Vehicle-mounted air purifier capable of automatic air speed control, operation method for said vehicle-mounted air purifier, and low-temperature plasma generator

Abstract

A vehicle-mounted air purifier capable of automatic air speed control. The air purifier comprises a temperature collection module and a determination and control module, wherein the determination and control module is electrically connected to a low-temperature plasma generator (2) and is electrically connected to the temperature collection module; and the determination and control module performs analysis on the basis of data obtained by the temperature collection module by means of measurement, so as to control the start and stop of the low-temperature plasma generator. Further provided are a low-temperature plasma generator and an operation method for the vehicle-mounted air purifier capable of automatic air speed control. When the vehicle-mounted air purifier is used in any vehicle, it can always be ensured that the vehicle-mounted air purifier operates when there is an airflow and stops operation when there is no airflow, thereby preventing various potential risks.

Description

A vehicle-mounted air purifier with automatic wind speed control and its operation method, a low-temperature plasma generator Technical Field

[0001] The present invention relates to the field of air purification, and in particular to an on-vehicle air purifier with automatic wind speed control, an operating method thereof, and a low-temperature plasma generator. Background Art

[0002] The car air purifiers currently on the market mainly include the following technical categories:

[0003] The first is adsorption technology, which mainly removes dust, dander, pollen and other pollutants in the air through HEPA filters or activated carbon filters, but the cost of consumables is high during use and it is easy to cause secondary pollution.

[0004] The second is ultraviolet photocatalyst technology, which mainly produces catalytic degradation function through the action of light. However, this type of product must be excited by ultraviolet light of a specific wavelength to achieve purification. The product life is short and humans and machines cannot coexist.

[0005] The third is negative ion technology, which achieves purification by mixing negative ions with dirty ions to generate static electricity to cause particles to settle. However, the purification particles have poor activity and high discharge voltage, which easily produces adverse secondary byproducts.

[0006] The fourth type is plasma technology, which achieves purification through plasma DBD discharge. It is currently popular in the market, but in actual applications, it is prone to large wind resistance and obvious turbulence, which causes the problem of ozone accumulation during use. In addition, since the plasma generators currently on the market all use DBD dielectric discharge formed by two upper and lower metal meshes plus a medium and a metal electrode in the middle, and since the upper and lower metal meshes are processed and formed separately, this causes the electric field formed between them and the middle electrode to be inconsistent, so the consistency of the final product performance cannot be guaranteed.

[0007] Moreover, most of the car air purifiers used on the market do not have a fan drive themselves and need to be used externally at the air-conditioning outlet in the car. Currently, this type of air purifier is generally powered by the car's cigarette lighter (DC12V) or USB (DC5V) interface. However, the USB interface of some older models will still be powered after the vehicle is turned off. On the one hand, this will cause the connected air purifier to always dry burn, creating a potential safety hazard. On the other hand, it will also continuously consume the vehicle's storage capacity, causing a power shortage risk to the vehicle.

[0008] Very few car air purifiers use wind speed control products. Since the wind control they use is a common wind control integrated module with a PTC sensor head on the market, the temperature of the air-conditioning outlet may reach 60°C or above when the vehicle turns on the heater in winter. When the operating temperature of the PTC sensor head is close to or the same as the ambient temperature, its sensitivity to wind speed will decrease. At this time, this type of wind control switch may fail. This module has a simple structure, a single function, and weak environmental adaptability. It cannot fully meet the needs of different cold and hot air usage environments of the car's air conditioning. It will fail during use, causing the product it controls to malfunction. Technical issues

[0009] The first object of the present invention is to provide a vehicle-mounted air purifier with automatic wind speed control, which is used to solve the problem that existing vehicle-mounted air purifiers cannot effectively control the working state and have safety hazards.

[0010] The second object of the present invention is to provide a low-temperature plasma generator, which is installed in the above-mentioned vehicle-mounted air purifier with automatic wind speed control, so as to solve the problem of unstable performance of existing plasma generator products.

[0011] The third object of the present invention is to provide an operating method for a vehicle-mounted air purifier with automatic wind speed control, which is applicable to the above-mentioned vehicle-mounted air purifier with automatic wind speed control.

[0012] A fourth object of the present invention is to provide a low-temperature plasma generator that uses a one-piece ground electrode to bend to form a flow guide structure, with high product performance consistency and simple manufacturing process. Technical Solutions

[0013] In order to achieve the above-mentioned first purpose, the present invention provides a vehicle-mounted air purifier with automatic wind speed control, including a casing, a low-temperature plasma generator and a circuit board arranged inside the casing, the low-temperature plasma generator is located on one side of the circuit board, the circuit board includes a temperature acquisition module and a judgment control module, the judgment control module is electrically connected to the low-temperature plasma generator, the judgment control module is electrically connected to the temperature acquisition module, the judgment control module controls the start and stop of the low-temperature plasma generator based on the signal detected by the temperature acquisition module, and the vehicle-mounted air purifier is provided with a wind speed detection channel; the temperature acquisition module includes a first temperature sensor, a second temperature sensor, a heat dissipation cover and a heater, the first temperature sensor is located at the front end of the second temperature sensor, a heater is provided on the rear side of the second temperature sensor, a heat dissipation cover is provided on the outside of the second temperature sensor and the heater, and the temperature acquisition module is located in the wind speed detection channel.

