JPH02107159A - Machine for producing frozen food - Google Patents

Abstract

PURPOSE:To enable also thermal sterilization of a taking outlet in thermally sterilizing the interior of a freezer room by internally mounting an auxiliary heater for the thermal sterilization in a plunger at the front taking outlet of the freezer room. CONSTITUTION:A heater 16 is mounted in the interior of a plunger 15 provided at a frozen food taking outlet in the front of a freezer room 3 for producing a frozen food, such as soft cream. A current is also passed through the heater to sterilize the frozen food taking outlet in thermally sterilizing the interior of the freezer room 3.

Description

[Detailed description of the invention] (b) Industrial application fields The present invention relates to a frozen dessert making machine having a sterilization function.

(b) Conventional technology A mix tank that cools and stores the mix that is the raw material for frozen desserts, a freezer room that cools and stirs the mix supplied from this mix tank to make soft cream-11, etc., and from this freezer room, To take out the frozen dessert, l-'
A frozen dessert making machine basically equipped with an extraction mechanism incorporating a plunger operated by
, sterilization of mixed white meat, and 1-
It is essential to sterilize each area. As for this sterilization method, the refrigeration cycle in which the 99-stage mix tank and refrigeration cylinder are cooled by a cooler is reversed during the sterilization process, as in Jikkosho (I3-20304). In the heat pump method, which flows in the opposite direction and radiates heat in the cooler to act as heating z: 4, as in Japanese Patent Publication No. 60-46942, heat treatment 111; A bypass system has been proposed in which a bypass circuit is provided for the refrigerant, which bypasses the refrigerant and radiates heat directly to the cooler and mix tank cooler.

(c) Problems to be solved by the invention However, in either method described in (h), although the temperature of the mix tank and cooling cylinder is sufficient, the freezer door that protrudes outward from which soft serve ice cream, etc. is taken out. If the heat from the cooling cylinder is not sufficiently transmitted to the parts, sterilization may be insufficient, or if sterilization is to be carried out sufficiently, the heating temperature for the cooling cylinder must be increased, or if the temperature is not raised. It was not possible to raise the temperature of the freezer door sufficiently without taking measures such as heating it for a long time. However, this results in problems such as the increased heating level, which degrades the flavor of the mix, and the need for longer preparations before it is ready for sale, making it impossible to respond quickly.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and provide a frozen dessert making machine with a small sterilization device that can reliably sterilize the portion from which frozen desserts are taken out and that can be done in a short time.

(d) Means for Solving the Problems The frozen dessert making machine according to the present invention has a plunger inside the freezer door which is moved up and down when taking out the frozen dessert made from the mix in the freezer room. An auxiliary heater is provided that is energized in parallel during heat sterilization, and the heat generated by this auxiliary heater and the heat transferred from the freezer room can
The plunger and the sliding portion of the plunger are heat sterilized.

(E) Action When the low-temperature refrigerant from the compressor and condenser is cooled by flowing into the cooler placed around the mix tank and freezer room, and heat sterilization is required, the refrigeration cycle Either reverse operation or switch the bypass refrigerant circuit to allow high-temperature compressed refrigerant to flow to the cooler. Then, the cooler becomes a radiator and the mix tank and freezer room are heated. Further, in parallel with this, the auxiliary heater inside the plunger is energized and generates heat. Therefore, this plunger receives both the heat from the auxiliary heater and the heat transmitted from the freezer compartment, and the temperature rapidly rises to a heating temperature sufficient for sterilization. Therefore, the plunger and its sliding path are sufficiently sterilized by heating, thereby preventing the invasion of germs from the outside and preventing the proliferation of germs, thereby keeping the plunger sanitary. or,
Since the freezer door itself is also supplementally heated, the amount of heat taken from the freezer compartment is reduced, so the temperature gradient throughout the freezer compartment is gentle, and the temperature is more or less uniform, so the heat applied to the mix inside is reduced. This eliminates unevenness in the effects and avoids deterioration of the mix.

