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Thursday, 19 July 2018
Monday, 9 July 2018
Wednesday, 7 February 2018
Tuesday, 6 February 2018
Wednesday, 31 January 2018
Rotary Compressors:-
In rotary compressors, the vapour
refrigerant from the evaporator is compressed due to the movement of blades.
The rotary compressors are positive displacement type compressors. Since the
clearance in rotary compressors is negligible, therefore...
Hermetic Compressors
When the compressor and
motor operate on the same shaft and are enclosed in a common casing, they are
known as hermetic sealed compressors. These types of compressors eliminate the
use of crankshaft seal which is necessary in ordinary compressors...
Important Terms
Suction pressure. It is the absolute pressure of refrigerant at the inlet of a compressor.
Discharge pressure. It is the absolute pressure of refrigerant at the outlet of a compressor.
Compression ratio (or pressure ratio). It is the ratio of absolute discharge pressure to the absolute suction pressure. Since the absolute...
Friday, 26 January 2018
How to wiring window air condition
How to wiring window air condition compressor , fan motor, to multi capacitor .
we will discuss How to connect PCB board to compressor and fan motor we will discuss
all kinds of the wiring on this video so this video is most helpful...
Window air condition PCB board wiring
Window air condition PCB board wiring this video is totally helpful for know the component of the PCB board and how the PCB board work we will discuss about the connection of the PCB board like sensor blower motor Sewing water power supply...
L R A ( Lock Rotor Amps ) HINDI
What is LRA? We discuss about LRA this is the most important to know what is the LRA
and how we know the TON of the compressor So LRA is helping to know The compressor
Ton so there is a formula to know the compressor Ton...
Wednesday, 24 January 2018
Gas charging ,R410A R22 R32 pressures, - HINDI
This video is helping to know identify the gas in the air condition unit and what kinds of the pressure
we will maintain to the air condition. We will discuss on this video to R22 gas R410a gas and
R32 gas and etcetera so...
Monday, 22 January 2018
Formula for finding the piston displacement of a compressor
Compressor can be calculated as follows:-
Where:-
V = Volume in cubic feet.
D = Diameter of cylinder in inches.
S = Length of stroke in inches.
N = Number of cylinders.
R = Revolution per minute (R.P.M.)
The...
Saturday, 20 January 2018
LAWS OF REFRIGERATION
The laws upon which the theory of refrigeration is based and where they find their applications in refrigeration system.
Heat can be converted into work and work into heat. This law that, "heat can be converted into work" applies in the...
Float valve function
The liquid level falls below the normal level in the float housing, the float ball comes down pulls the needle from its seat and allows the liquid refrigerant to enter into the float housing and evaporator. As soon as the liquid level rises, it carries the float ball to the proper height which helps the needle to go back to its seat and prevents...
CONDENSER
Condenser is a part in mechanical refrigeration system which condenses the gas above its critical pressure and below its critical temperature.
To receive compressed vapours from the compressor and to liquefy them by removing their heat.
It receives vapours above their critical pressure and above critical temperature from compressor and...
Rotary Compressor main parts
Main body.
Eccentric shaft
Suction service valve.
Discharge valve plate
Discharge service valve.
Discharge valve
Cylinder or pump chamber
Dividing blade
Roller.
Check valve
...
Types of a Compressor
Centrifugal compressor.
Reciprocating compressor.
Rotary screw compressor.
Scroll or spiral compressor.
Wobble or Swash plate compressor.
Rotary Compressor.
...
Friday, 12 January 2018
Lock Rotor Amps
L R A ( Lock Rotor Amps )
If L R A Mansion in your compressor. How we know the ton of the compressor:-
ANS:- It's Simple put a formula which mention here LRA divide by 36.
Suppose LRA is 58
So what we do ? Simple...
Tube cutter
Always hold the open end of the tube down when reaming or filing, so that metal chips may not go in side the tube.
Do not cut flat and pinched surfaces of tube with a tube cutter.
Do not apply too much pressure at a time...
Voltage type relay work ?
S.No
Amperage type Relay
Voltage type Relay
1.
It is used with split phase hermetic motors.
It is used with capacitor start capacitor
run hermetic motors.
...
Types of a relay
Three types of relay :-
Current coil or amperage type relay
Potential or voltage type relay.
Hot wire relay.
Relay ?
It is an electrical operated switch used...
Thursday, 11 January 2018
How to Identify Common / Start / Run on the t Compressor Terminal
in 3 easy steps
use the formula: -
1. common and start is equal to medium value
2. start and running is equal to high value
3. run and common is equal to low value
This is the formula which we have put on to...
RETROFITTING OF R 22 MACHINE WITH R427 A
For retrofitting of R 22 machine with R 427 A proceed as under : 1. Start the machine charged with R 22 and note its temperatures and pressures. See the defect if any and repair it. 2. Draw out the R22 refrigerant from the machine and collect...
R427 A
This refrigerant has been prepared by mxing R32 +R125 + R143a + R134a in their mass percentages of 15 + 25 + 10 + 50 respectively. It belongs to HFC group of refrigerants. Its ODP is zero and GWP is 2000. It is neither toxic nor flammable....
R410 A
This refrigerant has been prepared by mixing R32 + R125 in equal quantity. It belongs to HFC group of refrigerants. Its ODP is zero and GWP is 1800. It is neither toxic nor flammable. Therefore it comes under the safety class of Al. Its boiling...
Mechanical refrigeration system
In mechanical refrigeration system, the vapours caused by a sudden change of liquid in metering device without gaining any heat is known as flash gas. Before entering the liquid into the evaporator, the formation of flash gas at the metering device is not useful at all. Because this flash gas does not gain any heat in the evaporator. Therefore,...
FLOAT VALVE CONTROLS
The float valve controls are of two types. One is low side float control and the other is high side float. This type of control is used in the flooded type of refrigeration system, while' the refrigerant control devices described upto so far, generally used in dry type of refrigeration system. Before studying these two types of control devices, it...
CAPILLARY TUBE
It is very small diameter tube made of copper readily available in various sizes i.e. from .026" to .064" inner dia. The tube is very carefully manufactured that it may be able to provide a regular flow of liquid refrigerant to the evaporator. Because the capillary tube has no moving part, therefore it has several advantages. First, there is no part...
Wednesday, 10 January 2018
THE CENTRAL AIR CONDITIONING PLANT
air conditioning machine whose complete water cooled condensing unit :-.eluding evaporator is located in the basement and the conditioned air is forced by a blower into the various rooms through ducts. In winter for heating electrical heating strips are used in front of blower.
The blower throws air through these heating strips and heats the...
Monday, 8 January 2018
Sunday, 7 January 2018
Ton AC sufficient foot room
1 Ton AC for 100 sq. foot room
1 Ton AC sufficient for 100 sq. To 120 sq. foot room
1.5 Ton AC sufficient 150 sq.foot
1.5 Ton AC sufficient for 150 sq. To 170 sq. foot room
2 Ton AC 200 sq. foot room
2 Ton AC sufficient fora 200 sq. To 240 sq. foot room
1...
