RU2831438C2 - Mug for use with steam supply device - Google Patents

Abstract

FIELD: utensils.

SUBSTANCE: cup intended for use in conjunction with a steam supply device with a steam stick, comprising a temperature sensor for measuring temperature of the liquid in the cup and a wireless transceiver configured to supply a temperature signal to a receiver of the steam supply device based on the measured temperature, configured to supply a corresponding signal to the controller, controlling operation of three-way two-position electromagnetic valve for start-up and termination of steam supply from steam generator to steam rod and release of excess flow or excess pressure.

EFFECT: control of steam output, which provides greater ease of use.

3 cl, 23 dwg

Description

Field of technology to which the invention relates

The present invention relates to water heaters, and in particular to the control of water heaters.

The invention is designed primarily for use as a method for controlling water heaters and an espresso coffee maker device and is described below with reference to just such an application. However, it should be understood that the present invention is not limited to this particular application.

State of the art

Any mention of prior art in this specification shall not be construed as an admission that such prior art is widely known or forms part of the general knowledge in the art.

In well-known espresso machines, both the pressure and the amount of water supplied to prepare a portion of espresso coffee are regulated. It should be noted that the pressure is usually set between nine and ten bars. The portion is usually about 30 ml and is dispensed in twenty to forty seconds.

A pre-infusion stage is used to wet the ground coffee to allow it to swell in the filter basket, thereby trapping the fine grind and limiting water seepage through the filter. To ensure wetting without forcing water through the ground coffee, the water in this pre-infusion stage is typically supplied at a pressure of between one and five bars.

There is a need for an efficient method and device for dispensing portions with adjustable pressure and volume. There is also a need for an efficient method and device that allows espresso machine water pumps to provide pre-infusion under adjustable low pressure.

Espresso machines are also known to have steam wands. The steam wand produces steam that can be used to heat and froth milk. In some machines, the steam output is controlled by a valve, such as a needle valve. The needle valve provides variable steam output, but it must be turned several times to move from a closed position to a fully open position.

Accordingly, there is also a need for a steam outlet control that provides greater ease of use than with a needle valve.

Disclosure of the essence of the invention

The invention is based on the task of eliminating or reducing the impact of at least one of the disadvantages of the previous level of technology or proposing a useful alternative.

A preferred object of some embodiments of the invention is to provide an improved coffee maker. A preferred object of other embodiments of the invention is to provide an improved espresso coffee maker.

A preferred object of some embodiments of the invention is to provide an improved espresso coffee maker that can provide portions having adjustable pressure and volume.

A preferred object of some embodiments of the invention is to provide an improved espresso coffee maker that can provide adjustable low pressure pre-infusion.

A preferred object of some embodiments of the invention is to provide an improved espresso coffee maker that is a reasonable alternative to a needle valve controller for regulating steam output.

In one aspect of the invention, a device is provided for measuring the resulting flow rate supplied by a pump connected to a pressure relief valve, wherein the device comprises:

the first flow meter for measuring the flow rate feeding the pump;

a second flow meter for measuring the return flow from the pressure relief valve; and

In this case, the resulting flow rate delivered by the pump can be determined by subtracting the measured return flow rate from the measured feed flow rate.

Preferably, the resulting flow rate can be determined (or calculated) in real time and used to stop the pump when the required portion has been dispensed.

In one aspect of the invention, an espresso coffee maker is provided, comprising a flow measuring device described in the present document for measuring small portions dispensed by a pump connected to a pressure relief valve. Preferably, the espresso coffee maker further comprises a pump power variation module described in the present document for providing preliminary infusion.

In one aspect of the invention, an espresso coffee maker is provided, comprising the herein described pump power variation module for providing preliminary infusion. Preferably, the espresso coffee maker further comprises the below described flow measuring device for measuring small portions dispensed by the pump connected to the pressure relief valve.

The power changing unit can preferably provide pressure profiling during the espresso coffee preparation process. More preferably, the pressure profile can be preset or configured by the user. Most preferably, the pressure profile can be in the form of a power-time relationship, representing the electrical power supplied to the corresponding pump.

In one aspect of the invention, a flow measurement method is provided for measuring the resulting flow delivered by a pump associated with a pressure relief valve, wherein the method comprises the following steps:

(a) using the first flow meter, measure the feed flow of the pump;

(b) using a second flow meter, measure the return flow from the pressure relief valve; and

(c) calculating the resulting flow rate at least in part by subtracting the measured return flow rate from the measured feed flow rate.

Preferably, the resulting flow calculation can be performed in real time and used to stop the pump when the required portion has been delivered.

In one aspect of the invention, an espresso coffee maker is provided, comprising a processor device designed to implement the flow measurement method described herein for measuring small portions dispensed by a pump associated with a pressure relief valve.

In one aspect of the invention, a device for monitoring overflow from a container for a fluid is provided, the device comprising:

frame;

removable container for fluid;

a fluid filling port in hydraulic communication with said container; and

a drain pan, wherein the container for the fluid has an overflow opening that is in hydraulic communication with the drain pan.

In one aspect of the invention, an espresso coffee maker is provided, comprising:

espresso coffee maker body;

removable water tank;

a water fill opening located at the front or top of the espresso machine and in hydraulic communication with the water tank;

Front insert drain pan,

Moreover, the water tank has an overflow hole that is in hydraulic connection with the drain pan.

Preferably, the water container is inserted into the housing of the espresso coffee maker from the rear. Alternatively, the water container is preferably inserted into the housing of the espresso coffee maker from the side.

In one aspect of the invention, a device is provided for receiving a removable container for a fluid medium, wherein the device comprises:

body; and

a removable container for a fluid medium, wherein the container has a stopper assembly and a fluid release valve.

According to one aspect of the invention, an espresso coffee maker is provided, comprising:

espresso coffee maker body;

a removable water tank, wherein the water tank has a stopper assembly and a fluid release valve.

Preferably, the water container is inserted into the housing of the espresso coffee maker from the rear. Alternatively, the water container is preferably inserted into the housing of the espresso coffee maker from the side.

Preferably, the water tank has an overflow opening that is in hydraulic communication with the drain pan.

Preferably, the espresso coffee maker includes a flow measuring device.

In one aspect of the invention, a device for controlling the output of steam is provided, wherein the device comprises:

frame;

a steam wand assembly connected to the body and having a steam outlet;

steam outlet controlled by a valve located inside the housing,

valve controlled by a rotary control.

Preferably, the device further comprises a pump that sucks fluid from a fluid container and supplies the fluid to a steam generator; a steam generator that supplies steam to a solenoid valve used to start and stop the supply of steam from the steam generator to the steam wand assembly.

In one aspect of the invention, an espresso coffee maker is provided, comprising:

steam wand with steam outlet;

steam outlet controlled by a valve located inside the espresso machine;

vane controlled valve.

The valve is preferably a ball valve.

The paddle is preferably attached to a round control handle.

