Milk frothing device and system, coffee machine and related operating methods

Abstract

A milk frothing device and system, a coffee machine and an operating method thereof are disclosed. The milk frothing device has at least one processor. The at least one processor is configured to perform the following method including the following steps: counting the number of actuators activated by contact with the bottom surface of the container; determining the presence or orientation of the container based on the calculated number of activated actuators; and controlling the operation mode of the milk frothing device based on the determined presence or orientation of the container.

Description

[0001] This application is a divisional application of a patent application with an application date of May 22, 2018, application number 201880033780.6, and title “Sensor Component”. Technical Field

[0002] The technology involves an orientation sensor adapted to work with a temperature sensor for a metal milk steamer. Background Art

[0003] Espresso making machines are known to incorporate milk frothing or milk steaming wands. In one popular machine configuration, the steam wand, portable filter group head, and optional grinder outlet are located above and share a common drip tray. The drip tray provides a convenient platform in the form of a permeable grid. Some machines have a sensor that contacts the bottom of a stainless steel or other metal milk steaming pot. When the sensor is in ideal contact with the bottom of the pot, the temperature measurement can effectively represent the temperature of the milk when it is heated by the steam wand. The sensed temperature can be used by the machine's processor to control the steaming operation, including stopping some operations when a target temperature is reached.

[0004] However, if the required face-to-face contact between the sensor and the pot is misaligned or incomplete, the temperature measurement made by the sensor may be misleading or useless.

[0005] The jug can be mechanically restrained so that only surface contact between the jug and the sensor is mechanically possible. However, in espresso machines, particularly home or compact machines, this approach has two disadvantages. First, it requires additional space on the machine platform to provide the mechanical restraint feature. In compact kitchen units, this additional space is problematic. Second, a mechanical feature is provided to inhibit the jug from disrupting the flatness of the platform. The platform is desirable because it is aesthetically pleasing and easy to clean.

[0006] In some actual use cases, the kettle may not be properly aligned with the sensor and the user may not be aware of this. In some processor-controlled operations, the orientation of the kettle is important. Detecting incorrect alignment can be accomplished with a conventional temperature sensor. For example, when the processor receives no temperature signal or an insufficient temperature signal, the processor can take this information to indicate that the kettle is not present or that the kettle is misplaced. When the processor receives an adequate temperature signal, the presence of the kettle can be inferred. However, because the kettle may be cold and because it takes time to make accurate thermal measurements using sensors, this orientation or placement data is poor because it is slow and lags behind the actual event (i.e., the misplacement or presence of the kettle).

[0007] Furthermore, the processor can compensate for small degrees of misalignment if this can be detected. Advantageously, the tilt or orientation sensor can provide a signal to the processor that is indicative of the orientation of the pot independent of the temperature signal or temperature rise and before the texturing cycle begins. At the same time, the user can be alerted without interrupting the steaming operation.

[0008] There is a need for a means of sensing when a milk jug is present. There is also a need for a means of sensing that the jug is misplaced. Preferably these means are combined to save cost and facilitate assembly. Summary of the invention

[0009] It is desirable to provide an orientation sensor for a milk steamer. Orientation may be considered to include presence, tilt and vertical travel.

[0010] There is also a need to provide a notification, warning or alarm using a user interface which indicates when the milk steamer is misaligned relative to the temperature sensor.

[0011] There is also a need to provide a coffee maker having a group head and a steam wand positioned on a common platform, the platform including a container orientation sensing assembly.

[0012] There is also a need to provide an automated steaming method that includes compensating for temperature measurements or orientation measurements related to the orientation of the milk steamer.

[0013] There is also a need to provide an automated milk steaming apparatus having a steam wand located above a temperature sensor on a platform. In some embodiments, the distance between the end of the wand and the sensor is fixed and optimized for automated steaming operation in a pot supported by the platform. In a preferred embodiment, this arrangement is adjacent to a group head of an espresso machine.

[0014] There is also a need to provide automatic actuation of a texturing cycle when a combination of automatic actuation parameters are present.The processor may optionally be programmable to non-manually initiate a texturing operation without further user input.

[0015] It is an object of the present invention to at least substantially meet one or more of the above needs, or at least to provide a useful alternative to the above sensors.

[0016] In a first aspect, the present invention provides a sensor assembly for determining the temperature and orientation of a kettle, the kettle having a bottom surface resting on the assembly, the sensor assembly comprising:

[0017] a temperature sensor for generating a temperature signal indicating a temperature of the bottom surface, the temperature sensor being driven to move in a first direction;

[0018] a diaphragm sealably engageable with the temperature sensor and a platform supporting the kettle such that the temperature sensor extends through the platform to engage the bottom surface;

[0019] a retainer connected to the temperature sensor and restricting movement of the temperature sensor in the first direction; and

[0020] A signal generator is used to generate a signal when the temperature sensor moves against the urging to displace in the first direction.

[0021] Preferably, the signal generator is a contact.

[0022] Preferably, the signal generator is a switch.

[0023] Preferably, the switch is a micro switch.

[0024] Preferably, the sensor assembly comprises:

[0025] three or more signal generators; and

[0026] A processor is adapted to determine the orientation of the kettle based on the signal received from the signal generator.

