JP2681719B2 - Ice breaker for ice machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ice removing device for detecting an ice storage state of an ice storage container and continuously releasing ice from the ice making tray when ice is continuously produced by the ice making tray. It is used for the refrigerator.

[0002]

2. Description of the Related Art Conventionally, in an ice maker for a domestic refrigerator, as disclosed in, for example, Japanese Utility Model Publication No. 1-172685, water is automatically supplied to an ice tray made of synthetic resin and having a substantially rectangular shape in plan view. Then, when it is detected that the ice has frozen by the temperature sensor, the ice tray is rotated by the ice separating mechanism connected to one end of the ice tray to twist the ice tray, which elastically distorts the ice tray, It is known that the peeling is performed and the peeling is performed so as to be dropped in an ice storage container below.

[0003]

By the way, in such an ice removing device, the ice storage device is arranged under the ice making tray and the ice storage amount of the ice storage device is detected. For example, when it is determined that the ice storage amount is small, the ice storage device is released. The ice mechanism is operated to remove ice, while the ice mechanism is deactivated when it is detected that the ice storage container is full.

In this case, at least three detecting means are required for controlling the ice removing mechanism. That is, it detects the amount of ice storage in the ice storage device, detects that the ice tray is in the horizontal position, and detects that the ice tray is in the maximum twist position. A micro switch is generally used as the detection means, but other sensors can also be used. In such an ice removing device, there is a demand to reduce the cost as much as possible and to make the entire device compact.

The present invention has been made paying attention to such a point, and the detection of the ice storage amount is performed by the detecting means for position detection using a simple mechanism, so that the ice The object of the present invention is to reduce the number of detecting means to two and to reduce the cost and to make the entire apparatus compact while ensuring the function of appropriately performing the replenishment.

[0006]

In order to achieve the above-mentioned object, the solving means of the present invention supports both ends of an ice tray, one end of which is rotated by a drive mechanism at a predetermined angle and the other end of which is rotated at the above-mentioned predetermined value. It is premised on the ice removing device of an ice making machine in which the ice tray is twisted while being restrained in the middle of the angle. On the other hand, the rotation of the clutch cam of the drive mechanism
More, a first detecting means for detecting that the ice tray is in a horizontal position, and the second detection means for detecting that one end of the ice tray is in the maximum twisting position, the second depending on the ice of the ice storage unit
The ice detection mechanism that activates the detection means and the crack that allows the ice detection mechanism to operate only in a specific section that is set between the time when one end of the ice tray passes the horizontal position and the time when it reaches the maximum twist position.
The detection limit mechanism installed on the Chicam and the detection permission in the same section
Ice detection timer that counts the amount of time and when the detection is allowed
Based on the output of the second detection means during the interval, when one end of the ice tray reaches the specific section, the ice tray is rotated toward the maximum twist position or reversed toward the horizontal position according to the ice storage amount. A rotation control unit that determines whether or not the drive mechanism is controlled is provided.

[0007]

With the above structure, the drive mechanism is controlled by the ice detection timer and the rotation control means, and when one end of the ice tray rotates from the horizontal position to reach the specific section, the second detection means operates.
Based on the output, when the ice storage amount is small, the ice tray is rotated to the maximum twist position as it is, so that the ice storage device is replenished with ice. On the other hand, when the amount of ice storage is large, the ice tray immediately reverses and returns to the horizontal position, which prevents ice from overflowing the ice storage device.

In that case, when one end of the ice tray is located in the specific section, the ice storage amount of the ice storage device is small due to the ice detection mechanism.
If not, turn on the second detection means, while the amount of ice storage is high.
When it is not, the second detecting means is kept off, and the output signal of the second detecting means provides information on the ice storage amount. Therefore, the number of detecting means is two.

[0009]

Embodiments will be described below. 1 to 3, reference numeral 1 denotes a casing of an ice separating device, and an ice tray 2 is arranged on one side of the casing 1. One end of the ice tray 2 is connected to a drive mechanism (described later) in the casing, and the other end is rotatably supported in the ice making chamber. The ice tray 2 is made of a synthetic resin and has a substantially rectangular shape in plan view, and has a large number of ice-making storage portions. An ice storage device 3 for storing ice is disposed below the ice tray 2. Therefore, at the time of ice removal, one end of the ice tray 2 is rotated by a predetermined angle by the drive mechanism, and the rotation of the other end of the ice tray 2 is restrained in the middle of the predetermined angle by a stopper or the like so that the ice tray 2 is twisted to remove ice. Then, the separated ice is collected in the ice storage device 3.

