KR20070072240A - Refrigerating apparatus and controlling method thereof - Google Patents

Abstract

A refrigerating system and a control method thereof are provided to minimize a time when food temperature stays in a maximum freezing point generating section when storing food in a freezing compartment, thereby optimizing quality of the food. A refrigerating system includes a rapid cooling button(210) for serving as an input element for rapid cooling of rapid cooling chambers, and a control part(200) for sensing signals output from the rapid cooling button for supplying chilled air to the rapid cooling chambers concentratedly. A sensor part(15) measures a cavity temperature of a general refrigerating compartment. A driving part(220) is driven by a control signal of the control part for driving a blower fan motor(221) and a damper moving motor(222). The control part turns on a compressor(28) and closes an upward path by the damper moving motor in response to a rapid cooling button input. The control part stops operation of the blower fan motor for realizing rapid cooling by the compressor. The upper path is opened by the damper moving motor under the control of the control part for preventing temperature rising of the general refrigerating compartment by the chilled air concentration on the rapid cooling chambers, when the blower fan is operating at a first speed and the measured temperature reaches a first set temperature.

Description

Refrigerating apparatus and controlling method

1 is a graph showing a change in temperature at which food is cooled by a freezer.

Figure 2 is a side sectional view of a refrigerating device showing a state in which the cold air circulates in the freezing device according to an embodiment of the present invention.

Figure 3 is an exploded perspective view illustrating a cold air guide according to a first embodiment of the present invention.

4 is a view showing the flow of cold air moved by the cold air guide according to the first embodiment of the present invention.

5 is a block diagram illustrating a refrigeration apparatus according to an embodiment of the present invention.

6 is an exploded perspective view illustrating a cold air guide when the upper passage is closed according to the first embodiment of the present invention.

7 is a view showing the flow of cold air moved by the cold air guide when the upper passage is closed in accordance with the first embodiment of the present invention.

8 is an exploded perspective view illustrating a cold air guide when the upper flow path is closed according to the second embodiment of the present invention.

9 is a view showing the flow of cold air moved by the cold air guide when the upper passage is closed in accordance with a second embodiment of the present invention.

10 is a flowchart illustrating a control method of a refrigeration apparatus according to an embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerating device, and more particularly, to a refrigerating device and a control method thereof capable of rapidly cooling a predetermined region in a refrigerator.

In general, a refrigerator is divided into an ice compartment and a freezer compartment for storing frozen foods at a set temperature and a refrigerating compartment in which refrigeration objects are performed, and a refrigeration cycle device is installed therein, and is circulated in a refrigeration cycle of compression, condensation, expansion, and evaporation. In order to keep the inside freezing and refrigeration, the evaporator absorbs heat from the outside of the circuit.

In addition, the refrigerator generally has a structure in which a freezer compartment is installed at an upper portion of the refrigerator compartment, but in a large refrigerator, a side by side type in which a refrigerator compartment and a freezer compartment are installed at the left and right to store a larger amount of food (side by side) type) refrigerators are often used.

On the other hand, a refrigeration apparatus that is mainly used to store frozen food under a set temperature using a refrigeration cycle as described above is used, the refrigeration apparatus is the cold air circulated in the high-temperature heat exchanger with the evaporator is cooled again, re-cooled cold air Is a device for reflowing into the air along a predetermined flow path.

That is, the cold air circulated in the refrigerator is sucked into the evaporator, and the cold air sucked into the evaporator is exchanged by the evaporator and then moved by a predetermined blower fan to be introduced into the refrigerator through the discharge hole in the refrigerator.

On the other hand, in general, food such as meat destroys the cells as the intracellular moisture is determined during freezing, thereby degrading the quality of the food. In particular, cell destruction occurs in the temperature range of -1 ~ -5 ℃, the maximum freezing point generation interval.

1 is a graph showing a temperature change in which food is cooled by a freezing device.

Referring to FIG. 1, when food at 20 ° C. flows into the refrigerator, the food is cooled by cold air, and when the predetermined time t1 elapses, the food becomes −1 ° C. FIG.

Then, the temperature of the food is maintained at a temperature range of -1 to -5 ° C., which is the maximum freezing point generation period, until the predetermined time t2 is reached, and the food is frozen after the t2 time has elapsed.

As shown, there is a problem that the food quality is degraded as the time (Δt) of the food is maintained at the temperature range of -1 ~ -5 ℃ the maximum freezing point generation interval.

