JPH05157424A - Automatic ice making device - Google Patents

Abstract

PURPOSE:To obtain highly transparent and delicious water in an automatic ice making device for a refrigerator. CONSTITUTION:This automatic ice making device comprises an ice making saucer 13 which stores water supplied from a water supply device, a pivot 12 which is fixedly coupled with one end of the ice making saucer, a drive device which rotates the ice making saucer with the pivot as its axis and an ice making control means which operates the drive device intermittently during ice making operation in such a fashion that the water in the ice making saucer may be shaken with slight waves and operates the drive device after the end of ice making and rotates and then turns back the saucer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic ice making device which automatically prepares transparent ice for a refrigerator or the like.

[0002]

2. Description of the Related Art Conventionally, in household refrigerators and the like,
The water supplied from the water supply device is stored in an ice tray to make ice,
2. Description of the Related Art An automatic ice making device in which a driving device rotates and inverts an ice tray after ice making to remove ice is widely used.

The above-mentioned automatic ice making device will be described below with reference to FIGS. 8 to 9. Reference numeral 1 denotes a refrigerator body, which is composed of an outer box 2, an inner box 3, and a heat insulating material 4 filled between the outer box 2 and the inner box 3. Reference numeral 5 denotes a partition wall that partitions the inside of the refrigerator body 1 into upper and lower parts, and has a freezer compartment 6 at the top.
A refrigerating room 7 is formed in the lower part. 8 is the freezing room 6
Is a cooler of the refrigeration cycle provided on the back side of the refrigerator, and 9 is a blower for forcedly ventilating the cool air cooled by the cooler into the freezing compartment 6 and the refrigerating compartment 7.

Next, 10 is an automatic ice-making machine provided in the freezing compartment 6, which is a drive unit 11 incorporating a motor and a reduction gear group (not shown), and an ice-making machine in which a supporting shaft 12 is fixedly connected to the central portion. The tray 13 includes a plate 13 and a frame 14 for supporting the ice tray 13 by the drive unit 11.

Numeral 15 is a stopper provided in a part of the outer shell of the drive unit 11 in order to distort and deform the ice tray 13 so as to remove ice, and 16 is the icemaker so as to come into contact with the stopper. It is a backing plate attached on the plate 13.

Reference numeral 17 denotes an ice storage box provided below the automatic ice making machine 10. Reference numeral 18 is a water supply tank for storing water for ice making, which is detachably provided in one drawing in the refrigerating chamber 7. Reference numeral 19 denotes a water supply port of the water supply tank 18, which is opened and closed by a valve 20. Reference numeral 21 denotes a water tray provided below the water supply port 19 of the water supply tank 18. When the water supply tank 18 is set with the water supply port 19 facing downward, the valve 20 is pushed up to open the water supply port 19. Is configured.

Reference numeral 22 is a water supply pump for pumping the water received in the water receiving tray 21, and 23 is connected to the water supply pump 22 so that its outlet faces the ice tray 13 of the automatic ice making machine 10. It is a water supply pipe arranged in this way.

The operation of this conventional automatic ice making device 10 will be described. When the user sets the water supply tank 18 filled with water at a predetermined position, the valve 20 is pushed up, the water supply port 19 is opened, and the water pan 21 is filled with water. After that, the filled water is pumped up by the water supply pump 22 and poured into the ice tray 13 through the water supply pipe 23. In this way, the water filled in the ice tray 13 by a predetermined amount is frozen by the cooling action in the freezer compartment 6 to generate ice.

When the ice making is completed, the ice tray 13 is rotated and inverted about the support shaft 12 by the rotating action of the drive unit 11, and the abutting plate 16 is brought into contact with the stopper 15, so that the ice tray 13 is distorted and deformed. The ice in the ice tray 13 is released. The released ice falls into the ice storage box 17 and is stored therein, and the ice tray 13 that has completed the ice removing operation is restored to the original state by the reverse rotation operation of the drive device 11 again.

Thereafter, this operation is repeated until the water in the water supply tank 18 is used up to automatically perform ice making and ice storage.

[0011]

Since ice has a property of not capturing a gas component in its crystal lattice, when water freezes, the gas component dissolved in water is discharged out of the ice crystal lattice. .. Therefore, in the above configuration, the gas component dissolved in water when ice is generated becomes bubbles on the freezing surface and is taken into the ice, so that the central portion becomes cloudy and the opaque taste is not good. It becomes ice. Therefore, there is a problem in that the ice cannot be organoleptically suitable for use with water such as whiskey and drinks such as juice.

