CN1532484A - Ice making device, freezing refrigerator, ice making method - Google Patents

Abstract

Provided is 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. 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.

Description

Ice making device, freezing refrigerator, ice making method

technical field

The present invention relates to a technique for obtaining highly transparent ice by separating dissolved gas components and ion components in water supplied to an ice making tray when ice is produced in an ice making device.

Background technique

In the past, in household refrigerators, etc., as an automatic ice maker that has been popularized, water supplied from a water supply device is stored in an ice tray to make ice, and after ice is made, the drive device reverses the ice tray to make ice Leave to store on the ice. Generally, however, cloudy ice forms.

Generally, where a substance forms a crystal, the crystal is formed from a single component. The same is true when water is frozen into ice. Therefore, impurities dissolved in water are discharged to the ice-water interface during the freezing process, and the impurities at the ice-water interface become a supersaturated state. When the growth rate of the ice is higher than the diffusion rate of the impurities in the supersaturated water layer in the water, the ice grows while taking in the impurities, and the ice becomes cloudy due to the taken in impurities.

Ice appears cloudy because a portion of the ice that appears white due to reflected light is formed. This is because substances dissolved in water, especially dissolved gas components (CO ₂ , O _{2 ,} etc.) are enclosed in the ice as microscopic air bubbles. Light entering the ice is refracted or reflected at the surface of the air bubbles. Even if the volume of gas components is the same, the probability that the path of light will be changed correspondingly increases when a large number of finer bubbles are formed, that is, the light is easy to be diffusely reflected, so it appears white.

However, ice that is generally seen is not considered transparent, and is multi-ice formed by agglomeration of multiple single-crystal ices, and substances dissolved in the supplied water often remain between the crystals. Therefore, the purpose of making transparent ice is not so much to improve the actual taste of the ice as to pursue the visual delicacy and appearance beauty, which has become a big problem in refrigerators related to food, and many known technologies have been known. .

For example, an automatic ice maker in which an ice tray is formed into a double-layer structure connected by a plurality of small holes (refer to Patent Document 1), and the ice tray is mounted on an open surface of a heat insulating tank provided with a heater has been proposed (refer to Patent Document 2). In addition, there is a technique of storing water with impurities, separating and discharging water, and pumping water to a part (refer to Patent Document 3).

(Patent Document 1)

Japanese Patent No. 2524811 (Figure 6, Figure 10, etc.)

(Patent Document 2)

Japanese Publication No. 6-4561 (Figure 1, etc.)

(Patent Document 3)

Japanese Patent Registration No. 2781429 (Claim 1 etc.)

In the past ice-making devices, if the hole connecting the part where the transparent ice is obtained and the part where the cloudy water is collected is small, the water will not enter the lower wall under the action of the surface tension of the water, and cloudy ice may appear on the upper wall, or there may be ice caused by ice. The pressure generated by the volume expansion of the ice maker will cause the risk of damage to the ice tray. In addition, air bubbles may accumulate in the lower part of the separator during water supply. The air bubbles and the ice surface of the upper plate freeze, float up after the degassed surface disappears, and thus form irregular ice. In addition, when the ice is released, the thickness of the solid layer increases along the entire bottom surface of the pan, so that the torque when the ice is released increases, and there is a problem that not only the size of the motor is increased, but also unnecessary energy is required. In addition, after leaving the ice, in order to melt the ice on the lower tray, it is necessary to continuously power on for 30 to 60 minutes at a high input of about 10W, which may affect the ice in the water storage tank under the ice tray and other chambers, and deteriorate the power consumption. lead to impractical problems. In addition, a mechanism for returning water after melting ice to a water supply tank, a dehydration cage for scooping up ice from water to dry it, etc., complicate the structure, increase the size, and increase the manufacturing cost.

Contents of the invention

The present invention was made to solve the above problems, and its object is to provide an ice making device and an ice making method that can eliminate the appearance of ice and eliminate the need to treat cloudy ice melting water. The mechanism can refine high-transparency ice with cheap components. Another object of the present invention is to obtain an apparatus and method capable of producing transparent ice easily and with little energy. Another object of the present invention is to provide a practical refrigerator capable of obtaining delicious-looking transparent ice without reducing the space of a food storage portion.

The ice making device of the present invention includes an ice making tray, a first ice generating part, a second ice generating part, and ice generated by the second ice generating part; The ice area accepts cold air to make ice, and applies mechanical force to make the generated ice leave; the first ice generating part is set in the ice making area divided in the ice making tray, and accepts cold air to promote ice making; the second ice The generating part is integrally provided with the first ice generating part, and the water supplied is communicated with the first ice generating part through the opening part, and the water supplied is also communicated, so that the influence of cold air is reduced compared with the first ice generating part, and the ice making is slowed down; The ice generated by the second ice generating part is connected to the ice generated by the first ice generating part through the opening; the opening is formed in a size and shape that can accept mechanical force to cut off the ice near the opening.

The ice-making device of the present invention includes an ice-making tray, a first ice-generating part, and a second ice-generating part; the ice-making tray stores supplied water in a plurality of divided ice-making areas, receives cold air to make ice, and The generated ice can be separated by applying torsion force; the first ice forming part is set in the ice making area divided in the ice making tray, and accepts cold air to promote ice making; the second ice forming part is set in the ice making area, through the opening Part of the water that is communicated and supplied with the first ice forming part is also communicated, and the influence of the cold air is reduced compared with the first ice forming part, so that the ice making is slowed down, and the ice formed is formed so that the generated ice is more dense than the first ice forming part. Difficult to separate from the size and shape of the ice tray; the ice tray accepts torsional force, and the ice generated by the first ice generation part cut near the opening part leaves.

The ice making device of the present invention includes an ice making tray, a first ice generating part, a second ice generating part, and ice generated by the second ice generating part; The ice area accepts cold air for ice making and allows the generated ice to leave; the first ice generating part is set in the ice making area divided in the ice making tray, and accepts cold air to promote ice making; the second ice generating part is set Below the ice-making area, the water that is communicated with and supplied to the first ice-generating part through the opening part is also communicated. Compared with the first ice-generating part, the influence of cold air is reduced and the ice-making is slowed down; The ice generated by the generating part is connected to the ice generated by the first ice generating part through the opening part; the first ice generating part is opened on the open surface of the ice making tray, and the second ice generating part can communicate with the first ice generating part The opening portion of the opening expands open.

The ice-making method of the present invention includes the step of blowing cold air from above the ice-making tray arranged in the ice-making chamber to promote the ice-making step of the first ice-generating part provided by opening the upper surface of the ice-making tray. The step of heating the second ice forming part below the first ice forming part and communicating with the first ice forming part to make ice production slower than that of the first ice forming part, after stopping the heating according to the state of ice forming in the first ice forming part The step of making ice, and the step of applying a twisting force to the ice making tray to cut off the ice formed in the second ice forming part and the ice formed in the first ice forming part.

Description of drawings

Fig. 1 is a front sectional view of a domestic 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 in Embodiment 1 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 an explanatory view showing the flow of the ice making process in Embodiment 1 of the present invention.

Fig. 11 is a timing chart illustrating an ice making process in Embodiment 1 of the present invention.

Fig. 12 is a diagram illustrating an example of the results of an ice-making experiment in Embodiment 1 of the present invention.

Fig. 13 is a diagram illustrating an example of the results of an ice-making experiment in Embodiment 1 of the present invention.

