CN102187292A - Liquid heating vessel and control - Google Patents

Liquid heating vessel and control Download PDF

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Publication number
CN102187292A
CN102187292A CN200880124266XA CN200880124266A CN102187292A CN 102187292 A CN102187292 A CN 102187292A CN 200880124266X A CN200880124266X A CN 200880124266XA CN 200880124266 A CN200880124266 A CN 200880124266A CN 102187292 A CN102187292 A CN 102187292A
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CN
China
Prior art keywords
liquid
heating
heating vessel
detect
level
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN200880124266XA
Other languages
Chinese (zh)
Inventor
杰里米·西登斯
罗伯特·亨利·哈德菲尔德
彼得·哈勒姆·赖特
安东尼奥·马丁·加埃塔
戴维·安德鲁·史密斯
罗宾·基思·摩尔
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ferro Techniek Holding BV
Original Assignee
Otter Controls Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GB0721858A external-priority patent/GB2448009A/en
Priority claimed from PCT/GB2008/001102 external-priority patent/WO2008119966A2/en
Priority claimed from GBGB0808483.2A external-priority patent/GB0808483D0/en
Priority claimed from PCT/GB2008/002073 external-priority patent/WO2008155538A2/en
Priority claimed from GBGB0817907.9A external-priority patent/GB0817907D0/en
Application filed by Otter Controls Ltd filed Critical Otter Controls Ltd
Publication of CN102187292A publication Critical patent/CN102187292A/en
Pending legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/21—Water-boiling vessels, e.g. kettles
    • A47J27/21008—Water-boiling vessels, e.g. kettles electrically heated
    • A47J27/21058—Control devices to avoid overheating, i.e. "dry" boiling, or to detect boiling of the water
    • A47J27/21091—Control devices to avoid overheating, i.e. "dry" boiling, or to detect boiling of the water of electronic type
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/21—Water-boiling vessels, e.g. kettles
    • A47J27/21008—Water-boiling vessels, e.g. kettles electrically heated
    • A47J27/21041—Water-boiling vessels, e.g. kettles electrically heated with heating elements arranged outside the water vessel
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/21—Water-boiling vessels, e.g. kettles
    • A47J27/21008—Water-boiling vessels, e.g. kettles electrically heated
    • A47J27/2105—Water-boiling vessels, e.g. kettles electrically heated of the cordless type, i.e. whereby the water vessel can be plugged into an electrically-powered base element
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/21—Water-boiling vessels, e.g. kettles
    • A47J27/21008—Water-boiling vessels, e.g. kettles electrically heated
    • A47J27/21058—Control devices to avoid overheating, i.e. "dry" boiling, or to detect boiling of the water
    • A47J27/21066—Details concerning the mounting thereof in or on the water boiling vessel
    • A47J27/21075—Details concerning the mounting thereof in or on the water boiling vessel relating to the boiling sensor or to the channels conducting the steam thereto
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/21—Water-boiling vessels, e.g. kettles
    • A47J27/21166—Constructional details or accessories
    • A47J27/21175—Covers
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00—Parts, details or accessories of cooking-vessels
    • A47J36/06—Lids or covers for cooking-vessels
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/1919—Control of temperature characterised by the use of electric means characterised by the type of controller
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/27—Control of temperature characterised by the use of electric means with sensing element responsive to radiation

Abstract

The invention discloses a liquid heating vessel and a conrol device. The liquid heating vessel includes the electronic control device which is set to dectecting the boiling condition of liquid through measuring the perturbance of the liquid in the vessel.

Description

Heating vessel and control device
Technical field
The present invention relates to electrically powered liquid heating container and the electronic-controlled installation that is used for described electrically powered liquid heating container.
Background technology
Electrically powered liquid heating container such as kettle typically comprises one or more control device (for example, being used for responding the boiling control device of boiling condition) and is used to respond the wherein dry combustion method control device of the overheat condition of equipment no liquid.Typically, these control device are electromechanical, and comprise one or more thermal actuators and switch.The manufacturing of motor machine control device is cheap and reliable usually, but its function limitation.
As another alternatives of motor machine control device, proposed to add electronic-controlled installation such as the electronic controller of microprocessor and one or more electricity or electronic sensor.Early stage scheme comprises applicant's oneself patent publications GB-A-2185161 and GB-A-2228634.
The problem that electronic-controlled installation solves is that boiling detects.The motor machine control device generally includes steam pipe, and it is used for steam is conveyed into control device from the surface of wanting heated liquid, and wherein: steam can trigger thermal actuator.Yet, to collect the steam above the liquid surface and making described steam when steam pipe is moved down into thermal actuator, there is delay in this.In addition, be bound to leave significantly " head space " above liquid, to allow to collect steam, this causes the interior existence of kettle can't be used for the wasting space of receiving fluids.In addition, steam is directed into control device, and this can cause the problem of electric aspect.
Usually the boiling of not expected delay detects, because its is wasted energy and causes unnecessary concentrated condensation.In addition, need " head space " fully for avoiding boiling liquid to sputter container, this is actual to be the interior wasting space of equipment.
In many application, only need heating liquid up to boiling, and in fact need not make any tangible a period of time of liquid boiling.In other is used, for example there is the situation of quality problem, may expect to prolong the water boiling time.In the electrical heating cooking container, may expect to have " simmering " and be provided with, thereby liquid just remains on boiling point, rather than violent boiling.Another problem that electronic-controlled installation will solve is that target temperature is arranged on below the boiling point of liquid.A potential advantage of electronic-controlled installation is that the user can change target temperature.Can be by at when boiling correcting sensor, and to sensor output is carried out interpolation and is detected Asia-boiling temperature to detect predetermined Asia-boiling temperature.Yet for example because atmospheric pressure reduces the boiling point reduction, the calibration out of true will cause detecting the inaccurate of predetermined Asia-boiling temperature when boiling.
