KR102126890B1 - Method of controlling a refrigerator - Google Patents

Abstract

The present invention relates to a control method of a refrigerator. The control method of a refrigerator according to the spirit of the present invention corresponds to a control method of controlling ON/OFF of a cooling fan disposed in a machine room together with a compressor and a condenser. First, it is determined whether the compressor is switched ON/OFF. Then, when the compressor is ON, the frequency of evaporation, which is the temperature of the evaporator, is sensed, and when the detected falling frequency is greater than or equal to the set falling frequency, the cooling fan is turned on. On the other hand, when the compressor is turned off, the frequency at which the evaporation temperature is increased is detected, and when the detected rising frequency is equal to or higher than the set rising frequency, the cooling fan is turned off.

Description

Refrigerator control method {METHOD OF CONTROLLING A REFRIGERATOR}

The present invention relates to a control method of a refrigerator.

Generally, a refrigerator is a household appliance that allows food to be stored at a low temperature in an internal storage room shielded by a door. In detail, the refrigerator is provided with a refrigerator body having a storage compartment formed therein, a door for opening and closing the storage compartment, and a refrigerating cycle device for providing cold air to the storage compartment.

In general, the refrigeration cycle device, a compressor for compressing a refrigerant, a vapor compression type refrigeration cycle device having a condenser in which the refrigerant is radiated and condensed, an expansion device in which the refrigerant is reduced in pressure, and an evaporator in which the refrigerant absorbs latent heat and evaporates. It consists of.

At this time, the evaporator is disposed on one side of the storage chamber, and the compressor and the condenser are disposed in the machine room. In addition, a cooling fan for cooling the compressor and the condenser is provided in the machine room.

Regarding a refrigerator having such a cooling fan, prior document 1 has been filed.

<Prior Art 1>

1. Public number: 19998-054638 (Public date: September 25, 1998)

2. Name of invention: Cooling fan control method of refrigerator

The cooling fan disclosed in the prior document 1 is controlled by the condenser temperature. In detail, when the temperature of the condenser is sensed, the cooling fan is operated when the temperature is higher than the set temperature, and the cooling fan is maintained when the temperature is lower than the set temperature.

At this time, the prior document 1 has the following problems.

(1) In order to control the cooling fan, a separate temperature sensor is required to detect the temperature of the compressor or condenser. Accordingly, there is a problem that additional material cost and installation cost are consumed, and control complexity is increased.

(2) In addition, there is a problem that the cooling fan is controlled according to the external temperature rather than the refrigeration cycle of the actual refrigerator. That is, there is a problem that the cooling fan does not operate effectively.

The present invention has been proposed to solve this problem, and an object of the present invention is to provide a control method of a refrigerator that controls a cooling fan using an evaporation temperature sensor provided in an evaporator.

In addition, an object of the present invention is to provide a control method of a refrigerator that effectively operates a cooling fan through an operation state of a compressor and a temperature of an evaporator.

The control method of a refrigerator according to the spirit of the present invention is disposed in a machine room together with a compressor and a condenser, and in the control method of the refrigerator controlling ON/OFF of a cooling fan for cooling the compressor and the condenser, the compressor and the When the compressor is turned on while the cooling fan is turned off, the cooling fan maintains the off state, detects the frequency at which the evaporator temperature of the evaporator falls, and when the detected falling frequency is greater than or equal to the set falling frequency, the cooling fan Is switched to the ON state, and when the compressor is turned off while the compressor and the cooling fan are turned on, the cooling fan maintains the ON state, detects the frequency at which the evaporation temperature is increased, and detects the rising frequency. When is equal to or higher than the set rising frequency, the cooling fan may be switched to the OFF state.

At this time, the evaporation temperature may be measured by an evaporation temperature sensor that measures the temperature of the evaporator in unit time intervals.

In addition, the detected falling frequency and the detected rising frequency may be calculated by the number of times the evaporation temperature is continuously lowered and raised by the evaporation temperature sensor.

According to the control method of the refrigerator according to an embodiment of the present invention having the above configuration, it has the following effects.

As the cooling fan is operated using the evaporation temperature sensor installed in the evaporator, there is an advantage that there is no need to provide a separate temperature sensor.

In addition, according to the falling frequency and the rising frequency of the evaporator temperature measured by the evaporation temperature sensor, there is an advantage that the cooling fan can be turned ON/OFF effectively.

