JP2586198Y2 - Cam control mechanism of 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 a cam control mechanism of an ice making machine, and more particularly, to ice making water in an ice making chamber defined inside a water tray, and a plurality of ice making projections provided on the lower surface of an ice making substrate. In an ice maker that is immersed and forms an inverted dome-shaped ice block around the ice making projection as the ice making operation proceeds, the water tray is tilted and returned to a horizontal position, and deicing is promoted during deicing operation. Supply and stop of hot gas to the evaporating tube and supply and stop of ice making water reduced by the ice making operation are preferably achieved by a series of cam operations accompanying the movement of the actuator motor driving the water tray tilting mechanism, and controlled. The present invention relates to a cam control mechanism that realizes simplification of the system and reduction in manufacturing cost.

[0002]

2. Description of the Related Art In an automatic ice maker for continuously producing a large number of ice blocks such as ice cubes, many types are proposed as ice making methods, and an appropriate method is adopted according to the application. For example, a large number of partition plates are arranged vertically and horizontally to define a large number of ice making compartments that open downward, and ice making water is jetted and supplied from the water tray arranged below to the corresponding ice making compartments to freeze. Sprinkling ice making water from below into these ice making compartments without using a closed-cell type ice machine or ice tray that forms ice cubes in each ice making compartment cooled by the evaporator tube connected to the system. Thus, an open-cell type ice maker that forms ice cubes in each of the small chambers, and ice making water flowing down from above one side of an ice maker plate placed upright, thereby forming a kamaboko-shaped ice block on the surface of the ice maker plate. 2. Description of the Related Art There are known a large number of water-fall type ice makers.

Each of the above three types of ice making machines is provided with an ice making water tank for storing a required amount of ice making water, and the ice making water in the tank is pumped by a pump to make the ice making room or the upright of the ice making unit. A forced circulation mechanism is employed in which ice water that has been supplied to the ice making plate and has not been frozen is recovered in the tank and then sent out again to the ice making unit. Therefore, these ice machines require additional equipment such as an ice making water tank and a pump for circulating the ice making water, which complicates the configuration, increases the production cost, and contributes to an increase in size. On the other hand, ice making water is stored in a water dish at a required level, and an ice making projection projecting from the lower surface of an ice making substrate provided with an evaporating tube is immersed in the ice making water, so that the ice making projection is formed. A simple ice maker in which an ice block is formed has already been proposed. In this ice machine,
An ice maker that has a simplified structure and can reduce manufacturing costs because it does not require a mechanism for circulating the ice making water between the water tray and the ice making water tank during the ice making operation. Has the advantage that it can be manufactured.

[0004]

As described above, a simple ice maker in which ice blocks are formed around the projections only by immersing a large number of ice-making projections that are cooled and held in ice-making water in a water dish is simple. Although there is a great advantage that can be obtained as a configuration, the fact is that the control system is not necessarily simplified. That is, the ice making machine alternately repeats the ice making cycle and the deicing cycle, and needs to supply ice making water at the start of the ice making cycle. When the ice making cycle is completed, the water tray must be tilted and then stopped at the required angular position, and then hot gas must be supplied to the evaporator tube to promote the falling of the ice blocks frozen on the ice making projections under their own weight. . Then, after the ice block falls, it is necessary to stop the hot gas supply to the evaporating tube and switch to the refrigerant supply, raise the tilted water tray to return to the horizontal position, and start the ice making cycle again. There is. Therefore, in order to control these series of operations, various sensor groups and a complicated control circuit configuration are required, and despite the simplification of the mechanical configuration, it can contribute significantly to the reduction of the overall manufacturing cost. Absent,
There is a disadvantage that.

[0005]

[Purpose of the present invention] The present invention involves immersing an ice making projection cooled by an evaporating tube in ice making water stored in an ice making chamber in a water dish.
In view of the above-mentioned drawbacks inherent in an ice machine that forms an ice block around the ice making projections, it has been proposed to preferably solve this problem, in which the water tray is tilted and returned to a horizontal position. The supply / stop of hot gas to the evaporator tube during the deicing operation and the supply / stop of ice making water reduced by ice making can be suitably achieved by a series of cam operations driven by an actuator motor for tilting a water tray. It is an object to provide a cam control mechanism.

[0006]

[0007]

SUMMARY OF THE INVENTION In order to overcome the above-mentioned problems and achieve the intended object, a cam control mechanism according to the present invention includes an evaporating tube connected to a refrigeration system having a compressor, a condenser, and the like. An evaporating tube is provided on the upper surface, an ice making substrate having a plurality of ice making units on the lower surface, and a pivot fixed to a main body fixed to the ice making machine main body so as to be tiltable and always maintain a horizontal posture. made Do that from the water dish so as to supply the ice-making water in the
An ice unit is provided, and when ice making water freezes on the ice making section to form an ice block, the water tray is tilted obliquely downward to release the ice block, and then the water tray is returned to the horizontal position again. In the ice making machine configured as described above, a first cam plate, a second cam plate, and a third cam plate are coaxially arranged at required intervals on a rotation shaft of an actuator motor that tilts, lowers, and returns the water tray. , These first cam plate, second
A first switch, a second switch, and a third switch, each of which is provided with a cam operation at a required timing in accordance with the rotation of the actuator motor, corresponding to each of the cam plate and the third cam plate, are disposed on a fixed side. The first cam plate and the first switch control at least a tilt stop and a return stop of the water tray by the actuator motor, and the second cam plate and the second switch cause hot gas to be supplied to the evaporating pipe during the deicing operation. The third cam plate and the third switch control opening and closing of the hot gas valve for supplying ice water to the ice making chamber during the return operation of the water tray. Is controlled.

In order to overcome the problems and achieve the intended object, a cam control mechanism according to another invention of the present application comprises an evaporating pipe connected to a refrigeration system having a compressor, a condenser, and the like, and the evaporating pipe includes: An ice making substrate provided on the upper surface and having a plurality of ice making portions on the lower surface, and is always pivotally supported so as to be able to tilt and freely maintain a horizontal position, and supply ice making water to an ice making chamber defined inside. When the ice making water freezes on the ice making part to form an ice block, the water tray is tilted obliquely downward to release the ice block, and then the water tray is again placed in the horizontal position. In the ice making machine configured to return to the rising position, a cam plate formed with a first cam portion and a second cam portion is disposed on a rotating shaft of an actuator motor that tilts, lowers and returns the water tray. Corresponding to each of the first cam portion and the second cam portion, A switch and a switch that are provided with a cam operation at a required timing with the rotation of the actuator motor are disposed on a fixed side, and the first cam portion and the switch are configured to at least stop the tilting and return of the water tray by the actuator motor. Control and de-icing
Hot gas valve for supplying hot gas to the evaporator tube during rotation
And the second cam portion and the switch are configured to control the opening of a water supply valve for supplying ice making water to the ice making chamber during the returning operation of the water tray.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a cam control mechanism for an ice making machine according to the present invention.

[0010]

First Embodiment (Schematic Configuration of Ice Making Machine) FIGS. 7 and 8 are sectional views schematically showing the overall configuration of an ice making machine employing a cam control mechanism according to the first embodiment. It is a perspective view. The inside of the casing 10 constituting the ice making machine main body is a lower machine room 14 in which a refrigerating machine such as the compressor CM and the condenser 18 is stored, and is located above and enclosed by a heat insulating material, and is opened and closed by a door 26. Freely closed ice storage 12
And an ice making unit 2 disposed above the ice storage 12
It is basically composed of 0. Ice making unit 20
As will be described later with reference to FIGS. 4 and 5, a water tray 24 for storing ice-making water at a predetermined level and an ice-making substrate 34 having ice-making projections 36 immersed in the ice-making water are provided. When the operation mode is switched to the deicing operation, the ice making water is tilted at a predetermined angle to discharge the ice making water in the water tray 24 to the outside through the drainage receiving portion 28 and the drainage pipe 30 and to discharge the ice blocks to the ice storage 12. It has become.

(Ice Making Unit) FIG. 5 shows a detail of the ice making unit 20 in a longitudinal section. The water tray 24 has the shape shown in FIGS. 4 and 6, and is defined inside. The ice making water can be stored in the ice making chamber 32 at a predetermined level. That is, the ice making chamber 32 includes a rectangular bottom surface 24a of the water tray 24,
Walls 24b, 24c, 24d, 24e standing upright on all sides
And upright walls 24 facing each other in the short direction.
Support pieces 50, 50 are attached to the outside of d, 24e, respectively. As shown in FIG. 6, the support piece 50 provided on the upright wall 24d has a cam piece 50a that bends and projects obliquely downward at a position separated from the water tray 24.
A cam groove 54 composed of a long hole is bored, and a cam follower 56 projecting from an eccentric position of a cam disk 58 described later slidably faces the cam groove 54. In addition, the water tray 2 of each support piece 50
A protruding piece 49 protrudes from the bent portion deviating from 4, and the turning shaft 52 is inserted through a through hole formed in the protruding piece 49. The pivot 52 is fixed to the main body of the ice making machine, and the water tray 24 is moved around the pivot 52 under the action of a cam associated with the rotation of the actuator motor AM connected to the cam disk 58 in FIG. As shown in FIG. 15, tilting can be performed diagonally downward and returned diagonally upward.

