Air purification device and control method thereof

Abstract

The invention discloses an air purification device and a control method thereof, and relates to the technical field of air purification, the air purification device comprises a shell assembly with an air inlet and an air outlet, and an air flow channel communicated with the air inlet and the air outlet is formed in the shell assembly; the filter element and the discharge unit are arranged in the gas flow channel, the discharge unit is located on the upstream of the filter element, and the discharge unit is used for releasing positive ions and / or negative ions into gas; the air purification device has a first state, in the first state, gas is sucked in from the gas inlet and flows out from the gas outlet through the gas flow channel, and meanwhile, the discharge unit is in a running state. The problem that the service life of the filter element is short can be solved on the basis of saving the cost.

Description

Technical Field

[0001] The present invention relates to the technical field of air purification, and in particular to an air purification device and a control method thereof. Background Art

[0002] An air purifier is a device that removes impurities and purifies polluted air. It can contain a variety of filter elements with different functions to remove and purify the air. The lifespan of filters used to remove tiny particles (such as PM2.5) in the air decreases over time. This is primarily due to two factors: increased resistance caused by the accumulation of filtered particles in the filter element, and the loss of static electricity on the filter material.

[0003] In general, if you want to extend the life of the filter element, that is, if you want the filter element to adsorb more tiny particles per unit area, you have to use higher-grade filter materials, which will undoubtedly greatly increase the production cost of the filter element; or, you have to use more filter materials of the same grade, but this will also increase the production cost of some filter elements and increase the resistance to air flow. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the embodiments of the present invention is to provide an air purification device and a control method thereof, which can solve the problem of short filter life on the basis of cost saving.

[0005] The specific technical solution of the embodiment of the present invention is:

[0006] An air purification device, comprising:

[0007] A housing assembly having an air inlet and an air outlet, wherein a gas flow channel communicating with the air inlet and the air outlet is formed in the housing assembly;

[0008] A filter element and a discharge unit are provided in the gas flow channel, wherein the discharge unit is located upstream of the filter element and is used to release positive ions and / or negative ions into the gas;

[0009] The air purification device has a first state. In the first state, gas is sucked in from the air inlet and flows out from the air outlet through the gas flow channel. At the same time, the discharge unit is in an operating state.

[0010] Preferably, the air purification device further comprises a voltage conversion module, which is used to provide high voltage electricity to the discharge unit; in the first state, the voltage conversion module is in a working state to provide high voltage electricity to the discharge unit.

[0011] Preferably, the air purification device includes: the air purification device has a second state, in which gas is sucked in from the air inlet and flows out from the air outlet through the gas flow channel, and the discharge unit is in a closed state.

[0012] Preferably, the discharge voltage of the discharge unit is between 2.5 kV and 4.5 kV.

[0013] Preferably, the discharge unit includes a plurality of dispersed discharge needles; when the discharge voltage of the discharge unit is in the range of 2.5kV to 3kV, the density of the discharge needles is greater than or equal to 200 / square meter; when the discharge voltage of the discharge unit is in the range of 3kV to 3.5kV, the density of the discharge needles is greater than or equal to 140 / square meter; when the discharge voltage of the discharge unit is in the range of 3.5kV to 4kV, the density of the discharge needles is greater than or equal to 80 / square meter.

[0014] Preferably, the plane in which the discharge needles are distributed is parallel to the extension direction of the filter element.

[0015] Preferably, the tip of the discharge needle faces the incoming direction of the gas.

[0016] Preferably, when the density of the discharge needles is less than or equal to 80 per square meter, the distance between the needle tip of the discharge needle and the filter element is greater than or equal to 1 cm;

[0017] When the density of the discharge needles is less than or equal to 140 per square meter, the distance between the needle tip of the discharge needle and the filter element is greater than or equal to 0.8 cm;

[0018] When the density of the discharge needles is less than or equal to 200 per square meter, the distance between the needle tip of the discharge needle and the filter element is greater than or equal to 0.5 cm.

[0019] Preferably, the discharge unit includes: a frame; a plurality of fixed bars arranged at intervals and fixedly connected to the frame, a first hollow structure is formed between the plurality of fixed bars, and the first hollow structure forms part of the gas flow channel; at least part of the discharge needles are arranged on the side of the fixed bar facing away from the filter element.

[0020] Preferably, the air purification device further comprises: a primary filter element arranged in the gas flow channel, wherein the primary filter element is located upstream of the discharge unit.

[0021] Preferably, the filter element and the discharge unit can be detachably installed in the housing assembly.

[0022] Preferably, the air purification device further comprises a voltage conversion module, and the voltage conversion module is used to provide high voltage electricity to the discharge unit;

[0023] The voltage conversion module is mounted on the housing assembly; the housing assembly has a first electrical connector electrically connected to the voltage conversion module; the discharge unit has a second electrical connector, and the discharge needle of the discharge unit is electrically connected to the second electrical connector;

[0024] When the discharge unit is installed in the gas flow channel, the second electrical connection member contacts the first electrical connection member to achieve electrical conduction.