The drive mechanism 10 for rotating the ice tray 2 will be described. Reference numeral 11 is a motor, 12 is a worm gear attached to the rotary shaft of the motor 11, 13 is a first reduction gear in which an input gear meshing with the worm gear 12 and an output gear having a smaller number of teeth are assembled, and 14 is a first reduction gear. A second reduction gear in which an input gear meshing with the output gear 13 and an output gear having a smaller number of teeth are assembled, 15 is a clutch gear meshing with the output gear of the second reduction gear 14, and 16 is relative to the clutch gear 15. It is a clutch cam assembled coaxially. Therefore, the rotation of the motor 11 is decelerated in two stages and transmitted to the clutch cam 16, which causes the clutch cam 16 to rotate.
At the position shown in FIG. 6 (the ice tray 2 is in the horizontal position),
It is made to rotate between the position shown in FIG. 8 (the ice tray 2 is at the maximum twist position). Members 11 to 16 described above
The drive mechanism 10 is configured by the above.

The casing 1 has a first micro switch (first detecting means) 20 for detecting that the ice tray 2 is in a horizontal position, and a first micro switch for detecting that one end of the ice tray 2 is in the maximum twist position. 2 micro switches (second detection means)
And 30 are attached. On the other hand, as shown in FIG.
The clutch cam 16 has three cams 16a, 16b,
16c is formed. Start end cam 16a
Is formed so as to project to a position where the first microswitch 20 is pressed when the ice tray 2 is in the horizontal position shown in FIG. The return cam 16b is formed so as to project at a position that presses the second micro switch 30 when the ice tray 2 is at the maximum twist position shown in FIG. Check cam 16c
Is formed so as to project to a position where the second micro switch 30 is pressed when the ice tray 2 slightly overruns from the horizontal position. Here, the start end cam 16a and the other two cams 16b and 16c are displaced from each other in the axial direction of the clutch cam 16 so that the first micro switch 20 is not pressed by the return cam 16b and the check cam 16c. ing.

The casing 1 is also provided with an ice detecting mechanism 40. The ice detecting mechanism 40 includes the clutch cam 16
Shaft 4 provided in the casing 1 so as to be orthogonal to the axis of the
1, an input arm 42 connected to the outer end of the rotary shaft 41 in a cantilever state, and an output arm 43 provided at the inner end of the rotary shaft 41, and the tip of the input arm 42 is the ice storage device 3 described above.
Has been introduced inside. Therefore, the tip end of the input arm 42 is held at the uppermost position shown by the solid line in FIG. 2 in the standby state, but it is lower than this in the operating state and hits the upper portion of the ice stored in the ice storage device 3 and stops. In this operating state, when the ice storage amount is large, it stops at a position slightly lower than the uppermost position, but when the ice storage amount is small, it stops near the bottom position shown by the chain line in FIG. Further, 44 is a transmission lever, and the transmission lever 44 is rotatably supported around an axis parallel to the axis of the clutch cam 16 in a bearing hole formed in the middle thereof, and the lower end of the transmission lever 44 has the above-mentioned output. It can come into contact with the arm 43. As shown in FIG. 5, a pressing portion 44b that presses the second micro switch 30 is formed on the upper end side wall of the transmission lever 44 so as to project therefrom.

