JP2005114198A - Ice tray and refrigerator with automatic ice making machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the following problems of an ice tray wherein ice is made in a state that a low boiling point substance is filled between an inner frame part and an outer frame part and is expanded such that a projecting face is formed toward an ice making small chamber side: the whole ice tray becomes large to contribute to a minus factor to miniaturization, the generated ice has concave drum shape, and it is difficult to form an ice cube when enlarging the ice making small chamber so as to enlarge the ice because volume of the ice making small chamber is small, and to provide an ice tray allowing easy separation of the ice, suitable for the miniaturization, allowing the small chamber of the ice tray to have a large volume when supplying water, and allowing generation of the ice cube of a prescribed shape. <P>SOLUTION: In this ice tray, a bottom wall of the ice making small chamber consists of an inside wall more deformable than an outside wall. A low coagulating point substance coming into a liquid state by temperature of ice making water, and coming into a coagulation state at a prescribed freezing temperature or below to cubically expand is filled between the inside wall and the outside wall, and the ice in time of ice making completion is detached from the ice tray by deformation of the inside wall accompanying the cubic expansion. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an ice tray made of synthetic resin in which a plurality of ice making chambers are formed, an ice tray used in an automatic ice maker, and a refrigerator with an automatic ice maker provided with the ice tray.

  In order to provide an ice tray that can be easily deiced without applying torsional force etc. to the ice tray, it is made of a material that has a low friction coefficient and can be easily deformed against pressure changes. A frame portion, an outer frame portion formed of a material that is not easily deformed, and a low-boiling substance filling portion that is formed between the inner frame portion and the outer frame portion and is filled with a low-boiling substance. There is a refrigerator with an automatic ice making device equipped with an ice tray (see, for example, Patent Document 1).

Since the temperature of the ice tray is equal to or higher than the boiling point of the low boiling point substance due to the temperature of water supplied from the water supply tank, the low boiling point substance is in a gaseous state and has a very large volume compared to the liquid state. Therefore, the inner frame part of the ice tray is in a state of expanding so as to form a convex surface toward the small chamber side containing water. Cooling from this state produces drum-shaped ice in the chamber, and changes to a liquid state when the boiling point of the low-boiling point substance falls below the boiling point of the low-boiling point substance. And a space is created between the ice generated in the chamber and the inner frame. By rotating the ice tray from this state by 180 °, the drum-shaped ice can naturally fall into the ice storage box below.
JP-A-7-305931

  In the invention of Patent Document 1, since the small chamber of the original ice tray supplied with water is in a state where the inner frame portion is expanded so as to form a convex surface toward the small chamber side, the volume of the small chamber is reduced. However, there is a problem that the size of ice generated is reduced. In order to enlarge the ice, the size of the small chamber becomes large, and the entire ice tray becomes large, which is a negative factor for downsizing. And the generated ice becomes a drum shape, and it is difficult to form ice cubes. Furthermore, the inner frame part of the ice tray must be dented toward the outer frame part when the boiling point of the low-boiling substance becomes lower than the boiling point. For this purpose, the material selection, shape and molding conditions of the inner frame part are required. Etc. may be severe.

  In view of the above points, the present invention aims to provide an ice tray that can be easily deiced, the volume of the small chamber of the ice tray is large when water is supplied, can generate ice cubes of a predetermined shape, and can be downsized. An ice-making tray suitable for the above and a refrigerator with an automatic ice-making machine equipped with the ice-making tray are provided.

  An ice tray according to a first aspect of the present invention is a synthetic resin molding in which a plurality of ice making chambers having an upper surface opening are formed, and the bottom wall of each ice making chamber is configured by an inner wall that is more easily deformed than an outer wall. In addition, a filling chamber is formed between the inner wall and the outer wall, which is filled with a low freezing point substance that becomes liquid by the temperature of the ice making water and becomes solidified below a predetermined freezing temperature. The ice upon completion of ice making is peeled off from the ice making tray by deformation of the inner wall accompanying the volume expansion.

