A defrosting method of refrigerator

专利摘要:
The present invention relates to a defrosting operation method of a refrigerator. The present invention controls the progress of the defrosting operation while monitoring the temperature detected by the defrosting sensor and the defrosting operation time at the same time in performing the defrosting operation. In particular, in the present invention, if the temperature value detected by the defrost sensor does not reach the reference set value, the defrost operation is controlled according to the elapsed time of the defrost operation. In addition, when the temperature value detected by the defrost sensor reaches the reference set value, the present invention additionally controls the defrosting operation for a predetermined time to solve the local freezing. This control allows the present invention to effectively and completely defrost the evaporator.
公开号:KR20040065682A
申请号:KR1020030002794
申请日:2003-01-15
公开日:2004-07-23
发明作者:정희일
申请人:엘지전자 주식회사；
IPC主号:

专利说明:

A defrosting method of refrigerator
[9] The present invention relates to a refrigerator, and more particularly to a defrosting operation method of the refrigerator for removing the ice of the evaporator.
[10] In the refrigerator, the refrigerant reaches the evaporator via a compressor, a condenser and a capillary tube and evaporates in the evaporator. At this time, the heat in the vicinity of the evaporator is absorbed by the absorption of the vaporization heat due to the evaporation action, the cold air generated in this process is circulated to the freezer compartment and the refrigerating compartment to cool the inside of the refrigerator.
[11] Some of the cold air deprived of heat from the evaporator is circulated to the freezer compartment, and the other part is circulated in the refrigerator compartment to cool the inside of the refrigerator. On the other hand, the hot air during the circulation of the freezer compartment and the refrigerating compartment is returned to the evaporator is repeated heat exchange operation to lose heat.
[12] At this time, the cold air circulating in the freezer compartment and the refrigerating compartment is returned to the evaporator in a state containing moisture in the high temperature, and the moisture contained in the cold air adheres to the evaporator surface in the form of frost when passing through the evaporator of a very low temperature.
[13] When such a state accumulates, a large amount of frost is formed on the surface of the evaporator, thereby reducing the heat exchange performance of the evaporator. Therefore, the defrost heater mounted near the evaporator should be operated at a predetermined time to remove frost. This action is called defrosting operation.
[14] Looking at the defrosting operation method of the refrigerator according to the prior art as follows.
[15] 1 is an operation control flowchart for performing a defrosting operation of a refrigerator according to the prior art.
[16] As shown in the figure, the prior art, power is supplied to the refrigerator and the refrigerant compressed through the compressor reaches the condenser, the evaporator, and evaporates in the evaporator. Cooled air is generated by evaporation in the evaporator, and the cooled cold air is supplied to the freezing compartment and the refrigerating compartment. At this time, by opening and closing the door, hot air having moisture meets low temperature cold air coming out through the evaporator, and freezing occurs in the evaporator. In this way, when cold air, which has passed through the high temperature, flows back into the evaporator, if cold water containing moisture is repeatedly introduced into the evaporator, freezing is formed on the surface of the evaporator.
[17] When the surface of the evaporator is frozen as described above, the defrost heater is driven to perform the defrosting operation (step 100). When defrost heater heat is generated by the drive of the defrost heater, frost generated on the surface of the evaporator starts to be removed.
[18] When the freezing of the surface of the evaporator is started to be resolved by the generated heat of the defrost heater, the temperature detected by the defrost sensor is increased. In this process, when the temperature detected by the defrost sensor rises above a predetermined temperature (step 110), the microcontroller inputting the detection temperature of the defrost sensor controls to stop heating of the defrost heater (step 120).
[19] When the temperature detected by the defrost sensor falls below a predetermined temperature, the microcontroller determines that the evaporator is frozen and starts the defrosting operation again. As described above, the defrosting operation is controlled based on the detection temperature of the defrost sensor.
[20] Meanwhile, after the defrosting operation according to the operation is performed, residual ice may remain on the evaporator surface. That is, conventionally, since the defrosting operation is controlled based on the temperature detected by the defrosting sensor, if defrosting is locally left in the evaporator, the defrosting operation is excessively continued or the defrosting is terminated too early without detecting the defrosting sensor. A problem has occurred.
