A negative oxygen ion generator

Abstract

This utility model discloses a negative ion generator, relating to the technical field of negative ion manufacturing equipment. The negative ion generator includes: a water-containing basin with a negative ion output port on its side wall, and the bottom of the basin for storing water; a support body disposed within the water-containing basin, the support body having a central hole, and several grid plates arranged circumferentially along the lower end face of the central hole, the space where the grid plates are located communicating with the negative ion output port; an impeller rotatably mounted on the bottom of the support body, the blades of the impeller extending at an angle to the radial direction of the impeller; a water inlet hole in the middle of the impeller connecting to the upper end of a water suction pipe, the lower end of which extends below the liquid surface at the bottom of the water-containing basin; and a rotary power device whose output end is connected to the impeller for driving the impeller to rotate. When the impeller rotates to generate negative pressure, the water suction pipe can draw water from the bottom of the water-containing basin to the impeller and throw it towards the grid plates, forming a high concentration of negative ions. The generator is highly efficient and has a simple structure.

Description

Technical Field

[0001] This utility model relates to the technical field of negative oxygen ion manufacturing equipment, and more specifically, to a negative oxygen ion generator. Background Technology

[0002] A negative ion generator is a device that generates negative air ions. It typically works by simulating natural phenomena such as lightning or the impact of a waterfall, using high-pressure air to impact a liquid, causing oxygen molecules in the air to gain electrons and form negatively charged ions. These negative ions can adsorb and settle dust, bacteria, and other tiny particles in the air, thus purifying the air and improving environmental comfort. However, as the application scenarios for negative ion generators increase, while using an air compressor to create high-pressure air can produce a larger number of negative ions, it significantly impacts the size and weight of the device. The weight and footprint of the air compressor and other related structures limit the use of negative ion generators.

[0003] In conclusion, how to provide a negative ion generator that avoids the use of an air compressor is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a negative ion generator that can provide a high concentration of negative ions, and has high working efficiency, simple structure, small space occupation, and low cost, especially contributing to the improvement of working efficiency of small and medium-sized negative ion generators.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A negative oxygen ion generator, comprising:

[0007] A water-containing basin with a negative oxygen ion output port on its side wall, and the bottom of the water-containing basin is used to store water;

[0008] A support body is disposed in the water container. The support body has a central hole. Several grid plates are arranged on the lower end face of the central hole along the circumference of the central hole. The space where the grid plates are located is connected to the negative oxygen ion output port.

[0009] An impeller is rotatably mounted on the bottom of the support body, and the blades of the impeller extend at an angle to the radial direction of the impeller; the middle part of the impeller has a water inlet hole for connecting the upper end of the suction pipe, and the lower end of the suction pipe extends into the liquid surface at the bottom of the water container.

[0010] A rotary power device is provided, the output end of which is connected to the impeller to drive the impeller to rotate; when the impeller rotates to generate negative pressure, the suction pipe can draw water from the bottom of the water container to the impeller and throw it toward the grid plate.

[0011] Preferably, the impeller includes a base plate and blades, the base plate is provided with the water inlet hole, and the blades are arranged circumferentially around the water inlet hole.

[0012] Preferably, the blades are straight blades, and any two adjacent blades have the same angle with the radial direction of the impeller and the same deflection direction.

[0013] Preferably, the blade is a curved blade with a fixed curvature, and any two adjacent blades have the same curvature;

[0014] Alternatively, the blade may be a curved blade with variable curvature, wherein the curvature of the blade changes uniformly along the radial direction of the base plate.

[0015] Preferably, the suction pipe is a straight cylinder or an inverted trapezoid, and the upper end of the suction pipe has at least two water outlets. The water inlet hole is provided between any two blades, and the water outlet is connected to the water inlet hole. The suction pipe and the impeller are integrally formed.

[0016] Preferably, the support body and the grid plate are integrally formed, and each grid plate is perpendicular to the bottom of the support body.

