Refrigeration unit with automatic defrost


(57) Abstract:

Usage: in refrigeration. The inventive compression refrigeration unit contains a closed circulation path of the refrigerant, while the tube is located inside the suction pipe and coiled tube evaporator connected at one end with the suction pipe. The other end of the evaporator continue without capillary tube and connected to the compressor through the solenoid valve defrost, forming with the suction pipe in a sealed regenerative heat exchanger. 1 Il.

The invention relates to refrigeration, namely compression refrigeration units mainly household refrigerators and freezers.

Known refrigeration units in refrigerators, having a device for reducing the amount of frost buildup on the input side of the evaporator of the refrigerating chamber by feeding the refrigerant in the secondary channel in the input side of the evaporator [1] also known refrigeration units with defrost evaporator cooled camera during non-working period of the cycle, where the capillary tube is located along the overflow tube in the immediate, near the th tube. The regenerative heat exchanger has the form of a trap with a water seal and is installed above the evaporator cooled chamber, the upper part of the evaporator is cooled chambers are inclined [2]

Known compression refrigeration unit containing connected in series compressor, condenser, capillary tube, located inside the suction pipe and coiled tube evaporator connected to one end of this pipe [3] This technical solution is the closest to this invention to the technical essence and the achieved result.

The disadvantage of the above technical solutions is the difficulty in manufacturing the device defrosting of the evaporator, the process of defrosting time consuming, which leads to the loss of cold inner chamber of the refrigerator, the Assembly of the refrigerator with a refrigerating units time-consuming and not technological. Difficult automation defrosting of the evaporator. Increases energy consumption. The present invention solves the technical problem to accelerate the defrosting coil-tube evaporator with a capillary tube inside, drying of the refrigerant entering the compressor from the evaporator and prevent tx2">

The invention is illustrated by the drawing, which schematically shows a compression refrigeration unit.

Compression refrigeration unit contains connected in series compressor 1, condenser 2, the capillary tube 4 located inside the suction pipe 4 and the coiled tube of the evaporator 5 is connected to one end of this pipe. The other end of it is without capillary tube and has an area of 6, connected to the compressor 1 through the electromagnetic valve 7 mounted on the discharge pipe 8. While the section 6 of the pipeline is connected with a plot of the suction pipe 4 with education in the closed volume of the regenerative heat exchanger 9.

The unit is equipped with a filter-drier 10 and datepalm 11 fluid located on the evaporator 5. The last is placed in the working volume of 12.

Refrigeration unit with automatic defrost works as follows.

Compressed by the compressor 1 hot pair of refrigerant through the heating pipe 8 with the electromagnetic valve 7 defrost enter the condenser 2, where the resulting condensate through the filter-drier 10 enters the capillary tube 3, ruspolia evaporator 5, the refrigerant from the capillary tube 3 is supplied to the internal volume of the coiled tube evaporator 5 and begins to rapidly boil, taking heat from the cooled volume 12 and the capillary tube 3, moving in the opposite direction. The vapors of the refrigerant through the suction pipe 4 are received in the compressor 1, and the excess liquid refrigerant accumulates in dokoptili 11 and the cycle repeats.

If necessary, defrost coil-tube evaporator 5, turns on the electromagnetic valve 7 defrost. Hot saturated vapors of the refrigerant bypassing the condenser 2 through section 6 of the pipeline come to the end of the coiled tube evaporator 5, where it is condensed, intense giving the evaporator 5 heat. The resulting condensate fills decimater 11, and excess halon together with pairs enters into the suction pipe 4. On the site of the regenerative heat exchanger 9, which is located in a sealed, a pair of halon time taking some of the heat pipe 6, and fed to the compressor 1. The cycle is repeated until a complete defrost.

The design of this refrigeration unit with automatic defrost allows you to quickly defrost freezers when closed the refrigerator door. Reduces the temperature change of the inner walls of the cooling volume, eliminates the dew suction t is omit electricity and allows you to automate the process of defrosting.

In addition, in the operation of the electromagnetic valve process defrost occurs without turning off the refrigerator, provides the exception of the loss of the cold inner chamber of the refrigerator, reduces energy consumption, improves the manufacturability of the Assembly of the refrigerator, reduces complexity, improves consumer properties.

Compression refrigerating unit, containing connected in series compressor, condenser, capillary tube, located inside the suction pipe and coiled tube evaporator connected to one end of this pipe, characterized in that the unit is equipped with datepalm fluid located on the evaporator and the other end coiled tube evaporator continue without capillary tube and connected to the compressor through a solenoid valve installed on the discharge pipe, while the pipe section is connected with a plot of the suction pipe with education in the closed volume of the regenerative heat exchanger.


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