[0025] Preferably, the filter mesh in the filter element is made of a material that can absorb and retain electric charges.

[0026] Preferably, the filter mesh in the filter element is made of PP.

[0027] Preferably, the level of the filter is lower than or equal to level 13 and higher than or equal to level 9.

[0028] Preferably, the housing assembly comprises: an outer shell and a filter element installation and accommodation mechanism disposed in the outer shell;

[0029] The filter element and the discharge unit are detachably arranged side by side in the filter element installation and accommodation mechanism;

[0030] The air purification device further includes a position limiting protection member, which is mounted on the housing assembly. When the filter element and the discharge unit are arranged side by side in the filter element installation and accommodating mechanism, the position limiting protection member can resist the discharge unit.

[0031] Preferably, the position-limiting protective member is located outside the discharge unit.

[0032] Preferably, the position-limiting protective member has a second hollow structure, and the second hollow structure forms part of the gas flow channel; when the position-limiting protective member is against the discharge unit, the position-limiting protective member, the filter element and the discharge unit are arranged side by side.

[0033] Preferably, the air purification device further comprises a voltage conversion module, which is used to provide high voltage electricity to the discharge unit; the voltage conversion module is installed in the filter element installation and accommodation mechanism.

[0034] Preferably, the filter element and the discharge unit are two independent components.

[0035] Preferably, the air purification device includes one of the following: an air purifier, an air conditioning device with an air purification function, a central air conditioning system with an air purification function, and a fresh air device with an air purification function.

[0036] A control method for an air purification device, the control method comprising:

[0037] Obtaining the current remaining life of the filter element based on the total air volume flowing through the air purification device and the detected air quality data value of the environment in which the air purification device is located;

[0038] When the current remaining life of the filter element decreases by a preset value relative to the rated life of the filter element, the discharge unit is turned on when the air purification device is running to purify the air.

[0039] Preferably, the total air volume flowing through the air purification device is obtained by the air volume level at which the air purification device is operating and the corresponding operating time at the air volume level.

[0040] Preferably, the air quality data value includes a PM2.5 data value.

[0041] Preferably, the current remaining life of the filter element decreases by a preset value relative to the rated life of the filter element. Specifically, the current remaining life of the filter element decreases by a preset percentage relative to the rated life of the filter element.

[0042] The technical solution of the present invention has the following significant beneficial effects:

[0043] When the air purification device is used for a period of time, the number of charges on the filter material in the filter element decreases, resulting in a decrease in the filtering effect of the filter element, and the air purification device can enter the first state. Of course, in other feasible implementation methods, the air purification device can also be in the first state all the time. At this time, when the gas is sucked in from the air inlet and flows out from the air outlet through the gas flow channel, the discharge unit is in an operating state, and the positive ions and / or negative ions released by the discharge unit into the gas can flow through the filter element with the flow of gas, thereby staying on the filter material in the filter element to increase the number of charges on the filter material and replenish the static electricity that disappears or decreases on the filter material. The above method can greatly extend the service life of the filter element and improve the filtering effect of the filter element. In addition, the discharge unit is located upstream of the filter element, which not only enables the positive ions and / or negative ions released by the discharge unit to flow through the filter element, but also the discharge unit and the filter element are independent. Even if the filter element is exhausted and needs to be replaced later, only the filter element needs to be replaced, and it will not affect or require the replacement of other parts in the air purification device, which can further reduce the cost of use. Finally, the static electricity generated by the discharge unit when in operation can cause small particles in the gas flowing through the discharge unit to aggregate, which can increase the probability of the filter element capturing small particles, thereby improving the filtering effect.

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

[0045] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the various components in the drawings are merely illustrative and are used to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the various components of the present invention. Those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to specific circumstances under the guidance of the present invention.

[0046] Figure 1 This is a schematic structural diagram of an air purification device according to an embodiment of the present invention;

[0047] Figure 2 Schematic diagram of an explosion of an air purification device according to an embodiment of the present invention;

[0048] Figure 3 This is an exploded schematic diagram of the filter element installation and accommodation mechanism, filter element, discharge unit and limiting protection component of the air purification device in an embodiment of the present invention.

[0049] Reference numerals in the above drawings:

[0050] 1. Shell assembly; 11. Air inlet; 12. Air outlet; 13. Gas flow channel; 14. First electrical connector; 15. Outer shell; 16. Filter element installation and accommodation mechanism; 2. Filter element; 3. Discharge unit; 31. Discharge needle; 32. Frame; 33. Fixing bar; 34. First hollow structure; 35. Second electrical connector; 4. Voltage conversion module; 5. Limiting protection member; 51. Second hollow structure; 6. Fan. DETAILED DESCRIPTION

