초록 ▼

A tub is configured to contain a supply of water and is configured to be inserted into a chamber of a humidifier. The tub includes a tub base configured to contain the supply of water. The tub also includes a tub lid and a flow plate provided between the tub base and the tub lid. The flow plate incl

A tub is configured to contain a supply of water and is configured to be inserted into a chamber of a humidifier. The tub includes a tub base configured to contain the supply of water. The tub also includes a tub lid and a flow plate provided between the tub base and the tub lid. The flow plate includes a water level indicator configured to indicate a level of the supply of water in the tub base. In addition, the water level indicator includes a generally rectangular portion and a generally triangular portion.

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1. A respiratory apparatus for providing a humidified flow of pressurised breathable gas to a patient, comprising: a flow generator to generate a flow of pressurised breathable gas to be delivered to a patient;a pressurisable humidifier chamber including a chamber inlet configured to receive the flo

1. A respiratory apparatus for providing a humidified flow of pressurised breathable gas to a patient, comprising: a flow generator to generate a flow of pressurised breathable gas to be delivered to a patient;a pressurisable humidifier chamber including a chamber inlet configured to receive the flow of pressurised breathable gas from the flow generator, the chamber having a rear wall comprising a chamber outlet, the chamber having a bottom support surface including a heating plate having a substantially upward-facing heating surface;a humidifier lid being hingedly attached to a wall of the chamber and pivotably movable between an open position and a closed position, an inside surface of the humidifier lid having a depending rib;a water tub configured to contain a supply of water, the tub having a tub base with a bottom adapted to contact the heating surface, a tub lid, and a tub seal sealing between the tub base and the tub lid and located above the supply of water, the tub lid having a tub inlet and a tub outlet, the tub outlet being provided on a rear wall of the tub and configured to deliver the flow of pressurised breathable gas with added humidity to the chamber outlet, the tub being constructed and dimensioned to be wholly positionable within the chamber;a chamber seal configured to seal the chamber such that the flow of pressurised breathable gas pressurises the chamber when the tub is wholly within the chamber and the humidifier lid is in the closed position, the chamber seal having a groove configured to receive the depending rib of the humidifier lid, the chamber seal having a sealing rim that extends around a perimeter of the chamber seal, the sealing rim having a perimeter that is larger than a perimeter of the tub lid so as to be positioned above and seal downwardly against a substantially upward-facing surface of the chamber when the humidifier lid is in the closed position; anda clip to force the tub seal into sealing engagement and to secure the tub lid and the tub base to one another. 2. The respiratory apparatus according to claim 1, further comprising an outlet seal to seal between the chamber outlet and the tub outlet. 3. The respiratory apparatus according to claim 2, wherein the outlet seal includes a lip that projects into the chamber, the lip being mounted on a flange that is seated in a recess provided in an inner surface of the rear wall. 4. The respiratory apparatus according to claim 1, further comprising mutually engaging surfaces of the chamber and the tub configured to urge the tub in a rearward horizontal direction towards the chamber outlet to facilitate sealing between the tub outlet and the chamber outlet. 5. The respiratory apparatus according to claim 1, wherein the sealing rim has a profile as seen in cross section that curves downward and inwardly towards the chamber, such that the sealing rim is structured to be exposed to the flow of pressurised breathable gas provided to the chamber. 6. The respiratory apparatus according to claim 1, wherein the tub inlet is spaced away from the chamber inlet by a distance when the tub is received in the chamber. 7. The respiratory apparatus according to claim 1, wherein the depending rib is spaced inwardly from an outermost border of the humidifier lid, at least a portion of the chamber seal being positioned substantially between the depending rib and the outermost border when the humidifier lid is in the closed position. 8. The respiratory apparatus according to claim 1, further comprising laterally spaced recesses formed in the tub lid to accommodate the fingers of a user for handling the tub. 9. The respiratory apparatus according to claim 1, wherein the chamber seal is selectively engageable with the tub lid. 10. The respiratory apparatus according to claim 1, wherein, when the humidifier lid is in the closed position with the tub in the chamber, the humidifier lid pushes the tub against the heating plate. 11. The respiratory apparatus according to claim 1, wherein the chamber seal comprises at least one first protrusion configured to engage the tub, wherein the at least one first protrusion is wedge-shaped. 12. The respiratory apparatus according to claim 11, wherein the chamber seal comprises at least one second protrusion configured to push against the tub lid when the humidifier lid is in the closed position. 