Control valve for a breathing apparatus and breathing apparatus suitable for use by a human or animal

Abstract

The present application is suitable for the field of medical devices, and discloses a control valve of a breathing apparatus and a breathing apparatus suitable for human or animal use. The control valve of the breathing apparatus comprises a valve shell, a valve rod, a magnetic induction device and at least one first sealing element. The valve shell is enclosed to form a valve cavity, at least one inlet and at least one outlet. One end of the valve rod is arranged in the valve cavity, the other end is exposed outside the valve cavity and can move under the action of external force. The side wall of the valve rod and the inner wall of the valve cavity enclose at least one passage for connecting the inlet and the outlet. During the movement of the valve rod, the valve rod cooperates with the first sealing element and the valve cavity to control the opening and closing of the passage or adjust the opening size of the passage. The magnetic induction device is arranged outside the valve cavity to detect the magnetic field change caused by the movement of the valve rod around the valve cavity and output a feedback signal or feedback action. The present application improves the reliability of the control valve and is beneficial to reduce the size and cost of the control valve.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more particularly to a control valve for a respiratory device and a respiratory device having the control valve suitable for use in humans or animals. Background Technology

[0002] In the gas circuit systems of ventilators and anesthesia ventilators, it is necessary to monitor the status of certain control valves, such as the ACGO (Auxiliary Common Gas Outlet) control valve. In existing technologies, the status of control valves is monitored by actuating a limit switch via a valve stem. Both ends of the valve stem need to be exposed, one end for applying external force and the other for actuating the limit switch. This monitoring method, due to the physical contact, requires a certain structural strength from the valve stem, resulting in a relatively large valve stem size, which is detrimental to the miniaturization design of the control valve. Furthermore, the actuating end of the valve stem, which is exposed and in contact with the limit switch, is sensitive to environmental cleanliness, thus affecting the reliability of the control valve. In addition, to ensure the accuracy of position status monitoring, high dimensional precision is required for the valve stem, which also limits the valve stem structure, further increasing the manufacturing difficulty and cost of the control valve. Summary of the Invention

[0003] This invention provides a control valve for a breathing device, which aims to solve the technical problems of existing breathing devices that monitor different states of the control valve by triggering a limit switch with a valve stem, resulting in large valve body size, low reliability, high manufacturing difficulty, and high cost.

[0004] To achieve the above objectives, the present invention provides a control valve for a breathing device, comprising:

[0005] A valve housing, wherein the valve housing is a component made of a non-magnetic material, and the valve housing encloses a valve cavity, at least one inlet communicating with the valve cavity, and at least one outlet communicating with the valve cavity;

[0006] A valve stem, at least partially extending through the valve cavity and capable of movement under external force, wherein the sidewall of the valve stem and the inner wall of the valve cavity enclose at least one channel for connecting the inlet and the outlet.

[0007] At least one first seal is installed on the valve stem or the inner wall of the valve chamber to control the opening and closing of the passage;

[0008] A magnetic induction device is used to monitor the on / off state of the channel based on the movement of the valve stem.

[0009] This invention also provides a respiratory device suitable for human or animal use, including an airway system, wherein the airway system is provided with the control valve of the above-mentioned respiratory device.

[0010] The control valve for a breathing device and the breathing device suitable for human or animal use provided in this invention effectively monitor different states of the control valve by installing a magnetic induction device outside the valve cavity to detect changes in the magnetic field around the valve cavity caused by the movement of the valve stem, and outputting feedback signals or feedback actions representing the opening or closing of the channel or the size of the opening. Since the magnetic induction device detects changes in the magnetic field non-contactly, the valve stem does not need to be in direct contact with the magnetic induction device. Therefore, the valve stem does not need to have a trigger end exposed outside the valve shell and in contact with the magnetic induction device, which helps prevent external impurities from entering the valve cavity and causing abnormal valve function, thus effectively improving the reliability of the control valve. Simultaneously, using a non-contact magnetic induction method to monitor the state of the control valve prevents the magnetic induction device from directly contacting the fluid inside the control valve, thus preventing corrosion of the magnetic induction device by the fluid inside the control valve. Furthermore, since the valve stem does not need to physically contact the magnetic induction device, the structural strength and precision requirements of the valve stem can be reduced, allowing for a smaller valve stem design, which in turn facilitates miniaturization and reduces the cost of the control valve. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0012] Figure 1 This is a three-dimensional schematic diagram of the control valve of the breathing device provided in Embodiment 1 of the present invention;

