JP2003111563A - Apparatus for producing frozen dessert - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for producing frozen dessert, capable of preventing cooling water in a water-cooling compressor from being frozen by the decrease of outside air temperature during operation outage time. SOLUTION: The apparatus for producing frozen dessert comprises a hopper hot gas valve 35 and a cylinder hot gas valve 34 each controlling the supply of high-temperature cooling medium to a hopper cooler and a cylinder cooler, a hot gas return sensor 62 detecting the temperature of a pipe through which the cooling medium flowing out from the hopper cooler and the cylinder cooler and joining to each other after coming out from the hopper cooler and the cylinder cooler during heating cycle; wherein a microcomputer 46 works to operate a compressor until the temperature rises up to a prescribed return temperature when the temperature detected by the hot gas return sensor gets to the prescribed lower limit value, and utilize the cooling device as a heat cycle to open the hopper hot gas valve.

Description

Description: BACKGROUND OF THE INVENTION [0001] The present invention relates to a soft ice cream.
The present invention relates to an apparatus for producing frozen desserts such as
You. 2. Description of the Related Art An apparatus of this kind is disclosed in Japanese Utility Model Publication No. 63-2
No. 0304, the compressor, the condensing
Vessel, capillary tube, cooling cylinder and hopper
Cooling device consisting of a cooler installed in (mix tank)
The refrigeration cycle of this cooling device can be controlled by a four-way valve.
Make sure that the liquefied refrigerant is
To cool the cooling cylinder and hopper,
The high-temperature refrigerant from the compressor
The gas (hot gas) is led to the cooler to release the heat, and the cooler
Acts as a radiator to cool the cooling cylinder and hopper.
Some perform heating. [0003] A beater motor is provided in the cooling cylinder.
Installed in the cooling cylinder
While cooling the mix with a cooler,
Stir and mix ice cream and sherbet
It was to be manufactured. [0004] Here, in the winter season and the like,
Production of frozen dessert during business suspension, that is, while the power is on
When the equipment has stopped operating, such as at night
When the outside temperature drops, the condenser is replaced with a water-cooled one
The risk of freezing of the cooling water in the condenser piping
There is. Then, freezing occurs in the water pipe.
And the water-saving valve and water pipe normally connected to it are damaged
For example, there is a problem that parts around the condenser are damaged. Therefore, the present invention solves such a conventional technical problem.
This was done to solve the problem.
If the cooling water in the water-cooled condenser freezes due to
An object of the present invention is to provide a frozen dessert manufacturing apparatus that can eliminate the inconvenience. [0006] The present invention relates to an apparatus for producing frozen desserts.
Is a hopper that stores and cools the mix, and this hopper
Cool the supplied mix while stirring.
And a cooling cylinder for producing frozen desserts
Hopper cooler and cooling cylinder
Discharge from cylinder cooler and compressor during frozen dessert production
High-temperature refrigerant was condensed in a water-cooled condenser and depressurized.
After that, the cooling cycle and heating
The high-temperature refrigerant discharged from the compressor during the bacteria operation
Heating cycle where the heat is supplied to the condenser and heated, and then flows to the condenser
And a hopper cooling system
Supply of high-temperature refrigerant to the heat exchanger and cylinder cooler, respectively.
Controlling hopper hot gas valve and cylinder hot gas valve
And hopper cooler and cylinder cooling during heating cycle
Detects the temperature of the piping where the refrigerant flowing out of the vessel flows
A hot gas return sensor and a control means;
Means detected by hot gas return sensor during shutdown
If the temperature drops to the specified lower limit,
Run the compressor until it rises and turn on the cooling
Opening the hopper hot gas valve as a cycle
I do. According to the frozen dessert production apparatus of the present invention, the mixed
Hopper for storing and keeping cool, and appropriately supplied from this hopper
Frozen dessert by cooling the mix
And a hopper provided in the hopper.
Par cooler and cylinder cooling provided in the cooling cylinder
And high-temperature cooling discharged from the compressor during the production of frozen desserts
After condensing the medium with a water-cooled condenser and depressurizing,
Cooling cycle for cooling by supplying to
The high-temperature refrigerant discharged from the compressor is supplied to each cooler.
After heating, it constitutes a heating cycle to flow to the condenser
Reversible cycle type cooling device, hopper cooler and syringe
Hoppers that control the supply of high-temperature refrigerant to the cooler
ー Hot gas valve and cylinder hot gas valve and heating
Out of the hopper cooler and cylinder cooler during
Hot gas return that detects the temperature of the pipe through which the flowing refrigerant flows
Sensor and control means, the control means
The temperature detected by the hot gas return sensor during
When the temperature drops to the lower limit,
Operate the compressor and use the cooling device as a heating cycle
Because the hopper hot gas valve is opened,
Also heats the condenser with hot gas,
Can prevent freezing of cooling water in water-cooled condensers
It becomes. [0008] Thus, the cooling water of the condenser at low outside air temperature
Can prevent the destruction and damage of parts caused by freezing
That is what you can do. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below with reference to the drawings.
It will be described based on the following. FIG. 1 shows a frozen dessert manufacturing apparatus according to an embodiment of the present invention.
FIG. 2 is a partially vertical perspective view of the storage device SM, and FIG.
FIG. 3 is a refrigerant circuit diagram of the refrigerating apparatus R, and FIG.
FIG. 2 shows a block diagram of a device C. Example of frozen dessert production equipment
Set SM is soft ice cream and sherbet (shake)
It is an apparatus for manufacturing and selling frozen desserts such as
In the upper part of the main body 1, for example,
Hopper that stores the mix (frozen dessert mix)
2 are provided. This hopper 2 opens to the top
This upper opening is detachably mounted
Is releasably closed by the flexible lid member 3 to replenish the mix.
At times, the lid member 3 is removed. On the other hand, around the hopper 2, hopper cooling
The hopper cooler 4 is wound around the
The mix in the upper 2 is kept cool. In addition, hopper 2
A hopper stirrer called an impeller (stirring)
Device) 5 is provided, and an induction motor provided below is provided.
Is driven by a stirring motor 6 (shown in FIG. 3)
You. Furthermore, a predetermined height on the side wall of the hopper 2
Position is a mix level sensor consisting of a pair of conductive poles.
The mix level sensor
7 conducts and a predetermined amount (mix level) in the hopper 2
Mix above the height of the bell sensor 7)
The state of detection, that is, High or a predetermined amount or less.
A lower state, that is, whether or not the state is Low is detected. So
The mix level sensor 7 has a control device to be described later.
C (FIG. 3). The stirring motor 6 is provided to the control device C.
Therefore, the control device C has a stirring mode.
Agitation motor adjustment switch 5 for adjusting the rotation of the rotor 6
6 (FIG. 3) are connected. This stirring motor adjustment switch
Switch 56 is operated by an up-down key provided on the substrate.
Therefore, in the present embodiment, there are seven stages (“1” (weak),
Adjustable to "2", ... "6", "7" (strong)
And the mix level sensor 7 exceeds a predetermined amount.
(High) The number of rotations of the stirring motor 6 can be selected.
It has been. With the above arrangement, the control device C is
The level sensor 7 is higher than a predetermined amount (High).