The present invention solves the above-mentioned problems of the prior art, and an object of the present invention is to provide an automatic ice-making device having high transparency and capable of producing ice with good taste.

[0013]

SUMMARY OF THE INVENTION An automatic ice making apparatus of the present invention comprises an ice tray for storing water and making ice, a support shaft connected and fixed to one end of the ice tray, and the ice tray around the support shaft. And a drive device for rotating the drive device, and an ice-making control means for rotating and vibrating the drive device during ice making so that the water in the ice-making tray undulates, and activating the drive device after completion of ice-making to turn and reverse the ice-making tray. I am configuring.

Further, the ice tray, the support shaft, the driving device, a temperature sensor provided in the ice tray, and an ice making start signal from the temperature sensor cause the driving device to move to such an extent that the water in the ice tray undulates. It comprises an ice making control means for turning and oscillating the ice making tray after stopping the driving device in response to an ice making completion signal from the temperature sensor.

Further, the ice tray, the support shaft, the driving device, the temperature sensor, a heater provided on the upper surface of the ice tray, and the heater are operated by an ice formation start signal from the temperature sensor. With the ice making control means for turning and oscillating the driving device to the extent that the water of the ice making tray undulates, and stopping the heater and the driving device by the ice making completion signal from the temperature sensor, and then turning the ice making tray in reverse. I am configuring.

[0016]

According to this structure, during the ice making, the driving device is oscillated to oscillate to such an extent that the water in the ice making tray undulates, whereby the formation of ice on the water surface side is delayed, and the ice is sequentially formed from the bottom side of the ice making tray. The water surface side will be formed last. And
Even if gas components dissolved in water become bubbles on the freezing surface, they are aggregated before being taken into the ice by rotational vibration and rise by buoyancy to escape into the atmosphere, so that there is no cloudiness and is transparent. You can make ice.

Further, when the driving device is operated after the water is cooled to 0 ° C. and the ice making is completed, the driving device is stopped, whereby the time for producing transparent ice can be shortened. Further, after the water is cooled to 0 ° C., the heater and the driving device provided on the upper surface of the ice tray are operated, and when the ice making is completed, the heater and the driving device are stopped, thereby further delaying the formation of ice on the water surface side. , Ice is sequentially formed from the bottom side of the ice making tray, and the water surface side is surely formed at the end, so by more effectively escaping the gas component dissolved in water, clear ice without white turbidity Can be made reliably.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. The external structure of the automatic ice making device and the structure for mounting it on the refrigerator are the same as those of the conventional example, and therefore the drawings and detailed description thereof are omitted.

First, the electric circuit shown in FIG. 1 will be described. A power outlet 24 is connected to the water supply pump 22 via a normally open contact 26 of the first relay 25, and is connected to a primary side of a power transformer 28 in a control device (ice making control means) 27 for performing a series of ice making control. Has been done. A power supply circuit 29 is connected to the secondary side of the power supply transformer 28.
The control device 27 has a horizontal position detection switch 30 and an inverted position detection switch 31 of the ice tray as inputs.

One end of the horizontal position detection switch 30 is connected to the DC power supply Vcc, and the other end is grounded through the resistor R1 and is connected to the input terminal a of the microcomputer 32. Further, one end of the inversion position detection switch 31 is connected to the DC power supply Vcc, and the other end is grounded via the resistor R2 and is also connected to the input terminal b of the microcomputer 32.

The output terminals c and d of the microcomputer 32 are connected to a motor 34 in the driving device 11 via a motor driving circuit 33. In addition, the output terminal e is the first relay 2 having the normally open contact 26 via the buffer 35.
Connected to 5.

The automatic ice making device configured as described above will be described with reference to the flowchart of FIG.

First, in the water supply process, when the user sets the water supply tank 18 filled with water at a predetermined position, the valve 20 is pushed up and the water supply port 19 is opened to fill the water tray 21 with water. .. Then, in step 36, H is output to the output terminal e of the microcomputer 32 for a certain period of time, the water supply pump 22 is operated for a certain period of time, and a predetermined amount of water is supplied to the ice tray 13 via the water supply pipe 23.

