Airflow generating device and breathing machine

Abstract

The invention relates to an airflow generating device and a breathing machine, the breathing machine comprises the airflow generating device, the airflow generating device comprises a shell and a fan, and the shell is internally provided with an inlet cavity, a fan cavity and an outlet cavity which are sequentially communicated in the airflow flowing direction; the fan is arranged in the fan cavity, a plurality of backflow holes are formed in the cavity wall, adjacent to the outlet cavity, of the fan cavity, and the backflow holes are configured to enable part of airflow in the outlet cavity to flow back into the fan cavity so as to reduce pneumatic noise generated by disordered airflow in the outlet cavity. Vibration noise generated by the fan is transmitted into the fan cavity from the outlet cavity, so that the vibration noise is lost. Thus, a good noise elimination effect can be achieved under the condition that porous sound absorption materials do not need to be selected, the cost is reduced, the overall size of the breathing machine is reduced, and meanwhile the use experience of a user can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and particularly to an air flow generating device 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. Specifically, when the ventilator is working properly, the fan blades in the air flow generating device rotate under the drive of the motor to continuously generate breathable air flow, which passes through the humidifier, breathing tube, and nasal mask and is delivered to the user. However, the high-speed rotation of the fan blades will generate relatively large vibration noise, and the air flow velocity at the fan outlet is large, which will also form a turbulent air flow. The turbulent air flow will also generate obvious aerodynamic noise. The noise spreading outward through the fan will seriously affect the sleep quality of the user, thus also affecting the user experience.

[0003] In the prior art, porous sound-absorbing materials are usually installed in the internal air duct to reduce the above-mentioned noise, but there are the following problems in installing porous sound-absorbing materials: on the one hand, the porous sound-absorbing materials will age after long-term use, generating many fine particles, which are carried into the user's lungs by the air flow, seriously endangering the user's physical health; on the other hand, the porous sound-absorbing materials are built into the air path, will accumulate dust, breed bacteria and viruses, seriously endangering the user's health; on the other hand, the porous sound-absorbing materials must reach a certain thickness to have a sound-absorbing effect, and the air path needs a large volume to achieve a sound-absorbing effect, so the overall volume of the ventilator is very large. Summary of the Invention

[0004] Based on this, the main purpose of the present application is to provide an air flow generating device and a ventilator including the air flow generating device, aiming to reduce the noise of the ventilator and at the same time reduce the overall volume of the ventilator without using porous sound-absorbing materials.

[0005] According to one aspect of the present application, an air flow generating device is provided, including:

[0006] A housing, having an inlet chamber, a fan chamber, and an outlet chamber that are sequentially connected along an air flow direction therein; the housing is provided with an air inlet and an air outlet, the air inlet is opened at a position of the housing corresponding to the inlet chamber and communicates with the inlet chamber, and the air outlet is opened at a position of the housing corresponding to the outlet chamber and communicates with the outlet chamber;

[0007] A fan, disposed in the fan chamber, the fan is used to accelerate the flow of air to generate an air flow, so that after the air flow enters the inlet chamber from the air inlet, it can sequentially pass through the fan chamber and the outlet chamber along the air flow direction and be discharged from the air outlet;

[0008] A plurality of return holes are formed in the chamber wall of the blower chamber adjacent to the outlet chamber. The return holes are configured to allow a part of the air flow in the outlet chamber to flow back into the blower chamber, so as to reduce the aerodynamic noise generated by the turbulent air flow in the outlet chamber, and to allow the vibration noise generated by the blower to propagate from the outlet chamber into the blower chamber, so as to attenuate the vibration noise.

[0009] In one embodiment, in the direction from the blower chamber to the outlet chamber, the return holes extend with equal or variable diameters.

[0010] In one embodiment, a plurality of partition plates are provided in the housing. The inlet chamber, the blower chamber and the outlet chamber are separated by the plurality of partition plates. Among them, the partition plate provided between the blower chamber and the outlet chamber is defined as the first partition plate, and the return holes are formed in the first partition plate and penetrate through the first partition plate.

