KR20130023872A - Refrigerator and controlling method for the same - Google Patents

Abstract

PURPOSE: A refrigerator and a controlling method for the same are provided to save electric rates by a refrigerator by controlling electricity consumption according to the time zone of expensive or inexpensive electric rates. CONSTITUTION: A refrigerator comprises a compression unit(110), a condensation unit, a capillary unit, an evaporation unit, an ice storage unit, a fluid passage guide unit(108), an energy management device(30), and a refrigerator control unit(102). The compression unit compresses refrigerant. The condensation unit condenses the refrigerant passing through the compression unit. The capillary unit lowers the temperature and pressure of the refrigerant passing through the condensation unit. The evaporation unit vaporizes the refrigerant passing through the capillary unit. The ice storage unit is cooled by exchanging heat through conduction with the refrigerant which circulates on a refrigeration cycle. The fluid passage guide unit changes the fluid passage of the refrigerant. The energy management device performs an electric rates saving mode on the basis of electric information delivered from the outside. The refrigerator control unit controls the fluid passage guide unit and compression unit according to the electric information delivered from the energy management device. [Reference numerals] (102) Refrigerator control unit; (104) Room temperature sensor; (106) Cold storage temperature sensor; (108) Fluid passage guide unit; (110) Compression unit; (142) Ventilation fan; (30) Energy management device

Description

Refrigerator and Controlling Method {Refrigerator and Controlling Method for the same}

The present invention relates to a refrigerator, and more particularly, to a refrigerator capable of saving an electric charge.

In general, a refrigerator is used to freeze or refrigerate food, etc. The refrigerator comprises a case constituting a storage space divided into a freezer compartment and a refrigerating compartment, and a freezer cycle such as a compressor, a condenser, an evaporator, and a capillary tube to form a freezer compartment. It is configured to include devices to lower the temperature of.

One side of the case is equipped with a door for opening and closing the freezer compartment and the refrigerating compartment.

In the refrigerator having such a configuration, the compressor compresses the low-temperature low-pressure gaseous refrigerant to high temperature and high pressure, and the compressed high-temperature high-pressure gaseous refrigerant is cooled and condensed as it passes through the condenser to become a high-pressure liquid state. As the refrigerant passes through the capillary tube, its temperature and pressure are lowered, and the cooling operation is performed by a refrigeration cycle that takes heat from the surroundings and cools the air around it while changing to a low temperature low pressure gas state in the evaporator.

The refrigerator system used to date is generally a refrigerator that implements a refrigeration cycle regardless of the electricity bill used. In contrast, refrigerators have been developed that display information on the amount of electricity used, the electricity bill used, and the like. An example of such a device is a refrigerator in which power consumption and electric charges disclosed in Korean Patent Laid-Open Publication No. 2006-0128417 are displayed.

In recent years, since the rate of electricity has risen significantly, there is a need for development of an active refrigerator that can reduce the electric charge used in the refrigerator, unlike the prior art.

The present invention is to provide a refrigerator that can reduce the amount of electricity used when the electricity bill is expensive, and can reduce the electricity bill used by the refrigerator by operating normally when the electricity bill is low.

In addition, the present invention can provide a refrigerator that can store the cold air by using the cold storage unit, and supplies the cold air stored in the cold storage unit to the freezer compartment or the refrigerator compartment.

Furthermore, this invention can provide the refrigerator of the system which cools a heat storage part using conduction.

In addition, the present invention can be provided to the refrigerator supplied to the freezer compartment or the refrigerating chamber by the forced convection by the blowing fan, or by natural convection instead of the forced convection by the blowing fan.

The present invention relates to a refrigerating machine comprising a compression unit for compressing a refrigerant; A condenser for condensing the refrigerant passing through the compression unit; A capillary unit for lowering the temperature and pressure of the refrigerant passing through the condensing unit; An evaporator for evaporating the refrigerant passing through the capillary portion; A cold storage part configured to cool through heat exchange through conduction with a refrigerant circulating through a refrigeration cycle; A flow path guide part for changing a flow path of the refrigerant; And an energy management device configured to perform an electric charge saving mode for saving electric charges based on power information supplied from the outside, wherein the flow path guide unit and the compression unit are configured according to power information transmitted from the energy management device. It provides a refrigerator further comprising a refrigerator control unit for controlling.

The power information may relate to a power supply time at which an electric charge varies.

In particular, when the electric charge is relatively low, the refrigerator control unit may adjust the flow path guide unit to cool the internal cooling of the refrigerator or the storage unit.

The cold storage part may be disposed at a rear end of the evaporation part.

The flow guide may further include an auxiliary capillary unit including a first diverter valve for branching the refrigerant from the front of the capillary unit and lowering a temperature and a pressure of the refrigerant diverged from the first diverter valve.

The refrigerant passing through the auxiliary capillary portion and the refrigerant passing through the evaporation portion may be mixed or individually guided to the accumulator.

The flow guide may further include a bypass pipe having a second diverter valve for branching the refrigerant from the rear of the evaporator and for guiding the refrigerant diverged from the second diverter valve.

Based on the refrigeration cycle direction, the bypass pipe may be arranged in parallel with the heat storage.

Of course, the flow path guide portion further comprises a first capacitive valve which is provided with a first diverter valve for branching the refrigerant passing through the condensation unit; It is possible to be arranged at the rear end.

At this time, based on the refrigeration cycle direction, the cold storage unit may be disposed in parallel with the evaporator.

The refrigerant passing through the accumulator may be mixed with the refrigerant passing through the evaporator or individually guided to the compression unit.

Furthermore, the cold storage part may be attached to an inner case forming a predetermined space therein, and the cold storage part further includes a cold storage part for a refrigerator compartment installed in a cold compartment of the inner case, and a cold storage part for a freezer compartment installed in a freezer compartment of the inner case. It is possible to.

The present invention comprises the steps of determining whether the electric charge saving mode for the refrigerator is selected; And when the electric charge saving mode is selected, stopping the driving of the compression unit when the electric charge is relatively high, and cooling the inside of the refrigerator by using the cold air stored in the cold storage unit.

When the electricity rate saving mode is not selected or the electricity rate saving mode is selected, when the electricity rate is relatively low, a general operation step in which the compression unit is driven to supply cold air to the refrigerator or to store cold air in the cold storage part is performed. It is possible to be carried out.

Furthermore, in the general operation step, cold air may be selectively supplied into the refrigerator or cold air may be stored in the cold storage part.

At this time, in the general operation step, when the temperature of the cold storage portion is higher than the temperature setting of the cold storage portion, it is possible to adjust the flow path of the refrigerant so that relatively cool storage is made.

