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Flow control method and device for air conditioning system

An air-conditioning system and flow control technology, applied in heating and ventilation control systems, heating and ventilation safety systems, heating methods, etc., can solve problems such as increased energy consumption of chilled water pumps, and achieve the effects of reducing energy consumption and improving operating efficiency

Inactive Publication Date: 2015-10-07
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a flow control method and device for an air conditioning system to at least solve the technical problem of increased energy consumption of chilled water pumps due to the constant control of the pressure difference of the chilled water main pipe

Method used

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  • Flow control method and device for air conditioning system
  • Flow control method and device for air conditioning system
  • Flow control method and device for air conditioning system

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Embodiment 1

[0021] Since the existing primary pump variable flow air conditioning system usually controls the work of the chilled water pump by maintaining a constant pressure difference in the chilled water main pipe (between the water supply main pipe and the return water main pipe), but the air conditioning system will produce The phenomenon of small temperature difference and large flow rate under certain conditions indicates that the energy consumption of the chilled water pump increases under the condition of low load rate.

[0022] Therefore, different from the existing primary pump variable flow air conditioning system, that is, figure 1 It is a principle diagram of a primary pump variable flow air conditioning system provided by the related art. The embodiment of the present invention provides a cascade control of the flow control method of the air conditioning system based on the relationship between the opening of the chilled water valve and the chilled water pump, that is, fi...

Embodiment 2

[0056] The embodiment of the invention also provides a flow control device for an air conditioning system. The device can realize its function through the flow control method of the air conditioning system. It should be noted that the flow control device of the air conditioning system in the embodiment of the present invention can be used to implement the flow control method of the air conditioning system provided in the embodiment of the present invention, and the flow control method of the air conditioning system in the embodiment of the present invention can also be implemented by the present invention The flow control device of the air conditioning system provided by the embodiment is implemented.

[0057] Figure 4 is a schematic structural diagram of a flow control device for an air conditioning system according to an embodiment of the present invention. Such as Figure 4 As shown, the flow control device of the air conditioning system includes: a detection module 42,...

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Abstract

The invention discloses a flow control method and device for an air conditioning system. The method comprises the steps that open degree values of each tail-end freezing water valve in the air conditioning system are inspected; the open degree values of each freezing water valve are compared to obtain the maximum open degree value Vm of the freezing water valve; a set value of a current freezing water total pipe pressure difference is adjusted according to the comparison result of the maximum open degree value Vm and a preset open degree range, wherein the preset open degree range comprises a first open degree threshold value Vms1 and a second open degree threshold value Vms2 , set in advance, of the freezing water valve; the working frequency of a freezing water pump is controlled according to a set value of the adjusted current freezing water total pipe pressure difference. According to the flow control method and device for the air conditioning system, the technical problem that the energy consumption of the freezing water pump rises due to the constant control of the freezing water total pipe pressure difference is solved.

Description

technical field [0001] The invention relates to the application field of electrical automation, in particular to a flow control method and device for an air conditioning system. Background technique [0002] In the existing pump variable flow air conditioning system, in order to control the working frequency of the chilled water pump and adjust the flow rate of the chilled water pump, the work of the chilled water pump is usually controlled by maintaining a constant pressure difference in the chilled water main pipe (between the water supply main pipe and the return water main pipe) . [0003] Specifically, in the above-mentioned constant pressure control, since the pressure difference of the chilled water main pipe remains constant, the operating frequency of the chilled water pump is still adjusted according to the pressure difference regardless of the load rate of the air conditioning system. However, if the operating frequency of the chilled water pump is adjusted accor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/00
CPCF24F11/83F24F11/30F24F11/46F24F11/62F24F11/64F24F11/85
Inventor 刘国林钟丹艳刘羽松
Owner GREE ELECTRIC APPLIANCES INC