JPS6391044A - Ice cream freezer - Google Patents

Abstract

PURPOSE:To prepare ice cream preventing overcooling troubles, by detecting the temperature of ice cream at a prescribed time with a temperature detector attached to a cooler of a cylinder of an ice cream freezer and stopping the operation of a refrigerant compressor when necessary. CONSTITUTION:A liquid raw material 26 for soft cream, etc., is supplied through a precooler 8 and a carburetor tube 9 into a cylinder 1 to a prescribed level. A stirrer 2 is rotated with a stirring motor 11 while cooling the material with a refrigerator 3 and the operation of the stirring motor 11 is controlled e.g. by the use of a current detector 35, a computing element 36, a comparator 37 and an output controller 39, etc., of a controlling device 31 to keep the ice cream 27 such as soft cream to a prescribed hardness. When the freezer is not in the state of the delivery of ice cream, the temperature of the ice cream is measured with a thermistor 14 of a temperature detector attached to the refrigerator 3 at a time after a prescribed period from the restarting of the cooling operation of a refrigerant compressor 16 or from the end of the delivery operation of ice cream 27. If the measured temperature is lower than a prescribed level, the operation of the compressor 16 is stopped by the temperature signal via an output controller 39, etc.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a stirrer for (mixing) raw materials in a cylinder that is cooled by a cooling device, such as soft cream creep, etc. ), and is applied to devices that control the hardness of soft-serve ice cream by detecting its viscosity.

[Conventional technology]

In conventional equipment for producing frozen desserts using lumps, the system uses the increase in viscosity of soft serve ice cream to adjust the hardness, detects the load on the stirrer, and stops the cooling device. There is a so-called torque type control. This torque type hardness adjustment method includes the following methods.

(1) A method that uses the reversing torque of the stirring electric motor and activates a limit switch when the torque value exceeds the spring force.

(2) A method of activating a limit switch by axial movement using the fact that a stirrer for stirring soft-serve ice cream, etc. is pushed backwards as the hardness increases (Utility Model Publication No. 57-1)
Publication No. 4060 i11! Liri.

(3) The current value and source voltage flowing through the stirring motor,
A method in which the output torque is calculated from the characteristics of the stirring electric motor, and cooling is stopped when the output torque of this electric motor reaches a predetermined value.

[Problems to be Solved by the Invention] In the conventional torque-type hardness control device described above, as long as there is enough soft-serve ice cream, etc. in the freezing cylinder, the soft-serve ice cream, etc. in the cylinder will have an appropriate hardness. If the amount of ice cream is small due to some reason, such as forgetting to replenish raw materials, the load on the agitator as a whole will be small, even if the soft serve ice cream itself has the appropriate hardness.
It cannot be detected using the torque method, which is an external detection method, and as a result, there is a drawback that the cooling becomes extremely hard, such as soft serve ice cream, without stopping.

Therefore, the present invention is a method for manufacturing frozen desserts that can solve the problem of over-cooling when there is not enough soft-serve ice cream or the like in a freezing cylinder using a hardness adjusting device that detects its viscous resistance. The purpose is to provide a

[Means for solving problems]

The present invention achieves the above object. Next, the frozen dessert or its raw materials are stirred by an agitator in a cylinder cooled by a cooler of a freezing device to produce a frozen dessert. In a frozen dessert manufacturing apparatus in which the operation of the container is controlled by a hardness adjustment device and a frozen dessert removal detection device, a temperature sensor is attached to the cooler, and a predetermined period of time has elapsed from the start of recooling operation when frozen desserts are not taken out. The apparatus is provided with means for stopping the cooling operation when the temperature detected by the temperature detector is below a predetermined value after a predetermined period of time has elapsed from the end of the frozen dessert removal operation.