  In the ice making tray of the second invention, a plurality of ice making chambers having upper surface openings are formed in each of the left and right rows along the longitudinal direction so as to make ice by freezing the injected ice making water in a freezing temperature atmosphere. It is a synthetic resin molded body that can be torsionally deformed, and the bottom wall of each ice making chamber is configured with an inner wall that is more easily deformed than the outer wall, and between the inner wall and the outer wall, A filling chamber filled with a low-freezing point substance that becomes liquid by the temperature of the ice-making water and becomes solidified below a predetermined freezing temperature and expands in volume is formed, and the ice making is completed by deformation of the inner wall accompanying the volume expansion The ice at the time is peeled off from the ice tray.

  The ice tray of the third invention is characterized in that the inner side wall is formed thinner than the outer side wall.

  The ice tray of the fourth invention is characterized in that the ice tray including the inner wall and the outer wall is integrally formed of polypropylene or polyethylene.

  The ice tray of the fifth invention is characterized in that the inner side wall has an uneven shape in the vertical direction.

  According to a sixth aspect of the present invention, ice-making water in a water supply container disposed in a refrigerator compartment in a refrigerator body is supplied to an ice tray of an automatic ice maker disposed in the freezer compartment, and the cold air cooled by the cooler is blown by the blower. In the refrigerator with an automatic ice maker supplied to the ice tray, the ice tray is a synthetic resin molded body in which a plurality of ice making chambers having upper surface openings are formed in left and right rows along the longitudinal direction, and each ice making chamber The bottom wall of the inner wall is configured by an inner wall that is more easily deformed than the outer wall, and is liquefied by the temperature of the ice making water between the inner wall and the outer wall and is in a solidified state below a predetermined freezing temperature. And a filling chamber filled with a low-freezing point substance that expands in volume, and is configured to peel ice from the ice tray upon completion of ice making due to deformation of the inner wall accompanying the volume expansion, In the solidified state, the motor device And performs de-ice operation by inverting the dishes allowed to drop ice into the ice container downward.

  In the first aspect of the invention, the ice making chamber is large when the water is supplied because the low-freezing point substance is deiced by shifting from a liquid state to a solidified state. Therefore, it is possible to provide an ice tray that can be easily deiced, and to provide an ice tray that is suitable for downsizing and that can generate ice having a predetermined shape because the volume of the small chamber of the ice tray is large when water is supplied.

  In addition to the effects of the first invention, the second invention can provide an ice tray that enables more reliable deicing by twisting deformation.

  In the third invention, in addition to the effects of the first or second invention, the deicing due to the deformation of the inner wall due to the volume expansion of the low freezing point substance is further improved.

  In addition to the above effects, the fourth invention can make an ice tray made of synthetic resin.

  In the fifth aspect of the present invention, when the concave and convex shape in the vertical direction is formed in a sawtooth shape, the inner wall is easily deformed and the deicing is improved. Further, if the concave and convex shape is made rectangular and the thickness of the downwardly projecting portion is reduced, the deicing is improved by the deformation of this portion.

  The sixth invention is a method in which the ice tray is twisted with a large force like the conventional one when applied to the ice tray of an automatic ice maker that reverses the ice tray by the motor device and drops the ice to the ice storage container below. Compared to the above, the ice removal is simpler, the driving force of the motor device is small, the structural design for twisting the ice tray can be simplified, and an automatic ice making machine that can be reduced in size and cost can be configured.

  The present invention makes it easy to deice by deforming a part of the ice tray in the direction of de-icing using the volume expansion caused by the liquid low-freezing point substance becoming solidified when ice is generated in the ice tray. Examples of the present invention are described below.

  Next, an embodiment of the present invention will be described. FIG. 1 is a front view of the refrigerator of the present invention, FIG. 2 is a front view of the refrigerator main body of the present invention, FIG. 3 is an explanatory view of the water supply state from the water supply container of the present invention to the ice making part, and FIG. FIG. 5 is a cross-sectional view of the ice tray, and FIG. 5 is a cross-sectional view of the ice tray for explaining the solidification state of the low freezing point substance at the end of ice making.

