Draught fan current based air source heat pump defrosting remote monitoring system and control method

An air source heat pump, remote monitoring technology, applied in defrosting, lighting and heating equipment, household appliances, etc., can solve the problems of untimely defrosting, false defrosting, and low defrosting efficiency, and achieve the effect of reducing inefficiency

Pending Publication Date: 2020-02-11
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of low defrosting efficiency and poor defrosting effect caused by untimely defrosting and wrong defrosting in traditional cases, this paper proposes a remote monitoring system and monitoring method for air source heat pump defrosting based on fan current

Method used

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  • Draught fan current based air source heat pump defrosting remote monitoring system and control method
  • Draught fan current based air source heat pump defrosting remote monitoring system and control method

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Embodiment 1

[0026] Such as figure 1 As shown, the air source heat pump defrosting remote monitoring system based on fan current in this embodiment includes an air source heat pump circulation system 11, a fan 12 of an air source heat pump evaporator, an AC power supply 13, a data acquisition module 14, and a data conversion module 15. Data diagnosis module 16, defrosting control module 17, remote monitoring module 18, current measuring device 21, wireless signal transmitter 31, wireless signal receiver 32, control signal transmitter 33, control signal receiver 34.

[0027] The fan 12 of the air source heat pump evaporator is used to increase the wind speed around the evaporator in the air source heat pump circulation system 11 to realize forced convection, and the current measuring device 21 is connected between the fan 12 of the air source heat pump evaporator and the AC power supply 13 On the wire between, the data acquisition module 14, the data conversion module 15, and the data diagn...

Embodiment 2

[0037] Such as figure 2 As shown, this embodiment provides a remote monitoring method for air source heat pump defrosting based on fan current, which at least includes the following steps:

[0038] S1, collecting the current signal of the air source heat pump evaporator fan in real time;

[0039] S2. Perform data preprocessing on the current signal: obtain macroscopic features, and sequentially perform filtering, demodulation, decomposition and reconstruction operations on the current signal to obtain data information;

[0040] S3, using a feature extraction algorithm to perform time domain and frequency domain analysis on the data information, and extract feature data values;

[0041] S4, using machine learning methods to perform signal recognition on characteristic data values, classifying and diagnosing frosting conditions;

[0042] S5. Perform defrosting control according to the diagnosed frosting situation.

[0043] S6. Remotely monitor the current signal and make a r...

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Abstract

The invention provides a draught fan current based air source heat pump defrosting remote monitoring system and a control method, The system involves a current measuring device for measuring a currentsignal of an air source heat pump evaporator fan in real time, a data conversion module used for smoothing, demodulating, decomposing and reconstructing the current signal, acquiring data information, carrying out time domain and frequency domain analysis by using a feature extraction algorithm, and extracting a feature data value, a data diagnosis module used for carrying out signal identification, classification and diagnosis on the feature data value by using a machine learning method, and a defrosting module used for carrying out defrosting control on an air source heat pump evaporator according to the diagnosis frosting condition. According to the draught fan current based air source heat pump defrosting remote monitoring system and the control method, the collected draught fan current data is subjected to data preprocessing and feature extraction, and then data analysis such as the machine learning is combined, so that the outdoor side heat exchanger frosting condition of the air source heat pump is judged, a fault can be found early and cleared, and an air source heat pump unit is guaranteed to operate in an efficient state.

Description

technical field [0001] The invention belongs to the technical field of heat pump defrosting, and in particular relates to a remote monitoring system and monitoring method for air source heat pump defrosting based on fan current. Background technique [0002] Air source heat pump technology is an energy-saving and environmentally friendly heating technology based on the reverse Carnot cycle principle. The air source heat pump system obtains a low-temperature heat source through natural energy (air heat storage), which becomes a high-temperature heat source after the system's efficient heat collection and integration, and is used for heating or hot water supply. Air source heat pumps have a wide range of applications, low operating costs, no pollution to the environment, and good energy saving and emission reduction effects. They have been widely used in chemical, thermal energy, heating, HVAC and other fields. [0003] Although air source heat pumps are widely used in urban ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25D21/02
CPCF25D21/02
Inventor 徐英杰陈宁
Owner ZHEJIANG UNIV OF TECH
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