In the ice making process, in step 37, an integrated time for setting a time (time C) until completion of ice making is started. In step 38, the microcomputer 32
H and L are output to the output terminals c and d respectively for a fixed time A, and the motor 34 in the drive device 11 is normally rotated for a fixed time A through the motor drive circuit 33. Subsequently, in step 39, L and H are output to the output terminals c and d of the microcomputer 32 for a fixed time 2A, respectively, and the motor 34 is reversely rotated for a fixed time 2A.

Then, in step 40, the motor 34 is normally rotated again. When the ice tray 13 is returned to the horizontal position and the horizontal position detection switch 30 is turned on in step 41, the motor is stopped in step 42. Then, when the ice making completion time (time C) has not been reached in step 44 after the fixed time B has passed in step 43, step 38 is performed again.
Return to. By the series of operations from step 38 to step 42, the ice tray 13 is moved to the support shaft 1 as shown in FIG.
Rotational vibration centering around 2 is performed.

In this ice making process, the cold air cooled by the cooler 8 by the blower 9 is cooled from the bottom of the ice tray 13 through the ventilation passage at the bottom of the ice tray 13, so that the ice making operation is performed on the bottom surface of the ice tray 13. The water surface side freezes at the end. Then, by applying the rotational vibration shown in FIG.
Before 7 is taken into the ice, it can be aggregated and lifted by buoyancy to escape into the atmosphere.

When the predetermined ice making time (time C) is reached, the water in the ice making tray 14 is completely made, and the ice making process is finished at step 44.

Next, the ice removing step is performed. In step 45, H and L are output to the output terminals c and d of the microcomputer 32, and the motor 34 in the drive device 11 is rotated in the forward direction via the motor drive circuit 33. The ice tray 13 is rotated around the support shaft 12 by the rotating action of the drive device 11, and the contact plate 16 comes into contact with the stopper 15, so that the ice tray 13 is distorted and deformed so that the ice in the ice tray 13 is separated. Be iced. The released ice falls into the ice storage box 17 and is stored therein.

In step 46, when the ice tray 13 reaches the reverse position and the reverse position detection switch 31 is turned on, in step 47, L and H are output to the output terminals c and d of the microcomputer 32 to reverse the motor 34. To do. Then, the ice tray 13 for which the ice removing action has ended returns to the original state again. When the ice tray 14 is returned to the horizontal position and the horizontal position detection switch 30 is turned on in step 48,
In step 49, the motor is stopped.

Then, in step 50, it is judged whether or not the ice stored in the ice storage box 17 is full, and if it is not full, the process returns to step 36, and if full, it waits as it is.

As described above, according to this embodiment, since the driving device is rotated and oscillated to the extent that the water in the ice making tray undulates during ice making, the formation of ice on the water surface side is delayed and the ice is made in the ice making tray. Are sequentially formed from the bottom side, and the water surface side is formed last. Even if gas components dissolved in water become bubbles on the freezing surface, they are aggregated before being taken into the ice due to rotational vibration and rise by buoyancy to escape into the atmosphere, so there is no cloudiness. It can make transparent ice.

A second embodiment of the present invention will be described below with reference to FIGS. The external structure of the automatic ice making device and the structure for mounting it on the refrigerator are the same as those of the conventional example, and therefore the drawings and detailed description thereof are omitted.

First, the electric circuit shown in FIG. 4 will be described. A power outlet 24 is connected to the water supply pump 22 via a normally open contact 26 of the first relay 25, and is connected to a primary side of a power transformer 28 in a control device (ice making control means) 27 for performing a series of ice making control. Has been done. A power supply circuit 29 is connected to the secondary side of the power supply transformer 28.
The control device 27 has, as inputs, a horizontal position detection switch 30 for the ice tray, an inverted position detection switch 31, and a temperature sensor 51 provided on the ice tray 13.

One end of the horizontal position detection switch 30 is connected to the DC power supply Vcc, and the other end is grounded via the resistor R1 and is connected to the input terminal a of the microcomputer 32. Further, one end of the inversion position detection switch 31 is connected to the DC power supply Vcc, and the other end is grounded via the resistor R2 and is also connected to the input terminal b of the microcomputer 32.

The temperature sensor 51 is an NTC thermistor, and its electric resistance decreases as the temperature of the object to be detected increases.
It also has a negative temperature characteristic in which the electric resistance increases as the temperature decreases. One end of the temperature sensor 51 has a DC power source Vc.
The other end is connected to the input terminal f of the microcomputer 44 while being grounded via the resistor R3.