In one aspect of the invention, a steam control device for an espresso coffee maker is provided, comprising:

a ball valve in hydraulic communication with a steam wand;

a sleeve having a radially extending lever member; the sleeve is mounted so as to be rotatable relative to the espresso coffee maker; the sleeve and the lever member are operatively connected to the ball valve; and

The device can be configured from a fully closed configuration to a fully open configuration by rotating the sleeve through an angle of less than 180°.

Preferably, the steam control device comprises a switching sensing element for outputting a data signal (or a position signal) to the computing module. More preferably, the data signal indicates a fully open configuration of the device, in which the output of the steam wand is hydraulically connected to the steam generator.

Preferably, the valve is a ball valve in fluid communication with the steam wand assembly, and the rotary control element comprises a sleeve having a radially extending element in the form of a blade; said sleeve is mounted with the possibility of rotation relative to the housing; said sleeve and the lever element are operatively connected to the ball valve; and wherein the device can be adjusted from a fully closed configuration to a fully closed configuration by rotating the sleeve.

Preferably, the permitted angle of rotation of the control element is less than 180°.

Preferably, the device comprises a switch sensor element for outputting a data signal to the processor module. More preferably, the data signal indicates a fully open configuration of the device, in which the outlet of the steam wand assembly is in hydraulic communication with the steam generator.

Preferably, the device further comprises a pump that sucks a fluid from a fluid container and supplies said fluid to a steam generator; the steam generator supplies steam to a solenoid valve used to start and stop the supply of steam from the steam generator to the steam wand assembly. More preferably, the solenoid valve is a three-way two-position solenoid valve used to start and stop the supply of steam from the steam generator to the steam wand assembly.

Preferably, the steam wand assembly is mostly encased in plastic to retain heat in the steam wand spout.

Preferably, the temperature-sensitive element monitors the temperature of the steam wand nozzle. More preferably, the temperature-sensitive element is a thermistor. Most preferably, the steam wand assembly has a steam outlet nozzle that cooperates with the thermistor.

Preferably, when the solenoid valve is closed, the steam path is vented to the atmosphere to limit milk from flowing back into the steam wand assembly. More preferably, the solenoid valve is designed to supply either clean steam from a steam generator or atmospheric air to the Venturi tube.

Preferably, the rotary control element activates one or more switching elements for controlling the steam generation process.

Preferably, the steam wand assembly cooperates with the switching element to determine whether the steam wand assembly is in its predetermined home position.

Preferably, the device further comprises a pressure-sensitive element for monitoring the steam pressure in the steam wand.

It is understood that the device described in this document may be a coffee maker. In particular, the device described in this document may be an espresso coffee maker.

It is also understood that the device described in this document can be used as a coffee maker. In particular, the device described in this document can be used as an espresso coffee maker.

Brief description of the drawings

A preferred embodiment of the invention is described below by way of example with reference to the accompanying drawings.

Fig. 1 shows a perspective view of an espresso coffee maker;

Fig. 2 – diagram of an espresso coffee maker;

Fig. 3 is a block diagram of a method for controlling an espresso coffee maker;

Fig. 4 is a schematic view of the pressure relief valve shown in Fig. 2;

Fig. 5A is a diagram of a circuit based on a silicon controlled valve (SCL) used to change the power supplied to the pump;

Fig. 5B is a diagram of a triode-based circuit for alternating current (triac) used to vary the power supplied to the pump;

Fig. 6A shows the waveform of the supply voltage;

Fig. 6B is a waveform of the modified supply voltage shown in 6A;

Fig. 6C is a waveform of the modified supply voltage shown in 6A;

Fig. 6D is a waveform of the modified supply voltage shown in 6A;

Fig. 7 is a diagram of an espresso coffee maker with a group head with heating;

Fig. 8 is a schematic view of a device that allows the espresso coffee maker proposed in the invention to be filled with water;

Fig. 9 is a schematic view of a device that allows filling the espresso coffee maker proposed in the invention with water, with an overflow channel;

Fig. 10 is a perspective view from the rear of the espresso coffee maker according to the invention, showing the opening for the water container;

Fig. 11A is a perspective view from the rear of the water tank;

Fig. 11B is a perspective view from the rear of the water tank shown in Fig. 10 in an unlocked state;

Fig. 12A is a local side sectional view of the espresso coffee maker shown in Fig. 8 with an inserted water container;

Fig. 12B is a local side sectional view of the espresso coffee maker shown in Fig. 8 with a water container in an unlocked configuration;

Fig. 13A is a local side sectional view of the espresso coffee maker shown in Fig. 8 with the stopper assembly in a locked configuration;

Fig. 13B is a local side sectional view of the espresso coffee maker shown in Fig. 8 with the stopper assembly in the unlocked configuration;

Fig. 14A is a local side sectional view of the espresso coffee maker shown in Fig. 8 with a water valve in an open, coupled configuration;

Fig. 14B is a local side sectional view of the espresso coffee maker shown in Fig. 8 with a water valve in a hermetically sealed configuration;

Fig. 15 is a cross-sectional view of a steam rod, valve and rotary control blade;

in Fig. 16 – a view of the section of Fig. 15 along line A-A;

Fig. 17 is a perspective view of the valve, steam wand and lever shown in Fig. 15;

Fig. 18 is a block diagram of another embodiment of the technology;

Fig. 19 is a block diagram of another embodiment of a steam wand assembly using a wireless communication element;

Fig. 20 is a block diagram of another embodiment of a steam wand assembly using a dependent air flow;

Fig. 21 is a block diagram of another embodiment of a steam wand assembly using a ball valve and an anti-vacuum valve;

Fig. 22 is a block diagram of another embodiment of a steam wand assembly using a valve made of ceramics;

Fig. 23 is a block diagram of another embodiment of a steam wand assembly using two independent controllers.

Implementation of the invention

It is clear that espresso machines are widely used for preparing hot drinks.

Espresso coffee shots are usually brewed by forcing a stream of hot water under pressure through tightly packed finely ground coffee. This forced diffusion of water through the ground coffee results in espresso coffee. The quality, aroma, and taste of the resulting espresso coffee depend on a number of factors, including the structure of the ground coffee, the tightness of its packaging, and the temperature and pressure of the water used. By combining these factors in appropriate proportions, shots of espresso coffee can be produced that are essentially uniform in consistency.

The preparation of suitable espresso coffee by pump-based espresso coffee makers depends at least in part on the pressure (usually expressed in bars) generated by the pump. According to Fig. 1, such a pump-based espresso coffee maker 100 may include: a water container 110 (usually located inside the coffee maker), a spray head or distributor 122 and a filter basket 124 (for ground coffee). For frothing milk, a steam wand 130 and a steam valve 132 may be included in the espresso coffee maker. A drain pan 140 is usually provided to collect splashes and excess water. A number of controls 150 may be provided to set at least some parameters (or factors) associated with the preparation of espresso coffee.

