JPH0510055B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a frozen dessert manufacturing apparatus for manufacturing frozen desserts such as ice cream shakes and soft ice creams.

(B) Prior Art Generally, one of the most important points to consider when designing a frozen dessert manufacturing device is the operational control of the cooling system that cools the cooling chamber. This is important for finishing the mix supplied to the cooling chamber into a frozen dessert base with appropriate hardness (viscosity).

As an example of a temperature detection type operation control device that has been widely adopted in the past, the control device disclosed in Japanese Utility Model Application Publication No. 53-121199 has an extraction port formed in the front part and a raw material inlet port in the rear part. In view of the general structure of the freezing compartment, there is a thermostat that senses the temperature of the freezing compartment near the outlet and controls the compressor motor of the refrigeration system, and a thermostat that controls the temperature of the freezing compartment near the raw material inlet. A rear thermostat for sensing and controlling the compressor motor is provided in parallel, and the front thermostat is configured to stop the compressor motor and the rear thermostat to restart it.

It is stated that such conventional equipment is effective for continuous sales because it can quickly respond to replenishment of raw materials and resume cooling operation, but it is effective for intermittent sales because the response to replenishment of raw materials is quick.
This has led to the disadvantage that the frozen desserts near the outlet at the front of the freezer compartment are cooled more than necessary.

(c) Problems to be Solved by the Invention The present invention solves the above-mentioned conventional drawbacks, and by independently cooling the front and rear parts of the cooling chamber, it is possible to produce frozen confectionery of uniform hardness at all times. The purpose is to provide quality services and improve quality.

(d) Means for Solving the Problems In order to achieve the above object, the present invention includes a cooling chamber having a frozen dessert extraction device at the front and an inlet for raw liquid at the rear, an electric compressor, a condenser, A front cooling system configured by annularly connecting a pressure reducing device and an evaporator connected to the front of the cooling chamber, an electric compressor,
A rear cooling system is constructed by connecting a condenser, a pressure reducing device, an evaporator, etc. connected to the rear part of the cooling chamber in an annular manner, and directly or indirectly detects the frozen dessert temperature at the front part of the cooling chamber to A frozen dessert manufacturing apparatus comprising: a front temperature detection device that controls the operation of a cooling system; and a rear temperature detection device that directly or indirectly detects the temperature of the frozen dessert at the rear of the cooling chamber to control the operation of the rear cooling system. be.

(e) Operation In the above configuration, the mix supplied from the rear inlet of the cooling chamber is cooled and stirred to be finished into a frozen dessert base. At this time, the cooling chamber is cooled independently by the cooling system and the rear cooling system, whereby the frozen confectionery base at the front of the cooling chamber close to the extraction port and the frozen confectionery base at the rear of the cooling chamber close to the mix inlet are cooled. This finishes the base with approximately uniform hardness (viscosity).

(F) Embodiment An embodiment of the present invention will be described below based on the drawings. FIG. 1 shows a diagram of the cooling system of the present invention, including a front compressor 30, a front air-cooled condenser 31, and a double-tube front cooling system in which water passes through an inner tube and refrigerant passes through an outer tube (not shown in detail). A front cooling system in which a condenser 32, a front receiver tank 33, a front cooling electromagnetic valve 34, a front expansion valve 35 employed as a pressure reducing device, a front evaporation pipe 36, and a front accumulator 37 are connected in an annular manner; A rear compressor 38, a rear air-cooled condenser 39, and a rear water-cooled condenser 4 having the same configuration as the front water-cooled condenser 32.
0, rear receiver tank 41, rear cooling solenoid valve 42, rear expansion valve 43 adopted as a pressure reducing device,
Rear evaporation pipe 44 and rear accumulator 4
5 are connected in a ring to form a rear cooling system. Note that the capacitor may be either air-cooled or water-cooled.

Of these, the front evaporation pipe 30 of the front cooling system is wound around the front outer circumference of the cooling chamber 3 equipped with the extractor 4 on the front, and the rear evaporation pipe 44 of the rear cooling system is wound around the front outer circumference of the cooling chamber 3 equipped with the extractor 4 on the front side. By wrapping around the outer circumference of the rear part, the front cooling system can independently cool the front part of the cooling compartment 3, and the rear cooling system can independently cool the rear part of the cooling compartment 3. It becomes possible. In the embodiment, the winding area of the rear evaporator pipe 44 is set to be approximately twice the winding area of the front evaporator pipe 36, but this is done in view of the capacities of the front compressor 30 and the rear compressor 38. The proportions are determined and are not necessarily limited to the ratios of the embodiments.Furthermore, the rear evaporation pipe 44 is not limited to a branched configuration, but may be a wound configuration of a single pipe. The present invention is further not limited to the pipe winding method, but extends to those that constitute a front evaporation region and a rear evaporation region.

