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A frequency control method and system

A frequency control, target frequency technology, applied in heating and ventilation control systems, heating and ventilation safety systems, control inputs involving air characteristics, etc., to achieve the effect of reasonable adjustment, improved stability and reliability

Active Publication Date: 2017-02-22
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the purpose of the present invention is to provide a frequency control method and system to solve the above-mentioned problems existing in the existing control methods, so that the unit can exert its optimal energy efficiency in real time, and improve the stability and reliability of the unit operation

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  • A frequency control method and system

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Embodiment 1

[0047] Embodiment 1 of the present invention discloses a frequency control method, which is used for real-time control of the frequency of compressors and fans in the air-conditioning unit according to the water inlet temperature of the air-conditioning unit.

[0048] Based on previous experience, the applicant conducted a series of experiments in advance to study the matching relationship between the inlet water temperature of the unit and the frequency of the compressor and fan. Its optimal energy efficiency and the corresponding compressor and fan frequency values ​​when the unit performance is the highest, on this basis, the functional relationship between the compressor frequency and the inlet water temperature, and the functional relationship between the fan frequency and the inlet water temperature are obtained, so that In the follow-up, the unit frequency can be adjusted in real time and reasonably according to the functional relationship between the unit frequency and ...

Embodiment 2

[0085] In the second embodiment, refer to figure 2 , the method shown also includes:

[0086] S105: If the judgment result is yes, the frequency of the unit compressor and the fan is not adjusted and controlled.

[0087] Specifically, when the calculated compressor frequency and fan frequency are the same as the compressor frequency and fan frequency currently used by the unit, there is no need to adjust the unit frequency, and the unit can maintain the original frequency.

Embodiment 3

[0089] Embodiment 3 discloses a frequency control system, and the system corresponds to the frequency control methods disclosed in Embodiment 1 and Embodiment 2.

[0090] First, refer to image 3 , corresponding to the first embodiment, the system includes an acquisition module 100 , a calculation module 200 , a judgment module 300 and a control module 400 .

[0091] The obtaining module 100 is used for obtaining the inlet water temperature of the unit in real time.

[0092] The calculation module 200 is used to respectively base on the first functional relationship of the preset compressor frequency changing with the change of the inlet water temperature within the predetermined range, and the second functional relationship of the fan frequency changing with the change of the inlet water temperature within the predetermined range , using the real-time inlet water temperature to calculate the target frequency of the compressor and the target frequency of the fan.

[0093] Th...

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Abstract

The invention discloses a frequency control method and system. The method comprises the following steps: acquiring the water inlet temperature of a unit in real time, and calculating the compressor target frequency and the fan target frequency of the unit based on a preset function relation among the compressor frequency, the fan frequency and the water inlet temperature respectively; subsequently performing corresponding adjustment on the compressor frequency and the fan frequency according to the calculated target frequency values. Through preset research and setting of the function relation between the frequency of the unit and the water inlet temperature, reasonable matching of the frequency adjustment of the unit and the change of the water inlet temperature is realized, the unit can always correspond to an appropriate frequency value at different water inlet temperatures, the problem of great frequency difference in case of cross-regional change of the water inlet temperature and the problem that the frequency does not change along with the change of the water inlet temperature in case of non-cross-regional change in the conventional sectional control way are solved, reasonable adjustment of the frequency of the unit is realized, optimal energy efficiency of the unit can be brought into full play in real time, and the running stability and reliability of the unit are enhanced.

Description

technical field [0001] The invention belongs to the technical field of frequency control and adjustment of air conditioning units, and in particular relates to a frequency control method and system. Background technique [0002] In the air conditioning unit, the frequency of the compressor and fan is generally controlled according to the water temperature of the unit, and the water temperature of the unit corresponds to a fixed frequency of the compressor and a fixed frequency of the fan in a temperature range. [0003] At present, the inlet water temperature is generally divided into three intervals. In each temperature interval, the compressor and fan maintain a corresponding fixed frequency operation. When the inlet water temperature changes across intervals, the frequency of the compressor and fan is adjusted to another The value corresponding to the temperature range. Under this control mode, the adjustment of the unit frequency cannot reasonably match the change of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F11/00
CPCF24F11/30F24F11/62F24F11/64F24F11/77F24F2110/00F24F2140/20Y02B30/70
Inventor 郑潇涵张勇邓伟彬杨文军
Owner GREE ELECTRIC APPLIANCES INC
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