JPS6221490B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Industrial Application Field The present invention relates to a soft-serve ice cream manufacturing machine that supplies liquid mix in a mix tank to a freezing cylinder and manufactures soft-serve ice cream within the cylinder. and mix tank,
Furthermore, the present invention relates to a soft serve ice cream manufacturing machine equipped with means for heating these contents.

(b) Prior Art A conventional soft serve ice cream manufacturing machine of this type uses electric resistance heating in the mix supply tank and freezer cylinder to heat each part of the machine, as described in Italian Patent No. 736656, for example. It is proposed that equipment be equipped.

(c) Problems to be solved by the invention However, it is extremely difficult to put into practical use the installation of an electric resistance heater that directly contacts the mix supply tank and the freezer cylinder due to the relationship with the cooling system. Even if it were possible, the structure would be complicated and it would be economically disadvantageous, and furthermore, it would be necessary to make major improvements to the existing soft-serve ice cream manufacturing machine.

Therefore, the present invention provides a soft serve ice cream making machine that has a simplified structure and is equipped with an economically advantageous heating means without significantly improving existing soft serve ice cream making machines.

(d) Means for Solving the Problems The present invention is a soft serve ice cream manufacturing machine that supplies mix in a mix tank to a freezing cylinder and produces soft serve ice cream in the cylinder, and the machine supplies the mix in a mix tank to a freezing cylinder to produce soft serve ice cream in the cylinder. Based on the operation of the switching means, the soft-serve ice cream making machine forms a hot gas circuit that heats and softens the remaining soft-serve ice cream in the freezing cylinder, and also forms a drive circuit for the electric motor that rotates the stirring device placed inside the freezing cylinder. This solves the above problems.

(e) Effect The present invention is such that when a switch serving as a switching means is operated in a cooling state of a refrigeration cylinder in which low-temperature refrigerant gas is circulated through a refrigerant pipe, the circulation of low-temperature refrigerant gas through the refrigerant pipe is stopped and replaced by a switch. This creates a hot gas circuit in which hot gas is circulated through the refrigerant pipe to heat the freezing cylinder, as well as a drive circuit for the electric motor that rotates the stirring device. It can be used effectively.

(F) Embodiment An embodiment of the present invention will be described below based on the drawings. Fig. 1 shows a soft-serve ice cream manufacturing machine having the apparatus of the present invention. It is divided into a machine room 3 and a lower hot water supply room 4, and the soft-serve ice cream manufacturing room 2 includes a mix tank 5 for storing mix, a freezing cylinder 6 for producing soft-serve ice cream, and a mixer for supplying the mix into the freezing cylinder 6. The refrigeration cylinder 6 is linked to the supply device 7 and the drive device 8.
A stirring device 9 for stirring and discharging the soft serve ice cream produced in the interior, a soft serve ice cream dispensing device 12 having a soft serve ice cream dispensing lever 10, a sales outlet 11, etc., a refrigerant pipe for cooling the mix in the mix tank 5 and the freezing cylinder 6. 13
etc. are arranged. Further, in the machine room 3 in the middle part, there is a partition plate 14 that partitions the machine room 3 and the hot water supply room 4 in the lower part.
An electric compressor 15 and a condenser 16, which together with the mix tank 5 and the refrigerant pipe 13 for cooling the freezing cylinder 6 form a refrigerant circuit, are disposed above.
Further, 17 is a fan for air cooling the condenser 16, and 18 is an electric motor that is a power source for the drive device 8. Furthermore, a water heater 21 having a heating device such as a heater 19 and a thermostat 20 for controlling water temperature is disposed in the lower hot water chamber 4.
A liquid level control device 24 consisting of a float 22 and a liquid level switch 23 that opens and closes contacts at the float 22 is connected, and the device is connected to a water source via an electromagnetic opening/closing valve 25 controlled by the switch 23. The water level in the water heater 21 is maintained at a predetermined level. Also, 26 is a water supply pipe facing the mix tank 5, and 26 is a hot water pipe facing the mix tank 5. When cleaning after closing, the hot water in the water heater 21 is sucked up by the pump device 28, and from the hot water pipe 27 to the mix tank 5, and further to the mix tank 5. Hot water is automatically supplied into the refrigeration cylinder 6 via the refrigeration cylinder 7.

