Artificial respiration device with sound damping device

Abstract

The invention relates to a breathing apparatus having at least one sound damping device, comprising a housing having at least one apparatus inlet and at least one apparatus outlet, and at least one channel for conducting a breathing gas, the channel being formed between the apparatus inlet and the apparatus outlet, at least one breathing gas source for generating a breathing gas flow is arranged in or on the channel, such that the channel comprises at least one inspiration side having an inspiration channel in which the breathing gas flow leads from the device inlet to the breathing gas source, and at least one pressure side having an exhaust channel in which the breathing gas flow leads from the device inlet to the breathing gas source, the sound waves propagate in the sound direction from the breathing gas source in the direction towards the device inlet and thus opposite the flow direction, the breathing gas flow in the discharge channel leads from the breathing gas source to the device outlet, and the sound waves propagate in the sound direction from the breathing gas source in the direction towards the device outlet and thus the same as the flow direction, a sound damping device is arranged in or on the inspiration channel on the inspiration side and / or in or on the discharge channel on the pressure side, the sound damping device being configured and designed to damp sound waves propagating in the same direction and / or counter direction to the flow direction of the breathing gas.

Description

Background Technology

[0001] Artificial respiration devices are used both clinically and in the home. They can be used for artificial respiration, anesthesia, treatment of sleep disorders, respiratory support, and cough support. Each device has a flow channel with an inlet and an outlet, and a fan located therein to generate airflow for breathing. For this purpose, at least one rotatable fan impeller, driven by a motor, is typically arranged within the fan housing.

[0002] To ensure that artificial respiration, respiratory therapy, or respiratory support is not perceived as intrusive, the operating noise of the artificial respiration equipment should be as low as possible. Operating noise is generated by sound waves, such as those produced by fans, impellers, motors, air ducts, and cooling fans.

[0003] Artificial respiration devices equipped with silencing foam are known from the prior art. EP 3 708 208 A2, for example, shows a device for artificial respiration having pneumatic tubing and absorbent foam for silencing. However, it has been found that some foams may have negative effects on the patient's health. Summary of the Invention

[0004] Therefore, the objective of this invention is to provide an artificial respiration device that is particularly quiet and safe to operate.

[0005] This task is accomplished by the artificial respiration device according to claim 1 and the sound damping device for the artificial respiration device according to claim 28. Extended solutions and advantageous configurations are the subject of the dependent claims. Further advantages and features will emerge from the general description and the description of embodiments.

[0006] It should be noted that the features listed individually in the claims can be combined with each other in any technically meaningful manner, demonstrating other configurations of the invention. The specification, in particular, provides additional feature descriptions and detailed explanations of the invention in conjunction with the accompanying drawings.

[0007] The dependent claims relate to various independent and advantageous extensions of the invention, the features of which can be freely combined by those skilled in the art to the extent that is technically meaningful. This also applies particularly to claims that cross different categories.

[0008] This invention relates to a respiratory device having at least one sound damping device, wherein the respiratory device comprises a housing having at least one device inlet and at least one device outlet, and at least one channel for guiding respiratory gas, wherein the channel is configured between the device inlet and the device outlet, wherein at least one respiratory gas source for generating a respiratory airflow is arranged in or on the channel, such that the channel includes at least one inhalation side having an inhalation channel and at least one pressure side having an exhaust channel, wherein the respiratory airflow in the inhalation channel is guided from the device inlet to the respiratory gas source, and sound waves propagate along the sound direction from the respiratory gas source in the direction toward the device inlet and thus opposite to the flow direction, wherein the respiratory airflow in the exhaust channel is guided from the respiratory gas source to the device outlet, and sound waves propagate along the sound direction from the respiratory gas source in the direction toward the device outlet and thus in the same direction as the flow direction, characterized in that the sound damping device is arranged on the inhalation side in or on the inhalation channel and / or on the pressure side in or on the exhaust channel, wherein the sound damping device is configured and constructed to dampen sound waves propagating in the same direction as and / or opposite to the flow direction of the respiratory gas.

[0009] In some embodiments, the artificial respiration device is characterized in that the inhalation channel and / or the exhaust channel include at least one, preferably at least two, and particularly preferably multiple sound damping devices.

[0010] In some embodiments, the artificial respiration device is characterized in that the sound damping device includes at least one chamber having at least one opening, the chamber being pneumatically coupled to the channel through the opening such that at least a portion of the breathing gas guided through the channel flows into the chamber; wherein the chamber includes at least one baffle element, the baffle element being configured to reflect, in particular, multiple times, sound waves entering the chamber.

[0011] In some embodiments, the artificial respiration device is characterized in that the baffle element is configured or arranged such that sound waves entering the chamber are reflected at least twice, preferably at least four times, particularly preferably at least six times, and especially ten times or more.

[0012] In some embodiments, the artificial respiration device is characterized in that the chamber includes at least one curved baffle element, and / or the chamber includes at least one first baffle element and a second baffle element, the first baffle element and the second baffle element being oriented relative to each other at an angle β.

[0013] In some embodiments, the artificial respiration device is characterized in that the chamber has a basic geometric shape selected from the group consisting of: circle, ellipse, angular, trapezoid, triangle, quadrilateral, and polygon.

[0014] In some embodiments, the artificial respiration device is characterized in that the curved baffle element surrounds the chamber such that the chamber is configured to be substantially circular or elliptical and has an opening for pneumatic connection with the channel.

[0015] In some embodiments, the artificial respiration device is characterized in that the radius of curvature of the curved baffle element is not constant.

[0016] In some embodiments, the artificial respiration device is characterized in that the angle β is greater than 0°, wherein the angle β is preferably in the range of 0.1° to 90° (inclusive), more preferably in the range of 5° to 70° (inclusive), and particularly in the range of 15° to 45°.

[0017] In some embodiments, the artificial respiration device is characterized in that the inhalation channel has a channel wall surrounding an inner cavity of the inhalation channel, and the discharge channel has a channel wall surrounding an inner cavity of the discharge channel.

[0018] In some embodiments, the artificial respiration device is characterized in that a first baffle element is oriented relative to the channel wall at a first angle α1, wherein the first angle α1 is greater than 0° and less than 180°, wherein the first angle α1 is preferably in the range of 90° (inclusive) to 180°, particularly preferably in the range of 90° (inclusive) to 160°, more preferably in the range of 100° to 140°, and especially in the range of 110° to 130°.

[0019] In some embodiments, the artificial respiration device is characterized in that the second baffle element is oriented relative to the channel wall at a second angle α2, wherein the second angle α2 is greater than 0° and less than 180°, wherein the second angle α2 is preferably in the range of 20° to 180°, more preferably in the range of 60° to 160°, and particularly in the range of 80° to 140°.

[0020] In some embodiments, the artificial respiration device is characterized in that the first angle α1 and the second angle α2 are preferably different in size, wherein the deviation between the first angle α1 and the second angle α2 is greater than 0.1°, particularly preferably greater than 5°, and more preferably greater than 10°.

[0021] In some embodiments, the artificial respiration device is characterized in that the sound waves are deflected by reflection on the baffle element such that the direction of the sound is at an angle γ to the direction of the flow of the breathing gas, wherein the angle γ is in the range of 50° to 130°, preferably in the range of 70° to 110°, and more preferably in the range of 80° to 100°.

[0022] In some embodiments, the artificial respiration device is characterized in that the baffle elements are preferably arranged relative to each other such that the direction of the sound forms an angle γ of approximately 90° with the direction of the flow of the breathing gas.

[0023] In some embodiments, the artificial respiration device is characterized in that the channel wall of the inhalation channel and / or the channel wall of the exhaust channel are configured as double walls, having an inner channel wall and an outer channel wall.

[0024] In some embodiments, the artificial respiration device is characterized in that the inner channel wall and the outer channel wall are reversibly or irreversibly connected to each other, preferably reversibly connected.

[0025] In some embodiments, the artificial respiration device is characterized in that the sound damping device includes a channel, wherein the channel is constructed in the inner channel wall and configured to provide a pneumatic connection between the channel of the artificial respiration device and the chamber.

