Humidifying tank and breathing assisting device

Abstract

The invention provides a humidifying tank and breathing assisting equipment, the humidifying tank comprises a tank body, a base plate and a sealing piece, the sealing piece is installed between the inner surface of the side peripheral wall of the tank body and the base plate, and the sealing piece is used for keeping the tank body and the base plate sealed and connected; a first fixing part is arranged at the open end of the tank body, the chassis comprises a second fixing part, and the second fixing part is connected with the first fixing part in a matched mode, so that the chassis is installed at the open end of the tank body and defines an inner cavity with the tank body to contain liquid; a limiting part is arranged on the tank body or the base plate and used for being matched with a main machine of the breathing assisting device to install the humidifying tank. The orthographic projection of the limiting part and the orthographic projection of the sealing piece on the same projection plane at least partially coincide in the projection direction perpendicular to the axial direction of the side peripheral wall. The technical problem that the sealing ring shields the water level height in the humidifying tank is mainly solved, and low-water-level recognition of the breathing assisting device is achieved; the chassis and the tank body are respectively provided with a fixing part, so that firm connection is ensured, and meanwhile, disassembly and assembly are convenient.

Description

Technical Field

[0001] The present invention relates to a breathing assistance device, and particularly to a humidifying tank on a breathing assistance device. Background Art

[0002] A humidifying tank is a component of breathing assistance devices such as ventilators, anesthesia machines, and oxygen therapy devices. The main unit of the breathing assistance device heats the water in the humidifying tank to generate hot water at a certain temperature, and heats and humidifies the gas flowing through the humidifying tank through the hot water. General humidifying tanks on the current market can be adapted to different main units, have a simple structure and low cost, and generally use algorithms for water level identification; on the main unit of some breathing assistance devices, a water level identification module is directly assembled outside the housing for the general humidifying tank, and a more accurate water level detection than algorithm identification is achieved by relying on sensors.

[0003] Humidifying tanks can be divided into two types: reusable humidifying tanks and disposable humidifying tanks. Among them, in order to support internal cleaning and disinfection after use, reusable humidifying tanks are usually designed with a detachable tank body and chassis. In order to prevent liquid leakage during use and the chassis and tank body from detaching when the pressure inside the humidifying tank is relatively high, the issues of reliable sealing and connection between the chassis and the tank body need to be emphasized, and at the same time, consideration should be given to how to facilitate the disassembly and assembly of the humidifying tank. Currently, the sealing and connection between the chassis and the tank body of reusable humidifying tanks are completely achieved by relying on a sealing ring. In order to maintain sufficient fixing connection force, the sealing ring is usually made relatively thick, blocking the position of the water level height inside the humidifying tank, resulting in the water level identification module on the main unit of the breathing assistance device being unable to identify the lower water level inside the humidifying tank. Moreover, due to the relatively large connection force of the thickened sealing ring, it is very difficult for users to disassemble the chassis and the tank body for cleaning, but the connection force of the thickened sealing ring is usually not sufficient to ensure the explosion-proof problem of the humidifying tank during use due to high pressure. Summary of the Invention

[0004] In view of this, the embodiments of the present application expect to provide a humidifying tank and a breathing assistance device, aiming to solve the technical problem that the sealing ring blocks the water level height inside the humidifying tank, resulting in the water level identification module on the main unit of the breathing assistance device being unable to identify the lower water level inside the humidifying tank.

[0005] The embodiments of the present application provide a humidifying tank for heating and humidifying gas in cooperation with the main unit of a breathing assistance device, including:

[0006] A tank body, the tank body includes a circumferentially closed side wall and a top surface connected to one end of the side wall, the other end of the side wall is an open end, and a first fixing portion is provided at the open end; the tank body is further provided with an inlet port for receiving gas and an outlet port for discharging humidified gas;

[0007] A chassis, the chassis includes a second fixing part, the second fixing part is cooperatively connected with the first fixing part, so that the chassis is installed at the opening end of the tank body and encloses an inner cavity with the tank body to accommodate liquid; and

[0008] A seal, the seal is installed between the inner surface of the side peripheral wall of the tank body and the chassis, and is used to keep the tank body and the chassis sealed and connected;

[0009] Wherein, a limiting part is provided on the tank body or the chassis, and is used to cooperate with the main body of the breathing assistance device to install the humidifying tank;

[0010] Projecting along the direction perpendicular to the axial direction of the side peripheral wall, the positive projection of the limiting part and the seal on the same projection plane at least partially overlap.

[0011] In some embodiments, projecting along the direction perpendicular to the axial direction of the side peripheral wall, the overlapping part of the positive projection of the limiting part and the seal on the same projection plane has a length along the axial direction of the side peripheral wall of at least half of the thickness of the sealing ring along the axial direction of the side peripheral wall.

[0012] In some embodiments, the limiting part is provided at the opening end of the tank body and extends radially outward along the outer surface of the side peripheral wall of the tank body.

[0013] In some embodiments, the chassis includes a bottom plate part, and the limiting part is provided on the side of the bottom plate part facing the opening end of the tank body, and the limiting part surrounds the outer surface of the side peripheral wall of the tank body.

