CPAP system

Abstract

This invention relates to CPAP systems. A device for humidifying a breathable airflow includes a water reservoir and a water reservoir base, the water reservoir base forming a cavity configured and arranged to receive the water reservoir in an operating position. The water reservoir includes a water reservoir base comprising a cavity configured to contain a volume of water, the water reservoir base including a body and a thermally conductive portion disposed on the body. The thermally conductive portion includes a combined layered arrangement comprising a metal plate and a thin film, the thin film comprising a non-metallic material and having a wall thickness of less than about 1 mm. The thin film is adapted to form at least the bottom inner surface of the water reservoir exposed to the volume of water, and the metal plate is adapted to form the bottom outer surface of the water reservoir.

Description

[0001] This application is a divisional application of patent application No. 202080040365.0 (PCT / IB2020 / 053608), filed with the China Patent Office on November 30, 2021, with an international application date of April 16, 2020, entitled "CPAP System".

[0002] This patent document contains a portion of copyrighted material. The copyright holder does not object to the reproduction of this patent document or patent disclosure by any person in the form it appears in the patent office documents or records, but otherwise reserves all copyright rights.

[0003] 1. Cross-references to related applications

[0004] This application claims the benefits of U.S. Provisional Application No. 62 / 835,094, filed April 17, 2019, and U.S. Provisional Application No. 62 / 897,558, filed September 9, 2019, the entire contents of which are incorporated herein by reference. Background Technology 2.1 Technical Field

[0006] This technology relates to one or more of the screening, diagnosis, monitoring, treatment, prevention, and improvement of respiratory-related disorders. This technology also relates to medical devices or equipment and their uses.

[0007] 2.2 Description of relevant technologies

[0008] 2.2.1 The Human Respiratory System and Its Disorders

[0009] The human respiratory system facilitates gas exchange. The nose and mouth form the airway entrance for the patient.

[0010] The airways consist of a series of branching tracheae, which become narrower, shorter, and more numerous as they penetrate deeper into the lungs. The primary function of the lungs is gas exchange, allowing oxygen to enter the venous blood from inhaled air and carbon dioxide to be expelled in the opposite direction. The trachea divides into the right main bronchus and the left main bronchus, which eventually further divide into terminal bronchioles. The bronchi form the conduction airways but do not participate in gas exchange. Further branches of the airways lead to the respiratory bronchioles and ultimately to the alveoli. The alveolar region of the lungs is where gas exchange occurs and is called the respiratory zone. See *Respiratory Physiology*, 9th edition, published in 2012 by John B. West, Lippincott Williams & Wilkins.

[0011] There are a range of breathing disorders. Some disorders can be characterized by specific events, such as respiratory arrest, insufficiency, and hyperventilation.

[0012] Examples of breathing disorders include obstructive sleep apnea (OSA), Cheyne-Stokes respiration (CSR), respiratory insufficiency, obesity hyperventilation syndrome (OHS), chronic obstructive pulmonary disease (COPD), neuromuscular disease (NMD), and chest wall disorders.

[0013] Obstructive sleep apnea (OSA) is a form of sleep-disordered breathing (SDB) characterized by events involving closure or obstruction of the upper airway during sleep. It arises from a combination of abnormally small upper airway size and normal loss of muscle tone in the areas of the tongue, soft palate, and posterior oropharyngeal walls during sleep. This condition causes affected patients to stop breathing, typically for periods ranging from 30 to 120 seconds, sometimes 200 to 300 times per night. This often leads to excessive daytime sleepiness and can contribute to cardiovascular disease and brain damage. Concomitant symptoms are common, especially in middle-aged overweight men, but those affected may not be aware of the problem. See U.S. Patent No. 4,944,310 (Sullivan).

[0014] Cheyne-Stokes respiration (CSR) is another form of sleep-disordered breathing. CSR is a dysregulation of the patient's respiratory controller, characterized by rhythmic alternations of waxing and waning ventilation known as CSR cycles. CSR is characterized by repetitive hypoxia and reoxygenation of arterial blood. Due to the repetitive hypoxia, CSR can be harmful. In some patients, CSR is associated with repetitive awakenings from sleep, leading to severe sleep disruption, increased sympathetic activity, and increased afterload. See U.S. Patent No. 6,532,959 (Berthon-Jones).

[0015] Respiratory failure is a broad term encompassing respiratory disorders in which the lungs are unable to inhale enough oxygen or exhale enough CO2 to meet the patient's needs. Respiratory failure can include some or all of the following disorders.

[0016] Patients with respiratory insufficiency (a form of respiratory failure) may experience abnormal shortness of breath during exercise.

[0017] Obesity hyperventilation syndrome (OHS) is defined as a combination of severe obesity and chronic hypercapnia at wakefulness, without other known causes of hypoventilation. Symptoms include dyspnea, morning headache, and excessive daytime sleepiness.

[0018] Chronic obstructive pulmonary disease (COPD) encompasses any of a group of lower airway diseases that share certain common characteristics. These diseases include increased airflow resistance, prolonged expiratory phase of breathing, and loss of normal lung elasticity. Examples of COPD include emphysema and chronic bronchitis. COPD is caused by chronic smoking (a major risk factor), occupational exposure, air pollution, and genetic factors. Symptoms include exertional dyspnea, chronic cough, and sputum production.

[0019] Neuromuscular disease (NMD) is a broad term encompassing many conditions and ailments that impair muscle function directly through intrinsic muscle pathology or indirectly through neuropathology. Some NMD patients are characterized by progressive muscle damage that leads to loss of mobility, wheelchair use, dysphagia, respiratory muscle weakness, and ultimately death from respiratory failure. Neuromuscular disorders can be classified as rapidly progressive or slowly progressive: (i) rapidly progressive disorders: characterized by muscle damage that worsens over months and leads to death within years (e.g., amyotrophic lateral sclerosis (ALS) and Duchenne muscular dystrophy (DMD) in adolescents); (ii) variable or slowly progressive disorders: characterized by muscle damage that worsens over years and only slightly shortens life expectancy (e.g., limb-girdle type, facioscapulohumeral type, and ankylosing spondylitis). Symptoms of respiratory failure in NMD include: progressive general weakness, dysphagia, shortness of breath during and at rest, fatigue, somnolence, morning headache, difficulty concentrating, and mood swings.

[0020] Chest wall disorders are a group of chest wall deformities that result in inefficient connection between the respiratory muscles and the thoracic cavity. These disorders are typically characterized by restrictive defects and have the potential to cause chronic hypercapnia-related respiratory failure. Scoliosis and / or kyphosis can cause severe respiratory failure. Symptoms of respiratory failure include: dyspnea during exercise, peripheral edema, orthopnea, recurrent chest infections, morning headache, fatigue, poor sleep quality, and loss of appetite.

[0021] A range of treatments have been used to treat or improve these symptoms. Furthermore, other healthy individuals may utilize these treatments to prevent respiratory distress. However, these treatments have many drawbacks.

[0022] 2.2.2 Treatment

[0023] Various treatments have been used to treat one or more of the above-mentioned respiratory disorders, such as continuous positive airway pressure (CPAP), non-invasive ventilation (NIV), and invasive ventilation (IV).

[0024] Continuous positive airway pressure (CPAP) therapy has been used to treat obstructive sleep apnea (OSA). The mechanism of action is that CPAP acts as an air splint and can prevent upper airway obstruction by pushing the soft palate and tongue forward and away from the posterior oropharyngeal wall. Treatment of OSA with CPAP can be voluntary, therefore patients may choose not to adhere to treatment if they find the device used to provide such treatment to be uncomfortable, difficult to use, expensive, or unsightly, among other things.

[0025] Noninvasive ventilation (NIV) provides ventilatory support to patients through the upper airway to help them breathe and / or maintain adequate oxygen levels in the body by performing some or all of the work of breathing. Ventilatory support is delivered via a noninvasive patient interface. NIV has been used to treat chronic respiratory failure (CSR) as well as forms of respiratory failure such as orthostatic hypoxia (OHS), chronic respiratory disease (COPD), non-invasive respiratory disease (NMD), and chest wall disorders. In some forms, it can improve the comfort and effectiveness of these treatments.

[0026] Invasive ventilation (IV) provides ventilatory support to patients who are unable to breathe effectively on their own and can be delivered using a tracheostomy tube. In some forms, the comfort and effectiveness of these treatments can be improved.

[0027] 2.2.3 Treatment System

[0028] These treatments can be provided by treatment systems or devices. Such systems and devices can also be used to screen, diagnose, or monitor conditions without treatment.

[0029] The treatment system may include a respiratory pressure therapy device (RPT device), an air circuit, a humidifier, a patient interface, and data management.

[0030] Another form of treatment system is the mandibular repositioning device.

[0031] 2.2.3.1 Patient Interface

[0032] A patient interface can be used to attach a breathing device to its wearer, for example, by providing an airflow into the airway inlet. The airflow can be provided to the patient's nose and / or mouth via a mask, to the patient's mouth via a tube, or to the patient's trachea via a tracheostomy tube. Depending on the treatment to be applied, the patient interface can form a seal with an area such as the patient's face, thereby facilitating the delivery of gas at a pressure sufficiently different from ambient pressure (e.g., a positive pressure of about 10 cmH2O relative to ambient pressure) to achieve the treatment. For other forms of treatment, such as oxygen delivery, the patient interface may not include a seal sufficient to facilitate the delivery of a gas supply at a positive pressure of about 10 cmH2O to the airway.

[0033] Some other mask systems may not be functionally suitable for this field. For example, a purely decorative mask may not be able to maintain adequate pressure. Mask systems for underwater swimming or diving may be configured to prevent water from flowing in from external high pressure, rather than maintaining air at a pressure higher than ambient temperature internally.

[0034] Some masks may be clinically disadvantageous for this technology, for example, in cases where they block airflow through the nose and only allow it through the mouth.

[0035] If some masks require patients to insert a portion of the mask structure into their mouths to form and maintain a seal through their lips, they may be uncomfortable or not feasible for this technology.

[0036] Some face masks may not be suitable for use while sleeping, such as when sleeping on your side with your head on the pillow.

[0037] The design of the patient interface presents several challenges. The face has a complex three-dimensional shape. The size and shape of the nose and head vary significantly from person to person. Because the head comprises bones, cartilage, and soft tissues, different areas of the face respond differently to mechanical forces. The jaw or mandible can move relative to the other bones of the skull. The entire head can move during the duration of a breathing therapy session.

[0038] Due to these challenges, some face shields suffer from one or more of the following problems: obtrusive, unattractive, expensive, mismatched, difficult to use, and uncomfortable, especially when worn for extended periods or when the patient is unfamiliar with the system. An incorrectly sized face shield can lead to decreased adherence, reduced comfort, and worse patient outcomes. Face shields designed solely for pilots, designed as part of personal protective equipment (e.g., filtering face shields), SCUBA face shields, or face shields designed for administering anesthetics may be acceptable for their original application, but are not ideally comfortable for prolonged wear (e.g., several hours). This discomfort can lead to decreased patient adherence to treatment, especially if the face shield is worn during sleep.

[0039] Assuming patient adherence, CPAP therapy is highly effective in treating certain breathing difficulties. However, patient adherence may occur if the mask is uncomfortable or difficult to use. Since patients are generally advised to wash their masks regularly, they may not wash their masks if they are difficult to clean (e.g., difficult to assemble or disassemble), which could affect adherence.

[0040] While masks designed for other applications (such as pilots) may not be suitable for treating sleep apnea, masks designed for treating sleep apnea can be used for other applications.

[0041] For these reasons, different fields have emerged for patient interfaces used to deliver CPAP during sleep.

[0042] 2.2.3.2 Respiratory Pressure Therapy (RPT) Device

[0043] Respiratory pressure therapy (RPT) devices can be used alone or as part of a system to deliver one or more of the aforementioned treatments, for example, by operating the device to generate an airflow for delivery to an airway interface. The airflow can be pressurized. Examples of RPT devices include CPAP devices and ventilators.

[0044] Air pressure generators are known in a range of applications, such as industrial-scale ventilation systems. However, air pressure generators for medical applications have specific requirements that are not met by more general air pressure generators, such as the reliability, size, and weight requirements of medical devices. Furthermore, even devices designed for medical use may have disadvantages related to one or more of the following: comfort, noise, ease of use, efficiency, size, weight, manufacturability, cost, and reliability.

[0045] One example of a specific requirement for certain RPT devices is noise.

[0046] Noise output level table for existing RPT devices (only one sample, measured in CPAP mode using the test method specified in ISO 3744 at 10 cmH2O).

[0047] RPT device name A-weighted sound pressure level dB(A) Year (approximately) <![CDATA[C series Tango TM > 31.9 2007 <![CDATA[C-Series Tango with Humidifier TM > 33.1 2007 <![CDATA[S8 Escape TM II]]> 30.5 2005 <![CDATA[With H4i TM S8 Escape humidifier TM II]]> 31.1 2005 <![CDATA[S9 AutoSet TM ]]> 26.5 2010 <![CDATA[S9 AutoSet with H5i Humidifier TM > 28.6 2010

[0048] One known RPT device for treating sleep-disordered breathing is the S9 Sleep Therapy System manufactured by ResMed Limited. Another example of an RPT device is a CPAP machine. CPAP machines include ResMed Stellar... TM The range of adult and pediatric ventilators can support a range of patients with invasive and non-invasive non-dependent ventilation for the treatment of a variety of conditions, such as, but not limited to, NMD, OHS and COPD.

[0049] Elisée TM 150 ventilator and ResMed VS III TMVentilators provide support for invasive and non-invasive dependent ventilation suitable for adult or pediatric patients to treat a variety of conditions. These ventilators offer volumetric and pressure ventilation modes with single- or dual-branch circuits. RPT devices typically include a pressure generator, such as an electric motor-driven blower or a compressed gas reservoir, and are configured to supply airflow to the patient's airway. In some cases, airflow to the patient's airway can be supplied under positive pressure. The outlet of the RPT device is connected via an air circuit to a patient interface such as those described above.

[0050] The designer of a device may be presented with an almost infinite number of options. Design standards often conflict, meaning that some design choices are far from unconventional or unavoidable. Furthermore, certain aspects of comfort and efficiency may be highly sensitive to small and subtle changes in one or more parameters.

[0051] 2.2.3.3 Humidifier

[0052] Delivering an unhumidified airflow can lead to airway dryness. Using a humidifier with an RPT device and patient interface to generate humidified gas minimizes dryness of the nasal mucosa and increases patient airway comfort. Furthermore, in colder climates, warm air applied to the patient interface and the facial area around the patient interface is generally more comfortable than cold air.

[0053] A number of artificial humidification devices and systems are known, but they may not meet the specific requirements of medical humidifiers.

[0054] When needed, typically in areas where patients may sleep or rest (e.g., in hospitals), medical humidifiers are used to increase the humidity and / or temperature of an airflow relative to ambient air. Medical humidifiers intended for bedside placement can be very small. Medical humidifiers can be configured to humidify and / or heat only the airflow delivered to the patient, without humidifying and / or heating the patient's surrounding environment. Room-based systems (e.g., saunas, air conditioners, or evaporative coolers) may also humidify the air breathed by the patient; however, these systems also humidify and / or heat the entire room, which can cause discomfort to the occupant. Furthermore, medical humidifiers may have stricter safety restrictions than industrial humidifiers.

[0055] While many medical humidifiers are known, they may have one or more drawbacks. Some medical humidifiers may provide insufficient humidification, and some may be difficult or inconvenient for patients to use.

[0056] 2.2.3.4 Data Management

[0057] Data may be obtained for clinical reasons to determine whether a patient prescribed respiratory therapy is "compliant," such as if the patient used their RPT device according to one or more "compliance rules." One example of a CPAP compliance rule is that, to be considered compliant, the patient must use the RPT device for at least four hours each night for at least 21 or 30 consecutive days. To determine patient compliance, the RPT device provider (such as a healthcare provider) may manually obtain data describing the patient's treatment with the RPT device, calculate usage over the predetermined time period, and compare it to the compliance rules. Once the healthcare provider has determined that a patient has used their RPT device according to the compliance rules, the healthcare provider may notify a third party that the patient is compliant.

[0058] Patient treatment may benefit from other aspects of communication of treatment data with third parties or external systems.

[0059] Existing methods for communicating and managing such data may be one or more of the following: expensive, time-consuming, and error-prone. Summary of the Invention

[0060] This technology aims to provide medical devices for screening, diagnosing, monitoring, improving, treating or preventing respiratory disorders, which have one or more of the following: improved comfort, cost, efficacy, ease of use and manufacturability.

[0061] The first aspect of this technology relates to devices for screening, diagnosing, monitoring, improving, treating or preventing respiratory disorders.

[0062] Another aspect of this technology relates to methods for screening, diagnosing, monitoring, improving, treating, or preventing respiratory disorders.

[0063] One aspect of certain forms of this technology is for providing methods and / or devices to improve patient adherence to respiratory therapy.

[0064] One aspect of this technology is a method for manufacturing equipment.

[0065] One aspect of certain forms of this technology is an easy-to-use medical device, for example, that can be easily used by a person without medical training, by a person with limited dexterity, vision, or by a person with limited experience in using this type of medical device.

[0066] One aspect of this technology is a portable RPT device that can be carried by an individual (e.g., around a personal home).

[0067] One aspect of this technology is a patient interface that can be cleaned at home, for example, with soapy water, without requiring specialized cleaning equipment. Another aspect of this technology is a humidifier tank that can be cleaned at home, for example, with soapy water, without requiring specialized cleaning equipment.

[0068] One aspect of this technology relates to a respiratory therapy device comprising: a source of positive pressure airflow; a chassis or housing configured and arranged to be fixed in position relative to the source during use; an inlet pneumatic connection configured to connect to the source to receive, in a sealable manner, positive pressure airflow from the source during use; a container for holding a body of water during use; the container being configured to guide the airflow such that water vapor can be transferred from the water body to the airflow during use to increase the absolute humidity of the airflow; the container including walls at least partially made of a material with relatively high thermal conductivity; a heating element; a temperature sensor; a controller for controlling the heating element; and an outlet pneumatic connection structure for receiving the airflow with increased absolute humidity. The chassis or housing is configured to hold the container in a position close to the heating element such that heat energy can be transferred from the heating element to the water body to increase the absolute humidity of the airflow. The controller is configured and arranged to energize the heating element to heat the water without boiling it. The respiratory therapy device includes a sealing device that, during use, the airflow with increased absolute humidity received at the outlet pneumatic connection structure has positive pressure relative to the environment.

[0069] Another aspect of this technology relates to a CPAP system including a humidifier, a patient interface, and an air delivery tube for delivering humidified air to the patient interface. In one example, the humidifier is integrated with an RPT device configured to generate an airflow under positive pressure.

[0070] Another aspect of this technology relates to a humidifier including a water reservoir comprising a cavity configured to hold a volume of water, and a water reservoir base configured and arranged to receive the water reservoir in an operating position.

[0071] Another aspect of this technology relates to a device for humidifying a breathable airflow. The device includes a water reservoir and a water reservoir base, the water reservoir base forming a cavity configured and arranged to receive the water reservoir in an operating position. The water reservoir includes a reservoir base comprising a cavity configured to contain a volume of water. The reservoir base includes a body and a thermally conductive portion disposed on the body. The thermally conductive portion includes a combined layered arrangement comprising a metal plate and a thin film. The thin film comprises a non-metallic material and has a wall thickness of less than about 1 mm. The thin film is adapted to form at least the bottom inner surface of the water reservoir exposed to the volume of water, and the metal plate is adapted to form the bottom outer surface of the water reservoir. The water reservoir base includes a heating plate adapted to thermally contact the metal plate of the water reservoir in the operating position to allow heat transfer from the heating plate to the volume of water.

[0072] Another aspect of this technology relates to a device for humidifying a breathable airflow. The device includes a water reservoir comprising a cavity configured to contain a volume of water, a water reservoir base configured and arranged to receive the water reservoir in an operating position, and a guide arrangement configured and arranged to guide the water reservoir into and out of the operating position. The water reservoir includes a conductive portion, and the water reservoir base includes a heating assembly adapted to thermally engage with the conductive portion of the water reservoir in the operating position to allow heat transfer from the heating assembly to the volume of water. The guide arrangement includes paths extending in a front-to-back direction and a bottom-to-top direction.

[0073] Another aspect of this technology relates to a device for humidifying a breathable airflow. The device includes a water reservoir comprising a cavity configured to contain a volume of water, a water reservoir base configured and arranged to receive the water reservoir in an operating position, and an air delivery conduit configured to deliver a breathable airflow, already humidified in the water reservoir, to a patient interface. The air delivery conduit is configured and arranged to form a direct pneumatic seal with the water reservoir.

[0074] Another aspect of this technology relates to a water reservoir comprising an inlet pipe providing an inlet for receiving a breathable airflow, and an outlet pipe providing an outlet for delivering a humidified breathable airflow, wherein the inlet pipe includes an inlet seal and the outlet pipe includes an outlet seal.

[0075] Another aspect of this technology relates to a water reservoir for a device for humidifying breathable airflow. The water reservoir includes an inlet pipe arranged to provide an inlet for receiving breathable airflow entering the water reservoir, and an outlet pipe arranged to provide an outlet for discharging humidified breathable airflow from the water reservoir. At least one of the inlet and outlet pipes changes parameters at at least one point along its length. For example, at least one of the inlet and outlet pipes may change direction and / or cross-sectional area at at least one point along its length. In a more specific instance, the inlet pipe, outlet pipe, or both may bend along its length and / or change their cross-section along its length. The change may be abrupt (stepwise) or gradual.

[0076] Another aspect of this technology relates to a water reservoir including a conductive portion adapted to be thermally joined with a heating assembly, wherein the conductive portion includes a first portion extending in a first plane and a second portion extending in a second plane offset from the first plane.

[0077] Another aspect of this technology relates to a device for humidifying breathable airflow. The device includes a water reservoir, a water reservoir base forming a cavity configured and arranged to receive the water reservoir in an operating position, and an air delivery pipe, wherein inserting / removing the water reservoir into / from the water reservoir base is independent of engaging / disengaging the air delivery pipe from the water reservoir base.

[0078] Another aspect of this technology relates to a heating assembly for a water reservoir base, the heating assembly including a heating plate, a heating element, and a thermally conductive pad disposed between the heating plate and the heating element to, for example, enhance thermal conductivity from the heating element to the heating plate.

[0079] Another aspect of this technology relates to a device for humidifying breathable airflow. The device includes a water reservoir comprising a cavity configured to contain a volume of water, a conductive portion of the water reservoir, and a water reservoir base configured and arranged to receive the water reservoir in an operating position. The water reservoir base includes a heating assembly adapted to thermally engage with the conductive portion of the water reservoir in the operating position to allow heat transfer from the heating assembly to the volume of water. The heating assembly includes a heating plate in thermal contact with the conductive portion of the water reservoir, a heating element, and a thermally conductive pad disposed between the heating plate and the heating element. The thermally conductive pad comprises a flexible material configured and arranged to engage the heating plate and the heating element to eliminate air gaps and spaces between the heating plate and the heating element, thereby improving thermal conductivity.

[0080] Another aspect of this technology relates to a water reservoir including a conductive portion adapted for thermal bonding with a heating assembly, wherein the conductive portion comprises one of a metal plate, a non-metallic film, or a combination of metal plates and non-metallic films arranged in layers. In one example, the conductive portion may comprise a circular or non-circular shape.

[0081] Another aspect of this technology relates to including one or more circuit components in an air delivery pipe for identifying the type of air delivery pipe based on the characteristics of the circuit components.

[0082] Another aspect of this technology relates to a device for humidifying a breathable airflow. The device includes a water reservoir comprising a cavity configured to contain a volume of water, a water reservoir base configured and arranged to receive the water reservoir in an operating position, and an air delivery conduit configured to deliver a breathable airflow, already humidified in the water reservoir, to a patient interface. The air delivery conduit includes a base connector comprising a contact assembly. The contact assembly includes electrical contacts adapted to engage with corresponding electrical contacts disposed on the water reservoir base when the device is in the operating configuration. The contact assembly includes electrical characteristics that serve as identifiers for one or more parameters of the air delivery conduit or the patient interface.

[0083] Another aspect of this technology relates to a processing circuit configured to identify the type of air delivery duct based on measured characteristics of passive circuit components connected to an air delivery duct of a device for humidifying breathable airflow.

[0084] Another aspect of this technology relates to a processing circuit configured to identify the type of air delivery duct based on measurement characteristics of a circuit connected to an air delivery duct in a device for humidifying breathable airflow. The circuit characteristics include the resistance values ​​of one or more heating elements in the air delivery duct and / or the resistance values ​​of one or more sensors in the air delivery duct.

[0085] Another aspect of this technology relates to a processing circuit configured to identify the type of air delivery duct based on the resistance values ​​of a first resistor and a second resistor disposed in an air delivery duct connected to a device for humidifying breathable airflow. The first resistor is coupled to a first pair of contacts in the air delivery duct, and the second resistor is coupled to a second pair of contacts in the air delivery duct.

[0086] Another aspect of this technology relates to a sensor circuit comprising one or more filters coupled to a sensor circuit at least partially disposed in an air delivery pipe for sensing temperature changes in the air delivery pipe.

[0087] Another aspect of this technology relates to a low-pass filter coupled to a sensor circuit at least partially disposed in an air delivery pipe for sensing temperature changes within the air delivery pipe. The filter can be configured to filter the pulse frequency of a PWM signal applied to one or more heating elements in the air delivery pipe.

[0088] Another aspect of this technology relates to a sensor circuit comprising one or more low-pass filters coupled to a sensor circuit at least partially disposed in an air delivery pipe for sensing temperature changes in the air delivery pipe, wherein a sensing signal is periodically applied to the sensor circuit.

[0089] Another aspect of this technology relates to a first low-pass filter coupled to one end of a sensor included in an air delivery pipe and a second low-pass filter coupled to a second end of the sensor, wherein a sensing signal is applied to the sensor at predetermined intervals for sensing temperature changes in the air delivery pipe.

[0090] Another aspect of this technology relates to a first low-pass filter and a second low-pass filter, the first low-pass filter being coupled to a first output of a voltage divider network for detecting operating parameters of a sensor disposed in an air delivery pipe, and the second low-pass filter being coupled to a second output of the voltage divider network.

[0091] Another aspect of this technology relates to a device for providing a humidified and pressurized breathable gas supply to a patient interface. The device includes a flow generator configured to pressurize the breathable gas supply, a humidifier configured to provide water vapor to humidify the pressurized breathable gas supply, a heating element configured to connect to the humidifier to heat and deliver the humidified breathable gas supply to the patient interface, a sensor configured to measure the properties of the humidified breathable gas supply in the heating element, a controller configured to control the power supplied to the heating element and control the operation of the flow generator, and a set of low-pass filters coupled between the sensor and the controller and / or a set of low-pass filters coupled between the sensor and ground.

[0092] Another aspect of this technology relates to a device for humidifying a breathable airflow, comprising a water reservoir including a cavity configured to contain a volume of water, a water reservoir base configured and arranged to receive the water reservoir in an operating position, an air delivery tube configured to deliver a breathable airflow, already humidified in the water reservoir, to a patient interface, and an intermediate component removably and non-rotatably coupled to the water reservoir base. The intermediate component is configured to pneumatically connect the water reservoir to the air delivery tube. The intermediate component includes a one-piece construction made of a relatively rigid material, including an inlet end adapted for engagement with the water reservoir and an outlet end adapted for engagement with the air delivery tube. The air delivery tube includes a base connector configured and arranged to form a bayonet connection with the water reservoir base, the base connector mechanically and electrically connecting the air delivery tube to the water reservoir base.

[0093] Another aspect of this technology relates to a water reservoir for humidifying breathable airflow, including a reservoir base, a reservoir cover, and a hinge joint for hingedly engaging the reservoir cover to the reservoir base for hinged movement between an open position and a closed position. The hinge joint includes a pair of hinge pins, each configured to engage with a corresponding one of a pair of slots to achieve hinged movement. Each of the pair of hinge pins includes a cross-section of a circular principal portion.

[0094] Another aspect of this technology relates to a device for humidifying a breathable airflow. The device includes a water reservoir comprising a cavity configured to contain a volume of water, a water reservoir base configured and arranged to receive the water reservoir in an operating position, and a guide arrangement configured and arranged to guide the water reservoir into the operating position with the water reservoir base. The water reservoir includes a thermally conductive portion. The water reservoir base includes a heating assembly adapted to thermally engage with the thermally conductive portion of the water reservoir in the operating position to allow heat transfer from the heating assembly to the volume of water. The guide arrangement includes guide rails on each side of the water reservoir and guide slots on each side of the water reservoir base, each guide rail configured to engage with a corresponding guide slot. The guide arrangement also includes one or more offset edges or tabs disposed at the leading edge of the water reservoir, the offset edges or tabs being configured to engage below a corresponding adjacent edge of the water reservoir base when the water reservoir reaches the operating position. This engagement biases the front of the water reservoir downwards and locks it in place to prevent it from moving upwards.

[0095] Another aspect of this technology relates to a device for humidifying a breathable airflow. The device includes a water reservoir comprising a cavity configured to hold a volume of water, and a water reservoir base configured and arranged to receive the water reservoir in an operating position. The water reservoir includes a thermally conductive portion, and the water reservoir base includes a heating assembly adapted to thermally engage with the thermally conductive portion of the water reservoir in the operating position to allow heat transfer from the heating assembly to the volume of water. The heating assembly includes a heating plate with a base surface for thermal contact with the thermally conductive portion of the water reservoir, and a spring-loaded seal and / or support member to resiliently suspend the heating plate within the water reservoir base. The spring-loaded seal and / or support member includes one or more hollow tubes, each of which has an axis substantially perpendicular to the base surface of the heating plate.

[0096] Another aspect of this technology relates to a device for humidifying a breathable airflow. The device includes a water reservoir comprising a cavity configured to contain a volume of water, a water reservoir base configured and arranged to receive the water reservoir in an operating position, an air delivery tube configured to deliver a breathable airflow, already humidified in the water reservoir, to a patient interface, and an intermediate component arranged to be removably and non-rotatably coupled to the water reservoir base and the air delivery tube. The intermediate component is configured to pneumatically connect the air delivery tube to the water reservoir when in the operating configuration.

[0097] Another aspect of this technology relates to a water reservoir for humidifying breathable airflow, comprising a water reservoir base including a cavity configured to contain a volume of water. The reservoir base includes a body and a thermally conductive portion disposed within the body. The thermally conductive portion may include a thin film. The thin film comprises a non-metallic material and has a wall thickness of less than about 1 mm. The body comprises a plastic material, and the thin film includes a non-final form in which it is embedded into the body. After the thin film is embedded in the body, the thin film is formed into its final form (e.g., by stamping, vacuum forming, or thermo-vacuum forming).

[0098] The methods, systems, apparatuses, and devices described herein can be implemented to improve the functionality of processors (e.g., processors in dedicated computers, respiratory monitors, and / or respiratory therapy devices). Furthermore, the described methods, systems, apparatuses, and devices can provide improvements in the field of automated management, monitoring, and / or treatment of respiratory conditions, including, for example, sleep-disordered breathing.

