JP2004347310A - Ice making equipment, freezer refrigerator, ice making method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a domestic refrigerator provided with an ice making device capable of eliminating defective ice, capable of dispensing with a mechanism for treating cloudy ice melting water, and capable of making ice of high transparency by inexpensive constitutive members, and to provide the device and a method reduced in energy for making easily the transparent ice. <P>SOLUTION: This ice making device is mounted with an ice making pan provided with a plurality of ice generating parts, in every ice making block of the single-structured ice making pan partitioned into the plurality of ice making blocks to store water and to make the ice. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
[Field of the Invention]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology for performing ice making to obtain highly transparent ice by separating gas components and ionic components dissolved in water supplied to an ice tray when generating ice in an ice making device. .
[0002]
[Prior art]
Conventionally, in home refrigerators and the like, water supplied from a water supply device is stored in an ice tray to make ice, and after the ice is made, the ice tray is inverted by a driving device to separate ice, and the ice is automatically stored. Ice making equipment is widespread. However, cloudy ice is generally formed.
[0003]
Generally, when a substance forms a crystal, a single component forms a crystal. The same applies to the case where water freezes to ice, so that impurities dissolved in water are discharged to the ice-water interface during the freezing process, and the impurities are supersaturated at the ice-water interface. If the rate of ice growth is higher than the rate at which impurities in the supersaturated aqueous layer diffuse into water, the ice grows while taking in the impurities, and the ice becomes cloudy due to the taken in.
[0004]
The reason that the ice appears cloudy is that light is reflected on the ice to form a portion that looks white, which is caused by a substance dissolved in water, in particular, a gas component (CO) dissolved in the ice. ₂ , O ₂ ) Are trapped in the ice as tiny bubbles. Light entering the ice refracts and reflects off the surface of the bubbles. Even if the volume of the gas component is the same, the probability that the light path is changed becomes higher as more fine bubbles are formed, that is, the light is more likely to be scattered and reflected, so that it appears whitish.
[0005]
However, the ice that is generally observed is polycrystalline ice formed by solidifying a large amount of single crystal ice regardless of the degree of transparency. In many cases, a substance dissolved in supply water remains between crystals. Therefore, the purpose of making transparent ice is not to actually improve the taste of ice but to pursue the taste and beauty of the ice, which is a major problem in refrigerators related to food and many known technologies are known. Have been.
[0006]
For example, there has been proposed an automatic ice making device in which an ice tray has a double structure in which a number of cores are connected (see Patent Literature 1), and the ice tray is attached to an open surface of an insulated tank provided with a heater. Patent Document 2). There is also a technique of storing or draining water containing impurities and partially pumping up water (see Patent Document 3).
[0007]
[Patent Document 1]
Japanese Patent No. 2524811 (FIGS. 6 and 10)
[Patent Document 2]
Japanese Utility Model Laid-Open Publication No. 6-4561 (FIG. 1 etc.)
[Patent Document 3]
Patent registration No. 2784429 (Claim 1 etc.)
[0008]
[Problems to be solved by the invention]
With conventional ice making equipment, if the hole communicating between the part that obtains clear ice and the part that collects cloudy water is small, water may not enter the lower plate due to the surface tension of the water, and the upper plate may form cloudy ice. There is a problem that there is a risk that the ice tray may be damaged due to the pressure caused by the volume expansion of the ice. Further, air bubbles may accumulate at the lower part of the separator when supplying water. The air bubbles rise after the surface ice surface freezes and the degassed surface disappears, thereby forming odd-shaped ice. In addition, at the time of ice removal, the thickness of the solid layer is increased over the entire bottom surface of the dish, so that the twist torque at the time of ice removal is increased, so that not only motor size but also extra energy is required. Further, after the ice is released, it is necessary to continuously energize for about 30 to 60 minutes at a high input of about 10 W to melt the lower ice tray, and affect the ice in the ice storage box provided under the ice tray, other rooms, and power consumption. There is a problem that it is not practical, such as worsening. Further, there is a problem that the structure becomes complicated, requiring a mechanism for returning the water after melting of the ice to the water supply tank and a drainage basket for pulling the ice out of the water and drying it, resulting in a large size and a high manufacturing cost. there were.
[0009]
The present invention has been made in order to solve the above-mentioned problems, and can solve the problem of ice, and does not require a mechanism for treating cloudy ice melt water. It is an object of the present invention to provide an ice making device and an ice making method capable of refining high ice. It is a further object of the present invention to provide an apparatus and a method for producing transparent ice with low energy that can be easily produced. Another object of the present invention is to provide a practical refrigerator that can obtain delicious transparent ice without reducing the space of the food storage portion.
[0010]
[Means for Solving the Problems]
The ice making device according to the present invention includes an ice making tray, in which ice is generated by storing ice water by storing cold water, receiving cold air, and applying mechanical force, and an ice making tray. A first ice generating unit provided in the partitioned ice making block for receiving ice and promoting ice making; and a first ice generating unit provided in the first ice generating unit and provided with water at the opening. Are connected to each other to reduce the effect of receiving cold air from the first ice generating unit and delay the ice making, and the ice generated by the first ice generating unit is continuously made through the opening. And ice generated by the second ice generating unit, and the opening has a size and a shape that allows ice near the opening to be cut by receiving a mechanical force.
[0011]
The ice making device of the present invention is divided into an ice making tray for storing ice water by storing water supply in each of a plurality of partitioned ice making blocks, receiving ice and making ice and twisting the generated ice, and an ice making tray. A first ice generating unit provided in the ice making block for receiving ice and facilitating ice making; a water supply communicating with the first ice generating unit provided in the ice making block and the opening to cool the cold air from the first ice generating unit; A second ice generating unit capable of delaying ice making by reducing the influence of the second ice forming unit, wherein the second ice forming unit has a size and shape in which ice generated from the first ice generating unit is less likely to be separated from the ice tray. And ice generated by the first ice generator cut near the opening due to the twist of the ice making tray.
[0012]
The ice making device of the present invention includes an ice tray that stores ice water in a plurality of partitioned ice making blocks, receives ice and makes ice while receiving cold air, and an ice tray that is capable of releasing ice, and an ice making block partitioned into ice trays. A first ice generating unit provided to facilitate ice making by receiving cold air; and a water supply communicating with the first ice generating unit and an opening provided below the ice making block to supply cool air from the first ice generating unit. A second ice generator that delays ice making by reducing the influence of the second ice generator, and ice generated by the second ice generator connected to the ice generated by the first ice generator through an opening. The first ice generating unit is open to an open surface of an ice tray, and the second ice generating unit is openably expandable to an opening communicating with the first ice generating unit.
[0013]
The ice making method according to the present invention includes a step of blowing cold air from above the ice tray placed in an ice making room to promote ice making in a first ice generating section provided with an upper surface of the ice tray opened, and a first ice generating step. Heating a second ice generation unit provided below the unit and communicating with the first ice generation unit to delay ice making from the first ice generation unit; and generating ice in the first ice generation unit. Stopping the heating depending on the state to make ice, and twisting the ice tray to cut the ice of the second ice generator and the ice generated by the first ice generator. .
