Rôl prif gydrannau'r sychwr oergell
Cywasgwyr rheweiddio yw calon y system reweiddio, ac mae'r mwyafrif o gywasgwyr heddiw yn defnyddio cywasgwyr dwyochrog hermetig. Raising the refrigerant from low to high pressure and circulating the refrigerant continuously, the system continuously discharges internal heat to an environment above the system temperature.
2. Cyddwysydd
The function of the condenser is to cool the high-pressure, superheated refrigerant vapor discharged by the refrigerant compressor into a liquid refrigerant, and its heat is taken away by the cooling water. Mae hyn yn caniatáu i'r broses rheweiddio barhau yn barhaus.
3. Anweddydd
4. Falf Ehangu Thermostatig (Capilari)
Y falf ehangu thermostatig (capilari) yw mecanwaith taflu'r system rheweiddio. Yn y sychwr rheweiddio, gwireddir cyflenwad yr oergell anweddydd a'i reoleiddiwr trwy'r mecanwaith gwefreiddio. Mae'r mecanwaith gwefreiddio yn caniatáu rheweiddio i fynd i mewn i'r anweddydd o'r hylif tymheredd uchel a phwysedd uchel.
5. Cyfnewidydd gwres
The vast majority of refrigeration dryers have a heat exchanger, which is a heat exchanger that exchanges heat between air and air, generally a tubular heat exchanger (also known as a shell and tube heat exchanger). The main function of the heat exchanger in the refrigeration dryer is to “recover” the cooling capacity carried by the compressed air after being cooled by the evaporator, and use this part of the cooling capacity to cool the compressed air at a higher temperature carrying a large amount of water vapor (that is, the saturated compressed air discharged from the air compressor, cooled by the rear cooler of the air compressor, and then separated by air and water is generally above 40 °C), thereby reducing the heating load of the refrigeration and drying system and achieving the purpose of saving energy. On the other hand, the temperature of low-temperature compressed air in the heat exchanger is recovered, so that the outer wall of the pipeline transporting compressed air does not cause “condensation” phenomenon due to the temperature below the ambient temperature. In addition, after the temperature of the compressed air rises, the relative humidity of the compressed air after drying is reduced (generally less than 20%), which is beneficial to prevent the rust of the metal. Some users (eg with air separation plants) need compressed air with low moisture content and low temperature, so the refrigeration dryer is no longer equipped with a heat exchanger. Gan nad yw'r cyfnewidydd gwres wedi'i osod, ni ellir ailgylchu'r aer oer, a bydd llwyth gwres yr anweddydd yn cynyddu llawer. In this case, not only does the power of the refrigeration compressor need to be increased to compensate for energy, but also the other components of the entire refrigeration system (evaporator, condenser and throttling components) need to be increased accordingly. From the perspective of energy recovery, we always hope that the higher the exhaust temperature of the refrigeration dryer, the better (high exhaust temperature, indicating more energy recovery), and it is best that there is no temperature difference between the inlet and outlet. But in fact, it is not possible to achieve this, when the air inlet temperature is below 45 °C, it is not uncommon for the inlet and outlet temperatures of the refrigeration dryer to differ by more than 15 °C.
Prosesu aer cywasgedig
Cynnal a Chadw ac Arolygu: Cynnal tymheredd pwynt gwlith y sychwr rheweiddio uwchlaw sero.
Er mwyn lleihau tymheredd yr aer cywasgedig, rhaid i dymheredd anweddiad yr oergell hefyd fod yn isel iawn. When the refrigeration dryer cools the compressed air, there is a layer of film-like condensate on the surface of the fin of the evaporator liner, if the surface temperature of the fin is below zero due to the decrease in the evaporation temperature, the surface condensate may freeze, at this time:
A. Due to the attachment of a layer of ice with a much smaller thermal conductivity on the surface of the inner bladder fin of the evaporator, the heat exchange efficiency is greatly reduced, the compressed air can not be fully cooled, and because of the insufficient heat absorption, the refrigerant evaporation temperature may be further reduced, and the result of such a cycle will inevitably bring many adverse consequences to the system reweiddio (megis “cywasgiad hylif”);
B. Due to the small spacing between the fins in the evaporator, once the fins freeze, the circulation area of compressed air will be reduced, and even the air path will be blocked in severe cases, that is, “ice blockage”; In summary, the compression dew point temperature of the refrigeration dryer should be above 0 °C, in order to prevent the dew point temperature from being too low, the refrigeration dryer is provided with energy bypass protection (achieved by bypass valve or fluorine solenoid valve). When the dew point temperature is lower than 0 °C, the bypass valve (or fluorine solenoid valve) automatically opens (the opening increases), and the uncondensed high-temperature and high-pressure refrigerant steam is directly injected into the inlet of the evaporator (or the gas-liquid separation tank at the compressor inlet), so that the dew point temperature is raised to above 0 ° C.