[0013] Figure 2 yes Figure 1 A cross-sectional schematic diagram of AA in the middle;

[0014] Figure 3 This is an exploded view of the control valve of the breathing device provided in Embodiment 1 of the present invention;

[0015] Figure 4 This is a schematic diagram of the airway system provided in Embodiment 1 of the present invention connected to the patient;

[0016] Figure 5 This is a three-dimensional schematic diagram of the control valve of the breathing device provided in Embodiment 2 of the present invention;

[0017] Figure 6 yes Figure 5 Cross-sectional schematic diagram of BB;

[0018] Figure 7 This is a three-dimensional schematic diagram of the control valve of a breathing device provided in one embodiment of Embodiment 3 of the present invention;

[0019] Figure 8 yes Figure 7 A cross-sectional view of CC.

[0020] Figure 9 This is a three-dimensional schematic diagram of the control valve of a breathing device provided in another embodiment of the present invention (Embodiment 3).

[0021] Figure 10 This is a cross-sectional schematic diagram of the control valve of a breathing device provided in one embodiment of the fourth embodiment of the present invention;

[0022] Figure 11 This is a cross-sectional schematic diagram of the control valve of a breathing device provided in another embodiment of the present invention, which is also described in Embodiment 4 of the present invention.

[0023] Explanation of icon numbers:

[0024] 10. Pneumatic system; 100. Control valve; 110. Valve body; 111. Valve chamber; 112. Inlet; 113. Outlet; 114. Channel; 115. Mounting port; 116. Slot; 121. Valve stem; 1211. First stem body; 1212. Second stem body; 1213. First end; 1214. Second end; 122. Fourth elastic element; 123. First seal; 130. Third magnetic component; 140. Magnetic induction device; 141. Fourth magnetic component; 142. Third elastic element; 143. Second magnetic component; 144. Second elastic element; 145. First magnet; 146. First elastic element; 147. First magnetic sensor; 148. Second magnetic sensor; 149. Third magnetic sensor; 150. Second sealing element; 160. Limiting element; 170. First magnetic component; 200. Breathing drive device; 210. Bellows; 220. Folded bag; 300. Fresh gas delivery branch; 400. Internal circulation loop; 410. Inspiratory branch; 411. Inspiratory one-way valve; 412. Carbon dioxide absorption device; 420. Expiration branch; 421. Expiration one-way valve; 500. Drive gas branch; 20. Patient. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0026] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0027] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0028] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0029] Example 1:

[0030] like Figure 1-3As shown, the control valve 100 of the breathing device provided in Embodiment 1 of the present invention includes a valve housing 110, a valve stem 121, at least one first sealing element 123, and at least one magnetic induction device 140. The valve housing 110 encloses a valve cavity 111, at least one inlet 112 communicating with the valve cavity 111, and at least one outlet 113 communicating with the valve cavity 111. One end of the valve stem 121 passes through the valve cavity 111, and the other end protrudes outside the valve cavity 111 and can move under external force. The side wall of the valve stem 121 and the inner wall of the valve cavity 111 enclose at least one channel 114 for communicating the inlet 112 and the outlet 113. The first sealing element 123 is installed on the valve stem 121 or the inner wall of the valve cavity 111. During the movement of the valve stem 121… In this valve, the valve body 110 cooperates with at least one first seal 123 and the valve cavity 111 to control the opening and closing of the channel 114 between the inlet 112 and the outlet 113, or to adjust the opening size of the channel 114. A magnetic induction device 140 is disposed outside the valve body 110 to detect changes in the magnetic field around the valve cavity 111 and output a feedback signal or feedback action. The magnetic field change is caused by the movement of the valve stem 121. The feedback signal or feedback action represents the opening and closing of the channel 114 or the opening size of the channel 114, thereby enabling monitoring of the state of the control valve 100. Distributing the magnetic induction device 140 outside the valve cavity 111 prevents direct contact between the magnetic induction device 140 and the fluid inside the control valve 100, thus preventing corrosion of the magnetic induction device 140 by the fluid inside the control valve 100. Since the valve stem 121 does not need to directly contact the magnetic induction device 140, it eliminates the need for a trigger end that protrudes from the valve housing 110 and contacts the magnetic induction device 140. This helps prevent external impurities from entering the valve cavity 111 and causing malfunctions in the control valve 100, thus effectively improving the reliability of the control valve 100. Furthermore, because the valve stem 121 does not need to physically contact the magnetic induction device 140, the structural strength and precision requirements of the valve stem 121 can be reduced, allowing for a smaller design. This, in turn, facilitates the miniaturization of the control valve 100 and reduces its cost.

