ICE MAKER FOR REFRIGERATOR
Disclosed is an ice maker for a refrigerator. The ice maker is further provided with an ice making evaporator in addition to an evaporator for cooling a refrigerating chamber of a freezing chamber, and the ice making evaporator is sunk in water to generate ice, thereby quickly creating transparent ice. The ice maker can also be disposed in the refrigerating chamber or a refrigerating chamber door, thus to prevent ice from being formed with air bubble remaining in water, resulting in enhancing transparency of ice. In addition, even if the ice maker is disposed in the refrigerating chamber door, cold air is not needed to be induced from the freezing chamber, which allows independent operations of the freezing chamber and the ice maker, thereby increasing energy efficiency.
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The present invention relates to an ice maker employed in a refrigerator.
BACKGROUND ARTIn recent time, large-sized refrigerators are provided with ice makers therein for making ice pieces. The ice maker is configured such that a certain amount of water supplied in an ice making tray is iced by applying cold air and then the ice in the tray is carried to an ice storing container for storage.
In such ice maker, the ice making tray is disposed under a condition having an ice point (freezing point) lower than 0° C., such as a freezing chamber, so as to freeze water by cold air. Hence, a portion where cold air first reaches starts to be iced, and such icing is advanced toward a central direction. For example, the is surface of the water which is first contacted by its surrounding cold air start to be iced to form a core of ice. Such icing is in progress toward the center of the water once the core of ice is formed, thereby generating ice eventually.
However, the related art ice maker is configured to be disposed in the freezing chamber to freeze water using cold air cooling the freezing chamber or configured to freeze water by inducing cold air of the freezing chamber to a refrigerating chamber door even if it is installed in the refrigerating chamber door. Accordingly, a loss occurs due to a convection heat transfer, which lowers icing speed.
Furthermore, water supplied to the ice making tray contains a certain amount of air. Such air is separated from the water during the process of freezing the water in the ice making tray, so as to exist in the form of air bubble. However, as mentioned above, during the icing process, the surface of water is first frozen by the cold air of the freezing chamber. As a result, such air bubble in the water is not discharged outwardly but remains, which causes a generation of opaque ice.
DISCLOSURE Technical SolutionTherefore, to solve the problems of the related art ice maker for a refrigerator, an object of the present invention is to provide an ice maker for a refrigerator capable of enhancing an icing speed.
Another object of the present invention is to provide an ice maker for a refrigerator capable of facilitating the generation of transparent ice by allowing air bubble separated from water during an icing process to be quickly discharged out of the water.
To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided a refrigerator including: a refrigerator main body having at least one chamber and at least one door for opening/closing the at least one chamber; a compressor disposed in the refrigerator main body; a condenser disposed in the refrigerator main body and connected to the compressor; a cooling evaporator disposed in the refrigerator main body and connected to the condenser so as to supply cold air into the chamber; and an ice making evaporator disposed in the refrigerator main body and connected to the condenser so as to freeze water in an ice making tray.
In another aspect of the present invention, there is provided a refrigerator including: a housing having inlet and outlet allowing introduction and discharge of a refrigerant; and at least one or more ice core portions protruded from one side of the housing to be sunk in water in an ice making tray.
A refrigerator according to the present invention is further provided with an ice making evaporator in addition to an evaporator for cooling a refrigerating chamber or a freezing chamber and allows the ice making evaporator to be sunk in water for icing, so as to enable a quick generation of transparent ice. Also, an ice maker can be disposed either in the refrigerating chamber or a refrigerating chamber door, thus to prevent the ice from being generated with air bubbles remaining in the water, thereby enhancing ice transparency. In addition, even if the ice maker is disposed in the refrigerating chamber door, cold air does not have to be induced from the freezing chamber, which allows independent operations of the freezing chamber and the ice maker, resulting in an increase in energy efficiency.
Hereinafter, description will be given in detail of a refrigerator according to the present invention with reference to the accompanying drawings.
As shown in
The refrigerating chamber 2 is provided with an ice maker 100 for generating ice, and an ice bin 200 for storing ice generated by the ice maker 100 is installed in the refrigerating chamber door 4. Although not shown in the drawings, the ice maker 100 may be installed above the ice bin 200 in the refrigerating chamber door 4.
The ice maker 100, as shown in
The ice making evaporator 110, as aforementioned, is connected to a refrigerating cycle device for cooling a refrigerator which is configured by the compressor 10, the condenser 20 and the cooling evaporator 30, so as to configure a refrigerating cycle device all together. For example, as shown in
First and second switching valves 55 and 56 are installed at inlet and outlet sides of the ice making evaporator 110, respectively. Accordingly, the first and second switching valves 55 and 56 are open upon the icing so as to allow a refrigerant to be introduced into the ice making evaporator 110 via the main pipe 61, whereas being closed upon an ice separation or a non-operation of icing so as to block the introduction of a refrigerant into the ice making evaporator 110 via the bypass pipe 62. Alternatively, only one of the first and second switching valves 56, especially, the first switching valve 55 may be installed at the inlet side of the ice making evaporator 110.
