An air purifier

Abstract

The application belongs to the technical field of gas treatment, and particularly relates to an air purifier. The application can effectively reduce the gas blind area in the purification air duct, avoid the risk of secondary pollution caused by the deposition of particulate matter, and improve the long-term operation stability of the equipment by forming a slit type air inlet between the shell and the upper cover and adopting the structural design of the flow guide plate and the flow resistance plate in cooperation. Specifically, the design of the slit type air inlet can block the larger dust particles in the air from entering the interior of the equipment. The flow guide plate can physically divide the internal space through special structural design such as a partition rib, guide the airflow to flow in an orderly manner along a preset path by virtue of the downward protruding form, and fundamentally reduce the formation of the initial gas blind area, thereby providing a basic guarantee for the smooth flow of the airflow. On this basis, the flow resistance plate further precisely regulates and controls the airflow distribution, effectively alleviates the local retention possibly caused by the uneven speed, and avoids the generation of new flow defects on the upper surface of the flow guide plate.

Description

Technical Field

[0001] This application belongs to the field of gas treatment technology, and specifically relates to an air purifier with a good gas flow channel design. Background Technology

[0002] In relatively enclosed or poorly ventilated environments, volatile organic compounds such as formaldehyde and benzene, as well as various bacteria, viruses, and other microorganisms, can easily accumulate. Prolonged exposure to such poorly ventilated spaces may trigger respiratory problems, allergic reactions, and even more serious chronic health risks. Therefore, to ensure a safe and hygienic indoor environment, it is essential to implement scientific and effective air purification methods to reduce pollutant concentrations and protect human health.

[0003] Gas discharge plasma technology, with its ability to efficiently generate reactive oxygen species, has become one of the core technologies in modern air purification systems. This technology locally ionizes the air by applying a high-voltage electric field, generating strong oxidizing substances such as hydroxyl radicals, ozone, and negative ions. These active components can actively attack and destroy the cell membranes and other structures of microorganisms, achieving rapid inactivation of bacteria and viruses. Simultaneously, they can gradually oxidize and decompose harmful volatile organic compounds such as formaldehyde and benzene series compounds, converting them into harmless substances such as water and carbon dioxide. Benefiting from its advantages of requiring no consumables, rapid response, and comprehensive purification, this technology has been widely integrated into household and commercial air purification equipment, not only improving overall purification efficiency but also providing technical support for the development of equipment towards miniaturization and low energy consumption. Currently, mainstream air purification equipment typically adopts an integrated duct structure, its core consisting of a shell, return air inlet, supply air inlet, fan, and built-in purification module. Driven by the fan, air enters from the return air inlet and exits through the supply air inlet, forming a continuous airflow circulation. The purification equipment can selectively integrate plasma generators such as dielectric barrier discharge or corona discharge as active oxygen generation units. When polluted air flows through the discharge area, gas molecules are excited and ionized by high-energy electrons, rapidly generating strong oxidizing species such as hydroxyl radicals, ozone, and negative ions. These active components react with airborne pathogens and volatile organic pollutants, achieving dynamic sterilization and degradation, thereby completing the air purification process.

[0004] While gas discharge plasma technology demonstrates excellent sterilization and degradation capabilities in air purification, it reveals significant structural problems during actual equipment integration. Because this technology relies on transformers, power supplies, electrodes, insulating media, corona wires, and complex circuit connections, the internal components of the purifier are densely packed, resulting in a highly compact spatial layout and inevitably creating numerous connection gaps, corners, and recessed areas. These structural features easily induce eddies or sudden drops in velocity when airflow passes through, becoming "blind spots" for particulate matter deposition. Over long-term operation, dust continuously accumulates in these areas, potentially weakening purification performance; more seriously, the accumulated dust itself may adsorb residual organic matter or carry microorganisms, which, under humid or suitable conditions, can breed bacteria, evolving into new sources of pollution and causing secondary pollution. Utility Model Content

