JP2000171132A - Setting system for ice making apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make ice blocks with an even size by means of an ice making apparatus, by correcting variation of the characteristics of a temperature sensor. SOLUTION: The setting system is applicable to an ice making apparatus I which circulates water for ice making to a cooler 1 included in a cooling apparatus and carries out ice-making operation over a predetermined lapse of time for ice making from a time point when the temperature of water for ice making reaches an ice point, based on an output from a WT sensor 51 for detecting the temperature of the water for ice making. Temperature drop of the water for ice making is monitored based on the output from the WT sensor 51, and an output value of the WT sensor 51 at which the temperature of the water for ice making remains unchanged is set as the ice point.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a setting system for an automatic ice maker that circulates ice making water through a cooler such as a so-called inverted cell ice maker to make ice.

[0002]

2. Description of the Related Art An ice maker of this type, particularly an inverted cell type ice maker, is disclosed in, for example, Japanese Patent Application Laid-Open No. 7-234049 (F25C1 / 04). A water tray that can be tilted and retracted is provided below the cooler that defines the chamber, and the high-temperature and high-pressure refrigerant discharged from the compressor is condensed by the condenser while the water tray is closing the ice making chamber. After the pressure is reduced by the decompression device, the ice is made to flow into an evaporating pipe provided on the outer upper surface of the cooler and evaporated to cool the ice making chamber, and the ice making water stored in the water tank is discharged from the surface of the water tray to each ice making chamber. In the state where the ice making process is performed by fountain water, the high temperature and high pressure refrigerant (hot gas) from the compressor is directly flown into the evaporating pipe in a state where the water tray opens the ice making room, and the ice making process is performed by heating. ing.

In this case, the ice making time in the ice making process is as follows:
It is controlled by an ice making timer which is started to accumulate when the temperature of the circulating ice-making water drops near the freezing point, and shifts to a deicing process after the end of the accumulation of the ice making timer.

[0004]

The temperature of such ice making water is detected by a temperature sensor provided in a water tank in which the ice making water is stored, but the characteristics of the temperature sensor vary among individuals. Therefore, there is a risk that the temperature obtained based on the output of the temperature sensor does not reach the freezing point even though the ice making water is actually at the freezing point.

Therefore, conventionally, when the temperature of the ice making water based on the output of the temperature sensor reaches, for example, + 3 ° C., it is determined that the preparation of the ice making is substantially completed, and the accumulation of the ice making timer is started from that point. As a result, there is a problem that the size of the resulting ice varies depending on the actual temperature of the ice making water at the time when the accumulation of the ice making timer is started.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the related art, and can correct the variation in the characteristics of the temperature sensor and generate ice of a uniform size by an ice maker. It provides a setting system.

[0007]

That is, the setting system of the present invention circulates ice-making water to a cooler included in a cooling device and, based on the output of a temperature sensor for detecting the temperature of the ice-making water, uses the same. Is applied to an ice making machine that performs an ice making operation until a predetermined ice making time elapses from the stage when the temperature of the ice making water reaches the freezing point, and monitors the temperature drop of the ice making water based on the output of the temperature sensor, and It is characterized in that the output value of the temperature sensor at which point disappears is set as a freezing point.

According to a second aspect of the present invention, there is provided an ice making machine setting system, wherein the temperature sensor includes a temperature detecting element, a storage means having its own ID code, and a transmitting / receiving means for exchanging data with the outside. A sensor-side control means for taking in temperature data based on the detection operation of the temperature detection element, writing the data in the storage means, and outputting the temperature data in the storage means to the outside by the transmission / reception means, and setting means. Monitors the temperature data output from the temperature sensor, and when there is no change in the temperature data, instructs the temperature sensor to correct the output at that time to the temperature data of the freezing point. , The output at that time is corrected to the freezing point temperature data and stored.

The temperature of the ice making water circulated through the cooler gradually decreases due to the cooling action from the cooler, and when the temperature reaches the freezing point, latent heat is taken away. The change disappears.

According to the present invention, the temperature drop of the ice making water is monitored based on the output from the temperature sensor, and the output value of the temperature sensor at which the temperature change of the ice making water has stopped is set as the freezing point. Therefore, the ice making operation of the ice making machine can be started when the temperature of the ice making water actually reaches the freezing point. This makes it possible to equalize the size of the generated ice even when there are individual differences in the characteristics of the temperature sensor.

