Filter screen assembly, air purifier and control method and control device of air purifier

Abstract

The invention relates to the technical field of air purification, and discloses a filter screen assembly, an air purifier and a control method and a control device of the air purifier, the filter screen assembly comprises a fixing structure, a filter screen fixing structure and a control structure, the fixing structure comprises a fixed filter screen, and the fixed filter screen is cylindrical; the primary filtering structure is provided with a first end and a second end, the first end and the second end are suitable for being in butt joint in the circumferential direction of the fixed filter screen so that the primary filtering structure can surround the fixed filter screen, and the first end and the second end are detachably connected and / or the primary filtering structure and the fixed structure are detachably connected. When the primary filtering structure needs to be detached for replacement or cleaning after being used for a period of time, the first end and the second end are separated, or after the first end or the second end of the primary filtering structure is separated from the fixing structure, the primary filtering structure is unfolded on the outer side, and therefore the primary filtering structure is detached from the fixing structure; and the primary filtering structure is convenient to disassemble.

Description

Technical Field

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

[0002] With the development and progress of society, people's requirements for air quality are constantly increasing, and the application of air purifiers in daily life is becoming more and more common. In the related technology, the cylindrical integrated composite filter in the air purifier usually integrates the primary filter layer, the activated carbon layer and the HEPA filter; after long-term use, the large particles such as dust and hair adsorbed by the primary filter layer reach saturation, which will hinder the air intake of the air purifier and cause the filter to become blocked and fail. Under certain conditions, it will also cause secondary pollution and even affect the life of the motor. Since the integrated composite filter cannot be washed with water, and the cleaning effect of simply cleaning the primary filter layer is not good, if the activated carbon layer and the HEPA filter are not saturated, the integrated composite filter will be replaced, which is neither environmentally friendly nor convenient, causing waste of resources while increasing the user's usage cost. Summary of the invention

[0003] In view of this, the present invention provides a filter assembly, an air purifier and a control method and a control device thereof to solve the problem of high cost of replacing the entire filter.

[0004] In a first aspect, the present invention provides a filter assembly, comprising:

[0005] The fixed structure includes a fixed filter screen, wherein the fixed filter screen is cylindrical;

[0006] A primary filter structure, the primary filter structure having a first end and a second end, the first end and the second end being suitable for docking along the circumference of the fixed filter so that the primary filter structure surrounds the fixed filter, the first end and the second end are detachably connected and / or the primary filter structure is detachably connected to the fixed structure.

[0007] Beneficial effect: When the filter assembly is used, the air first passes through the primary filter structure on the outside to filter large particles such as dust and hair in the air, and then passes through the fixed filter. Since the first end and the second end of the primary filter structure are suitable for docking along the circumference of the fixed filter so that the primary filter structure surrounds the fixed filter, the first end and the second end are detachably connected and / or the primary filter structure is detachably connected to the fixed structure. When the primary filter structure needs to be disassembled for replacement or cleaning after being used for a period of time, the first end and the second end are separated, or after the first end or the second end of the primary filter structure is separated from the fixed structure, the primary filter structure is unfolded on the outside, so that the primary filter structure can be disassembled from the fixed structure, which is convenient for disassembly of the primary filter structure.

[0008] In an optional embodiment, the primary filtering structure has an axial end, and the axial end is detachably connected to the fixing structure.

[0009] Beneficial effect: Since the axial end of the primary filter structure is detachably connected to the fixed structure, the axial direction of the primary filter structure can be positioned. When disassembling, the connection between the axial end and the fixed structure can be released, which is convenient for disassembly.

[0010] In an optional embodiment, the fixing structure has a first engaging portion, and the axial end has a second engaging portion, and the second engaging portion is engaged with the first engaging portion.

[0011] Beneficial effect: The fixed structure has a first clamping part, and the axial end has a second clamping part, and the second clamping part is clamped with the first clamping part, so the fixing and disassembly of the primary filter structure is simple and convenient. When disassembling the primary filter structure, after releasing the connection between the first clamping part and the second clamping part at the first end or the second end, the primary filter structure is unfolded on the outside of the fixed filter screen, so that the primary filter structure is disassembled from the fixed structure.

[0012] In an optional embodiment, the second engaging portion is a spring buckle, and the first engaging portion is a slot.

[0013] Beneficial effect: by making the second engaging part into a spring buckle and the first engaging part into a slot, the spring buckle is arranged on the primary filter structure, and when the primary filter structure needs to be disassembled, it is easier to disengage the spring buckle from the slot.

[0014] In an optional embodiment, the surfaces of the spring buckle and the slot are curved.

[0015] Beneficial effect: Since the surfaces of the spring buckle and the card slot are curved, they have a guiding effect, making it easy to quickly clip the spring buckle into the card slot.

[0016] In an optional embodiment, the second engaging portion is connected to a connecting belt.

[0017] Beneficial effect: By connecting the second clamping part with a connecting belt, when the primary filter structure needs to be disassembled, the connecting belt is pulled hard by hand, and the connecting belt drives the second clamping part to separate from the first clamping part. Then, the primary filter structure is unfolded on the outside of the fixed filter screen, thereby removing the primary filter structure from the fixed structure.

[0018] In an optional embodiment, the primary filter structure includes a bracket and a primary filter screen connected to the bracket, and the second clamping portion is disposed on the bracket.

