Electrostatic Filter Device of Air Purification Equipment and Its Usage Method

Abstract

The present invention discloses an electrostatic filter element device for an air purification device, comprising: a fan, a filter cartridge and a heater. The air purification device has an air inlet, an air outlet, a fan chamber and a filter cartridge chamber. The filter cartridge chamber is arranged on the filtration channel between the air inlet and the air outlet. A heater is arranged inside the filter cartridge. The filter material used for the filter cartridge is non-woven fabric loaded with electret. The fan chamber is communicated with the filter cartridge chamber. A fan is arranged inside the fan chamber. The air outlet end of the fan is communicated with the air outlet. The present invention also discloses a usage method of the electrostatic filter element device for the air purification device, comprising the following steps: Step (1): After the air purification device is normally used each time, turn on the heater, and at this time the fan is turned off; Step (2): The heater heats for 10 to 30 minutes, the surface temperature of the filter element reaches 140°C to 160°C, turn on the fan, the air volume of the fan is 200 m 3 / h to 15000 m 3 / h, the heater continues to heat for 10 to 40 minutes, and then the heater is turned off, and the fan continues to operate normally.

Description

Technical Field

[0001] The present invention relates to the technical field of air purification equipment, and particularly relates to an electrostatic filter element device for an air purification equipment and a using method thereof. Background Art

[0002] An air purifier can effectively purify indoor air, and can remove dust, pathogens and other substances in the air through a filter element. In the production of the existing filter element of an air purifier, an electret process is used to electretize the melt-blown cloth, so that the filter element is charged, and the filter element can capture fine particles through electrostatic adsorption, greatly improving the filtration efficiency.

[0003] However, after being put into use, factors such as moisture in the air environment and neutralization of the captured particulate matter will cause the charge of the filter element to lose, and after losing the charge, the filtration efficiency of the filter element will decrease. After being normally used for 3 months, it will decrease from 99.99% when newly put into use to below 95%.

[0004] In view of this, the inventor of the present invention has designed the present invention. Summary of the Invention

[0005] The purpose of the present invention is to provide an electrostatic filter element device for an air purification equipment and a using method thereof, which have the characteristics of high filtration efficiency.

[0006] To achieve the above purpose, the technical solution of the present invention is:

[0007] An electrostatic filter element device for an air purification equipment, comprising: a fan, a filter cartridge and a heater. The air purification equipment has an air inlet, an air outlet, a fan chamber and a filter cartridge chamber. The filter cartridge chamber is arranged on a filtering channel between the air inlet and the air outlet. The filter cartridge chamber houses the filter cartridge. A heater is arranged inside the filter cartridge. The filtering material adopted by the filter cartridge is a non-woven fabric loaded with electret. The fan chamber is communicated with the filter cartridge chamber. A fan is housed in the fan chamber. The air outlet end of the fan is communicated with the air outlet.

[0008] The heater is arranged on the central axis of the filter cartridge.

[0009] The heater is a heating pipe, and the heater stands inside the filter cartridge.

[0010] The non-woven fabric is a high-temperature resistant material.

[0011] The non-woven fabric is spun from one or more of aramid fiber, polyphenylene sulfide fiber, polytetrafluoroethylene fiber and polyimide fiber.

[0012] The electret is boehmite, silicon nitride, tourmaline, silicon dioxide or barium titanate.

[0013] The electret-loaded nonwoven fabric is formed by soaking / spraying the nonwoven fabric with an electret dispersion liquid.

[0014] The electret-loaded nonwoven fabric is formed by an electret sandwich layer in the middle of the nonwoven fabric.

[0015] The electret-loaded nonwoven fabric is formed by blending the electret with the nonwoven fabric.

[0016] A method for using the electrostatic filter element device of the above air purification equipment includes the following steps: Step (1): After the air purification equipment is normally used each time, turn on the heater, and at this time, the fan is turned off; Step (2): The heater heats for 10 - 30 minutes, the surface temperature of the filter element reaches 120°C - 160°C, the fan is turned on, and the air volume of the fan is 200 m 3 / h - 15000 m 3 / h, the heater continues to heat for 10 - 40 minutes, and then the heater is turned off, and the fan continues to operate normally.

