JP3342320B2 - Operation control method for frozen dessert production equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling the operation of a frozen dessert production apparatus for producing desserts such as soft ice cream and shakes.

[0002]

2. Description of the Related Art FIG. 5 shows an example of a conventional frozen dessert production apparatus. A first cooler 21 is provided around the raw material tank 8 for storing the liquid frozen dessert raw material 24 for cooling the raw material tank 8. A second cooler 3 for cooling the frozen dessert raw material 24 supplied from the raw material tank 8 is provided around the freezer cylinder 1 which cools the frozen dessert raw material 24 while stirring to produce the frozen dessert. The raw material tank 8 and the freezer body 1 are covered with a heat insulating material 32.

When the frozen dessert raw material 24 is loaded into the raw material tank 8, a part of the frozen dessert raw material 24 enters the freezer body 1 through the hole 10 through the carburetor tube 9, and is filled in a predetermined amount.

During the cooling operation, the refrigerant gas discharged from the compressor 15 passes through the four-way valve 16 through the condenser 16 as shown by the solid line arrow.
The water enters the heat transfer tube 17 and radiates heat to the cooling water flowing through the heat transfer tube 18 to condense and liquefy. This liquid refrigerant is branched into two, one of which is adiabatically expanded by being throttled by the first electric expansion valve 20, and then is vaporized and vaporized in the course of flowing through the first cooler 21, and its latent heat of vaporization causes The frozen dessert material 24 in the tank 8 is cooled.

The other is adiabatically expanded by being throttled by the second electric expansion valve 22 and then evaporated and vaporized in the second cooler 3 to cool the frozen dessert raw material 24 in the freezer body 1 by its latent heat of evaporation. The refrigerant gas evaporated in the first cooler 21 flows through the capillary tube 5, then joins with the refrigerant gas evaporated in the second cooler 3, and passes through the four-way valve 16 to the compressor 15.
Inhaled.

During this time, the frozen dessert raw material 24 in the freezer body 1 is stirred by the stirrer 2 driven by the electric motor 7 via the rotating shaft 4.

When the cooling operation is continued for a while, the frozen dessert raw material 24 in the freezer body 1 freezes to become a frozen dessert 25. Thereafter, the cooling operation is stopped and repeated to repeat
Is maintained at a predetermined hardness.

When the lever 11 of the take-out device 26 is lifted upward, the plunger 14 moves upward via the rod 12 against the elastic force of the spring 23, and the take-out switch 13 is closed accordingly. At the same time, the through hole 31 is opened. Then, the frozen dessert 25 in the freezer body 1 is pushed by the stirrer 2 and taken out from the outlet 33 through the through hole 31.

When the lever 11 is lowered, the take-out switch 13 is opened and the through hole 31 is closed. If the refrigerator is stopped when the removal switch 13 is closed, the cooling operation of the refrigerator is restarted by a signal from this.

If the taking out of the frozen dessert 25 is to be stopped for a long time, a heat sterilization operation is performed prior to this in order to heat sterilize the frozen dessert raw material 24 in the raw material tank 8 and the frozen dessert raw material 24 and the frozen dessert 25 in the freezer body 1. Will be

During the heating operation of the refrigerator, the refrigerant gas discharged from the compressor 15 is branched into two via a four-way valve 16, one of which is passed through a check valve 6, as shown by a dashed arrow. Cooler
The frozen dessert material 24 in the material tank 8 is condensed and liquefied by heating in the course of flowing through 21, and then adiabatically expanded by being throttled by the first electric expansion valve 20.

The other enters the second cooler 3, where the frozen dessert raw material 24 and the dessert 25 in the freezer body 1 are condensed and liquefied by being heated, and then adiabatically expanded by being throttled by the second electric expansion valve 22. I do.

The first motor-operated expansion valve 20 and the second motor-operated expansion valve 22
After flowing through the heat transfer pipe 18, the refrigerant flows into the condenser 17, where the refrigerant evaporates by absorbing heat from the cooling water flowing through the heat transfer pipe 18, and is then sucked into the compressor 15 via the four-way valve 16.

FIG. 4 shows the change over time of the temperature of the frozen dessert raw material 24. When the heating sterilization operation is started by turning on the heating switch, the refrigerator 24 is heated in the heating process, whereby the frozen dessert raw material 24 in the raw material tank 8 rises in temperature from 10 ° C. to 68 ° C. 24 frozen desserts and frozen desserts
25 rises from -6 ° C to 68 ° C.