In particular, it has the advantage of being able to operate and stop the cooling fan at a more accurate and appropriate time as it is measured except for temporary temperature changes due to ON/OFF of the compressor.

1 is a view showing the configuration of a refrigerator according to an embodiment of the present invention.
2 is a view showing a machine room of a refrigerator according to an embodiment of the present invention.
3 is a view showing a control configuration of a refrigerator according to an embodiment of the present invention.
4 is a view showing a cooling fan control of a refrigerator according to an embodiment of the present invention.
5 and 6 are views exemplarily showing the evaporation temperature of a refrigerator according to an embodiment of the present invention over time.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. It should be noted that in adding reference numerals to the components of each drawing, the same components have the same reference numerals as possible even though they are displayed on different drawings. In addition, in describing embodiments of the present invention, when it is determined that detailed descriptions of related well-known configurations or functions interfere with understanding of the embodiments of the present invention, detailed descriptions thereof will be omitted.

In addition, in describing the components of the embodiments of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only for distinguishing the component from other components, and the nature, order, or order of the component is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, the component may be directly connected to or connected to the other component, but another component between each component It should be understood that may be "connected", "coupled" or "connected".

1 is a view showing the configuration of a refrigerator according to an embodiment of the present invention.

As shown in FIG. 1, the refrigerator 1 according to the spirit of the present invention includes a refrigerator body 10 and at least one refrigerator door 20 forming an exterior.

At least one storage compartment (11, 12) is provided inside the refrigerator body (10). The storage compartment includes a freezer compartment 11 and a refrigerating compartment 12. The freezer compartment 11 and the refrigerator compartment 12 may be separated from each other by a partition wall 13.

In FIG. 1, the freezing chamber 11 and the refrigerating chamber 12 are illustrated one by one, but this is exemplary, and the freezing chamber 11 and the refrigerating chamber 12 may be provided in plural. In addition, although the freezing chamber 11 is illustrated as being disposed above the refrigerating chamber 12, this is exemplary, and the freezing chamber 11 is disposed below or the freezing chamber 11 and the refrigerating chamber 12 are side by side. Can be placed.

In other words, FIG. 1 shows a top mount type refrigerator in which the freezer compartment 11 is disposed above the refrigerator compartment 12, but the present invention is not limited thereto. That is, the present invention also includes a refrigerator of a side by side type in which a refrigerating compartment and a freezer are arranged to the left and right, a refrigerator of a bottom freezer type in which a refrigerating compartment is provided at the top and a freezer is provided at the bottom. Can be applied.

The refrigerator door 20 may be rotatably hinged to the front of the refrigerator body 10 to open and close the storage compartments 11 and 12. For example, since the user uses the refrigerator 10 in front of the refrigerator 10, the refrigerator door 20 may be provided on the front of the refrigerator body 10 to be rotatable forward. .

In addition, the refrigerator door 20 may be provided with a door that opens and closes the freezer compartment 11 and a door that opens and closes the refrigerator compartment 12. In addition, the refrigerator door 20 may be provided in various forms such as a drawer-type door that opens and closes the freezer compartment by a sliding method.

In addition, the refrigerator 1 according to the spirit of the present invention includes a compressor 30, a condenser 40 (FIG. 2) and an evaporator 50 forming one refrigeration cycle. The compressor 30 and the condenser 40 may be disposed in a machine room 15 provided on one side of the refrigerator body 10. This will be described later in detail.

The evaporator 50 may be disposed on one side of the storage chamber. In detail, the evaporator 50 may be disposed at the rear of the freezer 11. This is exemplary, and the evaporator 50 may be disposed in the refrigerating chamber 12 or in the freezing chamber 11 and the refrigerating chamber 12, respectively.

In addition, a shroud member 51 forming an air passage is installed in a rear region of the freezing chamber 11 in which the evaporator 50 is installed. In detail, the shroud member 51 is spaced a predetermined distance from the inner wall of the refrigerator body 10 to form the air passage.

In addition, a freezer compartment grill member 52 having a plurality of openings is spaced apart from one side of the shroud member 51. In addition, the refrigerating compartment 12 is provided with a refrigerating compartment grill member 53 spaced a predetermined distance from the inner wall of the refrigerator main body 10. A plurality of openings are also formed in the refrigerator compartment grill member 53.

