GAS CONTROL DEVICE FOR A VENTILATOR

Description

[0001] The present disclosure relates to a gas control device for a ventilator, comprising a first gas channel with a check valve, a second gas channel, and a switching device. The gas control device can be arranged in the ventilator or associated with the ventilator. Ventilators are used for the treatment of respiratory disorders. The ventilators can be used for non-invasive and invasive ventilation, both in-hospital and out-of-hospital.

[0002] When ventilating a patient, a ventilator can typically be used with an inspiratory branch for the respiratory gas flow and, optionally, an expiratory branch for the respiratory gas flow. The expiratory branch allows the patient to exhale or exhale a respiratory gas, while the inspiratory branch supplies the patient with respiratory gas.

[0003] In the ventilators known in the prior art, blockages or malfunctions can occur in the expiratory branch of the ventilator. The following documents are known from the prior art: WO 2017 / 059667 A1, DE 20 2017 005964 U1, CN 107 308 531 A, DE 20 2011 102764 U1 and DE 10 2016 001140 A1.

[0004] If the inspiratory branch of the ventilator includes a one-way valve, exhaled gas cannot be returned to the ventilator. The patient is then prevented from exhaling.

[0005] It is therefore an object of the present disclosure to provide a device which ensures expiration of respiratory gas even in the event of a malfunction or blockage of a particular expiratory branch of a ventilator.

[0006] It is also an object of the present disclosure to provide a device which provides a gas channel which can be activated as required.

[0007] This object of the invention is achieved by a gas control device according to claim 1. Further developments and advantageous embodiments are the subject of the subclaims. Further advantages and features will become apparent from the general description and the description of the exemplary embodiments.

[0008] The present disclosure relates to a gas control device for a ventilator comprising a first gas channel with a first valve, wherein the first gas channel and the valve are configured to allow a pressurized gas flow to pass in a first direction and to block a pressurized gas flow in a second direction, wherein an opening branches off from the first gas channel and leads to a bypass channel for the valve, wherein a second valve is configured to block and / or at least temporarily enable a gas flow from the first gas channel to the bypass channel, wherein a switching device is configured to control the second valve, to block and / or at least temporarily enable a gas flow from the first gas channel to the bypass channel.

[0009] The present disclosure also relates to a gas control device comprising a first gas channel with a first valve, wherein the first gas channel and the valve are configured to allow a pressurized gas flow to pass in a first direction and to block a pressurized gas flow in a second direction, wherein an opening branches off from the first gas channel and leads to a bypass channel for the valve, wherein a second valve is configured to block and / or at least temporarily enable a gas flow from the first gas channel to the bypass channel, wherein a switching device is configured to control the second valve, to block and / or at least temporarily enable a gas flow from the first gas channel to the bypass channel.

[0010] The present disclosure is also characterized in that the second direction is opposite to the first direction.

[0011] The present disclosure is also characterized in that the first valve is a pneumatically actuated check valve which is actuated by the force of the pressurized gas flow in the second direction such that the gas flow cannot pass the check valve in a second direction.

[0012] The present disclosure is also characterized in that the gas flow of the second direction is respiratory gas of expiration and the gas flow of the first direction is respiratory gas of inspiration.

[0013] The present disclosure is also characterized in that a breathing gas source draws in breathing gas from the environment and conveys it along the first gas channel for inspiration in the first direction to the hose nozzle and the breathing hose, wherein the gas flow passes the opened check valve.

[0014] The present disclosure is also characterized in that the switching device opens the valve and thus the pressurized gas flow of the expiration passes through the opening and through the bypass channel at least partially into the environment.

[0015] The present disclosure is also characterized in that the valve is designed as a pneumatic valve, wherein a seal of the valve closes or opens the gas-conducting connection between the opening and the bypass channel, and wherein a second gas channel is configured to direct a pneumatic control pressure to the surface of the seal.

[0016] The present disclosure is also characterized in that the seal acted upon by the control pressure is configured to sealingly engage the edge of the opening and thus prevent gas flow from the opening into the bypass channel.

[0017] The present disclosure is also characterized in that the second gas channel is pneumatically connected to the ventilation tube or the gas channel and the switching device opens or closes the pneumatic connection at least temporarily.

[0018] The present disclosure also relates to a gas control device for a ventilator comprising a first gas channel with a check valve, a second gas channel and a switching device, wherein the first gas channel has an opening for the outflow of gas with a seal and a closure cap.

[0019] According to the disclosure, the gas control device is configured to direct the gas flow of the first gas channel past the check valve in the event of a blockage or disruption of an expiratory branch of the ventilator. This ensures the patient's exhalation in the event of a blockage or disruption of the expiratory branch. For example, the first gas channel is connected to the second gas channel. A separate design of the first gas channel and the second gas channel, with the second gas channel being fed by a separate gas channel, is conceivable in an alternative embodiment. It is also conceivable to use the gas control device according to the disclosure in the event of a blockage / disturbance in an inspiratory branch of the ventilator. In such a case, the gas control device could be used to ensure a patient's inspiration in the event of a blockage or disruption in the inspiratory branch of the ventilator.

[0020] The gas control device is configured to control the second gas channel in the event of a blockage or disruption of the expiratory branch such that the gas flow of the first gas channel flows out through the opening or flows past the check valve via a bypass channel. The gas flow of the first gas channel is generally composed of an inhalation gas and / or an exhalation gas. In particular, in the event of a blockage or disruption of the expiratory branch, a patient's exhalation gas can be redirected via the inspiratory branch or the first gas channel to the check valve. Therefore, the opening of the first gas channel is advantageously arranged in the region of the check valve downstream of the check valve in the inspiration flow direction.

