Air purifier with filter element detection function

Abstract

The utility model relates to an air purifier with a filter element detection function. The air purifier comprises a main machine and a filter element, the main machine comprises a shell, a draught fan and a detection module, the shell comprises a main shell body and an air outlet cover installed on the main shell body, and the filter element is detachably installed in the main shell body; wherein an inner frame body is arranged in the main shell, a purification cavity for containing the filter element is formed between the top wall of the inner frame body and the bottom wall of the main shell, and the upper end and the lower end of the filter element are in pressure abutting connection with the top wall and the bottom wall respectively to be fixed; the filter element is provided with a detected part, and when the filter element is installed in the main shell, the detected part is detected by the detection module. The air purifier can detect the mounting state of the filter element, and has the advantage that the filter element mounting and fixing structure is simple.

Description

Technical Field

[0001] The present application relates to the field of air purifiers; more specifically, to an air purifier with a filter element detection function. Background Art

[0002] The air purifier can inhale polluted air under the action of the fan, and filter out pollutants such as dust and odor particles in the air through the filter element arranged inside its main body shell, thereby obtaining clean air, which is beneficial to improving the cleanliness of the air.

[0003] In the prior art, the filter element fixing structure installed in the main body housing generally has the problem of being relatively complex. At the same time, the existing air purifiers also have the defect that the filter element is not properly installed in the main body but still works. This not only fails to achieve the expected purification function, but also leads to the shortening of the main body life and waste of energy. Therefore, there is a need to improve the existing air purifiers. Utility Model Content

[0004] In order to at least partially solve the problems of the prior art, the present invention discloses an air purifier with a filter element detection function, which includes a main unit and a filter element. The main unit includes a housing, a fan and a detection module. The housing includes a main shell and an air outlet cover mounted on the main shell. The filter element is detachably mounted in the main shell. The main shell is provided with an inner frame, and a purification cavity for accommodating the filter element is formed between the top wall of the inner frame and the bottom wall of the main shell. The upper and lower ends of the filter element are respectively fixed by pressure contact with the top wall and the bottom wall. The filter element is provided with a detected portion. When the filter element is installed in the main shell, the detected portion can be detected by the detection module.

[0005] According to a specific embodiment of the present invention, the detected part is an RFID chip, and the detection module includes an RFID card reader for identifying / reading information of the RFID chip.

[0006] Optionally, the RFID chip is arranged at the lower end portion of the filter element abutting against the bottom wall.

[0007] According to another specific embodiment of the present invention, the detection module includes a detection circuit, and the detected part is configured to be able to change the circuit state of the detection circuit; wherein the change in the circuit state includes a change in the current, voltage, resistance and / or capacitance of the detection circuit.

[0008] Optionally, the detected portion includes a conductive portion, and when the filter element is installed in the main housing, the conductive portion is connected to the detection circuit to change the circuit state. In other words, the conductive portion is electrically connected to the detection circuit.

[0009] Optionally, the detection circuit includes an upper capacitor plate arranged on the top wall and a lower capacitor plate arranged on the bottom wall. The upper capacitor plate and the lower capacitor plate form a capacitor. When the filter element is installed in the main shell, the capacity of the capacitor changes.

[0010] Furthermore, the air purifier also includes a dust sensor for detecting external air. The dust sensor can detect the pollution level of the ambient air. For example, the dust sensor starts detecting the pollution level when the air purifier is turned on. In automatic mode, the air purifier can automatically adjust the wind speed according to the pollution level, thereby improving its intelligence and user convenience.

[0011] According to a specific embodiment of the present utility model, the filter element has a cylindrical structure, including a filter body with a central axis hole, a lower cover and an upper cover, the lower cover and the upper cover are respectively connected to the two axial ends of the filter body, and the detected part is arranged on the upper cover and / or the lower cover.

[0012] Furthermore, the inner frame has a limiting portion, and the limiting portion abuts against the outer peripheral surface of the filter element to locate the installation position of the filter element.

[0013] Furthermore, the limiting portion is an arc-shaped wall, and the arc-shaped wall is provided with an air-avoiding hole exposing the outer surface of the filter element, so as to increase the contact area between the filter element and the air and give full play to the filtering capacity of the filter element.

[0014] The technical solution of the utility model has the following beneficial effects:

[0015] In this utility model, the upper and lower ends of the filter element are respectively abutted against the top wall of the inner frame and the bottom wall of the main housing with a predetermined pressure, thereby being fixed within the main housing. This has the advantage of a simple filter element installation and fixation structure, which helps to simplify the structure of the air purifier. Furthermore, after the filter element is installed in the main housing, it can be detected by the main unit's detection module to determine whether the filter element is correctly installed, ensuring the correct use of the air purifier.

