KR101052701B1 - Freeze Storage - Google Patents

Abstract

The present invention is an outer casing having one side open, a drawer that can be pulled out and detached through an open side of the outer casing, located on one side of the outer casing, and a sensor for sensing the temperature of food placed in the drawer, the drawer facing the sensor. It is installed on one side, including a heat conducting member for transferring the temperature of the food in the drawer to the sensor and a heater installed in the outer casing, it is located in the cooling space, characterized in that it can be stored in the freezing state food freezing at subzero temperatures Provide a freeze free storage.

Freezing, supercooling, meat storage, sensor, sensitivity, box fan, calorific value

Description

Freeze Storage {SUPERCOOLING ROOM}

The present invention relates to a freezing storage for storing food at temperatures below freezing.

Subcooling means a phenomenon that no change occurs even when the melt or solid is cooled to below the phase transition temperature at equilibrium. Each substance has a stable state corresponding to the temperature at that time, so that the temperature can be gradually changed so that members of the substance can keep up with the temperature change while maintaining the stable state at each temperature. However, if the temperature suddenly changes, the member cannot afford to change to the stable state according to each temperature, so that the state remains stable at the starting point temperature, or a portion thereof changes to the state at the end point temperature.

For example, if water is gradually cooled, it will not temporarily solidify even if it reaches a temperature of 0 ° C or lower. However, when the object is in the supercooled state, it becomes a kind of metastable state, and the unstable equilibrium state is broken even by a slight stimulus, and it is easy to move to a more stable state. That is, when a small piece of material is added to the supercooled liquid or the liquid is suddenly shaken, the liquid starts to solidify immediately and the temperature of the liquid rises to the freezing point, thereby maintaining a stable equilibrium at that temperature.

BACKGROUND ART Conventionally, an electrostatic field atmosphere is created in a refrigerator, and thawing of meat and fish in the refrigerator is performed at a negative temperature. In addition to meat and fish, freshness of fruits is maintained.

This technique uses a supercooling phenomenon, which refers to a phenomenon in which the melt or solid does not change even when the melt or solid is cooled to below the phase transition temperature at equilibrium.

Such a technique includes the electrostatic field treatment method, the electrostatic field treatment device, and electrodes used in them.

1 is a view showing an embodiment of a thawing and freshness holding device according to the prior art, wherein the cold storage 1 is constituted by a heat insulator 2 and an outer wall 5, and the internal temperature control mechanism (not shown). Is installed. The metal shelf 7 installed in the interior of the storehouse has a two-stage structure, and on each stage, objects for thawing or freshness maintenance and ripening of vegetables, meat and fish are mounted. The metal shelf 7 is insulated from the bottom of the furnace by the insulator 9. The high voltage generator 3 can generate direct current and alternating voltage up to 0 to 5000 V, and the inside of the heat insulating material 2 is covered with an insulating plate 2a such as vinyl chloride. The high voltage cable 4 for outputting the voltage of the high voltage generator 3 is connected to the metal shelf 7 through the outer wall 5 and the heat insulator 2.

When the door 6 provided on the front side of the cold storage 1 is opened, the safety switch 13 (refer FIG. 2) which is not shown in figure is turned off, and the output of the high voltage generator 3 is interrupted | blocked.

2 is a circuit diagram showing the circuit configuration of the high voltage generator 3. AC 100V is supplied to the primary side of the voltage regulating transformer 15. Reference numeral 11 denotes a power supply lamp, and reference numeral 19 denotes a lamp indicating an operating state. The relay 14 operates when the above-mentioned door 6 is closed and the safety switch 13 is turned on. This state is indicated by the relay operation lamp 12. The relay contact ( 14a, 14b, and 14c are closed, and an AC 100V power source is applied to the primary side of the voltage regulating transformer 15.

The applied voltage is adjusted by the adjusting knob 15a on the secondary side of the voltage adjusting transformer 15, and the adjusted voltage value is displayed on the voltmeter. The adjusting knob 15a is connected to the primary side of the secondary boosting transformer 17 of the voltage adjusting transformer 15. In this boosting transformer 17, the boosting voltage is boosted at a ratio of 1:50, for example. When a voltage of 60V is applied, it is stepped up to 3000V.

_One end O ₁ of the secondary side output of the boosting transformer 17 is connected to the metal shelf 7 insulated from the cold storage via the high voltage cable 4, and the other end O _{2 of the} output is earthed. Moreover, since the outer wall 5 is earthed, even if the user of the cold storage 1 contacts the outer wall of the cold storage, electric shock will not occur. In addition, if the metal shelf 7 is exposed in the furnace in FIG. 1, since the metal shelf 7 needs to be kept insulated in the furnace, it is necessary to separate it from the walls of the furnace (the air insulates). . In addition, when the object 8 protrudes from the metal shelf 7 and contacts the inner wall, current flows to the ground through the high wall. Therefore, when the insulating plate 2a is attached to the inner wall, the drop of applied voltage is prevented. And even if the said metal shelf 7 is coat | covered with a vinyl chloride material etc. without exposing in the inside, the whole inside becomes an electric field atmosphere.

