Negative ion air purification circulating fan

Abstract

The application relates to the technical field of negative ion purification, in particular to a negative ion air purification circulating fan, which comprises a shell, a first impeller, a second impeller and a negative ion generator. The negative ion air duct is arranged in the annular common air duct in a nested mode, the annular airflow generated by the common air duct is used for wrapping and guiding the central negative ion airflow to be directional and remotely transported, the first impeller and the second impeller are synchronously driven, and the flow and speed of the two airflows are synchronously controlled, so that the problems of limited purification range and low efficiency caused by the too fast diffusion of negative ions in the traditional design are solved.

Description

Technical Field

[0001] This invention relates to the field of negative ion purification technology, specifically to a negative ion air purification and circulation fan. Background Technology

[0002] Currently, most air circulators on the market focus on promoting indoor air circulation and achieving temperature balance, but their functions are mostly limited to physically agitating airflow and lack active air purification capabilities. Although some products attempt to incorporate negative ion generators to improve air quality, these designs typically place the negative ion generator simply near the fan's air inlet or outlet. The released negative ion stream lacks effective guidance and protection at the outlet and is prone to rapid diffusion and attenuation due to charge repulsion and air resistance, resulting in a very limited effective purification radius and making it difficult to produce a uniform and lasting purification effect on the entire room.

[0003] In addition, if an uncontrolled flow of negative ions is blown directly onto the human body, it may cause local static electricity or dryness and discomfort. Furthermore, if the negative ion generator also produces trace amounts of ozone, users may also be at risk of direct inhalation.

[0004] Therefore, existing technologies have not yet been able to efficiently, directionally, and safely deliver negative ions to distant spaces and organically combine them with indoor air circulation. This is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] To address the problems existing in the prior art, a negative ion air purifying circulating fan is provided. By nesting negative ion air ducts within a coaxially arranged annular ordinary air duct, the annular airflow generated by the ordinary air duct wraps around and guides the central negative ion airflow for directional and long-distance delivery. Simultaneously, a first impeller and a second impeller are set up for synchronous drive, and the flow rate and speed of the two airflows are controlled synchronously. This solves the problem of limited purification range and low efficiency caused by the excessively rapid diffusion of negative ions in traditional designs.

[0006] To address the problems of existing technologies, this invention provides a negative ion air purifying circulating fan, comprising: a housing containing a negative ion air duct and a regular air duct; the air outlets of the negative ion air duct and the regular air duct are located at the front end of the housing, and the air inlets of the negative ion air duct and the regular air duct are located at the rear end of the housing; the air outlet of the regular air duct is annular and arranged around the outer periphery of the air outlet of the negative ion air duct, so that the two airflows remain coaxial in the airflow direction and the negative ion airflow is enveloped by the regular airflow; a first impeller is disposed in the negative ion air duct; a second impeller is disposed in the regular air duct; a negative ion generator is disposed in the negative ion air duct; and a rotary drive mechanism is disposed in the housing, and its output shaft is drivenly connected to the first and second impellers.

[0007] Preferably, it further includes a sealed housing disposed inside the casing, the sealed housing dividing its internal space into an ion inlet chamber near the front end of the casing and an ion outlet chamber near the rear end of the casing; the front opening of the sealed housing constitutes the outlet of the negative ion air duct, the annular space between the outer side of the opening and the inner wall of the casing constitutes the outlet of the ordinary air duct, and a guide plate with an arc-shaped outer end is provided at the front opening of the sealed housing; the first impeller is disposed between the ion inlet chamber and the ion outlet chamber.

[0008] Preferably, a partition shell is further provided inside the housing, which, together with the inner wall of the housing, forms an annular air duct surrounding the sealed housing. This annular air duct constitutes the air outlet of the ordinary air duct. An ordinary air inlet is provided on the side of the partition shell facing the rear end of the housing. The second impeller is disposed at the ordinary air inlet. An ion air inlet channel is provided on the partition shell to connect the annular air duct with the ion air inlet chamber. The negative ion generator is disposed at the ion air inlet channel.

