Fluidic on-off bodies and components, housings and devices, ventilation therapy apparatus and oxygen supply control methods

Abstract

The application relates to the technical field of fluid on-off, and discloses a fluid on-off body and components, a shell and a device, a ventilation treatment device and an oxygen supply control method. The fluid on-off body comprises a sliding plate and a flexible connecting piece, wherein the flexible connecting piece is connected to the sliding plate, the flexible connecting piece is used for being connected to a first passage wall of a first fluid passage of a fluid on-off device, and the sliding plate is used for being capable of moving under the pressure drive of fluid in the first fluid passage to drive the flexible deformation of the flexible connecting piece. The fluid on-off body is simple in structure, can safely and reliably drive the on-off piece to on-off fluid in actual use, and can significantly improve the safety of oxygen supply of the ventilation treatment device when applied in the ventilation treatment device.

Description

Technical Field

[0001] This invention relates to the field of fluid on / off technology, specifically to a fluid on / off body, a fluid on / off component, a fluid on / off housing, a fluid on / off device, an oxygen supply control method, and a ventilation therapy device. Background Technology

[0002] Currently, ventilation therapy equipment is a crucial medical device for maintaining breathing, ensuring ventilation, saving and prolonging the lives of patients with respiratory failure. It is also an effective method to replace manual spontaneous ventilation and is widely used in respiratory failure caused by various reasons, anesthetic respiratory management during major surgery, respiratory support therapy, and emergency resuscitation.

[0003] In ventilation therapy equipment, the oxygen source is connected to a flow meter, which is located outside the ventilation therapy equipment. By adjusting the knob on the flow meter, the oxygen supply of the whole machine can be turned on and off, and the oxygen flow rate can be set.

[0004] In actual use, if the operator forgets to turn off the external oxygen supply after the machine is finished, or if the machine malfunctions and stops during use, the external oxygen supply will continue to supply oxygen to the machine if the flow meter is not turned off. This not only wastes oxygen but can also cause other accidents. If the machine catches fire, the risk of not being able to turn off the oxygen supply will be even more serious. Summary of the Invention

[0005] In a first aspect, the present invention provides a fluid switching body with a simple structure that can reliably and safely switch fluid in practical use. For example, when applied in a ventilation therapy device, it can significantly improve the safety of oxygen supply in the ventilation therapy device.

[0006] To achieve the above objectives, the present invention provides a fluid switching body, which includes a sliding plate and a flexible connector. The flexible connector is connected to the sliding plate and is used to connect to the first channel wall of the first fluid channel of the fluid switching device. The sliding plate is movable under the pressure of the fluid in the first fluid channel to drive the flexible connector to deform flexibly.

[0007] In this technical solution, since the flexible connector is used to connect to the first channel wall of the first fluid channel of the fluid switching device, and the sliding plate is able to move under the pressure of the fluid in the first fluid channel to drive the flexible connector to deform flexibly, in actual use, the fluid switching device can connect the flexible connector to the first channel wall of the first fluid channel of the fluid switching device, and the switching element can be connected to the sliding plate. The switching element can extend from the first fluid channel of the fluid switching device into the second fluid channel isolated from the first fluid channel and can move. In this way, when the first fluid is not supplied through the first fluid channel, the switching element can cut off the flow in the second fluid channel to stop the supply of the second fluid. When the first fluid is supplied through the first fluid channel, the first fluid will apply pressure to the sliding plate. Under the flexible deformation of the flexible connector, the pressure of the first fluid on the sliding plate will drive the sliding plate to move, thereby driving the switching element to move to open the second fluid channel, so that the second fluid channel can supply the second fluid. In this way, the supply of the second fluid can be controlled by whether the first fluid is supplied, thereby improving the safety and reliability of the second fluid supply. For example, when applied to ventilation therapy equipment, the first fluid can be the airflow supplied by the fan, and the second fluid can be the oxygen supplied by the oxygen source. This can avoid oxygen waste and significantly improve the safety of oxygen use in ventilation therapy equipment.

[0008] In addition, the flexible connector is an annular flexible connector and is connected to the four edges of the sliding plate; and / or, the flexible connector is an elastic skirt.

[0009] Additionally, the flexible connector is used to connect to the edge of the opening formed on the first channel wall, so that the fluid flow cut-off body is part of the channel wall of the first channel wall.

[0010] Additionally, the flexible connector includes a U-shaped wall for extending into the first fluid channel.

[0011] In addition, the flexible connector is connected to a connector body around its four edges, and a radial groove is formed on the outer peripheral surface of the connector body.

[0012] In a second aspect, the present invention provides a fluid switching component, which includes a switching element and any of the fluid switching bodies described in the first aspect above, wherein the switching element and the sliding plate are connected; wherein the switching element is configured to extend from a first fluid channel of the fluid switching device into a second fluid channel isolated from the first fluid channel within the fluid switching device and is movable; wherein the switching element is configured to cut off the flow in the second fluid channel, and the sliding plate is configured to move under the pressure of the fluid in the first fluid channel to drive the switching element to move and allow the flow in the second fluid channel.

[0013] Thus, as described in the first aspect above, in practical use, the flexible connector can be attached to the first channel wall of the first fluid channel of the fluid switching device. The switching element can extend from the first fluid channel into a second fluid channel within the fluid switching device, isolated from the first fluid channel, and can move. When the first fluid is not supplied through the first fluid channel, the switching element can cut off the flow in the second fluid channel to stop the supply of the second fluid. When the first fluid is supplied through the first fluid channel, the first fluid will exert pressure on the sliding plate. Under the flexible deformation of the flexible connector, the pressure exerted by the first fluid on the sliding plate will drive the sliding plate to move, thereby moving the switching element to open the second fluid channel, allowing the second fluid to be supplied. In this way, the supply of the second fluid can be controlled by whether the first fluid is supplied, thereby improving the safety and reliability of the second fluid supply. For example, when applied to ventilation therapy equipment, the first fluid can be the airflow supplied by the fan, and the second fluid can be the oxygen supplied by the oxygen source. This avoids oxygen waste and significantly improves the safety of oxygen use in ventilation therapy equipment.

