A household microwave electrodeless lamp formaldehyde removal device and a use method thereof

Abstract

The present application belongs to the technical field of new purification equipment, and particularly relates to a household microwave electrodeless lamp formaldehyde removal device and a use method thereof. The device comprises a high-speed liquid-gas flow generation system, a microwave generation system, a resonance cavity, an exhaust fan, an activated carbon fiber net, a partition plate, a U-shaped electrodeless lamp installed on a lamp tube holder, the high-speed liquid-gas flow generation system comprises a throat pipe, a small hole, a Venturi tube contraction section, a humidity sensor, a water tank and an air inlet fan, and the microwave generation system comprises an excitation cavity, a magnetron and a microwave power supply. The device can remove dust in the gas, and the microwave electrodeless lamp can efficiently remove formaldehyde. The device is suitable for household use, has a small size, is convenient to move, has a simple structure, is low in cost, and is convenient for large-scale popularization and use.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of new purification equipment, and particularly relates to a household microwave electrodeless lamp formaldehyde removal device and a use method thereof. BACKGROUND

[0002] With the rapid development of the building decoration industry, indoor decoration materials mainly using artificial boards often use resin as an adhesive, and the main component is formaldehyde. Since formaldehyde has a long release period, it will cause serious indoor formaldehyde pollution. Formaldehyde is a primary toxic substance that can combine with protein and is a human carcinogen. Short-term exposure to formaldehyde can irritate the eyes and upper respiratory tract, causing symptoms such as coughing, nausea, chest tightness, and headaches. Long-term exposure to formaldehyde can cause chronic respiratory diseases, damage to the liver and lungs, and harm to the central nervous system and immune function, and even damage to intracellular genetic material. Therefore, it is necessary to take measures to reduce the content of indoor formaldehyde.

[0003] At present, common indoor formaldehyde removal methods include ventilation dilution method, adsorption purification method, green plant method, plasma method, and photocatalytic oxidation method. The ventilation dilution method refers to introducing new air into the room to form a convection and promote indoor gas circulation. However, since the release of formaldehyde has a long period, this method usually needs a long time to remove formaldehyde. The adsorption purification method refers to using porous materials such as activated carbon and zeolite to adsorb indoor formaldehyde due to their large specific surface area and developed pore structure. However, when the adsorbent is saturated, desorption may occur, further causing secondary pollution in the room. The green plant method refers to using the stems and leaves of aloe, spider plant, and agave to absorb formaldehyde. However, this method requires a long period and is only suitable for low-concentration formaldehyde content in the room. When the formaldehyde content is high, it will cause damage to the plants. The plasma method uses a high-energy electron generator to generate high-energy electrons and carrier gas collisions to generate high-activity species in the discharge process to oxidize formaldehyde into small molecules. However, this method is limited in practical application due to the high cost and high energy consumption of the required plasma generation equipment. The photocatalytic oxidation method refers to the case where the energy of light is greater than or equal to the band gap of the catalyst. The electrons in the valence band will jump to the conduction band, and holes will be formed at the corresponding position, thereby forming a high-activity photoelectron-hole pair. Electrons and holes can capture O2 and H2O in the system to generate superoxide radicals and hydroxyl radicals, which non-selectively degrade indoor pollutants. However, this method has problems such as high cost, high energy consumption, and easy deactivation of the catalyst, which limits the application of this technology. Considering the various shortcomings of the above technologies, a small household microwave electrodeless lamp formaldehyde removal device with low cost, high efficiency, and wide application range is designed. SUMMARY

[0004] In order to solve the problems of long time consumption, expensive equipment, high energy consumption and high cost existing in the existing formaldehyde removal technology, the application provides a household microwave electrodeless lamp formaldehyde removal device and a use method thereof.

[0005] The technical scheme adopted by the application is:

[0006] The household microwave electrodeless lamp formaldehyde removal device comprises a resonant cavity, a high-speed liquid-gas flow generation system and a microwave generation system.

