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KR-20260065681-A - Automatic Defrosting System for Cold Store

KR20260065681AKR 20260065681 AKR20260065681 AKR 20260065681AKR-20260065681-A

Abstract

The present invention provides an automatic defrosting system for a cold storage unit comprising a compressor (10), a condenser (20), an expansion valve (30), and an evaporator (40), wherein the evaporator (40) is disposed within a storage space (80) of the cold storage unit, a sensor unit (100) for detecting a frost condition is disposed on one side of the surface of the evaporator (40), and a heating device (400) for defrosting by heating the surface of the evaporator (40) according to the frost condition detected by the sensor unit (100) is disposed near the evaporator (40).

Inventors

  • 이태강

Assignees

  • 주식회사 세강산업

Dates

Publication Date
20260511
Application Date
20241101

Claims (10)

  1. In an automatic defrosting system for a cold storage unit comprising a compressor (10), a condenser (20), an expansion valve (30), and an evaporator (40), The above evaporator (40) is placed in the storage space (80) of the above cold storage, and A sensor unit (100) for detecting frost conditions is disposed on one side of the surface of the above evaporator (40), and An automatic defrosting system for a cold storage, wherein a heating device (400) that defrosts by heating the surface of the evaporator (40) according to the frost condition detected by the sensor unit (100) is positioned near the evaporator (40).
  2. In paragraph 1, An automatic defrosting system for a cold storage, further comprising a control unit (200) that receives a detection signal from the sensor unit (100), analyzes the frost condition, and outputs a driving signal to drive the heating device (400) when it is determined that defrosting is necessary.
  3. In paragraph 2, The above sensor unit (100) is a temperature sensor that detects the temperature of the surface of the evaporator (40) to detect the above frost condition and outputs a change in current according to the change in temperature as an electrical signal, in an automatic defrosting system for a cold storage.
  4. In paragraph 3, The above control unit (200) analyzes the current change output from the above sensor unit (100) in real time to analyze the frost condition, an automatic defrosting system for a cold storage.
  5. In paragraph 4, The above control unit (200) determines that defrosting is necessary when the current change satisfies a specific criterion and outputs a driving signal to drive the heating device (400), an automatic defrosting system for a cold storage.
  6. In paragraph 5, An automatic defrosting system for a low-temperature storage unit, further comprising a heating device driving unit (300) that receives the above driving signal and drives the heating device (400).
  7. In paragraph 6, The above heating device (400) is an automatic defrosting system for a low-temperature storage unit that emits far-infrared rays for defrosting.
  8. In Paragraph 7, The above control unit (200) includes a signal input unit (210) that receives a signal output from the sensor unit (100), and a signal processing unit (220) that receives data from the signal input unit (210) and analyzes the defrosting state, in an automatic defrosting system for a cold storage.
  9. In paragraph 8, An automatic defrosting system for a cold storage, further comprising a storage unit (500) that stores data output from the signal input unit (210) and the signal processing unit (220).
  10. In Paragraph 9, An automatic defrosting system for a cold storage, further comprising a display unit (600) that displays data output from the signal input unit (210) and the signal processing unit (220) on a screen.

Description

Automatic Defrosting System for Cold Store The present invention relates to an automatic defrosting system for a low-temperature storage unit that automatically implements defrosting to eliminate frost formation on the surface of an evaporator in the low-temperature storage unit. A cold storage facility is a piece of equipment designed to preserve agricultural, aquatic, and livestock products fresh for a long period by cooling the interior of an insulated room to maintain the temperature above the freezing point. In that it utilizes a refrigeration cycle consisting of the compression, condensation, expansion, and evaporation of a refrigerant, it shares the same theoretical and technical principles as air conditioning, freezers, and large cold storage warehouses. A refrigeration cycle of a cooling device, such as a cold storage unit, includes a compressor that compresses the refrigerant to high temperature and high pressure, a condenser that condenses the compressed refrigerant by exchanging heat with the surroundings, an expansion valve that expands the condensed refrigerant to low pressure, and an evaporator that evaporates the refrigerant expanded to low pressure by exchanging heat with the internal air. Through this cycle, the surface temperature of the evaporator cooling the storage space is relatively lower than the temperature of the storage space; consequently, moisture condensed from the relatively high-temperature air in the storage space adheres to the evaporator surface, causing frost to deposit. Frost deposited on the surface of the evaporator gradually thickens over time, causing a frost formation that reduces the heat exchange efficiency of the cold air passing through the evaporator, resulting in a problem of excessive power consumption. To resolve this frost phenomenon, defrosting is necessary to remove the frost. Conventionally, defrosting operations were performed by making the refrigerant flow in the opposite direction to normal operation, or by using a separate electric heater to defrost the evaporator heat exchanger where frost had formed. When defrosting with an electric heater, the heater was set to operate for a certain period of time at set intervals to perform the defrosting. However, the method of operating the heater at predetermined intervals to defrost has the problem of increasing the waste of heater power by failing to find the optimal defrosting time, resulting in an unnecessarily excessive number of defrosts, or by operating the heater after the defrosting time has passed. FIG. 1 is a figure showing a cold storage unit to which an automatic defrosting system for a cold storage unit according to one embodiment of the present invention is applied. FIG. 2 is a block diagram briefly illustrating an automatic defrosting system for a cold storage facility according to one embodiment of the present invention. Hereinafter, an embodiment of an automatic defrosting system for a cold storage facility according to the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 shows a cold storage unit to which an automatic defrosting system for a cold storage unit according to one embodiment of the present invention is applied, and FIG. 2 is a block diagram briefly showing an automatic defrosting system for a cold storage unit according to one embodiment of the present invention. Referring to FIGS. 1 and 2, in an automatic defrosting system for a cold storage facility according to one embodiment of the present invention, an evaporator (40) is disposed within a storage space (80) of a cold storage facility comprising a compressor (10), a condenser (20), an expansion valve (30), and an evaporator (40). A sensor unit (100) for detecting a frosted state is disposed on one side of the surface of the evaporator (40), and a heating device (400) for defrosting by heating the surface of the evaporator (40) according to the frosted state detected by the sensor unit (100) is disposed near the evaporator (40). The automatic defrosting system of the above-described cold storage further includes a control unit (200), wherein the control unit (200) receives a detection signal from the sensor unit (100), analyzes the frost condition, and outputs a driving signal to drive the heating device (400) when it is determined that defrosting is necessary. The sensor unit (100) may be a temperature sensor that detects the temperature of the surface of the evaporator (40) to detect the frost condition and outputs a change in current or change in electromotive force as an electrical signal according to the change in temperature. The control unit (200) analyzes the current change output from the sensor unit (100) in real time to analyze the frost state. The control unit (200) includes a signal input unit (210) that receives a signal output from the sensor unit (100), and a signal processing unit (220) that receives data from the signal input unit (210) and analyzes the status of the condition. The