[0019] Beneficial effects: The primary filter structure includes a bracket and a primary filter screen connected to the bracket, and the second clamping portion is arranged on the bracket. The setting of the bracket can support the primary filter screen to prevent the primary filter screen from deformation, and at the same time facilitate the setting of the second clamping portion.

[0020] In an optional embodiment, the support is a hollow structure.

[0021] Beneficial effect: Since the bracket is a hollow structure, it can effectively reduce the weight of the bracket while further reducing wind resistance and increasing the filtering area.

[0022] In an optional embodiment, the bracket at least includes a head end bracket provided at the first end and a tail end bracket provided at the second end, and both the head end bracket and the tail end bracket are provided with the second clamping portion.

[0023] Beneficial effect: The bracket includes at least a head end bracket arranged at the first end and an end bracket arranged at the second end, which can effectively support the primary filter screen. The head end bracket and the end bracket are both provided with a second clamping part. After the second clamping part on the head end bracket and the end bracket is clamped with the first clamping part of the fixed structure, the primary filter structure can be surrounded outside the fixed filter screen.

[0024] In an optional embodiment, the support further includes an intermediate support arranged in the middle of the primary filter screen.

[0025] Beneficial effect: The bracket includes a head bracket arranged at the first end, a terminal bracket arranged at the second end, and an intermediate bracket arranged at the middle of the primary filter screen, which can effectively support the primary filter screen.

[0026] In an optional embodiment, the fixing structure is provided with a first Velcro tape, and the axial end is provided with a second Velcro tape, and the second Velcro tape is bonded to the first Velcro tape.

[0027] Beneficial effect: The fixed structure is provided with a first Velcro, and the axial end is provided with a second Velcro, and the second Velcro is bonded to the first Velcro, which can effectively fix the primary filter structure in the axial direction and facilitate the disassembly and separation of the primary filter structure and the fixed structure.

[0028] In an optional embodiment, the fixed structure includes a top cover located at the top end of the fixed filter screen, and a base located at the bottom end of the fixed filter screen, and the top cover and / or the base are provided with a limiting groove, and the first Velcro is fixed to the limiting groove.

[0029] Beneficial effect: The top cover and the base can provide fixed support for the fixed filter screen. By providing a limiting groove on the top cover and / or the base, the first Velcro is fixed in the limiting groove, which facilitates the positioning of the first Velcro and also limits the axial position of the primary filter structure.

[0030] In an optional embodiment, the primary filter structure includes a bracket and a primary filter screen connected to the bracket, and a limiting belt is provided at the axial end of the primary filter screen, and the limiting belt is connected to the second Velcro, and the limiting belt is suitable for being embedded in the limiting groove.

[0031] Beneficial effects: A limiting belt is provided at the axial end of the primary filter screen, which can support the primary filter screen. The limiting belt is connected to the second Velcro, and the limiting belt is suitable for being embedded in the limiting groove. When the limiting belt is embedded in the limiting groove, the second Velcro is bonded to the first Velcro, which can effectively provide axial limiting support for the primary filter screen, thereby helping to improve the positioning reliability of the primary filter screen, and also helping to improve the sealing between the primary filter screen and the top cover and the base, avoiding air leakage, and preventing the unsupported primary filter screen from collapsing due to the pressure of airflow during use, which in turn causes the primary filter screen to be blocked or leak air.

[0032] In a second aspect, the present invention further provides an air purifier, comprising the filter assembly.

[0033] In a third aspect, the present invention further provides a control method for an air purifier, which is applied to the air purifier, and the control method comprises:

[0034] Get the current gear position G and actual wind pressure;

[0035] Calculate the wind pressure difference X between the actual wind pressure at the current gear and the ideal wind pressure corresponding to the current gear;

[0036] If the wind pressure difference is within the first preset range, the purification speed at the current gear is corrected according to the wind pressure difference X.

[0037] Beneficial effect: Since the remaining service life of the fixed filter of the air purifier is related to the average concentration of the purified matter per unit time, the average purification speed, the total mass currently adsorbed and the preset mass replacement threshold, for the filter assembly composed of the primary filter and the fixed filter, the purification speed needs to consider the size of the gear, the mass adsorbed by the fixed filter and the change in the wind pressure difference caused when the primary filter is blocked. Therefore, when the wind pressure difference is in the first preset range, the purification speed under the current gear is corrected according to the wind pressure difference X, so that the life of the fixed filter can be predicted more accurately.

[0038] In an optional implementation, the control method further includes:

[0039] If the wind pressure difference is within the second preset range, it is prompted to replace or clean the primary filter structure.

[0040] Beneficial effect: If the wind pressure difference is within the second preset range, it is prompted to replace or clean the primary filter structure to avoid affecting the purification speed.

[0041] In an optional implementation manner, the wind pressure difference is within a second preset range, and the control method further includes:

[0042] Determine whether the current gear position G is greater than 1;

[0043] If not, the purification speed at the current gear is corrected according to the wind pressure difference X;

[0044] If so, determining whether the wind pressure difference exceeds a preset ratio of a maximum value of a second preset range;

[0045] If the wind pressure difference exceeds a preset ratio of the maximum value of the second preset range, the gear position of the air purifier is controlled to switch to gear 1;

[0046] If the wind pressure difference does not exceed the preset ratio of the maximum value of the second preset range, maintain or switch the gear of the air purifier to gear 2.

[0047] Beneficial effect: If the wind pressure difference exceeds the preset ratio of the maximum value of the second preset range, the gear of the air purifier is controlled to switch to the lowest gear, so as to maximize the protection of the motor and extend the service life of the motor to avoid long-term high-load operation.

