A humidifier tank for a breathing machine

Abstract

The application discloses a ventilator humidification tank, which comprises a tank body and an internal chamber. The tank body is provided with an air flow inlet and an air flow outlet. The internal chamber is configured to be capable of containing humidification liquid and being capable of communicating with an external air path through the air flow inlet and the air flow outlet. The tank body comprises an insertion end and a holding end. The insertion end is capable of being inserted into the inside of a ventilator. The humidification tank further comprises an air inlet flow guide part having a first end and a second end. The first end is in sealed connection with the air flow inlet. The second end is in communication with the internal chamber. The air inlet flow guide part comprises a bent flow guide pipe having at least two bending angles, so that the first end and the second end are located on opposite sides. The bent flow guide pipe makes the flow path of the air flow longer and more tortuous before the air flow contacts the humidification liquid, thereby reducing the noise generated in the air flow process. The tortuous air path also lengthens the path of the sound wave transmission and has a good noise reduction effect. The bent flow guide pipe also lengthens the path of the liquid backflow to the air flow inlet, thereby reducing the backflow risk.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of medical devices, and particularly relates to a breathing machine humidification tank. BACKGROUND

[0002] The breathing machine is generally provided with a blower, and the air outlet of the blower is in air interaction with a user or a patient through a breathing pipeline and a mask. The air after humidification can make the patient or the user feel more comfortable and is easier to receive, so the humidification assembly gradually becomes one of the indispensable components of the breathing machine.

[0003] The humidification assembly is usually a humidification tank arranged in the breathing machine, which is internally provided with an air duct assembly and a humidification liquid. The airflow blown by the blower enters the inside of the humidification tank through the air duct assembly, contacts the humidification liquid, so that the airflow becomes humid, and then the humidified air flows out from the outlet of the humidification tank to the user end to assist the user in breathing.

[0004] However, the humidification liquid in the humidification tank is often disturbed by the airflow, and the posture of the breathing machine changes, especially the miniaturized breathing machine, which is lighter and more prone to tipping, so that the humidification liquid is easily backflowed into the air duct assembly and further backflowed from the inlet of the air duct assembly to the blower, which makes the blower prone to short circuit, damage and other risks.

[0005] In addition, the airflow flowing in the air duct assembly produces a large amount of howling sound, and the airflow contacting the humidification liquid also disturbs the humidification liquid to produce noise, so that the noise of the breathing machine is large during use. Many users choose to wear the breathing machine when sleeping, so that the large noise of the breathing machine directly affects the sleep quality of the user and affects the use experience. SUMMARY

[0006] The present application provides a breathing machine humidification tank to solve at least one of the above technical problems.

[0007] The technical solution adopted by the present application is as follows:

[0008] A breathing machine humidification tank, comprising a tank body and an internal chamber, the tank body is provided with an airflow inlet and an airflow outlet, the internal chamber is configured to be capable of containing a humidification liquid and being capable of communicating with an external air path through the airflow inlet and the airflow outlet; the tank body comprises an insertion end and a holding end, the insertion end is capable of being inserted into the inside of a breathing machine main machine; the humidification tank further comprises an air inlet flow guide part having a first end and a second end, the first end is in sealed connection with the airflow inlet, and the second end communicates with the internal chamber; the air inlet flow guide part comprises a bent flow guide pipe having at least two bending angles, so that the first end and the second end are located on opposite sides.

[0009] The elbow-shaped flow guide pipe comprises a first section, a second section and a third section connected in sequence, the first section and the third section extend along a first direction, and the second section extends along the opposite direction of the first direction.

[0010] The first section, the second section and the third section are arranged side by side, and the third section is located higher than the first section and / or the second section.

[0011] In the first direction, the height of the bottom of the third section gradually decreases.

[0012] The bottom wall of the third section is provided with an anti-backflow protruding rib protruding upwards.

[0013] The cross-sectional area of the first section and the second section, and / or the second section and the third section changes by less than 10%.

[0014] In the first direction, the width of the third section gradually increases.

[0015] The air inlet flow guide part further comprises a flow straightening part arranged at the second end, the inlet of the flow straightening part is in communication with the outlet of the air inlet flow guide part, the outlet of the flow straightening part is in communication with the internal chamber, and the outlet of the flow straightening part is located lower than the inlet of the flow straightening part.

[0016] The outlet of the flow straightening part is located lower than the first section.

[0017] The outlet of the flow straightening part is configured to allow the airflow to enter the internal chamber in a direction different from the first direction.

[0018] The lower side of the outlet of the flow straightening part is provided with a liquid blocking plate, and the liquid blocking plate extends towards the first end below the air inlet flow guide part.

[0019] The liquid blocking plate extends downwardly and downwardly to form a flow guiding slope on the surface of the liquid blocking plate.

[0020] The flow straightening part is provided with a flow guiding rib, and the flow guiding rib extends in a curve to guide the fluid to flow towards the outlet of the flow straightening part.

[0021] The humidification tank further comprises an air outlet flow guide part having a third end and a fourth end, the third end being in communication with the internal chamber, and the fourth end being sealingly connected with the airflow outlet.

[0022] The humidification tank comprises a base and a cover capable of being buckled with each other, the airflow inlet and the airflow outlet are arranged on the cover and extend towards the internal chamber to form an airflow inlet mounting part and an airflow outlet mounting part, respectively.

[0023] The air inlet flow guide part and the air outlet flow guide part are constructed as an integral structure and can be inserted and fitted with the airflow inlet mounting part and the airflow outlet mounting part, respectively, as a whole.

[0024] The air inlet flow guide part or the air outlet flow guide part is provided with a positioning structure, and the cover is provided with a matching structure matched with the positioning structure.