Next, the process shifts to a heat-retention process, and the heating operation of the refrigerator is performed intermittently, so that the frozen dessert raw material 24 is kept at the legal sterilization temperature and time, that is, at 68 ° C. or more, for 30 minutes or more.

After the statutory time has elapsed, the process shifts to the cooling step, and the temperature of the frozen dessert raw material 24 is reduced to about 10 ° C. by the cooling operation of the refrigerator. Next, the process shifts to the cooling process,
The frozen dessert material is obtained by intermittently performing the cooling operation of the refrigerator.
The temperature of 24 is maintained at about 10 ° C.

When the cooling switch is turned on, the refrigerator performs a cooling operation, whereby the frozen dessert material 24 in the raw material tank 8 is operated.
Is maintained at 10 ° C., and the temperature of the frozen dessert raw material 24 in the freezer barrel 1 drops to −6 ° C. and is maintained at this temperature.

[0018]

When a power failure occurs during the heat sterilization operation of the above-mentioned conventional frozen dessert manufacturing apparatus, the heat sterilization operation is automatically performed after the power is restored even if the heat retention process has already been completed. Was restarted from the initial heating process, so that not only was economical and time wasted, but also the frozen dessert raw material 24 in the raw material tank 8 and the freezer body 1 was repeatedly exposed to the high sterilization temperature for legal time. There was a risk of deterioration or discoloration.

[0019] In addition, resume automatically cooling operation and if a power failure occurs during the cooling operation other than the heat sterilization operation is to power recovery is, the raw material tank 8 and freezer body during this time in the case had been prolonged power failure there is a risk that ice confection material 24 in 1 resulting in altered by increasing the temperature.

[0020]

Means for Solving the Problems The present invention was invented to solve the above problems, and has as subject matter of the first invention, the raw material tank for storing ice confection material, this material tank a freezer barrel to produce the ice confection is cooled with stirring ice confection raw material supplied from the material tank及
Comprising a refrigerator for cooling or heating the fine freezer barrel, the original
For heating and sterilizing frozen dessert ingredients in the food tank and the freezer body
In this case, the refrigerator is heated and the frozen dessert raw material is
Heating process to raise the temperature to the sterilization temperature and intermittent operation of the refrigerator
The above-mentioned frozen dessert material is killed to a predetermined
A heat-retention process for maintaining the temperature at the germ temperature for a predetermined time;
Cooling operation to cool the above frozen dessert ingredients to the specified cold storage temperature
Cooling process and intermittent cooling operation of the refrigerator
Refrigeration line that keeps the frozen dessert material at the above refrigeration temperature
In the frozen dessert manufacturing apparatus that performs the heat sterilization operation in which the above steps are performed in this order, if a power failure occurs during the cooling process of the heat sterilization operation, the temperature of the frozen dessert raw material in the raw material tank and the freezer body at the time of the subsequent power restoration. if less than the cold temperature resumes the heating sterilization operation from the cold process, one of the temperature of the ice confection material is the heat sterilization operation from the heating process after the power failure display if more than the cold temperature An operation control method for a frozen dessert manufacturing apparatus characterized by restarting.

[0021] It is an another feature, when a power failure occurs during stroke other than cold stroke of the heat sterilization operation, temperature <br/> of the subsequently restored upon the raw material tank and a cold菓原charges in freezer barrel the heat from the heating process after the power failure display regardless
To restart the sterilization operation.

[0022] It is a gist of the second invention, a raw material tank for storing ice confection material, a freezer barrel to produce a frozen dessert ice confection raw material supplied from the material tank was cooled with stirring, the raw material tank And in a frozen dessert manufacturing apparatus equipped with a refrigerator for cooling the freezer cylinder, when a power failure occurs during the cooling operation of the refrigerator, when the power is restored , the temperature of the frozen dessert material in the raw material tank and the freezer cylinder are both predetermined. If the temperature is equal to or lower than the cooling temperature, the cooling operation of the refrigerator is restarted, and if one of the temperatures of the frozen dessert material is equal to or higher than the predetermined cooling temperature, the cooling operation of the refrigerator is restarted after the power failure display. The operation control method of the frozen dessert manufacturing apparatus described above.

