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Frequency adjusting method and device of frozen water pump and air conditioning system

A chilled water pump and frequency adjustment technology, which is applied in the field of frequency adjustment of air-conditioning systems and chilled water pumps, can solve problems such as the loopholes in the constant pressure difference control strategy and constant temperature difference control strategy, and achieve the effect of improving operating efficiency and solving high energy consumption

Pending Publication Date: 2018-11-09
GREE ELECTRIC APPLIANCES INC OF ZHUHAI
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide a frequency adjustment method, device, and air conditioning system for chilled water pumps to solve the problem of loopholes in both the constant pressure difference control strategy and the constant temperature difference control strategy in the prior art

Method used

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  • Frequency adjusting method and device of frozen water pump and air conditioning system
  • Frequency adjusting method and device of frozen water pump and air conditioning system
  • Frequency adjusting method and device of frozen water pump and air conditioning system

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Embodiment 1

[0031] figure 1 is a flowchart of a method for adjusting the frequency of a chilled water pump according to an embodiment of the present invention, such as figure 1 As shown, the method includes the following steps:

[0032] Step S101, adjusting the preset pressure difference value according to the temperature difference between the supply and return water of the freeze-drying pipe and the preset temperature difference value;

[0033] Step S102, adjusting the target frequency of the chilled water pump according to the pressure difference between the supply and return water of the freeze-dry pipe and the adjusted preset pressure difference.

[0034] This embodiment organically combines the traditional constant pressure difference control strategy with the traditional constant temperature difference control strategy, and proposes a temperature difference-pressure difference cascade control strategy, which effectively solves the traditional constant pressure difference control s...

Embodiment 2

[0057] corresponds to figure 1 In the cold water pump frequency adjustment method introduced, this embodiment provides a cold water pump frequency adjustment device, such as Figure 4 The structural block diagram of the cold water pump frequency adjustment device shown, the device includes:

[0058] The pressure difference adjustment module 10 is used to adjust the preset pressure difference value according to the temperature difference between the supply and return water of the freeze-dry pipe and the preset temperature difference value;

[0059] The frequency adjustment module 20 is connected to the pressure difference adjustment module 10, and is used for adjusting the target frequency of the chilled water pump according to the pressure difference between the supply and return water of the freeze-dry pipe and the adjusted preset pressure difference.

[0060] This embodiment organically combines the traditional constant pressure difference control strategy with the traditio...

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Abstract

The invention discloses a frequency adjusting method and device of a frozen water pump and an air conditioning system. The method comprises the following steps: a preset pressure difference value is adjusted according to a water supply and return temperature difference of a frozen dry pipe and a preset temperature difference value; and the target frequency of the frozen water pump is adjusted according to the water supply and return temperature difference of the frozen dry pipe and the adjusted preset pressure difference value. Traditional fixed-pressure-difference control policies are organically combined with traditional fixed-temperature-difference control policies to provide temperature difference-pressure difference cascade stage control policies, so that the problems of high energy consumption under low load in the traditional fixed-pressure-difference control policies and weak control reliability of the traditional fixed-temperature-difference control policies are effectively solved, and the operation efficiency of a whole central air conditioning system is improved.

Description

technical field [0001] The present invention relates to the technical field of air conditioning, in particular to a method and device for adjusting the frequency of a chilled water pump and an air conditioning system. Background technique [0002] In the primary pump variable flow central air conditioning system, the constant pressure difference control strategy is usually adopted, that is, the deviation between the supply and return water pressure difference of the freeze dry pipe and its set value is used to control the target frequency of the cold water pump. However, the above-mentioned technical means have the problems of high operating frequency and high energy consumption of the refrigeration pump when the load is small. A constant temperature difference control strategy can also be used, but this technical means has the problem of poor reliability. [0003] Aiming at the problem that both the constant pressure difference control strategy and the constant temperature...

Claims

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Application Information

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IPC IPC(8): F24F5/00F24F11/64F24F11/83
CPCF24F5/0003F24F11/64F24F11/83
Inventor 刘国林韩宏权王升何玉雪姜春苗
Owner GREE ELECTRIC APPLIANCES INC OF ZHUHAI
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