air purification device

Abstract

This invention discloses an air purification device, including a housing, a first fan, a purification component, and a valve assembly. The housing has an interconnected indoor return air inlet and an air outlet, forming an indoor circulating air duct between them. The first fan is located within the indoor circulating air duct. The purification component is located within the indoor circulating air duct. The valve assembly is movably mounted on the housing and can seal and open the indoor return air inlet. The technical solution of this invention, by using the valve assembly to seal and open the indoor return air inlet, prevents dust or debris from entering the housing and excessively contaminating the purification component inside when the valve assembly seals the indoor return air inlet. Furthermore, it keeps the inner cavity of the housing relatively sealed. Therefore, when the valve assembly switches to opening the indoor return air inlet, the first fan activates, increasing the air pressure difference between the indoor environment and the housing, thereby increasing the airflow rate and improving purification efficiency.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and in particular to an air purification device. Background Technology

[0002] To purify indoor air, some air purifiers have an indoor recirculation mode. This involves drawing indoor air into the purifier, purifying it there, and then blowing out clean air. However, traditional air purifiers have open indoor return air vents or louvered structures, resulting in a small pressure difference between the purifier's interior and the room. This leads to slower air turbulence and lower air purification efficiency. Summary of the Invention

[0003] The main objective of this invention is to provide an air purification device that aims to improve air purification efficiency.

[0004] To achieve the above objectives, the present invention proposes an air purification device comprising a housing, a first fan, a purification component, and a valve assembly. The housing has an interconnected indoor return air inlet and an air outlet, forming an indoor circulating air duct between the indoor return air inlet and the air outlet. The first fan is disposed within the indoor circulating air duct. The purification component is disposed within the indoor circulating air duct. The valve assembly is movably disposed within the housing and is capable of sealing and opening the indoor return air inlet.

[0005] Optionally, the valve assembly includes a valve body movably disposed within the housing; and

[0006] A sealing ring is fitted around the outer edge of the valve body and sandwiched between the valve body and the inner wall of the indoor return air vent to seal the indoor return air vent.

[0007] Optionally, the valve assembly further includes an elastic element, one end of which is connected to the valve body and the other end of which is connected to the housing.

[0008] Optionally, the inner wall of the indoor return air vent is provided with an installation cylinder, the elastic element includes a spring body and a fixing cover, the fixing cover blocks the port of the installation cylinder away from the valve body, one end of the spring body extends into the installation cylinder and is fixedly connected to the fixing cover, and the other end is connected to the valve body; and / or, the valve body is provided with a support column protruding on the side facing the indoor circulating air duct, and one end of the elastic element is sleeved on the support column.

[0009] Optionally, the air purification device further includes a deflector, which is installed in the housing and located in the indoor circulating air duct. The deflector has a vent that connects the indoor return air vent and the air inlet side of the first fan, and the vent gradually increases in size along the air inlet direction.

[0010] Optionally, one end of the air guide shroud is provided with a sealing part, and the inner wall of the indoor return air vent is provided with a mounting part, the sealing part abutting against the mounting part.

[0011] Optionally, the sealing part includes a first connecting ring and a second connecting ring that are parallel to each other. The second connecting ring protrudes from the inner wall of the first connecting ring. The end face of the first connecting ring is offset from the end face of the second connecting ring, and both the first connecting ring and the second connecting ring abut against the mounting part.

[0012] Optionally, the air deflector is screwed to the housing.

[0013] Optionally, the first fan includes:

[0014] Electric motor; and

[0015] The wind turbine is connected to the motor via a drive, and the end face of the wind turbine facing away from the motor has a tapered end face.

[0016] Optionally, the indoor return air vent is further provided with a matching cover, which is connected to the housing and covers the end face of the impeller away from the motor.

[0017] Optionally, the mating cover is further provided with a driving device, which is connected to the valve assembly in a transmission manner, and drives the valve assembly to seal the indoor return air vent or open the indoor return air vent.

[0018] Optionally, the air purification device further includes a duct, which is connected to the air outlet side of the air guide shroud, and the first fan is installed inside the duct.

[0019] And / or, the air purification device further includes a second fan, which is disposed between the purification component and the air outlet.

[0020] Optionally, the purification component includes a first purification module, which includes a filter and a manganese mesh support, wherein the filter and the manganese mesh support are stacked in the air inlet direction.

[0021] Optionally, the purification component further includes a humidification module, which is located on the air outlet side of the manganese mesh support;

[0022] And / or, the purification component further includes a heating module located on the air outlet side of the manganese mesh support.

[0023] Optionally, the housing is further provided with a communication hole that communicates with the outside, and an exhaust duct that communicates with the communication hole is formed inside the housing. A switching valve is also provided between the exhaust duct and the air outlet to select whether to open the air outlet or the exhaust duct.