[0017] Preferably, the bottom of the support body is a groove structure facing the bottom of the water-containing basin, the grid plate is located on the inner bottom surface of the groove structure, the central hole is located in the middle of the groove structure, and the impeller is located in the groove structure;

[0018] It also includes a limiting plate for limiting the axial position of the impeller, the limiting plate having a through hole for the suction pipe to pass through, and the limiting plate being detachably connected to the bottom of the support body by a connector;

[0019] In the installed state, the limiting plate and the bottom end of the support body have a first gap so that negative oxygen ions at the grid plate can overflow to the negative oxygen ion output port.

[0020] Preferably, the limiting plate is provided with a limiting plate water inlet hole, which is used to guide the unbroken water droplets back to the bottom of the water container.

[0021] The support body is placed in the water container when connected to the limiting plate, and the upper port of the water container is sealed. The outer periphery of the limiting plate fits against the inner wall of the water container to divide the inner cavity of the water container into an upper cavity and a lower cavity. The support body is located in the upper cavity, and the lower part of the water suction pipe passes through the through hole and is located in the lower cavity.

[0022] Preferably, the rotating power device is an electric motor, the rotating power device is mounted to the support body via a first bearing, and the impeller is mounted to the support body via a second bearing.

[0023] Preferably, the support body and the limiting plate are connected by screws.

[0024] The negative ion generator provided by this utility model can achieve high-intensity rotation speed by employing a high-speed rotating power device, thereby creating a siphon effect within the water suction pipe. Water is then flung out by the impeller and impacts the grid plate to generate negative ions. This saves space by eliminating the need for an air compressor, reduces overall weight, and, through the high rotation speed, improves the efficiency of negative ion generation. For example, after reaching a certain rotation speed, the concentration of negative ions can be significantly increased to a higher order of magnitude. The negative ion generator provided by this application can provide a high concentration of negative ions, has high working efficiency, a simple structure, small footprint, and low cost, making a significant contribution to improving the working efficiency of small and medium-sized negative ion generators. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of the negative oxygen ion generator provided in an embodiment of the present invention.

[0027] Figure 2 This is a front sectional view of the negative oxygen ion generator provided in an embodiment of the present invention.

[0028] Figure 3 This is a side sectional view of the negative oxygen ion generator provided in an embodiment of the present invention.

[0029] Figure 4 This is a three-dimensional sectional view of the negative oxygen ion generator provided in an embodiment of the present utility model.

[0030] Figure 5This is a schematic diagram of the structure of the support provided in an embodiment of the present utility model.

[0031] Figure 6 This is a structural schematic diagram of the support body provided in an embodiment of the present invention from another angle.

[0032] Figure 7 This is a front sectional view of the support provided in an embodiment of the present utility model.

[0033] Figure 8 This is a three-dimensional sectional view of the support provided in an embodiment of the present utility model.

[0034] Figure 9 This is a schematic diagram of the impeller and suction pipe provided in an embodiment of the present utility model.

[0035] Figure 10 This is a schematic diagram of the impeller and suction pipe from another angle, provided in an embodiment of the present invention.

[0036] Figure 11 This is a top view of the impeller provided in an embodiment of the present invention.

[0037] Figure 12 This is a cross-sectional view of the impeller and suction pipe provided in an embodiment of the present invention.

[0038] Figure 13 This is a perspective sectional view of the impeller and suction pipe provided in an embodiment of the present utility model.

[0039] Figure 14 This is a schematic diagram of the rotating power device provided in an embodiment of the present invention.

[0040] Figure 15 This is a schematic diagram of the structure of the limiting member provided in an embodiment of the present utility model.

[0041] Figure 16 This is a structural schematic diagram of the limiting member provided in an embodiment of the present utility model from another angle.

[0042] Figure 17 This is a cross-sectional view of the limiting member provided in an embodiment of the present utility model.