[0014] In some embodiments, the limiting part is continuously or discontinuously provided around the outer surface of the side peripheral wall of the tank body.

[0015] In some embodiments, the chassis includes a bottom plate part and a protruding part, the protruding part is provided on the side of the bottom plate part facing the inner cavity of the tank body, and when the chassis is cooperatively installed with the tank body, the protruding part is located in the inner cavity of the tank body; the seal is installed between the protruding part and the inner surface of the side peripheral wall of the tank body to keep the tank body and the chassis sealed and connected.

[0016] In some embodiments, projecting along the direction perpendicular to the axial direction of the side peripheral wall, the positive projection of the limiting part and the protruding part on the same projection plane at least partially overlap.

[0017] In some embodiments, a first interaction force is formed between the first fixing part and the second fixing part, and a second interaction force is formed between the tank body and the chassis by the seal, and the directions of the first interaction force and the second interaction force are different.

[0018] In some embodiments, the first fixing portion is disposed at the bottom of the opening end of the tank body, and the second fixing portion is disposed on the side of the chassis facing the tank body. The first fixing portion and the second fixing portion cooperate with each other to connect the tank body and the chassis.

[0019] In some embodiments, the first fixing portion is disposed on the outer surface of the side peripheral wall of the tank body, and the second fixing portion is disposed on the side of the limiting portion of the chassis facing the side peripheral wall of the tank body. The first fixing portion and the second fixing portion cooperate with each other to connect the tank body and the chassis.

[0020] In some embodiments, the first fixing portion is disposed on the inner surface of the side peripheral wall of the tank body, and the second fixing portion is disposed on the side of the protruding portion of the chassis facing the side peripheral wall of the tank body. The first fixing portion and the second fixing portion cooperate with each other to connect the tank body and the chassis.

[0021] In some embodiments, the first fixing portion and the second fixing portion are buckled with each other.

[0022] In some embodiments, the first fixing portion is a hook structure, and the second fixing portion includes an opening groove and a step portion disposed in the opening groove. The opening of the opening groove can accommodate the hook structure to enter, so that the hook structure is rotated and buckled with the step portion, and the hook structure and the step portion cooperate with each other; or, the hook structure is rotated in the reverse direction and separated from the step portion, so that the hook structure exits from the opening of the opening groove.

[0023] In some embodiments, the first fixing portion is a hook structure disposed at the bottom of the opening end of the tank body. The hook structure is L-shaped, and the L-shaped hook structure includes a first hook portion and a second hook portion. The first hook portion extends along the axial direction of the side peripheral wall towards the chassis, and the second hook portion extends perpendicular to the first hook portion;

[0024] The second fixing portion is disposed on the chassis and includes an opening groove and a step portion disposed in the opening groove. The step portion and the projection of the opening groove along the axial direction of the side peripheral wall partially overlap. The opening of the opening groove can accommodate the second hook portion to enter, and the second hook portion is rotated to cooperate with the step portion.

[0025] In some embodiments, the second hook portion extends perpendicular to the first hook portion along the radial direction of the side peripheral wall, or the second hook portion extends perpendicular to the first hook portion along the circumferential direction of the side peripheral wall.

[0026] In some embodiments, the first fixing portion and the second fixing portion are threadedly connected.

[0027] An embodiment of the present application further provides a breathing assistance device for heating and humidifying the gas delivered to a user, which is characterized in that it includes a humidifying tank and a breathing assistance device main body. Among them,

[0028] The humidifying tank includes a tank body, a chassis and a seal, and is used to heat the liquid in the humidifying tank to heat and humidify the gas; among them, the tank body includes a circumferentially closed side wall and a top surface connected to one end of the side wall, and the other end of the side wall is an open end. The tank body is also provided with an inlet port for receiving gas and an outlet port for discharging humidified gas; the chassis is installed at the open end of the tank body and encloses an inner cavity with the tank body to accommodate liquid; a limiting portion is also provided on the tank body or the chassis for cooperating with the breathing assistance device main body to install the humidifying tank; the seal is installed between the inner surface of the side wall of the tank body and the chassis for keeping the tank body and the chassis sealed and connected;

[0029] The breathing assistance device main body includes a heating module, a housing and a water level identification module. Among them, the heating module is installed in the housing and is located at the bottom of the humidifying tank for providing heat energy to the humidifying tank to heat the liquid in the humidifying tank; the water level identification module is installed in the housing and is in direct contact with the outer surface of the side wall of the humidifying tank for identifying the water level in the humidifying tank;

[0030] Among them, along the direction of projection perpendicular to the axial direction of the side wall, at least a part of the positive projection of the limiting portion and the seal on the same projection plane coincides.

[0031] In some embodiments, the bottom of the water level identification module is higher than the top of the seal in the axial direction of the humidifying tank.

[0032] In some embodiments, a first fixing portion is provided at the open end of the humidifying tank, and the chassis of the humidifying tank includes a second fixing portion. The second fixing portion is cooperatively connected with the first fixing portion to install the chassis at the open end of the tank body.

[0033] In some embodiments, the limiting portion is provided at the open end of the tank body and extends radially outward along the outer surface of the side wall of the tank body.