[0021] The gas control device is configured to control the pressure in the second gas channel. "To control" can mean that the switching device can be configured to enable or disable the second gas channel. In an alternative embodiment, the switching device can be continuously and infinitely controllable. Based on the control of the gas flow in the second gas channel, in particular the enabling or disabling of the second gas channel, the gas flow in the first gas channel (the exhaled gas or the exhaled gas flow) can be guided past the check valve. The gas flow in the first gas channel is guided past the check valve via a bypass channel.The gas flow diverted into the bypass channel can be fed back to the first gas channel, advantageously in a region upstream of the check valve in the inspiration flow direction of the gas flow, or can be discharged via the bypass channel or a separate branch, which can be configured as an inspiratory or expiratory branch.

[0022] The gas control device can be configured to be controllable based on a detected volume, a detected flow rate or a detected pressure of a gas flow.

[0023] In particular, the gas control device may comprise at least one sensor, wherein the switching device may be configured to be controllable based on a parameter detected by the at least one sensor.

[0024] The at least one sensor of the gas control device can, for example, be configured as part of the switching device to detect at least one respiratory parameter, respiratory gas parameter, and / or another parameter from output signals. One or more detected parameters can form a function that relates, for example, to measurements of one or more of the following quantities: (peak) flow, flow rate, (tidal) volume, pressure, temperature, humidity, velocity, acceleration, gas composition (e.g., a concentration or concentrations of one or more components), thermal energy dissipation, (intentional) gas leakage, and / or other measurements related to the respiratory gas flow.

[0025] Respiratory parameters can, for example, be derived from gas parameters and / or other output signals, where one or more respiratory parameters can be one or more of the following: respiratory rate, respiratory duration, inhalation time or duration, expiratory time or period, respiratory flow curve shape, transition time from inhalation to exhalation and / or vice versa, transition time from (peak) inhalation flow rate to (peak) expiratory flow rate and / or vice versa, respiratory pressure curve shape, maximum proximal pressure drop (per respiratory cycle and / or phase), fraction of inspired oxygen and / or other respiratory parameters.

[0026] The gas control device according to the disclosure enables a patient to exhale even in the event of a blockage or disruption of the expiratory branch of the ventilator.

[0027] The gas control device is configured, for example, via the switching device to control the gas flow of the second gas channel and to allow the gas flow of the first gas channel to bypass the check valve through the opening. By controlling the gas flow of the second gas channel, the opening on which the seal rests, which is sealed by the gas flow or pressure of the second gas channel, can be opened. The gas flow of the first gas channel can escape from the opening. If the second gas channel is blocked, the pressure ratio in the region of the seal changes, so that a gas pressure of the gas flow of the first gas channel is greater than a gas pressure of the second gas channel. As a rule, the gas pressure of the blocked second gas channel is zero.

[0028] Typically, the bypass channel is designed in a ring shape around the opening of the first gas channel. Ring-shaped can also mean enclosing the opening. The ring-shaped design offers the advantage that gas can flow out of the opening at an angle of up to 360°. This allows a correspondingly large amount of expiratory exhaled gas to be discharged simultaneously through the opening of the first gas channel. Advantageously, the bypass channel is configured to concentrate the gas flow discharged through the opening and discharge it in one direction.

[0029] In one embodiment, the gas control device is configured, for example, via the switching device, to open or close the second gas channel. For example, the switching device is configured to open the second gas channel, whereby the seal resting on the opening can be subjected to a gas flow or pressure. By subjecting the seal to a gas flow or pressure, the seal can be pressed onto the opening. The switching device can also be configured to close the second gas channel, so that the seal resting on the opening cannot be subjected to a gas flow or pressure. In this case, the seal rests loosely on the opening. In this embodiment, a gas flow from the first gas channel can flow through the seal resting loosely or loosely on the opening into a bypass channel.

[0030] Advantageously, the gas control device is configured, for example via the switching device, to block the second gas channel in the event of a blockage or disruption of the expiratory branch. "Blocking" means that the switching device does not provide any gas flow or pressure in the second gas channel or closes it. By preventing the seal from being exposed to a gas flow from the second gas channel, the gas flow from the first gas channel is sufficient to lift the seal and transfer the gas flow from the first gas channel to the bypass channel.

[0031] Typically, the gas control device is configured, for example via the switching device, to release the second gas channel when the ventilator is used in a valve system, so that the second gas channel can conduct a gas flow. When used in a valve system, the expiratory or inspiratory branch of the ventilator, or the expiratory and inspiratory branches of the ventilator, are free of interference, and the opening of the gas control device is closed by pressure from the second gas channel, which is usually configured as a pressure channel.

[0032] Releasing means that the gas control device, for example via the switching device, opens the second gas channel to allow a gas flow through, thus subjecting the seal resting on the opening to a gas flow or pressure. Typically, the gas flow in the second gas channel is subjected to a pressure of 1 mbar to 100 mbar. The pressure presses the seal onto the opening and seals it.

[0033] The gas control device is configured to seal the gas flow from the first gas channel during normal operation of the ventilator by means of the gas flow from the second gas channel, which is directed via a connection of the closure cap to the seal of the gas control device, and the seal.

[0034] This means that the function of the check valve can be maintained during normal operation or when used in a valve hose system.

[0035] The gas control device is configured to apply pressure to the sealing membrane via the second gas channel when the ventilator is in a fault-free operating state, for example when the expiratory branch is fault-free, and thereby close the opening of the gas control device.

