Liquid storage device

Abstract

The invention relates to the technical field of liquid reservoirs, and particularly discloses a liquid reservoir capable of heating a certain volume of liquid, the liquid reservoir comprises an upper cover, a middle layer and a bottom; the upper cover and the bottom are configured to be in completely detachable connection, the upper cover is provided with at least part of a platform, the middle layer is provided with a retainer and a sealing element, the retainer and part of the sealing element are configured to be connected and sealed with the bottom, part of the sealing element is configured to be in contact and sealed with the platform of the upper cover, and the retainer, the part of the sealing element and the platform jointly form a cavity capable of containing a certain volume of liquid. The bottom is provided with a heating piece used for conducting heat.

Description

Technical Field

[0001] The present invention relates to one or more of the treatment and improvement of respiratory-related diseases. Specifically, the present invention relates to the use and production of medical devices. Background Art

[0002] Sleep apnea syndrome (SAS), also known as sleep apnea hypopnea syndrome, generally refers to the recurrence of more than 30 episodes of apnea and hypopnea during 7 hours of sleep per night, or a sleep apnea hypopnea index of ≥5 times / h. Prolonged sleep apnea may be accompanied by a decline in sleep quality, increased nocturia, dry mouth and headache upon waking up, inattention during the day, easy fatigue, memory loss, etc., and will also be accompanied by complications such as coronary heart disease, hypertension, stroke, etc., seriously endangering human health. According to different pathogenesis, it is divided into obstructive (OSAS), central (CASA), and mixed (MSAS); among them, most patients with obstructive sleep disorders usually use a CPAP machine for home treatment.

[0003] Positive pressure ventilation therapy provides breathable gas with pressure through an air flow generator to enter the patient's airway to lift or open the patient's closed airway to achieve the treatment purpose. Positive pressure ventilation therapy usually involves an air flow generator, a liquid storage chamber, an air delivery pipe, a patient interface, and a data monitor. In the air delivery link, the liquid storage chamber is an important component. The pressurized gas flows out of the air flow generator, passes through the liquid storage chamber and carries the liquid molecules in the storage chamber before being input into the patient's oral and nasal airways, avoiding the long-term delivery of dry pressurized air to the patient's oral and nasal airways, resulting in dryness and discomfort of the patient's oropharynx and nasal mucosa, irritating the respiratory mucosa, causing an inflammatory reaction or making the respiratory secretions become viscous, thus increasing the burden on the throat and reducing the patient's treatment compliance. However, due to the need to avoid part loss for most upper and lower covers of liquid storage chambers on the market, their connection method is usually a non-detachable hinge, and non-detachable hinges are usually difficult to clean and it is easy to have a pinching accident during the patient's use, or the overall body is pulled backward due to the unstable center of gravity of the upper cover, resulting in the overall side turning of the liquid storage chamber; for a few detachable hinges, due to structural requirements, the wall thickness at the hinge is relatively thin or the area is relatively small, and it is easy to break during disassembly; in addition, most liquid storage devices on the market usually seal by sandwiching a silicone ring between the upper and lower covers. In order to ensure that the silicone ring can be effectively sealed in a fixed position, the upper and lower covers are usually designed with corresponding platforms 27 for sandwiching the silicone ring. Although the design of the platform 27 ensures the overall function, it increases the cost in production: due to the obstruction of the platform 27, the machine cannot be directly withdrawn during demoulding, increasing the production process and raising the overall production cost.

[0004] Therefore, it is necessary to design a liquid reservoir 1 that is convenient for both use and production, which is not only convenient for patients to use and clean, but also can simplify the production process and reduce the overall production cost. According to its functions, the liquid reservoir 1 is divided into three parts: the upper cover 2, the middle layer 3, and the bottom 4. The upper layer and the bottom 4 have the same functions as ordinary liquid reservoirs 1. The bottom 4 can store a certain volume of liquid, and the upper cover 2 is fixedly connected to the bottom 4 to form an integral body. Particularly, the design of the middle layer 3 combines the platform 27 and the silicone ring, enabling the middle layer 3 to achieve the overall sealing of the liquid reservoir 1 without relying on the platform 27 that hinders production, making the design and production of the upper cover 2 and the bottom 4 simpler. Summary of the Invention

[0005] Based on this, it is necessary to address the above deficiencies by providing a liquid reservoir that is convenient for both use and production.

[0006] A liquid reservoir for moistening pressurized breathable gas delivered to a patient, the liquid reservoir being such that when in working orientation with an air flow generator, the machine can supply heat to the liquid in the chamber, the liquid reservoir comprising:

[0007] An upper cover configured to snap onto the bottom and be sealingly connected to the middle layer to form a detachable integral body, the upper cover including a continuous wall forming a first opening that mates with the bottom, an air inlet and an air outlet provided on the wall for mating with the air flow generator, pipes extending from the air inlet and the air outlet, a snap-fit member and a clip extending from the first opening and fixed to the base, and a platform in contact with the middle layer, wherein at least one snap-fit member is provided at the front end of the upper cover, at least one clip is provided at the rear end of the upper cover, the two being configured to jointly connect to the bottom to restrict the movement of the upper cover, and the platform is configured to restrict the displacement of the middle layer and form a seal;

[0008] A middle layer configured to be detachably connected to the bottom, the middle layer including a stopper whose outer periphery is not less than the second opening of the bottom, and a seal in contact with the upper cover and the bottom, wherein the stopper is configured to contact the end face of the second opening of the bottom to prevent the middle layer from sinking;

[0009] The bottom includes a second opening that mates with the upper cover, at least one protrusion provided at the front end of the bottom for mating with the snap-fit member of the upper cover, at least one protrusion provided at the rear end of the bottom for connecting to the clip of the upper cover, an integrally formed wall, and a heating element, wherein the heating element is configured to conduct heat.

[0010] In one embodiment, the horizontal planes of the first opening of the upper cover and the second opening of the bottom may coincide or be parallel, and the first opening and the second opening may be in contact or non-contact.

[0011] In one embodiment, the platform of the upper cover that contacts the middle layer can be continuous or discontinuous.

[0012] In one embodiment, the periphery of at least part of the stopper of the middle layer is not less than the inner periphery of the second opening at the bottom.

[0013] In one embodiment, the bottom is provided with a locator, which can be in the form of a protrusion, a contour, etc.

