KR20210026836A - Refrigerator and method for controlling operation of the same - Google Patents

Abstract

The present invention relates to a refrigerator and a method for controlling operation of the same. Moreover, according to an embodiment of the present invention, the method for controlling operation of the refrigerator comprises: a step of determining whether turbulence occurs in the refrigerator; a step of selecting driving one between a first PI controller and a second PI controlled based on a determination result; and a step of controlling cooling power of a compressor disposed inside the refrigerator based on a selection result. The first PI controller periodically generates a cooling power command on the compressor, and the second PI controller non-periodically generates the cooling power command on the compressor.

Description

Refrigerator and refrigerator operation control method {REFRIGERATOR AND METHOD FOR CONTROLLING OPERATION OF THE SAME}

The present invention relates to a refrigerator and a method for controlling the operation of the refrigerator.

A refrigerator is a device capable of storing food fresh for a certain period of time by cooling a freezer compartment or a refrigerator compartment to a specific temperature while repeating a freezing or refrigeration cycle. In general, a refrigerator includes a main body forming a storage space (or storage room) and a refrigerator door opening or closing the storage space. Storage spaces such as food are stored in the storage space, and the user may open the refrigerator door to store the storage or to retrieve the stored storage.

Such a refrigerator is a home appliance that stores food at a low temperature, and it is essential that the storage space is always maintained at a constant low temperature.

In general, refrigerators control turn-on and turn-off of the compressor (i.e., control the compressor in an intermittent operation mode) to maintain the internal temperature (i.e., the temperature of the storage space) at a constant level. do.

However, when the compressor is controlled by the corresponding method, there is a problem that the temperature change width of the storage space increases, the freshness of the food stored in the storage space decreases, and the driving start and stop of the compressor are repeatedly performed. There is also a problem that the power consumption increases when the power is restarted.

However, recently, as the low cooling power efficiency of the compressor has improved, a refrigerator that maintains the internal temperature at a constant level through cooling power control while the compressor is always turned on without turning off (i.e., the compressor is controlled in a continuous operation mode). Was developed.

For example, Korean Laid-Open Patent Publication No. 10-2019-0005033 (2019.01.15.) discloses a control method for driving a compressor of a refrigerator in a continuous operation mode.

Here, referring to FIG. 1, a method for controlling cooling power of a compressor of a refrigerator is shown in the related art. With reference to this, a method of controlling cooling power of a compressor in a refrigerator will be described.

For reference, FIG. 1 is a view shown in Korean Patent Application Publication No. 10-2019-0005033 (2019.01.15.).

Specifically, referring to FIG. 1, in a conventional refrigerator, the cooling power of the compressor is controlled so that the temperature of the storage compartment is maintained within a temperature satisfaction section (a temperature section set based on a target temperature).

However, in the case of a conventional refrigerator, a periodic control technique for controlling the cooling power of the compressor is applied based on an instantaneous error value (i.e., the difference between the temperature of the previous storage room and the temperature of the current storage room). There is a problem in that it is difficult to control the average temperature in a refrigerator equipped with multiple spaces.

In other words, if the cooling power of the compressor is controlled in the same way even in the case of a disturbance (e.g., starting a defrosting operation or opening a refrigerator door), the rate of decrease in the interior temperature is slowed, which adversely affects the long-term storage of food. Can give.

For this reason, there is a growing need to develop a compressor cooling power control algorithm capable of quickly stabilizing the internal temperature even when a disturbance occurs.

An object of the present invention is to provide a refrigerator and a method for controlling the operation of the refrigerator for efficiently controlling the average temperature in a refrigerator having multiple spaces.

The object of the present invention is not limited to the above-mentioned object, and other objects and advantages of the present invention that are not mentioned can be understood by the following description, and will be more clearly understood by examples of the present invention. In addition, it will be easily understood that the objects and advantages of the present invention can be realized by the means shown in the claims and combinations thereof.

In the method of controlling the operation of a refrigerator and a refrigerator according to the present invention, the cooling power control method of the compressor is dualized according to whether or not an external disturbance occurs, thereby effectively controlling the average temperature in a refrigerator having multiple spaces.

Specifically, the method of controlling the operation of a refrigerator according to an embodiment of the present invention is a step of determining whether or not a disturbance has occurred in the refrigerator, and selecting one of the first PI controller and the second PI controller to start driving based on the determination result. And controlling the cooling power of the compressor disposed inside the refrigerator based on the selection result and the first PI controller periodically generating a cooling power command for the compressor, and the second PI controller non-periodically to the compressor. Generates a command for cold power.

