CN105582789A - Vehicle-mounted air dryer having humidity control apparatus - Google Patents

Abstract

The invention provides a vehicle-mounted air dryer having a humidity control apparatus. According to key factors of a technical scheme, the vehicle-mounted air dryer includes a humidity sensor being installed on an exhaust channel. A signal chip microcomputer regulates the time interval of cleaning and regeneration according to a humidity detection value. A second electromagnetic valve, as a guide control valve of a drainage valve, connects or disconnects an air channel between an air storage tank and the drainage valve. The signal chip microcomputer controls on/off of the second electromagnetic valve according to a humidity signal detected by the humidity sensor. By means of the humidity sensor for detecting and displaying the humidity in the air storage tank, a drying agent in a dryer cylinder is cleaned and regenerated, when the drying agent is failure, the system gives alarm in real time, thereby increasing accuracy and reliability of regulation. The air dryer reduces pressure fluctuation range of compressed air in the air storage tank, so that stable air supplement to a brake cylinder is ensured even without a balance valve. The air dryer is simple in structure, is low in manufacturing cost, is high in control precision, is reliable to use and has an excellent application prospect.

Description

A kind of air dryer for vehicle with humidity control apparatus

Technical field

The present invention relates to a kind of air dryer for vehicle with humidity control apparatus, belong to technical field of automobile parts.

Background technology

On motorbus or most of cargo vehicle, conventionally the power source using compressed air as service brake, steadily safe and effective for ensureing braking procedure, compressed air is except possessing certain pressure, also require compressed air to keep certain cleannes and drier, therefore, must carry out filtration drying processing to compressed air, for air degree of drying, can evaluate by humidity, humidity value is lower, illustrate that drying effect is better, from meeting application and economic angle, air humidity after treatment remains in certain scope all right, for example keep humidity range between 45-65%, in order to reach such target, will regulate control to drying device, control method is exactly regularly filtration drying cylinder to be carried out to cleaning and regeneration, once humidity exceeds applicable, illustrate that functions/drying declines, by the cleaning and regeneration to drier, make it recover functions/drying, the later drier of cleaning and regeneration still can not meet functions/drying, illustrate that drier lost efficacy, need to change drier. existing air dryer for vehicle adjusting device be not humidity according to air as foundation, cleaning and regeneration completed according to the solid mechanical cycle, therefore. the problem that existing air dryer for vehicle adjusting device exists is precisely to regulate, and degree of regulation is low, and air accumulator pressure oscillation scope is large, in air accumulator exit, balanced valve is set, and guarantee is to brake cylinder tight gas supply.

Summary of the invention

The present invention proposes to plant the air dryer for vehicle with humidity control apparatus, can improve the precision and the reliability that regulate, reduces air accumulator compressed air pressure oscillation scope, also can ensure to brake cylinder tight gas supply without balanced valve.

For this reason, technical scheme of the present invention is: a kind of air dryer for vehicle with humidity control apparatus, comprise drying, base, draining valve, the first magnetic valve, the first relay, pressure sensor, interface circuit, display and one-chip computer, drying, draining valve, the first magnetic valve, relay are all fixed on base, humidity sensor, air inlet one end connects outside air pressure pump, and the other end leads to drying, and the dried gas of drying cylinder enters air accumulator through exhaust outlet;

Pressure sensor is arranged on exhaust passage, and output signal accesses one-chip computer through interface circuit, and air accumulator pressure when pressure sensor ensures to clean is not less than setting value; The first magnetic valve is switched on or switched off the gas passage between air accumulator and drying, completes the cleaning and regeneration of drying, and the pressure signal that one-chip computer detects according to pressure sensor is controlled the break-make of the first magnetic valve by the first relay;

It is characterized in that:Also comprise humidity sensor, humidity sensor is arranged on exhaust passage, output signal accesses one-chip computer through interface circuit, output signal accesses one-chip computer through interface circuit, one-chip computer regulates the time interval of cleaning and regeneration according to Humidity Detection value, the second magnetic valve is as the pilot-actuated valve of draining valve, be switched on or switched off the gas passage between air accumulator and draining valve, the moisture signal that one-chip computer detects according to humidity sensor is controlled the break-make of the second magnetic valve by the second relay.

