JP2006275510A - Ice making device, freezing refrigerator, and ice making method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a house refrigerator with an ice making device having inexpensive structural members for refining highly transparent ice while avoiding incomplete formation of ice and eliminating the need for a mechanism which treats clouded ice melted water, and to provide a device and method for easily manufacturing transparent ice with less energy. <P>SOLUTION: The ice making device is mounted with a single-structure ice making tray 11 partitioned into a plurality of ice making blocks for storing water and making ice. The ice making tray 11 has a plurality of ice forming parts in the ice making blocks, respectively. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a technique for making ice to obtain highly transparent ice by separating gas components and ion components dissolved in water supplied to an ice tray when generating ice in an ice making device. .

  Conventionally, in a refrigerator-freezer for home use, the water supplied from the water supply device is stored in an ice tray to make ice, and after ice making, the ice tray is inverted by the drive device to separate the ice, and the ice is stored. Ice making equipment is widespread. However, generally cloudy ice is formed.

  In general, when a substance forms crystals, crystals are formed with a single component. The same applies to the case where water freezes to become 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. When the growth rate of ice is larger than the diffusion rate of impurities in the supersaturated water layer into the water, the ice grows while taking in the impurities, and the ice becomes clouded by the taken-in one.

Ice appears to be cloudy because light is reflected on the ice to form parts that appear white. This is due to substances dissolved in water, especially gas components dissolved in ice (CO ₂ , This is because O ₂ etc.) are trapped in ice as fine bubbles. Light that enters the ice is refracted and reflected on the surface of the bubble. Even if the volume of the gas component is the same, the probability that the path of the light is changed is increased as more fine bubbles are formed, that is, the light is more easily scattered and reflected, so that it looks whitish.

  However, the ice generally seen is polycrystalline ice that is formed by solidifying a large amount of single crystal ice regardless of transparency, and there are many cases in which a substance dissolved in the supply water remains between the crystals. Therefore, the purpose of making transparent ice is not to improve the actual taste of ice, but to pursue the deliciousness and beauty of its appearance. This is a major problem in refrigerators related to food, and many known technologies are known. It has been.

  For example, an ice making apparatus having a double structure in which an ice tray is connected with a large number of cores (see Patent Document 1) and an automatic ice making apparatus in which this ice tray is attached to an open surface of a heat insulating tank provided with a heater have been proposed ( Patent Document 2). Further, there is a technique for storing water containing impurities, draining and draining water, and pumping a part of the water (see Patent Document 3).

Japanese Patent No. 2524811 (FIGS. 6, 10, etc.) Japanese Utility Model Publication No. 6-4561 (FIG. 1 etc.) Patent registration No. 2781429 (claim 1 etc.)

In 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 dish due to the surface tension of water, and there is a possibility that cloudy ice can form on the upper dish There was a problem that there was a risk that the ice tray was damaged by the pressure due to the volume expansion of ice. Furthermore, air bubbles may accumulate at the bottom of the separator during water supply. This bubble rises after the surface of the upper ice plate freezes and the deaeration surface disappears, and deformed ice is formed. In addition, when the ice is removed, the thickness of the solid layer is increased over the entire bottom surface of the plate, which increases the twisting torque at the time of the ice removal and requires extra energy as well as the motor size. Furthermore, to melt the lower tray ice after deicing, continuous energization is required for 30 to 60 minutes with a high input of about 10 W, the effect on the ice in the ice storage box provided under the ice tray and other rooms, power consumption There was a problem that it was not practical, such as worsening. Furthermore, there is a problem that the structure is complicated, the size is large, and the manufacturing cost is high, such as a mechanism for returning the water after melting the ice to the water supply tank and a drainer for pulling the ice from the water and drying it. there were.

  The present invention has been made to solve the above-described problems, and can solve the problem of ice, and does not require a mechanism for treating cloudy ice-melted water. An object is to provide an ice making apparatus and an ice making method capable of purifying high ice. It is a further object of the present invention to provide a low energy device and method that can easily produce transparent ice. A further object of the present invention is to provide a practical refrigerator in which delicious transparent ice can be obtained without reducing the space in the food storage part.

  The ice making device of the present invention stores water in each of a plurality of partitioned ice making blocks, receives ice to make ice, and makes ice generated by applying mechanical force to the ice making tray, and the ice making tray. The first ice generator and the first ice generator that are provided in the partitioned ice making block and receive ice to promote ice making, and are supplied with water through the first ice generator and the opening. Is made continuously through the opening to the second ice generating unit that delays ice making by reducing the influence of the cold from the first ice generating unit, and the ice generated by the first ice generating unit And the ice produced in the second ice producing part, and the opening has a size and shape that allows the ice near the opening to be cut by receiving mechanical force.

  The ice making device of the present invention is divided into an ice making tray in which water is stored in each of a plurality of divided ice making blocks and ice is received by receiving cold air and the generated ice is deiced, and the ice making tray is partitioned. A first ice generating unit provided in the ice making block that receives cold air to promote ice making, and a water supply communicates between the first ice generating unit and the opening provided in the ice making block from the first ice generating unit. Second ice generating unit that can delay ice making by reducing the effect of receiving ice, and has a size and shape that makes it difficult for the ice generated from the first ice generating unit to be separated from the ice tray. And the ice produced in the first ice production part cut in the vicinity of the opening when the ice tray is twisted is deiced.

  The ice making device according to the present invention includes an ice making tray in which water is stored in each of a plurality of partitioned ice making blocks and ice is received by receiving cold air, and the generated ice can be deiced, and the ice making blocks partitioned in the ice making tray A first ice generation unit that is provided with cold air to promote ice making, and a water supply communicates between the first ice generation unit and the opening provided below the ice making block, and cool air is supplied from the first ice generation unit. A second ice generator that delays ice making with less influence, and an ice generated in the second ice generator connected through an opening to the ice generated in the first ice generator; The first ice generating unit is opened to the open surface of the ice tray, and the second ice generating unit is opened to be able to expand to an opening communicating with the first ice generating unit.