It is understood that some espresso coffee makers have a built-in coffee grinder 160. This may include a loading funnel 162 for feeding coffee beans to the grinding device and an outlet 164 for filling the filter basket (if present) with ground coffee.

When there is water in the water tank and ground coffee in the filter basket, the water is heated and supplied to the spray head 122. After the heated water enters the spray head 122, forced diffusion of the water through the ground coffee in the filter basket occurs, resulting in the preparation of espresso coffee.

Fig. 2 shows a diagram of a coffee maker 200 for espresso. Such a coffee maker contains a container 210 for water, equipped with a reed switch 212 for detecting the water level. The outflow of water from the container 210 provides for passing through a filter 214, which is in hydraulic communication with two paths 216 and 218 of the output flow.

In this embodiment of the invention, the first outlet flow path 216 is intended for connection to the steam generator 250 or for feeding water from the tank 210 to the steam generator 250. This outlet flow path includes a protective filter 220, through which water is supplied to the pump 221, which supplies water under a given pressure. To limit the pressure of the water supplied to the steam generator 250, a pressure relief valve 222 is provided. In case of excessive pressure increase in said fluid supply line, the pressure relief valve 222 supplies or drains water into the drain pan 240, using the fluid supply line 224. For example, the pump 221 supplies water to the steam generator 250 (using the fluid supply line 223) under a pressure of approximately three bars. For a steam system, the pump supplies water to replenish the steam generator under a pressure of approximately 3 bars. The pressure relief valve 222 is designed to operate at higher pressures and is used for protection purposes.

As an example, a steam generator 250 is used to convert water supplied through a fluid supply line 223 into steam. The steam generator includes a heating element 252, a water level probe 256, a temperature-sensitive element (for example, a thermistor) 257, a fuse and thermostat 258 and a vacuum breather valve 259. In the given example, the steam generator has a water heater volume of 0.8 liters. Purely as an example, such a steam generator can be made of one or more materials from a set including die-cast aluminum (preferably with a Teflon liner), stainless steel or brass. The heating element 252 is preferably an immersion heating element with a power of 1000 W. Purely as an example, such a heating element can be made of one or more materials from a set including stainless steel and an Incoloy alloy. It is understood that the heating element may also have another nominal power sufficient for generating steam in the steam generator. In the water level probe 256, three probes are preferably used to monitor the water level, and essentially it consists of three probes made of stainless steel. Purely as an example, the thermistor 257 has a maximum operating temperature of approximately 200 °C.

As an example, the steam 272 coming out of the steam generator 250 is released by the feed ball valve 274 with infinitely variable regulation and passes through the steam wand 276. Preferably, the ball valve has a maximum operating temperature of 150 °C, a nominal operating pressure of approximately 2 bar and a maximum pressure of approximately 8 bar. In this embodiment of the invention, the second outlet flow path 218 passes water from the water tank 210 to the water heater 260 for preparing coffee. This outlet flow path contains a protective filter 230, a first flow meter 233 and a pump 234. Said pump 234 further contains a pressure relief valve 235. This pressure relief valve 235 is designed to limit the water pressure created in the line 236, typically amounting to from nine to ten bar. The safety valve 235 is typically set to a pressure of approximately ten bar, so that if the water pressure exceeds this setting pressure, then some of the water is discharged back into the container 210 through the return line 237, thus maintaining the set setting pressure. The amount of water discharged back through the return line 237 can be measured by a second flow meter 238. The main path 236 of the output flow passes through the heat exchanger 254 of the steam generator 250 to the water heater 260 for preparing coffee.

By way of example, the coffee water heater 260 includes a heating element 262, a water level probe 266, a thermistor 267 and a fuse and thermostat 268. In this example, the coffee water heater 260 has a volume of 0.3 l. By way of example only, such a water heater can be made of one or more materials from a set including die-cast aluminum (preferably with a Teflon liner), stainless steel or brass. By way of example only, the heating element 262 is preferably an immersion heating element with a power of 600 W. In the water level probe 266, two probes for monitoring the water level are preferably used, mainly made of stainless steel. By way of example only, the thermistor 267 has a maximum operating temperature of approximately 150 ° C.

As an example, the outlet of the coffee water heater is used to dispense hot water 282 via a continuously adjustable needle valve 284 via a hot water rod 286. In this example, the needle valve 284 preferably has a maximum operating temperature of approximately 120°C and an operating pressure of approximately 15 bar.

As an example, the outlet from the water heater is also used to supply hot water to the spray head 292 for preparing coffee 294. The electromagnetic valve 296 passes hot water into the spray head 292 for preparing coffee. Said spray head 292 additionally has a pressure gauge 298 for displaying the pressure of the hot water supplied by the water heater for preparing coffee. Purely as an example, the electromagnetic valve 296 has a maximum working pressure of approximately 16 bar and a maximum fluid temperature of approximately 160°C. Purely as an example, the body of the electromagnetic valve 296 can be made of one or more materials from the group consisting of stainless steel and brass. Various protective coatings can be used in the valve, including a nickel coating.

It is understood, solely as an example, that the fluid supply lines are made of either Teflon or silicone tubes.

It is understood that the pumps 221 and 234 may be of the vibratory (displacement) type, although alternative pump technologies may also be used. Vibratory pumps typically develop pressures in the range of 15 to 18 bar, which is generally considered too high for espresso coffee extraction. To regulate the pressure, a pressure relief valve of a fixed or variable setting is used. However, when installing such a valve, the known method of measuring portions requires installing the flow meter as close as possible to the spray head. It is understood that any installation in the flow near the spray head requires that the pressure relief valve be capable of operating at high temperature and high pressure. The design and operation of pressure relief valves are discussed in more detail below.

In one embodiment of the invention, the device 200 includes a processor 202 for receiving commands from the user interface 204 and water level probes, thermistors and fuses/thermostats. The processor is also used to control/activate heating elements and pumps.

In one embodiment of the invention, a pair of flow meters are used, the first 230 of which measures the flow rate feeding the pump, and the second 237 of which measures the return flow rate from the pressure relief valve 235. In such a configuration, the resulting flow rate supplied to the water heater 260 (and therefore to the spray head 292) can be calculated by subtracting the return flow rate from the feed flow rate. By calculating the resulting flow rate over the period of time of coffee preparation, the amount of the portion can be determined. It is understood that such a calculation can be carried out in real time and used to stop the pump when the required portion has been dispensed through the spray head.

In one embodiment of the invention, a flow measuring device for measuring the resulting flow supplied by a pump connected to a pressure relief valve has a first flow meter for measuring the flow feeding the pump and a second flow meter for measuring the return flow from the pressure relief valve. The resulting flow supplied by the pump can be determined by subtracting the measured return flow from the measured feed flow.