(Refrigeration System) FIG. 9 shows a schematic configuration of a refrigeration system used in an ice maker.
The vaporized refrigerant compressed by the compressor CM is liquefied by the condenser 18 through the discharge pipe 33, dehumidified by the dryer 35, and decompressed by the capillary 37. And the evaporating tube 22
, And expands at once, and exchanges heat with the ice making substrate 32 to cool each ice making projection 36 to below freezing. The vaporized refrigerant evaporated in the evaporating pipe 22 and the unevaporated liquefied refrigerant are:
In a gas-liquid mixed phase state, the gas flows into the accumulator 39 to be separated into gas and liquid. The gas-phase refrigerant returns to the compressor CM via the suction pipe 41, and the liquid-phase refrigerant is stored in the accumulator 39. Further, the hot gas pipe 43 branched from the discharge pipe 33 of the compressor CM is connected to the evaporating pipe 22 through a hot gas valve HV.
It is connected to the entrance side. The hot gas valve HV is opened during the deicing operation, and the high temperature refrigerant (hereinafter referred to as “hot gas”) discharged from the compressor CM flows through the hot gas pipe 43.
Each ice block is dropped by its own weight by heating each ice making projection 36 by bypassing to the evaporating tube 22 through. The hot gas flowing out of the evaporating pipe 22 heats and evaporates the liquid-phase refrigerant retained in the accumulator 39, and returns the refrigerant as a gas-phase refrigerant from the suction pipe 41 to the compressor CM again. Note that reference numeral FM in the drawing indicates a fan motor for the condenser 18.

(Regarding Drainage Structure of Water Tray) As shown in FIGS. 5 and 6, the water tray 24 has a water discharge passage for discharging the ice making water in the ice making chamber 32 to the outside when the water tray 24 is tilted. Is formed. That is, a drain chute 38 that extends obliquely downward is integrally formed on the lower surface of the water tray 24. Receiving part 28
Is disposed above the inside of the ice storage 12 (see FIG. 7).
The vertical wall surface of the water tray 24 in the longitudinal direction (the side opposite to the side on which the swivel support shaft 52 is disposed) is connected to the blocking plate 4 as apparent from FIG.
The water tray inner wall 24c is formed of the water tray 24 so as to surround the dam plate 42 from above.
Are integrally formed. The lower open end of the water dish inner wall 24c is located above the bottom surface of the water dish 24 with a slight gap therebetween. Therefore, as shown in FIG. 5, the ice making water reaches the dam plate 42 via the lower open end of the water tray inner wall 24c, overflows from the upper end surface of the dam plate 42, and can be discharged to the drain chute 38. Has become. In other words, the ice making water stored in the ice making chamber 32 is maintained at a predetermined level by the dam plate 42. When the operation is switched to the deicing operation described later, the water tray 24 tilts obliquely downward and discharges the ice making water via the drain chute 38 as shown in FIG. At the position where the water tray 24 stops tilting, a part of the ice making water remains as it is by the dam plate 42 (see FIG. 14), and this remaining water is supplied to the ice making water supply pipe 6 for the next ice making operation.
The water can be mixed with the water replenished from step 8 to promote the temperature reduction of the ice making water as a whole.

An ice making substrate 3 is provided above the inside of the housing 10.
4 is horizontally disposed and fixed, and on the upper surface of the ice making substrate 34,
Evaporation tube 22 derived from a refrigeration system housed in machine room 14
Are arranged in a meandering manner. On the lower surface of the ice making substrate 34, a number of ice making projections 36 are provided so as to hang down at required intervals, and during the ice making operation, the ice making projections 36 are attached to the water tray 24.
It is immersed in ice making water stored in the area. By the operation of the refrigeration system, heat exchange with the refrigerant is performed in the evaporating tube 22, and the ice making projections 36 are cooled and kept at 0 ° C. or less. As a result, as shown in FIG. 70 will be formed.

(Regarding the Cam Control Mechanism) As shown in FIG. 1, a first cam plate 13, a second cam plate 15 and a third cam plate 17 are coaxially arranged at required intervals on a rotating shaft 11 of the actuator motor AM. It is arranged. On the fixed side of the ice making machine, a first switch SW ₁ , a second switch SW _2, and a third switch S are provided corresponding to the first cam plate 13, the second cam plate 15, and the third cam plate 17, respectively.
W ₃ is arranged, giving cam operated at predetermined timing in accordance with the rotation of the actuator motor AM, the motor AM
, The opening and closing of the hot gas valve HV, and the opening and closing of the water supply valve WV for replenishing ice making water are controlled, respectively. That is, the first cam plate 13 is formed of a disk having a required diameter, and two concave portions 13a and 13b are formed around the first cam plate. The roller portion of the lever member 19 extending from the first switch SW _1, together with contact with the circumference of the first cam plate 13, so may be settled at a required timing the respective recesses 13a, and 13b ing. In this case, the two concave portions 13a and 13b are not provided opposite to each other at a position of 180 ° sandwiching the center of the first cam plate 13, but are formed with a required central angle as shown in the figure. The one with the larger central angle on the circumferential surface connecting these recesses 13a, 13b is A ₁
Assuming that the smaller central angle is A ₂ , the circumferential surface A ₁ is a cam surface on the side that controls the tilt of the water tray 24, and the circumferential surface A ₂ is the rising and returning of the water tray 24 as described later. Is the cam surface on the side that controls. The first switch SW ₁ is connected to the first relay X ₁ as shown in the control circuit of FIG. 2, and controls the tilt stop and the return stop of the water tray 24 by the actuator motor AM as described later. Note that the first cam plate 13 to the timing of the cam operations of the first switch SW _1, shown in the timing chart of FIG.

A second cam plate 15 also formed of a circular disk has a circumferential surface having a central angle of about 270 °, and a second switch SW _2.
The roller portion of the lever piece 21 extending from the cam plate 15
And settles at a required timing on a concave surface having a central angle of about 90 °. This second
Switch SW ₂ is connected to the second relay X ₂ as shown in FIG. 2, the opening and closing of the normally open contact X ₂ -a which cooperates therewith for controlling the opening-closing of the hot gas valve HV (described later) . The third cam plate 17 has a circumferential cam surface having a required center angle, and
Rollers of the lever piece 23 extending from the switch SW ₃ is adapted to be in contact with the circumference of the cam plate 17. When the third switch SW ₃ of the lever piece 23 is brought into contact with the cam surface, ON operation of the switch is made.
The third switch SW ₃ is connected to a third relay X ₃ as shown in FIG. 2, and opens and closes the water supply valve WV by opening and closing the normally open contact X ₃ -a ₁ cooperating therewith. Control (described later). These second cam plate 15 and the second switch SW ₂ and the third cam plate 17 to the timing of the cam operation of the third switch SW _3, shown in the timing chart of FIG.

(Wobble Plate) An L-shaped wobble plate 44 is swingably disposed inside the ice making chamber 32 of the water tray 24, and is driven to swing up and down by rotation of a swing motor RM. It has become so. That is, as shown in FIG. 6, in particular, the swing plate 44 made of a horizontal plate having a vertical rising portion 45 has a large number of through holes 46 formed at required intervals on the surface thereof. The peripheral dimension of the swing plate 44 is set slightly smaller than the internal size of the bottom surface 24 a in the ice making chamber 32, and the swing support shaft 48 is inserted into a curved hole formed at the upper end of the rising portion 45. Both ends of the swing shaft 48 are inserted into through holes 53a of a projecting piece 53 projecting from supporting pieces 50 provided on both outer side walls of the water tray 24, respectively. In a state where the swing plate 44 is pivotally supported by the swing support shaft 48, the swing plate 44 is closely mounted on the bottom surface of the ice making chamber 32 as shown in FIG.

As shown in FIG. 6, an upright piece 59 is formed integrally with the lateral edge of the swinging plate 44, and an engaging pin 61 extends horizontally from the upright piece 59. FIG. 4
The rocking motor RM shown in FIG. 6 is provided inside the main body of the ice making machine so as to be able to move up and down slightly as described later,
2 is engaged with the engaging pin 61 of the rocking plate 44 from below.
It is possible to leave. Therefore, when the rocking motor RM is rotated in the counterclockwise direction, the engaging pieces 62 rotate in a state of being engaged with the engaging pins 61 as shown in FIG. While raising the required distance,
As shown in FIG. 11, when the engaging piece 62 is disengaged from the engaging pin 61, the swing plate 44 falls to the bottom of the ice making chamber 32 by its own weight. That is, if the rocking motor RM is rotated during the ice making operation, the rocking plate 44 repeatedly swings up and down inside the ice making chamber 32 around the rocking support shaft 48, thereby constantly moving the ice making water. Can be. The swing plate 44 has a through hole 46.
Are provided, the ice making water flows up and down through the through holes 46, and a more active movement is obtained. However, the through hole 46 is not indispensable, and may be omitted as necessary. Further, the swinging plate 44 is tilted integrally with the tilting of the water tray 24 during a de-icing operation described later. A stopper 63 extending horizontally from the body 10 is exposed. The rocking plate 44 is separated from the water plate 24 by engaging the engaging pin 61 with the stopper 63 while the rocking plate 44 is tilted together with the water plate 24, and the tilting posture thereof is changed. It is kept constant.

(Switch S for detecting completion of ice making and deicing)
W ₄ , Th) As shown in FIGS. 4 and 5, the rocking motor RM includes:
It is disposed so as to be able to move up and down slightly via a mounting jig 25 provided inside the main body of the ice making machine, and always faces the upper limit position.
When a required external force is applied to the motor RM, the motor body can be lowered by a required stroke. Also the lowering locus of the motor RM, for example, faces the ice making completion detecting lever piece 27 of the switch SW ₄ to a micro switch, to with the lowering of the rocking motor RM in contact, it becomes possible bias of the switch I have. That is, as will be described later with reference to FIG. 12, when the ice making operation proceeds and the ice mass 70 grows around the ice making projection 36, the rocking plate 44 comes into contact with the ice mass 70 when the rocking plate moves upward, and the engaging pin Swinging motor R via the engaging piece 61 and the engaging piece 62
M will be given a downward reaction force. Therefore, the rocking motor RM starts descending from the upper limit position, and during the descending process, the lever piece 2 of the ice making completion detection switch SW ₄
By pressing the switch 7, the switch is turned ON to detect the completion of ice making in the ice making unit 20. Also, as shown in FIGS.
On the upper surface of the ice making substrate 34 at 0, a thermo switch Th for detecting completion of deicing is provided, and is turned on by a sudden rise in temperature when the ice block 70 falls from the ice making projection 36.
In operation, the actuator motor AM is rotated as described later.