Even when the electric charge saving mode is selected, the compression unit may be driven when the temperature inside the refrigerator is greater than or equal to the threshold temperature.

According to the present invention, since the power usage can be controlled by dividing the time between the high cost and the low time, the electric charge generated by the refrigerator can be saved.

The method of cooling the phase change material included in the cold storage part of the present invention by conduction is useful when the amount of phase change material is large and the storage time is insufficient compared to the cooling time by the cold storage part. By conduction, heat exchange can be made directly, so that cold storage can be made more efficiently to the phase change material.

In addition, the cooling of the cold storage part by conduction may be applied when the disadvantage of the structural volume of the refrigerator is not exposed to the inside of the refrigerator or the internal volume decreases when exposed.

In the case of cooling by conduction, however, the melting point of the phase change material is low, and it may be used when the refrigeration is difficult due to indirect cooling by convection.

On the other hand, the method of cooling the cold air stored in the refrigerating unit to the inside of the refrigerator can be applied in various ways by using a direct cooling method using natural convection without using a blower fan and an indirect cooling method using forced convection using a blower fan. have.

The direct cooling method, which does not use a separate blower fan for generating forced convection in the cooling method, has an advantage of supplying cold air stored in the cold storage part to the refrigerator even when no power is supplied.

On the other hand, the indirect cooling method using the blower fan that generates forced convection in the cooling method has the advantage that there is no restriction on the location of the cold storage part because heat exchange can be sufficiently performed by convection even when the cold storage part is not exposed to the inside of the refrigerator. Has

1 is a schematic diagram of a smart grid.
2 is a schematic diagram of a power supply network system according to the present invention;
Figure 3 is a front view of the energy management device according to the present invention.
4 is a control block diagram of a power supply network system according to the present invention;
5 is a control block diagram of another embodiment of a power supply network system according to the present invention;
6 is a control flowchart illustrating a control method of a power supply network system according to the present invention.
7 is a graph showing the change in the amount of power consumed over time and the electricity bill.
8 is a block diagram of a refrigerator according to the present invention.
9 is a main configuration diagram according to the first embodiment of the present invention.
10 is a main configuration diagram according to a second embodiment of the present invention.
11 is a main configuration diagram according to a third embodiment of the present invention.
12 is a front sectional view of the refrigerator.
13 is a side cross-sectional view of the refrigerator.
14 is a flow chart of the overall control of the refrigerator according to the present invention;
FIG. 15 is a detailed control flowchart of cooling and internal cooling of a refrigerator in FIG. 14; FIG.
FIG. 16 is a detailed control flowchart of direct cooling of FIG. 14. FIG.
FIG. 17 is a detailed control flowchart of indirect cooling in FIG. 14. FIG.
18 shows the operational flow of components over time in the first embodiment;
19 shows the operational flow of the components over time of the second embodiment;
20 shows the operational flow of components according to the time of the third embodiment.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a schematic diagram of a smart grid, a smart grid includes a power plant that generates power through thermal power, nuclear power or hydropower, and a solar power plant and a wind power plant using solar or wind power as renewable energy. .

In addition, the thermal power plant or nuclear power plant or hydroelectric power station transmits power to a power station through a transmission line, and the power station sends electricity to a substation so that the electricity is distributed to a demand destination such as a home or an office.

The electricity produced by the renewable energy is also sent to substations to be distributed to each customer. The electricity transmitted from the substation is distributed to the office or each household via the power storage device.

Even in homes that use the Home Area Network (HAN), it is possible to supply electricity by producing electricity by itself through fuel cells mounted on solar power or PHEV (Plug-in Hybrid Electric Vehicle). The remaining electricity can also be sold outside.

In addition, the smart measuring device is installed in the office or home to identify the real-time power and electricity bills used at each demand source. Through this, the user recognizes the amount of electricity and the electricity bill currently used, and according to the situation, the power consumption or the electricity bill according to the situation. Measures to reduce the

On the other hand, since the power plant, power station, storage device and the source of demand are bidirectional communication, only the unilaterally receive electricity from the source of demand, and notify the storage, power station, and power plant of the demand source to produce electricity according to the situation of the source of demand. Electric distribution can be performed.

Meanwhile, in the smart grid, an energy management system (EMS), which is responsible for real-time power management and real-time prediction of power consumption, and an advanced metering infrastructure (AMI), which measures power consumption in real time, are pivotal. Play the role of person.

Here, the measuring device under the smart grid is a basic technology for integrating consumers on the basis of open architecture, and provides consumers with the ability to efficiently use electricity, and provides power providers with the ability to operate the system efficiently by detecting problems in the system. do.

Here, the open architecture, unlike a general communication network, refers to a standard that allows all electric devices to be connected to each other regardless of which manufacturer the electric device is manufactured in a smart grid system.

Thus, the instrumentation used in the smart grid enables a consumer friendly efficiency concept such as "Prices to Devices."

That is, the real-time price signal of the electric power market is relayed through the energy management device (EMS) installed in each home, and the energy management device (EMS) communicates with and controls each electric device so that the user can control the energy management device (EMS). By recognizing the power information of each electric device and performing the power information processing such as the amount of power consumption or the electric charge limit setting based on the power information, energy and cost can be saved.

The energy management device (EMS) is a local energy management device (EMS) used in the office or at home, and the local energy management device (EMS) by performing bidirectional communication to process the information collected from the local energy management device (EMS) It is preferably composed of a central energy management device (EMS).

Real-time communication of power information between suppliers and consumers in the smart grid enables real-time "real-time grid response," thus reducing the high cost of meeting peak demand.

2 illustrates a power supply network system 10 in a home, which is a major consumer of a smart grid.

The power supply network system 10 is connected to the measuring device (smart meter) 20 and the measuring device (smart meter) 20 that can measure the power and electricity rates supplied to each home in real time An energy management device (EMS) 30 is connected to a plurality of electrical devices, such as devices, and controls their operation.

Here, the electric charge is charged at an hourly rate, and the hourly electric charge is high in a time section in which the power consumption is rapidly increased, and the hourly electric charge is low at the same time as the late night time section, where the power consumption is relatively low.

The energy management device (EMS) 30 has a screen 31 for displaying the current state of electricity consumption and the external environment (temperature, humidity), and has an input button 32 or the like which can be operated by a user. It is preferably provided in the form of a terminal.

The energy management device (EMS) 30 is again an electrical appliance such as a refrigerator 101, a washing machine and a dryer 102, an air conditioner 103, a TV 105, or a cooking appliance 104 through a home network. It will be connected to, and bi-directional communication with them.