[0099] Of course, some of these aspects can form sub-aspects of this technology. Sub-aspects and / or aspects of the aspects can be combined in various ways and also constitute other aspects or sub-aspects of this technology.

[0100] Other features of the present technology will become apparent from the information contained in the following detailed description, abstract, drawings and claims. Attached Figure Description

[0101] This technology is illustrated by way of example and not limitation in the figures, and similar reference numerals in the figures refer to similar elements, including:

[0102] 4.1 Treatment System

[0103] Figure 1A A system is shown in which a patient 1000 wearing a patient interface 3000 via a nose pillow receives a positive-pressure air supply from an RPT device 4000. The air from the RPT device 4000 is humidified in a humidifier 5000 and delivered to the patient 1000 along an air circuit 4170. A bed companion 1100 is also shown. The patient sleeps in a supine position.

[0104] Figure 1B A system is shown in which a patient 1000 wearing a patient interface 3000 in the form of a nasal mask receives a positive pressure air supply from an RPT device 4000. The air from the RPT device is humidified in a humidifier 5000 and delivered to the patient 1000 along an air circuit 4170.

[0105] Figure 1C A system is shown in which a patient 1000 wearing a patient interface 3000 in a full-face mask receives a positive-pressure air supply from an RPT device 4000. The air from the RPT device is humidified in a humidifier 5000 and delivered to the patient 1000 along an air circuit 4170. The patient sleeps in a side-lying position.

[0106] 4.2 Respiratory System and Facial Anatomy

[0107] Figure 2A A schematic diagram of the human respiratory system is shown, including the nasal cavity and oral cavity, larynx, vocal cords, esophagus, trachea, bronchi, lungs, alveolar sacs, heart, and diaphragm.

[0108] Figure 2B This diagram shows a view of the human upper airway, including the nasal cavity, nasal bones, external nasal cartilages, greater alar cartilages, nostrils, upper lip, lower lip, larynx, hard palate, soft palate, oropharynx, tongue, epiglottis, vocal cords, esophagus, and trachea.

[0109] 4.3 Patient Interface

[0110] Figure 3A A patient interface in the form of a nasal mask according to the present technology is shown.

[0111] Figure 3BA schematic diagram of a cross-section of the structure at a point is shown. The outward normal at that point is indicated. The curvature at that point has a positive sign, and when... Figure 3C The curvature amplitude shown has a relatively large amplitude compared to that shown.

[0112] Figure 3C A schematic diagram of a cross-section of the structure at a point is shown. The outward normal at that point is indicated. The curvature at that point has a positive sign, and when... Figure 3B The curvature amplitude shown has a relatively small amplitude compared to that shown.

[0113] Figure 3D A schematic diagram of a cross-section of the structure at a single point is shown. The outward normal at that point is indicated. The curvature at that point has a zero value.

[0114] Figure 3E A schematic diagram of a cross-section of the structure at a point is shown. The outward normal at that point is indicated. The curvature at that point has a negative sign, and when... Figure 3F The curvature amplitude shown has a relatively small amplitude compared to that shown.

[0115] Figure 3F A schematic diagram of a cross-section of the structure at a point is shown. The outward normal at that point is indicated. The curvature at that point has a negative sign, and when... Figure 3E The curvature amplitude shown has a relatively large amplitude compared to that shown.

[0116] Figure 3G The surface of the structure is shown, in which a one-dimensional hole is present. The planar curve shown forms the boundary of the one-dimensional hole.

[0117] Figure 3H It shows crossing Figure 3G The cross-section of the structure. The surface shown defines... Figure 3G Two-dimensional holes in the structure.

[0118] Figure 3I It shows Figure 3G A perspective view of the structure, including two-dimensional and one-dimensional holes. Also shown is the definition of... Figure 3G The surface of a two-dimensional hole in a structure.

[0119] 4.4 Respiratory waveform

[0120] Figure 4 The diagram shows a typical breathing waveform of a person during sleep.

[0121] 4.5RPT unit and humidifier

[0122] Figure 5A An exploded perspective view of one form of RPT device 4000 according to the present technology is shown.

[0123] Figure 5B A perspective view of one form of RPT device 4000 according to the present technology is shown. The RPT device 4000 includes an exhaust mask having a silencer 4124.

[0124] Figure 5C A perspective view of an RPT device 4000 having an integrated humidifier 5000 according to the present technology is shown. The integrated humidifier 5000 includes a water reservoir 5110.

[0125] Figure 5D This is a schematic diagram of the pneumatic path of one form of RPT device according to this technology. The upstream and downstream directions are indicated by reference to the blower and patient interface. The blower is defined as being upstream of the patient interface, and the patient interface is defined as being downstream of the blower, regardless of the actual flow direction at any given moment. Items within the pneumatic path between the blower and the patient interface are located downstream of the blower and upstream of the patient interface.

[0126] Figure 5E This is a schematic diagram of the electrical components of one form of RPT device according to the present technology.

[0127] Figure 5F This is a schematic diagram of an algorithm implemented in one form of RPT device according to the present technology.

[0128] Figure 5G A schematic diagram of one form of humidifier according to the present technology is shown.

[0129] Figure 6A This is a perspective view of an integrated RPT device including a water storage tank and a humidifier, according to an example of the present technology.

[0130] Figure 6B yes Figure 6A A perspective view of the integrated RPT unit and humidifier, with the water reservoir removed from the reservoir base.

[0131] Figure 7 This is a perspective view of a pneumatic block according to an example of this technology.

[0132] Figure 8A This is an example based on this technology. Figure 6A Side view of the integrated RPT unit and humidifier.

[0133] Figure 8B It is along Figure 8A The line 8B-8B cut Figure 8A Cross-sectional view of the integrated RPT device and humidifier.

[0134] Figure 8C yes Figure 8B The front view of the cross-sectional view shown.

[0135] Figure 8D It is along Figure 8A The line cut by 8D-8D Figure 8A Cross-sectional view of the integrated RPT device and humidifier.

[0136] Figure 9 This is an exploded view of a water storage device including a circular metal plate, according to an example of the present technology.

[0137] Figure 10A This is a top perspective view of the base of a humidifier reservoir, including a rectangular metal plate, according to an example of the present technology.

[0138] Figure 10B yes Figure 10A Bottom perspective view of the base of the storage device.

[0139] Figure 10C yes Figure 10A A top view of the base of the storage container.

[0140] Figure 10D yes Figure 10A A side view of the base of the storage device.

[0141] Figure 10E yes Figure 10A Bottom view of the base of the storage unit.

[0142] Figure 10F This is based on an example of the technology. Figure 10C A cross-sectional view of the base of the reservoir taken from line 10F-10F.

[0143] Figure 10G yes Figure 10F An enlarged view of a portion of the base of the storage device.

[0144] Figure 11A This is a top perspective view of the base of a humidifier reservoir including a circular metal plate, according to an example of the present technology.

[0145] Figure 11B This is based on an example of the technology. Figure 11A A cross-sectional view of the base of the storage device taken by line 11B-11B.

[0146] Figure 11C yes Figure 11B An enlarged view of a portion of the base of the storage device.

[0147] Figure 12AThis is a top perspective view of the reservoir base of a humidifier reservoir, including a rectangular metal plate stretched deeper, according to an example of the present technology.

[0148] Figure 12B This is based on an example of the technology. Figure 12A A cross-sectional view of the base of the reservoir taken by line 12B-12B.

[0149] Figure 12C yes Figure 12B An enlarged view of a portion of the base of the storage device.

[0150] Figure 13A This is a top perspective view of the base of a humidifier reservoir including a rectangular non-metallic film, according to an example of the present technology.

[0151] Figure 13B This is based on an example of the technology. Figure 13A A cross-sectional view of the base of the reservoir taken from line 13B-13B.

[0152] Figure 13C yes Figure 13B An enlarged view of a portion of the base of the storage device.

[0153] Figure 14A This is a top perspective view of the base of a humidifier reservoir including a circular non-metallic film, according to an example of the present technology.

[0154] Figure 14B This is based on an example of the technology. Figure 14A A cross-sectional view of the base of the reservoir taken from line 14B-14B.

[0155] Figure 14C yes Figure 14B An enlarged view of a portion of the base of the storage device.

[0156] Figure 15A This is a top perspective view of the reservoir base of a humidifier reservoir according to an example of the present technology, the reservoir base comprising a layered arrangement of a combination of rectangular metal plates and non-metallic films.

[0157] Figure 15B This is based on an example of the technology. Figure 15A A cross-sectional view of the base of the reservoir taken from line 15B-15B.

[0158] Figure 15C yes Figure 15B An enlarged view of a portion of the base of the storage device.

[0159] Figure 16AThis is a top perspective view of the reservoir base of a humidifier reservoir according to an example of the present technology, the reservoir base comprising a layered arrangement of a combination of circular metal plates and non-metallic films.

[0160] Figure 16B This is based on an example of the technology. Figure 16A A cross-sectional view of the base of the reservoir taken from line 16B-16B.

[0161] Figure 16C yes Figure 16B An enlarged view of a portion of the base of the storage device.

[0162] Figure 17A This is a top perspective view of the reservoir base of a humidifier reservoir according to an example of the present technology, the reservoir base comprising a layered arrangement of a combination of a rectangular metal plate stretched deeper and a non-metallic film.

[0163] Figure 17B This is based on an example of the technology. Figure 17A A cross-sectional view of the base of the reservoir taken from line 17B-17B.

[0164] Figure 17C yes Figure 17B An enlarged view of a portion of the base of the storage device.

[0165] Figure 18A This is a perspective view of a water storage device according to an example of this technology.

[0166] Figure 18B yes Figure 18A A top view of the water storage tank.

[0167] Figure 19A This is a top view of a water storage device according to an example of the present technology.

[0168] Figure 19B yes Figure 19A A side view of the water storage tank.

[0169] Figure 19C This is based on an example of the technology. Figure 19A The cross-sectional view of the water reservoir taken from line 19C-19C shows the arrangement of the inlet and outlet pipes.

[0170] Figure 19D This is based on an example of the technology. Figure 19B The cross-sectional view of the water reservoir taken by line 19D-19D shows the arrangement of the inlet and outlet pipes.

[0171] Figure 19E It is along Figure 19AThe cross-sectional view of the water reservoir taken by line 19E-19E shows the arrangement of the inlet and outlet pipes according to an example of the present technology.

[0172] Figure 19F This is based on an example of the technology. Figure 19A The cross-sectional view of the water reservoir taken from line 19F-19F shows the arrangement of the inlet and outlet pipes.

[0173] Figure 19G This is based on an example of the technology. Figure 19A The cross-sectional view of the water reservoir taken from line 19G-19G shows the arrangement of the inlet and outlet pipes, with the water reservoir rotated 180 degrees to show the backflow protection provided by the arrangement of the inlet and outlet pipes.

[0174] Figure 19H-1 This is a top perspective view of a removable outlet pipe arrangement for a water storage tank, according to an example of the present technology.

[0175] Figure 19H-2 yes Figure 19H-1 Bottom perspective view of the removable outlet pipe arrangement.

[0176] Figure 19I This is a perspective view of a removable inlet and outlet pipe arrangement for a water storage tank, according to an example of the present technology.

[0177] Figure 20A This is a perspective view showing a reservoir base and an air delivery pipe according to an example of the present technology.

[0178] Figure 20B This is a cross-sectional perspective view showing the base outlet of a reservoir base according to an example of the present technology.

[0179] Figure 20C This is a sectional front view showing the base outlet of a reservoir base according to an example of the present technology.

[0180] Figure 20D This is a perspective view showing a reservoir base and an air delivery pipe connected to the base outlet of the reservoir base, according to an example of the present technology.

[0181] Figure 20E This is another perspective view showing a reservoir base and an air delivery pipe connected to the base outlet of the reservoir base, according to an example of the present technology.

[0182] Figure 20F This is another perspective view showing a reservoir base and an air delivery pipe connected to the base outlet of the reservoir base, according to an example of the present technology.

[0183] Figure 20G This illustrates a reservoir base according to an example of the present technology and an air delivery pipe connected to the base outlet of the reservoir base. Figure 20F A cross-sectional view taken from the line 20G-20G.

[0184] Figure 20H This is another perspective view showing a reservoir base and an air delivery pipe connected to the base outlet of the reservoir base, according to an example of the present technology.

[0185] Figure 20I This is an enlarged perspective view showing a reservoir base and an air delivery pipe connected to the base outlet of the reservoir base, according to an example of the present technology.

[0186] Figure 20J This is a perspective view showing an air delivery pipe according to an example of the present technology and its electrical connection with a contact assembly at the base outlet of a reservoir base.

[0187] Figure 20K This is an enlarged sectional perspective view showing a reservoir base and an air delivery pipe connected to the base outlet of the reservoir base, according to an example of the present technology.

[0188] Figure 20L This is an enlarged sectional perspective view showing a reservoir base and an air delivery pipe separated from the base outlet of the reservoir base, according to an example of the present technology.

[0189] Figure 20M This is a cross-sectional view showing a reservoir base and an air delivery pipe connected to the base outlet of the reservoir base, according to an example of the present technology.

[0190] Figure 20N yes Figure 20M An enlarged view of the reservoir base and a portion of the air delivery pipe.

[0191] Figure 21 This is a schematic diagram showing a reservoir base with an air delivery pipe and a water reservoir connected to the reservoir base, according to an example of the present technology.

[0192] Figure 22A This is a perspective view showing an air delivery pipe connected to a water reservoir according to an example of the present technology.

[0193] Figure 22B yes Figure 22A Another perspective view of the air delivery pipes and water storage tank.

[0194] Figure 22C yes Figure 22A A top view of the air delivery pipes and water storage tank.

[0195] Figure 23A This is a perspective view showing a base connector for an air delivery pipe according to an example of the present technology.

[0196] Figure 23B yes Figure 23A A top view of the air delivery pipe.

[0197] Figure 24A This is a perspective view showing a base connector for an air delivery pipe according to another example of the present technology.

[0198] Figure 24B yes Figure 24A Another perspective view of the air delivery pipe, without the overmolded gripper.

[0199] Figure 25A This is a perspective view of a reservoir base (shown in cross section) and a water reservoir, according to an example of the present technology.

[0200] Figure 25B yes Figure 25A A perspective view of the reservoir base and the water reservoir, showing the water reservoir inserted into the reservoir base.

[0201] Figure 26A yes Figure 25A A side view of the reservoir base and the water reservoir, showing the water reservoir inserted into the reservoir base.

[0202] Figure 26B yes Figure 25A A side view of the reservoir base and the water reservoir, showing the water reservoir inserted into the reservoir base.

[0203] Figure 27A yes Figure 25A A cross-sectional view of the reservoir base and the water reservoir, showing the water reservoir inserted into the reservoir base.

[0204] Figure 27B yes Figure 25A A cross-sectional view of the reservoir base and the water reservoir, showing the water reservoir inserted into the reservoir base.

[0205] Figure 28A This is a perspective view showing a reservoir base including a recessed heating element according to an example of the present technology.

[0206] Figure 28B This illustrates an example according to the present technology. Figure 28A A perspective view of the heating element of the storage tank base.

[0207] Figure 28C It shows Figure 28A An enlarged cross-sectional view of the reservoir base and the recessed heating element.

[0208] Figure 29 This is a bottom perspective view of a water storage tank according to an example of this technology.

[0209] Figure 30 This is a side view of a reservoir base and a water reservoir, according to another example of the present technology, showing the water reservoir being inserted into the reservoir base.

[0210] Figure 31 yes Figure 30 A side view of the reservoir base and the water reservoir, showing the water reservoir inserted into the reservoir base.

[0211] Figure 32A yes Figure 30 A cross-sectional view of the reservoir base and the water reservoir, showing the water reservoir inserted into the reservoir base.

[0212] Figure 32B yes Figure 30 A cross-sectional view of the reservoir base and the water reservoir, showing the water reservoir inserted into the reservoir base.

[0213] Figure 33A This is a cross-sectional view showing a latch for a water storage device according to an example of the present technology.

[0214] Figure 33B This illustrates an example according to the present technology. Figure 33A A cross-sectional view of the latch engaging with the reservoir base.

[0215] Figure 33C It shows Figure 33A Another cross-sectional view of the latch.

[0216] Figure 33D It shows Figure 33A Another cross-sectional view of the latch.

[0217] Figure 33E It shows Figure 33A A perspective view of the latch.

[0218] Figure 33F It shows Figure 33A Another perspective view of the latch.

[0219] Figure 33G This is a perspective view showing a recess in a water reservoir for receiving a latch, according to an example of the present technology.

[0220] Figure 34A This is a cross-sectional view showing a heating assembly for a reservoir base according to an example of the present technology.

[0221] Figure 34B yes Figure 34A An exploded view of the heating components.

[0222] Figure 34C yes Figure 34A Another cross-sectional view of the heating assembly.

[0223] Figure 35A A schematic connection of a base and tube according to this technology is shown.

[0224] Figure 35B A circuit diagram showing one form of base and tube connection according to the present technology is shown.

[0225] Figure 36 A schematic connection of a base and tube according to this technology is shown.

[0226] Figure 37 The resistance changes of exemplary tube NTC sensors for 100k and 10k thermistors are shown at different temperatures.

[0227] Figure 38 A schematic connection of the base and tube according to another form of the present technology is shown.

[0228] Figure 39 A schematic connection of the base and tube according to another form of the present technology is shown.

[0229] Figure 40 A tube with a four-wire circuit coupled to a base is shown in one form according to the present technology.

[0230] Figure 41 An exemplary signal diagram is shown, illustrating a PWM signal that can be applied to a heating element and portions of the PWM sensing signal that can be observed in a sensing circuit.

[0231] Figure 42 An exemplary voltage divider network including a low-pass filter is shown in one form according to the present technology.

[0232] Figure 43 This is a perspective view showing a reservoir base, intermediate component, and air delivery pipe according to an example of the present technology, the air delivery pipe being oriented to engage with the intermediate component and a locking and contact assembly disposed on the reservoir base.

[0233] Figure 44 It shows Figure 43 A perspective view of the reservoir base and the air delivery pipe, the air delivery pipe engaging with a locking and contact assembly located on the reservoir base in an unlocked engagement position.

[0234] Figure 45 It shows Figure 43 A perspective view of the reservoir base and the air delivery pipe, the air delivery pipe engaging with a locking and contact assembly located on the reservoir base in the locked position.

[0235] Figure 46 It shows Figure 43 A perspective view of the reservoir base, intermediate components, and air delivery pipes.

[0236] Figure 47 It shows Figure 43 Exploded view of the reservoir base, intermediate components, air delivery pipe, and locking and contact components of the reservoir base.

[0237] Figure 48 It shows Figure 43 Another exploded view of the reservoir base, intermediate components, air delivery pipe, and locking and contact components of the reservoir base.

[0238] Figure 49 It shows Figure 43 Exploded view of the reservoir base and its locking and contact components, intermediate parts and air delivery pipes.

[0239] Figure 50 yes Figure 43 Enlarged front perspective view of the storage base.

[0240] Figure 51 It shows the setting in Figure 43 Enlarged perspective view of the locking and contact components of the storage base.

[0241] Figure 52 It shows the setting in Figure 43 Another enlarged perspective view of the locking and contact components of the storage base.

[0242] Figure 53 This is a rear perspective view showing an intermediate component according to an example of the present technology.

[0243] Figure 54 yes Figure 53 Front view of the middle component.

[0244] Figure 55 yes Figure 53 A top view of the middle component.

[0245] Figure 56 yes Figure 53 An exploded view of the intermediate components.

[0246] Figure 57 It shows the use of Figure 43 Enlarged front perspective view of the locking and contact components and intermediate parts of the storage base.

[0247] Figure 58 yes Figure 57 Front view of the locking and contact components and intermediate parts.

[0248] Figure 59 This is a perspective view showing a locking and contact assembly for a reservoir base according to an example of the present technology.

[0249] Figure 60 yes Figure 59 An exploded view of the locking and contact components.

[0250] Figure 61 yes Figure 59 Another exploded view of the locking and contact components.

[0251] Figure 62 yes Figure 59 A perspective view of the locking and contact components, where the cover has been removed.

[0252] Figure 63 yes Figure 59 The front view of the locking and contact components.

[0253] Figure 64 This is a perspective view of a base connector for an air delivery pipe according to an example of the present technology.

[0254] Figure 65 yes Figure 64 Front view of the base connector.

[0255] Figure 66 Is it through Figure 65 The cross-sectional view of line 66-66.

[0256] Figure 67 Is it through Figure 65 The cross-sectional view of line 67-67.

[0257] Figure 68 yes Figure 64 Exploded view of the base connector.

[0258] Figure 69 This is a front view showing the engagement of a base connector of an air delivery pipe according to an example of the present technology with an intermediate component and a locking and contact assembly disposed on a reservoir base, with the base connector in an unlocked engaged position.

[0259] Figure 70 Is with Figure 69 The associated cross-sectional view shows the base connector in the unlocked engagement position.

[0260] Figure 71 Is with Figure 69The related top view shows the base connector in the unlocked engagement position.

[0261] Figure 72 Is with Figure 69 The associated cross-sectional view shows the base connector in the unlocked engagement position.

[0262] Figure 73 This is a front view showing the engagement of a base connector of an air delivery pipe according to an example of the present technology with an intermediate component and a locking and contact assembly disposed on a reservoir base, with the base connector in the locked position.

[0263] Figure 74 Is with Figure 73 The relevant cross-sectional view shows the base connector in the locked position.

[0264] Figure 75 Is with Figure 73 The related top view shows the base connector in the locked position.

[0265] Figure 76 Is with Figure 73 The relevant cross-sectional view shows the base connector in the locked position.

[0266] Figure 77 Is with Figure 73 The related side view shows the base connector in the locked position.

[0267] Figure 78 Is with Figure 73 The relevant cross-sectional view shows the base connector in the locked position.

[0268] Figure 79 This is a perspective view of an integrated RPT device and humidifier according to an example of the present technology, wherein a water reservoir is inserted into a reservoir base.

[0269] Figure 80 yes Figure 79 A perspective view of the integrated RPT unit and humidifier, with the water reservoir removed from the reservoir base.

[0270] Figure 81 yes Figure 79 Another perspective view of the integrated RPT unit and humidifier, with the water reservoir removed from the reservoir base.

[0271] Figure 82 This is a top perspective view of a water reservoir according to an example of the present technology, with the water reservoir in the closed position.

[0272] Figure 83 yes Figure 82Bottom perspective view of the water storage tank.

[0273] Figure 84 It is in the open position. Figure 82 Top perspective view of the water storage tank.

[0274] Figure 85 yes Figure 82 An exploded view of the lid of the water storage tank.

[0275] Figure 86 It shows Figure 82 Exploded view of the cover and base of the water storage tank.

[0276] Figure 87 It shows Figure 86 A magnified view of a portion of the cover.

[0277] Figure 88 It shows Figure 86 A magnified view of a portion of the base.

[0278] Figure 89 It is in the open position. Figure 82 A side view of the water storage tank.

[0279] Figure 90 It shows Figure 89 A cross-sectional view of a portion of a water storage tank.

[0280] Figure 91 It is in the closed position. Figure 82 A side view of the water storage tank.

[0281] Figure 92 It shows Figure 91 A cross-sectional view of a portion of a water storage tank.

[0282] Figure 93 It shows Figure 91 Another cross-sectional view of a portion of the water storage tank.

[0283] Figure 94 yes Figure 82 A side view of a water reservoir, showing the assembly of the cover and base according to an example of the present technology.

[0284] Figure 95 It shows Figure 94 A cross-sectional view of a portion of a water storage tank.

[0285] Figure 96 yes Figure 82 A side view of a water reservoir, showing the initial stage of removing the cover from the base according to an example of the present technology.

[0286] Figure 97It shows Figure 96 A cross-sectional view of a portion of a water storage tank.

[0287] Figure 98 It is along Figure 79 The line cut off at 98-98 Figure 79 Cross-sectional view of the integrated RPT device and humidifier.

[0288] Figure 99 It shows Figure 98 An enlarged cross-sectional view of the integrated RPT unit and part of the humidifier.

[0289] Figure 100 It is along Figure 79 The line cut from 100-100 Figure 79 Cross-sectional view of the integrated RPT device and humidifier.

[0290] Figure 101 It shows Figure 100 An enlarged view of the integrated RPT unit and part of the humidifier.

[0291] Figure 102 It shows Figure 100 An enlarged view of the integrated RPT unit and another part of the humidifier.

[0292] Figure 103 This is an exploded view showing the heating assembly of a reservoir base according to an example of the present technology.

[0293] Figure 104 It shows the use of Figure 103 An exploded view of the support structure for the heating plate in the heating assembly.

[0294] Figure 105 It is along Figure 81 The cross-sectional view taken by line 105-105 shows a heating assembly according to an example of the present technology, wherein the water reservoir has been removed from the reservoir base.

[0295] Figure 106 It shows Figure 105 An enlarged cross-sectional view of a portion of the heating assembly.

[0296] Figure 107 yes Figure 98 An enlarged cross-sectional view of a portion of the image shows a heating assembly according to an example of the present technology, wherein a water reservoir is inserted into a reservoir base.

[0297] Figure 108 It shows Figure 107 An enlarged cross-sectional view of a portion of the heating assembly.

[0298] Figure 109 yes Figure 108 An enlarged cross-sectional view of a portion of the image shows drainage provided by a heating assembly according to an example of the present technology.

[0299] Figure 110 This is a perspective view showing a reservoir base, intermediate component, and air delivery pipe according to an example of the present technology, the air delivery pipe being oriented to engage with the intermediate component and a contact assembly disposed on the reservoir base.

[0300] Figure 111 It shows Figure 110 A perspective view of the reservoir base, intermediate components, and air delivery pipe, with the air delivery pipe fully engaged with the intermediate components.

[0301] Figure 112 It shows Figure 110 A perspective view of the intermediate component joining the storage base.

[0302] Figure 113 It shows Figure 110 Exploded view of the reservoir base, intermediate components, and air delivery pipes.

[0303] Figure 114 It shows Figure 110 A perspective view of the base outlet of the storage base, with the intermediate component removed.

[0304] Figure 115A It shows the setting in Figure 110 A perspective view of the middle part and contact assembly of the storage base.

[0305] Figure 115B It is along Figure 112 A cross-sectional view taken by lines 115B-115B shows the connection between the intermediate component and the reservoir base according to an example of the present technology.

[0306] Figure 115C1 , 115C2 And 115C3 is along Figure 110 A cross-sectional view taken from line 115C-115C shows the assembly sequence of the intermediate component and the reservoir base according to an example of the present technology.

[0307] Figure 115D It is along Figure 112 A cross-sectional view taken by line 115D-115D shows the connection between the intermediate component and the reservoir base according to an example of the present technology.

[0308] Figure 115E It is along Figure 115DA cross-sectional view taken along line 115E-115E shows the connection between the intermediate component and the reservoir base according to an example of the present technology.

[0309] Figure 116 This is a top perspective view of the middle component according to an example of this technology.

[0310] Figure 117 yes Figure 116 Bottom perspective view of the middle component.

[0311] Figure 118 yes Figure 116 Front view of the middle component.

[0312] Figure 119 yes Figure 116 A top view of the middle component.

[0313] Figure 120 yes Figure 116 An exploded view of the intermediate components.

[0314] Figure 121 It shows the setting in Figure 110 A perspective view of the contact assembly of the storage base, with the intermediate component removed.

[0315] Figure 122 yes Figure 121 Exploded view of the contact components.

[0316] Figure 123 This is a perspective view of a base connector for an air delivery pipe according to an example of the present technology.

[0317] Figure 124 yes Figure 123 Front view of the base connector.

[0318] Figure 125 Is it through Figure 124 A cross-sectional view of line 125-125.

[0319] Figure 126 yes Figure 123 Exploded view of the base connector.

[0320] Figure 127 This is a top view showing the engagement of the base connector of an air delivery pipe with an intermediate component according to an example of the present technology, with the base connector in the locked position.

[0321] Figure 128 Is with Figure 127 The relevant cross-sectional view shows the base connector in the locked position.

[0322] Figure 129This is a side view showing the engagement of a base connector of an air delivery pipe with an intermediate component and a contact assembly disposed on a reservoir base, according to an example of the present technology, with the base connector in a locked position.

[0323] Figure 130 Is with Figure 129 The relevant cross-sectional view shows the base connector in the locked position.

[0324] Figure 131 It is along Figure 79 The line 131-131 cut Figure 79 A cross-sectional view of the integrated RPT unit and the humidification section of the humidifier.

[0325] Figure 132 It shows Figure 131 An enlarged view of the integrated RPT unit and part of the humidifier.

[0326] Figure 133 It shows Figure 131 An enlarged view of the integrated RPT unit and another part of the humidifier.

[0327] Figure 134 yes Figure 82 An inverted bottom perspective view of the lid of a water reservoir.

[0328] Figure 135 It is along Figure 134 The line was cut at 135-135. Figure 134 An inverted cross-sectional view of the lid.

[0329] Figure 136 It is along Figure 134 The line 136-136 was cut off Figure 134 An inverted cross-sectional view of the lid. Detailed Implementation

[0330] Before describing this technology in further detail, it should be understood that this technology is not limited to the specific instances described herein, and the specific instances described herein may be modified. It should also be understood that the terminology used in this disclosure is for the purpose of describing the specific instances described herein only and is not intended to be limiting.

[0331] The following description is provided in relation to various instances that may share one or more common features and / or characteristics. It should be understood that one or more features of any instance may be combined with one or more features of another instance or other instances. In addition, in any instance, any single feature or combination of features may constitute another instance.

[0332] 5.1 Treatment

[0333] In one form, the technology includes a method for treating respiratory distress, the method comprising the step of applying positive pressure to the airway inlet of a patient 1000.

[0334] In some instances of this technique, positive pressure air is supplied to the patient’s nasal passages through one or both nostrils.

[0335] In some instances of this technology, mouth breathing is limited, restricted, or prevented.

[0336] 5.2 Treatment System

[0337] In one form, the technology includes a device or apparatus for treating respiratory disorders. This device or apparatus may include an RPT device 4000 for supplying pressurized air to a patient 1000 via an air circuit 4170 to a patient interface 3000, for example, see [link to relevant documentation]. Figures 1A to 1C .

[0338] 5.3 Patient Interface

[0339] Figure 3A A noninvasive patient interface 3000 according to one aspect of the present technology is shown, comprising the following functional aspects: a seal-forming structure 3100, an inflation chamber 3200, a positioning and stabilizing structure 3300, an air vent 3400, a connection port 3600 for connection to an air circuit 4170, and a forehead support 3700. In some forms, the functional aspects may be provided by one or more physical components. In some forms, a single physical component may provide one or more functional aspects. In use, the seal-forming structure 3100 is arranged around the inlet of the patient's airway to facilitate the supply of positively pressurized air to the airway.

