Humidification chamber and chamber seal for a respiratory assistance device

Abstract

A humidification chamber (24, 50, 300, 400, 500, 600, or 700) for humidifying a gas is provided, comprising a water tub configured to receive a volume of water, a gas inlet for receiving a flow of gas into an interior volume of the humidification chamber, and a gas outlet through which a humidified flow of gas can exit the interior volume of the humidification chamber. One or more fill apertures (120) are provided in fluid communication with the water tub such that the water tub can be filled with water through the one or more fill apertures. A sealing closure (850) is also provided, configured to be releasably mounted on the humidification chamber (24, 50, 300, 400, 500, 600, or 700), the sealing closure (850) being configured to sealingly close each fill aperture (120) when the sealing closure (850) is mounted on the humidification chamber to inhibit the escape of gas and / or vapour from the one or more fill apertures (120).

Description

[0001] This invention is a divisional application of the invention patent filed on April 27, 2017, with application number 201780026999.9 (international application number PCT / NZ2017 / 050047) and titled "Humidification Chamber and Chamber Seal for Respiratory Assist Device". Technical Field

[0002] This disclosure relates to a humidification chamber and chamber seal for a respiratory assist device that provides a user with a flow of humidified gas for therapeutic purposes. The respiratory assist device can provide respiratory assistance to patients or users who require a gas supply for respiratory therapy such as, but not limited to, humidification and / or flow therapy, positive airway pressure (PAP) therapy, including but not limited to CPAP therapy, Bi-PAP therapy, and OPAP therapy, and is commonly used to treat conditions such as obstructive sleep apnea (OSA), snoring, or chronic obstructive pulmonary disease (CODP).

[0003] An example of a humidification chamber has been described in our earlier international patent application WO2014 / 038968, the entire contents of which are incorporated herein by reference. Background Technology

[0004] Respiratory assist devices or systems that provide a humidified and heated gas flow to a patient for therapeutic purposes are well known in the art. Systems used to provide this type of therapy typically have the following configuration: gas is delivered from a gas source such as a blower (also known as a compressor, assisted breathing unit, fan unit, flow generator, or pressure generator) to a humidifier chamber. The gas becomes saturated with water vapor as it passes through hot water or heated and humidified air within the humidifier chamber. The heated and humidified gas is then delivered to a user or patient downstream of the humidifier chamber via a patient interface including a flexible gas conduit and a user interface.

[0005] Figure 1 A schematic diagram of a known type of respiratory support system 1 for delivering humidified and heated gas to a patient is shown. System 1 includes a housing 2 containing a blower unit 3 and a humidifier unit 4. In operation, atmospheric air 5 is drawn into the blower unit 3. The blower unit 3 generates a pressurized air or gas stream, which is delivered to the inlet 7 of a humidification chamber 8. The humidification chamber 8 contains water and is heated by a heating pad 9. The humidified and heated gas stream 10 exits the humidification chamber via an outlet 11 and is delivered to the patient or user 12 via a flexible hose or gas conduit 13 and a user interface 14, as shown. The blower unit and the humidification unit are typically connected via a series of connectors and / or conduits to allow gas to be transferred from the blower unit to the humidifier unit.

[0006] Figure 1 The user interface 14 shown is a nasal mask that covers the nose of the user 12. However, it should be noted that in these types of systems, a face mask covering the mouth and nose, a full-face mask, a nasal cannula, or any other suitable user interface may be used instead of the nasal mask shown. An oral-only interface or a mask may also be used. Furthermore, the patient or user end of the catheter may be connected to a tracheostomy fitting or endotracheal tube.

[0007] A humidification chamber 8 typically comprises a rigid plastic receiver or container that can be filled with a certain volume of water. In one known form, the base of the humidification chamber includes a circular, thermally conductive metal heating plate, which is fixed within complementary openings in the base of the humidification chamber by a plastic base that is overmolded around the peripheral edge of the heating plate. The overmolding forms a seal at the interface between the outer peripheral edge of the heating plate and the plastic base surrounding the chamber. In use, the heating plate contacts the heating element, heating pad, or heater base on which the humidification chamber is placed, and heats the certain volume of water in the chamber via conduction.

[0008] Purpose of the invention

[0009] Therefore, the purpose of this disclosure is to provide an improved humidification chamber that overcomes or at least improves one or more disadvantages of the prior art, or alternatively provides the public with at least a useful option.

[0010] Other purposes of this disclosure will become apparent from the following description. Summary of the Invention

[0011] According to one aspect of this disclosure, a humidification chamber for humidifying gas is provided, the humidification chamber comprising:

[0012] A bucket, configured to receive a certain volume of water;

[0013] A gas inlet for receiving a gas flow into the internal volume of the humidification chamber;

[0014] The gas outlet allows the humidified gas flow to exit the internal volume of the humidification chamber.

[0015] One or more filling orifices, the one or more filling orifices being in fluid communication with the bucket, allowing the bucket to be filled with water through the one or more filling orifices; and

[0016] A sealing closure configured to be releasably mounted on the humidification chamber, the sealing closure being configured to seal each filling orifice when mounted on the humidification chamber to prevent gas and / or vapor from escaping from the one or more filling orifices.

[0017] In one example, the sealing closure:

[0018] When viewed in a plan view, it is basically a rounded rectangle;

[0019] When viewed from the side, it is essentially flat and includes a top surface and a bottom surface;

[0020] Formed from an elastically deformable material;

[0021] It adopts a one-piece construction; and

[0022] It includes at least one sealing structure that protrudes from the lower surface and is configured to seal the filling orifice to prevent gas and / or vapor from escaping from the one or more filling orifices.

[0023] The sealing closure may include one or more sealing features configured to sealably engage a defined area of ​​the humidification chamber or adjacent to the one or more filling orifices to close the one or more filling orifices. In some instances, the humidification chamber may include multiple filling orifices, and the sealing closure includes corresponding multiple sealing features. Each sealing feature may include a plug suspended from the sealing closure, each plug being received in a corresponding filling orifice when the sealing closure is mounted on the humidification chamber.

[0024] The sealing closure may include a mounting configuration configured to engage the humidification chamber to mount the sealing closure to the humidification chamber, such that the sealing configuration maintains a sealing engagement with the humidification chamber. The mounting configuration may include at least one rib projecting outward from the sealing configuration.

[0025] At least a portion of the sealing closure may be elastically deformable. Preferably, at least each sealing configuration of the sealing closure is elastically deformable so that when the sealing closure is mounted on the humidification chamber, it at least partially deforms to form a sealing engagement with the area of ​​the humidification chamber that defines or is adjacent to the one or more filling orifices.

[0026] The sealing closure may also include a peripheral seal extending around the periphery of the sealing closure, the peripheral seal being configured to seal against one or both of the following:

[0027] The edge of the humidification chamber; and / or

[0028] Breathing equipment using this humidification chamber.

[0029] The peripheral seal may include a downwardly pointing peripheral skirt that hangs generally downward from the periphery of the seal. When viewed in cross-section, the peripheral skirt preferably includes a radially inwardly curved portion defining a channel configured to receive an edge of the humidification chamber and / or a portion of a breathing device using the humidification chamber when the seal is mounted on the humidification chamber. The peripheral seal may also include a bead projecting upward and / or radially outward from the upper surface of the seal. This bead may be configured to support a lid of a breathing device using the humidification chamber.

[0030] The sealing closure may include a hand-like or finger-like gripping structure configured to be gripped to remove the sealing closure from the humidification chamber. The hand-like or finger-like gripping structure may include tabs protruding from the sealing closure.

[0031] In one example, the sealing closure is substantially planar and may include an upper surface and a lower surface, the lower surface being adjacent to and / or in contact with the humidification chamber when the sealing closure is mounted on the humidification chamber, wherein the sealing construction protrudes from the lower surface. The shape and / or cross-sectional profile and / or dimensions of the lower surface of the sealing closure may be configured to correspond to and mate with the shape and / or cross-sectional profile and / or dimensions of the humidification chamber or portions adjacent to the lower surface when the sealing closure is mounted on the humidification chamber. The entire lower surface of the sealing closure may be configured to mate with the entire upper surface of the humidification chamber adjacent to the lower surface, such that the lower surface of the sealing closure abuts against the entire upper surface of the humidification chamber for sealing. The sealing closure may also be provided with at least one hinge or hinge region extending at least partially across the sealing closure and configured such that one end region of the sealing closure can be hinged relative to an opposite end region. The hinge region may include an elongated channel. In one instance, multiple parallel channels are provided that extend across the sealing closure from one edge to the other opposite edge.

[0032] The bucket can be formed of rigid plastic and includes a base surface and an outer peripheral wall extending upward from the base, wherein the base surface includes a heating plate. The heating plate can be fixed within an opening on the base surface of the bucket by overmolding. The heating plate can be metal.

[0033] The humidification chamber may also include a stepped structure surrounding the outer periphery of the inner surface of the bucket wall, the stepped structure being positioned above the base surface of the bucket at a height corresponding to the maximum fill line mark.

[0034] The base of the bucket is dome-shaped, causing it to curve outward toward the central apex defined by the heating plate.

[0035] The outer peripheral wall of the bucket includes one or more reinforced areas.

[0036] The humidification chamber may also include a lid hingedly connected to the water tank for closing the water tank to define the internal volume of the humidification chamber, and the lid is movable between a closed position, in which the water tank is closed by the lid, and in an open position, the water tank is open. One or more operable clamps may be provided for securing the lid in the closed position; the sealing closure is configured to be releasably mounted on the lid. The lid and the water tank may be hingedly connected by a movable hinge and integrally formed as a single article. The gas inlet and the gas outlet may be located on opposite sides of the lid. The lid may include a vertical flow plane extending downward from the lower side of the lid in a central region of the lid. The vertical flow plane may also include a pair of side baffles, each extending from a respective side edge of the vertical flow plane toward a side of the lid including the gas inlet.

[0037] The gas inlet can be connected to an inlet conduit that extends between an inlet end and an outlet end at the gas inlet, the outlet end being located in or toward the upper central region of the internal volume of the humidification chamber and adjacent to the first side surface of the vertical flow plane, such that the incoming gas flow enters the internal volume of the humidification chamber at the upper central region.

[0038] A flow guide configuration in the form of a reverse-curved ramp surface can be located between the outlet end of the inlet conduit and the first side surface of the vertical flow plane.

[0039] The gas outlet can be connected to an outlet conduit that extends between the inlet end located in or toward the upper central region of the internal volume of the humidification chamber and the second side adjacent to the vertical flow plane and the outlet end at the gas outlet.

[0040] The gas outlet may include a mating surface surrounding the outer periphery of the gas outlet, the mating surface being inclined outward such that the upper portion of the mating surface is displaced further outward than the lower portion of the mating surface.

[0041] At least one water-filled orifice may include an associated maximum water level indicator, which includes a tab member supported from the lower side of the top of the bucket or lid, such that the tab member extends into the field of view of the internal volume of the humidification chamber directly visible through the water-filled orifice.

[0042] Preferably, the humidifying chamber has an integral shape defined by a front wall, an end wall, and a wall extending between the upper surface of the lid and the base surface of the water tank, with side walls extending between the front wall and the end wall, and wherein the lid is hingedly connected to the water tank at the rear end of the humidifying chamber, and at least one operable clamp is provided at the front end of the humidifying chamber. The at least one operable clamp may be provided in the form of a torsion clamp, which is mounted to the lid or the water tank and configured to engage with a catch provided on the water tank or the lid, respectively. At least one operable clamp may be provided that is hingedly connected to the lid or the water tank and configured to engage with a catch provided on the water tank or the lid, respectively.

[0043] A seal may be disposed around the outer periphery of the chamber between the cover and the bucket to seal the chamber when it is in the closed position.

[0044] According to another aspect of this disclosure, a breathing assist device is provided, configured to provide a heated and humidified gas flow, the breathing assist device comprising:

[0045] The device gas inlet is configured to receive a gas supply.

[0046] A blower configured to generate a pressurized gas flow from the gas supply;

[0047] A humidifier configured to heat and humidify the pressurized gas stream;

[0048] The gas outlet of the device for the heated and humidified gas stream; and

[0049] The flow path for the gas flow extends from the gas inlet through the breathing device, through the blower unit and the humidification unit, to the gas outlet.

[0050] Furthermore, the humidifier includes a sealable humidification compartment configured to receive and retain the humidification chamber as described above.

