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Control method and system for oil return, air conditioner and computer readable storage medium

An oil return control and computer technology, which is applied to refrigerators, compressors, refrigeration components, etc., can solve the problem that the oil return function is not fully utilized, and achieve the effect of increasing the oil return and reducing the oil discharge.

Active Publication Date: 2020-06-12
NINGBO AUX ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides an oil return control method, system, air conditioner and computer-readable storage medium to solve the technical problem that the oil return function is not fully utilized during the existing low-temperature start-up operation process

Method used

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  • Control method and system for oil return, air conditioner and computer readable storage medium
  • Control method and system for oil return, air conditioner and computer readable storage medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as figure 1 Shown, a kind of oil return control method comprises steps:

[0037] S1, when the outdoor ambient temperature package detects the temperature <T for 30 seconds in a row, T is -15°C to 0°C, and some indoor units are started, the outdoor unit receives the start command of the indoor unit, and the solenoid valve SV2 starts immediately;

[0038] S2, after power-on self-inspection, the compressor increases to Fn1 at the frequency increase rate V1, maintains the frequency at Fn1 for t1 seconds, then decreases the frequency at the increase rate of V2 and maintains the frequency at Fn2 for t2 seconds, then increases to Fn3 at the increase rate of V3 , and then start the platform automatically according to the normal operation;

[0039] S3, after the internal unit is not turned on, the electronic expansion valve adjusts the opening to the number of Q1 steps after t3 seconds after receiving the start signal of the compressor;

[0040] S4, after the start-up of ...

Embodiment 2

[0049] Such as figure 2 As shown, an oil return control system includes:

[0050] A compressor lifting frequency control module, the compressor lifting frequency control module can control the compressor to operate according to the set lifting frequency according to the compressor lifting frequency control command sent by the main controller of the air conditioner;

[0051] A solenoid valve control module, the solenoid valve control module controls the operation of the solenoid valve SV2;

[0052] The electronic expansion valve control module of the internal machine is not powered on, and the electronic expansion valve control module of the internal machine is not powered on to control the operation of the electronic expansion valve of the internal machine not powered on;

[0053] The main controller of the air conditioner, the main controller of the air conditioner controls the operation of the control module of the lifting frequency of the compressor, the control module of...

Embodiment 3

[0055] An air conditioner, the air conditioner includes the above-mentioned oil return control system, and the air conditioner also includes a computer-readable storage medium and a processor storing a computer program, and when the computer program is read and run by the processor , realizing the above oil return control method.

[0056] A computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is read and executed by a processor, the above oil return control method is realized.

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Abstract

The invention discloses a control method and system for oil return, an air conditioner and a computer readable storage medium. The control method comprises the steps that: S1, when the temperature < Tis detected by an outdoor loop temperature packet for 30 seconds continuously and part of internal units starts, wherein T is -15 DEG C to 0 DEG C, an external unit receives an internal unit startinginstruction, and a solenoid valve SV2 starts immediately; S2, after startup self-test, a compressor rises to Fn1 with a frequency lift rate V1, maintains t1 seconds with the frequency Fn1, then decreases the frequency with a frequency lift rate V2 to maintain t2 seconds with the frequency Fn2, and then increases to Fn3 with a frequency lift rate V3, and then a platform is normally started to automatically operate; S3, after receiving a start signal of the compressor, the opening of a non-started electronic expansion valve of the internal units is adjusted to Q1 after t3 seconds; and S4, afterthe air conditioner is started, the compressor, the solenoid valve SV2 and the non-started electronic expansion valve of the internal units are adjusted normally. According to the control method andsystem for oil return, the air conditioner and the computer readable storage medium, rapid oil return in a low temperature starting stage can be realized.

Description

technical field [0001] The invention relates to the technical field of air-conditioning equipment, in particular to an oil return control method, system, air conditioner and computer-readable storage medium. Background technique [0002] In the low temperature environment of multi-connected air conditioners, the viscosity of the refrigeration oil is low, and it is easily dissolved in the refrigerant and discharged together. Will fail due to wear. When it is partially opened, especially when the smallest internal unit is opened alone, it is even worse, and the oil exists in the entire system along with the refrigerant. [0003] At present, regardless of the temperature conditions and compressor frequency in the start-up phase, it usually follows a fixed ramp-up rate, frequency, and time. The pursuit of rapid heating will cause the oil to be discharged quickly, resulting in oil shortage; the electronic expansion valve is opened when the internal unit is not turned on, The va...

Claims

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Application Information

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IPC IPC(8): F25B31/00F25B49/02
CPCF25B31/004F25B49/02F25B2500/16F25B2600/02F25B2600/25F25B2600/2513
Inventor 吴海波黄春刘合心朱礼晋
Owner NINGBO AUX ELECTRIC
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