DE3144036A1 - "MACHINE FOR PRODUCING ICE CREAM WITH DEVICE FOR THE AUTOMATIC CONTROL OF THE HARDNESS DEGREE OF THE MIXTURE" - Google Patents

Description

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31U036

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Applicants: Genesio BRAVO, Francesco BRAVO, Giuseppe BRAVO MONTECCHIO MACGIORE (Vicenza), Italy

"Machine for the production of ice cream with a device for automatic control of the degree of hardness of the mixture"

DESCRIPTION

It is known that in a Maschi.no for ice cream production there is a need to

to control the degree of hardness of the mixture after reaching the desired consistency to adjust the cold delivery automatically.

Since the degree of hardness of the mixture depends closely on its temperature, it has already been suggested to use within to arrange a thermostat of the mixing chamber, which stops the operation of the refrigeration group as soon as it detects a predetermined temperature.

Tin such a control system has proven to be proved insufficient, as it only provides approximate information about the actual degree of hardness of the mixture. This arises because the thermostat is arranged in a stationary manner on a wall of the mixing chamber and is therefore influenced by the outside temperature and also because it is caused by the agitated mixture is only coated. It has also already been suggested that the section modulus / u fuohl.cn, which is used by the The hardening mixture is applied to the motor shaft by the mixer rotating in the mixing chamber will. Such a device is described in Italian patent specification 659 061, for example.

This device is reasonably satisfactory, but it depends very much on the effectiveness of the mixer.

The object of the invention is to create such a device that is operationally safe at the same time and is economical to manufacture.

This is according to the invention with a self-acting

3H4036

term control device of the degree of hardness of the mixture achieved in an ice cream making machine, which is characterized in that from the shaft of the Mixer a thermostat probe that rotates with this in the mixing chamber extends radially, the effective connected to the refrigeration group of the machine.

The structural and effective characteristics the invention and its advantages over the prior art emerge more closely from the following Description of an exemplary embodiment with reference to the drawing, the only figure of which shows device according to the invention in section.

In the mixing chamber 10 of an ice making machine, the shaft 11 of a mixer is rotatably mounted, this shaft being firmly connected to a drive shaft 12 located outside the mixing chamber. According to the invention, a thermostat probe 13 that rotates with the mixer shaft 11 extends from the mixer shaft 11 from, which in the operation of dor Sp <; i soo i sm t sohunq umqebeii is. The thermostat probe 13 thus senses the temperature of the mixture and transforms it into a voltage, which via a line 14 the refrigeration group controls the machine in such a way that its operation is interrupted as soon as a predetermined temperature is reached is detected. The line 1Λ is within the Probe and the drive shaft guided and over a pair of sliding contacts 15, 16 and a line 17, in the

Control circuit 19 of the refrigeration group 20 connected. A signal is taken from line 17, which is an indicator 18 of the temperature of the mixture controls.

The thermostat probe thus performs a circular movement and sweeps a middle zone of the mixing chamber, so that it feels a temperature that is essentially the mean temperature of the mixture is equivalent to. It goes without saying that several probes in different positions on the mixer or on its shaft can be attached, their temperature recordings averaged to be converted into the control signal. The probe or probes can also be used in incorporated into the blades of the mixer.

Practical tests have confirmed the absolute functionality of the device according to the invention, whose costs only slightly influence the total costs.

Claims (3)

3U4036 PATENTANWÄLTE TISCHER · KERN & BREHM TISCHER · KERN & BREHM Albert-Rosshaupter-Strasse 65 · 0 8000 Munich 70 Representatives before the European Patent Office Approved representatives at the European Patentami Your reference. Our reference. Our Ref. Bravo-6944 H. TISCHER Dipl.-Ing. W. KERN Dlpl.-Ing. H. P. ΒΠΕΗΜ Dlpl.-Chem., Dr. phll. nat. Albert-Rosshouptor-Strasae D 8000 Munich 70 Telephone (089) 7605520 Telex 05-212284 patad Telegrams Core Patent Munich Date Date November 5, 1981 Applicants: Genesio BRAVO, Francesco BRAVO, Giuseppe BRAVO MONTECCHIO MAGGIORE (Vicenza), Italy "Machine for the production of Ice cream with device for automatic control of the degree of hardness of the mixture "', PATENT CLAIMS 1. machine for. Ice cream production with a mixing chamber in which a mixer turns and with a Device for automatic control of the degree of hardness of the mixture, characterized in that this Device consisting of a radially protruding from the mixer shaft (11), with this in the mixing chamber (10) rotating thermostat probe (13), which is effective with a control circuit (19) for the refrigeration group (20) is connected. 2. Machine according to claim 1, characterized in that the thermostat probe (L3) has an inside the probe and the mixer shaft (11, 12) guided line (14) and sliding contacts (15, 16) to the control circuit (19) is connected. 3. Machine according to claim 2, characterized in that a temperature indicator is attached to the line (14) (18) is connected.