[0043] Figures 1-17 middle:

[0044] 1 is the water container, 2 is the support body, 3 is the impeller, 4 is the suction pipe, 5 is the rotation power device, and 6 is the limiting plate;

[0045] 11 is the negative oxygen ion output port, 12 is the upper cavity, and 13 is the lower cavity;

[0046] 21 is the central hole, 22 is the grille, 23 is the air inlet, 24 is the groove structure, 25 is the first gap, and 26 is the mounting part;

[0047] 31 is the blade, 32 is the base plate, 33 is the water inlet, and 34 is the receiving end;

[0048] 41 is the water outlet;

[0049] 51 is the first bearing, 52 is the second bearing, and 53 is the output end;

[0050] 61 is a through hole, and 62 is a water inlet hole for the limiting plate. Detailed Implementation

[0051] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0052] The core of this invention is to provide a negative ion generator that can provide a high concentration of negative ions, has high working efficiency, simple structure, small space occupation, and low cost, and in particular contributes to improving the working efficiency of small and medium-sized negative ion generators.

[0053] Please refer to Figure 1 , Figure 2 and Figure 3 This application provides a negative oxygen ion generator, including a water-containing basin 1, a support body 2, an impeller 3, and a rotational power device 5.

[0054] The water-receiving basin 1 is a basin structure used to store water and also to house the support 2, impeller 3, and rotating power device 5. Specifically, the bottom of the water-receiving basin 1 is used to store water. The water-receiving basin 1 has an open top structure, and the support 2, impeller 3, and rotating power device 5 can be located inside it to generate negative oxygen ions. The side wall of the water-receiving basin 1 is provided with a negative oxygen ion output port, so that the negative oxygen ions generated inside the water-receiving basin 1 can be output to the outside through the negative oxygen ion output port 11.

[0055] The support body 2 is located inside the water-containing basin 1 and is used to support the impeller 3 and the rotating power device 5. Because the impeller 2 and the rotating power device 5 need to rotate, the support body 2 has a central hole 21. Several grid plates 22 are arranged along the circumference of the lower end face of the central hole 21. The space where the grid plates 22 are located is connected to the negative oxygen ion output port 11. It should be noted that the function of the grid plates 22 is to receive the water thrown out by the impeller 3. Due to the large impact force of the water, when the high-speed splashing water hits the grid plates 22, it will form small water molecules, thereby generating negative oxygen ions.

[0056] The impeller 3 is rotatably mounted on the bottom of the support body 2. The blades 31 of the impeller 3 extend at an angle to the radial direction of the impeller 3. The middle part of the impeller 3 has a water inlet 33 that connects to the upper end of the suction pipe 4. The lower end of the suction pipe 4 extends into the liquid surface at the bottom of the water container 1.

[0057] Compared to the traditional blade 31, the blade 31 of this application has an angle with the radial direction of the impeller 3, forming a blade 31 that deviates from the radial direction. When the impeller 3 is controlled to rotate by the high-speed rotating power device 5, it can form a higher speed of water flow centrifugal force in coordination with the rotation speed of the rotating power device 5, thereby generating more negative oxygen ions and improving the generation efficiency of negative oxygen ions. For example, when the rotation speed is above 10,000 revolutions per minute, the concentration of negative oxygen ions can reach millions or more.

[0058] In addition, during the rotation of impeller 3, the airflow at the position of blade 31 will move outward due to centrifugal force, thus the air pressure at the center of impeller 3 will decrease, resulting in a siphon effect on the suction pipe 4, which will draw the water at the lower end of the suction pipe 4 upward and to the upper end of the suction pipe 4, that is, the middle of impeller 3. At this time, the rotating impeller 3 will centrifuge the water drawn up, so that the water is thrown out by centrifugal force and finally thrown to the grid plate 22.

[0059] The output end 53 of the rotating power device 5 is connected to the impeller 3, specifically to the receiving end 34 of the impeller 3. The receiving end 34 can be a mounting hole, used to drive the impeller 3 to rotate. When the impeller 3 rotates to generate negative pressure, the suction pipe 4 can draw water from the bottom of the water container 1 to the impeller 3 and throw it towards the grid plate 22. Since the space where the grid plate 22 is located is connected to the negative oxygen ion output port 11, the negative oxygen ions generated at the grid plate 22 can smoothly overflow to the negative oxygen ion output port 11.

