JPS6023653Y2 - ice making device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an ice-making device for making ice cubes, and more specifically, it makes ice by solidifying water sprinkled on the bottom surface of a plate-shaped ice-making plate with an evaporator coil.
Several ice cubes are configured to remove ice from the ice-making plate using hot gas, and the plate-shaped ice removed from the ice-making plate is cut by a cutting heater, and the ice cubes are stored in a water reservoir below the heater. The present invention relates to an improvement of an ice-making device constructed as described above.

As a conventional means for detecting ice removal in this type of ice making device, a thermo switch is known to detect the temperature and thereby detect ice removal, but the cutting means uses outside air. The drawback was that ice-off detection was extremely unstable because it was affected by temperature.

That is, the outside temperature varies greatly depending on the season, resulting in a difference of about 30 to 6 inches when converted to ice making time, making the detection operation of conventional ice removal detection means based on temperature extremely unstable.

Furthermore, since the cutting heater in the conventional device is constantly energized, it consumes a large amount of power, resulting in a disadvantage that the cutting heater is unavoidably wasted.

In addition, the structure is such that electricity is supplied to the cutting heater even when the ice-making cycle and the ice-removal cycle are stopped, so when the water storage is full of cube ice, the cube ice in the water storage There is a drawback that the ice cubes are heated by the heat from the cutting heater, causing the ice cubes to melt and waste rice to be produced.

Therefore, by mechanically detecting ice break-off, the present invention can perform stable ice-free detection unaffected by outside temperature, and can also detect when the water tank is full using a bottle switch inside the water storage tank. If detected, when placing the ice on the cutting heater, turn on the ice removal detection switch to energize the heater, and when the ice on the cutting heater is cut and fallen and the switch is turned off, the heater By configuring the container to cut off electricity to the storage container, it is possible to save energy by eliminating wasted power consumption, and the ice in the water storage container is heated by the cutting heater when it is full. It is an object of the present invention to provide an ice making device that can prevent ice cubes from melting and from producing waste rice.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

Figure 1 is a cross-sectional view of the ice making device according to the present invention, in which 1
1 is a main body casing, and an ice pan 2 is attached to the lower part of the casing 1 to form an ice storage 3 inside the casing 1.

Further, a door 4 is attached to the front side of the main body casing 1 so as to be openable and closable, so that ice cubes accumulated in the water storage 3 can be taken out at any time.

Furthermore, a water supply pipe 5. A water pan 6 is arranged horizontally to store water supplied from the tank.

Reference numeral 7 denotes a plate-shaped ice-making plate, and this ice-making plate 7 is inclined at a predetermined angle and has an oblique downward flow type, and an ice-making plate rear plate 8 is attached to the inclined lower end 7a of the ice-making plate 7.

Further, a water sprinkler pipe 9 is attached to the sloped upper end 7b of the ice-making plate 7, and water pumped from the water pan 6 by a water pump 10 for water circulation is sprayed onto the lower surface of the ice-making plate 7 via the water sprinkler pipe 9. It is configured to do so.

That is, the water pump 10 is arranged on the water pan 6, and the water suction pipe 1 of the water pump 10 is
1 is vertically installed in the water pan 6, and an abbreviated water pipe 1 is installed in the delivery pipe 12 of the water pump 10.
3, a branch pipe 15 is connected to the upper end of this water pipe 13 via a pipe joint 14, and the branch pipe 15 is connected to the water sprinkler pipe 9, so that the water sucked up by the water pump 10 is transferred to each of the water pipes. The structure is such that water is supplied to the water sprinkling pipe 9 via the pipes 12, 13, and 15 mechanically, and then water is sprinkled on the lower surface of the ice-making plate 7.

Evaporator coils 16 are disposed in a meandering manner on the upper surface of the ice-making plate 7 to solidify water sprinkled on the lower surface of the ice-making plate 7 to make ice.

Next, the configuration of the refrigerant circuit including the evaporator coil 16 will be described with reference to FIG.

In the figure, 17 is a compressor, 18 is a condenser, 19 is an expansion mechanism such as a capillary tube, 16 is the evaporator coil, and 2
0 is an accumulator, which is connected in a closed loop through refrigerant piping to form a circulating refrigeration cycle.

