Cabinet for insertion into a humidifier chamber and humidifier

Abstract

The present disclosure relates to a tank for insertion into a humidifier chamber and a humidifier. A tank for insertion into a humidifier chamber, comprising: a tank base configured to hold a supply of water; a tank lid; a flow plate; and a seal connected to the flow plate, wherein the flow plate is located between the tank base and the tank lid via the engagement of the seal with the side wall edge of the tank base and the side wall edge of the tank lid.

Description

[0001] This application is a divisional application of Chinese patent application No. 201811325770.8, filed on September 17, 2009, entitled "Humidification of Breathable Gas". Application No. 201811325770.8 is a divisional application of Chinese patent application No. 201610248130.6, filed on September 17, 2009, entitled "Humidification of Breathable Gas". And application No. 201610248130.6 is a divisional application of Chinese patent application No. 200980136567.9 (international application No. PCT / AU2009 / 001232), filed on September 17, 2009, entitled "Humidification of Breathable Gas".

[0002] Cross-references to this application

[0003] This application claims priority to U.S. Application No. 61 / 097,765, filed September 17, 2008, and U.S. Application No. 61 / 226,134, filed July 16, 2009, the entire contents of which are incorporated herein by reference.

[0004] The entire contents of U.S. Application No. 12 / 397,850, filed on March 4, 2009, are incorporated herein by reference. Technical Field

[0005] This invention relates to systems and methods for controlling the humidity of breathable gases for various forms of respiratory device ventilation systems, including invasive and non-invasive ventilation devices, continuous positive airway pressure (CPAP), bilevel therapy, and sleep disorder breathing (SDB) conditions such as obstructive sleep apnea (OSA), as well as for various other respiratory disorders and diseases. Background Technology

[0006] To reduce airway dryness and associated discomfort and complications, breathing devices typically have the ability to alter the humidity of the breathable gas. A humidifier placed between the airflow generator and the patient mask produces humidified gas, which minimizes dryness of the nasal mucosa and increases airway comfort. Furthermore, in colder environments, warmer air, generally more comfortable than cold air, is often directed towards the face inside and around the mask.

[0007] Many types of humidifiers are available, although the most convenient form is one that is integrated with or configured to be attached to an associated respiratory device. While passive humidifiers can provide some relief, heated humidifiers are generally preferred to provide sufficient humidity and temperature to ensure patient comfort. A typical humidifier includes: a water tank with a capacity of several hundred milliliters; a heating element for heating the water in the tank; a controller to adjust the humidification level; a gas inlet for receiving gas from a gas flow generator; and a gas outlet suitable for connection to a patient tubing that delivers humidified gas to the patient's face mask.

[0008] Typically, the heating element is integrated on a heating plate located below the water tank and in thermal contact with the water tank. Summary of the Invention

[0009] One aspect of the invention is a breathing device comprising: a humidifier for humidifying a breathable airflow to be delivered to a patient, wherein the housing of the humidifier is insulated to reduce the water temperature and electricity consumed by the device.

[0010] Another aspect of the invention is a humidifier for a breathing apparatus, comprising a chamber that can be pressurized to reduce the pressure at the joint of the humidifier housing, thereby reducing leakage.

[0011] Another aspect of the invention is a humidifier for a breathing apparatus, comprising a chamber that can be pressurized to reduce the tolerance of the insertion of seals on the inlet and outlet pipes of the chamber relative to the humidifier chamber.

[0012] Another aspect of the invention is a humidifier for a breathing apparatus, which directs airflow over the surface of a supply of water contained in a chamber to humidify the breathable airflow regardless of the water level.

[0013] Another aspect of the invention is a humidifier for a breathing apparatus, which includes a seal that is not located below the supply water, thereby reducing the risk of leakage.

[0014] Another aspect of the invention is a humidifier for a breathing device that prevents water from overflowing back into the airflow generator or hair dryer that generates a breathable airflow.

[0015] Another aspect of the invention is a humidifier for a breathing apparatus, comprising a disposable box.

[0016] Another aspect of the invention is a humidifier for a breathing apparatus, comprising a washable and / or reusable housing.

[0017] Another aspect of the invention is a humidifier for a breathing apparatus, comprising a housing including a water level indicator, such as a water level indicator indicating the maximum inlet water level. Yet another aspect of the invention relates to a water level indicator that is removable from the housing. Still another aspect of the invention relates to a water level indicator within the housing that can be viewed through a window of the humidifier. Yet another aspect of the invention relates to a water level indicator that appears to change color as the water level changes, for example, appearing as a darker color or a mixture of colors.

[0018] Another aspect of the invention is a humidifier for a respiratory device, which is connected to a heated or non-heated tube for delivering a humidified airflow to a patient.

[0019] A further aspect of the invention relates to a box that can be detached from the humidifier and configured to prevent any water flowing out of the box from returning to the airflow generator.

[0020] According to an embodiment, a humidifier for humidifying a breathable airflow to be delivered to a patient includes: a chamber configured to receive the breathable airflow; a box configured to contain supply water, the box being configured to be inserted into the chamber; a lid disposed on the chamber and movable between an open position and a closed position; and a seal disposed on the lid, the seal being configured to seal the chamber to pressurize the chamber with the breathable airflow.

[0021] According to yet another embodiment, a box for insertion into a humidifier chamber includes: a box base configured to receive supply water; a box lid; a flow plate; and a seal connected to the flow plate, wherein the flow plate is located between the box base and the box lid via engagement of the seal with a sidewall edge of the box base and a sidewall edge of the box lid.

[0022] According to yet another embodiment, a breathing device for providing a patient with a humidified breathable airflow includes: an airflow generator that generates a breathable airflow and a humidifier and / or box as described above.

[0023] According to yet another embodiment, a humidifier for humidifying a breathable airflow to be delivered to a patient includes: a chamber configured to receive the breathable airflow; a housing configured to contain supply water, the housing being configured to be inserted into the chamber; and a lid disposed on the chamber and movable between an open position and a closed position. The housing includes: a housing base configured to contain the supply water; a housing lid; and a flow plate disposed between the housing base and the housing lid, wherein the flow plate includes a water level indicator configured to indicate the water level of the supply water in the housing base.

