1. Structure of refrigerator condenser
The condenser is the cooling part of the refrigerator, which is usually located on the back of the refrigerator. According to the different design methods of condenser, the condenser can be divided into exposed type and hidden type.
1. Exposed capacitor
The exposed condenser is directly fixed on the back of the refrigerator and connected with the refrigeration pipe of the refrigerator through the connecting pipe. The exposed condenser can be divided into steel coil condenser and louver condenser according to the different ways of heat dissipation.
(1) Steel coil condenser
Wire coil condenser is also called wire tube condenser. Its serpentine coil is made of copper plated steel sheet. Weld steel wire with diameter of 1.5 ~ 2mm evenly on both sides of coil, and use steel wire to dissipate heat, as shown in the figure below. The condenser has the advantages of small volume, light weight, good heat dissipation effect and convenient for mechanized production.
(2) Louver condenser
The coil of the louver condenser is tightly embedded, expanded or spot welded on the louver heat dissipation steel plate to form air holes, as shown in the figure below. The coil is generally made of red copper (pure copper), and the heat dissipation steel plate is made of ordinary carbon steel plate. The structure of condenser is simple, but the heat dissipation effect is poor.
2. Built in condenser
At present, most refrigerators use built-in condenser, which uses extruded or adhesive aluminum foil to stick the snake coil on the back or inside of the side plate of the refrigerator box, and uses the outer wall of the refrigerator box to dissipate heat.
The built-in capacitor has the advantages of small occupation space and not easy to damage. However, the heat dissipation performance of the condenser is not as good as that of the exposed condenser. In addition, because the condenser is located in the refrigerator box, the maintenance of this kind of condenser is troublesome.
3. Air condenser
Air cooled condensers will be used in large refrigerators. Its structure is shown in the figure below. It is made of pure copper tubes and fins. The pure copper tube is welded on the fin and made into a cuboid together with the fin, and then installed on the box wall. The condenser has compact structure, high heat dissipation efficiency and large heat dissipation capacity.
2. Working principle of condenser
The condenser is also called a radiator. The air inlet pipe is connected with the air outlet of the compressor. The high temperature and high pressure refrigerant gas treated by the compressor enters the condenser from the air inlet. The outlet pipe of the condenser is connected with the drying filter, which changes the refrigerant into liquid after cooling by the condenser. It is filtered by drying filter, throttled by capillary and sent to evaporator.
Its function is to heat exchange the high temperature and high pressure refrigerant gas processed by the compressor with the surrounding air, and then cool it into liquid after heat exchange.