CN103212289B - A kind of air cleaning unit of catalytic decomposition formaldehyde - Google Patents

Abstract

The invention relates to an air purification device for catalytically decomposing formaldehyde, which can perform filtering, humidification and formaldehyde removal treatment on indoor air, and belongs to the field of air purification. The device is vertically placed indoors, including moving rollers, chassis, air filter structure, fiber membrane purification structure, silent fan, humidification device, connecting transition piece, cylinder body and colored ribbon. The moving rollers are installed on the chassis, and the chassis has a The air inlet, air filter structure, fiber membrane purification structure, silent fan, and humidification device are installed on the cylinder from bottom to top. The belt and cylinder can increase or decrease the number of sections according to the temperature difference. The invention combines air filtration, photocatalytic decomposition of formaldehyde at normal temperature and pressure, indoor selective humidification, and utilizes the chimney effect generated by the upper and lower temperature differences to perform air purification, thereby realizing low energy consumption or even zero energy consumption.

Description

An air purification device for catalytically decomposing formaldehyde

technical field

The invention relates to an air purification device for catalytically decomposing formaldehyde, belonging to the field of air purification.

Background technique

With the improvement of living standards, people have higher and higher requirements for health, and indoor air pollution is a problem that people are very concerned about and needs to be solved urgently. There are thousands of types of indoor pollutants, such as kitchen oil fumes, various cilia floating in the air, formaldehyde and ammonia released from decorative materials, etc., which make people's health worse. Among many pollutants, the harmful effects of formaldehyde on people's bodies are beyond doubt. In addition to its strong adhesive properties, it also has the functions of strengthening the hardness of the board and preventing insects and corrosion. Therefore, it is generally contained in plastics, heat insulation materials and wood-based panel furniture used in ceilings, floors, and wall veneers at home. formaldehyde. Long-term exposure to low-dose formaldehyde can cause chronic respiratory diseases, women's menstrual disorders, pregnancy syndrome, reduced physical fitness of newborns, chromosomal abnormalities, and even nasopharyngeal cancer. In addition, dry air, especially the effect of indoor heating and air conditioning in winter, also seriously affects our health. Maintaining a certain air humidity is also necessary for our health.

At present, air purification technology has developed quite rapidly, and there are many ways to remove formaldehyde. Among them, the activated carbon absorption method is simple and easy to implement, but it is easy to reach saturation, and the treatment of the adsorbed activated carbon will cause secondary pollution; the micro-ionization air purification technology can generate plasma through a micro-ionization generator, and formaldehyde, benzene and other harmful polluting gases through a After a series of chain reactions, formaldehyde and benzene are finally removed to purify the air, but it consumes more energy, and the plasma generated may have adverse effects on human health; using formaldehyde remover, formaldehyde can be removed through chemical reactions, but it will cause secondary Secondary pollution, and this method treats the symptoms but not the root cause, and formaldehyde is easy to be released again. In view of the various shortcomings of the above methods, the present invention proposes a low energy consumption, even zero energy consumption, combined with air impurity filtration, normal temperature and pressure, non-photocatalytic decomposition of formaldehyde, and indoor humidification air purification device.

Contents of the invention

The present invention proposes an air purification device that catalyzes and decomposes formaldehyde, uses the chimney effect to make the air flow automatically from the air inlet to the air outlet, passes through the air filter structure, removes smoke, dust, large particles of impurities, fiber cilia, etc. in the air, and then passes through the fiber The membrane purification structure can effectively remove the harmful substance formaldehyde in the air, and humidify the air when the air is dry. After a period of air circulation treatment, the purpose of purifying the indoor air can be achieved, and a comfortable and healthy environment can be provided for people. .

The invention discloses an air purification device for catalyzing and decomposing formaldehyde, comprising moving rollers, a chassis, an air filter structure, an upper and lower cylinder, a fiber membrane purification structure, a silent fan, a humidifying device, a connecting transition piece, a cylinder and a colored ribbon. Among them, the moving rollers are installed on the chassis, which can make the device move freely and conveniently to different positions indoors, and the chassis is provided with an air inlet. Air filtration structure, fiber membrane purification structure, silent fan, and humidification device constitute the purification assembly, which are installed on the cylinder from bottom to top, and are all installed and clamped at the collars of the two cylinders. When replacing and cleaning, the two sections The cylinder body can be disassembled, which is convenient and quick. The upper and lower cylinders are connected by connecting transition pieces, so that the square shape of the lower cylinder is transformed into a circle, which reduces the area of the cylinder and enhances the aesthetics. The upper cylinder can increase the number of sections arbitrarily according to the indoor conditions to enhance the effect of the chimney and obtain the best purification effect. In addition, the upper cylinder can be tapered so that it can be easily stored after disassembly. A colored silk ribbon is glued on the inner surface of the top of the upper cylinder. When the air in the device flows from bottom to top, the colored ribbon floats and dances, indicating that the device is working, and the air flow rate is displayed according to the vertical degree of the ribbon. ; When there is no air flow, the colored ribbon hangs in the tube due to gravity, which can effectively indicate whether there is a chimney effect.