[0026] In some embodiments, the artificial respiration device is characterized in that the outer channel wall is configured to form at least one chamber of the sound damping device in conjunction with the inner channel wall, wherein the outer channel wall includes the at least one baffle element.

[0027] In some embodiments, the artificial respiration device is characterized in that the chamber is closed at least on both sides by the first baffle element and the second baffle element, wherein the baffle elements are arranged opposite each other, and wherein the chamber has two openings.

[0028] In some embodiments, the artificial respiration device is characterized in that the opening is configured such that the breathing gas flows into the chamber through a first opening along the flow direction and flows out of the chamber through a second opening, wherein the baffle elements are oriented relative to each other such that the sound waves are separated from the mainstream of the breathing gas by reflection on the first baffle element and are retained in the chamber.

[0029] In some embodiments, the artificial respiration device is characterized in that at least one slat is arranged in the inner cavity of the discharge channel, preferably at least two, three, four, five, six or more slats.

[0030] In some embodiments, the artificial respiration device is characterized in that the slats at least segmentally divide the discharge channel longitudinally, such that the discharge channel is at least segmentally divided into sub-channels, wherein a sub-channel is constructed between corresponding two slats and / or between the channel wall and a slat.

[0031] In some embodiments, the artificial respiration device is characterized in that the slats are configured such that at least one chamber, which is surrounded on both sides, is formed in the sub-channel, the chamber having a first baffle element and a second baffle element and two openings.

[0032] In some embodiments, the artificial respiration device is characterized in that the chamber includes at least one third baffle element, wherein the chamber is closed on three sides by at least the first baffle element, the second baffle element, and the third baffle element, such that the chamber has only one opening.

[0033] In some embodiments, the artificial respiration device is characterized in that the first baffle element is at least partially disposed in the cavity of the inhalation channel and configured to deflect sound waves at least from the inhalation channel into the cavity.

[0034] In some embodiments, the artificial respiration device is characterized by having at least one element arranged in the inhalation channel adjacent to and / or in or on the device inlet, the at least one element being configured to deflect and / or limit and / or block the direction of the sound, wherein the element is particularly configured and constructed to guide the sound waves into the sound damping device.

[0035] In some embodiments, the artificial respiration device is characterized in that the baffle element is configured or arranged such that the sound waves are retained in the chamber.

[0036] In some embodiments, the channel and all components thereof may be free of foam material and / or nonwoven fabric. The channel may, in particular, be made of a non-porous material. This provides the advantage that the channel, and therefore the breathing gas pathway, is constructed particularly safely for the patient because no harmful substances can form in the channel and / or be released into the breathing gas. Non-porous materials are not corroded by cleaning agents like foam materials, thus making the cleaning, disinfection, or sterilization of the channel simple and safe.

[0037] Overall, such a ventilator offers the advantage that disruptive operating noise is significantly reduced due to the sound damping device, and in particular, it eliminates the need for foam sound insulation materials within the ventilator. This improves patient safety and simplifies the maintenance and cleaning of the ventilator.

[0038] The present invention also relates to a sound damping device for a respiratory device according to claim 28, the respiratory device having at least one channel for guiding respiratory gas, wherein the sound damping device comprises: at least one chamber having at least one opening, the chamber being aerodynamically coupled to the channel through the opening such that at least a portion of the respiratory gas guided through the channel flows into the chamber; wherein the chamber includes at least one baffle element, characterized in that the baffle element is configured to reflect sound waves entering the chamber multiple times. Attached Figure Description

[0039] An embodiment of a sound damping device for an artificial respiration apparatus according to the present invention is shown in the accompanying drawings. It illustrates: Figure 1 A very schematic diagram of an artificial respiration device; Figure 2: Exemplary diagram of a sub-section of the discharge channel, with an embodiment having a sound damping device; Figure 3: An exemplary diagram of a sub-section of the inhalation channel, with a further embodiment having a sound damping device; Figure 4: Schematic view of the channel wall of the sound damping device with a further embodiment; Figure 5: An exemplary diagram of an equipment inlet with a sound damping device. Detailed Implementation

[0040] The following embodiments describe a sound damping device 10 according to the invention for use in an artificial respiration device 1. Other features and advantages of the invention will become clear in the following description of the embodiments with reference to the accompanying drawings. The invention is not limited to the embodiments shown.

[0041] Figure 1A very schematic diagram of a ventilator 1 is shown. In the context of this invention, a ventilator 1 should be understood as all devices that support a patient or other user in natural breathing and / or in artificial breathing and / or for respiratory therapy and / or for inhalation anesthesia and / or otherwise act upon the user's or patient's breathing. Patient and user are used synonymously herein and refer to any individual using the ventilator 1. The ventilator 1 may be, for example—but not limited to—ventilator for clinical or home use, respiratory therapy device, CPAP (Continuous Positive Airway Pressure), APAP (Automatic Positive Airway Pressure), and BiLevel devices, high-flow therapy devices, anesthesia devices, clinical, outpatient, or emergency ventilator devices, oxygen supply devices, diagnostic systems, and cough treatment devices or cough machines.

[0042] The artificial respiration device 1 has a housing 2. The housing 2 has at least one device inlet 20 and at least one device outlet 40. The artificial respiration device 1 has at least one channel 7 with a channel wall 13. The channel 7 is constructed inside the housing 2. The channel 7 is constructed between the device inlet 20 and the device outlet 40. The channel 7 is established and configured to guide respiratory gas A. In the context of this invention, respiratory gas A includes any fluid, gas, or gas mixture suitable for artificial respiration, breathing, anesthesia, and / or respiratory therapy. Respiratory gas A may be at least partially ambient air. The channel 7 may be divided into at least one inhalation channel 21 and at least one exhaust channel 41.

[0043] Breathing gas A, particularly ambient air, can be fed into channel 7, especially into inhalation channel 21, through at least one device inlet 20. The artificial respiration device 1 may also have multiple device inlets 20 through which other breathing gases, such as fresh gas, oxygen, or anesthetic agents (not shown), can be introduced into channel 7, alternatively or additionally. For this purpose, in some embodiments, at least one connection unit (not shown) may be arranged at the device inlet 20 for connecting a hose or hose system through which breathing gas (fresh gas, oxygen, anesthetic agent) can be introduced into channel 7. Channel 7 may be made of a non-porous material and / or constructed without foam insulation. At least one filter 6 may be arranged in or on the device inlet 20 to filter the fed breathing gas A, particularly the fed ambient air. In some embodiments, a filter system consisting of multiple filters 6 may also be arranged in or on the device inlet 20. The filters 6 are established and constructed to filter out any possible solid particles from the introduced fluid.

[0044] Breathing gas can be released from channel 7 through device outlet 40 and delivered to the patient, for example, through a tubing system and / or through a patient interface. Figure 1As implied by the schematic view, the device inlet 20 and device outlet 40 do not necessarily have to be located on two opposing sidewalls of the housing in the configuration. More precisely, it is advantageous that the breathing gas is guided through the housing via a longer path by multiple deflections, thereby reducing noise. Therefore, the channel 7 is generally advantageously not to extend in a straight line.

[0045] At least one connection unit 5 may be arranged at the device outlet 40. The connection unit 5 is configured to connect a hose system and / or patient interface (not shown) to the artificial respiration device 1. The hose system and / or patient interface may be pneumatically connected to the channel 7 of the artificial respiration device 1. Here, the hose system is also set and configured to guide breathing gas A, so that breathing gas A of the artificial respiration device 1 can be delivered to the patient or user through the hose system.

[0046] For connection to a patient, a patient interface can be connected to the tubing system or to the artificial respiration device 1. In the context of this invention, a patient interface should be understood as any peripheral device configured for interaction with a living organism. In particular, the patient interface is configured for connection to the artificial respiration device 1 for therapeutic and / or diagnostic purposes. The patient interface can be configured as a breathing mask. This includes, for example (but not limited to), nasal masks, nasal pillow masks, nasal cannulas or oxygen nasal cannulas, full-face masks, and endotracheal tubes or cannulas.