[0014] A further solution is that the casing includes an upper shell and a lower shell, the upper shell is provided with a fastener, and the lower shell is provided with a buckle groove, and the fastener matches the buckle groove.

[0015] A further solution is that a mounting frame is provided between the upper shell and the lower shell, and a hollow through slot is provided on the mounting frame. The hollow through slot passes through the casing, and symmetrical slots are provided on both sides of the hollow through slot. The low-temperature plasma generator is fixed in the hollow through slot through the slot.

[0016] A further solution is that the circuit board is arranged below the hollow through slot, and a downward extending protruding baffle is provided on the outer side of the bottom of the hollow through slot, and the protruding baffle contacts the upper surface of the circuit board to form a wind speed detection channel, and an air outlet connected to the wind speed detection channel is provided on the mounting frame; a wind speed detection hole is provided on the outer wall of the lower shell, and the wind speed detection hole is connected to the wind speed detection channel.

[0017] A further solution is that a charging interface and a button switch are provided at the bottom of the housing, and both the charging interface and the button switch are electrically connected to the circuit board.

[0018] A further solution is that the vehicle-mounted air purifier further includes at least one working indicator light, the working indicator light and the low-temperature plasma generator are located in the same horizontal plane, and the working indicator light is electrically connected to the circuit board through a connector.

[0019] In order to achieve the above-mentioned second purpose, the present invention provides a low-temperature plasma generator, comprising a ground electrode, a high-voltage electrode and two groups of dielectric layers. The low-temperature plasma generator is arranged in an automatic wind speed control vehicle air purifier described in any of the above-mentioned schemes; the ground electrode is formed by bending a single-piece ground electrode, and the ground electrode includes two symmetrical metal outer meshes in the upper and lower directions. A guide structure is provided on one side of the ground electrode in the horizontal direction, and the guide structure has a guide surface inclined to the metal outer mesh. A wrapping structure is formed on the side of the ground electrode away from the guide structure; the high-voltage electrode is fixedly connected between the two groups of dielectric layers, and the two groups of dielectric layers are connected to the ground electrode. In the vehicle air purifier, the guide structure is located at the front end of the wrapping structure.

[0020] A further solution is that the grounding electrode is provided with a first lead-out end, the first lead-out end is arranged in the width direction of the grounding electrode, and the first lead-out end is located on one side of one of the metal outer meshes; the high-voltage electrode is provided with a second lead-out end, and the second lead-out end and the first lead-out end are located on the same side of the low-temperature plasma generator.

[0021] A further solution is that the metal outer mesh is a hexagonal mesh structure.

[0022] A further solution is that the high-voltage electrode is composed of a plurality of high-voltage electrode partitions, and each high-voltage electrode partition is connected with gaps; a plurality of discharge holes are provided on each high-voltage electrode partition, and the discharge holes are distributed throughout the entire high-voltage electrode partition.

[0023] A further solution is that the dielectric layer is frosted glass.

[0024] In order to achieve the third purpose mentioned above, the present invention provides an operating method of a vehicle-mounted air purifier with automatic wind speed control, which is applicable to a vehicle-mounted air purifier with automatic wind speed control described in any of the above schemes; the operating method includes: the vehicle-mounted air purifier is used in the vehicle, and when the vehicle is started and the air conditioner is turned on to vent air, the air flow enters the air detection channel, the heater heats up, the temperature acquisition module collects temperature data and outputs it to the judgment control module, the judgment control module calculates the wind speed based on the temperature difference between the first temperature sensor and the second temperature sensor, when the wind speed is higher than or equal to the preset wind speed threshold, the low-temperature plasma generator is started, and when there is no wind or the wind speed is less than the preset wind speed threshold, the low-temperature plasma generator is turned off.

[0025] In order to achieve the above-mentioned fourth purpose, the present invention provides a low-temperature plasma generator including a grounding electrode, a high-voltage electrode and a dielectric layer; wherein the grounding electrode is a one-piece grounding electrode, and the one-piece grounding electrode includes two second metal outer mesh areas and a metal connecting plate area located between the two metal outer mesh areas; the metal connecting plate area is provided with at least three half grooves parallel to the metal outer mesh area, wherein the half groove located in the middle is the first half groove, and the other half groove is the second half groove, and the second half groove is symmetrically arranged with the first half groove as the axis, and the two metal outer mesh areas are symmetrically arranged with the first half groove as the axis. The one-piece grounding electrode can be folded along the first half groove to form a grounding electrode with a guide structure, wherein the first half groove and the second half groove both extend from the first surface of the one-piece grounding electrode to the second surface, the first surface is located inside the folded one-piece grounding electrode, and the second surface is located outside the folded one-piece grounding electrode, the guide structure is located on one side in the width direction of the folded one-piece grounding electrode, and the guide structure is formed by bending the metal connecting sheet area, the guide structure has two guide surfaces, each guide surface is inclined to the metal outer mesh area; the dielectric layer and the high-voltage electrode are located inside the folded one-piece grounding electrode.

[0026] A further solution is that the one-piece grounding electrode includes two wrapped areas, which are respectively located on the side of the two metal outer mesh areas away from the metal connecting plate. A third half groove is provided on both wrapped areas, and the third half groove is arranged parallel to the first half groove.

