KR102629604B1 - Refrigerator and method for controlling the same - Google Patents

Abstract

The control method of the refrigerator of the present invention includes the steps of detecting the temperature of the storage compartment, and operating the cold air supply means with a cooling output when the detected temperature of the storage compartment is higher than the first reference temperature, and operating the cold air supply means with a cooling output. During operation, if the detected temperature of the storage compartment is below a second reference temperature lower than the first reference temperature, operating the cold air supply means with a delay output that is lower than the cooling output; And while the cold air supply means is operating as a delay output, the control unit determines the cooling output or the delay output of the cold air supply means according to the temperature of the storage compartment, and the cold air supply means is used as the determined cooling output or delay output. It includes the step of activating the supply means.

Description

Refrigerator and method for controlling the same {Refrigerator and method for controlling the same}

The present invention relates to a refrigerator and its control method.

A refrigerator is a home appliance that stores food at low temperatures, and it is essential to ensure that the storage room is always maintained at a constant low temperature. Currently, in the case of home refrigerators, the storage room is maintained at a temperature within the upper and lower limit ranges based on the set temperature. That is, the refrigerator is controlled by driving the refrigeration cycle to cool the storage compartment when the storage compartment temperature rises to the upper limit temperature, and stopping the refrigeration cycle when the storage compartment temperature reaches the lower limit temperature.

Korean Patent Publication No. 1997-0022182 (published on May 28, 1997) discloses a constant temperature control method for maintaining the storage compartment of a refrigerator at a constant temperature.

According to prior literature, when the storage room temperature is higher than the set temperature, the compressor and fan are driven, and at the same time, the storage room damper is completely opened. When the storage room temperature cools to the set temperature, the operation of the compressor and/or fan is stopped and the storage room damper is simultaneously operated. It is characterized by closing.

According to the refrigerator control method according to the prior art as described above, there are the following problems.

First, the process of starting the compressor when the refrigerator's storage compartment temperature rises above the set temperature and then stopping the compressor when the storage compartment temperature cools below the set temperature is repeated. Therefore, power consumption increases when the compressor is restarted. There is a downside to this.

In addition, there is a disadvantage that a lot of cooling power is required at the beginning of the compressor operation, which increases power consumption due to compressor operation.

Second, because the damper is fully opened to cool the storage compartment, there is a high possibility that cold air will be excessively supplied to the storage compartment when the damper is fully open, which may cause a problem of overcooling the storage compartment. In other words, there is a disadvantage that it is difficult to maintain a constant temperature in the storage room.

Third, in a structure in which a damper is installed on the partition wall dividing the freezer and the refrigerator compartment, and the damper is fully opened to cool the refrigerator compartment, and the cold air from the freezer is supplied to the refrigerator compartment, the refrigerator compartment is overcooled due to excessive supply of cold air, while the load on the freezer compartment rapidly increases. Problems may arise.

The purpose of the present invention is to provide a refrigerator and a control method thereof that are controlled to reduce the possibility that the temperature of the storage room deviates from the constant temperature state in order to improve the freshness of stored items.

The purpose of the present invention is to provide a refrigerator and a control method thereof that can quickly return to a constant temperature state when the temperature of the storage room deviates from the constant temperature state in order to improve the freshness of stored items.

Additionally, an object of the present invention is to provide a refrigerator and a control method thereof that can reduce power consumption of cold air supply means while maintaining the temperature of the storage compartment at a constant temperature.

The control method of the refrigerator of the present invention to solve the above problem includes the steps of detecting the temperature of the storage compartment, and operating the cold air supply means as a cooling output when the detected temperature of the storage compartment is higher than the first reference temperature; While the cold air supply means is operating with a cooling output, if the detected temperature of the storage compartment is lower than the second reference temperature lower than the first reference temperature, the cold air supply means is operated with a delay output that is lower than the cooling output. ; And while the cold air supply means is operating as a delay output, the control unit determines the cooling output or the delay output of the cold air supply means according to the temperature of the storage compartment, and the cold air supply means is used as the determined cooling output or delay output. It includes the step of activating the supply means.

In the present invention, while the cold air supply means is operating as a delay output, when the temperature of the storage compartment rises to a predetermined temperature higher than the second reference temperature, the control unit controls the cooling output of the cold air supply means (as previously described). The sum of the cooling output and the delay output determined in ) is determined by the value of x α, and the cold air supply means can be operated with the determined cooling output. At this time, α has a value greater than 0 and less than 1.

In the present invention, the control unit determines the cooling output of the cold air supply means to be greater than the previously determined delay output and less than or equal to the cooling output of the previous step, and operates the cold air supply means with the determined cooling output. It can work.

The refrigerator control method of the present invention detects the storage room temperature while the cold air supply means is operating with a delay output, and when it is determined that the storage room temperature is falling, the delay output is reduced or the cold air supply means is operated. A stopping step may be further included.

The refrigerator control method of the present invention further includes the step of detecting the temperature of the storage compartment while the cold air supply means is operating at cooling output, and increasing the cooling output when it is determined that the temperature of the storage compartment is rising. It can be included.

While the cold air supply means is operating with the determined cooling output, when the detected temperature of the storage compartment reaches the second reference temperature, the control unit determines a delay output for delaying the temperature increase and uses the determined delay output to supply the cold air. Supply means can be activated.

The predetermined temperature may be the first reference temperature or an average temperature of the first reference temperature and the second reference temperature.

Alternatively, the predetermined temperature may be a temperature between the first reference temperature and the second reference temperature and may be the target temperature of the storage compartment.

While the temperature of the storage compartment rises to a predetermined temperature and the cooling supply means is operated with the determined cooling output, when the detected temperature of the storage compartment reaches the first reference temperature, the controller controls the current temperature of the cold air supply means. The cooling output can be increased.

The increased cooling output may be any one of the previously determined cooling outputs.

The increased cooling power may be an average of the previously determined cooling power.

While the cold air supply means is operating with the increased cooled output, when the temperature of the storage compartment reaches a predetermined temperature, the control unit determines the cooling output or the delay output, and the determined cooling output or delay output. The cold air supply means can be operated.

After the detected temperature of the storage compartment reaches the second reference temperature, while the cold air supply means is operating with the determined delay output, if the temperature of the storage compartment falls below the second reference temperature, the control unit supplies the cold air. The means can be stopped.

Alternatively, after the detected temperature of the storage compartment reaches the second reference temperature, if the temperature of the storage compartment falls below the second reference temperature while the cold air supply means is operating with the determined delay output, the controller The cold air supply means can be operated at minimum output.

While the cold air supply means is operating with the cooling output, the cooling output may be varied one or more times until the temperature of the storage compartment reaches the second reference temperature.

While the cold air supply means is operating with the cooling output, if the temperature of the storage compartment reaches a predetermined temperature higher than the second reference temperature, the cooling output may be reduced.

The predetermined temperature may be an average temperature of the first reference temperature and the second reference temperature.

Alternatively, the predetermined temperature may be a temperature between the first reference temperature and the second reference temperature and may be the target temperature of the storage compartment.

While the temperature of the storage compartment rises to a predetermined temperature higher than the second reference temperature and the cold air supply means operates at the determined cooling output, when the detected temperature of the storage compartment reaches the second reference temperature, the control unit The delay output of the cold air supply means may be determined as a value of (the sum of the cooling output and the previously determined delay output) x β, and the cold air supply means may be operated with the determined delay output. At this time, β has a value greater than 0 and less than 1.

The control unit determines the delay output of the cold air supply means to be greater than the previously determined cooling output and greater than or equal to the delay output of the previous step, and operates the cold air supply means with the determined delay output. .

The delay output may be a fixed output regardless of temperature.

Alternatively, the delay output may be an output greater than the minimum output of the cold air supply means.

The cooling output of the cold air supply means at the beginning of operation of the refrigerator may be the maximum output of the cold air supply means.

While the cold air supply means is operating with a delay output, when the temperature of the storage compartment reaches the first reference temperature, the control unit may operate the cold air supply means with a previously determined cooling output.

While the cold air supply means is operating at the previously determined cooling output, when the detected temperature of the storage compartment reaches the second reference temperature, the control unit adjusts the delay output of the cold air supply means (cooling output and The sum of previously determined delay outputs) is determined as the value x β, and the cold air supply means can be operated with the determined delay output. At this time, β may be greater than 0 and less than 1.

The cooling output may be a fixed output.

The cold air supply means may include one or more of a compressor that compresses refrigerant and a fan motor that rotates a fan for circulating cold air in the storage compartment.