[0047] At least one breathing gas source 3 is arranged in or on channel 7. Breathing gas source 3 may be or include at least one pressurized gas interface. In some embodiments, breathing gas source 3 may also be a valve unit or a fan unit having one or more fans. Breathing gas source can particularly be fan 3. Fan 3 includes at least one fan impeller (not shown here), which generates a breathing gas flow for artificial respiration, anesthesia, or respiratory therapy. Channel 7 can be divided into an inhalation side 8 and a pressure side 9 by fan 3. Inhalation side 8 is located upstream of fan 3. Pressure side 9 is located downstream of fan 3.

[0048] The fan 3 is controlled by a control device 4. The control device 4 is typically located inside the artificial respiration device 1. For example, the control device 4 sets a specific rotational speed of the fan impeller according to preset treatment values ​​and / or artificial respiration conditions, or adjusts the fan speed to a target value. The rotational speed of the fan impeller can adaptively adapt to the corresponding conditions under artificial respiration, anesthesia, or respiratory support.

[0049] Fan 3 was then set up and configured to generate a breathing airflow with a flow direction R1. Breathing gas (such as...) Figure 1The airflow (as indicated by the square arrow) flows along at least one flow direction R1. Flow direction R1 typically leads from the device inlet 20 to the device outlet 40. Flow direction R1 typically leads from the intake side 8 of the fan 3 to the pressure side 9. The channel 7 and / or the breathing airflow typically does not extend in a straight line. The breathing gas can be deflected at least once, advantageously multiple times (not shown), within the channel 7. Deflection of the flow can reduce noise.

[0050] Channel 7 can be divided into at least one intake channel 21 and at least one exhaust channel 41. Intake channel 21 extends from equipment inlet 20 to fan 3. Intake channel 41 is located upstream of fan 3. Intake channel 41 is constructed on the intake side 8 of fan 3. Exhaust channel 41 extends from fan 3 to equipment outlet 40. Exhaust channel 41 is located downstream of fan 3. Exhaust channel 41 is constructed on the pressure side 9 of fan 3. Breathing gas A can be delivered from equipment inlet 20 to fan 3 via intake channel 21. Breathing gas can be delivered from fan 3 to equipment outlet 40 via exhaust channel 41. For example, ambient air can be drawn into intake channel 21 through equipment inlet 20 and delivered to equipment outlet 40 via exhaust channel 41, wherein fan 3 provides energy for generating the breathing airflow.

[0051] The artificial respiration device 1 may have at least one sound damping device 10 according to the invention (see Figures 2-5). The sound damping device 10 may be configured on the inspiratory side 8 and / or the pressure side 9. The sound damping device 10 may be configured in or on the channel 7 of the artificial respiration device 1. The sound damping device 10 may be configured as an integrated component of the channel 7. In particular, the sound damping device 10 may be alternatively or additionally arranged in the channel wall 13 of the channel.

[0052] Figures 2 to 5 illustrate embodiments of a sound damping device 10 for a respiratory device 1. The respiratory device includes at least one sound damping device. The respiratory device has a housing with at least one device inlet and at least one device outlet, and includes at least one channel for guiding respiratory gas. The channel is configured between the device inlet and the device outlet. At least one source of respiratory gas for generating a respiratory airflow is arranged in or on the channel. The channel includes at least one inspiratory side having an inhalation channel and at least one pressure side having an exhaust channel. The respiratory airflow flows from the device inlet to the respiratory gas source in the inhalation channel. Sound waves in the inhalation channel generally propagate substantially in a sound direction from the respiratory gas source toward the device inlet and therefore opposite to the flow direction. In the exhaust channel, the respiratory airflow flows from the respiratory gas source to the device outlet. Sound waves in the exhaust channel generally propagate substantially in a sound direction from the respiratory gas source toward the device outlet and therefore in the same sound direction as the flow direction. The sound damping device is arranged in or on the inhalation side in the inhalation channel and / or in or on the pressure side in the exhaust channel. The sound damping device is designed and constructed to dampen sound waves that propagate in the same direction as and / or in the opposite direction to the flow direction of the breathing gas.

[0053] The sound damping device 10 includes at least one channel 11 for guiding breathing gas. The channel 11 of the sound damping device 10 may correspond to the channel 7 of the artificial respiration device 1 and / or be configured as an additional channel 11 connectable to the channel 7 of the artificial respiration device 1. The sound damping device 10 includes at least one chamber 12 having at least one opening 19, the chamber being pneumatically coupled to the channel 7 through the opening, such that at least a portion of the breathing gas A guided through the channel 7 flows into the chamber 12.

[0054] The chamber 12 includes at least one baffle element 14, 15, 16, 17, 18. The baffle elements 14, 15, 16, 17, 18 are arranged and configured to reflect sound waves S entering the chamber 12 multiple times. The baffle elements 14 and 15 are arranged relative to each other such that the sound waves S entering the chamber 12 are reflected multiple times at the baffle elements 14 and 15, thereby reducing sound.

[0055] Sound reduction can be achieved through damping and / or sound insulation and / or sound wave superposition (interference) and / or absorption. The term "sound damping" is sometimes used herein as a general term for all physical effects capable of reducing sound. In particular, sound damping in the sense of this invention includes sound damping by reflection, sound insulation by absorption, and sound cancellation by destructive interference. Sound reduction is preferably achieved through reflection.

[0056] Figure 2 shows an exemplary diagram of a subsection of the discharge channel 41, with an embodiment having a sound damping device 10. The sound damping device 10 may be constructed in or on the discharge channel 41 of the pressure side 9 of the blower 3. Since the operating noise of the artificial respiration device 1 is generated, for example by the blower 3, by the impeller, or by the motor, the sound direction R2 in the discharge channel 41 generally propagates from the inside of the device to the device outlet 40. In the figures, the flow direction R1 of the breathing gas is indicated by a block arrow, while the sound direction R2 is indicated by a simple arrow.

[0057] from Figure 2A -E As can be seen, the sound wave S in the discharge channel 41 first propagates in the same direction R2 as the flow direction R1 of the breathing gas, that is, it propagates from inside the equipment, for example from the fan 3 toward the equipment outlet 40.

[0058] To minimize the operating noise of the artificial respiration device 1, it is advantageous that no sound wave S reaches the device outlet 40. The sound damping device 10 is configured to block the path of the sound wave S. The sound damping device 10 is also configured to allow breathing gas to pass through the device outlet 41.

[0059] The discharge channel 41 is defined by a channel wall 42. The channel wall 42 surrounds the inner cavity 43 of the discharge channel 41 through which breathing gas A can be guided. The inner cavity 43 of the discharge channel 41 can be constructed without other components. Subsequently, the channel wall 42 itself can construct a sound damping device 10. Figure 2A / B).

[0060] according to Figure 2A / B, In its simplest embodiment, the sound damping device 10 may include a channel 11, a chamber 12, a first baffle element 14, and a second baffle element 15. In this embodiment, the channel 11 of the sound damping device 10 corresponds to an inhalation channel 41. The channel 11 is configured to guide breathing gas. Sound waves of the breathing gas may also be transmitted at least partially in the channel 11. The sound damping device 10 is characterized by having at least one chamber 12. The chamber 12 includes at least two baffle elements 14, 15 opposite each other. The first baffle element 14 and the second baffle element 15 construct the chamber 12. The chamber 12 is closed at least on both sides and limited by the baffle elements 14, 15.

[0061] According to the invention, the first baffle element 14 and the second baffle element 15 are arranged relative to each other such that the sound wave S entering the chamber 12 from the channel 11 is reflected multiple times at the baffle elements 14 and 15. Through the reflection of the sound wave, the sound is reduced and / or absorbed and / or damped and / or sound-insulated and / or superimposed.

[0062] To prevent sound waves from leaving chamber 12, the first baffle element 14 and the second baffle element 15 are not parallel to each other. For visual illustration, in... Figure 2B Planes E1, E2, and E3 are drawn in the diagram. Plane E1 represents the primary orientation of the channel wall 42 before and / or after the sound damping device 10. Plane E2 represents the orientation of the first baffle element 14. Plane E3 represents the orientation of the second baffle element 15.

