KR20160103857A - Automatic defrosting system, method, and medium having computer program - Google Patents

Automatic defrosting system, method, and medium having computer program Download PDF

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Publication number
KR20160103857A
KR20160103857A KR1020150026773A KR20150026773A KR20160103857A KR 20160103857 A KR20160103857 A KR 20160103857A KR 1020150026773 A KR1020150026773 A KR 1020150026773A KR 20150026773 A KR20150026773 A KR 20150026773A KR 20160103857 A KR20160103857 A KR 20160103857A
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South Korea
Prior art keywords
temperature
sensor
temperature measured
evaporator
defrost
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KR1020150026773A
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Korean (ko)
Inventor
박찬영
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주식회사 리프코리아
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Priority to KR1020150026773A priority Critical patent/KR20160103857A/en
Publication of KR20160103857A publication Critical patent/KR20160103857A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/06—Removing frost
    • F25D21/08—Removing frost by electric heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/005—Mounting of control devices
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/10—Sensors measuring the temperature of the evaporator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/12—Sensors measuring the inside temperature

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • Theoretical Computer Science (AREA)
  • Software Systems (AREA)
  • General Physics & Mathematics (AREA)
  • Defrosting Systems (AREA)

Abstract

According to an embodiment of the present invention, there is provided a refrigerator including: a heater capable of heating the evaporator to remove a property generated in an evaporator located in a freezing storage; A defrost sensor positioned in the evaporator and measuring the temperature; An intracorporeal sensor positioned at the freezing storage for measuring the temperature; And a controller for controlling on and off of the heater, wherein the controller is provided with a temperature measured by the defrost sensor and a temperature measured by the internal sensor, wherein the temperature measured by the defrost sensor and the temperature If the temperature difference DT measured by the sensor is equal to or greater than the reference value, it is determined that the refrigerant is at least one of a deficiency of refrigerant, defective operation, and fan failure. If the defrosting operation is determined to be necessary, A defrost system is disclosed. As a result, power consumed due to unnecessary defrosting operation can be saved.

Description

[0001] The present invention relates to an automatic defrosting system, method, and medium having computer program recorded thereon,

The present invention relates to an automatic defrost system, a method, and a medium on which a computer program is recorded.

In a refrigeration warehouse / refrigerated warehouse, a refrigerated warehouse, a refrigerated showcase, etc. (hereinafter collectively referred to as a "refrigerator warehouse") storing foods or processed products, defrosting operations for removing frost .

Conventionally, the defrosting operation is mostly performed by a method referred to as a 'periodic time defrosting'. In this method, a heater (not shown) is installed for a predetermined time (for example, 4 hours to 6 hours) Electric bar ...) to remove the gaps.

   However, the cyclic time-series phase can cause frequent temperature changes in the freezer or the freezer warehouse, causing damage to the food or product near the heater, raising the temperature (over 30 ° C) and repeating the operation to lower the temperature again Minus 20 degrees Celsius in the case of a frozen warehouse).

1 shows a defrost operation according to the result of a conventional periodic time defrost. Referring to FIG. 1, it can be seen that the defrosting is performed every 6 hours. In this case, frequent defrosting operation damages the products stored in the freezing warehouse, increases the time for operating the electronic valve for the refrigeration operation, .

According to an embodiment of the present invention, an automatic defrost system, a method, and a medium on which a computer program is recorded are provided.

According to an embodiment of the present invention, there is provided a refrigerator including: a heater capable of heating the evaporator to remove a property generated in an evaporator located in a freezing storage; A defrost sensor positioned in the evaporator and measuring the temperature; An intracorporeal sensor positioned at the freezing storage for measuring the temperature; And a controller for controlling on / off of the heater,

Wherein the controller is provided with a temperature measured by the defrost sensor and a temperature measured by the high temperature sensor, wherein a difference (DT) between a temperature measured by the defrost sensor and a temperature measured by the high temperature sensor is not less than a reference value The controller determines that the defrosting operation is at least one of a refrigerant deficiency, a defrosting operation, and a fan malfunction. When the defrosting operation is determined to be necessary, the defrosting operation is performed by turning on the heater.