[0060] The negative ion generator provided in this application uses a rotary power device 5 to control the rotation of the impeller 3, generating negative pressure that acts on the water suction pipe 4 to draw water from the lower part to the impeller 3. The rotation applies centrifugal force to the water, causing it to be thrown against the grid plate 22, where it impacts and forms negative oxygen ions. These negative oxygen ions are then output through the negative ion output port 12. Because the impeller 3 uses blades 31 that are offset radially, the thrown water is better aligned with the grid plate 22, generating a large number of negative oxygen ions.

[0061] Compared to the existing technology that uses an air compressor to generate gas to impact water, the negative ion generator provided in this application can achieve a high rotational speed by using a high-speed rotating power device 5, thereby creating a siphon effect in the water suction pipe 4. Then, the impeller 3 throws water out to impact the grid plate 22 to generate negative ions. This saves space for setting up an air compressor, reduces the overall weight, and improves the efficiency of negative ion generation through the high rotational speed. For example, with a rotational speed of over 10,000 revolutions per minute, the concentration of negative ions can reach millions or more.

[0062] The negative ion generator provided in this application can provide a high concentration of negative oxygen ions, and has high working efficiency, simple structure, small space occupation, and low cost. In particular, it has made a significant contribution to improving the working efficiency of small and medium-sized negative oxygen ion generators.

[0063] In one specific embodiment, the support body 2 is a cylindrical structure, which may have a stepped central hole 21 for mounting the rotary power device 5. The cylindrical structure includes the aforementioned grid plate 22, and the lower part of the support body 2 is used to mount the impeller 3. The impeller 3 and the grid plate 22 are located at the same axial position as the central hole 21, thereby ensuring that the centrifugal water droplets of the impeller 3 can be thrown onto the grid plate 22.

[0064] Optionally, an air inlet 23 is provided on the upper part of the support body 2. This device is a structure that forms negative oxygen ions in the internal water through siphon action and discharges the negative oxygen ions through the outlet. In order to ensure the stability of the overall air pressure, a passive air supply structure is required. If this structure is set on the water container, it is easy to cause the negative oxygen ions to mix with the air. Therefore, the air inlet 23 can be set between the cross gap between the rotating power device and the support body, from the outside of the rotating power device, from top to bottom, along the shaft diameter, directly to the center area of ​​the impeller. It is about 5mm away from the siphon port.

[0065] Based on the above embodiment, the impeller 3 includes a base plate 32 and blades 31. The base plate 32 is provided with a water inlet hole 33, and a plurality of blades 31 are arranged circumferentially around the water inlet hole 33.

[0066] It should be noted that the impeller in this application is mainly used to guide the water flow and provide centrifugal force for the water flow, requiring the base plate 32 to provide guiding support for the water flow. The water inlet hole 33 provided on the base plate 32 is used to connect the suction pipe 4, so that when the impeller 3 rotates and causes the air pressure in the middle (i.e., at the root of the blades) to decrease, the air pressure in the upper part of the suction pipe 4 can also decrease, thereby causing the suction pipe 4 to produce a siphon effect. In this embodiment, the blades 31 are arranged around the water inlet hole, which can be used to accurately provide the negative pressure effect at the root of the blades 31 to the water inlet hole 33, thereby accurately causing the suction pipe 4 to perform a siphon effect.

[0067] Optionally, there may be one water inlet hole 33, and the center line of the water inlet hole 33 may or may not be collinear with the center line of the impeller 3. The water inlet hole 33 is located in the middle of the base plate 32, which allows the suction pipe 4 to be located in the middle of the base plate 32, thereby preventing the suction pipe 4 from rotating too much when the impeller 3 rotates.

[0068] Based on any of the above embodiments, the blade 31 is a straight blade, and any two adjacent blades 31 have the same radial angle with the impeller 3 and the same deflection direction.