In addition, the partition wall 13 is provided with a freezer return path 13a formed to return air in the freezer compartment 11 and a freezer return path 13b formed to return air in the refrigeration chamber 12. do. The freezer compartment return flow passage 13a and the refrigerator compartment return passage 13b may be formed on one side and the other side of the partition wall 13 to communicate with the freezer compartment 11 and the refrigerator compartment 12, respectively.

In addition, a storage room fan 54 is installed on one side of the evaporator 50. In detail, the storage room fan 54 may be disposed together with the evaporator 50 between the refrigerator body 10 and the shroud member 52. Air that has passed through the evaporator 50 may flow into the freezer compartment 11 or the refrigerator compartment 12 according to the operation of the storage compartment fan 54.

In detail, when the storage chamber fan 54 is rotated, air inside the freezing chamber 11 or the refrigerating chamber 12 flows into the lower portion of the evaporator 50 through each return passage 13a, 13b. Then, the air flowing into the lower portion of the evaporator 50 is cooled while passing through the evaporator 50, and the cooled air is provided to the inside of the freezing chamber 11 or the refrigerating chamber 12 again.

In the rear lower region of the refrigerator body 10, a machine room 15 is formed. A compressor 30 for compressing the refrigerant delivered from the evaporator 50 is provided inside the machine room 15. Hereinafter, the configuration installed in the machine room 15 will be described in detail.

2 is a view showing a machine room of a refrigerator according to an embodiment of the present invention. 2 shows a rear lower region of the refrigerator 1 to show the machine room.

2, the machine room 15 is a space for accommodating the compressor 13 and the condenser 40, and is formed in a corner space formed by the lower surface and the rear surface of the refrigerator body 10. do. However, the location of the machine room 15 may vary depending on the embodiment.

In addition, a plurality of perforations are formed on the lower surface of the machine room 15 to allow air to flow in and out of the machine room 15. The rear surface of the machine room 15 is formed to be open for installation of the compressor 13 and the condenser 40 and the like. In addition, the open rear surface of the machine room 15 is shielded by a machine room cover 16 with a number of perforations for the flow of air.

The compressor 30 is mounted on one inner side of the machine room 15. For example, the compressor 30 may be mounted on the inner left side of the machine room 15. The compressor 30 is a module for compressing refrigerant in a high temperature and high pressure state, and may be fixedly mounted on a lower surface of the machine room 15 by coupling means such as screws.

In addition, the condenser 40 is mounted on the other inner side of the machine room 15. For example, the condenser 40 may be mounted on the inner right side of the machine room 15. The condenser 40 is a module for converting a high-temperature, high-pressure refrigerant transferred from the compressor 30 into a medium-temperature, high-pressure liquid refrigerant, and is disposed in the machine room 15.

In particular, the condenser 40 may be mounted on top of the defrost water tray 41. It is understood that the defrosting water tray 41 is configured to collect defrosting water generated by recording frost on the surface of the evaporator by defrosting operation. The defrosting tray 41 is injection molded from plastic to provide a shape in which a number of components can be mounted, and is formed so that corrosion does not occur.

In addition, a cooling fan 60 for cooling the compressor 30 and the condenser 40 is installed in the machine room 15. The cooling fan 60 may be installed between the compressor 30 and the condenser 40 by the cooling fan guide 61. In particular, the cooling fan 60 serves to lower the temperature of the condenser 40 when the high-temperature, high-pressure refrigerant is delivered to the condenser 40 when the compressor 30 is driven.

Hereinafter, the control configuration of the refrigerator including the cooling fan 60 will be described in detail.

3 is a view showing a control configuration of a refrigerator according to an embodiment of the present invention.

As shown in FIG. 3, the refrigerator 1 according to the spirit of the present invention is provided with a control unit 70 for controlling various configurations. The control unit 70 may control operations such as the compressor 30, the cooling fan 60, and the storage room fan 54.

In detail, the control unit 70 may control ON/OFF of the compressor 30 to drive and stop the refrigeration cycle. Further, the cooling fan 60 and the storage fan 54 can be turned on/off.

In addition, the refrigerator 1 may be provided with a power supply unit 71, various input units 72, and various sensors 73 and 74. For example, the power supply unit 71 may be provided as a code for inputting external power in the refrigerator 1. Therefore, the refrigerator 1 may be turned on/off by the power supply unit 71.

The input unit 72 may be provided to have various functions. For example, the input unit 72 may be provided with a button capable of inputting a desired high internal temperature. The user can adjust the temperature of the freezer compartment 11 and the refrigerator compartment 12 through the input unit 72 as necessary.