[0025] As the technical scheme is adopted, the application has the following beneficial effects:

[0026] 1. When the humidification tank of the application is in use, the airflow blown by the air blowing part enters the internal cavity through the air inlet guide part and is in contact with the humidification liquid. The air inlet guide part includes a bent guide pipe with at least two bending angles, so that the flow path of the airflow before it is in contact with the humidification liquid is longer and more tortuous. On the one hand, the howling sound generated during the airflow flow is reduced, and the impact force of the airflow on the inner wall of the bent guide pipe is reduced, and the noise generated by the collision is reduced. On the other hand, the tortuous air path also lengthens the path of the sound wave transmission, making it difficult for internal noise to be transmitted to the outside, thus having a good noise reduction effect and improving the user experience.

[0027] In addition, the humidification liquid in the tank body can only flow back in the direction opposite to the direction of the airflow through the bent guide pipe. The bent guide pipe is bent and extended, which also lengthens the path of the liquid backflow to the air inlet, thereby reducing the risk of backflow. Even if part of the liquid flows back into the interior of the bent guide pipe from the second end, the liquid cannot flow directly to the first end under the blockage of the tortuous structure in the interior, thereby increasing the difficulty of liquid flow. Moreover, the internal cavity is a large volume of space for holding the humidification liquid. The cavity is single in number and simple in structure, and there is no complex separation structure. This not only saves production and processing costs, but also facilitates user use, greatly reducing the operation difficulty. The user only needs to fill the humidification liquid into the tank body before use.

[0028] 2. As a preferred embodiment of the application, the bent guide pipe includes a first section, a second section and a third section connected in sequence. The first section and the third section extend in the first direction, and the second section extends in the opposite direction of the first direction. When the airflow flows from the first section to the second section, the airflow needs to be turned by about 180° at this point because the extension directions of the two sections are opposite. Similarly, when the airflow enters the third section from the second section, the airflow also needs to be turned by about 180°. The sound is obviously reduced or eliminated when it is turned by a large angle. Therefore, by designing the extension directions of the three sections, the airflow completes two large-angle turns in the bent guide pipe, which has a good noise reduction effect. At the same time, although the extension directions of the three sections are not completely the same, the three sections are still parallel to each other, so that the three sections can be arranged side by side, thereby helping to reduce the volume of the bent guide pipe and save the space in the tank body, thereby helping to realize the miniaturization of the breathing machine, which is more convenient for home use.

[0029] 3. In a preferred embodiment of this application, the bottom wall of the third section is provided with an upwardly protruding anti-backflow rib. The anti-backflow rib in the third section creates a height difference, so that when the humidifying liquid flows backward along the third section, it needs to overcome the anti-backflow rib. However, due to the liquid's own gravity and the resistance of the forward-flowing airflow within the third section, the humidifying liquid has difficulty flowing upward over the anti-backflow rib. Therefore, the humidifying liquid flowing backward into the third section is blocked by the anti-backflow rib and cannot continue to flow backward into the second section, thus being blocked within the third section.

[0030] 4. In a preferred embodiment of this application, the air intake guide section further includes a rectifier section disposed at the second end of the air intake guide section. A baffle plate is provided on the lower side of the outlet of the rectifier section, extending towards the first end to the bottom of the air intake guide section. The baffle plate can block the outlet below the rectifier section in the vertical direction, reducing the risk of liquid splashing into the rectifier section and then entering the bent guide tube. At the same time, the baffle plate can also guide the direction of airflow when entering the internal chamber, thereby enabling the airflow to contact the humidifying liquid in a direction parallel or inclined to the liquid surface, reducing the collision force between the airflow and the humidifying liquid, reducing noise, and preventing the airflow from colliding with the humidifying liquid perpendicular to the liquid surface, thus avoiding disturbance of the liquid and generating noise.

[0031] 5. In a preferred embodiment of this application, the humidification tank further includes an air outlet guide section having a third end and a fourth end. The air inlet guide section and the air outlet guide section are constructed as an integral structure and can be inserted and fitted as a whole with the airflow inlet mounting section and the airflow outlet mounting section, respectively. The air inlet guide section and the air outlet guide section are an integral structure and are inserted and fitted with the tank body, thereby allowing them to be installed as a whole inside the tank body or removed from the tank body. This enables the air duct assembly inside the humidification tank to be installed or disassembled as an independent module, reducing processing and assembly difficulty and improving assembly efficiency. It also facilitates cleaning of the air inlet guide section and the air outlet guide section by the user. Furthermore, after the air inlet guide section and the air outlet guide section are removed, the inside of the tank body becomes a complete cavity, thereby increasing the volume of the internal chamber and allowing the user to add more humidifying liquid, improving humidification efficiency. Attached Figure Description

[0032] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0033] Figure 1 This is a schematic diagram of the internal structure of the humidification tank according to one embodiment of this application;

[0034] Figure 2 for Figure 1 Schematic diagram of the internal structure of the middle tank;

[0035] Figure 3 for Figure 1 Schematic diagram of the external structure of the middle tank;

[0036] Figure 4 This is an exploded view of the intake guide section according to one embodiment of this application;

[0037] Figure 5 This is a cross-sectional view of the air intake guide section according to one embodiment of this application;

[0038] Figure 6 This is a cross-sectional view of the air intake guide section according to another embodiment of this application;

[0039] Figure 7 This is a cross-sectional view of the air intake guide section according to another embodiment of this application;

[0040] Figure 8 This is a cross-sectional view of the humidification tank in the working position according to one embodiment of this application;

[0041] Figure 9 for Figure 8 Cross-sectional view of the intermediate humidification tank from another perspective;

[0042] Figure 10 This is a cross-sectional view of the humidification tank in one embodiment of this application, with it rotated forward 90°.

