Air purification equipment

Abstract

The utility model belongs to the technical field of air purification, and provides air purification equipment which comprises a machine body provided with an air inlet and an air outlet, and the air inlet and the air outlet form an air channel in the machine body; the induced draft fan is arranged at the air duct; one of the at least two filtering assemblies is arranged at the air duct, so that airflow entering from the air inlet is forced to pass through the filtering assemblies under the action of the induced draft fan; the desorption cavity is formed in the machine body and located outside the air duct, a desorption part is arranged in the desorption cavity, and the desorption cavity is configured to contain the other one or more to-be-recovered filter assemblies so that substances adsorbed to the filter assemblies can be desorbed through the desorption part. According to the air purification equipment, two or more filtering assemblies are alternately used, on one hand, performance recovery of the failed filtering assembly can be improved, on the other hand, continuous operation of the air purification equipment can be kept, and the use experience feeling of a user is improved.

Description

Technical Field

[0001] The present application relates to the technical field of air purification, and in particular to an air purification device. Background Art

[0002] In air purifiers, there is usually activated carbon in the filter element to absorb VOC (volatile organic compounds) gas or other impurities in the air. It is easy to saturate. After long-term saturation, impurities may produce odor. Activated carbon adsorbs VOCs in general, which is more effective in the early stage. After long-term use, users cannot judge whether the activated carbon is fully adsorbed. They can only replace the activated carbon after blowing out the odor. For the replaced activated carbon, VOC gas is usually released under sunlight, thereby restoring some of the performance of the activated carbon.

[0003] However, the above-mentioned method of restoring activated carbon through sunlight irradiation, on the one hand, relies solely on light, has low efficiency and limited performance recovery; on the other hand, after the activated carbon is taken out of the air purifier, the entire machine is in a state of stopping working, affecting user use. Utility Model Content

[0004] An embodiment of the present application provides an air purification device, which can improve the performance recovery of failed filter components by using two or more filter components alternately, and on the other hand, can maintain the continuous operation of the air purification device and improve the user experience.

[0005] The present application provides an air purification device, including:

[0006] A machine body, having an air inlet and an air outlet, wherein the air inlet and the air outlet form an air duct within the machine body;

[0007] An induced draft fan is arranged at the air duct;

[0008] At least two filter assemblies, one of which is disposed at the air duct so as to force the airflow entering from the air inlet to pass through the filter assembly under the action of the induced draft fan;

[0009] A desorption cavity is formed in the body and is located outside the air duct. A desorption attachment is provided in the desorption cavity. The desorption cavity is configured to accommodate the remaining one or more filter components to be restored so as to analyze the substances adsorbed on the filter components through the desorption attachment.

[0010] In a feasible implementation, the body includes an upper shell and a lower shell, and the upper shell and the lower shell are detachably connected;

[0011] The air inlet, the air outlet and the induced draft fan are arranged on the upper shell, and the desorption cavity is at least partially located in the lower shell.

[0012] In a feasible implementation, the lower shell is configured with a receiving slot opening toward the upper shell, and the release attachment is located in the receiving slot;

[0013] The upper shell comprises a bottom plate, and the bottom plate is used to abut against the top edge of the filter assembly, so as to enclose the desorption chamber through the bottom plate, the side wall of the filter assembly and the lower shell.

[0014] In a feasible implementation, the lower shell is configured with a receiving groove opening toward the upper shell;

[0015] The upper shell includes a bottom plate for sealing the opening to enclose the desorption cavity together with the lower shell.

[0016] In a feasible implementation, a sealing ring is provided at the lower edge of the bottom plate and / or the top edge of the lower shell, and the sealing ring is used to improve the air tightness of the desorption cavity formed by snapping the upper shell and the lower shell.

[0017] In a feasible implementation, the lower shell is configured with a receiving groove opening toward the upper shell;

[0018] The air purification device comprises a cover plate, which is used to seal the opening so as to enclose the desorption cavity together with the lower shell, and the bottom of the upper shell abuts against the cover plate.

