Defrosting device provided with variable heating power and used for air-cooling refrigerator and control method

A technology for heating power, air-cooled refrigerators, applied in household refrigeration devices, cooling fluid circulation devices, defrosting and other directions, can solve problems such as low defrosting efficiency, avoid small frost formation, avoid energy waste, and reduce load Effect

Active Publication Date: 2020-12-11
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the problems and defects of the low defrosting efficiency of the above-mentioned electric heater, the object of the present invention is

Method used

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  • Defrosting device provided with variable heating power and used for air-cooling refrigerator and control method
  • Defrosting device provided with variable heating power and used for air-cooling refrigerator and control method
  • Defrosting device provided with variable heating power and used for air-cooling refrigerator and control method

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Example Embodiment

[0030] Implementation case

[0031] like figure 1 FIG An air heating power variation refrigerator defrosting apparatus includes an evaporator 101, electric heater 102, the electronic regulator module 103, a controller 104, a first temperature collector 105, the temperature of the second collector 106 , temperature and humidity collector 107; 101 finned tube evaporator evaporator, the evaporator 101 dimensions length × width × height 300 × 100 × 200mm.

[0032] according to image 3 As shown in a flowchart of a control method, the temperature of the first collector 105 and the second collector temperature 106 initial collection tube surface of the evaporator temperature T start = -30 ℃, coordinates of the first temperature and the second temperature 105 collector 106 are acquired (150mm, 50mm, 50mm) and (150mm, 50mm, 150mm), for defrosting end temperature T end = 10 deg.] C, the temperature range [-30,10] divided into 10 segments; Thus, each temperature rise is (10 - (- 30)) / 10 = ...

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Abstract

The invention discloses a defrosting device provided with variable heating power and used for an air-cooling refrigerator and a control method. The device consists of an evaporator, two temperature acquirers, a controller, an electronic voltage regulating module, an environmental temperature and humidity acquirer and an electric heater. According to the device disclosed by the invention, a conventional electric heater is distributed at the bottom end of the evaporator, the two temperature acquirers separately cling to the surface, close to an evaporator tube, of the electric heater and the surface, away from the evaporator tube, of the electric heater, the environmental temperature and humidity acquirer is arranged in an environment, the controller transmits a voltage regulating signal tothe electronic voltage regulating module after acquiring a surface temperature signal of the evaporator tube and an environmental temperature and humidity signal on line, and the electronic voltage regulating module regulates power of the electric heater such that defrosting, by variable-power heating, of the electric heater is realized, and thus, the defrosting device can be matched with different defrosting amount and needs, on different defrosting heat, at different stages in a frost layer melting process, and avoids a condition that heat waste is caused by too high power of the electric heater or defrosting is incomplete as a result of low power of the electric heater.

Description

technical field [0001] The invention belongs to the technical field of refrigeration, and in particular relates to a variable heating power defrosting device and a control method for an air-cooled refrigerator. [0002] technical background [0003] Air-cooled refrigerators are widely used due to automatic defrosting at regular intervals. In order to realize food freezing and refrigeration functions, household refrigerators need to run 24 hours a day. Therefore, their power consumption is always a concern, and energy saving is a long-term goal. Frosting on the evaporator of an air-cooled refrigerator will increase the heat transfer resistance of the evaporator, resulting in a decrease in the overall efficiency of the refrigeration system and an increase in power consumption. Therefore, defrosting is particularly important. The defrosting methods commonly used in refrigerators include electric heating defrosting, hot air defrosting, and liquid spray defrosting. Among them, e...

Claims

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Application Information

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IPC IPC(8): F25D21/00F25D21/08
CPCF25D21/004F25D21/08F25D2700/10F25D2700/14
Inventor 应雨铮刘国强晏刚
Owner XI AN JIAOTONG UNIV
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