  The ice making method of the present invention includes a step of accelerating ice making in a first ice generating unit provided in an ice making chamber by blowing cool air from above the ice making plate to open the top surface of the ice making plate, and first ice generation A step of heating a second ice generating unit provided below the unit and communicating with the first ice generating unit to delay ice making relative to the first ice generating unit, and generation of ice in the first ice generating unit A step of stopping the heating according to the state and making ice, and a step of twisting the ice tray to cut the ice of the second ice generating unit and the ice generated by the first ice generating unit. .

  As described above, the present invention can provide an apparatus and method with less energy that can easily produce transparent ice. Furthermore, the present invention can provide a practical refrigerator in which delicious transparent ice can be obtained without reducing the space in the food storage portion.

Embodiment 1 FIG.
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a front sectional view of a domestic refrigerator-freezer to which an ice making device according to the present invention is applied, and illustrates a state where a front door is removed. 2A is a side sectional view of the ice making tray according to the present invention, FIG. 2B is a top view of the ice making device, FIG. 3 is a top view of the ice making device, and FIGS. 4 and 5 are cross-sectional views of the ice making tray according to the present invention. FIG.

  The refrigerator-freezer main body 1 is composed of 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, and is provided with a plurality of compartments for storing food. A refrigerating room 6 installed in the upper part, a vegetable room 7 installed in the lower part of the ice making room 5, and a switching room 8 in which the end user can arbitrarily set the temperature by an operation panel (not shown) provided on the door of the refrigerator 1 And a freezer compartment 9 and the like, which are divided by a partition wall 10 filled with a heat insulating material 4 for partitioning each chamber. Although FIG. 1 illustrates an example in which the ice storage box 21 and the ice tray 11 are stored in the same ice making chamber 5, they may be provided in different chambers. Further, the above-described operation panel (not shown) can be used by the end user to select the temperature adjustment and operation mode of each room of the refrigerator, or can display the current temperature and operation mode of each room to inform the end user.

  The ice tray 11 described in FIG. 2 and FIG. 3 is a molded product made of a resin material such as polypropylene, which is installed in the ice making chamber 5. The top surface is opened, and a plurality of recesses are formed on the inside. As shown by the air flow in FIGS. 2 (a) and 2 (b), ice is generated from above by receiving cold air blown from the refrigerator wall surface by the blower on the open surface, which is the upper surface of the ice tray 11, as shown in the air flow in FIGS. The cold air whose upper surface has been cooled circulates in the lower part and is sucked into the refrigerator wall surface again. Some of the wall surfaces between adjacent ice making blocks as shown in FIG. 3 are connected by notch grooves for facilitating pouring of water into each block provided closer to the inside of the dish. Further, as shown in FIG. 1, a water supply pipe 13 for flowing water from the water supply tank 12 for storing water supplied to the ice tray 11 to the ice tray 11 is provided. Although not shown, an outlet of the water supply pipe 13 is provided. Is provided with a heater for preventing freezing, and a certain amount of water is supplied to the ice tray 11 by opening and closing the electromagnetic valve of the water supply pipe based on an instruction from the control device. A driving device 15 including a motor for rotating and driving the support shaft 14 of the ice tray 11 shown in FIG. 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 inverted when this drive is performed at the time of ice removal, the ice tray 11 is reversed. The frame 16 is also provided with a stopper 17 that restricts reversal of the rotation and accelerates deicing by twisting. Even if the driving device rotates the support shaft and the ice tray stops at the stopper 17, the twist is applied to the ice tray by rotating the support shaft, for example, 45 °, and the twist is applied to the ice tray. The ice tray will deform on the side.

  A temperature sensor comprising a heat-insulating material provided at a position where the water in the ice tray 11 can be recognized substantially frozen, for example, the thermistor shown in FIG. 18 is attached. A groove-like protrusion 20 is formed protruding downward and formed integrally with an opening 19 provided on the bottom surface of the ice tray 11 and communicated with the ice tray 11 and the opening 19 to store the supplied water. The protrusion 20 is provided for each of the plurality of upper ice making blocks. Further, below the ice making device, there is an ice storage box 21 for receiving and storing ice that has been inverted from the ice making tray 11 and deiced. In this way, the ice trays make ice from the first ice generating unit that is a plurality of ice making blocks at the top and the second ice generating unit that is the groove-shaped protrusion 20 that has a significantly smaller internal volume. It has become.

  Although not shown, the refrigerator-freezer body 1 includes a compressor that compresses the refrigerant, a capillary tube that squeezes the refrigerant, a condenser that radiates and condenses the heat of the gaseous refrigerant to the outside, and a liquid refrigerant. Adjusting the refrigeration cycle of the cooler, cooler, etc. that cools the air in the cabinet with the cool heat that can be vaporized, the ventilation duct and blower that carries the cool air to each room through this cooler, and the amount of cool air supplied to each room There are cool air circulation devices such as dampers and control devices such as control boards for controlling the operation of each device of the refrigerator. Cold air is supplied by these devices to change the temperature of each individual room in the refrigerator, to keep it at a predetermined temperature, and to control defrosting, ice making, lighting, and the like.

  Next, an example of the steps of the ice making operation according to the present embodiment will be described based on FIGS. First, water is supplied from the water supply tank 12 through the water supply pipe 13 to a part of the ice tray 11 and is supplied to each ice making block through the notch groove. Further, at this time, water is also supplied to the protrusion 20 through the opening 19. The notch groove may be provided at a position in series with the opening 19 so that water can easily flow into the protrusion 20. In addition, when there are a plurality of openings 19, a plurality of notch grooves may be provided on one wall surface between the ice making blocks so as to be in series with each of the openings 19.

  In the drawings and description of the present invention, an example is described in which the protrusion 20 is provided in the shape of a groove that is long in a plurality of axial directions below each block, but this makes it easier to twist the ice tray when deicing. This is because the torque of the motor is not much different from the conventional one, and the size of the entire ice making device is not increased by accommodating the protruding portion 20 within this turning radius when the ice tray is reversed. If the shape, direction, etc. are within the rotation radius at a position, size, shape, direction, etc. that are easy to twist the ice tray, or if it does not greatly exceed this rotation radius, for example, a groove like a continuous circle, Of course, the structure may be such as connecting to a plurality of blocks instead of each block, or providing an opening on the inner side surface of the ice tray. Further, if the internal volume of the second ice generating part is excessively increased, it takes time to generate transparent ice, and the energy used is increased. On the other hand, if it is too small, only ice with reduced transparency can be obtained. If the transparent ice is to be generated without increasing the energy within a practical time, for example, 3.5 hours, the internal volume of the protrusion is preferably about 10-20% of the internal volume of the ice tray.

