A gas flow switching device and anesthesia ventilator

Abstract

The present invention provides a gas flow direction switching device and an anesthesia ventilator. The gas flow direction switching device comprises a gas inlet, an integrated breathing circuit port, a non-circulating breathing circuit port and a shell. The gas flow direction switching device also comprises an eccentric switching handle, an elongated rod and a switching valve core. The eccentric switching handle is used to drive the elongated rod to make the elongated rod be in a first position or a second position. The elongated rod sleeve is provided with a first sealing member, and the switching valve core is sleeved with a second sealing member. A through hole connected to the first inner cavity is provided on the shell. When the elongated rod is in the first position, the integrated breathing circuit port is blocked by the switching valve core, and the through hole is connected to the outside to issue an alarm. When the elongated rod is in the second position, the non-circulating breathing circuit port is blocked by the switching valve core, and the through hole is located in the sealing area between the first sealing member and the second sealing member, so that when the eccentric switching handle is switched to the non-circulating breathing circuit, the anesthesia ventilator alarm is mechanically triggered, thereby improving the reliability and safety of the surgical operation process.

Description

Technical Field

[0001] The invention belongs to the field of anesthesia ventilators and relates to a gas flow direction switching device and anesthesia ventilators. Background Art

[0002] The current anesthesia ventilator provides fresh gas to an integrated breathing circuit or a non-repetitive breathing circuit through a hose connection. The prior art provides a gas flow direction switching device for an anesthesia ventilator, the gas flow direction switching device for anesthesia ventilator comprises a gas inlet, an integrated breathing circuit port, a non-circulating breathing circuit port and a shell, the gas inlet, the integrated breathing circuit port and the non-circulating breathing circuit port are interconnected in the shell, the gas flow direction switching device also comprises an eccentric switching handle with a cam unit, an elongated rod, a switching valve core and an elastic member, the shell has a cam limit groove that can cooperate with the cam unit at a first limit position and a second limit position, the eccentric The eccentric switching handle is pivotally connected to one end of the elongated rod, and the other end of the elongated rod is fixedly connected to the switching valve core. The elongated rod has an elastic member limiting protrusion, and the elastic member is accommodated between the elastic member limiting protrusion and the shell. The switching valve core is configured as follows: when the eccentric switching handle is located at the first limiting position, the integrated breathing circuit port is blocked by the switching valve core; when the eccentric switching handle is located at the second limiting position, the non-circulating breathing circuit port is blocked by the switching valve core. Through the cam unit, the cam limiting groove and the elastic member, the eccentric switching handle is configured to automatically rebound and be limited to the first limiting position or the second limiting position.

[0003] The gas flow direction switching device of the anesthesia ventilator in the prior art can safely switch the fresh gas to the patient between the integrated breathing circuit and the non-repetitive breathing circuit. And the handle with the cam unit can prevent the switching valve from being in an unsafe position. However, when switching to the non-repetitive breathing circuit, there is no fresh gas supplied to the patient, and the patient is in a state of suffocation. Due to the limited number of medical staff and the large number of patients, omissions are prone to occur during daily monitoring, resulting in medical accidents. In addition, the life of the gas flow direction switching device of the anesthesia ventilator in the prior art is relatively low. Summary of the invention

[0004] One of the purposes of the present invention is to provide a gas flow direction switching device and an anesthesia ventilator to solve the problem of low safety factor of the gas flow direction switching device of the anesthesia ventilator in the prior art.

[0005] Another object of the present invention is to solve the problem of short life of the gas flow direction switching device of the anesthesia ventilator in the prior art.

[0006] In order to solve the above technical problems, the present invention provides a gas flow direction switching device for an anesthesia ventilator, comprising a gas inlet, an integrated breathing circuit port, a non-circulating breathing circuit port and a shell, wherein the gas inlet, the integrated breathing circuit port and the non-circulating breathing circuit port are interconnected in the shell, the gas flow direction switching device also comprises an eccentric switching handle, an elongated rod and a switching valve core, the shell has an inner cavity, the inner cavity comprises a first inner cavity and a second inner cavity that are interconnected, the eccentric switching handle is used to drive the elongated rod to make the elongated rod in a first position or a second position, the other end of the elongated rod is fixedly connected to the switching valve core, the elongated rod is sleeved with a first sealing member, and the switching valve core is sleeved with a second sealing member;