[0016] In order to more clearly illustrate the purpose, technical solutions and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structural diagram of the air purifier in the embodiment;

[0018] Figure 2 is a first exploded structural diagram of the air purifier in the embodiment;

[0019] Figure 3 is a second exploded structural diagram of the air purifier in the embodiment;

[0020] Figure 4 is a third exploded structural diagram of the air purifier in the embodiment;

[0021] Figure 5 is a cross-sectional structural diagram of an air purifier in an embodiment;

[0022] Figure 6 is a structural diagram of the main housing in the embodiment;

[0023] Figure 7 It is a structural diagram of the inner frame in the embodiment. DETAILED DESCRIPTION

[0024] In the following description, many specific details are explained in combination with the embodiments to facilitate a full understanding of the present invention. However, it should be understood that the following embodiments and detailed descriptions are only for illustrative purposes and do not limit the scope of protection of the present invention.

[0025] like Figures 1 to 7 As shown, the air purifier of the embodiment includes a host 100 and a filter element 20. The host 100 includes a casing, a fan 31 and a detection module (not shown in the figure). The casing includes a main shell 11 and an air outlet cover 12 installed on the main shell 11. The filter element 20 is detachably arranged in the main shell 11.

[0026] For example, the main housing 11 is a rectangular housing. Figure 3 As shown, one side of the main housing 11 is provided with an opening 111a for installing / removing the filter element 20, and a door cover 111b for covering the opening 111a is detachably installed. Figure 1 As shown, the door cover 111b may be provided with an air inlet 111c, through which external air can enter the interior of the main housing 11 under the action of the fan 31. The shape of the air inlet 111c can be circular, strip-shaped, oval, etc., and the present invention is not limited to this. The door cover 111b and the main housing 11 can be connected by a detachable structure such as a snap connection or screw fixation.

[0027] Combine Figure 3 、 Figure 5 and Figure 6 As shown, an inner frame 15 for positioning the filter element 20 is provided within the main housing 11. The inner frame 15 can be independently provided and fixed within the main housing 11, or it can be a part of the main housing 11 (e.g., integrally formed with the inner frame 15). The inner frame 15 is generally U-shaped, with its sidewalls being hollowed out to increase the contact area between the filter element 20 and the air to be purified and to facilitate air flow.

[0028] The open end 150 of the inner frame 15 is aligned with / facing the opening 111a for installing / removing the filter element 20. When installing, the filter element 20 can be pushed into the inner frame 15 through the opening 111a. The top wall 153 of the inner frame 15 and the bottom wall 115 of the main housing 11 are arranged opposite each other in the height direction, forming a purification cavity for accommodating the filter element 20 therebetween. The upper and lower ends of the filter element 20 are respectively in pressure contact with the top wall 153 and the bottom wall 115, thereby securing the filter element 20 and preventing it from shaking.

[0029] In the embodiment, Figure 3 As shown, the filter element 20 has a generally cylindrical structure and comprises a filter body 21 with a central axial hole, a lower cover 22, and an upper cover 23. The filter body 21 is made of a porous material with filtering / adsorption functions. The lower cover 22 and the upper cover 23 are respectively connected to the two axial ends of the filter body 21. When the filter element 20 is installed in the main housing 11, the lower cover 22 and the upper cover 23 respectively abut against the bottom wall 115 of the main housing 11 and the top wall 153 of the inner frame 15 with a predetermined pressure, squeezing and deforming the filter body 21 in the height direction and fixing the position of the filter element 20. Air is purified by passing through the filter element 20 radially from the outside to the inside.

[0030] Furthermore, the inner frame 15 has one or more limiting parts that abut against the outer peripheral surface of the filter element 20 to locate the installation position of the filter element 20. For example, Figure 6 As shown, the stopper can be a curved wall 151 that matches the shape of the filter element 20. The filter element 20 is installed in place when it is pushed into the inner frame 15 and abuts the curved wall 151. The curved wall 151 is provided with a hole 152 that exposes the outer surface of the filter element 20, thereby increasing the contact area between the filter element 20 and the air and fully utilizing the filtering capacity of the filter element 20.

[0031] Furthermore, the filter element 20 is provided with a detection portion (not shown in the figure). When the filter element 20 is installed in the main housing 11, the detection portion can be detected by the detection module of the main unit 100 to determine the installation status of the filter element 20. In the present utility model, the air purifier can only start working when the detection module detects that the filter element 20 is correctly installed, ensuring the correct use of the air purifier.