[0027] Preferably, the orientation of the jug is one or more of the following:

[0028] the presence of said kettle being indicated when at least one signal generator provides a signal;

[0029] a tilt of the kettle indicated when at least one signal generator provides a signal and at least one signal generator does not provide a signal,

[0030] The direction of the pitch of the kettle is determined by identifying the signal generator which does not provide a signal.

[0031] Preferably, when the processor determines tilt of the kettle, the processor sends a command signal to the user interface to display a user alert, and the processor also limits operations performed on the kettle to a pre-set time limit.

[0032] Preferably, the operation is a steaming operation.

[0033] Preferably, the processor ceases to apply the pre-set time limit when tilting of the jug is no longer indicated.

[0034] Preferably, the temperature sensor has one or more attachment slots; and

[0035] The retainer has a channel including one or more detents engageable with the attachment slot.

[0036] Preferably, the retainer has a first thickness and a second thickness, the second thickness being greater than the first thickness;

[0037] The channel terminates in a rounded end; and

[0038] The rounded end is located in the second thickness.

[0039] Preferably, the channel has a tapered guide.

[0040] Preferably, the signal generator is located on the component;

[0041] The temperature sensor has a cable which extends in a substantially straight line towards an opening in a component of the assembly and through the opening.

[0042] Preferably, the component is a printed circuit board.

[0043] Preferably, the printed circuit board comprises a quick connect electrical coupling and / or auxiliary processor adapted to receive the signal and provide a processed signal to the processor.

[0044] Preferably, the sensor assembly further comprises a spring connected to the diaphragm and adapted to support an internal shelf beneath the platform, thereby biasing the temperature sensor in the first direction.

[0045] Preferably, the sensor assembly is locatable in a mounting beneath the platform, the mounting having an opening through which the temperature sensor extends in use; and

[0046] The holder is located below the mounting member, so that movement of the temperature sensor in the first direction can be limited by the holder being supported on the mounting member.

[0047] Preferably, the gap between the mounting member and the platform is covered by a thin plate top to form a discontinuous flat platform surrounding the temperature sensor assembly.

[0048] Preferably, the sensor assembly further comprises an actuator, wherein the actuator comprises:

[0049] Pedestal;

[0050] Neck; and

[0051] build;

[0052] The retainer has an opening adapted to receive the neck of the actuator, and the cover and the base support the retainer so that the actuator engages with the retainer.

[0053] Preferably, the actuator is an elastomeric fastener; and

[0054] The elastomeric fastener also has a handle for pulling the elastomeric fastener through the opening of the retainer.

[0055] Preferably, the base of the actuator has one or more openings for increasing the compliance of the actuator.

[0056] Preferably, the base has electrical contacts for operating the signal generator.

[0057] In a second aspect, the present invention provides a coffee maker comprising the sensor assembly of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Preferred embodiments of the present invention will now be described by way of example only with reference to the accompanying drawings:

[0059] Figure 1 is a perspective view of a coffee maker showing a pot temperature sensor with tilt detection capability.

[0060] Figure 2 yes Figure 1 An exploded perspective view of the temperature sensor and tilt sensor shown in FIG.

[0061] Figure 3 is a perspective view of the retainer.

[0062] Figure 4 A side view and a perspective view of the actuator are shown.

[0063] Figure 5 A side view and a perspective view of the actuator are shown.

[0064] Figure 6 is a perspective view of the temperature sensor and the tilt detector.

[0065] Figure 7 is another embodiment of a temperature sensor and tilt detector for a milk jug in an espresso machine.

[0066] Figure 8 is an alternative embodiment of a tilt sensor.

[0067] Fig. 9 is a plan view of the circuit board used for the tilt sensor.

[0068] Fig.10 is a plan view of another embodiment of a circuit board for a tilt sensor.

[0069] Fig.11 is a side view of an assembly cut away to show a temperature sensor having tilt sensing capability.

[0070] Fig.12 is a side view partially cut away to illustrate the operation of the tilt sensor.

[0071] Fig.13 is a side view partially cut away to illustrate the operation of the tilt sensor.

[0072] Fig.14 is a flow chart illustrating the integration of a jug orientation sensor into an automated milk steaming environment.

[0073] Fig.15 is a flow chart illustrating how the tilt sensor operation affects the automated milk steaming operation.

[0074] Fig.16 is a cross-sectional view of a combined temperature and orientation sensor along with a steam wand and steam back pressure sensor.

[0075] Fig.17 is a schematic flow chart showing an automated steaming sequence. DETAILED DESCRIPTION

[0076] like Figure 1 As shown, the espresso machine 100 has a group head 101 and a steam wand 102 located above a drip tray 103 .

[0077] The drip tray 103 has a grid and its upper surface forms part of a larger flat surface or platform 104. The platform 104 includes a useful flat surface with an opening 105 formed therein. The temperature sensor assembly 106 extends through the opening. In this example, the platform is divided so that the grid 122 can be removed with the removable drip tray 103 while the sensor assembly 106 and its flat surrounding area remain stationary with the machine 100.

[0078] Figure 1 The machine 100 shown in FIG. 1 also includes a coffee grinder outlet 107 and a portable filter cradle 108 associated with an optional internal coffee grinder having a bean hopper 109. The machine 100 has a graphical user interface 110 located above the group head 101 on the front surface.