[0027] A further solution is that the one-piece ground electrode is provided with a first lead-out end, and along the length direction of the first half groove, the first lead-out end is located on one side of the metal outer mesh area.

[0028] A further solution is that the high voltage electrode is provided with a second lead-out end, and along the length direction of the first half groove, the second lead-out end and the first lead-out end are located on the same side of the low temperature plasma generator.

[0029] A further solution is that the metal outer mesh area includes multiple hexagonal honeycomb structures, the high-voltage electrode is provided with multiple hexagonal structures, and the multiple hexagonal structures are connected into one by metal sheets; the honeycomb structure of the metal outer mesh area is arranged in a one-to-one correspondence with the hexagonal structure of the high-voltage electrode. Beneficial effects

[0030] In the vehicle-mounted air purifier of the present invention, a temperature acquisition module uses separate first and second temperature sensors to collect the temperatures of the air inlet and outlet. The circuit board records the temperatures detected by the temperature acquisition module. The judgment control module uses the temperature difference to determine the wind speed, thereby automatically controlling the low-temperature plasma generator on and off based on the wind speed, thereby automatically controlling the operating state of the vehicle-mounted air purifier. A heater is positioned adjacent to the second heater to increase the temperature rise, thereby increasing the temperature difference between the first and second temperature sensors. A heat dissipation shield is used to improve the heat dissipation capacity in windy conditions, thereby increasing the signal variation strength. The ion generator is used to purify the air through the low-temperature plasma generator. When used in any vehicle, the vehicle-mounted air purifier of the present invention can be guaranteed to operate in windy conditions and stop in windless conditions (when the vehicle is turned off or the air conditioning is manually turned off) to avoid various hidden dangers.

[0031] The tight fit of the upper and lower shells, achieved through fasteners and slots, ensures a tight connection. This tight fit effectively prevents moisture and dust from entering the device, protecting the internal electronic components and improving its reliability and durability. This tight fit also enhances the mechanical strength of the overall structure, ensuring the product can successfully pass drop tests and withstand damage even in the event of an accidental drop during daily use. The low-temperature plasma generator is securely fixed in the housing by a mounting bracket and is exposed to the outside air, effectively purifying the device.

[0032] The wind speed detection channel's structure effectively and accurately detects temperature differences, thereby accurately determining wind speed. The concealed air duct design not only enhances the overall aesthetics but also reduces wind resistance and improves safety. The charging port and push-button switch effectively control the vehicle's air purifier's operating status.

[0033] The working indicator light illuminates the low-temperature plasma generator, perfectly combining the two. When the product is working, the entire surface of the low-temperature plasma generator will emit a light blue light, prompting the user that the product is working normally. It is both beautiful and avoids light pollution.

[0034] The low-temperature plasma generator of the present invention utilizes a single-piece, bent-shaped ground electrode to form a flow-guiding structure on the windward side of the ion generating unit. This reduces wind resistance and increases gas flow rate across the unit, accelerating ion diffusion and reducing the potential for ozone accumulation. Furthermore, the single-piece ground electrode incorporates both metal meshes from the ion generating unit, resulting in a single-piece production process. This ensures consistent structure and consistent electric field strength across both sides of the unit, while also reducing production costs and overall assembly steps, thereby improving production efficiency.

[0035] The one-piece ground electrode structure may be provided with only one first lead-out terminal, thereby reducing the bending and welding steps of the first lead-out terminal, improving process efficiency, and saving costs.

[0036] The low-temperature plasma generator of this invention utilizes a unique structural design that shunts, guides, and concentrates the electric field throughout the discharge volume, creating a uniformly distributed corona dark discharge across the entire surface of the low-temperature ion generator. This significantly improves the overall discharge effect and enhances product consistency. Furthermore, the hexagonal electrode structure maximizes electric field uniformity compared to other structures, making resonance less likely and thus avoiding whistling. Furthermore, the process is simple and production efficiency is high.

[0037] The medium used is frosted glass, so that the faint light emitted during operation can present a diffuse reflection effect and will not irritate the human eyes.

[0038] The operation mode of the present invention can effectively control the start and stop of purification of the vehicle-mounted air purifier, and the safety factor of use is higher.

[0039] A low-temperature plasma generator of the present invention adopts a uniquely designed one-piece bent-shaped grounding electrode. This design cleverly constructs a flow-guiding structure on the windward side of the ion generating unit, effectively reducing the wind resistance faced by the product. At the same time, this structure also improves the gas flow rate on the surface of the ion generating unit, further promotes the rapid diffusion of ions, and significantly reduces the risk of ozone accumulation. It is worth mentioning that this grounding electrode also integrates the two metal outer meshes in the ion generating unit, realizing one-time production, ensuring the structural consistency of the two metal outer meshes, and thus ensuring the balance of the electric field strength on both sides of the ion generating unit. In addition, this design also simplifies the production process, reduces the overall assembly production process, thereby improving production efficiency and reducing production costs. The setting of the half-groove facilitates positioning, and the product can accurately locate the length and angle of the bending position with the assistance of the jig.

[0040] After the third half of the groove is bent, the product wrapping function is realized and the aesthetics of the product is improved.