[0031] Preferably, in this embodiment, the valve stem 121 is a non-magnetic rod made of a non-magnetic material; the control valve 100 of the breathing device further includes a third magnetic component 130, which is disposed in the valve cavity 111 and mounted on the valve stem 121 and can move with the valve stem 121; the magnetic induction device 140 detects the position information of the valve stem 121 through the third magnetic component 130, thereby monitoring the state of the control valve 100. Specifically, the third magnetic component 130 and the magnetic induction device 140 form a pair of magnetic induction elements. The magnetic induction device 140 provides feedback on the on / off state or opening size of the channel based on the change in the magnetic field caused by the movement of the third magnetic component 130 with the valve stem 121. The third magnetic component 130 is disposed in the valve cavity 111, and the magnetic induction device 140 is disposed outside the valve cavity 111, and the two are isolated from each other, which helps to avoid the fluid inside the control valve 100 corroding the magnetic induction device 140.

[0032] In a preferred embodiment of this invention, the third magnetic component 130 is a magnet, and the magnetic induction device is a third magnetic sensor 149. When the magnet moves with the valve stem 121 to a position close to the third magnetic sensor 149, the third magnetic sensor 149 receives a magnetic induction signal and sends a feedback signal outward; when the magnet moves with the valve stem 121 away from the third magnetic sensor 149, the magnetic induction signal received by the third magnetic sensor 149 disappears, and it stops sending a feedback signal outward. Of course, in specific applications, as an alternative embodiment, the third magnetic component 130 can also be a magnetic component that can be attracted by a magnet, such as a metal component made of magnetic material.

[0033] Preferably, in this embodiment, when a first seal 123 blocks and seals a channel 114, the inlet 112 and outlet 113 connected through the channel 114 are disconnected, and fluid cannot flow from the inlet 112 to the outlet 113 through the channel 114; when the first seal 123 is removed from the channel 114 it blocks and seals, the inlet 112 and outlet 113 connected through the channel 114 are open, and fluid can flow from the inlet 112 to the outlet 113 through the channel 114. When the valve stem 121 moves to different positions, the first seal 123 and the channel 114 are in different engagement relationships, thereby controlling the opening and closing of the inlet 112 and the outlet 113, and thus realizing the control valve 100 to control the fluid flow state; since the third magnetic component 130 moves together with the valve stem 121, the magnetic induction device 140 can effectively monitor the state of the control valve 100. In this embodiment, the first seal 123 is used to control the opening and closing of the channel 114. Of course, in other alternative embodiments, the first seal 123 may simply change the opening size of the channel 114 to change the flow rate.

[0034] Preferably, the first seal 123 is mounted on the valve stem 121 and can move with the valve stem 121, which facilitates installation and subsequent maintenance and replacement of the first seal 123. Of course, in specific applications, as an alternative implementation, the first seal 123 can also be designed to be mounted on the inner wall of the valve cavity 111, that is, the first seal 123 can also be designed not to move with the valve stem 121.

[0035] Preferably, the control valve 100 of the breathing device further includes a limiting member 160 for fixing the third magnetic component 130 to the valve stem 121. The limiting member 160 is mainly used to axially limit the third magnetic component 130 to prevent relative movement between the third magnetic component 130 and the valve stem 121 during movement, which would affect the accuracy of the status monitoring results of the control valve 100. By using the limiting member 160 to limit the third magnetic component 130, the third magnetic component 130 can be quickly disassembled by removing the limiting member 160 later, which facilitates the maintenance and replacement of the third magnetic component 130. Of course, in specific applications, the installation and fixing method of the third magnetic component 130 on the valve stem 121 is not limited to this. For example, as an alternative implementation, the third magnetic component 130 can also be fixed to the valve stem 121 by adhesive bonding; of course, it is also possible for the third magnetic component 130 to be positioned on the valve stem 121 by both the limiting member 160 and adhesive bonding.