[0036] The gas control device is configured to block the second gas channel in the event of a blockage or disruption of the expiratory branch. This means that no pressure is exerted on the sealing membrane, and the opening can be opened by the gas pressure of the gas flow from the first gas channel. The gas flow exiting through the opening can be fed back into the first gas channel or discharged via a separate branch.

[0037] In one embodiment, the switching device (as part of the gas control device) can be configured to be controllable based on a time-controlled switching of an expiration and / or an inspiration.

[0038] In an alternative embodiment, the switching device (as part of the gas control device) can be configured to be controllable based on a parameter of the first gas channel. For example, at least one parameter of the gas flow in the first gas channel can be detected by means of a sensor. For example, a pressure within the first gas channel can be detected by means of a pressure sensor. The switching device is then configured to be controllable depending on the detected pressure of the gas flow in the first gas channel. For example, in the alternative embodiment, the switching device can be configured to enable or block the second gas channel depending on the achievement of a predetermined threshold value. Such a threshold value can, for example, be a value that is higher than the average detected pressure in the first gas channel.If the threshold is exceeded, the switching device can be configured to block the second gas channel. If the pressure in the first gas channel drops below the threshold, the switching device can release the second gas channel.

[0039] In a further alternative embodiment, the flow rate or volume of the gas flow of the first gas channel can also be detected by means of a sensor. The switching device can be configured to be controllable based on the determined flow rate or the detected volume of the gas flow. The switching device can also be configured to be controllable based on further parameters of the gas flow of the first gas channel.

[0040] In a further alternative embodiment, the switching device (as part of the gas control device) can also be configured to be variably switchable, wherein the switching device can be configured to continuously control a pressure of the gas flow in the second gas channel between 0 mbar and 1 bar, in particular between 0 mbar and 100 mbar. The switching device can also be configured to continuously increase the gas flow or pressure in the second gas channel to a predetermined value over a predetermined period of time.

[0041] The seal for a part of the gas control device, in particular for a valve, is designed to allow the gas flow of the first gas channel to flow through the opening when the second gas channel is blocked. The seal seals the bypass channel from the opening. The seal advantageously has a shape that places the seal on the opening and holds it when the first and second gas channels are empty of gas. The seal has a contact surface ratio of between 4 / 5 and 2 / 3. The seal is dimensioned such that it can be lifted by a gas flow from the first gas channel when the seal is not subjected to a gas flow or pressure by a gas flow from the second gas channel. Furthermore, the seal generally comprises a circumferential, reinforced edge that is designed to rest on the edge of the bypass channel.The circumferential, reinforced edge may include a locking or retaining structure that facilitates holding the seal on the edge of the bypass channel. For example, the circumferential, reinforced edge may include an edge that is configured to abut a protrusion on the edge of the bypass channel.

[0042] In one embodiment, the seal is arranged resting on the opening and comprises a weight. The weight, which is preferably integrated into the seal, supports the positioning of the seal on the opening. As a rule, the seal has a greater material thickness in the area in which the weight is integrally formed compared to the surrounding areas of the seal. The seal is typically circular. Alternatively, the seal can be rectangular, square, or oval, or have another geometric shape. The seal is generally designed to correspond to the shape of the opening and / or to the shape of the bypass channel surrounding the opening. Between the edge of the bypass channel and the weight, the seal can form a curvature that points in the direction of the first gas channel and prevents the seal from slipping.

[0043] According to the invention, the weight of the seal is ring-shaped and located in the center of the seal. "Middle" here means in the center of the circular seal. As a rule, the ring-shaped weight is washer-shaped. However, the weight can also be rectangular or oval. The ring-shaped design allows the seal to be placed on an edge of the opening that surrounds it. The seal can also only rest on the edge of the opening in certain areas. As a rule, the shape of the weight corresponds to the shape of the opening or the shape of the edge of the opening. The weight weighs down the seal, whereby the seal is held loosely on the edge of the opening. Optionally, the weight can be rectangular or have a different geometric shape. Furthermore, the weight can be arranged in a different area of ​​the seal.

[0044] According to the invention, the seal is made of an elastomeric material, and the weight is made of a metal. The seal is typically made of an elastomeric material with a hardness in the range between 15 and 25 Shore A, in particular between 18 and 22 Shore A. For example, the seal is made of silicone. Alternatively, the weight can be made of another material, such as a hard plastic or a combination of metal and plastic.

[0045] In a further development of the disclosure, the seal has a protrusion that is formed in the region of the weight and points in the direction of the first gas channel. The protrusion can be designed as a conical projection whose tip extends from the opening into the first gas channel. For example, the protrusion can be formed in the recess of the weight caused by the washer-shaped design. The protrusion helps to hold the seal on the opening of the first gas channel. The protrusion can optionally be formed in any shape that holds the seal in its position on the opening. In an alternative embodiment, the seal can be designed without any protrusion.

[0046] In an advantageous development of the disclosure, the closure cap is designed to be placed over the opening. As a rule, the closure cap can be clipped onto the opening. This offers the advantage that the closure cap, when placed onto the seal resting on the opening, does not shift its position. In order to be clipped onto the opening, the closure cap generally has at least two extensions, which typically have barbs that engage in recesses formed on an outer region of the opening. Alternatively, the closure cap of the gas control device can be provided with a bayonet lock. Optionally, the closure cap can be fastened to the opening using alternative locking elements.