[0340] If the patient interface cannot comfortably deliver a minimum level of positive pressure to the airway, the patient interface may not be suitable for respiratory pressure therapy.

[0341] According to one form of the present technology, a patient interface 3000 is constructed and arranged to supply air at a positive pressure of at least 6 cmH2O relative to the environment.

[0342] According to one form of the present technology, a patient interface 3000 is constructed and arranged to supply air at a positive pressure of at least 10 cmH2O relative to the environment.

[0343] According to one form of the present technology, a patient interface 3000 is constructed and arranged to supply air at a positive pressure of at least 20 cmH2O relative to the environment.

[0344] 5.4RPT device

[0345] Figure 5AAn exploded view of an RPT device 4000 according to one aspect of the present technology is shown. The RPT device 4000 may include mechanical, pneumatic, and / or electronic components and is configured to execute one or more algorithms. The RPT device 4000 may be configured to generate an airflow for delivery to a patient's airway, for example, for treating one or more respiratory conditions described elsewhere in this document.

[0346] In one embodiment, the RPT device 4000 is constructed and arranged to deliver an airflow in the range of -20 L / min to +150 L / min while maintaining a positive pressure of at least 6 cmH2O, or at least 10 cmH2O, or at least 20 cmH2O.

[0347] The RPT device 4000 may include a housing having one or more panels, such as a main panel 4010, a front panel 4012, and a side panel 4014. The RPT device 4000 may also include an exhaust mask with a silencer 4124, such as... Figure 5A and 5B As shown. The mask with silencer 4124 can be removable and can be replaced with water reservoir 5110 (see...). Figure 5C In this form, the RPT device 4000 can be considered to include an integrated humidifier 5000. Therefore, the RPT device 4000 can be used with or without humidification, depending on whether a water reservoir 5110 or an outlet mask with a silencer 4124 is attached. Preferably, the RPT device 4000 includes a chassis 4016 that supports one or more internal components of the RPT device 4000. In one form, the RPT device 4000 includes a pressure generator 4140 that can be housed in a pneumatic block 4020 connected to the chassis 4016.

[0348] Further instances and details of exemplary RPT devices are described in PCT Publication WO 2015 / 089582, which is incorporated herein by reference in its entirety.

[0349] The pneumatic path of the RPT device 4000 (e.g.) Figure 5D The device (shown) may include an inlet air filter 4112, an inlet silencer 4122, a pressure generator 4140 (preferably a blower 4142) capable of supplying air under positive pressure, and an outlet silencer 4124 (or a water reservoir 5110 if humidification is required). One or more converters 4270, such as pressure and flow sensors, may be included in the pneumatic path. The pneumatic path may also include an anti-backflow valve 4160 to prevent water from overflowing from the humidifier 5000 back to the electrical components of the RPT device 4000.

[0350] like Figure 5EAs shown, the RPT device 4000 may include a power supply 4210, one or more input devices 4220, a central controller 4230, a treatment device controller 4240, one or more protection circuits 4250, a memory 4260, a sensor / converter 4270, a data communication interface 4280, and one or more output devices 4290. Electrical components 4200 may be mounted on a single printed circuit board assembly (PCBA) 4202 (e.g., see...). Figure 5A In an alternative form, the RPT device 4000 may include more than one PCBA 4202.

[0351] 5.4.1 Mechanical and Pneumatic Components of the RPT Device

[0352] The RPT device may include one or more of the following components in an integral unit. In an alternative form, one or more of the following components may be configured as separate units.

[0353] 5.4.1.1 Air Filter

[0354] One form of RPT device according to the present technology may include an air filter 4110, or a plurality of air filters 4110.

[0355] In one configuration, the inlet air filter 4112 is positioned at the beginning of the pneumatic path upstream of the pressure generator 4140.

[0356] In one configuration, an outlet air filter 4114, such as an antibacterial filter, is positioned between the outlet of the pneumatic block 4020 and the patient interface 3000.

[0357] 5.4.1.2 Muffler

[0358] One form of RPT device according to the present technology may include a muffler 4120, or a plurality of mufflers 4120.

[0359] In one embodiment of this technology, the inlet silencer 4122 is positioned in the pneumatic path upstream of the pressure generator 4140.

[0360] In one embodiment of this technology, the outlet silencer 4124 is positioned in the pneumatic path between the pressure generator 4140 and the patient interface 3000.

[0361] 5.4.1.3 Pressure Generator

[0362] In one form of this technology, the pressure generator 4140 for generating a positive pressure airflow or air supply is a controllable blower 4142. For example, the blower 4142 may include a brushless DC motor 4144 having one or more impellers. The impellers may be located in a volute. The blower may deliver the air supply, for example, at a rate up to about 120 liters per minute and at a positive pressure ranging from about 4 cmH2O to about 20 cmH2O, or in other forms up to about 30 cmH2O. The blower may be as described in any of the following patents or patent applications, which are incorporated herein by reference in their entirety: U.S. Patent No. 7,866,944; U.S. Patent No. 8,638,014; U.S. Patent No. 8,636,479; and PCT Patent Application No. WO2013 / 020167.

[0363] The pressure generator 4140 is controlled by the treatment device controller 4240.

[0364] In other forms, the pressure generator 4140 may be a piston-driven pump, a pressure regulator connected to a high-pressure source (e.g., a compressed air reservoir), or a bellows.

[0365] 5.4.1.4 Converter

[0366] The transducer can be located inside or outside the RPT device. An external transducer can be positioned, for example, on or within an air circuit (e.g., a patient interface). An external transducer can be in the form of a non-contact sensor, such as a Doppler radar motion sensor that transmits or transfers data to the RPT device.

[0367] In one embodiment of this technology, one or more converters 4270 may be positioned upstream and / or downstream of pressure generator 4140. One or more converters 4270 may be configured and arranged to generate signals representing airflow properties (e.g., flow rate, pressure, or temperature at that point in the pneumatic path).

[0368] In one form of this technology, one or more converters 4270 may be positioned proximal to the patient interface 3000.

[0369] In one embodiment, the signal from converter 4270 can be filtered, for example, by low-pass filtering, high-pass filtering, or band-pass filtering.

[0370] 5.4.1.4.1 Flow Sensor

[0371] The flow sensor 4274 according to this technology can be based on a differential pressure converter, such as the SDP600 series differential pressure converter from SENSIRION.

[0372] In one configuration, a signal representing flow rate from flow sensor 4274 is received by central controller 4230.

[0373] 5.4.1.4.2 Pressure Sensor

[0374] The pressure sensor 4272 according to this technology is positioned in fluid communication with the pneumatic path. A suitable example of a pressure sensor is the converter from the HONEYWELL ASDX series. An alternative suitable pressure sensor is the converter from the GENERALELECTRIC NPA series.

[0375] In one configuration, the signal from pressure sensor 4272 is received by central controller 4230.

[0376] 5.4.1.4.3 Motor speed converter

[0377] In one embodiment of this technology, a motor speed converter 4276 is used to determine the rotational speed of the motor 4144 and / or the blower 4142. The motor speed signal from the motor speed converter 4276 can be provided to the treatment device controller 4240. The motor speed converter 4276 can be, for example, a speed sensor, such as a Hall effect sensor.

[0378] 5.4.1.5 Anti-overflow valve

[0379] In one embodiment of this technology, an anti-backflow valve 4160 is positioned between the humidifier 5000 and the pneumatic block 4020. The anti-backflow valve is constructed and arranged to reduce the risk of water flowing upstream from the humidifier 5000, for example, to the motor 4144.

[0380] 5.4.2 Electrical components of the RPT device

[0381] 5.4.2.1 Power Supply

[0382] The power supply 4210 can be located inside or outside the outer housing 4010 of the RPT device 4000.

[0383] In one embodiment of this technology, power supply 4210 supplies power only to RPT device 4000. In another embodiment of this technology, power supply 4210 supplies power to both RPT device 4000 and humidifier 5000.

[0384] 5.4.2.2 Input Device

[0385] In one form of this technology, the RPT device 4000 includes one or more input devices 4220 in the form of buttons, switches, or dials to allow personnel to interact with the device. The buttons, switches, or dials can be physical devices or software devices accessed via a touchscreen. In one form, the buttons, switches, or dials can be physically connected to an external housing 4010, or in another form, they can communicate wirelessly with a receiver electrically connected to a central controller 4230.

[0386] In one form, the input device 4220 may be configured and arranged to allow a person to select values ​​and / or menu options.

[0387] 5.4.2.3 Central Controller

[0388] In one form of this technology, the central controller 4230 is one or more processors adapted to control the RPT device 4000.

[0389] Suitable processors may include x86 Intel processors, based on those from ARM Holdings. Processors with an M-bit RISC CPU, such as the STM32 series microcontrollers from ST Microelectronics, are also suitable. In some alternative forms of this technology, processors with a 32-bit RISC CPU, such as the STR9 series microcontrollers from ST Microelectronics, or a 16-bit RISC CPU, such as the MSP430 series microcontrollers from Texas Instruments, are equally applicable.

[0390] In one form of this technology, the central controller 4230 is a dedicated electronic circuit.

[0391] In one form, the central controller 4230 is an application-specific integrated circuit (ASIC). In another form, the central controller 4230 includes discrete electronic components.

[0392] The central controller 4230 can be configured to receive input signals from one or more converters 4270, one or more input devices 4220, and humidifier 5000.

[0393] The central controller 4230 can be configured to provide output signals to one or more output devices 4290, treatment device controller 4240, data communication interface 4280 and humidifier 5000.

[0394] In some forms of this technology, the central controller 4230 is configured to implement one or more methods described herein, such as one or more algorithms 4300 represented as computer programs, which are stored in a non-transitory computer-readable storage medium, such as memory 4260. In some forms of this technology, the central controller 4230 may be integrated with the RPT device 4000. However, in some forms of this technology, some methods may be performed by a remotely located device. For example, a remotely located device may determine control settings for the ventilator or detect respiratory-related events by analyzing stored data, such as from any of the sensors described herein.

[0395] 5.4.2.4 Clock

[0396] RPT device 4000 may include a clock 4232 connected to central controller 4230.

[0397] 5.4.2.5 Treatment device controller

[0398] In one form of this technology, the treatment device controller 4240 is a treatment control module 4330, which forms part of an algorithm 4300 executed by the central controller 4230.

[0399] In one embodiment of this technology, the treatment device controller 4240 is a dedicated motor control integrated circuit. For example, in one embodiment, an MC33035 brushless DC motor controller manufactured by ONSEMI is used.

[0400] 5.4.2.6 Protection Circuit

[0401] One or more protection circuits 4250 according to the present technology may include electrical protection circuits, temperature and / or pressure safety circuits.

[0402] 5.4.2.7 Memory

[0403] According to one embodiment of the present technology, the RPT device 4000 includes a memory 4260, such as non-volatile memory. In some embodiments, the memory 4260 may include battery-powered static RAM. In some embodiments, the memory 4260 may include volatile RAM.

[0404] The memory 4260 may be located on PCBA 4202. The memory 4260 may be in the form of EEPROM or NAND flash memory.

[0405] Alternatively or alternatively, the RPT device 4000 includes a removable memory 4260, such as a memory card made according to the Secure Digital (SD) standard.

[0406] In one form of this technology, memory 4260 is used as a non-transitory computer-readable storage medium storing computer program instructions representing one or more methods described herein, such as one or more algorithms 4300.

[0407] 5.4.2.8 Data Communication System

[0408] In one embodiment of this technology, a data communication interface 4280 is provided and connected to a central controller 4230. The data communication interface 4280 may be connected to a remote external communication network 4282 and / or a local external communication network 4284. The remote external communication network 4282 may be connected to a remote external device 4286. The local external communication network 4284 may be connected to a local external device 4288.

[0409] In one embodiment, the data communication interface 4280 is part of the central controller 4230. In another embodiment, the data communication interface 4280 is separate from the central controller 4230 and may include an integrated circuit or a processor.

[0410] In one embodiment, the remote external communication network 4282 is the Internet. The data communication interface 4280 can connect to the Internet using wired communication (e.g., via Ethernet or fiber optic) or wireless protocols (e.g., CDMA, GSM, LTE).

[0411] In one form, the local external communication network 4284 utilizes one or more communication standards, such as Bluetooth or consumer infrared protocols.

[0412] In one form, the remote external device 4286 is one or more computers, such as a cluster of networked computers. In another form, the remote external device 4286 may be a virtual computer rather than a physical computer. In either case, such a remote external device 4286 can be accessed by appropriately authorized personnel (such as clinicians).

[0413] The local external device 4288 can be a personal computer, mobile phone, tablet, or remote control device.

[0414] 5.4.2.9 Includes optional display and alarm output devices.

[0415] The output device 4290 according to this technology can take the form of one or more of visual, audio, and tactile units. The visual display can be a liquid crystal display (LCD) or a light-emitting diode (LED) display.

[0416] 5.4.2.9.1 Display Driver

[0417] The display driver 4292 receives characters, symbols, or images as input for display on the display 4294 and converts them into commands that cause the display 4294 to display those characters, symbols, or images.

[0418] 5.4.2.9.2 Monitor

[0419] The display 4294 is configured to visually display characters, symbols, or images in response to commands received from the display driver 4292. For example, the display 4294 may be an eight-segment display, in which case the display driver 4292 converts each character or symbol (e.g., the number "0") into eight logic signals that indicate whether the eight corresponding segments will be activated to display a specific character or symbol.

[0420] 5.4.3 RPT Device Algorithm

[0421] As described above, in some forms of this technology, the central controller 4230 can be configured to implement one or more algorithms 4300 represented as computer programs, which are stored in a non-transitory computer-readable storage medium such as memory 4260. The algorithms 4300 are broadly grouped into groups called modules, see, for example, see... Figure 5F .

[0422] 5.4.3.1 Preprocessing Module

[0423] According to one form of the present technology, a preprocessing module 4310 receives a signal from a converter 4270 (e.g., a flow sensor 4274 or a pressure sensor 4272) as input and performs one or more processing steps to calculate one or more output values ​​that will be used as input to another module (e.g., a treatment engine module 4320).

[0424] In one form of this technology, the output values ​​include the interface or mask pressure Pm, the breathing flow rate Qr, and the leakage flow rate Ql.

[0425] In various forms of this technology, the preprocessing module 4310 includes one or more of the following algorithms: pressure compensation 4312, ventilation flow estimation 4314, leakage flow estimation 4316, and respiratory flow estimation 4318.

[0426] 5.4.3.1.1 Pressure Compensation

[0427] In one form of this technology, pressure compensation algorithm 4312 receives a signal indicating the pressure in the pneumatic path near the outlet of the pneumatic block as input. Pressure compensation algorithm 4312 estimates the pressure drop through air circuit 4170 and provides the estimated pressure Pm in patient interface 3000 as output.

[0428] 5.4.3.1.2 Ventilation flow rate estimation

[0429] In one form of this technology, the ventilation flow estimation algorithm 4314 receives the estimated pressure Pm in the patient interface 3000 as input and estimates the air ventilation flow Qv from the air vent 3400 in the patient interface 3000.

[0430] 5.4.3.1.3 Leakage Flow Estimation

[0431] In one form of this technology, the leakage flow estimation algorithm 4316 receives the total flow rate Qt and the ventilation flow rate Qv as inputs and provides an estimate of the leakage flow rate Ql as output. In another form, the leakage flow estimation algorithm estimates the leakage flow rate Ql by calculating the average of the difference between the total flow rate Qt and the ventilation flow rate Qv over a sufficiently long time period (e.g., about 10 seconds) that includes several respiratory cycles.

[0432] In one form, the leakage flow estimation algorithm 4316 receives the total flow rate Qt, ventilation flow rate Qv, and estimated pressure Pm from the patient interface 3000 as input, and provides the leakage flow rate Ql as output by calculating the leakage conductivity and determining the leakage flow rate Ql as a function of the leakage conductivity and pressure Pm. The leakage conductivity is calculated as the quotient of the low-pass filtered non-ventilation flow rate (equal to the difference between the total flow rate Qt and the ventilation flow rate Qv) and the square root of the low-pass filtered pressure Pm, where the low-pass filter time constant has a sufficiently long value to include several respiratory cycles, for example, approximately 10 seconds. The leakage flow rate Ql can be estimated as the product of the leakage conductivity and pressure Pm.

[0433] 5.4.3.1.4 Respiratory Flow Estimation

[0434] In one form of this technology, the respiratory flow estimation algorithm 4318 receives total flow rate Qt, ventilation flow rate Qv, and leakage flow rate Ql as inputs, and estimates the respiratory flow rate Qr of air flowing to the patient by subtracting the ventilation flow rate Qv and leakage flow rate Ql from the total flow rate Qt.

[0435] 5.4.3.2 Healing Engine Module

[0436] In one form of this technology, the treatment engine module 4320 receives one or more of the pressure Pm and the airflow rate Qr to the patient from the patient interface 3000 as inputs, and provides one or more treatment parameters as outputs.

[0437] In one form of this technique, the treatment parameter is the treatment pressure Pt.

[0438] In one form of this technique, the treatment parameters are one or more of pressure change, baseline pressure, and target ventilation.

[0439] In various forms, the treatment engine module 4320 includes one or more of the following algorithms: phase determination 4321, waveform determination 4322, ventilation determination 4323, inspiratory flow restriction determination 4324, apnea / insufficiency determination 4325, snoring determination 4326, airway patency determination 4327, target ventilation determination 4328, and treatment parameter determination 4329.

[0440] 5.4.3.2.1 Phase Determination

[0441] In one form of this technology, the RPT device has an uncertain phase of 4000.

[0442] In one form of this technology, the phase determination algorithm 4321 receives a signal indicating respiratory flow Qr as input and provides the phase Φ of the patient's current respiratory cycle as output.

[0443] In some forms known as discrete phase determination, the phase output Φ is a discrete variable. One implementation of discrete phase determination provides a dual-valued phase output Φ with either an inspiratory or expiratory value, for example, values ​​of 0 and 0.5 revolutions, respectively, when the start of spontaneous inspiration and expiration is detected, respectively. The RPT device 4000, which performs "triggering" and "cycling," effectively executes discrete phase determination because the trigger and cycling points are the moments of phase change from expiration to inspiration and from inspiration to expiration, respectively. In one implementation of dual-valued phase determination, the phase output Φ is determined to have a discrete value of 0 (thus "triggering" the RPT device 4000) when the value of the respiratory flow Qr exceeds a positive threshold, and the phase output Φ is determined to have a discrete value of 0.5 revolutions (thus "cycling" the RPT device 4000) when the value of the respiratory flow Qr is more negative than a negative threshold. The inspiratory time Ti and expiratory time Te can be estimated as typical values ​​of the time spent when phase Φ is equal to 0 (indicating inspiration) and 0.5 (indicating expiration) over many respiratory cycles.

[0444] Another implementation of discrete phase determination provides a three-valued phase output Φ, the value of which is one of the following: inhalation, mid-inhalation pause, and exhalation.

[0445] In other forms known as continuous phase determination, the phase output Φ is a continuous variable, such as varying from 0 to 1 revolution or 0 to 2π radians. The RPT device 4000 performing continuous phase determination can be triggered and cycled when the continuous phase reaches 0 and 0.5 revolutions, respectively. In one implementation of continuous phase determination, fuzzy logic analysis of the respiratory flow rate Qr is used to determine the continuous phase value Φ. The continuous value of the phase determined in this implementation is often referred to as the "fuzzy phase." In one implementation of the fuzzy phase determination algorithm 4321, the following rule is applied to the respiratory flow rate Qr:

[0446] 1. If the respiratory flow is zero and increases rapidly, the phase is 0 revolutions.

[0447] 2. If the respiratory flow is large, positive, and stable, the phase is 0.25 revolutions.

[0448] 3. If the respiratory flow is zero and decreases rapidly, the phase is 0.5 revolutions.

[0449] 4. If the respiratory flow is significantly negative and stable, the phase is 0.75 revolutions.

[0450] 5. If the respiratory flow is zero and stable and the absolute value of the 5-second low-pass filter for the respiratory flow is large, then the phase is 0.9 revolutions.

[0451] 6. If the respiratory flow is positive and it is the expiratory phase, the phase is 0 revolutions.

[0452] 7. If the respiratory flow is negative and it is the inspiratory phase, the phase is 0.5 revolutions.

[0453] 8. If the absolute value of the 5-second low-pass filter for respiratory flow is large, the phase increases at a steady rate equal to the patient's respiratory rate, and the low-pass filter has a time constant of 20 seconds.

[0454] The output of each rule can be represented as a vector, with its phase being the result of the rule and its amplitude being the degree of ambiguity of the rule being true. The degree of ambiguity for respiratory flow such as "large" or "stable" is determined using an appropriate membership function. The results of the rules, represented as vectors, are then combined using certain functions, such as taking the centroid. In such combinations, the rules can be weighted equally or differently.

[0455] In another implementation of continuous phase determination, as described above, the phase Φ is first estimated discretely from the respiratory flow rate Qr, and the inspiratory time Ti and expiratory time Te are also estimated in the same way. The continuous phase Φ at any given time can be determined as half the proportion of the inspiratory time Ti that has elapsed since the previous trigger moment, or 0.5 revolutions plus half the proportion of the expiratory time Te that has elapsed since the previous cycle moment (the more recent moment).

[0456] 5.4.3.2.2 Waveform Determination

[0457] In one form of this technology, the treatment parameter determination algorithm 4329 provides an approximately constant treatment pressure throughout the patient's respiratory cycle.

[0458] In other forms of this technology, the treatment control module 4330 controls the pressure generator 4140 to provide treatment pressure Pt, which varies according to the waveform template Π(Φ) as a function of the phase Φ of the patient's respiratory cycle.

[0459] In one form of this technology, waveform determination algorithm 4322 provides a waveform template Π(Φ) with a value in the range [0,1] on the domain of the phase value Φ provided by phase determination algorithm 4321 for use by treatment parameter determination algorithm 4329.

[0460] In one form, suitable for discrete or continuous phase values, the waveform template Π(Φ) is a square wave template with a value of 1 for phase values ​​up to and including 0.5 revolutions and a value of 0 for phase values ​​above 0.5 revolutions. In another form, suitable for continuous phase values, the waveform template Π(Φ) includes two smooth curve portions: for phase values ​​up to 0.5 revolutions, the smooth curve (e.g., raised cosine) rises from 0 to 1, while for phase values ​​above 0.5 revolutions, the smooth curve (e.g., exponential) falls from 1 to 0. In yet another form, suitable for continuous phase values, the waveform template Π(Φ) is based on a square wave, but has a smooth rise from 0 to 1 for phase values ​​in a "rise time" of at most to less than 0.5 revolutions, and a smooth fall from 1 to 0 for phase values ​​in a "fall time" after 0.5 revolutions, where the "fall time" is less than 0.5 revolutions.

[0461] In some forms of this technology, the waveform determination algorithm 4322 selects a waveform template Π(Φ) from a waveform template library based on the settings of the RPT device. Each waveform template Π(Φ) in the library can be provided as a value lookup table Π for the phase value Φ. In other forms, the waveform determination algorithm 4322 uses a predetermined function form, which may be parameterized by one or more parameters (e.g., the time constant of the exponential curve portion), to calculate the "running" waveform template Π(Φ). The parameters of the function form can be predetermined or depend on the current state of the patient 1000.

[0462] In some forms of this technique, applicable to discrete two-valued phases of inhalation (Φ = 0 rpm) or exhalation (Φ = 0.5 rpm), waveform determination algorithm 4322 calculates a “running” waveform template Π as a function of the discrete phase Φ and the time t measured since the most recent trigger moment. In one such form, waveform determination algorithm 4322 calculates the waveform template Π(Φ,t) for two parts (inhalation and exhalation) as follows:

[0463]

[0464] Among them Π i (t) and Π e (t) represents the inhalation and exhalation portions of the waveform template Π(Φ,t). In one such form, the inhalation portion Π of the waveform template... i (t) is a smooth rise from 0 to 1 parameterized by the rise time, representing the expiratory portion of the waveform template. e (t) is a smooth drop from 1 to 0 parameterized by the descent time.

[0465] 5.4.3.2.3 Ventilation Volume Determination

[0466] In one form of the present technology, the ventilation volume determination algorithm 4323 receives the respiratory flow rate Qr as an input and determines a measured value indicative of the current patient ventilation volume Vent.

[0467] In some implementations, the ventilation volume determination algorithm 4323 determines a measured value of the ventilation volume Vent, which is an estimate of the actual patient ventilation volume. One such implementation is to take half of the absolute value of the respiratory flow rate Qr, which is optionally filtered by a low-pass filter (e.g., a second-order Bessel low-pass filter with a corner frequency of 0.11 Hz).

[0468] In other implementations, the ventilation volume determination algorithm 4323 determines a measured value of the ventilation volume Vent, which is approximately proportional to the actual patient ventilation volume. One such implementation estimates the peak respiratory flow rate Q during the inspiratory portion of the cycle 峰值 . If the flow waveform shape does not change much (here, when the flow waveforms of two breaths normalized in time and amplitude are similar, the two breaths are considered to have similar shapes), then this process and many other processes involving sampling the respiratory flow rate Qr produce measured values that are approximately proportional to the ventilation volume. Some simple examples include the median of the respiratory flow rate when it is positive, the median of the absolute value of the respiratory flow rate, and the standard deviation of the flow rate. Any linear combination of any order statistics of the absolute value of the respiratory flow rate using positive coefficients, and even some using both positive and negative coefficients, is approximately proportional to the ventilation volume. Another example is the average of the respiratory flow rate in the middle K proportion (by time) of the inspiratory portion, where 0 < K < 1. If the flow shape remains constant, there can be any number of measured values that are exactly proportional to the ventilation volume.

[0469] 5.4.3.2.4 Inspiratory Flow Limit Determination

[0470] In one form of the present technology, the central controller 4230 executes an inspiratory flow limit determination algorithm  4324 for determining the degree of inspiratory flow limit.

[0471] In one form, the inspiratory flow limit determination algorithm 4324 receives the respiratory flow rate signal Qr as an input and provides, as an output, a measure of the degree to which the inspiratory portion of the breath exhibits an inspiratory flow limit.

[0472] In one form of this technique, the inspiratory portion of each breath is identified by a zero-crossing detector. Multiple evenly spaced points (e.g., sixty-five) representing time points are interpolated along the inspiratory flow-time curve of each breath using an interpolator. The curve described by the points is then scalar-scaled to have unit length (duration / time period) and unit area to remove the effects of varying respiratory rate and depth. The scaled breath is then compared in a comparator to a pre-stored template representing normal unobstructed breathing (similar to...). Figure 6A The inspiratory portion of the breathing shown is compared. Breaths that deviate from a specified threshold (typically one scaling unit) at any point during the inspiratory period of this template (determined by the test element), such as those caused by coughing, sighing, swallowing, and snoring, are discarded. For the data that is not discarded, the central controller 4230 calculates a moving average of the first such scaling point over a number of preceding inspiratory events. For the second such point, the operation is repeated on the same inspiratory event, and so on. Thus, for example, the central controller 4230 generates sixty-five scaling data points, and these sixty-five scaling data points represent the moving average of a number of preceding inspiratory events (e.g., three events). The moving average of the continuously updated values ​​of these (e.g., sixty-five) points is referred to below as the “scaling flow”, which is designated as Qs(t). Alternatively, a single inspiratory event can be used instead of a moving average.

[0473] Based on the scaled flow, two shape factors can be calculated and used to determine the partial blockage.

[0474] The shape factor 1 is the ratio of the mean of intermediate (e.g., 32) scaled flow points to the mean of the overall (e.g., 65) scaled flow points. If this ratio is greater than 1, breathing is considered normal. If the ratio is 1 or less, breathing is considered obstructed. A ratio of approximately 1.17 is considered the threshold between partially obstructed and unobstructed breathing, and is equal to the degree of obstruction that allows adequate oxygenation to be maintained in a typical patient.

[0475] The shape factor 2 is calculated as the RMS deviation from the unit scaled flow rate at the midpoint (e.g., 32). An RMS deviation of approximately 0.2 units is considered normal. Zero RMS deviation is considered a fully flow-limited breath. The closer the RMS deviation is to zero, the more restricted the breath will be considered.

[0476] Shape factors 1 and 2 can be used as alternatives or in combination. In other forms of this technique, the number of sampling points, respiratory counts, and intermediate points can differ from those described above. Furthermore, the thresholds can differ from those described.

[0477] 5.4.3.2.5 Determination of Apnea and Insufficiency

[0478] In one form of this technology, the central controller 4230 executes an apnea / insufficiency determination algorithm 4325 for determining the presence of apnea and / or insufficiency.

[0479] In one form, the apnea / insufficiency determination algorithm 4325 receives the respiratory flow signal Qr as input and provides a flag indicating that apnea or insufficiency has been detected as output.

[0480] In one form, apnea is considered detected when a function of respiratory flow Qr falls below a flow threshold within a predetermined time period. This function can be determined by peak flow, relatively short-term average flow, or an intermediate flow between relatively short-term average and peak flow, such as RMS flow. The flow threshold can be a relatively long-term measure of flow.

[0481] In one form, insufficiency is considered detected when a function of respiratory flow Qr falls below a second flow threshold within a predetermined time period. This function can determine peak flow, relative short-term average flow, or the flow between the relative short-term average flow and peak flow, such as RMS flow. The second flow threshold can be a relatively long-term measure of flow. The second flow threshold is greater than the flow threshold used to detect apnea.

[0482] 5.4.3.2.6 Determining Snoring

[0483] In one form of this technology, the central controller 4230 executes one or more snoring determination algorithms 4326 for determining the degree of snoring.

[0484] In one form, the snoring determination algorithm 4326 receives a respiratory flow signal Qr as input and provides a measure of the degree of snoring presence as output.

[0485] The snoring determination algorithm 4326 may include the step of determining the flow signal strength in the range of 30-300 Hz. Furthermore, the snoring determination algorithm 4326 may include the step of filtering the respiratory flow signal Qr to reduce background noise (e.g., the sound of airflow from a blower system).

[0486] 5.4.3.2.7 Determination of airway patency

[0487] In one form of this technology, the central controller 4230 executes one or more airway occupancy determination algorithms 4327 for determining airway occupancy.

[0488] In one form, the airway occupancy determination algorithm 4327 receives the respiratory flow signal Qr as input and determines the power of the signal in a frequency range of approximately 0.75 Hz to approximately 3 Hz. A peak in this frequency range is considered an indication of airway occupancy. The absence of a peak is considered an indication of airway closure.

[0489] In one approach, the frequency range for finding the peak is the frequency of small forced oscillations in the therapeutic pressure Pt. In one implementation, the forced oscillation frequency is 2 Hz, and the amplitude is approximately 1 cmH2O.

[0490] In one form, the airway occupancy determination algorithm 4327 receives the respiratory flow signal Qr as input and determines the presence or absence of a cardiac signal. The absence of a cardiac signal is considered an indication of airway closure.

[0491] 5.4.3.2.8 Determination of target ventilation rate

[0492] In one form of this technology, the central controller 4230 takes the current ventilation volume measurement Vent as input and executes one or more target ventilation volume determination algorithms 4328 to determine the target value Vtgt of the ventilation volume measurement.