[0011] In one embodiment, the first partition plate is provided with a blower mounting opening penetrating through opposite sides thereof. The blower has an air outlet pipe, the air outlet pipe has an air outlet, and the air outlet pipe is inserted into the blower mounting opening, and the air outlet faces the outlet chamber.

[0012] In one embodiment, the first partition plate is detachably provided in the housing.

[0013] In one embodiment, the partition plate provided between the inlet chamber and the blower chamber is defined as the second partition plate. The second partition plate is provided with a ventilation opening penetrating through opposite sides thereof. The inlet chamber and the blower chamber are communicated with each other through the ventilation opening.

[0014] In one embodiment, a wind resistance member is provided in the inlet chamber. The wind resistance member has an air flow channel penetrating through opposite ends thereof. A plurality of ribs are provided in the air flow channel, and the plurality of ribs divide the air flow channel into a plurality of air flow sub-channels.

[0015] In one embodiment, a third partition plate is provided in the housing. The third partition plate divides the inlet chamber into a first inlet chamber and a second inlet chamber. In the air flow direction, the second inlet chamber is located between the first inlet chamber and the blower chamber. The air inlet is formed in the side wall of the housing corresponding to the first inlet chamber, and the wind resistance member penetrates through the third partition plate.

[0016] In one embodiment, the housing includes an upper housing and a lower housing. The upper housing is detachably disposed over the lower housing. The inlet chamber, the blower chamber, and the outlet chamber are located in the upper housing and / or the lower housing.

[0017] According to another aspect of the present application, there is provided a ventilator including the air flow generating device as described in any of the above solutions.

[0018] For the above air flow generating device and ventilator, by providing a plurality of return holes in the chamber walls of the blower chamber and the outlet chamber, on the one hand, when the blower operates, a negative pressure is generated in the blower chamber, and a significant pressure difference is formed between the blower chamber and the outlet chamber. Most of the air flow in the outlet chamber flows out of the air flow generating device through the air outlet, and a small part of the air flow will flow towards the blower chamber through the return holes under the action of the pressure difference, thereby making the air flow in the outlet chamber smoother, and thus reducing the pneumatic noise generated by the turbulent air flow. On the other hand, the vibration noise generated by the blower in the outlet chamber will also propagate into the blower chamber through the return holes and finally be dissipated in the blower chamber. In this way, a good noise reduction effect can be achieved without the need to select porous sound-absorbing materials. While reducing costs and reducing the overall volume of the ventilator, the user experience can also be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic internal structure diagram of the air flow generating device provided by an embodiment of the present application.

[0020] Figure 2 It is an exploded view of the air flow generating device provided by an embodiment of the present application.

[0021] Figure 3 It is a cross-sectional view of the internal structure of the air flow generating device provided by an embodiment of the present application.

[0022] Figure 4 is Figure 1 an enlarged schematic view of area A in

[0023] Figure 5 is Figure 3 an enlarged schematic view of area B in

[0024] Description of the reference numerals:

[0025] 10. Airflow generating device; 100. Housing; 101. Inlet chamber; 101a. First inlet chamber; 101b. Second inlet chamber; 102. Fan chamber; 103. Outlet chamber; 104. Air inlet; 105. Air outlet; 106. Partition; 106a. First partition; 106b. Second partition; 106c. Third partition; 107. Fan mounting opening; 108. Venting opening; 109. Return hole; 110. Upper housing; 120. Lower housing; 130. Seal; 200. Fan; 201. Air outlet pipe; 202. Air outlet; 300. Air resistance member. Detailed implementation manner

[0026] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manner of the present application in conjunction with the accompanying drawings. Many specific details are set forth in the following description to fully understand 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 connotation 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 these terms "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 drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0028] In addition, if these terms "first" and "second" appear, these terms are only for descriptive purposes and cannot 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 of such features. 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 defined.

