KR101458199B1 - refrigerator - Google Patents

Abstract

A refrigerator according to the present invention includes a cold air preservation unit which is installed on a freezer or refrigerator compartment to store cold air during a normal operation and supply the stored cold air to the freezer or refrigerator compartment after a power failure occurs or a defrosting operation is started to maintain the low temperature within the compartment. The present invention can prevent the temperature in the compartment from rising in case of a power failure while increasing the operation efficiency of the refrigerator and reducing the temperature variation in the compartment.

Description

Refrigerators with cold storage units {refrigerator}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator, and more particularly, to a refrigerator having a cold storage unit capable of preventing the temperature of a refrigerator or a freezer room from rising sharply during a power failure and reducing an operation rate.

Generally, a refrigerator discharges cold air generated by a refrigeration cycle including a compressor, a condenser, an expansion valve, and an evaporator to reduce the temperature inside the refrigerator to freeze or refrigerate foods or the like. A bottom freezer type in which a freezing compartment and a freezing compartment are divided into a top and a bottom compartment, a side-by-side type in which a freezing compartment and a refrigerating compartment are divided into left and right sides, By Side-Type.

The refrigerator includes an evaporator, a compressor, a condenser, an expansion valve, and the like, which form a refrigeration cycle for generating and supplying cool air. The cool air is generated by evaporating the latent heat of evaporation while evaporating the refrigerant supplied through the capillary tube or the expansion valve.

However, when the supply of electric power for driving the compressor is insufficient and frequent blackout occurs, the temperatures of the freezing room and the refrigerating room rapidly rise, and the stored food is damaged. Japanese Patent Laid-Open Publication No. 1999-0049518 discloses a shelf cooling apparatus for a refrigerator, and Utility Model Registration No. 20-0306014 discloses a refrigerator shelf provided with a cooling duct. In the patent publication No. 2003-0084335, a refrigerator shelf It is posted. Such a refrigerator has a means for supplying cold air to the shelf, but since the cold air is not supplied to the shelf during power failure, it is difficult to expect the effect of preventing the temperature of the freezer or the refrigerator from dropping. Korean Unexamined Patent Publication No. 10-2009-0126772 discloses a refrigerator refrigerator. The posted refrigerator includes a storage space, an axial cooling pack, and a cooling device for cooling the axial cooling material accommodated in the axial cooling pack, wherein the at least one pair of the air cooling passages And a shaft cooling pack case including a cooling / heating transmission plate and fixed so that a refrigerant pipe of the cooling device is in close contact with the cold / heat transfer plate. Since the refrigerator is cooled by using the cold air stored in the cooling pack, it is difficult to maximize the efficiency.

It is an object of the present invention to provide a refrigerator having a cold storage unit capable of preventing uneven distribution of electric power and preventing the temperature of a freezer compartment of the refrigerator compartment from rapidly rising during a power failure,

The present invention provides a refrigerator having a cold storage unit capable of improving the operation efficiency of the refrigerator and suppressing the temperature rise in the refrigerator when defrosting

In order to accomplish the above object, the present invention provides a refrigerator having a cold storage unit, which is installed in a freezer compartment or a refrigerating compartment, and which is capable of storing cold air in a refrigerator compartment or a freezer compartment, And a control unit.

In the present invention, the cold storage unit is formed with an inner space sealed in a shelf of the refrigerator, and a coolant is installed in the inner space. As another embodiment of the cold storage unit, an axial cooling pipe is installed on an outer surface or an inner surface of the freezing chamber or the refrigerating chamber, and a cooling material for accumulating the cooling air is injected into the axial cooling pipe during normal driving of the refrigerator.

In another embodiment of the cold storage unit, an inner space is formed in the guard of the refrigerator door, and the inner space is filled with the axial coolant.

The cold storage unit includes an evaporator for supplying cool air to the freezer compartment and a condenser unit for supplying cool air to a duct connecting the freezer compartment or the evaporator to the refrigerating compartment.

The cold storage unit has a structure in which a thin plate container having an inner space is provided inside a door that is opened and closed at an upper portion, and a coolant is stored in the inner space. The cold storage unit is provided with a shaft cooling tube along the inner circumferential surface of the yarn packing chamber.

The refrigerator having the cold storage unit of the present invention can prevent the temperature of the freezer compartment or the refrigerating compartment from rising sharply when the power supply is interrupted, reduce the operation rate of the refrigerator when the refrigerator is driven, The temperature inside the refrigerator can be prevented from rising.

