RU97810U1 - DEVICE OF PHOTOCATALYTIC DISINFECTANT AND CLEANER OF AIR OF RECYCLED AIR OF INCREASED EFFICIENCY - Google Patents

Abstract

 1. Photocatalytic device for disinfecting and purifying air — a recirculator comprising a housing and a fan installed inside the housing, a photocatalytic unit including a photocatalytic filter in the form of a porous carrier with a photocatalyst, and an ultraviolet lamp as a source of ultraviolet radiation, and equipped with a control unit with a ballast control device, characterized the fact that the control unit for ignition and ensuring the operating mode of the ultraviolet lamp, power the fan and counting time lamp formed with electronic control gear, which is provided with a lamp usage counter and protections emergency lamp operation: idle, short circuit and a rectifying effect in the tube and the housing is further provided with a removable decorative grille made of ABS-plastic. ! 2. The device according to claim 1, characterized in that the porous carrier is made of light-transmitting material. ! 3. The device according to claim 2, characterized in that porous polypropylene is used as the porous light-transmitting material. ! 4. The device according to claim 2, characterized in that a porous glass is used as the porous light-transmitting material. ! 5. The device according to claim 1, characterized in that it is further provided with a replaceable dust filter, which is shared with the photocatalyst carrier. ! 6. The device according to claim 2, characterized in that it is additionally equipped with a replaceable dust filter, which is shared with the carrier of the photocatalyst. ! 7. The device according to claim 5, characterized in that the composition of the dust filter includes an organic or inorganic adsorbent. ! 8. Device �

Description

The utility model relates to the field of photocatalytic disinfection and air purification and can be used in medical and preventive, administrative, public, office, residential premises, in school and preschool institutions where air disinfection and purification is required in the presence of people. Known devices for photocatalytic air purification, characterized by versatility in the destruction of organic and many inorganic pollutants, are widespread and are the most used and promising in comparison with other types of air purifiers.

Known photocatalytic air purifier containing a housing, a fan, an ultraviolet lamp and a photocatalyst on a carrier, which is used as a porous light-transmitting material. Additionally, it can be equipped with a dust filter shared with the photocatalyst carrier (patent No. 8634, B01J 19/10, 1998).

The disadvantages of the known device are the relatively low cleaning speed and inefficient use of light from an ultraviolet lamp for the photooxidation process.

A photocatalytic air purifier is known in which a photocatalyst is applied to glass tubes (WO 02/102497, D01D 53/86, 2002).

However, this known cleaner does not efficiently use UV light for the cleaning process. A photocatalytic device for air purification is known, comprising a housing and a dust filter placed in the housing, a photocatalytic unit, a fan and a catalytic filter installed at the output of the photocatalytic unit along the air flow (patent No. 68353, B01D 53/00, 2007).

But this device also does not differ in sufficient indicators for the effective use of light from an ultraviolet lamp for an efficient cleaning process, which limits its capabilities.

Closest to the claimed solution is a known adsorption - photocatalytic device for purifying air from volatile pollutants, comprising a housing and a fan installed inside the housing, a photocatalytic unit including a photocatalytic filter in the form of a porous carrier with a photocatalyst and an ultraviolet lamp as a source of ultraviolet radiation, and equipped with a control unit with ballast (PRA). This device is equipped with a dust filter with the possible inclusion in its composition of an organic or inorganic adsorbent (patent RU 33035, B01J 20/00, F24F 3/16, 2003). Taken as a prototype.

However, the insufficiently high efficiency of the cleaning process, which depends on the efficiency of the photocatalytic filter, the increased energy intensity and the insufficient ability to disinfect the device with respect to modern requirements limit its use. The main disadvantage of the known device is the implementation of the control unit with an electromagnetic ballast. When the mains voltage fluctuates, the ultraviolet lamp flickers (stroboscopic effect), which has an extremely negative effect on the photooxidation processes, since the photocatalytic filter's functioning efficiency is associated with the efficient use of the light from the lamps that irradiate the photocatalyst. When the output voltage fluctuations out of the range of 198-242 V, the electromagnetic ballast used to power the ultraviolet lamp fails, which leads to a device failure. With a "false start", the lamp flashes and blinks for a certain period of time from the moment of ignition, which causes the starter to re-operate. When the starter is turned on again, the glow elements of the lamp overheat and quickly fail, dramatically reducing the life of the ultraviolet lamp. In addition, when heating an electromagnetic ballast as a result of losses at its relatively high resistive resistance, energy costs increase. Also, disinfection of the outer surface with a 3% solution of hydrogen peroxide is not always effective, which meets the requirements of modern requirements.

Thus, the problem of further improvement of photocatalytic devices for air purification is relevant and in demand.