(Example of Electric Control Circuit) FIG. 2 shows an electric control circuit of the automatic ice maker according to the first embodiment. In the figure, between the connection point D and the power supply line R, a fuse F and an ice storage detection switch SW ₅ is interposed in series, the compressor CM is connected between the connection point D and the line T I have. Also between the connecting point D and the line T, the first switch SW ₁ and the relay X ₁ for the actuator motor AM shown in FIG. 1, the second switch SW ₂ and the relay X ₂ for hot gas supply shown in FIG. 1 the third switch SW ₃ and the relay X ₃ for the ice making water supply shown in FIG. 1, the ice making completion detecting switch SW ₄ and the relay X ₄ shown in FIG. 4 are interposed in series s husband. Further, a timer T for controlling the driving of the rocking motor RM in a timed manner is provided. One terminal of the timer T is connected to the line T, and the other terminal is connected to the relay X _3.
Is connected to a connection point D via a normally open contact X ₃ -a ₂ .
Note that the normally open contact X ₃ -a _2, the second normally open contact T-a ₂ timer T is inserted in parallel, so that can make the self-hold.

One terminal of the actuator motor AM is connected to a line T, and the other terminal of the motor AM is a normally open contact X ₄ -a of the relay X _{4 and} a normally open contact X ₄ -a of the relay X _{1. 1-} a, connection point D via a parallel connection element comprising the thermoswitch Th for detecting the completion of deicing
It is connected to the. Furthermore between the connection point D and the line T, the first normally open contact T-a _1, normally open hot gas valve HV and the relay X ₂ for hot gas supply of the timer T and the rocking motor RM A contact X ₂ -a, a water supply valve WV for supplying ice making water, and a normally open contact X ₃ -a _{1 of the} relay X ₃ are interposed in series.

[0022]

Next, the operation of the cam control mechanism according to the first embodiment will be described with reference to the timing chart shown in FIG. Prior to the ice making operation, the water tray 24 is always kept in a horizontal attitude as shown in FIG. The supply and stop of the ice making water from the ice making water supply pipe 68 is controlled by controlling the opening and closing of the water supply valve WV by the cam action of the third cam plate 17 and the third switch SW ₃ as described later. Done. Even if it is supplied a little more, the ice making water in the ice making chamber 32 overflows the dam plate 42 as described above, and the drain chute 3
8 and discharged to the outside through the drainage receiving section 28.

A refrigerant is supplied to the evaporating tube 22 from a refrigerant circulation pipe of a refrigerating system, and the heat exchange action of the refrigerant causes the ice making substrate 3 to cool.
The cooling of the ice making projection 36 protruding from 4 is started. Since the ice making projection 36 is immersed in ice making water, the projection 3
12 starts to grow and gradually grows, as shown in FIG.
As shown in the figure, an inverted dome-shaped ice block 70 is formed. During the ice making operation, the swing motor RM, which is timed by the timer T, continues to rotate. Therefore, the engagement piece 62 provided on the rotation shaft of the motor RM engages with the engagement pin 61 provided on the upright piece 59, and lifts the rocking plate 44 upward as shown in FIG. When the engagement piece 62 is detached from the engagement pin 61, the swing plate 44 falls by its own weight and comes into contact with the bottom surface 24a of the ice making chamber 32 as shown in FIG. As described above, the rocking plate 44 repeatedly rocks in the ice making water in the ice making chamber 32 during the ice making operation, whereby the ice making water is constantly moved. In addition, since the through hole 46 is formed in the swing plate 44, the swing plate 4
With the swing of 4, the ice making water passes through the through hole 46, and this makes the movement of the ice making water more active with the jet phenomenon.
Since the ice making water is always kept in the dynamic state, the ice blocks 70 formed on the ice making projections 36 are prevented from becoming cloudy, and transparent and clear ice blocks 70 are obtained.

As shown in FIG. 12, when a complete ice block 70 is formed in an inverted dome shape on the ice making projection 36, the rocking plate 44
Comes into contact with the ice block 70 at the time of upward movement thereof, and finally exerts a downward reaction force on the rocking motor RM via the engagement pin 61 and the engagement piece 62. Therefore rocking motor RM is starts decreasing from the upper limit position, the lever piece 27 of the ice-making completion detecting switch SW ₄ is operated pressed to ON, thereby detecting the ice completion of ice making unit 20. Then the energized relay X ₄ shown in FIG. 2, the normally open contact X ₄ -a cooperating therewith is closed to start the rotation of the actuator motor AM. Therefore, the cam disk 5
8 rotates clockwise, and the cam follower 56 eccentrically arranged therewith slides on the cam groove 54 formed on the cam piece 50a, whereby the water tray 24 starts to tilt obliquely downward. Due to this tilt, the ice making water in the ice making chamber 32 is drained by the drain chute 3 through the water tray inner wall 24c and the dam plate 42.
And discharged from the drain chute 38 to the drain receiving portion 28.
Released to Note the first lever member 19 of the switch SW ₁ shown in Figure 1, immediately before the start of rotation of the actuator motor AM, but are settled in the recess 13a of the first cam plate 13, the start of rotation of the motor AM rides on the circumferential surface a _1, is oN actuate the switch SW _1. Therefore the relay X ₁ is energized, the normally open contact X ₁ cooperating therewith -
a is closed. Therefore, the reaction force is released for rocking motor RM by tilting the water tray 24, the even ice completion detection switch SW ₄ is turned OFF operation, the normally open contact X ₁ -
By closing a, the rotation of the actuator motor AM is continued.

[0025] When the said recess 13b provided on the first cam plate 13 comes to the first lever member 19 of the switch SW _1, the switch SW ₁ is deenergized relay X ₁ and OFF operation, which the co The working normally open contact X ₁ -a is opened. Therefore, the water tray 24 stops tilting at the position where the required tilt angle shown in FIG. 14 is reached. At this time, a part of the ice making water remains in the inside of the ice making chamber 32 after being blocked by the dam plate 42. Since the remaining water is sufficiently cooled by the previous ice making operation, the next ice making is performed. The temperature of the whole ice making water can be lowered by mixing with fresh ice making water supplied for operation. In addition, the tilting of the water plate 24 causes the
The ice block 70 formed around is exposed while being attached to the projection 36. Further, the rocking plate 44 is also tilted integrally with the tilting of the water tray 24, so that the engagement pin 61 is disengaged from the engagement piece 62 of the rocking motor RM. In the process of stopping the tilting of the water tray 24, as shown in FIG. 14, the engaging pin 61 of the rocking plate 44 is locked by the stopper 63. The oscillating plate 44 is located obliquely above the bottom surface 24a. The rocking plate 44 functions as a slide chute for guiding the ice block 70 to the ice storage 12 when it falls.

[0026] In the process the water tray 24 to perform the tilting, the lever piece 21 extending from the second switch SW _2, a second
A concave surface having a central angle of about 90 ° in the cam plate 15 arrives,
The switch SW ₂ by ON operation, biases the second relay X ₂ shown in FIG. As a result, the normally open contact X ₂ -a cooperating with the relay X ₂ is closed to open the hot gas valve HV, and as shown in the timing chart of FIG. It is supplied to the evaporation tube 22. Thereby, the ice making projections 36 are rapidly heated via the ice making substrate 34. Therefore, the connection between the ice making projection 36 and the ice block 70 is released, and the ice block 70 falls by its own weight. Then, it slides down the upper surface of the swinging plate 44 held in a required inclined posture by the stopper 63, and is guided and discharged into the ice storage 12 located diagonally below.

The falling of the ice block 70 causes the ice making substrate 34
Is released, and the temperature of the substrate 34 rises at once due to the flow of the hot gas in the evaporating tube 22. This temperature rise is detected by the thermoswitch Th and is immediately turned ON to restart the rotation of the actuator motor AM. Therefore, the cam disk 58,
Under the action of the cam follower 56 and the cam groove 54, the cam piece 50
a rotates counterclockwise about the pivot 52, and the water tray 24 rotates counterclockwise to start returning to the horizontal position. Further, with the restart of the rotation of the motor AM, the second cam plate 15 also restarts its rotation, and the lever piece 21 extending from the second switch SW ₂ rides on the circumferential cam surface of the second cam plate 15. It is OFF actuate the switch SW _2. Therefore the second relay X ₂ is deenergized in FIG. 2, the normally open contact X ₂ -a which ₂ cooperates said relay X is to close the hot gas valve HV is opened again. Therefore, the supply of the refrigerant to the evaporating pipe 22 is restarted. Furthermore, the circumferential cam surface of the third cam plate 17 by the rotation resumption of the motor AM is, come to the third switch SW ₃ of the lever piece 23, turning ON operation of the switch.
Thereby, the third relay X ₃ shown in FIG. 2 is energized, the normally open contact X ₃ -a ₁ cooperating with the third relay X ₃ is closed, the water supply valve WV is opened, and ice making water is supplied to the ice making chamber 32. . The third cam plate 17, when detached from the third switch SW _3, the switch is de-energized the third relay X ₃ to OFF operation, a normally open contact X ₃ -a ₁ is opened for cooperation with this To close the water supply valve WV to stop the supply of ice making water.

The first cam settled in the recess 13b of the first cam plate 13 with the rotation of the actuator motor AM.
Lever member 19 of the switch SW ₁ biases the relay X ₁ rides on the cam surface of the circumferential surface A ₂ side, the normally open contact X ₁ -a
Is closed, the electric current is supplied to the motor AM by overlapping with the thermo switch Th. As mentioned earlier,
This is because the ice making substrate 34 is re-cooled by the supply of the refrigerant to the evaporating tube 22, and the thermoswitch Th is closed immediately thereafter. When the said other recess 13a by the rotation of the first cam plate 13 comes to the first lever member 19 of the switch SW _1, the switch SW ₁ is opened and the normally open contact X relay X ₁ is deenergized Release _1- a. Thereby, the rotation of the actuator motor AM is stopped, and the water tray 24 is stopped in the horizontal posture.

