Air handling unit capable of washing electronic static electricity

Abstract

The utility model discloses an air handling unit capable of washing electronic static electricity, which comprises a box body and a base, and an air inlet pipeline, an air outlet pipeline, a centrifugal fan and a motor are arranged in the box body; a plate type primary filter and an electronic electrostatic filter are sequentially arranged in an air inlet pipe of the centrifugal fan from front to back; an electric field is generated after the electronic electrostatic filter is electrified, so that tiny dust particles in the range of the electric field carry charges and are adsorbed by dust collection electrodes of the electronic electrostatic filter under the action of electric field force; a spraying device for spraying and washing the dust collection electrode is arranged above the electronic electrostatic filter; the rear side of the electronic electrostatic filter is provided with a water blocking curtain used for blocking sprayed water of the spraying device from entering the centrifugal fan; and a water collecting device for collecting sewage flowing down after spraying and washing is arranged below the electronic electrostatic filter. According to the utility model, the washable electronic electrostatic filter is arranged, so that the filter can be directly cleaned without being disassembled under the condition that the filtering requirement is met.

Description

Technical Field

[0001] The utility model relates to the field of air purification, in particular to an air processing unit capable of washing electronic static electricity. Background Art

[0002] Currently, air handling units (AHUs) used in rail transit and other facilities require purification of airborne pollutants such as dust. Newly constructed buildings contain a large amount of fine dust particles. During the initial operation of an AHU, this high volume of dust passing through the filters can easily cause clogging of the primary and secondary filters, requiring frequent filter replacement. Therefore, most AHUs incorporate electronic electrostatic filters to filter fine dust early in the building's operation. After cleaning, this reduces the frequency of filter replacements and saves costs. However, conventional electronic electrostatic filters require removal from the AHU for cleaning, which is cumbersome. Summary of the Invention

[0003] The utility model provides an air handling unit capable of washing electronic static electricity in order to solve the technical problems existing in the known technology.

[0004] The technical solution adopted by the present invention to solve the technical problems existing in the known technology is:

[0005] An air handling unit with washable electronic static electricity comprises a box body and a base fixed to each other, wherein an air inlet duct, an air outlet duct, a centrifugal fan and a motor are arranged in the box body; the centrifugal fan is driven by the motor to operate, so that air is input from the air inlet duct and output from the air outlet duct; a plate-type primary filter and an electronic electrostatic filter are arranged in sequence from front to back in the air inlet duct of the centrifugal fan; when the electronic electrostatic filter is energized, an electric field is generated, so that dust particles within the electric field range carry electric charges and are adsorbed by the dust collecting electrodes of the electronic electrostatic filter under the action of the electric field force; a spray device for spraying and flushing the dust collecting electrodes is provided above the electronic electrostatic filter; a water curtain for blocking the spray water of the spray device from entering the centrifugal fan is provided on the rear side of the electronic electrostatic filter; a water collection device for collecting sewage flowing down after spraying and flushing is provided below the electronic electrostatic filter.

[0006] Furthermore, the water curtain is a lifting roller curtain or a lifting folding water curtain; when the centrifugal fan is running, the water curtain rises to the top of the air inlet pipe, and when the centrifugal fan stops and the dust collecting electrode is sprayed and flushed, the water curtain drops to the bottom of the air inlet pipe.

[0007] Furthermore, the water curtain is a 90° rotating water curtain; when the centrifugal fan is running, the surface of the rotating water curtain is parallel to the axis of the air inlet pipe of the centrifugal fan; when the centrifugal fan is stopped and the dust collecting electrode is sprayed and flushed, the surface of the rotating water curtain is perpendicular to the axis of the air inlet pipe of the centrifugal fan.

[0008] Furthermore, the water collecting device is a box-type water collector or a funnel-shaped water collector with a drainage hole at the bottom and an opening at the top.

[0009] Furthermore, the plate-type primary filter includes a plurality of filter units and a mounting frame arranged in sequence. The filter unit includes a filter plate. The mounting frame is provided with a slide groove. The filter plate is detachably inserted into the slide groove.

[0010] Furthermore, a heat exchange device is provided in the air inlet duct, and the heat exchange device includes a coil; by circulating cold water or hot water in the coil, the air flowing through the air inlet duct is cooled, dehumidified or heated accordingly.