  The opening 19 has a shape extending in at least one direction in which water flows. The maximum length is the length of the ice making block formed for each ice cube in the ice tray 11. Thereby, water can be poured into the protrusion 20 without losing the surface tension of water. Further, the other direction needs to have a shorter shape. For example, a width of 2 mm to 3 mm is optimal for 5 mm or less. Thus, after the ice making is completed, the ice can be broken in the vicinity of the opening 19 by the twist for deicing applied to the ice tray 11 by the driving device 15 and the stopper 17. In other words, the projection 20 has an opening 19 which is the largest entrance, but the area is the largest, but it is convenient for smooth water supply and cutting during deicing by making it elongated. The simplest shape assumed as such an opening shape is, for example, a rectangle or an ellipse, but water reliably enters the protrusion 19 when water is supplied, and the ice breaks in the vicinity of the opening 19 when the ice is removed. Any other shape is possible as long as it is possible.

  Further, the protrusion 20 has a shape and shape that does not have an extremely thin portion, or avoids a shape that covers the water accumulation position, such as a direction and position where bubbles are unlikely to accumulate when water flows in. The shape may be selected from the shape, in which case it may be in the horizontal direction and there are no other limited elements. Similarly, the depth is a height at which bubbles are difficult to collect. As long as it is within the conditions, the protrusion 20 may not be a shape in which the shape and size of the opening 19 are pushed in the vertical direction of the opening 19 but may be a shape that is reduced or enlarged as the distance from the opening 19 increases. Further, the bottom surface of the protruding portion is not necessarily a flat surface, and may have a circular arc shape or an inclined shape such as an inverted triangle so that the water flow smoothly enters the protruding portion 20. Moreover, although the protrusion part 20 was described as an independent shape from the ease of manufacture, it may take a shape in which any number is connected as a shape in which the water flow can flow more easily. The shape of the opening that is easy to cut in the vicinity of the opening is such that the support shaft is twisted at both ends of the shaft, so that a long and narrow opening parallel to the shaft is desirable because it does not require excessive force for ice breaking. However, the shape of the opening is not limited to the straight rectangle shown in the figure, it may be wavy or square-shaped, and it should be long and long along the axis. In this case, the influence on the driving device is small.

  Although the bottom surface of the ice tray is also described as a flat surface, the present invention is not limited to this, and as shown in FIG. 5, the bottom surface of the dish is curved, V-shaped, or only the periphery of the protrusion is depressed. It may be an arbitrary shape such as an oval curve. By taking such a shape, the thickness of the ice appears to increase, so that even the same volume of ice can be seen as a large ice.

Next, the supplied water is frozen in the ice making chamber 5. Generally, freezing starts from the surface exposed to the low temperature part. At that time, ice forms crystals only with water molecules, and all substances dissolved in water (mineral components such as Ca and gaseous components such as O ₂ and CO ₂ ) are released to the unfrozen part outside the crystals. The At this time, since the freezing rate of about 5 mm / hour or less is sufficiently slow, initially the dissolved substance diffuses to the unfrozen part faster than the freezing rate, transparent ice is generated, and then reaches supersaturation. Designed with excellent design ice that has a large concentration of gas components and one or more large bubbles that suppress the scattering and reflection of light to some extent, and has an ice accent that does not affect transparency, such as glass with bubbles. Can be generated. Transparent ice is generated by this process for each block of the ice tray.

  During this freezing, cold 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 will flow. At this time, since the upper surface of the ice tray 11 is in contact with air at a lower temperature and higher wind speed than the lower surface, freezing mainly proceeds from the upper surface to the lower surface of the ice tray 11 and most of the substances dissolved in water. Diffuses toward the unfrozen portion, that is, the lower part of the ice tray 11. When the freezing further proceeds, only the protrusion 20 becomes an unfrozen part, and transparent ice is formed on the ice tray 11. Finally, the protrusion 20 is frozen in white turbidity in a form containing most of the substance dissolved in water, and ice making. Is completed.

  In this process, the ice volume increases by about 10%. Therefore, if there is no open space in which the increased volumetric ice can stretch, the ice tray may be damaged by the pressure of volume expansion. In a structure in which a partition is provided in the ice tray like the ice tray in the conventional example, pressure is applied to the partition, and the ice tray is broken from there. 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 protrusion 20, It is only as strong as an ice tray, and there is no risk of breakage. In other words, the relationship between the opening of the opening 19 and the internal volume of the projection is open without a lid that restricts the expansion of ice, and the area and direction also limit the extension of the ice to the open space. Since there is no device, a highly reliable device can be made.

  In order to perform such an operation effectively, it is necessary to install the protruding portion 20 at a site that is most slowly frozen. For example, if the ice making speed is always the same at any position on the ice water 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 protrusion 20 inside the bottom surface of the ice tray 11. The number and arrangement of the protrusions 20 are not particularly limited. Although the opening 19 and the protrusion 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.

  The protrusion 20 has a volume necessary for accumulating dissolved substances to such an extent that the transparency of ice formed on the ice tray 11 is not affected. The volume varies depending on the ice making speed, but if the ice making time is about 1 hour, the volume is about 60%, the ice making time is about 10%, and the ice making time is about 5%. Making ice in about 1 to 3 hours is practical for producing transparent ice as food for household refrigerators. In other words, if it is generated in a short time, the transparency becomes halfway, and if it takes too long, that is, if it takes a long time such as 2 mm / hour of ice generation, more transparent ice can be obtained, but it is necessary for the refrigerator. Insufficient amount of clear ice to form. However, since this depends on the amount of water to be made, it is desirable to produce transparent ice with an ice making cycle of at least 3.5 hours.

  When ice making is finished, the ice is removed. The timing of deicing is a state in which the ice deiced from the ice tray 11 is completely frozen and water does not fall from the ice tray 11 or the protrusion 20 when falling into the ice storage box 21. If this state is possible, an unfrozen portion may remain in the ice tray 11 or the protrusion 20.