In particular, according to the second aspect of the present invention, since the temperature data is corrected on the temperature sensor side, there is no need to convert the data on the temperature data receiving side, and the control operation is simplified. It will be possible to realize the conversion.

[0012]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. 1 is an electric circuit diagram of an ice maker I to which the present invention is applied, FIG. 2 is a side view of an ice making part of the ice maker I in a state where the water tray 5 is in a horizontal closed position, and FIG. FIG. 4 is a side view of the ice making section of the ice making machine I in the position shown in FIG.
FIG. 3 is a refrigerant circuit diagram of a cooling device R of the ice making machine I.

Referring to FIGS. 2 and 3, the ice making machine I of the embodiment is shown.
Is a so-called inverted cell type ice maker, which has a plurality of ice making chambers 1A which open downward and has a cooling device 1 provided with an evaporating pipe 2 of a cooling device R on an outer surface of an upper wall thereof; FIG.
At each predetermined horizontal closing position, each ice making chamber 1A is closed from below with sufficient margin, and a water tray 5 having a fountain hole and a return hole (not shown) corresponding to each ice making chamber 1A formed on the surface thereof.
And a water tank 6 fixed to the water tray 5 and communicating with the return hole, and water in the water tank 6 is spouted from the fountain hole through a water supply pipe 7 and a distribution pipe (not shown), and each ice making chamber 1A A drive unit 11 including a circulation pump 9 for circulating water, a reduction gear motor 10 capable of forward and reverse rotation for tilting and returning the water tray 5 and a water supply solenoid valve 12 shown in FIG. And a water level switch WLSW that operates by a float provided in the water tank 6 and detects a predetermined full level of the water tank 6.

The mounting plate 1 fixed to the support beam 15
The first and second arms 17A and 17A extending in opposite directions are attached to the output shaft of the deceleration motor 10 supported by
7B, and a coil spring 18 attached to the end of the first arm 17A of the driving cam 17
Is connected to the side of the water tray 5, and the rear part of the water tray 5 is supported by a rotating shaft 19.

ASW is a contact-type water tray position detection switch for detecting the horizontal closed position and the inclined open position of the water tray 5 by opening and closing its contacts. The water dish position detection switch ASW is in a positional relationship in which the first and second arms 17A and 17B of the drive cam 17 are in contact with each other, and when the drive cam 17 rotates counterclockwise in the drawing due to forward rotation of the deceleration motor 10. When the water tray 5 is in the inclined open position, the second arm 17B abuts on the water tray position detection switch ASW as shown in FIG. 3, whereby the contact of the water tray position detection switch ASW closes and moves backward. Is reversed.

When the drive cam 17 rotates clockwise in the drawing due to the reverse rotation of the deceleration motor 10, the first arm 17A detects the water tray position as shown in FIG. The switch ASW contacts the switch ASW, whereby the contact of the water dish position detection switch ASW is opened and switched to the tilting side.

The components described above are provided on the ice making section side of the ice making machine I. On the machine room side of the ice making machine I, the compressor 21, the auxiliary condenser 41 and the condenser 21 of the cooling device R as shown in FIG. A device 42 and the like are provided. Next, the circulation of the refrigerant in the cooling device R will be described with reference to the refrigerant circuit diagram of FIG.
The high-temperature and high-pressure gas refrigerant discharged from 1 is supplied to the auxiliary condenser 4
After returning to the compressor 1 and radiating heat, it once returns to the compressor 21 and is discharged again to reach the three-way pipe 43. The refrigerant flowing out of one outlet of the three-way pipe 43 is air-cooled and condensed in the condenser 42, passes through the liquid receiver 44 and the dryer 45, and expands as an expansion valve 4 as a pressure reducing device.
To 6.

The refrigerant throttled by the expansion valve 46 flows into the evaporating pipe 2 and evaporates, and absorbs heat from the cooler 1 to cool it. And this evaporation pipe 2
Is returned to the compressor 21 via the accumulator 47. Further, the expansion valve 46 is supplied from the other outlet of the three-way valve 43.
A hot gas pipe 48 having a hot gas solenoid valve 23 interposed is connected to the outlet side of the hot gas solenoid valve 23, and a high-temperature and high-pressure gas refrigerant (hot gas) discharged from the compressor 21 with the hot gas solenoid valve 23 opened. ) Is supplied directly to the evaporation pipe 2.