Communication inside the house can be via wireless or wired, such as a PLC.

In addition, it is preferable that the electrical appliances are arranged to be connected to other electrical appliances so that communication is possible.

FIG. 3 shows an embodiment of an energy management device (EMS) of the present invention, wherein the energy management device (EMS) takes the form of a terminal having a touch panel 33.

The touch panel 33 includes current energy information such as current electricity consumption, electricity charges, and estimated charges and carbon dioxide generation amount estimated by accumulated history, electricity charges of the current time interval, and electricity of the next time interval. A screen 31 is displayed on which the real-time energy information and the weather information including the rate and the time period in which the electric charge is changed are displayed.

In addition, the screen 31 of the touch panel 33 includes a graph showing the power consumption amount of each time period of each home appliance and its change, and a graph of the electricity rate trend for each time period disclosed in FIG. 6 may also appear.

One side of the screen 31 is provided with a button unit 32 that allows the user to set the operation of the electrical appliance, if necessary.

By using the button unit 32, the user can set a limit of the amount of electricity or electricity bill that he or she wants to use, and according to this setting, the energy management device (EMS) 30 can control the operation of each electric product. Will be.

FIG. 4 shows a control block diagram of a power supply network system that is in charge of power supply for a power supply under a smart grid and electrical appliances in a home.

Here, the power supply source may be a power company 50 having general power generation equipment (fire power, nuclear power, hydropower) or power generation equipment using renewable energy (solar, wind, geothermal) and the like. A self-photovoltaic facility 51 that can be provided in each home, and a fuel cell 52 that can be provided in a fuel cell vehicle or home.

This power supply source is connected to the measuring device (smart meter) 20, the measuring device (smart meter) 20 is connected to the energy management device (EMS) (30).

Here, in the configuration of the energy management device (EMS) 30, the control unit 35, the input unit 38, the communication unit 34, the display unit 39 and the clock or timer 40 is included.

The communication unit 34 communicates with electrical appliances in a home, that is, a refrigerator 101, a washing machine or a dryer 102, an air conditioner 103, a cooking appliance 104, and the like, and power information and driving thereof. It is responsible for transmitting and receiving information.

In the energy management device (EMS) 30, the control unit 35 is provided by the input unit 38, the setting information input by the user, the operation and power usage history information of the existing accumulated electrical appliances, and externally supplied. The amount of power is measured in real time and the information is processed in real time to control the operation of electrical appliances, and to control the power supplied to these electrical appliances.

In addition, the display unit 39 displays power information supplied from a power supply, or information regarding operation information and power information of an electric product.

The energy management device (EMS) 30 serves to control the operation of the electrical appliance, the biggest role is to provide an electrical charge saving mode that can save the electricity bill when the electrical appliance is operating. Here, the electricity rate saving mode is operated based on the information on the electricity rate, which depends on the time of operation of the electrical appliance.

 By using the clock or timer 40, the control unit 35 controls the current time interval to be a time interval in which the electric charge exceeds a predetermined criterion, that is, whether the first time interval or less than a predetermined criterion, that is, the second time interval. Determine if it is.

In addition, when the clock or timer 40 determines that the current time belongs to the first time interval, the clock or timer 40 also serves to inform how much time is left to enter the second time interval.

When the user sets the operation of the electrical appliance to use a predetermined electrical appliance, and tries to use the electrical appliance in its original setting mode, the energy management device (EMS) 30 has a current time of the first time. It is determined whether it is a time interval or a second time interval.

Thus, in the second time interval, the electrical appliance is operated in the original setting mode. By the way, if it is determined that the current time belongs to the first time period, the current time is displayed to the user that the electric charge is more than the predetermined standard per hour, and the electric charge is more than the standard, and the second electric charge can be saved. Provides information about time intervals.

In other words, how many hours are left to enter the second time period, and how much electricity charges can be saved by operating the electrical appliance in the original setting mode in the second time interval, so as to select the electrical products It is to enable the so-called selective control mode in which the operation in the electric charge saving mode is performed.

However, the user sets the energy management device (EMS) 30 in addition to saving the electric charge through the selection control mode, omitting the guidance for the second time period, and the current time is the first time. If it belongs to the time interval, it is possible to delay the operation of the electrical appliance in the original setting mode until the end of the first time interval.

In this way, when the current time belongs to the first time interval, the case where the operation of the electric product is forcibly controlled is called a forced control mode.

This means that if the user belongs to a category that is not sensitive to the electricity bill (for example, a child, adolescent, adult man, etc.), the user who is sensitive to the electricity bill (for example, housewife) is not preset to the electricity bill. This is in case the user can use it.

However, when the forced control mode is set, the operation of the refrigerator is delayed until the second time interval, or the execution of other operations is stopped except for the essential operation among the operations to be originally performed.

However, when the selection control mode is set in the energy management apparatus EMS in advance, the user may be notified of the operation mode related to the electric charge saving mode in advance so that the user may select such an operation mode.

When the forced control mode is set, the washing machine or the dryer and the refrigerator are forcibly switched to the electric charge saving mode.

As described above, although the electric charge saving mode is controlled by an energy management device (EMS) 30 provided independently of the electric product, the energy management device (EMS) 30 is detachable to the electric product. Or, it may be conceived that the electrical appliance performs the function of the energy management device (EMS) 30.

That is, as shown in Figure 5, such as the refrigerator 101 of the electrical appliance, the energy management device (EMS) 30 may be provided detachably to the electrical appliance that must be operated continuously for 24 hours.

Furthermore, the electric power saving mode can be performed by selecting a function corresponding to the function of the energy management device of the electric product to be used by the user by performing the function of such an energy management device (EMS) in each electric product. It may be.

That is, the control unit 35, the communication unit 34, the input unit 38, and the display unit 39 of the energy management device (EMS) 30 are provided separately from the control unit 101a of the electrical appliance. It is also conceivable to transmit / receive and process the operation signals and power information of all electrical appliances by means of 30).

Except for the installation position of the energy management device (EMS) 30 as described above, since the operation and function are the same as those made in Figure 4 will be omitted a detailed description.

6 is a control flowchart illustrating a control method of a power supply network system according to the present invention. A description with reference to FIG. 6 is as follows.

The user first sets for the operation of an electrical appliance such as a refrigerator (S11), and operates the energy management device (EMS) (S12).

In this case, the step of operating the energy management device (EMS) is typically provided independently of the electrical appliance to operate a separate terminal to communicate with the electrical appliance, as described above, the energy management device (EMS) provided in the electrical appliance It may also be applied to the case of operating a function corresponding to the function of).