[21] Due to this problem, the conventional refrigerator is not effective cooling due to the rise in the internal temperature of the refrigerator compartment, resulting in consumer complaints, and the problem of low efficiency of the refrigerator due to the remaining ice of the evaporator in the freezer compartment.
[22] Accordingly, an object of the present invention is to provide a defrosting operation method of a refrigerator controlling the end point of defrosting by control by temperature and time.
[1] 1 is an operation control flowchart for performing a defrosting operation of a refrigerator according to the prior art.
[2] Figure 2 is a control configuration for controlling to perform the defrosting operation of the refrigerator according to the present invention.
[3] 3 is an operation control flowchart for performing a defrosting operation of the refrigerator according to the present invention.
[4] Explanation of symbols on the main parts of the drawings
[5] 200: power supply unit 210: signal input unit
[6] 220: display unit 240: driving unit
[7] 250: Defrost sensor 260: Defrost heater
[8] 230: microcontroller
[23] Defrosting operation method of the refrigerator according to the present invention for achieving the above object, the first step of detecting the temperature through the defrosting sensor during the defrosting operation; A second step of detecting an elapsed time of the defrosting operation; A third step of monitoring whether the temperature detected in the first step reaches a predetermined specific value; A fourth step of completing the defrosting operation after further performing the defrosting operation for a predetermined time when the condition of the third step is satisfied; A fifth step of determining whether the time detected in the second step reaches a predetermined maximum defrosting operation time when the condition of the third step is not satisfied; If the condition of the fifth step is satisfied, it comprises a sixth step of terminating the defrost.
[24] Looking in detail with respect to the defrosting operation method of the refrigerator according to the present invention.
[25] Figure 2 is a control configuration for controlling to perform the defrosting operation of the refrigerator according to the present invention, Figure 3 is an operation control flow diagram for performing a defrosting operation of the refrigerator according to the present invention.
[26] As shown in the drawing, the present invention includes a power supply unit 200 for supplying power to a product, a signal input unit 210 for inputting an operation signal, a display unit 220 for displaying an operation state of a refrigerator, The defrost heater 240 detects the defrost temperature, the defrost heater 250 outputting the defrost heater heat to the evaporator for defrosting, and the defrost heater 250 is driven according to the detected temperature value through the defrost sensor 240. It is configured to include a microcontroller 230 to control so as to control, so that the cold air is supplied to the interior.
[27] The microcontroller 230 determines whether the defrosting operation is in progress according to the temperature value detected by the defrost sensor 240. In addition, a reference time for performing defrosting operation is set. Accordingly, when the reference time is exceeded, the defrosting operation is controlled to stop.
[28] Looking at the process of the defrosting operation is performed as described above.
[29] Power is supplied to the refrigerator and the refrigerant compressed by the compressor reaches the condenser and the evaporator and evaporates in the evaporator. Cooled air is generated through evaporation in the evaporator, and the cooled cold air is supplied to the freezing compartment and the refrigerating compartment. As a result, the internal temperature of the freezer compartment and the refrigerating compartment is maintained at an appropriate level.
[30] At this time, the hot air having moisture due to the opening and closing of the door meets the cold air coming out through the evaporator, and freezing occurs in the evaporator. In this way, when cold air, which has passed through the high temperature, flows back into the evaporator, if cold water containing moisture is repeatedly introduced into the evaporator, freezing is formed on the surface of the evaporator.
[31] When frost is generated as described above, the defrost heater is driven under the control of the microcontroller 230 (step 300). As the defrosting operation is performed in step 300, the microcontroller 230 counts the defrosting operation time. When the heater heat is generated by driving the defrost heater 260, frost generated on the surface of the evaporator is removed.
[32] While the defrost heater 260 is in operation, the defrost sensor 250 detects a temperature and transmits the sensed temperature value to the microcontroller 230. When the temperature value detected by the defrost sensor 240 reaches a predetermined temperature (step 310), the microcontroller 230 determines that the defrosting operation is performed to some extent. However, after the heating of the defrost heater is additionally heated for a predetermined time (step 320), the heating of the defrost heater 250 is stopped in order to completely remove the local freezing which may be formed on the surface of the evaporator. In operation 330, the control is performed to make a control.