[0048] In an optional implementation, the control method further includes:

[0049] If the wind pressure difference is within the third preset range, the air purifier is controlled to standby, and a prompt is given to replace or clean the primary filter structure.

[0050] Beneficial effect: If the wind pressure difference is within the third preset range, it indicates that the primary filter is in a severely clogged state. At this time, the system is forced to enter the standby state and is prompted to replace or clean the primary filter structure.

[0051] In a fourth aspect, the present invention further provides a control device for an air purifier, which is applied to the air purifier, and the control device comprises:

[0052] The acquisition module is used to obtain the current gear position G and the actual wind pressure;

[0053] A calculation module, used to calculate the wind pressure difference X between the actual wind pressure at the current gear and the ideal wind pressure corresponding to the current gear;

[0054] The control module is used to correct the purification speed at the current gear according to the wind pressure difference X when the wind pressure difference is within the first preset range. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0056] Figure 1 is a schematic diagram of a filter assembly according to an embodiment of the present invention;

[0057] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0058] Figure 3 It is a schematic diagram when the primary filter structure is not completely fixed in the fixed structure;

[0059] Figure 4 is a schematic diagram of a fixed structure;

[0060] Figure 5 for Figure 4 The enlarged view of point B in the middle;

[0061] Figure 6 It is a schematic diagram of the primary filter structure when it is unfolded;

[0062] Figure 7 is a schematic diagram of the bracket;

[0063] Figure 8 The present invention is a flowchart of a method for controlling an air purifier according to an embodiment of the present invention.

[0064] Description of reference numerals:

[0065] 1. Fixed structure; 101. Fixed filter; 102. First clamping part; 103. First Velcro; 104. Top cover; 105. Base; 106. Limiting groove; 2. Primary filtering structure; 201. Second clamping part; 202. Connecting belt; 203. Primary filter; 204. Head end bracket; 205. End bracket; 206. Middle bracket; 207. Second Velcro; 208. Limiting belt. DETAILED DESCRIPTION

[0066] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0067] With the development and progress of society, people's requirements for air quality are constantly increasing, and the application of air purifiers in daily life is becoming more and more common. In the related technology, the cylindrical integrated composite filter in the air purifier usually integrates the primary filter layer, the activated carbon layer and the HEPA filter; after long-term use, the large particles such as dust and hair adsorbed by the primary filter layer reach saturation, which will hinder the air intake of the air purifier and cause the filter to become blocked and fail. Under certain conditions, it will also cause secondary pollution and even affect the life of the motor. Since the integrated composite filter cannot be washed with water, and the cleaning effect of simply cleaning the primary filter layer is not good, if the activated carbon layer and the HEPA filter are not saturated, the integrated composite filter will be replaced, which is neither environmentally friendly nor convenient, causing waste of resources while increasing the user's usage cost.

[0068] The related technology discloses a method and system for predicting the life of an air purifier purification device; the remaining service life of the air purifier filter is calculated mainly based on the average concentration of the purified substance per unit time, the average purification speed, the current total mass adsorbed and the preset mass replacement threshold.

[0069] The purification speed is related to the working gear and is affected by the total mass of the actual adsorbed purified matter. Therefore, linear functions of different gears are used to represent the linear correspondence between the total adsorbed mass and the purification speed at different gears. The preset mass replacement threshold is measured under experimental conditions: by placing multiple groups of air purifier purification devices to be tested in a ventilation system with different concentrations of purified matter and fixed wind speeds until the experiment is terminated, and by calculating the difference between the adsorbed mass and the initial mass of each group of filter purification devices, the average total adsorbed mass can be obtained, which is the preset mass replacement threshold.

[0070] Combine the following Figures 1 to 8 , describing an embodiment of the present invention.

[0071] According to an embodiment of the present invention, in a first aspect, a filter assembly is provided, comprising a fixing structure 1 and a primary filtering structure 2.

[0072] Among them, the fixed structure 1 includes a fixed filter screen 101, which is cylindrical; the primary filter structure 2 has a first end and a second end, and the first end and the second end are suitable for docking along the circumference of the fixed filter screen 101 so that the primary filter structure 2 surrounds the fixed filter screen 101, and the first end and the second end are detachably connected and / or the primary filter structure 2 and the fixed structure 1 are detachably connected.

[0073] In this embodiment, when the filter assembly is in use, the air first passes through the outer primary filter structure 2 to filter large particles such as dust and hair in the air, and then passes through the fixed filter 101. Since the first end and the second end of the primary filter structure 2 are suitable for docking along the circumference of the fixed filter 101 so that the primary filter structure 2 surrounds the fixed filter 101, the first end and the second end are detachably connected and / or the primary filter structure 2 is detachably connected to the fixed structure 1. When the primary filter structure 2 needs to be disassembled for replacement or cleaning after being used for a period of time, the first end and the second end are separated, or the first end or the second end of the primary filter structure 2 is separated from the fixed structure 1, as shown in FIG. Figure 3 , unfold the primary filter structure 2 on the outside, so as to remove the primary filter structure 2 from the fixed structure 1, which is convenient for disassembling the primary filter structure 2.

[0074] Specifically in one embodiment, the primary filter structure 2 has an expanded state and an installed state. When the primary filter structure 2 is in the expanded state, the overall shape is rectangular. When the primary filter structure 2 is in the installed state outside the fixed structure 1, the primary filter structure 2 is overall cylindrical.

