Water tank for breathing machine and breathing machine

Abstract

The breathing machine comprises a main machine and the water tank, the water tank comprises a box body and a flow guide part which are connected to the main machine, a containing cavity is formed in the box body, a first air inlet and a first air outlet are formed in the bottom wall and the top wall of the box body correspondingly, and the first air inlet is connected to an exhaust port of the main machine in a sealed mode; the flow guide part is provided with a flow guide channel, the flow guide channel comprises a main channel and at least two sub-channels formed by forking one end of the main channel, the main channel is provided with a second air inlet connected to the first air inlet, each sub-channel is provided with a second air outlet, and the second air outlets communicate with the containing cavity and communicate with the first air outlet through the containing cavity; the air flow is divided into at least two paths by the at least two sub-channels to flow into the accommodating cavity of the box body, and then flows out of the water tank from the first air outlet after flowing in the accommodating cavity for a period of time, so that the retention time of the air flow in the water tank can be prolonged, the air flow is in full contact with water in the water tank, and the humidifying effect can be effectively improved.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and particularly to a water tank for a ventilator and a ventilator. Background Art

[0002] A ventilator is a device that can replace, control, or change a person's normal physiological respiration, increase pulmonary ventilation volume, and improve respiratory function. It is used to continuously provide oxygen to a user through a set pressure to improve the hypoxia problem during the user's sleep.

[0003] To reduce the irritation of cold and dry gas to the respiratory mucosa, most ventilators are equipped with a water tank. By heating the water in the water tank, water vapor is generated, making the gas inhaled into the user's body warm and humid, which is beneficial to keeping the user's respiratory tract unobstructed and diluting thick phlegm in the respiratory tract for easy discharge. However, the internal space of the existing ventilator water tank is limited, and the distance between the air inlet and the air outlet is very close, resulting in a short gas flow path inside the water tank. As a result, the air entering the water tank from the air inlet is easily discharged from the air outlet without being fully heated and humidified inside the water tank, greatly reducing the humidification effect of the water tank. Summary of the Invention

[0004] Based on this, it is necessary to provide a water tank for a ventilator and a ventilator including the water tank that can solve the above problems for the problem that the gas flow path inside the existing ventilator water tank is short, resulting in the air entering the water tank being easily discharged from the air outlet without being fully heated and humidified inside the water tank, thereby greatly reducing the humidification effect of the water tank.

[0005] According to one aspect of the present application, a water tank for a ventilator is provided, including:

[0006] A box body having a receiving cavity therein, and a first air inlet and a first air outlet are respectively provided on the bottom wall and the top wall of the box body to communicate the inside and the outside of the receiving cavity;

[0007] A guiding member is disposed in the receiving cavity. The guiding member is provided with a guiding channel, and the guiding channel includes a main channel and at least two sub-channels bifurcated from one end of the main channel. A second air inlet is provided at one end of the main channel away from each sub-channel, and a second air outlet is provided at one end of each sub-channel away from the main channel. The second air inlet is connected to the first air inlet, and the second air outlet communicates with the receiving cavity and communicates with the first air outlet through the receiving cavity.

[0008] In one embodiment, the opening directions of all the second air outlets deviate from the first air outlet along a horizontal direction, and / or the opening directions of all the second air outlets are inclined downward along the vertical direction.

[0009] In one embodiment, the number of the sub-channels is two. In the direction from the main channel to the sub-channels, the distance between the two sub-channels gradually increases, and the second air outlets of each sub-channel are respectively opened diagonally at both ends of one side wall of the accommodating cavity.

[0010] In one embodiment, the guiding member encloses a cavity with an opening on one side. The opening of the cavity has an annular edge, and the annular edge is sealingly connected to the inner side of the top wall of the box body, so that the inner side of the top wall of the box body and the cavity together form a guiding cavity. A plurality of partition plates are arranged in the guiding cavity, and the plurality of partition plates form the guiding channel in the guiding cavity.

