SU1111890A1 - Ventilation device for vehicle cabin - Google Patents

Abstract

1. VENTILATION DEVICE OF THE VEHICLE CABIN, containing an air duct in the upper part of the cabin, an inertial grille installed at the inlet of the duct and having a suction port and air inlet, a filter installed behind the inertial grille and a fan with an air distributor installed behind the filter, distinguished that, in order to increase the efficiency of air purification by providing the optimal speed of air passing through the inertial grid by periodically cleaning the inverse filter filter, the inertial grille are spaced apart, and the cavity between them is connected by a hole in the lower part to the dust suction channel, the first damper is installed in the air intake, and the second damper is placed in the lower hole with the possibility of alternately blocking the dust suction channel from the inertial grid and the lower one holes.

Description

2. The device according to claim 1, 1 of which is, so that, in order to ensure the automation of the return filter purge, it is equipped with a speed sensor mounted on

the outlet of the air distributor and connected to the control unit; the dampers are equipped with actuators connected to the control unit.

The invention relates to the technique of ventilation and air supply and can be used in the cabs of vehicles for mainly agricultural purposes in universal tillage tractors, grain harvesting, corn harvesters, heavy vehicles, etc. The closest technical solution to the invention is the ventilation device of the vehicle cabin, which contains an air duct in the upper part of the cab, an inertial grille installed at the inlet of the duct and having a suction channel Piti and air intake, a filter installed behind the inertial grille and a fan with an air distributor. mounted behind the filter 1 j A disadvantage of the known device is the lack of periodic cleaning of the filter by reverse air blowing, which reduces the operating time of the filters. tra and it requires maintenance or replacement. In addition, when operating in a dusty environment, the filter gradually becomes clogged with fine dust and its aerodynamic drag increases. With an increase in the filter resistance, the performance of the fan decreases and decreases the air flow rate, and, accordingly, the flow rate in the inertial grid. When the flow rate decreases, the efficiency of the inertial grid decreases. That is, a change in the filter resistance leads to a change in the characteristics of the entire air dedusting system and first of all reduces the efficiency of the inertial grid, which leads to an increase in the dust concentration at the filter inlet and to a decrease in the efficiency of air cleaning, the purpose of the invention is to increase the efficiency of air purification by ensuring optimum air flow rate through the inertia grid due to the periodic cleaning of the filter by back-blowing. The goal is achieved by the fact that in the ventilation device of a vehicle, which contains an air duct in the upper part of the cab, an inertial grille installed at the inlet of the duct and having a dust suction channel and air intake, a filter installed behind the inertial grille and a fan with an air distributor installed behind the filter , the filter and the inertial grille are spaced apart, and the cavity between them is connected by a hole in the lower part with a dust suction channel, the first damper is installed in the air intake, and in the lower part hole and placed the second damper with the possibility of alternately blocking the suction channel PTI, respectively, from the inertial grid and from the lower hole. In addition, it is equipped with a speed sensor installed at the outlet of the air distributor and connected to the control unit, the dampers are equipped with actuators connected to the control unit. FIG. 1 shows a diagram of the device in the working position when the cabin is vented; in fig. 2 is a view A of FIG. 1 | in fig. 3 is a diagram of the device when cleaning the filter. The device comprises an air duct 1 having an extension at the inlet 2, a narrowed part 3 and an extension at the outlet 4. In the expansion at the inlet 2 a filter 5 is installed and an inertia grille 6 with an air intake 7 and a channel 8 for dust extraction. In expansion at outlet 4, a heat exchanger 9 is installed, an air cooler and a fan 10 with an air distributor 11, a fan 10. Is driven by an electric motor 12, Above the narrowed part of the duct 3 a condenser heat exchanger 13 and a fan 14, for example of axial type, are installed. In the upper part of the expansion at the inlet 2, an opening 15 is made and a damper 16 is installed, driven by an electromagnet 17. The valve has two positions. In the first position, the valve closes the entrance to the nozzle 18, in the second