Formaldehyde purification device and purification method

Abstract

The invention relates to the technical field of formaldehyde purification, and particularly discloses a formaldehyde purification device and a formaldehyde purification method.The formaldehyde purification device comprises a purification barrel, an air inlet, a first air inlet and a second air inlet, the roller is arranged in the purification cylinder, and a plurality of activated carbon filter screens are uniformly arranged on the side wall of the roller; the illumination cavity is formed in the side, away from the air inlet, of the interior of the purification barrel, and a photocatalyst filter screen capable of being attached to the activated carbon filter screen and an ultraviolet lamp for irradiating the photocatalyst filter screen are arranged in the illumination cavity; the driving mechanism is used for driving the roller to rotate, and the exhaust fan is communicated with the interior of the roller, so that the problem that in a traditional formaldehyde purification device, an activated carbon filter screen needs to be replaced regularly, and consequently the formaldehyde purification cost is high is solved.

Description

Technical Field

[0001] This application relates to the technical field of formaldehyde purification, and specifically discloses a formaldehyde purification device and a purification method. Background Art

[0002] Current indoor formaldehyde purification devices mainly rely on ventilation and physical adsorption. Among them, ventilation uses a fan to allow natural circulation of indoor and outdoor air, enabling the exchange of indoor air containing formaldehyde with fresh outdoor air, thereby reducing the indoor formaldehyde concentration. Physical adsorption uses adsorption materials such as activated carbon as a filter to adsorb formaldehyde. The activated carbon filter has a porous structure and a large specific surface area, capable of adsorbing harmful gases such as formaldehyde. When formaldehyde molecules move in the air, they will be captured by the micropores of the activated carbon filter and fixed on the pore surface.

[0003] However, the adsorption capacity of the activated carbon filter is limited and will gradually become saturated over time. It is necessary to regularly replace the activated carbon filter of the formaldehyde purification device, resulting in high formaldehyde purification costs. Moreover, during the replacement process, the human body is easily exposed to formaldehyde, which affects health. Otherwise, the saturated activated carbon filter may release the adsorbed formaldehyde back into the air, causing secondary pollution. Additionally, during the formaldehyde purification process, dust in the air is likely to clog the activated carbon filter, thereby affecting the adsorption effect of the activated carbon filter on formaldehyde. Some formaldehyde purification devices use photocatalyst filters to decompose and remove formaldehyde under light illumination. However, the photocatalyst filter has a poor adsorption effect on formaldehyde and is easily free in the air, resulting in poor formaldehyde purification effect. Therefore, in view of this, the present invention provides a formaldehyde purification device and a purification method to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem in traditional formaldehyde purification devices that the activated carbon filter needs to be replaced regularly, resulting in high formaldehyde purification costs.

[0005] To achieve the above purpose, the basic solution of the present invention provides a formaldehyde purification device, including:

[0006] A purification cylinder, one end of the purification cylinder is provided with an air inlet;

[0007] A drum, arranged inside the purification cylinder, and a plurality of activated carbon filters are evenly arranged on the side wall of the drum;

[0008] A lighting cavity, arranged on the side of the purification cylinder away from the air inlet, and a photocatalyst filter that can be attached to the activated carbon filter and an ultraviolet lamp for irradiating the photocatalyst filter are arranged in the lighting cavity;

[0009] A driving mechanism for driving the drum to rotate and a suction fan communicated with the inside of the drum.

[0010] The principle and effect of this basic solution are as follows:

[0011] Compared with the prior art, the present invention combines the physical adsorption method with the photocatalyst decomposition method, so that the air is first adsorbed by the activated carbon filter screen, and then driven by the driving mechanism, the activated carbon filter screen is brought into contact with the photocatalyst filter screen. With the irradiation of the ultraviolet lamp, formaldehyde is decomposed into harmless carbon dioxide and water. During this process, the adsorption performance and service performance of the activated carbon filter screen basically do not decrease with the service time, thus avoiding the problems of increased cost caused by frequent replacement of the activated carbon filter screen and threats to human health. At the same time, it effectively solves the problem that the photocatalyst filter screen has a poor adsorption effect on formaldehyde, resulting in poor formaldehyde purification effect.

