CN116809237A - Electrostatic dust collector and air purification equipment - Google Patents

Abstract

The application relates to the technical field of air purification and discloses an electrostatic dust collection device and air purification equipment, wherein the electrostatic dust collection device comprises a dust collection chamber, a corona discharge module, an alternating current charging module and an accelerating electric field module, wherein the corona region, a collision region and the accelerating region are sequentially arranged in the dust collection chamber, the corona discharge module is suitable for generating plasmas, the alternating current charging module is suitable for forming a high-voltage alternating electric field so that charged ions and charged particles do spiral track motion in the collision region, and the accelerating electric field module is suitable for enabling the charged particles to do accelerating motion in the direction of a dust collection port and discharge. According to the application, through the transformation of the high-voltage alternating current electric field, charged ions, charged particles and particles are fully mixed in the collision zone, so that the particles are fully charged, the charged particles are fully accelerated through the accelerating electric field module, the approaching speed of the tiny particles is improved, the collection efficiency of the tiny particles is improved, and the dust removal efficiency of the electrostatic dust removal device under high wind speed is improved.

Description

Electrostatic dust collector and air purification equipment

Technical Field

The application relates to the technical field of air purification, in particular to an electrostatic dust collection device and air purification equipment.

Background

The existing electrostatic dust collector cannot realize high dust collection efficiency at high wind speed, because dust particles and charged particles in the air are insufficiently charged and are not uniform in a corona region. Specifically, under the condition of high wind speed, the residence time of the particles in a corona zone is too short, the charging time is very limited, particles which are not charged or are less charged are insufficient in coulomb force due to insufficient charging quantity, the approaching speed is reduced, and the dust collection efficiency is low. Particularly, some fine particles are less efficient or even impossible to collect.

Disclosure of Invention

In view of the above, the application provides an electrostatic dust collection device and an air purification device, which are used for solving the problems of uneven particle charge and low dust collection efficiency of the electrostatic dust collection device in the prior art under high wind speed.

In a first aspect, the application provides an electrostatic dust collection device, which comprises a dust collection chamber, a corona discharge module, an alternating current charging module and an accelerating electric field module. The dust chamber is provided with an air inlet and a dust collecting port, and a corona zone, a collision zone and an acceleration zone are sequentially arranged in the dust chamber from the air inlet to the dust collecting port. The corona discharge module is arranged in a corona zone and is suitable for generating plasma in the corona zone through corona discharge, and electrons and charged ions in the plasma are suitable for adhering with particles in the air to form charged particles. The alternating current charging module is arranged in the collision zone and is suitable for forming a high-voltage alternating electric field in the collision zone, so that charged ions and charged particles do spiral track motion in the collision zone, and further the charged ions, the charged particles and the particles collide with each other and are fully charged. The accelerating electric field module is arranged in the accelerating area and is suitable for enabling particles with complete charges to be discharged in the accelerating area in an accelerating motion towards the dust collecting opening.

The beneficial effects are that: through the transformation of the high-voltage alternating current electric field of the alternating current charging module, charged ions and charged particles do spiral motion in a collision zone, so that the charged particles, the charged particles charged in the corona zone and particles in the air can collide with each other in the collision zone and are fully mixed, the particles are fully charged, meanwhile, the charging uniformity of the particles is improved, the dust collection efficiency is improved, the problems that the existing electrostatic dust collection device is too short in stay time of the particles in the corona zone and limited in charging time under the condition of high wind speed, the charged particles are not charged or less charged, the received coulomb force is insufficient due to insufficient charging quantity, the approach speed is reduced, and the dust collection efficiency is low are effectively solved. In addition, through the accelerating electric field module that sets up, the complete particle that charges in the collision zone accelerates through accelerating electric field module, improves the approach speed of tiny particle matter to improve the collection efficiency to tiny particle matter, and then improve electrostatic precipitator's dust collection efficiency under high wind speed.

In an alternative embodiment, the ac charging module includes a first electrode plate and a second electrode plate, the first electrode plate adapted to be connected to a high voltage end of a high voltage ac power source; the second electrode plate is arranged in parallel with the first electrode plate at intervals, and is suitable for being connected with the low-voltage end of the high-voltage alternating current power supply; an alternating current electric field is formed between the first electrode plate and the second electrode plate, and under the action of the alternating current electric field, the charged ions and charged particles do directional spiral track motion in the collision zone.