Here, only one cooling evaporator 30 may be installed as shown in
On the other hand, the cooling evaporator 30, as shown in
Unexplained reference numeral 70 denotes a drier, and 80 denotes an accumulator.
Operation and effect of the refrigerator according to the present invention having such configuration will now be described.
That is, the compressor 10 starts operating to compress a refrigerant. The compressed refrigerant is discharged into the condenser 20 via the main pipe 61. The refrigerant flown through the condenser 20 is introduced into the cooling evaporator 30 via the expanding valve 40. The refrigerant introduced into the cooling evaporator 30 is recollected to the compressor 10 with generating cold air. The cold air generated in the cooling evaporator 30 is supplied each to the refrigerating chamber 2 and the freezing chamber 3, so as to keep foods in the refrigerator in a fresh state.
Here, in case where the cooling evaporator 30 is configured by the refrigerating chamber evaporator 31 and the freezing chamber evaporator 32 which are connected to each other in parallel or in series, a refrigerant may be supplied respectively or sequentially to the refrigerating chamber evaporator 31 and the freezing chamber evaporator 32, so as to independently cool the refrigerating chamber 2 and the freezing chamber 3.
In the meantime, in case where a refrigerating cycle device of the refrigerator carries out an ice making operation, the first and second switching valves 55 and 56 are open. Accordingly, a refrigerant which flew through the condenser 20 via the first switching valve 55 is partially introduced into the ice making evaporator 110 via the main pipe 61. The refrigerant introduced in the ice making evaporator 110 quickly freezes water contained in the ice making tray 120 while flowing through the ice making evaporator 110, so as to fast make ice with high transparency.
Here, the ice making evaporator 110 may be provided with an ice core portion for forming an ice core.
To this end, the ice making evaporator 110, as shown in
A refrigerant guiding plate 113 which partitions each ice core portion 112 in a refrigerant flowing direction is formed in the ice core portion 112 to extend from upper side to lower side of an inner circumferential surface of the housing 111. The refrigerant guiding plate 113 is formed shorter than the length of the ice core portion 112 such that front and rear sides of each ice core portion 112 can be communicated with each other at a lower end of the refrigerant guiding plate 113. Accordingly, a refrigerant can be introduced by the refrigerant guiding plate 113 to evenly circulate the whole ice core portions 112.
The ice core portion 112 may separately be fabricated from the housing 11 of the ice making evaporator 110 to be assembled to an outer surface of the housing 111. In this case, the ice core portion 112 may preferably be implemented as a heat pipe, or a rod made of copper or a material having high thermal conductivity.
The ice making tray 120 may be formed of a material having high thermal conductivity, and then coupled to a container driving unit 130 for shaking the ice making tray 120 at certain speed, which allows air bubble to be out of water during the icing process. For example, the container driving unit 130 may be configured such that the ice making tray 120 is connected to a separate motor which rotates forward and backward and thus the ice making tray 120 slowly bi-directionally rotates within an approximately certain angle for an ice making time period. Alternatively, the container driving unit 130 may be configured such that an ice separating motor for rotating the ice making tray 120 in order to separate ice from the ice making container 120 is used so as to allow the ice making tray 120 to bi-directionally rotate even during the ice making, as aforementioned.
With the ice making evaporator having such configuration, while a refrigerant introduced into the inlet of the housing 111 flows toward the outlet thereof, the refrigerant makes a zigzag movement in a longitudinal direction of each ice core portion 112 by the refrigerant guiding plate 113 disposed inside each ice core portion 112. Accordingly, the refrigerant evenly circulates in each of the ice core portions 112, which allows each ice core portion 112 to be cooled below a freezing point within a short time. A surface temperature of the ice core portion 112 becomes lower than a peripheral temperature, namely, the temperature of the refrigerating chamber 2. Accordingly, the surface of each ice core portion 112 starts to be frozen. Such freezing serves as an ice core so as to freeze water around it. In addition, as the ice making tray 120 is disposed in the refrigerating chamber 2 or the refrigerating chamber door 4, the temperature of the surface of water can be maintained higher than the freezing point, whereby the surface of water having air bubble generated therein is not frozen yet. Hence, the air bubble generated in the water in the ice making tray 120 moves toward the surface of water not frozen yet to be discharged, thereby generating transparent ice without containing air bubble therein.