[0012] Furthermore, the drum includes:

[0013] An end cap, provided on the inner wall of one end of the purification cylinder and rotatably connected to the purification cylinder;

[0014] A number of connecting rods, respectively arranged in parallel around the end cap and parallel to the axis of the purification cylinder;

[0015] The activated carbon filter screen is arc-shaped and is respectively arranged between two adjacent connecting rods.

[0016] In this way, it is convenient to install the activated carbon filter screen and use the drum to drive the activated carbon filter screen to rotate.

[0017] Furthermore, the activated carbon filter screen is elastically slidably connected to the connecting rod. A dust removal chamber is provided at the bottom inside the purification cylinder between the air inlet and the lighting chamber. An elastic bump that can squeeze the activated carbon filter screen is provided in the dust removal chamber. Through this setting method, during the process of the drum driving the activated carbon filter screen to rotate, the elastic bump can also be used to squeeze, and the elastic sliding between the activated carbon filter screen and the connecting rod causes the activated carbon filter screen to produce a slight vibration effect, thereby shaking off dust and other impurities adsorbed on the activated carbon filter screen into the dust removal chamber. This can not only prevent the activated carbon filter screen from being blocked and affecting its service performance, but also improve the subsequent purification effect of formaldehyde by the photocatalyst filter screen and the ultraviolet lamp.

[0018] Furthermore, a reflector facing the lighting chamber is provided on the inner wall of a section of the purification cylinder away from the end cap, and a wind baffle is provided directly above the dust removal chamber and fitting the inner wall of the activated carbon filter screen. The reflector can not only prevent the ultraviolet lamp tube from irradiating outside the purification cylinder, but also improve the irradiation effect on the photocatalyst filter screen. The setting of the wind baffle makes the air suction force on the activated carbon blocked by the wind baffle when the activated carbon filter screen passes above the dust removal chamber, preventing the dust and other impurities shaken off by the vibration of the activated carbon filter screen from adhering to the gaps of the activated carbon filter screen again under the action of the air suction force, so that the dust and other impurities can fall into the dust removal chamber.

[0019] Further, a groove is provided on one side of the wind deflector close to the activated carbon filter screen, and a ball for squeezing the activated carbon filter screen is provided in the groove, so as to improve the vibration effect on the activated carbon filter screen.

[0020] Further, an outer elastic member and an inner elastic member are respectively provided on the connecting rod, and the end of the activated carbon filter screen is arranged between the outer elastic member and the inner elastic member, which can not only play a role in installing and protecting the activated carbon filter screen, but also improve the vibration effect on the activated carbon filter screen.

[0021] Further, a sealing strip which is slidably and sealingly connected with the inner wall of the purification cylinder is also provided on the connecting rod. The sealing strip enables a relative gap to be formed between the activated carbon filter screen and the inner wall of the purification cylinder, so as to prevent dust from blocking between the activated carbon filter screen and the inner wall of the purification cylinder during the rotation of the roller. At the same time, the sealing strip can also form a relatively closed cavity on both sides of the air inlet, preventing air from flowing through the gap between the activated carbon filter screen and the inner wall of the purification cylinder. Meanwhile, as the roller rotates, the sealing strip can clean the inner wall of the purification cylinder, and the cooperation between the sealing strip and the elastic bump can improve the vibration effect on the activated carbon filter screen.

[0022] Further, an elastic component is provided between the photocatalyst filter screen and the inner wall of the lighting cavity. The elastic component includes a fixed sleeve connected to the inner wall of the lighting cavity, a guide rod slidably connected to the fixed sleeve, and a spring arranged between the fixed sleeve and the photocatalyst filter screen. The end of the guide rod is connected to the photocatalyst filter screen, and an inclined surface is provided at the end of the photocatalyst filter screen. This setting enables the photocatalyst filter screen to be in a movable space, thereby improving the contact effect between the photocatalyst filter screen and the activated carbon filter screen, so as to improve the purification effect on formaldehyde on the activated carbon filter screen.