The storage compartment includes a freezing compartment and a refrigerating compartment, and the cold air supply means may include a damper that controls cold air from the freezing compartment to flow into the refrigerating compartment.

A method of controlling a refrigerator according to another aspect includes detecting the temperature of a storage compartment; If the detected temperature of the storage room is higher than the first reference temperature, operating the compressor with an initial cooling output; While the compressor is operating at the initial cooling output, if the detected temperature of the storage compartment is below the second reference temperature lower than the first reference temperature, operating the compressor at the delayed output lower than the initial cooling output. ; And while the compressor is operating at the delay output, the control unit determines the cooling output or delay output of the compressor according to the temperature of the storage compartment, and operating the compressor at the determined cooling output or delay output. Including, the control unit continuously operates the compressor so that the temperature of the storage compartment is maintained within the first and second reference temperature ranges.

A method of controlling a refrigerator according to another aspect includes detecting the temperature of a storage compartment; When the detected temperature of the storage compartment is higher than the first reference temperature, operating a fan motor for circulating cold air in the storage compartment with an initial cooling output; While the fan motor is operating at the initial cooling output, if the detected temperature of the storage room is below the second reference temperature lower than the first reference temperature, the fan motor is operated at the delay output which is lower than the initial cooling output. stage of becoming; And while the fan motor is operated with a delay output, the control unit determines the cooling output or delay output of the fan motor according to the temperature of the storage compartment, and operates the fan motor with the determined cooling output or delay output. and operating the fan motor, wherein the control unit continuously operates the fan motor so that the temperature of the storage compartment is maintained within the first and second reference temperature ranges.

A method of controlling a refrigerator according to another aspect includes detecting the temperature of a refrigerator compartment; When the temperature of the refrigerating compartment is higher than the first reference temperature, opening the damper to an opening angle for cooling to allow cold air from the freezer to flow into the refrigerating compartment; After the damper is opened at the cooling angle, if the detected temperature of the refrigerating compartment is below the second reference temperature lower than the first reference temperature, the opening angle of the damper is reduced to a delay angle smaller than the cooling angle. step; After the opening angle of the damper is reduced, the control unit determines the opening angle of the damper according to the temperature of the refrigerating compartment, and the determined opening angle causes the damper to be opened, wherein the control unit determines the opening angle of the damper when the temperature of the refrigerating compartment is reduced. The damper is maintained in an open state while the compressor is operated to maintain within the first and second reference temperature ranges.

A refrigerator according to another aspect includes a cabinet having a storage compartment; a compressor operating to cool the storage compartment; A fan for circulation of cold air in the storage compartment; a fan motor for rotating the fan; and a control unit that controls the fan and fan motor.

The control unit adjusts the temperature of the storage compartment within a range between a first reference temperature that is higher than the target temperature of the storage compartment and a second reference temperature that is lower than the target temperature while one or more of the compressor and the fan motor are continuously operated. Adjust the output of one or more of the compressor and the fan motor to maintain power.

When the temperature of the storage compartment reaches the second reference temperature while the compressor is operating, the control unit controls the compressor to operate with a delay output higher than the minimum output.

When the temperature of the storage compartment reaches a predetermined temperature while the compressor is operating at an output higher than the minimum output, the control unit adjusts the initial cooling output of the compressor or a cooling output lower than the initial cooling output. Operate the compressor.

A refrigerator according to another aspect includes a cabinet having a freezer compartment and a refrigerator compartment; a compressor operating to cool the freezer; a fan for circulating cold air in the freezer; a damper located on a flow path that guides cold air from the freezer compartment to the refrigerator compartment; and a control unit that controls the opening angle of the damper.

The control unit operates the compressor and opens the damper to maintain the temperature of the refrigerating compartment within a range between a first reference temperature that is higher than the target temperature of the refrigerating compartment and a second reference temperature that is lower than the target temperature. Adjust the opening angle.

When the temperature of the refrigerating compartment reaches the second reference temperature during the operation of the compressor, the control unit controls the opening angle of the damper so that the opening angle of the damper is greater than the minimum angle greater than 0. do.

When the temperature of the refrigerating compartment reaches a predetermined temperature while the opening angle of the damper is greater than the minimum angle, the control unit opens the damper to the maximum angle or a cooling angle smaller than the maximum angle. Control the opening angle of the damper as much as possible.

According to the proposed invention, the temperature of the storage room can be maintained at a constant level, which has the advantage of extending the storage period of food. In other words, there is an advantage that the phenomenon of supercooling or wilting of food stored in the storage room can be eliminated.

In addition, in order to keep the temperature of the storage room constant, the compressor does not stop but remains in operation, but operates at a lower output than the cooling output during initial startup, which has the effect of reducing the power consumption required to drive the compressor. there is.

In other words, continuous operation without stopping the compressor has the effect of reducing power consumption compared to intermittent operation in which the compressor is repeatedly driven and stopped.

Additionally, there is an advantage that noise caused by repeated on-off operation of the compressor can be reduced.

1 is a diagram schematically showing the configuration of a refrigerator according to a first embodiment of the present invention.
2 to 4 are flowcharts showing a method of controlling a refrigerator according to a first embodiment of the present invention.
5 and 6 are graphs showing changes in the temperature of the storage compartment and changes in the output of the cold air supply means according to the refrigerator control method according to the first embodiment.
7 and 8 are graphs showing changes in the temperature of the storage compartment and the output of the cold air supply means according to the refrigerator control method according to the second embodiment of the present invention.
9 to 11 are graphs showing changes in the temperature of the storage compartment and changes in the output of the cold air supply means according to the control method of the refrigerator according to the third embodiment of the present invention.
Figure 12 is a graph showing the temperature change in the storage compartment and the output change of the cold air supply means according to the refrigerator control method according to the fourth embodiment of the present invention.
Figure 13 is a graph showing the temperature change in the storage compartment and the output change of the cold air supply means according to the refrigerator control method according to the fifth embodiment.
Figure 14 is a graph showing the temperature change in the storage compartment and the output change of the cold air supply means according to the refrigerator control method according to the sixth embodiment.
Figure 15 is a diagram schematically showing a refrigerator according to a seventh embodiment of the present invention.
Figure 16 is a diagram schematically showing a refrigerator according to an eighth embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail through illustrative drawings. When adding reference numerals to components in each drawing, it should be noted that identical components are given the same reference numerals as much as possible even if they are shown in different drawings. Additionally, when describing embodiments of the present invention, if detailed descriptions of related known configurations or functions are judged to impede understanding of the embodiments of the present invention, the detailed descriptions will be omitted.

Additionally, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, sequence, 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, that component may be directly connected or connected to that other component, but there is no need for another component between each component. It should be understood that may be “connected,” “combined,” or “connected.”

1 is a diagram schematically showing the configuration of a refrigerator according to a first embodiment of the present invention.

Referring to FIG. 1, the refrigerator 1 according to the first embodiment of the present invention includes a cabinet 11 in which a freezing chamber 111 and a refrigerating chamber 112 are formed, and is coupled to the cabinet 11 to It may include doors (not shown) that open and close the freezer compartment 111 and the refrigerator compartment 112, respectively.

In detail, objects to be stored, such as food, may be stored in the freezer compartment 111 and the refrigerator compartment 112.

The freezing compartment 111 and the refrigerating compartment 112 may be partitioned left and right or up and down inside the cabinet 11 by a partition wall 113. Additionally, a cold air hole may be formed in the partition wall 113, and a damper 12 may be installed in the cold air hole to open or close the cold air hole.

Additionally, the refrigerator 1 includes a refrigeration cycle 20 for cooling the freezer compartment 111 and/or the refrigerator compartment 112.

In detail, the refrigeration cycle 20 includes a compressor 21 that compresses the refrigerant into a high-temperature, high-pressure gaseous refrigerant, and a condenser 22 that condenses the refrigerant passing through the compressor 21 into a high-temperature, high-pressure liquid refrigerant, An expansion member 23 that expands the refrigerant that has passed through the condenser 22 into a low-temperature, low-pressure two-phase refrigerant, and an evaporator 24 that evaporates the refrigerant that has passed through the expansion member 23 into a low-temperature, low-pressure gaseous refrigerant. Includes. Additionally, the evaporator 24 may include an evaporator for a freezer.

In addition, the refrigerator 1 includes a fan 26 that causes air to flow toward the evaporator 24 to circulate cold air in the freezer compartment 111, and a fan motor 25 that drives the fan 26. It can be included.