[0014] Furthermore, the switch is connected at the center of the sliding plate; and / or, the switch and the sliding plate are detachably connected.

[0015] Thirdly, the present invention provides a fluid flow control housing, wherein an isolated first fluid channel and a second fluid channel are provided inside the fluid flow control housing, wherein a first channel wall of the first fluid channel is used to connect a flexible connector of any of the fluid flow control components described in the second aspect above; an opening is formed on the first channel wall, and the edge of the opening is used to connect a flexible connector of any of the fluid flow control components described in the second aspect above, such that the fluid flow control body of any of the fluid flow control components described in the second aspect above serves as a part of the channel wall of the first channel wall.

[0016] In practical use, the fluid switching housing can connect the flexible connector of any of the fluid switching components described in the second aspect above to the edge of the open opening. Thus, the fluid switching body serves as part of the first channel wall, while the switching component can extend from the first fluid channel of the fluid switching device into the second fluid channel within the fluid switching device, which is isolated from the first fluid channel, and can move. When the first fluid is not supplied through the first fluid channel, the switching component can cut off the flow in the second fluid channel to stop the supply of the second fluid. When the first fluid is supplied through the first fluid channel, the first fluid will exert pressure on the sliding plate. Under the flexible deformation of the flexible connector, the pressure exerted by the first fluid on the sliding plate will drive the sliding plate to move, thereby moving the switching component to open the second fluid channel, allowing the second fluid to be supplied. Thus, the supply of the second fluid can be controlled by whether the first fluid is supplied, thereby improving the safety and reliability of the second fluid supply. For example, when applied to ventilation therapy equipment, the first fluid can be the airflow supplied by the fan, and the second fluid can be the oxygen supplied by the oxygen source. This can avoid oxygen waste and significantly improve the safety of oxygen use in ventilation therapy equipment.

[0017] Furthermore, the common channel wall between the first fluid channel and the second fluid channel includes a through channel for installing the on / off element of any of the fluid on / off components described in the second aspect above.

[0018] Fourthly, the present invention provides a fluid switching device, comprising: a fluid switching housing, wherein an isolated first fluid channel and a second fluid channel are disposed within the fluid switching housing; and a fluid switching component, wherein the fluid switching component includes a fluid switching body and a switching element, the fluid switching body being movably disposed in the first fluid channel, the switching element being connected to the fluid switching body, the switching element extending from the first fluid channel into the second fluid channel and being movable; wherein, when the pressure on the fluid switching body within the first fluid channel is less than the active pressure that causes the fluid switching body to move, the switching element cuts off the flow in the second fluid channel; wherein, when the pressure on the fluid switching body exerted by a first fluid within the first fluid channel is greater than the active pressure, the fluid switching body is movable and drives the switching element to move to allow flow in the second fluid channel.

[0019] In this technical solution, the fluid switching element is movably disposed in the first fluid channel. The switching element and the fluid switching element are connected. The switching element extends from the first fluid channel into the second fluid channel and is movable. When the pressure on the fluid switching element within the first fluid channel is less than the operating pressure that causes the fluid switching element to move (e.g., when the first fluid is no longer supplied), the switching element cuts off the flow in the second fluid channel, stopping the supply of the second fluid. Conversely, when the first fluid is supplied, and the pressure exerted on the fluid switching element within the first fluid channel is greater than the operating pressure, the fluid switching element can move and drive the switching element to open the second fluid channel to supply the second fluid. Thus, the supply of the second fluid can be controlled by whether the first fluid is supplied, thereby improving the safety and reliability of the second fluid supply. For example, when this fluid switching device is applied in a ventilation therapy device, the first fluid can be the airflow supplied by the fan, and the second fluid can be the oxygen supplied by the oxygen source. This avoids oxygen waste and significantly improves the safety of oxygen use in the ventilation therapy device.

[0020] In addition, the fluid switching body is part of the first channel wall of the first fluid channel.

[0021] In addition, the fluid switching device includes an elastic element. When the pressure in the first fluid channel on the fluid switching body is less than the active pressure that causes the fluid switching body to move, the elastic element can apply an elastic preload to the switching element so that the switching element cuts off the flow in the second fluid channel.

[0022] Furthermore, the fluid switching body includes the elastic element.

[0023] Furthermore, the fluid switching component is any of the fluid switching components described in the second aspect above, wherein the flexible connector is connected to the first channel wall of the first fluid channel.

[0024] Furthermore, when the flexible connector is an elastic skirt, the elastic skirt serves as the elastic element.

[0025] In addition, the fluid access control housing is any of the fluid channel housings described in the third aspect above, wherein the flexible connector is connected to the edge of the opening so that the fluid access control body serves as part of the channel wall of the first channel wall.

[0026] Furthermore, the flexible connector includes a U-shaped wall that extends into the first fluid channel, with the opening of the U-shaped wall facing outwards from the first fluid channel.

[0027] In addition, the elastic element is disposed between the second channel wall of the second fluid channel and the on / off segment of the on / off element that extends into the second fluid channel.

[0028] In addition, the common channel wall between the first fluid channel and the second fluid channel includes a guide mounting cylinder with a through channel, and the switch is axially movable through the guide mounting cylinder.

[0029] Furthermore, the guide mounting cylinder includes a first section extending into the first fluid channel and a second section extending into the second fluid channel.

[0030] Furthermore, the fluid switching device includes an elastic element, which is sleeved on the switching element and abuts against the stop flange inside the guide mounting cylinder. When the pressure in the first fluid channel on the fluid switching body is less than the active pressure that causes the fluid switching body to move, the elastic element can apply an elastic preload to the switching element so that the switching element cuts off the flow in the second fluid channel.

[0031] In addition, in the direction of fluid flow, the first fluid channel is provided with a first fluid discharge check valve located downstream of the on / off element and the fluid on / off body.

[0032] In addition, the second fluid channel is provided with a sealing cylinder having a fluid inlet. The internal flow channel of the sealing cylinder is a part of the fluid channel segment. The switching element can be pressed against the end face of the cylinder opening of the sealing cylinder to block the fluid inlet, and / or the switching element can extend into the sealing cylinder to block the fluid inlet, so as to cut off the flow of the second fluid channel.