[0079] The machine 100 includes an internal water reservoir 111 and a boiler and water heater required for coffee making purposes. User preferences, process parameters and other information regarding the grinding, brewing and steaming operations can be provided on the user interface 110. The user interface 110 will allow the user to make selections that serve as inputs to the processor 120. Buttons (e.g., 121) and touch screens 110, 120 are known and can be used for these purposes 120.

[0080] In this example, the platform 104 extends across the entire width of the removable drip tray 103. The platform 104 extends the full depth of the drip tray 103. However, the platform 104 cannot extend the full depth of the machine 100 because the internal components of the machine 100 require the upright main body portion 112.

[0081] An upright body portion 112 interconnects the base 113 with the head 114. The head 114 has a bottom surface from which the steam wand 102, the group head 101, and the grind outlet 107 extend. In this example, the bottom surface also includes an opening for receiving a removable tamper 115 that is magnetically secured into the opening. The head 114 may also include one or more switches 130, 131 that interact with the pivoting wand 102. The one or more switches 130, 131 provide information to the processor 120 about the position of the wand 102. For example, one switch 130 may send a signal to the processor 120 when the wand 102 is in a fully downward or original orientation. A second switch 131 may provide a signal to the processor 120 when the steam wand 102 is fully extended or in a "reset" position. For example, the wand position can be used to generate a washer wash sequence when the wand 102 is in the original orientation, and can also be used as a way to indicate to the processor 120 that a new cycle can be started after the wand 102 has been placed in the reset position. Reference Fig.16 and 17 , mention is made of the use of rod 102 position switches 130, 131, a temperature signal and a kettle orientation signal (as will be explained below).

[0082] The machine 100 is intended to perform many milk steaming operations while the milk jug rests on the platform 104 without being held by a person.

[0083] like Figure 2 As shown, an internal subassembly or chassis component 200 of the machine 100 is integrally formed with or already secured to a mount 201 for a temperature sensor 202. The temperature sensor 202 has a metal body 204 having a flat upper surface 203. The body 204 is a cylinder having one or more and preferably a pair of opposing attachment slots 205. The temperature sensor 202 generates a temperature signal that is transmitted to the device's processor 120. The processor 120 receives signals and inputs 206, 110 from other sensors and sends signals 207 for controlling processes and aspects of the machine's operation. The processor 120 also sends signals 208 for controlling the user interface 110 and features such as an on / off switch light ring 121 and dedicated indicator transducers, speakers, or a single LED warning light 122.

[0084] It will be appreciated that the temperature sensor cable 209 generally extends through the interior of the sensor assembly 106 along a centerline 210, exiting the sensor area through an opening in a printed circuit board or other assembly component 211 located beneath the mount 201. In this example, that component is a printed circuit board 211 that supports the tilt sensor.

[0085] In this example, the temperature sensor 202 is carried by a resilient diaphragm 212 or rolling diaphragm 212. The diaphragm 212 is clamped by its edge between the mounting 201 and a cover or plate 213. The mounting 201 provides a mounting opening 214 in an internal shelf 215 that receives the lower end of a conical compression spring 216. The upper end of the compression spring 216 is supported on the underside of the diaphragm 212. The spring 216 provides a force that resists the downward movement of the sensor 202.

[0086] As previously described, the sensor body 204 has a retaining slot 205 that cooperates with the retainer 217. The retainer 217 has a mouth 218 with a tapered guide 303 for engaging the slot 205. The upward movement of the sensor 202 is limited by the retainer 217 when it contacts the underside of the mount 201.

[0087] exist Figure 2 In the example of the embodiment of the present invention, the holder 217 has an array of three coupling points 219. Each coupling point 219 is suitable for carrying or optionally holding the upper end of an actuator of an electrical switch 220. The three actuators 220 carried by the holder 217 are located above the printed circuit board 211. The printed circuit board 211 can have its own signal processor 221 as required for receiving contact signals from each switch 220. The printed circuit board 211 can also provide a side of a quick-connect electrical coupling 222 to simplify the electrical connection of the three switches 220 to the processor 120. In this example, the printed circuit board 211 is mounted to the underside of the mounting member 201 using one or more fasteners 223. The bottom side housing member 224 is attached to the underside of the sub-chassis 200 using one or more fasteners 225 to form a compartment below the diaphragm 212.

[0088] like Figure 3As shown, the retainer 217 includes a major upper surface 300 and a thinner secondary upper surface 301 below it. There may be a taper or step 302 between the surfaces 300, 301 to facilitate manual assembly. The secondary upper surface 301 forms a tapered guide 303 leading to a channel 304. In practice, the temperature sensor 202 is inserted into the channel 304 through the guide 303. Upon insertion, the one or more grooves 205 are engaged by one or more cooperating detents 305 extending into the channel 304. The channel 304 terminates the stress in a relief portion 306 having a rounded end 307. The relief portion 306 is formed as a thicker material associated with the major upper surface 300. It allows the retainer 217 to flex as needed during assembly and disassembly.

[0089] The holder 217 also has three neck openings 310 , 311 , 312 . In this example, the neck openings 310 , 311 , 312 are formed in pockets 313 , each pocket 313 having an upstanding edge 314 .

[0090] It is understood that the retainer 217, and in particular the underside of the retainer 217, can be used to activate the one or more electrical switches by vertically striking the one or more electrical switches. Therefore, one of the purposes of the retainer 217 is to convert the movement of the sensor 202 into the movement of the actuator 220 and cause the resulting electrical tilt, which indicates the switching on the printed circuit board 211.