In the present invention, in order to supply cold air to the freezer compartment 111, the compressor 21 and the fan motor 25 must operate, and in order to supply cold air to the refrigerator compartment 112, the compressor 21 and the fan motor 25 must operate. In addition to operating, the damper 12 must be opened. At this time, the damper 12 operates by the damper motor 13.

The compressor 21, fan motor 25, and damper 12 may be referred to as “cold air supply means” that operate only to supply cold air to the storage compartment.

In this specification, adjusting the output of the cold air supply means includes adjusting the output of one or more of the compressor 21 and the fan motor 25 and adjusting the opening angle of the damper 12 (which is the state of the damper). it means.

The refrigerator 1 includes a freezer compartment temperature sensor 41 that detects the temperature of the freezer compartment 111, a refrigerator compartment temperature sensor 42 that detects the temperature of the refrigerator compartment 112, and each of the temperature sensors 41 and 42. It may include a control unit 50 that controls the cold air supply means based on the temperature.

The control unit 50 may control one or more of the compressor 21 and the fan motor 25 to maintain the temperature of the freezer 111 at the target temperature.

For example, the control unit 50 may control the output of the compressor 21 while the fan motor 25 operates at a constant speed.

Alternatively, the control unit 50 may control the output (rotation speed) of the fan motor 25 while the compressor 21 operates at a constant output.

The control unit 50 may control the output of one or more of the compressor 21, the fan motor 25, and the damper motor 13 to maintain the temperature of the refrigerating compartment 112 at the target temperature.

For example, the control unit 50 may adjust the opening angle of the damper 12 while the compressor 21 and the fan motor 25 operate at a constant output.

In this specification, the output of the cold air supply means “determined” by the control unit 50 is a concept that includes both a preset constant value or a variable value determined by a preset calculation method.

Hereinafter, the refrigerator control method according to the first embodiment of the present invention will be described in detail.

In this specification, the set temperature range of the storage compartment refers to the range between a first reference temperature higher than the target temperature and a second reference temperature lower than the target temperature, and is controlled to maintain the temperature of the storage compartment within the set temperature range. This is called constant temperature control in the storage room.

And, the temperature between the first reference temperature and the second reference temperature may be referred to as the third reference temperature.

At this time, the third reference temperature may be the target temperature of the storage compartment or the average temperature of the first reference temperature and the second reference temperature, but is not limited thereto.

Figures 2 to 4 are flowcharts showing a method of controlling a refrigerator according to the first embodiment of the present invention, and Figures 5 and 6 are flowcharts showing the temperature change of the storage compartment and the cold air supply means according to the control method of the refrigerator according to the first embodiment of the present invention. This is a graph showing the change in output.

Referring to FIGS. 2 to 6, the temperature (T) of the storage compartment is sensed by the temperature sensors 41 and 42 in order to control the constant temperature (S1). The present invention will be described assuming that the refrigerator is in an initial on state.

The control unit 50 determines whether the detected temperature (T) of the storage compartment is greater than or equal to the first reference temperature (S2).

When the refrigerator is initially turned on, the temperature (T) of the storage compartment is close to room temperature, so the detected temperature (T) of the storage compartment will be higher than the first reference temperature.

As a result of the determination in step S2, if it is determined that the temperature (T) of the storage compartment is higher than the first reference temperature, the control unit 50 generates a cooling output (P1) (initial value) of the cold air supply means to lower the temperature of the storage compartment. cooling output) is determined, and the cold air supply means is operated with the determined cooling output (P1) (S3).

In this specification, the cooling output may be controlled stepwise or linearly, and may be controlled by calculating the actual output value or calculated and controlled as a leveled value.

It should be noted that the value of the cooling output described in the drawings of this specification is an exemplary value, a leveled value, and is determined as a natural number for convenience of understanding (if the cooling output calculated by the control unit has a decimal point, it is rounded and the level is decided).

For example, to maintain a constant temperature in the freezer, the control unit 50 may control the compressor 21 to operate at a first reference output and the fan motor 25 to operate at a second reference output.

Additionally, in order to maintain a constant temperature in the refrigerating compartment, the control unit 50 may additionally adjust the output of the damper motor 13 so that the opening angle of the damper 12 becomes the first reference angle.

At this time, the first reference output may be the maximum output of the compressor 21 or an output lower than the maximum output.

Additionally, the second reference output may be the maximum output of the fan motor 25 (the output at which the rotation speed of the fan motor is maximum) or an output lower than the maximum output.

However, the closer each of the first and second reference outputs is to the maximum output, the faster the temperature drop in the storage compartment may be. Additionally, the closer the first reference angle is to the maximum opening angle of the damper 12, the faster the temperature drop in the storage compartment may be.

When the cold air supply means operates as a cooling output (P1), the temperature of the storage compartment will gradually decrease.

The temperature of the storage compartment can be periodically detected by the temperature sensors 41 and 42 (S4).

Then, the control unit 50 determines whether the detected temperature (T1) of the storage compartment is below the second reference temperature (S5).

As a result of the determination in step S5, if it is determined that the detected temperature (T1) of the storage compartment is below the second reference temperature, the control unit 50 increases the temperature of the storage compartment, but sets the cold air supply means to delay the temperature increase. It is controlled to operate as a rising delay output (P2) (hereinafter referred to as “delay output”) (S6).

Compared to the conventional technology in which the cold air supply means is stopped when the second reference temperature is reached, in the case of the present invention, by operating the cold air supply means with the temperature rise delay output, the temperature of the storage compartment is higher than the first reference temperature. By delaying the time to reach and reducing the amount of change in the storage room, the freshness of the stored items can be improved.

In addition, the number of times the cold air supply means is turned on/off can be reduced, thereby improving the reliability of parts of the cold air supply means.

In the present invention, after the detected temperature (T1) of the storage compartment is determined to be below the second reference temperature, the temperature of the storage compartment must be increased in order to control the constant temperature of the storage compartment.

At this time, when the cold air supply means is stopped (including when the damper is closed), the rate of temperature increase in the storage compartment will be the fastest. However, in the present invention, the cold air supply means is not stopped to reduce the power consumption of the cold air supply means, and a delay The output causes the cold air supply means to operate.

It is preferable that the delay output (P2) determined in step S6 is determined to be a smaller value than the cooling output (P1) determined in the previous step, step S3.

Meanwhile, the delay output (P2) may be equal to or greater than the minimum output at which the cold air supply means can operate. Additionally, the delay output (P2) may be at an angle greater than 0, which is the single force angle of the damper.

For example, when the detected temperature (T1) of the storage compartment is below the second reference temperature, the control unit 50 causes one or more of the compressor 21 and the fan motor 25 to operate with an output equal to or higher than the minimum output. can do.

Alternatively, when the detected temperature (T1) of the storage compartment is below the second reference temperature, the control unit 50 sets the opening angle of the damper 12 to an angle greater than 0 degrees, which is the closing angle (this is an angle for delaying temperature rise). The damper motor 13 can be controlled to maintain .

Then, the temperature (T2) of the storage compartment is detected by the temperature sensors (41, 42) (S7).

Then, the control unit 50 determines whether the detected temperature (T2) of the storage compartment has reached the third reference temperature (S8).

As a result of the determination in step S8, if it is determined that the detected temperature (T2) of the storage compartment has reached the third reference temperature, the control unit 50 controls the cooling outputs (P3, P5, and P7) of the cold air supply means. The cooling air supply means is controlled to operate using the determined cooling outputs (P3, P5, and P7) (S9).

When the temperature of the storage compartment rises and reaches the third reference temperature, the cooling output determined in step S9 is determined to be a larger value than the delay output determined in the previous step, step S6, so that the temperature of the storage compartment can be lowered again. It is desirable.

Additionally, the cooling output determined in step S9 may be greater than the delay output determined in step S6, and may be smaller than or equal to the cooling output determined in step S3 before step S6.

Meanwhile, each of the determined cooling outputs (P3, P5, P7) is a value greater than any one of the delay outputs (P2, P4, P6), and is determined to be a value smaller than or equal to any one of the previous cooling outputs. You can.

Meanwhile, the cooling outputs (P3, P5, P7) determined in step S9 may be outputs between the delay outputs (P2, P4, P6) and the previously determined cooling outputs.

Although not limited, when the detected temperature of the storage compartment (T2) reaches the third reference temperature, each cooling output (P3, P5, P7) is (delay output (P2, P4) driven in the previous step. , P6) and any one of the cooling outputs driven in the previous step) can be determined by the value of x α. At this time, α is greater than 0 and less than 1, can be set in advance in memory, and can be set by the user or changed automatically.