[0032] In some embodiments, the detected component is an RFID chip, and the detection module of the main unit 100 includes an RFID reader for identifying / reading information from the RFID chip. This information can be used to determine whether the filter cartridge 20 is correctly installed. Furthermore, the information can be used to identify relevant information about the filter cartridge 20, such as production information, type parameter information, usage information, and / or anti-counterfeiting information. The RFID chip can be positioned at the lower end of the filter cartridge 20 where it abuts the bottom wall 115, preferably recessed inwardly to prevent wear and tear from contact with the bottom wall 115 during installation. Exemplarily, the RFID chip is positioned within a recess in the lower cover 22 and secured to the lower cover 22 via adhesive. Alternatively, the RFID chip can be positioned on the upper cover 23 or other suitable location. The RFID reader can be positioned to identify / read information from the RFID chip, and is preferably positioned in a location corresponding to the RFID chip, such as recessed inwardly in the bottom wall 115.

[0033] In some embodiments, the detection module includes a detection circuit, and the detected part is configured to be able to change the circuit state of the detection circuit; wherein the change in the circuit state includes a change in the current, voltage, resistance and / or capacitance of the detection circuit.

[0034] Exemplarily, the detected portion includes a conductive portion, which can be a conductive member (e.g., a conductive sheet) provided on the upper cover 23 and / or the lower cover 22. When the filter element 20 is installed in the main housing 11, the conductive portion is connected to the detection circuit and changes the circuit state. At this time, the conductive portion is electrically connected to the detection circuit (e.g., two positive and negative contacts that were originally disconnected on the conductive detection circuit), causing the current, voltage, and / or resistance in the detection circuit to change and generate a corresponding electrical signal. The processor of the detection module can determine whether the filter element 20 is correctly installed based on the electrical signal, and can also identify relevant information of the filter element 20 accordingly.

[0035] Exemplarily, the detection circuit includes an upper capacitor plate arranged on the top wall 153 and a lower capacitor plate arranged on the bottom wall 115. The upper capacitor plate and the lower capacitor plate constitute a capacitor. When the filter element 20 is installed in the main shell 11, the interface dielectric between the upper capacitor plate and the lower capacitor plate changes from air to the filter element 20, and the capacity of the capacitor changes accordingly. The processor of the detection module can determine whether the filter element 20 is correctly installed based on the capacitance change signal, and can also identify relevant information of the filter element 20 based on this.

[0036] Furthermore, the air purifier may further include a dust sensor 16. The dust sensor 16 can detect the pollution level of the ambient air. For example, the dust sensor starts detecting the pollution level when the air purifier is turned on. The air purifier can automatically adjust the wind speed according to the pollution level when in automatic mode.

[0037] Exemplarily, the dust sensor 16 is provided on the main shell 11 and located above the opening 111a. A grid-shaped sensor cover 111d is provided on the door cover 111b at a position corresponding to the dust sensor 16. External air can contact the dust sensor 16 through the sensor cover 111d.

[0038] Furthermore, at least one side of the main housing 11 is provided with an air inlet 112a and a side cover 113 is installed to cover the air inlet 112a. The area of ​​the air inlet 112a is larger than the air inlet hole 111c. For example, Figure 4 As shown, the other three sides of the main housing 11 are each provided with an air inlet side wall 112 and a side cover 113 mounted on the air inlet side wall 112. The air inlet side wall 112 is provided with an air inlet 112a. The side cover 113 is disposed outside of and covers the air inlet 112a. An air inlet gap 114 communicating with the air inlet 112a is formed between at least a portion of the edge of the side cover 113 and the air inlet side wall 112. The side cover 113 and the air inlet side wall 112 can be secured to each other using a snap-fit ​​connection structure, but this is not limited thereto. For example, other securing methods such as screws may also be used.

[0039] During operation, external air, driven by the fan 31, sequentially enters the main housing 11 through the relatively large air inlet gap 114 and the air inlet 112a. This air inlet structure prevents contaminants from clogging it, thereby improving air intake efficiency. Preferably, the side cover 113 is spaced from the air inlet sidewall 112, and the air inlet gap 114 is formed along the entire edge of the side cover 113 to further improve air intake efficiency.

[0040] A fan assembly 30 is provided above the inner frame 15. The fan assembly 30 includes a fan 31 and a fan box 32. The fan box 32 has a hollow air collecting cover 321 connected to the purification chamber. At least a portion of the fan 31 is installed in the air collecting cover 321 (see FIG. Figure 5 ) to improve air suction efficiency. Exemplarily, the fan box 32 is fixed to the top of the main housing 11 and at least partially embedded within the main housing 11. A mounting bracket 33 is provided on the top of the fan box 32, exposing the upper end opening of the air collecting hood 321. The fan 31 is supported on the mounting bracket 33. The fan 31 can be a centrifugal fan, including blades 311 and a motor 312. The blades 311 are mounted within the air collecting hood 321, and the motor 312 is located above the blades 311. The fan 31 can also be an axial flow fan.