[0014] The present invention also discloses a liquid reservoir for humidifying pressurized breathable gas delivered to a patient. When the liquid reservoir is in a working orientation with an air flow generator, the machine can provide heat to the liquid in the chamber. The liquid reservoir includes:

[0015] An upper cover configured to snap fit with the bottom and be hermetically connected to the middle layer to form a detachable whole. The upper cover includes a continuous wall forming a first opening for mating with the bottom, an air inlet and an air outlet provided on the wall for mating with the air flow generator, and pipes extending from the air inlet and the air outlet. A snap fit member and a clip fixed to the base extending from the first opening, and a platform in contact with the middle layer. Among them, the air inlet and the air outlet are in the same plane, the pipes extending from the air inlet and the air outlet are parallel to each other, and the pipe extending from the air inlet includes a first section and a second section. The first section and the second section are not parallel. The second section extends towards the bottom and is perpendicular to the horizontal plane, and the second section is shorter in length than the first section;

[0016] A middle layer configured to be detachably connected to the bottom and simultaneously seal the upper cover and the bottom;

[0017] The bottom includes a second opening for mating with the upper cover, at least one receiving portion is provided at the front end of the bottom for mating with the snap fit member of the upper cover, at least one receiving portion is provided at the rear end of the bottom for connecting with the clip of the upper cover, an integrally formed wall, and a heating sheet configured to conduct heat. Wherein, the joint area of the heating sheet and the wall of the bottom is not less than 66 mm 2 。

[0018] In one embodiment, the end faces of the first opening of the upper cover are in the same horizontal plane, the end faces of the second opening of the bottom are in the same horizontal plane. The horizontal planes where the first opening of the upper cover and the second opening of the bottom are located can be coincident or parallel, and the first opening and the second opening can be in contact or non-contact.

[0019] In one embodiment, the same plane where the air inlet and the air outlet are located is perpendicular to the horizontal plane where the end faces of the first opening of the upper cover and the second opening of the bottom are located.

[0020] In one embodiment, the middle layer has a stopper with at least a part of its periphery not smaller than the inner periphery of the second opening at the bottom, for preventing the middle layer from sinking.

[0021] In one embodiment, the heating plate is flush with the lowest point of the bottom.

[0022] The present invention also discloses a liquid reservoir for moistening pressurized breathable gas delivered to a patient. When the liquid reservoir and an air flow generator are in a working orientation, the machine can provide heat to the liquid in the chamber. The liquid reservoir includes:

[0023] An upper cover configured to snap fit with the bottom and be hermetically connected to the middle layer to form a detachable whole;

[0024] A middle layer configured to be detachably connected to the bottom and simultaneously seal the upper cover and the bottom;

[0025] The bottom includes a second opening opposite to the upper cover, at least one protruding from the front end of the bottom for connecting to the upper cover, at least one protruding from the rear end of the bottom for connecting to the upper cover, an integrally formed wall, and a heating sheet;

[0026] Wherein, the heating sheet is configured to conduct heat, is integrally formed with the wall of the bottom, and together forms a chamber for containing liquid. The minimum capacity of the chamber is 150 mL;

[0027] Wherein, at the connection of the wall of the bottom and the heating sheet, there is a clamping wall, the heating sheet is embedded in the clamping wall, and the area where the heating sheet is embedded in the wall of the bottom is not less than 66 mm 2 .

[0028] In one embodiment, the air inlet includes a first section and a second section, and the second section can be connected to a shunt member.

[0029] In one embodiment, the horizontal planes where the first opening of the upper cover and the second opening of the bottom are located can be coincident or parallel, and the first opening and the second opening can be in contact or non-contact.

[0030] In one embodiment, the middle layer has a stopper with at least a part of its periphery not smaller than the inner periphery of the second opening at the bottom, for preventing the middle layer from sinking.

[0031] The present invention also discloses a liquid reservoir for moistening pressurized breathable gas delivered to a patient. When the liquid reservoir and an air flow generator are in a working orientation, the machine can provide heat to the liquid in the chamber. The liquid reservoir includes:

[0032] The upper cover is configured to be snap-fitted with the bottom and hermetically connected to the middle layer to form a detachable whole. The upper cover includes a continuous wall forming a first opening that mates with the bottom, an air inlet and an air outlet provided on the wall and configured to cooperate with the air flow generator, and pipes extending from the air inlet and the air outlet. A snap-fastener and a clip that are fixed to the base and extend from the first opening, and a platform that contacts the middle layer, wherein the platform is configured to abut against the upper seal of the middle layer;

[0033] The middle layer is configured to be detachably connected to the bottom. The middle layer includes a stopper whose outer periphery is not less than the inner periphery of the second opening of the bottom, and seals that contact the upper cover and the bottom. Among them, the seals are divided into an upper seal and a lower seal. The stopper is configured to contact the end face of the second opening of the bottom to prevent the middle layer from sinking. The upper seal is configured to contact the platform of the upper cover to form a seal with the upper cover, and the outer edge of the lower seal layer fits against the inner wall of the bottom to form a seal with the bottom;

[0034] The bottom includes a second opening that mates with the upper cover, at least one receiving portion provided at the front end of the bottom for cooperating with the snap-fastener of the upper cover, at least one receiving portion provided at the rear end of the bottom for connecting with the clip of the upper cover, an integrally formed wall, and a heating sheet.

[0035] In one embodiment, the end faces of the first opening of the upper cover are in the same horizontal plane, the end faces of the second opening of the bottom are in the same horizontal plane, the horizontal planes where the first opening of the upper cover and the second opening of the bottom are located may coincide or be parallel, and the first opening and the second opening may be in contact or non-contact.

[0036] In one embodiment, the middle layer has a stopper with at least a part of its outer periphery not less than the inner periphery of the second opening of the bottom to prevent the middle layer from sinking.

[0037] In one embodiment, the upper seal and the lower seal layer achieve different deformation degrees through designs such as their wall thicknesses and structures.

[0038] The present invention also discloses a liquid reservoir for moistening pressurized breathable gas delivered to a patient. When the liquid reservoir and the air flow generator are in the working orientation, the machine can provide heat to the liquid in the chamber. The liquid reservoir includes:

[0039] The upper cover is configured to be snap-fitted with the bottom and hermetically connected to the middle layer to form a detachable whole. The upper cover includes a continuous wall forming a first opening that mates with the bottom, an air inlet and an air outlet provided on the wall for cooperating with the air flow generator, and pipes extending from the air inlet and the air outlet, a snap-fastener and a clip that extend from the first opening and are fixed to the base, and a platform that contacts the middle layer. Among them, at least one clip is provided at the rear end of the upper cover, and the clip forms a certain angle with the wall at the rear end of the upper cover;

[0040] The middle layer is configured to be detachably connected to the bottom and simultaneously seal the upper cover and the bottom;

[0041] The bottom includes a second opening that mates with the upper cover, at least one receiving portion provided at the front end of the bottom for cooperating with the snap-fastener of the upper cover, at least one receiving portion provided at the rear end of the bottom for connecting with the clip of the upper cover, an integrally formed wall, and a heating sheet;

[0042] Among them, after the upper cover is connected to the bottom, there is a gap for accommodating the upper seal of the middle layer between the platform of the upper cover and the end face of the second opening of the bottom, and the gap is smaller than the height of the upper seal.

[0043] In one embodiment, the bottom has at least one fixed portion for increasing the friction between the liquid reservoir and the air flow generator, and the fixed portion of the bottom can be small protrusions of the same or different materials.