Fig. 14 is a diagram illustrating the flow of the ice making process in Embodiment 1 of the present invention.

Fig. 15 is a timing chart of the ice making process in Embodiment 1 of the present invention.

Detailed ways

Implementation form 1

Embodiment 1 of the present invention will be described below with reference to FIGS. 1 to 5. FIG.

Fig. 1 is a front sectional view of a household freezer to which the ice making device of the present invention is applied, illustrating the state in which the front door is removed. Figure 2 (a) is a side sectional view of the ice-making tray of the present invention, (b) is a top view of the ice-making device, Figure 3 is a top view of the ice-making device, and Figures 4 and 5 are cross-sections of the ice-making device of the present invention .

The freezer main body 1 is composed of an outer case 2, an inner case 3, and an insulating material 4 filled between the outer case 2 and the inner case 3, and is provided with a plurality of partitions for storing food, and has a refrigerating chamber 6 arranged on the top of the ice-making chamber 5 , the vegetable compartment 7 arranged at the bottom of the ice-making compartment 5, the switching compartment 8 and the freezing compartment 9 etc. which can be arbitrarily set temperature by the user using an operation panel not shown in the figure provided on the door of the freezer main body 1, etc. The partition wall 10 filled with the heat insulating material 4 which divides and forms each chamber partitions. In FIG. 1 , an example in which storage bin 21 and ice tray 11 are housed in the same ice making compartment 5 has been described, but they may be provided in another compartment. In addition, the operation panel not shown in the above figure can allow the user to select the temperature adjustment and operation mode of each compartment of the refrigerator, or display the current temperature and operation mode of each compartment to notify the user.

The ice-making tray 11 described in Fig. 2, Fig. 3 etc. is set in the ice-making compartment 5, is a molded product made of a resin material such as polypropylene, has an opening on the top, and its inner side is divided into a plurality of ice-making areas formed in a concave shape, As shown in the air flow in Fig. 2 (a) (b), the cold air blown from the wall surface of the refrigerator to the open surface on the top of the ice tray 11 is received by the blower to generate ice from the upper part, and the cold air that cools the upper part is circulated to the lower part. , is sucked into the refrigerator wall again. As shown in FIG. 3, the wall surfaces between the adjacent ice-making regions are connected by cut grooves for making it easy for supplied water to flow into each region provided on the inner side of the tray. In addition, as shown in FIG. 1, a water supply pipe 13 is provided to allow water to flow from the water supply tank 12 storing the water supplied to the ice tray 11 to the ice tray 11. Although not shown in the figure, the actual A heater for preventing freezing is provided at the outlet of the water supply pipe 13, and a solenoid valve of the water supply pipe is opened and closed according to an instruction from a control device to supply a certain amount of water to the ice tray 11. A drive unit 15 is provided on the bracket 16, and the drive unit 15 is provided with a motor, a reduction gear, and the like for rotationally driving the support shaft 14 of the ice tray 11 shown in FIG. 2 . One end of the support shaft 14 communicates with the bracket 16 supporting the ice-making tray 11, and the other end is connected to the above-mentioned driving device 15 to drive it when leaving the ice. The inversion of the disc 11 applies a torsional force to the stop member 17 for deicing. When twisting is applied to the ice tray, the driving device rotates the support shaft, and even if the ice tray is stopped by the stopper member 17, it further rotates around the support shaft by, for example, 45°, thereby applying twist to the ice tray. Deform the ice tray with the drive unit side.

Install the temperature sensor 18 shown in FIG. 4 at a position where it can be confirmed that the water in the ice tray 11 is basically frozen, such as the lower part of the ice tray 11. It is composed of thermal insulation material under the thermistor. A groove-shaped protruding part 20 is protrudingly provided downward, and the protruding part 20 is integrally formed with the opening part 19 provided on the bottom surface of the ice making tray 11, and is connected to the ice making tray 11 by the opening part 19 for storing and supplying of water. The protruding portion 20 is provided for the plurality of divided upper ice-making areas, and there is a storage bin 21 below the ice-making device for receiving and storing ice turned away from the ice-making tray 11 . The ice-making section of the ice-making tray is composed of a plurality of first ice-generating parts as the ice-making area part on the upper part and a groove-shaped convex part 20 with a much smaller inner volume, that is, the second ice-generating part.

Although not shown in the figure, the main body 1 of the freezer has a compressor for compressing the refrigerant, a capillary tube for throttling the refrigerant, and a condenser for releasing the heat of the refrigerant in a gaseous state to the outside of the refrigerator to condense it. , the cold and heat obtained by vaporizing the liquid refrigerant cools the air in the box, and the refrigeration cycle such as the cooler, through which the cold air is sent to the ventilation pipe and the blower of each room, and the cold air supply of each room is adjusted Control devices such as cold air circulation devices such as volume baffles, and control boards that control the operation of various equipment in the refrigerator. These devices supply cold air, change the temperature of each room in the refrigerator, and perform control such as maintaining a predetermined temperature, defrosting or ice making, and lighting.

Next, an example of the steps of the ice making operation in this embodiment will be described with reference to FIGS. 2 to 5 . First, water is supplied from the water supply tank 12 to a part of the ice making tray 11 through the water supply pipe 13, and the water is supplied to each ice making zone through the cut groove. At this time, water is also supplied to the convex portion 20 through the opening portion 19 . The cut groove may be provided at a position in series with the opening portion 19 so that water does not easily flow into the raised portion 20 . In addition, when there are a plurality of openings 19, a plurality of notches may be provided on the wall surface between one ice making zone in series with each opening 19.

In the accompanying drawings and descriptions of the present invention, the example in which a plurality of raised portions 20 are arranged in the shape of grooves elongated in the axial direction has been described by each region below, which is to make it easy to displace the ice tray when leaving the ice. Twist, so that the torque of the motor does not have a large difference from the past, the raised portion 20 is limited within the radius of rotation when the ice-making tray is reversed, and the overall size of the ice-making device, such as the position of the raised portion, is not increased. And the size, shape, direction, etc. are easy to twist the position, size, shape, direction, etc. of the ice-making tray, which can be limited to the radius of rotation. If it does not exceed the radius of rotation too much, it can of course be a circular continuous groove. The raised portion is not provided for each zone but is connected to a plurality of zones, or an opening is provided on the inner side of the ice tray. In addition, if the internal volume of the second ice forming part is increased too much, it will take time to form transparent ice, and the energy used will increase. On the other hand, when it is too small, only ice with reduced transparency can be obtained. When it is desired to generate transparent ice within a practical time such as 3.5 hours without adding too much energy, the internal volume of the raised portion is preferably about 10-20% of the internal volume of the ice tray away from ice.

The opening portion 19 is formed in a shape extending in at least one direction in which water flows. The maximum length is the length of the ice-making regions of the ice-making tray 11 where one grain of ice is formed. Water can thereby flow into the raised portion 20 against the surface tension of the water. The other direction needs to be a shorter shape. For example, the width is 5 mm or less, preferably 2 to 3 mm. In this way, after the ice making is finished, the ice is broken near the opening portion 19 by the twisting force applied to the ice making tray 11 by the driving device 15 and the stopper member 17 for separating the ice. That is, the convex portion 20 is suitable for both smooth water supply and ice breaking when the area of the opening portion 19 as the inlet thereof is maximized but is elongated. The simplest conceivable shape of such an opening is, for example, a rectangle or an ellipse. However, as long as water enters reliably when water is supplied to the opening 19 and the ice breaks near the opening 19 when leaving the ice, it can also be any other shape.