[0024] According to another embodiment, the tank is configured to receive supply water and is inserted into the chamber of a humidifier. The tank includes: a tank base configured to receive the supply water; a tank cover; and a flow plate disposed between the tank base and the tank cover, wherein the flow plate includes a water level indicator configured to indicate the water level of the supply water in the tank base. The water level indicator includes a generally rectangular portion and a generally triangular portion. The generally triangular portion includes an inclined wall extending at least partially below the flow plate, the inclined wall including a drain hole and a marking. Attached Figure Description

[0025] Embodiments of the present invention will now be described with reference to the accompanying drawings, wherein:

[0026] Figure 1 A breathing device including an airflow generator and a humidifier according to an embodiment of the present invention is schematically illustrated;

[0027] Figure 2 schematically illustrated Figure 1 A humidifier with its lid in the closed position;

[0028] Figure 3 schematically illustrated Figure 1 The humidifier with its lid in the open position;

[0029] Figure 4 schematically illustrated Figure 1 A partial exploded view of the humidifier components;

[0030] Figure 5 schematically illustrated Figure 4 Humidifier holder;

[0031] Figure 6 The diagram schematically illustrates the lid closing mechanism of a humidifier;

[0032] Figure 7 schematically illustrated Figure 1 The humidifier's electrical connectors and pipe connectors;

[0033] Figure 8 schematically illustrated Figure 1 The humidifier holder and the bottom of the humidifier;

[0034] Figure 9 The diagram schematically illustrates the assembly structure. Figure 8 Humidifier holder and humidifier base;

[0035] Figure 10 schematically illustrated Figure 1 The inner panel of the humidifier;

[0036] Figure 11 schematically illustrated Figure 1The humidifier's control panel;

[0037] Figure 12 The diagram schematically illustrates the components including the outlet pipe. Figure 1 Humidifier;

[0038] Figure 13 A schematic diagram illustrating the use of Figure 12 The sealing ring of the humidifier outlet pipe;

[0039] Figure 14 schematically illustrated Figure 12 The outlet pipe of the humidifier;

[0040] Figure 15 The schematic diagram illustrates the inner plate, outlet pipe, and pipe connector. Figure 1 Humidifier;

[0041] Figure 16 schematically illustrated Figure 1 The humidifier's lid and seals;

[0042] Figure 17 The diagram schematically illustrates the assembly structure. Figure 16 The cover and seals;

[0043] Figure 18 schematically illustrated Figure 1 A side view of a humidifier;

[0044] Figure 19 schematically illustrated Figure 1 The humidifier's water tank includes a tank base and a flow plate;

[0045] Figure 20 schematically illustrated Figure 19 A 3D view of the bottom of the flow meter;

[0046] Figure 21 A sample embodiment schematically illustrates the disassembled components of the box, including... Figure 19 The box base and flow plate;

[0047] Figure 22 The diagram illustrates the assembled assembly. Figure 21 The box;

[0048] Figure 23 schematically illustrated Figure 22 A cross-sectional view of the box;

[0049] Figure 24 schematically illustrated Figure 22 A sectional view of the box;

[0050] Figure 25 schematically illustrated Figure 21 The seal between the flow plate and the box body;

[0051] Figure 26 A box according to another sample embodiment is illustrated schematically;

[0052] Figure 27 schematically illustrated Figure 26 The exploded component view of the box;

[0053] Figure 28 schematically illustrated Figure 26 and 27 A plan view of the box;

[0054] Figure 29 The schematic diagram shows the cross-sectional view taken along line 29-29;

[0055] Figure 30 The diagram schematically illustrates a cross-sectional view taken along line 30-30;

[0056] Figure 31 The diagram schematically illustrates the bottom perspective view of the flow plate and tank cover in their assembled state;

[0057] Figure 32 schematically illustrated Figure 31 Cross-sectional views of the flow plate and tank cover;

[0058] Figure 33 A detailed view of the flow plate being connected to the tank cover is schematically illustrated;

[0059] Figure 34 The illustration shows a cross-sectional view of a box in its assembled state, the box including a box base;

[0060] Figure 35 The diagram schematically illustrates the connection between the tank base, flow plate, and tank cover;

[0061] Figure 36 The diagram schematically illustrates a three-dimensional view of the box in its assembled state;

[0062] Figure 37 The diagram schematically illustrates a top-view perspective of the flow meter.

[0063] Figure 38 The diagram schematically illustrates a bottom-view perspective of the flow meter.

[0064] Figure 39 A schematic diagram of a plan view of a flow meter is shown.

[0065] Figure 40 The diagram schematically illustrates a cross-sectional view taken along line 40-40;

[0066] Figure 41 A schematic diagram of the flow meter's bottom view is shown.

[0067] Figure 42 The diagram schematically illustrates the assembly of the flow plate and the seal;

[0068] Figure 43 A schematic diagram of a plan view of a flow meter is shown.

[0069] Figure 44 The schematic diagram shows the cross-sectional view taken along line 44-44;

[0070] Figure 45 A schematic diagram of the flow meter's bottom view is shown.

[0071] Figure 46 The maximum water level indicator on the flow meter is illustrated schematically.

[0072] Figure 47 A schematic diagram shows a cross-sectional view of the maximum water level indicator on the flow meter;

[0073] Figure 48 A schematic diagram illustrates a detailed view of the wedge-shaped component of the connecting beam of the flow plate;

[0074] Figure 49 A schematic diagram illustrates a detailed view of the maximum water level indicator;

[0075] Figure 50 A perspective view of a box according to another sample embodiment is schematically illustrated;

[0076] Figure 51 schematically illustrated Figure 50 Another perspective view of the box;

[0077] Figure 52 schematically illustrated Figure 50 A top view of the box;

[0078] Figure 53 schematically illustrated Figure 50 The disassembled components of the box;

[0079] Figure 54 It is illustrated schematically from another perspective. Figure 50 The disassembled components of the box;

[0080] Figure 55a and 55b schematically illustrated Figure 50 A cross-sectional view of the box;

[0081] Figure 56 schematically illustrated Figure 50 A 3D view of the flow meter of the box;