[0034] In some embodiments, the chassis includes a bottom plate portion, and the limiting portion is provided on the side of the bottom plate portion facing the open end of the tank body, and the limiting portion surrounds the outer surface of the side wall of the tank body.

[0035] In some embodiments, the limiting portion is continuously or discontinuously provided around the outer surface of the side wall of the tank body.

[0036] In some embodiments, the chassis includes a bottom plate portion and a protruding portion. The protruding portion is disposed on one side of the bottom plate portion facing the inner cavity of the tank. When the chassis is cooperatively installed with the tank, the protruding portion is located in the inner cavity of the tank; the seal is installed between the protruding portion and the inner surface of the side peripheral wall of the tank, so as to keep the tank and the chassis sealed and connected.

[0037] In some embodiments, when projected along a direction perpendicular to the axial direction of the side peripheral wall, the positive projections of the limiting portion and the protruding portion on the same projection plane at least partially overlap.

[0038] In some embodiments, the bottom of the water level identification module is higher than the top of the protruding portion in the axial direction of the humidifying tank.

[0039] In some embodiments, a first interaction force is formed between the first fixing portion and the second fixing portion, and a second interaction force is formed between the tank and the chassis by the seal. The directions of the first interaction force and the second interaction force are different.

[0040] In some embodiments, the first fixing portion is disposed at the bottom of the opening end of the tank, and the second fixing portion is disposed on one side of the chassis facing the tank. The first fixing portion and the second fixing portion cooperate with each other to connect the tank and the chassis.

[0041] In some embodiments, the first fixing portion is disposed on the outer surface of the side peripheral wall of the tank, and the second fixing portion is disposed on one side of the limiting portion of the chassis facing the side peripheral wall of the tank. The first fixing portion and the second fixing portion cooperate with each other to connect the tank and the chassis.

[0042] In some embodiments, the first fixing portion is disposed on the inner surface of the side peripheral wall of the tank, and the second fixing portion is disposed on one side of the protruding portion of the chassis facing the side peripheral wall of the tank. The first fixing portion and the second fixing portion cooperate with each other to connect the tank and the chassis.

[0043] In some embodiments, the first fixing portion and the second fixing portion are buckled with each other.

[0044] In some embodiments, the first fixing portion is a hook structure, and the second fixing portion includes an opening groove and a step portion disposed in the opening groove. The opening of the opening groove can accommodate the hook structure to enter, so that the hook structure is rotated and buckled with the step portion, and the hook structure and the step portion cooperate with each other; or, the hook structure is reversely rotated and separated from the step portion, so that the hook structure exits from the opening of the opening groove.

[0045] In some embodiments, the first fixing portion and the second fixing portion are threadedly connected.

[0046] In some embodiments, the water level identification module includes a capacitance water level sensor.

[0047] The humidifying canister and the respiratory assistance device provided by the embodiments of the present application, by optimizing the size of the sealing ring of the humidifying canister, when projected in a direction perpendicular to the axial direction of the side peripheral wall, at least a part of the positive projection of the limiting portion and the sealing member on the same projection plane coincides, while ensuring the sealing performance, it also solves the problem that the sealing ring blocks the water level height in the humidifying canister, and realizes the low water level identification of the respiratory assistance device. At the same time, by respectively arranging fixing portions on the chassis and the canister of the humidifying canister, the firm connection between the chassis and the canister is ensured, and it is also convenient for disassembly and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a combined state three-dimensional view of an embodiment of a humidifying canister in the present invention;

[0049] Figure 2 It is a combined state cross-sectional view of an embodiment of a humidifying canister in the present invention;

[0050] Figure 3 It is a separated state schematic diagram of an embodiment of a humidifying canister in the present invention;

[0051] Figure 4A is Figure 2 a partial enlarged schematic diagram of a part A in an embodiment;

[0052] Figure 4B is Figure 2 a partial enlarged schematic diagram of another embodiment of part A in;

[0053] Figure 4C is Figure 2 a partial enlarged schematic diagram of the third embodiment of part A in;

[0054] Figure 5A is Figure 3 a schematic diagram of the second fixing portion in;

[0055] Figure 5B is Figure 3 a combined state schematic diagram of the first fixing portion and the second fixing portion in;

[0056] Figure 6 It is a separated state three-dimensional view of an embodiment of a respiratory assistance device in the present invention.

[0057] List of the feature names corresponding to the reference numerals in the drawings:

[0058] 1 - Respiratory assistance device;

[0059] 10 - Humidifying tank; 20 - Housing; 30 - Water level identification module; 40 - Heating module;

[0060] 100 - Tank body; 200 Sealing ring; 300 - Chassis; 400 - Limiting part;

[0061] 110 - Side peripheral wall; 120 - Top surface; 130 - First fixing part; 310 - Bottom plate part; 320 - Protruding part; 330 - Second fixing part;

[0062] 131 - First hook part; 132 - Second hook part; 331 - Step part; 332 - Opening part. Detailed implementation manner

[0063] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0064] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "inner", "outer", "thickness", "length", etc. are based on the orientation or positional relationships described in the specification. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0065] In the description of the present application, it should be noted that unless otherwise clearly defined and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0066] It should be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or apparatus comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or apparatus.