[0007] The shell is provided with a through hole in communication with the first inner cavity, the through hole is used to communicate with the alarm control gas circuit of the anesthesia ventilator, when the elongated rod is located at the first position, the integrated breathing circuit port is blocked by the switching valve core, the through hole is located outside the sealing area of ​​the first sealing member and the second sealing member, and the through hole is communicated with the outside, when the elongated rod is located at the second position, the non-circulating breathing circuit port is blocked by the switching valve core, and the through hole is located in the sealing area between the first sealing member and the second sealing member;

[0008] The alarm control gas circuit of the anesthesia breathing machine is a breathing gas circuit connecting the user and the PEEP valve of the anesthesia breathing machine, and an alarm is issued when the alarm control gas circuit of the anesthesia breathing machine is connected to the outside world.

[0009] Preferably, it also includes a safety valve, which is sealingly connected to the shell and is used to adjust the pressure of the gas flowing out of the port of the integrated breathing circuit.

[0010] Preferably, an elastic member is further included, and the elastic member is accommodated between the first sealing member and the housing.

[0011] Preferably, the elastic member is a spring.

[0012] Preferably, when the elongated rod is located at the first position, a sealing groove matching the first sealing member is provided at a position on the first inner cavity that contacts the first sealing member.

[0013] Preferably, it also includes a PEEP valve-controlled gas hose connector, one end of which is fixed in the through hole, and the other end is connected to the alarm control gas circuit of the anesthesia ventilator through a hose.

[0014] Preferably, the surface roughness Rz of the gas flow switching device is ≤4 μm.

[0015] Preferably, the eccentric switching handle has a cam unit, and the housing has two cam limiting grooves that can cooperate with the cam unit.

[0016] Preferably, the cam unit is pivotally connected to one end of the elongated rod, and the cam unit forms an eccentric cam around the pivotal position.

[0017] The present invention also provides an anesthesia ventilator, comprising the above-mentioned gas flow direction switching device.

[0018] Compared with the prior art, the present invention provides a gas flow direction switching device for use on an anesthesia ventilator, comprising a gas inlet, an integrated breathing circuit port, a non-circulating breathing circuit port and a shell, wherein the gas inlet, the integrated breathing circuit port and the non-circulating breathing circuit port are interconnected in the shell, the gas flow direction switching device also comprises an eccentric switching handle, an elongated rod and a switching valve core, the shell has an inner cavity, the inner cavity comprises a first inner cavity and a second inner cavity that are interconnected, the eccentric switching handle is used to drive the elongated rod so that the elongated rod is in a first position or a second position, the other end of the elongated rod is fixedly connected to the switching valve core, the elongated rod is sleeved with a first sealing member, and the switching valve core is sleeved with a second sealing member A through hole connected to the first inner cavity is provided on the shell, and the through hole is used to communicate with the alarm control air circuit of the anesthesia ventilator. When the elongated rod is located at the first position, the integrated breathing circuit port is blocked by the switching valve core, and the through hole is located outside the sealing area of ​​the first seal and the second seal, and the through hole is connected to the outside world. When the elongated rod is located at the second position, the non-circulating breathing circuit port is blocked by the switching valve core, and the through hole is located in the sealing area between the first seal and the second seal. The alarm control air circuit of the anesthesia ventilator is a breathing air circuit connecting the user and the PEEP valve of the anesthesia ventilator. When the alarm control air circuit of the anesthesia ventilator is connected to the outside world, an alarm is issued. When the eccentric switching handle is switched to a non-circulating breathing circuit, the breathing air circuit connecting the user and the PEEP valve loses positive pressure, causing the anesthesia ventilator to alarm. The anesthesia ventilator alarm is triggered mechanically, which greatly improves the reliability and safety of the surgical operation process. In addition, the mechanical triggering of the anesthesia ventilator alarm will not cause malfunctions due to the cleaning of the anesthesia ventilator equipment, thereby improving the stability of the alarm. In addition, the alarm is realized by using the loss of positive pressure in the breathing air circuit connecting the user and the PEEP valve integrated in the anesthesia ventilator, which also reduces the cost of use.