In addition, may expect that electronic-controlled installation can accurately determine liquid level in the container.
In addition, may expect: in container body, do not need thermistor or, just can determine the temperature of liquid, or detect and seethe with excitement or simmer even with providing under the situation of any temperature sensor.
Summary of the invention
According to an aspect of the present invention, provide boiling in a kind of tracer liquid heating container or the method that simmers, may further comprise the steps: the disturbance on the surface of tracer liquid or disorder; With in response to for simmering or the described detected disturbance or the disorder of the feature of the condition of seething with excitement, detect boiling or simmer.The water level or the angle fluctuation that can pass through at least a portion on tracer liquid surface detect disturbance or disorder.By with electromagnetic radiation to the described part on surface and detect the reflection fluctuation of electromagnetic radiation from the surface, fluctuation that can detection angles.
According to another aspect of the present invention, provide a kind of method of controlling the boiling of the liquid in the electrically powered liquid heating container, wherein: with after simmering liquid, regulate the heating power level in boiling.
According to another aspect of the present invention, provide a kind of level sensor that is used for heating vessel, thereby comprised and be used for launching signal into the device of liquid and be used to detect from the signal of the surface reflection of liquid and determine the device of the water level on surface.Transmitting by measurement arrives detecting device institute spended time after the surface reflection, can determine water level.Alternatively, this signal can be launched with the angle with surface tilt, and can determine water level by the amplitude of detected reflectance signal.Alternatively, the frequency of this signal can change, and the resonant frequency of the big quantity of fluid in can detection receptacle, can draw water level thus.This signal can be the electromagnetic signal such as light signal, or such as the vibration signal of ultrasonic signal.
This ultrasonic signal can be launched by transducer.This ultrasonic transducer can be included in the element board in the container base, and described element board has the heating element that is arranged on the downside.Electric signal under the ultrasonic frequency can be applied to the piezoelectric transducer of the downside of element board, or is applied to heating element itself; Be applied in the situation of heating element itself at electric signal, the interaction between electric signal and the magnetic field of the earth can produce ultrasound wave in liquid.
The ultrasonic vibration of this element board can have other independent advantages, so they are described as following independent aspects of the present invention.
According to another aspect of the present invention, provide a kind of element board that is used for heating vessel, described element board comprises: the device that is used to cause the ultrasonic vibration of element board.The incrusted deposit that this ultrasonic vibration can prevent from during heating also to produce is on heating element.Therefore, can respond to ultrasonic vibration during heating operation.
According to another aspect of the present invention, provide the method for the incrusted deposit thing on the element board that a kind of detection is used for heating vessel, may further comprise the steps: make element board under the specified resonant frequency of described element board, produce ultrasonic vibration; Detect the amplitude of vibration; And the existence of determining the incrusted deposit thing by the amplitude of vibration.
Description of drawings
Now with reference to figure below embodiments of the invention are described.
Fig. 1 is the synoptic diagram of the heating vessel in the embodiments of the invention;
Fig. 2 is the vertical view of the separating component in the embodiments of the invention, and described separating component comprises: the integrated wireless connector; Power supply/switching motherboard with electronic-controlled installation;
Fig. 3 is the skeleton view of parts of Fig. 2 that is positioned at the base portion part of kettle;
Fig. 4 is the vertical view of element board that is used to be connected to the parts of Fig. 2;
Fig. 5 is the skeleton view of the element board of installing in the base portion part of the parts top of Fig. 2;
Fig. 6 is the vertical cross-section at the center of element board, parts and base portion part through Fig. 5;
Fig. 7 is the vertical view of the user interface of electronic-controlled installation;
Fig. 8 is the excision view of the user interface of installing in the kettle handle;
Fig. 9 a is the circuit diagram of electronic-controlled installation according to an embodiment of the invention to 9d;
Figure 10 is the synoptic diagram that uses the level sensor of ultrasonic transducer in another embodiment of the present invention;
Figure 11 is the synoptic diagram of the level sensor of service range measurement mechanism in another embodiment;
Figure 12 is the synoptic diagram that comprises the heating vessel of force transducer in another embodiment of the present invention;
Figure 13 is the synoptic diagram that comprises the sensing heating liquid heating container of force transducer in another embodiment of the present invention;
Figure 14 is the synoptic diagram that comprises the heating vessel of optics boiling sensor in another embodiment of the present invention;
Figure 15 is the synoptic diagram that comprises the heating vessel of optics boiling detecting device in another embodiment of the present invention;
Figure 16 is the synoptic diagram that comprises the heating vessel of optics boiling detecting device in another embodiment of the present invention;
Figure 17 is the synoptic diagram that comprises the heating vessel of optics boiling detecting device in another embodiment of the present invention; With
Figure 18 be in an embodiment of the present invention the IR sensor voltage with respect to the curve of time.
Embodiment
The kettle summary
Fig. 1 has schematically shown the kettle with electronic-controlled installation, as the example of the applicable heating vessel of the present invention.In this example, kettle is wireless kettle, comprising: container body 1; With power base 2, described power base have corresponding main body and base portion wireless connector 3 and 4 (for example, in patent publications WO-A-94/06185, describe and/or as the label CS4/CS7 (power base socket) that sells by Otter ControlsLtd. and CP7 (equipment plug) 360 spend the wireless connector types).This power base can be connected to the supply socket (not shown) by power lead 13.