The system also includes a front fan 46 that air-cools both the front air-cooled condenser 31 and the front water-cooled condenser 32 as a related device of the front cooling system, and responds to the condensing pressure when the pressure reaches a predetermined high pressure. A front water-saving valve 47 that opens is provided, and the rear cooling system similarly includes a rear fan 48 and a rear water-saving valve 49 that air-cool both the rear air-cooled condenser 39 and the rear water-cooled condenser 40. According to this configuration, the water-cooled condensers 32 and 40 can fully expect that the refrigerant passing through the outer tubes will be cooled by the fans 46 and 48 even when water is not flowing through the inner tubes, which is extremely Become efficient. Furthermore, the configuration of the front bypass pipe 50 and front hot gas solenoid valve 51 added to the front cooling system, and the configuration of the rear bypass pipe 52 and rear hot gas solenoid valve 53 added to the rear cooling system are based on the ice crystal described later. It is something that acts to create.

Thus, the cooling operation of the front cooling system is independently controlled based on the temperature sensing operation of the front temperature detection element 54 using a thermistor, and the rear cooling system is independently controlled based on the temperature sensing operation of the front temperature detection element 55 using a thermistor. The cooling operation is independently controlled based on the temperature operation, and the front thermistor 54 is placed at the front end of the cooling chamber 3 near the extractor 4, and the rear thermistor 55 is connected to a mix supply source such as a mix tank. It is arranged at the rear end of the connected mix supply pipe 14 in the cooling chamber 3 near the inlet 14A of the cooling chamber 3.
The present invention employs a direct temperature detection method in which the front thermistor 54 and the rear thermistor 55 are placed inside the cooling chamber 3.
It is also possible to adopt an indirect temperature sensing method that is installed on the outside wall of the building.

Next, the structure of the extractor 4 attached to the front of the cooler 3 will be described in detail based on FIG. A resin cover 81 that closes the front surface of the cooling chamber 3 has a cylindrical vertical hole 82 that is open at both ends, and a cylindrical horizontal hole 8 that extends toward the cooling chamber 3 from approximately the middle of the vertical hole 82 and has an open end.
3 is formed. At the opening edge of this side hole 83 on the side of the cooling chamber 3, a bearing plate 8 is provided with an outlet 84 formed at the lower part.
5 is screwed to the bearing plate 85, and the bearing plate 85 slidably supports a shaft 87 extending rearward from an umbrella-shaped valve 86. Further, a coil spring 88 is arranged between the bearing plate 85 and the valve 86 so as to surround the shaft 87.
This spring 88 normally presses the valve 86 against a step 89 formed in the middle part of the horizontal hole 83.
acts to close the side hole 83. Although the valve 86 is mainly made of stainless steel, the portion pressed against the stepped portion 89 is made of silicon material to improve sealing performance.

On the other hand, the mechanism for moving the valve 86 rearward against the spring force and opening the horizontal hole 83 has a sliding mechanism in which the rear end is in contact with the tip of the valve 86 and the front end is inserted through the cover 81 and protrudes forward. operating rod 9
0, a lever 92 whose lower part is rotatably connected to the front part of the actuating rod 90 to reciprocate the actuating rod 90, and a lever 92 having a rotation fulcrum 91 connected to the cover 81 at the upper part thereof; The solenoid device 94 has a plunger 94A connected to an operating pin 93 perpendicular to the upper rear surface of the solenoid device 92, and a return spring 178 that returns the solenoid device 92 to its normal state. According to this configuration, the valve 86 is automatically opened and closed based on the operation of the solenoid 94, and the lever 9
It can also be opened and closed by manually operating 2.