Is detected, the stirring motor adjustment switch 5
6 controls the operation of the stirring motor 6. That is,
If the setting switch 56 is set to “1”, an example
For example, the stirring motor 6 is turned on for 0.3 seconds, and then 1.
Intermittent luck for a relatively long OFF time that repeats OFF for 4 seconds
Rolling is performed. As a result, the stirring motor 6 rotates at a low speed.
Will do. Then, the adjustment switch 56 is set to "2".
In this case, the stirring motor 6 is turned on for 0.5 seconds,
OFF is repeated for the next 1.2 seconds. Set value increases
Each time the ON time of the stirring motor 6 increases,
The time is reduced, and the rotation speed of the stirring motor 6 rises.
Good. Then, when the adjustment switch 56 is at the set value “7”,
Means that the stirring motor 6 is turned on for 1.5 seconds, and
Repeat OFF for 2 seconds. This state is when the stirring motor 6
Be faster. As described above, a predetermined amount of mix
If there is a rotation, the rotation speed of the stirring motor 6 is appropriately adjusted.
So that the stirring power can be adjusted in multiple stages.
To match the type of mix and the rise in outside air temperature.
To stir the mix in the best condition
become. Further, the controller C controls the mix level cell.
When the sensor 7 detects that it is equal to or less than a predetermined amount (Low).
In this case, regardless of the setting of the stirring motor adjustment switch 56,
Then, the stirring motor 6 is turned on for 0.2 lines, and then 2.
Intermittent luck for a relatively long OFF time that repeats OFF for 0 seconds
Rolling is performed. Thereby, the rotation of the stirring motor 6 becomes
It will be the lowest speed. Furthermore, the mix in the hopper 2 is
If it is below (Low), the heat sterilization process described later
Do not do it, that is, stop the flow of hot gas
It is configured as follows. The hopper stirrer 5 is provided inside the hopper 2.
The mixture is stirred so that it does not freeze,
The mix is put in the hopper 2 in a predetermined amount or more,
Refrigerant gas flowing in the cooler 4 in the reverse direction of cooling, that is, hot
Rotary drive even when hopper 2 is heated and sterilized by gas
Is done. On the other hand, in FIG.
Mixer appropriately supplied from the hopper 2 by the
The confectionery is manufactured by rotating and stirring the soup with a beater 10.
A cooling cylinder around which a cylinder cooler 11
Is attached. Beater 10 is a beater motor
12, via a drive transmission belt, a speed reducer 13 and a rotating shaft
Rotated. The manufactured frozen dessert is the freezer door on the front
14 by operating the extraction lever 15
The plunger 16 moves up and down to move through an extraction path (not shown).
Being opened and the beater 10 being driven to rotate
Is taken out. Next, with reference to FIG.
The cooling device R will be described. In FIG. 2, R is a reversible cold
Device. Hereinafter, the cooling device R will be described.
18 is a compressor, and 19 is a discharge from the compressor 18.
When the discharged refrigerant forms a cooling cycle (solid arrow)
And the case of constituting a heating cycle (broken arrow)
A four-way valve that reverses the direction, 20 is a water-cooled condenser
is there. The condenser 20 is connected to an outer refrigerant pipe 57 and an inner refrigerant pipe 57.
And a water pipe 58 on the side.
It has a structure in which a heavy pipe is spirally wound. Refrigerant piping
Refrigerant flowing through the inside 57 flows through the water passage pipe 5 through the water saving valve 63.
8 to exchange heat with cooling water (tap water) constantly flowing
Will be rejected. That is, the four-way valve 19 is
In the case where the refrigerant is configured, the refrigerant distribution of the condenser 20 is performed.
The high temperature and high pressure discharged from the compressor 18
Gas refrigerant flows in through the check valve 21, where it condenses and liquefies.
And becomes a liquid refrigerant. This liquid refrigerant is a dry core (dryer) 23.
When it comes out of the check valve 22 via
Linda cooling valve 24, capillary tube for cooling cylinder
The pressure is reduced through 25 and flows into the cylinder cooler 11 to
This evaporates and cools the cooling cylinder 8. The other is a hopper
-Cooling valve 26, Capillary tube 2 for hopper at the previous stage
The pressure is reduced through 7 and flows into the hopper cooler 4 where
After evaporating and cooling the hopper 2, the subsequent capillary
It flows out through the tube 28. Then, the cooling cylinder 8 and the hopper 2
The cooled refrigerant is joined by the accumulator 30
After that, the cooling operation returns to the compressor 18 through the four-way valve 19.
(Sales state) (solid arrow flow). In addition, before
In order to detect the temperature of the hopper 2,
When the hopper sensor 32 (FIG. 3) is attached,
In addition, the cooling cylinder 8 has the temperature of the cooling cylinder 8.
More substantially detects the temperature of the mix in the cooling cylinder 8
Cylinder sensor 31 (FIG. 3)
ing. In addition, the cylinder cooler 11
Cylinder cooler sensor 3 for detecting the surface temperature of cooling device 11
8 (FIG. 3) are attached. This cylinder cooler
The sensor 38 performs a subcooling protection operation of the cooling cylinder 8 described later.
Used to perform By the way, in this cooling operation, good quality
Set the cooling cylinder 8 and the hopper 2 at a predetermined temperature to obtain frozen dessert.
It needs to be kept cool every time. Also, depending on the type of mix
Depending on the flavor of each mix,
The cooling cylinder 8 and the hopper 2 can be optionally set by the user.
It is also necessary to keep the temperature cool. Therefore, the cooling syringe
The cylinder sensor 31 for detecting the temperature of the cylinder 8;
This cylinder sensor 31 allows the balance as described in detail later.
ON (open) the cylinder cooling valve 24 by temperature control,
Turns on the presser 18 to perform cooling, and the cylinder cooling valve
Hopper cooling valve 26 when 24 is OFF (closed)
Open / close the compressor and turn on / off the compressor 18
You. In other words, the control is such that the cooling of the cooling cylinder 8 has priority.
Under the condition that the cylinder cooling valve 24 is OFF,
The hopper cooling valve 26 is turned on. The sale was made under the cooling operation described above.
Later, when the store is closed, sterilize the mix by heating.
Will be. In this case, the cooling device R is set to the cooling cycle.
To the heating cycle operation. That is, the four-way valve 1
9 is operated to flow the refrigerant as indicated by the dotted arrow. Then,
The high-temperature, high-pressure refrigerant gas from the compressor 18,
Togus is a two-hander via the four-way valve 19 and the accumulator 30
One is directly into the cylinder cooler 11 and the other is
Flows into the hopper cooler 4 through the check valve 33,
In each case, a heat radiation effect occurs, and at a specified sterilization temperature
During this time, the cooling cylinder 8 and the hopper 2 are heated. Each of the liquefied refrigerants after the heat release has a cylinder hot.
Piping via a gas valve 34 and a hopper hot gas valve 35
After joining at 65, the refrigerant in the condenser 20 passes through the check valve 40
It flows into a pipe 57, where it is separated into gas and liquid. Then cold
The medium gas flows out of the refrigerant pipe 57 of the condenser 20 and flows out of the check valve 21.
