reservoir

Abstract

A reservoir (1) includes a housing (100), an inflow port (200), an outflow port (300), and a guide pipe (400) connected to an end of a downstream side of the inflow port (200) and guiding liquid into the housing (100). The inflow port (200) is connected to the housing (100) in a form intersecting with a plumb direction. The guide pipe (400) is formed in a cylindrical shape and has a shape extending from the end of the downstream side of the inflow port (200) toward a lower side of the plumb. The housing (100) has an opposite wall (121) formed at a position opposite to a lower end of the guide pipe (400) and a guide wall (122) guiding liquid from the opposite wall (121) toward the lower side.

Description

Technical Field

[0001] This invention relates to a liquid storage tank. Background Technology

[0002] Previously, storage tanks for storing liquids such as myocardial protectant solutions were known. For example, Japanese Patent Application Publication No. 2015-100609 discloses a myocardial protectant receiver, which includes a tank shell forming a storage space for the myocardial protectant solution, an inlet port provided at the upper part of the tank shell, and an outlet port provided at the lower part of the tank shell. A stirring blade is provided inside the tank shell, and an inlet tube communicating with the inlet port is attached to the inlet end of the stirring blade. In order to eject liquid from the inlet tube, the inlet tube gradually narrows in diameter as it moves towards the front end.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2015-100609 Summary of the Invention

[0006] The technical problem that the invention aims to solve

[0007] Preferably, the storage tank described in Japanese Patent Application Publication No. 2015-100609 reduces the amount of air bubbles generated in the myocardial protective fluid flowing out from the outlet port.

[0008] The purpose of this invention is to provide a liquid storage tank capable of suppressing the generation of air bubbles in the liquid flowing out from the outlet port.

[0009] Technical solutions adopted to solve technical problems

[0010] According to one aspect of the invention, a liquid storage tank includes: a housing capable of storing liquid; an inlet port connected to the upper part of the housing and allowing liquid to flow into the housing; an outlet port connected to the lower part of the housing and allowing liquid to flow out of the housing; and an inlet pipe connected to a downstream end of the inlet port and guiding liquid into the housing, the inlet port being connected to the housing in a configuration intersecting the direction of a plumb bob, the inlet pipe being cylindrical and having a shape extending downward from the downstream end of the inlet port toward the plumb bob, the housing having a counter wall formed at a position opposite to the lower end of the inlet pipe and a guide wall guiding the liquid downward from the counter wall.

[0011] Invention Effects

[0012] According to the present invention, a liquid storage tank capable of suppressing the generation of bubbles in the liquid flowing out from the outlet port can be provided. Attached Figure Description

[0013] Figure 1 This is a perspective view of a liquid storage tank according to an embodiment of the present invention.

[0014] Figure 2 yes Figure 1 The top view of the liquid storage tank shown.

[0015] Figure 3 yes Figure 1 The rear view of the liquid storage tank shown.

[0016] Figure 4 yes Figure 2 and Figure 3 A cross-sectional view at lines I, VI, and V in the diagram.

[0017] Figure 5 yes Figure 4 An enlarged view of the area indicated by the solid line V in the figure. Detailed Implementation

[0018] Embodiments of the present invention will be described with reference to the accompanying drawings. Furthermore, in the drawings referred to below, the same or equivalent components are labeled with the same reference numerals.

[0019] Figure 1 This is a perspective view of a liquid storage tank according to an embodiment of the present invention. Figure 2 yes Figure 1 The top view of the liquid storage tank shown. Figure 3 yes Figure 1 The rear view of the liquid storage tank shown. Figure 4 yes Figure 2 and Figure 3 A cross-sectional view at lines I, VI, and V. The aforementioned reservoir 10 is used in the artificial heart-lung circuit of an artificial heart-lung device. The reservoir 10 is particularly suitable for use as a receiver of myocardial protective fluid.

[0020] like Figures 1-4 As shown, the liquid storage tank 10 of this embodiment includes a shell 100, an inflow port 200, an outflow port 300, and an inlet pipe 400.

[0021] The outer casing 100 is capable of storing liquids (such as myocardial protective fluid). A mounting portion 20 for mounting an artificial lung, which is part of an artificial heart-lung device, is provided on the outer casing 100. The outer casing 100 has a main body 110 and a cover 150.

[0022] The main body 110 opens upwards. The main body 110 is made of resin, for example. The main body 110 has a body section 120 and a cylindrical section 130.