13. The respiratory apparatus according to claim 1, wherein the tub has a substantially polygonal shape having four corners, three of which corners are similarly rounded corners and the fourth corner has a different shape compared to the three similarly rounded corners. 14. The respiratory apparatus according to claim 1, further comprising a user-operated lid closure member to maintain the humidifier lid in the closed position, the user-operated lid closure member comprising: at least one latch to selectively engage with a catch;a spring to bias the latch into engagement with the catch;a post to support the spring; andan opening member configured to be pushed against the bias of the spring to release the latch from the catch, thus allowing the humidifier lid to be pivoted to the open position. 15. The respiratory apparatus according to claim 1, further comprising a water level indicator to indicate a maximum fill level for the water tub, the water level indicator being suspended within the tub for direct exposure to water within the tub, the water level indicator having an angled wall having a first portion extending into the tub to a first depth and a second portion extending into the tub to a second depth that is different than the first depth, wherein as the water level of the tub base increases when filling the tub, the water level will initially contact the first portion of the angled wall of the water level indicator, and as the water level continues to increase, the water will then rise upwardly towards the second portion of the angled wall to contact indicia indicating the maximum fill level, the indicia on the angled wall being positioned so as to be visible when the water tub is viewed from above. 16. The respiratory apparatus according to claim 1, wherein the rear wall comprises an outlet tube, and the respiratory apparatus further comprises a gas delivery tube with a first end connectable to the outlet tube to receive the flow of breathable gas, and a second end including a cuff configured for connection to a patient interface. 17. The respiratory apparatus according to claim 1, wherein the tub lid has a water aperture, and the chamber seal further comprises an aperture seal projecting from an underside of the chamber seal to seal the water aperture. 18. The respiratory apparatus according to claim 1, wherein the tub is removable from the humidifier chamber and is configured to prevent water from flowing back into the flow generator. 19. The respiratory apparatus according to claim 1, wherein the clip is located along a lateral side of the tub. 20. The respiratory apparatus according to claim 19, wherein the clip is mounted for pivotable movement between an open position and a closed position, the clip being pivotable about an axis located at a proximal end of the clip, the clip having a slot configured to receive a projection of the tub when the clip is pivoted from the open position to the closed position, the slot and the projection extending parallel to the axis, and the slot being positioned closer to the proximal end of the clip as compared to a distal end of the clip. 21. The respiratory apparatus according to claim 1, wherein: the respiratory apparatus further comprises an outlet seal to seal between the chamber outlet and the tub outlet,the outlet seal includes a lip that projects into the chamber, the lip being mounted on a flange that is seated in a recess provided in an inner surface of the rear wall,the sealing rim has a profile as seen in cross section that curves downward and inwardly towards the chamber, such that the sealing rim is structured to be exposed to the flow of pressurised breathable gas provided to the humidifier chamber,the tub inlet is spaced away from the chamber inlet by a distance when the tub is received in the chamber,the depending rib is spaced inwardly from an outermost border of the humidifier lid, at least a portion of the chamber seal being positioned substantially between the depending rib and the outermost border when the humidifier lid is in the closed position,the respiratory apparatus further comprises laterally spaced recesses formed in the tub lid to accommodate the fingers of a user for handling the tub,the chamber seal is selectively engageable with the tub lid,when the humidifier lid is in the closed position with the tub in the chamber, the humidifier lid pushes the tub against the heating plate, wherein: the chamber seal comprises at least one first protrusion configured to engage the tub, wherein the at least one first protrusion is wedge-shaped, the chamber seal comprises at least one second protrusion configured to push against the tub lid when the humidifier lid is in the closed position,the tub has a substantially polygonal shape having four corners, three of which corners are similarly rounded corners and the fourth corner has a different shape compared to the three similarly rounded corners,further comprising a user-operated lid closure member to maintain the humidifier lid in the closed position, the user-operated lid closure member comprising: at least one latch to selectively engage with a catch;a spring to bias the latch into engagement with the catch; anda post to support the spring;wherein the catch and the latch are configured to be released from one another by pushing against the bias of the spring, thus allowing the humidifier lid to be pivoted to the open position,the respiratory apparatus further comprises a water level indicator to indicate a maximum fill level for the water tub, the water level indicator being suspended within the tub for direct exposure to water within the tub, the water level indicator having an angled wall having a first portion