[0041] The use of a one-piece grounding electrode structure design can simplify the process steps and only requires the provision of a first lead-out terminal. This not only reduces the bending and welding process of the first lead-out terminal and reduces production complexity, but also significantly improves process efficiency, thereby achieving cost savings. This design optimization makes the entire production process more efficient and economical. The hexagonal structure of the high-voltage electrode corresponds one-to-one with the hexagonal honeycomb structure of the one-piece grounding electrode to form a discharge partition, which diverts, guides, and concentrates the electric field of the entire discharge body, so that the electric field forms a uniformly distributed corona dark discharge on the entire surface of the ion generator, thereby greatly improving the overall discharge effect and enhancing product consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] FIG1 is a structural diagram of a vehicle-mounted air purifier with automatic wind speed control according to a first embodiment.

[0043] FIG. 2 is an exploded view from a first perspective of the vehicle-mounted air purifier with automatic wind speed control according to the first embodiment.

[0044] FIG3 is an exploded view from a second perspective of the vehicle-mounted air purifier with automatic wind speed control according to the first embodiment of the present invention.

[0045] FIG. 4 is a structural diagram of a mounting bracket according to a first embodiment of the present invention.

[0046] FIG5 is a structural diagram of a circuit board according to a first embodiment of the present invention.

[0047] FIG6 is an enlarged view of point A in FIG5.

[0048] FIG. 7 is an exploded view from a third perspective of the vehicle-mounted air purifier with automatic wind speed control according to the first embodiment of the present invention.

[0049] FIG8 is an enlarged view of point B in FIG7 .

[0050] FIG9 is a structural diagram of a low-temperature plasma generator according to a first embodiment of the present invention.

[0051] FIG. 10 is an exploded view of the low-temperature plasma generator according to the first embodiment of the present invention.

[0052] FIG11 is a schematic diagram of a control circuit according to a first embodiment of the present invention.

[0053] FIG. 12 is a structural diagram of a one-piece ground electrode according to a second embodiment.

[0054] FIG13 is a cross-sectional view taken along the line DD in FIG12 .

[0055] FIG14 is a structural diagram of a high voltage electrode according to the second embodiment.

[0056] FIG15 is a schematic structural diagram of the low-temperature plasma generator of the second embodiment in a flat state.

[0057] FIG16 is a schematic structural diagram of the low-temperature plasma generator of the second embodiment in a state of being bent 90 degrees.

[0058] FIG17 is a schematic structural diagram of the low-temperature plasma generator of the second embodiment in a folded state.

[0059] The present invention will be further described below with reference to the accompanying drawings and embodiments. Modes for Carrying Out the Invention

[0060] First embodiment:

[0061] Referring to Figures 1 to 8, the vehicle-mounted air purifier with automatic wind speed control of this embodiment includes a casing, a low-temperature plasma generator 2 arranged in the casing 1, and a circuit board 3. The casing includes an upper shell 11 and a lower shell 12. A fastener 111 is provided on the upper shell 11, and a buckle groove 121 adapted to the fastener 111 is provided on the lower shell 12. The fastener 111 matches the buckle groove 121 to achieve a tight fit between the upper shell 11 and the lower shell 12, thereby ensuring the sealing of the vehicle-mounted air purifier.

[0062] A mounting frame 4 is provided between the upper shell 11 and the lower shell 12. The mounting frame 4 is provided with a hollow through-slot 43 that passes through the casing 1. The mounting frame 4 is symmetrically provided with slots 44 in the middle of both sides of the hollow through-slot 43. The low-temperature plasma generator 2 is fixed in the hollow through-slot 43 through the slots 44.

[0063] The circuit board 3 is arranged below the hollow through slot 43. A downward extending protruding baffle 47 is provided on the outer side of the bottom of the hollow through slot 43. The protruding baffle 47 contacts the upper surface of the circuit board 3 to form a wind speed detection channel 42. The mounting frame 4 is provided with an air outlet 48 connected to the wind speed detection channel; a wind speed detection hole 13 is provided on the outer wall of the lower shell 12, and the wind speed detection hole 13 is connected to the wind speed detection channel 42.

[0064] The bottom of the mounting frame 4 is provided with a first mounting tube 45 and a second mounting tube 46, which are vertically connected to each other. The first mounting tube 45 is provided with a first insertion hole 41, which extends through the first mounting tube 45, and the second mounting tube is provided with a second insertion hole. The bottom of the lower housing 12 is provided with a mounting hole 15 corresponding to the second insertion hole, and a screw fastener 5 is inserted into the mounting hole 15 facing the second insertion hole. The outer wall of the lower housing 12 is provided with a snap-on mounting hole 14 corresponding to the first insertion hole 41.

[0065] The bottom of the lower housing 12 is further provided with a charging interface 18 and a button hole 16, in which a button switch 17 is provided. The charging interface 18 can be a USB interface. The charging interface 18 and the button switch 17 are electrically connected to the circuit board 3 respectively.

[0066] The circuit board 3 is equipped with a temperature acquisition module and a judgment and control module. The judgment and control module is electrically connected to the low-temperature plasma generator 2. The judgment and control module analyzes and controls the start and stop of the low-temperature plasma generator 2 based on the data detected by the temperature acquisition module. The temperature acquisition module includes a first temperature sensor 31 and a second temperature sensor 32, which are arranged along the wind speed detection channel 42. The first temperature sensor 31 is located in front of the second temperature sensor 32. A heater 33 is located behind the second temperature sensor 32. A heat dissipation cover 34 is located outside the second temperature sensor 32 and the heater 33. In this embodiment, the heat dissipation cover 34 is an arched cover located above the second temperature sensor 32 and the heater 33.