1 is a sectional view of a refrigerator having a cold storage unit according to the present invention,
2 to 4 are perspective views illustrating a cold storage unit of a refrigerator having a cold storage unit according to the present invention,
5 is a perspective view showing another embodiment in which a cold storage unit is installed in a refrigerator having a cold storage unit according to the present invention,
6 is a partially cutaway perspective view showing a state in which a cold storage unit is installed in a duct according to the present invention,
7 is a perspective view showing another embodiment of a refrigerator having a cold storage unit according to the present invention,
Fig. 8 is an excerpt of the container of the refrigerator shown in Fig. 7, and is a perspective view showing a state in which the cold storage unit is installed. Fig.

The refrigerator having the cold storage unit according to the present invention is for storing cool air during normal driving and supplying cold air to the freezing room or the freezing room during pre-discharge or defrosting, and FIGS. 1 to 8 show embodiments.

Referring to the drawings, a refrigerator having a cold storage unit according to the present invention stores cold air during normal driving and supplies cold air to a freezing room or a refrigerating room during pre-discharge or defrosting, and FIGS. 1 to 6 show embodiments.

Referring to the drawings, a refrigerator (10) having a cold storage unit according to the present invention includes a refrigerator body (14) partitioned by a barrier (11) into a freezing chamber (12) and a refrigerating chamber (13); A freezing chamber door (15) and a refrigerating chamber door (16) for opening and closing the refrigerator body (14); And an ice maker (200) installed in the freezing chamber (12) for freezing the water to be supplied by cool air discharged and supplied to the freezing chamber (12).

The main body 14 of the refrigerator is provided with a compressor 21 and a condenser (not shown), an expansion valve (not shown), and the like, which form a refrigeration cycle so as to generate cool air required for cooling the freezer compartment 12 and the refrigerating compartment 13, A refrigeration cycle device including an evaporator 22 is installed. Particularly, the freezing chamber 12 and the freezing chamber 13 are arranged in such a manner that the cool air generated through the evaporator 22 in which the refrigerant evaporates in the gaseous phase among the elements of the refrigeration cycle apparatus can be discharged to the freezing chamber 12 and the refrigerating chamber 13. A cool air supply duct (25) and a cool air discharge opening (26) are formed on the inner wall of the rear surface of the refrigerating chamber (13).

The refrigerator 10 having the cold storage unit according to the present invention is installed at least at one side of the main body 14 of the refrigerator, the freezer compartment 12 or the refrigerating compartment 13 so as to be cooled down during normal driving of the refrigerator, And a cold storage unit (30) for storing the cold air of the freezing compartment or the freezing compartment.

1 and 2, a storage space 31 is formed in the shelf 17 of the freezer compartment 12 or the refrigerating compartment 13, and the inside of the shelf 17 And the space is filled with the axial coolant 32. The storage space 31 is parallel to the shelf 17 and may be formed in a communicating or meandering shape. The cold storage unit 30 may be formed of a thin plate container having a storage space in which the shelf is filled with the axial coolant, and the storage space 31 formed in the shelf may be formed in a region corresponding to a position where the stored product is placed . In addition, the shelf 17 may further include a rib for storing the stored product and storing the refrigerant in its inner periphery.

Fig. 3 shows another embodiment of the cold storage unit. The cold storage unit 40 is provided with an inlet portion 41 which is drawn in from the surface of the freezing chamber 12 or the refrigerating chamber 13 and a plate- The axial cooling pack 42 is installed. It is preferable that the axial cooling pack 42 is installed so as not to protrude so as not to occupy the space of the refrigerating chamber or the freezing chamber. The shaft cooling pack 42 may be integrally formed with an inner case 18 that separates the freezing compartment 12 of the refrigerator and the inner wall of the refrigerating compartment 13. The inlet portion is formed in the inner case.

4, the cold storage unit 50 includes a storage space 51 in which the storage space 51 is formed in the freezing chamber door 15 of the refrigerator or the guard 19 of the refrigeration chamber door 16, The cooling space 52 for storing the cooling air to the freezing chamber 13 or the freezing chamber 12 is stored in the space 51 at the time of power failure or defrosting in order to store the cooling air during normal operation of the refrigerator 14. [ The guard 19 installed in the refrigerator compartment door 16 or the freezer compartment door 15 of the refrigerator may be formed of a shaft cooling pack formed in this shape.

5 and 6 show still another embodiment of the cold storage unit according to the present invention.

The cold storage unit 60 of the refrigerator 10 shown in Figure 5 constitutes the refrigerator body 14 and is provided on the outer circumferential surface of the inner case 18 which forms the inner walls of the freezer compartment 12 and the refrigerating compartment 13 of the refrigerator, The axial cold pipe 61 arranged in a corrugated shape and provided on the outer circumferential surface of the inner case 18 corresponding to the refrigerating chamber 12 or the refrigerating chamber 13 and the axial coolant 32 filled in the axial cold pipe 61, Respectively. The axial cold pipe (61) is in contact with the inner case (18) in a state of being embedded in the heat insulating material of the refrigerator body (14). The axial refrigerant pipe (61) may be formed integrally with the inner case. A cap (not shown) may be provided at an inlet of one end of the axial cooling pipe 61 to block the inlet. In addition, an expansion amount sucking means capable of absorbing the amount of expansion of the axial coolant is provided in the cap for shutting off the axial cold pipe (61) or its injection port. The expansion amount sucking means may be provided with a space for inserting the expanded axial coolant into the cap or may be provided with an expansion amount tank at one side of the axial coolant pipe 61 to absorb the expansion of the coolant.

6, the cold storage unit 70 includes a storage space 71 in the duct body 25a of the duct 25 connecting the freezer compartment 12 and the refrigerating compartment 13, as shown in FIG. 6, And the axial coolant 32 may be injected into the storage space 71. In this case, Since the duct body 25a has a structure that can be engaged with and detachable from the inner case 18 of the refrigerator body 14, an inner space through which the refrigerant can be charged can be formed. The duct may be a duct located in the freezer compartment or the refrigerating compartment.

7 and 8 show another embodiment of the refrigerator according to the present invention.

7, the refrigerator 80 according to the present invention includes a refrigerator body 81 having a freezing chamber 81 or a refrigerating chamber 82, which is a side by side type in which the freezing chamber and the refrigerating chamber are divided into left and right sides, The cold storage unit 90 is provided on the inner surface of the door 84 which is provided on the upper side of the door 83 for opening and closing the freezing chamber 81 or the refrigerating chamber 82. [ The cold air storage unit 90 is provided with a concave groove 91 to be drawn into the inner surface of the door 84 to a predetermined depth and is formed into a thin plate shape in which the concave cold material 32 is filled in the concave groove 91 And a container 92 is provided. Here, the inner surface of the door 84 may be formed in a shape of a corrugated shape with a shaft cooling pipe filled with a cooling material.

The cold storage unit 100 may be further provided on the outer circumferential surface of the container 85 provided in the refrigerator body 83 and constituting the freezing chamber 81 or the refrigerating chamber 82, The present invention relates to an airtight container for a refrigerator which comprises an airtight container 102 provided on an outer circumferential surface of a direct cooling type evaporator in which a refrigerant coil 85a is installed and having an insertion groove 101 into which the refrigerant coil is inserted, Respectively.

In the refrigerator having the cold storage unit according to the present invention, the cold storage unit may include a storage space formed on the inner surface of the storage container of the ice maker installed in the freezing room, and the storage space may be filled with the axial coolant.

In the above embodiments, the cold storage material 32 constituting the cold storage units 30, 40, 50, 60, 70, 90, and 100 may be a mixture of a crosslinked polyacrylate salt and water. This axial coolant may be, but is not limited to, a product (product name: K-SAM) produced by LG Chem.

The operation of the refrigerator having the cold storage unit according to the present invention constructed as described above will be described as follows.

In the refrigerator having the cold storage unit according to the present invention, the refrigerant cycle, that is, the gaseous refrigerant pressurized at high temperature and high pressure in the compressor (21) is phase-changed into the high-pressure liquid state through heat exchange (condensation operation) The refrigerant passes through the expansion valve (not shown) while the phase-change refrigerant is decompressed (monotonically expanded) in a state where the refrigerant is easily evaporated by the heat exchange of the evaporator 22, The cold air is cooled by the surrounding air that has been heat-exchanged while being phase-changed to the gas phase state.

The cold air thus generated is driven by a blowing fan installed adjacent to the evaporator 22 and is discharged through the duct 25 to the discharge port vent formed in the inner wall or the side wall of the rear surface of the freezing chambers 12 and 81 and the refrigerating chambers 13 and 82. 26). The discharged cold air freezes or refrigerates the food or the stored food in the freezer compartment 12 and the refrigerating compartment 13.

In this process, the cold air is stored in the cold storage unit (30, 40, 50, 60, 70, 90, 100) provided in the refrigerator body (14). That is, the shelf 17, the guard 19, the axial refrigerant pipe 61 surrounding the freezer compartment 12 and the refrigerating compartment 13, and the storage spaces 31, 41, 51 and 71 of the duct 25 Cooling air is cooled in the stored axial coolant 32.

When the compressor is not driven due to an incomplete supply of electricity or a power failure, the cold air that has been chilled in one of the cold storage units (30, 40, 50, 60, 70, 90, 100) ) Or the cold storage room (13). In more detail, when the refrigerator is stopped due to a power outage, the temperature of the refrigerating chamber and the freezing chamber rises due to the high temperature of the outside air, and the refrigerated and refrigerated food stored in the room is damaged during the aging. The cold storage room or the freezing room is filled with the cold storage material 32 in the shelf 17 which is the cold storage unit 30, 40, 50, 60, 70, 90 or 100 or the storage space of the guard 19 is filled with the cold storage material 32 , The axial coolant 32 surrounding the inner case is filled with the axial coolant 32 or the axial coolant 32 is filled in the storage space of the damper 15 so that the cool air of the axial coolant 32 is supplied to the freezing chamber or the freezing chamber So that it is possible to prevent the temperature of the freezing compartment or the freezing compartment from rising sharply.

