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Image recognition technology-based air source heat pump defrosting system and control method thereof

An air source heat pump, image recognition technology, applied in electrical program control, program control in sequence/logic controllers, refrigerators, etc., can solve the problems of endless defrosting, wrong defrosting of the unit, etc., to improve performance , The effect of reducing false defrosting action and reducing defrosting loss

Inactive Publication Date: 2010-12-29
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The purpose and task of the present invention is to provide a defrosting control method for air source heat pumps based on image recognition technology to solve the problems of endless defrosting, non-frost defrosting and heat exchanger defrosting control methods in existing air source heat pump unit defrosting control methods. Dust on the surface causes the unit to defrost incorrectly

Method used

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  • Image recognition technology-based air source heat pump defrosting system and control method thereof
  • Image recognition technology-based air source heat pump defrosting system and control method thereof
  • Image recognition technology-based air source heat pump defrosting system and control method thereof

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Embodiment

[0043] The camera 7 is installed in the middle of the exterior of the outdoor heat exchanger 3 to capture the distribution of the frost layer on the middle of the surface of the outdoor heat exchanger 3. The specific control method is as follows:

[0044] 1) The unit controller 8 issues an instruction to control the unit to switch to the heating operation mode, and judges the time interval Δt of the unit controller received by the camera time relay. When the time interval is greater than or equal to the scanning time interval Δt of the camera in the non-defrosting process 1 =300s, execute step 2); if the time interval of the unit controller received by the time relay is less than Δt 1 , camera 7 does not work;

[0045] 2) Camera 7 according to the time interval Δt 1 The surface of the outdoor heat exchanger 3 is photographed, and the signal is transmitted to the unit controller 8, and the unit controller 8 performs filtering, sharpening and image edge extraction processing on...

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Abstract

The invention discloses an image recognition technology-based air source heat pump defrosting control method and a system, which belongs to the application field of an air conditioner heat pump technology. Based on the original system structure of the air source heat pump, a camera [7] is arranged in the middle of the outer part of an outdoor heat exchanger [3] so as to shoot the frost distribution on the surface of the outdoor heat exchanger [3]; the frosting condition on the surface of the outdoor heat exchanger is shot in real time during the heating operation of the heat pump unit, the frosting area of the surface of the outdoor heat exchanger is acquired by using the image recognition technology and the frosting operation of the heat pump unit is controlled accordingly. Compared with the traditional air source heat pump defrosting control technology, the invention effectively overcomes the defects that the frost of the outdoor heat exchanger of the heat pump unit is not removed thoroughly, the defrosting is performed when no frost exists and defrosting is mistakenly performed due to dust accumulating on the surface of the heat exchanger, reduces the defrosting loss of the heat pump unit, improves the heat performance of the unit and is particularly effective in the areas where the outdoor heat exchanger of the air source heat pump unit suffers from severe frosting.

Description

technical field [0001] The invention belongs to the application field of air-conditioning heat pumps, in particular to an image recognition technology-based air source heat pump defrosting system and a control method thereof. Background technique [0002] The air source heat pump unit is a kind of heat source equipment widely used in building air conditioning heating and hot water supply systems at present, and the biggest problem encountered by the air source heat pump unit during heating operation in winter is the frost on the surface of the outdoor heat exchanger. The formation and growth of frost increases the heat transfer resistance between the surface of the heat exchanger and the air, increases the flow resistance of the airflow through the heat exchanger, reduces the air flow through the heat exchanger, and causes the outdoor heat exchanger of the heat pump unit to The heat absorption from the air is reduced, which deteriorates the working condition of the heat pump...

Claims

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Application Information

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IPC IPC(8): F25B13/00F25B49/02F25B47/00G05B19/04
Inventor 余延顺李敏张少凡
Owner NANJING UNIV OF SCI & TECH
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