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Compressor oil return control method, oil return device and air conditioner

A technology of oil return control and compressor, which is applied in the direction of refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems that the oil return efficiency cannot be guaranteed, and the normal oil return of the inverter air conditioner can not be guaranteed, so as to reduce the number of gates , Improve working performance and reduce bypass loss

Active Publication Date: 2017-09-12
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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  • Compressor oil return control method, oil return device and air conditioner
  • Compressor oil return control method, oil return device and air conditioner
  • Compressor oil return control method, oil return device and air conditioner

Examples

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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 a compressor oil return control method, an oil return device and an air conditioner, including a compressor, an oil separator, an oil return pipeline and a controller; the inlet of the oil separator is connected to the exhaust port of the compressor, Receive and separate the oil-air mixture discharged from the compressor; the oil return pipeline is connected between the oil outlet of the oil separator and the compressor, and returns the oil separated by the oil separator to the compressor; The oil pipeline is provided with multiple throttling pipelines, and the multiple throttle pipelines are connected in parallel; the controller is used to adjust the operating frequency of the compressor, and according to the operating frequency of the compressor, the Multiple throttling pipelines are used for gating control. The present invention designs a plurality of throttling pipelines in parallel in the oil return pipeline of the compressor, and performs gating control on each throttle pipeline according to the different operating frequencies of the compressor, thereby ensuring that the compressor can operate under various operating conditions. The oil can be returned normally, ensuring the amount of oil returned.

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 Patents(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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