[0067] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. To simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0068] The embodiments of the present application provide a humidifying chamber and a respiratory assistance device. In the embodiments of the present application, the respiratory assistance device is used to heat and humidify the gas flow delivered to the user and can be used in devices such as ventilators, anesthesia machines, and oxygen therapy devices that require heating and humidifying of respiratory gases. The humidifying chamber is a conventional structure on the respiratory assistance device and can heat the liquid in the chamber to heat and humidify the gas flow delivered to the user. The water level in the humidifying chamber is identified through the water level identification module of the respiratory assistance device. The humidifying chamber provided by the embodiments of the present application is designed with a detachable tank body and a chassis, and the tank body and the chassis are kept sealed and connected through a sealing ring. To prevent the sealing ring from blocking the water level height in the humidifying chamber, the embodiments of the present application optimize the size of the sealing ring so that when projected in the direction perpendicular to the axial direction of the side peripheral wall, the limiting portion and the sealing member at least partially overlap in the positive projection on the same projection plane, realizing low water level identification of the respiratory assistance device. At the same time, to enhance the connection force between the chassis and the tank body of the humidifying chamber, fixing portions are respectively provided on the chassis and the tank body to ensure firm connection while also facilitating disassembly and assembly. The humidifying chamber and the respiratory assistance device provided by the embodiments of the present application are described in detail below.

[0069] An embodiment of a humidifying chamber in the present application:

[0070] In some embodiments, please refer to Figures 1 to 3, the humidifying tank 10 includes a tank body 100, a sealing ring 200, and a chassis 300. Among them, the tank body 100 includes a circumferentially closed side wall 110 and a top surface 120 connected to one end of the side wall 110, and the other end of the side wall 110 is an open end. The cross-section of the tank body 100 is generally circular, and the side wall 110 is a cylindrical surface or a conical surface with a small taper. The tank body 100 is also provided with an inlet port and an outlet port. The humidifying tank 10 receives a gas flow through the inlet port, heats and humidifies the gas flow by heating the liquid in the tank, and finally discharges the heated and humidified gas flow through the outlet port. The chassis 300 is installed at the open end of the tank body 100 and encloses an inner cavity with the tank body 100 to accommodate the liquid. The seal 200 is installed between the inner surface of the side wall 110 and the chassis 300 to keep the tank body 100 and the chassis 300 sealed and connected.

[0071] Please refer to Figure 3 , a first fixing portion 130 is provided at the open end of the tank body 100, and a second fixing portion 330 is provided on the chassis 300. The first fixing portion 130 and the second fixing portion 330 can be cooperatively connected to ensure a firm connection between the tank body 100 and the chassis 300. The mutual force formed by the sealing ring 200 between the tank body 100 and the chassis 300 and the mutual force formed by the cooperative connection between the first fixing portion 130 and the second fixing portion 330 jointly guarantee the sealing and connection between the tank body 100 and the chassis 300, so that the tank body 100 and the chassis 300 will not be separated even when the internal pressure in the humidifying tank 10 is relatively high. In some embodiments, the directions of these two mutual forces are different, so that the connection between the tank body 100 and the chassis 300 is closer.

[0072] In addition, the humidifying tank 10 further includes a limiting portion 400. The limiting portion 400 is provided at the open end of the tank body 100 and extends radially outward along the outer surface of the side wall 110 for cooperating with the main body of the respiratory assistance device to install the humidifying tank 10 and realize the positioning of the humidifying tank 10 in the vertical direction. In order to prevent the sealing ring 200 from blocking the water level height in the humidifying tank 10, the size of the sealing ring 200 is optimized in the embodiments of the present application, so that when projected along the direction perpendicular to the axis of the side wall 110, at least a part of the positive projection of the limiting portion 400 and the seal 200 on the same projection plane coincides.

[0073] Specifically, in one embodiment, please refer to Figure 4A and Figure 4B , when projected along the direction perpendicular to the axis of the side wall 110, the length of the overlapping part of the positive projection of the limiting portion 400 and the seal 200 on the same projection plane along the axis of the side wall 110 is at least half of the thickness of the sealing ring 200 along the axis of the side wall 110.

[0074] In another embodiment, please refer toFigure 4C When projected along a direction perpendicular to the axial direction of the side circumferential wall 110 , the length of the overlapping portion of the positive projection of the limiting portion 400 and the sealing member 200 on the same projection plane along the axial direction of the side circumferential wall 110 is less than half of the thickness of the sealing ring 200 along the axial direction of the side circumferential wall 110 .

[0075] Through the above design, the sealing and connection of the humidification tank can be ensured through the cooperation between the sealing part 200 and the first fixing part 130 and the second fixing part 330, and the size of the sealing ring 200 can be optimized so that the sealing ring 200 does not block the water level in the humidification tank 10 as much as possible, thereby realizing the recognition of the low water level in the humidification tank by the respiratory assistance device.

[0076] Of course, in some other embodiments, the humidification tank 10 may also be in other shapes, for example, the overall profile is cylindrical, and the cross section of the sealing ring 200 may be circular, square or any other shape that can play a sealing role. Figure 1 The inlet port and the outlet port are not directly opened on the top surface 120, but protrude from the top surface 120. It can be understood that the inlet port and the outlet port can be arranged on the top surface 120 of the humidification tank 10, and can also be arranged on the side peripheral wall 110 of the humidification tank.