[0029] In this application, unless otherwise clearly specified and defined, if terms such as "installed", "connected", "linked", "fixed", etc. appear, these terms shall 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 defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] In this application, unless otherwise clearly specified and defined, 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 merely means that the first feature is at a higher level than the second feature in terms of horizontal height. 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 merely means that the first feature is at a lower level than the second feature in terms of horizontal height.

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

[0032] An embodiment of this application provides an air flow generating device and a ventilator including the air flow generating device. The ventilator is used to continuously provide oxygen to a user through a set pressure by using the air flow generating device, so as to improve the hypoxia problem of the patient during sleep.

[0033] This embodiment is only used as an example for illustration and will not limit the technical scope of this application. It can be understood that in other embodiments, the air flow generating device of this application is not limited to being only used in a ventilator and can also be used in any device that needs to generate air flow, which is not limited here.

[0034] A ventilator provided by an embodiment of the present application includes a main body (not shown in the figure) and a water tank (not shown in the figure). An air flow generating device 10 is provided inside the main body, and a heating device is provided on the main body. The heating device is used to heat the water in the water tank to generate water vapor. The air flow generating device 10 is used to generate an air flow so that the air flow can flow into the water tank, mix with the water vapor generated in the water tank, and then the air is humidified and inhaled by the user into the body, so that the gas inhaled by the user is warm and humid.

[0035] Referring to Figures 1 to 3 , Figure 1 shows a schematic internal structure diagram of the air flow generating device 10, Figure 2 shows an exploded view of the air flow generating device 10, Figure 3 shows a cross-sectional view of the internal structure of the air flow generating device 10. In the embodiment of the present application, the air flow generating device 10 includes a housing 100 and a fan 200. The housing 100 has an inlet chamber 101, a fan chamber 102, and an outlet chamber 103 that are sequentially connected along an air flow direction ( Figure 1 the direction indicated by the dotted arrow in the figure); and the housing 100 is provided with an air inlet 104 and an air outlet 105. The air inlet 104 is opened at a position of the housing 100 corresponding to the inlet chamber 101 and communicates with the inlet chamber 101, and the air outlet 105 is opened at a position of the housing 100 corresponding to the outlet chamber 103 and communicates with the outlet chamber 103. Combining Figure 1 and Figure 3 as shown, the fan 200 is arranged in the fan chamber 102, and it is used to accelerate the flow of air to generate an air flow, so that after the air flow enters the inlet chamber 101 from the air inlet 104, it can flow through the fan chamber 102 and the outlet chamber 103 in sequence along the above air flow direction and be discharged from the air outlet 105.

[0036] Specifically, in one embodiment, a plurality of partition plates 106 are provided in the housing 100, and the inlet chamber 101, the fan chamber 102, and the outlet chamber 103 are separated by the plurality of partition plates 106. As Figure 1 shown, the plurality of partition plates 106 include a first partition plate 106a and a second partition plate 106b. The first partition plate 106a is arranged between the fan chamber 102 and the outlet chamber 103, and the second partition plate 106b is arranged between the inlet chamber 101 and the fan chamber 102. As Figure 4 and Figure 5As shown in the figure, a first partition plate 106a is provided with a fan installation opening 107 penetrating through opposite sides in its thickness direction. The fan 200 has an air outlet pipe 201, the air outlet pipe 201 has an air outlet 202, and the air outlet pipe 201 is inserted into the fan installation opening 107, with the air outlet 202 facing the outlet chamber 103. The second partition plate 106b is provided with a ventilation opening 108 penetrating through opposite sides in its thickness direction. When the fan 200 is turned on, the airflow in the inlet chamber 101 can flow through the ventilation opening 108 into the fan chamber 102 and enter the fan 200, then enter the outlet chamber 103 from the air outlet 202 of the fan 200, and finally be discharged from the air outlet 105 of the outlet chamber 103.