The beneficial effects are that: a high-voltage alternating current electric field is formed between the first electrode plate and the second electrode plate, charged ions and particles do spiral track motion under the action of the alternating current electric field, and then the dust-containing air is charged by using diffusion charge, so that incompletely charged particles are collided and mixed with charged ions for many times, the charging is fully carried out, the charging uniformity of the particles is improved, and the dust removal efficiency is greatly improved. The electrostatic dust collection module provided by the application enables charged ions and particles to be fully mixed through controlling the electric field transformation of high-voltage alternating current, so that the particles are fully charged, and the problems of uneven particle charge and low dust collection efficiency of the existing electrostatic dust collection device under high wind speed are effectively solved.

In an alternative embodiment, the accelerating electric field module comprises a third electrode plate and a fourth electrode plate, the fourth electrode plate and the third electrode plate are arranged in parallel at intervals, the electric polarity and the output voltage of the fourth electrode plate are the same as those of the third electrode plate, an accelerating electric field is formed between the third electrode plate and the fourth electrode plate, and the charged particles are accelerated to enter the dust collecting port under the pushing of electric field force.

The beneficial effects are that: the third electrode plate and the fourth electrode plate are arranged on two opposite sides of the dust chamber, the polarities and the voltages of the two electrode plates are the same, the electric field forces generated by the two electrode plates respectively approach to the middle position, the resultant force is that charged particles in the direction towards the dust collecting opening are in homopolar electric field, and all fine particles and the charged particles can do linear acceleration motion between the two parallel electrode plates, so that the particles enter the dust collecting opening in an accelerating way under the pushing of the electric field force, the approach speed of the particles is improved, and the dust collecting efficiency is further improved.

In this embodiment, the charged particles are accelerated by two parallel high-voltage electrode plates with the same polarity, so as to increase the approach speed of the ultra-fine particles, and thus increase the collection efficiency. Therefore, the problems that the existing air purifying equipment is low in collection efficiency and even incapable of collecting fine particles of 0.3-0.5 microns and the like are effectively solved.

In an alternative embodiment, the accelerating electric field module is connected with a high-voltage direct-current power supply; and the third electrode plate and the fourth electrode plate are respectively connected with the high-voltage end of the same high-voltage direct-current power supply.

The beneficial effects are that: the same high-voltage direct current power supply is respectively connected with the third electrode plate and the fourth electrode plate, so that the purposes of simplifying the structure, saving the cost and reducing the installation space are achieved.

In an alternative embodiment, the accelerating electric field module is connected with a high-voltage direct-current power supply; the high-voltage direct current power supply comprises a first high-voltage direct current power supply and a second high-voltage direct current power supply with the same output voltage; the third electrode plate is connected with the high-voltage end of the first high-voltage direct-current power supply, and the fourth electrode plate is connected with the high-voltage end of the second high-voltage direct-current power supply.

The beneficial effects are that: the voltages of the first high-voltage direct-current power supply and the second high-voltage direct-current power supply are of the same voltage and the same polarity, and the power is respectively supplied to the third electrode plate and the fourth electrode plate through two independent power supplies with the same output voltage, so that the installation of the third electrode plate and the fourth electrode plate is more convenient, and the problem that the two electrode plates share the same power supply wire is inconvenient is avoided.

In an alternative embodiment, the first electrode plate and the third electrode plate are sequentially arranged on one side of the dust chamber along the air flow direction, and the second electrode plate and the fourth electrode plate are sequentially arranged on the other side of the dust chamber along the air flow direction; the first electrode plate and the third electrode plate are separated by a first insulation structure, and the third electrode plate and the fourth electrode plate are separated by a second insulation structure.

The beneficial effects are that: through the first insulating structure isolation electrified first electrode plate and third electrode plate that sets up, through the second insulating structure isolation electrified second electrode plate and fourth electrode plate, prevent that two adjacent electrode plates from switching on.

In an alternative embodiment, the first electrode plate, the second electrode plate, the third electrode plate and the fourth electrode plate are all metal plates.

In an alternative embodiment, the accelerating electric field module further includes a grounded air outlet ring, the grounded air outlet ring is disposed at the dust collecting port, and the grounded air outlet ring is connected to the low voltage end of the high voltage dc power supply and grounded.