Fig. 3 shows a flow chart of a method 300 for measuring a flow rate for measuring a resultant flow rate supplied by a pump connected to a pressure relief valve, wherein the method comprises a step 320 of monitoring (or measuring) a flow rate feeding the pump using a first flow meter; a step 320 of monitoring (or measuring) a return flow rate from the pressure relief valve using a second flow meter; and a step 340 of calculating the resultant flow rate at least partially by subtracting the measured return flow rate from the measured feed flow rate.

It is clear that such a calculation can be carried out in real time and used to stop the pump (350) when the required portion has been dispensed through the spray head. The pressure, the portion size, the duration can be preset or selected by the user (using the user interface 204 and the controller of the coffee maker).

A pre-infusion step is often used to wet the ground coffee to allow it to swell in the filter basket, thereby trapping the fine grinds and limiting the amount of water that passes through the filter. To ensure wetting without forcing the water through the ground coffee, the water supplied during this pre-infusion step is typically at a pressure of approximately three bars. However, it is understood that such pre-infusion pressures may range from one to five bars.

In this embodiment, the pump 230 may be adjustable to create a lower (or reduced) pressure during the pre-infusion stage. This may be achieved by reducing the electrical power supplied to the pump during this stage. In order to allow the processor to control the electrical power supplied to the pump, a power modulation module is typically used, as discussed in more detail below. Preferably, during the pre-infusion stage, the electrical power supplied to the pump allows it to create a pressure lower than normal. The water flowing during the pre-infusion stage may or may not be taken into account in the corresponding portion dispensed through the spray head.

Power control and flow measurement may be used together to measure the resulting portion during pre-infusion. In one embodiment of the invention, the pressure, the portion size and the brewing time may be preset or selected by the user (using the interface 204).

In an alternative embodiment of the invention, in which the system pressure is not measured and cannot be set in units of its measurement, the pressure can be set as a percentage of the maximum pressure generated by the pump. For example, the pressure profile can provide 30% of the maximum pressure for 5 s, then 100% pressure for 20 s, then 70% pressure for the last 5 s. Similarly, in another embodiment of the invention, the system can use a volume output method configured to deliver 5 ml at 30%, 20 ml at 100% and 5 ml at 70% pressure.

It is clear that the power modulation module can also allow pressure profiling during the espresso preparation stage. The pressure profile can be preset or configured by the user (using the interface 204 and the coffee maker controller). The pressure profiling can be in the form of a power versus time curve showing the electrical power supplied to the corresponding pump.

It is clear that the device in question is an espresso coffee maker that can produce portions characterized by adjustable pressure and volume.

It is clear that the device in question is an espresso coffee maker that can provide controlled low-pressure pre-infusion.

Pressure relief valve

A pressure relief valve, also known as an expansion valve, can be used to regulate the water flow pressure in an espresso machine. The regulated pressure can be fixed or adjustable. In many espresso machines based on a vibration pump, the pressure relief valve can regulate the pressure down to nine to ten bars.

According to Fig. 4, the pressure relief valve 400 has an inlet or opening 410 and an outlet or opening 420. The safety part or opening 430 is designed to release water in order to substantially maintain a predetermined pressure. The release seal 432, usually in the form of a ball, a rubber gasket on a brass plunger, etc., is biased into a closed position by a spring 434 (the degree of tension or compression of the spring can be adjusted using an element 436), located opposite the outlet opening 438. When the pressure exceeds a predetermined value, the release seal 432 opens, allowing water to flow in the direction of the safety opening 430.

The outlet is in fluid communication with the relief orifice to generally direct excess water back into the tank.

It is understood that alternative pressure relief valves are designed to be attached to a T-piece, with the T-piece defining the inlet and outlet ports. The flow capacity is usually determined by the dimensions of the pressure relief valve.

Change power

Phase control of power variation is a method of providing AC power to a load only during periods of AC power cycles. Fig. 6A shows a sine wave 600 characteristic of AC power (voltage or current). Each time the curve crosses the zero or neutral line, a "zero crossing" occurs.

The power-shifting circuit diagrams are taken from the Motorola datasheet for the MOC30xx variants. They are used for inductive and resistive loads.

Fig. 5A shows a schematic diagram of a circuit 500 based on a silicon controlled valve (SCL) 530 used to vary the power supplied to the pump.

It is clear that the SCR is typically considered as a device that is either in the on state or in the off state. When in the on state, the SCR can only go to the off state if no current flows through it. A small control electrode current is required to turn on the SCR. The SCR only conducts current in one direction, so if the current reverses, the SCR will turn off because it will not conduct current in either direction.

Fig. 5B shows a schematic diagram of a 550 circuit based on a 580 alternating current triode (triac) used to vary the power supplied to the pump.

It is clear that the triac schematically resembles two counter-connected SCUVs, but having only one control electrode, extending from one of the anodes. This configuration allows the triac to operate on alternating current, but with each change in polarity the triac switches off (despite the fact that a high potential is maintained on the control electrode).

Phase control allows only part of the AC cycle to pass to the load. This can be done by a triac or two back-to-back SCRs.

It is clear that AC sources have two zero crossings per cycle, during which no current flows. In North America the frequency of zero crossings is approximately 120 times per second, while in Europe it is approximately 100 times per second.

Since the triac is turned off at each zero crossing, if it is necessary to supply less power to the load, the triac can be turned on some time after the zero crossing, for example, at time 612 and at time 614, as shown in Fig. 6B.

As shown in Fig. 6B, if half power is required, the triac may be turned on midway between zero crossings (time 622 and time 624). As shown in Fig. 6D, by activating the triac just before each zero crossing (time 632 and time 634), less than half power may be supplied.

Heated group head

It is clear that for an espresso coffee maker (whether for commercial use or home use) it is useful to:

- precisely maintain a constant brewing temperature during multiple coffee extractions and between extractions (for example, when pouring coffee);

- allow simultaneous extraction of coffee and frothing of milk without the negative influence of both processes on each other;

- ensure that the first coffee extraction after turning on the coffee maker is performed at the correct extraction temperature; and

- ensure high performance and temperature stability with minimal and reasonable power consumption.

The typical power draw from a home wall outlet (1700-2400W) may limit the power available to achieve these useful results, especially when large volumes of products (multiple coffees, hot water and milk frothing) are required.

This situation can be exacerbated in commercial/home espresso machines, which typically use lightweight (low thermal capacity) water heaters. For example, the stainless steel water heaters typically used in some espresso machines have a relatively low thermal capacity. Low thermal capacity typically limits the fluid flow rate that can be achieved while maintaining a constant fluid temperature and/or pressure.

It is clear that the combination of steam generator, brewing water heater, heat exchanger and heated group head can be useful to reduce the power requirements of the brewing water heater.

