KR20080090927A - Refrigerator - Google Patents

Abstract

A refrigerator is provided to prevent freezing of a beverage even when a temperature of the supercooling chamber is lower than a set temperature by installing a magnetron in the supercooling chamber and oscillating microwave. A refrigerator comprises a body, a supercooling chamber(30), a magnetron(50), and a control unit(51). The supercooling chamber is installed in the body wherein cold air is supplied. The magnetron oscillates microwave to the supercooling chamber. The control unit controls intensity of the microwave that is oscillated from the magnetron.

Description

Refrigerator {Refrigerator}

1 is a front view showing a refrigerator of the present invention.

2 is a front sectional view of the refrigerator of FIG.

3 is a cross-sectional view taken along line II of FIG. 1.

4 is a view showing a mixing means provided in the mixing chamber in FIG.

5 is a plan sectional view showing the subcooling chamber of FIG.

6 and 7 are perspective views showing a first embodiment of the subcooling chamber.

8 is a perspective view showing a second embodiment of the subcooling chamber.

9 is a perspective view showing another application example of the second embodiment according to FIG.

10 is a perspective view showing another application example of the first embodiment according to FIGS. 5, 6, and 7;

FIG. 11 is a perspective view showing another example of application among other second embodiments in FIGS. 8 and 9; FIG.

* Description of symbols on the main parts of the drawings *

10: main body 21: refrigerator

22: freezing chamber 30: subcooling chamber

31: temperature sensor 32, 49: insulation

40: mixing chamber 41: first inlet

42: second intake port 44a, 44b: blowing fan

46: cold air supply port 47: mixing means

50: magnetron 51: shielding film member

53: current control unit 60: electrode unit, plate

61: voltage unit 62: voltage control unit

63: voltage converter 64: frequency converter

66: partition wall

The present invention relates to a refrigerator, and more particularly, to a refrigerator having a device for stably maintaining a supercooled state of a liquid beverage.

It is common to change liquid phase to a solid phase when the liquid beverage reaches a temperature below freezing point under 1 atm, but in some cases, the liquid beverage does not change into a solid phase but exists as a supercooled liquid. In this way, the liquid does not freeze below the freezing point and is in a supercooled liquid state, which is thermodynamically referred to as a metastable state. The subcooling liquid in the metastable state is not unstable, but it is also not stable, and when a disturbance is applied to the surroundings, a phase change occurs to a solid state instantaneously. Therefore, when the beverage preserved in the supercooled form is poured into a cold cup or subjected to shock or vibration to the beverage in the subcooled liquid state, it is possible to provide the consumer with a beverage that is completely frozen or not dissolved. Hereinafter, the beverage which is phase-changed into a solid phase by adding disturbance to the beverage in the subcooled liquid state is called a slush.

In this regard, Japanese Patent Laid-Open Publication No. 2003-214753 discloses a cooling apparatus for subcooling to improve an internal structure of a refrigerator main body so that a storage compartment in which a beverage is stored is cooled with a uniform temperature distribution. The disclosed prior art includes a cold air supply duct and a cold air suction duct respectively provided on both side walls of the storage compartment, and a connection duct installed on the upper wall of the storage compartment to connect the cold air supply duct and the cold air suction duct. Such a conventional cooling device continuously circulates cold air through a path consisting of a cold air supply duct, a storage compartment, a cold air suction duct, and a connection duct, thereby maintaining a uniform temperature distribution in the storage compartment.

It is also important to equalize the temperature distribution of the storage compartment in order to supercool the liquid beverage as disclosed in the prior art disclosed, but above all, in order to maintain a supercooled state of the liquid beverage and provide a high quality slush beverage to the consumer, the liquid beverage is stored. It is important to keep the temperature distribution over time of the yarn as uniform as possible. That is, even if the temperature of the storage room is kept constant on average, if the temperature in the storage room changes significantly with time, the beverage in the supercooled state is frozen when the temperature of the storage room is the lowest and the slush-type beverage is frozen. You can't make it.

However, the method of cooling the storage compartment by forming a separate cold air to maintain the liquid beverage in the supercooled state is not efficient in the following points. That is, a general refrigerator includes a freezer compartment and a refrigerating compartment. When a storage compartment for subcooling is to be implemented in such a conventional refrigerator, it is inefficient to install a separate evaporator for subcooling of beverages in terms of structure and cost.

Therefore, there is a need for a method capable of generating and supplying cool air suitable for supercooling a liquid beverage by utilizing the configuration and features of the existing general refrigerator having a freezer compartment and a refrigerator compartment.

  In addition, a variety of mixtures may be contained in the liquid beverage, and the freezing point of the various liquid beverages is different because the ratio of each mixture in the liquid beverage is different for each liquid beverage. This means that the temperatures required to supercool different liquid beverages are different. For example, A liquid beverage and B liquid beverage have different ratios of the mixtures contained in each other, and thus, each point is different, and the limit and cooling temperature (that is, the minimum temperature at which a liquid beverage can be kept supercooled. Frozen) is different. The limit and cooling temperature of liquid drink A and liquid drink B are -12 ℃ and -15 ℃ respectively, which means that liquid B is kept in supercooled state at -13 ℃ but A can be frozen at -13 ℃. do.

However, even though the ratio of the mixture contained in the liquid beverage is different, the limit for maintaining the supercooling state and the cooling temperature are different. However, in the case of a general liquid beverage, the supercooling temperature range for maintaining the supercooling state (i.e., the liquid beverage is maintained in the supercooled state) The range of the highest and lowest temperatures that can be achieved is generally similar.

Therefore, it is inefficient in terms of cost to manufacture various refrigerators for supplying the cold air required for subcooling according to various liquid drinks. Accordingly, a method for generating and supplying cool air suitable for supercooling a liquid beverage by utilizing the configuration and features of the existing general refrigerator having a freezer compartment and a refrigerating chamber as well as maintaining various liquid beverages in a supercooled state is required.

In addition, even if the liquid beverage is supplied with a cool air suitable for subcooling is likely to be frozen when the disturbance acts on the liquid beverage, even if disturbance is applied, a method for stably maintaining the supercooled state is required.

The present invention is to solve the above problems, an object of the present invention is to provide a refrigerator having a device for stably maintaining a supercooled state by suppressing the freezing of the liquid beverage.

The present invention has been made to achieve the above object, the refrigerator according to the present invention is a main body; and a subcooling chamber provided in the inside of the main body is supplied with cold air; and a microwave generator for oscillating microwaves in the subcooling chamber And a controller for controlling the intensity of the microwaves oscillated by the microwave generator.

In addition, the microwave generator is characterized in that the magnetron for oscillating microwaves.

In addition, the control device is characterized in that it comprises a shielding membrane member for adjusting the transmittance of the microwave oscillating in the magnetron in order to adjust the intensity of the microwave.

In addition, the shielding membrane member is characterized in that it is provided with a metal plate having a grid structure of a predetermined size.

In addition, the control device is characterized in that it comprises a current control unit for controlling the current applied to the magnetron in order to adjust the intensity of the microwaves in the subcooling chamber.

In addition, the microwave generator is characterized in that it comprises an electrode unit for forming an electric field in the subcooling chamber, and a voltage unit for applying an alternating voltage to the electrode unit.

In addition, the electrode unit is characterized in that the pair of plates provided on the wall side facing each other in the subcooling chamber.

In addition, the plate provided in the lower portion of the subcooling chamber is characterized in that the hole is provided so that the container containing the subcooling water is seated.

In addition, the control device is characterized in that it comprises a voltage control unit for controlling the voltage applied by the voltage unit in order to adjust the intensity of the microwave.

In addition, the voltage control unit is characterized in that it comprises a voltage converter for converting the magnitude of the voltage applied by the voltage unit, and a frequency converter for converting the frequency of the voltage applied by the voltage unit.

In addition, the magnitude of the voltage passing through the voltage converter is 2kV ~ 10kV, the frequency of the voltage passing through the frequency converter is characterized in that 100KHz ~ 1MHz.

The refrigerator according to the present invention includes: a main body; and a subcooling chamber provided inside the main body to supply cold air; and a partition wall partitioning the inner space of the subcooling chamber; and oscillating microwaves in a space divided by the partition wall portion. Microwave generator; and a control device for controlling the intensity of the microwave generated by the microwave generator.

The partition wall may be provided in plural.

Hereinafter, with reference to the accompanying drawings, an embodiment of a refrigerator according to the present invention will be described in detail.

1 is a front view illustrating a refrigerator according to the present invention, FIG. 2 is a front sectional view of the refrigerator of FIG. 1, and FIG. 3 is a cross-sectional view taken along line II of FIG. 1.

As shown in Figures 1 to 3, the refrigerator according to the present invention has a main body 10 with the front open. The main body 10 includes an external wound 11 forming an outer surface thereof and an internal wound 12 disposed at regular intervals from the external wound 11 to form a storage compartment 20 for storing food therein. . Insulation 13 is formed in the space between the outer box 11 and the inner box 12 to prevent cold air from being lost.

The storage compartment 20 is divided into the left and right sides by the middle partition 14 to form a refrigerating compartment 21 for refrigerating and storing food on the right side, and a freezing compartment 22 for freezing and storing food on the left side. The rear of the storage compartment 20 is provided with a cold air generating chamber 15 for generating cold air to be supplied to the storage compartment 20. The cold air generating chamber 15 is provided with an evaporator (not shown) that generates heat by heat exchange with ambient air, and a circulation fan (not shown) for supplying cold air to the storage chamber 20 is installed near the evaporator.

The refrigerator compartment door 21a and the freezer compartment door 22a are hinged to the front of the refrigerator compartment 21 and the freezer compartment 22 so as to open and close them, and each door 21a and 22a has a shelf 16 for storing food. ) Is provided.

The refrigerator according to the present invention has a subcooling chamber 30 provided inside the refrigerating chamber 21 to cool the liquid beverage to a freezing point or less to make the subcooling liquid.

The minimum temperature at which the liquid beverage can be supercooled (hereinafter referred to as 'limit and cooling temperature') is determined by several variables such as the type of liquid beverage, the material of the container in which the liquid beverage is stored, or the size of the container. However, if you limit the materials and sizes of some commonly used containers and ignore other low-impact variables (eg cooling rate), you can statistically process the experimental data to determine the type of liquid beverage. The appropriate subcooling temperature can be determined. For example, 200 ml of water in a glass container and repeated experiments, the average limit and the cooling temperature is -9 ° C, or a temperature slightly higher than this set temperature of the supercooling chamber 30 for water Can be defined as Experiments with different types of beverages in this way, it can be seen that the set temperature (T) of the subcooling chamber 30 is about -5 ° C ~ -12 ° C is suitable for a commonly used container. . This subcooling temperature range (ie, the range between the highest and lowest temperatures of a liquid beverage at which the liquid beverage can be maintained in a supercooled state) is determined by the general temperature of the freezing compartment 22 (-18 ° C to -21 ° C) and the refrigerating compartment ( Since it is between 21 ° C and 5 ° C, the proper mix of freezer and cold compartment cold air can be used to overcool the liquid beverage.

Accordingly, the refrigerator according to the present invention includes a mixing chamber provided inside the refrigerating chamber 21 to form cold air to be supplied to the subcooling chamber 30 by sucking and mixing cold air from the freezing chamber 22 and the refrigerating chamber 21, respectively. 40 and a controller 54 for controlling the amount of freezer compartment cold air and the amount of cold compartment cold air sucked into the mixing chamber 40 so that the temperature of the subcooling chamber 30 can maintain the set temperature.

The mixing chamber 40 has a first suction port 41 and a second suction port 42 for suctioning cold air from the freezing chamber 22 and the refrigerating chamber 21, respectively. When the mixing chamber 40 and the subcooling chamber 30 are provided inside the refrigerating chamber 21 as shown in FIGS. 2 and 3, the first suction port 41 penetrates the intermediate partition 14 to freeze the chamber 22. The second suction port 42 communicates with the refrigerating chamber 21 by passing through one side of the partition 43 separating the mixing chamber 40 and the refrigerating chamber 21. The first intake port 41 and the second intake port 42 have blowing fans 44a and 44b that provide power required to suck the freezing compartment cold air or the refrigerating compartment cold air, and whether or not the blower fans 44a and 44b are operated. A flap 45 for opening and closing the suction port 41 or the second suction port 42 is provided.

The mixing chamber 40 and the subcooling chamber 30 are disposed adjacent to each other and partitioned from each other by the partition plate 46a. The cold air mixed in the mixing chamber 40 is directly injected into the subcooling chamber 30. The mixing chamber 40 includes a cold air supply port 46 formed in the partition plate 46a.

The mixing chamber 40 includes a mixing means 47 for allowing the cold air sucked through the first suction port 41 and the second suction port 42 to move to the cold air supply port 46 to be mixed with each other to be in an equilibrium state. It is preferable to provide. The mixing means 47 may be composed of a mixing passage 47a formed between the first suction opening 41, the second suction opening 42, and the cold air supply opening 46. 4A is a cross-sectional plan view illustrating a mixing channel formed in the mixing chamber in FIG. 3. The mixing channel 47a is formed to be bent by at least one flow path forming plate 47b. In addition, the mixing means may be composed of a fan 47c that rotates in the mixing chamber 40 and promotes mixing of cold air as shown in FIG. 4B. The fan 47c is mounted in the mixing chamber 40 without a separate driving means such as a motor, rotates by receiving force from the flow of cold air sucked into the mixing chamber 40, and promotes mixing of the cold air.

The subcooling chamber 30 has a temperature sensor 31 installed to measure the temperature therein, and the controller 54 controls the temperature measured by the temperature sensor 31 and the set temperature of the subcooling chamber 30. In comparison, the suction amount of the freezing compartment cold air and the suction amount of the refrigerating compartment cold air are adjusted by controlling the operation of the blowing fans 44a and 44b according to the result. For example, if the set temperature of the subcooling chamber 30 is -7 ° C, and the temperature measured by the temperature sensor 31 is -5 ° C, the control unit 54 is the temperature of the mixed cold air is -7 ° C Blowing fan (44a, 44b) is controlled to be lowered to increase the suction ratio of the freezer cold air. As shown in FIG. 4, the temperature sensor 48 may be installed inside the mixing chamber 40, at which time the temperature sensor 48 may measure the temperature of the mixed cold air when supplied to the subcooling chamber 30. It is preferable to be installed around the cold air supply port 46 so that.

Meanwhile, the mixing chamber 40 and the subcooling chamber 30 may include the inside of the refrigerating chamber 21 and the mixing chamber 40 or the refrigerating chamber 21 and the subcooling chamber 30 so as not to be affected by the temperature inside the refrigerating chamber 21. Insulation material 49 and 32 which isolate | separate and block the leakage of cold air are provided.

In the refrigerator according to the present invention, the cold air temperature of the subcooling chamber 30 exists in the subcooling temperature band. However, in order to prevent the liquid beverage in the subcooled state from being frozen in the subcooling chamber 30, it is necessary to consider the effects of additional disturbance in addition to the temperature control. For example, liquid beverages in a metastable state may be frozen due to disturbances such as vibrations that may occur when opening or closing the doors of the doors 21a and 22a and vibrations caused by the compression of the compressor. A solution is required.

5 is a perspective view showing that the magnetron is provided in the subcooling chamber, FIG. 6 is a perspective view showing that the shielding film member is provided, and FIG. 7 is a perspective view showing that the current control unit is provided.

In the first embodiment according to the present invention, as shown in Figure 5, the magnetron 50 is installed in the center of the side wall of the subcooling chamber 30 so that the liquid beverage is stably maintained in the subcooling state. The magnetron 50 is a component used in a microwave oven, etc., and is composed of a copper anode, a cylindrical coil-shaped cathode, and a magnet such that a magnetic field is perpendicular between the anode and the cathode. The description is omitted for the sake of clarity.

The magnetron 50 oscillates microwaves into the subcooling chamber 30. Microwaves impose vibrational energy on the molecular structure of the liquid beverage, thereby preventing the molecular structure of the liquid beverage from stabilizing and thus preventing the liquid beverage from freezing. At this time, the intensity of the microwave should be enough to prevent the liquid beverage from warming up. To this end, control devices 51 and 53 for controlling the intensity of the microwaves are provided.

As shown in FIG. 6, the control device for the magnetron 50 is provided with a shielding film member 51 for controlling the intensity of the microwave by controlling the transmittance of the microwaves oscillating from the magnetron 50. The shielding film member 51 is formed of a metal plate having a lattice hole of a predetermined size. The shielding film member 51 has a substantially cube shape, and one surface is open. The shielding film member 51 accommodates the magnetron 50 therein and passes only a portion of the microwaves oscillated from the magnetron 50 to adjust the transmittance of the microwaves.

In addition, as shown in Figure 7, the control device 53 for the magnetron 50 is provided with a current control unit 53 for controlling the intensity of the microwave by controlling the frequency of the microwave oscillating in the magnetron 50. This is because it is possible to adjust the frequency of the microwaves oscillated by the magnetron 50 by controlling the current applied to the magnetron 50.

In designing or operating the shielding membrane member 51 or the current control unit 53 used as the control device 51 or 53, it is important to note that only the vibration energy of the microwave is transmitted to the liquid beverage to suppress freezing. It should be imposed, and the vibration energy transmitted to the liquid drink is large, preventing the freezing and at the same time, if the liquid drink is warmed due to the friction between the liquid drink molecules, the liquid drink can be out of the supercooled temperature range.

When the magnetron 50 is provided in the subcooling chamber 30 as described above, the subcooling chamber existing on the door 21a side in order to prevent the microwaves from penetrating the door 21a in the subcooling chamber 30 has a harmful effect on the user. A shielding film 52 is provided on the inner wall of 30 to prevent microwave transmission. In addition, a reflection plate (not shown) is installed on the inner wall of the subcooling chamber 30 in which the shielding film 52 is not installed so that microwaves are well transmitted to the liquid beverage.

The operation of the refrigerator according to the first embodiment of the present invention with reference to the gist of the present invention is as follows. When the set temperature of the subcooling chamber 30 is determined according to the type of beverage to be subcooled, the blowing fans 44a and 44b operate to operate the freezing chamber 22 from the freezing chamber 22 toward the mixing chamber 40 through the first suction port 41. Freezer compartment cold air flows in, and the refrigerator compartment cold air flows into the mixing chamber 40 from the refrigerating chamber 21 through the second suction port 42. The freezing chamber cold and the refrigerating chamber cold air sucked into the mixing chamber 40 are exchanged with each other while passing through the mixing flow passage 47a to be in an equilibrium state, and then supplied to the subcooling chamber 30 through the cold air supply port 46 to supply the subcooling chamber 30. Subcool the liquid beverage stored in

At this time, the temperature sensor 31 installed in the subcooling chamber 30 measures the temperature of the subcooling chamber 30. Data about the measured temperature is transmitted to the control unit 54, the control unit 54 compares the temperature measured by the temperature sensor 31 and the set temperature of the subcooling chamber 30 and the blowing fan 44a according to the comparison result 44b). Then, the suction amount of the freezer compartment cold air and the suction amount of the refrigerating compartment cold air are adjusted so that the temperature of the cold air mixed in the mixing chamber 40 is changed to a temperature close to the set temperature, and thus the subcooling chamber 30 can maintain the set temperature.

In addition, by controlling the intensity of the microwave through the shielding film member 51 or the current control unit 53, by continuously oscillating the microwave in the magnetron 50 with the cold air supplied to the subcooling chamber 30, the liquid phase in the supercooled state Even if disturbance is given to the beverage, the liquid beverage can be prevented from freezing, thereby maintaining a stable state of supercooling.

In FIG. 3, the mixing chamber 40 and the subcooling chamber 30 are installed in the refrigerating chamber 21, but the mixing chamber 40 and the subcooling chamber 30 may be disposed in the freezing chamber 22. In this case, however, the second suction port for suctioning the refrigerating chamber cold air passes through the intermediate partition wall to communicate with the refrigerating chamber.

The refrigerator according to the second embodiment of the present invention has a subcooling chamber 30 provided in the refrigerating chamber 21 to cool the liquid beverage to a freezing point or less to make the subcooling liquid, and stably maintains the subcooling state of the subcooling liquid. It has a microwave generator that oscillates the microwave so that it can be maintained.

Regarding controlling the temperature of the subcooling chamber 30 and having a mixing chamber 40 for mixing the cold air of the freezer compartment 22 and the cold air of the refrigerating compartment 21, the first embodiment according to the present invention will be described in detail. As shown. Therefore, hereinafter, only specific embodiments of the microwave generator will be described.

8 is a perspective view showing that the electrode unit is provided in the subcooling chamber.

As shown in FIG. 8, the refrigerator according to the second embodiment of the present invention includes an electrode unit 60 which forms an electric field in the subcooling chamber so that the liquid beverage is stably maintained in the subcooling state. Is provided with a voltage unit 61 for applying an alternating voltage. The electrode unit 60 is formed of a pair of plates and is provided one by one on the wall side facing each other in the subcooling chamber 30. In order to adjust the microwave intensity of the subcooling chamber 30, a voltage control unit 62 for controlling the voltage unit 61 for applying a voltage to the electrode unit 60 is provided.

The voltage control unit 62 is a control device of the refrigerator according to the second embodiment of the present invention. The voltage control unit 62 includes a voltage converter 63 for converting the magnitude of the voltage applied by the voltage unit 61 and a frequency converter 64 for converting the frequency of the voltage applied by the voltage unit 61. Equipped. Therefore, the voltage converter 63 amplifies the magnitude of the voltage applied from the voltage unit 61, and the frequency converter 64 amplifies the frequency applied from the voltage unit 61 at a high frequency.

 The microwaves in the subcooling chamber 30 are related to the electric field formed in the subcooling chamber 30, and such electric fields are related to the area of the plate 60 provided on the wall side of the subcooling chamber 30 and the distance between the plates 60. have. Therefore, in order to oscillate microwaves to stably maintain the liquid beverage in a supercooled state, considering the area between the plate 60 and the distance between the plates 60, the amplification degree of the voltage converter 63 and the frequency converter 64 The amount of amplification is determined. For example, when the horizontal length of the plate 60 is approximately 40 cm, the vertical length is approximately 50 cm, and the distance between the plates 60 is approximately 50 cm, the magnitude of the voltage converted by the voltage converter 63 is 2 kV to 10 kV. It exists in between, and the frequency converted by the frequency converter 64 should be present between 100kHz ~ 1MHz. The microwave formed when such an alternating voltage is applied to the electrode unit 60 imposes vibration energy on the molecular structure of the liquid beverage to prevent the liquid beverage from being frozen.

9 is a perspective view showing that the hole unit is provided in the electrode unit.

As shown in FIG. 9, an electrode unit 60 formed of a pair of plates is provided on the upper and lower walls of the subcooling chamber 30. In particular, the plate 65 is provided in the lower portion of the subcooling chamber 30 is provided with a hole 65 so as to seat the container containing the liquid beverage. When the container is seated in the hole 65, the liquid beverage is less sensitive to disturbances such as vibration.

The configuration related to the microwave generator for oscillating the microwaves in the subcooling chamber 30 and the configuration for the control device for controlling the intensity of the microwaves have been described in detail with reference to FIG. 8 and will not be described below.

10 and 11 are perspective views illustrating partition walls that divide an internal space of a subcooling chamber.

As shown in FIG. 10, the partition wall 66 is provided at the center of the subcooling chamber 30. The magnetrons 50 are provided for each divided space of the subcooling chamber 30. Therefore, as shown in FIGS. 5 to 7, the magnetron 50 is controlled by the shielding film member 51 or the current controller 53 to generate microwaves having different intensities for each divided space of the subcooling chamber 30.

 As shown in FIG. 11, a partition wall 66 is provided at the center of the subcooling chamber 30. An electrode unit 60 having a pair of plates is provided for each divided space of the subcooling chamber 30. Therefore, as shown in FIG. 8, the intensity of the electric field formed by the electrode unit 60 is controlled by the electric control unit 62 to generate microwaves having different intensities for each divided space of the subcooling chamber 30.

A plurality of partitions 66 provided in FIGS. 10 and 11 may be provided in plural to stably maintain the subcooled state of various liquid beverages.

As a result, when the limit, cooling temperature and subcooling temperature bands of the various liquid beverages cannot be placed together in the same subcooling chamber, it is possible to store various liquid beverages according to the limit, cooling temperature and subcooling temperature bands. For example, A liquid beverage has a limit and cooling temperature of -12 ° C and a subcooling temperature range of -5 ° C to -12 ° C, and a B liquid beverage has a limit and cooling temperature of -15 ° C and a subcooling temperature range of -10 ° C to In the case of -15 ° C, the liquid A and B liquid beverages are separated from each other and stored in different spaces of the subcooling chamber 30, and the microwaves having different intensities are oscillated so that the liquid A and B liquid beverages are respectively supercooled. Keep it stable.

In addition, by providing a microwave generator for oscillating the microwave in the subcooling chamber 30 as described in detail with reference to FIGS. 5 to 9, the temperature of the subcooling chamber is set temperature (-5 ℃ ~ -12 ℃) of the subcooling chamber Even lower, microwaves prevent the liquid beverage from freezing, increasing the degree of subcooling (that is, the degree to which the subcooled liquid beverage is stabilized or slushed). For example, a separate fan (not shown) is provided in the subcooling chamber 30 to lower the temperature of the subcooling chamber 30 than the set temperature of the subcooling chamber.

In this case, the liquid beverage is generally frozen out of the subcooling temperature band, but when the microwave is oscillated into the subcooling chamber 30, the freezing is suppressed to maintain the supercooling state. Therefore, the liquid beverage in such a state maintains a supercooled state at a lower temperature, so the liquid beverage has a higher degree of supercooling.

Through the configuration provided with a microwave generator as described above, the refrigerator according to the present invention has the effect of stably maintaining the supercooled state of the liquid beverage by inhibiting the freezing of the liquid beverage.

In addition, by providing a microwave generator for oscillating microwaves in the subcooling chamber 30, even if the temperature of the subcooling chamber becomes lower than the set temperature (-5 ° C to -12 ° C) of the subcooling chamber, the microwave liquid is frozen. To increase the degree of supercooling.

In addition, the subcooling chamber is divided into a microwave generating device for each space, so that the supercooling state of various liquid beverages can be stably maintained even when the subcooling temperature bands are different for various liquid beverages.

Claims (13)

Main body; and A subcooling chamber provided inside the main body and supplied with cold air; and A microwave generator for oscillating microwaves in the subcooling chamber; and A control device for controlling the intensity of the microwave oscillated by the microwave generator; Refrigerator equipped. The method of claim 1, The microwave generator is a refrigerator, characterized in that the magnetron for oscillating microwaves. The method of claim 2, The control device is a refrigerator, characterized in that provided with a shielding membrane member for controlling the transmittance of the microwave oscillating in the magnetron to adjust the intensity of the microwave. The method of claim 3, The shielding film member is a refrigerator, characterized in that provided with a metal plate having a grid structure of a predetermined size. The method of claim 2, The control device is a refrigerator, characterized in that the current control unit for controlling the current applied to the magnetron in order to adjust the intensity of the microwaves in the subcooling chamber. The method of claim 1, And the microwave generator includes an electrode unit forming an electric field inside the subcooling chamber, and a voltage unit applying an alternating voltage to the electrode unit. The method of claim 6, The electrode unit is a refrigerator, characterized in that a pair of plates provided on the wall side facing each other in the subcooling chamber. The method of claim 7, wherein The plate provided in the lower portion of the subcooling chamber is a refrigerator, characterized in that the hole is provided so that the container containing the subcooling water is seated. The method of claim 6, And the control device includes a voltage control unit for controlling a voltage applied by the voltage unit to adjust the intensity of the microwave. The method of claim 10, And the voltage control unit includes a voltage converting unit converting the magnitude of the voltage applied by the voltage unit, and a frequency converting unit converting the frequency of the voltage applied by the voltage unit. The method of claim 11, The voltage passing through the voltage converter is 2kV ~ 10kV, the frequency of the voltage passed through the frequency converter is characterized in that the refrigerator is 100KHz ~ 1MHz. With the body, A subcooling chamber provided inside the main body and supplied with cold air; and A partition wall partitioning the inner space of the subcooling chamber; and A microwave generator for oscillating microwaves in a space divided by the partition wall; and A control device for controlling the intensity of the microwave oscillated by the microwave generator; Refrigerator equipped. The method of claim 11, A refrigerator, characterized in that a plurality of partitions are provided.

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