[0019] In a feasible implementation, the filter assembly includes an activated carbon filter element;

[0020] The air purification device also includes a replacement reminder component, which is arranged at the body and is used to remind the replacement of the activated carbon filter element located at the air duct and the activated carbon filter element in the desorption chamber.

[0021] In a feasible implementation, the replacement prompt component includes:

[0022] A warning light is arranged outside the body;

[0023] A first VOC sensor is disposed at the outlet of the filter assembly in the air duct and outputs a first VOC value;

[0024] A second VOC sensor is located outside the housing and outputs a second VOC value;

[0025] The controller is electrically connected to the first VOC sensor and the second VOC sensor respectively, and receives the first VOC value and the second VOC value to calculate the adsorption efficiency of the filter component located in the air duct, and controls the prompt light to change the prompt color when the adsorption efficiency is lower than a threshold.

[0026] In a feasible implementation, the solution attachment is an ozone generator;

[0027] A fan is provided in the desorption chamber and is located at one side of the desorption attachment so that the ozone generated by the desorption attachment is evenly distributed in the desorption chamber.

[0028] In a feasible implementation, the desorption chamber is further provided with a clamping member to fix the filter assembly located in the desorption chamber;

[0029] An ultraviolet lamp is also arranged in the desorption chamber, and the ultraviolet lamp is arranged on one side of the filter component.

[0030] The air purification device provided in the embodiment of the present application realizes the function of adsorbing and purifying the gas in the air duct by setting at least two filter components in the air purification device, and setting one of the filter components in the air duct to keep it in working state, and the other one or more filter components are set in the desorption chamber, so that the desorption attachment in the desorption chamber can analyze and process the organic matter adsorbed by the filter component. This method of using two or more filter components alternately can improve the performance recovery of the failed filter component on the one hand, and on the other hand, it can maintain the continuous operation of the air purification device and improve the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 is a schematic diagram of the overall structure of an air purification device provided according to an embodiment of the present application;

[0033] Figure 2 This is one of the cross-sectional structural schematic diagrams of an air purification device provided according to an embodiment of the present application;

[0034] Figure 3 yes Figure 2 A schematic diagram of the structure enlargement at the center A;

[0035] Figure 4This is the second schematic cross-sectional structure diagram of the air purification device provided according to the embodiment of the present application.

[0036] Reference numerals:

[0037] 100, machine body; 101, air inlet; 102, air outlet; 103, air duct; 110, upper shell; 111, bottom plate; 120, lower shell; 121, receiving slot;

[0038] 200, induced draft fan;

[0039] 300, filter component;

[0040] 400, Unzip attachment;

[0041] 500. Metal mesh cover. DETAILED DESCRIPTION

[0042] The following is a further detailed description of the implementation of the present application in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application but cannot be used to limit the scope of the present application.

[0043] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0044] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0045] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0046] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0047] Activated carbon is a carbon material with high specific surface area and porosity, and has excellent adsorption performance. The activated carbon adsorption and desorption device uses this characteristic of activated carbon to adsorb VOC organic waste gas on the surface of activated carbon, thereby achieving the purpose of purifying waste gas. When the activated carbon is saturated with adsorption, the organic matter adsorbed on the activated carbon is analyzed through the desorption process, recycled and reused, and the waste gas is processed as a resource.

[0048] Take air purifiers as an example. After absorbing VOC gas or other impurities in the air, the activated carbon filter inside is easy to be saturated. When saturated, the usually adopted method is to replace the new activated carbon filter. This method is easy to waste the activated carbon filter and increase the cost of using the air purifier. Alternatively, the replaced activated carbon filter is exposed to sunlight to restore some of its performance. However, this method relies solely on light, which is inefficient and slow to recover performance. On the other hand, after the activated carbon filter is removed from the air purifier, the whole is in a state of stopping working, which affects the user's use.