[0067] The vehicle-mounted air purifier also includes two working indicator lights 302, which are located in the same horizontal plane as the low-temperature plasma generator 2. The two working indicator lights 302 are respectively located on both sides of the length direction of the low-temperature plasma generator 2, and the two working indicator lights 302 are electrically connected to the circuit board 3 through the connector 301.

[0068] 9 and 10 , the low-temperature plasma generator 2 includes a ground electrode 21, a high-voltage electrode 23, and two sets of dielectric layers 22. The ground electrode 21 is formed by bending a single-piece ground electrode. The ground electrode 21 includes two symmetrical metal outer meshes 214. A flow-guiding structure 211 is provided on one side of the ground electrode 21 in the horizontal direction. The flow-guiding structure 211 has a flow-guiding surface inclined to the metal outer mesh 214. A wrapping structure 213 is formed on the side of the ground electrode 21 away from the flow-guiding structure 211. The high-voltage electrode 23 is fixedly connected between the two sets of dielectric layers 22. The two sets of dielectric layers 22 are connected to the ground electrode 21. In the vehicle-mounted air purifier, the flow-guiding structure 211 is located at the front end of the wrapping structure 213.

[0069] The ground electrode 21 is provided with a first lead-out terminal 212, which is arranged in the width direction of the ground electrode 21 and is located on one side of one of the metal outer meshes 214. Specifically, in this embodiment, the first lead-out terminal 212 extends outward from one side of the metal outer mesh 214. The high-voltage electrode 23 is provided with a second lead-out terminal 231, which is located on the same side of the low-temperature plasma generator 2 as the first lead-out terminal 212.

[0070] In this embodiment, the metal outer mesh 214 has a hexagonal mesh structure. The high-voltage electrode 23 is composed of multiple high-voltage electrode sections 232, each of which is connected by gaps. In this embodiment, the high-voltage electrode sections 232 are hexagonal. Each high-voltage electrode section 232 is provided with multiple discharge holes, which are distributed throughout the high-voltage electrode section 232.

[0071] In this embodiment, both dielectric layers 22 are frosted glass. When operating, the operating indicator light 302 illuminates, illuminating the low-temperature plasma generator 2 with a faint blue glow, indicating its operational status. The light is diffusely reflected by the frosted glass, resulting in a soft, non-glaring glow. In this embodiment, the two dielectric layers 22 are connected to the high-voltage electrode 23 and the ground electrode 21, respectively, using UV-cured adhesive.

[0072] The low-temperature plasma generator of this embodiment utilizes a single-piece, bent-form ground electrode 21, forming a flow-guiding structure on the windward side of the ion generating unit. This reduces the product's wind resistance, increases the gas flow rate on the surface of the ion generating unit, accelerates ion diffusion, and reduces the potential for ozone accumulation. Furthermore, the single-piece ground electrode also incorporates the two metal outer meshes 214 of the ion generating unit. This single-piece production process allows the two metal outer meshes 214 to maintain consistent structure, ensuring consistent electric field strength on both sides of the ion generating unit. Furthermore, the single-piece structure requires only a single first lead-out terminal 212, eliminating the need for bending and welding the first lead-out terminal 212. This reduces manufacturing costs, reduces the overall assembly process steps, and improves production efficiency.

[0073] Both the high-voltage electrode 23 and the ground electrode 21 utilize a hexagonal structure, which diverts, directs, and concentrates the electric field throughout the discharge volume, creating a uniformly distributed corona dark discharge across the entire surface of the low-temperature ion generator 2. This significantly improves the overall discharge effect and enhances product consistency. Compared to other structures, the hexagonal structure maximizes electric field uniformity, reduces resonance, and thus prevents whistling. It also simplifies the process and increases production efficiency.

[0074] The ground electrode 21 and the high-voltage electrode 23 are bonded together by UV curing glue, which saves time and improves work efficiency. At the same time, the bonding and pressurization ensure that the high-voltage electrode and the dielectric layer are tightly bonded, further improving the overall discharge effect.

[0075] The operating method of the vehicle-mounted air purifier with automatic wind speed control in this embodiment includes: the vehicle-mounted air purifier is used in a vehicle. When the vehicle is started or the air conditioner is venting, air flows into the air detection channel 42, the heater 33 heats up, and the temperature acquisition module collects temperature data and outputs it to the judgment control module. The judgment control module calculates the wind speed based on the temperature difference between the first temperature sensor 31 and the second temperature sensor 32. When the wind speed is greater than or equal to a preset wind speed threshold, the low-temperature plasma generator 2 is activated. When there is no wind or the wind speed is less than the preset wind speed threshold, the low-temperature plasma generator 2 is deactivated. In this embodiment, the preset wind speed threshold is 0.5 m / s.

[0076] The operating principle of this embodiment is that convective heat transfer relies on the movement of fluid particles to transfer heat and is closely related to the fluid's flow conditions. The fluid's flow conditions are referenced by the wind speed in this invention. According to Newton's law of cooling, the heat flux from convective heat transfer between the fluid and the solid wall is proportional to the temperature difference between them. Therefore, under steady-state conditions with constant heating power, this embodiment calculates the temperature difference between the first temperature sensor 31 and the second temperature sensor 32 to obtain the convective heat transfer coefficient h at different wind speeds. This allows the calculation of the specific wind speed, which can then be used to determine whether the wind speed meets the requirements and, therefore, to determine whether to output an on / off signal to the low-temperature plasma generator 2.

