Movable negative oxygen ion generator

Abstract

The utility model discloses a movable negative oxygen ion generator, which relates to the field of healthy electric appliances, and comprises a shell, a negative oxygen ion generator, a negative oxygen ion generator and a negative oxygen ion generator, the centrifugal fan is arranged in the shell, an outlet of the centrifugal fan faces the air outlet of the shell, and an inlet of the centrifugal fan is communicated with the air inlet of the shell; when the centrifugal fan is in a working state, air entering from the air inlet of the shell enters the centrifugal fan through the inlet of the centrifugal fan, and flows to the air outlet of the shell from the outlet of the centrifugal fan under the driving of the centrifugal fan; the negative oxygen ion generation module is arranged in the shell and used for generating negative oxygen ions into air output from an impeller of the centrifugal fan, and the negative oxygen ions and air exhausted from an outlet of the centrifugal fan jointly flow out from an air outlet of the shell under the driving of the centrifugal fan. The negative oxygen ion generator can solve the problem that the decibel of noise generated during operation of the negative oxygen ion generator is too large.

Description

Technical Field

[0001] The utility model relates to the field of health electrical appliances, in particular to a movable negative oxygen ion generator. Background Art

[0002] As modern science and technology continues to develop, negative oxygen ion generators, as a device that can improve air quality and provide a healthy environment, have received widespread attention and application. However, in its practical application, there are still some technical problems that need to be solved.

[0003] Among them, excessive noise from negative oxygen ion generators is a more prominent defect. In order to blow out the air with negative oxygen ions and spread it over a wider range, the fan inside the negative oxygen ion generator will run at a relatively high speed, which often produces loud noise. At the same time, in addition to the fan, other structures of the negative oxygen ion generator, such as improper positioning of the negative oxygen ion generation module and insufficient sound insulation measures, will also aggravate the generation of noise to a certain extent.

[0004] Excessive noise not only affects the user's comfort experience, but may even interfere with normal work and study in some places that have high requirements for a quiet environment, such as hospital wards, school classrooms, libraries, study rooms and bedrooms. Therefore, reducing the noise of negative oxygen ion generators and improving their quietness have become important directions for the current research and development and improvement of negative oxygen ion generator technology. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the embodiment of the utility model is to provide a movable negative oxygen ion generator, which can solve the problem of excessive decibels of noise emitted by the negative oxygen ion generator during operation.

[0006] The specific technical solution of the embodiment of the utility model is:

[0007] A portable negative oxygen ion generator, comprising:

[0008] A housing, wherein an air inlet and an air outlet are provided on the housing;

[0009] A centrifugal fan is arranged in the housing, the outlet of the centrifugal fan faces the air outlet of the housing, and the inlet of the centrifugal fan is connected to the air inlet of the housing;

[0010] When the centrifugal fan is in working state, air entering from the air inlet of the housing enters the centrifugal fan through the inlet of the centrifugal fan, and flows from the outlet of the centrifugal fan to the air outlet of the housing under the drive of the centrifugal fan;

[0011] A negative oxygen ion generation module disposed within the housing, the negative oxygen ion generation module being configured to generate negative oxygen ions in the air output from the impeller of the centrifugal fan and, driven by the centrifugal fan, flow out of the air outlet of the housing together with the air discharged from the outlet of the centrifugal fan through the air outlet of the housing.

[0012] Preferably, a display component is provided on the housing, the display component being configured to display the pre-stored negative oxygen ion concentration at a predetermined distance from the negative oxygen ion generator after the movable negative oxygen ion generator is turned on.

[0013] Preferably, the predetermined distance is: greater than or equal to 0 m and less than or equal to 1.5 m.

[0014] Preferably, a flow channel is provided between the impeller of the centrifugal fan and the air outlet, and the cross-sectional area of the flow channel gradually increases in the direction from the impeller of the centrifugal fan to the air outlet of the housing.

[0015] Preferably, the negative oxygen ion generator further includes an aroma module, the aroma module being disposed inside the housing and between the air inlet of the housing and the air outlet of the housing.

[0016] Preferably, the aroma module is disposed in the flow channel between the outlet of the centrifugal fan and the air outlet of the housing or at the air outlet of the housing.

[0017] Preferably, the housing is cylindrical, the housing includes a first end and a second end, the first end has an opening to form the air outlet, and the air inlet is formed on the side wall of the housing.

[0018] Preferably, the inlet of the centrifugal fan is disposed opposite to the air inlet of the housing.

[0019] Preferably, the inlet of the centrifugal fan includes a first inlet and a second inlet disposed opposite to each other, and both the first inlet and the second inlet are in communication with the air inlet of the housing.

[0020] Preferably, the air inlet of the housing and the centrifugal fan are both disposed near the second end of the housing.

[0021] Preferably, the centrifugal fan includes: a volute and an impeller disposed within the volute, and the extending direction of the rotation axis of the impeller is perpendicular in space to the extending direction of the housing from the first end to the second end.

[0022] Preferably, the second end of the housing has a bottom wall, and the bottom wall is connected to the side wall.

[0023] Preferably, a partition is provided inside the housing, and the flow channel is formed between the partition and the first part of the housing.

[0024] Preferably, the partition board includes a side plate portion and a bottom plate portion. Both the side plate portion and the bottom plate portion are connected to the side wall of the housing, and an opening adapted to the outlet of the centrifugal fan is provided on the bottom plate portion.

[0025] Preferably, the housing includes a first end and a second end. One end of the side plate portion is connected to the side wall near the first end, the other end of the side plate portion is connected to the bottom plate portion, and the area of the bottom plate portion is smaller than the area of the first end of the housing.

[0026] Preferably, an installation cavity is formed between the partition board and the second part of the housing, and the centrifugal fan and at least part of the negative oxygen ion generation module are accommodated in the installation cavity.

[0027] Preferably, the centrifugal fan is arranged between the bottom plate portion and the second end of the housing.

[0028] Preferably, the bottom plate portion is parallel to the plane where the first end of the housing is located, and the whole side plate portion extends along a preset direction from the first end to the second end of the housing and has an inclination angle with the preset direction.

[0029] Preferably, the housing includes a first housing and a second housing which are sleeved with each other. The air inlet includes a first air inlet provided on the first housing and a second air inlet provided on the second housing, and the first air inlet is communicated with the second air inlet.