For example, when the detected temperature (T2) of the storage compartment reaches the third reference temperature, the cooling output (P3, P5, P7) is (the sum of the delay output and the previously determined cooling output) x 0.5 It may be determined by the value of (the average output value of the delay output and the previously determined cooling output), but is not limited to this.

Meanwhile, as shown in FIG. 2A, after the cold air supply means is operated with the determined cooling output (P3) (S9), if the power-off command of the refrigerator is not input (S9-1), proceed to step S4. You can return and repeat steps S4 to S9.

That is, in FIG. 2A, after completing step S9, step S9-1 can be performed immediately without detecting the storage room temperature (T3), and if the power-off command of the refrigerator is not input (S9-1), proceed to step S4. You can return.

Meanwhile, as shown in FIG. 2B, while operating with the cooling output (P3) determined in step S9, the control unit 50 determines whether the detected temperature (T3) of the storage compartment is below the third reference temperature (S10) ) can be added.

As a result of the determination in step S10, if the detected temperature (T3) of the storage compartment is below the third reference temperature, the process returns to step S4 unless a power-off command for the refrigerator is input (S20). Therefore, steps S4 to S9 can be performed repeatedly.

At this time, if steps S4 to S9 are repeated, as shown in FIG. 5, the temperature of the storage compartment may converge between the third reference temperature and the second reference temperature.

In addition, when steps S4 to S9 are repeated, the cooling outputs P3, P5, and P7), which are determined when the detected temperature (T2) of the storage compartment reaches the third reference temperature, gradually decrease, as shown in FIG. It will decrease and become closer to the delay outputs (P2, P4, P6).

If steps S4 to S9 are repeated in this way, the cooling output gradually decreases when the cold air supply means is operated, so there is an advantage that the power consumption of the cold air supply means can be reduced even if the cold air supply means is operated continuously.

Hereinafter, with reference to FIG. 3, protection logic (A) (S12 to S13) will be described.

After detecting the storage compartment temperature (T2) in the section (i.e., temperature rise section) in which the cold air supply means operates with the delay output determined in step S6 (S7), it is determined whether the temperature of the storage compartment decreases in the temperature rise section. A judgment step (S12) may be added.

If it is determined in step S12 that the temperature of the storage compartment is decreasing, a step S13 of reducing or stopping the delay output may be added.

That is, step S8 may be omitted in FIG. 2A or FIG. 2B and proceed directly to step S12.

When the refrigerator door is open, the temperature of the storage room decreases due to inflow of outside air lower than the air in the storage room, or when additional cold source is introduced into the storage room, or when the preset α is high, etc. If the temperature T2 decreases, there is a possibility that the storage compartment may be overcooled, so it is necessary to minimize the delay in temperature increase in the storage compartment, so step S12 may be performed.

After the cold air supply means starts operating with the delay output (P6 in FIG. 6) determined in step S6, the change in temperature (T2) of the storage compartment during a certain period of time has a negative value, or the cold air supply means The storage room temperature (T2) while operating with this delay output (P6) reaches a value below a certain value (e.g., the storage room temperature or the second reference temperature when starting operation with the delay output (P6)). In this case, it may be determined that the temperature of the storage room decreases in the temperature increase section.

Alternatively, if it is determined in step S8 that the detected temperature (T2) of the storage compartment has not reached the third reference temperature, the control unit 50 determines whether the temperature (T2) of the storage compartment decreases in the temperature rise section. It is possible to determine whether or not (S12).

If it is determined in step S12 that the temperature T2 of the storage compartment is decreasing, a step S13 of reducing the delay output or stopping the cold air supply means may be added.

As an example, the control unit 50 delays the cold air supply means so that the cold air supply means operates at either the minimum output or the delay output (P4, P2 in FIG. 6) determined in the previous stage of the current output. The output (P7 in Figure 6) can be determined.

Alternatively, the control unit 50 may determine the average output value of the previously determined delay outputs P4 and P2 as the delay output P7 of the cold air supply means. Alternatively, α may be reduced to determine a smaller value than the previous delay output as the delay output (P7).

Meanwhile, after performing the step (S13) of reducing or stopping the delay output as above and detecting the temperature of the storage room, a step of determining again whether the temperature of the storage room decreases in the temperature rising section can be added. . As a result of the determination, if it is determined that the temperature of the storage compartment is decreasing, the delay output can be further reduced.

Meanwhile, when the cold air supply means is stopped or operates at a reduced output including the minimum output (S13), and after detecting the storage room temperature, when it is determined that the temperature of the storage room is not decreasing, the protection logic (A) is activated. It can be configured to cancel repeated execution. Alternatively, when operating for a certain period of time with the reduced output, the protection logic (A) can be configured to cancel execution.

Canceling the execution of the protection logic (A) means returning to any of steps S1 to S9-1 (“basic logic”) and performing subsequent steps (S13-1).

For example, after the cold air supply means is stopped or operated at a reduced output including the minimum output, if the temperature of the storage compartment becomes higher than the first reference temperature, steps after step S2 can be performed. Alternatively, after the cold air supply means is stopped or operated at a reduced output including the minimum output, if the temperature of the storage compartment falls below the second reference temperature, steps after step S5 can be performed. Alternatively, after the cold air supply means is stopped or operated at a reduced output including the minimum output, when the temperature of the storage compartment reaches the third reference temperature, steps after step S8 can be performed.

For example, in FIG. 6, the delay output (P6) is driven, but if the temperature of the storage compartment is supercooled below the second reference temperature, the cold air supply means is switched to the delay output (P7) modified according to the protection logic (A). This can be driven.

When the cold air supply means is driven by the delay output (P7) and the storage compartment temperature rises again, the protection logic (A) is canceled and returns to the basic logic.

Therefore, when the storage room temperature reaches the third reference temperature, the output (P8) of the next stage will be determined by the value of (the sum of the cooling output (P6) of the previous stage and the delay output (P7) of the previous stage) x α. You can. Since the delay output (P6) does not actually increase the temperature of the storage compartment but rather cools it, it is recognized as the cooling output (P6) of the previous stage.

For example, if it is determined in step S12 that the detected temperature T2 of the storage compartment is below the second reference temperature, the control unit 50 may stop the operation of the cold air supply means (S13). In the case of constant temperature control in the refrigerator compartment in the present invention, stopping the operation of the cold air supply means actually means controlling the opening angle of the damper so that the opening angle of the damper is 0.

Alternatively, when the delay outputs (P2, P4, and P6) are higher than the minimum output, the control unit 50 can control the cold air supply means to operate at the minimum output.

If the cold air supply means is stopped or operated at minimum power, the temperature of the storage compartment will increase.

Meanwhile, after performing step S13, α can be varied. For example, after performing step S13, α may be set to a value lower than the current value.

When the temperature (T3) of the storage compartment reaches a value higher than the first reference temperature while the cold air supply means is operating as a cooling output, for example, when the refrigerator door is opened and the temperature of the storage compartment increases, or when the temperature of the storage compartment increases, This may be the case where additional food is introduced or the preset α is low.

Hereinafter, the protection logic (B) (S14 to S16) related to FIG. 4 will be described.

In a section (i.e., temperature drop section) in which the cold air supply means operates at the cooling output (P7 in FIG. 5) determined in step S9, after detecting the temperature (T3) of the storage compartment (S10), the storage compartment If it is determined that the temperature is rising (S14), a step of increasing the cooling output (S15) may be added. That is, step S14 can be performed immediately after completing step S9-1 in FIG. 2A.

When the temperature of the storage compartment increases when the refrigerator door is opened, when additional food is introduced into the storage compartment, or when the preset α is low, etc., if the temperature of the storage compartment (T3) rises in the above temperature drop section, the storage compartment may overheat. Because of this possibility, the delay in temperature drop in the storage room should be minimized.

In order to increase the cooling output, for example, the control unit 50 adjusts the cooling output to one of the maximum output of the cold air supply means or the cooling output (P5, P3, P1) determined in the previous stage of the current output. The cooling output (P8) of the cold air supply means can be determined to operate. Alternatively, the control unit 50 may determine the average output value of the previously determined cooling outputs (P5, P3, and P1) as the cooling output (P8) of the cold air supply means. Alternatively, α can be increased to determine a larger value than the previous cooling output as the cooling output (P8).