In addition, the refrigerator according to an embodiment of the present invention is installed in the main body in which the freezing chamber and the refrigerating chamber are formed, the evaporator that generates cool air through heat exchange between the refrigerant and air, and is mounted inside the main body, and passes through the evaporator A compressor that compresses one refrigerant to change it into a high-temperature and high-pressure gas, a first PI controller that periodically generates a cooling power command for the compressor, and a second PI controller that aperiodically generates a cooling power command for the compressor, and disturbance. The main control unit that selectively drives the first and second PI controllers based on the occurrence of occurrence, the compressor control unit that controls the cooling power of the compressor based on the cooling power command received from any one of the first and second PI controllers, and is installed in the freezer compartment A refrigerator compartment temperature sensor that measures the temperature of the refrigerator and provides information on the measured temperature of the freezing compartment to the main control unit, and a refrigerator compartment that measures the temperature of the refrigerator compartment by being installed in the refrigerator compartment, and provides information about the measured temperature of the refrigerator compartment to the main control unit. Includes a temperature sensor.

In the method of controlling the operation of a refrigerator and a refrigerator according to the present invention, by efficiently controlling the average temperature in a refrigerator having multiple spaces, it is possible to quickly stabilize the internal temperature when a disturbance occurs.

In addition to the above-described effects, specific effects of the present invention will be described together with explanation of specific matters for carrying out the present invention.

1 is a graph illustrating a method of controlling cooling power of a compressor of a conventional refrigerator.
2 is a diagram illustrating a refrigerator according to an exemplary embodiment of the present invention.
3 is a block diagram illustrating a control flow related to the operation of the refrigerator of FIG. 2.
4 is a graph further explaining FIG. 3.
5 is a diagram illustrating a method of controlling a continuous operation mode of the refrigerator of FIG. 2.
6 is a flowchart illustrating a method of controlling cooling power of a compressor of the refrigerator of FIG. 2.

The above-described objects, features, and advantages will be described later in detail with reference to the accompanying drawings, and accordingly, a person of ordinary skill in the art to which the present invention pertains will be able to easily implement the technical idea of the present invention. In describing the present invention, if it is determined that a detailed description of a known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, a detailed description will be omitted. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar elements.

Hereinafter, the "top (or bottom)" of the component or the "top (or bottom)" of the component means that an arbitrary component is arranged in contact with the top (or bottom) of the component. In addition, it may mean that other components may be interposed between the component and any component disposed on (or under) the component.

In addition, when a component is described as being "connected", "coupled" or "connected" to another component, the components may be directly connected or connected to each other, but other components are "interposed" between each component. It is to be understood that "or, each component may be "connected", "coupled" or "connected" through other components.

Hereinafter, a refrigerator 1 according to an exemplary embodiment of the present invention will be described with reference to FIGS. 2 to 4.

2 is a diagram illustrating a refrigerator according to an exemplary embodiment of the present invention. 3 is a block diagram illustrating a control flow related to the operation of the refrigerator of FIG. 2. 4 is a graph further explaining FIG. 3.

First, referring to FIG. 2, in the main body 50 of the refrigerator 1 according to an embodiment of the present invention, a storage compartment, that is, a freezing compartment 52 and a refrigerating compartment ( 54) is formed. In front of the freezing compartment 52 and the refrigerating compartment 54, a refrigerator door, that is, a freezer door 62 and a refrigerating compartment door 64, is provided with a main body 50 and a hinge so that the freezer compartment 52 and the refrigerating compartment 54 can be opened and closed, respectively. Are combined.

On the other hand, inside the main body 50, an evaporator 200 that generates cool air through heat exchange between a refrigerant and air, and a defrost heater 250 that emits heat to remove frost generated on the surface of the evaporator 200. ), and a compressor 150 that compresses the refrigerant that has passed through the evaporator 200 to convert it into a high-temperature and high-pressure gas, and introduces the air that has passed through the evaporator 200 into the freezing chamber 52 or the refrigerating chamber 54. A storage room fan 170 for condensing the refrigerant compressed by the compressor 150 through heat dissipation and a condenser 160 are installed.

In addition, inside the main body 50, a main control unit (300 in FIG. 3) that controls the overall operation of the refrigerator 1 and various parts (ie, various parts described above and later), and the cooling power of the compressor 150 The compressor control unit (330 in FIG. 3) for controlling the, is disposed on one side of the evaporator 200 to measure the surface temperature of the evaporator 200, and transmits the measured surface temperature to the main control unit (300 in FIG. 3). The defrost temperature sensor 270 and the internal air temperature sensor 101 that measures the temperature of the storage chamber and provides the measured temperature to the main control unit (300 in FIG. 3); for reference, the internal air temperature sensor 101 includes the freezing chamber 52 ), and measuring the temperature of the freezing compartment temperature sensor 102 and the refrigerating compartment 54 providing information on the measured temperature of the freezing compartment 52 to the main control unit (300 in FIG. 3), and the measured refrigerating compartment A refrigerating compartment temperature sensor 104 that provides information on the temperature of 54 to the main control unit (300 in FIG. 3) and the like are further mounted.

