[Experience] What happens if the compressor suction pressure is too high and the discharge pressure is too high

[Experience] What happens if the compressor suction pressure is too high and the discharge pressure is too high Compressor suction pressure is too high, discharge pressure is too high 1. Too much refrigerant. Too much refrigerant will cause the suction pressure and discharge pressure to be too high at the same time. This is because when too much refrigerant fills the reservoir, it will occupy a part of the condenser volume, reducing the heat dissipation area and causing the condenser Poor condensation. Discharge excess refrigerant from the low-pressure side. 2. The opening of the expansion valve is too large, which reduces the throttling effect, the refrigerant cannot fully vaporize and absorb heat, causing the low-pressure pressure to rise, and liquid refrigerant flows back to the compressor, causing liquid shock. The adjusting nut of the expansion valve can be tightened by half a turn to two turns to adjust the low-pressure pressure to the normal range. 3. The suction valve of the compressor is broken, so that the compressor cannot suck the refrigerant gas in the evaporator, which will cause the low pressure to be too high. At this time, the compressor must be replaced. 4. The inlet air temperature of the evaporator is too high. When the ambient temperature is high, the return air temperature of the evaporator will also be high, so that the low pressure will also increase. At this time, the fresh air mechanism may be broken, and the fresh air door cannot be closed when it is opened. 5. Air is mixed in the system. Since the air is non-condensable gas, the air in the refrigeration pipeline will increase the system pressure. The treatment method is to completely release the refrigerant, re-evacuate, leak check, and add new refrigerant. 6. Expansion valve temperature-sensing package is not well-insulated or poorly bandaged, which will cause the expansion valve to open too much and make the low-pressure pressure higher. The temperature should be wrapped up again. 7. The condenser fan does not run, and the condenser fan should be repaired or replaced. 8. The air volume of the condenser fan is insufficient. It should be checked whether the fan circuit is in poor contact, whether the fan is blocked by foreign objects, and whether the condenser fins have too much dust, and the cause of the fault is found and eliminated. Compressor suction pressure is too high, discharge pressure is normal 1. The inlet air temperature of the evaporator is too high. When the ambient temperature is high, the return air temperature of the evaporator will also be high, so that the low pressure will also increase. At this time, the fresh air mechanism may be broken, and the fresh air door cannot be closed when it is opened. 2. If the opening of the expansion valve is too large, the opening of the expansion valve should be reduced. 3. The suction valve of the compressor is damaged. Replace the suction valve. 4. The expansion valve's temperature sensor is loose or poorly insulated, so it should be tightened to ensure good contact and strengthen the insulation protection.

Recent related posts

06/21/2020

[Experience] What happens if the compressor suction pressure is too high and the discharge pressure is too high

06/21/2020

Operation process of automobile air-conditioning refrigeration system and the role of pressure switch

Operation process of automobile air-conditioning refrigeration system and the role of pressure switch From top to bottom, automobile air conditioners are mainly composed of blowers, evaporators, pressure switches, dryers, expansion valves, condensers, and the most source compressors. The operation process of this air-conditioning system is: heat dissipation,

06/21/2020

Structure of rotary piston compressor_Characteristics of rotary piston compressor

Structure of rotary piston compressor_Characteristics of rotary piston compressor <img src="{{media url="Structure_of_rotary_piston_compressor_Characteristics_of_rotary_piston_compressor.jpg"}}" alt="" />Structure of rotary piston compressor 　　 Rotary piston compressor, also known as rolling rotor compressor, is mainly composed of 3 parts: casing, motor assembly and compressor assembly. Since there is no reciprocating part, the space volume can be reduced, making the whole structure compact and light.

06/21/2020

Working principle of reciprocating compressor_Working process of reciprocating compressor

Working principle of reciprocating compressor<img src="{{media url="Working_principle_of_reciprocating_compressor.jpg"}}" alt="" />_Working process of reciprocating compressor Working principle of reciprocating compressor 　　 Relies on periodic changes in the working volume of the cylinder to compress the gas to achieve the purpose of increasing the working pressure. (The reciprocating movement of the piston in the cylinder causes the decompression to suck the gas, and then compress the gas to a certain pressure and send it out.) The working principle of the piston compressor.

