Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Double-threshold return difference control method for refrigeration electromagnetic valve

A refrigeration solenoid valve and control method technology, which is applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve problems such as changes in compressor working conditions and frequent actions of solenoid valves, and achieve the effect of reasonable method design

Inactive Publication Date: 2021-07-13
WUXI GUANYA REFRIGERATION TECH
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the existing technology, PID is generally used for regulation and control. Due to closed-loop feedback, there will be disturbances, especially when the set temperature is close to the switching threshold of the refrigeration solenoid valve, the temperature value will fluctuate around the set temperature during temperature control. , resulting in frequent action of the solenoid valve, resulting in changes in the working conditions of the compressor, which become disturbances in the closed-loop control system

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Double-threshold return difference control method for refrigeration electromagnetic valve
  • Double-threshold return difference control method for refrigeration electromagnetic valve
  • Double-threshold return difference control method for refrigeration electromagnetic valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] The present invention will be described in further detail below in conjunction with examples and specific implementation methods.

[0020] The dual-threshold hysteresis control method for a refrigeration solenoid valve comprises the following steps:

[0021] 1) Set the temperature value to be maintained and set it to SP;

[0022] 2) Set the two temperature thresholds that determine the control of the refrigeration solenoid valve as T 0 and T 1 ;

[0023] 3) Set T separately 0 and T 1 Control hysteresis:

[0024] ①Set T 0 The control hysteresis is (T 0 -X d0 , T 0 +X U0 ), where X U0 >0,X d0 >0 and all are configurable variables, which is convenient for performance debugging.

[0025] ②Set T 1 The control hysteresis is (T 1 -X d1 , T 1 +X U1 ), where X U1 >0,X d1 >0 and all are configurable variables, which is convenient for performance debugging.

[0026] T 1 -X d1 >T 0 +X U0 ;

[0027] 4) When SP compares to T 1 closer to T 0 , namely SP-T ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a dual-threshold return difference control method for a refrigeration electromagnetic valve. The dual-threshold return difference control method for the refrigeration electromagnetic valve comprises the following steps: 1) setting a temperature value SP needing to be kept; 2) setting two temperature thresholds of the electromagnetic valve as T0 and T1; 3) respectively setting the control return differences of T0 and T1: (1) setting the control return difference of T0 as (T0-Xd0, T0 + XU0), wherein XU0 is greater than 0 and Xd0 is greater than 0 and is a variable, and (2) setting the control return difference of T1 as (T1-Xd1, T1 + XU1), wherein XU1 is greater than 0, Xd1 is greater than 0 and is a variable, and T1-Xd1 is greater than T0 + XU0; and 4) when SP is closer to T0 than T1, using the control return difference of T1, and otherwise, using the control return difference of T0. The dual-threshold return difference control method for the refrigeration electromagnetic valve has the advantages that the corresponding control return difference is selected to control the refrigeration electromagnetic valve by comparing the closeness degree of the temperature value needing to be kept and the two threshold values, frequent action of the electromagnetic valve can be avoided, working condition changes of the compressor are prevented, and disturbance quantity in a closed-loop control system is avoided.

Description

technical field [0001] The invention relates to a dual-threshold hysteresis control method for a refrigeration solenoid valve, and belongs to the technical field of refrigeration solenoid valve control. Background technique [0002] The refrigeration solenoid valve is suitable for no pressure difference or low pressure system. The pulse solenoid valve inputs the positive pulse signal to the inner coil of the refrigeration solenoid valve through the wire, and the working magnetic flux generated by the coil makes the moving core close and open the valve. [0003] In some pipeline structures, the control of the refrigeration solenoid valve is closely related to the cooling effect. It controls the flow of refrigerant or refrigerant in the pipeline. When the refrigeration solenoid valve is opened or closed, the cooling capacity is small, and on the contrary, the cooling capacity is large. [0004] In the existing technology, PID is generally used for regulation and control. Due t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F25B49/02
CPCF25B49/02F25B2600/2515
Inventor 王春达
Owner WUXI GUANYA REFRIGERATION TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com