[0043] Figure 11 for Figure 10 Schematic diagram of the structure of the middle air intake guide section and the air outlet guide section;

[0044] Figure 12 This is a cross-sectional view of the humidification tank in one embodiment of this application, rotated 90° backward;

[0045] Figure 13 for Figure 12 Schematic diagram of the structure of the middle air intake guide section and the air outlet guide section;

[0046] Figure 14 This is a cross-sectional view of the humidification tank in one embodiment of this application, rotated 90° to the left.

[0047] Figure 15 for Figure 14 Schematic diagram of the structure of the middle air intake guide section and the air outlet guide section;

[0048] Figure 16 This is a cross-sectional view of the humidification tank in one embodiment of this application, rotated 90° to the right.

[0049] Figure 17 for Figure 16 Schematic diagram of the middle air intake guide section and the air outlet guide section.

[0050] wherein:

[0051] 1 tank body; 11 base; 12 cover body; 121 convex rib; 13 internal chamber; 14 sealing element; 15 heat conducting sheet; 16 air flow inlet; 17 air flow outlet;

[0052] 2 air inlet flow guide part; 21 first end; 22 second end; 23 bent flow guide pipe; 231 first section; 232 second section; 233 third section; 2331 anti-backflow convex rib; 234 arc-shaped transition section; 235 partition plate; 236 lower housing; 237 upper housing; 24 groove; 25 rectifier part; 26 liquid baffle; 27 flow guide rib;

[0053] 3 air outlet flow guide part; 31 third end; 32 fourth end;

[0054] 4 humidification liquid. DETAILED DESCRIPTION

[0055] In order to more clearly illustrate the overall concept of the present application, the following will be described in detail with reference to the accompanying drawings.

[0056] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without the specific details and other implementations can be employed. Therefore, the scope of the present application is not limited to the specific embodiments disclosed in the following description.

[0057] In addition, in the description of the present application, it should be understood that the terms "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0058] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, or it can be communicated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0059] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. In the description of the present specification, the description of the terms "embodiment", "example", "one embodiment", "exemplary" or "specific example" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples.

[0060] As shown in Figures 1 to 17 A humidification tank of a breathing machine, comprising a tank body 1 and an internal chamber 13, the tank body 1 is provided with an airflow inlet 16 and an airflow outlet 17, the internal chamber 13 is configured to be capable of containing humidification liquid 4 and capable of communicating with the external air circuit through the airflow inlet 16 and the airflow outlet 17; the tank body 1 comprises an insertion end and a holding end, the insertion end is capable of being inserted into the inside of the main machine of the breathing machine; the humidification tank further comprises an air inlet guide part 2 with a first end 21 and a second end 22, the first end 21 is in sealing connection with the airflow inlet 16, and the second end 22 is in communication with the internal chamber 13; the air inlet guide part 2 comprises a bent guide pipe 23 with at least two bending angles, so that the first end 21 and the second end 22 are located on opposite sides.

[0061] Specifically, as shown in Figure 4 , Figure 5 The first end 21 and the second end 22 are located on the left and right sides of the air inlet guide part 2 respectively, and also on the front and rear sides of the air inlet guide part 2 respectively.

[0062] It should be noted that the humidification liquid 4 is preferably water, so that the user can conveniently replace it, and before use, municipal tap water or pure water can be taken to the tank body, so that the airflow contacts the water during use to complete humidification. In order to save the use cost, the user can conveniently replace or supplement the humidification liquid 4.

[0063] Preferably, as shown in Figure 8 , Figure 9 The air inlet guide part 2 is located above the humidification liquid 4, the air inlet guide part 2 and the humidification liquid 4 are arranged in an up-down manner, so that the humidification liquid 4 is difficult to flow upward into the air inlet guide part 2 under the action of its own gravity, thereby reducing the risk of backflow from the airflow inlet 16.

[0064] As preferred, an opening is arranged on one side of the host of the breathing machine, the insertion end of the tank body 1 can extend into the interior of the host from the opening, and the holding end is located outside the host, so that the user can directly install the tank body 1 from one side of the host to the host, and directly remove the tank body 1 from the host by holding the holding end located outside, without the need to disassemble the host in whole, reducing the difficulty of installation and removal, and improving the use experience.

[0065] When the humidification tank of the present application is in use, the airflow blown by the air blowing member enters the air inlet guide part 2 through the first end 21, flows through the bent guide pipe 23, and then enters the internal cavity 13 through the second end 22 to contact and be moistened by the humidification liquid 4. The air inlet guide part 2 includes the bent guide pipe 23 having at least two bending angles, so that the flow path of the airflow before contacting the humidification liquid 4 is longer and more tortuous. On the one hand, the howling sound generated during the flow of the airflow is reduced, and the impact force of the airflow on the inner wall of the bent guide pipe 23 is reduced, and the noise generated by the impact is reduced. On the other hand, the tortuous air path also lengthens the path of the sound wave transmission, making it difficult for the internal noise to be transmitted to the outside, having a good noise reduction effect, and improving the use experience.

[0066] In addition, the humidification liquid 4 in the tank body 1 can only flow back to the airflow inlet 16 in the direction opposite to the flow direction of the airflow through the bent guide pipe 23, and the bent guide pipe 23 is bent and extended, also lengthening the path of the liquid backflow to the airflow inlet 16, reducing the risk of backflow. Even if part of the liquid backflows into the interior of the bent guide pipe 23 from the second end 22, the liquid cannot directly flow to the first end 21 under the blockage of the tortuous structure in the interior, increasing the difficulty of liquid flow. Moreover, the internal cavity 13 is a whole large volume space for containing the humidification liquid, the number of cavities is single and the structure is simple, without complex separation structure, which saves the production and processing cost and facilitates the user to use, greatly reducing the operation difficulty, and the user only needs to fill the humidification liquid 4 into the tank body 1 before use.

[0067] It should be noted that the structure of the bent guide pipe 23 is not limited in the present application, for example, the bent guide pipe 23 can extend in a Z shape as a whole to form a bending angle at each corner. Alternatively, the bent guide pipe extends in an S shape.