According to another embodiment of the present invention, there is provided a refrigerator comprising: a controller for controlling a heater capable of heating the evaporator to remove a property generated in an evaporator located in a freezer,

Turning on an electromagnetic valve for turning on and off the supply of the refrigerant provided to the evaporator and operating a blowing fan located inside the freezing storage to circulate the air passing through the evaporator;

Calculating a difference (DT) between the temperature measured by the defrost sensor located in the evaporator and the temperature measured by the internal sensor and the temperature measured by the internal sensor located in the freezer warehouse; And

Determining whether the difference DT between the temperature measured by the defrost sensor and the temperature measured by the high-temperature sensor is equal to or greater than a reference value, at least one of refrigerant deficiency, defrosting operation, and fan failure; A computer program for executing a method,

And the computer program causes the heater to be turned on to perform the defrosting operation when it is determined that the defrost operation is necessary.

According to another aspect of the present invention, there is provided a refrigerator comprising: an evaporator disposed in a freezer compartment; an electromagnetic valve for turning on / off the supply of the refrigerant provided in the freezer compartment; and a blower fan disposed inside the freezer compartment for circulating air passing through the evaporator ; Calculating a difference (DT) between the temperature measured by the defrost sensor located in the evaporator and the temperature measured by the internal sensor and the temperature measured by the internal sensor located in the freezer warehouse; Determining whether the difference DT between the temperature measured by the defrost sensor and the temperature measured by the high-temperature sensor is equal to or greater than a reference value, at least one of refrigerant deficiency, defrosting operation, and fan failure; And performing a defrosting operation by turning on a heater capable of heating the evaporator to remove a property generated in the evaporator when the defrosting operation is determined to be necessary have.

According to one or more embodiments of the present invention, 30-40% or more of the existing power consumption can be reduced, and the temperature in the freezing warehouse can be maintained at more than 20% uniformly.

According to one or more embodiments of the present invention, it is possible to grasp the failure of the equipment in real time, and to reduce the load of equipment by efficient operation.

1 is a view for explaining a conventional defrosting technique.
2 is a view for explaining an automatic defrost system according to an embodiment of the present invention.
3 is a view for explaining an automatic defrosting method according to an embodiment of the present invention.
4 is a view for explaining an automatic defrosting method according to another embodiment of the present invention.
5 is a diagram for explaining effects according to embodiments of the present invention.
6 is a view for explaining the difference between the defrost temperature and the internal temperature according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features, and advantages of the present invention will become more readily apparent from the following description of preferred embodiments with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments disclosed herein are provided so that the disclosure can be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

In this specification, when an element is referred to as being on another element, it may be directly formed on another element, or a third element may be interposed therebetween.

Also, terms used herein are for the purpose of illustrating embodiments and are not intended to limit the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. The terms "comprises" and / or "comprising" used in the specification do not exclude the presence or addition of one or more other elements.

Hereinafter, the present invention will be described in detail with reference to the drawings. In describing the specific embodiments below, various specific details have been set forth in order to explain the invention in greater detail and to assist in understanding it. However, it will be appreciated by those skilled in the art that the present invention may be understood by those skilled in the art without departing from such specific details. In some instances, it should be noted that portions of the invention that are not commonly known in the description of the invention and are not significantly related to the invention do not describe confusing reasons for explaining the present invention.

2 is a view for explaining an automatic defrost system according to an embodiment of the present invention.

Referring to FIG. 2, the automatic defrost system according to an embodiment of the present invention includes a heater (not shown) capable of heating the evaporator 1 to remove the property generated in the evaporator 1 located in the freezing warehouse 10 A defrosting sensor 13 located in the evaporator 1 for measuring the temperature, a high-temperature sensor 15 located in the freezing warehouse 10 for measuring the temperature, and a controller for controlling the on- (17). For reference purposes, a condenser 3, a compressor 5, an expansion valve 7, an electronic valve 9, and a blower fan 19 are additionally shown for the purpose of the present invention.

