JP3717652B2 - Frozen dessert production equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for producing frozen confectionery such as soft ice cream, and more particularly to an apparatus for producing frozen confectionery relating to the operation time of a hopper stirrer.
[0002]
[Prior art]
As this type of apparatus, as disclosed in Japanese Utility Model Publication No. 63-20304, a refrigeration apparatus comprising a compressor, a condenser, a throttle, and a cooler equipped in a cylinder and a mix tank (hereinafter referred to as a hopper) is provided. The refrigeration cycle of the equipment is reversible with a four-way valve, and when producing frozen desserts, liquefied refrigerant is flowed through the cooler to cool the cylinder and hopper, while high temperature refrigerant gas (hot gas) from the compressor is cooled when mixing and sterilizing and washing the equipment. There is a type that heats a cylinder and a hopper by guiding the heat to a vessel and dissipating the heat and causing the cooler to act as a radiator.
[0003]
When there is a predetermined amount or more of the mix in the hopper, the mix must be sufficiently stirred in order to bring the entire mix in the hopper to a uniform temperature during cooling of the hopper and during heat sterilization. For this reason, in the conventional frozen dessert manufacturing apparatus, the temperature of the whole mix in a hopper was made uniform by operating continuously the stirrer provided in the hopper.
[0004]
[Problems to be solved by the invention]
However, when such a stirrer is continuously performed, a vortex is generated in the hopper, and the vortex may reach the bottom surface of the hopper. Generation | occurrence | production of such a vortex included air in the mix, and the bubble was produced in the mix surface when the air concerned was stirred with the stirrer. Such bubbles generated on the surface of the mix make the detection position of the mix break detection sensor unclear and cause erroneous detection.
[0005]
Moreover, at the time of heat sterilization, the presence of bubbles in the mix makes it difficult for the surface temperature of the bubbles to be heated, resulting in a problem that normal heat sterilization cannot be performed.
[0006]
The present invention has been made to solve the technical problem, and provides a frozen dessert manufacturing apparatus that prevents excessive stirring of the mix by operating a stirrer in a hopper as much as possible.
[0007]
[Means for Solving the Problems]
In the frozen dessert manufacturing apparatus of the present invention, a hopper for storing the mix, a cooling cylinder for cooling and stirring the mix appropriately supplied from the hopper, a hopper cooler and a hopper stirrer provided in the hopper, and the amount of the mix in the hopper Mix detection device to detect, cylinder cooler provided in the cooling cylinder, cooling circuit that cools the hopper and cooling cylinder by each cooler during the manufacture of frozen dessert, and heating that heats the hopper and cooling cylinder by each cooler during heat sterilization A reversible cycle type refrigeration apparatus constituting a circuit, and a control device for controlling the hopper stirrer and the refrigeration apparatus, When the mix detection device does not detect that the mix in the hopper is greater than or equal to the predetermined amount, the control device operates the hopper stirrer in intermittent operation with a stop time longer than the operation time, The mix detection device confirms that the mix in the hopper If detected, The control device operates the hopper stirrer in intermittent operation in which the stop time is shorter than the operation time.
[0008]
According to the frozen confectionery manufacturing apparatus of the present invention, When the mix does not exist in the hopper more than a predetermined amount, the hopper stirrer performs intermittent operation with the stop time longer than the operation time, Mix in the hopper If there is more than a certain amount, Because the hopper stirrer performs intermittent operation with a shorter stop time than the operation time, While thoroughly stirring the mix present in the hopper over a predetermined amount, It is possible to prevent the vortex generated by stirring from reaching the bottom surface of the hopper as much as possible.
[0009]
This While thoroughly stirring the mix in the hopper to achieve a uniform temperature throughout, Since the foaming more than necessary for the mix can be reduced, a high-quality frozen dessert can be provided.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic side view of an internal configuration of a soft ice cream manufacturing apparatus according to an embodiment of the present invention, FIG. 2 is a front view of the soft ice cream manufacturing apparatus, and FIG. 3 is a refrigerant circuit diagram. Two types of soft creams, for example, vanilla soft cream and chocolate soft cream, are manufactured, and therefore, two sets of the apparatus configuration shown in FIG. 1 are provided. And as a soft cream which can be extracted, three kinds of vanilla soft cream, chocolate soft cream, and mixed soft cream obtained by mixing these can be sold.
[0011]
First, in FIG. 1, 1 is an apparatus main body, 2 is a raw material for frozen confectionery (soft cream), a so-called mix hopper, has a hopper cover 3 that is removed when the mix is replenished, and is wound around the hopper 2 The mix is kept cold in the hopper cooling coil 4. Further, the hopper stirrer 5 provided in the inner bottom portion is driven to rotate even when a predetermined amount or more of the mix is put in the hopper 2 and the hopper cooling coil 4 is heated and sterilized by the refrigerant gas that flows in the opposite direction to the cooling state, that is, hot gas. Is done. The detailed operation of the hopper stirrer 5 will be described later. 7 is a mix detection device that detects whether or not the hopper 2 has a predetermined amount or more of the mix. The mix detection device 7 includes a pair of conductive electrodes. The hot gas circulation is stopped and the hopper stirrer is not rotated so as not to perform the heat sterilization process described later.
[0012]
Reference numeral 8 denotes a cooling cylinder for producing a frozen dessert by rotating and stirring the mix appropriately supplied from the hopper 2 by the mix feeder 9 by the beater 10, and an evaporator 11 is disposed around the cooling cylinder. The beater 10 is rotated via a beater motor 12, a drive transmission belt, a speed reducer 13, and a rotating shaft. The manufactured frozen dessert is removed by operating the takeout lever 15 disposed on the freezer door 14 and the plunger 16 moves up and down to open the extraction path 17. Here, in this apparatus, as shown in FIG. 2, three extraction levers are provided.
[0013]
That is, the left takeout lever 15A is for vanilla, the right takeout lever 15B is for chocolate, and the center takeout lever 15C is for mixing vanilla and chocolate. For this purpose, another cooling cylinder 8B is provided as shown in FIG. 3, the cooling cylinder 8A is for producing vanilla soft cream, the cooling cylinder 8B is for producing chocolate soft cream, The cooling cylinder 8A communicates with the extraction path 17A between them, and the take-out lever 15B and the cooling cylinder 8B communicate with each other through the extraction path 17B to extract vanilla and chocolate as a one-to-one correspondence. Mixing soft ice cream can be extracted by connecting the extraction lever 15C to both cooling cylinders 8A and 8B via extraction paths 17C and 17C. At the time of taking out the frozen dessert, each beater 10 (the other not shown) rotates to fulfill the function of delivering the frozen dessert.
