P2 of the straight line extending from the inner surface on the outer side of the curved part of the outflow section and the straight line extending from the inner surface on the outer side of the curved part of the main flow path section.

4. The hollow resin sheet body according to claim 1 or claim 2, wherein the inner surface of the flow straightening portion facing the fluid flow path is flat, and satisfies at least one of the following requirements (1-3) and (2-3). (1-3) Satisfying requirement (1) above, In a cross-section of the fluid channel passing through the axis of the fluid channel, The angle θ1 between the axis L1 of the inlet and the inner surface S of the rectifying section facing the fluid flow path is 60° or less. (2-3) Satisfying requirement (2) above, In a cross-section of the fluid channel passing through the axis of the fluid channel, The angle θ2 between the axis L0 of the main body of the flow path and the inner surface S of the flow straightening section that faces the fluid flow path is 60° or less.

5. The hollow resin sheet body according to claim 1 or claim 2, wherein the axis of the inlet portion extends in a direction perpendicular to the axis of the inlet-side connection portion, and the axis of the outlet portion extends in a direction perpendicular to the axis of the outlet-side connection portion.

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