CN211914193U

CN211914193U - Air purification apparatus for separating airborne particles from an air stream

Info

Publication number: CN211914193U
Application number: CN201922361128.1U
Authority: CN
Inventors: 拉尔斯·韦特; 埃米·海林; 卡尔·约翰·达尔格伦; 大卫·马克斯·奥德尔罗斯; 阿蒂拉·福多尔
Original assignee: Boluya Technology Shenzhen Co ltd
Current assignee: Kaibin yayou Technology (Shenzhen) Co., Ltd
Priority date: 2019-12-24
Filing date: 2019-12-24
Publication date: 2020-11-13
Anticipated expiration: 2029-12-24

Abstract

An air purification apparatus for separating airborne particles from an air stream is disclosed. The air purification device comprises an ionization unit arranged to create an ionization volume for charging airborne particles present in an air flow. The ionization unit includes an emitter electrode and a pair of collector electrodes. The air purification apparatus further comprises a filter medium arranged to attract at least a subset of the electrically charged airborne particles. The emitter electrode is an elongated structure and includes a plurality of corona discharge points distributed along the length of the emitter electrode. A plurality of corona discharge points are directed away from the filter media. Each collector electrode is an elongated structure flattened in a plane substantially perpendicular to the airflow. The emitter electrode and the pair of collector electrodes are arranged substantially parallel to each other. This enables the generation of a substantially uniform ionization volume when using the air purification apparatus, thereby providing substantially uniform charging of airborne particles in the ionization volume.

Description

Air purification apparatus for separating airborne particles from an air stream

Technical Field

The present disclosure relates to the field of air purification. More particularly, the present disclosure relates to an air purification apparatus for separating airborne particles (airborn particles) from an air stream.

Background

In many different technical fields, like for example different types of vehicles or buildings, air filtration systems are used to ensure a desired air quality in a cabin or a building or other enclosed space.

Ionization filtration systems are often used because they provide effective cleaning of airborne particles. The ionization filter system includes an ionizer configured to generate an ionization volume for charging particles in air such that the particles adhere to a filter medium disposed downstream of an air flow path.

Ions can be generated in several ways, but one frequently used arrangement comprises an emitter electrode and a collector electrode, e.g. a corona tip surrounded by a collector electrode which can be connected to ground, such that when a high voltage is applied across the emitter electrode and the collector electrode, ions are generated in a volume surrounding the emitter electrode (i.e. the corona tip). The volume in which the ions are generated is referred to as the ionization volume, and the emitter and collector electrodes are preferably arranged such that the ionization volume spans the flow path. At least a portion of the particles become charged as they pass through the ionization volume. The charged particles then adhere to the filter media downstream of the airflow path.

When providing an ionization filter system in a vehicle, there are several parameters to consider, such as the need for an ionization volume of sufficient size, i.e. the volume where airborne particles are charged by the ion field, limited space for different systems and components, limited possibilities for the influence of electromagnetic emissions from the ionization filter system to affect other components and to adapt to other devices and arrangements, the addition of other arrangements in the air flow to affect the air flow, etc. Therefore, there is a need for an ionization arrangement that provides a suitable compromise between different limiting parameters.

SUMMERY OF THE UTILITY MODEL

It is an object of the present disclosure to provide an air purification apparatus that seeks to mitigate, alleviate or eliminate one or more of the above-identified deficiencies in the art and disadvantages singly or in any combination.

This object is achieved by the air cleaning device provided by the present disclosure.

An air purification apparatus for separating airborne particles from an air stream is provided. The air purification device comprises an ionization unit arranged to create an ionization volume for charging airborne particles present in an air flow. The ionization unit comprises an emitter electrode and a pair of collector electrodes, and a filter medium arranged to attract at least a subset of the charged airborne particles. The emitter electrode is an elongated structure and includes a plurality of corona discharge points distributed along the length of the emitter electrode. At least a portion of the plurality of corona discharge points are directed away from the filter media. Each collector electrode is an elongated structure flattened in a plane substantially perpendicular to the airflow. The emitter electrode and the pair of collector electrodes are arranged substantially parallel to each other.