[0009] Preferably, the rotary drive mechanism includes a dual-shaft motor disposed within the housing, with its two output shafts coaxially connected to the first impeller and the second impeller, respectively.

[0010] Preferably, a filter screen is provided at the rear end of the casing, and outside air enters the negative ion air duct and the ordinary air duct after passing through the filter screen.

[0011] Preferably, it further includes a base; the housing is connected to the base via a rotating connection mechanism, the rotation axis of which is parallel to the horizontal plane, so that the housing can be adjusted in pitch relative to the base; the base is also provided with a pitch drive assembly for driving the housing to rotate around the axis of the rotating connection mechanism.

[0012] Preferably, the pitch drive assembly includes: an arc-shaped rack disposed on the inner wall of the housing; a pitch drive motor disposed in the base, the output shaft of which extends obliquely upward into the housing; and a pitch drive gear coaxially disposed on the output shaft of the pitch drive motor and meshing with the arc-shaped rack.

[0013] Preferably, the base includes: a base with a rotation drive mechanism disposed therein; a rotating seat coaxially rotatably disposed on the base and connected to the rotation drive mechanism for transmission; and a pitch drive assembly disposed in the rotating seat.

[0014] Preferably, the rotation drive mechanism includes: a fixed gear, coaxially fixedly disposed at the top of the base; a rotation drive motor, fixedly disposed at the bottom of the rotating disk, with its output shaft extending downward; and a drive gear, coaxially fixedly disposed on the output shaft of the rotation drive motor, the drive gear meshing with the fixed gear.

[0015] Preferably, the rear end of the housing is provided with an arc-shaped guide groove extending along the arc-shaped rack, and the base is provided with a slider extending into the arc-shaped guide groove and slidingly engaging with it.

[0016] The advantages of this application compared to the prior art are:

[0017] This application utilizes a coaxial nested air duct design to wrap around and guide the negative ion airflow, solving the fundamental problems of small purification range and low efficiency of traditional negative ion fans. Specifically, it achieves the following effects: First, it enables remote and precise delivery of purifying agents. By confining the airflow, the effective range of negative ions is significantly extended, expanding the purification coverage. Second, it improves safety and comfort. The outer airflow forms a physical barrier between the user and the negative ion flow, preventing dryness or static discomfort that may result from direct contact with high-concentration ion flow, while effectively diluting and isolating trace byproducts that may be generated during operation. Third, it enhances overall air circulation and purification efficiency. The dual air ducts work together to achieve both targeted purification and promote large-scale indoor air circulation, achieving a highly efficient unity of "local deep purification" and "global uniform circulation," significantly improving the product's practical value and user experience. Attached Figure Description

[0018] Figure 1 This is a perspective view of a negative ion air purifying and circulating fan according to the present invention from a first-view perspective.

[0019] Figure 2 This is a perspective view of a negative ion air purifying and circulating fan of the present invention from a second perspective.

[0020] Figure 3 This is a three-dimensional cross-sectional view of a negative ion air purifying and circulating fan according to the present invention.

[0021] Figure 4 This is a schematic diagram of the airflow of a negative ion air purifying circulating fan according to the present invention.

[0022] Figure 5 This is an exploded perspective view of the casing of a negative ion air purifying and circulating fan according to the present invention.

[0023] Figure 6 This is a schematic diagram of the casing of a negative ion air purifying and circulating fan according to the present invention.

[0024] Figure 7 This is a schematic diagram of the separator housing and the sealing housing in a negative ion air purifying circulating fan according to the present invention.

[0025] Figure 8 This is an exploded perspective view of the base of a negative ion air purifying circulating fan according to the present invention.

[0026] Figure 9 This is a schematic diagram of the base of a negative ion air purifying circulating fan according to the present invention.