[0063] from Figure 2B As can be seen, the first baffle element 14 (plane E2) is oriented relative to the channel wall 42 (plane E1) at a first angle α1. Here, the first angle α1 is greater than 0° and less than 180°. The first angle α1 can preferably be in the range of 90° (inclusive) to 180°. Preferably, the first angle α1 can be in the range of 90° (inclusive) to 160°, more preferably in the range of 100° to 140°. In a specific embodiment according to the drawings, the first angle α1 can be in the range of 110° to 130°. For example, the first angle α1 is 122°.

[0064] from Figure 2B It can also be seen that the second baffle element 15 (plane E3) is oriented relative to the channel wall 42 (plane E1) at a second angle α2. Here, the second angle α2 is greater than 0° and less than 180°. The second angle α2 can preferably be in the range of 20° to 180°, more preferably in the range of 60° to 160°. Preferably, the second angle α2 can be in the range of 80° (inclusive) to 140°.

[0065] In the specific embodiment according to FIG2, the second angle α2 can be particularly in the range of 100° to 140°, preferably in the range of 120° to 140°. For example, the second angle α2 is 134°.

[0066] In addition, from Figure 2B As can be seen, the second baffle element 15 (plane E3) is oriented at an angle β relative to the first baffle element 14 (plane E2). Angle β describes the angle at which the planes E2 and E3 of the baffle elements 14 and 15 intersect at the imaginary vanishing point F (see...). Figure 2B ).

[0067] The first baffle element 14 and the second baffle element 15 are not parallel to each other, therefore the angle β is greater than 0°. Observing the flow direction R1 of the breathing gas, the first baffle element 14 and the second baffle element 15 are oriented to converge towards each other. Therefore, the basic shape of the chamber 12 is preferably constructed as a trapezoid.

[0068] The angle β can be in the range of 0.1° to 90°. Preferably, the angle β can be in the range of 0.1° to 45°, more preferably in the range of 5° to 30° (inclusive). In a specific embodiment according to the drawings, the angle β can be in the range of 5° to 20°, for example, the angle β is 12°.

[0069] Accordingly, the first angle α1 and the second angle α2 are preferably different in size. Preferably, the deviation is greater than 0.1°, particularly preferably greater than 5°, and more preferably greater than 10°. For example, the deviation between the first angle α1 and the second angle α2 is 12°.

[0070] Baffle elements 14 and 15 can be constructed as flat or curved surfaces. In the embodiment according to Figures 2 to 4, baffle elements 14 and 15 are constructed as flat surfaces. The rule applicable on a flat surface is that sound waves are reflected such that the angle of incidence equals the angle of reflection.

[0071] Baffle elements 14 and 15 are arranged relative to each other such that the sound waves are reflected multiple times. Here, the sound waves from the discharge channel 41 initially strike the first baffle element 14. The first baffle element 14 is configured to reflect the sound waves. The first baffle element 14 is oriented such that the sound waves are guided to the second baffle element 15. Subsequently, the sound waves are reflected by the second baffle element 15. The second baffle element 15 is configured such that it reflects the sound waves. The second baffle element 15 is oriented such that the sound waves are again guided to the first baffle element 14, and so on. Therefore, the sound wave S is retained inside the chamber 12.

[0072] The baffle elements 14 and 15 are arranged relative to each other such that the sound waves are reflected at least twice, preferably at least four times, particularly preferably at least six times, and especially ten times or more. Through multiple reflections, the sound waves can be attenuated by absorption and / or by superposition. Preferably, the sound waves are reflected an unlimited number of times without re-entering channel 11.

[0073] from Figure 2B It can also be seen that the sound wave S is deflected by reflection on the baffle elements 14, 15..., such that the sound direction R2 forms an angle γ with the flow direction R1 of the breathing gas. The angle γ is in the range of 50° to 130°, preferably in the range of 70° to 110°, and more preferably in the range of 80° to 100°. The baffle elements 14, 15... can preferably be arranged relative to each other such that the sound direction R2 forms an angle γ of approximately 90° with the flow direction R1 of the breathing gas. Through the arrangement of the baffle elements 14, 15... relative to each other, in some embodiments, the sound waves can preferably be deflected such that they propagate perpendicular to the flow direction of the breathing gas.

[0074] from Figure 2BAs can be seen, by integrating the sound damping device 10, the channel wall 42 does not extend in a straight line, but rather has an offset. This offset caused by the sound damping device 10 blocks the sound waves of the breathing gas without substantially impairing the flow of the breathing gas. The breathing gas can pass through the sound damping device 10, while the sound waves are blocked and / or reduced.

[0075] Figure 2C / D shows an exemplary diagram of a sub-section of the discharge channel 41, featuring a sound damping device 10 and multiple chambers 12. From Figure 2C It can be seen that elements can be arranged in the inner cavity 43 of the discharge channel 41, and these elements can at least segmentally divide the inner cavity. In some embodiments, at least one slat 44 can be arranged in the inner cavity 43. In a preferred embodiment, multiple slats 44 can be arranged in the inner cavity 43, particularly at least two, three, four, five, six or more. According to... Figure 2C In a specific embodiment of / E, six slats 44 may be arranged in the discharge channel 41. The slats 44 may be arranged in the discharge channel 41 such that they divide the discharge channel 41 along the length L.

[0076] In some embodiments, the slat 44 may extend through the entire length of the discharge channel 41, completely dividing the channel 41 into at least two, preferably multiple, sub-channels 11. For example, 100% of the discharge channel 41 may be divided by the slat 44 (not shown). According to... Figure 2C In a specific embodiment of / 2D, the slats 44 are arranged only in a portion of the discharge channel 41. Preferably, less than 100% of the discharge channel 41 is divided by the slats 44, particularly preferably less than 80%, and especially less than 50%.

[0077] According to Figure 2C In a specific embodiment of / 2D, six slats 44 divide the discharge channel 41 into seven channels 11, each containing a chamber 12. It is conceivable to arrange fewer or more slats 44. Through the arrangement of the slats 44, the breathing airflow through the discharge channel 41 can be propagated at least in a segmented manner. When selecting the number of slats 44, consideration should be given to ensuring that the overall cross-section of the discharge channel 41 is not significantly reduced and that a corresponding number of sub-channels 11 are constructed. The combined cross-section of the sub-channels 11 should generally produce an inner diameter of at least 19 mm.

[0078] The discharge channel 41 is divided into at least segmental sub-channels 11 by arranging slats 44 in the discharge channel 41. A channel 11 is constructed between every two slats 44 and / or between the channel wall 42 and the slats 44 of the discharge channel 41. A chamber 12 is constructed within each channel 11. Therefore, the slats 44 are arranged and configured to form at least one sound damping device 10 having at least one channel 11 and one chamber 12. Thus, the slats 44 are arranged and configured such that they open the flow path of breathing gas but block the sound path.

[0079] Figure 2D An example is shown where two adjacent slats 44 can be arranged relative to each other to construct a sound damping device 10. The slats 44 can be divided into segments, such as, for example, a first segment 45, a second segment 46, a third segment 47, and so on.

[0080] The first segments 45 of the slats 44 are arranged relative to each other or relative to the outer wall 42 such that a first sub-segment 11-1 of the channel is formed. Breathing gas, along with the sound wave S of the breathing gas, is introduced into the first sub-segment 11-1 of the channel in the flow direction R1. The first sub-segment 11-1 of the channel is preferably constructed in a straight line.

[0081] The second sections 46 of the slats 44 are arranged relative to each other or relative to the outer wall 42 to form a chamber 12. Here, a chamber 12 is formed as previously described. Figure 2A The chamber 12 is preferably constructed in a trapezoidal shape and is surrounded on both sides by a first baffle element 14 and a second baffle element 15. Here, the second section 46 can respectively construct the first baffle element 14 of the first chamber 12 and the second baffle element 15 of the adjacent second chamber 12 (see...). Figure 2D ).

