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Control method and device for heat pump system electronic expansion valve

A technology of electronic expansion valve and heat pump system, applied in the field of regulating valve, can solve the problems of large fluctuation range of system energy efficiency ratio, inability to guarantee the best energy efficiency of the unit, and inability to meet the precision control of electronic expansion valve, etc.

Inactive Publication Date: 2018-11-16
GUANGDONG PHNIX ECO ENERGY SOLUTION
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] However, since the collection of superheat data takes time, the adjustment of the heat pump system also has a corresponding hysteresis. The traditional method of real-time detection of superheat and immediately adjusting the opening of the electronic expansion valve cannot guarantee the operation of the unit. Best energy efficiency; at the same time, for heat pump systems with super-large operating conditions, only one fixed parameter value is set to adjust the opening of the electronic expansion valve, which cannot satisfy the precision control of the electronic expansion valve and the fluctuation of the energy efficiency ratio of the system very large range

Method used

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  • Control method and device for heat pump system electronic expansion valve
  • Control method and device for heat pump system electronic expansion valve
  • Control method and device for heat pump system electronic expansion valve

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Embodiment Construction

[0037] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0038] Such as figure 1 As shown, a method for controlling an electronic expansion valve of a heat pump system according to a preferred embodiment of the present invention includes steps S1 to S5:

[0039] S1: Set target superheat, fixed parameter value X, adjustment period t;

[0040] S2: Data collection of superheat degree, at least two superheat degree data are collected in the current adjustment cycle, and the buffer time for system response is reserved in the first part of each adjustment cycle, the first superheat degree data Acquisition starts after the buffer time;

[0041] Specifically: a buffer time is set in the front section of each adjustment cycle, which i...

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Abstract

The invention relates to the technical field of adjusting valves, and discloses a control method and device for a heat pump system electronic expansion valve. The control method comprises the steps that the target overheat degree, the fixed parameter value X and the adjusting periods t are set; overheat degree data collection is conducted, at least two overheat degree data are collected in the current adjusting period, and buffering time for a system to respond is reserved in the front section of each adjusting period; the overheat degree deviation delta T is calculated and is equal to the difference of the current overheat degree and the target overheat degree; the aperture of the electronic expansion valve is adjusted according to the delta T and the fixed parameter value X; and the second step is repeatedly executed, and circulation is conducted. According to the control method and device, through setting of the adjusting periods, the buffering time for the system to adjust and respond is arranged in the front section of each adjusting period, and the adjusting lagging performance of the system is sufficiently considered; and t serves as the adjusting periods, the aperture of the electronic expansion valve is adjusted by calculating the overheat degree deviation and the set fixed parameter value X, and the adjusting precision is high.

Description

technical field [0001] The invention relates to the technical field of regulating valves, in particular to a control method and device for an electronic expansion valve of a heat pump system. Background technique [0002] The traditional heat pump system mainly calculates the opening degree of the electronic expansion valve according to a fixed parameter value by monitoring the superheat data, and then adjusts the heat pump system to ensure the energy efficiency ratio of the unit. [0003] However, since the collection of superheat data takes time, the adjustment of the heat pump system also has a corresponding hysteresis. The traditional method of real-time detection of superheat and immediately adjusting the opening of the electronic expansion valve cannot guarantee the operation of the unit. Best energy efficiency; at the same time, for heat pump systems with super-large operating conditions, only one fixed parameter value is set to adjust the opening of the electronic ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B49/00F25B41/06F25B41/34
CPCF25B49/00F25B41/31Y02B30/70
Inventor 黄世哲刘远辉高翔雷朋飞
Owner GUANGDONG PHNIX ECO ENERGY SOLUTION
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