SU397721A1 - METHOD FOR REGULATING THE REFRIGERATOR TEMPERATURE IN A REFRIGERATOR INSTALLATION - Google Patents

Description

one

The invention relates to refrigeration units with cold accumulators and, most particularly, in air conditioning systems.

Methods are known for adjusting the temperature in a refrigeration unit with a cold accumulator by mixing coolant notes coming from the evaporator and the battery to the consumer.

The purpose of the invention is to reduce energy consumption in the implementation of the method.

To achieve this goal, stabilize the temperature of the coolant entering the consumer and the battery by changing the amount of coolant circulating through the evaporator. The selection of the mixture is made from the evaporator-to-battery link.

In addition, part of the coolant after the evaporator is recycled.

FIG. 1, 2, 3 schematically shows the installation (variants) in which the described method is carried out.

Refrigeration unit contains evaporator 1, cold battery 2, collectors 3, 4, 5 for respectively warm, intermediate and cold coolant, pumps G, 7 for supplying coolant to evaporator 1 and to cold consumer 8, regulator 9 of coolant flow rate in the evaporator

1, sensors 10, 11 of the temperature of the coolant supplied to the consumer 8 and at the outlet of the evaporator 1, the device 12 with the switch 13, which records the flow rate is holol, and the consumer 8, the reverse valve 14.

In the refrigeration unit (Fig. 1), the coolant from the warm collector 3 is pumped by pump 6 into Hcnapiiie ib 1, where it is cooled, and in the daily rym; 1 collector 4. From the latter, the coolant collector 5 enters the cold accumulator 2, and pump 7 is supplied to the consumer of cold 8. In the collector 5, the cold carrier, depending on the consumption of cold by the consumer 8, circulates to the battery 2 or to o6pai ;; jM direction - to the consumer 8 cold.

The device 12, with the help of the switch 13, connects with the consumer 8 the consumption mechanism of the regulator 9 with the temperature sensor 10, and in the absence of consumption with the temperature sensor 11.

In the refrigeration unit, the refrigerant air quality circulating through the input device 1 is variable.

FIG. 2, 3 shows the schemes of refrigeration units in which the amount of coolant circulating through the evaporator 1 is constant. This is ensured by the recycling of a portion of the refrigerant after the evaporator 1.

FIG. 2 shows a diagram of a high-capacity refrigeration unit.

Recirculation is carried out using flow controller 9 and check valve 14.

On fpg. 3 shows a low-capacity refrigeration unit.

Recirculation is carried out in this case by means of the regulator 9, which is in the form of a three-way control valve.

When cold consumption by consumer 8 is less than or equal to that produced by evaporator 1, temperature sensor 10 acts on flow controller 9 and changes the amount of coolant cooled in evaporator 1. This temperature is kept constant, equal to the set temperature of coolant supplied to consumer 8 cold weather Depending on the consumption of cold by consumer 8, the excess refrigerating agent cooled in the evaporator 1 is sent to accumulator 2, displacing an equal amount of warm refrigerating agent from it, which enters the collector 3. There it is mixed with coolant coming from consumer 8 and sent to the evaporator one.

If the consumer 8 ne consumes cold, the device 12 uses the switch 13 to turn off the flow control device 9 from the temperature sensor 10 and connects it to the temperature sensor 11. In this case, depending on the daily cold consumption schedule by the consumer 8, the coolant temperature after the evaporator 1 is regulated or not regulated.

In the first case, the temperature of the coolant in the battery 2 gradually decreases to an acceptable minimum level.

In the second case, the flow regulator 9 according to the reading of the temperature sensor 11 changes the quantity of the coolant cooled in the evaporator 1 cooled in the battery 2, maintaining its temperature at a predetermined level.

The consumption of cold by the consumer 8, greater than that produced in the charger 1, the required amount of coolant sent to the consumer 8 is obtained by mixing it to the cooler carrier that is taken from the battery 2, less than cold, coming from the evaporator 1. The temperature of the cold carrier supplied to the consumer 8, is maintained at a predetermined level by the temperature sensor 10, which, acting on the flow controller 9, changes the amount of coolant.

Subject invention

Claims (3)

1. A method for controlling the temperature of the refrigerant in a refrigeration unit with a cold accumulator and an evaporator, characterized in that, in order to reduce energy costs, stabilize the temperature of the refrigerant supplied to the consumer and the battery by changing the amount of refrigerant flowing through the evaporator. 2. A method according to claim 1, wherein a portion of the coolant after the evaporator is recycled. 3. The method according to claim 1, characterized in that the selection of the coolant supplied to the consumer is made from the communication line of the evaporator with the battery. 12 13 i ir , UX, 9 chik X-6