[0011] Furthermore, the heat exchange device is located at the rear side of the electronic electrostatic filter and above the water collecting device; when cold water circulates in the coil, the water collecting device collects condensed water generated by the heat exchange device.

[0012] Furthermore, a silencer for reducing the noise of the air handling unit is provided in the box. The silencer is made of galvanized perforated plate folded and welded, and is filled with silencer cotton inside.

[0013] Furthermore, the box body is enclosed by a plurality of layers of panels, which are, from the outside to the inside, a color-coated steel plate layer, a polyurethane foam layer, and a galvanized steel plate layer.

[0014] Furthermore, a guide rail is provided on the base, and the mounting bases of the fan and the motor are slidably fitted with the guide rail.

[0015] The advantages and positive effects of the present invention are as follows: air enters the air handling unit from the air inlet duct, passes through a plate-type primary filter to remove fine dust particles, and then passes through an electronic electrostatic filter to remove small dust particles. A water curtain is provided behind the electronic electrostatic filter to prevent water from the spray device from entering the centrifugal fan. The electronic electrostatic filter can be cleaned directly in the air handling unit, saving costs. The water curtain acts as a water barrier. A muffler is provided to reduce noise. The base can be provided with guide rails, and the mounting bases of the fan and motor can slide along the guide rails. The fan and motor can be flexibly moved horizontally along the guide rails and then secured to the base after the appropriate position is determined. A heat exchange device is also provided within the air inlet duct. The heat exchange device includes a coil. In summer, cold water flows through the coils of the heat exchange device, and the filtered air passes between the coils for cooling and dehumidification. In winter, hot water flows through the cold coils, and the filtered fresh air passes through the coils for heating before being delivered. The air handling unit (AHU) coordinates the air conditioning coil to regulate temperature and humidity, and finally, the silencer reduces noise, creating comfortable conditions within the building. A washable electronic electrostatic filter allows for direct cleaning without disassembly, provided that filtration requirements are met. This AHU is widely used in rail transit applications requiring purification, significantly reducing maintenance costs for buildings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a main view of an air handling unit capable of washing electronic static electricity according to the utility model.

[0017] Figure 2 It is a top view of an air handling unit capable of washing electronic static electricity according to the utility model.

[0018] In the figure: 1. Plate-type primary filter; 2. Electronic electrostatic filter; 3. Coil; 4. Water curtain; 5. Centrifugal fan; 6. Muffler; 7-1. Cassette water collector A; 7-2. Cassette water collector B; 8. Base; 9. Motor; 10. Pulley; 11. Belt; 12. Box; 13. Mounting base of centrifugal fan. DETAILED DESCRIPTION

[0019] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0020] In the description of the present invention, the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention. The terms "connected" and "connection" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components; they can also be electrical connections or signal transmissions. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0021] See Figures 1 to 2, an air handling unit with washable electronic static electricity, comprising a box body 12 and a base 8 fixed to each other, an air inlet duct, an air outlet duct, a centrifugal fan 5 and a motor 9 are arranged in the box body 12; the centrifugal fan 5 is driven by the motor 9 to operate, so that air is input from the air inlet duct and output from the air outlet duct; a plate-type primary filter 1 and an electronic electrostatic filter 2 are arranged in sequence from front to back in the air inlet duct of the centrifugal fan 5; when the electronic electrostatic filter 2 is energized, an electric field is generated, so that the dust particles within the electric field range carry an electric charge, and are adsorbed by the dust collecting electrode of the electronic electrostatic filter 2 under the action of the electric field force; a spray device for spraying and flushing the dust collecting electrode is provided above the electronic electrostatic filter 2; a water retaining curtain 4 for blocking the spray water of the spray device from entering the centrifugal fan 5 is provided on the rear side of the electronic electrostatic filter 2; a water collection device for collecting sewage flowing down after spraying and flushing is provided below the electronic electrostatic filter 2.

[0022] The spraying device may include a water pipe and a nozzle; the nozzle is installed on the water pipe, and the water outlet of the nozzle is directed toward the dust collecting electrode surface of the electronic electrostatic filter 2. A nozzle with an adjustable water outlet direction can be used.

[0023] The cross section of the air inlet duct of the centrifugal fan 5 may be square.

[0024] Preferably, the water curtain 4 can be a lifting roller curtain type water curtain 4 or a lifting folding water curtain 4; when the centrifugal fan 5 is running, the water curtain 4 can rise to the top of the air inlet pipe, and when the centrifugal fan 5 stops and the dust collecting electrode is sprayed and flushed, the water curtain 4 can drop to the bottom of the air inlet pipe.