The present invention is proposed to solve the above problems, it is possible to minimize the time the food temperature stays in the maximum freezing point generation temperature interval during the freezing preservation of food, thereby optimizing the quality of the stored food An object of the present invention is to propose a refrigeration apparatus and a control method thereof.

In addition, in the process of minimizing the time for which the temperature of the food stays in the maximum freezing point generation temperature range, it is proposed to provide a refrigerating device and a control method thereof in which the temperature in the general cooling bin other than the rapid cooling bin can be prevented from rising. The purpose.

Refrigeration apparatus according to an embodiment of the present invention for achieving the above object is a blowing fan for moving the heat exchanged cold air; A main body provided with a flow path formed in a predetermined direction to guide cold air moved by the blowing fan; An upper guide which sucks cold air moved upward by the main body and guides the sucked cold air into the air; And a damper for selectively opening and closing an upper flow path for guiding cold air to move from the main body to the upper guide.

In addition, the refrigerating device of the present invention includes a cold air guide unit which is mounted to the rear and the heat exchanged cold air is moved by a blowing fan; Rapid cooling compartment formed in the refrigerator; A controller for changing a flow path of cold air guided by the cold air guide to cool the rapid cooling compartment; A damper to selectively prevent the cold air guided by the cold air guide from moving upward; And a damper moving motor for moving the damper under the control of the controller. When the damper moving motor is operated by the controller, cold air guided along the cold air guide by the damper is moved upward. Is prevented, and thus cool air is moved to the rapid cooling compartment.

According to another aspect of the present invention, a control method of a refrigerating device is provided with a cold air guide part in which a heat exchange path of cold air is formed, and an upper flow path of cold air formed by the cold air guide part to cool a rapid cooling compartment formed in the inside of the refrigerator. It is characterized in that the closing.

By the freezing apparatus and its control method as proposed, it is possible to minimize the time the food temperature stays in the maximum freezing point generation temperature range during the freezing and preservation of the food, thereby optimizing the quality of the stored food There is this.

In addition, even in the process of minimizing the time that the temperature of the food stays in the maximum freezing point generation temperature range, there is an advantage that the temperature in the general cooling compartment other than the rapid cooling compartment can be prevented from rising.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail. However, one of ordinary skill in the art who understands the spirit of the present invention can easily propose another embodiment within the scope of the same spirit by adding, changing, deleting, and adding components, but this is also within the scope of the spirit of the present invention. I will say that.

2 is a side cross-sectional view of a refrigerating device showing a state in which cold air circulates in the refrigerating device according to an embodiment of the present invention.

Referring to FIG. 2, the refrigerating device 10 according to the present invention has an outer shape, a main body 12 having a storage space formed therein, and a door 11 rotatably mounted on a front surface of the main body 12. And, an evaporator 13 for heat-exchanging the circulated air to supply the cold air into the air, and a blowing fan 124 mounted on the upper side of the evaporator 13 to move the cold air heat exchanged by the evaporator 13 and The cold air guide unit 100 is formed to form a flow path of cold air moved by the blowing fan 124.

In addition, the cold air guide unit 100 is mounted on the rear side of the door 11 (the left side of the door in the illustrated figure), and the cold air moved along the cold air guide unit 100 through the predetermined hole. Inflow.

In addition, a quick cooling compartment 14 according to an embodiment of the present invention may be set in the inside of the refrigerator, and a temperature of a cooling compartment other than the quick cooling compartment 14 (hereinafter, referred to as a general cooling compartment) may be set at one side of the interior of the refrigerator. The sensor unit 15 that can measure the is mounted.

In addition, a lower portion of the rear surface of the refrigerating device 10 is provided with a machine room 26, and a compressor 28 and a condenser 27 are mounted inside the machine room 26. In addition, the evaporator 13 is mounted above the machine room 26.

In addition, a plurality of discharge holes 16 are formed to allow the cold air moved along the cold air guide part 100 to be introduced into the inside of the refrigerator, and the lower portion of the inside of the cold air guides the circulated cold air to be reintroduced into the evaporator 13. An evaporator suction side hole 125 is formed.

In detail, the cold air guide unit 100 serves to efficiently change the flow path of the cold air moved by the blower fan 124 and to move the cold air to the upper side, the front side, and the lower side.

