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A compressor protection method for a multi-connected system

A compressor protection, multi-connection system technology, applied in refrigerators, refrigeration safety arrangements, refrigeration components, etc., can solve the problems of poor control effect, reduced user comfort, long connection pipes, etc., to achieve convenient control and prolong service life , to ensure the effect of suction superheat

Active Publication Date: 2018-02-06
NANJING TICA AIR CONDITIONING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem with this method is that because the connecting pipes of most systems are relatively long, this adjustment method has a certain hysteresis and the control effect is poor.
At the same time, adjusting the opening of the indoor unit will lead to a decrease in user comfort.

Method used

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  • A compressor protection method for a multi-connected system

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Embodiment Construction

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] like figure 1 shown.

[0020] A multi-connection system includes an outdoor unit and two indoor units connected in parallel. Wherein, each indoor unit includes an electronic expansion valve 6 and a heat exchanger 7, and the electronic expansion valve 6 and the heat exchanger 7 are connected in series. The outdoor unit includes a compressor 1 , an oil separator 2 , a four-way valve 3 , a condenser 4 , a main electronic expansion valve 5 , a gas-liquid separator 10 and a solenoid valve 11 . The refrigerant outlet of the compressor 1 is connected to the refrigerant inlet of the oil separator 2 , and the refrigerant outlet of the oil separator 2 is connected to the first port of the four-way valve 3 . The second port of the four-way valve 3 is connected to the indoor unit after passing through the condenser 4 and the main electronic expansion valve ...

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Abstract

The invention relates to a method for protecting a compressor of a multi-split air conditioning system. The multi-split air conditioning system comprises an outdoor unit and a plurality of indoor units. The outdoor unit comprises a compressor, an oil separator, a four-way valve and a gas-liquid separator, all of which are connected in sequence. Each indoor unit comprises a heat exchanger and an electronic expansion valve connected with the heat exchanger in series. An electromagnetic valve, a pressure sensor and a temperature sensor are arranged between the compressor and the oil separator. When detected temperature and pressure reach certain values, the electromagnetic valve is controlled to be opened, high-pressure gas of the exhaust side of the compressor is bypasses to the suction side of the compressor, and liquid refrigerating fluid on the suction side is heated into overheating gas; and the suction overheating degree of the compressor is guaranteed, and safe and reliable running of the compressor is guaranteed.

Description

technical field [0001] The invention relates to a control method of an air-conditioning system, in particular to a compressor protection method suitable for a multi-connection system, in particular to a compressor protection method for a multi-connection system. Background technique [0002] At present, in the refrigeration operation of the multi-line system, it often occurs that the compressor is burned out due to liquid backflow due to excessive refrigerant charging or abnormal system control. For the above problems, the common control method is: when it is found that the unit has liquid backflow, the opening of the indoor unit valve is closed to reduce the amount of liquid carried in the system. However, the problem of this method is: because the connecting pipes of most systems are long, this adjustment method has a certain hysteresis, and the control effect is poor. At the same time, adjusting the opening of the indoor unit will reduce the comfort of the user. SUMMAR...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B49/02
CPCF25B49/022F25B2600/02F25B2600/05
Inventor 易博杨兵杨亚华
Owner NANJING TICA AIR CONDITIONING CO LTD
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