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiment 1 FIG.
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
[0015]
FIG. 1 is a front cross-sectional view of a household refrigerator to which an ice making device according to the present invention is applied, illustrating a state in which a front door is removed. 2A is a side sectional view of the ice tray according to the present invention, FIG. 2B is a top view of the ice tray, FIG. 3 is a top view of the ice tray, and FIGS. FIG.
[0016]
The refrigerator-freezer body 1 includes an outer box 2, an inner box 3, and a heat insulating material 4 filled between the outer box 2 and the inner box 3. A plurality of compartments for storing food are provided. A refrigerator room 6 installed at the upper part, a vegetable room 7 installed at the lower part of the ice making room 5, and a switching room 8 in which an end user can arbitrarily set a temperature by an operation panel (not shown) provided at a door of the refrigerator 1 , A freezing room 9 and the like, which are divided by a partition wall 10 filled with a heat insulating material 4 which forms each compartment. Although FIG. 1 illustrates an example in which the ice storage box 21 and the ice tray 11 are housed in the same ice making chamber 5, they may be provided in different chambers. The above-mentioned operation panel (not shown) allows the end user to select the temperature control and operation mode of each room of the refrigerator, or to display the current temperature and operation mode of each room and to inform the end user.
[0017]
The ice tray 11 shown in FIGS. 2 and 3 is installed in the ice chamber 5 and is a molded product made of a resin material such as polypropylene. The ice tray 11 has a plurality of openings each having an open upper surface and a concave inside. As shown by the flow of air in FIGS. 2 (a) and 2 (b), ice is generated from the top by receiving cold air blown out from the wall of the refrigerator by a blower on the open surface, which is the upper surface of the ice tray 11, as shown by the flow of air in FIGS. Then, the cool air whose upper surface has been cooled circulates to the lower portion and is sucked into the refrigerator wall again. As shown in FIG. 3, some of the wall surfaces between adjacent ice making blocks are connected by cutout grooves for facilitating the supply of water to each block provided near the inside of the dish. Further, as shown in FIG. 1, a water supply pipe 13 for flowing water from a water supply tank 12 for storing water to be supplied to the ice tray 11 to the ice tray 11 is provided. Is provided with a heater for preventing freezing, and opens and closes a solenoid valve of a water supply pipe based on an instruction from a control device to supply a fixed amount of water to the ice tray 11. A drive device 15 including a motor for rotating and driving a support shaft 14 of the ice tray 11 of FIG. 2 and a reduction gear is installed on a frame 16. One end of the support shaft 14 communicates with a frame 16 that supports the ice tray 11, and the other end is connected to the driving device 15. When the ice tray 11 is turned over when the ice tray 11 is inverted at the time of ice removal, the ice tray 11 is turned off. A stopper 17 is provided on the frame 16 for limiting the reversal of the rotation and for applying a twist to accelerate deicing. Even if the driving device rotates the support shaft and the ice tray stops at the stopper 17, the twist is added to the ice tray by, for example, turning the support shaft by 45 °. The ice tray will deform on the side.
[0018]
At a position where it is possible to recognize that the water in the ice tray 11 is almost frozen, for example, at the lower part of the ice tray 11, a temperature sensor made of a thermistor shown in FIG. 18 are attached. A groove-shaped projection 20 is formed integrally with an opening 19 provided on the bottom surface of the ice tray 11, communicates with the ice tray 11 at the opening 19, and stores supplied water. The projection 20 is provided for each of the plurality of ice making blocks in the upper section. Furthermore, below the ice making device, there is an ice storage box 21 for receiving and storing ice that has been inverted and released from the ice tray 11. In this way, the ice making tray is made of ice by a plurality of upper ice making blocks, ie, the first ice forming part and the second ice forming part, which is a groove-shaped projection 20 having a significantly smaller internal volume. Has become.
[0019]
Although not shown, the refrigerator-freezer main body 1 includes a compressor for compressing the refrigerant, a capillary tube for restricting the refrigerant, a condenser for radiating heat of the refrigerant in the gas state to the outside of the refrigerator, and condensing the refrigerant in the liquid state. A refrigeration cycle such as a cooler, a cooler, etc. that cools the air in the refrigerator with the cold heat obtained by vaporization, a ventilation duct and blower that passes the cooler to each room, and the amount of cold air supplied to each room And a control device such as a control board for controlling the operation of each device of the refrigerator. These devices supply cold air to change the temperature of each compartment in the refrigerator, maintain it at a predetermined temperature, and control defrosting, ice making, lighting, and the like.
[0020]
Next, an example of the steps of the ice making operation according to the present embodiment will be described with reference to FIGS. First, water is supplied from the water supply tank 12 to a part of the ice tray 11 through the water supply pipe 13, and water is supplied to each ice making block through the cutout groove. Further, at this time, water is also supplied to the projection 20 through the opening 19. The notch groove may be provided at a position in series with the opening 19 so that water easily flows into the protrusion 20. When there are a plurality of openings 19, a plurality of cutout grooves may be provided on the wall surface between the ice making blocks so as to be in series with each of the openings 19.
[0021]
In the drawings and description of the present invention, an example is described in which the protruding portions 20 are provided in a plurality of axially downwardly long groove shapes for each block, but this makes the ice tray easy to twist at the time of ice removal. This is because the torque of the motor is not significantly different from the conventional one, and the size of the entire ice making device is not increased by accommodating the projection 20 within this rotation radius when the ice tray is inverted. If the shape, direction, etc., do not fall within the radius of rotation or greatly exceed this radius of rotation at the position, size, shape, direction, etc. where the ice tray is easy to twist, for example, a groove like a continuous circle Of course, the structure may be such that the block is connected to a plurality of blocks instead of each block, or an opening is provided on the inner side surface of the ice tray. On the other hand, if the internal volume of the second ice generating section is too large, it takes more time to generate transparent ice, and more energy is used. On the other hand, if it is too small, only ice with reduced transparency can be obtained. In order to produce transparent ice within a practical time, for example, 3.5 hours without increasing the energy much, it is desirable that the internal volume of the projection is about 10 to 20% of the internal volume of the ice tray from which ice is separated.
[0022]
The opening 19 has a shape extending in at least one direction in which water flows. The maximum length is the length of an ice making block formed for each ice of the ice tray 11. This allows the water to flow into the protrusions 20 without losing the surface tension of the water. Still another direction needs to be a shorter shape. For example, the width is 5 mm or less, and the optimum width is 2 to 3 mm. Thus, after the ice making is completed, the ice can be broken in the vicinity of the opening 19 by the twist for ice separation applied to the ice tray 11 by the driving device 15 and the stopper 17. In other words, the protrusion 20 has the largest area at the opening 19 which is the entrance thereof, but by making it long and thin, it is convenient for smooth water supply and cutting during ice removal. The simplest shape assumed as such an opening shape is, for example, a rectangle or an ellipse. However, water surely enters the projecting portion 19 at the time of supplying water, and ice breaks near the opening portion 19 at the time of deicing. Any other shape is possible, if possible.