[0037] By providing multiple partition plates 106 to divide the inner cavity of the housing 100 into an inlet chamber 101, a fan chamber 102, and an outlet chamber 103, it is beneficial to extend the flow path of the airflow. Therefore, the flow energy of the airflow can be reduced, which is further beneficial to reducing the noise generated by the airflow.

[0038] However, as described in the background art, when the fan 200 is operating, the high-speed rotation of the fan blades of the fan 200 will generate relatively large vibration noise, and the airflow velocity at the outlet of the fan 200 is large, which will also form a turbulent airflow. The turbulent airflow will also generate obvious aerodynamic noise. The propagation of these noises through the fan 200 will seriously affect the sleep quality of users, thereby also affecting the user experience. In the prior art, porous sound-absorbing materials are usually installed in the internal air duct to reduce the above-mentioned noises, but there are the following problems with installing porous sound-absorbing materials: on the one hand, the porous sound-absorbing materials will age after long-term use, generating a lot of fine particles, which are carried into the lungs of users by the airflow, seriously endangering the physical health of users; on the other hand, the porous sound-absorbing materials are built into the air path and will accumulate dust and breed bacteria and viruses, seriously endangering the health of users; on the other hand, the porous sound-absorbing materials must reach a certain thickness to have a sound-absorbing effect, and a large volume of the air path is required to achieve a sound-absorbing effect, so the overall volume of the ventilator is very large.

[0039] To solve the above problems, the inventor of the present application considered that when the fan 200 is started, the pressure in the fan chamber 102 will be less than the negative pressure in the outlet chamber 103. Therefore, in an improved embodiment, as Figure 1 and Figure 3 shown, a plurality of return holes 109 are provided on the chamber wall (i.e., the first partition plate 106a) of the fan chamber 102 adjacent to the outlet chamber 103. By providing the return holes 109, as Figure 4As shown, a pressure difference exists between the outlet chamber 103 and the fan chamber 102, enabling a portion of the air flow in the outlet chamber 103 to flow back into the fan chamber 102. This can reduce the aerodynamic noise generated by the turbulent air flow in the outlet chamber 103. Additionally, the vibration noise generated by the fan 200 can be transmitted from the outlet chamber 103 into the fan chamber 102 and ultimately dissipated in the fan chamber 102.

[0040] It can be understood that the aperture size and number of the return holes 109 are not limited. Different aperture sizes and numbers of return holes 109 can eliminate noise in different frequency bands and can be set according to requirements, and are not limited herein.

[0041] Preferably, based on the above embodiment, as Figure 4 shown, in the direction from the fan chamber 102 towards the outlet chamber 103, the return holes 109 extend with equal or variable diameters. In a preferred embodiment, the aperture of the return holes 109 gradually increases, enabling better noise reduction. This is because when sound propagates through a hole with unequal apertures, if it propagates from the smaller aperture end to the larger aperture end, it is similar to a horn amplifying sound and has the effect of amplifying the sound; conversely, when sound propagates from the larger aperture end to the smaller aperture end, it has the opposite effect, thus enabling better noise reduction.

[0042] More preferably, the first partition 106a is also detachably arranged in the housing 100, facilitating the replacement of the first partition 106a with different aperture sizes or numbers of return holes 109, thereby facilitating noise reduction for specific different frequency bands.

[0043] Furthermore, in one embodiment, as Figure 1 shown, a wind resistance member 300 is also provided in the inlet chamber 101. The wind resistance member 300 has an air flow channel passing through its opposite ends, and multiple ribs are provided in the air flow channel. The multiple ribs divide the air flow channel into multiple sub-air flow channels.

[0044] In Figure 1 the embodiment shown, the wind resistance member 300 is cylindrical. Of course, the wind resistance member 300 can also be in a shape composed of multiple parallel flat plates, as long as it can form multiple sub-air flow channels, and is not limited herein.