[0047] In a further advantageous development of the disclosure, the closure cap comprises a connection that can be connected to the second gas channel. The shape of the connection is generally designed to correspond to the shape of the second gas channel. Alternatively, the connection and the gas channel can be connected by an adapter. The connection is configured to guide the gas flow or pressure of the second gas channel provided by the switching device to the seal. The connection is generally designed to be connected to the closure cap. The connection is typically connected to the closure cap in such a way that a gas flow can be applied vertically and centrally to the seal. Alternatively, the connection can also be arranged laterally on the closure cap. The connection, which can also be designed as a channel, has, for example, a diameter of between 0.1 mm and 0.5 mm.

[0048] According to the disclosure, the switching device (as part of the gas control apparatus) is configured to release the second gas channel during normal operation of the ventilator and to direct a gas flow or pressure via the second gas channel and the connection to the seal and to close the opening. During normal operation of the ventilator, there is no malfunction or blockage of an expiratory or inspiratory branch of the ventilator. The switching device is configured to control the gas flow or pressure of the second gas channel. As a rule, the gas flow in the second gas channel is subjected to a gas flow or pressure of 1 mbar to 1 bar, in particular between 10 mbar and 150 mbar. This seals the opening of the first gas channel so that the gas flow from the first gas channel cannot escape through the opening.

[0049] According to the disclosure, the switching device (as part of the gas control device) is configured to block the second gas channel in the event of a blockage or disruption of the expiratory branch. By blocking the second gas channel, the gas flow or pressure in the second gas channel comes to a standstill. The gas control device can discharge the gas flow from the first gas channel via the opening. If the second gas channel is blocked by the switching device, the gas flow or pressure in the first gas channel is greater than in the second gas channel. As a result, the gas flow from the first gas channel can lift the seal resting on the opening and guide the gas flow into the bypass channel, bypassing the check valve. The seal is lifted in such a way that the seal is pressed or held against the edge of the bypass channel in the region of the seal's boundary by the closure cap.Once the second gas channel is blocked and no gas flow or pressure is applied to the seal, the weight of the seal is lifted by the gas flow from the first gas channel, so that the seal resting on the edge of the opening is lifted, allowing the gas flow from the first gas channel to flow through the opening into the bypass channel.

[0050] The present disclosure further includes a seal for a part of the gas control device for a ventilator comprising a first gas channel with a check valve, a second gas channel and a switching device, wherein the first gas channel has an opening for the outflow of gas with a seal and a closure cap.

[0051] According to the disclosure, the seal has a weight and is configured to allow a gas flow from the first gas channel to pass through the opening when the second gas channel is blocked. The seal is generally circular. Alternatively, however, the seal can also be rectangular or have a different geometric shape. Typically, the seal is made of an elastomeric material, for example silicone. The seal generally has a hardness between 15 and 25 Shore A, in particular between 18 and 22 Shore A. In an alternative embodiment, the weight can be formed in a different region of the seal.

[0052] In one embodiment, the seal has an at least partially circumferential edge that is designed to engage in a recess of the gas control device. The circumferential edge is preferably reinforced and can have a protrusion that engages in a recess at the edge of the bypass channel. The circumferential edge of the seal serves, on the one hand, to seal and, on the other hand, to position the seal on the edge of the bypass channel. It is pressed, held, or sealed onto the edge of the bypass channel by the closure cap. The edge of the bypass channel can have a protrusion that is designed to bear against the seal in such a way that an edge of the seal engages with the protrusion.

[0053] The present disclosure also relates to a gas control device which is designed as an electrical and / or pneumatic control unit in a ventilator and is configured to allow a pressurized gas flow to pass in a first direction and to block a pressurized gas flow in a second direction and to block and / or at least temporarily enable a gas flow from the first gas channel to the bypass channel, wherein the gas control device is configured to block and / or at least temporarily enable a gas flow from the first gas channel to the bypass channel.

[0054] The gas control device can be designed as an electrical and / or pneumatic control unit which comprises different actuators and sensors, for example at least the switching devices, valves and the gas source, and controls these in a coordinated manner in the sense of the disclosure.

[0055] The gas control device can be designed as an electrical and / or pneumatic control unit and configured to allow a pressurized gas flow to pass in a first direction and to block a pressurized gas flow in a second direction and to block and / or at least temporarily enable a gas flow from the first gas channel to the bypass channel, wherein a gas control device is configured to block and / or at least temporarily enable a gas flow from the first gas channel to the bypass channel.

[0056] The present disclosure further includes a closure cap for a gas control device for a ventilator comprising a first gas channel with a check valve, a second gas channel and a switching device, wherein the first gas channel has an opening for the outflow of gas with a seal and a closure cap.

[0057] According to the disclosure, the closure cap has, at least in some regions, extensions that form barbs and are configured to engage in recesses on the gas control device. Alternatively, the closure cap can comprise a bayonet closure configured to engage in recesses on the opening.

[0058] The present disclosure further includes a ventilator comprising a gas control device according to at least one of the aforementioned features.

[0059] For the purposes of the disclosure, gas can be any breathable gas or gas mixture, in particular air, oxygen, expiration gas, or inspiration gas. Preferred embodiments of the disclosure are explained in more detail below using highly simplified schematic representations. It shows: Fig. 1a is a schematic view of a gas control device according to the disclosure, Fig. 1b is a schematic view of a gas control device according to the disclosure, the gas control device being shown only partially here, namely as a switching device or as a valve block, Fig. 2 is a schematic exploded view of the Figure 1b shown gas control device, Fig. 3 a longitudinal section through the Figures 1b and 2 shown gas control device, Fig. 4a a side view of the Figures 1b to 3 shown gas control device, Fig. 4b a plan view of a closure cap according to the invention of the Figures 1b to 4a shown gas control device, Fig. 4c a side view of a check valve of the Figures 1b to 4b gas control device shown.