[0068] Specifically, in one preferred embodiment, as shown in Figure 4 the bent guide pipe 23 includes a first section 231, a second section 232 and a third section 233 connected in sequence, the first section 231 and the third section 233 extend along the first direction, and the second section 232 extends along the opposite direction of the first direction.

[0069] When the airflow flows from the first section 231 to the second section 232, the airflow needs to be turned by about 180° at this position because the extension directions of the two sections are opposite. Similarly, when the airflow flows from the second section 232 to the third section 233, the airflow also needs to be turned by about 180°. The sound is obviously reduced or eliminated when the airflow is turned by a large angle. Therefore, the extension directions of the three sections are designed to make the airflow complete two large-angle turns in the bending flow guide pipe 23, so that the noise reduction effect is better. Meanwhile, although the extension directions of the three sections are not completely the same, the three sections are still parallel to each other, so that the three sections can be arranged side by side, thereby helping to reduce the volume of the bending flow guide pipe 23, save the space in the tank body 1, and thus help to realize the miniaturization of the breathing machine, which is more convenient for family use.

[0070] Preferably, as shown in Figure 4 , the first section 231 and the second section 232, and the second section 232 and the third section 233 are both provided with arc-shaped transition sections 234. The airflow is guided by the arc-shaped transition sections 234 to smoothly complete the transition between the two sections, improve the airflow efficiency, prevent the airflow from being turbulent, and reduce the noise generated by the airflow colliding with the inner wall of the bending flow guide pipe 23.

[0071] Specifically, as shown in Figure 4 , the bending flow guide pipe 23 includes an upper shell 237 and a lower shell 236. The upper shell 237 and the lower shell 236 cooperatively enclose a channel for the airflow to pass through. The intake flow guide part 2 further includes an intake pipe fixed to one side of the bending flow guide pipe 23, and the intake pipe encloses at least part of the first section 231. The upper shell 237 and the lower shell 236 can be fixedly connected by means of adhesion, welding, clamping, screwing or the like. When the upper shell 237 and the lower shell 236 are connected in a detachable manner by means of clamping, screwing or the like, a sealing ring needs to be arranged at the connection position of the two shells to ensure the sealing of the airflow channel and prevent air leakage.

[0072] Further, as shown in Figure 4 , Figure 5 , Figure 11 , the first section 231, the second section 232 and the third section 233 are arranged side by side, and the third section 233 is higher than the first section 231 and / or the second section 232.

[0073] Specifically, as shown in Figure 11 , the first section 231, the second section 232 and the third section 233 are arranged side by side in a direction perpendicular to the first direction, and a partition plate 235 is arranged between adjacent two sections to reduce the space occupied by the bending flow guide pipe 23 and leave more space in the internal chamber 13 for containing the humidification liquid 4, thereby improving the humidification efficiency.

[0074] It can be understood that the air inlet 16 is in communication with the first section 231, and the air flow sequentially flows through the first section 231, the second section 232 and the third section 233 in the bent air guide pipe 23, and enters the internal chamber 13 from the second end 22. The third section 233 is located higher, and other air guide structures can be arranged at the second end 22, i.e. the outlet of the third section 233, to improve the contact effect of the air flow and the humidification liquid 4. In the use state, the air inlet guide part 2 is fixed above the internal chamber 13, and the humidification liquid 4 accumulates at the bottom of the internal chamber 13 under the action of gravity, below the air inlet guide part 2. Therefore, by increasing the position of the third section 233, the space between the humidification liquid 4 and the third section 233 can be increased under the premise that the liquid level of the humidification liquid 4 is constant, so that the air guide structure or the second end 22 still has a gap with the liquid level of the humidification liquid 4, so that the air flow contacts the surface of the humidification liquid 4 after entering the internal chamber 13, and does not enter below the liquid level of the humidification liquid 4, thereby reducing the probability of immersion in the humidification liquid 4, thereby avoiding the generation of noise caused by the air flow disturbing the humidification liquid 4.

[0075] In a specific example, the heights of the first section 231, the second section 232 and the third section 233 are gradually increased. In another specific example, the heights of the first section 231 and the second section 232 are the same, and the height of the third section 233 is higher than that of the first section and the second section. In yet another specific example, the first section 231 is lower than the second section 232, and the third section 233 has the same height as the second section 232.

[0076] In addition, the third section 233 can extend horizontally, so that the overall height of the third section 233 is higher than that of the second section 232 and / or the first section 231. In a preferred embodiment, as shown in Figures 5 to 7 the third section 233 gradually decreases in height from bottom to top along the first direction.

[0077] The third section 233 gradually decreases in height from bottom to top, which on the one hand increases the diameter of the outlet of the third section 233, reduces the pressure, appropriately reduces the flow rate of the air flow, and further makes the contact between the air flow and the humidification liquid 4 more gentle, reduces the generation of noise, and the increase in diameter can increase the air flow per unit time, so that more air flow enters the internal chamber 13 to contact the humidification liquid 4 to complete humidification, thereby improving the humidification efficiency. On the other hand, in the reverse flow path of the humidification liquid 4, the bottom of the third section 233 gradually increases, thereby increasing the difficulty of the reverse flow of the humidification liquid 4, increasing the resistance when the humidification liquid 4 flows in reverse, reducing the reverse flow rate, and improving the reverse flow prevention effect.

[0078] In this embodiment, since the bottom of the third section 233 is in a structure extending obliquely, the position of the third section 233 can be overall higher than the first section 231 and / or the second section 232, i.e. the lowest end of the bottom of the third section 233 is higher than the first section 231 and / or the second section 232. It is also possible to make part of the third section 233 higher than the first section 231 and / or the second section 232, for example, the lowest end of the third section 233 is level with or lower than the first section 231 and / or the second section 232, while the highest end of the third section 233 is higher than the first section 231 and / or the second section 232.