[0005] The purpose of this application is to provide an air purifier with good gas flow channels and high long-term operational stability, which is achieved through the following technical solution: An air purifier includes an internal purification duct that communicates with the external gas environment via an intake port and an exhaust port. The purification duct contains a fan assembly for directing gas flow and a discharge assembly for ionizing and purifying the air within it. The purification duct is formed by a housing and a top cover, with the intake port formed by the gap between the housing and the top cover. The fan assembly has an upward-facing air inlet, and a downward-protruding section extending from the inner wall of the housing towards its central axis is provided between the intake port and the air inlet. A guide plate is provided, with its bottom opening aligned axially with and connected to the air inlet. A baffle plate is also provided between the guide plate and the top cover to prevent gas from directly entering the fan assembly along the longitudinal path from the air intake. A main chamber is formed between the lower surface of the guide plate and the housing, and a partition rib extends downward from the lower surface of the guide plate to form a partition rib. The partition rib divides the main chamber into a storage chamber for placing the drive device and a discharge chamber for connecting the air outlet of the fan assembly with the exhaust port. The discharge component is disposed in the discharge chamber.

[0006] The driving device refers to the device that drives the discharge component to discharge in order to generate components such as hydroxyl radicals, negative ions, and ozone, and includes power supply, transformer and wires, etc.

[0007] Preferably, the baffle plate is provided with a drive circuit board for controlling the air purifier to turn on and off.

[0008] Preferably, the drive circuit board is provided with a control switch; the upper cover and the housing are slidably connected up and down by a linear sliding pair, and a trigger part is formed by extending downward from the middle of the upper cover, the trigger part contacting the control switch during the downward movement of the upper cover.

[0009] Preferably, the housing is further provided with an inwardly extending assembly plate for mounting the upper cover; the linear sliding pair includes a sliding axis that passes through the assembly plate and is fixedly connected to the upper cover at one end; a stop piece is provided at the other end of the sliding axis, and the linear sliding pair further includes an elastic element disposed between the upper cover and the assembly plate for abutting the stop piece against the lower surface of the assembly plate.

[0010] Preferably, an airflow guide plate is further provided between the upper cover and the assembly plate. The airflow guide plate includes a fixing ring that is connected to the upper surface of the assembly plate, and a through plate disposed at the center of the fixing ring. The through plate includes a first through hole for sliding connection with the trigger part, and a second through hole that is circumferentially spaced around the outer periphery of the first through hole.

[0011] Preferably, the air intake includes a first air intake disposed between the airflow guide plate and the upper cover, and a second air intake disposed circumferentially at intervals on the side wall of the upper cover; the second air intake is circumferentially offset from the second through hole.

[0012] Preferably, the lower surface of the airflow guide plate is also provided with a locking element that penetrates the assembly plate.

[0013] Preferably, the locking element is circumferentially spaced around the outer periphery of the second through hole, and a third through hole is formed thereon.

[0014] Compared with the prior art, this application has the following beneficial effects: This application, by forming a slit-type air intake between the shell and the top cover, and employing a structural design that combines a baffle plate and a flow deflector, effectively reduces gas blind spots within the purification duct, avoiding the risk of secondary pollution caused by particulate matter deposition, and resulting in higher long-term operational stability of the equipment. Specifically, the slit-type air intake design prevents larger dust particles from entering the equipment, thereby reducing the impact of large particulate pollutants on the operation of the internal fan components. The baffle plate, through its special structural design such as partition ribs, clearly divides the internal space and guides the airflow along a preset path with its downward-protruding shape, fundamentally reducing the formation of initial gas blind spots and providing a basic guarantee for smooth airflow. Furthermore, the flow deflector further precisely controls the airflow distribution, effectively mitigating local stagnation that may be caused by uneven velocity and preventing new flow defects from forming on the surface of the baffle plate. The complementary and synergistic effects of these three components significantly improve the continuity and uniformity of gas flow within the purifier.