With this configuration, when the storage compartment fan 170 rotates, the air inside the freezing compartment 52 or the refrigerating compartment 54 flows into the evaporator 200, and the air introduced into the evaporator 200 flows into the evaporator 200. It is cooled while passing through, and the cooled air is provided into the freezing compartment 52 or the refrigerating compartment 54 by the storage compartment fan 170.

For reference, the temperature of the refrigerating compartment 54 may be controlled by the operation of the storage compartment fan 170 (ie, turn-on and turn-off operations), and the temperature of the freezing compartment 52 is It can be controlled by the operation of the storage room fan 170 and the compressor 150.

Here, the main control unit (300 in FIG. 3) includes, for example, a microprocessor, and controls overall operation, and details thereof will be described later.

On the other hand, outside of the main body 50, the outside temperature and humidity (that is, the outside temperature and humidity of the main body 50) are measured, and information on the measured outside temperature and humidity is stored in the main control unit (300 in FIG. 3). An outdoor temperature and humidity sensor 100 that transmits to) is mounted.

For reference, although FIG. 2 illustrates a side by side type refrigerator in which the refrigerating chamber 54 and the freezing chamber 52 are arranged left and right, the present invention is not limited thereto. That is, the present invention can be applied to a top mount type refrigerator in which a freezing chamber is disposed above the refrigerating chamber, a bottom freezer type refrigerator in which a refrigerating chamber is provided above and a freezing chamber is provided below. .

Next, referring to FIGS. 3 and 4, a control flow related to the operation of the refrigerator 1 of FIG. 2 is illustrated.

Specifically, the main control unit 300 includes a first PI controller 310 that periodically generates a cooling power command for the compressor 150, and a second PI controller that non-periodically generates a cooling power command for the compressor 150 ( 320), and may selectively drive the first and second PI controllers 310 and 320 based on whether or not the disturbance occurs.

In addition, when the main control unit 300 receives temperature information from the freezing chamber temperature sensor 102 or the refrigerating chamber temperature sensor 104, the corresponding temperature information is also transmitted to the first PI controller 310 or the second PI controller 320. I can.

For reference, the compressor controller 330 may control the cooling power of the compressor 150 based on a cooling power command provided from any one of the first and second PI controllers 310 and 320.

In addition, the main control unit 300 may determine whether or not a disturbance has occurred in the main body 50.

Here, the disturbance may mean, for example, the start of a defrosting operation or a sudden increase in the interior temperature due to the opening of the refrigerator door.

That is, the main controller 300 is in charge of controlling the defrost heater 250, so that it is possible to immediately determine whether the defrost operation is started, and to detect whether the refrigerator doors 62 and 64 are open. When the doors 62 and 64 are open, it can be determined immediately.

In this way, when it is determined that the disturbance has occurred in the main body 50, the main control unit 300 may start driving the first PI controller 310.

In addition, when the driving of the first PI controller 310 is started, the main controller 300 may determine whether a command generation period of the first PI controller 310 has arrived.

Here, the first PI controller 310 generates a cooling power command for the compressor 150 at the same time interval (i.e., generates a cooling power command every constant command generation period (for example, T1, T2, T3 are the same)) can do.

Specifically, the first PI controller 310 is driven to quickly stabilize the internal temperature in the event of a disturbance, and the command generation period of the first PI controller 310 may be shorter than the command generation interval of the second PI controller 320. have. Of course, since the second PI controller 320 generates a command aperiodically, it does not generate a cooling power command according to a predetermined command generation period. However, since the second PI controller 320 corresponds to a controller that is driven during a general cooling operation in which no disturbance occurs, it does not generate a cooling command in order to abruptly lower the interior temperature. Accordingly, the second PI controller 320 may generate the cooling power command based on a relatively longer time interval than the command generation period of the first PI controller 310.

On the other hand, when the command generation cycle of the first PI controller 310 has arrived, the main control unit 300 determines whether the current temperature detected by the freezing chamber temperature sensor 102 is less than or equal to the preset freezing chamber satisfaction temperature, and the determination result Based on the driving of the first PI controller 310 may be controlled.