In addition, the protruding part 20 can be selected from a direction, a position, and a shape that are not easy to collect air bubbles when water flows in, such as avoiding forming a shape without extremely thin parts, and covering a place where water accumulates with a cover. In this case, It can also be horizontal, without other restrictive elements. In addition, the depth is also a height at which air bubbles are less likely to accumulate. If this condition is satisfied, the convex portion 20 may not be a shape and size that protrude from the opening portion 19 in the vertical direction of the opening portion 19 but may be a shape that shrinks or expands as it moves away from the opening portion 19 . In addition, the bottom surface of the raised portion does not have to be a flat surface, and may have an arc shape or an inclined shape, for example, an inverted triangle, so that water can smoothly enter the raised portion 20 . In addition, the protrusions 20 are described as separate shapes for ease of manufacture, but any number of them may be connected as a shape that facilitates the flow of water. The shape of the opening that is easy to cut near the opening is a shape in which the supporting shaft is twisted at both ends of the shaft, so it is preferable to be an elongated opening parallel to the shaft so that no extra force is required to break the ice. However, in addition to the straight rectangle shown in the figure, the shape of the opening may be wavy or く-shaped, as long as it is slender along the axis. In addition, it may be any shape such as a slender shape connected by circles, as long as the force does not increase. , the influence on the driving device is small.

Although the bottom surface of the ice tray is described as a plane, it is not limited thereto. As shown in FIG. 5 , the bottom surface of the tray can be curved or V-shaped, or only the convex portion can be bent in a concave shape or any other shape. With such a shape, the thickness of the ice appears to be increased, and therefore, the effect of looking like large ice can be obtained even with the same volume of ice.

The supplied water is frozen in the ice making compartment 5 . Generally, it starts to freeze from the surface exposed to the low temperature part. At this time, ice forms crystals only from water molecules, and substances dissolved in water (mineral components such as Ca and gas components such as O ₂ and CO ₂ ) are completely released to unfrozen parts outside the crystals. At this time, the freezing speed of about 5mm/hour or less is sufficiently slow, so that in the initial stage, the dissolved substance diffuses to the unfrozen part faster than the freezing speed, and transparent ice is formed, after which, the supersaturated gas component gathers More often, one or more large air bubbles that suppress diffuse reflection of light to some extent are formed, and ice with excellent appearance can be produced, such as glass with air bubbles, in which protruding points of ice that do not affect transparency are obtained. Clear ice is produced by this process for each area of the ice tray.

When the freezing is performed, cold air is supplied from the top of the ice tray 11 so that the freezing speed is lower than the diffusion speed, and flows through the space between the storage bin 21 and the bottom of the ice tray 11 through the gap between the side of the ice tray 11 and the bracket 16. . At this time, the top of the ice making tray 11 is in contact with the air with a lower temperature and a higher wind speed than the bottom, so the freezing mainly proceeds from the top of the ice making tray 11 downward, and the substances dissolved in water basically move towards the unfrozen part, that is, the ice making. The lower part of the disk 11 is diffused. When freezing further proceeds, only the raised portion 20 becomes an unfrozen portion, forming transparent ice in the ice tray 11, and finally, the raised portion 20 freezes in a cloudy form containing almost all substances dissolved in water, and the ice making process is completed. ice.

During this process, the volume of the ice increases by about 10%. Thus, when there is no open space to allow the increased volume of ice to stretch, the pressure of the possible volume expansion could break the ice tray. In the structure in which the partition wall is provided in the ice tray as in the conventional example, pressure acts on the partition wall, thereby causing the ice tray to be damaged. In the present invention, the ice in the ice making tray 11 and the raised portion 20 can be stretched towards the open space above the ice making tray 11 by an amount equivalent to the volume expansion, so the ice making tray 11 and the raised portion 20 are applied with the usual The same level of force as the ice tray, without the risk of breakage. That is, the relationship between the opening as the opening portion 19 and the internal volume of the raised portion is that the expansion of the relative ice does not limit the cover to it, and the area and direction do not limit the extension towards the open space on the ice. Therefore, it is possible to obtain High reliability device.

In order to perform such an operation efficiently, it is necessary to provide the convex part 20 at the part where freezing is slowest. For example, when the ice-making speed is always equal at any position on the ice level, the raised portion can also be arranged at any position on the bottom surface, but for example, on the side of the ice-making tray, if the cold air surrounds the outside of the ice-making tray more, the cooling is relatively low. To proceed quickly, at least one raised portion 20 needs to be provided on the inner side of the bottom surface of the ice tray 11 . The number and arrangement of the raised portions 20 are not particularly limited. In addition, although the opening part 19 and the protrusion part 20 are described here as being provided in the bottom surface of the ice tray 11, they may be provided in the side surface of the ice tray 11.

The convex portion 20 has a volume required for collecting dissolved substances to such an extent that the transparency of the ice formed on the ice tray 11 is not affected. Although its volume varies depending on the ice making speed, it is about 60% of the volume if the ice making time is about 1 hour, about 10% if the ice making time is about 3 hours, and about 3.5 hours if the ice making time is 3.5 hours. Then about 5%. It is practical for clear ice generation for foodstuffs in domestic refrigerators when the ice is made for about 1 hour to 3 hours. That is, if it is generated in a short time, the transparency is not sufficient, and when the time is too long, that is, when the ice generation rate is 2mm/hour for a long time, although more transparent ice can be obtained, the transparent ice that is generated needs to be used in the refrigerator. Insufficient quantity. This is also related to the amount of ice-making water, so it is best to use at least 3.5 hours as the ice-making cycle to generate transparent ice.

When the ice making is finished, the ice is removed. The time of ice separation is a state in which the ice separated from the ice tray 11 is completely frozen and falls to the storage bin 21 without water falling from the ice tray 11 and the raised portion 20 . If this state is possible, an unfrozen portion may remain on the ice tray 11 or the raised portion 20 .

The timing of shifting to ice separation is the timing when the temperature sensor 18 reaches a certain temperature at which the end of ice making can be confirmed in advance. However, this time may also be after a predetermined time calculated based on any operation in the refrigerator has elapsed when the temperature sensor 18 detects a preset temperature after water supply starts or after water supply, or by using both temperature and time in combination. . According to this timing detection, the ice-off twist applied to the ice making tray 11 by the driving means 15 and the stopper member 17 breaks the ice near the opening portion 19 as explained above.

At this time, the surroundings of the convex portion 20 must reach a predetermined temperature or lower. The predetermined temperature is preferably an upper limit value of a temperature range in which the peripheral portion of the ice of the raised portion 20 is prevented from melting and the ice of the raised portion 20 leaves the ice in the state of ice connected to the ice tray 111 .

