JPH10127231A - Operational control of frozen dessert production unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the discoloration and deterioration of frozen dessert feedstocks and temporal and economical wastes involved in power failure during operation of heat sterilization or chilling operation, in the subject production unit equipped with a feedstock tank to store frozen dessert feedstocks and a refrigerating machine to chill or heat a freezer drum where the aimed frozen dessert is produced by chilling under agitation the feedstocks fed from the tank. SOLUTION: This operational control system is such one that, when a power failure occurred during the cold insulation process of heat sterilization operation made up of temperature raising, thermal insulation, chilling and cold insulation processes, and afterwards, when the normal situation is restored, if the respective temperatures of frozen dessert feedstocks in the tank and freezer drum are not higher than a given cold insulation temperature, the operation is started again from the cold insulation process; in contrast, if either of the temperatures of the feedstocks is not lower than the specified cold insulation temperature, a power failure indication is conducted and the operation is started again from the initial temperature raising process.

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 heating operation is performed prior to this in order to heat and 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. .

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 electric expansion valve 22 and the second electric 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.

If a power failure occurs during the cooling operation, the cooling operation is automatically restarted when the power is restored. Therefore, if the power failure occurs for a long time, the raw material tank 8 and the frozen dessert material 24 in the freezer body 1 rise. There was a risk of deterioration due to heating.

[0020]

DISCLOSURE OF THE INVENTION The present invention has been made to solve the above problems, and a first aspect of the present invention is to provide a raw material tank for storing frozen dessert raw materials and a raw material tank for storing the dessert. In a frozen dessert manufacturing apparatus equipped with a refrigerator that cools or heats a frozen dessert by cooling the supplied frozen dessert raw material while producing the frozen dessert, a heating sterilization operation including heating, warming, cooling, and cooling is performed. If a power failure occurs during the cooling process, if the temperature of the frozen dessert material in the raw material tank and the freezer body is equal to or lower than the predetermined cooling temperature at the time of subsequent power restoration, the operation is restarted from the cooling process, and any of the frozen dessert material temperatures is restored. An operation control method for a frozen dessert manufacturing apparatus is characterized in that if one of them is equal to or higher than a predetermined cooling temperature, a power failure display is performed, and the operation is restarted from an initial heating process.

Another feature is that if a power failure occurs during a process other than the cold-reservation process of the heating and sterilizing operation, a power failure display is performed at a subsequent power restoration regardless of the temperature of the frozen dessert material in the raw material tank and the freezer body. That is, the operation is to be restarted from the initial heating process.

The gist of the second invention is to provide a raw material tank for storing frozen dessert ingredients and a freezer body for cooling or heating a freezer body for producing frozen desserts by stirring and cooling the frozen dessert ingredients supplied from the ingredient tank. In a frozen dessert manufacturing apparatus equipped with a machine, if a power failure occurs during the cooling operation of the refrigerator,
When the power is restored, the cooling operation is restarted if the temperature of the frozen dessert in the raw material tank and the freezer body is equal to or lower than the predetermined cooling temperature, and if any of the temperatures of the frozen dessert is higher than the predetermined cooling temperature, An operation control method for a frozen dessert manufacturing apparatus is characterized in that a power failure is displayed and a cooling operation is restarted.

[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.
During the heating sterilization operation, when a power failure is detected by the current sensor 44 in the step, it is determined in the step whether or not the cooling process is in progress.

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 the predetermined cooling temperature, namely, 10
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.

A second embodiment of the present invention is shown in FIG. In the third embodiment, when the power is cut off during the cooling operation in the step and the power is restored in 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 in 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,
In the case of a power failure during the cooling process of the heating sterilization operation, if the temperature of the frozen dessert material in the raw material tank and the freezer body is equal to or lower than the predetermined cooling temperature at the time of subsequent power recovery, the operation is restarted from the cooling process, so that the raw material tank and The frozen dessert ingredients in the freezer body are not repeatedly exposed to the high sterilization temperature for a statutory time, and therefore, the deterioration and discoloration of these frozen dessert ingredients can be prevented.

If any one of the frozen dessert raw material temperatures is equal to or higher than the predetermined cooling temperature, a power failure display is performed, so that the driver can be prompted to determine whether or not to discard these frozen dessert raw materials. If it is not necessary to dispose, the operation is restarted from the initial heating process, so that the frozen dessert raw material can be surely heated and 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, so that these frozen dessert materials are discarded. It is possible to prompt the driver to determine whether or not the determination is correct. If it is not necessary to dispose, the operation is restarted from the initial heating process, so that the frozen dessert raw material can be surely heated and sterilized.

According to the third aspect of the present invention, when a power failure occurs during the cooling operation, if the temperature of the frozen dessert material in the raw material tank and the freezer body is lower than a predetermined cooling temperature at the time of the subsequent power recovery, the cooling operation is performed. Since the operation is restarted from the process, time and economic waste can be saved.

If any one of the frozen dessert raw material temperatures is equal to or higher than the predetermined cooling temperature, a power failure display is performed, so that the driver can be prompted to determine whether or not to discard these frozen dessert raw materials. If it is not necessary to dispose, the cooling operation 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.

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Toshimasa Takahashi 1 Takamichi, Iwazuka-cho, Nakamura-ku, Nagoya-shi Nagoya Research Laboratory, Mitsubishi Heavy Industries, Ltd.

Claims (3)

[Claims] 1. A frozen dessert manufacturing apparatus comprising: a raw material tank for storing the frozen dessert raw material; and a refrigerator for cooling or heating a freezer body for cooling and heating the frozen dessert raw material supplied from the raw material tank while stirring the frozen dessert raw material. If a power failure occurs during the cooling process of the heating sterilization operation consisting of each of the temperature raising, warming, cooling, and cooling processes, when the power is restored, the temperature of the frozen dessert in the raw material tank and the freezer body is lower than the predetermined cooling temperature. If there is, restart the operation from the cooling process,
An operation control method for a frozen dessert manufacturing apparatus, characterized in that if any one of the frozen dessert raw material temperatures is equal to or higher than a predetermined cooling temperature, a power failure display is performed and the operation is restarted from an initial temperature rise process. 2. If a power failure occurs during a process other than the cold-reservation process of the heating / sterilizing operation, a power failure display is displayed at a subsequent power recovery irrespective of the temperature of the frozen dessert material in the raw material tank and the freezer body. 2. The operation control method for a frozen dessert production apparatus according to claim 1, wherein the operation is restarted from the start. 3. A frozen dessert manufacturing apparatus comprising: a raw material tank for storing the frozen dessert raw material; and a refrigerator for cooling or heating a freezer body for producing a frozen dessert by stirring and cooling the frozen dessert raw material supplied from the raw material tank. If a power failure occurs during the cooling operation of the refrigerator, the cooling operation is restarted if the temperature of the frozen dessert material in the raw material tank and the freezer body is equal to or lower than a predetermined cooling temperature when the power is restored, and the temperature of the frozen dessert material temperature is reduced. An operation control method for a frozen dessert manufacturing apparatus, comprising: displaying a power failure when one of the temperatures is equal to or higher than a predetermined cooling temperature, and restarting the cooling operation.