CN201028711Y - Air Conditioning Purification and Disinfection Device - Google Patents

Abstract

The utility model discloses a purifying sterilization device for air conditioner. A W-shaped filer is arranged in a ventilation tube of the air conditioner, and a sunken spot of the W-shaped filer is provided with an ultraviolet lamp. A multistage assembled building block type narrow gap static electricity field device is arranged above the filter, wherein, the filter comprises three layers including that the middle layer is molecular sieve absorbing medium, and both sides of the middle layer are provided with polypropylene filtering mesh boards. The outmost tow layers are metal sieves. Combining the technologies of static electricity absorption, ultraviolet radiation and a nano photo catalysis, the utility model is capable of absorbing the dust in the air and other harmful gases such as formaldehyde, benzene substance and TVOC, in order to effectively purify the indoor air and airflow of the central air conditioner.

Description

Air Conditioning Purification and Disinfection Device

technical field

The utility model relates to an air purification and disinfection device used in a central air-conditioning ventilation system. This device adopts the composite technology of special narrow-pitch electrostatic field and ultraviolet photocatalysis, which can cooperate with any specification of central air-conditioning, and can effectively solve the pollution problem existing in the central air-conditioning system. Hygienic Standards, providing ideal equipment for further implementing the national "Indoor Air Quality Standards", protecting the indoor environment, and protecting people's health.

Background technique

The central air-conditioning system is likely to become a hotbed for bacteria and other microorganisms to multiply and grow, and there are hidden dangers of infecting various diseases. Experts believe that in buildings equipped with air-conditioning, if the pollution caused by air-conditioning is not solved, then all other purification measures will become ineffective.

China Interior Decoration Association's latest sampling test results of indoor air in Beijing's office spaces show that the rate of harmful substances exceeding the standard is as high as 80.56%. Among them, the air-conditioned buildings have good sealing performance, insufficient fresh air, and air-conditioning itself has become a source of pollution are the main reasons. In July 2006, the Shenzhen Center for Disease Control and Prevention announced the sanitation inspection of air-conditioning systems in some high-end hotels and public places in the city, and the detection rate of Legionella was as high as 75%. In 2004, the Ministry of Health organized a nationwide supervision and inspection of the air-conditioning and ventilation systems in public places. The results showed that only 58 of the 937 public places in more than 60 cities in 30 provinces, municipalities and autonomous regions across the country were qualified, accounting for only 58 of the random inspections. 6.2% of the total.

my country has promulgated the "Technical Specifications for Disinfection", "Hygienic Specifications for Centralized Air-Conditioning and Ventilation Systems in Public Places" and "Indoor Air Quality Standards", which stipulate that newly-built, rebuilt and expanded centralized air-conditioning and ventilation systems in public places must comply with the indoor air quality standards stipulated by the Ministry of Health. Standards (including bacteria) are cleaned and tested, and an air disinfection and purification system is installed.

A relatively mature method to solve the problem of central air-conditioning purification and disinfection in the world is to use high-efficiency filter (HEPA) technology. High-efficiency filters (HEPA) have high filtration efficiency for inhalable particulate matter (PM10) and microbial aerosols such as bacteria, so they are widely used in professional industries such as hospitals, pharmaceuticals, electronics, aerospace, food, etc. "occasion. There are also ventilation systems and fresh air systems that use high-efficiency filters (HEPA) for central air-conditioning in civil buildings. However, due to the high resistance of the high-efficiency filter (HEPA) and the small dust holding capacity, resulting in high energy consumption and high operating costs, it has been fundamentally limited in the application of the civilian market. Atmospheric conditions in most cities in my country are not optimistic, and many public places have a large flow of people. In this case, it is not suitable to use high-efficiency filters (HEPA) in central air-conditioning and ventilation systems. The Ministry of Health's "Hygienic Specifications for Centralized Air Conditioning and Ventilation Systems in Public Places" stipulates that the resistance loss of the purification and disinfection devices used must be less than 50Pa. In this way, the installation of purification and disinfection devices in centralized air-conditioning and ventilation systems in public places and other occasions in my country basically excludes high-efficiency filter (HEPA) technology.