In addition, the ice in the ice tray 11 needs to have a specification not to be broken outside the opening 19 but to be broken near the opening 19 and then fall quickly. First, the side surface of the ice tray 11 has a sufficient inclination angle from the bottom upward to the outside. Specifically, it is preferable that at least one of the side surfaces has an inclination angle of at least 10° with respect to the vertical direction, for example, by the driving device 15 and the stopper member 17, after the ice tray 11 performs the ice-detaching action, the surface near the portion with the highest residual ice property. or an angle of inclination above it. In addition, in order to make the ice separated from the ice tray fall smoothly, it is better not only to increase the inclination angle of the side of the ice tray, but also to minimize the friction between the ice inside the side of the tray and the ice tray, by sufficiently Forming of metal dies that have undergone die grinding. Specifically, it is beneficial to de-icing when grinding the mold to the degree of clear plastic products (#2000). And in the case of obtaining the structure of this ice tray, the ice separation torque is basically the same as the torque when the ice is separated from the ice tray that is generally used for automatic ice making now, so it is not necessary to use the ice tray in the prior art example. When higher torque is required as in the illustrated ice tray, new parts are added, and the size does not change, and the manufacturing cost does not increase.

Moreover, by making the upper part of the ice tray 11 wider as mentioned above, the cooling rate can be accelerated compared with the effect of the lower part of the ice tray.

When such an ice tray is reversed to twist the ice away, it is necessary to adopt a specification that the ice formed on the inner surface side of the convex portion 20 does not fall. First, the side surface of the raised portion 20 has a necessary minimum inclination angle (for example, an angle of 10° or less) from the bottom upward to the outside. The minimum necessary inclination angle means that although the ice cannot be taken out by the ice-leaving action, when the member composed of the ice tray 11, the opening portion 19, and the raised portion 20 is formed, it can be reliably pulled out from the mold. within such an angle range. In this way, the angle of the side surface on the inner side of the ice tray is larger than the angle of the side surface on the inner side of the raised portion, in other words, the angle of the side surface on the side of the raised portion is made smaller than the angle of the side surface on the side of the ice tray. The difference in the angle can be achieved by changing the angle of the mold, or by changing the grinding method of the part corresponding to the side surface of the mold.

In addition, the inside of the raised portion 20 is not ground. As described above, when it is desired to form a large slope on the side surface to make the supply water flow into the convex portion 20 more easily, the ice can be more reliably retained in the convex portion 20 by further roughening the surface.

In addition, the height of the raised portion 20 is an arbitrary height at which the ice cannot be pulled out when it is separated from the ice, and it is necessary to limit it to the rotation locus specified by the position of the widest part of the ice tray 11 and the position of the support shaft 14, including the thickness of the member. The height within the radius. Although the height of the raised portion 20 can also be longer than the maximum width of the ice making tray 11, and the radius of the rotation trajectory is set according to the height of the raised portion 20, in this case, the width of the bracket 16 must be changed to make the ice making chamber 5 The structure of the ice tray 11, the opening 19, and the structure of the raised portion 20 is changed. For this reason, as a cheaper manufacturing method, it is preferable to limit the height of the opening 19 to within The height within the radius range of the rotation locus specified by the widest part of the ice tray 11.

In addition, as mentioned above, the number of objects of the convex part 20 is not limited. For this reason, although it can also be provided at a position closer to the support shaft 14 or a position farther away, the distance from the bottom surface of the ice tray 11 to the rotation track is of course long when approaching the support shaft 14 at this time. Therefore, the convex portion 20 at a position close to the support shaft 14 may be longer than the convex portion 20 at a position farther from the support shaft 14 . In this way, when ice is made not only on the top of the ice making tray 11 but also gradually from the side, water containing a larger amount of dissolved substances that tends to form cloudy portions can be enclosed and frozen to the raised portion 20 .

After the deicing operation, water is supplied to proceed to the ice making process of the next cycle, but at this time, the ice remaining in the raised portion 20 is gradually melted by the supplied water. Melting not only occurs on the ice remaining on the raised portion 20, but also water gradually enters from the side to make it melt. The water stored in the ice tray 11 is mixed while melting. At this time, if the surface of the water stored in the ice tray 11 is not completely frozen, the gas component will be released from the water surface, so that the cloudy component will not increase significantly in the next ice making process.

In order to make the transparency of the ice stored in the storage bin 21 clear, the interior of the storage bin 21 may be colored to make the transparency of the ice clear, or blue LEDs may be irradiated to provide an environment such as color matching and brightness that can effectively display transparency.

In addition, at the beginning of the operation of the refrigerator and the first ice making after the ice tray is cleaned, that is, when there is no water or ice in the raised portion 20 and other occasions, in order to always supply ice of the same size, the The latter reduces the amount of water supplied by an amount corresponding to the volume of the raised portion 20 .

In the above description, the method of cooling from above the ice tray 11 has been described, but the configuration with heating means such as a heater near the raised portion will be described below. In this way, the substance that forms the cloudy part can be reliably driven to the raised part, and transparent ice can be produced in the ice tray, and the ice in the raised part 20 can float to the storage water in the ice tray 11 when the water supply after leaving the ice can be shortened. time before. The following description will be made based on FIGS. 6 to 13 . In the following description, the description about the part equivalent to the previous description is omitted.

Figure 6 is an explanatory view of the ice-making device of the present invention, (a) is a side sectional view, (b) is a top view, Figures 7 and 8 are cross-sectional views of the ice-making tray of the present invention, and Figure 9 is viewed from above The ice-making tray of the present invention and the perspective view of the heater arranged under the ice-making tray, Figure 10 is a flow chart of the ice-making process of the present invention, Figure 11 is a timing diagram of the ice-making process of the present invention, Figures 12 and 13 It is an example of the ice making experiment results of the present invention.

The heater 22 obtained by covering the heating element such as nichrome wire or the like with silicone rubber or the like is arranged on the lower side of the ice tray 11, as shown in FIG. The raised portions 20 provided in the ice area are provided at intervals. The heater 22 needs to be formed of a flexible member such as a silicone material or the like that has cold resistance that does not crack even at low temperatures and that can follow the twisting of the ice tray when leaving the ice. In addition, in order to install the heater as compactly as possible, as shown in FIG. 9 , it needs to be as short as the outer periphery of the side surface of the ice tray 11 at the maximum as shown in FIG. However, the ice making compartment 5 of this heater is not sufficiently cooled, and even in an empty state without water supply, all materials of the main body 1 of the freezer including the ice making tray 11 will not be deformed and malfunctioned, and it is formed as a double insulation etc., also have sufficient reliability in terms of safety. For the heating body of the heater installed in the ice tray, since people may touch the ice tray or be soaked by water, the metal surface and other heating parts are not exposed, and it is double-layer insulation, which has safety.

When the heater 22 is brought into close contact with the bottom surface of the ice tray 11, the freezing speed of this part may be slowed down similarly to the raised part 20, and a cloudy part may be formed. However, if it is separated excessively, freezing may also proceed from the bottom of ice tray 11, opening 19 may be blocked, and ice with many cloudy parts may be formed in ice tray 11. In order to avoid this problem, it is necessary to employ a heater installation structure on the bottom surface of the ice tray 11 in which the amount of heat supplied is less than that supplied to the raised portion 20 . For example, as shown in FIGS. 7 and 8, a structure in which the heater 22 is in close contact with the side of the raised portion 20 and slightly separated from the bottom surface of the ice tray 11 as the first ice forming part (for example, about 2 to 5 mm) can be adopted. .

In addition, in order to obtain the installation position of the heater 22 as a heating unit more easily and reliably, when it is desired to install the heater 22 in contact with the bottom surface of the ice tray 11, it can also be intentionally placed toward the bottom surface of the ice tray 11. On the contrary, the heater 22 is formed so as to cover the heating element inside. In addition, it is also possible to increase the thickness of the bottom surface of the ice tray 11 at the portion in contact with the heater 22 , or provide a heat insulating material between the ice tray 11 and the heater 22 .