[0082] Figure 57 schematically illustrated Figure 56 Another 3D view of the flow meter;

[0083] Figure 58 schematically illustrated Figure 56 and 57 A top view of the flow meter;

[0084] Figure 59 schematically illustrated Figures 56 to 58 A bottom view of the flow meter;

[0085] Figures 60a to 60c The illustration shows the possible interaction with Figures 56 to 59 A water level indicator used in conjunction with a flow meter;

[0086] Figure 61 schematically illustrated Figures 56 to 60c A three-dimensional view of the flow meter and water level indicator, and illustrations of... Figures 50 to 5 The lid of the box with the number 5;

[0087] Figure 62 schematically illustrated Figure 61 Another perspective view of the flow meter, water level indicator, and tank cover;

[0088] Figure 63 A disassembled assembly of a box is schematically illustrated according to another embodiment, including... Figure 19 The box base and flow plate;

[0089] Figure 64 The diagram illustrates the assembled assembly. Figure 63 The box;

[0090] Figure 65 schematically illustrated Figure 64 A cross-sectional view of the box;

[0091] Figure 66 schematically illustrated Figure 64 A sectional view of the box;

[0092] Figure 67 schematically illustrated Figure 63 The seal between the flow plate and the box body;

[0093] Figure 68 The disassembled components of a box according to another sample embodiment are schematically illustrated;

[0094] Figure 69 It is illustrated schematically from another perspective. Figure 68 The disassembled components of the box;

[0095] Figure 70schematically illustrated Figure 68 and 69 A three-dimensional view of the box;

[0096] Figure 71 schematically illustrated Figure 68 and 69 Another perspective view of the box;

[0097] Figure 72 schematically illustrated Figures 68 to 71 A sectional view of the box;

[0098] Figure 73 The illustration schematically depicts a heated air delivery hose, tube, or conduit including a housing with a humidifier connector;

[0099] Figure 74 and 75 schematically illustrated Figure 73 The air delivery hose, tube, or catheter includes a sheath that connects the hose, tube, or catheter to a patient interface such as a face mask; and

[0100] Figure 76 schematically illustrated Figure 56 and 57 Cross-sectional views of hoses, tubes or conduits and sheaths. Detailed Implementation

[0101] breathing apparatus

[0102] Combination Figure 1 The breathing device 10 includes an airflow generator or blower 12 and a humidifier 14. The humidifier 14 includes a humidifier chamber 16 and a cover 18 pivotable between an open and closed position. A water chamber or tank 20 is disposed within the humidifier chamber 16 and is covered by the cover 18 when it is in the closed position. A seal 19 is provided on the cover 18, such as... Figure 15 A more detailed illustration is provided. The cover 18 includes a window 30 to allow visual inspection of the contents of the humidifier housing 20. The seal 19 includes an opening 31 corresponding to the position of the window 30 on the cover 18.

[0103] Box 20 includes a lid 86 configured to guide a breathable airflow generated by airflow generator 12 along a channel 90 and through an outlet 92 into box 20, as described in more detail below. Box 20 includes an outlet 88 for allowing humidified breathable airflow to exit into a tube configured to deliver the humidified airflow to a patient interface (e.g., a face mask).

[0104] humidifier

[0105] like Figure 2As shown, the humidifier 14 can be connected to the airflow generator 12 via a connector or latch 24. The latch 24 can be, for example, a spring-biased latch that engages a corresponding recess (not shown) in the airflow generator 12. An electrical connector 26 is provided to electrically connect the airflow generator 12 to the humidifier 14. Power can be supplied from the airflow generator 12 to the humidifier 14, although it should be understood that the humidifier can have its own power supply. Control signals can also be supplied from the airflow generator 12 to the humidifier 14 via the electrical connector 26.

[0106] It should be understood that the humidifier 14 may include its own control system, such as a microprocessor disposed on a printed circuit board (PCB). The PCB may be located within the walls of the humidifier chamber 16 and may include light-emitting elements, such as LEDs, to illuminate the contents of the chamber 20, allowing for visual inspection of the water level. Figure 4 A hole 35 may be provided on the wall of the humidifier chamber 16 to allow a light source on the PCB to illuminate the humidifier chamber 16. A cover 37 is used to cover the hole 35 to prevent light from entering the PCB and the light source (e.g., an LED) from the humidifier chamber 16. The cover 37 may be transparent or colored to allow colored light, such as green light, to appear within the humidifier chamber 16. The light source is configured to illuminate the humidifier chamber 16 to allow the water level in the water tank 20 to be visible. Alternatively, multiple light sources may be located on the PCB to provide different indications regarding humidifier heating; for example, an amber light source may be provided to indicate that the humidifier is heating to the desired temperature, and a blue light source may be provided to identify when the humidifier is at the desired temperature.

[0107] The humidifier 14 includes a humidifier chamber 16 and a cover 18 pivotally connected to the humidifier chamber 16. Figure 3 and 4 As shown, the cover 18 includes a hinge portion 17, which is hinged to a hinge portion 47 disposed on the humidifier chamber 16. Figure 3 The bottom 54 of the humidifier is mounted on the humidifier chamber 16, such as... Figure 8 As shown in more detail below, an opening member 28 is provided for releasing the cover 18 to allow the cover to pivot to the open position.

[0108] Combined Figure 3 and Figure 4The cover 18 includes a catch 15 configured to be engaged by a latch 44 to hold the cover in a closed position. The seal 19 also includes a wedge-shaped protrusion 13 configured to engage the water tank 20, for example, the tank cover 86, when the cover 18 is in the closed position, to push the tank 20 toward the outlet 34 of the humidifier chamber 16, thereby facilitating the formation of a seal between the water tank outlet 88 and the humidifier chamber outlet 34. A dome 11 is also provided on the seal 19 to push the water tank 20 against the heating plate 36 when the cover 18 is in the closed position. An annular sealing portion or sealing ring 21 is also provided on the seal 19 to seal the tank drain outlet 89 provided on the tank cover 86 when the cover 18 is in the closed position.