Further, the input unit 72 may be provided as a mechanical input device, a touch input device, and an external device, and may be provided as a device for inputting a predetermined signal to the control unit 70. As such, the input unit 72 may be provided in various forms, and may be provided in a plurality of numbers.

The sensor includes a high temperature sensor 73, an evaporation temperature sensor 74, and the like. The internal temperature sensor 73 may be installed in the freezing chamber 11 and the refrigerating chamber 12, respectively, to measure the temperature of the freezing chamber 11 and the refrigerating chamber 12.

The evaporation temperature sensor 74 corresponds to a sensor that measures the temperature of the evaporator 50. At this time, the evaporation temperature sensor 74 may be installed to determine whether the evaporator 40 is in defrost operation.

Briefly, frost or the like may be generated on the evaporator 40, and a defrosting operation may be performed to remove it. The control unit 70 determines whether frost or the like is generated in the evaporator 40 through the evaporation temperature measured by the evaporation temperature sensor 74. In addition, frost or the like of the evaporator 40 may be removed through a defrost heater (not shown) provided on one side of the evaporator 40.

In addition, the sensor may include a temperature sensor for measuring different temperatures or various sensors for measuring humidity, odor, cleanliness, and the like.

In addition, the refrigerator 1 is provided with a memory unit 75 in which predetermined information is stored. The control unit 70 uses the information input from the power supply unit 71, the input unit 72 and the sensors 73 and 74, and the information stored in the memory unit 75, so that the compressor 30 and the cooling fan 60 and the storage room fan 54 can be controlled.

Briefly, the control of the compressor 30, the control unit 70 compares the temperature measured by the temperature sensor 73 and the temperature input by the input unit 72. At this time, the control unit 70 compares the temperature measured by the temperature sensor 73 with the temperature input by the input unit 72 within the temperature range stored in the memory unit 75.

Then, when the temperature measured by the in-house temperature sensor 73 does not fall within a predetermined range, the compressor 30 may be turned on. Further, when the temperature measured by the in-house temperature sensor 73 falls within a predetermined range, the compressor 30 may be turned off.

In addition, briefly describing the control of the storage chamber fan 54, the control unit 70 may operate the storage chamber fan 54 simultaneously with the operation of the compressor 30. That is, the ON/OFF of the compressor 30 and the ON/OFF of the storage chamber fan 54 may be operated in the same way.

In addition, the control unit 70 may increase the strength of the storage compartment fan 54 to effectively lower the temperature of the freezer compartment 11 or the refrigerator compartment 12. That is, the control unit 70 may control the flow rate of air flowing through the freezing chamber 11 or the refrigerating chamber 12 by adjusting the RPM of the motor driving the storage chamber fan 54.

Hereinafter, the control of the cooling fan 60 will be described in detail based on such a control configuration.

4 is a view showing a cooling fan control of the refrigerator according to an embodiment of the present invention. In FIG. 4, in order to describe the ON/OFF control of the cooling fan 60 in detail, portions for other controls are omitted and illustrated.

4, in order to control the cooling fan 60, first, it is determined whether the compressor 30 is switched ON/OFF (S10).

At this time, the ON/OFF switching of the compressor 30 includes a case where the compressor 30 is switched from OFF to ON. That is, it means a time point at which the compressor 30 starts to operate. In addition, the ON/OFF switching of the compressor 30 includes a case where the compressor 30 is switched from the ON state to the OFF state. That is, it means a time point at which the compressor 30 is terminated.

It is understood that the ON/OFF switching of the compressor 30 is performed by the control unit 70. Therefore, the control unit 70 can know whether the compressor 30 is switched ON/OFF.

Then, it is determined whether the compressor 30 is ON (S20). In other words, the compressor 30 is switched from the OFF state to the ON state, and it is determined whether the operation has started.

When the compressor 30 is turned on, the falling frequency of the evaporation temperature is detected (S22). At this time, the evaporation temperature means the temperature of the evaporator 50, and means the temperature value sensed by the evaporation temperature sensor 74. In detail, the evaporation temperature sensor 74 senses the temperature of the evaporator 50 at predetermined unit time intervals.

For example, the evaporation temperature sensor 74 may be set to detect the temperature of the evaporator 50 once every 5 seconds. Accordingly, the control unit 50 may obtain information on a change in evaporation temperature over time.