[0077] In some other embodiments, see Figure 4B The chassis 300 includes a bottom plate portion 310 , and the limiting portion 400 is disposed on a side of the bottom plate portion facing the opening end of the tank body 100 and surrounds the outer surface of the side peripheral wall 110 .

[0078] It is understandable that the limiting portion 400 may be continuously disposed around the outer surface of the side circumferential wall 110 , or may be discontinuously disposed around the outer surface of the side circumferential wall 110 .

[0079] In some embodiments, the bottom plate 300 further includes a protrusion 320, which is disposed on the side of the bottom plate 310 facing the inner cavity of the tank body 100. When the tank body 100 and the bottom plate 300 are installed in cooperation, the protrusion 320 is located in the inner cavity of the tank body 100. The sealing member 200 is installed between the protrusion 320 and the inner surface of the side peripheral wall 110 to maintain a seal and connection between the tank body 100 and the bottom plate 300.

[0080] In some embodiments, the protrusion 320 may be provided with a limiting groove 321 for placing the seal 200, so that the seal 200 can be placed between the protrusion 320 and the inner surface of the side wall 110 to ensure the seal and connection between the tank body 100 and the bottom plate 300. It is understandable that the seal 200 can be placed in the limiting groove 321 of the protrusion 320 in its entirety or in part.

[0081] In some embodiments, when projected along a direction perpendicular to the axis of the side peripheral wall 110, the limiting portion 400 may also at least partially coincide with the positive projection of the protruding portion 320 on the same projection plane, so as to reduce the height of the protruding portion 320, thereby solving the problem that the protruding portion extends too high into the inner cavity of the tank body 100 and blocks the water level in the humidifying tank 10.

[0082] In a specific embodiment, please refer to Figure 3 、 Figure 5A and Figure 5B , the first fixing portion 130 is a buckle structure, which is arranged at the bottom of the opening end of the tank body 100. The buckle structure is in an L shape and includes a first buckle portion 131 and a second buckle portion 132. The first buckle portion 131 extends along the axis of the side peripheral wall 110 towards the chassis 300, and the second buckle portion 132 extends perpendicular to the first buckle portion 131 along the radial direction of the side peripheral wall 110. The second fixing portion 330 is arranged on the chassis 300 and includes an opening groove and a step portion 331 arranged in the opening groove. The step portion 331 partially coincides with the projection of the opening groove along the axis of the side peripheral wall 110, and the step portion 331 is close to the first end of the opening groove; an opening portion 332 is formed between the step portion 331 and the second end of the opening groove, so that the opening portion 332 of the opening groove can accommodate the second buckle portion 132 to enter; a gap portion 333 is formed between the step portion 331 and the groove wall connecting the first end and the second end of the opening groove, so that the gap portion 332 of the opening groove can accommodate the first buckle portion 131 to enter; when connecting, the second buckle portion 132 enters from the opening portion 332, and after rotation, the first buckle portion enters the gap portion 333, and the second buckle portion 132 cooperates with the step portion 331, so as to buckle the tank body 100 and the chassis 300.

[0083] It can be understood that the number of buckle structures may be equal to the number of opening grooves, or may be less than the number of opening grooves. The number of buckle structures or opening grooves may be two, or more than two. For example, please refer to Figure 3 , the number of both the buckle structure and the opening groove is four.

[0084] In another embodiment, the second buckle portion 132 may also extend perpendicular to the first buckle portion 131 along the circumferential direction of the side peripheral wall 110. The step portion 331 is close to the first end of the opening groove. An opening portion 332 is formed between the step portion 331 and the second end of the opening groove, so that the opening portion 332 of the opening groove can accommodate the second buckle portion 132 to enter. After rotation, the second buckle portion 132 cooperates with the step portion 331, so as to buckle the tank body 100 and the chassis 300.

[0085] It can be understood that the hook structure can be of other shapes, and there can also be other buckling methods between the first fixing part 130 and the second fixing part 330 that can connect the tank body 100 and the chassis 300. Of course, in some other embodiments, the first fixing part 130 and the second fixing part 330 can also be connected in cooperation by other means, such as by threaded connection, or by connecting with fasteners such as screws, etc.

[0086] In another embodiment, please refer to Figure 4B , the first fixing part 130 can also be arranged on the outer surface of the side wall 110 of the tank body, and the second fixing part 330 is arranged on the side of the limiting part 400 of the chassis facing the side wall 110 of the tank body, so that the first fixing part 130 and the second fixing part 330 cooperate with each other to connect the tank body 100 and the chassis 300.

[0087] In yet another embodiment, please refer to Figure 4C , the first fixing part 130 can also be arranged on the inner surface of the side wall 110 of the tank body, and the second fixing part 330 is arranged on the side of the protruding part 320 of the chassis facing the side wall 110 of the tank body, so that the first fixing part 130 and the second fixing part 330 cooperate with each other to connect the tank body 100 and the chassis 300.