[0082] The third sections 47 of the slats 44 are arranged relative to each other or with respect to the outer wall 42 to form a second sub-section 11-2 of the channel. Breathing gas is introduced from the chamber 12 into the second sub-section 11-2 of the channel along the flow direction R1. Sound waves are retained in the chamber 12 and advantageously do not enter or only enter a small amount into the second sub-section 11-2 of the channel. The second sub-section 11-2 of the channel is preferably constructed as a straight line. The second sub-section 11-2 of the channel may be constructed to be longer than the first sub-section 11-1 of the channel. The second sub-section 11-2 is configured to eliminate eddies that may be generated by air passing through the chamber 12.

[0083] Figure 2E A perspective view of the discharge channel 41 is shown. Figure 2EAs can be seen, channel 11, through the integrated sound damping device 10 or chamber 12, is not extended in a straight line, at least in sections, but can be offset. This offset blocks the sound waves of the breathing gas without substantially impairing the flow of the breathing gas. The breathing gas can pass through channel 11 of the sound damping device 10, where the sound waves are reduced.

[0084] according to Figure 2A In embodiment -E, the sound damping device 10 is preferably arranged on the pressure side 9 of the exhaust passage 41. In some embodiments, it is conceivable that such an embodiment may also be arranged alternatively or additionally on the inhalation side 8 (not shown) of the inhalation passage 21. In this case, it should be noted that the sound direction R2 in the inhalation passage 21 generally propagates from the inside of the device to the device inlet 20, and is therefore opposite to the flow direction R1 of the breathing gas. Accordingly, the orientation of the sound damping device must be reversed.

[0085] Figure 3 shows an exemplary diagram of a subsection of the inhalation channel 21, with other embodiments having a sound damping device 10. The sound damping device 10 may alternatively or additionally be constructed in or on the inhalation channel 21 of the inhalation side 8 of the blower 3. Since the operating noise of the artificial respiration device 1 is generated, for example by the blower 3, by the impeller or by the motor, the sound direction R2 in the inhalation channel 21 generally propagates in the direction from the inside of the device to the device inlet 20.

[0086] The sound damping device 10 can be implemented in the inhalation channel 21 according to the above embodiment (not shown). Preferably, the sound damping device 10 in the inhalation channel 21 can be configured differently from the sound damping device 10 in the exhaust channel 41 (FIG. 3). As can be seen from FIG. 3, the sound wave S in the inhalation channel 21 propagates substantially in a direction R2 opposite to the flow direction R1 of the breathing gas. The sound wave can propagate from inside the device, for example from the fan 3 toward the device inlet 20. Conversely, when the fan is running, the flow direction R1 of the breathing gas is from the device inlet 20 toward the fan 3.

[0087] To minimize the operating noise of the artificial respiration device 1, it is advantageous that sound waves S do not reach the device inlet 20. The sound damping device 10 is configured to block the path of sound waves S. The sound damping device 10 is also configured to allow breathing gas to pass through the device's interior, i.e., to the fan 3.

[0088] The inhalation passage 21 is defined by a passage wall 22. The passage wall 22 surrounds the inner cavity 23 of the inhalation passage 21 through which breathing gas A can be guided. The inhalation passage 21 may have at least one sound damping device 10, which includes at least one channel 11, a chamber 12, a first baffle element 14, and a second baffle element 15. Preferably, the inhalation passage 21 may have at least two sound damping devices 10, and particularly preferably at least 4, 6, 8, 10, or more.

[0089] like Figure 3B As can be seen, the arrangement of the first baffle element 14 and the second baffle element 15 can be similar to each other and analogous to the arrangement relative to the channel wall 22 previously described with respect to FIG. 2. In this embodiment, the first baffle element 14 (plane E2) is also oriented at a first angle α1 relative to the channel wall 22 (plane E1). The second baffle element 15 (plane E3) is oriented at a second angle α2 relative to the channel wall 22 (plane E1). Here, the second baffle element 15 (plane E3) is oriented at an angle β relative to the first baffle element 14 (plane E2). The first baffle element 14 and the second baffle element 15 are not parallel. The first baffle element 14 and the second baffle element 15 are oriented to converge on each other (see...). Figure 3B ).

[0090] In this embodiment, at least the first baffle element 14 and the second baffle element 15 constitute the chamber 12 (not shown). However, the chamber 12 may also include at least one third baffle element 16, such that the chamber 12 can be closed on three sides and bounded by the baffle elements 14, 15, and 16. The basic shape of the chamber 12 can be configured as a trapezoid (see Figure 3). In some embodiments, other geometries of the chamber 12 are also conceivable. For example, the chamber 12 may have more than three baffle elements 14, 15, and 16, especially 4, 5, 6, 7, 8, or more. Accordingly, the chamber may also have a polygonal basic shape, such as a hexagonal, octagonal, or dodecagonal basic shape. Circular or elliptical chambers 12 are also conceivable (see Figure 5). The shape of the chamber 12 should be chosen such that sound waves are reflected by the baffle elements 14, 15, and 16 as frequently as possible.

[0091] The embodiment according to FIG3 is characterized in that the chamber 12 can be arranged at least regionally outside the actual suction channel 21. Only the first baffle element 14 can be arranged at least regionally within the cavity 23 of the suction channel.

[0092] In the embodiment according to FIG3, the first baffle element 14 may extend at least regionally into the inner cavity 23. The first baffle element 14 is configured to block the path of the sound wave S. The first baffle element 14 is configured to open the path of the breathing gas. The first baffle element 14 is configured to deflect the sound wave S. Here, the first baffle element 14 is oriented such that the sound wave S is led out of the inhalation channel 21 and into the chamber 12. Conversely, the breathing airflow may be drawn from the device inlet 20 to the fan 3 in its main direction R1.

[0093] Baffle elements 14 and 15 are arranged relative to each other such that sound waves are reflected multiple times. Here, sound waves from the intake passage 21 initially strike the first baffle element 14. The first baffle element 14 is set and constructed to reflect sound waves. The first baffle element 14 is oriented such that sound waves are guided into the chamber 12 and reach the second baffle element 15. Multiple reflections of sound waves can occur between the first baffle element 14 and the second baffle element 15 within the chamber 12, so that sound waves S are retained inside the chamber 14. Due to the arrangement of baffle elements 14, 15, and 16, sound waves S cannot re-enter the intake passage 21.

[0094] Preferably, at least two sound damping devices 10 are arranged in or on the inhalation channel 21. Here, the sound damping devices 10 can preferably be arranged on opposite sides. The first baffle elements 14 are arranged such that they overlap in the inner cavity 23 of the inhalation channel 21 (see FIG. 3). This achieves effective sound deflection in the directions of the two chambers 12.

[0095] The end of the first baffle element 14 extending into the inner cavity 23 can extend in a straight line (not shown). In a preferred embodiment, the end of the first baffle element 14 can have a curved end. This can positively influence the flow of respiratory gas A (see Figure 3).

[0096] The diameter of the suction channel 21-D can be constant or variable. The end of the first baffle element 14 extending into the inner cavity 23 can affect the diameter of the suction channel 21-D. Figure 3A As can be seen, the suction channel 21 may have at least one first diameter 21-D1 and a second diameter 21-D2. The first diameter 21-D1 of the suction channel may be less than or equal to the second diameter 21-D2 of the suction channel. In particular, the first diameter 21-D1 of the suction channel may be configured to be smaller than the second diameter 21-D2 of the suction channel. The cross-sectional diameter 21-D1 of the suction channel should generally produce an inner diameter of at least 19 mm.

[0097] According to the embodiment of FIG3, the sound damping device 10 is preferably arranged on the intake side 8 of the intake passage 21. In some embodiments, it is conceivable that such an embodiment may also be arranged alternatively or additionally on the pressure side 9 (not shown) of the exhaust passage 41.

[0098] Figure 4 shows a schematic diagram of the channel walls 22, 42 of the sound damping device 10 with other embodiments, wherein Figure 4A shows an overview of the sub-sections of the channel walls 22, 42, and Figure 4B shows a detailed view of the sound damping device 10 in Figure 4A, and Figure 4C A perspective view of the sub-sections of channel walls 7, 22, and 42 is shown. Figure 4 exemplarily illustrates that the sound damping device 10 can be substantially constructed inside channel walls 22 and 42.