The objective of the utility model is to create a photocatalytic disinfecting device and an air purifier — an increased efficiency recirculator, which provides the opportunity to accelerate the photooxidation process, reduce energy consumption, increase the service life of an ultraviolet lamp, and provide protection from emergency lamp operation by running a device control unit with an electronic ballast (electronic ballast) while increasing the infectious safety of the device by performing a removable decorative lattice made of a specific material.

The technical result achieved is to increase the efficiency of the photooxidation process, which is manifested in increasing the service life of the ultraviolet lamp, reducing energy consumption, providing protection against emergency lamp operation, and also expanding the possibility of disinfection of the device. The essence of the utility model is that in the device of the photocatalytic disinfectant and air purifier — a recirculator containing a housing and a fan installed inside the housing, a photocatalytic unit including a photocatalytic filter in the form of a porous carrier with a photocatalyst and an ultraviolet lamp as a source of ultraviolet radiation, and equipped with a control unit with a ballast, the feature is that the control unit for ignition and ensure the operating mode of ultraviolet The lamp, fan power and lamp hour counting is made with an electronic ballast, which is equipped with a lamp hour counter and protection from emergency lamp operation: idle, short circuit and rectifier effect in the lamp, and the housing is additionally equipped with a removable decorative grill made of ABS plastic. The porous carrier is preferably made of light-transmitting material, which can be used, for example, porous polypropylene, porous glass. The device may be further provided with a replaceable dust filter that is shared with the photocatalyst carrier. The composition of the dust filter preferably includes an organic or inorganic adsorbent. Also, the device may further comprise at least one fan.

The inventive combination of essential features allows to obtain the specified technical result.

Using electronic ballasts allows you to reduce the power consumption of the device and increase the lamp life, as it has a sparing mode of operation and start-up compared to electromagnetic ballasts. Increasing the photocatalyst illumination with ultraviolet radiation can also significantly reduce energy consumption while increasing productivity.

Therefore, despite the fact that electronic ballasts are quite expensive, the initial costs are offset by their high cost-effectiveness. In addition, the use of electronic ballasts made it possible to update the device’s operation control unit, which, in turn, made it possible to change the order in which the device was switched on, switch operation modes and control the operation of the device, use a new key switch instead of a network switch, which also increases the overall performance devices.

The use of a porous light-transmitting material, such as, for example, porous polypropylene, porous glass, can significantly increase the oxidation rate due to the distribution of light over a large surface area of the photocatalyst. The use of a removable grill expands the possibilities of disinfection, and the implementation of a removable grill of ABS plastic allows disinfection with a 3% solution of hydrogen peroxide and a 0.5% solution of detergent.

Thus, the inventive device can significantly increase the efficiency of photocatalytic air purification and carry out effective disinfection of the device.

Figure 1 shows the device photocatalytic disinfectant and air purifier - recirculator increased efficiency, General view; figure 2 presents a diagram of the air circulation in a device with a dust filter; figure 3 presents the device without a dust filter; figure 4 presents a side view of the device; figure 5 is a graph of the photo-oxidation of acetone by a device with an electromagnetic ballast; Fig.6 graph of the photooxidation of acetone device with electronic ballasts.

The device comprises a housing 1 with a removable grill 2 and one or more fans 3 installed inside the housing 1, a photocatalytic unit 4, including a photocatalytic filter 5 and an ultraviolet lamp 6 as a source of ultraviolet radiation, as well as a control unit 7, with an electronic ballast (not shown). In particular, you can use the model of electronic ballasts L ~ 220-1 × 24-2201-25 of JSC "ENEF" (www.enef.by). The electronic ballast is designed to ignite and ensure the operating mode of the ultraviolet lamp 6, power the fans 3 and calculate the operating time of the lamp 6 and is equipped with a counter (not shown) of the operating hours of the lamp 6 and protection against emergency operation of the lamp 6: idling, short circuit and rectifying effect in lamp 6. The device uses an ultraviolet lamp 6, in particular, a compact fluorescent lamp PL-L 24W "PHILIPS", CLEO-15W or CLEO-36W. The removable decorative grill 2 is made of ABS plastic. Fan 3 circulates the air flow. The photocatalytic filter 5 is a porous carrier (not indicated) with a photocatalyst (not specified). The porous carrier is made of light-transmitting material, for example, porous polypropylene, porous glass. Additionally, a dust filter 8 can be installed inside the housing 1, for example, a dust filter of the HEPA class EURO 5, which is shared with the photocatalyst carrier. The composition of the dust filter 8 preferably includes an organic or inorganic adsorbent, for example, a substance for which the heat of adsorption of organic compounds with a molecular weight of up to 100 a.u. is in the range from 4 kcal / mol to 12 kcal / mol, in particular, synthetic zeolite ZSM. The control unit 7 is preferably made with a key switch.