[0493] In some forms of this technology, there is no target ventilation determination algorithm 4328, and the target value Vtgt is predetermined, for example by hard-coding during the configuration of the RPT device 4000 or by manual input via the input device 4220.

[0494] In other forms of this technology, such as adaptive servo ventilation (ASV), the target ventilation determination algorithm 4328 calculates the target value Vtgt based on the value Vtyp, which indicates the patient's typical recent ventilation.

[0495] In some forms of adaptive servo ventilation, the target ventilation volume Vtgt is calculated as a high percentage, but smaller than, the typical recent ventilation volume Vtyp. This high percentage in such forms may be in the range of (80%, 100%), (85%, 95%), or (87%, 92%).

[0496] In other forms of adaptive servo ventilation, the target ventilation volume Vtgt is calculated to be slightly greater than 1 times the typical recent ventilation volume Vtyp.

[0497] A typical recent ventilation volume, Vtyp, is a value around which the distribution of the current ventilation volume metric, Vent, tends to cluster at multiple moments on a predetermined time scale; that is, it is a measure of the central tendency of the current ventilation volume metric in recent history. In one implementation of the target ventilation volume determination algorithm 4328, the recent history is on the order of minutes, but in all cases should be longer than the time scale of the tidal cycle. The target ventilation volume determination algorithm 4328 can use any of a variety of well-known central tendency measures to determine the typical recent ventilation volume, Vtyp, based on the current ventilation volume metric, Vent. One such measure is the output of a low-pass filter on the current ventilation volume metric, Vent, where the time constant is equal to one hundred seconds.

[0498] 5.4.3.2.9 Determination of Treatment Parameters

[0499] In some forms of this technology, the central controller 4230 executes one or more treatment parameter determination algorithms 4329 to determine one or more treatment parameters using values ​​returned by one or more other algorithms in the treatment engine module 4320.

[0500] In one form of this technology, the treatment parameter is the instantaneous treatment pressure Pt. In one implementation of this form, the treatment parameter determination algorithm 4329 uses the following equation to determine the treatment pressure Pt.

[0501] Pt=AΠ(Φ,t)+P0 (1)

[0502] in:

[0503] A is the amplitude.

[0504] Π(Φ, t) is the waveform template value (in the range of 0 to 1) at the current phase value Φ and time t, and

[0505] P0 is the base pressure.

[0506] If the waveform determination algorithm 4322 provides a waveform template Π(Φ, t) as a value lookup table Π indexed by the phase Φ, then the treatment parameter determination algorithm 4329 applies equation (1) by locating the nearest lookup table entry to the current value Φ of the phase returned by the phase determination algorithm 4321, or by interpolating between two entries that span the current value Φ of the phase.

[0507] The values ​​of amplitude A and baseline pressure P0 can be determined by treatment parameter algorithm 4329 and set according to the selected respiratory pressure treatment mode in the manner described below.

[0508] 5.4.3.3 Treatment Control Module

[0509] According to one aspect of the present technology, the treatment control module 4330 receives treatment parameters as input from the treatment parameter determination algorithm 4329 of the treatment engine module 4320, and controls the pressure generator 4140 to deliver an airflow according to the treatment parameters.

[0510] In one form of this technology, the treatment parameter is the treatment pressure Pt, and the treatment control module 4330 controls the pressure generator 4140 to deliver an airflow at the patient interface 3000 with a mask pressure Pm equal to the treatment pressure Pt.

[0511] 5.4.3.4 Fault Condition Detection

[0512] In one form of this technology, the central controller 4230 executes one or more methods 4340 for detecting fault conditions. The fault conditions detected by the one or more methods 4340 may include at least one of the following:

[0513] • Power failure (no power or insufficient power)

[0514] • Converter fault detection

[0515] The presence of the component could not be detected.

[0516] • Operating parameters are outside the recommended range (e.g., pressure, flow rate, temperature, PaO2).

[0517] • The test alarm failed to generate a detectable alarm signal.

[0518] When a fault condition is detected, the corresponding algorithm 4340 notifies the existence of a fault by signaling one or more of the following:

[0519] • Activate audible, visual, and / or dynamic (e.g., vibration) alarms.

[0520] Sending messages to external devices

[0521] • Log of events

[0522] 5.5 Air Circuit

[0523] According to one aspect of the present technology, the air circuit 4170 is a conduit or tube that is constructed and arranged to allow airflow to travel between two components, such as the RPT device 4000 and the patient interface 3000, during use.

[0524] Specifically, the air circuit 4170 can be fluidly connected to the outlet of the pneumatic block 4020 and the patient interface. The air circuit can be referred to as an air delivery tube. In some cases, the circuit can have separate branches for inhalation and exhalation. In other cases, a single branch is used.

[0525] In some forms, the air circuit 4170 may include one or more heating elements configured to heat the air in the air circuit, for example, to maintain or raise the temperature of the air. The heating elements may be in the form of a heating wire circuit and may include one or more transducers, such as temperature sensors. In one form, the heating wire circuit may be helically wound around the axis of the air circuit 4170. The heating elements may be connected to a controller, such as a central controller 4230. An example of an air circuit 4170 including a heating wire circuit is described in U.S. Patent Application No. 8,733,349, which is incorporated herein by reference in its entirety.

[0526] 5.5.1 Oxygen Delivery

[0527] In one form of this technology, supplemental oxygen 4180 is delivered to one or more points in the pneumatic path (e.g., upstream of pneumatic block 4020), air circuit 4170, and / or patient interface 3000.

[0528] 5.6 Humidifier

[0529] 5.6.1 Overview of Humidifiers

[0530] In one form of this technology, a humidifier 5000 is provided (e.g., such as...). Figure 5C (As shown), to change the absolute humidity of the air or gas used to deliver to the patient relative to ambient air. Typically, the humidifier 5000 is used to increase the absolute humidity of the airflow and increase the temperature of the airflow (relative to ambient air) before it is delivered to the patient's airway.

[0531] RPT unit and humidifier

[0532] Figure 6A , 6B Figures 7 and 8A to 8D illustrate an integrated RPT device and humidifier 6000 according to an example of the present technology. As shown, the integrated RPT device and humidifier 6000 includes a reservoir base 6050 configured and arranged to receive a water reservoir 6100 (also referred to as a humidifier reservoir tank or humidifier water reservoir). In the illustrated example, the integrated RPT device and humidifier 6000 includes a humidifier integrated with the RPT device, such that the pneumatic block 7100 of the RPT device includes components that perform the functions of the RPT device and components that perform the functions of the humidifier. For example, as... Figure 7 As shown, the reservoir base 6050 is integrated with the pneumatic block 7100 of the RPT device to provide an integral unit, and the reservoir base 6050 is constructed and arranged to receive the water reservoir 6100.

[0533] It should be understood that the humidifier (e.g., reservoir base 6050) may be separately disposed on the RPT device (e.g., pneumatic block 7100) in an alternative arrangement. In such an arrangement, an additional interface may be used to connect the humidifier (e.g., reservoir base 6050) to the RPT device (e.g., pneumatic block 7100).

[0534] The RPT device includes a blower supported within a pneumatic block 7100. The blower is configured and arranged to generate an airflow or supply at a positive pressure, for example, in the range of 2-50 cmH2O. In one instance, the blower may comprise a single-stage or multi-stage design, such as a two-stage or more-stage design. The blower is operable to draw air supply into the pneumatic block 7100 and into its inlet (blower inlet), for example, through one or more inlet openings in the pneumatic block, and to provide a pressurized air supply at its outlet (blower outlet). Examples and details of exemplary blowers are described in PCT patent application publication WO 2013 / 020167, which is incorporated herein by reference in its entirety. The blower outlet communicates with a humidifier, such as the inlet of a water reservoir 6100.

[0535] The pneumatic block 7100 includes a chassis assembly 7300, such as a top chassis and a bottom chassis. The chassis assembly 7300 includes a chassis inlet 7310 (see, for example, see...). Figure 20E ) and chassis outlet 7320 (for example, see Figure 20F and 21 In one instance, the outer housing 8002, which includes one or more panels and / or one or more user inputs / displays, may enclose the pneumatic block 7100, for example, see [link to relevant documentation]. Figure 6A and 6B The chassis assembly 7300 supports and / or houses the internal components of the pneumatic block 7100, such as a blower. The chassis assembly 7300 also supports a printed circuit board assembly (PCBA) 7600. The chassis assembly 7300 and the internal components of the pneumatic block cooperate to form a pneumatic airflow path extending from the chassis inlet 7310 to the blower inlet of the blower and from the blower outlet of the blower to the chassis outlet 7320. The chassis outlet 7320 is adapted to communicate with the reservoir base 6050 and the inlet of the water reservoir 6100 when the water reservoir is received in the reservoir base 6050. The reservoir base 6050 is also configured and arranged to allow communication between the outlet of the water reservoir 6100 and the air circuit 4170, as described in more detail below.

[0536] While the examples described are largely based on the idea that air circuits or air delivery pipes can be attached to a water reservoir base, it should be understood that some air delivery systems do not have humidification and water reservoirs. In such cases, the air delivery pipe can be connected directly or indirectly to the pipe fitting of the RPT unit. In these cases, all the above disclosures relating to the water reservoir fitting also apply to the fitting of the corresponding pipe of the RPT unit.

[0537] Furthermore, the RPT device and / or humidifier provides a connection or engagement port for connecting to the air circuit or air delivery line 4170, i.e., the point where the air delivery line 4170 engages with the RPT device and / or humidifier. In examples described below, the connection or engagement port may include, for example, an outlet pipe 6130 (outlet) of a water reservoir 6100, an outlet of an outlet silencer 4124, an intermediate component 6700, or an intermediate component 9700. The function of the connection or engagement port is to deliver pressurized air generated in the RPT device to the air delivery line and the patient interface, and therefore it can be used with RPT devices with or without a humidifier. In examples, the connection or engagement port may also be positioned, secured, and / or electrically connected to the air delivery line. Furthermore, it should be understood that the connection or engagement port can be located anywhere on the RPT device and / or humidifier, as long as it is in communication with the pressurized flow source of the RPT device and / or humidifier (e.g., a water reservoir) (e.g., via one or more intermediate connectors). For example, the connection or engagement port may be part of the water reservoir base, or it may be located elsewhere (i.e., not part of the water reservoir base) and communicate with the pneumatic block of the water reservoir base, its water reservoir, or the RPT device.

[0538] 5.6.2 Humidifier Components

[0539] 5.6.2.1 Water Storage Tank

[0540] Figures 6B to 9 A water reservoir 6100 according to an example of the present technology is shown. The water reservoir 6100 is configured to maintain or retain a liquid (e.g., water) capacity for evaporation to humidify the airflow. The water reservoir 6100 may be configured to maintain a predetermined maximum water capacity to provide adequate humidification for at least the duration of a respiratory therapy session, such as one night of sleep. Typically, the water reservoir is configured to hold several hundred milliliters of water, such as 300 ml, 325 ml, 350 ml, or 400 ml, but it should be understood that other volumes of liquid, such as at least 100 ml, may also be used. In other forms, the humidifier may be configured to receive a water supply from an external water source, such as a building's water supply system.

[0541] In the illustrated example, the water reservoir 6100 includes a reservoir base 6112 (also referred to as a reservoir body, humidifier reservoir base, or humidifier reservoir body) and a reservoir cover 6114 (also referred to as a humidifier reservoir cover) removably connected to the reservoir base 6112. A deformable seal may be provided for the reservoir cover and / or the reservoir base, for example, see in [reference to...]. Figure 19C A deformable peripheral seal 6116 is disposed around the periphery of the reservoir cover 6114. When the reservoir cover 6114 is attached to the reservoir base 6112, the seal 6116 is constructed and arranged to engage between the cover 6114 and the base 6112 to seal the cover and the base and prevent water from flowing out of the water reservoir. The reservoir cover 6114 may be configured to be completely removed from the reservoir base 6112, for example, for patient availability to clean the interior of the reservoir base and / or the reservoir cover. In an alternative embodiment, the reservoir cover 6114 may be permanently attached to the reservoir base 6112.

[0542] According to one aspect, the water reservoir 6100 is configured to increase the humidity of an airflow from the RPT device as airflow passes through it. In one form, the water reservoir 6100 may be configured to cause the airflow to travel through the reservoir in a tortuous path while contacting the water volume therein. For example, the water reservoir 6100 may include one or more flow elements, such as baffles, to facilitate a tortuous flow path.

[0543] As described in more detail below, the water reservoir 6100 can be removably coupled to the reservoir base 6050. In one example, the water reservoir can be inserted / removed along a path extending in a front-to-back direction. In an alternative example, at least a portion of the path for inserting / removing the water reservoir may extend in a down-to-up direction; for example, at least a portion of the path for insertion includes a ramp or descent into the operating position.

[0544] The water reservoir 6100 may also be configured to prevent liquid from flowing out of it, for example, through any hole and / or between its sub-components, when the reservoir is moved and / or rotated from its normal operating direction. Since the airflow to be humidified by the humidifier is typically pressurized, the reservoir may also be configured to prevent loss of pneumatic pressure due to leakage and / or flow resistance.

[0545] Base of storage device

[0546] like Figure 9 As shown, the reservoir base 6112 includes a body 6140 and a conductive portion 6150. The body 6140 includes multiple walls, and the conductive portion 6150 is typically disposed on the bottom wall to form a chamber or cavity for containing a certain volume of water.

[0547] The reservoir base 6112 is constructed and arranged to engage or dock with the reservoir cover 6114. In such cases... Figure 19C In the example shown, the periphery of the reservoir base 6112 is provided with a surface arranged to engage or mat with a seal 6116 provided on the reservoir cover 6114, for example to prevent water from flowing out of the water reservoir.

[0548] The reservoir base 6112 can be configured and arranged to hold the reservoir cover 6114 on the reservoir base 6112, for example, by a hinge arrangement and / or a snap-fit ​​locking tab to hold the reservoir cover on the reservoir base in a releasable manner.

[0549] Conductive part

[0550] The conductive portion 6150 is configured to allow heat to be transferred from the heating element (e.g., Figure 6B The heating plate 6080 of the reservoir base 6050 shown effectively transfers a certain volume of liquid into the reservoir. In one form, the conductive portion can be arranged as a plate, but other shapes are equally applicable. All or part of the conductive portion can be made of a thermally conductive material, such as aluminum (e.g., with a thickness of approximately 2 mm, such as 1 mm, 1.5 mm, 2.5 mm, or 3 mm), another thermally conductive metal, or some plastics. In some cases, suitable thermal conductivity can be achieved using materials with appropriate geometries and lower conductivity.

[0551] Conductive components including metal plates and / or thin films

[0552] In one example, the conductive portion 6150 may comprise a layered arrangement of a metal plate, a non-metallic film (also referred to as a membrane plate or membrane substrate), or a combination of metal plates and non-metallic films. As described below, the conductive portion 6150 is configured to be thermally coupled to the heating plate 6080 of the reservoir base 6050 to allow heat transfer from the heating plate 6080 to a volume of liquid in the water reservoir 6100.

[0553] Figures 10A to 10G A reservoir base 6112M1 according to an example of the present technology is shown, comprising a metal plate as a conductive portion 6150M. In one example, the reservoir base 6112M1 comprises a two-part structure, namely, only a body 6140 and a metal conductive portion 6150M.

[0554] As shown in the figure, the main body 6140 includes multiple walls, and a metallic conductive portion 6150M is disposed on the bottom wall to form a chamber for containing a certain volume of water. For example, the main body 6140 includes side walls 6142 extending around the periphery of the main body 6140 and a bottom wall 6144 connecting the side walls 6142. The metallic conductive portion 6150M is disposed or otherwise incorporated into the bottom wall 6144 to form a chamber for containing water.

[0555] In one example, the thermally conductive metallic portion 6150M is provided as a separate and distinct structure from the body 6140, and is then fixed or otherwise disposed in an operating position on the bottom wall 6144. For example, the thermally conductive metallic portion 6150M includes a pre-formed structure fixed to the bottom wall 6144. In one example, the thermally conductive metallic portion 6150M comprises a metallic material, such as a metal sheet, and the body 6140 comprises a plastic or thermoplastic polymer material, such as PC, ABS, or copolyester. In one example, the conductive portion 6150M can typically have a uniform wall thickness of about 0.25-0.50 mm, for example, 0.40 mm. For the thermally conductive portion, the wall thickness can even be greater, for example, up to 1.5 mm. If a thin film is used instead (see below for more information...), the thermally conductive metallic portion 6150M can be used in this way. Figures 13A to 13C If the thickness is as described above, then a smaller thickness, such as 0.1-0.5mm, can be used.

[0556] In one example, the conductive metal portion 6150M can be pre-formed and then embedded into the plastic body 6140. For instance, the conductive metal portion is first formed into its working configuration through one or more metal forming processes. Then, the conductive metal portion or insert is inserted into the injection mold of the body before melt injection molding. During injection molding, the melt flows around the edge of the conductive metal portion and locks or attaches the conductive metal portion to the body as the melt solidifies.

[0557] like Figure 10G As shown, the metallic conductive portion 6150M may include a bottom wall or plate 6152M, a side wall 6154M extending around the periphery of the plate 6152M, and an interface portion 6156M that engages with the bottom wall 6144 to secure the metallic conductive portion 6150M to the plastic body 6140. In an alternative arrangement, the metallic conductive portion 6150M may extend to the peripheral side wall 6142 of the body 6140, thereby replacing the bottom wall 6144. In this case, the interface portion 6156M may engage with the side wall 6142 of the body 6140.

[0558] like Figure 10GAs shown, plate 6152M includes a first side 6152.1M adapted to form the bottom inner surface of a reservoir, the surface of which is exposed to water. A second side 6152.2M of plate 6152M is opposite to the first side and adapted to form the bottom outer surface of the reservoir, the surface of which is exposed to the heating plate. Thus, the second side 6152.2M of plate provides a contact surface configured and arranged to directly engage with heating plate 6080.

[0559] In one example, plate 6152M may include a pre-formed, fully or dome-shaped form, i.e., the second side 6152.2M provides a generally convex surface. When water reservoir 6100 is inserted into reservoir base 6050, an bias may be provided between the water reservoir and the heating plate, causing the bent plate 6152M to flatten, for example, become substantially flat, so that it aligns or conforms to the flat surface of heating plate 6080. Flattening of the bent plate 6152M creates a bias between plate 6152M and heating plate 6080 to ensure good thermal contact and improve heat transfer between the heating plate and the water within the water reservoir. In one example, the bending of the plate may be formed by placing a metallic conductive portion into a smaller opening in the bottom wall of the body, for example, the smaller opening in the bottom wall compressing the metallic conductive portion to form a bend in the plate.

[0560] In an alternative example, the plate 6152M may include a generally planar shape, i.e., a pre-formed planar shape.

[0561] In the illustrated example, the metallic conductive portion 6150M is configured such that the plane of the plate 6152M is offset and substantially parallel to the plane of the bottom wall 6144 of the body 6140, i.e., the plate is below the bottom wall when the water reservoir is in a vertical operating orientation. In an alternative example, the metal plate 6152M can be configured such that the plate is substantially coplanar with the bottom wall 6144, i.e., thereby achieving a substantially flat bottom surface at the base of the reservoir. In another example, the metal plate 6152M can be configured to extend in more than one plane; for example, the metal plate can provide as... Figure 29 The stepped layout is shown.

[0562] In one example, the metallic conductive portion 6150M may include a surface treatment, such as a plasma surface treatment. For example, the inner and / or outer sides of the metallic conductive portion, such as at least on its interface portion 6156M, may include nanoparticles on the metallic surface.

[0563] In the illustrated example, the plate 6152M of the reservoir base 6112M1 has a rectangular shape, for example, corresponding to the shape of the heating plate 6080 within the reservoir base 6050. However, it should be understood that the plate 6152M may include other suitable shapes, which may or may not correspond to the shape of the heating plate, such as circular, square, or elliptical. For example, Figures 11A to 11C The reservoir base 6112M2 is shown, wherein the metal plate 6152M of the metallic conductive portion 6150M is circular. In alternative embodiments, the sidewalls extending around the periphery of the plate and / or interface portion may be longer to provide a deeper metallic conductive portion, see, for example, [reference needed]. Figures 12A to 12C The image shows a reservoir base 6112M3 with a rectangular metal conductive portion 6150M that has been stretched deeper.

[0564] Figures 13A to 13C A reservoir base 6112F1 according to an example of the present technology is shown, comprising a non-metallic thin film as a conductive portion 6150F. In one example, the reservoir base 6112F1 comprises a two-part structure, namely, only a body 6140 and a thin film conductive portion 6150F.

[0565] The film conductive portion 6150F may include a thermally conductive nonmetallic material, such as silicone, polycarbonate or other thermoplastic or elastomer materials, such as copolyester.

[0566] In one example, the thin-film conductive portion 6150F may include a thickness of about 0.05 mm to 0.5 mm, for example, 0.10 mm to 0.125 mm. In rare cases, a thicker film, i.e., up to 1.5 mm, may be required. In one example, the thin-film conductive portion 6150F may include a thickness equal to or less than about 1 mm, for example, 0.5 mm, and less than about 0.5 mm, for example, 0.40 mm, 0.375 mm, 0.25 mm, 0.175 mm, or 0.125 mm.

[0567] like Figures 13A to 13CAs shown, the main body 6140 of the reservoir base 6112F1 includes a bottom wall 6144 and side walls 6142 extending around the periphery of the bottom wall 6144. In such an example, a thin-film conductive portion 6150F may extend across an opening provided in the bottom wall 6144, and the thin-film conductive portion 6150F is configured not only to extend across the opening but also to cover at least a portion of the remaining bottom wall 6144 to enhance the seal between them and ensure that the reservoir base is leak-proof. Thus, the thin-film conductive portion 6150F forms at least a portion of the bottom of the water reservoir base to form a chamber for receiving and preventing water from flowing out of the water reservoir. Furthermore, for example, for better sealing, the thin-film conductive portion 6150F may not only overlap with the opening in the bottom wall 6144 but may also extend to cover at least a portion of the side wall 6142 of the reservoir base.

[0568] In one example, the film conductive portion 6150F is provided as a separate and distinct structure from the body 6140, and is then fixed or otherwise disposed on the body at an operating position; for example, the film includes a pre-formed structure fixed to the body. In one example, the body 6140 comprises a plastic or thermoplastic polymer material, such as PC, ABS, or copolyester.

[0569] In one example, the thin-film conductive portion 6150F may be pre-formed and then embedded or otherwise attached to the plastic body 6140, for example, by means of an adhesive. For instance, the thin-film conductive portion 6150F may first be formed for its working configuration, for example, by a vacuum forming process. The thin-film conductive portion 6150F or an insert may then be inserted into the plastic body 6140. Application WO 2018 / 094452 is referenced herein and is incorporated herein by reference in its entirety.

[0570] Post-forming shaping of thin films

[0571] When embedding a membrane sheet into the base of a polycarbonate humidifier tank (also known as a water reservoir base), the geometry of the membrane can be problematic. Typically, the membrane is pre-formed (e.g., stamped into a deep-drawn stepped shape) and then embedded. However, as the mold cools, tension at different locations within the mold can cause the membrane to bend and twist. This is further complicated by the different mechanical properties and coefficients of thermal expansion / contraction of the membrane and the water reservoir base. Therefore, it is difficult to control the membrane shape during cooling. One approach to mitigate this problem is to shape the membrane after the molding process (post-forming). That is, one can embed the membrane into a flat membrane and then post-form it into a stretched shape. It will still shrink during molding. However, when a shrinking / twisted membrane is post-formed, the molding process will tighten / straighten the membrane, resulting in tighter geometry control.

[0572] In post-forming shaping processes, it begins with a membrane of some form (e.g., a flat membrane). This membrane is not in its final form (e.g., a flat structure). Plastic can then be embedded and molded around the flat membrane. After the plastic is molded, the membrane is deformed again. However, stamping, vacuum forming, or thermoforming can now be used to produce the desired stepped geometry. In the process of forming this final geometry of the membrane, the membrane is stretched in a controlled manner to create a very flat surface.

[0573] Vacuum forming is similar to molding because it typically involves temperature and pressure, although for some small geometric changes, pressure alone may be sufficient. To effectively control the geometry, we need to carefully control the temperature. Therefore, in the formation of stepped geometries, we only soften the film and attempt not to soften the surface of the plastic bucket surrounding the film. Thus, the chemical composition of the bucket and film, the post-forming temperature and pressure should ensure that only the film softens during the post-forming setting process, not the bucket. The shape doesn't necessarily have to be stepped—it can be any surface with one or more depressions (tensioned areas) that eliminate the relaxation of a flat surface.

[0574] This technology can also be used to manufacture face masks and LCD windows (for film covers with antibacterial properties, which will cover any gaps or edges where bioburden can accumulate). In one instance, the film can be used to manufacture face masks, specifically disposable face masks. The film is preferably best suited to form the walls of the inflatable chamber that defines the face mask. However, the frame can also include a film body, with only the edges formed of a harder plastic and attached to a seal. The geometry of the face mask can be much more complex, and for example, tight control may be important. This can be achieved through post-forming. It is important to ensure a uniform bond between the film and the remaining surface.

[0575] When we need to process the film after molding, a certain amount of time is required after the molding process for the film to proceed effectively. This time can be related to the stage of the cooling of the molded film and / or the shrinkage process associated with the cooling process. Both of these processes (cooling and shrinkage) depend on time non-linearly and, although closely related, are still distinct processes. This is a significant advantage of the proposed process, which allows the film shaping process to be carried out with the same tools and setup as the embedding molding process. This can save considerable time and cost.

[0576] For successful post-forming shaping of films, it is important to follow a process that allows any significant dimensional changes (such as those occurring during plastic molding on the film) to stabilize before the film sets. The aim is to complete the molding process at a stage where sufficient cooling has occurred, bringing the plastic close to dimensional stability. Therefore, post-forming shaping allows for good dimensional control and stability of the resulting film parts.

[0577] Furthermore, this method is applicable anywhere a window / opening exists in the component. The window allows the stamping tool to approach the film and perform post-forming shaping steps. Arrangements with multiple windows are used in conjunction with one or more large film portions, one or more of which are arranged to cover more than one window.

[0578] like Figure 13C As shown, the thin-film conductive portion 6150F includes a bottom wall or plate 6152F, a side wall 6154F extending around the periphery of the plate 6152F, and an interface portion 6156F for fixing the thin-film conductive portion 6150F to the plastic body 6140.

[0579] like Figure 13C As shown, plate 6152F includes a first side 6152.1F adapted to form the bottom inner surface of a reservoir, the surface of which is exposed to water. Plate 6152F includes a second side 6152.2F opposite to the first side, and in some cases adapted to form the bottom outer surface of the reservoir, the surface of which is exposed to the heating plate. Thus, the second side 6152.2F of the plate provides a contact surface configured and arranged to directly engage with the heating plate 6080.

[0580] In one example, similar to the examples previously described with respect to the metallic thermally conductive plate, plate 6152F may include a pre-formed curved or dome shape, i.e., the second side 6152.2F provides a generally convex surface. When the water reservoir 6100 is inserted into the reservoir base 6050, the water reservoir and the heating plate can be biased against each other, causing the curved plate 6152F to flatten, for example, become substantially flat, so that it aligns or conforms to the flat surface of the heating plate 6080. The flattening of the curved plate 6152F creates a bias between plate 6152F and the heating plate 6080 to ensure good thermal contact and improve heat transfer between the heating plate and the water within the water reservoir. In one example, the bending of the plate can be formed by placing a thin-film conductive portion into a smaller opening in the bottom wall of the body, for example, by the smaller opening in the bottom wall compressing the thin-film conductive portion to form a bend in the plate.

[0581] In an alternative example, plate 6152F may include a generally planar shape, i.e., a pre-formed planar shape.

[0582] In the illustrated example, the thin-film conductive portion 6150F is configured such that the plate 6152F is offset and substantially parallel to the bottom wall 6144 of the body 6140, i.e., the plate is below the bottom wall. In an alternative example, the thin-film conductive portion 6150F may be configured such that the plate 6152F is substantially coplanar with the bottom wall 6144, thereby achieving a substantially flat bottom surface for the reservoir base. In another example, the thin-film conductive portion 6152F may be configured to extend in more than one plane; for example, the thin-film conductive portion may provide, as shown in the example... Figure 29 The stepped layout is shown.

[0583] In an example not shown, one or more ribs may be provided along the first and / or second side of the thin-film conductive portion 6150F, for example, to increase the rigidity of the thin-film conductive portion and / or enhance the force suitable for pushing the thin-film conductive portion toward the heating plate.

[0584] In one example, a thin metal layer (e.g., a mesh) may be provided along the first and / or second sides of the thin film conductive portion 6150F, for example, to improve thermal conductivity.

[0585] In the illustrated example, the plate 6152F of the reservoir base 6112F1 has a rectangular shape, for example, corresponding to the shape of the heating plate 6080 within the reservoir base 6050. However, it should be understood that the plate 6152F may include other suitable shapes, which may or may not correspond to the shape of the heating plate, such as circular, square, or elliptical. For example, Figures 14A to 14C The base 6112F2 of the reservoir is shown, wherein the plate 6152F of the thin-film conductive portion 6150F is circular.

[0586] Figures 15A to 15C A reservoir base 6112MF1 according to an example of the present technology is shown, which includes a layered arrangement of a combination of metal plates and non-metallic thin films as a conductive portion 6150MF. In one example, the reservoir base 6112MF1 includes a three-part structure, namely, a body 6140, a metallic conductive portion 6150M, and a thin-film conductive portion 6150F.

[0587] The film conductive portion 6150F may include a thermally conductive nonmetallic material, such as silicone, polycarbonate or other thermoplastic or elastomer materials, such as copolyester.

[0588] In one example, the thin-film conductive portion 6150F may include a thickness of about 0.05 mm to 1 mm, such as 0.10 mm to 0.125 mm. In another example, the thin film may include a thickness of less than about 1 mm, such as 0.5 mm, or less than about 0.5 mm, such as 0.40 mm, 0.375 mm, 0.25 mm, 0.175 mm, or 0.125 mm.

[0589] In such Figure 15B and 15C In the illustrated example, the reservoir base 6112MF1 includes a bottom wall 6144 and side walls 6142 extending around the periphery of the bottom wall 6144. In such an example, the thin-film conductive portion 6150F not only covers the metallic conductive portion 6150M but also extends to cover at least a portion of the remaining bottom wall 6144. This arrangement ensures that the connection boundary between the metallic conductive portion 6150M and the bottom wall 6144 is covered by the thin-film conductive portion 6150F to enhance the water seal between them and ensure that the reservoir base is leak-proof. For even better sealing, the thin-film conductive portion 6150F can not only cover the connection boundary between the metallic conductive portion 6150M and the bottom wall 6144 but can also extend to cover at least a portion of the side walls 6142 of the reservoir base. This is especially important when the metallic conductive portion 6150M covers the entire bottom wall 6144 and may cover a portion of the side wall 6142, and the connection boundary is actually located between the metallic conductive portion 6150M and the side wall 6142.