[0027] The diagram is labeled as follows: 1. Housing; 11. Negative ion air duct; 12. Ordinary air duct; 13. Sealed housing; 14. Separating housing; 141. Ion air inlet channel; 15. Drainage plate; 16. Filter screen; 17. Arc-shaped guide groove; 2. First impeller; 3. Second impeller; 4. Negative ion generator; 5. Rotary drive mechanism; 6. Base; 61. Base; 62. Rotating seat; 71. Arc-shaped rack; 72. Pitch drive motor; 73. Pitch drive gear; 81. Fixed gear; 82. Rotary drive motor; 83. Drive gear; 84. Slider. Detailed Implementation

[0028] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0029] like Figures 1 to 7 As shown, a negative ion air purifying circulating fan includes: a housing 1, which houses a negative ion air duct 11 and a regular air duct 12. The air outlets of the negative ion air duct 11 and the regular air duct 12 are located at the front end of the housing 1, and the air inlets of the negative ion air duct 11 and the regular air duct 12 are located at the rear end of the housing 1. The air outlet of the regular air duct 12 is annular and is arranged around the outer periphery of the air outlet of the negative ion air duct 11, so that the two airflows are coaxial in the airflow direction and the negative ion airflow is surrounded by the regular airflow; a first impeller 2 is disposed in the negative ion air duct 11; a second impeller 3 is disposed in the regular air duct 12; a negative ion generator 4 is disposed in the negative ion air duct 11; and a rotary drive mechanism 5 is disposed in the housing 1, and its output shaft is drivenly connected to the first impeller 2 and the second impeller 3.

[0030] During operation, the rotary drive mechanism 5 synchronously drives the first impeller 2 and the second impeller 3 to rotate. The first impeller 2 draws air into the negative ion duct 11, which then flows through the negative ion generator 4 to become a purified airflow rich in negative ions, and is ejected from the central air outlet. At the same time, the second impeller 3 draws air into the ordinary air duct 12, forming a clean airflow around the center, and is ejected from the annular air outlet.

[0031] The two airflows converge at the outlet. The central negative ion airflow is tightly enveloped by the surrounding ordinary airflow and constrained and guided by the air duct formed by the ordinary air. This allows it to overcome the repulsive force of charges and air resistance, and be directionally and centrally transported to the far end of the room. The outer clean airflow not only guides and protects the air, but also promotes the overall circulation of indoor air, ensuring that the purified air is fully mixed with the indoor air to be purified, achieving uniform purification throughout the house.

[0032] like Figures 4 to 7 As shown, it also includes a sealed housing 13 disposed inside the housing 1. The sealed housing 13 divides its internal space into an ion air inlet chamber near the front end of the housing 1 and an ion air outlet chamber near the rear end of the housing 1. The front opening of the sealed housing 13 constitutes the air outlet of the negative ion air duct 11. The annular space between the outer side of the opening and the inner wall of the housing 1 constitutes the air outlet of the ordinary air duct 12. A guide plate 15 with an arc-shaped outer end is provided at the front opening of the sealed housing 13. The first impeller 2 is disposed between the ion air inlet chamber and the ion air outlet chamber.

[0033] The negative ion air purifying circulating fan also includes a sealed housing 13 disposed inside the casing 1. The sealed housing 13 divides its internal space into an ion outlet chamber near the front end of the casing 1 and an ion inlet chamber near the rear end of the casing 1. The first impeller 2 is disposed between the ion inlet chamber and the ion outlet chamber. The front opening of the sealed housing 13 forms the outlet of the negative ion air duct 11, while the annular space between the outer side of this opening and the inner wall of the casing 1 forms the outlet of the ordinary air duct 12. A guide plate 15 is also disposed at the front opening of the sealed housing 13, and the outer end of the guide plate 15 is arc-shaped.

[0034] The sealed housing 13 further divides the interior of the negative ion duct 11 into inlet and outlet chambers, making the airflow path clearer. When the first impeller 2 is working, it draws in air from the ion inlet chamber, pressurizes it, and sends it into the ion outlet chamber, forming a stable and concentrated negative ion airflow. The arc-shaped guide plate 15 located at the outlet can guide and shape this central airflow, making its flow direction more concentrated and smoother, effectively reducing eddies and energy loss at the outlet, thereby further enhancing the "clustering" effect of the negative ion airflow. This allows the negative ion core flow, which is surrounded by ordinary airflow, to maintain a higher speed and a longer range.