In the prior art, since an electric field or a magnetic field is applied to an object to be cooled and stored so that the object enters a supercooled state, a complicated device for generating an electric field or a magnetic field for storage in the supercooled state of the object is provided. High power consumption is required for the generation of such electric or magnetic fields. In addition, such a device for generating an electric field or a magnetic field is additionally provided with a device (for example, an electric field or magnetic field shielding structure, a blocking device, etc.) for the safety of the user when the electric field or the magnetic field is generated, when the electric field or magnetic field is generated due to the high power. Should be.

It is an object of the present invention to provide a freezing storage which can draw a drawer completely out of an outer casing.

Moreover, an object of this invention is to provide the freezing storage which can hold | maintain an object in a supercooled state only by supply of electric power, even in the space which only cooling is performed.

In addition, an object of the present invention is to provide a freezing storage that can selectively perform the supercooled state control and the frozen state control for the storage.

It is also an object of the present invention to provide a freezing storage that achieves the convenience of storage of an enclosure and the accurate sensing of the enclosure temperature.

In addition, an object of the present invention is to provide a non-freezing storage having a side mounted control unit for performing the supercooling state control and the freezing state control from the storage space of the storage.

The present invention is an outer casing having one side open, a drawer that can be pulled out and detached through an open side of the outer casing, located on one side of the outer casing, and a sensor for sensing the temperature of food placed in the drawer, the drawer facing the sensor. It is installed on one side, and includes a heat conducting member for transferring the temperature of the food in the drawer to the sensor and a heater installed in the outer casing, it is located in the cooling space can be stored in the freezing state food freezing at subzero temperatures Provide a freeze free storage.

In another aspect of the present invention, there is provided a freezing storage, characterized in that the heat insulating material is filled in the outer casing.

In another aspect of the present invention, the heat conducting member is located in the bottom surface of the drawer, characterized in that it comprises a metal plate and a contact portion for transmitting the temperature change between the metal plate and the sensor to which the temperature change of the food is transmitted; Provide storage.

In another aspect of the present invention, the contact portion provides a freezing storage, characterized in that protrudes downward from the bottom surface of the drawer.

In still another aspect of the present invention, an open side of an outer casing and a side of a drawer corresponding to the present invention provide a freezing storage device, characterized in that a handle is used for withdrawing the drawer.

In still another aspect of the present invention, the handle includes a grip portion and a hook portion movable in conjunction with the grip portion, and the outer casing provides a non-freezing storage unit, characterized in that the hook portion is provided with a hook portion.

In another aspect of the present invention, an open side of the outer casing and a side of the drawer corresponding to the present invention provide a freezing storage unit, characterized in that a gasket for sealing the inner space is provided.

In another aspect of the present invention, the outer casing and the drawer are each provided with guides for guiding the movement of the drawer, and the guides, when the drawer is fully inserted into the outer casing, move the position of the drawer in the outer casing when the drawer is moved. Provides a freeze-safe storage characterized by guiding it below the position of the drawer.

In another aspect of the present invention, there is provided a freezing storage device, characterized in that the sensor and the heat conducting member are in contact with each other when the drawer is inserted into the outer casing and moved downward by the guide portion.

In another aspect of the present invention, there is provided in the outer casing, and provides a freezing storage, characterized in that it further comprises a fan for flowing air in the air.

In addition, as another aspect of the present invention, the heater provides a freezing storage, characterized in that it comprises an upper heater installed on the upper surface in the outer case and a lower heater installed on the lower surface in the outer case.

In another aspect of the present invention, it is provided on the outer casing, and provides a freezing storage, characterized in that it further comprises a temperature sensor for detecting the temperature of the air in the drawer.

In another aspect of the present invention, a freezing storage, characterized in that the heating value of the upper heater is adjusted by the temperature measured by the temperature sensor, and the heating value of the lower heater by the temperature measured by the sensor. To provide.

In another aspect of the present invention, there is provided a freezing storage, characterized in that the heating values of the upper heater and the lower heater are controlled such that the temperature of the upper part of the refrigerator is approximately 1 to 2 ° C higher than the temperature of the lower part of the refrigerator.

In another aspect of the present invention, at least one of the upper heater and the lower heater is provided with a plurality of individual heaters, at least one of the plurality of individual heaters are always running, the remaining individual heaters according to the temperature in the It provides a freezing storage, characterized in that the on / off.

In another aspect of the present invention, the side casing, which is located on the side of the outer casing, and has a display portion and a button portion in front thereof, further provides a freezing storage.

In another aspect of the present invention, a control panel installed in the side casing, interlocked with the display unit, the button unit and the sensor, and controls the electrical equipment in the refrigerator; provides a freezing storage, characterized in that it further comprises.

The freezing storage provided by the present invention allows the drawer to be completely detached from the outer casing, which can be used more conveniently.

