SU1492191A1 - Self-contained air conditioner - Google Patents

Abstract

The invention relates to a technique of ventilation and air conditioning. The aim of the invention is to increase the efficiency and reliability in operation at elevated ambient temperatures. The self-contained air conditioner comprises a housing 1 with evaporative and condensing units 2 and 3 located therein, the latter of which has an air-cooled condenser 4 and a heat accumulator 5, made in the form of a heat-insulated casing 6, in which the heat-accumulating substance 7 and the bundle of tubes 8 are located. The condenser is made in the form of a bundle of tubes 19 connected in pairs with the tubes 8 of the bundle of heat accumulator 5 and forming with them a common flow coil 20, which is located inclined towards the heat accumulator 5. The increase in the ambient air temperature makes it possible to stop the drive 22 of the fan 18, which blows the condenser 4, and in this condition of the air conditioner the refrigerant condenses in the circuit 12 using the heat accumulator 5 located in it, which eliminates the harmful effect of the ambient air temperature rise on air conditioner in general. 1 hp ff, 1 ill.

Description

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The invention relates to the technique of ventilation and air conditioning and can be used, in particular, for air conditioning in the cabin of an overhead crane of a hot shop.

The purpose of the invention is to increase the efficiency and reliability of operation at a higher ambient temperature.

The drawing shows a schematic diagram of an autonomous air conditioner.

The self-contained air conditioner comprises a housing 1 with evaporative and compressor-condensing units 2 and 3 located therein, the latter of which has an air-cooled condenser 4 and a heat accumulator 5 made in the form of a heat-insulated casing 6, in which the heat-accumulating substance 7 and a bundle of tubes 8 are located The evaporator 9 and the condenser 4 are connected in series through the compressor 10 and the throttling element 11 to the refrigerant circuit 12, and the evaporation and compressor-condenser units 2 and 3 are connected to the input Nome, recycle and outlet nozzles 13 - 15 and to the inlet and outlet fittings 16 and 17 with the fans (shown schematically only fan 18, the capacitor 4). The capacitor 4 is made in the form of a bundle of tubes 19, connected in pairs with the tubes 8 of the bundle of heat accumulator of the torus 5 and forming with them a common flow coil 20, which is located inclined towards the heat accumulator of the torus 5. The capacitor 4 can be equipped with a thermal relay 21 installed in its inlet 16 and connected to the drive 22 of the fan 18.

Autonomous air conditioner works as follows.

At a moderate ambient temperature (coming in on cooling condenser 4) of air and equal.

for example, 40-60 ° C, the compressor 10 circulates the refrigerant through the circuit 12 and the coil 20 located therein. The cooling air entering the evaporator 9 through its inlet 14 of the outside air (or simultaneously entering through the inlet 14 and recirculating pipe 13 of the mixture of external and recirculated votdu,

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ha), after which the cooled air through the outlet nozzle 15 is supplied to the consumer (for example, to the cabin of an overhead crane of the hot shop of the metallurgical industry). At the same time, the condenser 4 is blown by ambient air that is pumped through the inlet 16 of the condensing unit 3 by a fan 18. The heat accumulating substance 7 located in the casing 6 of the accumulator 5 has a melting point that is higher than the refrigerant condensation temperature for this mode air conditioner operation.

With a significant increase in the ambient air temperature, the corresponding signal from the thermostat 21 stops the drive 22 of the fan 18 of the condensing unit 3. In this condition of the air conditioner, the refrigerant circulating in the circuit 12 is condensed using the heat accumulator torus 5, which eliminates the harmful effect of increasing ambient temperature on the operation of the air conditioner as a whole.

After the conditioner (bridge crane) returns to a zone with a moderate ambient temperature, the heat accumulator 5 is regenerated with the compressor 10 stopped and the fan 18 turned on.

Each of the tubes 8 of the coil 20 operates in this mode as a thermal thermosyphon tube, the evaporation sections of which are a bundle of tubes 8 of the heat accumulator 5, and the condenser portions are a bundle of tubes 19 of the condenser 4. In addition, in this mode of operation of the air conditioner it is possible, if necessary the inclusion of the compressor 10 with a slight increase in the time of the regeneration process of the heat accumulator 5.

The arrangement of the coil 20 with a slope in the direction of the heat accumulator 5 contributes to the intensification of the heat exchange process between the heat accumulating substance and the cooling air flow blown into the condenser 4 by the fan 18.

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Claims (2)

1. A self-contained air conditioner, comprising a case with evaporative and compressor-condensing units located in it, the latter of which has an air-cooled condenser and a heat storage battery, insulated in the form of a heat-insulated casing in which a heat-accumulating substance and a beam are located tubes, the evaporator and the condenser are connected in series through the compressor and the throttling element into the refrigerant circuit, and the evaporation and compressor-condenser units with inlet and outlet air nozzles under 916 They are connected to the corresponding fans with drives, which differ from the fact that, in order to increase the efficiency and reliability of operation at a higher ambient temperature, the condenser is made in the form of a bundle of tubes connected in pairs to the tubes of the heat accumulator bundle and forming a common flow coil with them , located with a slope in the direction of the heat accumulator. 2. The air conditioner according to claim 1, which is based on the fact that the compressor-capacitor unit is equipped with a thermal switch installed in its air inlet port and connected to the drive of the corresponding fan.