Next, the electric circuit of the present invention will be explained based on FIG. 2. The liquid level switch 23 is connected between the power lines 29 and 30 via a normally closed second relay contact 31b, Side contact 23
The above thermostat 20 and heater 19 are installed in a.
is connected, and the electromagnetic opening/closing valve 25 is connected to the low water level side contact 23b. Also, at the cleaning side contact 32a of the cleaning and cooling changeover switch 32, a first relay 3, which is a control device for the hot gas circuit, is connected.
3 is connected, and the second relay contact 31a ₁ is also normally open.
A timer motor 34 is connected via. Further, 35 controls the hot water supply time with a timer switch of the timer motor 34;
The normally open contact 35a of No. 5 is connected to the timer motor 34.
and the normally open second relay contact 31a ₁ , and the parallel circuit of the other normally open second relay contact 31a ₂ and the automatic return type hot water supply command switch 36 via the normally closed contact 35b and the hot water supply pump device. A parallel circuit of the electric motor 37 and the second relay 31 is connected in series. Further, the normally open first relay contact 33a ₁ and the hot gas valve 38 are connected in parallel with another normally open first relay contact 33a ₂ and an electric compressor driving electric motor 39 via the cleaning side contact 32a.

Note that the hot gas valve 38 is energized by the first relay 33, so that the contacts 33a ₁ ,
_33a2 is closed and opened, at which time hot gas flows into the refrigerant pipe 13 to form a hot gas circuit for heating the freezing cylinder 6 and mix tank 5. Further, 40 is an interlocking switch that is interlocked with the changeover switch 32 and also has a cooling contact 40b and a cleaning contact 40a.The cleaning contact 40a of the interlocking switch 40 is connected to the cleaning side contact 32a of the changeover switch 32, and the cooling contact 40b is connected to a common contact 41c of a supply switch 41 controlled by the take-out lever 10. Further, 42 is an electric motor for driving the stirring device connected between the common contact 40o of the interlocking switch 40 and the power supply line 30. Further, the cooling side contact 32b of the changeover switch 32 is connected to the compressor driving electric motor 39 via a control thermostat 43 that controls the electric compressor 15 so as to maintain the temperature inside the refrigeration cylinder 6 constant during cooling operation. ,
A refrigerant is flowed through the refrigerant pipe 13 to form a refrigerant circuit for cooling the freezing cylinder 6 and mix tank 5. Also, the normally open contact 41a of the supply switch 41
is connected to the cooling side contact 32b of the changeover switch 32, and the normally closed contact 41b is also connected to the deterioration side contact 32b via the control thermostat 43.
It is connected to the. The supply switch 41 is controlled by the take-out lever 10, and when the take-out lever 10 is in an upright state, the supply switch 41 is located on the normally closed contact 41b side, and at this time, the inside and outside of the freezing cylinder 6 are cut off. When the take-out lever 10 is pulled forward, the supply switch 41 is located on the normally open contact 41a side, and at this time, the inside and outside of the refrigeration cylinder 6 are in communication,
The soft serve ice cream in the freezing cylinder 6 can be taken out to the outside. Furthermore, the above changeover switch 3
2 and the interlocking switch 40 have OFF contacts 32o and 40o.

To explain the operation based on the above configuration and electric circuit, the amount of water in the water heater 21 is normally controlled by the liquid level control device 2.
4, the contact of the liquid level switch 23 is switched to the low water level side contact 23b, so the power supply 29 → normally closed second relay contact 31b → the low water level of the liquid level switch 23 The electromagnetic on-off valve 25 operates via the side contact 23b, opens the valve 25, and supplies water into the water heater 21. When the amount of water reaches a predetermined amount, the float 22 switches the contact point of the liquid level switch 23 to the predetermined water level side contact 23a, so that the heater 19 is activated via the thermostat 20.
Electricity is supplied to heat the water, and the thermostat 20 maintains the water at an appropriate temperature. Further, the normal soft serve ice cream selling operation is performed by switching the changeover switch 32 to the cooling side contact 32b. At this time, the interlocking switch 40 interlocked with the switch 32 is also switched to the cooling contact 40b. And power supply 29 → cooling side contact 32 of changeover switch 32
b→Electricity is supplied to the compressor drive electric motor 39 via the control thermostat 43, and the electric compressor
operates and the refrigeration cylinder 6 and mix tank 5
A refrigerant circuit for cooling is formed. Also power supply 29→
Cooling side contact 32b of changeover switch 32 → control thermostat 43 → supply switch 41
Normally closed contact 41b → cooling contact 40b of interlocking switch 40 to energize the stirring device electric motor 42, so the stirring device 9 rotates to prevent the soft-serve ice cream in the freezing cylinder 6 from hardening and to make soft-serve ice cream with just the right amount. Manufacture. However, although the stirring device 9 is rotating, the supply switch 41 is located on the normally closed contact 41b side. That is, take-out lever 1
0 is in an upright state, and the freezing cylinder 6 is cut off from the outside, so the soft serve ice cream inside the freezing cylinder 6 is not delivered to the outside. Then, when the take-out lever 10 is pulled forward, the supply switch 4
The contact No. 1 is switched from the normally closed contact 41b to the normally open contact 41a side, and the inside and outside of the refrigeration cylinder 6 are brought into communication.