[0025] Preferably, the water retaining curtain 4 can be a 90° rotating water retaining curtain 4; when the centrifugal fan 5 is running, the surface of the rotating water retaining curtain 4 can be parallel to the axis of the air inlet pipe of the centrifugal fan 5; when the centrifugal fan 5 is stopped and the dust collecting electrode is sprayed and flushed, the surface of the rotating water retaining curtain 4 can be perpendicular to the axis of the air inlet pipe of the centrifugal fan 5.

[0026] Preferably, the water collecting device may be a box-type water collector or a funnel-shaped water collector with a drainage hole at the bottom and an opening at the top.

[0027] Preferably, the plate-type primary filter 1 may include a plurality of filter units and a mounting frame arranged in sequence, the filter unit includes a filter screen plate, and the mounting frame may be provided with a slide groove; the filter screen plate is detachably inserted into the slide groove.

[0028] Preferably, a heat exchange device may be provided in the air inlet duct, and the heat exchange device may include a coil 3; by circulating cold water or hot water in the coil 3, the air flowing through the air inlet duct can be cooled, dehumidified or heated accordingly.

[0029] Preferably, the heat exchange device can be located at the rear side of the electronic electrostatic filter 2 and above the water collection device; when cold water circulates in the coil 3, the water collection device can collect condensed water generated by the heat exchange device.

[0030] Preferably, a muffler 6 for reducing the noise of the air handling unit may be further provided in the box body 12. The muffler 6 may be formed by folding and welding a galvanized perforated plate, and may be filled with sound-absorbing cotton inside.

[0031] The muffler 6 should be placed as close to the noise source as possible. When the duct is connected to the centrifugal fan 5, the muffler should be installed at the centrifugal fan's air inlet or outlet. For smaller duct diameters, it can be installed on the duct or near the centrifugal fan's air inlet or outlet. For larger duct diameters (greater than DN100), the muffler should be installed 200mm to 300mm above the centrifugal fan's air inlet or outlet.

[0032] Preferably, the box body 12 can be enclosed by multiple layers of panels, which can be a color-coated steel plate layer, a polyurethane foam layer, and a galvanized steel plate layer from the outside to the inside.

[0033] Preferably, a guide rail may be provided on the base 8, and the mounting bases of the centrifugal fan 5 and the motor 9 may be slidably engaged with the guide rail, so that the centrifugal fan 5 and the motor 9 may be flexibly translated along the guide rail, and then the mounting bases of the centrifugal fan 5 and the motor 9 may be fixed to the base 8 after determining the appropriate position; a forklift insertion slot may be provided on the base 8, and a lifting lug for lifting may be provided on the top of the box body 12.

[0034] The present utility model also provides an air treatment method using the water-washable electronic electrostatics of the air handling unit mentioned above, comprising the following method steps: when the air handling unit is working, the water retaining curtain 4 is in a state of not hindering the air intake, the motor 9 is started, the air passes through the plate-type primary filter 1 to filter out the dust particles with larger particle sizes, and then passes through the electronic electrostatic filter 2 to filter out the dust particles with smaller particle sizes, and the treated air is output by the centrifugal fan 5; when the air handling unit is stopped, the water retaining curtain 4 is in a state of blocking the water output of the spray device from entering the rear air inlet duct, the spray device is turned on to spray and flush the dust collecting electrode; the sewage after the spraying and flushing is collected and discharged by the water collection device.

[0035] The structure and working principle of the present invention are further explained below with reference to a preferred embodiment of the present invention:

[0036] As shown in the figure, a new air handling unit with washable electronic electrostatic filter includes: a plate primary filter 1, an electronic electrostatic filter 2, a coil 3, a water retaining curtain 4, a centrifugal fan 5, a silencer 6, a box water collector A7-1, a box water collector B7-2, a base 8, a three-phase asynchronous motor 9, a pulley 10, a belt 11, a box body 12, and a mounting base 13 for the centrifugal fan.

[0037] The plate-type primary filter 1 is located on the air inlet side of the air handling unit and is fixed by a sheet metal support. A single filter is made of chemical fiber with an aluminum alloy frame. Filters of the same height are connected by buckles and can be pulled out on the slide for easy maintenance.