[0590] As shown, the thin-film conductive portion 6150F includes a first side 6152.1F adapted to form the bottom inner surface of the reservoir, the surface of which is exposed to water. The thin-film conductive portion 6150F includes a second side 6152.2F opposite to the first side, adapted to engage the metal conductive portion 6150M and the bottom and side walls 6144, 6142 of the reservoir base. The metal conductive portion 6150M forms the bottom outer surface of the reservoir, the surface of which is exposed to the heating plate 6080. Thus, the metal conductive portion 6150M provides a contact surface constructed and arranged to engage directly with the heating plate 6080. One advantage of this arrangement is that the more scratch-resistant metal heat-conducting plate 6150M mechanically interacts with the heating plate 6080.

[0591] In an alternative example (not shown), the thin-film conductive portion 6150F may be disposed on another outer surface of the reservoir, wherein the metallic conductive portion 6150M forms an inner (upper) surface that contacts the water contents of the reservoir. The advantage of this arrangement is that, in this case, the chemical composition and stability of the thin-film conductive portion are less critical; for example, the thin-film conductive portion does not come into contact with the water in the reservoir.

[0592] In one example, one or more ribs may be provided along the first and / or second side of the conductive portion 6150F of the thin film, for example, to increase the rigidity of the thin film and / or enhance the force suitable for pushing the thin film / metal plate toward the heating plate.

[0593] In one example, a metal layer (e.g., a mesh) may be provided along the first and / or second side of the thin film conductive portion 6150F, for example, to improve thermal conductivity.

[0594] In one example, the shape of the conductive portion 6150MF may correspond to the shape of the heating plate 6080, for example, to obtain stable and more efficient thermal conductivity. For example, the conductive portion 6150MF and the heating plate 6080 may include circular or non-circular shapes, such as rectangular, square, or elliptical. In the illustrated example, the conductive portion 6150MF includes a rectangular shape, for example, corresponding to the shape of the heating plate 6080 within the reservoir base 6050. Figures 16A to 16C Another alternative example is shown, in which the reservoir base 6112MF2 includes a circular conductive portion 6150MF. Figures 17A to 17C The reservoir base 6112MF3 is shown, including a rectangular conductive portion 6150MF that is stretched deeper.

[0595] In one example, the thin-film conductive portion 6150F and the metal conductive portion 6150M are provided as separate and distinct structures from the body 6140, and are then fixed or otherwise disposed in an operating position on the body 6140. For example, the thin-film conductive portion 6150F and the metal conductive portion 6150F include a pre-formed structure fixed to the body 6140. In one example, the body 6140 comprises a plastic or thermoplastic polymer material, such as PC, ABS, or copolyester.

[0596] In one example, the thin-film conductive portion 6150F can be pre-formed (e.g., vacuum-formed) and then assembled to the pre-formed metal conductive portion 6150M (e.g., bonded, laminated, or simply joined together). The thin-film / metal plate heat-conducting assembly portion can then be partially embedded into the plastic body 6140, i.e., the bottom and sidewalls of the body 6140 are injection-molded onto the thin-film / metal plate assembly. In another example, the metal conductive portion 6150M can be individually embedded into the body 6140, and then the thin-film conductive portion 6150F can be bonded to the metal conductive portion 6150M to at least cover the metal conductive portion 6150M, and preferably cover areas of the body 6140 extending beyond the metal conductive portion 6150M, to ensure a reliable seal at the contact boundary between the metal conductive portion 6150M and the body 6140. In any of the above examples, a vacuum can be used to remove the air gap between the thin-film conductive portion 6150F and the metal conductive portion 6150M. In addition, an adhesive (e.g., a bonding agent) can be used between the thin-film conductive portion 6150F and the metal conductive portion 6150M, for example, to maintain the assembly and ensure good thermal conductivity.

[0597] In one example, the metallic conductive portion 6150M and / or the thin-film conductive portion 6150F may include a pre-formed curved or dome shape, i.e., the underside of the metallic conductive portion 6150M and / or the thin-film conductive portion 6150F provides a generally convex surface. When the water reservoir 6100 is inserted into the reservoir base 6050, the curved metal plate / film will flatten, for example, become substantially flat, so as to align or conform itself to the flat surface of the heating plate 6080. The flattening of the curved metal plate / film creates a bias between the metal plate / film and the heating plate to ensure good thermal contact and improve heat transfer between the heating plate and the water within the water reservoir. In one example, the curvature of the metal plate / film can be formed by placing the metal plate / film into a smaller opening in the bottom wall of the body, for example, by the smaller opening in the bottom wall compressing the metal plate / film to form a curvature within the metal plate / film.

[0598] In an alternative example, the metal sheet / film may include a generally planar shape, i.e. a pre-formed planar shape.

[0599] In the illustrated example, the metal plate / film is configured such that it is offset and substantially parallel to the bottom wall of the body, i.e., the metal plate / film is below the bottom wall. In an alternative embodiment, the metal plate / film may be configured such that it is substantially coplanar with the bottom wall, thus achieving a substantially flat bottom surface at the reservoir base. In another example, the metal plate / film may be configured to extend in more than one plane; for example, the metal plate / film may provide, as shown in the example... Figure 29The stepped layout is shown.

[0600] The advantage of combining the thin-film conductive portion 6150F and the metallic conductive portion 6150M lies in the fact that the non-metallic properties of the thin film (e.g., thermoplastic or elastomeric material properties) provide corrosion protection (e.g., protection required due to exposure to water) and improve the seal with the bottom wall (e.g., to form a sealed reservoir for humidifying water), while the metallic properties of the metal plate provide good thermal contact, rigidity, and durability, for example, for multi-patient multi-purpose applications.

[0601] Storage lid

[0602] like Figure 18A , 18B As shown in 19A to 19G, the reservoir cover 6114 is configured to connect to the reservoir base 6112. This configuration can be arranged to allow the water reservoir to switch between an open and closed configuration. For example, the reservoir cover 6114 can be hingedly connected to the reservoir base 6112 via a hinge pin. In an alternative embodiment, the reservoir cover 6114 may include a plurality of spring-loaded locking tabs adapted to interlock with the reservoir base 6112, for example, by a snap-fit ​​engagement. In one embodiment, a seal 6116 (e.g., see...) Figure 19C A seal can be provided on the reservoir cover 6114, for example, to prevent water from flowing out from the connection boundary between the cover 6114 and the base 6112 of the water reservoir. In one form, the reservoir cover 6114 can be made of a biocompatible material, such as plastic or thermoplastic polymer, such as PC, ABS, copolyester, etc.

[0603] like Figure 18A and 18B As shown, the reservoir cover 6114 may include an inlet pipe 6120 and an outlet pipe 6130, the inlet pipe 6120 being arranged to provide an inlet for receiving an airflow entering the water reservoir, and the outlet pipe 6130 being arranged to provide an outlet for delivering a humidified airflow from the water reservoir.

[0604] When the reservoir cover 6114 is attached to the reservoir base 6112, the inlet pipe 6120 includes an outer (inlet) end 6124 disposed outside the chamber and an inner (outlet) end 6126 disposed inside the chamber. Similarly, the outlet pipe 6130 includes an outer (outlet) end 6134 disposed outside the chamber and an inner (inlet) end 6136 disposed inside the chamber. Each inlet or outlet pipe (together with the corresponding inlet and outlet of each pipe) may be replaced by an opening in the wall of the reservoir cover.

[0605] In one example, the inlet seal 6122 is located at the free external (inlet) end of the inlet pipe 6120 (see [reference]). Figure 19A, 19B 19D and 21), and / or outlet seal 6132 is provided at the free external (outlet) end of outlet pipe 6130 (e.g., see Figure 21 The inlet and outlet seals 6122 and 6132 are part of the water reservoir, not the RPT unit, which allows for seal replacement each time the water reservoir is changed; this is a useful feature, especially in the case of disposable water reservoirs. In one example, each seal includes a bellows arrangement that provides a degree of decoupling between the two connection parts. In one example, the inlet and outlet seals may be overmolded onto the reservoir cover.

[0606] Figure 80 It shows something similar to Figure 6A , 6B The integrated RPT device and humidifier 6000 according to an example of the present technology are shown in 7 and 8A to 8D.

[0607] Figure 80 , 85 Figures 86 and 134 to 136 show a water reservoir 6100 and a reservoir cover 6114 according to another embodiment of the present technology. In this embodiment, an inlet seal 6122 (e.g., a bellows arrangement) is provided at the free external (inlet) end of the inlet pipe 6120, while no seal is provided at the free external (outlet) end of the outlet pipe 6130. Instead, as discussed below, such a seal can be provided at the inlet of an intermediate element to which the outlet pipe 6130 is attached. In use, when the water reservoir 6100 is removably connected to the reservoir base 6050, the inlet seal 6122 of the inlet pipe 6120 (or inlet) of the water reservoir 6100 is constructed and arranged to provide a face seal with the chassis outlet 7320 (base inlet) of the reservoir base 6050 (see Figure 1). Figure 100 , 131 And 133), and the inlet seal 9715 of the intermediate component 9700 (described in more detail below) is constructed and arranged to provide a face seal with the outlet end of the outlet pipe 6130 (or outlet) of the water reservoir 6100 (see 133). Figure 131 and 132 ).

[0608] Furthermore, in this example, the inlet seal 6122 can be overmolded together with the peripheral seal 6116 onto the reservoir cover 6114, the peripheral seal 6116 being arranged to form a seal between the cover 6114 and the base 6112 during use (see [link]). Figure 85 For example, seals 6122 and 6116 are integral, one-piece components made of elastomeric materials. That is, such as... Figure 85As shown, the reservoir cap 6114 (including inlet pipe 6120 and outlet pipe 6130) may include a first part or matrix molded part made of a relatively rigid material (e.g., thermoplastic polymer (e.g., PC, ABS)), and inlet seal 6122 and seal 6116 may include a second part or overmolded part made of a relatively soft material (e.g., thermoplastic elastomer (TPE) or silicone), which is provided (e.g., by overmolding) to the first part.

[0609] Furthermore, as shown in 80 and 85, a thumb grip 6133 may be provided (e.g., mechanically interlocked, snap-fit) on top of the reservoir cover 6144 to facilitate manual operation of the water reservoir 6100 and / or interlocking of the water reservoir 6100 with the reservoir base 6050. The thumb grip helps align the reservoir 6100 upon insertion. It also helps to grip and squeeze the portion of the reservoir 6100 that extends outside the RPT device and humidifier 6000 (e.g., see...). Figure 79 Due to the deformable properties of the peripheral seal 6116, when the user presses the thumb grip (squeezes the reservoir 6100), the seal yields and reduces the lateral dimension of the water reservoir 6100. This reduces friction during the insertion or removal of the water reservoir 6100 from the humidifier base, thus improving the overall user experience.

[0610] Overflow protection

[0611] In one instance, the water reservoir 6100 can be configured to prevent liquid from flowing out of it, for example, when the water reservoir is displaced and / or rotated from its normal operating orientation.

[0612] In one instance, such as Figures 19C to 19G As shown, the inlet pipe 6120 may include an outer (inlet) end 6124 disposed outside the chamber and an inner (outlet) end 6126 disposed inside the chamber. The inlet pipe 6120 includes an inlet portion 6123 having the inlet end 6124 and an outlet portion 6125 having the outlet end 6126. The bottom of the water reservoir (e.g., conductive portion 6150) includes a bottom surface defining a bottom plane when the water reservoir is in a normal operating orientation (e.g., see...). Figure 19C The bottom plane is basically horizontal. For example... Figures 19C to 19GAs shown, different portions of the inlet pipe 6120 may extend in different directions, for example, changing direction at least at one point along its length. For example, the inlet portion 6123 extends in a plane substantially parallel to the bottom plane, while the outlet portion 6125 extends in a different direction (in this case, the outlet portion 6125 extends in a plane substantially perpendicular to the bottom plane). Different twists and / or bends may be introduced in each portion (or orientation) of the inlet pipe 6120.

[0613] like Figures 19C to 19G As shown, the outlet pipe 6130 may include an outer (outlet) end 6134 disposed outside the chamber and an inner (inlet) end 6136 disposed inside the chamber. Similar to the inlet pipe, the outlet pipe may also extend in different directions, for example, changing direction at least at one point along its length. Likewise, the outlet pipe 6130 may include a vertical twist (a bend in a plane substantially perpendicular to the bottom plane), such that the outlet pipe 6130 bends downward from the outlet end 6134 to the inlet end 6136, thereby allowing the outlet pipe 6130 to cross below the inlet portion 6123 of the inlet pipe 6120. Furthermore, the opening at the inlet end 6136 of the outlet pipe 6130 bends upward to prevent splashing (which occurs when water is pushed out of the outlet pipe due to pressure and flow).

[0614] Figure 19D , 19H-1 Figures 19H-2 and 19I show the changes in orientation of the inlet and outlet pipes in the horizontal plane, while... Figure 19C , 19E 19F shows a similar turn in the vertical direction (the corresponding tube effectively moves closer to or further away from the bottom surface provided by the conductive part 6150).

[0615] In one example, the outlet end 6126 of the inlet pipe 6120 and the inlet end 6136 of the outlet pipe 6130 may be arranged at or near the geometric center or centroid of the reservoir chamber.

[0616] The inlet pipe 6120 and outlet pipe 6130 may be further arranged such that when: (1) the water reservoir is in the working orientation, and (2) the water reservoir is rotated 90 degrees from the working orientation in at least one direction, at least one of the following (and preferably at least two) is above the horizontal height of a predetermined maximum water volume:

[0617] a. The outer (inlet) end 6124 of the inlet pipe 6120;

[0618] b. The inner (outlet) end 6126 of the inlet pipe 6120;

[0619] c. The outer (outlet) end 6134 of the outlet pipe 6130; and

[0620] d. The inner (inlet) end 6136 of the outlet pipe 6130.

[0621] Depending on the arrangement of the inlets / outlets and their horizontal and vertical positions, in some instances, when the reservoir is rotated 90 degrees, at least one (or both) of the same inlets / outlets will rise above the water level. In other arrangements, in the operating configuration, at least one (or both) inlets / outlets will rise above the water level, while when the water reservoir is tilted 90 degrees, at least one other (or both) inlets / outlets will rise above the water.

[0622] For example, Figure 19C It is shown that inlet end 6124, outlet end 6126, outlet end 6134, and inlet end 6136 are all positioned above the water level in terms of their operational orientation. Figure 19D This shows that when the water reservoir is rotated forward 90 degrees, outlet ends 6126 and 6134 are above the water level, while Figure 19D This shows that when the water reservoir is rotated 90 degrees backward, inlet ends 6124 and 6136 are above the water level. Furthermore, Figure 19G This diagram shows that at least the outlet end 6126 is horizontal when the water reservoir is rotated 180 degrees. This arrangement provides overflow protection to prevent water from entering the inlet and outlet pipes of the water reservoir in any orientation. Additionally, as... Figure 19C and 19I As shown, in the operating configuration, the inlet pipe 6120 is inclined such that its inlet 6124 is higher than its outlet end 6126. Therefore, when the water reservoir returns to its operating configuration, after it has been filled (and during rotation at various angles, including at least 90 degrees in any direction), the water in the inlet pipe drips downwards towards the outlet end (water chamber) rather than the inlet end (which is in the direction of the RPT device). This prevents damage to the electronics in the RPT device when the water reservoir is received in the reservoir base.

[0623] As described above, the inlet pipe 6120 and outlet pipe 6130 for the water reservoir can be curved and extend in different directions, such as bending in one or more planes. The curved pipes 6120 and 6130 allow for greater control and flexibility in positioning the pipe inlet and outlet in preferred locations within the water reservoir, i.e., improved water overflow protection. The curved pipes 6120 and 6130 allow for better utilization of space within the water reservoir and better integration of all reservoir components into a single unit, and allow for greater flexibility in defining the airlock characteristics of the reservoir. In one example, the inlet pipe 6120 and / or outlet pipe 6130 can also vary their diameter along their length (e.g., see...). Figure 19D For example, to provide flexibility in positioning the pipes within the water reservoir.

[0624] As described above, the overflow feature involves inlet and outlet pipes 6120, 6130, whose outlet ends 6126 / inlet ends 6136 are located in the middle of the water reservoir (e.g., at or near the geometric center or centroid of the reservoir chamber), such that if the water reservoir accidentally tumbles at various angles, while the reservoir still contains a certain amount of water, the water level remains mostly below the level of the outlet ends 6126 / inlet ends 6136 of these centrally located inlet pipes 6120 and 6130. This is where the bend in the pipes can help. In particular, if one pipe is guided such that its outlet end 6126 / inlet end 6136 is located in the center of the water reservoir, the other pipe may not simply extend below the first pipe (thus moving away from the central region of the water reservoir), but may be guided to bend below the first pipe and then bend back to any desired level.

[0625] In alternative designs, the pipes can simply cross each other at different heights. This design defines two sides of the reservoir, and when the reservoir is tilted on one of these sides, one of the inlet or outlet pipes tilts upward, thus keeping the corresponding in-tank opening above the water level. In this case, the other pipe would tilt downward, and the in-tank opening might be exposed to water unless mitigation measures are taken. The curved design of this technology can alleviate this problem.

[0626] The bends in the inlet pipe 6120 and / or outlet pipe 6130 can be shallow or significant. To optimize the internal space of the tank, the bends can also occur in more than one plane. The concept of pipe bending can be further enhanced by introducing a second bend after the first bend, which can change the direction or at least the radius of the first bend. The premise behind this shape is that they can introduce further resistance to the propagation of water in certain directions. Therefore, this continuous “knot” extending in one or more planes / directions can provide resistance in the corresponding one or more directions, thus preventing the reservoir from tumbling / tumbling / overturning. Of course, this benefit can be weighed according to the complexity of the design and the resistance provided to the airflow.

[0627] Therefore, the curved pipes within the reservoir can improve the reservoir's water overflow characteristics and make better use of space. This allows for internal optimization of the reservoir and a reduction in its overall volume. Improved overall efficiency allows for the storage of more water or a reduction in the overall size of the water reservoir. Similar results can be achieved by changing the direction of the pipe at discrete angles at desired points along its length, instead of introducing continuous bends.

[0628] In one example, the inlet pipe 6120 and / or the outlet pipe 6130 may be provided as separate and distinct structures from the reservoir cover 6114 (see, for example, the following description). Figure 19H-1 , 19H-2 And 19I), and then fixed or otherwise positioned on the reservoir cover 6114 in an operating position. Alternatively, the inlet pipe 6120 and / or the outlet pipe 6130 may be formed (e.g., molded) as part of the reservoir cover 6114 or the reservoir base 6112 (e.g., see 19I). Figures 134 to 136 These figures illustrate an inlet pipe 6120 and an outlet pipe 6130 formed as part of a reservoir cap 6114. In one example, the inlet pipe 6120 and / or the outlet pipe 6130 may comprise a different material from the reservoir cap (e.g., a more flexible material), such as silicone or TPE, to facilitate bending into a desired configuration. Alternatively, the inlet pipe 6120 and / or the outlet pipe 6130 may comprise a material similar to the reservoir cap, such as polycarbonate.

[0629] For example, Figure 19H-1 and 19H-2 A removable outlet pipe arrangement for a water reservoir according to an example of the present technology is shown. As shown, the removable outlet pipe arrangement includes an outlet pipe 6130 and a portion of an inlet pipe 6120, such as the outlet end 6126 of the inlet pipe 6120. In this example, the inlet portion 6123 and the outlet portion 6125 of the inlet pipe 6120 may be formed (e.g., molded) as part of a reservoir cover 6114. The removable outlet pipe arrangement is formed as a separate and distinct structure from the reservoir cover 6114 and is then secured or otherwise assembled to the reservoir cover 6114 to form complete inlet and outlet air paths. For example, the outlet end 6134 of the outlet pipe 6130 is secured or otherwise anchored to a side wall of the reservoir cover 6114, and the outlet end 6126 is engaged or otherwise anchored to the end of the outlet portion 6125 of the inlet pipe 6120. Figures 19A to 19G The arrangement of the removable outlet pipe in the operating position, which is fixed to the reservoir cover 6114, is shown.

[0630] Figure 19I An alternative example is shown in which the inlet pipe 6120 and the outlet pipe 6130 include removable inlet and outlet pipe arrangements that are separate and distinct from the reservoir cover 6114 and are then fixed or otherwise positioned on the reservoir cover 6114 in an operating position.

[0631] Hinged connection between the reservoir cover and the reservoir base

[0632] Figures 82 to 97A reservoir 6100 according to an example of the present technology is shown, which includes a reservoir cover 6114 that is hinged to the reservoir base 6112 in a removable manner.

[0633] As shown in the figure, the water reservoir 6100 includes a hinged joint between a cover 6114 and a base 6112, which allows the cover 6114 to be in the open position (see Figure 6112). Figure 84 and 89 ) and closing position (see Figure 82 , 83 It moves hingedly between (91) and (91).

[0634] In the example shown, each side of the cover 6114 includes a hinge arm 9100 with an inwardly extending hinge pin 9105 (see [link]). Figure 86 and 87 Each hinge pin 9105 is configured to engage with a slot or cavity 9200 provided on a corresponding end opening on each side of the base 6112 (see [link]). Figure 86 and 88 ).

[0635] Each hinge pin 9105 (see Figure 87 The segmented cylindrical shape includes a cylindrical surface 9105c for hinged movement and a flat surface 9105f for each hinge pin 9105 to engage with a slot 9200 at a corresponding end opening (see [link]). Figure 88 Joining / unjoining. That is, as in... Figure 90 As shown, the main part of the cross-section of each hinge pin 9105 is circular.

[0636] Each end-opening slot 9200 provides a segmented cylindrical surface 9200c to allow for the articulated movement of the corresponding hinge pin 9105, and the open end or side 9200o provides an opening to facilitate engagement and disengagement of each slot 9200 with the corresponding hinge pin 9105 (see [link]). Figure 88 ).

[0637] like Figure 94 and 95 As shown, to assemble or engage the cover 6114 with the base 6112, the cover 6114 is oriented such that each hinge pin 9105 is aligned with a slot 9200 of the corresponding end opening, and then the cover 6114 is pushed toward the base 6112 (e.g., in a generally horizontal direction) until each hinge pin 9105 is pushed into the slot 9200 of the corresponding end opening (e.g., by snap-fit ​​engagement). Because the opening of the slot 9200 is flexible, the hinge pins can achieve snap-fit ​​engagement in any orientation. However, if as... Figure 95As shown, the flat surface 9105f of each hinge pin 9105 is oriented generally horizontally. This allows the smaller width (or diameter) of the cross-section of the main portion of the hinge pin 9105 extending from the flat surface 9105f to the opposing cylindrical surface 9201c to engage with the open end 9200o of the slot 9200, thus facilitating the engagement and disengagement of the cover. This allows the hinge pin 9105 to pass relatively easily through the open end 9200o into the interior of the slot 9200. However, the smaller width of the main portion provided by each of the pair of hinge pins is larger than the opening at the open end or on the open side of the corresponding one of the slots, so that even when aligned, a force must be applied to pry the pair of hinge pins out of the pair of slots by bending each opening outward and releasing the corresponding one of the hinge pins.

[0638] Once assembled, slot 9200 hinges to hold the corresponding hinge pin 9105 to allow cover 6114 to be in the open position (see...). Figure 89 and 90 ) and closing position (see See Figure 91 and 92 It can move hingedly between the two.

[0639] like Figure 82 , 91 As shown in Figure 93, the cover 6114 includes a clip 9120 adapted to releasably interlock with one or more latches 9220 on the base 6112, for example by a snap-fit ​​engagement, to releasably secure or lock the cover 6114 to the base 6112 in a closed position. As shown, the clip 9120 includes at least one slot 9122, for example a pair of slots, adapted to receive a corresponding latch 9220. Figure 83 and 93 As shown, the free end of the clip 9120 includes a finger pull tab 9125, which is angled outward from the base 6112 to allow the user to grip it when they wish to open the cover by releasing the clip 9120. Figure 93 As shown, in some embodiments, a small gap G, such as 0.2 mm, may be present between the bottom of each latch 9220 and the slot 9122 in the clip 9120, such that the latch 9220 is not under a constant load when the cover is in the closed and locked position. However, typically, the peripheral spring-back support member 6096 pushes the cover upward, thus pushing the bottom of each latch 9220 upward, thereby eliminating this gap.

[0640] like Figure 96 and 97As shown, in order to remove or detach the cover 6114 from the base 6112, the cover 6114 is overextended or hingedly moved beyond the fully open position (i.e., far beyond the rotation stop provided by the stop member 9110). In the fully open position, the minimum dimension of the segmented cross-section of the hinge pin is generally aligned with the opening 9200o in the corresponding slot. When the cover is pushed further back, the stop member 9110, which engages with the sidewall 9210, begins to act as a cantilever and pushes the hinge pin toward the opening 9200o. This causes the opening 9200o to bend and release the hinge pin 9105 from the corresponding slot 9200. The segmented cross-section of the opening 9200o and the hinge pin is not strictly required, because continued backward pushing will eventually allow the stop member 9110 to pry the hinge pin out of the slot 9200, even without the opening or the segmented cross-section. However, when the lid 6114 is overextended, arranging the smaller width or diameter of the opening and the main portion provided by the hinge pin 9105 at the opening end 9200o of the slot 9200 does indeed make the lid easier to remove; that is, the flat surface 9105f of the hinge pin 9105 reduces the stress on the hinge when the flat surface 9105f of the hinge pin 9105 is pulled out or popped out of the slot 9200. Furthermore, providing the opening 9200o changes the location of accumulated stress. In particular, when the lid is removed by prying the hinge pin out of the slot 9200, the stress is typically concentrated in the side 9100 of the lid. Conversely, when the opening 9200o is provided, when the lid is removed by prying the hinge pin out of the slot 9200, the stress is typically concentrated in the portion of the barrel base defining the opening 9200o, because this portion must bend to increase the side of the opening in order to release the hinge pin and remove the lid.

[0641] like Figure 86 and 97 As shown, the lid 6114 includes a stop member 9110, which is adapted to engage the sidewall 9210 of the base 6112 when the lid 6114 reaches the fully open position, for example, allowing the lid 6114 to rest in the fully open position. In one example, when in the fully open position, the lid 6114 can be oriented at a distance of slightly less than 90 degrees from the base 6112, for example, about 80-90 degrees. In this position, the lid is well balanced so that it will not fall forward and close the bucket, while it will not press backward against the bucket and cause the bucket to tilt laterally.

[0642] In an alternative example, the positions of the hinge pin 9105 and the slot 9200 can be switched; for example, the hinge pin 9105 can be located at the base 6112 while the slot 9200 can be located at the cover 6114.

[0643] 5.6.2.2 Storage base

[0644] exist Figure 20AIn the illustrated example, the reservoir base 6050 is disposed on the chassis assembly 7300 of the RPT device and is configured and arranged to receive the water reservoir 6100. In some arrangements, the reservoir base 6050 may include locking features, such as locking levers or tabs, configured to retain the water reservoir 6100 in the reservoir base 6050.

[0645] The reservoir base 6050 includes a body that forms a cavity for receiving the water reservoir 6100. (As...) Figure 20F and 21 As best shown, the rear wall of the reservoir base 6050 includes a chassis outlet 7320 (also referred to as a base inlet), which is configured and arranged to receive a pressurized airflow from the outlet of the RPT device for delivery to the water reservoir 6100. The reservoir base 6050 may also include a base outlet 6090, which is configured and arranged to connect to or otherwise dock with an air delivery conduit 4170 or an intermediate component, which is then connected to the air delivery conduit 4170. In one embodiment of the art, the reservoir base 6050 may allow a direct pneumatic connection between the air delivery conduit 4170 and the water reservoir 6100, such that a pressurized airflow already humidified in the water reservoir 6100 is delivered directly from the water reservoir 6100 to the air delivery conduit 4170.

[0646] The main body of the reservoir base 6050 includes multiple walls and heating elements (e.g., heating plate 6080), which are disposed at the bottom of the walls to form a cavity for receiving the water reservoir 6100.

[0647] Connection between water storage tank and storage tank base

[0648] In use, the water reservoir 6100 is inserted into the reservoir base 6050, and the water reservoir 6100 is removably connected to the reservoir base 6050. When the water reservoir is arranged for direct engagement (pneumatic seal) with the air delivery duct 4170, the water reservoir 6100 is connected to the reservoir base 6050 (e.g., see...). Figure 21In this case, the inlet seal 6122 of the inlet pipe 6120 (or inlet) of the water reservoir 6100 is configured and arranged to provide a face seal with the chassis outlet 7320 (base inlet) of the reservoir base 6050. Similarly, the outlet seal 6132 of the outlet pipe 6130 (or outlet) of the water reservoir 6100 is configured to provide a face seal with the air circuit or air delivery pipe 4170, for example, to prevent pneumatic pressure loss due to leakage. In the example shown, the water reservoir 6100 is configured and arranged to form a direct pneumatic seal with the air delivery pipe 4170, completely bypassing the RPT device and the reservoir base 6050. The reservoir base 6050 facilitates this direct connection, but is not part of it. Connections other than pneumatic connections can be achieved between the delivery pipe and the water reservoir base. For example, the air delivery pipe can be configured and arranged to form a releasable mechanical / locking connection and / or electrical connection with the water reservoir base. Releasable mechanical (locking) connections may include snap-fit ​​connections.

[0649] Removing the RPT unit and reservoir base 6050 from the air delivery path eliminates the internal connecting parts between the water reservoir 6100 and the air delivery duct 4170. This eliminates the need to disassemble and sterilize such connecting parts, making sterilization easier. Thus, when preparing the unit for different users, the water reservoir 6100 is the only part of the RPT unit that needs to be replaced or sterilized.

[0650] When the water reservoir 6100 is inserted into the reservoir base 6050 and reaches the operating position, the conductive portion 6150 of the water reservoir 6100 aligns and thermally contacts the heating plate 6080 of the reservoir base 6050 to allow heat to be transferred from the heating plate 6080 to the water in the water reservoir 6100, for example, by the surface of the conductive portion 6150 engaging or contacting the surface of the heating plate 6080. A biasing mechanism can be introduced to press the water reservoir and the heating plate toward each other, thereby altering the level of thermal contact between the conductive portion and the heating plate. In one example, spring elements disposed in the water reservoir, the reservoir base, and / or the heating plate can be arranged to bias the water reservoir and the heating plate toward each other to increase contact pressure and improve thermal contact.

[0651] For example in Figure 21 The chassis outlet 7320 (base inlet) shown is configured to receive a pressurized airflow from the blower of the RPT device and deliver that airflow to the water reservoir 6100 via the inlet pipe 6120. As the air passes through the water reservoir 6100, moisture (i.e., water vapor) is added to the airflow, and the humidified airflow then exits the water reservoir through the outlet pipe 6130. Air flows directly from the outlet pipe 6130 into the air delivery pipe 4170 to deliver the humidified airflow to the patient.