[0023]
In addition, the protrusions 20 may be shaped such that there is no extremely thin portion or avoid a shape in which a lid is placed over a location where water accumulates. , And the shape may be selected, and in that case, the shape may be horizontal, and there is no other limited element. The depth is also a height at which bubbles are unlikely to accumulate. Under such conditions, the protrusion 20 may not have a shape in which the shape and size of the opening 19 are extruded in the vertical direction of the opening 19, but may have a shape that is reduced or enlarged as the distance from the opening 19 increases. Also, the bottom surface of the projection need not necessarily be a flat surface, but may be an arc-shaped or inclined shape such as an inverted triangle so that the water flow smoothly enters the projection 20. In addition, the protrusions 20 are described as independent shapes for ease of manufacture, but may have an arbitrary number of connected shapes so that the water flow can flow more easily. Since the shape of the opening that is easy to cut in the vicinity of the opening has a shape in which the support shaft is twisted at both ends of the shaft, an elongated opening parallel to the axis does not require much force for breaking ice and is desirable. However, the shape of the opening is not limited to the straight rectangle shown in the figure, it may be wavy or square, and it is only necessary that the opening is provided along the axis, and even if the circle is connected and the shape is elongated, the force must be large. The effect on the driving device is small.
[0024]
Although the bottom of the ice tray is also described as a flat surface, the present invention is not limited to this. As shown in FIG. 5, the bottom of the tray is curved, V-shaped, or only the periphery of the protrusion falls. It may have any shape, such as a curved shape. By adopting such a shape, the thickness of the ice appears to be increased, so that an effect that the same volume of ice looks like large ice can be obtained.
[0025]
Next, the supplied water is frozen in the ice making room 5. Generally, freezing starts from the surface exposed to the low temperature part. At this time, ice forms crystals only with water molecules, and substances dissolved in water (mineral components such as Ca and O ₂ , CO ₂ Gas components) are released to the unfrozen portion outside the crystal. At this time, since the freezing speed of about 5 mm / hour or less is sufficiently low, the melted substance diffuses into the unfrozen portion faster than the freezing speed at first, and transparent ice is generated, and thereafter, reaches supersaturation. One or more large gas bubbles that form a large accumulation of gaseous components and suppress the scattering and reflection of light to some extent are formed. Can be generated. Transparent ice is generated in this process for each block of the ice tray.
[0026]
During this freezing, cool air is supplied from the upper surface of the ice tray 11 so that the freezing speed is lower than the diffusion speed, passes through the gap between the side surface of the ice tray 11 and the frame 16, and passes through the space between the ice storage box 21 and the lower surface of the ice tray 11. It flows. At this time, since the upper surface of the ice tray 11 is in contact with air having a lower temperature and a higher wind speed than the lower surface, the freezing mainly proceeds from the upper surface of the ice tray 11 to the lower surface, and most of the substance dissolved in water is frozen. Spreads toward the unfrozen portion, that is, the lower portion of the ice tray 11. As the freezing further proceeds, only the projections 20 become unfrozen, transparent ice is formed on the ice tray 11, and finally the projections 20 become clouded and frozen in a form containing most of the substance dissolved in the water. Is completed.
[0027]
During this process, the volume of ice increases by about 10%. Therefore, if there is no open space in which the increased volume ice can be extended, the ice tray may be damaged by the pressure of volume expansion. In a structure in which a partition is provided in an ice tray, such as an ice tray in a conventional example, pressure is applied to the partition, and the ice tray is damaged therefrom. In the present invention, since the ice expands toward the open space above the ice tray 11 by the volume expansion in both the ice tray 11 and the projection 20, the ice tray 11 and the projection 20 usually have It only takes as much force as an ice tray and no risk of breakage. That is, the relationship between the opening of the opening 19 and the inner volume of the projection is open without a lid that restricts the expansion of the ice, and the area and the direction limit the extension to the open space on the ice. Since there is no device, a highly reliable device can be made.
[0028]
In order to perform such an operation effectively, it is necessary to install the protrusion 20 at a site where freezing is slowest. For example, if the ice making speed is always the same at any position on the ice horizontal plane, the protrusion may be installed at an arbitrary position on the bottom surface. In order to proceed quickly, it is necessary to provide at least one projection 20 inside the bottom of the ice tray 11. The number and arrangement of the projections 20 are not particularly limited. Although the opening 19 and the projection 20 are described as being installed on the bottom surface of the ice tray 11 here, they may be installed on the side surface of the ice tray 11.
[0029]
The protrusion 20 has a volume necessary for accumulating the dissolved substance to such an extent that the transparency of the ice formed on the ice tray 11 is not affected. Although the volume varies depending on the ice making speed, the ice making time is about 60% for about 1 hour, about 10% for about 3 hours, and about 5% for 3.5 hours. Making ice for about 1 to 3 hours is practical for producing clear ice as food for home refrigerators. In other words, if it is generated in a short time, the transparency becomes incomplete, and if it is applied for an excessively long time, that is, if it is applied for a long time such as 2 mm / hour, more transparent ice can be obtained. Insufficient amount of transparent ice is generated. However, since this depends on the amount of water for ice making, it is desirable to generate clear ice within an ice making cycle of at least 3.5 hours.
[0030]
After the ice making is completed, deicing is performed. The timing of ice removal is a state in which the ice removed from the ice tray 11 is completely frozen, and water does not fall from the ice tray 11 or the projection 20 when falling into the ice storage box 21. If this state is possible, an unfrozen portion may remain on the ice tray 11 or the projection 20.
[0031]
The timing for shifting to the ice removing operation is when the temperature of the temperature sensor 18 reaches a certain temperature at which it can be confirmed in advance that ice making has been completed. However, this timing may be after a lapse of a predetermined time calculated from an arbitrary operation in the refrigerator, such as at the start of water supply or at the time of detection of a preset temperature by the temperature sensor 18 after water supply. It may be based on the operation performed. By this timing detection, as described above, the ice breaks near the opening 19 due to the twist for ice separation applied to the ice tray 11 by the driving device 15 and the stopper 17.
[0032]
At this time, the temperature around the projection 20 must be lower than a predetermined temperature. The predetermined temperature is desirably an upper limit value of a temperature range in which a possibility that the peripheral portion of the ice of the projection 20 is melted and the ice of the projection 20 is connected to the ice of the ice tray 11 to avoid the possibility of ice separation. The temperature may be lower than this.