  The present invention will be described with reference to the drawings. Reference numeral 1 denotes a refrigerator, which has a configuration in which a plurality of storage chambers are formed by partitioning the inside of the main body 2 having a front opening, and the front surfaces of these storage chambers can be opened and closed by doors. The refrigerator body 2 has a heat insulating structure in which a foam heat insulating material is filled between an outer box (outer wall plate) and an inner box (inner wall plate). In the refrigerator main body 2, a refrigerator compartment 3, a vegetable compartment 4, an upper freezer compartment 5, an ice making compartment 7, and a lower freezer compartment 6 are partitioned from the top, and the refrigerator compartment 3 is provided at the bottom of the refrigerator compartment 3. 3 and a specific low temperature chamber 9 partitioned by a partition plate (partition wall) 8 is provided. The upper freezer compartment 5 can also be referred to as a switching chamber because it can be manually operated by the cold air amount adjusting device to be a refrigerator compartment.

  The front opening of the refrigerator compartment 3 is closed by a pivoting door 10 that is pivoted laterally by a hinge device on one side of the refrigerator body 2 and opened and closed. The front opening of the vegetable compartment 4 is closed by a drawer-type door 11 that is drawn forward together with a vegetable container 15 supported so as to be able to be drawn in the front-rear direction by left and right rails or roller devices provided in the vegetable compartment 4. The upper freezer compartment 5 and the lower freezer compartment 6, like the vegetable compartment 4, are drawer-type doors that are drawn forward together with containers 16 and 17 that are supported so that they can be drawn in the front-rear direction with respect to the left and right rails provided in the freezer compartment. Blocked at 12 and 13.

  In the ice making chamber 7, an automatic ice making machine 18 is provided at the upper part, and an ice storage container 19 is arranged at the lower part. As with the vegetable compartment 4, the ice storage container 19 is supported so that it can be pulled out in the front-rear direction with respect to the left and right rails provided on the left and right walls in the ice making chamber 7, and the drawer that opens and closes the front opening of the ice making chamber 7. It is a mechanism that is pulled forward together with the ceremony door 14. 20 is a water supply container for storing ice making water to be supplied to the automatic ice making machine 18. The water supply container 20 is disposed in a small chamber formed beside the specific low temperature chamber 9 in the refrigerating chamber 3, and the front door 10 of the refrigerating chamber 3 is opened to the front. It can be taken out freely. The ice making water is sucked up by the pump 21 from the water supply container 20 and supplied to the ice making tray 23 of the automatic ice making machine 18 through the water supply pipe 22.

  The refrigerator 1 condenses the refrigerant compressed by the compressor with a condenser, then depressurizes it through an expansion valve or a capillary tube, evaporates it with an evaporator (cooler), returns it to the compressor, and compresses it again with the compressor. It has a refrigeration system that repeats the same circulation. The air cooled by the evaporator (cooler) of this refrigeration system is circulated to the refrigerator compartment 3, the vegetable compartment 4, the upper freezer compartment 5, the lower freezer compartment 6, the ice making compartment 7, and the specific low temperature compartment 9 by a blower. Is cooled to a predetermined temperature. As one of the methods, two pairs of the evaporator (cooler) and the blower are provided, and one of them constitutes a refrigeration cold air supply device for cooling the refrigerator compartment 3, the vegetable compartment 4, and the specific low temperature compartment 9, One is to constitute a refrigeration cool air supply device that cools the upper freezer compartment 5, the lower freezer compartment 6, and the ice making chamber 7.

  The operation of the blower of the compressor and the refrigeration cool air supply device is ON / OFF controlled by temperature sensing of a freezer sensor that senses the temperature of the freezer compartment 6 directly or indirectly. Moreover, the temperature of the refrigerator compartment 3, the vegetable compartment 4, and the specific low temperature chamber 9 is maintained at a predetermined temperature by controlling the cold air circulated to the refrigerator compartment 3 by the blower of the refrigerator air supply device for the refrigerator by the cool air adjusting device. . By such control, the temperature of each room is about 3 to 5 ° C. in the refrigerator room 3, about 3 to 5 ° C. in the vegetable room 4, and about −18 ° C. to −20 ° C. in the upper freezer room 5 and the lower freezer room 6. It is. The specific low temperature chamber 9 is a chilled chamber of about 1 ° C. higher than 0 ° C., an ice greenhouse of about −1 ° C. to −2 ° C. lower than 0 ° C. and higher than the freezing temperature of food, Or a partial freezing chamber at about −4 ° C. to the extent that a thin ice layer is formed on the surface of the food. The ice making room 7 is at a low temperature like the freezing room 6 and is usually kept at about −18 ° C. to −20 ° C. by a cold air adjusting device.