[0023]

1 and 2 show a first embodiment of the present invention. FIG. 1 is a control flowchart, and FIG. 2 is a control block diagram.

As shown in FIG. 2, when the ON signal of the cooling switch 39 or the heating switch 40 is input, the operation control means
41 is the first for detecting the temperature of the frozen dessert raw material 24 in the raw material tank 8
The temperature detected by the temperature sensor 42 and the frozen dessert raw material 24 in the freezer body 1
The temperature detected by the second temperature sensor 43 for detecting the temperature of the food, the current detected by the current sensor 44 for detecting the current supplied to the frozen dessert manufacturing apparatus, the time measured by the timer 45, and the control procedure input from the storage 46 According to the compressor via output means 47
15, electric motor 7 for stirrer, four-way valve 16, first electric expansion valve 20,
Output to the second electric expansion valve 22 and the display 48 to control them.

As shown in FIG. 1, when the control is started, it is confirmed in a step whether or not the heating sterilization operation is being performed.
If during heat sterilization operation, when the power failure is detected by the current sensor 44 in step, whether or not the cold stroke is determined in step.

If the current recovery is detected by the current sensor 44 in the step during the cooling process, the first step is performed in the step.
The temperature detected by the temperature sensor 42 and the second temperature sensor 43, that is,
Both the temperature of the frozen dessert raw material 24 in the raw material tank 8 and the temperature of the frozen dessert raw material 24 in the freezer cylinder 1 are equal to a predetermined cooling temperature, namely
It is checked whether it is below ° C.

In such a case, the storage means 46 is executed in steps.
The operation control means 41 determines that the operation is to be restarted from the cold-holding process in accordance with the command from the CPU, and this determination is output via the output means 47, and the refrigerator restarts the operation from the cold-holding process of the heat sterilization operation. The cooling operation of the refrigerator is intermittently repeated so that the temperatures detected by the temperature sensor 42 and the second temperature sensor 43 do not become higher than the cooling temperature.

If not, that is, if either the temperature of the frozen dessert material 24 in the raw material tank 8 or the temperature of the frozen dessert material 24 in the freezer cylinder 1 is equal to or higher than a predetermined cooling temperature, the display 48 is displayed in a step. After outputting and displaying a power failure here, the operation is restarted from the initial heating step in step.

When it is determined to be no in the step, that is,
If a power failure occurs during the temperature raising, warming, and cooling processes other than the cold keeping process, when the power is restored in the subsequent steps, the raw material tank 8
After the power failure display is performed in step regardless of the temperature of the frozen dessert material 24 in the freezer body 1, the operation is restarted from the initial temperature rising step in step.

Control Flowchart of Second Embodiment of the Present Invention
The seat is shown in FIG. In the second embodiment, during the cooling operation, when the power is cut off at the step and the power is restored at the step, whether the temperature of the frozen dessert material 24 in the raw material tank 8 and the freezer body 1 is equal to or lower than a predetermined cooling temperature is determined at the step. Is determined.

In such a case, the cooling operation is restarted in the step. In the case of no, the cooling operation is restarted in the step after displaying the power failure display in the step. Other configurations and operations are the same as those of the first embodiment shown in FIGS.

[0032]

According to the first aspect of the present invention,
If a power failure occurs during the cooling process of the heat sterilization operation, if the temperature of the frozen dessert material in the raw material tank and the freezer body is lower than the predetermined cooling temperature at the time of power recovery, heating is performed from the cooling process.
Since the sterilization operation is restarted, the frozen dessert raw materials in the raw material tank and the freezer body are not repeatedly exposed to the high sterilization temperature for a statutory time, so that the deterioration and discoloration of these frozen dessert raw materials can be prevented.

If one of the temperatures of the frozen dessert material is equal to or higher than a predetermined cooling temperature at the time of power recovery , a power failure display is displayed, and the driver is prompted to determine whether or not to discard the frozen dessert material. Can be. If it is not necessary to dispose, the heat sterilization operation is restarted from the initial heating step, so that the frozen dessert raw material can be surely heat sterilized.

If a power failure occurs during a process other than the cooling process of the heat sterilization operation, a power failure display is displayed at the time of power recovery irrespective of the temperature of the frozen dessert material in the raw material tank and the freezer body, thereby disposing of the frozen dessert material. It is possible to prompt the driver to determine whether or not this is the case. If it is not necessary to dispose, the heat sterilization operation is restarted from the initial heating step, so that the frozen dessert raw material can be surely heat sterilized.