In this state, it is determined whether the electric charge weak mode or the original operation set by the user originally selected (S13).

In this case, when the home state operation is selected (S19). The original set operation means that the operation set by the user is performed without consideration of the electric charge.

On the other hand, when the electricity rate saving mode is selected, it is determined whether the current time belongs to the first time period when the hourly electricity rate is more than a predetermined standard (S14), and if the current time does not belong to the first time period, the electrical appliance It operates as it is.

In the case of the first time period, as shown in the graph shown in FIG. 7, the electric time indicated by the thick solid line refers to the time period when the predetermined reference (S) or more.

If it is determined to belong to the first time interval, it is determined whether the selection control mode for operating the electricity rate saving mode by the user's selection or the forced control mode for executing the electricity rate saving mode regardless of the user's intention. (S15).

Here, when the forced control mode is selected, the electric charge saving mode is operated regardless of the user's intention (S17).

When operating in the electric charge saving mode, the operation of the electrical appliance during the first time period is prevented from operating in the original setting state that the user originally set. In other words, if it is in operation, it will stop or operate with less power consumption than the original power consumption.

It is determined whether the current time continues to belong to the first time period while the electric charge saving mode is in operation, and it is determined that a second time period has arrived where the electric charge falls below a predetermined criterion (see FIG. 7, S) beyond the first time period. In this case, the electrical appliance is operated to the original setting state (S609).

On the other hand, when the user selects the selection control mode in step S15, the information on the second time interval is provided (S16).

That is, it provides information on how much time is left until the second time period, or information on the electric charge in the second time period, and information on the difference in the electric charge in the first time period and the second time period. Thus, the user is guided in selecting the electric charge saving mode.

Then, when the current time is in the first time interval, when the electric charge saving mode is selected (S20), the operation of the electrical appliance according to the above-described electric charge saving mode is started (S17).

That is, if it is determined that it is economical for the user to select the electric charge saving mode in the first time period based on the information received in step S16, or if it is determined that the operation of the electric product is not urgent at the current time, In order to save electricity, you can select the electricity saving mode.

If the user does not select the electricity rate saving mode even when the user views the second time interval and the corresponding power rate information, the user operates as originally set (S19).

7 is a graph showing the change in the amount of power consumption and electricity bills over time. This will be described below with reference to FIG.

FIG. 7 illustrates the first time period and the second time period, and a criterion S for distinguishing them. In the first time section in which the hourly electric charge is equal to or greater than the reference price, the electric charge increases rapidly due to the law of supply and demand because the amount of electric power is used more than at other times.

In addition, since the use of electric power is relatively low in the second time period, the electric charge is relatively low. Therefore, it is economical for the user to refrain from using the power in the first time section and to use the power in the second time section.

The reference for the first time period and the second time period is flexible according to the criterion S, and the total power consumption graph (thin solid line) and the electric charge graph (bold solid line) also vary depending on the situation. .

It is preferable that the cold storage part applied in the present invention includes a phase change material therein. Phase change material refers to a material that can incorporate latent heat by changing phase as the temperature changes, and is called a PCM (Phase Change Material).

When installing a cold storage unit containing a phase change material in the refrigerator, a cold storage method of accumulating cold air energy in the cold storage unit and a cold cooling method of releasing cold air energy stored in the cold storage unit to the refrigerator should be considered.

The storage cooling method may be classified into a direct cooling method and an indirect cooling method, and the anti-cooling method may also be classified into a direct cooling method and an indirect cooling method.

First of all, there is a direct cooling method, that is, a method of installing a phase change material in a tube through which a refrigerant flows. In this case, heat exchange between the tube through which the refrigerant flows and the phase change material is conducted by conduction. This can be done.

In addition, a method of accumulating cold air energy in the cold storage part may include an indirect cooling method, that is, a method of using air as a medium when the evaporator and the phase change material exchange heat. In this case, heat exchange takes place by convection between the evaporator and the phase change material.

Direct cooling method and fan, which is a method of cooling cold energy in the cold storage part, by using a heat exchanger installed in the inside of a refrigerator, like a direct-cooling refrigerator, without using forced fan to generate cold air energy. It can be classified into indirect cooling method that generates forced convection using.

In the case of direct cooling, natural convection is used in the case of direct cooling, and therefore, it is preferable to be located above the inside of the refrigerator to be cooled for proper cooling in the refrigerator. When the phase change material is above the inside of the refrigerator, cold air supplied from the phase change material may be easily transferred to the lower part of the refrigerator.

On the other hand, in the case of the indirect cooling method, there is no restriction on the installation position of the cold storage unit, but there is a disadvantage that a certain level or more of power is required for driving the blower fan to generate forced convection. For reference, indirect cooling may be maintained uniformly in the high temperature because the convection is generated in the air by the blower fan, and the high in-temperature cooling performance may be superior because the heat exchange efficiency of contact with the phase change material is improved.

On the other hand, according to the presence or absence of the use of a heat exchanger to improve the heat exchange efficiency of the heat storage can be divided into direct and indirect. The direct type may refer to a method of performing heat exchange on the surface of the case accommodating the phase change material or the phase change material, and the indirect type may refer to a method of performing heat exchange on the heat exchanger using a separate heat exchanger.

8 is a block diagram of a refrigerator according to the present invention. A description with reference to FIG. 8 is as follows.

The energy management device 30 transmits information about a power supply time at which an electric charge varies, to the refrigerator control unit 102. That is, the refrigerator control unit 102 may provide the refrigerator control unit 102 with information about whether the current electric charge is relatively expensive or cheaper than the electric charge of another time.

In addition, the inside temperature sensor 104 detects the temperature inside the refrigerator, and the cold storage temperature sensor 106 detects the temperature of the cold storage portion and transmits the detected temperature value to the refrigerator control unit 102. The internal temperature sensor 104 is exposed to the inside of the refrigerator is installed to measure the temperature inside the refrigerator, the cold storage temperature sensor 106 is installed in contact with the cold storage it is possible to measure the temperature of the cold storage. Do.

The refrigerator control unit 102 may save the electric charge according to the information transmitted from the energy management device 30, whether the user has set the electric charge saving mode and whether the current charge is relatively cheap. To drive the refrigerator.

Meanwhile, the refrigerator control unit 102 turns off the blower fan 142 that generates air flow, and drives the compression unit 110 that circulates the refrigeration cycle. In addition, the refrigerator control unit 102 may control the flow path of the refrigerant using the flow path guide unit 108. The flow guide 108 may include a first diverter valve and a second diverter valve, which will be described later. The first diverter valve may be installed at the front end of the evaporator, and the second divert valve may be classified as being installed at the rear end of the evaporator.