Fig. 7 shows a diagram of one embodiment of an espresso coffee maker similar to that shown in Fig. 2, but having a group head 700 with heating. This embodiment of the invention makes it possible to provide a three-stage sequential process for heating the brewing water, in which:

A. cold water is preheated in heat exchanger 254 of steam generator 250;

B. the preheated water from the heat exchanger (at a temperature below the optimum) is then heated in the brewing water heater 260 to the optimum temperature for brewing (e.g. approximately 92°C); and

B. Water from the brewing water heater passes through the 700 heated group head (to maintain the optimum brewing temperature) and is injected into the ground coffee.

The said heated head 700 has a heating element 710 (usually built-in), a thermal fuse 720 and a thermistor 730.

This configuration of the espresso coffee maker's heating system allows the three heating elements to operate independently and simultaneously. Temperature control of the brewing water heater and group head is typically accomplished using a proportional-integral-differential control module.

In one embodiment of the invention, the ratio of the volumes of the steam generator and the brewing water heater is 10:3. A ratio of the heating element powers (power in Watts) of 10:6:1 (steam generator, brewing water heater, group head with heating) can also be used.

In one embodiment of the invention, the ratio of the vessel capacity to the power of the heating element can be taken as follows:

- for a steam generator – 1000 ml:1000 W or 1 ml:1 W;

- for a teapot – 300 ml:600 W or 1 ml:2 W.

In one of the alternative embodiments of the invention, an additional pressure sensor (or measuring transducer) 740 can be installed to monitor the water pressure in the fluid supply line 236. Said pressure sensor 740 is connected to the microprogram control unit (or microprocessor control device) to provide feedback for the purpose of implementing real-time control of maintaining the selected pressure, and the power supplied to the corresponding pump is changed in accordance with the pressure received via the feedback line from the sensor and subsequent commands from the microprogram control unit, controller or processor. In this embodiment of the invention, the second flow meter 238 is not required. It is understandable that such a modification can also be performed in other steam control systems (for example, in the espresso coffee maker 200).

Water filling unit

It is clear that with a removable water tank located on the back of the coffee maker, it is usually difficult to ensure regular access for refilling it with water. However, refilling the tank with water on site can lead to the user mistakenly overfilling the tank, which leads to spilled water getting inside the body of the espresso coffee maker.

As shown in Fig. 8, one embodiment of the invention of the espresso coffee maker 800 provides an inlet 810 for filling a container with water, located at the top or in front (or in front of the top) of the coffee maker in order to provide relatively easy access to it. The opening 810 can be closed by a hinged door or a lid. The opening for filling water is in fluid communication with a water container 820 (as a rule, by means of a water conduit 830 with a horizontal diverter or funnel). Water 812 can be poured through the opening 810 and passes first vertically 810, then horizontally through an enlarged accumulation part and again vertically 832, falling into a water container 820 located near the base of the coffee maker.

As can be seen from Fig. 9, in order to prevent the container from overflowing and water from entering the body of the coffee maker, a drain channel, cavity or pipe 940 is provided, forming a path 942 for the overflowing fluid medium, allowing excess water to be directed vertically into the rear part of the drain tray 950 for collecting the fluid medium 952. The drain channel is limited by a wall of shortened height, located between the reservoir 822 and the very front wall of the container 820.

In this embodiment of the invention, purely as an example, the drain channel 940 defines an opening 944 for draining excess water, located within the water tank at the maximum filling height of the tank. The drain channel 940 is at least partially integrated into the water tank and directs excess water still within the tank into the drain pan 950.

The use of a drain channel in fluid communication with the drain tray installed at the front of the espresso machine helps to reduce the risk of water entering the components of the espresso machine during the filling of the container with water by providing visual (and preferably also audible) feedback to the user, allowing the filling operation to be completed in a timely manner. This configuration allows water to be added to the container of the espresso machine from above.

In one embodiment of the invention, the espresso coffee maker comprises:

- removable water container;

- a water filling hole located at the top or front of the espresso machine and in hydraulic communication with the water tank;

- front mounted drain pan,

- wherein the water tank includes a drain hole that is in hydraulic communication with the drain pan.

Water tank locking mechanism

A loose water container may move due to vibrations caused by the machine, which may cause it to at least partially slide out of the espresso machine.

The water tank is typically in fluid communication with the espresso machine's water heaters via a release valve. The release valve restricts the flow of fluid from the water tank when the tank is removed (usually when filling it with water and/or cleaning it).

An incompletely connected/disconnected connection between the water tank and the water heater (via the inlet valve) may result in leakage, low brewing pressure during operation, or restricted water flow from the tank to the water heater.

In one embodiment of the invention, a locking mechanism may be used to ensure a secure connection between the water container and the espresso coffee maker. The locking mechanism may limit the unintentional or unwanted detachment of the water container from the body of the espresso coffee maker.

Fig. 10 shows a perspective view from the rear of an espresso coffee maker 1000 in one embodiment of the invention with an opening 1010 for receiving a water container. A connecting element 1020 of the release valve is designed to receive a release valve (not shown in the drawing). A supporting surface 1030 of the locking of the water container is designed to engage a locking mechanism operatively connected to the water container.

In this embodiment of the invention, the water container assembly is inserted into the body of the espresso coffee maker in a substantially horizontal direction.

Fig. 11A, 11B, 12A and 12B show one embodiment of a water tank 1100 assembly comprising:

- a locking mechanism 1110 (best seen in Fig. 13A and 13B) in the form of a mechanical eccentric clamp with an offset axis for fixing the water tank in a position that ensures complete connection of the inlet valve; and

- an outlet valve 1120 (best seen in Fig. 14A and 14B) in the form of a spring-biased plunger valve for horizontal connection with the inlet valve connecting element.

Fig. 11A shows a water container 1100 with a locking mechanism in a locked position, and Fig. 11B shows a water container 1100 with a locking mechanism in an unlocked position.

Fig. 12A shows a partial side sectional view of an espresso coffee maker with a water container in an engaged configuration. In this configuration, the locking mechanism 1110 is in the locked position and the release valve 1120 is open and allows fluid to exit the container.

Fig. 12B is a partial side cross-sectional view of the espresso machine with a water reservoir in a disengaged configuration. In this configuration, the locking mechanism 1110 is in the unlocked position and the release valve 1120 is sealed and does not allow fluid to escape from the reservoir (best seen in Fig. 14B).

As shown in Fig. 13A and 13B, the insertion of the water container 1310 into the housing 1320 of the espresso coffee maker brings the stopper assembly 1330 into close proximity to the locking support surface 1030. After the water container is inserted into the coffee maker, the handle of the stopper assembly can be rotated to the locking position (as best seen in Fig. 13A), in which the curved projection 1332 engages the curved support surface 1342, forming a locked configuration with an offset axis. During the unlocking, according to Fig. 13B, the rotation of the stopper assembly (about the pin 1344) causes the curved projection 1332 to disengage from the curved support surface 1342, forming an unlocked configuration that allows the water container to be removed from the coffee maker. The offset axis configuration of the protrusion may limit unintentional or unwanted separation of the water tank and the espresso machine body.

