Heat recovering multi-split air conditioner and oil balancing control method thereof

A control method and heat recovery technology, applied in the multi-connected field, can solve the problems of increasing the cost of air conditioning, increasing the oil equalization pipeline, and the risk of system liquid seal, so as to improve installation efficiency, reduce installation operations, and eliminate system reliability problems.

Active Publication Date: 2017-01-11
合肥海尔空调电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the oil equalizing pipeline is usually connected between the compressors. However, when adding the oil equalizing pipeline, it not only increases the cost of the air conditioner but also brings some troubles to the installation. In addition, the added oil equalizing pipeline also has Hazard of creating liquid seals in the system

Method used

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  • Heat recovering multi-split air conditioner and oil balancing control method thereof
  • Heat recovering multi-split air conditioner and oil balancing control method thereof
  • Heat recovering multi-split air conditioner and oil balancing control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] refer to figure 1 In this embodiment, a heat recovery multi-connection system is a three-pipeline heat recovery multi-connection system, including an indoor unit and two outdoor unit modules, that is, an outdoor unit module A10 and an outdoor unit module B20; the outdoor unit module A10 includes a compressor 11 , gas-liquid separator 12, four-way valve 13, low-pressure gas pipe 14 and controller, outdoor unit module B20 includes compressor 21, gas-liquid separator 22, four-way valve 23, low-pressure gas pipe 24 and controller; for each outdoor unit Module, taking the outdoor unit module A10 as an example, the exhaust port 111 of the compressor 11 is connected to the first valve port of the four-way valve 13, the air return port 112 is connected to the gas outlet 121 of the gas-liquid separator 12, and the low-pressure air pipe 14 The first end is connected to the second valve port of the four-way valve 13, and the connection relationship of each component of the outdoor...

Embodiment 2

[0038] refer to image 3 , and the difference from Embodiment 1 is that in this embodiment, there are three outdoor unit modules of the three-pipeline heat recovery multi-line unit, that is, in addition to the outdoor unit module A10 and the outdoor unit module B20, the outdoor unit module C60 is also included, and the same , the outdoor unit module C60 includes a compressor 61, a gas-liquid separator 62, a four-way valve 63, a low-pressure air pipe 64, a controller and a high-pressure air pipe 67, and the exhaust port 611 of the compressor 61 is connected to the first port of the four-way valve 63. Valve port, the air return port 612 is connected to the gas outlet 621 of the gas-liquid separator 62, and the first end of the low-pressure air pipe 64 is connected to the second valve port of the four-way valve 63; Pipe 30 and low-pressure air pipe 64 are provided with a pressure sensor 69; the suction port 622 of the gas-liquid separator 62 is connected to the low-pressure air p...

Embodiment 3

[0053] The heat recovery multi-split system in this embodiment is a cooling-only heat recovery multi-split system, which is different from the three-pipeline heat recovery multi-split system described in Embodiments 1 to 3 in that it does not have high-pressure air pipes and simultaneous cooling and heating devices. refer to Figure 5 , when the cooling-only heat recovery multi-split unit includes an indoor unit and two outdoor unit modules, that is, the outdoor unit module A10 and the outdoor unit module B20, the specific structure is the same as that in Embodiment 1, that is, the outdoor unit module A10 includes a compressor 11, a gas Liquid separator 12, four-way valve 13, low-pressure air pipe 14 and controller, outdoor unit module B20 includes compressor 21, gas-liquid separator 22, four-way valve 23, low-pressure air pipe 24 and controller; for each outdoor unit module, Taking the outdoor unit module A10 as an example, the exhaust port 111 of the compressor 11 is connect...

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Abstract

The invention provides a heat recovering multi-split air conditioner and an oil balancing control method thereof. The heat recovering multi-split air conditioner comprises an indoor unit and at least two outdoor unit modules, wherein each of the outdoor unit modules comprises a compressor, a gas-liquid separator, a four-way valve, a low pressure air duct and a controller; an exhaust port of each compressor is connected to a first valve port of the four-way valve, a return air inlet is connected to an air outlet of each gas-liquid separator, and the first end of each low pressure air duct is connected to a second valve port of the corresponding four-way valve; the second ends of all the low pressure air ducts are collected to a low pressure air duct indoor unit and outdoor unit connecting pipe, and a pressure sensor is arranged on each of the low pressure air ducts, an air suction port of each gas-liquid separator is connected to the corresponding low pressure air duct, an oil drain out of each of the compressors is connected to the corresponding low pressure air duct through an oil drain capillary tube, and an electromagnetic valve is arranged on each oil drain capillary tube. According to the heat recovering multi-split air conditioner and the oil balancing control method thereof provided by the invention, an oil balancing pipeline can be removed, so that the cost is lowered; the problem of system reliability caused by a liquid seal of the oil balancing pipeline is avoided, so that a multi-split system is conveniently mounted, the mounting operation is reduced, and the mounting efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of multi-compressors, and in particular relates to the structural improvement of an oil equalizing device for multi-compressor parallel units. Background technique [0002] With the development of the domestic economy, air conditioners have made great contributions to improving the living conditions of users, especially in large-scale commercial and office spaces. Now more and more users are pursuing energy saving and environmental protection, such as using condensed waste heat to make domestic hot water, etc. In addition, there are also high requirements for the flexibility of the cooling and heating modes of air conditioners. Today, when energy saving and comfort have become the main theme of the times, the three-pipe heat recovery multi-split unit is more and more recognized by users, and it will gradually become the development trend of the multi-split unit in the future. [0003] For most three-pipelin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B41/04F25B49/02F25B41/20
Inventor 李君飞何建奇毛守博
Owner 合肥海尔空调电子有限公司
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