The American Honeywell Company once developed a small unitary electrostatic precipitator that can be used for pipeline purification, and was later widely used in central air-conditioning systems. This electrostatic precipitator adopts a double-zone structure of thin line discharge and parallel plate electrode dust collection, which has a certain removal efficiency for PM10 and bacteria and other microorganisms. In the process of promoting this dual-zone assembled building block narrow-pitch electrostatic field device in the world, it was found that there are defects such as easy disconnection and excessive ozone generation, but so far, the product still has no improvement. According to the relevant regulations of our country, it is forbidden to use this kind of separate electrostatic precipitator in some occasions where it is necessary to focus on the control of microorganisms such as bacteria. Some domestic enterprises use medium-efficiency filters or separate electrostatic precipitators for central air-conditioning and ventilation systems, but the purification and disinfection effects cannot fully meet the requirements of the "Hygienic Specifications for Centralized Air-conditioning and Ventilation Systems in Public Places".

In 2005, the Chinese Patent Gazette disclosed a patent of "combined air purification and sterilization device" with the patent number CN1594999. Sterilization device. The ozone disinfection method adopted by the device is a chemical disinfection method, which is stipulated by the Ministry of Health and cannot be used in dynamic occasions. The wind resistance of the water mist spraying-air-water separation part is obviously greater than 50Pa and this technology belongs to wet purification, which is completely different from the dry purification proposed by the utility model.

In view of the defects of the above-mentioned products and technologies, the utility model adopts a composite purification and disinfection technology integrating electrostatic adsorption, ultraviolet irradiation and nano-photocatalysis, which is a physical method that can continuously purify and disinfect air. The entire device can perfectly meet the various indicators stipulated in the "Hygienic Specifications for Centralized Air Conditioning and Ventilation Systems in Public Places".

Contents of the invention

The purpose of the utility model is to provide an air-conditioning purification and disinfection device integrating electrostatic adsorption, ultraviolet irradiation and nano-photocatalysis, which is used for air purification and disinfection in centralized (central) air-conditioning and ventilation systems.

The utility model adopts the following technical scheme: an air-conditioning purification and disinfection device, a W-shaped filter is arranged in the air-conditioning ventilation duct, an ultraviolet lamp is arranged in the recess of the W-shaped filter, and several stages of assembled building blocks are arranged above the filter with narrow spacing Electrostatic field device. The purpose of setting the filter into a W shape is to enable the filter to be fully and evenly irradiated by the ultraviolet light emitted by the ultraviolet lamp, and the shape of the filter can also be an S shape or other shapes that can be fully irradiated.

In the above technical solution, the filter includes three layers, the middle layer is a molecular sieve adsorption medium, the two sides of the molecular sieve adsorption medium are polypropylene filter screen plates, and the outermost two sides are metal filter screens. The filter is combined with the assembled building block type narrow-pitch electrostatic field device to realize the function of electrostatic filtration, dust removal and sterilization. The filter relies on the mirror image force to intercept the charged particles that escape from the previous stage through the electrostatic field. The mesh diameter of the metal filter screen should be less than or equal to 2mm. The metal filter screen is formed by folding multiple layers of metal foil, which has a large surface area and is conducive to dust collection. Molecular sieves, activated carbon and other adsorption media are used to remove gas pollutants such as formaldehyde, benzene series, TVOC, etc. According to the different needs of the air characteristics of the application, molecular sieves, activated carbon and other adsorption media can be selectively filled.

In order to enable multi-directional reflection of ultraviolet light, the metal filter is wave-shaped. The purpose of adopting the wavy structure is to enable the metal surface of the filter to reflect ultraviolet rays in multiple directions to form concentrated light, so as to strengthen the sterilization and catalytic effects of ultraviolet rays.

The assembled building block type narrow-pitch electrostatic field device includes a discharge electrode, a dust collection electrode and an insulator, the discharge electrode and the dust collection electrode are arranged in parallel at intervals, the two ends of the discharge electrode are connected to the discharge electrode connector, and the lower part of the discharge electrode is serrated. The upper part of the electrode is tubular, the serrated discharge electrode and the dust collection electrode form a discharge area, the tubular discharge electrode and the dust collection electrode form a dust collection area, the two ends of the dust collection electrode are connected to the dust collection electrode connector, the discharge electrode connector and the dust collection electrode The connectors are respectively connected to the insulators. The same pole distance is less than 100 mm, that is, the distance between adjacent discharge electrodes is less than 100 mm, and the distance between adjacent dust collecting electrodes is less than 100 mm.