  The water supply container 20 is removably accommodated in the refrigerator 1 and stores water to be supplied to the automatic ice making machine 18 that is an ice making part in the ice making chamber 7. The water supply container 20 includes a tank main body 30 having a rectangular shape and a rectangular upper surface opening, and a cover 33 that covers the upper surface opening of the tank main body 30. A water injection port 39 is formed by being recessed downward in the front portion, and the water injection port lid 40 can be opened and closed around the shaft 41 so as to open and close the water injection port 39. Reference numeral 42 denotes a connecting pipe connected to the suction port of the pump 21, and guides the water sucked up by the water suction pipe 43 drooping deeply from the cover 33 to the tank body 30 to the pump 21. A filter case 44 guides the water injected from the water injection port 39 into the tank body 30 through the activated carbon filter 45 attached to the bottom, and is detachably attached to the cover 33. In this state, the water inlet cover 40 can be opened to inject water from the water inlet 39 into the tank body 30.

  The ice making operation of the automatic ice making machine 7 includes an ice making process and a deicing process controlled by a control circuit unit provided in the refrigerator 1. When the start switch is turned on, the ice making process starts, and the control circuit unit energizes the pump 21 for a predetermined time, and supplies a predetermined amount of ice making water from the water supply container 20 to the ice making tray 23. After this water supply, when a predetermined time has passed by the timer means of the control circuit unit, or when the temperature sensor attached to the ice tray 23 detects the temperature at which the ice tray 23 has dropped, the control circuit unit After the ice making process is completed, the deicing process is started, the motor device 50 is started, the ice making tray 23 is reversed and twisted, the ice is dropped into the lower ice storage container 19, the ice making tray 23 is returned, and again An ice making operation cycle for supplying water to the ice tray 23 and entering the ice making process is performed.

  The ice storage state of the ice storage container 19 is detected by a detection lever that moves up and down to descend into the ice storage container 19 in association with the operation of starting the motor device 50 and inverting the ice tray 23. When the ice storage container 19 is full, the descent of the detection lever is hindered by ice when the ice storage is full. Therefore, the ice storage container 19 is detected by a change in motor current at that time, or operates when the detection lever is lowered to a predetermined position. A switch is provided to determine whether the detection lever has been prevented from descending to a predetermined position due to ice during a certain period of time from the start of the deicing process, or whether the ice storage container 19 is full. It is detected by a method of measuring with a scale mechanism.

  The ice tray 23 is attached to the ice making chamber 7 together with the motor device 50 by a frame device 51, and the upper side of the ice tray 23 is covered with a cover member 52. The ice making tray 23 is a synthetic resin molded body that is long installed in the front-rear direction and in which a plurality of ice making chambers 23A having upper surface openings are formed along the longitudinal direction. The ice making chamber 23A has a shape in which its peripheral wall surface expands upward. The bottom wall of each ice making chamber 23A has a double bottom, and is composed of an outer wall 23C and an inner wall 23B that is more easily deformed than the outer wall 23C. Between the inner wall 23B and the outer wall 23C, a filling chamber 61 filled with a low freezing point substance 60 that solidifies at a predetermined temperature below freezing, that is, a predetermined freezing temperature, is formed.

  When ice-making water is poured into the ice tray 23, the temperature of the ice-making tray 23 rises due to the temperature of the ice-making water. For this reason, the low freezing point substance 60 becomes liquid by the temperature of the ice making water at this time, and the inner wall 23B is substantially parallel to the outer wall 23C as shown in FIG. In the ice making process, the ice tray 23 is cooled below the freezing point by the temperature of the ice making chamber 7, so that the ice making water in each ice making chamber 23A is frozen, and ice 62 having a predetermined hardness along the shape of each ice making chamber 23A is formed. Generated.