In addition, the bottom opening of the vertical hole 82 is an extraction port 95.
It is used as a mixing chamber 95 designated as A, and the mixing chamber 9
A stirring blade 97 in which a large number of through holes 96 are formed is arranged at 5 . This stirring blade 97 is connected to the lower part of a rotating shaft 99 that extends upward through a slide bearing 98 press-fitted into the upper part of the vertical hole 82 . Further, the rotating shaft 99 is connected to a flexible cable 101 passing within the protective tube 100, and rotation is transmitted by connecting the end of this cable 101 to a motor (not shown). Note that a cylindrical bearing 103 that is screwed onto the rear surface of the cover 81 and projects inward of the cooling chamber 3 supports the front portion of the stirrer 72. The mixing chamber 95 is provided for mixing the frozen dessert base in the cooling chamber 3 and the syrup supplied to the mixing chamber 95 from another route.

The support 74 for placing the cup 73 at a position facing below the extraction port 95A of the mixing chamber 95 consists of a conical base 74A and four support plates arranged on the outer surface of the conical base 74A at intervals of 90 degrees in the vertical direction. 74B, and a fitting stepped portion 74C is formed at the corner of the support plate 74B to fit into the lower surface of the cup 73 to stably support the cup 73. A weight detection device 105 is configured in combination with this support 74. The device 105 includes a magnet 106 fixed to the lower surface of the base 74A, and a base 1
Hall element 108 attached to the back surface of 07,
Placed between the magnet 106 and the base 107, the magnet 1
06 in a predetermined position away from the Hall element 108, and further includes a base 107 to lower the support 74 with almost no horizontal movement when a load is applied to the support 74. A cylindrical lower guide 110 protruding upward from
A cylindrical upper guide 111 that protrudes downward from the lower surface of the base 74A and has a slightly larger diameter than the lower guide 110 is provided.

In such a weight detection device 105, as the support 74 descends due to the weight of the frozen dessert extracted into the cup 73, the magnet 106 approaches the Hall element 108, and according to this, the magnet 106 and the Hall element 108
The extraction operation is automatically terminated based on the output voltage of the Hall element 108 in response to changes in the magnetic force between the two.

Next, the electric circuit configuration of the present invention is shown in FIGS. 3 and 4.
This will be explained based on the diagram. 112 is a power switch, 1
13 is an operation switch having a cooling contact 113A and a preparation contact 113B; 16 is a mix supply solenoid valve connected to the mix supply pipe 14;
A switch 17A that opens when a predetermined amount of mix is supplied to the switch 17A is connected in series. 127 is a cooling control circuit that collectively controls the front compressor 30, the rear compressor 38, the front cooling solenoid valve 34, the rear cooling solenoid valve 42, the front hot gas solenoid valve 51, and the rear hot gas solenoid valve 54.

As shown in detail in FIG. 4, the cooling control circuit includes a front cooling system control circuit 128 that controls the operation of the above-mentioned front cooling system, and a rear cooling system control circuit 129 that controls the operation of the rear cooling system.
and a hot gas control circuit 130 for making ice crystals, of which the front cooling system control circuit 128 and the rear cooling system control circuit 129 have the same configuration except that the set temperature is different.

The specific circuit configurations of these will be explained below.
First, in the front cooling system control circuit 128, 131 is a bridge circuit composed of the above-mentioned front thermistor 54, resistors 132, 133, 134, and 135, and a variable resistor 136, and 137 is a bridge circuit that changes the resistance value of the thermistor 54. An amplifier 138 amplifies the unbalanced voltage generated in the bridge by the positive input terminal 138.
A first comparator 1 connected to A and having the output of amplifier 137 connected to negative input terminal 138B;
41 connects the output of the amplifier 137 to the positive input terminal 14
1A and the midpoint of the resistors 140 and 142 is connected to the negative input terminal 141B, and the output of the first comparator 138 is connected to the first transistor 14 through the diode 143.
The output of the second comparator 141 is connected between the base of the first transistor 144 and the collector of the second transistor 145 via the diode 146.
connected between the bases. 147 is a third transistor connected via dividing resistors 148 and 149 connected in series between the second transistor 145 and ground.
This is a transistor.

On the other hand, in the rear cooling system control circuit 129, the internal configuration of the temperature detection circuit 150 to which the rear thermistor 55 is connected is the same as that of the front cooling system control circuit 128 described above, so a description thereof will be omitted. However, the difference between the two is that the rear cooling system control circuit 129 has a slightly higher temperature setting than the front cooling system control circuit 128.