[0011] In one embodiment, the partition plate also forms an air outlet channel with the cavity wall of the guiding cavity. The first air outlet is opened on the top wall of the air outlet channel to communicate with the air outlet channel; the guiding member is provided with a first air passing port communicating with the air outlet channel, and the accommodating cavity communicates with the air outlet channel through the first air passing port.

[0012] In one embodiment, the plurality of partition plates include a first partition plate, a second partition plate and a third partition plate. The first partition plate and the second partition plate are arranged at intervals, and the third partition plate is in a "person" shape and is arranged between the first partition plate and the second partition plate, so that the first partition plate, the second partition plate and the third partition plate together form one main channel and two sub-channels; the first partition plate or the second partition plate forms the air outlet channel with the cavity wall of the cavity.

[0013] In one embodiment, the guiding member is further provided with at least one second air passing port communicating with the air outlet channel, and the second air passing port is arranged in a dislocation manner with the first air outlet.

[0014] In one embodiment, the main channel and / or the sub-channels extend in a curved manner.

[0015] According to another aspect of the present application, a ventilator is provided, which includes a main machine and the water tank as described in any one of the above solutions. The main machine has an exhaust port, and the first air inlet opened on the box body of the water tank is sealingly connected to the exhaust port.

[0016] In one embodiment, the box body of the water tank is detachably connected above or below the main machine, so that the water tank and the main machine are in an up-and-down assembly structure.

[0017] In one embodiment, the peripheral side walls of the box body are flush with the peripheral side walls of the main machine.

[0018] The above-mentioned water tank for a ventilator and the ventilator including the water tank, on the one hand, by arranging a flow guide member in the box body of the water tank and making the flow guide channel of the flow guide member include a main channel and at least two sub-channels bifurcated from one end of the main channel, so that after the air flow enters the box body from the first air inlet, it can immediately enter the main channel through the second air inlet, and then be divided into at least two paths by at least two sub-channels and flow to the accommodation cavity of the box body. Finally, after the air flow flows in the accommodation cavity for a period of time, it flows out of the water tank from the first air outlet. Therefore, the residence time of the air flow in the water tank can be prolonged, and the air flow can be fully contacted with the water in the water tank, so as to effectively improve the humidification effect; on the other hand, by arranging the box body above the main machine, the water tank and the main machine are installed in an up-and-down structure, and the spatial size of the box body in the horizontal direction is no longer limited by the structure of the main machine. Therefore, the internal volume of the box body can be increased, so that the contact area between the water and the air in the box body is increased, which is beneficial to the full contact between the water and the air flow, and thus is also beneficial to improving the humidification effect. Description of the Drawings

[0019] Figure 1 Exploded schematic diagram of a ventilator provided by an embodiment of the present application.

[0020] Figure 2 Exploded schematic diagram of the flow guide member installed on the box cover provided by an embodiment of the present application.

[0021] Figure 3 Schematic diagram of the flow guide member installed on the box cover provided by an embodiment of the present application.

[0022] Figure 4 Schematic diagram of the structure of the flow guide member provided by an embodiment of the present application.

[0023] Figure 5 Schematic diagram of the air flow direction in the water tank provided by an embodiment of the present application.

[0024] Description of the Reference Numerals:

[0025] 10. Ventilator; 100. Main machine; 101. Exhaust port; 200. Water tank; 210. Box body; 210a. Accommodation cavity; 210b. First air inlet; 210c. First air outlet; 211. Box main body; 212. Box cover; 220. Flow guide member; 221. Flow guide channel; 221a. Main channel; 221b. Sub-channel; 221c. Second air inlet; 221d. Second air outlet; 222. Cavity; 223. Ring-shaped edge; 224. Partition board; 224a. First partition board; 224b. Second partition board; 224c. Third partition board; 225. Air outlet channel; 225a. First air passing port; 225b. Second air passing port. Detailed Embodiments

[0026] To make the above objects, features, and advantages of the present application more apparent and understandable, the following provides a detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings. Many specific details are set forth in the following description to facilitate a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0027] In the description of the present application, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the accompanying drawings. These are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0028] In addition, if terms such as "first" and "second" appear, these terms are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0029] In the present application, unless otherwise clearly specified and limited, if terms such as "installation", "connection", "connection", "fixation", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0030] In this application, unless otherwise clearly defined and limited, if there is a description such as a first feature being "on" or "under" a second feature, its meaning can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is less than that of the second feature.