[0036] Preferably, the valve stem 121 includes a first rod body 1211 and a second rod body 1212 with an outer diameter smaller than that of the first rod body 1211. The third magnetic component 130 and the limiting component 160 are both sleeved on the second rod body 1212, with one end of the third magnetic component 130 abutting against the limiting component 160 and the other end abutting against the end face of the first rod body 1211 facing the second rod body 1212. Here, the side profile of the valve stem 121 is designed as a stepped shape, and the step formed between the first rod body 1211 and the second rod body 1212 axially limits one end of the third magnetic component 130, while the limiting component 160 axially limits the other end of the third magnetic component 130, thereby effectively limiting both ends of the third magnetic component 130 axially. Of course, in specific applications, as an alternative implementation, at least one limiting member 160 can be provided at each end of the third magnetic component 130 to abut and limit the third magnetic component 130, that is, the step surface on the valve stem 121 is not required to axially limit the third magnetic component 130.

[0037] Specifically, the limiting member 160 can be a connecting sleeve that is connected to the valve stem 121 via a threaded connection; or, the limiting member 160 can be a retaining ring installed on the valve stem 121. These two configurations ensure the reliability of the limiting member 160 in limiting the third magnetic component 130, while also making it easier to install and remove the third magnetic component 130 from the valve stem 121, thus facilitating later inspection and maintenance.

[0038] Preferably, the control valve 100 of the breathing device further includes a fourth elastic element 122, which is connected between the inner wall of the valve cavity 111 and the valve stem 121 to drive the valve stem 121 to reset. Under the action of external force, the valve stem 121 can compress the fourth elastic element 122 to move; after the external force is removed, the elastic restoring force of the fourth elastic element 122 can automatically drive the valve stem 121 to reset, which simplifies the control method of the control valve 100. Of course, in specific applications, as an alternative implementation, the reciprocating motion of the valve stem 121 can be driven by external force, that is, the fourth elastic element 122 can be omitted from driving the valve stem 121 to reset.

[0039] Preferably, the valve stem 121 has a first end 1213 that passes through the valve cavity 111 and a second end 1214 that protrudes from the valve cavity 111 for external force-driven movement. One end of the fourth elastic member 122 passes through the first end 1213 and abuts against the valve stem 121. The third magnetic member 130 is disposed near the first end 1213. The valve housing 110 also has a mounting port 115 that communicates with the valve cavity 111 for the first end 1213 to pass through the valve cavity 111. The first end 1213 is the end of the second rod 1212 that is away from the first rod 1211, and the second end 1214 is the end of the first rod 1211 that is away from the second rod 1212. In this embodiment, the fourth elastic element 122 is connected to the valve stem 121 in the following way: one end of the fourth elastic element 122 or from the first end 1213 passes through and abuts against the valve stem 121. The valve stem 121 is provided with a blind hole recessed from the first end 1213. This design can help improve the reliability of the installation and positioning of the fourth elastic element 122. Of course, in specific applications, as an alternative implementation, the fourth elastic element 122 may not pass through the valve stem 121, but may simply abut against the first end 1213.

[0040] Preferably, the fourth elastic element 122 is a helical spring; of course, in specific applications, as an alternative implementation, the fourth elastic element 122 can also be a spring sheet.

[0041] In specific applications, the external force used to drive the movement of the second end 1214 of the valve stem 121 can be provided by an electric drive mechanism, a manual drive mechanism, or a pneumatic drive mechanism.

[0042] Preferably, the control valve 100 of the breathing device further includes a second seal 150, which is used to seal the mounting port 115 and the valve stem 121. The second seal 150 is used to isolate the valve chamber 111 from the external environment, thereby preventing impurities in the external environment from entering the valve chamber 111 and affecting the reliability of the control valve 100.