  The timing for moving to the deicing operation is when the temperature sensor 18 reaches a certain temperature at which it can be confirmed in advance that ice making is complete. However, this timing may be after the elapse of a predetermined time calculated based on an arbitrary operation in the refrigerator, such as at the start of water supply or when the temperature sensor 18 after water supply detects a temperature in advance, and both temperature and time are used in combination. It is also possible to do this. By this timing detection, as described above, the ice breaks in the vicinity of the opening 19 due to the twist for deicing applied to the ice tray 11 by the driving device 15 and the stopper 17.

  At this time, the periphery of the protrusion 20 must be below a predetermined temperature. The predetermined temperature is preferably an upper limit value of a temperature range that can avoid the possibility that the peripheral portion of the ice of the protrusion 20 melts and the ice of the protrusion 20 is connected to the ice of the ice tray 11. The temperature may be lower than this.

  In addition, it is necessary to take a specification that the ice in the ice tray 11 does not break outside the vicinity of the opening 19 and quickly drops after breaking near the opening 19. First, the side surface of the ice tray 11 has a sufficient inclination angle toward the outside from the bottom surface upward. Specifically, the inclination angle of at least one of the side surfaces, for example, the surface in the vicinity of the portion having the highest residual ice property after the ice making operation of the ice tray 11 by the driving device 15 and the stopper 17 is at least 10 ° or more with respect to the vertical direction. It is desirable to take an angle. In addition to increasing the angle of inclination on the side of the ice tray in order to smoothly drop the ice released from the ice tray, the mold has been polished sufficiently to minimize friction between the ice on the side of the 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 transparent plastic product (# 2000), it is advantageous for deicing. In addition, when taking a structure like this ice tray, the ice-breaking torque is almost the same as the torque when the ice is removed from the ice tray currently generally used for automatic ice making. There is no need to add new parts when high torque is required as in an ice tray, the dimensions do not change, and manufacturing costs do not increase.

  Moreover, the effect which makes a cooling rate quicker than the ice-making tray lower part is accelerated | stimulated by taking the wider area above the ice-making tray 11 as mentioned above.

  Furthermore, when such an ice tray is inverted and twisted to remove ice, it is necessary to take specifications that the ice generated on the inner surface side of the protrusion 20 does not fall. First, it is assumed that the side surface of the protruding portion 20 has a minimum necessary inclination angle (for example, an angle of 10 ° or less) from the bottom surface to the upper side and outward. The minimum necessary tilt angle is an angle range in which ice cannot be removed by the deicing operation, but when the member made of the ice tray 11, the opening 19, and the protrusion 20 is molded, it is surely removed from the mold. Indicates that it is inside. As a result, the angle of the side surface, which is the inner surface of the ice tray, is larger than the angle of the side surface inside the projection, in other words, the side angle on the projection portion side is smaller than the side angle on the ice tray side. This difference in angle may change the angle of the mold or may change the way of polishing the portion corresponding to the side surface of the mold.

  Furthermore, the inside of the protrusion 20 is not polished. As described above, when it is desired to increase the inclination of the side surface so that the supplied water can easily flow into the protrusion 20, it is possible to keep the ice in the protrusion 20 by making the surface further rough. It will be certain.

  Furthermore, the height of the protrusion 20 is an arbitrary height at which the ice does not escape during deicing, and the radius range of the rotation trajectory defined by the position of the maximum width of the ice tray 11 and the support shaft 14 by thickening the member. It must be high enough to fit inside. The height of the protrusion 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 protrusion 20. 5, the structure of the component parts other than the ice tray 11, the opening 19, and the protrusion 20 must be changed. Therefore, as a cheaper manufacturing method, the height of the protrusion 19 is As described above, it is desirable that the ice tray 11 be within a height range that is within the radius range of the rotation locus defined by the maximum width of the ice tray 11.

  Further, as described above, the number of the protrusions 20 is not limited. For this reason, it is possible to install it at a position close to and far from the support shaft 14, but as a matter of course, the distance from the bottom surface of the ice tray 11 to the rotation trajectory is longer near the support shaft 14. Therefore, the protrusion 20 near the support shaft 14 may be longer than the protrusion 20 far from the support shaft 14. As a result, when ice making is gradually made not only from the upper surface but also from the side surface of the ice tray 11, water that contains a larger amount of a more dissolved substance and easily forms a cloudy part can be trapped and frozen in the protrusion 20. it can.

  After this deicing 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. Melting is not only from the top surface of the ice remaining on the protrusion 20, but also from the side, and the water gradually melts and melts. Therefore, when the water sufficiently flows to the bottom of the protrusion, the ice remaining on the protrusion 20 floats up. Then, mixing is performed 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.

In addition, in order to clarify the transparency of ice stored in the ice storage box 21, a color scheme that makes the transparency of the ice making box 21 clear, the blue LED irradiation, etc. can be used to effectively produce transparency. You may arrange environment, such as brightness.

  Furthermore, in order to always supply the same size of ice at the start of refrigerator operation or at the first ice making after cleaning the ice tray, that is, when water or ice does not exist in the protrusion 20 and in other cases, In the latter case, the amount of supplied water may be reduced by the volume of the protrusion 20.

  In the above description, the 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 in the vicinity of the protrusion will be described. Thereby, the substance which forms a cloudiness part can be reliably driven into a projection part, and transparent ice can be produced | generated to an ice tray, and the ice of the projection part 20 floats in the stored water of the ice tray 11 at the time of water supply after deicing. Can be shortened. Hereinafter, a description will be given with reference to FIGS. In the following description, the description that is the same as the previous description is omitted.

  6A and 6B are explanatory views of an ice making device according to the present invention. FIG. 6A is a side sectional view, FIG. 6B is a top view, FIGS. 7 and 8 are transverse sectional views of the ice tray according to the present invention, and FIG. FIG. 10 is a flow chart of an ice making process according to the present invention, FIG. 11 is a time chart of the ice making process according to the present invention, and FIGS. It is an example of the ice-making experiment result concerning this invention.