[0023] The torso 120 is roughly shaped like a four-cornered cylinder. Details of the torso 120 will be described later.

[0024] The cylindrical portion 130 is connected to the lower end of the body portion 120. The cylindrical portion 130 has a shape in which its cross-section gradually decreases as it faces downward.

[0025] The cap 150 is connected to the upper end of the main body 110 and seals the opening of the main body 110. The cap 150 is made of resin, for example. A port for supplying medicine or the like is connected to the cap 150.

[0026] The inlet port 200 is connected to the upper part of the housing 100, and more specifically to the cover 150. The inlet port 200 is a port for allowing liquid to flow into the housing 10. A circulation inlet line L1 is connected to the inlet port 200.

[0027] The inlet port 200 is connected to the outer casing 100 in a configuration intersecting the direction of the plumb bob. In this embodiment, the inlet port 200 is connected to the cover 150 in a configuration orthogonal to the direction of the plumb bob (horizontal configuration). Figure 4 As shown, the inflow port 200 has a shape in which its inner diameter gradually decreases as it approaches the downstream end of the inflow port 200. However, the inner diameter of the inflow port 200 can also be formed constantly in its length direction. Additionally, as... Figure 4 As shown, the downstream end of the inlet port 200 has a wall surface 210 opposite to the flow of the liquid. The wall surface 210 is preferably arranged in a vertical direction relative to the flow of the liquid, but is not limited thereto.

[0028] The outlet port 300 is connected to the lower part of the housing 100, and more specifically, to the lower end of the cylindrical portion 130. The outlet port 300 is a port for allowing liquid to flow out of the housing 100. A circulation outlet line L2 is connected to the outlet port 300. Liquid flowing out of the outlet port 300 flows into the housing 100 through the circulation outlet line L2 and the circulation inlet line L1, and then flows into the housing 100 through the inlet port 200.

[0029] The inlet tube 400 is connected to the downstream side of the inlet port 200, more specifically to the downstream end of the inlet port 200, and introduces liquid into the housing 100. The inlet tube 400 has a shape extending downward from the downstream end of the inlet port 200. The inlet tube 400 is formed in a cylindrical shape. The inlet tube 400 has a shape in which its inner diameter gradually increases downward. However, the inner diameter of the inlet tube 400 may also be formed to be constant in its length direction.

[0030] Here, we will explain the torso (section 120). For example... Figure 4 As shown, the torso 120 has a relative wall 121, a guide wall 122, a cross wall 123 and a connecting wall 124.

[0031] The opposing wall 121 is formed at a position opposite to the lower end of the inlet tube 400. For example... Figure 5 As shown, the opposing wall 121 has a shape that gradually faces downwards as it approaches the inner side of the body 120 (as it approaches the guide wall 122). In this embodiment, the opposing wall 121 has a shape that faces obliquely upwards ( Figure 5 The shape is curved in a way that bulges out to the upper right. More specifically, when viewed in cross-section, it is curved in such a way that the slope of the relative wall 121 changes from positive to negative at the lower end of the inlet tube 400.

[0032] The guide wall 122 guides the liquid downward from the opposing wall 121. The guide wall 122 is formed in a flat plate shape.

[0033] The cross wall 123 has a shape that extends from the lower end of the guide wall 122 in a direction intersecting the guide wall 122. The cross wall 123 has a shape that gradually slopes slightly downward as it moves away from the guide wall 122.

[0034] Connecting wall 124 connects cross wall 123 to cylindrical portion 130. Connecting wall 124 has a shape that gradually slopes downwards as it approaches cylindrical portion 130. For example... Figure 4 As shown, the angle θ2 between the connecting wall 124 and the horizontal is larger than the angle θ1 between the intersecting wall 123 and the horizontal.

[0035] like Figure 5 As shown, the opposing wall 121 has a central opposing portion 121a located below the plumb line at the center 401 of the lower end of the inlet tube 400. The distance H1 between the center 401 of the lower end of the inlet tube 400 and the central opposing portion 121a is preferably 0.1 times or more and 0.8 times or less than the inner diameter φ of the lower end of the inlet tube 400, more preferably 0.4 times or more and 0.6 times or less. In this embodiment, the distance H1 is set to 0.42 times the inner diameter φ of the lower end of the inlet tube 400. The angle between the central axis of the inlet tube 400 and the tangent in the central opposing portion 121a is preferably set to about 30 degrees to 75 degrees.