The connection point of the resistors R4 and R5 is connected to the input terminal g of the microcomputer 32,
The other end of the resistor R4 is connected to the DC power supply Vcc, and the other end of the resistor R5 is grounded. Resistor R6 and resistor R7
Is connected to the input terminal h of the microcomputer 32, and the other end of the resistor R6 is connected to the DC power source V
It is connected to cc and the other end of the resistor R7 is grounded. The resistors R4 and R5 have an ice making start temperature (for example, -1).
The first reference voltage corresponding to
6 and R7 form a second reference voltage corresponding to the ice making completion temperature (for example, -15.0 ° C).

The output terminals c and d of the microcomputer 32 are connected to a motor 34 in the driving device 11 via a motor driving circuit 33. In addition, the output terminal e is the first relay 2 having the normally open contact 26 via the buffer 35.
Connected to 5.

The automatic ice making device configured as described above will be described with reference to the flowchart of FIG.

First, in the water supply process, when the user sets the water supply tank 18 filled with water at a predetermined position, the valve 20 is pushed up and the water supply port 19 is opened to fill the water pan 21 with water. .. Then, in step 36, H is output to the output terminal e of the microcomputer 32 for a certain period of time, the water supply pump 22 is operated for a certain period of time, and a predetermined amount of water is supplied to the ice tray 13 via the water supply pipe 23.

In the ice making step, in step 52, the voltage signal based on the temperature detected by the temperature sensor 51 is compared with the first reference voltage corresponding to the ice making start temperature (for example, -10.0 ° C.), and the ice tray 13 is cooled. Judge whether the water has reached 0 ° C. If the temperature detected by the temperature sensor 51 is lower than the ice making start temperature, the routine proceeds to step 38.

In step 38, H and L are output to the output terminals c and d of the microcomputer 32 for a fixed time A, respectively, and the drive unit 1 is driven via the motor drive circuit 33.
The motor 34 in 1 is rotated in the normal direction for a fixed time A. Subsequently, in step 39, the microcomputer 32
Then, L and H are output to the output terminals c and d for 2 A for a fixed time, and the motor 34 is rotated in the reverse direction for 2 A.

Then, in step 40, the motor 34 is normally rotated again. When the ice tray 14 is returned to the horizontal position and the horizontal position detection switch 30 is turned on in step 41, the motor is stopped in step 42. Then, after a lapse of a certain time B in step 43, in step 53, the voltage signal based on the temperature detected by the temperature sensor 51 and the second reference voltage corresponding to the ice making completion temperature (for example, -15.0 ° C) are compared. Then, it is determined whether or not the water in the ice tray 13 is completely frozen and becomes 0 ° C. or less. If the temperature detected by the temperature sensor 51 is higher than the ice making completion temperature, the process returns to step 38 again. By the series of operations from step 38 to step 42, the ice tray 13 oscillates about the support shaft 12 as shown in FIG.

In this ice making step, the cold air cooled by the cooler 8 by the blower 9 is cooled from the bottom of the ice tray 13 through the ventilation passage at the bottom of the ice tray 13, so that the ice making operation is performed on the bottom surface of the ice tray 13. The water surface side freezes at the end. Then, by applying the rotational vibration shown in FIG.
Before 7 is taken into the ice, it can be aggregated and lifted by buoyancy to escape into the atmosphere. In step 53, the voltage signal based on the temperature detected by the temperature sensor 51 and the second reference voltage corresponding to the ice making completion temperature (for example, -15.0 ° C) are compared, and the water in the ice making tray 13 is completely frozen. To determine whether the temperature has dropped below 0 ° C. If the temperature detected by the temperature sensor 51 is lower than the ice making completion temperature, the ice making process is ended.

Next, the ice removing step is performed. In step 45, H and L are output to the output terminals c and d of the microcomputer 32, and the motor 34 in the drive device 11 is rotated in the forward direction via the motor drive circuit 33. The ice tray 13 is rotated around the support shaft 12 by the rotating action of the drive device 11, and the contact plate 16 comes into contact with the stopper 15, so that the ice tray 13 is distorted and deformed so that the ice in the ice tray 13 is separated. Be iced. The released ice falls into the ice storage box 17 and is stored therein.