After the cold air supply means starts operating with the cooling output (P7 in FIG. 5), the change in temperature (T3) of the storage compartment has a positive value for a certain period of time, or the cold air supply means has a positive value. The storage room temperature (T3) while operating with the output (P7) reaches a value greater than a certain value (e.g., the temperature of the storage room or the first reference temperature when starting to operate with the cooling output (P7)) or the cold air supply After the means operates with the cooling output (P7), the temperature of the storage compartment (T3) at a certain time has passed to a certain value (for example, the temperature of the storage compartment when the means starts operating with the cooling output (P7) or When a value exceeding the first reference temperature is reached, or when a certain period of time has elapsed after the refrigerator door is opened, it can be determined that the temperature of the storage compartment increases in the temperature drop section.

Meanwhile, as shown in FIG. 2B, after detecting the temperature (T3) of the storage compartment in step S10, if the detected temperature (T3) of the storage compartment exceeds the third reference temperature, the temperature (T3) of the storage compartment in the temperature drop section It can also be configured to determine whether is rising (S14).

If it is determined in step S14 that the temperature T3 of the storage compartment is rising, the cooling output P8 can be increased from the previous cooling output P7 (S15).

Meanwhile, after performing the step of increasing the cooling output (S15) and detecting the storage room temperature (T4) (S16), a step (S19) of determining again whether the storage room temperature (T4) increases in the temperature falling section is added. can do. If it is determined in step S19 that the temperature (T4) of the storage compartment is rising, the cooling output can be configured to increase again (S15). That is, after detecting the storage room temperature (T4) in step S16, step S19 can be performed immediately.

Meanwhile, after performing the step of increasing the cooling output as described above (S15) and detecting the storage room temperature (T4) (S16), determining whether the detected temperature (T4) has reached the third reference temperature (S16) S17) can be added. As a result of the determination in step S17, if the detected temperature has not reached the third reference temperature, a step (S19) of re-determining whether the temperature (T4) of the storage compartment increases in the temperature falling section is added to re-energize the cooling output. It can be done to increase it.

Meanwhile, after the cold air supply means operates with increased output (S15) and detects the storage room temperature (T4) (S16), when it is determined that the temperature of the storage room is not rising (S19), the protection logic (B) ) can be canceled. Alternatively, when operating for a certain period of time with the increased output, performing the protection logic (B) may be canceled.

Canceling performance of the protection logic (B) may mean returning to any of steps S1 to S9-1 (basic logic) and performing subsequent steps.

For example, after the cold air supply means operates at an increased output (S15), if the temperature of the storage compartment becomes higher than the first reference temperature, steps after step S3 can be performed.

Alternatively, after the cold air supply means operates at an increased output, if the temperature of the storage compartment falls below the second reference temperature, steps after step S6 may be performed.

Alternatively, after the cold air supply means operates at an increased output, when the temperature of the storage compartment reaches the third reference temperature, steps after step S9 can be performed.

For example, in FIG. 5, the cold air supply means is driven by the cooling output (P7), but when the temperature of the storage compartment overheats above the first reference temperature, the cooling output (P8) is modified according to the protection logic (B). The cold air supply means can be driven. When the cold air supply means is driven by the cooling output (P8) and the temperature of the storage room decreases again, the protection logic (B) is canceled and the basic logic can be returned. Therefore, when the storage room temperature reaches the third reference temperature, the output (P9) of the next stage can be determined by the value of x α, the sum of the cooling output (P8) of the previous stage and the delay output (P7) of the previous stage. Since the cooling output (P7) actually increases the temperature of the storage compartment rather than lowering it, it is recognized as the delay output (P7) of the previous step.

Referring to FIG. 5, for example, when the temperature (T3) of the storage compartment detected while the cold air supply means is operating with the cooling output (P7) is higher than the first reference temperature, the control unit 50 controls the storage compartment. In order to lower the temperature, the current cooling output of the cold air supply means is increased.

As an example, the control unit 50 may determine the cooling output (P5) determined immediately before the current cooling output (P7) as the increased cooling output (P8). Even if the cold air supply means is driven by the cooling output (P8), if the temperature (T3) of the storage compartment is higher than the first reference temperature, the control unit 50 outputs the cooling output determined immediately before the cooling output (P5). (P3) can be determined as the increased cooling output.

Since the previously determined cooling output (P5, P3, P1) is higher than the current cooling output (P7), the temperature of the storage compartment will be lower than the first reference temperature by increasing the cooling output of the cold air supply means. will be.

While the cold air supply means is operating with the changed cooling output (P8), the temperature (T4) of the storage compartment is detected (S16).

Then, the control unit 50 determines whether the detected temperature (T4) of the storage compartment has reached the third reference temperature (S17).

As a result of the determination in step S17, if it is determined that the detected temperature (T4) of the storage compartment has reached the third reference temperature, the control unit 50 adjusts the current cooling output of the cold air supply means (current cooling output and the previous cooling output). (Sum of cooling output determined in) x α (S18).

Unlike step S17, in step S15, while the cold air supply means is operating at the previously determined cooling output (P8 = P5), the control unit 50 determines that the detected temperature of the storage compartment (T4) is the second reference temperature. It is also possible to determine whether the following values have been reached. And, when the detected temperature T4 of the storage compartment reaches a value lower than the second reference temperature, the control unit 50 may cause the cold air supply means to operate as a delay output.

Meanwhile, as a result of determination in step S17, if it is determined that the detected temperature (T4) of the storage compartment has not reached the third reference temperature, the control unit 50 adjusts the cooling output to increase the temperature in the section in which the cold air supply means operates. It is possible to determine whether or not it is done (S19).

As an example, the control unit 50 may determine whether the detected temperature T4 of the storage compartment is greater than or equal to the first reference temperature.

As a result of the determination in step S19, if the detected temperature (T4) of the storage compartment is higher than the first reference temperature, the control unit 50 additionally increases the current cooling output of the cold air supply means (S15).

For example, when the cold air supply means is operated with the previously determined cooling output (P5), but the detected temperature (T4) of the storage compartment is higher than the first reference temperature, the control unit 50 operates the previously determined cooling output (P5). The cold air supply means can be operated using the output (P3).

In the present invention, when the cold air supply means is operated as a delay output, the delay output is not changed unless the temperature of the storage compartment falls below the second reference temperature. That is, the delay output may be a fixed output that is unrelated to temperature changes in the storage compartment.

As a result, the compressor and fan motor constituting the cold air supply means do not stop unless the temperature of the storage compartment falls below the second reference temperature.

According to the present invention, the compressor 21 and the fan motor 25 continue to operate without stopping, but the output is controlled so that the driven output gradually converges to a state close to the minimum output, so that the compressor 21 operates according to the storage room temperature. There is an advantage in reducing power consumption compared to the case of repeating the on-off process of (21) and the fan motor (25).

In addition, because the storage room temperature is maintained at a constant temperature within the set range, stored food has the advantage of being able to remain fresh for a long time without repeatedly experiencing supercooling and withering conditions.

Figures 7 and 8 are graphs showing changes in the temperature of the storage compartment and the output of the cold air supply means according to the refrigerator control method according to the second embodiment of the present invention.

This embodiment is the same as the first embodiment in other respects, but there is a difference in the method of determining cooling output. Therefore, hereinafter, only the characteristic parts of this embodiment will be described, and the description of the first embodiment will be used for parts that are the same as those of the first embodiment.

2 to 4, 7 and 8, steps S1 to S6 of the first embodiment are the same as the constant temperature control method of the present embodiment, so detailed description is omitted, but there is a difference in step S8, so the first embodiment The difference from step S8 in the example will be explained.

In this embodiment, while the cold air supply means is operating as the delay output (P2), the control unit 50 determines whether the detected temperature (T2) of the storage compartment has reached a value that is higher than the first reference temperature. do.

If it is determined that the detected temperature of the storage compartment has reached a value higher than the first reference temperature, the control unit 50 determines the cooling output (P3, P5, P7) of the cold air supply means, and the determined cooling output (P3, P5, P7) controls the operation of the cold air supply means.

Meanwhile, while the cold air supply means operates as a cooling output (P3, P5, P7), the control unit 50 determines whether the detected temperature of the storage compartment reaches a value below the second reference temperature. If it is determined that the detected temperature of the storage compartment has reached a value below the second reference temperature, the control unit 50 determines the delay outputs (P4, P6) of the cold air supply means, and the determined delay output ( P4, P6) controls the operation of the cold air supply means.

Other than that, the method of determining the cooling output and delay output and all operation logic including protection logic (A) and (B) are the same as the first embodiment.

9 to 11 are graphs showing changes in the temperature of the storage compartment and changes in the output of the cold air supply means according to the refrigerator control method according to the third embodiment of the present invention.

