An electret corrugated dust collecting electrode and a manufacturing method thereof

Abstract

The present invention discloses an electret corrugated dust collecting electrode and a manufacturing method thereof. The electret corrugated dust collecting electrode comprises a corrugated core and a planar core; the planar core is a permanent body structure, the corrugated core and the planar core are stacked, and a gas channel is formed between the corrugated core and the planar core. The electret corrugated dust collecting electrode of the present invention can form electrostatic dust collection for the gas passing through, achieve an electrostatic dust removal effect, and realize flexible use in an environment without a high-voltage power supply.

Description

Technical Field

[0001] The invention belongs to the technical field of dust collecting electrodes, and in particular relates to an electret corrugated dust collecting electrode and a manufacturing method thereof. Background Art

[0002] At present, the traditional HEPA (High Efficiency Particle Air) filter used in air conditioners may cause a sharp drop in air volume, which seriously affects the energy efficiency performance of air conditioners, because the high resistance characteristics of the HEPA filter do not match the characteristics of the cross-flow fan commonly used in air conditioners. At the same time, IFD (Intense Field Dielectric) dust collecting electrodes are often used for air conditioners with dust removal functions. However, IFD dust collecting electrodes are only suitable for newly installed dust removal devices and are used in places where it is inconvenient to install high-voltage power supplies, such as already renovated central air conditioning systems, ordinary air conditioners and ventilation devices. Summary of the invention

[0003] In view of the above problems, the present invention discloses an electret corrugated dust collecting electrode and a manufacturing method thereof, so as to overcome the above problems or at least partially solve the above problems.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] An electret corrugated dust collecting electrode comprises a corrugated core and a planar core; the planar core is a permanent body structure, the corrugated core and the planar core are stacked, and a gas channel is formed between the corrugated core and the planar core.

[0006] Preferably, the planar core is a hollow structure biaxially oriented polypropylene film with embossing on one side, and contains no antistatic agent but inorganic particle filler.

[0007] Further preferably, the embossing of the planar core is arranged along a direction perpendicular to the gas channel.

[0008] Further preferably, the embossing of the planar core is parallel lines with equal spacing.

[0009] Preferably, at least one surface of the corrugated core is provided with embossing.

[0010] Further preferably, the embossing of the corrugated core is arranged in a direction perpendicular to the gas channel.

[0011] Further preferably, the embossing of the corrugated core is parallel lines with equal spacing.

[0012] Further preferably, it comprises a plurality of the corrugated cores and a plurality of the planar cores, and the corrugated cores and the planar cores are alternately stacked and arranged.

[0013] A method for making an electret corrugated dust collecting electrode is used to make the electret corrugated dust collecting electrode described in any one of the above. The specific operation is: the corrugated core and the planar core are stacked and fixedly connected, and cut in a direction perpendicular to the gas channel to obtain a sheet-like electret corrugated dust collecting electrode with a certain thickness.

[0014] Preferably, the corrugated core and the planar core are both made of a low-melting-point film material, and after the corrugated core and the planar core are stacked and placed, they are cut by hot-melt cutting to obtain a sheet-like electret corrugated dust collecting electrode with a certain thickness.

[0015] In the electret corrugated dust collecting electrode of the present invention, a corrugated core and a planar core are stacked to form a gas channel for gas to pass through between the corrugated core and the planar core, and the planar core is designed as a permanent body structure, so that electrostatic dust can be collected on the passing gas, achieving an electrostatic dust removal effect and realizing flexible use in an environment without a high-voltage power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0017] Figure 1 It is a schematic diagram of the partial appearance structure of the electret corrugated dust collecting electrode in this embodiment along the first viewing angle;

[0018] Figure 2 It is a schematic diagram of the partial appearance structure of the electret corrugated dust collecting electrode along the second viewing angle in this embodiment. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Combination Figure 1 and Figure 2 As shown, the present invention discloses an electret corrugated dust collecting electrode, comprising a corrugated core 1 and a planar core 2. The planar core 2 is a permanent body structure, the corrugated core 1 and the planar core 2 are stacked, and a gas channel 3 is formed between the corrugated core 1 and the planar core 2 for gas to pass through the electret corrugated dust collecting electrode.

[0021] At this time, by stacking the corrugated core and the planar core, the corrugated core is used to support and fix the planar core, thereby forming a gas channel for gas to pass through between the corrugated core and the planar core, and the planar core is designed as a permanent body structure, so that electrostatic dust can be collected on the passing gas, thereby achieving an electrostatic dust removal effect and realizing flexible use in an environment without a high-voltage power supply.