The beneficial effects are that: the grounding air outlet ring is used for grounding the low-voltage end of the same high-voltage direct current power supply shared by the third electrode plate and the fourth electrode plate, or the low-voltage ends of the first high-voltage direct current power supply and the second high-voltage direct current power supply which are respectively connected with the third electrode plate and the fourth electrode plate are commonly grounded, so that the effects of preventing electric shock and improving the use safety of equipment can be achieved.

In an alternative embodiment, the corona discharge module comprises a high voltage discharge electrode and a third high voltage dc power supply, the high voltage discharge electrode comprising a ring electrode and a needle electrode, the ring electrode being adapted to be connected to the low voltage end of the third high voltage dc power supply; the needle electrode is positioned at the center of the annular electrode and is suitable for being connected with the high-voltage end of the third high-voltage direct-current power supply; the needle electrode and the annular electrode have a set discharge distance between the inner annular surface, a potential difference is arranged between the needle electrode and the annular electrode, and corona discharge is generated by the needle electrode under the action of the potential difference.

The beneficial effects are that: by means of the needle electrode and the annular electrode, when the electrostatic dust collector is started, air can be broken down at the needle point to generate a large amount of plasmas, and therefore preparation is made for subsequent particle charging.

In an alternative embodiment, the electrostatic dust collection device further comprises a dust collection cover, the dust collection cover is arranged between the accelerating electric field module and the dust collection opening, and a diversion channel which is suitable for collecting and guiding charged particles accelerated by the accelerating electric field module to the dust collection opening is arranged in the dust collection cover.

The beneficial effects are that: the dust hood can collect, gather and guide particles in the air, and prevent the particles from dispersing all around.

In an alternative embodiment, the dust hood is an insulating air duct, and the dust hood comprises a reducing section, and the inner diameter of the reducing section gradually decreases along the gas flow direction.

The beneficial effects are that: through the gradual narrowing reducing section that sets up, the air-out area reduces gradually, according to V=Q/S, at the unchangeable condition of amount of wind Q, air-out area S diminishes, and speed V will become great, improves the air-out speed of particulate matter, and then improves the collection effect to tiny particulate matter.

In a second aspect, the application also provides air purifying equipment, which comprises the electrostatic dust collection device in any embodiment.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present application, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of an electrostatic precipitator according to an embodiment of the present application;

FIG. 2 is a schematic top view of an electrostatic precipitator according to an embodiment of the present application;

FIG. 3 is a schematic view of a dust hood according to an embodiment of the present application;

fig. 4 is a schematic structural view of another embodiment of a dust hood according to an embodiment of the present application.

Reference numerals illustrate:

100. a dust removal chamber; 101. an air inlet; 102. a dust collection port;

10. a corona discharge module; 11. a high-voltage discharge electrode; 111. a needle electrode; 112. a ring electrode; 12. a third high voltage dc power supply;

20. an alternating current charging module; 21. a first electrode plate; 22. a second electrode plate; 23. a high voltage ac power supply;

30. an accelerating electric field module; 31. a third electrode plate; 32. a fourth electrode plate; 33. a first high voltage dc power supply; 34. a second high voltage dc power supply; 35. a grounded air outlet ring; 36. a first insulating structure; 37. a second insulating structure;

40. a dust collection cover; 41. a reducing section; 42. and outputting the segment.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

In the description of the present application, it should be noted that the positional or positional relationship indicated by the terms such as "inner", "upper", "outer", "lower", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be in mechanical communication or in electrical communication; the two components can be directly connected or indirectly connected through an intermediate medium, or can be communicated inside the two components, or can be communicated wirelessly or by wires. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

In the related art, the electrostatic dust collection device cannot achieve high dust collection efficiency at high wind speed, because dust particles and charged particles in the air are insufficiently charged in a corona region and are not uniform.

Specifically, under the condition of high wind speed, the residence time of the particles in a corona zone is too short, the charging time is very limited, particles which are not charged or are less charged are insufficient in coulomb force due to insufficient charging quantity, the approaching speed is reduced, and the dust collection efficiency is low. Particularly, some fine particles with the size of 0.3-0.5 microns are lower in collection efficiency and even cannot be collected.