[0030] Preferably, the first air inlet and the second air inlet are arranged opposite to each other.

[0031] Preferably, the first air inlet and the second air inlet are of a grid-like structure.

[0032] Preferably, the release port of the negative oxygen ion generation module is located downstream of the outlet of the centrifugal fan and extends into the flow channel between the outlet of the centrifugal fan and the air outlet of the housing.

[0033] Preferably, the negative oxygen ion generation module includes a housing and a negative oxygen ion generation electrode arranged in the housing. The housing includes an inlet and a release port. The inlet of the housing is located outside the flow channel. In the working state, the movable negative oxygen ion generator can ionize the air flowing in from the inlet of the housing to generate negative oxygen ions and discharge them into the flow channel from the release port.

[0034] Preferably, a flow channel is provided between the outlet of the centrifugal fan and the air outlet, and the cross-sectional area of the flow channel near the air outlet is larger than the cross-sectional area of the flow channel near the outlet of the centrifugal fan.

[0035] Preferably, the release port of the negative oxygen ion generation module is arranged close to the outlet of the centrifugal fan.

[0036] Preferably, the release port of the negative oxygen ion generation module is located inside the volute of the centrifugal fan.

[0037] Preferably, the change rate of the cross-sectional area of the partial flow channel close to the outlet of the centrifugal fan is smaller than that of the partial flow channel close to the air outlet.

[0038] Preferably, the air outlet includes at least one ring-shaped opening, and the air outlet direction of the ring-shaped opening forms a preset angle with the axis of the negative oxygen ion generator.

[0039] Preferably, there are at least two ring-shaped openings. The air outlet directions of the at least two ring-shaped openings are different. Along the direction from the inside to the outside, the angle between the air outlet direction of the ring-shaped opening closer to the outside and the axis is greater than the angle between the air outlet direction of the ring-shaped opening closer to the inside and the axis.

[0040] Preferably, the display component is used to display the centrifugal fan at different operating gears and / or the negative oxygen ion generation module at different operating gears and / or the negative oxygen ion concentration at different preset distances from the negative oxygen ion generator after the portable negative oxygen ion generator is turned on.

[0041] Preferably, the portable negative oxygen ion generator has a control component, and the control component is used to adjust the operating gear of the centrifugal fan and / or the gear of the negative oxygen ion generation module and / or the preset distance from the portable negative oxygen ion generator. The display component displays the negative oxygen ion concentration corresponding to the operating gear of the centrifugal fan and / or the gear of the negative oxygen ion generation module selected by the control component and / or the different preset distances from the negative oxygen ion generator selected.

[0042] The technical solution of the present utility model has the following remarkable beneficial effects:

[0043] In the working state of the centrifugal fan, the movable negative oxygen ion generator in this application can take in the air entering from the air inlet of the housing through the inlet of the centrifugal fan, enter the centrifugal fan, and flow from the outlet of the centrifugal fan to the air outlet of the housing under the drive of the centrifugal fan. At the same time, the negative oxygen ion generation module can be in an operating state, so that negative oxygen ions can be generated in the air output from the impeller of the centrifugal fan, and under the drive of the centrifugal fan, they flow out from the air outlet of the housing together with the air discharged from the outlet of the centrifugal fan. In this way, the air output from the air outlet of the housing of the movable negative oxygen ion generator contains negative oxygen ions. Moreover, since a centrifugal fan is used, under the condition of the same air volume, the rotation speed of the centrifugal fan is relatively low, and the outer shell of the centrifugal fan usually has better sound insulation and noise reduction effects. The outlet of the centrifugal fan is directed towards the air outlet of the housing, and the degree of turbulence generated by the air output from the outlet of the centrifugal fan is relatively small. In this way, the decibel of the noise generated by the fan during operation can be greatly reduced, thereby improving the user experience and enabling the movable negative oxygen ion generator to be applicable to more places with high requirements for a quiet environment.

[0044] Referring to the following description and the accompanying drawings, specific embodiments of the present invention are disclosed in detail, indicating the ways in which the principles of the present invention can be employed. It should be understood that the embodiments of the present invention are not limited thereby in scope. Features described and / or illustrated for one embodiment can be used in the same or similar manner in one or more other embodiments, combined with the features in other embodiments, or replace the features in other embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the disclosure of the present invention in any way. Additionally, the shapes and proportional dimensions of the components in the drawings are only schematic and are used to assist in understanding the present invention, rather than specifically defining the shapes and proportional dimensions of the components of the present invention. Those skilled in the art can, under the teaching of the present invention, select various possible shapes and proportional dimensions according to specific circumstances to implement the present invention.

[0046] Figure 1 It is the front view of the movable negative oxygen ion generator in an embodiment of the present invention in one embodiment;

[0047] Figure 2 It is the front view of the movable negative oxygen ion generator in an embodiment of the present invention in another embodiment;

[0048] Figure 3 It is the top view of the movable negative oxygen ion generator in an embodiment of the present invention in one embodiment;

[0049] Figure 4 This is a sectional view of the movable negative oxygen ion generator in one embodiment of the present utility model;

[0050] Figure 5 This is a sectional view of the movable negative oxygen ion generator in another embodiment of the present utility model.

[0051] Reference numerals of the above drawings:

[0052] 1. Negative oxygen ion generation module; 11. Release port; 2. Housing; 21. Air inlet; 22. Air outlet; 23. First end; 24. Second end; 25. Bottom wall; 26. Partition; 261. Side plate part; 262. Bottom plate part; 2621. Opening; 27. First housing; 28. Second housing; 29. End cover; 3. Centrifugal fan; 31. Volute; 32. Impeller; 4. Flow channel; 5. Aroma module; 6. Installation cavity; 7. Power cord interface; 8. Control component. Detailed implementation manners