Specifically, when it is determined that the current temperature sensed by the freezing chamber temperature sensor 102 is less than or equal to the preset freezing chamber satisfaction temperature, the main controller 300 ends the driving of the first PI controller 310, and the second PI controller ( 320) can be started.

That is, when the current temperature sensed by the freezing compartment temperature sensor 102 is less than or equal to the preset freezing compartment satisfaction temperature, it may mean that the current temperature of the freezing compartment 52 has entered the freezing compartment temperature satisfaction section. Furthermore, the fact that the current temperature of the freezing compartment 52 has entered within the freezer temperature satisfaction section means that the current temperature of the freezer compartment 52 has entered within the stable section, which may mean that the disturbance has been resolved.

Accordingly, the first PI controller 310, which was put in to resolve the disturbance (that is, to quickly stabilize the internal temperature that has risen rapidly), is no longer required, and the driving of the first PI controller 310 is terminated, The driving of the second PI controller 320 is started.

Here, the preset freezing chamber satisfaction temperature indicates the upper limit temperature of the preset freezing chamber temperature satisfaction section, and the preset freezing chamber temperature satisfaction section is a section set based on the target temperature of the freezing chamber 52 (that is, the target temperature of the freezing chamber 52). ±α; indicates the target temperature of the freezing chamber 52 + α = the upper limit temperature in the section satisfying the freezing chamber temperature).

On the other hand, when it is determined that the current temperature detected by the freezing chamber temperature sensor 102 is higher than the preset freezing chamber satisfaction temperature, the first PI controller 310 generates a new cooling power command based on the preset continuous operation mode control logic. can do.

For reference, details of the continuous operation mode control logic for generating the cooling power command will be described later.

Meanwhile, when it is determined that the disturbance has not occurred in the main body 50, the main controller 300 may determine whether to start driving the second PI controller 320 based on the driving state of the first PI controller 310.

Specifically, when the first PI controller 310 is driven while it is determined that no disturbance has occurred in the refrigerator 1, the main controller 300 maintains the driving state of the first PI controller 310, and 2 PI controller 320 may not start driving.

That is, in this case, the main controller 300 maintains the driving state of the first PI controller 310, but when it is determined that the current temperature sensed by the freezing chamber temperature sensor 102 is less than or equal to the preset freezing chamber satisfaction temperature, the first The driving of the PI controller 310 may be stopped and the driving of the second PI controller 320 may be started.

On the other hand, when the first PI controller 310 is not driven while it is determined that no disturbance has occurred in the refrigerator 1, the main controller 300 may start driving the second PI controller 320. have.

In addition, when the driving of the second PI controller 320 is started, the main controller 300 may determine whether the current temperature sensed by the refrigerating compartment temperature sensor 104 is the same as the preset refrigerating compartment satisfaction temperature.

In addition, when the current temperature detected by the refrigerating compartment temperature sensor 104 is the same as the preset refrigerating compartment satisfactory temperature, the main control unit 300 provides information on the average temperature of the freezing compartment measured during the previous operation cycle from the freezing compartment temperature sensor 102. I can receive it.

Here, the main control unit 300 may set each time point at which the current temperature sensed by the refrigerator compartment temperature sensor 104 is equal to the preset refrigerating compartment satisfaction temperature as a cooling power command generation time point.

That is, each time point at which the current temperature sensed by the refrigerator compartment temperature sensor 104 becomes equal to the preset refrigerating compartment satisfaction temperature is not constantly repeated, but varies according to the temperature change trend of the refrigerator compartment 54, and the second PI controller The cooling power command generation time point (or the cooling power command generation period) of 320 may also be variable (ie, aperiodic; for example, TA, TB, TC, and TD are different from each other).

In addition, the operation cycle refers to a cycle of refrigeration, refrigeration, and pump down (refrigerant recovery) of the refrigerator 1, and the unit time of each cycle may vary according to the temperature change of the refrigerating chamber 54. . In addition, the time required to perform one driving cycle may be synchronized with a time interval between the above-described time points (ie, a time point at which the current temperature sensed by the refrigerator compartment temperature sensor 104 becomes equal to the preset refrigerating compartment satisfactory temperature).

In addition, the preset refrigerating compartment satisfaction temperature refers to the lower limit temperature of the pre-set refrigerating compartment temperature satisfaction section, and the preset refrigerating compartment temperature satisfaction section is a section set based on the target temperature of the refrigerating compartment 54 (i.e., the target temperature of the refrigerating compartment 54 ± α ; The target temperature of the refrigerating chamber 54-α = the lower limit temperature of the section satisfying the refrigerating chamber temperature).