Connected in parallel through a refrigerant pipe 59 connected to the downstream side of
Reverse solenoid valve (open / close valve) 36 and reverse capillary
It flows into the tube 37. And the reverse solenoid valve 3
6 or the refrigerant gas passing through the reverse capillary tube 37
Is connected via a branch pipe 60 connected to the upstream side of the check valve 21.
And returns to the compressor 18 via the four-way valve 19.
Form an icicle. The cylinder sensor 31 is provided for the cooling cylinder 8.
Also used for detecting the heating temperature of
So that the specified sterilization temperature is maintained for the mix
At the upper and lower set temperature values of the predetermined range
Turn on the hot gas valve 34 and compressor 18
FF control is performed. Also, the cylinder sensor 31 detects
Of the reverse solenoid valve 36 using the mixed temperature information
Close control is also performed. On the other hand, the heating control of the hopper 2
The hopper sensor 32 that detects the temperature of the
At the same set temperature value set for cylinder 8, the hopper
ON / OFF control of the gas valve 35 and the compressor 18
Is performed. Further, the cylinder sensor 31 is heated and killed.
Transfer to cooling after bacteria, and maintain a certain low temperature until the next day
Maintain the condition, that is, the cooling temperature (about + 8 ° C to + 10 ° C)
As will be described later in detail, ON and O of the compressor 18 are described.
FF control and cylinder cooling valve 24, hopper cooling valve 26
ON / OFF control. Furthermore, the compressor 18
In order to suppress high load operation, the cylinder sensor 31
The reverse solenoid valve 36 is controlled to open and close at the
It is. 44 is an electrical box, and 45 is a freezer
The drain receiver 64 provided corresponding to the lower part of the
This is a water distribution pipe for the drain receiver 45. In addition, 55
A hydrant, a hopper 2 and a cooling cylinder during mix washing
8 is used to supply water. Furthermore, 43 is
This is a pass valve, which also prevents the compressor 18 from overloading.
Play a role. In FIG. 3, the control device C is connected to the electrical box 4
4 on a substrate housed in
Computer (control means) 46
The microcomputer 46 has the cylinder set.
Sensor 31, hopper sensor 32, cylinder cooler sensor
38 outputs are input. Also a microcomputer
Heat is dissipated to 46 by the cylinder cooler 11 and the hopper cooler 4
FIG. 1 shows a pipe 65 in which the liquefied refrigerant after the merging flows.
To detect the temperature of the returning hot gas.
The output of the hot gas return sensor 62 is input. The output of the microcomputer 46 is
The compressor motor 18M of the compressor 18
Motor 12, stirrer motor 6, cylinder cooling valve 24,
Cylinder hot gas valve 34, hopper cooling valve 26,
Per hot gas valve 35, four-way valve 19, reverse solenoid valve 3
6. The bypass valve 43 is connected. In this figure, reference numeral 47 denotes a compressor.
Current sensor (C
T) and 48 are power supplies for detecting the current supplied to the beater motor 12.
Flow sensor (CT), and both outputs are
Computer 46. 51 is an extraction switch.
And when it is opened and closed by the operation of the extraction lever 15
In both cases, the contact output is input to the microcomputer 46.
Have been. The reference numeral 49 designates the cooling setting of the frozen dessert at "1".
(Weak), “2” (medium), “3” (strong)
Cooling setting volume for 53, the beater motor current
Of the threshold value (set value) is, for example, in the range of 2.3A to 3.3A.
Is a threshold setting volume for setting
Both outputs are input to the microcomputer 46.
ing. Further, 52 is a microcomputer 46
Key input circuit including various switches for commanding operation
These cooling setting volume 49, key input circuit
52, a threshold setting volume 53 is a board of the control device C
Mounted on top. Furthermore, microcomputer
To perform various display operations such as alarms on the output of
LED display 54 is also connected. A reference numeral 61 designates the cooling setting of the frozen dessert.
Controlling the cooling operation by adjusting the constant volume 49
The equilibrium temperature control mode (first operation mode)
Manifold for controlling cooling by arbitrarily setting the cooling set temperature
Selective switching of dual mode (second operation mode)
Switch for mounting on the board
You. 70 selects the manual mode with the changeover switch 61.
Temperature setting switch to set the cooling temperature when selected
Reference numeral 71 denotes a defrost described later in the defrost step.
A display changeover switch for changing the display of the playing card DL.
All are provided on a substrate. Next, FIG. 4 shows an upper front portion of the frozen dessert manufacturing apparatus SM.
2 shows a control panel 50 provided in the control panel. This
The key input circuit 52
Operation switch SW1 and sterilization switch SW constituting
2, cleaning switch SW3, defrost switch SW4,
The stop switch SW5 and C constituting the LED display 54
LL, cooling lamp FL, defrost lamp DL, etc.
Is established. With the above configuration, referring to FIGS.
The operation of the frozen dessert manufacturing apparatus SM will be described. Frozen dessert production equipment SM
Is started, the timing charts of FIGS.
Cooling operation (cooling process, defrosting process)
Heat sterilization operation / cooling operation (sterilization heating process, sterilization maintenance
Process, cool-down process, cold-hold process)
Run. First, the balance is set by the changeover switch 61.
Cooling control when switched to temperature control mode
Will be explained. Here, the cooling setting volume 49 is set.
It is assumed that the cooling setting of frozen dessert is currently set to “1”
I do. First, referring to the flowchart of FIG.
The cooling operation will now be described. The key input circuit 52
When the cooling operation switch SW1 provided is operated,
After resetting, the microcomputer 46
In step S1, the cooling flag is set to "1".
Or reset to “0”. At the start of operation (pull-down), the cooling
Assuming that the resetting has been performed, in step S2
Based on the output of the cylinder sensor 31, the cooling cylinder 8
Is the cooling end temperature (described in FIG. 8).
Is the OFF point temperature) + 0.5 degree cooling ON point temperature
Judge whether it is more than degree. And the temperature of the mix is high
If so, the process proceeds to step S3, and the measurement timer (my
Computer 46 has its function).
In step S4, the current mix temperature is set to a temperature t seconds ago.
And the cooling flag is set in step S5.
A cooling operation is performed (Step S6). In this cooling operation, the microcomputer 4
6 executes the equilibrium temperature control described below. That is,
The microcomputer 46 operates the compressor 18 (compressor).
Motor 18M), and the four-way valve 19
Cycle (de-energized). And the cylinder cooling valve 24
ON (open), hopper cooling valve 26 OFF (closed),
Linda hot gas valve 34 and hopper hot gas valve
Turn off. Also, the beater motor 12 controls the beater 1
Rotate 0. As a result, the inside of the cooling cylinder 8 is
Is cooled by the cylinder cooler 11 and
Stirred by the tap 10. Here, as described above,
Even if the cooling setting of volume 49 is set to “1”,
The computer 46 will force "3" during this pulldown.
Is what you do. In the cooling setting “3”, t seconds is 40.
Second, T ° C. (described later) is 0.1 ° C., and cooling setting “2” is t second
Is 20 seconds, T ° C is 0.1 ° C, and cooling setting “1” is t seconds.
It is assumed that T ° C becomes 0.2 ° C for 20 seconds. Next, the microcomputer 46 executes a step.