In addition, the non-freezing storage provided by the present invention can detect the temperature of the food more sensitively while the sensor is installed in the outer casing, thereby increasing the freezing stability and easily determining that the freezing state is terminated.

In addition, the non-freezing storage provided by the present invention, the control panel and a separate control panel and the refrigerator is provided on one side can easily control the function of the non-freezing storage.

In addition, the non-freezing storage provided by the present invention is provided with a plurality of heaters when performing the non-freezing function, the temperature in the non-freezing storage according to the heating value of the heater by controlling the amount of heat generated by the remaining heater in the state in which at least one heater is always operated. It is possible to reduce the fluctuation range of the sensor, and furthermore, it is possible to reduce the influence of the heating value of the heater on the sensor, thereby improving the sensitivity of the sensor to the termination of the freezing state.

In the following, the invention is described in detail by way of examples and the drawings.

3 is a view showing a process in which ice tuberculosis is generated in the liquid being cooled. As shown in FIG. 3, the container C which accommodates the liquid L (or the thing) is cooled in the storage S in which the cooling space was formed.

It is assumed that the cooling temperature of the cooling space is, for example, cooled from room temperature to 0 degrees (phase transition temperature of water) or below the phase transition temperature of the liquid L. When such cooling proceeds, for example, in the case of water, the temperature of the maximum ice crystal formation zone (-1 to -7 ° C) or less of the liquid (L) of water at which the maximum ice crystals are produced at about -1 to -7 ° C It is intended to maintain the supercooled state of water or liquid L (or containment) even at cooling temperatures below the maximum ice crystal generation zone.

Evaporation takes place from the liquid L during this cooling, so that the water vapor W1 flows into the gas (or space) Lg in the vessel C. When the vessel C is closed, due to the vaporized water vapor W1, the gas Cg may be in a supersaturated state.

As the cooling temperature reaches or passes the temperature of the maximum ice crystal generation zone of the liquid L, it is formed as freeze tuberculosis F2 on the inner wall of the container or freeze tuberculosis F1 in the gas Lg. Alternatively, condensation takes place at a portion where the surface Ls of the liquid L and the inner wall of the container C (which substantially coincide with the cooling temperature of the cooling space) are brought into ice and the condensed liquid L is ice crystals. The nucleus F3 may be formed.

For example, when the frozen tuberculosis F1 in the gas Lg descends and penetrates into the liquid L through the surface Ls of the liquid L, the supercooled state of the liquid L is released and the liquid ( A freezing phenomenon is caused in L), and the supercooling of the liquid L is released.

Alternatively, when the frozen tuberculosis F3 comes into contact with the surface Ls of the liquid L, the supercooled state of the liquid L is released, thereby causing a freezing phenomenon in the liquid L. FIG.

As described above, looking at the process of formation of freezing tubers F1 to F3, when the liquid L is stored below the temperature of the maximum ice crystal generation zone of the liquid L, it is evaporated from the liquid L, and the liquid Due to freezing of water vapor on the surface Ls of (L) and freezing at the inner wall of the container C near the surface Ls of the liquid L, the release of the supercooled state of the liquid L is prevented. Is caused.

4 is a view showing a process for preventing the formation of ice tuberculosis applied to the supercooling apparatus according to the present invention.

4 shows energy at least on the surface Ls of the gas Lg or the liquid L so as to prevent the freezing of the water vapor W1 in the gas Lg, ie to maintain the water vapor W1 state continuously. The temperature of the gas Lg or the surface Ls of the liquid L is applied to be higher than the temperature of the maximum ice crystal generation zone of the liquid L. More preferably, the phase transition temperature of the liquid L is equal to or higher than that of the liquid L. . In addition, the temperature of the surface Ls of the liquid L is set to the temperature of the maximum ice crystal generation zone of the liquid L so that the surface Ls of the liquid L does not freeze even if it contacts the inner wall of the container C. More preferably, the phase transition temperature of the liquid L is equal to or higher than that.

As a result, the liquid L in the container C is maintained in the supercooled state at or below the phase transition temperature or below the maximum ice crystal generation temperature of the liquid L.

In addition, when the cooling temperature in the storage S is very low, for example, -20 ° C, the liquid L, which is an object, may be subjected to a supercooling state simply by applying energy only to the upper portion of the container C. Since it may not be able to hold | maintain, it is necessary to supply some energy also to the lower part of the container C. The energy applied to the upper portion of the vessel C is relatively larger than the energy applied to the lower portion of the vessel C, so that the upper temperature of the vessel C can be maintained higher than the phase transition temperature or the temperature of the maximum ice crystal generation zone. . In addition, it is possible to control the temperature in the supercooled state of the liquid (L) by the energy applied to the lower portion of the container (C) and the energy applied to the upper portion of the container (C).

3 and 4 described above, the case of the liquid (L) has been exemplarily described, but even in the case of the case containing the liquid, the fresh long-term storage of the object is possible by continuously supercooling the liquid in the object, By applying the process of the enclosure may be maintained in the supercooled state below the phase transition temperature. Receptacles herein can include meat, vegetables, fruits, other foods, and the like, as well as liquids.