[0014]
Next, a refrigeration apparatus for cooling the hopper 2 and the cooling cylinder 8 will be described. 18 is a compressor, 19 is a four-way valve that reversely switches the flow of refrigerant discharged from the compressor 18 during the refrigeration cycle (solid line state) and during the heating cycle (dotted line state), and 20 is a water-cooled condenser that provides a check valve 21. The high-temperature and high-pressure refrigerant gas flowing in through the refrigerant is condensed and liquefied to obtain a liquefied refrigerant. When the liquefied refrigerant comes out of the dryer 23 via the check valve 22, it is divided into two hands, one of which flows into the evaporator 11 via the cooling cylinder valve 24 and the cooling cylinder capillary tube 25, where it evaporates and evaporates. Cool down. Then, the other flows into the hopper cooling coil 4 through the cooling hopper valve 26 and the preceding hopper capillary tube 27, and similarly evaporates and cools the hopper 2, and then exits through the subsequent capillary tube 28. Go.
[0015]
Then, the refrigerant gas after cooling the cooling cylinder 8 and the hopper 2 joins the accumulator 30 and then forms a refrigeration cycle that returns to the compressor 18 through the four-way valve 19 to perform a cooling operation in which the refrigerant flows in the solid line direction. It is. By the way, in this cooling operation, the cooling cylinder 8 and the hopper 2 are kept cooled 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 high-quality frozen dessert. There is a need to. Therefore, a cylinder sensor 31 for detecting the temperature of the cooling cylinder 8 is provided. The sensor 31 turns on (opens) the cooling cylinder valve 24 at the preset upper limit set temperature, turns on the compressor 18 to perform cooling, and lowers the lower limit. The cooling hopper valve 26 is opened and closed and the compressor 18 is turned on and off at the set temperature. However, the cooling 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.
[0016]
After sales are made under the above-described cooling operation, the mix is sterilized by the heating method when the store is closed. In this case, the refrigeration apparatus is switched from the refrigeration cycle to the heating cycle operation. That is, the four-way valve 19 is operated to cause the refrigerant to flow as indicated by a dotted arrow. Then, the high-temperature and high-pressure refrigerant gas from the compressor 18, that is, the hot gas, is divided into two hands through the four-way valve 19 and the accumulator 30, one directly to the evaporator 11 and the other to the hopper cooling coil 4 via the check valve 33. In each case, a heat dissipation action is generated, and the cooling cylinder 8 and the hopper 2 are heated for a predetermined time at a predetermined sterilization temperature. The liquefied refrigerant after heat dissipation joins via the hot gas cylinder valve 34 and the hot gas hopper valve 35, respectively, and is separated into gas and liquid by the water-cooled condenser 20, and the refrigerant gas is provided in parallel with a reverse solenoid valve 36 and a reverse capillary tube 37. Through the four-way valve 19 and back to the compressor 18 to form a heating cycle. A sterilization / cooling sensor 38 detects the heating temperature of the cooling cylinder 8, and the hot gas cylinder valve 34 is set at a predetermined upper and lower set temperature values so as to maintain a predetermined sterilization temperature for the mix. And the compressor 18 is ON / OFF controlled.
[0017]
Further, the sterilization / cooling sensor 38 measures the heating temperature of the cooling cylinder 8. Since it can be determined that the measured temperature is substantially close to the heating temperature of the mix, the sterilization / cooling sensor 38 is used as the mix temperature detection sensor. Also used as. In the following description, it will be described as a mix temperature detection sensor where necessary. It is also possible to perform opening / closing control of the reverse valve 36 using mix temperature information detected by the sterilization / cooling sensor 38.
[0018]
The hopper 2 is heated by the hopper sensor 32, and the hot gas hopper valve 35 and the compressor presser 18 are turned on and off at the same set temperature value set in the cooling cylinder 8. Further, the sterilization / cooling sensor 38 shifts to cooling after heat sterilization, and the compressor 18 is turned on and off so as to maintain a certain low temperature state until the point of sale the next day, that is, at a cold temperature (about + 8 ° C. to + 10 ° C.). Control and cooling cylinder valve 24 and cooling hopper valve 26 are ON / OFF controlled.
[0019]
The cooling cylinder 8 is also provided with a supercooling sensor 40 (see FIG. 6), which detects an abnormally low temperature, the function of which will be described later. 41 is a water-saving valve, and at the end of the heating cycle, due to a reduction in heating load (cooling cylinder, hopper), the refrigerant gas returns in a high temperature state and flows into the compressor 18 to prevent overload operation. A gas pressure sensor 42 for detecting the refrigerant gas pressure in the water-cooled compressor 20 is provided. When the predetermined gas pressure value is exceeded, the water-saving valve 41 is opened by the gas pressure sensor 42, and water flows through the water supply path 43 as indicated by a one-dot chain line arrow. The high-temperature refrigerant gas releases heat to adjust the compressor suction pressure.
[0020]
Similarly, in order to suppress the high load operation of the compressor 18, as will be described later, a means for controlling the opening and closing of the reverse valve 38 by means of the compressor motor current detection means or at the mixed detection temperature of the sterilization / cooling sensor 38 is provided. Yes. 44 is an electrical box, and 45 is a front drain receptacle. Reference numeral 46 denotes a water tap, which is supplied with water during mix cleaning.
[0021]
FIG. 3 is a refrigerant circuit diagram according to the present apparatus having two cooling cylinders 8A and 8B. The main components are the same as those of A type (vanilla soft cream) and B type (chocolate soft cream). A and B are appended to the same numbers shown in FIG.
[0022]
By the way, as shown in FIG. 2, an operation panel 50 is disposed at the upper position of the freezer door 14 in front of the apparatus main body 1. The operation panel 50 includes a sterilization switch 51, a sterilization monitor display, as shown in FIG. Two sets of switches and indicators having the same function are arranged on the left and right with 52 as the center. That is, each group is an operation unit corresponding to the A type frozen dessert and the B type frozen dessert.