Further, 151 is an AND circuit that inputs the output taken out from the collector of the third transistor 147 and the output taken out from the rear temperature detection circuit 150, and 152 inputs the collector output of the third transistor 147, and its inverted output. AND circuit 153
154 is an inverter that inputs the output of the rear temperature detection circuit 150 and inputs its inverted output to the AND circuit 153. 155 uses the output of the AND circuit 153 as a set input, and the output of the AND circuit 151 is connected to the diode 156. A flip-flop 158 receives the reset input via the output of the inverter 152 and the flip-flop 15.
5, an AND circuit 159 inputs the output of the inverter 154 and the flip-flop 155;
160 is an inverter that receives the output of the flip-flop 155;
61 is a time constant circuit composed of a resistor 161A and a capacitor 161B, 162 is an AND circuit to which the inverted output of the inverter 160 and the output of the time constant circuit 161 are input, 163 is the output of the AND circuit 162 as a set input, and the reset terminal is connected to the ground 164. A flip-flop is connected to the flip-flop, and its output is used as the reset input of the flip-flop 155 via a diode 157. 165 is an inverter that inputs the outputs of the AND circuits 158 and 159 via diodes 166 and 167, 168 is an AND circuit that inputs the collector output of the third transistor 147 and the inverted output of the inverter 165, and 169 is the rear temperature An AND circuit inputs the output of the detection circuit 150 and the inverted output of the inverter 165. 170 is a fourth transistor that becomes conductive upon receiving the output of the AND circuit 168, and the first relay 17 is excited when the transistor 170 is turned on.
1 is connected. A fifth transistor 172 becomes conductive upon receiving the output of the AND circuit 169, and is connected to a second relay 173 that is excited when the transistor 172 is turned on. A sixth transistor 174 becomes conductive upon receiving the output of the AND circuit 158, and is connected to a third relay 175 that is excited when the transistor 174 is turned on. 1
76 is a seventh transistor that becomes conductive upon receiving the output of the AND circuit 159;
A fourth relay 177 that is energized by ON is connected.

Therefore, in FIG. 3, the front cooling solenoid valve 34
normally open contact 171 of the first relay 171 in series with
A, the normally open contact 173A of the second relay 173 is connected in series with the rear cooling solenoid valve 42, the normally open contact 175A of the third relay 175 is connected in series with the front hot gas solenoid valve 51, The normally open contact 177A of the fourth relay 177 is connected in series with the rear hot gas solenoid valve 53, and the normally open contact 1 of the first relay 171 is connected in series with the front compressor 30.
71B and a parallel circuit of normally open contact 175B of third relay 175 are connected, and a parallel circuit of normally open contact 173B of second relay 173 and normally open contact 177B of fourth relay 177 is connected in series with rear compressor .

Next, the operation of the present invention will be explained. The operation starts with supplying mix to the cooling chamber 3. When the operation switch 113 is first positioned at the preparation contact 113B and the power switch 112 is turned on, the mix supply solenoid valve 16 is opened. As a result, the mixture passes through the mixture supply pipe 14 to the rear inlet 14A.
from there to the cooling chamber 3. When a predetermined amount of mix is supplied to the cooling chamber 3, the pressure switch 17A opens and closes the mix supply solenoid valve 16, thereby ending the supply of mix.

After that, the operating switch 113 is connected to the cooling contact 11.
When switched to 3A, the cooling control circuit 27 starts cooling operation. The circuit operation at this time will be explained based on FIGS. 3 and 4. Since the temperature of the mix supplied to the cooling chamber 3 is high, the resistance values of the front thermistor 54 and the rear thermistor 55 are small.
Therefore, the positive input voltage of the amplifier 137 is high, and its output voltage is also high. This amplifier 137
The output of is connected to the minus input terminal 138B of the first comparator 138 and the plus input terminal 141A of the second comparator 141. here,
The output voltage of the amplifier 137 is preset to be higher than the fixed voltages V ₁ and V ₂ when the temperature is high, and is preset to be lower than the fixed voltages V ₁ and V ₂ when the temperature is low. This allows the first
The output voltage of the comparator 138 is "L", and the output voltage of the second comparator 141 is "H". At this time, the voltage at _V3 is pulled to "L" through the diode 143, so the first transistor 144
is OFF, and the voltage of _V4 is reverse biased in the diode 146, so the voltage of the first transistor 144 is
When it is OFF, it becomes “H” and the second transistor 1
45 is also turned off. Furthermore, the second transistor 1
Since the collector voltage of transistor 45 is "L", third transistor 147 is also turned off. Therefore, the collector voltage of the third transistor 147 becomes "H". Similarly, the output voltage of the rear temperature detection circuit 150 also becomes "H".