This container body 1 comprises: be used to hold the reservoir 5 with heated water; With base portion part 6, and the mouth of pipe 7, lid 8 and handle 9.The 12 pairs of water of element board that form the base portion of reservoir 5 heat, and comprise: at the heating element of downside (that is, towards base portion part 6).Use Easifix (RTM) accessory of describing as among the WO 99/17645, this element board 12 can be installed in the container body.This element can comprise sheathe element and/or thick film element.Preferably, this element board is made of stainless steel.More preferably, this element board is substantially as described in the WO 06/83162.Yet at least some embodiment of the present invention can be applicable to have the heating vessel that immerses heating element rather than element board.
As will be described in greater detail below, this base portion partly comprises the electronic-controlled installation 10 of the duty that is used to control container.User interface 11 allows user's process container, and the demonstration of the duty of container can be provided.This control electronic installation can undesirably be separated between user interface 11 and control device 10.
Sensor 14 is arranged with the water temperature in the process element board 12 sensing reservoirs 5, and preferably isolates with heating element heat.In this example, as will be discussed in more detail below,, therefore do not deliver a vapor to the steam pipe of controller 10 from the top of reservoir 5 owing to detect boiling from the input of temperature sensor 14 rather than by sensing steam.In more following embodiment, utilize temperature sensing mode in addition to detect boiling, make to need not sensor 14.
This container can have one or more additional features, and some in the described feature will be described in greater detail below.Yet for avoiding repetition, some in these features will here be summarized.
The other Heating Characteristics of this container can comprise " insulation " feature, and wherein: preferably after boiling, liquid remains near the predetermined temperature; This can realize by intermittently starting main heating element or intermittence or starting secondary heating element continuously.This predetermined temperature can be just below boiling point, or such as 80 ℃ more low temperature, and can select by the user.
Another Heating Characteristics is Asia-boil feature, and wherein: liquid is heated to the following predetermined temperature of boiling (for example, make coffee 80 ℃), and cuts off then or reduce heating power, for example to start the insulation pattern.This predetermined temperature can be selected by the user.
Another Heating Characteristics is the prolongation boil feature, thereby: liquid is heated to boiling, and seethes with excitement then the schedule time (for example, 30 seconds to 2 minutes) at least, so that liquid is carried out disinfection.
The electronic-controlled installation details
Fig. 2 to 8 be presented at different installation phases the specific embodiment of control device 10.Fig. 2 has shown power supply and switching motherboard 22, and electric capacity 21 and relay 23 are installed on described power supply and the switching motherboard with control linkage device 27.Switching motherboard 22 is installed on the metal underframe 20, and wireless connector 3 also is installed on the described metal underframe.Adopt this mode, wireless connector 3 integrates with plate 22, so that integrated component to be provided.
Fig. 3 has shown the underframe 20 in base portion part 6 of being installed in that is reversed.The opposition side support spring connector of this underframe 20, described spring connector comprises: three power connectors 24; Temperature sensor connector 25; With overheat sensor connector 26.As shown in Figure 4, this element board 12 has: corresponding power supply connection gasket 24 '; Temperature sensor connection gasket 25 '; With overheat sensor connector 26 ', as illustrated in Figures 5 and 6, when element board 12 was positioned on the underframe 20, described sensor connector and corresponding connector electrically contacted.
This element board 12 also comprises temperature sensor installation pad 28, and temperature sensor 14 (showing with dotted line among Fig. 4) is connected to described temperature sensor pad is installed.This temperature sensor 14 is positioned in the central part of the element board 12 that does not have thick film heating track, and make: though some heat are transmitted to sensor 14 from heating track on every side through element board 12, the temperature that senses is near the temperature of water between the period of heating.This element board 12 preferably includes: stainless steel substrate; Be deposited on top insulation course with the heating track.This temperature sensor 14 preferably includes the NTC thermistor.
This element board 12 comprises: high power heating track 29; With low-power heating track 30, described high power heating track and described low-power heating track can be via the height that separates and low-power connection gasket 24 ' switchings independently.When 240VAC, this high power track 29 is considered to be 2073W, and the low-power track is considered to be 1027W, thereby when two track parallel powerings, provides the peak power of 3.1kW.
This overheat sensor connector 26 ' be used to detects the leakage current of the overheated condition of expression element board 12, such as WO 06/83162 description.Therefore, this control device 10 can detect dry-fire condition and/or incrusted deposit.
Fig. 7 has shown the user interface 11 among this embodiment, and described user interface can be connected to control linkage device 27 on power supply and the switching motherboard 22 by umbilical cable 32.This customer interface portion comprises the activatable button 34 of user, LCD display 36 and luminecent connector 38 and audio connector 40.As shown in Figure 8, this user interface 11 can be arranged in the handle 9, and make: the user can easily use display 36 and button 4.
This user interface 11 comprises microprocessor, and described microprocessor is arranged with the user control of response by button 34, utilizes the operation of power supply and switching motherboard 22 control containers.This microprocessor is also controlled display 36, and via luminecent connector 38 control illumination effects with via the audio connector control audio.
This user interface 11 is installed movably, makes: described position or the structure that is used for the interface can change to be fit to the user.For example, these display 36 rotors and/or rotatable make: when container body 1 separates or is connected with base portion 2, can more easily see described display.This display 36 can pivot around the approximate vertical axis, and is installed on the lid or upper surface of container, can be configured for left hand or right-hand operated.
The electronic-controlled installation circuit diagram
Fig. 9 a is the circuit diagram of power supply and switching motherboard 22, has shown being connected of relay 23 and power connector 24.This electric capacity 21 forms from the part of main AC power supplies at the power supply of the low dc voltage of control linkage device 37 supplies.