In this case, the blower fan 142 may be installed adjacent to the cold storage part, and the blower fan 142 is preferably applied only when the cooling method of the cold storage part is an indirect cooling method. This is because the blowing fan 142 performs a function of generating an air flow for supplying the cold air of the cold storage part into the refrigerator.

In particular, the refrigerator control unit 102 may control the flow path guide unit 108 according to the power information transmitted from the energy management device 30. In this case, the power information may be related to a power supply time at which an electric charge varies. Specifically, the power information may be related to the first time period and the second time period related to FIG. 7.

9 is a main configuration diagram according to the first embodiment of the present invention. This will be described below with reference to FIG.

The refrigerator of the present invention includes a compression unit 110, a condensation unit 120, a capillary unit 130, and an evaporation unit 140 for implementing a basic refrigeration cycle, and a refrigeration cycle is performed using the corresponding components. The compression unit 110 compresses the refrigerant circulating through a refrigeration cycle, the condensation unit 120 condenses the refrigerant passing through the compression unit 110, and the capillary unit 130 is the condensation unit 120. Lowering the temperature and pressure of the refrigerant passing through the), the evaporator 140 performs a function of vaporizing the refrigerant passing through the capillary tube 130.

In the first embodiment according to FIG. 9, the heat storage unit 170 is disposed at the rear end of the evaporation unit 140. At this time, the rear end of the evaporator 140 refers to the movement direction of the refrigerant circulating in the refrigeration cycle, and means a position where the refrigerant moves after passing through the evaporator 140. That is, the refrigerant is moved to the cold storage unit 170 after passing through the evaporator 140.

The cold storage unit 170 may be installed in a space between the outer case and the inner case of the refrigerator, or may be directly exposed to food and the like stored inside the inner case and stored in the refrigerator.

According to FIG. 9, the refrigerant having passed through the compression unit 110, the condensation unit 120, the capillary unit 130, and the evaporation unit 140 is formed of the storage unit 170 or the storage unit 170. As it comes into contact with the case, the cold storage unit 170 is directly cooled.

The heat storage unit 170 is cooled by heat exchange through the conduction with the refrigerant circulating the refrigeration cycle. Since the cold storage unit 170 may be cooled by conduction through which energy is transferred by contact, cool air of the refrigerant may be smoothly transferred to the cold storage unit 170.

At this time, in order to increase the area where the heat exchange between the storage cooling unit 170 and the refrigerant pipe circulating the refrigeration cycle is bent in the shape of a ridge to increase the trajectory or to contact the outer side of the refrigerant pipe like a fin. It is possible to install a separate member that can increase the area.

Meanwhile, in the first embodiment, the first capillary valve 124 for branching the refrigerant from the front of the capillary tube 130 and the auxiliary capillary tube for lowering the temperature and pressure of the refrigerant branched from the first valve 124. 132 more. The first diverter valve 124 is installed between the capillary portion 130 and the condensation portion 120 in a passage through which the refrigerant moves, so that the refrigerant is in the capillary portion 130 or the auxiliary capillary portion 132. Select a moving path to be moved.

In this case, the auxiliary capillary portion 132 is disposed in parallel with the capillary portion 130 and the evaporator 140, and the refrigerant whose flow path is changed by the first direction switching valve 124 may be moved. .

Meanwhile, the refrigerant passing through the auxiliary capillary portion 132 and the refrigerant passing through the evaporator 140 may be mixed or individually guided to the heat storage unit 170. That is, the refrigerant passing through the auxiliary capillary unit 132 and the refrigerant passing through the capillary unit 130 and the evaporator 140 converge at the front end of the heat storage unit 170.

According to FIG. 9, when the first diverter valve 124 forms the flow path of the refrigerant into the capillary portion 130 (to the A position), the refrigerant passes through the capillary portion 130 and then the evaporation portion ( Vaporized at 140). After cooling of the inside of the refrigerator in the evaporator 140, the cold storage unit 170 may be cooled by using the remaining cold air.

On the other hand, when the first directional valve 124 forms the flow path of the coolant to the auxiliary capillary 132 (to the B position), the coolant passes immediately after passing through the auxiliary capillary 132. The cold storage unit 170 may be cooled by moving to 170. The first direction switching valve 124 may be controlled by the refrigerator control unit 102.

The flow path selection of the first direction switching valve 124 may be performed by supplying cool air to the inside of the refrigerator to lower the temperature of the refrigerator or supplying cold air to the cold storage unit 170 to store the cold air. It is therefore possible to determine. For example, when the temperature inside the refrigerator is sufficiently lowered, the first directional valve 124 forms a coolant flow path as the auxiliary capillary 132 to quickly cool the air in the storage unit 170. It is possible to charge.

On the other hand, in a situation in which cold air needs to be supplied to the refrigerator, the flow path of the refrigerant may be made of the capillary part 130 and the evaporator 140 in the first direction switching valve 124.

10 is a main configuration diagram according to a second embodiment of the present invention. A description with reference to FIG. 10 is as follows.

In the second embodiment, the second diverter valve 144 for branching the refrigerant from the rear of the evaporator 140 and the bypass pipe 146 for guiding the refrigerant diverged from the second diverter valve 144. It includes more. That is, based on the refrigeration cycle direction, the bypass pipe 146 is disposed in parallel with the heat storage section 170.

The second diverter valve 144 is disposed between the evaporator 140 and the cool storage 170 in a passage through which the coolant moves, and the coolant passed through the evaporator 140 receives the coolant ( 70) select whether or not to pass. When the refrigerant passes through the cold storage unit 170 (B position), the cold storage unit 170 may be cooled, and when the flow path is changed to the bypass pipe 146 (A position), the cold storage unit 170 is not cooled.

For example, when the cold storage unit 170 needs to be cooled, the second direction switching valve 144 directs the flow path of the coolant toward the cold storage unit 170. This case may be performed when sufficient cold air is not stored in the heat storage unit 170.

On the other hand, when the cold storage unit 170 does not need to be cooled, that is, when the cold storage unit 170 is sufficiently cooled, the second direction switching valve 144 passes the refrigerant passage through the bypass pipe 146. Can be turned to In this case, since the refrigerant moves directly to the compression unit 110 without passing through the heat storage unit 170, a conventional refrigeration cycle may be implemented.

11 is a main configuration diagram according to a third embodiment of the present invention. This will be described below with reference to FIG.

In the third embodiment according to FIG. 11, a first capacitive valve 124 in which the refrigerant passing through the condenser 120 is branched, and an auxiliary capillary tube 132 installed at the rear of the first diverter valve 124 are provided. More). At this time, the cold storage unit 170 may be disposed at the rear end of the auxiliary capillary tube 132.