[0033]
In addition, it is necessary that the ice in the ice tray 11 is designed not to break near the opening 19 but to fall quickly after breaking near the opening 19. First, the side surface of the ice tray 11 must have a sufficient inclination angle from the bottom surface upward and outward. Specifically, the inclination angle of at least one of the side surfaces, for example, the surface of the ice tray 11 in the vicinity of the place where the remaining ice is most likely to be left after the ice removing operation by the driving device 15 and the stopper 17 has an inclination angle of at least 10 ° with respect to the vertical direction. It is desirable to take an angle. In addition to increasing the angle of inclination of the side of the ice tray in order to smoothly drop the ice released from the ice tray, the mold was polished enough to minimize the friction between the ice inside the side of the ice tray and the ice tray. It is desirable to mold with a mold. Specifically, if the mold polishing level is processed to the level of the transparent plastic product (# 2000), it is advantageous for ice removal. In addition, when a structure such as the present ice tray is adopted, the deicing torque is almost the same as the torque at the time of deicing ice from the ice tray currently generally used for automatic ice making. When high torque is required, such as an ice tray, it is not necessary to add new parts, and the dimensions do not change, and the manufacturing cost does not increase.
[0034]
Further, as described above, since the area above the ice tray 11 has a larger area, the effect of increasing the cooling rate than below the ice tray is promoted.
[0035]
Further, when such an ice tray is inverted to twist and separate ice, it is necessary to adopt a specification in which the ice generated on the inner surface side of the projection 20 does not fall. First, it is assumed that the side surface of the projection 20 has a required minimum inclination angle (eg, an angle of 10 ° or less) from the bottom toward the outside toward the top. The minimum required inclination angle is a range of an angle at which ice cannot be removed by the ice-releasing operation, but when the member including the ice tray 11 and the opening 19 and the projection 20 is molded, the member can be securely removed from the mold. Indicates that it is within. As a result, the angle of the side surface that is the inner surface of the ice tray is larger than the angle of the side surface on the inner side of the protrusion, in other words, the side angle of the protrusion is smaller than the side angle of the ice tray. This difference in angle may change the angle of the mold, or may change the way of polishing a portion corresponding to the side surface of the mold.
[0036]
Further, the inside of the projection 20 is not polished. As described above, when it is desired to make the side surface to have a large slope so that the supply water can easily flow into the projection 20, it is more preferable that the surface is further roughened so that ice is further retained in the projection 20. Be certain.
[0037]
Further, the height of the projection 20 is an arbitrary height at which ice does not come off at the time of ice removal, and the radius range of the rotation locus defined by the maximum width of the ice tray 11 and the position of the support shaft 14 with the thickness of the member included. It must be within a height that fits within. The height of the projection 20 may be longer than the maximum width of the ice tray 11 and the radius of the rotation trajectory may be set by the height of the projection 20. Since the structure of components other than the ice tray 11 and the openings 19 and the projections 20 in the device 5 must be changed, a more inexpensive manufacturing method can be adopted. As described above, it is desirable to keep the height within the radius range of the rotation locus defined by the maximum width of the ice tray 11 as described above.
[0038]
Further, as described above, the number of the protrusions 20 is not limited. For this reason, it is also possible to install at a position near and far from the support shaft 14, but at this time, the distance from the bottom of the ice tray 11 to the rotation locus is naturally longer near the support shaft 14. Therefore, the projection 20 located closer to the support shaft 14 may be longer than the projection 20 located farther from the support shaft 14. In this way, when ice is gradually made not only from the top surface but also from the side surface of the ice tray 11, water containing a large amount of dissolved substances and easily forming a cloudy portion can be confined in the projection portion 20 and frozen. it can.
[0039]
After the ice releasing operation, water is supplied, and the ice making process of the next cycle is started. At this time, the ice remaining in the protrusion 20 is gradually melted by the supplied water. As the water melts not only from the top of the ice remaining on the protrusions 20 but also from the side surfaces and melts, the water remaining on the protrusions 20 rises when the water flows sufficiently to the bottom of the protrusions. While being melted by the water stored in the ice tray 11. At this time, if the surface of the water stored in the ice tray 11 is not completely frozen, the gas component is released from the water surface, so that the cloudy component does not increase significantly in the next ice making step.
[0040]
In addition, in order to clarify the transparency of the ice stored in the ice storage box 21, the inside of the ice box 21 may be made a color scheme that makes the transparency of ice clear, or a blue LED may be illuminated. An environment such as brightness may be prepared.
[0041]
Furthermore, in order to always supply ice of the same size at the time of starting the operation of the refrigerator or at the first ice making after cleaning the ice tray, that is, when water or ice does not exist in the projection 20 and at other times, In the latter case, the volume of supplied water may be reduced by the volume of the projection 20.
[0042]
In the above description, a method of cooling from above the ice tray 11 has been described. Next, a configuration in which heating means such as a heater is provided near the protrusion will be described. As a result, the substance forming the cloudy portion can be reliably driven into the protrusion, and transparent ice can be generated in the ice tray, and the ice of the protrusion 20 floats in the water stored in the ice tray 11 at the time of water supply after ice removal. Time can be shortened. Hereinafter, description will be given with reference to FIGS. Note that, in the following description, description of the same components as those described above will be omitted.
[0043]
6 (a) is a side sectional view, FIG. 6 (b) is a top view, FIGS. 7 and 8 are cross sectional views of an ice tray according to the present invention, and FIG. FIG. 10 is a diagram investing a heater installed under the ice tray when the ice tray is viewed from above, FIG. 10 is a flowchart of the ice making step according to the present invention, FIG. 11 is a time chart of the ice making step according to the present invention, and FIGS. It is an example of the ice making experiment result concerning this invention.
[0044]
A code heater 22 in which a heating element such as a nichrome wire is coated with silicon rubber or the like is provided below the ice tray 11, and as shown in FIG. It is installed so that it is in close contact. The heater 22 is required to be formed of a cold-resistant member that does not crack even at a low temperature and that has a flexibility that can follow an ice tray twist at the time of ice separation, for example, a silicon material. In addition, in order to install the heater as compact as possible, as shown in FIG. 9, the length of the heater is very short, such as about the outer circumference of the side surface of the ice tray 11, so that the heater does not deteriorate even if the heat generation density is high. is necessary. However, this heater does not deform or break any members of the refrigerator body 1 including the ice tray 11 even when the ice making chamber 5 is not sufficiently cooled and the water is not supplied with water. It has sufficient reliability in terms of safety. The heating body of the heater attached to the ice tray is safe because the heating part such as metal surface is not exposed because people can touch the ice tray and get wet with water. Become.
[0045]
If the heater 22 is brought into close contact with the bottom surface of the ice tray 11, the freezing speed of that portion may be reduced as in the case of the projection 20, and a cloudy portion may be formed. However, if it is unnecessarily separated too much, freezing proceeds from the bottom surface of the ice tray 11, the opening 19 is closed, and ice with a lot of cloudiness may be formed in the ice tray 11. In order to avoid these, it is necessary to adopt a heater installation structure in which less heat is supplied to the bottom of the ice tray 11 than is supplied to the projections 20. For example, as shown in FIGS. 7 and 8, the heater 22 is brought into close contact with the side surface of the protrusion 20 and is slightly separated from the bottom of the ice tray 11 which is the first ice generating portion (for example, about 2 to 5 mm apart). Take a structure).