Next, in FIG. 1, reference numeral 121 denotes an AC power supply line wired in the main body 5 of the ice making machine I, and reference numeral 122 denotes a signal line for transmitting and receiving data. The control box 20 of the ice maker I is connected to the AC power supply line 121 and the signal line 122, and the drive board 123 of the compressor 21, the power supply board 124 of the circulation pump 9 and the reduction motor 10, the hot gas solenoid valve 23, and the water supply The power supply board 126 of the solenoid valve 12 is AC
Connected to power supply line 121.

The signal line 122 has a chip-shaped ET sensor 26 for detecting the temperature of the cooler 1 and the condenser 4
2, a chip-shaped CT sensor 31 for detecting the outlet temperature (temperature of the condenser 42), a chip-shaped WT sensor (temperature sensor) 51 for detecting the water temperature in the water tank 6, and a chip-shaped for detecting the outside air temperature. The AT sensor 52 and the chip-like switching elements 128 attached to the drive board 123 and the power supply boards 124 and 126, respectively, are connected via connectors. The power supply boards 124, 1
26 shows one switching element 128,
Actually, they are provided for the circulation pump 9, the deceleration motor 10, the hot gas solenoid valve 23, and the water supply solenoid valve 12, respectively.

In particular, the deceleration motor 10 is also provided with a switching element 128 for switching between forward rotation and reverse rotation. Although not shown, the condenser cooling fan 22 also has an AC
The power supply line 121 and the signal line 122 are connected.

FIG. 5 shows the structure of the control box 20. The control box 20 is provided with a controller (substrate) 136. This controller 1
36 is a CPU (microcomputer) 131, a memory 132 as storage means, an I / O interface 1
33 and a bus I / O interface 134 as transmission / reception means. The control box 20 is provided with a display 137 constituted by a liquid crystal display panel, a switch 138 as input means (keyboard, mouse, etc.), a switch 139 as switching means, and the like. 137 and switch 13
Reference numeral 8 is connected to the I / O interface 133 and provided on an operation panel (not shown).

The I / O interface 133 is connected to the water level switch WLSW and the water tray position detection switch ASW, and closes a contact when a predetermined amount of ice in an ice storage (not shown) is detected. Switch B
SW is connected (FIG. 1).

The bus I / O interface 1
34 is connected to the signal line 122 via the switch 139, and the sensors 26, 31, 5 and 5 are connected via the signal line 122.
1, 52 and the switching elements 128... An external laptop personal computer P (setting means) or the like can be connected to the switch 139 via a communication line 142. The switch 139 always connects the bus I / O interface 134 to the signal line 122. However, when the personal computer P is connected, the bus I / O interface 134 (that is, the control box 20) is connected to the signal line 122. Then, the personal computer P is connected to the signal line 122.

The controller 136 includes the temperature sensors 26, 31, 51, 52 and the switching element 128,
A predetermined communication protocol for performing data communication with the personal computer P, software for searching for and identifying each of the sensors 26, 31, 51, 52, and the switching element 128 described later are set. The above-mentioned sensors 26, 31, 51, 52 and switching element 128 are also provided in the personal computer P.
And a predetermined communication protocol for performing data communication with the controller 136 and the sensors 26, 31, 51,
It is assumed that software for searching for and identifying the switching element 52 and the switching element 128 is set.

Next, the configuration of the ET sensor 26, CT sensor 31, WT sensor 51, and AT sensor 52 are shown in FIG. Since the sensors 26, 31, 51, and 52 have the same configuration, the WT sensor 51 will be described below. W
The T sensor 51 includes a CPU 14 as a sensor-side control unit.
3, a memory 144 as a storage unit, an I / O interface 146 as a transmission / reception unit, an A / D converter 147, and a sensor unit 148 as a temperature detecting element connected to the A / D converter 147. , A capacitor 149 as a storage element and a diode 151 as a rectifier
It is composed of

In this case, the capacitor 149 is connected to the output side of the diode 151, and each element is connected to a connection point between the diode 151 and the capacitor 149.
A potential (high potential) of, for example, +5 V is applied to the signal line 122, and data is composed of pulses that fall from this high potential to a low potential of 0 V, for example.