In addition, the energy applied to the present invention may be applied to thermal energy, electric or magnetic energy, ultrasonic energy, light energy and the like.

5 is a schematic configuration diagram of a supercooling apparatus according to the present invention.

The supercooling apparatus of FIG. 5 is mounted in a storage S in which cooling is performed, a case Sr having a storage space therein, a heating coil H1 mounted inside an upper surface of the case Sr, and generates heat; The temperature sensor C1 for sensing the temperature of the upper portion of the storage space, the heating coil H2 mounted inside the lower surface of the case Sr to generate heat, and the temperature of the lower portion or the storage object P of the storage space. It is provided with a temperature sensor (C2) for sensing.

 The supercooling device is installed in the storage S and, as cooling is performed, senses the temperature from the temperature sensor C1 and C2 so that the heating coils H1 and H2 perform the on operation. Thus, heat is supplied to the storage space from the upper and lower portions of the storage space. The amount of heat supplied is adjusted to control the upper portion of the storage space (or the air on the object P) to be higher than the maximum ice crystal generation temperature, more preferably higher than the phase transition temperature.

The positions of the heating coils H1 and H2 of FIG. 5 may be determined to be suitable positions for supplying heat (or energy) to the enclosure P and the storage space, and may be inserted into the side surface of the case Sr. Can be.

FIG. 6 is a graph illustrating a supercooling state of water according to the subcooling apparatus of FIG. 5. The graphs of FIG. 6 are temperature graphs measured with the principle according to FIGS. 4 and 5 applied when the liquid L is water.

As shown in FIG. 6, line I is the cooling temperature curve of the cooling space, and line II is the temperature curve of the gas Lg (air) on the water surface in the vessel C or the case Sr (or the vessel C). ), The upper temperature of the case (Sr)), the line III is the temperature of the lower portion of the container (C) or the case (Sr), the temperature of the outer surface of the container (C) or the case (Sr) is the container (C) or It is substantially the same as the temperature of the water in the case Sr.

As shown, when the cooling temperature is maintained at about −19 to −20 ° C. (see line I), the temperature of the gas Lg on the water surface in the vessel C is about higher than the temperature of the maximum ice crystal generation zone of the water. When maintained at 4-6 ° C, the supercooled state in which the liquid state is maintained stably is maintained for a long time while the temperature of the water in the vessel C is maintained at about -11 ° C, which is equal to or less than the temperature of the maximum ice crystal generation zone of the water. At this time, heat is supplied by the heating coils H1 and H2.

In addition, in FIG. 6, as the cooling proceeds, before the temperature of the water reaches the temperature of the maximum ice crystal formation zone, more preferably, before the phase transition temperature is reached, the gas (Lg) phase on the water surface or on the surface The application of energy to the furnace is started, so that the water enters and maintains the supercooled state more stably.

Figure 7 is an exploded perspective view of a non-freezing storage according to an embodiment of the present invention, Figure 8 is a perspective view of a non-freezing storage according to an embodiment of the present invention, Figure 9 is a freezing storage according to an embodiment of the present invention The cross section of FIG.

The freezing storage according to an embodiment of the present invention largely includes an outer casing 100, a drawer 200 and the side casing (300). The drawer 200 may be inserted into and withdrawn from the outer casing 100, and since the electronic device is not attached to the drawer 200, the drawer 200 may be completely detached from the outer casing 100 and detachable. The outer casing 100 includes a heat insulator 110 to insulate the freezing storage from other areas in the refrigerator where the freezing storage is located. The drawer 200 and the side casing 300 may also include heat insulating materials 210 and 310, respectively, to insulate portions where heat insulation is not sufficiently performed by only the heat insulating material 110 of the outer casing 100. The heater 140 is installed inside the outer casing 100, and the heat generation amount of the heater 140 is controlled by a controller (not shown) to control the temperature of the freezing storage. The heater 140 includes an upper heater 142 and a lower heater 144, and the calorific values of the upper heater 142 and the lower heater 144 are respectively adjusted by a controller (not shown). In addition, an upper temperature sensor 132 for measuring the temperature of the freezing storage is installed on the upper side of the outer casing (100). In order to minimize the influence of the heat of the heater 140 on the temperature sensor 132 in the interior of the high temperature sensor 132, the heater 140 is located close to the position, and the heater 140 and the temperature in the interior A separate insulating member (not shown) may be further provided between the detection sensors 132. In addition, the lower portion of the outer casing 100 is provided with sensors 134, 136 for detecting the temperature of the food. The sensors 134 and 136 measure the temperature of the food located in the drawer 200, and if the food is widely distributed in the drawer 200, the sensor 134, 136 may be configured to better reflect the temperature of the food in the operation of the freezing storage. It is preferable to be provided in plural at intervals of. In the embodiment, two sensors 134 and 136 are provided, but three or more sensors may be provided. The sensors 134 and 136 are not installed in the drawer 200 in contact with the food, but are installed in the outer casing 100, thereby transferring power to the sensors 134 and 136 to the drawer 200 and transmitting temperature sensing information. Since the cable for receiving can be deleted, the drawer 200 can be completely withdrawn from the outer casing 100. If the drawer 200 is not fully withdrawn from the outer casing 100, it is inconvenient to put food in or out of the drawer 200, and it is quite inconvenient to clean the drawer 200. The sensors 134 and 136 are attached to the lower surfaces of the sensor mounting portions 134a and 136a of the metal sheet that are attached to the lower surfaces of the outer casing 100 so that the sensors 134 and 136 are exposed to the outside of the outer casing 100. Prevent it.