[0035] like Figures 4 to 7 As shown, a partition shell 14 is also provided inside the housing 1, which together with the inner wall of the housing 1 forms an annular air duct surrounding the sealed housing 13. This annular air duct constitutes the air outlet of the ordinary air duct 12. An ordinary air inlet is provided on the side of the partition shell 14 facing the rear end of the housing 1. The second impeller 3 is provided at the ordinary air inlet. An ion air inlet channel 141 is provided on the partition shell 14 to connect the annular air duct with the ion air inlet chamber. The negative ion generator 4 is provided at the ion air inlet channel 141.

[0036] The negative ion air purifying circulating fan also includes a partition shell 14 inside its housing 1. This partition shell 14 and the inner wall of the housing 1 enclose a ring-shaped air duct surrounding the outer periphery of the sealed housing 13, which serves as the outlet of the ordinary air duct 12. An ordinary air inlet is located on the side of the partition shell 14 facing the rear end of the housing 1, and the second impeller 3 is positioned at this ordinary air inlet. Furthermore, an ion air inlet channel 141 is also provided on the partition shell 14, connecting the ring-shaped air duct to the ion air inlet chamber, and the negative ion generator 4 is positioned at this ion air inlet channel 141.

[0037] During operation, the second impeller 3 draws in air from the ordinary air inlet and pressurizes it before sending it into the annular air duct, ultimately forming an annular air curtain that surrounds the central airflow. Crucially, a portion of the air entering the annular air duct is guided to the ion inlet chamber of the sealed housing 13 via the ion inlet channel 141 on the partition housing 14. The negative ion generator 4 releases a high concentration of negative ions at this channel, fully ionizing this portion of air. Subsequently, this negative ion-rich air is drawn in and accelerated by the first impeller 2, and ejected from the central air outlet.

[0038] like Figure 4 As shown, the rotary drive mechanism 5 includes a dual-shaft motor installed in the housing 1, with its two output shafts coaxially connected to the first impeller 2 and the second impeller 3, respectively.

[0039] The dual-axis motor enables synchronous driving of the first impeller 2 and the second impeller 3. Its two output shafts directly drive the first impeller 2 located inside the sealed housing 13 and the second impeller 3 located at the ordinary air inlet of the partition housing 14, respectively. This coaxial direct-drive method ensures efficient and precise power transmission, allowing the central negative ion airflow and the surrounding enveloping airflow to be generated synchronously at a preset, stable speed and flow ratio, thus forming a stable coaxial enveloping airflow field.

[0040] like Figure 5 As shown, a filter screen 16 is provided at the rear end of the casing 1. After passing through the filter screen 16, outside air enters the negative ion air duct 11 and the ordinary air duct 12.

[0041] When the dual-shaft motor drives two sets of impeller systems to generate suction, outside air is first drawn into the rear end of the casing 1. Before entering the ordinary air inlet of the partition casing 14 and flowing through the ion air inlet channel 141 to the sealed casing 13, this air passes through the filter screen 16 located at the rear end of the casing 1. This filter screen 16 can effectively filter out larger particles, dust, hair, and other impurities in the air, providing a relatively clean air source for subsequent negative ion generation and airflow circulation. After filtration, part of the clean air enters the ordinary air duct 12 to form an enveloping airflow, while the other part enters the negative ion air duct 11 and is ionized, thus realizing a coordinated workflow of physical filtration followed by ion purification and circulation.

[0042] like Figures 6 to 9 As shown, it also includes a base 6; the housing 1 is connected to the base 6 through a rotating connection mechanism, the rotation axis of which is set parallel to the horizontal plane, so that the housing 1 can be adjusted in pitch angle relative to the base 6; the base 6 is also provided with a pitch drive assembly for driving the housing 1 to rotate around the axis of the rotating connection mechanism.