The insulator is assembled from several insulator units. One side of the insulator unit is provided with a wedge-shaped groove, and the other side is provided with a corresponding matching wedge-shaped flange. The wedge-shaped flange of one insulator unit is embedded in another insulator. inside the wedge-shaped groove of the unit. Each insulator unit is a sub-discharge area and a sub-dust collection area. Several insulator units are assembled to form a large discharge area and dust collection area. The length of the discharge electrode and dust collection electrode is adjustable, and the insulator unit is also It can be assembled according to different shapes and sizes of air conditioners, and it is very convenient to use.

The discharge of the aforementioned narrow-pitch assembled building block type narrow-pitch electrostatic field device is extremely jagged. The serrated discharge electrode has a smaller corona current than a thin wire, and has a better corona discharge effect, and there is no possibility of broken wires. This kind of assembled building block narrow-pitch electrostatic field device can be assembled into any size through the connection between specially designed insulators, which greatly saves the cost of manufacturing equipment. The specially designed insulators are arranged on both sides of the windward side of the device, and will not be polluted by the dusty airflow, thus overcoming the creepage caused by the insulators installed in the middle of the windward side which are easily affected by high humidity or dust particles carried by the airflow or short circuit defects.

The assembled building block narrow-pitch electrostatic field device is a positive corona discharge, and the assembled building block narrow-pitch electrostatic field device is full of high-energy, high-concentration positive ions. Positive ions charge the dust particles and microbial aerosols in the passing airflow and reach saturation. Partially charged dust particles and microbial aerosols are affected by the Coulomb force of the electrostatic field and reach the dust collecting plate. Partially charged microbial particles It will pass through the electrostatic field and be intercepted by the post-stage filter.

The utility model can be installed in the return air section, the air outlet section, the air outlet, the return air outlet, the new air outlet, the fresh air, and the return air mixing section of the central air-conditioning ventilation system, and can also be used in conjunction with the central air-conditioning terminal. The two ends of the air-conditioning purification and disinfection device are connected to the ventilation pipe of the central air-conditioning by shrinking.

During application, the airflow through the central air conditioner enters from the narrow-pitch assembled building block type narrow-pitch electrostatic field device, and the dust particles in the gas, including microbial particles, can quickly charge through the serrated discharge electrodes and tubes and reach saturation, and some charged dust particles Under the action of parallel tubular dust collecting electrodes, it is separated from the air flow and collected on the tubular dust collecting electrodes. Part of the charged dust particles (including microbial particles) pass through the assembled building block type narrow-pitch electrostatic field device, and are intercepted by the mesh metal filter screen of the subsequent stage relying on the image force. The medium filled in the medium frame in the middle of the mesh metal filter can absorb formaldehyde, benzene series, TVOC and other harmful gases in the airflow. The UV lamp is installed in the middle of the W-shaped mesh metal filter. The ultraviolet light can further kill bacteria and other microorganisms in the air, and can work together with the photocatalyst coated on the surface of the mesh metal filter to decompose the intercepted bacteria and their metabolites, debris and other organic pollutants, which are harmful to the air. Harmful gases such as formaldehyde, benzene series and TVOC also have a certain degradation effect.

The utility model has the following advantages:

1. The dual disinfection effect of electrostatic adsorption and ultraviolet circulating air can make the total number of bacteria and fungi at the air outlet of the central air conditioner less than or equal to 500cfu/ ^m3 ; pathogenic microorganisms such as hemolytic streptococcus cannot be detected; inhalable particulate matter (PM10) ≤0.15mg/m3; device resistance ≤050Pa; ozone concentration 0.16mg/m3; purification efficiency: pollutants pass through once ≥50%; high-concentration continuous operation efficiency drops <10%.

