Sign of air-conditioner refrigeration system

freezers in our life, is already commonplace. You have much knowledge of air-conditioner refrigeration series? Must have a lot of customers don't know, just below and take a look at the cooler price, air-conditioner refrigeration series mark what are. They would do the enemy and know yourself, freezers when the choose and buy, can also be a reference. ( 1) Refrigerating machine starts, cylinder without noise, only the valve plate of ups and downs. ( 2) Condenser water pressure should be 0. More than 12 mpa. ( 3) The new series of products oil pressure is higher than suction pressure 0. 15 - 0. 3MPa； The old oil pressure is higher than suction pressure zero series products. 05 - 0. 15MPa。 ( 4) Ammonia machine suction temperature higher than the evaporation temperature of 5 - 10℃； Fluorine machine is highest do not exceed 15 ℃. ( 5) Cylinder wall should not be partial fever or frost. ( 6) Crankcase temperature does not exceed 70 ℃, ammonia machine does not exceed 65 ℃. ( 7) Supermarket of air-conditioner refrigeration machine exhaust temperature: ammonia ( R717） R22 does not exceed 135 ℃ : R12 does not exceed 110 ℃ : R13 does not exceed 125 ℃. ( 8) The condensing pressure: ammonia ( R717) R22 is not more than 1. 37MPa； R12 is less than 1. 18MPa。 ( 9) Accumulator liquid level indicator is not lower than l / 3. ( 10) Oil separator automatically return pipe when cold when hot, cycle for l hour or so. ( 11) Condenser upper, lower cold. ( 12) The evaporator pressure and suction pressure phase approximation. ( 13) Under a certain water, cooling water in and out of the temperature difference. ( 14) Supermarket freezers refrigerator good seal, no oil leakage phenomenon. ( 15) Bearing shaft seal does not exceed 70 ℃. ( 16) Uniform expansion valve body frost, but not frosted imports. ( 17) Each instrument stability is normal. This is a good quality of air-conditioner, refrigeration series needs to have its logo.
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