When the WT sensor 51 is connected to the signal line 122, power is supplied to each element as long as the high-potential and low-potential pulse signals constituting data are at the high potential, and the capacitor 149 is turned on. Is also charged. And
While the potential is low, the capacitor 149 discharges power to supply power to each element.

The WT sensor 51 has Vcc (DC + 5
V) A power supply terminal 145 is also provided, and is connected to a connection point between the diode 151 and the capacitor 149. When the Vcc power supply terminal 145 is connected to a power supply line, each element is supplied with power from the power supply line. It is configured so that it can also operate. That is, in this case, each element operates without charging the capacitor 149, so that the convenience is improved when the WT sensor 51 is required to be operated promptly at the time of inspection or the like.

Further, the CPU 143 takes in the temperature data detected by the sensor section 148 via the A / D converter 147 and temporarily writes it into the memory 144. Then, when polling from the controller 136 via the signal line 122 by the I / O interface 146, the memory 144
Temperature data written to the I / O interface 1
46 to the controller 136 via the signal line 122.

Here, the WT sensor 51 is stored in the memory 144.
It stores its own ID code, identification data indicating that it is a sensor, each set value data, a protocol for performing data communication with the controller 136, and the like. Also,
If a failure has occurred in the WT sensor 51, the failure data is also written to the memory 144 and transmitted to the controller 136.

FIG. 7 shows the structure of the switching element 128. The switching element 128 includes a CPU 158 as a switching element side control unit, a memory 159 as a storage unit, an I / O interface 161 as a transmission / reception unit, an I / O interface 162 as a driver, and an I / O interface 16 as a driver.
2, a transistor 163 as switching means, a capacitor 164 as an electric storage element, a diode 166 as a rectifying element, and the like.

In this case, the capacitor 164 is connected to the output side of the diode 166, and each element is connected to a connection point between the diode 166 and the capacitor 164.
When the switching element 128 is connected to the signal line 122, power is supplied to each element as long as the high-potential and low-potential pulse signals constituting data are at high potential as described above, and the capacitor 164 is also supplied. Charged. And
While the potential is low, the capacitor 164 is discharged to supply power to each element.

The switching element 128 also has a Vcc (DC + 5V) power supply terminal 1 connected to a connection point between the diode 166 and the capacitor 164, as shown by a broken line in FIG.
If the Vcc power supply terminal 55 is provided and this Vcc power supply terminal 155 is connected to a power supply line, each element of the switching element 128 can operate even when power is supplied from the power supply line. That is, in this case, each element operates without charging the capacitor 164, so that the convenience is improved when the switching element 128 is to be operated quickly at the time of inspection or the like.

When ON / OFF data is transmitted from the controller 136 via the signal line 122 by the I / O interface 161, the CPU 158
I / O interface 1 based on N / OFF data
62 turns on / off the transistor 163.

Here, the memory 159 stores an ID code of the switching element 128 itself, identification data indicating that the element is a switching element, a protocol for performing data communication with the controller 136, and the like. If a failure has occurred in the switching element 128, the data is also written to the memory 159 and transmitted to the controller 136.

The switching elements 128 are wired as shown in FIG. 8 on each of the drive boards 123 and the power supply boards 124 and 26 to form a switching unit 168. That is, 169 is a photocoupler composed of a photodiode 169A and a phototriac 169B, 171 is a resistor, 172 is a diode as a rectifying element, and 174 is a capacitor as a power storage element.

In this case, the capacitor 174 is connected to the output side of the diode 172, and the resistor 171 is connected between the connection point between the diode 172 and the capacitor 174 and the collector terminal (indicated by S2 in FIG. 7) of the transistor 163 of the switching element 128. And the photodiode 169A are connected in series. Also, the terminal S of the switching element 128
1 (FIG. 7) is connected before the diode 172. The phototriac 169B is interposed between the AC power line 121 and the compressor 21, the circulation pump 9, the reduction motor 10, the hot gas solenoid valve 23, and the water supply solenoid valve 12, respectively.