According to the second aspect of the present invention, the cooling device is
If a power failure occurs during the cooling operation of the freezer, if the temperature of the frozen dessert material in the raw material tank and the freezer body is lower than the predetermined cooling temperature at the time of subsequent power recovery , the cooling operation of the refrigerator is restarted. , Economic waste can be eliminated.

When the power is restored, the raw material tank and the freezer
If any one of the temperatures of the frozen dessert material inside the body is equal to or higher than a predetermined cooling temperature, a power failure display is performed, so that the driver can be prompted to determine whether or not to discard the frozen dessert material. If it is not necessary to dispose of the refrigerator, the cooling operation of the refrigerator is restarted, so that time and economic waste can be saved.

[Brief description of the drawings]

FIG. 1 is a control flowchart showing a first embodiment of the present invention.

FIG. 2 is a control block diagram of the first embodiment.

FIG. 3 is a control flowchart showing a second embodiment of the present invention.

FIG. 4 is a diagram showing a temporal change of a temperature of a frozen dessert material.

FIG. 5 is a system diagram of a conventional frozen dessert manufacturing apparatus.

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Toshimasa Takahashi 1 Takamichi, Iwazuka-cho, Nakamura-ku, Nagoya-shi Nagoya Laboratory, Mitsubishi Heavy Industries, Ltd. (56) References JP-A-3-292862 (JP, A) JP-A-3-191750 (JP, A) JP-A-5-176686 (JP, A) JP-A-3-191175 (JP, A) German Patent Application Publication 4307321 (DE, A1) (58) (Int.Cl. ⁷ , DB name) A23G 9/00-9/30 F25D 1/00-91/00 JICST file (JOIS) WPI (DIALOG) Food related literature information (food net)

Claims (3)

(57) [Claims] A raw material tank for storing 1. A frozen dessert material, a freezer barrel to produce the ice confection is cooled with stirring ice confection raw material supplied from the material tank, the raw material tank and
Comprising a refrigerator for cooling or heating the freezer barrel, the raw material
Heat sterilization of frozen dessert ingredients in the tank and freezer body
Is operated by heating the refrigerator to kill the frozen dessert ingredients
Heating process to raise the temperature to the bacteria temperature and intermittent
The above-mentioned frozen dessert material is sterilized by a predetermined heating operation.
A warming process in which the temperature is maintained for a predetermined time;
To cool the above frozen dessert ingredients to a predetermined cool temperature
Cooling process and intermittent cooling operation of the refrigerator
Therefore, the cooling process in which the frozen dessert material is maintained at the cooling temperature.
In the ice confection producing device for carrying out performing heat sterilization operation in this order, when a power failure occurs during the cold insulating stroke of the heat sterilization operation, both during the subsequent power recovery temperature of frozen dessert material of the material tank and freezer in the body is the if less cold temperature resumes the heating sterilization operation from the cold process, one of the temperature of the ice confection material can resume the heat sterilization operation from the heating process after the power failure display if more than the cold temperature An operation control method for a frozen dessert manufacturing apparatus, comprising: Wherein if a power failure occurs during stroke other than cold stroke of the heat sterilization operation, subsequent power recovery the raw material tank and a freezer in the body in the cold菓原charge temperature blackout display regardless of
2. The operation control method for a frozen dessert production apparatus according to claim 1, wherein the heat sterilization operation is restarted later from the temperature raising step. A raw material tank for storing wherein ice confection material, a freezer barrel to produce the ice confection is cooled with stirring ice confection raw material supplied from the material tank, the raw material tank and
In a frozen dessert manufacturing apparatus provided with a refrigerator for cooling the freezer body, if a power failure occurs during the cooling operation of the refrigerator, the frozen dessert raw material in the raw material tank and the freezer body at a subsequent power recovery.
The refrigeration if any temperature of not more than a predetermined cold temperature
Restarts the cooling operation of the machine, and if one of the temperatures of the frozen dessert material is equal to or higher than a predetermined cooling temperature , after the power failure display ,
An operation control method for a frozen dessert manufacturing apparatus, wherein a cooling operation of a refrigerator is restarted.