Further, a discharge pipe 21 of the compressor 17 in the refrigerant pipe
A hot gas refrigerant pipe 24 with a hot gas electromagnetic valve 23 interposed therebetween is provided between the expansion mechanism 19 and the gas refrigerant pipe 22 between the evaporator coil 16.

The ice-making plate 7 of the diagonal flow type described above is disposed on the lower surface of the evaporator coil 16, and when the hot gas solenoid valve 23 is opened, that is, when ice is removed, Hot gas is sent from the compressor discharge pipe 21.

Below the ice-making plate 7 is a planar grid cutting heater 2 supported by a heater support plate 25 as shown in FIG.
6 are arranged parallel to the ice making plate 7.

Incidentally, in the water pan 6, a float switch 30 consisting of a high water level switch 27 for detecting full water, a low water level switch 28 for detecting completion of ice making, and a float 29 is provided, and an overflow pipe 31 is also provided.

Here, the high water level switch 27 is turned on when the water level in the water pan 6 reaches the full level, closes the water supply valve 32 via the water supply pipe 5, and closes the water supply valve 32 in the water pan 6.
This is to prevent water from overflowing.

Further, this high water level switch 27 is used to set the ice making start water level.

Further, the low water level switch 28 is a switch that is turned on at the start of the ice removal cycle after ice making is completed, and issues a command to open the water supply valve 32 and supply water into the water pan 6.

A detection lever 33 for mechanically detecting ice removal is provided at the lower end of the slant of the cutting heater 26.

This detection lever 33 is adapted to receive the sloped lower end of the ice that has taken off and fallen onto the cutting heater 26, and its specific structure will be described with reference to FIGS. 3 and 4.

The detection lever 33 has a special shape in which a comb-shaped upper tongue piece 33b is integrally formed on a lower flat plate part 33a. The upper tongue pieces 33b... are positioned between the lattice-shaped cutting heaters 26 as shown in FIG.

A force X shown in FIG. 3 acts on the detection lever 33 configured in this way.

In other words, if the gravity of the ice i that has taken off and fallen onto the cutting heater 26 is W, then the detection lever 33 has a component force of the gravity W parallel to the surface of the cutting heater 26, X = Wsin.
θ acts, and the lever 33 is detected and activated by the cutting force X.

Further, a switching lever 36 is connected to the detection lever 33 using screws 35.35, and the detection lever 33
The switching lever 36 is configured to turn on the microswitch 37 when the microswitch 37 is displaced from the solid line position in FIG. 3 to the imaginary line position in the same figure.

That is, the bent piece 36a of the switching lever 36
The actuator 38 of the microswitch 37 is brought into contact with the actuator 38 of the switching lever 36, and from the time when the ice i falls onto the cutting heater 26 until the ice i melts and is cut and dropped, the bending piece 36a of the switching lever 36 moves the microswitch 37.
The actuator 38 of the microswitch 37 is pressed to retract the pushbutton 39 to keep the microswitch 37 turned on.

The microswitch 37 is screwed to the lower surface of the heater support plate 25.

Next, the configuration of the electric circuit, which is the core of the present invention, will be explained in detail based on FIG.

In the same figure, 40, 41, 42 are input terminals of a three-phase AC power supply, and a compressor drive motor 17M is connected to these input terminals 40, 41, 42 via a dual type power switch 43 and an overcurrent relay 44. and the input terminal 4
The secondary side line 45.46 of the power switch 43 connected to the input terminal 40.42 for three phases among 0 to 42 is connected to the primary winding of the transformer 47, and the voltage is applied to the primary side of the transformer 47. The voltage (for example, 200V) is stepped down and taken out to the secondary side.

Note that, for example, 100 mm is applied to both ends of the secondary winding of the transformer 47.
The voltage of V is taken out.

A power line 50 is connected to one of the secondary windings of the transformer 47 via a fuse 48 and an operation switch 49, and a power line 52 is connected to the other secondary winding via a fuse 51. There is.

53 is a water supply command relay, and this relay 53 has a normally closed relay contact 54 and a switching relay contact 55.

