AIR CONDITIONER:-

In the present scenario, where the temperature is increasing all over the world, air conditioners are surely getting much more applicability. An air conditioner has different types of parts, which together make the room atmosphere cool and comfortable. In this article, we will discuss about a particular component of an air conditioner, the compressor. How a compressor contributes to the whole process of air conditioning, what are the different types of compressors and what type of compressors you should choose for your air conditioner will be some of the major topics of our discussion.

Table of Contents

General information about compressor

Different types of compressors in air conditioners:

Which should we choose?

Air conditioner

General information about compressor

Air conditioners usually have three components, which play an important role in the entire process of air conditioning: compressor, condenser, and evaporator. Air passes through all these components and comes out cool and comfortable. In all of these components, the compressor compresses the refrigerant into a high-pressure fluid, the refrigerant which is a high-temperature fluid when it passes through the compressor that brings out the heat from it, and it is then absorbed. -Passes the pass. This high-pressure fluid, finally through the room evaporator process, passes through an expansion valve, which transforms the gas into a cold liquid and produces a cool and comfortable atmosphere in the room.

It is now clear that a compressor plays a major role in the entire air conditioning system. How a high-temperature fluid (refrigerant gas) is converted into a high-pressure fluid is determined by the compressor itself. Different types of compressors are available in the market. What are those, let's find them out?

Different types of compressors in air conditioners:

Nowadays the following two types of compressors are quite popular in the market.

1. Reciprocating (piston) air compressor: These compressors have a mixed system of cylinder and piston. It is similar to the engine of a vehicle. The piston creates a pressurized area of ​​the gas, which moves back and forth and then releases it (please see the picture below).

httpnuclearpowertraining.tpub.comh1018v2cssh1018v2_85.htm

2. Rotary air compressor: An ideal rotary (cyclic) air compressor, consists of a pair of rotors of a special design, with the pair having very short distances between each other for clearance. These rotors rotate in opposite directions, due to which the air rises under higher pressure than before.

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Apart from this, there are some other types of compressors, 'screw compressors', 'centrifugal compressors', and 'scroll compressors'. However, all these compressors are not as popular compared to the compressors mentioned above.

Which should we choose?

After seeing both compressors, it is only natural for people to raise the question that what type of compressors should we choose while buying air conditioners. To answer this question, we are listing here the pros and cons features of both types of compressors, so that it can help you in making the right decision.

Refrigerator working , principle.

REFRIGERATOR:
The low temperature of the fridge makes the reproduction rate of bacteria work. Due to which the food items deteriorate less.

The refrigerator keeps the temperature slightly higher than the freezing point.

A temperature of 3 to 5 ° C is required to store food.

Information about freeze:
The device which maintains a temperature below freezing point is called freezer. More levels run on the refrigerator vapor-compression refrigeration system.

Domestic refrigerators come in many types of size range. The smallest of which is 4 liters. And comes with a capacity of up to 600 liters or more.

When buying Fridge, it is seen how much capacity it has in liters. The more liters you can store the more food.

In a modern fridge, you can keep your food fresh for long days and due to this, food can be stored in bulk and can be used later.

Because buying food in bulk saves money.

History of refrigerator:
When the refrigerator was not even invented, ice houses were used.

Artificial refrigeration began when Scottish professor William Cullen built a small refrigerating machine in 1755.

He created a vacuum in a container of (Cullen) Diethyl ether with a pump and boil it and absorb heat from the air surrounding it.

With the help of this experiment, he was able to produce small amounts of ice. But at that time there was no practical use of it.

Who invented refrigerator in Hindi
In 1805, American inventor Oliver Evans described the closed vapour-compression refrigeration cycle for ice production.

In 1820, British scientist Michael Faraday liquefied ammonia and other gas with high pressures and low temperatures.

In 1834, Jacob Perkins built the first vapor-compression refrigeration system to run a refrigerator.

This device could run continuously.

In 1842, American physician, John Gorrie created the working prototype but proved to be a failure in the market.

The first commercial ice-making machine was invented in 1854.

How does the refrigerator work.refrigerator working, information about freeze.com
Before understanding how this works, you have to understand the refrigeration cycle.

Currently every refrigerator uses a vapour-compression refrigeration system (VCRS).

It uses refrigerant. And it is used in the air conditioning of buildings and automobiles.

Vapor-compression refrigeration cycle
Liquid refrigerant is circulated as a medium. Which absorbs the heat from the space to be cooled and leaves the heat elsewhere.

VCRS has 4 main components.

compressor
condenser
thermal expansion valve
evaporator

Vehicle System.

VEHICLE  SYSTEM:-
Layout of chasis (Components of automobile vehicle).

Various Components are,
1. Chasis. 
2. Axle.
3. Wheels. 
4. Suspension. 
5. Steering. 
6. Engine.
7. Clutch. 
8. Gearbox. 
9. Propeller shaft and universal joint. 
10. Differential gearbox. 
11. Radiator. 

1.CHASIS:
It is a metallic frame on which various components of automobile like engine,  gearbox,  clutch,  etc.  are to be mounted.

2.AXLE:
Axles are the component on which chasis is to be mounted.
Types of axle-
●Front axle~ It supports the chasis on the front side.
The steering mechanism mounted on front axle.
●Rear axle~ It supports the chasis on rear side.