Based on the direction of the refrigeration cycle, the capillary portion 130 and the evaporator 140 is disposed in parallel with the auxiliary capillary portion 132 and the cold storage section 170. The refrigerant passing through the capillary unit 130 and the evaporator 140 may converge at the rear end of the refrigerant passing through the auxiliary capillary unit 132 and the heat storage unit 170.

According to FIG. 11, the refrigerant circulating in the refrigerating cycle may select a flow path of the refrigerant from the capillary portion 130 or the auxiliary capillary portion 132 in the first direction switching valve 124. When the flow path of the refrigerant is selected as the capillary unit 130 (A position), since the refrigerant moves to the evaporator 140, the inside of the refrigerator may be cooled.

On the other hand, when the flow path is selected as the auxiliary capillary 132 (B position), since the refrigerant moves to the cold storage unit 170, the cold storage unit 170 may be cooled to perform cold storage. Of course, when the cold storage unit 170 is located inside the refrigerator, the inside of the refrigerator may be cooled together while the cold storage unit 170 is cooled. However, when the coolant moves to the heat storage unit 170, the cooling efficiency of the inside of the refrigerator may be lower than that of the coolant moves to the evaporator 140.

When the main purpose is to lower the temperature inside the refrigerator, the first diverter valve 124 moves the refrigerant to the evaporator 140, and the temperature inside the refrigerator is sufficiently lowered to reduce the temperature of the refrigerator. When it is necessary to store cold air in 170, the first directional valve 124 may allow the refrigerant to move to the heat storage unit 170.

The refrigerant passing through the cold storage unit 170 is mixed with the refrigerant passing through the evaporator 140 or guided to the compression unit 110 separately, and a conventional refrigeration cycle is implemented. That is, even if the flow path of the refrigerant is selected to the capillary portion 30 or the auxiliary capillary portion 32 through the first directional valve 24, the refrigerant is all moved to the compression portion 110.

12 is a front sectional view of the refrigerator, and FIG. 13 is a side sectional view of the refrigerator. A description with reference to FIGS. 12 and 13 is as follows.

12 and 13 illustrate an embodiment of a direct cooling method that does not require a separate blower fan in order to deliver cold air of the cold storage unit 170 to a refrigerating chamber or a freezing chamber. . Since the cold storage unit 170 is exposed to the internal space of the refrigerator, cold air included in the cold storage unit 170 may be supplied to the refrigerator by natural convection.

Specifically, the cold storage unit 170 may be attached to an inner case forming a predetermined space therein. In addition, the plurality of cold storage parts 170 may be installed in the inner case, so that cold air is sufficiently stored in the cold storage part 170.

The cold storage unit 170 may be installed on the upper and side surfaces of the inner case, respectively. If the cold storage unit 170 is widely installed on various surfaces of the inner case, it is advantageous to have a larger contact area with air in the inner case even when the same amount of phase change material is used. When the contact area with the cold storage unit 170 increases, cold air stored in the cold storage unit 170 may be smoothly transferred into the inner case 180.

On the other hand, as shown in Figure 12 and 13, the cold storage unit 170 is a cold storage for the cold storage unit is installed in the refrigerating chamber 180b of the inner case, and a freezer for the cold storage 180a installed in the freezing chamber (180a) of the inner case. It may include wealth. The refrigerating compartment for the refrigerating compartment and the refrigerating compartment for the freezer compartment are installed according to the installation position. That is, it is possible to provide a plurality of cold storage parts in the inner case, and to separately install the cold storage parts according to the freezing compartment or the refrigerating compartment. Since the temperature of the freezer compartment and the refrigerating compartment is different, it is also possible to vary the size of the refrigerating compartment or the material of the refrigerating compartment so that the refrigerating compartment installed in the freezing compartment may include more cold air than the refrigerating compartment installed in the refrigerating compartment.

When the cold storage unit 70 is exposed to the inner case, cold air stored in the cold storage unit 170 may be used to cool the inside of the refrigerator by natural convection without a separate blowing fan.

On the other hand, in contrast to the direct cooling method according to 12 and 13 installed by a separate blower fan 142 adjacent to the cold storage unit 170, indirect cooling method for supplying cold air stored in the cold storage unit 170 into the refrigerator. It is also possible to implement. In this case, the blower fan 142 may be driven only when the electric charge is expensive to transfer the cool air of the heat storage unit 170 to the inside of the refrigerator.

14 is an overall control flowchart of the refrigerator according to the present invention. A description with reference to FIG. 14 is as follows.

First, the temperature inside the refrigerator is adjusted (S30). Since food and the like are stored in the refrigerator, the compression unit 110 or the like may be driven to sufficiently lower the temperature in the refrigerator.

And the temperature of the cold storage unit 170 is adjusted (S60). The heat storage unit 170 may accumulate cold air generated by the compression unit 110 or the like.

It is determined whether the electricity bill saving mode is set by the user (S80).

When the electric charge saving mode is not set by the user, it is determined that there is no need to save the electric charge, and the general operation is performed (S200). At this time, in the normal operation, the inside of the refrigerator may be cooled by a conventional refrigerating cycle or a process of accumulating cold air in the cold storage unit 170 may be performed. That is, normal driving may mean a state in which a refrigerator is normally driven regardless of whether an electric charge is expensive. Meanwhile, the general operation may have the same meaning as the original setting state operation described above.

If the electric charge saving mode is set, it is determined whether the electric charge is expensive (S81). At this time, whether the electric charge is expensive can be determined using the information transmitted from the energy management device (30). That is, when the power supply time corresponds to the first time period, it may be determined that the electric charge is relatively expensive, and when the power supply time corresponds to the second time period, it may be determined that the electric charge is relatively cheap.

If it is determined that the electric charge is expensive, first, the driving of the compression unit 110 is stopped (S82). This is because when the electric charge is expensive, driving the compression unit 110 may generate a relatively expensive electric charge.

The cold air stored in the cold storage unit 170 is cooled inside the refrigerator to cool the inside of the refrigerator (S90).

On the other hand, even if the electric charge saving mode is set, when the power supply time corresponds to the second time interval, and the electric charge is determined to be relatively low, the above-described general operation may be performed (S200).

FIG. 15 is a detailed control flowchart of cooling and internal cooling of a refrigerator in FIG. 14. A description with reference to FIG. 15 is as follows.

First, the flow path of the flow path guide part 108 is set to the A position (S32). The position A is a state in which the cooling of the storage unit 170 is not performed, or more cooling of the inside of the refrigerator is achieved as compared with the case where the flow path is set to the position B.