When the third switch SW ₃ for opening and closing the water supply valve WV is turned on, the normally open contact X ₃ -a ₂ cooperating with the relay X ₃ is closed. Is energized. When the required time set in the timer T elapses, the _first normally open contact Ta-1 cooperating therewith is closed to rotate the rocking motor RM, and the rocking plate 44 during the ice making operation is rotated. Resume vertical swing. Timer T
The second normally open contact Ta- ₂ is closed, and the timer T is self-held. When the time set in the timer T times out, the first normally open contact T-a ₁ and a second normally open contact T
-a ₂ was opened to stop the rotation of the swing motor RM.

[0030]

Second Embodiment (Schematic Configuration of Ice Making Machine) FIGS. 17 and 23 are sectional views schematically showing the overall configuration of an ice making machine employing a cam control mechanism according to a second embodiment. It is a perspective view. For convenience of description, “front and rear” and “left and right” are referred to when the ice maker is viewed from the front. The interior of a housing 110 constituting the ice making machine main body includes a lower machine room 112 in which a refrigerating machine such as a compressor CM and a condenser 111 is housed, and is located above and surrounded by a heat insulating material, and has an ice storage room therein. The ice storage unit 114 basically includes a box-shaped ice storage unit 114 defining an 183, and an ice making unit 115 disposed above the ice storage unit 114. The ice making unit 115 includes a water tray 116 for storing ice making water at a predetermined level, as described later with reference to FIGS.
And an ice making board 118 provided with ice making projections 117 immersed in the ice making water. The ice block 121 can be discharged to the outside via the receiving portion 119 and the drain pipe 120, and can be discharged to the ice storage chamber 183. The ice storage unit 114 is provided with an ice block discharging device 113 to be described later, and is configured to discharge the ice blocks 121 stored in the ice storage chamber 183 by the device 113 to the outside.

(Regarding External Structure of Housing) As shown in FIG. 23, the housing 110 includes a main frame 122 surrounding the above-described members, and a frame 122.
And a front panel 123 disposed on the front of
As a whole, it has a slim shape with extremely short width. The front panel 123 is formed of a synthetic resin in the shape shown in the figure, and is provided at a substantially intermediate position in the height direction thereof with a discharge port 114 of an ice block 121 formed in the ice storage box 114.
The opening 123a corresponding to a is opened downward (see FIG. 17). A container-like mounting table 124 is detachably mounted below the opening 123a, and a receiver such as a cup is mounted on the mounting table 124 when the ice block 121 is taken out. A large number of slits 124a are formed on the upper surface of the mounting table 124 so as to prevent water drops falling from the discharge port 114a from being collected and soiling the surroundings. Front panel 1 extending above opening 123a
23 has a power lamp L and a sixth switch S for discharging ice blocks.
Pushbutton 125 W ₆ is disposed, pusher button 12
5, while the switch SW ₆ is turned on, the ice block discharging device 113 is operated to release the ice blocks 121 stored in the ice storage chamber 183 into the discharge port 114 a and the opening 12.
It is set to emit through 3a.

An opening (not shown) communicating with the lower machine chamber 112 is formed on the bottom surface of the casing 110, and the opening is formed in the filter member 1 detachably mounted on the casing 110.
26. The filter member 126 functions to collect dust in the outside air introduced into the machine room 112 for air cooling of the condenser 111, and to prevent a decrease in cooling capacity due to clogging of the condenser 111. The filter member 126 is configured to be easily attached and detached from the front side of the housing 110.

(Cover Body) As shown in FIG. 17, a cover body 127 is detachably provided on the front surface of the ice storage box 114, and the water tray 116 of the ice making unit 115 is An actuator motor AM for tilting, a motor RM for rocking a rocking plate 128 (described later), and a motor GM for discharging the ice block discharging device 113 are collectively provided. Cover body 1
Maintenance of each of the motors AM, RM, GM and the members attached thereto can be easily performed by removing the front panel 123. When assembling the automatic ice maker, the cover 127 is provided with the motors AM, RM, and GM arranged on the cover 27 in advance.
Can be attached to the front surface of the ice storage 114, so that there is an advantage that the time required for assembly can be reduced.

(Regarding the Ice Making Unit) FIG. 19 shows the details of the ice making unit 115 in a vertical section. The water tray 116 has the shape shown in FIG. The ice making water can be stored at a predetermined level therein. That is, the ice making chamber 129 is provided with the rectangular bottom surface 116 of the water tray 116.
a and the walls 116b, 116c, 11 upright on all sides.
6d and 116e, and a plurality of shaft supports 130 are integrally formed along the longitudinal direction outside the upright wall 116e located on the right side in FIG.
The shaft support 130 stores the ice making substrate 118 in the ice storage 114
Is rotatably inserted into a through hole 132 a provided in a bracket 132 suspended and supported above the inside of the water tray 116, and rotates the water tray 116 in the short direction (the width direction of the ice making machine) around the shaft support portion 130. It is configured to be possible (see FIG. 21). An ice making water supply pipe 149 is detachably provided at an appropriate position of the ice making board 118 so that a water supply valve WV is opened at a later-described timing to supply a predetermined amount of ice making water to the ice making chamber 129. (See FIG. 34).

Further, a square hole 130a is formed in the shaft support portion 130 located on the front side, and a turning support shaft 13 to be described later is formed therein.
A square shaft 133a protruding from the shaft end of No. 3 is inserted. The turning support shaft 133 is rotatably supported by the cover body 127. With the rotation of the actuator motor AM disposed on the cover body 127, the water tray 116 is rotated about the shaft support 130. , As shown in FIGS.
It can be tilted downward and returned upward. As described above, by arranging the water tray 116 to tilt in the width direction of the ice maker, the width of the ice maker can be shortened as described above.

(About the tilting mechanism of the water tray) The shaft support 13 of the water tray 116 in the cover body 127
0, a cylindrical bearing portion 134 protruding toward the front side is protruded, and the through hole 13 formed in the bearing portion 134 is provided.
The turning support shaft 133 is rotatably inserted into 4a, and a square shaft 133a protruding from the shaft end is fitted into a square hole 130a of the shaft support portion 130. Further, a lever piece 133b extending in the radial direction is integrally formed at an end portion on the front side of the turning support shaft 133, and an engagement protrusion 133c protrudes from the front side of the lever piece 133b. 16 and 18
As shown in the figure, a cam formed of a disk having a required diameter with a part cut in the circumferential direction is provided on a rotating shaft extending to the front side of the bracket 135 in the actuator motor AM disposed on the cover body 127 via the bracket 135. The plate 136 is arranged to rotate integrally. One end of a connecting rod 137 is eccentrically pivotally supported on the front surface of the cam plate 136, and a lever piece 133b formed on the turning support shaft 133 is engaged with a long hole 137a formed at the other end of the connecting rod 137. Projection 133c
Are slidably fitted. Therefore, by rotating the actuator motor AM, the turning support shaft 33 reciprocates at a required angle via the cam plate 136 and the connecting rod 137, and thereby the water tray 116 is tilted.

In addition, at the front end of the engaging projection 133c,
An elliptical restricting portion 133d that can be inserted into the elongated hole 137a of the connecting rod 137 is disposed so as to extend in the radial direction with respect to the projection 133c, and the engaging projection 133c is inserted through the elongated hole 137a. The connecting rod 137 is configured not to easily come off from the engaging projection 133c. Further, by allowing the lever piece 133b to move by the length of the elongated hole 137a with respect to the connecting rod 137, an error in the position of the lever piece 133b and the connecting rod 137 when the tilting of the water tray 116 is stopped, which will be described later, is allowed. It has become. Further, a mounting jig 13 on which the rocking motor RM is disposed on the back side of the lever piece 133b.
Torsion spring 139 for urging 8 in a predetermined direction (all described later)
An engagement piece 133e with which one end is engaged protrudes.

(Regarding drainage structure of water tray) As shown in FIGS. 19 and 24, the water tray 116 has
When the water tray 116 is tilted, a water discharging portion for discharging ice making water in the ice making chamber 129 to the outside is formed. That is, water dish 1
An auxiliary chamber 146 recessed toward the rear side is defined in the vicinity of the tilting lower end side of the upright wall 116c located on the rear side of the rear wall 16 and has a predetermined length outside the auxiliary chamber 146 (rear side). A drain pipe 147 is connected for communication. Below the drainage pipe 147, a drainage receiving section 1 that receives the discharged water and discharges it to the outside is provided.
19 is formed on the rear side of the ice storage 114. The auxiliary chamber 146 and the ice making chamber 129 are defined by a dam plate 148 lower than the upright wall 116c.
Therefore, the ice making water supplied to the water tray 116 is
8 overflows from the upper end surface and can be discharged to the drainage receiving portion 119 via the drainage pipe 147. In other words, the ice making water stored in the ice making chamber 129 is kept at a predetermined level by the dam plate 148. When the operation is switched to the deicing operation described later, as shown in FIG.
Numeral 16 tilts obliquely downward to discharge ice making water via a drain pipe 147. At the position where the water tray 116 stops tilting, a part of the ice making water remains as it is by the dam plate 148.
(Refer to FIG. 30) This residual water can be mixed with water supplied from the ice making water supply pipe 149 for the next ice making operation to promote the temperature drop of the ice making water as a whole.

The drain pipe 147 also serves as a stopper that contacts the edge of the drainage receiving portion 119 on the ice storage chamber side when the water tray 116 is tilted obliquely downward, and holds the water tray 116 in a tilted state. Function. Also, at this time, the pivot 133
Is movable, it is possible to prevent a load from being applied to the tilting mechanism even if there is a deviation between the tilt stop position of the water tray 116 and the rotation stop position of the actuator motor AM.