As mentioned above, when there are two raised parts 20, they are sandwiched between them, but they can also be provided on the bottom of the raised part 20 in order to clearly maintain the distance from the bottom of the ice tray 11 (Fig. 8(a) ). In addition, the heater 22 can also be easily installed to cover the entirety of the convex portion 20 ( FIG. 8( b )). In short, any location may be used as long as heat can be efficiently supplied to the location most desired to delay freezing.

Obviously, the heater 22 also needs to be arranged in the rotation track when leaving the ice. As a method of installing the heater 22, there is not only a method of sandwiching a plurality of protrusions 20, but also when there is only one protrusion 20, a baffle may be provided in parallel with the protrusions 20, sandwiched in between. In addition, the raised portion 20 and the heater 22 may be covered with a material having high thermal conductivity such as an aluminum tape, and the raised portion 20 may be integrally provided to transfer heat efficiently to the raised portion 20 . In addition, a hook fixing structure capable of preventing the heater 22 from falling may be provided. In addition, this hook fixing structure may be formed integrally with the installation cover of the temperature sensor 18 .

In the above description, the case where there is only one heater 22 has been described, but in situations where the amount of cooling from the top of the ice making tray 11 is quite different for each ice making area, for example, the contact mode of the cold air is greatly different, a heater 22 can also be installed. Multiple heaters 22, providing different inputs. In addition, although the heater 22 is described as being in close contact with the convex portion 20, it may not be in close contact with the convex portion 20 as long as the same heat transfer effect as above can be obtained, and may be at a distanced position. In addition, if the periphery of the heater is covered with a heat insulating material, and most of the heat generated by the heating unit is transferred only to the second ice generating portion as the raised portion 20, efficient heating can be performed.

Although the heater 22 provided as above can also be continuously energized, as shown in Figures 10 and 11, after a certain period of energization after water supply, and then power off, the energy used can be reduced, even if the ice-making speed is increased, it can also obtain Highly transparent ice.

The ice making operation including the control operation of the heater 22 will be described according to the control method shown in FIGS. 10 and 11 . In step 1, as shown in FIG. 11 , the solenoid valve for water supply is energized, and the water supply pump is operated for a certain period of time to supply a predetermined amount of water to ice tray 11 . Immediately after the water supply in step 1 is completed, power supply to the heater 22 is started in step 22 . In this way, the remaining ice provided in the raised portion in the previous cycle is melted by the supply and heating of water, and impurities and air bubbles diffuse to the entire ice tray, and some of them are released from the open surface. In step 3, before the output of the temperature sensor 18 reaches a predetermined temperature Ta set based on a certain value related to the freezing of water in the ice tray 11 obtained by experiments or the like, for example, a temperature lower than -1 degree, Perform a certain amount of power-up. After reaching the predetermined temperature Ta, the heater is turned off in step 4. At this time, transparent ice is formed on the ice tray 11, but the unfrozen portion of the water in the raised portion 20 remains. The heating is stopped by turning off the power of the heater 22, so that the unfrozen part in the raised portion 20 is rapidly frozen. This is because no heat is supplied to the raised portion 20, and it is exposed to cold air forming an environment of the ice making compartment 5 of the refrigerator.

In step 5, when it is judged that the output of the temperature sensor 18 reaches the predetermined temperature Tb set according to a certain value related to the freezing of water in the convex portion 20 obtained through experiments or the like, the process proceeds to step 6. De-icing process. In step 6, the driving device 15 for detaching ice is rotated forward, and the ice tray 11 is reversed, and until the time tr elapses in step 7, the operation in the direction of forward rotation is continued. At this time, one end of the ice-making tray 11 is pushed to the stopper member 17, the tray is twisted, and the ice-making tray 11 is separated from the ice in the raised portion 20 by the stress applied to the opening portion 19 by the twisting, and the ice is made. The ice of the tray 11 falls to the storage bin 21 . In step 8, the driving device 15 reverses to make the ice tray 11 rotate towards the original position. In step 9, the action in the reverse direction is continued until the time tr elapses. In step 10, the ice tray 11 returns to the original position. position, the drive unit 15 stops. While this deicing is performed, the ice in the raised portion 20 remains. In step 11, it is detected whether the storage bin 21 is full of ice, and the process of water supply, ice making, and ice removal is a cycle of ice making, and before it is full of ice, it returns to step 1, and the ice making cycle is repeated.

FIG. 12 shows an example of experimental results based on the above control. The horizontal axis is the ice making time, and the vertical axis is the transparency of ice. For example, when it is desired to obtain ice with a transparency of 95% or above, the optimum ice making time is about 2.5 to 3.5 hours. If the ice-making time is earlier than this range, it means that the amount of energization of the heater 22 is small or the timing of turning off the power of the heater 22 is too early. In addition, when the ice-making time is later than this region, it is when the heater 22 is supplied with a large amount of electricity or when the heater 22 is turned off too late. In addition, when the amount of water supplied is changed, the ice making time for obtaining the same transparency is advanced for a smaller amount of water, as shown by a dotted line; The ice making time to obtain the same transparency is delayed. In the case where it is desired to be filled with ice earlier even though the transparency is slightly lower, the temperature Ta can be set higher, or the current flow can be lowered. When a large amount of transparent ice is not required, the set temperature Ta can be set lower, or the electric current can be increased, and the water volume can be increased.

The capacity of the heater 22 is determined according to the cooling capacity. If the cooling capacity increases, the capacity of the heater 22 also needs to be selected to increase proportionally. However, if the ice storage bin 21 is installed in the ice making room 5 at this time, it is necessary to prevent the ice stored in the storage bin 21 from being melted by the radiant heat from the heater 22 . Figure 13 is the result of placing a substance with a certain heat capacity in the refrigerator and observing the temperature change at the center. Before and after the start of energization of the heater 22, there is no large change in temperature, and there is no significant increase in temperature while the heater 22 is energized. Therefore, in the structure of the ice making chamber 5 of a general household refrigerator, the structure which does not generate|occur|produce thermal influence substantially on the ice in the storage bin 21 should be considered.

In addition, although the energization timing of the heater 22 is set as immediately after the water supply is completed, as long as the energization start time is during the period when the water flowing into the raised portion 20 has not started to freeze, it can be any time, for example, Simultaneously with the start of water supply, or when the temperature detected by the temperature sensor 18 reaches a predetermined temperature, or when a predetermined time elapses from these times, or the like.

The same is true about the power-off timing of the heater 22 that stops heating the convex portion 20, even when the temperature detected by the temperature sensor 18 reaches a predetermined temperature, as long as the water supplied to the ice tray 11 is substantially frozen, The moment at which the power can be turned off in the state where the protruding portion 20 remains with many unfrozen parts can be any time, for example, after a predetermined time has elapsed from the time when the heater 22 is turned on or from the heater 22. When the temperature detected by the temperature sensor 18 reaches a predetermined temperature after a predetermined time elapses from the energization start time.

In addition, although the energization amount of the heater 22 in the ice making process is assumed to be constant, it may be changed arbitrarily. For example, the amount of energization of the heater 22 is increased or decreased according to the increase or decrease of the cooling capacity due to the operation and stop of the compressor of the refrigerator, so that the speed of ice making can be increased without affecting the transparency, and at the same time, the power consumption during ice making can be reduced. . In addition, by reducing the power supply or power off during defrosting without blowing cold air to the ice tray, the ice production speed can be increased without affecting the transparency, and the power consumption during ice production can be reduced.