[0017] After adopting the above technical solution, through the setting of the heater and the fan, the present invention uses the heater to heat the filter cartridge, evaporate the moisture on the surface of the filter cartridge, form a dry environment, which is conducive to triboelectrification, thereby improving the filtration effect. At this time, the fan is in the off state; and then, by cooperating with the startup of the fan, a negative pressure is generated, and the filtered air flow causes friction between the fibers of the filter material of the filter cartridge, that is, there is a triboelectrification effect, and the generated charges are enriched on the surface of the filter material of the filter cartridge, making the filter cartridge enriched with static electricity, and combined with the electret, improving the electric potential and slowing down the attenuation degree of the electric potential, which is conducive to electrostatic adsorption and dust removal, and improving the filtration effect of the electrostatic filter element device of the air purification equipment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the electrostatic filter element device of the air purification equipment of the present invention;

[0019] Figure 2 It is a simple cross-sectional view of the electrostatic filter element device of the air purification equipment of the present invention.

[0020]

SYMBOL DESCRIPTION

[0021] Air purification equipment 1

[0022] Fan chamber 11 Filter cartridge chamber 12

[0023] Fan 2

[0024] Filter cartridge 3

[0025] Heater 4. DETAILED DESCRIPTION OF THE INVENTION

[0026] To achieve the above objects and effects, the technical means and structure adopted in the present invention are described in detail below with reference to the preferred embodiments of the present invention to facilitate a complete understanding of its features and functions.

[0027] Please refer to Figures 1 to 2 As shown, the present invention discloses an electrostatic filter element device for an air purification device, including: a fan 2, a filter cartridge 3, and a heater 4. The air purification device 1 has an air inlet, an air outlet, a fan chamber 11, and a filter cartridge chamber 12. The filter cartridge chamber 12 is provided on the filtration passage between the air inlet and the air outlet. The filter cartridge chamber 12 houses the filter cartridge 3. A heater 4 is provided inside the filter cartridge 3. The filter material used for the filter cartridge 3 is non-woven fabric loaded with electrets. The fan chamber 11 communicates with the filter cartridge chamber 12. The fan 2 is housed in the fan chamber 11. The air outlet end of the fan 2 communicates with the air outlet.

[0028] Furthermore, in order to make the heater 4 heat the filter cartridge 3 evenly, the heater 4 can be provided on the central axis of the filter cartridge 3; among them, preferably, the heater 4 is a heating tube, and the heater 4 stands inside the filter cartridge 3; the heating tube can be an infrared heating lamp tube or a resistance wire heating tube, with a power of 200w - 5000w; preferably, when the heating tube is an infrared heating lamp tube, the length of the infrared heating lamp tube is 50% - 90% of the height of the filter cartridge 3; when the heating tube is a resistance wire heating tube, the length of the resistance wire heating tube is 50% - 90% of the height of the filter cartridge 3. The way of heating the filter cartridge by the infrared heating lamp tube includes radiation heating and heat conduction of the heat generated by the lamp tube to heat the air.

[0029] Next, the non-woven fabric can be a high-temperature resistant material; preferably, the non-woven fabric can be made of one or more of aramid fiber, polyphenylene sulfide fiber, polytetrafluoroethylene fiber, and polyimide fiber. These materials will not soften or age at 140 - 160°C, and at the same time have good electrical insulation performance, are extremely easy to generate static electricity under air friction at high temperatures, and the static electricity is stable and not easy to fade; the electret can be boehmite (γ-AlOOH), silicon nitride (Si3N₄), tourmaline, silicon dioxide (SiO₂), or barium titanate (BaTiO₃).

[0030] Furthermore, in order to facilitate the production of non-woven fabric loaded with electrets, the non-woven fabric loaded with electrets can be formed by soaking / spraying the non-woven fabric with an electret dispersion liquid; the non-woven fabric loaded with electrets can also be formed by sandwiching the electret between the non-woven fabrics; the non-woven fabric loaded with electrets can also be formed by mixing the electret with the non-woven fabric.