In response to this, the output voltage of AND circuit 151 becomes "H" and the output voltages of inverters 152 and 154 become "L". At this time, flip-flop 15
Since the output voltage "H" of the AND circuit 151 is input to the reset input of the flip-flop 155 through the diode 156, the output voltage of the flip-flop 155 is "L".
It is. Upon receiving these signals, the AND circuit 158
and the output voltage of 159 becomes "L". On the other hand, since the collector voltage of the third transistor 147 and the output voltage of the inverter 165 are both "H", the output voltage of the AND circuit 168 is "H".
Since both the output voltage of the rear temperature detection circuit 150 and the output voltage of the inverter 165 are "H", the output voltage of the AND circuit 169 is "H".
Therefore, the fourth transistor 170 and the fifth transistor 172 are turned on, the first relay 171 and the second relay 173 are energized, and the normally open contacts 171A and 171B of the first relay 171 shown in FIG.
and the normally open contacts 173A and 17 of the second relay 173
Close 3B. As a result, the front compressor 30 is operated, the front cooling solenoid valve 34 is opened, and cooling operation by the front cooling system is started, and the rear compressor 38 is operated, and the front cooling solenoid valve 42 is opened. The valve opens and cooling operation by the rear cooling system begins. At this time, the front fan 46 and the rear fan 48 also rotate to cool the front capacitors 31 and 32 and the rear capacitors 39 and 40.

By the way, the output voltage of the inverter 160 is "H" because the output voltage "L" of the flip-flop 155 is input, and the output voltage "L" of the flip-flop 155 is passed through this and the resistor 161A.
The output voltage of the AND circuit 162 inputting is "L".
becomes. Since this is connected to the set input of the flip-flop 163, the flip-flop 163 has a set input "L" and a reset input always "L", so the output voltage of the flip-flop 163 maintains the "L" condition.

As the mix supplied to the cooling chamber 3 is cooled, it gradually hardens and is finished as a frozen dessert base. As the frozen dessert base temperature decreases, the resistance values of the front thermistor 54 and the rear thermistor 55 increase. For example, if the front thermistor 54 detects a predetermined drop in temperature of the frozen dessert base, the positive input voltage of the amplifier 137 becomes low, and the output voltage of the amplifier 137 also becomes low. At this time, the output voltage of the amplifier 137 becomes lower than the fixed voltages V ₁ and V ₂ and the output voltage of the first comparator 1 becomes lower than the fixed voltages V 1 and V 2 .
38 output voltage is "H", second comparator 14
The output voltage of 1 becomes "L". This results in _V3
The voltage at V4 is unaffected by the reverse bias of the diode 143, and the voltage at _V4 is the voltage at the second comparator 14.
1, a potential difference is generated between the base and emitter of the second transistor 145, and the second transistor 145 is turned on, and the first transistor 144 is also turned on. Furthermore, since the collector voltage of the second transistor 145 is "H", the third transistor 147 is also turned on. Therefore, the collector voltage of the third transistor 147 becomes "L".

On the other hand, if the rear thermistor 55 does not detect the predetermined temperature drop of the frozen dessert base and the output voltage of the rear temperature detection circuit 150 is maintained at "H", the output voltage of the AND circuit 151 is " The output voltage of the inverter 152 becomes "H", and the output voltage of the inverter 154 becomes "L".
As a result, the output voltage of the AND circuit 153 becomes "L".
Since both the set and reset input voltages of the flip-flop 155 become "L", the output of the flip-flop 155 remains "L". In response to this, AND circuits 158 and 159
The output voltage becomes "L". On the other hand, AND circuit 1
68, since the collector voltage of the third transistor 147 is "L" and the output voltage of the inverter 165 is "H", its output voltage is "L", and the AND circuit 169 outputs the output of the rear temperature detection circuit 150 and the inverter 165. Since both voltages are "H", the output voltage continues to be "H". Therefore, the fourth transistor 170 is turned off, and the first relay 171 is turned off.
is de-energized and the normally open contact 1 of the relay 171
71A and 171B are opened. By this,
When the front compressor 30 is stopped, the front cooling solenoid valve 34 is closed, and the operation of the front cooling system is stopped. On the other hand, the fifth transistor 172
The normally open contact 173A of the second relay 173 continues to be ON, and the second relay 173 continues to be in the excited state.
The operation of the rear compressor 38 and the rear cooling solenoid valve 42 continues through the terminals 173B and 173B, and only the rear cooling system is operated.