[0033] Furthermore, the fluid inlet includes an inner diameter tapering section, and the on / off element includes an outer diameter tapering plug that mates with the inner diameter tapering section.

[0034] In addition, a fluid mixing channel is provided inside the fluid switching housing, and the outlet ends of the first fluid channel and the second fluid channel are connected to the fluid mixing channel.

[0035] In addition, the first fluid channel serves as an air delivery channel, and the inlet end of the first fluid channel serves as a fan connection end, while the second fluid channel serves as an oxygen delivery channel.

[0036] Fifthly, the present invention provides an oxygen supply control method for controlling the oxygen supply of a ventilation therapy device. The oxygen supply control method includes: movably installing an oxygen valve in an oxygen supply channel and an air supply channel connected to a fan; when the ventilation therapy device is turned on and the fan is running, the airflow provided by the fan applies pressure to the oxygen valve, causing the oxygen valve to open the oxygen supply channel to supply oxygen; when the ventilation therapy device is turned off, or when the fan malfunctions or the circuit malfunctions and the fan stops running during the operation of the ventilation therapy device, causing the oxygen valve to close the oxygen supply channel to stop supplying oxygen.

[0037] In this way, by activating oxygen valves in the oxygen supply channel and the air supply channel connected to the fan, and by applying pressure through the airflow supplied by the fan, the oxygen supply can be stably and reliably controlled, thereby avoiding oxygen waste and significantly improving the safety of oxygen use in ventilation therapy equipment.

[0038] Furthermore, when the ventilation therapy equipment is shut down, or when the fan or circuit malfunctions during the operation of the ventilation therapy equipment, causing the fan to stop running, the oxygen valve can close the oxygen supply channel to stop supplying oxygen under the elastic restoring force of the elastic element.

[0039] Sixthly, the present invention provides a ventilation therapy device, which includes a fan and any of the fluid on / off devices described in the fourth aspect above, wherein the first fluid channel serves as an air delivery channel, and the inlet end of the first fluid channel is connected to the outlet end of the fan, and the second fluid channel serves as an oxygen delivery channel. Thus, as described above, the safety of oxygen use in this ventilation therapy device is significantly improved.

[0040] Alternatively, the ventilation therapy device can implement any of the oxygen supply control methods described in the fifth aspect above. Thus, as mentioned above, the safety of oxygen use in this ventilation therapy device is significantly improved.

[0041] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0042] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings:

[0043] Figure 1 This is a schematic diagram of the structure of the first fluid switching device provided in a specific embodiment of the present invention, wherein the switching element cuts off the flow of the second fluid channel;

[0044] Figure 2 yes Figure 1 A schematic diagram of a fluid switching device in which the switching element allows flow through the second fluid channel;

[0045] Figure 3 This is a schematic diagram of the structure of the second fluid switching device provided in a specific embodiment of the present invention, wherein the switching element cuts off the flow of the second fluid channel;

[0046] Figure 4 yes Figure 3 A schematic diagram of a fluid switching device in which the switching element allows flow through the second fluid channel;

[0047] Figure 5 This is a schematic diagram of the structure of the third fluid switching device provided in a specific embodiment of the present invention, wherein the switching element cuts off the flow in the second fluid channel;

[0048] Figure 6 yes Figure 5 A schematic diagram of a fluid switching device in which the switching element allows flow through the second fluid channel;

[0049] Figure 7 This is a schematic diagram of the structure of the fourth fluid switching device provided in a specific embodiment of the present invention, wherein the switching element cuts off the flow in the second fluid channel;

[0050] Figure 8 yes Figure 7 A schematic diagram of a fluid switching device in which the switching element allows flow through the second fluid channel;

[0051] Figure 9 This is a schematic diagram of the fifth fluid switching device provided in a specific embodiment of the present invention, wherein the switching element cuts off the flow in the second fluid channel;

[0052] Figure 10 yes Figure 9 A schematic diagram of a fluid switching device in which the switching element allows flow through the second fluid channel;

[0053] Figure 11 This is a schematic diagram of the sixth fluid switching device provided in a specific embodiment of the present invention, wherein the switching element cuts off the flow in the second fluid channel;

[0054] Figure 12 yes Figure 11 A schematic diagram of a fluid switching device in which the switching element allows flow through the second fluid channel;

[0055] Figure 13 This is a schematic diagram of a ventilation therapy device provided by a specific embodiment of the present invention in actual use.

[0056] Explanation of reference numerals in the attached figures

[0057] 1-First fluid channel, 2-Second fluid channel, 3-Fluid on / off housing, 4-Fluid on / off body, 5-On / off component, 6-Elastic component, 7-Sliding plate, 8-Elastic skirt, 9-U-shaped wall, 10-Slot, 11-First channel wall, 12-Second channel wall, 13-Connector, 14-Ocean edge, 15-On / off section, 16-Common channel wall, 17-Guide mounting cylinder, 18-First fluid discharge check valve, 19-Fluid inlet, 20-Blocking cylinder, 21-First cylinder section, 22-Second cylinder section, 23-Inner diameter tapering section, 24-Outer diameter tapering plug, 25-Fluid mixing channel, 26-Fan connection end, 27-Fan, 28-Fluid on / off device. Detailed Implementation

[0058] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0059] refer to Figures 1-12 The six different embodiments shown, in the first aspect, the fluid switching body 4 provided by the present invention, for example a pressure-bearing movable member, includes a sliding plate 7 and a flexible connector, wherein the flexible connector is connected to the sliding plate 7, the flexible connector is used to connect to the first channel wall 11 of the first fluid channel 1 of the fluid switching device, and the sliding plate 7 is used to move under the pressure of the fluid in the first fluid channel 1 to drive the flexible connector to deform flexibly.