[0015] The baffle plate in this application already functions to optimize airflow distribution. Integrating the drive circuit board into it eliminates the need for a separate installation space inside the purifier, especially avoiding the occupation of the main chamber and improving the utilization efficiency of the internal space. Furthermore, this application constructs a simple and efficient opening and closing control mechanism by linking the control switch on the drive circuit board with the sliding action of the top cover. The top cover and the housing are connected by a linear sliding joint, and its up and down movement provides the power source for triggering. The downwardly extending trigger part on the inner side of the top cover acts as a direct actuator, contacting or separating from the control switch as the top cover moves. When the user slides the top cover to open or close the device, this mechanical action is directly converted into a circuit on / off signal, thereby realizing the automatic start and stop control of the device. The entire process does not require additional independent buttons, wiring, or complex transmission mechanisms, which not only reduces structural complexity and manufacturing costs but also improves the reliability and ease of operation of the system, achieving a high degree of integration and natural response between user operation and device control.

[0016] This application incorporates an inwardly extending mounting plate within the housing, serving as an integrated installation base. A linear sliding pair structure, comprising a sliding axis, a stop plate, and an elastic element, is integrated onto this plate, achieving a smooth and stable sliding connection between the top cover and the housing. The elastic element continuously applies preload, ensuring the stop plate remains in close contact with the mounting plate under normal conditions, effectively limiting the position of the top cover and ensuring the structural stability of the air intake, thus guaranteeing the stability of the sliding process.

[0017] This application incorporates an airflow guide plate between the top cover and the mounting plate, with a second through-hole on the airflow guide plate that mates with the second air intake on the side wall of the top cover. This design ensures that the first through-hole can accommodate the trigger unit for on / off linkage, while guiding the airflow entering from the second air intake into the device's interior evenly through the circumferentially distributed second through-holes. This structural synergy effectively avoids airflow concentration or deviation, improves the uniformity and stability of the intake air, and optimizes the gas flow direction inside the device.

[0018] This application features a locking element that penetrates the assembly plate on the lower surface of the airflow guide plate, forming a rigid limiting structure that effectively constrains the relative rotation between the airflow guide plate and the assembly plate. This design ensures that the second through-hole on the airflow guide plate and the second air intake on the side wall of the upper cover always maintain a preset circumferential offset relationship, preventing relative positional shifts due to component rotation. This stabilizes the intake buffering and uniform flow distribution effects, ensuring the consistency of the airflow guiding function. Furthermore, the circumferentially spaced third through-holes on the locking element, while achieving the structural locking function, also create an additional airflow channel. This channel guides gas flow through the upper region of the guide plate, accelerating airflow in that area, preventing airflow stagnation zones caused by structural obstruction, and reducing the possibility of particulate matter deposition in this area. Attached Figure Description

[0019] The attached diagram will be briefly described below: Figure 1 This is a schematic diagram of the overall structure of an air purifier. Figure 2 This is a partial structural diagram of an air purifier. Figure 3 A schematic diagram of the airflow guide plate of an air purifier; Figure 4 A schematic diagram of a structure with a top cover and an airflow guide plate mounted on the assembly plate; Figure 5 A schematic diagram of the installation structure with an airflow guide plate mounted on the assembly plate; Figure 6 This is a structural schematic diagram of the upper cover assembly; Figure 7 This is a schematic diagram of the main chamber structure of an air purifier. Figure 8 A schematic diagram of a structure with a baffle plate installed on the guide plate; Reference numerals: 100, intake port; 110, first intake port; 120, second intake port; 200, exhaust port; 300, fan assembly; 400, discharge assembly; 500, housing; 510, mounting plate; 600, top cover; 610, trigger part; 700, guide plate; 800, baffle plate; 900, linear sliding pair; 910, sliding axis; 920, stop plate; 930, elastic element; 1000, airflow guide plate; 1100, fixing ring; 1200, through plate; 1210, first through hole; 1220, second through hole; 1230, third through hole; 1300, locking element. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Those skilled in the art will be able to implement the present invention based on these descriptions. Furthermore, the embodiments of the present invention described below are generally only a part of the embodiments of the present invention, and not all of the embodiments. Therefore, all other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0021] An air purifier includes a housing 500 and a top cover 600 slidably connected to the housing 500 via a linear sliding pair 900. A slit-type air intake 100 is formed between the housing 500 and the top cover 600. The housing 500 includes a base plate and a side wall surrounding the edge of the base plate and protruding upwards; an exhaust port 200 is provided on the side wall near the base plate. A purification air duct is formed between the air intake 100 and the exhaust port 200, and a fan assembly 300 for driving the gas to flow directionally along the purification air duct is provided on the base plate.