  The freezing temperature of the low freezing point material 60 is set so that the low freezing point material 60 is in a solidified state when the temperature of the ice tray 23 reaches a lower freezing temperature than the temperature at which the ice 62 having the predetermined hardness is generated. Is set in advance. In this solidified state, the volume expands as compared with the liquid state. With this volume expansion, the inner wall 23B is deformed so as to swell toward the ice making chamber 23A, and by this deformation, the ice 62 upon completion of ice making is lifted so as to be peeled off from the ice making tray 23 as shown in FIG. .

  As one specific example, the ice tray 23 is formed with a plurality of ice making chambers 23 </ b> A having an upper surface opening in each of the left and right rows along the longitudinal direction. As the low freezing point material 60, a material that solidifies at −10 ° C. and maintains a solidified state at a temperature lower than that is used. And the temperature of the ice making chamber 7 shall be -18 degreeC, and the temperature of the ice making water in the water supply container 20 cooled by the temperature of the refrigerator compartment 3 shall be 2-3 degreeC. When this ice-making water is supplied to the ice tray 23, the temperature of the ice tray 23 rises. This temperature is a temperature at which the low freezing point material 60 becomes liquid, and by supplying ice making water to the ice tray 23, the low freezing point material 60 becomes liquid, and the inner wall 23B is in a flat state before deformation as shown in FIG. It becomes.

  As the ice making process progresses, the ice making tray 23 is cooled by the temperature of the ice making chamber 7 to generate ice, and before the temperature of the ice making tray 23 drops to about −10 ° C., the ice making in each ice making chamber 23A. All of the irrigation water is frozen, and a predetermined ice 62 is formed along the shape of the ice making chamber 23A. In this way, when the ice 62 is generated and the temperature of the ice tray 23 is lowered to about −10 ° C., the low freezing point substance 60 is in a solidified state at this time, and the volume expansion is 5 to 10% as compared with the liquid state. As a result, the inner wall 23B bulges toward the ice making chamber 23A. Due to the deformation of the inner wall 23B, the ice 62 when the ice making is completed peels off from the ice tray 23 and floats as shown in FIG. 5, so that the ice 62 can be easily taken out from the ice tray 23. As the low freezing point substance 60, potassium chloride or the like having a concentration that solidifies at about −10 ° C. is used.

  When the temperature sensor attached to the ice tray 23 detects the temperature of −10 ° C. at which the ice tray 23 is lowered, the ice making process is terminated by the control circuit unit provided in the refrigerator 1 and the deicing process is started. 50 is started and the ice tray 23 is inverted by approximately 180 ° to drop the ice into the ice storage container 19 below. Then, the ice tray 23 is returned, and the ice making operation cycle is started by supplying water again and entering the ice making process. As shown in FIG. 5, if the ice 62 is peeled off from the ice tray 23, all the ice 62 can be dropped to the lower ice storage container 19 by the movement of the ice tray 23 reversed by approximately 180 °.

  Further, the ice tray 23 is formed of a synthetic resin molded body capable of twisting deformation in which a plurality of ice making chambers 23A having upper surface openings are formed in each of the left and right rows along the longitudinal direction thereof. If the rotation of the ice tray 23 portion is constrained on the side opposite to the electric mechanism 50 when it is turned 180 °, the ice tray 23 is twisted by further driving of the electric mechanism 50. By adopting a control state in which this twisting occurs slightly, even if there is ice 62 that is insufficiently detached from the ice tray 23, it can be reliably peeled off, and all the ice 62 in the ice tray 23 can be moved downward. It can be dropped into the ice storage container 19.

  If the inner wall 23B is formed to be sufficiently thinner than the outer wall 23C, the inner wall 23B can easily expand to the ice making chamber 23A side due to the volume expansion of the low freezing point material 60. The ice tray 23 is easily twisted, and the low freezing point material 60 is filled when the ice tray 23 is formed in order to easily expand the inner wall 23B toward the ice making chamber 23A by the volume expansion of the low freezing point material 60. As shown, the inner wall 23B and the outer wall 23C are integrally formed of polypropylene or polyethylene.