[0051] The humidification chamber may include a lid that is movable between an open position and a closed position, the open position allowing the humidification chamber to be removed and the closed position retaining the humidification chamber within the humidification compartment.

[0052] The humidification compartment may include a gas inlet connected to the flow path to receive the pressurized gas flow from the blower to form a pressurized humidification compartment; and a gas outlet connected to the device gas outlet of the flow path.

[0053] The gas inlet of the humidification chamber can be opened within the humidification compartment to receive the incoming gas flow from the pressurized humidification compartment.

[0054] The gas outlet of the humidification compartment can be sealed to the gas outlet of the humidification chamber.

[0055] The humidification compartment may include a heating pad, and the humidification chamber is located on the heating pad.

[0056] The device can be housed in a single enclosure.

[0057] This device can be a CPAP breathing device.

[0058] According to another aspect of this disclosure, a sealing closure is provided for a humidification chamber for humidifying gas, the humidification chamber comprising:

[0059] A bucket, configured to receive a certain volume of water;

[0060] A gas inlet for receiving a gas flow into the internal volume of the humidification chamber;

[0061] The gas outlet allows the humidified gas flow to exit the internal volume of the humidification chamber.

[0062] One or more filling orifices, which are in fluid communication with the bucket, so that the bucket can be filled with water through the filling orifice or each filling orifice;

[0063] The sealing closure is configured to be releasably mounted on the humidification chamber, and the sealing closure is further configured to seal the filling orifice or each filling orifice when the sealing closure is mounted on the humidification chamber to prevent gas and / or vapor from escaping from the one or more filling orifices.

[0064] According to another aspect of this disclosure, a sealing closure is provided for sealingly closing at least one filling orifice of a humidification chamber for humidifying gas, the sealing closure being:

[0065] When viewed in a plan view, it is basically a rounded rectangle;

[0066] When viewed from the side, it is essentially flat and includes a top surface and a bottom surface;

[0067] Formed from an elastically deformable material;

[0068] It adopts a one-piece construction;

[0069] It is configured to be releasably mounted on the humidification chamber; and

[0070] It includes at least one sealing structure that protrudes from the lower surface and is configured to seal the filling orifice to prevent gas and / or vapor from escaping from the one or more filling orifices.

[0071] The reference to the ranges of numbers disclosed herein (e.g., 1 to 10) is also intended to include reference to all rational numbers within that range (e.g., 1, 1.1, 2, 3, 3.9, 4, 5, 6, 6.5, 7, 8, 9, and 10) and any range of rational numbers within that range (e.g., 2 to 8, 1.5 to 5.5, and 3.1 to 4.7), and therefore, all subranges of all ranges explicitly disclosed herein are hereby expressly disclosed. These are merely examples of specific intentions, and all possible combinations of numerical values ​​between the listed minimum and maximum values ​​should be considered as expressly stated in a similar manner in this application.

[0072] As used in this article, the term "and / or" means "and" or "or" or both.

[0073] As used in this article, the “(s)” following a noun refers to the plural and / or singular form of the noun.

[0074] This disclosure includes the foregoing and also envisions the following structures, which are given as examples only.

[0075] Other aspects that should be considered among all the novel aspects of this disclosure will become apparent from the following description. Attached Figure Description

[0076] Preferred embodiments of this disclosure will be described by way of example only with reference to the accompanying drawings, in which:

[0077] Figure 1 A schematic diagram of a known form of respiratory support device is shown, in which a blower unit and a humidifier unit are integrated into a single main housing;

[0078] Figure 2 A schematic diagram of the main components and configuration of a respiratory assist device that can utilize the humidification chamber and seals of this disclosure is shown;

[0079] Figure 3 A lower perspective view of a closed humidification chamber according to a first embodiment is shown, wherein a sealing closure according to the present disclosure can be used, the humidification chamber including a lid, a discontinuous bracket and a water tank;

[0080] Figure 4 It shows Figure 3 A floor plan of the humidification chamber;

[0081] Figure 5 It shows Figure 3 Lower view of the humidification chamber;

[0082] Figure 6 It shows Figure 3 A side view of the humidification chamber from the gas inlet side;

[0083] Figure 7 It shows Figure 3 A side view of the humidification chamber on the gas outlet side;

[0084] Figure 8 It shows Figure 3 A front view of the rear end of the humidification chamber;

[0085] Figure 9 It shows Figure 3 A front view of the front end of the humidification chamber;

[0086] Figure 10 Is it through Figure 6 The perspective cross-sectional view of the closed humidification chamber obtained by line AA;

[0087] Figure 11A , Figure 11B and Figure 11C It shows Figure 3 The upper perspective view, side front view, and lower perspective view of the water tank in the humidification chamber;

[0088] Figure 12 It shows Figure 3 A close-up perspective view of the upper side of the lid of the humidification chamber;

[0089] Figure 13 It shows Figure 3 A close-up perspective view of the underside of the lid of the humidification chamber;

[0090] Figure 14 It shows Figure 3 Another close-up perspective view of the underside of the lid of the humidification chamber;

[0091] Figure 15 It shows crossing Figure 4 A cross-sectional view of the closed humidification chamber obtained by the line CC;

[0092] Figure 16A A perspective view of the humidification chamber of the first embodiment is shown, but with a clamping mechanism of a first alternative form and wherein the humidification chamber is closed;

[0093] Figure 16B It shows Figure 16A The humidification chamber is in the open position and the water tank has been removed from it;

[0094] Figure 17A A perspective view of the humidification chamber of the first embodiment is shown, but with a fourth alternative form of clamping mechanism and wherein the humidification chamber is closed;

[0095] Figure 17B It shows Figure 17A Side front view of the humidification chamber;

[0096] Figure 18A A cross-sectional view of the humidification chamber of the first embodiment is shown, wherein the first alternative water level mark adopts a variant of the convex water level mark;

[0097] Figure 18B It shows crossing Figure 18A A plan view of the water-filled orifice of the humidification chamber lid is shown, along with an alternative form of the convex water level indicator.

[0098] Figure 19 A cross-sectional view of the humidification chamber of the first embodiment is shown, wherein the water level indicator of the second alternative type takes the form of a conical water level indicator;

[0099] Figure 20 A plan view of the lid of the humidification chamber in Figure 25 is shown, along with a user's view of the conical water level indicator;

[0100] Figure 21A A perspective view of a closed humidification chamber including a lid, a complete bracket, and a water tank according to a second embodiment is shown;

[0101] Figure 21B The cover and bracket of the humidification chamber of the second embodiment are shown, with the cover and bracket in the open position, wherein the water tank is omitted;

[0102] Figure 21C A perspective view of the front end of the complete bracket of the humidification chamber of the second embodiment and the fastener of the clamping mechanism is shown;

[0103] Figure 22A A first upper perspective view of a humidification chamber in the closed position according to a third embodiment is shown, the humidification chamber including a lid and a water tank with a molded heating plate, and the rear end and gas inlet side of the humidifier chamber are shown;

[0104] Figure 22B It shows Figure 22A The second upper perspective view of the humidification chamber of the third embodiment is shown, and the front end and gas outlet side of the humidification chamber are also shown.

[0105] Figure 22C It shows Figure 22A A plan view of the humidification chamber in the third embodiment;

[0106] Figure 22D It shows Figure 22A The lower side view of the humidification chamber of the third embodiment;

[0107] Figure 22E It shows Figure 22A A side front view of the gas inlet side of the humidification chamber in the third embodiment;

[0108] Figure 22F It shows Figure 22A A side front view of the gas outlet side of the humidification chamber in the third embodiment;

[0109] Figure 22G It shows Figure 22A A front view of the rear end of the humidification chamber in the third embodiment;

[0110] Figure 22H It shows Figure 22A A front view of the front end of the humidification chamber in the third embodiment;

[0111] Figure 22I It shows crossing Figure 22C A cross-sectional view of the humidification chamber of the third embodiment obtained by line EE;

[0112] Figure 22J It shows Figure 22I A close-up view of the FF area;

[0113] Figure 22K It shows the relationship with Figure 22H A front view of the front end of the humidification chamber of a third embodiment, similar in shape but at an angle showing the angular profile of the gas outlet;

[0114] Figure 22L A top perspective view of the humidification chamber of the third embodiment in the open position is shown;

[0115] Figure 22M A lower perspective view of the humidification chamber of the third embodiment in the open position is shown;

[0116] Figure 22N Another perspective view of the humidification chamber of the third embodiment in the open position is shown from the gas inlet side of the humidification chamber;

[0117] Figure 22O A first upper perspective view is shown of the lower portion of the humidification compartment for receiving the humidification chamber of the third embodiment, wherein the gas inlet of the compartment is visible;

[0118] Figure 22P It shows Figure 22O The second upper perspective view of the humidification compartment section, in which the gas outlet of the compartment is visible;

[0119] Figure 22Q It shows the installation Figure 22O A plan view of the humidification chamber in the third embodiment of the humidification compartment section;

[0120] Figure 22R It shows the installation Figure 22O A side perspective view of the humidification chamber in the third embodiment of the humidification compartment section;

[0121] Figure 22S It shows crossing Figure 22Q A cross-sectional view of the humidification chamber of the third embodiment, obtained by line GG and installed in the humidification compartment section;

[0122] Figure 22T It shows crossing Figure 22Q A cross-sectional view of the humidification chamber of the third embodiment, obtained by line HH, installed in the humidification compartment section;

[0123] Figure 23A A perspective view of the humidification chamber of a fourth embodiment, including a lid, a sleeve, and a water tank, is shown.

[0124] Figure 23B A cross-sectional view obtained through the humidification chamber of the fourth embodiment is shown;

[0125] Figure 24A A perspective view of the lid of a humidification chamber, including a lid clipped into a water bucket, according to a fifth embodiment of the present disclosure is shown;

[0126] Figure 24B A perspective view of the water tank in the humidification chamber of the fifth embodiment is shown;

[0127] Figure 24C A perspective view of the lid and water tank of the humidification chamber in the fifth embodiment, in an assembled and closed configuration, is shown;

[0128] Figure 25A A top perspective view of a closed humidification chamber, including a conduit cap clipped into a water tank, is shown according to a sixth embodiment.

[0129] Figure 25B A lower perspective view of the humidification chamber of the sixth embodiment is shown;

[0130] Figure 26 It shows Figure 3 A close-up cross-sectional view of the rear end of a modified humidification chamber of the first embodiment, having a seal between the lid and the water tank.

[0131] Figure 27 A top perspective view of the humidification chamber sealing closure according to this disclosure is shown;

[0132] Figure 28 It shows Figure 27 The lower perspective view of the sealing closure;

[0133] Figure 29It shows Figure 27 and Figure 28 A plan view of the sealing and closure component;

[0134] Figure 30 It shows Figures 27 to 29 The lower side view of the sealing component;

[0135] Figure 31 It shows Figures 27 to 30 Side view of the sealing closure;

[0136] Figure 32 It shows Figures 27 to 31 A view of the sealing closure;

[0137] Figure 33 It shows crossing Figure 29 The line BB cut Figures 27 to 32 A cross-sectional view of the sealing component;

[0138] Figure 34 It shows crossing Figure 29 The line AA is intercepted Figures 27 to 32 A cross-sectional view of the sealing component;

[0139] Figure 35 It shows crossing Figure 29 The line DD cut Figures 27 to 32 A cross-sectional view of the sealing component;

[0140] Figure 36 It shows Figure 33 The enlarged portion of region "C" of the sealing closure; and

[0141] Figure 37 It shows Figure 34 The enlarged portion of the "E" area of ​​the sealing component. Detailed Implementation

[0142] Throughout this specification, similar reference numerals will be used to refer to similar features in different embodiments.

[0143] This disclosure relates to a humidification chamber for a respiratory assist device (breathing apparatus) that supplies a heated and humidified flow of respiratory gas to a user or patient for respiratory therapy, such as, but not limited to, CPAP therapy.