Fig. 9 b is the circuit diagram of interface circuit, and the voltage that described interface circuit is used to provide required is to drive relay 23 and luminecent connector 38.Though this interface circuit can be positioned in the base portion part 6 alternatively, this interface circuit forms the part of user interface 11.
Fig. 9 c is microprocessor and the circuit diagram that be connected of temperature sensor with the overheat sensor input.This figure has also shown the connection of the actuatable button 34 of user.Fig. 9 d is the circuit diagram that is used to drive the LCD driving circuit of LCD display 36.
This microprocessor comprises program storage, and as following description, one or more control programs are stored in the described program storage, are used to carry out one or more control function.This control program can be stored in the program storage during manufacture.In one embodiment, this control program is stored in the flash memory, and can upgrade via the interface of microprocessor and/or program storage.This interface can be the external interface such as USB port, so that program and/or data are transferred to control device.This external interface can be the wave point such as bluetooth (RTM) interface.
This control device is arranged, and makes: the high-tension circuit such as power supply and relay is formed in the base portion part near element board 12 and wireless connector 3.On the contrary, this Low-voltage Electronic circuit forms the part away from the user interface part of element board 12.This Low-voltage Electronic circuit is easier to be heated and to make moist, so preferably described Low-voltage Electronic circuit is positioned to away from base portion part 6.
In optional embodiment, the power switch parts of control device are arranged in power base 2 at least, and via wireless connector 3,4 controls.For example, this control device can send action of low-voltage pulse on the grounding pin of wireless connector 3, and described grounding pin gauge tap is with conversion electric power.Adopt this mode, can simplify the signal transmission between container body 1 and the wireless base portion 2.As another advantage, the power switch parts can further be removed from steering logic, make: reduced the risk of disturbing.
In an optional embodiment, can be for example be transmitted in wireless communication data and/or signal between main body 1 and the base portion 2 via infrared, optics or RF signal.In the situation of infrared or optical signal transmission, as schematically showing among Figure 10, one of main body 1 and/or base portion 2 can comprise the circular light guiding element 2a concentric with wireless connector, and corresponding infrared transmitter and/or receiver 1a are in identical radius, make: the relative orientation of tube body 1 on base portion 2 not, can communicate by letter.
In optional embodiment, be used for that principal voltage is converted to the power supply that hangs down dc voltage and be set at power base 2, and wireless connector 3,4 all provides electrical connection for principal voltage with than low dc voltage.This low dc voltage can connect (for example, disclosed in No. the 2228634th, applicant's BrP) via the other terminal in the wireless connector.For example, 5 terminals can be arranged: the live wire of each principal voltage and low-voltage and zero terminal and ground terminal.
Accessory power supply
Power supply such as battery or electric capacity can be arranged in the container body 1, being power electronics when container body 1 when power base 2 removes.Preferably, this power supply is chargeable, and is recharged when container body 1 is connected to power base 2.In addition or alternatively, when container body was not connected to power base 2, this power supply can for example be recharged by the photoelectric panel on the container body 1.Alternatively, this power supply can be non-rechargeabel, for example is rechargeable battery not.
This power supply can keep the state of at least some parts of electronic-controlled installation 10, and can be enough to be other luminous or following effect power supply.Preferably, when container body 1 when power base removes, user-operable user interface 11 is for example to change such as control setting and/or luminous setting.This user interface 11 can adopt demo mode operation, the non-Heating Characteristics of Presentation Container with in container does not insert main body the time.In this case, this container should preferably can for example utilize photoelectric panel to charge under not main situation about connecting, and perhaps power supply should be renewable.
Ready mode
For power saving, when container body 1 separated above predetermined space with base portion 2, this electronic-controlled installation 10 can enter ready mode.In ready mode,, can reduce power consumption by closing illumination and/or the feature of user interface 11 being lost efficacy.Response be reconnected to base portion 2 and/or response via the user of user interface control and/or response such as other input from user's proximity sensor, this container body 1 can leave ready mode.
Alternatively or in addition, when container body 1 separated with base portion 2, electronic-controlled installation 10 can enter the pattern that is not low electric source modes, but expectation encourages the user that container body 1 refitting is placed on the base portion 2.For example, but the charge level of the power supply in these control device 10 detection receptacle main bodys 1, and when charge level is lower than predeterminated level, send alarm to the user.Alternatively, when container body 1 separated above predetermined space with base portion part 2, this control device 10 can be alarmed to the user, and to guarantee: this container body 1 is not misplaced or is unavailable when the user wants to use container next time.
Override mode
Usually be configured to after startup, reset fast such as the bimetallic mechanical pick-up device of snap action; For example, the thermometal that is used as the dry combustion method sensor typically is configured to and the good thermo-contact of element board, and up to startup, at this some place, the quick disengaging of thermometal contacts with element board, and therefore can cool off fast and reset.Thermometal as vapor sensor can be disposed in the vaporium, or the outlet of contiguous steam pipe is arranged.When vapor sensor is activated, no longer produce steam, and therefore sensor quantity of steam on every side reduces fast; Therefore, sensor cools off fast and resets.
In some embodiments of the invention, this sensor 14 is electricity or electronic sensor, and when detecting target temperature or dry fire condition, can not break away from the thermo-contact with element board 12.Therefore, be different from the quick cooling of mechanical pick-up device, because the thermal inertia of element board 12, after cutting off or reducing power supply to element board 12, the temperature that senses keeps higher and continues some times.