[0044] In one embodiment, the end faces of the first opening of the upper cover are in the same horizontal plane, the end faces of the second opening of the bottom are in the same horizontal plane, and the horizontal planes where the first opening of the upper cover and the second opening of the bottom are located can be coincident or parallel, and the first opening and the second opening can be in contact or non-contact.

[0045] In one embodiment, the middle layer has a stopper at least partially around the periphery that is not smaller than the inner periphery of the second opening of the bottom to prevent the middle layer from sinking.

[0046] In one embodiment, the bottom further has a corresponding step configured to guide the liquid reservoir 1 into the air flow generator.

[0047] Implementing the liquid reservoir of the present invention has at least the following beneficial effects:

[0048] 1) The separable structure above and below the plane is easier to install and use: The connection method of the upper and lower covers of most liquid storage devices on the market is a hinge. The advantage of hinge connection is that it can ensure the integrity of the liquid storage device and avoid the loss of components. The hinge connection can be divided into two types: inseparable and detachable: a) Although the inseparable hinge connection ensures the integrity of the liquid storage device, there are unreasonable hinge designs. The upper cover of the liquid storage device cannot be fully spread out flat and can only hang in the air through the hinge, which is prone to uneven force and may cause the liquid storage device to be overturned or the cover to close during the process of filling with water. The former may cause the water in the liquid storage device to spill out, and the latter may cause the user's finger to be pinched; b) The detachable hinge form cannot be easily disassembled due to the mechanical structure of the hinge, and there is a risk of damage to the hinge at the upper cover during the disassembly process; Due to structural requirements, there is a certain gap at the connection of the hinge, which is easy to accumulate dirt and difficult to clean. The seal in the liquid storage device needs to contact and press with the platform of the upper and lower covers of the liquid storage device to form a seal, and the area of the platform needs to be sufficient to achieve good sealing. Most liquid storage devices on the market directly set the platform of the lower cover at the opening of the lower cover, which will block the direct production of the product during production, thus increasing the production cost. Design the connection structure of the upper and lower covers in the liquid storage device as a simple detachable connection, and redesign the seal 32 in combination with the plane. Divide the liquid storage device into three components: the upper cover 2, the middle layer 3, and the bottom 4, simplify the complex structure of the components, make the three components easier to demold without platforms 27 or protrusions during production, and the components are connected through simple mechanical connections: a) The connection between the upper cover 2 and the bottom 4 is connected by a protruding buckle form, avoiding the problem that the hinge cannot be disassembled; b) The middle layer 3 includes a seal 32 and a stopper 31, which are produced by an integrated molding method. The stopper 31 of the middle layer 3 contacts the direct opening end face of the bottom 4 to form a platform 27 that restricts the movement of the seal 32. The connection parts of the three components are all designed as planes, and through simple connection designs, it solves a) the production difficulties of the lower cover of the liquid storage device; b) it can achieve simple connection or disassembly of the upper and lower covers; c) Installing the middle layer 3 directly on the bottom 4 in a plane is easier to operate than installing the seal 32 on the upper cover 2 fixed by a hinge, improving user-friendliness; d) The opening end face of the bottom 4 being a plane is less likely to mislead the user's judgment of the water level compared to the non-planar opening end face of the bottom 4; e) The completely separable upper cover 2 and bottom 4 will not hinder the user from performing the water filling operation due to the presence of the upper cover 2.

[0049] 2) Structural design of the middle layer 3: After the sealing ring of a common liquid storage container is fixedly connected to the upper cover and then contacts the platform of the base, this connection method requires the user to ensure that the upper cover and the sealing ring are tightly connected, otherwise it is very likely that the sealing ring will fall off when the upper cover is buckled. Some liquid storage containers are made by integrally molding the sealing ring. This connection method usually makes the sealing ring difficult to replace, with high maintenance costs or replacement costs, and the choice of sealing material also needs to be based on the characteristics of the liquid storage container material, with a smaller selection range. Combining the platform of the limiting seal with a common seal can not only optimize the production of components but also provide double protection for the gas and liquid seals of the overall liquid storage container. The middle layer 3 includes a stop member 31, an upper seal 321, and a lower seal layer 322. The stop member 31 has at least part of its periphery not less than the inner periphery of the second opening 42 of the bottom 4, which is used to prevent the middle layer 3 from sinking. The upper seal includes a support arm with a certain height and an extended thin sheet. There is a certain gap between the thin sheet and the stop member 31 to facilitate the deformation of the upper seal 321 when it contacts the platform 27 of the upper cover 2. The periphery of the lower seal layer 322 is slightly larger than the inner periphery of the wall of the bottom 4 of the liquid storage container, and it can deform by itself during connection to seal the opening of the bottom 4, forming a tight anti-overflow ring.

[0050] 3) Integral molding connection 41 of the heating plate and the bottom 4: The heating plate is usually connected to the wall of the bottom through silicone, rubber, etc. Materials such as silicone and rubber are prone to deformation and aging due to continuous exposure to high temperatures, resulting in a reduction in the sealing performance of the liquid storage container. Therefore, the heating plate is integrally molded with the wall 41 of the bottom of the liquid storage container through a molding connection, which can effectively reduce the separated seams or connection points, provide higher structural strength and stability, reduce the risk of leakage, and because of reducing unnecessary processes, it can improve production and inspection efficiency, save time and labor costs, and reduce the defect rate of products.

[0051] 4) Environmentally friendly: Combining the above three points, the redesign of the liquid storage container greatly reduces unnecessary waste of resources in terms of both production and material selection, making the overall production process simpler, using less material while ensuring airtightness. The conservation of resources in the production process is conducive to reducing greenhouse gas emissions, thereby reducing the pressure on climate change, reducing the exploitation of natural resources, reducing the damage to the natural environment, and building a healthier and more sustainable future. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 It is a schematic structural diagram of the liquid storage container in Embodiment 1 of the present invention;

[0053] Figure 2 It is an exploded schematic structural diagram of the liquid storage container in Embodiment 1 of the present invention;

[0054] Figure 3Schematic diagram of the partition of the liquid storage in Embodiment 1 of the present invention;

[0055] Figure 4 Top view of the upper cover of the liquid storage in Embodiment 1 of the present invention;

[0056] Figure 5 Exploded view of the structure of the middle layer of the liquid storage in Embodiment 1 of the present invention;

[0057] Figure 6 Exploded view of the structure of the bottom of the liquid storage in Embodiment 1 of the present invention;

[0058] Figure 7 Form of the fastening member of the upper cover of the liquid storage in Embodiment 1 of the present invention;

[0059] Figure 8 Schematic diagram of the angle of the clip of the upper cover of the liquid storage in Embodiment 1 of the present invention;

[0060] Figure 9 Schematic diagram of the connection form between the upper cover and the bottom of the liquid storage in Embodiment 1 of the present invention;

[0061] Figure 10 Schematic diagram of the position of the platform of the upper cover of the liquid storage in Embodiment 1 of the present invention;

