JPH0998724A - Apparatus for manufacturing frozen dessert - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the quality deterioration of mix during cooling and heat sterilization. SOLUTION: An apparatus 1 for manufacturing frozen desserts having different temperature ranges such as shake and soft cream is composed of a hopper 2 for storing mix and keeping it cold, a cooling cylinder 8 for cooling the mix occasionally supplied from the hopper 2, a freezing apparatus for cooling the cooling cylinder 8, a sensor 31 for directly or indirectly detecting the temperature of the mix in the cooling cylinder 8 and a beater 10 for stirring the mix in the cooling cylinder 8. At the initial operation for cooling shake which is a frozen dessert having a higher temperature range, the cooling cylinder 8 is cooled and at the same time the beater 10 is actuated. When the cylinder sensor 31 finds that the temperature has come to a set temperature somewhat higher than the lowest set temperature, the cooling is stopped for a predetermined time while only the beater 10 is actuated. After the predetermined time has passed, the cooling cylinder is cooled again down to the lowest set temperature.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frozen dessert producing apparatus for producing frozen desserts having different temperature zones.

[0002]

2. Description of the Related Art Conventionally, a device of this type has been disclosed in Japanese Utility Model No. 63.
A compressor, a condenser,
It is equipped with a refrigeration system consisting of a cooler equipped with a throttle and a cylinder and a mix tank, and the refrigeration cycle of this refrigeration system is reversible by a four-way valve. On the other hand, at the time of sterilizing and cleaning the mix, the equipment, the high temperature refrigerant gas (hot gas) from the compressor is guided to the cooler to radiate heat.
There is one in which a cooler acts as a radiator to heat a cylinder and a mix tank. The law requires that the mix be heated at the specified temperature for the specified time. Specifically, it is performed at 68 ° C. or higher for 30 minutes or longer.

The frozen dessert producing apparatus as described above generally has the ability to produce both a shake (about -3 ° C) and a soft cream (about -8 ° C).

[0004]

Therefore, in pulling down (initial operation) of the shake mix, if the temperature is lowered to the shake lower limit set temperature at once, it will be completed in a short time, and stirring in the cooling cylinder will be insufficient. Therefore, the ratio of air to shake raw material (overrun)
However, there is a problem that a low quality shake is extracted.

Further, if the cooling is performed all at once, there is a problem that the overshoot of the temperature of the cooling cylinder becomes large and the shake immediately after the pull-down is too cold and becomes hard.

Further, during heat sterilization, the cooling cylinder and the hopper are simultaneously heated. However, in the capacity of the hopper and the capacity of the cooling cylinder, since the capacity of the hopper is larger than the capacity of the cooling cylinder, the cooling cylinder is the first. The sterilization temperature is reached, and then the hopper reaches the sterilization temperature. Therefore, the heat sterilization of the cooling cylinder is performed more than necessary, and there is a problem that the quality of the mix deteriorates.

The present invention has been made in view of the above problems, and an object thereof is to prevent the quality of frozen desserts from being deteriorated during cooling or heat sterilization.

[0008]

As means for achieving the above object, in the invention of claim 1, in a frozen dessert manufacturing apparatus for manufacturing frozen desserts having different temperature zones, a hopper for storing and keeping the mix cold, and A cooling cylinder that cools the mix that is appropriately supplied, a refrigeration device that cools this cooling cylinder, a sensor that indirectly or directly detects the temperature of the mix in the cooling cylinder, and agitate the mix in the cooling cylinder. And a stirring device for cooling the frozen dessert produced in a higher temperature zone, the cooling cylinder is cooled and the stirring device is operated, and the sensor is slightly lower than the lower limit set temperature. When a high predetermined temperature is detected, the cooling is stopped for a predetermined time and only the operation of the stirrer is performed, and after the predetermined time elapses, it is cooled to the lower limit set temperature again For performing, with assumed adequate overrun for shakes material also prevents overshooting of the cooling cylinder temperature.

According to the second aspect of the invention, in the frozen dessert manufacturing apparatus of the first aspect, when the device is restarted within a predetermined time after the device is stopped, the sensor detects a temperature lower than a predetermined temperature slightly higher than the lower limit set temperature. Then, the operation of the cooling and stirring device of the cooling cylinder is continued up to the lower limit set temperature, so that it is possible to prevent useless cooling stop when the user mistakenly stops the device and immediately restarts it.

Further, in the invention of claim 3, a hopper for storing and cooling the mix, a cooling cylinder for appropriately cooling the mix supplied from the hopper, and a heating device for heat sterilizing the cooling cylinder and the hopper. In a frozen dessert manufacturing apparatus including a cylinder sensor that indirectly or directly detects the temperature of the mix in the cooling cylinder, and a hopper sensor provided in the hopper, a cylinder sensor is used during heat sterilization of the cooling cylinder and the hopper. When a predetermined temperature lower than the sterilization set temperature is detected, the heating of the cooling cylinder is stopped, and when the hopper sensor detects the sterilization set temperature, the heating of the cooling cylinder is restarted, so that the hopper and the cooling cylinder are restarted. Appropriate heat sterilization can be performed on any of the above mixes.
Becomes possible.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 is a schematic side view of the internal configuration of a soft serve ice cream producing apparatus according to an embodiment of the present invention, FIG.
3 is a front view of the frozen dessert manufacturing apparatus, and FIG. 3 is a refrigerant circuit diagram of the frozen dessert manufacturing apparatus. In the apparatus of the present embodiment, two types of soft ice cream, for example, vanilla soft ice cream and chocolate soft ice cream are produced. It has two cylinders so that it can be. And
There are three types of soft ice cream that can be extracted: vanilla soft ice cream, chocolate soft ice cream, and mixed soft ice cream that is a mixture of these. Also, by changing the set temperature,
In addition to these three types of soft cream, frozen desserts called shakes can be sold. Soft-serve ice cream is about -8 ℃
The shake is manufactured in a temperature range of about -3 ° C.

First, in FIG. 1, 1 is a main body of the apparatus, 2 is a hopper for storing a raw material of frozen dessert (soft cream or shake), so-called mix, and has a hopper cover 3 which is detached at the time of replenishing the mix, and around the hopper 2. The mix is kept cool by the hopper cooling coil 4 wound around. Further, the impeller 5 provided at the inner bottom portion is rotationally driven even when a predetermined amount or more of the mix is put in the hopper 2 and the hopper cooling coil 4 is heat-sterilized by a refrigerant gas that flows in the reverse direction of cooling, that is, hot gas. It Reference numeral 7 denotes a mix level sensor for detecting whether or not the amount of the mix in the hopper 2 is equal to or more than a predetermined amount. The mix level sensor 7 is composed of a pair of conductive electrodes (may be of a capacitance type). The flow of hot gas is stopped or the impeller is not rotated so as not to conduct the heat sterilization process described later.

Reference numeral 8 denotes a cooling cylinder for manufacturing a frozen dessert by rotating and stirring a mix, which is appropriately supplied from the hopper 2 by the mix supply device 9, by a beater 10, and an evaporator 11 is arranged around the cooling cylinder. The beater 10 is rotated via a beater motor 12, a drive transmission belt, a speed reducer 13, and a rotation shaft. The manufactured frozen dessert is taken out by operating the take-out lever 15 arranged on the freezer door 14 to move the plunger 16 up and down to open the extraction path 17. Here, in this apparatus, as shown in FIG. 2, three take-out levers are provided.