[0051] The details of the present invention can be more clearly understood in conjunction with the accompanying drawings and the description of the specific embodiments of the present invention. However, the specific embodiments of the present invention described herein are for illustrative purposes only and are not to be construed as limiting the present invention in any way. Based on the teachings of the present invention, skilled artisans can conceive of any possible variations based on the present invention, all of which should be considered within the scope of the present invention. It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there can be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there can be an intermediate element. The terms "mounted," "connected," and "connected" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, internal communication between two elements, direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of these terms based on the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are intended only to describe specific embodiments and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0053] In order to solve the problem of short filter life on the basis of cost saving, an air purification device is proposed in this application. Figure 1 Schematic diagram of the structure of the air purification device in an embodiment of the present invention. Figure 2 This is a schematic diagram of an explosion of an air purification device according to an embodiment of the present invention. Figure 3 Schematic diagram of the explosion of the filter element installation and accommodation mechanism, the filter element, the discharge unit and the limit protection member of the air purification device according to the embodiment of the present invention. Figures 1 to 3 As shown, the air purification device may include: a shell component 1 having an air inlet 11 and an air outlet 12, a gas flow channel 13 connecting the air inlet 11 and the air outlet 12 is formed in the shell component 1; a filter element 2 and a discharge unit 3 are arranged in the gas flow channel 13, the discharge unit 3 is located upstream of the filter element 2, and the discharge unit 3 is used to release positive ions and / or negative ions into the gas; the air purification device has a first state, in which the gas is sucked in from the air inlet 11 and flows out from the air outlet 12 through the gas flow channel 13, and at the same time, the discharge unit 3 is in an operating state.

[0054] After the air purification device has been used for a period of time, when the amount of charge on the filter material in the filter element 2 decreases, resulting in a decrease in the filtering effect of the filter element 2, the air purification device can enter the first state. Of course, in other feasible embodiments, the air purification device can also remain in the first state. At this time, when the gas is inhaled from the air inlet 11 and flows out from the air outlet 12 through the gas flow channel 13, the discharge unit 3 is in an operating state. The positive ions and / or negative ions released into the gas by the discharge unit 3 can pass through the filter element 2 as the gas flows, and thus stay on the filter material in the filter element 2, thereby increasing the amount of charge on the filter material and replenishing the static electricity that has disappeared or decreased on the filter material.

[0055] The above method can greatly extend the service life of the filter element 2 and improve the filtering effect of the filter element 2. In addition, the discharge unit 3 is located upstream of the filter element 2, which not only allows the positive ions and / or negative ions released by the discharge unit 3 to flow through the filter element 2, but also the discharge unit 3 and the filter element 2 are independent. Even if the filter element 2 expires and needs to be replaced later, only the filter element 2 needs to be replaced, and other components in the air purification device will not be affected or need to be replaced, which can further reduce the cost of use. Finally, the static electricity generated by the discharge unit 3 when it is in operation can cause small particles in the gas flowing through the discharge unit 3 to aggregate, which can increase the probability of the filter element 2 capturing small particles, thereby improving the filtering effect.

[0056] In order to better understand the air purification device in this application, it will be further explained and illustrated below. Figure 1 and Figure 3 As shown, the air purification device includes: a shell assembly 1, a filter element 2 and a discharge unit 3. The shell assembly 1 has an air inlet 11 and an air outlet 12. The air inlet 11 is used to introduce external gas that needs to be filtered, and the air outlet 12 is used to discharge the gas filtered by the filter element 2 out of the air purification device. A gas flow channel 13 connecting the air inlet 11 and the air outlet 12 is formed in the shell assembly 1. External gas flows into the interior of the shell assembly 1 from the air inlet 11, passes through the gas flow channel 13, and is discharged from the air outlet 12. The filter element 2 and the discharge unit 3 are arranged in the gas flow channel 13.

[0057] The air purification device can be any type of device that requires a filter element to purify the air. It can be a conventional air purifier, or various air conditioning devices with air purification functions, central air conditioning systems, fresh air devices, etc.

[0058] In order to allow external gas to flow into the shell assembly 1 from the air inlet 11 , the air purification device may include: a fan 6 , which is used to generate suction, thereby sucking external gas into the shell assembly 1 from the air inlet 11 .

[0059] The discharge unit 3 is used to release positive ions and / or negative ions into the gas. The discharge unit 3 can release positive ions or negative ions into the gas, or the discharge unit 3 can release positive ions and negative ions into the gas simultaneously. Preferably, generally speaking, the discharge unit 3 is used to release negative ions into the gas.

[0060] The discharge unit 3 is located upstream of the filter element 2. The air purification device can have a first state, in which gas is sucked in from the air inlet 11 and flows out from the air outlet 12 through the gas flow channel 13, and the discharge unit 3 is in operation.

[0061] When the air purification device is in the first state, the gas is sucked in from the air inlet 11 and flows out from the air outlet 12 through the gas flow channel 13. The discharge unit 3 is in an operating state. The positive ions and / or negative ions released into the gas by the discharge unit 3 can pass through the filter element 2 as the gas flows, thereby staying on the filter material in the filter element 2 to increase the amount of charge on the filter material and replenish the static electricity that disappears or decreases on the filter material.