[0043] Preferably, at least one of the inlet 112 and the outlet 113 has more than two. More preferably, one of the inlet 112 and the outlet 113 has two, and the other has one, and the number of magnetic induction devices 140 is one. As a preferred embodiment of this example, there is one inlet 112 and two outlets 113. Of course, in specific applications, the number of inlets 112, outlets 113, and magnetic induction devices 140 is not limited to this. For example, as a first alternative implementation, at least one of inlets 112 and outlets 113 is provided in more than two forms, and the number of inlets 112 and outlets 113 is the same, while the number of magnetic induction devices 140 is one; or, as a second alternative implementation, there are three or more inlets 112, one outlet 113, and the number of magnetic induction devices 140 is one less than the number of inlets 112; or, as a third alternative implementation, there is one inlet 112, three or more outlets 113, and the number of magnetic induction devices 140 is one less than the number of outlets 113; or, as a fourth alternative implementation, the number of inlets 112, outlets 113, and magnetic induction devices 140 is one each.

[0044] Preferably, the outer surface of the valve housing 110 is provided with a slot 116, and the third magnetic sensor 149 is at least partially inserted into and positioned within the slot 116. The slot 116 is machined on the outer surface of the valve housing 110, which facilitates manufacturing; and the insertion and positioning of the third magnetic sensor 149 within the slot 116 facilitates installation and removal, and also helps protect the third magnetic sensor 149. Of course, in specific applications, the third magnetic sensor 149 can also be installed on the valve housing 110 in other ways, such as by connecting it to the valve housing 110 with bolts or screws; or, the third magnetic sensor 149 can be directly threaded onto the valve housing 110.

[0045] Preferably, the valve housing 110 is a component made of a non-magnetic material. Of course, in specific applications, the valve housing 110 can also be made of a low-magnetic material.

[0046] In specific applications, the fluid entering the valve chamber 111 from the inlet 112 can be either gas or liquid.

[0047] Furthermore, referring to Figure 4As shown, this embodiment also provides a respiratory device suitable for human or animal use, including an airway system 1010, in which a control valve 100 of the aforementioned respiratory device is provided. The respiratory device suitable for human or animal use provided in this embodiment, due to the use of the aforementioned control valve 100, facilitates miniaturization of the respiratory device, improves its reliability, and reduces its manufacturing difficulty and cost.

[0048] Specifically, the gas system 10 includes an internal circulation loop 400, a breathing actuator 200, and a fresh gas delivery branch 300. The breathing actuator 200 and the fresh gas delivery branch 300 are respectively connected to the internal circulation loop 400. The internal circulation loop 400 includes an inspiratory branch 410 and an expiratory branch 420. The inspiratory branch 410 is equipped with an inspiratory one-way valve 411 and a carbon dioxide absorption device 412, and the expiratory branch 420 is equipped with an expiratory one-way valve 421. The fresh gas delivery branch 300 and the breathing actuator 200 are respectively connected to the internal circulation loop 400. The breathing actuator 200 is used to store the gas exhaled by the patient 20 and to drive the stored gas to be delivered to the patient 20. The fresh gas delivery branch 300 is used to deliver fresh gas to the internal circulation loop 400. The fresh gas can be oxygen or an anesthetic gas containing anesthetic.

[0049] Preferably, the breathing drive device 200 includes a bellows 210 and a pleated bag 220 disposed within the bellows 210. The airway system 10 also includes a drive gas branch 500 connected to the bellows 210, and an internal circulation loop 400 connected to the pleated bag 220. When the patient 20 inhales, the drive gas enters the bellows 210 from the drive gas branch 500, compresses the pleated bag 220, and pushes the gas stored in the pleated bag 220 to the inspiratory branch 410. After merging with the fresh gas delivered by the fresh gas delivery branch 300, the gas is delivered to the patient 20 through the inspiratory one-way valve 411. When the patient 20 exhales, the gas exhaled by the patient 20 is delivered to the pleated bag 220 through the expiratory one-way valve 421, which lifts the pleated bag 220. Of course, in specific applications, as an alternative implementation, the breathing drive device 200 can also be a manual bladder, or the breathing drive device 200 can also include a combination of bellows 210 and folded bladder 220 and a manual bladder, which can be selectively connected to the internal circulation loop 400 through a reversing valve, thereby allowing switching between motorized ventilation mode and manual ventilation mode.