That is, the left take-out lever 15A is for vanilla,
The take-out lever 15B on the right is for chocolate, and the take-out lever 15C at the center is for a mix of vanilla and chocolate. Therefore, another cooling cylinder 8B is provided as shown in FIG.
A is for vanilla soft ice cream or shake production, and cooling cylinder 8B is for chocolate soft ice cream or shake production. The take-out lever 15A and the cooling cylinder 8A communicate with each other via the extraction passage 17A and take out again. The lever 15B and the cooling cylinder 8B extract vanilla and chocolate or a shake as a one-to-one correspondence in which the lever 15B and the cooling cylinder 8B communicate with each other via the extraction passage 17B. Further, the take-out lever 15C is in communication with both cooling cylinders 8A and 8B via the extraction passage 17C, so that mix shake or mix soft ice cream can be extracted. When picking up frozen desserts, each beater 10
(The other one is not shown) rotates to serve the function of delivering frozen desserts.

Next, a refrigerating apparatus for cooling the hopper 2 and the cooling cylinder 8 will be described. 18 is a compressor, 19 is a refrigerant discharged from the compressor 18 during a refrigerating cycle (solid line state) and during a heating cycle (dotted line state). A water-cooling condenser for switching the flow direction to the opposite side by 20 is a water-cooled condenser, which condenses and liquefies the high-temperature, high-pressure refrigerant gas flowing through the check valve 21 into a liquefied refrigerant. The liquefied refrigerant is divided into two parts when it comes out of the dryer 23 through the check valve 22, and one of them flows into the evaporator 11 through the cooling cylinder valve 24 and the cooling cylinder capillary tube 25, where it is evaporated and vaporized, and the cooling cylinder 8 To cool. Then, the other flows into the hopper cooling coil 4 through the cooling hopper valve 26 and the above-mentioned hopper capillary tube 27, and similarly evaporates and evaporates here to cool the hopper 2,
It exits via a capillary tube 28 described later.

After cooling the cooling cylinder 8 and the hopper 2, the refrigerant gas merges with the accumulator 30 and forms a refrigeration cycle in which the refrigerant gas returns to the compressor 18 via the four-way valve 19 so that the refrigerant flows in the solid line direction. Driving is performed. By the way, in this cooling operation, the cooling cylinder 8 and the hopper 2 are cooled and maintained within a predetermined set temperature range (cooling cylinder: about -3 ° C to -8 ° C, hopper: 5 ° C to 10 ° C) in order to obtain a good quality frozen dessert. There is a need to. Therefore, a cylinder sensor 31 for detecting the temperature of the cooling cylinder 8 is provided, and by this sensor 31, the cooling cylinder valve 24 is turned on (open) and the compressor 18 is turned on at a preset upper limit temperature to perform cooling, and the lower limit is set. Opening and closing the cooling hopper valve 26 and the compressor 1 at the set temperature
Turn ON / OFF of 8. However, the control of the cooling cylinder 8 is prioritized, and the cooling cylinder valve 24
Is turned off, and the cooling hopper valve 26 is turned on. The cylinder sensor 31 is
It detects the mix temperature in the cooling cylinder 8 indirectly or directly. In the present embodiment, it is provided on the outer wall surface of the cooling cylinder 8, but the temperature of the evaporator 11 wound around the cooling cylinder 8 is detected. Alternatively, the temperature of the mix may be directly detected.

After the product is sold under the cooling operation described above, when the store is closed, the mix is sterilized by the heating method. In this case, the refrigeration system is switched from the refrigeration cycle to the heating cycle operation. That is, the four-way valve 19 is operated to flow the refrigerant as shown by the dotted arrow. Then, the high-temperature, high-pressure refrigerant gas from the compressor 18, that is, the hot gas, is divided into two by way of the four-way valve 19 and the accumulator 30, one of which is directly connected to the evaporator 11 and the other of which is passed through the check valve 33 and the hopper cooling coil. Flow into 1. Then, heat is generated in each of them, and the cooling cylinder 8 and the hopper 2 are heat-sterilized at a predetermined sterilization temperature for a predetermined time. The liquefied refrigerants that have released heat are merged through the hot gas cylinder valve 34 and the hot gas hopper valve 35, respectively, and then the water-cooled condenser 20.
The gas is separated into liquid and the refrigerant gas passes through the reverse solenoid valve 36 and the reverse capillary tube 37 provided in parallel,
A heating cycle that returns to the compressor 18 via the four-way valve 19 is configured.

A sterilization / cooling sensor 38 for detecting the temperature of the cooling cylinder 8 is provided on the outer surface of the cooling cylinder 8 and detects the temperature of the internal mix through the cooling cylinder 8. It is a cylinder sensor. Then, at the time of heat sterilization, this sterilization / cooling sensor 38 is used,
The hot gas cylinder valve 34 and the compressor 18 are controlled to be turned on and off at the values of the preset upper and lower limits of a predetermined range so that the mix maintains the prescribed sterilization temperature. The sterilization / cooling sensor 38 measures the heating temperature, but it can be judged that the measured temperature is almost close to the mix heating temperature. The sterilization / heat retention sensor 38 indirectly or directly detects the mix temperature in the cooling cylinder 8, and in the present embodiment, the cooling cylinder 8 is used.
Although it is provided on the outer wall surface, the temperature of the evaporator 11 wound around the cooling cylinder 8 may be used, or the temperature of the mix may be directly detected.

The heating control of the hopper 2 uses the hopper sensor 32 as a sterilization / cooling sensor and controls ON / OFF of the hot gas hopper valve 35 and the compressor 18 at a set temperature value that is set. Further, based on the temperature detected by the cylinder sensor 38, the compressor 18 is turned on so as to be shifted to cooling after heat sterilization and maintained at a low temperature state to some extent, that is, a cold storage temperature (about + 8 ° C to + 10 ° C) until the next day's sale. Performs OFF control.

The cooling cylinder 8 has a supercooling sensor 40.
It is also attached to detect abnormally low temperature, and its function will be described later. Reference numeral 41 denotes a water-saving valve, which prevents the overload operation due to the refrigerant gas returning in a high temperature state and flowing into the compressor 18 at the end of the heating cycle due to the reduction of the heating load (cooling cylinder, hopper) during the heating cycle. A gas pressure sensor 42 for detecting the pressure of the refrigerant gas in the water-cooled compressor 20 is provided, and when a predetermined gas pressure value is exceeded, the water pressure saving valve 41 is opened by this gas pressure sensor 42, and water flows through the water supply passage 43 as indicated by the one-dot chain line arrow. The high temperature refrigerant gas radiates heat to adjust the suction pressure of the compressor.

Similarly, in order to control the high load operation of the compressor 18, a means for controlling the opening / closing of the reverse valve 38 is provided by the compressor motor current detecting means or the mix detection temperature of the cylinder sensor 38 as described later. ing. Reference numeral 44 is an electrical equipment box, 45 is a front drain receiver, and 46 is a faucet for supplying water during mix cleaning.

FIG. 3 shows a refrigerant circuit according to the present apparatus equipped with two cooling cylinders 8A and 8B, which is of type A (strawberry flavor shake or vanilla soft cream) and type B (melon flavor shake or chocolate soft cream). In accordance with the frozen dessert, the same major components as those shown in FIG. 1 are designated by A and B, respectively.

By the way, at the upper position of the freezer door 14 on the front of the apparatus body 1, as shown in FIG.
As shown in FIG. 4, the operation panel 50 is provided with two sets of switches having the same function and displays on the left and right around the sterilization switch 51 and the sterilization monitor display 52. That is, each set is an operation unit corresponding to a type A frozen dessert and a type B frozen dessert.

Now, each switch will be described. 5
When a cooling operation switch 3 is pressed, the cooling temperature of the cooling cylinder and the hopper is controlled to fall within a predetermined set temperature range to produce a frozen dessert. Reference numeral 54 denotes an energy-saving cooling operation switch, which is pressed in a time zone when the customer's feet are far away, and performs cooling control at a set value temperature with a slight shift up of the cooling temperature for economical operation. Reference numeral 55 denotes a defrost switch, which is pressed to collect the mix from the cooling cylinder 8 when softening the mix and taking it out, or when reproducing the softened ice cream that has not been sold for a long time, at which time hot gas is flown. The cooling cylinder 8 is heated to a certain temperature.