In addition, the cold air guide unit 100 is equipped with a predetermined damper (to be described later) that can selectively prevent cold air from moving upward of the refrigerating device 10, and a damper capable of operating the movement of the damper. A moving motor (described later) is further mounted.

On the other hand, in order to allow the cold air moved by the blowing fan 124 to be introduced into the inside of the cold air guide portion 100, predetermined flow paths are formed on the upper side, the front side, and the lower side.

In addition, the blowing fan 124 may be mounted on the upper side of the evaporator 13, and may be installed to penetrate the cold air guide unit 100.

In addition, the blowing fan 124 may be formed of a turbo fan or a sirocco fan or the like in which the inflow direction and the discharge direction of the air cross.

The outside of the blower fan 124 has guide ribs (to be described later) that can prevent the cooling loss of the cool air from occurring while reducing the flow resistance of the cold air moved by the blower fan 124. Is mounted.

In this case, the cold air moved by the blower fan 124 is spread out while the radius of curvature gradually increases in the tangential direction of the blower fan 124, and the guide ribs are spread out by the blower fan 124. It is formed approximately similar to the shape of the flow path. The guide rib will be described later with reference to the accompanying drawings.

On the other hand, the cold air flow of the refrigerating device according to an embodiment of the present invention will be described below.

The cold air cooled by the evaporator 13 is moved upward by the blower fan 124, and the cold air moved upward is moved forward by the blower fan 124.

In addition, the cold air moved forward by the blower fan 124 is guided along a predetermined guide rib formed outside the blower fan 124 to move a predetermined amount in the forward, upper and lower directions, respectively.

The cold air moved forward along the predetermined guide ribs formed on the outside of the blower fan 124 is introduced into the refrigerator through the discharge hole formed on the front side, and the cold air moved upwards is inside the cold air guide unit 100. After being moved along the flow path formed in the flow through the predetermined discharge hole into the chamber. In addition, the cold air moved downward is moved along the flow path formed inside the cold air guide part 100 and then introduced into the refrigerator through a predetermined discharge hole.

The cold air introduced into the refrigerator is moved to the lower side after freezing the stored frozen product, and the cold air moved to the lower side is moved along the evaporator suction side hole 125 and then reintroduced into the evaporator 13.

3 is an exploded perspective view illustrating a cold air guide unit according to a first embodiment of the present invention, and FIG. 4 is a view illustrating a flow of cold air moved by the cold air guide unit according to the first embodiment of the present invention.

3 and 4, the cold air guide unit 100 according to the embodiment of the present invention includes a main body 120 capable of providing a flow path of cold air moved by the blowing fan 124, and the main body. An upper guide 110 mounted on an upper side of the body 120 to move the cold air guided by the main body 120 upward, and a main body cover 130 coupled to a front surface of the main body 120. Included.

In addition, a plurality of discharge holes are formed in the main body cover 130 and the upper guide 110 to allow cold air moved by the main body 120 to flow into the refrigerator.

In detail, the main body 120 serves to provide a flow path of cold air moved by the blowing fan 124, and a plurality of flow paths are formed by guide ribs protruding to a predetermined height.

In more detail, the main body 120 has a downward passage 121 for guiding the cold air moved by the blowing fan 124 to move downward, and the cold air moved by the blowing fan 124 forward. A front flow passage 122 for guiding the movement and an upward flow passage 123 for guiding the cold air moved by the blower fan 124 to move upward.

In addition, the upper side of the blowing fan 124 includes a damper 126 for selectively opening and closing the upper flow path 123, and a damper moving motor 222 for moving the damper 126.

In addition, the damper 126 may be moved by the operation of the damper moving motor 222, and the upper flow path 123 may be selectively opened and closed by the damper 126. To this end, a gear 127 connected to the drive shaft of the damper movement motor 222 is further provided, and the damper 126 may be formed with a predetermined gear tooth that may engage with the gear 127.

Meanwhile, a plurality of discharge holes are formed at predetermined portions of the main body cover 130 to allow the cold air moved along the first and front flow passages 121 and 122 to be introduced into the refrigerator.

In other words, when the main body cover 130 is coupled to the main body 120, the first body cover 130 is positioned on the first and front flow paths 121 and 122. The first discharge hole 131 and the second discharge hole 132 are formed to allow the cold air moved along the first and front flow paths 121 and 122 to be introduced into the refrigerator.

The first discharge hole 131 may be designed to have a different position or size, and may include a plurality of discharge holes 131a, 131b, and 131c.