Embodiments of the present application are described below with reference to fig. 1 to 4.

According to an embodiment of the present application, in one aspect, the present application provides an electrostatic precipitator including a dust chamber 100, a corona discharge module 10, an ac charging module 20, and an accelerating electric field module 30.

Specifically, the dust chamber 100 is provided with an air inlet 101 and a dust collecting port 102, and a corona zone, a collision zone and an acceleration zone are sequentially arranged in the dust chamber 100 from the air inlet 101 to the dust collecting port 102.

Further, as shown in fig. 1 and 2, the corona discharge module 10 is disposed in a corona region and is adapted to generate a plasma in the corona region by corona discharge, and electrons and charged ions in the plasma are adapted to adhere to particles in air to form charged particles. The ac charging module 20 is disposed in the collision zone, and is adapted to form a high-voltage alternating electric field in the collision zone, so that the charged ions and the charged particles perform spiral track motion in the collision zone, and further the charged ions, the charged particles and the particles collide with each other to be fully charged.

Further, the accelerating electric field module 30 is disposed in the accelerating region, and is adapted to make the fully charged particles perform accelerating movement in the accelerating region toward the dust collecting opening 102 for discharge.

In the above embodiment, through the transformation of the high-voltage ac electric field of the ac charging module 20, the charged ions and charged particles make a spiral motion in the collision area, so that the charged particles, the charged particles already charged in the corona area and the particles in the air can collide with each other in the collision area, and are fully mixed, so that the particles are fully charged, and meanwhile, the uniformity of charging of the particles is improved, and further, the dust collection efficiency is improved.

In addition, in this embodiment, through the accelerating electric field module 30, the particles completely charged in the collision area are accelerated by the accelerating electric field module 30, so as to increase the approaching speed of the tiny particles, thereby increasing the collection efficiency of the tiny particles, and further increasing the dust removal efficiency of the electrostatic dust collector under high wind speed.

In some embodiments, the ac charging module 20 includes a first electrode plate 21 and a second electrode plate 22, the first electrode plate 21 adapted to be connected to the high voltage side of the high voltage ac power source 23; the second electrode plate 22 is arranged in parallel with the first electrode plate 21 at intervals, and the second electrode plate 22 is suitable for being connected with the low-voltage end of the high-voltage alternating current power supply 23; an alternating current electric field is formed between the first electrode plate 21 and the second electrode plate 22, and charged ions and charged particles move in a directional spiral track in a collision zone under the action of the alternating current electric field.

In the above embodiment, the first electrode plate 21 and the second electrode plate 22 are disposed on opposite sides of the dust chamber 100, a high-voltage ac electric field is formed between the first electrode plate 21 and the second electrode plate 22, and a large amount of ions and particles do spiral track motion under the action of the ac electric field, so as to charge the dust-containing air by using diffusion charge, so that the incompletely charged particles collide and mix with the charged ions many times, and are fully charged, and the uniformity of the charged particles is improved, thereby greatly improving the dust removal efficiency. According to the embodiment, charged ions and particles are fully mixed through electric field transformation of high-voltage alternating current, so that the particles are fully charged, and the problems of uneven particle charging and low dust removal efficiency of the existing electrostatic dust removal device under high wind speed are effectively solved.

It should be noted that the directional spiral track motion in this embodiment refers to the spiral track motion of the charged particles from the air inlet 101 to the direction close to the dust collecting opening 102, that is, the spiral track motion from the corona region to the direction close to the acceleration region.

In some embodiments, the accelerating electric field module 30 includes a third electrode plate 31 and a fourth electrode plate 32, the fourth electrode plate 32 is disposed in parallel with the third electrode plate 31 at intervals, the electric polarity and the output voltage of the fourth electrode plate 32 are the same as those of the third electrode plate 31, an accelerating electric field is formed between the third electrode plate 31 and the fourth electrode plate 32, and charged particles are accelerated into the dust collecting port 102 under the pushing of the electric field force.

In the above embodiment, the third electrode plate 31 and the fourth electrode plate 32 are disposed on opposite sides of the dust chamber 100, the polarities and voltages of the two electrode plates are the same, the electric field forces generated by the two electrode plates approach to the middle position, and the resultant force is in the direction toward the dust collecting port 102. All fine particles and charged particles can do linear acceleration motion between two parallel electrode plates under the homopolar electric field, so that the particles are accelerated to enter the dust collection port 102 under the pushing of the electric field force, the approaching speed of the particles is improved, and the dust collection efficiency is further improved.