[0045] By providing the air resistance member 300, multiple sub-airflow channels of the air resistance member 300 can regularize the airflow in the inlet chamber 101, thereby reducing the aerodynamic noise generated by the turbulent airflow in the inlet chamber 101. In addition, providing the air resistance member 300 can also create a pressure difference at both ends of the air resistance member 300, so that the magnitude of the airflow rate can be determined by calculating the pressure difference at both ends of the air resistance member 300, facilitating the adjustment of the air volume of the fan 200.

[0046] Furthermore, as Figure 1 shown, a third partition plate 106c is further provided in the inlet chamber 101 within the housing 100. The third partition plate 106c divides the inlet chamber 101 into a first inlet chamber 101a and a second inlet chamber 101b. In the airflow direction, the second inlet chamber 101b is located between the first inlet chamber 101a and the fan chamber 102. The air inlet 104 is opened on the side wall of the housing 100 corresponding to the first inlet chamber 101a, and the air resistance member 300 is passed through the third partition plate 106c. By providing the third partition plate 106c to divide the inlet chamber 101 into the first inlet chamber 101a and the second inlet chamber 101b, not only can the air resistance member 300 be easily fixed, but also when the vibration noise generated by the fan 200 propagates to the inlet chamber 101, it can be reflected and consumed by the third partition plate 106c, which is beneficial to minimizing the noise transmitted to the air inlet 104.

[0047] In addition, as Figure 2 shown, to facilitate the installation of components such as the fan 200 and the air resistance member 300, the housing 100 includes an upper housing 110 and a lower housing 120. The upper housing 110 is detachably covered on the lower housing 120. Multiple partition plates 106 can be provided in the lower housing 120, so that the inlet chamber 101, the fan chamber 102, and the outlet chamber 103 are formed in the lower housing 120. As long as the upper housing 110 is detached from the lower housing 120, components such as the fan 200 and the air resistance member 300 can be installed. It can be understood that multiple partition plates 106 can also be provided in the upper housing 110, so that the inlet chamber 101, the fan chamber 102, and the outlet chamber 103 are formed in the upper housing 110. Or in other embodiments, a part of each partition plate 106 is provided in the upper housing 110, and the other part is provided in the lower housing 120, so that a part of the inlet chamber 101, the fan chamber 102, and the outlet chamber 103 are respectively formed in the lower housing 120, and the other part is formed in the upper housing 110. The above are not limited.

[0048] Preferably, a seal 130 is further provided between the upper housing 110 and the lower housing 120. By providing the seal 130, the various chambers formed jointly by the upper housing 110 and the lower housing 120 can be sealed to prevent air flow from flowing out through the gap between the upper housing 110 and the lower housing 120, thus affecting the inhalation effect of the user.

[0049] It can be seen from this that for the air flow generating device 10 provided in this application, after the fan 200 is started, most of the air flow blown by the fan 200 to the outlet chamber 103 will be discharged out of the air flow generating device 10 through the air outlet 105, and a small part of the air flow will flow back into the fan chamber 102 through the return hole 109 under the pressure difference formed between the outlet chamber 103 and the fan chamber 102 and be absorbed by the fan 200. Therefore, the air flow in the outlet chamber 103 can be made to flow more smoothly, reducing the aerodynamic noise generated by the turbulent air flow in the outlet chamber 103; and the vibration noise transmitted by the fan 200 to the outlet chamber 103 can be transmitted into the fan chamber 102 through the return hole 109, and the purpose of noise reduction can be achieved after continuous attenuation. In this way, a good noise reduction effect can be achieved without the need to select porous sound-absorbing materials. While reducing costs and shrinking the overall volume of the ventilator, the user experience can also be improved.

[0050] 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 various 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 falling within the scope described in this specification.

[0051] The above-described embodiments only represent several implementation manners of this 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 this application, several modifications and improvements can still be made, and these all belong to the protection scope of this application. Therefore, the protection scope of the patent of this application should be subject to the appended claims.

