EP-4741061-A1 - ELECTROSTATIC DUST COLLECTION APPARATUS AND AIR PURIFICATION DEVICE

EP4741061A1EP 4741061 A1EP4741061 A1EP 4741061A1EP-4741061-A1

Abstract

The present disclosure relates to an electrostatic dust collection device and an air purification apparatus, including: a first electrode sheet and a second electrode sheet respectively in the form of a strip, wherein a plurality of first support bosses are respectively arranged on two sides of a first surface of the first electrode sheet; a plurality of second support bosses are respectively arranged on two sides of a first surface of the second electrode sheet; and after a second surface of the first electrode sheet is contacted and stacked on the second support bosses of the second electrode sheet, the electrostatic dust collection device is formed by winding. In the electrostatic dust collection device of the present disclosure, during the winding and molding process, it can precisely maintain the fixed spacing without the need for specific tooling to maintain the fixed gap. After the winding and molding process, a layered support structure can be formed, which solves the problem of difficulty in ensuring the spacing between the two electrostatic dust collection sheets after the spiral winding and molding. Moreover, the product can be assembled once the winding is completed, and there is no need for a subsequent processing step, such as dispensing or inserting the isolation comb.

Inventors

LU, Yaoyuan
ZHANG, QIDONG
WU, JUNYI

Assignees

Suzhou BeiAng Smart Technology Co., Ltd.

Dates

Publication Date: 20260513
Application Date: 20241014

Claims (20)

An electrostatic dust collection device, comprising: a first electrode sheet and a second electrode sheet respectively in a form of a strip, wherein a plurality of first support bosses are respectively arranged on two sides of a first surface of the first electrode sheet; a plurality of second support bosses are respectively arranged on two sides of a first surface of the second electrode sheet; and after a second surface of the first electrode sheet is contacted and stacked on the second support bosses of the second electrode sheet, the electrostatic dust collection device is formed by winding.
The electrostatic dust collection device according to claim 1, wherein the first electrode sheet comprises: a first substrate and a first conductive layer arranged on one side surface of the first substrate, wherein the plurality of first support bosses are arranged on two sides of the first conductive layer, and the plurality of first support bosses are at a same distance from the first conductive layer; and the second electrode sheet comprises: a second substrate and a second conductive layer arranged on one side surface of the second substrate, wherein the plurality of second support bosses are arranged on two sides of the second conductive layer, and the plurality of second support bosses are at a same distance from the second conductive layer.
The electrostatic dust collection device according to claim 2, wherein the first support bosses are arranged to extend in a transverse direction of the first electrode sheet, a width of one side of the first support bosses close to the first conductive layer is smaller than a width of one side of the first support bosses away from the first conductive layer, and the side of the first support bosses away from the first conductive layer is arranged in a form of a circular arc; and the second support bosses are arranged to extend in a transverse direction of the second electrode sheet, a width of one side of the second support bosses close to the second conductive layer is smaller than a width of one side of the second support bosses away from the second conductive layer, and the side of the second support bosses away from the second conductive layer is arranged in the form of a circular arc.
The electrostatic dust collection device according to claim 2, wherein the first support bosses and the first substrate are integrally molded; and the second support bosses and the second substrate are integrally molded.
The electrostatic dust collection device according to claim 4, wherein, after the first electrode sheet and the second electrode sheet are wound and molded, the first support bosses on the first electrode sheet and the second support bosses on the second electrode sheet, which are in adjacent layers, are staggered to each other.
The electrostatic dust collection device according to claim 5, wherein the two first support bosses in a transverse extension direction of the first electrode sheet do not overlap with the two second support bosses in a transverse extension direction of the second electrode sheet.
The electrostatic dust collection device according to claim 4, wherein the first support bosses and the second support bosses are both prepared by a heat pressing or adsorption process; the first support bosses form grooves on one side surface of the first substrate; the second support bosses form grooves on one side surface of the second substrate; the first support boss and the second support boss each has a supporting surface and an annular support sidewall surrounding outside the supporting surface; and the annular support sidewall is an inclined surface.
The electrostatic dust collection device according to claim 4, wherein both the first support bosses and the second support bosses are made of water-repellent materials.
The electrostatic dust collection device according to claim 4, wherein safety gaps are reserved between the first support bosses and the first conductive layer; safety gaps are reserved between the second support bosses and the second conductive layer; and a size of the safety gaps is larger than 1 mm.
The electrostatic dust collection device according to claim 2, wherein the first support bosses and the second support bosses are separate members and attached to the first substrate and the second substrate respectively.
The electrostatic dust collection device according to claim 2, wherein a spacing P1 between the two adjacent first support bosses on a same side, along with a thickness T1 of the first substrate, satisfies following relationship: P 1 < 35 T 1 ; and a spacing P2 between the two adjacent second support bosses on the same side, along with a thickness T2 of the second substrate, satisfies following relationship: P 2 < 35 T 2 .
The electrostatic dust collection device according to claim 2, wherein the first conductive layer and the second conductive layer are a collection electrode conductive layer and a repelling electrode conductive layer respectively, and a width of the collection electrode conductive layer is larger than a width of the repelling electrode conductive layer.
The electrostatic dust collection device according to claim 1, further comprising: a support frame, wherein the support frame has a center shaft, and the first electrode sheet and the second electrode sheet are helically wound outside the center shaft.
The electrostatic dust collection device according to any one of claims 2-12, wherein the first substrate and the second substrate are made of insulating materials.
The electrostatic dust collection device according to any one of claims 2-12, wherein the first substrate and the second substrate are film-like materials.
The electrostatic dust collection device according to any one of claims 2-12, wherein the first conductive layer and the second conductive layer adopt conductive adhesive films.
The electrostatic dust collection device according to any one of claims 2-12, wherein the first conductive layer and the second conductive layer are respectively printed onto the first substrate and the second substrate by using conductive ink.
The electrostatic dust collection device according to claim 7, wherein a width of the supporting surface is W, where 1.5 mm ≥ W ≥ 0.5 mm.
The electrostatic dust collection device according to claim 7, wherein an angle θ is formed between the supporting surface and the annular support sidewall, where 10° ≥ θ ≥ 1°.
An air purification apparatus, comprising: the electrostatic dust collection device according to any one of claims 1-19.

