Supercharge Your Innovation With Domain-Expert AI Agents!

Variable frequency system and method and device for controlling same

A frequency conversion system and control method technology, applied in the field of frequency conversion control, can solve the problem that the frequency conversion system cannot realize the optimal COP frequency automatic control, and achieve the effect of high COP

Active Publication Date: 2014-05-07
GREE ELECTRIC APPLIANCES INC
View PDF5 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a frequency conversion system and its control method and control device to solve the problem that the frequency conversion system cannot realize the automatic control of the optimal COP frequency

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
  • Variable frequency system and method and device for controlling same
  • Variable frequency system and method and device for controlling same
  • Variable frequency system and method and device for controlling same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0034] First, an example of the frequency conversion system provided in this specific implementation manner is described.

[0035] figure 1 is a block diagram of a frequency conversion system according to an embodiment of the present invention, such as figure 1 As shown, the frequency conversion system includes a compressor, a condenser, an evaporator, a throttling device (not shown in the figure) and a controller, wherein, during the operation of the frequency conversion system, the controller calculates and compares the For the COP of the corresponding frequency conversion system, adjust the frequency according to the frequency and COP. When the COP corresponding to the higher frequency is ...

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 discloses a variable frequency system and a method and device for controlling the variable frequency system. The method includes the steps of firstly, determining a first gas suction enthalpy value h1, a first gas exhaust enthalpy value h2 and a first condenser enthalpy value h3 of the variable frequency system when the running frequency of a compressor of the variable frequency system is the first frequency f1; secondly, determining a first COP according to h1, h2 and h3; thirdly, determining a second gas suction enthalpy value h1', a second gas exhaust enthalpy value h2' and a second condenser enthalpy value h3' of the variable frequency system when the running frequency of the compressor is the second frequency f2; fourthly, determining a second COP according to h1', h2' and h3'; fifthly, adjusting the second frequency f2 according to the size relation of the first frequency f1 and the second frequency f2 and the size relation of the first COP and the second COP. Through the method, the running frequency of the compressor can be automatically adjusted according to the enthalpy values, and therefore the variable frequency system has the high COP under various working conditions.

Description

technical field [0001] The present invention relates to the field of frequency conversion control, in particular to a frequency conversion system and its control method and control device. Background technique [0002] Compared with traditional fixed-frequency systems, such as fixed-frequency heat pump water heaters, fixed-frequency single cooling air-conditioning systems, and fixed-frequency heat pump air-conditioning systems, frequency conversion systems have the advantages of high energy efficiency at room temperature and high capacity at low temperature. For example, the water heater of the inverter water heater can operate at the frequency with the highest Coefficient of Performance (COP) under any environmental and water temperature conditions. However, with the change of working conditions such as water temperature and ambient temperature, the frequency corresponding to the optimal COP will change when the frequency conversion system is running, so that the automatic ...

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
Inventor 黄娟董明珠谭建明李绍斌柳飞袁明征
Owner GREE ELECTRIC APPLIANCES INC
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com