In step 46, when the ice tray 13 reaches the reverse position and the reverse position detection switch 31 is turned on, in step 47, L and H are output to the output terminals c and d of the microcomputer 32 to reverse the motor 34. To do. Then, the ice tray 13 for which the ice removing action has ended returns to the original state again. When the ice tray 14 is returned to the horizontal position and the horizontal position detection switch 30 is turned on in step 48,
In step 49, the motor is stopped.

Then, in step 50, it is judged whether or not the ice stored in the ice storage box 17 is full, and if it is not full, the process returns to step 36, and if it is full, it waits as it is.

As described above, according to this embodiment, since the driving device is rotated and oscillated so that the water in the ice tray is undulated during ice making, the formation of ice on the water surface side is delayed, and the ice is made in the ice tray. Are sequentially formed from the bottom side, and the water surface side is formed last. Even if gas components dissolved in water become bubbles on the freezing surface, they are aggregated before being taken into the ice due to rotational vibration and rise by buoyancy to escape into the atmosphere, so there is no cloudiness. You can make transparent ice.

Further, the drive unit is not operated until the water temperature reaches 0 ° C., and the drive unit is operated after the water is cooled to 0 ° C., and when the ice making is completed, the drive unit is stopped, thereby making the transparent state. The time for producing ice can be shortened, and the life and reliability of the motor in the drive device can be improved.

The third embodiment of the present invention will be described below with reference to FIGS. 6 to 7. The external structure of the automatic ice making device and the structure for mounting it on the refrigerator are the same as those of the conventional example, and therefore the drawings and detailed description thereof are omitted.

First, the electric circuit shown in FIG. 6 will be described. Reference numeral 24 is a power outlet, which is connected to the water supply pump 22 via the normally open contact 26 of the first relay 25, and is connected to the heater 56 attached to the upper surface of the ice tray 13 via the normally open contact 55 of the second relay 54. The primary side of the power transformer 28 in the control device (ice making control means) 27 that performs a series of ice making control is connected. A power supply circuit 29 is connected to the secondary side of the power supply transformer 28. The control device 2
7, the horizontal position detection switch 3 of the ice tray is used as an input.
0, a reverse position detection switch 31, and a temperature sensor 51 provided on the ice tray 13.

One end of the horizontal position detection switch 30 is connected to the DC power supply Vcc, and the other end is grounded via the resistor R1 and is also connected to the input terminal a of the microcomputer 32. Further, one end of the inversion position detection switch 31 is connected to the DC power supply Vcc, and the other end is grounded via the resistor R2 and is also connected to the input terminal b of the microcomputer 32.

The temperature sensor 51 is an NTC thermistor, and its electric resistance decreases as the temperature of the object to be detected increases.
It also has a negative temperature characteristic in which the electric resistance increases as the temperature decreases. One end of the temperature sensor 51 has a DC power source Vc.
The other end is connected to the input terminal f of the microcomputer 44 while being grounded via the resistor R3.

The connection point of the resistors R4 and R5 is connected to the input terminal g of the microcomputer 32,
The other end of the resistor R4 is connected to the DC power supply Vcc, and the other end of the resistor R5 is grounded. Resistor R6 and resistor R7
Is connected to the input terminal h of the microcomputer 32, and the other end of the resistor R6 is connected to the DC power source V
It is connected to cc and the other end of the resistor R7 is grounded. The resistors R4 and R5 have an ice making start temperature (for example, -1).
The first reference voltage corresponding to
6 and R7 form a second reference voltage corresponding to the ice making completion temperature (for example, -15.0 ° C).

The output terminals c and d of the microcomputer 32 are connected to a motor 34 in the driving device 11 via a motor driving circuit 33. In addition, the output terminal e is the first relay 2 having the normally open contact 26 via the buffer 35.
5, the output terminal i is connected via a buffer to a second relay 54 having a normally open contact 55.

The automatic ice making device configured as described above will be described with reference to the flowchart of FIG.

First, in the water supply process, when the user sets the water supply tank 18 filled with water at a predetermined position, the valve 20 is pushed up and the water supply port 19 is opened to fill the water tray 21 with water. .. Then, in step 36, H is output to the output terminal e of the microcomputer 32 for a certain period of time, the water supply pump 22 is operated for a certain period of time, and a predetermined amount of water is supplied to the ice tray 13 via the water supply pipe 23.