  A cord heater 22 in which a heating element such as a nichrome wire is coated with silicon rubber or the like is provided on the lower side of the ice tray 11, and as shown in FIG. 9, the protrusion 20 provided for each ice making block of the ice tray 11 is provided. It is installed so that it is in close contact. The heater 22 needs to be formed of a cold-resistant member that does not crack even at low temperatures and a flexible member that can follow the ice tray twisting at the time of deicing, such as a silicon material. Further, in order to install the heater as compactly as possible, it may be a member that does not deteriorate even when the heat generation density is high, as shown in FIG. is necessary. However, this heater does not cause any deformation or failure of the members of the refrigerator body 1 including the ice tray 11 even when the ice making chamber 5 is not sufficiently cooled and is baked without water supply, and is double insulated. It has sufficient reliability in terms of safety. Heating body of the heater attached to the ice tray is safe because it does not expose the heat generating parts such as metal surfaces because the ice tray may be touched by people or get wet. Become.

When the heater 22 is brought into close contact with the bottom surface of the ice tray 11, the freezing speed of that portion is also slowed similarly to the protruding portion 20, and a cloudy portion may be formed. However, if it is unnecessarily separated, 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 on 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 surface of the ice tray 11 than is supplied to the protrusions 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 surface of the ice tray 11 that is the first ice generation part (for example, about 2 to 5 mm). It is good to take a structure.

  Further, in order to more easily ensure the installation position of the heater 22 that is a heating means, when the heater 22 is to be installed in contact with the bottom surface of the ice tray 11, the heating element inside the cover of the heater 22 is intentionally placed in the ice tray. 11 may be formed so as to be biased to the opposite side of the bottom surface. Further, the thickness of the tray may be increased at a portion of the bottom surface of the ice tray 11 in contact with the heater 22, and a heat insulating material may be installed between the ice tray 11 and the heater 22.

  As described above, when there are two protrusions 20, they are installed so as to be sandwiched between them, but in order to keep the distance from the bottom of the ice tray 11 clear, they may be installed on the bottom of the protrusions 20 (FIG. 8 ( a)). Moreover, you may install so that the protrusion part 20 whole may be covered so that installation of the heater 22 may be easy (FIG.8 (b)). In any case, any installation position may be used as long as heat can be efficiently supplied to a position where freezing is most delayed.

  It is obvious that the heater 22 needs to be installed in the rotation locus at the time of deicing. The heater 22 is not only installed by being sandwiched between the plurality of protrusions 20, but when there is only one protrusion 20, a stop plate provided in parallel with the protrusion 20 is provided. It may be sandwiched between. Alternatively, the protrusion 20 and the heater 22 may be covered with a member having high thermal conductivity such as aluminum tape so that heat is efficiently transmitted to the entire protrusion 20. Further, a claw structure that can prevent the heater 22 from falling may be provided. Further, the claw stop structure may be integrally formed with the installation cover of the temperature sensor 18.

  In the above description, it is assumed that there is only one heater 22. However, when the amount of cooling from the top surface of the ice tray 11 is greatly different for each ice making block, for example, there is a large difference in how the cold air hits. May install a plurality of heaters 22 and give individual inputs. In addition, the heater 22 is described as being in close contact with the protrusion 20, but the heater 22 may not necessarily be in close contact with the protrusion 20 as long as a heat transfer effect equivalent to that described above can be obtained, and may be in a remote position. In addition, if the heater is covered with a heat insulating material so that most of the heat generated by the heating means is transmitted only to the second ice generation unit, which is the protrusion 20, it can be heated efficiently.

The heater 22 installed as described above may be continuously energized, but as shown in FIGS. 10 and 11, the energization is performed for a certain period after the water supply, and then the power is cut off, thereby reducing the amount of energy used and the ice making speed. Even if you raise the value, you can get highly transparent ice.

  The ice making operation including the control operation of the heater 22 will be described along 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 the determined amount of water to the ice tray 11. Immediately after the completion of the water supply performed in step 1, energization of the heater 22 is started in step 2. As a result, the ice remaining in the protrusion in the previous cycle is melted by supplying and heating water, and impurities and you spread throughout the ice tray and a part is released from the open surface. In step 3, the output of the temperature sensor 18 is set to a predetermined temperature Ta set based on a value correlated with the freezing of the water in the ice tray 11 obtained by experiments or the like, for example, a temperature lower than -1 degree. Energize a certain amount until it reaches. When the predetermined temperature Ta is reached, the heater is turned off in step 4. At this time, transparent ice is formed on the ice tray 11, but the water of the protrusion 20 is still in an unfrozen portion. When the heater 22 is turned off and heating is stopped, the unfrozen portion in the protrusion 20 is rapidly frozen. This is because the protrusion 20 loses heat supply and is exposed to the cold air forming the ice making room 5 environment of the refrigerator.

  When it is determined in step 5 that the output of the temperature sensor 18 has reached a predetermined temperature Tb set based on a value correlated with the freezing of water in the protrusion 20 obtained by experiments or the like, Move to the de-icing process starting from step 6. In step 6, the ice removing drive device 15 rotates in the normal direction to reverse the ice tray 11, and continues to operate in the normal direction until the time tr elapses in step 7. At this time, one end of the ice tray 11 is pressed against the stopper 17, the tray is twisted, and the ice on the ice tray 11 and the protrusion 20 is divided by the stress applied to the opening 19 by twisting, and the ice on the ice tray 11 is It falls into the ice storage box 21. In step 8, the driving device 15 reversely rotates and rotates the ice tray 11 toward the original position. In step 9, it continues to operate in the reverse direction until time tr elapses, and in step 10, the ice tray 11 returns to the original position. Then, the driving device 15 stops. At the time of this ice removal, the ice in the protrusion 20 remains as it is. In step 11, it is detected whether or not the ice storage box 21 is full of ice, and the process of supplying water, making ice, and removing ice is a one-cycle ice making process. The process returns to step 1 until the ice is full and the ice making operation cycle is repeated. .

  An example of the experimental results based on the above control is shown in FIG. 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 energization amount of the heater 22 is small or when the heater 22 is cut off too early. Moreover, a slow thing is a case where the amount of electricity supply of the heater 22 is large, or the timing which cuts off the heater 22 is too late. Furthermore, if the amount of water supplied is changed, the smaller the amount of water, the faster the ice making time for obtaining the same transparency as shown by the one-dot chain line, and the larger amount of water for obtaining the same transparency as shown by the broken line. The ice making time is slow. If it is desired to quickly fill the ice even if the transparency is slightly lowered, the temperature Ta may be increased or the energization amount may be kept low. If a large amount of transparent ice is not required, it is better to lower the set temperature Ta or increase the energization amount and further increase the amount of water.

