Oil-returning control method and oil-returning device for compressor as well as air conditioner

A technology of oil return control and compressor, which is applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc. It can solve the problems that the inverter air conditioner cannot ensure the normal oil return and the oil return efficiency cannot be guaranteed, so as to reduce the number of strobes , Improve work performance and improve reliability

Active Publication Date: 2016-02-03
青岛海信网络能源股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the compressor oil return design used in the air conditioning system can lead the lubricating oil discharged from the compressor back to the compressor to a certain extent to ensure that the compressor can run continuously for a long time, but when the load changes greatly, the return The oil efficiency cannot be guaranteed, so it cannot be guaranteed that the inverter air conditioner can return oil normally under various working conditions

Method used

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  • Oil-returning control method and oil-returning device for compressor as well as air conditioner
  • Oil-returning control method and oil-returning device for compressor as well as air conditioner
  • Oil-returning control method and oil-returning device for compressor as well as air conditioner

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Experimental program
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Effect test

Embodiment 1

[0040] see figure 1 As shown, in the air conditioning system, under the action of the compressor M, the refrigerant is compressed from a low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure gaseous refrigerant, and is delivered to the refrigerant circulation pipeline through the exhaust port of the compressor M. When the air conditioning system works in cooling mode, the high-temperature and high-pressure gaseous refrigerant discharged through the compressor M first flows to the outdoor heat exchanger N2 through the four-way valve DS. In cooling mode, the outdoor heat exchanger N2 acts as a condenser to condense the gaseous refrigerant into liquid refrigerant, which is sent to the indoor heat exchanger N1 through the filter B1, electronic expansion valve DZ, and filter B2. The indoor heat exchanger N1 acts as an evaporator in the cooling mode, absorbs indoor heat, vaporizes the liquid refrigerant to form a gaseous refrigerant, and returns to...

Embodiment 2

[0079] see image 3 As shown, the structural design of the compressor oil return device of this embodiment is basically the same as that of the first embodiment, the only difference being the structural design of the throttling pipeline. In this embodiment, the electronic expansion valves DZ1 and DZ2 are selected as throttling elements for the structural design of the throttling pipeline. Since the electronic expansion valve has both throttling and switching functions, when changing the gating status of each throttling pipeline, it is only necessary to control the opening or closing of the electronic expansion valve in the corresponding throttling pipeline.

[0080] based on image 3 The compressor oil return device shown can be controlled by the compressor oil return control method described in Embodiment 1, and this embodiment will not be further described here.

[0081] Although image 3 Only two throttling pipelines designed by using two electronic expansion valves DZ2 ...

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Abstract

The invention discloses an oil-returning control method and an oil-returning device for a compressor as well as an air conditioner. The air conditioner comprises the compressor, an oil separator, an oil-returning pipeline and a controller, wherein an inlet of the oil separator is connected with an exhaust port of the compressor and receives gas-oil mixtures exhausted by the compressor for separation; the oil-returning pipeline is connected between an oil outlet of the oil separator and the compressor and returns oil separated by the oil separator to the compressor; a plurality of throttling pipelines are arranged in the oil-returning pipeline and in parallel connection; and the controller is used for regulating the working frequencies of the compressor and carrying on gate control on the throttling pipelines according to the working frequencies of the compressor. According to the oil-returning control method and the oil-returning device for the compressor as well as the air conditioner, a plurality of throttling pipelines are arranged in parallel in the oil-returning pipeline of the compressor, and gate control on each oil-returning pipeline is carried on according to different working frequencies of the compressor, so that the compressor can be guaranteed to return oil normally in various working conditions, and the oil-returning amount is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of air conditioning systems, and in particular relates to a control method for recovering and recycling oil discharged from a compressor in an air conditioner during operation and a design based on the oil return control method. Compressor oil return device and air conditioner. Background technique [0002] The compressor is the power core of the refrigeration system of the air conditioner. It plays the role of compressing and driving the refrigerant (refrigerant) in the circulation circuit of the refrigerant of the air conditioner. It compresses the sucked low-temperature and low-pressure refrigerant to improve the refrigerant Temperature and pressure, and then make the refrigerant move, and achieve the purpose of cooling or heating through heat conversion. [0003] The current frequency conversion air conditioning system needs to adjust the operating frequency of the compressor according to the change of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B43/00F25B41/06F25B41/34F25B41/37
Inventor 李达君
Owner 青岛海信网络能源股份有限公司
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