[0046]
If the heater 22 is to be installed so as to be in contact with the bottom surface of the ice tray 11 in order to more easily assure the installation position of the heater 22 as the heating means, the heating element inside the coating of the heater 22 is deliberately placed on the ice tray. 11 may be formed so as to be deflected to the opposite side to the bottom surface. Further, the thickness of the ice tray 11 may be increased at a position in contact with the heater 22 on the bottom surface of the ice tray 11, and a heat insulating material may be provided between the ice tray 11 and the heater 22.
[0047]
As described above, when two projections 20 are provided, they are installed so as to be sandwiched between them. However, they may be installed on the bottom of the projection 20 in order to keep the distance from the bottom of the ice tray 11 clear (see FIG. a)). Further, the heater 22 may be installed so as to cover the entire protrusion 20 so as to be easily installed (FIG. 8B). In any case, any installation position may be used as long as it is installed so that heat can be efficiently supplied to the position where freezing is most delayed.
[0048]
It is self-evident that the heater 22 also needs to be installed in the rotation trajectory during ice removal. As a method of installing the heater 22, not only a method of sandwiching the plurality of protrusions 20 but also a case where there is only one protrusion 20, a stopper plate provided in parallel with the protrusion 20 is provided. It may be sandwiched between. Further, the protrusion 20 and the heater 22 may be covered with a member having high thermal conductivity such as an aluminum tape, and may be installed so that heat is efficiently transmitted to the entire protrusion 20. Further, a claw stopper structure that can prevent the heater 22 from falling may be provided. Further, the claw stopper structure may be formed integrally with the installation cover of the temperature sensor 18.
[0049]
In the above description, the number of the heaters 22 is one. However, in the case where the cooling amount from the upper surface of the ice tray 11 is largely different for each ice making block portion, for example, there is a large difference in how the cold air is blown. May be provided with a plurality of heaters 22 to provide individual inputs. Further, although the heater 22 is described as being in close contact with the protrusion 20, the heater 22 does not necessarily need to be in close contact with the protrusion 20 and may be located at a distant position as long as the same heat transfer effect as above can be obtained. In addition, the heater can be efficiently heated by covering the periphery of the heater with a heat insulating material so that most of the heat generated by the heating means is transmitted only to the second ice forming portion which is the protrusion 20.
[0050]
The heater 22 installed as described above may be continuously energized. However, as shown in FIGS. 10 and 11, the heater 22 is energized for a certain period of time after water is supplied, and thereafter the power is cut off to reduce the amount of energy used and reduce the ice making speed. Higher transparency can be obtained even if the temperature is raised.
[0051]
The ice making operation including the control operation of the heater 22 will be described according to the control method shown in FIGS. In step 1, the water supply solenoid valve is energized as shown in FIG. 11 to operate the water supply pump for a certain period of time to supply a predetermined amount of water to the ice tray 11. Immediately after the completion of the water supply performed in step 1, power supply to the heater 22 is started in step 2. As a result, the ice remaining in the protrusions in the previous cycle is melted by the supply and heating of water, and impurities and the like spread throughout the ice tray and a part of the ice is released from the open surface. In step 3, the output of the temperature sensor 18 is reduced to a predetermined temperature Ta, for example, a temperature lower than -1 degree, which is set based on a value correlated with the freezing of water in the ice tray 11 obtained by an experiment or the like. A certain amount of power is applied until it reaches. When the temperature reaches the predetermined temperature Ta, the heater is turned off in step S4. At this time, transparent ice is formed on the ice tray 11, but the water of the projections 20 is still in an unfrozen portion. When the heater 22 is turned off and stops heating, the unfrozen portion in the protrusion 20 freezes rapidly. This is because there is no heat supply to the projections 20 and the projections 20 are exposed to cool air that forms the environment of the ice making room 5 of the refrigerator.
[0052]
In step 5, when it is determined that the output of the temperature sensor 18 has reached the predetermined temperature Tb set based on a value correlated with the freezing of the water in the protrusion 20 determined by an experiment or the like, The process moves to a de-icing process starting from step 6. In step 6, the ice releasing drive device 15 rotates forward, and the ice tray 11 is turned over. In step 7, the ice making tray 11 continues to operate in the forward rotation direction until the time tr elapses. At this time, one end of the ice tray 11 is pressed against the stopper 17 and the plate is twisted, and the ice on the ice tray 11 and the projection 20 is separated by the stress applied to the opening 19 due to the twisting. It falls into the ice storage box 21. In step 8, the driving device 15 rotates in the reverse direction, rotates the ice tray 11 toward the original position, continues to operate in the reverse direction until the time tr elapses in step 9, and returns the ice tray 11 to the original position in step 10. , The driving device 15 stops. At the time of the ice removal, the ice in the projection 20 remains as it is. In step 11, it is detected whether or not the ice storage box 21 is full ice, and the process of supplying water, making ice, and releasing ice is a one-cycle ice making process. The process returns to step 1 until the ice is full and repeats the ice making operation cycle. .
[0053]
FIG. 12 shows an example of an experimental result based on the above control. The horizontal axis is ice making time, and the vertical axis is ice transparency. For example, when it is desired to obtain a product having a transparency of 95% or more, the optimum ice making time is about 2.5 to 3.5 hours. The ice making time earlier than this region is when the amount of current supplied to the heater 22 is small or when the timing for turning off the heater 22 is too early. In addition, the case where the electric power of the heater 22 is large or the case where the timing of turning off the heater 22 is too late are late. Furthermore, when the amount of supplied water is changed, with a smaller amount of water, the ice making time for obtaining the same transparency is shortened as indicated by a dashed line, and with a larger amount of water, the same transparency is obtained as indicated by a broken line. Ice making time slows down. If it is desired to quickly fill the ice even if the transparency is slightly lowered, the temperature Ta may be increased or the amount of electricity may be reduced. If a large amount of transparent ice is not required, it is preferable to lower the set temperature Ta or increase the amount of electricity and further increase the amount of water.
[0054]
The capacity of the heater 22 is determined by the cooling capacity. As the cooling capacity increases, the capacity of the heater 22 must be proportionally increased. However, at this time, when the ice storage box 5 is provided with the ice storage box 21, it is necessary to prevent the ice stored in the ice storage box 21 from being melted by the radiation heat from the heater 22. FIG. 13 is a view in which a substance having a certain heat capacity is placed in an ice storage box and a temperature change at the center thereof is observed. There is no significant change in the temperature before and after the heater 22 is turned on, and the temperature does not rise significantly while the heater 22 is turned on. Therefore, it can be understood that it is possible to consider a structure that hardly thermally affects the ice in the ice storage box 21 with the structure of the ice making room 5 of the ordinary household refrigerator.
[0055]
The energization timing of the heater 22 is set to be immediately after the completion of water supply. However, any timing may be used as long as there is a timing at which energization can be started before the water flowing into the protruding portion 20 begins to freeze. It may be when the temperature detected at 18 reaches the predetermined temperature, or when a predetermined time has elapsed from these timings.
