Triaxial pressure high-efficient air cooled heat pump unit applicable to large temperature difference
An air-cooled heat pump, large temperature difference technology, applied in refrigerators, compressors, refrigeration components, etc., can solve the problems of high exhaust temperature, large compressor compression ratio, cooling capacity/heating capacity and energy efficiency ratio. Widening application fields, improving reliability, and ingenious effects of unit design optimization
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Embodiment 1
[0023] Such as figure 1 As shown, the present invention provides a three-pressure high-efficiency air-cooled heat pump unit suitable for large temperature differences. Heat exchanger 4-1, outdoor fan 4-2, first check valve 5-1, second check valve 5-2, third check valve 5-3, fourth check valve 5-4, Fifth one-way valve 5-5, sixth one-way valve 5-6, recooler 6, dry filter 7, observation mirror 8, first expansion valve 9, medium pressure gas-liquid separator 10, second expansion valve 11 , Indoor side heat exchanger 12, low-pressure gas-liquid separator 13, evaporation pressure regulator 14, auxiliary circuit compressor 15, auxiliary circuit oil separator 16 and connecting pipelines. The exhaust port of the main road compressor 1 is connected to the inlet of the fifth one-way valve 5-5 through the main road oil separator 2, and the outlet of the fifth one-way valve 5-5 is connected to the sixth one-way valve 5. The outlet of -6 is connected, and the gas outlet after the two are ...
Embodiment 2
[0026]The main circuit compressor 1 of the present invention is a fixed-frequency scroll compressor, and the auxiliary circuit compressor 15 is a fixed-frequency rolling rotor compressor; the indoor heat exchanger 12 is an air-cooled heat exchanger; The outdoor side heat exchanger 4-1 is a finned tube heat exchanger; the outdoor side fan 4-2 is a frequency conversion fan; the first expansion valve 9 is a manual expansion valve, and the second expansion valve 11 It is a blocking expansion valve; the evaporating pressure regulator 14 is a proportional regulator controlled by the pre-valve pressure (ie evaporating pressure); the subcooler 6 is a plate heat exchanger. Other structures are the same as in Embodiment 1.
Embodiment 3
[0028] The main circuit compressor 1 described in the present invention is a fixed-frequency rolling rotor compressor, and the auxiliary circuit compressor 15 is a fixed-frequency scroll compressor; the indoor side heat exchanger 12 is an air-cooled heat exchanger; The outdoor side heat exchanger 4-1 is a laminated heat exchanger; the outdoor side fan 4-2 is a frequency conversion fan; the first expansion valve 9 is a float type expansion valve, and the second expansion valve 11 It is a blocking expansion valve; the evaporating pressure regulator 14 is a proportional-integral regulator controlled by the pre-valve pressure (ie evaporating pressure); the subcooler 6 is a casing heat exchanger. Other structures are the same as in Embodiment 1.
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