Next, a method of cleaning the ice tray will be described. The refrigerator has a control board not shown in the figure to store the number of times of making ice. Then, when a predetermined number of times is reached, the user is advised to clean by means of, for example, flashing an LED on an operation panel not shown in the figure. The user activates the cleaning mode by pressing, for example, a cleaning switch provided on an operation panel not shown in the figure. There is provided a mechanism that starts the energization of the heater 22 to melt the ice in the raised portion 20, and thereafter, reverses the ice tray to drain water. In this way, even if the mineral components contained in the supply water remain on the convex portion 20, they can be removed, so that transparent ice can be obtained cleanly at all times. The drainage mechanism only needs to store the drainage flowing out of the convex portion 20 during the normal rotation of the ice tray in the reverse direction. The mechanism is simple and does not increase the size. In addition, water may be supplied to promote melting. It can also perform multiple water supply and drainage actions to further improve the cleaning effect.

In addition, as another cleaning method, when the cleaning mode is activated, water can be supplied to the ice tray 11 to make ice, and after the ice making is completed, the heater 22 can be energized for the time that only the ice around the raised portion 20 can be melted. After that, the ice making tray is reversed, and the ice formed in the ice making tray 11 and the raised portion 20 is discharged in a connected state, thereby removing the mineral components remaining in the raised portion 20 .

In addition, the freezer main body 1 is provided with a switch that allows the user to select normal ice-making and transparent ice-making. When the normal ice-making is selected, the operation of the heater 22 stops and can be switched to the ice-making operation at a preset time. Therefore, the amount of power consumption can be saved according to the user's wishes.

The refrigerator of the present invention is an ice-making device equipped with a single-layer ice-making tray that is divided into a plurality of ice-making areas to store water and make ice, and is equipped with multiple The ice-making tray of the ice-generating part separates the transparent part of the ice from the cloudy part, and can provide transparent ice to the user. Thus, transparent ice can be obtained substantially without increasing energy with the same configuration and size as that of the ice making device provided in the prior art refrigerator. A first ice generating part having a hole provided in a part of the ice making tray for storing water and making ice and a second ice generating part having an opening of the same shape as the hole provided in the first ice generating part are manufactured integrally. The ice tray of the layer structure is molded by injecting molten resin into a cavity between two metal molds, so that a structure in which the ice tray and the raised portion are integrally formed can be produced in a short time with a simple manufacturing device. And make the inner surface of the tray of the first ice generating part of the ice tray smoother than the inner surface of the tray of the second ice generating part, and make the surface of the wall surface corresponding to the inner side of the metal mold corresponding to the ice making tray above smooth. , without grinding the wall surface corresponding to the inner side of the raised part below, and use it as it is.

The inner side of the ice tray and the inner side of the raised part of the present invention are inclined from the lower side to the upper side to the outer side, and the inclination angle of the tray side as the first ice forming part of the ice making tray from the lower side to the upper side is relatively vertical. The direction is formed at an angle larger than the inclination angle from the lower side to the upper side of the tray side of the second ice forming part as the convex part, so that the ice is easily separated from the ice making tray, and the ice in the convex part cannot be easily separated. In this case, in the first ice forming part, although the side surface of the ice tray can be inclined at a large angle from the lower side to the upper side to the outside to make it easier to separate the ice, but since the twist is applied, it is determined according to the twist angle. Therefore, as long as the ice cubes are easy to pull out from the upper ice-making tray and not easy to pull out from the raised part below.

With respect to the heating unit which is close to the second ice-generating portion which is the raised portion of the present invention, it is preferable that the cooling unit cools at least the surface opposite to the heating unit. The heating unit is preferably located far away from the first ice generating section.

Next, a method of producing large transparent ice (larger in size than normal ice obtained by normal ice making) required for drinking whiskey with ice cubes or water added is described below. In this embodiment, the purpose is to change the amount of water supplied to the ice tray 11 and to obtain ice of a size that satisfies the user. Fig. 14 is a diagram illustrating the flow of the ice making process in the refrigerator according to Embodiment 1 of the present invention, and Fig. 15 is a time chart of the ice making process in the case where the amount of water supplied can be changed.

Next, 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 this embodiment, for example, an ice-making mode switch button that can select transparent ice is provided on an operation panel not shown in the figure, which is provided on the front or side of the refrigerator main body or on the inner wall of the refrigerator, and the user switches the ice-making mode switch button To transparent ice, or when a transparent ice selection button is set instead of a switching button, press the transparent ice-making button, etc., and determine whether the transparent ice-making mode is selected by step 31, and adjust the water supply.

When the transparent ice mode is selected in step 31, in step 32, the control device not shown in the figure drives the water supply pump 23 according to the water supply pump driving time t1 to supply water to the ice tray 11. 31 is preset in the control device in response to a transparent ice production command. When the transparent ice-making mode is not selected, in step 33, the water supply pump 23 is driven to supply water to the ice tray 11 according to the water supply pump driving time t2, which is preset in a control device not shown in the figure. At this time, the driving time t1 of the pump is longer than the driving time t2, and can be set to about t1/t2=1.1 to 3, for example, t1=10 seconds, t2=7 seconds, or the like. That is, the ice-making mode is judged 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 the water supply to the ice tray 11 has been performed in step 33 , the process proceeds directly to step 37 . At this time, the ice remaining on the raised portion 20 of the ice tray 11 in the previous cycle is melted by water supply and heating, impurities and air bubbles diffuse to the entire ice tray, and a part is released from the open surface. In step 32, when water is supplied to ice tray 11, energization to heater 22 is started in step 34 immediately after the water supply is completed. At this time, the ice remaining on the raised portion 20 of the ice tray in the previous cycle is melted by the supply of water and the heating of the heater 22 this time. 11's open side let out.

In step 35, before the output of the temperature sensor 18 reaches a predetermined temperature Ta (for example, a temperature lower than -1 degree) set according to a certain value related to the freezing of water in the ice tray 11 obtained by experiments, etc. A certain amount of electrification. When the predetermined temperature Ta is reached, the heater 22 is turned off in step 36 . At this time, transparent ice is formed in the first ice forming part of the ice tray 11, but the unfrozen part of the water in the raised part 20 remains. By turning off the heater 22 and stopping the heating, the inside of the second ice forming part in the convex part 20 is rapidly frozen. This is because -18 degree cold air is supplied to the freezer which forms the refrigerator.

In step 37, when it is judged that the output of the temperature sensor 18 reaches the predetermined temperature Tb set according to a certain value related to the freezing of water in the raised portion 20 obtained through experiments, etc., transfer to the deicing from step 38. process. Here, the set value Tb in step 37 is the same value (for example -6 degrees) that is not affected by the ice making mode, but it can also be -10 degrees when the transparent ice making mode is selected, and -10 degrees when the normal ice making mode is selected. 6 degrees, change the set value Tb according to the ice making mode. In step 38, the driving device 15 is rotated forward, and the ice tray 11 is reversed, and until the time tr elapses in step 39, the operation in the direction of forward rotation is continued.