2. The ultraviolet light photocatalytic module of the present invention has the functions of further killing and decomposing microorganisms such as bacteria and organic pollutants such as metabolites and fragments produced by microorganisms such as bacteria. The whole device integrates electrostatic adsorption, ultraviolet irradiation, and nano-photocatalysis technology, and can perfectly meet the various indicators stipulated in the "Hygienic Specifications for Centralized Air Conditioning and Ventilation Systems in Public Places". Reasonable structure, simple and compact, low resistance, low energy consumption, high efficiency, easy to use, can be used in conjunction with various central air conditioners without affecting the performance of the central air conditioning ventilation system, and meet the requirements of the Ministry of Health "Central Air Conditioning Ventilation in Public Places" System Hygienic Code requirements.

3. The utility model can continuously operate in 100% high-humidity airflow without affecting its purification and disinfection performance.

4. The utility model can be used in conjunction with any central air conditioner without affecting the operation of the central air conditioner.

Description of drawings

Fig. 1 is the sectional structure schematic diagram of the present utility model;

Fig. 2 is the government view of Fig. 1;

Figure 3 is a schematic diagram of the enlarged structure of the filter.

Code description in the figure

1——Filter 11——Molecular sieve adsorption medium

12——Polypropylene filter plate 13——Metal filter

2——ultraviolet lamp 3——assembled building block type narrow spacing electrostatic field device

4——Contraction 5——Air conditioner ventilation duct

Detailed ways

Below in conjunction with accompanying drawing 1, Fig. 2 and Fig. 3, the utility model is further described: a kind of air-conditioning purification and disinfection device, W-shaped filter 1 is set in the air-conditioning ventilation duct, and ultraviolet lamp 2 is set in the depression of W-shaped filter 1. The filter 1 is provided with a several-stage assembled building block type narrow-pitch electrostatic field device 3 . The purpose of setting the filter 1 into a W shape is to enable the filter 1 to be fully irradiated by the ultraviolet light emitted by the ultraviolet lamp 2. The shape of the filter 1 can also be S-shaped or other shapes that can be fully irradiated. The ultraviolet lamp 2 is arranged In the recess of the W-shaped filter 1, the ultraviolet light is evenly irradiated on the filter 1.

In the above technical solution, the filter 1 includes three layers, the middle layer is a molecular sieve adsorption medium 11, the two sides of the molecular sieve adsorption medium 11 are polypropylene filter screen plates 12, and the outermost two sides are metal filter screens 13. The filter 1 is combined with the assembled block-type narrow-pitch electrostatic field device 2 to realize the function of electrostatic filtration, dust removal and sterilization. The filter 1 relies on the image force to intercept the charged particles that escape from the previous stage through the electrostatic field. The mesh diameter of metal filter screen 13 should be less than or equal to 2 millimeters. The metal filter screen 13 is formed by folding multiple layers of metal foil, and has a larger surface area, which is beneficial to dust collection. Molecular sieves, activated carbon and other adsorption media are used to remove gas pollutants such as formaldehyde, benzene series, TVOC, etc. According to the different needs of the air characteristics of the application, molecular sieves, activated carbon and other adsorption media can be selectively filled.

In order to enable multidirectional reflection of ultraviolet light, the metal filter screen 13 is wave-shaped. The purpose of adopting the wavy structure is to enable the metal surface of the filter 1 to reflect ultraviolet rays in multiple directions to form concentrated light, so as to enhance the sterilization and catalytic effects of ultraviolet rays.

The assembled building block type narrow-pitch electrostatic field device 3 includes a discharge electrode, a dust collection pole and an insulator, the discharge electrode and the dust collection pole are arranged in parallel at intervals, the two ends of the discharge electrode are connected to the discharge electrode connector, and the bottom of the discharge electrode is serrated. The upper part of the discharge electrode is tubular, the serrated discharge electrode and the dust collection electrode form a discharge area, the tubular discharge electrode and the dust collection electrode form a dust collection area, the two ends of the dust collection electrode are connected to the dust collection electrode connector, the discharge electrode connector and the dust collection The pole connectors are respectively connected to the insulators. The same pole distance is less than 100 mm, that is, the distance between adjacent discharge electrodes is less than 100 mm, and the distance between adjacent dust collecting electrodes is less than 100 mm.