In some cases, when the temperature that senses is still on target temperature, desirably make the user recover power supply, for example to force the liquid in the reservoir 5 to seethe with excitement again to equipment.When the temperature that senses was still above target temperature, these control device 10 response users startups entered override mode, to reheat liquid.In override mode, this control device 10 is opened or is increased heating power and continues the schedule time (for example, 10 seconds), and closes then or reduce power.This override mode also has the advantage of guaranteeing that again user's container is still worked; Otherwise, think that for user's possible errors of resetting the fast ground that adapts to manual sensor container has been out of order.
Volume/water level detecting
Can utilize following manner to detect the volume or the water level of the water in the reservoir 5.In one embodiment, as shown in figure 10, liquid level is by ultrasonic transducer 48 sensings that are connected to element board 12.The surface of liquid is left in the ultrasonic pulse reflection, and is detected by transducer 48.This control device 10 is measured pulse the time that the surface is spent is left in reflection, thereby and the distance of gauging surface and element board 12, and therefore calculate liquid level.Alternatively, this transducer 48 can be positioned at the water surface top, is for example covering in 8 or contiguous described lid, thereby and determine the surface water plane, and be used to calculate liquid level.
In optional embodiment, this control device 10 changes the frequency of ultrasonic transducer, and the amplitude of the reflected signal of definite different frequency, and therefore determines resonant frequency or a plurality of frequency.Hyperacoustic reflection between this element board 12 and the surface will be determined the resonant frequency in the liquid, and described resonant frequency has the wavelength as the function of the distance between surface and the element board.The velocity of sound in the water is about 1500m/s, so the above frequency of 20kHz will have the wavelength of 7.5cm, and this can compare with the depth of water in the kettle.Therefore, this control device 10 draws liquid level from resonant frequency or a plurality of frequency.
This resonant frequency can be the part or all of resonant frequency of container body 1 alternatively, for example, and the resonant frequency of wall.The amplitude of this resonance will be decayed according to the volume of the water in the container.Therefore, in optional embodiment, frequency of ultrasonic is fixed, and the amplitude of resonance is detected to determine water level or volume.As the possibility of ultrasonic transducer, the electric signal under ultrasonic frequency can pass through thermal element itself, or through the separately track on the element board; Electric signal and magnetic field of the earth interact, to produce ultrasonic vibration in element board.Find: the 50Hz principal current can cause the audio frequency vibration of element board through thick film element; This effect by the trouble using the ultrasonic signal utilization to be considered to usually will to be avoided in the present embodiment.
As the possibility of ultrasonic signal, can use electromagnetic signal such as light signal; This light can be laser.This electromagnetic signal short pulse or series of pulses the most is launched, and its reflection is left liquid surface and detected by photodetector.Use can be measured the flight time such as the legacy device that uses in the laser distance instrument, and is used to calculate liquid level.
In one embodiment, as shown in figure 11, distance-measuring device 48 is positioned at or centers on the top of reservoir 5.This device can be laser or ultrasonic distance measurement mechanism.This distance-measuring device 48 can be positioned on the central vertical axis of reservoir 5 substantially, and make: the precision of the accurate measured value of water level does not depend on vertical container body 1.Alternatively, a plurality of distance-measuring devices can be set, with the angle of compensation vessel main body 1 in different positions.When container body 1 remained on the angle place easily, distance-measuring device (one or more) can be used for accurately measuring the water level during water swivel is filled.Alternatively, distance-measuring device can be positioned at the outside of the cistern of container, and can point to the water surface place by window.
As the possibility of pulse, signal can be continuous substantially, but modulated so that timing reference to be provided.Alternatively, this signal can be modulated in the mode of pulse.
Alternatively, electromagnetic radiation or ultrasonic vibration can be tilted the surface that is oriented in liquid, and detecting device be positioned with detection of reflected leave the surface radiation or vibration.Along with liquid level changes, the amplitude of detected radiation or vibration changes, and sensed water level thus.
Weight/power sensing
In another embodiment, as shown in figure 12,, for example in the main consuming body 1 or the force transducer 51 in the base portion 2, detect the liquid volume in the reservoir 5 by the reservoir of weighing.This force transducer 51 can comprise strainometer or be arranged with the power of measuring between main body 1 and the base portion part 2 puts into other electricity, electronics or optical force detection part.This force transducer is calibrated the weight with compensated corpus 1; Because liquid has known density, so the weight of the volume of liquid and measurement is proportional.
In addition or alternatively, by detecting detected power whether less than the weight that is calibrated of main body 1, this force transducer 51 can be used for detecting main body 1 whether on base portion 2.Only, do not need accurate force transducer for this function, but instead working pressure switch or optical sensor.This optical sensor can be arranged in the base portion 2, and is arranged crested when being positioned on the base portion 2 when main body 1.
In addition or alternatively, by detecting the synthetic variation of power between main body 1 and the power base 2, this force transducer can be used for detecting the user and whether contacts main body 1.Therefore, this force transducer 51 can be used as the part of touch sensitive user controller.
In addition or alternatively, this force transducer can be used for detecting because simmering and/or seething with excitement of liquid causes the disturbance of liquid in the reservoir 5.This disturbance causes the little typical case fluctuation of the power between container body 1 and the power base 2, and described fluctuation can be used with detection by force transducer 51 sensings and controlled device 10 and simmer and/or seethe with excitement.
Use force transducer 51 to be used for the boiling detection particularly preferred layout can be provided, wherein: the number of the electric parts in the container body 1 is reduced to minimum.For example, if exist, switching and control function can be arranged in power base 2 and/or intermediate module 11a.The boiling sensing can be provided by the force transducer that is positioned at power base 2.Therefore, the electric parts in the container body 1 only need to comprise element board 12 and wireless connector 3 and dry combustion method protector (if safety standard needs).This wireless connector 3 can be the waterproof wireless connector of for example describing in WO08/012506A1, and make: this container body can be cleaned in dish-washing machine, and is particularly suitable for adding hot water liquid in addition.