[0049] Based on the above problems, the present invention provides an air purification device. Figure 1 is a schematic diagram of the overall structure of an air purification device provided according to an embodiment of the present application; Figure 2 is one of the cross-sectional structural schematic diagrams of the air purification device provided according to the embodiment of the present application; Figure 1and Figure 2 As shown, the air purification device may include a body 100, an induced draft fan 200, at least two filter assemblies 300 and a desorption chamber.

[0050] The body 100 is constructed with an air inlet 101 and an air outlet 102, and the air inlet 101 and the air outlet 102 form an air duct 103 in the body 100; the induced draft fan 200 is arranged in the air duct 103; at least two filter components 300, one of which is arranged in the air duct 103, so that the air flow entering from the air inlet 101 is forced to pass through the filter component 300 under the action of the induced draft fan 200; a desorption cavity is formed in the body 100, and the desorption cavity is located outside the air duct 103, and a desorption attachment 400 is arranged in the desorption cavity, and the desorption cavity is configured to receive the remaining one or more filter components 300 to be restored, so as to analyze the substances adsorbed on the filter component 300 through the desorption attachment 400.

[0051] It can be understood that the present application utilizes other areas outside the air duct 103 of the body 100 to construct a desorption chamber to place the replaced filter component 300, and removes organic substances such as formaldehyde adsorbed by the filter component 300 through the desorption attachment 400 arranged inside it to restore the performance of the filter component 300, so as to facilitate the next placement in the air duct 103 for air filtration treatment.

[0052] It should be noted that the decomposition accessory 400 in this example can be a photocatalyst, an ozone generator, ultraviolet rays, a plasma generator, etc. The decomposition accessory 400 can decompose the harmful substances in the filter component 300 that adsorbs harmful gases such as VOCs to restore the performance of the filter component 300.

[0053] In order to avoid affecting the flow of gas in the air duct 103, the desorption chamber is set outside the air duct 103 or at the body 100 away from the air duct 103 in this example. For example, the body 100 is cylindrical as a whole, the air inlet 101 is opened on the side wall of the body 100, the air outlet 102 is at the top of the body 100, and the interior of the body 100 is hollow, so as to form the air duct 103 at the air inlet 101 and the air outlet 102. In order to reasonably utilize the space of the body 100 and avoid affecting the air duct 103, the desorption chamber can be set at the bottom of the body 100.

[0054] The desorption chamber can be a receiving groove 121 set at the bottom of the body 100. The receiving groove 121 has an opening facing the inside of the body 100 or the side wall of the body 100. The opening is used for the filter component 300 to pass through and be placed in the desorption chamber. In order to achieve the airtightness of the desorption chamber and avoid the escape of ozone during the action of the desorption accessory 400, a cover body can be set at the opening. The cover body can be set inside the body 100 or on the side wall of the body 100 to form a sealed cover on the receiving groove 121.

[0055] Of course, the desorption chamber in this example can be used as a storage space for storing a processing box body with a desorption attachment 400 inside. The processing box body can be taken out from the desorption chamber, so that the user can place the expired filter component 300 after opening it from the outside. After the placement is completed, the processing box body is placed in the desorption chamber, so that the processing box body can be taken out from the desorption chamber when the filter component 300 at the air duct 103 is replaced next time.

[0056] In addition, in this example, multiple desorption chambers can be formed in the body 100 to facilitate the placement of multiple filter components 300. Of course, multiple filter components 300 can also be placed in the same desorption chamber. In order to save resources, there are usually two filter components 300 in an air purification device, one is placed in the air duct 103 to adsorb and purify the external gas, and the other (the failed filter component 300 adsorbed with VOC gas) is placed in the desorption chamber to perform the analysis operation through the desorption attachment 400 inside it.