An ice making board 118 is horizontally disposed and fixed above the ice storage 114 via a plurality of brackets 132.
An evaporating tube 131 derived from a refrigeration system housed therein is arranged in a meandering manner. Further, a number of ice making projections 117 are provided on the lower surface of the ice making board 118 so as to hang down at required intervals, and the ice making projections 117 are immersed in ice making water stored in the water tray 116 during an ice making operation. ing. By the operation of the refrigeration system, heat exchange with the refrigerant is performed in the evaporating tube 131, and the ice making projection 117 is cooled and kept at 0 ° C. or lower.
As shown in the figure, an ice block 121 is gradually formed. A plurality of through holes 118a are formed in the ice making board 118 so as to improve heat exchange efficiency and achieve weight reduction.

(Regarding the Cam Control Mechanism) As shown in FIG. 20, a first cam portion 150 and a second cam portion 151 are provided on the back surface of the cam plate 136 provided on the actuator motor AM, facing the bracket 135. It is formed so as to be deviated in the radial direction. Bracket 13
5 includes the first cam portion 150 and the second cam portion 151.
And respectively corresponding to the seventh switch SW ₇ and the ninth switch SW ₉ is disposed, at predetermined timing in accordance with the rotation of the actuator motor AM giving camming tilting stop and return the water tray 116 by the motor AM Stopping, opening of the hot gas valve HV, and opening and closing of the water supply valve WV for replenishing ice making water are respectively controlled. That is, the first cam portion 150 and the second cam portion 151 are formed by arc-shaped projections having a required radius and projecting in the axial direction. Then, the lever piece 152 extending from the seventh switch SW ₇ comes into contact with the first cam portion 150 and the first cam portion 150
At a required timing. The lever piece 152 of the seventh switch SW ₇ is
When the switch comes into contact with 0, the switch is turned ON. With the seventh switch SW ₇ is connected to the relay X ₂ and the actuator motor AM, as shown in the control circuit of FIG. 25, controls the tilting stop the return stop of the water tray 116 by the actuator motor AM, as described later, the hot gas The opening of the valve HV is controlled (described later). The first cam portion 150
If the timing of the cam operation of the seventh switch SW _7, shown in the timing chart of FIG 34.

A lever piece 153 extending from the ninth switch SW ₉ comes into contact with the second cam portion 151 and separates at a required timing. And the ninth
When the lever member 153 of the switch SW ₉ is brought into contact with the cam portion 151, ON operation of the switch is made. The ninth switch SW ₉ is connected to the water supply valve WV, as illustrated in FIG. 25, controls the opening of the water supply valve WV (described later). And the second cam portion 151 of the timing of the cam operations of the ninth switch SW _9, shown in the timing chart of FIG 34.

(Regarding the Swinging Plate and Swinging Mechanism) Inside the ice making chamber 129 of the water tray 116, an upright wall 116d which is the lower end (left side) of the tilting of the water tray 116 in the rectangular bottom plate 154a is provided. 3 excluding opposing sides
A rocking plate 154 having vertical rising portions 154b, 154c, 154d formed on the sides is swingably disposed, and is driven to rock vertically by rotation of a rocking motor RM. In the bottom plate 154a and the right rising portion 154b of the rocking plate 154, a large number of circular or square through holes 155 are formed on the surface thereof at required intervals. The peripheral dimension of the rocking plate 154 is set to be slightly smaller than the internal dimension of the bottom surface 116a in the ice making chamber 129, and the projections 156, 156 formed on both sides in the upper longitudinal direction of the rising portion 154b are attached to the water tray 116. Pins 157, 15
7 to be rotatably supported. In a state where the swing plate 154 is pivotally supported on the water plate 116, the swing plate 154 is
As shown in (2), it is placed in close contact with the bottom surface of the ice making chamber 129. In addition, the drilling position of the through hole 155 drilled in the bottom plate 154a is set so as to reach between the adjacent ice making projections 117, 117.

As shown in FIG. 16, an inverted L-shaped engaging piece 158 is formed integrally with a rising portion 154c located on the front side of the swinging plate 154, and an upper horizontal portion 158a of the upper horizontal portion 158a serves as an upright wall 116b of the ice making chamber 129. Extending beyond. A long hole 127a extending in the vertical direction is formed at a position corresponding to the upper horizontal portion 158a of the cover body 127, and a swing member 159 rotated by the swing motor RM is slid in the long hole 127a. It is movably inserted. An oscillating projection 159a is eccentrically provided at a position facing the back side of the cover member of the oscillating member 159, and can be engaged with and disengaged from below on the upper horizontal portion 158a of the oscillating plate 154. . Therefore, when the swing member 159 is rotated counterclockwise, the swing projection 159a rotates in a state of being engaged with the upper horizontal portion 158a as shown in FIG.
The swing plate 154 is raised by a required distance from the bottom surface of the ice making chamber 129, and the swing projection 159a is moved upward by the upper horizontal portion 158.
a, the oscillating plate 154 is moved by its own weight into the ice making chamber 129.
Fall to the bottom of That is, if the rocking motor RM is rotated during the ice making operation, the rocking plate 154 repeatedly swings up and down inside the ice making chamber 129 around the pins 157 and 157, thereby constantly moving the ice making water. Can be.
Since the rocking plate 154 is provided with a through hole 155, the ice making water flows up and down or left and right through the through hole 155, and a more active movement is obtained.

Further, the rocking plate 154 tilts integrally with the tilting of the water tray 116 during a de-icing operation described later.
An upright piece 160 extending upward from the ice making board 118 is formed on the right rising portion 154b of the rocking plate 154. While the rocking plate 154 is tilted together with the water tray 116, the upright piece 160 is moved to the ice making substrate 118.
The rocking plate 154 is moved to the
, And its tilting posture is kept constant (see FIG. 30).

(Regarding the Mounting Structure of the Swing Motor RM) As shown in FIGS. 16 and 20, the mounting jig 13 having a flat plate shape is mounted on the bearing 134 projecting from the cover 127.
8 is rotatably supported, and the rocking motor RM is disposed on the front side near the end of the mounting jig 138 that is separated from the pivotal support. A motor RM is connected to a cam portion 159b of a swinging member 159 protruding from the through hole 127a to the front side. Further, a projecting piece 13 is provided on the front side of the mounting jig 138 facing between the pivot portion and the swing motor RM.
8a is formed, and the lower end of the protruding piece 138a is
4, one end 139a of the torsion spring 139 is engaged. An engaging piece 133e formed on the lever piece 133b faces close to the protruding piece 138a,
The other end 139b of the torsion spring 139 is engaged with the upper end of the engagement piece 133e. When the water tray 116 is supported in a horizontal posture, the upper end of the engaging piece 133e extends above the upper end of the projecting piece 138a of the mounting jig 138, as shown in FIG. Therefore, at this time, the mounting jig 138 is always urged to rotate clockwise about the bearing 134 as a fulcrum under the elasticity of the torsion spring 139. When a required external force is applied to the swing motor RM, the mounting jig 138 is moved to the bearing portion 13.
It can rotate by a required angle around the fulcrum 4.

That is, the torsion spring 139 allows the swinging projection 159 a of the swinging member 159 to engage with the engaging piece 158 of the swinging plate 154 while the water tray 116 holds the horizontal posture during the ice making operation. Functions to hold in a possible operating position. Further, the operation is switched from the ice making operation to the deicing operation, and the water tray 11 is switched.
6 is tilted, the upper end of the engaging piece 133e of the lever piece 133b becomes a protruding piece 138 of the mounting jig 138.
In this case, the end 139b of the torsion spring 139 is engaged with the upper end of the projecting piece 138a (see FIG. 33). Therefore, when the water tray 116 is tilted, the torsion spring 139 does not apply an urging force to the mounting jig 138.

A vertically extending elongated hole 138b is formed at an end of the mounting jig 138 which is separated from the pivotal support.
A regulating pin 161 protruding from the elongated hole 138b corresponding to the cover body 127 is slidably inserted. The regulating pin 161 functions to regulate the range of rotation of the mounting jig 138. Under the elasticity of the torsion spring 139, the lower end of the elongated hole 138b always comes into contact with the regulating pin 161 and the swinging member is rotated. 159 to the operating position (FIG. 26).
reference).

(Switch S for detecting completion of ice making and deicing)
W ₁₀ , Th ₁ ) A tenth switch SW ₁₀ for detecting completion of ice making, such as a micro switch, is provided on the
70, the lever piece 162 faces the downward locus of the cam portion 159b of the swinging member 159, and comes into contact with the cam portion 159b as the mounting jig 138 (swing motor RM) rotates. In contact therewith, the switch can be switched. That is, as described later with reference to FIG. 27, when the ice making operation proceeds and the ice blocks 121 grow around the ice making projections 117, the rocking plate 154 moves upward when the ice blocks 121 move upward.
As a result, a downward reaction force is applied to the swing motor RM via the engagement piece 158 and the swing projection 159a. For this reason, the mounting jig 138 on which the rocking motor RM is disposed rotates counterclockwise about the bearing portion 134 as a fulcrum.
There by pressing the lever member 162 of the tenth switch SW _10, it is capable of detecting the ice completion of "a" is switched to "b" side from the side ice making unit 115 contacts the switch SW _10. Note the bracket 170 is positioned adjustably arranged in the vertical direction with respect to the cover body 127, adjustably configured to position of the lever pieces 162 of the tenth switch SW ₁₀ by vertically adjusting the bracket 170 . Thereby, the size of the ice block 121 formed on the ice making projection 117 can be changed.

[0050] Here, the 10 switch SW ₁₀ is contact "b"
When the rocking motor RM is stopped at the same time as switching to the side, the rocking projection 159a abutting on the engagement piece 158 of the rocking plate 154 prevents the rocking plate 154 from tilting. Therefore, in the second embodiment, the cam portion 159 of the swing member 159 is provided.
the b, switchable notch contact "a" side of the tenth switch SW ₁₀ in a state where the swing motor RM is pivoted 159c
The notch 159c is used to control the swing projection 159a to be separated from the tilt locus of the engagement piece 158. Also, this cutout portion 159c, the case that faces the spaced apart position from the upper horizontal portion 158a of the rocking protrusion 159a is engagement piece 158, with a positional relationship facing the position corresponding to the lever piece 162 of the tenth switch SW ₁₀ It is formed on the cam portion 159b. That is, after the ice making completion detecting switch SW ₁₀ by the rotation of the rocking motor RM is switched to the contact "b" side by rotating the motor RM, notch 159c lever piece of the switch SW ₁₀ 16
The contacts of the switch SW ₁₀ when arriving at a position corresponding to 2 when switched to "a" side to set to stop the swing motor RM. As a result, the swing projection 159
“a” is separated from the tilting locus of the engagement piece 158 in the swinging plate 154, and does not hinder the tilting of the swinging plate 154.

