P1 + P4 = P2 + P3 P1 = Bulb Pressure (Opening Force) P2 =
Evaporator Pressure (Closing Force) P3 = Superheat Spring Pressure (Closing Force) P4 = Liquid Pressure (Opening Force)
Not exact matches
If it's on the high
pressure side right before the
evaporator, it's a TXV system and the accumulator is actually a liquid receiver, otherwise it's an OT system.
In any case: - High hot
evaporator airflow raises evaporator temperature - Evaporator temperature expands the magic juice in the TXV bulb - TXV bulb pressure opens liquid refrigerant flow into the evaporator - Refrigerant expasion in the evaoprator removes heat from the airflow
evaporator airflow raises
evaporator temperature - Evaporator temperature expands the magic juice in the TXV bulb - TXV bulb pressure opens liquid refrigerant flow into the evaporator - Refrigerant expasion in the evaoprator removes heat from the airflow
evaporator temperature -
Evaporator temperature expands the magic juice in the TXV bulb - TXV bulb pressure opens liquid refrigerant flow into the evaporator - Refrigerant expasion in the evaoprator removes heat from the airflow
Evaporator temperature expands the magic juice in the TXV bulb - TXV bulb
pressure opens liquid refrigerant flow into the
evaporator - Refrigerant expasion in the evaoprator removes heat from the airflow
evaporator - Refrigerant expasion in the evaoprator removes heat from the airflow -(Repeat)
Ice crystals block the airflow, less heat is absorbed into the
evaporator, more ice is formed, less airflow... The TXV bulb will radically drop in
pressure as the evap temperature approaches freezing, and cause the TXV to completely shut off liquid refrigerant flow into the
evaporator to prevent this condition.
With a TEV system, the spring inside the TEV allows a certain superheat value to be maintained, and the sensing bulb in contact with the
evaporator's outlet raises the valve's needle allowing more liquid refrigerant inside the
evaporator when the outlet becomes warm and less when it becomes cold, all of this resulting in a vapour with a certain superheat and
pressure at the
evaporator's exit and therefore in the suction line.
If a larger mass of warm air has to pass through it, more energy is transferred, through the
evaporator's fins (so that even the
evaporator's design and, in particular, its exchange surface play an important part) from the air to the liquid refrigerant allowed inside it by the TEV or orifice tube so it expands more and, along with the absolute
pressure inside the
evaporator, the refrigerant's vapor superheat (the delta between the boiling point of the fluid at a certain absolute
pressure and the temperature of the vapour) increases, since after expanding into saturated vapour, it has enough time to catch enough heat to warm up further by vaporizing the remaining liquid (an important property of a superheated vapour is that no fluid in the liquid state is carried around by the vapour, unlike with saturated vapour).
Unfortunately I think this is a moot point now because I came home yesterday to dial in the low
pressure switch to fine tune when the compressor kicks on and off and saw immediately that the spring lock fitting from the condenser to the
evaporator had blown off!
Includes
evaporator, accumulator, orifice tube, hose assembly and
pressure safety switch.
HVACAC Compressor Rebuilt (Converted to R134)- New Blower Motor (VDO / Siemens)- Condenser (Denso)- Expansion Valve (Denso)-
Evaporator Core (Denso)- Reciever / Drier (Denso)-
Pressure Switch - Blower Motor Resistor 4.)
Compressor, condenser, compressor clutch, pulley, clutch coils, poa valve,
evaporator, drier, accumulator, orifice, temperature control programmer, idler pulley, blower motor, hi / low
pressure cut off switch, (only factory and dealer installed equipment will be covered.
I think you left out the condenser (
pressure)
evaporator (tropopause) and air cooled radiator, (stratosphere).
The refrigerant comes into the
evaporator coil as a liquid at a low temperature and low
pressure.
The job profile also includes drilling holes through interior panels, connecting hoses to
evaporator and cool - air outlet, filling compressor with start units and refrigerant, threading hoses through holes and measuring compressor
pressure by using gauge.
PROJECTS Verso Paper, Jay, ME: «A»
Evaporators Instrumentation Upgrade: Designed the installation of (12) temperature transmitters w / RTD thermowells and (10)
pressure transmitters in the mill powerhouse.