[0023] Further, the driving mechanism includes:

[0024] A power member;

[0025] An accelerator, which is arranged between the power member and the exhaust fan;

[0026] A speed reducer, which is arranged at the output end of the power member;

[0027] An intermittent driving component, which is arranged at the output end of the speed reducer and drives the roller to rotate.

[0028] Thus, the power member drives the exhaust fan to rotate at a high speed through the accelerator, and drives the intermittent driving component to rotate at a low speed through the speed reducer, so as to finally drive the roller to rotate intermittently.

[0029] Based on the same inventive concept, the present invention provides a formaldehyde purification method, which includes using the above formaldehyde purification device to purify formaldehyde, and includes the following steps:

[0030] Step S1, under the action of an exhaust fan, air is inhaled into the purification cylinder from the air inlet;

[0031] Step S2, the air contacts the activated carbon filter screen on the drum, and formaldehyde is adsorbed onto the activated carbon filter screen;

[0032] Step S3, the driving mechanism drives the drum to rotate, so that the activated carbon filter screen adsorbed with formaldehyde rotates to one side of the lighting cavity;

[0033] Step S4, the catalyst filter screen in the lighting cavity contacts the activated carbon filter screen, and the ultraviolet lamp irradiates the catalyst filter screen to decompose formaldehyde into carbon dioxide and water;

[0034] Step S5, the purified air is discharged from the purification cylinder under the action of the exhaust fan.

[0035] Compared with the prior art, the present invention combines the physical adsorption method with the photocatalyst decomposition method, so that the air is first adsorbed by the activated carbon filter screen, and then driven by the driving mechanism, the activated carbon filter screen contacts the photocatalyst filter screen, and with the irradiation of the ultraviolet lamp, formaldehyde is separated into harmless carbon dioxide and water. During this process, the adsorption performance and service performance of the activated carbon filter screen basically do not decrease with the service time, thus avoiding the problems of increased cost caused by frequent replacement of the activated carbon filter screen and threats to human health. At the same time, it effectively solves the problem that the photocatalyst filter screen has a poor adsorption effect on formaldehyde, resulting in poor formaldehyde purification effect. Description of the Drawings

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0037] Figure 1 Shows a schematic diagram of a formaldehyde purification device proposed in an embodiment of the present application;

[0038] Figure 2 Shows a cross-sectional view of the purification cylinder in a formaldehyde purification device proposed in an embodiment of the present application;

[0039] Figure 3 Shows a cross-sectional view of the lighting cavity in a formaldehyde purification device proposed in an embodiment of the present application;

[0040] Figure 4 Shows a cross-sectional view of the dust removal cavity in a formaldehyde purification device proposed in an embodiment of the present application;

[0041] Figure 5Shows a schematic diagram of an intermittent drive assembly in a formaldehyde purification device proposed in an embodiment of the present application. Detailed implementation mode

[0042] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following combines the accompanying drawings and preferred embodiments to detail the specific implementation mode, structure, features and their effects of the present invention as follows.

[0043] The reference numerals in the specification drawings include: carrier plate 1, push rod 2, purification cylinder 3, air inlet 4, lighting cavity 5, operation panel 6, double-shaft motor 7, accelerator 8, reducer 9, exhaust fan 10, air duct 11, air passage 12, end cover 13, reflector 14, fixing sleeve 15, guide rod 16, spring 17, photocatalyst filter 18, ultraviolet lamp 19, activated carbon filter 20, fixing block 21, outer elastic member 22, connecting rod 23, inner elastic member 24, wind baffle 25, ball 26, elastic protrusion 27, sealing strip 28, dust removal cavity 29, slag discharge port 30, driven sprocket 31, radial groove 32, driving dial 33, dial post 34, locking disc 35.