[0062] Figure 11 Schematic diagram of the form of the platform of the upper cover of the liquid storage in Embodiment 1 of the present invention;

[0063] Figure 12 Schematic diagram of the form of the platform of the upper cover of the liquid storage in Embodiment 1 of the present invention;

[0064] Figure 13 Schematic diagram of the form of the stopper of the middle layer of the liquid storage in Embodiment 1 of the present invention;

[0065] Figure 14 Schematic diagram of the structural form of the seal of the middle layer of the liquid storage in Embodiment 1 of the present invention;

[0066] Figure 15 Schematic diagram of the gap formed after the connection between the upper cover platform and the bottom of the liquid storage in Embodiment 1 of the present invention;

[0067] Figure 16 Schematic diagram of the structure of the connection between the stopper of the middle layer and the bottom of the liquid storage in Embodiment 1 of the present invention;

[0068] Figure 17 Schematic diagram of the structure of the connection between the wall of the bottom of the liquid storage and the heating plate in Embodiment 1 of the present invention;

[0069] Figure 18 Top view of the connection between the wall at the bottom of the liquid reservoir in Embodiment 1 of the present invention and the heating plate;

[0070] Figure 19 Schematic diagram of the connection between the air inlet of the upper cover of the liquid reservoir in Embodiment 2 of the present invention and the shunt member;

[0071] Figure 20 Schematic diagram of the structure of the shunt member in Embodiment 2 of the present invention;

[0072] Figure 21 Schematic diagram of the structure of the pipes parallel to each other in the horizontal plane extending from the uniform air inlet and air outlet of the upper cover of the liquid reservoir in Embodiment 3 of the present invention;

[0073] Figure 22 Schematic diagram of the structure of the pipes parallel to each other in the plane perpendicular to the horizontal plane extending from the uniform air inlet and air outlet of the upper cover of the liquid reservoir in Embodiment 3 of the present invention;

[0074] Figure 23 Schematic diagram of the structure of the pipes extending from the air inlet and air outlet of the upper cover of the liquid reservoir in Embodiment 3 of the present invention;

[0075] Figure 24 Schematic diagram of the first opening on the upper cover and the second opening on the bottom in different planes in one embodiment of the present invention. Detailed Description of the Invention

[0076] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following will describe in detail the specific embodiments of the present invention with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0077] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0078] The present invention divides the liquid reservoir 1 into three parts: the upper cover 2, the middle layer 3, and the bottom 4. As Figure 24As shown in -A, in some embodiments, the end faces of the first opening 22 of the upper cover 2 are on the same horizontal plane, and in some embodiments, the end faces of the second opening 42 of the bottom 4 are on the same horizontal plane. At this time, the horizontal planes where the first opening 22 of the upper cover 2 and the second opening 42 of the bottom 4 are located can be coincident or parallel, and the first opening 22 and the second opening 42 can be in contact or non-contact; as Figure 24 As shown in -B, in some embodiments, the end faces of the first opening 22 of the upper cover 2 are on different horizontal planes, presenting a stepped plane, and in some embodiments, the end faces of the second opening 42 of the bottom 4 are on different horizontal planes, presenting a stepped plane. The connection structure between the upper cover 2 and the bottom 4 is designed as a simple fully detachable connection, and the connection method can be snap-fit, magnetic attraction, push-pull buckle, etc. The intermediate layer is directly in contact with and connected to the bottom 4 to form the basis for sealing the bottom 4, and then joined to the upper cover 2. The platform 27 of the upper cover 2 presses the middle layer 3 to achieve an overall sealed state.

[0079] The following combines specific examples to illustrate several structures of a liquid storage device of the present invention.

[0080] Example 1

[0081] A liquid storage device 1 for humidifying and delivering pressurized breathable gas to a patient in this embodiment can provide heat to the liquid stored in the device chamber when connected to an air flow generator. The liquid storage device 1 includes an upper cover 2, an intermediate layer 3, and a bottom 4, wherein, as Figure 3 shown, the liquid storage device 1 is divided into a front end and a rear end, and the upper cover 2, the intermediate layer 3, and the bottom 4 have corresponding front ends and rear ends.

[0082] The upper cover 2 is used to be snap-fitted with the bottom 4 and in contact and sealed connection with the intermediate layer 3 to form a detachable whole; specifically, as Figures 1 to 18As shown in the figure, the upper cover 2 includes a continuous wall 21 that forms a first opening 22 that mates with the bottom 4, an air inlet 23 and an air outlet 24 provided on the wall for mating with the air flow generator, and pipes extending from the air inlet 23 and the air outlet 24. A fastening member 25 and a clip 26 that are fixed to the base and extend from the first opening 22, and a platform 27 that contacts the middle layer 3. The continuous wall 21 of the upper cover 2 can be smoothly formed or connected in a zigzag manner, and the outer wall contour can be designed according to the position provided by the air flow generator. The wall 21 has at least partial rigidity and can be made of one or more materials such as polyethylene, polypropylene, polycarbonate, silica gel, rubber, and thermoplastic elastomer. Protrusions or grooves can be provided on the wall 21 to increase friction, facilitate the user's grasping, or make a closer connection with the air flow generator. The end faces of the first opening 22 formed by the wall 21 are on the same horizontal plane, and the upper cover 2 and the bottom 4 are connected in shape; the inner periphery of the first opening 22 of the upper cover 2 is greater than or equal to the outer periphery of the seal 32 of the middle layer 3. The air inlet 23 and the air outlet 24 on the wall 21 are in the same plane, and the plane can be perpendicular to the horizontal plane, can form a certain angle with the horizontal plane, or be parallel to the horizontal plane. The contour shapes of the air inlet 23 and the air outlet 24 can be circular, oval, semicircular, or square; the pipes extending from the air inlet 23 and the air outlet 24 are parallel to each other, and the air inlet 23 includes a first section and a second section. The first section and the second section are not parallel. The second section extends towards the bottom 4 and is perpendicular to the horizontal plane, and the length of the second section is shorter than the length of the first section to prevent splashing of water when contacting or approaching the water surface; the pipes extending from the air inlet 23 and the air outlet 24 and the rigid part of the wall 21 of the upper cover 2 are made of the same material. At least one fastening member 25 that is fixed to the base extends from the front end of the first opening 22. The fastening member 25 can be connected to the receiving portion 43 of the bottom 4, such as Figure 7 As shown in the figure, the connection form can be snap-fit, magnetic attraction, etc., to fix the front end of the upper cover 2 and the front end of the bottom 4; the outer contour of the fastening member 25 can be square, U-shaped, or other shapes that are easy to fasten, and the fastening member 25 has an inclined surface to facilitate the fastening of the upper cover 2 and the bottom 4; the fastening member 25 can be made of materials such as polyethylene, polypropylene, polycarbonate, silica gel, and thermoplastic elastomer. At least one clip 26 that is fixed to the base extends from the rear end of the first opening 22. The clip 26 can be connected to the receiving portion 43 of the bottom 4 to fix the rear end of the upper cover 2 and the rear end of the bottom 4. The connection form can be snap-fit, magnetic attraction, etc.; as Figure 8 shown in the figure, the extended clip 26 forms a certain angle with the wall 21 at the rear end of the upper cover 2, and the angle is approximately 0 - 75°, so that there is a certain distance between the clip 26 and the bottom 4, which is convenient for the user's fingers to grasp. The upper cover 2 has a platform 27 that contacts the middle layer 3 (the platform does not necessarily refer to a step on the same horizontal plane). After the upper cover 2 and the bottom 4 are connected, as Figure 15As shown, there is a gap 2742 for accommodating the upper seal 32 of the middle layer 3 between the end face of the platform 27 and the second opening 42 of the bottom 4, and the gap 2742 is smaller than the height of the upper seal 32; as Figure 10 shown, the platform 27 can be arranged on the end face of the first opening 22 or above the end face. The platform 27 is extended by the wall 21 of the upper cover 2, and the maximum distance of the extension does not exceed 15 mm, ensuring that the production can be demolded and providing sufficient contact surface for the middle layer 3 to achieve sealing; as Figure 11 shown, the platform 27 can be uniformly extended or non-uniformly extended, and can be continuous or discontinuous, as Figure 12 shown, the contour shape of the inner periphery of the platform 27 can be the contour of the upper cover 2 in the horizontal plane, or can be square, oval or circular. The platform 27 can be made of one or more materials such as polyethylene, polypropylene, polycarbonate, silica gel, rubber, etc.