[0077] This embodiment uses the difference between the first temperature sensor 31 and the second temperature sensor 32 for calculation. Compared to the temperature change difference of a single sensor, this embodiment has the advantage of almost completely eliminating the impact of temperature extremes on the test value, thereby accurately determining whether the wind speed at various temperatures meets the power-on and power-off requirements, ensuring normal operation of the entire device. Referring to Figure 11, the control circuit of this embodiment includes an AC oscillation boost circuit 35, a DC-DC boost circuit 36, a power supply circuit 37, a judgment control module 38, and an air flow rate acquisition circuit 39. The power supply circuit 37 receives an external DC voltage and outputs it to the DC-DC boost circuit 36. The DC-DC boost circuit 36 ​​boosts the external voltage and outputs it to the AC oscillation boost circuit 35 to form AC power, which is then supplied to the low-temperature plasma generator 2.

[0078] The judgment control module 38 includes a processor for calculating wind speed from the recorded temperature difference and comparing the calculated wind speed with a set wind speed threshold to output an on / off signal to the low-temperature plasma generator 2. This control controls the opening and closing of the switch S1 in FIG11 , thereby controlling the start and stop of the low-temperature plasma generator 2. The air flow rate acquisition circuit 39 includes the aforementioned first temperature sensor 31 and second temperature sensor 32.

[0079] Because the determination and control module of circuit board 3 in this embodiment can both calculate wind speed and drive low-temperature plasma generator 2, a pre-programmed program can be programmed into the software to directly adjust the on / off time of low-temperature plasma generator 2 via signals sent by the IC, thereby adjusting its operating state. For example, when the air volume is low, the software can control the low-temperature plasma generator 2 to be on for 0.2 seconds and off for 0.2 seconds, thereby reducing the total ion release by 50%. When the air volume is high, the system can be controlled to be always on, in which case the total ion release is 100%.

[0080] It should be noted that because a heater with a smaller volume (i.e., smaller specific heat capacity) utilizes less power and achieves a higher temperature rise rate, a higher temperature rise rate facilitates quickly reaching a temperature stabilization point. According to Newton's law of cooling, when there is no wind and steady state is reached, this is a natural heat dissipation state, which can obtain a stable temperature difference value for the first temperature sensor 31 relative to the environment. This also allows the second temperature sensor 32 to reach a temperature after heating, quickly reaching a balance between heating power and natural heat dissipation power. When there is wind, the high-temperature radiator 34 can have some heat removed by the air, which means that it has a certain heat dissipation power. This heat dissipation power is theoretically positively correlated with wind speed.

[0081] Second embodiment:

[0082] The low-temperature plasma generator provided in this embodiment can be applied to the vehicle-mounted air purifier with automatic wind speed control of the first embodiment.

[0083] 12 to 15 , the low-temperature plasma generator provided in this embodiment includes a one-piece ground electrode 6 , a dielectric layer 7 and a high-voltage electrode 8 .

[0084] Referring to Figures 12 and 13, the one-piece ground electrode 6 includes two metal mesh regions 61, a metal connecting plate region 62, and two wrapping regions 63. The metal connecting plate region 62 is located between the two metal mesh regions 61, and the two wrapping regions 63 are located on one side of the two metal mesh regions 61 away from the metal connecting plate region 62. The metal mesh of the metal mesh region 61 includes multiple hexagonal honeycomb structures 612. Three half-grooves are provided on the metal connecting plate region 62. All three half-grooves are parallel to the length of the metal mesh region 61. The middle half-groove is the first half-groove 621, and the remaining two half-grooves are the second half-groove 622. The second half-groove 622 is arranged symmetrically with respect to the first half-groove 621. The two metal mesh regions 61 are arranged symmetrically with respect to the first half-groove 621. Both wrapping regions 63 are provided with a third half-groove 631, which is arranged parallel to the first half-groove 621. The single-piece ground electrode 6 is also provided with a first lead-out terminal 611, which is located on one side of one of the metal outer mesh regions 61 along the length of the first half-groove 621. Specifically, in this embodiment, the first lead-out terminal 611 extends outward from one side of the metal outer mesh region 61. Referring to Figure 12, the first half-groove 621, the second half-groove 622, and the third half-groove 631 all extend from the first surface 64 of the single-piece ground electrode 6 toward the second surface.

[0085] 14 , the high-voltage electrode 8 is provided with a plurality of hexagonal structures 82 , each of which is provided with a plurality of hexagonal discharge holes 821 , and the hexagonal structures 82 are connected as a whole by metal sheets. The high-voltage electrode 8 is also provided with a second lead-out terminal 81 .

[0086] Referring to FIG15 , there are two dielectric layers 7 , each of which is a glass dielectric. The two dielectric layers 7 are respectively bonded to the first surfaces 64 of the two metal outer mesh areas 61 by UV glue curing, and the high-voltage electrode 8 is bonded to the side of the dielectric layer 7 away from the one-piece grounding electrode 6 by UV glue curing.