  In addition, the ice tray 23 is easily twisted, and the peripheral wall and the outer wall 23 </ b> C of the ice making chamber 23 </ b> A are formed in order to easily expand the inner wall 23 </ b> B toward the ice making chamber 23 </ b> A due to the volume expansion of the low freezing point material 60. It is integrally molded with polypropylene or polyethylene including the inner wall 23B, and the molded body is thin-walled with the low freezing point substance 60 placed in the bottom of the ice making chamber 23A in a closed state. The inner wall 23B can be integrated by bonding, welding, or the like. The thin inner wall 23B may be a film or a thin sheet.

  In the above embodiment, the temperature of the ice tray 23 when the ice 62 is generated in the ice tray 23 is detected by the temperature sensor, and the ice making process is terminated and the deicing process is started. The ice making process is performed by a timer-type control so that water is supplied for a certain period of time after the switch is turned on, ice is then generated for a certain period of time, and sufficient time is allowed for the low freezing point material 60 to solidify. You can also

  FIG. 6 is a partial cross-sectional view of the ice tray 23 for explaining the state at the time of water injection, and FIG. 7 is a partial cross-sectional view of the ice tray 23 for explaining the solidification state of the low freezing point substance 60 at the end of ice making. The same functional parts as those in FIGS. 1 to 5 are denoted by the same reference numerals. The refrigerator 1 is the same as that shown in FIGS. Hereinafter, the configuration and operation of FIGS. 6 and 7 will be described.

  The difference from the ice tray 23 of the first embodiment is that the lower surface of the inner wall 23B is thin at the center, and the other portions are the same as the ice tray 23 of the first embodiment. As a result, the central portion of the inner wall 23B easily expands upward, and the central portion of the inner wall 23B bulges toward the ice making chamber 23A due to the volume expansion of the low freezing point material 60, and the ice 62 is peeled off favorably.

  FIG. 8 is a cross-sectional view of the ice making tray for explaining the state at the time of water injection, and FIG. 9 is a cross-sectional view of the ice making tray for explaining the solidification state of the low freezing point substance at the end of ice making. The same functional parts as those in FIGS. 1 to 5 are indicated by the same reference numerals. The refrigerator 1 is the same as that shown in FIGS. Hereinafter, the configuration and operation of FIGS. 8 and 9 will be described.

  The difference from the ice tray 23 of the first embodiment is that the shape of the inner wall 23B is a rectangular shape in the vertical direction, and the other portions are the same as the ice tray 23 of the first embodiment. As a result, the inner wall 23B tends to extend upward, and the inner wall 23B tends to bulge toward the ice making chamber 23A due to the volume expansion of the low-freezing point material 60, so that the ice 62 is peeled off favorably.

  FIG. 10 is a cross-sectional view of an ice making tray for explaining the state at the time of water injection, and FIG. 11 is a cross-sectional view of the ice making tray for explaining the solidification state of the low freezing point substance at the end of ice making. The same functional parts as those in FIGS. 1 to 5 are indicated by the same reference numerals. The refrigerator 1 is the same as that shown in FIGS. Hereinafter, the configuration and operation of FIGS. 10 and 11 will be described.

  The difference from the ice tray 23 of the first embodiment is that the shape of the inner wall 23B is a corrugated shape represented by a substantially triangular shape in the vertical direction, and the other portions are the ice tray 23 of the first embodiment. Is the same. As a result, the inner wall 23B tends to extend upward, and the inner wall 23B tends to bulge toward the ice making chamber 23A due to the volume expansion of the low-freezing point material 60, so that the ice 62 is peeled off favorably.

  The present invention is a refrigerator with an automatic ice making machine, but the arrangement relationship between the refrigerator compartment and the freezer compartment is not limited to the above-described form, and can be applied to various refrigerator forms without departing from the technical scope of the present invention. .