The device operates as follows.

After connecting the device using the plug of the power cord 9 to the 220 V power supply, a long beep sounds, and the device goes into “Standby mode” - the indicator light 10 blinks green for subsequent start-up of the device through the control unit 7. After starting the device through the electronic ballast of the control unit 7 it goes into operating mode (primary and secondary), while the indicator light 10 lights up in green.

The cleaned air is sucked into the photocatalytic unit 4 and the fan 3 is thrown out. If necessary, an interchangeable dust filter 8 is additionally installed and the air to be cleaned is sucked into the photocatalytic unit 4 through the dust filter 8, which delays suspended particles, and, in addition, stretches in time a volley emission of pollutant. In this case, the pollutant gets onto the photocatalytic block 4 more than 20 times diluted and intermediate products are not observed at the outlet of the photocatalytic block 4 during the oxidation of organic molecules.

The following are examples of studies that explain the essence of a utility model.

Example 1. In an enclosed volume of 90 l of RNOTOSAT-T (a device for testing the performance of a photocatalytic air purifier developed at the GK Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences), an adsorption-photocatalytic device for purifying air from volatile pollutants with electromagnetic PRA. Then, especially pure acetone with a volume of 40-50 μl is sprayed into the chamber at t = 30 ° C through a special hole, which is 120-140 times the maximum permissible concentration of acetone in the living room. The device turns on and the acetone photooxidation reaction begins. The graph (figure 5) shows the rate of decrease in the concentration of acetone during its decomposition by the device. The rate of decrease in acetone concentration is 0.35 μl per minute. At the same time, the power consumption of the device is 21 VA.

Example 2. In a closed volume of 90 l of RNOTOSAT-T, a photocatalytic device for disinfection and purification of air is placed - a recirculator with electronic electronic ballasts.

Electronic ballasts, thanks to automatic stabilization of the current strength, regardless of fluctuations in the mains voltage and a switching frequency of tens of kHz, ensure a stable light flux and the absence of lamp flicker.

The above factors (stable luminous flux and the absence of flickering of the lamp) are the main factors for increasing the rate of photooxidation.

Then, especially pure acetone with a volume of 40-50 μl is injected into the chamber at t = 30 C through a special hole, which is 120-140 times the maximum permissible concentration of acetone in the living room. The device turns on and the acetone photooxidation reaction begins. The graph (Fig.6) shows the rate of decrease in acetone concentration when it is decomposed by the device. The rate of decrease in acetone concentration is 1.03 μl per minute. At the same time, the power consumption of the device is 15.6 VA.

As can be seen from the above examples, the implementation of the photocatalytic disinfectant device and air purifier - recirculator with electronic ballasts increases the rate of photooxidation by almost 3 times while reducing power consumption by an average of 35%.

Thus, the proposed device photocatalytic disinfectant and air purifier - recirculator with electronic ballasts has the following advantages:

- the process of photooxidation of organic, some inorganic molecules and pathogenic microorganisms increases by 3 times, thereby significantly accelerating the processes of air disinfection;

- reduced power consumption by at least 35%;

- the range of input voltage fluctuations is expanding;

- by increasing the lamp life increases the resource of the device itself;

- the device provides protection against emergency operation.

The proposed utility model can be used both in existing devices and in newly developed ones.

Claims (9)

1. Photocatalytic device for disinfecting and purifying air — a recirculator comprising a housing and a fan installed inside the housing, a photocatalytic unit including a photocatalytic filter in the form of a porous carrier with a photocatalyst, and an ultraviolet lamp as a source of ultraviolet radiation, and equipped with a control unit with a ballast control device, characterized the fact that the control unit for ignition and ensuring the operating mode of the ultraviolet lamp, power the fan and counting time lamp formed with electronic control gear, which is provided with a lamp usage counter and protections emergency lamp operation: idle, short circuit and a rectifying effect in the tube and the housing is further provided with a removable decorative grille made of ABS-plastic. 2. The device according to claim 1, characterized in that the porous carrier is made of light-transmitting material. 3. The device according to claim 2, characterized in that porous polypropylene is used as the porous light-transmitting material. 4. The device according to claim 2, characterized in that a porous glass is used as the porous light-transmitting material. 5. The device according to claim 1, characterized in that it is further provided with a replaceable dust filter, which is shared with the photocatalyst carrier. 6. The device according to claim 2, characterized in that it is additionally equipped with a replaceable dust filter, which is shared with the carrier of the photocatalyst. 7. The device according to claim 5, characterized in that the composition of the dust filter includes an organic or inorganic adsorbent. 8. The device according to claim 6, characterized in that the composition of the dust filter includes an organic or inorganic adsorbent. 9. The device according to any one of claims 1 to 8, characterized in that it further comprises at least one fan.