The insulator is assembled from several insulator units. One side of the insulator unit is provided with a wedge-shaped groove, and the other side is provided with a corresponding matching wedge-shaped flange. The wedge-shaped flange of one insulator unit is embedded in another insulator. inside the wedge-shaped groove of the unit. Each insulator unit is a sub-discharge area and a sub-dust collection area. Several insulator units are assembled to form a large discharge area and dust collection area. The length of the discharge electrode and dust collection electrode is adjustable, and the insulator unit is also It can be assembled according to different shapes and sizes of air conditioners, and it is very convenient to use.

The discharge of the aforementioned narrow-pitch assembled building block type narrow-pitch electrostatic field device 3 is extremely zigzag. The serrated discharge electrode has a smaller corona current than a thin wire, and has a better corona discharge effect, and there is no possibility of broken wires. This kind of assembled building block narrow-pitch electrostatic field device can be assembled into any size through the connection between specially designed insulators, which greatly saves the cost of manufacturing equipment. The specially designed insulators are arranged on both sides of the windward side of the device, and will not be polluted by the dusty airflow, thus overcoming the creepage caused by the insulators installed in the middle of the windward side which are easily affected by high humidity or dust particles carried by the airflow or short circuit defects.

The assembled block-type narrow-pitch electrostatic field device 3 is a positive corona discharge, and the assembled block-type narrow-pitch electrostatic field device 2 is full of high-energy, high-concentration positive ions. Positive ions charge the dust particles and microbial aerosols in the passing airflow and reach saturation. Partially charged dust particles and microbial aerosols are affected by the Coulomb force of the electrostatic field and reach the dust collecting plate. Partially charged microbial particles It will pass through the electrostatic field and be intercepted by the post-stage filter.

The utility model can be installed in the return air section, the air outlet section, the air outlet, the return air outlet, the new air outlet, the fresh air, and the return air mixing section of the central air-conditioning ventilation system, and can also be used in conjunction with the central air-conditioning terminal. The two ends of the air-conditioning purification and disinfection device 2 are connected to the central air-conditioning ventilation duct 5 through shrinkage connection 4 .

During application, the airflow through the central air conditioner enters from the narrow-pitch assembled building block type narrow-pitch electrostatic field device 3 shown in Figure 1, and the dust particles in the gas, including microbial particles, can be quickly charged through the serrated discharge electrodes and tubes and reach Saturated electricity, some charged dust particles are separated from the air flow under the action of parallel tubular dust collection electrodes and collected on the tubular dust collection electrodes. Part of the charged dust particles (including microbial particles) pass through the assembled building block type narrow-pitch electrostatic field device, and are intercepted by the mesh metal filter screen of the subsequent stage relying on the image force. The medium filled in the medium frame in the middle of the mesh metal filter can absorb formaldehyde, benzene series, TVOC and other harmful gases in the airflow. The UV lamp is installed in the middle of the W-shaped mesh metal filter. The ultraviolet light can further kill bacteria and other microorganisms in the air, and can work together with the photocatalyst coated on the surface of the mesh metal filter to decompose the intercepted bacteria and their metabolites, debris and other organic pollutants, which are harmful to the air. Harmful gases such as formaldehyde, benzene series and TVOC also have a certain degradation effect.

Claims (4)

1. An air-conditioning purification and disinfection device is characterized in that: a W-shaped filter is set in the air-conditioning ventilation duct, an ultraviolet lamp is set in the recess of the W-shaped filter, and several stages of assembled building block formula narrow-spacing electrostatic field is set above the filter device. 2. The air-conditioning purification and disinfection device according to claim 1, characterized in that: the filter comprises three layers, the middle layer is a molecular sieve adsorption medium, the two sides are polypropylene filter plates, and the outermost two sides are metal filter plates. net. 3. The air-conditioning purification and disinfection device according to claim 2, characterized in that: the metal filter is wave-shaped. 4. The air-conditioning purification and disinfection device according to claim 1, characterized in that: the assembled building block type narrow-pitch electrostatic field device includes a discharge electrode, a dust collection pole and an insulator, and the discharge electrode and the dust collection pole are arranged in parallel at intervals. The two ends of the electrode are connected to the discharge electrode connector. The lower part of the discharge electrode is serrated, and the upper part of the discharge electrode is tubular. The two ends of the pole are connected to the dust collecting pole connecting piece, and the discharge electrode connecting piece and the dust collecting pole connecting piece are respectively connected to the insulator.

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