[0062] As a feasible embodiment, after the air purification device has been used for a period of time, the amount of charge on the filter material in the filter element 2 decreases, resulting in a decrease in the filtering effect of the filter element 2. The air purification device can enter the first state. In other feasible embodiments, each time the air purification device filters gas, it can remain in the first state. In other words, the discharge unit 3 can continuously replenish the charge of the filter material.

[0063] In order to enable the discharge unit 3 to have high voltage electricity to release positive ions and / or negative ions into the gas, the air purification device includes a voltage conversion module 4, which is used to provide high voltage electricity to the discharge unit 3. In the first state, the voltage conversion module 4 is in an operating state to provide high voltage electricity to the discharge unit 3.

[0064] Alternatively, the air purification device may include a second state. In the second state, gas is drawn in through the air inlet 11 and flows out of the air outlet 12 through the gas flow channel 13, with the discharge unit 3 in a closed state. When the filter material does not need to be charged, the air purification device can be switched to the second state, thereby saving energy. The beneficial effect of the transient charge on the filter material on the filter element 2 is minimal.

[0065] The discharge voltage of the discharge unit 3 can be such that the discharge unit 3 releases positive ions and / or negative ions into the gas. Preferably, an excessively high voltage will cause the discharge unit 3 to release positive ions and / or negative ions into the gas, thereby generating ozone in the air. The discharge voltage of the discharge unit 3 can be controlled between 2.5 kV and 4.5 kV, which can effectively suppress the generation of ozone.

[0066] Furthermore, if Figure 3 As shown, the discharge unit 3 may include multiple dispersed discharge needles 31. The tips of the discharge needles 31 generate a particularly strong field strength, ionizing the air near the tips and generating a large number of ions. The movement of the charged ions is like the charge on the tips being continuously released into the air. Because the discharge needles 31 have pointed tips, they can release a large number of positive and / or negative ions at a relatively low discharge voltage compared to other discharge units 3.

[0067] In order to better enable the discharge needles 31 to form a positive ion and / or negative ion concentration that meets the requirements under the discharge voltage, since the higher the voltage, the higher the concentration of positive ions and / or negative ions formed per unit time, it has been found through research and experiments that when the discharge voltage of the discharge unit 3 is in the range of 2.5kV to 3kV, the density of the discharge needles 31 can be greater than or equal to 200 / m2 to meet the requirements. When the discharge voltage of the discharge unit 3 is in the range of 3kV to 3.5kV, the density of the discharge needles 31 can be greater than or equal to 140 / m2. When the discharge voltage of the discharge unit 3 is in the range of 3.5kV to 4kV, the density of the discharge needles 31 can be greater than or equal to 80 / m2. Through the above, the number of discharge needles 31 can be reduced while meeting the requirements.

[0068] In order to be able to set up a large number of discharge needles 31, the plane in which the discharge needles 31 are distributed is parallel to the extension direction of the filter element 2. This not only allows the discharge needles 31 to be placed in the cross section, but also allows the gas flowing through the filter element 2 to flow through the discharge needles 31. In this way, the positive ions and / or negative ions released by the discharge needles 31 can be distributed more dispersedly in the gas, so that the positive ions and / or negative ions released when flowing through the filter element 2 later can flow through different positions of the filter element 2, thereby replenishing the charge of the filter material at different positions of the filter element 2 in the extension direction.

[0069] As feasible, Figure 3As shown, the tip of the discharge needle 31 can be oriented toward the incoming gas flow direction. This allows the length of the discharge needle 31 to be utilized to increase the distance between the tip of the discharge needle 31 and the filter element 2, thereby preventing the distance between the two from being too close, which would result in the positive ions and / or negative ions released into the gas from the tip of the discharge needle 31 not having enough space to diffuse. The above-mentioned method can also allow the positive ions and / or negative ions released into the gas from the tip of the discharge needle 31 to diffuse and then pass through the filter element 2, so that the filter material at different positions of the filter element 2 can be relatively evenly charged. In addition, the tail of the discharge needle 31 can be closer to the filter element 2, and the discharge unit 3 and the filter element 2 can be arranged more compactly, thereby making the structure of the entire air purification device more compact and smaller in size. In other feasible embodiments, the tip of the discharge needle 31 can also face away from the incoming gas flow direction. The extension direction of the discharge needle 31 can also be perpendicular to the incoming gas flow direction or at a certain angle.

[0070] Furthermore, when the tip of the discharge needle 31 faces the incoming direction of the gas, when the density of the discharge needle 31 is less than or equal to 80 per square meter, the distance between the tip of the discharge needle 31 and the filter element 2 is greater than or equal to 1 cm. When the density of the discharge needle 31 is less than or equal to 140 per square meter, the distance between the tip of the discharge needle 31 and the filter element 2 is greater than or equal to 0.8 cm. When the density of the discharge needle 31 is less than or equal to 200 per square meter, the distance between the tip of the discharge needle 31 and the filter element 2 is greater than or equal to 0.5 cm. The distance between the tip of the discharge needle 31 and the filter element 2 can be reasonably set according to the different placement densities of the discharge needles 31, so that the filter materials at different positions of the filter element 2 can be replenished with electric charge, thereby minimizing the occurrence of dead corners.