FIG. 10 illustrates a metal plate installed in a drawer of a non-freezing storage according to an embodiment of the present invention, and FIG. 11 is a view illustrating a metal plate installed in a drawer of a freezing storage according to an embodiment of the present invention. . As described above, since the freezer storage according to the embodiment of the present invention draws the drawer 200 completely from the outer casing 100 and can be detached, the sensors 134 and 136 are positioned in the drawer 200. Since it is located in the outer casing 100 without having the disadvantage that the sensitivity of sensing the temperature of the food stored in the drawer 200 may be reduced. In order to compensate for this, in the basket 230 of the drawer 200, the temperature change of the metal plate 232 and the metal plate 232 to which the temperature change of the food distributed in the drawer 200 is transmitted is transferred to the sensors 134 and 136. Contact portions 234 and 236 are provided. The contact portions 234 and 236 penetrate the bottom surface of the basket 230 and protrude downward. When the drawer 200 is fully inserted into the outer casing 100, the sensor installation portions 134a and 136a and the contact portion 234 are provided. 236 can be contacted without a gap to better convey the temperature of the food to the sensors 134, 136.

FIG. 12 is a view illustrating a process in which a drawer of a freezing storage of the present invention is inserted into an outer casing, and FIG. 13 is a view showing a state in which a contact portion and a sensor installation portion of the freezing storage of the present invention are in contact with each other. The drawer 200 included in the freezing storage according to the embodiment of the present invention includes contact portions 234 and 236 protruding downward from the bottom surface of the basket 230, and the contact portions 234 and 236 are sensors. The sensors 134 and 136 may better sense the temperature of the food only when the contacts 134a and 136a are contacted without a gap. However, if the contact portions 234, 236 keep in contact with the outer casing 100 and cause friction while the drawer 200 moves within the outer casing 100, the contact portions 234, 236 and the outer casing 100 are frictional. There is a problem that excessive force is required at the time of abrasion, noise due to friction, and insertion and withdrawal. Accordingly, the contact portions 234 and 236 form a predetermined interval with the lower surface of the outer casing 100 when the drawer 200 moves in the outer casing 100, and the drawer 200 moves into the outer casing 100. When fully inserted, the contact portions 234 and 236 preferably contact the sensor mounting portions 134a and 136a. To this end, the outer casing 100 and the drawer 200 are provided with guides 120 and 220 (shown in FIG. 9) for guiding a moving position of the drawer 200 in the outer casing 100 at positions corresponding to each other. do.

The guides 120 and 220 include rails 122 and 222 and rollers 124 and 224, respectively. When the drawer 200 is inserted into the outer casing 100, the outer casing 100 and the drawer 200 of the drawer 200 are first formed. The rollers 124, 224 contact each other, and then the roller 224 of the drawer 200 rolls over the rail 122 of the outer casing 100 and at the same time the drawer 200 over the roller 124 of the outer casing 100. As the rail 222 of the roll rolls, the drawer 200 is inserted into the outer casing 100. The rail 122 of the outer casing 100 is obliquely inclined downward so that the drawer 200 is positioned downward from the rear of the outer casing 100, and the roller 224 of the drawer 200 is inclined due to the inclined portion. In order to prevent deviation from the rail 122 of the outer casing 100, it is preferable that the rear portion is blocked with a width that can accommodate the roller 224. In addition, when the drawer 200 descends from the rear of the outer casing 100 downward, the front of the rail 222 of the drawer 200 is the outer casing 124 to avoid interference with the roller 124 of the outer casing 100. The step is formed to accommodate the roller 124 of the). Therefore, referring to the drawing, in the process of the drawer 200 is inserted into the outer casing 100 to move the contact portion 234, 236 at a predetermined distance from the lower surface of the outer casing 100 to move without interference and friction Can be. In addition, when the drawer 200 is fully inserted into the outer casing 100, the drawer 200 is moved downward by the guide parts 120 and 220, and the contact parts 234 and 236 are provided with the sensor installation part 134a,. 136a) is in full contact.

14 is an exploded perspective view illustrating a front part of a drawer included in a freezing storage device according to an embodiment of the present invention. 7 and 14, the front portion of the drawer 200 forms a skeleton of the front portion of the drawer 200 and connects the front frame 240 and the front of the front frame 240 to the basket 230. The cover 150 is attached to the rear of the front frame 240, the gasket 260 to seal between the outer casing 100 and the drawer 200 when the drawer 200 is closed, the drawer 200 is closed At the hook portion 272 to secure the outer casing 100 and the drawer 200 in close contact, the elastic member 274 and the hook portion 272 to apply an elastic force to the hook portion 272 can be unlocked. Grip 276. In addition, the heat insulating material 210 of the drawer 200 is filled in the front frame 240.

When the drawer 200 is withdrawn or inserted from the outer casing 100, the cover 250 may be grasped and the drawer 200 may be inserted or withdrawn, and the handle 252 may be disposed on the cover 250 for the user's convenience. ) Is formed. The handle 252 is a shape for easily withdrawing the drawer 200 from the outer casing 100, any shape may be used. However, while releasing the locking state of the hook portion 272 by squeezing the grip portion 276, the handle 252 is a groove shape that is formed in the front lower side of the cover 250 so that the drawer 200 can be pulled out at the same time. It will be more convenient. However, if the position of the grip part 276 is changed, the position of the handle 252 may also be changed to a position where the grip part 276 may be gripped and the drawer 200 may be pulled out at the same time.

The freezing store needs to be reliably insulated from other areas in the refrigerator to maintain the freezing state of the food as described above. At this time, the portion where the heat exchange or heat leakage is most likely to occur with other areas in the refrigerator is a gap between the drawer 200 and the outer casing 100 located in front. Accordingly, the gasket 260 is attached to a portion in contact with the front portion of the outer casing 100 at the rear portion of the front frame 240 to more ensure the insulation of the drawer 200 and the outer casing 100. The gasket 260 is made of an elastic material such as natural rubber or synthetic rubber, and the drawer 200 and the outer casing 100 receive deformation from the drawer 200 and the outer casing 100 between the drawer 200 and the drawer ( The gap between the outer casing 200 and the outer casing 100 is sealed.

As described above, the drawer 200 is guided to move downwards when the guides 120, 220 (shown in FIG. 11) are fully inserted into the outer casing 100, and the guides 120, 220: shown in FIG. Since it is inclined obliquely in the rear, it is forced backward and downward by its own weight. Therefore, when the drawer 200 is fully inserted, the gasket 260 may deform and seal the gap between the drawer 200 and the outer casing 100 by the weight of the drawer 200. The non-freezing storage according to the embodiment of the present invention further includes a hook portion 172 and a hook portion 272 for locking the outer casing 100 and the drawer 200 in order to seal more securely. In order to manipulate the hook portion 272, the grip portion 276 is positioned inside the handle 252 of the cover 250, and the grip portion 276 is rotatably coupled to the front frame 240. When the user grasps the grip 252 together with the grip 276 while holding the grip 276, the grip part 276a is positioned on both sides of the grip 276 and is coupled to the cover 250. As the 276 rotates, the upper portion of the grip portion 276 pushes the lower portion of the hook portion 272. The hook portion 272 also rotates around the coupling portion 272a coupled to the cover 250, while the upper portion of the hook portion 272 is lifted from the hook portion 172 of the outer casing 100, and the hook portion 272 and the engaging portion 172 is released so that the user can draw the drawer 200 from the outer casing (100). At this time, the upper portion of the hook portion 272 is elastically fixed at both ends by the hook portion 272 and the cover 250 so that the upper portion of the hook portion 272 can be firmly fixed while pressing the locking portion 172 of the outer casing 100. Member 274 is included. When the grip part 276 is gripped, the upper part of the hook part 272 is lifted and the elastic member 274 is deformed. When the grip part 276 is released, the upper part of the hook part 272 is lifted by the restoring force of the elastic member 274. Will move down again. By fixing the outer casing 100 and the drawer 200 by the hook portion 272 and the locking portion 172, there is an advantage that can be more securely sealed between the outer casing 100 and the drawer 200. .

15 is an exploded perspective view of the side casing provided in the freezing storage according to an embodiment of the present invention.