[0109] Combined Figure 2 and 4 The humidifier chamber 16 also includes an air inlet 22, which is configured to receive a breathable airflow generated by the airflow generator 12 when the humidifier 14 is connected to the airflow generator 12 via a latch 24. The inlet 22 directs the airflow into a channel 90 in the lid 86 of the water tank 20 (see...). Figure 1 , Figure 3 and Figure 21-24 The airflow is guided from channel 90 to outlet 92 and enters water tank 20.

[0110] like Figure 4 and Figure 5 As shown, the humidifier chamber 16 includes a humidifier holder 32, which includes an air inlet 22. The humidifier holder 32 also includes a humidifier chamber outlet 34 to allow humidified airflow delivery to a delivery hose, tube, or catheter configured to be connected to the humidifier to deliver humidified airflow to a patient. The outlet 34 is located on the rear side of the humidifier holder 32. It should be understood that the outlet 34 can also be located on one side of the humidifier holder 32. This modification also requires modification of the water tank 20 to align the outlet 88 of the water tank 20 with the outlet 34 of the humidifier holder 32.

[0111] Combination Figure 4 A heating plate 36 is provided to heat the supply water contained in the humidifier chamber 16. A bracket bottom 40 is disposed below the heating plate 36, and a heat insulation layer 38 is disposed between the heating plate 36 and the bracket bottom 40. The heating plate 36 can be formed of, for example, a nickel-chromium alloy or anodized aluminum, which allows the heating plate 36 to be formed thinner and have a larger surface area than currently available heating plates. The heating plate 36 may also include a thermistor controlled by, for example, control circuitry disposed on a PCB.

[0112] Combination Figures 4 to 6 The humidifier bracket 32 ​​supports a lid closing member 42 that can move between an open position and a closed position. For example... Figure 6 The lid opening member 28 shown is disposed at one end of the lid closing member 42. The lid closing member 42 includes a latch 44 configured to engage a latch 15 of the lid 18 and hold the lid 18 in a closed position. The lid closing member 42 includes a rod or post 48 supporting a spring 46 that biases the lid closing member 42 into the closed position. To open the lid 18, the user pushes the opening member 28 to overcome the bias of the spring 46. Figure 5 The right side of the spring 46 is adjusted so that the latch 44 and the cover closing member 42 move to the open position. When the user releases the cover opening member 28, the bias of the spring 46 causes the cover closing member 42 and the latch 44 to return to the closed position.

[0113] The cover closure member 42 is supported by the front retaining wall 33 of the bracket 32. The cover closure member 42 includes a tab 45 that engages with a groove 41 formed in the front retaining wall 33. The front retaining wall 33 also includes a groove 39 through which a latch 44 protrudes. The grooves 39 and 41 accommodate the sliding movement of the cover closure member 42, and the latch 44 and the tab 45 engage with the grooves 39 and 41, respectively.

[0114] like Figure 7 As shown, electrical connector 26 is connected to multiple wires 52, such as three wires, which are connected to pipe connector 50. Figure 15 The tube connector 50 is shown and described in more detail below. The tube connector 50 includes a plurality of connectors 78, the number of which corresponds to the number of wires 52 and are respectively connected to the respective wires. Although three wires 52 and three connectors 78 are shown in the figure, it should be understood that different numbers of wires and connectors can be provided, for example, two wires and two connectors. The tube connector 50 allows for the connection of heating tubes, for example, as disclosed in U.S. Patent Application No. 11 / 936,822, filed November 8, 2007, the entire contents of which are incorporated herein by reference.

[0115] like Figure 8 and Figure 9 As shown, the humidifier holder 32 is supported by the chamber bottom 54 of the humidifier chamber 16. The chamber bottom 54 includes a pair of latches 56 configured to engage corresponding latches (not shown) on the rear side of the humidifier holder 32 to secure the humidifier holder 32 to the chamber bottom 54. The chamber bottom 54 also includes a bottom opening 58 through which the bottom of the humidifier holder 32 extends. The chamber bottom 54 is configured to cover the wire 52 and the cover closure member 42 when connected to the holder 32, as... Figure 8 As shown.

[0116] Combination Figure 9-11The inner panel 60 can be secured to the humidifier bracket 32 ​​by passing over the latch 24 and the electrical connector 26. For example... Figure 10 As shown, the inner plate 60 includes a plurality of holes 62 configured to allow a latch 24 to pass through, and holes 64 to allow an electrical connector 26 to pass through. The inner plate 60 also includes a pair of holes 66 configured to receive fasteners, such as threaded fasteners 80. Figure 15 A boss 68 may also be provided on the inner plate 60 to accommodate fasteners, such as threaded fasteners 80, for securing the inner plate 60 to the humidifier bracket 32. The inner plate 60 provides backflow protection to prevent water from overflowing from the humidifier 14 back into the airflow generator 12.

[0117] like Figure 11 As shown, the latch 24 is disposed on the latch plate 23, which is located between the humidifier bracket 32 ​​and the inner plate 60. One end of the latch plate 23 is fixed to a plate 25, which is also disposed between the humidifier bracket 32 ​​and the inner plate 60. The plate 25 includes a post 29 supporting a spring 27, which is configured to bias the latch plate 23 so that the latch 24 is engaged. Figure 9 The hole 62 penetrates the inner plate 60 at the indicated position. When the humidifier 14 is connected to the airflow generator 12, the latch 24 engages a latch (not shown) provided on the airflow generator 12, overcoming the bias of the spring 27 and pushing the latch 24 and the subsequent latch plate 23 (towards) Figure 9 (Right side). Once the latch 24 is fully engaged, the spring 27 causes the latch plate 23 and the latch 24 to offset back. Figure 9 The starting position is shown, and the latch 24 engages the latch of the airflow generator 12. When the humidifier 14 is connected to the airflow generator 12, the electrical connector 26 connects to a corresponding electrical connector (not shown) in the airflow generator 12 to allow the airflow generator 12 to supply power and / or control signals to the humidifier 14. As shown, the electrical connector 26 may include one or more terminals, although it should be understood that the electrical connector 26 may include one or more connectors housed in the terminals of the airflow generator 12.