(F) Example Hereinafter, an example of the present invention will be described based on the drawings.A frozen dessert manufacturing machine A for manufacturing frozen desserts such as soft serve ice cream shown in FIG. It has a mix tank 2 that stores a mix, and a freezer chamber 3 that stirs the mix appropriately supplied from the mix tank 2 with an internal stirrer (not shown) to produce frozen desserts such as soft serve ice cream. However, freezer room 3 is normal.
It is an integrated cylindrical cylinder. 4 is a motor that rotates the agitator, and pulley 5. It is transmitted via the belt 7 and pulley 8 to the rotating shaft 9 of the stirrer. By the way, a cooling pipe 10 for cooling the mix tank is wound around the mix tank 2, and a freezer compartment 3 is also wound around the mix tank 2.
A cooling pipe 11 for cooling the freezer chamber is also wrapped around the . As is well known, these cooling pipes lO1 and cooling pipes 11 are connected to a compressor, a condenser, a chia pillar tube, etc. in the apparatus main body l, although not shown, to constitute a refrigeration cycle. Reference numeral 12 denotes a freezer door that closes the front end opening of the cylinder chamber 3, and inside thereof there is a plunger that slides up and down by operating the lever 13 and communicates the frozen dessert outlet 14 at the lower part with the freezer chamber 3. 15 is provided, and this plunger 15 controls the extraction of soft serve ice cream and the like. The gist of the invention is that an auxiliary heater 16 is installed within this plunger 15.

That is, as shown in FIG. 2, this plunger 15 moves downward within the sliding path 17 formed in the freezer door 12, and when it is on standby for sales, it closes the communication path 18 with the freezer chamber 3. This will be opened at the time of sale. As shown in FIG. 3, the plunger 15 has a hollow cylindrical shape with a bottom, and is made up of a lower metal case part 15' made of aluminum or the like that easily conducts heat, and an upper resin case part 15''. 16 is an auxiliary heater arranged inside this plunger 15, and this auxiliary heater 16 is made of a cylindrical winding frame 19 made of silicon.
A heating element 20 such as a nichrome wire is wound around the heating element 20, and lead wires 21 are connected to the heating element 20 through temperature fuses 22. The space is filled with silicone 23 to fix the position of the auxiliary heater 16 and to secure it, and to obtain heat conductivity. Further, the resin case portion 15'' above it is filled with a resin such as phenol 24 to prevent the silicone 23 from absorbing moisture.A semiconductor heater such as a POSISTOR may be used as an auxiliary heater.Next, , the entire electric circuit that combines the auxiliary heater 16 and the cooling control circuit as described above will be explained based on FIG. 4. In the same figure, 25 (C3liI) and 26 (
C5W2) is a switch that switches to the R side during cooling operation and to the P side during heat sterilization.
A cooling freezer thermostat 27 (TII
CI) is inserted and closed on the L side until cooling reaches a predetermined temperature, and then opens. Further, a cooling solenoid valve 28 (CV) and a fan motor 29 (FM) are connected in parallel to this thermostat 27. Then, via this thermostat 27 and switch 26, the compressor 30 ((:M) and the stirrer motor 31 ([1M)
are connected in parallel. On the other hand, the P side of the switch 25 is connected to a riser that opens and closes when the mix tank 2 and the freezer chamber 3 are heated and sterilized by the heat pump method or the bypass method described above. Warm freezer/thermostat 32 (TI
IPI) is connected, and the R side is equipped with a 3:1 solenoid valve for temperature increase, such as a four-way valve that completely reverses the refrigeration cycle during heat sterilization, and a switching valve that bypasses high-temperature refrigerant to the cooler.
(IIV) is connected, and an auxiliary heater 16 (I+) is connected in parallel thereto. The compressor 30 and the stirrer motor 3] are also energized via the temperature increasing thermostat 32 and the switch 26 on the 1]-C side.

Next, the operation in the above configuration will be explained. When cooling the mix tank 2 and freezer chamber 3, switch 25 and switch 26 are operated to the R side. If the freezer chamber 3 is not sufficiently cooled and the contact point of the cooling freezer thermostat 27 is on the C-L side, the compressor 30 and the stirrer motor 31 are energized. On the other hand, the cooling Tf1 magnetic valve 28 and the fan motor 29 also operate at the same time. As a result, the cooling operation progresses and the freezer compartment 3
When it is cooled to a predetermined temperature, the cooling freezer thermostat 27 is opened and all electricity is cut off and stopped.

