Air filter protective device
An air filter and protection device technology, which is applied in the direction of dispersed particle filtration, chemical instruments and methods, and dispersed particle separation, can solve the problems of control failure, poor compatibility, and damage to the life of the air filter, and achieve the effect of protecting normal use
Active Publication Date: 2015-03-25
AIRSYS REFRIGERATION ENG TECH BEIJING
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Problems solved by technology
However, when using manual control, the accuracy of manual adjustment cannot be guaranteed because the user cannot accurately grasp the air pollution information; and when the secondary development of the detection data is performed based on a "third-party" chip or device through a program, the cost increases
Moreover, based on "third-party" chips or devices, the program may cause poor compatibility, which may damage the life of the air filter or cause control failure
Method used
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[0024] Such as figure 1 As shown, the air filter protector includes an interconnected dust sensor 200 and air filter protector 100 . The dust sensor 200 detects the concentration of dust or smog particles in the room, and the air filter protector 100 controls the opening and closing of the air filter connected to it according to the detection result. The advantage of the present invention is that the voltage signal output by the dust sensor 200 is converted into a control air The switching signal of the filter realizes the protection of the air filter through the circuit, and maximizes the use of outdoor fresh air to reduce carbon emissions.
[0025] Such as figure 2 Shown is a schematic diagram of the circuit principle of the dust sensor 200 , and an LED light IRED and a photodetector PD are arranged inside the dust sensor 200 . The light emitted by the LED lamp IRED is converged into a point through a lens, and a lens is also installed at the front end of the photodetecto...
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The invention provides an air filter protective device. The air filter protective device comprises a dust sensor and an air filter protector which are connected with each other, wherein the air filter protector comprises a dust concentration comparator, a first phase inverter, a pulse generator, a filtering comparator and a relay switch, wherein the dust concentration comparator is connected with the dust sensor, and is used for comparing a level signal transmitted by the dust sensor with a reference level, and outputting positive / negative pulse signals according to the comparative result; the first phase inverter is connected with the dust concentration comparator; the pulse generator is connected with the first phase inverter and is used for carrying out backward treatment on the pulse signal output by the first phase inverter; the filtering comparator is connected with the pulse generator for converting the output of the pulse generator into high and low levels; and the relay switch is connected with the filtering comparator and is used for performing switching action according to the output of the filtering comparator and controlling to open and close an air valve of the air filter. According to the air filter protective device, the voltage signal output by the dust sensor is converted into a switching quantity signal by a low-cost circuit, and the air filter can be controlled and is protected to be used normally.
Description
technical field [0001] The invention relates to the technical field of automatic control, in particular to an air filter protection device. Background technique [0002] The main functions of HVAC (Heating Ventilating and Air Conditioning) include: heating, filtered ventilation and temperature regulation. Corresponds to the heater, air filter and thermostat respectively. [0003] The purpose of the air filter includes reducing moisture, odor, smoke, bacteria and carbon dioxide in the area, and supplementing oxygen. Ventilation also involves the circulation of air within a building, avoiding stagnation of indoor air, and is one of the important factors in maintaining indoor air quality. [0004] The air filter of the existing HVAC is basically based on the manual control of the user, or based on the "third-party" chip or device through the secondary development of the detection data through the program, so as to operate. However, when using manual control, the accuracy of ...
Claims
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IPC IPC(8): B01D46/46
CPCB01D46/0086B01D46/442
Inventor 陈云水杨小龙吴波
Owner AIRSYS REFRIGERATION ENG TECH BEIJING