[0118] Combination Figures 12 to 14 The humidifier holder 32 may include an outlet pipe 70 configured to pass through the outlet 34. For example... Figure 14 As shown, the outlet pipe 70 may include a flange 72 and a groove 74, the flange 72 being configured to engage the rear wall 55 of the humidifier bracket 32, and the groove 74 being configured to receive... Figure 13 The sealing ring 76 is shown. The outlet tube 70 is removable to allow replacement of all components in the humidified area of ​​the humidifier, such as the replacement housing 20 and the outlet tube 70. The outlet tube 70 can be made of a sterilizable material. It should be understood that the outlet tube 70 can also be disposable.

[0119] Combination Figure 15 and 16 In the closed position, the cover 18, equipped with a seal 19, allows the humidifier chamber 16 to be sealed, and the airflow generated by the airflow generator pressurizes the humidifier chamber 16 via the airflow generator 12 as it passes through the inlet 22 of the humidifier 14. Pressurizing the humidifier chamber 16 reduces the pressure at the joint of the housing 20, thereby reducing leakage. Pressurizing the humidifier chamber 16 also reduces the tolerances relative to the seal at the inlet 22 and the insertion of the outlet pipe 70 of the humidifier chamber 16 into the housing 20. The humidifier chamber 16 also insulates the housing 20 to provide enhanced thermal characteristics and reduce power consumption. Insulating the housing 20 also reduces heat loss to the environment. The humidity output of the humidifier is determined directly from the water temperature. Because heat loss from the housing to the environment is reduced due to housing insulation, less power is required to achieve the water temperature corresponding to the desired humidity output. In addition, the introduced air is preheated as it passes through the outer wall of the chamber before entering it, which also reduces the amount of electricity required to reach the water temperature corresponding to the desired humidity output.

[0120] Or as Figure 15 As shown, the inner panel 60 is secured to the humidifier bracket 32 ​​by threaded fasteners 80, although it should be understood that other fastening components or methods may also be used to secure the inner panel 60 to the humidifier bracket 32. It should be understood that other latching structures and systems may be used to releasably secure the cover. For example, a "push to close and button to open" operation system may be used. Other examples include, but are not limited to, lever latching systems, rotary latches, or hook latches.

[0121] The outlet pipe 70 and pipe connector 50 provide the ability to connect both standard pipes and heating pipes. For example... Figure 15 As shown, the tube connector 50 and the fitting 78 are separate from the outlet tube 70. The heating tube, with a corresponding electrical connector (e.g., a terminal), can be configured to rotatably latch onto the tube connector 50. This type of connector facilitates connection and reduces tolerance accumulation in the breathing device 10. Figure 31 A heating element 134 suitable for connection to and use with humidifier 14 is described in more detail. For example... Figure 15 As shown, when the non-heating tube is connected to the outlet tube 70, the cover 132 can be attached to the rear wall of the humidifier to cover the tube connector 50 and the fitting 78. The cover 132 can be formed of flexible rubber or other suitable flexible material. Alternatively, the cover 132 can be a separate component not attached to the humidifier, which can be inserted above the connector 50.

[0122] Combination Figure 17and 18 The seal 19 includes a groove 51 configured to receive a corresponding edge or side 57 of the cover 18 to attach the seal 19 to the cover 18. A wedge-shaped protrusion 13 (also see...) Figure 3 The cover 18 is configured to engage the cover 86 when the cover 18 is in the closed position, causing the water tank 20 to be biased toward the rear wall of the humidifier chamber 16, thereby sealingly engaging the outlet 88 with the outlet pipe 70. The seal 19 also includes a sealing edge 49 extending around the periphery of the seal 19 and configured to seal the periphery of the cover 18 when the cover is in the closed position. An inner sealing edge 53 is disposed around the hole 31 of the seal 19 to seal the periphery of the window 30 of the cover 18.

[0123] Humidifier Box - Disposable - First Embodiment

[0124] Combination Figure 19 and 20 The water tank 20 includes a tank base 82 and a flow plate 84. The flow plate 84 includes a partition 96, which includes an inlet 98 configured to receive a breathable airflow guided by a channel 90 of the tank cover 86. The outlet of the channel 90 is configured to guide airflow into the inlet 98 of the partition 96 when the tank cover 86 is secured to the tank base 82, as described in detail below.

[0125] The flow plate 84 also includes a frame seal 94 configured to seal the periphery of the tank base 82 when the tank cover 86 is attached to the tank base 82. The frame seal 94 is connected to the partition plate 96 via a plurality of supports or connecting beams 100. A gap 87 is provided between the partition plate 96 and the frame seal 94 via the connecting beams 100.

[0126] A water level indicator 102 is mounted on the partition plate 96 of the flow plate 84 to indicate the water level. For example... Figure 18-20 As shown, the water level indicator 102 may include a truncated conical portion. (As indicated...) Figure 23As shown, the water level indicator 102 may be conical. A small drain hole 104 is located at the bottom of the water level indicator 102 to allow water to enter the water level indicator 102 and then drain water from the bottom of the water level indicator 102 into the tank base 82 as the water level drops in the tank base 82. Once the water level in the tank base 82 reaches the height of the small drain hole 102, the water level indicator 102 provides an indication of the water level in the tank 20 by allowing water to enter the water level indicator 102, and then allows water to enter the tank base 82 until the water in the water level indicator 102 reaches a desired water level (such as the water level indicated by the mark 103). Although the water level indicator 102 provides an indication of the water level, the water level is not critical when a breathable airflow is directed to the surface of the water contained in the tank base 82 because the airflow will make good contact with the surface of the water. The water level indicator 102 may be provided with a mark 103 to indicate the maximum water level of the water tank 20. Light emitted from the PCB through hole 35 allows the water level in the water level indicator 102 to be seen.

[0127] Combination Figure 21-25 According to a sample embodiment of the present invention, the water tank 20 is configured for single use. The tank 20 includes a tank base 82 configured to receive supplied water. A tank cover 86 is disposed on the tank base 82. The tank cover 86 can be fixed to the tank base 82, for example, by welding. The tank 20 can be formed from, for example, a plastic material, metal, or a combination of metal and plastic.