[0044] A formaldehyde purification device, such as an embodiment Figure 1 As shown: it includes a purification cylinder 3, and the purification cylinder 3 is installed and fixed through a carrier plate 1. Multiple universal wheels with brake rods are arranged at the bottom of the carrier plate 1. A push rod 2 for pushing the carrier plate 1 is arranged on one side of the carrier plate 1. A driving mechanism is arranged on the carrier plate 1, including a motor, an accelerator 8, a reducer 9 and an intermittent drive assembly. In this embodiment, a double-shaft motor 7 is adopted. One output shaft of the double-shaft motor 7 drives the exhaust fan 10 located on the carrier plate 1 to rotate through a single-stage or multi-stage accelerator 8. The other output shaft of the double-shaft motor 7 drives an intermittent drive assembly to move through a single-stage or multi-stage reducer 9, so as to drive the roller inside the purification cylinder 3 to rotate intermittently. The top of the purification cylinder 3 is installed with an operation panel 6 through a bracket. The operation panel 6 is internally provided with a single-chip microcomputer controller, and multiple operation buttons are externally arranged on the operation panel 6 to control the startup of each equipment component in the formaldehyde purification device. An air inlet 4 is arranged on the front side of the purification cylinder 3, and the exhaust fan 10 is communicated with the inside of the purification cylinder 3 through one end of the purification cylinder 3.

[0045] As Figure 2 shown, in the counterclockwise direction, the inside of the purification cylinder 3 is respectively an air inlet 4, a dust removal cavity 29 and a lighting cavity 5; and a roller is installed inside the purification cylinder 3, including an end cover 13 arranged on the inner wall of one end of the purification cylinder 3 and rotatably connected to the purification cylinder 3, and six connecting rods 23 arranged on the circumferential end of the end cover 13 and parallel to the axis of the purification cylinder 3. The six connecting rods 23 are parallel to each other, forming six installation areas. Arc-shaped activated carbon filters 20 are respectively installed in the six installation areas, and the activated carbon filters 20 are elastically slidably connected to the connecting rods 23. As Figure 3 andFigure 4 As shown in the figure, an outer elastic member 22 and an inner elastic member 24 are respectively provided on the connecting rod 23. The end of the activated carbon filter screen 20 is arranged between the outer elastic member 22 and the inner elastic member 24. The outer elastic member 22 and the inner elastic member 24 are respectively horizontal and vertical elastic strips. Corresponding fixing blocks 21 are arranged at the ends of the connecting rod 23 to limit the outer elastic member 22.

[0046] In this embodiment, a relative gap can be formed between the activated carbon filter screen 20 and the inner wall of the purification cylinder 3 to prevent dust from clogging between the activated carbon filter screen 20 and the inner wall of the purification cylinder 3 during the rotation of the drum. Sealing strips 28 that are slidably and sealingly connected along this gap are arranged on the fixing blocks 21 at the ends of each connecting rod 23. The sealing strips 28 make the cavities on both sides of the air inlet 4 relatively airtight, preventing air from flowing through the gap between the activated carbon filter screen 20 and the inner wall of the purification cylinder 3. At the same time, as the drum rotates, the sealing strips 28 can clean the inner wall of the purification cylinder 3.

[0047] A photocatalyst filter screen 18 that can be attached to the activated carbon filter screen 20 and a ultraviolet lamp 19 that irradiates the photocatalyst filter screen 18 are provided in the lighting cavity 5. A reflector 14 facing the lighting cavity 5 is provided on the inner wall of one end of the purification cylinder 3 away from the end cover 13, and a wind baffle 25 that is located directly above the dust removal cavity 29 and is attached to the inner wall of the activated carbon filter screen 20 is provided. The reflector 14 can not only prevent the ultraviolet lamp 19 tube from irradiating outside the purification cylinder 3, but also improve the irradiation effect on the photocatalyst filter screen 18. The setting of the wind baffle 25 makes the air suction force on the activated carbon blocked by the wind baffle 25 when the activated carbon filter screen 20 passes above the dust removal cavity 29, preventing impurities such as dust shaken off by the vibration of the activated carbon filter screen 20 from adhering to the gaps of the activated carbon filter screen 20 again under the action of the air suction force, so that the dust and other impurities can fall into the dust removal cavity 29.