[Effect]

With the above configuration, the cooling operation is stopped when the temperature detected by the temperature detector is below a predetermined value, so it is possible to eliminate the problem of frozen desserts such as soft serve ice cream becoming too cold.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to FIG. 1 is a cylinder for making soft-serve ice cream, etc., 2
is a stirrer for stirring soft-serve ice cream, etc. 3 is cylinder 1
4 is a lid on the side for taking out soft-serve ice cream, etc. in the cylinder 1; 5 is a granger that is pressed downward by a spring 7 and opens the take-out port 4a of the lid 4 when the lever 6 is raised; 8; 9 is a precooler that stores and cools liquid raw materials such as soft cream, and 9 supplies liquid raw materials from precooler 8 into cylinder 1, and maintains the height of soft cream, etc. in cylinder J to the lower end. for carburetor tube,
10 is a pulley fixed to the shaft 2f, 11 is a stirring electric motor, 12 is a pulley fixed to the output shaft of the stirring electric motor 11, 13 is a V-belt for rotation transmission, and 14 is attached to the outer surface of the cooler 3. A fixed thermistor, 15 is a cup switch that closes the contact when the planter 5 moves upward and takes out soft serve ice cream, etc. 16 is a refrigerant compressor, 17 is a refrigerant discharge pipe,
18 is a refrigerant condenser, 19 is a blower fan for the condenser, 20 is a solenoid valve that is permanently closed and opens when energized, and 2 is a capillary tube that connects the condenser 18 to the precooling pipe 22 connected to the precooler 8. , 23 is a capillary tube connecting the solenoid valve 20 to the cooler 3, 24
25 is a suction pipe connecting the cooler 3 and the compressor 16, and 25 is a capillary tube connecting the precooling pipe 22 and the suction pipe 24.

The stirrer 2 includes a shaft Zf, a back plate 2e integral with the shaft 2f,
A rigid shaft 2d and a blade 2 are integral with the back plate 2e.
a1 helix 2b, and rotatably held on a shaft 4b integral with the lid 4 n1 blade 2a, helix 2b, rigidity @2
d, and a feeding propeller 2C, which is integral with each other. Note that the shaft 2f is rotatably held by the bearing portion 1a of the cylinder 1.

Reference numeral 26 indicates a liquid raw material, and 27 indicates a liquid raw material in the cylinder 1 or a soft serve ice cream produced by cooling.

Further, a heat insulating material (not shown) is provided around the cooler 3 and precooler 8 to reduce heat intrusion.

30 is a power supply, and 31 is a control device for controlling the operation of the soft serve ice cream freezer. This control device 30
stores the characteristics of the voltage detector 32 for detecting the voltage supplied to the device, the frequency detector 33 for detecting the frequency of the power source 30, and the stirring electric motor 11. The electric motor data storage device 34, the current detector 35 for detecting the current flowing through the electric motor 11 for stirring, the voltage and frequency of the power supply 30, the value of the current flowing through the electric motor 11 for stirring, and the motor data, the electric motor for stirring A calculator 36 for calculating the output torque of No. 11, a comparator 37 for comparing the calculated torque value with a set torque value, and a comparator 37 for comparing the calculated torque value with the set torque value. a next timer 38 that starts cooling again when a predetermined time +1i1 has elapsed since then; and an output controller 3 that instructs the cooling device and stirring motor 11 to start and stop.
It consists of 9. 40 is a torque value setting device which can be set from the outside after adjusting the hardness, and 43 is a timer.

In the above configuration, the liquid raw material 26 is input from the precooler 8.
Then, the liquid raw material 26 flows into the cylinder 1 from the capretor tube 9, and when it reaches the lower end of the capretor tube 9, the flow stops and is maintained at a constant height within the cylinder 1.

When the power supply 30 is turned on, the output controller 39Fi commands the compressor blower fan 19 to operate, and the solenoid pulp 2
When 0 is opened, operation of the electric stirring electric @11 is also commanded.

Although the compressor 16 and stirring motor 11 may start operating at the same time, it is common practice to start them at a certain interval to avoid an excessive starting current.

The refrigerant compressed by the compressor 16 is passed through the refrigerant discharge pipe 17.
The solenoid pulp 20 is passed through the condenser 18 to become a condensed liquid, and the pressure is reduced by the capillary tube 23, and it flows into the cooler 3 where it is evaporated, cooled to a liquid raw material 22', and passed through the suction pipe 24. Return to compressor 16.

A part of the refrigerant passes through capillary Cheap 2 and is depressurized.
It is evaporated by pre-cooling g22, and the liquid raw material 26 is cooled and returned to the suction snow 24 through the capillary tube 25.

When the liquid raw material 26 reaches a suitable hardness for soft serve ice cream or the like 22, the electric current flowing through the stirring electric motor 1 gradually increases. This current value is detected by the current detector 35, t''LfC detected by the voltage detector 32, and calculated using the source frequency n'fc'lE detected by the power supply, voltage and frequency detector 33. In the device 36, the n1 output torque value is calculated by comparison with the motor data stored in the motor data storage device 34.