[0144] In the context, Figure 2An example of a typical schematic configuration of a breathing apparatus 20 is shown, in which the humidification chamber of this disclosure may be employed, but this is not intended to limit the use of the humidification chamber. The breathing apparatus 20 includes a humidification unit or humidification compartment 22 that receives and holds a removable humidification chamber 24 during use. In this embodiment, the humidification compartment 22 may be formed within the housing of the breathing apparatus and may be an openable compartment with a lid, thus allowing access to the humidification chamber 24 within the humidification compartment 22 for removal for cleaning or refilling. Typically, the humidification compartment 22 is sealed and / or pressurized when the lid is closed. The humidification chamber 24 is filled with a volume of water, as shown at 26, and the chamber 24 rests on a heating pad or heater base 28. As known in the art, the heating pad 28 is powered to heat the water 26 in the humidification chamber 24 during use via heat transfer through the base of the humidification chamber 24, at least a portion of which is thermally conductive.

[0145] The breathing device 20 includes a blower 30 that draws in atmospheric air or other therapeutic gases through an inlet 32 ​​and generates a pressurized gas flow 34 at the blower's outlet. The outlet of the blower 30 is fluidly connected to the inlet 36 of the humidification compartment 22 via a connecting conduit 38 extending to the inlet 36 of the humidification compartment 22. Since the humidification compartment is sealed when closed, the gas flow 34 entering the inlet 36 pressurizes the compartment, and the gas flows into the open gas inlet 37 of the humidification chamber 24. It should be understood that, in alternative embodiments, the inlets 36, 37 of the compartment 22 and the chamber 24 may be hermetically connected via connectors or other sealing configurations.

[0146] Pressurized gas flows through the humidification chamber 24 and exits via the gas outlet 40 of the humidification chamber. In this embodiment, the gas outlet 40 of chamber 24 is hermetically connected to or sealed to the outlet 41 of the humidification compartment 22, as shown. It should be understood that in alternative embodiments, the outlets 40, 41 of compartment 22 and chamber 24 do not need to be hermetically connected via connectors or otherwise sealed. In the illustrated embodiment, the outlet 41 of the humidification compartment 22 is fluidly connected to the patient interface via a connector and / or conduit for delivery to the patient 42. The patient interface typically includes a flexible gas conduit 44, which is coupled at one end to the main gas outlet of the breathing device 20 and at the other end to the user interface 46.

[0147] In the following embodiments, the humidification chamber 24 is typically received and held within a complementary, closed, and sealable humidification compartment 22 formed within the housing of the breathing device 20. However, it should be understood that in alternative embodiments, the humidification chamber 24 may alternatively be received and held in an open or exposed compartment or on a support platform including a heating pad 28, wherein the gas inlet of the chamber is connected to a blower outlet via a conduit and / or connector, and the gas outlet of the chamber is directly or indirectly connected to a patient interface via a conduit and / or connector.

[0148] Humidification chamber - discontinuous bracket and cover.

[0149] refer to Figures 3 to 15 The first embodiment of the humidification chamber 50 will be explained in more detail below. As described above, the humidification chamber 50 is configured to be received and held within a complementary humidification compartment (not shown) located within the housing of the breathing apparatus. Typically, the compartment includes a heater base or heating pad on which the humidification chamber is located. The humidification compartment is accessible via an openable cover, allowing the humidification chamber 50 to be inserted and removed as needed, for example, for cleaning and / or refilling.

[0150] like Figure 3 As shown, the humidification chamber or chamber assembly 50 includes a bracket or lower portion, generally indicated by 52, which is shaped to receive and hold a bucket or container 54 of complementary size and dimensions. An upper portion or lid 56 is hinged to the bracket 52 and is available in a closed position (…). Figure 3 (As shown in the diagram) The lid moves between a closed position, in which the lid securely holds the bucket 54 within the bracket 52, and in an open position, the lid pivots away from the bracket 52 so that the bucket 54 can be removed from the bracket for, for example, cleaning, refilling, or replacement. As will be explained later, the lid may include a baffle in the form of a conduit and / or a flow plane and guide to control the flow path of gas through the chamber between the inlet and outlet.

[0151] In this embodiment, the bracket 52 and the lid 56 are formed from rigid plastic by injection molding or the like. Typically, the bracket 52, lid 56, and the hinged connection between these two components are integrally formed as a single object; however, in alternative embodiments, the lid and bracket may be formed as separate components and subsequently hingedly connected via one or more hinges. Depending on design requirements, the lid and / or bracket may be substantially transparent or formed as opaque. The bucket or chamber base 54 is formed from a rigid and thermally conductive material, typically pressed or formed from a sheet of metal such as aluminum, stainless steel, or any other suitable material, or may be formed, for example, by die casting.

[0152] It should be understood that, in alternative embodiments, the bracket 52, lid 56, and bucket 54 may be formed from other materials or in other ways. For example, the bracket 52 and lid 56 may be formed by vacuum forming. The bracket and / or lid may also be formed from metal, whether by pressing a sheet metal or, for example, by die casting. In alternative embodiments, the bucket may instead be formed from thermally conductive plastic.

[0153] Shape of the humidification chamber

[0154] In this embodiment, the humidification chamber 50 is generally rectangular in shape, such as... Figure 4 As shown in the plan view, the humidification chamber 50 is defined by a first end 58 and a second end 60, with a first side 62 and a second side 64 extending between the first and second ends. In this interpretation, the first end 58 is considered the rear end of the humidification chamber, and the second end 60 is considered the front end. The first side 62 can be considered the inlet side of the humidification chamber because it contains an inlet through which pressurized gas from the blower enters the humidification chamber. The second side 64 can be considered the outlet side of the humidification chamber because it contains an outlet through which the humidifying gas flow exits the humidification chamber. It should be understood that in alternative descriptions of the chamber, depending on the context, these ends can be considered as sides, and vice versa.

[0155] In this embodiment, the corners connecting the ends 58, 60 and the sides 62, 64 are curved or rounded, as generally indicated at 66, but this is not required, and these corners can be right angles or any other contour shape. In this embodiment, the corner 66a connecting the front end 60 and the inlet side 62 is larger than the other corners, but this is not required. It should be understood that in alternative embodiments, the humidification chamber assembly can be formed into any desired shape or contour, including circular or other shapes, and the same structural and construction principles will generally be applied.

[0156] bracket

[0157] The bracket 52 is configured to receive and hold a bucket 54 having a complementary shape and slightly smaller size, allowing it to slide downward into the opening formed by the bracket. The tightness of the fit between the bucket 54 and the bracket 52 can be varied. In some embodiments, it can utilize a friction fit, and in other embodiments, it can be a loose fit, allowing the bucket to easily slide in and out of the bracket for assembly or release, preferably without any or minimal force or pressure applied by the user. When the chamber is closed, the bracket serves to hold the bucket firmly and accurately against the lid. Specifically, the bracket typically holds the bucket around the lid across the entire opening of the chamber to prevent / minimize water splashing between the lid and the bucket. The bracket also has the dual function of holding the bucket in place while simultaneously hinged to the lid, and keeping the lid and bucket aligned so that the user does not need to align the lid and bucket when closing the chamber.

[0158] In this embodiment, end wall constructions 74 and 76 each extend around the entire corner region of the bracket and terminate along the corresponding side of the bracket before meeting each other, thereby providing open side wall constructions in the bracket that expose the bucket 54 when it is held in the bracket 52. For example, Figure 6 The entrance side of bracket 52 is shown, wherein the front end wall 74 and the rear end wall 76 extend around the corresponding corners 74a, 76a of the bracket and along the side of the bracket, and each terminates at an inclined curved edge 74c, 76c extending downward from the upper edge of the bracket to the base 70. It should be understood that the terminating edges 74c, 76c do not necessarily need to descend at an angle with the curved profile, but if required, in alternative forms of the bracket, they could be abruptly vertical edges. Similarly, in Figure 7 A similar configuration is provided on the opposite exit side of the bracket shown. On the exit side, end walls 74 and 76 also extend around the corresponding corners 74b and 76b and terminate at the inclined curved edges 74d and 76d that extend downward from the upper edge of the bracket to the base.

[0159] The bracket 52 essentially surrounds the bucket 54 at least around the opposite end walls and additionally around the corners of the bucket 54. For example... Figure 6 and Figure 7As shown, in this embodiment, the outer peripheral wall of the bracket is discontinuous, such that the bracket wall does not completely or continuously surround or encircle the entire outer peripheral wall of the bucket 54, thereby exposing one or more portions of the bucket wall (not covered by the bracket). In this embodiment, the bracket wall is discontinuous on each side of the bracket, such that a large portion of the side wall of the bucket 54 is exposed (i.e., not covered by the bracket wall). For example, in this embodiment, opposing end walls 74 and 76 terminate at edges on the sides of the bracket at or toward their respective ends. It should be understood that the displacement or distance between the terminating edges of end walls 74 and 76 on each side can be varied to expose more or less of the bucket side wall portion as needed. For example, any one or both of the end walls may terminate at or toward the center of the wall or further toward a corner portion of the wall.

[0160] During use, the bracket provides a heat barrier or surface, allowing the user to grasp or hold the humidification chamber after it has been removed from the breathing apparatus for purposes such as refilling or cleaning. This allows the user to avoid direct contact with the heated water tank, thus preventing potential burns or discomfort. Furthermore, the tank is detachable from the bracket, allowing for thorough cleaning of both parts.

[0161] bucket

[0162] refer to Figures 11A to 11C A separate bucket 54 is shown. As previously described, the bucket 54 is typically formed of a metal sheet or similar material and functions as a receiver or container for holding a volume of liquid, such as water. As shown, the bucket 54 has a shape complementary to the bracket, such that the bucket 54 can be securely received in the bracket 52, for example, via a slidable engagement utilizing a friction fit.

[0163] In this embodiment, the bucket 54 is substantially rectangular, having a base or base surface 80 from which an upwardly extending outer peripheral wall extends. Specifically, the bucket 54 includes a front wall 82 and a rear wall 84, and a first side wall 86 and a second side wall 88 extending between the end walls. The corner wall portion 90 joining the end walls and side walls is preferably curved or rounded, having the characteristics of the previously referenced... Figure 4 The overall bracket plan view is explained by complementary curvatures or radii. As shown, one of the corners 90a has a larger radius than the others to complement the larger corner 66a of the bracket. This configuration allows the bucket to be received in the bracket in only a single orientation, thus aiding the user in assembling the parts so that the inlet and outlet of the chamber and humidification compartment are correctly aligned with each other. It should be understood that the bucket, bracket, and lid can have any other profiled corners, including 90° right angles, and the profiled corners can be consistent or inconsistent between the corners.

[0164] refer to Figure 11B The upper edge of the outer peripheral wall is provided with a continuously outwardly extending lip, flange, or edge 92. In this embodiment, the lip 92 extends substantially horizontally or laterally outward from the vertical outer peripheral wall at the upper edge of the outer peripheral wall. The outer peripheral lip 92 is optional. For example, when provided, it is configured to engage, abut, or rest on the upper edges 74e, 76e of the end walls 74 and 76 of the bracket 52 (see...). Figure 13 and Figure 14 On, and Figure 10 It is easier to see in the cross-sectional view.

[0165] The bucket 54 is provided with a heat transfer contact surface or portion 94 protruding from the underside of the base surface 80. The contact surface 94 is preferably integrally formed with the rest of the bucket. For example, the contact surface 94 can be pressed out from the base surface 80. In this embodiment, the contact surface 94 is circular and has a diameter substantially complementary to the central aperture 72 provided in the base surface 70 of the bracket 52 (see [link to previous embodiment]). Figure 13 Specifically, the contact surface 94 of the bucket 54 is substantially aligned with the complementary aperture 72 of the bracket 52 and has a depth relative to the rest of the base surface 80, such that it extends through the aperture 72 to protrude below the underside of the base surface 70 of the bracket, as shown. Figure 6 As shown. When the humidification chamber 50 is inserted into the complementary humidification compartment in the breathing apparatus, the protruding contact surface 94 of the water tank 54 rests on or is adjacent to the heater base or pad inside the compartment. This protruding contact surface may have a complementary size and shape, but this is not necessary. As will be understood, heat from the heater base is then transferred via conduction through the thermally conductive (e.g., metallic) contact surface 94 to a certain volume of water in the water tank.

[0166] In alternative embodiments, the contact surface does not necessarily need to protrude beyond the remainder of the base surface 80 of the bucket. For example, in one alternative embodiment, the base surface 80 may be planar with a flush contact surface 94, and the heater base or pad may be shaped such that it protrudes through the aperture 72 of the bracket to engage or contact the base surface 80 of the bucket 54. In another alternative embodiment, the contact surface 94 may be recessed relative to the remaining lower side of the base surface 80 of the bucket, i.e., protruding upward into the bucket. In this embodiment, the complementary heater base or pad may similarly be configured with a height and shape that allow it to protrude through the aperture 72 in the bracket to engage into a recess or cavity formed by the recessed contact surface in the base of the bucket 54.

