RU203959U1 - Chiller - Google Patents

Abstract

The utility model relates to the field of refrigeration technology and can be used in centralized refrigeration systems for enterprises of the processing, chemical, pharmaceutical, food and other industries. The chiller contains a heat-insulated tank made in the form of panel evaporators, with solenoid valves installed on each evaporator for on-off evaporators equipped with a control unit, a condensing unit with a magnetic starter, including a compressor, a liquid refrigerant separator, an oil separator, a condenser and a receiver, installed in series on a frame made of a steel profile pipe and interconnected by copper pipes with shut-off valves. The condensing unit is connected to the evaporators through two collectors by means of pipes forming a suction line and a refrigerant discharge line, on the inner surface of which thermal insulation is provided for pipes made of foamed polyurethane, and the evaporators are made in the form of solid copper pipes. The device increases the efficiency of the process in question. It will be interesting in various fields of industry. 1 ill.

Description

The utility model relates to the field of refrigeration technology and can be used in centralized refrigeration systems for enterprises in the processing, chemical, pharmaceutical, food and other industries.

The closest in technical essence to the claimed device is a device for producing ice water (RU 197873, IPC B67D 7/80, F25C 1/12, 2020), consisting of a heat-insulated container, the walls of which consist of panel evaporators (heat exchangers), compressor-condenser a unit including a compressor, a liquid refrigerant separator, a condenser, an oil separator and a receiver, installed in series on a frame made of a steel profile pipe. All units of the condensing unit, through which the refrigerant circulates, are interconnected by copper pipes, forming a discharge line and a refrigerant suction line. Solenoid valves and a thermostatic expansion valve are installed on the refrigerant discharge line to regulate the refrigerant supply. For a uniform state of water, the insulated tank is equipped with a circulation pump that mixes the water during the cooling period. The device is controlled by an electronic control unit.

The disadvantage of the known device is its low efficiency, due to the lack of the ability to operate the equipment in the mode of cold accumulators and the necessary time for uniform mixing of water during the cooling period.

The technical task of the proposed utility model is to improve the efficiency of work.

The technical result is achieved by the fact that a chiller containing a heat-insulated container made in the form of panel evaporators, with solenoid valves installed on each evaporator for switching on and off the evaporators, equipped with a control unit, a condensing unit with a magnetic starter, including a compressor, a liquid refrigerant separator, oil separator, condenser and receiver, installed in series on a frame made of a steel profile pipe and interconnected by copper pipes with shut-off valves, according to the utility model, the insulated tank is equipped with a stirrer, the condensing unit is connected to the evaporators through two collectors by means of pipes forming a suction line and refrigerant discharge line, on the inner surface of which thermal insulation for pipes made of foamed polyurethane is provided, and the evaporators are made in the form of solid copper pipes.

The utility model is illustrated by a drawing, which shows a schematic diagram of the chiller device.

The chiller consists of a rectangular tank, the walls of which consist of panel evaporators (heat exchangers) 1, a compressor-condensing unit including compressor 2, liquid refrigerant separator 3, oil separator 4, condenser 5 and receiver 6, installed in series on a frame made of a steel profile pipe. All units of the condensing unit, through which the refrigerant circulates, are interconnected by copper pipes with shut-off valves. The condensing unit is connected to the evaporators 1 through two collectors, by means of pipes forming a suction line 7 and a refrigerant discharge line 8, inside which thermal insulation is provided for pipes made of foamed polyurethane 9. Thermoregulatory valves 10 are installed on the refrigerant discharge line 8, separately on the evaporators 1 Also on the discharge line 8 there are installed a hot gas solenoid valve 11, a condensed refrigerant solenoid valve 12 and a check valve 13, which regulate the refrigerant supply process. For uniform cooling of water in a heat-insulated container, it is equipped with a circulation pump 14 and a stirrer 15, which evenly mixes the liquid during the cooling period. The device is controlled by an electronic control unit 16.

Evaporators 1 are made in the form of solid copper tubes.

An increase in the efficiency of uniform mixing of water during the cooling period is achieved by an additional element of the mixer 15.

The achieved efficiency of the equipment operation in the cold accumulator mode is determined by the accumulation of cold during the operation of the refrigerating machine and the use of the accumulated resources when necessary.

The chiller works as follows.

First, the liquid in the container is cooled. To do this, compressor 2 is started, which supplies refrigerant under pressure through condenser 5, condensed refrigerant accumulates in receiver 6, then the solenoid valve opens, the refrigerant passes through the thermostatic valve 10 and flows through the discharge line 8 to evaporators 1. As a result, the water in the tank is cooled. And the refrigerant vapors through the suction line 7 through the moisture separator 3 enter the compressor 2. In this case, the water is intensively and evenly mixed by the circulation pump 14 and the mixer 15, which, when the temperature reaches + 3 ° C, is turned off, and the system goes into ice freezing mode. Ice freezing occurs only on the bottom of the evaporator 1.

After freezing ice with a layer of no more than 5 mm, the solenoid valve is automatically closed on the evaporator panel 1 and the refrigerant is pumped out of the evaporator 1. Then another solenoid valve opens and hot gas from the compressor 2 enters the evaporator 1. The evaporator 1 heats up and ice begins to separate from the evaporator panel 1 and float to the liquid surface.

In this case, the check valve 13 is closed and the hot gas does not enter the thermostatic valve, protecting it from failure. After freezing the ice, the solenoid valve closes, the condensed hot gas is pumped out of the evaporator 1 through the suction line 7 and through the liquid separator 3 enters the compressor 2. Then, through the oil separator 4, it enters the condenser 5, which automatically starts up, the condensed gas enters the receiver 6, after which the solenoid valve 11 and the check valve 13 open and the refrigerant flows through the discharge line 8 to the evaporator 1. A new process of freezing the ice layer begins.

The device is controlled through the electronic control unit 16, including the accumulation of cold during the operation of the refrigerating machine.

The device increases the efficiency of the considered technological process. It will be interesting in various fields of industry.

Claims (1)

A chiller containing a heat-insulated container made in the form of panel evaporators, with solenoid valves installed on each evaporator for switching on / off the evaporators, equipped with a control unit, a condensing unit with a magnetic starter, including a compressor, a liquid refrigerant separator, an oil separator, a condenser and a receiver, installed in series on a frame made of a steel profile pipe and interconnected by copper pipes with shut-off valves, characterized in that the insulated tank is equipped with an agitator, the condensing unit is connected to the evaporators through two collectors by means of pipes forming a suction line and a refrigerant discharge line, on the internal the surface of which is provided with thermal insulation for pipes made of foamed polyurethane, and the evaporators are made in the form of solid copper tubes.

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