CN-114984684-B - Air filter screen

CN114984684BCN 114984684 BCN114984684 BCN 114984684BCN-114984684-B

Abstract

The invention discloses an air filter screen, which comprises a filter screen and a filter screen detection body, wherein the filter screen detection body is arranged on the back surface of the filter screen, the filter screen detection body comprises a frame body and a detection line, the detection line is fixed on the frame body and is connected with an external circuit, the detection line comprises an electric heating wire and an insulating layer, and the electric heating wire is coated by the insulating layer. The invention adopts the filter screen detection body to detect whether the filter screen is full of dust, can meet the actual influence on the filter screen under different air quality, ensures that the filter screen can be really replaced after the service life is reached, has better timeliness, and has the advantages of repeated use, simple molding, simple use and high economical efficiency.

Inventors

SHEN ZHANXIN
LU WEIYING
WU WENJUN
CHEN LIWEI

Assignees

厦门阿匹斯智能制造系统有限公司

Dates

Publication Date: 20260505
Application Date: 20220627

Claims (9)

1. The air filter screen is characterized by comprising a filter screen and a filter screen detection body, wherein the filter screen detection body is arranged on the back surface of the filter screen, the filter screen detection body comprises a frame body and a detection line, the detection line is fixed on the frame body and connected with an external circuit, the detection line comprises an electric heating wire and an insulating layer, the electric heating wire is coated by the insulating layer, the filter screen detection body continuously heats when being electrified in operation, then air passing through an air purifying system and fresh air purifying system dissipates heat, the resistance of the detection line is obviously changed when the temperature of the detection line rises or falls, and the filter screen is judged whether the filter screen is full or not by detecting the change of the resistance because the clean filter screen and the full filter screen are different in size of the air passing through the detection line, so that the actual use state of the filter screen can be detected, the external circuit is a driving sampling circuit, the driving sampling circuit comprises a constant current circuit, a sampling circuit and an ADC circuit, a positive voltage output port and a negative voltage output port of the constant current circuit are respectively connected with one ends of the detection line and the sampling circuit, and the detection line are connected with the ADC circuit.
2. An airstrainer according to claim 1, wherein the winding lines of the detection lines are arranged in the frame for fixing.
3. An airstrainer according to claim 1, wherein said detection wires are folded in a grid within said frame.
4. An airstrainer according to claim 1, wherein the thickness of the filter detecting body is 2-3 mm.
5. An airstrainer according to claim 1, wherein said detection line is a microcrystalline heating wire, and said microcrystalline heating wire is made of microcrystalline glass as an insulating layer.
6. An airstrainer according to claim 1, wherein said heating wire is a ferrochrome aluminum electric round wire.
7. An airstrainer according to claim 6, wherein the radius of the iron-chromium-aluminum electrothermal round wire is 0.06-0.1 mm.
8. An airstrainer according to claim 1, wherein said detection lines are single, and a single said detection line is folded around within said frame.
9. An airstrainer according to claim 1, wherein the number of said detection lines is plural, and a plurality of said detection lines are folded around said frame to form a multi-detection loop.

Description

Air filter screen Technical Field The invention relates to an air filter screen. Background The main stream air purifying, fresh air purifying and air purifying systems in the market at present detect the dust fullness of the filter screen in an electronic timing/optical detection mode, wherein the electronic timing only roughly calculates the dust fullness period of the filter screen and cannot actually show whether the filter screen is truly full of dust, and the optical mode needs to arrange sensors in different areas of the filter screen to detect the dust fullness state, so that the structure is complex and the use cost is high. Disclosure of Invention In order to solve the above technical problems, an object of the present invention is to provide an air filter screen. The air filter screen comprises a filter screen and a filter screen detection body, wherein the filter screen detection body is arranged on the back surface of the filter screen, the filter screen detection body comprises a frame body and a detection line, the detection line is fixed on the frame body and is connected with an external circuit, the detection line comprises an electric heating wire and an insulating layer, and the electric heating wire is coated by the insulating layer. In a preferred embodiment, the winding line of the detection line is placed in the frame for fixing. In a preferred embodiment, the detection lines are folded in a grid shape in the frame body. In a preferred embodiment, the thickness of the filter screen detecting body is 2-3 mm. In a preferred embodiment, the detection line is a microcrystalline heating wire, and the microcrystalline heating wire uses microcrystalline glass as an insulating layer. In a preferred embodiment, the heating wire is an iron-chromium-aluminum electric round wire. In a preferred embodiment, the radius of the iron-chromium-aluminum electrothermal round wire is 0.06-0.1 mm. In a preferred embodiment, the detection lines are single, and the single detection line is folded in the frame body. In a preferred embodiment, the number of the detection lines is plural, and plural detection lines are folded in the frame body to form a multi-detection loop. In a preferred embodiment, the external circuit is a driving sampling circuit, the driving sampling circuit includes a constant current circuit, a sampling circuit and an ADC circuit, a positive voltage output port and a negative voltage output port of the constant current circuit are respectively connected with one ends of the detection line and the sampling circuit, and the detection line and the sampling circuit are connected to the ADC circuit. The invention adopts the filter screen detection body to detect whether the filter screen is full of dust, can meet the actual influence on the filter screen under different air quality, ensures that the filter screen can be really replaced after the service life is reached, has better timeliness, and has the advantages of repeated use, simple molding, simple use and high economical efficiency. Drawings In order to more clearly illustrate the technical solutions of the present invention, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art. Fig. 1 is a structural view of a screen detecting body of the present invention. Fig. 2 is a schematic diagram of the circuit connection of the present invention. Fig. 3 is a block diagram of one embodiment of the present invention. Detailed Description For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention. In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "righ