56 is a valve closing command relay, and this relay 56 has a normally open relay contact 57 and a switching relay contact 58.

Reference numeral 59 denotes a relay for switching between ice making and ice removal cycles, and this relay 59 has two switching relay contacts 60 and 61.

62 is an ice making relay, and this relay 62 has two normally open relay contacts 63, 64, each of which has two normally open relay contacts 63, 64.
One of the relay contacts 64 is a self-holding contact of the ice making relay.

Reference numeral 65 denotes a compressor relay, and this relay 65 has three normally open relay contacts 66, 67, and 68, and one relay contact 68 among these three relay contacts 66 to 68 is used to drive the compressor. It is interposed in the front stage of the motor 17M.

Reference numeral 69 denotes a break-off detection relay, and this relay 69 has a normally open relay contact 70 that is a normally open switch element and a normally closed relay contact 71 that is a normally closed switch element.
0 is turned on only when ice is placed on the cutting heater 26 in conjunction with the detection lever 33 mentioned above, and the relay contact 71 is turned on only when ice is placed on the cutting heater 26 in conjunction with the detection lever 33. It is turned off only occasionally.

Reference numeral 72 denotes a bin switch, and this switch 72 is turned on when it detects that the water storage 3 is full of ice cubes, and the bin switch 72 mechanically detects that the cube ice cubes are full. It goes without saying that a switch that detects whether the ice cubes are full or a switch that detects whether the ice cubes are full based on the temperature difference caused by touching the ice may be used.

73 is a heater; 74 is a switch that is turned on and off by the heat from the heater 73; when the bottle switch 72 is turned on, the switch 74 turns off the water to the heater 73; when the bottle switch 72 is turned off, the water is turned off to the heater 73; After several tens of seconds passed after the power was cut off, it turned on and compressor 1
7, the restart time is adjusted to balance the high and low pressures of the refrigerant circuit, and to prevent the starting current from becoming excessive.

75 is a condenser fan, and 76 is a transformer.

Further, the hot gas solenoid valve 23 and the water supply valve 32 open when energized.

A series circuit of the low ice level switch 28 and the water supply command relay 53 and a series circuit of the high water level switch 27 and the valve close command relay 56 are connected in parallel between the power supply lines 50 and 52.

The high water level switch 27 also has the respective relay contacts 54.
．． 57 series circuits are connected in parallel.

Furthermore, a switching relay contact 60 is connected to the power supply line 50 via a relay contact 63, and a condenser fan 75 is connected to the ice making side terminal 60S of this relay contact 60, and a cycle switching relay 59 is connected to the ice removing side terminal 60R. The water pump 10 is connected in parallel with the condenser fan 75.

Furthermore, a heater 7 is provided between the power lines 50 and 52.
3 and the bin switch 72, and
A switching relay contact 55 is connected to the power supply line 50 via a relay contact 66, and an ice making relay 62 is connected to the normally closed terminal 55b of the switching relay contact 55 via the switch 74 and the relay contact 71. Switching relay contact 5
The normally open side terminal 55a of No. 5 is connected to the ice release side terminal 60R of the relay contact 60.

The switching relay contact 61 is connected to the power supply line 50 via the self-holding contact 64 of the ice-making relay 62, and the compressor relay 65 is connected to the common terminal 61C of the switching relay contact 61, and the ice-release side terminal 61R is connected to the switching relay contact 61. The hot gas solenoid valve 23 is connected to the ice making side terminal 615, the primary side of the ice making relay 62 is connected to the ice making side terminal 615, and the common terminal 61G and the secondary side of the switch 74 are connected to each other.

Further, a switching relay contact 58 is connected to the power line 50, and the water supply valve 32 is connected to the normally closed end ('58b) of the single contact 58, and the switch 74 is connected to the normally open terminal 58a. ing.

In other words, the switch 74 is interposed between the ice making relay 62 and the compressor relay 65 in the middle of supplying power from the power line 52.

Furthermore, a relay contact 67 is provided between the power supply lines 50 and 52.
and the primary winding of a transformer 76, and a relay contact 70, which is a normally open switch element, is connected in parallel to the relay contact 67.