Such results can be obtained from the case using a heat pipe or a thermal transfer rod as the ice core portion 112. That is, since one end of the heat pipe or thermal transfer rod comes into contact with the cold ice making evaporator 110, the heat pipe or the thermal transfer rod is cooled within a short time. The surface of the heat pipe or the thermal transfer rod is thusly frozen, so as to rapidly freeze such water in the ice making tray 120. In addition, since air bubble generated in the water in the ice making tray 120 is discharged out of the surface of non-frozen water, the ice generated can have high transparency. Also, during the icing of the water in the ice making tray 120, the container driving unit 130 is operated to continuously shake the ice making tray 120, which makes air bubble fast effectively be discharged, thereby further enhancing the transparency of ice.
Next, when the surface of the ice core portion 112 is frozen, the direction of the first refrigerant converting valve 51 is changed such that a refrigerant of the compressor 10 is guided toward the bypass pipe 62 via the second outlet. The high temperature refrigerant guided to the bypass pipe 62 is introduced into the inlet of the ice making evaporator 110. The high temperature refrigerant then circulates inside each ice core portion 112 by the refrigerant guiding plate 113, thereby to increase a surface temperature of the ice core portion 112 within a short time. Accordingly, the surface of the ice core portion 112 and the ice are quickly separated from each other, and thereby ice is dropped in the ice making tray 120. Prior to this process, by removing the water from the ice making tray 120, when the ice dropped in the ice making tray 120 is collected in an ice storing container 200 disposed below the ice making tray 120, it can be prevented that water cannot be poured together with the ice in the ice storing container 200.
To this end, as shown in
In the meantime, other embodiments of the refrigerating cycle device in the refrigerator according to the present invention will now be described.
That is, the aforementioned embodiments are implemented such that the cooling evaporator 30 is connected to the ice making evaporator 110 in parallel; however, these embodiments are implemented such that the cooling evaporator 30 is connected to the ice making evaporator 110 in series.
For example, as shown in
Even in this case, the ice core portions 112 formed as long as being sunk in water in the ice making tray 120 is protruded from the lower surface of the ice making evaporator 110, as shown in
In the refrigerant according to the above embodiment, a refrigerant discharged from the compressor 10 is introduced into the refrigerant evaporator 30 via the condenser 20 to generate cold air. Such cold air is supplied each to the refrigerating chamber 2 and the freezing chamber 3 of the refrigerant main body 1, so as to keep food stored in each chamber in the fresh state. Simultaneously, the refrigerant introduced into the ice making evaporator 110 via the refrigerant evaporator 30 cools the ice core portion 12 of the ice making evaporator 110 in a short time, so as to form ice, whereby an ice making time can drastically be decreased and transparent ice can be creased due to the removal of air bubble. On the other hand, upon separating ice, the first refrigerant converting valve 51 is used to introduce a high temperature refrigerant into the ice making evaporator 110 via the bypass pipe 62 and thereby the ice core portion 112 of the ice making evaporator 110 is heated to allow a fast separation of the created ice, resulting in facilitating the separation of ice. Other components including the ice core portion 112 and an operational effect thereof are the same or similar to the aforementioned embodiments, detailed explanation of which will thusly be omitted.
Also, the cooling evaporator according to this embodiment may be configured by a refrigerating chamber evaporator 31 and a freezing chamber evaporator. In this case, the refrigerating chamber evaporator 31 may be connected to the freezing chamber evaporator 32 in parallel as shown in
Alternatively, the cooling evaporator 30 and the ice making evaporator 110 of the refrigerating cycle device in the refrigerator according to the present invention may be connected to each other in series. In this case, as shown in
The configuration of the refrigerating cycle device according to these embodiments, other configuration including the ice core portion and their operational effects are the same or similar to the aforementioned embodiments, detailed explanation of which will thusly be omitted.
The present invention has been implemented from the perspective of examples applied to a bottom freezer type refrigerator in which a refrigerating chamber is disposed at an upper side and the freezing chamber is disposed. However, the present invention can be applied to a top mount type refrigerator having a refrigerating chamber disposed below the freezing chamber or a side-by-side type refrigerator having refrigerating chamber and freezing chamber disposed side by side. Also, the present invention can be applied to other types of ice makers using a refrigerating cycle device other than the refrigerators.
[Pretext]
Cooling evaporator, ice making evaporator, ice core portion, ice making tray.
Claims
1. A refrigerator comprising:
- a refrigerator main body having at least one chamber and at least one door for opening/closing the at least one chamber;
- a compressor disposed in the refrigerant main body;
- a condenser disposed in the refrigerant main body and connected to the compressor;
- a cooling evaporator disposed in the refrigerant main body and connected to the condenser for supplying cold air into the at least one chamber; and
- an ice making evaporator disposed in the refrigerant main body and connected to the condenser for freezing water contained in an ice making tray.
