制冷原理(中英文對照)

1、制冷原理培訓教材Refrigeration principletraining material一：制冷原理簡介Refrigeration principle本系統(tǒng)屬于蒸汽壓縮式制冷循環(huán)，主要包括壓縮機、冷凝器、毛細管、干燥過濾器、蒸發(fā)器5個部件，經(jīng)過壓縮、冷凝、節(jié)流、蒸發(fā)四個過程不斷循環(huán)，制 冷劑周期性的發(fā)生從蒸汽變?yōu)橐后w，從液體變?yōu)檎羝臓顟B(tài)變化，不端的把冰 箱內(nèi)的熱量轉(zhuǎn)移到冰箱外部，從而達到制冷目的。The appliance incorporates a vapor compressor refrigeration system that consists of compressor;

2、 condenser, capillary, filter drier and evaporator and accomplishes the refrigeration through the cycle of compression, condensation, throttling, and evaporation. The process repeats and extracts the heat from the fridge compartment by having the refrigerant evaporated in the evaporator and liquefie

3、d in the condenser.1- Compressor2- Condenser3- Dry Filter4- Capillary Tube5- Evaporator二：主關件簡介:Main components（一）：壓縮機Compressor制冷系統(tǒng)的“心臟”，起壓縮和輸送制冷劑的作用，目前所用為往復活塞式壓 縮機。Serving as the heart of the refrigeration system, the compressor functions through compressing and passing the refrigerants A reciproca

4、l compressor is adopted in the system.主要性能指標Performance1:制冷量:壓縮機工作時,每小時從被冷卻物體帶走的熱量以（千焦/小時）活或瓦 表示.制冷量大小隨工況條件變化，工況條件不同制冷量大小不同.1 . Cooling capacity: refer to the heat in kilojoule/hour extracted from the articles to be cooled down in an hour The cooling capacity changes along with the operating conditi

5、ons*2 .功率,是指壓縮機每小時耗功的大小.Power: refer to hourly power consumption of the compressor.3,性能系數(shù)COP:性能系數(shù)就是制冷量與:壓機輸出功率大小之比,COP越大說 明耗電量越小，冰箱越節(jié)能.COP: refer to the cooling capacity - output power ratio. The higher the COP value, the lower the energy consumption* 壓縮機三個重要附件：Three essential accessories:1 .啟動控制器St

6、art control電冰箱剛開始啟動時,PTC元件溫度較低，電阻小，啟動繞組接通，由于啟動電 流大,PTC溫度隨之升高，當達到臨界溫度電阻猛增到數(shù)萬歐姆,可視為斷路. 于是與之串聯(lián)的起動繞組斷電，運轉(zhuǎn)繞組正常工作.PTC是一種無觸電開關, 但停機后由于PTC溫度仍很高,所以無法馬上啟動.The PTC element has a low temperature and small resistance when the appliance starts. The starting winding is energized. The PTC temperature rises along wi

7、th the increase of the starting current and reaches the threshold temperature when the resistance comes up to thousands of ohms, which is deemed as an open circuit. Then the starting winding in series with the PTC opens and the running winding works normally. PTC is a no-touch switch. When the appli

8、ance is turned off, it cannot start immediately because the PTC temperature is still very high.2 .過載保護器Overload protector過載保護器是用來防止壓縮機過載和過熱而燒毀電動機而設置的，海爾壓機一般采用碟形保護器.The overload protector is used to prevent overheating of the compressor that may cause burning-out of the motor. Haier compressor genera

9、lly usebutterfly protector3 .啟動電容器Starting capacitor（二）.冷凝器Condenser冷凝器將從蒸發(fā)器中吸收的熱量連同壓機耗工所轉(zhuǎn)化的熱量在冷凝器中釋放到空氣中，使壓縮機排出的過熱蒸汽冷卻為過冷液體.The refrigerant parts with its heat absorbed from the evaporator and the waste heat produced during the operation of the compressor. The heat is released into the open air and

10、 the overheat vapor from the compressor is condensed into overcool liquid*I.內(nèi)藏式冷凝器是由銅管制成的盤管貼附在U殼內(nèi)側(cè)而成.The condenser consists of coils made of copper pipe affixed to the U-shaped shell （三）.干燥過濾器Filter drier干燥過濾器是利用“分子篩”的吸附作用來去除制冷系統(tǒng)中的水分,酸質(zhì)機雜質(zhì)，以防止制冷系統(tǒng)冰堵或臟堵,一般采用釬焊焊接在冷凝器出口和毛細管之間.The working principle of f

11、ilter drier is to make use of the absorptionaction of molecular sieve to remove the moisture and impurities from the refrigeration system against blockage due to ice or impurities. The filter drier is usually soldered between the condenser outlet and the capillary tube.（四）.毛細管Capillary tube毛細管因為細而長,

12、所以對制冷劑有一定阻力，一方面可使制冷劑降壓，一方 面又可在一定范圍內(nèi)限制流量，有一定的自補償能力，在冰箱停止運轉(zhuǎn)后，可 起均壓作用，使高低壓壓力趨向平衡，便于下次啟動。Capillary tube is the metering device of the refrigeration systeim It has a bore of 0. 62. Omm and a length of L 54. 0m. Thin and long, the capillary tube accomplishes the reduction in pressure from the condenser to the evaporator by using the pressure drop or friction loss through a long small opening. The pressures through the system tend to equali