extending into the tub to a first depth and a second portion extending into the tub to a second depth that is different than the first depth, wherein as the water level of the tub base increases when filling the tub, the water level will initially contact the first portion of the angled wall of the water level indicator, and as the water level continues to increase, the water will then rise upwardly towards the second portion of the angled wall to contact indicia indicating the maximum fill level, the indicia on the angled wall being positioned so as to be visible when the water tub is viewed from above,the rear wall comprises an outlet tube, and the respiratory apparatus further comprises a gas delivery tube with a first end connectable to the outlet tube to receive the flow of breathable gas, and a second end including a cuff configured for connection to a patient interface,the tub lid has a water aperture, and the chamber seal further comprises an aperture seal projecting from an underside of the chamber seal to seal the water aperture,the tub is removable from the humidifier chamber and is configured to prevent water flowing out of the tub from flowing back into the flow generator,the clip is located along a lateral side of the tub, andthe clip is mounted for pivotable movement between an open position and a closed position, the clip being pivotable about an axis located at a proximal end of the clip, the clip having a slot configured to receive a projection of the tub when the clip is pivoted from the open position to the closed position, the slot and the projection extending parallel to the axis, and the slot being positioned closer to the proximal end of the clip as compared to a distal end of the clip. 22. The respiratory apparatus according to claim 1, wherein: the respiratory apparatus further comprises an outlet seal to seal between the chamber outlet and the tub outlet,the outlet seal includes a lip that projects into the chamber, the lip being mounted on a flange that is seated in a recess provided in an inner surface of the rear wall,the depending rib is spaced inwardly from an outermost border of the humidifier lid, at least a portion of the chamber seal being positioned substantially between the depending rib and the outermost border when the humidifier lid is in the closed position,the respiratory apparatus further comprises laterally spaced recesses formed in the tub lid to accommodate the fingers of a user for handling the tub,when the humidifier lid is in the closed position with the tub in the chamber, the humidifier lid pushes the tub against the heating plate, wherein: the chamber seal comprises at least one first protrusion configured to engage the tub, wherein the at least one first protrusion is wedge-shaped, and the chamber seal comprises at least one second protrusion configured to push against the tub lid when the humidifier lid is in the closed position,the tub has a substantially polygonal shape having four corners, three of which corners are similarly rounded corners and the fourth corner has a different shape compared to the three similarly rounded corners,the respiratory apparatus further comprises a latch and catch to maintain the humidifier lid in the closed position,the respiratory apparatus further comprises a water level indicator to indicate a maximum fill level for the water tub, the water level indicator being suspended within the tub for direct exposure to water within the tub, the water level indicator having an angled wall having a first portion extending into the tub to a first depth and a second portion extending into the tub to a second depth that is different than the first depth, wherein as the water level of the tub base increases when filling the tub, the water level will initially contact the first portion of the angled wall of the water level indicator, and as the water level continues to increase, the water will then rise upwardly towards the second portion of the angled wall to contact indicia indicating the maximum fill level, the indicia on the angled wall being positioned so as to be visible when the water tub is viewed from above,the rear wall comprises an outlet tube, and the respiratory apparatus further comprises a gas delivery tube with a first end connectable to the outlet tube to receive the flow of breathable gas, and a second end including a cuff configured for connection to a patient interface, andthe clip is mounted for pivotable movement between an open position and a closed position, the clip being pivotable about an axis located at a proximal end of the clip, the clip having a slot configured to receive a projection of the tub when the clip is pivoted from the open position to the closed position, the slot and the projection extending parallel to the axis, and the slot being positioned closer to the proximal end of the clip as compared to a distal end of the clip. 23. The respiratory apparatus according to claim 1, wherein: the respiratory apparatus further comprises an outlet seal to seal between the chamber outlet and the tub outlet,the outlet seal includes a lip that projects into the chamber, the lip being mounted on a flange that is seated in a recess provided in an inner surface of the rear wall,the depending rib is spaced inwardly from an outermost border of the humidifier lid, at least a portion of the chamber seal being positioned substantially between the depending rib and the outermost border when the humidifier lid is in the closed position,the respiratory apparatus further comprises laterally spaced recesses formed in the tub lid to accommodate the fingers of a