[0036] The distance H2 between the portion 402 opposite to the upper end 121b of the opposite wall 121 in the lower end of the inlet tube 400 and the upper end 121b is preferably 0.05 times or more and 0.4 times or less than the inner diameter φ of the lower end of the inlet tube 400, more preferably 0.2 times or more and 0.3 times or less. In this embodiment, the distance H2 is set to 0.26 times the inner diameter φ of the lower end of the inlet tube 400. The angle between the tangent in the upper end 121b and the horizontal is smaller than the angle between the tangent in the central opposite portion 121a and the horizontal.

[0037] The distance H3 between the portion 403 opposite to the lower end 121c of the lower end of the inlet tube 400 and the lower end 121c is preferably 0.2 times or more and 1.6 times or less than the inner diameter φ of the lower end of the inlet tube 400, more preferably 0.8 times or more and 1.2 times or less. In this embodiment, the distance H3 is set to 0.89 times the inner diameter φ of the lower end of the inlet tube 400. The angle between the tangent in the lower end 121c and the horizontal is larger than the angle between the tangent in the central opposite portion 121a and the horizontal.

[0038] Preferably, the distances H1, H2, and H3 satisfy H2 < H1 < H3. The distance H1 is preferably more than 1.1 times and less than 3 times the distance H2, and the distance H3 is preferably more than 1.1 times and less than 5 times the distance H2.

[0039] In the liquid storage tank 10 of this embodiment described above, the liquid flowing from the circulation inflow line L1 to the inflow port 200 collides with the wall 210 of the inflow port 200. Therefore, the flow velocity of the liquid towards the inlet pipe 400 decreases. Then, the liquid flows in the inlet pipe 400 and collides with the opposing wall 121 formed below the inlet pipe 400. Therefore, the flow velocity of the liquid towards the housing 100 further decreases. Subsequently, the liquid that has collided with the opposing wall 121... Figure 4 As indicated by the middle arrow, the guide wall 122, the cross wall 123, and the connecting wall 124 face downwards, thus suppressing the generation of bubbles in the liquid flowing out from the outlet port 300.

[0040] [Way]

[0041] Those skilled in the art should understand that the above exemplary embodiments are specific examples of the following approaches.

[0042] A liquid storage tank according to one aspect of this disclosure includes: a housing capable of storing liquid; an inlet port connected to the upper part of the housing and allowing liquid to flow into the housing; an outlet port connected to the lower part of the housing and allowing liquid to flow out of the housing; and an inlet pipe connected to a downstream end of the inlet port and guiding liquid into the housing. The inlet port is connected to the housing in a configuration intersecting the direction of a plumb bob. The inlet pipe is cylindrical and has a shape extending downward from the downstream end of the inlet port toward the plumb bob. The housing has a counter wall formed at a position opposite to the lower end of the inlet pipe and a guide wall guiding the liquid downward from the counter wall.

[0043] In this reservoir, the liquid flowing in from the inlet port (e.g., myocardial protectant) collides with the downstream end of the inlet port and, after flowing through the inlet tube, collides with the opposing wall formed below the inlet tube. As a result, the flow rate of the liquid toward the housing decreases, and the liquid that has collided with the opposing wall moves downward along the guide wall, thereby suppressing the generation of bubbles in the liquid flowing out from the outlet port.

[0044] Furthermore, it is preferable that the downstream end of the aforementioned inlet port has a wall surface opposite to the flow of the liquid. In this way, the liquid flowing into the inlet port collides with the wall surface before flowing into the inlet pipe, thus reliably reducing the liquid velocity before it flows into the inlet pipe.

[0045] Furthermore, it is preferable that the aforementioned opposing wall has a shape that gradually faces downwards as it approaches the aforementioned guide wall.

[0046] Furthermore, preferably, the opposing wall has a central opposing portion located below the plumb bob at the center of the lower end of the inlet tube, and the distance between the center of the lower end of the inlet tube and the central opposing portion is more than 0.1 times and less than 0.8 times the inner diameter of the lower end of the inlet tube.

[0047] Alternatively, the aforementioned inflow port may also have a shape in which its inner diameter gradually decreases as it approaches the aforementioned inlet pipe.

[0048] Alternatively, the aforementioned inlet tube may also have a shape in which its inner diameter gradually increases as it faces downwards.

[0049] In this method, since the flow rate of the liquid decreases as it moves toward the downstream side of the inlet pipe, the generation of bubbles can be suppressed more reliably.

