RU205185U1 - INDIVIDUAL FUELING DEVICE FOR AUTOMOTIVE TRANSPORT - Google Patents

Abstract

The utility model relates to the gas industry, namely, to an individual device for refueling motor vehicles with compressed natural gas. An individual device for refueling motor vehicles, including a housing with an air inlet and outlet, containing a multistage gas compressor driven by an electric motor, a drying unit, condenser, gas inlet pipeline, gas supply pipeline for refueling vehicles, air blower, temperature sensor of the incoming air flow installed on the housing at the atmospheric air inlet, main logic controller, power supply, additionally equipped with a means for heating the air, located in series in the direction of travel of atmospheric air after the fan, by an outlet air temperature sensor installed on the housing at the outlet of atmospheric air, and the means for heating the air and the outlet air temperature sensor are connected to an electrical central The proposed technical solution makes it possible to ensure the possibility of failure-free operation of the device, to increase the reliability of the compressor and drive in conditions of negative ambient air temperature due to the introduction of air heating means. 2 c.p. f-ly, 1 dwg.

Description

The utility model relates to the gas industry, namely, to an individual device for refueling motor vehicles with compressed natural gas.

An individual device for refueling motor vehicles (hereinafter referred to as IU) can be operated both indoors and outdoors, for example, in the open area of a private residential building.

The closest to the claimed utility model in technical essence and taken as a prototype is a device for refueling cars with gaseous fuel, which includes a housing containing a multistage gas compressor driven by an electric motor, an opening for gas inlet into the device, an opening for gas outlet, a drying unit, a condenser, a ventilation system including an opening for inlet of atmospheric air, a fan and an opening for removing atmospheric air to the atmosphere, a gas sensor located near the opening for an outlet of air and designed to detect a flammable gas passing through the ventilation system, an air flow temperature sensor located near the opening for atmospheric air inlet, monitoring and control elements connected to a central control system having a main logic controller, a power supply (RF patent No. 2322637, IPC: F17C 5/00, published: 20.04.2008).

During the operation of the prototype device, fire and explosion safety is ensured by continuous blowing of the housing with atmospheric air under excess pressure by means of the fan operation. At the same time, purging the IU housing with atmospheric air provides the required thermal mode of operation of the electric motor and gas compressor. In normal mode, the selected prototype operates at ambient temperatures not lower than minus 25 degrees Celsius. For operation in harsher conditions, additional measures must be taken to ensure operability and to protect the equipment from freezing. Starting the DUT under negative ambient temperatures can cause serious breakdowns and damage to the drive motor.

The disadvantage of the prototype is that in conditions of negative ambient temperatures, cold atmospheric air supplied to the housing by operating the fan at a flow rate required to ensure explosion and fire safety can cause an unacceptable decrease in temperature in the IU housing. Subzero ambient temperatures can also disrupt the operation of a multistage gas compressor. When natural gas is compressed, condensate is created, which can freeze at negative ambient air temperatures, which can lead to failure of the gas compressor and emergency shutdown of the IU.

Another disadvantage of the prototype is that the constituent elements are often clogged due to the drawing inside the device with atmospheric air of dust particles, insects, etc., which in turn leads to overheating of the constituent parts and early metal corrosion.

The problem to be solved by the proposed utility model is the safe start-up of the IU in conditions of negative ambient air temperatures and the maintenance of the specified temperature characteristics in the IU case to ensure the stable operation of the gas compressor and the drive motor.

The technical result consists in increasing the reliability of the IU operation, ensuring the safe start of the IU at negative temperatures of atmospheric air.

The technical result is achieved by organizing the heating of the supplied atmospheric air into the IU housing at negative temperatures of atmospheric air to a temperature that allows launching and trouble-free operation.

The technical result is achieved by the fact that the IU includes a housing with an air flow inlet and outlet, containing a multistage gas compressor driven by an electric motor, a drying unit, a condenser, a gas inlet pipeline, a gas supply pipeline for refueling vehicles, a blower for air, an inlet temperature sensor. air flow installed on the case at the atmospheric air inlet, the main logic controller, the power supply, additionally equipped with a means for heating the air, located in series in the direction of atmospheric air flow after the fan, an outlet air temperature sensor installed on the case at the atmospheric air outlet and connected by electrical circuits with the main logic controller.

This technical solution will allow:

- to ensure the operability of the equipment at ambient temperatures below minus 25 degrees Celsius;

- to increase the reliability of the constituent elements, by ensuring the permissible temperature regime inside the case.