[0023]
Here, each switch will be described. When the cooling operation switch 53 is pressed, the cooling temperature of the cooling cylinder and the hopper is controlled to be 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 far away from the customer's feet and performs cooling control at a set value temperature obtained by slightly upshifting the cooling temperature to achieve an economical operation. 55 is a defrost switch, which is pressed to soften and remove the mix for collecting the mix from the cooling cylinder or to regenerate the hardened soft cream because it is not sold for a long time. Raise the cylinder to a certain temperature.
[0024]
In this case, the temperature rises at the time of recovery higher than in the case of softening regeneration. 56 is a washing switch, and when it is pressed, the beater 10 is driven to rotate for a predetermined time limit. When the mix is collected after defrosting or after collecting the mix, the hopper and cooling cylinder are filled with a water tap. It is operated when washing with fresh water. When the mix is collected, if the defrost switch 55 is pressed while the cleaning switch 56 is pressed, the defrost is entered, the mix in the cooling cylinder 8 is softened, and then the beater is rotated by pressing the cleaning switch 55 again. Discharged.
[0025]
On the other hand, when the defrost switch 55 is pressed while the cooling operation switch 53 is pressed at the time of softening and regenerating the mix, the mix softening is automatically changed to recooling. 51 is a sterilization switch, which is pushed at the time of one-day business repair, and enters into the heat sterilization process of the cooling cylinder and hopper by hot gas.
[0026]
In the heat sterilization of the mix, there is a provision that the heating temperature of + 68 ° C. is 30 minutes or more, and in order to satisfy this, in this embodiment, the temperature is over 70 ° C. for about 30 minutes. There are provided sterilization monitor lamps L1, L1, L2, L3, L4 (hereinafter abbreviated as sterilization 0 to 4 LEDs) that are sequentially blinked in four stages from the 0 stage to the completion of sterilization. It has become. A stop switch 57 stops all control operations (cooling, defrosting, cleaning, sterilization).
[0027]
58 is a mix replenishment lamp, which lights up when the mix is not touching 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 conditions occur in addition to the above-mentioned mix breakage (in this case, blinking and indicating that sterilization preparation is defective). The same applies to the right switches and display lamps.
[0028]
The contents reported by the abnormality alarm lamp 59 include water stoppage, beater motor overload relay (OLR) operation, supercooling, softening alarm, sterilization preparation failure, cold insulation failure, power failure, sterilization failure, sensor failure, etc. When the front lower plate 1a of the apparatus main body 1 is removed, the codes are respectively displayed on the seven-segment displays 61 provided corresponding to the respective apparatuses on the separate operation panel 60 shown in FIG. It is displayed. The code display content is sent and displayed by the changeover switch 62. 63 is a reset button of the beater motor 12, and 64 is a shake / soft changeover switch. 75 and 76 are volumes for temperature adjustment corresponding to shake and software.
[0029]
FIG. 6 shows a configuration diagram of a system control device mounted on the soft ice cream manufacturing apparatus. This system control apparatus is provided on cooling cylinders 8A and 8B arranged on the left and right as viewed from the front of the soft ice cream manufacturing apparatus. Correspondingly, there are two in total, but in the figure, only one of the control devices of the right system is shown, and the others are not shown. The one control device is configured on the control board 70A, and the other control device is configured on the other control board 70B.
[0030]
The system controller will be described in detail. From the cylinder sensor 31, the hopper sensor 32, the supercooling sensor 40, the signal from the sterilization / cooling sensor 38, the current sensor 71 for detecting the compressor motor current, and the current sensor 72 for detecting the beater motor current. Is input to the A / D converter 74 via the amplifying circuit 73... And the cooling temperature of the cooling cylinder is set in the A / D converter 74 so as to be suitable for the production of soft ice cream. An output signal from the soft adjustment volume 75 to be adjusted and an output signal from the shake adjustment volume 76 that is set and adjusted to a cooling temperature suitable for the production of the ice cream shake are input and A / D converted.
[0031]
As for the supercooling sensor 40, if the mix is not replenished near the end of business, and the sale continues with only the mix in the freezing cylinder, the mix in the cooling cylinder gradually decreases, The cooling load (mix) is reduced and a supercooled state occurs. Then, since the evaporator is lowered to a predetermined temperature, the supercooling sensor 40 performs a detection operation to control defrosting.
[0032]
Then, after defrosting, when no mix is added, it is supercooled again, and when the number of times of supercooling is 2, there is a safety protection function that stops all operations. The current sensor 71 associated with the compressor follows the suction pressure of the compressor. That is, at the end of the heating cycle, the heat exchange in the cooling cylinder decreases and returns to high temperature and high pressure gas, resulting in an overload condition of the compressor. This increase in current value is detected, the reverse valve 36 is closed, the circulating refrigerant flow rate is adjusted, and the load is reduced.
[0033]
Further, the reverse valve 36 is opened when the mix temperature detected by the sterilization / cooling sensor 38 detects a predetermined temperature value (60 ° C.). The current sensor 72 relating to the beater motor detects the beater motor current that changes depending on the hardness of the mix due to cooling. When it becomes too hard to cool, only cooling is stopped and stirring is continued, and the frozen dessert reaches the set temperature. Then, it is related to the function of reducing the load when the beater motor is restarted by operating to stop stirring. A CPU (central processing unit) 77 executes processing corresponding to the converted digital signal from the A-D converter 74.
[0034]
On the other hand, the CPU 77 is connected to the mix detection device (electrode) 7 through the buffer 78, and the mix detection device (electrode) 7 is supplied with a mix break signal, a water stop signal, a compressor overload signal, a beater motor overload signal, a class A frozen dessert extraction signal, Input is performed by a mix break detection circuit 79, a water shutoff switch 80, a compressor overload relay (OLR) switch 81, a beater motor overload relay (OLR) switch 82, an extraction SW 183, and an extraction SW 284. Further, the power frequency signal is input to the buffer 78 via the power frequency detection circuit 85 and key inputs from the operation switches of the operation panel 50 are input to the CPU 77.