[0060] In the figures, the same structural elements have the same reference numerals.

[0061] Figure 1ashows a schematic view of a gas control device 10 according to the disclosure for a ventilator 1. Ventilators 1 generally have an inspiratory branch, which is provided for supplying respiratory gas to a patient, and an expiratory branch, which serves to discharge respiratory gas exhaled by the patient. The gas control device 10 can be designed as an electrical and / or pneumatic control unit and configured to allow a pressurized gas flow to pass in a first direction and to block a pressurized gas flow in a second direction and to block and / or at least temporarily enable a gas flow from the first gas channel 11 to the bypass channel 21, wherein a gas control device 10 is configured to block and / or at least temporarily enable a gas flow from the first gas channel 11 to the bypass channel 21.

[0062] The Figure 1aThe gas control device 10 shown according to the disclosure is intended for use in a ventilator 1 or as part of a ventilator and has a first gas channel 11 with a first valve 19, wherein the first gas channel 11 and the valve 19 are configured to allow a pressurized gas flow to pass in a first direction and to block a pressurized gas flow in a second direction, wherein an opening 14 branches off from the first gas channel 11 and leads to a bypass channel 21 for the valve 19, wherein a second valve 15, 16 is configured to block and / or at least temporarily enable a gas flow from the first gas channel 11 to the bypass channel 21, wherein a switching device 13 is configured to control the second valve 15, 16, to block and / or at least temporarily enable a gas flow from the first gas channel 11 to the bypass channel 21.

[0063] The switching device here comprises, for example, the valve block 13 with the first valve 19, the second valve 15, 16, the first gas path 11 and the second gas path 12, and the bypass 14, 21. Optionally, the switching device 13 also includes the pneumatic or electronic control for the components of the valve block. A gas or breathing gas source 30, for example a blower, conveys gas or breathing gas, for example drawn in from the environment 29, along the first gas channel 11 for inspiration in the first direction to the hose connector 28 and the ventilation hose 27. The gas flow passes through the open check valve 19.

[0064] Expiration by the patient ensures a respiratory gas flow in a second direction through the ventilation tube, the nozzle 28 and the first gas channel 11 up to the check valve 19. This is a pneumatically actuated check valve 19, which is actuated in the second direction by the force of the pressurized gas flow of expiration and thus cannot pass through the check valve 19. Since the opening 14 is connected to the first gas channel 11, the pressurized gas flow of expiration also spreads in the second direction into the opening and reaches the valve 15, 16. If the switching device 13 opens the valve 15, 16, the pressurized gas flow of expiration flows further along the opening and the bypass channel 21 into the environment 29 or alternatively into the first gas channel and from there at least partially into the environment.

[0065] The valve 15, 16 can be designed as a pneumatic valve. In this case, a seal 15 of the valve can close or open the gas-conducting connection between the opening 14 and the bypass channel. The control impulse for the seal 15 of the valve comes from a second gas channel 12, which directs a pneumatic control pressure to the surface of the seal 15. When the seal is subjected to the control pressure, it seals against the edge 22 of the opening 14, thus preventing gas flow from the opening into the bypass channel.

[0066] For this purpose, the second gas channel can be pneumatically supplied from the ventilation tube or the gas channel 11. Another compressed gas source, such as a control fan, is also conceivable. The switching device 13 opens or closes the pneumatic connection between the second gas channel 12 and the ventilation tube or the gas channel 11, at least temporarily.

[0067] The valve 15, 16 can be designed as a switching valve. In this case, activation of the valve by the switching device 13 opens or closes the gas flow from the opening 14 into the bypass channel. In this case, a second gas channel is unnecessary.

[0068] Ventilators typically have an inspiratory branch, which is designed to supply breathing gas to a patient, and an expiratory branch, which is used to remove breathing gas exhaled by the patient.

[0069] Figure 1bshows a schematic view of a gas control device 10 according to the invention for a ventilator. The gas control device 10 is only partially shown here, namely as a switching device 13 or as a valve block, and comprises a first gas channel 11 with a first valve 19, wherein the first gas channel 11 and the valve 19 are configured to allow a pressurized gas flow to pass in a first direction and to block a pressurized gas flow in a second direction, wherein an opening 14 branches off from the first gas channel 11 and leads to a bypass channel 21 for the valve 19, and a second valve 15, 16 to open or close the bypass channel 21.

[0070] The Figure 1 and 1b The gas control device 10 shown in the disclosure is for

[0071] The invention is intended for use in a ventilator and comprises a first gas channel 11 (inspiratory branch) which guides a gas flow towards a patient. The first gas channel 11 comprises a check valve 19 and an opening with a seal. The opening and the seal are in the Figure 1 covered by a closure cap 16. The check valve 19 prevents the recirculation of a respiratory gas or gas stream coming from the patient and contaminated by exhalation.

[0072] In addition, the gas control device 10 has a second gas channel 12 that conducts a gas flow to the opening. The second gas channel 12 is connected via a connector 20 to the closure cap 16, which is clipped onto the opening of the first gas channel. The second gas channel 12 extends via the connector 20 to the closure cap 16 and is controlled by a switching device. A gas flow can flow through the second gas channel 12.

[0073] The switching device can open or close the second gas channel 12. In doing so, the switching device opens the second gas channel 12 for a gas flow, a gas pressure, or a gas flow volume. During normal operation of the ventilator, the second gas channel 12 is open, so that the gas flow or pressure can be directed via the connection 20 to the seal inside the closure cap 16. The gas flow or pressure of the second gas channel 12 presses the seal completely onto the opening, thus closing the opening. During normal operation of the ventilator, in which there is no blockage, this prevents an inspiratory gas flow from the first gas channel 11, which is intended to be directed to the patient, from flowing out through the opening into the bypass channel 21. This is not necessary in this case, since the expiratory branch is unblocked, so that the patient's exhaled breathing gas can be delivered via the expiratory branch.