[0053] Combined with the description of the drawings and the specific implementation manners of the present utility model, the details of the present utility model can be understood more clearly. However, the specific implementation manners of the present utility model described herein are only for the purpose of explaining the present utility model and cannot be understood in any way as a limitation of the present utility model. Under the teaching of the present utility model, those skilled in the art can conceive any possible deformation based on the present utility model, and these should all be regarded as belonging to the scope of the present utility model. It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When 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. The terms "installation", "connection" and "coupling" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the communication inside two elements. It can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific situations. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used herein in the description of this application are only for the purpose of describing specific implementation manners and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0055] In order to solve the problem of excessive noise decibels emitted by a negative oxygen ion generator during operation, a portable negative oxygen ion generator is proposed in this application. Figure 1 This is the front view of the portable negative oxygen ion generator in an embodiment of the present utility model in one implementation manner. Figure 2 This is the front view of the portable negative oxygen ion generator in an embodiment of the present utility model in another implementation manner. Figure 3 This is the top view of the portable negative oxygen ion generator in an embodiment of the present utility model in one implementation manner. Figure 4 This is the sectional view of the portable negative oxygen ion generator in an embodiment of the present utility model in one implementation manner. Figure 5 This is the sectional view of the portable negative oxygen ion generator in an embodiment of the present utility model in another implementation manner. As Figures 1 to 5 shown, the portable negative oxygen ion generator may include: a housing 2, on which an air inlet 21 and an air outlet 22 are provided; a centrifugal fan 3 disposed inside the housing 2, the outlet of the centrifugal fan 3 facing the air outlet 22 of the housing 2, and the inlet of the centrifugal fan 3 communicating with the air inlet 21 of the housing 2; when the centrifugal fan 3 is in the working state, the air entering from the air inlet 21 of the housing 2 enters the centrifugal fan 3 through the inlet of the centrifugal fan 3, and flows from the outlet of the centrifugal fan 3 to the air outlet 22 of the housing 2 under the drive of the centrifugal fan 3; a negative oxygen ion generation module 1 disposed inside the housing 2, the negative oxygen ion generation module 1 being configured to generate negative oxygen ions in the air output from the impeller 32 of the centrifugal fan 3 and, under the drive of the centrifugal fan 3, flow out from the air outlet 22 of the housing 2 together with the air discharged from the outlet of the centrifugal fan 3.

[0056] In this application, when the centrifugal fan 3 of the portable negative oxygen ion generator is in the working state, the air entering from the air inlet 21 of the housing 2 can enter the centrifugal fan 3 through the inlet of the centrifugal fan 3, and flow from the outlet of the centrifugal fan 3 to the air outlet 22 of the housing 2 under the drive of the centrifugal fan 3. At the same time, the negative oxygen ion generation module 1 can be in the operating state, so that negative oxygen ions can be generated in the air output from the impeller 32 of the centrifugal fan 3, and, under the drive of the centrifugal fan 3, flow out from the air outlet 22 of the housing 2 together with the air discharged from the outlet of the centrifugal fan 3. In this way, the air output from the air outlet 22 of the housing 2 of the portable negative oxygen ion generator can contain negative oxygen ions. Moreover, since a centrifugal fan 3 is used for the fan, under the condition of the same air volume, the rotational speed of the centrifugal fan 3 is relatively low, the outer shell of the centrifugal fan 3 usually has better sound insulation and noise reduction effects, and the outlet of the centrifugal fan 3 faces the air outlet 22 of the housing 2, so that the degree of air turbulence generated by the air output from the outlet of the centrifugal fan 3 is small. In this way, the decibels of the noise generated by the centrifugal fan 3 during operation can be greatly reduced, thereby improving the user experience and enabling the portable negative oxygen ion generator to be applicable to more places with high requirements for a quiet environment.

[0057] In order to better understand the portable negative oxygen ion generator in this application, the following will further explain and illustrate it. As Figures 1 to 5 shown, the portable negative oxygen ion generator may include a housing 2, a centrifugal fan 3, and a negative oxygen ion generation module 1. Among them, an air inlet 21 and an air outlet 22 may be provided on the housing 2. Under the action of the centrifugal fan 3, the outside air can enter the interior of the housing 2 from the air inlet 21, and the air inside the housing 2 is output through the air outlet 22. The centrifugal fan 3 is arranged inside the housing 2. The centrifugal fan 3 may have an inlet and an outlet. The outlet of the centrifugal fan 3 may face the air outlet 22 of the housing 2, so as to reduce the degree of turbulent flow during the process of the air output from the outlet of the centrifugal fan 3 flowing to the air outlet 22 of the housing 2, and further reduce the noise generated during the air flow. The inlet of the centrifugal fan 3 is communicated with the air inlet 21 of the housing 2 to ensure that the air flowing in from the air inlet 21 of the housing 2 can flow to the inlet of the centrifugal fan 3. When the centrifugal fan 3 is in the working state, the air entering from the air inlet 21 of the housing 2 enters the centrifugal fan 3 through the inlet of the centrifugal fan 3, and flows from the outlet of the centrifugal fan 3 to the air outlet 22 of the housing 2 under the drive of the centrifugal fan 3.

[0058] As Figures 4 to 5 shown, the negative oxygen ion generation module 1 is arranged inside the housing 2. The negative oxygen ion generation module 1 is used to generate negative oxygen ions in the air output from the impeller 32 of the centrifugal fan 3 and, under the drive of the centrifugal fan 3, flow out of the housing 2 through the air outlet 22 together with the air discharged from the outlet of the centrifugal fan 3. In order to enable the negative oxygen ions generated by the negative oxygen ion generation module 1 to be mixed into the air output by the centrifugal fan 3, as a feasible solution, the release port 11 of the negative oxygen ion generation module 1 may be located near the outlet of the centrifugal fan 3 or inside the volute 31 of the centrifugal fan 3 or downstream of the outlet of the centrifugal fan 3 and extend into the flow channel 4 between the outlet of the centrifugal fan 3 and the air outlet 22 of the housing 2. In the above several ways, the negative oxygen ions generated by the negative oxygen ion generation module 1 can be mixed into the air before the air output by the centrifugal fan 3 flows out of the air outlet 22 of the housing 2. In this way, the negative oxygen ions can be more evenly diffused outside the housing 2 along with the air flowing out of the air outlet 22 of the housing 2. That is to say, where the air flowing out of the air outlet 22 of the housing 2 can diffuse to, the negative oxygen ions can also diffuse to. By setting the negative oxygen ion generation module 1, the air output from the air outlet 22 of the portable negative oxygen ion generator can contain negative oxygen ions.