At this time, the drop in the evaporation temperature means that the evaporation temperature is reduced after a unit time. For example, when the evaporation temperature sensor 74 detects an evaporation temperature of 20 degrees below zero, and after 5 seconds, if the evaporation temperature is detected below 20.5 degrees, it is determined that the evaporation temperature has decreased.

In addition, the dropping frequency of the evaporation temperature means the number of times the drop of the evaporation temperature was detected. In particular, the dropping frequency of the evaporation temperature is calculated as the number of times the drop of the evaporation temperature was continuously detected. For example, when the evaporation temperature sensor 74 detects an evaporation temperature of minus 20 degrees Celsius, and after 5 seconds, if the evaporation temperature is sensed by minus 20.5 degrees, the descending frequency is determined to be 1.

In addition, when the evaporation temperature is again lowered to 21 degrees below zero after 5 seconds, the descending frequency is determined to be 2. On the other hand, if the evaporation temperature rises to minus 20 degrees and is detected again after 5 seconds, the descending frequency is determined to be 1.

The detected falling frequency and the set falling frequency are compared (S24). The set falling frequency may be understood as a value stored in advance in the memory unit 75. At this time, the descending frequency is continuously measured until the detected falling frequency is greater than or equal to the set falling frequency.

Then, when the detected falling frequency is greater than or equal to the set falling frequency, the cooling fan 60 is turned on (S26). At this time, the set falling frequency corresponds to a value of 2 or more. That is, it means a plurality of descents.

For example, when the set falling frequency is 2, the cooling fan 60 is maintained in an OFF state until the falling frequency of the evaporation temperature is determined to be 2. Then, when the falling frequency of the evaporation temperature is determined to be 2, the cooling fan 60 is switched to the ON state.

On the other hand, when the compressor 30 is OFF (S30), it detects the rising frequency of the evaporation temperature (S32). In other words, when the compressor 30 is switched from the ON state to the OFF state and terminated, the rising frequency of the evaporation temperature is sensed.

The rising frequency of the evaporation temperature means the number of times the rise of the evaporation temperature was detected. At this time, the increase in the evaporation temperature means that the evaporation temperature is increased after a unit time. For example, when the evaporation temperature sensor 74 detects an evaporation temperature of minus 20 degrees Celsius, and after 5 seconds, if the evaporation temperature is sensed by minus 19.5 degrees, it is determined that the evaporation temperature has increased.

In particular, the rising frequency of the evaporation temperature is calculated as the number of times the increase in the evaporation temperature is continuously detected. For example, when the evaporation temperature sensor 74 detects an evaporation temperature of minus 20 degrees Celsius, and after 5 seconds, if the evaporation temperature is sensed by minus 19.5 degrees, the rising frequency is determined to be 1.

In addition, if the evaporation temperature is detected again after rising again to 19 degrees below zero after 5 seconds, the rising frequency is determined to be 2. On the other hand, if the evaporation temperature is lowered to 20 degrees below zero after 5 seconds, the rising frequency is determined to be 1.

The detected rising frequency and the set rising frequency are compared (S34). The set rising frequency may be understood as a value stored in advance in the memory unit 75. At this time, the rising frequency is continuously measured until the detected rising frequency exceeds the set rising frequency.

Then, when the detected rising frequency is greater than or equal to the set rising frequency, the cooling fan 60 is turned off (S36). At this time, the set rising frequency corresponds to a value of 2 or more. That is, it means a plurality of ascents.

For example, when the set rising frequency is 2, the cooling fan 60 is maintained in the ON state until the rising frequency of the evaporation temperature is determined to be 2. Then, when the rising frequency of the evaporation temperature is determined to be 2, the cooling fan 60 is switched to the OFF state.

At this time, the falling frequency of the evaporation temperature can be understood as a criterion for determining whether the refrigeration cycle is operating normally. In addition, the rising frequency of the evaporation temperature can be understood as a criterion for determining whether the refrigeration cycle is normally ended.

The compressor 30 is turned on and the evaporator 50 takes a predetermined time to evaporate the refrigerant normally. That is, it takes a predetermined time until the compressor 30 is turned on and the condenser 40 needs cooling by the cooling fan 60. In addition, even after the compressor 30 is turned off, cooling by the cooling fan 60 is required in the condenser 40 for a predetermined time.

