Zimmer Cryo 6 Evaporator 

The Zimmer Cryo 6 Evaporator use the heat around it to produce the -30c chilled air coming out of the Zimmer Cryo 6 Hose. When the R507 refrigerant, a fluid used with the Zimmer Cryo units, leaves from the compressor, it goes through a tiny hole as a liquid. The low pressure of the Zimmer Cryo 6 Evaporator allows the R507 refrigerant to expand and cool down, becoming a gas.  As the refrigerant is changing from liquid to gas, the therapy fan is delivering warm air from around the Zimmer Cryo 6 unit over the coils filled with the gas.  The cooler gas catches the heat molecules, creating condensation on the coils.  A therapy fan blows air over the coils and that air becomes chilled and flows out the Zimmer Cryo 6 Hose.  As the air from the therapy fan blows over the coils and through the vents, the air becomes much very cold.  The gas in the Zimmer Cryo 6 Evaporator coils continues to the front of the Zimmer cooling system and repeats the process until the set temperature is reached. By extracting the heat from the Cryo 6 Evaporator, the room air drawn in by the filter into the therapy fan can now be available as refrigerated therapy air.    A defrost drain is installed at the bottom of the Zimmer Cryo 6 Evaporator to assist in draining any defrosted water.

Zimmer Cryo 6 Evaporator

The function of the Zimmer Cryo 6 Evaporator is completed opposite of the Cryo 6 Condenser, as previously mentioned the R507 refrigerant is converted from liquid to gas by absorbing heat from the air in the unit.  Because the evaporator job is to absorb heat into the refrigeration system, the Cryo 6 Evaporator is placed in the area to be cooled. The Zimmer Cryo 6 Evaporator is the part of the refrigeration system that is doing the actual cooling.  The Zimmer Cryo 6 Evaporator is the last device in the refrigeration cooling system of the Cryo unit, and the coils are used to transform the R507 refrigerant from a liquid to a gas.  The liquid refrigerant of the Cryo 6 cooler, R507, boils at a low-pressure within the evaporator.  The level of the low pressure is determined by the rate at which the heat is absorbed from the Cryo 6 to the R507 in the evaporator, and the rate at which the low-pressure vapour is removed from the evaporator by the compressor.  To allow the heat to transfer, the temperature of the R507 in liquid refrigerant state must be lower than the temperature of the product being cooled.

Cryo 6 Evaporator

Zimmer Cryo 6 Refrigeration System 

There are six basic components of the Cryo 6 refrigeration system:

  1. Evaporator
  2. Compressor
  3. Condenser & Condenser Fan
  4. Expansion Valve
  5. Therapy Fan 
  6. R507 Refrigerant

In order for the Zimmer Cryo 6 refrigeration cycle to operate successfully, each refrigeration component must be present and working optimally.  During a refrigeration cycle refrigerant flows through the Cryo 6 Compressor, which causes an increase in pressure of the R507 refrigerant.  The R507 than streams through the Zimmer Cryo 6 Condenser where it condenses from a vapor state to a liquid state, giving off heat in the process.  The heat that is dissipating during this process causes the condenser to feel “hot to the touch.”  The Cryo 6 has a condenser fan located inside the unit (close to the condenser) to ensure the condenser doesn’t get overheated.  After the refrigerant flows through the Zimmer Cryo Condenser, the refrigerant goes through the Cryo Six Expansion valve, where it experiences a pressure drop.  Finally, the refrigerant goes to the Zimmer Cryo 6 Evaporator.  The R507 refrigerant draws heat from the evaporator which causes the refrigerant to vaporize.  The Cryo 6 Evaporator draws heat from the region that is to be cooled.  The refrigeration cycle restarts again once the vaporized refrigerant goes back to the Cryo compressor.

Therapy Fan, Expansion Valve, Combi Drier

Zimmer Cryo 6 Therapy Fan

The Zimmer Cryo 6 Therapy Fan plays an integral part to the performance of the Cryo 6 Evaporator. The therapy fan does not only draw heat-laden air into the evaporator, but also forces this air over the Cryo 6 Evaporator fins and coils, where it surrenders its heat to the refrigerant and forces the cooled air out of the evaporator and into the Cryo 6 Hose.

Zimmer Cryo 6 Therapy Fan

Zimmer Cryo 6 Expansion Valve

The Zimmer Cryo 6 Expansion Valve controls the flow of the liquid R507 refrigerant into the Cryo 6 Evaporator.  The Cryo 6 Expansion Valve controls the superheating at the outlet of the evaporator, and is responsive to the temperature of the refrigerant.  Expansion valves are flow-restricting devices that cause a pressure drop of the working fluid, and are generically referred to as metering devices.
Zimmer Cryo 6 Expansion Valve

Zimmer Cryo 6 Combi Drier

The Zimmer Cryo 6 Combi Drier is a drier that performs two functions:
1.  Filtering out particles – The filter function of the Zimmer Cryo Combi Drier serves as physical protection, and includes retention of particles and any type of impurities.
2.  The drying function – The Zimmer Cryo Drier removes and holds moisture to prevent unwanted vapor from circulating through the refrigeration system.   The drier also provides chemical protection and includes the adsorption of water and acids during the drying function.

Zimmer Cryo 6 Combi Drier

Zimmer Cryo 6 Evaporator Sensor

The Zimmer Cryo 6 Evaporator Sensor can determine the temperature inside the evaporator.  The evaporator must meet a certain load and temperature in order for the Cryo operator to start using the Cryo 6 unit.  The Cryo 6 Evaporator Sensor connects inside to the CPU/ Power Board.

Zimmer Cryo 6 Evaporator Sensor

The Zimmer Cryo 6 Evaporator is to be purchased only for the Cryo 6 cooler.  The Cryo 5 has a different evaporator all together.  The evaporator should be installed only by a licensed and certified technician.  When replacing the Cryo 6 Evaporator one should consider replacing the Filter Dryer, Evaporator Sensor, and Thermostatic Expansion Valve as well.