[0031] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are only for illustrative purposes and do not represent the only implementation.

[0032] An embodiment of the present application provides a water tank for a ventilator and a ventilator including the water tank. The ventilator is used to continuously provide oxygen to a user through a set pressure to improve the hypoxia problem of the patient during sleep; the water tank is used to hold water so that the heating device of the ventilator can heat the water to generate water vapor, making the gas inhaled into the user's body warm and humid.

[0033] The structures of the water tank and the ventilator in the present application will be described below. This embodiment is only used as an example and will not limit the technical scope of the present application. It can be understood that in other embodiments, the water tank of the present application is not limited to only being used in a ventilator, but can also be used in any device that needs to heat water to generate water vapor, which is not limited herein.

[0034] Refer to Figure 1 , Figure 1 , which shows the external schematic diagram of the ventilator 10 in an embodiment of the present application. The ventilator 10 provided in an embodiment of the present application includes a main unit 100 and a water tank 200. The main unit 100 is provided with a heating device for heating the water in the water tank 200 to generate water vapor. And there is also a blower (not shown in the figure) in the main unit 100. The blower is used to generate an air flow so that the air flow can flow into the water tank 200, mix with the water vapor generated in the water tank 200, and then the air is humidified and inhaled into the user's body.

[0035] Specifically, in one embodiment, as Figure 1As shown, the host 100 is a cubic structure with side walls on all four sides. The water tank 200 includes a box body 210, which correspondingly is also a cubic structure with side walls on all four sides. It is detachably connected to the host 100, and the box body 210 has a receiving cavity 210a, and water is contained in the receiving cavity 210a. The host 100 has an exhaust port 101. The bottom wall of the box body 210 is provided with a first air inlet 210b, and the top wall is provided with a first air outlet 210c. The first air inlet 210b is hermetically connected to the exhaust port 101. The air flow generated by the fan in the host 100 can directly enter the box body 210 through the first air inlet 210b after being discharged from the exhaust port 101, and then mix with the water vapor in the box body 210 and be discharged from the first air outlet 210c.

[0036] In a preferred embodiment, the box body 210 is detachably connected above the host 100, and the side walls on all four sides of the box body 210 are flush with or protrude from the side walls on all four sides of the host 100, so that the water tank 200 and the host 100 are assembled in an up-and-down structure. In this way, the spatial size of the box body 210 in the horizontal direction is no longer restricted by the structure of the host 100. Therefore, the internal volume of the box body 210 can be increased, so that there is more water in the box body 210 in contact with the air flow flowing into the box body 210, thereby increasing the contact area between the water and the air in the box body 210, which is beneficial to improving the humidification effect. Of course, it can be understood that the box body 210 can also be detachably connected below the host 100, as long as the box body 210 and the host 100 are assembled in an up-and-down structure, which is not limited here.

[0037] Figure 1 In the embodiment shown, the box body 210 includes a box main body 211 and a box cover 212. The upper end of the box main body 211 is open, and the box cover 212 is detachably connected to the box main body 211 by a snap connection and closes the upper end opening of the box main body 211. The side of the box cover 212 facing the box main body 211 and the inner surface of the box main body 211 together form the receiving cavity 210a. The first air inlet 210b is opened on the bottom wall of the box main body 211, and the first air outlet 210c is opened on the box cover 212. When the water in the box body 210 is exhausted, the box cover 212 can be opened to replenish water through the upper end opening of the box main body 211, and then the box cover 212 is covered again. Of course, the box body 210 can also be an integral structure, and water can also be replenished by opening a water replenishment port in the box body 210.

