SU1529188A1 - System for automatic control of refrigeration units - Google Patents

Abstract

The invention relates to refrigeration equipment and can be used to automatically control refrigeration units that consume electricity from a common diesel generator. The purpose of the invention is to reduce fuel consumption by ensuring the nominal load of the diesel generator. For this, the elements OR 17, HE 16 and AND 18 in the system of automatic control of refrigeration units provide, through magnetic actuators 19, 20, 21, the activation of engines 7, 13, 14 of compressors 5, 11, 12 of refrigeration units 4, 10, operating from a common diesel engine. generator 2, which allows for the nominal load of the diesel generator 2. 1 table.2 Il.

Description

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The invention relates to refrigeration technology and can be used for automatic control of refrigeration units that consume electricity from a common diesel generator in facilities with several, for example two, compressor units each, operating in parallel on one refrigeration unit, for example, car refrigerator sections.

The purpose of the invention is to reduce fuel consumption by ensuring the nominal load of the diesel generator.

FIG. 1 shows the block diagram of the proposed system; in fig. 2 - diagrams explaining the operation of the system.

The system for automatic control of refrigeration units comprises a diesel car 1 with a diesel generator 2, a refrigerator car 3, which houses a refrigeration unit 4, compressors 5 and 6, engine 7 of compressor 5 (engine of compressor 6 is not shown) and temperature sensor 8, refrigerator car 9, in which a refrigeration unit 10 with compressors II and 12, engines 13 and 14, and a temperature sensor 15, as well as an element NOT 16, an element OR 17, an element AND 18 and magnetic starters 19-21, is housed.

The system works in accordance with the table.

Let, starting from the moment of time TU (Fig. 2), the refrigerated wagon 3 is cooled by the compressor 5, and the refrigerated wagon 9 by the compressor 11. This mode corresponds to the fourth row of the table. In this case, the engine 14 is turned off, and the diesel generator 2 is on. Diesel generator 2 has a load of 2N (where N is the power of one compressor). When the set temperature in the first refrigerated car 3 is reached at time 2, the engine 7 of the compressor 5 is turned off by the signal from sensor 8. The signal "O from the output of the magical starter 19 goes to the element HE 16, from which the signal" 1 in. Along with the signal "1 from the output of the magnetic actuator 20 is fed to the input of the element 18. At the output of the latter, a signal is generated" 1, which turns on the magnetic actuator 21 of the engine 14, and the compressor 12 starts to work for cooling in the second refrigerated wagon 9. This mode corresponds to the second rock table.

Thus, the cooling rate of the air in the car 9 is increased. When the desired temperature in the refrigerator car 9 is reached, both compressors 11 and 12 are turned off by the signals from sensor 15 at time fj. Simultaneously disables

9188

four

with diesel generator 2, since the input signal of the element OR 17 receives two signals “O. This mode corresponds to the first row of the table. In the mode of operation, which corresponds to the third row of the table, the refrigerated wagon 3 is cooled by the operating compressor 5, and the refrigerated wagon 9 has a predetermined temperature. In this case, the engine 14 of the compressor 12 is not turned on. As seen from

10 of FIG. 2d, the non-working time of the diesel generator increased (fj) compared with the prototype () (Fig. 2, c), and the load of the diesel generator 2 during the working time (} - Тз) is closer to the nominal mode. In the next 15 control periods, the non-operating time of the diesel generator 2 (Fig. 2) increases and in the limit will be maximum with the synchronous shutdown of the compressors in the refrigerator cars. At the same time, the diesel generator is

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thirty

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45

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55

melts at rated loads.

The use of the invention provides a reduction in fuel consumption consumed by a diesel generator, as a result of an increase in non-working time, as well as ensuring the nominal load during working time.

Claims (1)

Invention Formula A system for automatically controlling refrigeration units comprising a diesel generator, two refrigerated cars, one of which has a temperature sensor connected by an output to the input of the first magnetic starter, and a refrigeration unit compressor connected to the diesel generator with an engine connected to the output of the first a magnetic starter and a compressor of a refrigeration unit connected to a diesel generator with an engine connected to the output of the first magnetic starter, and in the second one a refrigerating unit The car has a temperature sensor connected by the output to the input of the second magnetic starter, and two compressors of the refrigeration unit connected to the diesel generator with the corresponding engines, the first of which is connected to the output of the second magnetic starter, and the second engine is connected to the output of the third magnetic the actuator, characterized in that, in order to reduce fuel consumption by ensuring the nominal load of the diesel generator, AND, NOT and OR elements are introduced into the system, and OR is connected to the output m to the input control switching diesel genera-- torus, and the first and second input - to the outputs of the first and second magnetic contactors element are not connected to the output of the first magnetic actuator, and the output - to the first input of AND gate connected with the second input the output of the second magnetic actuator, and the output - with the input of the third magnetic actuator. About About 1 one O 1 o one ttiwm -i itfliirnt / .I I, and loading the booster „.. R diesel - M 2fHepamo- f pa "5a pt / 5Ka ± - dich / ib fj generation -LL1- - - mopcfI I o 1 o o about 1 1 one r FI.2