[0079] Preferably, as shown in Figure 6 , Figure 7 , the bottom wall of the third section 233 is provided with an anti-backflow protruding rib 2331 protruding upwards.

[0080] The anti-backflow protruding rib 2331 is arranged on the third section 233 to form a height difference on the third section 233, so that when the humidification liquid 4 flows back along the third section 233, it needs to pass over the anti-backflow protruding rib 2331, and under the action of the self-gravity of the liquid and the resistance of the airflow flowing forward in the third section 233, the humidification liquid 4 is difficult to flow upwards over the anti-backflow protruding rib 2331, so that the humidification liquid flowing back into the third section 233 is blocked by the anti-backflow protruding rib 2331 and cannot continue to flow back into the second section 232, thereby being blocked in the third section 233.

[0081] Specifically, as shown in Figure 6 , in a specific example, the bottom of the third section 233 is divided into two parts along the extension direction, wherein the wall thickness of the part close to the inlet of the third section 233 is thicker, and the wall thickness of the part close to the outlet of the third section 233 is thinner, so that a stepped surface is formed between the two parts to constitute the anti-backflow protruding rib 2331. Of course, in other examples, the bottom of the third section 233 can be divided into more parts, so that the wall thickness of each part gradually decreases along the extension direction of the third section 233, so that the third section 233 is arranged in a stepped manner, forming more levels of steps to improve the anti-backflow effect.

[0082] In another specific example, as shown in Figure 7 , part of the bottom of the third section 233 protrudes upwards to form an anti-backflow protruding rib 2331, and the anti-backflow protruding rib 2331 does not extend to the inlet of the third section 233.

[0083] As a preferred embodiment, the cross-sectional area of the first section 231 and the second section 232, and / or the second section 232 and the third section 233 varies less than 10%. In this embodiment, by limiting the cross-sectional area of the three sections, the overall air flow in the curved guide pipe 23 is more uniform, thereby ensuring that the flow rate of the air flow is more uniform, avoiding air flow turbulence and reducing noise.

[0084] Preferably, as shown in FIG. 3, the width of the third section 233 gradually increases in the first direction, so as to increase the outlet of the third section 233, increase the air flow into the internal chamber 13 per unit time, and improve the air supply efficiency and humidification efficiency. Figure 4

[0085] In a preferred embodiment of the present embodiment, as shown in FIG. 3, the air inlet guide part 2 further comprises a flow regulating part 25 arranged at the second end 22. The inlet of the flow regulating part 25 is in communication with the outlet of the air inlet guide part 2, the outlet of the flow regulating part 25 is in communication with the internal chamber 13, and the position of the outlet of the flow regulating part 25 is lower than the position of the inlet of the flow regulating part 25. Figures 4 to 7

[0086] The air flow from the outlet of the third section 233 passes through the flow regulating part 25 and enters the internal chamber 13 to contact the humidification liquid 4. The lower position of the outlet of the flow regulating part 25 makes the air flow outlet position closer to the liquid surface of the humidification liquid 4, thereby ensuring that more air flow can contact the humidification liquid 4 to complete humidification, improving the humidification effect and reducing the probability of air flow directly flowing out of the humidification tank without being humidified for use by the user.

[0087] Further, as shown in FIG. 3, the outlet position of the flow regulating part 25 is lower than the position of the first section 231, thereby increasing the flow space of the air flow after flowing out of the flow regulating part 25. The air flow can flow in the space between the bottom of the curved guide pipe 23 and the liquid surface of the humidification liquid 4, thereby reducing the flow resistance of the air flow and avoiding the air flow being blocked by the outer wall of the first section 231 after flowing out of the outlet of the flow regulating part 25, thereby reducing the flow efficiency. Figures 5 to 8

[0088] Specifically, as shown in FIG. 3, the curved guide pipe 23 extends downward at the end of the third section 233 to form the flow regulating part 25, so that the air flow in the third section 233 flows downward under the guidance of the flow regulating part 25 and enters the internal chamber 13 at a position closer to the liquid surface of the humidification liquid 4. When the humidification liquid 4 flows backward, it needs to flow upward to pass through the flow regulating part 25 and enter the third section 233, thereby further increasing the difficulty of the humidification liquid 4 flowing backward and improving the anti-backflow effect. Figure 5 Preferably, as shown in FIG. 3, the width of the third section 233 gradually increases in the first direction, so as to increase the outlet of the third section 233, increase the air flow into the internal chamber 13 per unit time, and improve the air supply efficiency and humidification efficiency.

[0089] Figures 5 to 8 ​​​​As shown, the outlet of the rectifying portion 25 is configured to make the airflow enter the internal chamber 13 in a direction different from the first direction. After the airflow in the third section 233 flows to the rectifying portion 25 in the first direction, the rectifying and guiding of the rectifying portion 25 are performed to make the airflow enter the internal chamber 13 in a direction different from the first direction, so that the airflow is turned again at the rectifying portion 25, further prolonging the airflow flow path and making the air path more tortuous, thereby further reducing the noise generation.

[0090] In a preferred embodiment, as shown in the drawings, Figures 5 to 7 the lower side of the outlet of the rectifying portion 25 is provided with a liquid blocking plate 26 extending to below the air inlet guide portion 2 towards the first end 21.

[0091] The liquid blocking plate 26 can block the outlet below the rectifying portion 25 in the vertical direction, reducing the risk of the wetting liquid 4 splashing into the rectifying portion 25 and then into the bent guide pipe 23. At the same time, the liquid blocking plate 26 can also guide the direction of the airflow entering the internal chamber 13, so that the airflow can contact the wetting liquid 4 in a direction parallel or inclined to the liquid surface, reducing the collision force between the airflow and the wetting liquid 4, reducing the noise, and avoiding the airflow colliding with the wetting liquid 4 vertically to the liquid surface, disturbing the liquid and generating noise.

[0092] Further, as shown in the drawings, Figures 5 to 8 the liquid blocking plate 26 extends downwardly inclined to form a guide slope on the surface of the liquid blocking plate 26.

[0093] The guide slope makes the airflow contact the wetting liquid 4 below in a downwardly inclined direction, not only reducing the noise generated by the violent collision between the airflow and the wetting liquid 4, but also making the airflow after being regularized by the rectifying portion 25 be able to blow out more uniformly when passing through the liquid blocking plate 26, so that the contact area with the wetting liquid 4 is larger, the airflow and the wetting liquid 4 can be fully contacted, the wetting efficiency is ensured, and the airflow humidity is improved. In addition, when the wetting liquid 4 below flows upwardly, it needs to overcome its own gravity to flow upwardly due to the presence of the guide slope, so the risk of reverse flow is reduced. And under the guidance of the guide slope, the wetting liquid flowing onto the liquid blocking plate 26 will also flow back to the lower side under the action of gravity, and will not accumulate on the liquid blocking plate 26.

[0094] Of course, the liquid blocking plate 26 can also extend horizontally to make the airflow enter the internal chamber 13 in a direction opposite to the first direction, which is not specifically limited here.

[0095] Preferably, as shown in the drawings, Figure 4 , Figure 6 , Figure 7As shown, the rectifying portion 25 is provided with a flow guide rib 27 which is curved to guide the fluid to flow towards the outlet of the rectifying portion 25. The flow guide rib 27 is protrusively curved towards the inlet of the rectifying portion 25, thereby forming a concave cambered structure on the side towards the outlet of the rectifying portion 25 to guide the airflow flowing thereto and the humidifying liquid 4 flowing therefrom to flow downwards into the internal chamber 13.

[0096] Specifically, as shown in Figure 6 、 Figure 7 the rectifying portion 25 is provided with a liquid blocking plate 26 below which the flow guide rib 27 is arranged on the upper side of the liquid blocking plate 26.

[0097] As a preferred embodiment of the present application, as shown in Figure 1 、 Figure 4 、 Figure 11 the humidifying tank further comprises an air outlet flow guide portion 3 having a third end 31 and a fourth end 32, the third end 31 being in communication with the internal chamber 13 and the fourth end 32 being sealingly connected with the airflow outlet 17.

[0098] After the airflow entering the internal chamber 13 is contacted and humidified by the humidifying liquid 4, it enters the air outlet flow guide portion 3 through the third end 31 and flows out from the fourth end 32 through the airflow outlet 17, and then flows through the pipeline to the face mask for use by the user. Specifically, as shown in Figure 4 、 Figure 11 the air outlet flow guide portion 3 is an air outlet pipe arranged on one side of the air inlet flow guide portion 2. The first section 231, the second section 232, the third section 233 of the bent flow guide pipe 23 and the air outlet pipe are arranged in sequence and side by side.

[0099] Further, as shown in Figure 1 、 Figure 3 the humidifying tank comprises a base 11 and a cover 12 which can be buckled to each other, the airflow inlet 16 and the airflow outlet 17 are arranged on the cover 12 and extend towards the internal chamber 13 to form an airflow inlet mounting portion and an airflow outlet mounting portion, respectively.

[0100] Preferably, as shown in Figure 1As shown, the cover 12 and the base 11 cooperate to form the internal chamber 13, the space in the cover 12 is used to install the air inlet guide part 2 and the air outlet guide part 3, and the space in the base 11 is used to hold the humidification liquid 4. It can be understood that the amount of the humidification liquid 4 in the internal chamber 13 is determined by the height of the base 11. When the user replenishes the humidification liquid 4 into the internal chamber 13, the cover 12 needs to be opened, at this time, the tank 1 is in an open state, the humidification liquid 4 is added into the base 11, and once the liquid level is higher than the height of the base 11, the excess liquid will overflow from the base 11, that is, in the normal working position (the humidification tank is placed in the working state), the maximum liquid level of the humidification liquid 4 in the internal chamber 13 is flush with the upper edge of the side wall of the base 11. Therefore, as preferred, the height of the cover 12 is greater than the height of the base 11, so that the second end 22 of the air inlet guide part 2 is not lower than the upper edge of the side wall of the base 11, on the one hand, it can provide sufficient installation space for the air inlet guide part 2 and the air outlet guide part 3 to flow out, avoiding that the two are immersed below the liquid level after the cover is closed. On the other hand, when the humidification tank is upside down and in an inverted state, the humidification liquid 4 is concentrated in the space of the cover 11, and the space has the air inlet guide part 2 and the air outlet guide part 3, which also occupies a certain space, so that the liquid level of the humidification liquid 4 rises. Therefore, the higher height can compensate for part of the space occupied by the air inlet guide part 2 and the air outlet guide part 3, so that the liquid level is lower than the second end 22 of the air inlet guide part 2, thereby preventing the humidification liquid 4 from flowing backward from the air inlet 16 to the air blowing part in the inverted state of the humidification tank.

[0101] Preferably, as shown in the drawings, Figure 1 The base 11 and the cover 12 are provided with a sealing element 14 therebetween to ensure the sealing of the inside of the tank 1 after the cover is closed, preventing the leakage of the humidification liquid 4 and the airflow.

[0102] Further, as shown in the drawings, Figure 1 , Figure 4 , Figure 11 The air inlet guide part 2 and the air outlet guide part 3 are configured as an integrated structure and can be respectively inserted and fitted with the air inlet mounting part and the air outlet mounting part as a whole.