[0035]
Therefore, the CPU 77 executes processing according to the digital signal from the A / D converter 74 and the signal from the buffer 78, and outputs a device drive stop command, a display signal, and the like. That is, with respect to the device start / stop command, a control command is output from the CPU 77 via the buffer 86, and the relays RY1, RY2, RY3, RY4, RY5, RY6, RY7, RY8, RY9 are operated, and the operation contacts RY1, RY2, RY3, RY4, RY5, RY6, RY7, RY8, RY9, as shown in FIG. 7, compressor motor CM18M, beater motor BM12, mix stirring motor KM6, cooling cylinder valve F.M. S24, cooling hopper valve H26, hot gas cylinder valve S34, hot gas hopper valve H35, four-way valve QV19, and reverse valve RV36 are driven and controlled.
[0036]
Then, the sterilization progress status, the mix failure, the device abnormality alarm, etc. are lit or blinked on the display LED 87, and the abnormality content is displayed on the 7-segment display 61. Further, information processed and executed by the CPU 77 is communicated with the other substrate 70B, that is, the system control device for the B-type frozen dessert, through the transmission line 88.
[0037]
As mentioned above, although the soft ice cream manufacturing apparatus based on a present Example has the apparatus structure and control circuit structure shown in FIGS. 1-7, the actual condition of the operating condition is explained in full detail below.
(I) Cooling operation or energy-saving cooling operation
(I) -1 Normal cooling operation
By the pressing operation of the cooling operation switch 53, the normal refrigeration cycle, that is, the cooling cylinder 8 is controlled by the cylinder sensor 31 within the temperature range of the lower limit temperature (set value) and the upper limit temperature (set value + 1.5 ° C.), and the hopper 2 is moved into the hopper. The compressor 18, the cooling cylinder valve 24, the cooling hopper valve 26, and the beater motor 12 are controlled to be turned on and off so that the sensor 32 is cooled in a temperature range of + 8 ° C. to + 10 ° C. As a result, soft ice cream is manufactured in the cooling cylinder 8 and extracted every time it is sold.
[0038]
(I) -2 Cooling control correction operation when cooling is insufficient
In this cooling operation (sales state), the lower limit setpoint temperature is too low and cooling continues, and if the preset limit time (30 minutes) has not passed, the setpoint temperature is slightly shifted up. Then, cooling operation control is performed with this shift temperature set value as a new set temperature, and when it is not satisfied further, the set temperature is slightly shifted up and automatically shifted in steps to a predetermined limit set temperature (0 ° C.) The quality of soft ice cream is prevented from being deteriorated due to overcooling, and the load and operation rate of the compressor 18 are reduced to protect it.
[0039]
(I) -3 Cooling operation by energy saving
When the user selects the energy-saving operation switch 54 during night hours and at other times of the day, the set temperature is shifted up from the normal refrigeration cycle, and the cooling operation control based on the set temperature value is performed. (Energy-saving cooling operation).
[0040]
(I) -4 Cooling operation at the initial stage of sales
After the heat sterilization at the end of the previous day, the set temperature is shifted down (set value -0.2 ° C) until the sale of a certain number (40 pieces) of soft ice cream at the beginning of the next day's sales, cooling control To do. As a result, the mix at the cold storage temperature after heat sterilization is cooled to a temperature lower than that of the fresh mix, and a good soft cream without stickiness can be taken out from the beginning of the sale.
[0041]
(II) Sterilization / cooling operation
(II) -1 Sterilization operation
When the sterilization switch 52 is pressed, the engine is started under conditions where there is no running out of the mix. The four-way valve 19 switches from the refrigeration cycle to the heating cycle, and hot gas is supplied to the cooling cylinder 8 and the hopper 2 to be sterilized by heating. The compressor 18 and the hot gas cylinder valve 34 are operated by the sterilization / cooling sensor 38 and the hopper sensor 32 so that the cooling cylinder 8 and the hopper 2 satisfy the total heating time of about 40 minutes in the heating temperature range of + 70 ° C. to + 72 ° C. The hot gas hopper valve 35 is ON / OFF controlled.
[0042]
The process of heat sterilization is indicated by sterilization 0 to 4 LEDs, 0 LED blinks at the start, 1 LED blinks when the temperature of the cooling cylinder 8 reaches + 72 ° C., and 0 LED switches from blinking to lighting. While the heating time of + 70 ° C. or more continues for 13 minutes, 1 LED continues to blink, and after 13 minutes, 1 LED switches to lighting and 2 LED blinks. 3 LEDs and 4 LEDs blinking every 13 minutes after the transition, and the specified heating state for about 40 minutes (actually 13 minutes × 3 = 39 minutes) was performed at the time of 4 LED blinking, and the sterilization operation was terminated and the cooling operation was started. Move. That is, the blinking of the 4 LEDs indicates that the cold insulation operation has been started.
[0043]
(II) -2 Cooling operation
In the cooling operation that continues from the sterilization operation, the cooling cylinder 8 and the hopper 2 are kept in the temperature range of + 8 ° C. to + 10 ° C. under the condition that the temperature is not higher than the predetermined temperature (+13 degrees) within a predetermined time (90 minutes). Furthermore, the sterilization / cooling sensor 38 and the hopper sensor 32 control the compressor motor 18M, the cooling cylinder valve 24, and the cooling hopper valve 26 to be turned on and off.
[0044]
(III) Cleaning operation
When the store is closed, the cleaning switch 56 is pushed to operate. The beater motor 12 is turned on for a predetermined time, and the take-out lever is opened to collect (discharge) the mix. Further, after collection, water is supplied to the hopper 2 and the cooling cylinder 8 by the water tap 46 and the beater 10 is stirred and washed.
[0045]
(IV) Defrost (mix softening action)
(IV) -1 Defrost during mix recovery
The cooling cylinder 8 is heated to a predetermined temperature (+ 5 ° C.) with hot gas so as to facilitate the collection of the mix during the washing operation, thereby softening the mix. It operates by pressing the defrost switch 55, and heating control is performed by ON / OFF control of the hot gas cylinder valve by the sterilization / cooling sensor 38.
[0046]
(IV) -2 Defrost during cooling (energy saving) operation
When the defrost switch 55 is pressed during the cooling operation, it operates when the cooling cylinder 8 is heated with hot gas to raise the mix to a predetermined temperature (+ 0 ° C.), and then the cooling operation is continued to mix again to the set temperature. Cool down. Similarly, in the heating control, the hot gas cylinder valve 34 is turned ON / OFF by the sterilization / cooling sensor 38.