Step S1 proceeds to step S7, where the measurement timer measures
It is determined whether it is in the middle or not.
To start. Next, in step S9, the counting of the measurement timer is performed.
Judge whether or not t seconds have passed, and return if not.
You. T seconds (in this case, 4
0 second), the microcomputer 46 stops the operation.
In step S10, based on the output of the cylinder sensor 31, the current
The difference between the mix temperature and the temperature t seconds ago is T ° C (in this case,
0.1 ° C) or less, if not, step
Returning to S3, the measurement timer is cleared, and
Steps S4 to S6 are executed. Thereafter, this operation is repeated to
Cool the mix while stirring. Where Mick
As the cooling progresses, the temperature of the
Approaching the freezing point inherent to the liquid
The descent gradually slows down and becomes equilibrium. So
Then, the temperature drop for 40 seconds (t seconds) (current
The difference between the temperature and the temperature before t seconds) is 0.1 ° C (T ° C) or less.
Then, the process proceeds from step S10 to step S11. In step S11, the microcomputer
The motor 46 is a beater motor based on the output of the current sensor 48.
12 is the current flowing above the threshold or not?
to decide. Cooled while being stirred in the cooling cylinder 8
The mix has a certain hardness when it comes to frozen desserts for sale.
Will have. And of frozen dessert (soft cream)
The hardness increases the load on the beater 10 that is stirring it.
Therefore, the current supplied to the beater motor 12 increases. This threshold is suitable for the type of mix.
Set as appropriate. That is, a mix that becomes a relatively soft product
In the case of, lower the threshold value and make the product relatively hard
In the case of a mix, it is better to set a high threshold. So
Then, the current flowing through the beater motor 12 exceeds the threshold
If so, the process proceeds to step S15. Then, in step S15, the current mix
Is set to the above-mentioned cooling end temperature, and step S
In step S16, the cooling flag is reset, and
At 17, cooling is stopped. That is, in this cooling stop, the microcomputer
The motor 46 turns off the cylinder cooling valve 24, and
The upper cooling valve 26 is turned on. This allows the cooling syringe
The cooling of the hopper 8 is stopped and the hopper cooling valve 26 is turned on.
This time, the hopper 2 is cooled.
The pull-down is now completed, so the microcomputer
The computer 46 sets the cooling setting with the volume 49
Return to “1”. Then, the microcomputer 46 operates
Returning to step S1, the cooling flag is reset here.
The process proceeds to step S2 and the cylinder cell
Based on the output of the sensor 31, the current mix temperature
The temperature rises above the recycle ON point temperature (cooling end temperature + 0.5 ° C)
Is determined. If not, step S16
And repeat the above. In addition, microcomputer
The hopper 46 is a hopper based on the output of the hopper sensor 32.
If the temperature of 2 is also cooled below the predetermined temperature,
The hopper cooling valve 26 is also turned off, and in this case,
The compressor 18 also stops. In the embodiment, the hopper
The cooling valve 26 is turned on at + 10 ° C. and turned off at + 8 ° C. The temperature of the mix (chilled dessert) rises and
When the temperature exceeds the N point temperature, the microcomputer 46
The process proceeds from step S2 to step S3, and thereafter the cooling system is similarly operated.
This is to start cooling the cylinder 8. Like this
Then, frozen dessert is manufactured. Cooling lamp FL during the production of frozen dessert
Flashes when the production is completed.
available. Here, the outside where the frozen dessert manufacturing apparatus SM is installed is set.
If cooling failure occurs due to high air temperature, etc.,
Even though the temperature detected by the cylinder sensor 31 is low,
The degree of hardness of the mix in the solder 8 can be sold as a product
Will not rise. In such a situation, the beater 10
The load on the beater motor 12
The current rises slowly (or does not rise).
The threshold will not be exceeded. The microcomputer 46 proceeds to step S1.
0, the process proceeds to step S11.
When 1, the current supplied to the beater motor 12 exceeds the threshold.
If not, proceed to step S12 to set the current cooling setting.
Is determined to be “3”. At this time, the cooling setting is “1”
Therefore, the microcomputer 46 determines in step S13
To shift the cooling setting by one step (that is, in this case,
(Shift to "2"). Then, from step S13 to step S3
To clear the measurement timer and
Steps S4 to S6 are executed. After that, repeat this
The mix in the cooling cylinder 8 is cooled while further stirring.
Go. Then, this time, the 2 set in the cooling setting “2”
Temperature drop during 0 seconds (t seconds) (current mix temperature and
difference from the temperature before t seconds) is 0.1 ° C. (T ° C.) or less.
Then, the process proceeds from step S10 to step S11. At step S11, the microcomputer
The computer 46 determines the beater based on the output of the current sensor 48.
The current supplied to the motor 12 is equal to or greater than the threshold value.
It is determined whether or not. And the energization of the beater motor 12 is still
Assuming that the current does not exceed the threshold,
The computer 46 proceeds to step S12 and performs the current cooling.
It is determined whether the setting is “3”. At this time, the cooling setting
Since it is "2", the microcomputer 46
Proceeding to S13, the cooling setting is shifted by one step (that is, in this case,
To "3"). Then, from step S13 to step S3
To clear the measurement timer and
Steps S4 to S6 are executed. After that, repeat this
The mix in the cooling cylinder 8 is cooled while further stirring.
Go. Then, this time, the cooling setting "3"
Temperature drop during 0 seconds (t seconds) (current mix temperature and
difference from the temperature before t seconds) is 0.1 ° C. (T ° C.) or less.
Then, the process proceeds from step S10 to step S11. In step S11, the microcomputer
The computer 46 determines the beater based on the output of the current sensor 48.
The current supplied to the motor 12 is equal to or greater than the threshold value.
It is determined whether or not. And the energization of the beater motor 12 is still
If the current does not exceed the threshold,
The data 46 proceeds to step S12 and the current cooling setting is
It is determined whether it is "3". In this case, set the cooling setting to “3”
Since the shift has been performed, the microcomputer 46
Proceeding to step S18, check lamp C of LED display 54
L blinks. Then, the process proceeds to step S17 to
The cooling of the cooling cylinder 8 is stopped as described above. It should be noted that normal operation can be restored by resuming cooling after that.
That is, the current flowing through the beater motor 12 exceeds the threshold value.
When it rises, the microcomputer 46 turns on the inspection lamp CL.
It turns off the light. Next, referring to the flowchart of FIG.
Switch to manual mode with the changeover switch 61
The cooling control in the case of replacement is described. Manu
When the mode is switched to the full mode, the temperature setting switch 7
The cooling set temperature is arbitrarily set by 0. Enter the key
When the cooling operation switch SW1 of the power circuit 52 is operated,
After resetting everything, the microcomputer 46
In step S20 of step 6, the cooling flag is set to "1".
It is determined whether it is reset or reset to “0”. At the start of operation (pull-down), the cooling
Assuming that the resetting has been performed, step S21
And the cooling cylinder 8 based on the output of the cylinder sensor 31.
The current mix temperature in the chiller is slightly higher than the cooling set temperature
It is determined whether the temperature is higher than the rejection ON point temperature. The cooling ON point temperature in this case will be described later.