[0024] And / or, a fresh air duct is also formed inside the housing, the fresh air duct being connected to the air inlet side of the purification component.

[0025] Optionally, the air purification device is a vertically mounted air purification device or a horizontally mounted air purification device.

[0026] The technical solution of this invention employs a valve assembly movably mounted on the housing, capable of sealing and opening the indoor return air vent. On one hand, when the valve assembly seals the indoor return air vent, it prevents dust or debris from entering the housing and excessively contaminating the purification components inside. On the other hand, when the valve assembly opens the indoor return air vent, under the action of the first fan, indoor air is drawn into the indoor circulation duct through the vent and purified by the purification components located within the duct, thus achieving the effect of purifying the indoor air. Furthermore, by sealing the indoor return air vent with the valve assembly, the inner cavity of the housing is kept in a relatively sealed state. Therefore, when the valve assembly switches to opening the indoor return air vent, the activation of the first fan increases the air pressure difference between the indoor area and the housing, thereby increasing the air turbulence rate and improving purification efficiency. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0028] Figure 1 This is a three-dimensional structural diagram of an embodiment of the air purification device of the present invention when it is a vertically mounted structure;

[0029] Figure 2 This is a top view of the air purification device of the present invention when it is a vertically mounted structure;

[0030] Figure 3 for Figure 2 Sectional view of AA;

[0031] Figure 4 for Figure 3A magnified view of a section at point C;

[0032] Figure 5 for Figure 2 A cross-sectional view of the air purifier BB in exhaust mode;

[0033] Figure 6 for Figure 2 A cross-sectional view of the air purifier BB in fresh air mode;

[0034] Figure 7 This is a partial structural diagram of the housing in the air purification device of the present invention;

[0035] Figure 8 This is a partial structural schematic diagram of the air guide ring in the air purification device of the present invention;

[0036] Figure 9 This is a schematic diagram of a horizontally mounted air purification device according to an embodiment of the present invention.

[0037] Figure 10 This is a schematic diagram of another embodiment of the air purification device of the present invention when it is horizontally mounted;

[0038] Figure 11 This is a schematic diagram of another embodiment of the air purification device of the present invention when it is horizontally mounted.

[0039] Figure 12 This is a partial exploded structural diagram of an embodiment of the air purification device of the present invention when it is a vertically mounted structure.

[0040] Explanation of icon numbers:

[0041]

[0042]

[0043] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0045] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0046] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0047] This invention proposes an air purification device.

[0048] In the embodiments of the present invention, please refer to the reference. Figures 1 to 3 as well as Figure 7 The air purification device includes a housing 100, a first fan 200, a purification component 300, and a valve assembly 400. The housing 100 has an indoor return air inlet 110 and an air outlet 120 that are interconnected, forming an indoor circulation duct between the indoor return air inlet 110 and the air outlet 120. The first fan 200 is located in the indoor circulation duct. The purification component 300 is located in the indoor circulation duct. The valve assembly 400 is movably located in the housing 100 and can seal and open the indoor return air inlet 110.

[0049] By providing an indoor return air inlet 110 and an air outlet 120 on the housing 100, an indoor circulation duct is formed between the indoor return air inlet 110 and the air outlet 120. The first fan 200 and the purification component 300 are both located in the indoor circulation duct. The first fan 200 can be located on the side of the purification component 300 close to the indoor return air inlet 110, or the first fan 200 can be located on the side of the purification component 300 away from the indoor return air inlet 110. Thus, after the first fan 200 is turned on, indoor air can be drawn into the indoor circulation duct through the indoor return air inlet 110, and after being purified by the purification component 300 in the indoor circulation duct, it is blown out from the air outlet 120, thereby achieving the effect of purifying indoor air.

[0050] Furthermore, the air purification device in the present invention also includes a valve assembly 400. By movably mounting the valve assembly 400 within the housing 100 and enabling it to both seal and open the indoor return air vent 110, when indoor air circulation and purification are not required, the valve assembly 400 can be set to seal the indoor return air vent 110, thereby preventing dust or debris from entering the housing 100 through the indoor return air vent 110. When indoor air purification is required, the valve assembly 400 can be driven to open the return air vent, facilitating the entry of indoor air into the indoor circulation duct of the housing 100 for purification. It is understandable that since the valve assembly 400 can seal the indoor return air vent 110, it can ensure that the inner cavity of the housing 100 is in a relatively sealed state. Therefore, when the valve assembly 400 switches from sealing the indoor return air vent 110 to opening the indoor return air vent 110, it can increase the pressure difference between the indoor space and the sealed cavity inside the housing 100, thereby making it easier to break the dynamic balance of indoor air and thus facilitate the entry of indoor air into the indoor circulation duct for purification.