[0091] The occurrence of switching depends on the vertical movement and tilt orientation of the holder 217. Therefore, the sensor assembly 106 can be regarded as including a misalignment, orientation or tilt sensor on a switch provided by or carried by the printed circuit board 211, with one or more signals generated by the actuator 220 as its electrical output.

[0092] exist Figure 3 In a specific example, the retainer 217 is adapted to mechanically engage or capture Figure 4 and Figure 5 An actuator 400, 500 of the type shown in FIG.

[0093] like Figure 4As shown, the actuator 400 includes a flat electrical contact 401 on its underside. The actuator 400 in these examples also includes an elastomeric fastener portion or fastener 402. The fastener 402 has a base, above which is a shoulder surface 403, the shoulder surface diameter is larger than the opening 310 and does not pass through it. The fastener 402 also has a neck 404 that fits through and is captured in the opening 310 of the retainer. The fastener 402 has a tip or handle 405 for pulling the fastener 402 through the opening 310. When the actuator fastener tip 405 is pulled through the opening 310, the fastener 402 stretches to allow the tapered cover 406 to pass through the opening 310. In this way, the retainer 217 is mechanically connected to the printed circuit board 211. Cushioning of the movement of the retainer 217 and softness or compliance of the polymer actuator 400 may be provided by way of one or more openings 407 formed in or through the actuator base 408 .

[0094] like Figure 5 As shown, the actuator 500 has a fastener portion 501 and an electrical contact 502 on its bottom surface. In this example, the cushioning and other mechanical properties of the actuator 500 can be controlled in the selection of the material and shape of the interconnecting legs 503 of the actuator. Each leg 503 is "V" shaped or "U" shaped. One end of each leg 503 is attached to an upper portion 504 having a shoulder surface 505, a neck 506, a conical cap 507 and a tip 508. The other end of the leg 503 is attached to a separate bottom portion 509, and the contact surface 502 is attached to the separate bottom portion 509. As shown in FIG. Figure 6As shown, three (or more) separate tilt switches 600 can be mounted directly above the upper surface of a printed circuit board 601 in use. The circuit board 601 has an optional central opening 602 through which an electrical cable 603 associated with a temperature sensor 604 can pass. Movement of the temperature sensor 604 in any direction 605 is converted into a similar movement in the holder 217. The movement causes, for example, no actuator, some actuators, or all actuators (e.g., 220) to contact the printed circuit board 601. When all three switches 600 are actuated, the processor 120 senses and uses this information to determine that the kettle is acceptably placed on the sensor 604. If no information is received from the switch 600, the processor 120 interprets the lack of signal as an indication that there is no kettle on the temperature sensor 604. Activating two switches 600 in the tilt sensor can be used to indicate tilt (and tilt direction). When two switches in the tilt sensor are activated, the processor 120 can cause certain actions that do not interrupt the steaming operation. In this state, the processor 120 can generate a user alert and send it to the user interface 110, 122. This alerts the user that there is a less than ideal orientation of the kettle and provides the user with an opportunity to improve the position of the kettle relative to the sensor assembly 106. The processor 120 can also use this switch state to limit the current steaming operation to a pre-set time limit. This makes it less likely that over-steaming will occur due to edge thermal contact caused by misalignment between the kettle and the sensor assembly 106.

[0095] like Figure 7 As shown, the complete mechanical switch mechanism 700 can be assembled directly onto a printed circuit board 701. In this embodiment, the actuator 702 need not carry electrical contacts or conductors.

[0096] like Figure 8 As shown, the printed circuit board 211 need not carry a tilt switch. The processor 120 can determine the tilt (including direction and degree) by detecting electrical signals from three discrete switches (eg, micro switch 800 located directly below the actuator 801).

[0097] like Fig. 9 and Fig.10 As shown, various switches on the printed circuit board 211 (or switch arrangement) of the tilt sensor can be provided for series or parallel operation. In series operation, as shown in FIG. Fig. 9 As shown, the underside of the actuator is metal 401. It contacts the nested spiral circuit track 900. Contact with any one of the contact areas 900 results in a short circuit in the circuit between the two main contacts 901, 902. This arrangement does not directly provide the direction or magnitude of the tilt. Fig.10 In the parallel arrangement shown, each nested spiral contact region 1000 has its own electrical contact 1001 , 1002 .

[0098] like Fig.11 As shown, the temperature sensor 1100 can be seen as having a flat upper surface below which a thermistor type measuring device 1101 is positioned. The upper surface 1100 is bonded to and immediately surrounded by a diaphragm or rolling diaphragm 1102, the stepped edge of which is clamped and sealed between the underside of the cover 213 and the upper surface of the mount 201. This forms a watertight seal in the area of ​​the temperature sensor 1100. In a preferred embodiment, the cover 213 has a thin sheet metal top 1103 that is bent to cover the front edge 1104 of the cover 213, thereby complementing and forming a tight gap with an adjacent stainless steel grid or platform 1105 forming the upper surface of the removable drip tray. In this way, the flat periphery of the temperature sensor 1100 and the upper surface of the drip tray 103 form a discontinuous flat platform 104.

[0099] This is especially important in areas where pots are used.