[0083] The middle layer 3 is configured to be detachably connected to the bottom 4. The middle layer 3 includes a stopper 31 whose outer periphery is not less than the inner periphery of the second opening 42 of the bottom 4, and a seal 32 that contacts the upper cover 2 and the bottom 4. The stopper 31 is configured to contact the end face of the second opening 42 of the bottom 4 to prevent the middle layer 3 from sinking; the outer periphery of the stopper 31 is not less than the inner periphery of the second opening 42 of the bottom 4, as Figure 13 shown, the contour shapes of the inner and outer peripheries of the stopper 31 can be the contour of the bottom 4 in the horizontal plane, or can be square, oval, wavy, etc.; as Figure 14As shown, the inner perimeter of the stopper 31 may have an upward anti-overflow wall 311 for preventing the liquid in the container from overflowing due to excessive liquid. The height of the anti-overflow wall 311 is approximately 1 - 8 mm. It has a downward stopper wall 312 that restricts the inward contraction of the lower seal 322 when it is squeezed by the wall 41 of the bottom 4 and thus cannot achieve the sealing function, and makes the connection between the lower seal 322 and the stopper 31 more stable. The height of the stopper wall 312 is approximately 1 - 15 mm; the thickness of the stopper 31 is approximately 1 - 15 mm to prevent the stopper 31 from being too thick and increasing the overall weight, which is not convenient for use. The main body of the stopper 31 can be made of rigid materials such as polyethylene, polypropylene, and polycarbonate. The anti-overflow wall 311 can be made of flexible materials with good sealing properties such as silicone and rubber, or the same material as the main body of the stopper 31. The seal 32 is divided into an upper seal 321 and a lower seal 322. The upper seal 321 is configured to contact the platform 27 of the upper cover 2 to form a seal with the upper cover 2. The outer edge of the lower seal layer 322 fits against the inner wall of the bottom 4 to form a seal with the bottom 4, and the inner edge is connected to the stopper 31. Specifically, the upper seal includes a support arm with a certain height and an extended thin sheet. There is a certain gap between the thin sheet and the stopper 31 to facilitate the deformation of the upper seal 321 when it contacts the platform 27 of the upper cover 2. The outer perimeter of the lower seal layer 322 is slightly larger than the inner perimeter of the wall of the bottom 4 of the liquid reservoir 1, and it can rely on its own material properties to deform during connection to seal the opening of the bottom 4, forming at least one tight anti-overflow ring; the upper seal 321 and the lower seal 322 can be made of the same material with the same hardness or different hardnesses, and can be flexible materials with good sealing properties such as silicone, rubber, and thermoplastic elastomer. The overall height of the upper seal 321 is approximately 3 - 10 mm, the thickness of the support arm is approximately 0.5 - 5 mm, and the thickness of the thin sheet is approximately 0.3 - 2.5 mm. The overall height of the lower seal 322 is approximately 3 - 15 mm, and the thickness is approximately 0.5 - 5 mm to prevent the flexible material from being too thin or too thick, making it difficult to deform and achieve a seal with the upper cover 2 or the bottom 4; at least one through-hole can be provided on the stopper 31 to allow the seal 32 to pass through during production, and at the same time form the upper seal 321 and the lower seal 322.

[0084] The bottom 4 includes a second opening 42 that mates with the upper cover 2. At least one receiving portion 43 is provided at the front end of the bottom 4 for mating with the fastening member 25 of the upper cover 2, and at least one receiving portion 43 is provided at the rear end of the bottom 4 for connecting with the clip 26 of the upper cover 2. The integrally formed wall 41 and the heating sheet 44 configured to transfer heat. The wall 41 of the bottom 4 is smooth and integrally formed with the heating sheet 44, and the outer wall contour can be designed according to the position provided by the air flow generator to form a chamber that can hold a certain volume of liquid. The minimum capacity of the chamber is 150 mL. A portion for the user's fingers to grip is provided at the rear end of the bottom 4; a corresponding step matching the air flow generator can extend from the wall 41, configured to guide the liquid reservoir 1 into the air flow generator. There is at least one fixing portion 45 on the wall 41 to increase the friction between the liquid reservoir 1 and the air flow generator; the wall 41 of the bottom 4 is made of a rigid material, which can be polyethylene, polypropylene, polycarbonate, etc. The fixing portion 45 can be a small protrusion made of the same material as the wall 41 of the bottom 4, or made of a flexible material such as silicone, rubber, thermoplastic elastomer, etc.; the end face of the second opening 42 of the bottom 4 is on the same horizontal plane. The first opening 22 of the bottom 4 is configured to contact and connect with the stopper 31 of the middle layer 3 to limit the downward movement of the middle layer 3. The receiving portions 43 at the front end and the rear end of the bottom 4 can be the same or different in form, and can be protrusions, grooves, magnets, etc. The bottom 4 can also be provided with positioning members for quickly positioning the upper cover 2 during installation by the user, and the positioning members can be in the form of protrusions, magnets, etc.; as Figure 17 and Figure 18 shown, the heating sheet 44 is integrally formed and connected with the wall 41 of the bottom 4. There is a clamping wall 441 at the connection between the wall 41 of the bottom 4 and the heating sheet 44. The heating sheet 44 is embedded in the clamping wall 441. The width of the clamping wall 441 is at least 0.3 mm. The joint area (the heating sheet 44 is embedded in the wall 41 of the bottom 4) between the wall 41 of the bottom 4 and the heating sheet 44 is not less than 66 mm 2 , the thickness of the heating sheet 44 does not exceed 1 mm, and the total area does not exceed 16000 mm 2 , ensuring a firm connection between the heating sheet 44 and the wall 41 of the bottom 4 and capable of conducting heat; the material of the heating sheet 44 can be stainless steel, aluminum alloy, ceramic coating, etc. Usually, stainless steel material is used. The stainless steel material has corrosion resistance and durability and can resist the erosion of many chemical substances such as water, steam, acids, alkalis, etc.; the heating plate is parallel to the horizontal plane and flush with the lowest point of the bottom 4 to ensure the overall stability of the liquid reservoir 1.