[0099] The channel wall 22 of the inhalation channel 21 and / or the channel wall 42 of the discharge channel 41 can be configured as double walls, having inner channel walls 22, 44 and outer channel walls 22i, 42i respectively. The inner channel walls 22, 44 and the outer channel walls 22i, 42i can be manufactured as a single piece or as two pieces. Preferably, the inner channel walls 22, 44 and the outer channel walls 22i, 42i are manufactured or can be manufactured by at least one injection molding process. Other suitable manufacturing methods may also be used. Preferably, the inner channel walls 22, 44 and the outer channel walls 22i, 42i are at least manufactured as two pieces and subsequently connected to each other. The connection between the inner channel walls 22, 44 and the outer channel walls 22i, 42i can be irreversible or reversible. A reversible connection provides the advantage that the inner channel walls 22, 44 and the outer channel walls 22i, 42i are detachable, which facilitates cleaning, sterilization, disinfection, or similar operations after application. The connection between the inner channel walls 22, 44 and the outer channel walls 22i, 42i can be accomplished by a plug-in system, adhesive bonding, welding, laser welding or similar methods (not shown).

[0100] Figures 4A-C illustrate the double-walled channel walls 22 and 42, wherein the inner channel walls 22 and 42 are connected to the outer channel walls 22i and 42i, thereby constructing at least one sound damping device 10. As shown in Figure 4B, the inner channel walls 22 and 42 may include at least one channel 11 for at least one sound damping device 10. Preferably, the channel walls 22 and 42 include multiple channels 11 for multiple sound damping devices 10.

[0101] The inner channel walls 22, 42 are constructed and configured to substantially surround the cavities 23, 43 of the channels 7, 21, 41. The inner channel walls 22, 42 may have at least one channel 11 providing a breathable gas guiding connection between the cavities 23, 43 of the channels 7, 21, 41 and at least one chamber 12 of the sound damping device 10. Sound waves can be guided from the cavities 23, 43 into the chamber 12 of the sound damping device 10 through the channel 11. The sound damping device 10 may also have multiple chambers 12, particularly two, three, four, or more. In a specific embodiment according to Figures 4A-C, the sound damping device 10 has two chambers 12. These two chambers 12 may be constructed in a mirror-symmetric manner. In some embodiments, it is conceivable that the two chambers 12 of the sound damping device 10 have different geometries (not shown). The channel 11 establishes a pneumatic connection between the cavities 23, 43 and the two chambers 12.

[0102] The outer channel walls 22i, 42i can be formed and constructed to provide at least one chamber 12 of the sound damping device 10 in conjunction with the inner channel walls 22, 42. The outer channel walls 22i, 42i can be configured with at least one baffle element 14, 15, 16... The outer channel walls 22i, 42i can be configured with at least a first baffle element 14. Furthermore, the outer channel walls 22i, 42i can be configured with at least a second baffle element 15 and / or a third baffle element 16. As in the embodiment according to Figures 4A-C, the chamber 12 can have a trapezoidal basic shape with four baffle elements 14, 15, 16, 17. Depending on the number of baffle elements, triangular, polygonal, circular, or elliptical chambers 12 are also conceivable (not shown).

[0103] As shown in Figure 4B, the chamber 12 has a basic trapezoidal shape and is bounded by the regions of the first baffle element 14, the second baffle element 15, the third baffle element 16, and the inner channel walls 22 and 42. The regions of the inner channel walls 22 and 42 that bound the chamber 12 can, by definition, constitute another fourth baffle element 17.

[0104] As shown in Figure 4B, the arrangement of the first baffle element 14 and the second baffle element 15 can be similar to each other and analogous to the arrangement relative to the channel wall 22 previously described with respect to Figures 2 and 3. In this embodiment, the first baffle element 14 (plane E2) is also oriented at a first angle α1 relative to the channel wall 22 (plane E1). The second baffle element 15 (plane E3) is oriented at a second angle α2 relative to the channel wall 22 (plane E1). Here, the second baffle element 15 (plane E3) is oriented at an angle β relative to the first baffle element 14 (plane E2). The first baffle element 14 and the second baffle element 15 are not parallel. The first baffle element 14 and the second baffle element 15 are oriented to converge on each other (see Figure 4B).

[0105] As can also be seen from Figure 4B, the second baffle element 15 (plane E3) is oriented at a second angle α2 relative to the channel walls 22, 42 (plane E1). In the specific embodiment according to Figure 4, the second angle α2 can be particularly in the range of 40° to 160°, preferably in the range of 80° to 140°. In the specific embodiment according to Figure 4, the second angle α2 can be 90°.

[0106] The first baffle element 14 and the second baffle element 15 are not parallel and aligned. The first baffle element 14 and the second baffle element 15 are oriented to converge on each other (see FIG. 4B). The second baffle element 15 (plane E3) is oriented relative to the first baffle element 14 (plane E2) at an angle β greater than 0°. The angle β can be in the range of 0.1° to 90°. Preferably, the angle β can be in the range of 0.1° to 45°, more preferably in the range of 10° to 45° (inclusive). In the specific embodiment according to FIG. 4, the angle β can be 37°.

[0107] The sound damping device 10 can be arranged inside the intake side 8 and / or the pressure side 9 and / or the fan 3. The sound damping device 10 can be arranged in the channel wall 22 of the intake passage 21 on the intake side 8. Alternatively or additionally, the sound damping device 10 can be arranged in the channel wall 42 of the discharge passage 41 on the pressure side 9. Arranging it inside the fan 3, especially in the fan wall (not shown), is also conceivable. In particular, the sound damping device 10 of this embodiment can also be arranged in the chamber of the suspended fan (not shown).

[0108] The sound damping device 10 in the double-walled housing can be integrated into virtually any housing shape. In some embodiments, all walls (sides, bottom, and top) can be implemented simultaneously as double walls with the sound damping device 10.

[0109] In some embodiments, the sound damping devices 10 according to this embodiment can be distributed throughout the channel 7 that guides the breathing gas. In a preferred embodiment, such sound damping devices 10 may also be present only in specific areas of the channel wall 13. In particular, the sound damping devices 10 may be arranged inside the channel wall 13 where the channel 7 has curvature, bends, angles, or deflection points. In these cases, the main flow of breathing gas can be redirected, but sound waves will still impact the channel walls 13, 22, 42 (see Figure 4C Subsequently, the sound waves S can enter the channel 11 of the sound damping device 10 and be guided into at least one chamber 12, where they are damped. Preferably, the sound damping device 10 of this embodiment is arranged on the intake side 8.

[0110] Figure 5 shows an exemplary diagram of the equipment inlet 20 with a sound damping device, wherein, Figure 5A and 5B The cross-section is shown. Figure 5C A perspective view is shown. The suction channel 21 is arranged adjacent to the equipment inlet 20.

[0111] In the inhalation channel 21, the sound direction R2 is generally substantially opposite to the flow direction R1 of the breathing gas. To prevent sound waves S from reaching the device inlet 20 and entering the environment from there, at least one sound damping device 10 may be arranged adjacent to the device inlet 20 in the inhalation channel 21. The sound damping device 10 is set up and constructed to allow the breathing gas to pass through the fan 3, wherein the sound wave path to the fan outlet 20 and the environment is blocked. Alternatively or additionally, at least one element 24, 25, 26... may be arranged adjacent to and / or in or on the device inlet 20 in the inhalation channel 21.

[0112] At least one filter 6 may be arranged in or on the device inlet 20, which filters the fed breathing gas A, especially the fed ambient air. It is advantageous that the device inlet 20 and the corresponding filter size are as large as possible so that the filter 6 is as durable as possible, does not clog as quickly, and does not need to be replaced as frequently. A pleated filter or a filter system having multiple filters arranged in succession may also be advantageous (not shown).