[0051] The technical solution of this invention employs a valve assembly 400 movably mounted on the housing 100, capable of sealing and opening the indoor return air vent 110. On one hand, when the valve assembly 400 seals the indoor return air vent 110, it prevents dust or debris from entering the housing 100 and excessively contaminating the purification component 300 within the housing 100. On the other hand, when the valve assembly 400 opens the indoor return air vent 110, under the action of the first fan 200, indoor air is drawn into the indoor circulation duct through the indoor return air vent 110 and purified by the purification component 300 located within the indoor circulation duct, thereby achieving the effect of purifying the indoor air. Furthermore, by sealing the indoor return air vent 110 with the valve assembly 400, the inner cavity of the housing 100 is in a relatively sealed state. Therefore, when the valve assembly 400 switches to opening the indoor return air vent 110, the activation of the first fan 200 increases the air pressure difference between the indoor space and the housing 100, thereby increasing the air turbulence rate and improving purification efficiency.

[0052] Furthermore, please refer to the following: Figures 1 to 4 as well as Figure 7 The valve assembly 400 includes a valve body 410 and a sealing ring 420. The valve body 410 is movably disposed on the housing 100. The sealing ring 420 is sleeved on the outer edge of the valve body 410 and sandwiched between the valve body 410 and the inner wall of the indoor return air vent 110 to seal the indoor return air vent 110.

[0053] Specifically, the sealing ring 420 can be connected to the valve body 410 by means of embossing, bonding, snap-fit ​​connection, or screw connection. The sealing ring 420 can be made of flexible material, such as silicone or rubber. When the sealing ring 420 is made of flexible material, it can abut against the inner wall of the indoor return air vent 110. The mutual compression between the inner wall of the indoor return air vent 110 and the sealing ring 420 makes it difficult for a channel to form between them, achieving the effect of sealing the indoor return air vent 110. Simultaneously, it ensures that the inner cavity of the housing 100 is in a relatively sealed state. Therefore, when the valve assembly 400 opens the indoor return air vent 110, the pressure difference between the indoor cavity and the inner cavity of the housing 100 is larger, thereby increasing the rate of air turbulence and improving air purification efficiency.

[0054] Furthermore, such as Figure 4 As shown, the valve assembly 400 also includes an elastic element 430, one end of which is connected to the valve body 410 and the other end is connected to the housing 100.

[0055] Understandably, when the valve body 410 switches from a sealed indoor return air vent 110 to an open indoor return air vent 110, the valve body 410 gradually moves away from the housing 100; conversely, when the valve body 410 switches from an open indoor return air vent 110 to a sealed indoor return air vent 110, the valve body 410 gradually moves closer to the housing 100. In this embodiment, by connecting one end of the elastic element 430 to the valve body 410 and the other end to the housing 100, the valve body 410 can automatically retract from the open indoor return air vent 110 state to the sealed indoor return air vent 110 state under the action of the elastic element 430, while also ensuring that the valve body 410 moves away from the housing 100 and remains connected to the housing 100 without falling off.

[0056] Of course, in order to achieve the effect of the valve body 410 being movably connected to the housing 100, in other embodiments, the elastic element 430 can also be replaced by a telescopic rod.

[0057] Furthermore, in order to enable the valve assembly 400 to switch between two states—sealed indoor return air vent 110 and open indoor return air vent 110—the present invention can also provide a drive mechanism, wherein the valve body 410 of the valve assembly 400 can be tractively connected to the drive mechanism. This drive mechanism can be a linkage mechanism, a rack and pinion mechanism, or a linear motor 210, etc., as long as it can ensure that the drive mechanism can drive the valve body 410 to move away from the housing 100 to open the indoor return air vent 110, and can also drive the valve body 410 to move closer to the housing 100 to close the indoor return air vent 110.

[0058] Furthermore, such as Figure 4As shown, in this embodiment, the inner wall of the indoor return air vent 110 is provided with an installation cylinder 800. The elastic element 430 includes a spring body 431 and a fixing cover 432. The fixing cover 432 blocks the port of the installation cylinder 800 away from the valve body 410. The spring body 431 is connected to the valve body 410, and the other end extends into the installation cylinder 800 and is fixedly connected to the fixing cover 432.

[0059] By providing a mounting sleeve 800 protruding from the inner wall of the indoor return air vent, connecting one end of the spring body 431 to the valve body 410, and extending the other end into the mounting sleeve 800, the mounting sleeve 800 provides good guidance for the spring body 431 during the stretching process. Additionally, the mounting sleeve 800 also provides good support and protection for the spring body 431. Furthermore, by sealing the port of the mounting sleeve 800 away from the valve body 410 with a fixing cap 432, and fixing the other end of the spring body 431 to the fixing cap 432, the fixing cap 432 prevents the end of the spring body 431 away from the valve body 410 from protruding outside the mounting sleeve 800, thus preventing the spring body from achieving a stable stretching effect. Specifically, the fixing cap 432 can be interference-fitted with the port of the mounting sleeve 800, or the fixing cap 432 can be fixed to the mounting sleeve 800 by welding or snap-fit ​​connection, preventing the fixing cap 432 from detaching from the mounting sleeve 800.

