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Central air conditioner and controlling method thereof

A technology of a central air conditioner and a control method, which is applied to heating and ventilation control systems, refrigerators, heating methods, etc., and can solve problems such as lowering product reliability, abnormal operation of compressor 11, and lack of oil, so as to improve reliability , Prevent the damage of the compressor and the effect of the abnormal operation of the compressor

Inactive Publication Date: 2006-03-29
LG ELECTRONICS (TIANJIN) APPLIANCES CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the compressor 11 of this prior art central air conditioner may cause the amount of lubricating oil recovered by the oil return pipe 41 to be less because of the pressure difference between the compressor 11 outlet and the inlet in the initial stage of operation. There may be oil shortage inside the compressor 11
In addition, if the diameter of the capillary 41a set on the oil return pipe 41 is large, the refrigerant and lubricating oil may flow back at the same time, which will reduce the performance of the air conditioner, so special attention should be paid to the design
If the design is improper, when the compressor 11 is just started, there will not be enough pressure difference between the inlet and outlet of the compressor 11, which is not conducive to the recovery of lubricating oil.
If the lubricating oil cannot be fully recovered, the compressor 11 may be damaged or the compressor 11 may not work properly, which in turn will reduce the reliability of the product

Method used

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  • Central air conditioner and controlling method thereof
  • Central air conditioner and controlling method thereof
  • Central air conditioner and controlling method thereof

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Embodiment Construction

[0028] like Figure 1 to Figure 3 As shown, the central air conditioner provided by the present invention is composed of an outdoor unit 50 and a plurality of indoor units 100, 110, 120. The outdoor unit 50 and the multiple indoor units 100, 110, 120 are connected by a common refrigerant pipe 130, and the multiple indoor units 100, 110, 120 share one outdoor unit 50, and perform heating or cooling operations respectively. The outdoor unit 50 includes a compressor 54 , an oil separator 58 , a four-way valve 72 , an outdoor heat exchanger 52 , an oil return pipe 56 and an oil circuit switching device 60 . Lubricating oil is installed inside the compressor 54, which can discharge the lubricating oil and the cooling medium at the same time after compressing the cooling medium. The oil separator 58 is connected to the discharge pipe 54 a of the compressor 54 . The four-way valve 72 is connected to the oil separator 58 and is used to switch the flow direction of the refrigerant. ...

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Abstract

The present invention relates to a kind of central air conditioner and its control method. It includes the following several portions: compressor, oil distributor, four-way valve, outdoor heat exchanger, indoor heat exchanger, expansion value, oil-returning pipe and oil circuit switchover device. Said invention also provides the concrete steps of its control method.

Description

technical field [0001] The present invention relates to a central air conditioner and its control method, in particular to a central air conditioner capable of smoothly recovering lubricating oil from the compressor of the air conditioner at the initial stage of operation, thereby preventing oil shortage inside the compressor and its control method. Control Method. Background technique [0002] Image 6 It is a schematic diagram of the internal structure of a central air conditioner in the prior art. like Image 6 As shown, this prior art central air conditioner includes a compressor 11, a condensing device (an outdoor heat exchanger 13 during cooling, and an indoor heat exchanger 21, 22, 23 during heating), expansion valves 14, 15, 16. Evaporation device (indoor heat exchangers 21, 22, 23 for cooling, outdoor heat exchanger 13 for heating), outdoor fan 17, outdoor motor 18, indoor supply fans 27, 28, 29, indoor motor 31, 32, 33 and the control section. The compressor 11 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B43/02F24F11/00
Inventor 朴永浩
Owner LG ELECTRONICS (TIANJIN) APPLIANCES CO LTD
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