Refrigeration system and oil supply control method, device and controller thereof

A refrigeration system and oil supply technology, which is used in refrigeration and liquefaction, refrigerators, refrigeration components, etc., can solve the problems of inability to control the amount of oil injection, and the pressure difference between compressor suction and exhaust, so as to improve the initial oil supply temperature, increase the The effect of the oil supply pressure and the requirement to reduce the pressure difference between suction and discharge

CN112665222BActive Publication Date: 2022-08-02GREE ELECTRIC APPLIANCES INC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2022-08-02

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Abstract

The present application relates to a refrigeration system and its oil supply control method, device and controller. Wherein, on the basis of the oil supply pipeline including the oil supply solenoid valve in the original refrigeration system, an oil pump is arranged in parallel with the oil supply solenoid valve, and the inlet of the oil pump is connected to the oil supply pipeline on the outlet side of the oil separator. It is connected to each other, and an electric regulating valve is arranged in series between the oil supply solenoid valve and the oil supply port of the compressor, so that the initial oil supply temperature and the oil supply pressure can be increased based on the operation of the oil pump, and the oil supply can be adjusted based on the electric regulating valve. The oil flow in the pipeline is controlled. That is to say, by setting in this way, when supplying oil to the oil-injected screw compressor, the requirement for the pressure difference between the suction and discharge of the compressor can be reduced, that is, the operating range of the compressor under the low suction and discharge pressure difference can be widened, and The actual fuel injection quantity can be controlled.
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Description

technical field

[0001] The present application relates to the technical field of refrigeration systems, and in particular, to a refrigeration system and an oil supply control method, device and controller thereof. Background technique

[0002] For refrigeration systems including oil-injected screw compressors, during use, oil injection (oil supply) needs to be performed on the compressor suction, exhaust, body nozzles, loading and unloading oil circuits, etc. to meet the requirements of the balance piston and bearing. Lubrication, lubricating noise reduction cooling in the rotor cavity, pushing of loading and unloading spool valves.

[0003] In the current scheme, fuel injection can only be achieved when the pressure difference between the suction and discharge of the compressor satisfies the conditions. Moreover, it is designed as an unadjustable or limited adjustment of the fuel injection orifice only according to the fuel injection volume (fuel supply volume) that meets ...

Examples

Embodiment

[0079] refer to figure 2 , figure 2 This is a schematic structural diagram of a refrigeration system provided in an embodiment of the present application. like figure 2 shown, the refrigeration system is figure 1 On the basis of the system shown, the oil supply pipeline is also provided with: an oil pump 6 connected in parallel with the oil supply solenoid valve 5, and an electric regulating valve 7 connected in series between the oil supply solenoid valve 5 and the oil supply port of the compressor 1; The inlet of the oil pump 6 is connected to the oil supply pipeline on the outlet side of the oil separator 2; the oil pump 6 is used to increase the initial oil supply temperature and increase the oil supply pressure; the electric regulating valve 7 is used to control the oil flow of the oil supply pipeline. control.

[0080] The oil supply temperature refers to the temperature of the refrigeration oil in the oil supply pipeline before entering the oil supply port of the...