Beneficial effect: the present invention is detected, shown the humidity of air accumulator by humidity sensor, in real time the drier in drying is carried out to cleaning and regeneration, drier lost efficacy, report to the police in real time, pressure sensor detects, shows the pressure of air accumulator, improve the precision and the reliability that regulate, reduced air accumulator compressed air pressure oscillation scope, also can ensure to brake cylinder tight gas supply without balanced valve. The present invention is simple in structure, low cost of manufacture, control accuracy are high, and reliable operation, has broad prospect of application.

Brief description of the drawings

Accompanying drawing 1 is the air dryer for vehicle structural representation of band humidity control apparatus of the present invention.

Accompanying drawing 2 is air dryer for vehicle electric control theory figure of band humidity control apparatus of the present invention.

Detailed description of the invention

By reference to the accompanying drawings 1, it is as follows that accompanying drawing 2 further describes the present invention: a kind of air dryer for vehicle with humidity control apparatus, comprise drying 3, base 6, draining valve 4, the first magnetic valve 7 and the second magnetic valve 8, the first relay 9, pressure sensor 10, humidity sensor 11, interface circuit 12, display 13, one-chip computer 14, the second relay 15, drying 3, draining valve 4, the first magnetic valve 7, the second magnetic valve 8, the one 9 relay, the second relay 15 is all fixed on base, air inlet 5 one end connect outside air pressure pump, the other end leads to drying 3, the dried gas of drying cylinder enters air accumulator through exhaust outlet 1, pressure sensor 10, humidity sensor 11 are from air accumulator Information Monitoring, after one-chip computer 14 analyzing and processing, show pressure and the humidity value that air accumulator is current, in the time that humidity value reaches upper control limit (65%), sending instruction control the first magnetic valve 7 and the second magnetic valve 8 moves, the compressed air of air accumulator, be communicated with and open draining valve 4 with the plunger shaft A of draining valve through exhaust passage P, by the break-make of solenoid control gas circuit, realize the open and close of draining valve, meanwhile, the Partial shrinkage air of air accumulator refluxes through B mouth, and drier is carried out to cleaning and regeneration, in the time that cleaning and regeneration still can not ensure that compressed-air actuated aridity meets the demands, provides the alarm signal of changing drier, shown in accompanying drawing 1, wherein base 6 is that basis is installed, C mouth setting pressure sensor 10, and D mouth is installed humidity sensor 11.

Claims (1)

1. the air dryer for vehicle with humidity control apparatus, comprise drying, base, draining valve, the first magnetic valve, the first relay, pressure sensor, interface circuit, display and one-chip computer, drying, draining valve, the first magnetic valve, relay are all fixed on base, humidity sensor, air inlet one end connects outside air pressure pump, the other end leads to drying, and the dried gas of drying cylinder enters air accumulator through exhaust outlet;

Pressure sensor is arranged on exhaust passage, and output signal accesses one-chip computer through interface circuit, and air accumulator pressure when pressure sensor ensures to clean is not less than setting value; The first magnetic valve is switched on or switched off the gas passage between air accumulator and drying, completes the cleaning and regeneration of drying, and the pressure signal that one-chip computer detects according to pressure sensor is controlled the break-make of the first magnetic valve by the first relay;

It is characterized in that:Also comprise humidity sensor, humidity sensor is arranged on exhaust passage, output signal accesses one-chip computer through interface circuit, output signal accesses one-chip computer through interface circuit, one-chip computer regulates the time interval of cleaning and regeneration according to Humidity Detection value, the second magnetic valve is as the pilot-actuated valve of draining valve, be switched on or switched off the gas passage between air accumulator and draining valve, the moisture signal that one-chip computer detects according to humidity sensor is controlled the break-make of the second magnetic valve by the second relay.