[0075] Specifically in one embodiment, the fixed filter 101 is a composite filter, including a HEPA filter.

[0076] Specifically in one embodiment, when the first end is detachably connected to the second end, the primary filter structure 2 may have no connection with the fixed structure 1 , and the primary filter structure 2 is only surrounded by the fixed filter screen 101 .

[0077] Specifically in one embodiment, there is no connection between the first end and the second end, and the primary filtering structure 2 and the fixed structure 1 are detachably connected.

[0078] Specifically in one embodiment, the first end and the second end can be detachably connected, and the primary filtering structure 2 and the fixed structure 1 can be detachably connected.

[0079] In this embodiment, the first end and the second end are preferably not connected, and the primary filtering structure 2 and the fixed structure 1 are detachably connected.

[0080] In one embodiment, the primary filtering structure 2 has an axial end, and the axial end is detachably connected to the fixing structure 1 .

[0081] In this embodiment, since the axial end of the primary filter structure 2 is detachably connected to the fixed structure 1, the primary filter structure 2 can be positioned axially. When disassembling, the connection between the axial end and the fixed structure 1 can be released, which is convenient for disassembly.

[0082] Specifically in one embodiment, combined with Figure 1 and Figure 6 , the axial end refers to the upper and lower ends.

[0083] It should be noted that the detachable connection between the axial end of the primary filter structure 2 and the fixed structure 1 may refer to the detachable connection between several points of the axial end of the primary filter structure 2 and the fixed structure 1, or may refer to the detachable connection between a circle of the axial end and the fixed structure 1.

[0084] The primary filtering structure 2 may be detachably connected to the fixing structure 1 at the upper and lower ends of the first end and the second end.

[0085] In one embodiment, the fixing structure 1 has a first engaging portion 102 , and an axial end thereof has a second engaging portion 201 , and the second engaging portion 201 is engaged with the first engaging portion 102 .

[0086] In this embodiment, the fixed structure 1 has a first engaging portion 102, and a second engaging portion 201 at the axial end, and the second engaging portion 201 is engaged with the first engaging portion 102, so that the fixing and disassembly of the primary filter structure 2 is simple and convenient. When disassembling the primary filter structure 2, after releasing the connection between the first engaging portion 102 and the second engaging portion 201 at the first end or the second end, the primary filter structure 2 is unfolded outside the fixed filter screen 101, so that the primary filter structure 2 is disassembled from the fixed structure 1.

[0087] In one embodiment, the second engaging portion 201 is a spring buckle, and the first engaging portion 102 is a slot.

[0088] In this embodiment, the second engaging portion 201 is a spring buckle, the first engaging portion 102 is a slot, and the spring buckle is arranged on the primary filter structure 2. When the primary filter structure 2 needs to be disassembled, it is easier to disengage the spring buckle from the slot.

[0089] Specifically, when the primary filter structure 2 needs to be disassembled, the spring buckle can be pulled out of the slot by pulling the spring buckle hard on the outside.

[0090] In one embodiment, the surfaces of the spring buckle and the slot are curved.

[0091] In this embodiment, since the surfaces of the spring buckle and the slot are curved, they have a guiding effect, making it easy to quickly clip the spring buckle into the slot.

[0092] In one embodiment, the second engaging portion 201 is connected to a connecting belt 202 .

[0093] In this embodiment, the second locking portion 201 is connected with a connecting belt 202. When the primary filter structure 2 needs to be disassembled, the connecting belt 202 is pulled forcefully by hand, and the connecting belt 202 drives the second locking portion 201 to separate from the first locking portion 102. Then, the primary filter structure 2 is unfolded on the outside of the fixed filter screen 101, thereby removing the primary filter structure 2 from the fixed structure 1.

[0094] Specifically in one embodiment, the connecting belt 202 may be provided only on the second clamping parts 201 at the upper and lower ends of the first end, and the second clamping parts 201 at other positions may not be provided with the connecting belt 202. When it is necessary to disassemble the primary filter structure 2, the connecting belt 202 is pulled by hand, and the connecting belt 202 drives the second clamping part 201 at the first end to separate from the first clamping part 102, and then the primary filter structure 2 is unfolded on the outside of the fixed filter screen 101, so as to remove the primary filter structure 2 from the fixed structure 1.

[0095] Specifically in one embodiment, Figure 7 As shown, the connecting belt 202 has a ring shape suitable for the palm to pass through, so that the user can hold the connecting belt 202 conveniently.

[0096] In one embodiment, the primary filter structure 2 includes a bracket and a primary filter screen 203 connected to the bracket, and the second engaging portion 201 is disposed on the bracket.

[0097] In this embodiment, the primary filter structure 2 includes a bracket and a primary filter screen 203 connected to the bracket, and the second clamping portion 201 is arranged on the bracket. The setting of the bracket can support the primary filter screen 203 to prevent the primary filter screen 203 from deformation, and at the same time facilitate the setting of the second clamping portion 201.

[0098] Specifically in one embodiment, the bracket is a plastic part, and the second engaging portion 201 is integrally formed with the bracket.

[0099] In one embodiment, the stent is a hollow structure.

[0100] In this embodiment, since the bracket is a hollow structure, the weight of the bracket can be effectively reduced while further reducing wind resistance and increasing the filtering area.

[0101] Specifically in one embodiment, Figure 7 As shown, the bracket includes two vertical beams and a plurality of horizontal beams connected between the two vertical beams and arranged at intervals.

[0102] Specifically in one embodiment, the primary filter 203 can be fixed to the bracket by bonding or by heat welding.