Therefore, the power supply 29 → the cooling side contact 32b of the changeover switch 32 → the normally open contact 41 of the supply switch 41
Since the stirring device driving electric motor 42 continues to operate via the cooling contact 40b of the a→interlocking switch 40, the soft serve ice cream in the frozen cylinder 6 is taken out from the sales outlet 11 by the stirring device 9. Then, when the take-out lever 10 is returned to the upright position again, the inside and outside of the freezing cylinder 6 are shut off and delivery of the soft serve ice cream is stopped. From the above explanation, the sales operation of soft serve ice cream should be understood.

Next, we will explain the cleaning and drying operations of the freezing cylinder 6, mix tank 5, etc. after the closing point.Before starting the cleaning operation, we must collect the remaining soft serve ice cream inside the freezing cylinder 6. . However, the remaining soft serve ice cream on the lever is hardened to some extent even after the cooling operation is stopped, and adheres to the stirring device 9 or the inner surface of the freezing cylinder 6 as a lump. Therefore, after closing, the changeover switch 32 is switched from the cooling side contact 32b to the cleaning side contact 32a. As a result of this switching operation, the refrigerant circuit is cut off and the cleaning side contact 32a of the power supply 29→changeover switch 32 is disconnected.
After that, the first relay 33 is energized. At this time, the normally open first relay contact 33a ₁ and the other normally open first relay contact 33a ₂ are closed, and the power supply 29 → the cleaning side contact 32a of the changeover switch 32 → the normally open first relay contact 33a 1 and the normally open first relay contact 33a 2 are closed.
The hot gas valve 38 is opened via the relay contact _33a1 . Also, power supply 29 → changeover switch 32
The compressor motor 39 is energized through the cleaning side contact 32a and the other normally open first relay contact _33a2 to form a hot gas circuit, and hot gas flows through the refrigerant pipe 13. Therefore, the freezing cylinder 6 and the mix tank 5 are heated, thereby quickly softening the remaining soft serve ice cream adhering to the inner surface of the freezing cylinder 6, and the remaining soft serve ice cream adhering to the stirring device 9. At this time, the power supply 29 → the cleaning side contact 32a of the changeover switch 32
→Electricity is applied to the stirring device electric motor 42 through the cleaning contact 40a of the interlocking switch 40, and the stirring device 9 rotates, so that the stirring heat generated by this rotational energy quickly softens the material. To remove remaining soft serve ice cream, use take-out lever 1.
By subtracting 0, it can be easily taken out from the sales outlet 11 in a short time.

After all the soft serve ice cream remaining in the freezing cylinder 6 is collected as described above, the mix tank 5 and the freezing cylinder 6 are washed and dried. First, the changeover switch 32 continues to be switched to the cleaning side contact 32a. At this time, the interlock switch 40 is also located at the cleaning contact 40a.

Therefore, the first relay 33, which is a control device for the hot gas circuit, is energized, and the hot gas circuit continues to be formed. Note that the hot water supply circuit to the mix tank 5 and the freezing cylinder 6 is enabled to operate by switching the changeover switch 32 to the cleaning side contact 32a, but is not allowed to operate until the collection of the remaining soft serve ice cream is completed.

The hot water supply circuit is formed by operating the hot water supply command switch 36. When the hot water supply command switch 36 is pressed, the power supply 29 → the cleaning side contact 32a of the changeover switch 32 → the timer switch 3
The second relay 31 is energized via the normally closed contact 35b of No. 5 and the hot water supply command switch 36,
is the other normally open second relay contact 3 that closes at this time.
Self-preserving via 1a ₂ . Also, the power supply 29 → the cleaning side contact 32a of the changeover switch 32 → the normally closed contact 35b of the timer switch 35 → the other normally open second
The electric motor 37 for the hot water pump device is energized through the relay contact _31a2 to operate the pump device 28, and the hot water in the water heater 21 is sent to the mix tank 5 via the hot water pipe 27, and further into the refrigeration cylinder 6 via the mix feeder 7. supply hot water to Furthermore, at this time, the normally open second relay contact _31a1 closes, and the timer motor 34
energize.