[0060] In addition, in order to ensure a more stable connection between the elastic element 430 and the valve body 410 in the technical solution of the present invention, in this embodiment, a support column 411 may be provided on the side of the valve body 410 facing the indoor circulation air duct, and one end of the elastic element 430 is sleeved on the support column 411.

[0061] By fitting one end of the elastic element 430 onto the support post 411, the support post 411 provides better support for the elastic element 430; simultaneously, fitting the elastic element 430 onto the support post 411 prevents the elastic element 430 from easily detaching from the support post 411. Specifically, when the elastic element 430 includes the aforementioned spring body 431 and fixing cover 432, one end of the spring body 431 is connected to the fixing cover 432, and the other end of the spring body 431 can be fitted onto the support post 411.

[0062] Furthermore, please refer to the following: Figure 3 , Figure 4 and Figure 8 The air purification device also includes a deflector 500, which is installed on the housing 100 and located in the indoor circulating air duct. The deflector 500 has a vent 510, which connects the indoor return air vent 110 and the air inlet side of the first fan 200, and the vent 510 gradually increases in size along the air inlet direction.

[0063] By creating a guide port on the air deflector 500 that connects the indoor return air inlet 110 and the air inlet side of the first fan 200, indoor air can enter the indoor circulation duct through the indoor return air inlet 110 and the guide port under the action of the first fan 200. Furthermore, by gradually increasing the size of the guide port along the air inlet direction, the diameter of the guide port facing outward from the housing 100 is smaller, thereby achieving an air gathering effect at this point, which can increase the air volume and air velocity entering the indoor circulation duct, thereby improving the indoor air purification rate.

[0064] It is understandable that when the fairing 500 is connected to the housing 100, a gap may appear at the connection point, potentially leading to air leakage. To address this technical issue, please refer to the following reference... Figure 3 , Figure 4 and Figure 8 In this embodiment, a sealing part 520 protrudes from one end of the air guide shroud 500, and an installation part 101 protrudes from the inner wall of the indoor return air vent 110. The sealing part 520 abuts against the installation part 101.

[0065] By providing a sealing part 520 at one end of the air guide shroud 500, and having the sealing part 520 abut against the mounting part 101 protruding on the housing 100, the gaps that occur when the sealing part 520 and the mounting part 101 are connected can be reduced, thereby ensuring that the indoor circulating air duct is also in a relatively sealed state. In the indoor circulation mode, when the valve assembly 400 is opened, a large air pressure difference can be ensured between the indoor and indoor circulating air ducts, thereby improving the indoor air purification efficiency.

[0066] Specifically, please refer to the following: Figure 3 , Figure 4 and Figure 8 The sealing part 520 includes a first connecting ring 521 and a second connecting ring 522 that are parallel to each other. The second connecting ring 522 protrudes from the inner wall of the first connecting ring 521. The end face of the first connecting ring 521 and the end face of the second connecting ring 522 are offset from each other, and both the first connecting ring 521 and the second connecting ring 522 abut against the mounting part 101.

[0067] By misaligning the end face of the first connecting ring 521 (i.e., the surface of the first connecting ring 521 facing the mounting portion 101) with the end face of the second connecting ring 522 (i.e., the surface of the second connecting ring 522 facing the mounting portion 101), the axial lengths of the first connecting ring 521 and the second connecting ring 522 are different. Therefore, when both the first connecting ring 521 and the second connecting ring 522 abut against the mounting portion 101, the mounting portion 101 has at least two mutually misaligned abutment surfaces for the first connecting ring 521 and the second connecting ring 522 to abut against. When both the first connecting ring 521 and the second connecting ring 522 abut against the two mutually misaligned abutment surfaces of the mounting portion 101, a double-seal structure is formed when the sealing portion 520 is connected to the mounting portion 101, thereby improving the sealing effect between the guide shield 500 and the housing 100.

[0068] Furthermore, please refer to the following: Figure 3 , Figure 4 and Figure 8 The flow guide 500 is connected to the housing 100 by screws.

[0069] By connecting the flow guide 500 to the housing 100 with screws, the flow guide 500 and the housing 100 are further secured together, thereby preventing the first connecting ring 521 and the second connecting ring 522 from detaching from the mounting part 101, and further ensuring that the flow guide 500 and the housing 100 have a stable connection effect and a stable sealing effect.