[0056]
The same applies to the timing of the power cut-off of the heater 22 for stopping the heating of the protruding portion 20. In addition to the time when the temperature detected by the temperature sensor 18 reaches the predetermined temperature, the water supplied to the ice tray 11 is almost frozen. However, any timing may be used as long as power can be cut off in a state where a large amount of unfrozen portions remain in the protruding portion 20, for example, after a predetermined time has elapsed from the above-described heater 22 energization start timing, or the above-described heater 22 energization start timing For example, when the temperature detected by the temperature sensor 18 reaches a predetermined temperature after a predetermined time has elapsed.
[0057]
Further, the amount of current supplied to the heater 22 during ice making is fixed, but this may be arbitrarily changed. For example, by increasing / decreasing the amount of current supplied to the heater 22 in accordance with an increase / decrease in the amount of cooling due to a compressor on / off of a refrigerator, it is possible to reduce the power consumption during ice making while increasing the ice making speed without affecting the transparency. In addition, by reducing the amount of electricity or turning off the power during defrost when the cold air is not blown onto the ice tray, the power consumption during ice making can be reduced while increasing the ice making speed without affecting the transparency.
[0058]
Next, a method of cleaning the ice tray will be described. A control board (not shown) provided in the refrigerator stores the number of times ice is made. Then, when the preset number of times is reached, the end user is recommended to perform cleaning by, for example, blinking an LED on an operation panel (not shown). The end user operates the cleaning mode by, for example, pressing a cleaning switch provided on a small operation panel (not shown). In this way, a mechanism is provided in which the power supply to the heater 22 is started to melt the ice in the protruding portion 20, and then the ice tray is turned over and drained. As a result, even if the mineral components contained in the supply water remain on the protrusions 20, it can be removed, and thus transparent ice can be obtained forever and cleanly. The drainage mechanism only needs to store the drainage flowing out of the projection 20 at the time of normal rotation of the ice tray, so that the size is not increased by a simple mechanism. Water may be supplied to promote melting. Further, the water supply and drainage operations may be performed a plurality of times to further enhance the cleaning effect.
[0059]
As another cleaning method, when the cleaning mode is operated, the ice tray 11 is supplied with water and ice is made, and after the ice making is completed, the heater 22 is energized for a time capable of melting only the ice around the projections 20, and then the ice tray is made. May be inverted to discharge the ice formed on the ice tray 11 and the projections 20 in a connected state, thereby removing the mineral components remaining on the projections 20.
[0060]
Further, the refrigerator body 1 is provided with a switch that allows the end user to select between normal ice making and transparent ice making. When the normal ice making is selected, the operation of the heater 22 is stopped, and the operation for making ice for a preset time is performed. Since the switching can be performed, the power consumption can be saved by the end user's intention.
[0061]
The refrigerator according to the present invention includes a single-structure ice tray that is divided into a plurality of ice-making blocks and stores water to make ice. This is an ice making device capable of providing transparent ice to an end user by separating parts. This makes it possible to obtain transparent ice with almost the same structure and dimensions as those of an ice making device provided in a conventional refrigerator and with little increase in energy. A first ice generating unit provided with a hole in a part of an ice tray for storing and ice making water and a second ice generating unit having an opening having the same shape as the hole provided in the first ice generating unit are integrally formed. Manufacturing of such a single-layered ice tray is simple in that the melted resin is injected into the cavity between the two molds and molded to form an integrated ice tray and projection. Can be manufactured in a short time with a manufacturing device. In addition, the inner surface of the dish of the first ice forming part of the ice tray is equivalent to the inside of the mold corresponding to the upper ice tray so that the inner surface of the dish of the second ice generating part is smoother than the inner surface of the dish. What is necessary is just to make the surface of the wall surface to be slippery, and to leave the wall surface corresponding to the inside of the lower projection portion without polishing.
[0062]
The inner side surface of the ice tray and the inner side surface of the protrusion of the present invention are inclined outward from the lower surface side toward the upper surface side, and further inclined from the lower surface side to the upper surface side of the side surface of the plate of the first ice generating unit which is an ice tray. When the angle is set to be larger than the inclination angle from the lower surface side to the upper surface side of the side surface of the dish of the second ice generating unit, which is a projection, with respect to the vertical direction, the ice is easily separated from the ice tray, and the projection is formed. The ice does not release easily. In this case, in the first ice generating section, the side of the ice tray may be inclined outward at a large angle from the lower surface side to the upper surface side to make it easier to separate ice, but since the twist is given, it is determined by the twist angle. There is an angle so long as the ice block is easy to come out of the upper ice tray and hard to come out of the lower projection.
[0063]
It is preferable that at least the cooling unit cools the surface facing the heating unit with respect to the heating unit that is close to the second ice forming unit that is the protrusion of the present invention. It is desirable that this heating means be more distant than the first ice generating unit.
[0064]
Next, a description will be given of a method for producing large-sized transparent ice having good appearance (good design) required when drinking whiskey by rocking or water splitting (transparent ice larger than normal ice by normal ice making). . In the present embodiment, an object is to obtain ice of a size satisfying the user by making the amount of water supplied to the ice tray 11 variable. FIG. 14 is a diagram illustrating a flow of an ice making process of the refrigerator according to the first embodiment of the present invention, and FIG. 15 is a diagram illustrating a time chart of the ice making process in a case where a water supply amount is varied.
[0065]
The ice making operation including the control operations of the heater 22 and the water supply pump 23 will be described with reference to the drawings. In the present embodiment, for example, an ice-making mode switching button for selecting transparent ice is provided on an operation panel provided on the front or side surface of the refrigerator main body (not shown) or the inner wall of the refrigerator, and the user switches the ice-making mode switching button to transparent ice. In the case where the transparent ice selecting button is provided instead of the switching or the switching button, it is determined in step 31 whether the transparent ice making mode is selected, such as whether the transparent ice button is pressed, and the water supply amount is adjusted. I do.
[0066]
When the transparent ice making mode is selected in step 31, a control device (not shown) receives a transparent ice manufacturing command in step 31 in step 32, and a water supply pump driving time t1 preset in the control device. Only the water supply pump 23 is driven to supply water to the ice tray 11. If the transparent ice making mode is not selected, the water feed pump 23 is driven by the water feed pump drive time t2 previously set in the control device (not shown) to supply water to the ice tray 11 in step 33. At this time, the driving time t1 of the pump is longer than the driving time t2, and may be set to about t1 / t2 = 1.1 to 3, for example, t1 = 10 seconds, t2 = 7 seconds. That is, the ice making mode is determined in step 31, and the amount of water supplied to the ice tray 11 is changed in steps 32 and 33 to change the size of the ice.
[0067]
If water is supplied to the ice tray 11 in step 33, the process directly proceeds to step 37. At this time, the ice remaining in the protrusion 20 of the ice tray 11 in the previous cycle is melted by the supply and heating of water, and impurities and bubbles are spread over the entire ice tray and a part is released from the open surface. . When water is supplied to the ice tray 11 at the drive time t1 in step 32, the heater 22 is energized in step 34 immediately after the water supply is completed. At this time, the ice left on the projection 20 of the ice tray in the previous cycle is melted by the current supply of water and heating by the heater 22, and impurities and air bubbles spread throughout the ice tray and a part of the ice tray 11 is removed. Released from open surfaces.