Then, as the cooling operation is stopped, the temperature inside the freezer 3 rises, and the thermostat 27 switches to C-L again.
When switched to the side, it returns to the beginning and starts cooling again. As described above, in this cycle, cooling and stopping are repeated by turning ON and OFF the cooling freezer/thermostat 27. Here, before selling, the mix and the mix tank containing it 2. When further sterilizing and heating the inside of the freezer door 12 through which the freezer chamber 3 flows, the switches 25 and 26 are respectively switched to the P side. Then, if the temperature of the freezer chamber 3 is not sufficiently raised and the temperature raising freezer/thermostat 1 32 is closed to the C-11 side, the compression 8; 430 and the stirrer motor 31 are
Switch 25, this 51', mixed thermostat 32,
Then, the current is activated via the 1)-C side of the switch 26, but the cooling solenoid valve 28 and the fan motor 29 are stopped.
I'm going to do it. On the other hand, by closing the switch 25 on the CP side and closing the temperature raising thermostand 32 on the CU side, the temperature raising solenoid valve 33 and the auxiliary heater 16 are energized. As a result, the solenoid valve 3:3 is opened, and the refrigerant is transferred to the mix tank 2 as a hollow gas and the cooling pipe 10 of the freezer chamber 3. I
Flow to +C and heat. In particular, in the freezer door 12 section, in addition to the action of being heated by heat transfer from the freezer chamber 3 where a high-temperature liquid medium such as hot gas flows through the cooling pipe 11 and is heated, the white of the freezer door 12 is The temperature will be raised by the auxiliary heater 16 thrown in, and it will be heated by the heat from both sides. Therefore, compared to the conventional method where a part of the freezer door was heated only by heat transfer from the freezer compartment, the temperature of the freezer door part was raised to a temperature sufficient for sterilization in a short time.
2, and the inner surface of the plunger 5 and its sliding path 17 can be heated and sterilized for 1 minute. Moreover, since a large amount of heat is not taken from the freezer compartment 3 by the freezer door 12, the temperature of the freezer compartment 3 can also be raised uniformly. In this way, the temperature in the freezer chamber 3 and in the product removal [1] progresses. Eventually, as the temperature rises, the temperature rise thermostat 32 operates and opens between C-11 and the temperature becomes 0.
FFL, everything stops. Then, the heating operation stops.I-
As a result, the temperature in freezer chamber 3 decreases and rises at t1.
When the λ thermostat 32 is switched again to the C-11 side, it returns to the beginning and performs the operations described in A-1 to start raising the temperature.

As shown in 1- below, in this cycle, the temperature is repeatedly raised and stopped by turning the temperature raising thermostat 32 ON and OFF. It is also possible to use a large auxiliary heater to increase its calorific value and raise the temperature of the freezer chamber by itself, so that almost no heat transfer from the freezer chamber is required. .

(1~) Effects of the Invention According to the present invention as in 1-, the freezer room +'+f
An auxiliary heater is installed in the plunger that is located inside the freezer door and is operated under the plunger when taking out frozen desserts. When heating and sterilizing the freezer room, the plunger and its sliding path can be heated to the sterilization temperature in a short time. Even with less heat, the temperature of the freezer door can be raised sufficiently, so the heating temperature of the freezer compartment side can be lowered by that amount, and the overall temperature can be raised economically. Furthermore, since the amount of heat transfer acid from the freezer chamber is reduced, there is almost no temperature unevenness in the freezer chamber, resulting in a uniform temperature rise, which has great effects, such as avoiding deterioration of the mix inside.

[Brief explanation of drawings]

Figure 1 is a simplified cross-sectional view of the inside of the frozen dessert IIO making machine, Figure 2 is a side view of the freezer door in front of the freezer compartment, Figure 3 is a cross-sectional view of the plunger, and Figure 4 is a cross-sectional view of the frozen dessert making machine. The entire unit that performs cooling control and heat sterilization
This is a city air circuit diagram. 2...Mix tank, 3...Freezer room, 12
...Freezer door, 15...Plunger, 16
...Auxiliary heater, 17...Suri J road. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] It has a freezer room that cools and stirs the mix supplied from the mix tank to produce frozen desserts such as soft serve ice cream, and a plan that can be slid up and down is installed inside the freezer door located at the front opening of the freezer room. In a frozen dessert manufacturing machine capable of taking out frozen desserts using a jar, an auxiliary heater is inserted into the plunger to heat and sterilize the plunger and the sliding parts of the plunger by applying electricity in parallel with heating and sterilizing the freezer chamber. A frozen dessert making machine characterized by: