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, and the internal chamber can contain humidification liquid and is communicated with an external air path. The tank body comprises an insertion end and a holding end. The insertion end can be inserted into the inside of a ventilator main machine. The humidification tank further comprises an air inlet flow guide part with a first end and a second end. The first end is in sealed connection with the air flow inlet, and the second end is communicated with the internal chamber. The air inlet flow guide part comprises a flow guide pipe with a bending extension. The flow guide pipe comprises a first flow channel and a second flow channel. When the humidification tank is rotated by not more than 90 degrees in any direction from a working position, the humidification liquid cannot enter the first flow channel, so as to prevent the humidification liquid from flowing out of the air flow inlet. According to the application, the air path inside the air inlet flow guide part is designed to be bent and extended, so that the reverse flow path of the humidification liquid in the flow guide pipe is more tortuous. Even if the machine body is tilted, the humidification liquid will not flow back, so that the safety of the air blower is ensured.

Description

TECHNICAL FIELD

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

[0002] The breathing machine is generally provided with a blower, and an 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 essential 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] With the increasing demand of users, the breathing machine gradually enters the family, and the household small breathing machine is more and more loved by the majority of users. The small breathing machine has a smaller volume and weight, so the stability of the machine body is also reduced, and the machine is more likely to tip over. Especially when the user uses the breathing machine during sleep, the user turns over during sleep, which drives the breathing machine to tip over, so that the humidification tank also turns over. At this time, the humidification liquid is easy to flow back into the air duct assembly, and further flow back from the inlet of the air duct assembly to the blower, so that the blower is easy to short circuit, damage and other risks.

[0005] In addition, the design of the humidification tank needs to ensure that it can hold a sufficient amount of humidification liquid to ensure the humidification effect, and also needs to ensure that the airflow and the humidification liquid have a large enough contact area. SUMMARY

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

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

[0008] A ventilator humidification tank 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 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 air flow inlet, and the second end communicates with the internal chamber; the air inlet flow guide part comprises a flow guide pipe having a bent extension, the flow guide pipe comprises a first flow channel and a second flow channel in communication with each other, and the internal chamber and the flow guide pipe are configured such that when the humidification tank is rotated by not more than 90° in any direction from a working position, the humidification liquid cannot enter the first flow channel, so as to prevent the humidification liquid from flowing out of the air flow inlet.

[0009] The air flow inlet is arranged on the front side of the tank body, the first flow channel and the second flow channel both extend along the front-rear direction of the tank body, and when the humidification tank is rotated by not more than 90° forward from the working position, the second end is higher than the liquid level of the humidification liquid.

[0010] A partition plate is arranged in the flow guide pipe, the partition plate is located between the first flow channel and the second flow channel, and when the humidification tank is rotated by not more than 90° backward from the working position, the highest point of the partition plate is higher than the liquid level of the humidification liquid.

[0011] The air flow inlet is arranged on the front side of the tank body, a partition plate is arranged in the flow guide pipe, the partition plate is located between the first flow channel and the second flow channel, and when the humidification tank is rotated by not more than 90° in the left-right direction from the working position, at least part of the partition plate is higher than the liquid level of the humidification liquid.

[0012] The air inlet flow guide part further comprises a flow regulation part arranged on the second end, an inlet of the flow regulation part communicates with an outlet of the air inlet flow guide part, an outlet of the flow regulation part communicates with the internal chamber, and the position of the flow regulation part outlet is lower than the position of the flow regulation part inlet.

[0013] A liquid blocking plate is arranged below the flow regulation part outlet, and when the humidification tank is in the working position, the lowermost end of the liquid blocking plate is higher than the liquid level of the humidification liquid.

[0014] The liquid blocking plate extends downwardly and downwardly along the flow regulation part to below the air inlet flow guide part.

[0015] A flow guide rib is arranged in the flow regulation part, the flow guide rib is bent and extended to guide the flow of fluid towards the outlet of the flow regulation part.

[0016] The tank body comprises a bottom shell and an upper cover, the bottom shell and the upper cover cooperatively enclose the internal chamber, the air inlet flow guide part is arranged on the upper cover, and when the humidification tank is rotated by 180° from the working position, the first end or the second end is higher than the liquid level of the humidification liquid.

[0017] The humidification tank further comprises an air outlet flow guide part having a third end and a fourth end, the third end communicates with the internal chamber, and the fourth end is in sealed connection with the air flow outlet.

[0018] The first end is provided with an air inlet, and the fourth end is provided with a humidification outlet.

[0019] Due to the above technical solutions, the application has the following beneficial effects:

[0020] 1. The humidification tank of the application is provided with an air inlet guide part. The airflow blown by the air blower first enters the air inlet guide part, and then enters the internal cavity through the air duct inside the air inlet guide part to contact and humidify the humidification liquid. The airflow path inside the air inlet guide part is designed to bend and extend to form a first flow channel and a second flow channel, which further makes the reverse flow path of the humidification liquid in the guide pipe more tortuous. When the humidification tank is rotated by no more than 90 degrees from the working position to any direction, the humidification liquid cannot enter the first flow channel, and thus cannot flow to the first end, that is, the airflow outlet. Especially for small portable household respirators, even if the user turns over during sleep or uses it improperly to cause the machine to tip over, the humidification liquid will not backflow, ensuring the safety of the air blower and the service life.

[0021] The bending and extending of the guide pipe also make the flow path of the airflow before contacting the humidification liquid longer and more tortuous. On the one hand, it reduces the howling sound generated during the flow of the airflow, and reduces the impact force of the airflow on the inner wall of the guide pipe, reducing the noise generated by the collision. On the other hand, the tortuous air path also lengthens the path of the sound wave, making it difficult for internal noise to be transmitted to the outside, having good noise reduction and silencing effect, and improving the use experience.

[0022] 2. As a preferred embodiment of the application, the air inlet guide part further comprises a flow straightening part provided at the second end. The inlet of the flow straightening part communicates with the outlet of the air inlet guide part, the outlet of the flow straightening part communicates with the internal cavity of the humidification tank, and the position of the outlet of the flow straightening part is lower than that of the inlet of the flow straightening part. The airflow flowing out of the outlet of the second flow channel enters the internal cavity to contact the humidification liquid after being straightened by the flow straightening part. The lower outlet position of the flow straightening part makes the airflow outlet position closer to the liquid surface of the humidification liquid, thereby ensuring that more airflow can contact the humidification liquid to complete humidification, improving the humidification effect, and reducing the probability of the airflow flowing out of the humidification tank without being humidified for the user to use.

[0023] 3. In a preferred embodiment of this application, a baffle plate is provided below the outlet of the rectifier section. When the humidification tank is in the working position, the lowest point of the baffle plate is higher than the liquid surface of the humidified liquid. 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 into the guide pipe. At the same time, the baffle plate can also guide the direction of airflow when entering the internal chamber, so that the airflow can contact the humidified liquid in a direction parallel or inclined to the liquid surface, reducing the collision force between the airflow and the humidified liquid, reducing noise, and avoiding the airflow colliding with the humidified liquid perpendicular to the liquid surface, which would disturb the liquid and generate noise.

[0024] 4. In a preferred embodiment of this application, the tank includes a bottom shell and an upper shell, which together form an internal chamber. An air inlet guide is disposed on the upper shell. When the humidification tank is rotated 180° from its working position, the first end or the second end is higher than the liquid level of the humidified liquid. The humidified liquid inside the humidification tank has only one path to flow to the air inlet. It can only flow from the second end of the air inlet guide to the first end and then to the air inlet through the guide pipe. Therefore, when the humidification tank is rotated 180°, the humidified liquid accumulates in the space where the upper shell is located, and the first end or the second end is higher than the liquid level of the humidified liquid. This forces the humidified liquid to overcome its own gravity and flow upwards to reach the first end, thus greatly increasing the difficulty of backflow and improving the anti-backflow effect.

[0025] 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 third end communicates with the internal chamber, and the fourth end is sealed to the air outlet. The air inlet guide section and the air outlet guide section are inserted into the tank body, allowing them to be installed 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

[0026] 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:

[0027] Figure 1 This is a schematic diagram of the internal structure of the humidification tank according to one embodiment of this application;

[0028] Figure 2 for Figure 1 Schematic diagram of the internal structure of the middle tank;

[0029] Figure 3 For Figure 1 The external structure of the middle tank body is shown in the figure;

[0030] Figure 4 The structure of the air inlet flow guide part is shown in the figure;

[0031] Figure 5 The structure of the air inlet flow guide part is shown in the figure;

[0032] Figure 6 The structure of the air inlet flow guide part is shown in the figure;

[0033] Figure 7 The structure of the air inlet flow guide part is shown in the figure;

[0034] Figure 8 The structure of the air inlet flow guide part is shown in the figure;

[0035] Figure 9 For Figure 8 The structure of the air inlet flow guide part is shown in the figure;

[0036] Figure 10 The structure of the air inlet flow guide part is shown in the figure;

[0037] Figure 11 For Figure 10 The structure of the air inlet flow guide part is shown in the figure;

[0038] Figure 12 The structure of the air inlet flow guide part is shown in the figure;

[0039] Figure 13 For Figure 12 The structure of the air inlet flow guide part is shown in the figure;

[0040] Figure 14 The structure of the air inlet flow guide part is shown in the figure;

[0041] Figure 15 For Figure 14 The structure of the air inlet flow guide part is shown in the figure;

[0042] Figure 16 The structure of the air inlet flow guide part is shown in the figure;

[0043] Figure 17 For Figure 16 The structure of the air inlet flow guide part is shown in the figure.

[0044] wherein:

[0045] 1 tank body; 11 bottom shell; 12 upper cover; 121 convex rib; 13 internal chamber; 14 sealing element; 15 heat conducting sheet; 16 air flow inlet; 17 air flow outlet;

[0046] 2 air inlet flow guide part; 21 first end; 22 second end; 23 flow guide pipe; 231 first flow channel; 2311 first section; 2312 second section; 232 second flow channel; 2321 anti-backflow convex rib; 233 arc-shaped transition section; 234 partition plate; 235 lower shell; 236 upper shell; 24 groove; 25 flow rectifying part; 26 liquid blocking plate; 27 flow guide rib;

[0047] 3 air outlet flow guide part; 31 third end; 32 fourth end;

[0048] 4 humidification liquid. DETAILED DESCRIPTION

[0049] 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.

[0050] In the following description, a lot of specific details are set forth in order to provide a thorough understanding of the present application, however, the present application can also be implemented in other ways different from those described herein, therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below.

[0051] 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, therefore, it cannot be understood as a limitation to the present application.

[0052] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection, or communication; it can be direct connection, or indirect connection through 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 terms in the present application can be understood according to the specific circumstances.

[0053] 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 conjunction 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.

[0054] As shown in Figures 1 to 17 , a humidifier 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 humidifier 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 guide pipe 23 with a bending extension, the guide pipe 23 comprises a first flow channel 231 and a second flow channel 232 in communication with each other, the internal chamber 13 and the guide pipe 23 are configured such that when the humidifier tank is rotated by not more than 90° in any direction from the working position, the humidification liquid 4 cannot enter the first flow channel 231, so as to prevent the humidification liquid 4 from flowing out of the airflow inlet 16.

[0055] 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 are located on the front and rear sides of the air inlet guide part 2 respectively, so that when the humidifier tank is rotated by not more than 90° in any direction of front, rear, left and right, at least one of the first end 21 and the second end 22 is located above the liquid level of the humidification liquid 4.

[0056] 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 use cost, the user can conveniently replace or supplement the humidification liquid 4.

[0057] Preferably, as shown in Figure 8 , Figure 9As shown, in the working position, the air intake guide 2 is located above the humidifying liquid 4. The air intake guide 2 and the humidifying liquid 4 are arranged vertically, making it difficult for the humidifying liquid 4 to flow upward back into the air intake guide 2 under its own gravity, thereby reducing the risk of backflow from the airflow inlet 16.

[0058] Preferably, the ventilator main unit has an opening on one side, through which the insertion end of the canister 1 can be inserted into the main unit, while the gripping end is located outside the main unit. This makes it convenient for users to install the canister 1 directly onto the main unit from one side, and to remove the canister 1 directly from the main unit by gripping the external gripping end, without having to completely disassemble the main unit, thus reducing the difficulty of installation and disassembly and improving the user experience.

[0059] The humidification tank of this application is provided with an air inlet guide section 2. The airflow blown by the blower first enters the air inlet guide section 2, passes through the air duct inside the air inlet guide section 2, and then enters the internal chamber 13 to come into contact with and moisten the humidifying liquid 4. This application designs the airflow path of the guide pipe 23 inside the air inlet guide section 2, making it bend and extend to form a first flow channel 231 and a second flow channel 232. This makes the backflow path of the humidifying liquid 4 in the guide pipe 23 more tortuous, so that when the humidification tank is rotated no more than 90 degrees from the working position in any direction, the humidifying liquid 4 cannot enter the first flow channel 231 and thus cannot flow to the first end 21, that is, the airflow outlet 16. Especially for small-volume portable home ventilators, even if the user turns over in sleep or the machine is tilted due to improper use, the humidifying liquid 4 will not flow back, ensuring the safety and service life of the blower.

[0060] The bend and extension of the guide tube 23 makes the flow path of the airflow before contacting the humidifying liquid 4 longer and more tortuous. On the one hand, this reduces the whistling sound generated during the airflow process and reduces the impact force between the airflow and the inner wall of the guide tube 23, thus reducing the noise generated by the collision. On the other hand, the tortuous air path also lengthens the path of sound wave transmission, making it difficult for internal noise to be transmitted to the outside, resulting in a better noise reduction and sound attenuation effect and improving the user experience.

[0061] Specifically, such as Figure 9 As shown, taking the extension direction of the second flow channel 231 as the main viewpoint, in the working position of the humidification tank, as follows: Figure 9 As shown, the air intake guide section 2 is located above the humidifying liquid 4, with the air inlet 16 and air outlet 17 facing forward. The first end 21 of the air intake guide section 2 is located on the front side of the tank body 1, and the second end 22 is located on the rear side of the tank body 1. At this time, the second end 22 of the air intake guide section 2 is higher than the liquid surface of the humidifying liquid 4, and the humidifying liquid 4 is in a lower position, with a smaller risk of backflow.

[0062] The following takes the wetting tank rotating 90° in front, back, left and right directions as an example to illustrate the anti-backflow principle and effect of the wetting tank in the rotated state:

[0063] In an embodiment, the air inlet 16 is arranged on the front side of the tank body 1, the first flow channel 231 and the second flow channel 232 both extend in the front-back direction of the tank body 1, and when the wetting tank is rotated forward from the working position to not more than 90°, the second end 22 is higher than the liquid level of the wetting liquid 4.

[0064] Specifically, when the wetting tank is rotated forward by 90°, as shown in Figure 10 , Figure 11 , at this time, the wetting liquid 4 submerges the air inlet 16 and the air outlet 17, and since the air inlet 16 is in sealing connection with the first end 21, the wetting liquid 4 naturally cannot flow out of the air inlet 16, and in this state, the second end 22 is located above, above the liquid level of the wetting liquid 4, so the wetting liquid 4 cannot enter the air inlet guide part 2 through the second end 22, and backflow cannot be achieved. Even if part of the wetting liquid 4 enters the guide pipe 23 from the second end 22 due to shaking, it will gather below, and in the state shown in Figure 11 , the guide pipe 23 has multiple upward extending sections, so it will also block the liquid entering the guide pipe 23 from reaching the first end.

[0065] In an embodiment, when the wetting tank is rotated backward from the working position to not more than 90°, the first end 21 is higher than the liquid level of the wetting liquid 4.

[0066] Specifically, the guide pipe 23 is provided with a partition plate 234, and the partition plate 234 is located between the first flow channel 231 and the second flow channel 232. When the wetting tank is rotated backward by 90°, the highest point of the partition plate 234 is higher than the liquid level of the wetting liquid 4. This arrangement can ensure that when the wetting tank is in this position, the wetting liquid 4 cannot enter the first flow channel 231, and even if the wetting tank is reversed from this position to the working position, the wetting liquid 4 cannot flow to the air inlet 16, further avoiding backflow of the wetting liquid 4 into the air blower.

[0067] In an embodiment, the air inlet 16 is arranged on the front side of the tank body 1, the guide pipe 23 is provided with a partition plate 234, and the partition plate 234 is located between the first flow channel 231 and the second flow channel 232. When the wetting tank is rotated left or right from the working position to not more than 90°, at least part of the partition plate 234 is higher than the liquid level of the wetting liquid 4.

[0068] Specifically, when the wetting tank is rotated left by 90°, as shown in Figure 14 , Figure 15As shown, a portion of the second end 22 is submerged below the liquid surface, while the first end 21 is above the liquid surface. The humidifying liquid 4 cannot flow upward to the first end 21. In this state, at least a portion of the partition plate 234 between the first flow channel 231 and the second flow channel 232 is above the liquid surface, which can also prevent the humidifying liquid 4 from flowing to the first end 21.

[0069] When the humidifier is rotated 90° to the right, as follows Figure 16 , Figure 17 As shown, the first end 21 is submerged below the liquid surface, while a portion of the second end 22 is above the liquid surface. Because the airflow inlet 16 and the first end 21 are sealed together, the humidifying liquid 4 will not flow directly out of the airflow inlet 16. At least a portion of the partition plate 234 between the first flow channel 231 and the second flow channel 232 is above the liquid surface, blocking the humidifying liquid 4 entering the second end 22. Therefore, the humidifying liquid 4 cannot flow to the first end 21 within the guide pipe 23. In the above embodiment, taking the humidifying tank rotating 90 degrees in four directions (front, back, left, and right) as an example, the anti-backflow effect of the humidifying tank in four inverted states is illustrated. Of course, it is understood that when the rotation angle of the humidifying tank is less than 90°, it can also have a good anti-backflow effect. Furthermore, the humidifying tank can maintain a good anti-backflow effect when rotating in other directions, which will not be listed here.

[0070] Furthermore, it should be noted that in extreme cases, the orientation of the humidifier canister of this application can be intentionally adjusted, potentially causing the humidifying liquid inside to flow backward from the airflow inlet 16, for example, through impact or rapid and / or repeated rotation of the humidifier canister. However, during actual use of the ventilator, if the user finds that the ventilator has tipped over, its orientation should be adjusted promptly to restore it to its normal working position. Therefore, this application mainly addresses the problem of backflow of humidifying liquid when the humidifier canister is tilted or overturned in actual use, and cannot completely prevent backflow of humidifying liquid caused by intentionally shaking the humidifier canister.

[0071] As a preferred embodiment of this application, such as Figure 4 , Figure 11 As shown, the first flow channel 231 includes a first section 2311 and a second section 2312 arranged sequentially and in parallel. The second section 2312 is connected to the second flow channel 232 so that the guide pipe 23 can extend in a Z-shape as a whole, forming bends at the two corners. Alternatively, the guide pipe 23 can extend in an S-shape.

[0072] Specifically, in a preferred embodiment, such as Figure 4As shown, the first section 2311, the second section 2312 and the second flow channel 232 are connected in sequence, the first section 2311 and the second flow channel 232 extend along the first direction, and the second section 2312 extends along the reverse direction of the first direction.

[0073] When the airflow flows from the first section 2311 to the second section 2312, the airflow needs to be turned by about 180° at this position because the extension directions of the first section 2311 and the second section 2312 are opposite. Similarly, when the airflow enters the second flow channel 232 from the second section 2312, the airflow also needs to be turned by about 180°. The sound will be obviously reduced or eliminated when it is turned by a large angle. Therefore, by designing the extension directions of the three sections of the air flow channel, the airflow can be turned by a large angle twice in the flow guide pipe 23, which has a good noise reduction effect. Meanwhile, although the extension directions of the three sections of the air flow channel are not completely the same, they 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 flow guide pipe 23 and save the space in the tank body 1, thereby helping to realize the miniaturization of the breathing machine and make it more convenient for family use.

[0074] Preferably, as shown in Figure 4 As shown, the first section 2311 and the second section 2312, and the second section 2312 and the second flow channel 232 are both provided with arc-shaped transition sections 233, so that the airflow can be guided by the arc-shaped transition sections 233 to smoothly complete the transition between the two sections of the air flow channel, 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 flow guide pipe 23.

[0075] Specifically, as shown in Figure 4 As shown, the flow guide pipe 23 includes an upper shell 236 and a lower shell 235, and the upper shell 236 and the lower shell 235 cooperate to form a channel for the airflow to pass through. The air inlet flow guide part 2 further includes an air inlet pipe fixed to one side of the flow guide pipe 23, and the air inlet pipe surrounds at least part of the region of the first section 2311. The upper shell 236 and the lower shell 235 can be fixedly connected by pasting, welding or clamping, screwing or the like. When they are connected in a detachable manner by 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.

[0076] Further, as shown in Figure 4 , Figure 5 , Figure 11 As shown, the first flow channel 231 and the second flow channel 232 are arranged side by side, and the position of part of the region of the second flow channel 232 is higher than that of the first flow channel 231.

[0077] Specifically, as shown in Figure 11As shown, the first flow channel 231 and the second flow channel 232 are arranged side by side in a direction perpendicular to the first direction, and a partition plate 234 is arranged between the two flow channels to reduce the space occupied by the flow guide 23, leaving more space in the internal chamber 13 for holding the humidification liquid 4, thereby improving the humidification efficiency.

[0078] By increasing the position of the second flow channel 232, the space between the two can be increased under the premise that the liquid level of the humidification liquid 4 is constant, thereby facilitating the arrangement of the flow guide structure. The flow guide structure or the second end 22 still has a gap with the liquid level of the humidification liquid 4, so that after the airflow is introduced into the internal chamber 13, it is in contact with the surface of the humidification liquid 4, and will not be introduced below the liquid level of the humidification liquid 4, reducing the probability of immersion in the humidification liquid 4, thereby avoiding the generation of noise due to the disturbance of the airflow to the humidification liquid 4.

[0079] Preferably, as shown in Figure 6 , Figure 7 , the bottom wall of the second flow channel 232 is provided with an anti-backflow protruding rib 2321 protruding upward.

[0080] The anti-backflow protruding rib 2321 is arranged on the second flow channel 232 to form a height difference in the second flow channel 232, so that when the humidification liquid 4 flows backward along the second flow channel 232, it needs to pass over the anti-backflow protruding rib 2321. Under the action of the self-gravity of the liquid and the resistance of the forward-flowing airflow in the second flow channel, it is difficult for the humidification liquid 4 to flow upward over the anti-backflow protruding rib 2321, so that the humidification liquid 4 that flows backward into the second flow channel 232 is blocked by the anti-backflow protruding rib 2321 and cannot continue to flow backward into the first flow channel 231, thereby being blocked in the second flow channel 232.

[0081] Specifically, as shown in Figure 6 , in a specific example, the bottom of the second flow channel 232 is divided into two parts along the extension direction, wherein the wall thickness of the part near the inlet of the second flow channel 232 is thicker, and the wall thickness of the part near the outlet of the second flow channel 232 is thinner, so that a stepped surface is formed between the two parts to constitute the anti-backflow protruding rib 2321. Of course, in other examples, the bottom of the second flow channel 232 can be divided into more parts, so that the wall thickness of each part gradually decreases along the extension direction of the second flow channel 232, thereby arranging the second flow channel 232 in a stepped manner to form more levels of steps and improve the anti-backflow effect.

[0082] In another specific example, as shown in Figure 7 , part of the bottom of the second flow channel 232 protrudes upward to form an anti-backflow protruding rib 2321, and the anti-backflow protruding rib 2321 does not extend to the inlet of the second flow channel 232.

[0083] As a preferred embodiment, the cross-sectional area of the first flow channel 231 and the second flow channel 232 changes less than 10%. In this embodiment, by limiting the cross-sectional area change of the two flow channels, the overall air flow in the flow 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 generation. As shown in FIG. 1, the air flow guide part 2 includes a flow guide pipe 23, a first flow channel 231 and a second flow channel 232.

[0084] As shown in FIG. 1, the air flow guide part 2 includes a flow guide pipe 23, a first flow channel 231 and a second flow channel 232. Figure 4 As shown in FIG. 1, the air flow guide part 2 includes a flow guide pipe 23, a first flow channel 231 and a second flow channel 232. As shown in FIG. 1, the air flow guide part 2 includes a flow guide pipe 23, a first flow channel 231 and a second flow channel 232.

[0085] As shown in FIG. 1, the air flow guide part 2 includes a flow guide pipe 23, a first flow channel 231 and a second flow channel 232. Figures 4 to 7 As shown in FIG. 1, the air flow guide part 2 includes a flow guide pipe 23, a first flow channel 231 and a second flow channel 232. As shown in FIG. 1, the air flow guide part 2 includes a flow guide pipe 23, a first flow channel 231 and a second flow channel 232.

[0086] As shown in FIG. 1, the air flow guide part 2 includes a flow guide pipe 23, a first flow channel 231 and a second flow channel 232. As shown in FIG. 1, the air flow guide part 2 includes a flow guide pipe 23, a first flow channel 231 and a second flow channel 232.

[0087] As shown in FIG. 1, the air flow guide part 2 includes a flow guide pipe 23, a first flow channel 231 and a second flow channel 232. Figures 5 to 8 As shown in FIG. 1, the air flow guide part 2 includes a flow guide pipe 23, a first flow channel 231 and a second flow channel 232. As shown in FIG. 1, the air flow guide part 2 includes a flow guide pipe 23, a first flow channel 231 and a second flow channel 232.

[0088] As shown in FIG. 1, the air flow guide part 2 includes a flow guide pipe 23, a first flow channel 231 and a second flow channel 232. Figure 5 As shown in FIG. 1, the air flow guide part 2 includes a flow guide pipe 23, a first flow channel 231 and a second flow channel 232. As shown in FIG. 1, the air flow guide part 2 includes a flow guide pipe 23, a first flow channel 231 and a second flow channel 232.

[0089] As shown in FIG. 1, the air flow guide part 2 includes a flow guide pipe 23, a first flow channel 231 and a second flow channel 232. Figures 5 to 8As 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 second flow channel 232 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 airflow 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 towards the first end 21 below the air inlet guide portion 2.

[0091] The liquid blocking plate 26 can block the outlet below the rectifying portion 25 in the vertical direction, reducing the risk of the humidification liquid 4 splashing into the rectifying portion 25 and then into the 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 humidification liquid 4 in a direction parallel or inclined to the liquid surface, reducing the collision force between the airflow and the humidification liquid 4, reducing the noise, and avoiding the airflow colliding with the humidification 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 humidification liquid 4 below in a downwardly inclined direction, not only reducing the noise generated by the violent collision between the airflow and the humidification liquid 4, but also making the airflow after being regularized by the rectifying portion 25 be able to blow out more uniformly through the liquid blocking plate 26, having a larger contact area with the humidification liquid 4, so that the airflow and the humidification liquid 4 can fully contact each other, ensuring the humidification efficiency and improving the airflow humidity. In addition, when the humidification 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 humidification 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 rectifier 25 is provided with a flow guide rib 27, which is bent to guide the fluid to flow towards the outlet of the rectifier 25. The flow guide rib 27 is bent protruding towards the inlet of the rectifier 25, thereby forming a concave arc surface structure on the side towards the outlet of the rectifier 25, which guides the airflow flowing thereto and the humidification liquid 4 flowing therefrom to flow downwards into the internal chamber 13.

[0096] Specifically, as shown in Figure 6 、 Figure 7 , the rectifier 25 is provided with a liquid baffle 26 below, and the flow guide rib 27 is arranged on the upper side of the liquid baffle 26.

[0097] In a preferred embodiment, the canister 1 comprises a bottom shell 11 and an upper cover 12, which cooperatively define the internal chamber 13, and the air inlet guide 2 is arranged on the upper cover 12. When the humidification canister is rotated to 180° from the working position, the first end 21 or the second end 22 is higher than the liquid level of the humidification liquid 4.

[0098] The path of the humidification liquid 4 in the humidification canister to the air inlet 16 is unique, and can only flow through the flow guide pipe 23 from the second end 22 to the first end 21 of the air inlet guide 2 to the air inlet 16. Therefore, when the humidification canister is turned over by 180°, the humidification liquid 4 accumulates in the space where the upper cover 12 is located, and the first end 21 or the second end 22 is higher than the liquid level of the humidification liquid 4, so that the humidification liquid 4 needs to overcome its own gravity to flow upwards to the first end 21, thereby greatly increasing the difficulty of backflow and improving the anti-backflow effect.

[0099] For example, when the first end 21 is located above the liquid level of the humidification liquid 4, the humidification liquid 4 can enter the flow guide pipe 23 through the second end 22, but cannot flow upwards to the first end 21. When the second end 22 is located above the liquid level of the humidification liquid 4, the liquid level of the humidification liquid 4 is lower than the opening of the second end 22, so it cannot enter the flow guide pipe 23.

[0100] As a preferred embodiment of the present application, as shown in Figure 1 、 Figure 4 、 Figure 11 , the humidification canister further comprises an air outlet guide 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 in sealing connection with the air outlet 17.

[0101] After the air flow entering the internal chamber 13 contacts and is humidified by the humidification liquid 4, it enters the air outlet guide 3 through the third end 31 and flows out from the fourth end 32 through the air outlet 17, and then flows through the pipeline to the face mask for use by the user. Specifically, as shown in Figure 4 、 Figure 11As shown, the air outlet guide part 3 is an air outlet pipe arranged at one side of the air inlet guide part 2. The first flow channel 231, the second flow channel 232 and the air outlet pipe are arranged side by side in sequence.

[0102] Further, as shown in Figure 1 , Figure 3 , the air inlet 16 and the air outlet 17 are arranged on the upper cover 12 and extend into the inner chamber 13 to form the air inlet mounting part and the air outlet mounting part respectively.

[0103] Preferably, as shown in Figure 1 , the upper cover 12 and the bottom shell 11 cooperate to form the inner chamber 13, the space in the upper cover 12 is used to mount the air inlet guide part 2 and the air outlet guide part 3, and the space in the bottom shell 11 is used to hold the humidification liquid 4. It can be understood that the amount of the humidification liquid 4 in the inner chamber 13 is determined by the height of the bottom shell 11. When the user replenishes the humidification liquid 4 into the inner chamber 13, the upper 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 bottom shell 11, and once the liquid level is higher than the height of the bottom shell 11, the excess liquid will overflow the bottom shell 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 inner chamber 13 is flush with the upper edge of the side wall of the bottom shell 11. Therefore, as a preferred, the height of the upper cover 12 is greater than the height of the bottom shell 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 bottom shell 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 they 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 upper cover 11, which has the air inlet guide part 2 and the air outlet guide part 3, and also occupies a certain space, so that the liquid level of the humidification liquid 4 rises. Therefore, the higher height can compensate for a 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 back to the air blowing part from the air inlet 16 in the inverted state.

[0104] Preferably, as shown in Figure 2 , a sealing member 14 is arranged between the bottom shell 11 and the upper cover 12 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 air flow.

[0105] Further, as shown in 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 inserted and fitted with the air inlet mounting part and the air outlet mounting part respectively as a whole.

[0106] The air inlet guide part 2 and the air outlet guide part 3 are in an integrated structure and are inserted and matched with the tank body 1, so that the two can be integrally installed in or detached from the tank body 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 body 1 is a complete cavity, thereby increasing the volume of the internal chamber 13, so that the user can put more humidification liquid 4, and improve the humidification efficiency.

[0107] Further, as shown in Figure 1 、 Figure 3 , the air inlet 16 and the air outlet 17 are located on the same side of the tank body 1, thereby facilitating the connection of the pipeline and optimizing the pipeline arrangement.

[0108] Preferably, as shown in Figure 1 、 Figure 4 、 Figure 11 , the air inlet guide part 2 or the air outlet guide part 3 is provided with a positioning structure, and the upper cover 12 is provided with a matching structure matched with the positioning structure.

[0109] When installing the air inlet guide part 2 and the air outlet guide part 3, the positioning structure and the matching structure can be used as a reference to facilitate installation and prevent mistakes, so that the user can install the air inlet guide part 2 and the air outlet guide part 3 to the upper cover 12 in the correct posture, reduce the assembly difficulty and improve the use convenience.

[0110] Specifically, as shown in Figure 1 、 Figure 11 , the matching structure is a protruding rib 121 provided on the upper cover 12, and the positioning structure is a groove 24 corresponding to the protruding rib 121, and the two have the same or similar shapes, so that the user can directly know the corresponding relationship between the two. Of course, the positioning structure can also be a protruding rib, and the corresponding matching structure is a groove, or the positioning structure and the matching structure are other structures, as long as they can cooperate to install and position the air inlet guide part 2 and the air outlet guide part 3. In this regard, no limitation is made.

[0111] Preferably, as shown in Figure 2 , the bottom shell 11 is further provided with a heat conduction sheet 15, and the heat conduction sheet 15 is sealingly fixed to the bottom shell 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 and temperature-increased, so that the user can breathe more comfortably and improve the use experience.

[0112] The flow path of the air flow of the ventilator when flowing through the humidification tank of the present application is as follows: the air flow blown by the air blower enters the first end 21 of the air inlet guide part 2 through the air flow inlet 16, then enters the guide pipe 23, and is turned inside the guide pipe 23 for multiple times, sequentially flows through the first flow channel 231 and the second flow channel 232, and is inclined downwardly into the internal cavity 13 through the rectification of the rectification part 25 and the guidance of the liquid blocking plate 26 at the second end 22 to contact and be humidified by the humidification liquid 4 below, the humidified air flow enters the air outlet guide part 3 through the third end 31, and flows out from the fourth end 32 through the air flow outlet 17, flows to the user end through the breathing pipeline and the mask, and is used by the user.

[0113] The places not described in the present application can be realized by using or referring to the existing technology.

[0114] Each of the embodiments in the present specification is described in a progressive manner, and the same and similar parts between the embodiments can be referred to each other, and each of the embodiments mainly describes the difference from other embodiments.

[0115] The above only describes the embodiments of the present application and is not intended to limit the present application. The present application can have various changes and modifications for those skilled in the art. Any modification, equivalent replacement, improvement, etc. 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 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 a breathing machine main 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, and the second end being in communication with the internal chamber; the air inflow guide part comprises a guide pipe having a bent extension, the guide pipe comprising a first flow channel and a second flow channel in communication with each other, the internal chamber and the guide pipe being configured such that when the humidifier tank is rotated by no more than 90° in any direction from a working orientation, the humidification liquid cannot enter the first flow channel to prevent the humidification liquid from flowing out of the air inflow port; the humidifier tank further comprises an air outflow 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 in sealed connection with the air outflow port. 2.The humidifier tank of a breathing machine according to claim 1, characterized in that, the air inflow port is arranged on the front side of the tank body, the first flow channel and the second flow channel both extend along the front-rear direction of the tank body, and when the humidifier tank is rotated by no more than 90° forward from the working orientation, the second end is higher than the liquid level of the humidification liquid. 3.The humidifier tank of a breathing machine according to claim 2, characterized in that, a partition plate is arranged in the guide pipe, the partition plate being located between the first flow channel and the second flow channel, and when the humidifier tank is rotated by no more than 90° backward from the working orientation, the highest point of the partition plate is higher than the liquid level of the humidification liquid. 4.The humidifier tank of a breathing machine according to claim 1, characterized in that, the air inflow port is arranged on the front side of the tank body, a partition plate is arranged in the guide pipe, the partition plate being located between the first flow channel and the second flow channel, and when the humidifier tank is rotated by no more than 90° in the left-right direction from the working orientation, at least part of the partition plate is higher than the liquid level of the humidification liquid. 5.The humidifier tank of a 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 position of the outlet of the flow regulation part being lower than the position of the inlet of the flow regulation part. 6.The humidifier tank of a breathing machine according to claim 5, characterized in that, a liquid blocking plate is arranged at the lower side of the outlet of the flow regulation part, and when the humidifier tank is in the working orientation, the lowermost end of the liquid blocking plate is higher than the liquid level of the humidification liquid. 7.The humidifier tank of a breathing machine according to claim 6, characterized in that, the liquid blocking plate extends downwardly along the flow regulation part to below the air inflow guide part. 8.The humidifier tank of a breathing machine according to claim 5, characterized in that, a flow guide rib is arranged in the flow regulation part, the flow guide rib being bent to guide the flow of fluid towards the outlet of the flow regulation part.

9. The humidifier tank of claim 1, wherein: the tank body comprises a bottom shell and an upper cover, the bottom shell and the upper cover cooperatively define the internal chamber, the air inlet guide is arranged on the upper cover, when the humidifier tank is rotated from the working position to 180°, the first end or the second end is higher than the liquid level of the humidification liquid.

10. The humidifier tank of claim 1, wherein: the first end is provided with an air inlet, the fourth end is provided with a humidification outlet, the air inlet and the humidification outlet are towards the same side, the air flow inlet and the air inlet are correspondingly arranged, and the air flow outlet and the humidification outlet are correspondingly arranged.

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