[0068]
In step 35, the output of the temperature sensor 18 is set to a predetermined temperature Ta (for example, a temperature lower than -1 degree) set based on a value correlated with the freezing of water in the ice tray 11 obtained by an experiment or the like. Until a certain amount of current is passed. When the temperature reaches the predetermined temperature Ta, the power supply to the heater 22 is cut off at step 36. At this time, although the transparent ice is formed in the first ice generating part in the ice tray 11, the water of the projection part 20 is in a state where an unfrozen part still remains. When the heater 22 is turned off and the heating is stopped, the inside of the second ice generating unit in the projection 20 freezes rapidly. This is because the cold air of -18 degrees which forms the freezer compartment of the refrigerator is supplied.
[0069]
In step 37, when it is determined that the output of the temperature sensor 18 has reached the predetermined temperature Tb set based on a value correlated with the freezing of the water in the protrusion 20 determined by an experiment or the like, The process moves to the ice removing step starting from step 38. In this case, the set value Tb in step 37 is the same value (for example, -6 degrees) regardless of the ice making mode, for example, -10 degrees when the transparent ice making mode is selected, and -6 degrees when the normal ice making mode is selected. Alternatively, the set value Tb may be changed depending on the ice making mode. In step 38, the ice-releasing driving device 15 rotates forward, and the ice tray 11 is turned over. In step 39, the ice making tray 11 continues to operate in the forward rotation direction until the time tr elapses.
[0070]
At this time, one end of the ice tray 11 is pressed against the stopper 17 and the plate is twisted, and the ice on the ice tray 11 and the projection 20 is separated by the stress applied to the opening 19 due to the twisting. It falls into the ice storage box 21. In step 40, the driving device 15 rotates in the reverse direction, rotates the ice tray 11 toward the original position, continues to operate in the reverse direction until the time tr elapses in step 41, and returns to the original position in step 42. , The driving device 15 stops. At the time of the ice removal, the ice in the projection 20 remains as it is. In step 43, it is detected whether or not the ice storage box 21 is full ice, and the process of supplying water, making ice, and releasing ice is a one-cycle ice making process. The process returns to step 31 until the ice is full and repeats the ice making operation cycle. .
[0071]
In addition, when the transparent ice is generated, increasing the water supply amount in this way can generate large ice in the transparent ice generating means and leads to improvement in the design of the ice. The present invention is also effective in systems other than the transparent ice making method using an ice tray provided with the second ice forming unit and the ice forming unit.
[0072]
As described above, the present invention can avoid the formation of irregular ice without significantly changing the components of an ice making room of a normal refrigerator in which an automatic ice making device is installed, and can also use an easy manufacturing method. It is possible to provide an ice making device that can manufacture an ice tray at low cost, does not adversely affect ice in the ice storage box, and has excellent cleaning properties. As a result, a practical refrigerator can be obtained. In addition, it has a water supply amount variable means for changing the water supply time to the ice tray (pump drive time), so that the design time can be increased by increasing the water supply time to the ice tray by making the water supply time longer than usual. You can make large transparent ice with excellent quality.
[0073]
In addition, ice water is stored in each of a plurality of partitioned ice making blocks, ice is made by receiving cold air, ice is generated by applying mechanical force, and ice generated by the ice can be released from the ice making block 11; And a control device that is a water supply amount adjusting means for varying the amount of water supply. When the production instruction for the transparent ice is received, the amount of water supply to the ice tray 11 is increased. The amount of water supplied to the water is increased, and large transparent ice suitable for drinking whiskey with water or water is obtained, and delicious transparent ice with good design is obtained.
[0074]
【The invention's effect】
According to the present invention, as described above, an apparatus and a method with low energy that can easily produce transparent ice can be obtained. Furthermore, the present invention can provide a practical refrigerator that can obtain delicious transparent ice without reducing the space of the food storage portion.
[Brief description of the drawings]
FIG. 1 is a front sectional view of a household refrigerator-freezer to which an ice making device according to Embodiment 1 of the present invention is applied.
FIG. 2 is an explanatory diagram of an ice tray according to Embodiment 1 of the present invention.
FIG. 3 is a top view of the ice making device according to Embodiment 1 of the present invention.
FIG. 4 is a cross-sectional view of the ice making device according to the first embodiment of the present invention.
FIG. 5 is a cross-sectional view of another ice making device according to Embodiment 1 of the present invention.
FIG. 6 is a side sectional view of another ice making device according to Embodiment 1 of the present invention.
FIG. 7 is a cross-sectional view of another ice making device according to Embodiment 1 of the present invention.
FIG. 8 is a cross-sectional view of another ice making device according to Embodiment 1 of the present invention.
FIG. 9 is a bottom view of the ice making device according to Embodiment 1 of the present invention.
FIG. 10 is a diagram illustrating a flow of an ice making process according to the first embodiment of the present invention.
FIG. 11 is a diagram illustrating a time chart of an ice making process according to the first embodiment of the present invention.
FIG. 12 is a diagram illustrating an example of an ice making experiment result according to the first embodiment of the present invention.
FIG. 13 is a diagram illustrating an example of an ice making experiment result according to the first embodiment of the present invention.
FIG. 14 is a diagram illustrating a flow of an ice making process according to the first embodiment of the present invention.