[0070] Specifically, the housing 100 may be provided with a screw post 102 extending in the direction of air intake. The air guide 500 is provided with a corresponding screw hole 530. The screw is locked to the screw post 102 through the screw hole 530, thereby achieving the screw connection effect between the air guide 500 and the housing 100.

[0071] Of course, in other embodiments, the housing 100 can also be fixedly connected to the shroud 500 by means of riveting or welding.

[0072] Furthermore, please refer to the following: Figure 3 and Figure 4 In this embodiment, the first fan 200 includes a motor 210 and a fan wheel 220; the fan wheel 220 is connected to the motor 210 in a drive, and the end face of the fan wheel 220 facing away from the motor 210 is a tapered end face.

[0073] By setting the end face of the impeller 220 away from the motor 210 into a conical end face, this conical end face can have a better air guiding effect on the air drawn in from the indoor return air inlet 110, so that the air drawn in from the indoor return air inlet 110 can flow smoothly along the conical end face of the impeller 220 into the air duct 600. In addition, in this embodiment, by drivingly connecting the impeller 220 to the motor 210, the motor 210 can provide power for the rotation of the impeller 220, keeping the impeller 220 able to rotate continuously and stably to draw indoor air into the indoor circulating air duct.

[0074] Furthermore, please refer to the following: Figure 3 and Figure 4 An auxiliary cover 103 is also provided at the indoor return air vent 110. The auxiliary cover 103 is connected to the housing 100 and is installed on the end face of the impeller 220 away from the motor 210.

[0075] By covering the end face of the impeller 220 away from the motor 210 with the cover 103, the cover 103 can provide good protection for the side of the impeller 220 facing the indoor return air vent 110, preventing external objects from entering the housing 100 and damaging the impeller 220. Furthermore, the shape of the cover 103 can be adapted to the shape of the end face of the impeller 220 away from the motor 210, that is, the cover 103 can be conical, thus also having a good air guiding effect on the air drawn in from the indoor return air vent 110, so that the air drawn in from the indoor return air vent 110 can flow smoothly along its surface into the indoor circulation duct, avoiding the formation of vortices in local areas.

[0076] like Figure 12 As shown, based on the scheme of providing a matching cover 103 at the indoor return air vent 110, the driving device in this invention can be provided on the matching cover 103, and the driving device is connected to the valve assembly 400 for transmission, and drives the valve assembly 400 to seal the indoor return air vent 110 or open the indoor return air vent 110.

[0077] By placing the drive unit on the mating cover 103, it is prevented from blocking the guide cover 500 or the air duct 600 where the first fan 200 is installed. Specifically, the drive unit can be placed on the side of the mating cover 103 facing the valve assembly 400, or on the side of the mating cover 103 away from the valve assembly 400. It is understood that when the drive unit is placed on the side of the mating cover 103 facing the valve assembly 400, it facilitates the transmission connection between the drive unit and the valve assembly 400. When the drive unit is located on the side of the mating cover 103 away from the valve assembly 400, a through hole can be made in the mating cover 103 to allow the drive unit to extend out of the through hole and connect with the valve assembly 400. In addition, by placing the drive unit on the side of the mating cover 103 away from the valve assembly 400, the mating cover 103 can provide better protection for this part, and it also avoids affecting the airflow along the side of the mating cover 103 towards the valve assembly 400, thereby further ensuring the airflow velocity when the air passes through the mating cover 103, and thus improving the purification efficiency.

[0078] Furthermore, the drive device may include a motor, which may be a linear motor with a push rod connected to the valve assembly 400. Specifically, the push rod may be connected to the valve body 410, thereby directly driving the valve assembly 400 to open or close the indoor return air vent 110.

[0079] Alternatively, the drive unit may include a motor and a transmission rod assembly, also known as a linkage assembly. One end of the transmission rod assembly is connected to the motor, and the other end is connected to the valve assembly 400, enabling the valve assembly 400 to move towards and away from the indoor return air vent 110. With this configuration, when the motor starts, it drives the transmission rod assembly, which in turn drives the valve assembly 400 towards the indoor return air vent 110 to seal it; or, when the motor starts, it drives the transmission rod assembly, which in turn drives the valve assembly 400 away from the indoor return air vent 110 to open it.

[0080] Of course, such as Figure 12As shown, the drive device may further include a motor and a gear and rack assembly. The motor may be mounted on the mating cover 103. The gear 910 is connected to the motor for transmission. The rack 920 meshes with the gear 920. The extension direction of the rack 920 is parallel to the extension direction of the central axis of the indoor return air vent 110, and one end of the rack 920 is connected to the valve assembly 400. With this configuration, when the motor starts, it drives the gear 910 to rotate, which in turn drives the rack 920 to move along its extension direction. When the rack 920 moves along its extension direction, it drives the valve assembly 400 to move towards the indoor return air vent 110 to seal the indoor return air vent 110; or, when the rack 920 moves along its extension direction, it drives the valve assembly 400 to move away from the indoor return air vent 110 to open the indoor return air vent 110.