[0060] Since the flexible connector is used to connect to the first channel wall 11 of the first fluid channel 1 of the fluid switching device, and the sliding plate 7 is able to move under the pressure of the fluid in the first fluid channel 1 to drive the flexible connector to deform flexibly, in actual use, the fluid switching body 4 can connect the flexible connector to the first channel wall 11 of the first fluid channel 1 of the fluid switching device, and the switching element 5 can be connected to the sliding plate 7. The switching element 5 can extend from the first fluid channel 1 of the fluid switching device into the second fluid channel 2, which is isolated from the first fluid channel 1, and can be flexibly connected. In this way, when the first fluid is not supplied through the first fluid channel 1, the switching element 5 can cut off the flow in the second fluid channel 2 to stop the supply of the second fluid. When the first fluid is supplied through the first fluid channel 1, the first fluid will exert pressure on the sliding plate 7. Under the flexible deformation of the flexible connector, the pressure exerted by the first fluid on the sliding plate 7 will drive the sliding plate 7 to move, thereby driving the switching element 5 to move and open the second fluid channel, so that the second fluid channel can supply the second fluid. In this way, the supply of the second fluid can be controlled by whether the first fluid is supplied, thereby improving the safety and reliability of the second fluid supply. For example, when applied to ventilation therapy equipment, the first fluid can be the airflow supplied by the fan, and the second fluid can be the oxygen supplied by the oxygen source. This can avoid oxygen waste and significantly improve the safety of oxygen use in ventilation therapy equipment.

[0061] The flexible connector can have various structural forms. For example, the flexible connector can be a flexible strip, one end of which can be connected to the sliding plate 7 in its length direction, and the other end of which can be connected to the first channel wall 11. Alternatively, the flexible strip can be arranged along the circumferential direction of the sliding plate 7, that is, the flexible strip extends circumferentially and is connected to the edge of the sliding plate 7.

[0062] Alternatively, in an alternative embodiment, the flexible connector is an annular flexible connector and is connected to the four edges of the sliding plate 7. In this way, the flexible connector can flexibly deform in the entire circumferential direction of the sliding plate 7, so that the movement of the sliding plate 7 is more balanced and stable.

[0063] In addition, the annular flexible connector can be connected to the four edges of the sliding plate 7 to form a flexible skirt, which makes it easy to form the flexible connector and easy to connect with the first channel wall 11.

[0064] In addition, the flexible connector in the fluid switching body 4 may not be elastic. In this way, after the supply of the first fluid is stopped, the return of the sliding plate 7 can be achieved manually, or by the elastic member connected to the sliding plate 7, or by the elastic member connected to the switching member 5.

[0065] Additionally, in alternative embodiments, reference is made to... Figure 1 and Figure 2 The flexible connector is an elastic skirt 8. Thus, the elastic skirt 8 can automatically return to its original position under its own restoring elastic force. After returning to its original position, the elastic skirt 8 can also be used to apply pre-pressure to the on / off element 5 connected to the sliding plate 7. Under this pre-pressure, the on / off element 5 maintains a state of blocking the flow in the second fluid channel 2. At this time, when the first fluid is supplied, the pressure applied to the sliding plate 7 by the first fluid needs to overcome this pre-pressure of the elastic skirt 8. Then, the elastic skirt 8 elastically deforms to allow the sliding plate 7 to move, thereby moving the on / off element 5 to allow the flow in the second fluid channel 2.

[0066] In addition, in practical use, depending on the different arrangement structures of the fluid flow control body, either side of the sliding plate 7 can be used as the pressure plate surface for the first fluid.

[0067] In addition, in practical use, the first channel wall 11 can be provided with various different structures to connect the flexible connector. For example, in one embodiment, a cylinder extends inward from the first channel wall 11, and a fluid inlet opening is formed on the cylinder wall. The flexible connector can be connected to the radial inner opening of the cylinder, so that the first fluid can enter the cylinder from the fluid inlet opening to apply pressure to the plate surface of the sliding plate 7 facing the inside of the cylinder. Alternatively, in another embodiment, the flexible connector is used to connect to the edge 14 of the opening formed on the first channel wall 11, so that the fluid flow cut-off body 4 is part of the channel wall of the first channel wall 11. That is, an opening is formed on the first channel wall 11, and a flexible connector can be connected to the edge 14 of the opening, so that the sliding plate 7 is located inside the opening. In this way, the fluid cut-off body 4 will form part of the channel wall of the first channel wall 11. When the first fluid flows in the first fluid channel, pressure can be applied to the inner side of the sliding plate 7 facing the first fluid channel 1. This pressure can drive the sliding plate 7 to move outward, and when the pressure is removed, for example, when it returns to normal atmospheric pressure, the sliding plate 7 moves inward back to its original position.

[0068] Additionally, refer to Figure 1 and Figure 2 To facilitate a larger travel of the sliding plate 7, the flexible connector includes a U-shaped wall 9 extending into the first fluid channel 1. This U-shaped wall 9, with its curved sidewalls, effectively increases the travel of the sliding plate 7. For example, when the flexible connector is an elastic skirt 8, this U-shaped wall 9 can also store greater elastic return energy, making it easier for the sliding plate 7 to return to its original position and applying greater preload to the on / off element 5 connected to the sliding plate 7, thus enabling the on / off element 5 to more stably and reliably cut off the flow in the second fluid channel 2.

[0069] Furthermore, in practical use, the flexible connector can be connected to the first channel wall 11 in various ways. For example, the flexible connector can be connected to the first channel wall 11 by screws, welding, or snap-fit. For example, see reference... Figure 1 The flexible connector has connecting bodies 13 around its four edges, and radial grooves 10 are formed on the outer peripheral surface of the connecting bodies 13. This allows for convenient insertion of the grooves 10 into corresponding edges on the first channel wall 11, for example... Figure 1 In this way, the card slot 10 can be easily inserted into the edge 14 of the open opening.

[0070] In a second aspect, the present invention provides a fluid switching component, which includes a switching element 5 and a fluid switching body 4 as described in any of the first aspects above, wherein the switching element 5 is connected to a sliding plate 7; wherein the switching element 5 is used to extend from the first fluid channel 1 of the fluid switching device into a second fluid channel 2 isolated from the first fluid channel 1 within the fluid switching device and is movable; wherein the switching element 5 is used to cut off the flow in the second fluid channel 2, and the sliding plate 7 is used to move under the pressure of the fluid in the first fluid channel 1, so as to drive the switching element 5 to move and allow the flow in the second fluid channel 2.