As shown in FIG. 19, the ice making unit 1
On the upper surface of the ice making substrate 118 at 15, thermoswitch Th ₁ for detecting the deicing completion is provided.
The thermo-switch Th ₁ is switched to the contact "b" when the ice making substrate 118 is lowered to a predetermined temperature by the ice making operation, also a rapid increase in temperature at which ice pieces 121 is dropped from the ice making projections 117 by the deicing operation Upon detection, the contact is set to be switched from “b” to “a”. At this time, the hot gas valve HV is closed as described later,
The actuator motor AM is rotated.

(Regarding Ice Block Discharge Apparatus and Ice Storage Completion Detection Switch) A motor GM for discharging ice blocks is disposed below the front surface of the cover body 127, and a screw 163 for discharging ice blocks driven by the motor GM includes It is arranged to extend into the ice storage room 183. As shown in FIG. 17, the projecting end of the screw 163 is rotatably inserted into a concave portion 164 formed at a position corresponding to the ice storage 114 and is set to rotate at a fixed position. The discharge motor GM rotates only while the sixth switch SW ₆ is turned on by pressing the push button 125 disposed on the front panel 123,
The ice block 121 stored in the ice storage chamber 183 is transported to the discharge port 114a by the screw 163.

As shown in FIG. 17, on the back surface of the cover body 127, a regulating plate 165 that rotatably hangs, corresponding to the position of the screw 163 and facing the ice storage chamber from the position where the discharge port 114a is formed. Has been established. This regulating plate 16
5 is the ice block 12 conveyed by the screw 163.
1 to release the discharge port 114a and release the ice block 12a.
In addition, when the ice block discharger 113 is stopped, it returns to the initial position and closes the discharge port 114a to prevent outside air from entering the ice storage chamber 183 through the discharge port 114a. It works to do. In addition, the regulating plate 16
5, a separating plate 168 is disposed on the cover body 127. The separating plate 168 prevents the ice blocks 121 stored in the ice storage chamber 183 from being discharged from the discharge port 114a, and is transported by the screw 163. A part of the ice block 121 is returned to the ice storage chamber 183 and functions to prevent the discharge port 114a from being clogged. A discharge pipe 169 is provided at the bottom of the ice storage 114 near the position where the recess 164 is formed.
Is arranged to discharge the molten water from the ice block 121 to the outside of the refrigerator.

A detection plate 166 is rotatably supported on the lower surface of the water tray 116. The detection plate 166 always has its open end side with respect to the bottom surface of the water tray 116 as shown in FIG. It is held in a state of being separated downward. An eighth switch SW ₈ for detecting the completion of ice storage is provided on the front surface of the water tray 116, and a lever piece 167 of the switch SW ₈ has a protrusion 166 a formed at the front end of the detection plate 166.
Is always pressed. When the detection plate 166 is rotated clockwise with respect to the water tray 116 by the contact of the detection plate 166 with the ice block 121 in the process of tilting the water tray 116, the protruding piece 166 a is separated from the lever piece 167 and the switch is turned off. SW ₈ is turned ON to detect the completion of ice storage. The protruding piece 16 of the detection plate 166
The 6a, by setting so as to abut the lever member 167 of the eighth switch SW ₈ during non-detection of the ice pieces 121,
When the detection plate 166 falls off the water tray 116 for some reason, the automatic ice maker is stopped, so that it is possible to prevent the production of the ice block 121 in a state where the detection of the completion of the ice storage cannot be performed.
Further, the open end of the detection plate 166 is formed in a comb-teeth shape to reduce the load applied when the detection plate 166 comes into contact with the ice block 121.

(Example of Electric Control Circuit) FIG. 25 shows an electric control circuit of an automatic ice maker according to the second embodiment. In the figure, a fuse F is inserted between a power supply line R and a connection point D, and the connection point D and the line T
Is connected to the power supply lamp L. Similarly, a sixth switch S for discharging ice blocks is provided between the connection point D and the line T.
W ₆ and the discharge motor GM, the actuator motor AM
Seventh switch SW ₇ and the eighth switch SW ₈ and the relay X ₁ for ice storage completion detection of use are interposed in series s husband.
The seventh switch SW ₇ and the ice storage completion detection switch SW ₈
Between the connection point K and a connection point E between, interposed the normally closed contact X ₁ -b ₁ for the relay X _1, between the connection point K and the line T, the relay X _2, ice ninth switch SW ₉ a water supply valve WV for water supply, normally open contacts X ₃ -a ₁ and the actuator motor AM relay X ₃ are interposed in series s husband.

The normally closed contact X ₁ -b _{2 of} the relay X ₁ connected in series with the fuse F and the normally open contact X ₃ of the relay X ₃ are connected.
between the connection point N between -a ₁ and the actuator motor AM, the normally closed contact X ₃ -b for the normally closed contact X ₂ -b ₁ and the relay X ₃ of the relay X ₂ is interposed in series I have. Fan motor FM for the condenser 111 is connected to the contact a side of the thermal switch Th ₁ for deicing completion detector which is connected to the normally open contact X ₂ -a series of relay X _2, hot to the contact b A hot gas valve HV for gas supply is connected. Furthermore, relay X
_The relay X _{3 is connected} between the normally closed contact X ₁ -b ₂ and the line T.
Normally open contacts X ₃ -a ₂ and normally closed contact X ₂ -b ₂ of the rocking motor RM and a relay X _2, R relay SR and the compressor CM is inserted in series s husband. And relay X ₃
Tenth switch SW ₁₀ for ice completion detection to a connection point P between the normally open contact X ₃ -a ₂ and the rocking motor RM is connected to the protection to the contact "a" side of the switch SW ₁₀ Thermo Th _Two
And the relay X ₃ are connected in series, and the contact “b” side is connected to the connection point D. Note that a parallel with the fan motor FM and the relay X _3.

[0057]

Next, the operation of the cam control mechanism according to the second embodiment will be described with reference to the timing chart shown in FIG. (Regarding Initial Operation) When a power switch of an automatic ice maker (not shown) is turned on, the power lamp L is turned on and the compressor CM is started to supply the refrigerant to the evaporating pipe 131. Relays X ₁ and X
_2, X the normally closed contacts of the _{3 X 1 -b 2, X 2} -b 1, X 3 the actuator motor AM via -b is rotated, the water tray 116 held in a horizontal position tilting the obliquely downward Begin to. After the ninth switch SW ₉ by the rotation of the motor AM is turned OFF operation, the seventh switch SW ₇ is actuated ON, closed the normally open contact X ₂ -a which relay X ₂ cooperates therewith is energized , the relay X ₃ through a thermoswitch Th ₁ is energized. As a result, the actuator motor AM continues to rotate through the normally open contact X ₃ -a ₁ cooperating with the relay X _3, and the water tray 1
16 returns to the horizontal posture without stopping the tilting. The relay X ₃ is a normally open contact X ₃ -a ₂ cooperating therewith.
Is self-holding.

When the water tray 116 returns to the required position, the ninth switch SW ₉ is turned on to open the water supply valve WV, and the ice making chamber 129 in the water tray 116 is iced through the ice making water supply pipe 149. Water is supplied. The water dish 116
Means that the upright wall 116d side exceeds the horizontal posture
e is tilted clockwise to a position higher than e, and then tilted counterclockwise again to stop in a horizontal position, so that ice making water is reliably stored in the ice making chamber 129 by a preset amount. Is done. Further, the ice making water in the ice making chamber 129 supplied to the somewhat large amount overflows the dam plate 148 as described above, and flows into the auxiliary chamber 146 and the drain receiving section 11.
9 to the outside.

With the rotation of the actuator motor AM,
By the seventh switch SW ₇ is turned OFF operation, the motor AM is stopped to rotate, the water tray 116 is stopped in a condition that a horizontal posture. The normally closed contact of the relay X ₂ cooperates is by X ₂ -b ₂ is closed, the rocking motor RM starts rotating. Further, the seventh switch SW
_{When 7} is turned off, the water supply valve WV is closed and the supply of ice making water is stopped. However, the ninth switch SW ₉
Hold the ON state.

(Regarding the Ice Making Operation) The refrigerant is supplied from the refrigeration system circulation pipe to the evaporating tube 131 by the compressor CM which is energized by turning on the power, and the refrigerant is projected on the ice making substrate 118 by the heat exchange action. The cooling of the ice making projection 117 is started. This ice making projection 11
Since 7 is immersed in ice-making water, ice formation starts around the projection 117 and gradually grows to form an inverted dome-shaped ice block 121. During the ice making operation, the rocking motor RM keeps rotating. Therefore, the swing projection 15 of the swing member 159 rotated by the motor RM
9a engages with the engaging piece 158 provided on the rising portion 154c to lift the swinging plate 154 upward as shown in FIG. When the swing projection 159a is disengaged from the engagement piece 158, the swing plate 154 falls under its own weight and falls in the ice making chamber 129.
Abuts on the bottom surface 116a. As described above, the rocking plate 154 repeatedly rocks in the ice making water in the ice making chamber 129 during the ice making operation, whereby the ice making water is constantly moved. Moreover, since the through hole 155 is formed in the swinging plate 154, the ice making water passes through the through hole 155 with the swing of the swinging plate 154, and this causes the movement of the ice making water with the jet flow phenomenon. Be more active. Since the ice making water is always kept in a dynamic state, the ice blocks 121 formed on the ice making projections 117 are prevented from becoming cloudy, and transparent and clear ice blocks 121 are obtained.