In this embodiment, the charged particles are accelerated by two parallel high-voltage electrode plates with the same polarity, so as to increase the approach speed of the ultra-fine particles, and thus increase the collection efficiency. Therefore, the problems that the existing air purifying equipment is low in collection efficiency and even incapable of collecting fine particles of 0.3-0.5 microns and the like are effectively solved.

In some embodiments, the accelerating electric field module 30 is connected to a high voltage dc power supply; the third electrode plate 31 and the fourth electrode plate 32 are connected to the high voltage side of the same high voltage dc power supply, respectively.

In the above embodiment, the same high-voltage direct current power supply is respectively connected with the third electrode plate 31 and the fourth electrode plate 32, so that the purposes of simplifying the structure, saving the cost and reducing the installation space are achieved.

In other alternative implementation of the above embodiment, the hvdc power source includes a first hvdc power source 33 and a second hvdc power source 34 having the same output voltage, the third electrode plate 31 is connected to the high voltage end of the first hvdc power source 33, and the fourth electrode plate 32 is connected to the high voltage end of the second hvdc power source 34.

In the above embodiment, the voltages of the first hvdc power source 33 and the second hvdc power source 34 are the same in polarity and the same in voltage, and the two independent power sources with the same output voltage supply the third electrode plate 31 and the fourth electrode plate 32 respectively, so that the installation of the third electrode plate 31 and the fourth electrode plate 32 is more convenient, and the problem that the two electrode plates share the same power source and are inconvenient to wire is avoided.

Preferably, as shown in fig. 1, the third electrode plate 31 and the fourth electrode plate 32 are connected to a first high-voltage direct current power supply 33 and a second high-voltage direct current power supply 34, respectively, in the present embodiment.

In some embodiments, the first electrode plate 21 and the third electrode plate 31 are sequentially arranged on one side of the dust chamber 100 in the air flow direction, and the second electrode plate 22 and the fourth electrode plate 32 are sequentially arranged on the other side of the dust chamber 100 in the air flow direction; wherein the first electrode plate 21 and the third electrode plate 31 are separated by a first insulation structure 36, and the third electrode plate 31 and the fourth electrode plate 32 are separated by a second insulation structure 37.

In the above embodiment, the charged first electrode plate 21 and the third electrode plate 31 are isolated by the first insulating structure 36 provided, and the charged second electrode plate 22 and the fourth electrode plate 32 are isolated by the second insulating structure 37, so that the conduction of the adjacent two electrode plates is prevented.

Alternatively, the first insulation structure 36 may be fixed at an end of the third electrode plate 31 adjacent to the first electrode plate 21, and the second insulation structure 37 may be fixed at an end of the fourth electrode plate 32 adjacent to the second electrode plate 22. The first insulating structure 36 and the second insulating structure 37 are insulators, respectively. The first insulating structure 36 and the second insulating structure 37 are each made of an insulating material such as ceramic, plastic or glass.

In some embodiments, the first electrode plate 21, the second electrode plate 22, the third electrode plate 31, and the fourth electrode plate 32 are all metal plates.

In some embodiments, the accelerating electric field module 30 further includes a grounded air outlet ring 35, the grounded air outlet ring 35 is disposed at the dust collecting port 102, and the grounded air outlet ring 35 is connected to the low voltage end of the high voltage dc power supply of the accelerating electric field module 30 and grounded.

Specifically, in one specific embodiment, the ground air-out ring 35 is connected to the low voltage ends of the first high voltage dc power supply 33 and the second high voltage dc power supply 34, respectively, and the ground air-out ring 35 is grounded.

The grounding air outlet ring 35 is used for grounding the low voltage end of the same high-voltage direct current power supply shared by the third electrode plate 31 and the fourth electrode plate 32, or the low voltage ends of the first high-voltage direct current power supply 33 and the second high-voltage direct current power supply 34 which are respectively connected with the third electrode plate 31 and the fourth electrode plate 32 are grounded together, so that the effects of preventing electric shock and improving the use safety of equipment can be achieved.