In addition, one end of the front flow passage 122 may be blocked in order to allow the cold air moving along the front flow passage 122 to flow into the refrigerator through the second discharge hole 132.

In addition, the cold air moved along the upper flow path 123 is moved into the upper guide 110, and is introduced into the refrigerator through the plurality of upper discharge holes 111 formed in the upper guide 110.

To this end, a predetermined flow path (not shown) through which the cold air moved along the upper flow path 123 may be formed in the upper guide 110, and the upper discharge holes 111 may be formed in the upper guide ( 110 may be formed on the flow path formed inside.

In addition, an evaporator suction side hole 125 is formed below the main body 120 to allow cold air circulated in the refrigerator to flow back into the evaporator 13 side.

On the other hand, the flow of cold air by the cold air guide according to the present invention will be described below.

When the upper flow path 123 by the damper 126 is not closed, the cold air heat exchanged by the evaporator 13 is moved into the cold air guide unit 100 by the blower fan 124. The cold air moved by the blowing fan 124 is moved along the flow paths 121, 122, and 123 formed by predetermined guide ribs around the blowing fan 124.

In detail, when the cool air moved by the blower fan 124 is moved along the lower flow passage 121 and / or the front flow passage 122, the cool air is moved to the rapid cooling compartment 14.

In addition, when the cold air is moved along the upper flow path 123, the cold air moves in the upper direction of the refrigerating device and flows into the refrigerator.

In addition, cold air, which has cooled the frozen product stored in the refrigerator, is moved through the evaporator suction side hole 125 and exchanged again by the evaporator 13.

5 is a block diagram illustrating a refrigeration apparatus according to an embodiment of the present invention.

Referring to FIG. 5, the refrigerating device of the present invention selectively detects a quick cooling button 210 serving as an input means for rapidly cooling the quick cooling compartment 14 and a signal of the quick cooling button 210. The control unit 200 for controlling the cold air supply to the rapid cooling compartment 14, the sensor unit 15 for measuring the temperature in the general cooling compartment, the compressor 28 for compressing the refrigerant, and the control unit The driving unit 220 driven according to the control signal of the 200, the blowing fan motor 221 and the damper moving motor 222 that is operated under the control of the driving unit 220 is included.

In detail, when the rapid cooling button 210 is input, the controller 200 turns on the compressor 28 and controls the driving unit 220 to operate the damper moving motor 222. The upper passage 123 is closed.

In addition, the control unit 200 stops the operation of the blower fan motor 221 so that the refrigerant is rapidly cooled by the operation of the compressor 28. In this case, since the operation of the blower fan 124 is stopped, the cold air circulating in the refrigerator is also stopped from being heat-exchanged with the evaporator 13.

The control unit 200 counts the operating time of the compressor 28, and when the operating time of the counted compressor 28 reaches a predetermined time, the blowing fan 124 is operated at a first rpm. To control. In this case, as the blower fan 124 is operated, cold air in the refrigerator is circulated, and heat exchange of cold air by the evaporator 13 is performed.

The controller 200 may count an operating time of the blowing fan 124. When the operating time of the blowing fan 124 reaches a set time, the control unit 200 moves the blowing fan 124 to the first rpm. Control to operate at a smaller second rpm.

This is to minimize the temperature of the evaporator 13 is increased by the operation of the blowing fan 124. In addition, the rapid cooling of the rapid cooling compartment 14 is to be carried out, so as to reduce the time the temperature of the stored food stays in the maximum ice crystal generation temperature band.

In addition, while the blowing fan 124 is operated at a first rpm, the controller 200 measures the temperature of the general cooling compartment through the sensor unit 15, and the measured temperature is a first set temperature. When reaching, the damper movement motor 222 is driven to open the upper flow path 123.

Therefore, the temperature of the general cooling compartment can be prevented from rising by the concentration of cold air in the rapid cooling compartment 14.

The controller 200 determines whether the temperature of the general cooling compartment measured by the sensor unit 15 is less than or equal to the second predetermined temperature, and thus the temperature of the general cooling compartment is less than or equal to the second predetermined temperature. In this case, the upper passage 123 is closed by the damper 126 to control the rapid cooling course.

6 is an exploded perspective view illustrating a cold air guide when the upper passage is closed according to the first embodiment of the present invention, and FIG. 7 is a cold air guide when the upper passage is closed according to the first embodiment of the present invention. The figure shows the flow of cold air moved by.