For this reason, the fact that the main control unit 300 is provided with information on the average temperature of the freezing compartment measured during the previous operation cycle from the freezing compartment temperature sensor 102 means that the main control unit 300 receives the “refrigerating compartment temperature sensor” from the freezing compartment temperature sensor 102. It may mean that information on the average temperature of the freezing compartment measured by the freezing compartment temperature sensor 102 is provided during a driving cycle immediately before the point in time when the current temperature sensed at 104 becomes equal to the preset refrigerating compartment satisfaction temperature.

Meanwhile, the second PI controller 320 may newly generate a cooling power command based on a preset continuous operation mode control logic using the average temperature of the freezing compartment measured during the previous operation cycle.

For reference, the control logic in which the second PI controller 320 generates the cooling power command is the same as the control logic in which the first PI controller 310 generates the cooling power command. Details on will be described later.

When the cooling power command for the compressor 150 is newly generated through such a process, the compressor control unit 330 receives the newly generated cooling power command from any one of the first and second PI controllers 310 and 320, The cooling power of the compressor 150 may be controlled based on the provided cooling power command.

For reference, the first PI controller 310 or the second PI controller 320 generates a new cooling power command through the continuous operation mode control logic (i.e., <Equation 1> to <Equation 4>) described below (i.e., Deciding the cooling power value of the current command generation cycle), let's take a look at this.

<Equation 1>

<Equation 2>

<Equation 3>

<Equation 4>

는 현재 냉력 지령 생성 주기(참고로, 제1 PI 제어기(310)의 경우, 냉력 지령 생성 주기가 일정하지만, 제2 PI 제어기(320)의 경우, 냉력 지령 생성 주기가 저장실의 온도 변화 추이에 따라 가변적임)의 냉력값을 의미하고,

은 이전 냉력 지령 생성 주기의 냉력값을 의미하며,

는 비례 제어 이득값을 의미하고,

는 적분 제어 이득값을 의미하며,

는 현재 냉력 지령 생성 주기의 에러값을 의미하고,

은 이전 냉력 지령 생성 주기의 에러값을 의미한다. 그리고

는 저장실(예를 들어, 냉동실(52))의 목표 온도를 의미하고,

는 내기 온도 센서(101)에 의해 측정된 저장실의 평균 온도(예를 들어, 냉동실 온도 센서(102)에 의해 측정된 냉동실(52)의 평균 온도)를 의미한다.From here,

Is the current cooling power command generation period (for reference, in the case of the first PI controller 310, the cooling power command generation period is constant, but in the case of the second PI controller 320, the cooling power command generation period is Variable),

Means the cold power value of the previous cold power command generation cycle,

Means the proportional control gain value,

Means the integral control gain value,

Means the error value of the current cooling power command generation cycle,

Denotes the error value of the previous cooling power command generation cycle. And

Denotes the target temperature of the storage compartment (for example, the freezing compartment 52),

Denotes the average temperature of the storage compartment measured by the internal air temperature sensor 101 (eg, the average temperature of the freezing compartment 52 measured by the freezing compartment temperature sensor 102).

That is, the first PI controller 310 or the second PI controller 320 may generate a new cooling power command through the above-described control logic.

)에 계산된 냉력값 변화량(

)을 합산하여 현재 냉력 생성 주기의 냉력값(

)을 산출한다. 즉, 제1 PI 제어기(310) 또는 제2 PI 제어기(320)는 현재 냉력 생성 주기의 냉력값(

) 산출시, 적분기 누적 없이 증가분만 반영한다. 또한, 냉장고 응답 속도 및 이득값 선정의 복잡성을 고려하여 미분 제어는 전술한 제어 로직에서 제외된다. Specifically, the first PI controller 310 or the second PI controller 320 calculates the amount of change in the cooling power value, and then the cooling power value of the previous cooling power generation period (

The amount of change in the calculated cooling power value (

) By summing the current cooling power generation cycle (

) Is calculated. That is, the first PI controller 310 or the second PI controller 320 is the cooling power value of the current cooling power generation period (

) When calculating, only the increment is reflected without accumulating integrators. In addition, the differential control is excluded from the above-described control logic in consideration of the refrigerator response speed and the complexity of selecting a gain value.

Here, referring to FIG. 5, a specific example of the above-described control logic is shown. With reference to FIG. 5, the above-described control logic will be described.

5 is a diagram illustrating a method of controlling a continuous operation mode of the refrigerator of FIG. 2.

Referring to FIG. 5, when the continuous operation mode control logic is started, first, an average temperature measurement step may be performed.

In this step, the first PI controller 310 or the second PI controller 320 transmits information on the average temperature of the freezing chamber measured by the freezing chamber temperature sensor 102 at each cooling power command generation cycle from the freezing chamber temperature sensor 102. Can be provided.