[0038] Furthermore, in addition to improving the humidification effect by increasing the volume of the box body 210 of the water tank 200, the humidification effect can also be enhanced by extending the flow path of the gas in the box body 210. Therefore, in a preferred embodiment, as Figure 2 and Figure 3As shown in the figure, the water tank 200 further includes a flow guide member 220 disposed in the box body 210. A flow guide channel 221 is formed in the flow guide member 220. The flow guide channel 221 includes a main channel 221a and at least two sub-channels 221b bifurcated from one end of the main channel 221a. In the illustrated embodiment, there are two sub-channels 221b. A second air inlet 221c is formed at one end of the main channel 221a away from each sub-channel 221b, and a second air outlet 221d is formed at one end of each sub-channel 221b away from the main channel 221a. The second air inlet 221c is connected to the first air inlet 210b of the box body 210, and the second air outlet 221d communicates with the accommodation cavity 210a and communicates with the first air outlet 210c through the accommodation cavity 210a.

[0039] Thus, it can be seen that after the air flow enters the box body 210 from the first air inlet 210b, it can immediately enter the main channel 221a through the second air inlet 221c, and then is divided into at least two paths by at least two sub-channels 221b and flows into the accommodation cavity 210a of the box body 210. Finally, the air flow flows in the accommodation cavity 210a for a period of time and then flows out of the water tank 200 from the first air outlet 210c. Therefore, the residence time of the air flow in the water tank 200 can be extended, and the humidification effect can also be effectively improved.

[0040] It can be understood that the number of sub-channels 221b, that is, the number of second air outlets 221d, is not limited to two, and can also be more, and there is no limitation here.

[0041] In terms of the specific structure of the flow guide member 220, as Figure 4 shown, the flow guide member 220 has a box-shaped structure, which encloses a cavity 222 with one side open. The opening of the cavity 222 has an annular edge 223. The annular edge 223 is hermetically connected to the inner side of the top wall of the box body 210 by means of a sealing ring or ultrasonic fusion, so that the inner side of the top wall of the box body 210 and the cavity 222 of the flow guide member 220 together form a flow guide cavity. A plurality of partition plates 224 are provided in the flow guide cavity, and the plurality of partition plates 224 form the flow guide channel 221 in the flow guide cavity.

[0042] More specifically, the plurality of partition plates 224 include a first partition plate 224a, a second partition plate 224b, and a third partition plate 224c. The first partition plate 224a and the second partition plate 224b are arranged at intervals. The third partition plate 224c is in a "person" shape and is disposed between the first partition plate 224a and the second partition plate 224b, so that the first partition plate 224a, the second partition plate 224b, and the third partition plate 224c together form a main channel 221a and two sub-channels 221b. In the direction of the main channel 221a pointing to the sub-channel 221b, the distance between the two sub-channels 221b gradually increases.

[0043] By designing the third partition plate 224c in a "human" shape, the entire diversion channel 221 can also be in a "human" shape. Therefore, the main channel 221a and / or each sub-channel 221b do not have a straight extension structure, but a curved extension structure, which is also beneficial to extending the flow time of the air flow in the box body 210.

[0044] In order to further improve the humidification effect, in some preferred embodiments, each second air outlet 221d is respectively opened diagonally at both ends of one side wall of the accommodation cavity 210a of the box body 210; on this basis, the opening directions of all the second air outlets 221d deviate from the first air outlet 210c along a horizontal direction (i.e., the X direction in the figure), and the opening directions of all the second air outlets 221d are inclined downward along the vertical direction (i.e., the Y direction in the figure).