Particularly, in the defrosting operation for removing the property of the evaporator of the refrigerator 10, the compressor, which is driven for a certain period of time, is stopped and the temperature of the freezer compartment or the refrigerating compartment rises. This prevents the temperature of the freezing compartment or the refrigerating compartment from rising sharply can do.

Also, since the temperature of the refrigerating chamber (12) 81 or the refrigerating chamber (13) 82 of the refrigerator can be prevented from rising sharply during normal operation of the refrigerator, the operation rate of the refrigerator can be reduced.

According to the experiment of the present invention, the freezing chamber 12 of the refrigerator and the shelf 17 of the refrigerating chamber 13 are provided with a freezing chamber, and the temperature rise delay in the refrigerator, the operation rate, the temperature rise in the freezing chamber, Respectively. In this experiment, the refrigerator used a 362 liter Samsung refrigerator with a freezer capacity of 93 liters and a refrigerator room with 269 liters, and 1310 grams of cold storage material filled in the shelf.

As a comparative example, the same product was driven in the same manner as the condition in which the axial coolant was installed without installing the cold storage unit as the cold storage unit.

Temperature rise delay time in refrigerator          division Time to reach 0 ℃ at -20 ℃   Cold storage unit not installed      129 minutes   When installing cold storage unit      380 minutes

Operating rate of refrigerator          division Operating rate   Cold storage unit not installed      38.5%   When installing cold storage unit      34.7%

Temperature rise table          division Temperature rise in refrigerator   Cold storage unit not installed      + 0.5 ° C at -20 ° C   When installing cold storage unit    -20 ° C to -6 ° C

Temperature dispersion in the refrigerator,          division      Scatter   Cold storage unit not installed      9.5 ℃   When installing cold storage unit      6.5 ° C

Through the above-described construction and experiment, it can be seen that the refrigerator having the cold storage unit according to the present invention has a cold storage unit in the freezer compartment or the refrigerating compartment, whereby the delay in temperature rise and the temperature dispersion in the defrost refrigerator are reduced by 3 DEG C or more, And the temperature rise time is delayed by 250 minutes or more.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

Claims (10)

A freezer compartment door 15 for opening and closing the freezer compartment 12 of the refrigerator and a refrigerator compartment door 16 for opening and closing the refrigerating compartment 13 are provided in the freezer compartment 12 or the refrigerating compartment 13, And a guard 19 installed on the freezing chamber door 15 or the internal chamber door 16. The cooling chamber 12 or the freezing chamber 13 is provided with a chiller 19 during the normal operation of the refrigerator, The cold storage unit is provided on the outer circumferential surface of the inner case 18 constituting the refrigerator body 14 and constituting the inner wall of the freezer compartment 12 and the refrigerating compartment 13 of the refrigerator (61) arranged in a corrugated shape and a axial coolant (32) filled in the axial cold pipe (61)
The axial cold pipe 61 is in contact with the inner case 18 in a state of being embedded in the heat insulating material of the refrigerator main body 14 and the cap for blocking the inlet port of the axial cold pipe 61 is provided with an expansion And the expansion amount sucking means capable of absorbing the amount of the refrigerant is provided. delete delete delete The method according to claim 1,
The cold storage unit includes an evaporator for supplying cool air to the freezer compartment 12 and a storage space 72 in the duct body 25a of the duct 25 connecting the freezer compartment or the evaporator to the refrigerating compartment Further comprising a structure in which the axial space coolant (32) is injected into the internal space (72). delete delete delete delete A freezer compartment door 15 for opening and closing the freezer compartment 12 of the refrigerator and a refrigerator compartment door 16 for opening and closing the refrigerating compartment 13 are provided in the freezer compartment 12 or the refrigerating compartment 13, And a guard 19 installed on the freezing chamber door 15 or the internal chamber door 16. The cooling chamber 12 or the freezing chamber 13 is provided with a chiller 19 during the normal operation of the refrigerator, And a cold storage unit for storing the cold air of the freezing compartment 12 or the refrigerating compartment 13. The cold storage unit is provided with an inlet 41 which is drawn from the surface of the freezing compartment 12 or the refrigerating compartment 13, Wherein the cooling device is provided with a plate-shaped axial cooling pack 42 containing a cold material 32 so that the axial cooling pack 42 is not protruded so as not to occupy the space of the freezing chamber 12 or the freezing chamber 13. [ With refrigerator.

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