In this case, the temperature at the time of recovery is higher than that at the time of softening and regeneration. Reference numeral 56 is a washing switch, and when this is pressed, the beater 10 is rotationally driven for a predetermined limit time, and when the mix is collected after defrosting,
Alternatively, it is operated when the water is filled in the hopper 2 and the cooling cylinder 8 with the water tap 46 after collecting the mix.
When the defrost switch 55 is pressed while the cleaning switch 56 is being pressed during the collection of the mix, the defrost is started, the mix in the cooling cylinder 8 is softened, and then the beater 10 is rotated by pressing the cleaning switch 55 again. And then discharged.

On the other hand, when the defrost switch 55 is pressed while the cooling operation switch 53 is being pressed during softening and regeneration of the mix, the softening of the mix is automatically changed to recooling. Reference numeral 51 denotes a sterilization switch, which is pressed at the end of the day's business and enters a heating sterilization process of a cooling cylinder and a hopper by hot gas.

When heat-sterilizing the mix, + 68 ° C.
Since there is a stipulation that the heating temperature is 30 minutes or more, in the present embodiment, the temperature is 70 ° C. or more for about 30 minutes. This sterilization process starts from stage 0 at the start of sterilization to 4 at the end of sterilization.
Sterilization monitor lamp L that gradually flashes in stages
0, L1, L2, L3, L4 are provided, and the sterilization monitor lamp L4 is a sterilization completion lamp. A stop switch 57 stops all control operations (cooling, defrosting, cleaning, sterilization).

Reference numeral 58 is a mix replenishing lamp, which lights up when the mix is not in contact with the mix level sensor 7 in the hopper 2 described above, and informs the user of the replenishment of the mix. Reference numeral 59 denotes an abnormality alarm lamp, which blinks or lights up when various abnormal situations occur in addition to the above-mentioned mix exhaustion (in this case, blinking and indication of sterilization preparation failure). The same applies to each switch and each indicator lamp on the right side.

The contents reported by the abnormality alarm lamp 59 include water cutoff, beater motor overload relay (OL
R) operation, supercooling, softening alarm, poor sterilization preparation, poor cold insulation, power failure, sterilization failure, sensor failure, etc., but these are arranged inside the front lower plate 1a of the apparatus main body 1 Codes are displayed on the 7-segment display 61 provided corresponding to each device on another operation panel 60 shown in FIG. 5, respectively. The code display content is sent and displayed by the changeover switch 62. Reference numeral 63 is a reset button of the beater motor 12, and 64 is a soft / shake changeover switch.
Reference numerals 75 and 76 are temperature adjusting volumes corresponding to shake and software.

FIG. 6 is a block diagram of a system controller mounted on the frozen dessert making apparatus according to the present embodiment. This system controller is a cooling cylinder 8A arranged on the left and right when viewed from the front of the frozen dessert making apparatus. , 1 corresponding to 8B
Although there are two in total, only one of them, the control device of the right system, is shown in the figure, and the others are omitted. And this one control device is a control board 70A.
And the other control device is also another control board 70B.
Is configured.

The system controller will be described in detail. The cylinder sensor 31, the hopper sensor 32, the supercooling sensor 40,
A signal from the sterilization / cooling sensor 38 and a signal from the current sensor 72 that detects the compressor motor current 71 and the beater motor current are input to the A / D converter 74 via the amplification circuit 73, and the A / D conversion is performed. In the case of soft ice cream production, the container 74 sets an output signal from the soft adjustment volume 75 for setting and adjusting the cooling temperature of the cooling cylinder 8 to suit it and in the case of ice cream shake production, sets the cooling temperature suitable for it. The output signal from the shake adjusting volume 76 to be adjusted is also input and A / D converted.

The supercooling sensor 40 will be described below. If the mix is not replenished near the end of business and only the mix contained in the cooling cylinder 8 is continuously sold, the mix in the cooling cylinder 8 will be gradually increased. Less,
Cooling load (mix) decreases and supercooling occurs. Then, the evaporator 11 is cooled to a predetermined temperature, and the supercooling sensor 40 performs a detection operation to control to enter the defrost.

After the defrosting, when the mix is not added, it becomes a supercooling again, and when the number of times of supercooling is two, it has a safety protection function of stopping all the operations. Further, the current sensor 71 related to the compressor 18 follows the suction pressure of the compressor 18. That is, at the end of the heating cycle, the heat exchange in the cooling cylinder 8 decreases, the heat returns as high-temperature high-pressure gas, and the compressor 18 becomes overloaded. This increase in current value is detected, the reverse valve 36 is closed, the flow rate of the circulating refrigerant is adjusted, and the load is reduced.

Further, the reverse valve 36 is a sterilization / cooling sensor 3
The mix temperature detected by 8 is opened when a predetermined temperature (60 ° C.) is detected. Then, the current sensor 72 related to the beater motor 12 detects the current of the beater motor 12 that changes depending on the hardness of the mix due to cooling, and when the temperature is too high, the cooling is stopped and stirring is continued. When the frozen dessert reaches the set temperature, the stirring is continued. Is related to the function of reducing the load when the beater motor 12 is restarted. The CPU (Central Processing Unit) 77 is the AD converter 7
From 4, the processing according to the converted digital signal is executed.

On the other hand, the mix level sensor (electrode) of the mix level sensor (electrode) for the CPU 77 via the buffer 78 is the mix cut signal, the water cutoff signal, the compressor 18 overload signal, the beater motor 12 overload signal, the type A frozen dessert extraction signal, and the type B frozen dessert extraction signal. ) 7, mix-out detection circuit 79, water cutoff switch 80, compressor overload relay (OLR) switch 81, beater motor overload relay (OLR) switch 82, first extraction switch (extraction SW1) 83, second extraction switch (extraction) Input with SW2) 84. Further, the buffer 78 receives the power frequency signal from the power frequency detection circuit 8
The key input from each operation switch of the operation panel 50 is input via the switch 5, and is input to the CPU 77.

Therefore, the CPU 77 executes processing according to the digital signal from the AD converter 74 and the signal from the buffer 78, and outputs a device start / stop command, a display signal and the like. That is, for the device start / stop instruction, the buffer 8
A control command is output from the CPU 77 via the relay R
Y1, RY2, RY3, RY4, RY5, RY6, RY
7, RY8, RY9 are operated, and their operation contacts RY1, R
Y2, RY3, RY4, RY5, RY6, RY7, RY
8, RY9, as shown in FIG. 7, a compressor motor (CM) 18M, a beater motor (BM) 12, a mix stirring motor (KM) 6, a cooling cylinder valve (FS) 24,
The cooling hopper valve (FH) 26, the hot gas cylinder valve (HS) 34, the hot gas hopper valve (FH) 35, the four-way valve (QV) 19, and the reverse valve (RV) 36 are drive-controlled.

The sterilization progress status, mix shortage, device abnormality alarm, etc. are lit or blinked on the display LED 87, and the details of the abnormality are displayed on the 7-segment display 61.
Is displayed in. Further, the information processed and executed by the CPU 77 is mutually communicated with the other board 70B, that is, the system controller of the type B frozen dessert, through the transmission line 88.

As described above, the frozen dessert manufacturing apparatus according to the present embodiment has the apparatus configuration and the control circuit configuration shown in FIGS. 1 to 7. The actual condition of the operating state will be described in detail below.

(I) Cooling operation or energy-saving cooling operation (I) -1 Normal cooling operation By pressing the cooling operation switch 53, a normal refrigeration cycle, that is, the lower limit temperature (set value) of the cooling cylinder 8 by the cylinder sensor 31 is set. , Upper limit temperature (set value + 0.5 ° C)
The ON / OFF control of the compressor 18, the cooling cylinder valve 24, the cooling hopper valve 26 and the beater motor 12 is performed so that the hopper 2 is cooled in the temperature range of 8 ° C. to + 10 ° C. by the hopper sensor 32. As a result, a shake or soft ice cream is produced in the cooling cylinder 8 and extracted each time it is sold.