[0050] In specific applications, the aforementioned control valve 100 can be installed in at least one of the inhalation branch 410, the exhalation branch 420, the fresh gas delivery branch 300, and the driving gas branch 500.

[0051] In a preferred embodiment of this invention, the control valve 100 is an ACGO (Auxiliary Common Gas Outlet) control valve. The valve body 110 has one inlet 112 and two outlets 113. The inlet 112 is connected to the fresh gas delivery branch 300, one outlet 113 is connected to the intake branch 410 of the internal circulation loop 400, and the other outlet 113 is used as an auxiliary gas outlet.

[0052] Specifically, the aforementioned respiratory equipment suitable for human or animal use can be a ventilator suitable for human or animal use, or it can be an anesthesia ventilator suitable for human or animal use.

[0053] Example 2:

[0054] Reference Figure 2 , Figure 5 and Figure 6 As shown, the control valve of the breathing device and the breathing device suitable for human or animal use provided in this embodiment differ from that in Embodiment 1 mainly in the different configuration scheme of the magnetic induction device 140. Specifically, in Embodiment 1, the magnetic induction device 140 is a third magnetic sensor 149; while in this embodiment, the magnetic induction device 140 includes a fourth magnetic component 141 and a third elastic component 142.

[0055] Specifically, in this embodiment, one of the third magnetic component 130 and the fourth magnetic component 141 is a magnet, and the other is a magnet or a magnetic component that can be attracted by a magnet. When the third magnetic component 130 moves with the valve stem 121 to a position close to the fourth magnetic component 141, the fourth magnetic component 141 is attracted by the third magnetic component 130 and compresses the third elastic member 142 to move. When the third magnetic component 130 moves with the valve stem 121 to a position away from the fourth magnetic component 141, the magnetic force on the fourth magnetic component 141 disappears, and the elastic restoring force of the third elastic member 142 drives the fourth magnetic component 141 to reset. Using the scheme of this embodiment, the third magnetic component 130 and the magnetic induction device 140 can also form a pair of magnetic induction elements. The magnetic induction device 140 can also respond to the opening and closing of the channel 114 or the opening size of the channel 114 according to the change in the magnetic field around the valve cavity 111 caused by the movement of the valve stem 121. Furthermore, since the third magnetic component 130 is located inside the valve cavity 111 and the magnetic induction device 140 is located outside the valve cavity 111, the two are isolated from each other, which helps to prevent the fluid inside the control valve 100 from corroding the magnetic induction device 140.

[0056] Apart from the differences mentioned above, the control valve 100 of the breathing device provided in this embodiment and other parts of the breathing device suitable for human or animal use can be optimized with reference to Embodiment 1, and will not be described in detail here.

[0057] Example 3:

[0058] Reference Figure 2 and Figure 5-9 As shown, the control valve of the breathing device and the breathing device suitable for human or animal use provided in this embodiment differ from Embodiment 1 and Embodiment 2 mainly in the different schemes for forming a pair of magnetic induction elements. Specifically, in Embodiment 1 and Embodiment 2, the scheme for forming a pair of magnetic induction elements is to install a third magnetic component 130 inside the valve cavity 111 and on the valve stem 121, and to set a magnetic induction device 140 outside the valve cavity 111; while in this embodiment, the scheme for forming a pair of magnetic induction elements is to set a first magnetic component 170 and a magnetic induction device 140 on both sides of the valve stem 121 outside the valve cavity 111.

[0059] Specifically, in this embodiment, the valve stem 121 is also a non-magnetic rod made of non-magnetic material;

[0060] The control valve of the breathing device also includes a first magnetic component 170, which is located outside the valve cavity 111. The first magnetic component 170 and the magnetic induction device 140 are respectively located on both sides of the valve stem 121, and the first magnetic component 170 and the magnetic induction device 140 form a magnetic gap.

[0061] The valve stem 121 has at least a first working position and a second working position. When the valve stem 121 is in the first working position, the valve stem 121 has an isolation portion that passes through the magnetic gap and isolates the magnetic induction lines of the first magnetic component 170 and the magnetic induction device 140.

[0062] When the valve stem 121 is in the second working position, the valve stem 121 is located outside the magnetic gap so that the magnetic induction lines of the first magnetic component 170 and the magnetic induction device 140 are connected.

