JPS61177950A - Sterilizer for production unit of ice cream - Google Patents

Abstract

PURPOSE:To sterilize ice cream in a short time, by sterilizing mix in a cooling chamber by the use of a high-temperature refrigerant gas and an electric heater. CONSTITUTION:Mix such as shake, soft ice cream, etc. is quantitatively fed from the inlet 1A to the cooling chamber 1, the compressor 3 and the fan 4 are operated, the cooling solenoid valve 7 is opened, a low-temperature refrigerant gas is circulated to the evaporation pipe 9, the mix fed to the cooling chamber 1 is cooled to give ice cream. Then the fan 4 is stopped while keeping the compressor 3 in operation, the valve 7 is closed, the hot gas solenoid valve 12 is opened, a hot gas is circulated through the by-pass pipe 11 to the evaporation pipe 9, an electric current is sent to the heater 13, the mix in the cooling chamber 1 is sterilized under heating.

Description

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

(b) Conventional technology Japanese Patent Application Laid-Open No. 57-181650 discloses a refrigerant gas compressor and a container for storing and/or processing liquid food or ice cream mix, which are arranged in a heat exchange relationship. an evaporator having an outlet end connected to the suction side of the compressor, and one end connected to the refrigerant discharge side of the compressor,
In an ice cream making machine equipped with a gas compression type refrigeration unit consisting of a condenser whose other end is connected to the inlet end of the evaporator and an expansion valve interposed between the condenser and the evaporator,
A method of sterilizing a food product or ice cream mix, the method comprising: passing hot compressed refrigerant gas from the compressor to the evaporator, bypassing the condenser and expansion valve;
The high-temperature refrigerant gas is circulated from the evaporator to the compressor, and the high-temperature refrigerant gas is continued to be circulated until each part of the ice cream making machine that is in a heat exchange relationship with the evaporator reaches a desired sterilization temperature. A sterilization method is disclosed in which the refrigeration cycle is restarted by interrupting the bypass circuit and reconnecting the condenser and expansion valve to the refrigerant gas circuit.

(C) Problems to be Solved by the Invention In the prior art sterilization method, the desired sterilization temperature can be obtained by circulating high-temperature refrigerant gas, but □ In order to obtain the desired sterilization temperature with high-temperature refrigerant gas alone, Moreover, it takes a long time to reach the desired sterilization temperature after the high temperature refrigerant gas is circulated to the evaporator, resulting in a delay in restarting the normal refrigeration cycle. This shortens the time for product extraction (sales), which is not necessarily desirable for users.

In view of the above, the present invention provides a sterilization device for a frozen dessert making machine that can complete sterilization in a short time without causing any hindrance to product extraction.

B) Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a frozen dessert manufacturing machine equipped with an electric heating means for heating and sterilizing the mix in the cooling chamber and a hot gas heating means for the refrigeration system. This is a sterilizer.

(E) Effect In the above configuration, when the electric heater as the electric heating means is energized and hot gas is circulated to the evaporator connected to the cooling chamber, the cooling chamber is heated and the mix in the cooling chamber is sterilized.

(v) Embodiment The drawing shows a system diagram of a frozen dessert manufacturing machine equipped with the sterilization device of the present invention, and (1) shows an inlet (
This is a cooling room equipped with an extraction device (2) equipped with an extraction device (IA) at the rear and an extraction port (for two people) at the front. The cooling system that cools the cooling chamber (1) includes a compressor (3)
, a fan (4) is installed and an air-cooled condenser (5) is installed.
), a receiver tank (6), a cooling solenoid valve (7), an expansion valve (8) employed as a pressure reducing device, an evaporation pipe (9) wound around the outer surface of the cooling chamber (1), and an akinimulator α
1 are connected in a ring, and the hot gas heating means circulates hot gas through the evaporation pipe (9) to heat the cooling chamber (1). One end is connected to the compressor (3) and the condenser (5).
), and the other end is connected between the expansion valve (8) and the evaporation pipe (9).
) and a hot gas solenoid valve (L) connected to the bypass pipe aυ.

The electric heating means that constitutes the sterilizer of the present invention together with the hot gas heating means is constituted by a planar electric heater α-ken surrounding the evaporation pipe (9), and the electric heater 0 and the hot gas heating means is operated by the user's sterilization command, and continues to operate until the predetermined sterilization temperature is reached by a temperature sensing device I such as a thermistor that is attached to the front outer surface of the cooling chamber (1) and indirectly detects the mix temperature. . In addition, the temperature sensing device 0 usually also controls the operation of the cooling system in order to finish the mix supplied to the cooling chamber (1) into a frozen dessert with an appropriate viscosity.

Next, the present invention will be explained in detail. First, mix, which is the undiluted solution for frozen desserts such as shakes and soft-serve ice cream, is added to the inlet (I).
A) A fixed amount of K is supplied from the cooling chamber (1).

After that, when the compressor (3) and fan (4) are operated and the cooling solenoid valve (7) is opened, the low-temperature refrigerant gas is circulated through the evaporation pipe (9) and the mixture supplied to the cooling chamber (1). to cool down. The cooling operation is performed using the temperature sensing device I as described above.
The mixture in the cooling chamber (1) is controlled as appropriate by the cooling chamber (1), and the mix is finished as cold water.

Next, the sterilization operation of a mix or a mix finished into a frozen dessert, which is performed as necessary, will be explained. The compressor (3) is operated in the same way as the cooling operation, and the fan (
4) is stopped, the cooling solenoid valve (7) is closed, and the hot gas solenoid valve α2 is opened, the high temperature refrigerant gas, that is, the hot gas is circulated through the bypass pipe aυ to the evaporation pipe (9). . At the same time, electric heater αj is energized.

Accordingly, the mix in the cooling chamber (1) is heated and sterilized by the combination of hot gas and heater 03. This sterilization operation continues until the temperature sensing device (L4) detects a predetermined increased temperature, and then normal cooling operation resumes.

Here, I will disclose one experimental data for reference: -
For example, in the case of heating with hot gas alone, it took one hour to raise the mix cooled to 3°C to the sterilization temperature of 80°C, but with the hot gas and heater a3 of the present invention.
In the case of combined heating, the sterilization temperature of 80°C was reached in 40 minutes.

(g) Effects of the Invention As described above, the present invention sterilizes liquid mixes or mixes made into frozen desserts such as ice cream shakes and soft serve ice creams in a cooling chamber using high-temperature refrigerant gas, that is, hot gas, and an electric heater. Because it is used in combination, sterilization can be completed in a short time, making it possible to complete sterilization in a short period of time.
This has the advantage that interference with operation is reduced.

[Brief explanation of the drawing]

The drawing is a system configuration diagram of a frozen dessert manufacturing machine equipped with the sterilization device of the present invention. (1)...Cooling room, (3)...Compressor, (
9)...Evaporation pipe, αυ...Bypass pipe, α
R...Hot gas solenoid valve, Q3...Electric heater.

Claims (1)

[Claims] 1. Equipped with a frozen dessert extraction device on the front, a cooling chamber for cooling the supplied mix, an electric heating means and a refrigeration hot gas heating means for heating and sterilizing the mix in the cooling chamber. A sterilization device for frozen dessert making machines.