In the side casing 300, a heat insulating material 310, a control panel (not shown), a control panel mounting part 320, an operation panel (not shown), and an operation panel mounting part 330 are installed. The operation panel (not shown) includes button portions 315a, 315b, 315c, and 315d for inputting a function of the non-freezing storage, and a display portion 316 for displaying the selected functions. The buttons 315a, 315b, While displaying the function input through the 315c and 315d on the display unit 316, the information on the received function is transmitted to the control panel (not shown). The side casing 300 is preferably provided with a window (hole) in a corresponding position so that the button portion (315a, 315b, 315c, 315d) and the display portion 316 of the PCB control board can be exposed to the outside. Since the button portions 315a, 315b, 315c, and 315d and the display portion 316 are located in the side casing 300 instead of the drawer 200, the drawer 200 is completely detachable from the outer casing 100. The button sections 315a, 315b, 315c, and 315d have a button 315a for selecting a thin ice function, a button 315b for selecting a freezing function, a button 315c for selecting a supercooling function, and a power supply for the freezing storage. And a button 315d for turning off. The display unit 316 displays an on / off state of the power supply of the non-freezing storage 100 and a function currently being performed in the non-freezing storage. When the user turns on the freezing storage unit through the button 315d and selects the ice function through the button 315a, the control panel (not shown) receives an input signal from the button 315a and displays the display unit 316. Indicates that the refrigeration function has been selected. In addition, the control panel (not shown) adjusts the calorific value of the heater 140 installed in the outer casing 100 (shown in FIG. 8) so that the temperature in the freezing storage is within a temperature range of approximately -5 ° C to -8 ° C. . The control panel (not shown) adjusts the heat output of the heater 140 through the internal temperature sensor 132 and the sensors 134 and 136 to control the temperature in the freezing storage to be within a desired temperature range. For example, if you use meat free mode to store meat in an unfrozen vault, you can easily chop meat with slightly frozen ice. In addition, when the refrigeration function is selected through the button 115b, the control panel (not shown) turns off all the heaters 140, and allows food to be stored at the same temperature as other areas of the refrigerator without separate temperature control. On the other hand, when the non-freezing function is selected through the button 115c, the control panel (not shown) may control the sensors 132, 134, and 136 so that the temperature in the non-freezing storage maintains a temperature of approximately -2 ° C to -4 ° C. Through controlling the heat of the heater 140 while continuously detecting the temperature of the food and the temperature of the food freezing through. If the meat is stored without freezing at subzero temperatures due to the freezing function, ice crystals are formed in the meat, and the fiber of the meat is destroyed to prevent the deterioration of taste.

On the other hand, during the storage of meat in a non-freezing warehouse by selecting the freezing function, there is a case where the freezing condition is broken due to an impact or partial unbalance in temperature. Even when ice crystals form in some portions, freezing is likely to spread throughout the meat. In addition, when freezing is started, the temperature rises rapidly to around 0 ° C., which is a phase transition temperature. When a sudden change in temperature is detected through the sensors 134 and 136, it is determined that the stored food such as meat is frozen and freezes. Thaw the food in the vault, then store the food freeze again. In order to thaw food in a freezing store, it is preferable to raise it to normal temperature, the temperature of at least 2 degreeC, hold | maintain this temperature for a predetermined time, thaw it sufficiently, and store it in a freezing state again.

On the other hand, when the non-freezing function is selected, the control panel (not shown) uses the internal temperature sensor 132 and the sensors 134 and 136, and the temperature in the refrigerator is -2 ° C to -4 ° C through a predetermined algorithm. The amount of heat generated by the heater 140 may be adjusted to maintain the temperature of the heater 140. However, simply by using the temperature detected by the temperature sensor 132 in the high temperature, by adjusting the calorific value of the upper heater 142 so that the temperature of the upper part in the freezing storage is maintained at a temperature of about -2 ℃ or around, the sensor 134 , 136 may be used to control the calorific value of the lower heater 144 to simply control the temperature of the lower part in the freezing storage to be maintained at approximately -3 ℃ ~ -4 ℃.

Meanwhile, a box fan (not shown) in an inner space of one side of the outer casing 100 (for example, a rear portion of the outer casing) or the inner side of the side casing 300 without interference between the outer casing 100 and the drawer 200. It can be installed to form a forced flow in the freezing storage. If a box fan (not shown) is formed in the inner space of the side casing 300, the side casing 300 and the side casing 300 may be forced to flow inside the outer casing 100 where the basket 230 is located. A flow hole (not shown) should be further formed between the outer casings 100. When a box fan (not shown) is installed and forced flow occurs, the temperature distribution in the non-freezing storage becomes uniform, so that the sensitivity of the sensors 134 and 136 to detect the freezing is improved. FIG. 16 is a graph illustrating a temperature change of food detected by a sensor when a box fan is not installed, and FIG. 17 is a graph illustrating a temperature change of food detected by a sensor when a box fan is installed. Comparing the two graphs, when the box fan is not installed, the temperature measured by the sensors 134 and 136 continuously fluctuates within the range where the fluctuation range is not large. It can be seen that temperature fluctuations are clearly divided into very large intervals. Therefore, even if a box fan (not shown) is used, even if the same sensors 134 and 136 are used, not only the heating value of the heater 140 can be controlled to maintain the supercooling state more reliably, but also the supercooling is terminated (that is, freezing). It is easier to judge what has started.

Meanwhile, the heater 140, that is, each of the upper heater 142 and the lower heater 144 may include a plurality of heaters. When the freezing storage performs the freezing function, each of the plurality of upper heaters 142 and the lower heaters 144 is operated with at least one heater always turned on, and the remaining heaters have the internal temperature sensing sensor 132. And on / off in accordance with the measurement temperatures of the sensors 134, 136. Thus, when the upper heater 142 and the lower heater 144 are each composed of a plurality of heaters, the fluctuation range of the internal temperature according to the amount of heat generated by the heater is small compared to turning on / off a single heater. Therefore, it is easy to distinguish between the fluctuation of the temperature due to the on / off of the heater and the fluctuation of the temperature due to the termination of the subcooling, and thus can easily determine the subcooling termination. In addition to the large fluctuation in temperature, the small fluctuation in temperature not only increases the supercooling stability but also increases the freshness of the food.