[0103] In one embodiment, the bracket at least includes a head end bracket 204 disposed at the first end and a tail end bracket 205 disposed at the second end, and both the head end bracket 204 and the tail end bracket 205 are provided with a second engaging portion 201 .

[0104] In this embodiment, the bracket at least includes a head end bracket 204 arranged at the first end and an end bracket 205 arranged at the second end, which can effectively support the primary filter 203. The head end bracket 204 and the end bracket 205 are both provided with a second clamping portion 201. After the second clamping portion 201 on the head end bracket 204 and the end bracket 205 is clamped with the first clamping portion 102 of the fixed structure 1, the primary filter structure 2 can be surrounded outside the fixed filter 101.

[0105] In one embodiment, the support further includes an intermediate support 206 disposed at the middle of the primary filter 203 .

[0106] In this embodiment, if Figure 6 As shown, the bracket includes a head bracket 204 arranged at the first end, an end bracket 205 arranged at the second end, and an intermediate bracket 206 arranged at the middle of the primary filter screen 203, which can effectively support the primary filter screen 203.

[0107] Specifically, in one embodiment, the middle bracket 206 is also provided with a second engaging portion 201 , which increases the connection point with the fixing structure 1 and can effectively prevent the primary filter 203 from being deformed.

[0108] In one embodiment, the fixing structure 1 is provided with a first Velcro 103 , and a second Velcro 207 is provided at an axial end, and the second Velcro 207 is bonded to the first Velcro 103 .

[0109] In this embodiment, the fixed structure 1 is provided with a first Velcro 103, and a second Velcro 207 is provided at the axial end. The second Velcro 207 is bonded to the first Velcro 103, which can effectively fix the primary filter structure 2 in the axial direction and facilitate the disassembly and separation of the primary filter structure 2 from the fixed structure 1.

[0110] In one embodiment, the first hook and loop fastener 103 is formed into a ring or a nearly ring shape, and the second hook and loop fastener 207 is equal in length to the first hook and loop fastener 103. The first hook and loop fastener 103 may have a fur surface, and the second hook and loop fastener 207 may have a hook surface, so that the second hook and loop fastener 207 and the first hook and loop fastener 103 can be bonded.

[0111] In an embodiment not shown in the figure, the first Velcro 103 and the second Velcro 207 may not be provided, and a first magnetic attraction portion is provided on the fixed structure 1, and a second magnetic attraction portion is provided on the axial end, and the first magnetic attraction portion and the second magnetic attraction portion are connected by magnetic attraction force.

[0112] In one embodiment, the fixed structure 1 includes a top cover 104 located at the top of the fixed filter 101, and a base 105 located at the bottom of the fixed filter 101. The top cover 104 and / or the base 105 are provided with a limiting groove 106, and the first Velcro 103 is fixed to the limiting groove 106.

[0113] In this embodiment, the top cover 104 and the base 105 can provide fixed support for the fixed filter screen 101. By providing a limiting groove 106 on the top cover 104 and / or the base 105, the first Velcro 103 is fixed to the limiting groove 106, which facilitates the positioning of the first Velcro 103 and also limits the axial position of the primary filter structure 2.

[0114] Specifically in one embodiment, both the top cover 104 and the base 105 are provided with a limiting groove 106 , and the limiting groove 106 extends in the circumferential direction.

[0115] In one embodiment, the primary filter structure 2 includes a bracket and a primary filter screen 203 connected to the bracket. A limiting belt 208 is provided at the axial end of the primary filter screen 203. The limiting belt 208 is connected to the second Velcro 207. The limiting belt 208 is suitable for being embedded in the limiting groove 106.

[0116] In this embodiment, a limiting belt 208 is provided at the axial end of the primary filter 203, and the limiting belt 208 can support the primary filter 203. The limiting belt 208 is connected to the primary filter 203 and the second Velcro 207. The limiting belt 208 is suitable for being embedded in the limiting groove 106. When the limiting belt 208 is embedded in the limiting groove 106, the second Velcro 207 is bonded to the first Velcro 103, which can effectively provide axial limiting support for the primary filter 203, thereby helping to improve the positioning reliability of the primary filter 203, and also helping to improve the sealing between the primary filter 203 and the top cover 104 and the base 105, avoiding air leakage, and preventing the unsupported primary filter 203 from collapsing due to the pressure of airflow during use, thereby causing the primary filter 203 to be blocked or leak.

[0117] It should be noted that, for an air purifier with a small air volume, the primary filter 203 can be fixed axially only by connecting the first Velcro 103 and the second Velcro 207 .

[0118] In one embodiment, the limiting belt 208 is a rubber belt. The connection between the rubber belt and the primary filter screen 203 can be achieved by heat welding, where the connection between the rubber belt and the primary filter screen 203 is softened by heating, and then they are bonded together under pressure, and then they are tightly bonded after cooling. In addition, the connection between the rubber belt and the primary filter screen 203 can also be achieved by adhesive or sewing.

[0119] The primary filter 203 is specifically made of PET material.

[0120] In an alternative embodiment, the limiting belt 208 can be made of fabric such as nylon belt, which is light and flexible and can provide users with more appearance color options.

[0121] According to an embodiment of the present invention, in a second aspect, an air purifier is also provided, comprising a filter assembly.