In the case where the rapid cooling course is performed according to an embodiment of the present invention, the damper moving motor 222 is operated so that the damper 126 is moved to a position for closing the upper flow path 126.

For example, when the damper movement motor 222 is rotated forward, the damper 126 is moved to a position to close the upper flow path 123, and when the damper movement motor 222 is reversely rotated The damper 126 may be moved to a position to open the upper passage 123.

When the upper flow path 123 is closed by the damper 126, as illustrated in FIG. 7, the cold air moved by the blowing fan 124 may be the lower flow path 121 and the front flow path 122. Is moved along.

The cold air moved along the lower flow passage 121 and the front flow passage 122 is moved into the rapid cooling compartment 14 through the first discharge hole 131 and the second discharge hole 132. .

Accordingly, rapid cooling of the rapid cooling compartment 14 is performed by concentrating the cold air (or cold air bleeding phenomenon) in the rapid cooling compartment 14.

8 is an exploded perspective view illustrating a cold air guide when the upper passage is closed according to the second embodiment of the present invention, and FIG. 9 is a cold air guide when the upper passage is closed according to the second embodiment of the present invention. The figure shows the flow of cold air moved by.

8 and 9, the damper 126 may be opened and closed up and down to close or open the upper flow path 123 as described above.

In detail, the cold air guide unit 100 according to the second embodiment of the present invention includes a damper 126 mounted on the upper flow passage 123 and a hinge for fixing one side of the damper 126 to be fixed.

In addition, a bevel gear 129 consisting of a first bevel gear 129a and a second bevel gear 129b and a damper movement for rotating the bevel gear 129 to rotate the hinge formed on the damper 126. Motor 222 is included.

When the rapid cooling course as described above is performed, the damper moving motor 222 is operated by the controller 200 to close the upper flow path 123.

As the damper moving motor 222 is operated, the bevel gear 129 is rotated, so that the damper 126 is lowered by a hinge axially connected to the second bevel gear 129b.

Then, the damper 126 is lowered about the hinge to close the upper passage 123.

In this case, the flow of cold air due to the closing of the upper flow path 123 is as shown in FIG. 7, through the lower flow path 121 and the front flow path 122, the first discharge hole 131 and the second flow path. The cold air is supplied to the rapid cooling compartment 14 by being moved to the discharge hole 132.

10 is a flowchart illustrating a control method of a refrigeration apparatus according to an embodiment of the present invention.

First, when the rapid cooling button 210 is input (S100), the controller 200 determines whether the compressor 28 is on (S110).

When the compressor 28 is not in an on state, the compressor 28 is turned on (S120).

After the compressor 28 is turned on, the operation of the blower fan 124 is turned off, and the damper movement motor 222 is operated to close the upper flow path 123 (S130). ).

Accordingly, rapid cooling of the refrigerant by the operation of the compressor 28 is performed, and the operation of the blower fan 124 is stopped, so that the cold air circulating in the inside of the refrigerator is heat-exchanged with the evaporator 13. .

In addition, the controller 200 counts an operation time of the compressor 28 to determine whether the compressor 28 has been operated for a first set time (S140), and the compressor 28 is configured to be the first. If it is operated for a set time, the blower fan 124 is moved to the first rpm (S150).

In this case, as the blower fan 124 is operated, cold air in the refrigerator is circulated, and heat exchange of cold air by the evaporator 13 is performed.

Next, the controller 200 counts the operation time of the blowing fan 124 to determine whether the blowing fan 124 has been operated for a second predetermined time (S160), and the blowing fan 124 When the air is operated for the second set time, the blower fan 124 is controlled to operate at a second rpm smaller than the first rpm (S170).

This is to prevent the cooling efficiency of the refrigerant from falling as the temperature rise of the evaporator 13 is minimized while the temperature of the evaporator 13 is minimized as the blower fan 124 is operated.

To this end, when the blower fan 124 is operated at a first rpm for a second predetermined time, the blower fan 124 is operated at a second rpm smaller than the first rpm, and thus stored while the rapid cooling unit 14 is rapidly cooled. The time the food stays at the maximum ice crystal production temperature is reduced.

Then, it is determined by the controller 200 whether the blower fan 124 is operated for a third set time at a second rpm (S180), and the blower fan 124 is set to a third set time at the second rpm. During operation, the rapid cooling course according to the embodiment of the present invention ends.