[0071] The filter screen in the filter element 2 is made of a material capable of adsorbing and retaining electric charges. Generally speaking, the filter screen in the filter element 2 can be made of PP (polypropylene). Among current filter screen ratings, filter elements 2 with filter screens made of materials capable of adsorbing and retaining electric charges are generally rated at or above Grade 9. Therefore, the air purification device in this application is applicable to any filter element 2 with a Grade 9 filter screen or higher.

[0072] Since conventional air purification devices currently use filter elements 2 in consideration of cost factors as well as comprehensive factors such as filtering effect and lifespan, the level of the filter screen in the filter element 2 is generally less than or equal to level 13, among which the level of the filter screen in the filter element 2 generally used is between level 11 and level 13, with level 12 and level 13 being the most common. Only in some special occasions or specially made air purification devices may a filter element 2 with a filter screen level higher than level 14 be used, and due to its high price, it is not universal at present. The higher the level of the filter screen in the filter element 2, the higher the cost per unit area. However, the higher the level of the filter screen in the filter element 2, the longer its lifespan per unit area, that is, the greater the amount of particles that the filter screen can adsorb per unit area, and therefore its lifespan is also relatively longer.

[0073] In a specific embodiment, Figure 3 As shown, the discharge unit 3 may include: a frame 32; a plurality of fixed bars 33 spaced apart and fixedly connected to the frame 32, with a first hollow structure 34 formed between the plurality of fixed bars 33, the first hollow structure 34 forming part of the gas flow channel 13; and at least a portion of the discharge needles 31 disposed on the side of the fixed bars 33 facing away from the filter element 2. The shape of the frame 32 may correspond to the shape of the filter element 2. When the frame 32 is rectangular, the fixed bars 33 may extend horizontally or vertically, with the ends of the fixed bars 33 connected to two parallel sides of the frame 32. This structure allows the discharge needles 31 to be dispersed and ensures smooth gas flow through the discharge unit 3. In addition, the wires used to power the discharge needles 31 can be laid within the fixed bars 33, allowing for smooth power supply to the discharge needles 31 without causing resistance to the gas.

[0074] In order to avoid affecting the discharge unit 3 when replacing the filter element 2 and eliminating the need to replace the discharge unit 3 together, the filter element 2 and the discharge unit 3 can be two independent components.

[0075] As a feasible method, the air purification device further includes: a primary filter element arranged in the gas flow channel 13 , and the primary filter element is located upstream of the discharge unit 3 .

[0076] As a feasible option, the filter element 2 and the discharge unit 3 can be detachably installed in the housing assembly 1. When the filter element 2 needs to be replaced, if the discharge unit 3 is located on the side where the filter element 2 is removed, the discharge unit 3 can be removed from the housing assembly 1 first, the filter element 2 can be replaced, and then the discharge unit 3 can be reinstalled. In this way, the presence of the discharge unit 3 will not affect the replacement operation of the filter element 2.

[0077] In order to make the discharge unit 3 lighter and easier to remove, the voltage conversion module 4 can be installed on the housing assembly 1. The housing assembly 1 has a first electrical connector 14 electrically connected to the voltage conversion module 4. The discharge unit 3 has a second electrical connector 35, and the discharge needle 31 is electrically connected to the second electrical connector 35. When the discharge unit 3 is installed in the gas flow channel 13, the second electrical connector 35 contacts the first electrical connector 14 to achieve electrical conduction. The above structure can achieve that the discharge unit 3 can be removed from the housing assembly 1, and when it is installed, it can be electrically connected to the voltage conversion module 4 installed on the housing assembly 1, so that the voltage conversion module 4 provides high voltage electricity to the discharge unit 3.

[0078] In order to facilitate the positioning of the discharge unit 3 and the filter element 2 inside the housing assembly 1, and also facilitate the removal and installation of the discharge unit 3 and the filter element 2, as shown in FIG. Figure 2 and Figure 3 As shown, the housing assembly 1 may include an outer housing 15 and a filter cartridge mounting and accommodating mechanism 16 disposed within the outer housing 15. The outer housing 15 serves as the housing for the entire air purification device. An air inlet 11 and an air outlet 12 may be formed on the outer housing 15, and a gas flow channel 13 connecting the air inlet 11 and the air outlet 12 may be formed within the outer housing 15. The outer housing 15 may be composed of at least two parts, one of which is a main housing and the other may be a door panel that can be removed from the main housing to facilitate replacement of the filter cartridge 2. The air inlet 11 may be disposed on the door panel. The interior of the outer housing 15 may include the filter cartridge mounting and accommodating mechanism 16, a fan 6, and other components. The filter cartridge mounting and accommodating mechanism 16 can accommodate the filter cartridge 2 and the discharge unit 3, and is provided with vertical and / or horizontal position limits, as well as position limits in at least one of the front-to-back directions. The filter cartridge 2 and the discharge unit 3 can be removably disposed side by side within the filter cartridge mounting and accommodating mechanism 16. The filter element 2 and the discharge unit 3 are arranged in a direction substantially perpendicular to their own extension direction, so as to form a gas flow channel 13 with a larger cross section.