After the average temperature measurement step, an error detection step may be performed.

In this step, the first PI controller 310 or the second PI controller 320 detects, as an error value, the deviation between the target temperature of the freezing chamber and the average temperature of the freezing chamber measured by the freezing chamber temperature sensor 102 in the previous cooling power command generation cycle. can do.

After the error detection step, a gain value reflection step may proceed.

In this step, the first PI controller 310 or the second PI controller 320 may determine the amount of change in the cooling power value by reflecting the gain value to the detected error value.

After the step of reflecting the gain value, the step of determining the cooling power may proceed.

In this step, the first PI controller 310 or the second PI controller 320 may determine the cooling power value of the current cooling power command generation period by reflecting the change in the cooling power value determined in the previous step to the cooling power value of the previous cooling power command generation cycle. have.

In this way, the first PI controller 310 or the second PI controller 320 may generate a new cooling power command through the above-described four-step continuous operation mode control logic, and the compressor control unit 330 may generate a new cooling power command. The cooling power of the compressor 150 can be controlled based on the command.

As described above, the refrigerator 1 according to the embodiment of the present invention has the above-described configuration and characteristics. Hereinafter, a method of controlling the cooling power of the compressor of the refrigerator 1 of FIG. 2 will be described with reference to FIG. 6.

6 is a flowchart illustrating a method of controlling cooling power of a compressor of the refrigerator of FIG. 2.

3 and 6, it is determined whether or not a disturbance has occurred in the refrigerator 1 (S100).

Specifically, the main control unit 300 may determine whether or not a disturbance has occurred in the main body 50.

When it is determined that the disturbance has occurred in the refrigerator 1, the first PI controller 310 is started to drive (S150).

Specifically, when it is determined that the disturbance has occurred in the main body 50, the main control unit 300 may start driving the first PI controller 310.

In addition, when the driving of the first PI controller 310 is started (S150), it is determined whether the command generation period of the first PI controller 310 has arrived (S200).

Specifically, the first PI controller 310 may generate a cooling power command for the compressor 150 at the same time interval (ie, generate a cooling power command every constant command generation period).

For reference, the first PI controller 310 may determine by itself whether the command generation cycle has arrived.

On the other hand, when the command generation cycle has not arrived, the first PI controller 310 does not generate a new cooling power command until the command generation cycle arrives, and maintains the existing cooling power command, while the command generation cycle has arrived. In this case, the main control unit 300 determines whether the current temperature detected by the freezing chamber temperature sensor 102 is less than or equal to a preset freezing chamber satisfaction temperature (S220).

Specifically, when it is determined that the current temperature sensed by the freezing chamber temperature sensor 102 is less than or equal to the preset freezing chamber satisfaction temperature, the main controller 300 ends the driving of the first PI controller 310, and the second PI controller ( 320) may be started (S240).

In this way, when the driving of the second PI controller 320 is started, step S320 to be described later may proceed.

On the other hand, when it is determined that the current temperature detected by the freezing chamber temperature sensor 102 is higher than the preset freezing chamber satisfaction temperature, the first PI controller 310 generates a new cooling power command based on the preset continuous operation mode control logic. It can be done (S260).

When the cooling power command is newly generated (S260), the cooling power of the compressor 150 is controlled (S280).

Specifically, the first PI controller 310 provides the newly generated cooling power command to the compressor control unit 330, and the compressor control unit 330 may control the cooling power of the compressor 150 based on the received new cooling power command. .

When the cooling power of the compressor 150 is controlled by the new cooling power command, step S200 may be performed again.

On the other hand, when it is determined that no disturbance has occurred in the refrigerator 1, it is determined whether to start driving of the second PI controller 320 based on the driving state of the first PI controller 310 (S160).

Specifically, when it is determined that the disturbance has not occurred in the main body 50, the main control unit 300 may determine whether to start driving the second PI controller 320 based on the driving state of the first PI controller 310. .

That is, when the first PI controller 310 is driven while it is determined that no disturbance has occurred in the refrigerator 1, the main controller 300 maintains the driving state of the first PI controller 310, and the second Driving of the PI controller 320 may not be started.

In this case, step S200 may proceed.

On the other hand, when the first PI controller 310 is not driven while it is determined that no disturbance has occurred in the refrigerator 1, the main controller 300 may start driving the second PI controller 320. Yes (S300).

When the driving of the second PI controller 320 is started (S300), the main controller 300 sets the current temperature sensed by the refrigerator compartment temperature sensor 104 to a preset refrigerating compartment satisfaction temperature (that is, in the preset refrigerating compartment temperature satisfaction section). It may be determined whether it is the same as the lower limit temperature) (S320).