[0019] Furthermore, the surface roughness Rz of the gas flow direction switching device is ≤4 μm, which improves the neutral salt spray corrosion resistance, thereby increasing the life of the gas flow direction switching device and the reliability of the anesthesia ventilator. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an eccentric switching handle of a gas flow direction switching device provided by an embodiment of the present invention when it is located at a first limit position;

[0021] Figure 2 is a three-dimensional schematic diagram of an eccentric switching handle of a gas flow direction switching device provided by an embodiment of the present invention when it is located at a first limit position;

[0022] Figure 3 It is a structural schematic diagram of an eccentric switching handle of a gas flow direction switching device provided by an embodiment of the present invention when it is located at a second limit position;

[0023] Figure 4 is a three-dimensional schematic diagram of an eccentric switching handle of a gas flow direction switching device provided by an embodiment of the present invention when it is located at a second limit position;

[0024] Among them, 10-gas inlet; 11-integrated breathing circuit port; 12-non-circulating breathing circuit port; 13-housing; 14-cam unit; 15-eccentric switching handle; 16-long rod; 17-switching valve core; 18-cam limit groove; 19-first sealing member; 20-second sealing member; 21-elastic member; 22-sealing groove; 23-PEEP valve-controlled gas hose connector. DETAILED DESCRIPTION

[0025] The following is a further detailed description of a gas flow switching device and anesthesia ventilator proposed by the present invention in conjunction with the accompanying drawings and specific embodiments. According to the claims and the following description, the advantages and features of the present invention will become clearer. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. The same or similar reference numerals in the drawings represent the same or similar components.

[0026] Figure 1 1 is a structural schematic diagram of an eccentric switching handle 15 of a gas flow direction switching device provided by an embodiment of the present invention when it is located at a first limit position. Figure 2 is a three-dimensional schematic diagram of an eccentric switching handle 15 of a gas flow direction switching device provided by an embodiment of the present invention when it is located at a first limit position. Figure 3 1 is a structural schematic diagram of an eccentric switching handle 15 of a gas flow direction switching device provided by an embodiment of the present invention when it is located at a second limit position. Figure 4 This is a three-dimensional schematic diagram of an eccentric switching handle 15 of a gas flow direction switching device provided by an embodiment of the present invention when it is located at the second limit position. Figure 1 , Figure 2 , Figure 3 and Figure 4, a gas flow direction switching device, used on an anesthesia ventilator, comprises a gas inlet 10, an integrated breathing circuit port 11, a non-circulating breathing circuit port 12 and a shell 13, wherein the gas inlet 10, the integrated breathing circuit port 11 and the non-circulating breathing circuit port 12 are interconnected in the shell 13, the gas flow direction switching device further comprises an eccentric switching handle 15, an elongated rod 16, and a switching valve core 17, the shell 13 has an inner cavity, the inner cavity comprises a first inner cavity and a second inner cavity which are interconnected, the eccentric switching handle 15 is used to drive the elongated rod 16 so that the elongated rod 16 is in a first position or a second position, the other end of the elongated rod 16 is fixedly connected to the switching valve core 17, the elongated rod 16 is sleeved with a first sealing member 19, and the switching valve core 17 is sleeved with a second sealing member 20;

[0027] The housing 13 is provided with a through hole in communication with the first inner cavity, the through hole is used to communicate with the alarm control gas circuit of the anesthesia ventilator, when the elongated rod 16 is located at the first position, the integrated breathing circuit port 11 is blocked by the switching valve core 17, the through hole is located outside the sealing area of ​​the first sealing member 19 and the second sealing member 20, and the through hole is communicated with the outside, when the elongated rod 16 is located at the second position, the non-circulating breathing circuit port 12 is blocked by the switching valve core 17, and the through hole is located in the sealing area between the first sealing member 19 and the second sealing member 20;

[0028] The alarm control gas circuit of the anesthesia breathing machine is a breathing gas circuit connecting the user and the PEEP valve of the anesthesia breathing machine, and an alarm is issued when the alarm control gas circuit of the anesthesia breathing machine is connected to the outside world.

[0029] A gas flow direction switching device provided by the present invention enables, when the eccentric switching handle 15 is switched to a non-circulating breathing circuit, the breathing air circuit connecting the user and the PEEP valve loses positive pressure, causing the anesthesia ventilator to alarm. The anesthesia ventilator alarm is triggered mechanically, which greatly improves the reliability and safety of the surgical operation process. In addition, the mechanical triggering of the anesthesia ventilator alarm will not cause problems such as failure due to the cleaning of the anesthesia ventilator equipment, thereby improving the stability of the alarm. In addition, the alarm is realized by using the loss of positive pressure in the breathing air circuit connecting the user and the PEEP valve integrated in the anesthesia ventilator, which also reduces the cost of use.