At this time, one end of the ice-making tray 11 is pushed to the stopper member 17, the tray is twisted, and the ice-making tray 11 is separated from the ice in the raised portion 20 by the stress applied to the opening portion 19 by the twisting, and the ice is made. The ice of the tray 11 falls to the storage bin 21 . In step 40, the driving device 15 reverses to make the ice tray 11 rotate towards the original position. In step 41, the action in the reverse direction is continued until the time tr elapses. In step 42, the ice tray 11 returns to the original position. position, the drive unit 15 stops. While this deicing is performed, the ice in the raised portion 20 remains. In step 43, it is detected whether the storage bin 21 is full of ice, and the water supply, ice making, and ice removal steps are performed as one cycle of ice making, and before it is full of ice, it returns to step 1, and the ice making cycle is repeated.

In addition, when generating transparent ice, such an increase in the amount of water supplied can generate large ice in the transparent ice generating unit, which is related to the improvement of the appearance of the ice. It is also effective in addition to the transparent ice-making method performed by the ice-making tray of the second ice-generating part.

As described above, the present invention can provide an ice making device which can avoid the formation of abnormally shaped ice without greatly changing the components of the ice making chamber of a normal refrigerator equipped with an automatic ice making device. , the ice tray can be manufactured cheaply by an easy manufacturing method, does not adversely affect the ice in the storage bin, and has excellent cleaning properties. Therefore, a practical refrigerator can be obtained. In addition, since there is a variable water supply unit that can change the water supply time (pump driving time) to the ice tray, by making the water supply time longer than usual and increasing the water supply to the ice tray, it is possible to create a beautiful Large chunks of clear ice.

In addition, it has an ice-making tray 11 and a control device as a water supply adjustment unit; the ice-making tray 11 stores water supplied in a plurality of divided ice-making areas, accepts cold air to make ice, and can apply mechanical force to make the generated water Ice leaves; the control device can change the amount of water supplied to the above-mentioned ice-making tray; when receiving an instruction to make transparent ice, the amount of water supplied to the ice-making tray 11 is increased, so compared with the usual ice making, The amount of water supplied to the ice tray 11 is increased, large pieces of transparent ice suitable for adding ice cubes or drinking whiskey with water can be obtained, and tasty transparent ice with a good appearance can be obtained.

As explained above, this invention can provide the apparatus and method which can manufacture transparent ice easily and with little energy. In addition, the present invention can provide a practical refrigerator in which delicious-looking transparent ice can be obtained without reducing the space of the food storage part.

Claims (24)

1. an ice maker is characterized in that: comprise ice-making disc, the 1st ice generating portion, the 2nd ice generating portion, reach the ice that is generated by the 2nd ice generating portion; A plurality of ice makings district that this ice-making disc is stored into the water of supplying with division respectively accepts cold air and carries out ice making, and applies mechanical force the ice of generation is left; The 1st ice generating portion is located at the ice making district that marks off in above-mentioned ice-making disc, accept cold air and promote ice making; The 2nd ice generating portion is wholely set with above-mentioned the 1st ice generating portion, also is connected with the water that above-mentioned the 1st ice generating portion is communicated with also above-mentioned supply via opening portion, ices generating portion and compares reduction and accept the influence of cold air and make ice making slack-off with the above-mentioned the 1st; Should conjointly form by above-mentioned opening portion and the ice that generates by above-mentioned the 1st ice generating portion by the ice that above-mentioned the 2nd ice generating portion generates; Above-mentioned opening portion forms can accept the size and dimension that above-mentioned mechanical force is cut off near the ice of above-mentioned opening portion.

2. an ice maker is characterized in that: comprise ice-making disc, the 1st ice generating portion, reach the 2nd ice generating portion; A plurality of ice makings district that this ice-making disc is stored into the water of supplying with division respectively accepts cold air and carries out ice making, and can apply twisting resistance the ice of generation is left; The 1st ice generating portion is located at the ice making district that marks off in above-mentioned ice-making disc, accept cold air and promote ice making; The 2nd ice generating portion is located at above-mentioned ice making district, also be connected with the water that above-mentioned the 1st ice generating portion is communicated with also above-mentioned supply via opening portion, compare to reduce with above-mentioned the 1st ice generating portion and accept the influence of cold air and to make ice making slack-off, and form make generation ice than the more difficult size and dimension that separates from above-mentioned ice-making disc of above-mentioned the 1st ice generating portion; Above-mentioned ice-making disc is accepted twisting resistance, and near the ice that is generated by above-mentioned the 1st ice generating portion that cuts off above-mentioned opening portion leaves.

3. an ice maker is characterized in that: comprise ice-making disc, the 1st ice generating portion, the 2nd ice generating portion, reach the ice that is generated by above-mentioned the 2nd ice generating portion; A plurality of ice makings district that this ice-making disc is stored into the water of supplying with division respectively accepts cold air and carries out ice making, and the ice of generation is left; The 1st ice generating portion is located at the ice making district that marks off in above-mentioned ice-making disc, accept cold air and promote ice making; The 2nd ice generating portion is located at the below in above-mentioned ice making district, also is connected with the water that above-mentioned the 1st ice generating portion is communicated with also above-mentioned supply via opening portion, compares to reduce with above-mentioned the 1st ice generating portion and accepts the influence of cold air and make ice making slack-off; Should conjointly form by above-mentioned opening portion and the ice that generates by above-mentioned the 1st ice generating portion by the ice that above-mentioned the 2nd ice generating portion generates; Above-mentioned the 1st ice generating portion is open at the open surface of above-mentioned ice-making disc, and above-mentioned the 2nd ice generating portion can be open towards the opening portion expansion ground that is communicated with above-mentioned the 1st ice generating portion.

4. an ice maker is characterized in that: comprise ice-making disc, the 1st ice generating portion, reach the 2nd ice generating portion; A plurality of ice makings district that this ice-making disc is stored into the water of supplying with division respectively accepts cold air and carries out ice making, and applies twisting resistance the ice of generation is left; The 1st ice generating portion is located at the ice making district that marks off in above-mentioned ice-making disc, accept cold air and promote ice making; The 2nd ice generating portion is located at the below in above-mentioned ice making district, also be connected with the water that above-mentioned the 1st ice generating portion is communicated with also above-mentioned supply via opening portion, compare to reduce with above-mentioned the 1st ice generating portion and accept the influence of cold air and to make ice making slack-off, and form make generation ice than the more difficult size and dimension that separates from above-mentioned ice-making disc of above-mentioned the 1st ice generating portion; The relative vertical direction in the angle of inclination from lower face side towards upper surface side of dish side of above-mentioned the 1st ice generating portion form than from the lower face side of the dish side of above-mentioned the 2nd ice generating portion towards the big angle in the angle of inclination of upper surface side.

5. an ice maker is characterized in that: comprise ice-making disc, the 1st ice generating portion, reach the 2nd ice generating portion; A plurality of ice makings district that this ice-making disc is stored into the water of supplying with division respectively accepts cold air and carries out ice making, and the ice of generation is left; The 1st ice generating portion is located at the ice making district that marks off in above-mentioned ice-making disc, accept cold air and promote ice making; The 2nd ice generating portion also is connected with the water that above-mentioned the 1st ice generating portion is communicated with also above-mentioned supply via the opening portion of the below of being located at above-mentioned ice making district, compares to reduce with above-mentioned the 1st ice generating portion and accepts the influence of cold air and make ice making slack-off; The shape of above-mentioned the 2nd ice generating portion for protruding towards the below from above-mentioned the 1st ice generating portion that is formed at above-mentioned ice making district.