The cooling OFF point temperature can be set by the temperature setting switch 70
The specified width above and below the cooling set temperature set in
To configure the hysteresis of the microcomputer
46 is set. That is, the above cooling ON point temperature
And the cooling OFF point temperature is also set by the temperature setting switch 70
As a result, it can be set arbitrarily. However
In this case, the cooling set temperature is equal to the cooling OFF point temperature.
You may. In that case, the cooling O
The FF point temperature is set arbitrarily. Then, the temperature of the mix is assumed to be high.
In step S22, the cooling flag is set and the cooling operation is started.
The operation is executed (step S23). That is, microcontroller
The pewter 46 is a compressor 18 (compressor motor
18M), and the four-way valve 19 operates as the cooling cycle.
(De-energized). Then, the cylinder cooling valve 24 is turned on.
(Open), hopper cooling valve 26 OFF (closed), cylinder
Turn off hot gas valve 34 and hopper hot gas valve
And In addition, the beater 10 is rotated by the beater motor 12.
Invert. As a result, as described above,
The mix is cooled by cylinder cooler 11 and beater
Stirred by 10. Next, the microcomputer 46 executes a step.
Step S20 proceeds to step S24, where the current mix temperature
The cooling OFF point temperature is less than the cooling set temperature.
Determine whether it is below. And the temperature of the mix is high
Then, the process returns to step S23 to execute the cooling operation. Thereafter, this operation is repeated to
Cool the mix while stirring. Where Mick
The temperature of the mix decreases as the cooling progresses,
When the temperature becomes equal to or lower than the cooling OFF point temperature, step S25 is performed.
Resets the cooling-in-progress flag at step S26.
To stop cooling. That is, in this cooling stop, the microcomputer
The motor 46 turns off the cylinder cooling valve 24, and
The upper cooling valve 26 is turned on. This allows the cooling syringe
The cooling of the hopper 8 is stopped and the hopper cooling valve 26 is turned on.
This time, the hopper 2 is cooled. Then, the microcomputer 46 operates
Return to step S20, where the cooling flag is reset
Has been performed, the process proceeds to step S21, and
The current mix temperature is
It is determined whether the temperature has risen above the cooling ON point temperature. Rise
If not, the process proceeds to step S26, and thereafter, the process is repeated.
return. The microcomputer 46 is a hopper sensor
32, the temperature of the hopper 2 is also lower than a predetermined temperature.
When cooled down, the hopper cooling valve 26 is also
FF is performed, and in this case, the compressor 18 is also stopped.
I do. In the embodiment, the hopper cooling valve 26 is turned on at 10 ° C.
N, turned off at 8 ° C. The temperature of the mix (chilled dessert) rises and
When the temperature exceeds the N point temperature, the microcomputer 46
From step S21, the process proceeds to step S22.
The cooling of the cooling cylinder 8 is started. Thus, the changeover switch 61 is operated.
The microcomputer of the frozen dessert manufacturing apparatus SM
The cooling operation mode according to E.46 is set to the equilibrium temperature control mode.
Can be switched to the new mode
Experts are in manual mode, otherwise
In the balance temperature control mode, as required by the user
Operation mode can be selected and executed
Convenience is improved. Here, cooling in the cylinder cooler 11
The capacity (that is, the cooling capacity of the cooling device R) becomes excessive.
In this case, in the process of cooling the cooling cylinder 8,
The balance is easily broken and a supercooled state is apt to be caused. Also cooling
Even if the mix in the cylinder 8 runs short, the cooling system
The Linda 8 easily falls into a supercooled state, and in such a supercooled state,
The entire mix in the cooling cylinder 8 freezes and the beater 10
Of the mixture in the cooling cylinder 8 by the rotation of
High quality soft ice cream etc. in a rotating situation
Is difficult to manufacture. Then, the microcomputer 46 is as follows.
The sub-cooling protection operation of the cooling cylinder 8 described in
You. The flowchart of FIG. 7 relates to the subcooling protection operation.
Shows the control program of the microcomputer 46
I have. Here, if the cooling cylinder 8 falls into a supercooled state,
When an ice layer is formed on the inner surface of the cooling cylinder 8,
Therefore, it becomes a heat insulating layer and cools the cylinder cooler 11
Heat exchange with the mix in the cooling cylinder 8 is hindered. So
As a result, the temperature of the cylinder cooler 11 drops rapidly.
Become like The microcomputer 46 has the steps shown in FIG.
The cylinder detected by the cylinder cooler sensor 38 in step S27
The temperature of the cylinder cooler 11 is taken
The temperature is, for example, a predetermined low temperature state of -15 ° C. to -16
The time T1 until the temperature drops to ° C is integrated. Next,
In step S28, the temperature of the cylinder cooler 11 is now -16 ° C.
The time T2 until the temperature falls to -17 ° C is integrated. Change
In step S29, the temperature of the cylinder cooler 11 decreases by -1.
Integrating the time T3 from 7 ° C to -18 ° C,
In step S30, is T2 shorter than T1 (T1> T
2) Or, determine whether T3 is shorter than T2 (T2> T3).
Refuse. If T2 is equal to or greater than T1, and T2
When 3 is equal to or longer than T2, the control returns to the above-described control. Immediately
That is, the rate of temperature drop from -16 ° C to -17 ° C
Equal to or lower than the temperature drop rate from -15 ° C to -16 ° C
And temperature drop from -17 ℃ to -18 ℃
The temperature drop rate from the previous -16 ℃ to -17 ℃ and
If equal or less, no supercooling condition has occurred
Judge On the other hand, in step S30, T2 is shorter than T1.
Immediately or when T3 is shorter than T2
That is, the rate of temperature drop from -16 ° C to -17 ° C
Increased from the temperature drop rate from -15 ° C to -16 ° C
Or the rate of temperature drop from -17 ° C to -18 ° C
Increased from the previous temperature drop from -16 ° C to -17 ° C
If so, the supercooling state of the cooling cylinder 8 starts.
As a result, the temperature of the cylinder cooler 11 began to drop sharply
Then, the process proceeds to step S31. At step S31, the microcomputer 4
6 indicates whether the current cooling control mode is the manual mode
to decide. And, if it is currently in the equilibrium temperature control mode
In step S32, the process proceeds to step S32 where the cylinder cooler sensor 3
8 detects the aforementioned -18 ° C.,
(Compressor motor 18M) stopped and cylinder cooled
Close valve 24. Thereby, cooling of the cooling cylinder 8 is performed.
Stops, supercooling is prevented, and the cooling cylinder 8
Since cooling stops, the temperature detected by the cylinder sensor 31
The temperature goes to the equilibrium state, and is cooled by the aforementioned equilibrium temperature control.
The rejection end temperature will be set. Therefore,
Cooling is prevented. On the other hand, if the current mode is the manual mode,
Proceeds from step S31 to step S33,
When the cooler sensor 38 detects -18 ° C,
The temperature detected by the sensor 31 is the cooling OFF point temperature.
Set every time. Thereby, step S24 in FIG.
From step S25 to step S26,
Since the cooling of the heater 8 is stopped, the subsequent supercooling is prevented.
Will be stopped. Next, the defrosting step in FIG. 8 will be described.