In another preferred embodiment as shown in Figure 13, this container body is heated by the mode of the induction heater 52 that is positioned at power base 2 with induction, and utilizes and to be arranged in the power base and to be arranged the boiling that is applied to the force transducer 51 sensing liquid of the power on the base portion part 2 with sensing by container body 1.In this case, in container body 1, need not any electric parts, only form at least a portion of the bottom of reservoir 5 with the heatable part of induction mode such as plate 12.The structure of this container body 1 greatly is simplified, and container body can make complete waterproof, and need not electric sealing system.User interface 11 can be set in the base portion 2, perhaps is provided as remote control.
By selecting to provide the dry combustion method protection, during heating to be provided at more than the normal temperature of the heatable part of mode of induction but the Curie temperature below the point that causes container body is damaged in the dry combustion method meeting with the material and/or the structure of the heatable part of mode of induction.Therefore, dry combustion method protection can provide by self the regulating of temperature with the heatable material of mode of induction.As a kind of selection scheme, can in power base, sense the dry combustion method that causes by subsequently temperature rising by detecting induction heater and the variation of closing with induction lotus root between the heatable material of mode of induction.
In the heating vessel that does not comprise radio source base portion 2, this force transducer can be set in the container body 1 and be arranged to detect the power that main body 1 and main body 1 are placed between the superincumbent surface.
Ultrasound wave is prevented incrustation scale
For example use above-mentioned ultrasonic transducer 48 to cause ultrasonic vibration, be used for water level sensing purpose in addition at element board 12.For example, ultrasonic vibration can prevent to form incrustation scale on element board 12, and this also often during heating occurs.This effect is similar to the effect of using in ultrasonic cleaning; Ultrasonic vibration fluffs the particle of the incrustation scale of deposition on element board 12.Therefore, during heating or afterwards, can in element board 12, cause ultrasonic vibration continuously or off and on.
Element board 12 is included among the embodiment of noise abatement coating on the liquid side offside or processing (as described in patent application PCT/GB07/004797 or patent publications EP-A-1859711 or the GB-A-2386532) therein, uses ultrasonic vibration to form favourable especially to prevent the water dirt.
The noise abatement coating can be based on the coating of resin, and described coating has one or more in polyethersulfone (PES), polyphenylene sulfide (PPS), poly-para Toluic Acid's second diester (PET) and the polyamidoimide (PAI).This coating comprises in addition such as the non-sticky of fluoropolymer or hydrophobic composition.Fluoropolymer can comprise one or more in polytetrafluoroethylene (PTFE), fluorinated ethylene propylene (FEP) and the tetrafluoroethene (PFA).
This coating also can comprise one or more filling materials or pigment, for example, aluminium, barium sulphate, barite, carbon black, chlorite, chromium-copper black (copper chrome spinel black), glass, iron oxide, mica, quartz, silica, talcum and titania.This coating also can comprise such as acrylates resin flow adjuvant.
In a preferred embodiment, the composition of dry coating (for example, after the roasting) comprises resin composition and the 10%-20% non-sticky composition of 50%-65%.Preferably, this resin composition comprises PAI.Preferably, this non-sticky composition comprises PTFE.A kind of particularly preferred coating is Greblon (TM) coating from Weilburger Coatings GmbH, Greblon 1215 coatings comprise especially: have the PAI and the PTFE of filling material and flowing additive, or be called ' Ultra Serene ' modification (TM).
This processing can comprise coarse processing.In one embodiment, this surface has the smooth finish of 0.5-4Ra (average surface roughness) through coarse processing, but more preferably is about 2Ra.This surface can be by polishing, carry out coarse processing (for example, by sandblast), clean (for example, utilizing Scotchbrite (TM)), surface etching and/or abrasive blasting.
Find: after heat cycles several times, the hard water zone uses the use of this coating or processing to cause because at surface coating or handle the high-pitched tone squeal or the noise of whistling that the formation incrustation scale produces.Preferably, in the present invention, during heating or afterwards, ultrasonic vibration is applied to element board 12, with prevent to generate incrustation scale and thereby the high-pitched tone noise that produces, and need not such as disclosed complicated cataclastic structure in EP-A-1859711.
This ultrasonic transducer 48 can produce the ultrasound wave of frequency range 40kHz to 1.6MHz, and can have the energy consumption from several microwatts to 50W.This transducer 48 can directly be connected to element board 12 and/or the liquid in reservoir 5 connects; For example, this transducer 48 can be connected on the outside surface of reservoir 5, and make: ultrasound wave enters reservoir 5 through wall emission.This layout has transducer and element board 12 heat-insulating advantages.
The ultrasound wave incrustation scale detects
Incrusted deposit thing on element board 12 can change the resonance characteristics of element board, and the resonant frequency of can decay especially resonance or change element board.Therefore, control device 10 can produce ultrasonic vibration by making element board under specified resonant frequency, detects the amplitude of vibration, and determines that by the amplitude of vibration the existence of incrusted deposit thing detects the incrusted deposit thing on element board 12.The amplitude at resonant frequency place reduces to represent the decay of resonant frequency and/or moves, and therefore is illustrated in and has incrustation scale on the element board.
Efficiency rating
In above-mentioned level sensor or the detection technology at least some can be used for that tracer liquid is heated, some liquid are assigned with, and container turns back to water level or volume that its normal position (for example, kettle returns its wireless connector base portion) is retained in liquid in the heating vessel afterwards.In heating and the liquid that is retained in the container after distributing can indicate: surpass the more liquid that need because heating vessel is filled with, so heating vessel do not used effectively.