[0038] The electronic electrostatic filter 2 is installed behind the primary filter and is fixed by a galvanized mounting frame and a galvanized supporting sheet metal. When powered on, it generates an electric field, so that the dust particles within the electric field range carry charges and are adsorbed by the dust collecting electrode under the action of the electric field force. Its filtering effect is equivalent to that of a medium-efficiency glass fiber filter, and there is a retractable water curtain 4 behind the electrostatic filter. When the filter is dirty and clogged, the water curtain 4 can be lowered and directly flushed with water.

[0039] Coil 3 is a copper tube and aluminum foil coil. Different circuit structures and fin numbers are selected according to the required cooling and heating capacity. When passing cold water or hot water, it can cool, dehumidify or heat the air.

[0040] The water curtain 4 is made of aluminum alloy and is located on the rear side of the coil 3. It blocks the condensed water generated by the cold water flowing through the coil 3 and the sewage flowing down from the electronic electrostatic filter 2 from flowing toward the centrifugal fan 5, so that the condensed water and sewage flow into the box-type water collector below the coil 3.

[0041] Two stainless steel cassette water collectors are located below the electronic electrostatic filter 2 and coil 3, respectively. Cassette water collector A7-1 is located below the electronic electrostatic filter 2, and cassette water collector B7-2 is located below the coil 3. Water cleaned by the electronic electrostatic filter 2 and condensed water from cooling and dehumidifying coil 3 in summer can flow directly into the stainless steel cassette water collectors and out of the air handling unit through the drain ports on their bottoms. Water cleaned by the electronic electrostatic filter 2 can flow directly into cassette water collector A7-1, and condensed water from cooling and dehumidifying coil 3 in summer can flow directly into cassette water collector B7-2.

[0042] The centrifugal fan 5 is a centrifugal fan with a volute; the motor 9 is a three-phase asynchronous motor. The rated power of the centrifugal fan 5 and the motor 9 is calculated based on the air volume and the total static pressure.

[0043] The silencer 6 is formed by folding and welding a galvanized perforated plate, and is filled with silencer cotton inside to reduce noise.

[0044] The enclosure 12 is constructed from a multilayer panel consisting of, from the outside in, a white painted steel layer, a polyurethane foam layer, and a galvanized steel layer. The white painted steel layer serves as the exterior, while the galvanized steel layer serves as the interior. The interlayer between the white painted steel layer and the galvanized steel layer is filled with a polyurethane foam layer formed by integrally foaming polyurethane. The multilayer panel offers the advantages of high strength, resistance to deformation, excellent cold bridge prevention, and low air leakage.

[0045] A pulley 10 is respectively sleeved on the output shaft of the motor 9 and the input shaft of the centrifugal fan 5. The outer surface of the pulley 10 has a groove, and a belt 11 is sleeved in the groove of the pulley 10. The number of belts 11 can be the same as the number of grooves. The motor 9 drives the centrifugal fan 5 to operate through the belt 11; the belt 11 is a dust-free belt made of rubber. The length of the belt 11 is calculated based on the center distance of the pulleys 10 respectively sleeved on the output shaft of the motor 9 and the input shaft of the centrifugal fan 5 and the outer diameter of the pulley 10.

[0046] The centrifugal fan mounting base 13 is made of channel steel, providing sufficient load-bearing support for the centrifugal fan 5 and motor 9. The base 8 is equipped with sliding guide rails, onto which the centrifugal fan 5 and motor 9 mounting bases are mounted. The base 8 is galvanized, and the housing 12 is secured to the base 8 with bolts at the bottom. The base 8 has forklift slots for easy handling by forklift, and includes lifting lugs for ceiling mounting.

[0047] When the air handling unit is operating, the three-phase asynchronous motor starts. Air passes through plate-type primary filter 1 to remove larger dust particles, and then through electronic electrostatic filter 2 to remove smaller dust particles. During summer operation, the water valve of coil 3 is activated to introduce cold water. The air passes through coil 3, cooling and dehumidifying it to meet the required room temperature, humidity, and cleanliness. Finally, it passes through muffler 6 for noise reduction before being output as clean air. During winter operation, coil 3 heats the room and reduces relative humidity. The three-phase asynchronous motor and centrifugal fan 5 are connected via belt 11 and pulley 10. Air passes through plate-type primary filter 1, electronic electrostatic filter 2, and coil 3 in sequence. The treated air is then delivered by centrifugal fan 5 to muffler 6 for distribution. The housing 12 seals and insulates the air handling unit.