and mix tank 5 and freezing cylinder 6
When the predetermined time set to the time required to supply the appropriate amount of hot water to the interior of the room has elapsed, the timer switch 3
The contact No. 5 switches from the normally closed contact 35b to the normally open contact 35a side, and the power to the second relay 31 is cut off, and the other normally open second relay contact 31a ₂ returns to normal, so the hot water supply electric motor 37 Electricity is cut off and hot water supply ends. Furthermore, the normally open second relay contact 31a ₁
is also open, but timer switch 35 is normally open contact 3
By switching to the 5a side, power continues to be applied to the timer motor 34 via the power supply 29 → the cleaning side contact 32a of the changeover switch 32 → the normally open contact 35a of the timer switch 35, and the contact of the timer switch 35 is changed to the normal state. The timer switch 35 operates until the normally closed contact 35b returns to its position.
When the contacts return to normal, the power to the timer motor 34 is cut off and the hot water supply circuit enters a reset state. Note that during hot water supply, even if the hot water in the water heater 21 decreases and the contact of the liquid level switch 23 returns to the low water level contact 23b, the normally closed second relay contact 31b remains open, so water is not supplied to the water heater 21. There is nothing unreasonable about lowering the temperature of the hot water inside 21. Then, depending on the supplied hot water, a mixture tank 5, a mixture supply device 7,
Mix and soft serve ice cream adhering to the freezing cylinder 6 and stirring device 9 are dissolved and cleaned. Since the hot gas circuit is still formed even during the hot water supply and cleaning operations described above, even if the hot water is kept in the freezing cylinder 6 and mix tank 5 for a while, the temperature of the hot water may suddenly drop. The dissolution and cleaning operations can be performed more efficiently without any problems. Furthermore, the power supply 29 → the cleaning side contact 32a of the changeover switch 32 → the cleaning contact 40 of the interlocking switch 40
Since the electric motor 42 for the stirring device is energized via the point a, and the stirring device 9 is rotated, the cleaning efficiency inside the freezing cylinder 6 is further increased. Furthermore, the hot water can be easily drained by pulling the take-out lever 10 forward to communicate the refrigeration cylinder 6 with the outside in the same manner as the selling operation.

After the hot water is completely drained from the freezing cylinder 6 and the mix tank 5, the hot gas circuit is connected to the freezing cylinder 6, the stirring device 9 in the cylinder 6, the mix supply device 7, and the mix tank 5.
It acts as a dryer for drying the freezing cylinder 6, mix tank 5, etc., and does not require wiping with a cloth or the like.

As described above, after the selling operation → residual soft serve ice cream collection operation → hot water supply operation → melting → washing operation → hot water discharging operation → drying operation, the changeover switch 32
Switch to OFF contact 32o and complete all operations.

Note that the reduced amount of hot water in the water heater 21 is recovered by the normally closed second relay contact 31, which returns to normal when one hot water supply is completely completed and the power to the second relay 31 is cut off.
Since the water supply operation and then the heating operation are performed again via the switch b, even when cleaning is to be performed again the next morning, hot water can be immediately supplied by switching the changeover switch 32 to the cleaning side contact 32a and pressing the hot water supply command switch 36. Of course, as is clear from the above description, since a hot gas circuit is also formed, operations from hot water supply to drying can be quickly performed.

(G) Effects of the Invention As described above, the present invention is capable of heating a freezing cylinder and a mixer tank with a simple structure without significantly improving an existing soft serve ice cream making machine. The present invention is capable of switching the frozen cylinder and mix tank from the cooling state to the heating state where they are heated by hot gas by the operation of . The hot gas circuit can be used effectively for recovery work, and the stirring heat of the stirring device is also effectively used.
The remaining soft serve ice cream adhering to the inner surface of the freezing cylinder and the stirring device can be quickly softened, and the remaining soft serve ice cream can be easily recovered in a short period of time, which has a remarkable effect.

[Brief explanation of the drawing]

FIG. 1 is an internal configuration diagram of a soft serve ice cream manufacturing machine of the present invention, and FIG. 2 is an electrical circuit diagram of the present invention. 5... Mix tank, 6... Refrigeration cylinder, 13... Refrigerant pipe, 15... Electric compressor,
32... Selector switch, 38... Hot gas valve.

Claims (1)

[Claims] 1. In a soft serve ice cream manufacturing machine that supplies mixes in a mix tank to a frozen cylinder to produce soft serve ice cream, hot gas is used to heat and soften the remaining soft serve ice cream in the frozen cylinder based on the operation of a switching means to switch the frozen cylinder in a cooling state. A soft serve ice cream making machine characterized in that a circuit is formed and a drive circuit for an electric motor that rotationally drives a stirring device arranged in a freezing cylinder is formed.