[0022] In this embodiment, the air inlet of the fan assembly 300 faces upward, and a guide plate 700 protruding downward from the inner wall of the housing 500 towards the central axis is provided between the air intake 100 and the air inlet. The bottom opening of the guide plate 700 is axially aligned with and connected to the air inlet. A baffle plate 800 is also provided between the guide plate 700 and the upper cover 600 to prevent gas from directly entering the fan assembly 300 from the air intake 100 along a longitudinal path. By providing the guide plate 700 and the baffle plate, the problem of local gas stagnation caused by uneven gas flow can be effectively avoided.

[0023] In this embodiment, to effectively avoid the problem of gas flow blind spots or particulate matter accumulation areas caused by the layout or structure of the drive device of the drive discharge assembly 400, a main chamber is formed between the lower surface of the guide plate 700 and the housing 500. Furthermore, a partition rib extends downward from the lower surface of the guide plate 700, dividing the main chamber into a storage chamber for housing the drive device and a discharge chamber for connecting the air outlet of the fan assembly 300 to the exhaust port 200. In addition, in this embodiment, the discharge assembly 400 employs a dielectric barrier discharge device, and the dual high voltages of the dielectric barrier discharge device are disposed in the discharge chamber.

[0024] In this embodiment, to simplify the structural design, a drive circuit board for controlling the opening and closing of the air purifier is provided on the baffle plate 800; a control switch is provided on the drive circuit board. The upper cover 600 and the housing 500 are slidably connected vertically via a linear sliding pair 900, and a trigger part 610 extends downward from the middle of the upper cover 600, which contacts the control switch during the downward movement of the upper cover 600. The housing 500 is also provided with an inwardly extending assembly plate 510 for mounting the upper cover 600; the linear sliding pair 900 includes a sliding axis 910 that passes through the assembly plate 510 and is fixedly connected to the upper cover 600 at one end; a stop piece 920 is provided at the other end of the sliding axis 910, and the linear sliding pair 900 also includes an elastic member 930 disposed between the upper cover 600 and the assembly plate 510 to abut the stop piece 920 against the lower surface of the assembly plate 510.

[0025] To optimize the gas flow direction of the intake port 100, an airflow guide plate 1000 is provided between the upper cover 600 and the assembly plate 510. The airflow guide plate 1000 includes a fixing ring 1100 connected to the upper surface of the assembly plate 510, and a through plate 1200 disposed at the center of the fixing ring 1100. The through plate 1200 includes a first through hole 1210 for sliding connection with the trigger part 610, and second through holes 1220 circumferentially spaced around the outer periphery of the first through hole 1210. The intake port 100 includes a first intake port 110 disposed between the airflow guide plate 1000 and the upper cover 600, and second intake ports 120 circumferentially spaced on the side wall of the upper cover 600. The second intake ports 120 and the second through holes 1220 are circumferentially offset. Furthermore, a locking member 1300 penetrating the assembly plate 510 is also provided on the lower surface of the airflow guide plate 1000. The locking member 1300 is circumferentially distributed around the outer periphery of the second through hole 1220, and a third through hole 1230 is formed thereon.

[0026] In use, press down the top cover 600 to move it downwards along the sliding axis 910 until the trigger part 610 contacts the control switch, thereby starting the air purifier. Driven by the fan assembly 300, the gas enters through the second through hole 1220 and the third through hole 1230 and flows to the guide plate 700 and the baffle plate 800. The gas blown directly to the guide plate 700 is smoothly guided into the fan assembly 300 by the guide plate; while the gas blown towards the baffle plate 800 is effectively blocked and cannot enter the fan assembly 300 in a straight line. Instead, it flows to the surrounding guide plate 700 and is then guided into the fan assembly 300 by the guide plate. The gas delivered by the fan assembly 300 then enters the exhaust chamber. At this time, the discharge end of the discharge component located in the exhaust chamber will ionize and generate reactive oxygen species such as hydroxyl radicals. These strong oxidizing substances rapidly act on bacteria and viruses in the airflow as the gas flows through the exhaust chamber, destroying their cell membranes, nucleic acids, and other molecular structures, achieving highly efficient inactivation. Simultaneously, they exhibit excellent oxidative degradation capabilities against volatile organic compounds such as formaldehyde and benzene compounds, gradually decomposing them into harmless substances like water and carbon dioxide, thus achieving deep purification of bacteria and harmful gases. Finally, the thoroughly purified gas is discharged from the exhaust port 200, achieving indoor air circulation and purification.