user for handling the tub,when the humidifier lid is in the closed position with the tub in the chamber, the humidifier lid pushes the tub against the heating plate,the respiratory apparatus further comprises a user-operated lid closure member to maintain the humidifier lid in the closed position, the user-operated lid closure member comprising at least one latch to selectively engage with a catch;a spring to bias the latch into engagement with the catch; andan opening member configured to be pushed against the bias of the spring to release the latch from the catch, thus allowing the humidifier lid to be pivoted to the open position,the respiratory apparatus further comprises a water level indicator to indicate a maximum fill level for the water tub, the water level indicator being suspended within the tub for direct exposure to water within the tub, the water level indicator having an angled wall having a first portion extending into the tub to a first depth and a second portion extending into the tub to a second depth that is different than the first depth, wherein as the water level of the tub base increases when filling the tub, the water level will initially contact the first portion of the angled wall of the water level indicator, and as the water level continues to increase, the water will then rise upwardly towards the second portion of the angled wall to contact indicia indicating the maximum fill level, the indicia on the angled wall being positioned so as to be visible when the water tub is viewed from above,the tub lid has a water aperture, and the chamber seal further comprises an aperture seal projecting from an underside of the chamber seal to seal the water aperture, andthe clip is mounted for pivotable movement between an open position and a closed position, the clip being pivotable about an axis located at a proximal end of the clip, the clip having a slot configured to receive a projection of the tub when the clip is pivoted from the open position to the closed position, the slot and the projection extending parallel to the axis. 24. A respiratory apparatus for providing a humidified flow of pressurised breathable gas to a patient, comprising: a flow generator to generate a flow of pressurised breathable gas to be delivered to a patient;a pressurisable humidifier chamber including a chamber inlet configured to receive the flow of pressurised breathable gas from the flow generator, the chamber having a rear wall comprising a chamber outlet, the chamber having a bottom support surface including a heating plate having a substantially upward-facing heating surface;a humidifier lid being hingedly attached to a wall of the chamber and pivotably movable between an open position and a closed position;a water tub configured to contain a supply of water, the tub having a tub base with a bottom adapted to contact the heating surface, a tub lid, and a tub seal sealing between the tub base and the tub lid and located above the supply of water, the tub lid having a tub inlet and a tub outlet, the tub outlet being provided on a rear wall of the tub and configured to deliver the flow of pressurised breathable gas with added humidity to the chamber outlet, the tub being constructed and dimensioned to be wholly positionable within the chamber; anda seal including a central portion and an outer perimeter portion surrounding the central portion, wherein the outer perimeter portion has a chamber seal configured to seal the chamber such that the flow of breathable gas pressurises the chamber, wherein the central portion has 1) at least one first protrusion configured to engage the tub lid, wherein the at least one first protrusion is wedge-shaped, 2) at least one second protrusion configured to push against the tub lid when the humidifier lid is in the closed position, and 3) an aperture seal projecting from an underside of the seal to seal a water aperture of the tub lid. 25. The respiratory apparatus according to claim 24, further comprising a water level indicator to indicate a fill level for the water tub, the water level indicator being suspended within the tub for direct exposure to water within the tub, the water level indicator having an angled surface, wherein as the water level of the tub base increases when filling the tub, the water level will initially contact a bottom of the angled surface of the water level indicator, and as the water level continues to increase, the water will then contact indicia towards a top of the angled surface indicating the fill level. 26. The respiratory apparatus according to claim 24, further comprising a clip to secure the tub lid and the tub base to one another, the clip being located along a lateral side of the tub, the clip being mounted on the tub for pivotable movement about an axis located at a proximal end of the clip, the clip having a slot configured to receive a projection of the tub when the clip is pivoted to a secured position, the slot extending parallel to the axis and being positioned closer to the proximal end of the clip as compared to a distal end of the clip. 27. The respiratory apparatus according to claim 24, wherein: the seal has a groove configured to receive an edge of the humidifier lid,the chamber seal includes a sealing rim that extends about a perimeter of the seal, the sealing rim having a profile as seen in cross section that projects downwards from the humidifier lid and curves inwardly towards the chamber, the sealing rim extending beyond the edge of the tub lid along the entire perimeter of the tub lid, the sealing rim being adapted to engage an upwardly facing rim