Weak current College】 【the air conditioning with cooling technology law questions and answers reference 4 --- Power By】 【China power house network.

<br> 151, typically, single-stage freon compressor maximum compression ratio should not exceed 8. (X) <br> 152, single-stage vapour compression refrigeration system can only achieve the evaporation temperature-20 ~-40Oc. (∨) .<br> 153, two-stage compression-compression refrigeration system usually uses the level throttling intermediate full cooling loop. (∨) <br> 154, at the level of throttle intermediate full cooling system, high pressure compressor suction is intermediate pressure hot steam .. (X) <br> 155, intermediate incomplete cooling high-pressure compressor suction temperature will be higher than the intermediate full cooling of the air temperature. (∨) <br> 156, R717 maximum pressure difference to Pk-Po ≤ I. .6Mpa. (∨) <br> 157, R22 in high condensing pressure of maximum pressure difference to Pk-Po ≤ I.8Mpa. (∨) <br> 158, single-stage compression refrigeration system uses standard evaporation temperature-81.5oC refrigerant .R13 to low temperature, producing-75oC. (X) <br> 159. using R22 and two-stage R13 compression system consisting of cascade refrigerating system, its evaporation temperature up to-70 ~-90Oc. (∨) <br> 160 ., using two-stage compression system consisting of multiple overlapping refrigeration system, low-temperature extraction-140oC. (X) <br> 161. using ternary complex stack of refrigeration cycle can obtain-120 ~-150oC at low temperature. (X) .<br> 162, two-level vapour compression refrigeration cycle start the steps are: first start the low-pressure compressor, and then start the high-pressure compressor. (X) <br> 163, R717, two-level vapour compression refrigeration .system should take intermediate loop incomplete cooling. (X) <br> 164 and cascade refrigerating system startup step is: first start the temperature section, and then start the low-temperature parts. (∨) <br> 165, low-speed air .conditioning system with air channel system pipes wind of 3 ~ 5m / s. (X) <br> 166, without changing the humid air enthalpy-Sik, the wet air temperature, air humidity. (X) <br> 167, to air .enthalpy implantation unchanged conditions reduce the temperature of the air, it should be on the air humidification, ie increases the moisture content. (∨) <br> 168, refrigeration and air conditioning equipment product nameplate marking of cooling capacity to the actual cooling capacity. .(X) <br> 169, air conditioner, heat pump for heating and electric heating consumes power, according to the law of conservation of energy, consumes the same amount of energy they will get the same amount of heat. (X) <br .> 170, air conditioner evaporator temperature, low, and the greater the difference in indoor air, indoor air, the faster the temperature dropped. (X) <br> 171, use R22 of air-cooled air conditioner, the compressor suction and discharge .pressure of maximum pressure differentials not exceeding 1.56Mpa. (∨) <br> 172, using R12 refrigerant in the refrigeration equipment, the refrigerant in the evaporator of evaporation temperature-29.8oC. (X) <br> 173, high-temperature food .refrigerator of applicable temperature adjustment range 0 ~-10oC. (X) <br> 174, low temperature test equipment can provide-80 ~ 80oC temperature environment. (X) <br> 175, high and low temperature test equipment used for the simulation .of climatic conditions on the ground, environmental test equipment for analog high altitude meteorological conditions. (∨) <br> 176, mechanical freezers are direct evaporative air cooling to control the temperature inside the car. (X) <br> 177, insulated refrigerated .vehicles only and urban urban, suburban and short-distance transport, use limitations. (∨) <br> 178, mechanical refrigerating cars can maintain passenger compartment temperature-15-18oC. (∨) <br> 179, ice refrigerator car can adapt .to a variety of fresh freight, railway transport of frozen goods. (X) <br> 180, marine refrigeration equipment manufacturers must comply with the State of the marine construction norms and classification societies. (∨) <br> 181, ship refrigerated compartment .refrigeration system and food refrigeration system are often designed as parallel systems for emergency purposes. (∨) <br> 182, China's marine refrigerated container mm1A-built-in refrigeration unit type refrigerator. (∨) <br> 183, absorption chiller energy jump ., has many advantages. (X) <br> 184, chillers with a piston, screw and scroll, centrifugal, absorption, and many other categories. (∨) <br> 185, inverter type air conditioner circuit will input single phase AC 220V .50 Hz is converted to a different frequency single phase alternating current. (X) <br> 186, inverter type air conditioner use converter to change the compressor speed for compressor capacity control. (∨) <br> 187, constant temperature and humidity controlled .indoor relative humidity of the air conditioner is 50% ~ 70% control accuracy of + -10%. (∨) <br> 188, Cabinet cooler can control the indoor temperature is 18-25oC, control accuracy +-1oC. (X) .<br> 189, hot and cold air blower can be cooling, dehumidification, heating, humidifying. (X) <br> 190, machine room exclusively used air conditioner to meet 30 ~ 60 / h high ACH requirements. (∨) <br .> 191, centralized air conditioning air-conditioning room General requirements remain greater than the positive pressure 50Pa. (X) <br> 192, centralized air conditioning system also known as full air system. (∨) <br> 193, room air conditioner .compressor motor with a phase motor, generally do not set a specific start unit. (∨) <br> 194, Toshiba refrigerator temperature sensor is a negative temperature coefficient thermistor, when the temperature decreases to increase its resistance. (∨) <br> .195, split-type air conditioner control circuit from the primary circuit and outdoor side circuit made up of two parts. (X) <br> 196, Toshiba refrigerator power circuit, DC voltage for relay use 6.8V, DC 14V voltage workers three- .tube and integrated circuits. (X) BR> 197, Toshiba refrigerator when exposed to temperatures gradually decreases, temperature detection circuit output voltage Us will improve. (X) <br> 198, Toshiba transformer T801 refrigerator will input AC 220V voltage to voltage DC .16V. (X) <br> 199, air-conditioner choose strong cold or weak cold is the fan speed by varying the indoor, change the exhaust volume. (∨) <br> 200, heat pump air conditioner defrosting by reversing valve to .achieve, it is not necessary to separate the temperature of heating wire to defrost. (∨) <br>.