I will tell. This defrosting process is performed in the cooling cylinder 8
This is executed to eliminate the so-called "fall" of
You. The frozen dessert in the cooling cylinder 8 is not sold for a long time
When the mixture is kept cool with stirring, softening progresses and
The hardness that can be provided as a product cannot be maintained. This is for example
In the case of the frozen dessert manufacturing apparatus SM of the embodiment, 10
Empirical experience that may occur if you do not extract individual frozen desserts
Has been confirmed. These 10 cooling cylinders
This is the amount that all the frozen desserts inside are taken out. The microcomputer 46 has its own function and
Based on the signal from the extraction switch 51 and the timer
And monitoring this during the cooling process.
The number of extractions in the interim period is less than 10 ("
), The defrost lamp D
L blinks at a short interval of 0.2 seconds, for example,
A warning is given to the user that a "set" has occurred. The user is involved in defrosting
"Fall" of frozen dessert is raw by flashing of Trump DL fast
You can judge that there is a risk of turning. Then, in such a case, the user must
Operate the switch SW4. Key input circuit during cooling operation
When the defrost switch SW4 of 52 is operated,
The computer 46 is connected to the cylinder hot gas valve 34
N, OFF control, cool gas with hot gas
And heat the mix to a predetermined temperature (+ 4 ° C).
You. Thereby, the frozen dessert in the cooling cylinder 8 is once melted.
Let it. The microcomputer 46 is a defrosting machine.
During the process, set the defrost lamp DL to a point at 0.5 second intervals, for example.
Switch to extinguish. And when the defrost process is over
Turn off the defrost lamp DL, and then
The computer 46 continues the cooling operation and mixes again.
Is returned to the cooling step. Here, depending on the user, the "fall"
No need to blink defrost lamp DL to warn of danger
In some cases, Because control panel 5
It is a sign given to the customer that the blinking of the lamp is performed at 0.
Elephants also get worse, and sometimes it is not good for business
It is. Therefore, if such a warning is not required, display
The changeover switch 71 is operated to switch without warning. Ma
The display switch 71 of the microcomputer 46 is operated.
If no warning has been set, the
The speed of the defrost ramp DL even if the condition
Do not flash. This gives users and customers
You can eliminate the feeling of insecurity. However,
Actually, when such conditions are satisfied, the microcomputer
The monitor 46 uses an indicator (not shown) on the board to be visible to the customer.
The warning is displayed when there is no
You. Next, the heat sterilization / cooling operation (sterilization) shown in FIG.
Heating process, sterilization holding process, cold keeping pull down process, cold keeping
Holding step) will be described. Killing the key input circuit 52
When the fungus switch SW2 is operated, there is no mix out
Under the conditions, the microcomputer 46 heat sterilizes and cools
Start driving. The microcomputer 46 has a four-way valve 19.
Switches the refrigerant circuit from the cooling cycle to the heating cycle
Change. Then, the hot gas is cooled by the cylinder as described later.
The cooling silice is supplied alternately to the cooler 11 and the hopper cooler 4.
Disinfection and temperature raising works to raise the temperature of the hopper 8 and the hopper 2
Execute the process. Cylinder cooler 11 and hopper cooler 4
Is discharged from the refrigerant pipe 5 of the condenser 20 through the pipe 65.
7, where it exchanges heat with the cooling water flowing through the water pipe 58.
After the replacement, the reverse solenoid valve 36 and the reverse capillary
The connection point of the tube 37 is reached. Here, the microcomputer
The motor 46 always closes the reverse solenoid valve 36,
Therefore, the refrigerant gas is always the reverse capillary tube 3
After the pressure is reduced at 7, the flow returns to the compressor 18. Through the reverse capillary tube 37
The reason for returning the refrigerant to the compressor 18
To prevent liquid back (suction of liquid refrigerant)
However, the heat sterilization / cooling operation is executed in such a state.
And the pressure difference between the suction side and the discharge side of the compressor 18 increases
The compressor 18 is overloaded and the compressor
Current of the motor 18M increases. Microcomputer
The compressor motor 1 according to the current sensor 47
It monitors the 8M conduction current, for example up to 5.2A
When ascended, the reverse solenoid valve 36 is opened. As a result, the cold flowing out of the condenser 20 is
The medium flows through the reverse capillary tube 37 due to the flow path resistance difference.
Instead of passing through the reverse solenoid valve 36 and the compressor 1
8, the load on the compressor 18 is light.
Is reduced. And, for example, the compressor motor 18M
When the current drops to 3.6A, the microcomputer
The data 46 executes the operation of closing the reverse solenoid valve again.
You. Here, the cooling step is switched to a sterilization and temperature raising step.
In the initial stage of the change,
Hot gas is supplied to the low-temperature cylinder cooler 11 or hopper
Heat is exchanged with the condenser 4 and rapidly condensed.
Most of the refrigerant flowing into is in a liquid state. And double pipe
In the condenser 20 having the structure, a general tank-type water in a tank is used.
Gas-liquid separation of the refrigerant is more difficult than in a cold condenser. That
Therefore, the liquid refrigerant reaching the condenser 20 is pushed out one after another.
It is easy to return to the compressor 18 and liquid back occurs.
At the same time, frost is generated on the piping on the suction side of the compressor 18.
It will be easier. Then, the microcomputer 46
The heating of the cooling cylinder 8 and the hopper 2
The process of alternating and raising the temperature in stages
Perform the work. The flowchart of FIG.
Hot gas valve 34 and hopper hot gas
Control of microcomputer 46 for control of valve 35
Shows the program. When the sterilization heating step is started, the micro
The computer 46 first sets the cylinder hot in step S34.
Open gas valve 34 (ON), hopper hot gas valve 35
Is closed (OFF). This opens the sterilization and heating process
Initially, hot gas flows only into the cylinder cooler 11.
Then, only the cooling cylinder 8 is started to be heated. Next,
In step S35, based on the output of the cylinder sensor 31,
It is determined whether the temperature of the solder 8 has reached TC. This temperature
TC is + 20 ° C. at first, + 30 ° C., +
40 ° C, + 50 ° C, + 60 ° C, and the target temperature +
The temperature is gradually updated to 72 ° C. The cooling cylinder 8 is driven by the inflow of hot gas.
Temperature reached the first TC of + 20 ° C.
Then, the microcomputer 46 proceeds to Step S36.
Then, judge whether the current TC is + 72 ℃ or not.
In step S37, TC is updated to + 30 ° C.
Proceed to step S38. In step S38, the micro
The computer 46 now closes the cylinder hot gas valve 34
(OFF), open the hopper hot gas valve 35 (O
N). As a result, only the hopper cooler 4 is
The cut gas is caused to flow, and only the hopper 2 is heated.
Next, in step S39, based on the output of the hopper sensor 32,
Next, it is determined whether or not the temperature of the hopper 2 has reached TH.
This temperature TH is initially + 30 ° C., and is +4
0 ° C, + 50 ° C, + 60 ° C, and target temperature of +7
It is gradually updated to 2 ° C. The temperature of the hopper 2 is controlled by the inflow of hot gas.
When the temperature rises and reaches the first TH of + 30 ° C,
The micro computer 46 proceeds to step S40 and
Is determined to be + 72 ° C or not.