[0103] The air inlet guide part 2 and the air outlet guide part 3 are an integrated structure and are inserted and fitted with the tank 1, so that the two can be installed or detached as a whole inside or from the tank 1, so that the air duct assembly in the humidification tank can be installed or detached as an independent module, reducing the processing and assembly difficulty and improving the assembly efficiency. At the same time, it is also convenient for the user to clean the air inlet guide part 2 and the air outlet guide part 3. At the same time, after the air inlet guide part 2 and the air outlet guide part 3 are detached, the inside of the tank 1 is a complete cavity, thereby increasing the volume of the internal chamber 13, so that the user can put more humidification liquid 4, improving the humidification efficiency.

[0104] Further, as shown in the drawings,Figure 1 , Figure 3 As shown, the airflow inlet 16 and the airflow outlet 17 are located on the same side of the tank body 1, which facilitates the connection of the pipeline and optimizes the pipeline layout.

[0105] Preferred, such as Figure 1 , Figure 4 , Figure 11 As shown, the air intake guide section 2 or the air outlet guide section 3 is provided with a positioning structure, and the cover 12 is provided with a matching structure that cooperates with the positioning structure.

[0106] When installing the air intake guide 2 and the air outlet guide 3, the positioning structure and the mating structure can be used as a reference to facilitate installation and prevent mistakes. This allows users to install the air intake guide 2 and the air outlet guide 3 onto the cover 12 in the correct posture, reducing assembly difficulty and improving ease of use.

[0107] Specifically, such as Figure 1 , Figure 11 As shown, the mating structure is a raised rib 121 provided on the cover 12, and the positioning structure is a groove 24 provided corresponding to the raised rib 121. The two have the same or similar shapes so that the user can directly know their correspondence. Of course, the positioning structure can also be a raised rib, and the corresponding mating structure can be a groove, or the positioning structure and the mating structure can be other structures, as long as they can cooperate to play a role in installing and positioning the air intake guide 2 and the air outlet guide 3. There is no limitation here.

[0108] Preferred, such as Figure 2 As shown, the base 11 is also provided with a heat-conducting plate 15, which is sealed and fixed to the base 11 to transfer the heat of the heating device to the internal chamber 13, so that the airflow in the internal chamber 13 is not only humidified but also heated, making the user's breathing more comfortable and improving the user experience.

[0109] The flow path of the airflow of the ventilator through the humidification tank of this application is as follows: the airflow blown out by the blower enters the first end 21 of the air intake guide section 2 through the airflow inlet 16, then enters the bent guide tube 23, and undergoes multiple turns inside the bent guide tube 23, flowing through the first section 231, the second section 232 and the third section 233 in sequence. At the second end 22, the airflow is rectified by the rectifier section 25 and guided by the baffle plate 26, and then flows downward into the internal chamber 13 to come into contact with the humidifying liquid 4 below and become moistened. The moistened airflow enters the air outlet guide section 3 through the third end 31 and flows out through the airflow outlet 17 from the fourth end 32, and flows through the breathing tubing and mask to the user end for use by the user.

[0110] The humidification tank of the present application can also make the humidification liquid 4 unable to flow to the first end 21, that is, the air flow outlet 16, when the humidification tank is rotated by no more than 90 degrees in any direction from the working orientation, through the design of the air flow path inside the air inlet guide part 2. Especially for small portable household respirators, even if the user turns over when sleeping or uses it improperly to make the machine body tilt, the humidification liquid 4 will not backflow, ensuring the safety and service life of the blower.

[0111] Specifically, taking the extension direction of the first section 231, that is, the above-mentioned first direction as the main view angle, as shown in the working orientation of the humidification tank, Figure 9 , the air inlet guide part 2 and the air outlet guide part 3 are located above the humidification liquid 4, the air flow inlet 16 and the air flow outlet 17 are towards the front side, the first end 21 of the air inlet guide part 2 is located at the front side of the tank body 1, and the second end 22 is located at the rear side of the tank body 1. At this time, the second end 22 of the air inlet guide part 2 is higher than the liquid level of the humidification liquid 4, and the humidification liquid 4 is at a lower position, having a smaller backflow risk.

[0112] When the humidification tank is rotated 90 degrees forward, as shown in Figure 10 , Figure 11 , the humidification liquid 4 submerges the air flow inlet 16 and the air flow outlet 17 at this time, and since the air flow inlet 16 and the first end 21 are sealingly connected, the humidification liquid 4 will not flow out of the air flow inlet 16, and in this state, the second end 22 is located above, above the liquid level of the humidification liquid 4, so the humidification liquid 4 cannot enter the air inlet guide part 2 through the second end 22, and cannot backflow. Even if part of the humidification liquid 4 enters the elbow guide pipe 23 from the second end 22 due to shaking, it will gather below, and in the state shown in Figure 11 , the elbow guide pipe 23 has multiple upwardly extending sections, so it will also block the liquid entering the inside of the elbow guide pipe 23, so that it cannot reach the first end.

[0113] When the humidification tank is rotated 90 degrees backward, as shown in Figure 12 , Figure 13 , the second section 232 and the third section 233 have a partition plate 235 therebetween, and in this state, the highest point of the partition plate 235 is higher than the liquid level of the humidification liquid 4. This arrangement can ensure that when the humidification tank is in this orientation, the humidification liquid 4 cannot enter the second section 232 and the first section 231, and even if the humidification tank is reversed to the working orientation from this orientation, the humidification liquid 4 cannot flow to the air flow inlet 16, further avoiding backflow of the humidification liquid 4 into the blower.

[0114] Preferably, as shown in Figure 11As shown, the first end 21 and the second end 22 of the air inlet guide part 2 are respectively located on the left and right sides of the air inlet guide part 2, so that when the humidification tank rotates left and right, the first end 21 and the second end 22 are at different heights.

