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Contents. Contents. Compressors for A/C Rotary Compressor Samsung Tropical Compressor Improved Compressor for India Failure Mode Analysis Compressor Check Procedure. 01. Compressors For Air Conditioner. Compressors for Air Conditioner. Discharge. Suction. Discharge. Suction.
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Contents Contents • Compressors for A/C • Rotary Compressor • Samsung Tropical Compressor • Improved Compressor for India • Failure Mode Analysis • Compressor Check Procedure
01 Compressors For Air Conditioner
Compressors for Air Conditioner Discharge Suction Discharge Suction Discharge Suction Suction
Efficiency Efficiency Rotary Reciprocating Scroll Refrigerator A/C System 0.5 3.0 5.0 HP
02 Rotary Compressor
Cut View Terminal Accum. Rotor Shaft Stator Balance Weight Top Flange Muffler Case Bottom Flange Cylinder Foot Cut View
Operating Principle Compression 90 。 Suction Vane Discharge Valve Cylinder Roller Shaft Compression 180 Discharge 270 。 。 Suction 0 (360 ) 。 。 Pump Assembly. Crank shaft Discharge Port Vane Crank shaft Eccentric Cylinder Roller Compressed Gas
03 SAMSUNG Tropical Compressor
Model Identification 55A2 4 0IT1EN ⓐ ⓑ ⓒ ⓓ ⓔ ⓕ ⓖ ⓗ ⓘ
Design Features High Torque Motor – Starting & Running • Increase the Running Torque • - Prevent the winding temperature rising • - Increase the maximum allowable discharge pressure • Increase the Starting Torque • - Improve the starting capability for low voltage area High Performance Protector • Internal OLP • - Set on the motor winding • → Improve the protection performance High Reliability Pump Parts • Coated Vane • Coated Shaft • High Durability Bearing
Design Features • High Efficiency - Energy Saving • - EER : 5 ~ 10% higher than Reciprocating Compressor • Light Weight - Easy installation & maintenance • - Weight : 30% Lighter than Reciprocating Compressor • Running Reliability - Extended Operation Range • - Maximum Allowable Discharge Pressure : 32 Kg/cm2 • → Corresponding Ambient Temperature : 54°C • Starting Reliability • - Improve the Starting capability for Low Voltage Area
Design Feature σ Max 900℃ Cylinder Welding Top Flange Welding 0 50 100 t [ 2’nd Generation Pump ] “Zero” Deformation EER 2% Up Top Flange Welding Cylinder Welding Heat Stress Analysis Change the 3 Point Welding - Cylinder → Top Flange - Minimize the deformation of parts by thermal shock in 3 point welding process
Safety & Reliability • Safety Certification • - For Gulf : Approved TUV and SASO • - For Saudi : Approved UL and SASO • Reliability Certification • - Acquire a Certification from Univ. of Maryland(USA) • - Subject : Tropical Compressor Reliability Evaluation • of Samsung Tropical Compressor • and Reciprocating Compressor • - Test Duration : 1,000 hrs Acceleration Test • (Continuous Run) • - Test Condition : Pd / Ps = 35 kg/cm2 / 7.3 kg/cm2, • Ambient Temperature = 54℃
Safety & Reliability [ Test Results ] Samsung Tropical Compressor Reciprocating Compressor Components Wear Rate(%) Judgment Components Wear Rate(%) Judgment Shaft 5% Excellent Shaft 200% Poor Roller 15% Good Connecting Rod 90% Not Satisfactory Vane 1% Excellent Wrist Pin 48% Good Upper Bearing 17% Excellent Lower Bearing 108% Not Satisfactory Lower Bearing 12% Good Upper Bearing 82% Not Satisfactory Cylinder 11% Excellent Piston 85% Not Satisfactory
Safety & Reliability - Certificate for Reliability & Performance
Compressor Comparison – For Gulf [ Specification ]
Compressor Comparison – For Gulf [ Actual Data ]
Compressor Comparison – For Saudi [ Specification ]
Compressor Comparison – For Saudi [ Actual Data ]
04 Trouble Shooting
Compressor Check Procedure [ Check Procedure whether Failed or Not ] [ First Check – Electric Performance ] 1. Purpose : To Check the Motor Winding 2. Remove the compressor wiring from the terminal 3. Clean up the compressor terminal 4. Check the Dielectric Resistance 5. Check the Motor Winding Resistance ( Ohm Tester) : Main and Sub
Compressor Check Procedure [ Second Check – Hammering Test ] 1. Check the “ hammering” of compressor only in CASE “1-A”, “1-C”, “1-E” from first check. 2. Remove the “S” wire in compressor terminal. 3. Compressor Run for Hammering Check. R ☞ Caution ! 1. Do not exceed 3 second for hammer test 2. Do not test in CASE “1-B”, “1-D”, “1-F” from first check. S C Remove the “SUB” Terminal 4. Judgment
Compressor Check Procedure [ Third Check – Running Test ] 1. Check the Running Test of compressor only in CASE “1-A” from first check. 2. Connect all wire in Compressor Terminal. 3. Compressor Run for running check. ☞ Caution ! 1. Compressor terminal cover must tightly fasten before test. 2. Do not exceed 10 second for Running test if compressor is removed already from the unit. 3. Do not test except in CASE “1-A” from first check. 4. Judgment
Final Judgment [ Final Judgment ]
Chattering Sound [ Symptoms ] When a rotary compressor is started, a “chattering” sound be heard for the first few seconds of operation. [ Vane Chattering Sound ] 1. Causes : Liquid Refrigerant being returned to the compressor. 2. Process - Liquid refrigerant is incompressible → Sudden rise of pressure in the Cylinder - Overpressure acts on the tip radius of the vane - Vane is lifted off the rolling piston - The pressure equalizes between the compressed and suction sides of the cylinder 3. This is called vane chatter and is a common characteristics of Rotary Compressor After few seconds, the chattering sound will be disappeared.