At this time, the time required may be changed according to the external environment and the internal environment of the refrigerator 1. For example, it may be changed according to a place where the refrigerator 1 is installed, an external temperature, an amount of storage stored in the storage room, and the like. Therefore, it is impossible to predict such a time in advance, and the conventional cooling fan operates simultaneously with ON/OFF of the compressor 30 regardless of the need for actual cooling.

The cooling fan 60 of the refrigerator 1 according to the spirit of the present invention can be effectively operated in consideration of the operation of an actual refrigeration cycle. Hereinafter, control of the cooling fan 60 will be described based on the evaporation temperature of the refrigerator measured by the evaporation temperature sensor 74.

5 is a diagram illustrating an evaporation temperature of a refrigerator according to an embodiment of the present invention over time. Figure 5 shows the evaporation temperature over time, the horizontal axis corresponds to any time indicating the operating time of the refrigerator. The time value shown in FIG. 5 is an arbitrary value and is independent of the features of the invention. In addition, the vertical axis corresponds to the temperature of the evaporator 40 measured by the evaporation temperature sensor 74, that is, the evaporation temperature.

In addition, FIG. 5 is a view showing a case in which the compressor 30 is switched from the OFF state to the ON state. In FIG. 5, the point in time when the compressor 30 is switched from the OFF state to the ON state, that is, the point in time when the compressor 30 starts to operate is denoted by A.

At this time, in order to clearly distinguish ON/OFF of the compressor 30, a constant graph showing right and left sides based on A is shown. In detail, the left side of A in FIG. 5 shows a constant graph along the reference point of the horizontal axis while the compressor 30 is OFF. In addition, the right side of A in FIG. 5 shows a constant graph having a predetermined value while the compressor 30 is ON.

Referring to FIG. 5, the control of FIG. 4, when point A is reached, ON/OFF switching of the compressor 30 is detected (S10 ). Then, the ON state of the compressor 30 is determined (S20), and the falling frequency of the evaporation temperature is detected (S22). Then, when the detected falling frequency is greater than or equal to the set falling frequency, the cooling fan 60 is turned on (S24).

For example, the set falling frequency is 2. The evaporation temperature measured to the right of point A repeats rising and falling. That is, the descent frequency is detected as 1. At this time, it descends once from point a and again from point b. That is, the descent frequency is detected as 2. Accordingly, the cooling fan 60 may be turned on at point b.

As such, the cooling fan 60 may be turned on after a predetermined time after the compressor 30 is turned on. In particular, it can be seen that the evaporation temperature rises even after the compressor 30 is turned on. This means that the refrigeration cycle does not operate normally and that the operation of the cooling fan 60 is unnecessary. Therefore, the cooling fan 60 according to the spirit of the present invention can be operated when the refrigeration cycle is normally operated.

6 is a diagram illustrating an evaporation temperature of a refrigerator according to an embodiment of the present invention over time. FIG. 6 shows the evaporation temperature over time as in FIG. 5.

However, FIG. 6 is a diagram showing a case in which the compressor 30 is switched from an ON state to an OFF state as opposed to FIG. 5. In FIG. 6, a point in time when the compressor 30 is switched from an ON state to an OFF state, that is, a point in time when the compressor 30 is stopped is indicated by B.

At this time, in order to clearly distinguish ON/OFF of the compressor 30, a constant graph for distinguishing right and left sides based on B is illustrated. In detail, the left side of B in FIG. 6 shows a constant graph having a predetermined value while the compressor 30 is turned on. In addition, the right side of B in FIG. 6 shows a constant graph along the reference point of the horizontal axis while the compressor 30 is OFF.

Referring to FIG. 6, when the control of FIG. 4 is described, when the point B is reached, ON/OFF switching of the compressor 30 is detected (S10 ). Then, the OFF state of the compressor 30 is determined (S30), and the rising frequency of the evaporation temperature is detected (S32). Then, when the detected rising frequency is greater than or equal to the set rising frequency, the cooling fan 60 is turned off (S34).

For example, the set ascent frequency is 2. The evaporation temperature measured to the right of point B repeats the rise and fall. That is, the rising frequency is detected as 1. At this time, it rises once at point c and rises again at point d. That is, the rising frequency is detected as 2. Accordingly, the cooling fan 60 may be turned off at point d.