[0022] In the electret corrugated dust collecting electrode of this embodiment, a plurality of corrugated cores 1 and a plurality of planar cores 2 are provided, and the corrugated cores 1 and the planar cores 2 are alternately stacked and arranged, thereby forming an electret corrugated dust collecting electrode with a certain dust removal area. In different embodiments, according to different application environments of the electret corrugated dust collecting electrode, the number and specific shapes of the corrugated cores and the planar cores can be adjusted to meet the use of different environments.

[0023] Preferably, in the present embodiment, the plane core adopts a hollow structure biaxially stretched polypropylene film with embossing on one side, and contains no antistatic agent but inorganic particle filler. At this time, by selecting the biaxially stretched polypropylene film as the plane core, not only can the inorganic particles induce the formation of a "lens"-like structure during the stretching process, so that a plurality of the "lens" structures are distributed in different positions to form a similar "thousand-layer cake" structure, so that in the process of electret charging, since the "lens" structure is similar to a flat plate capacitor, it can play a role in preserving charge, and a plurality of the structures in the film can be approximately equivalent to a plurality of parallel plate capacitors in series, and the electret corrugated dust collecting electrode can also be washed, and the filtering performance can still be well restored after the water evaporates, thereby meeting the use in a high humidity environment and improving the use efficiency and effect.

[0024] Specifically, the thickness of the planar core 2 is about 30-350 μm, the height of the embossing 21 is 20-200 μm, and the embossing 21 is arranged in a direction perpendicular to the gas channel 3, while the plane is provided with a pearlescent film. At this time, the embossing can improve the dust collection effect, increase the dust holding capacity, extend the replacement and maintenance time, and obtain better use effect.

[0025] At the same time, the two surfaces of the corrugated core 1 of this embodiment are also provided with embossings 11, and the height of the embossings 11 is also 20 to 200 μm and is arranged in a direction perpendicular to the gas channel 3. In this way, by also providing embossings on the surface of the corrugated core, the dust collection effect and dust holding capacity of the electret corrugated dust collecting electrode can be further improved, thereby improving the use effect.

[0026] Of course, in other embodiments, the height of the embossing and the embossing setting on the corrugated pattern may be adjusted according to usage requirements and manufacturing conditions, such as embossing on a single side, so as to meet corresponding usage requirements and effects.

[0027] Furthermore, in the present embodiment, the embossing on the corrugated core and the embossing on the plane core are both designed with equally spaced parallel lines, wherein the embossing spacing is 100 μm to 1000 μm, which facilitates the production of the corrugated core and the plane core, reduces the production difficulty, and improves production efficiency and quality. Of course, in other embodiments, the design structure of the embossing may also be adjusted and changed, such as designing the embossing as a non-equally spaced parallel line structure, and gradually increasing the embossing spacing along the direction in which the gas passes through the gas channel. In this way, while the embossing at the front end of the gas channel completes most of the dust collection purpose, the flow resistance of the gas at the tail end of the gas channel can be reduced, thereby improving the smoothness of the gas passing through the electret corrugated dust collecting electrode. Even in other embodiments, the embossing may be designed as a non-parallel structure, such as a mutually crossed structure, and the like.

[0028] In addition, in the present embodiment, both the corrugated core 1 and the planar core 2 are made of a low melting point film material, such as a polypropylene film. At this time, in the process of making the electret corrugated dust collecting electrode in the present embodiment, the corrugated core and the planar core can be stacked and placed first, and then the stacked corrugated core and the planar core can be cut by hot melt cutting, so that while the sheet-like electret corrugated dust collecting electrode with a certain thickness is obtained by hot melt cutting, the contact position of the corrugated core and the planar core can also be hot-melt fixed, so that the corrugated core and the planar core can be fixed and cut at one time by using this manufacturing method, which greatly improves the manufacturing efficiency of the electret corrugated dust collecting electrode.

[0029] Of course, in other embodiments, the corrugated core can also be made of polyethylene film, and the corrugated core and the plane core can be stacked and fixedly connected in advance, and then cut in a direction perpendicular to the gas channel according to different use environments to obtain a sheet-like electret corrugated dust collecting electrode with a certain thickness.

[0030] Next, the dust collection efficiency of the above-mentioned electret corrugated dust collecting electrode proposed by the present invention is tested and compared under different working conditions.

[0031] Among them, in the electret corrugated dust collecting electrode of the embodiment, the corrugated core adopts a textured polypropylene homogeneous film, the groove spacing is about 500μm, the groove width is about 500μm, the film thickness is 300μ, the embossing protrudes from the film substrate by about 60μm, and the corrugated core is about 1.5mm high; the flat core adopts a hollow structure biaxially stretched polypropylene film with embossing on one side and does not contain an antistatic agent but contains inorganic particle filler, and the density is about 0.6g / cm 3The film thickness is about 200μm, and one side is covered with embossing of about 150μm thickness, the spacing between the embossing is about 500μm, the width of the embossing is about 50μm, and the embossing protrudes from the film substrate by about 50μm. Among them, the corrugated core and the flat core are stacked and pressed alternately, and hot-melt cutting is performed using a 0.4mm diameter nickel-chromium electric heating wire, and the electric heating wire feed speed is 1.5mm / s to cut through it, and the electret corrugated dust collecting electrode with a sheet thickness of 10mm and the electret corrugated dust collecting electrode with a sheet thickness of 20mm are obtained respectively. At the same time, the corona charging voltage of the electret corrugated dust collecting electrode is 45kv, and the time is 30s.