This embodiment is the same as the first embodiment in other respects, but there is a difference in the method of determining cooling output. Therefore, hereinafter, only the characteristic parts of this embodiment will be described, and the description of the first embodiment will be used for parts that are the same as those of the first embodiment.

First, referring to FIGS. 1 to 4 and FIG. 9, the temperature of the storage compartment is detected by a temperature sensor for constant temperature control, and when the detected temperature of the storage compartment is higher than the first reference temperature, the control unit 50, In order to lower the temperature of the storage compartment, the cooling output (P1.1) of the cold air supply means is determined, and the cold air supply means is operated at the determined cooling output (P1.1) (see S3 in FIG. 2).

When the cold air supply means operates with a cooling output (P1.1), the temperature of the storage compartment decreases, and the control unit 50 controls the current temperature when the temperature of the storage compartment reaches a predetermined temperature higher than the second reference temperature. Cooling output can be reduced.

At this time, the predetermined temperature may be the average temperature of the first reference temperature and the second reference temperature, or the target temperature of the storage compartment (may be the third reference temperature).

When the temperature of the storage compartment reaches a value below the second reference temperature while the cold air supply means is operating with the changed cooling output (P1.2), the control unit 50 controls the cold air supply means to operate with the changed cooling output (P1.2). ) to operate.

And, when the reference temperature of the storage compartment reaches the third reference temperature while the cold air supply means is operating as the delay output (P2), the control unit 50 determines the cooling output (P3).

Other than that, the method of determining the cooling output and delay output and all operation logic including protection logic (A) and (B) are the same as the first embodiment.

Meanwhile, as shown in FIG. 10, when the temperature of the storage compartment is higher than the first reference temperature, the control unit 50 determines the cooling output (P1.1) of the cold air supply means to lower the temperature of the storage compartment, and the determined cooling output (P1.1) causes the cold air supply means to operate (see S3 in Figure 2).

Even if the temperature of the storage compartment increases without decreasing and reaches the first reference temperature while the cold air supply means is operating at the determined cooling output (P1.1), the control unit 50 may increase the current cooling output. (same as the protection logic (B) described in the first embodiment).

Next, referring to FIG. 11, when the temperature of the storage compartment does not rise but falls below the second reference temperature while the cold air supply means is operating as a delay output (P2, P4, P5), the control unit 50 Can reduce the output of the cold air supply means or stop its operation (same as the protection logic (A) described in the first embodiment).

Figure 12 is a graph showing the temperature change in the storage compartment and the output change of the cold air supply means according to the refrigerator control method according to the fourth embodiment of the present invention.

This embodiment is the same as the first embodiment in other respects, but there is a difference in the method of determining cooling output. Therefore, hereinafter, only the characteristic parts of this embodiment will be described, and the description of the first embodiment will be used for parts that are the same as those of the first embodiment.

Referring to FIGS. 1 and 12 , in order to control the constant temperature, the temperature of the storage compartment is sensed by a temperature sensor, and when the detected temperature of the storage compartment is higher than the first reference temperature, the control unit 50 lowers the temperature of the storage compartment. To this end, the cooling output (P1.1) of the cold air supply means is determined, and the cold air supply means is operated at the determined cooling output (P1.1) (see S3 in FIG. 2).

When the cold air supply means operates at the cooling output (P1.1), the temperature of the storage compartment decreases, and the control unit 50 reduces the current cooling output when the temperature of the storage compartment reaches the third reference temperature. .

When the temperature of the storage compartment reaches a value below the second reference temperature while the cold air supply means is operating with the changed cooling output (P1.2), the control unit 50 controls the cold air supply means to operate with the changed cooling output (P1.2). ) to operate.

While the cold air supply means operates as a delay output (P2), the control unit 50 determines whether the detected temperature of the storage compartment has reached a value equal to or higher than the first reference temperature.

If it is determined that the detected temperature of the storage compartment has reached a value higher than the first reference temperature, the control unit 50 determines the cooling output (P3, P5, P7) of the cold air supply means, and the determined cooling output (P3, P5, P7) controls the operation of the cold air supply means.

Other than that, the method of determining the cooling output and delay output and all operation logic including protection logic (A) and (B) are the same as the first embodiment.

Figure 13 is a graph showing the temperature change in the storage compartment and the output change of the cold air supply means according to the refrigerator control method according to the fifth embodiment.

This embodiment is the same as the first embodiment in other respects, but there is a difference in the method of determining the delay output. Therefore, hereinafter, only the characteristic parts of this embodiment will be described, and the description of the first embodiment will be used for parts that are the same as those of the first embodiment.

5 to 12 are not necessarily the case, but on the one hand, the delay outputs (P2, P4, P6) may be fixed values, and the cooling outputs (P3, P5, P7) may be adjusted. You may understand. On the other hand, although this is not necessarily the case in Figure 13, it can be understood in a way that the cooling outputs (P3, P5, P7) may be fixed values, and the delay outputs (P2, P4, P6) may be adjusted. Although only one embodiment in which the delay output is adjusted is shown in FIG. 13, a method in which the delay output is adjusted corresponding to each of the embodiments from FIGS. 5 to 12 is also possible.

Meanwhile, it is also possible to mix the methods from FIGS. 5 to 12 and the method of FIG. 13 so that both the cooling output and the delay output are adjusted in some sections or all sections).

Referring to FIG. 13, in order to control the constant temperature, the temperature of the storage compartment is sensed by a temperature sensor, and when the detected temperature of the storage compartment is higher than the first reference temperature, the control unit 50 sends cold air to lower the temperature of the storage compartment. The cooling output (P1) of the supply means is determined, and the cold air supply means is operated with the determined cooling output (P1).

When the cold air supply means operates as a cooling output (P1), the temperature of the storage compartment decreases, and when the temperature of the storage compartment reaches a value below the second reference temperature, the control unit 50 causes the cold air supply means to output a delay output. Let it operate with (P2).

While the cold air supply means operates as a delay output (P2), the control unit 50 determines whether the detected temperature (T2) of the storage compartment has reached a value equal to or higher than the first reference temperature.

If it is determined that the detected temperature of the storage compartment has reached a value higher than the first reference temperature, the control unit 50 determines the cooling output (P3, P5) of the cold air supply means, and the determined cooling output (P3) , P5, and P7) control the cold air supply means to operate.

At this time, the cooling outputs (P3, P5) may be fixed outputs that do not vary. For example, the cooling output may be determined as the maximum output or an output lower than the maximum output. Alternatively, the cooling outputs P3 and P5 may be the initially determined cooling output P1 (initial cooling output).

When the temperature of the storage compartment reaches a value below the second reference temperature while the cold air supply means is operating as the cooling output (P3, P5), the control unit 50 controls the delay output (P4) of the cold air supply means. , P6) is determined, and the cold air supply means is controlled to operate using the determined delay outputs (P4, P6).

It is desirable that the delay outputs (P4, P6) are determined to be larger than the delay output (P2) of the previous step.

Meanwhile, the delay outputs (P4, P6) are smaller than the cooling output of the previous stage, and may be determined to be greater than or equal to the delay output (P3) of the previous stage.

Each delay output (P4, P6) is a value smaller than any one of the cooling outputs (P1, P3, P5), and may be determined to be greater than or equal to any one of the outputs between the previous delay outputs.

Alternatively, the delay outputs (P4, P6) may be outputs between the cooling output of the previous stage and the delay output (P2) of the previous stage.

Meanwhile, although not limited, when the detected temperature of the storage compartment (T2) reaches the third reference temperature, each delay output (P4, P6) is the cooling output (P1, P3, It can be determined as the value of the sum x β of any one of P5) and one of the delay outputs driven in the previous step. At this time, β is greater than 0 and less than 1, can be set in memory in advance, and can be set by the user or changed automatically.

As an example, when the detected temperature (T2) of the storage compartment reaches a value below the second reference temperature, the delay outputs (P4, P6) are (the sum of the cooling output and the previously determined delay output) x It may be determined as a value of 0.5 (the average output value of the cooling output and the previously determined delay output), but is not limited to this.

Figure 14 is a graph showing the temperature change in the storage compartment and the output change of the cold air supply means according to the refrigerator control method according to the sixth embodiment.

This embodiment is the same as the first embodiment in other respects, but there is a difference in the method of determining the delay output. Therefore, hereinafter, only the characteristic parts of this embodiment will be described, and the description of the first embodiment will be used for parts that are the same as those of the first embodiment.