[0081] Furthermore, please refer to the following: Figure 3 and Figure 4 The air purification device also includes a duct 600, which is connected to the air outlet side of the air guide shroud 500, and the first fan 200 is installed inside the duct 600.

[0082] By installing the first fan 200 inside the air duct 600, the air duct 600 can provide better protection for the first fan 200. In addition, the air duct 600 is connected to the air outlet side of the guide shroud 500, so that the air drawn in from the room enters the air duct 600 after passing through the guide shroud 500 and flows along the air duct 600, thereby providing a certain guiding effect on the flow of air.

[0083] Specifically, the air duct 600 is fixedly connected to the air guide cover, which can be achieved through snap-fit ​​connections, screw connections, welding, or other connection methods. For example, when the air duct 600 and the air guide cover are connected by snap-fit ​​connections, the air duct 600 can have snap-fit ​​holes, and the side of the air guide cover facing the air duct 600 can have a corresponding snap-fit ​​part 540. By snapping the snap-fit ​​part 540 into the snap-fit ​​hole, the air guide cover and the air duct 600 are snap-fit ​​connected. It is understandable that when the air guide cover and the air duct 600 are connected by snap-fit ​​connections, they are easy to disassemble and reassemble, thus facilitating the replacement of either the air guide cover or the air duct 600.

[0084] like Figure 3 or Figure 6 As shown, in order to further improve the indoor air purification rate, in this embodiment, the air purification device also includes a second fan 700, which is located between the purification component 300 and the air outlet 120.

[0085] It is understandable that when the first fan 200 is positioned close to the indoor return air vent 110 (i.e., far from the air outlet 120) and on the side of the purification component 300 near the indoor return air vent 110, the indoor air drawn in by the first fan 200, after being purified by the purification component 300, may be difficult to flow to the air outlet 120 solely using the power of the first fan 200. In this embodiment, by providing a second fan 700 positioned between the purification component 300 and the air outlet 120, the second fan 700 can take over the power from the first fan 200, thereby compensating for the insufficient power and allowing the air passing through the purification component 300 to be blown to the air outlet 120 again.

[0086] In addition, it is understandable that the second fan 700 is also located in the indoor circulation duct, so there are at least two fans in the indoor circulation duct. Under the dual action of the first fan 200 and the second fan 700, the exhaust speed can be increased and the air flow rate can be improved, thereby improving the indoor air purification rate and enabling the indoor air to reach the fresh level as soon as possible, thus improving the user experience.

[0087] Furthermore, such as Figure 3 As shown, the purification component 300 includes a filter screen 310 and a manganese mesh support 320, which are stacked in the air inlet direction.

[0088] By incorporating filter 310, larger dust particles and debris can be pre-filtered. Furthermore, filter 310 can be equipped with a sterilizing filter to remove bacteria. By incorporating manganese mesh support 320, formaldehyde in the air passing through it can be removed, ensuring that the air blown out of outlet 120 contains less formaldehyde, thus providing users with healthier and cleaner air.

[0089] Furthermore, such as Figure 3 As shown, the purification component 300 also includes a humidification module 330, which is located on the air outlet side of the manganese mesh support 320.

[0090] Understandably, indoor air is generally quite dry during winter in most regions, especially in northern areas. By installing a humidification module 330, located on the air outlet side of the manganese mesh support 320, the air passing through the filter 310 and the manganese mesh support 320 can be further humidified, resulting in air with suitable humidity being blown out from the air outlet 120, thus preventing an excessively dry indoor environment.

