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Method for protecting compressor of multi-split air conditioning system

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

Active Publication Date: 2016-02-17
NANJING TICA AIR CONDITIONING CO LTD
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  • Abstract
  • Description
  • Claims
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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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  • Method for protecting compressor of multi-split air conditioning system

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Embodiment Construction

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

[0019] Such as 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 . Wherein, 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 ex...

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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, specifically a compressor protection method for a multi-connection system. Background technique [0002] At present, when the multi-connected system is in refrigeration operation, it often happens that the compressor is burned due to liquid return due to excessive refrigerant charge or abnormal system control. For the above problems, the common control method is: when the unit is found to have liquid back, close the opening of the indoor unit valve to reduce the amount of liquid in the system. 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 degree of the indoor unit will reduce user comfort. Contents of the in...

Claims

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Application Information

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Patent Type & Authority Applications(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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