US2013243616A1PendingUtilityA1
Liquid circulating device and medical apparatus
Est. expiryMar 15, 2032(~5.6 yrs left)· nominal 20-yr term from priority
F04B 23/00F04B 43/095A61B 17/3203
49
PatentIndex Score
0
Cited by
0
References
0
Claims
Abstract
A liquid circulating device includes a pump chamber whose volume is changed by a volume changing unit; an inlet channel that is an inflow passage of the liquid to the pump chamber; a liquid resistance element; an outlet channel; a circulation channel of a length L through which the liquid circulates from the outlet channel to the inlet channel; and a pressure regulating mechanism that contains the liquid of a volume Vb during the non-operation of the volume changing unit and supplies the contained liquid as part of the circulating liquid during the operation of the volume changing unit. When the compliance of the circulation channel is defined as Cs, and the pressure of the liquid in the circulation channel at the position of a length x from the outlet channel during the operation of the volume changing unit is defined as P(x), the volume Vb satisfies a predetermined relationship.
Claims
exact text as granted — not AI-modifiedWhat is claimed is:
1 . A medical apparatus that circulates a liquid in non-contact with the atmospheric air, comprising:
a pump chamber whose volume is changed by a volume changing unit; an inlet channel that is an inflow passage of the liquid to the pump chamber; a liquid resistance element that controls or stops the flow of the liquid that flows from the pump chamber to the inlet channel; an outlet channel that is an outflow port of the liquid from the pump chamber; a circulation channel of a length L through which the liquid circulates from the outlet channel to the inlet channel; and a pressure regulating mechanism that contains the liquid of a volume Vb during the non-operation of the volume changing unit and supplies the contained liquid as part of the circulating liquid during the operation of the volume changing unit, wherein when the compliance of the circulation channel is defined as Cs, and the pressure of the liquid in the circulation channel at the position of a length x from the outlet channel during the operation of the volume changing unit is defined as P(x), the volume Vb satisfies the relationship of Formula (1):
Vb
≥
γ
1
L
∫
0
L
Cs
·
P
(
x
)
x
(
γ
≧
0.8
)
.
(
1
)
2 . The medical apparatus according to claim 1 ,
wherein the volume Vb satisfies the relationship of Formula (2) when the pressure of the liquid that flows into the circulation channel from the outlet channel is defined as Ps:
Vb≧γ ½ Cs·Ps
(γ≧0.8) (2)
3 . The medical apparatus according to claim 1 ,
wherein the pressure regulating mechanism includes a liquid containing chamber that contains the liquid to be used for the supply, and is deformable according to the amount of the liquid contained inside the liquid containing chamber.
4 . The medical apparatus according to claim 3 ,
wherein the liquid containing chamber is a pack formed by sealing films in the shape of a bag.
5 . The medical apparatus according to claim 4 ,
wherein the liquid containing chamber is attachable to and detachable from the liquid circulating device.
6 . The medical apparatus according to claim 1 ,
wherein the pressure regulating mechanism includes a branch channel that branches from the circulation channel.
7 . The medical apparatus according to claim 6 ,
wherein a sealing material that seals the contained liquid moves according to the pressure differential between the pressure of the liquid within the branch channel and the atmospheric pressure is arranged inside the branch channel.
8 . The medical apparatus according to claim 7 ,
wherein the liquid is a first liquid, a second liquid that is phase-separable from the first liquid is sealed between the first liquid and the sealing material inside the branch channel, and the vaporization heat of the second liquid is greater than the vaporization heat of the first liquid.
9 . The medical apparatus according to claim 1 ,
wherein the volume changing unit uses an operating element that operates depending on a change in voltage.
10 . A medical apparatus circulates a liquid in non-contact with the atmospheric air according to claim 1 .
11 . A liquid circulating device comprising:
a pump chamber whose volume is changed by a volume changing unit; an inlet channel that is an inflow passage of the liquid to the pump chamber; a liquid resistance element that controls or stops the flow of the liquid that flows from the pump chamber to the inlet channel; an outlet channel that is an outflow port of the liquid from the pump chamber; a circulation channel of a length L through which the liquid circulates from the outlet channel to the inlet channel; and a pressure regulating mechanism that contains the liquid of a volume Vb during the non-operation of the volume changing unit and supplies the contained liquid as part of the circulating liquid during the operation of the volume changing unit, wherein when the compliance of the circulation channel is defined as Cs, and the pressure of the liquid in the circulation channel at the position of a length x from the outlet channel during the operation of the volume changing unit is defined as P(x), the volume Vb satisfies the relationship of Formula (1):
Vb
≥
γ
1
L
∫
0
L
Cs
·
P
(
x
)
x
(
γ
≧
0.8
)
.
(
1
)
12 . The medical apparatus according to claim 11 ,
wherein the volume Vb satisfies the relationship of Formula (2) when the pressure of the liquid that flows into the circulation channel from the outlet channel is defined as Ps:
Vb≧γ ½ Cs·Ps
(γ≧0.8) (2)
13 . The medical apparatus according to claim 11 ,
wherein the pressure regulating mechanism includes a liquid containing chamber that contains the liquid to be used for the supply, and is deformable according to the amount of the liquid contained inside the liquid containing chamber.
14 . The medical apparatus according to claim 13 ,
wherein the liquid containing chamber is a pack formed by sealing films in the shape of a bag.
15 . The medical apparatus according to claim 14 ,
wherein the liquid containing chamber is attachable to and detachable from the liquid circulating device.
16 . The medical apparatus according to claim 11 ,
wherein the pressure regulating mechanism includes a branch channel that branches from the circulation channel.
17 . The medical apparatus according to claim 16 ,
wherein a sealing material that seals the contained liquid moves according to the pressure differential between the pressure of the liquid within the branch channel and the atmospheric pressure is arranged inside the branch channel.
18 . The medical apparatus according to claim 17 ,
wherein the liquid is a first liquid, a second liquid that is phase-separable from the first liquid is sealed between the first liquid and the sealing material inside the branch channel, and the vaporization heat of the second liquid is greater than the vaporization heat of the first liquid.
19 . The medical apparatus according to claim 11 ,
wherein the volume changing unit uses an operating element that operates depending on a change in voltage.
20 . A medical apparatus that circulates a liquid in non-contact with the atmospheric air, comprising:
a pump chamber whose volume is changed by a volume changing unit; an inlet channel that is an inflow passage of the liquid to the pump chamber; an outlet channel that is an outflow port of the liquid from the pump chamber; a circulation channel of a length L through which the liquid circulates from the outlet channel to the inlet channel; and a pressure regulating mechanism that contains the liquid of a volume Vb during the non-operation of the volume changing unit and supplies the contained liquid as part of the circulating liquid during the operation of the volume changing unit, wherein when the compliance of the circulation channel is defined as Cs, and the pressure of the liquid in the circulation channel at the position of a length x from the outlet channel during the operation of the volume changing unit is defined as P(x), the volume Vb satisfies the relationship of Formula (1):
Vb
≥
γ
1
L
∫
0
L
Cs
·
P
(
x
)
x
(
γ
≧
0.8
)
.
(
1
)Join the waitlist — get patent alerts
Track US2013243616A1 — get alerts on status changes and closely related new filings.
We store only your email — no account needed. See our privacy policy.