Therefore, in another embodiment of the present invention, the heated water yield and container body 1 turn back to the water yield of power base 2 backs (for example, after batch operation) during this control device measurement heating operation.Surplus water is calculated with the ratio that adds hot water and is used for determining efficiency assessment, and described efficiency rating is that the measurement how effectively to use is indicated to the user as container.This indication can be carried out when each container body 1 turns back to its power base 2, or only when efficiency rating very low, that is, and surplus water with add the hot water ratio and carry out this indication when higher.This control device for example can calculate the av eff evaluation with the average ratio that adds hot water based on surplus water in 10 operations or other the number of operations in the past.
Utilize the resistance detection of seething with excitement
In an optional embodiment, detect boiling by the resistance of measuring the water in the reservoir 5.This can realize by the resistance between measurement and the water electrodes in contact; Preferably, element board 12 forms an electrode, and another electrode is arranged in the sidewall of reservoir below minimal security water water level.Before arriving boiling point, on element board 12 local boiling can appear.Because near boiling point, the vapor bubbles that forms becomes bigger, and when between element board 12 and another electrode, measuring, increased the resistance of water on element board 12.This control program is measured this resistance, and when resistance has increased the predetermined percentage of its initial value, or resistance increases detection boiling when surpassing estimated rate.
If because the electrode in the sidewall is not dipped into, then resistance is very high, control program can be determined water deficiency in container, and can forbid heating.
Utilizing disturbance/disorder to detect seethes with excitement/simmers
In one embodiment, when water is stirred, utilize the level switch monitoring disturbance responsive to less, the very fast fluctuation of water level.A kind of this level switch is laser shown in Figure 10 and 11 or sound level switch.This detecting device accurately measures the fluctuation of the absolute distance of the water surface, and this control device 10 detects when to fluctuate and boiling when occurs or simmer to detect above predeterminated level.This predeterminated level can change according to the water yield in the container, and the described water yield also can be by device according to determining to the absolute distance of the water surface.
In another embodiment, utilize to detect the sonic transducer monitoring disturbance that water reaches the characteristic sounds of boiling point, for example, when water reaches boiling since the vapor bubbles in the water break reduce to cause add reducing of thermal noise.
In another embodiment, capacitive transducer is used for the little of sensed water level and fluctuation fast.
Alternatively, seethe with excitement and/or simmer and to detect by the angle fluctuation on partially liq surface.As can be in cleaning container clear observing, liquid surface during heating keeps basic horizontal, shows that during simmering some local angles change, and because the liquid that increases is disorderly or stir, shows the significant change of local surfaces angle between boiling period.
Shown an embodiment who utilizes from the light reflection of liquid surface among Figure 14.Transmitter 48 is arranged in the bottom of reservoir 5, and is arranged with the surface emitting electromagnetic radiation towards liquid from following.This wave beam that sends is fully wide illuminating the wide surf zone at all liquid level places that surpass predetermined lowest water level, or light beam can be narrower and use and be similar to the optical beam scanner scanning used in the bar code reader through the surface.Detecting device 49 is arranged in the bottom of reservoir 5 at opposite side, and is arranged to receive from the electromagnetic radiation of at least a portion reflection of liquid surface.This transmitter 48 and/or detecting device 49 can be sealed in the hole of the correspondence in the element board 12, or are sealed in the annular adapter of the periphery that is sealed in element board 12.
This electromagnetic radiation can be the narrow-band radiation, and detecting device 49 can be arranged to detect in narrow-band, to reduce the influence of ambient radiation.In order to improve signal to noise ratio (S/N ratio), the output of transmitter 48 can be modulated, and the detector circuit relevant with detecting device 49 can comprise bandpass filter or phase-locked loop.This modulation can be a coded modulation, and detector circuit can comprise the coded demodulation device.
This radiation can be such as ultrared visible light or near visible.This transmitter 48 can be an infrared LED.
Occur being defined as follows when surpassing the critical angle at interface between air and the liquid from the total internal reflection of liquid surface:
Θ C＝sin -1(n 2/n 1)
Wherein: for utilizing ultrared water, refraction coefficient n 1=1.33, and for air, refraction coefficient n 2=1.00, therefore the critical angle about surface normal is about 50 °.
According to liquid level, the angle on 49 surface can surpass or be no more than critical angle from transmitter 48 to detecting device.Yet, by boiling or simmer the disorder that causes and will cause normal to a surface, make: because total internal reflection also will be fluctuateed from surface reflection and the radiation intensity that received by detecting device 49 from the vertical direction localised waving.This control device 10 detects these fluctuations of self-detector 49, and determines boiling thus or simmer situation.Especially, can simmer by the minor swing detection of surperficial angle.Yet boiling causes producing at reverberator 49 places the fluctuation of confusion bigger in the surface of different pattern.
Also can reflex on the detecting device 49 from the radiation of transmitter 48 from covering 8 downside.The intensity of this reflection is substantially constant, and therefore the intensity that is detected by detecting device 49 skew is provided.Whether this skew may not can influence the degree of fluctuation of the intensity that is detected by detecting device, cover 8 and exist and/or closure but can be used for detecting.Therefore, this control device 10 can be arranged detecting existing of this skew, and provides and cover 8 indications that do not exist or be not closed in response to this.Alternatively or additionally, be detected as operculum 8 and do not exist or closed, this control device 10 can prevent heating operation.For this reason, ultrasound wave can be used as the possibility of electromagnetic radiation.Replace transmitter 48, light source can be used for illuminating reservoir 5 inside, and can detect from covering the light of 8 following lateral reflection.