In an embodiment, the emitter electrode and the collector electrode are arranged such that an ionization volume is created in a direction away from or parallel to the filter medium.

The emitter electrode is an elongated structure and the plurality of corona discharge points are distributed along the length of the emitter electrode, each collector electrode is an elongated structure, and the emitter electrode and the collector electrode are arranged substantially parallel to each other. This enables the generation of a substantially uniform ionization volume when using the air purification apparatus, thereby providing substantially uniform charging of airborne particles in the ionization volume.

The collector electrode is a flat and elongated structure so that the arrangement of the collector electrode enables the desired ion field to be generated when the air cleaning device is used.

The filter media attracting the at least a subset of the charged airborne particles means that the at least a subset of the charged airborne particles are trapped in the filter media such that they are not in the air stream behind the filter media.

By air flow is meant the air flow through the equipment in use. The air flow may be actively generated in that it is driven by a fan or other such air displacing means, or it may be passive in that it is generated by directing air through a filter while a vehicle comprising such a device is being driven. The air flow may also be driven by the air conditioning system of the vehicle.

The plurality of corona discharge points may be, for example, a plurality of tips, carbon brushes, or the like, to create points having an electric field density sufficient to create a corona.

The corona generated when applying a voltage to the emitter may be either positive or negative. The voltage applied to the emitter electrode may be between-10 kV DC and 10kV DC, more preferably between-7 kV DC and 7kV DC.

A plurality of corona discharge points may be arranged on a single emitting electrode, in which case they are electrically connected to each other.

When the air cleaning apparatus is used, the collecting electrodes are flattened in a plane substantially perpendicular to the air flow, so that the space in the direction parallel to the air flow drawn in by the collecting electrodes can be reduced. This enables to maintain as large a distance as possible of the filter medium from the topmost to the bottommost, i.e. the thickness of the filter medium, for example for applications when the distance from the topmost to the bottommost of the combination of the ionization unit and the filter medium may not exceed a predetermined distance.

Drawings

The foregoing will be apparent from the following more particular description of example embodiments, as illustrated in the accompanying drawings in which like reference characters refer to the same parts throughout the different views. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating example embodiments.

Fig. 1 is a simplified cross-sectional view of an embodiment of an air purification apparatus of the present disclosure.

Fig. 2 is a perspective view of an emitter electrode that may be used in embodiments of the air purification apparatus of the present disclosure.

Fig. 3 is a perspective view of an emitter electrode and a pair of first type collectors that may be used in embodiments of the air purification apparatus of the present disclosure.

Detailed Description

Aspects of the present disclosure are described more fully hereinafter with reference to the accompanying drawings. The devices disclosed herein may, however, be embodied in many different forms and should not be construed as limited to the aspects set forth herein. Like numbers refer to like elements throughout.

The terminology used herein is for the purpose of describing particular aspects of the disclosure only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

Fig. 1 is a simplified cross-sectional view of an embodiment of an air purification apparatus 10 of the present disclosure. The air cleaning device 10 for separating airborne particles from an air flow comprises an ionization unit arranged to create an ionization volume for charging airborne particles present in the air flow. The ionization unit includes an emitter electrode 14 and a pair of

collector electrodes

16a, 16 b. Each

collector

16a, 16b is an elongated structure; the emitter electrode 14 and the

collector electrodes

16a, 16b are arranged substantially parallel to each other. The air purification apparatus 10 further comprises a filter medium 22, the filter medium 22 being arranged to attract at least a subset of the charged airborne particles in the air flow 18. The filter medium 22 is arranged after the ionization unit in the air flow 18.

Fig. 2 is a perspective view of an emitter electrode 14, which emitter electrode 14 may be used in embodiments of the air purification apparatus of the present disclosure (such as the air purification apparatus 10 disclosed in fig. 1).