[0079] In other feasible embodiments, the filter element installation and accommodation mechanism 16 can be integrated with the outer shell 15, and the filter element installation and accommodation mechanism 16 and the outer shell 15 are integrated into one body, and the filter element 2 and the discharge unit 3 can be detachably arranged side by side in the outer shell 15. Alternatively, the filter element installation and accommodation mechanism 16 can be detachably installed in the outer shell 15, and the filter element 2 and the discharge unit 3 can be detachably arranged side by side in the filter element installation and accommodation mechanism 16.

[0080] As feasible, Figure 3As shown, the air purification device may include: a limit protection member 5, which is installed on the shell assembly 1. The limit protection member 5 can be installed on the outer shell 15, or on the filter element installation and accommodating mechanism 16. When the filter element 2 and the discharge unit 3 are arranged side by side in the filter element installation and accommodating mechanism 16, the limit protection member 5 can resist the discharge unit 3. Furthermore, the limit protection member 5 is located on the outside of the discharge unit 3. In the above manner, the discharge unit 3 can resist the filter element 2, and the filter element 2 can resist the filter element installation and accommodating mechanism 16, thereby preventing the filter element 2 and the discharge unit 3 from detaching from the filter element installation and accommodating mechanism 16. For example, the limit protection member 5 can be detachably fastened to the outer shell 15 or the filter element installation and accommodating mechanism 16. Alternatively, one part of the limit protection member 5 can be connected to the outer shell 15 or the filter element installation and accommodating mechanism 16 in a hinged manner, so that the limit protection can be opened to facilitate the installation or removal of the filter element 2 and the discharge unit 3; the other part of the limit protection member 5 can be snapped or clamped with the outer shell 15 or the filter element installation and accommodating mechanism 16 or connected in other detachable ways.

[0081] like Figure 3 As shown, the position limiting protection member 5 may have a second hollow structure 51, which forms part of the gas flow channel 13 so that the gas can pass through the position limiting protection member 5 and flow to the discharge unit 3. When the position limiting protection member 5 is against the discharge unit 3, the position limiting protection member 5, the filter element 2 and the discharge unit 3 are arranged side by side.

[0082] When the housing assembly 1 includes an outer housing 15 and a filter element mounting and accommodating mechanism 16 disposed in the outer housing 15, as feasible, Figure 3 As shown, the voltage conversion module 4 can be installed in the filter element installation and accommodating mechanism 16, so that when the discharge unit 3 is installed in the filter element installation and accommodating mechanism 16, it can be docked with the voltage conversion module 4 so that the voltage conversion module 4 can provide it with high voltage electricity.

[0083] The air purification device in the present application can use the discharge unit 3 to replenish the static electricity that disappears from the filter material in the filter element 2 to alleviate the attenuation of the life of the filter element 2. Through experiments, it was found that, for example, when the level of the filter screen of the filter element 2 in the air purification device is level 12, using the discharge unit 3 to replenish the static electricity that disappears from the filter material in the filter element 2 can make the life of the filter screen reach twice that of the level 13 filter screen. In other words, when a filter element 2 with a level 13 filter screen is originally required, a filter element 2 with a level 12 filter screen can be directly used by adopting the solution in the present application. This not only saves the cost of the filter element 2, but also further reduces the resistance of the filter element 2 to the airflow.

[0084] In addition, the life of the filter element 2 has been further extended, and the frequency of replacing the filter element 2 can be reduced by half. In terms of specific test data, taking a conventional 12-level filter as an example, the unit area life is 6.1g / m 2 The cost of a single surface area is about 12 yuan / m 2 Taking the conventional 13-level filter as an example, the unit area life is 15g / m 2 The cost of a single surface area is about 15 yuan / m 2 Adopting the scheme in this application and using the filter element 2 with 12-level filter screen can make the filter screen life per unit area be 30-35g / m 2 The cost of a single surface area is about 12 yuan / m 2 From the above specific comparison of life per unit area and cost per surface area, it can be found that the air purification device in this application has obvious cost advantages and life advantages of the filter element 2.

[0085] This application also proposes a control method for an air purification device, which can be applied to any of the above-mentioned air purification devices, and can also be applied to other air purification devices.

[0086] The control method in this application may include the following steps:

[0087] S101: Obtain the current remaining life of the filter element 2 according to the total air volume flowing through the air purification device and the detected air quality data value in the environment where the air purification device is located.

