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Preheating control method for multi-split air conditioner compressor and multi-split device

A technology for compressor preheating and multi-line air conditioners, which is applied to the control of multi-line air conditioner compressor preheating and multi-line devices to achieve the effects of ensuring reliability, improving accuracy and improving reliability.

Active Publication Date: 2019-07-09
NINGBO AUX ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, the present invention aims to propose a method for controlling preheating of multi-connected air conditioner compressors, so as to solve the current problem that when the multi-connected air conditioner is turned on, the refrigerant evaporates and the lubricating oil is brought into the refrigerant circulation system

Method used

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  • Preheating control method for multi-split air conditioner compressor and multi-split device
  • Preheating control method for multi-split air conditioner compressor and multi-split device
  • Preheating control method for multi-split air conditioner compressor and multi-split device

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Effect test

Embodiment 1

[0048] At low temperature, when the multi-split air conditioner is not started, the lubricating oil and refrigerant in the system are stored in the oil pool of the compressor; since both the refrigerant and lubricating oil are liquid at low temperature, the refrigerant in the oil pool is mixed with the lubricating oil .

[0049] When the multi-split air conditioner is started, the compressor runs, the temperature of the compressor oil pool rises, and the liquid refrigerant gradually turns into a gaseous state and circulates in the system; because the liquid refrigerant and lubricating oil are mixed and stored in the compressor oil at low temperatures Therefore, when the compressor starts, the liquid refrigerant turns into a gaseous state and evaporates, and at the same time, a large amount of liquid lubricating oil enters the system together with the gaseous refrigerant, so that the lubricating oil in the compressor is insufficient, resulting in compressor failure. damage.

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Embodiment 2

[0116] In order to solve the problem that when the multi-split air conditioner is started, the compressor is running, and the refrigerant evaporates to drive a large amount of liquid lubricating oil into the system together with the gaseous refrigerant, so that the lubricating oil in the compressor is insufficient and the compressor is damaged. An example provides a multi-line device, see Figure 4 As shown, the multi-line device includes a compressor 1 and a compressor preheating pipeline 2; wherein both ends of the compressor preheating pipeline 2 are respectively connected to the exhaust side 3 of the compressor and the suction side 4 of the compressor; The compressor preheating pipeline 2 is provided with a solenoid valve 5; the multi-connection device also includes a detection module and a control module; the compressor 1, the compressor preheating pipeline 2, and the detection module are all connected to the control module by communication; the detection module includes ...

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Abstract

The invention provides a preheating control method for a multi-split air conditioner compressor and a multi-split device, and relates to the technical field of air conditioners. The preheating controlmethod for the multi-split air conditioner compressor comprises the steps that a starting-up command of a multi-split air conditioner is obtained; whether the preheating starting-up condition of thecompressor is met or not is judged according to the environment temperature and the initial operation parameter of the compressor; if yes, a preheating pipeline of the compressor is started; whether the preheating exit condition of the compressor is met or not is judged according to the real-time operation parameter of the compressor; and if yes, the preheating pipeline of the compressor is closed. According to the preheating control method for the multi-split air conditioner compressor, the exhaust side and the air suction side of the compressor are connected through the preheating pipeline,so that high-temperature refrigerants exhausted by the compressor directly enter the compressor to be subjected to secondary compressor to achieve the preheating purpose of the compressor, separationof the refrigerants and lubrication oil in an oil pool of the compressor is promoted accordingly, and the situation that the refrigerants take the lubrication oil away when evaporating and the compressor is damaged is avoided.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to a method for controlling preheating of multi-connected air conditioner compressors and a multi-connected device. Background technique [0002] The multi-connected air conditioner includes multiple indoor units, the pipeline is long and has many branches, so the amount of refrigerant in the multi-connected air conditioner system is relatively large; when the temperature is low, when the multi-connected air conditioner is turned on, the compressor starts, The refrigerant evaporates quickly, and it is easy to bring lubricating oil from the compressor oil pool of the multi-split air conditioner into the refrigerant circulation system, causing damage to the compressor. Contents of the invention [0003] In view of this, the present invention aims to propose a control method for preheating compressors of a multi-connected air conditioner, so as to solve the current problem t...

Claims

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Application Information

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IPC IPC(8): F24F11/64F24F11/89F24F110/10
CPCF24F11/64F24F11/89F24F2110/10
Inventor 侯丽峰秦宪赵攀汪云强闫博
Owner NINGBO AUX ELECTRIC
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