[0167] In the above embodiments, the contact surface and related components are described for a circular contact surface and a heating pad, but it should be understood that any other alternative shape of contact surface may be used, including square, rectangular or any other suitable shape.

[0168] Humidifier chamber lid

[0169] refer to Figure 3 and Figure 4 When in the floor plan (see Figure 4 When viewed in the image, the lid 56 of the humidification chamber 50 has a shape that substantially corresponds to the shape of the bracket 52 and the water tank 54. In this embodiment, the lid includes a main body portion 100 that forms the upper surface or top of the humidification chamber and has a generally rectangular overall shape with rounded corners, corresponding to the external shape of the bracket 52 and the water tank 54. An outer peripheral wall extends downward from the main body portion 100. For example, as can be most clearly seen in Figure 18, a front end wall 102 and a rear end wall 104 are provided at each end of the main body portion. Furthermore, a first side wall 106 and a second side wall 108 extend along the side of the main body portion 100 between the front end wall 102 and the rear end wall 104. The first side wall 106 is located on the inlet side of the humidification chamber, and the second side wall 108 is located on the outlet side of the humidification chamber. A rounded corner wall portion 110 is also provided, which joins the side walls and the end walls to form the entire outer peripheral wall extending vertically downward from the substantially horizontally extending main body portion 100.

[0170] In this embodiment, a peripheral protrusion or flange 105 is provided around the entire outer periphery of the lid (see [reference]). Figure 10 and Figure 13 In this embodiment, the protrusion 105 extends outward from the outer peripheral wall and in a substantially horizontal direction, but an angled protrusion can be used instead. The protrusion is positioned toward the lower edge 107 of the outer peripheral vertical wall of the lid 56 but is displaced from that lower edge. In use, the lower surface of the protrusion 105 of the lid is configured to abut or engage with the upper surface of the edge 92 of the bucket 54. In this embodiment, the outer surface of the lower outer peripheral wall portion 91 of the lid 56 below the protrusion 105 has a certain gap (i.e., a slight displacement) with the adjacent inner surface of the upper outer peripheral wall portion 93 of the bucket below the edge 92, such as... Figure 10 As shown. This allows the lid to engage and disengage from the bucket without requiring significant force from the user. In this embodiment, the lower outer peripheral wall portion 91 of the lid acts as a baffle or shield, as it deflects water to prevent splashing between the lid and the bucket, and also helps align the lid for engagement with the bucket when the user closes the chamber. It should be understood that other embodiments can be configured for a tighter frictional fit, such that the lower outer peripheral wall portion 91 of the lid abuts against or contacts the upper outer peripheral wall portion 93 of the bucket.

[0171] Water-filled holes

[0172] refer to Figure 3 and Figure 4 The lid 56 is provided with one or more water-filling orifices or holes through which water can be poured to fill or refill the water tank 54 of the humidification chamber. In this embodiment, two identical water-filling orifices are provided, typically indicated at 120, one located or facing the front end of the lid and the other located or facing the rear end of the lid, but the positions of the water-filling orifices may differ from this configuration. In this embodiment, each water-filling orifice is provided by a funnel-shaped construction extending from the body portion 100 of the lid into the humidification chamber. For example, each water-filling orifice 120 is provided with a truncated conical construction 122 having a first end flush with the body portion 100 of the lid and extending downward into the humidification chamber, having a gradually decreasing diameter to terminate at a second end corresponding to the edge 124 of the water-filling orifice, which in this case is rounded. It should be understood that the funnel-shaped construction of the water-filling orifice is optional but helps to reduce splashing or overflow during filling of the chamber. In an alternative embodiment, the water-filled hole may simply be a circular or other shaped opening formed in the body portion, without any such guiding funnel-shaped construction.

[0173] In this embodiment, each water-filling orifice 120 is provided with one or more concentric circular raised sealing ribs 121 or protrusions extending around the outer periphery of the water-filling orifice. These sealing ribs 121 may be integrally formed with or attached to the cap. The sealing ribs 121 may be formed of rigid or hard plastic, allowing a soft seal to engage sealingly with the rib to close the water-filling orifice. By way of example, in use, the soft seal may be provided on the cap of the humidification compartment where the chamber is located. In an alternative embodiment, the rib 121 may be a soft, overmolded plastic, rubber, or silicone resin for sealingly engaging with a hard surface or construction on the cap of the humidification compartment to close the water-filling orifice when used within a breathing device.

[0174] Water level marker

[0175] refer to Figure 13 The humidification chamber 50 may include at least one water level indicator configured to provide the user with at least an indication of when the water level is approaching the maximum water level. In this embodiment, a water level indicator 130 is provided for each water fill orifice 120, and the water level indicator is in the form of a tabbed water level indicator 130, including a tab or member that supports the lid and extends downward into the internal volume of the humidification chamber and specifically enters the area defined by the water tank 54.

[0176] Lid entrance

[0177] The cover 56 of the humidification chamber 50 is provided with a gas inlet, through which pressurized gas generated by the blower of the breathing device flows into the interior of the humidification chamber 50. (Reference) Figures 3 to 6 The gas inlet 140 is located on the inlet side 62 of the humidification chamber 50. For example... Figure 6 As shown, the gas inlet 140 is provided in the form of an orifice, which is rectangular in this case, but can be any other shape, such as circular or other shapes, provided through the outer peripheral wall 106 on the inlet side of the cover 56. In this embodiment, the gas inlet 140 is centrally located along the outer peripheral wall 106, but this position can be changed. (See reference...) Figure 13 In this embodiment, the inlet orifice 140 is provided with an associated inlet channel or conduit 142 that guides or directs the inlet gas flow to the central area or region of the cover before exiting the conduit 142 into the interior of the humidification chamber. In this embodiment, the inlet conduit 142 extends between a first end 142a located at the inlet orifice on the wall 106 and a second end 142b positioned toward the central area of ​​the cover, and terminates at the second end. The hollow inlet conduit 142 has a cross-sectional shape corresponding to the shape of the inlet orifice 140 and extends inwardly in a substantially horizontal direction from the vertical outer peripheral wall 106 of the cover 52. The inlet conduit 142 extends into the central area of ​​the cover to help minimize or reduce water backflow into the blower and device in the event that the breathing device is accidentally tilted or tipped over from its normal upright operating orientation.

[0178] In this embodiment, the gas inlet 140 and inlet conduit 142 are located at or toward the top of the lid. However, in an alternative embodiment, the lid may be deeper and have a higher outer peripheral wall, and the inlet 140 and conduit 142 may be displaced away from the top of the lid, for example, located at or toward the bottom of the lid. This configuration provides a volume of space above the inlet in the lid for collecting water during tilting of the chamber and can reduce the likelihood of backflow through the water inlet.

[0179] At the outlet of the inlet conduit 142, a flow guiding structure 144 is provided to guide the gas flow away from the inlet conduit. In this embodiment, the flow direction structure 144 is in the form of a curved, reverse-sloping surface that begins at or toward the body portion 100 of the cover at the outlet end 142b of the inlet conduit 142 and terminates at a first side 146b of a vertical flow plate 146 extending downward from the body portion 100 of the cover. This configuration causes some of the incoming gas flow to veer back toward the inlet wall of the humidification chamber, where the gas flow is humidified, and then circulates backward around the side edge 146e of the flow plate 146 toward the outlet of the humidification chamber. This configuration also helps to direct the airflow directly into the water surface to increase the absorption of moisture from the water into the incoming gas. The vertical flow plane 146 is displaced from the outlet end 142b of the inlet conduit 142.

[0180] Figure 15 A first side 146b of the vertical flow plate 146 is shown. In this embodiment, the width (W) of the vertical flow plate 146 or baffle is shorter than the total length of the humidification chamber from the front end 60 to the rear end 58, but preferably wider than the width (Wl) of the inlet conduit 142. In this embodiment, the height (H) of the vertical flow plate is such that its lower edge 146a extends at least below the lower edge 142a of the inlet conduit 142, and generally extends further below the horizontal maximum water level line indicated by the marking configuration 138 of the convex water level indicator. In this embodiment, the lower edge 146a of the vertical flow plane 146a lies between the maximum water level marking configuration 138 and the lower base surface 80 of the water tank 54, but in an alternative embodiment it may extend substantially to the bottom surface 80 of the water tank 54. Preferably, for a volume of water at least reaching the maximum water level, the height of the vertical flow plate 146 is such that its lower edge 146a extends to or through the surface of a certain volume of water in the bucket 54, and more preferably, the lower edge 146a is configured to extend into the water surface for at least a portion of the water volume below the maximum water level, and even more preferably for all of the water volume (i.e., where the lower edge 146a substantially extends to the base surface of the bucket). Typically, the height of the flow plate is configured such that it protrudes or penetrates deeply enough into the water surface to prevent gas leaving the inlet conduit 142 from passing under the lower edge 146a and directly reaching the outlet conduit 152, thus forcing the gas to flow around the flow plate and increasing the path of the gas around the chamber before leaving it, while simultaneously exposing it to water vapor. If the height of the flow plate is too low, allowing the gas to travel directly under the flow plate to the outlet, this results in a shortened flow path and reduced humidification, and also causes the gas flow to blow or splash water into the outlet conduit 152 as it travels upwards from below the flow plate.

[0181] Cover outlet

[0182] refer to Figure 4 and Figure 7 The gas outlet 150 is located on the side of the humidification chamber opposite to the gas inlet 140. In this embodiment, the gas outlet 150 is located on the outer peripheral wall 108 of the cover 56 of the humidification chamber on the outlet side, and similarly, the gas inlet 140 is centered relative to the front and rear ends of the humidification chamber, but this is not necessary. The gas outlet 150 includes an orifice extending through the outer peripheral wall 108, which is substantially rectangular, but other orifice shapes, such as circular or others, can be used alternatively. Once the gas has been heated and humidified in the humidification chamber, the gas flow exits the humidification chamber via the gas outlet 150.

[0183] refer to Figure 14 As shown in Figure 17, in this embodiment, the gas outlet 150 includes an outlet conduit 152 that extends from the gas outlet orifice in a horizontal or vertical direction relative to the outer peripheral wall 108 to the central area or region of the humidification chamber cover. Specifically, the outlet conduit 152 extends from a first end 152a located at the orifice of the gas outlet 150 in the wall 108, and extends into the interior of the cover 56, terminating at a second end 152b. In this embodiment, the second end 152b of the outlet conduit 152 abuts or engages with a second side 146c of the vertical flow plate 146. One or more inlet orifices are provided at or toward the second end of the outlet conduit 152, through which gas in the humidification chamber can enter the conduit 152 and exit the humidification chamber via the gas outlet 150. In this embodiment, the outlet conduit 152 is substantially rectangular, having a lower wall 152c, an upper wall 152d, and a left side wall 152e and a right side wall 152f extending along its length. In this embodiment, two main inlet orifices 154a and 154b are disposed at or toward the second end 152b of the inlet conduit in each of the sidewalls 152e and 152f, such that the inlet opens toward the front or rear end of the cover. In this embodiment, the inlet orifices 154a and 154b are substantially rectangular, but may also be circular or other shapes. Figure 7 and Figure 14As shown, vertical wall structures 155a, 155b extend upward from the lower wall 152c of the conduit in the region of each corresponding inlet orifice 154a, 154b. Wall structures 155a, 155b act as splash barriers and are configured to force the gas flow upward around the wall before entering the orifices 154a, 154b, rather than moving directly into the orifices from the water surface directly below them. This configuration reduces the likelihood of water being picked up or carried by the gas flow (especially at high flow rates) and entering the outlet conduit 152. It should be understood that the inlet conduit 152 does not necessarily have to extend all the way to contact the vertical flow plate 146, and may instead terminate at a position between the vertical flow plate 146 and the side wall 108 of the cover.

[0184] Cover inlet and outlet connectors

[0185] As described above, the gas inlet 140 and gas outlet 150 have associated conduits 142 and 152 to create a desired gas flow path within the humidification chamber to maximize humidification; however, it should be understood that these conduits are not necessary. In an alternative embodiment, without conduits extending into the humidification chamber, the gas inlet 140 and gas outlet 150 may simply be orifices in the sidewalls.