[33] Meanwhile, when the temperature detected by the defrost sensor 240 does not rise to a predetermined value while the defrosting operation is performed in step 310, the microcontroller 230 counts the defrosted to date. It is determined whether the operation time reaches the maximum defrosting operation time (about 40 minutes) that is set (step 325).
[34] According to the determination of step 325, when the maximum defrosting operation time of the defrosting operation set by the user is reached, even when the detection temperature of the defrosting sensor 250 does not reach a predetermined value, the ice is completely removed. It is determined that sufficient defrosting operation has been performed, and the defrosting operation is stopped (step 330).
[35] However, when the detection temperature of the defrost sensor 250 according to step 310 does not reach a preset value and does not reach the maximum defrosting operation time set in step 325, steps 310 and 320 are performed. The defrosting operation is continued while repeating the step 325.
[36] As described above, the present invention is characterized in that the defrosting operation is performed while comparing the temperature detected through the defrosting sensor with the defrosting operation time. In particular, additional heating is performed for a predetermined time even when a predetermined temperature is detected through the defrosting sensor in order to solve the local freezing. In addition, even if the predetermined temperature is not detected by the defrost sensor, the frost formed in the evaporator is thawed by controlling to terminate the defrosting operation when the preset maximum defrosting operation time is reached.
[37] In the embodiment of the present invention, an example of the defrosting operation using the defrost heater is described as an embodiment, but the present invention is not limited thereto, and when defrosting control is performed by a heating cycle that controls the refrigerating cycle in reverse. The present invention can also be applied.
[38] As described above, in the present invention, in order to completely perform defrosting in performing the defrosting operation, in addition to detecting the defrost temperature, it is a basic technical idea to separately control the defrosting time.
[39] The rights of the present invention are not limited to the embodiments described above, but are defined by the claims, and those skilled in the art can make various modifications and adaptations within the scope of the claims. It is self-evident.
[40] Therefore, the following effects can be expected due to the defrosting operation method of the refrigerator according to the present invention.
[41] According to the present invention, the defrosting operation is controlled by the heating time control process together with the detection temperature, so that freezing generated in the evaporator can be completely eliminated. Therefore, the present invention can be expected to prevent the increase in the internal temperature and the decrease in efficiency due to the remaining ice and freezing frost formed on the surface of the evaporator.

权利要求:
Claims (1)
[1" claim-type="Currently amended] During a defrosting operation, a first step of detecting a temperature through a defrost sensor;
A second step of detecting an elapsed time of the defrosting operation;
A third step of monitoring whether the temperature detected in the first step reaches a predetermined specific value;
A fourth step of completing the defrosting operation after further performing the defrosting operation for a predetermined time when the condition of the third step is satisfied;
A fifth step of determining whether the time detected in the second step reaches a predetermined maximum defrosting operation time when the condition of the third step is not satisfied;
And a sixth step of terminating the defrost when the condition of the fifth step is satisfied.

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同族专利:

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公开号 | 公开日

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KR100905087B1|2009-06-30|

引用文献:

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公开号 | 申请日 | 公开日 | 申请人 | 专利标题

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法律状态:
2003-01-15|Application filed by 엘지전자 주식회사

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2003-01-15|Priority to KR1020030002794A

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2004-07-23|Publication of KR20040065682A

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2009-06-30|Application granted

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2009-06-30|Publication of KR100905087B1

优先权:

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申请号 | 申请日 | 专利标题

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KR1020030002794A|KR100905087B1|2003-01-15|2003-01-15|A defrosting method of refrigerator|