The compressor (5) receives the gaseous refrigerant flowing out through the evaporator (1), compresses it, and converts it into a gas state at high temperature and high pressure.

The high-temperature, high-pressure gas that has passed through the compressor 5 is converted into refrigerant in a liquid state at a middle temperature and a high pressure in the condenser 3 and is transferred to the expansion valve 7.

In the expansion valve 7, the refrigerant is converted into low-temperature and low-pressure liquid refrigerant and is transferred to the evaporator 1.

In the evaporator 1, a low-temperature and low-pressure liquid state absorbs heat from ambient air, is converted into gas, and is then transferred to the compressor 5.

The evaporator 10 is equipped with a heater 11. When the evaporator 10 is frozen, the controller 17 turns on the heater 11 to perform a defrosting operation (an operation of heating the heater 11 to melt the frost) .

The electronic valve 9 is for controlling the amount of refrigerant transferred to the evaporator 1 under the control of the controller 17. When the electronic valve 9 is turned on, the refrigerant is moved to the evaporator 1. The controller 17 turns the electromagnetic valve 9 on or off so that the internal temperature of the freezer compartment 10 is maintained in accordance with the set temperature.

The blowing fan 19 circulates the air in the evaporator 1 so that the heat exchange between the refrigerant and the ambient air is performed well.

The controller 17 includes an electromagnetic valve 9 for turning on and off the supply of the refrigerant to the evaporator 1 and a blowing fan 19 for circulating air passing through the evaporator 1, Can be controlled. For example, when the electromagnetic valve 9 is turned on, the refrigerant flowing out of the condenser 3 is moved to the evaporator 1, and the blowing fan 19 is also rotated.

According to one embodiment of the present invention, the controller 17 receives the in-housing temperature T1 measured by the intracorporeal sensor 15 and the defrost temperature T2 measured by the defrost sensor 13, (DT = | T2-T1 |) between the defrost temperature T2 measured by the internal temperature sensor 13 and the internal temperature T1 measured by the internal sensor 15 is calculated. When DT becomes equal to or greater than the reference value, (&Quot; defrost operation required "). In this case, the controller 17 turns on the heater 11 to perform the defrosting operation.

Here, the reference value may be a predetermined value, for example, a value determined in an experience (an experience obtained as a result of operation of a test or existing defrosting system).

Referring to FIG. 6, the meaning of the temperature difference DT between the internal temperature T1 and the defrosting temperature T2 can be understood. When the evaporator (1) is frozen, heat exchange is not performed well, and in such a case, the temperature difference between the internal temperature and the defrost temperature becomes large.

According to another embodiment of the present invention, when DT becomes equal to or greater than the reference value, the controller 17 can determine that the refrigerant is deficient or that the fan has failed.

According to another embodiment of the present invention, the controller 17 determines that at least one of refrigerant deficiency, defrosting operation, and fan failure occurs when DT becomes equal to or greater than the reference value, ) To turn on the defrosting operation.

According to another embodiment of the present invention, the controller 17 determines whether the difference DT between the temperature measured by the defrost sensor 13 and the temperature measured by the high-temperature sensor 15 is equal to or greater than the reference value, It can be judged that it is at least one of a refrigerant shortage, a defrosting operation necessity, and a fan failure.

According to another embodiment of the present invention, the controller 17 determines whether the difference DT between the temperature measured by the defrost sensor 13 and the temperature measured by the internal sensor 15 is equal to or greater than the reference value, ), It is determined that the defrost operation is necessary, and the defrosting operation is performed by turning on the heater 11. [ 6 (b), if the temperature difference DT between the defrosting temperature T2 and the internal temperature T1 is longer than a predetermined reference time, the controller 17 judges that the operation is necessary for recycling The heater 11 can be turned on to perform the defrosting operation.