[0186] When the inlet conduit 142 and outlet conduit 152 are provided, it should be understood that they do not need to be centered on opposite sides of the chamber cover at a perpendicular angle to the respective outer peripheral wall. The conduits may be located at a corner of the cover and may enter the chamber at any desired angle. Furthermore, the conduits do not need to be straight conduits, and may not be straight conduits, and may include one or more bends or turns.

[0187] As will be understood, the gas inlet 140 and gas outlet 150 of the humidification chamber can be connected to the gas flow path of the respiratory device in various ways. It should be understood that, in both hermetic and non-hermetic configurations, the gas inlet 140 can be coupled or fluidly connected to the gas flow path exiting the blower via one or more conduits, connectors, and / or gaskets. Similarly, the gas outlet 150 can be coupled in any suitable manner (including connectors, conduits, and / or gaskets) in both hermetic and non-hermetic configurations to the gas flow path leading to the gas outlet of the respiratory device, which in turn connects to a patient interface, such as a flexible gas delivery conduit and a user interface, as previously discussed.

[0188] In this embodiment, as previously referenced Figure 2The chamber is contained within a sealable humidification compartment, which includes a gas inlet fluidly connected to a blower outlet and a gas outlet fluidly connected to a main gas outlet of the breathing apparatus, the gas outlet typically coupled to or connectable to a patient interface. In this embodiment, the gas inlet 140 of the chamber is not sealed to the inlet of the compartment, but is open to pressurized gas entering the sealed compartment. Alternatively, a sealed connection between the chamber inlet and the compartment can be used. In this embodiment, the gas outlet 150 of the chamber is preferably sealed to or coupled to the gas outlet of the humidification compartment via a gasket or other sealing connection configuration, or at least closely aligned with each other, to minimize gas bypassing the chamber and directly reaching the compartment outlet.

[0189] Hinges and clamps

[0190] As previously described, the lid 56 is hinged or connected to the bracket 52, allowing them to move between an open and a closed position. In the open position, the lid pivots away from the bracket to allow the bucket 54 to be removed from the bracket (or to allow water to be used to fill or clean the bucket while the lid is open). In the closed position, the lid pivots to engage with the bracket to seal and secure the bucket between the lid and the bracket. In this embodiment, the lid 56, as... Figure 3 The closed position or configuration shown here pivots about a hinge located at the rear end of the chamber between the open position or configuration shown here.

[0191] In this embodiment, one or more hinges are located at the rear end of the humidification chamber, and these hinges are configured to hinge the cover 56 to the bracket 52. (See reference...) Figure 8 In this embodiment, a single elongated movable hinge 160 extends between the cover 56 and the bracket 54 along a portion of the rear end of the humidification chamber. Specifically, the movable hinge 160 is a thin, flexible plastic hinge integrally formed and coupled between a portion of the upper edge 76e of the rear wall 76 of the bracket and a portion of the protrusion 105 at the rear end of the cover 56. However, it should be understood that two or more hinges may be provided between the cover and the bracket along the rear end of the humidification chamber, and these hinges are not necessarily integrally formed movable hinges, but may be separately formed and attached or fixed to the cover and the bracket.

[0192] To secure the humidification chamber in a closed configuration, one or more operable clamps or clamping mechanisms are provided, and these operable clamps or clamping mechanisms are operable between a latched or locked position for securing the humidification chamber in a closed position or between a position that allows the cover 56 to pivot away from the bracket into an open position or an open or unlocked position of the configuration.

[0193] refer to Figure 9 and Figure 12In this embodiment, a single operable clamp 170 is disposed or secured to the cover 56 and is resiliently movable between an engaged position and a disengaged position, wherein a complementary fastener 172 is disposed on the bracket 52. Specifically, the clamp 170 is disposed at a central position on the front wall 102 of the cover 56. (See reference...) Figure 12 In this embodiment, the operable clamp 170 is in the form of a torsion clamp that is movable relative to a complementary fastener 172 disposed on the bracket 52 between an engaged position and a disengaged position. The clamp 170 includes a user contact portion 174 and an engagement tab portion 176, the user contact portion being pressable by a user to move or pivot the clamp to a disengaged position, and the engagement tab portion including an engagement orifice 176a. In use, the fastener 172 is a protrusion or engagement structure projecting from the front wall 74 of the bracket and aligned with the clamp such that when the clamp is in the latched or locked position, the fastener engages in the engagement orifice 176a of the clamp 170, thereby securing the cover 56 to the bracket 52.

[0194] As shown, the clamp 170 is mounted to the cover 56 via torsion members 178a and 178b, which extend from each side of the clamp at a midpoint between the end of the engaging tab portion 176 and the user contact portion 174. The torsion members 178a and 178b are longitudinally aligned and define a pivot axis DD about which the clamp 170 can pivot or rotate relative to the cover 56 between a rest (engaged, latched) position and an open or disengaged position that allows the cover to be released from the bracket. As shown, the user contact portion 176 is located near the front wall 102 of the cover, while the engaging tab portion 176 extends downward below the protrusion 105 and the lower edge of the cover 56. The torsion members 178a and 178b each extend between corresponding support pillars 180a and 180b disposed on the front wall 102 and the sides of the clamp 170. In this embodiment, the torsion members 178a and 178b are substantially cylindrical (but may have different cross-sectional shapes along their length, such as squares, rectangles, or other shapes) and are configured to provide a small degree of twist or bending about their longitudinal axis, thereby enabling the clamp to pivot or rotate about the pivot axis DD. As shown, the clamp 170 is biased by the torsion members 178a and 178b to its rest position or toward its rest position.

[0195] In use, when the cover 56 moves from the open position to the closed position, the tip of the engaging tab 176 engages the cam surface 172a on the fastener 172, which causes the clamp to pivot outward in direction F away from the front wall 102 of Ud, as... Figure 12As shown. Once the cover 56 is fully engaged with the bracket 52, the fastener 172 engages fully with the engagement orifice 176a of the engagement tab portion 176, allowing the clamp to return and spring back to its rest position, thus securely latching the cover to the bracket without the user needing to operate the clamp to engage it with the orifice. To release the clamp mechanism to allow the humidification chamber to open, the user simply presses the user contact portion 174 to move it toward the front wall 102 of the cover in direction E, as shown. This causes the engagement tab to rotate again away from the front wall in direction F about the pivot axis DD, thereby disengaging the engagement orifice 176a from the complementary fastener 172, allowing the cover 56 to pivot completely away from the bracket 52 into the open configuration. Once the user releases the pressure on the user contact portion 174, the clamp returns to its rest position, ready to latch again when the humidification chamber is closed.

[0196] like Figure 12 As shown, the front wall 108 of the cover has two limiting protrusions 182 on the front wall of the chamber behind the user contact portion 174. These limiting protrusions are designed to prevent the user from excessively rotating or twisting the clamp to prevent damage to the clamp mechanism. Guide structures 184 are optionally provided on either side of the fastener 172 protruding from the front wall 74 of the bracket 52. In use, the guide structures 184 are displaced and spaced apart sufficiently so that, when in the engaged position, the engaging tab portion 176 of the clamp can be fitted between the guide structures 184.

[0197] In the illustrated embodiment, clamp 170 is mounted to the cover and fastener 172 is mounted to the bracket, but it should be understood that this can be reversed if necessary, so that clamp can be secured to the bracket and fastener can be secured to the cover.

[0198] It should be understood that various other alternative clamping arrangements or mechanisms can be used to secure the cover 56 to the bracket 52 of the humidification chamber. Depending on the need, two or more operable clamps or latches can be provided on one or more walls around the perimeter of the humidification chamber. Further examples of various clamping mechanisms will be explained with reference to the following alternative embodiments of the humidification chamber, and it should be understood that such clamping mechanisms are also employed in this first embodiment of the humidification chamber.

[0199] seal

[0200] refer to Figure 10In this embodiment, there is no flexible seal (e.g., silicone, rubber, or others) surrounding the outer periphery of the humidification chamber between the lid 56 and the water tank 54. The pressure generated by the clamping mechanism when the humidification chamber is closed is considered sufficient to reduce or minimize leakage of gas and / or water at the interface between the lid 56 and the water tank 54. Additionally, when the lid 54 is located within the humidification compartment of the breathing apparatus, further downward pressure can be applied to the lid. For example, the lid of the humidification compartment can be configured to press down or engage with the lid 56 of the humidification chamber, thereby applying a downward force to the lid 56 to achieve a more tightly sealed configuration. Because the chamber is located within a pressurized humidification compartment, the pressure difference between the outside and inside of the chamber is negligible or close to zero. This substantially neutral pressure difference results in a minimal tendency for air to flow into or out of the chamber via the interface or outer periphery between the lid and the water tank, and therefore, a seal is generally not required.

[0201] However, it should be understood that in alternative embodiments, one or more flexible seals may be provided around the outer periphery of the humidification chamber between the lid 56 and the water tank 54 to further minimize any possible gas and / or water leakage from the humidification chamber at the interface between the water tank and the lid. For example, the peripheral flexible seals may even be mounted to any one or both of the edge 92 of the water tank 54 or the lower edge 107 or protrusion 105 of the lid 56. (See reference...) Figure 36 The diagram illustrates a possible sealed chamber construction in which a peripheral recess or groove is provided on the underside of the protrusion 105 of the lid, surrounding the entire outer periphery of the chamber, and a seal (e.g., a silicone or rubber O-ring) is mounted or positioned within the groove for sealing engagement with the edge 92 of the bucket when the chamber is closed.

[0202] refer to Figures 27 to 34 Other possible sealing configurations may be achieved by providing a flexible closure (e.g., silicone or rubber or others) 850, which can be mounted on the cover 56 of the humidification chamber (see...). Figure 10 And one or both of the cover 56 and bracket 52 surrounding the humidification compartment are releasably sealed (see...). Figure 4 The flexible closure 850 can be configured to engage with the shape of the cover 56 of the humidification chamber to form a tighter seal and thereby reduce any residual moisture or gas that may otherwise accumulate around the cover 56 during use.

[0203] Alternative clamping mechanism

[0204] As described above, various alternative clamping mechanisms can be used to secure the cover 56 to the bracket 52 of the humidification chamber 50. These can be described as in International Patent Application WO2014 / 038968, the entire contents of which are incorporated herein by reference.

[0205] Alternative water level markers

[0206] It should be understood that various other water level indicators can be used to help users identify when they have filled the bucket to the maximum water level line, some of which are non-limiting examples of which can be described as in International Patent Application WO2014 / 038968, the entire contents of which are incorporated herein by reference.

[0207] Humidification chamber - with complete bracket

[0208] refer to Figures 21A to 21C The second embodiment of the humidification chamber 300 will be explained below. The humidification chamber 300 is substantially similar to the first embodiment. As shown, the cover 56 is substantially similar to the first embodiment, but it includes a different clamping mechanism 310 on the front wall. In this embodiment, the clamp 310 is a U-shaped member mounted to the front wall and has surrounding... Figure 21B The degree of curvature of the axis is indicated at point II. For example... Figure 21A As shown, the clamp 310 is securely engaged with the fastener structure 312. (Reference) Figure 21C The fastener configuration includes an elongated structure with a substantially triangular cross-section. Specifically, an angled front cam surface 314 extends downward and outward from the front wall, and a substantially horizontal engagement surface 316 returns to the front wall from the lower edge of the front cam surface 314. The U-shaped clamp 310 includes two vertical legs 318 that extend downward from the cover and are engaged by a transverse member 320. In use, when the cover is engaged with the bracket 352, the transverse member 320 engages with the cam surface 314 of the fastener configuration 312 until it is fully engaged with the engagement surface 316.

[0209] In other respects, the humidification chamber 300 of the second embodiment is substantially similar to that of the first embodiment and includes a plastic lid 56 hinged to a plastic bracket 352 that receives a metal water tank of the aforementioned type. The main difference of the humidification chamber 300 of the second embodiment is that the bracket is substantially continuous around the peripheral wall of the water tank, such that it substantially encloses and surrounds the entire peripheral wall surface of the water tank.

[0210] Humidification chamber - with molded heating plate

[0211] Overview

[0212] refer to Figures 22A to 22TThe humidification chamber 400 of the third embodiment will be described in more detail below. The overall shape of the humidification chamber 400 is similar to that of the foregoing embodiments, and similar features are indicated by similar reference numerals where applicable. It should be understood that the description of previous embodiments with respect to similar features (including variations or substitutions) also applies to this embodiment and will not be repeated. The following description focuses on the differences between the third embodiment and the foregoing embodiments.