The internal temperature T _{ref of the} refrigerator is measured by the temperature sensor 104 in operation S34.

It is determined whether the measured temperature T _ref of the refrigerator is lower than the allowable range T _set -T _diff based on the set temperature of the refrigerator (S36).

If the inside temperature of the refrigerator is not low, the inside of the refrigerator needs to be cooled, and the compression unit 110 is driven to cool the inside of the refrigerator (S40).

On the other hand, if the internal temperature of the refrigerator is low, the driving of the compression unit 110 is stopped (S38). If the temperature inside the refrigerator is lower than the allowable range (T _set -T _diff ), it is determined that the inside of the refrigerator does not need to be cooled anymore. If the driving of the compression unit 110 is stopped initially, S38 may be omitted.

Subsequently, the temperature T _PCM of the cold storage part is measured by the cold storage part temperature sensor 106 (S62).

The shaft surface, the temperature (T _PCM) of naengbu 170 is greater than the axial naengbu set temperature (T _{PCM _ set),} it is determined in the axial naengbu 170 that there is a need to be chuknaeng cool air, as the refrigerant B position The flow path guide 108 is controlled to flow (S66).

When the refrigerant flows to the B position, relatively cool storage is made more than the A position, or the cool storage can be made by all the cool air generated in the compression unit 110.

In addition, the compression unit 110 is driven to allow cold air to be stored in the cold storage unit 170 (S68).

If the temperature of the storage cooling unit 170 is lower than the temperature of the storage cooling unit, the flow path guide unit 108 is controlled to move the refrigerant to the A position in the flow path guide unit 108 (S70). At this time, if the coolant is set to move to the A position in the flow path guide 108, S70 can be omitted.

Then, the driving of the compression unit 110 is stopped (S72). On the other hand, S72 can also be omitted if the compression unit 110 is not driven.

FIG. 16 is a detailed control flowchart of direct cooling when the electric charge is high in FIG. 14. FIG. 16 is a control flowchart when an electric charge saving mode is set by a user and the power supply time corresponds to the first time period. If the electric charge saving mode is set by the user, if the power supply time corresponds to the second time period, the control according to FIG. 16 is not performed. A description with reference to FIG. 16 is as follows.

First, the driving of the compression unit 110 is stopped (S82). This is because driving the compression unit 110 while the electric charge is relatively expensive generates a lot of electric charge.

Since the driving of the compression unit 110 is stopped, the temperature inside the refrigerator gradually increases. At this time, when the internal temperature of the refrigerator reaches a predetermined temperature, cold air stored in the cold storage unit 170 may be supplied into the refrigerator, and the temperature of the refrigerator may decrease.

In particular, the control flow of FIG. 16 relates to direct cooling, and may be in a state in which the cool storage unit 170 is exposed to the inside of the refrigerator as illustrated in FIGS. 12 and 13. Therefore, even if there is no separate driving device for supplying the cold air of the cold storage unit 170 to the inside of the refrigerator, the inside of the refrigerator may be cooled.

In addition, since the cold storage unit 170 is exposed to the inside of the refrigerator, it is not necessary to control the cold air of the cold storage unit 170 to be released depending on whether the temperature inside the refrigerator has risen above a predetermined temperature. Because the temperature inside the refrigerator rises later than the temperature inside the refrigerator when the temperature inside the refrigerator rises, and therefore, a temperature difference exists between the inside of the refrigerator and the storage cold storage 170, so that the condensation may naturally occur due to convection. This is because the inside of the refrigerator can be cooled.

And the temperature inside the refrigerator is measured by the temperature sensor 104 in the refrigerator (S84).

At this time, it is determined whether the internal temperature T _ref measured by the internal temperature sensor 104 is higher than a _critical temperature T _critical (S100).

If the measured internal temperature is higher than the _critical temperature (T _critical ), it is determined that the food, etc. stored in the refrigerator may be damaged to drive the compression unit 110 regardless of whether the electric charge is expensive ( S102).

Subsequently, the internal temperature T _ref is continuously measured (S106), and when the internal temperature is lower than the allowable range T _set − T _diff at the internal temperature of the refrigerator, the driving of the compression unit 110 is stopped ( S108). This is because the internal temperature T _ref is sufficiently lowered and it is determined that the internal cooling is sufficiently cooled.

FIG. 17 is a detailed control flowchart of indirect cooling when the electric charge is high in FIG. 14. FIG. 17 is a flowchart illustrating a case in which an electric charge saving mode is set by a user, when a power supply time corresponds to a first time period. If the electric charge saving mode is set by the user, if the power supply time corresponds to the second time interval, the control according to FIG. 17 is not performed. A description with reference to FIG. 17 is as follows.

The control flow of FIG. 17 is similar to the flow of FIG. 16, except that the inside of the refrigerator is indirectly cooled by the heat storage unit 170. That is, in FIG. 17, since the cold storage unit 170 is not exposed to the inside of the refrigerator, a separate blower fan 142 is used to discharge cold air stored in the cold storage unit 170 into the refrigerator.

17 omits the same parts as FIG. 16 and describes only differences.

If the inside temperature of the refrigerator is measured by the internal temperature sensor 104 (S82) and the measured inside temperature of the refrigerator (T _ref ) is higher than the allowable range T _set + T _diff at the refrigerator setting temperature, the inside of the refrigerator is It is determined that it needs to be cooled.

Then, the blower fan 142 is driven to supply the cool air of the heat storage unit 170 to the inside of the refrigerator (S94). The blower fan 142 may generate forced convection between the heat storage unit 170 and the refrigerator to cool the inside of the refrigerator.

18 is a view showing the operational flow of components according to the time of the first embodiment. A description with reference to FIGS. 9 and 18 is as follows.

The compression unit 110 is intermittently driven, and when the user selects an electric charge saving mode and determines that the electric charge is a high first time section, the compression unit 110 stops driving.

On the other hand, the internal temperature is raised or lowered depending on whether the compression unit 110 is driven, and when the driving of the compression unit 110 is stopped and a predetermined time elapses, the internal temperature may be raised to a threshold temperature. When the temperature inside the refrigerator rises to a _critical temperature (T _critical ), the compressor 110 is driven to lower the temperature inside the refrigerator.

Likewise, the flow path guide 108 may be selected as the A position or the B position. In the case where the flow path guide part 108 is set to the A position, since the refrigerant is guided to the cold storage part 170 after passing through the evaporator 140, relatively less cool air is accumulated in the cold storage part 170. . In this case, relative means a comparison with the case where the flow path guide 108 is located at the B position.