[0043] While achieving air purification and circulation functions, the base 6, rotating connection mechanism, and pitch drive component work together to provide flexible attitude adjustment capabilities. When the pitch drive component is working, it drives the casing 1 to rotate around the horizontal axis, thereby changing the direction of the air outlet of the casing 1 and achieving vertical adjustment of the air delivery angle. This allows users to precisely direct the coaxially wrapped purified airflow to the upper space of the room to promote overall circulation, or to directly deliver purified air to areas where people are active, greatly expanding the effective coverage range and application scenarios of the airflow.

[0044] like Figure 4 As shown, the pitch drive assembly includes: an arc-shaped rack 71 disposed on the inner wall of the housing 1; a pitch drive motor 72 disposed in the base 6, the output shaft of which extends obliquely upward into the housing 1; and a pitch drive gear 73 coaxially disposed on the output shaft of the pitch drive motor 72 and meshing with the arc-shaped rack 71.

[0045] When pitch angle adjustment is required, the pitch drive motor 72 starts, driving the pitch drive gear 73 to rotate. Since the pitch drive gear 73 meshes with the arc-shaped rack 71 fixed to the housing 1, the rotational motion of the pitch drive gear 73 is converted into an arc-shaped oscillation of the housing 1 relative to the base 6 around a horizontal axis, thus achieving precise and stable pitch angle adjustment. The output shaft of the pitch drive motor 72 is tilted upwards, providing a compact and efficient spatial path for the meshing transmission of the pitch drive gear 73 and the arc-shaped rack 71, allowing the drive mechanism to be efficiently integrated into the connection between the base 6 and the housing 1.

[0046] like Figure 8 and Figure 9 As shown, the base 6 includes: a base 61, in which a rotation drive mechanism is disposed; a rotating seat 62, which is coaxially rotatably disposed on the base 61 and is connected to the rotation drive mechanism for transmission; and a pitch drive assembly is disposed in the rotating seat 62.

[0047] The base 6 structure enables a combined horizontal rotation (oscillation) and vertical pitch movement of the housing 1. During operation, the rotation drive mechanism within the base 61 first drives the rotating seat 62 to rotate horizontally, thereby causing the housing 1 to oscillate left and right. Based on this, the pitch drive assembly (pitch drive gear 73 – arc rack 71 mechanism) located within the rotating seat 62 operates independently, driving the housing 1 to adjust its pitch angle. These two movements can occur independently or in coordination, allowing the air outlet of the housing 1 to perform a wide-range three-dimensional sweep, thus dynamically covering most of the room's space.

[0048] like Figure 8 and Figure 9 As shown, the rotation drive mechanism includes: a fixed gear 81, which is coaxially fixedly mounted on the top of the base 61; a rotation drive motor 82, which is fixedly mounted on the bottom of the rotating disk, with its output shaft extending downward; and a drive gear 83, which is coaxially fixedly mounted on the output shaft of the rotation drive motor 82, and the drive gear 83 meshes with the fixed gear 81.

[0049] When horizontal rotation (swinging) of the housing 1 is required, the rotation drive motor 82 at the bottom of the rotating base 62 is activated, driving the drive gear 83 on its output shaft to rotate. Since the drive gear 83 meshes with the fixed gear 81 fixed on the base 61, according to the principle of planetary gears, the rotation of the drive gear 83 will drive the entire rotating base 62 (along with its pitch drive assembly, housing 1 and all internal mechanisms) to rotate smoothly horizontally around the central axis of the base 61. This process is independent of the pitch drive, realizing the horizontal sweeping function.

[0050] like Figure 4 As shown, the rear end of the housing 1 is provided with an arc-shaped guide groove 17 extending along the arc-shaped rack 71, and the base 61 is provided with a slider 84 extending into the arc-shaped guide groove 17 and slidingly engaging with it.

[0051] The slider 84 and the arc-shaped guide groove 17 form an independent guiding and auxiliary support mechanism. During the pitch drive assembly (pitch drive gear 73 - arc-shaped rack 71 mechanism) driving the housing 1 to pitch, the arc-shaped guide groove 17 at the rear end of the housing 1 will slide relative to the slider 84 fixed on the base 61. This sliding pair bears part of the torque and load of the housing 1 during pitch, providing effective auxiliary support and motion guidance for the main drive gear rack pair, ensuring the accuracy and stability of the movement trajectory of the housing 1 during pitch, and preventing swaying or deviation.