[0128] like Figure 23 and Figure 24 As shown, the flow plate 84 is disposed on the housing base 82. The housing cover 86 includes a channel 90 that receives a breathable airflow generated by the airflow generator 12 that enters the humidifier 14 through the air inlet 22. Figure 23 As shown, the channel 90 includes a channel outlet 92 housed in an inlet 98 of a partition 96. The partition 96 ensures that breathable airflow passes through the entire box as air enters at the center, flows to the outside of the box, and then rises through the gap between the wall of the box base 82 and the partition 96 to the outlet 88 of the box lid 86.

[0129] Combination Figure 25 The box base 82 includes a box base edge 118, which is engaged by a latch 130 of the box cover 86 to connect the box base 82 and the box cover 86. The frame seal 94 includes a seal 112 disposed between the latch 130 of the box cover 86 and the edge 118 at the box base 82. A wedge 114 is disposed on each connecting beam 100 and connected to the seal 112 to force a sealing engagement between the seal 112 and the edge 118 and the latch 130. The wedge 114 is engaged by a wedge 116 of the box cover 86 to force a sealing engagement between the seal 112 and the edge 118 and the latch 130.

[0130] Humidifier Box - Disposable - Second Embodiment

[0131] Combination Figure 26-49 The illustration shows a humidifier box configured for disposable use according to another embodiment. The humidifier box 20 may include a box base 82 and a box lid 86 having a channel 90. The box lid 86 may also include a box outlet 80 for delivering a humidified, breathable airflow. A box drain outlet 89 may also be provided in the box lid 86.

[0132] Combination Figure 27 The humidifier box 20 may also include a flow plate 84 with a partition 96. An inlet 98 is located at the outlet 92 of the passage 90 with the box cover 86. Figure 28 The corresponding partition plate 96 is located on the flow plate 84. The partition plate 96 of the flow plate 84 is connected to the frame seal 94 via multiple connecting beams 100. A gap 87 is provided between the frame seal 94 and the partition plate 96.

[0133] Combination Figure 27 , Figure 29 , Figure 30-32 , Figure 37-41 and Figures 43-49 The humidifier housing 20 may also include a water level indicator 102. The water level indicator 102 may be mounted on the partition plate 96 of the flow plate 84. As shown in the figure, for example, in... Figure 39 In this embodiment, the water level indicator 102 may have a generally polygonal perimeter, including a generally rectangular portion 175 and a generally triangular portion 177. However, it should be understood that other peripheral shapes may be provided for the water level indicator 102, including regular polygons (e.g., squares, rectangles, pentagons), or polygons composed of combinations of regular polygons, or polygons combined with curved surfaces.

[0134] like Figure 31 , Figure 37 , Figure 39 , Figure 41 , Figure 43 , Figure 45 , Figure 46 and Figure 49 As shown, the water level indicator 102 includes a drain hole 104 to allow water to drain from the bottom of the water level indicator 102 into the tank base 82. As illustrated, for example, in... Figure 49 In this embodiment, the drain hole 104 is not located at the bottom of the water level indicator 2, but rather in the middle position between the bottom and top of the water level indicator 102 to allow any converging water to drain from the middle position. In this embodiment, the water level indicator 102 is not for injecting water; rather, the water level is indicated by the slope of the water level indicator, as described in more detail below. Figure 37 As shown, the drain hole 104 is located on a plane that roughly corresponds to the partition plate 96 of the flow plate 84. Or as... Figure 37 As shown, and as Figure 31 , Figure 38 , Figure 39 , Figure 41 , Figure 43 , Figure 45 and Figure 46 As shown, the water level indicator 102 may include a mark 103 indicating the maximum water level in the humidifier tank 20. As shown, the mark 103 may be positioned at the same height as the drain hole 104 on the water level indicator 102.

[0135] Combination Figure 49 When the tank is assembled, the generally triangular portion of the water level indicator 102 extends into the tank base 82 below the frame seal 94 and includes a first inclined wall 109 and a second inclined wall 111. As the water level in the tank base 82 increases during injection, the water level will first contact the bottom of the water level indicator 102. As the water level continues to rise, the second inclined wall 111 guides the water level toward the drain hole 104 and the marker 103, which are located in the inclined wall 111 between the frame seal 94 and the flow plate separator 96. As the water level continues to rise and approaches the drain hole 104, the visibility of the water level associated with the marker 103 increases. Since the marker 103 is located at the same height as the drain hole 104, the maximum injection water level of the tank 20 is detected when the water level reaches the height of the drain hole 104 and the marker 103.

[0136] Combination Figure 33 , Figure 35 , Figure 42 and Figure 48 The seal 112 can be disposed around the wedge 114 of the connecting beam 100. The wedge 116 of the cover 86 is configured to engage the wedge 114 of the partition plate 96 of the flow plate 84, thereby forcing the seal 112 between the edge 118 of the box base 82 and the latch 130 of the cover 86. Figure 48 As shown, the wedge 114 may include a flange 105 around its periphery, the flange 105 including a groove 107 configured to receive a portion of the seal 112, for example, as Figure 33 As shown.

[0137] Humidifier Box - Disposable - Third Embodiment

[0138] Combination Figures 50-62According to another sample embodiment illustrated, the humidifier water tank 20 is configured for single use. The humidifier tank 20 includes a tank base 82 and a tank cover 86. The tank cover 86 includes an elliptical opening 300 and a sump region 340 surrounding an outlet 92 of a channel 90 formed in the tank cover 86 to direct airflow from an airflow generator onto the water contained in the tank 20. The sump region 340 facilitates water inflow into the tank 20 by providing a larger inlet area than the outlet 92 of the flow channel 90.

[0139] The cover 86 also includes a shroud 301 that covers the portion of the flow channel 90 from the airflow generator 12 to the inlet 98 of the tank 20, which is angled downward toward the airflow generator 12. If the tank 20 is filled with water but remains connected to the airflow generator 12, the shroud 301 prevents any water flow back into the airflow generator 12, as water can only flow into the area within the tank provided by the opening 300, which is designed to guide water downward toward the outlet 92.