Specifically, the ground air-out ring 35 is a circular ring-shaped metal ring, the ground air-out ring 35 is arranged on the inner side of the side wall of the dust chamber 100, which is provided with the dust collecting opening 102, and the inner diameter of the ground air-out ring 35 is matched with the inner diameter of the dust collecting opening 102 in size so as to allow particles to pass through and avoid shielding. Alternatively, in another embodiment, the outer diameter of the ground air-out ring 35 is matched with the inner diameter of the dust collecting port 102, and the ground air-out ring 35 is embedded in the dust collecting port 102.

In some embodiments, corona discharge module 10 includes a high voltage discharge electrode 11 and a third high voltage dc power supply 12, high voltage discharge electrode 11 including a ring electrode 112 and a needle electrode 111, ring electrode 112 adapted to be connected to the low voltage end of third high voltage dc power supply 12; the needle electrode 111 is located at the center of the ring electrode 112, and the needle electrode 111 is adapted to be connected to the high voltage end of the third high voltage dc power supply 12; the needle electrode 111 and the inner annular surface of the annular electrode 112 have a set discharge distance therebetween, a potential difference is provided between the needle electrode 111 and the annular electrode 112, and the needle electrode 111 generates corona discharge by the potential difference.

In the above embodiment, by providing the needle electrode 111 and the ring electrode 112, when the electrostatic precipitator is started, air is broken down at the needle tip by using the tip discharge principle, and a large amount of plasma is generated, thereby preparing for the subsequent particle charging.

Further, the set discharge distance is D, and 0 < D < 20mm. The ring electrode 112 is suitable for grounding, and the ring electrode 112 is used as a discharge ring for grounding, so that the electric shock can be prevented, and the use safety of the equipment can be improved.

In the present embodiment, the high-voltage discharge electrode 11 is a needle-ring discharge electrode structure, but other electrode structures may be used instead, for example, a wire-plate electrode structure or a saw-tooth-plate electrode structure. The specific structure of the high-voltage discharge electrode 11 is not limited in this embodiment, as long as corona discharge can be generated by ionization.

In some embodiments, the electrostatic precipitator further includes a dust hood 40, where the dust hood 40 is disposed between the accelerating electric field module 30 and the dust collecting opening 102, and a flow guide channel is provided in the dust hood 40, and is adapted to collect and guide the charged particles accelerated by the accelerating electric field module 30 to the dust collecting opening 102.

In the above embodiment, the dust hood 40 is provided to collect, gather and guide the particulate matters in the air, thereby preventing the particulate matters from diffusing around.

In some embodiments, the dust hood 40 is an insulated air duct, and the dust hood 40 includes a reducing section 41, and an inner diameter of the reducing section 41 gradually decreases along a gas flow direction.

In the above embodiment, the air outlet area is gradually reduced by the gradually narrowing variable diameter section 41, and according to v=q/S, when the air volume Q is unchanged, the air outlet area S is reduced, the speed V is increased, the air outlet speed of the particulate matter is increased, and the collection effect of the fine particulate matter is further improved.

Further, the large diameter end of the variable diameter section 41 is connected to the ends of the third electrode plate 31 and the fourth electrode plate 32 remote from the alternating current charging module 20. The inner diameter of the large diameter end of the variable diameter section 41 is identical to the distance between the third electrode plate 31 and the fourth electrode plate 32. The dust collecting cover 40 further comprises an output section 42 with a constant inner diameter, the small-caliber end of the variable-diameter section 41 is connected with the output section 42, the other end of the output section 42 is provided with a grounding air outlet ring 35, and the other end of the output section 42 is communicated with the dust collecting port 102.

Alternatively, as shown in fig. 1 and 3, the variable diameter section 41 has a frustum-shaped structure, and the output section 42 has a cylindrical structure.

Of course, as shown in fig. 4, in other alternative embodiments, the dust cap 40 includes only the reducing section 41, i.e., the output section 42 in the above-described embodiments is omitted. The dust collecting cover 40 has a circular truncated cone-shaped peripheral wall.

The working process and principle of the electrostatic precipitator of the present embodiment will be described with reference to fig. 1 to 3.

First, a needle-ring high voltage discharge electrode 11 is disposed at the air inlet 101 of the electrostatic precipitator, wherein the needle tip of the needle electrode 111 is located at the central axis of the ring electrode 112, the needle electrode 111 has a certain discharge distance from the inner peripheral surface of the ring electrode 112, the high voltage end of the third high voltage dc power supply 12 is connected to the needle electrode 111, and the low voltage end is connected to the ring electrode 112. By utilizing the point discharge principle, when the device operates, air can be broken down at the needle point to generate a large amount of plasmas, so that preparation is made for the charge of subsequent particles;

further, below the needle-ring high voltage discharge electrode 11, two parallel first and second electrode plates 21 and 22 are provided, the first and second electrode plates 21 and 22 being connected to the high and low voltage ends of the high voltage ac power supply 23, respectively. When charged ions and particles are in spiral track motion under the action of an alternating current electric field, a large number of ions and particles are in spiral track motion, so that the effect of diffusing charge is improved, and incompletely charged particles collide with the ions for many times and are fully charged.

Further, a third electrode plate 31 and a fourth electrode plate 32 are respectively arranged below the first electrode plate 21 and the second electrode plate 22, and the third electrode plate 31 and the fourth electrode plate 32 are arranged in parallel at intervals. The third electrode plate 31 is connected to the high voltage end of the first high voltage dc power supply 33, and the fourth electrode plate 32 is connected to the high voltage end of the second high voltage dc power supply 34. The third electrode plate 31 and the fourth electrode plate 32 have the same electric polarity and output the same voltage, and insulators are respectively arranged between the first electrode plate 21 and the third electrode plate 31 and between the second electrode plate 22 and the fourth electrode plate 32 for separation. At this time, the charged particles are accelerated and directly moved between the third electrode plate 31 and the fourth electrode plate 32 in parallel under the homopolar electric field when passing through the acceleration region, all fine particles are collected and accelerated, the approach speed of the particles is improved, and the dust accumulation effect is further improved.

Further, the narrowed dust collecting cover 40 is disposed below the third electrode plate 31 and the fourth electrode plate 32, so that the air outlet area can be reduced, the air outlet area S becomes smaller, the speed V becomes larger, the air outlet speed of the fine particles is increased, and the collection effect of the fine particles is further improved.

Therefore, the electrostatic precipitator provided in this embodiment has the following advantages:

1. through the arrangement of the alternating current charging module 20, the electric field of high-voltage alternating current in the collision area is changed, so that charged ions and particles are repeatedly collided and fully mixed, the electric charge quantity of charged particles is ensured by utilizing an alternating electric field, the particles are fully charged, a key effect is played for accelerating and collecting subsequent particles, and the efficiency is greatly increased.

2. By setting the accelerating electric field module 30, the fully charged particles are accelerated by the third electrode plate 31 and the fourth electrode plate 32 with parallel high voltage and same polarity, so that the approaching speed to ultra-fine particles is increased, and the collecting efficiency is improved.

3. By the arrangement of the dust hood 40 with the reducing section 41, the air outlet area is reduced, so that the air outlet speed of the particles is improved and the collection effect of the fine particles is improved under the condition of unchanged pressure.

According to an embodiment of the present application, in another aspect, there is provided an air cleaning apparatus including the electrostatic dust collection device of any one of the above embodiments.

The air purification equipment that this embodiment provided through adopting the electrostatic precipitator device of above-mentioned embodiment, has realized the high-efficient collection to tiny particulate matter, improves the dust removal efficiency of air purification equipment under high wind speed simultaneously greatly.

Optionally, in this embodiment, the air purifying device is a dust remover.

Although embodiments of the present application have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the application, and such modifications and variations fall within the scope of the application as defined by the appended claims.

Claims (10)

1. An electrostatic precipitator device, comprising:

the dust removal chamber (100), the dust removal chamber (100) is provided with an air inlet (101) and a dust collecting port (102), and a corona zone, a collision zone and an acceleration zone are sequentially arranged in the dust removal chamber (100) from the air inlet (101) to the dust collecting port (102);

the corona discharge module (10) is arranged in the corona zone and is suitable for generating plasma in the corona zone by corona discharge, and electrons and charged ions in the plasma are suitable for adhering with particles in the air to form charged particles;

the alternating current charging module (20) is arranged in the collision zone and is suitable for forming a high-voltage alternating electric field in the collision zone, so that charged ions and charged particles do spiral track motion in the collision zone, and further the charged ions, the charged particles and the particles collide with each other and are fully charged;

and an accelerating electric field module (30) which is arranged in the accelerating area and is suitable for discharging the particles with complete charge in the accelerating area in an accelerating movement towards the dust collecting opening (102).