Claims

1. An air flow generating device, characterized in that, Comprising: A housing (100) having an inlet chamber (101), a fan chamber (102), and an outlet chamber (103) that are sequentially connected along an air flow direction therein; the housing (100) is provided with an air inlet (104) and an air outlet (105), the air inlet (104) is opened at a position of the housing (100) corresponding to the inlet chamber (101) and communicates with the inlet chamber (101), and the air outlet (105) is opened at a position of the housing (100) corresponding to the outlet chamber (103) and communicates with the outlet chamber (103); A fan (200) disposed in the fan chamber (102), the fan (200) being configured to accelerate the flow of air to generate an air flow, so that after the air flow enters the inlet chamber (101) from the air inlet (104), it can sequentially flow through the fan chamber (102) and the outlet chamber (103) along the air flow direction and be discharged from the air outlet (105); A plurality of return holes (109) are opened on the chamber wall of the fan chamber (102) adjacent to the outlet chamber (103), and the return holes (109) are configured to allow a part of the air flow in the outlet chamber (103) to flow back into the fan chamber (102), so as to reduce the aerodynamic noise generated by the turbulent air flow in the outlet chamber (103), and to allow the vibration noise generated by the fan (200) to propagate from the outlet chamber (103) into the fan chamber (102) to dissipate the vibration noise.

2. The air flow generating device according to claim 1, wherein In the direction from the fan chamber (102) towards the outlet chamber (103), the return holes (109) extend with equal or variable diameters.

3. The air flow generating device according to claim 1 or 2, characterized in that, A plurality of partition plates (106) are provided in the housing (100), and the inlet chamber (101), the fan chamber (102), and the outlet chamber (103) are separated by the plurality of partition plates (106); wherein, the partition plate (106) disposed between the fan chamber (102) and the outlet chamber (103) is defined as the first partition plate (106a), and the return holes (109) are opened on the first partition plate (106a) and penetrate through the first partition plate (106a).

4. The air flow generating device according to claim 3, wherein, The first partition plate (106a) is provided with a fan mounting opening (107) penetrating through opposite sides thereof, the fan (200) has an air outlet pipe (201), the air outlet pipe (201) has an air outlet (202), and the air outlet pipe (201) is inserted into the fan mounting opening (107), and the air outlet (202) faces the outlet chamber (103).

5. The air flow generating device according to claim 4, wherein The first partition plate (106a) is detachably disposed in the housing (100).

6. The air flow generating device according to claim 3, wherein The partition (106) provided between the inlet chamber (101) and the blower chamber (102) is defined as the second partition (106b). The second partition (106b) is provided with a ventilation opening (108) penetrating through its opposite sides, and the inlet chamber (101) and the blower chamber (102) communicate with each other through the ventilation opening (108).

7. The air flow generating device according to claim 1, wherein A wind resistance member (300) is provided in the inlet chamber (101). The wind resistance member (300) has an air flow channel penetrating through its opposite ends, and a plurality of ribs are provided in the air flow channel. The plurality of ribs divide the air flow channel into a plurality of air flow sub-channels.

8. The air flow generating device according to claim 7, wherein A third partition (106c) is provided in the housing (100). The third partition (106c) divides the inlet chamber (101) into a first inlet chamber (101a) and a second inlet chamber (101b). In the air flow direction, the second inlet chamber (101b) is located between the first inlet chamber (101a) and the blower chamber (102). The air inlet (104) is provided in the side wall of the housing (100) corresponding to the first inlet chamber (101a), and the wind resistance member (300) penetrates through the third partition (106c).

9. The air flow generating device according to claim 1, wherein The housing (100) includes an upper housing (110) and a lower housing (120). The upper housing (110) is detachably covered on the lower housing (120). The inlet chamber (101), the blower chamber (102) and the outlet chamber (103) are located in the upper housing (110) and / or the lower housing (120).

10. A ventilator, characterized in that, It includes the air flow generating device (10) according to any one of claims 1-9.

Images