[0652] Guide structure for insertion / removal

[0653] In one example, the outer portion of the water reservoir 6100 provides a base engagement portion, which is configured and arranged to mate and engage with a reservoir engagement portion of the reservoir base 6050. In one example, the water reservoir 6100 and the reservoir base 6050 may include guide structures to facilitate insertion, removal, and alignment of the water reservoir 6100 with the reservoir base 6050.

[0654] For example, such as Figure 6B As shown, the water reservoir 6100 may include guide surfaces (e.g., provided by guide rail 6200) along opposite sides of the base engagement portion. These guide surfaces are arranged to engage corresponding guide surfaces (e.g., provided by guide slot 6060) along the reservoir engagement portion of the reservoir base 6050 to guide the water reservoir 6100 into the reservoir base 6050.

[0655] In one instance, such as Figure 6B As shown, the water reservoir 6100 can be inserted (e.g., by sliding or pushing / pulling only) into and removed from the cavity of the reservoir base 6050 along a path extending in the lateral direction (i.e., the front-to-back direction).

[0656] In an alternative example, at least a portion of the path for inserting / removing the water reservoir may extend in a down-up direction, for example, at least a portion of the path for inserting the water reservoir into the base includes a ramp leading to the operating position, such as an elevation or descent.

[0657] For example, the guide structures of the water reservoir 6100 and the reservoir base 6050 can be configured and arranged to provide an initial horizontal or inclined insertion of the water reservoir, followed by descent to the operating position in the final section. In one example, the reservoir base may provide an inclined surface with an inner edge located on the bottom surface of the base, which the water reservoir must pass over before falling to its operating position. This crossed edge and / or the fall itself can effectively lock the water reservoir in the operating position. Other locking features may also be used. This "push and drop" structure includes the movement of a bucket having components in both the horizontal and vertical directions. Optionally including the edge ensures that during the insertion of the water reservoir into the reservoir base, the base of the water reservoir engages with a single edge or small surface, rather than being dragged over a much larger surface. This reduces wear and potential damage to the heating plate. Spring elements may be arranged (e.g., between the reservoir base and the water reservoir) to increase the contact pressure between the water reservoir and the heating plate, for example, to improve thermal contact between the base plate of the water reservoir and the heating plate of the base.

[0658] Figures 25A to 27B A guide structure according to an example of the present technology is shown, which facilitates the insertion, removal, and alignment of the water reservoir 6100 with the reservoir base 6050. In the illustrated example, the engagement path for inserting / removing the water reservoir 6100 extends in both the front-rear and bottom-up directions; that is, the engagement path includes both horizontal and vertical components.

[0659] In the illustrated example, each side of the reservoir base 6050 includes a guide slot 6060 configured to receive a corresponding guide protrusion or pin 6250 on each side of the water reservoir 6100. As shown, each guide slot 6060 includes a generally horizontal section 6060H extending in a front-to-back direction, leading to a drop section 6060D that slopes downwards from the generally horizontal section 6060H.

[0660] like Figures 28A to 28C As shown, the reservoir base 6050 includes a recessed heating element 6085 configured to engage the conductive portion 6150 of the water reservoir 6100 to allow heat transfer from the heating element 6085 to a volume of liquid in the water reservoir 6100. As also shown, the chassis assembly forming the reservoir base 6050 includes a recessed opening adapted to receive the heating element 6085 (e.g., a heat-generating component, such as a resistive heating track). The recessed opening is formed at least partially by a front flange 7350 of the chassis assembly located at the front end or open end of the reservoir base 6050 and a rear flange 7360 of the chassis assembly located at the rear or interior of the reservoir base 6050. The heating element 6085 is securely fixed or held in place by a retaining plate 6095, which is configured and arranged to clamp the heating element 6085 onto the chassis assembly, for example, at least onto the front and rear flanges 7350, 7360 of the chassis assembly. In one example, the heating element 6085 may include a gasket 6086, such as a silicone bead, along its periphery to seal the heating element 6085 within a recessed opening in the chassis assembly.

[0661] The conductive portion 6150 of the water reservoir 6100 (e.g., a metal plate) may include a stepped arrangement, wherein the conductive portion 6150 extends in more than one plane. In one example, see, for example, [link to example]. Figure 29 The conductive portion 6150 includes a first heat-conducting portion 6150.1 extending in a first plane, and a second portion 6150.2 extending in a second plane offset in an upward direction from the first plane. Each of more than one plane may, but is not required, extend in a horizontal plane (refer to the operating configuration of a water reservoir).

[0662] The recessed configuration of the reservoir base 6050 and the water reservoir 6100 allows the water reservoir 6100 to fall onto the heating element 6085 and enter its operating position. Specifically, when the water reservoir 6100 is inserted into the reservoir base 6050, the guide pin 6250 of the water reservoir 6100 engages within a corresponding guide slot 6060 of the reservoir base 6050 (see, for example, see...). Figure 25B and 26A The generally horizontal section 6060H of the guide slot 6060 guides the water reservoir to the reservoir base, i.e., in the forward direction. As the water reservoir 6100 is guided along the generally horizontal section 6060H of the guide slot 6060, the first heat-conducting portion 6150.1 of the conductive portion 6150 of the water reservoir 6100 engages with and slides along the upper guide surface 7355 of the front flange 7350 supporting the heating element 6085 (see, for example, see...). Figure 27A When the water reservoir 6100 reaches the drop section 6060D of the guide slot 6060, the first heat-conducting portion 6150.1 of the water reservoir 6100 also crosses the inner edge of the front flange 7350, causing the water reservoir 6100 and its first heat-conducting portion 6150.1 to fall into contact with the heating element 6085 (see, for example, see...). Figure 25A , 26B And 27B). That is, the stepped arrangement of the conductive portion 6150 of the water reservoir 6100 is configured to allow the first heat-conducting portion 6150.1 to fall to engage with the recessed heating element 6085, while the second (generally non-heat-conducting) portion 6150.2 falls to engage with the front flange 7350 (see, for example, 27B). Figure 27B This drop-engagement configuration effectively locks the water reservoir 6100 in the operating position, i.e., the front flange 7350 provides a guide surface 7355, and also allows the water reservoir 6100 to engage thereafter to lock the water reservoir 6100 in place and prevents accidental release, for example, during treatment when the entire system is under pressure that could push the water reservoir out of its operating configuration. In the example shown, the size of the first heat-conducting portion 6150.1 of the water reservoir 6100 is determined to substantially fill the recessed heating element 6085 (e.g., see...). Figure 27B The recessed space provided, for example, to prevent any horizontal movement.

[0663] As the water reservoir 6100 slides across the front flange 7350 during engagement, instead of sliding along the heating element 6085, the engagement portion of the bottom surface of the water reservoir 6100 (which may include one or both of the heating plate and the remainder of the bottom wall of the water reservoir) engages on a much smaller surface at the bottom of the base, thus reducing wear and potential damage to the water reservoir 6110 (i.e., its conductive portion 6150) and the heating plate. Furthermore, as the water reservoir 6100 falls onto the heating element 6085 to enter its operating position, instead of sliding on the heating element 6085, in some configurations, the heating element 6085 may have a heating plate (also called a wear plate or slide plate, for example formed of a hard metal material) provided along its upper surface or on its upper surface to protect the heating element 6085. That is, this joint structure allows the conductive portion 6150 of the water reservoir 6100 to be directly connected to the heating element 6085, so that heat is transferred directly from the heating element 6085 to a certain volume of liquid in the water reservoir 6100, thereby improving thermal conductivity because heat does not need to pass through a heating plate or slide plate. Such an arrangement can also be more cost-effective.

[0664] exist Figure 27A and 27B In the example shown, the upper wall portion of the reservoir base includes a spring-loaded latch 6300, which is arranged to increase the contact pressure between the water reservoir 6100 and the fixed heating element 6085, for example, to improve thermal contact. As shown, when the water reservoir 6100 reaches its operating position, the spring-loaded latch 6300 is arranged to resiliently engage the top of the water reservoir 6100 to bias the water reservoir 6100 downward into the fixed heating element 6085 (see, for example, [reference needed]). Figure 27B To remove it, the water reservoir 6100 can be subjected to downward pressure against the spring-loaded latch 6300 until it reaches the approximately horizontal section 6060H of the guide slot 6060 for removal.

[0665] It should be understood that a downward force can be applied to the water reservoir 6100 in other suitable ways. For example, the guide slot of the reservoir base may include a spring or other biasing member arranged to apply a downward force, for example, to a guide pin of the water reservoir. In another example, the chassis assembly may include a hinged cover of the reservoir base configured to move downward to engage with the water reservoir after the water reservoir is inserted to provide a downward force. In yet another example, the chassis assembly may include a plunger-type element adjacent to the reservoir base, configured to be pressed into engagement with the water reservoir after the water reservoir is inserted to provide a downward force.

[0666] In an alternative embodiment, the water reservoir 6100 and reservoir base 6050 can be arranged such that the water reservoir 6100 can first fall to engage with the heating element 6085, and then can further slide along the heating element 6085 to engage with the spring-loaded latch 6300. In this embodiment, as... Figures 30 to 32B As shown, each guide slot 6060 includes an additional, generally horizontal segment 6060H2 extending from the drop segment 6060D. Furthermore, the size of the first heat-conducting portion 6150.1 of the conductive portion 6150 of the water reservoir 6100 can be reduced such that the first heat-conducting portion 6150.1 does not fill the recessed space provided by the recessed heating element 6085, for example, to allow for horizontal movement. In use, when the water reservoir 6100 reaches the drop segment 6060D of the guide slot 6060, the first heat-conducting portion 6150.1 of the water reservoir 6100 crosses the inner edge of the front flange 7350 and drops to engage with the heating element 6085. The water reservoir 6100 can then slide further along an additional generally horizontal section 6060H2 into the reservoir base 6050 until the water reservoir 6100 slides below the spring-loaded latch 6300 and engages with the spring-loaded latch 6300 (see, for example, see...). Figure 32B For removal, the water reservoir 6100 can be moved horizontally along the additional generally horizontal section 6060H2 to disengage from the spring-loaded latch 6300 until it reaches the drop section 6060D, where the water reservoir 6100 can be pulled upward away from the reservoir base 6050 along the drop section 6060D and the generally horizontal section 6060H without pressure from the spring-loaded latch 6300.

[0667] Figure 80 , 81 Figures 91 and 98 to 101 show a guide arrangement for facilitating the insertion, alignment, and engagement of the water reservoir 6100 with the reservoir base 6050, according to another example of the present technology.

[0668] In the illustrated example, the water reservoir 6100 includes a pair of guiding or biasing rails 6200. As shown, each of the rails 6200 is disposed on a corresponding side of the opposite side of the base 6112 of the water reservoir 6100. When the water reservoir 6100 is inserted into the reservoir base 6050, each of the rails 6200 is configured to engage with a corresponding one of a pair of guide slots 6060 disposed on the opposite side of the reservoir base 6050 to guide the water reservoir 6100 to the reservoir base 6050.

[0669] Each of the pair of guide rails 6200 includes an upper edge providing an upwardly oriented surface 9300 (referring to the operating orientation of the reference device), and each of the pair of guide slots 6060 includes an upper edge providing a downwardly oriented surface 9400 (see [reference]). Figure 81 , 98 (and 99). When the water reservoir 6100 is inserted into the reservoir base 6050, the guide slot 6060 is arranged to receive the guide rail 6200 and guide the water reservoir 6100 into the base 6050. In addition to this guiding function, there is an additional biasing function provided by the guide slot 6060. In particular, the upward-oriented surfaces 9300 of the guide rail 6200 are configured to at least along them... Figure 81 The final portion of the axial movement indicated by the arrow engages with the corresponding downward-oriented surface 9400 of the slot 6060 and is pushed or forced downward. This downward pressure forces or presses down on the water reservoir 6100 so that its heat-conducting portion 6150, which enhances its operational configuration, abuts against the heating plate 6080 of the heating assembly 6075 disposed at the bottom of the reservoir base 6050 (see...). Figure 98 and 99 ).

[0670] Each of the guide rails 6200 may include one or more engagement tabs 9315 extending from its upwardly oriented surface 9300 (e.g., as shown in the image). Figure 81 , 82 (As shown in 89, a single engaging tab), engaging tab 9315 is configured to engage the downward-oriented surface 9400 of the corresponding slot 6060. This engagement enhances the displacement of the water reservoir 6100 toward the heating assembly 6075, thereby enhancing the abutment with the heating plate 6080 of the heating assembly 6075. The tab may be located on the associated downward-oriented surface 9400, rather than on the upward-oriented surface 9300. Providing such a tab on one of the engaging surfaces between the guide rail 6200 and the slot 6060 ensures less friction because only an area of ​​a single tab mechanically engages with the opposing surface, rather than the entire surface. This allows the water reservoir 6100 to be inserted into or withdrawn from the base 6050 more smoothly, improving the user experience.

[0671] In the illustrated example, the front side or edge of the water reservoir 6100 also includes one or more biasing edges or tabs 9320 (e.g., as shown in the example). Figure 80 The pair of bias tabs shown in the diagram, with the bias edge or tab 9320 configured to engage with one or more adjacent edges 9450 (e.g., as shown in the diagram). Figure 112Below the corresponding one of the pair of adjacent edges shown, adjacent edge 9450 is disposed on the rear wall of reservoir base 6050 (below chassis outlet 7320 and base outlet 6090). When water reservoir 6100 is fully inserted into base 6050, this engagement locks the front end of water reservoir 6100 and biases water reservoir 6100 downward to enhance the abutment of its conductive portion 6150 with the heating plate 6080 of heating assembly 6075 disposed at the bottom of reservoir base 6050 (see...). Figure 100 and 101 ).

[0672] In other words, pushing the slot 6060 downwards onto the corresponding guide rail 6200 (located at the middle of the rear of the water reservoir 6100, where the front end is arranged to first engage with the reservoir base 6050) is supplemented by pushing the adjacent edge 9450 downwards onto the corresponding biasing tab 9320 located in front of or on the front side of the water reservoir 6100. When the water reservoir 6100 is almost completely inserted into the reservoir base 6050, the adjacent edge 9450 engages with the corresponding biasing tab 9320 (see [link to relevant documentation]) near the end of the engagement process. Figure 101 The upward-oriented surface 9325 of the pair of biasing tabs 9320 engages. At this point, the pair of biasing tabs 9320 are pushed below the corresponding adjacent edges in the adjacent edges 9450, which are generally horizontally oriented. The adjacent engagements are configured and arranged to balance the upward biasing force provided by the heating assembly 6075 located at the bottom of the reservoir base 6050 (see, for example, see...). Figure 98 As described in more detail below, the heating plate 6080 of the heating assembly 6075 is suspended on a spring-loaded seal and support member 9500, which is constructed and arranged to bias the heating plate 6080 upward against the conductive portion 6150 of the water reservoir 6100 when the water reservoir 6100 is inserted into the reservoir base 6050. Therefore, the upward bias provided by the spring-loaded seal and support member 9500 pushes the heating plate 6080 from below, which in turn pushes the water reservoir 6100 against the guide rail 6200 against the corresponding slot 6060 and against the biasing tab 9320 against the corresponding adjacent edge 9450. This arrangement ensures full contact between the conductive portion 6150 of the water reservoir 6100 and the heating plate 6080 of the water reservoir 6100.

[0673] In the illustrated example, slot 6060 and adjacent edge 9450 are arranged generally horizontally (e.g., generally parallel to heating plate 6080), an arrangement that allows water reservoir 6100 to be inserted (e.g., by sliding or pushing / pulling only) into and removed from cavity of reservoir base 6050 along a path extending in the lateral direction (i.e., front-to-back direction). However, in an alternative example, at least a portion of slot 6060 and / or adjacent edge 9450 may include a ramp, such that at least a portion of the path for insertion / removal may extend in the down / up direction.

[0674] In addition, such as Figure 102 As shown, the cover 6114 of the water reservoir 6100 includes one or more retaining protrusions 6115 (e.g., as shown in the image). Figure 80 and Figure 85 A pair of retaining protrusions (shown) are configured and arranged to releasably engage corresponding base locking edges or locking recesses 6051 in the reservoir base 6050 to releasably lock and retain the water reservoir 6100 in an operating position within the reservoir base 6050, i.e., each protrusion 6115 engages behind the front end forming the recess 6051. The protrusions 6115 may include a tapered shape to facilitate engagement of the protrusion 6115 into the corresponding recess 6051. For release, the water reservoir 6100 can be compressed (i.e., by pressing the cap 6114 against the base 6112) to compress the deformable seal 6116 and allow the protrusions 6115 to lower or fall below the front end of the recess 6051. This locking arrangement ensures that the positive pressure inside the assembled RPT device, when in its operating configuration, will not push the water reservoir backward and disengage it from the operating engagement with the reservoir base 6050, thus ensuring reliable operation of the device.

[0675] Preserve characteristics

[0676] In one instance, such as Figures 33A to 33F As shown, the water reservoir 6100 may include a latch 6400 configured to releasably engage a recessed slot 6055 in the reservoir base 6050 to releasably hold the water reservoir 6100 in an operational position within the reservoir base 6050. This locking arrangement prevents the water reservoir from detaching from the base, which, in some arrangements, may be dislodged by relatively high operating pressures within the base during operation of the device.

[0677] In the illustrated example, latch 6400 is provided as a separate and distinct structure from water reservoir 6100, and is then secured or otherwise positioned in an operational position on water reservoir 6100. For example, latch 6400 includes a pre-formed structure secured to reservoir cover 6114 or other portions of water reservoir 6100. In one example, latch 6400 comprises a plastic or thermoplastic polymer material.

[0678] like Figure 33E and 33F As shown, the latch 6400 includes a locking lever 6402, a cover connector 6404, and a support member 6406 that resiliently supports the locking lever 6402 to the cover connector 6404.

[0679] like Figure 33G As shown, the reservoir cover 6114 includes a recess 6260 to receive a latch 6400. Each side of the recess 6260 includes a guide rail 6262, and the bottom of the recess includes a locking tab 6264. Each guide rail 6262 forms a slot configured to receive a corresponding side of the cover connector 6404. The cover connector 6404 is guided by the guide rail 6262 into the recess 6260 until the slotted end 6405 of the cover connector 6404 engages behind the locking tab 6264 to secure the latch 6400 to an operating position on the reservoir cover 6114, see, for example, [reference needed]. Figure 33C and 33D .

[0680] The locking lever 6402 includes a retaining protrusion 6403 at one end and a finger / thumb gripping portion 6407 at the other end. The locking lever 6402 is supported by a spring-loaded support member 6406, such that the retaining protrusion 6403 is resiliently biased to the locked position.

[0681] When the water reservoir 6100 reaches the operating position in the reservoir base 6050, the retaining protrusion 6403 of the latch 6400 is configured and arranged to engage above and behind the front flange of the recessed slot 6055 forming in the reservoir base 6050, for example, see Figure 33B The retaining protrusion 6403 includes a tapered shape to facilitate engagement of the retaining protrusion 6403 into the recessed slot 6055. This connection releasably secures the water reservoir 6100 to the reservoir base 6050. The finger / thumb grip 6407 can be manually pressed down to pivot the locking lever 6402, thus pivoting the retaining protrusion 6403 against external bias of the member 6406 to the unlocked position, i.e., pivoting the retaining protrusion 6403 out of the recessed slot 6055 to allow removal of the water reservoir 6100 from the reservoir base 6050.

[0682] Connection between air delivery pipe and storage tank base

[0683] In one instance, for example, such as Figure 20A and 23A As shown in 24B, the air delivery tube 4170 includes a tube portion 4500, a base connector / set 4600 (outlet connector) for connecting the air delivery tube 4170 to the reservoir base 6050 and / or the water reservoir 6100, and a patient interface connector / set 4700 (inlet connector) for connecting the air delivery tube 4170 to the patient interface 3000.

[0684] In one example, the base connector 4600 is constructed and arranged to form a mechanical and electrical connection with the reservoir base 6050 and a pneumatic connection with the water reservoir 6100 and / or the reservoir base 6050. These connections position and secure the air delivery conduit 4170 to the reservoir base 6050 or the water reservoir 6100, provide electrical, information, and control signals to the heating element and converter associated with the air delivery conduit 4170, and allow humidified and pressurized gas to flow from the water reservoir 6100 to the patient interface 3000. During the engagement of the air delivery conduit 4170 with the water reservoir 6100 and the reservoir base 6050, these connections can be formed simultaneously or sequentially; for example, one of the mechanical, pneumatic, or electrical connections may be completed before the others.

[0685] The base connector 4600 of the air delivery pipe 4170 includes a retaining feature that provides a fixed, non-rotatable connection to the base outlet 6090 of the reservoir base 6050.

[0686] In one instance, such as Figure 23A and 23B As shown, the retaining features of the base connector 4600 include a pair of resilient, quick-release clamping arms 4610, i.e., cantilevered spring arms or clamping buttons. Each spring or clamping arm 4610 may include a barb end or protrusion configured to provide a snap-fit ​​connection with the base outlet 6090. In one example, the base outlet 6090 may include a locking member (e.g., a slot) configured and arranged to receive a corresponding barb end of the clamping arm 4610.

[0687] The free end of the base connector 4600 includes an outwardly extending flange or lip 4620 surrounding the pipe opening. The flange or lip 4620 provides a generally flat contact surface 4625. When the base connector 4600 is connected to the base outlet 6090, the free end of the base connector 4600 and its contact surface 4625 protrude into the cavity of the reservoir base 6050 to allow engagement with the outlet pipe 6130 of the water reservoir 6100, for example, as... Figure 22C As shown.

[0688] exist Figure 23Aand 23B In one example, the base connector 4600 of the air delivery pipe 4170 includes a longitudinal axis A1 (e.g., aligned with the axis of the pipe, which may also be the axis that engages / disengages with the base outlet 6090) and a contact surface 4625 arranged along axis A2, which extends at an angle of, for example, 45° to the longitudinal axis A1. As described below, this arrangement orients the contact surface 4625 to engage with the water reservoir 6100.

[0689] Figure 20A and 24A Figures 24B show an alternative example of an air delivery conduit 4170 including a base connector 4600 according to the present technology. As shown, each side of the base connector 4600 includes a retaining protrusion 4615 configured to provide a snap-fit ​​connection with a base outlet 6090.

[0690] In one instance, such as Figures 20A to 20C As best shown in 20K and 20L, the base outlet 6090 may include a locking arrangement 6600 for receiving the air delivery tube 4170 and releasably retaining the air delivery tube 4170 in an operating position within the base outlet 6090. As shown, the locking arrangement 6600 includes a button portion 6605 and locking arms 6610 extending from the button portion 6605. Each locking arm 6610 includes a locking tab 6615 arranged to engage a corresponding retaining protrusion 4615 of the base connector 4600. The locking arrangement 6600 is supported near the base outlet 6090 such that its locking arms 6610 and locking tabs 6615 are resiliently biased into a locked position.

[0691] When the base connector 4600 of the air delivery pipe 4170 is inserted into the corresponding base opening 6091 and reaches the operating position in the base outlet 6090 of the reservoir base 6050, the retaining protrusion 4615 of the base connector 4600 is configured and arranged to engage above and behind the corresponding locking tab 6615 of the locking arrangement 6600, for example, see Figure 20K In some arrangements, the base connector 4600 of the air delivery conduit 4170 may need to be inserted into and rotated into the corresponding base opening 6091 to achieve this locking engagement with the locking arrangement 6600. Each retaining protrusion 4615 and / or each locking tab 6615 may include a tapered shape to facilitate engagement into the locked position. This connection secures the air delivery conduit 4170 to the reservoir base 6050 in a releasable manner, see, for example, [reference needed]. Figures 20D to 20H .like Figure 20LAs shown, the button portion 6605 can be manually pressed down to resiliently bend the locking arm 6610 and its locking tab 6615 to resist being biased to the unlock position, i.e., the locking tab 6615 moves laterally outward to disengage from the retaining protrusion 4615 of the base connector 4600, so as to allow the air delivery duct 4170 to be removed from the base outlet 6090 of the reservoir base 6050.

[0692] Once the connection is established, the retaining feature is provided by the base connector 4600 / locking arrangement 6600, and by the base opening 6091 of the base outlet 6090 (see...). Figure 20C The non-circular engagement profile provided by the base connector 4600 provides a fixed, non-rotatable connection between the air delivery conduit 4170 and the base outlet 6090.

[0693] The free end of the base connector 4600 includes an outwardly extending flange or lip 4620 surrounding the pipe opening, see, for example, [reference needed]. Figure 20A , 20G 20I and 20J. A flange or lip 4620 provides a contact surface 4625. When the base connector 4600 is connected to the base outlet 6090, the free end of the base connector 4600 and its contact surface 4625 protrude into the cavity of the reservoir base 6050 to allow engagement with the water reservoir 6100, see, for example, [reference needed]. Figures 20F to 20H .

[0694] Similar to the examples above, Figure 20A and 24A The contact surface 4625 of the base connector 4600 shown in 24B is arranged along an axis that extends at an angle (e.g., 45°) to the longitudinal axis of the tube.

[0695] Water reservoir / air delivery pipe – direct connection at 45°

[0696] The direct pneumatic connection between the water reservoir 6100 and the air delivery duct 4170 has already been discussed above. Figure 18A and 18B In the example shown, the water reservoir 6100 includes an axis A1 (e.g., aligned with the insertion / removal direction), and the outer end of the outlet pipe 6130 (or outlet) and its outlet seal are arranged along an axis A2 extending at an angle (e.g., 45°) to axis A1. As stated above regarding... Figure 23A and 23B As described, the base connector 4600 of the air delivery tube 4170 includes an axis A1 (e.g., aligned with the insertion / removal direction of the air delivery tube 4170), and the contact surface 4625 of the base connector 4600 is arranged along an axis A2 that extends at an angle (e.g., 45°) to the axis A1.

[0697] When the air delivery pipe 4170 is engaged with the base outlet 6090 of the water reservoir 6100 and / or the reservoir base 6050, the outlet pipe 6130 (or outlet) and the outlet seal 6132 of the water reservoir 6100 are configured to sealably engage or mat against the contact surface 4625 along the free end of the base connector 4600 of the air delivery pipe 4170, see, for example, [reference needed]. Figure 21 and 22A To 22C. This engagement provides a face seal between the water reservoir 6100 and the base connector 4600 to seal the outlet flow path, which allows humidified air to flow out of the water reservoir 6100 and into the air delivery tube 4170 for delivery to the patient interface 3000.

[0698] The engagement profile (e.g., 45°) of the outlet pipe 6130 (and outlet seal 6132) and contact surface 4625 allows the water reservoir 6100 to be removed from the reservoir base 6050 while the air delivery pipe 4170 remains attached to the base outlet 6090. Similarly, this 45° angle allows the air delivery pipe 4170 to disengage from the base without requiring the water reservoir 6100 to be removed from the outlet 6090 of the reservoir base 6050. Therefore, the insertion and removal of the water reservoir 6100 can be independent of the connection of the air delivery pipe 4170 to the base outlet 6090; that is, the water reservoir 6100 and the air delivery pipe 4170 can be independently engaged / disengaged from the reservoir base 6050.

[0699] It should be understood that the outlet pipe 6130 (and outlet seal 6132) and the contact surface 4625 can be arranged at other suitable angles so that they can be in direct contact with each other.

[0700] In an alternative embodiment, the air delivery conduit 4170 may not directly contact the reservoir base 6050. Instead, a conduit adapter may be provided to interconnect the air delivery conduit 4170 to the reservoir base 6050. The conduit adapter may include a base connector end for connection to the reservoir base 6050 and a tapered / ISO (standardized) end for connection to the air delivery conduit 4170. The conduit adapter may include a locking feature to prevent the air delivery conduit 4170 from being removed from the conduit adapter when the conduit adapter is connected to the base outlet 6090 of the reservoir base 6050.

[0701] Data collection

[0702] In one example, the air delivery conduit 4170 may include multiple wires spirally wound around the axis of the air delivery conduit 4170 (e.g., along the tube portion 4500 of the air delivery conduit 4170), for example, these wires being configured to heat the air in the air delivery conduit and / or transmit signals from one or more converters (e.g., temperature sensors, flow sensors) to the controller of the RPT device.

[0703] In one example, the air delivery conduit 4170 may include four wires, for example, two wires for powering one or more heating elements and two wires for connecting a temperature sensor / converter. However, it should be understood that other numbers of wires may be used, such as two, three, or five or more wires.

[0704] In one instance (for example, see...) Figure 23B and 24A The base connector 4600 of the air delivery tube 4170 includes a contact assembly 4650, which includes contacts 4655. In use, contacts 4655 engage with corresponding contacts disposed on the reservoir base 6050 to form an electrical connection with the reservoir base at the base outlet, thereby providing power and / or control signal transmission. In one example, the contacts 4655 of the base connector 4600 may be connected to corresponding wires extending along the air delivery tube 4170. In alternative examples, at least some of the contacts 4655 are not associated with the wires extending along the air delivery tube 4170, but are characterized by having their own independent and / or unique electrical characteristics (e.g., resistance, conductance, etc.). These independent and / or unique electrical characteristics can be used to identify one or more elements of the tube / patient interface system, or characteristics of these elements.

[0705] In one example, the base outlet 6090 of the memory base 6050 includes a contact assembly 6800, such as a PCBA 7600, for communicating with the power and electrical signals within the memory base. In one example, the contact assembly 6800 includes contacts 6805 corresponding to the number of contacts 4655 disposed on the base connector 4600 of the air delivery conduit 4170, for example… Figure 20B , 20C The four contacts shown are 20H to 20J. In one example, as... Figures 20H to 20J As shown, each contact 6805 includes a spring-loaded pin (e.g., a spring-loaded needle). In use, the spring-loaded pin 6805 will resiliently deflect during engagement with the base connector 4600 to maintain contact with the corresponding contact 4655 of the base connector 4600. In the illustrated example (e.g., see...), Figure 20JThe contact assembly 6800 also includes a contact 6810 (e.g., a spring-loaded pin) arranged to engage the PCBA 7600. The contacts 6805 and 6810 are supported by a support member 6815 configured to orient the contact 6805 substantially perpendicular to the contact 6810.

[0706] Because each contact 4655 or combination of contacts in the contact assembly 4650 of the air delivery tube 4170 can have unique electrical characteristics, in one example, the contact assembly 4650 of the air delivery tube 4170 can be used as an identifier for various parameters of the air delivery tube 4170 and / or the patient interface. For example, the contact assembly 4650 can be configured to identify the type of the air delivery tube 4170 (e.g., non-heated tube, heated tube, tube with heat and moisture exchanger (HME), unknown tube), the size of the air delivery tube (e.g., 15 mm, 19 mm), the presence and type of HME, the type of patient interface connected to the tube, etc. The data generated by the identification can be transmitted and used by the controller, for example, to optimize the operation of the RPT device, humidifier, etc., to facilitate data collection, etc. For example, the controller can be configured to identify the unique identification features provided by the contact assembly 4650, so that the controller can identify the specific characteristics of the air delivery tube 4170 coupled to the reservoir base 6050, and thus the controller can automatically configure the RPT device and / or humidifier to optimize operation.

