Weak current College】 【the air conditioning with cooling technology law questions and answers reference 5 --- Power By】 【China power house network.

<br> 201, high and low pressure controller role is when the exhaust pressure is higher than the set value or suction pressure higher than the set value, cut off power supply allows the compressor to stop working. (X) <br> 201, .high and low pressure controller with two air Chamber. Respectively and the exhaust pipe and the compressor suction line. (∨) <br> 203, thermistor-type semiconductor temperature controller for two gas chamber, respectively and the exhaust pipe and the compressor suction line .. (∨) <br> 204, motor around team core insulation resistance test using 500V megohmmeter, cold resistance shall be not less than 2 M Ω. (X) <br> 205, WSZ-2-humidity regulator can be used for General .accuracy or precision constant temperature and humidity control, is not available for the comfort of air conditioning energy saving control. (X) <br> 206, heating and air conditioning-heating-heat pump heating, get the same thermal geothermal energy consumed. ( .∨) <br> 207, refrigerator compressor PTC starting relay and weight start relay can be used interchangeably. (∨) <br> 208, measurement of wet-bulb temperature, air flow rate of the recommended values for 5m / s. (∨ .) <br> 209, pressure controller can automatically reset. (X) <br> 210, comparison of Toshiba refrigerator temperature detection circuit of the amplifier output voltage Us and temperature adjustment circuit set voltage UR to determine compressor working state. (∨) < .br> 211, compressors using three-phase power supply, AC contactor primary coil circuit generally threaded with temperature controllers, pressure controllers, thermal relay contact switch, etc. (∨) <br> 212, temperature-regulating valve of liquid level sensor is .equipped with an electric heater in, immersed in the liquid, the liquid level is high then the valve to open degree, liquid-level low then the valve to open degree are sold or closed. (X) <br> 213, indirect effects of .electromagnetic valve of minimum open valve pressure difference bit 5 ~ 20Pa. (∨) <br> 214, freon system install time must take account of the oil. (∨) <br> 215, dew in the library outside of the low pressure pipe .insulation measures must be taken to prevent cold energy loss. (∨) <br> 216, thermostatic expansion valve sensor shall preferably installed in the evaporator tube not far away. (∨) <br> 217, refrigeration system to beautiful, pipe elbows can .be made to any angle. (X) <br> 218, refrigeration systems, piping using seamless steel pipe, thread connection more convenient. (X) <br> 219, system debugging, essence is adjusted too fluid throttle device size. (∨ .) <br> 220, freezer temperature requirements (10 ~ 15) Oc, thermostatic expansion valve to adjust to the return gas pipe of frost layer, which is the best. (∨) <br> 221, system start debugging, adjust the throttle .opening, as long as the exhaust pressure allows the compressor to work correctly, you should try to improve the inspiratory pressure. (∨) <br> 222, connection, refrigeration equipment, the system must be seamless. (∨) <br> 223 ., compressor suction pressure corresponding evaporation temperature is the temperature inside the cold store. (X) <br> 224, refrigeration equipment functioning, evaporator pipes on the ice than the frosting is good, because the temperature of the ice than cream temperature low. ( .X) <br> 225, intensify the evaporator, the heat absorption, fast temperature decrease. (X) <br> 226, intensify the condenser, reduces condensation pressure. (X) <br> 227, known throttle pore size, refrigeration equipment .producing about chilling out can be estimated. (∨) <br> 228, refrigeration system back into the trachea frosting to compressor block on the more favourable to the cooling compressor block. (X) <br> 229, installation of refrigeration equipment, join .pipe as short as possible. (∨) <br> 230, expansion valve, close to the evaporator, the better, and aims to reduce resistance. (∨) <br> 231, refrigeration system at run time, the suction pressure values for .the corresponding time evaporation temperature, so regular observation of inspiratory pressure. (∨) <br> 232, refrigeration systems, piping connection in two ways, namely, welding and threaded connection, the former for not removing a join, the latter as removable joins .. (X) <br> 233, refrigeration system trial run using R22 refrigerant compressor pressure should not exceed 1.27Mpa. (X) <br> 234, room air conditioner compressor motor adopts three-phase motor, generally do not set a specific start .unit. (∨) <br> 235, split-type air conditioner piping length increased cooling capacity will increase of losses. (∨) <br> 236, air conditioner evaporator temperature lower blowing winds and cold, room temperature, the faster, the .greater the cooling capacity. (X) <br> 237, new outlet should be located in the outdoor air cleaner, its bottom distance from outdoor flooring should be no higher than 2m. () <br> 238, air conditioner should be installed on .the short wall along the room long to air. (∨) <br> 239, air conditioner fuse current of air conditioner 1.25 times the rated current. (X) <br> 240, nominal cooling capacity of air conditioners are usually take over one .-way length 5m doing benchmarks. (∨) <br> 241, air-conditioner room ambient temperature not below 0oC and not above 40oC. (∨) <br> 242, air conditioners using three-phase four-wire system power supply, .power supply voltage deviations not exceeding the rated value of + -5%. (X) <br> 243, air conditioners tricking disk outlet shall take over, and with the condenser outlet connection with drainage. (X) <br> 244, air .conditioner factory, cooling capacity is smaller than the already filling a 40KW rated capacity of refrigerant. (∨) <br> 245, without refrigerant air conditioner installation is complete, you should turn to the system air pressure test, vacuum experiments and refrigerant leak found .. (∨) <br> 246, air conditioners using nitrogen gas pressure test should be filled, must not use oxygen. (∨) <br> 247, air conditioner refrigeration system for vacuum pick leak you can use the compressor system itself to vacuum .. (X) <br> 248, air conditioner evaporator temperature usually take 5 ~ 7oC, it can adjust the expansion valve opening. (∨) <br> 249, air conditioner heater and electric control indoor fan in, generally on the interlocking should .open the heater fan, open back. (X) <br> 250, temperature-desiccant machines ... recycling the entire water cooling dehumidifier for heating, cooling and cold cycles for joints and dehumidification. (X) <br>.