[0059] The portable negative ion generator in this application uses a centrifugal fan 3. The impeller 32 of the centrifugal fan 3 is usually backward-inclined or forward-inclined. The movement of the air flow inside the impeller 32 is relatively stable and orderly, and the noise is relatively smaller compared to the axial flow fan. The impeller of the axial flow fan makes the air flow axially, and the flow of the air flow in the blade channel is relatively complex, easily generating turbulence and vortices, thus resulting in relatively greater noise. The design of the impeller 32 of the centrifugal fan 3 can better guide the air flow, reduce the chaos and conflict of the air flow, and thus reduce the generation of noise. Moreover, generally speaking, under the same air volume requirement, the rotational speed of the centrifugal fan 3 is relatively low. The lower the rotational speed, the usually smaller the mechanical noise and aerodynamic noise generated during the operation of the fan. For example, to achieve the same air volume, the centrifugal fan 3 can operate at a lower rotational speed, thereby reducing the noise level; while the axial flow fan often requires a higher rotational speed to achieve a larger air volume, which will lead to an increase in noise.

[0060] The outer shell of the centrifugal fan 3 usually has better sound insulation and noise reduction effects, which can effectively block and absorb the noise generated inside the fan, and thus can significantly reduce the noise transmitted outward. The duct design of the axial flow fan is relatively simple, and its noise suppression effect is far less significant than that of the centrifugal fan 3. In terms of mechanical vibration, the balance performance of the impeller 32 and the shaft of the centrifugal fan 3 is usually better, and the mechanical vibration generated during operation is relatively small, thus reducing the noise caused by vibration; while the axial flow fan may generate relatively greater mechanical vibration during operation due to its structural characteristics, which will increase the noise to a certain extent.

[0061] Such as Figures 4 to 5As shown, a flow channel 4 is provided between the outlet of the centrifugal fan 3 and the air outlet 22. The air output from the outlet of the centrifugal fan 3 flows through the flow channel 4 and is then output from the air outlet 22, thereby leaving the housing 2. Along the direction from the outlet of the centrifugal fan 3 to the air outlet 22 of the housing 2, the cross-sectional area of the flow channel 4 can gradually increase. The cross-sectional area of the flow channel 4 near the air outlet 22 is larger than the cross-sectional area of the flow channel 4 near the outlet of the centrifugal fan 3. At this time, preferably, the release port 11 of the negative oxygen ion generation module 1 is arranged close to the outlet of the centrifugal fan 3. In this way, the negative oxygen ions released from the release port 11 of the negative oxygen ion generation module 1 can directly diffuse into the air at the upstream or starting end of the flow channel 4, so that the air diffused downstream in the flow channel 4 is more evenly mixed with negative oxygen ions. When the air flows through the flow channel 4 with a gradually increasing cross-sectional area, the velocity of the air flow will gradually decrease. According to the acoustic principle, the decrease in the air flow velocity will reduce the friction and turbulence generated by the high-speed movement of the air flow, thereby reducing the aerodynamic noise. For example, between the outlet of the centrifugal fan 3 and the air outlet 22 of the housing 2, if the cross-sectional area of the flow channel 4 decreases, the air flow will be forced to accelerate in the narrow area, resulting in the disorder of the air flow and the formation of vortices. This disorder and vortices will cause pressure fluctuations, thereby generating relatively large noise. When the cross-sectional area of the flow channel 4 gradually increases, the air flow can diffuse and decelerate more smoothly, which reduces the friction between the air flow and the wall surface of the flow channel 4 and reduces the noise generated by friction. At the same time, the smooth air flow also reduces the energy loss and pressure pulsation inside the air flow, further reducing the generation of noise.

[0062] In order to form the flow channel 4 between the outlet of the centrifugal fan 3 and the air outlet 22, as feasible, as Figures 4 to 5 shown, the interior of the housing 2 has a partition 26, and a flow channel 4 is formed between the partition 26 and the first part of the housing 2.

[0063] In a feasible specific embodiment, as Figures 4 to 5 shown, the partition 26 may include a side plate portion 261 and a bottom plate portion 262. Both the side plate portion 261 and the bottom plate portion 262 are connected to the side wall of the housing 2, and an opening 2621 adapted to the outlet of the centrifugal fan 3 is provided on the bottom plate portion 262. The air output from the outlet of the centrifugal fan 3 enters the flow channel 4 through the opening 2621. The side plate portion 261 extends integrally along the direction from the first end 23 of the housing 2 to the second end 24 of the housing 2. The bottom plate portion 262 may be parallel to the plane where the first end 23 of the housing 2 is located. The side plate portion 261 extends integrally along the preset direction from the first end 23 of the housing 2 to the second end 24 of the housing 2 and has an inclination angle with respect to the preset direction. Or, the side plate portion 261 extends generally along the extension direction of the flow channel 4.

[0064] As feasible, as Figures 1 to 5As shown, the housing 2 can be a cylindrical structure. The housing 2 can include a first end 23 and a second end 24. The first end 23 has an opening to form an air outlet 22, and an air inlet 21 is formed on the side wall of the housing 2. Specifically, the first end 23 and the second end 24 can be arranged in opposite directions. For example, the first end 23 can face upward, and the second end 24 can face downward. The opening on the first end 23 can be formed at the end face of the first end 23, that is to say, the air outlet 22 can be formed at the end face of the first end 23. Due to the positional relationship between the inlet and outlet of the centrifugal fan 3 itself, when the outlet of the centrifugal fan 3 faces the air outlet 22 of the housing 2, the inlet of the centrifugal fan 3 faces the side wall of the housing 2. In order to enable the air flowing into the air inlet 21 of the housing 2 to directly enter the inlet of the centrifugal fan 3, reduce the degree of turbulence generated when the air flows in the housing 2, and thus reduce the generation of noise, the air inlet 21 of the housing 2 can be formed on the side wall of the housing 2. Further, the inlet of the centrifugal fan 3 is arranged opposite to the air inlet 21 of the housing 2.

[0065] As a feasible solution, one end of the side plate portion 261 of the partition plate 26 can be connected to the side wall near the first end 23. The other end of the side plate portion 261 is connected to the bottom plate portion 262. The area of the bottom plate portion 262 is smaller than the area of the first end 23 of the housing 2, so that the cross-sectional area of the flow channel 4 can gradually increase along the direction from the outlet of the centrifugal fan 3 to the air outlet 22 of the housing 2.