[0074] If an expiratory branch of the ventilator is blocked or malfunctioning, however, the patient's exhalation is prevented or made more difficult. The check valve 19 also prevents the patient from exhaling via the inspiratory branch. If the expiratory branch of the ventilator is blocked or malfunctioning, the switching device blocks the second gas channel 12. Due to the blocked gas channel 12, the gas flow of the second gas channel 12, which acts on the seal, comes to a standstill, whereby the gas flow of the first gas channel 11 can lift the seal resting on the opening, so that the gas flow of the first gas channel is guided around the check valve via a bypass channel 21. In this case, the gas flow or pressure of the first gas channel 11 is greater than the gas flow or pressure of the second gas channel 12, whereby the gas flow of the first gas channel 11 can lift the seal resting on the opening.The seal is dimensioned and designed such that the gas flow of the first gas channel 11 can lift it when the gas channel 12 is blocked. Lifting means that the seal is held circumferentially at its peripheral edge by the closure cap 16 on the edge of the bypass channel 21 and is pushed upwards toward the center of the circular seal by the gas flow of the first gas channel 11. The weight of the seal is proportioned such that it automatically rests on the opening when the gas flow of the second gas channel 12 decreases.

[0075] The patient can therefore exhale even if the expiratory branch is blocked or disturbed.

[0076] In a leakage system, the switching device blocks the second gas channel or prevents pressure from being applied to the seal. In this case, the switching valve is designed to allow gas to flow out continuously.

[0077] In a valve system, the switching device is configured to switch according to the time-controlled expiration of the ventilator. Thus, the switching device is configured to block the second gas channel 12 when the ventilator is switched to expiration. This ensures the patient's expiration, as the opening of the gas control device is open during expiration, allowing backflowing gas to escape through the opening.

[0078] During normal operation of the expiratory branch of the ventilator, the switching device opens the second gas channel 12, allowing a gas flow into the second gas channel 12 and applying pressure. The gas flow in the second gas channel 12 seals the opening, preventing inspiratory gas from escaping through the opening during normal operation.

[0079] In the present embodiment, the closure cap 16 comprises three extensions 18, by means of which the closure cap 16 can be clipped onto the opening of the first gas channel 11. Furthermore, a connection 20 is formed on the closure cap, to which the second gas channel 12 can be connected. The connection 20 is arranged centrally on the closure cap 16, so that the gas flow or pressure can be applied centrally and evenly to the seal via the connection 20 and the closure cap 16.

[0080] The Figure 1bThe gas control device 10 shown is thus configured, during normal operation, to direct the gas flow in the first gas channel 11 to the patient through the check valve 19. During normal operation of the expiratory branch, the opening of the first gas channel 11 is closed, and the function of the check valve 19 remains intact. If the check valve 19 is blocked or malfunctions, the gas control device 10 bypasses the check valve 19.

[0081] The switching device of the gas control device 10 is triggered by the time-controlled switching of the ventilator between inspiration and expiration. Typically, the switching device blocks the second gas channel 12 as soon as the ventilator switches to expiration. Optionally, the switching can be delayed. Typically, the switching device releases the second gas channel 12 when the ventilator switches to inspiration.

[0082] In the Figure 1bThe bypass channel 21 is also shown. The bypass channel 21 extends from the opening and allows the gas flow flowing out of the opening to be guided past the check valve 19. The bypass channel 21 is formed circumferentially around the opening and narrows as it continues to a channel that extends in a direction parallel to the first gas channel. The bypass channel 21 can then open back into the first gas channel or, as a separate branch, discharge the gas flow guided past the check valve.

[0083] The bypass channel has an edge in the area of ​​the opening, which can be sealed by the seal provided by the closure cap 16. The edge of the bypass channel 21 can have a protrusion that can engage with an edge of the seal. The edge of the bypass channel 21 prevents the seal from slipping.

[0084] Figure 2 shows a schematic exploded view of the Figure 1 shown gas control device 10. The first and second gas channels 11, 12, the check valve 19 and the opening 14 with the seal 15 are shown.

[0085] Also shown is the closure cap 16 with the connection 20. The central arrangement of the connection 20 is shown, with one end of the connection 20 extending outwards and being connectable to the second gas channel 12.

[0086] In the Figure 2 It is shown that the opening 14 has an edge 22. The edge 22 is designed as an elevation and serves as a support for the weight 17 integrated into the seal 15.

[0087] The seal 15 is made of an elastomeric material, preferably a silicone with a hardness between 15 and 25 Shore A, in particular between 18 and 22 Shore A. The seal 15 is circular and has a boundary 23.

[0088] The boundary 23 can be designed as a reinforced structure or as a functional highlight. The boundary 23 is configured to rest on an edge 24 of the bypass channel 21. The seal 15 can have a thinner material thickness between the boundary 23 of the seal 15 and the weight 17 than in the region of the edge 24 of the bypass channel 21 and the region of the seal 15 in which the weight 17 is arranged, usually integrally.

[0089] In the present embodiment, the seal 15 between the edge 24 of the bypass channel 21 and the weight 17 has a curved structure, which can additionally prevent displacement of the seal 15 on the opening 14. In further embodiments, the seal 15 between the edge 24 of the bypass channel 21 and the weight 17 can have a different structure or be designed without a structure.