[0100] Fig.11 It is also shown that in some embodiments, the processor 120 recognizes the pivoted orientation of the stick 102 and Fig.11 The particular orientation depicted in is interpreted as the "home" orientation. In the home orientation, the wand 102 can be operated and can also be cleaned when returned to this orientation. This orientation is characterized by the temperature sensor 1100 being slightly tilted from the vertical relative to the front of the user and the wand nozzle 1106 being located above the grid of the removable drip tray 103. In a preferred embodiment, the vertical height of the nozzle 1106 relative to the platform 1105 is pre-established in the home orientation to provide a manual operation result when the kettle is stable and in full contact with the temperature sensor 1100.

[0101] refer to Fig.11 , a milk steaming operation may be performed by placing the jug with milk and wand 102 in registration with the temperature sensor 1100 therein. In the optimal jug orientation, the jug is in face-to-face contact with the temperature sensor 1100. In this orientation, all three actuators of the tilt sensor will be equally depressed, and the processor 120 will interpret the resulting signal as an indication that the jug is present and in contact with the surface of the temperature sensor 1100. Steaming may continue until, for example, the temperature sensor 1100 indicates that the target temperature has been reached. If the jug is present or misaligned with the temperature sensor 1100, the processor 120 may inhibit cleaning.

[0102] However, the user may inadvertently place the kettle so that it does not make optimal surface contact with the temperature sensor 1100.

[0103] exist Fig.12An example of insufficient contact between a kettle 1200 and a temperature sensor 1201 is shown in . As shown, the metal kettle 1200 is in mechanical and thermal contact with the temperature sensor 1201, but it is not surface contact. Because the edge of the temperature sensor 1201 is actually rounded and the kettle 1200 is curved in the contact area, the kettle 1200 and the temperature sensor 1201 essentially form a point contact. Point contact is considered to be insufficient for such kettle temperature sensing. Activation of a single switch may have different results than when two switches are activated on the tilt sensor 1203.

[0104] exist Fig.13 In the correct steaming orientation shown, the kettle 1300 is located directly above and in contact with the surface of the temperature sensor 1303. The bottom of the kettle 1300 is flat against the platform 104. All three tilt switches 1301 have been activated. The steam nozzle 1302 is immersed in the kettle 1300 and is ready to discharge. The compression spring 216 is able to transmit sufficient force to the underside of the diaphragm 212 to drive the temperature sensor 1303 into contact with the underside of the kettle 1300.

[0105] like Fig.14 As shown, the processor 120 or the processor of the coffee machine 100 receives information in the form of electrical signals from a number of different components. Using this information, the processor 120 determines the operation of the steam wand 102. Typically, the processor 120 receives a water level signal from a water level sensor 1400 associated with an internal water tank 1401 of the device. The output of the water tank 1401 is detected and quantified by a flow meter 1402, providing a flow signal 1403 to the processor 120. After the flow meter 1402, a water pump 1404 controlled by the processor delivers the output of the water tank 1401. The water pump 1404 supplies a heater 1405. For example, the temperature within the heater 1405 is measured by a heater NTC thermal sensor 1406 and transmitted to the processor 120. The output of the heater 1405 is controlled by the processor 120 using a solenoid 1407. When solenoid 1407 allows steam to pass, the steam flows through venturi 1408 which receives air from processor controlled air pump 1409 and provides pressure information through transducer 1410 which provides pressure signal to processor 120. The steam / air mixture 1411 exiting the venturi is provided to steam wand 1412. Steam wand 1412 has a sensor 1413 associated therewith which provides steam wand or pivot orientation signal to processor 120. Steam wand 1412 is inserted into and heats the contents of milk jug 1414. Milk jug 1414 interacts with or contacts external temperature sensor assembly 106, for example, as disclosed. As previously described, sensor assembly 106 and processor 120 interact with, for example, external temperature sensor assembly 106. Figure 2The tilt sensor 1420 of one tilt sensor shown cooperates. A switch or tilt signal associated with the kettle tilt sensor and the detection sensor 1420 is provided to the processor 120.

[0106] Fig.15 How the output of a temperature sensor with a tilt or orientation detection mechanism is used in a milk steaming process is shown. As shown, the degree of tilt can cause the processor 120 to stop, modify or execute a different process. Fig.15 The process shown is performed by the device's processor 120 and ultimately results in milk that has been steamed manually or according to any one of a number of automatic steaming functions that the user may enable. As will be shown, tilting causes an alarm to be displayed and may cause a stored time limit to result in the end of the steaming operation.

[0107] Upon detecting a user input 1500 through the user interface 110 of the device (or otherwise), the processor 120 checks whether the steam wand 102 is in the downward or home orientation by detecting a signal provided by the wand position sensor 1501. If the wand 102 is in the downward state, the processor 120 counts how many of the above-mentioned tilt switches have been activated. It should be appreciated that virtually any number of switches may be used in a tilt switch of the type described herein. In this context, three switches may strike a good balance between cost and performance. If the tilt sensor fails to provide an output or the output indicates that only one switch has been contacted, the device enters an automatic timeout mode 1503, whereupon a first type of countdown determines the duration of the steaming operation. This countdown is to prevent overheating and may be based on factors such as temperature and remaining time. The processor 120 also causes the user interface 110 to display an alarm, notification or warning 1504. During this display, the machine 100 runs a stored profile 1505 that determines the characteristics of the steam and air provided to the wand 102. If back pressure or a blockage 1506 is detected, the operation of the steaming device stops 1507. If back pressure is detected and the operation stops, the processor 120 causes the interface 110 to provide a display indicating that the bar 102 is blocked or other alert 1520. If back pressure is not detected, the operation continues until the first timeout target is reached 1508. This causes the steaming operation to stop 1507. When the steaming operation stops, the processor 120 causes the interface to display an indication that the steaming operation has been completed 1510.