Specifically, when the current temperature sensed by the refrigerating compartment temperature sensor 104 is not the same as the preset refrigerating compartment satisfactory temperature, step S320 may be repeated.

On the other hand, when the current temperature sensed by the refrigerator compartment temperature sensor 104 is the same as the preset refrigerating compartment satisfaction temperature, the main controller 300 receives information on the average temperature of the freezing compartment measured during the previous operation cycle from the freezing compartment temperature sensor 102. Can be provided.

In addition, the second PI controller 320 may newly generate a cooling power command based on a preset continuous operation mode control logic using the average temperature of the freezing compartment (S340).

When the cooling power command is newly generated (S340), the cooling power of the compressor 150 is controlled (S360).

Specifically, the second PI controller 320 provides the newly generated cooling power command to the compressor control unit 330, and the compressor control unit 330 may control the cooling power of the compressor 150 based on the received new cooling power command. .

When the cooling power of the compressor 150 is controlled by the new cooling power command, step S320 may be performed again.

In this way, since the method of controlling the cooling power of the compressor 150 is performed, it is possible to quickly stabilize the internal temperature of the chamber efficiently even when a disturbance occurs.

As described above, the refrigerator 1 according to the exemplary embodiment of the present invention can quickly stabilize the internal temperature of the refrigerator when a disturbance occurs by efficiently controlling the average temperature of the refrigerator having multiple spaces.

As described above with reference to the drawings illustrated for the present invention, the present invention is not limited by the embodiments and drawings disclosed in the present specification, and various by a person skilled in the art within the scope of the technical idea of the present invention. It is obvious that transformations can be made. In addition, even if not explicitly described and described the effects of the configuration of the present invention while describing the embodiments of the present invention, it is natural that the predictable effects of the configuration should also be recognized.

102: freezer compartment temperature sensor 104: refrigerator compartment temperature sensor
150: compressor 170: storage compartment fan
300: main control unit 310: first PI controller
320: second PI controller 330: compressor control unit

Claims (20)