[0113] exist Figure 5B The diameters of the device inlet 20 and the suction channel 21 are visualized. The device inlet 20 has a diameter 20-D. The filter 6 has a size of at least 20-D, preferably larger than the diameter 20-D of the device inlet 20 (not shown). The suction channel 21 has a diameter 21-D. The diameter of the suction channel 21-D can be constant or variable. In a preferred embodiment, the suction channel 21 can have variable diameters 21-D1, 21-D2... (see...). Figure 3A , 5B For this purpose, elements 24, 25, 26... can be arranged in or on the device inlet 20, and these elements can be set and configured to affect the diameter of the suction channel 21-D.

[0114] The diameter 20-D of the device inlet is at least equal to the diameter 21-D of the suction channel. In a preferred embodiment, the diameter 20-D of the device inlet is larger than the diameter 21-D of the suction channel. In some configurations, the diameter 20-D of the device inlet may be at least 1.1 times, preferably at least 1.5 times, and particularly preferably at least 2 times, the diameter of the suction channel. In some embodiments, the diameter 20-D of the device inlet may be at least 3 times, preferably at least 4 times, and particularly preferably at least 6 times, the diameter of the suction channel.

[0115] In some implementations, such as Figure 5AAs exemplarily shown in -C, at least one, preferably multiple, elements 24, 25, 26 may be arranged in or on the device inlet 20. Elements 24, 25, 26 may be configured to influence the flow of breathing gases. In particular, elements 24, 25, 26 may be configured to deflect the flow of breathing gases.

[0116] Elements 24, 25, and 26 can also be configured to influence sound waves. In particular, elements 24, 25, and 26 can be configured to deflect and / or limit and / or block the path of sound waves. In particular, elements 24, 25, and 26 can also be configured to change the diameter 21-D of the intake channel. The diameter 21-D of the intake channel is determined according to… Figure 5A The -C implementation can be configured to be variable. From Figure 5B As can be seen, the suction channel 21 may have at least one first diameter 21-D1 and one second diameter 21-D2. The diameter 20-D of the device inlet is generally larger than the first diameter 21-D1 of the suction channel. The first diameter 21-D1 of the suction channel may be less than or equal to the second diameter 21-D2 of the suction channel. Preferably, the first diameter 21-D1 of the suction channel is smaller than the second diameter 21-D2 of the suction channel.

[0117] from Figure 5A As can be seen, channel 7, especially inhalation channel 21, does not necessarily extend in a straight line. Preferably, inhalation channel 21 has at least one, preferably multiple, deflection points. Through multiple deflections, the breathing gas is guided through the housing along a longer path. In the embodiment according to FIG. 5, the first deflection of the breathing gas is constructed directly at the device inlet 20. The breathing gas can be inhaled from the environment and is initially deflected, for example, by 90° as it enters inhalation channel 21. Conversely, sound waves are not initially deflected but instead enter channel 11 of the sound damping device 10 (see...). Figure 5A Channel 11 is configured and positioned to guide sound waves S to the first baffle element 14 and / or into the chamber 12. Elements 24, 25, 26... may also be configured to construct and / or extend channel 11 leading to the sound damping device 10. In particular, the first element 24 is configured and positioned to construct and / or extend channel 11. The first element 24 may also be configured and oriented to further obstruct and / or block the path of sound waves to the device inlet 20.

[0118] from Figure 5A As can be seen, the chamber 12 of the sound damping device 10 can have a substantially circular base shape. Elliptical, spiral, snail-shaped, polygonal, or other configurations are also possible base shapes. The chamber 12 is not closed. The chamber 12 is pneumatically connected to the intake passage 21 via the channel 11.

[0119] In an embodiment with a circular chamber 12, the first baffle element 14, the second baffle element 15, the third baffle element 16... can be integrally implemented and constructed as a single curved baffle element 18. Through the circular design of the chamber 12, this single curved baffle element 18 can thereby combine the functions of the first, second, third, fourth... baffle elements 14, 15, 16, 17... into itself (see...). Figure 5A ).

[0120] The curved baffle element 18 can be bent such that the sound wave S entering the chamber 12 from the channel 11 is reflected multiple times at the curved baffle element 18. Through the reflection of the sound wave, the sound is reduced and / or absorbed and / or damped and / or sound-insulated and / or superimposed.

[0121] The curved baffle element 18 can be curved such that sound waves are reflected multiple times. Here, sound waves from channel 11 initially strike the curved baffle element 18. The curved baffle element 18 is set and constructed to reflect sound waves. The curved baffle element 18 is oriented such that sound waves S are reflected multiple times at the curved baffle element 18. Therefore, sound waves S can be substantially retained inside the chamber 12. The curved baffle element 18 is configured such that sound waves are reflected at least twice, preferably at least four times, particularly preferably at least six times, especially ten times or more. Preferably, sound waves are reflected an unlimited number of times without re-entering channel 11. This is preferably achieved in such a way that the curved baffle element 18 is not constructed as a uniform circle, and the chamber 12 is therefore not constructed as a perfect circle. The radius of curvature of the curved baffle element 18 is therefore preferably not constant.

[0122] Although the invention has been described in detail with reference to embodiments, it will be natural to those skilled in the art that the invention is not limited to these embodiments. Rather, modifications may be made by omitting individual features or implementing other combinations of the described individual features without departing from the scope of the appended claims. This disclosure includes all combinations of the described individual features.

[0123] List of reference numerals A. Breathing gas D diameter E1, E2, E3... Planes L length R1 Respiratory gas flow direction R2 Sound Direction S sound wave 1. Artificial respiration equipment 2. Shell 3. Breathing gas source / fan 4. Control device 5. Connection Unit 6 Filters 7 channels 8. Inhalation side 9. Pressure side 10 Sound damping device 11 channels 12 chambers 13. Channel Wall 14 First baffle element 15 Second baffle element 16 Third baffle element 17. Fourth baffle element 18. Curved baffle element 19 Opening 20 Equipment entrance 20-D Diameter of the equipment inlet 21. Inhalation Channel 21-D Diameter of the inhalation channel 22 (Internal) passage wall 22i outer channel wall 23. Inner cavity 24 First Component 25 Second Element 26 Third Component 40 Equipment Exports 41 Discharge Channel 42 (Internal) passage wall 42i outer channel wall 43. Inner cavity 44 slats 45 First Section 46 Second Section 47 Third Section α, β, γ angles

Claims

1. An artificial respiration device (1) having at least one sound damping device (10), wherein, The artificial respiration device (1) includes a housing (2) having at least one device inlet (20) and at least one device outlet (40) and at least one channel (7) for guiding respiratory gas (A), wherein the channel (7) is constructed between the device inlet (20) and the device outlet (40), wherein at least one respiratory gas source (3) for generating a respiratory airflow (R1) is arranged in or on the channel (7), such that the channel (7) includes at least one inspiratory side (8) having an inhalation channel (21) and at least one pressure side (9) having an exhaust channel (41), wherein the respiratory airflow (R1) in the inhalation channel (21) is guided from the device inlet (20) to the respiratory gas source (3), and sound waves (S) are directed along the sound direction (R2) from the respiratory gas source (3). The gas source (3) propagates in the direction toward the device inlet (20) and thus in the opposite direction to the flow direction (R1), wherein the breathing gas flow (R1) in the exhaust channel (41) flows from the breathing gas source (3) to the device outlet (40), and the sound wave (S) propagates in the direction of sound (R2) from the breathing gas source (3) in the direction toward the device outlet (40) and thus in the same direction as the flow direction (R1), characterized in that the sound damping device (10) is arranged in or on the inhalation channel (21) on the inhalation side (8) and / or in or on the exhaust channel (41) on the pressure side (9), wherein the sound damping device (10) is provided and constructed to dampen the sound wave (S) that propagates in the same direction and / or in the opposite direction to the flow direction (R1) of the breathing gas.

2. The artificial respiration device (1) according to any one of the preceding claims, characterized in that, The inhalation channel (21) and / or the exhaust channel (41) include at least one, preferably at least two, particularly preferably multiple sound damping devices (10).