The present invention is an air purification device for catalyzing and decomposing formaldehyde. The device is placed vertically indoors. Because there is a certain temperature difference between the ground temperature and the top layer temperature, the air enters the air filter device through the air inlet of the chassis, and the dust (such as carbon particles) in the air is removed. , dust), large particles of impurities (such as iron, aluminum and other metal fine dust particles), fiber cilia are filtered out to achieve the first level of air purification. Then the air passes through the fiber membrane purification structure. Under the action of the catalyst on the fiber membrane, the harmful formaldehyde in the air is catalyzed and decomposed, and the decomposition products carbon dioxide and water are taken away with the air flow, which promotes the catalyst to continue to catalyze the decomposition of formaldehyde. Further up is the silent fan, which depends on the indoor air conditions to determine whether to use it. When the indoor temperature difference is large and the air flow in the device shows obvious chimney effect, there is no need to turn on the fan, and the device works naturally, realizing the purpose of air purification Zero energy consumption; but when the temperature difference between the upper and lower sides is not large, the chimney effect is not obvious, and the air flow is weak, so it is necessary to turn on the fan to make the air flow from bottom to top, so that the formaldehyde in the air can contact the catalyst and decompose, and the power of the silent fan is low , the whole device works with low energy consumption.

The invention is an air purification device for catalytically decomposing formaldehyde. The fiber membrane purification structure includes a fiber membrane clamping plate and a formaldehyde catalytic purification fiber membrane. This membrane adopts the formaldehyde catalytic purification fiber developed by our research group through the melt electrospinning method. (Patent publication number: CN102127823A), the fiber is made by directly mixing and spinning MnO ₂ composite catalyst particles with polymer after refinement and surface treatment. The preparation process is simple, the catalytic decomposition rate of formaldehyde is fast, and the removal rate is high. , and the catalytic fiber is easy to weave and shape, with high soaping degree and long service life.

The invention also has the function of air humidification. When the indoor air is relatively dry, the knob can be opened to open the upper water tank, and the purified air flows through the water surface to realize humidification; when the indoor air is humid and does not need humidification, turn the knob to the other side , so that the rotary box and the water tank are closed, and the air flows through the gap without being humidified. At the same time, the water level can be observed, water added or the water tank cleaned by pumping the box.

When the indoor top layer temperature is high and the ground temperature is low, a reverse chimney effect will be produced in the device of the present invention, at this time, air will enter from the upper end and flow out from the bottom end. Formaldehyde in the air can still contact the fiber membrane purification structure and be catalyzed and decomposed, which still has the effect of air purification.

Description of drawings

Fig. 1 is a half-sectional view of an air purification device for catalytically decomposing formaldehyde of the present invention.

Fig. 2 is an axonometric view of an air purification device for catalytically decomposing formaldehyde according to the present invention.

Fig. 3 is a schematic diagram of the purification structure of the fiber membrane of the present invention.

Fig. 4 is a schematic diagram of a humidifying device of the present invention.

Fig. 5 is a front view of the humidifier of the present invention.

In the figure: 1. Moving roller, 2. Chassis, 3. Air filter device, 4. Fiber membrane purification structure, 5. Silent fan, 6. Humidification device, 7. Lower cylinder, 8. Connecting transition piece, 9 Upper cylinder Body, 10. Collar, 11. Color ribbon, 4-1. Fiber membrane holding plate, 4-2. Formaldehyde catalytic purification fiber membrane, 6-1. Water tank, 6-2. Knob, 6-3. Pump Box, 6-4. rotary box, A. air inlet, B. air outlet.