According to another embodiment of the present invention, the controller 17 turns on the electromagnetic valve 9 to supply the refrigerant to the evaporator 1, and supplies the refrigerant to the defrosting sensor 13 The defrosting operation is necessary, and the fan failure (DTL) is equal to or greater than the reference value when the difference DT between the temperature measured by the temperature sensor 15 and the temperature measured by the high- It can be judged that it is at least one of them.

According to another embodiment of the present invention, the controller 17 determines whether or not the time when the refrigerant is supplied to the evaporator 1 when the electromagnetic valve 9 is turned on (i.e., the time when the refrigerant is supplied to the evaporator 1) Time or more. For example, the controller 17 can know the time when the electronic valve 9 is turned on based on a predetermined period (for example, 1 day (24 hours)). In this case, the controller 17 determines whether or not the time when the electromagnetic valve 9 is turned on for a predetermined period is longer than the reference time, and the temperature T2 measured by the defrost sensor 13 and the temperature T1 is greater than or equal to the reference time DTL, it can be determined to be either 'defrost operation required' or fan failure. Here, the reference time is a value that can be determined from experience (experience obtained as a result of operation of a test or existing defrosting system).

According to another embodiment of the present invention, the controller 17 determines whether or not the time when the refrigerant is supplied to the evaporator 1 for a predetermined period is longer than the reference time, the temperature T2 measured by the defrost sensor 13, The time DTL during which the difference DT of the temperature T1 measured by the temperature sensor 15 is maintained is equal to or longer than the reference time and the temperature measured by the defrost sensor 13 and the temperature measured by the internal sensor 15 Is higher than the reference temperature, it can be determined that the fan has failed.

According to another embodiment of the present invention, the controller 17 determines whether or not the time when the refrigerant is supplied to the evaporator 1 for a predetermined period is longer than the reference time, the temperature T2 measured by the defrost sensor 13, The time DTL during which the difference DT of the temperature T1 measured by the temperature sensor 15 is maintained is equal to or longer than the reference time and the temperature measured by the defrost sensor 13 and the temperature measured by the internal sensor 15 It is determined that the defrosting operation is not necessary, and the defrosting operation can be performed by turning on the heater 11.

In accordance with one embodiment of the present invention, it may be implemented in the form of a computer program stored on a medium in combination with the hardware of the controller 17 to perform the above-described operations of the controller 17. [

For example, a computer program is stored in a recording medium (not shown) (for example, RAM, SSD, HDD) provided in the controller 17 and is supplied to the evaporator 1 located in the freezing warehouse 10 Operating the blower fan (19) for circulating air passing through the evaporator (1) located inside the freezer compartment (10) by turning on the electronic valve (9) for turning on and off the supply of the refrigerant, Calculating a difference (DT) between the temperature measured by the defrost sensor (13) for measuring the temperature and the temperature measured by the internal sensor (15) positioned in the freezer compartment (10) When the difference DT between the temperature measured by the defrost sensor 13 and the temperature measured by the internal sensor 15 is equal to or greater than the reference value, it is judged that at least one of refrigerant deficiency, defrosting operation, , And if it is determined that the defrost operation is necessary, the evaporator (1) It turns on the heater 11 to heat the device 1 it is possible to perform a method for performing a defrosting operation.

Alternatively, the computer program may be stored in a computer-readable storage medium having stored therein a computer program for causing a computer to execute the steps of: determining whether or not the time when the refrigerant is supplied to the evaporator 1 is equal to or longer than the reference time and the difference between the temperature measured by the defrost sensor 13 and the temperature measured by the high- ) Is longer than the reference time and the temperature measured by the defrost sensor 13 and the temperature measured by the high-temperature sensor 15 become higher than the reference temperature, it can be determined that the fan has failed.

Alternatively, the computer program may be stored in a computer-readable storage medium having stored therein a computer program for causing a computer to execute the steps of: determining whether or not the time when the refrigerant is supplied to the evaporator 1 is equal to or longer than the reference time and the difference between the temperature measured by the defrost sensor 13 and the temperature measured by the high- (DTL) is equal to or longer than the reference time and the temperature measured by the defrost sensor 13 and the temperature measured by the high-temperature sensor 15 are maintained below the reference temperature, it is determined that the defrosting operation is necessary have.