Compared with the embodiments from FIGS. 5 to 12 and the embodiment of FIG. 13, the embodiment of FIG. 14 has both cooling outputs (P3, P5, P7) and delay outputs (P2, P4, P6) adjusted. It's a method. Although only one embodiment is shown in FIG. 14, it can be applied to all corresponding embodiments in FIGS. 5 to 13.

Referring to FIG. 14, in order to control the constant temperature, the temperature of the storage compartment is sensed by a temperature sensor, and when the detected temperature of the storage compartment is higher than the first reference temperature, the control unit 50 sends cold air to lower the temperature of the storage compartment. The cooling output (P1) of the supply means is determined, and the cold air supply means is operated with the determined cooling output (P1).

When the cold air supply means operates as a cooling output (P1), the temperature of the storage compartment decreases, and when the temperature of the storage compartment reaches a value below the second reference temperature, the control unit 50 causes the cold air supply means to output a delay output. Let it operate with (P2).

While the cold air supply means operates as a delay output (P2), the control unit 50 determines whether the detected temperature of the storage compartment has reached the third reference temperature.

When it is determined that the detected temperature of the storage compartment has reached the third reference temperature, the control unit 50 determines the cooling output (P3, P5) of the cold air supply means, and the determined cooling output (P3, P5) ) to control the operation of the cold air supply means.

The method of determining the cooling output is the same as the method applied in the embodiments of FIGS. 5 to 12.

When the temperature of the storage compartment reaches a value below the second reference temperature while the cold air supply means is operating as the cooling output (P3, P5), the control unit 50 controls the delay output (P4) of the cold air supply means. , P6) is determined, and the cold air supply means is controlled to operate using the determined delay outputs (P4, P6).

The method of determining the delay output is the same as the method applied in the embodiment of FIG. 13.

Figure 15 is a diagram schematically showing a refrigerator according to a seventh embodiment of the present invention.

Referring to FIG. 15 , unlike the refrigerator of the first embodiment, the refrigerator 1A of this embodiment may include an evaporator 24 for the freezer compartment and an evaporator 25 for the refrigerator compartment.

Additionally, the refrigerator 1A may include a freezer fan 28, a first fan motor 27, a refrigerator fan 30, and a second fan motor 29.

In addition, the refrigerator 1A includes a compressor 21, a condenser 22, an expansion member 23, and the refrigerant passing through the expansion member 23 into the freezer evaporator 24 and the refrigerator evaporator 26. ) may include a valve 26 to allow it to flow in any one of the following.

In this embodiment, constant temperature control of the freezing compartment 111 is possible by controlling the compressor 21 and the first fan motor 27, and constant temperature control of the refrigerating compartment 112 is possible by controlling the compressor 21 and the second fan motor 29. ) is possible through control. In addition, constant temperature control of the refrigerating compartment 112 is possible by controlling the opening angle of the valve 26.

Therefore, in the case of the refrigerator in this embodiment, the control method for constant temperature mentioned in the first to sixth embodiments can be applied as is.

Figure 16 is a diagram schematically showing a refrigerator according to an eighth embodiment of the present invention.

Referring to FIG. 16, unlike the refrigerator of the first embodiment, the refrigerator 1B of this embodiment includes a cabinet 11 having a freezer compartment 111 and a refrigerator compartment 112, an evaporator 127 for the freezer compartment, and a refrigerator compartment. A practical evaporator 128, a compressor 121 for the freezer, a compressor 122 for the refrigerator, a condenser (123, 124), an expansion member for the freezer 125, an expansion member 126 for the refrigerator, and a refrigerator It may include a practical fan motor assembly 129 and a fan motor assembly 130 for a refrigerator.

In the present invention, the freezing compartment 111 and the refrigerating compartment 112 can be independently cooled by separate compressors and evaporators.

However, the condensers (123, 124) form one heat exchanger, but can be divided into two parts to allow the refrigerant to flow. That is, the refrigerant discharged from the compressor 121 for the freezer can flow through the first part 123 of the condensers 123 and 124, and the refrigerant discharged from the compressor 122 for the refrigerator compartment can flow in the condensers 123 and 124. The second part 124 can move.

Meanwhile, in the case of this embodiment as well, the control method for constant temperature described in the first to sixth embodiments can be applied as is, except that the freezer compartment 111 and the refrigerator compartment 112 are independently cooled.

That is, in this embodiment, constant temperature control of the freezer compartment 111 is possible by controlling the freezer compressor 121 and the freezer fan motor assembly 129, and constant temperature control of the refrigerator compartment 112 is possible by controlling the refrigerator compartment compressor 122. This is possible by controlling the fan motor assembly 130 for the refrigerator.

12: Damper 21: Compressor
26: fan motor 50: control unit
111: Freezer 112: Refrigerator

Claims (38)