[0085] In another embodiment, the connection method between the heating plate and the wall 41 of the bottom 4 can also be connection methods that do not require adding additional materials such as ultrasonic connection, welding, etc.

[0086] In another embodiment, the upper cover can be in a form without a platform. The upper and lower seals in the middle layer have the same symmetrical structure. The outer edge of the upper seal 321 fits against the inner wall of the upper cover 2 to form a seal with the upper cover 2, and the outer edge of the lower seal layer 322 fits against the inner wall of the bottom 4 to form a seal with the bottom 4. Specifically, the periphery of the upper seal layer 321 is slightly larger than the inner periphery of the wall 21 of the upper cover 2 of the liquid reservoir 1, and the periphery of the lower seal layer 322 is slightly larger than the inner periphery of the wall 41 of the bottom 4 of the liquid reservoir 1. Both can rely on their own material properties to deform during connection to seal the opening, forming a tight anti-overflow ring.

[0087] Example 2

[0088] A liquid reservoir 1 for moistening and delivering pressurized breathable gas to a patient, when connected to an air flow generator and in a working position, can provide heat to the liquid stored in the chamber. The liquid reservoir 1 includes an upper cover 2, a middle layer 3, and a bottom 4. Among them, the liquid reservoir 1 is divided into a front end and a rear end, and the upper cover 2, the middle layer 3, and the bottom 4 have corresponding front and rear ends. The difference between the air delivery pipe provided in this embodiment and the liquid reservoir 1 in Embodiment 1 is that: a shunt member 5 is connected to the second section of the air inlet 23. As Figure 19 and Figure 20 shown, the pipes extended from the air inlet 23 and the air outlet 24 are parallel to each other, and the air inlet 23 includes a first section and a second section. The first section and the second section are not parallel. The second section extends towards the bottom 4 and is perpendicular to the horizontal plane, and can be connected to the shunt member 5 for changing the air flow direction. The maximum extent of the second section extending downward can be flush with the end face of the first opening 22 of the upper cover 2; the shunt member 5 is cylindrical, with an overall height of approximately 10 - 50 mm. One end has an interface 52 connected to the second section, and the other end is closed to prevent the air flow from directly blowing onto the water surface and causing splashing of water droplets, and the wall 51 formed by connecting the two ends. An opening 53 is provided on the wall 51, and the pressurized air flow flows out from the opening 53 to change the air flow direction blowing onto the water surface. A baffle 54 of a certain length can extend from the opening 53. The shunt member 5 can be made of one or more materials such as polyethylene, polypropylene, polycarbonate, silica gel, rubber, etc.; the connection method between the shunt member 5 and the second section can be connection by relying on the deformation of the material (such as snap connection or soft rubber friction connection), or mechanical connection such as magnetic attraction, or non-detachable connection such as ultrasonic wave.

[0089] Example 3

[0090] A liquid reservoir 1 for humidifying and delivering pressurized breathable gas to a patient, when connected to an air flow generator and in a working orientation, can provide heat to the liquid stored in the reservoir chamber. The liquid reservoir 1 includes an upper cover 2, a middle layer 3, and a bottom 4. Among them, the liquid reservoir 1 is divided into a front end and a rear end, and the upper cover 2, the middle layer 3, and the bottom 4 have corresponding front ends and rear ends. The difference between the air delivery pipe provided in this embodiment and the liquid reservoir 1 in Embodiment 1 is that: the pipes extended from the air inlet 23 and the air outlet 24 are not parallel. As Figure 21 shown, specifically, the pipes extended from the air outlet 24 and the air inlet 23 are uniform. The axes of the two are parallel in the horizontal plane and not parallel in the plane perpendicular to the horizontal plane. 1) The pipe extended from the air inlet 23 can be slightly inclined towards the rear end of the liquid reservoir 1 to prevent the gas with water vapor from flowing back into the machine interior. 2) The air inlet 23 includes a first section and a second section. The first section and the second section are not parallel, and the second section extends towards the bottom 4 and is perpendicular to the horizontal plane. As Figure 22 shown, specifically, the pipes extended from the air outlet 24 and the air inlet 23 are uniform. The axes of the two are not parallel in the horizontal plane and parallel in the plane perpendicular to the horizontal plane. The pipes can intersect or not intersect.

[0091] In another embodiment, specifically, the pipes extended from the air outlet 24 and the air inlet 23 are uniform. The axes of the two are not parallel in the horizontal plane and not parallel in the plane perpendicular to the horizontal plane.

[0092] In another embodiment, as Figure 23 shown, specifically, the pipes extended from the air inlet 23 and the air outlet 24 can also be non-uniformly variable.

[0093] In addition, the technical features in the above embodiments can be combined as needed to obtain a liquid reservoir 1 including all or part of the above technical features.

[0094] Implementing the heatable air delivery pipe of the present invention has at least the following beneficial effects:

[0095] 1) The separable structure above and below the plane is easier to install and use: The connection method between the upper and lower covers of most liquid storage devices on the market is a hinge. The advantage of hinge connection is that it can ensure the integrity of the liquid storage device and avoid component loss. The hinge connection can be divided into two types: inseparable and detachable: a) Although the inseparable hinge connection ensures the integrity of the liquid storage device, there are unreasonable hinge designs. The upper cover of the liquid storage device cannot be fully spread out flat, and can only hang in the air through the hinge, which is prone to uneven force and may cause the liquid storage device to be overturned or the cover to close during the process of filling with water. The former may cause the water in the liquid storage device to spill out, and the latter may cause the user's finger to be pinched; b) The detachable hinge form cannot be easily disassembled due to the mechanical structure of the hinge, and there is a risk of damage to the hinge at the upper cover during the disassembly process; Due to structural requirements, there is a certain gap at the connection of the hinge, which is easy to accumulate dirt and difficult to clean. The seal in the liquid storage device needs to contact and press with the platform of the upper and lower covers of the liquid storage device to form a seal, and the area of the platform needs to be sufficient to achieve good sealing. Most liquid storage devices on the market directly set the platform of the lower cover at the opening of the lower cover, which will block the direct production of the product during production, thus increasing the production cost. Design the connection structure between the upper and lower covers of the liquid storage device as a simple detachable connection, and redesign the seal 32 in combination with the plane. Divide the liquid storage device into three components: the upper cover 2, the middle layer 3, and the bottom 4, simplify the complex structure of the components, so that the three components are easier to demold without platforms 27 or protrusions during production, and the components are connected through simple mechanical connections: a) The connection between the upper cover 2 and the bottom 4 is connected by a protruding snap form, avoiding the problem that the hinge cannot be disassembled; b) The middle layer 3 includes a seal 32 and a stopper 31, which are produced by an integrally formed method. The stopper 31 of the middle layer 3 contacts the direct opening end face of the bottom 4 to form a platform 27 that restricts the movement of the seal 32. The connection parts of the three components are all designed as planes, and through simple connection designs, the following problems are solved: a) The difficulty in the production of the lower cover of the liquid storage device; b) The simple connection or disassembly of the upper and lower covers can be achieved; c) Installing the middle layer 3 directly on the flat bottom 4 is easier to operate than installing the seal 32 on the hinge-fixed upper cover 2, improving user friendliness; d) The opening end face of the bottom 4 being flat is less likely to mislead the user's judgment of the water level compared to the non-flat opening end face of the bottom 4; e) The completely separable upper cover 2 and bottom 4 will not hinder the user from performing the water filling operation due to the presence of the upper cover 2.