[0707] In one example, the base connector 4600 may include a tapered support protrusion 4630 (see, for example, see...). Figure 20A , 20M (and 20N). When the base connector 4600 of the air delivery pipe 4170 is connected to the base outlet 6090 of the reservoir base 6050, the tapered support protrusion 4630 is adapted to be arranged adjacent to or in contact with one or more tapered support protrusions 6850 disposed at the base outlet 6090, such as Figure 20M and 20N As best shown. The tapered support protrusions 4630, 6850 provide an interface between the base connector 4600 and the base outlet 6090 to hold the base connector 4600 substantially perpendicular to the front surface of the base outlet 6090. For example, the interface prevents the base connector 4600 from drooping or tilting downwards from the base outlet 6090. For example, the interface between the base connector 4600 and the base outlet 6090 can counteract the force applied to the base connector 4600 by the contact assembly 6800, which tends to force the base connector 4600 downwards. For example, the force applied by the spring-loaded pin of the contact assembly 6800 deviates from the axis of the base connector 4600, which can force the base connector 4600 away from the base outlet 6090 at a downward angle.

[0708] Bayonet connection and intermediate components

[0709] Figures 43 to 78 An alternative example of connecting the air delivery pipe 4170 to the reservoir base 6050 and the water reservoir 6100 is shown. In this example, an intermediate component 6700 is removably coupled to the reservoir base 6050. The intermediate component 6700 is configured to pneumatically connect the water reservoir 6100 to the air delivery pipe 4170, such that a flow of pressurized air, already humidified in the water reservoir 6100, can be delivered from the water reservoir 6100 through the intermediate component 6700 to the air delivery pipe 4170. Furthermore, in this example, the base connector 4600 of the air delivery pipe 4170 is constructed and arranged to form a bayonet connection with the reservoir base 6050, which mechanically and / or electrically connects the air delivery pipe 4170 to the reservoir base 6050. In other words, the bayonet connection positions and secures the air delivery pipe 4170 to the reservoir base 6050 and / or provides power, information, and control signals to the heating element and converter associated with the air delivery pipe 4170.

[0710] intermediate components

[0711] like Figure 43 , 46 As shown in 49, 57, and 58, an intermediate component 6700 is disposed at the base outlet 6090 of the reservoir base 6050 to pneumatically connect the water reservoir 6100 to the air delivery line 4170. In the illustrated example, the intermediate component 6700 is removably coupled to the reservoir base 6050, allowing the intermediate component 6700 to be disassembled for cleaning, disinfection, and / or replacement, for example, in multi-patient multi-purpose (MPMU) applications.

[0712] like Figures 53 to 56 As shown, the intermediate component 6700 includes a tubular portion 6705, which includes an inlet end 6710 adapted to mate with a water reservoir 6100 and an outlet end 6720 adapted to mate with an air delivery pipe 4170. The intermediate component 6700 also includes retaining and aligning features configured and arranged to align the intermediate component 6700 with the reservoir base 6050 and provide a detachable, non-rotatable connection to the reservoir base 6050. Furthermore, the intermediate component 6700 includes a port 6730, such as a pressure port for inserting a sensor for measuring air pressure at the base outlet 6090. The port 6730 includes a port seal 6735 to provide a sealed interface between the sensor (e.g., a pressure sensor) and the intermediate component 6700.

[0713] In the examples shown, see, for example, [see...] Figure 56The tubular portion 6705 (including inlet end 6710 and outlet end 6720), along with retaining and aligning features, includes a first portion or matrix molded part made of a relatively rigid material (e.g., thermoplastic polymers (e.g., PC, ABS)), and the port seal 6735 includes a second portion or overmolded part made of a relatively soft material (e.g., thermoplastic elastomer (TPE) or silicone), which is provided (e.g., by overmolding) to the first portion. Therefore, the intermediate part 6700 provides a substantially rigid construction, for example, to achieve durability for MPMU applications.

[0714] In the example shown, the inlet end 6710 is arranged at an angle to the outlet end 6720; for example, the axis of the inlet end is arranged at approximately 90° relative to the axis of the outlet end. However, it should be understood that other suitable angles are possible, for example, the axis of the inlet end is arranged at approximately 45° relative to the axis of the outlet end.

[0715] The free end of the inlet end 6710 includes a flange or lip 6712 surrounding the pipe opening. The flange or lip 6712 provides a contact surface 6715. When the water reservoir 6100 is coupled to the reservoir base 6050, the outlet seal 6132 of the outlet pipe 6130 (or outlet) of the water reservoir 6100 is configured to engage with the contact surface 6715 of the inlet end 6710 and provide a face seal. In an alternative embodiment, the seal between the outlet pipe 6130 (or outlet) of the water reservoir 6100 and the contact surface 6715 of the inlet end 6710 may be an integral part of the inlet end 6710, or it may be a seal portion separate from the outlet pipe 6130 or the inlet end 6710. In the example shown, the contact surface 6715 includes a tapered shape entering the pipe opening, for example, to enhance the seal and prevent leakage.

[0716] The outlet end 6720 may include an ISO tapered section, such as an ISO tapered section with an outer diameter of 22 mm, for connection to the air delivery duct 4170.

[0717] Regarding the retention and alignment features, the intermediate component 6700 includes a pair of spring-loaded clamping arms 6740, i.e., cantilevered spring arms. Each spring or clamping arm 6740 may include a barbed end or tab 6745 configured to provide a snap-fit ​​engagement with a corresponding locking member (e.g., a protrusion 6750) disposed within a cavity in the reservoir base 6050, such as... Figure 46 As shown. The intermediate component 6700 also includes a guide rail 6760, which is configured and arranged to assist the intermediate component 6700 in proper alignment and insertion into the reservoir base 6050 by engaging with a corresponding guide slot 6755 extending into the cavity of the reservoir base 6050, as shown. Figure 46 ,50 As shown in Figure 52. Furthermore, the intermediate component 6700 includes a flange 6770, which is arranged between the inlet end 6710 and the outlet end 6720 to aid in positioning or placing the intermediate component 6700 within the reservoir base 6050 by means of a flange or wall adjacent to it. For example, the flange acts as a stop during insertion, such as... Figure 72 As shown. The flange 6770 of the intermediate component 6700 may include one or more cutouts or recesses 6772, for example, to receive fasteners or protrusions disposed along the flange or wall of the reservoir base 6050, such as... Figure 57 and 58 As shown.

[0718] When the intermediate component 6700 is inserted into the base opening 6091 of the reservoir base 6050, the intermediate component 6700 is oriented such that its guide rail 6760 engages with the guide slot 6755, which correctly aligns and guides the intermediate component 6700 to the operating position. Furthermore, the base opening 6091 and / or the opening 6919 provided at the base opening 6091 by the locking and contact assembly 6900 include a non-circular profile to facilitate proper orientation of the intermediate component 6700 during insertion, as... Figure 63 As shown. When the intermediate component 6700 reaches the operating position, the barbed end or tab 6745 of the spring or clamping arm 6740 is configured and arranged to engage above and / or behind the corresponding protrusion 6750, for example, see Figure 46 Each barb end 6745 and / or each protrusion 6750 may include a tapered shape to facilitate engagement into an operating position. In one example, engagement of the spring or clamping arm 6740 with the protrusion 6750 may provide sensory feedback, such as an audible click, to indicate correct engagement. This snap-fit ​​connection secures the intermediate component 6700 to the reservoir base 6050 in a releasable manner. To disengage the intermediate component 6700, the spring or clamping arm 6740 may be manually pressed down toward each other (e.g., with or without a tool) to resiliently flex the spring or clamping arm 6740 and its barb end 6745 against biasing to an unlocked position, i.e., to move the barb end 6745 away from engagement with the protrusion 6750, allowing the intermediate component 6700 to be removed from the reservoir base 6050.

[0719] Once the connection is established, the retaining and alignment features provided by the intermediate component 6700 / reservoir base 6050 provide a removable, non-rotatable connection between the intermediate component 6700 and the base outlet 6090 of the reservoir base 6050. Similarly, once connected, the spring or clamping arm 6740 of the intermediate component 6700 is locked into the cavity of the reservoir base 6050, for example, to prevent the intermediate component 6700 from being removed when the water reservoir 6100 is received in the reservoir base 6050.

[0720] When the intermediate component 6700 is connected to the base outlet 6090 of the reservoir base 6050, its inlet end 6710 and contact surface 6715 protrude into the cavity of the reservoir base 6050 to allow engagement with the outlet seal 6132 of the outlet pipe 6130 (or outlet) of the water reservoir 6100, see, for example, [reference needed]. Figure 46 Similarly, the outlet end 6720 of the intermediate component 6700 extends within the cavity of the reservoir base 6050 and / or protrudes to the outside to allow engagement with the air delivery pipe 4170, see, for example, [reference needed]. Figure 43 Furthermore, port 6730 of intermediate component 6700 is oriented as follows: Figure 57 As shown, it faces upwards to dock with the sensors associated with the PCBA.

[0721] Bayonet locking and contact components

[0722] like Figures 43 to 52 As shown, a locking and contact assembly 6900 is disposed at a base outlet 6090 of the reservoir base 6050 to mechanically and electrically connect the reservoir base 6050 to the air delivery conduit 4170. In the illustrated example, the locking and contact assembly 6900 includes a bayonet connection configured and arranged to position and secure the air delivery conduit 4170 to the reservoir base 6050 and form a mechanical, pneumatic, and electrical (both electrical and control signal) connection.

[0723] like Figures 59 to 62 As shown, the locking and contact assembly 6900 includes a base 6910, an (electrical) contact assembly 6950 disposed on the base, and a cover 6970 disposed on the base 6910 to close at least a portion of the contact assembly 6950.

[0724] The base 6910 includes a rear wall 6912, which is secured, for example, to one or more walls surrounding the base opening 6091 by one or more fasteners, to secure the base 6910 to the base outlet 6090 of the reservoir base 6050. Figure 63As shown, the rear wall 6912 includes an opening 6915 (e.g., non-circular) that aligns with the base opening 6091 to allow insertion and connection of the intermediate component 6700 as described above. For example, the non-circular opening 6915 is adapted to receive the non-circular profile of the intermediate component 6700. Furthermore, as described above, the rear wall 6912 provides a stop for the intermediate component 6700 during assembly; for example, at least a portion of the flange 6770 of the intermediate component 6700 may abut the rear wall 6912. Figure 72 As shown.

[0725] The base 6910 includes an annular sidewall 6920 projecting outward from the rear wall 6912. When the intermediate member 6700 is attached to the reservoir base 6050, the outlet end 6720 of the intermediate member 6700 and the annular sidewall 6920 cooperate to form a channel 6780 for receiving the air delivery pipe 4170. A retaining wall 6930 projects radially outward from the annular sidewall 6920 along a portion of the periphery of the annular sidewall, for example, along a portion of the upper side of the annular sidewall. (Reference) Figure 57 A gap is formed in the annular sidewall 6920 along a portion of its periphery, forming a recess 6940 leading to the channel 6780. The recess 6940 is adjacent to and arranged counterclockwise from the retaining wall 6930. As described below, the recess 6940 and the retaining wall 6930 are constructed and arranged such that a portion of the base connector 4600 of the air delivery pipe 4170 can be inserted into the recess 6940 and then rotated clockwise to move behind the retaining wall 6930, thereby achieving a locking engagement between the air delivery pipe and the base.

[0726] Additional retaining and aligning features (e.g., recesses and / or grooves) are provided along the periphery of the annular sidewall 6920. These retaining and aligning features are configured and arranged to interact with corresponding features on the base connector 4600 of the air delivery pipe 4170 during engagement, as discussed below.

[0727] like Figures 60 to 62 As shown, the electrical contact assembly 6950 is supported by a base 6910 adjacent to the retaining wall 6930. The contact assembly 6950 communicates with power and electrical signals within a reservoir base 6050 (e.g., PCBA 7600). As shown, the contact assembly 6950 includes a support member 6952 and a plurality of contacts 6955, such as four contacts, supported by the support member 6952. Each contact 6955 includes a spring arm 6956 (in...). Figure 61(Most clearly visible in the image), the spring arm 6956 is biased away from the support member 6952. In use, when the tube engages with the base, the spring arm 6956 will resiliently deflect during engagement with the base connector 4600 to maintain contact with the corresponding contact of the base connector 4600. The contact assembly 6950 also includes an electrical connector 6958, such as a flexible circuit board (FCB), flexible printed circuit (FPC), and / or flexible flat cable (FFC), to electrically connect the contact 6955 to the PCBA 7600 (see [link to PCBA 7600]). Figure 62 ).

[0728] The upper side of the base 6910 includes a contact support structure 6960. Figure 62 The contact support structure 6960 is constructed and arranged to support and retain the contact assembly 6950. Figure 61 The support member 6952 supports the contact 6955 of the contact assembly 6950 in a radially outward direction on the annular sidewall 6920 and an axially inward direction on the retaining wall 6930. The cover portion 6970 is fixed to the upper side of the base 6910 to at least surround the support member 6952 and the contact 6955 (see...). Figure 60 Electrical connector 6958 protrudes from base 6910, for example, through one or more slots in the base, to connect to PCBA 7600. Figure 62 ).

[0729] Base connector

[0730] like Figures 43 to 45 As shown, the base connector 4600 of the air delivery pipe 4170 is configured to form a pneumatic connection with the intermediate component 6700 and a mechanical and electrical connection with the locking and contact assembly 6900 provided on the reservoir base 6050.

[0731] In the example shown, the base connector 4600 includes a tubular base portion 4640 and a locking and contact assembly 4660 disposed on the base portion 4640.

[0732] like Figures 64 to 68As shown, the tubular base portion 4640 includes a radial lip seal 4645 extending into an opening in the base portion 4640. The radial lip seal 4645, when in its relaxed, undeformed shape, provides an inner diameter smaller than the outer diameter of the outlet end 6720 of the intermediate component 6700, with the base connector pneumatically engaging the intermediate component 6700. For example, the inner diameter provided by the radial lip seal 4645 may be less than about 22 mm (e.g., about 19 to 21 mm or less) for use with an ISO tapered outlet end 6720 including a 22 mm outer diameter. In use, the radial lip seal 4645 is configured to resiliently deform upon engagement with the outlet end 6720 of the intermediate component 6700 to provide a pneumatic connection with the intermediate component 6700; for example, the radial lip seal 4645 forms an airtight seal against the outer surface of the outlet end 6720 of the intermediate component 6700. As shown in the figure, the radial lip seal 4645 extends at an angle toward the interior of the base portion 4640 to provide guidance for aligning and engaging the base connector 4600 with the intermediate member 6700. Furthermore, the stop surface 4647 within the base portion 4640 (see...) Figure 66 It provides a stop to prevent the intermediate part 6700 from being further inserted into the base connector 4600.

[0733] The base portion 4640 includes a tapered protrusion 4642 that projects outward from the base portion 4640 adjacent to the locking and contact assembly 4660 (see also...). Figure 64 The tapered protrusion 4642 provides a thumb and / or finger grip to facilitate manual operation and connection of the base connector 4600 with the intermediate part 6700 and the locking and contact assembly 6900 disposed on the reservoir base 6050.

[0734] Furthermore, the base portion 4640 includes a spring-loaded retaining protrusion 4644 along its opposite side. As described below, the retaining protrusion 4644 is configured and arranged to interact during engagement with retaining and alignment features (e.g., recesses and / or grooves) on the base 6910 of the locking and contact assembly 6900 disposed on the reservoir base 6050.

[0735] In the example shown, such as Figure 68As shown, the base portion 4640 may include a base 4640bs (e.g., comprising one or more portions) made of a relatively rigid material (e.g., thermoplastic polymers such as polypropylene (PP), polycarbonate (PC), and acrylonitrile butadiene styrene (ABS)) and an overmolded member 4640ov made of a relatively soft material (e.g., thermoplastic elastomer (TPE) or silicone), the overmolded member 4640ov being provided (e.g., by overmolding) to the base 4640bs. As shown, the relatively rigid base 4640bs may be formed into a tubular base portion 4640 structural shape including a tapered protrusion 4642 and a spring-retaining protrusion 4644, while the relatively soft overmolded member 4640ov, together with a radial lip seal 4645, forms the exterior of the tubular base portion 4640.

[0736] like Figure 64 As shown, the locking and contact assembly 4660 includes a retaining portion 4665, a support arm 4662 supporting the retaining portion 4665 in a relationship spaced apart from the base portion 4640, and a contact assembly 4666 disposed on the retaining portion 4665. As described below, the retaining portion 4665 is configured and arranged to rotate behind a retaining wall 6930, which is disposed on the locking and contact assembly 6900 on the reservoir base 6050 to axially lock the base connector 4600 in a locked position. The contact assembly 4666 includes a contact 4667, which is arranged in use to engage with a corresponding contact 6955 disposed on the locking and contact assembly 6900 on the reservoir base 6050 to form an electrical and control signal connection with the reservoir base 6050. When the base connector 4600 is rotated to the locked position, the contact 4667 is arranged along the retaining portion 4665 to form an electrical and signal connection. Electrical connector 4668 (e.g., flexible circuit board (FCB), flexible printed circuit (FPC), and / or flexible flat cable (FFC)) electrically connects contact 4667 to a corresponding wire extending along air delivery conduit 4170 and / or circuit element. For example... Figure 64 As shown, the contact tracks extend in a circumferential direction, which allows them to initiate and maintain electrical connection as the base connector 4600 rotates within the locking and contact assembly 6900.

[0737] The base connector and the storage base are joined together.

[0738] Figures 43 to 45 Figures 69 to 78 show the engagement of the base connector 4600 of the air delivery pipe 4170 with the reservoir base 6050. Figure 43As shown, the base connector 4600 is oriented such that its locking and contact assembly 4660 aligns with the recess 6940 provided by the locking and contact assembly 6900 on the reservoir base 6050. The base connector 4600 is then pushed toward the reservoir base 6050 such that the outlet end 6720 of the intermediate member 6700 extends into the opening of the base portion 4640, and the radial lip seal 4645 engages against the outer surface of the outlet end 6720 and resiliently deforms. As the base connector 4600 is further pushed toward the reservoir base 6050 into the unlocked engaged position, the radial lip seal 4645 of the base connector 4600 engages with and slides along the outer surface of the outlet end 6720 of the intermediate member 6700.

[0739] like Figure 44 and 69 As shown in Figure 72, when the base connector 4600 reaches the unlocked engagement position, the base portion 4640 of the base connector 4600 is received within the channel 6780 formed by the base 6910 and the intermediate member 6700, and the locking and contact assembly 4660 of the base connector 4600 is received within the recess 6940. In one example, the front end of the base portion 4640 may engage the flange 6770 of the intermediate member 6700, and / or the stop surface 4647 within the base portion 4640 may engage the free end of the outlet end 6720 to prevent the base connector 4600 from being further inserted into the locking and contact assembly 6900.

[0740] Furthermore, when the base connector 4600 reaches the unlocked engagement position, the retaining protrusions 4644 of the base connector 4600 are oriented to engage within corresponding recesses of the annular sidewall 6920 provided in the base 6910. For example, one of the protrusions 4644 engages within a closed elongated recess 6922, while the other of the protrusions 4644 engages within an end-open recess 6924. The frictional force holding the protrusions within the engagement grooves can be calibrated sufficiently to retain the tube in this engaged but unlocked configuration when the device is under operating pressure. Therefore, in this configuration, a fully operable pneumatic engagement can exist between the tube and the base. However, a mechanical engagement is not achieved. Moreover, in this configuration, the tube and the base are not electrically connected.

[0741] like Figure 45 and 73As shown in Figure 78, the base connector 4600 rotates clockwise from its unlocked engagement position to a locked position, locking the base connector 4600 to the memory base 6050 and establishing an electrical and control signal connection with the memory base 6050. When the base connector 4600 reaches the locked position, the retaining portion 4665 rotates above and behind the retaining wall 6930 of the locking and contact assembly 6900, provided by the annular sidewall 6920, preventing the base connector 4600 from being pulled axially outward from the memory base 6050. Furthermore, the contact 4667 along the retaining portion 4665 is rotated to engage with the corresponding spring arm 6956 of the contact 6955 provided in the locking and contact assembly 6900, forming an electrical and control signal connection with the memory base 6050.

[0742] Furthermore, when the base connector 4600 reaches the locked position, one protrusion 4644 rotates within the closed elongated recess 6922, while another protrusion 4644 rotates out of the end-opening recess 6924 and into the adjacent end-opening recess 6926. This engagement of the protrusions 4644 within the respective recesses provides holding force, provides alignment features, and provides tactile feedback during engagement. Additionally, the locking and contact assembly 6900 may include a stop wall 6935 (see...). Figure 70 The stop wall 6935 is arranged to engage the locking and contact assembly 4660 of the base connector 4600 when the base connector 4600 reaches the locked position, to prevent further rotation of the base connector 4600, see, for example, [reference needed]. Figure 74 .

[0743] In this example, the connection between the base connector 4600 and the reservoir base 6050 is configured such that the pneumatic connection is completed prior to the electrical and mechanical connections. In another example, the electrical, pneumatic, and mechanical connections can be formed simultaneously when the base connector is rotated to the locked position or by removing the rotation function from the connection.

[0744] To allow removal of the air delivery conduit 4170 from the reservoir base 6050, the base connector 4600 can be rotated counterclockwise from a locked position to an unlocked engaged position. This rotates the locking and contact assembly 4660 of the base connector 4600 into a recess 6940 provided by the locking and contact assembly 6900. This rotation electrically disengages the base connector 4600 from the reservoir base 6050 and allows the base connector 4600 to be pulled outward from the reservoir base 6050 to disengage.

[0745] Plug-in connection and intermediate components

[0746] Figures 110 to 133An alternative example of the engagement between the base connector 4600 of the air delivery pipe 4170 and the humidification tank 6100 is shown. This arrangement includes different configurations for connecting the air delivery pipe 4170 to the intermediate component 9700 of the reservoir base 6050 and the water reservoir 6100, such as... Figures 116 to 120 As best shown in the diagram. In this example, the intermediate component 9700 is removably connected to the reservoir base 6050 and configured to pneumatically connect the water reservoir 6100 to the air delivery pipe 4170, thereby allowing pressurized airflow, already humidified in the water reservoir 6100, to be delivered from the water reservoir 6100 to the air delivery pipe 4170 via the intermediate component 9700. Furthermore, in this example, the intermediate component 9700 is also configured to be releasably mechanically / locked to the air delivery pipe 4170, which positions and releasably holds the air delivery pipe 4170 to the reservoir base 6050. Moreover, this arrangement allows the air delivery pipe 4170 to also form an electrical connection with the reservoir base 6050 when it is mechanically locked and pneumatically engaged with the intermediate component 9700. This electrical connection provides electrical power, information, and control signals to the heating element and converter associated with the air delivery pipe 4170. Each pair of the following connections—locking mechanical engagement, pneumatic engagement, and electrical engagement—can be performed sequentially or substantially simultaneously. If these engagements are performed sequentially, the specific order in which they are performed can be varied. In one example, during the connection of the air supply pipe to the intermediate component, the pneumatic engagement is performed first, followed by the mechanical / locking engagement and the electrical engagement substantially simultaneously. In another example, when connecting the air supply pipe to the intermediate component, the locking mechanical engagement, pneumatic engagement, and electrical engagement can be performed substantially simultaneously.

[0747] In the above about Figures 43 to 78 In the described example, the base connector 4600 is pneumatically sealed to the intermediate component 6700 and mechanically connected (locked) to the reservoir base 6050. Figures 110 to 133 The latter example shown is the opposite; the base connector 4600 of the air delivery pipe 4170 is... Figures 110 to 133 In this example, the intermediate component 9700 forms both a pneumatic seal and a mechanical (locking) connection. By combining the pneumatic and mechanical connections into a single component, dimensional tolerances can be improved, making the base connector 4600 more reliable and easier to manufacture, and also allowing for a reduction in the size of the base connector 4600.

[0748] intermediate components

[0749] like Figure 110 , 112As shown in 113 and 115A, an intermediate component 9700 is disposed at and mechanically engaged with the base outlet 6090 of the reservoir base 6050 to pneumatically connect the reservoir 6100 to the air delivery pipe 4170 and mechanically connect the air delivery pipe 4170 to the reservoir base 6050. In the illustrated example, the intermediate component 9700 is removably coupled to the reservoir base 6050, allowing the intermediate component 9700 to be disassembled for cleaning, disinfection, and / or replacement, for example, in multi-patient multi-purpose (MPMU) applications.

[0750] like Figure 113 and 116 As shown in Figure 120, the intermediate component 9700 includes a tubular portion 9705, which includes an inlet end 9710 and an outlet end 9720. Figure 120 The inlet end 9710, best shown in the diagram, is provided with an inlet seal 9715 adapted to mate with a water reservoir 6100, and the outlet end 9720 is adapted to mate with an air delivery pipe 4170. The tubular portion 9705 also includes retaining and aligning features configured and arranged to align the intermediate part 9700 with the reservoir base 6050 and provide a detachable, non-rotatable connection to the reservoir base 6050. Furthermore, the tubular portion 9705 includes a port 9730 (in... Figure 120 (best shown in the diagram), for example, for communication with a sensor (e.g., a pressure sensor) and / or a microphone. In the example shown, port 9730 is provided with a port seal and / or diaphragm 9735 to allow for communication between port 9730 and chassis opening 7380 associated with the sensor and / or microphone (see [reference]). Figure 115C3 A sealed interface and / or cover are provided between the two. In an alternative instance, port 9730 may not include a port seal or membrane. Furthermore, intermediate component 9700 includes a retaining feature configured and arranged to provide a removable connection to base connector 4600 of air delivery conduit 4170.

[0751] In the examples shown (for example, see...) Figure 120 The tubular portion 9705 (including an inlet end 9710, an outlet end 9720, and retaining and aligning features) includes a first portion or matrix molded part made of a relatively rigid material (e.g., a thermoplastic polymer (e.g., PC, ABS)), and the inlet seal 9715 and the port seal 9735 include a second portion or overmolded part made of a relatively soft material (e.g., a thermoplastic elastomer (TPE) or silicone), which is provided (e.g., by overmolding) to the first portion. Figure 120The separation of the soft components of the intermediate component 9700 from the remaining hard material components is for illustrative purposes only. In reality, the soft material components can be permanently connected to the corresponding rigid components, and Figure 119 Its construction can be a single intermediate component 9700, which cannot be disassembled into... Figure 120 The single component shown.

[0752] In the example shown, the inlet end 9710 and the inlet seal 9715 are arranged at an angle to the outlet end 9720; for example, the axis of the opening at the inlet seal 9715 is arranged at approximately 90° relative to the axis of the opening at the outlet end 9720 (see [reference]). Figure 119 However, it should be understood that other suitable angles are possible, for example, the axis of the inlet seal 9715 is arranged at approximately 45° relative to the axis of the outlet end 9720.

[0753] When the water reservoir 6100 is attached to the reservoir base 6050, the inlet seal 9715 of the intermediate component 9700 is configured and arranged to engage the contact surface along the outlet end of the outlet pipe 6130 (or outlet) of the water reservoir 6100 and provide a face seal against the contact surface (see [link]). Figure 131 and 132 This joint seals the outlet flow path, which allows humidified air to flow out of the water reservoir 6100 and into the intermediate component 9700 for delivery to the air delivery pipe 4170. As shown, the inlet seal 9715 may include a bellows arrangement that is elastically compressible to provide a degree of decoupling between the intermediate component 9700 and the water reservoir 6100.

[0754] In an alternative embodiment, the soft material and / or flexible material seal between the outlet pipe 6130 (or outlet) of the water reservoir 6100 and the intermediate component 9700 may be an integral part of the outlet pipe 6130, or it may be a seal portion independent of the outlet pipe 6130 or the intermediate component 9700.

[0755] Export end 9720 (for example, see Figure 115C3 It may include an ISO tapered shape, such as an ISO tapered shape with an outer diameter of 22 mm, for connection to the air delivery duct 4170.

[0756] Regarding the holding and alignment features for aligning and holding the intermediate component 9700 to the reservoir base 6050, the intermediate component 9700 includes a spring-loaded clamping arm 9740 (see, for example, see...). Figures 116 to 118This refers to a cantilevered spring arm. The spring or clamping arm 9740 may include a barbed end or tab 9745 configured to provide a snap-fit ​​connection with a locking member (e.g., a crossbar 9750) disposed within a cavity in the reservoir base 6050 (see [link]). Figure 112 and 114 The intermediate component 9700 may also include a guide rail 9760 (along the lower side of the intermediate component 9700) and a guide rib 9761 (along the upper front side of the intermediate component 9700), the guide rib 9761 being configured and arranged to pass through a corresponding guide slot 9755 extending into the cavity of the reservoir base 6050 (see, for example, see...). Figure 114 , 115B 116, 117) are engaged to help the intermediate part 9700 be properly aligned and inserted into the storage base 6050.

[0757] In addition, intermediate component 9700 includes flange 9770 (see, for example, see...) Figure 116 A flange 9770 is arranged between the inlet end 9710 and the outlet end 9720 to aid in the positioning and / or placement of the intermediate component 9700, and more specifically, to limit the insertion depth of the intermediate component 9700 in the reservoir base 6050. The flange 9770 is implemented by abutting a wall disposed on the reservoir base 6050; for example, the flange acts as a stop during insertion, such as... Figure 115C3 and 115E As shown. Figure 115D , 115E As shown in 120, one or more buffers 9775 (e.g., made of thermoplastic elastomer (TPE) or silicone) can be provided to soften the abutment of the flange 9770 against the base wall during insertion and absorb vibrations during use. In addition to minimizing vibrations of the intermediate member 9700, the flexible nature of the buffers ensures that once they are depressed, a spring force is generated that pushes the barbed tabs 9745 backward and ensures that the tabs are in a constant locking engagement with the crossbar 9750. This minimizes vibrations in the locking engagement between the barbed tabs 9745 and the crossbar 9750, as well as the possibility of disengagement. In the example shown, the first buffer 9775 is disposed on the upper side of the intermediate member 9700, and the second buffer 9775 is disposed on the lower side of the intermediate member 9700 (see [reference]). Figure 115D and 115E In one example, buffer 9775 can be used with inlet seal 9715 and port seal 9735 (see [link]). Figure 120 ) Attach together to the base wall or overmolded into the tubular portion 9705.

[0758] Regarding the retaining features that hold the base connector 4600 of the air delivery pipe 4170 to the intermediate component 9700, the intermediate component 9700 includes a portion of annular sidewall 9790 projecting outward from the flange 9770 along the outlet end 9720 (see...). Figure 120 ).like Figure 120 As shown, the outlet end 9720 and the partial annular sidewall 9790 mate to form an annular channel 9780 for receiving the air delivery pipe 4170. Each of the opposing inner sides of the partial annular sidewall 9790 includes a hole or recess 9792 adapted to receive a corresponding retaining protrusion 4644 of the base connector 4600 disposed on the air delivery pipe 4170 during engagement (see...). Figure 123 In the example shown, in the partial annular sidewall 9790 (along its upper side, see...), Figure 120 A gap is provided in the air delivery pipe 4170 to accommodate and facilitate the electrical connection of the base connector 4600.