2. The refrigerator of claim 1, wherein the cooling evaporator is connected to the ice making evaporator in parallel.
3. The refrigerator of claim 2, wherein the cooling evaporator is provided in plurality, and the plurality of cooling evaporators are connected to each other in parallel.
4. The refrigerator of claim 2, wherein the cooling evaporator is provided in plurality, and the plurality of cooling evaporators are connected to each other in series.
5. The refrigerator of claim 4, wherein the plurality of cooling evaporators are connected to each other in parallel.
6. The refrigerator of claim 3, wherein a plurality of expanding valves are disposed between each of the cooling evaporators and the condenser.
7. The refrigerator of claim 2, wherein a valve for restricting the flow of refrigerant is disposed at at least one portion between the condenser and the ice making evaporator or between the ice making evaporator and the compressor.
8. The refrigerator of claim 1, wherein the cooling evaporator is connected to the ice making evaporator in series.
9. The refrigerator of claim 8, wherein the cooling evaporator is provided in plurality, and the plurality of cooling evaporators are connected to each other in series.
10. The refrigerator of claim 9, wherein the plurality of cooling evaporators are connected to each other in parallel.
11. The refrigerator of claim 8, wherein the cooling evaporator is provided in plurality, and the plurality of cooling evaporators are connected to each other in parallel.
12. The refrigerator of claim 11, wherein the ice making evaporator is connected in series to one of the plurality of cooling evaporators.
13. The refrigerator of claim 8, wherein the ice making evaporator is disposed downstream of the cooling evaporator.
14. The refrigerator of claim 8, wherein the ice making evaporator is disposed upstream of the cooling evaporator.
15. The refrigerator of claim 8, wherein a plurality of expanding valves are disposed between each of the cooling evaporators and the condenser.
16. The refrigerator of claim 1, wherein the cooling evaporator and the ice making evaporator are connected to one condenser.
17. The refrigerator of claim 16, wherein the one condenser to which the cooling evaporator and the ice making evaporator are connected is connected to one compressor.
18. The refrigerator of claim 1, wherein a refrigerant converting valve is disposed at a discharge side of the compressor, and a bypass pipe for guiding a high temperature refrigerant upon separating ice is connected between the refrigerant converting valve and an inlet of the ice making evaporator.
19. The refrigerator of claim 1, wherein the ice making evaporator comprises a housing having inlet and outlet allowing introduction and discharge of a refrigerant, and at least one or more ice core portions each protruded from one side of the housing by a certain length as long as being sunk in water of the ice making tray.
20. The refrigerator of claim 19, wherein the housing is formed in a shape of a pipe having inlet and outlet at both sides thereof, and the ice core portions are formed individually along the lengthwise direction of the housing.
21. The refrigerator of claim 20, wherein the housing is curved at least one more times on a plane.
22. The refrigerator of claim 19, wherein the ice core portions are integrally formed at one side surface of the housing.
23. The refrigerator of claim 22, wherein a refrigerant guiding plate extends in a lengthwise direction inside each ice core portion, to divide the ice core portion in an approximately orthogonal direction to the flowing direction of a refrigerant such that the divided parts of each ice core portion are communicated with each other at the lower end thereof.
24. The refrigerator of claim 19, wherein the ice core portion is attached to an outer surface of the housing.
25. The refrigerator of claim 24, wherein the ice core portion is configured as a heat pipe or a rod formed of a material having high thermal conductivity.
26. The refrigerator of claim 19, wherein the ice making tray is coupled to a container driving unit which shakes the ice making tray.
27. The refrigerator of claim 19, wherein the ice making tray is configured to supply water to the same upon icing water while being coupled to a water supply/drain unit for draining water of the same upon separating ice.
28. The refrigerator of claim 27, wherein the water supply/drain unit comprises a water tank, and water supply/drain line and water pump for pumping water of the water tank so as to supply the pumped water to the ice making tray or to drain the pumped water out of the ice making tray.
29. The refrigerator of claim 28, wherein an ice storing container for storing ice created in the ice making tray is further provided at one side of the ice making tray, and a drain pipe for discharging water generated when ice is melted is connected to the ice storing container.
30. The refrigerator of claim 29, wherein the drain pipe is connected to the water tank.
31. The refrigerator of claim 1, wherein the ice making evaporator is disposed in a refrigerating chamber of the refrigerator main body or a refrigerating chamber door.
Type: Application
Filed: Oct 10, 2008
Publication Date: Aug 4, 2011
Applicant: LG Electronics Inc. (Seoul)
Inventors: Kwang-Ha Suh (Seoul), Tae-Hee Lee (Seoul), Hong-Hee Park (Seoul), Joon-Hwan Oh (Seoul)
Application Number: 12/808,377
International Classification: F25C 5/18 (20060101); F25C 1/00 (20060101); F25C 1/24 (20060101);