  The capacity of the heater 22 is determined by the cooling capacity. If the cooling capacity increases, it is necessary to select a heater 22 having a proportionally large capacity. However, at this time, when the ice storage box 21 is provided in the ice making chamber 5, it is necessary to prevent the ice stored in the ice storage box 21 from being melted by the radiant heat from the heater 22. FIG. 13 shows a temperature change at the center when a substance having a certain heat capacity is placed in an ice storage box. There is no significant change in temperature before and after the start of energization of the heater 22, and the temperature does not increase significantly while the heater 22 is energized. Therefore, it can be seen that it is possible to study a structure that hardly affects the ice in the ice storage box 21 with the structure of the ice making room 5 of a normal household refrigerator.

  It should be noted that the energization timing of the heater 22 is set immediately after the completion of the water supply. However, any time may be used as long as the current that can be energized before the water flowing into the protrusion 20 starts to freeze, for example, at the same time as the start of water supply or a temperature sensor. It may be when the temperature detected at 18 reaches a predetermined temperature, or when a predetermined time elapses from these timings.

  The same applies to the timing at which the heater 22 that stops heating the projection 20 is turned off, and the water supplied to the ice tray 11 is almost frozen in addition to when the temperature detected by the temperature sensor 18 reaches a predetermined temperature. However, any timing may be used as long as it can be disconnected when a large number of unfrozen portions remain on the protrusion 20, for example, after a predetermined time has elapsed from the energization start timing of the heater 22 or the energization start timing of the heater 22. May be when the temperature detected by the temperature sensor 18 reaches a predetermined temperature after a predetermined time has elapsed.

  Further, although the energization amount of the heater 22 during ice making is made constant, this may be arbitrarily changed. For example, by increasing / decreasing the energization amount of the heater 22 as the cooling amount increases / decreases due to the compressor on / off of the refrigerator, the power consumption during ice making can be reduced while increasing the ice making speed without affecting the transparency. In addition, reducing the amount of energization or de-energizing at the time of defrosting when no cold air is blown to the ice tray can also reduce the power consumption during ice making while increasing the ice making speed without affecting the transparency.

  Next, a method for cleaning the ice tray will be described. A control board (not shown) provided in the refrigerator stores the number of times of ice making. When the predetermined number of preset times is reached, cleaning is recommended to the end user by, for example, blinking an LED on an operation panel (not shown). For example, the end user operates a cleaning mode by pressing a cleaning switch installed on a small operation panel (not shown). Thereby, energization of the heater 22 is started, the ice in the protrusion 20 is melted, and then a mechanism that allows the ice tray to be reversed and drained is provided. Thereby, even if the mineral component contained in the supply water remains in the protruding portion 20, it can be removed, so that transparent ice can be obtained cleanly indefinitely. The drainage mechanism only needs to store the drainage that flows out from the protrusion 20 during normal rotation when the ice tray is inverted, and the size is not increased by a simple mechanism. Further, water may be supplied to promote melting. Further, the operation of water supply and drainage may be performed a plurality of times so that the cleaning effect is improved.

  As another cleaning method, when the cleaning mode is operated, water is supplied to the ice tray 11 and ice is made. After the ice making is completed, the heater 22 is energized only for a period of time when only the ice around the protrusion 20 can be melted. The mineral component remaining on the protrusion 20 may be removed by discharging the ice tray 11 and the ice formed on the protrusion 20 in a connected state.

  Further, the refrigerator body 1 is provided with a switch that allows the end user to select normal ice making and transparent ice making. When normal ice making is selected, the operation of the heater 22 is stopped and ice making is performed in a preset time. Since switching is possible, the power consumption can be saved by the end user.

  The refrigerator according to the present invention is a single-structure ice tray that is partitioned into a plurality of ice making blocks and stores water to make ice, and is equipped with an ice making tray provided with a plurality of ice generating units for each ice making block, and the transparent portion of the ice and the cloudiness It is an ice making device that can provide transparent ice to the end user by separating the parts. As a result, transparent ice can be obtained with almost the same structure and dimensions as an ice making apparatus provided in a conventional refrigerator, with little increase in energy. A first ice generating unit having a hole in a part of an ice tray for storing water and making ice and a second ice generating unit having an opening having the same shape as the hole provided in the first ice generating unit are integrated. Such a single-structured ice tray is manufactured by simply injecting molten resin into a cavity between two molds and molding the ice tray and projections into a simple one. It can be manufactured in a short time with a manufacturing device. Moreover, it corresponds to the inside of the mold corresponding to the upper ice tray so that the inner surface of the first ice generating portion of the ice tray is smoother than the inner surface of the second ice generating portion. The surface of the wall surface to be smoothed can be left as it is without polishing the wall surface corresponding to the inside of the lower projection.

  The ice tray inner side surface and the protrusion inner side surface 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. By making the angle larger than the inclination angle from the lower surface side to the upper surface side of the side surface of the plate of the second ice generating unit, which is a protruding portion, it is easy to release ice from the ice tray, and the protruding portion The ice does not deice easily. In this case, in the first ice generating part, the side surface of the ice tray may be inclined outward from the lower surface side to the upper surface side at a large angle to facilitate ice detachment, but it may be determined by the twist angle because it is twisted. Therefore, it is sufficient that the ice block is easily removed from the upper ice tray and is not easily removed from the lower protrusion.

  It is desirable that at least the cooling means cools the surface facing the heating means, with respect to the heating means close to the second ice generating portion which is the protrusion of the present invention. It is desirable that this heating means be separated from the first ice generating unit.

  Next, a description will be given of a method for producing a large transparent ice having a good appearance (good design) required when drinking whiskey in a rock or in water (clear ice larger than the size of normal ice by normal ice making). . The purpose of the present embodiment is to obtain ice having a size that satisfies the user by changing the amount of water supplied to the ice tray 11. FIG. 14 is a diagram illustrating the flow of the ice making process of the refrigerator representing the first embodiment of the present invention, and FIG. 15 is a diagram illustrating a time chart of the ice making process when the amount of water supply is varied.