[0122] When the air purifier is in use, the air first passes through the outer primary filter structure 2 to filter large particles such as dust and hair in the air, and then passes through the fixed filter 101. Since the first end and the second end of the primary filter structure 2 are suitable for docking along the circumference of the fixed filter 101 so that the primary filter structure 2 surrounds the fixed filter 101, the first end and the second end are detachably connected and / or the primary filter structure 2 is detachably connected to the fixed structure 1. When the primary filter structure 2 needs to be disassembled for replacement or cleaning after being used for a period of time, the first end and the second end are separated, or after the first end or the second end of the primary filter structure 2 is separated from the fixed structure 1, the primary filter structure 2 is unfolded on the outside, so that the primary filter structure 2 is disassembled from the fixed structure 1, which is convenient for disassembling the primary filter structure 2.

[0123] According to an embodiment of the present invention, in a third aspect, a control method for an air purifier is further provided, which is applied to the air purifier provided in the above embodiment, such as Figure 8 As shown, the control method includes:

[0124] Get the current gear position G and actual wind pressure;

[0125] Calculate the wind pressure difference X between the actual wind pressure at the current gear and the ideal wind pressure corresponding to the current gear;

[0126] If the wind pressure difference is within the first preset range, the purification speed at the current gear is corrected according to the wind pressure difference X.

[0127] In this embodiment, since the remaining service life of the fixed filter 101 of the air purifier is related to the average concentration of the purified matter per unit time, the average purification speed, the total mass currently adsorbed, and the preset mass replacement threshold, for the filter assembly composed of the primary filter 203 and the fixed filter 101 in the above embodiment, the purification speed needs to consider the size of the gear, the mass adsorbed by the fixed filter 101, and the change in the wind pressure difference caused when the primary filter 203 is blocked. Therefore, when the wind pressure difference is in the first preset range, the purification speed under the current gear is corrected according to the wind pressure difference X, so that the life of the fixed filter 101 can be predicted more accurately.

[0128] It should be noted that the purification rate refers to the amount of purified matter that can actually be adsorbed per unit time.

[0129] For the fixed filter 101, the preset mass replacement threshold is M, the total mass currently adsorbed is N, the number of gears is G, the purification speed per unit time is V, and the wind pressure difference is the wind pressure difference X in the air duct when the primary filter 203 is completely unblocked and working normally and when it is actually used. However, when the primary filter 203 is blocked, the wind pressure in the air duct decreases and X increases; therefore, the size of the purification speed per unit time is V=C G (X)·F G (N), where F G (N) is the purification speed corresponding to the total mass N adsorbed by the current composite filter when the primary filter 203 is not blocked under different gears. The larger the gear, the greater the purification speed. The larger N, the smaller the purification speed. At the same time, the influence of N on V at a high gear is greater than that at a low gear. C G (X) is the correction coefficient of the wind pressure difference X caused by the blockage of the primary filter 203 on the purification speed under different gears. The greater the blockage of the primary filter 203, the greater X is, and C G The smaller (X), the smaller V; the concentration of the purified substance per unit time is H, and the unit time is t.

[0130] C G (X) and F G The (N) function can be fitted based on a large amount of experimental data.

[0131] For example:

[0132] The unit time is 1 / 60h, that is, the new adsorption mass per unit time: Δm1=C G (X)·F G (N)·H·t. Then the new adsorption mass in the next unit time: Δm2=C G (X)·F G (N+Δm1)·H·t. If the service life information is updated every 1 hour, the remaining service life is:

[0133] The unit time and life display time are adjustable. The shorter the unit time, the more accurate the life prediction.

[0134] Specifically in one embodiment, Figure 8 As shown, after the air purifier is turned on, the total mass N that has been adsorbed by the fixed filter 101 is first obtained.

[0135] Specifically, in one embodiment, considering that when the blockage conditions are the same and the gears are different, the wind pressure difference reflecting the blockage degree of the filter is also different; therefore, the blockage degree of the primary filter 203 is divided into light, medium and heavy blockage, and the wind pressure differences corresponding to the three blockage degrees at different gears are A, B, C, D, D, E, E, F, F, and F, respectively. G , B G and C G , G is the gear number, G can be 1, 2, 3.

[0136] For example, when the current gear is 1st gear, the minimum wind pressure difference corresponding to a light congestion is A1, the minimum wind pressure difference corresponding to a moderate congestion is B1, and the minimum wind pressure difference corresponding to a heavy congestion is C1.

[0137] When the current gear is 2nd gear, the minimum wind pressure difference corresponding to a light congestion is A2, the minimum wind pressure difference corresponding to a moderate congestion is B2, and the minimum wind pressure difference corresponding to a heavy congestion is C2.

[0138] When the current gear is 3rd gear, the minimum wind pressure difference corresponding to a light congestion is A3, the minimum wind pressure difference corresponding to a moderate congestion is B3, and the minimum wind pressure difference corresponding to a heavy congestion is C3.

[0139] In one embodiment, the first preset range is when the primary filter 203 is slightly clogged, specifically when the wind pressure difference is A G <X≤B G hour.

[0140] In one embodiment, the control method further includes:

[0141] If the wind pressure difference is within the second preset range, it is prompted to replace or clean the primary filter structure 2.

[0142] In this embodiment, if the wind pressure difference is within the second preset range, it is prompted to replace or clean the primary filter structure 2 to avoid affecting the purification speed.

[0143] In one embodiment, the second preset range is when the primary filter 203 is slightly clogged, specifically when the wind pressure difference is B G <X≤C G hour.

[0144] Specifically in one embodiment, if the wind pressure difference is within the second preset range, the prompt light flashes to prompt the primary filter structure 2 to be replaced or cleaned.