[0048] As Figure 3 shown, an elastic component is provided between the photocatalyst filter screen 18 and the inner wall of the lighting cavity 5. The elastic component includes a fixed sleeve 15 connected to the inner wall of the lighting cavity 5, a guide rod 16 slidably connected to the fixed sleeve 15, and a spring 17 provided between the fixed sleeve 15 and the photocatalyst filter screen 18. The end of the guide rod 16 is connected to the photocatalyst filter screen 18, and an inclined surface is provided at the end of the photocatalyst filter screen 18. The photocatalyst filter screen 18 includes a mounting frame and nano-scale titanium dioxide filled in the mounting frame.

[0049] As Figure 4 shown, elastic bumps that can squeeze the activated carbon filter screen 20 are provided in the dust removal cavity 29. A groove is provided on one side of the wind baffle 25 close to the activated carbon filter screen 20, and a ball 26 that can squeeze the activated carbon filter screen 20 is provided in the groove. A slag discharge port 30 is provided at the bottom of the dust removal cavity 29.

[0050] As Figure 2 andFigure 5 As shown in the figure, the intermittent drive mechanism adopts a Geneva mechanism, which includes a driving dial 33 driven by the output end of a speed reducer 9 and a driven Geneva wheel 31. The driving dial 33 is provided with a driving pin 34 and a locking disc 35, and the driven Geneva wheel 31 is provided with six radial slots 32 and a locking arc. When the driving pin 34 is engaged in the radial slot 32, the driven Geneva wheel 31 can be driven to rotate by 60°. When the locking disc 35 cooperates with the locking arc, the rotation of the driven Geneva wheel 31 can be prevented. The driven Geneva wheel 31 is connected to the end cover 13 through a connecting shaft, so as to drive the end cover 13 to rotate. The connecting shaft is a hollow shaft, and an air passage 12 is arranged inside the connecting shaft. The air inlet end of the air extractor 10 is provided with an air duct 11 communicated with one end of the air passage 12 away from the end cover 13, so as to facilitate the air extractor 10 to extract the gas in the purification cylinder 3.

[0051] Based on the same inventive concept, this embodiment provides a formaldehyde purification method, which includes purifying formaldehyde by using the above formaldehyde purification device, and includes the following steps:

[0052] Step S1, under the action of the air extractor 10, air is sucked into the purification cylinder 3 from the air inlet 4;

[0053] Step S2, the air contacts the activated carbon filter screen 20 on the drum, and formaldehyde is adsorbed onto the activated carbon filter screen 20;

[0054] Step S3, the drive mechanism drives the drum to rotate, so that when the activated carbon filter screen 20 adsorbed with formaldehyde passes through the dust removal chamber 29, the elastic bumps on the activated carbon filter screen 20 are mutually extruded, and the elastic sliding between the activated carbon filter screen 20 and the connecting rod 23 causes the activated carbon filter screen 20 to produce a slight vibration effect, thereby shaking off impurities such as dust adsorbed on the activated carbon filter screen 20 into the dust removal chamber 29;

[0055] Step S4, the activated carbon filter screen 20 adsorbed with formaldehyde rotates to one side of the lighting chamber 5, the catalyst filter screen in the lighting chamber 5 contacts the activated carbon filter screen 20, and the ultraviolet lamp 19 irradiates the catalyst filter screen to decompose formaldehyde into carbon dioxide and water;

[0056] Step S5, the purified air is discharged from the purification cylinder 3 under the action of the air extractor 10.

[0057] Compared with the prior art, in this embodiment, the activated carbon filter screen 20 is subjected to vibration dust removal treatment, which can not only prevent the activated carbon filter screen 20 from being blocked and affecting the use performance, but also improve the purification effect of formaldehyde by the photocatalyst filter screen 18 and the ultraviolet lamp subsequently. This embodiment combines the physical adsorption method with the photocatalyst decomposition method, so that the air is first adsorbed by the activated carbon filter screen 20, and then driven by the driving mechanism, the activated carbon filter screen 20 is brought into contact with the photocatalyst filter screen 18, and with the irradiation of the ultraviolet lamp, formaldehyde is decomposed into harmless carbon dioxide and water. During this process, the adsorption performance and use performance of the activated carbon filter screen 20 basically do not decrease with the use time, thus avoiding the problems of increased cost caused by frequent replacement of the activated carbon filter screen 20 and threats to human health. At the same time, it effectively solves the problem that the adsorption effect of the photocatalyst filter screen 18 on formaldehyde is poor, resulting in poor formaldehyde purification effect.