Proceed to step S41 to update TH to + 40 ° C,
It returns to S34. Thereafter, this is repeated, and the cooling cylinder 8
When the temperature rises to + 30 ° C, heat the cooling cylinder 8
Is stopped, the hopper 2 is heated, and the temperature of the hopper 2 becomes +
When the temperature rises to 40 ° C, stop heating the hopper 2 and cool
The cylinder 8 is heated. And the temperature of the cooling cylinder 8
When the temperature rises to + 40 ° C, stop heating the cooling cylinder 8.
Then, the hopper 2 is heated, and the temperature of the hopper 2 is + 50 ° C.
When it rises, stop heating hopper 2 and cool
Heat da8. Further, the temperature of the cooling cylinder 8 is increased by +50.
When the temperature rises to ℃, the heating of the cooling cylinder 8 is stopped and
Heat par 2 and hopper 2 temperature rises to + 60 ° C
Then, the heating of the hopper 2 is stopped, and the cooling cylinder 8 is added.
heat. Then, the temperature of the cooling cylinder 8 is + 60 ° C.
When the temperature rises, stop the heating of the cooling cylinder 8 and
-2 is heated, and the temperature of the hopper 2 is the target temperature +7.
When the temperature rises to 2 ° C., steps S40 to S34
And the heating of the hopper 2 is stopped, and the cooling cylinder 8 is
Heat. By this heating, the temperature of the cooling cylinder 8 is controlled.
When the temperature rises to the target temperature of + 72 ° C.,
Then, the process proceeds to a sterilization holding step described later. As described above, the cooling cylinder 8 and the hopper 2
By increasing the temperature step by step,
At the beginning of the sterilization heating step, the refrigerant pipe 57 of the condenser 20 is
Prevents a large amount of liquid refrigerant from flowing in, thereby
It is possible to eliminate the liquid back of the compressor 18
I will be able to. In particular, heating the cooling cylinder 8 first
Since it is started, the cooling chiller of lower temperature than hopper cooler 4
There is also an advantage that the liquid refrigerant can be stored in the solder 8. Also,
First, let hopper 2 reach the target of + 72 ° C,
After that, the cooling cylinder 8 is raised to + 72 ° C.
Disadvantage that the mix in the recirculation cylinder 8 is exposed to high temperatures for a long time
To avoid deterioration of the mix in the cooling cylinder 8
become able to. The sterilizing and heating step is completed in this way,
When the bacteria holding process is started, the cylinder sensor 31 and
Based on the output of the hopper sensor 32, the microcomputer
Data 46 is the compressor 18, the cylinder hot gas valve 3
4. ON / OFF control of hopper hot gas valve 35
And both the cooling cylinder 8 and the hopper 2 are at + 69 ° C. to +72.
Satisfies the total heating time of about 40 minutes in the heating temperature range of ℃
So to hold. The process of raising sterilization and maintaining sterilization
Displayed on the sterilization monitor lamp PL of the LED display 54
It is. Here, the temperature of the frozen dessert in the cooling cylinder 8 is
Although it is about -6 ° C for soft ice cream, it is manufactured in summer.
In the case of a sherbet etc., the temperature drops to -10 ° C or less,
It will have a cool storage effect. In this way, the cooling
When the temperature of the heater 8 is low, the sterilizing and heating process described above is performed.
In the refrigerant pipe 57 of the condenser 20 in the sterilization holding process.
The temperature of the incoming refrigerant drops below zero,
Danger that the cooling water in the water pipe 58 of the compressor 20 freezes.
There is ruggedness. Freezing occurs in the water passage pipe 58.
And the water saving valve 63 and the water pipe 58 are damaged.
0 peripheral parts are damaged. Therefore, the microcomputer 46 is
Sterilization heating process in sterilization and holding operation
In this process, the anti-freezing control described below is executed. FIG.
The flowchart in this figure shows the system related to the freeze prevention control in this case.
The program of the micro computer 46 is shown. Ma
The microcomputer 46 in step S42 of FIG.
Cylinder cooler 11 detected by cut gas return sensor 62
And the temperature of the hot gas return refrigerant from the hopper cooler 4
Judge whether the temperature is below the lower limit before zero, for example, + 1 ° C.
ing. Then, the hot gas return sensor 62 detects
The hot gas return refrigerant temperature is higher than + 1 ° C
Returns to the control described above.
Proceed to step S43 to open the cylinder hot gas valve 34
Is prohibited (OFF). As a result, a low
The flow of the warm refrigerant stops. Next, in step S44,
Of the hot gas return refrigerant detected by the gas return sensor 62.
Whether the temperature has risen to the return temperature, eg + 30 ° C
Judgment is made, and if it does not rise, it returns to other control. Steps
In S44, the temperature of the hot gas return refrigerant becomes +30 or more.
Then, the process proceeds from step S44 to step S45 to
The opening of the dahot gas valve 34 is permitted (ON). Thus, the hot water flowing into the condenser 20 is
Prevents the temperature of the gas return refrigerant from falling below zero
It can be used in the sterilization heating / holding process of heat sterilization / holding operation.
Through the refrigerant flowing into the refrigerant pipe 57 of the condenser 20.
The cooling water in the water pipe 58 freezes and the water saving valve 63 and the water pipe
Inconvenience that causes destruction of 58 etc. can be avoided beforehand
Swell. Next, when the sterilization holding step is completed,
The micro computer 46 controls the refrigerant circuit by the four-way valve 19.
Switch to cooling cycle and shift to cool-down pull-down process
You. This cooling transition is also displayed on the LED display 54. [0096] Cool-down pull-down following the sterilization holding process
In the process, the conditions under which the temperature falls below the predetermined temperature within the predetermined time
Then, cooling is started. At this time, the macro computer
46 is based on the output of the compressor motor current sensor 47.
Therefore, the compressor motor current value is 5.8A or less
In the case, the cylinder cooling valve 24 and the hopper cooling valve
26 is opened. Cooling cylinder 8 and hopper 2 are both warm
Because of the high degree, the load on the compressor 18 increases,
The compressor motor current value rises to 5.8 A (first
If it reaches the upper limit, the hopper cooling valve
26 is closed. At this time, the cylinder cooling valve 24 is
It is opened naturally. Then, the hopper cooling valve 26 is opened.
, The compressor motor current gradually
If the value reaches 6.0 A (second upper limit),
Then, the hopper cooling valve 26 is also closed. Both cooling valves 24
And 26 are closed, the compressor motor power is
When the flow value drops and reaches 5.3A (lower limit) again
Means that the cylinder cooling valve 24 and the hopper cooling valve 26 are open.
Is done. After that, by repeating this,
8 and the hopper 2 are gradually cooled,
The overload of the presser 18 does not occur. And
Finally, the temperature of the cooling cylinder 8 and the hopper 2 is increased by + 8 ° C.
Cool to a temperature range of ~ 10C. Thus, at the start of the cold-holding pull-down step
Opens both cooling valves 24 and 26 to open the cooling cylinder 8
Cooling of both hoppers 2 is started, and from that state
When the motor current reaches 5.8 A, first cool the cylinder.