[0066] As Figures 4 to 5 As shown, an installation cavity 6 is formed between the partition plate 26 and the second part of the housing 2. The centrifugal fan 3 and at least part of the negative ion generation module 1 are accommodated in the installation cavity 6. The first part and the second part of the housing 2 are different parts. The first part and the second part of the housing 2 can form at least part of the housing 2. Among them, an installation cavity 6 is formed between the side plate portion 261, the bottom plate portion 262 and part of the housing 2, and at least part of the negative ion generation module 1 is accommodated in the installation cavity 6. The centrifugal fan 3 is arranged between the bottom plate portion 262 and the second end 24 of the housing 2. Specifically, another installation cavity 6 is formed between the bottom plate portion 262 and the housing 2 below the bottom plate portion 262, and the centrifugal fan 3 is accommodated in the installation cavity 6. In other feasible embodiments, components such as a controller for controlling the movable negative ion generator and a voltage converter for supplying high voltage to the negative ion generation module 1 can be accommodated in the installation cavity 6.

[0067] Due to the existence of the installation cavity 6, the installation cavity 6 can be located on one side deviating from the axis of the housing 2, while the outlet of the centrifugal fan 3 can be located on the other side deviating from the axis of the housing 2. The center of the inlet of the flow channel 4 is located on the other side deviating from the axis of the housing 2. As the flow channel 4 extends towards the first end 23 of the housing, the cross-sectional area of the flow channel 4 in the radial direction continuously increases. The expansion trend of the cross-section of the flow channel 4 towards the side deviating from the axis of the housing 2 is greater than the expansion trend towards the other side deviating from the axis of the housing 2, so that the center of the outlet of the flow channel 4 generally coincides with the axis of the housing 2.

[0068] In a feasible implementation manner, the negative oxygen ion generation module 1 can include a housing and a negative oxygen ion generation electrode disposed inside the housing. When the negative oxygen ion generation electrode is energized with high voltage, negative oxygen ions can be generated.

[0069] Furthermore, the housing includes an inlet and a release port 11. As Figures 4 to 5 shown, the inlet of the housing is located outside the flow channel 4. Since the release port 11 of the negative oxygen ion generation module 1 is located at the outlet of the centrifugal fan 3 or inside the volute 31 of the centrifugal fan 3 or downstream of the outlet of the centrifugal fan 3 and extends into the flow channel 4 between the outlet of the centrifugal fan 3 and the air outlet 22 of the housing 2, therefore, when the air generated by the impeller 32 of the centrifugal fan 3 is output from the outlet of the centrifugal fan 3 and flows out from the air outlet 22 of the housing 2 through the flow channel 4, a suction force can be generated at the release port 11 of the negative oxygen ion generation module 1, so that the portable negative oxygen ion generator can ionize the air flowing in from the inlet of the housing to generate negative oxygen ions and discharge them from the release port 11 into the flow channel 4 in the working state. Through the above, it can be ensured that the negative oxygen ions generated by the negative oxygen ion generation module 1 can efficiently flow and diffuse into the air flowing through the flow channel 4, so that the portable negative oxygen ion generator outputs air with a higher negative oxygen ion concentration.

[0070] In order to generate a suction force at the release port 11 of the negative oxygen ion generation module 1, as Figure 4 shown, the orientation of the release port 11 of the negative oxygen ion generation module 1 is perpendicular to the flow direction of the air at the release port 11, or, as Figure 5 shown, the orientation of the release port 11 of the negative oxygen ion generation module 1 is consistent with the flow direction of the air at the release port 11, that is, less than 90 degrees.

[0071] As Figures 4 to 5As shown in the figure, the centrifugal fan 3 may include: a volute 31 and an impeller 32 disposed within the volute 31. As an option, the extending direction of the rotation axis of the impeller 32 may be spatially perpendicular to the extending direction from the first end 23 to the second end 24 of the housing 2. The second end 24 of the housing 2 has a bottom wall 25, and the bottom wall 25 is connected to the side wall. Through the above layout, the inlet of the centrifugal fan 3 can be oriented towards the side wall of the housing 2, facilitating the formation of the air inlet 21 on the side wall of the housing 2. Thus, the bottom wall 25 of the second end 24 of the housing 2 can be used as a movable negative ion generator and placed on a tabletop or the contact surface of other furniture.

[0072] In order to reduce the air flow velocity at the inlet of the centrifugal fan 3 and further reduce the generation of noise, as an option, the inlet of the centrifugal fan 3 may include a first inlet and a second inlet disposed opposite to each other. Both the first inlet and the second inlet are connected to the air inlet 21 of the housing 2. The first inlet and the second inlet may be located on both sides of the centrifugal fan 3 respectively. The air inlet 21 on the housing 2 may be one, which is disposed opposite to one of the first inlet and the second inlet, and the other is connected through the space of the housing 2. The air inlet 21 on the housing 2 may also be two, and the two air inlets 21 are disposed opposite to each other on the housing 2, so as to be respectively disposed opposite to the first inlet and the second inlet of the centrifugal fan 3.

[0073] Furthermore, as Figures 1 to 5 shown, the air inlet 21 of the housing 2 and the centrifugal fan 3 may both be disposed near the second end 24 of the housing 2. The flow channel 4 between the outlet of the centrifugal fan 3 and the air outlet 22 is near the first end 23 of the housing 2.

[0074] As an option, as Figures 4 to 5 shown, the housing 2 includes a first housing 27 and a second housing 28 which are sleeved with each other. For example, the first housing 27 is sleeved outside the second housing 28. The outer surface of the first housing 27 may adopt more beautiful materials, patterns, shapes, etc., to make it have a higher aesthetic degree and improve the user's viewing experience. The second housing 28 is mainly used to accommodate and install the centrifugal fan 3, the negative ion generation module 1, and form the corresponding flow channel 4 to meet the structural functions. For example, the partition 26 may be connected to the second housing 28 or integrally formed with the second housing 28, etc. In order to meet the structural functions and install and accommodate the corresponding components, the second housing 28 may be assembled by connecting multiple components.

[0075] In order to enable external air to flow into the inlet of the centrifugal fan 3 within the first housing 27 and the second housing 28 through the air inlet 21, the air inlet 21 may include a first air inlet 21 provided on the first housing 27 and a second air inlet 21 provided on the second housing 28. The first air inlet 21 communicates with the second air inlet 21. In this way, external air can flow into the inlet of the centrifugal fan 3 through the first air inlet 21 and the second air inlet 21. Further, the first air inlet 21 and the second air inlet 21 are oppositely arranged, thereby reducing the noise generated by air turbulence during the flow process.