3. The artificial respiration device (1) according to any one of the preceding claims, characterized in that, The sound damping device (10) includes at least one chamber (12) having at least one opening (19), the chamber (12) being pneumatically coupled to the channel (7) through the opening, such that at least a portion of the breathing gas (A) guided through the channel (7) flows into the chamber (12); wherein the chamber (12) includes at least one baffle element (14, 15, 16, 17, 18), the baffle element being set and configured to reflect sound waves (S) entering the chamber (12) multiple times.

4. The artificial respiration device (1) according to any one of the preceding claims, characterized in that, The baffle elements (14, 15, 16, 17, 18) are constructed or arranged such that the sound waves (S) entering the chamber (12) are reflected at least twice, preferably at least four times, particularly preferably at least six times, and especially ten times or more.

5. The artificial respiration device (1) according to any one of the preceding claims, characterized in that, The chamber (12) includes at least one curved baffle element (18), and / or the chamber (12) includes at least one first baffle element (14) and a second baffle element (15), the first baffle element and the second baffle element being oriented relative to each other at an angle β.

6. The artificial respiration device (1) according to any one of the preceding claims, characterized in that, The chamber (12) has a basic geometric shape selected from the group consisting of: circle, ellipse, angular, trapezoid, triangle, quadrilateral, polygon.

7. The artificial respiration device (1) according to any one of the preceding claims, characterized in that, The curved baffle element (18) surrounds the chamber (12) such that the chamber (12) is configured to be substantially circular or elliptical and has the opening (19) for pneumatic connection with the channel (7).

8. The artificial respiration device (1) according to any one of the preceding claims, characterized in that, The radius of curvature of the curved baffle element (18) is not constant.

9. The artificial respiration device (1) according to any one of the preceding claims, characterized in that, The angle β is greater than 0°, wherein the angle β is preferably in the range from 0.1° to 90°, more preferably in the range from 5° to 70°, and especially in the range from 15° to 45°.

10. The artificial respiration device (1) according to any one of the preceding claims, characterized in that, The inhalation channel (21) has a channel wall (22) surrounding the inner cavity (23) of the inhalation channel, and the discharge channel (41) has a channel wall (42) surrounding the inner cavity (43) of the discharge channel.

11. The artificial respiration device (1) according to any one of the preceding claims, characterized in that, The first baffle element (14) is oriented relative to the channel wall (22, 42) at a first angle α1, wherein the first angle α1 is greater than 0° and less than 180°, wherein the first angle α1 is preferably in the range of 90° to 180°, particularly preferably in the range of 90° to 160°, more preferably in the range of 100° to 140°, and especially in the range of 110° to 130°.

12. The artificial respiration device (1) according to any one of the preceding claims, characterized in that, The second baffle element (15) is oriented relative to the channel wall (22, 42) at a second angle α2, wherein the second angle α2 is greater than 0° and less than 180°, wherein the second angle α2 is preferably in the range of 20° to 180°, more preferably in the range of 60° to 160°, and especially in the range of 80° to 140°.

13. The artificial respiration device (1) according to any one of the preceding claims, characterized in that, The first angle α1 and the second angle α2 are preferably different in size, wherein the deviation between the first angle α1 and the second angle α2 is greater than 0.1°, particularly preferably greater than 5°, and more preferably greater than 10°.

14. The artificial respiration device (1) according to any one of the preceding claims, characterized in that, The sound wave (S) is deflected by reflection on the baffle elements (14, 15, 16, 17, 18) such that the sound direction (R2) forms an angle γ with the flow direction (R1) of the breathing gas, wherein the angle γ is in the range of 50° to 130°, preferably in the range of 70° to 110°, and more preferably in the range of 80° to 100°.

15. The artificial respiration device (1) according to any one of the preceding claims, characterized in that, The baffle elements (14, 15, 16, 17, 18) are preferably arranged relative to each other such that the sound direction (R2) forms an angle γ of approximately 90° with the flow direction (R1) of the breathing gas.

16. The artificial respiration device (1) according to any one of the preceding claims, characterized in that, The channel wall (22) of the inhalation channel (21) and / or the channel wall (42) of the discharge channel (41) are configured with an inner channel wall (22, 42) and an outer channel wall (22i, 42i).

17. The artificial respiration device (1) according to any one of the preceding claims, characterized in that, The inner channel walls (22, 42) and the outer channel walls (22i, 42i) can be reversibly or irreversibly connected to each other, preferably reversibly.

18. The artificial respiration device (1) according to any one of the preceding claims, characterized in that, The sound damping device (10) includes a channel (11), wherein the channel (11) is constructed in the inner channel wall (22, 42) and is configured to provide a pneumatic connection between the channel (7) of the artificial respiration device and the chamber (12).

19. The artificial respiration device (1) according to any one of the preceding claims, characterized in that, The outer channel wall (22i, 42i) is configured to construct at least one chamber (12) of the sound damping device (10) in conjunction with the inner channel wall (22, 42), wherein the outer channel wall (22i, 42i) includes at least one baffle element (14, 15, 16, 17, 18).

20. The artificial respiration device (1) according to any one of the preceding claims, characterized in that, The chamber (12) is closed at least on both sides by the first baffle element (14) and the second baffle element (15), wherein the baffle elements (14, 15) are arranged opposite to each other, and wherein the chamber (12) has two openings (19i, 19ii).

21. The artificial respiration device (1) according to any one of the preceding claims, characterized in that, The openings (19i, 19ii) are configured such that the breathing gas flows into the chamber (12) through the first opening (19i) along the flow direction (R1) and flows out of the chamber (12) through the second opening (19ii), wherein the baffle elements (14, 15) are oriented relative to each other such that the sound waves are separated from the mainstream of the breathing gas by reflection on the first baffle element (14) and retained in the chamber (12).

22. The artificial respiration device (1) according to any one of the preceding claims, characterized in that, At least one slat (44) is arranged in the inner cavity (43) of the discharge channel (41), preferably at least two, three, four, five, six or more slats (44).

23. The artificial respiration device (1) according to any one of the preceding claims, characterized in that, The slats (44) divide the discharge channel (21) longitudinally in at least a segmental manner, such that the discharge channel (21) is divided into sub-channels (11) in at least a segmental manner, wherein a sub-channel (11) is constructed between corresponding two slats (44) and / or between the channel wall (42) and the slats (44).

24. The artificial respiration device (1) according to any one of the preceding claims, characterized in that, The slats (44) are configured such that at least one chamber (12) surrounded on both sides is constructed in the sub-channel (11), the chamber having the first baffle element (14) and the second baffle element (15) and the two openings (19i, 19ii).

25. The artificial respiration device (1) according to any one of the preceding claims, characterized in that, The chamber (12) includes at least one third baffle element (16), wherein the chamber (12) is closed on three sides by at least the first baffle element (14), the second baffle element (15) and the third baffle element (16), such that the chamber (12) has only one opening (19).

26. The artificial respiration device (1) according to any one of the preceding claims, characterized in that, The first baffle element (14) is arranged at least partially in the cavity (23) of the inhalation channel (21) and configured to deflect sound waves (S) at least from the inhalation channel (21) into the chamber (12).

27. The artificial respiration device (1) according to any one of the preceding claims, characterized in that, At least one element (24, 25, 26...) is arranged in the inhalation channel (21) adjacent to and / or in or on the device inlet (20), the at least one element being configured to deflect and / or limit and / or block the sound direction (R2), wherein the element (24, 25, 26...) is particularly configured and constructed to guide the sound waves into the sound damping device (10).

28. A sound damping device (10) for a respiratory device (1), the respiratory device having at least one channel (7) for guiding respiratory gas (A), wherein, The sound damping device (10) includes at least one chamber (12) having at least one opening (19), the chamber (12) being pneumatically coupled to the channel (7) through the opening, such that at least a portion of the breathing gas (A) guided through the channel (7) flows into the chamber (12); wherein the chamber (12) includes at least one baffle element (14, 15, 16, 17, 18). The baffle elements (14, 15, 16, 17, 18) are configured to reflect sound waves (S) entering the chamber (12) multiple times.

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