[0069] It should be noted that straight blades include flat blades or airfoil blades. When blade 31 is a straight blade, the blade root is taken as the starting point of the extension direction of blade 31, and the blade edge is taken as the ending point of the extension direction of blade 31. The length of blade 31 is from the starting point to the ending point. The length direction of blade 31 makes an angle with the radial direction of the starting point, or deflection angle. In the circumferential direction of the impeller, the deflection direction of blade 31 is the same, that is, all blades 31 deflect in a counterclockwise (or clockwise) direction relative to their own starting point along the impeller. In other words, any two adjacent blades have the same deflection direction, i.e., the same rotation direction.

[0070] For straight blades, the grid plates 22 on the support 2 can be in a one-to-one correspondence or a non-one-to-one correspondence manner. Optionally, the grid plates 22 are evenly arranged in the circumferential direction, so that when the impeller 3 rotates, it can obtain a greater centrifugal force than the curved blades, which accelerates the impeller towards the grid plates 22, thereby obtaining a large amount of relatively uniform negative oxygen ion concentration.

[0071] Optionally, the deflection angles of several grid plates 22 arranged circumferentially on the bottom surface of the support 2 relative to the central hole 21 are the same. That is, in order for the grid plates 22 to receive water droplets thrown out by the centrifugal force of the blades 31 with the maximum surface area, the grid plates 22 need to be as directly opposite the direction in which the water droplets are thrown out as possible. If the angles and shapes of several blades 31 in the circumferential direction are the same, then the several grid plates 22 in the circumferential direction need to have the same angle.

[0072] Optionally, the grid plate 22 can be a straight plate, preferably a straight plate perpendicular to the corresponding blade 31. It should be noted that the "correspondence" mentioned here should be understood as having a corresponding vertical blade in the non-rotating state, or in the rotating state, the blade 31 corresponding to the water droplet received by the grid plate 22 is the corresponding blade. In actual production, this correspondence is also related to the rotational speed of the impeller 3 driven by the rotating power device and the size of the blade 31.

[0073] Optionally, the grid plate 22 can be a convex plate protruding towards the blade 31. The convex plate makes it easier to contact the centrifugal water droplets and has an outward splashing angle, thereby obtaining more negative oxygen ions. Specifically, the grid plate 22 is an arc-shaped plate or a spherical plate.

[0074] Optionally, the grid plate 22 can be a panel with a complex surface, such as a sawtooth surface or a stepped surface. The purpose of setting the panel shape is to maximize the contact and impact with the centrifugal water droplets, thereby generating more negative oxygen ions.

[0075] Based on any of the above embodiments, the blade 31 is a curved blade with a fixed curvature, and any two adjacent blades have the same curvature.

[0076] Alternatively, blade 31 may be a curved blade with variable curvature, and the curvature of blade 31 changes in the same direction along the radial direction of the base plate.

[0077] It should be noted that curved blades include circular arc blades, flat curved blades, etc.

[0078] The aforementioned curved blades are characterized by a change in the line connecting the blade root to the blade edge along the blade's length. These include forward-curved blades and backward-curved blades. The former has a higher absolute outlet velocity and circumferential velocity, resulting in the greatest work done by impeller 3 on the fluid, but also greater flow losses, especially at higher circumferential velocities in impeller 3, which can easily lead to significant flow losses and potentially reduce overall efficiency. The latter has lower absolute outlet velocity and circumferential velocity, resulting in less flow loss and thus higher stage efficiency. The backward-curved blade compressor stage achieves pressure increase within impeller 3, where flow losses are lower, leading to higher overall efficiency. Therefore, it is suitable for applications requiring high efficiency, especially at higher circumferential velocities in impeller 3, where it can maintain high stage efficiency. For the aforementioned curved blades, the grid plates also need to be aligned with the direction of water droplet ejection, allowing the water droplets to generate a large number of negative oxygen ions upon impact with the grid plates.