When the rear thermistor 55 detects a predetermined temperature drop of the frozen dessert base, the rear temperature detection circuit 1
The output voltage of 50 is also "L". Collector voltage of third transistor 147 and rear temperature detection circuit 1
When both the output voltages of the inverter 150 become "L", the output voltage of the AND circuit 151 becomes "L", and the output voltage of the inverter 152 becomes "L".
and the output voltage of 154 becomes "H". As a result, the output voltage of the AND circuit 153 becomes "H",
The set input voltage of the flip-flop 155 becomes "H", the reset input voltage becomes "L", and the output voltage of the flip-flop 155 changes to "H". As a result, the output voltages of the AND circuits 158 and 159 become "H", and the output voltage of the AND circuit 169 becomes "L". Therefore, the fifth transistor 1
72 is turned off, the excitation of the second relay 173 is released, and the normally open contacts 173A and 1 of the second relay 173 are turned off.
73B is opened. This closes the rear cooling solenoid valve 42 and stops the operation of the rear cooling system.

As mentioned above, when the initial cooling operation by the front cooling system and the rear cooling system both stop,
The output voltages of AND circuits 158 and 159 both become "H". Therefore, the sixth transistor 174
The seventh transistor 176 is turned on, the third relay 175 and the fourth relay 177 are excited, and the normally open contacts 175A and 175B of the third relay 175 are turned on.
and the normally open contacts 177A and 1 of the fourth relay 177.
77B is closed. As a result, the front compressor 34 is operated, and the front hot gas solenoid valve 51
opens to start heating operation of the front part of the cooling chamber 3, which circulates hot gas to the front evaporation pipe 36 through the bypass pipe 50. At the same time, the rear compressor 38 is operated, and the rear hot gas solenoid valve 53 opens to circulate the hot gas to the front evaporation pipe 36. 52 to circulate the hot gas to the rear evaporation pipe 44 to start heating the rear part of the cooling chamber 3.

Such a heating operation of the cooling chamber 3 thaws the minute ice crystals contained in the once hardened frozen dessert base, thereby separating it into fat and water.
By recooling in this separated state, the ice crystals can grow larger in a shorter time, and the ice crystals are effective in eliminating the stickiness of the final frozen dessert.
The heating operation for making ice crystals can be solved by performing it once during bulldown, with some exceptions. In other words, once ice crystals of a certain size are made, even if new ice crystals are supplied, the ice crystals already present in the cooling chamber 3 will act as a stimulus and the ice crystals will easily grow. be.

By the way, when the output voltage of the flip-flop 155 changes to "H", the inverter 160
Since the output voltage of the AND circuit 162 is "L", the output voltage of the flip-flop 163 is "L".
Since both the set and reset input voltages of the flip-flop 163 are "L", the output voltage of the flip-flop 163 is "L".
hold.

When the cooling chamber 3 is heated and the temperature of the frozen dessert base increases and the front thermistor 54 detects a predetermined increased temperature of the frozen dessert base, the front thermistor 54
The resistance value becomes smaller, and finally the third
The collector voltage of transistor 147 is “H” again.
Changes to At this time, if the output voltage of the rear temperature detection circuit 150 is maintained at "L", the output voltage of the AND circuit 151 is "L", and the inverter 1
The output voltage of the inverter 52 is also "L", and the output voltage of the inverter 154 is "H". In addition, the inverter 152
The output voltage of the AND circuit 153 which receives the outputs of the AND circuit 154 becomes "H". At this time, since both the set and reset input voltages of the flip-flop 155 are "L", the output voltage of the flip-flop 155 remains "H". Therefore, the output voltage of the AND circuit 158 becomes "L", and the sixth transistor 17
4 is turned OFF, the excitation of the third relay 175 is released, and the normally open contacts 175A and 1 of the third relay 175 are turned off.
75B is opened. As a result, the front compressor 30 is stopped and the front hot gas electromagnetic valve 51 is closed to stop the heating operation of the front part of the cooling chamber 3, and only the heating operation of the rear part of the cooling chamber 3 continues. Note that the output voltage of the AND circuit 159, which is at "H" at this time, is input to the AND circuit 168 by the inverter 165.
Since it is input through
Therefore, the fourth transistor 170 is not turned on, and the cooling operation of the front cooling system is not started at this point.

When the rear thermistor 55 detects the predetermined temperature rise of the frozen dessert base, the resistance value of the rear thermistor 55 becomes small, and the output voltage of the rear temperature detection circuit 150 changes to "H" again as described above. Then, the output voltage of the AND circuit 159 becomes "L", turning off the seventh transistor 176 and turning off the fourth transistor.
When the relay 177 is de-energized, the relay 17
No. 7 normally open contacts 177A and 177B open.
As a result, the rear hot gas solenoid valve 53 closes and the heating operation of the rear part of the cooling chamber 3 is stopped. In addition,
The rear compressor 38 continues to operate as described below.

In this way, the condition that the collector voltage of the third transistor 147 and the output voltage of the rear temperature detection circuit 150 are both "H" at which the heating operation of both the front and rear parts of the cooling chamber 3 is stopped is at the time when the cooling operation is started. Under the same conditions, the fourth transistor 170 and the fifth transistor 172 are turned on, and the first relay 1 is turned on.
71 and the second relay 173 are energized, and the normally open contacts 171A and 171B of the first relay 171 and the normally open contacts 173A and 173B of the second relay 173 are energized.
Close the circuit. As a result, the front compressor 3
0 is operated, the front cooling solenoid valve 34 is opened and the cooling operation of the front cooling system is restarted, and the rear compressor 38 is continuously operated via the normally open contact 173B, and the rear cooling solenoid valve 42 is opened. After that, the cooling operation of the rear cooling system is resumed.

Here, when the output voltage of the flip-flop 155 changes from "H" to "L", the inverter 16
0's output voltage changes from "L" to "H", but the input voltage of the AND circuit 162 through the resistor 161A slowly changes from "H" to "L" due to the discharge time of the time constant circuit 161. change. At this time, the output voltage of the AND circuit 162 becomes "H" instantly.
As a result, the set input voltage of the flip-flop 163 becomes "H", the reset input voltage becomes "L", and the output voltage of the flip-flop 163 becomes "H". Once this flip-flop 163
When the output voltage of the flip-flop 163 becomes "H", the reset input voltage of the flip-flop 163 always remains "L", so the output voltage "H" of the flip-flop 163 does not change thereafter. Furthermore, since the output of flip-flop 163 is connected to the reset input of flip-flop 155 through diode 157, the output voltage of flip-flop 155 also remains at "L" and does not change.

Therefore, from now on, AND circuits 158 and 15
The sixth and seventh transistors 174 and 176 are turned on because the output voltage of the transistor 9 never becomes "H".
Therefore, the front and rear hot gas solenoid valves 5
1 and 53 do not operate and heating operation is not performed.
Also, since the input voltage of one of the AND circuits 168 and 169 remains "H", the AND circuit 16
8 and 169, the output voltage is determined by the input state of the other. That is, the AND circuit 168 changes its output depending on the state of the output voltage based on the detection operation of the front thermistor 54, and the AND circuit 169 changes its output depending on the state of the output voltage based on the detection operation of the rear thermistor 55. As a result, the front cooling system control circuit 128 independently controls the cooling operation of the front cooling system based on the detection operation of the front thermistor 54, thereby maintaining the frozen dessert base in the front of the cooling chamber 3 at an ideal hardness. The rear cooling system control circuit 129 maintains the rear thermistor 5 in the
Based on the detection operation 5, the cooling operation of the rear cooling system is independently controlled, thereby maintaining the frozen dessert base at the rear of the cooling chamber 3 in an ideal hardness state.

The operation of extracting the final frozen dessert by mixing syrup with the frozen dessert base in the cooling chamber 3 that has been finished as described above will be explained below. When an extraction command is issued, the solenoid 94 is energized, the plunger 94A is attracted, and the operating pin 93 is moved to the lever 92.
pull forward. Then, the lever 92 rotates about the fulcrum 91 and moves the operating rod 90 rearward. This backward movement of the operating rod 90 causes the valve 86 to
is pressed rearward against the spring 88 to open the horizontal hole 83. As a result, the frozen dessert base in the cooling chamber 3 is moved from the outlet 84 to the side hole 8 by the stirrer 72.
3 and sent to the mixing chamber 95. At the same time, syrup is fed into the mixing chamber 95.

