Electronic flow monitor, control method and anesthesia machine

Patent metadata

Field	Value
Publication number	US-2016001023-A1
Application number	US-201214235771-A
Country	US
Kind code	A1
Filing date	Jun 7, 2012
Priority date	Aug 1, 2011
Publication date	Jan 7, 2016
Grant date	—

Abstract

An electronic flow monitor, a control method and an anesthesia machine. The electronic flow controller can comprise a control module, an oxygen gas branch for delivering oxygen gas, an equilibrium gas branch for delivering equilibrium gas, and a gas mixing branch for mixing the oxygen gas and the equilibrium gas. The control module can meter an oxygen gas flow and an equilibrium gas flow through flow sensors. A first flow controller can be disposed in the oxygen gas branch, and a second flow controller can be disposed in the equilibrium gas branch. The first flow controller may be used to regulate the gas flow in the oxygen gas branch between zero and a maximum value and the second flow controller may be used to regulate the gas flow in the equilibrium gas branch between zero and a maximum value.

First claim

1 - 10 . (canceled)

11 . An electronic flow monitor, comprising a control module, an oxygen branch for delivering oxygen, an equilibrium gas branch for delivering equilibrium gas, and a gas mixing branch for mixing the oxygen and the equilibrium gas; the control module meters an oxygen flow and an equilibrium gas flow through flow sensors; wherein a first flow controller is disposed in the oxygen branch and a second flow controller is disposed in the equilibrium gas branch; the first flow controller regulates gas flow in the oxygen branch between zero and a maximum value, and the second flow controller regulates gas flow in the equilibrium gas branch between zero and a maximum value; both the first flow controller and the second flow controller communicate with the control module through signals.

12 . The electronic flow monitor of claim 11 , wherein a first on-off controller is disposed in the gas mixing branch for on-off control of the gas mixing branch; the first on-off controller communicates with the control module through signals.

13 . The electronic flow monitor of claim 12 , wherein the gas mixing branch is disposed with a mechanical flow meter for metering gas flow in the gas mixing branch.

14 . The electronic flow monitor of claim 11 , wherein comprising a plurality of equilibrium gas branches, and each of the equilibrium gas branches is respectively disposed with a second flow controller.

15 . The electronic flow monitor of claim 14 , wherein the equilibrium gas branches have one shared gas branch, wherein an input of the shared gas branch is connected with respective outputs of the equilibrium gas branches, and an output of the shared gas branch is connected with an input of the gas mixing branch.

16 . The electronic flow monitor of claim 15 , wherein the shared gas branch is disposed with a second flow sensor in communication with the control module through signals; the control module meters the equilibrium gas flow through the second flow sensor.

17 . The electronic flow monitor of claim 11 , wherein the oxygen branch is further disposed with a first flow sensor communicated with the control module through signals.

18 . The electronic flow monitor of claim 16 , wherein the oxygen branch is further disposed with a first flow sensor communicated with the control module through signals.

19 . The electronic flow monitor of claim 1 , wherein further comprising an oxygen bypass for bypassing the first flow controller.

20 . An anesthesia machine, comprising an electronic flow monitor, wherein the electronic flow monitor comprises a control module, an oxygen branch for delivering oxygen, an equilibrium gas branch for delivering equilibrium gas, and a gas mixing branch for mixing the oxygen and the equilibrium gas; the control module meters an oxygen flow and an equilibrium gas flow through flow sensors; wherein a first flow controller is disposed in the oxygen branch and a second flow controller is disposed in the equilibrium gas branch; the first flow controller regulates gas flow in the oxygen branch between zero and a maximum value, and the second flow controller regulates gas flow in the equilibrium gas branch between zero and a maximum value; both the first flow controller and the second flow controller communicate with the control module through signals.

21 . The anesthesia machine of claim 20 , wherein a first on-off controller is disposed in the gas mixing branch for on-off control of the gas mixing branch; the first on-off controller communicates with the control module through signals.

22 . The anesthesia machine of claim 21 , wherein the gas mixing branch is disposed with a mechanical flow meter for metering gas flow in the gas mixing branch.

23 . The anesthesia machine of claim 20 , wherein the electronic flow monitor comprises a plurality of equilibrium gas branches, and each of the equilibrium gas branches is respectively disposed with a second flow controller.

24 . The anesthesia machine of claim 23 , wherein the equilibrium gas branches have one shared gas branch, wherein an input of the shared gas branch is connected with respective outputs of the equilibrium gas branches, and an output of the shared gas branch is connected with an input of the gas mixing branch.

25 . The anesthesia machine of claim 24 , wherein the shared gas branch is disposed with a second flow sensor in communication with the control module through signals; the control module meters the equilibrium gas flow through the second flow sensor.

26 . The anesthesia machine of claim 20 , wherein the oxygen branch is further disposed with a first flow sensor communicated with the control module through signals

27 . The anesthesia machine of claim 20 , wherein the electronic flow monitor further comprises an oxygen bypass for bypassing the first flow controller.

28 . A method for controlling an electronic flow monitor in any one of claims 1 - 8 , comprising:
receiving preset parameters including oxygen concentration, total flow and equilibrium gas type; obtaining preset flows of oxygen and equilibrium gas based on the preset parameters; and respectively controlling actual flows of the oxygen and the equilibrium gas by a first flow controller and a second flow controller such that the actual flows and the preset flows are consistent.

29 . The method of claim 28 , wherein after obtaining the set flows of the oxygen and the equilibrium gas, further comprising:
judging whether there is system fault in the electronic flow monitor; and providing the oxygen through an oxygen bypass in the electronic flow monitor in the case of system fault, and respectively controlling the actual flows of the oxygen and the equilibrium gas by the first flow controller and the second flow controller when there is no system fault.

Assignees

• Shenzhen Mindray Bio Med Elect

Inventors

• Li Hua
• Li Honglei
• Wang Sheng
• Han Li

Classifications

• A61M16/22

  Carbon dioxide-absorbing devices {; Other means for removing carbon dioxide}(cartridges with absorbing substances for respiratory apparatus A62B19/00) · CPC title

• A61M16/204

  used for inhalation control · CPC title

• A61M2202/0208

  Oxygen · CPC title

• A61M16/1015

  using a gas flush valve, e.g. oxygen flush valve · CPC title

• A61M16/12 Primary

  by mixing different gases · CPC title