[0058] The above is only a preferred embodiment of the present invention, and it is not intended to limit the present invention in any form. Although the present invention has been disclosed above with the preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the equivalent embodiments by using the above-disclosed technical content within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any indirect modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A formaldehyde purification device, characterized in that, Comprising: A purification cylinder, one end of the purification cylinder is provided with an air inlet; A drum, arranged inside the purification cylinder, and a number of activated carbon filters are evenly arranged on the side wall of the drum; A lighting cavity, arranged on one side of the purification cylinder interior far from the air inlet, a photocatalyst filter capable of being attached to the activated carbon filter and an ultraviolet lamp for irradiating the photocatalyst filter are arranged in the lighting cavity; A driving mechanism for driving the drum to rotate and an exhaust fan communicated with the inside of the drum.

2. The formaldehyde purification device and purification method according to claim 1, characterized in that The drum includes: An end cover, arranged on the inner wall of one end of the purification cylinder and rotatably connected to the purification cylinder; A number of connecting rods, respectively arranged parallel to the circumferential end of the end cover and parallel to the axis of the purification cylinder; The activated carbon filters are arc-shaped and are respectively arranged between two adjacent connecting rods.

3. The formaldehyde purification device according to claim 2, characterized in that, The activated carbon filters are elastically and slidably connected to the connecting rods, a dust removal cavity located between the air inlet and the lighting cavity is arranged at the bottom inside the purification cylinder, and elastic bumps capable of squeezing the activated carbon filters are arranged in the dust removal cavity.

4. A formaldehyde purification device according to claim 3, characterized in that, A reflective cover facing the lighting cavity is arranged on the inner wall of a section of the purification cylinder far from the end cover, and a wind baffle located directly above the dust removal cavity and attached to the inner wall of the activated carbon filter is arranged.

5. The formaldehyde purification device according to claim 4, characterized in that, A groove is arranged on one side of the wind baffle close to the activated carbon filter, and balls capable of squeezing the activated carbon filter are arranged in the groove.

6. The formaldehyde purification device according to claim 2, characterized in that, Outer elastic members and inner elastic members are respectively arranged on the connecting rods, and the ends of the activated carbon filters are arranged between the outer elastic members and the inner elastic members.

7. A formaldehyde purification device according to claim 6, wherein, Sealing strips slidably and hermetically connected to the inner wall of the purification cylinder are also arranged on the connecting rods.

8. A formaldehyde purification device according to claim 7, characterized in that, An elastic component is arranged between the photocatalyst filter and the inner wall of the lighting cavity, the elastic component includes a fixed sleeve connected to the inner wall of the lighting cavity, a guide rod slidably connected to the fixed sleeve, and a spring arranged between the fixed sleeve and the photocatalyst filter, the end of the guide rod is connected to the photocatalyst filter, and an inclined surface is arranged at the end of the photocatalyst filter.

9. A formaldehyde purification device according to claim 1, characterized in that, The driving mechanism includes: A power component; An accelerator, arranged between the power component and the exhaust fan; A speed reducer, arranged at the output end of the power component; An intermittent driving component, arranged at the output end of the speed reducer and driving the drum to rotate.

10. A formaldehyde purification method, characterized in that, Comprising purifying formaldehyde by using the formaldehyde purification device according to any one of claims 1-9, including the following steps: Step S1, under the action of the exhaust fan, air is sucked into the purification cylinder from the air inlet; Step S2, the air contacts the activated carbon filters on the drum, and formaldehyde is adsorbed onto the activated carbon filters; Step S3, the driving mechanism drives the drum to rotate, so that the activated carbon filters adsorbed with formaldehyde rotate to the side of the lighting cavity; Step S4, the photocatalyst filter in the lighting cavity contacts the activated carbon filters, and the ultraviolet lamp irradiates the photocatalyst filter to decompose formaldehyde into carbon dioxide and water; Step S5, the purified air is discharged from the purification cylinder under the action of the exhaust fan.

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