[0145] In one embodiment, the wind pressure difference is within a second preset range, and the control method further includes:

[0146] Determine whether the current gear position G is greater than 1;

[0147] If not, the purification speed at the current gear is corrected according to the wind pressure difference X;

[0148] If so, determining whether the wind pressure difference exceeds a preset ratio of a maximum value of a second preset range;

[0149] If the wind pressure difference exceeds a preset ratio of the maximum value of the second preset range, the gear position of the air purifier is controlled to switch to gear 1;

[0150] If the wind pressure difference does not exceed the preset ratio of the maximum value of the second preset range, maintain or switch the gear of the air purifier to gear 2.

[0151] In this embodiment, if the wind pressure difference exceeds a preset ratio of the maximum value of the second preset range, the gear of the air purifier is controlled to switch to the lowest gear in order to maximize the protection of the motor, extend the service life of the motor, and avoid long-term high-load operation.

[0152] In one embodiment, the preset ratio is 95%. If the current gear position is greater than 1, it is determined whether X is greater than 95% C. G If yes, switch to gear 1, otherwise keep or switch the controller's gear to gear 2, in order to maximize the protection of the motor, extend the motor's service life, and avoid long-term high-load operation.

[0153] In one embodiment, if X>95%C G , control the gear of the air purifier to switch to gear 1, and then correct the purification speed under the current gear; if X≤95%C G , control the gear of the air purifier to switch to gear 1, and then correct the purification speed under the current gear.

[0154] In one embodiment, the control method further includes:

[0155] If the wind pressure difference is within the third preset range, the air purifier is controlled to standby, and a prompt is given to replace or clean the primary filter structure 2.

[0156] In this embodiment, if the wind pressure difference is within the third preset range, it indicates that the primary filter 203 is in a severely blocked state. At this time, the machine is forced to enter the standby state and is prompted to replace or clean the primary filter structure 2. The user can disassemble the primary filter structure 2 in the same manner as in the above embodiment.

[0157] In one embodiment, the third preset range is when the primary filter 203 is severely clogged, specifically when the wind pressure difference is X>C G If X>C G The warning light is always on, prompting you to replace or clean the primary filter structure 2.

[0158] Specifically in one embodiment, the control method further includes:

[0159] If 0 <X≤A G When the primary filter 203 is not blocked, the life monitoring module of the fixed filter 101 works normally, and there is no need to correct the purification speed.

[0160] like Figure 8 As shown, if the primary filter 203 is not blocked, the gear can be kept working normally or the user can reselect the gear to work normally, and N, X, and G can be updated in real time.

[0161] It should be noted that after the purification speed in the current gear is corrected, the gear can be kept working normally or the user can reselect the gear to work normally, and N, X, and G can be updated in real time.

[0162] Specifically in one embodiment, the air purifier enters a standby state after being turned on, and the user selects different gears according to the needs to make the air purifier enter a working state. Since the service life of the air purifier filter can be statistically analyzed and predicted according to factors such as the purification speed, environmental pollutant concentration, and usage time under different usage conditions; wherein, the purification speed is mainly controlled by different gears, and is affected by the actual total mass adsorbed by the fixed filter 101 (composite filter). In addition, considering the clogging and failure of the primary filter, the purification speed will also be affected by the clogging of the primary filter 203. Therefore, according to different gears G, after the air purifier has been working stably for a period of time, the difference X between the ideal wind pressure and the actual wind pressure when there is no clogging under the current gear G can be obtained in real time through the wind pressure sensor: when 0 <X≤A G When the primary filter 203 is not blocked, the composite filter life monitoring module works normally, and there is no need to correct the purification speed; when the wind pressure difference is A G <X≤B G When the primary filter 203 is in a slightly blocked state, the air purifier still works normally. However, in order to avoid the blockage of the primary filter 203 affecting the purification speed of the composite filter, the purification speed under the current gear should be corrected according to the current wind pressure difference V=C G (X)·F G (N); When the wind pressure difference is B G <X≤C G When the primary filter 203 is in a moderately blocked state, the air purifier flashes to display a prompt to clean or replace the primary filter. If the current gear position is greater than 1, it is determined whether the current wind pressure X is greater than 95%C G If yes, switch to gear 1, otherwise switch or continue to maintain gear 2, in order to maximize the protection of the motor and extend the service life of the motor to avoid long-term high-load operation; when the wind pressure difference is X>C GWhen the primary filter 203 is in a severely clogged state, the machine is forced to enter the standby state, and the reminder to clean or replace the primary filter is always displayed. When the air purifier flashes or always displays a reminder to clean or replace the primary filter, the user can disassemble the primary filter structure 2 for cleaning or replacement in the off state according to the prompt.

[0163] According to an embodiment of the present invention, in a fourth aspect, a control device for an air purifier is further provided, which is applied to the air purifier provided in the above embodiment, and the control device includes:

[0164] The acquisition module is used to obtain the current gear position G and the actual wind pressure;

[0165] A calculation module, used to calculate the wind pressure difference X between the actual wind pressure at the current gear and the ideal wind pressure corresponding to the current gear;

[0166] The control module is used to correct the purification speed at the current gear according to the wind pressure difference X when the wind pressure difference is within the first preset range.

