fred perry singapore Thermal expansion valve in th

Thermal expansion valve in the fully automatic calorimeter method to test stand

O. difference 5%, the absolute value of the suction pressure is very small, especially in the measurement of maximum pressure condition, the measured value and the average value and the regulations were only 2kPa and 1kPa between the volatility of Fana stepper motor has adjustable calorimetry The front throttle approach,[link widoczny dla zalogowanych], we should adjust the suction pressure to the standard range of accuracy required, after several tests, results were not satisfactory. Imported from abroad calorimeter Testing Platform, the suction pressure regulator pneumatic control method most used, but the moment is difficult to find suitable domestic air conditioning components products. To this end, consider the use of thermal expansion valve as a regulating element even through the test, and achieved good results,[link widoczny dla zalogowanych], are presented for the development of automatic adjustment calorimeter Testing Platform for reference. Second, l is a schematic structure of thermal expansion valves to control air conditioning compressor suction pressure of the structure diagram. Eleven of the working conditions of no data input in a computer program, based on the pressure sensor to the suction pressure electrical signal, intermittently stopping the intake and exhaust valve bamboo 2 and 3, adjust the thermal expansion valve bellows 【gas tank ],[. And the adjustment is the spring force Pr2, / J fraud: use, so that the valve opening degree increase or decrease until the compressor suction force 』Iq R i set the suction force twenty to _ remain the same until the source of the pressure into electromagnetic lavish In the 5-6bar about the empty mound Jimi air supply pressure to undergo a decompression valve Yan constant pressure before the pressure regulator valve 21 PK1 knock the intake and exhaust valve 4. L castrated prince Yu thermal expansion thermal expansion valve pneumatic control schematic structure of the atmosphere of a stretch. /',/,~ Debate gas pressure 1 / 1 leisure temperature, /,, Figure 2 suction and discharge pressure and suction temperature resistance and the test l silver carp Shai curves of the two former times three. The results automatically Pi heat barrier test stand cooling the test method Pifanebu 4kw, measured as the R12 refrigerant refrigeration compressors, suction pressure control applications run Qigong deep section of thermal expansion, condensation pressure control with 1% precision pneumatic ensure section of the valve to cool the condenser section unloading gal water and dried,, 』0.25 clamor measured the number of force sensor, temperature measurement accuracy is 0l degree of platinum resistance,[link widoczny dla zalogowanych], try to ride through a variety of sets r: trial of measurement of living conditions Figure 2 is a test bed test cricket 3.5kW cooling & child machine, the computer screen and print out a few curves that help cooling association table Fixed Yan suction machine collapse force, discharge pressure and suction temperature and test 34 when the relationship between dragonfly from which to watch j * 【: test bench to run into the conditions required to set the spring time. Test bench to run the set condition, the computer recorded every l5 minutes brine inspiratory force, discharge pressure and suction core level values are listed in Table 1 Bu. Table 1 30Ul evaporation temperature of a banana hair {=} i force P0】 OO. 4 | kPa absolute) degree of condensation Yun 50 ℃ (Ling,[link widoczny dla zalogowanych], condensate pressure Pk: 12193kPa absolute) Test I: inspiratory overflow with t-degree temperature of 0 ℃ over-ling units tk = 45 ℃】 34. r are kPa suction pressure 0480290670q06lJf Table Mengchia Island) Li states exhaust pressure kPal2l453l2l963l221356j2l39jl8OI (gauge) measured suction temperature of the boat ℃ 022025O38O36O30】 IV Conclusion The results show that the measured suction pressure l11 table settings and four times with the measured ' volatility between the mean in [kP or less, in full compliance with standards. About volatility 6kP discharge pressure, suction temperature volatility 0l6c, accuracy requirements than the standard even higher, and adjust the speed test bed,[link widoczny dla zalogowanych], was transferred to the parameters l-Hour goblet full access to the stable state (2) so I think that the whole Automatic Testing Platform calorimeter used pneumatic suction pressure thermal expansion valve is an ideal device. This is because: 1, stepper motor driven throttle wide and the suction pressure regulation, the regulator can be done though the angle is small, there is still adjustable, suction pressure to meet the standard requirements of precision volatility, the difficulty the introduction of H the larger the ... domestic units with automatic calorimeter Testing Platform, Li stepper motor suction pressure regulation adopted, the volatility of 5kP left. Use air rinse section of the thermal expansion of the inspiratory pressure can be adjusted steplessly, the accuracy is very easy to ensure the group 2, compared to the stepper motor driven throttle valve device, air conditioning thermal expansion Yan devices are cheap, simple structure, processing, installation and easy to adjust, and reliable, after six months, has never been out running fault reference [11 GB5773-86 National Cup semi-displacement refrigerant compressor for test methods f £ 【2】! SO9】 7 a】 974 (E) Testingofrefrigerationcompressor

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