Determining whether a disturbance has occurred in the refrigerator;
Selecting one of the first PI controller and the second PI controller to start driving based on the determination result; And
Including the step of controlling the cooling power of the compressor disposed inside the refrigerator based on the selection result,
The first PI controller periodically generates a cooling power command for the compressor,
The second PI controller aperiodically generates a cooling power command for the compressor.
How to control the operation of the refrigerator.
The method of claim 1,
In the step of selecting to start driving of any one of the first PI controller and the second PI controller based on the determination result,
When it is determined that a disturbance has occurred in the refrigerator, the driving of the first PI controller is started.
How to control the operation of the refrigerator.
The method of claim 2,
When the driving of the first PI controller is started,
Controlling the cooling power of the compressor disposed inside the refrigerator based on the selection result,
Determining whether a command generation period of the first PI controller has arrived; and
When the command generation cycle has arrived, determining whether a current temperature sensed by a freezer temperature sensor provided in the refrigerator is less than or equal to a preset freezer satisfactory temperature; and
Controlling the driving of the first PI controller based on the determination result,
Including the step of controlling the cooling power of the compressor based on the control result
How to control the operation of the refrigerator.
The method of claim 3,
The command generation period of the first PI controller indicates a period in which the first PI controller newly generates a cooling power command,
The preset freezing chamber satisfaction temperature indicates the upper limit temperature of the preset freezing chamber temperature satisfaction section.
How to control the operation of the refrigerator.
The method of claim 3,
In the step of controlling the driving of the first PI controller based on the determination result,
When it is determined that the current temperature sensed by the freezing compartment temperature sensor is less than or equal to the preset freezing compartment satisfaction temperature, the driving of the first PI controller is terminated, and the driving of the second PI controller is started.
How to control the operation of the refrigerator.
The method of claim 3,
In the step of controlling the driving of the first PI controller based on the determination result,
When it is determined that the current temperature sensed by the freezing compartment temperature sensor is higher than the preset freezing compartment satisfaction temperature, the first PI controller newly generates the cooling power command based on a preset continuous operation mode control logic.
How to control the operation of the refrigerator.
The method of claim 1,
In the step of selecting to start driving of any one of the first PI controller and the second PI controller based on the determination result,
When it is determined that no disturbance has occurred in the refrigerator, whether to start driving of the second PI controller is determined based on the driving state of the first PI controller.
How to control the operation of the refrigerator.
The method of claim 7,
If the first PI controller is being driven while it is determined that no disturbance has occurred in the refrigerator, the driving state of the first PI controller is maintained, and the driving of the second PI controller is not started.
How to control the operation of the refrigerator.
The method of claim 7,
If the first PI controller is not being driven while it is determined that there is no disturbance in the refrigerator, the driving of the second PI controller is started.
How to control the operation of the refrigerator.
The method of claim 9,
When the driving of the second PI controller is started,
Controlling the cooling power of the compressor disposed inside the refrigerator based on the selection result,
Determining whether a current temperature sensed by a refrigerating compartment temperature sensor provided inside the refrigerator is equal to a preset refrigerating compartment satisfactory temperature;
When the current temperature sensed by the refrigerating compartment temperature sensor is the same as the preset refrigerating compartment satisfactory temperature, controlling the cooling power of the compressor based on the average temperature of the freezing compartment detected by a freezing compartment temperature sensor provided in the refrigerator,
The preset refrigerating compartment satisfaction temperature indicates a lower limit temperature of a pre-set refrigerating compartment temperature satisfaction section,
The freezing compartment average temperature indicates the average temperature of the freezing compartment measured during the previous operating cycle of the refrigerator.
How to control the operation of the refrigerator.
The method of claim 9,
In the step of controlling the cooling power of the compressor based on the average temperature of the freezing compartment,
The second PI controller newly generates the cooling power command based on a preset continuous operation mode control logic using the freezing chamber average temperature.
How to control the operation of the refrigerator.
A body in which a freezing chamber and a refrigerating chamber are formed;
An evaporator mounted inside the main body and generating cool air through heat exchange between a refrigerant and air;
A compressor mounted inside the main body and compressing the refrigerant passing through the evaporator to change it into a high-temperature and high-pressure gas;
A first PI controller that periodically generates a cooling power command for the compressor and a second PI controller that non-periodically generates a cooling power command for the compressor, and the first and second PI controllers based on whether a disturbance occurs. A main control unit selectively driving;
A compressor controller configured to control cooling power of the compressor based on a cooling power command provided from one of the first and second PI controllers;
A freezing compartment temperature sensor mounted in the freezing compartment to measure a temperature of the freezing compartment and providing information on the measured freezing compartment temperature to the main control unit; And
And a refrigerator compartment temperature sensor mounted in the refrigerating compartment to measure the temperature of the refrigerating compartment and to provide information on the measured temperature of the refrigerating compartment to the main control unit.
Refrigerator.
The method of claim 12,
The main control unit,
When it is determined that the disturbance has occurred in the main body, starting the driving of the first PI controller
Refrigerator.
The method of claim 13,
The main control unit,
When the driving of the first PI controller is started,
It is determined whether the command generation period of the first PI controller has arrived, and
When the command generation cycle has arrived, it is determined whether the current temperature detected by the freezing chamber temperature sensor is less than or equal to a preset freezing chamber satisfaction temperature,
Controlling the driving of the first PI controller based on the determination result
Refrigerator.
The method of claim 14,
The main control unit,
When it is determined that the current temperature sensed by the freezing compartment temperature sensor is less than or equal to the preset freezing compartment satisfaction temperature, the driving of the first PI controller is terminated and the driving of the second PI controller is started.
Refrigerator.
The method of claim 14,
The first PI controller,
When it is determined that the current temperature sensed by the freezing compartment temperature sensor is higher than the preset freezing compartment satisfaction temperature, the cooling power command is newly generated based on a preset continuous operation mode control logic.
Refrigerator.
The method of claim 12,
The main control unit,
When it is determined that the disturbance has not occurred in the main body, determining whether to start driving of the second PI controller based on the driving state of the first PI controller
Refrigerator.
The method of claim 16,
The main control unit,
When the first PI controller is driven while it is determined that no disturbance has occurred in the refrigerator, the driving state of the first PI controller is maintained, and the driving of the second PI controller is not started,
When the first PI controller is not driven while it is determined that no disturbance has occurred in the refrigerator, the second PI controller is started to be driven.
Refrigerator.
The method of claim 18,
The main control unit,
When the driving of the second PI controller is started,
It is determined whether the current temperature sensed by the refrigerator compartment temperature sensor is the same as a preset refrigerator compartment satisfaction temperature,
When the current temperature sensed by the refrigerating compartment temperature sensor is the same as the preset refrigerating compartment satisfactory temperature, information on the average temperature of the freezing compartment measured during the previous operation cycle is provided from the freezing compartment temperature sensor.
Refrigerator.
The method of claim 19,
The second PI controller newly generates the cooling power command based on a preset continuous operation mode control logic using the average temperature of the freezing compartment measured during the previous operation cycle.
Refrigerator.

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