Air conditioner circulation system and circulation method thereof

A technology of circulation system and air conditioner, which is applied in the direction of compressor, refrigerator, lighting and heating equipment with reversible cycle, can solve the problems of compressor shock, reduce air conditioner energy efficiency, breakdown, etc. The effect of thermal properties

Active Publication Date: 2021-04-13
QINGDAO HISENSE HITACHI AIR CONDITIONING SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current technology, in order to ensure the reliable operation of the compressor system, the most required amount of oil will be injected into the system. When the excess lubricating oil enters the heat exchanger, an oil film will be formed on the heat transfer wall surface, reducing the heat transfer effect. , so that the cooling and heating effect of the air conditioner is relatively poor, and the energy efficiency of the air conditioner is reduced
[0005] (2) When the o

Method used

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  • Air conditioner circulation system and circulation method thereof
  • Air conditioner circulation system and circulation method thereof
  • Air conditioner circulation system and circulation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] High-frequency operation: When the number of indoor units of the air conditioner is increased, the frequency of the compressor 102 in the outdoor unit of the air conditioner will increase. At this time, the oil demand of the air conditioning circulation system is less than A, the solenoid valve 207 is closed, the second oil return pipe 204 returns oil through the second capillary tube 108, and the oil storage part 201 in the oil separator 200 is filled with lubricating oil, reducing The amount of lubricating oil entering the heat exchanger, to avoid excessive lubricating oil increasing the thermal resistance of the heat exchanger and affecting the heat exchange efficiency.

Embodiment 2

[0085] Low-frequency operation: When the number of air-conditioning indoor units turned on decreases, the frequency of the compressor 102 in the air-conditioning outdoor unit will decrease. There is a lot of oil. At this time, the oil demand of the air conditioning circulation system is greater than A. Open the solenoid valve 207, and the lubricating oil passes through the first oil return pipe 203 and the second oil return pipe 204 at the same time, and passes through the first capillary tube 107 and the second capillary tube 108 The returned oil then enters the air-conditioning circulation system to lubricate the air-conditioning circulation system and ensure the stability of the compressor 102 .

Embodiment 3

[0087] Intermittent oil return: When the air-conditioning circulation system operates at a low frequency for T3, the system will perform oil return control, and the frequency of the compressor 102 will increase to increase the circulation speed of the lubricating oil in the air-conditioning circulation system. Some oil does not need to participate in the air-conditioning circulation system. At this time, the oil demand of the air-conditioning circulation system is less than A, so that the solenoid valve 207 is in a closed state, and the excess oil is stored in the oil storage unit 201. When the air-conditioning circulation system After switching to a lower frequency, the oil demand of the system will rise again. Therefore, during the low-frequency operation of the air-conditioning circulation system, the oil demand is dynamic. At this time, the solenoid valve 207 needs to be opened and closed intermittently to realize intermittent It can improve the average performance of the u...

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Abstract

The invention relates to the technical field of air conditioners, and discloses an air conditioner circulation system and a circulation method thereof. The air conditioner circulation system comprises a compressor, a heat exchanger and an oil separator, an oil storage part and an oil return part are arranged in the oil separator, a first oil return pipe is arranged to communicate with the oil storage part, and a second oil return pipe is arranged to communicate with the oil return part. An oil overflow hole is formed in the upper oil storage limit of the oil storage part, redundant oil flows into the oil return part, when the oil demand is large, an electromagnetic valve of the first oil return pipe is opened, the oil passes through the two pipelines simultaneously, when the oil demand is small, the electromagnetic valve of the first oil return pipe is closed, so that one part of oil is stored in the oil storage part, and the other part of oil flows into the oil return part; and the problems that the compressor needs a large amount of lubricating oil to maintain stable operation, but after the redundant lubricating oil enters the heat exchanger, the heat exchange effect of the heat exchanger is affected are solved.

Description

technical field [0001] The invention relates to the field of air conditioners, in particular to an air conditioning circulation system and a circulation method thereof. Background technique [0002] An important factor for the normal and reliable operation of the air-conditioning circulation system is whether the system has good lubricity, which is crucial to the lubrication of components and the operation of the system. However, for the currently used refrigerants, a large part is still organic substances, which makes the refrigerants contain Lubricating oil operation, when the lubricating oil enters the heat exchanger together with the refrigerant gas, a layer of oil film will be formed on the heat transfer wall surface, which will increase the thermal resistance, thereby reducing the heat transfer effect of the heat exchanger and reducing the cooling effect, so An oil separator device must be installed between the compressor and the heat exchanger to separate the lubricat...

Claims

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Application Information

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IPC IPC(8): F25B13/00F25B31/00F25B43/02
CPCF25B13/00F25B31/004F25B43/02F25B2313/02741F25B2500/28Y02B30/70
Inventor 杨春雪王晖刘东来郭斌侯志辉宁明辉王振
Owner QINGDAO HISENSE HITACHI AIR CONDITIONING SYST
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