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Outdoor unit of variable refrigerant flow air-conditioning system and variable refrigerant flow air-conditioning system

A multi-connection system, outdoor unit technology, applied in compressors, refrigerators, mechanical equipment, etc., can solve the problems of compressor wear and oil return bias, and achieve the effect of improving service life

Inactive Publication Date: 2016-07-13
GD MIDEA HEATING & VENTILATING EQUIP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the multi-connected system is running at full load, the return oil can be evenly distributed to a certain extent according to the amount of suction refrigerant of each compressor, but when the refrigerant at the outlet of the low-pressure tank is divided into each compressor, due to the distribution pipe (Two T-shaped tubes or two Y-shaped tubes are common) Improper processing or installation can easily cause the return oil to cause a bias flow, resulting in failure of the oil-deficient compressor due to wear

Method used

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  • Outdoor unit of variable refrigerant flow air-conditioning system and variable refrigerant flow air-conditioning system
  • Outdoor unit of variable refrigerant flow air-conditioning system and variable refrigerant flow air-conditioning system
  • Outdoor unit of variable refrigerant flow air-conditioning system and variable refrigerant flow air-conditioning system

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Experimental program
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Embodiment 1

[0055] Such as Figure 1-Figure 3 As shown, the outdoor unit 100 of the multi-connected system in this embodiment includes a main air return pipe 7, a main compressor 4, a supplementary oil return pipeline 9 and two auxiliary compressors (namely the first auxiliary compressor 1 and the second auxiliary compressor 1). Auxiliary compressor 2) and an oil separator 8.

[0056] Each compressor has an air return port 6 and an exhaust port 5 , and the air return port 6 of each compressor is connected to the main air return pipe 7 through a corresponding sub-air return pipe 61 .

[0057] The oil separator 8 includes an inlet 81 , an oil outlet 82 and a discharge port 83 , the inlet 81 is connected to the exhaust port 5 of each compressor, and a sub-oil return pipeline 62 is connected between each sub-return pipe 61 and the oil outlet 82 . Each sub-oil return pipeline 62 is connected in series with a first throttling device 621 having throttling and pressure-reducing functions to redu...

Embodiment 2

[0066] Such as Figure 4 As shown, the outdoor unit 100 of the multi-connected system in this embodiment includes a main air return pipe 7, a main compressor 4, a supplementary oil return pipeline 9 and three auxiliary compressors (namely the first auxiliary compressor 1, the second Auxiliary compressor 2 and a third auxiliary compressor 3) and an oil separator 8.

[0067] Each compressor has an air return port 6 and an exhaust port 5 , and the air return port 6 of each compressor is connected to the main air return pipe 7 through a corresponding sub-air return pipe 61 .

[0068] The oil separator 8 includes an inlet 81 , an oil outlet 82 and a discharge port 83 , the inlet 81 is connected to the exhaust port 5 of each compressor, and a sub-oil return pipeline 62 is connected between each sub-return pipe 61 and the oil outlet 82 . Each sub-oil return pipeline 62 is connected in series with a first throttling device 621 having throttling and pressure-reducing functions to redu...

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Abstract

The invention discloses an outdoor unit of a variable refrigerant flow air-conditioning system and the variable refrigerant flow air-conditioning system.The outdoor unit comprises a main gas return pipe, a plurality of compressors and an oil separator, the compressors include the main compressor and the N auxiliary compressors, each compressor is provided with a gas return opening and an exhaust opening, the gas return opening of each compressor is connected with the main gas return pipe through a branch gas return pipe, the oil separator is provided with an inlet, an oil outlet and a discharge port, the inlet is connected with the exhaust opening of each compressor, a branch oil return pipeline is connected between each branch gas return pipe and the oil outlet, each branch oil return pipeline is connected with a first throttling device with a throttling and pressure reducing function in series, and the first throttling devices corresponding to the at least N-1 auxiliary compressors are constructed to have an opening and closing function, and each first throttling device with the opening and closing function is opened when the corresponding auxiliary compressor runs.By means of the outdoor unit, the oil return amounts of all the running compressors can be uniformly distributed.

Description

technical field [0001] The invention relates to the technical field of refrigeration equipment, in particular to an outdoor unit of a multi-connection system and the multi-connection system. Background technique [0002] Compared with the traditional central air-conditioning system, the multi-connected system has the advantages of energy saving, low operating cost, space saving, advanced control, reliable operation, convenient maintenance, good unit adaptability, wide cooling and heating temperature range, and high degree of design freedom. , Easy installation and billing. Multi-connection systems, especially frequency conversion multi-connection systems, are increasingly widely used in small and medium-sized buildings and some public buildings. [0003] However, due to structural characteristics such as long pipelines and many elbows, the multi-line system has many places where oil is stored, and oil return is difficult. As the running time of the multi-line system increa...

Claims

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Application Information

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IPC IPC(8): F25B31/00F25B41/04F25B41/20F25B41/34
CPCF25B31/004F25B41/20
Inventor 王命仁
Owner GD MIDEA HEATING & VENTILATING EQUIP CO LTD
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