[0063] In a preferred embodiment of this invention, the first magnetic component 170 is a magnet or a magnetic component that can be attracted by a magnet, and the magnetic induction device 140 is a second magnetic sensor 148.

[0064] As another preferred embodiment of this invention, the magnetic induction device 140 includes a second magnetic component 143 and a second elastic component 144;

[0065] One of the first magnetic component 170 and the second magnetic component 143 is a magnet, the other is a magnet, or a magnetic component that can be attracted by a magnet.

[0066] When the valve stem 121 is in the second working position, the second magnetic component 143 is attracted by the first magnetic component and compresses the second elastic component 144; when the valve stem 121 moves from the second working position to the first working position, the second elastic component 144 drives the second magnetic component 143 to reset.

[0067] In this embodiment, the first magnetic component 170 and the magnetic induction device 140 can also form a pair of magnetic induction elements. The magnetic induction device 140 can also respond to the change in the magnetic field around the valve cavity 111 caused by the movement of the valve stem 121, and provide feedback on the opening and closing of the channel 114 or the size of the opening of the channel 114. Furthermore, since both the first magnetic component 170 and the magnetic induction device 140 are located outside the valve cavity 111 and are isolated from the valve stem 121, it helps to prevent the fluid inside the control valve 100 from corroding the magnetic induction device 140 and the first magnetic component 170.

[0068] Apart from the differences mentioned above, the control valve 100 of the breathing device provided in this embodiment and other parts of the breathing device suitable for human or animal use can be optimized with reference to Embodiment 1, and will not be described in detail here.

[0069] Example 4:

[0070] Reference Figure 2 , Figure 10 and Figure 11 As shown, the control valve of the breathing device and the breathing device suitable for human or animal use provided in this embodiment differ from Embodiments 1, 2, and 3 mainly in whether the valve stem 121 is magnetic and the scheme for forming a pair of magnetic induction elements. Specifically, in Embodiments 1 to 3, the valve stem 121 is a non-magnetic rod and requires an additional magnetic component to form a pair of magnetic induction elements with the magnetic induction device 140; while in this embodiment, the valve stem 121 is a magnetic rod made of magnetic material, and the magnetic induction device 140 directly forms a pair of magnetic induction elements with the valve stem 121.

[0071] In a preferred embodiment of this invention, the magnetic induction device 140 is a first magnetic sensor 147.

[0072] As another preferred embodiment of this example, the magnetic induction device 140 includes a first magnet 145 and a first elastic member 146. When the valve stem 121 moves to a position close to the first magnet 145, the first magnet 145 is attracted by the valve stem 121 and compresses the first elastic member 146 to move. When the valve stem 121 moves to a position away from the first magnet 145, the first elastic member 146 drives the first magnet to reset.

[0073] In this embodiment, the valve stem 121 and the magnetic induction device 140 can form a pair of magnetic induction elements. The magnetic induction device 140 can also respond to the opening and closing of the channel 114 or the size of the opening of the channel 114 based on the change in the magnetic field around the valve cavity 111 caused by the movement of the valve stem 121. Furthermore, since the part of the valve stem 121 that triggers the magnetic induction device 140 is located inside the valve cavity, and the magnetic induction device 140 is located outside the valve cavity 111, the two are isolated from each other, thereby helping to avoid the fluid inside the control valve 100 from corroding the magnetic induction device 140.

[0074] Apart from the differences mentioned above, the control valve 100 of the breathing device provided in this embodiment and other parts of the breathing device suitable for human or animal use can be optimized with reference to Embodiment 1, and will not be described in detail here.