Detailed ways

As shown in Figure 1 and Figure 2, an air purification device for catalytically decomposing formaldehyde mainly consists of a moving roller 1, a chassis 2, an air filter device 3, a fiber membrane purification structure 4, a silent fan 5, a humidifying device 6, and a lower cylinder 7. Connect the transition piece 8, the upper cylinder 9, and the colored ribbon 11 to form. The moving roller 1 is installed on the chassis 2, so that the device can be conveniently and freely moved to different positions indoors, and the chassis 2 is provided with an air inlet A, through which air enters the device. On the bottom of the chassis 2 are: air filter structure 3, fiber membrane purification structure 4, silent fan 5, and humidification device 6, which are installed on the cylinder from bottom to top, and the installation positions are all located at the collar 10 at the boundary of the two cylinders. By disassembling and taking off the two-section cylinder body 7, convenient and quick cleaning and replacement are realized, and the two-section cylinder body is locked by the collar 10. The air filter structure 3 is a metal filter screen, which can be cleaned many times and recycled. The fiber membrane purification structure 4 includes a fiber membrane clamping plate 4-1 and a formaldehyde catalytic purification fiber membrane 4-2, the formaldehyde catalytic purification fiber membrane 4-2 is clamped by the upper and lower fiber membrane clamping plates 4-1, and then the whole Clamped on the body wall of the lower cylinder 7, as shown in Figure 3, only need to loosen the two fiber membrane clamping plates 4-1 during replacement, and replace with a new fiber membrane 4-2, which is simple and convenient. In addition, the formaldehyde catalytic purification fiber membrane 4-2 is directly mixed and spun with the polymer after the MnO ₂ composite catalyst particles are refined and surface treated by the electrospinning method. Further up is the silent fan 5, which is selected to be turned on or off according to the indoor temperature difference. When the upper colored silk ribbon 11 is in a state of floating and flying, it shows that the chimney effect is obvious, and the device is in a natural working state, so the fan may not be turned on; When it hangs on the inner wall of the upper cylinder 9, it means that there is no air flowing upward in the device. At this time, the fan can be turned on to make the lower air flow from bottom to top and be discharged from the air outlet B, so that the device is in a low energy consumption working state. In addition, the humidifying device 6 (Figure 4 and Figure 5) provided by this device includes a water tank 6-1, a knob 6-2, a pumping box 6-3, and a rotary box 6-4, which can selectively humidify the indoor air. When the indoor air is relatively dry, the knob 6-2 of the humidifying device 6 can be rotated to open the rotary box 6-4, and the purified air will flow through the water surface in the water tank 6-1, and the humidified air will flow through the air outlet. Discharge; when the indoor air does not need to be humidified, turn the knob 6-2 so that the rotary box 6-4 and the water tank 6-1 are tightly blocked, and the air will pass through the gap between the water tank 6-1. The humidifying device 6 is a drawer structure made of transparent plastic, which can be observed, cleaned or added at any time. The lower cylinder body 7 is transformed into the upper cylinder body 9 through the connecting transition piece 8, and is converted from a square shape to a circular shape, which reduces the cylinder body area and increases the aesthetics. The upper cylinder 9 can increase the number of sections arbitrarily according to the indoor conditions, thereby enhancing the chimney effect to obtain the best purification effect. In addition, the upper cylinder 9 can be tapered, which is convenient for storage after disassembly. A colored silk ribbon 11 is glued on the inner surface of the top of the upper cylinder body 9. When there is air flow, the colored silk ribbon 11 floats and dances to increase the appearance of the room; Inside, it can effectively show whether there is an upward chimney effect. The air enters through the air inlet A and goes through various links, and then is discharged into the room through the air outlet B, and the air is continuously circulated to continuously purify the air.

Claims (4)

1. An air purification device for catalytically decomposing formaldehyde, comprising moving rollers, a chassis, an air filter device, a fiber membrane purification structure, a silent fan, a humidifying device, a connecting transition piece, a cylinder body and a colored ribbon, and the moving rollers are installed on the chassis , the chassis has an air inlet, and the air filter device, fiber membrane purification structure, silent fan, and humidification device are installed on the cylinder in sequence from bottom to top, and the upper and lower cylinders are connected by connecting transition pieces. Adhesive with colored ribbons, the chimney effect is generated by the temperature difference between the top and bottom of the room. The air flows automatically from the air inlet to the air outlet, and then passes through the air filter device, fiber membrane purification structure and water tank in turn. When the temperature difference is small and the chimney effect is not obvious, a silent fan is used. To drive the air flow, the air humidification device adopts a drawer structure, made of transparent plastic, with a knob inside. When humidification is required, turn the knob to open the upper water tank, and the purified air flows through the water surface to achieve humidification; when the indoor air is humid, no When humidification is required, turn the knob to the other side to close the hanging box and the water tank, allowing air to pass through the gap. 2. A kind of air purification device for catalytically decomposing formaldehyde according to claim 1, characterized in that, the air filter device, fiber membrane purification structure, silent fan, and humidification device are all installed and clamped at the collars of the two cylinders , When replacing and cleaning, just remove the two cylinders, and the cylinders are locked by collars. 3. The air purification device for catalytically decomposing formaldehyde according to claim 1, characterized in that a colored ribbon is fixed on the top inner surface of the upper cylinder, and when air flows upward, the colored ribbon floats and dances ; When there is no air flow, the colored ribbon hangs in the tube due to gravity, effectively indicating the effect of no chimney. 4. A kind of air purification device for catalytically decomposing formaldehyde according to claim 1, characterized in that, when the indoor top layer temperature is high and the ground temperature is low, a reverse chimney effect will be produced in the device, and now the air will enter from the upper end, Flowing out from the bottom, the formaldehyde in the air can still contact the fiber membrane purification structure and be catalyzed and decomposed, which still has the effect of air purification.