6. an ice maker is characterized in that: comprise ice-making disc, the 1st ice generating portion, reach the 2nd ice generating portion; A plurality of ice makings district that this ice-making disc is stored into the water of supplying with division respectively accepts cold air and carries out ice making, and applies twisting resistance the ice of generation is left; The 1st ice generating portion is located at the ice making district that marks off in above-mentioned ice-making disc, accept cold air and promote ice making; The 2nd ice generating portion is located at above-mentioned ice making district, also is connected with the water that above-mentioned the 1st ice generating portion is communicated with also above-mentioned supply via opening portion, compares to reduce with above-mentioned the 1st ice generating portion and accepts the influence of cold air and make ice making slack-off; Above-mentioned the 2nd ice generating portion volume be above-mentioned the 1st ice generating portion volume 10～20%.

7. an ice maker is characterized in that: comprise ice-making disc, the 1st ice generating portion, reach the 2nd ice generating portion; A plurality of ice makings district that this ice-making disc is stored into the water of supplying with division respectively accepts cold air and carries out ice making, and applies mechanical force the ice of generation is left; The 1st ice generating portion is located at the ice making district that marks off in above-mentioned ice-making disc, accept cold air and promote ice making; The 2nd ice generating portion is located at above-mentioned ice making district, also is connected with the water that above-mentioned the 1st ice generating portion is communicated with also above-mentioned supply via opening portion, compares to reduce with above-mentioned the 1st ice generating portion and accepts the influence of cold air and make ice making slack-off; The inner surface of above-mentioned the 1st ice generating portion is more smooth than the inner surface of above-mentioned the 2nd ice generating portion, so that the ice that generates in above-mentioned the 1st ice generating portion is easy to leave.

8. according to any one described ice maker in the claim 1～7, it is characterized in that: above-mentioned the 2nd ice generating portion is elongated flute profile, and wide 5mm or its following opening with one side of being located at above-mentioned the 1st ice generating portion, cut off with the ice that generates in above-mentioned the 1st ice generating portion so that be easy to.

9. an ice maker is characterized in that: comprise ice-making disc, the 1st ice generating portion, reach the 2nd ice generating portion; A plurality of ice makings district that this ice-making disc is stored into the water of supplying with division respectively accepts cold air and carries out ice making, and the ice of generation can be left; The 1st ice generating portion is located at the ice making district that marks off in above-mentioned ice-making disc, accept cold air and promote ice making; The 2nd ice generating portion is located at above-mentioned ice making district, also is connected with the water that above-mentioned the 1st ice generating portion is communicated with also above-mentioned supply via opening portion, in order to ice generating portion and to compare and make ice making slack-off and heated by heating unit with the above-mentioned the 1st; Above-mentioned heating unit stops heating according to the temperature of above-mentioned the 1st ice generating portion.

10. an ice maker is characterized in that: comprise ice-making disc, the 1st ice generating portion, reach the 2nd ice generating portion; A plurality of ice makings district that this ice-making disc is stored into the water of supplying with division respectively accepts cold air and carries out ice making, and the ice of generation can be left; The 1st ice generating portion is located at the ice making district that marks off in above-mentioned ice-making disc, accept cold air and promote ice making; The 2nd ice generating portion is located at above-mentioned ice making district, also is connected with the water that above-mentioned the 1st ice generating portion is communicated with also above-mentioned supply via opening portion, compares with above-mentioned the 1st ice generating portion ice making is heated by heating unit slack-offly; Above-mentioned the 2nd ice generating portion forms the shape of protruding towards the below from above-mentioned the 1st ice generating portion that is formed at above-mentioned ice-making disc top, and above-mentioned heating unit is located at the one side at least of above-mentioned the 2nd ice generating portion.

11. according to claim 9 or 10 described ice makers, it is characterized in that: above-mentioned heating unit carries out double hyer insulation to heater body.

12. according to any one described ice maker in the claim 9～11, it is characterized in that: the heater body of above-mentioned heating unit is located at from above-mentioned the 1st ice generating portion and is left preliminary dimension or the position more than it.

13. according to any one described ice maker in the claim 1～12, it is characterized in that: the above-mentioned opening portion of above-mentioned the 2nd ice generating portion is made and inner equal area or wideer area, so that inner ice is inflatable.

14. according to any one described ice maker in the claim 1～13, it is characterized in that: the volume of above-mentioned the 1st ice generating portion of the volumetric ratio of above-mentioned the 2nd ice generating portion is little, and the radius of gyration of pressing above-mentioned ice-making disc is with interior size setting.

15. according to any one described ice maker in the claim 1～14, it is characterized in that: above-mentioned ice-making disc flow into 2 die cavities between metal pattern by the resin that makes fusion and forms.

16. ice maker according to claim 15 is characterized in that: the face of above-mentioned metal pattern of inner surface that forms the 1st ice generating portion of above-mentioned ice-making disc is the rank of carrying out reaching after the attrition process plastic product.

17. according to any one described ice maker in the claim 1～16, it is characterized in that: have the output regulon that can change to the output of above-mentioned ice-making disc, in the occasion of the fabrication order that receives transparency ice, increase output to above-mentioned ice-making disc.

18. a deep freezer, any one described ice-making disc in the configuration claim 1～17 in ice-making compartment, the cooled cold air of jetting from the top of this ice-making disc carries out ice making.

19. ice making method, comprise from the top winding-up cold air of the ice-making disc that is disposed at ice-making compartment, the step of the ice making of the 1st ice generating portion that promotes open ice-making disc upper surface and be provided with, to the below of being located at above-mentioned the 1st ice generating portion and the 2nd ice generating portion that is communicated with above-mentioned the 1st ice generating portion heats and make ice making ice the slow step of generating portion than the above-mentioned the 1st, according to making heating stop the step of back ice making, reach above-mentioned ice-making disc is applied twisting resistance at the above-mentioned the 1st generation state of icing the ice of generating portion, the step of the ice that is breaking at the ice of above-mentioned the 2nd ice generating portion and generates in above-mentioned the 1st ice generating portion.

20. ice making method according to claim 19, it is characterized in that: have after the 1st ice generating portion from above-mentioned ice-making disc is left ice and supply water, above-mentioned the 2nd ice generating portion is heated the step of back in the above-mentioned the 1st and the 2nd ice generating portion ice making, can change according to heated condition in above-mentioned the 2nd ice generating portion with above-mentioned ice making with from the time of 1 circulation of icing to above-mentioned ice-making disc.

21., it is characterized in that according to claim 19 or 20 described ice making methods: 3.5 hours with the interior ice making of carrying out being undertaken by above-mentioned ice-making disc and from ice 1 circulation.

22., it is characterized in that according to any one described ice making method in the claim 19～21: thus the driving time that has by changing supply-water pump changes from the output regulating step of supply flume to the output of above-mentioned ice-making disc.

23. ice making method according to claim 22 is characterized in that: above-mentioned output regulating step prolongs above-mentioned driving time in the occasion of the fabrication order that receives transparency ice, increases the output to above-mentioned ice-making disc.

24. an ice maker is characterized in that: have ice-making disc and output regulon; A plurality of ice makings district that this ice-making disc is stored into the water of supplying with division respectively accepts cold air and carries out ice making, and applies mechanical force the ice of generation is left; This output regulon can change the output of above-mentioned ice-making disc; Increase output in the occasion of the fabrication order that receives transparency ice to above-mentioned ice-making disc.

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