[0140] like Figure 53-62 As shown, a water level indicator 320 can be mounted on the humidifier housing 20, which is visible through the window 30 of the cover 18. The water level indicator 320 may include a base portion 307 and a tilting portion 303 extending from the base portion 307. The tilting portion 303 may include markings 304 to indicate different water levels. The tilting portion 303 may also include a mark 311 to indicate the maximum injection water level.

[0141] The water level indicator 320 can be detachably connected to the partition plate 96 of the flow plate 84 via a post 305. The post 305 can be inserted into a hole 309 on the partition plate 96 of the flow plate 84. Figures 60a-60c As shown, the column 305 may include a latch 313, which is resilient to the rest of the column 305. A leg 315 is connected to the base 307 of the water level indicator 320, and the latch 313 may be located at the end of the leg 315. The legs 315 may be connected via a cross member 317, such as... Figure 59 , 60b As shown in Figure 61.

[0142] The water level indicator 320, such as the tilting portion 303, can be made of a colored plastic material, such as yellow. The water level indicator 320 can be, for example, translucent. When water is poured into the tank 20, the water level indicator 320 may appear to change color, for example, appearing slightly darker or pale yellowish-green as the water level rises.

[0143] As shown in the figure, the water level indicator 320 can be an arched D-shape, although it should be understood that other shapes can be used. It should also be understood that the water level indicator 320 can be attached to the partition plate 96 of the flow plate 84 via a structure different from that of the column 305 shown and described in the figures. For example, the water level indicator 320 can be adhesively attached to the partition plate 96, or the water level indicator 320 can be integrally formed (e.g., molded) with the partition plate 96 of the flow plate 84.

[0144] Humidifier box—reusable and washable—first embodiment

[0145] Combination Figures 63-67 According to another embodiment of the invention, the container 20 is configured to be reusable and washable. The container base 82 includes a plurality of clips 106 configured to engage a container cover 86 and hold the container cover 86 connected to the container base 82. Clips 108 are also provided, and clips 108 include holes 110 to receive the outlet 88 of a flow plate, such as... Figure 63 As shown.

[0146] The flow plate 84 is configured to be removable from the tank base 82 and is not permanently fixed to the tank base 82. For example... Figure 65 and Figure 67 As shown, the connecting beam 100 of the flow plate 84 includes a wedge 114 connected to a seal 112. The seal 112 is forced into a sealing engagement between the edge 120 of the cover 86 and the edge 118 of the base 82. A clip 106 is provided to clamp the cover 86 to the base 82, while the seal 112 is secured between the cover 86 and the base 82 in a sealing engagement. A first portion 124 of the clip 106 engages the base 82 upwards to the edge 118, and a second portion 126 of the clip 106 is configured to engage a protrusion 128 of the cover 86, thereby securing the cover 86 and the base 82 together.

[0147] The humidifier 14 does not include any seals disposed below the supply water in the housing base 82. The cover 18 includes a seal 19 to allow pressure at the housing joint to be reduced by airflow supplied by the airflow generator 12, thereby reducing leakage. The housing includes disposable and reusable / washable housings. Pressurizing the humidifier chamber also reduces the tolerance of the seals on the humidifier inlet and outlet pipes 70 relative to the water tank. A sealing ring 76 disposed on the outlet pipe 70 is located on the outer surface of the humidifier bracket 32 ​​and is not disposed below the supply water contained in the housing base 82.

[0148] Humidifier box—reusable and washable—Second embodiment

[0149] Combination Figures 68-72According to another embodiment, the water tank 20 is configured to be reusable and washable. The tank 20 may have a water level indicator 320 similar to the water level indicator described with respect to the previous embodiments. It should be understood that the tank 20 may be equipped with any of the water level indicators described herein.

[0150] The lid 86 may include a cover 301 to cover the inlet area of ​​the flow passage 90 adjacent to the inlet 22 of the humidifier 14 connected to the airflow generator 12.

[0151] like Figures 68-72 As shown, the lid 86 can be secured to the box base 82 by a plurality of clips 106, 108. Clip 108 may have an opening configured to receive an outlet 88 of the box 20. The lid 86 may include a protrusion 128 received in an opening 129 of clip 106. The lid 86 may also include a protrusion 152 received in an opening 151 in clip 108.

[0152] Or as Figures 68-72 As shown, the lid 86 may include a recess 330 that accommodates the user's fingers when the lid 86 is inserted into the box base 82, providing space between the lid 86 and the clip 106 so that the protrusion 128 is received in the hole 129. The recess 330 may also accommodate fingers during removal of the lid 86 from the base 82, for example, allowing parts of the box 20 to be disassembled and cleaned.

[0153] It should be understood that the reusable and washable tank may include a water level indicator as discussed above in relation to the disposable tank embodiment. It should also be understood that the reusable and washable tank may include more than one water level indicator as discussed above in relation to the embodiments. It should be further understood that the water level indicator or indicator or tank may not include a mark indicating the maximum water level.

[0154] heating element

[0155] Combination Figure 73The heating element 134 can be connected to the outlet pipe 70 of the humidifier 14. The heating element 134 includes a sleeve 136, which includes a humidifier connector 138 configured to connect to the pipe connector 50 of the humidifier 14. The humidifier connector 138 includes a terminal 140 configured to receive a connector 78 of the pipe connector 50 when the humidifier connector 138 and the pipe connector 50 are connected. The sleeve 136 can be formed as described in U.S. Application No. 11 / 936,822, the entire contents of which are incorporated herein by reference. The heating element may include, for example, two or three wires, and can send and receive signals to and from a controller in the humidifier and / or airflow generator, as described in U.S. Application No. 11 / 936,822. It is configured to be inserted into... Figure 15 The end of the humidifier connector 138 in the tube connector 50 may have an angle 200 to facilitate insertion of the connector 138 into the tube connector 50. The angle 200 may be between approximately 15° and 35°.