A step in which the temperature of the storage room is detected;
If the detected temperature of the storage room is higher than the first reference temperature, operating the cold air supply means as a cooling output;
While the cold air supply means is operating with a cooling output, if the detected temperature of the storage compartment is below the second reference temperature lower than the first reference temperature, the cold air supply means is operated with a delay output that is lower than the cooling output. step; and
While the cold air supply means is operating with a delay output, the control unit determines the cooling output or delay output of the cold air supply means according to the temperature of the storage compartment, and supplies the cold air with the determined cooling output or delay output. comprising activating the means,
While the cold air supply means is operating as a delay output, if the temperature of the storage compartment rises to a predetermined temperature higher than the second reference temperature,
The control unit determines the cooling output of the cold air supply means as the value of x α (the sum of the previously determined cooling output and delay output),
Operating the cold air supply means with the determined cooling output,
α is greater than 0 and less than 1, a refrigerator control method. According to claim 1,
A method of controlling a refrigerator wherein the delay output of the cold air supply means is an output greater than 0. According to claim 1,
The control unit determines the cooling output of the cold air supply means to be greater than the previously determined delay output and smaller than or equal to the cooling output of the previous stage,
A refrigerator control method for operating the cold air supply means with a determined cooling output. According to claim 1,
While the cold air supply means is operating as a delay output, the storage compartment temperature is detected, and if it is determined that the storage compartment temperature is decreasing, the refrigerator further includes the step of reducing the delay output or stopping the cold air supply means. Control method. According to claim 1,
A method of controlling a refrigerator further comprising: detecting the temperature of the storage compartment while the cold air supply means is operating at cooling output, and increasing the cooling output when it is determined that the temperature of the storage compartment is rising. According to claim 2,
While the cold air supply means is operating with the determined cooling output, when the detected temperature of the storage compartment reaches the second reference temperature, the control unit determines a delay output and operates the cold air supply means with the determined delay output. Refrigerator control method. According to claim 2,
A method of controlling a refrigerator wherein the predetermined temperature is the first reference temperature. According to claim 2,
The predetermined temperature is an average temperature of the first reference temperature and the second reference temperature. According to claim 2,
The predetermined temperature is a temperature between the first reference temperature and the second reference temperature and is a target temperature of the storage compartment. According to claim 2,
While the temperature of the storage compartment rises to a predetermined temperature and the cold air supply means is operated at the determined cooling output, when the detected temperature of the storage compartment reaches the first reference temperature, the control unit determines the current temperature of the cold air supply means. Refrigerator control method to increase cooling output. According to claim 10,
A method of controlling a refrigerator in which the increased cooling output is one cooling output among previously determined cooling outputs. According to claim 10,
The increased cooling output is an average output of the previously determined cooling output. According to claim 10,
While the cold air supply means is operating with the increased cooled output, when the temperature of the storage compartment reaches a predetermined temperature, the control unit determines the cooling output or the delay output, and the determined cooling output or delay output. A control method of a refrigerator that operates the cold air supply means. According to claim 6,
After the detected temperature of the storage compartment reaches the second reference temperature, while the cold air supply means is operating with the determined delay output, if the temperature of the storage compartment falls below the second reference temperature, the control unit supplies the cold air. A refrigerator control method that stops the device. According to claim 6,
After the detected temperature of the storage compartment reaches the second reference temperature, while the cold air supply means is operating with the determined delay output, if the temperature of the storage compartment falls below the second reference temperature, the control unit supplies the cold air. A refrigerator control method that operates the means at minimum output. According to claim 1,
While the cold air supply means is operating with the cooling output, the cooling output is varied one or more times until the temperature of the storage compartment reaches a second reference temperature. According to claim 16,
While the cold air supply means is operating with the cooling output, when the temperature of the storage compartment reaches a predetermined temperature higher than the second reference temperature, the cooling output is reduced. According to claim 17,
The predetermined temperature is an average temperature of the first reference temperature and the second reference temperature. According to claim 17,
The predetermined temperature is a temperature between the first reference temperature and the second reference temperature and is a target temperature of the storage compartment. A step in which the temperature of the storage room is detected;
If the detected temperature of the storage room is higher than the first reference temperature, operating the cold air supply means as a cooling output;
While the cold air supply means is operating with a cooling output, if the detected temperature of the storage compartment is below the second reference temperature lower than the first reference temperature, the cold air supply means is operated with a delay output that is lower than the cooling output. step; and
While the cold air supply means is operating with a delay output, the control unit determines the cooling output or delay output of the cold air supply means according to the temperature of the storage compartment, and supplies the cold air with the determined cooling output or delay output. comprising activating the means,
The temperature of the storage compartment rises to a predetermined temperature higher than the second reference temperature,
While the cold air supply means is operating at the determined cooling output, when the detected temperature of the storage compartment reaches the second reference temperature,
The control unit determines the delay output of the cold air supply means as a value of (the sum of the cooling output and the previously determined delay output) x β,
Operating the cold air supply means with the determined delay output,
β is greater than 0 and less than 1, the refrigerator control method. According to claim 20,
The control unit determines the delay output of the cold air supply means to be greater than the previously determined cooling output and greater than or equal to the delay output of the previous step,
A refrigerator control method for operating the cold air supply means with a determined delay output. According to claim 1,
A method of controlling a refrigerator in which the delay output is a fixed output regardless of temperature. According to claim 1,
A method of controlling a refrigerator wherein the delay output is an output greater than the minimum output of the cold air supply means. According to claim 1,
A method of controlling a refrigerator wherein the cooling output of the cold air supply means at the beginning of operation of the refrigerator is the maximum output of the cold air supply means. delete A step in which the temperature of the storage room is detected;
If the detected temperature of the storage room is higher than the first reference temperature, operating the cold air supply means as a cooling output;
While the cold air supply means is operating with a cooling output, if the detected temperature of the storage compartment is below the second reference temperature lower than the first reference temperature, the cold air supply means is operated with a delay output that is lower than the cooling output. step; and
While the cold air supply means is operating with a delay output, the control unit determines the cooling output or delay output of the cold air supply means according to the temperature of the storage compartment, and supplies the cold air with the determined cooling output or delay output. comprising activating the means,
While the cold air supply means is operating with a delay output, when the temperature of the storage compartment reaches the first reference temperature, the control unit operates the cold air supply means with a previously determined cooling output,
When the temperature of the sensed storage compartment reaches the second reference temperature while the cold air supply means is operating at the previously determined cooling output,
The control unit determines the delay output of the cold air supply means as a value of (the sum of the cooling output and the previously determined delay output) x β,
Operating the cold air supply means with the determined delay output,
β is greater than 0 and less than 1, the refrigerator control method. A step in which the temperature of the storage room is detected;
If the detected temperature of the storage room is higher than the first reference temperature, operating the cold air supply means as a cooling output;
While the cold air supply means is operating with a cooling output, if the detected temperature of the storage compartment is below the second reference temperature lower than the first reference temperature, the cold air supply means is operated with a delay output that is lower than the cooling output. step; and
While the cold air supply means is operating with a delay output, the control unit determines the cooling output or delay output of the cold air supply means according to the temperature of the storage compartment, and supplies the cold air with the determined cooling output or delay output. comprising activating the means,
While the cold air supply means is operating with a delay output, when the temperature of the storage compartment reaches the first reference temperature, the control unit operates the cold air supply means with a previously determined cooling output,
A control method for a refrigerator in which the cooling output is a fixed output. According to claim 1,
The cold air supply means includes at least one of a compressor that compresses refrigerant and a fan motor that rotates a fan for circulating cold air in the storage compartment. According to claim 1,
The storage compartment includes a freezer and a refrigerator,
A method of controlling a refrigerator, wherein the cold air supply means includes a damper that controls cold air from the freezer compartment to flow into the refrigerator compartment. A step in which the temperature of the storage room is detected;
If the detected temperature of the storage room is higher than the first reference temperature, operating the compressor with an initial cooling output;
While the compressor is operating at the initial cooling output, if the detected temperature of the storage compartment is below the second reference temperature lower than the first reference temperature, operating the compressor at the delayed output lower than the initial cooling output. ; and
While the compressor is operating with a delay output, the control unit determines the cooling output or delay output of the compressor according to the temperature of the storage compartment, and operates the compressor with the determined cooling output or delay output. Including,
The delay output is an output greater than 0,
A method of controlling a refrigerator in which the control unit continuously operates the compressor without stopping so that the temperature of the storage compartment is maintained within the first and second reference temperature ranges. A step in which the temperature of the storage room is detected;
When the detected temperature of the storage compartment is higher than the first reference temperature, operating a fan motor for circulating cold air in the storage compartment with an initial cooling output;
While the fan motor is operating at the initial cooling output, if the detected temperature of the storage room is below the second reference temperature lower than the first reference temperature, the fan motor is operated at the delay output which is lower than the initial cooling output. stage of becoming; and
While the fan motor is operated with a delay output, the control unit determines the cooling output or delay output of the fan motor according to the temperature of the storage compartment, and operates the fan motor with the determined cooling output or delay output. Including the step of ordering,
The delay output is an output greater than 0,
A method of controlling a refrigerator in which the control unit continuously operates the fan motor without stopping so that the temperature of the storage compartment is maintained within a first and second reference temperature range. A step of detecting the temperature of the refrigerator compartment;
When the temperature of the refrigerating compartment is higher than the first reference temperature, opening the damper to an opening angle for cooling to allow cold air from the freezer to flow into the refrigerating compartment;
After the damper is opened at the cooling angle, if the detected temperature of the refrigerating compartment is below the second reference temperature lower than the first reference temperature, the opening angle of the damper is reduced to a delay angle smaller than the cooling angle. step;
After reducing the opening angle of the damper, a control unit determines the opening angle of the damper according to the temperature of the refrigerating compartment, and allowing the determined opening angle to open the damper,
The delay angle is an angle greater than 0,
The control unit controls the refrigerator to control the opening angle of the damper while maintaining the damper in an open state while the compressor is operated so that the temperature of the refrigerating compartment is maintained within the first and second reference temperature ranges. method. cabinets with storage compartments;
a compressor operating to cool the storage compartment;
A fan for circulation of cold air in the storage compartment;
a fan motor for rotating the fan; and
It includes a control unit that controls the fan and fan motor,
The control unit adjusts the temperature of the storage compartment within a range between a first reference temperature that is higher than the target temperature of the storage compartment and a second reference temperature that is lower than the target temperature while one or more of the compressor and the fan motor are continuously operated. adjusting the output of one or more of the compressor and the fan motor to maintain
A refrigerator in which at least one of the compressor and the fan motor does not stop and operates continuously even if the target temperature of the storage compartment is below the second reference temperature. According to claim 33,
When the temperature of the storage compartment reaches the second reference temperature while the compressor is operating, the control unit controls the compressor to operate with a delay output higher than the minimum output. According to claim 34,
When the temperature of the storage compartment reaches a predetermined temperature while the compressor is operating at an output higher than the minimum output, the control unit adjusts the initial cooling output of the compressor or a cooling output lower than the initial cooling output. A refrigerator that operates the compressor. A cabinet containing a freezer and a refrigerator;
a compressor operating to cool the freezer;
a fan for circulating cold air in the freezer;
a damper located on a flow path that guides cold air from the freezer compartment to the refrigerator compartment; and
It includes a control unit that controls the opening angle of the damper,
The control unit operates the compressor and opens the damper to maintain the temperature of the refrigerating compartment within a range between a first reference temperature that is higher than the target temperature of the refrigerating compartment and a second reference temperature that is lower than the target temperature. Adjust the opening angle,
A refrigerator in which the damper remains open even if the target temperature of the refrigerating compartment is below the second reference temperature. According to claim 36,
When the temperature of the refrigerating compartment reaches the second reference temperature during the operation of the compressor, the control unit controls the opening angle of the damper so that the opening angle of the damper is greater than the minimum angle greater than 0. A refrigerator that does. According to clause 37,
When the temperature of the refrigerating compartment reaches a predetermined temperature while the opening angle of the damper is greater than the minimum angle, the control unit opens the damper to the maximum angle or a cooling angle smaller than the maximum angle. A refrigerator that controls the opening angle of the damper as much as possible.

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