CO2 4-Way Directional Valve

The main medium of CO2 4-way directional valve is R744.

Feature and Benefits

Good performance

  • Direct drive of the motor for feedback on the spool position.
  • It can replace 4 SOV valves, which greatly reduces system costs.

 

High reliability

  • Using automotive grade electronic components, safe and reliable.
  • Multi-dimensional evaluation and validation based on vibration, temperature and humidity.

 

With integrated chip and more compact structure

 

Software design

  • With layered architecture design, comply with vehicle specifications.
  • Precise control of small opening flow based on software compensation.
  • Using UDS fault diagnosis processing system.
Application

The CO2 directional four-way valve realizes the mutual conversion between refrigeration and heating by changing the flow direction of the refrigerant in the system pipeline.

Operate
Basic Principle

When the air conditioner is in the refrigeration state, the four-way valve is not energized (initial state),the four-way valve is in the state of AB connection, DC connection, the refrigerant is compressed by the compressor into high temperature and high pressure gas, through the A port of the four-way valve, discharged from the B port, into the outdoor heat exchanger (condenser), after the condenser absorbs cold and heat release, it becomes a medium temperature and high pressure liquid, after passing the expansion valve, it becomes a low temperature and low pressure liquid, after the indoor heat exchanger (evaporator) endothermic and cooling action, it becomes a low temperature and low pressure gas, through the four way valve D port, Return to the compressor from port C and continue the cycle.

When the air conditioner is in a heating state, the four-way valve is energized, the motor drives the valve core to move, so that the AC is connected, DC is connected, the refrigerant is compressed by the compressor into high temperature and high pressure gas, through the A port of the four-way valve, discharged from the C port, into the indoor heat exchanger (condenser), after the condenser absorbs cold and releases heat, it becomes a medium temperature and high pressure liquid, after the expansion valve becomes a low temperature and low pressure liquid, after the outdoor heat exchanger (evaporator) heat absorption and cooling action, it becomes a low temperature and low pressure gas, passes through the four way valve port D, and returns to the compressor from port B , and continue the loop.

Packaging Options

Custom packaging can be provided to meet any need, please contact KESENS Engineering for details.

Functional Characteristics

ITEMS

 PARAMETER

Communication Method LIN2.1

Valve Port Diameter

8mm
Working Medium R744&PAG

Ambient Temperature

-40℃~+165℃
Temperature Range -40℃~+105℃

Operating Voltage

DC9V~DC16V
Rated Voltage DC12V

Rated Current

< 0.5 A
Coil Drive Method Stepper motors

Drive Frequency

100PPS
External Leakage ≤1g/y @ 10.5MPa

Internal Leakage

≤100ml/min @ 10.5MPa
Commutation Differential Pressure ≥5MPa

Maximum Working Pressure

17MPa
Burst Pressure 34MPa

Valve Opening Time (Off - On)

11.6s
Flow Resistance Pressure loss≤100kpa
Insulation Resistance ≥10MΩ
Lifetimes >10K cycles