(I) -2 Cooling control correction operation when cooling is insufficient In this cooling operation (sales state), the lower limit temperature is too low to continue cooling, and the lower limit is reached even after a predetermined limit time (30 minutes) has passed. If the temperature is not cooled to the set temperature, the set temperature is shifted up a little, the cooling operation control is performed using this shift temperature set value as a new set temperature, and if it is not further satisfied, the set temperature is shifted up a little and the predetermined limit set temperature ( The temperature is automatically and gradually shifted to 0 ° C. to prevent deterioration of the quality of the shake or soft serve ice cream due to overcooling, and the load and operation rate of the compressor 18 are reduced to protect it.

(I) -3 Energy-saving cooling operation When the user selects the energy-saving operation switch 54 during night hours or during other times when the user is far away,
The set temperature is shifted up from the normal refrigeration cycle, and the cooling operation control based on the set temperature is performed (energy-saving cooling operation).

(I) -4 Cooling operation at the beginning of sales After heat sterilization at the end of business on the previous day, at the beginning of sales on the next day,
Until a certain number (40 pieces) of shakes or soft ice cream is sold, the set temperature is shifted down (set value-0.2 ° C) to control cooling. As a result, the heat-sterilized mix is cooled to a temperature lower than that of the fresh mix, and a good soft ice cream without stickiness can be taken out from the initial stage of sale. In addition, a shake having an appropriate hardness can be taken out.

(II) Sterilization / cooling operation (II) -1 Sterilization operation When the sterilization switch 52 is pressed, it is started under the condition that the mix is not broken, and the four-way valve 19 switches from the refrigeration cycle to the heating cycle. The gas is supplied to the cooling cylinder 8 and the hopper 2 and sterilized by heating. Both the cooling cylinder 8 and the hopper 2 are sterilized so that the total heating time of about 40 minutes is satisfied in the heating temperature range of + 70 ° C. to + 72 ° C. The compressor 18, the hot gas cylinder valve 34 are operated by the functions of the cold insulation sensor 38 and the hopper sensor 32. The hot gas hopper valve 35 is ON / OFF controlled.

The process of heat sterilization is displayed by sterilization 0 to 4 LEDs, and 0 LED blinks at the start, and when the temperature of the cooling cylinder 8 reaches + 72 ° C., 1 LED blinks and 0 LED switches from blinking to lighting. While heating at + 70 ° C or higher for 13 minutes. 1 LED keeps blinking, and after 13 minutes, 1 LED switches to lighting and 2
Move on to blinking LED. 3LED, 4LE every 13 minutes
Following the blinking of D, the prescribed heating state of about 40 minutes (actually 13 minutes × 3 = 39 minutes) was performed at the time of blinking the 4LEDs, which means that the sterilization operation is ended and the cold preservation operation is started. That is, 4
The blinking of the LED indicates that the cold storage operation is started.

(II) -2 Cooling operation In the cooling operation that continues from the sterilization operation, a predetermined time (90
Min), under the condition that the temperature is below the predetermined temperature (+ 13 ℃),
The sterilization / cooling sensor 38 and the hopper sensor 32 control ON / OFF of the compressor motor 18M, the cooling cylinder valve 24, and the cooling hopper valve 26 so that the cooling cylinder 8 and the hopper 2 are kept cold in the temperature range of + 8 ° C to + 10 ° C. To do.

(III) Washing Operation When the store is closed, the washing switch 56 is pressed to operate.
The beater motor 12 is turned on for a predetermined period of time, the take-out lever is opened, and the mix is collected (discharged). Further, after the collection, the hopper 2 and the cooling cylinder 8 are supplied with water by the water supply plug 46 and washed by stirring with the beater 10.

(IV) Defrost (mix softening action) operation (IV) -1 Defrost during mix recovery In order to facilitate mix recovery during the cleaning operation, the cooling cylinder 8 is heated to a predetermined temperature (+ 5 ° C.) with hot gas. Warm
Soften the mix. It operates by pressing the defrost switch 55, and the heating control is performed by the sterilization / cooling sensor 38.
The ON / OFF control of the hot gas cylinder valve 34 is performed.

(IV) -2 Defrost during cooling (energy saving) operation When the defrost switch 55 is pressed during cooling operation, it operates and heats the cooling cylinder 8 with hot gas to raise the mix to a predetermined temperature (+ 0 ° C). Warm and then continue the cooling operation to cool the mix to the set temperature again. Similarly, in the heating control, the sterilization / cooling sensor 38 controls ON / OFF of the hot gas cylinder valve 34.

In addition to the above operations, there are required protective operations. (V) Protective operation of four-way valve To prevent liquid sealing and chatter noise in the refrigerant pipe line occurring when switching the four-way valve 19 related to switching of the cooling cycle ← → heating cycle, immediately after the switching, cooling for a predetermined time (30 seconds) The cylinder valve 24, the cooling hopper valve 26, the H.V. G cylinder valve 3
4, H.I. The G hopper valve 35 is opened.

(VI) Beater Motor Overcurrent Protection When an overload condition is caused by frozen dessert hardened by overcooling, the current sensor 72 judges the load condition by detecting the current value of the beater motor 12, and the current When the value exceeds the set value of 4.8A, only cooling is stopped (compressor motor (18M) OFF) and the stirring operation is continued. When the stirring resistance of the frozen dessert in the cooling cylinder 8 decreases and the set value becomes 4.2 A or less, recooling (compressor motor (18M) OFF) is performed and the cylinder sensor 31 reaches the set temperature or is set from the start of cooling. It continues until time passes. This avoids the inconvenience that the beater motor 12 falls into an overloaded state.

(VII) Operation protection of compressor during heat sterilization (control of reverse valve) In the latter stage of heating, as the heating load decreases, the reverse valve 36
Adjusts (reduces) the amount of gas sucked into the compressor 18
The operating load of the compressor 18 is reduced. Therefore, the current of the compressor motor 18M is detected by the current sensor 71, and the reverse valve 36 is turned off when the predetermined value is 5.3 A or more.
Then, the reverse valve 36 is turned on when the predetermined value is 3.5 A or less.

Further, the reverse valve 36 is the cylinder sensor 3
The opening / closing control is also performed according to the mix temperature detected by No. 1 so that the temperature raising operation in the cold region can be achieved in the same manner as in the normal temperature region, and the details will be described later.

The above operations (I) to (VII) are shown in FIG.
Is executed under the system control device of the above, and the flow of the entire processing operation is performed according to the main flowcharts of FIGS. Then, FIGS. 10 and 11 are flowcharts of the cooling operation, FIG. 12 is a flowchart of the restart, and FIG.
3, FIG. 14 is a flow chart of the sterilization operation, FIG. 15 and FIG.
6 shows a flow chart of the cold insulation operation, and FIG. 17 shows a time chart of equipment related to both operations.

First, a description will be given according to the main flow charts of FIGS. It is judged whether or not the stop switch 57 is pressed (101), and if YES, all operation flags are set and all operations are stopped (102). If NO, it is judged whether the operation switch 53 or the energy saving switch 54 is pressed (103), and if YES, the sterilization operation flag is checked (104), and the sterilization operation flag is reset (N).
If it is O), the operation / energy saving operation flag is set, and other operation flags are reset (105).

If the sterilization operation flag is set and the sterilization operation is in progress, the operation / energy saving operation flag is not set.
If the judgment (103) is ON, the sterilization switch 5
It is determined whether or not 1 is pressed (106), and if YES, it is determined whether or not the mix is out (107). If it is not in the mix (NO), the sterilization operation flag is set and the other operation flags are reset. (108).