[0071] Thus, as described in the first aspect above, in practical use, the flexible connector can be connected to the first channel wall 11 of the first fluid channel 1 of the fluid switching device. The switching element 5 can extend from the first fluid channel 1 into the second fluid channel 2 within the fluid switching device. When the first fluid is not supplied through the first fluid channel 1, the switching element 5 can cut off the flow in the second fluid channel 2 to stop the supply of the second fluid. When the first fluid is supplied through the first fluid channel 1, the first fluid will exert pressure on the sliding plate 7. Under the flexible deformation of the flexible connector, the pressure exerted by the first fluid on the sliding plate 7 will drive the sliding plate 7 to move, thereby moving the switching element 5 to open the second fluid channel, allowing the second fluid to be supplied. In this way, the supply of the second fluid can be controlled by whether the first fluid is supplied, thereby improving the safety and reliability of the second fluid supply. For example, when applied to ventilation therapy equipment, the first fluid can be the airflow supplied by the fan, and the second fluid can be the oxygen supplied by the oxygen source. This avoids oxygen waste and significantly improves the safety of oxygen use in ventilation therapy equipment.

[0072] In addition, the through / break component 5 can be a plate or a column.

[0073] Additionally, refer to Figure 1 The switch 5 is connected at the center of the sliding plate 7, so that the switch 5 can move more smoothly when the sliding plate 7 moves.

[0074] Furthermore, the switch 5 and the sliding plate 7 are detachably connected, allowing for easy replacement of either the switch 5 or the sliding plate 7 depending on the extent of damage during actual use. Alternatively, the switch 5 and the sliding plate 7 can be integrally molded together.

[0075] Thirdly, the present invention provides a fluid flow / disconnection housing, as referenced. Figure 1 and Figure 2 The fluid switching housing 3 is provided with an isolated first fluid channel 1 and a second fluid channel 2. The first channel wall 11 of the first fluid channel 1 is used to connect the flexible connector of any of the fluid switching components described in the second aspect above. An opening is formed on the first channel wall 11, and the edge 14 of the opening is used to connect the flexible connector of any of the fluid switching components described in the second aspect above, so that the fluid switching body 4 of any of the fluid switching components described in the second aspect above serves as part of the channel wall of the first channel wall 11.

[0076] In practical use, the fluid switching housing can connect any of the fluid switching components described in the second aspect above to the opening edge 14. Thus, the fluid switching body 4 serves as part of the first channel wall 11, while the switching component 5 extends from the first fluid channel 1 into the second fluid channel 2 within the fluid switching device. When the first fluid is not supplied through the first fluid channel 1, the switching component 5 can cut off the flow in the second fluid channel 2 to stop the supply of the second fluid. When the first fluid is supplied through the first fluid channel 1, the first fluid applies pressure to the sliding plate 7. Under the flexible deformation of the flexible connector, the pressure applied to the sliding plate 7 by the first fluid drives the sliding plate 7 to move, thereby moving the switching component 5 to open the second fluid channel, allowing the second fluid to be supplied. Thus, the supply of the second fluid can be controlled by whether the first fluid is supplied, thereby improving the safety and reliability of the second fluid supply. For example, when applied to ventilation therapy equipment, the first fluid can be the airflow supplied by the fan, and the second fluid can be the oxygen supplied by the oxygen source. This can avoid oxygen waste and significantly improve the safety of oxygen use in ventilation therapy equipment.

[0077] Additionally, within this fluid channel housing, other fluid channels can be provided between the first fluid channel 1 and the second fluid channel 2, and the switching element 5 can extend into the second fluid channel 2 through these other fluid channels. Alternatively, refer to... Figure 1 and Figure 2 The common channel wall 16 between the first fluid channel 1 and the second fluid channel 2 includes a through channel for mounting the on / off element 5 of any of the fluid on / off components described in the second aspect above. This simplifies the internal structure of the fluid channel housing and improves the reliability of the movement of the on / off element 5.

[0078] Fourthly, the present invention provides a fluid on / off device, referring to... Figures 1-12 In the different embodiments shown, the fluid switching device includes a fluid switching housing 3 and a fluid switching component. The fluid switching housing 3 is provided with an isolated first fluid channel 1 and a second fluid channel 2. The fluid switching component includes a fluid switching body 4 and a switching element 5. The fluid switching body 4 is movably disposed in the first fluid channel 1. The switching element 5 is connected to the fluid switching body 4. The switching element 5 extends from the first fluid channel 1 into the second fluid channel 2 and is movable. When the pressure on the fluid switching body 4 in the first fluid channel 1 is less than the active pressure that causes the fluid switching body to move, the switching element 5 cuts off the flow in the second fluid channel 2. When the pressure on the fluid switching body 4 exerted by the first fluid in the first fluid channel 1 is greater than the active pressure, the fluid switching body 4 is movable and drives the switching element 5 to move so as to allow the flow in the second fluid channel 2.

[0079] In this technical solution, the fluid switching body 4 is movably disposed in the first fluid channel 1, and the switching element 5 is connected to the fluid switching body 4. The switching element 5 extends from the first fluid channel 1 into the second fluid channel 2 and is movable. When the pressure on the fluid switching body 4 in the first fluid channel 1 is less than the active pressure that causes the fluid switching body 5 to move, for example, when the first fluid is not supplied in the first fluid channel 1, the switching element 5 cuts off the flow in the second fluid channel 2 to stop the supply of the second fluid in the second fluid channel 2. When the first fluid channel 1 supplies the first fluid, and the pressure on the fluid switching body in the first fluid is greater than the active pressure, the fluid switching body 4 is movable and drives the switching element 5 to move so that the flow in the second fluid channel 2 can be opened to supply the second fluid. In this way, the supply of the second fluid can be controlled by whether the first fluid is supplied, thereby improving the safety and reliability of the second fluid supply. For example, when this fluid switching device is used in ventilation therapy equipment, the first fluid can be the airflow supplied by the fan, and the second fluid can be the oxygen supplied by the oxygen source. In this way, oxygen waste can be avoided and the safety of oxygen use in ventilation therapy equipment can be significantly improved.