3.SUSPENSION:
The chasis mounted on the axle not directly but through suspension system.
The suspension system isolate the vehicle body and passengers from the road shocks.

4.WHEELS:
This are mounted on the axle.
The load of the vehicle and passengers is supported by wheels through axle.

5.STEERING:
It is used to change the direction of front two wheels at the time of taking turns.

6.ENGINE:
It is an I.C engine which converts chemical energy into mechanical energy in terms of rotation of crank shaft.

7.CLUTCH:
It is located between gearbox and engine.
It is used to engage or disengage the driving and driven shaft, whenever required by the driver.

8.GEARBOX:
It is used to transmit the power from engine to propeller shaft through clutch.
It is used to increase or decrease the speed.

9.PROPELLER SHAFT /GEARBOX:
It is a mechanical device or element that transmits the power from gearbox to differential gearbox on rear axle.
One end of propeller shaft is connected to the gearbox output shaft through universal joint and other end of propeller shaft is connected to differential through universal joint.

10.DIFFERENTIAL GEARBOX:
It is used to transmit the power from propeller shaft to the shaft of the rear axle at right angle (90°).

11.RADIATOR:
It is mounted on the front of the vehicle and it is used for cold the hot coolent coming out from the engine and send it back to the engine.
vehicle system.com

Casting.

CASTING :-
Casting is one of the oldest method of manufacturing the metal components in which metal is first heated and poor that molten metal in the mold and allowed to solidified.

SAND CASTING PROCESS :
The process in which the mold is prepared by sand is called as sand casting process .

Steps in sand casting process-
1. Pattern making.
2. Sand mixing. 
3. Mould making.
4. Core making (optional).
5. Melting and pouring of molten metal.
6. Cooling and solidification. 
7. Cleaning and finishing. 
8. Inspection.

1. Patter making:
When the pattern of wood , metal or plastic which is used to making of cavity.

2. Sand mixing:
Prepared the sand for making of cavity.

3. Mould making:
The process of making cavity of desired shape is called as mould making. 
In sand casting process the mould is made up of sand material. 

4.Core making:
Core is the obstruction which is placed inside the mould in order to make hollow casting. 
Placed core inside the mould in order to make hollow casting. 
In sand casting process,  the core is of sand material. 

5. Melting and pouring of molten metal:
Melt the metal inside the furnace and pour the molten metal into the mould. 

6. Cooling and solidification:
After pouring the molten metal,  the mould is allowed to solidify. 

7. Cleaning and finishing:
After broken the mould,  the sand particles are stick on the casting components and they are removed by brush. 

8. Inspection:
To the inspection,  generally if defects are present, then is rejected.

casting, sand casting process.com

Cooling system.

COOLING  SYSTEM :-
The system which are used for controlling the temperature of IC engine is called as cooling system. 

TYPES OF COOLING SYSTEM:
1. Air cooling system.
2. Water cooling system.

Water Cooling System:-
In this system , water or coolent is used as coolent medium.

Fig. Shows the schematical diagram of water cooling system used in IC engine.
WORKING:
1. The cylinder of IC engine is surrounded by water jackets.
2. The water of coolent flows through the water jackets and absorb heat from cylinder. 
3. The hot water from engine flows through the radiator. 
4. Initially,  the hot water from water jacket comes in heat tank and flows through radiator tubes, where it loses the heat to surrounding cold air.
5. The cold coolent is collected in collector tank and is further supplied to the water jacket by using centrifugal pump. 

cooling system, water cooling system.

Suspension system.

SUSPENSION  SYSTEM :-

Location:
In automobile vehicles,  the suspension system is mounted between chasis and axle.

Function of suspension system:
* It isolate the vehicle body from road shocks.
* To isolate the passenger and cargos from the road shocks.
* To maintain the contact between the tyres and road.

TYPES OF SUSPENSION SYSTEMS:
● Leaf spring.
● Telescopic suspension system.
● Machperson.
● Double wishbone.

TELESCOPIC  SUSPENSION  SYSTEM :-

Fig. Shows the schematical layout of the telescopic suspension system. It consist of,
1.helical compression spring. 
2.hydraulic damper.

WORKING:-
1. In this suspension system the helical compression spring is made up of steel and this is mounted around the hydraulic damper.
2. Hydraulic damper is consisting of piston and cylinder arrangement,  which is completely filled with the oil.
3. During operation,  when road shocks acts on the vehicle and initially are absorb by helical compression spring and the oscillation of helical compression spring is restrict by hydraulic oil in the damper.

suspension system.

Pump

CENTRIFUGAL  PUMP :-
It is dynamic pressure pump.
Fig. Shows the schematical layout of centrifugal pump, It consist of-
1. Strainer.
2. Foot valve.
3. Impeller.
4. Suction pump.
5. Casing.
6. Blade.
7. Delivery pipe.
8. Electric motor shaft.

WORKING:-
Before starting of electric pump the whole pump including casing , delivery pipe, suction pipe are completely filled with water. 
This process is known as PRIMING PROCESS.
(for removing  air pockets.)

The start of electric motor causes impeller to rotate due to which the vaccum is to be created inside the casing.
Hence, the water from the sump enters into the casing through suction pipe.
The further rotation of impeller causes the water from the casing is deliver to overhead tank at high pressure.

pump