Further, the cutting heater 26 is connected to the secondary winding of the transformer 76, and the transformer 76 is configured to apply a heater power voltage reduced to a low voltage of, for example, 3 volts to the cutting heater 26.

Furthermore, a series circuit of a microswitch 37 and a ice-off detection relay 69 is connected between the power lines 50 and 52 to form an electric circuit.

The present invention is constructed as described above, and its operation will be explained below.

First, we will explain the normal ice making and ice removal cycle.

When the power switch 43 and operation switch 49 are turned on now, the changeover relay contact 58 and its normally closed terminal 58b
Since power is applied to the water supply valve 32 via the water supply valve 32, the water supply valve 32 opens and water is supplied from the water supply pipe 5 into the water pan 6.

When water is supplied into the water pan 6, the water level in the water pan 6 gradually rises, and when the water level reaches the position where the low water level switch 28 is installed, the low water level switch 28 is activated by the rise of the float 29. It turns on and the water supply command relay 53 is energized.

When the water level becomes higher due to water supply, the low water level switch 28 is turned off and the water supply command relay 53 is deenergized.

Since ice is continuously supplied from the water supply pipe 5, the water level in the water pan 6 becomes higher, and when the water level reaches the position where the high water level switch 27 is installed, the float 2
9, the high water level switch 27 is turned on, and the valve closing command relay 56 is energized.

When this valve close command relay 56 is energized, the switching relay contact 58 switches from the normally closed side terminal 58b to the normally open side terminal 58a, cutting off the electricity to the water supply valve 32 and closing the water supply valve 32.
is closed, thereby stopping the water supply to the water pan 6, and the relay contact 57 is turned on to form a self-holding circuit for the valve closing command relay 56.

Due to the switching operation of the switching relay contact 58, power is applied to the compressor relay 65 via each element 50, 58, 58a, and 74, so the compressor relay 65 is energized, and the relay 65 is energized. Each relay contact 66, 67, 68 turns on, and when the relay contact 67 turns on, the transformer 76
At the same time, when the relay contact 68 is turned on, the compressor drive motor 17M rotates and the compressor 17 is operated.

Also, by the switching operation of the switching relay contact 58, the ice making relay 6
Since power is also applied to the ice making relay 62, the ice making relay 62 is energized and the relay contacts 63 and 64 of the relay 62 are turned on.

By turning on the relay contact 64, a self-holding circuit of the ice making relay 62 is formed, and by turning on the relay contact 63, power is supplied to the water pump 10 and the condenser fan 75 via each element 50, 63, 60.6O3. is applied, the water in the water pan 6 is pumped up by the water pump 10.

The water pumped up by the water pump 10 is sent to the delivery pipe 12. Water pipe 13. Pipe fitting 14 and branch pipe 1
5 and is sent to the water sprinkler pipe 9 in this order.

The water sent to the water sprinkling pipe 9 is spouted from the water sprinkling port of the iron pipe 9, flows down to the lower surface of the ice-making plate 7, and is connected to the evaporator coil 1.
6 solidifies, and plate-shaped ice having a certain thickness, for example, about 20 to 25 mm, is formed on the lower surface of the ice making plate 7.

Furthermore, when the water in the water pan 6 is pumped up one after another, the water level in the water pan 6 decreases and the high ice level switch 27 is turned off, but the valve close command relay 56 is self-held by its relay contact 57. .

In this way, when the water level in the water pan 6 further decreases to the position where the low water level switch 28 is provided, the low water level switch 28 is turned on and the water supply command relay 53 is energized.

When the water supply command relay 53 is energized, its normally closed relay contact 54 is turned off to cut off the power to the valve close command relay 56, return the switching relay contact 58 to the normally closed side terminal 58b, and energize the water supply valve 32. Then, open the numeral 32 to start supplying water to the water pan 6.

Furthermore, as the water supply command relay 53 is energized, its switching relay contact 55 is switched to the normally open side terminal 55a, so power is applied to the cycle switching relay 59 via each element 50, 66, 55, 55a, and the relay When the relay 59 is excited, the two switching relay contacts 60 and 61 of the relay 59 are both switched from the ice-making side terminals 60S and 61S to the ice-removing side terminals 60R and 61R.