[0090] The weight 17 of the seal 15 is in the form of a washer. The weight 17 is made of metal and is integrally formed with the seal 17. The weight 17 stabilizes the seal 15 on the opening 14.

[0091] When the closure cap 16 is placed on the opening 14, the seal 15 is pressed and held against the edge of the bypass channel 21 in the area of ​​the boundary 23 of the seal 15. The closure cap 16 seals the seal 15 to the outside and holds the seal 15 in its position within the closure cap 16. The seal 15 is thus pressed or held within the gas control device 10 by the clipped-on closure cap 16 onto the edge 24 of the bypass channel 21. The seal 15 is clamped or sealed between the edge 24 of the bypass channel 21 and the closure cap 16 via the circumferentially formed, reinforced boundary 23.

[0092] Areas of the seal 15 that differ from the boundary 23 are designed to be non-contact with the closure cap 16. These areas can also be referred to as pressure areas, since when the second gas channel 12 is opened by the switching device, these areas of the seal 15 are subjected to a gas flow or pressure.

[0093] The seal 15 is held in a resting state (without gas flows) by its weight and its structure on the opening 14. If the switching device is configured to release the second gas channel 12, the pressure areas of the seal 15 are additionally subjected to a gas flow or pressure, whereby the seal 15 seals the opening 14.

[0094] If the switching device is configured to block the second gas channel 12, the pressure areas of the seal 15 are not subjected to a gas flow, so that the gas flow of the first gas channel 11 is sufficient to lift the seal in the area of ​​the pressure areas and to guide the gas flow into the bypass channel 21.

[0095] The Figure 2 The closure cap 16 shown comprises projections 18 which form barbs. When the closure cap 16 is clipped on, the barbs engage in recesses formed on the outside of the gas control device 10. In further embodiments, further closure options are conceivable, for example a locking mechanism in the form of a bayonet lock. Figure 2 the check valve 19 and the bypass channel 21 are shown.

[0096] Figure 3 shows a longitudinal section through the Figures 1 and 2shown gas control device 10. Shown are the first gas channel 11 with the check valve 19, the opening 14 and the seal 15 as well as the second gas channel 12. In addition, the closure cap 16 with the connection 20 and the bypass channel 21 are shown.

[0097] An inspiratory gas flow can be delivered to the patient via the first gas channel 11. The check valve 19 prevents exhaled gas from flowing back into the ventilator via the first gas channel 11. If the expiratory branch of the ventilator is blocked or malfunctioning, no exhalation of the gas flow or exhaled gas can occur via the first gas channel 11.

[0098] Also shown is the bypass channel 21, which extends from the opening 14. The bypass channel 21 is designed as a circumferential channel around the opening 14 and extends further into a channel that extends in a direction parallel to the first gas channel 11. Due to the circumferential arrangement of the bypass channel, a large amount of exhaled gas can be discharged simultaneously around the check valve 19 and through the opening 14. The bypass channel 21 can open into the inspiratory branch or be designed as a separate expiratory branch.

[0099] The seal 15 is circular and has a weight 17 at its center. The weight 17 is ring-shaped or washer-shaped. The weight 17 has a conical configuration in its shape-dependent recess, which extends in the direction of the first gas channel 11. The conical configuration offers the advantage that the seal 15 is secured against slipping in its position on the opening 14. In further embodiments, the configuration of the seal 15 can have a different geometric shape that is suitable for holding the seal 15 in its position. The weight 17 is integrated into the seal 15. The seal 15 has a greater material thickness in the area of ​​the weight 17.This offers the advantage that the weight 17 can be integrated into the seal 15, and the advantage that the increased material thickness creates an additional weight 17 that holds the seal 15 in position. The weight 17 can also be applied to the seal 15.

[0100] The Figure 3 The closure cap 16 shown is arranged on the opening 14, wherein the closure cap 16 presses the seal 15 onto the edge of the bypass channel 21 in the region of the boundary 23, while the seal 15 is arranged in the application areas without contact with the closure cap 16.

[0101] Figure 4a shows a side view of the Figures 1 to 3 shown gas control device 10. Shown are the first gas channel 11 as well as the closure cap 16 with the extensions 18 and the connection 20 for the second gas channel.

[0102] In the Figure 4aIt can be seen that the inlet side of the first gas channel 11 is larger than the outlet side. In addition to the first gas channel 11, the inlet side also includes the bypass channel 21, which is narrowed to a single channel. Thus, the inlet side of the first gas channel 11 includes both the first gas channel 11, which is oriented in the direction of inspiration flow, and the bypass channel 21, which is oriented opposite to the direction of inspiration flow.

[0103] Figure 4b shows a plan view of the disclosed closure cap 16 of the Figures 1 to 4b shown inventive gas control device 10. The closure cap 16 can be clipped onto the opening of the first gas channel. When the closure cap 16 is clipped on, the seal in the area of ​​the weight of the closure cap 16 is pressed onto a - in Figure 3 shown - elevation 22 of the opening is pressed and sealed.

[0104] The closure cap 16 has a connection 20 for the second gas channel 12. The gas flow from the second gas channel 12 can be applied to the seal via the connection 20 to close the opening. The closure cap 16 further comprises extensions 18, which usually form barbs and are designed to engage in recesses in the region of the opening. In further embodiments, the closure cap 16 can have additional extensions 18 or can be fastened to the opening via similar locking elements.