[0087] Referring to Figures 16 and 17 , the one-piece ground electrode 6 can be folded along the first half-groove 621 to form a ground electrode with a flow-conducting structure. The dielectric layer 7 and the high-voltage electrode 8 are located within the folded one-piece ground electrode 6. The first surface 64 is located within the folded one-piece ground electrode 6, while the second surface is located outside the folded one-piece ground electrode 7. The flow-conducting structure 9 is located on one side of the width of the folded one-piece ground electrode 6. The flow-conducting structure 9 is formed by bending the metal connecting plate region 62. The flow-conducting structure 9 has two flow-conducting surfaces 91, each of which is inclined relative to the metal outer mesh region 91. The first lead-out terminal 611 and the second lead-out terminal 81 are located on the same side of the low-temperature plasma generator.

[0088] The low-temperature plasma generator of this embodiment uses a one-piece bent ground electrode to form a flow-guiding structure on the windward side of the ion generating unit, thereby reducing the wind resistance of the product and increasing the gas flow rate on the surface of the ion generating unit, accelerating the diffusion of ions and reducing the possibility of ozone accumulation. In addition, the one-piece ground electrode also includes two metal outer meshes in the ion generating unit, which are obtained through one-time production, so that the structures of the two metal outer meshes can remain consistent, ensuring the consistency of the electric field strength on both sides of the ion generating unit. The one-piece structure can only be provided with one first lead-out terminal, reducing the bending and welding process of the first lead-out terminal, while reducing the production cost, reducing the overall assembly production process, and improving production efficiency. The setting of the half-groove facilitates positioning, and the product can accurately locate the length and angle of the bending position with the assistance of the jig.

[0089] Both the high-voltage electrode and the one-piece ground electrode utilize a hexagonal structure, which evenly disperses the ripple generated by the oscillating circuit, making resonance less likely and thus avoiding whistling. The high-voltage electrode is configured with discharge zones. In the low-temperature plasma discharge device, the hexagonal structure 82 of the high-voltage electrode corresponds one-to-one with the hexagonal honeycomb structure 612 of the one-piece ground electrode, forming discharge zones. This divides, guides, and concentrates the electric field of the entire discharge volume, resulting in a uniformly distributed corona dark discharge across the entire surface of the ion generator, significantly improving the overall discharge effect and enhancing product consistency.

[0090] The single-piece ground electrode and high-voltage electrode are bonded together using UV adhesive, saving time and improving work efficiency. At the same time, bonding and pressurizing ensure a tight bond between the high-voltage electrode and the dielectric layer, further improving the overall discharge effect.

[0091] The low-temperature plasma generator of this embodiment has higher ion release efficiency and lower ozone emission, while also reducing material costs and significantly improving production efficiency. It can be widely used in air purification devices, air disinfection equipment, and civilian consumer electronics such as fans and air conditioners.

[0092] The above embodiments are merely preferred examples of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structure, features, and principles of the present invention should be included in the scope of application of the present invention. Industrial Applicability

[0093] The vehicle-mounted air purifier with automatic wind speed control and its operating method, as well as a low-temperature plasma generator provided by the present invention can be applied to the field of vehicle-mounted air purification.

[0094] The vehicle-mounted air purifier and operating method provided by the present invention, when used in any vehicle, ensures that it operates when there is wind and stops operating when there is no wind (when the vehicle is turned off or the air conditioner is manually turned off), thereby avoiding various hidden dangers. The low-temperature plasma generator provided by the present invention reduces material costs, significantly improves production efficiency, and achieves better performance.

Claims

1. A vehicle-mounted air purifier with automatic wind speed control, comprising a housing, a low-temperature plasma generator disposed within the housing, and a circuit board, characterized in that: The low-temperature plasma generator is located on one side of the circuit board. The circuit board includes a temperature acquisition module and a judgment control module. The judgment control module is electrically connected to the low-temperature plasma generator. The judgment control module is electrically connected to the temperature acquisition module. The judgment control module controls the start and stop of the low-temperature plasma generator based on the signal detected by the temperature acquisition module. The vehicle-mounted air purifier is provided with a wind speed detection channel; The temperature acquisition module includes a first temperature sensor, a second temperature sensor, a heat dissipation cover and a heater. The first temperature sensor is located at the front end of the second temperature sensor, the heater is provided on the rear side of the second temperature sensor, the heat dissipation cover is provided on the outside of the second temperature sensor and the heater, and the temperature acquisition module is located in the wind speed detection channel.

2. The vehicle-mounted air purifier with automatic wind speed control according to claim 1, characterized in that: The housing comprises an upper shell and a lower shell, the upper shell is provided with a fastener, the lower shell is provided with a fastener groove, and the fastener matches the fastener groove.

3. The vehicle-mounted air purifier with automatic wind speed control according to claim 2, characterized in that: A mounting frame is provided between the upper shell and the lower shell, and a hollow through-slot is provided on the mounting frame. The hollow through-slot passes through the casing, and symmetrical slots are provided on both sides of the hollow through-slot. The low-temperature plasma generator is fixed in the hollow through-slot through the slots.

4. The vehicle-mounted air purifier with automatic wind speed control according to claim 3, characterized in that: The circuit board is arranged below the hollow through slot, and a downwardly extending protruding baffle is provided on the outer side of the bottom of the hollow through slot, and the protruding baffle contacts the upper surface of the circuit board to form the wind speed detection channel, and the mounting frame is provided with an air outlet connected to the wind speed detection channel; A wind speed detection hole is provided on the outer wall of the lower shell, and the wind speed detection hole is communicated with the wind speed detection channel.