When the diode 172 is connected to the signal line 122, power is supplied to the photodiode 169A via the resistor 171 while the high-potential and low-potential pulse signals constituting data are at the high potential. , The capacitor 174 is also charged. While the potential is low, it is discharged from the capacitor 174 to supply power to the photodiode 169A.

Similarly, if the Vcc power supply terminal 160 is connected to the connection point between the diode 172 and the capacitor 174, and this Vcc power supply terminal 160 is connected to the power supply line, the photodiode 169A operates even when power is supplied from the power supply line. Will be able to do it. That is, in this case, each element operates without charging the capacitor 174, so that convenience can be improved when it is desired to operate quickly at the time of inspection or the like.

The operation of the above configuration will be described. First, it is assumed that the personal computer P is not connected to the switch 139, and the operation at the time of production of the ice maker I will be described. Each sensor 2
Assuming that 6, 31, 51, 52 and the switching elements 128 are connected to the signal line 122, the controller 136 (the CPU 131) first transmits each element (the sensors 26, 31, 51, 52, The connection status of the switching element 128 is searched.

In this case, the controller 136 includes all the sensors 26, 31, 51, 52, and the switching element 128.
··· Make an ID request to all sensors 2 in response to this
6, 31, 51, 52, the switching elements 128,... Return their own ID codes and the like to the controller 136. The controller 136 sends the ET sensor 26 and the CT sensor 3 to the signal line 122 based on the returned ID code and the like.
1, a WT sensor 51 and an AT sensor 52 are connected, and a switching element 128 for the compressor 21, a switching element 128 for the circulation pump 9, and a deceleration motor 10
The switching element 128 for the hot gas solenoid valve 23 and the switching element 128 for the water supply solenoid valve 12 are connected.

The controller 136 detects the detected sensor 2
The connection status between the switching elements 6, 31, 51, 52 and the switching elements 128,... Is held in the memory 132, and thereafter, data is transmitted to each element using this ID code.

Then, based on the recognition result, the controller 136 displays the connection status of each sensor and the switching element on the display 137. When any one of the sensors or the switching elements is removed from the signal line 122, the controller 136 deletes the corresponding display. Conversely, when a sensor or a switching element is added, the controller 136 adds a corresponding display.

In other words, according to this configuration, the sensors and switching elements operate only by connecting the signals and the switching elements to the signal line 122, and the controller 136 recognizes them. The properties are significantly improved.

Next, the operation at the time of inspection of the ice making machine I will be described. That is, the personal computer P is connected to the switch 139 in the inspection. At this time, the controller 136 is connected to the signal line 1 as described above.
22. In this state, the personal computer P starts the ice making process of the ice making machine I.

In this ice making process, the compressor 2
The ON data is transmitted to the switching element 128 corresponding to 1 and the compressor 21 is started. The refrigerant discharged from the compressor 21 is supplied to the auxiliary condenser 41 and the condenser 42 as described above.
After being condensed and liquefied by the expansion valve 46, it is supplied to the evaporation pipe 2, where it is evaporated to cool the cooler 1. The switching element 1 corresponding to the circulation pump 9
The ON data is also transmitted to 28, and the circulation pump 9 is operated to circulate the ice making water in the water tank 6 from the fountain hole to each ice making chamber 1A.

The personal computer P receives the temperature data output by the WT sensor 51 in the operation described later and
Monitor the temperature of the ice making water inside. Since the cooler 1 has a low temperature due to the cooling action from the evaporating pipe 2, each ice making chamber 1
The temperature of the ice making water circulated to A also gradually decreases.
Then, when the temperature of the ice making water reaches 0 ° C. (freezing point), latent heat is removed therefrom, so that the temperature of the ice making water does not change for a certain period.

Thus, there is no change in the temperature data output from the WT sensor 51 for a certain period. PC P
Means that the temperature data of the WT sensor 51 at that time is 0
If it is not the temperature data of 0 ° C. (freezing point) (temperature data meaning 0 ° C. (freezing point)), the deviation between the output value and the temperature data of 0 ° C. (freezing point) is calculated, and the offset value is output via the signal line 122. Is transmitted to the WT sensor 51 to issue a correction instruction.

