Comparison of R407c Refrigerant and R22 Refrigerant

R407c is a mixture of R32 refrigerant and R125 refrigerant plus R134a refrigerant in a certain proportion. Compared with R22 refrigerant, it is an environmentally friendly refrigerant that does not destroy the ozone layer, and it is also an HFC refrigerant used to replace R22 refrigerant. Although the performance of R407C refrigerant and R22 refrigerant is very familiar, there are many differences between R407C refrigerant and R22 refrigerant.

1. R407C is a mixed refrigerant, and R22 is a single refrigerant.

2. R407C does not destroy the ozone layer and is an environmentally friendly refrigerant. However, the R22 refrigerant is very harmful to the ozone layer and is currently being replaced gradually.

3. R407C has an evaporating pressure very close to that of R22, but the condensing pressure is slightly higher than that of R22.

4. Studies have shown that the relative thermal conductivity of R407C is 83% of that of R22 during evaporation, and the relative thermal conductivity of R407C during condensation is 85% of that of R22.

5. Due to the influence of thermal conductivity and evaporation temperature and condensation temperature under the same pressure, the heat exchange capacity of R407C system is worse than that of R22 under the same heat exchange area. To achieve the same capacity and COP, the area of ​​the heat exchanger must be increased (about 10%).

6. The charging amount of R407C refrigerant is 90%-95% of that of R22 refrigerant.

7. Generally speaking, the suction pressure of R407C refrigerant is lower than that of R22 refrigerant.

8. The discharge pressure of R407C refrigerant is higher than that of R22 refrigerant.

9. The COP value of R407C refrigerant is lower than that of R22 refrigerant.