[0057] In the present application, at least two filter components 300 are arranged in the air purification device, and one of the filter components 300 is arranged at the air duct 103 to keep it in working state, so as to realize the function of adsorbing and purifying the gas in the air duct 103, and one or more other filter components 300 are arranged in the desorption chamber, so that the desorption attachment 400 in the desorption chamber can analyze and process the organic matter adsorbed by the filter component 300. This method of using two or more filter components 300 alternately can improve the performance recovery of the failed filter component 300 on the one hand, and on the other hand, it can maintain the continuous operation of the air purification device and improve the user experience.

[0058] Figure 3 yes Figure 2 A schematic diagram of the structure enlargement at the center A; Figure 4 This is a second schematic diagram of the cross-sectional structure of the air purification device provided according to the embodiment of the present application. Figure 1 -Attached Figure 4 The detailed structure of the air purification device provided in the embodiment of the present application is introduced.

[0059] like Figure 2 , Figure 4 As shown, in some embodiments, the body 100 includes an upper shell 110 and a lower shell 120, and the upper shell 110 and the lower shell 120 are detachably connected; the air inlet 101, the air outlet 102 and the induced draft fan 200 are arranged on the upper shell 110, and the desorption chamber is at least partially located in the lower shell 120.

[0060] Specifically, in order to ensure the integrity of the body 100 and the external aesthetics of the air purification device, the opening of the desorption chamber for placing the filter assembly 300 is set inside the body 100 in this example. In order to facilitate the replacement of the filter assembly 300, the body 100 is designed to be a detachably connected upper shell 110 and a lower shell 120, and the induced draft fan 200, the air duct 103 and one of the filter assemblies 300 are arranged in the upper shell 110 to achieve the air purification function; and the lower shell 120 is used to form a partial desorption chamber, for example, in one example, the lower shell 120 is configured with a receiving groove 121 opening toward the upper shell 110; the air purification device includes a cover plate, which is used to seal the opening to enclose the desorption chamber with the lower shell 120, and the bottom of the upper shell 110 abuts on the cover plate.

[0061] It is understandable that, in order to achieve the sealing of the desorption chamber, a cover plate adapted to the opening of the receiving groove 121 is provided. When the filter assembly 300 needs to be replaced, the upper shell 110 and the lower shell 120 can be disassembled, and the failed filter assembly 300 in the upper shell 110 can be removed, and the cover plate covering the lower shell 120 can be removed, and the filter assembly 300 after the performance recovery in the receiving groove 121 can be replaced, and the cover plate can be sealed on the lower shell 120. In order to further increase the sealing of the desorption chamber, the bottom of the upper shell 110 can be made to abut against the cover plate, that is, the cover plate is pressed down so that the edge of the cover plate is tightly connected to the lower shell 120.

[0062] It should be noted that a circle of sealing rubber can be provided at the outer edge of the bottom of the cover plate to improve the sealing of the desorption cavity formed after the cover plate and the lower shell 120 are buckled together, so as to facilitate the escape of ozone generated after the desorption accessory 400 is started.

[0063] Of course, in addition to the above-mentioned method of setting the cover plate to form the desorption cavity, it can also be, for example Figure 3 As shown, in some embodiments, the lower shell 120 is constructed with a receiving groove 121 opening toward the upper shell 110, and the desorption attachment 400 is located in the receiving groove 121; the upper shell 110 includes a bottom plate 111, and the bottom plate 111 is used to abut against the top edge of the filter assembly 300, so as to enclose a desorption cavity through the bottom plate 111, the side wall of the filter assembly 300 and the lower shell 120.