In fig. 2, the emitter electrode 14 is shown as an elongated structure and includes a plurality of corona discharge points 20 distributed along the length of the emitter electrode, and the plurality of corona discharge points 20 are directed away from the filter media 22. A plurality of corona discharge points 20 are arranged on the emitter electrode 14 in electrical contact with the emitter electrode 14. The ionization unit is arranged for charging airborne particles present in the air flow 18 when the air cleaning device 10 is in use. This is accomplished by applying a positive or negative voltage to the emitter electrode 14 to create a corona at one or more corona discharge points 20. The voltage applied to the emitter electrode may be between-10 kV DC and 10kV DC, and more preferably between-7 kV DC and 7kV DC.

When using the air purification apparatus, the corona discharge point 20 is directed away from the filter medium 22 to create an ionized volume in a direction away from the filter medium 22.

Fig. 3 is a perspective view of the emitter electrode 14 and the pair of first

type collector electrodes

16a, 16b on the filter medium 22. the emitter electrode 14 and the pair of first

type collector electrodes

16a, 16b on the filter medium 22 may be used in embodiments of the air cleaning device of the present disclosure, such as the air cleaning device 10 disclosed in fig. 1. The emitter electrodes 14 are flat and elongated structures such that they are flattened in a plane substantially parallel to the air flow when the air cleaning device is in use. Similarly, the collecting

electrodes

16a, 16b are flat and elongated structures and are arranged such that they are flattened in a plane substantially perpendicular to the air flow when the air cleaning device is in use. The plurality of corona discharge points 20 of the emitter electrode 14 are arranged in the same direction such that when the plurality of corona discharge points 20 are arranged in the air cleaning apparatus, the plurality of corona discharge points 20 are directed away from the filter medium 22 to create an ionization volume in a direction away from the filter medium 22 when the air cleaning apparatus is used.

The two

collecting electrodes

16a, 16b are arranged such that the plurality of corona discharge points 20 of the emitter electrode 14 are at substantially the same distance from the respective portions of the collecting electrodes. More specifically, a plurality of corona discharge points 20 are distributed along the length of the emitter electrode 14, and a pair of

collector electrodes

16a, 16b are disposed on each side of the emitter electrode 14 and substantially parallel to the emitter electrode 14. In this embodiment, the

collector electrodes

16a, 16b have a flat configuration and are arranged such that they are flattened in a plane substantially perpendicular to the air flow.

It should be noted that the word "comprising" does not necessarily exclude the presence of other elements or steps than those listed and the word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. It should also be noted that any reference signs do not limit the scope of the claims, that the example embodiments may be implemented at least partly in both hardware and software, and that several "means", "units" or "devices" may be represented by the same item of hardware.

In the drawings and specification, there have been disclosed exemplary embodiments. However, many variations and modifications may be made to these embodiments. Accordingly, although specific terms are employed, they are used in a generic and descriptive sense only and not for purposes of limitation, the scope of the embodiments being defined by the following claims.

Claims

1. An air purification apparatus for separating airborne particles from an air stream, the air purification apparatus comprising:

an ionization unit arranged to create an ionization volume for charging airborne particles present in the air flow, the ionization unit comprising an emitter electrode and a pair of collector electrodes; and

a filter medium arranged to attract at least a subset of the airborne particles that are electrically charged,

wherein the emitter electrode is an elongated structure and comprises a plurality of corona discharge points distributed along a length of the emitter electrode, the plurality of corona discharge points directed away from the filter media,

each collector electrode is an elongated structure flattened in a plane perpendicular to the air flow, and

the emitter electrode and the pair of collector electrodes are arranged in parallel with each other.

2. Air cleaning device according to claim 1, characterized in that the emitter electrode and the collector electrode are arranged such that an ionization volume is created in a direction away from or parallel to the filter medium.