2. Electrostatic precipitator device according to claim 1, in which the ac charging module (20) comprises:

a first electrode plate (21) adapted to be connected to a high voltage end of a high voltage alternating current power supply (23);

a second electrode plate (22) arranged in parallel with the first electrode plate (21) at intervals, wherein the second electrode plate (22) is suitable for being connected with the low-voltage end of the high-voltage alternating current power supply (23);

an alternating current electric field is formed between the first electrode plate (21) and the second electrode plate (22), and under the action of the alternating current electric field, the charged ions and charged particles move in a directional spiral track in a collision zone.

3. Electrostatic precipitator device according to claim 2, in which the accelerating electric field module (30) comprises:

a third electrode plate (31);

and the fourth electrode plate (32) is arranged at intervals parallel to the third electrode plate (31), the electric polarity and the output voltage of the fourth electrode plate (32) are the same as those of the third electrode plate (31), an accelerating electric field is formed between the third electrode plate (31) and the fourth electrode plate (32), and charged particles are accelerated into the dust collecting port (102) under the pushing of electric field force.

4. An electrostatic precipitator device according to claim 3, in which the accelerating electric field module (30) is connected to a high voltage dc power supply;

the third electrode plate (31) and the fourth electrode plate (32) are respectively connected with the high-voltage end of the same high-voltage direct-current power supply; or the high-voltage direct current power supply comprises a first high-voltage direct current power supply (33) and a second high-voltage direct current power supply (34) with the same output voltage, the third electrode plate (31) is connected with the high-voltage end of the first high-voltage direct current power supply (33), and the fourth electrode plate (32) is connected with the high-voltage end of the second high-voltage direct current power supply (34).

5. An electrostatic precipitator according to claim 3, in which the first and third electrode plates (21, 31) are arranged in sequence in the direction of the air flow on one side of the precipitator (100), and the second and fourth electrode plates (22, 32) are arranged in sequence in the direction of the air flow on the other side of the precipitator (100);

wherein the first electrode plate (21) and the third electrode plate (31) are separated by a first insulation structure (36), and the third electrode plate (31) and the fourth electrode plate (32) are separated by a second insulation structure (37).

6. The electrostatic precipitator device according to claim 4, wherein the first electrode plate (21), the second electrode plate (22), the third electrode plate (31) and the fourth electrode plate (32) are all metal plates;

and/or, the accelerating electric field module (30) further comprises a grounding air outlet ring (35), the grounding air outlet ring (35) is arranged at the dust collecting port (102), and the grounding air outlet ring (35) is connected with the low-voltage end of the high-voltage direct-current power supply and grounded.

7. The electrostatic precipitator device according to any of claims 1-6, wherein the corona discharge module (10) comprises a high voltage discharge electrode (11) and a third high voltage dc power supply (12), the high voltage discharge electrode (11) comprising:

a ring electrode (112) adapted to be connected to the low voltage end of the third high voltage dc power supply (12);

a needle electrode (111) located in the center of the ring electrode (112), the needle electrode (111) being adapted to be connected to the high voltage end of the third high voltage dc power supply (12);

the needle electrode (111) and the inner annular surface of the annular electrode (112) have a set discharge distance, a potential difference is arranged between the needle electrode (111) and the annular electrode (112), and the needle electrode (111) generates corona discharge under the action of the potential difference.

8. The electrostatic precipitator device according to any one of claims 1-6, further comprising:

the dust collection cover (40) is arranged between the accelerating electric field module (30) and the dust collection opening (102), and a diversion channel which is suitable for collecting and guiding charged particles accelerated by the accelerating electric field module (30) to the dust collection opening (102) is arranged in the dust collection cover (40).

9. The electrostatic precipitator device according to claim 8, wherein the dust hood (40) is an insulating air duct, the dust hood (40) comprising a reducing section (41), the inner diameter of the reducing section (41) gradually decreasing in the direction of the gas flow.

10. An air cleaning apparatus comprising an electrostatic precipitator device according to any one of claims 1 to 9.