Ordinary fresh-keeping display cabinet refers to the direct cooling most fresh-keeping display cabinet with reciprocating compressor. There is only one mechanical temperature controller for this kind of most fresh-keeping display cabinet, including double door, three door and four door refrigerated freezers.

The working principle of the refrigeration system of the general fresh-keeping display cabinet the general most fresh-keeping display cabinet generally adopts reciprocating compressor, its refrigeration system structure is typical, the work of the refrigeration system is controlled by the electrical system, and the control basis of the electrical system is set according to the user.

Next, the editor will introduce the work of the refrigeration system:

1. The compressor motor is the heart of the refrigeration system, which is used for heat energy conversion and makes the refrigerant cycle back and forth in the system. It sucks in the refrigerant that has absorbed heat from the evaporator and becomes gaseous. After compression, it becomes high-temperature and high-pressure gas, which is delivered to the door frame anti dew pipe. This process is driven by motor, that is, electric energy is converted into mechanical work through motor, and mechanical work is converted into thermal energy through compressor.

2. The anti dew tube is hidden around the cabinet door, the refrigerant is compressed into high temperature and high pressure gas in the compressor, and sent to the condenser through the anti dew tube, so that the cabinet door frame is heated to higher than the room temperature, to avoid condensation on the external surface of the door frame in high temperature and humidity seasons.

3. Because the condenser pipeline is very long, the high-pressure and high-temperature gaseous refrigerant discharged from the compressor flows through it, which is transferred to the air for heat dissipation through heat transfer, and the temperature gradually drops to condense into liquid refrigerant.

4. The liquid refrigerant discharged from the condenser of the drying filter shall be firstly dried to absorb the moisture in the refrigerant through the filter, filter the visible dirt, and then sent to the capillary. In order to avoid impurities and water entering into the capillary with small pore diameter to form a blockage, affecting the circulation of refrigerant.

5. The orifice diameter of capillary tube is very fine, generally 0.5mm-lmm. The liquid refrigerant from the drying filter is restricted to throttle and control the flow when passing through the capillary tube, so as to make it completely and fully liquid.

6. The liquid refrigerant of the evaporator enters the evaporator with large aperture through the capillary with fine aperture. The pressure suddenly decreases, which makes the boiling point drop and evaporate into gas, and absorbs the heat around (freezing and refrigeration room) during evaporation, so as to reduce the temperature of the freezing and refrigeration room. The refrigerant vaporized by the evaporator is sucked in by the compressor again. The refrigerant circulates in the system so repeatedly that the heat in the freshest display cabinet is transferred to the surrounding air through the refrigerant, so that the freshest display cabinet can achieve the refrigeration purpose.