1 is a view showing an embodiment of a thawing and freshness holding device according to the prior art;

2 is a circuit diagram showing a circuit configuration of a high voltage generator;

3 is a view showing a process of generating ice tuberculosis in the liquid being cooled,

4 is a view showing a process for preventing the formation of ice tuberculosis applied to the supercooling apparatus according to the present invention,

5 is a schematic configuration diagram of a supercooling apparatus according to the present invention;

6 is a supercooled state graph of water according to the subcooling device of FIG. 5,

Figure 7 is an exploded perspective view of a freezing storage according to an embodiment of the present invention,

8 is a perspective view of a freezing storage according to an embodiment of the present invention,

9 is a view showing a cross section of the freezing storage according to an embodiment of the present invention,

10 is a view showing a metal plate installed in the drawer of the freezing storage according to an embodiment of the present invention,

11 is a view showing that a metal plate is installed in the drawer of the freezing storage according to an embodiment of the present invention,

12 is a view illustrating a process in which a drawer of a freezing storage of the present invention is inserted into an outer casing;

13 is a view showing a state in which the contact portion and the sensor installation portion of the non-freezing storage of the present invention in contact with,

14 is an exploded perspective view illustrating a front part of a drawer included in a freezing storage according to an embodiment of the present invention;

15 is an exploded perspective view of a side casing provided by a freezing storage according to an embodiment of the present invention;

16 is a graph showing the temperature change of the food detected by the sensor when the box fan is not installed,

17 is a graph showing the temperature change of the food sensed by the sensor when the box fan is installed.

Claims (17)

An outer casing with one side open; A drawer that can be pulled out and detached through an open side of the outer casing; Located on the bottom surface of the outer casing, the sensor for sensing the temperature of the food located in the drawer; A heat conduction member installed on a bottom surface of the drawer adjacent to the sensor and transmitting a temperature of food in the drawer to the sensor; And Heater is installed in the outer casing; including, it is located in the cooling space freezing storage, characterized in that food can be stored in a freezing state at sub-zero temperatures. The method of claim 1, A freezing storage room, characterized in that the insulation is filled in the outer casing. The method of claim 1, The heat conducting member has a metal plate which is located on the bottom surface of the drawer and has a contact portion for transferring the temperature change between the metal plate and the sensor to which the temperature change of the food is transmitted. The method of claim 3, The contact portion is freezing storage, characterized in that protruding downward from the bottom surface of the drawer. The method of claim 1, The open side of the outer casing and the corresponding side of the drawer, the freezing storage, characterized in that the handle is used for withdrawal of the drawer. The method of claim 5, The handle has a grip portion and a hook portion that moves in conjunction with the grip portion, The outer casing, the freezing storage, characterized in that the hook portion is provided with a hook portion. The method of claim 1, The open side of the outer casing and the corresponding side of the drawer, the freezing storage, characterized in that the gasket for sealing the inner space is provided. The method of claim 1, The outer casing and drawer are each provided with guides to guide the movement of the drawer, And the guide guides the drawer's position in the outer casing to be below the position of the drawer during movement when the drawer is fully inserted into the outer casing. The method of claim 8, And the sensor is in contact with the heat conducting member when the drawer is inserted into the outer casing and moved downward by the guide. The method of claim 1, And a fan installed in the outer casing and allowing air to flow in the go. The method of claim 1, The heater is a freezing storage, characterized in that it comprises an upper heater installed on the upper surface in the outer case and a lower heater installed on the lower surface in the outer case. The method of claim 11, It is installed on the upper casing, the inside of the drawer temperature sensing sensor for sensing the temperature of the air in the drawer; freezing storage further comprising a. The method of claim 12, The heating value of the upper heater is controlled by the temperature measured by the internal temperature sensor, Non-freezing storage, characterized in that the heating value of the lower heater is adjusted by the temperature measured by a sensor for detecting the temperature of food. The method of claim 12, Non-freezing storage, characterized in that the heating value of the upper heater and the lower heater is controlled so that the temperature of the upper portion of the furnace is 1 ~ 2 ℃ higher than the temperature of the lower portion. The method of claim 12, At least one of the upper heater and the lower heater includes a plurality of individual heaters, At least one of the plurality of individual heaters are always running, the remaining individual heater is freezing storage, characterized in that the on / off according to the temperature in the refrigerator. The method of claim 1, The side casing is located on the side of the outer casing, the front casing having a display portion and a button portion; further comprising a freezing storage. The method of claim 16, The control panel is installed in the side casing, and interlocked with the display unit, the button unit and the sensor, and controls the electrical equipment in the refrigerator.

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