Close the recirculation valve 24 and the compressor motor current still
When it rises to reach 6.0 A, the hopper cooling valve 26
And close both cooling valves 24 and 26,
The overload of the presser 18 is quickly eliminated and, as a result,
The time required for the cold pull-down process can be reduced
Become like Then, the process proceeds to a cooling process,
The cylinder sensor 31 and the
Microcomputer based on the output of
The computer 46 has a compressor motor 18M and a cylinder cooling
The ON / OFF control of the valve 24 and the hopper cooling valve 26 is performed.
When the stop switch SW5 is operated, frozen dessert production is performed.
The device SM stops operating. Here, during business suspension such as the winter season,
The operation of the frozen dessert manufacturing apparatus SM is stopped while the source is turned on.
If the outside air temperature drops at night, etc.
Then, the cooling water in the water passage pipe 58 of the condenser 20 freezes.
You. Therefore, the water saving valve 63 and the water passage pipe 58
There is a risk of damage. Meanwhile, hot gas return sensor
The sensor 62 is provided at a position where the outside air temperature can be detected during a stop.
I have. Therefore, the microcomputer 46 stops the operation
The freeze prevention control of the condenser 20 is executed even during the stop. The flowchart of FIG.
Of anti-freezing control of microcomputer 46 in
Shows a program to do. Microcomputer 4
No. 6 indicates that the operation is stopped and the power is turned on.
As a matter of fact, in step S46, the hot gas return sensor 62
In this case, the outside air temperature is lower than the freezing point as the lower limit.
Higher than + 1 ° C. Then, the hot gas return sensor 62 detects
If the outside air temperature is higher than + 1 ° C,
In step S49, the stop is continued.
When the process proceeds to step S47 and the compressor 18 is started,
In both cases, the four-way valve 19 is used as a heating cycle and hopper hot
The gas valve 35 is opened. As a result, the condenser 20
Hot gas flows through the upper cooler 4 and condenses
The cooling water in the water pipe 58 of the vessel 20 is heated. Next, the microcomputer 46 executes a step.
Temperature detected by the hot gas return sensor 62 in step S48
(In this case the temperature of the hot gas return refrigerant) is the return temperature
It is determined whether the temperature has risen to, for example, + 30 ° C. or more.
If not, the heating operation of the condenser 20 is continued.
You. Then, in step S48, the temperature of the hot gas return refrigerant
When the temperature reaches +30 or more, the condenser 20 is
It is determined that heating has been completed, and the process proceeds to step S49, where operation is performed.
To stop. Due to the heating operation during the stop, the low outside air temperature
Of the water passage pipe 58 and the water saving valve 63 of the condenser 20 at the time of
Cracks and breakage can be avoided beforehand. The numerical values of each temperature and the like shown in the examples are
Function and performance of frozen dessert production equipment
Shall be determined appropriately according to As described above, according to the frozen dessert production apparatus of the present invention,
A hopper that stores and cools the mix, and this hopper
-Cool while stirring the mix supplied as appropriate
Cooling chiller and hopper
The hopper cooler provided and the cooling cylinder provided
Cylinder cooler and the compressor
The discharged high-temperature refrigerant is condensed in a water-cooled condenser and decompressed.
After that, cooling cycle and heating to supply to each cooler and cool
The high-temperature refrigerant discharged from the compressor during the sterilization operation is
Heating cycle after supplying to the cooler and heating, then flowing to the condenser
Reversible cycle cooling device and hopper
Supply of high-temperature refrigerant to the cooler and cylinder cooler respectively
Controlling hopper hot gas valve and cylinder hot gas
Valve and hopper cooler and cylinder cooling during heating cycle
To detect the temperature of the pipe through which the refrigerant flowing out
Hot gas return sensor and control means.
The control means detects the hot gas return sensor during shutdown.
If the temperature falls to the specified lower limit, the specified return temperature
Operate the compressor until it rises and heat the cooling device
Open hopper hot gas valve as cycle
So even during shutdown the hot gas heats the condenser,
Prevents cooling water from freezing in water-cooled condensers at low outside temperatures
It is possible to do. Thus, the cooling water of the condenser at the time of low outside air temperature
Can prevent the destruction and damage of parts caused by freezing
That is what you can do.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially longitudinal perspective view of a frozen dessert production apparatus according to an embodiment of the present invention. FIG. 2 is a refrigerant circuit diagram of a cooling device of the frozen dessert production device of FIG. FIG. 3 is a block diagram of a control device of the frozen dessert manufacturing apparatus of FIG. 1; FIG. 4 is a front view of a control panel of the frozen dessert manufacturing apparatus of FIG. 1; FIG. 5 is a flowchart showing a program of a microcomputer of the control device of FIG. 3; FIG. 6 is a flowchart showing a program of a microcomputer of the control device. FIG. 7 is a flowchart showing a program of a microcomputer of the control device. FIG. 8 is a timing chart illustrating a cooling operation of the frozen dessert manufacturing apparatus of FIG. 1; FIG. 9 is a flowchart showing a program of a microcomputer of the control device. FIG. 10 is a flowchart showing a program of a microcomputer of the control device. FIG. 11 is a timing chart illustrating a heat sterilization / cooling operation of the frozen dessert manufacturing apparatus of FIG. 1; FIG. 12 is a flowchart showing a program of a microcomputer of the control device. [Description of Signs] 2 Hopper 4 Hopper cooler 8 Cooling cylinder 10 Beater 11 Cylinder cooler 18 Compressor 19 Four-way valve 20 Water-cooled condenser 24 Cylinder cooling valve 26 Hopper cooling valve 31 Cylinder sensor 32 Hopper sensor 34 Cylinder hot gas valve 35 Hopper hot gas valve 38 Cylinder cooler sensor 46 Microcomputer 57 Refrigerant pipe 58 Water flow pipe 61 Changeover switch 62 Hot gas return sensor 65 Pipe C Control device SM Cold confectionery manufacturing device R Cooling device

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Koichiro Ikemoto             2-5-5 Keihanhondori, Moriguchi-shi, Osaka 3             Yo Electric Co., Ltd. F-term (reference) 4B014 GB22 GP12 GT20

Claims (1)

Claims: 1. A hopper that stores and cools a mix, a cooling cylinder that manufactures frozen dessert by cooling a mix supplied as appropriate from the hopper while stirring, and a hopper provided in the hopper. A cooler, a cylinder cooler provided in the cooling cylinder, and a high-temperature refrigerant discharged from a compressor during the manufacture of frozen dessert is condensed in a water-cooled condenser, depressurized, and then supplied to each of the coolers for cooling. A reversible cycle-type cooling device comprising a cooling cycle to be performed and a heating cycle in which high-temperature refrigerant discharged from the compressor is supplied to each of the coolers during heating and sterilization operation, and is heated and then flown to the condenser. A hopper hot gas valve and a cylinder hot gas valve for controlling the supply of high-temperature refrigerant to the cooler and the cylinder cooler, respectively, A hot gas return sensor for detecting a temperature of a pipe through which a refrigerant flowing out of the hopper cooler and the cylinder cooler and merging at the time of recycling is provided, and control means, the control means comprising: If the temperature detected by the compressor drops to a predetermined lower limit, the compressor is operated until the temperature returns to a predetermined return temperature, and the hopper hot gas valve is opened with the cooling device as the heating cycle. apparatus.