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Multiple connected air conditioning system and control method thereof

A multi-connected air-conditioning and air-conditioning system technology, which is applied in the direction of temperature control, electrical program control, space heating and ventilation, etc. by using electric methods, can solve the problems of not saving energy, unfavorable system stability, and large system fluctuations. Small volatility, enhanced energy saving effect, good cooling or heating effect

Inactive Publication Date: 2010-11-10
欧威尔空调科技(中国)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is to overcome the relatively large fluctuation of the system existing in the multi-connection capacity calculation method in the prior art, which is not conducive to the stability of the system. In view of the shortcomings of the best cooling / heating effect, a control method and system for a multi-connected air-conditioning system are provided to achieve small fluctuations and stability of the air-conditioning system, and to operate at the best energy efficiency ratio, with good energy-saving effects, and to achieve the best cooling / heating effect. heating effect

Method used

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  • Multiple connected air conditioning system and control method thereof
  • Multiple connected air conditioning system and control method thereof

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Embodiment 1

[0040] In refrigeration mode, when the multi-line is outputting under pressure control, the pressure control method provided by the embodiment of the present invention includes steps:

[0041] A1) According to the operating parameters of the air conditioning system, the operating parameters of the air conditioning system include outdoor ambient temperature (Outside Air Temperature, OAT), indoor ambient temperature (Room Air Temperature, RAT), indoor coil inlet temperature (ICIT), indoor coil Tube intermediate temperature (ICMT), indoor coil outlet temperature (ICOT) and indoor air speed (IFAN), as well as compressor operating frequency, outdoor fan speed and opening of indoor and outdoor electronic expansion valves, use fuzzy control algorithm to calculate a target evaporation temperature ;

[0042]A2) Converting the pressure measured by the low pressure sensor into a saturated refrigerant temperature, using the refrigerant temperature as an actual evaporation temperature, and...

Embodiment 2

[0047] In the heating mode, when the multi-line is outputting under pressure control, the pressure control method provided by the embodiment of the present invention includes:

[0048] B1) According to the operating parameters of the air conditioning system, the operating parameters of the air conditioning system include outdoor ambient temperature (Outside Air Temperature, OAT), indoor ambient temperature (Room Air Temperature, RAT), indoor coil inlet temperature (ICIT), indoor coil Tube intermediate temperature (ICMT), indoor coil outlet temperature (ICOT) and indoor air speed (IFAN), as well as compressor operating frequency, outdoor fan speed and indoor and outdoor electronic expansion valve opening, use fuzzy control algorithm to calculate a target condensation temperature;

[0049] B2) converting the pressure measured by the high pressure sensor into a saturated refrigerant temperature, using the refrigerant temperature as an actual condensation temperature, and calculat...

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Abstract

The invention discloses a control method of a multiple connected air conditioning system. The control method comprises the following steps of: calculating a target temperature by using a fuzzy control algorithm according to operating parameters of an air conditioning system; converting an actual pressure measured by a pressure sensor into a saturated refrigerant temperature as an actual temperature and calculating a difference value of the actual temperature and the target temperature; and calculating and adjusting capacity output of a compressor, wind speed of an outdoor fan and openings of indoor and outdoor electronic expansion valves by using a proportion integration differentiation algorithm according to the difference value of the actual temperature and the target temperature, a change rate of the actual pressure and a change rate of the actual temperature and the target temperature so that the actual temperature and the target temperature are consistent. The invention also discloses the multiple connected air conditioning system. The air conditioning system has little wave property, stability, favorable refrigeration and heating effects and favorable energy saving effect.

Description

technical field [0001] The present invention relates to the technical field of air conditioning, and more specifically, to a control method and system for a multi-connected air conditioning system. Background technique [0002] The multi-connected air conditioner (heat pump) unit is referred to as the multi-connected unit. It was born in Japan in the 1980s. In my country, it is a new type of air-conditioning system with the characteristics of a centralized air-conditioning system that has only been developed in recent years. It integrates technology and has the characteristics of energy saving, comfort, and flexible control. Through the combination and arrangement of units with different capacities, it can meet the requirements of buildings of different scales. [0003] The traditional air conditioning control idea regards the indoor and outdoor units as a whole to design the control scheme, which is a typical centralized control system. This kind of control idea is very sui...

Claims

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Application Information

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IPC IPC(8): F24F11/00G05B19/04G05D23/19
Inventor 吕东建苏建周永平黄勇
Owner 欧威尔空调科技(中国)有限公司
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