As such, the cooling fan 60 may be turned off after a predetermined period of time after the compressor 30 is turned off. In particular, it can be seen that the evaporation temperature does not rise immediately after the compressor 30 is turned off. This means that the refrigeration cycle is continuously operated and it is necessary to operate the cooling fan 60. Therefore, the cooling fan 60 according to the spirit of the present invention can be operated until the refrigeration cycle is normally ended.

As such, the cooling fan 60 may be turned on/off in consideration of the evaporation temperature measured by the evaporation temperature sensor 74 as well as the on/off of the compressor 30. Accordingly, the cooling fan 60 is turned on/off according to the operation of a substantial refrigeration cycle, and can be effectively operated only when operation is required.

1: refrigerator 10: refrigerator body
20: refrigerator door 30: compressor
40: condenser 50: evaporator
60: cooling fan 70: control unit
74: evaporation temperature sensor

Claims (10)

In a control method of a refrigerator that is disposed in a machine room together with a compressor and a condenser, and controls ON/OFF of a cooling fan for cooling the compressor and the condenser,
When the compressor and the cooling fan are turned off and the compressor is turned on, the cooling fan maintains the off state and detects the frequency at which the evaporator temperature of the evaporator is lowered,
When the detected falling frequency is greater than or equal to the set falling frequency, the cooling fan is switched to the ON state,
When the compressor and the cooling fan are turned on while the compressor is turned off, the cooling fan maintains the ON state and detects the frequency at which the evaporation temperature is increased,
When the detected rising frequency is higher than or equal to the set rising frequency, the control method of the refrigerator for switching the cooling fan to the OFF state. According to claim 1,
The evaporation temperature is a control method of a refrigerator, characterized in that is measured by an evaporation temperature sensor that measures the temperature of the evaporator in unit time intervals. According to claim 2,
The detected falling frequency and the detected rising frequency is a control method of a refrigerator, characterized in that the evaporation temperature is continuously calculated by the evaporation temperature sensor falling and rising. The method of claim 3,
The set falling frequency and the set rising frequency are stored as 2,
When the compressor is turned on and the evaporation temperature is continuously detected by the evaporation temperature sensor twice, the cooling fan is turned on,
When the compressor is turned off, and the evaporation temperature is continuously detected by the evaporation temperature sensor twice, the cooling fan is turned off. The method of claim 4,
The compressor is turned on, and the cooling fan is kept off until the evaporation temperature is continuously detected by the evaporation temperature sensor twice.
The compressor is turned off, the control method of the refrigerator characterized in that the cooling fan is kept on until the evaporation temperature is continuously increased twice by the evaporation temperature sensor. According to claim 1,
The evaporator is installed on one side of the freezer,
A control method of a refrigerator, characterized in that air passing through the evaporator flows into the freezing compartment and a refrigerating compartment divided by a partition wall by the storage compartment fan disposed on one side of the evaporator. The method of claim 6,
The set temperature of the freezer and the refrigerator is input,
A method of controlling a refrigerator, characterized in that the compressor is turned on/off by comparing the temperature of the freezing chamber and the refrigerating chamber measured by the internal temperature sensor and the set temperature. According to claim 1,
A refrigerator body forming an appearance;
A freezer compartment and a refrigerator compartment formed inside the refrigerator body and separated by partitions;
A refrigerator door rotatably coupled to the refrigerator body to open and close the freezer compartment and the refrigerator compartment, respectively;
A shroud member spaced a predetermined distance from the inner wall of the refrigerator body in the freezer to form an air passage;
A freezer compartment grille member spaced apart from the shroud member and having a plurality of openings;
A freezer compartment grill member disposed at a predetermined distance from the inner wall of the refrigerator body in the refrigerator compartment and having a plurality of openings; and
The freezer compartment return flow passage and the refrigerator compartment return flow passage formed in the partition wall are included so that air in the freezer compartment and the refrigerator compartment can be returned.
The evaporator and storage fan are installed between the inner wall of the refrigerator body and the shroud member,
The machine room is a control method of the refrigerator, characterized in that formed in the rear lower portion of the refrigerator body. The method of claim 8,
The cooling fan is disposed between the compressor and the condenser inside the machine room,
The cooling fan, the control method of the refrigerator, characterized in that when the high-temperature, high-pressure refrigerant is delivered to the condenser is driven to cool the condenser. The method of claim 9,
The compressor is turned on/off according to the temperature of the freezer and the refrigerator,
The cooling fan is ON/OFF of the compressor and ON/OFF according to the temperature of the evaporator control method of the refrigerator.

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