[0213] The main difference in the humidification chamber 400 of the third embodiment is that it is a two-part chamber assembly, rather than a three-part chamber assembly as in the preceding embodiments. The phrases “two-part” and “three-part” are intended to indicate the number of main components of an assembly, regardless of whether they are integrally formed or otherwise connected, coupled, or assembled together. Specifically, the previous embodiments involved a three-part chamber assembly including: an upper part (lid - part one) hingedly connected to open and close relative to a lower part (bracket - part two), which releasably receives and holds a separate water tank (part three). In contrast, the humidification chamber 400 of this third embodiment is a two-part assembly including an upper part (part one) in the form of a lid 456, which is hinged to the lower part on one side, and the lower part in the form of a water tank 452 (part two), which includes a thermally conductive metal heating plate on its base surface.

[0214] In this embodiment, the lid 456 and the bucket 452 (excluding the metal heating plate) are formed from rigid plastic by injection molding, vacuum forming, or some other suitable manufacturing process in a manner similar to the formation of the lid and bracket in the previous embodiments. Typically, the lid 456, the bucket 452, and the hinged connection 160 between the lid and the bucket are integrally formed as a single object; however, in alternative embodiments, the lid and the bucket may be formed as separate components and subsequently hingedly connected via one or more separate hinged parts or assemblies. Depending on design requirements, the bucket and / or the lid may be substantially transparent or formed as opaque.

[0215] As in the aforementioned embodiments, the humidification chamber 400 can be in a closed position with, for example... Figures 22L to 22N The lid 456 can be operated or moved between the open position or configuration shown. In the closed position, the lid 456 is secured to the bucket 452 to form a closed chamber (e.g., as shown). Figure 22A and Figure 22B As shown), in the open position, the lid 456 shifts or rotates about the hinge 160 away from the water tank to open the chamber for access. As previously described, one or more operable clamps 290 or latches are provided at the front end of the humidification chamber to secure or lock the humidification chamber in a closed position in preparation for insertion and operation within the breathing apparatus.

[0216] bucket

[0217] refer to Figure 22A , Figure 22B , Figure 22L and Figure 22M The water tank 452 includes a base surface 470, from which upright sidewalls extend around the periphery of the base surface. As shown, the water tank includes a front wall 474 and a rear wall 476 located at the front and rear ends of the humidification chamber, respectively, and a first sidewall 475 and a second sidewall 477 extending along the gas inlet and gas outlet sides of the humidification chamber, respectively.

[0218] refer to Figure 22D , Figure 22E and Figure 22F One or more of these walls, or a portion thereof, may be provided with reinforcing profiles configured to resist bending or deformation of the wall surface. In this example embodiment, each of the sidewalls 475, 477 is provided with reinforcing portions or regions 478, 479, which respectively comprise a corrugated or wavy surface profile of alternating grooves and ridges. In this embodiment, the grooves and ridges are vertically oriented, but it should be understood that a horizontal orientation may be used in an alternative if desired. In this embodiment, the thickness of the sidewalls in the reinforcing or corrugated regions is substantially uniform, such that the ridges and grooves, and the transition regions between them, have substantially similar wall thicknesses, such as... Figure 22D As shown. In an alternative embodiment, the thickness of the sidewalls in the reinforced region can be inconsistent. In this embodiment, the height of each corrugated region extends from the base surface to the midpoint below the edge or rim of the bucket on the sidewall, as shown. Figure 22E and Figure 22F As shown, but it should be understood that the corrugated area may begin at a point above the base surface, or alternatively, if desired, the corrugated area may extend the entire height of the sidewall. In alternative reinforcing profiles, spaced-apart reinforcing ridges or ribs (whether vertically or horizontally oriented) may be provided on one or more portions of the sidewall, on the inner or outer surface, or both. In this embodiment, these ridges or ribs increase the wall thickness in the region of the ridge or rib. In other alternative embodiments, the sidewall of the bucket 452 may be reinforced or strengthened to prevent or minimize bending and / or deformation of peripheral protrusions, lips, or edges extending or projecting outward from or at the top peripheral edge of the bucket sidewall. For example, the edge may be Figure 26 The type or form shown at 92 or 52a refers to the integral formation around the upper outer peripheral edge of the sidewall. The reinforcing edge may be provided in conjunction with the reinforcing region of the sidewall, or as an alternative, in place of the reinforcing region.

[0219] refer to Figures 22E to 22HThe side front view in this embodiment shows that the humidification chamber 400 includes a convex or dome-shaped base surface 470 that curves or rounds outward toward a apex defined by the central heating plate, as will be discussed further below. In an alternative embodiment, the base surface 470 may be substantially flat.

[0220] refer to Figure 22D , Figure 22L and Figure 22M The base surface 470 of the bucket 452 is provided with a centrally positioned metal or thermally conductive heating plate 494. In this embodiment, the heating plate 494 is circular and is joined or secured by overmolding to a complementary circular aperture located at the center of the base surface 470 of the plastic bucket 452. The heating plate may be formed of a rigid and thermally conductive material and is typically pressed or formed from a sheet of metal such as aluminum, stainless steel, or any other suitable material, or may be formed, for example, by die casting. In this embodiment, the heating plate 494 and the complementary aperture in the base surface 470 of the bucket are circular, but it should be understood that this shape can be changed to provide an integrated heating plate surface of any other alternative shape, including square, rectangular, or any arbitrary shape. In this embodiment, the heating plate 494 is substantially flat before the overmolding process, but may have a slightly outward domed or raised profile after the overmolding process caused by compressive forces from the surrounding domed base surface. The compressive force or bias that causes the heating plate to bulge slightly outward on the mating surface reduces or resists the possibility of the heating plate deforming inward over time and with use, because the deformed inwardly recessed mating surface will reduce the contact surface area between the heating plate and the heating pad located on the humidification compartment, thereby reducing the heat transfer efficiency of the configuration.

[0221] In this embodiment, the heating plate 494 is provided with a primary circular contact surface 495, which is configured to protrude or extend beyond the surrounding plastic base surface 470 of the water tank 452 to facilitate full engagement and heat transfer when the chamber is located on a complementary-shaped heating pad at the bottom of the humidification compartment. In this embodiment, the heating plate also includes an upright or substantially vertical wall portion 496 extending around the periphery of the primary contact surface portion 495, and an external substantially horizontal peripheral connecting surface or protrusion portion 497 extending outward from the top of the wall portion 496 around the outer periphery of the heating plate. As shown, the primary contact surface portion 495 and the external connecting protrusion 497 extend in substantially parallel planes but are displaced perpendicularly from each other by the height of the vertical wall portion 496. As shown, the connecting protrusion 497 of the heating plate 494 is coupled or secured to the surrounding plastic around the periphery of the central opening of the base surface 470 by overmolding. Specifically, the engagement portion 471 of the base surface material surrounding the central opening of the base surface 470 is molded around the entire periphery of at least a portion of the connecting protrusion 497 of the heating plate 494.

[0222] refer to Figure 22J In this embodiment, the overmolding process is configured to alter the thickness of the engagement portion 471 on the base surface relative to the remainder of the base surface. In this embodiment, the total thickness 401 of the engagement portion 471 molded on at least a portion of the connecting protrusion 497 of the heating plate 494 is greater than the thickness 402 of the remaining base surface 470 of the bucket. This configuration helps reduce the amount of hard water deposits entering at the transition interface region between the metal heating plate and the plastic base surface after molding, thereby reducing the amount of plastic lifting of the base surface 470 away from the connecting protrusion 497 of the heating plate. In one arrangement, the thickness 403 of the upper portion of the engagement portion 471 above the connecting protrusion 497 of the heating plate 494 is similar to or at least as thick as the thickness 402 of the remaining base surface to reduce or minimize the lifting of the upper portion away from the connecting protrusion 497. As shown in the figure, in this embodiment, the thickness 404 of the lower portion of the engagement portion 471 below the connecting protrusion 497 can be smaller than the thickness 403 of the upper portion of the engagement portion 471 on the base surface 470. In an alternative embodiment, the thickness 404 of the lower portion of the engagement surface can also be similar to or at least as thick as the thickness 402 of the remaining base surface in order to reduce or minimize the lift of the lower portion from the connecting protrusion.

[0223] It should be understood that, in alternative embodiments, the heating plate may be a substantially flat circular plate that is fixed in the central opening of the base surface by overmolding, such that it is substantially flush with the rest of the base surface, rather than protruding as described above.

[0224] refer to Figure 22L In this embodiment, the bucket 452 also has a continuous horizontal stepped structure 472 extending around the outer periphery of the inner sidewall surface. The stepped structure is displaced by a uniform height from the base surface of the bucket around the inner periphery. The stepped structure is integrally formed in the sidewall and can be in the form of angled steps, such as... Figure 22I As shown. In this configuration, the stepped structure 472 is located at a certain height from the base surface corresponding to the maximum fill line. When the chamber lid is in the open position, as an alternative to using the water filling hole, the user can fill the bucket with water up to the level of the stepped structure.

[0225] Humidifier chamber lid

[0226] The cover 456 of the humidification chamber 400 in the third embodiment is substantially similar to the cover 56 of the aforementioned embodiments, but there are some major differences, which will be explained below. It should also be understood that the humidification chamber of the third embodiment may also use the same cover 56 as described above.

[0227] refer to Figure 22C , Figure 22I and Figure 22L In this embodiment, the cover 456 is provided with a previously referenced Figure 18A and Figure 24B The type of convex water level indicator 220 is explained. Specifically, the convex water level indicator 220 includes angled protrusions 134, which are suspended below each water-filled orifice 120 by upright support members 132, 221 at each end. In this embodiment, as Figure 22L As shown, the maximum quantity marking "MAX" is printed rearward on the lower surface of the tab portion 134. At least the tab portion 134 is formed of transparent plastic so that the marking "MAX" is presented to the user in the correct readable format when viewed through the water-filled hole 120.

[0228] refer to Figure 22E and Figure 22C The outer peripheral wall 106 on the inlet side of the cover 456 is provided with one or more protrusions 407, such as ridges or ridges, extending from the surface of the outer peripheral wall. In this embodiment, the protrusions 407 are provided on each side of the central inlet orifice 140 of the cover for engagement with alignment tracks provided on the inner inlet gas sidewall of the humidification compartment, which will now be explained in detail. (See reference...) Figure 22O The lower portion of the humidification compartment 800 is shown, its shape and dimensions designed to have a complementary cavity 802 that receives and holds the humidification chamber 400. The lower portion of the humidification compartment can be part of the housing or body of a breathing device of the aforementioned type. (See previous references.) Figure 2 The humidification compartment may also include an openable lid for sealing or closing the compartment once the humidification chamber 400 is installed in the cavity. As shown, two vertical guide rails 406 protrude from the inner wall surface of the humidification compartment on each side of the gas inlet 804, which receives the gas flow from the blower of the breathing device, as previously referenced. Figure 2 As described above. In this embodiment, each track 806 extends from a first upper end at or toward the height of the gas inlet 804 and a second lower end at or toward the bottom surface of the compartment. In this embodiment, reference... Figure 22O and Figure 22T Each track includes a first short initial ramp portion 806a that tapers or slopes outward from the wall surface and then extends back into a second longer return ramp portion 806b that tapers or slopes inward toward the inner wall surface. In operation, protrusions 407 on the gas inlet side of the humidification chamber 400 align with engaging tracks 806 on the inlet side of the humidification compartment. As the humidification chamber 400 descends or is inserted downward into the humidification compartment, the protrusions 407 abut or engage with their respective tracks 806, and the tracks push the chamber 400 against the opposing outlet sidewall of the compartment, including the gas outlet 808, as... Figure 22P As shown. Once the chamber is inserted or fitted with a foil, this configuration helps to push and hold the gas outlet 150 of the chamber to seal and engage with or connect to the gas outlet 808 of the compartment. In this configuration, the gas outlet 808 of the compartment is provided with a seal 810 that extends around the outer periphery of the gas outlet 808. For example, the seal may be an elastomer or rubber component or insert. As will be explained below, in this embodiment, the gas outlet 150 of the chamber is provided with an engagement surface 430 that sealably engages with the seal 810 around the outer periphery of the gas outlet 808 to thereby form a sealed connection between the outlets. In alternative embodiments, it should be understood that the seal may be provided on the gas outlet 150 of the chamber, or the outlets of the chamber and the compartment may have complementary seals.