This output torque value is compared in the comparator 37 with the torque value set in the setting device 40, and if it exceeds the set torque n1, a signal is sent to the output controller 39. When the signal is sent from the comparator 37, the output controller 39 commands to stop the compressor 16, the condenser fan 19, and the stirring electric motor 11, and closes the solenoid pulp 20. At the same time, a signal is sent to the timer 38, and the timer 38 starts counting.

Even when the compressor 16 is stopped, the refrigerant in the AM device 18 flows through the capillary tube 21 into the precooling pipe 22, cooling the liquid raw material 26 in the precooling 8 and keeping it at 4°C to 10°C. When a predetermined period of time has elapsed, the timer 38 sends a signal to the output controller 39, and the output controller 39 instructs the operation again. In this way, the soft cream etc. 27 is maintained at a predetermined hardness set by the setting device 40.

7t cream, etc. 27fI: When taking out, use the lever 6t.
- When raised, the plunger 5 rises, opens the outlet 4a, and the upper end of the syringe 5 pushes the cup switch 15, causing the contact to open from open or from close.

While the syranger 5 is pressing the cup switch 15,
The output controller 39 continues to command the operation.

Therefore, the stirring electric motor 11 rotates, and therefore the stirrer 2 rotates, causing the cream to cool down. is outlet 4
The liquid raw material 26 of the pre-cooler 8 is fed from n1 from a and flows into the cylinder 1 from the carburetor tube 9 after being replenished with the soft cream etc. 27 that was sent out.

When the lever 6 is lowered, the syringe 5 is lowered, the outlet 4a is closed, and the contact of the cup switch 15 changes from closed to open, or
The circuit goes from open to closed. After that, as mentioned above, operation D3
While the output torque value calculated in step 6 is lower than the torque value set in the setting device 40, the output controller 39 continues to instruct the continuation of operation, and the output torque value calculated in step 6 is lower than the torque value set in the setting device 40. When the torque exceeds the torque value set in step 40, the output controller 39 commands to stop the operation.

During this period, the liquid raw material 2 supplied into the cylinder 1
When the amount of the stirrer 6 is small, the load on the stirrer 2 is small even if the soft cream etc. 27 reaches an appropriate hardness, and therefore the current flowing through the stirring motor 1 remains small. In this case, cooling operation will continue, but timer 3
8 gives an operation command to the output controller 39, or when the power, push, and switch 15 release the on-sale signal, the timer 43 starts counting. This timer 43 continues counting while the output controller 39 issues an operation command. After a predetermined period of time (for example, 3 minutes) has elapsed, the timer 43
If the output controller 39 instructs to continue operation even after completing the count, if the temperature detected by the thermistor 14 at this point is below a predetermined value, the output controller 39 will stop the operation. The timer 38 starts counting.

The above operation will be repeated from now on.

〔Effect of the invention〕

According to the present invention described above, when there is not enough frozen dessert such as soft serve ice cream in the freezing cylinder, the hardness adjusting device that detects the viscous resistance of the soft serve ice cream etc. controls the soft serve ice cream to be too cold. It is possible to provide a frozen dessert manufacturing apparatus that can solve the problem of consuming frozen desserts.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing an embodiment of the frozen dessert manufacturing apparatus of the present invention. DESCRIPTION OF SYMBOLS 1... Cylindrical cylinder, 2... Stirrer, 3... Cooler, 14... Thermistor, 15... Cup switch, 38... Timer, 39... Output controller, 43・
...Timer.

Claims (1)

[Claims] Frozen desserts or their raw materials are stirred by a stirrer in a cylinder cooled by a cooler of a freezing device to produce frozen desserts, and the operation of the freezing device and stirrer is controlled by a hardness adjustment device and a frozen dessert removal detection device. In the frozen dessert manufacturing apparatus, a temperature sensor is attached to the cooler, and the temperature sensor is installed after a predetermined time has elapsed from the start of the re-cooling operation when the frozen dessert is not taken out, or after a predetermined time has elapsed from the end of the frozen dessert takeout operation. 1. A frozen dessert manufacturing apparatus, comprising: a means for stopping a cooling operation when a detected temperature of the apparatus is below a predetermined value.