[0088] The above humidifying tank optimizes the size of the sealing ring 200, so that when projected along the direction perpendicular to the axis of the side wall 110, at least part of the positive projections of the limiting part 400 and the sealing member 200 on the same projection plane coincide, so as not to block the water level height in the humidifying tank 10, and can solve the problem that the sealing ring 200 blocks the water level height in the humidifying tank, realizing the low water level recognition of the breathing assistance device; at the same time, by arranging the first fixing part 130 at the opening end of the tank body 100 and the second fixing part 330 on the chassis 300, the first fixing part 130 and the second fixing part 330 can be connected in cooperation with each other to ensure the firm connection between the tank body 100 and the chassis 300, and it is also convenient for disassembly and assembly.

[0089] An embodiment of a breathing assistance device in the present application:

[0090] In some embodiments, please refer to Figure 6, the breathing assistance device 1 is an oxygen therapy device for heating and humidifying the gas delivered to the user, including a humidifying tank 10 and a breathing assistance device main body. Among them, the breathing assistance device main body includes a housing 20, a water level identification module 30, and a heating module 40. It should be noted that the humidifying tank 10 of the breathing assistance device 1 provided in this embodiment has the same structure as the humidifying tank 10 provided in the above embodiment. The size of the sealing ring 200 is optimized so that when projected in the direction perpendicular to the axial direction of the side peripheral wall 110, the limiting portion 400 and the sealing member 200 at least partially overlap in the positive projection on the same projection plane, preventing the sealing ring 200 from blocking the water level height in the humidifying tank 10. The specific structure of the humidifying tank 10 will not be described in detail in this embodiment.

[0091] In one embodiment, the bottom of the water level identification module 400 is higher than the top of the sealing member 200 in the axial direction of the humidifying tank 10, preventing the sealing ring 200 from blocking the detection of the water level in the humidifying tank 10 by the water level identification module 400 and realizing the low water level identification of the breathing assistance device 1.

[0092] In addition, the housing 20 can be a split housing or an integral housing. The main body can provide a removably placeable position for the humidifying tank 10 and can heat the humidifying tank 10 through the heating module 40. The heating module 40 is installed on the housing 20, can contact the bottom surface of the humidifying tank 10 and provide heat energy to the humidifying tank 10 by heat transfer, realizing the heating of the liquid in the humidifying tank 10 and enabling the liquid in the humidifying tank 10 to meet the corresponding heating and humidifying requirements. The specific structure and control method of the heating module 40 can adopt the existing technology and will not be specifically described in the embodiments of the present application.

[0093] In some embodiments, the water level identification module 30 is installed on the housing 20 and is located on one side close to the humidifying tank 10, and can directly contact the outer surface of the side peripheral wall of the humidifying tank 10 for identifying the water level in the humidifying tank 10. Among them, at least a part of the water level identification module 400 is adapted to the side peripheral wall of the humidifying tank 10 for directly and closely contacting the outer surface of the side peripheral wall of the humidifying tank 10. The above "adaptation" means having complementary shapes, or having the same or similar bending angles. For example, at least a part of the shape of the water level identification module 400 can be complementary to the side peripheral wall of the humidifying tank 10 to closely adhere to the outer surface of the side peripheral wall of the humidifying tank 10. Since the outer peripheral surface of the part of the humidifier unit adapted to the housing 100 is generally a cylindrical surface, in order to adapt to the water level detection of the humidifier unit, in a specific embodiment, the first side of the module panel 410 is arc-shaped and can be the same as the arc surface of the outer shape of most open water tanks on the market, and can fit very closely, thus being beneficial to improving the water level detection accuracy.

[0094] In some embodiments, the above water level identification module 400 may include a capacitive water level sensor, which adopts the capacitive measurement principle. Measuring the water level using the capacitive measurement principle is a prior art and will not be described in detail in the present invention. In the present invention, the water level identification module 400 with a radian is used in the breathing assistance device, which can be matched with the humidifying tank 10 and can achieve a high water level detection accuracy. At the same time, the bottom of the water level identification module 400 is higher than the top of the seal 200 in the axial direction of the humidifying tank 10, solving the technical problem that the sealing ring 200 blocks the water level height in the humidifying tank 10, making the water level identification module 400 on the breathing assistance device host unable to identify the lower water level inside the humidifying tank 10, and enabling the low water level identification of the breathing assistance device.

[0095] In summary, through the humidifying tank and the breathing assistance device provided by the embodiments of the present application, by optimizing the size of the sealing ring of the humidifying tank, when projected in the direction perpendicular to the axial direction of the side wall, at least part of the positive projection of the limiting part and the seal on the same projection plane coincides, solving the problem that the sealing ring blocks the water level height in the humidifying tank while ensuring the sealing performance, and realizing the low water level identification of the breathing assistance device. At the same time, by respectively arranging fixing parts on the chassis and the tank body of the humidifying tank, the firm connection between the chassis and the tank body is ensured, and it is also convenient for disassembly and assembly.