[0229] refer to Figure 22F , Figure 22K as well as Figures 22P to 22S In the humidification chamber 400 of the third embodiment, the gas outlet 150 on the outlet-side outer peripheral wall 108 of the cover 456 includes a mating surface or configuration 430 surrounding the outer periphery of the orifice 150. The mating surface 430 is configured to sealably engage with the seal 810 of the gas outlet 808 of the humidification compartment 800 when the humidification chamber 400 is installed in the compartment. In this embodiment, the gas outlet 150 is substantially rectangular, and therefore the mating surface 430 is also substantially rectangular, and includes an upper horizontal portion 431 and a lower horizontal portion 432 extending along the upper and lower outer peripheries of the gas outlet 150, and side vertical portions 433, 434 along the side outer periphery portions of the gas outlet 150. In this embodiment, the mating surface 430 is substantially planar around the outer periphery or periphery of the gas outlet 150, such that it can sealably engage with the complementary seal 810 or the outlet surface associated with the gas outlet 808 of the humidification compartment 800. In the illustrated arrangement, the mating surface 430 is preferably angled or inclined outward relative to the outer peripheral wall 108 on the vertical exit side. Specifically, as Figure 22K As shown more clearly, the mating surface 430 is angled such that the upper portion 431 is displaced outward from the outlet-side outer peripheral wall 108 more than the lower portion 432. In this arrangement, the mating surface 430 can be considered as tilted or pivoted outward about a horizontal axis extending across its surface, such that the upper portion of the mating surface protrudes or is displaced further from the outlet-side outer peripheral wall 108 of the cover 456 than the lower portion or region 432 of the mating surface. It should be understood that the same principle can be applied if the gas outlet and the mating surface are circular or other shapes. The angled mating surface 430 facilitates easy reception or insertion of the humidification chamber into the complementary humidification compartment 800 and facilitates the formation of a sealing engagement or connection between the gas outlet 150 of the chamber and the gas outlet 808 of the humidification compartment 800.

[0230] refer to Figure 22L The vertical flow plate 146 of the cover 456 is modified compared to the previous embodiment. In this embodiment, the vertical plate or plane 146 additionally includes a pair of baffle portions or blades 435 that extend along the side edges 146 of the flow plate 146 along its entire height (H) and serve as guides or deflectors. The side baffles 435 protrude or extend along each of their side edges away from a first side surface 146b of the flow plate 146. Specifically, the side baffles 435 extend substantially perpendicular to the flow plane 146 such that they extend toward the inlet side of the cover. In this arrangement, the side baffles 435 of the vertical flow plate 146 have a width W2 (extending in a direction perpendicular to the surface of the flow plate), which is substantially smaller than the total width W of the vertical flow plate. In use, the side baffle portions or surfaces 435 are configured to minimize or prevent airflow leaving the inlet duct 142 from flowing directly around the side edge 146e of the vertical flow plate toward the gas outlet duct 152, a flow path that results in reduced humidification. The side baffle 435 forces or prompts air to circulate back towards the inlet side of the humidification chamber and extends the general airflow circulation path within the chamber before the gas leaves the chamber in order to enhance moisture absorption. As previously mentioned, the height (H) of the flow plate 146 is generally configured such that it protrudes deeply enough to penetrate into the water surface to prevent gas leaving the inlet duct 142 from being cut off below the lower edge 146a and directly reaching the outlet duct 152.

[0231] Hinges and clamps

[0232] As previously described, the upper portion or lid 456 is hingedly coupled or connected to the lower portion or bucket 452 such that they are movable between an open position and a closed position. In the open position, the lid pivots away from the bucket (to allow water to be used to fill or clean the bucket with the lid open), and in the closed position, the lid pivots to engage with the bracket to close the chamber. In this embodiment, the lid 456 is hingedly coupled to the bucket 452 in a manner similar to the hinged connection between the lid and the bracket in the aforementioned embodiments. Specifically, for example, the lid 456 may be hinged around a hinge located at the rear of the chamber. Figure 22A and Figure 22B The shown closing position or configuration is similar to... Figures 22L to 22N Pivot between the shown open positions or configurations. For example... Figure 22A , Figure 22G and Figure 22M As shown, in this embodiment, the hinge is a single elongated movable hinge 160 that extends along a portion of the rear end of the humidification chamber between the cover 456 and the water tank 452, and has the form described earlier in the previous embodiments.

[0233] To secure the humidifying chamber in a closed configuration, one or more operable clamps or clamping mechanisms are provided, operable between a latched or locked position for securing the chamber in a closed position, or between a position that allows the lid 456 to pivot away from the water tank to an open position, or between an open or unlocked position of the configuration. (Reference) Figure 22B , Figure 22H , Figure 22M and Figure 22N In this embodiment, the humidification chamber includes a single operable clamp 290 and a reference clamp. Figure 17A and Figure 17B The complementary fastener configuration 192 of this type. Specifically, the clamp 290 is pivotally mounted to the cover and movable to engage with the fastener 192 to securely close the chamber, or to detach from or release from the fastener 192 to allow the chamber to be opened. Figure 22H As shown, the recessed portion 195 is located on the front wall of the bucket 452 near the clamp 290, so that the user can grip and pull the tab to disengage the clamp from the fastener structure 192 when needed.

[0234] seal

[0235] As in the previous embodiments, the chamber 400 of the third embodiment does not necessarily need to be sealed between the lid 456 and the bucket 452. However, if necessary, it can be sealed as shown in this embodiment. (See reference...) Figure 22I The protrusion 105 of the cover 456 is provided with or forms an outer peripheral groove or recess, and the seal 99 is mounted in the groove around the outer periphery of the cover, the configuration being similar to the reference. Figure 26 The configuration described in the embodiment. As shown, when the chamber is closed to seal it, the seal 99 engages with the upper surface or edge 461 of the outer peripheral wall of the bucket 452. Reference Figure 26 Other sealing configurations discussed can also be used in alternative configurations.

[0236] Humidification chamber - with sleeve

[0237] refer to Figure 23A and Figure 23BThe humidification chamber 500 of the fourth embodiment is a variation of the humidification chamber 300 of the second embodiment. In this embodiment, one end of the lid 56 is not hinged to the complete bracket, but is connected to a sleeve 552 in the form of a continuous outer peripheral wall, which surrounds or extends around or extends the entire peripheral wall of the bucket 54, as shown. Specifically, the sleeve 552 exposes the entire base surface 54 of the bucket. The sleeve 552 is preferably formed of the same material as the lid, for example, injection molded from plastic or a similar material. The height of the sleeve, as indicated at 554, can be varied as needed. In this embodiment, the sleeve extends substantially from the upper edge of the edge of the bucket to the base surface of the bucket, but in alternative embodiments it can be thinner and extend only partially along the peripheral wall from the upper edge. Figure 23B As shown, a lip or edge 92 extending outward from the upper edge of the water tank 54 prevents the sleeve from rising or slipping out of the water tank 54. Additionally, the humidification chamber is substantially similar to the previous embodiment and is provided with a movable hinge along the rear end (not shown) to connect the cover to the sleeve 52, and a clamping mechanism 560 at the front, in this embodiment, the clamping mechanism being about... Figures 16A to 16B The form of the description.

[0238] Humidification chamber - with internal clamps

[0239] refer to Figures 24A to 24C The humidification chamber 600 of the fifth embodiment (see Figure 24C This includes a plastic lid 602, which is releasably attached to a metal bucket 604 via an internal clamp (see [link]). Figure 24C The plastic cap 602 is substantially similar to the cap of the aforementioned embodiment, but includes a slightly different water level indicator configuration. Specifically, there is a water filling hole 606 centrally located towards one end of the cap and a tapered water level indicator 608 located at a corner towards the opposite end of the cap. Furthermore, a finger-like grip recess 610 is centrally located on the water level indicator end of the cap. The internal structure of the cap 602 is similar in other respects, including a gas inlet, a gas outlet, and a vertical flow plane configuration.

[0240] The bucket 604 is made entirely of a metal such as stainless steel, aluminum, or the like. Optionally, for example, a sleeve or bracket of insulating material such as plastic or other heat-insulating material may be provided on the outer peripheral wall and / or lower surface of the metal bucket to prevent the user from burning their hands when picking up the metal bucket, but the user can pick up the metal bucket by grasping the water filling hole 606 and the finger grip recess 610 through the lid with their fingers and thumb.

[0241] The lid 602 is not hinged to the bucket 604, but can be completely detached from the bucket. Each end of the lid is provided with a clamp or engaging protrusion 612 (visible only at one end), which is configured to engage at or toward the upper edge of the bucket in a complementary recess 614 located at each end of the bucket 604. Assembling the lid 602 to the bucket 604 requires the user to press the lid until the clamp 612 engages in the complementary recess 614. To release the lid, the user pulls it vertically from the bucket with sufficient force to disengage the clamp 612 from the recess 614.

[0242] Humidification chamber - with tubing cap

[0243] refer to Figures 25A to 26 The humidification chamber 700 of the sixth embodiment will be described. This embodiment includes a plastic lid 702 that is clipped into a complementary-shaped metal bucket 704 in a manner similar to that described above with reference to the humidification chamber 600 of the fifth embodiment. Figure 25A The inlet port 706 of the humidification chamber is shown, and Figure 25B The gas outlet 708 of the humidification chamber is shown.

[0244] Humidification chamber and sealing components

[0245] refer to Figures 27 to 37 The sealing closure 850 is configured to be mounted on the humidification chambers 24, 50, 300, 400, 500, 600 or 700 and / or the humidification compartment 22 of the breathing device 20, wherein the humidification chambers are referenced as in the previous embodiments. Figures 1 to 26 The location is described.

[0246] Directly mounting the sealing closure 850 onto the humidification chamber offers one or more advantages over prior art arrangements. For example, the sealing closure is not permanently attached to any component and can be relatively easily removed for cleaning or replacement. As will be described in more detail below, the sealing closure 850 is installed relatively simply, quickly, and easily onto the humidification chamber by simply pushing it onto the chamber. In some instances, the sealing closure 850 is installed onto the chamber simply by pushing a portion of the sealing closure into the filling orifice of the chamber. Furthermore, the sealing closure 850 can provide some insulation by reducing heat loss from the humidification chamber through the material of the sealing closure 850 and / or any one or more cavitations present between the underside of the sealing closure 850 and the humidification chamber.

[0247] The sealing closure 850 is configured to be releasably mounted adjacent to the water tank on the humidification chamber. The sealing closure 850 is configured to seal the orifice 120 when mounted on and sealingly engaged with the humidification chamber. This seal of the orifice 120 can be achieved by the sealing closure 850 sealing the top and periphery of the water tank and / or humidification chamber, and / or by the sealing closure 850 directly sealingly engaging the area defining and / or adjacent to the orifice 120. It may be desirable for the sealing closure to provide double or multiple seals.

[0248] In this example, the sealing closure:

[0249] When viewed in a plan view, it is basically a rounded rectangle;

[0250] When viewed from the side, it is essentially flat and includes a top surface and a bottom surface;

[0251] Formed from an elastically deformable material;

[0252] It adopts a one-piece construction;

[0253] Configured to be releasably mounted on the humidification chamber; and

[0254] Includes at least one sealing structure that protrudes from the lower surface and is configured to seal and close the filling orifice to prevent gas and / or vapor from escaping from the one or more filling orifices.

[0255] In this example, the sealing closure 850 is configured such that the shape, cross-sectional profile, size, and features of the lower surface 851 of the sealing closure 850 are complementary to the shape, cross-sectional profile, size, and features of the uppermost surface of the humidification chamber on which the sealing closure 850 is mounted.

[0256] exist Figures 27 to 37 In one example, the sealing closure 850 includes a pair of sealing configurations, each configured to sealably engage one of the filling orifices 120, the sealing engagement sealingly closing each filling orifice 120.

[0257] In one embodiment, each sealing configuration includes a plug 852 that protrudes downward from the lower surface 851 of the sealing closure 850 and at least partially fits within the filling orifice 120. When viewed from the top and side, each plug 852 has a diameter, cross-sectional profile, and shape that complements and matches the diameter, cross-sectional profile, and shape of each filling orifice 120 when viewed from the top and side. Therefore, when the sealing closure 850 is mounted on the humidification chamber, the exterior of each plug 852 at least engages the neck surface of the corresponding filling orifice 120 and seals the filling orifice 120 so that vapor and / or liquid in the water tank cannot escape through the filling orifice 120.