[0096] 2) Structural design of the middle layer 3: After the sealing ring of a common liquid storage container is fixedly connected to the upper cover and then contacts the platform of the base, this connection method requires the user to ensure that the upper cover and the sealing ring are tightly connected, otherwise it is very likely that the sealing ring will fall off when the upper cover is fastened. Some liquid storage containers and the sealing ring are made by integral molding. This connection method usually makes the sealing ring difficult to replace, with high maintenance costs or replacement costs. The selection of the sealing material also needs to be based on the characteristics of the liquid storage container material, and the selection range is smaller. Combining the platform of the limiting seal with the common seal can not only optimize the production of components but also provide double protection for the gas and liquid seals of the overall liquid storage container. The middle layer 3 includes a stop member 31, an upper seal 321, and a lower seal layer 322. The stop member 31 has at least part of its outer periphery not less than the inner periphery of the second opening 42 of the bottom 4, which is used to prevent the middle layer 3 from sinking. The upper seal includes a support arm with a certain height and an extended thin sheet. There is a certain gap between the thin sheet and the stop member 31 to facilitate the deformation of the upper seal 321 when it contacts the platform 27 of the upper cover 2. The outer periphery of the lower seal layer 322 is slightly larger than the inner periphery of the wall of the bottom 4 of the liquid storage container, and it can deform by itself during connection to seal the opening of the bottom 4, forming a tight anti-overflow ring.

[0097] 3) The heating plate is integrally formed and connected to the bottom 4 at 41: The heating plate is usually connected to the wall of the bottom through silicone, rubber, etc. Materials such as silicone and rubber are prone to deformation and aging due to continuous exposure to high temperatures, which will reduce the sealing performance of the liquid storage container. Therefore, the heating plate is integrally formed with the wall 41 of the bottom 4 of the liquid storage container by molding connection, which can effectively reduce the separated seams or connection points, provide higher structural strength and stability, reduce the risk of leakage, and because it reduces unnecessary processes, it can improve production and inspection efficiency, save time and labor costs, and reduce the defective rate of products.

[0098] 4) Environmentally friendly: Combining the above three points, the redesign of the liquid storage container greatly reduces unnecessary waste of resources both in terms of production and manufacturing and material selection. It makes the overall production process simpler, uses less materials while ensuring airtightness. Saving resources in the production process is conducive to reducing greenhouse gas emissions, thus reducing the pressure on climate change, reducing the exploitation of natural resources, alleviating the damage to the natural environment, and building a healthier and more sustainable future.

[0099] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as these combinations of technical features do not conflict, they should be considered as falling within the scope described in this specification.

[0100] The above-described embodiments merely represent several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A liquid reservoir for humidifying pressurized breathable gas delivered to a patient, the liquid reservoir being such that when in an operating orientation with an air flow generator, the machine can supply heat to the liquid in the chamber, the liquid reservoir comprising: An upper cover configured to snap-fit with a bottom and be hermetically connected to a middle layer to form a detachable whole. The upper cover includes a continuous wall forming a first opening that mates with the bottom, an air inlet and an air outlet provided on the wall and configured to cooperate with the air flow generator, and pipes extending from the air inlet and the air outlet. There are snap-fasteners and clips extending from the first opening and fixed to the base, and a platform in contact with the middle layer. Among them, at least one snap-fastener is provided at the front end of the upper cover, and at least one clip is provided at the rear end of the upper cover. The two are configured to jointly connect to the bottom to limit the movement of the upper cover, and the platform is configured to limit the displacement of the middle layer and form a seal; A middle layer configured to be detachably connected to the bottom. The middle layer includes a stopper whose outer periphery is not less than the second opening of the bottom, and a seal in contact with the upper cover and the bottom. Among them, the stopper is configured to contact the end face of the second opening of the bottom to prevent the middle layer from sinking; The bottom includes a second opening that mates with the upper cover, at least one protrusion provided at the front end of the bottom for mating with the snap-fastener of the upper cover, at least one protrusion provided at the rear end of the bottom for connecting to the clip of the upper cover, an integrally formed wall, and a heating sheet. Among them, the heating sheet is configured to conduct heat.

2. The liquid storage device according to claim 1, wherein The horizontal planes where the first opening of the upper cover and the second opening of the bottom are located can be coincident or parallel, and the first opening and the second opening can be in contact or non-contact.

3. The liquid storage device according to claim 1, characterized in that The platform of the upper cover in contact with the middle layer can be continuous or discontinuous.

4. The liquid storage device according to claim 1, characterized in that, At least a part of the outer periphery of the stopper of the middle layer is not less than the inner periphery of the second opening of the bottom.

5. The liquid storage device according to claim 1, wherein, The bottom is provided with a locator, which can be in the form of a protrusion, a contour, etc.

6. A liquid reservoir for humidifying pressurized breathable gas delivered to a patient, the liquid reservoir being such that when in an operating orientation with an air flow generator, the machine can supply heat to the liquid in the chamber, the liquid reservoir comprising: An upper cover configured to snap-fit with a bottom and be hermetically connected to a middle layer to form a detachable whole. The upper cover includes a continuous wall forming a first opening that mates with the bottom, an air inlet and an air outlet provided on the wall and configured to cooperate with the air flow generator, and pipes extending from the air inlet and the air outlet. The air inlet and the air outlet are in the same plane, the pipes extending from the air inlet and the air outlet are parallel to each other, and the pipe extending from the air inlet includes a first section and a second section. The first section and the second section are not parallel. The second section extends towards the bottom and is perpendicular to the horizontal plane, and the second section is shorter in length than the first section; A middle layer configured to be detachably connected to the bottom and simultaneously seal the upper cover and the bottom; The bottom includes a second opening that mates with the upper cover, at least one receiving portion is provided at the front end of the bottom for mating with the fastening member of the upper cover, at least one receiving portion is provided at the rear end of the bottom for connecting with the clip of the upper cover, an integrally formed wall, and a heating sheet configured to conduct heat, wherein the bonding area of the heating sheet with the wall of the bottom is not less than 66 mm 2 .