[0031] The present invention also discloses a method for using the electrostatic filter element device of the air purification equipment of the present invention, including the following steps: Step (1): After the air purification equipment 1 is normally used each time, turn on the heater 4, and at this time, the fan 2 is turned off. Among them, the air purification equipment 1 can turn on the heater 4 after being normally used for 8 to 100 hours; Step (2): The heater 4 is heated for 10 to 30 minutes to preheat and create a dry environment, which is beneficial to triboelectrification. The surface temperature of the filter element reaches 120 °C to 160 °C, and the fan 2 is turned on. The air volume of the fan 2 is 200 m 3 / h to 15000 m 3 / h, the heater 4 continues to heat for 10 to 40 minutes, and then the heater 4 is turned off, and the fan 2 continues to operate normally. That is, after a normal triboelectrification cycle of the air purification equipment of the present invention, the fan 2 returns to the normal working state.

[0032] Among them, the normal operation of the air purification equipment of the present invention originally requires the fan 2 to be turned on. Before the air purification equipment enters the heating state from the operating state, the fan 2 is always in the on state. After the heating ends and enters the operating state again, the fan 2 also needs to be always turned on. The operation of turning off the fan 2 in the middle is to accumulate heat and prevent the wind from taking away the heat, ensuring that the filter element and the surrounding air can be heated to the required temperature, and then maintaining the heating and the fan on state, and the air friction heats the filter material to achieve the effect of triboelectrification. At this time, the air volume is set to 30%-60% of the rated air volume to ensure that the heat taken away is balanced with the heat provided by the heater 4. When the electrostatic load is completed, the heater 4 is turned off, and for the air purification equipment to continue to work, the fan 2 must continue to work until the air purification equipment is to be turned off and then the fan 2 is turned off.

[0033] Example 1

[0034] In the electrostatic filter element device of the air purification equipment of the present invention, the rated air volume of the fan 2 is 3000 m 3 / h, the non-woven fabric is polyphenylene sulfide, and the heater 4 is an infrared heating lamp tube with a power of 750W. The filtration effect of the filter cartridge 3 without the heater and the fan turned on is the corresponding filtration efficiency before supplementation in the following table. After measuring the filtration efficiency before supplementation, turn on the fan 2 and run for 24 hours, then turn on the heater 4, and at the same time temporarily turn off the fan 2. Heat for 10 minutes. At this time, the surface temperature of the filter cartridge 3 is 120 ± 3 °C. Turn on the fan 2, and the air volume of the fan 2 is set to 40% of the rated air volume. Keep the heater 4 heating for another 10 minutes (that is, the total heating time is 20 minutes), and then turn off the heater 4, and keep the fan 2 in the normal working state of being turned on. Repeat 5 times with a 24-hour cycle. Test the filtration efficiency 3 hours after each electrostatic replenishment of the air purification equipment. The filtration efficiency is calculated by separately testing the inlet dust concentration and the outlet dust concentration of the air purification equipment; the filtration efficiency can also be obtained according to the PM2.5 concentration.

[0035]

[0036] Example 2

[0037] In the electrostatic filter element device of the air purification equipment of the present invention, the rated air volume of the fan 2 is 2000 m 3 / h, the non-woven fabric is aramid, and the heating tube is a resistance wire heating tube with a power of 1500 W. The filtration effect of the filter cartridge 3 with the heater and the fan turned on is the corresponding filtration efficiency before supplementation in the following table. After measuring the filtration efficiency before supplementation, turn on the fan and run it for 24 h, then turn on the heater 4, and at the same time temporarily turn off the fan 2. Heat for 15 min. At this time, the surface temperature of the filter cartridge 3 is 140 ± 5 °C. Turn on the fan 2, and set the air volume of the fan 2 to 50% of the rated air volume. Keep the heater 4 heating for another 10 min (i.e., the total heating time is 25 min), then turn off the heater 4, and keep the fan 2 turned on in the normal working state. Repeat this process 5 times with a 24-h cycle. Test the filtration efficiency of the air purification equipment 3 h after each electrostatic supplementation. The filtration efficiency is calculated by separately testing the inlet dust concentration and the outlet dust concentration of the air purification equipment; the filtration efficiency can also be obtained according to the PM2.5 concentration.