When receiving the correction instruction, the CPU 143 of the WT sensor 51 corrects the output value at that time to 0 ° C. (freezing point) temperature data based on the offset value and stores it in the memory 144. Thus, the WT sensor 51 outputs the temperature data of 0 ° C. (freezing point) when the temperature of the ice making water is actually 0 ° C. (freezing point).

Next, the actual control operation after the installation of the ice making machine I will be described. At this time, the personal computer P has been removed. In each of the following steps, the controller 136 is used.
CPU 131 polls the sensors 26, 31, 51, and 52 at a predetermined cycle. This polling is performed based on the above-mentioned ID code.

CPU 1 of sensors 26, 31, 51, 52
43 transmits the temperature data to the controller 136 in response to the polling. CPU 13 of controller 136
1 temporarily writes the received temperature data in the memory 132 and transmits the ON / OFF data to the signal line 122 together with the ID code of the switching element 128 of the drive board 123.

Switching element 128 of drive substrate 123
When the CPU 158 receives ON / OFF data of its own ID code, it turns ON / OFF the transistor 163 based on the received data. This transistor 163
Is turned ON / OFF, the photodiode 169A becomes O
N (emission) / OFF (extinguish), whereby the phototriac 169B is turned ON / OFF, whereby the compressor 21 is started / stopped.

The CPU 131 of the controller 136
Indicates the ON / OFF data together with the ID code of the switching element 128 of the power supply boards 124 and 126 along with the signal line 122
To control the operations of the circulation pump 9, the deceleration motor 10, the hot gas solenoid valve 23, and the water supply solenoid valve 12.

Then, the controller 136 first executes the ice making process of the ice making machine I. In this ice making process, the compressor 21
Is condensed and liquefied in the auxiliary condenser 41 and the condenser 42 as described above, throttled by the expansion valve 46, and then supplied to the evaporating pipe 2, where it is evaporated and cooled.
To cool. Further, the controller 136 operates the circulation pump 9 to circulate the water in the water tank 6 from the fountain holes to each ice making chamber 1A while supplying water by the water supply electromagnetic valve 12.

Thereafter, the controller 136 determines whether or not the water level switch WLSW is closed. When a predetermined amount of water is supplied into the water tank 6, and the water level switch WLSW detects and closes a predetermined full water level, the water supply solenoid valve 12 is closed. Close to stop water supply.

The controller 136 is connected to the WT sensor 5
The temperature of the ice making water in the water tank 6 is taken in based on the temperature data output by 1 and the temperature of the ice making water is 0
It is determined whether the temperature has reached ℃. Then, when the temperature of the ice making water output by the WT sensor 51 reaches 0 ° C., the controller 136 starts integration of an ice making timer as a time limit means having the function, and starts an ice making operation.

The ice making time by the ice making timer is set in advance by a test to a value at which a predetermined volume (determined by the size of the hole) of ice is generated in the ice making chamber 1A.

When the accumulation of the ice making timer is completed (counting up), the controller 136 stops the fan 22 for cooling the condenser and the circulation pump 9. next,
The deceleration motor 10 is rotated forward to start the tilting of the water tray 5, and the hot gas solenoid valve 23 is opened to circulate the high-temperature and high-pressure gas refrigerant (hot gas) through the evaporating pipe 2.
Is heated to move to a de-icing process of ice frozen in the ice making chamber 1A.

When the water tray 5 is tilted to a predetermined tilt opening position (full open) as shown in FIG. 3 during the ice-removing process, the second arm 17B of the driving cam 17 is turned on by the water tray position detection switch AS.
W is reversed in contact with W,
36 stops the deceleration motor 10 to stop the tilting of the water tray 5. When the water tray 5 is at the inclined open position, the ice making water in the water tank 6 is drained to a drain (not shown) located immediately below the water tank 6. Then, the temperature data output by the ET sensor 26 is fetched, and it is determined whether or not the fetched temperature of the cooler 1 has become higher than a deicing completion temperature such as + 9 ° C. Then, the water tray 5 is moved upward.

When the water tray 5 returns to the predetermined horizontal closed position (fully closed) as shown in FIG.
7 is provided with a water tray position detection switch ASW.
, And is reversed to the tilting side.
6 closes the hot gas solenoid valve 23 and stops the deceleration motor 10 to stop the water tray 5 from returning. And
The controller 136 shifts to the ice making process again while operating the compressor 21.

