De'longhi Appliances S.r.l.

De' Longhi Appliances S.r.l. Con Unico Socio

Paolo Evangelisti

Giuseppe De'Longhi

Giuseppe De' Longhi

Davide Bonotto

Nicola Piovan

Nicola Nicoletti

Alberto Acciari

Antonio Panciera

Andrea Zottarel

Enrico Zaratin

Floriano Franzon

Stefano Quaresimin

Emanuele Marcato

Eros Sartori

Embodiments described here concern a method to control a direct current motor powered by an alternating supply voltage, which provides to detect the instant of the zero-crossing of the supply voltage and to selectively activate a switch device to power the motor by the positive half-waves of the supply voltage in order to make it rotate in one sense, and by the negative half-waves in order to make it rotate in the opposite sense. The disclosure also concerns a control circuit for the motor.

Control method and circuit for a direct current motor for an infusion unit of a machine for preparing coffee beverages

An automatic machine for preparing beverages, in particular American coffee, including a unit to feed the coffee powder, a mobile infusion unit having an infusion cylinder which delimits an infusion chamber, and a hydraulic circuit configured to heat the water for the infusion and feed it to the infusion chamber, where the infusion unit has an expulsion piston slidable inside the infusion cylinder and delimiting at the lower part the infusion chamber, and a valve device provided with a valve body and a closing piston which can engage with the infusion cylinder in order to close the infusion chamber.

Machine for preparing coffee

The loose product dispenser has a container and a sensor with optical barrier for detecting the presence of loose product in the container, the sensor having a transmitter of a light beam, configured to generate the optical barrier between an entry point and an exit point of the light beam from the container, and a receiver of the light beam, the sensor further has an electronic board on which both the receiver and the transmitter are installed, and a light guide configured and arranged to transmit to the reciever the light beam collected from the exit point.

Loose product dispenser

A valve device suitable to selectively obstruct a flexible tube, includes a first body and a second body operatively associated with each other, which are mobile with respect to each other along a sliding axis, thus configuring an open operating position and a closed operating position and thus defining a passage gap configured to be passed through by the flexible tube. The invention also concerns a machine for preparing beverages which includes a valve device and a corresponding functioning method.

Valve device

The collection tray () for discharged liquid/steam of a coffee machine () comprises a primary collection compartment (), a secondary collection compartment (), an overflow () of the primary collection compartment () for discharging the liquid into the secondary collection compartment (), and at least two electrical conductors () positioned in the secondary collection compartment () and assembled on an oscillating support () for connection with two contacts () of an external electrical circuit for detecting the level of the liquid present in the secondary collection compartment ().

Collection tray for discharged liquid/steam of a coffee machine that incorporates said collection tray

The coffee machine () comprises a brewing cylinder (), a movement system of the brewing cylinder () comprising a nut screw () engaged with a motorised screw (), and elastic means () compensating the mechanical backlash between the threads of the screw () and of the nut screw ().

Coffee machine with improved movement system of the brewing cylinder

A coffee machine including a controller, a boiler for heating a flow of infusion water, a movable infusion unit having an open infusion chamber connected to a dispensing line for dispensing the coffee infusion and having an ejection piston slidably supported therein in the infusion chamber, a supply line for supplying said flow of infusion water to the infusion unit, a closing piston engageable for closure of the infusion chamber. The controller can subject the infusion unit, prior to execution of the infusion process, to a first course of translational movement for closure of the infusion chamber by the closing piston, and to subject the infusion chamber and/or the ejection piston, following execution of the infusion process, to a second course of translational movement, for compression of the load of spent coffee grounds against the closing piston and for drainage of the liquid contained therein.

Coffee machine and method for preparing a cup of coffee

The production method of hot milk with or without froth, with a Venturi effect emulsifying device suitable for sending, into a mixing chamber, a flow of steam so as to aspirate, by Venturi effect, milk and air or only milk, comprises a production cycle of hot milk with froth and a production cycle of hot milk without froth being carried out by supplying an equal flow of steam of equal duration into a mixing chamber having equal volume, equal conformation and equal inlet section of the milk but a different outflow section of the milk.

Milk emulsifying device with a Venturi effect and a production method of hot milk with and without froth using the device

A milk container associated with a coffee machine includes a containment body for containing milk; a mixing unit for mixing milk with air and steam; an external dispenser of the mixed milk; and a movement mechanism for moving the external dispenser configured and disposed to subject the external dispenser to a combined movement for lifting it with respect to a resting surface and distancing it from the containment body without changing its own angular orientation.

Milk container that can be associated with a coffee machine and coffee machine having such a milk container

The device for emulsifying a milk-based beverage for coffee machines comprising, operatively associated with one another, a main steam connector () for connecting to the coffee machine (), an intake tube () for drawing milk from a milk container (), a mixing body (), a steam connector () with a reducing hole () placed between said mixing body () and said main connector (), a mixing element () and a stabilizing element () associated with the mixing body (), the main steam connector () comprising a first safety means () for the safe connection thereof to said coffee machine and second safety means () for the limited rotation of the head of the head () of the main connector () so as to direct the emulsified beverage into a container ().

Device for emulsifying a milk-based beverage for coffee machines

A coffee machine including a controller, an infusion cylinder that can be loaded with a ground coffee dose, an ejection piston slidably supported inside the infusion cylinder, a closing piston engageable in the infusion cylinder to create a closed infusion chamber for the ground coffee dose, delimited between a lateral wall of the infusion cylinder, the ejection piston and the closing piston. Electrical actuation moves the infusion cylinder between a lower travel limit stop, where the ground coffee dose is loaded, and an upper travel limit stop where the infusion process occurs, an adjuster for positioning the upper travel limit stop based on the size of the loaded ground coffee dose, so that in the position of the upper travel limit stop, the infusion chamber has a volume sufficient to contain the ground coffee dose without compressing it.

Coffee machine and relative control method

The automatic coffee machine () comprises a single infuser unit () for producing a coffee infusion, coffee infusion dispensing means () located in front of a front wall () of the machine () in a distanced position above a surface () for resting one or more cups () for collecting the coffee infusion, a hydraulic circuit () for distributing the coffee infusion to the coffee infusion dispensing means (), and valve interception means () present along said hydraulic circuit (), the coffee infusion dispensing means () comprise a first coffee infusion dispensing unit () equipped with at least one coffee infusion dispensing nozzle () and at least a second coffee infusion dispensing unit () equipped with at least one coffee infusion dispensing nozzle (), the hydraulic circuit () comprising a first supply pipe () for said first coffee infusion dispensing unit () and a second supply pipe () for said second coffee infusion dispensing unit (), said valve means () comprising a first interception valve () of the flow along said first pipe () and a second interception valve () of the flow along said second pipe ().

Highly flexible use automatic coffee machine

A control circuit, connectable to a domestic power line (L, L), includes a logic controller (), a power supply () for the logic controller (), at least one control switch () for an electrical load () connected to the logic controller (), and an electrically actuated deviator () connected to the logic controller (). The deviator () is switchable between a machine activation status, where a main power line () of the power supply () is connected to the domestic power line (L, L), and a machine deactivation status, where a secondary power line () of the power supply () is connected to the domestic power line (L, L), having a normally open switch () connected to the logic controller (), and energy storage that maintains power supply to the logic controller () for an operating time of the deviator () switching.

Growing community of inventors

Bologna, Italy

Paolo Evangelisti