[0091] Specifically, the humidification module 330 may include a water tank, a water trough connected to the water tank, and a wet membrane assembly disposed above the water trough. The water trough is used to supply water to the wet membrane assembly. By placing the wet membrane assembly above the water trough, and using the water trough to supply water to the wet membrane assembly, after the wet membrane assembly is wetted by the water in the water trough, when air passes through the wet membrane assembly, humidified air can be blown out, thereby ensuring that the indoor humidity is maintained within a suitable range. The water trough can be connected to the upper end of the wet membrane assembly via a water pump, thereby introducing water from the water trough into the upper part of the wet membrane assembly under the action of the water pump, and then flowing downwards from the upper part of the wet membrane assembly, expanding the area of ​​the wet membrane assembly that is wetted. Alternatively, the wet membrane assembly has a roller shutter structure, with the lower end of the roller shutter immersed in the water trough. When the roller shutter rolls up, all parts of the wet membrane assembly can be sequentially immersed in the water trough, achieving the effect of wetting all parts of the wet membrane assembly. Additionally, the wet membrane assembly may include a drive unit, a rotating wheel, and a wet membrane body. The drive unit is connected to and drives the rotating wheel to rotate. The wet membrane body is located on the rotating wheel and extends at least partially into the water tank. Thus, during rotation, different parts of the wet membrane body sequentially extend into the water tank and are wetted. When the rotating wheel completes one revolution, it can fully absorb the water in the tank, thereby achieving the effect of wetting the entire circumference of the wet membrane body. Specifically, the drive unit may include a motor 210 and a drive gear connected to the motor 210. The rotating wheel has a driven gear, which meshes with the drive gear. This allows the motor 210 to start and drive the drive gear to rotate, which in turn drives the driven gear and the rotating wheel to rotate, thereby achieving the effect of rotating the wet membrane body.

[0092] To ensure a gentler breeze is blown from the air outlet 120 when using the air purifier in winter, further, such as Figure 5 or Figure 6 As shown, the purification component 300 also includes a heating module 340, which is located between the manganese mesh support 320 and the humidification module 330.

[0093] By setting up the heating module 340, the air drawn in from the indoor return air vent 110 can be heated, thereby ensuring that the air blown out from the air outlet 120 is relatively mild.

[0094] Furthermore, based on the above-mentioned purification component 300 including the humidification module 330, the heating module 340 in this embodiment can be disposed between the manganese mesh support 320 and the humidification module 330. This arrangement ensures that the air is heated to a certain temperature before humidification, thereby guaranteeing that the air blown out from the air outlet 120 remains within both a suitable temperature and humidity range. This avoids the situation where the air humidified by the humidification module 330 is then heated again by the heating module 340 to evaporate some of the moisture.

[0095] Furthermore, please refer to the following: Figure 2 , Figure 3 and Figure 5 The housing 100 is also provided with a communication hole that communicates with the outside. An exhaust duct 104 is formed inside the housing 100 that communicates with the communication hole. A switching valve is also provided between the exhaust duct 104 and the air outlet 120 to select whether to open the air outlet 120 or the exhaust duct 104.

[0096] In exhaust mode, by opening the indoor return air vent 110 through the valve assembly 400, indoor air is drawn in by the first fan 200 and purified by the purification assembly 300. Then, by opening the exhaust duct through the switching valve, the air continues to flow along the exhaust duct 104 and is eventually discharged through the connecting hole. This configuration allows the air purifier to continue drawing indoor air into the exhaust duct using the first fan 200 even in exhaust mode, avoiding the need for an additional fan to draw indoor air into the exhaust duct 104. This reduces the number of parts and the overall size of the air purifier.

[0097] Of course, it is understandable that the switching valve can also be switched to open the air outlet 120 so that the air outlet 120 is connected to the air outlet side of the purification component 300. In this state, if the valve assembly 400, the first fan 200 and the purification component 300 are opened, the air purification device is in the internal circulation purification mode.

[0098] In the technical solution of this invention, please refer to the reference. Figure 2 and Figure 6 Furthermore, a fresh air duct 105 can be formed inside the housing 100, which connects to the air inlet side of the purification component 300. With this configuration, the air purification device in the technical solution of the present invention can also draw in outdoor air, and can also blow the drawn-in outdoor air into the room after purification by the purification component 300, thereby making the indoor air cleaner.

[0099] It is understandable that the fresh air duct 105 needs to introduce outdoor air, so the housing 100 needs to have a fresh air inlet connected to the outside. This fresh air inlet can be the aforementioned connecting port, or it can be two different ports. To simplify the manufacturing process and improve the strength of the housing 100, the fresh air inlet is preferably the aforementioned connecting port. Therefore, to avoid the fresh air duct 105 and the exhaust duct being in a state of simultaneous air circulation, two air ducts can be drawn out from the connection port. One air duct (fresh air duct 105) is directly connected to the air inlet side of the purification module, and the other air duct (exhaust air duct 104) is connected to the air outlet side of the purification module. A valve can also be installed between the fresh air duct 105 and the exhaust air duct 104. The valve can be switched to different positions. When the valve is switched to the first position, the exhaust air duct 104 can be blocked while the fresh air duct 105 is open. When the valve is switched to the second position, the exhaust air duct 104 can be open while the fresh air duct 105 is blocked.

[0100] The air purification device in the technical solution of this invention is a vertically mounted air purification device or a horizontally mounted air purification device.