Claims

1. An air purifier, wherein the air purifier has an internal purification duct that communicates with the external gas environment through an air intake (100) and an exhaust (200); the purification duct is provided with a fan assembly (300) for directing the flow of gas, and a discharge assembly (400) for ionizing and purifying the air in the purification duct; characterized in that, The purification air duct is formed by a housing (500) and a top cover (600), and the gap between the housing (500) and the top cover (600) forms the air intake (100); the air inlet of the fan assembly (300) is arranged facing upwards, and a guide plate (700) is provided between the air intake (100) and the air inlet, protruding downwards from the inner wall of the housing (500) towards the central axis. The bottom opening of the guide plate (700) is axially aligned with and connected to the air inlet; a further arrangement is provided between the guide plate (700) and the top cover (600). A baffle plate (800) is provided to prevent gas from directly entering the fan assembly (300) along the longitudinal path from the air intake (100); a main chamber is formed between the lower surface of the baffle plate (700) and the housing (500), and a partition rib is formed by extending downward on the lower surface of the baffle plate (700). The partition rib divides the main chamber into a storage chamber for placing the drive device and a discharge chamber for connecting the air outlet of the fan assembly (300) with the exhaust port (200). The discharge end of the discharge assembly (400) is disposed in the discharge chamber.

2. An air purifier according to claim 1, characterized in that, The baffle plate (800) is provided with a drive circuit board for controlling the opening and closing of the air purifier.

3. An air purifier according to claim 2, characterized in that, A control switch is provided on the drive circuit board; The upper cover (600) and the housing (500) are slidably connected up and down by a linear sliding pair (900), and a trigger part (610) is formed extending downward from the middle of the upper cover (600). The trigger part (610) contacts the control switch during the downward movement of the upper cover (600).

4. An air purifier according to claim 3, characterized in that, The housing (500) is further provided with an inwardly extending mounting plate (510) for mounting the upper cover (600); the linear sliding pair (900) includes a sliding axis (910) that passes through the mounting plate (510) and is fixedly connected to the upper cover (600) at one end; a stop piece (920) is provided at the other end of the sliding axis (910), and the linear sliding pair (900) further includes an elastic member (930) disposed between the upper cover (600) and the mounting plate (510) for abutting the stop piece (920) against the lower surface of the mounting plate (510).

5. An air purifier according to claim 4, characterized in that, An airflow guide plate (1000) is also provided between the upper cover (600) and the assembly plate (510). The airflow guide plate (1000) includes a fixing ring (1100) connected to the upper surface of the assembly plate (510) and a through plate (1200) disposed at the center of the fixing ring (1100). The through plate (1200) includes a first through hole (1210) for sliding connection with the trigger part (610) and a second through hole (1220) circumferentially spaced around the outer periphery of the first through hole (1210).

6. An air purifier according to claim 5, characterized in that, The air intake (100) includes a first air intake (110) disposed between the airflow guide plate (1000) and the upper cover (600), and a second air intake (120) disposed circumferentially at intervals on the side wall of the upper cover (600); the second air intake (120) and the second through hole (1220) are circumferentially offset.

7. An air purifier according to claim 5, characterized in that, The lower surface of the airflow guide plate (1000) is also provided with a locking element (1300) that penetrates the assembly plate (510).

8. An air purifier according to claim 7, characterized in that, The locking member (1300) is circumferentially spaced around the outer periphery of the second through hole (1220), and a third through hole (1230) is formed thereon.

Images