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Automatic oil return control method and device for improving oil return effect and air conditioning equipment

An oil return control and automatic technology, applied in mechanical equipment, lighting and heating equipment, heating and ventilation control systems, etc., can solve problems such as oil shortage, and achieve the effect of increasing service life, improving unit performance, and reducing operating power consumption.

Active Publication Date: 2020-06-12
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The embodiment of the present invention provides an automatic oil return control method, device and air-conditioning equipment to improve the oil return effect, so as to solve the oil shortage problem caused by the mode switching operation of the air-conditioning unit of the multi-refrigerant circulation shell-and-tube system in the prior art

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  • Automatic oil return control method and device for improving oil return effect and air conditioning equipment
  • Automatic oil return control method and device for improving oil return effect and air conditioning equipment
  • Automatic oil return control method and device for improving oil return effect and air conditioning equipment

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Embodiment 1

[0034] figure 1 is a flowchart of an automatic oil return control method according to an embodiment of the present invention, such as figure 1 As shown, the method includes the following steps:

[0035] Step S101, detecting the current operating mode of the air conditioner; wherein, the operating mode includes: cooling mode, heating mode, and hot water heating mode;

[0036] In step S102, after the accumulated running time of the compressor reaches the preset oil return time, based on the mode switching strategies corresponding to different operating modes, the current operating mode is switched to return the lubricating oil to the compressor.

[0037] It should be noted that in different operating modes, the refrigerant circulation loop of the air conditioner is also different. The refrigerant shell-and-tube circulation systems are different in cooling mode, heating mode, cooling heat recovery mode, and hot water heating mode (the cooling and heating circulation systems are...

Embodiment 2

[0052] The mode switching oil return scheme proposed by the present invention will be described in detail below through preferred embodiments and accompanying drawings.

[0053] The mode switching oil return scheme specifically refers to: when the user sets to the cooling mode, after accumulating the preset time of operation, it will automatically switch to the cooling heat recovery mode for a period of time, and then switch back to the cooling mode. When the user sets it to the heating mode, it will automatically switch to the hot water heating mode for a period of time after accumulating the preset running time, and then switch back to the heating mode. When the user sets it to the hot water heating mode, it will automatically switch to the cooling heat recovery mode for a period of time, and then switch back to the hot water heating mode after running for the preset time. For mode switching back to oil, switching mode operation will not affect the user's current demand for ...

Embodiment 3

[0070] corresponds to figure 1 The automatic oil return control method introduced, this embodiment provides an automatic oil return control device, such as Figure 7 The structural block diagram of the automatic oil return control device shown, the device includes:

[0071] The detection module 10 is used to detect the current operation mode of the air conditioner; wherein, the operation mode includes: cooling mode, heating mode, and hot water heating mode;

[0072] The oil return module 20 is connected to the detection module 10, and is used to perform mode conversion on the current operation mode based on the mode conversion strategies corresponding to different operation modes after the cumulative operation time of the compressor reaches the preset oil return time, so as to Lubricating oil is recycled to the compressor.

[0073] If it is a cooling mode, the corresponding mode conversion strategy is to convert the cooling mode into a cooling heat recovery mode;

[0074] I...

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Abstract

The invention discloses an automatic oil return control method and device for improving oil return effect and air conditioning equipment. The method comprises the steps: detecting a current operationmode of an air conditioner, wherein the operation mode comprises a refrigerating mode, a heating mode and a water heating mode; and after the accumulated running time of a compressor reaches the preset oil return time, performing mode conversion on the current operation mode based on mode conversion strategies corresponding to different operation modes so as to recover lubricating oil to the compressor. By means of the automatic oil return control logic, the mode of a unit is switched to return oil, refrigeration and heating requirements of users are not influenced, lubricating oil in all shell-and-tube heat exchangers is recycled to the compressor with maximum efficiency, and the problem of oil shortage caused by mode switching operation of the compressor is solved. The oil shortage operation of the compressor is effectively avoided, the operation power consumption of the compressor is reduced, the service life of the compressor is prolonged, and the performance of the unit is improved.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to an automatic oil return control method and device for improving the oil return effect, and an air conditioner. Background technique [0002] At present, the compressor oil return control of most commercial inverter air conditioners is to judge the continuous or cumulative operation of the air conditioner for a preset time, and then control the compressor to run at the preset oil return frequency, so that it will follow the refrigerant into the shell-and-tube heat exchanger cycle The lubricating oil is recovered and used to lubricate the compressor. [0003] This method is more effective for oil return control of air-conditioning units with a single refrigerant circulation shell-and-tube system, but for air-conditioning units with multiple refrigerant circulation shell-and-tube systems (such as refrigeration and refrigeration heat recovery, heating and heating water, heat...

Claims

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Application Information

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IPC IPC(8): F24F11/61F24F11/64F24F11/65F24F11/67F25B31/00
CPCF25B31/004F24F11/61F24F11/64F24F11/65F24F11/67
Inventor 俞煜辉刘帅孙亚丽陈军平周葆林
Owner GREE ELECTRIC APPLIANCES INC
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