[0115] As shown, when the humidification tank rotates 90° to the left, Figure 14 、 Figure 15 the second end 22 is partially submerged below the liquid surface, and the first end 21 is higher than the liquid surface, so the humidification liquid 4 cannot flow upward to the first end 21, and because the first section 231, the second section 232, and the third section 233 have a partition plate 235, at least part of the partition plate between the first section 231 and the second section 232 is above the liquid surface, which can also hinder the flow of humidification liquid 4 to the first end 21.

[0116] As shown, when the humidification tank rotates 90° to the right, Figure 16 、 Figure 17 the first end 21 is submerged below the liquid surface, and part of the second end 22 is higher than the liquid surface, so the humidification liquid 4 cannot directly flow out from the air inlet 16, and at least part of the partition plate between the third section 233 and the second section 232 is above the liquid surface, which blocks the humidification liquid 4 entering the second end, so the humidification liquid 4 cannot flow in the bent guide pipe 23 to the first end 21.

[0117] In the above embodiments, the humidification tank is rotated 90° in the four directions of front, back, left, and right, and the anti-backflow effect of the humidification tank in the four rotated states is illustrated. Of course, it can be understood that when the rotation angle of the humidification tank is less than 90°, the anti-backflow effect is also good. In addition, the humidification tank can also maintain good anti-backflow effect when rotated in other directions, which will not be listed here.

[0118] In addition, it should be noted that in extreme cases, the posture of the humidification tank of the present application can be artificially and intentionally adjusted, which may cause the humidification liquid inside to flow backward from the air inlet 16, for example, by colliding or rapidly and / or repeatedly rotating the humidification tank. However, in the actual use of the breathing machine, if the user finds that the breathing machine body is tilted, the posture should be adjusted in time to restore its normal working position. Therefore, the present application mainly solves the problem of backflow of humidification liquid in the common tilted or rotated state of the humidification tank in actual use, and cannot completely avoid the backflow of humidification liquid caused by intentionally swinging the humidification tank.

[0119] The places not mentioned in the present application can be realized by using or referring to the existing technology.

[0120] The various embodiments in the specification are described in progressive manner, and the same or similar parts between the various embodiments can be mutually referred to, and each embodiment focuses on the difference from other embodiments.

[0121] The above merely provides an example of the present application, and is not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. A humidifier tank of a breathing machine, comprising a tank body and an internal chamber, the tank body being provided with an air inflow port and an air outflow port, the internal chamber being configured to contain a humidification liquid and to communicate with an external air circuit through the air inflow port and the air outflow port; characterized in that, the tank body comprises an insertion end and a holding end, the insertion end being capable of being inserted into an internal part of a main machine of the breathing machine; the humidifier tank further comprises an air inflow guide part having a first end and a second end, the first end being in sealed connection with the air inflow port, the second end being in communication with the internal chamber; the air inflow guide part comprises a bent guide pipe having at least two bending angles, so that the first end and the second end are located on opposite sides; the bent guide pipe comprises a first section, a second section and a third section connected in sequence, the first section and the third section extending in a first direction, the second section extending in a reverse direction of the first direction. 2.The humidifier tank of the breathing machine according to claim 1, characterized in that, the first section, the second section and the third section are arranged side by side, and the third section is located higher than the first section and / or the second section. 3.The humidifier tank of the breathing machine according to claim 2, characterized in that, in the first direction, the height of the bottom of the third section gradually decreases. 4.The humidifier tank of the breathing machine according to claim 1 or 3, characterized in that, a bottom wall of the third section is provided with an anti-backflow protruding rib protruding upward. 5.The humidifier tank of the breathing machine according to claim 1, characterized in that, the cross-sectional area of the first section and the second section, and / or the second section and the third section, varies by less than 10%. 6.The humidifier tank of the breathing machine according to claim 1, characterized in that, in the first direction, the width of the third section gradually increases. 7.The humidifier tank of the breathing machine according to claim 1, characterized in that, the air inflow guide part further comprises a flow regulation part arranged at the second end, an inlet of the flow regulation part being in communication with an outlet of the air inflow guide part, an outlet of the flow regulation part being in communication with the internal chamber, and the outlet of the flow regulation part being located lower than the inlet of the flow regulation part. 8.The humidifier tank of the breathing machine according to claim 7, characterized in that, the outlet of the flow regulation part is located lower than the first section. 9.The humidifier tank of the breathing machine according to claim 7, characterized in that, the outlet of the flow regulation part is configured to enable air flow to enter the internal chamber in a direction different from the first direction. 10.The humidifier tank of the breathing machine according to claim 7, characterized in that, a liquid blocking plate is arranged at the lower side of the outlet of the flow regulation part, and the liquid blocking plate extends toward the first end to below the air inflow guide part. 11.The humidifier tank of the breathing machine according to claim 10, characterized in that, the liquid blocking plate extends downwardly and obliquely to form a flow guide slope on the surface of the liquid blocking plate. 12.The humidifier tank of the breathing machine according to claim 7, characterized in that, the flow regulation part is provided with a flow guide rib, the flow guide rib extending in a bent manner to guide fluid to flow toward the outlet of the flow regulation part.

13. The humidifier chamber of claim 1, wherein: the humidifier chamber further comprises an air outlet guide having a third end and a fourth end, the third end in communication with the internal chamber, and the fourth end in sealing connection with the air outlet.

14. The humidifier chamber of claim 13, wherein: the humidifier chamber comprises a base and a cover capable of being coupled to each other, the air inlet and the air outlet are provided on the cover and extend to the internal chamber to form an air inlet mounting portion and an air outlet mounting portion, respectively.

15. The humidifier chamber of claim 14, wherein: the air inlet guide and the air outlet guide are configured as an integral structure and are capable of being inserted into the air inlet mounting portion and the air outlet mounting portion, respectively, as a whole.

16. The humidifier chamber of claim 15, wherein: the air inlet guide or the air outlet guide is provided with a positioning structure, and the cover is provided with a cooperating structure cooperating with the positioning structure.

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