[0041] An air flow hole 154 is provided on the top wall 153 of the inner frame 15, and the air flow hole 154 is directly opposite the central axis hole of the filter element 20. The lower end opening of the air collecting hood 321 is contracted radially inward and connected to the air flow hole 154 on the top wall 153 of the inner frame 15. Under the suction action of the fan 31, external air enters the purification chamber and is purified by the filter element 20. The purified air enters the air collecting hood 321 through the central axis hole of the filter element 20, then enters the air outlet hood 12 from the air collecting hood 321, and is discharged from the air outlet hood 12 to the surrounding environment.

[0042] The air outlet cover 12 is connected to the fan box 32 or the main housing 11 and is mounted on the fan assembly 30. Exemplarily, the air outlet cover 12 includes side walls 121 connected to the main housing 11 and a top wall 122 disposed on top of the side walls 121. Air outlet structures are provided on the side walls 121 and / or the top wall 122. The side walls 121 and the top wall 122 can be separate structures or integrally formed.

[0043] In the embodiment, the top wall 122 is provided with an air outlet grille 123 (see Figure 1 ) and the motor cover 124 (see Figure 5 ), the grid plates in the air outlet grille 123 can be arranged vertically so that the air outlet direction is vertically upward. In addition, densely distributed air outlet holes 1211 can be provided on at least one side wall 121 of the air outlet cover 12 to achieve both vertical and lateral air outlet.

[0044] An operation / display panel 125 may be provided on the air outlet cover 12. The operation / display panel 125 may be arranged on the top wall 122 and located next to the air outlet grille 123, or may be arranged on the side wall 121, or may be partially arranged on the top wall 122 and partially arranged on the side wall 121.

[0045] Although the present invention has been described above through embodiments, it should be understood that the above embodiments are only used to exemplarily describe the feasible implementation plans of the present invention and should not be interpreted as limiting the scope of protection of the present invention. That is, any replacement or change made by those skilled in the art in accordance with the present invention should also be covered by the scope of protection of the claims of the present invention.

Claims

1. An air purifier with a filter element detection function, comprising a main unit and a filter element, wherein the main unit comprises a housing, a fan, and a detection module, the housing comprises a main housing and an air outlet cover mounted on the main housing, and the filter element is detachably mounted within the main housing; characterized in that: An inner frame is provided in the main housing, and a purification cavity for accommodating the filter element is formed between the top wall of the inner frame and the bottom wall of the main housing. The upper and lower ends of the filter element are respectively pressed against the top wall and the bottom wall to be fixed; The filter element is provided with a detected portion, and when the filter element is installed in the main housing, the detected portion can be detected by the detection module.

2. The air purifier with filter element detection function according to claim 1, characterized in that: The detected part is an RFID chip, and the detection module includes an RFID card reader for identifying / reading information of the RFID chip.

3. The air purifier with filter element detection function according to claim 2, characterized in that: The RFID chip is arranged at the lower end portion of the filter element abutting against the bottom wall.

4. The air purifier with filter element detection function according to claim 1, characterized in that: The detection module includes a detection circuit, and the detected part is configured to be able to change the circuit state of the detection circuit; wherein the change in the circuit state includes a change in the current, voltage, resistance and / or capacitance of the detection circuit.

5. The air purifier with filter element detection function according to claim 4, characterized in that: The detected portion includes a conductive portion. When the filter element is installed in the main housing, the conductive portion is connected to the detection circuit to change the circuit state.

6. The air purifier with filter element detection function according to claim 4, characterized in that: The detection circuit includes an upper capacitor plate arranged on the top wall and a lower capacitor plate arranged on the bottom wall. The upper capacitor plate and the lower capacitor plate form a capacitor. When the filter element is installed in the main shell, the capacity of the capacitor changes.

7. The air purifier with filter element detection function according to claim 1, characterized in that: The air purifier further includes a dust sensor for detecting external air.

8. The air purifier with filter element detection function according to claim 1, characterized in that: The filter element has a cylindrical structure, including a filter body with a central axis hole, a lower cover and an upper cover, the lower cover and the upper cover are respectively connected to the two axial ends of the filter body, and the detected part is arranged on the upper cover and / or the lower cover.

9. The air purifier with filter element detection function according to claim 8, characterized in that: The inner frame has a limiting portion, and the limiting portion abuts against the outer peripheral surface of the filter element to locate the installation position of the filter element.

10. The air purifier with filter element detection function according to claim 9, characterized in that: The limiting portion is an arc-shaped wall, and a clearance hole exposing the outer peripheral surface of the filter element is provided on the arc-shaped wall.

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