[0088] In this step, the total air volume flowing through the air purification device can be obtained by using the air volume level at which the air purification device is operating and the corresponding operating time at that level. The air volume flowing through the air purification device per unit time varies at different air volume levels. The air purification device stores the approximate air volume flowing through the air purification device per unit time at different air volume levels. The air purification device then calculates the corresponding operating time at each air volume level, thereby obtaining the total air volume flowing through the air purification device.

[0089] An air quality detection unit can be installed on the air purification device, which can detect and obtain the air quality data value at the location of the air purification device. For example, the air quality detection unit can be set upstream of the filter element 2 in the gas flow channel 13, or can also be set outside the shell component 1 of the air purification device. The air quality data value can include PM2.5 data value. The air quality data value in the environment where the air purification device is located obtained by detection can be used to obtain the particles contained in each unit air volume passing through the air purification device.

[0090] Combining these two parameters yields the total amount of particles intercepted by filter element 2 at the total air volume flowing through the air purifier. Since a new filter element 2 has a rated total amount of particles it can intercept, comparing the total amount of particles intercepted by filter element 2 at the total air volume flowing through the air purifier with the rated total amount yields the current remaining lifespan of filter element 2. This remaining lifespan can be expressed in various ways, such as as a percentage (e.g., 50% or 70%), or as the amount of particles still capable of interception. Other methods are also possible.

[0091] S102: When the current remaining life of the filter element 2 decreases by a preset value relative to the rated life of the filter element 2, the discharge unit 3 is turned on when the air purification device is running to purify the air.

[0092] In this step, when the current remaining life of the filter element 2 decreases by a preset value relative to the rated life of the filter element 2, the preset value may vary depending on the representation of the life of the filter element 2. For example, when the remaining life of the filter element 2 is expressed as a percentage, the discharge unit 3 is activated when the air purification device is operating to purify the air each time the current remaining life of the filter element 2 decreases by a preset percentage relative to the rated life of the filter element 2. When the remaining life of the filter element 2 is expressed as the amount of particles that can still be intercepted and adsorbed, the discharge unit 3 is activated when the air purification device is operating to purify the air each time the amount of particles that can still be intercepted and adsorbed by the filter element 2 decreases by a preset value.

[0093] In this step, in order to make the rated life of the filter element 2 more accurate, it is feasible that the rated life of the filter element 2 can be the rated life of the filter element 2 measured by using the discharge unit 3 to supplement the charge on the filter material in the filter element 2. In this way, the control method of the present application can more accurately control the frequency of supplementing the charge on the filter material in the filter element 2, so that the actual service life of the filter element 2 is close to the rated life measured in the above manner.

[0094] The control method of the air purification device of the present application can timely activate the discharge unit 3 when the air purification device is operating to purify the air under a controllable premise, thereby replenishing the charge of the filter material in the filter element 2, thereby extending the service life of the filter element 2. By reasonably activating the discharge unit 3 when needed, electricity can be saved, and the possibility of damage caused by a user forcibly disassembling the air purification device and touching the discharge unit 3 during operation of the air purification device can be reduced.

[0095] All articles and references disclosed, including patent applications and publications, are incorporated herein by reference for all purposes. The term "essentially consisting of..." describing a combination should include the identified elements, ingredients, parts or steps and other elements, ingredients, parts or steps that do not substantially affect the basic novel features of the combination. The use of the terms "comprising" or "including" to describe the combination of elements, ingredients, parts or steps herein also contemplates an embodiment that is essentially composed of these elements, ingredients, parts or steps. By using the term "may", it is intended to illustrate that any attribute described that "may" include is optional. Multiple elements, ingredients, parts or steps can be provided by a single integrated element, ingredient, part or step. Alternatively, a single integrated element, ingredient, part or step can be divided into separate multiple elements, ingredients, parts or steps. The disclosure "one" or "an" used to describe an element, ingredient, part or step is not intended to exclude other elements, ingredients, parts or steps.

[0096] Each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the scope of protection of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. An air purification device, characterized in that: The air purification device comprises: A housing assembly having an air inlet and an air outlet, wherein a gas flow channel communicating with the air inlet and the air outlet is formed in the housing assembly; A filter element and a discharge unit are provided in the gas flow channel, wherein the discharge unit is located upstream of the filter element and is used to release positive ions and / or negative ions into the gas; The air purification device has a first state. In the first state, gas is sucked in from the air inlet and flows out from the air outlet through the gas flow channel. At the same time, the discharge unit is in an operating state.

2. The air purification device according to claim 1, characterized in that The air purification device further includes a voltage conversion module, which is used to provide high voltage electricity to the discharge unit. In the first state, the voltage conversion module is in a working state to provide high voltage electricity to the discharge unit.

3. The air purification device according to claim 1, characterized in that The air purification device includes: the air purification device has a second state, in which gas is sucked in from the air inlet and flows out from the air outlet through the gas flow channel, and the discharge unit is in a closed state.

4. The air purification device according to claim 1, characterized in that The discharge voltage of the discharge unit is between 2.5kV and 4.5kV.