[0108] If two or more tilt switches have been activated, the processor 120 causes the machine 100 to enter the automatic temperature mode 1530. The processor 120 causes the display to indicate that the automatic temperature mode has been entered 1531. In this mode, there are no time limits other than the general safety timeout. In this mode 1532, the processor 120 runs the steam and air profile 1532. The processor 120 selects steam and air parameters consistent with the profile. If back pressure is detected 1533, the steaming operation stops 1507 and a blocking bar display is provided to the user 1520 through the interface. If back pressure is not detected but the safety timeout limit has been reached 1534, the steaming operation stops 1507 and the display of the user interface 110 is adjusted accordingly to indicate that the operation has stopped or the safety time limit has been reached. If the safety timeout target has not been reached but the target temperature has been reached 1545, the processor 120 stops the steaming operation 1546, and the display of the user caused by the processor 120 to show that the operation has been completed 1510.

[0109] like Fig.16 As shown, the device's temperature and orientation sensor 1600 can be used to provide temperature and orientation or tilt signals to the processor 120. Automatic temperature mode is defined as a mode in which the steam cycle begins after one or more physical parameters have been met, but once in automatic temperature mode, the user does not need to manually start the cycle by operating the user interface. It will be understood that the user interface 110 can display information related to the concept of automatic temperature mode, interruptions to automatic temperature mode, and parameters that may affect the start or stop of automatic temperature mode. These factors include the temperature sensed by the sensor 1600 being unsuitable for starting the automatic temperature mode, the orientation of the kettle being unsuitable, the steam wand 102 not being in the original position, or there being an obstruction in the steam line 1601. As shown Fig.16 It is suggested that the physical parameters required to initiate an automatic temperature mode or program include temperature and orientation signals from sensor 1600, signals provided by wand orientation switch or sensor 1602, and pressure or pressure blockage signals provided to processor 120 by pressure sensor 1603 located in steam supply line 1601 terminating at the end of steam wand 1604. Processor 120 may use these signals alone or in combination to send appropriate commands 1605 to operating components of the coffee making apparatus, and alone use signals 1606 associated with the display of information on user interface 110. Fig.16 In the example of FIG. 1 , the mechanical actuator 1607 contacts one or more switches 1602 , 130 , 131 for detecting the position of the steam wand and providing the resulting information signal to the processor 120 . Fig.17 Shows the use of Fig.16The temperature and orientation sensor 1600 or another form of temperature or orientation sensor depicted in the method of initiating and maintaining an automatic temperature steaming operation.

[0110] like Fig.17 As shown, the espresso machine 100 with the steam wand 102 can be operated in automatic temperature mode. The automatic temperature mode is essentially a non-manual mode in which steamed milk in a pot is placed on the platform 104 to achieve the desired texture and temperature. In this mode, the steaming operation begins once certain physical requirements are met. The satisfaction of these requirements is detected by one or more sensors, which provide information to the processor 120, which controls the subsequent start, maintenance and stop of the steaming operation. The automatic temperature mode operation begins at 1700, and the user selects the steam and air distribution by utilizing the user interface 110 of the device. A simplified steam and air distribution is a cappuccino style milk foam distribution. This includes, for example, steaming at 100% power for only three seconds, followed by a frothing phase, in which steam is supplied at 70% power, while air is also introduced into the steam line (from the air pump) at 100% power for 30 seconds, followed by a mixing phase, in which steam is supplied at 100% power without air until a pre-set target temperature is reached. In contrast, a latte-style milk froth steaming profile includes a hot stage where steam is supplied at 100 percent power for three seconds, followed by a frothing phase where steam is supplied at 70 percent power and air is supplied at 100 percent power for (e.g.) fifteen seconds, followed by a mixing phase where steam is supplied at 100 percent power only until the target temperature is reached. The user selection of the steam and air profile places the machine in a recipe standby mode 1701. In this mode, the user interface 110 displays the selected profile and optionally displays a second indication that it is in standby mode. When in the recipe standby state 1701, the processor 120 looks for a rod position switch or sensor 1602, 130, 131 that will provide a rod down signal 1702. If the rod 102 is not in its fully down or home position, the processor 120 reverts to manual mode 1703 and displays an appropriate indication on the user interface 110. If the rod 102 is down, the processor 120 then senses how many tilt switches (e.g. 600, 700, 800) have been activated 1704. If only one switch has been activated, the steaming operation is not started and the user interface 110 displays that the automatic temperature mode is not available 1705. If two or more switches have been activated, the automatic temperature mode is operated 1706. Optionally, the processor 120 can determine whether the temperature sensor 202 has detected a temperature change (from the environment). If the temperature sensor 202 working with the processor 120 does not detect a temperature change due to the presence of the kettle, the machine 100 optionally displays that the automatic temperature mode is not available and provides an appropriate display on the user interface 1705.