In the ice making process, in step 52, the voltage signal based on the temperature detected by the temperature sensor 51 and the first reference voltage corresponding to the ice making start temperature (for example, -10.0 ° C.) are compared, and the ice tray 13 is cooled. Judge whether the water has reached 0 ° C. If the temperature detected by the temperature sensor 51 is lower than the ice making start temperature, the heater 56 is turned on in step 58. .

In step 38, H and L are output to the output terminals c and d of the microcomputer 32 respectively for a predetermined time A, and the driving device 1 is driven through the motor driving circuit 33.
The motor 34 in 1 is rotated in the normal direction for a fixed time A. Subsequently, in step 39, the microcomputer 32
Then, L and H are output to the output terminals c and d for 2 A for a fixed time, and the motor 34 is rotated in the reverse direction for 2 A.

Then, in step 40, the motor 34 is normally rotated again. When the ice tray 14 is returned to the horizontal position and the horizontal position detection switch 30 is turned on in step 41, the motor is stopped in step 42. Then, after a lapse of a certain time B in step 43, in step 53, the voltage signal based on the temperature detected by the temperature sensor 51 and the second reference voltage corresponding to the ice making completion temperature (for example, -15.0 ° C) are compared. Then, it is determined whether or not the water in the ice tray 13 is completely frozen and becomes 0 ° C. or less. If the temperature detected by the temperature sensor 51 is higher than the ice making completion temperature, the process returns to step 38 again. By the series of operations from step 38 to step 42, the ice tray 13 oscillates about the support shaft 12 as shown in FIG.

In this ice making step, the cold air cooled by the cooler 8 by the blower 9 is cooled from the bottom of the ice tray 13 through the ventilation passage at the bottom of the ice tray 13, so that the ice making operation is performed on the bottom surface of the ice tray 13. The water surface side freezes at the end. Then, by applying the rotational vibration shown in FIG.
Before 7 is taken into the ice, it can be aggregated and lifted by buoyancy to escape into the atmosphere. In step 53, the voltage signal based on the temperature detected by the temperature sensor 51 and the second reference voltage corresponding to the ice making completion temperature (for example, -15.0 ° C) are compared, and the water in the ice making tray 13 is completely frozen. To determine whether the temperature has dropped below 0 ° C. If the temperature detected by the temperature sensor 51 is lower than the ice making completion temperature, the heater 56 is turned off in step 59. Since the temperature of the ice is still high at this point, the ice making process is terminated after the ice making is continued for a sufficient time (time D) to cool the ice to the set temperature in the freezer compartment.

Next, the ice removing step is performed. In step 45, H and L are output to the output terminals c and d of the microcomputer 32, and the motor 34 in the drive device 11 is rotated in the forward direction via the motor drive circuit 33. The ice tray 13 is rotated around the support shaft 12 by the rotating action of the drive device 11, and the contact plate 16 comes into contact with the stopper 15, so that the ice tray 13 is distorted and deformed so that the ice in the ice tray 13 is separated. Be iced. The released ice falls into the ice storage box 17 and is stored therein.

In step 46, when the ice tray 13 reaches the reverse position and the reverse position detecting switch 31 is turned on, in step 47, L and H are output to the output terminals c and d of the microcomputer 32 to reverse the motor 34. To do. Then, the ice tray 13 for which the ice removing action has ended returns to the original state again. When the ice tray 14 is returned to the horizontal position and the horizontal position detection switch 30 is turned on in step 48,
In step 49, the motor is stopped.

Then, in step 50, it is judged whether or not the ice stored in the ice storage box 17 is full, and if it is not full, the process returns to step 36, and if full, it waits as it is.

As described above, according to this embodiment, since the drive device is oscillated to oscillate so that the water in the ice making tray undulates during ice making, the formation of ice on the water surface side is delayed and the ice is made in the ice making tray. Are sequentially formed from the bottom side, and the water surface side is formed last. Even if gas components dissolved in water become bubbles on the freezing surface, they are aggregated before being taken into the ice due to rotational vibration and rise by buoyancy to escape into the atmosphere, so there is no cloudiness. You can make transparent ice.

Further, after the water is cooled to 0 ° C., the heater and the driving device provided on the upper surface of the ice tray are operated, and when the ice making is completed, the heater and the driving device are stopped,
The formation of ice on the water surface side is further delayed, and ice is sequentially formed from the bottom side of the ice making tray to ensure that the water surface side is formed last, so that the gas component dissolved in water is more effectively released. By doing so, it is possible to reliably make clear ice without cloudiness.