[0079] Based on any of the above embodiments, the support body 2 and the grid plate 22 are integrally formed, and each grid plate 22 is perpendicular to the bottom of the support body 2. The integrally formed structure facilitates manufacturing and ensures the stability of the grid plate 22, preventing it from deflecting or changing position due to water droplet impact.

[0080] Optionally, the aforementioned one-piece molded structure can be manufactured using other methods such as 3D printing or casting.

[0081] Based on any of the above embodiments, the bottom of the support body 2 is a groove structure 24 facing the bottom of the water container 1, the grid plate 22 is located on the inner bottom surface of the groove structure 24, the central hole 21 is located in the middle of the groove structure 24; the impeller 3 is located in the groove structure 24; it also includes a limiting plate 6 for limiting the axial position of the impeller 3, the limiting plate 6 has a through hole 61 for the water suction pipe 4 to pass through, and the limiting plate 6 is detachably connected to the mounting part 26 at the bottom of the support body 2 by a connector; optionally, the connector can be a screw, bolt, clamp or other mounting structure;

[0082] When the limiting plate 6 is installed, there is a first gap 25 between the limiting plate 6 and the bottom end of the support body 2, so that the negative oxygen ions at the grid plate 22 can overflow to the negative oxygen ion output port 11.

[0083] Based on any of the above embodiments, the limiting plate 6 is provided with a limiting plate water inlet 62. The limiting plate water inlet 62 is used to guide the unbroken water droplets back to the bottom of the water container 1. It is a connecting structure that connects the space where the blade 31 is located and the water storage space at the bottom of the water container 1. It is used to allow excess water droplets on the bottom plate 32 that have not formed negative oxygen ions to return to the water storage space. Optionally, there may be other gaps or channels for water return between the support body 2 and the impeller 3.

[0084] Based on any of the above embodiments, the support body 2 is placed in the water container 1 while connected to the limiting plate 6, and the upper port of the water container 1 is sealed. The outer periphery of the limiting plate 6 is attached to the inner wall of the water container 1 to divide the inner cavity of the water container 1 into an upper cavity 12 and a lower cavity 13. The support body 2 is located in the upper cavity 12, and the lower part of the water suction pipe 4 passes through the through hole 61 and is located in the lower cavity 13.

[0085] Based on any of the above embodiments, the rotating power device 5 is an electric motor, and the rotating power device 5 is mounted to the support body 2 via a first bearing 51, while the impeller 3 is connected to the support body 2 via a second bearing 52. Using bearings to mount the motor facilitates accurate motor positioning and ensures that the motor does not deviate from its axis during operation.

[0086] Based on any of the above embodiments, the suction pipe 4 and the impeller 3 are integrally formed, which can eliminate the gap between the suction pipe 4 and the impeller 3, and generate a more stable and efficient siphon effect. Considering that the impeller 3 is driven to rotate by the rotary power device 4 in this application, the suction pipe 4 will also be driven to rotate. Based on this, the suction pipe 4 can be set at the rotation center of the impeller 3 and integrally formed with the impeller 3.

[0087] Based on any of the above embodiments, the suction pipe 4 is either cylindrical or trapezoidal, and its upper end has at least two outlets 41. A water inlet 33 is provided between any two blades 31, and the outlets 41 and the water inlet 33 are correspondingly connected. The suction pipe 4 and the impeller 3 are integrally formed. Optionally, considering that the suction pipe 4 needs to rotate, it can be configured as a cylindrical structure or an inverted trapezoidal structure (similar to a cone). Compared to other types of tubular structures, the inverted trapezoidal suction pipe can ensure a good rotation centerline, reducing unnecessary rotational inertia or increasing the load.

[0088] In addition to the main structure and connection relationship of the negative ion generator provided in the above embodiments, the structure of other parts of the negative ion generator can be found in the prior art, and will not be described in detail here.