[0101] Specifically, regardless of whether the air purification device in the technical solution of the present invention is a vertically mounted air purification device or a horizontally mounted air purification device, the housing 100 has a top plate 130, a bottom plate 140, a front panel 150, a back plate 160, a left side plate 170, and a right side plate 180; the bottom plate 140 is arranged opposite to the top plate 130, the front panel 150 is arranged opposite to the back plate 160, and the left side plate 170 is arranged opposite to the right side plate 180. The top plate 130, the bottom plate 140, the front panel 150, the back plate 160, the left side plate 170, and the right side plate 180 together enclose a cavity structure, and the purification module, the first fan 200, etc. are all arranged in this cavity structure.

[0102] Furthermore, the indoor return air vent 110 can be located on the top plate 130, left side plate 170, right side plate 180, or front panel 150 of the housing 100, thereby preventing obstruction of indoor airflow into the housing 100. Correspondingly, the valve assembly 400 can also be connected to the top plate 130, left side plate 170, right side plate 180, or front panel 150 of the housing 100.

[0103] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An air purification device, characterized by, include: The housing has an interconnected indoor return air vent and an air outlet, forming an indoor circulating air duct between the indoor return air vent and the air outlet; The first fan is located inside the indoor circulating air duct; A purification component is disposed within the indoor circulating air duct; and A valve assembly, which is movably disposed in the housing and is capable of sealing the indoor return air vent and opening the indoor return air vent; The valve assembly includes: A valve body, which is movably disposed within the housing; and A sealing ring is fitted around the outer edge of the valve body and sandwiched between the valve body and the inner wall of the indoor return air vent. The inner wall of the indoor return air vent and the sealing ring are in a state of mutual compression to seal the indoor return air vent. The valve assembly also includes an elastic element, one end of which is connected to the valve body and the other end of which is connected to the housing; The inner wall of the indoor return air vent is provided with an installation cylinder. The elastic element includes a spring body and a fixing cover. The fixing cover blocks the port of the installation cylinder away from the valve body. One end of the spring body extends into the installation cylinder and is fixedly connected to the fixing cover, and the other end is connected to the valve body.

2. The air purification device as described in claim 1, characterized in that, The valve body has a support column protruding on the side facing the indoor circulating air duct, and one end of the elastic element is sleeved on the support column.

3. The air purification device as described in claim 1, characterized in that, The air purification device also includes a flow guide hood, which is installed in the housing and located in the indoor circulating air duct. The flow guide hood has a ventilation opening, which connects the indoor return air vent and the air inlet side of the first fan, and the ventilation opening gradually increases in size along the air inlet direction.

4. The air purification device as described in claim 3, characterized in that, One end of the air guide shroud has a sealing part protruding, and the inner wall of the indoor return air vent has a mounting part protruding, with the sealing part abutting against the mounting part.

5. The air purification device as described in claim 4, characterized in that, The sealing part includes a first connecting ring and a second connecting ring that are parallel to each other. The second connecting ring protrudes from the inner wall of the first connecting ring. The end face of the first connecting ring is offset from the end face of the second connecting ring, and both the first connecting ring and the second connecting ring abut against the mounting part.

6. The air purification device as described in claim 3, characterized in that, The flow guide is connected to the housing by screws.

7. The air purification device according to any one of claims 1 to 6, characterized in that, The first fan includes: Electric motor; and The wind turbine is connected to the motor via a drive, and the end face of the wind turbine facing away from the motor has a tapered end face.

8. The air purification device as described in claim 7, characterized in that, The indoor return air vent is also provided with a matching cover, which is connected to the housing and covers the end face of the impeller away from the motor.

9. The air purification device as described in claim 8, characterized in that, The cover is also equipped with a driving device, which is connected to the valve assembly and drives the valve assembly to seal the indoor return air vent or open the indoor return air vent.

10. The air purification device according to any one of claims 3 to 6, characterized in that, The air purification device also includes a duct, which is connected to the air outlet side of the air guide shroud, and the first fan is installed inside the duct. And / or, the air purification device further includes a second fan, which is disposed between the purification component and the air outlet; And / or, the purification component includes a first purification module, the first purification module including a filter screen and a manganese mesh support, the filter screen and the manganese mesh support being stacked in the air inlet direction.

11. The air purification device as described in claim 10, characterized in that, The purification component also includes a humidification module, which is located on the air outlet side of the manganese mesh support. And / or, the purification component further includes a heating module located on the air outlet side of the manganese mesh support.

12. The air purification device according to any one of claims 1 to 6, characterized in that, The housing is also provided with a communication hole that connects to the outside. An exhaust duct is formed inside the housing that connects to the communication hole. A switching valve is provided between the exhaust duct and the air outlet to select whether to open the air outlet or the exhaust duct. And / or, a fresh air duct is also formed inside the housing, and the fresh air duct is connected to the air inlet side of the purification component; And / or, the air purification device is a vertically mounted air purification device or a horizontally mounted air purification device.

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