The controller 136 during the ice removing process
Determines whether the ice storage switch BSW is closed. If a predetermined amount of ice is stored in an ice storage (not shown), the operation of the compressor 21 is stopped and the process proceeds to the ice storage process. Then, after that, the ice in the ice storage decreases and the ice storage switch BSW
Is maintained until is closed, and when the ice storage switch BSW is closed, the ice making process is executed.

In the above embodiment, the PC P
Although the WT sensor 51 is set to 0 ° C. by the above, the present invention is not limited to this, and the controller 136 may sequentially set 0 ° C. during the ice making process.

[0064]

As described above in detail, according to the present invention, the temperature drop of the ice making water is monitored based on the output from the temperature sensor, and the output value of the temperature sensor at the time when the temperature change of the ice making water has disappeared. Since the freezing point is set, the ice making operation of the ice making machine can be started when the temperature of the ice making water actually becomes the freezing point.
This makes it possible to equalize the size of the generated ice even when there are individual differences in the characteristics of the temperature sensor.

In particular, according to the second aspect of the present invention, since the temperature data is corrected on the temperature sensor side, there is no need to perform data conversion on the temperature data receiving side, and the control operation is simplified. It will be possible to realize the conversion.

[Brief description of the drawings]

FIG. 1 is an electric circuit diagram of an ice making machine to which the present invention is applied.

FIG. 2 is a side view of an ice making compartment of the ice making machine in a state where a water tray is in a horizontal closed position.

FIG. 3 is a side view of an ice making compartment of the ice making machine in a state where a water tray is at an inclined open position.

FIG. 4 is a refrigerant circuit diagram of the cooling device of the ice making machine of the present invention.

FIG. 5 is a block diagram of an electric circuit of the control box.

FIG. 6 is a block diagram of an electric circuit of the WT sensor.

FIG. 7 is a block diagram of an electric circuit of the switching element.

FIG. 8 is an electric circuit diagram of a switching unit using a switching element.

[Explanation of symbols]

 I Ice machine R Cooling device 1 Cooler 1A Ice making room 2 Evaporation pipe 5 Water tray 6 Water tank 10 Deceleration motor 20 Control box 21 Compressor 22 Fan 26 ET sensor 31 CT sensor 42 Condenser 46 Expansion valve 51 WT sensor 122 Signal line 128 Switching element 131, 143, 158 CPU 132, 144, 159 Memory 136 Controller 139 Switcher 142 Communication line 146, 161 I / O interface 148 Sensor section 149, 164 Capacitor 151, 166 Diode 163 Transistor 169 Photocoupler 169A Photodiode 169B Phototriac P PC

Continuation of the front page (72) Katsumi Maekawa 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Kazuya Imamura 2-5-2-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Tsutomu Ishikura 2-5-5 Keihanhondori, Moriguchi-shi, Osaka F-term in Sanyo Electric Co., Ltd. 3L110 AA01 AB00

Claims (2)

[Claims] An ice-making water is circulated to a cooler included in a cooling device, and based on an output of a temperature sensor for detecting a temperature of the ice-making water, a predetermined ice-making water is produced at a stage when the temperature of the ice-making water reaches a freezing point. In the ice making machine that executes the ice making operation until time passes, the temperature drop of the ice making water is monitored based on the output of the temperature sensor, and the output value of the temperature sensor when the temperature change of the ice making water disappears is obtained. An ice making machine setting system, wherein the setting is made as the freezing point. 2. A temperature sensor, comprising: a temperature detection element, a storage means having its own ID code, a transmission / reception means for exchanging data with the outside, and temperature data based on a detection operation of the temperature detection element. Writing in the storage means,
A sensor-side control unit for outputting the temperature data in the storage unit to the outside by the transmission / reception unit; and a setting unit provided. The setting unit monitors the temperature data output from the temperature sensor, and When there is no change in the data, the temperature sensor is instructed to correct the output at that time to the temperature data of the freezing point, and the temperature sensor corrects the output at that time to the temperature data of the freezing point based on the correction instruction. The setting system for an ice making machine according to claim 1, wherein the setting is stored.