position, the valve closes the entrance to the inertia grid, opens the entrance to the nozzle 18 and closes the opening 15. In the lower part of the expansion, an opening 19 is made at the extension 2 and the valve 20 is installed with an electromagnet 21 drive In the first position, the flap closes the opening 19, in the second position 22 it closes the exit from the inertia grid 6 into the channel 8 for sucking the drain. At the outlet of the distributor 11I installed sensor, 23 air speed. The sensor 23 is connected to the control unit 24. The control unit is connected to the electromagnets 17 and 21. The refrigerant from the compressor of the refrigerating machine is supplied through the conduit 25 to the condenser 13. The refrigerant vapor from the air cooler 9 is sucked off from the conduit 26. The device operates as follows. The dusty air through the airborne wort 7 enters the inertial grid 6. When the direction of movement of the particle is shifted by the action of inertial forces, the dust extracts into the channel 8, and the air is blown away, for example, by ejecting the engine exhaust or an additional fan. The air cleared of coarse dust enters the hole 15 and then through the pipe 18 and the condenser 1.3 into the fan 14, which throws it out. Part of the cleaned air enters through the filter 5, where air purification is carried out, and the heat exchanger 9 to the fan 10. From the fan 10, air passes through the air distributor 1 to the car cabin. When the chiller works, the air is additionally cooled in the heat exchanger 90 ke 9, which allows the driver to maintain comfortable working conditions in the cab. . Poi clogging of the filter 5 with fine dust increases its resistance and decreases the performance of the fan 10, i.e. the discharge in the inlet expansion 2 is reduced. This reduces the energy consumption in the fan 14 and increases its performance by an amount sufficient to maintain the required flow rate and air cleaning efficiency in the inertia grille 6. Thus, the air cleaning efficiency is kept constant. inertial lattice for a sufficiently large period of time. The decrease in the performance of the fan 10 leads to a decrease in the flow rate at the outlet of the distributor 11 and a decrease in the signal of the air velocity sensor 23. The control unit 24 outputs a signal to the electromagnets 17 and 21. The damper 16 closes the air intake 7. The damper 20 rotates to position 22. At the same time, the passage of dusty air into the inertia grill 6 and the exhaust of air from it is blocked. In addition, the control unit 24 shuts off the fan 10. Under the action of suction through channel 8, air from the cabin through fan 10, heat exchanger 9 and filter 5 flows through opening 19 into channel 8 of dust suction. At the same time, the working surface of the filter 5 is cleaned by the action of a reverse air blowing and dust is removed to the dust suction channel 8. In order to ensure the normal operation of the Refrigerator during this period, it does not turn off. In this case, the condenser 13 is temporarily blown with dusty air entering through the air intake 7 and the pipe 18. After a certain period of time, the control unit turns on the fan 10 and sends a signal to the electromagnets 17 and 21. At the same time, the valves 16 and 20 are set to the working position for ventilation the cabin and the device provides air supply to the cabin. The use of the invention allows to increase the efficiency of air purification and automate the filter backwash as it becomes clogged.

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Claims (2)

1. VENTILATION DEVICE OF THE VEHICLE CABIN, containing an air duct in the upper part of the cab, an inertial grate installed at the inlet of the air duct and having. dust suction channel and air intake, filter installed behind inert An OS with an oration grid and a fan with an air distributor installed behind the filter, characterized in that, in order to increase the efficiency of air purification by ensuring the optimal speed of air passage through the inertia grill due to periodic cleaning of the filter by reverse purging, the filter and the inertia grill are separated, and the cavity between them is connected by an opening in the lower part with a dust suction channel, and the first damper is installed in the air intake, and the second damper is placed in the hole with it; The leg covering of the dust suction duct, respectively, of the inertia of the lattice and the lower opening in n izhzaslon over- Φι / tJ 2. The device according to claim 1, characterized in that, in order to ensure automation of the reverse purge of the filter, it is equipped with a speed sensor installed at the outlet of the air distributor and connected to the control unit, the shutters are equipped with actuators with ‘connected to the control unit.