(Regarding Deicing Operation) As shown in FIG.
Is formed in an inverted dome shape, the rocking plate 154 comes into contact with the ice block 121 when the rocking plate moves upward, and finally the rocking plate 154 is moved downward by the rocking motor RM via the engaging piece 158 and the rocking projection 159a. To give the reaction force to the side. Accordingly, the mounting jig 138 on which the rocking motor RM is disposed starts to rotate counterclockwise around the bearing portion 134 as a fulcrum.
The lever member 162 of the tenth switch SW ₁₀ for ice completion detection by the cam portion 159b of the rocking member 159 is pressed by switching the contact from the "a" side to the "b" side, thereby ice in the ice making unit 115 Detect completion. Then the self-holding of the relay X ₃ shown in FIG. 25 is released by de-energized, the normally closed contact X ₃ -b which cooperates with this by closing, starts rotation of the actuator motor AM. Therefore, the cam plate 136 rotates counterclockwise, and the lever piece 133b of the turning support shaft 133 that engages with the connecting rod 137 eccentrically connected thereto is tilted counterclockwise, so that the water tray 116 It starts to tilt obliquely downward (see FIG. 29). This tilt makes the ice making room 1
The ice making water in 29 is supplied to the auxiliary chamber 1 through the dam plate 148.
46, and is discharged from the auxiliary chamber 146 to the drainage receiving portion 119. Note in the process of the water tray 116 is tilted, second ninth switch SW ₉ by the cam portion 151 of cam plate 136 is rotated by the actuator motor AM is OFF operated (see Figure 34).

[0062] Here, the rocking motor RM, the lever piece 162 of the tenth switch SW ₁₀ for ice completion detection is pressed by the cam portion 159b of the swinging member 159 contacts "b"
Be switched to the side, in the rotation continues (the seventh switch SW ₇ is turned OFF, the normally closed contact of the relay X ₂ X ₂ -b ₂
Is closed). Thereby, the swing member 15
Rocking protrusion 159a provided on 9 is separated from the upper horizontal portion 158a, the mounting jig 138 is rotated in the clockwise direction by the elastic force action of the torsion spring 139, the contact of the tenth switch SW ₁₀ from the "b" side " a "side, and the rocking motor RM temporarily stops. However, with the rotation of the pivot 133 in the counterclockwise direction, the upper end of the engaging piece 133e of the lever piece 133b becomes the protruding piece 138a of the mounting jig 138.
Is moved downward from the upper end of the torsion spring 139, and the end 139b of the torsion spring 139 is engaged with the upper end of the projecting piece 138a, so that no spring force acts on the mounting jig 138 (FIG. 3).
3 (b)). Then, the mounting jig 138 starts rotating counterclockwise around the bearing portion 134 as a fulcrum by its own weight,
The switching contact of the tenth switch SW ₁₀ by the cam portion 159b again from "a" side to the "b" side, to rotate the rocking motor RM. The notch 159 formed in the cam 159a
When c has arrived at the position corresponding to the lever piece 162, it is released pressing of the lever pieces 162 contact of the switch SW ₁₀ is by switches from "b" side to the "a" side, rocking motor RM Stops the rotation (see FIG. 33 (c)). Thus, the swing projection 159a provided on the swing member 159 stops at a position separated from the tilt locus of the engagement piece 158 in the swing plate 154, and prevents the tilt of the swing plate 154 from being hindered. Is done.

The first plate provided on the cam plate 136
When the cam portion 150 comes to the lever piece 152 of the seventh switch SW _7, the relay X ₂ the switch SW ₇ is operated ON
To open the normally closed contact X ₂ -b ₁ cooperating therewith and close the normally open contact X ₂ -a. In this case, the thermostatic switch Th ₁ for detecting the deicing completion ice protrusion 11
7 are connected to the contact “b” side by the generation of ice blocks 121. Accordingly, the relay X ₃ is not energized,
The actuator motor AM stops rotating, and the water tray 116 is stopped.
Stops tilting at the position where the required tilt angle shown in FIG. 30 is reached. At this time, a part of the ice making water remains in the ice making chamber 129 after being blocked by the blocking plate 148.
Since the residual water has been sufficiently cooled in the previous ice making operation, it can be mixed with fresh ice making water supplied for the next ice making operation to lower the temperature of the whole ice making water.
In addition, due to the tilting of the water tray 116, the ice block 121 formed around the ice making projection 117 is exposed while being attached to the projection 117. Further, in the process of stopping the tilting of the water tray 116, the upright pieces 160 of the rocking plate 154 abut on the ice making board 118, so that the water tray 116 stops tilting more than the bottom surface 116 a of the ice making chamber 129 of the water tray 116. Rocking plate 15
4 is located diagonally above. This rocking plate 154
Functions as a sliding chute for guiding the ice block 121 to the ice storage chamber 183 when it falls.

Simultaneously with the stop of the actuator motor AM, the hot gas valve HV is opened, and hot gas is supplied to the evaporating pipe 131 instead of refrigerant as shown in the timing chart of FIG. Thereby, the ice making substrate 11
8, the ice making projections 117 are rapidly heated.
Therefore, the connection between the ice making projection 117 and the ice block 121 is released, and the ice block 121 falls under its own weight. Then, it slides down the upper surface of the rocking plate 154 held in a required inclined posture by the upright pieces 160, and is guided and discharged into the ice storage chamber 183 located thereunder.

When the ice blocks 121 fall, the ice making substrate 1
The negative temperature load at 18 is released and the substrate 1
The temperature 18 rises at once due to the flow of the hot gas in the evaporating tube 131. This temperature rise is detected the thermoswitch Th ₁ is immediately by switched to the contact "a" side, the relay X ₃ is energized, normally open contacts X ₃ -a ₁ is closed for cooperation with this Then, the rotation of the actuator motor AM is restarted. Further, the hot gas valve HV is closed, and the supply of the refrigerant to the evaporating pipe 131 is restarted.

When the rotation of the motor AM resumes, the cam plate 13
6. Under the action of the connecting rod 137 and the lever piece 133b, the turning support shaft 133 rotates clockwise, and the water tray 116 similarly rotates clockwise to start returning to the horizontal posture. When the rotation of the motor AM resumes, the second cam portion 1 of the cam plate 136 is moved.
51, as shown in FIG. 31, arrives to the lever piece 153 of the ninth switch SW _9, turning ON operation of the switch. As a result, the water supply valve WV is opened, and ice making water is supplied to the ice making chamber 129.

The first cam portion 150 of the cam plate 136
But when disengaged from the lever piece 152 of the seventh switch SW _7, the switch SW ₇ is turned OFF operation, together with close the water supply valve WV to stop supplying the ice-making water, the actuator motor AM is stopped. This is because the relay X ₃ is self-holding, and opening the normally closed contact X ₃ -b for the relay X _3. Thus, the water tray 116 is stopped in the horizontal posture.

In the second embodiment, when the water tray 116 is returned to the horizontal position, as shown in FIG. 32, the water tray 116 is temporarily moved beyond the horizontal position and clockwise until the inclined open end (the upright wall 116d side) becomes higher. After tilting, it is set to tilt in the counterclockwise direction and stop in a horizontal posture. That is, water dish 1
When the ice making water is supplied to the ice making chamber 129 by an amount that overflows from the blocking plate 148 in a state where the blocking plate 148 provided at 16 is at a high level, the water tray 116 returns to the horizontal posture. Sometimes, the required amount of ice making water is supplied to the ice making chamber 129 without fail. Thereby, it is possible to prevent the occurrence of a problem due to the shortage of the ice making water.

With the rotation of the pivot 133 in the clockwise direction, the upper end of the engaging piece 133e of the lever piece 133b moves upward from the upper end of the protruding piece 138a of the mounting jig 138, and the torsion spring 139 end 139b
Is engaged with the upper end of the engagement piece 133e (see FIG. 33 (a)). As a result, the mounting jig 138 is
Is pivoted clockwise about the pivot 133 as the fulcrum, and the rocking member 159 is brought to an operating position where its rocking projection 159a can be engaged with the engaging piece 158 of the rocking plate 154. I do. Accordingly, when the seventh switch SW ₇ is a relay X ₂ and OFF operation is deenergized, the normally closed contact X ₂ cooperating therewith
-b ₂ is closed by rotating the rocking motor RM, resumes vertical swing of the swing plate 154 during the ice making operation.

In the illustrated embodiment, a configuration is employed in which a large number of inversely tapered ice making projections 36, 117 hang down at predetermined intervals with respect to the ice making boards 34, 118. However, as the ice-making projection, various kinds of members such as a round bar-shaped member and a pin-shaped member can be suitably used as long as it is a core member to be cooled that functions as a so-called ice-making part.

[0071]

As described above, according to the cam control mechanism of the ice making machine according to the present invention, the ice making water in the ice making chamber defined inside the water tray has a large number of ice making projections protruding from the lower surface of the ice making substrate. Immersed in the ice making operation to form an inverted dome-shaped ice block on the ice making projections with the progress of the ice making operation, the stop of the water tray tilt and the stop of the return to the horizontal position, the water tray tilt mechanism This can be suitably achieved by a series of cam operations accompanying the movement of the actuator motor that is the drive source. In addition to stopping the tilting and returning of the water tray, the actuator motor also supplies and stops the supply of hot gas to the evaporator tube to accelerate de-icing during de-icing operation and the supply and stop of ice water reduced by the ice making operation. A series of cam movements accompanying the movement of are performed together. Therefore, the control system of the ice maker can be remarkably simplified in configuration, and it has an excellent effect of greatly contributing to a reduction in the overall manufacturing cost.

Further, a plurality of cam portions are formed on one cam plate, and the stop corresponding to each cam portion is controlled to stop tilting and return of the water tray and to open the water supply valve. The number of points can be reduced and the control system can be simplified.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a cam control mechanism according to a first embodiment of the present invention.

FIG. 2 is a control circuit diagram connected to the cam control mechanism according to the first embodiment.