Further, the casing 1 has a detection limiting mechanism 5
0 is provided. That is, as shown in FIG. 5, an engagement protrusion 51 is provided on the upper end side wall of the transmission lever 44. On the other hand, a substantially U-shaped concave groove 52 is formed on the side wall of the clutch cam 16, and the engaging projection 51 is engaged with the concave groove 52. The starting end 52a and the terminating end 52c of the recessed groove 52 are set to such a width that the engaging projections 51 engage with each other with no margin, and the distance from the shaft center of the clutch cam 16 is set to be substantially the same. 44 is kept in a standby state so that the pressing portion 44b does not press the second micro switch 30. On the other hand, the midway portion 52b of the recessed groove 52 is formed wider than the start end 52a and the end end 52c so as to expand outward in the radial direction of the clutch cam 16, and the transmission lever 44 is operated. That is, the pressing portion 44b can press the second micro switch 30. Therefore, the engagement protrusion 5
The 1 and the concave groove 52 allow the operation of the ice detecting mechanism 40 only in a specific section set between the time when one end of the ice tray 2 passes the horizontal position and the time when the ice tray 2 reaches the maximum twist position.

The ice removing device is provided with rotation control means 60 having a CPU. The rotation control means 60 controls the drive mechanism 10 based on the outputs of the first micro switch (first detection means) 20 and the second micro switch (second detection means) 30. The purpose of the control is that when the ice tray 2 rotates from the horizontal position to reach a specific section, if it is determined that the ice storage amount is less than the reference amount, the ice tray 2 rotates to the maximum twist position and then reverses to the horizontal position. The ice tray 2 is immediately reversed to return to the horizontal position and stopped when it is determined that the ice storage amount is larger than the reference amount. Further, the rotation control means 60 is connected to an ice detection timer that counts the detection allowable time T.

Next, the operation of the above embodiment will be described with reference to the time charts of FIGS. 6 to 8 and 9. First, FIG.
Shows the state where the ice tray 2 is held in the horizontal position. In this state, water is supplied from the water supply device to the storage portion of the ice tray 2. At this time, the first micro switch 20 is pushed by the start end cam 16a to be turned on, and the second micro switch 30 is turned off in contact with the base circle. In addition, the transmission lever 44 is provided with a concave groove starting end 52 a of the engaging projection 51.
The pressing portion 44b does not press the second micro switch 30 because it is in the standby state due to the engagement with the input arm 4
The tip of 2 is held at the uppermost position shown by the solid line in FIG.

In this state, when it is determined by the temperature sensor (not shown) that the water in the accommodating portion is frozen, the motor 11 starts to operate for the ice removing operation, and the ice tray 2 rotates counterclockwise in FIG. start. Immediately after the start of rotation, the start end cam 16a is released and the first micro switch 20 is turned off.
It becomes FF, and at this time, the ice detection timer starts counting at the same time.

When the ice tray 2 further rotates and enters the specific section shown in FIG. 7, the motor 11 is temporarily stopped. At this time, the transmission lever 44 is brought into the operating state by the engagement of the engaging projection 51 with the recessed groove midway portion 52b, and the input arm 42 is brought into the operating state to enable ice detection. Here, when the amount of ice storage is small, the input arm 42 descends to the vicinity of the lowermost position, so that the output arm 43 gives the transmission lever 44 a moment to rotate in the clockwise direction in FIG. 2 The micro switch 30 is turned on. When the ice tray 2 further rotates to reach the end of the specific section, the ice detection timer counts up. At this time, since the second micro switch 30 is turned on during the detection allowable time T, it is determined that the ice storage amount is small, and the ice tray 2 is further rotated to continue the ice removing operation as it is. During that time, the rotation of the other end of the ice tray 2 begins to be restricted by a stopper (not shown), so that the ice tray 2 is twisted and released, and the separated ice is collected in the ice storage device 3 and supplemented with ice. At the same time, since the engaging projection 51 enters the groove end 52c, the transmission lever 44 moves to the standby state, the pressing portion 44b does not press the second micro switch 30, and the tip of the input arm 42 is shown in FIG. It is held at the top position shown by the solid line.

When the ice tray 2 reaches the maximum twist position shown in FIG. 8, the second micro switch 30 is pushed by the return cam 16b to be turned on, and the motor 11 is rotated in reverse in response to this. After that, when the ice tray 2 returns to the horizontal position shown in FIG. 6, the first micro switch 20 is pushed by the start end cam 16a and turned on, and in response to this, the motor 11
Stops. When the clutch cam 16 further rotates clockwise in FIG. 6, the second micro switch 30 is pushed by the check cam 16c to be turned on, and appropriate processing is performed in response to this.