[0045] Thus, as Figure 5 shown, when the fan in the main unit 100 is turned on, a negative pressure is generated in the main unit 100, and a positive pressure greater than the external air pressure is generated in the water tank 200. Under the pressure difference between the inside of the water tank 200 and the external environment air pressure, the air flow flowing out of the two sub-channels 221b can impact the side wall of the front accommodation cavity 210a, and then flow along the other several side walls of the box body 210 respectively, and finally be discharged from the first air outlet 210c. During this process, the air flow has a long flow path, enabling the air flow to fully contact the water surface, thereby efficiently increasing the humidity of the outlet air and further improving the humidification effect; and, since the flow velocity and flow rate of the air flow along the inner wall of the box body 210 are relatively high, it can also effectively reduce the condensation of water vapor on the inner wall surface of the box body 210.

[0046] It should be noted that the diversion member 220 is not limited to the structure shown in the embodiment in the figure, and can also be a tubular structure that divides into two or divides into multiple parts, as long as it has multiple sub-channels 221b and can improve the humidification effect.

[0047] Furthermore, on the basis of the above embodiments, in combination with Figures 2 to 4As shown, the partition 224 also forms an air outlet channel 225 with the cavity wall of the diversion cavity. Specifically in the figure, the second partition 224b forms the air outlet channel 225 with the cavity wall of the diversion cavity. The first air outlet 210c is opened on the top wall of the air outlet channel 225 to communicate with the air outlet channel 225. The bottom wall of the diversion member 220 is provided with a first air passing port 225a communicating with the air outlet channel 225. The accommodation cavity 210a communicates with the air outlet channel 225 through the first air passing port 225a. The above design enables the air flow to flow out from the second air outlet 221d through the sub-channel 221b and then enter the accommodation cavity 210a of the box body 210, flow along the wall surface of the box body 210 and then enter the air outlet channel 225 through the first air passing port 225a, and then flow out from the first air outlet 210c to the outside of the water tank 200. Of course, it can also be that the first partition 224a forms the air outlet channel 225 with the cavity wall of the diversion cavity, as long as the air outlet channel 225 communicates with the first air outlet 210c.

[0048] Just because of the above-mentioned structure design, under the blockage of the bottom wall of the diversion member 220, the air flow needs to enter the air outlet channel 225 through the first air passing port 225a before it can flow out from the first air outlet 210c to the outside of the water tank 200, rather than flowing out directly and smoothly to the outside of the water tank 200. Therefore, the residence time of the air flow in the box body 210 can be further extended.

[0049] It should be noted that although it is necessary to extend the residence time of the air flow in the box body 210, the air flow still needs to be discharged from the box body 210 through the first air outlet 210c to be inhaled by the user. If the number of the first air passing ports 225a is small, a large amount of air flow will gather in the box body 210 and it is not easy to be discharged from the first air outlet 210c. Therefore, it is necessary to achieve a balance between the air flow being finally discharged from the first air outlet 210c and the air flow being able to stay in the box body 210 for a long time.

[0050] To achieve this balance, in a better embodiment, as Figure 4 shown, the diversion member 220 is also provided with at least one second air passing port 225b communicating with the air outlet channel 225, and the second air passing port 225b is arranged in a dislocation manner with the first air outlet 210c. In the embodiment shown in the figure, there are multiple second air passing ports 225b, and each second air passing port 225b is arranged in a dislocation manner with the first air outlet 210c, so that the air flow can more easily enter the air outlet channel 225 through the multiple second air passing ports 225b. However, because the second air passing port 225b is arranged in a dislocation manner with the first air outlet 210c, the air flow cannot be discharged from the first air outlet 210c immediately after entering the air outlet channel 225, but needs to stay in the air outlet channel 225 for a longer time before it can be discharged from the first air outlet 210c. Therefore, it also helps to improve the humidification effect.

[0051] As can be seen, for the water tank 200 for the ventilator 10 and the ventilator 10 including the water tank 200 provided by the present application, by providing the flow guiding member 220, specifically designing the opening direction of the second air outlet 221d of the air flow channel in the flow guiding member 220, and by forming the air outlet channel 225 in the flow guiding member 220 and providing the second air passing port 225b which is arranged in a dislocation manner with respect to the first air outlet 210c on the flow guiding member 220, the area and time of contact between the air flow and the water surface in the box body 210 of the water tank 200 can be extended, thereby being beneficial to improving the humidifying effect of the water tank 200.