[0007] Four partition plates are fixedly installed on the cavity wall of the resonant cavity in a horizontal parallel staggered arrangement from top to bottom in the vertical direction.

[0008] A high-speed liquid-gas flow generation system is directly connected to the lower part of the cavity wall of the resonant cavity through a rectangular opening.

[0009] A microwave generation system is arranged below the resonant cavity and comprises an excitation cavity, a magnetron and a microwave power supply.

[0010] Further, the household microwave electrodeless lamp formaldehyde removal device comprises a high-speed liquid-gas flow generation system which is directly connected to the lower part of the cavity wall of the resonant cavity through a rectangular opening.

[0011] Further, the household microwave electrodeless lamp formaldehyde removal device comprises a high-speed liquid-gas flow generation system which is directly connected to the lower part of the cavity wall of the resonant cavity through a rectangular opening.

[0012] Further, the household microwave electrodeless lamp formaldehyde removal device comprises a high-speed liquid-gas flow generation system which is directly connected to the lower part of the cavity wall of the resonant cavity through a rectangular opening.

[0013] Further, the household microwave electrodeless lamp formaldehyde removal device comprises a high-speed liquid-gas flow generation system which is directly connected to the lower part of the cavity wall of the resonant cavity through a rectangular opening.

[0014] Further, the household microwave electrodeless lamp formaldehyde removal device comprises a high-speed liquid-gas flow generation system which is directly connected to the lower part of the cavity wall of the resonant cavity through a rectangular opening.

[0015] Further, the above-mentioned household microwave electrodeless lamp formaldehyde removal device, the length, width and height of the resonant cavity are 50 cm*30 cm*60 cm respectively, and the length and width of the partition are 50 cm*20 cm.

[0016] Further, the above-mentioned household microwave electrodeless lamp formaldehyde removal device, the active carbon fiber net is installed on the bottom of the resonant cavity through conductive glue.

[0017] The use method of the above-mentioned household microwave electrodeless lamp formaldehyde removal device is as follows: the high-speed liquid-gas flow generating system is turned on, the formaldehyde-containing gas is introduced into the Venturi tube contraction section through the inlet fan, and then the gas is compressed to pass through the throat at a high flow rate, at the same time, the water in the water tank enters the throat through the small hole of the humidity sensor and the throat, and then is impacted by the high-speed airflow to form mist droplets into the resonant cavity, the dust particles in the gas are condensed into larger particles with the liquid droplets, and the dust particles are settled in the active carbon fiber net in the subsequent expansion section, so that the dust in the gas is removed; then, the microwave generating system is turned on, the formaldehyde-containing gas in the resonant cavity is fed into the resonant cavity through the partition from bottom to top, the microwave power supply, the magnetron and the excitation cavity, the rare gas in the U-shaped electrodeless lamp on the partition is excited to generate low-pressure plasma, the heat generated by the plasma discharge makes the evaporable metal into a vapor state, and when returning to the ground state, ultraviolet radiation corresponding to the evaporable metal occurs, and the formaldehyde is oxidized by the hydroxyl radical oxygen produced by the ultraviolet photolysis H2O and then is degraded; the heat generated by the U-shaped electrodeless lamp during use is discharged together with the gas after the formaldehyde is removed through the exhaust fan.

[0018] Further, the use method of the above-mentioned household microwave electrodeless lamp formaldehyde removal device, the humidity sensor can adjust the water outlet state of the water tank according to the indoor humidity condition.