The distinguishing features of "air heater" and "outlet air temperature sensor" are essential.

Installation in the IU housing of a means for heating air, for example, a heating element, a heating cable, a fan heater, located in series in the direction of atmospheric air flow after the fan and an air temperature sensor installed on the housing near the atmospheric air outlet, will increase the reliability of the IU operation at negative ambient temperatures. ...

Synchronization, by means of the main logic controller, the air flow temperature sensor installed on the housing at the atmospheric air inlet, the air flow temperature sensor installed on the housing at the air flow outlet, the air heating device and the air blower allows you to turn on, turn off and adjust the heating power of the device air heating to ensure that the required operating air temperature is maintained in the IU housing.

In addition, to further increase the operational reliability, the DUT may contain an air purification filter installed in front of the atmospheric air inlet into the housing.

Installation of an air purification filter before the entry of atmospheric air into the housing will eliminate the ingress of dust particles, flies, snow, dirt into the housing, thereby ensuring good heat removal from the housing of the electric motor and gas compressor, and increasing the service interval by ensuring cleanliness inside the housing.

Also, for an additional increase in the reliability of the device, the case of the IU can be made of a composite sound-absorbing material that performs the function of thermal protection, as well as reducing the noise level from the operation of the compressor.

The construction of the housing made of a composite sound-absorbing material will increase the thermal protection of the IU and reduce the noise level transmitted from the compressor operation.

The device is illustrated by a diagram showing the following position designations:

1 - housing, 2 - air flow inlet, 3 - air flow outlet, 4 - multistage compressor, 5 - drive motor, 6 - drying unit, 7 - condenser, 8 - gas inlet pipeline, 9 - gas supply pipeline, 10 - fan air boost, 11 - incoming air temperature sensor, 12 - main logic controller, 13 - power supply, 14 - air heating means, 15 - outlet air temperature sensor, 16 - air filter.

The device works as follows.

When starting the IU from the power supply 13, if the temperature sensor 11 of the incoming air flow detects that the air temperature is below a predetermined minimum limit value, the main logic controller 12 gives a signal to turn on the means 14 for heating the air and the fan 10 for boosting air to heat the incoming air. through the inlet 11 of the air flow in the housing 1. The warm air flow passing through the housing 1 heats the housing of the multistage compressor 4 and the housing of the drive motor 5 and is discharged into the atmosphere through the outlet 3 of the air flow. When the optimal thermal mode of operation is reached, determined by the outlet air temperature sensor 15, installed near the air outlet 3 from the housing 1, the main logic controller 12 issues a signal to start the electric motor 5, while the multistage compressor 4 begins to compress the gas and through the gas supply line 9 for refueling the vehicle is refueling the vehicle cylinder. The air temperature is constantly monitored by temperature sensors 11, 15, and the data is transmitted to the main logical controller 12. Based on the received data, the main logical controller 12 controls the heating power of the air heating means 14, thereby ensuring the optimal thermal regime inside the housing 1.

According to the calculations performed to determine the required power of the heater, it was revealed that to heat the air from -25 ° C to -20 ° C at an air flow rate of 600 m ³ / h, it is necessary to use a heater with a capacity of at least 1 kW. If the air temperature reaches -35 ° C, it is necessary to use a heater with a capacity of at least 3 kW. These parameters have been confirmed by tests carried out on a mock-up.

The proposed technical solution makes it possible to ensure the possibility of failure-free operation of the IU, to increase the reliability of the compressor and drive in conditions of negative ambient air temperature due to the introduction of air heating means.

Claims (3)

1. A device for refueling motor vehicles, including a housing with an air inlet and outlet, containing a multistage gas compressor driven by an electric motor, a drying unit, a condenser, a gas inlet pipeline, a gas supply pipeline for refueling vehicles, a blower for air, a temperature sensor incoming air flow, installed on the housing at the inlet of atmospheric air, the main logic controller, a power supply, characterized in that it additionally contains a means for heating the air located in the direction of the atmospheric air after the air blower fan, and an outlet air temperature sensor installed on the housing at the outlet of atmospheric air, connected by an electrical circuit with the main logic controller. 2. The device according to claim 1, characterized in that it contains an air purification filter installed before the inlet of atmospheric air into the housing. 3. The device according to claim 1, characterized in that the body is made of a composite sound-absorbing material.

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