The kinds of refrigerants and leak detection method

refrigerant is also called the refrigerating agent, on the south side of some areas known as snow. It is a cycle in the refrigeration system and through its own status changes to complete the homework that the refrigeration material. Refrigerant in transpiration in absorption cooling medium ( With air or water, etc. ) Heat and evaporation, in the heart of the condenser heat transfer to the surrounding air or water and condensation.

the variety of refrigerant: ( 1) Inorganic compounds. Water, ammonia, carbon dioxide, etc. （ 2) Full hydrocarbon derivatives, commonly known as freon. Mainly methane and ethane derivatives. R22, everything, etc. （ 3) Saturated hydrocarbons. Such as propane and isobutane. （ 4) Not full hydrocarbons. Such as ethylene, propylene, etc. （ 5) Azeotropic mixture refrigerants. Such as r114, etc. （ 6) Non azeotropic mixed refrigerants. Such as R407c, R410 etc. According to the standard of refrigerant evaporation temperature, usually is divided into high, medium and low temperature. Transpiration temperature specification refers to regulate transpiration temperature under atmospheric pressure, also is the boiling point.

a low-pressure high-temperature refrigerant: transpiration temperature above 0 ℃, condensing pressure lower than that of 29. 41995×104Pa。 This kind of refrigerant applies to tightening of centrifugal refrigerating machine in the air conditioning system. Medium pressure medium temperature refrigerant: transpiration temperature - 50 ~ 0 ℃, condensing pressure ( 196. 113-29. 41995). ×104Pa。 This kind of refrigerants are used for general tightening single-stage and two-stage tightening piston refrigeration system. High pressure low temperature refrigerant: transpiration temperature below - 50 ℃, the condensing pressure is higher than 196. 133×104Pa。 This kind of refrigerant is suitable for low temperature part of the complex overlapping refrigeration equipment or - under 70 ℃ low temperature equipment. Refrigerant leakage detection? Visual: find somewhere system have oil stains, perhaps for the leakage point. There is a big flaw, Ohio and cracking funnelled unless system, and system leakage is the colored liquid medium, visual leak detection can't positioning, because of the leakage of local is very slender, and many parts of the refrigeration system can see. Perhaps two, bubble water water leak detection: filling the 10 - to the system 20 kg/cM2 pressure of nitrogen, and then the system each part coated with soap and water, bubble point is the leakage point. This method is the most common mechanic leak detection method, but the man's arm is limited, people of vision scope is limited, can't see the funnelled a many time background. Three, nitrogen water leak detection: filling the 10 - to the system 20 kg/cm2 pressure nitrogen, put the system into the water, the bubble point is the leakage point. The run method of the defect: leak detection using the water enters the system simple, lead to system within the materials by corrosion, high pressure gas together it is also possible for the system form the greater harm, for leak detection when the intensity of labor is very big also. Four, fluorescent leak detection: it is the use of fluorescent leak detection agent in the uv/blue earth lamp light will announce the principle of bright yellow green, for all kinds of system of fluid leakage testing. When use, just put the fluorescent agent according to share must be added to the system, system operation after 20 minutes to wear special glasses, with earth lamp shining system outside, leakage will yellow fluorescence. Five, the differential pressure of gas leak detection: use system inside air pressure difference, the differential pressure sensor to expand, expressed by means of digital or sound or electronic signals leak detection results. This method is only 'qualitative' to know whether the system leakage and cannot find funnelled accurately. Six, halogen leak detection: the lamp lit leak detection, the air on the handheld halogen lamp tube, when nozzle system leakage, close to the flame color to purple blue, which indicate here have a lot of leakage. This way is open, not only is risk, and the flame is combined with refrigerant can produce harmful gases, moreover also difficult to accurately locating funnelled. So no one can use this way now. Seven, electronic leak detector leakage: electronic leak detector is a reliable leak detector, because of the leak detection precision quickly occupy the market over the years, when used with a probe to the possible leakage of local mobile, announced the alarm when the leak detection equipment, namely mark here have leaked. Using electronic leak detector for leak is the most rapid leak detection method of simple science now.