Harholwch
2. Gauge pwysau anweddu 0.4MPA-0.5MPA;
3. GAUGE PWYSAU PWYSAU UCHEL 1.2MPA-1.6MPA
4. Arsylwch yn aml y systemau draenio a charthffosiaeth
Mater Gweithredol
1 Gwiriwch cyn rhoi hwb
1.1 Mae holl falfiau'r system rhwydwaith pibellau mewn cyflwr wrth gefn arferol;
1.2 Agorir y falf dŵr oeri, dylai'r pwysedd dŵr fod rhwng 0.15-0.4MPA, ac mae tymheredd y dŵr yn is na 31ċ;
1.3 Mae gan y mesurydd gwasgedd uchel oergell a'r mesurydd gwasgedd isel oergell ar y dangosfwrdd arwyddion ac yn y bôn maent yn gyfartal;
1.4 Gwiriwch y foltedd cyflenwad pŵer, na fydd yn fwy na 10% o'r gwerth sydd â sgôr.
2.1 Pwyswch y botwm Start, mae'r cysylltydd AC yn cael ei oedi am 3 munud ac yna dechreuwch, ac mae'r cywasgydd oergell yn dechrau rhedeg;
2.2 Observe the dashboard, the refrigerant high-pressure meter should slowly rise to about 1.4Mpa, and the refrigerant low-pressure meter should slowly drop to about 0.4Mpa; Ar yr adeg hon, mae'r peiriant wedi mynd i mewn i'r wladwriaeth waith arferol.
2.5 Gwiriwch a yw draeniad y draen awtomatig yn normal;
2.6 Gwiriwch amodau gwaith y sychwr yn rheolaidd, cofnodwch y fewnfa aer a'r pwysau allfa, gwasgedd uchel ac isel glo oer, ac ati.
3 Gweithdrefn Diffodd;
3.3 Pwyswch y botwm stopio.
4 Rhagofalon
4.1 Osgoi rhedeg am amser hir heb lwyth.
4.2 Peidiwch â chychwyn y cywasgydd oergell yn barhaus, ac ni fydd nifer y cychwyniadau a'r stopiau yr awr yn fwy na 6 gwaith.
4.3 Er mwyn sicrhau ansawdd y cyflenwad nwy, gwnewch yn siŵr eich bod yn cadw at drefn cychwyn a stopio.
4.3.1 Dechreuwch: Gadewch i'r sychwr redeg am 3-5 munud cyn agor y cywasgydd aer neu'r falf fewnfa.
4.3.2 Diffodd: Diffoddwch y cywasgydd aer neu'r falf allfa yn gyntaf ac yna diffoddwch y sychwr.
4.5 Ni fydd y pwysedd aer yn fwy na 0.95MPA.
4.6 Nid yw tymheredd aer y fewnfa yn fwy na 45 gradd.
4.8 Peidiwch â throi ymlaen pan fydd y tymheredd amgylchynol yn is na 2ċ.
4.9 Ni fydd y gosodiad ras gyfnewid amser yn y cabinet rheoli trydan yn llai na 3 munud.
4.10 Gweithrediad Cyffredinol Cyn belled â'ch bod yn rheoli'r botymau “cychwyn” a “stopio”
4.11 The air-cooled refrigeration dryer cooling fan is controlled by the pressure switch, and it is normal for the fan not to turn when the refrigeration dryer works at a low ambient temperature. Wrth i'r gwasgedd uchel oergell gynyddu, mae'r gefnogwr yn cychwyn yn awtomatig.
Amser Post: Awst-26-2023