[0064] Specifically, in this example, the structure of the machine body 100 can be cylindrical, then the upper shell 110 and the lower shell 120 are correspondingly set to be cylindrical, and the filter assembly 300 arranged in the air duct 103 is also set to be cylindrical, and in order to ensure that the wind flows from bottom to top, the side wall of the cylindrical filter assembly 300 is set to be a sealing plate. Due to the structural particularity of the filter assembly 300, in order to further reduce the materials used in the air purification equipment, the receiving groove 121 constructed in the lower shell 120 is only used to accommodate the decontamination attachment 400 and the auxiliary tools of the fan and ultraviolet lamp described below, and the filter assembly 300 can be arranged between the upper shell 110 and the lower shell 120. For example, the lower end of the filter assembly 300 can be protruding to set a circle of edges, and the edges are adapted to be inserted in the receiving groove 121. The bottom plate 111 of the upper shell 110 is adapted to the upper end surface of the filter assembly 300, that is, the sealing cover can be arranged on the upper end surface of the filter assembly 300, then, a sealed desorption chamber is formed by the lower shell 120, the side wall of the filter assembly 300 and the bottom plate 111 of the upper shell 110. This arrangement is also conducive to placing or taking the filter assembly 300.

[0065] Of course, in addition to the above-mentioned method of setting a cover plate to form a desorption cavity, in some embodiments, the lower shell 120 is constructed with a receiving groove 121 opening toward the upper shell 110; the upper shell 110 includes a bottom plate 111 for sealing the opening to enclose the desorption cavity with the lower shell 120.

[0066] Specifically, this example can utilize the structures of the lower shell 120 and the upper shell 110 to form a desorption chamber. For example, the lower shell 120 is constructed with a receiving groove 121 with an opening facing upward, and the bottom of the upper shell 110 has a bottom plate 111 that is adapted to the opening. The bottom plate 111 can be combined with the lower shell 120 to form a desorption chamber, that is, the space of the desorption chamber is the space of the receiving groove 121.

[0067] When the filter assembly 300 needs to be replaced, the upper shell 110 and the lower shell 120 can be disassembled, and the failed filter assembly 300 in the upper shell 110 can be removed, replaced with the restored filter assembly 300 in the accommodating groove 121, and the upper shell 110 and the lower shell 120 can be connected, that is, the bottom plate 111 of the upper shell 110 is covered on the lower shell 120. This arrangement can reduce the use of parts and components, reduce the overall size of the air purification equipment, and reduce costs, making the structure simpler.

[0068] In order to enhance the sealing of the desorption chamber formed by the upper shell 110 and the lower shell 120, in some embodiments, a sealing ring is provided at the lower edge of the base plate 111 and / or the top edge of the lower shell 120, and the sealing ring is used to improve the airtightness of the desorption chamber formed by the upper shell 110 and the lower shell 120.

[0069] Specifically, the sealing ring can be set on the lower edge of the bottom plate 111, or on the top edge of the lower shell 120. Of course, it can also be set on both the bottom plate 111 and the lower shell 120. There is no limitation here. The setting of the sealing ring can greatly improve the airtightness of the desorption cavity formed after the upper shell 110 and the lower shell 120 are assembled.

[0070] In some embodiments, the filter component 300 includes an activated carbon filter element; the air purification device also includes a replacement reminder component (not shown), which is arranged at the body 100 and is used to remind the replacement of the activated carbon filter element located in the air duct 103 and the activated carbon filter element in the desorption chamber.

[0071] Specifically, the filter component 300 in this example uses an activated carbon filter element. The activated carbon uses its highly developed pore structure to provide a large surface area, which can fully contact with impurities in the gas, so that a large number of molecules on the activated carbon pore walls can generate strong gravitational force, thereby attracting harmful impurities into the pores, thereby effectively adsorbing harmful gas molecules in the air such as formaldehyde, benzene, toluene, etc.

[0072] In addition, in order to facilitate the user to replace the activated carbon filter element in the air duct 103 in time, a replacement reminder component can be set in the body 100 to remind the user to replace the activated carbon filter element at the air duct 103 and the activated carbon filter element in the desorption chamber. The replacement reminder component in this example may include a reminder light, which is set outside the body 100, and the user is reminded by the change of color, for example, green is a normal working state, and red is a state indicating that the activated carbon filter element at the air duct 103 is invalid and needs to be replaced. The change of the reminder light needs to be controlled by other modules inside the replacement reminder component. For example, the replacement reminder component may include a simple timing module, which changes the color of the reminder light after the time is reached (for example, a week or a month as a cycle) to remind the user to replace the activated carbon filter element; the replacement reminder component may also include a radio frequency identification module, which can be set on the side of the activated carbon filter element at the air duct 103 or at the desorption chamber. When the user replaces the activated carbon filter element, the radio frequency identification module will be triggered. Combined with the timing module, it can realize a more accurate timing of the use time of the activated carbon filter element, so as to more accurately remind the user to replace the activated carbon filter element.