3 is a view for explaining an automatic defrosting method according to an embodiment of the present invention.

Referring to FIG. 3, an automatic defrosting method according to an embodiment of the present invention may be implemented by the controller 17 described above. For example, the automatic defrosting method may be implemented by a computer program, such as firmware, .

2 and 3, an automatic defrosting method according to an embodiment of the present invention includes a step S101 of checking a set temperature, a step S103 of turning on an electronic valve 9, a defrosting sensor 13 A step S105 of calculating a difference DT between the measured temperature and the temperature measured by the intracorpore sensor 15, a step S107 of determining whether DT is equal to or greater than a reference value, (S109); performing a defrosting operation (S111) if the DTL is equal to or longer than the reference time; and completing the defrosting operation (S113).

Step S101 is a step of checking a target temperature (set temperature) in the freezing warehouse 10. When the temperature inside the freezing warehouse 10 becomes higher than the target temperature (set temperature), step S103 is performed. The controller 17 can know whether the temperature inside the freezer compartment 10 is maintained at the target temperature by the temperature measured by the intracorporeal sensor 15. [

In step S103, when the temperature inside the freezer compartment 10 becomes higher than the target temperature, the controller 17 turns on the electromagnetic valve 9 so that the refrigerant condensed by the condenser 3 is supplied to the evaporator 1 . In step S103, the blowing fan 19 can also be operated.

In the present embodiment, if the result of step S109 indicates that the DTL is equal to or longer than the reference time, it is determined that the recollection operation is necessary, and the recollection operation is performed. However, the embodiment may be implemented differently. For example, when the difference DT between the temperature measured by the defrost sensor 13 and the temperature measured by the high-temperature sensor 15 is equal to or greater than the reference value, at least one of the refrigerant deficiency, defrosting operation, It can be judged to be either. If it is determined that the refrigerant is insufficient, the controller 17 will control the electronic valve 9 to further increase the time for supplying the refrigerant. If it is determined that the fan has failed, the administrator will be informed of the fan failure. As another example, when the time when the refrigerant is supplied to the evaporator 1 is longer than the reference time and the difference DT between the temperature measured by the defrost sensor 13 and the temperature measured by the high-temperature sensor 15 is larger than the reference If the temperature measured by the defrost sensor 13 and the temperature measured by the internal sensor 15 are maintained below the reference temperature, it can be determined that the defrost operation is necessary.

4 is a view for explaining an automatic defrosting method according to another embodiment of the present invention.

4, an automatic defrosting method according to an embodiment of the present invention may be implemented by the controller 17 described above, and may be implemented as a computer program, such as firmware, .

2 and 4, an automatic defrosting method according to an embodiment of the present invention includes a step S101 of checking a set temperature, a step S103 of turning on an electronic valve 9, a defrosting sensor 13 A step S105 of calculating a difference DT between the measured temperature and the temperature measured by the intracorpore sensor 15, a step S107 of determining whether DT is equal to or greater than a reference value, (S109). If the defrosting operation has been performed in the past (S110), it is determined whether or not the defrosting operation has been performed in the past (S111) of performing a defrosting operation (S111) when the defrosting operation is the first time or when a predetermined time has elapsed from the time when the most recent defrosting operation has been executed, Includes the step of completing (S113) can do.

The automatic defrosting method described with reference to Fig. 4 is different from the automatic defrosting method described with reference to Fig. 3 in that, when a defrosting operation has been performed recently, the defrosting operation is performed after a predetermined time has elapsed without immediately performing defrosting operation .

6 is a view for explaining the difference between the defrost temperature and the internal temperature according to an embodiment of the present invention.

FIG. 6 shows the results of automatic defrosting according to an embodiment of the present invention. It can be seen that defrosting operation was performed only once during two days. 1, when the periodic time defrosting is performed according to the prior art, the defrosting operation is performed seven times in two days. Thus, it can be seen that the present invention has a great effect of saving power due to the defrosting operation.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, And variations are possible.