Therefore, the ice release side terminal 60R of one switching relay contact 60
By switching to the ice removal side terminal 61R, the water pump 10 and the condenser fan 75 are cut off, and by switching the other switching relay contact 61 to the ice release side terminal 61R, each element 50°64.61C, 61, Power is applied to the hot gas solenoid valve 23 via 61R, and this solenoid valve 23 is opened.

When the hot gas electromagnetic valve 23 opens, the hot gas from the compressor discharge pipe 21 is sent to the evaporator coil 16 via the hot gas refrigerant pipe 24, so that the plate-like shape of a constant thickness formed on the lower surface of the ice-making plate 7 The ice is released and placed on the ice making plate 7.
It falls onto the cutting heater 26 below.

When the plate-shaped ice is released and falls onto the cutting heater 26 in this way, a component force X parallel to the heater surface with respect to the gravity W of the ice i acts on the detection lever 33. Free ice is detected mechanically, and the hinge 34 is used as a fulcrum to move from the solid line position in FIG. 3 to the virtual line position in the figure, and the microswitch 37 is turned on via the switching lever 36.

When the microswitch 37 is turned on, the ice removal detection relay 69 is excited, one of the relay contacts 70 is turned on, and the other relay contact 71 is turned off.

When the relay contact 71, which is the normally closed switch element 71, is turned off, the ice-making relay 62 is deenergized and its relay contacts 63 and 64 are both turned off.

At this point, the switching relay contact 55 has returned to the normally closed terminal 55b due to the water supply into the water pan 6, so the energization to the cycle switching relay 59 is cut off by the off operation of the relay contact 63. The relay 5
The two switching relay contacts 60 and 61 of 9 are both switched from the ice removal side terminals 60R and 61R to the ice making side terminals 60S and 61S.

Furthermore, since a low voltage power source is applied to the cutting heater 26, the ice i on the heater 26 is cut, and the cut ice (cube ice) falls onto the ice pan 2 and is stored in the water storage 3. However, the heater 26
At the same time as the ice i on the top is cut and falls, the detection lever 33
returns to its original position and turns off the microswitch 37, so that the energization to the ice removal detection relay 69 is cut off, and each relay contact 70, 71 of the relay 69 returns to its original state.

That is, one relay contact 70 is turned off and the other relay contact 71 is turned on.

In this way, the ice making and ice removal operations described above are repeated until the water storage 3 is filled with ice cubes.

The above is an explanation of the normal ice making/ice removal cycle.

Next, the operation when the water storage 3 becomes full will be explained in detail.

When the water storage 3 becomes full of ice cubes, the bin switch 72 is turned on and power supply to the heater 73 is started.

Although the switch 74 is turned off several tens of seconds after the start of energization to the heater 73, the ice-making relay 62 is self-held by its self-holding contact 64 turned on, so the ice-making process continues.

As the water pump 10 pumps water during this ice-making process, the water level in the water pan 6 gradually decreases.
When the water level drops to the position where the low water level switch 28 is installed,
The low water level switch 28 is turned on, and the water supply command relay 5
3 is excited.

When the water supply command relay 53 is energized, its relay contact 54 is turned off and the switching relay contact 55 is switched to the normally open side terminal 55a, so that each element 50, 66, 55
．． Power is applied to the cycle switching relay 59 via 55a, the relay 59 is energized, and the two switching relay contacts 60 and 61 of the cycle switching relay 59 are connected from the ice-making side terminals 60S and 61S to the ice-removing side terminal 60R. , 61R.

As a result, the hot gas solenoid valve 23 opens and the hot gas from the compressor discharge pipe 21 is sent into the evaporator coil 16, so that the plate-shaped ice formed on the lower surface of the ice making plate 7 is removed and 7 falls onto the cutting heater 26 below.

When the plate-shaped ice i is placed on the cutting heater 26, the detection lever 33 swings clockwise in FIG. 3 in the same manner as described above, and the microswitch 37 is turned on via the switching lever 36.

When the microswitch 37 is turned on, the ice removal detection relay 69 is energized, one of the relay contacts 70 is turned on, and the other relay contact 71 is turned off.