[0111] In the event that the automatic temperature mode has been started 1706, an appropriate display 1707 is created to alert the user that the automatic temperature mode is activated. Thereafter, the processor 120 calls and runs the selected steam and air profile 1708 previously requested by the user 1700. Once steam begins to flow through the steam supply line, the optional pressure sensor 1603 can provide a signal to the processor 120 to indicate that there is a blockage in the steam line 1709. If back pressure is detected in the pressure line, the steaming operation is stopped 1710, and the processor 120 causes the user interface 110 to display an indication of a steam line blockage 1711. If there is no harmful back pressure, the processor 120 can optionally compare the actual operating time of the automatic temperature mode and compare it to a pre-set safety timeout target 1712. The safety target prevents undesirable overheating of the milk. If the safety timeout target has not been reached, the processor 120 determines the milk temperature using the reading of the temperature sensor 202. As a result of the temperature measurement and comparison 1713, the operation either continues 1708 or stops 1714. If the operation is stopped due to reaching the temperature target, an appropriate display is created on the user interface 1715, and a new steaming operation cannot be automatically started until the processor 120 detects that the wand 102 has been raised to its fully extended position, indicating a reset of the steaming cycle 1716. Fig.17 As further shown, reaching the safety timeout target 1712 results in stopping the automatic temperature mode operation 1720. This is accompanied by an appropriate display on the user interface 1721 requiring the wand 102 to be raised to its uppermost position to reset and thereby restart the steaming operation 1722.

[0112] Thus, the processor 120 may perform automatic actuation of a milk texturizing cycle when the processor 120 detects a satisfactorily oriented jug (optionally, a second detection signal, regarding the presence of cold milk, and optionally, a third detection signal, indicating that the wand 102 is immersed, down, or in a home or texturizing position) using the temperature sensor 202. The processor 120 may be programmably controlled to non-manually begin a texturizing operation without further user input when a combination of automatic actuation parameters are present. The combination may include any two or more signals, including jug orientation, temperature, and wand 102 position. Any of the signal types may include a preset or user programmable threshold or signal range that satisfies the processor actuation operation to automatically begin a texturizing cycle. As an example, a satisfactory orientation signal may include a specific switch, multiple switches, or a specific switch area or multiple specific switch areas being contacted. The same is true for a temperature set point or temperature range. The interface may provide further functionality, wherein the user may be prompted to initiate or interrupt an automatic texturizing operation performed by the processor 120 based on satisfying the actuation parameters. This may be in the form of an audio or graphical alert depicted on the user interface 110 and instructions for the user to initiate or interrupt if the user desires.

[0113] Although the technology has been described with reference to specific examples, it will be appreciated by those skilled in the art that the technology may be embodied in many other forms.

[0114] As used herein, unless otherwise indicated, the use of ordinal adjectives "first," "second," "third," etc. to describe common objects merely indicates that different instances of similar objects are referenced and does not mean that the objects so described are necessarily in a given order, temporally, spatially, sequentially, or in any other manner.

[0115] References throughout this specification to "one embodiment" or "an embodiment" or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment is included in at least one embodiment of the present technology. Thus, the phrases "in one embodiment" or "in an example" that appear in various places throughout this specification do not necessarily all refer to the same embodiment or example, but may be the same embodiment or example. Furthermore, in one or more embodiments, the particular features, structures, or characteristics may be combined in any suitable manner, as will be apparent to one of ordinary skill in the art.

[0116] Similarly, it should be understood that in the above description of exemplary embodiments of the present technology, various features of the present technology are sometimes combined in a single embodiment, figure, or description thereof for the purpose of simplifying the content of the present disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting the intention that the claimed technology requires more features than those expressly recited in each claim. On the contrary, as reflected in the following claims, the inventive aspects lie in less than all the features of a single preceding disclosed embodiment. Any claims following the specific embodiment are hereby expressly incorporated into the specific embodiment, with each claim itself as a separate embodiment of the technology.

[0117] Unless otherwise specifically noted, it will be apparent from the following discussion that it should be understood that throughout the specification, discussions utilizing terms such as "processing," "computing," "calculating," "determining," etc., refer to the actions and / or processes of a microprocessor, controller or computing system or similar electronic computing or signal processing device that manipulates and / or transforms data.

[0118] Furthermore, although some embodiments described herein include some features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present technology and form different embodiments, as understood by those skilled in the art. For example, in the claims below, any of the claimed embodiments may be used in any combination.

[0119] Therefore, while there has been described what are considered to be preferred embodiments of the present technology, those skilled in the art will recognize that other and further modifications may be made thereto without departing from the scope of the present technology, and it is intended that all such changes and modifications be included within the scope of the present technology.

[0120] While the present technology has been disclosed with reference to specific details of construction, it should be understood that these techniques are provided by way of example and not limitation on the scope of the present technology.

Claims

1. A method of operating a coffee machine, the coffee machine comprising a processor operably associated with a plurality of actuators, wherein the method is performed by the processor and comprises the following steps: Count the number of actuators that are activated when the bottom surface of the milk steamer is in contact with the platform; determining the presence or orientation of a milk steamer based on the counted number of activated actuators; and An operating mode of the coffee machine is controlled based on the determined presence or orientation of the milk steamer.