If the mix is YES, the sterilization preparation failure display is output (109) and the sterilization operation flag is not set. The display of the sterilization preparation failure is made by blinking the abnormality warning display lamp 59 and the code can be displayed on the 7-segment display 61. If the judgment (106) is ON, it is judged whether or not the cleaning switch 56 is pressed (110), and if the judgment is YES, the sterilization operation flag is checked (1
11) If the sterilization operation flag is reset (NO),
The washing operation flag is set and the other operation flags are reset (112).

If the sterilization operation flag is set and the sterilization operation is in progress, the cleaning operation flag is not set. If the determination (110) is NO, it is determined whether or not the defrost switch 55 has been pressed (113), if YES, the sterilization operation flag is checked (114), and if it is ON (the sterilization operation flag is reset), cooling is performed.・ Look at the energy saving flag or the cleaning operation flag (1
15) If either flag is set (Y
ES), defrost operation flag is set (11)
6).

In this way, each operation flag is set by operating each switch. Then, each operation is executed by this set flag. That is, the cooling / energy-saving operation flag is checked (117), if the flag is set, the cooling / energy-saving operation is performed (118), and if reset, the cooling / energy-saving operation is stopped. Looking at the sterilization operation flag (119),
When the flag is set, the sterilization operation is performed (120), and when it is reset, the sterilization operation is stopped.

Next, looking at the cleaning operation flag (123),
When the flag is set, the cleaning operation is performed (124), and when the flag is reset, the cleaning operation is stopped. Looking at the defrost operation flag (125), if the flag is set, the defrost operation is performed (126), and if it is reset, the defrost operation is stopped. After each operation is performed, the protection operation of the four-way valve 19 (127), the overcurrent protection operation of the beater motor 12 (128), and the control operation of the reverse valve 36 (129) are executed.

The processing procedure of the cooling operation is performed according to the flowcharts shown in FIGS. First, in the cooling operation, the soft / shake changeover switch 64 is used to select whether to produce soft ice cream or shake (201). If it is a shake, it is determined whether the pull-down end flag is set (1) (20).
2). When the pull-down end flag is reset (0) (NO), it is determined whether the overrun adjustment end flag is set (1) (203). When the overrun adjustment end flag is reset (0) (NO), it is determined whether the temporary stop flag is set (1) (204). When the temporary stop flag is reset (0) (NO), it is determined whether the temperature detected by the cylinder sensor 31 is lower than the lower limit set temperature + 2 ° C. (205). At the start of cooling, the temperature of the shake is high, so the result is NO and the pause pass flag is reset (20
6) and proceed to the flowchart shown in FIG.

Here, it is judged whether or not the cooling cylinder valve 24 is ON (207), and if cooling is started, NO is determined.
It is determined whether the temperature detected by the cylinder sensor 31 is higher than the upper limit set temperature (lower limit set temperature + 0.5 ° C) (20
8). Since YES at the start of cooling, the cooling cylinder valve 24 is turned on (209) and the compressor 18 is turned on (21
0), the beater motor 12 is turned on (211), the cooling determination flag is set (212), and the beater stop delay timer is reset (213).

Further, since the cooling cylinder valve 24 is turned on, the determination (207) as to whether or not the cooling cylinder valve 24 is turned on becomes YES from the next time, and whether the temperature detected by the cylinder sensor 31 is lower than the lower limit set temperature or not. Judge whether (21
4). Here, at the start of cooling or in the middle of cooling, since the temperature is higher than the lower limit set temperature, the result is NO, the cooling cylinder valve 24 is turned on, and the compressor 18 is sequentially turned on.
(210), the beater motor 12 is turned on (211), the cooling determination flag is set (212), and the beater stop delay timer is reset (213). That is, the cylinder sensor 3
If the detected temperature of 1 is higher than the upper limit set temperature, cooling is performed. Then, after processing the hopper tank cooling subroutine (215) and the cooling protection subroutine (216), the process returns.

When the temperature detected by the cylinder sensor 31 becomes equal to or lower than the lower limit set temperature + 2 ° C. (YES in 205), it is determined whether the temporary stop pass flag is set (1) (217). Here, since the temporary stop pass flag is reset (0), the temporary stop flag is set (1) (218). After that, the cooling cylinder valve 24 is turned off (219) and the compressor 18 is turned off (22
0), the beater motor is turned on (221), the overrun adjustment timer is operated (222), and it is determined whether the overrun adjustment timer has passed 5 minutes (223).

If 5 minutes have not elapsed (N
O), returns through the hopper tank cooling subroutine (215) and the cooling protection subroutine (216), and when the time has passed (YES), the overrun adjustment end flag is set (224), and the hopper tank cooling subroutine (21
5) and the cooling protection subroutine (216).
That is, when the cylinder sensor 31 becomes lower than the lower limit set temperature + 2 ° C., the cooling of the cylinder 8 is stopped for 5 minutes and only the beater motor 12 is operated.

After that, since the temporary stop flag is set (1), the temporary stop flag is set (1).
If it is determined (204), YES, the cooling cylinder valve 24 is turned off (219), and the compressor 1
8 OFF (220), beater motor 12 ON (22
1), operate the overrun adjustment timer (222),
After that, the same processing as described above is performed.

When the overrun adjustment end flag is set (1) (224), it is determined whether the overrun adjustment end flag is set or not (203), YES.
Then, the process proceeds to the flowchart of FIG. Here, since the cylinder sensor 31 is higher than the upper limit set temperature, the cylinder 8 is cooled again. When the cooling of the cylinder 8 progresses and the cylinder sensor 31 becomes lower than the lower limit set temperature, the cooling cylinder valve 24 is turned off (225) and the compressor 18 is turned off.
(226), the pull-down end flag is set (22
7). That is, when the cylinder sensor 31 becomes lower than the lower limit set temperature, the cooling is stopped and the pull-down ends.

After the cooling is stopped, it is determined whether the beater stop delay timer has passed 60 seconds (228). If the timer has not elapsed, the beater stop delay timer is activated (229) and the beater motor 12 is turned on (23
0) is continued. After that, when 60 seconds have passed (YE
S), the beater motor 12 is turned off (231), the cooling determination flag is reset (232), the hopper tank cooling subroutine (215) and the cooling protection subroutine (2).
Return through 16). That is, 60 after the compressor 18 is stopped
The beater motor 12 is turned on for a second.

When the pull-down is completed, it is judged whether the pull-down completion flag is set (1) (20
2) Since the pulldown end flag is set (1) (YES), it is determined whether the cooling determination flag is set (1) (233). If the cooling determination flag is set (1) (YES), the process proceeds to the flowchart of FIG. 11 described above. If the cooling determination flag is reset (0), the beater motor intermittent timer is activated (234) and the beater motor is turned on. It is determined whether the flag is set (235).

Since the beater motor ON flag is not set here (NO), the beater motor 12 is turned off.
Then, it is determined whether or not the beater motor intermittent timer has elapsed for 4 minutes (236) (237). When the beater motor intermittent timer has not elapsed for 4 minutes (NO), the process proceeds to the flowchart of FIG. 11 and when 4 minutes have elapsed (YES), the beater motor ON flag is set (238) and the beater motor intermittent timer is reset (239).

The beater motor ON flag is set. If it is determined whether the beater motor ON flag is set (235), the answer is YES and the beater motor is ON.
(240). Then, it is determined whether or not the beater motor intermittent timer has passed 30 seconds (241). If 30 seconds have not passed (NO), the process proceeds to the flowchart of FIG. 11, and if 30 seconds have passed (YES), the beater motor ON flag is reset. (242), reset the beater motor intermittent timer (243), and set the cooling determination flag (24
4) Do.

That is, the compressor 1 after the pull-down is completed.
During the stop, the beater motor 12 repeats the stop for 4 minutes and the operation for 30 seconds. Further, since the cooling determination flag is set after the beater motor 12 is operated for 30 seconds, the cylinder sensor 31 cools the compressor 18.