It is understood that the curvilinear engagement pulls the water container into the espresso machine to the engaged configuration, and the offset position of the projection relative to the axis (in which the axis of rotation formed by the pin 1344 is located above the supporting surface) blocks unintentional or unwanted disengagement of the locking mechanism.

According to Fig. 14A and 14B, the insertion of the water container 1410 into the housing 1420 of the espresso coffee maker brings the outlet valve assembly 1430 into contact with the releasable valve coupling 1440. As soon as the outlet valve assembly comes into contact with the releasable valve coupling 1440, the spring-biased outlet valve 1434 comes into contact with the support surface 1442 and moves the valve to the open engaged position, allowing the fluid to exit the container. During the disconnection process, according to Fig. 14B, the outlet valve assembly 1430 moves away from the valve coupling 1440, causing the spring-biased outlet valve 1434 to move away from the support surface 1442 and moving the valve to the closed position to prohibit the flow of fluid from the container.

Steam control

Fig. 15-17 shows, solely as an example, an embodiment of a steam control device for an espresso coffee maker.

As shown in Fig. 15, the espresso coffee maker may have a steam wand 1500 that rotates about a ball joint 1501. Steam enters the steam wand 1500 from an outlet 1502 of a valve 1503. Instead of using a multi-turn needle valve, in some embodiments of the invention, a ball valve 1504 with infinitely variable regulation is used to continuously regulate the amount of steam supplied to the steam wand 1500 (from its complete shutdown to its complete supply). The ball valve 1504 is mechanically actuated and is mechanically connected to a rotary blade 1505, which allows the user to more reliably control the valve. Due to the fact that the ball valve requires rotation preferably only by an angle of approximately 90° (or at least less than 180°) to move the valve from a fully closed state to a fully open state, the user preferably only needs to rotate the blade 1505 by an angle of 90° or less to fully control the output of the steam wand 1500. A rotation by an angle of up to 180° may be acceptable. In this embodiment of the invention, the inlet port 1506 receives steam from a steam generator (for example, from the steam generator 260 shown in Figs. 2 and 7). The ball valve 1504 is located inside the outer housing 1507 of the espresso coffee maker.

From Fig. 15, 16 and 17 it is clear that the rotary vane 1505 consists of a lever sleeve 1508, to which a radially continuing vane or lever 1601 is attached. Said lever 1601 has a convenient handle and provides the user with the ability to apply a greater torque to the valve 1503. The sleeve has an outer cover 1509 with a slot 1701 through which the lever 1601 passes. The sleeve 1508 also has a longitudinal extension in the form of a hollow cylinder 1510, through which a fastening element 1511 is inserted, connecting the cylinder 1510 with the rotary element of the valve 1504, in this example a ball valve.

As shown in Fig. 15 and 16, the inner part (or the inwardly facing part) of the sleeve 1508 is formed in the form of a curved surface 1602 or has such a surface. The curved surface 1602 interacts with a microswitch 1603, which can be installed inside the mounting bracket or housing 1604. The curved surface 1602 is designed to press on the microswitch 1603 and thereby activate it when the lever 1601 is rotated to a position that allows the valve to emit steam through the steam wand 1500. In this way, the microswitch 1603 can emit a position signal (or data signal) to the microprogram control unit of the espresso coffee maker, which can be used in the microprogram control unit for various purposes. In one example, if the espresso machine is turned on with the microswitch 1603 activated, the microcontroller unit interprets the microswitch output as evidence that the steam wand outlet is in hydraulic communication with the steam generator. In such an undesirable situation, the microcontroller unit either prevents the steam generator from heating up or blocks the steam wand outlet until the user corrects the situation. In a preferred embodiment, both the curved surface 1602 and the microswitch 1603 are located within the housing 1507 of the coffee machine.

In one embodiment of the invention, the steam supply control device of the espresso coffee maker includes:

a ball valve in hydraulic communication with a steam wand;

a sleeve having a radially extending lever element; the sleeve is mounted with the possibility of rotation relative to the espresso coffee maker; the sleeve and the lever element are functionally connected to a ball valve that can be in different states;

wherein the device can be configured from a fully closed configuration to a fully open configuration by rotating the sleeve through an angle of less than 180°.

Typically, the steam control device has a switching sensor element to provide a data signal (or position signal) to the computing module. The data signal may indicate that the device is in a fully open configuration in which the steam wand outlet is in hydraulic communication with the steam generator.

Another embodiment of the invention is shown schematically in Fig. 18. As can be seen from the diagram, the espresso coffee maker 1800 has a pump 1801 that draws water from a container 1802 and supplies it to a steam generator 1803. Steam from the steam generator 1803 is supplied to a solenoid valve 1805. A three-way, two-position solenoid valve 1805 is used to start and stop the supply of steam from the steam generator 1803 to a steam wand 1811. In preferred embodiments of the invention, most of the wand assembly is enclosed in plastic to maintain universal heat in the spout 1812. The temperature of the spout is monitored by a thermistor 1813 and typically corresponds to the temperature of the liquid or milk around the spout 1812. When the solenoid valve is closed, the steam passage communicates with the atmosphere. The connection of the steam passage channel with the atmosphere prevents milk from being sucked back into the steam wand 1811 and the Venturi tube 1806. Milk penetration into these areas can lead to contamination, unpleasant odor and clogging. Valve 1805 is designed to supply either real steam from the steam generator 1803 or atmospheric air to the Venturi tube. The venturi tube 1806 is also supplied with air, preferably compressed air 1807, from an air pump 1808. The air supply from the air pump 1808 is carried out through a check valve 1809. Blockage of the steam wand 1811 can cause back pressure in the steam channel, which can damage the air pump 1808. The check valve 1809 prevents the possibility of back pressure from adversely affecting the air pump 1808. The outlet 1810 of the venturi tube is connected to the steam wand 1811. The steam wand 1811 has a spout 1812 for the outlet of steam with a thermistor attached to it or located adjacent to it or interacting with it, such as a thermistor 1813 with a negative temperature coefficient. The rotary lever 1814 for regulating the steam supply activates switches such as microswitches 1815, 1816. One of the microswitches 1815 controls the automatic process of generating steam. The other microswitch 1816 is used for manual control of the steam supply. The state of the switches 1815, 1816 is controlled by a microprocessor control device 1817. The microprocessor control device also reads the output signal of the thermistor 1813 and controls the air pump 1808 and the electromagnetic valve 1805. The microprocessor control device also reads the signal from the microswitch 1818, the state of which depends on the position of the steam wand 1811. In particular, the microswitch 1818, located near the steam wand, determines when the steam wand 1811 returns to the vertical or original position, i.e. into a position suitable for blowing the steam wand, especially automatic blowing, as explained below.