When the relay contact 71 is turned off, the excitation of the ice-making relay 62 is released, and the two relay contacts 63 and 64 of the ice-making relay 62 are both turned off, cutting off the power to the compressor relay 65. 65 relay contacts 66
．． 67 and 68 are also turned off, and the compressor drive motor 17
The operation of M and the compressor 17 is stopped.

Further, even after the relay contact 67 is turned off after the water storage 3 is full, ice is placed on the cutting heater 26 and the switch 37 is turned on, and when the relay contact 70 is turned on, the cutting heater 26 is not energized. When the ice on the heater 26 is cut and falls and the switch 37 is turned off, the relay contact 70 is turned off, and its current supply is cut off.

Then, while the relay contact 70 is in the OFF operation to interrupt subsequent ice making, the interruption continues.

When the ice i on the cutting heater 26 is cut and falls, the detection lever 33 returns to its original position, the microswitch 37 is turned off, and the ice removal detection relay 69 is turned off.
The excitation of the cutting heater 26 is canceled and the relay contact 70 is turned off, thereby cutting off the current supply to the cutting heater 26.
It is possible to prevent the ice in the water storage 3 from being heated by the cutting heater 26 when it is full, and therefore it is possible to prevent the ice cubes from melting and from producing waste rice.

Next, when the cube ice cubes in the full water storage 3 are taken out by opening the door 4, the bin switch 72 is turned off. Since the switch 74 is turned on, the high and low pressures in the refrigerant circuit are balanced, the compressor 17 is smoothly restarted, and the ice-making process is restarted.

In other words, the compressor 17 is stopped after the bin switch 72 detects that the water storage 3 is full and one cycle of ice making and ice removal has elapsed. This makes it possible to cut off the power supply to the cutting heater 26.

As a result, as mentioned above, the ice cubes melt,
It is possible to prevent waste rice from being generated, and furthermore, it is possible to eliminate wasteful power consumption.

FIG. 7 is an electric circuit diagram showing a modified structure of the above embodiment. In this embodiment, the series circuit between the micro switch 37 and the ice break detection relay 69 in FIG. The normally open contact 37a of the switch 37 is used in place of the relay contact 71, and the normally closed contact 37b of the microswitch 37 is used in place of the relay contact 71. In this embodiment, the normally open contact 37a becomes the normally open switch element, and the The normally closed contact 37b becomes a normally closed switch element.

Even with this configuration, the same operation and effect as in the previous embodiment is achieved, and in FIG. 7, the same parts as in FIG. 6 are given the same numbers, and detailed explanation thereof will be omitted.

As described in detail above, the present invention is an ice-making device in which a cutting heater 26 is installed below an ice-making plate 7 in an obliquely downstream type in parallel with the ice-making plate 7. A detection lever 33 is provided on the cutting heater 26 to mechanically detect ice removal by receiving the lower end of the slope of the ice that has taken off and fallen, and is operated in conjunction with the detection lever 33 only when ice is placed on top of the cutting heater 26. A detection element 37 such as a micro switch that detects ice, a normally open switch element 70 that is turned on only at that time, and a normally open switch element 70 that is turned on only at that time,
Normally closed switch element 7 that turns off only when the
1, a compressor relay 65, and a normally open relay contact 68 of the relay 65, and the relay contact 68 is interposed in the front stage of the compressor drive motor 17M, while the power supply line 50,
52, an ice-making/ice-removal cycle switching relay 59 having a switching relay contact 61 and an ice-making relay 62 are connected in parallel, and the self-holding contact 64 of the ice-making relay 62 and the switching relay contact are connected to the power line 50. 61, the compressor relay 65 is connected to the common terminal 61C of the switching relay contact 61, the hot gas solenoid valve 23 is connected to the ice-release side terminal 61R, and the ice-making relay 62 is connected to the ice-release side terminal 61S. Note: The normally closed switch element 71 is interposed on the primary side of the ice making relay 62, and the water storage 3 is connected to the primary side.
Bin switch 7 that detects when the ice cubes are full
2, and a switch 74 that is turned off when the bottle is full by the bin switch 72 is interposed in the middle of supplying power from the power line 52 to the ice making relay 62 and the compressor relay 65, A parallel circuit of the normally open relay contact 67 of the compressor relay 65 and the normally open switch element 70 is provided on the side, and when the bin switch 72 detects that the water storage 3 is full, the cutting Since the cutting heater 26 is configured to be energized only when ice is on top of the heater 26, the detection lever 33 can mechanically detect ice removal. As a result, stable de-icing detection can be performed that is not affected by outside temperature.