[0096] In the above embodiments, the descriptions of the respective embodiments have their own focuses. For the parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0097] The above has introduced in detail a humidifying tank and a breathing assistance device provided by the embodiments of the present application. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of the present application. Those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A humidifying jar, which is used to cooperate with the main body of a breathing assistance device to heat and humidify gas, and is characterized in that, Comprising: A tank body, the tank body includes a circumferentially closed side wall and a top surface connected to one end of the side wall, the other end of the side wall is an open end, and a first fixing part is arranged at the open end; the tank body is also provided with an inlet port for receiving gas and an outlet port for discharging humidified gas; A chassis, the chassis includes a second fixing part, the second fixing part is cooperatively connected with the first fixing part, so that the chassis is installed at the open end of the tank body and encloses an inner cavity with the tank body to accommodate liquid; And A seal, the seal is installed between the inner surface of the side wall of the tank body and the chassis, and is used to keep the tank body and the chassis sealed and connected; Wherein, a limiting part is arranged on the tank body or the chassis, and is used to cooperate with the main body of the breathing assistance device to install the humidifying tank; Projecting along the direction perpendicular to the axial direction of the side wall, at least part of the positive projection of the limiting part and the seal on the same projection plane coincides.

2. The humidifying can according to claim 1, characterized in that, Projecting along the direction perpendicular to the axial direction of the side wall, the length of the overlapping part of the positive projection of the limiting part and the seal on the same projection plane along the axial direction of the side wall is at least half of the thickness of the sealing ring along the axial direction of the side wall.

3. The humidifying tank according to claim 1, characterized in that, The limiting part is arranged at the open end of the tank body and extends radially outward along the outer surface of the side wall of the tank body.

4. The humidifying can according to claim 1, wherein The chassis includes a bottom plate part, and a limiting part is arranged on one side of the bottom plate part facing the open end of the tank body, and the limiting part surrounds the outer surface of the side wall of the tank body.

5. The humidifying tank according to claim 3 or 4, characterized in that, The limiting part is arranged continuously or discontinuously around the outer surface of the side wall of the tank body.

6. The humidifying tank according to claim 1, wherein, The chassis includes a bottom plate part and a protruding part, the protruding part is arranged on one side of the bottom plate part facing the inner cavity of the tank body, and when the chassis is cooperatively installed with the tank body, the protruding part is located in the inner cavity of the tank body; the seal is installed between the protruding part and the inner surface of the side wall of the tank body to keep the tank body and the chassis sealed and connected.

7. The humidifying can according to claim 6, characterized in that, Projecting along the direction perpendicular to the axial direction of the side wall, at least part of the positive projection of the limiting part and the protruding part on the same projection plane coincides.

8. The humidifying can according to claim 1, wherein A first interaction force is formed between the first fixing part and the second fixing part, and a second interaction force is formed by the seal between the tank body and the chassis, and the directions of the first interaction force and the second interaction force are different.

9. The humidifying tank according to claim 1, wherein, The first fixing part is arranged at the bottom of the open end of the tank body, the second fixing part is arranged on one side of the chassis facing the tank body, and the first fixing part and the second fixing part cooperate with each other to connect the tank body and the chassis.

10. The humidifying can according to claim 4, wherein The first fixing part is arranged on the outer surface of the side wall of the tank body, the second fixing part is arranged on one side of the limiting part of the chassis facing the side wall of the tank body, and the first fixing part and the second fixing part cooperate with each other to connect the tank body and the chassis.

11. The humidifying can according to claim 6, characterized in that, The first fixing part is arranged on the inner surface of the side peripheral wall of the tank body, and the second fixing part is arranged on one side of the protruding part of the chassis facing the side peripheral wall of the tank body. The first fixing part and the second fixing part cooperate with each other to connect the tank body and the chassis.

12. The humidifying can according to any one of claims 9-11, characterized in that, The first fixing part and the second fixing part are buckled with each other.

13. The humidifying can according to claim 12, characterized in that, The first fixing part is a hook structure, and the second fixing part includes an opening groove and a step part arranged in the opening groove. The opening part of the opening groove can accommodate the hook structure to enter, so that the hook structure is rotated to be buckled with the step part, and the hook structure and the step part cooperate with each other; Alternatively, the hook structure is rotated in the reverse direction to be separated from the step part, so that the hook structure exits from the opening part of the opening groove.

14. The humidifying can according to claim 1, wherein, The first fixing part is a hook structure arranged at the bottom of the opening end of the tank body. The hook structure is L-shaped, and the L-shaped hook structure includes a first hook part and a second hook part. The first hook part extends towards the chassis along the axial direction of the side peripheral wall, and the second hook part extends perpendicular to the first hook part; The second fixing part is arranged on the chassis and includes an opening groove and a step part arranged in the opening groove. The step part and the opening groove partially overlap in the projection along the axial direction of the side peripheral wall. The opening part of the opening groove can accommodate the second hook part to enter, and the second hook part is rotated to cooperate with the step part.

15. The humidifying can according to claim 14, wherein The second hook part extends perpendicular to the first hook part along the radial direction of the side peripheral wall, or the second hook part extends perpendicular to the first hook part along the circumferential direction of the side peripheral wall.

16. The humidifying tank according to any one of claims 9-11, characterized in that, The first fixing part and the second fixing part are connected by threads.