[0089] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0090] The negative ion generator provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that those skilled in the art can make several improvements and modifications to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A negative oxygen ion generator, characterized in that, include: A water-containing basin (1) is provided with a negative oxygen ion output port (11) on its side wall, and the bottom of the water-containing basin (1) is used to store water; A support body (2) is provided inside the water container (1). The support body (2) has a central hole (21). Several grid plates (22) are provided on the lower end face of the central hole (21) along the circumference of the central hole (21). The space where the grid plates (22) are located is connected to the negative oxygen ion output port (11). An impeller (3) is rotatably mounted on the bottom of the support (2). The blades (31) of the impeller (3) extend at an angle to the radial direction of the impeller (3). The middle part of the impeller (3) has a water inlet (33) that connects to the upper end of the suction pipe (4). The lower end of the suction pipe (4) extends into the liquid surface at the bottom of the water container (1). A rotating power device (5) is connected to the impeller (3) at its output end to drive the impeller (3) to rotate. When the impeller (3) rotates to generate negative pressure, the water suction pipe (4) can draw water from the bottom of the water container (1) to the impeller (3) and throw it toward the grid plate (22).

2. The negative oxygen ion generator according to claim 1, characterized in that, The impeller (3) includes a base plate (32) and blades (31). The base plate (32) is provided with water inlet holes (33), and the blades (31) are arranged circumferentially around the water inlet holes (33).

3. The negative oxygen ion generator according to claim 2, characterized in that, The blade (31) is a straight blade, and any two adjacent blades (31) have the same radial angle with the impeller (3) and the same deflection direction.

4. The negative oxygen ion generator according to claim 2, characterized in that, The blade (31) is a curved blade with a fixed curvature, and any two adjacent blades (31) have the same curvature; Alternatively, the blade (31) is a curved blade with variable curvature, and the curvature of the blade (31) changes in the same direction along the radial direction of the base plate (32).

5. The negative oxygen ion generator according to claim 2, characterized in that, The suction pipe (4) is a straight cylinder or an inverted trapezoidal shape, and the upper end of the suction pipe (4) has at least two water outlets (41). The water inlet (33) is provided between any two blades (31), and the water outlet (41) is connected to the water inlet (33). The suction pipe (4) and the impeller (3) are integrally formed.

6. The negative oxygen ion generator according to any one of claims 1 to 5, characterized in that, The support body (2) and the grid plate (22) are integrally formed, and each grid plate (22) is perpendicular to the bottom of the support body (2).

7. The negative oxygen ion generator according to claim 6, characterized in that, The bottom of the support (2) is a groove structure (24) facing the bottom of the water container (1), the grid plate (22) is located on the inner bottom surface of the groove structure (24), the central hole (21) is located in the middle of the groove structure; the impeller (3) is located in the groove structure. It also includes a limiting plate (6) for limiting the axial position of the impeller (3), the limiting plate (6) having a through hole (61) through which the suction pipe passes, and the limiting plate (6) being detachably connected to the bottom of the support (2) by means of a connector; In the installed state, the limiting plate (6) and the bottom end of the support body (2) have a first gap (25) so that the negative oxygen ions at the grid plate (22) can overflow to the negative oxygen ion output port (11).

8. The negative oxygen ion generator according to claim 7, characterized in that, The limiting plate (6) is provided with a limiting plate water inlet hole (62), which is used to guide the unbroken water droplets back to the bottom of the water container (1); The support (2) is placed in the water container (1) while connected to the limiting plate (6), and the upper port of the water container (1) is sealed. The outer periphery of the limiting plate (6) is in contact with the inner wall of the water container (1) to divide the inner cavity of the water container (1) into an upper cavity (12) and a lower cavity (13). The support (2) is located in the upper cavity (12), and the lower part of the water suction pipe (4) passes through the through hole (61) and is located in the lower cavity (13).

9. The negative oxygen ion generator according to claim 8, characterized in that, The rotating power device (5) is an electric motor. The rotating power device (5) is installed with the support body (2) through a first bearing (51), and the impeller (3) is installed with the support body (2) through a second bearing (52).

10. The negative oxygen ion generator according to claim 8, characterized in that, The support (2) is connected to the limiting plate (6) by screws.

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