The frozen dessert base and syrup that are continuously supplied to the mixing chamber 95 are mixed at high speed by the stirring blade 97 and finished as a frozen dessert.
It is extracted continuously from cup 73. Cup 7
When the weight detection device 105 detects that a predetermined amount of frozen dessert has been extracted in step 3, the supply of syrup is stopped, the excitation to the solenoid 94 is released, and the lever 92 is returned to its normal position by the action of the return spring 178. , the operating rod 90 following this also returns to the forward position. As a result, the valve 86 is connected to the coil spring 8.
8 is pressed against the stepped portion 89 of the horizontal hole 83, the horizontal hole 83 is closed, and the supply of the frozen dessert base is also stopped, and furthermore, the stirring blade 97 is stopped and the extraction operation of the frozen dessert is completed.

In the extraction operation as described above, when the frozen dessert base in the cooling chamber 3 is delivered to the mixing chamber 95, the pressure switch 17A is closed and the mix supply solenoid valve 16 is opened to supply mix to the cooling chamber 3.

In such a mix replenishment operation, the control circuit 127 of the present invention operates effectively. That is, the rear thermistor 55 quickly detects the temperature increase due to mix replenishment, and the rear cooling system control circuit 12
9, the cooling operation of the rear cooling system is started, and a frozen confectionery base having an ideal hardness can be quickly finished.

The frozen dessert manufacturing apparatus of the embodiment described above has a mixing chamber 95 in the extractor 4, and an example of a frozen dessert made by mixing the frozen dessert base and syrup in the cooling chamber 3 has been described here. An extraction structure may be adopted in which the frozen dessert base in 3 is directly extracted from the extractor 4. Furthermore, Mitsu is placed in the cooling room 3 using the natural fall method.
It is also possible to have a structure that supplies the

(G) Effects of the Invention As described above, the present invention independently configures the front cooling system that cools the front part of the cooling chamber and the rear cooling system that cools the rear part of the cooling chamber, and improves the efficiency of the front cooling system. The cooling operation is independently controlled by a front temperature detection device that detects the temperature of frozen confectionery at the front of the cooling chamber, and the cooling operation of the rear cooling system is controlled by a rear temperature detection device that detects the temperature of frozen confectionery at the rear of the cooling chamber. Since it is independently controlled, in the case where the extractor is configured at the front of the cooling chamber and the mix inlet is configured at the rear of the cooling chamber, the mixture supplied to the cooling chamber can be controlled approximately throughout the entire area of the cooling chamber. It is possible to finish the frozen dessert base with a uniform hardness, and when replenishing new mixes to the rear part of the cooling chamber by intermittent or continuous frozen dessert extraction, the frozen dessert base in the front area of the cooling chamber can be made to the ideal hardness. This has an extremely excellent advantage of being able to finish the frozen dessert base in the rear area of the cooling chamber to an ideal hardness in a short time while controlling the condition.

[Brief explanation of the drawing]

Fig. 1 is a cooling system diagram of the frozen dessert manufacturing apparatus of the present invention, Fig. 2 is a side sectional view showing the internal structure of the extractor,
FIG. 3 is a schematic electrical circuit diagram of the present invention, and FIG. 4 is an electrical circuit diagram of the main part of the present invention. 3...Cooling chamber, 4...Extractor, 14A...Inlet, 30...Front compressor, 31...Front air-cooled condenser, 32...Front water-cooled condenser, 3
5...Front expansion valve, 36...Front evaporation pipe, 3
8... Rear compressor, 39... Rear air-cooled condenser, 40... Rear water-cooled condenser, 43...
Rear expansion valve, 44... Rear evaporation pipe, 54...
Front thermistor, 55... Rear thermistor, 95
A...extraction port, 128...front cooling system control circuit, 129...rear cooling system control circuit.

Claims (1)

[Claims] 1 A cooling chamber having a frozen dessert extraction device at the front and a mix inlet at the rear, an electric compressor, a condenser, a pressure reducing device, an evaporator, etc. connected to the front of the cooling chamber are connected in an annular manner. A front cooling system configured, a rear cooling system configured by connecting an electric compressor, a condenser, a pressure reducing device, an evaporator, etc. connected to the rear of the cooling chamber in an annular manner, and a frozen dessert temperature at the front of the cooling chamber. a front temperature detection device that directly or indirectly detects the temperature of the frozen dessert at the rear of the cooling chamber to control the operation of the front cooling system; and a front temperature detection device that directly or indirectly detects the temperature of the frozen dessert at the rear of the cooling chamber to control the operation of the rear cooling system. A frozen dessert manufacturing device characterized by being equipped with a rear temperature detection device.