For automatic steam supply, the user briefly presses the lever 1814 to activate the microswitch 1815. In preferred embodiments of the invention, the steam wand 1811 acts on the spring or other biasing element 1819, so that when the lever is released, it returns to its original neutral position. The signal from the microswitch 1815 (or lack of a signal), detected by the microprocessor control device 1817, causes the electromagnetic valve 1805 to open and steam flows from the steam generator 1804 to the Venturi tube 1806. In the Venturi tube, the steam from the steam generator is mixed with air 1807 supplied by the air pump 1808. The air-steam mixture passes through the steam wand 1811 and exits from the spout 1812 directly into a container 1820, preferably a milk container. The temperature sensor 1813 measures the temperature and transmits a corresponding signal to the microprocessor control device 1817. The microprocessor control device then displays the milk temperature on the display 1821. Preferably, the display 1821 is located on the front panel of the espresso coffee maker or a separate milk frothing device. When the milk in the container reaches the set temperature, the electromagnetic valve 1805 and the air pump 1808 are switched off or deactivated. When the electromagnetic valve 1805 is deactivated, the steam path to the steam wand 1811 is connected to the atmosphere 1805.

The air pump can operate independently, turning on and off according to a set temperature, time or combined logic.

In manual control of steam dispensing, the user operates the steam control lever in the opposite direction, causing the second microswitch 1816 to operate. This leads to the opening of the electromagnetic valve 1805 and the supply of steam from the steam generator 1803 to the Venturi tube. In this mode, the steam passes directly through the Venturi tube, and the air 1807 does not enter the steam passage channel. The steam passes through the steam wand 1811 and exits from the spout 1812 directly into the container 1820. The temperature sensor 1813 measures the temperature of the milk in the container 1820, and then a corresponding signal is transmitted to the microprocessor control device 1817. The microprocessor control device displays the temperature of the milk on the display 1821 located on the housing. When sufficient steam has been supplied, the user releases the steam supply lever 1814 back to the original or neutral position. The electromagnetic valve 1805, thus deactivated, is connected to the atmosphere. When the steam passage channel is opened to atmospheric pressure, condensation of hot steam in the passage channel prevents milk from container 1820 from being sucked back into spout 1812.

In the alternative semi-automatic mode, the user can select a temperature (this can be a factory or user setting) so that when the user froths milk, the sensor recognizes and/or calculates that the user has approached the user-selected temperature and notifies the user with an audible or visual (on the display) feedback signal to stop dispensing steam.

In preferred embodiments of the invention, after the automatic steam generation function is performed and the container 1820 is removed, the microswitch 1818 senses when the steam wand returns to the “home” or safe down position. The signal from the microswitch 1818 is detected by the microprocessor control device 1817 and results in a short-term (for example, 1 sec) opening or a series of short-term openings of the electromagnetic valve 1805 to purge the opening of the spout 1812. Such a function can be performed automatically to clear the channel from foam residues. In some embodiments of the invention, this function can be preceded by a warning sound or visual signal to alert the user that steam will be emitted from the spout 1812. The presence of a touch sensor for the position of the steam wand or the microswitch 1818 ensures the execution of other automatic functions when the steam wand is in the home or fully lowered position. The air flow rate or speed of the air pump 1808 can be controlled, for example, by pulse width modulation. Such air flow rate or speed of the air pump 1808 can be controlled by the user via the user interface 1822. Controlling the output of the air pump 1808 is equivalent to setting the structure of the frothed milk in the container 1820. A high flow rate will create a more structured or airy foam, while a low flow rate will result in a thicker, less structured foam.

In one embodiment of the invention, a pressure sensor 1830 may be used to allow the microprocessor control device 1817 to regulate the pressure of the steam in the steam wand 1811. In this embodiment of the invention, the pressure sensor is connected to the passage of steam between the Venturi tube 1806 and the steam wand 1811. It is understood that this allows: to detect the fact of partial or complete blockage of the steam wand (usually due to the formation of deposits at the outlet of the steam wand), which allows the microprocessor control device 1817 to stop performing the steam generation function and / or notify the user about the occurrence of a problem; and to provide feedback in real time on the combined pressure of steam and air to allow the microprocessor control device 1817 to regulate the air flow rate provided by the air pump in order to achieve a set pressure value.

As shown in Fig. 19, the temperature of the fluid heated by steam in the mug 1900 can be wirelessly transmitted to the input of the process control unit 1901. In this example, the mug 1900 comprises a thermistor, such as a negative temperature coefficient thermistor, and a transceiver 1902, such as an RFID transceiver, Wi-Fi, Bluetooth or infrared transceiver. The transceiver 1902 emits a radio signal (or other radio frequency signal), which is received by an associated receiver chip or base station 1903. The receiver or base station 1903 transmits a corresponding signal to the input of the process control unit 1901. As in the previously mentioned embodiments of the invention, the vaporization device shown in Fig. 19, includes a steam generator 1904, which produces steam to a three-way two-position electromagnetic valve 1905. Said electromagnetic valve controls the flow of steam entering the Venturi tube 1908, while allowing excess flow or excess pressure to be discharged into the atmosphere 1906, primarily directing the discharge into a drain pan 1907 located below the mug 1900. As in other embodiments of the invention, the Venturi tube receives air or compressed air from an air pump 1909. A safety check valve 1910 is located between the air pump and the suction inlet of the Venturi tube 1911.

As shown in Fig. 19, the steam wand interacts with the steam wand position sensor 1912. The steam wand position sensor 1912 outputs a signal to the process control unit 1901. When operating in the manual control mode, the process control unit 1901 allows the steam to be discharged through the electromagnetic valve 1905 in any position of the steam wand. However, in the automatic steam supply mode (when the user does not have the ability to control the steam outlet using a key or control knob) or during automatic cleaning of the steam wand, the process control unit 1901 allows the electromagnetic valve 1905 to operate only if the steam wand is in a predetermined (“lower”) position, which is determined by the position sensor 1912.

As shown in Fig. 20, in some embodiments of the invention, it is required that the primary steam supply solenoid valve 2000 is controlled jointly or simultaneously or in another relationship with the air pump 2001. The air pump may begin operation with a delay relative to the start of steam supply. To achieve this, the same output 2002 of the process control unit 2003 is used to control the on and off of both the solenoid valve 2000 and the air pump 2001.

As shown in Fig. 21, a manually operated valve, such as a ball valve 2100, is used to provide the user with the ability to control the output of steam from the steam generator 2101. Steam passing through the ball valve 2100 is supplied to the venturi tube 2102. An anti-siphon or anti-vacuum valve 2103 is installed between the ball valve 2100 and the venturi tube 2102. Such an anti-vacuum valve 2103 prevents the occurrence of a negative pressure above the venturi tube and the resulting suction of fluid into the ball valve, the steam generator or other aspects of the espresso coffee maker located upstream of the valve 2103. The ball valve 2100 communicates with a sensor 2104. Said sensor transmits data about the current position of the ball valve to the process control unit 2105. Having information from the sensor 2104 about the position of the ball valve, the process control unit 2105 can use this information to display a warning signal 2106 on the outer surface of the steam generator or espresso coffee maker, which indicates, for example, that the path of steam to the steam wand is open. In some embodiments of the invention, if the sensor 2104 indicates that the ball valve is open, then the process control unit 2105 immediately issues a command to supply power to the steam generator 2101. This approach allows preventing accidental activation of the steam generator when the espresso coffee maker is first turned on when the ball valve 2100 is open.