FIG. 12 is a flowchart of the cooling operation after the cooling is stopped. First, it is determined whether the cooling operation flag is set (245). If the cooling operation flag is not set (NO), it is judged whether or not the temporary stop pass timer has elapsed for 3 minutes (246), and if the three minute has not elapsed (NO), the temporary stop pass timer is operated (247). , Set the pause path flag (24
8) Go back.

Further, it is judged whether the pause pass timer has passed 3 minutes (246), 3 minutes have passed (YES).
In this case, the temporary stop pass flag is reset (249) and returned, and in the determination (245) as to whether or not the cooling operation flag is set (1) (YES), the temporary stop pass timer is reset. (250) Return.

That is, the temporary stop pass flag is set for 3 minutes after the cooling is stopped, but is reset after 3 minutes have elapsed. As a result, when the cooling operation is restarted within 3 minutes after the cooling is stopped, it is judged whether or not the temperature detected by the cylinder sensor 31 in the cooling operation is lower than the lower limit set temperature although the cooling operation is being performed (205), and the operation is suspended. When the pass flag is set (1), it is judged (217) that the temperature detected by the cylinder sensor 31 is within the lower limit set temperature + 2 ° C, and the pause flag is set. However, the cylinder sensor 31 cools down to the lower limit set temperature at once.

The processing procedure of the sterilization operation is shown in FIGS.
The operation timing of the related equipment at that time is as shown in FIG. The beater motor 12 is continuously operating during the sterilization operation. The four-way valve 19 is also in continuous operation. Therefore, the beater motor 12 is turned off.
N, the four-way valve is turned on (301), and the sterilization monitoring timer determines whether or not the elapsed time after the start of sterilization is 2 hours (302).

This is because there is a possibility that the quality of the mix will change due to heating, so by setting the limit time,
When 2 hours have passed (YES), a sterilization failure alarm is output (303), and after the lapse of time, the sterilization operation flag is reset, the cold insulation operation flag is set (304), and the cold insulation operation is started. If the judgment (302) is NO, the sterilization start timer is operated (305) and it is judged whether or not the hopper temperature rising end flag is set (1) (30).
6).

Here, since the temperature of the hopper has not been raised, the result is NO. Next, the HG cylinder valve 34 is turned on.
Whether or not (307) the HG cylinder valve 34 is ON (YES), the sterilization / cooling sensor 38 has a temperature of 60 ° C.
It is determined whether or not the above (308). When the HG cylinder valve 34 is OFF (NO), it is judged whether the sterilization / cooling sensor 38 is 55 ° C or lower (309).

When the HG cylinder valve 34 is ON and the sterilization / cooling sensor 38 is 60 ° C. or higher (YES), or when the HG cylinder valve 34 is OFF and 55 ° C. or lower (NO), the HG cylinder valve is 34 OFF (3
10) Do. When the HG cylinder valve 34 is ON and the sterilization / cooling sensor 38 is less than 60 ° C. (NO), or when the HG cylinder valve 34 is OFF and exceeds 55 ° C. (YES), the HG cylinder valve 34 ON (3
11). When the HG cylinder valve 34 is ON, the compressor motor 18M is also ON.

Next, it is judged whether or not the HG hopper valve 35 is ON (337), and the HG hopper valve 35 is ON (Y).
In the case of ES), it is determined whether the hopper sensor 3232 is 72 ° C. or higher (338). In addition, the HG hopper valve 35 is O
If it is FF (NO), the hopper sensor 32 is 70 ° C.
It is determined whether or not the following (339).

When the HG hopper valve 35 is ON and the hopper sensor 32 is 72 ° C. or higher (YES), or when the HG hopper valve 35 is OFF and the hopper sensor 32 is over 70 ° C. (NO), The HG hopper valve 35 is turned off (340), and the hopper temperature raising flag is set (1) (341).

When the HG hopper valve 35 is ON and the hopper sensor 32 is lower than 72 ° C. (NO), or when the HG hopper valve 35 is OFF and the hopper sensor 32 is 70 ° C. or lower (YES. ) If H
The G hopper valve 35 is turned on (342). When the HG hopper valve 35 is ON, the compressor motor 18M
Also turns on.

When the hopper temperature increase is completed, the hopper temperature increase end flag is set (1), so it is judged (30
It becomes YES in 6), and it is judged whether the HG cylinder valve 34 is ON (343). HG cylinder valve 34 is ON
If YES (YES), the sterilization / cold sensor 38 is 72 ° C.
It is determined (344) whether or not the above. When the HG cylinder valve 34 is not ON (NO), it is determined whether the sterilization / cooling sensor 38 is 70 ° C. or lower (345).

When the HG cylinder valve 34 is ON and sterilization /
Cold sensor 38 is 72 ° C or higher (YES), or HG
Sterilization / cooling sensor 38 when the cylinder valve 34 is OFF
If the temperature exceeds 70 ° C (NO), the HG cylinder valve 3
4 is turned off (346). In addition, the HG cylinder valve 34
Is ON and the sterilization / cold sensor 38 is lower than 72 ° C. (NO), or the HG cylinder valve 34 is OFF and the sterilization / cold sensor 38 is 70 ° C. or lower (YES), the HG cylinder valve 34 is turned on. It is turned on (347). HG
When the cylinder valve 34 is ON, the compressor motor 18
M also turns on.

Then, the control of the hopper 2 described above is started. That is, the process shifts to the determination (337) as to whether the HG hopper valve 35 is ON, and the same as described above. This is because the sterilization / cooling sensor 38 temporarily stands by at 60 ° C., and after the hopper sensor 32 reaches 72 ° C., the sterilization / cooling sensor 38 is heated to 72 ° C.

The sterilization step counter is used to divide the sterilization process into five divisions of 0 to 4, and the progress of each is represented by numbers. Therefore, first, when heating is started, the HG cylinder valve 34 and the HG hopper valve 35 are turned on and the temperature starts to rise. Initially, the sterilization step counter is not 4, so
The judgment (315) becomes NO, and the step counter 1
Since the judgment (316) is NO, unless the HG cylinder valve 34 and the HG hopper valve 35 are both turned OFF in the judgments (317) and (318), that is, the sterilization / cooling sensor 38 and the hopper sensor 32 are 72. It is judged that the sterilization step counter is 0 until the temperature reaches ℃ (3
19), sterilization 0 LED blinks, sterilization 1 to 4 LE
Turn off D (320).

In other words, when the temperature reaches 72 ° C., the sterilization step counter is counted up (321) and the sterilization step counter becomes 1. When the determination (316) is YES, the sterilization / cooling sensor 38 and the hopper sensor 32
It is judged whether 32 is 70 ° C or higher (322) (3
23) Mainly in the case of 70 ° C. or higher, it is judged whether or not the duration time has passed 13 minutes (324), and if not, the sterilization timer is integrated (325), and the sterilization step counter still remains. It is determined that the number is 1 (326), and the sterilization 0 LED is turned on, the sterilization 1 LED is blinked, and the sterilization 2 to 4 LEDs are turned off (327).

Here, the sterilization timer (13-minute integration timer) integrates the timer when the sterilization / cooling sensor 38 and the hopper sensor 32 are 70 ° C. or higher, and stops the timer integration when the temperature is lower than 70 ° C. If 13 minutes have passed in judgment 324, the sterilization step counter is incremented to 2 (3
28) Clear the sterilization timer (329). When it is judged that the sterilization step counter is 2 (330), sterilization 0, 1 LED is lit, sterilization 2 LED is blinking, and sterilization 3 and 4 LEDs are turned off (331).