[0073] Of course, the timing module can also be combined with a VOC sensor and a temperature and humidity sensor on the body 100 to calculate the life of the activated carbon filter element, and change the color of the reminder light when the life is about to expire or after it expires to remind the user to replace the activated carbon filter element.

[0074] In addition to the above-mentioned method of prompting the replacement of the activated carbon filter element, in some embodiments, the replacement prompt component may include a prompt light, a first VOC sensor, a second VOC sensor and a controller.

[0075] The warning light is arranged outside the body 100; the first VOC sensor is arranged at the outlet of the filter component 300 in the air duct 103, and outputs a first VOC value; the second VOC sensor is located outside the body 100, and outputs a second VOC value; the controller is electrically connected to the first VOC sensor and the second VOC sensor respectively, and receives the first VOC value and the second VOC value to calculate the adsorption efficiency of the filter component 300 in the air duct 103, and controls the warning light to change the warning color when the adsorption efficiency is lower than the threshold value.

[0076] It can be understood that by setting a first VOC sensor at the outlet and rear end of the filter assembly 300, the content of VOC gas in the filtered air can be detected and a first VOC value can be output. A second VOC sensor is set outside the body 100 to detect the content of VOC gas in the external environment and output a second VOC value.

[0077] The controller can calculate the difference between the first VOC value and the second VOC value. The larger the difference, the better the filtering effect of the filter component 300. If the difference becomes smaller and smaller, it means that the filtering effect of the filter component 300 is reduced. If the difference is lower than a preset threshold, it means that the filtering capacity of the filter component 300 is low or has lost its filtering capacity. At this time, the controller controls the color of the replacement prompt light to prompt the user to replace the filter component 300 in time.

[0078] In some embodiments, a fan is provided in the desorption chamber and is located on one side of the desorption attachment 400 so that the ozone generated by the desorption attachment 400 is evenly distributed in the desorption chamber.

[0079] It is understandable that the setting of the fan is conducive to blowing the ozone generated by the ozone generator to various positions of the desorption chamber, so that the ozone is evenly distributed in the desorption chamber, thereby achieving sufficient analysis and treatment of harmful substances on the filter component 300 by ozone.

[0080] In some embodiments, the desorption chamber is further provided with a clamping piece to fix the filter assembly 300 located in the desorption chamber; an ultraviolet lamp is also provided in the desorption chamber, and the ultraviolet lamp is provided on one side of the filter assembly 300 .

[0081] Specifically, the clamping parts can be multiple clamps arranged in the desorption chamber, and the multiple clamps can clamp and fix the filter component 300 placed in the desorption chamber to prevent the air purification device from vibrating during operation and causing the filter component 300 to move in the desorption chamber, thereby causing incomplete analysis of the filter component 300.

[0082] The ultraviolet lamp can be an ultraviolet LED lamp, which can not only accelerate the decomposition of ozone, but also play a role in sterilization. The ultraviolet LED lamp can be arranged on one side of the largest surface of the filter assembly 300 to achieve the maximum sterilization effect on the filter assembly 300.

[0083] like Figure 1 As shown, in some embodiments, the air purification device also includes a metal mesh cover 500, which is arranged outside the upper shell 110 to filter the airflow entering the air duct 103; a filter is arranged at the air inlet 101 to filter the airflow after being filtered by the metal mesh cover 500.