As shown in Fig. 22, instead of the ball valve 2100 shown in Fig. 21, a multi-port ceramic control valve 2200 can be used. Said ceramic valve provides additional control flexibility by providing the ability to use several different flow paths selected by a single rotary valve handle, namely, the valve handle associated with the ceramic valve 2200. Thus, the ceramic valve 2200 can have a bypass port 2201 leading to a bypass channel 2202 that opens either to the atmosphere 2203 or, more often, to a drain pan 2204 located below the mug 1900. The ceramic rotary valve 2200 can also have a manual bypass channel 2205 that allows steam from the steam generator 2101 to bypass the venturi tube 1908. Because the venturi tube typically presents an obstruction to the flow path, the manual bypass passage 2205 allows a larger volume of steam to be supplied to the steam wand 2210.

As shown in Fig. 23, two separate process control units 2300, 2301 are used to control the main steam solenoid valve 2302 and the air pump 2303 that supplies air to the venturi tube 2304. In one embodiment of the invention, a pressure detection sensor or diaphragm switch 2305 detects pressure in the line 2306 between the solenoid valve 2302 and the venturi tube 2304. In the event that pressure is detected by the pressure sensor or diaphragm switch, a signal is output to the input of the second process control unit 2301. The second process control unit 2301 interprets such a signal as a command to supply power to the air pump 2303. In other embodiments of the invention, the diaphragm switch 2305 is not required. Instead, a user-controlled control element 2310 is used, by means of which a signal is sent to the second process control unit 2301 or a switch position is transmitted, which is interpreted as a command to supply power to the air pump 2303. If necessary, the user-controlled control element 2310 can be deactivated if the main solenoid valve 2302 is closed.

Interpretation of the patent description

It is understood that some embodiments of the invention are described in this document as a method or a combination of method elements that can be implemented by a computer system processor or other means for performing such a function. Thus, a processor with the necessary set of instructions for implementing such a method or method element is a means for implementing the method or method element. In addition, the hardware implementation element of the device described in this document is an example of a means for performing a function performed by the element for the purpose of implementing the invention.

In alternative embodiments of the invention, one or more processors operate as a stand-alone device or may be connected, such as networked, to another processor(s) in a network deployment, one or more processors may operate as a server or client computer in a server-client network environment, or as a peer computer in a peer-to-peer computer network or in a distributed network environment.

Unless otherwise stated, as will be seen from the following discussion, it should be borne in mind that throughout the description the use of terms such as “processing”, “data processing”, “calculation”, “determining”, etc. refers to an action and/or process performed by a computer or computing system or similar computing device that manipulates data and/or transforms data represented by physical, such as electrical, quantities into other data also represented by physical quantities.

Similarly, the term “processor” may refer to any device or part of a device that processes electrical data, such as from registers and/or memory devices, to convert that electrical data into other electrical data, such as those that may be stored in registers and/or memory devices. A “computer” or “computing machine” or “computing platform” may include one or more processors.

The methods described in this document may, in one embodiment of the present invention, be implemented by one or more processors that accept machine-readable (also called machine-readable) codes containing a set of instructions, the execution of which by one or more processors implements at least one of the methods described in this document. A processor is any processor capable of executing a set of instructions (sequentially or otherwise) indicating actions to be performed.

Unless the context otherwise requires, throughout the description and in the claims the terms “comprise”, “containing”, etc. shall be understood in a broad sense as opposed to an exclusive sense; i.e. in the sense of “including, but not limited to”.

Similarly, it should be borne in mind that the term "associated" when used in the claims should not be understood as referring only to a direct connection of the elements. The terms "associated" and "connected" may be used together with their derivatives. It should be understood that these terms are not synonyms. Thus, the meaning of the expression device A is associated with device B is not limited to the fact that the output of device A is directly connected to the input of device B. The expression means that there is a path between the output of device A and the input of device B, including other devices and means. "Associated" may mean that two or more elements are either in direct physical or electrical contact with each other, or that two or more elements are not in direct physical or electrical contact with each other, but nevertheless cooperate or interact with each other.

As used in this document, unless otherwise stated, the use of the ordinal numerals “first,” “second,” “third,” etc., in describing a common object merely signifies that the various instances or similar objects are the instances or objects being referred to, and are not to be taken as instances or objects being in the specified sequence in time, space, rank, or in any other sense.

Reference throughout the specification to “one embodiment of the invention” or to “an embodiment of the invention” means that a particular feature, structure, or parameter described in connection with that embodiment of the invention is included in at least one embodiment of the invention. Thus, the appearance of the phrases “in one embodiment of the invention” or “in an embodiment of the invention” in various places in the specification do not necessarily refer to the same embodiment of the invention, but may refer to the same embodiment of the invention. Moreover, particular features, structures, or parameters may be combined in any way in one or more embodiments of the invention, as will be apparent to one skilled in the art from the present specification.

Similarly, it should be understood that in the above description of embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, drawing, or description for the purpose of optimal organization of the description and facilitating understanding of one or more different inventive aspects. Such manner of describing the invention, however, should not be taken as an intention to indicate that the claimed invention requires more features than are expressly set forth in each claim. Rather, as is apparent from the following claims, the inventive aspects lie in less than all of the features of one of the embodiments described above. Accordingly, the claims following the detailed description of the invention are hereby expressly incorporated into said detailed description of the invention, each claim of which represents a separate embodiment of the present invention.

Moreover, although some embodiments of the invention described herein include some, but not all, features included in other embodiments of the invention, it is intended that any combinations of the various embodiments of the invention fall within the scope of the present invention and form other embodiments of the invention, as will be understood by those skilled in the art. For example, in the following claims, any of the claimed embodiments of the invention may be used in any combination with other embodiments.

In the present description, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In other instances, well-known methods, structures, and techniques have not been shown in detail in order not to obscure the present invention. Although the present invention has been described with reference to specific examples, it should be understood by those skilled in the art that the present invention may be implemented in many other forms.

Claims (5)

1. A mug intended for use with a steam supply device with a steam wand, comprising: temperature sensor for measuring the temperature of the liquid in the mug and a wireless transceiver configured to supply a temperature signal to a receiver of a steam supply device based on the measured temperature, configured to supply a corresponding signal to a controller controlling the operation of a three-way two-position electromagnetic valve for starting and stopping the supply of steam from the steam generator to the steam wand and relieving excess flow or excess pressure. 2. A mug according to claim 1, wherein the temperature sensor is a thermistor. 3. A mug according to item 1, in which the receiver is designed with the possibility of sending a corresponding signal to the controller input.