5. The vehicle-mounted air purifier with automatic wind speed control according to any one of claims 1 to 4, characterized in that: A charging interface and a button switch are provided at the bottom of the housing, and both the charging interface and the button switch are electrically connected to the circuit board.

6. The vehicle-mounted air purifier with automatic wind speed control according to any one of claims 1 to 4, characterized in that: The vehicle-mounted air purifier further includes at least one working indicator light, which is located in the same horizontal plane as the low-temperature plasma generator and is electrically connected to the circuit board via a connector.

7. A low-temperature plasma generator comprising a ground electrode, a high-voltage electrode, and two sets of dielectric layers, characterized in that: The low-temperature plasma generator is provided in the vehicle-mounted air purifier with automatic wind speed control according to any one of claims 1 to 6; The grounding electrode is formed by bending a single-piece grounding electrode, and the grounding electrode includes two symmetrical metal outer meshes. A guide structure is provided on one side of the grounding electrode in the horizontal direction, and the guide structure has a guide surface inclined to the metal outer mesh. The side of the grounding electrode away from the guide structure forms a wrapping structure. The high-voltage electrode is fixedly connected between the two groups of dielectric layers, and the two groups of dielectric layers are connected inside the ground electrode.

8. A low-temperature plasma generator according to claim 7, characterized in that: The ground electrode is provided with a first lead-out end, the first lead-out end is provided in the width direction of the ground electrode, and the first lead-out end is located on one side of one of the metal outer meshes; The high-voltage electrode is provided with a second lead-out end, and the second lead-out end and the first lead-out end are located on the same side of the low-temperature plasma generator.

9. A low-temperature plasma generator according to claim 7 or 8, characterized in that : The metal outer net is a hexagonal mesh structure.

10. A low-temperature plasma generator according to claim 7 or 8, characterized in that: The high-voltage electrode is composed of a plurality of high-voltage electrode partitions, and each of the high-voltage electrode partitions is connected with gaps; A plurality of discharge holes are provided on each of the high-voltage electrode partitions, and the discharge holes are distributed throughout the entire high-voltage electrode partition.

11. The low-temperature plasma generator according to claim 7 or 8, characterized in that: The dielectric layer is frosted glass.

12. A method for operating a vehicle-mounted air purifier with automatic wind speed control, characterized in that: The operating method is applicable to a vehicle-mounted air purifier with automatic wind speed control as claimed in any one of claims 1 to 6; The operating method includes: the vehicle-mounted air purifier is used in a vehicle, and when the vehicle is started and the air conditioner is turned on, air flows into the wind speed detection channel, the heater is heated, the temperature acquisition module collects temperature data and outputs it to the judgment and control module, the judgment and control module calculates the wind speed based on the temperature difference between the first temperature sensor and the second temperature sensor, starts the low-temperature plasma generator when the wind speed is higher than or equal to a preset wind speed threshold, and turns off the low-temperature plasma generator when there is no wind or the wind speed is less than the preset wind speed threshold.

13. A low-temperature plasma generator comprising a ground electrode, a high-voltage electrode, and a dielectric layer, characterized in that: The grounding electrode is a one-piece grounding electrode, comprising two metal outer mesh areas and a metal connecting piece area located between the two metal outer mesh areas; The metal connecting plate region is provided with at least three half-grooves parallel to the metal outer mesh region, wherein the half-groove located in the middle is a first half-groove, and the other half-grooves are second half-grooves, the second half-groove being symmetrically arranged with respect to the first half-groove, and the two metal outer mesh regions are symmetrically arranged with respect to the first half-groove; The one-piece ground electrode can be folded along the first half groove to form a ground electrode including a guide structure, wherein the guide structure is located on one side in the width direction of the folded one-piece ground electrode, and the guide structure is formed by bending the metal connecting sheet area, and the guide structure has two guide surfaces, each of which is inclined to the metal outer mesh area; The dielectric layer and the high-voltage electrode are located inside the folded one-piece grounding electrode.

14. A low-temperature plasma generator according to claim 13, characterized in that: The one-piece grounding electrode includes two wrapping areas, which are respectively located on the side of the two metal outer mesh areas away from the metal connecting plate. A third half groove is provided on both wrapping areas, and the third half groove is arranged parallel to the first half groove.

15. The low-temperature plasma generator according to claim 13, wherein: The one-piece grounding electrode is provided with a first lead-out end. Along the length direction of the first half groove, the first lead-out end is located on one side of the metal outer mesh area.

16. A low-temperature plasma generator according to claim 15, characterized in that : The high voltage electrode is provided with a second lead-out end. Along the length direction of the first half groove, the second lead-out end and the first lead-out end are located on the same side of the low temperature plasma generator.

17. The low-temperature plasma generator according to claim 13, characterized in that: The metal outer mesh area includes a plurality of hexagonal honeycomb structures, the high-voltage electrode is provided with a plurality of hexagonal structures, and the plurality of hexagonal structures are connected into one by metal sheets; The honeycomb structure of the metal outer mesh area is arranged in a one-to-one correspondence with the hexagonal structure of the high-voltage electrode.

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