  The ice making operation including the control operation 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 of the refrigerator main body or the inner wall of the refrigerator (not shown), and the user makes the ice making mode switching button transparent ice. In the case where the transparent ice selection button is provided instead of the switching button, it is determined in step 31 whether the transparent ice making mode is selected, such as whether the transparent ice button has been pressed or not, and the water supply amount is adjusted. I do.

  If the transparent ice making mode is selected in step 31, a control device (not shown) receives a transparent ice production command in step 31 and a feed water pump drive time t1 preset in the control device is received in step 31. 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 supply pump 23 is driven for the water supply pump drive time t2 set in advance in a control device (not shown) in step 33 to supply water to the ice tray 11. At this time, the pump drive time t1 is longer than the drive time t2, and may be set to about t1 / t2 = 1.1-3, such as t1 = 10 seconds and 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.

  When water is supplied to the ice tray 11 in step 33, the process proceeds to step 37 as it is. At this time, the ice remaining in the protrusion 20 of the ice tray 11 in the previous cycle is melted by supplying and heating water, and impurities and bubbles are spread throughout the 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, energization of the heater 22 is started in step 34 immediately after the completion of water supply. At this time, the ice remaining on the protrusion 20 of the ice tray in the previous cycle is dissolved by the current water supply and heating by the heater 22, and impurities and bubbles are spread throughout the ice tray and a part of the ice tray 11 is partially melted. Released from the open surface.

  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 the water in the ice tray 11 obtained by an experiment or the like. A certain amount of power is applied until the value is reached. When the predetermined temperature Ta is reached, in step 36, the power supply to the heater 22 is cut off. At this time, transparent ice is formed in the first ice generating part in the ice tray 11, but the water of the protruding part 20 is still in a state where an unfrozen part remains. When the heater 22 is turned off and the heating is stopped, the inside of the second ice generating part in the protrusion 20 is rapidly frozen. This is because the cold air of -18 degrees forming the freezer compartment of the refrigerator is supplied.

  When it is determined in step 37 that the output of the temperature sensor 18 has reached a predetermined temperature Tb set based on a value correlated with the freezing of the water in the protrusion 20 obtained by experiments or the like. The process proceeds to the de-icing process starting from step 38. Here, 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. In addition, the set value Tb may be changed according to the ice making mode. In step 38, the ice removing drive device 15 rotates in the normal direction to reverse the ice tray 11 and continues to operate in the normal direction until the time tr elapses in step 39.

  At this time, one end of the ice tray 11 is pressed against the stopper 17, the tray is twisted, and the ice on the ice tray 11 and the protrusion 20 is divided by the stress applied to the opening 19 by twisting, and the ice on the ice tray 11 is It falls into the ice storage box 21. In step 40, the driving device 15 reversely rotates, rotates the ice tray 11 toward the original position, and continues to operate in the reverse direction until time tr elapses in step 41. In step 42, the ice tray 11 returns to the original position. Then, the driving device 15 stops. At the time of this ice removal, the ice in the protrusion 20 remains as it is. In step 43, it is detected whether or not the ice storage box 21 is full of ice, and the process of supplying water, making ice, and removing ice is a one-cycle ice making process. The process returns to step 31 until the ice is full and the ice making operation cycle is repeated. .

  In addition, when generating transparent ice, increasing the amount of water supply in this way can generate large ice in the transparent ice generating means, leading to improvement in the design of the ice, so the first described in the present embodiment. It is also effective in cases other than the transparent ice making system using the ice tray provided with the ice generating part and the second ice generating part.

  As described above, the present invention can avoid the formation of irregular ice without significantly changing the components of the ice making chamber of a normal refrigerator in which an automatic ice making apparatus is installed, and can be easily manufactured. An ice tray can be manufactured at low cost, and an ice making device excellent in cleanability can be provided without adversely affecting the ice in the ice storage box. As a result, a practical refrigerator can be obtained. In addition, it is equipped with water supply amount variable means that makes the water supply time (pump drive time) variable to the ice tray, so that the design can be improved by increasing the water supply time to make the water supply time longer than usual. Can produce large transparent ice.

  The ice making tray 11 is configured to store water in each of a plurality of partitioned ice making blocks, receive ice to make ice, and make ice generated by applying mechanical force, and the amount of water supplied to the ice making tray. And a control device which is a water supply amount adjusting means for changing the water supply amount, and when the transparent ice production instruction is received, the water supply amount to the ice tray 11 is increased. The amount of water supplied to the water increases, and large transparent ice suitable for drinking whiskey in the rock or with water is obtained, and transparent ice that looks delicious with good design is obtained.

It is front sectional drawing of the domestic refrigerator-freezer to which the ice making apparatus in Embodiment 1 of this invention was applied. It is explanatory drawing of the ice tray in Embodiment 1 of this invention. It is a top view of the ice making device in Embodiment 1 of the present invention. It is a cross-sectional view of the ice making device in Embodiment 1 of the present invention. It is a cross-sectional view of the other ice making apparatus in Embodiment 1 of this invention. It is a sectional side view of the other ice making apparatus in Embodiment 1 of this invention. It is a cross-sectional view of the other ice making apparatus in Embodiment 1 of this invention. It is a cross-sectional view of the other ice making apparatus in Embodiment 1 of this invention. It is a bottom view of the ice making device in Embodiment 1 of the present invention. It is a figure explaining the flow of the ice making process in Embodiment 1 of this invention. It is a figure explaining the time chart of the ice making process in Embodiment 1 of this invention. It is a figure explaining an example of the ice-making experiment result in Embodiment 1 of this invention. It is a figure explaining an example of the ice-making experiment result in Embodiment 1 of this invention. It is a figure explaining the flow of the ice making process in Embodiment 1 of this invention. It is a figure explaining the time chart of the ice making process in Embodiment 1 of this 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 apparatus, 16 Frame, 17 Stopper, 18 Temperature sensor, 19 Opening part, 20 Protrusion part, 21 Ice storage box, 22 Heater, 23 Water supply pump

Claims (20)