[0076] In the above-mentioned various embodiments, as Figures 1 to 2 shown, the first air inlet 21 and the second air inlet 21 can adopt a grid-like structure. In this way, not only can the sufficient strength of the housing 2 be ensured, but also the external air can smoothly pass through the first air inlet 21 and the second air inlet 21 and enter the inlet of the centrifugal fan 3, which helps to reduce the wind resistance and reduce the noise.

[0077] When there is one air inlet 21 on the housing 2, the air inlet 21 with a grid-like structure can be arranged around 360 degrees in the circumferential direction. In this way, when the centrifugal fan 3 is installed in the housing 2, there is no need to consider the angle of the inlet of the centrifugal fan 3 in the circumferential direction. Similarly, when there are two air inlets 21 on the housing 2, the two air inlets 21 with a grid-like structure together can be arranged around 360 degrees in the circumferential direction. In this way, there is no need to consider the angles of the first inlet and the second inlet of the centrifugal fan 3 in the circumferential direction.

[0078] In the case where the first housing 27 and the second housing 28 are in a structure of being sleeved with each other, as feasible, the first air inlet 21 on the outer first housing 27 can be arranged around 360 degrees in the circumferential direction. In this way, when the second housing 28 is installed inside the first housing 27, there is no need to consider the angle of the second air inlet 21 of the second housing 28 in the circumferential direction, and it can be oppositely arranged with the first air inlet 21 at any position when installed inside the first housing 27. This helps to improve the production and assembly of the movable negative oxygen ion generator.

[0079] As feasible, the negative oxygen ion generator may include an aroma module 5. The aroma module 5 is used to emit fragrance into the air flowing in through the air inlet 21 of the housing 2, so that the air flowing out from the air outlet 22 of the housing 2 not only contains negative oxygen ions but also has a fragrance. The aroma module 5 can be arranged inside the housing 2 and between the air inlet 21 and the air outlet 22 of the housing 2. Further, as Figures 4 to 5As shown, the fragrance module 5 is disposed in the flow channel 4 between the outlet of the centrifugal fan 3 and the air outlet 22 of the housing 2 or at the air outlet 22 of the housing 2. Since the cross-section at the flow channel 4 or the air outlet 22 is relatively larger, the degree of air turbulence when the air flows through the flow channel 4 or the air outlet 22 can be reduced, thereby relatively reducing the generated noise.

[0080] As a feasible solution, as Figure 4 shown, the change rate of the cross-sectional area of the partial flow channel 4 near the outlet of the centrifugal fan 3 is smaller than that of the partial flow channel 4 near the air outlet 22. Since the change rate of the cross-sectional area of the flow channel 4 is larger closer to the air outlet 22, the cross-section at the air outlet 22 of the housing 2 suddenly becomes very large. In this way, when the fragrance module 5 is disposed at the air outlet 22 of the housing 2, the degree of disturbance of the fragrance module 5 to the air flowing through the air outlet 22 of the housing 2 can be reduced to a very low level, thereby minimizing the generated noise.

[0081] The air outlet 22 is located at the end face of the first end 23 of the housing 2. As a feasible solution, the air outlet 22 includes at least one circle of annular openings, and the air outlet direction of the annular openings forms a preset angle with the axis of the negative ion generator. With the above structure, the air flowing out from the air outlet 22 can diffuse outward in the circumferential direction of the axis of the negative ion generator, thereby increasing the diffusion range of the negative ions output by the portable negative ion generator.

[0082] Furthermore, as Figures 3 to 5 shown, the annular openings are at least two circles, and the air outlet directions of the at least two circles of annular openings are different. Along the direction from the inside to the outside, the angle between the air outlet direction of the annular opening closer to the outside and the axis is greater than the angle between the air outlet direction of the annular opening closer to the inside and the axis. With this structure, the degree and range of the air flowing out from the air outlet 22 diffusing outward in the circumferential direction of the axis of the negative ion generator can be further increased, thereby further increasing the diffusion range of the negative ions output by the portable negative ion generator.

[0083] As a feasible solution, as Figures 3 to 5As shown in the figure, the portable negative oxygen ion generator may include an end cap 29, and the housing 2 may include this end cap 29. The air outlet 22 of the housing 2 may be provided on the end cap 29. The end cap 29 forms the end face of the first end 23 of the housing 2. The end cap 29 may be detachably connected to the rest of the components of the housing 2. The fragrance module 5 may be installed on the end cap 29, which is convenient for the replacement or replenishment of the fragrance module 5. Further, the fragrance module 5 may be installed at the inner wall of the end cap 29, which can improve the aesthetic degree of the portable negative oxygen ion generator and facilitate the fragrance emitted by the fragrance module 5 to be mixed into the air flowing through the flow channel 4. In order to further reduce the disturbance degree of the fragrance module 5 to the air flowing through the air outlet 22 of the housing 2, the fragrance module 5 may be installed in the middle of the inner wall of the end cap 29. In the radial direction of the end cap 29, the air outlet 22 is located outside the fragrance module 5. When the end cap 29 is detachably connected to the rest of the components of the housing 2, when the fragrance module 5 installed on the inner wall of the end cap 29 needs to be replenished or replaced, the end cap 29 can be directly disassembled to facilitate the above operations. For example, the inner wall of the end cap 29 may form a fragrance accommodating portion that can accommodate the fragrance module 5 and can be opened. After the fragrance accommodating portion is opened, the fragrance module 5 can be installed therein, and then the fragrance accommodating portion is closed. The fragrance accommodating portion has holes for fragrance emission, so that the fragrance generated by the fragrance module 5 can be emitted. In other feasible embodiments, the fragrance module 5 may also be installed on the outer wall of the end cap 29. Further, as Figures 4 to 5 shown in the figure, a concave portion may be formed on the outer wall of the end cap 29, and the fragrance module 5 may be installed in the concave portion, so that the fragrance module 5 does not protrude too much outside the end cap 29 when installed in the concave portion, which can improve the aesthetic degree of the portable negative oxygen ion generator and facilitate the replacement or replenishment of the fragrance module 5. Although users cannot directly feel the existence of negative oxygen ions, through the fragrance emitted by the fragrance module 5, users can indirectly feel that there are more negative oxygen ions in the areas where the fragrance can be clearly smelled.