[0019] The beneficial effects of the present application are:

[0020] The device includes a dust removal stage, which can reduce the influence of dust on the effect of the U-shaped electrodeless lamp, thereby prolonging the service life of the U-shaped electrodeless lamp; the device is provided with a humidity sensor, which can adjust the water outlet state of the water tank according to the indoor humidity condition, on the one hand, the water droplets sprayed from the small hole are impacted by the entering high-speed airflow to form mist droplets, which is beneficial to the removal of dust, on the other hand, since water molecules belong to polar molecules, they can produce a heat effect under the action of microwaves to increase the air temperature, which is beneficial to the desorption and removal of formaldehyde; the purified gas of the device carries a large amount of heat to increase the indoor temperature, which further promotes the release of formaldehyde; the microwave electrodeless lamp used in the device can efficiently degrade formaldehyde and has low cost; the active carbon fiber net and the U-shaped electrodeless lamp of the device are replaceable and detachable elements, and the replacement operation is simple and easy; the device is suitable for household use, has a small size, is easy to move, has a simple structure, low cost and is easy to popularize and use on a large scale. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 Structure diagram of the device for removing formaldehyde by household microwave electrodeless lamp.

[0022] Figure 2 Front view of the contraction port of the Venturi tube contraction section.

[0023] In the figure: 1, exhaust fan, 2, lamp holder, 3, partition, 4, activated carbon fiber net, 5, excitation cavity, 6, magnetron, 7, microwave power supply, 8, small hole, 9, Venturi tube contraction section, 10, humidity sensor, 11, water tank, 12, U-shaped electrodeless lamp, 13, resonant cavity, 14, throat pipe, 15, air inlet fan. DETAILED DESCRIPTION

[0024] Example 1: Device for removing formaldehyde by household microwave electrodeless lamp

[0025] The device for removing formaldehyde by household microwave electrodeless lamp comprises a resonant cavity 13, a high-speed liquid-gas flow generating system, and a microwave generating system. The high-speed liquid-gas flow generating system is directly connected to the opening at the lower part of the cavity wall on one side of the resonant cavity 13, and comprises a throat pipe 14, a small hole 8, a Venturi tube contraction section 9, a humidity sensor 10, a water tank 11, and an air inlet fan 15. The microwave generating system is arranged below the resonant cavity 13 and comprises an excitation cavity 5, a magnetron 6, and a microwave power supply 7.

[0026] The resonant cavity 13 is a cuboid cavity with a length of 50 cm, a width of 30 cm, and a height of 60 cm.

[0027] An exhaust fan 1 is embedded and installed on the upper part of the cavity wall on one side of the resonant cavity 13, and an activated carbon fiber net 4 is installed on the bottom surface of the resonant cavity 13 through conductive glue.

[0028] Four partition plates 3 are fixedly installed on the cavity wall of the resonant cavity 13 in a vertical direction from top to bottom, with the four partition plates 3 being arranged horizontally and parallel to each other in a staggered manner. The length and width of each partition plate 3 are 50 cm and 20 cm, respectively. Each partition plate 3 is provided with a lamp holder 2, and a U-shaped electrodeless lamp 12 is installed on the lamp holder 2 so as to be positioned at the edge of the partition plate 3.

[0029] The activated carbon fiber net 4 and the U-shaped electrodeless lamp 12 are both detachable and replaceable components.

[0030] A rectangular port is opened in the lower part of the side wall of the resonant cavity 13 to directly communicate with the outward throat pipe 14, and the small holes 8 are arranged on the upper surface of the throat pipe 14, and the humidity sensor 10 is carried on the upper surface of the throat pipe 14, and the water tank 11 is above the humidity sensor 10; The contraction port of the Venturi tube contraction section 9 is communicated outwardly with the throat pipe 14, and the Venturi tube contraction section 9 is a hollowed-out inclined quadrangular prism shell, and the upper bottom surface is a rectangle with a length of 20 cm and a width of 10 cm, the lower bottom surface is a square with a side length of 40 cm, and the height is 20 cm; An air inlet fan 15 is installed on the upper and lower opposite shells of the Venturi tube contraction section 9, respectively, near the opening.