7. The liquid storage device according to claim 6, wherein The end faces of the first openings of the upper cover are in the same horizontal plane, and the end faces of the second openings of the bottom are in the same horizontal plane. The horizontal planes where the first openings of the upper cover and the second openings of the bottom are located can be coincident or parallel, and the first openings and the second openings can be in contact or non-contact.

8. The liquid storage device according to claim 6, wherein The same plane where the air inlet and the air outlet are located is perpendicular to the horizontal plane where the end faces of the first opening of the upper cover and the second opening of the bottom are located.

9. The liquid storage device according to claim 6, characterized in that, The middle layer has a stopper with at least part of its periphery not less than the inner periphery of the second opening of the bottom, which is used to prevent the middle layer from sinking.

10. The liquid storage device according to claim 6, characterized in that, The heating plate is flush with the lowest point of the bottom.

11. A liquid reservoir for humidifying pressurized breathable gas delivered to a patient. When the liquid reservoir is in an operating orientation with an air flow generator, the machine can supply heat to the liquid in the chamber. The liquid reservoir includes: An upper cover configured to snap onto the bottom and be hermetically connected to the middle layer to form a detachable whole; A middle layer configured to be detachably connected to the bottom and simultaneously seal the upper cover and the bottom; The bottom includes a second opening opposite to the upper cover, at least one protruding from the front end of the bottom for connecting to the upper cover, at least one protruding from the rear end of the bottom for connecting to the upper cover, an integrally formed wall, and a heating sheet; Wherein, the heating sheet is configured to conduct heat, is integrally formed with the wall of the bottom, and together forms a chamber for containing liquid, and the minimum capacity of the chamber is 150 mL; Wherein, a clamping wall is provided at the connection between the wall of the bottom and the heating sheet, the heating sheet is embedded in the clamping wall, and the area of the heating sheet embedded in the wall of the bottom is not less than 66 mm 2 .

12. The liquid storage device according to claim 11, wherein The air inlet includes a first section and a second section, and the second section can be connected to a shunt member.

13. The liquid storage device according to claim 11, wherein, The horizontal planes where the first opening of the upper cover and the second opening of the bottom are located can be coincident or parallel, and the first opening and the second opening can be in contact or non-contact.

14. The liquid storage device according to claim 11, wherein, The middle layer has a stopper with at least part of its periphery not less than the inner periphery of the second opening of the bottom, which is used to prevent the middle layer from sinking.

15. A liquid reservoir for humidifying pressurized breathable gas delivered to a patient. When the liquid reservoir is in an operating orientation with an air flow generator, the machine can supply heat to the liquid in the chamber. The liquid reservoir includes: An upper cover configured to snap onto the bottom and be hermetically connected to the middle layer to form a detachable whole. The upper cover includes a continuous wall forming a first opening for mating with the bottom, an air inlet and an air outlet provided on the wall for mating with the air flow generator and pipes extending from the air inlet and the air outlet, a snap-fit member and a clip extending from the first opening and fixed to the base, and a platform in contact with the middle layer, wherein the platform is configured to abut against the upper seal of the middle layer; A middle layer configured to be detachably connected to the bottom. The middle layer includes a stopper with a periphery not less than the inner periphery of the second opening of the bottom, and seals in contact with the upper cover and the bottom. Wherein, the seals are divided into an upper seal and a lower seal. The stopper is configured to contact the end face of the second opening of the bottom to prevent the middle layer from sinking. The upper seal is configured to contact the platform of the upper cover to form a seal with the upper cover. The outer edge of the lower seal layer fits against the inner wall of the bottom to form a seal with the bottom; The bottom includes a second opening for mating with the upper cover, at least one receiving portion is provided at the front end of the bottom for mating with the fastening member of the upper cover, at least one receiving portion is provided at the rear end of the bottom for connecting with the clip of the upper cover, an integrally formed wall, and a heating sheet.

16. The liquid storage device according to claim 15, wherein, The end faces of the first opening of the upper cover are in the same horizontal plane, the end faces of the second opening of the bottom are in the same horizontal plane, the horizontal planes where the first opening of the upper cover and the second opening of the bottom are located may coincide or be parallel, and the first opening and the second opening may be in contact or non-contact.

17. The liquid storage device according to claim 15, wherein, The middle layer has a stopper with at least part of its periphery not smaller than the inner periphery of the second opening of the bottom for preventing the middle layer from sinking.

18. The liquid storage device according to claim 15, wherein, The upper seal and the lower seal layer achieve different degrees of deformation through designs such as their wall thicknesses and structures.

19. A liquid reservoir for humidifying pressurized breathable gas delivered to a patient, the liquid reservoir being such that when in an operating orientation with an air flow generator, the machine can supply heat to the liquid in the chamber, the liquid reservoir comprising: An upper cover configured to snap-fit with the bottom and be hermetically connected to the middle layer to form a detachable whole, the upper cover includes a continuous wall forming a first opening for mating with the bottom, an air inlet and an air outlet provided on the wall for mating with the air flow generator and pipes extending from the air inlet and the air outlet, a fastening member and a clip extending from the first opening and fixed to the base, and a platform in contact with the middle layer, wherein at least one clip is provided at the rear end of the upper cover, and the clip forms an angle with the wall at the rear end of the upper cover; The middle layer is configured to be detachably connected to the bottom and simultaneously seal the upper cover and the bottom; The bottom includes a second opening for mating with the upper cover, at least one receiving portion is provided at the front end of the bottom for mating with the fastening member of the upper cover, at least one receiving portion is provided at the rear end of the bottom for connecting with the clip of the upper cover, an integrally formed wall, and a heating sheet; Wherein, after the upper cover is connected to the bottom, there is a gap for accommodating the upper seal of the middle layer between the platform of the upper cover and the end face of the second opening of the bottom, and the gap is smaller than the height of the upper seal.

20. The liquid storage device according to claim 19, wherein, The bottom has at least one fixed portion for increasing the friction between the liquid reservoir and the air flow generator, and the fixed portion of the bottom may be small protrusions of the same or different materials.

21. The liquid storage device according to claim 19, wherein, The end faces of the first opening of the upper cover are in the same horizontal plane, the end faces of the second opening of the bottom are in the same horizontal plane, the horizontal planes where the first opening of the upper cover and the second opening of the bottom are located may coincide or be parallel, and the first opening and the second opening may be in contact or non-contact.

22. The liquid storage device according to claim 19, wherein, The middle layer has a stopper with at least part of its periphery not smaller than the inner periphery of the second opening of the bottom for preventing the middle layer from sinking.

23. The liquid storage device according to claim 19, wherein, The bottom also has a corresponding step configured to guide the liquid reservoir into the air flow generator.

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