surrounding the chamber,the tub lid includes a water opening and the seal includes a sealing ring to seal the water opening, the sealing ring projecting downwards from an underside of the seal, andthe tub lid has laterally spaced recesses to accommodate the fingers of a user for handling the tub. 28. A respiratory apparatus for providing a humidified flow of pressurized breathable gas to a patient, comprising: a flow generator to generate a flow of pressurized breathable gas to be delivered to a patient;a chamber configured to receive the flow of pressurized breathable gas, the chamber having a chamber inlet to deliver the pressurized breathable gas from the flow generator to the chamber, the chamber having a chamber outlet to deliver the flow of breathable gas to an outlet tube, the chamber having a bottom support surface having a heating plate;a tube connector in fluid communication with the chamber outlet;a tub configured to contain a supply of water, the tub being configured to be inserted into the chamber, the tub having a tub base, a tub lid and a tub seal between the tub lid and the tub base, the tub base having with a bottom adapted to contact the heating plate, the tub lid having a tub inlet and a tub outlet, the tub outlet being configured to deliver the humidified flow of breathable gas to the chamber outlet;a latch engagable with a catch to maintain the tub within the chamber;a user-operated opening member configured to be pushed to release the latch from the catch, thus allowing the tub to be removed from the chamber;a clipping structure to force the tub seal into sealing engagement and to secure the tub lid and the tub base to one another, the clipping structure being located along a lateral side of the tub, the clipping structure including a clip mounted for movement towards and away from the lateral side of the tub, the clip having a pair of laterally spaced slots each configured to receive a projection of the tub when the clip is moved to a closed position, wherein the clipping structure is configured to force a rim of the tub lid into sealing engagement with a rim of the tub base; anda water level indicator to indicate a maximum fill level for the water tub. 29. The respiratory apparatus according to claim 28, further comprising an outer rim, a circular inlet, and a plurality of bridges that connect the outer rim to the circular inlet, the tub seal being supported by the outer rim, the circular inlet being aligned with the tub inlet such that the flow of pressurized breathable gas is directed from the tub inlet to the circular inlet when the tub base, the tub lid and the tub seal are connected. 30. A respiratory apparatus for providing a humidified flow of pressurized breathable gas to a patient, comprising: a flow generator to generate a flow of pressurized breathable gas to be delivered to a patient;a pressurizable humidifier chamber including a chamber inlet configured to receive the flow of pressurized breathable gas from the flow generator, the chamber having a rear wall including an inner surface including a chamber outlet, the rear wall including an outlet tube protruding from an outer surface of the rear wall, the chamber having a bottom support surface including a heating plate;a humidifier lid pivotable between an open position and a closed position, the humidifier lid having an outside surface and an inside surface, the inside surface having a depending rib, the humidifier lid comprising a hinge portion that is hingedly attached to a hinge portion provided on the rear wall of the chamber;a water tub configured to contain water, the tub having a tub base with a bottom adapted to contact the heating plate, a tub lid, and a tub seal sealing between the tub base and the tub lid, the tub lid having a tub inlet and a tub outlet, the tub outlet being provided on a rear wall of the tub and configured to deliver the flow of pressurized breathable gas with added humidity to the chamber outlet, the tub lid having a water aperture;a chamber seal between the humidifier lid and the tub lid when the tub is in the chamber and the humidifier lid is in the closed position, the chamber seal being configured to seal the chamber such that the flow of breathable gas pressurizes the chamber with the tub as a whole positioned therein, the chamber seal having a groove configured to receive the depending rib of the humidifier lid, the chamber seal having a sealing rim that extends around the perimeter of the chamber seal, the sealing rim positioned above and sealing downwardly against a substantially horizontal surface of the chamber when the humidifier lid is in the closed position, the chamber seal further comprising a circular sealing ring projecting from an underside of the chamber to seal the water aperture; anda clipping structure to force the tub seal into sealing engagement and to secure the tub lid and the tub base to one another, the clipping structure being located along a lateral side of the tub, the clipping structure including a clip mounted for pivotable movement between an open position in which the tub lid may be lifted relative to the tub base and a closed position in which the tub lid is secured against relative movement relative to the tub base, the clip being pivotable about an axis located at a proximal end of the clip, the clip having a slot configured to receive a projection of the tub when the clip is pivoted from the open position to the closed position, the slot and the projection extending parallel to the axis, and the slot being positioned closer to the proximal end of the clip as compared to a distal end of the clip.