28.Explain in detail of SPLIT AIR CONDITIONER with diagram.
The split air conditioner comprises of two parts: the outdoor unit and the indoor unit. The
outdoor unit, fitted outside the room, houses components like the compressor, condenser and
expansion valve. The indoor unit comprises the evaporator or cooling coil and the cooling fan.
For this unit you don‟t have to make any slot in the wall of the room. Further, present day
split units have aesthetic appeal and do not take up as much space as a window unit. A split
air conditioner can be used to cool one or two rooms.There are two main parts of the split air
conditioner. These are:
1. Outdoor unit
This unit houses important components of the air conditioner like the compressor, condenser
coil and also the expansion coil or capillary tubing. This unit is installed
outside the room or office space which is to be cooled. The compressor is the maximum noise
making part of the air conditioner, and since in the split air conditioner, it is located outside the
room, the major source of noise is eliminated. In the outdoor unit there is a fan that blows air
over the condenser thus cooling the compressed Freon gas in it. This gas passes through the
expansion coil and gets converted into low pressure, low temperature partial gas and partial
liquid Freon fluid.
2. Indoor unit
▪ It is the indoor unit that produces the cooling effect inside the room or the office. This is
a beautiful looking tall unit usually white in colour, though these days a number of
stylish models of the indoor unit are being launched.
▪ The indoor unit houses the evaporator coil or the cooling coil, a long blower and the filter.
After passing from the expansion coil, the chilled Freon fluid enters the cooling coil.
▪ The blower sucks the hot, humid and filtered air from the room and it blows it over the
cooling coil. As the air passes over cooling coil its temperature reduces drastically and
also loses the excess moisture.
▪ The cool and dry air enters the room and maintains comfortable conditions of around
25-27 degree Celsius as per the requirements.
▪ The temperature inside the space can be maintained by thermostat setting. The setting
should be such that comfortable conditions are maintained inside the room, and there is
also chance for the compressor to trip at regular intervals. If the compressor keeps running
continuously without break, its life will reduce.
▪ These days‟ multi-split air conditioners are also being used commonly. In units for
one outdoor unit there are two indoor units which can be placed in two different rooms
or at two different locations inside a large room.
▪ Since there is long distance between the indoor and the outdoor unit, there is always
loss of some cooling effect; hence for the same tonnage, split air conditioners produce
somewhat less cooling effect than window air conditioners.
▪ However, with modern insulation material this gap has been reducing between the two. In
any case, there are number of instances where there is just no alternative to the split air
conditioners.
29.Write the difference between inverter A/C and Non
inverter A/C 30.What is the LATEST INNOVATIONS IN AIR
CONDITIONER?
The biggest difference between inverter and non-inverter AC is the fact that the motor of
the inverter compressor has a variable speed. The speed of the non-invertor compressor is
fixed.
This means that it operates either at full or minimum speed
INVERTER TECHNOLOGY
An inverter is a device for converting frequency. The technology is used in many home
appliances and controls electric voltage, current and frequency. Inverter air-conditioners
vary their cooling/heating capacity by adjusting the power supply frequency of their
compressors.
An inverter type air-conditioner adjusts the speed of the compressor to control the
refrigerant (gas) flow rate, thereby consuming less current and power. An inverter has
precise temperature control and as the set temperature is attained, the unit adjusts its
capacity to eliminate any temperature fluctuations.
In contrast, non-inverter air conditioners have a fixed cooling/ heating capacity and can
only control the indoor temperature by starting or stopping their compressors.
Non-inverter air-conditioners stops and starts repeatedly. The power consumption and
current goes down when the operation stops, but it goes up sharply at the time of restart and
thus it has high average power consumption and temperature variations. As a result, inverter
air conditioners are more energy-saving and comfortable than non-inverter air-
conditioners.
Let’s take an example of 1.5 Ton AC. Inverter AC can work from. 3 to 1.7 ton based on cooling
requirement. Non-inverter AC can work at 1.5 ton only (fixed capacity).
Inverter power control
Non-inverter type air-conditioner
Inverter air-conditioners are able to vary their operating capacity. Non-inverter
air- conditioners can only operate at a fixed capacity.
Figure: Inverter AC (Scenario: Indoor Temperature: 22 Degree, Set Temperature: 22 Degree
Benefits of inverter AC
