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    汽車空調的高壓性能受什么影響?

    來源:http://www.philiprobert.com發布時間:2020-03-10 15:06:53

      高壓是如何產生的?為了保證汽車空調的正常循環,蒸發和吸熱的氣態制冷劑必須重新轉化為液態制冷劑,而液化(冷凝)是滿足溫度和壓力兩種條件所必需的。
      How is high pressure generated? In order to ensure the normal circulation of automobile air conditioning, the vaporized and heat absorbed gaseous refrigerant must be converted into liquid refrigerant again, and liquefaction (condensation) is necessary to meet the two conditions of temperature and pressure.
      溫度條件:在冷凝過程中,氣態制冷劑的溫度必須降低到臨界溫度以下。例如,R134a的臨界溫度為101℃。在這個溫度以上,壓力太高而不能凝結。
      Temperature conditions: in the process of condensation, the temperature of gaseous refrigerant must be reduced below the critical temperature. For example, the critical temperature of R134a is 101 ℃. Above this temperature, the pressure is too high to condense.
      壓力條件:冷凝過程中,系統必須保持一定的冷凝壓力,否則無法實現冷凝。


      Pressure condition: in the process of condensation, the system must maintain a certain condensation pressure, otherwise condensation cannot be realized.
      蒸發后的氣態制冷劑為低溫低壓制冷劑。此時,其溫度滿足冷凝要求,但其壓力過低,無法滿足再冷凝要求。所以我們要提高它的壓強來滿足冷凝壓力的條件。壓縮機是用來提高制冷劑壓力的裝置。
      The evaporated gaseous refrigerant is low temperature and low pressure refrigerant. At this time, its temperature meets the requirement of condensation, but its pressure is too low to meet the requirement of re condensation. So we have to increase its pressure to meet the conditions of condensation pressure. The compressor is a device used to increase the refrigerant pressure.
      壓縮過程:壓縮機的吸嘴吸入低溫低壓制冷劑,此時由于溫度高于制冷劑蒸汽壓縮機,壓縮機將制冷劑,壓縮機的熱量和溫度下降,但隨著氣體壓縮,壓縮腔氣體溫度急劇上升,在年底前壓縮氣體的溫度遠高于壓縮機的溫度,高溫氣體被送回壓縮機,加熱和暖化壓縮機。氣體在溫度結束時的壓縮受到以下因素的影響:1)壓縮比,壓縮率=排氣壓力/吸氣壓力)2)氣體的絕熱指數,氣體的絕熱指數是一個常數,由氣體的性質決定的,絕熱指數越高,越高排氣溫度(壓力),如R22絕熱指數高于一切,所以R22的排氣壓力3)吸氣溫度和冷凝壓力高。氣體制冷劑過熱時,吸力溫度較高。
      Compression process: the suction nozzle of the compressor sucks in low-temperature and low-pressure refrigerant. At this time, because the temperature is higher than that of the refrigerant steam compressor, the compressor will reduce the heat and temperature of the refrigerant and the compressor. However, as the gas is compressed, the temperature of the gas in the compression chamber rises sharply. Before the end of the year, the temperature of the compressed gas is much higher than that of the compressor, and the high-temperature gas is sent back to the compressor for heating and warming. The compression of gas at the end of temperature is affected by the following factors: 1) compression ratio, compression ratio = exhaust pressure / suction pressure) 2) adiabatic index of gas, the adiabatic index of gas is a constant, which is determined by the nature of gas. The higher the adiabatic index is, the higher the exhaust temperature (pressure) is. For example, the adiabatic index of R22 is higher than everything else, so the exhaust pressure of R22 is 3) high suction temperature and condensation pressure. When the gas refrigerant is overheated, the suction temperature is higher.
      如果制冷劑吸收的壓縮機熱量大于壓縮結束時釋放的熱量,則壓縮機溫度下降,出現結霜現象。如果制冷劑對壓縮機的吸熱量小于壓縮結束時放出的熱量,則會導致壓縮機溫度升高,使壓縮機產生高溫熱現象。
      If the heat absorbed by the refrigerant from the compressor is greater than the heat released at the end of compression, the temperature of the compressor will drop and frost will appear. If the heat absorbed by the refrigerant to the compressor is less than the heat released at the end of compression, the temperature of the compressor will rise, causing the compressor to produce high temperature heat.
      壓縮機排出的高溫、高壓制冷劑氣體,當進入冷凝器,由于溫度較高,不符合冷凝溫度條件,所以我不能很好的為液化凝結,冷凝器的傳熱在氣相制冷劑,制冷劑溫度下降,那么它將凝結成液體,電容器的體積減少,空間也相應減少。被占式冷凝器的相對減容過程也是一個相對壓降的過程,散熱和冷卻的過程決定了這個過程的速度。冷凝量還是不夠的,然而,還有一個因素決定了冷凝壓力(高壓),膨脹閥打開(按體積),因為從制冷劑壓縮機排氣口,膨脹閥的制冷劑液體放電是一種動態的平衡,如果開放通過小,膨脹閥排出量小于壓縮機的流量,可以使壓力。如果開孔太大,則會出現相反的情況,冷凝壓力與熱膨脹閥開孔有一定的正比關系。
      When the high-temperature and high-pressure refrigerant gas discharged from the compressor enters the condenser, due to the high temperature, it does not meet the condensing temperature conditions, so I can not well condense for liquefaction. The heat transfer of the condenser is in the gas-phase refrigerant, and the temperature of the refrigerant drops, so it will condense into liquid, reduce the volume of the capacitor, and reduce the space accordingly. The relative capacity reduction process of occupied condenser is also a process of relative pressure drop, and the process of heat dissipation and cooling determines the speed of this process. The amount of condensation is not enough. However, there is another factor that determines the condensation pressure (high pressure), and the expansion valve is opened (by volume). Because from the outlet of the refrigerant compressor, the discharge of the refrigerant liquid in the expansion valve is a dynamic balance. If the opening is small, the discharge amount of the expansion valve is less than the flow rate of the compressor, and the pressure can be made. If the opening is too large, the opposite situation will occur. The condensation pressure is proportional to the opening of the thermal expansion valve.
      總之,汽車空調是由高壓1)壓縮比2)氣體的絕熱指數3)吸氣溫度4)壓縮機溫度5)冷凝器的冷卻性能6)膨脹閥和其他因素的匹配性能,如果以后再遇到高壓高時,你可以找到一個解決方案從上面的因素。
      In a word, automobile air conditioning is composed of high pressure 1) compression ratio 2) adiabatic index of gas 3) suction temperature 4) compressor temperature 5) cooling performance of condenser 6) matching performance of expansion valve and other factors. If you encounter high pressure in the future, you can find a solution from the above factors.
      以上是濟南沃爾沃汽車專修公司小編為大家介紹的相關內容,想要了解更多內容,歡迎訪問網站:http://www.philiprobert.comThe above is the relevant content introduced by the small edition of Jinan Volvo car repair company. If you want to know more, please visit the website: http://www.philiprobert.com

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