The evaporator of the refrigerating unit

 

(57) Abstract:

The evaporator of the refrigeration unit includes an evaporator tube, thermostatic expansion valve and solenoid valve. Thermostatic expansion valve consists of a casing with inlet and outlet chambers, a gauge system, the temperature-sensitive sensor which is installed at the outlet of the evaporator tube, the valve that changes the flow of refrigerant depending on overheating vapors at the outlet of the evaporator tube, the spring configuration and mechanism regulating the initial effort this spring. Solenoid valve consists of a solenoid coil, a core, with a fixed valve and return springs. Solenoid valve installed in the inlet chamber of the valve and connected to an electrical control circuit of the compressor motor. Its core with a fixed valve is designed for tight shutoff of the supply of liquid refrigerant to the valve thermostatic expansion valve when engine is off compressor refrigeration unit. The use of the invention will improve the reliability of the evaporator, to reduce its cost, complexity of Assembly, overall dimensions, to expand the La auto cooling fluid and air.

Known evaporator refrigeration unit (catalogue company Danfoss A/S (SW-c) 9.92, Denmark, S. 11), which contains sequentially interconnected: solenoid valve EVR, tightly overlapping the supply of liquid refrigerant in the evaporator tube (coil) at the stop of the compressor, thermostatic expansion valve THE regulating superheat temperature vapor refrigerant at the outlet of the evaporator tube, evaporator tube, which is the process of evaporating the cooling agent, accompanied by a selection of heat from the environment.

Solenoid valves type EVR company "Danfoss" (catalogue company Danfoss A/S (SW-c) 9.92, Denmark, S. 17) consists of a die-cast housing with inlet and outlet chambers, to which is connected the inlet and outlet pipes. To the housing by means of square flange mounted electromagnetic coil core and the electrical connector, through which it is connected to the electric control circuit of the compressor motor.

Thermostatic expansion valve type of the company "Danfoss" (catalogue company Danfoss A/S (SW-c) 9.92, Denmark, S. 11) consists of an extruded housing with inlet and outlet chambers, arranged at an angle of 90oamong themselves, to which podsiad embrane the cavity of the valve with the outlet of the evaporator tube. The valve body rigidly connected manometric system filled with a substance with a given dependence of pressure on temperature, remote temperature-sensitive sensor which is installed at the outlet of the evaporator tube.

The disadvantages of this evaporator are: large weight and size characteristics, narrowing the scope of the evaporator, low reliability, high cost and complexity of Assembly, due to the number of separate components (components) construction of the evaporator, and, as a consequence, a large number of connections, which should provide a high degree of tightness of the evaporator.

The technical object of the present invention are: to improve the reliability of the evaporator, reducing its cost, labor-intensive, Assembly, weight and size characteristics, the expansion of the scope.

This objective is achieved in that a solenoid valve comprising an electromagnetic coil core and the electrical connector is installed in the inlet chamber of the housing of thermostatic expansion valve that allows without reducing functionality to reduce the number of separate components, entering the main characteristics and to extend the scope of the evaporator.

The drawing shows a General view of the proposed evaporator of the refrigerating unit.

The evaporator of the refrigeration unit includes a thermostatic expansion valve 1 solenoid valve 2 and the evaporator tube 3.

Thermostatic expansion valve 1 consists of a housing 4 with an inlet chamber 5 and the outlet chamber 6, manometric system 7 remote temperature-sensitive sensor 8 and the diaphragm 9, a valve 10, which regulates the flow of refrigerant depending on the reheating temperature vapor refrigerant at the outlet of the evaporator tube 3, the rods 11, the spring settings 12, 13, regulating the initial force of the spring configuration 12, the pipe line 14 external pressure equalization connecting podobrannyy the cavity of the valve with the outlet of the evaporator tube 3.

Solenoid valve 2 installed in the inlet chamber 5 of the housing 4 of thermostatic expansion valve 1 and consists of an electromagnetic coil 15, the return spring 16, the core 17 with a fixed valve 18, which hermetically closes off the supply of liquid refrigerant to the valve 10 of thermostatic expansion valve 1.

Changing the temperature of the overheated vapour refrigerant at the outlet of the evaporator is substance in the manometric system 7. The membrane 9 compares the pressure in the gauge system 7 with the vapor pressure of the refrigerant at the outlet of the evaporator tube 3, passed in podobrannyy cavity expansion valve 1 through the pipe line 14 external pressure equalization.

Depending on the magnitude of the pressure difference acting on the diaphragm 9, the last act and through the rod 11 acts on the valve 10, which, moving, changes the supply of liquid refrigerant in the evaporator tube 3.

The supply of liquid refrigerant increases with temperature overheating vapors and, respectively, with increasing pressure inside the gauge system 7, and Vice versa.

During operation of the refrigeration unit, the electromagnetic coil 15 of the solenoid valve 2 is turned on, which caused the occurrence of a magnetic field, under which the thrust force holds the core 17 with a fixed valve 18 within the electromagnetic coil 15, allowing the liquid cooling agent to freely flow to the valve 10 of thermostatic expansion valve 1.

When stopping the compressor motor, because of the technological features or avarim 18 under the influence of return spring 16 and its own weight hermetically closes off the supply of liquid refrigerant liquid refrigerant to the valve 10 of thermostatic expansion valve 1, thereby significantly reducing the starting load on the compressor motor when it is turned on.

The application of the proposed evaporator can increase the reliability of the refrigeration unit and to expand the scope of its application.

The evaporator of the refrigerating unit, comprising evaporating tube and thermostatic expansion valve consisting of a casing with inlet and outlet chambers, a gauge system, the temperature-sensitive sensor which is installed at the outlet of the evaporator tube, the valve that changes the flow of refrigerant depending on overheating vapors at the outlet of the evaporator tube, the spring configuration and mechanism regulating the initial effort this spring, and solenoid valve comprising an electromagnetic coil, a core, with a fixed valve, and a return spring, wherein the solenoid valve is installed in the inlet chamber of the valve, connected to the electric control circuit of the compressor motor, and its core with a fixed valve is designed for tight shutoff of the supply of liquid refrigerant to the valve thermostatic expansion valve when engine is off you can see the compressor

 

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