[0047]
In addition to the above operations, there are required protective operations.
(V) Four-way valve protection operation
Cooling cycle ← → Cooling cylinder valve 24 and cooling hopper valve 26 for a predetermined time (30 seconds) immediately after the switching in order to prevent liquid sealing and chatter noise in the refrigerant line that occurs when switching the four-way valve 19 related to the switching of the heating cycle. H., et al. G cylinder valve 34, H.M. The G hopper valve 35 is opened.
[0048]
(VI) Beater motor overcurrent protection
When an overload condition occurs due to the frozen dessert that has become too hard due to overcooling, the current sensor 72 determines the load condition by detecting the current value of the beater motor, and the current value exceeds the set values 4 and 8A. At that time, 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 becomes less than the set value 4, 2A, re-cooling (compressor motor (18M) OFF) is performed and the cylinder sensor 31 reaches the set temperature or is set from the start of cooling. Continue until time passes. This avoids the disadvantage that the beater motor falls into an overload situation.
[0049]
(VII) Compressor operation protection during heat sterilization (reverse valve control)
As the heating load decreases in the latter stage of heating, the reverse valve 36 adjusts (reduces) the amount of gas sucked into the compressor to reduce the operating load of the compressor. Therefore, the compressor motor current is detected by the current sensor 71, the reverse valve 36 is turned off at a predetermined value 5, 3A or more, and the reverse valve 36 is turned on at a predetermined value 3, 5A or less.
[0050]
Further, the reverse valve 36 is controlled to be opened and closed by the mix temperature detected by the mix temperature detection sensor, so that the temperature rising operation in the cold region can be achieved without changing from the normal temperature region, the details of which will be described later. .
[0051]
And there is a stirring control of the mix performed according to the mix amount in the hopper 2 which is the gist of the present invention.
(VIII) Control of hopper stirrer
In the control operation of the hopper stirrer subsequent to the control of the reverse valve, the mix detection device 7 that detects the amount of the mix in the hopper 2 is ON (when the mix amount is greater than or equal to a predetermined amount). The stirring motor (not shown) of the hopper stirrer 5 provided in is controlled to repeat ON for 1.5 seconds and OFF for 0.2 seconds. Further, under the condition that the mix detection device 7 is OFF (when the mix amount does not exist over a predetermined amount), the stirring motor is controlled to repeat ON for 0.2 seconds and OFF for 2 seconds.
The above operations (I) to (VIII) are executed under the system control device of FIG. 6, and the flow of the overall processing operation is performed according to the main flowcharts of FIGS. 10 and 11 show a flowchart of the sterilization operation, FIG. 12 and FIG. 13 show a flowchart of the cold insulation operation, and FIG. 14 shows a time chart of devices related to both operations. Moreover, in FIG. 16, the flowchart of control of a hopper stirrer is shown.
[0052]
Details of the flowchart for cooling / energy-saving operation, flowchart for cleaning operation, flowchart for defrost operation for softening regeneration, and each flowchart related to protection during four-way valve operation and beater motor overcurrent protection are omitted. To do.
[0053]
First, a description will be given with reference to the main flowcharts of FIGS. It is determined whether or not the stop switch 57 has been pressed (101). If YES, all operation flags are set and all operations are stopped (102). If NO, it is determined whether or not the operation switch 53 or the energy saving switch 54 is pressed (103). If YES, the sterilization operation flag is viewed (104). If the sterilization operation flag is NO, the operation / energy saving operation flag is determined. Is set and other operation flags are reset (105).
[0054]
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 determination (103) is NO, it is determined whether or not the sterilization switch 51 is pressed (106). If YES, it is determined whether or not the mix is out (107). The operation flag is set and the other operation flags are reset (108).
[0055]
If YES, the sterilization preparation failure display is output (109) and the sterilization operation flag is not set. The display of the sterilization preparation failure blinks on the abnormality alarm display lamp 59, and a code can be displayed on the 7-segment display 61. If the determination (106) is NO, it is determined whether or not the cleaning switch 56 has been pressed (110). If YES, the sterilization operation flag is viewed (111). If the sterilization operation flag is NO, the cleaning operation flag is set. Set and reset other operation flags (112).
[0056]
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 viewed (114). If the sterilization operation flag is NO in reset, cooling / energy saving is performed. Look at the operation flag or the cleaning operation flag (115), and when either flag is set YES, the defrost operation flag is set (116).
[0057]
Thus, each operation flag is set by operating each switch. Each operation is executed by this set flag. That is, the cooling / energy saving operation flag is viewed (117). When the flag is set, the cooling / energy saving operation is performed (118), and when the flag is reset, the cooling / energy saving operation is stopped. The sterilization operation flag is looked at (119). When the flag is set, the sterilization operation is performed (120), and when the flag is reset, the sterilization operation is stopped.
[0058]
Next, the cleaning operation flag is viewed (123). When the flag is set, the cleaning operation is performed (124), and when the flag is reset, the cleaning operation is stopped. The defrost operation flag is checked (125). When the flag is set, the defrost operation is performed (126). When the flag is reset, the defrost operation is stopped. After each operation is performed, a four-way valve protection operation (127), a beater motor overcurrent protection operation (128), a reverse valve control operation (129), and a hopper agitator 5 control operation (130) are executed.
[0059]
The processing procedure of the sterilization operation is performed according to the flowcharts shown in FIGS. 10 and 11, and the operation timing of the related equipment at that time is as shown in FIG. During the sterilization operation, the beater motor 12 is continuously operated. The four-way valve 19 is also continuously operated. Accordingly, under the execution 301 of the beater motor ON and the four-way valve ON, it is determined by the sterilization start timer whether the elapsed time after the start of sterilization is 2 hours (302). Since the mix may change due to heating, by setting the limit time, a sterilization failure alarm is output after the elapse of 2 hours (303), and after the elapse of time, the sterilization operation flag is reset and the cooling operation is performed. A flag is set (304), and the process proceeds to a cold insulation operation. If the judgment (302) is NO, It is determined whether or not the G cylinder valve 34 is ON (305). If the sterilization / cooling sensor temperature is 70 ° C. or lower in the determinations (306) and (307), the H.C. The G cylinder valve is turned ON (309), and the compressor motor 18M is also turned ON. When the sterilization / cooling sensor temperature is 72 ° C. or higher, the following H.P. It is determined whether the G hopper valve 35 is ON.