Thereafter, in the same manner, judgment (332) and processing (3
33) By (334), the process is stepped up every 13 minutes, and the sterilization 3LED and the sterilization 4LED are blinked.
Therefore, when the sterilization step counter reaches 4, the sterilization process ends, which means that sterilization 0 to 3 LED: lighting, sterilization 4
Displayed by blinking LED. When the self-sterilization process ends in the judgment (315), the self-sterilization end flag is set,
Processing (335) of transferring to another board 70B by communication is performed.

On the other hand, the heat sterilization process of the other cooling cylinder 8B and the hopper 2B is also performed, and when the other sterilization process is completed, the sterilization completion flag is set from the other substrate 70B and sent by communication. . Therefore, it is judged whether or not the sterilization end flag is sent from the other substrate 70B (336), and when the sterilization process of the own substrate and the sterilization process of the other substrate 70B are completed, the sterilization operation flag is set. Process to set the cool operation flag (3
04). In this way, the sterilization operation is completed, and the operation becomes a cold preservation operation.

Here, processing (335) and judgment (33)
6), the flow of the processing (304) produces the following advantages. That is, in the case of the two cooling cylinders 8A and 8B, the central extraction lever 15C has extraction paths 17C and 17C (see FIG. 3) that communicate with the roughly released cylinders 8A and 8B. Therefore, when the operation and stop of the sterilization process of each cooling cylinder 8A and 8B are controlled independently, when one is in the heat sterilization and the other is in the cooling operation, the central plunger 15 is cooled on the cooling side. Due to the influence of the mix, there is a possibility that a portion that does not reach the sterilization temperature is generated on the heating side, resulting in poor sterilization. By communicating with each other the sterilization process status of the other party, it is confirmed that both sterilization processes have been completed and the sterilization operation flag is reset for the first time, that is, the sterilization operation is stopped together. Therefore, complete sterilization is possible.

The processing procedure of the cold insulation operation is performed according to the flowcharts of FIGS. Sterilization / cold sensor 38
Alternatively, the hopper sensor 32 determines whether or not the temperature is 13 ° C. or higher (401) (402), and if the temperature is 13 ° C. or higher, the safety monitoring timer is activated to determine whether or not 90 ° C. or higher has continuously passed for 90 minutes. A determination is made (403), and when the time has passed, a cold insulation defect display is output (404). After the sterilization process is completed, the refrigeration cycle is switched to and cooling is started (pulldown).
If there is no abnormality in the cooling operation, it is considered that the temperature reaches 13 ° C. in about 90 minutes, and it is determined whether there is a cold insulation defect. Therefore, when the sterilization / cooling sensor 38 and the hopper sensor 32 become lower than 13 ° C. within 90 minutes, the security monitoring timer is cleared (405). In other words, the operation of determining whether the cold insulation is defective by the security monitoring timer is performed.

Next, it is judged whether or not the cooling cylinder valve 24 is ON (406), and by judgments (407) and (408),
When the sterilization / cooling sensor 32 is 10 ° C. or higher, the cooling cylinder valve 24 and the beater motor 12 are turned on (409).
(410). When the temperature is 8 ° C or lower, the cooling cylinder valve 2
4 and the beater motor 12 are turned off (411) (41
2). When the cooling cylinder valve 24 is ON, the compressor motor 18M is also ON. Then, it is judged whether the cooling hopper valve 26 is ON (413), and it is judged (414).
When the temperature of the hopper sensor 32 is 10 ° C. or higher by (415), the cooling hopper valve 26 is turned on (416).

When the temperature is 8 ° C. or lower, the cooling hopper valve 2
6 is turned off (417). Next, in the judgment (418), it is judged whether the flag is the self-cooling completion flag or not, and the judgment (41
9) When the cooling cylinder valve 24 is turned off and the self-sterilization end flag is set in (420), the self-substrate cooling flag is set.

When the self-cooling completion flag for the substrate is set, the process of transferring to the other substrate by communication (421) is performed. Then, it is judged whether or not the cold insulation completion flag is sent from the other substrate 70B by communication (422), and the other substrate 70
When it is sent from B (YES), the post-sterilization flag is set (423) and all the LEDs 0 to 4 are turned on (42
4). Therefore, the flowchart starting from the judgment (418) is the same as the communication method related to the sterilization end judgment described above, and is an operation flowchart related to the cold insulation end judgment and mutual communication.

The control operation of the reverse valve 36 is performed according to the flowchart of FIG. When the sterilization / cooling sensor 38 (cylinder sensor) detects the temperature of the mix and the mix does not reach the prescribed sterilization temperature (for example, 72 ° C.) and the temperature is lower than that, the reverse valve 3
The detection temperature of the mix for turning OFF 6 is a predetermined operating temperature of 60 ° C. First, the control operation under normal conditions (normal temperature area) where the outside temperature is not low and the water temperature is not low will be described.

It is confirmed at judgment 901 that it is a heating cycle. If confirmed (YES in decision 901), there is no first compressor motor 18M overcurrent flag, and therefore
The judgment 902 is NO, and the judgment 903 is also NO because the temperature of the mix is 60 ° C. or lower. Therefore, the flowchart shifts to the determination of the presence / absence of the overcurrent flag of the compressor motor 18M in the determination 904, and the determination (905) (90)
In 6), when the compressor motor 18M current is 5.3A or more, the overcurrent flag is set (907), and the reverse valve 3
6 is turned off (908).

As a result, the input of the high temperature gas generated in the final stage of heat sterilization to the compressor 18 adversely affected the compressor 18. However, the refrigerant circulation amount is gradually reduced by closing the reverse valve 36. The compressor 18 can be protected. On the other hand, if the frozen dessert manufacturing equipment is used in cold regions,
When operating under conditions of low outside temperature and low water temperature, the control is as follows.

It is confirmed by the judgment (901) that it is a heating cycle. Heating is done and compressor motor 18M
The overcurrent does not exceed 5.3A, and the heating temperature of the mix is below the specified temperature. Therefore, in the judgment (903), the heating temperature of the mix is continuously monitored by the mix temperature detecting sensor, and when the temperature of the mix becomes 60 ° C. or higher (YES in 903), the compressor motor 18M overcurrent flag is set. Do (90
7) The reverse valve 36 is turned off (909). When the reverse valve 36 is turned off, the temperature of the gas discharged from the compressor 18 rises and the cooling cylinder 8 is heated and heated so as to reach the specified mix sterilization temperature.

The compressor motor 18M overcurrent flag is set (YES in 902), and unless the mix temperature becomes 58 ° C. or lower by the subsequent judgment 911, the reverse valve 36 is kept off and the heat sterilization is continued.
When the temperature of the mix is detected to be 58 ° C. or lower (YES in 911), the opening / closing control of the reverse valve 36 based on the electric current of the compressor motor 18M is performed. That is, the judgment (90
4), Judgment (905) and Judgment (906), the reverse valve 36 is closed when the compressor motor current is 5.3 A or more, and the reverse valve 36 is opened when the compressor motor current is 3.5 A or less, the same control as the operation at room temperature. Is done.

In this way, the heat sterilization of the apparatus and the mix can be smoothly and smoothly performed without prolonging the temperature raising time even at low outside air temperature and low water temperature. Also, after the mix temperature reaches a predetermined temperature set somewhat lower than the specified sterilization temperature, by circulating and supplying a gas having an appropriately high discharge temperature, by performing heating with little temperature fluctuation,
Frequent load fluctuations can be prevented from being applied to the compressor 18, and the compressor 18 can be protected.