FIG. 3 is a timing chart of control performed by the cam control mechanism according to the first embodiment.

FIG. 4 is a schematic perspective view showing an ice making unit in which the cam control mechanism according to the first embodiment is employed, in an exploded state.

FIG. 5 is a sectional view of a main part of the ice making unit shown in FIG. 4;

6 is a perspective view showing the water tray shown in FIG. 4 and a rocking plate disposed inside the ice making chamber in an assembled state and an ice making water discharge path in a partially cut-away state.

FIG. 7 is a schematic vertical sectional view of an ice making machine employing the cam control mechanism according to the first embodiment.

8 is a partially cutaway perspective view of the ice making machine shown in FIG.

FIG. 9 is a schematic diagram of a refrigeration system employed in the ice making machine.

FIG. 10 is a cross-sectional view of a main part of the ice making unit shown in FIG. 5, showing a state in which a rocking plate is raised during ice making.

11 is a cross-sectional view of a main part of the ice making unit shown in FIG. 5, showing a state where the swinging plate is lowered during ice making.

FIG. 12 is a cross-sectional view showing a state in which ice making is completed in the ice making unit, and also shows a positional relationship between a cam follower and a cam groove.

FIG. 13 is a longitudinal sectional view showing a state where the water tray starts tilting in the ice making unit and a part of the residual water used for ice making is discharged.

FIG. 14 is a vertical cross-sectional view showing a state in which deicing is performed in a state where the water tray in the ice making unit stops tilting, and the rocking plate is tilted and held slightly above the water tray.

FIG. 15 is a vertical cross-sectional view showing a state where the water tray returns to its original state and stops in the ice making unit, and replenishment of the remaining ice making water with new ice making water is started.

FIG. 16 is an exploded perspective view of a main part of a cam control mechanism according to a second embodiment.

FIG. 17 is a schematic longitudinal sectional view of an ice making machine employing a cam control mechanism according to a second embodiment.

FIG. 18 is a schematic perspective view showing the ice making unit employing the cam control mechanism according to the second embodiment in a partially disassembled state.

FIG. 19 is a sectional view of a main part of the ice making unit shown in FIG. 18;

FIG. 20 is a front view of a main part showing the water tray tilting mechanism and the rocking plate rocking mechanism shown in FIG. 18 in a partially cut-out state.

FIG. 21 is a schematic perspective view showing a state in which the ice making unit shown in FIG. 18 is provided in a housing.

FIG. 22 is a partially cutaway front view of the ice making unit shown in FIG. 18;

FIG. 23 is an external perspective view of an ice making machine according to a second embodiment.

24 is a partially cutaway side view showing a state in which a water tray is tilted in the ice making unit shown in FIG. 19;

FIG. 25 is a control circuit diagram connected to a cam control mechanism according to the second embodiment.

FIG. 26 is an explanatory diagram showing an ice making unit and a corresponding swing mechanism in a state where the swing plate is swinging during the ice making operation of the ice machine according to the second embodiment.

FIG. 27 is an explanatory diagram showing an ice making unit and a corresponding swinging mechanism of the ice making machine according to the second embodiment in a state where ice making is completed.

FIG. 28 is a view showing the ice making unit in the ice making machine according to the second embodiment and the corresponding swing in a state where the swing projection of the swing member is retracted from the tilt locus of the engagement piece in the swing plate and the swing plate; It is explanatory drawing which shows a mechanism.

FIG. 29 is an explanatory view showing an ice making unit in the ice making machine according to the second embodiment in a state where ice making is completed, and a corresponding swing mechanism and tilt mechanism.

FIG. 30 is an explanatory view showing the ice making unit in a state where the water tray of the ice making machine according to the second embodiment has stopped tilting, and the positional relationship between the cam plate of the corresponding tilting mechanism and the seventh and ninth switches. is there.

FIG. 31 is an explanatory view showing the ice making unit in a state where the water tray of the ice making machine according to the second embodiment has started returning, and the positional relationship between the corresponding cam plate of the tilting mechanism and the seventh and ninth switches. is there.

FIG. 32 also shows the ice making unit in a state where the water tray of the ice making machine according to the second embodiment is tilted beyond the horizontal attitude, and the positional relationship between the cam plate of the corresponding tilting mechanism and the seventh and ninth switches. FIG.

FIG. 33 shows a process in which the swing mechanism of the swing plate of the ice making machine according to the second embodiment detects the completion of ice making and retracts the swing projection of the swing member from the tilt locus of the engagement piece in the swing plate. FIG.

FIG. 34 is a timing chart of control performed by the cam control mechanism according to the second embodiment.

[Explanation of symbols]

13: first cam plate, 15: second cam plate, 17: third cam plate 18, 111: condenser, 20, 115: ice making unit,
22, 131: evaporating tubes 24, 116: water dish, 32, 129
... Ice making room, 34,118 ... Ice making substrates 36,117 ... Ice making projections, 44,154 ... Swing plate, 52 ... Spinning shaft 61 ... Second
Engagement means (engagement pin), 62 first engagement means (engagement piece) 7
0, 121: ice block, 136: cam plate, 150: first cam portion 151: second cam portion, AM: actuator motor,
CM: Compressor HV: Hot gas valve, WV: Water supply valve, RM
... Swing motor, SW ₁ ... First switch, SW ₂ ... Second switch, SW ₃ ... Third switch SW ₄ ... Ice making completion detection switch, SW ₇ ... Seventh switch, SW ₉ ... Ninth switch T
h, Th ₁ ... de-icing completion detection thermo

Claims (4)

(57) [Scope of request for utility model registration] An evaporating pipe (22) connected to a refrigeration system including a compressor (CM), a condenser (18), and the like, and the evaporating pipe (22) is disposed on an upper surface and a plurality of evaporating tubes are provided on a lower surface. An ice making board (34) having an ice making section (36) and a pivot (52) fixed to the ice making machine main body are pivotally supported so as to be tiltable, and always maintain a horizontal posture. water was so as to supply water tray (24) because Do that ice making unit
(20) wherein the the ice making unit (36) the ice-making water is frozen into ice blocks (70) is formed, said water tray (24) is tilted obliquely downward to release the ice lumps (70) Then, in the ice making machine configured to raise and return the water tray (24) to the horizontal posture again, a first cam is attached to a rotating shaft of an actuator motor (AM) for tilting and lowering and returning the water tray (24). Plate (13), the second cam plate (15) and the third cam plate (1).
7) are arranged coaxially at a required interval, and the actuator motor (AM) is arranged corresponding to each of the first cam plate (13), the second cam plate (15) and the third cam plate (17). ), A first switch (SW ₁ ), a second switch (SW ₂ ), and a third switch (SW ₃ ) that are provided with a cam operation at a required timing at a required timing are disposed on a fixed side, and the first cam The plate (13) and the first switch (SW ₁ )
At least a tilt stop and a return stop of the water tray (24) by the actuator motor (AM) are controlled, and the second cam plate (15) and the second switch (SW ₂ )
Controlling the opening and closing of a hot gas valve (HV) for supplying hot gas to the evaporating pipe (22) during the deicing operation, wherein the third cam plate (17) and a third switch (SW ₃ )
A cam control mechanism for an ice making machine, characterized in that it controls opening and closing of a water supply valve (WV) for replenishing ice making water to the ice making chamber (32) during the returning operation of the water tray (24). . 2. A rocking plate (44) housed in the ice making chamber (32) so as to be rockable, and a rocking plate disposed outside the water tray (24) and slidable up and down. Operating motor (RM)
An ice making detection switch (SW ₄ ) facing the movement trajectory of the rocking motor (RM), a first engaging means (62) provided on the rocking motor (RM), and the rocking plate ( 44) and a second engageable with the first engagement means (62).
The ice making unit (61) when the swing motor (RM) swings the swing plate (44) via the first and second engagement means (62, 61). The rocking plate (44) comes into contact with the ice block (70) formed on the rocking motor (36), and the rocking motor (RM)
When a reaction force is applied to the motor, the motor (RM) is moved in a required direction to operate the ice making detection switch (SW ₄ ) to detect the completion of ice making in the ice making part (36), thereby detecting the actuator. ice maker of the cam control mechanism according to claim 1, wherein biasing the motor (AM) initiates the tilting of the water tray (24). 3. increase the return of the water tray (24), said steel <br/> deicing completion detecting thermo which is disposed in the ice unit (20) (T
ice maker of the cam control mechanism according to claim 1, wherein the initiated by the detection operation of h). 4. An evaporating pipe (131) connected to a refrigeration system having a compressor (CM), a condenser (111) and the like, and the evaporating pipe (131) is disposed on an upper surface and a plurality of evaporating tubes are provided on a lower surface. An ice making board (118) provided with an ice making part (117), and is always pivotally supported so as to be able to tilt and freely maintain a horizontal posture, so that ice making water is supplied to an ice making chamber (129) defined therein. When the ice making water freezes around the ice making part (117) to form an ice block (121), the water tray (116) is tilted obliquely downward to tilt the ice block (116). 121), and then raises and returns the water tray (116) to the horizontal position again. A rotating shaft of an actuator motor (AM) for tilting, lowering and returning the water tray (116) The first cam part (150) and the second cam A cam plate (136) having a portion (151) is provided, and the rotation of the actuator motor (AM) corresponding to each of the first cam portion (150) and the second cam portion (151). Accordingly, a switch (SW ₇ ) and a switch (SW ₉ ) to which a cam operation is given at a required timing are disposed on a fixed side, and the first cam portion (150) and the switch (SW ₇ ) are provided at least by the actuator The tilting stop and return stop of the water tray (116) by the motor (AM) are controlled, and the opening of a hot gas valve (HV) for supplying hot gas to the evaporating pipe (131) during the deicing operation is controlled. The second cam part (151) and the switch (SW ₉ ) are connected to the ice making chamber (129) during the return operation of the water tray (116).
A cam control mechanism for an ice making machine, characterized in that the opening of a water supply valve (WV) for replenishing ice making water is controlled.