[0105] Figure 4c shows a top view of the check valve 19 of the Figures 1 to 4bshown gas control device 10 according to the disclosure. The view is taken from the direction of the incoming gas flow, in the inspiration flow direction, towards the check valve 19. Also shown is the bypass channel 21, via which the gas flow can be bypassed around the check valve 19 in the event of a blockage or disruption of the expiratory branch of the ventilator.

[0106] Also shown is the closure cap 16 in side view with the extensions 18, by means of which the closure cap 16 can be clipped onto the opening. List of reference symbols

[0107] 1 Ventilator 10 Gas control device 11 First gas channel 12 Second gas channel 13 Switching device, valve block 14 Opening 15 Seal, second valve 16 Cap, second valve 17 Weight 18 Extension of the cap 19 First valve, check valve 20 Connection 21 Bypass channel 22 Edge of the opening, elevation 23 Limitation of the seal 24 Edge of the bypass channel 27 Ventilation hose 28 Hose connector 29 Surroundings 30 (Breathing) gas source, fan

Claims

1. A gas control device (10) for a ventilator (1), comprising a first gas channel (11) with a first valve (19), wherein the first gas channel (11) and the first valve (19) are configured to let a pressurized gas stream pass in a first direction and to block a pressurized gas stream in a second direction, wherein the gas stream in the first direction is respiratory gas of an inspiration and the gas stream in the second direction is respiratory gas of an expiration, wherein an opening (14) branches off from the first gas channel (11) and leads to a bypass channel (21) for the first valve (19), wherein a second valve (15, 16) is configured to block and / or at least temporarily enable a gas stream from the first gas channel (11) to the bypass channel (21), wherein a switching apparatus (13) is configured to control the second valve (15, 16) in order to block and / or at least temporarily enable a gas stream from the first gas channel (11) to the bypass channel (21), wherein a seal (15) is configured to close or open a gas-conducting connection between the opening (14) and the bypass channel (21), wherein the seal (15) is arranged so as to rest on the opening (14) and comprises a weight (17), which is formed in the shape of a ring in the center of the seal (15), wherein the seal (15) is formed from an elastomer material and the weight (17) is formed from a metal.

2. The gas control device (10) according to claim 1, wherein the first valve (19) is a pneumatically actuated check valve (19), which can be actuated by the force of the pressurized gas stream in the second direction so that the gas stream cannot pass the check valve (19) in the second direction.

3. The gas control device (10) according to claim 2, wherein a respiratory gas source (30) is configured to suck in respiratory gas from the environment (29) and convey it along the first gas channel (11) for the inspiration in the first direction to a hose connector (28) and a ventilation hose (27), wherein the gas stream passes the open check valve (19).

4. The gas control device (10) according to one of the preceding claims, wherein the switching apparatus (13) is configured to open the second valve (15, 16) so that at least some of the pressurized gas stream of the expiration passes through the opening (14) and the bypass channel (21) into the environment (29).

5. The gas control device (10) according to one of the preceding claims, wherein the seal (15) is configured such that - when a control pressure is applied - it lies on an edge (22) of the opening (14) in a sealing manner and thus prevents a gas stream from flowing from the opening (14) into the bypass channel (21).

6. The gas control device (10) according to one of the preceding claims, wherein the second valve (15, 16) is designed as a pneumatic valve, wherein a second gas channel (12) is configured to conduct a pneumatic control pressure onto the surface of the seal (15).

7. The gas control device (10) according to claim 6, wherein the second gas channel (12) is pneumatically connected to a ventilation hose (27) or the first gas channel (11) or a fan (30), and the switching apparatus (13) is configured to at least temporarily open or close the pneumatic connection.

8. The gas control device (10) according to claim 6 or 7 related to claim 2, wherein the switching apparatus (13) is configured to control a gas stream or pressure of the second gas channel (12) and to enable the gas stream of the first gas channel (11) to go past the check valve (19) and through the opening (14).

9. The gas control device (10) according to one of claims 6 to 8, wherein the switching apparatus (13) is configured to release or block the second gas channel (12), and / or wherein the seal (15) is formed to enable the gas stream of the first gas channel (11) to flow through the opening (14) when a second gas channel (12) is blocked.

10. The gas control device (10) according to one of claims 6 to 9, also comprising a closure cap (16), which is configured such that it can be placed onto the opening (14), wherein the closure cap (16) comprises a connection (20) that can be connected to the second gas channel (12).

11. The gas control device (10) according to one of claims 6 to 10, wherein the switching apparatus (13) is configured, during normal operation of an expiratory branch, to release the second gas channel (12) and to conduct a gas stream or pressure onto the seal (15) via the second gas channel (12) and a connection (20) and thus to close the opening (14) and / or, when there is a blockage or malfunction of an expiratory branch, to block the second gas channel (12) and thus to open the bypass channel (21) for expiratory respiratory gas.

12. The gas control device (10) according to one of claims 6 to 11, wherein the second valve (15, 16) comprises the seal (15), which is configured to enable a gas stream of the first gas channel (11) to pass through the opening (14) when a second gas channel (12) is blocked.

13. The gas control device (10) according to one of the preceding claims, wherein the seal (15) has a bulge pointing in the direction of the gas channel (11) in the region of the weight (17).

14. The gas control device (10) according to one of the preceding claims, also comprising a valve block (13) with the first gas channel (11), a second gas channel (12), the first valve (19), and the second valve (15, 16), wherein the first gas channel (11) has the first valve (19) and the opening (14), wherein the second gas channel (12), as a connection for a control pressure, is assigned to the second valve (15, 16) for blocking and / or enabling the gas stream from the first gas channel (11) to the bypass channel (21).

15. A ventilator (1), comprising a gas control device (10) according to one of the preceding claims.