17. A breathing assistance device for heating and humidifying the gas delivered to a user, characterized in that, It includes a humidifying tank and a respiratory assistance device main body. Among them, The humidifying tank includes a tank body, a chassis and a sealing member, and is used to heat the liquid in the humidifying tank to heat and humidify the gas; among them, the tank body includes a side peripheral wall closed along the circumference and a top surface connected to one end of the side peripheral wall. The other end of the side peripheral wall is an opening end. The tank body is also provided with an inlet port for receiving gas and an outlet port for discharging humidified gas; the chassis is installed at the opening end of the tank body and encloses an inner cavity with the tank body to accommodate liquid; a limiting part is also arranged on the tank body or the chassis and is used to cooperate with the respiratory assistance device main body to install the humidifying tank; the sealing member is installed between the inner surface of the side peripheral wall of the tank body and the chassis and is used to keep the tank body and the chassis sealed and connected; The respiratory assistance device main body includes a heating module, a housing and a water level identification module. Among them, the heating module is installed in the housing and is located at the bottom of the humidifying tank and is used to provide heat energy to the humidifying tank to heat the liquid in the humidifying tank; the water level identification module is installed in the housing and is directly in contact with the outer surface of the side peripheral wall of the humidifying tank and is used to identify the water level in the humidifying tank; Among them, along the direction perpendicular to the axial direction of the side peripheral wall, the positive projections of the limiting part and the sealing member on the same projection plane at least partially overlap.

18. The breathing assistance device according to claim 17, characterized in that, The bottom of the water level identification module is higher than the top of the seal in the axial direction of the humidifying tank.

19. The breathing assistance device according to claim 17, characterized in that, A first fixing portion is provided at the open end of the humidifying tank, and the chassis of the humidifying tank includes a second fixing portion. The second fixing portion is cooperatively connected with the first fixing portion to mount the chassis on the open end of the tank body.

20. The breathing assistance device according to claim 19, characterized in that, The limiting portion is provided at the open end of the tank body and extends radially outward along the outer surface of the circumferential wall of the tank body.

21. The respiratory assistance device according to claim 19, wherein The chassis includes a bottom plate portion, and the limiting portion is provided on one side of the bottom plate portion facing the open end of the tank body. The limiting portion surrounds the outer surface of the circumferential wall of the tank body.

22. The breathing assistance device according to claim 20 or 21, characterized in that, The limiting portion is continuously or discontinuously provided around the outer surface of the circumferential wall of the tank body.

23. The breathing assistance device according to claim 19, characterized in that, The chassis includes a bottom plate portion and a protruding portion. The protruding portion is provided on one side of the bottom plate portion facing the inner cavity of the tank. When the chassis is cooperatively installed with the tank body, the protruding portion is located in the inner cavity of the tank. The seal is installed between the protruding portion and the inner surface of the circumferential wall of the tank body to keep the tank body and the chassis sealed and connected.

24. The respiratory assistance device according to claim 23, wherein, Projecting along the direction perpendicular to the axial direction of the circumferential wall, at least a part of the positive projections of the limiting portion and the protruding portion on the same projection plane coincide.

25. The respiratory assistance device according to claim 24, wherein The bottom of the water level identification module is higher than the top of the protruding portion in the axial direction of the humidifying tank.

26. The respiratory assistance device according to claim 19, characterized in that, A first interaction force is formed between the first fixing portion and the second fixing portion, and a second interaction force is formed by the seal between the tank body and the chassis. The directions of the first interaction force and the second interaction force are different.

27. The breathing assistance device according to claim 19, wherein, The first fixing portion is provided at the bottom of the open end of the tank body, and the second fixing portion is provided on one side of the chassis facing the tank body. The first fixing portion and the second fixing portion cooperate with each other to connect the tank body and the chassis.

28. The breathing assistance device according to claim 21, wherein, The first fixing portion is provided on the outer surface of the circumferential wall of the tank body, and the second fixing portion is provided on one side of the limiting portion of the chassis facing the circumferential wall of the tank body. The first fixing portion and the second fixing portion cooperate with each other to connect the tank body and the chassis.

29. The breathing assistance device according to claim 23, characterized in that, The first fixing portion is provided on the inner surface of the circumferential wall of the tank body, and the second fixing portion is provided on one side of the protruding portion of the chassis facing the circumferential wall of the tank body. The first fixing portion and the second fixing portion cooperate with each other to connect the tank body and the chassis.

30. The breathing assistance device according to any one of claims 27-29, characterized in that, The first fixing portion and the second fixing portion are buckled with each other.

31. The respiratory assistance device according to claim 30, wherein, The first fixing portion is a hook structure. The second fixing portion includes an opening groove and a step portion provided in the opening groove. The opening of the opening groove can accommodate the hook structure to enter, so that the hook structure is rotated and buckled with the step portion. The hook structure and the step portion cooperate with each other. Alternatively, the hook structure is rotated in the reverse direction to be separated from the step portion, so that the hook structure exits from the opening of the opening groove.

32. The breathing assistance device according to any one of claims 27-29, characterized in that, The first fixing portion and the second fixing portion are threadedly connected.

33. The breathing assistance device according to claim 17, wherein, The water level identification module includes a capacitance water level sensor.

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