Weak current College】 【fault repair tools commonly used in air conditioning.

<br> <br> 1, pressure gauge <br> Refrigerant leakage is the common failure of air conditioners, as the amount of refrigerant in the system is sufficient for testing, common to the pressure gauge, the pressure gauge is freon cooling system commonly .used by detection tools, it's a shell diameter from 60mm ~ 250mm, there are a variety of specifications for air conditioner refrigeration system and the use of vacuum pressure gauge range to 0.1MPa ~ 2.5MPa, pressure gauges and three links to repair the valve clockwise .tee repair valve knob, you can make the valve hole shrinks, the knob clockwise to the end, the corresponding piping and outdoor unit gas shut off, counterclockwise rotation knob, the valve hole expansion, the appropriate tubing and outdoor group gas conduction, refrigeration system .and tee repair valve pressure gauges are always on, regardless of the position of the knob, and tee repair valve switch, you can implement on refrigeration system vacuum, charging refrigerant and test pressure, etc. <br> <br> 2, Expander < .br> Two copper tube butt, you need a copper tube insert another copper tube, then often need to be inserted into the copper tube inner diameter of the end of the order to swell, another copper tube to fit in, the only way to make .two copper tube welding firm, and is not prone to leakage, Expander effect is based on the needs of different specifications of copper tube to tube expansion. Expanding, first be annealed copper tube in tube clamp the corresponding aperture, copper tube out of the jacket .pipe clamp's length with the diameter varies depending on the diameter of a large copper tubes, inflatable tube length should greatly, pipe diameter small copper pipe, tube length is smaller, F 8 copper tubes, inflatable tube length 10 mm or so, and tighten the .clamp pipe clamp ends of nut, brass is firmly clamped, insert the desired diameter of the tube head, slowly clockwise rotation of the screw Expander, expansion to the desired length, Expander <br> <br> 3, belling machine <br> Flaring .is used to spread for brass trumpet to piping will split-type air conditioner indoor and outdoor unit, flaring, first be annealed copper tube set on connection nut, then put the clip on the copper tubes in tube clamp the corresponding aperture, copper tube reveal .clamp height to one-fifth of the copper pipe diameter, and tighten the clamp pipe clamp ends of nuts, flared top of tapered head pressure in the tube, the slow rotation of the screw clockwise, the tube extrusion to trumpet <br> <br .> 4. cut pipe cutter <br> When the repair install air conditioning, it is often necessary to use to cut pipe cutter cutting of different length and diameter of the copper pipe, pipe cutters have different specifications <br> Cutting of copper tubes, .copper tubes onto cutting pipe cutter, two wheel clockwise between the feed button, place the copper pipe stuck in cutting knife and a scroll wheel, and then rotate the feed button edge, edge go round the copper pipe rotating cutting pipe cutter, rotate the feed .button, hard to even mild, or it may be copper pipe extrusion, copper tube cutting as well as reamers will spout to remove the Burr on the edge to prevent copper scraps into the refrigeration system. <br> <br> 5. pipe Bender .<br> Pipe Bender is used to change the shape of copper pipe, copper tube processing to desired shape tools, pipe Bender has size specifications for bending radius smaller than 20 mm copper pipe, elbow, the first has annealed copper tube into the pipe Bender .wheels slot, the jacket pipe hook locking, and slowly rotate the handle until the desired angle, <br> <br> 6. gas welding equipment <br> Air conditioner cooling systems use copper tube, the maintenance required to use the traditional gas welding ., gas welding equipment using oxygen and acetylene gas mixture, producing high-temperature flame lit, now more use of liquefied petroleum gas, oxygen combustion gas welder for welding of the refrigeration system pipeline, gas welding equipment is mainly made of cylinders, connection hose and .nozzle 3 components. <br> <br> 7, clamp meter <br> Clamp meter is a very wide range of measuring instruments, refrigeration equipment, electrical troubleshooting the most commonly used tools, it can measure AC or DC voltage, AC current, .resistance, etc. <br> ①, AC and DC voltage measurement <br> First switch to AC voltage (ACV) or DC voltage rail (DCV), and select is greater than the measured voltage range, and then put a red-black .table respectively insert test power supply outlet Jack, panel displays digital is the measured voltage value, AC voltage polarity is not fixed, so you can clamp meter table amount irrespective of positive and negative. Measuring DC voltage, you should switch to rotate to the DC .voltage rail (DCV) and note the select is greater than the measured voltage range, also make sure the polarity of the measured voltage, measurement, red table amount received voltage cathode, the black table amount received voltage anode, if the table amount received wrong .polarity, clamp meter can be damaged. <br> <br> ②, measurement of AC current <br> Will switch to the AC current (ACA) suitable measuring range, the measurement as long as the measured electric wire clip in its clamp slot ., using the principle of electromagnetic induction, the display will indicate the current strength of the wire. <br> <br> ③, measuring resistance <br> Rotate the switch to the appropriate range, the measurement before the two table pen direct connectivity ( .shorted), then display readings should be 0 Ω and issued chirping, if the display number is not 0 Ω, clamp meter damage or shortage of power, the measurement, the table amount was received in measuring resistance ends, the number that is displayed on .the screen to be logging resistance values. <br> <br> <br> <br>.