That is, according to claim 1 of the present invention, the mix is stored and kept cold in the frozen dessert producing apparatus 1 for producing frozen desserts having different temperature zones such as shake (about -3 ° C) and soft cream (about -8 ° C). A hopper 2 and a cooling cylinder 8 for cooling the mix appropriately supplied from the hopper 2,
A cooling device for cooling the cooling cylinder 8; a cylinder sensor 31 for indirectly or directly detecting the temperature of the mix in the cooling cylinder 8; and a beater 10 for stirring the mix in the cooling cylinder 8. At the initial operation of shaking (frozen dessert in the higher temperature zone), when the cooling cylinder 8 is cooled and the beater 10 is operated, and the cylinder sensor 31 detects a predetermined temperature slightly higher than the lower limit set temperature. The cooling is stopped for a predetermined time and only the operation of the beater 10 is performed, and after the predetermined time elapses, the cooling is performed again to the lower limit set temperature. Therefore, the overrun for the shake raw material is made appropriate and the temperature of the cooling cylinder 8 is exceeded. Prevent shoots.

Further, according to claim 2 of the present invention, in the frozen dessert making apparatus 1 according to claim 1, when the device is restarted within a predetermined time after the device is stopped, the cylinder sensor 31 is below a predetermined temperature slightly higher than the lower limit set temperature. If the temperature is detected, the cooling of the cooling cylinder 8 and the operation of the beater 10 are continued up to the lower limit set temperature. Therefore, when the user mistakenly stops the device and immediately restarts it, it is possible to prevent useless cooling stop. You can

Further, in claim 3 of the present invention, the hopper 2 for storing and cooling the mix, the cooling cylinder 8 for appropriately cooling the mix supplied from the hopper 2, the cooling cylinder 8 and the hopper 2 are heat-sterilized. A frozen dessert manufacturing apparatus including a heating device for controlling the temperature, a cylinder sensor (sterilization sensor) 38 that indirectly or directly detects the temperature of the mix in the cooling cylinder 8, and a hopper sensor 32 provided in the hopper 2. In the apparatus, when the cooling cylinder 8 and the hopper 2 are heated and sterilized, the cylinder sensor 38
When the predetermined temperature lower than the sterilization set temperature is detected, the heating of the cooling cylinder 8 is stopped, and when the hopper sensor 32 detects the sterilization set temperature, the heating of the cooling cylinder 8 is restarted. Appropriate heat sterilization can be performed on any mix of 2 and the cooling cylinder 8.

[0104]

According to the invention of claim 1, in a frozen dessert manufacturing apparatus for manufacturing frozen desserts such as shakes and soft ice creams having different temperature zones, a hopper for storing and cooling the mix,
A cooling cylinder for appropriately cooling the mix supplied from the hopper, a refrigerating device for cooling the cooling cylinder, a sensor for indirectly or directly detecting the temperature of the mix in the cooling cylinder, and a cooling cylinder for the cooling cylinder. A stirring device for stirring the mix is provided, and during the initial operation of shaking (frozen dessert in a high temperature zone), the cooling cylinder is cooled and the stirring device is operated, and the sensor is slightly higher than the lower limit set temperature. When the temperature is detected,
Cooling is stopped for a predetermined time and only the operation of the stirring device is performed, and after the predetermined time has elapsed, the cooling is performed again to the lower limit set temperature, so that the overrun for the shake raw material is made proper and the overshoot of the cooling cylinder temperature is also achieved. To prevent. As a result, high quality frozen desserts can be provided.

According to a second aspect of the present invention, in the frozen dessert manufacturing apparatus according to the first aspect, when the device is restarted within a predetermined time after the device is stopped, the sensor detects a temperature lower than a predetermined temperature slightly higher than the lower limit set temperature. If so, the cooling cylinder cooling and stirring device operations are continued up to the lower limit set temperature, so that it is possible to prevent useless cooling stop when the user accidentally stops the device and immediately restarts it. Therefore,
It is possible to provide a high-quality frozen dessert and an frozen dessert manufacturing apparatus with improved usability.

According to a third aspect of the present invention, a hopper for storing and cooling the mix, a cooling cylinder for appropriately cooling the mix supplied from the hopper, and a heating for heat sterilizing the cooling cylinder and the hopper. Apparatus, a cylinder sensor that indirectly or directly detects the temperature of the mix in the cooling cylinder, and a frozen dessert manufacturing apparatus including a hopper sensor provided in the hopper, during heat sterilization of the cooling cylinder and the hopper, When the detected temperature of the cylinder sensor detects a predetermined temperature lower than the sterilization set temperature, the heating of the cooling cylinder is stopped, and when the hopper sensor detects the sterilization set temperature, to restart the heating of the cooling cylinder, the hopper and Any mix of cooling cylinders can provide proper heat sterilization. As a result, high quality frozen desserts can be provided.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a frozen dessert manufacturing apparatus showing the present embodiment.

FIG. 2 is a front view of the frozen dessert manufacturing apparatus.

FIG. 3 is a refrigerant piping diagram of the present embodiment.

FIG. 4 is a front view of a frozen dessert manufacturing apparatus in which a display operation panel is arranged.

FIG. 5 is a front view of a frozen dessert manufacturing apparatus in which a display operation panel is arranged.

6 is a control circuit diagram showing one system unit of the control unit of the frozen dessert manufacturing apparatus of FIG. 1. FIG.

7 is an operation circuit diagram of each drive component which is a drive control target controlled by the control unit shown in FIG. 6;

FIG. 8 is a main flowchart showing the overall processing by the control unit.

FIG. 9 is a main flowchart showing the overall processing by the control unit.

FIG. 10 is a flowchart showing a process relating to a cooling operation.

FIG. 11 is a flowchart showing a process relating to a cooling operation.

FIG. 12 is a flowchart showing a process related to a cooling operation after cooling is stopped.

FIG. 13 is a flowchart showing a process relating to a sterilization operation.

FIG. 14 is a flowchart showing a process relating to a sterilization operation.

FIG. 15 is a flowchart showing a process relating to a cold insulation operation.

FIG. 16 is a flowchart showing a process relating to a cold insulation operation.

FIG. 17 is a time chart related to sterilization / cooling operation.

FIG. 18 is a flowchart showing a process relating to a control operation of a reverse valve.

[Explanation of symbols]

 1 Device main body (frozen dessert manufacturing device) 2 Hopper 8 Cooling cylinder 10 Beater 31 Cylinder sensor 32 Hopper sensor 38 Sterilization / cold sensor

Claims (3)

[Claims] 1. A frozen dessert producing apparatus for producing frozen desserts having different temperature zones, a hopper for storing and cooling the mix, a cooling cylinder for appropriately cooling the mix supplied from the hopper, and a freezing device for cooling the cooling cylinder. When cooling a frozen dessert that is manufactured in a high temperature zone, including a sensor that indirectly or directly detects the temperature of the mix in the cooling cylinder and a stirring device that stirs the mix in the cooling cylinder. During the initial operation of, the cooling cylinder is cooled, the stirring device is operated, and when the sensor detects a predetermined temperature slightly higher than the lower limit set temperature, the cooling is stopped for a predetermined time and only the stirring device operates. ,
A frozen dessert manufacturing apparatus characterized by cooling again to a lower limit set temperature after a lapse of a predetermined time. 2. If the sensor detects a temperature lower than a predetermined temperature slightly higher than the lower limit set temperature when the device is restarted within a predetermined time after the device is stopped, the operation of the cooling and agitating device of the cooling cylinder reaches the lower limit set temperature. The frozen dessert manufacturing apparatus according to claim 1, which is continued. 3. A hopper for storing and cooling the mix, a cooling cylinder for appropriately cooling the mix supplied from the hopper, a heating device for heat-sterilizing the cooling cylinder and the hopper, and a mix for mixing in the cylinder. In a frozen dessert manufacturing apparatus including a cylinder sensor that indirectly or directly detects a temperature and a hopper sensor provided in the hopper, during heat sterilization of the cooling cylinder and the hopper, the temperature detected by the cylinder sensor is lower than the sterilization set temperature. A frozen dessert manufacturing apparatus, which stops heating of the cooling cylinder when a low predetermined temperature is detected, and restarts heating of the cooling cylinder when the hopper sensor detects a sterilization set temperature.