[0759] In addition, the intermediate component 9700 includes a lower tab 9795 (e.g. Figure 120 The lower tab 9795 protrudes outward and downward from a portion of the periphery of the partial annular sidewall 9790 (along its lower side). The lower tab 9795 can function as a finger or push tab to facilitate insertion / retraction of the intermediate component 9700 into / from the reservoir base 6050. Furthermore, the lower tab 9795 can be configured and arranged to cover or conceal one or more fasteners 9799 (e.g., screws or edges) between the integrated RPT device and the outer cover of the humidifier 6000 and the chassis component (see [link to relevant documentation]). Figure 110 and 113 ).

[0760] When the intermediate component 9700 is inserted into the base opening 6091 of the reservoir base 6050, the intermediate component 9700 is oriented such that its guide rails 9760 and guide ribs 9761 engage with the corresponding guide slots 9755. This correctly aligns and guides the intermediate component 9700 to the operating position (see, for example, see...). Figure 113 Furthermore, the base opening 6091 and the partial annular sidewall 9790 of the intermediate component 9700 include a non-circular profile to facilitate the proper orientation of the intermediate component 9700 during insertion.

[0761] The dimensions and interactions between the intermediate component 9700 and the reservoir base 6050 can also be arranged such that the base opening 6091 of the reservoir base 6050 (which receives the intermediate component 9700) can have a cross-section slightly larger than that of the intermediate component 9700 (see, for example, see...). Figure 115C1 However, closer to the end of the insertion path (e.g., see...) Figure 115C2One or more buffers, such as buffer 9751 and / or buffer 9752, may be present, providing a lift or buffer point that raises the inner edge or surface 9758 of the intermediate element 9700 (e.g., along the clamping arm 9740 and guide rail 9760), such that the entire front end of the intermediate element 9700 is lifted. Therefore, the port seal 9735 can be moved or prepared to seal against the chassis opening 7380. Further insertion of the intermediate element then causes a portion of the intermediate element to form an abutment engagement with a corresponding portion of the chassis opening, thereby preventing further insertion. At this point, the port seal 9735 of the port 9730 is moved to seal against the chassis opening 7380 (e.g., see...). Figure 115C3 A sealing joint, or an arrangement to maintain that sealing joint, if such a joint has already been formed. Figure 115C1-115C3 As shown, tab 9795 may include ribs or buffers 9753, which provide additional raised or cushioned points arranged to abut the base. This arrangement minimizes friction during insertion of the intermediate element into the base opening 6091, while still ensuring a sealed engagement between the port seal 9735 and the chassis opening 7380 in the engaged configuration. Since significant forces may be applied to the intermediate element 9700 during use, more than one cushioning point (e.g., raised points at buffers 9751 and 9753, or raised points at buffers 9751, 9752, and 9753) can be used to increase stability. Including such multiple supports / raised points helps ensure a strong and consistent seal at 9730, even if the patient may pull on the tube during treatment. Additionally, the robust support of the intermediate element makes it easier to connect and remove the connecting tube from the intermediate element.

[0762] When the intermediate component 9700 reaches the operating position, the barb end or tab 9745 of the spring or clamping arm 9740 is configured and arranged to engage below and behind the crossbar 9750, for example, see Figure 112 The barb end 9745 and / or the crossbar 9750 may include a tapered shape to facilitate engagement with an operating position. In one example, the engagement of the spring or clamping arm 9740 with the crossbar 9750 may provide sensory feedback, such as an audible click, to indicate correct engagement. This snap-fit ​​connection secures the intermediate part 9700 to the reservoir base 6050 in a releasable manner. To disengage the intermediate part 9700, the spring or clamping arm 9740 may be manually pressed against the rear of the reservoir base 6050 (e.g., with or without a tool). This pressure resiliently deflects the spring or clamping arm 9740 and the barb end 9745 to an unlocked position, i.e., where the barb end 9745 moves out of engagement with the crossbar 9750, allowing the intermediate part 9700 to be removed from the reservoir base 6050.

[0763] Once the intermediate component 9700 is inserted and locked into the base opening 6091 of the reservoir base 605, the retaining and alignment features provided by the engagement between the intermediate component 9700 and the reservoir base 6050 provide a removable, non-rotatable connection between the intermediate component 9700 and the base outlet 6090 of the reservoir base 6050. Similarly, once connected, the spring or clamping arm 9740 of the intermediate component 9700 is locked into the cavity of the reservoir base 6050, for example, to prevent the intermediate component 9700 from being removed when the water reservoir 6100 is received in the reservoir base 6050.

[0764] When the intermediate component 9700 is connected to the base outlet 6090 of the reservoir base 6050, its inlet seal 9715 extends into the cavity of the reservoir base 6050 to allow engagement with the outlet pipe 6130 (or outlet) of the water reservoir 6100 (see [link]). Figure 112 and Figure 131 Similarly, the outlet end 9720, together with its partial annular sidewall 9790 and the hole 9792, extends within and / or beyond the cavity of the reservoir base 6050 to allow engagement with the air delivery pipe 4170, see, for example, [reference needed]. Figure 110 and 115A Furthermore, its port 9730 and port seal 9735 are oriented as follows: Figure 115C3 As shown, it faces upwards to mate with the chassis opening 7380 associated with the sensor and / or microphone.

[0765] Electrical connection

[0766] like Figure 110 , 115A As shown in 121 and 122, an electrical contact assembly 9950 is disposed at the base outlet 6090 of the storage base 6050 to electrically connect the storage base 6050 to the air supply pipe 4170 and form an electrical (both power and control signal) connection.

[0767] As in Figure 121 and 122 As best shown, the contact assembly 9950 is supported by the upper side of the base opening 6091 at the base outlet 6090 of the base 6050 of the memory base 6050. The contact assembly 9950 communicates with the power and electrical signals within the memory base 6050 (e.g., PCBA 7600). As shown, the contact assembly 9950 includes a support member 9952 and a plurality of contacts 9955, such as four contacts, supported by the support member 9952. Each contact 9955 may include a spring arm 9956 (in... Figure 122(Most clearly visible in the image), the spring arm 9956 is biased away from the support member 9952. In use, when the base connector 4600 of the air delivery pipe 4170 engages with the reservoir base 6050, the spring arm 9956 will resiliently deflect during engagement with the base connector 4600 to maintain contact with the corresponding contact 4667 of the base connector 4600. The contact assembly 9950 also includes an electrical connector 9958, such as a flexible circuit board (FCB), flexible printed circuit (FPC), and / or flexible flat cable (FFC), to electrically connect the contact 9955 to the PCBA 7600 (see [link to PCBA 7600]). Figure 122 ).

[0768] like Figure 110 and 115A As shown, the outer housing or outer cover 8050 (enclosing the chassis assembly 7300 and the storage base 6050) provides a cover or enclosure for the contact assembly 9950 and forms a socket or opening 9980 leading to the contact 9955 (female connector) for engagement with the corresponding contact of the base connector 4600 (male connector).

[0769] Base connector

[0770] like Figures 110 to 111 As shown, the base connector 4600 of the air delivery pipe 4170 is configured to form a pneumatic and mechanical connection with the intermediate component 9700 and an electrical connection with the contact component 9950 disposed on the reservoir base 6050.

[0771] In the illustrated example, the base connector 4600 includes a tubular base portion 4640 and a contact assembly 4661 disposed on the base portion 4640 (see [link]). Figure 110 ).

[0772] like Figures 123 to 126 As shown, the tubular base portion 4640 includes a radial lip seal 4645 extending into the inlet opening of the base portion 4640. The radial lip seal 4654, when in its relaxed, undeformed shape, provides an outlet end 9720 smaller than the intermediate portion 9700. Figure 115A The inner diameter of the outer diameter of the base connector is pneumatically engaged with the intermediate component 9700. For example, the inner diameter of the radial lip seal 4645 may be less than about 22 mm (e.g., about 19 to 21 mm or less) for use with the ISO tapered outlet end 9720, which includes an outer diameter of 22 mm. In use, the radial lip seal 4645 is configured to resiliently deform upon engagement with the outlet end 9720 of the intermediate component 9700 to provide a pneumatic connection with the intermediate component 9700; for example, the radial lip seal 4645 forms an airtight seal surrounding and abutting the outer surface of the outlet end 9720 of the intermediate component 9700. Figure 125As best shown, the radial lip seal 4645 extends at an angle toward the interior of the base portion 4640 to provide guidance for aligning and engaging the base connector 4600 with the intermediate member 9700. Furthermore, the stop surface 4647 within the base portion 4640 (see...) Figure 125 It provides a stop to prevent the intermediate part 9700 from being further inserted into the base connector 4600.

[0773] The tapered protrusion 4642 protrudes outward from the base portion 4640 adjacent to the contact assembly 4661 (see also...) Figure 123 The tapered protrusion 4642 provides a thumb and / or finger grip to facilitate manual operation and connection of the base connector 4600 with the intermediate part 9700 and the contact assembly 9950 disposed on the reservoir base 6050. Figure 111 As shown, the tapered protrusion 4642 may include an alignment mark configured and arranged to align with the alignment mark provided on the reservoir base 6050 when the air delivery pipe 4170 is connected to the reservoir base 6050, to ensure that the base connector 4600 of the air delivery pipe 4170 is correctly aligned and properly connected to the reservoir base 6050 during use.

[0774] In addition, such as Figure 123 As shown, the base portion 4640 includes a spring-retaining protrusion 4644 on each of the opposite sides of the base portion 4640. As described below, the retaining protrusion 4644 is configured and arranged to interact with a corresponding hole 9792 provided on the intermediate member 9700 during engagement, so as to retain the base connector 4600 in operative engagement with the intermediate member 9700, and thus in operative engagement with the entire RPT device 6000.

[0775] like Figure 123 As shown, the contact assembly 4661 (lead frame) includes a support portion 4665 and a plurality of contacts 4667, such as four contacts, included along the front side of the support portion 4665. As shown, the support portion 4665 includes a stepped structure to support the contacts 4667 in a relationship spaced apart from the base portion 4640. The contacts 4667 are arranged to engage with corresponding contacts 9955 of the contact assembly 9950 disposed on the reservoir base 6050 to form an electrical and control signal connection with the reservoir base 6050. In the illustrated example, the contacts 4667 are arranged as male connectors, and the contacts 9955 on the reservoir base 6050 are arranged as female connectors. The male connectors are configured to form an electrical and signal connection, i.e., a straight or direct insertion connection, when inserted and engaged with the female connectors. The support portion 4665 provides electrical connectors to electrically connect the contacts 4667 to corresponding wires extending along the air delivery conduit 4170 and / or circuit elements.

[0776] like Figure 123 As shown, the track of contacts 4667 is raised (spaced apart from the body of the sleeve) and extends in the axial direction, which allows them to be activated and maintain electrical connection when the base connector 4600 is inserted into the socket 9980 in which contacts 9955 are arranged. However, it should be understood that the support portion and / or contacts may have alternative constructions and arrangements, for example, depending on the interface arrangement or connection mechanism provided at the base outlet 6090 of the reservoir base 6050.

[0777] In the example shown, such as Figure 126 As shown, the base connector 4600 may include a base assembly 4680 (including a base 4682 and a cover 4684) that supports the contact assembly 4661 (lead frame). In one example, the contact assembly 4661 may first engage or interlock with the base 4682, and then the cover 4684 may clamp onto or otherwise engage with the base 4682 to securely support and hold the contact assembly 4661 in an operational position. The base assembly 4680 is made of a relatively rigid material (e.g., a thermoplastic polymer, such as PP, PC, or ABS), and an overmolded part 4690 made of a relatively soft material (e.g., a thermoplastic elastomer (TPE) or silicone) is provided to the base assembly 4680 (e.g., by overmolding). As shown in the figure, the relatively rigid base assembly 4680 can form a structural shape of a tubular base portion 4640, a tapered protrusion 4642, and a spring-retaining protrusion 4644, while the relatively soft overmolded part 4690 forms a soft exterior of the tubular base portion 4640 and the tapered protrusion 4642 and forms a radial lip seal 4645.

[0778] The base connector and the storage base are joined together.

[0779] Figures 110 to 111 Figures 127 to 130 show the engagement of the base connector 4600 of the air delivery pipe 4170 with the reservoir base 6050. Figure 110As shown, the base connector 4600 is oriented such that its contact assembly 4661 aligns with the socket 9980 of the contact assembly 9950 leading to the reservoir base 6050. The base connector 4600 is then axially pushed toward the reservoir base 6050 such that the outlet end 9720 of the intermediate member 9700 extends into the opening of the base portion 4640, and the radial lip seal 4645 engages with and resiliently deforms against the outer surface of the cylindrical outlet end 9720. When the radial lip seal 4645 of the base connector 4600 engages with and slides along the outer surface of the outlet end 9720 of the intermediate component 9700 as the base connector 4600 is further pushed toward the reservoir base 6050, it reaches the locked position, where the contact assembly 4661 extends into the socket 9980 to engage the contact 4667 with the corresponding spring arm 9956 of the contact 9955 and form an electrical and control signal connection with the reservoir base 6050 (see [link]). Figure 111 and 129 Up to 130).

[0780] Furthermore, when the base connector 4600 reaches the locked position, the base portion 4640 of the base connector 4600 is received within the channel 9780 formed by the intermediate member 9700, and the retaining protrusion 4644 is configured and arranged to engage within a corresponding hole 9792 provided in the partial annular sidewall 9790 of the intermediate member 9700, so as to releasably hold the base connector 4600 in the locked position under operating pressure (see...). Figures 127 to 128 This engagement, which keeps the protrusion 4644 within the corresponding hole 9792, can provide tactile feedback during engagement. In the locked position, the base connector 4600 is pneumatically and mechanically engaged with the intermediate part 9700 and electrically connected to the electrical contacts of the reservoir base 6050.

[0781] In addition, such as Figure 123 , 125 As shown in Figures 126 and 126, the base connector 4600 may include one or more internal ribs 4648 configured to engage along the outer surface of the outlet end 9720 of the intermediate member 9700 to help position and align the base connector 4600 relative to the intermediate member 9700.

[0782] In one example, the front end of the base portion 4640 may engage the flange 9770 of the intermediate component 9700, and / or the stop surface 9647 within the base portion 4640 may engage the free end of the outlet end 9720 of the intermediate component 9700. This abutment prevention base connector 4600 is further inserted into the socket 9980 and the intermediate component 9700, and acts as a stop during insertion (see [link]). Figures 127 to 130 ).

[0783] In one example, the connection between the base connector 4600 and the reservoir base 6050 is configured such that the pneumatic connection is completed before the electrical and mechanical connections. In one example, the electrical and mechanical connections can be formed simultaneously after the pneumatic connection, or they can be formed sequentially after the pneumatic connection. In another example, the pneumatic, electrical, and mechanical connections can be formed simultaneously when the base connector is inserted into the locking position.

[0784] To remove the air delivery duct 4170 from the reservoir base 6050, sufficient force can be used to pull the base connector 4600 outward from the reservoir base 6050 to release the retaining protrusion 4644 from the corresponding hole 9792.

[0785] Examples of tube recognition

[0786] Figure 35A A schematic diagram of one form of base and tube connection according to the present technology is shown. The base outlet 6090 may include a contact assembly 6800, which may be coupled to a corresponding contact assembly 4172 of the tube 4170 via four connections. The base outlet 6090 may be mechanically and electrically coupled to the tube 4170.

[0787] like Figure 35A As shown, contact assembly 6800 includes four connections coupled to processing circuitry (e.g., PCBA 7600). Two connections (heater + and heater -) are coupled to heater control circuitry, and two connections (+ sensor and - sensor) are coupled to sensing circuitry. In some instances, the + sensor and - sensor connections may be coupled to an NTC sensor. In some instances, the sensing circuitry may also be connected to the connections (heater + and heater -). The heater control circuitry and sensing circuitry may be included in a humidifier, such as PCBA 7600.

[0788] The heater control circuit can supply power to the heating element in tube 4170 via a switch (e.g., a transistor). The heater control circuit can control the duration, voltage, and / or frequency and / or period of the pulse width modulation (PWM) signal supplied to the heating element in tube 4170.

[0789] The sensing circuit can be configured to receive a signal from a converter (e.g., a negative temperature coefficient (NTC) thermistor) disposed in tube 4170, indicating the operation of the heating element in tube 4170. The converter can be disposed near the end of the tube's faceplate.

[0790] For example, the sensing circuit can measure the voltage and / or current of the converter to determine the operating characteristics (e.g., temperature) of the heating element. The heater control circuit can control the heating element based on the signals received by the sensing circuit and the setting for the heating tube 4170. Other sensors, i.e., humidity sensors, located anywhere in the tube, can also be connected in a similar manner.

[0791] The sensing circuit can automatically identify the type of tube 4170 connected to the base 6050. The type of tube connected to the base 6050 can be determined by the sensing circuit based on the unique electrical characteristics provided by one or more of the four electrical connectors 6805 for active and / or passive components in the tube 4170. Based on the indicated type of tube 4170 connected to the base, the controller can change the operating parameters of the system. For example, different heating control settings can be provided for different tubes (e.g., non-heated tubes, heated tubes, tubes with heat and moisture exchangers (HMEs), unknown tubes). In some instances, the settings can be modified based on the size of the identified air delivery tube (e.g., 15 mm, 19 mm), the presence and type of HME, the type of patient interface connected to the tube, etc. The type of tube connected to the base 6050 can be determined by the sensing circuit based on the unique electrical characteristics provided by one or more of the four connectors for active and / or passive components in the tube 4170.

[0792] like Figure 35A As shown, tube 4170 includes four connections for coupling to corresponding four connections in contact assembly 6800. The connections in the tube can be solid pins (such as...). Figure 24A (As shown), but not limited to. In some instances, these connections may be provided by, for example, lead frame terminals. In one instance, when tube 4170 is connected to the base, a solid pin in one device is connected to a corresponding spring pin in the other device (e.g., see...). Figure 20J ).

[0793] like Figure 35A As shown, the first circuit element 8022 is coupled to two pins of the transistor 4170, and the second circuit element 8024 is coupled to two other pins of the transistor 4170. Although in Figure 35A A single circuit element is shown, but the first and / or circuit element may include multiple active and / or passive circuit elements.

[0794] The first circuit element 8022 may include a heating element in tube 4170 and / or one or more other elements. The first circuit element 8022 may represent the resistance of the heating element.

[0795] The second circuit element 8024 may include a sensor in the form of a thermistor formed of a negative temperature coefficient (NTC) material. The parameters of the second circuit element 8024 (e.g., resistance) may change with the temperature of the tube. The sensing circuit may be configured to sense the temperature of the tube 4170 by monitoring changes in the parameters of the second circuit element 8024.

[0796] Figure 35B A circuit diagram showing one form of base and tube connection according to the present technology is shown. Figure 35A The first circuit element 8022 can be represented by two resistors 5R (approximately 5 ohms) coupled to the heater+ and heater- connections. This relates to the fact that the heating wire typically comprises one or more (usually two) copper wires connected sequentially to each other and having a total resistance of approximately 10 ohms. The combined length of the wire extends from the base connection of the tube to the face connection of the tube and back to the base connection of the tube. Figure 35A The second circuit element 8024 can be represented by a thermistor and two resistors 5R coupled to the NTC+ and NTC- connections. Figure 35A The thermistor used can be selected based on the type of air tube. A 10k thermistor can be installed in a 15mm air tube, a 100k thermistor can be installed in a 19mm air tube, and an open circuit can be installed in a passive air tube.

[0797] The heating wire 8022 is typically distributed along the length of the tube, and the sensor 8024 is typically located at the mask end of the tube. Therefore, the connecting wires for both the heating wire and the sensor extend along the length of the tube.

[0798] The sensing circuit can use a first circuit element and a second circuit element to identify the type of tube connected to the base 6050. In some instances, the unique electrical characteristics of one or more contact pins can be used to identify tube parameters. When the first and second circuit elements provide different resistance values, it allows the control circuitry in the humidifier to determine the type of tube connected and which control parameters are used for system operation. The sensing circuit can measure the resistance of the first and / or second circuit elements to determine the tube type. Alternatively, additional electrical pins (in addition to the four pins shown in Figures 35 and 36) can be included in the base connector 4600 of the air delivery tube 4170. These electrical pins are associated with unique characteristics (e.g., resistance) and can be used to indicate parameters such as type, and other characteristics associated with the tube.

[0799] As examples, different types of tubes may include: (1) a 4-wire 15mm heating tube that provides a heater wire resistance of 2×5R and an NTC resistance of 10K at 25°C; (2) a 4-wire 19mm heating tube that provides a heater wire resistance of 2×5R and an NTC resistance of 100K at 25°C; and (3) a passive non-heating tube that may have a standard ISO tapered shape.

[0800] Therefore, the type of tube connected can be detected by measuring the resistance combination of the second circuit element (e.g., NTC) and the first circuit element (e.g., heater wire) (in cases (1) and (2) above), detecting the electrical characteristics of one or more independent pins or combinations thereof, or detecting open circuits on two pairs of connections (in case (3) above).

[0801] The system can also be configured to automatically detect individual fault conditions in the connected active pipes, such as short circuits or open circuits on any of the four pipes, invalid values ​​(non-penetrating cracks) in the heater wires, and cross short circuits between pipes.

[0802] Examples of this technology not only provide a direct connection between the tube and the base, but also an electrical adapter. While such an adapter can allow connection to bases of different types of heating wire tubes, its primary purpose is to facilitate connection to bases of passive air tubes that can operate with or without an HME passive humidifier at the proximal end. Two main applications of using such an adapter are: (a) allowing a mechanical connection between the passive air tube and the base, and (b) providing a means for the system to detect the passive air tube.

[0803] Figure 36 A schematic diagram of the base and tube connection according to the present technology is shown. Figure 36 As shown, the contact assembly 6800 of the base can be connected to the passive tube 4170 via an adapter 8020. The adapter 8020 provides an electrical connection to the contact assembly 6800 of the base, while the passive tube 4170 typically does not have an electrical connection. In one example, the tube 4170 may provide a mechanical connection to the base 6050, and the tube adapter 8020 may provide an electrical connection. In some examples, the tube adapter 8020 may also be mechanically coupled to the base. Figures 24A to 24B A mechanical connection between a tube 4170 and a tube adapter 8020 according to one form of the present technology is shown.

[0804] In some instances, adapter 8020 may be part of a contact assembly. Adapter 8020 may be manufactured as an integral part of tube 4170 or removable from tube 4170. In this way, an air tube without electrical components such as heating elements and / or sensors may be provided with circuitry to identify the type of air tube connected to base 6050.

[0805] The tube 4170 includes a first circuit element and second circuit elements 8022 and 8024. Figure 35A on the contrary, Figure 36 The example shown includes first and second circuit elements 8022 and 8024 in the adapter. Only in this case do these circuit elements not represent the resistance of the heater wires and the NTC sensor / converter, but instead include simple resistors detected by the controller to identify the passive tube's connection to the system. Figure 24A As shown in Figure -B, the first and second circuit elements 8022 and 8024 can be disposed within a housing including the connection. The first and second circuit elements 8022 and 8024 can be directly connected to the connection disposed in the adapter 8020. In one example, the first circuit element 8022 includes a single resistor directly coupled to two connections in the adapter of the tube, and the second circuit element 8024 includes a single resistor directly coupled to two other connections in the adapter of the tube. In some examples, the adapter 8020 can be disposed outside and / or around the tube. In this example, the first and second circuit elements are disposed on the outer surface of the tube and / or the tube connector.

[0806] The first and second circuit elements in the adapter allow the sensing circuit in the humidifier to determine the type of tube connected to the base 6050. This is consistent with... Figure 35A The instances in are different, in Figure 35A In this context, the characteristics of a circuit including a heating element and / or a sensor (e.g., disposed within the tube) are used to determine the type of connection to the system. Therefore, in this example, it is necessary to select the values ​​of the first and second circuit elements of the passive tube such that they are located according to... Figure 35A The values ​​of the first and second circuit elements of the active transistor are outside the expected range. As will be discussed below, the specific electrical characteristics (i.e., resistance) of the NTC element must be considered in the operating environment, where it can be distributed over a wide range of values.

[0807] Figure 37 A schematic diagram illustrates the variation of tube NTC resistance at different temperatures for a 100k thermistor (typically used with a 19mm heating tube) and a 10k thermistor (typically used with a 15mm heating tube). The 100k and 10k thermistors can correspond to elements that can be included in... Figure 35A The thermistor in the second circuit element 8024 is shown. This technique is based on using a resistor connected to the NTC terminal of the adapter, which is significantly different from the actual NTC resistor in the legitimate operating region. For example... Figure 37As shown, during normal operation, 10k and 100k NTCs are not used in the region between approximately 27KΩ and 51KΩ, therefore the resistor used in the tube (or the adapter described below) can be selected to be 36KΩ or closer. Thus, when a tube with a 36kΩ resistor value is connected to the second circuit element 8024 of its adapter, the system will know that the tube is neither a 15mm tube using a 10kΩ thermistor nor a 19mm tube using a 100kΩ thermistor. While this atypical resistor value is described above as indicating the use of a passive tube with an adapter, a specific resistor on one or more electrical pins can be used to indicate various other parameters associated with the tube or even the mask in a tube-mask system. Such parameters can include the presence or absence of an HME in the tube / mask, the type of mask attached to the tube (nose or full face), etc.

[0808] To reduce the possibility of false detections (e.g., in the case of a 15mm heating element exposed to the sun and heated to 50°C before being immediately connected to the base), a first circuit element 8022 is used in the adapter, which connects the heater+ and heater+ terminals together through a resistor of a predetermined value (e.g., approximately 1 Kohm). A 1 Kohm resistor can conduct a maximum current of 24mA (at 100% PWM) and dissipates only 0.6W of power, which is sufficient for reliable measurement by the base subsystem circuitry.

[0809] Using the two circuit elements (e.g., resistors) described above in the adapter effectively eliminates the possibility of false detection of the connected tube while maintaining system safety. The use of resistors enables a low-cost identification system capable of accurate identification. Other circuit elements (e.g., resistors, capacitors, etc.) can be provided in parallel and / or series with the first and / or second circuit elements to provide characteristics different from those of the other circuits used for identification.

[0810] Figure 38 A schematic diagram of another form of base and tube connection according to the present technology is shown. Figure 38 The example shown is similar to Figure 36 The example shown uses only a single circuit element (e.g., a 36K resistor) in the adapter to reduce product cost. In this example, in addition to reducing the number of circuit elements, the number of connections in the adapter is also reduced. The reliability of the detection may be slightly reduced because the combination of a 36K NTC and an open circuit in the heating wire can also indicate a double fault in the tube (an NTC non-penetrating crack on the NTC wire + an open circuit on the heater wire), or a contaminated NTC terminal in a passive tube connected via an ISO tapered mechanical connection.

[0811] Figure 39Another form of base and tube connection according to this technology is shown. In this example, a portion o...

Claims

1. A water reservoir for use with a medical device for providing a pressurized supply of breathable gas to a patient within a pressure range suitable for treating respiratory disorders, the water reservoir comprising: A cavity configured to contain a volume of water to humidify the pressurized breathable gas supply; and Water storage tank inlet and water storage tank outlet, The water reservoir inlet includes a water reservoir inlet seal, wherein the water reservoir inlet seal includes a bellows configured to abut against a flat surface of the water reservoir base to form a surface seal when the water reservoir is engaged with the water reservoir base of the medical device. The water reservoir outlet does not include a water reservoir outlet seal. The water reservoir outlet includes an orifice surrounded by a flat surface configured to sealably engage a base seal mounted in or integrated into the water reservoir base of the medical device when the water reservoir is engaged with the water reservoir base.

2. The water storage device according to claim 1, wherein, The water reservoir includes a lid, a base, and a water reservoir seal that seals between the lid and the base.

3. The water storage device according to claim 2, wherein, The water reservoir inlet seal is integrally molded onto the cover.

4. The water storage device according to claim 1, wherein, The water reservoir inlet seal is integrally formed around the water reservoir inlet.

5. The water storage device according to claim 1, wherein, The water reservoir includes a first material that is relatively rigid compared to a second material forming the inlet seal of the water reservoir.

6. The water storage device according to claim 1, wherein, The water reservoir inlet and the water reservoir outlet face the same direction.

7. The water storage device according to claim 1, wherein, The water reservoir inlet is configured to receive the pressurized breathable gas supply from the water reservoir base, and the water reservoir outlet is configured to guide the pressurized breathable gas supply back to the water reservoir base with added humidity.

8. The water storage device according to claim 1, wherein: The water reservoir includes a lid, a base, and a water reservoir seal that seals between the lid and the base. The water reservoir inlet seal is integrally molded to surround the water reservoir inlet. The water reservoir inlet seal is integrally molded onto the cover. The water reservoir inlet and the water reservoir outlet face the same direction, and The water reservoir includes a first material that is relatively rigid compared to a second material forming the inlet seal of the water reservoir.

9. A medical device for providing a pressurized breathable gas supply to a patient within a pressure range suitable for treating respiratory disorders, said medical device comprising: A flow generator configured to pressurize the pressurized breathable gas supply within the pressure range; A water reservoir base, the water reservoir base being configured and arranged to receive the water reservoir in an operating position, the water reservoir base including a base inlet and a base outlet, the base inlet being arranged to supply pressurized gas to the water reservoir in use, and the base outlet receiving a supply of breathable gas with added humidity from the water reservoir in use. and The water storage device according to any one of claims 1 to 8.

10. The medical device according to claim 9, wherein, The base outlet includes a base seal for sealingly engaging with the water outlet only when the water reservoir is received in the water reservoir base.

11. The medical device according to claim 10, wherein, The base seal includes a bellows that abuts against the flat surface of the water reservoir to form a surface seal.

12. The medical device according to claim 9, wherein, The base inlet includes an aperture surrounded by the flat surface of the water reservoir, the flat surface being configured to sealably engage the water reservoir inlet seal when the water reservoir is received in the water reservoir base.

13. The medical device of claim 9, further comprising an air delivery tube configured to supply breathable gas, humidified in the water reservoir, to the patient interface, wherein, The base seal is permanently fixed to a tubular intermediate component, which further includes an external tube connector to which the air delivery tube is removably connected.

14. The medical device according to claim 13, wherein, The intermediate component is removably attached to the water reservoir base.

15. The medical device according to claim 9, wherein, The base seal is removably attached to the rear wall of the recess forming the base of the water reservoir.

16. The medical device of claim 9, further comprising a chassis supporting a blower for the flow generator, the chassis at least partially forming the water reservoir base such that the flow generator and the water reservoir base are integrated, the water reservoir base including a recess in which the water reservoir is at least partially received, the water reservoir engaging with the water reservoir base by at least partially sliding horizontally into the recess of the water reservoir base.

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