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Intelligent defrosting method for refrigerating system based on evaporation temperature difference and refrigerating system

A refrigeration system and evaporation temperature technology, applied in defrosting, refrigerators, refrigeration components, etc., can solve the problems of large amount of frost in the evaporator, affecting the refrigeration effect, and the decline in refrigeration efficiency

Pending Publication Date: 2021-04-30
天津华冷科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the defrosting of the refrigeration system mostly adopts the method of timing defrosting, and the defrosting control is carried out according to a fixed time interval. If the frost is not timely, the amount of frost in the evaporator will be too large, and the cooling efficiency of the system will decrease.

Method used

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  • Intelligent defrosting method for refrigerating system based on evaporation temperature difference and refrigerating system
  • Intelligent defrosting method for refrigerating system based on evaporation temperature difference and refrigerating system
  • Intelligent defrosting method for refrigerating system based on evaporation temperature difference and refrigerating system

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Experimental program
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Effect test

Embodiment 1

[0024] A method for intelligent defrosting of refrigeration systems based on evaporation temperature difference, such as figure 1 shown, including the following steps:

[0025] 1) After the refrigeration system is turned on, it is judged according to the current storage temperature. When the storage temperature is higher than the start-up temperature set by the refrigeration system, it will enter the cooling state, otherwise it will enter the standby state;

[0026] 2) Calculate the current evaporation temperature difference T according to the current return air temperature and low pressure in the cooling state K , the evaporation temperature difference is defined as the difference between the return air temperature and the evaporation temperature (converted from low pressure);

[0027] 3) Obtain the evaporation temperature T of the system pre-measured by the system according to the current return air temperature look-up table S , and calculate the difference T of the curren...

Embodiment 2

[0039] A refrigeration system with intelligent defrosting, such as figure 2 As shown, it includes an evaporator, a compressor, and a condenser. A circuit is formed by a pipeline, and the pipeline is filled with refrigerant. The low-pressure pressure section of the circuit is equipped with a low-pressure pressure sensor, that is, a low-pressure The pressure sensor is used to measure the pressure of the current low pressure. The high pressure section of the circuit is equipped with a high pressure sensor, that is, the pipeline between the compressor and the condenser is equipped with a high pressure sensor, which is used to measure the pressure of the current high pressure. ; There is an electronic expansion valve between the condenser and the evaporator, which is used for pressure regulation and throttling; there is also a branch circuit on the circuit, which is arranged in parallel with the condenser and the electronic expansion valve, and a bypass solenoid valve is set on the...

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Abstract

The invention discloses an intelligent defrosting method for a refrigerating system based on an evaporation temperature difference and the refrigerating system, and belongs to a refrigerating technology. The characteristics of strong repeatability and time lag of the refrigerating system in a normal operation state are used, on the basis of mark point data of the evaporation temperature pre-measured by the system, through adoption of the situation that the evaporation temperature difference of the system deviates from a preset point at the moment, the frosting condition of an evaporator of the refrigerating system is judged, and a defrosting process of the refrigerating system is performed as required to finish the on-demand defrosting of the refrigerating system. According to the method, the frost amount of the evaporator can only be predicted and judged, a reliable basis is provided for on-demand defrosting of the refrigerating system, the overall operation efficiency of the refrigerating system is improved, and the purposes of effectively saving energy and reducing consumption are achieved.

Description

technical field [0001] The invention relates to the technical field of refrigeration, in particular to intelligent control technology, in particular to a method for intelligent defrosting of a refrigeration system based on evaporation temperature difference. Background technique [0002] The refrigeration system cools down the refrigeration space, so that the water vapor in the refrigeration space precipitates and adheres to the inner wall of the refrigeration space or the refrigeration surface of the refrigeration system. The long-term operation of the refrigeration system will condense more frost or accumulate into ice on the refrigeration surface. , Frosting will affect the cooling effect of the refrigeration system, and if it is not removed in time, it will seriously affect the working effect and efficiency of the refrigeration system. [0003] Defrost control has always been a technical difficulty in refrigeration systems, especially commercial refrigeration systems. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25D21/06F25B41/40F25B41/31F25B49/00
CPCF25D21/06F25B49/00
Inventor 程如岐高艺刘卫星赵二刚张红宾
Owner 天津华冷科技有限公司
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