[0052] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0053] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A water tank for a ventilator, characterized in that: include: A box body (210), wherein the box body (210) has a containing cavity (210a) therein, and the bottom wall and the top wall of the box body (210) are respectively provided with a first air inlet (210b) and a first air outlet (210c) communicating with the inside of the containing cavity (210a) and the outside of the containing cavity (210a); A flow guide (220) is arranged in the accommodating cavity (210a), the flow guide (220) is provided with a flow guide channel (221), the flow guide channel (221) comprises a main channel (221a) and at least two sub-channels (221b) branched from one end of the main channel (221a), a second air inlet (221c) is provided at one end of the main channel (221a) away from each sub-channel (221b), and a second air outlet (221d) is provided at one end of each sub-channel (221b) away from the main channel (221a), the second air inlet (221c) is connected to the first air inlet (210b), and the second air outlet (221d) is connected to the accommodating cavity (210a) and is connected to the first air outlet (210c) through the accommodating cavity (210a).

2. The water tank according to claim 1, characterized in that: The opening directions of all the second air outlets (221d) are away from the first air outlet (210c) in a horizontal direction, and / or the opening directions of all the second air outlets (221d) are inclined downward in a vertical direction.

3. The water tank according to claim 1 or 2, characterized in that: The number of the sub-channels (221b) is two, and in the direction from the main channel (221a) to the sub-channels (221b), the distance between the two sub-channels (221b) gradually increases, and the second air outlet (221d) of each sub-channel (221b) opens diagonally toward the two ends of one side wall of the accommodating cavity (210a).

4. The water tank according to claim 1, characterized in that The flow guide member (220) is surrounded by a cavity (222) with an opening on one side, the opening of the cavity (222) has an annular edge (223), and the annular edge (223) is sealed to the inner side of the top wall of the box body (210), so that the inner side of the top wall of the box body (210) and the cavity (222) together form a flow guide cavity, and a plurality of partitions (224) are provided in the flow guide cavity, and the plurality of partitions (224) form the flow guide channel (221) in the flow guide cavity.

5. The water tank according to claim 4, characterized in that: The partition plate (224) also forms an air outlet channel (225) with the cavity wall of the guide cavity, and the first air outlet (210c) is opened on the top wall of the air outlet channel (225) to connect with the air outlet channel (225); the guide member (220) is provided with a first air port (225a) connected with the air outlet channel (225), and the accommodating cavity (210a) is connected with the air outlet channel (225) through the first air port (225a).

6. The water tank according to claim 5, characterized in that The plurality of partitions (224) include a first partition (224a), a second partition (224b) and a third partition (224c); the first partition (224a) and the second partition (224b) are spaced apart; the third partition (224c) is in a "human" shape and is disposed between the first partition (224a) and the second partition (224b), so that the first partition (224a), the second partition (224b) and the third partition (224c) together form one main channel (221a) and two sub-channels (221b); the first partition (224a) or the second partition (224b) and the cavity wall of the cavity (222) form the air outlet channel (225).

7. The water tank according to claim 5, characterized in that The flow guide (220) is further provided with at least one second air outlet (225b) connected to the air outlet channel (225), and the second air outlet (225b) is arranged in a staggered manner with the first air outlet (210c).

8. The water tank according to claim 1, characterized in that The main channel (221a) and / or the sub-channel (221b) extend in a curved manner.

9. A ventilator, characterized in that: The invention comprises a main unit (100) and a water tank (200) as claimed in any one of claims 1 to 8, the main unit (100) having an exhaust port 101, and a first air inlet (210b) provided on a box body (210) of the water tank (200) being sealed and connected to the exhaust port 101.

10. The ventilator according to claim 9, characterized in that: The box body (210) of the water tank (200) is detachably connected to the top or bottom of the main unit (100), so that the water tank (200) and the main unit (100) are in an up-and-down assembly structure.

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