[0167] Since the remaining service life of the fixed filter 101 of the air purifier is related to the average concentration of the purified matter per unit time, the average purification speed, the total mass currently adsorbed, and the preset mass replacement threshold, for the filter assembly consisting of the primary filter 203 and the fixed filter 101 in the above embodiment, the purification speed needs to consider the size of the gear, the mass adsorbed by the fixed filter 101, and the change in the wind pressure difference caused when the primary filter 203 is blocked. Therefore, when the wind pressure difference is in the first preset range, the purification speed under the current gear is corrected according to the wind pressure difference X, so that the life of the fixed filter 101 can be predicted more accurately.

[0168] The further functional description of each of the above modules and units is the same as that of the above corresponding embodiments and will not be repeated here.

[0169] The control device in this embodiment is presented in the form of a functional unit, where the unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0170] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the present application.

Claims

1. A filter assembly, characterized in that: include: The fixed structure (1) comprises a fixed filter screen (101), wherein the fixed filter screen (101) is cylindrical; A primary filter structure (2), the primary filter structure (2) having a first end and a second end, the first end and the second end being suitable for docking along the circumference of the fixed filter screen (101) so that the primary filter structure (2) surrounds the fixed filter screen (101), the first end and the second end being detachably connected and / or the primary filter structure (2) and the fixed structure (1) being detachably connected.

2. The filter assembly according to claim 1, characterized in that: The primary filtering structure (2) has an axial end, and the axial end is detachably connected to the fixing structure (1).

3. The filter assembly according to claim 2, characterized in that: The fixing structure (1) has a first clamping portion (102), and the axial end has a second clamping portion (201), and the second clamping portion (201) is clamped with the first clamping portion (102).

4. The filter assembly according to claim 3, characterized in that: The second engaging portion (201) is a spring buckle, and the first engaging portion (102) is a slot.

5. The filter assembly according to claim 4, characterized in that: The surfaces of the spring buckle and the slot are curved.

6. The filter assembly according to any one of claims 3 to 5, characterized in that: The second engaging portion (201) is connected to a connecting belt (202).

7. The filter assembly according to any one of claims 3 to 5, characterized in that: The primary filter structure (2) comprises a bracket and a primary filter screen (203) connected to the bracket, and the second engaging portion (201) is arranged on the bracket.

8. The filter assembly according to claim 7, characterized in that: The support is a hollow structure.

9. The filter assembly according to claim 7, characterized in that: The bracket at least comprises a head end bracket (204) arranged at the first end and a tail end bracket (205) arranged at the second end, and both the head end bracket (204) and the tail end bracket (205) are provided with the second clamping portion (201).

10. The filter assembly according to claim 9, characterized in that: The support further comprises an intermediate support (206) arranged at the middle of the primary filter (203).

11. The filter assembly according to any one of claims 2 to 5 and 8 to 10, characterized in that: The fixing structure (1) is provided with a first hook and loop fastener (103), and the axial end is provided with a second hook and loop fastener (207), and the second hook and loop fastener (207) is bonded to the first hook and loop fastener (103).

12. The filter assembly according to claim 11, characterized in that: The fixed structure (1) comprises a top cover (104) located at the top end of the fixed filter (101), and a base (105) located at the bottom end of the fixed filter (101), the top cover (104) and / or the base (105) being provided with a limiting groove (106), and the first Velcro (103) being fixed to the limiting groove (106).

13. The filter assembly according to claim 12, characterized in that: The primary filter structure (2) comprises a bracket and a primary filter screen (203) connected to the bracket, and a limiting belt (208) is provided at the axial end of the primary filter screen (203), and the limiting belt (208) is connected to the second Velcro (207), and the limiting belt (208) is suitable for being embedded in the limiting groove (106).

14. An air purifier, characterized in that: The filter assembly comprises the filter assembly according to any one of claims 1 to 13.

15. A control method for an air purifier, characterized in that: Applied to the air purifier of claim 14, the control method comprises: Get the current gear position G and actual wind pressure; Calculate the wind pressure difference X between the actual wind pressure at the current gear and the ideal wind pressure corresponding to the current gear; If the wind pressure difference is within the first preset range, the purification speed at the current gear is corrected according to the wind pressure difference X.

16. The control method of the air purifier according to claim 15, characterized in that: The control method further comprises: If the wind pressure difference is within the second preset range, a prompt is given to replace or clean the primary filter structure (2).

17. The control method of the air purifier according to claim 16, characterized in that: The wind pressure difference is within a second preset range, and the control method further includes: Determine whether the current gear position G is greater than 1; If not, the purification speed at the current gear is corrected according to the wind pressure difference X; If so, determining whether the wind pressure difference exceeds a preset ratio of a maximum value of a second preset range; If the wind pressure difference exceeds a preset ratio of the maximum value of the second preset range, the gear position of the air purifier is controlled to switch to gear 1; If the wind pressure difference does not exceed the preset ratio of the maximum value of the second preset range, maintain or switch the gear of the air purifier to gear 2.

18. The control method of an air purifier according to any one of claims 15 to 17, characterized in that: The control method further comprises: If the wind pressure difference is within the third preset range, the air purifier is controlled to be in standby mode, and a prompt is given to replace or clean the primary filter structure (2).

19. A control device for an air purifier, characterized in that: Applicable to the air purifier according to claim 14, the control device comprises: The acquisition module is used to obtain the current gear position G and the actual wind pressure; A calculation module, used to calculate the wind pressure difference X between the actual wind pressure at the current gear and the ideal wind pressure corresponding to the current gear; The control module is used to correct the purification speed at the current gear according to the wind pressure difference X when the wind pressure difference is within the first preset range.

Images