[0052] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A negative ion air purifying and circulating fan, characterized in that, include: The casing contains a negative ion air duct and a regular air duct. The air outlets of the negative ion air duct and the regular air duct are located at the front end of the casing, and the air inlets of the negative ion air duct and the regular air duct are located at the rear end of the casing. The air outlet of the regular air duct is annular and is arranged around the outer periphery of the air outlet of the negative ion air duct, so that the two airflows are kept coaxial in the airflow direction and the negative ion airflow is surrounded by the regular airflow. The first impeller is located in the negative ion air duct; The second impeller is installed in the ordinary air duct; The negative ion generator is installed in the negative ion air duct; A rotary drive mechanism is housed in the casing and its output shaft is connected to the first and second impellers via a transmission. It also includes a sealed housing inside the casing, which divides its internal space into an ion inlet chamber near the front of the casing and an ion outlet chamber near the rear of the casing. The front opening of the sealed housing forms the air outlet of the negative ion air duct, and the annular space between the outer side of the opening and the inner wall of the housing forms the air outlet of the ordinary air duct. A flow guide plate with an arc-shaped outer end is provided at the front opening of the sealed housing. The first impeller is disposed between the ion inlet chamber and the ion outlet chamber; The casing is also provided with a partition shell, which together with the inner wall of the casing forms an annular air duct surrounding the sealed shell. This annular air duct constitutes the air outlet of the ordinary air duct. The partition shell is provided with an ordinary air inlet on the side facing the rear end of the casing. The second impeller is located at the ordinary air inlet; The partition shell has an ion air inlet channel that connects the annular air duct to the ion air inlet chamber, and the negative ion generator is located at the ion air inlet channel.

2. The negative ion air purifying and circulating fan according to claim 1, characterized in that, The rotary drive mechanism includes a dual-shaft motor installed inside the housing, with its two output shafts coaxially connected to the first impeller and the second impeller, respectively.

3. The negative ion air purifying and circulating fan according to claim 1, characterized in that, A filter is installed at the rear of the casing. Outside air passes through the filter and then enters the negative ion air duct and the ordinary air duct.

4. The negative ion air purifying and circulating fan according to claim 1, characterized in that, It also includes a base; The housing is connected to the base via a rotating connection mechanism. The rotation axis of the rotating connection mechanism is parallel to the horizontal plane, allowing the housing to be adjusted in pitch relative to the base. The base is also provided with a pitch drive assembly for driving the housing to rotate around the axis of the rotating connection mechanism.

5. A negative ion air purifying and circulating fan according to claim 4, characterized in that, The pitch drive components include: An arc-shaped rack is installed on the inner wall of the housing; The pitch drive motor is located in the base, and its output shaft extends upward at an angle into the housing. The pitch drive gear is coaxially mounted on the output shaft of the pitch drive motor and meshes with the arc-shaped rack.

6. A negative ion air purifying and circulating fan according to claim 4, characterized in that, The base includes: The base contains a rotation drive mechanism; The rotating seat is coaxially rotatably mounted on the base and is connected to the rotation drive mechanism for transmission. The pitch drive assembly is located in the rotating seat.

7. A negative ion air purifying and circulating fan according to claim 6, characterized in that, The rotary drive mechanism includes: A fixed gear is coaxially and fixedly mounted on the top of the base; A rotation drive motor is fixedly mounted at the bottom end of the rotating disk, and its output shaft extends downward. The driving gear is coaxially and fixedly mounted on the output shaft of the rotary drive motor, and the driving gear meshes with the fixed gear.

8. A negative ion air purifying and circulating fan according to claim 5, characterized in that, The rear end of the housing is provided with an arc-shaped guide groove that extends along the arc-shaped rack, and the base is provided with a slider that extends into the arc-shaped guide groove and slides with it.

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