On the other hand, in ice detection in a specific section, when the amount of ice storage is large, the input arm 42 stops at a position close to the uppermost position, so that the output arm 43 does not give a moment to the transmission lever 44 and transmits it. The lever 44 floats. Therefore, the pressing portion 44b does not press the second micro switch 30, and the second micro switch 30 remains OFF (see FIG. 10). When the ice tray 2 rotates as it is and approaches the end of the specific section, the count-up of the ice detection timer ends. At this time, since the second micro switch 30 was not turned on during the detection allowable time T, it is determined that the ice storage amount is large, and the motor 11 is immediately reversed in order to terminate the ice removing operation. After that, the ice tray 2 is shown in FIG.
When it returns to the horizontal position shown in (1), the first micro switch 20 is pushed by the start end cam 16a to be turned on, and the motor 11 is stopped in response to this. This prevents ice from overflowing from the ice storage device 3.

Therefore, in the above embodiment, the ice tray 2
Is located in the specific section, the second micro switch 30 is operated by the ice detecting mechanism 40 in accordance with the amount of ice stored in the ice storage device 3.
Is activated and the output signal provides information about the ice storage. Therefore, the number of micro switches is only two, that is, the first and second micro switches, the cost can be reduced, and the entire apparatus can be made compact.

In this embodiment, the microswitch is used as the detecting means, but other sensor such as an optical sensor may be used. Further, although the second detecting means (second micro switch) 30 is operated by the ice detecting mechanism 40, the first detecting means (first micro switch) 20
May be activated.

Furthermore, the specific section may be set in any range as long as one end of the ice tray passes from the horizontal position to before reaching the maximum twist position. However, when one end of the ice tray is in the horizontal position and in the maximum twist position, it is not included in the specific section.

[0023]

As described above, in the ice removing device of the ice making machine of the present invention, since information regarding the amount of ice stored in the ice storage device can be obtained from any of the detecting means for position detection, the ice depending on the amount of ice storage. The number of detecting means is only required for horizontal position detection and maximum twist position detection, while ensuring the function of appropriately replenishing the device, cost can be reduced, and the entire device can be made compact.

[Brief description of the drawings]

FIG. 1 is a rear view of an ice removing device with a casing back plate removed.

FIG. 2 is a vertical sectional side view of the ice removing device,

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is a front view of a clutch cam,

FIG. 5 is a rear view of the transmission arm,

FIG. 6 is a rear view of the ice removing device showing a main part when the ice tray is in a horizontal position.

FIG. 7 is a rear view of the ice removing device showing an essential part when the ice tray is in a specific section,

FIG. 8 is a rear view of the ice removing device showing the main part when the ice tray is in the maximum twist position.

FIG. 9 is a time chart explaining the operation of the motor, the first and second micro switches, and the ice detection timer when the amount of ice storage is small.

FIG. 10 is a time chart similar to FIG. 9 when the amount of ice storage is large.

[Explanation of symbols]

 2 Ice tray 3 Ice storage device 10 Drive mechanism 20 First detection means 30 Second detection means 40 Ice detection mechanism 50 Detection limit mechanism 60 Rotation control means

Claims (1)

(57) [Claims] 1. An ice making device for an ice making machine, wherein both ends of an ice tray are supported, one end of which is rotated by a drive mechanism at a predetermined angle, and rotation of the other end is restricted in the middle of the predetermined angle so that the ice tray is twisted. In the rotation operation of the clutch cam of the drive mechanism,
More, a first detecting means for detecting that the ice tray is in a horizontal position, and the second detection means for detecting that one end of the ice tray is in the maximum twisting position, the second depending on the ice of the ice storage unit
The ice detection mechanism that activates the detection means and the crack that allows the ice detection mechanism to operate only in a specific section that is set between the time when one end of the ice tray passes the horizontal position and the time when it reaches the maximum twist position.
The detection limit mechanism installed on the Chicam and the detection permission in the same section
Ice detection timer that counts the amount of time and when the detection is allowed
Based on the output of the second detection means during the interval, when one end of the ice tray reaches the specific section, the ice tray is rotated toward the maximum twist position or reversed toward the horizontal position according to the ice storage amount. An ice removing device for an ice making machine, comprising: a rotation control unit that determines whether or not the drive mechanism is controlled.