[0084] Feasibly, a display component may be provided on the housing 2, and the display component is used to display the negative oxygen ion concentration at a predetermined distance from the negative oxygen ion generator stored after the portable negative oxygen ion generator is turned on. For example, considering that the output wind speed of the portable negative oxygen ion generator is limited and the negative oxygen ion concentration at a relatively large predetermined distance is too low, the predetermined distance may preferably be greater than or equal to 0 m and less than or equal to 1.5 m. In this way, users can know the negative oxygen ion concentration at a predetermined distance from the negative oxygen ion generator.

[0085] When the predetermined distance is 0m, it can be considered that the display component displays the negative oxygen ion concentration at the air outlet of the housing. This negative oxygen ion concentration can be pre-stored in the portable negative oxygen ion generator or obtained through real-time measurement. For example, the portable negative oxygen ion generator can include a negative oxygen ion concentration detection component disposed at the air outlet of the housing, which is used to detect the negative oxygen ion concentration at the air outlet of the housing. The display component acquires the negative oxygen ion concentration detected by the negative oxygen ion concentration detection component and displays it.

[0086] Furthermore, the negative oxygen ion concentration at a predetermined distance from the negative oxygen ion generator can vary according to the air volume output by the centrifugal fan 3 and the negative oxygen ion concentration generated by the negative oxygen ion generation module 1. These data can be obtained through a limited number of experiments and then pre-stored in the portable negative oxygen ion generator. The display component only needs to directly obtain the corresponding negative oxygen ion concentration based on the predetermined distance from the negative oxygen ion generator, the air volume output by the centrifugal fan 3 (since this data is not easily directly obtained, it can be replaced by parameters such as the power or rotation speed of the centrifugal fan 3) and / or the negative oxygen ion concentration generated by the negative oxygen ion generation module 1 (which can be replaced by the power parameter of the negative oxygen ion generation module 1), and then display it. For example, the greater the negative oxygen ion concentration generated by the negative oxygen ion generation module 1, under the same conditions, the greater the negative oxygen ion concentration displayed by the display component at a predetermined distance from the negative oxygen ion generator. When the air volume output by the centrifugal fan 3 is greater, the wind speed at the air outlet 22 of the housing 2 is higher, and the position that the air carrying negative oxygen ions can reach is farther. Under the same other conditions, the negative oxygen ion concentration at a greater distance from the negative oxygen ion generator can be increased.

[0087] As feasible, such as Figures 2 to 3As shown, a control component 8 can be provided on the housing 2, and the control component 8 can be used to control the on / off of the movable negative ion generator, the operating gear of the centrifugal fan 3, the gear of the negative ion generation module 1, etc. As an option, the control component 8 can be located in the middle of the outer wall of the first end 23 of the housing 2. For example, the control component 8 can be located in the middle of the outer wall of the end cap 29. When the operating gear of the centrifugal fan 3 is different, its power is different, and the corresponding air volume and air speed are different; when the gear of the negative ion generation module 1 is different, its power is different, and the corresponding negative ion concentration generated is different. Combining with the function of the display component, the user can know the negative ion concentration at a predetermined distance from the negative ion generator under different operating gears of the centrifugal fan 3 and different operating gears of the negative ion generation module 1. A power cord interface 7 can be provided on the housing 2. The power cord interface 7 can be located on the side wall of the housing 2. For example, the power cord interface 7 can be various existing different types of interfaces, such as Mini USB interface, Micro USB interface, Type-C interface, Lightning interface, terminal type interface, etc. Of course, the user can also change the predetermined distance from the movable negative ion generator through the control component 8, so as to know the negative ion concentration at different predetermined distances from the negative ion generator under different operating gears of the centrifugal fan 3 and different operating gears of the negative ion generation module 1; thereafter, the display component can display the centrifugal fan in different operating gears and / or the negative ion generation module in different operating gears and / or the negative ion concentration at different pre-stored predetermined distances from the negative ion generator after the movable negative ion generator is turned on.

[0088] All articles and references disclosed, including patent applications and publications, are incorporated herein by reference for various purposes. The term "consisting essentially of" describing a combination should include the identified elements, components, parts or steps and other elements, components, parts or steps that do not substantially affect the basic novel features of the combination. The use of the terms "comprising" or "including" to describe the combination of elements, components, parts or steps herein also contemplates embodiments consisting essentially of these elements, components, parts or steps. By using the term "can" herein, it is intended that any attribute described as "can" included is optional. Multiple elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step can be divided into separate multiple elements, components, parts or steps. The disclosure of "a" or "an" used to describe an element, component, part or step does not mean to exclude other elements, components, parts or steps.

[0089] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts among the embodiments can be referred to each other. The above embodiments are only for explaining the technical concept and features of the present invention, and their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A portable negative oxygen ion generator, characterized in that: include: A housing, wherein an air inlet and an air outlet are provided on the housing; A centrifugal fan is arranged in the housing, the outlet of the centrifugal fan faces the air outlet of the housing, and the inlet of the centrifugal fan is connected to the air inlet of the housing; When the centrifugal fan is in working state, air entering from the air inlet of the housing enters the centrifugal fan through the inlet of the centrifugal fan, and flows from the outlet of the centrifugal fan to the air outlet of the housing under the drive of the centrifugal fan; A negative oxygen ion generating module is arranged in the shell, and the negative oxygen ion generating module is used to generate negative oxygen ions in the air output from the impeller of the centrifugal fan and flow out from the air outlet of the shell together with the air discharged from the outlet of the centrifugal fan under the drive of the centrifugal fan.

2. The portable negative oxygen ion generator according to claim 1, characterized in that: A display component is arranged on the shell, and the display component is used to display the pre-stored negative oxygen ion concentration at a predetermined distance from the negative oxygen ion generator after the movable negative oxygen ion generator is turned on.

3. The portable negative oxygen ion generator according to claim 2, characterized in that: The predetermined distance is greater than or equal to 0 m and less than or equal to 1.5 m.

4. The portable negative oxygen ion generator according to claim 1, characterized in that: A flow channel is arranged between the outlet of the centrifugal fan and the air outlet, and the cross-sectional area of ​​the flow channel gradually increases along the direction from the outlet of the centrifugal fan to the air outlet of the shell.