5. The air purification device according to claim 4, characterized in that: The discharge unit includes a plurality of dispersed discharge needles; when the discharge voltage of the discharge unit is in the range of 2.5kV to 3kV, the density of the discharge needles is greater than or equal to 200 / square meter; when the discharge voltage of the discharge unit is in the range of 3kV to 3.5kV, the density of the discharge needles is greater than or equal to 140 / square meter; when the discharge voltage of the discharge unit is in the range of 3.5kV to 4kV, the density of the discharge needles is greater than or equal to 80 / square meter.

6. The air purification device according to claim 5, characterized in that: The plane where the discharge needles are distributed is parallel to the extension direction of the filter element.

7. The air purification device according to claim 5, characterized in that The needle tip of the discharge needle faces the incoming flow direction of the gas.

8. The air purification device according to claim 7, characterized in that: When the density of the discharge needles is less than or equal to 80 per square meter, the distance between the needle tip of the discharge needle and the filter element is greater than or equal to 1 cm; When the density of the discharge needles is less than or equal to 140 per square meter, the distance between the needle tip of the discharge needle and the filter element is greater than or equal to 0.8 cm; When the density of the discharge needles is less than or equal to 200 per square meter, the distance between the needle tip of the discharge needle and the filter element is greater than or equal to 0.5 cm.

9. The air purification device according to claim 7, characterized in that: The discharge unit includes: a frame; a plurality of fixed bars arranged at intervals and fixedly connected to the frame, a first hollow structure is formed between the plurality of fixed bars, and the first hollow structure forms part of the gas flow channel; at least part of the discharge needles are arranged on the side of the fixed bar facing away from the filter element.

10. The air purification device according to claim 1, characterized in that The air purification device further includes: a primary filter element arranged in the gas flow channel, and the primary filter element is located upstream of the discharge unit.

11. The air purification device according to claim 1, characterized in that: The filter element and the discharge unit can be detachably installed in the housing assembly.

12. The air purification device according to claim 11, characterized in that: The air purification device further includes a voltage conversion module, which is used to provide high voltage electricity to the discharge unit; The voltage conversion module is mounted on the housing assembly; the housing assembly has a first electrical connector electrically connected to the voltage conversion module; the discharge unit has a second electrical connector, and the discharge needle of the discharge unit is electrically connected to the second electrical connector; When the discharge unit is installed in the gas flow channel, the second electrical connection member contacts the first electrical connection member to achieve electrical conduction.

13. The air purification device according to claim 1, characterized in that The filter screen in the filter element is made of a material that can absorb and retain electric charges.

14. The air purification device according to claim 1, characterized in that The material of the filter screen in the filter element is PP.

15. The air purification device according to claim 13, characterized in that: The level of the filter is lower than or equal to level 13 and higher than or equal to level 9.

16. The air purification device according to claim 1, characterized in that The housing assembly comprises: an outer shell and a filter element installation and accommodation mechanism disposed in the outer shell; The filter element and the discharge unit are detachably arranged side by side in the filter element installation and accommodation mechanism; The air purification device further includes a position limiting protection member, which is mounted on the housing assembly. When the filter element and the discharge unit are arranged side by side in the filter element installation and accommodating mechanism, the position limiting protection member can resist the discharge unit.

17. The air purification device according to claim 16, characterized in that: The limiting protection member is located outside the discharge unit.

18. The air purification device according to claim 16, characterized in that The position limiting protection member has a second hollow structure, which forms part of the gas flow channel; when the position limiting protection member is against the discharge unit, the position limiting protection member, the filter element and the discharge unit are distributed side by side.

19. The air purification device according to claim 16, characterized in that The air purification device further includes a voltage conversion module, which is used to provide high voltage electricity to the discharge unit; the voltage conversion module is installed in the filter element installation and accommodating mechanism.

20. The air purification device according to claim 1, characterized in that The filter element and the discharge unit are two independent components.

21. The air purification device according to claim 1, characterized in that The air purification device includes one of the following: an air purifier, an air conditioning device with an air purification function, a central air conditioning system with an air purification function, and a fresh air device with an air purification function.

22. A control method for an air purification device, characterized in that: The control method includes: Obtaining the current remaining life of the filter element based on the total air volume flowing through the air purification device and the detected air quality data value of the environment in which the air purification device is located; When the current remaining life of the filter element decreases by a preset value relative to the rated life of the filter element, the discharge unit is turned on when the air purification device is running to purify the air.

23. The control method of the air purification device according to claim 22, characterized in that: The total air volume flowing through the air purification device is obtained by the air volume level at which the air purification device is running and the corresponding running time at the air volume level.

24. The control method of the air purification device according to claim 22, characterized in that: The air quality data value includes a PM2.5 data value.

25. The control method of the air purification device according to claim 22, characterized in that: The current remaining life of the filter element decreases by a preset value relative to the rated life of the filter element. Specifically, the current remaining life of the filter element decreases by a preset percentage relative to the rated life of the filter element.

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