[0030] Furthermore, a safety valve is included, which is sealed and connected to the housing 13, and is used to adjust the pressure of the gas flowing out of the integrated breathing circuit port 11. The safety valve ensures that the pressure of the gas flowing out of the integrated breathing circuit port 11 does not exceed the set value, ensures the stability of the gas flow switching device, and improves the reliability and safety of the surgical operation process.

[0031] Furthermore, an elastic member 21 is included, and the elastic member 21 is accommodated between the first sealing member 19 and the housing 13, and the elastic member 21 is a spring, so as to ensure the stability of the gas flow switching device when performing the switching operation, and improve the reliability and safety of the surgical operation process.

[0032] Furthermore, when the elongated rod 16 is located at the first position, a sealing groove 22 matching the first sealing member 19 is provided at a position on the first inner cavity that contacts the first sealing member 19. The sealing effect between the first sealing member 19 and the housing 13 can be improved to improve the stability of the gas flow switching device.

[0033] Furthermore, it also includes a PEEP valve-controlled gas hose connector 23, one end of which is fixed in the through hole, and the other end is connected to the alarm control gas circuit of the anesthesia ventilator through a hose.

[0034] Furthermore, the surface roughness Rz of the gas flow direction switching device is less than or equal to 4 μm. By treating the surface of the gas flow direction switching device to make its surface roughness less than or equal to 4 μm, its neutral salt spray corrosion resistance time reaches 72 hours, greatly improving its service life.

[0035] Furthermore, the first sealing member 19 and the second sealing member 20 are sealing rings to improve the sealing effect.

[0036] Furthermore, the eccentric switching handle 15 has a cam unit 14 , and the housing 13 has two cam limiting grooves 18 that can cooperate with the cam unit 14 to limit the eccentric switching handle 15 .

[0037] Furthermore, the cam unit 14 is pivotally connected to one end of the elongated rod 16 , and the cam unit 14 forms an eccentric cam around the pivotal position.

[0038] Furthermore, the alarm control gas circuit of the anesthesia ventilator includes a pressure collection unit for collecting the gas circuit pressure thereof, and the pressure collection unit is a pressure sensor arranged in the breathing gas circuit connecting the user and the PEEP valve.

[0039] The present invention also provides an anesthesia ventilator, comprising the above-mentioned gas flow direction switching device. The anesthesia ventilator provided by the present invention makes it possible for the respiratory gas circuit connecting the user and the PEEP valve to lose positive pressure when the eccentric switching handle 15 is switched to the non-circulating breathing circuit, causing the anesthesia ventilator to alarm, and the anesthesia ventilator alarm is triggered mechanically, which greatly improves the reliability and safety of the surgical operation process. In addition, the use of mechanical triggering of the anesthesia ventilator alarm will not cause malfunctions due to the cleaning of the anesthesia ventilator equipment, thereby improving the stability of the alarm.

[0040] In summary, the present invention provides a gas flow direction switching device for an anesthesia ventilator, comprising a gas inlet, an integrated breathing circuit port, a non-circulating breathing circuit port and a shell, wherein the gas inlet, the integrated breathing circuit port and the non-circulating breathing circuit port are interconnected in the shell, the gas flow direction switching device also comprises an eccentric switching handle, an elongated rod and a switching valve core, the shell has an inner cavity, the inner cavity comprises a first inner cavity and a second inner cavity which are interconnected, the eccentric switching handle is used to drive the elongated rod so that the elongated rod is in a first position or a second position, the other end of the elongated rod is fixedly connected to the switching valve core, the elongated rod is sleeved with a first sealing member, and the switching valve core is sleeved with a second sealing member, The shell is provided with a through hole connected with the first inner cavity, the through hole is used to communicate with the alarm control air circuit of the anesthesia ventilator, when the elongated rod is located at the first position, the integrated breathing circuit port is blocked by the switching valve core, the through hole is located outside the sealing area of ​​the first seal and the second seal, and the through hole is communicated with the outside world, when the elongated rod is located at the second position, the non-circulating breathing circuit port is blocked by the switching valve core, the through hole is located in the sealing area between the first seal and the second seal, the alarm control air circuit of the anesthesia ventilator is a breathing air circuit connecting the user and the PEEP valve of the anesthesia ventilator, and an alarm is issued when the alarm control air circuit of the anesthesia ventilator is connected with the outside world. When the eccentric switching handle is switched to a non-circulating breathing circuit, the breathing air circuit connecting the user and the PEEP valve loses positive pressure, causing the anesthesia ventilator to alarm. The anesthesia ventilator alarm is triggered mechanically, which greatly improves the reliability and safety of the surgical operation process. In addition, the mechanical triggering of the anesthesia ventilator alarm will not cause malfunctions due to the cleaning of the anesthesia ventilator equipment, thereby improving the stability of the alarm. In addition, the alarm is realized by using the loss of positive pressure in the breathing air circuit connecting the user and the PEEP valve integrated in the anesthesia ventilator, which also reduces the cost of use.