[0048] The above-mentioned plate-type primary filter 1, electronic electrostatic filter 2, spray device, coil 3, water curtain 4, centrifugal fan 5, silencer 6, box-type water collector, base 8, three-phase asynchronous motor 9, pulley 10, belt 11, box 12, and centrifugal fan mounting base 13 can all adopt applicable parts, devices and structures in the existing technology; or adopt parts, devices and structures in the existing technology and construct them using conventional technical means.

[0049] The above embodiments are only used to illustrate the technical ideas and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. The patent scope of the present invention cannot be limited by these embodiments alone. That is, any equivalent changes or modifications made to the spirit disclosed by the present invention still fall within the patent scope of the present invention.

Claims

1. An air handling unit with washable electronic static electricity, comprising a housing and a base, wherein an air inlet duct, an air outlet duct, a centrifugal fan and a motor are arranged in the housing; the centrifugal fan is driven by the motor to operate, so that air is input from the air inlet duct and output from the air outlet duct; characterized in that: A plate-type primary filter and an electronic electrostatic filter are arranged in sequence from front to back in the air inlet duct of the centrifugal fan; when the electronic electrostatic filter is energized, an electric field is generated, so that the dust particles within the electric field range carry an electric charge and are adsorbed by the dust collecting electrodes of the electronic electrostatic filter under the action of the electric field force; a spray device for spraying and flushing the dust collecting electrodes is provided above the electronic electrostatic filter; a water retaining curtain is provided on the rear side of the electronic electrostatic filter for blocking the spray water of the spray device from entering the centrifugal fan; a water collection device for collecting sewage flowing down after spraying and flushing is provided below the electronic electrostatic filter.

2. The air handling unit capable of washing electronic static electricity according to claim 1, characterized in that: The water curtain is a lifting roller curtain or a lifting folding curtain; when the centrifugal fan is running, the water curtain rises to the top of the air inlet pipe, and when the centrifugal fan stops and the dust collecting electrode is sprayed and flushed, the water curtain drops to the bottom of the air inlet pipe.

3. The air handling unit capable of washing electronic static electricity according to claim 1, characterized in that: The water retaining curtain is a 90° rotating water retaining curtain; when the centrifugal fan is running, the surface of the rotating water retaining curtain is parallel to the axis of the air inlet pipe of the centrifugal fan; when the centrifugal fan is stopped and the dust collecting electrode is sprayed and flushed, the surface of the rotating water retaining curtain is perpendicular to the axis of the air inlet pipe of the centrifugal fan.

4. The air handling unit capable of washing electronic static electricity according to claim 1, characterized in that: The water collecting device is a box-type water collector or a funnel-shaped water collector with a drainage hole at the bottom and an opening at the top.

5. The air handling unit capable of washing electronic static electricity according to claim 1, characterized in that: The plate-type primary filter comprises a plurality of filter units arranged in sequence and a mounting frame. The filter unit comprises a filter screen plate. The mounting frame is provided with a slide groove. The filter screen plate is detachably inserted into the slide groove.

6. The air handling unit capable of washing electronic static electricity according to claim 1, characterized in that: A heat exchange device is also provided in the air inlet duct, and the heat exchange device includes a coil; by circulating cold water or hot water in the coil, the air flowing through the air inlet duct is cooled, dehumidified or heated accordingly.

7. The air handling unit capable of washing electronic static electricity according to claim 6, characterized in that: The heat exchange device is located at the rear side of the electronic electrostatic filter and above the water collecting device; when cold water circulates in the coil, the water collecting device collects condensed water generated by the heat exchange device.

8. The air handling unit capable of washing electronic static electricity according to claim 1, characterized in that: The box is also equipped with a silencer for reducing the noise of the air handling unit. The silencer is made of galvanized perforated plate folded and welded, and is filled with sound-absorbing cotton inside.

9. The air handling unit capable of washing electronic static electricity according to claim 1, characterized in that: The box body is enclosed by multiple layers of panels, which are, from the outside to the inside, a color-coated steel layer, a polyurethane foam layer, and a galvanized steel layer.

10. The air handling unit capable of washing electronic static electricity according to claim 1, characterized in that: A guide rail is provided on the base, and the mounting bases of the fan and the motor are slidably matched with the guide rail.

Images