Furthermore, after the bin switch 72 detects that the water storage 3 is full of ice cubes and one cycle of ice making and ice removal has elapsed, when the ice i on the cutting heater 26 is cut and falls, the cutting heater 26 Since the structure is configured to cut off the electricity to the cutting heater 26, it is possible to save energy by eliminating wasteful power consumption. This has the effect of eliminating the inconvenience of heating, thereby preventing cube ice cubes from melting and waste rice from forming.

[Brief Description of the Drawings] Fig. 1 is a sectional view of the ice making device according to the present invention, Fig. 2 is a refrigerant circuit diagram including the evaporator coil 16, Fig. 3 is an enlarged view of the main parts of Fig. 1, and Fig. 4 are cutting heater 26 and detection lever 3
3, FIG. 5 is a perspective view showing the structure related to the detection lever 33 and the micro-sinch 37, FIG. 6 is an electric circuit diagram, and FIG. 7 is another embodiment of the present invention. FIG. 3 is an electrical circuit diagram illustrating an example. 3...Ice storage, 7...Ice making plate, 17.
...Compressor, 17M...Compressor drive motor, 23...Hot gas solenoid valve, 26...
... Cutting heater, 33 ... Detection lever 37 ... Micro switch, 37a, 70
...... Normally open switch element, 37b, 71...
... Normally closed switch element, 50, 52 ... Power line, 59 ... Cycle switching relay, 61 ...
...Switching relay contact of cycle switching relay, 61C
・・・・・・Common terminal of switching relay contact, 61R...
...Ice release side terminal of switching relay contact, 61S-□・Ice release side terminal of song switching relay contact, 62...Ice making relay, 64...Self-holding contact, 64.・・・・・・
・Compressor relay, 67.68... Normally open relay contact of compressor relay, 72... Bin switch, 74... Song switch.

Claims (1)

[Scope of utility model registration request] In an ice-making device in which a cutting heater 26 is installed below an ice-making plate 7 of an oblique-flow type in parallel with the ice-making plate 7,
A detection lever 33 is provided at the lower end of the cutting heater 26 to mechanically detect the ice falling off the cutting heater 26 by receiving the lower end of the slope, and in conjunction with the detection lever 33, the ice is removed. A detection element 37 such as a microswitch that detects only when ice is placed on the cutting heater 26, a normally open switch element 70 that is turned on only at that time, and a detection lever 33 that works in conjunction with the detection lever 33 to detect when ice is placed on the cutting heater 26. a normally closed switch element 71 that is turned off only when
A normally open relay contact 68 of the relay 65 is provided, and the relay contact 68 is provided at the front stage of the compressor drive motor 17M, while a switching relay contact 61 is provided between the power supply lines 50 and 52.
An ice making/ice making cycle switching relay 59 and an ice making relay 62 are connected in parallel, and the self-holding contact 64 of the ice making relay 62 and the switching relay contact 61 are connected to the power line 50, and the switching The compressor relay 65 is connected to the common terminal 61c of the relay contact 61, and the ice release side terminal 6
The hot gas solenoid valve 23 is connected to 1R, the primary side of the ice making relay 62 is connected to the ice making side terminal 61S, and the normally closed switch element 71 is interposed on the primary side of the ice making relay 62. 3 is provided with a bin switch 72 that detects when the ice cubes are full, and the bin switch 72
A switch 74 that is turned off when full is provided between the ice making relay 62 and the compressor relay 65 to supply power from the power line 52, and a compressor relay on the primary side of the cutting heater 26. A parallel circuit is provided between the normally open relay contact 67 of 65 and the normally open switch element 70, and when the bin switch 72 detects that the water storage 3 is full, ice is placed on the cutting heater 26. An ice making device characterized in that the cutting heater 26 is energized only when the cutting heater 26 is in use.