It is a front view of this invention refrigerator. (Example 1) It is a front view of the refrigerator main body of this invention. (Example 1) It is water supply state explanatory drawing from the water supply container of this invention to the ice making part. (Example 1) It is sectional drawing of the ice tray of this invention explaining the state at the time of water injection. (Example 1) It is sectional drawing of the ice tray of this invention explaining the solidification state of the low freezing point substance at the time of completion | finish of ice making. (Example 1) It is a fragmentary sectional view of the ice tray of the present invention explaining the state at the time of water pouring. (Example 2) It is a fragmentary sectional view of the ice tray of this invention explaining the solidification state of the low freezing point substance at the time of completion | finish of ice making. (Example 2) It is a fragmentary sectional view of the ice tray of the present invention explaining the state at the time of water pouring. Example 3 It is a fragmentary sectional view of the ice tray of this invention explaining the solidification state of the low freezing point substance at the time of completion | finish of ice making. Example 3 It is a fragmentary sectional view of the ice tray of the present invention explaining the state at the time of water pouring. (Example 4) It is a fragmentary sectional view of the ice tray of this invention explaining the solidification state of the low freezing point substance at the time of completion | finish of ice making. (Example 4)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Refrigerator 2 ... Refrigerator main body 3 ... Refrigeration room 4 ... Vegetable room 5 ... Freezing room 6 ... Ice making room 7 ... Ice making room 18 ... Automatic ice making machine 20. ··· Water supply container 23 · · · ice tray 23A · · ice making chamber 23B · · inner wall 23C · · · outer wall 60 · low freezing point material 61 · low freezing point material filling chamber 62 · · · ice

Claims (6)

  A synthetic resin molded body in which a plurality of ice making chambers having an upper surface opening are formed, wherein the bottom wall of each ice making chamber is configured with an inner wall that is more easily deformed than an outer wall, and the inner wall and the outer wall Between the walls, there is formed a filling chamber filled with a low freezing point substance which becomes liquid by the temperature of the ice-making water and becomes solidified below a predetermined freezing temperature and expands in volume. An ice making tray characterized in that ice upon completion of ice making is peeled off from the ice making tray by wall deformation.   A synthetic resin molded body capable of torsional deformation in which a plurality of ice making chambers having upper surface openings are formed in each of the left and right rows along the longitudinal direction so as to make ice by freezing the injected ice making water in a freezing temperature atmosphere. The bottom wall of each ice making chamber is composed of an inner wall that is more easily deformed than the outer wall, and the space between the inner wall and the outer wall becomes liquid depending on the temperature of the ice making water. A filling chamber filled with a low freezing point substance that expands in a solidified state below a predetermined freezing temperature is formed, and the ice at the completion of ice making is peeled off from the ice tray by deformation of the inner wall accompanying the volume expansion. An ice tray characterized by   The ice tray according to claim 1 or 2, wherein the inner wall is formed thinner than the outer wall.   The ice tray according to any one of claims 1 to 3, wherein the ice tray including the inner wall and the outer wall is integrally formed of polypropylene or polyethylene.   The ice tray according to any one of claims 1 to 4, wherein the inner wall has an uneven shape in the vertical direction.   Ice-making water in a water supply container provided in the refrigerator compartment in the refrigerator body is supplied to the ice tray of the automatic ice maker provided in the freezer compartment, and the cold air cooled by the cooler is supplied to the ice tray by the blower. In the refrigerator with an automatic ice making machine, the ice tray is a synthetic resin molded body in which a plurality of ice making chambers having upper surface openings are formed in left and right rows along a longitudinal direction, and a bottom wall of each ice making chamber is an outer wall. The inner wall is more easily deformed than the inner wall, and the space between the inner wall and the outer wall becomes liquid due to the temperature of the ice making water and becomes a solidified state below a predetermined freezing temperature. It has a filling chamber filled with a freezing point material, and is configured to peel off ice at the time of ice making completion from the ice making dish by deformation of the inner wall accompanying the volume expansion, and in a solidified state of the low freezing point material by a motor device Invert the ice tray Refrigerator with automatic ice maker and performing the drop allowed to de-ice operation to the ice container downward.

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