[0156] Combination Figures 74-76 The heating tube 134 can be connected to a patient interface (e.g., a face mask) via a sleeve 142 disposed at its end. A wing-shaped fastener 144 is disposed within the sleeve 142 and includes a thermistor 148, such as... Figure 75 As shown. The shape of the airfoil fixture 144 provides a smooth airflow around the airfoil fixture 144, thereby allowing the thermistor 148 to provide a good reading of the temperature of the breathable airflow in the tube 134. The sleeve 142 can be formed, for example, by overcasting onto the front plate 146, or by any method described, for example, in U.S. Application No. 11 / 936,822. The thermistor 148 is connected to wires in the heating tube 134 via a lead frame 150. The temperature detected by the thermistor 148 can be set to a signal from the thermistor 148 through the lead frame 150 and wires to a controller located in the humidifier and / or airflow generator.

[0157] Tube 134 may have an inner diameter of 15 mm. Tube 134 may be heated using an electrical wire as described in U.S. Application No. 11 / 936,822. A 15 mm unheated air delivery tube may also be used. The 15 mm inner diameter tube may be connected to tube connector 50 and the patient interface using a 22 mm isotaper connection.

[0158] Although the invention has been described in conjunction with embodiments currently considered most practical and preferred, it should be understood that the invention is not limited to the disclosed embodiments; rather, it is intended to cover various modifications and equivalent structures included within the spirit and scope of the invention. Furthermore, the various embodiments described above can be implemented in combination with other embodiments; for example, a solution of one embodiment can be combined with a solution of another embodiment to achieve yet another embodiment. Moreover, each individual feature or component of any given component can constitute another embodiment. Furthermore, various combinations of each individual component of any given component, one or more portions of a single component of any given component, and components of one or more embodiments may include one or more decorative design features. Furthermore, although the invention is particularly applicable to patients with obstructive sleep apnea, it should be understood that patients with other conditions (e.g., congestive heart failure, diabetes, morbid obesity, stroke, and gastric bypass surgery, etc.) can also benefit from the above principles. Moreover, the above principles are also applicable to patients and non-patients in similar non-medical applications.

[0159] In this specification, the term "including" should be understood as having an "open" meaning, that is, "including...", and is therefore not limited to its "closed" meaning, that is, "consisting of only...". The corresponding words "including", "included", and "containing" also have corresponding meanings.

[0160] It should be further understood that, unless there are instructions to the contrary, any reference to known prior art does not constitute the understanding that such prior art is generally known to those skilled in the art to which this invention pertains.

Claims

1. A breathing apparatus for delivering a flow of breathable gas to a patient, the breathing apparatus comprising: a flow generator configured to generate a flow of breathable gas, the flow generator comprising a plurality of catches on a side wall and electrical connectors; and a humidifier, the humidifier comprising: a humidifier chamber removably connectable to the flow generator, the humidifier chamber comprising: a bottom surface having a heating plate; a back wall; a front wall opposite the back wall; a first lateral side wall adjacent to the flow generator, the first lateral side wall comprising a plurality of catches between the front wall and the back wall and electrical connectors; a second lateral side wall opposite the first lateral side wall; and an inlet configured to receive the flow of breathable gas generated by the flow generator when the plurality of catches on the first lateral side wall of the humidifier chamber engage the plurality of catches on the side wall of the flow generator, the inlet being disposed on the first lateral side wall; a tank configured to hold supply water and removably insertable into the humidifier chamber, the tank comprising a tank base and a tank lid; a humidifier lid pivotably connected to the humidifier chamber and pivotable between an open position in which the tank can be inserted into the humidifier chamber from above and a closed position in which the humidifier lid covers the inserted tank, the humidifier lid comprising: a seal configured to engage the tank when the humidifier lid is in the closed position, and wherein the tank lid is configured to be in contact with the seal when the humidifier lid is in the closed position; and at least one catch configured to engage at least one catch on the humidifier chamber to hold the humidifier lid in the closed position; and a lid securing member having a lid open portion and a lid close portion, the lid open portion being disposed to release the humidifier lid to allow the humidifier lid to pivot to the open position, the lid close portion comprising the at least one catch on the humidifier chamber and being biased to the closed position to maintain the humidifier lid in its closed position, wherein moving the lid open portion moves the lid close portion to an open position in which the at least one catch is moved to allow the at least one catch of the humidifier lid to release from the at least one catch, wherein the heating plate is configured to heat the supply water held in the tank, and wherein the electrical connectors on the first lateral side wall of the humidifier chamber connect with the electrical connectors on the side wall of the flow generator when the humidifier chamber is connected with the flow generator.

2. The respiratory device of claim 1, wherein, The humidifier lid and the humidifier chamber are configured such that when the humidifier lid is in the closed position, the interior of the humidifier chamber is isolated from the atmosphere.

3. The respiratory device of claim 1, wherein, The humidifier chamber thermally insulates the tank to reduce heat loss to the ambient environment.

4. The breathing apparatus of claim 1, wherein, The plurality of catches on the first lateral side wall of the humidifier chamber are biased to engage the plurality of catches on the side wall of the flow generator when the humidifier is removably connected with the flow generator.

5. The respiratory device of claim 1, wherein, A hole is provided in a wall of the humidifier chamber so that the water level in the tank can be seen.

6. The respiratory device of claim 1, wherein, The tank base and tank cover are detachable.

7. The respiratory device of claim 1, wherein, The tank base is configured to be pressed against the heating plate when the humidifier cover is in the closed position.

8. The respiratory device of claim 1, wherein, The tank includes a flow plate between the tank base and the tank cover.

9. The respiratory device of claim 8, wherein, The flow plate includes a frame seal configured to seal the perimeter of the tank base when the tank cover is connected to the tank base.

10. The respiratory device of claim 9, wherein, The tank cover is configured to engage the frame seal around the entire perimeter of the tank base when the tank cover is connected to the tank base.

11. The respiratory device of claim 1, wherein, The tank cover includes at least one tank cover catch configured to engage at least one edge on the tank base to connect the tank cover and the tank base.

12. The respiratory device of claim 1, wherein, The humidifier cover includes a seal configured to engage the tank when the humidifier cover is in the closed position.

13. The respiratory device of claim 1, wherein, The tank is formed of a plastic material, a metal, or a combination thereof.

14. The respiratory device of claim 1, wherein, The outlet of the humidifier includes a tube connector that is connectable to an air delivery tube.

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