[0258] The plug 852 may also be provided with internal and / or external mounting features, in this example including gripping protrusions or ribs 853 that frictionally engage the surface of the filling orifice 120 to maintain the sealing plug 852 retained in the filling orifice 120.

[0259] In the illustrated embodiment, each stopper 852 may also be provided with a pair of opposing elongated slots 854 formed in the outer surface of each stopper 852, the outer surface being the surface that sealably engages with the surface of the filling orifice 120. Each slot 854 is recessed from the remainder of the sealing surface of the corresponding stopper 852. The slots 854 are present to facilitate the manufacture of the sealing closure 850, and particularly molding. When under molding pressure during manufacturing, the silicone or rubber material may not completely fill the stopper portion. The slots 854 form a path with relatively high flow resistance, which causes the silicone / rubber to flow along a path of lower resistance, i.e., through the bottom of the stopper 852. Depending on the manufacturing process involved, the slots 854 may be unnecessary and may be omitted.

[0260] Midway between the opposite ends of the sealing closure 850 and located between the plugs 852, the central region 857 of the sealing closure 850 is shaped, sized, and profiled to match the shape, size, and profile of the central region of the upper surface of the humidification chamber 50 above the inlet conduit 62 and outlet conduit 64. Due to the manufacturing processes used to manufacture the conduits 62, 64, the region of the chamber 50 above the conduits 62, 64 has a relatively complex shape and profile. When viewed from the side and / or end, at least some of this region of the chamber 50 is recessed from the remainder of the upper surface of the chamber 50 and defines various cavities and protrusions. The lower surface of the sealing closure 850 is arranged to match and engage with this region of the chamber 50, including in the region above the conduits 62, 64, such that the lower surface of the sealing closure 850 contacts and seals this region of the chamber 50 as closely as possible. This helps ensure that wet vapor is not trapped between the sealing closure 850 and the chamber 50, and helps prevent condensation from forming between the sealing closure 850 and the chamber 50. This portion of the sealing closure 850 is also provided with a plurality of parallel channels 858 extending from one edge across the sealing closure to the other edge. These channels 858 can help allow one half of the sealing closure to pivot relative to the other half around the channels 858, which serve as relatively weak areas. This allows only one plug 852 to emerge from one fill orifice 120, while the other plug 852 remains in the other fill orifice 120.

[0261] The sealing closure 850 also includes a peripheral seal 859 extending around the periphery of the sealing closure 850. The peripheral seal 859 sealably engages with the periphery of the humidification chamber 50 and, in use, can also sealably engage with the periphery and / or sidewalls of the humidification compartment 22 of the breathing apparatus 20, in which the humidification chamber is received. By sealing around the periphery of the humidification chamber 50, the peripheral seal 859 can therefore serve as an additional, auxiliary, or backup seal for the filling orifice 120. By sealing around the periphery of the humidification compartment 22 of the breathing apparatus 20, the peripheral seal 859 can serve as a seal between the humidification compartment 22 and the humidification chamber 50, thereby preventing the escape of any gas or vapor from the humidification compartment 22.

[0262] Further reference Figure 36 and Figure 37 An enlarged view. The peripheral seal 859 includes a raised flange 861 that projects upward and radially outward from the upper surface of the sealing closure 850. When the humidification chamber 50 is installed therein, this flange 861 can engage and provide a seal to a cover or closure that can be configured to close the humidification compartment 22.

[0263] Adjacent to the raised flange 861 is a recessed groove 863 that extends around the periphery of the sealing closure 850 adjacent to the flange 861.

[0264] The peripheral seal 859 also includes a downwardly pointing skirt 865 that hangs downward from the flange 861. The cross-sectional profile of the downwardly pointing skirt 865 is arcuate, such that the lower portion of the skirt 865 curves downward and radially inward. The curve of the skirt 865 defines a channel 867 that extends around the periphery of the seal and receives the edge and / or sidewall of the humidification compartment 22 of the breathing device 20.

[0265] The sealing closure 850 also includes a downwardly pointing wall 869 that is radially spaced inward from the periphery of the sealing closure 850 and extends around the sealing closure 850. The wall 869 has a corresponding cutout 871 in the central region of the sealing closure, such that when the sealing closure 850 is mounted on the humidification chamber 50, the wall 869 avoids obstructing the inlet conduit 62 and outlet conduit 64. The wall 869 contacts and seals against the upper portion of the humidification chamber 50 to provide additional sealing functionality, and also serves to guide the sealing closure 850 onto the humidification chamber 50 during assembly, providing positioning and retention.

[0266] A hand- or finger-like gripping tab 873 may be provided to assist the user in releasing the sealing closure 850 from the humidification chamber 50 by pulling the tab 873 vertically from the humidification chamber 50. The tab 873 may be provided with an opening 874 for suspending or otherwise storing the sealing closure 850.

[0267] In this example, when viewed in a plan view, the sealing closure 850 is a rounded rectangle with rounded corners. One corner has a significantly larger radius than the other three corners, and the gripping tab 873 extends from this corner with the larger radius. The sealing closure 850 can be any other shape required to correspond to the shape of the humidification chamber 50 and / or the shape of the humidification compartment 22.

[0268] The sealing closure 850 is an integral structure of a flat sheet, a single component having the aforementioned features formed within the sheet. The sealing closure 850 is elastically deformable and flexible, and can be made of any suitable material, such as rubber and / or silicone. The material and size of the sealing features can be selected such that the sealing closure 850 engages with the humidification chamber and deforms sufficiently to form a sealing engagement with the humidification chamber and / or humidification compartment 22 when needed. For example, plugs 852 can elastically deform when they are pushed into the filling orifices 120 to seal against these orifices.

[0269] Sealing closures according to one or more of the above-disclosed aspects can provide one or more advantages over prior art arrangements. For example, sealing closures can help reduce or prevent overflow from the humidification chamber during filling and / or delivery of the humidification chamber. For example, using hinged sealing closures can help reduce condensation dripping from the closure into the chamber at the end of treatment.

[0270] Unless the context explicitly requires it, throughout the description, the words “comprise”, “comprising”, etc., are interpreted as encompassing rather than exclusive or exhaustive; that is, they are interpreted as “including but not limited to”.

[0271] While this disclosure has been described by way of example and with reference to possible embodiments thereof, it should be understood that modifications or improvements may be made to the invention without departing from the scope of this disclosure. This disclosure may also be broadly defined as any or all combinations of components, elements, and features individually or collectively mentioned or indicated in the specification of this application, and of two or more of said components, elements, or features. Furthermore, where reference is made to a specific component or whole of the invention having known equivalents, such equivalents are incorporated herein as if described separately.

[0272] Any comments regarding the prior art should not be regarded as an admission or confirmation that the prior art constitutes part of common general knowledge in the field.

Claims

1. A humidifying chamber for humidifying gas, the humidifying chamber comprising: A bucket, configured to receive a certain volume of water; A gas inlet for receiving a gas flow into the internal volume of the humidification chamber; The gas outlet allows the humidified gas flow to exit the internal volume of the humidification chamber. One or more filling orifices, which are in fluid communication with the bucket, so that the bucket can be filled with water through the one or more filling orifices; as well as A sealing closure is configured to be releasably mounted on the humidification chamber, and the sealing closure is configured to seal each filling orifice when mounted on the humidification chamber to prevent gas and / or vapor from escaping from the one or more filling orifices. The sealing element includes one or more sealing structures configured to sealably engage a region of the humidification chamber defined or adjacent to the one or more filling orifices, thereby closing the one or more filling orifices. Each sealing structure includes a plug suspended from the sealing closure, which, when the sealing closure is installed on the humidification chamber, is received in a corresponding filling orifice. The sealing closure also includes a peripheral seal extending around the periphery of the sealing closure, the peripheral seal being configured to seal against one or both of the following: The edge of the humidification chamber; and / or Breathing equipment using this humidification chamber.

2. The humidification chamber according to claim 1, wherein, The sealing element includes a mounting structure configured to engage the humidification chamber to mount the sealing element into the humidification chamber, such that the sealing structure maintains a sealed engagement with the humidification chamber.

3. The humidification chamber according to claim 2, wherein, The mounting structure includes at least one rib that protrudes outward from the sealing structure.

4. The humidification chamber according to any one of claims 1 to 3, wherein, At least a portion of the sealing element is elastically deformable.

5. The humidification chamber according to any one of claims 1 to 3, wherein, The sealing closure includes a hand-like or finger-like gripping structure configured to be gripped to remove the sealing closure from the humidification chamber.

6. The humidification chamber according to any one of claims 1 to 3, wherein, The sealing closure also includes at least one hinge or hinge region that extends at least partially across the sealing closure and is configured such that one end region of the sealing closure can be hinged relative to an opposite end region.

7. The humidification chamber according to claim 6, wherein, The hinge area includes a narrow channel.

8. The humidification chamber according to claim 7, wherein, The hinge area includes multiple parallel channels that extend across the sealing closure from one edge to the other opposite edge.

9. The humidification chamber according to any one of claims 1 to 3, wherein, The bucket is made of rigid plastic and includes a base surface and an outer peripheral wall extending upward from the base surface, wherein the base surface includes a heating plate.

10. The humidification chamber according to any one of claims 1 to 3, the humidification chamber further comprising a lid hingedly connected to the water tank for closing the water tank to define the internal volume of the humidification chamber, and the lid being movable between a closed position in which the water tank is closed by the lid and an open position in which the water tank is open.

11. The humidification chamber of claim 10, further comprising one or more operable clamps for securing the cover in the closed position; the sealing closure is configured to be releasably mounted on the cover.

12. The humidification chamber according to claim 10, wherein, The lid and the bucket are hinged together by a movable hinge and are formed as a single item.

13. The humidification chamber according to claim 11, wherein, The lid and the bucket are hinged together by a movable hinge and are formed as a single item.

14. A sealing closure for sealingly closing at least one filling orifice of a humidification chamber used for humidifying gas, the sealing closure comprising one or more sealing features projecting from a lower surface and configured to seally close the at least one filling orifice to prevent gas and / or vapor from escaping from the at least one filling orifice. in, The sealing structure, or each sealing structure, includes a plug suspended from the sealing closure, each plug being received in a corresponding filling orifice when the sealing closure is installed on the humidification chamber; The sealing member further includes a peripheral seal extending around its periphery, the peripheral seal being configured to seal against one or both of the following: The edge of the humidification chamber; and / or Breathing equipment using this humidification chamber.

15. The sealing closure according to claim 14, wherein the sealing closure: When viewed in a plan view, it is basically rectangular; When viewed from the side, it is essentially flat and includes a top surface and a bottom surface; Formed from an elastically deformable material; It adopts a one-piece construction; and It is configured to be releasably mounted on the humidification chamber.

16. The sealing closure according to claim 14 or 15, wherein, The sealing closure also includes at least one hinge or hinge region that extends at least partially across the sealing closure and is configured such that one end region of the sealing closure can be hinged relative to an opposite end region.

17. The sealing closure according to claim 16, wherein, The one end region and the opposite end region are each located on the corresponding opposite side of the at least one hinge and each has a corresponding sealing structure configured to sealably engage a corresponding one of the at least one filling orifices, and the corresponding sealing structure sealably closes each filling orifice.

18. The sealing closure according to claim 17, wherein, The sealing structure in the one end region and the opposite end region is in the form of a plug, which at least partially fits into the corresponding filling orifice of the humidification chamber.

19. The sealing closure according to claim 17, wherein, As one end region pivots about the at least one hinge, the sealing structure of the opposite end region remains in the corresponding filling orifice.

20. The sealing closure according to claim 18, wherein, A pair of opposing elongated slots are formed in the outer surface of each plug, the outer surface being a surface that sealably engages with the corresponding surface of the filling orifice.

21. The sealing closure according to claim 14 or 15, wherein, The sealing closure includes a hand-like or finger-like gripping structure configured to be gripped to remove the sealing closure from the humidification chamber.

22. The sealing closure according to claim 16, wherein, The hinge area includes a narrow channel.

23. The sealing member according to claim 22, wherein, The hinge area includes multiple parallel channels that extend across the sealing closure from one edge to the other opposite edge.

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