[0050] In addition, preferably, the outer casing also has a cross wall, which has a shape that extends from the lower end of the guide wall in a direction that intersects with the guide wall.

[0051] In this way, the liquid flowing down the sidewalls has a reduced flow rate due to collisions with the cross walls, thus further suppressing the generation of bubbles.

[0052] In addition, preferably, the outer casing also has a cylindrical portion disposed below the cross wall, the outlet port being connected to the lower end of the cylindrical portion, and the cylindrical portion having a shape in which its cross-section gradually decreases as it approaches the outlet port.

[0053] In this way, since the liquid level in the cylinder can easily rise, the distance from the cross wall to the liquid level is reduced when the liquid level is lower than the cross wall in the cylinder section. Therefore, the generation of bubbles when the liquid from the cross wall downwards adheres to the liquid level in the cylinder section can be effectively suppressed.

[0054] In this case, it is preferable that the outer casing also has a connecting wall that connects the cross wall to the cylindrical portion, the connecting wall having a shape that gradually slopes downwards as it approaches the cylindrical portion.

[0055] Furthermore, the embodiments disclosed herein should be considered illustrative in all respects and not limiting. The scope of the invention is defined by the claims rather than by the description of the embodiments above, and is intended to include all changes within the meaning and scope equivalent to the claims.

[0056] Symbol Explanation

[0057] 10 Storage tank, 100 Outer shell, 110 Main body, 120 Torso, 121 Opposite wall, 121a Central opposite part, 122 Guide wall, 123 Cross wall, 124 Connecting wall, 130 Cylinder, 150 Cover, 200 Inlet port, 210 Wall surface, 300 Outlet port, 400 Inlet pipe, L1 Circulation inlet pipeline, L2 Circulation outlet pipeline.

Claims

1. A liquid storage tank, comprising: An outer casing capable of storing liquid; An inflow port is provided, which is connected to the upper part of the housing and allows liquid to flow into the housing. An outlet port is connected to the lower part of the housing and allows liquid to flow out of the housing. as well as An inlet tube is connected to the downstream end of the inlet port and introduces liquid into the housing. The inflow port is connected to the outer casing in a configuration that intersects with the direction of the plumb bob. The inlet tube is formed in a cylindrical shape, having a shape that extends from the downstream end of the inlet port toward the downward side of the plumb bob. The outer casing has: A relative wall is formed at a position opposite to the lower end of the inlet tube and collides with the liquid; as well as A guiding wall that guides the liquid downward from the opposing wall. The opposing walls are curved. The opposing walls have a central opposing portion located below the plumb bob at the center of the lower end of the inlet tube. The angle between the tangent at the upper end of the opposing wall and the horizontal is smaller than the angle between the tangent at the central opposing part and the horizontal. The angle between the tangent at the lower end of the opposing wall and the horizontal is greater than the angle between the tangent at the central opposing part and the horizontal.

2. The liquid storage tank as described in claim 1, characterized in that, The downstream end of the inflow port has a wall surface opposite to the flow of the liquid.

3. The liquid storage tank as described in claim 1, characterized in that, The opposing wall has a shape that gradually faces downwards as it approaches the guide wall.

4. The liquid storage tank as described in claim 1, characterized in that, The distance between the center of the lower end of the inlet tube and the opposite part of the center is more than 0.1 times and less than 0.8 times the inner diameter of the lower end of the inlet tube.

5. The liquid storage tank as described in claim 1, characterized in that, The inflow port has a shape in which its inner diameter gradually decreases as it approaches the inlet tube.

6. The liquid storage tank as described in claim 1, characterized in that, The inlet tube has a shape in which its inner diameter gradually increases as it faces downward.

7. The liquid storage tank as described in claim 1, characterized in that, The housing also has a cross wall having a shape that extends from the lower end of the guide wall in a direction intersecting the guide wall.

8. The liquid storage tank as described in claim 7, characterized in that, The outer casing also has a cylindrical portion disposed below the cross wall. The outlet port is connected to the lower end of the cylinder. The cylindrical portion has a shape in which its cross-section gradually decreases as it approaches the outlet port.

9. The liquid storage tank as described in claim 8, characterized in that, The outer casing also has a connecting wall that connects the cross wall to the cylindrical portion. The connecting wall has a shape that slopes downwards as it approaches the cylindrical portion.

Images