[0041] Furthermore, the surface roughness Rz of the gas flow direction switching device is ≤4 μm, which improves the neutral salt spray corrosion resistance, thereby increasing the life of the gas flow direction switching device and the reliability of the anesthesia ventilator.

[0042] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A gas flow direction switching device, used in an anesthesia ventilator, characterized in that: The invention comprises a gas inlet, an integrated breathing circuit port, a non-circulating breathing circuit port and a shell, wherein the gas inlet, the integrated breathing circuit port and the non-circulating breathing circuit port are interconnected in the shell, the gas flow direction switching device further comprises an eccentric switching handle, an elongated rod and a switching valve core, the shell has an inner cavity, the inner cavity comprises a first inner cavity and a second inner cavity that are interconnected, the eccentric switching handle is used to drive the elongated rod to make the elongated rod be in a first position or a second position, the other end of the elongated rod is fixedly connected to the switching valve core, the elongated rod is sleeved with a first sealing member, and the switching valve core is sleeved with a second sealing member; The shell is provided with a through hole in communication with the first inner cavity, the through hole is used to communicate with the alarm control gas circuit of the anesthesia ventilator, when the elongated rod is located at the first position, the integrated breathing circuit port is blocked by the switching valve core, the through hole is located outside the sealing area of ​​the first sealing member and the second sealing member, and the through hole is communicated with the outside, when the elongated rod is located at the second position, the non-circulating breathing circuit port is blocked by the switching valve core, and the through hole is located in the sealing area between the first sealing member and the second sealing member; The alarm control gas circuit of the anesthesia breathing machine is a breathing gas circuit connecting the user and the PEEP valve of the anesthesia breathing machine, and an alarm is issued when the alarm control gas circuit of the anesthesia breathing machine is connected to the outside world.

2. The gas flow direction switching device according to claim 1, characterized in that: It also includes a safety valve, which is sealed and connected to the shell, and is used to adjust the pressure of the gas flowing out of the integrated breathing circuit port.

3. The gas flow direction switching device according to claim 1, characterized in that: It also includes an elastic member, which is accommodated between the first sealing member and the housing.

4. The gas flow direction switching device according to claim 3, characterized in that: The elastic member is a spring.

5. The gas flow direction switching device according to claim 1, characterized in that: When the elongated rod is located at the first position, a sealing groove matching the first sealing member is provided at a position on the first inner cavity that contacts the first sealing member.

6. The gas flow direction switching device according to claim 1, characterized in that: It also includes a PEEP valve-controlled gas hose connector, one end of which is fixed in the through hole, and the other end is connected to the alarm control gas circuit of the anesthesia ventilator through a hose.

7. The gas flow direction switching device according to claim 1, characterized in that: The surface roughness of the gas flow direction switching device is Rz≤4μm.

8. The gas flow direction switching device according to claim 1, characterized in that: The eccentric switching handle has a cam unit, and the housing has two cam limiting grooves that can cooperate with the cam unit.

9. The gas flow direction switching device according to claim 8, characterized in that: The cam unit is pivotally connected to one end of the elongated rod, and the cam unit forms an eccentric cam around the pivotal position.

10. An anesthesia ventilator, characterized in that: It comprises a gas flow direction switching device as described in any one of claims 1 to 9.

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