A plurality of ice making blocks that store water supply and receive ice to make ice and make ice that is generated by applying mechanical force to ice making trays, and ice making blocks partitioned by the ice making plates A first ice generating unit that is provided with cold air and promotes ice making; and the first ice generating unit and the first ice generating unit are connected to the first ice generating unit and an opening to communicate the water supply. A second ice generating unit that delays ice making by reducing the influence of cold air from the first ice generating unit, and the ice that is continuously produced through the opening to the ice generated by the first ice generating unit And an ice produced by a second ice producing unit, wherein the opening has a size and shape that allows the ice near the opening to be cut by receiving the mechanical force. Water is stored in each of the plurality of partitioned ice making blocks, and ice is made by receiving cold air, and twisted and the generated ice is de-iced, and the ice making blocks provided in the ice making blocks are provided with cold air. Receiving the first ice generating unit that promotes ice making, and the water supply communicates between the first ice generating unit and the opening provided in the ice making block, and receives cold air from the first ice generating unit. A second ice generator that is capable of delaying ice making with less influence and having a size and shape that makes it more difficult for the ice generated from the first ice generator to be separated from the ice tray. An ice making device, wherein the ice produced by the first ice producing unit cut in the vicinity of the opening when the ice making tray is twisted is deiced. Water is stored in each of a plurality of partitioned ice making blocks to receive cold air to make ice, and the generated ice can be deiced, and the ice making blocks partitioned by the ice making tray receive cold air. The first ice generating unit that promotes ice making, and the water supply communicates between the first ice generating unit and the opening provided below the ice making block, and is affected by cold from the first ice generating unit. Generated in the second ice generation unit that delays ice making and the ice generated in the first ice generation unit continuously through the opening. Ice, and the first ice generating unit is opened to an open surface of the ice tray, and the second ice generating unit is opened to be expandable to an opening communicating with the first ice generating unit. An ice making device characterized by that. Water is stored in each of a plurality of partitioned ice making blocks to receive cold air to make ice, and the generated ice can be deiced, and the ice making blocks partitioned by the ice making tray receive cold air. The first ice generator and the water supply communicate with each other through the first ice generator that promotes ice making and an opening provided below the ice making block, and receive cold air from the first ice generator. A second ice generating part that delays ice making with less influence, and the second ice generating part has a shape protruding downward from the first ice generating part formed in the ice making block. An ice making device characterized by that. Water is stored in each of the plurality of partitioned ice making blocks, and ice is made by receiving cold air, and twisted and the generated ice is de-iced, and the ice making blocks provided in the ice making blocks are provided with cold air. Receiving the first ice generating unit that promotes ice making, and the water supply communicates between the first ice generating unit and the opening provided in the ice making block, and receives cold air from the first ice generating unit. A second ice generator that can delay ice making with less influence, and the volume of the second ice generator is 10-20 percent of the volume of the first ice generator. Ice making equipment. Water is stored in each of a plurality of partitioned ice making blocks to receive cold air to make ice, and the generated ice can be deiced, and the ice making blocks partitioned by the ice making tray receive cold air. A first ice generator that promotes ice making, and the water supply communicates at the first ice generator and the opening provided in the ice making block so as to delay ice making from the first ice generator. An ice making device, wherein the heating means stops the heating according to the temperature of the first ice producing unit. Water is stored in each of a plurality of partitioned ice making blocks to receive cold air to make ice, and the generated ice can be deiced, and the ice making blocks partitioned by the ice making tray receive cold air. A first ice generator that promotes ice making, and the water supply communicates at the first ice generator and the opening provided in the ice making block so as to delay ice making from the first ice generator. A second ice generator heated by the means, and the second ice generator is shaped to protrude downward from the first ice generator formed above the ice tray, The ice making apparatus, wherein the heating means is provided on at least one surface of the second ice generating unit. The ice making device according to claim 6 or 7, wherein the heating means is a double insulation of a heater body. The ice making device according to any one of claims 6 to 6, wherein a heater body of the heating means is provided at a position separated from the first ice generating unit by a predetermined dimension or more. The volume of the said 2nd ice production | generation part is smaller than the volume of the said 1st ice production | generation part, and is provided in the dimension within the rotation radius of the said ice tray, The any one of Claim 1 thru | or 9 characterized by the above-mentioned. An ice making device according to claim 1. The ice making apparatus according to any one of claims 1 to 10, wherein the ice tray is formed by pouring molten resin into a cavity between two molds. 12. The ice making apparatus according to claim 11, wherein the surface of the mold forming the inner surface of the first ice generating portion of the ice tray is polished to the level of a plastic product. . 13. A water supply amount adjusting means for changing the amount of water supplied to the ice tray is provided, and the amount of water supplied to the ice tray is increased when a production instruction for transparent ice is received. The ice making device according to any one of the above. A refrigerator-freezer, wherein the ice tray according to any one of claims 1 to 13 is placed in an ice making chamber, and cooled cold air is blown from above the ice tray. A step of accelerating the ice making of the first ice generating unit provided in the ice making chamber by blowing cool air from above the ice tray to open the top surface of the ice tray, and provided below the first ice generating unit. Heating a second ice generating unit communicating with the first ice generating unit to delay ice making relative to the first ice generating unit, and heating according to an ice generation state in the first ice generating unit And stopping the ice making, and adding a twist to the ice tray to cut the ice of the second ice generating unit and the ice generated by the first ice generating unit. And ice making method. After removing the ice from the first ice generating unit of the ice tray, water is supplied to the ice tray, and the second ice generating unit is heated to produce ice in the first and second ice generating units. The ice making method according to claim 15, further comprising: a step of changing a cycle time of the ice making and deicing according to a heating state in the second ice generating unit. The ice making method according to claim 15 or 16, wherein one cycle of ice making and de-icing performed in the ice tray is performed within 3.5 hours. 18. The ice making method according to claim 15, further comprising a water supply amount adjusting step of changing a water supply amount from the water supply tank to the ice tray by changing a driving time of the water supply pump. 19. The ice making method according to claim 18, wherein the water supply amount adjusting step increases the water supply amount to the ice tray by extending the driving time when receiving a transparent ice production instruction. Water is stored in each of a plurality of partitioned ice making blocks, and ice is made by receiving cold air. At the same time, ice produced by applying mechanical force can be deiced, and the amount of water supplied to the ice making tray is variable. A water supply amount adjusting means, wherein the water supply amount to the ice tray is increased when a transparent ice production instruction is received.

Images