[0084] Specifically, the metal mesh cover 500 and the filter screen can perform preliminary filtering on the external airflow. The specific structure can be understood by referring to the relevant technology. The preliminary filtered airflow can be effectively purified by re-filtering the filter assembly 300. Through multiple filtering of the metal mesh cover 500, the filter screen and the filter assembly 300, effective filtering of the external air is finally achieved.

[0085] Finally, it should be noted that the above implementation modes are only used to illustrate the present application, rather than to limit the present application. Although the present application is described in detail with reference to the embodiments, a person skilled in the art should understand that various combinations, modifications or equivalent substitutions of the technical solutions of the present application do not depart from the spirit and scope of the technical solutions of the present application, and should be included in the scope of the claims of the present application.

Claims

1. An air purification device, characterized in that: include: A machine body, having an air inlet and an air outlet, wherein the air inlet and the air outlet form an air duct within the machine body; An induced draft fan is arranged at the air duct; At least two filter assemblies, one of which is disposed at the air duct so as to force the airflow entering from the air inlet to pass through the filter assembly under the action of the induced draft fan; A desorption cavity is formed in the body and is located outside the air duct. A desorption attachment is provided in the desorption cavity. The desorption cavity is configured to accommodate the remaining one or more filter components to be restored so as to analyze the substances adsorbed on the filter components through the desorption attachment.

2. The air purification device according to claim 1, characterized in that: The body comprises an upper shell and a lower shell, and the upper shell and the lower shell are detachably connected; The air inlet, the air outlet and the induced draft fan are arranged on the upper shell, and the desorption cavity is at least partially located in the lower shell.

3. The air purification device according to claim 2, characterized in that: The lower shell is configured with a receiving groove opening toward the upper shell, and the release accessory is located in the receiving groove; The upper shell comprises a bottom plate, and the bottom plate is used to abut against the top edge of the filter assembly, so as to enclose the desorption chamber through the bottom plate, the side wall of the filter assembly and the lower shell.

4. The air purification device according to claim 2, characterized in that: The lower shell is configured with a receiving groove opening toward the upper shell; The upper shell includes a bottom plate for sealing the opening to enclose the desorption cavity together with the lower shell.

5. The air purification device according to claim 4, characterized in that: A sealing ring is provided at the lower edge of the bottom plate and / or the top edge of the lower shell, and the sealing ring is used to improve the air tightness of the desorption cavity formed by buckling the upper shell and the lower shell.

6. The air purification device according to claim 2, characterized in that: The lower shell is configured with a receiving groove opening toward the upper shell; The air purification device comprises a cover plate, which is used to seal the opening so as to enclose the desorption cavity together with the lower shell, and the bottom of the upper shell abuts against the cover plate.

7. The air purification device according to any one of claims 1 to 6, characterized in that: The filter assembly includes an activated carbon filter element; The air purification device also includes a replacement reminder component, which is arranged at the body and is used to remind the replacement of the activated carbon filter element located at the air duct and the activated carbon filter element in the desorption chamber.

8. The air purification device according to claim 7, characterized in that: The replacement prompt component comprises: A warning light is arranged outside the body; A first VOC sensor is disposed at the outlet of the filter assembly in the air duct and outputs a first VOC value; A second VOC sensor is located outside the housing and outputs a second VOC value; The controller is electrically connected to the first VOC sensor and the second VOC sensor respectively, and receives the first VOC value and the second VOC value to calculate the adsorption efficiency of the filter component located in the air duct, and controls the prompt light to change the prompt color when the adsorption efficiency is lower than a threshold value.

9. The air purification device according to any one of claims 1 to 6, characterized in that: The solution accessory is an ozone generator; A fan is provided in the desorption chamber and is located at one side of the desorption attachment so that the ozone generated by the desorption attachment is evenly distributed in the desorption chamber.

10. The air purification device according to claim 9, characterized in that: The desorption chamber is also provided with a clamping piece to fix the filter assembly located in the desorption chamber; An ultraviolet lamp is also arranged in the desorption chamber, and the ultraviolet lamp is arranged on one side of the filter component.

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