[0032] The comparative example uses 3M brand HAF electrostatic air filter with a medium wave height of about 1.5mm, and the sheet thickness specifications are 10mm and 20mm respectively.

[0033] Test 1: The dust collection efficiency of the embodiment and the comparative example was tested at a surface wind speed of 0.1 m / s and containing dust of different particle sizes, and the test results shown in Table 1 were obtained:

[0034] Table 1

[0035]

[0036] Test 2: The dust collection efficiency of the embodiment and the comparative example was tested at a surface wind speed of 1 m / s and containing dust of different particle sizes, and the test results shown in Table 2 were obtained:

[0037] Table 2

[0038]

[0039] It can be seen from Table 1 and Table 2 that for gases containing dust of the same particle size (0.5μm, 1μm, 2.5μm or 5μm), when the same surface wind speed (0.1m / s or 1m / s) passes through the electret corrugated dust collecting electrode in the embodiment and the HAF electrostatic air filter in the comparative example respectively, under the condition of the same thickness specifications, the electret corrugated dust collecting electrode in the embodiment obtains better dust collection efficiency and achieves better dust collection effect.

[0040] Test 3: The dust collection efficiency of the gas at a surface wind speed of 1 m / s and containing dust with a particle size of 2.5 μm was tested on the embodiment and the comparative example after being immersed in water for different times for 10 minutes and then fully dried, and the test results shown in Table 3 were obtained:

[0041] Table 3

[0042]

[0043] As shown in Table 3, it can be seen that in the dust collection efficiency tests after the electret corrugated dust collecting electrode in the embodiment and the HAF electrostatic air filter in the comparative example were immersed in water and dried for different times, under the condition of the same thickness specifications, the electret corrugated dust collecting electrode in the embodiment obtained better dust collection efficiency, and the electret corrugated dust collecting electrode with a thickness of 10 mm and a thickness of 20 mm after 3 times of immersion and drying treatment, in the dust collection efficiency test for gas with a surface wind speed of 1 m / s and containing dust with a particle size of 2.5 μm, still obtained efficiencies of up to 7% and 17% respectively, and had higher filtration efficiency in a high humidity environment and after rinsing with clean water.

[0044] The above is only a specific embodiment of the present invention. Under the above teachings of the present invention, those skilled in the art can make other improvements or modifications on the basis of the above embodiments. Those skilled in the art should understand that the above specific description is only to better explain the purpose of the present invention, and the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. An electret corrugated dust collecting electrode, characterized in that: It comprises a corrugated core and a planar core; the planar core is a permanent electric structure, the corrugated core and the planar core are stacked, and a gas channel is formed between the corrugated core and the planar core; The planar core is a hollow biaxially stretched polypropylene film with embossing on one side, and contains no antistatic agent but inorganic particle filler; wherein the thickness of the planar core is 30 to 350 μm, the height of the embossing of the planar core is 20 to 200 μm, and the plane of the planar core is provided with a pearlescent film; The embossing of the planar core is arranged in a direction perpendicular to the gas channel; The embossing of the planar core is parallel lines with equal spacing; At least one surface of the corrugated core is provided with embossing; wherein the height of the embossing of the corrugated core is 20 to 200 μm; The embossing of the corrugated core is arranged in a direction perpendicular to the gas passage; The embossing of the corrugated core is parallel lines with equal spacing; The embossing pitch of the planar core is 100 μm to 1000 μm, and the embossing pitch of the corrugated core is 100 μm to 1000 μm; It includes a plurality of the corrugated cores and a plurality of the planar cores, and the corrugated cores and the planar cores are alternately stacked and arranged.

2. A method for manufacturing an electret corrugated dust collecting electrode, characterized in that: The production of the electret corrugated dust collecting electrode as described in claim 1 is specifically performed by stacking and fixing the corrugated core and the planar core, and cutting them in a direction perpendicular to the gas channel to obtain a sheet-like electret corrugated dust collecting electrode with a certain thickness.

3. The method for making the electret corrugated dust collecting electrode according to claim 2, characterized in that: The corrugated core and the planar core are both made of a low-melting-point film material, and after the corrugated core and the planar core are stacked and placed, they are cut by hot-melt cutting to obtain a sheet-like electret corrugated dust collecting electrode with a certain thickness.

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