2. The method of claim 1, wherein the operating modes of the coffee machine include an automatic temperature mode and an automatic timeout mode.

3. The method of claim 2, wherein the coffee machine enters an automatic temperature mode when two or more actuators are activated, and the method further comprises the step of displaying an indication on a user interface of the coffee machine that the coffee machine has entered the automatic temperature mode.

4. The method according to claim 3, further comprising the steps of: selecting one or more parameters related to steam and air distribution; and A steaming operation of the coffee machine is enabled based on the selected one or more parameters.

5. The method according to claim 4, further comprising the steps of: Detecting whether back pressure exists in a steam wand of the coffee machine.

6. The method of claim 5, wherein steaming operation is disabled based on detecting the presence of back pressure, and wherein the method further comprises the step of displaying an indication on a user interface of the coffee machine that the steam wand is blocked.

7. The method of claim 5, wherein the steaming operation is continued based on detecting the absence of back pressure, and the steaming operation continues until a safety timeout limit is reached, wherein the method further comprises the step of disabling the steaming operation when the safety timeout limit is reached.

8. The method according to claim 4, further comprising the steps of: A steaming operation of the coffee machine is disabled when the target temperature is reached.

9. The method according to claim 7 or 8, further comprising the following steps: An indication is displayed on a user interface of the coffee machine that the coffee machine has completed the steaming operation.

10. The method of claim 2, wherein the coffee machine enters an automatic timeout mode when one actuator is activated or when none of the actuators are activated, and further comprising the step of displaying an indication on a user interface of the coffee machine that the coffee machine has entered the automatic timeout mode.

11. The method according to claim 10, further comprising the steps of: enabling a countdown to determine the duration of a steaming operation of the coffee machine; Starting a steaming operation of the coffee machine; and a stored profile of steam and / or air characteristics for operating a steam wand of the coffee machine, The countdown is based on one or more parameters including temperature and remaining time.

12. The method according to claim 11, further comprising the steps of: Detecting whether back pressure exists in a steam wand of the coffee machine.

13. The method of claim 12, wherein steaming operation is disabled based on detecting the presence of back pressure, and wherein the method further comprises the step of displaying an indication on a user interface of the coffee machine that the steam wand is blocked.

14. The method of claim 12, wherein the steaming operation is continued based on detecting the absence of back pressure, and the steaming operation continues until a first timeout target duration is reached, and wherein the method further comprises the step of disabling the steaming operation when the first timeout target duration is reached.

15. The method according to claim 14, further comprising the steps of: An indication is displayed on a user interface of the coffee machine that the coffee machine has completed the steaming operation.

16. The method of claim 1, wherein the plurality of actuators comprises tilt switches.

17. A coffee machine having a processor, wherein the processor is configured to perform the method according to any one of claims 1 to 16.

18. A system for making coffee, the system comprising a coffee machine having a processor, wherein the processor is configured to perform the method according to any one of claims 1 to 16.

19. A method of operating a coffee machine having a processor operably associated with a plurality of actuators and a steam wand, wherein the method is performed by the processor and comprises the steps of: receiving user input indicating steam and air distribution; enabling a standby mode of the coffee machine based on the received user input; Determine the steam wand's home position; Count the number of actuators that are activated when the bottom surface of the milk steamer is in contact with the platform; determining the presence or orientation of a milk steamer based on the counted number of activated actuators; An operating mode of the coffee machine is controlled based on the determined presence or orientation of the milk steamer.

20. The method of claim 19, wherein the coffee maker enters an automatic temperature mode when two or more actuators are activated, and further comprising the step of displaying an indication on a user interface of the coffee maker that the coffee maker has entered the automatic temperature mode.

21. The method according to claim 20, further comprising the steps of: The steam and air distribution is operated based on the received user input.

22. The method according to claim 21, further comprising the steps of: Detect whether back pressure exists in the steam wand.

23. The method of claim 22, wherein steaming operation of the coffee machine is disabled based on detecting the presence of back pressure, and the method further comprises the step of displaying an indication on a user interface of the coffee machine that the steam wand is blocked.

24. The method of claim 19, wherein the steaming operation is continued based on detecting the absence of back pressure, and the method further comprises the steps of: comparing the actual operating time of the automatic temperature mode to a predetermined safety timeout target; and Detect milk temperature based on actual run time compared to safety timeout target, Steaming operation is continued or disabled based on a comparison of actual run time and safety timeout target with the sensed milk temperature.

25. The method according to claim 24, further comprising the steps of: An indication is displayed on the user interface of the coffee machine that a new steaming operation cannot be automatically initiated until the steam wand is moved to the extended position.

26. The method of claim 20, wherein steaming operation is disabled when a safety timeout target is reached, and the method further comprises the step of displaying an indication on a user interface of the coffee machine that the steam wand needs to be moved to an extended position.

27. The method of claim 19, wherein steaming operation of the coffee machine is disabled when one actuator is activated or none of the actuators are activated, and the method further comprises the step of displaying an indication on a user interface of the coffee machine that steaming operation is disabled and / or automatic temperature mode is unavailable.

28. The method according to claim 19, further comprising the steps of: Detect temperature changes in ambient temperature; and If no temperature change is detected, an indication is displayed on the user interface of the coffee machine that steaming operation is disabled and / or the automatic temperature mode is not available.

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