[0031] The microwave generating system is arranged below the resonant cavity 13, the microwave power supply 7 is a MEGMEET WepeX 1000A air-cooled power supply, and the magnetron 6 is a Toshiba air-cooled magnetron 2M248J(SJ); The microwave power supply 7 converts the input alternating current into high-voltage direct current through a step-up transformer and a rectifier to provide stable voltage and current for the magnetron; The magnetron 6 is composed of a permanent magnet, a tube core and the like, and the tube core includes an anode, a cathode and an antenna, the anode is connected with the high-voltage output end of the microwave power supply 7, the cathode is connected with the low-voltage direct current output end of the microwave power supply 7, the cathode of the tube core emits electrons under the excitation of high voltage provided by the microwave power supply 7, and the electrons move to the anode under the action of the electric field, and the electrons are oscillated by the force perpendicular to the magnetic field in the movement process, and the microwave is excited, so that the energy obtained by the electrons from the electric field is converted into microwave energy; The excitation cavity 5 is used for effectively transmitting the microwave energy generated by the magnetron 6 to the resonant cavity 13, and the excitation cavity 5 is connected with the antenna of the magnetron 6 through a feed port; The resonant cavity 13 forms a stable standing wave field distribution in the cavity to realize the enhancement and modulation of the microwave signal, and the resonant cavity 13 is directly communicated with the excitation cavity 5, and there is a coupling hole on the common wall of the two, so that the microwave can be transmitted between the two cavities.

[0032] The use method of the household microwave electrodeless lamp formaldehyde removal device in embodiment 2

[0033] The removal of formaldehyde by the household microwave electrodeless lamp formaldehyde removal device includes a dust removal stage and a degradation stage.

[0034] In the dust removal stage, the high-speed liquid-gas flow generating system is started, the formaldehyde-containing gas is introduced into the Venturi tube contraction section 9 through the air inlet fan 15, and then the gas is compressed and flows at a high speed through the throat pipe 14, at the same time, the water in the water tank 11 enters the throat pipe 14 through the small holes 8 and the humidity sensor 10 (the humidity sensor 10 can adjust the water outlet state of the water tank 11 according to the indoor humidity), and then is impacted by the high-speed airflow to form mist droplets into the resonant cavity 13, the dust particles in the gas are condensed into larger particles with the liquid droplets, and the dust particles are settled in the activated carbon fiber net 4 due to the gravity in the subsequent expansion section, so that the dust removal of the gas is realized.

[0035] Degradation stage: then, the microwave generating system is started, the dust-removed formaldehyde-containing gas in the resonant cavity 13 passes through the self-down partition 3, and the microwave is fed into the resonant cavity 13 through the microwave power supply 7, the magnetron 6 and the excitation cavity 5, the U-shaped electrodeless lamp 12 placed on the partition 3 is a closed shell filled with rare gas and evaporable metal guide quartz glass, the rare gas in the U-shaped electrodeless lamp 12 is excited to generate low-pressure plasma, the heat generated by plasma discharge makes the evaporable metal into vapor state, and when returning to the ground state, the corresponding ultraviolet radiation of the evaporable metal occurs, the formaldehyde is oxidized by the hydroxyl radical oxygen produced by the ultraviolet photolysis H2O and then degraded; the heat generated by the U-shaped electrodeless lamp 12 in the use process will be discharged together with the gas after removing the formaldehyde through the exhaust fan 1.