[0075] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A control valve for a breathing device, characterized in that: include: A valve housing, the valve housing enclosing a valve cavity, at least one inlet communicating with the valve cavity, and at least one outlet communicating with the valve cavity; A valve stem, one end of which passes through the valve cavity and the other end of which protrudes outside the valve cavity and is capable of moving under the action of external force, and the enclosure of the valve stem and the valve cavity forms at least one channel for connecting the inlet and the outlet; At least one first seal is mounted on the valve stem or the inner wall of the valve chamber; During its movement, the valve stem cooperates with at least one first seal and the valve chamber to control the opening and closing of the channel or adjust the size of the channel opening. A magnetic induction device is disposed outside the valve cavity to detect changes in the magnetic field around the valve cavity formed by the valve shell and output a feedback signal or feedback action. The changes in the magnetic field are caused by the movement of the valve stem located inside the valve cavity. The feedback signal or feedback action represents the opening or closing of the channel or the size of the opening. The valve stem is a non-magnetic rod made of non-magnetic material. The control valve of the breathing device also includes a first magnetic component. The first magnetic component is located outside the valve cavity. The first magnetic component and the magnetic induction device are respectively located on both sides of the valve stem located inside the valve cavity. The first magnetic component and the magnetic induction device form a magnetic gap to detect the change in the magnetic field around the valve cavity caused by the movement of the valve stem inside the valve cavity. The valve stem has at least a first working position and a second working position. When the valve stem is in the first working position, the valve stem has an isolation portion that passes through the magnetic gap and isolates the magnetic induction lines of the first magnetic component and the magnetic induction device. When the valve stem is in the second working position, the valve stem is located outside the magnetic spacing so that the magnetic induction lines of the first magnetic component and the magnetic induction device are connected.

2. The control valve of the breathing device as described in claim 1, characterized in that: The first magnetic component is a magnet or a magnetic component that can be attracted by a magnet, and the magnetic induction device is a second magnetic sensor.

3. The control valve of the breathing device as described in claim 1, characterized in that: The magnetic induction device includes a second magnetic component and a second elastic component; One of the first magnetic component and the second magnetic component is a magnet, and the other is a magnet or a magnetic component that can be attracted by a magnet; When the valve stem is in the second working position, the second magnetic component is attracted by the first magnetic component and compresses the second elastic component; when the valve stem moves from the second working position to the first working position, the second elastic component drives the second magnetic component to reset.

4. The control valve of the breathing device as described in any one of claims 1 to 3, characterized in that: The control valve of the breathing device also includes a fourth elastic element, which is connected between the inner wall of the valve cavity and the valve stem to drive the valve stem to reset.

5. The control valve of the breathing device as described in claim 4, characterized in that: The valve stem has a first end that passes through the valve cavity and a second end that protrudes outside the valve cavity for being driven by an external force. One end of the fourth elastic member abuts against the first end or passes through the first end and abuts against the valve stem. The valve housing also has an installation port that communicates with the valve cavity for the first end to pass through the valve cavity.

6. The control valve of the breathing device as described in claim 5, characterized in that: The control valve of the breathing device also includes a second seal for sealing the mounting port and the valve stem.

7. The control valve of the breathing device as described in any one of claims 1 to 3, characterized in that: At least one of the imports and the exports has more than two.

8. The control valve of the breathing device as described in claim 7, characterized in that: One of the inlet and the outlet has two, and the other has one; the number of magnetic induction devices is one; or... The number of inlets and outlets are the same, and the number of magnetic induction devices is one; or... The inlet has three or more, the outlet has one, and the number of magnetic induction devices is one less than the number of inlets; or... There is one inlet and three or more outlets, and the number of magnetic induction devices is one less than the number of outlets.

9. The control valve of the breathing device as described in any one of claims 1 to 3, characterized in that: The number of imports, the number of exports, and the number of magnetic induction devices are all one.

10. A respiratory device suitable for human or animal use, comprising an airway system, characterized in that: The airway system is provided with a control valve for the breathing device as described in any one of claims 1 to 9.

11. The breathing device as described in claim 10, characterized in that: The gas path system includes a driving gas branch, an internal circulation loop, a fresh gas delivery branch, and a breathing drive device. The fresh gas delivery branch and the breathing drive device are respectively connected to the internal circulation loop. The driving gas branch is connected to the breathing drive device to drive the breathing drive device to operate. The valve housing has one inlet and two outlets. The inlet is connected to the fresh gas delivery branch, one outlet is connected to the internal circulation loop, and the other outlet is used as an auxiliary gas outlet.

12. The breathing device as described in claim 10 or 11, characterized in that: The respiratory equipment includes ventilators suitable for human or animal use.

13. The breathing device as described in claim 10 or 11, characterized in that: The respiratory equipment includes anesthesia ventilators suitable for human or animal use.

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