[0080] In addition, in one embodiment of this fluid switching device, as described above, the fluid switching body 4 can be disposed inside the first fluid channel 1. Alternatively, in another embodiment, refer to... Figure 1 The fluid switching body 4 serves as part of the channel wall of the first channel wall 11 of the first fluid channel 1. This can be achieved in various ways. For example, in one way, a cylinder is formed on the first channel wall 11, and the fluid switching body 4 can be slidably and sealingly disposed in the cylinder. In this way, the fluid switching body 4, being encapsulated in the cylinder, also serves as part of the channel wall of the first channel wall 11.

[0081] In addition, refer to Figure 3The fluid switching device includes an elastic element 6. When the pressure in the first fluid channel 1 on the fluid switching body 4 is less than the active pressure that causes the fluid switching body to move, the elastic element 6 can apply an elastic preload to the switching element 5, so that the switching element 5 can cut off the flow in the second fluid channel 2. In this way, through the elastic preload applied to the switching element 5 by the elastic element 6, the switching element 5 can more stably and reliably cut off the flow in the second fluid channel 2.

[0082] Of course, the elastic element 6 can have various structures and arrangements. For example, refer to... Figure 1 , Figure 5 and Figure 9 The fluid switching element 4 includes an elastic element 6. For example, the elastic element 6 can be connected between the sliding plate 7 and the channel wall of the first fluid channel 1, as long as an elastic preload can be applied to the switching element 5. The elastic element 6 can be a spring or an elastic strip.

[0083] Furthermore, in this fluid switching device, the fluid switching component can have various structural forms, but regardless of the structural form, it is acceptable as long as it can achieve the aforementioned function. For example, the fluid switching component may include a base plate, a switching element 5, and a spring, with the spring connected between the base plate and the channel wall of the first fluid channel 1. Alternatively, the fluid switching component may be any of the fluid switching components described in the second aspect above, wherein a flexible connector is connected to the first channel wall 11 of the first fluid channel 1, so that the sliding plate 7 can move the switching element 5 by the flexible deformation of the flexible connector.

[0084] Furthermore, as described above, when the flexible connector is an elastic skirt 8, the elastic skirt 8 can function as the elastic element 6. In this case, the elastic skirt 8 can be considered as the elastic element. Thus, the elastic skirt 8 can automatically return to its original position under its own restoring elastic force. After returning to its original position, the elastic skirt 8 can also be used to apply pre-pressure to the on / off element 5 connected to the sliding plate 7. Under this pre-pressure, the on / off element 5 maintains a state of cutting off the flow in the second fluid channel 2. At this time, when the first fluid is supplied, the pressure applied to the sliding plate 7 by the first fluid needs to overcome this pre-pressure of the elastic skirt 8. Then, the elastic skirt 8 elastically deforms to allow the sliding plate 7 to move, thereby moving the on / off element 5 to allow the flow in the second fluid channel 2.

[0085] Furthermore, in this fluid switching device, the fluid switching housing 3 can have various structural forms. In one embodiment, the fluid switching housing 3 is any of the fluid channel housing 3 described in the third aspect above, wherein a flexible connector is connected to the edge 14 of the open opening, so that the fluid switching body 4 serves as part of the channel wall of the first channel wall 11.

[0086] In addition, refer to Figure 1 and Figure 2The flexible connector includes a U-shaped wall 9 that extends into the first fluid channel 1, with the opening of the U-shaped wall 9 facing outwards from the first fluid channel 1. In this way, the U-shaped wall 9 can effectively increase the stroke of the sliding plate 7 by utilizing the sidewalls formed by its bending. For example, when the flexible connector is an elastic skirt 8, when the sliding plate 7 moves outwards under the pressure of the first fluid, it will cause the bottom wall and both sidewalls of the U-shaped wall 9 to deform, thereby storing greater elastic return energy. This makes it easier for the sliding plate 7 to return to its original position and allows for the application of greater pre-pressure to the on / off element 5 connected to the sliding plate 7, enabling the on / off element 5 to more stably and reliably cut off the flow in the second fluid channel 2.

[0087] Additionally, refer to Figure 3 , Figure 7 and Figure 11 The elastic element 6 can be disposed between the second channel wall 12 of the second fluid channel 2 and the on / off segment 15 extending into the second fluid channel 2. Thus, in the structure of the fluid switching body 4 including the flexible connector, the flexible connector may have no elasticity or have negligible elasticity, thereby facilitating the molding of the flexible connector of the fluid switching body 4. For example, the flexible connector can be a corrugated pipe segment. Alternatively, the flexible connector may also have elasticity.

[0088] Additionally, refer to Figure 1 The common channel wall 16 between the first fluid channel 1 and the second fluid channel 2 includes a guide mounting cylinder 17 with a through channel, and the switch element 5 is axially movable through the guide mounting cylinder 17. In this way, the guide mounting cylinder 17 can extend the moving guide stroke of the switch element 5, thereby making the movement of the switch element 5 smoother.

[0089] Additionally, refer to Figure 3 The guide mounting cylinder 17 may include a second cylinder section 22 extending into the second fluid channel 2 and a first cylinder section 21 extending into the first fluid channel 1, which can further extend the moving guide stroke of the switch 5, thereby making the movement of the switch 5 more stable.

[0090] In addition, refer to Figure 3 In one embodiment, the fluid switching device includes an elastic element 6, which is sleeved on the switching element 5 and abuts against a stop flange inside the guide mounting cylinder 17. The stop flange can be located inside the first cylinder section 21 or the second cylinder section 22. When the pressure in the first fluid channel 1 on the fluid switching body 4 is less than the active pressure that causes the fluid switching body to move, the elastic element 6 can apply an elastic preload to the switching element 5, so that the switching element 5 cuts off the flow in the second fluid channel 2. In this way, the second cylinder section 22 can provide a stable and reliable positioning for the elastic element 6, preventing the stored energy in the elastic element 6 from shaking.