06/21/2020

Working principle of reciprocating piston compressor_Characteristics of reciprocating piston compressor

Working principle of reciprocating piston compressor_Characteristics of reciprocating piston compressor <img src="{{media url="wysiwyg/Working_principle_of_reciprocating_piston_compressor.jpg"}}" alt="" /> Reciprocating piston compressor 　　Positive compressor that changes the internal volume of the compression chamber by one or several reciprocating pistons.

06/21/2020

Structure of scroll compressor_Characteristics of scroll compressor

Structure of scroll compressor_Characteristics of scroll compressor Scroll compressor<img src="{{media url="wysiwyg/Structure_of_scroll_compressor_Characteristics_of_scroll_compressor.jpg"}}" alt="" /> 　　 Scroll compressor is a compressor with a compressible volume composed of a fixed involute scroll disk and an involute motion scroll disk that eccentrically rotates in translation.

06/21/2020

Electronic expansion valve application and installation precautions

Electronic expansion valve application and installation precautions <img src="{{media url="wysiwyg/Electronic_expansion_valve_application_and_installation_precautions.png"}}" alt="" /> Advantages of electronic expansion valve: The energy efficiency ratio is improved during high-frequency and low-frequency operation; the reliability of the compressor is improved, the conditions of oil return, liquid return, and exhaust temperature are too high; the operation of the whole machine is reliable, and the problems of water blowing, condensation, and overload are reduced. ; Increased adaptability to changes in refrigerant quantity; Enhanced comfort, short defrost time;

06/21/2020

Refrigeration, Air Conditioning Compressors: Reciprocating, Rotary, Screw, Centrifugal, Scroll

What is Refrigeration Compressor The compressors are one of the most important parts of the refrigeration cycle. The compressor compresses the refrigerant, which flows to the condenser, where it gets cooled. It then moves to the expansion valve, and the evaporator and it is finally sucked by the compressor again. For the proper functioning of the refrigeration cycle, the refrigerant must be compressed to the pressure corresponding to the saturation temperature higher than the temperature of the naturally available air or water. It is the crucial function that is performed by the compressor. Compression of the refrigerant to the suitable pressure ensures its proper condensation and circulation throughout the cycle. The capacity of the refrigeration or air conditioning depends entirely on the capacity of the compressor.<img src="{{media url="422C8FF7C729C6E9A7416FCA7C2EB508849153E1_large.jpg"}}" alt="" />

06/21/2020

Common system failures of refrigeration equipment

Common system failures of refrigeration equipment 1. Liquid return: For refrigeration systems using expansion valves, liquid return is closely related to the selection and use of expansion valves. Expansion valve selection is too large, the superheat setting is too small, the installation method of the temperature sensor is incorrect, the insulation bandage is damaged, and the expansion valve failure may cause liquid return.<img src="{{media url="Common_system_failures_of_refrigeration_equipment2.png"}}" alt="" />

06/21/2020

Composition principle of refrigeration system of refrigerator

Composition principle of refrigeration system of refrigerator Refrigerators have a larger cooling capacity than household refrigerators, and there are more refrigerants filled in the system. Therefore, a liquid storage tank is installed on the pipeline between the condenser and the filter, and a shut-off valve is installed on the tank to shut down the system for a long time. When closing the shut-off valve, the refrigerant liquid is stored in the tank.<img src="{{media url="Composition_principle_of_refrigeration_system_of_refrigerator.jpg"}}" alt="" />

Customers frequently viewed

IWAYA DENKI Water Pump 25CJT0752

US$2307.69

Panasonic Servo Motor MHMF022L1V2M

US$653.85

Honeywell Solenoid Valve VE4025B1045

US$334.62

ROTEN Mechanical Seal 8E5K-22-X

US$384.62

CKD Air Cylinder SCPG2-00-10-45

US$25.00

KAMASI Tool for Metal Cutting C25-ER32UM-150

US$54.46

HENGSTLER Encoder RI58-O/8000EK.42IA

Speck Water Pump CY-4281.0069

PANASONIC Capacitor 80V 8200UF

US$17.31

Bristol Compressor H79B18UABHY

TAIAN Relay RHN-10/21.5K1 24.5-30A

US$32.69

NIDEC Reduction Drive Gearbox Speed Reducer VRB-140C-50-K3-19EC16

Parker Denison Vane Pump T6D-020-2R00-C1

US$2975.00

KSK Oil SealTC(FKM)55X75X12

US$5.77

Related Info

[Experience] What happens if the compressor suction pressure is too high and the discharge pressure is too high

Recent related posts