However, when the blowing fan 124 is not operated at the second rpm for a third set time, the controller 200 reads the temperature of the general cooling compartment through the sensor unit 15 and measures the measured temperature. It is determined whether has reached the first set temperature (S190).

This is to prevent the temperature of the general cooling compartment from increasing in accordance with the concentration of cold air in the rapid cooling compartment 14 during the rapid cooling course according to the embodiment of the present invention.

When the temperature of the general cooling compartment does not reach the first set temperature, cold air is concentratedly supplied to the rapid cooling compartment 14 while the step S180 is repeatedly performed.

However, when the temperature of the general cooling compartment measured by the sensor unit 15 reaches the first set temperature, the controller 200 drives the damper moving motor 222 to the upper flow path 123. To open (S200).

Accordingly, the temperature of the general cooling compartment can be prevented from rising by the concentration of cold air in the rapid cooling compartment 14.

In addition, the controller 200 determines whether the temperature of the general cooling compartment measured by the sensor unit 15 is less than or equal to the second predetermined temperature (S210), and the temperature of the general cooling compartment is set to the second. When the temperature is lower than the temperature, the upper passage 123 is closed by the damper 126 (S220), so that the cool air is concentrated in the rapid cooling compartment 14.

The second set temperature is a temperature at which freezing and preservation of the stored food can be made, and becomes a temperature lower than the first set temperature.

According to the embodiment of the present invention as described above, the cooling of the refrigerant and the concentrated supply of cold air to the rapid cooling compartment are made, and during the cryopreservation of the food, the time for which the temperature of the food stays in the maximum freezing point generation temperature section is minimized. Can be.

By the freezing apparatus and its control method as proposed, it is possible to minimize the time the food temperature stays in the maximum freezing point generation temperature range during the freezing and preservation of the food, thereby optimizing the quality of the stored food There is this.

In addition, even in the process of minimizing the time that the temperature of the food stays in the maximum freezing point generation temperature range, there is an advantage that the temperature in the general cooling compartment other than the rapid cooling compartment can be prevented from rising.

Claims (10)

Blowing fan for moving the heat exchanged cold air; A main body provided with a flow path formed in a predetermined direction to guide cold air moved by the blowing fan; An upper guide which sucks cold air moved upward by the main body and guides the sucked cold air into the air; And And a damper for selectively opening and closing an upper flow path for guiding cold air from the main body to the upper guide. The method of claim 1, And a damper moving motor for providing a predetermined power source to selectively move the damper. The method of claim 1, And when the upper passage is closed by the damper, the cold air moved into the main body is moved downward and / or forward of the freezing device. A cold air guide unit mounted at the rear to move the cold air exchanged by the blower fan; Rapid cooling compartment formed in the refrigerator; A controller for changing a flow path of cold air guided by the cold air guide to cool the rapid cooling compartment; A damper to selectively prevent the cold air guided by the cold air guide from moving upward; And And a damper moving motor for moving the damper under the control of the controller. When the damper moving motor is operated by the control unit, the cold air guided along the cold air guide by the damper is prevented from moving upward, and thus the cold air is moved to the rapid cooling compartment. Device. The method of claim 4, wherein The cooling chamber is formed in addition to the rapid cooling compartment, A refrigeration apparatus, characterized in that the sensor unit for measuring the temperature of the general cooling compartment is mounted on one side of the inside. The method of claim 4, wherein The control unit is a refrigeration apparatus, characterized in that for setting whether the operation of the blower fan and the damper moving motor according to the temperature of the general cooling compartment measured by the sensor unit. A cold air guide portion is provided, through which heat flow paths of cold air are exchanged. The cooling method of the refrigeration apparatus characterized by closing the upper flow path of the cold air formed by the said cold air guide part in order to cool the quick cooling compartment formed in the inside of a store. The method of claim 7, wherein The control method of the refrigerating device, characterized in that the operation of the blower fan for moving the heat exchanged cold air is stopped to cool the rapid cooling compartment formed in the chamber, the operation of the compressor is turned on. The method of claim 8, When the compressor is operated for the first set time, the blowing fan is operated at a first rpm, and after the blowing fan is operated at the first rpm for a second set time, the blowing fan is less than the first rpm at a second rpm. Control method of a refrigeration apparatus, characterized in that the operation. The method of claim 7, wherein The control method of the refrigerating device, characterized in that the closing of the upper flow path is determined according to the temperature measured by the sensor unit provided in the chamber.

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