[0091] In addition, refer to Figure 1 and Figure 2 Following the direction of fluid flow, such as Figure 1 and Figure 2 As shown by the dashed and solid arrows, the first fluid channel 1 is equipped with a first fluid discharge check valve 18 located downstream of the on / off element 5 and the fluid on / off body 4. The first fluid discharge check valve 18 can prevent the second fluid in the second fluid channel 2 from entering the first fluid channel 1 when the pressure of the second fluid in the second fluid channel 2 is greater than the pressure of the first fluid in the first fluid channel 1. In one embodiment, the first fluid discharge check valve 18 can be opened after the on / off element 5 has opened the second fluid channel 2. For example, the opening pressure of the first fluid discharge check valve 18 is greater than the operating pressure. In this way, when the first fluid applies pressure to the fluid on / off body 4, the first fluid discharge check valve 18 remains closed until the on / off element 5 opens the second fluid channel 2. As the pressure of the first fluid increases, the first fluid discharge check valve 18 opens to allow the first fluid to pass through. In another embodiment, the opening of the first fluid discharge check valve 18 and the opening of the second fluid channel 2 can occur simultaneously. In another embodiment, the first fluid discharge check valve 18 can be opened before the second fluid channel is opened. For example, as the pressure of the first fluid increases, such as as the fan speed increases, the pressure increases, and the first fluid discharge check valve 18 opens first. Then, when the pressure reaches a certain value, the pressure can drive the on / off element 5 to open the second fluid channel.

[0092] In addition, refer to Figures 1-12 In the different embodiments shown, the second fluid channel 2 is provided with a sealing cylinder 20 having a fluid inlet 19. The internal flow channel of the sealing cylinder 20 serves as a fluid channel segment of the fluid channel 2. The shut-off element 5 can be pressed against the end face of the cylinder opening of the sealing cylinder 20 to block the fluid inlet 19, and / or the shut-off element 5 can extend into the sealing cylinder 20 to block the fluid inlet 19, thereby cutting off the flow in the second fluid channel 2. In this way, the sealing cylinder 20 can be used to achieve the flow opening and closing of the second fluid channel with a smaller flow cross-section, resulting in a compact structure.

[0093] In addition, refer to Figure 9 and Figure 10 The fluid inlet 19 includes an inner diameter tapering section 23, and the shut-off element 5 includes an outer diameter tapering plug 24 that mates with the inner diameter tapering section 23. In this way, the outer diameter tapering plug 24 can enter the inner diameter tapering section 23 and make a shape-fitting sealing contact, thereby making the shut-off of the second fluid channel 2 more stable and reliable.

[0094] In addition, refer to Figure 1 and Figure 2The fluid flow control housing 3 is provided with a fluid mixing channel 25, and the outlet end of the first fluid channel 1 and the outlet end of the second fluid channel 2 are connected to the fluid mixing channel 25. In this way, the first fluid and the second fluid can mix in the fluid mixing channel 25 and flow out from the outlet of the fluid mixing channel 25.

[0095] Furthermore, this fluid on / off device can be used for on / off control of any fluid supply. For example, in one embodiment, reference... Figure 1 The first fluid channel 1 serves as an air delivery channel, and its inlet end serves as a fan connection end 26. The second fluid channel 2 serves as an oxygen delivery channel. Thus, as described above, the oxygen supply can be stably and reliably controlled, thereby avoiding oxygen waste and significantly improving the safety of oxygen use in ventilation therapy equipment.

[0096] Fifthly, the present invention provides an oxygen supply control method for controlling the oxygen supply of a ventilation therapy device. The oxygen supply control method includes: movably installing an oxygen valve in an oxygen supply channel and an air supply channel connected to a fan; when the ventilation therapy device is turned on and the fan is running, the airflow provided by the fan applies pressure to the oxygen valve, causing the oxygen valve to open the oxygen supply channel to supply oxygen; when the ventilation therapy device is turned off, or when the fan or circuit malfunctions and the fan stops running during the operation of the ventilation therapy device, the oxygen valve can close the oxygen supply channel under the elastic restoring force of an elastic element to stop supplying oxygen.

[0097] In this way, by activating oxygen valves in the oxygen supply channel and the air supply channel connected to the fan, and by applying pressure through the airflow supplied by the fan, the oxygen supply can be stably and reliably controlled, thereby avoiding oxygen waste and significantly improving the safety of oxygen use in ventilation therapy equipment.

[0098] In this oxygen supply control method, the oxygen valve can be oscillating and includes an oxygen baffle extending into the oxygen supply channel and an air baffle extending into the air supply channel. The airflow provided by the fan can drive the air baffle to oscillate, thereby causing the oxygen valve to oscillate, so as to open the oxygen supply channel to supply oxygen. Alternatively, this oxygen supply control method can be implemented by any of the fluid on / off devices described above.

[0099] Sixthly, the present invention provides a ventilation therapy device, with reference to... Figure 13The diagram shown illustrates the use of the ventilation therapy device, which includes a fan 27 and a fluid on / off device 28 as described in the fourth aspect above. The first fluid channel 1 serves as an air delivery channel, with its inlet end connected to the outlet end of the fan 27. The second fluid channel 2 serves as an oxygen delivery channel. Thus, as described above, the safety of oxygen use in this ventilation therapy device is significantly improved, thereby enhancing the overall performance of the device.

[0100] Alternatively, the ventilation therapy device can implement the oxygen supply control method described in the fifth aspect above. In this way, as mentioned above, the safety of oxygen use in the ventilation therapy device is significantly improved, thus enhancing the overall performance of the ventilation therapy device.

[0101] The ventilation therapy equipment can be a ventilator or a high-flow oxygen therapy device.

[0102] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0103] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0104] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A fluid on / off device, characterized in that, include: A fluid flow control housing (3) is provided with an isolated first fluid channel (1) and a second fluid channel (2). A fluid switching component, comprising a fluid switching body (4) and a switching element (5), wherein the fluid switching body (4) is movably disposed in the first fluid channel (1), and the switching element (5) is connected to the fluid switching body (4), wherein the switching element (5) extends from the first fluid channel (1) into the second fluid channel (2) and is movable; The fluid switching body (4) includes a sliding plate (7) and a flexible connector, wherein the flexible connector is connected to the sliding plate (7) and is connected to the first channel wall (11) of the first fluid channel (1). The sliding plate (7) can move under the pressure of the fluid in the first fluid channel (1) to drive the flexible connector to deform flexibly. The switching element (5) is connected to the sliding plate (7). Wherein, when the pressure exerted by the first fluid in the first fluid channel (1) on the fluid switching body (4) is less than the active pressure that causes the fluid switching body to move, the switching element (5) cuts off the flow in the second fluid channel (2) to stop the supply of the second fluid; When the pressure exerted by the first fluid in the first fluid channel (1) on the fluid switch (4) is greater than the active pressure, the fluid switch (4) can move and drive the switch (5) to move so as to open the second fluid channel (2).