[0038]

[0039] To sum up, through the settings of the heater 4 and the fan 2, the present invention uses the heater 4 to heat the filter cartridge 3, causing the moisture on the surface of the filter cartridge 3 to evaporate, forming a dry and high-temperature environment, which is conducive to triboelectrification, thereby improving the filtration effect. At this time, the fan 2 is in the off state; and then, in cooperation with starting the fan 2, a negative pressure is generated, and the filtered air flow causes friction between the fibers of the filter material of the filter cartridge 3, that is, there is a triboelectrification effect, and the generated charges are enriched on the surface of the filter material of the filter cartridge 3, causing the filter cartridge 3 to be electrostatically enriched, and combined with the electret, the electric potential is increased and the attenuation degree of the electric potential is slowed down, which is conducive to electrostatic adsorption dust removal and improves the filtration effect of the electrostatic filter element device of the air purification equipment of the present invention.

[0040] The technical content and technical features of the present invention have been disclosed as above. The composition of the present invention is not limited to the above. Those skilled in the art may still make various substitutions and modifications that do not deviate from the creative spirit of the present invention based on the disclosure of the present invention. Therefore, the protection scope of the present invention should not be limited to what is disclosed in the embodiments, but should include various substitutions and modifications that do not deviate from the present invention and are covered by the claims.

Claims

1. An electrostatic filter device for an air purification equipment, characterized in that, Comprising: A fan, a filter cartridge and a heater. The air purification device has an air inlet, an air outlet, a fan chamber and a filter cartridge chamber. The filter cartridge chamber is arranged on the filtration passage between the air inlet and the air outlet. The filter cartridge chamber houses the filter cartridge. A heater is arranged inside the filter cartridge. The filter material used for the filter cartridge is non-woven fabric loaded with electret. The non-woven fabric is spun from one or more of aramid fiber, polyphenylene sulfide fiber, polytetrafluoroethylene fiber, and polyimide fiber; The fan chamber is communicated with the filter cartridge chamber. A fan is housed in the fan chamber. The air outlet end of the fan is communicated with the air outlet; The heater is an infrared heating lamp tube arranged on the central axis of the filter cartridge, and its length is 50% - 90% of the height of the filter cartridge; The heating method of the infrared heating lamp tube for the filter cartridge includes radiation heating and heat conduction of the heat generated by the lamp tube to heat the air. The non-woven fabric generates static electricity under the friction of air at high temperature.

2. The electrostatic filter element device of the air purification device according to claim 1, wherein: The electret is boehmite, silicon nitride, tourmaline, silicon dioxide or barium titanate.

3. The electrostatic filter element device of the air purification device according to claim 1, wherein: The non-woven fabric loaded with electret is formed by soaking / spraying the non-woven fabric with an electret dispersion liquid.

4. The electrostatic filter element device of the air purification device according to claim 1, wherein: The non-woven fabric loaded with electret is formed by sandwiching the electret between the non-woven fabrics.

5. The electrostatic filter element device of the air purification device according to claim 1, wherein: The non-woven fabric loaded with electret is formed by blending the electret with the non-woven fabric.

6. A method for using an electrostatic filter element device of an air purification device according to any one of claims 1 to 5, characterized in that, Including the following steps: Step (1): After each normal use of the air purification device, turn on the heater, and at this time the fan is turned off; Step (2): The heater is heated for 10 to 30 minutes until the surface temperature of the filter element reaches 120°C to 160°C, then the fan is turned on, and the air volume of the fan is 200 m 3 / h to 15000 m 3 / h. The heater continues to heat for 10 to 40 minutes, and then the heater is turned off while the fan continues to operate normally.

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