Reciprocating piston compressor for trans-critical CO2 refrigeration cycle

A refrigeration cycle, reciprocating piston technology, applied in mechanical equipment, machinery/engine, liquid variable capacity machinery, etc., can solve the problems of small flow, high pressure, high pressure difference, etc., to improve reliability and improve suction volume efficiency , the effect of reducing the clearance volume

Inactive Publication Date: 2008-11-19
RES INST OF XIAN JIAOTONG UNIV & SUZHOU
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a kind of suitable for transcritical CO 2 Semi-hermetic reciprocating piston compressor for refrigeration cycle to solve the problems of high pressure, high pressure difference and small flow required by the cycle

Method used

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  • Reciprocating piston compressor for trans-critical CO2 refrigeration cycle

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Embodiment Construction

[0031] Referring to accompanying drawing, a kind of transcritical CO involved in the present invention 2 The compressor used in the refrigeration cycle is a semi-hermetic reciprocating piston type. The compressor housing is composed of cylinder block 1, motor housing 2 and crankcase 3. Cylinder block 1 and piston 4A and the top of piston 4B and valve plate assembly 50 constitute two sealed working cylinders 40A, 40B respectively, and the two working cylinders are vertical and parallel to each other, and their design parameters are the same; piston pin 5 connects two pistons 4A , 4B and connecting rods 6A, 6B are connected to form a connecting rod assembly, the crankshaft 7 is a 180 degree crankshaft, two connecting rods (6A and 6B) are connected to the crankshaft 7, and bearing bushes 8 (8A and 8B) are installed between them. Satisfy friction requirements. The crank shaft 7 is supported by the first and second sliding bearings 9 and 10, and is radially constrained on the mot...

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Abstract

The invention discloses a reciprocating piston compressor for CO2 transcritical refrigeration cycle, which is single-grade double-cylinder vertical self-closed structure. The motor shaft and the crankshaft are designed in the coaxial line with the alternating angle of 180 degrees. By connecting the side shell of motor with the side shell of crankshaft box, air leakage from oil seal generated by high pressure in opening compressor is avoided and the linkage at the flange connection position in dividing structure is decreased because the cylinder body is integrated with the crankshaft box and motor shell together. Intensity and rigidity of shell is increased and the lack of compressor intensity generated by high pressure in CO2 transcritical refrigeration cycle is solved. The compressor realizes enough circulation area for suction and exhaustion in the compact space by the design of charging and discharging valve plate of compressor and sucking and exhausting channels embedded in cylinder cover plate and the loss of flow resistance and airflow pulsation of suction and exhaustion are decreased. By the design of convex platform at the top of piston, clearance volume of compressor can be decreased effectively so as to improve the cubage efficiency of compressor.

Description

technical field [0001] The present invention relates to a compressor, in particular to a compressor for transcritical CO 2 The reciprocating piston compressor of the refrigeration cycle, and the design of the suction and discharge valve plate and the suction and discharge channel structure of the reciprocating piston compressor are given to solve the problem of CO 2 Due to the narrow installation space at the suction and discharge of the compressor cylinder, the compressor can have a sufficiently large suction and discharge flow area and a buffer chamber, thereby reducing the air flow pulsation of the compressor and improving the volumetric efficiency. Background technique [0002] Since the late 1980s, due to the depletion of the ozone layer and the greenhouse effect of CFCs and HCFCs, the air-conditioning industry using them as refrigerants is facing the challenge of developing alternatives, given that new compound alternatives also imply unpredictability hazards, people ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B27/12F04B39/10F04B39/00
Inventor 邢子文马元何志龙彭学院
Owner RES INST OF XIAN JIAOTONG UNIV & SUZHOU
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