1: Evaporator 3: Condenser
5: compressor 7: expansion valve
9: Electronic valve 11: Heater
13: defrosting sensor 15:
17: controller 19: blowing fan

Claims (13)

A heater capable of heating the evaporator to remove a property generated in the evaporator located in the freezing storage;
A defrost sensor positioned in the evaporator and measuring the temperature;
An intracorporeal sensor positioned at the freezing storage for measuring the temperature; And
And a controller for controlling on / off of the heater,
Wherein the controller is provided with a temperature measured by the defrost sensor and a temperature measured by the high temperature sensor, wherein a difference (DT) between a temperature measured by the defrost sensor and a temperature measured by the high temperature sensor is not less than a reference value The controller determines that the defrosting operation is at least one of a refrigerant deficiency, a defrosting operation, and a fan failure, and when the defrosting operation is determined to be necessary, the defrosting operation is performed by turning on the heater. The method according to claim 1,
The controller comprising:
If at least one of a refrigerant deficiency, a defrosting operation necessity, and a fan failure is satisfied if a state DT in which the difference DT between the temperature measured by the defrost sensor and the temperature measured by the in- The automatic defrost system comprising: 3. The method of claim 2,
Wherein the controller further controls the operation of the electromagnetic valve for turning on and off the supply of the refrigerant to the evaporator and controls the operation of the blower fan located inside the freezer compartment to circulate the air passing through the evaporator,
Wherein the controller is configured to control the defrosting device such that a difference (DT) between a temperature measured by the defrost sensor and a temperature measured by the high-temperature sensor is smaller than a reference value (DTL) is longer than the reference time (DTL), it is judged to be at least one of a refrigerant shortage, a defrosting operation necessity, and a fan failure. The method of claim 3,
Wherein the controller is further configured to determine whether the time when the refrigerant is supplied to the evaporator when the electromagnetic valve is turned on is equal to or longer than a reference time and the time when the refrigerant is supplied to the evaporator is equal to or longer than a reference time, And when the temperature difference DT measured by the internal temperature sensor is greater than or equal to the reference time DTL, it is determined that the defrosting operation is required or the fan is malfunctioning. 5. The method of claim 4,
Wherein the controller is further configured to determine whether or not the time when the refrigerant is supplied to the evaporator is equal to or longer than the reference time and the difference DT between the temperature measured by the defrost sensor and the temperature measured by the high- And when the temperature measured by the defrost sensor and the temperature measured by the high-temperature sensor become higher than the reference temperature, it is determined that the fan has failed. 5. The method of claim 4,
Wherein the controller is further configured to determine whether or not the time when the refrigerant is supplied to the evaporator is equal to or longer than the reference time and the difference DT between the temperature measured by the defrost sensor and the temperature measured by the high- And when it is determined that the temperature measured by the defrost sensor and the temperature measured by the internal sensor are maintained below the reference temperature, it is determined that the defrost operation is necessary. And a controller coupled to the controller for controlling the heater capable of heating the evaporator so as to eliminate the malfunction occurring in the evaporator located in the freezer,
Turning on an electromagnetic valve for turning on and off the supply of the refrigerant provided to the evaporator and operating a blowing fan located inside the freezing storage to circulate the air passing through the evaporator;
Calculating a difference (DT) between the temperature measured by the defrost sensor located in the evaporator and the temperature measured by the internal sensor and the temperature measured by the internal sensor located in the freezer warehouse; And
Determining whether the difference DT between the temperature measured by the defrost sensor and the temperature measured by the high-temperature sensor is equal to or greater than a reference value, at least one of refrigerant deficiency, defrosting operation, and fan failure; A computer program for executing a method,
Wherein the computer program causes the heater to be turned on to perform the defrosting operation when it is determined that the defrosting operation is necessary. 8. The method of claim 7,