Therefore, when the flow guide 108 guides the coolant to the B position, rather than guides the coolant to the A position, the temperature of the heat storage unit 170 is lowered with a large slope.

When the flow path guide part 108 forms a flow path to the B position, since the refrigerant is not guided to the evaporator 140, the temperature in the refrigerator increases.

19 is a view showing an operational flow of components according to the time of the second embodiment. For convenience of description, FIG. 19 will be described based only on differences from FIG. 18. A description with reference to FIGS. 10 and 19 is as follows.

In FIG. 19, the coolant may be guided to the A position or the B position by the flow path guide part 108. When the coolant is guided to the A position, the coolant does not pass through the cold storage part 170. Therefore, when the valve is in the position of A, the temperature of the cold storage unit 170 is raised without being lowered, but only the temperature inside the refrigerator may be lowered.

On the other hand, when the valve is in the position of B, since the refrigerant passes through the evaporator 140 and the cold storage unit 170 in turn, cooling inside the refrigerator and cold storage of the cold storage unit 170 are simultaneously performed. Therefore, in the section, the temperature inside the high temperature and the temperature of the cold storage unit 170 is simultaneously lowered. When the valve is set to the position of B, the slope of the temperature drop inside the refrigerator is smaller than that of the A position.

20 is a diagram showing the operational flow of components according to the time of the third embodiment. For convenience of description, FIG. 20 will be described based only on differences from FIG. 18. A description with reference to FIGS. 11 and 20 is as follows.

In FIG. 20, the coolant may be guided to the A position or the B position by the flow path guide part 108. In the case where the refrigerant is guided to the A position, the coolant is not formed as in FIG. 19.

On the other hand, unlike Figures 18 and 19, when the flow path is formed in the B position, the refrigerant is not passed through the storage unit 170, the refrigeration cycle passing through only the evaporator 140 is implemented. That is, the coolant may be guided to the cold storage unit 170 to cool the battery or may be guided to the evaporator 140 to cool the inside of the refrigerator. Therefore, when the valve forms a flow path in the A position, the temperature inside the refrigerator is lowered, but the temperature of the heat storage 170 is not lowered. On the other hand, when the valve forms a flow path to the B position, the temperature of the cold storage unit 170 is lowered, but the temperature in the refrigerator is not lowered. Therefore, according to the present embodiment, the user can selectively control the cold storage in the internal temperature and the cold storage part.

The present invention is not limited to the above-described embodiments, and as can be seen in the appended claims, modifications can be made by those skilled in the art to which the invention pertains, and such modifications are within the scope of the present invention.

20: measuring device 30: energy management system
34: communication unit 34: control unit
38: input unit 39: display unit
40: clock / timer 102: refrigerator control part
110: compression section 120: condensation section
130: capillary 132: auxiliary capillary
140: evaporator 170: cold storage

Claims (18)

A compression unit for compressing the refrigerant;
A condenser for condensing the refrigerant passing through the compression unit;
A capillary unit for lowering the temperature and pressure of the refrigerant passing through the condensing unit;
An evaporator for evaporating the refrigerant passing through the capillary portion;
A cold storage part configured to cool through heat exchange through conduction with a refrigerant circulating through a refrigeration cycle;
A flow path guide part for changing a flow path of the refrigerant; And
And an energy management device configured to perform an electricity rate saving mode for saving electricity rates based on externally supplied power information.
The refrigerator further comprises a refrigerator control unit for controlling the flow path guide unit and the compression unit in accordance with the power information transmitted from the energy management device. The method of claim 1,
The power information is a refrigerator, characterized in that related to the power supply time that the electric charge is different. The method of claim 2,
The refrigerator control unit, characterized in that if the electric charge is relatively cheap, the flow path guide portion to adjust the internal cooling of the refrigerator or the cold storage to the storage. The method of claim 1,
The accumulator is a refrigerator, characterized in that disposed in the rear end of the evaporator. 5. The method of claim 4,
The flow path guide portion includes a first direction switching valve for branching a refrigerant from the front of the capillary portion,
And an auxiliary capillary unit for lowering the temperature and pressure of the refrigerant branched from the first diverter valve. The method of claim 5,
The refrigerant passing through the auxiliary capillary and the refrigerant passing through the evaporator are mixed or individually guided to the storage cooling unit. 5. The method of claim 4,
The flow path guide portion includes a second diverter valve for branching a refrigerant from the rear of the evaporator.
And a bypass tube for guiding the refrigerant branched from the second diverter valve. The method of claim 7, wherein
The bypass pipe, based on the refrigeration cycle direction, characterized in that the refrigerator is arranged in parallel with the cold storage. The method of claim 1,
The flow path guide part includes a first direction switching valve through which the refrigerant passing through the condensation part branches.
Further comprising: an auxiliary capillary portion installed in the rear of the first direction switching valve,
And the accumulator is disposed at a rear end of the auxiliary capillary unit. 10. The method of claim 9,
The refrigerator according to the refrigeration cycle direction, characterized in that the cold storage unit is disposed in parallel with the evaporator. The method of claim 10,
The refrigerant passing through the accumulator is mixed with the refrigerant passing through the evaporator or individually guided to the compression unit. The method of claim 1,
And the storage unit is attached to an inner case forming a predetermined space therein. The method of claim 12,
The cold storage part is a cold storage part for a refrigerator compartment installed in the refrigerator compartment of the inner case;
A refrigerator further comprising a freezing compartment for a freezer compartment installed in the freezer compartment of the inner case. Determining whether an electric charge saving mode for the refrigerator is selected; And
If the electric charge saving mode is selected, stopping the driving of the compression unit when the electric charge is relatively high, and cooling the inside of the refrigerator by using the cold air stored in the cold storage unit. 15. The method of claim 14,
When the electricity rate saving mode is not selected or the electricity rate saving mode is selected, when the electricity rate is relatively low, a general operation step in which the compression unit is driven to supply cold air to the refrigerator or to store cold air in the cold storage part is performed. Control method of a refrigerator, characterized in that performed. 16. The method of claim 15,
The control method of the refrigerator, characterized in that for supplying cold air to the inside of the refrigerator or storing the cold air in the cold storage selectively in the normal operation step. 16. The method of claim 15,
In the general operation step, when the temperature of the cold storage unit is higher than the set temperature of the cold storage unit, the control method of the refrigerator, characterized in that the flow path of the refrigerant is adjusted to allow a lot of storage. 15. The method of claim 14,
Even when the electric charge saving mode is selected, the control unit of the refrigerator, characterized in that the compression unit is driven when the temperature inside the refrigerator is greater than the threshold temperature.

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