[0066]

As described above, according to the present invention, an ice tray for storing water and making ice, a support shaft connected and fixed to one end of the ice tray, and the ice tray rotating about the support shaft. By providing a drive device and an ice making control means for oscillating the drive device during ice making to such an extent that the water in the ice tray undulates, and activating the drive device after completion of ice making to turn and reverse the ice tray. , The formation of ice on the water surface side is delayed, and ice is formed sequentially from the bottom side of the ice tray, and the water surface side is formed last, so there is no cloudiness by letting out the gas component dissolved in water. It is possible to make transparent ice, and its practical effect is great.

Further, a temperature sensor provided in the ice tray and an ice making start signal from the temperature sensor cause the drive device to rotate and vibrate to such an extent that water in the ice tray undulates, and an ice making completion signal from the temperature sensor causes the driving device to rotate. By providing an ice making control means for turning and reversing the ice making tray after stopping the driving device, the driving device is operated after the water is cooled to 0 ° C., and the driving device is stopped when the ice making is completed, The time for producing transparent ice can be shortened, and the life and reliability of the motor in the drive device can be improved, and its practical effect is great.

Further, the heater provided on the upper surface of the ice tray and the heater are operated in response to an ice making start signal from the temperature sensor, and the driving device is rotated and oscillated to the extent that the water in the ice tray undulates. By providing the ice making control means for turning and reversing the ice making tray after stopping the heater and the driving device by the ice making completion signal from the sensor, the water is cooled to 0 ° C. and then provided on the upper surface of the ice making tray. The heater and the driving device are operated, and when the ice making is completed, the heater and the driving device are stopped, so that the formation of ice on the water surface side is further delayed, and ice is sequentially formed from the bottom side of the ice tray to ensure that the water surface side is the last. Since it will be formed in the water, by more effectively letting out the gas component dissolved in water, transparent ice without cloudiness can be surely made, and its practical effect is There are things made.

[Brief description of drawings]

FIG. 1 is an electric circuit diagram of an automatic ice making device according to an embodiment of the present invention.

FIG. 2 is an operation flowchart of the device.

FIG. 3A is a sectional view showing a stationary state of the ice tray, FIG. 3B is a sectional view showing a state in which the ice tray is rotated rightward in the figure, and FIG. Sectional view at time (d) is a sectional view showing a state further rotated to the left side. (E) is a sectional view at the time of returning to the original state by rotating to the right side in the figure.

FIG. 4 is an electric circuit diagram of an automatic ice making device according to a second embodiment of the present invention.

FIG. 5 is an operation flowchart of the device.

FIG. 6 is an electric circuit diagram of an automatic ice making device according to a third embodiment of the present invention.

FIG. 7 is an operation flowchart of the device.

FIG. 8 is a cross-sectional view of a refrigerator including an automatic ice making device showing a conventional example.

FIG. 9 is an enlarged perspective view of essential parts of a conventional automatic ice making device. 11 drive device 12 support shaft 13 ice making tray 27 ice making control means 51 temperature sensor 56 heater

Claims (3)

[Claims] 1. An ice tray for storing water supplied from a water supply device to make ice, a support shaft connected and fixed to one end of the ice tray, and a drive device for rotating the ice tray around the support shaft. And an ice making control means for oscillating the driving device during ice making to the extent that the water in the ice making plate undulates, and activating the driving device after the completion of ice making to turn the ice making plate in reverse. .. 2. An ice tray that stores water supplied from a water supply device to make ice, a support shaft connected and fixed to one end of the ice tray, and a drive device that rotates the ice tray around the support shaft. A temperature sensor provided in the ice tray, and an ice making start signal from the temperature sensor causes the driving device to rotate and vibrate to such an extent that the water in the ice tray undulates, and the driving device receives an ice making completion signal from the temperature sensor. And an ice making control means for turning and reversing the ice making tray after stopping. 3. An ice tray for storing water supplied from a water supply device to make ice, a support shaft connected and fixed to one end of the ice tray, and a drive device for rotating the ice tray around the support shaft. A temperature sensor provided on the ice tray, a heater provided on the upper surface of the ice tray, and the heater is operated in response to an ice making start signal from the temperature sensor, and the driving device is driven to the extent that the water in the ice tray undulates. An automatic ice making device comprising: an ice making control means for turning and vibrating the ice making tray after turning the heater and the driving device in response to an ice making completion signal from the temperature sensor.