Service manual

AUX air conditioner service manual

For the purpose of enhancing the heat exchange coefficient of the condenser, the number of the wings

can be increased or the interval distance between the wings can be shortened. Because there is no

condensing water being produced by the wings of the condenser, and there is no much air resistance as

the evaporator faces, the distance between the wings can be shortened accordingly. The quantity of

heat transferred by the condenser is equal to the sum of the one absorbed by the indoor evaporator and

the one occurred during the operation of the compressor. The area of the surface to the common

condenser is usually larger than the one of the evaporator in order to promoting cooling capacity for

the room.

⑸The throttling component

The refrigerant in the refrigerating system of the air-conditioner has the need for maintaining a certain

evaporating and condensing pressure in order to absorb and release the quantity of heat and realize the

circulation of the system. The throttling component is the one in controlling the refrigerant and

maintains a certain flux. It is the device used in the refrigerating system cycle for accommodating the

flux of the refrigerant. It can have the temperature and pressure of the liquid refrigerant at middle

temperature and high pressure coming from the condenser dropped, and then send them to the

evaporator for obtaining the more evaporating temperature and pressure.

The air-conditioners in different specification have different capacity So, the throttling component in

controlling the different flux shall be different. The throttling component type in the general

air-conditioner includes the capillary tubes type and expansion valve type. But only capillary tubes

applied in the home use air-conditioner because of the small flux it is. The following is the detailed

introduction for it.

The capillary tube is a slim and long copper pipe with a small aperture. The inner diameter of it is

1mm—2mm, and the length is 500mm—1000mm. With the properties of simple structure, easy

machining, low cost and reliability, especially enough capability for the throttling need at a stable

indoor room temperature; it’s popularly applied in the practice. However, it has a weak

accommodating function, which can be workable under a rating working status but can’t adjust the

flux following with the variety of the load of the refrigeration system.

The capillary tube is a kind of throttling component applied in the refrigeration system. It is welded

between the condenser and the evaporator for the function of reducing pressure and throttling flux. It

can prevent the liquefied refrigerant at a normal temperature and pressure of the condenser entering

into the evaporator directly so as to reduce the pressure of the evaporator in favor of the evaporation

of the refrigerant. After stopping the operation of the compressor, it can maintain a balance between

the low-pressure part and the high-pressure part for the convenient re-start of the compressor. The

resistance will be reduced and the flux of the refrigerant will be increased if enlarging the inner

diameter or shortening the length of the capillary tubes, and on the contrary if otherwise. The capillary

tubes must match the refrigerating devices and cannot be replaced freely, especially when the inner

diameter, the roughness of the inner surface and the length are in difference, it may affect the normal

operation of the refrigeration system badly. As the narrowest part of the refrigeration system, the

capillary tubes may easily to be jammed. The figuration of the capillary tubes is indicated in the

picture 2-6 as the below.

⑹Liquid distributor