[0060]
Further, when the hopper sensor temperature is 72 ° C. or higher in the judgments 311 and 312, Turn off the G hopper valve and The G cylinder valve is also turned off (313), and the valve is turned on at 314 ° C. or lower (314). And H. When the G hopper valve 35 is ON, the compressor motor 18M is also ON.
[0061]
Using a sterilization step counter, the sterilization process is divided into five divisions of 0 to 4, and the progress of each is represented by numbers. Therefore, at the start of heating, H. G cylinder valve 34 and H.264. The G hopper valve 35 is turned on and starts to rise in temperature. At first, since the sterilization step counter is not 4, the determination (315) is NO, and further, since it has not reached the step counter 1, the determination (316) is NO, and the determination (317) (318) is H.264. G cylinder valve 34, H.M. Unless both the G hopper valve 35 are turned off, that is, until the sterilization / cooling sensor 38 and the hopper sensor 32 reach 72 ° C., it is determined that the sterilization step counter is 0 (319), the sterilization 0 LED is blinked, and sterilization is performed. The 1-4 LEDs are turned off (320).
[0062]
In other words, when the temperature reaches 72 ° C., the sterilization step counter is incremented (321) and the sterilization step counter becomes 1. When the determination (316) is YES, it is determined whether or not the sterilization / cooling sensor and the hopper sensor are 70 ° C. or higher (322) (323). It is determined whether or not it has elapsed (324). If it has not elapsed, the sterilization timer is accumulated (325). It is determined that the sterilization step counter is still 1 (326), and the sterilization 0 LED is lit and the sterilization 1 LED is blinking. The sterilization 2-4 LED extinguishing 327 is continued.
[0063]
Here, the sterilization timer (13-minute integration timer) integrates the timer when the sterilization / cooling sensor and the hopper sensor are 70 ° C. or higher, and stops the timer integration when the temperature is lower than 70 ° C. If 13 minutes elapses in decision 324, the sterilization step counter is incremented to 2 (328), and the sterilization timer is cleared (329). If it is determined that the sterilization step counter is 2 (330), sterilization 0, 1 LED is turned on, sterilization 2 LED is blinked, sterilization 3, 4 LED is turned off (331).
[0064]
Thereafter, in the same manner, the determination (332) and the steps (333) and (334) are followed by step-up every 13 minutes, and the sterilization 3LED and the sterilization 4LED are turned on and off. Therefore, when the sterilization step counter reaches 4, the sterilization process is completed, which is indicated by sterilization 0 to 3 LEDs: lighting and sterilization 4 LED blinking. When the self-sterilization process is completed in the determination (315), a self-sterilization end flag is set and a process of transferring to another substrate 70B by communication is performed.
[0065]
On the other hand, the other cooling cylinder 8B and the hopper 2B are also heated and sterilized, and when the other sterilizing process is completed, the sterilization end flag is set from the other substrate 70B and sent by communication. Therefore, it is determined whether or not the sterilization end flag has been sent from the other substrate (336). When the sterilization process of the self-board and the sterilization process of the other substrate is completed, the sterilization operation flag is set. A process (304) for setting a cold insulation operation flag is performed. In this way, the sterilization operation is completed and the cold operation is performed.
[0066]
Here, the flow of processing (335), determination (336), and processing (304) produces the following advantages. That is, in the case of the two cooling cylinders 8A and 8B, the central takeout lever 15C has extraction paths 17C and 17C (see FIG. 3) communicating with the loose cylinders 8A and 8B. Therefore, when the operation and stop of the sterilization stroke of each cooling cylinder 8A, 8B are controlled independently, when one is under heat sterilization and the other is under cooling operation, the central plunger 15 is cooled on the cooling side. As a result, a portion that does not reach the sterilization temperature is generated on the heating side, which may cause sterilization failure. By confirming that both sterilization processes have been completed by communicating with each other's sterilization process status, the sterilization operation flag is reset only, that is, the sterilization operation is stopped together. And complete sterilization.
[0067]
The processing procedure of the cold insulation operation is performed according to the flowcharts of FIGS. It is judged whether the temperature is 13 ° C. or higher by the sterilization / cooling sensor or the hopper sensor (401) (402). Is determined (403), and when it has passed, a cold insulation failure display is output (404). After the sterilization process, the refrigeration cycle is switched and cooling (pull-down) is performed, but if there is no abnormality in the cooling operation, it is assumed that the temperature reaches 13 ° C. in about 90 minutes, and the presence or absence of the cold insulation is judged. Therefore, when the sterilization / cooling sensor and the hopper sensor become lower than 13 ° C. within 90 minutes, the security monitoring timer is cleared (405). In other words, the operation of determining a cold insulation failure by the security monitoring timer is performed.
[0068]
Next, it is determined whether or not the cooling cylinder valve is ON (406), and when the sterilization / cooling sensor is 10 ° C. or higher according to determinations (407) and (408), the cooling cylinder valve and beater motor are turned ON (409) (410). ). When the temperature is 8 ° C. or lower, the cooling cylinder valve and the beater motor are turned off (411) (412). When the cooling cylinder valve is ON, the compressor motor is also turned ON. That is, ON / OFF control of the cooling cylinder valve is performed. Subsequently, it is determined whether or not the cooling hopper valve is ON (413), and when the hopper sensor is 10 ° C. or higher according to determinations (414) and (415), the cooling hopper valve is turned ON (416).
[0069]
When it is 8 ° C. or less, it is turned OFF (417). When the cooling hopper valve is ON, the compressor motor is also turned ON. That is, ON / OFF control of the cooling hopper valve is performed. Next, it is determined in decision (418) whether or not it is a self-substrate cooling end flag, and in determinations (419) and (420), when the cooling cylinder valve is turned OFF and the self-sterilization end flag is set, the self-substrate is determined. Set the cold flag.