FIG. 15 is a diagram illustrating a time chart of an ice making process according to the first embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Refrigerator main body, 5 Ice making room, 11 Ice making tray, 12 Water supply tank, 13 Water supply piping, 15 Drive, 16 Frame, 17 Stopper, 18 Temperature sensor, 19 Opening, 20 Projection, 21 Ice storage box, 22 Heater, 23 Water pump

Claims (24)

Ice trays that store ice water by storing cold water, receiving cold air, and applying mechanical force to separate ice blocks that can separate ice, and ice blocks that are partitioned into the ice trays. A first ice generating unit provided to facilitate ice making by receiving cool air; and a water supply communicating with the first ice generating unit and an opening provided integrally with the first ice generating unit. A second ice generating unit that delays ice making by reducing the effect of receiving cold air from the first ice generating unit; and the ice that is continuously generated through the opening through the ice generated by the first ice generating unit. Ice produced by a second ice producing unit, wherein the opening has a size and a shape such that ice near the opening can be cut by receiving the mechanical force. An ice tray for storing the water supply in each of the partitioned ice making blocks and receiving the cool air to perform ice making and twisting the generated ice to release ice, and a cold air provided in the ice making block partitioned into the ice making tray. A first ice generating unit for promoting ice making in response to the water supply, and the water supply communicates with the first ice generating unit provided in the ice making block and the opening to receive cool air from the first ice generating unit. A second ice generating unit capable of delaying ice making with a reduced influence, wherein the second ice forming unit has a size and shape in which ice generated from the first ice generating unit is less likely to be separated from the ice tray. An ice making device, wherein the ice tray is twisted and ice generated in the first ice generating unit cut near the opening is separated from the ice tray. A plurality of ice-making blocks are provided, each of which stores water supply and receives cold air to perform ice-making, and the generated ice can be separated from the ice-making tray, and the ice-making blocks partitioned into the ice-making trays receive cold air. A first ice generating unit for promoting ice making, and an effect that the water supply communicates with the first ice generating unit and an opening provided below the ice making block and receives cold air from the first ice generating unit; A second ice generating unit that delays ice making by reducing the amount of ice generated by the second ice generating unit that continuously makes ice through the opening to the ice generated by the first ice generating unit Ice, the first ice generator is open to an open surface of the ice tray, and the second ice generator is openably expanded to an opening communicating with the first ice generator. An ice making device, comprising: An ice tray for storing the water supply in each of the partitioned ice making blocks and receiving the cool air to perform ice making and twisting the generated ice to release ice, and a cold air provided in the ice making block partitioned into the ice making tray. A first ice generating unit for promoting ice making in response to the first ice generating unit; and a water supply communicating with the first ice generating unit and an opening provided below the ice making block. A second ice generating unit capable of delaying the ice making by reducing the influence of the second ice forming unit, wherein the second ice forming unit has a size and a shape in which ice generated by the first ice generating unit is less likely to be separated from the ice tray. An ice forming unit, wherein the first ice forming unit has an inclination angle from the lower surface side to the upper surface side of the side surface of the dish toward the upper surface side from the lower surface side of the side surface of the dish of the second ice generating unit. The angle must be greater than the angle of inclination relative to the vertical. Ice making apparatus according to claim. A plurality of ice-making blocks are provided, each of which stores water supply and receives cold air to perform ice-making, and the generated ice can be separated from the ice-making tray, and the ice-making blocks partitioned into the ice-making trays receive cold air. A first ice generating unit in which ice making is promoted; and an opening provided below the ice making block, the first ice generating unit communicates with the water supply, and receives cool air from the first ice generating unit. A second ice generating unit that delays ice making by reducing the influence thereof, wherein the second ice generating unit has a shape protruding downward from the first ice generating unit formed in the ice making block. An ice making device, characterized in that: An ice tray for storing the water supply in each of the partitioned ice making blocks and receiving the cool air to perform ice making and twisting the generated ice to release ice, and a cold air provided in the ice making block partitioned into the ice making tray. A first ice generating unit for promoting ice making in response to the water supply, and the water supply communicates with the first ice generating unit provided in the ice making block and the opening to receive cool air from the first ice generating unit. A second ice generator that can delay ice making with less effect, wherein the volume of the second ice generator is 10-20% of the volume of the first ice generator. And ice making equipment. An ice tray for storing ice water and storing ice water by receiving cold air and applying mechanical force to separate ice blocks, and ice blocks partitioned into the ice trays. A first ice generating unit for promoting ice making by receiving cold air, and the water supply communicating with the first ice generating unit and the opening provided in the ice making block to supply cool air from the first ice generating unit. A second ice generating unit capable of delaying ice making by reducing the influence of the first ice generating unit on the first ice generating unit so that the ice generated by the first ice generating unit is easily separated from the ice. An ice making device, wherein an inner surface is smoother than an inner surface of the second ice generator. The second ice generating unit has an elongated groove shape having an opening with a width of 5 mm or less provided on one surface of the first ice generating unit so as to be easily cut from ice generated in the first ice generating unit. The ice making device according to any one of claims 1 to 7, wherein A plurality of ice-making blocks are provided, each of which stores water supply and receives cold air to perform ice-making, and the generated ice can be separated from the ice-making tray, and the ice-making blocks partitioned into the ice-making trays receive cold air. A first ice generating unit for promoting ice making, and the water supply communicating with the first ice generating unit and the opening provided in the ice making block so that the ice making is delayed from the first ice generating unit; And a second ice generating unit heated by the means, wherein the heating means stops heating according to the temperature of the first ice generating unit. A plurality of ice-making blocks are provided, each of which stores water supply and receives cold air to perform ice-making, and the generated ice can be separated from the ice-making tray, and the ice-making blocks partitioned into the ice-making trays receive cold air. A first ice generating unit for promoting ice making, and the water supply communicating with the first ice generating unit and the opening provided in the ice making block so that the ice making is delayed from the first ice generating unit; A second ice generator that is heated by the means, wherein the second ice generator has a shape protruding downward from the first ice generator formed above the ice tray, The ice making device, wherein the heating means is provided on at least one surface of the second ice generating unit. The ice making device according to claim 9, wherein the heating unit is configured to double-insulate a heater main body. The ice making device according to any one of claims 9 to 11, wherein a heater main body of the heating unit is provided at a position separated from the first ice generating unit by a predetermined distance or more. The ice making device according to any one of claims 1 to 12, wherein the second ice generating unit has an opening having an area equal to or larger than that of the inside so that ice inside can be expanded. apparatus. The volume of the second ice generating unit is smaller than the volume of the first ice generating unit, and is provided with a dimension within a rotation radius of the ice tray. An ice making device according to any of the claims. 15. The ice making device according to claim 1, wherein the ice tray is formed by pouring molten resin into a cavity between two molds. 16. The ice making device according to claim 15, wherein a surface of the mold forming an inner surface of the first ice generating portion of the ice tray is polished to a level of a plastic product. . 17. A water supply amount adjusting means for varying a water supply amount to the ice tray, wherein the water supply amount to the ice tray is increased when a production instruction of transparent ice is received. The ice making device according to any one of the above. A refrigerator according to any one of claims 1 to 17, wherein the ice tray is placed in an ice-making chamber, and ice is produced by blowing cooled cold air from above the ice tray. A step of blowing cold air from above the ice tray placed in the ice making chamber to promote ice making in the first ice generating section provided with the upper surface of the ice tray opened, and provided below the first ice generating section. Heating the second ice generating unit communicating with the first ice generating unit to delay the ice making more than the first ice generating unit; and heating the ice according to the state of ice generation in the first ice generating unit. Stopping the ice making and ice making; and twisting the ice making tray to cut the ice of the second ice generating part and the ice generated by the first ice generating part. And ice making method. After the ice has been separated from the first ice generating unit of the ice tray, water is supplied to the ice tray, the second ice generating unit is heated, and ice is formed in the first and second ice generating units. 20. The ice making method according to claim 19, further comprising the step of: performing a cycle of the ice making and de-icing in one cycle according to a heating state in the second ice generating unit. 21. The ice making method according to claim 19, wherein one cycle of ice making and ice separation performed in the ice tray is performed within 3.5 hours. 22. The ice making method according to claim 19, further comprising a water supply amount adjusting step of changing a water supply amount from the water supply tank to the ice making tray by changing a driving time of a water supply pump. 23. The ice making device according to claim 22, wherein, in the water supply amount adjusting step, when a production instruction for transparent ice is received, the driving time is extended to increase the water supply amount to the ice tray. Water is stored in each of the plurality of partitioned ice making blocks, ice is made by receiving cold air, and ice is generated by applying mechanical force. An ice-making device, comprising: a water-supply-amount adjusting means, wherein the water-supply amount to the ice-making tray is increased when a production instruction for transparent ice is received.

Images