Claims

1. A domestic microwave electrodeless lamp formaldehyde removal device, comprising a resonant cavity (13), a high-speed liquid-gas flow generation system and a microwave generation system, characterized in that, The resonant cavity (13) is a cuboid cavity, an exhaust fan (1) is inlaid and installed on the upper part of the cavity wall of the resonant cavity (13), and an activated carbon fiber net (4) is installed on the bottom surface of the resonant cavity (13); Four baffle plates (3) are fixedly installed on the cavity wall of the resonant cavity (13) in a horizontal parallel staggered arrangement from top to bottom in the vertical direction, one lamp holder (2) is arranged on each baffle plate (3), and a U-shaped electrodeless lamp (12) is installed on the lamp holder (2) and arranged at the edge of the baffle plate (3); A high-speed liquid-gas flow generating system is directly connected to the lower part of the cavity wall of the resonant cavity (13) through an opening, and the high-speed liquid-gas flow generating system comprises a throat pipe (14), a small hole (8), a Venturi tube contraction section (9), a humidity sensor (10), a water tank (11) and an air inlet fan (15); A microwave generating system is arranged below the resonant cavity (13) and comprises an excitation cavity (5), a magnetron (6) and a microwave power supply (7); The lower part of the cavity wall of the resonant cavity (13) is directly connected to the outside through a rectangular opening of a throat pipe (14), the upper surface of the throat pipe (14) is provided with a small hole (8), the throat pipe (14) carries a humidity sensor (10) above, and the water tank (11) is above the humidity sensor (10); The throat pipe (14) is connected to the outside through a contraction opening of a Venturi tube contraction section (9), the Venturi tube contraction section (9) is a hollow inclined quadrangular frustum shell, and an air inlet fan (15) is arranged on each of the upper and lower shells of the Venturi tube contraction section (9) near the opening.

2. The device for removing formaldehyde according to claim 1, characterized in that, The excitation cavity (5) is directly connected to the resonant cavity (13).

3. The device for removing formaldehyde according to claim 1, characterized in that, The activated carbon fiber net (4) and the U-shaped electrodeless lamp (12) are detachably replaced.

4. The device for removing formaldehyde according to claim 1, characterized in that, The length, width and height of the resonant cavity (13) are 50 cm, 30 cm and 60 cm respectively, and the length and width of the baffle plate (3) are 50 cm and 20 cm respectively.

5. The device for removing formaldehyde according to claim 1, wherein The upper bottom surface of the Venturi tube contraction section (9) is a rectangle with a length of 20 cm and a width of 10 cm, the lower bottom surface is a square with a side length of 40 cm, and the height is 20 cm.

6. A device for removing formaldehyde from a room using a domestic microwave electrodeless lamp according to claim 1, characterized in that, The activated carbon fiber net (4) is installed on the bottom of the resonant cavity (13) through conductive glue.

7. The method of using a domestic microwave electrodeless lamp device for removing formaldehyde according to any one of claims 1-6, characterized in that, The method is as follows: open the high-speed liquid-gas flow generation system, introduce the formaldehyde-containing gas into the Venturi tube contraction section (9) through the inlet fan (15), and then the gas is compressed to pass through the throat (14) at high speed, at the same time, the water in the water tank (11) enters through the humidity sensor (10), the small hole (8) of the throat (14), and then is impacted by the high-speed airflow into the resonant cavity (13) in the form of mist droplets, the dust particles in the gas and the liquid droplets coagulate into larger particles, which are settled in the activated carbon fiber net (4) in the subsequent expansion section due to the action of gravity, realizing dust removal of the gas; then, the microwave generation system is started, the dust-removed formaldehyde-containing gas in the resonant cavity (13) passes through the upward partition (3), and the microwave is fed into the resonant cavity (13) through the microwave power supply (7), the magnetron (6) and the excitation cavity (5), the rare gas in the U-shaped electrodeless lamp (12) on the partition (3) is excited to generate low-pressure plasma, and the evaporable metal is changed into vapor state by the heat generated by plasma discharge, and when it returns to the ground state, it will produce ultraviolet radiation corresponding to the evaporable metal, and the formaldehyde is oxidized by the hydroxyl radical oxygen produced by the ultraviolet photolysis H2O and then degraded; the heat generated by the U-shaped electrodeless lamp (12) during use will be discharged together with the gas after removing formaldehyde through the exhaust fan (1).

8. The method of claim 7, wherein the method further comprises the step of: 8.

1. turning on the microwave lamp for a predetermined time period. The humidity sensor (10) can adjust the water outlet state of the water tank (11) according to the indoor humidity.

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