[0070]
When the self-board cooling end flag is set, a process (421) of transferring to the other board by communication is performed. Then, in the determination (422), it is checked whether or not the cold insulation end flag is transmitted from the other substrate 70B by communication. If the other substrate 70B is also transmitted, the post-sterilization flag is set (423) and all The LEDs 0 to 4 are turned on (424). Therefore, the flow starting from the determination 418 is the same as the communication method related to the sterilization end determination described above, and is an operation flow related to the cold insulation end determination and mutual communication.
[0071]
The control operation of the reverse valve 36 is performed according to the flowchart of FIG. The mix temperature detection sensor detects the temperature of the mix, and when the mix does not reach a specified sterilization temperature (for example, 72 ° C.) and changes at a lower temperature, the detection temperature of the mix that turns the reverse valve 36 OFF That is, the predetermined operating temperature is 60 ° C. First, a description will be given of the control operation under normal conditions (room temperature) where the outside air temperature is not low and the water temperature is not low.
[0072]
A judgment 901 confirms that the heating cycle is in effect. If confirmed (Y in decision 901), there is no initial compressor motor overcurrent flag, so decision 902 is N, and the temperature of the mix is 60 ° C. or less, so decision 903 is also N. Therefore, the flow shifts to the determination of the presence or absence of the compressor motor overcurrent flag in the determination 904, and when the compressor motor current is 5.3 A or more in the determination (905) (906), the overcurrent flag is set (processing 907), and the reverse valve 36 is turned OFF (process 908).
[0073]
As a result, the high-temperature gas generated in the final stage during heat sterilization has been adversely affected by the compressor, but the refrigerant circulation amount can be reduced stepwise by closing the reverse valve, thereby protecting the compressor. On the other hand, the control operation when the frozen dessert manufacturing apparatus is operated under conditions of low outside air temperature and low water temperature, such as in a cold district, is as follows.
[0074]
In decision 901, it is confirmed that it is a heating cycle. The situation where heating is performed and the compressor motor overcurrent does not exceed 5.3 A continues, and the heating temperature of the mix is below the specified temperature. Therefore, when the mix heating temperature is continuously monitored by the mix temperature detection sensor in decision 903 and the mix temperature reaches 60 ° C. or higher (Y in decision 903), the compressor motor overcurrent flag is set ( Processing 907), the reverse valve 36 is turned off (processing 909). When the reverse valve 36 is turned off, the temperature of the discharge gas from the compressor 18 is increased, and the cooling cylinder 8 is heated to reach the prescribed mix sterilization temperature.
[0075]
The compressor overcurrent flag is set (Y in decision 902), and then the reverse valve 36 is kept OFF unless the mix temperature becomes 58 degrees or less by decision 911, and the heat sterilization is continued. When it is detected that the temperature of the mix is 58 ° C. or less (Y in judgment 911), the control proceeds to opening / closing control of the reverse valve 36 based on the compressor motor current. That is, according to the judgment 904, judgment 905, and judgment 906, when the compressor motor current is 5.3A or more and the reverse valve 36 is closed and is 3.5A or less, the same control as the operation at room temperature is performed such that the reverse valve 36 is opened. .
[0076]
In this way, the apparatus and mix can be sterilized quickly and smoothly without prolonging the temperature raising time even at low outside air temperature and low water temperature. In addition, after the mix temperature reaches a predetermined temperature that is set somewhat lower than the specified sterilization temperature, a gas with a moderately high discharge temperature is circulated and heated so that there is little temperature fluctuation. Can prevent frequent fluctuations and protects the compressor.
[0077]
The control operation of the hopper stirrer 5 which is the gist of the present invention is performed according to the flowchart of FIG. It is determined whether the hopper is performing a cooling operation (501). If the hopper is performing a cooling operation (Yes in determination 501), the process proceeds to determination 503. Further, when the hopper is not in the cooling operation (No in the determination 501), it is determined whether the operation is a sterilization operation (502). If it is a sterilization operation (Yes in determination 502), the process proceeds to determination 503. If it is not a sterilization operation (No in determination 502), the agitation motor is turned off (514).
[0078]
In determination 503, it is determined whether or not the mix-out detection circuit 79 is “H”. Here, the mix break detection circuit 79 becomes “H” when the mix exists in the mix detection device 7 constituted by the electrodes shown in FIG. 6, and becomes “L” when there is no mix. If the mix-out detection circuit 79 is “H” (Yes in decision 503), the ON time of the intermittent timer is set to 1.5 seconds, and the OFF time of the intermittent timer is set to 0.2 seconds (504). Proceed to 506. Further, when the mix break detection circuit 79 is not “H” (when “L”, judgment 503 No), the intermittent timer ON time is set to 0.2 seconds and the intermittent timer OFF time is set to 2 seconds. (505), and the process proceeds to decision 506.
[0079]
Next, in determination 506, it is determined whether the stirring motor ON flag is 1. If the stirring motor ON flag is 1 (Yes in determination 506), it is determined whether the intermittent timer ON time has passed the time set in 504 or 505 (507). If the set time has not elapsed (No in decision 507), an intermittent timer operation is executed (508), and the flow proceeds to 509. If the set time has elapsed (Yes in determination 507), the stirring motor ON flag is reset (510), the intermittent timer is cleared (511), and the process proceeds to 509.
[0080]
At 509, the agitation motor is turned on, and the program returns to the main program as shown in FIG.
[0081]
On the other hand, when the ON flag of the agitation motor is not 1 in the determination 506 (No in the determination 506), the process proceeds to the determination 512, and whether or not the intermittent timer OFF time has passed the time set in the 504 or 505. To be judged. If the set time has not elapsed (No in determination 512), an intermittent timer operation is executed (513), and the process proceeds to 514. When the set time has elapsed (Yes in determination 512), the stirring motor ON flag is set (515), the intermittent timer is cleared (516), and the process proceeds to 514.
[0082]
At 514, the agitation motor is turned off, and the program returns to the main program as shown in FIG.
[0083]
That is, in this control operation of the hopper agitator 5, when a predetermined amount of the mix in the hopper 2 does not exist, the intermittent operation is ON for 0.2 seconds and OFF for 2 seconds, and the agitation in the hopper 2 is performed in a small amount. . On the other hand, when the mix in the hopper 2 is more than a predetermined amount, the intermittent operation of the stirring motor is 1.5 seconds ON and 0.2 seconds OFF, and the stirring in the hopper 2 is performed continuously. However, since a slight stop time is provided, the vortex of the mix in the hopper 2 can be prevented from reaching the inner bottom surface of the hopper 2.