5. The portable negative oxygen ion generator according to claim 1, characterized in that: The negative oxygen ion generator also includes a fragrance module, which is arranged inside the shell and located between the air inlet of the shell and the air outlet of the shell.

6. The portable negative oxygen ion generator according to claim 5, characterized in that: The fragrance module is arranged in a flow channel between the outlet of the centrifugal fan and the air outlet of the shell or at the air outlet of the shell.

7. The portable negative oxygen ion generator according to claim 1, characterized in that: The shell is cylindrical and includes a first end and a second end. The first end has an opening to form the air outlet. The air inlet is formed on a side wall of the shell.

8. The portable negative oxygen ion generator according to claim 7, characterized in that: The inlet of the centrifugal fan is arranged opposite to the air inlet of the shell.

9. The portable negative oxygen ion generator according to claim 8, characterized in that: The inlet of the centrifugal fan comprises a first inlet and a second inlet which are arranged opposite to each other, and the first inlet and the second inlet are both connected to the air inlet of the housing.

10. The portable negative oxygen ion generator according to claim 7, characterized in that: The air inlet of the shell and the centrifugal fan are both arranged near the second end of the shell.

11. The portable negative oxygen ion generator according to claim 7, characterized in that: The centrifugal fan comprises a volute and an impeller arranged in the volute, and an extending direction of a rotating shaft of the impeller is spatially perpendicular to an extending direction from the first end to the second end of the housing.

12. The portable negative oxygen ion generator according to claim 7, characterized in that: The second end of the housing has a bottom wall connected to the side wall.

13. The portable negative oxygen ion generator according to claim 4, characterized in that: The shell has a partition plate inside, and the flow channel is formed between the partition plate and the first part of the shell.

14. The portable negative oxygen ion generator according to claim 13, characterized in that: The partition includes a side plate portion and a bottom plate portion, wherein the side plate portion and the bottom plate portion are both connected to the side wall of the shell, and the bottom plate portion is provided with an opening matched with the outlet of the centrifugal fan.

15. The portable negative oxygen ion generator according to claim 14, characterized in that: The shell includes a first end and a second end, one end of the side plate portion is connected to the side wall close to the first end, and the other end of the side plate portion is connected to the bottom plate portion, and the area of ​​the bottom plate portion is smaller than the area of ​​the first end of the shell.

16. The portable negative oxygen ion generator according to claim 13, characterized in that: An installation cavity is formed between the partition and the second portion of the shell, and the centrifugal fan and at least a portion of the negative oxygen ion generating module are accommodated in the installation cavity.

17. The portable negative oxygen ion generator according to claim 14, characterized in that: The centrifugal fan is disposed between the bottom plate and the second end of the housing.

18. The portable negative oxygen ion generator according to claim 14, characterized in that: The bottom plate portion is parallel to the plane where the first end of the shell is located, and the side plate portion is extended as a whole along a preset direction from the first end of the shell to the second end of the shell and has an inclined angle with the preset direction.

19. The portable negative oxygen ion generator according to claim 5, characterized in that: The shell includes a first shell and a second shell which are nested with each other, and the air inlet includes a first air inlet arranged on the first shell and a second air inlet arranged on the second shell, and the first air inlet is communicated with the second air inlet.

20. The portable negative oxygen ion generator according to claim 19, characterized in that: The first air inlet and the second air inlet are arranged opposite to each other.

21. The portable negative oxygen ion generator according to claim 20, characterized in that: The first air inlet and the second air inlet are grid-like structures.

22. The portable negative oxygen ion generator according to claim 1, characterized in that: The release port of the negative oxygen ion generating module is located downstream of the outlet of the centrifugal fan and extends into the flow channel between the outlet of the centrifugal fan and the air outlet of the shell.

23. The portable negative oxygen ion generator according to claim 22, characterized in that: The negative oxygen ion generating module includes a shell and a negative oxygen ion generating electrode arranged in the shell, the shell includes an inlet and a release port, the inlet of the shell is located outside the flow channel, and the movable negative oxygen ion generator can ionize the air flowing into the inlet of the shell to generate negative oxygen ions and discharge them from the release port into the flow channel in a working state.

24. The portable negative oxygen ion generator according to claim 1, characterized in that: A flow channel is provided between the outlet of the centrifugal fan and the air outlet, and a cross-sectional area of ​​the flow channel close to the air outlet is larger than a cross-sectional area of ​​the flow channel close to the outlet of the centrifugal fan.

25. The portable negative oxygen ion generator according to claim 4 or 24, characterized in that: The release port of the negative oxygen ion generating module is arranged close to the outlet of the centrifugal fan.

26. The portable negative oxygen ion generator according to claim 1, characterized in that: The release port of the negative oxygen ion generating module is located in the volute of the centrifugal fan.

27. The portable negative oxygen ion generator according to claim 6, characterized in that: The rate of change of the cross-sectional area of ​​the portion of the flow channel close to the outlet of the centrifugal fan is smaller than the rate of change of the cross-sectional area of ​​the portion of the flow channel close to the air outlet.

28. The portable negative oxygen ion generator according to claim 7, characterized in that: The air outlet includes at least one annular opening, and the air outlet direction of the annular opening forms a preset angle with the axis of the negative oxygen ion generator.

29. The portable negative oxygen ion generator according to claim 28, characterized in that: The annular opening has at least two circles, and the air outlet directions of at least two circles of annular openings are different. Along the direction from inside to outside, the angle between the air outlet direction of the annular opening close to the outside and the axis is greater than the angle between the air outlet direction of the annular opening close to the inside and the axis.

30. The portable negative oxygen ion generator according to claim 2, characterized in that: The display component is used to display the negative oxygen ion concentrations of the centrifugal fan at different operating gears and / or the negative oxygen ion generating module at different operating gears and / or at different pre-stored predetermined distances from the negative oxygen ion generator after the movable negative oxygen ion generator is turned on.

31. The portable negative oxygen ion generator according to claim 30, characterized in that: The movable negative oxygen ion generator has a control component, which is used to adjust the gear of the centrifugal fan and / or the gear of the negative oxygen ion generating module and / or the predetermined distance from the negative oxygen ion generator. The display component displays the negative oxygen ion concentration according to the gear of the centrifugal fan and / or the gear of the negative oxygen ion generating module selected by the control component and / or the different predetermined distances selected from the negative oxygen ion generator.

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