2. The fluid on / off device according to claim 1, characterized in that, The flexible connector is an annular flexible connector and is connected to the four edges of the sliding plate (7); And / or, The flexible connector is an elastic skirt (8).

3. The fluid on / off device according to claim 1, characterized in that, The flexible connector is used to connect to the edge (14) of the opening formed on the first channel wall (11) so that the fluid cut-off body (4) is part of the channel wall of the first channel wall (11).

4. The fluid on / off device according to claim 1, characterized in that, The flexible connector includes a U-shaped wall (9) for extending into the first fluid channel (1).

5. The fluid on / off device according to claim 1, characterized in that, The flexible connector is connected to a connector (13) around its four edges, and a radial groove (10) is formed on the outer peripheral surface of the connector (13).

6. The fluid on / off device according to claim 1, characterized in that, The switch (5) is connected at the center of the sliding plate (7); and / or the switch (5) and the sliding plate (7) are detachably connected.

7. The fluid on / off device according to claim 1, characterized in that, The common channel wall (16) between the first fluid channel (1) and the second fluid channel (2) includes a through channel for installing the switch (5).

8. The fluid on / off device according to claim 1, characterized in that, The fluid switching device includes an elastic element (6). When the pressure in the first fluid channel (1) on the fluid switching body (4) is less than the active pressure that causes the fluid switching body to move, the elastic element (6) can apply an elastic pre-pressure to the switching element (5) so that the switching element (5) cuts off the flow in the second fluid channel (2).

9. The fluid on / off device according to claim 8, characterized in that, The fluid switching body (4) includes the elastic element.

10. The fluid on / off device according to claim 9, characterized in that, When the flexible connector is an elastic skirt (8), the elastic skirt (8) serves as the elastic element.

11. The fluid on / off device according to claim 1, characterized in that, The flexible connector includes a U-shaped wall (9) that extends into the first fluid channel (1), with the opening of the U-shaped wall (9) facing the outside of the first fluid channel (1).

12. The fluid switching device according to claim 8, characterized in that, The elastic element (6) is disposed between the second channel wall (12) of the second fluid channel (2) and the on / off segment (15) that extends into the second fluid channel (2).

13. The fluid on / off device according to claim 1, characterized in that, The common channel wall (16) between the first fluid channel (1) and the second fluid channel (2) includes a guide mounting cylinder (17) with a through channel, and the switch (5) is axially movable inside the guide mounting cylinder (17).

14. The fluid switching device according to claim 13, characterized in that, The guide mounting cylinder (17) includes a first cylinder section (21) extending into the first fluid channel (1) and a second cylinder section (22) extending into the second fluid channel (2).

15. The fluid on / off device according to claim 14, characterized in that, The fluid switching device includes an elastic element (6), which is sleeved on the switching element (5) and abuts against the stop flange inside the elastic element (6) and the guide mounting cylinder (17). When the pressure in the first fluid channel (1) on the fluid switching body (4) is less than the active pressure that makes the fluid switching body move, the elastic element (6) can apply an elastic preload to the switching element (5) so that the switching element (5) cuts off the flow in the second fluid channel (2).

16. The fluid on / off device according to claim 1, characterized in that, Along the direction of fluid flow, the first fluid channel (1) is provided with a first fluid discharge check valve (18) located downstream of the on / off element (5) and the fluid on / off body (4).

17. The fluid on / off device according to claim 1, characterized in that, The second fluid channel (2) is provided with a sealing cylinder (20) having a fluid inlet (19). The internal flow channel of the sealing cylinder (20) serves as a part of the fluid channel (2). The shut-off element (5) can press against the end face of the cylinder opening of the sealing cylinder (20) to block the fluid inlet (19), and / or the shut-off element (5) can extend into the sealing cylinder (20) to block the fluid inlet (19) so as to cut off the flow of the second fluid channel (2).

18. The fluid switching device according to claim 17, characterized in that, The fluid inlet (19) includes an inner diameter tapered section (23), and the switch (5) includes an outer diameter tapered plug (24) that mates with the inner diameter tapered section (23).

19. The fluid on / off device according to claim 1, characterized in that, The fluid switching housing (3) is provided with a fluid mixing channel (25), and the outlet end of the first fluid channel (1) and the outlet end of the second fluid channel (2) are both connected to the fluid mixing channel (25).

20. The fluid switching device according to any one of claims 1-19, characterized in that, The first fluid channel (1) serves as an air delivery channel, and the inlet end of the first fluid channel (1) serves as a fan connection end (26), while the second fluid channel (2) serves as an oxygen delivery channel.

21. A ventilation therapy device, characterized in that, Includes a fan (27) and a fluid switching device (28) according to any one of claims 1-20, wherein the first fluid channel (1) serves as an air delivery channel, and the inlet end of the first fluid channel (1) is connected to the outlet end of the fan (27), and the second fluid channel (2) serves as an oxygen delivery channel.

22. The ventilation therapy device according to claim 21, characterized in that, The ventilation therapy device can implement an oxygen supply control method, the oxygen supply control method comprising: The oxygen valve is movably installed in the oxygen supply channel and the air supply channel connected to the blower; When the ventilation therapy equipment is turned on and the fan is running, the air flow provided by the fan applies pressure to the oxygen valve, so that the oxygen valve opens the oxygen supply channel to supply oxygen. When the ventilation therapy equipment is turned off, or when the fan or circuit malfunctions during the operation of the ventilation therapy equipment and the fan stops, the oxygen valve will close the oxygen supply channel to stop the supply of oxygen.

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