[0084]
Thereby, when a predetermined amount or more of the mix is present in the hopper 2, the mix is prevented from being foamed more than necessary, so that a high-quality mix can be retained and a high-quality frozen dessert can be provided.
[0085]
As described above, in claim 1 of the present invention, the hopper for storing the mix, the cooling cylinder for cooling and stirring the mix appropriately supplied from the hopper, the hopper cooler and the hopper stirrer provided in the hopper, Mix detection device for detecting the amount of mix, cylinder cooler provided in the cooling cylinder, cooling circuit for cooling the hopper and cooling cylinder by the respective coolers during the manufacture of frozen desserts, and the respective coolers at the time of heat sterilization In a frozen dessert manufacturing apparatus comprising a reversible cycle type refrigeration apparatus that constitutes a hopper and a heating circuit that heats a cooling cylinder, and a control device that controls the hopper stirrer and the refrigeration apparatus, the mix detection device is configured so that the mix in the hopper When it is detected that the amount exceeds the predetermined amount, the control device turns on the hopper stirrer, Providing ice confection producing device to operate at intermittent operation with a shorter downtime than rolling time.
[0086]
As a result, when a predetermined amount or more of the mix exists in the hopper, the hopper stirrer that stirs the inside of the hopper performs intermittent operation in which the stop time is shorter than the operation time. Since it can prevent reaching to the bottom as much as possible, the foaming more than necessary of the mix can be reduced, and thus a high-quality frozen dessert can be provided.
[0087]
【The invention's effect】
As described above, according to the present invention, the hopper for storing the mix, the cooling cylinder for cooling and stirring the mix appropriately supplied from the hopper, the hopper cooler and the hopper stirrer provided in the hopper, Mix detection device for detecting the amount of mix, cylinder cooler provided in the cooling cylinder, cooling circuit for cooling the hopper and cooling cylinder by the respective coolers during the manufacture of frozen desserts, and the respective coolers at the time of heat sterilization In a frozen dessert manufacturing apparatus comprising: a reversible cycle type freezing device that constitutes a hopper and a heating circuit that heats a cooling cylinder; and a control device that controls the hopper stirrer and the freezing device. When the mix detection device does not detect that the mix in the hopper is greater than or equal to the predetermined amount, the control device operates the hopper stirrer in intermittent operation with a stop time longer than the operation time, The mix detection device confirms that the mix in the hopper If detected, The control device provides a frozen dessert manufacturing apparatus that operates the hopper stirrer in intermittent operation in which the stop time is shorter than the operation time.
[0088]
Therefore, When the mix does not exist in the hopper more than a predetermined amount, the hopper stirrer performs intermittent operation with the stop time longer than the operation time, Mix in the hopper If there is more than a certain amount, Because the hopper stirrer performs intermittent operation with a shorter stop time than the operation time, While thoroughly stirring the mix present in the hopper over a predetermined amount, It is possible to prevent the vortex generated by stirring from reaching the bottom surface of the hopper as much as possible.
[0089]
This While thoroughly stirring the mix in the hopper to achieve a uniform temperature throughout, Since the foaming more than necessary for the mix can be reduced, a high-quality frozen dessert can be provided.
[Brief description of the drawings]
FIG. 1 is a schematic side view of the internal configuration of a soft ice cream manufacturing apparatus according to the present invention.
[Figure 2] Front view of the frozen confectionery manufacturing equipment
FIG. 3 is an explanatory diagram of a heat medium piping path configuration during cooling and heat sterilization according to a soft ice cream manufacturing apparatus configured with two cooling cylinders and a hopper.
FIG. 4 is an explanatory diagram of a display operation panel arranged in front of the soft ice cream manufacturing apparatus
FIG. 5 is an explanatory view of another display operation panel arranged behind the front plate of the manufacturing apparatus.
FIG. 6 is a control circuit configuration diagram showing one system unit of the control unit of the soft ice cream manufacturing apparatus of FIG. 1;
FIG. 7 is an operation circuit diagram of each drive component to be controlled by the control unit shown in FIG. 6;
FIG. 8 is a flowchart preceding the main flowchart showing the overall processing operation by the control unit;
FIG. 9 is a follow chart in the latter part of the main flowchart showing the overall processing operation by the control unit.
FIG. 10 is a flowchart of the previous stage showing the processing operation related to the sterilization operation;
FIG. 11 is a subsequent flowchart showing a processing operation related to the sterilization operation.
FIG. 12 is a flowchart of the first stage showing the processing operation related to the cold insulation operation;
FIG. 13 is a subsequent flowchart showing a processing operation related to the cold insulation operation;
FIG. 14 Time chart related to sterilization / cooling operation
FIG. 15 is a flowchart showing a processing operation related to the control operation of the reverse valve.
FIG. 16 is a flowchart for explaining the processing operation related to the control operation of the agitator.
[Explanation of symbols]
1 Frozen dessert production equipment
2 Hopper
5 Hopper stirrer
7 Mix break detection device
79 Mix-out detection circuit

Claims (1)

A hopper for storing the mix, a cooling cylinder for cooling and stirring the mix appropriately supplied from the hopper, a hopper cooler and a hopper stirrer provided in the hopper, a mix detection device for detecting the mix amount in the hopper, A cylinder cooler provided in the cooling cylinder, a cooling circuit for cooling the hopper and the cooling cylinder by the respective coolers during the manufacture of frozen confectionery, and a heating circuit for heating the hopper and the cooling cylinder by the respective coolers at the time of heat sterilization In a frozen confectionery manufacturing apparatus comprising a reversible cycle type refrigeration apparatus and a control device for controlling the hopper stirrer and the refrigeration apparatus,
When the mix detection device has not detected that the mix in the hopper is a predetermined amount or more, the control device operates the hopper stirrer in intermittent operation with a stop time longer than the operation time, When the mix detection device detects that the mix in the hopper is greater than or equal to a predetermined amount , the control device operates the hopper stirrer in an intermittent operation with a stop time shorter than the operation time. Frozen confectionery production equipment.

Images