Description

CROSS-REFERENCE TO RELATED APPLICATION The present disclosure claims priority to Chinese patent Application No. 202411286216.9, filed with the Chinese Patent Office on September 13, 2024, entitled "ELECTROSTATIC DUST COLLECTION DEVICE AND AIR PURIFICATION APPARATUS", the entire contents of which are incorporated herein by reference. TECHNICAL FIELD The present disclosure relates to the technical field of electrostatic dust collection, and in particular to an electrostatic dust collection device and an air purification apparatus. BACKGROUND ART The electrostatic dust collection technology module is generally divided into the following two parts. <1> A corona device for ionizing the air, the device charging the air by the action of high-voltage ionization, is known as a discharge electrode, an ionization electrode, or a corona device, etc.<2> A dust collection device collecting particulate matter in the air, by which the moving charged particles are deposited on the electrode plate through the action of electric field force, is known as a collection electrode, or a dust collection electrode. The dust collector arranged by metal plates (or electrically conductive plates) has been developed quite well, but it is limited in use due to drawbacks. ① Due to issues such as the discharge spark, the spacing between exposed metal plates is too large, and a high voltage cannot be applied, so it is difficult to improve the filtration efficiency of the dust collection at one time.② The collection electrode module arranged by rectangular metal plates is usually in a cuboid shape. When matching with a circular fan or air duct section, the effective area beside the square inscribed within the circle is often wasted, and it is difficult to apply to the machine with an industrial design of a cylindrical-style appearance. Therefore, the technicians have researched disc-shaped collection electrodes other than rectangular collection electrodes, and the basic principles are as follows. The dust-collecting filter of the disc-shaped collection electrode is formed by two noncontacting electrodes wound together, and a gap air duct is formed between the electrodes. Different voltages are applied to the two electrodes, so as to form an electric field that is sufficient to absorb charged ions between the two electrodes. Under the action of the electric field force, the dust with different polarities moves towards electrodes with different polarities and is deposited on the electrodes, so that the dust and the gas can be separated. The disc-shaped collection electrode has the following three advantages in principle. ① The spacing between the electrodes can be made very small. The conductive layers of the two electrodes are isolated by the winding substrate with a thickness. Even if a very high voltage (usually 3~10K) is applied, there will be no discharge spark phenomenon, and the dust collection efficiency is very high.②Disc winding electrodes, by selecting the length and width of the electrode winding substrate, can be wound into required disc electrodes of different diameter sizes and thickness sizes according to air duct requirements, which is easy to operate and inexpensive.③The disc-shaped collection electrode can be matched perfectly with the circular air duct. When the rectangular collection electrode is matched with the circular fan air duct, a "round-to-square" flow adapter is required for connection. Even so, the wind speeds, static pressures, and flow fields between various electrode plates of rectangular collection electrodes are different, which results in an inconsistent purification efficiency. Although the above disc-shaped collection electrode has such advantages, the disc-shaped collection electrode is still not widely used. Through long-term testing, the inventor of the present disclosure found that the core issue affecting the dust collection efficiency and the assembly process relies on how to ensure uniform and equal spacing between winding layers. Only uniform and equal spacing can form a balanced and stable working electric field. Under the premise of not affecting the electric field strength, the thickness of the winding layer substrate itself is very thin (generally 0.1~0.5mm). After multiple layers of winding and extrusion, it is difficult to ensure the spacing between the two electrodes, which often results in issues such as flattening and stacking. For this reason, there are three conventional solutions as follows. ① Melt adhesive: as shown in FIG. 1, when two adjacent electrostatic dust collection sheets are spirally wound and molded by using a specific tooling, an appropriate amount of hot melt adhesive 100 is added from its side surface when maintaining the spacing; and after the hot melt adhesive 100 is cooled and cured, it can play a role of fixing the spacing of electrostatic dust collection. Drawbacks are as follows: <1> the specific tooling itself for maintaining spacing is more complex, and it has a