The computer program comprising:
If at least one of a refrigerant deficiency, a defrosting operation necessity, and a fan failure is satisfied if a state DT in which the difference DT between the temperature measured by the defrost sensor and the temperature measured by the in- ≪ / RTI > 9. The method of claim 8,
The computer program comprising:
Wherein the time when the refrigerant is supplied to the evaporator is equal to or longer than a reference time and the difference DT between the temperature measured by the defrost sensor and the temperature measured by the high temperature sensor continues for the reference time DTL or longer, Is judged to be a fan failure if the temperature measured by the high-temperature sensor and the temperature measured by the high-temperature sensor become higher than the reference temperature. 9. The method of claim 8,
The computer program comprising:
Wherein the time when the refrigerant is supplied to the evaporator is equal to or longer than a reference time and the difference DT between the temperature measured by the defrost sensor and the temperature measured by the high temperature sensor continues for the reference time DTL or longer, Determines that a defrost operation is necessary if the temperature measured by the high-temperature sensor and the temperature measured by the high-temperature sensor are maintained below the reference temperature. Operating a blowing fan for circulating air passing through the evaporator located inside the freezing warehouse by turning on an electronic switch for turning on and off the supply of the refrigerant to the evaporator located in the freezing warehouse;
Calculating a difference (DT) between the temperature measured by the defrost sensor located in the evaporator and the temperature measured by the internal sensor and the temperature measured by the internal sensor located in the freezer warehouse;
Determining whether the difference DT between the temperature measured by the defrost sensor and the temperature measured by the high-temperature sensor is equal to or greater than a reference value, at least one of refrigerant deficiency, defrosting operation, and fan failure; And
And performing a defrost operation by turning on a heater capable of heating the evaporator in order to remove a property generated in the evaporator when the defrost operation is determined to be necessary. 12. The method of claim 11,
Wherein the determining step comprises:
Wherein the time when the refrigerant is supplied to the evaporator is equal to or longer than a reference time and the difference DT between the temperature measured by the defrost sensor and the temperature measured by the high temperature sensor is maintained over the reference time, And when the temperature measured by the high-temperature sensor becomes higher than the reference temperature, it is judged that the fan has failed. 12. The method of claim 11,
Wherein the determining step comprises:
Wherein the time when the refrigerant is supplied to the evaporator is equal to or longer than a reference time and the difference DT between the temperature measured by the defrost sensor and the temperature measured by the high temperature sensor is maintained over the reference time, When the temperature detected by the temperature sensor and the temperature measured by the high-temperature sensor are maintained below the reference temperature, it is determined that the defrosting operation is necessary.
KR1020150026773A 2015-02-25 2015-02-25 Automatic defrosting system, method, and medium having computer program KR20160103857A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102161416B1 (en) * 2020-07-15 2020-09-29 이종훈 Freezing apparatus capable of controlling real-time defrosting
KR102161417B1 (en) * 2020-07-15 2020-09-29 이종훈 Freezing apparatus capable of controlling defrosting based on temperature difference
KR20220143258A (en) * 2021-04-16 2022-10-25 최철호 Operation method of high efficiency storage system
KR102464341B1 (en) * 2022-02-15 2022-11-10 주식회사 로드맵 Automatic defrosting method of delivery vehicle for cold chain
KR20230123756A (en) 2022-02-17 2023-08-24 주식회사 엘에스아이오티 Refrigeration and Air Conditioning Defrosting System and Method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102161416B1 (en) * 2020-07-15 2020-09-29 이종훈 Freezing apparatus capable of controlling real-time defrosting
KR102161417B1 (en) * 2020-07-15 2020-09-29 이종훈 Freezing apparatus capable of controlling defrosting based on temperature difference
KR20220143258A (en) * 2021-04-16 2022-10-25 최철호 Operation method of high efficiency storage system
KR102464341B1 (en) * 2022-02-15 2022-11-10 주식회사 로드맵 Automatic defrosting method of delivery vehicle for cold chain
KR20230123756A (en) 2022-02-17 2023-08-24 주식회사 엘에스아이오티 Refrigeration and Air Conditioning Defrosting System and Method

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