The other parts of equipment (for example, the inwall of reservoir 5 or enter the water window of reservoir) can produce reflection or make described reflection distortion.For example, can cause minute surface or diffuse reflection by stainless steel, glass or plastic wall.These reflections will cause the systematic offset at detecting device 49 places usually, and therefore be compensated by control device 10.
In the modified example that shows in Fig. 5, this transmitter 48 and detecting device 49 all are positioned at the top of reservoir 5 or towards location, described top, leave the radiation of liquid surface from the surface reflection with detection.
In another modified example that shows in Figure 16, this transmitter 48 and detecting device 49 are placed on the opposite side of liquid surface, to detect also the intensity of the radiation that is not reflected that will fluctuate with disorder.
In the modified example of Figure 14 to 17, this radiation can be absorbed by the water vapour or the vapor portion of liquid surface top, or is moved and/or bubble deflection by water in the water body.This absorption can be monitored by control device 10, and is used to detect the state of water, or control device can compensate by the variation that absorbs and/or deflection causes alternatively.
In the modification of the embodiment shown in Figure 14 to 17, with ultrasound wave rather than electromagnetic energy towards surface emitting; By the amplitude fluctuation of control device 10 detection of reflected and/or ultrasonic waves transmitted, described control device is determined boiling thus or is simmered state.
Using optics or ultrasonic energy to detect in above-mentioned any modified example of surface disturbance, under the situation that the fluctuation that is detected is compensated for each other, energy preferably concentrates on the surf zone of the localised waving that is small enough to detect surperficial angle.
In the above-described modified example of reference Figure 14 and Figure 15, this transmitter 48 separates with detecting device 49, and detection and surperficial acutangulate reflection.Alternatively, this transmitter 48 and detecting device 49 can substantially and be put arrangement, and this detecting device 48 is arranged to detect the energy from the basic vertical reflection in surface.This transmitter 48 and detecting device 49 can be positioned substantially at element board in the heart, and also can be constructed to as the level sensor in the embodiment of Figure 10 and 11.Alternatively, as shown in figure 17, this transmitter 48 and detecting device 49 for example can navigate to a side of element board 12 in above-mentioned annular adapter.This transmitter 48 and detecting device 49 can be the single parts such as ultrasonic transducer or back reflection optical sensor.
This transmitter 48 and/or detecting device 49 need not to be positioned in the reservoir 5, but can instead be arranged in some other parts such as handle 9 of container body 1, and are arranged respectively energy be transmitted into reservoir 5 or receive described energy through window.Alternatively, this transmitter 48 and/or detecting device 49 can be positioned in the power base 1, and respectively via emission of the window in the base portion of container body 1 or received energy.This energy need not directly to be incident on the surface of liquid from transmitter 48, but can be instead for example is reflected by optics or sound reflector or refractor or light guide therefor or acoustic conductance part or is refracted on the surface of liquid.Similarly, this energy need not directly to be received by detecting device 48, but can or be refracted on the detecting device 49 from surface reflection.This transmitter 48 and detecting device 49 can be arranged on assembling or be assembled in the module of container body 1 or base portion 2 in the mode of renovating, or separate with base portion 2 with main body 1.
A following example describing the signal Processing of detection of reflected or emitted energy fluctuation with reference to Figure 18.Generate the IR signal of 2.35kHz square wave.Use 2.35kHz centre frequency and ± 470Hz-bandpass filter of three dB bandwidth amplifies and filters the IR that receives.As shown in figure 18, use amplitude measurement is quadratured (taking a sample at interval with 90 ° and 180 ° of phase angles), in 32 circulations of 2.35kHz signal, (spend about 13.6mS) and determine the amplitude of received signal.
Because V 1And V 3180 ° of phase differential, therefore can determine actual shifts voltage:
V Skew=(V 1+ V 3)/2
Use this offset voltage, then can determine true peak voltage by two measured values of 90 ° of actual phase difference:
V Pk=SQRT[(V 1-V Skew) 2+ (V 2-V Skew) 2]
Adopt this mode, this offset voltage is compensated, and any skew of the signal that caused by temperature and component variation of refusal.
This is repeated 25 times (spending about 340mS), determine minimum and peak swing during this period.Difference between minimum and the peak swing is the measured value of the disorder or the disturbance of liquid.This method can be carried out by control device 10 or by the special circuit of output disturbance or disorderly measured value.
Add heat control
In the above-described embodiments, for example by continuously changing heating power, or the working cycle of the opening and closing by changing heating element, this control device 10 can respond the disturbance that is detected or disorderly measured value and change the heating of water.But these control device 10 operational feedback loops, with the heating of change water, thus the disturbance or the disorder of realization substantially constant level; This method is preferred especially for following application, and wherein: liquid should preferably remain on and simmer, to produce the steam that some are used for heating purposes, for example, in Turkey's tea (Turkish tea) maker, tea-urn (samovars) or humidifier.Alternatively or additionally, the output of the power of well heater (one or more) can be controlled according to liquid level.This water level can detect by above-mentioned level sensor.Particularly, can be used for the power output of heat insulation function according to detected water level control.
The for example detection of response boiling, after heating mode stops, the insulation pattern that can enter container.Alternatively, this insulation pattern can be independent of the heating mode switching.By the power level of control heater, or regulate heating by the working cycle of utilizing variation in the mode of pulse and open and close, can regulate the heating in the insulation pattern, to realize the average heat levels of expectation.Periodically, for example after the circulation of predetermined quantity, can enter heating mode once more, and and then enter the insulation pattern so that water seethes with excitement again.
This container can be provided with aforesaid detection water and when arrive the low control device that simmers and/or seethe with excitement entirely; The insulation pattern can be entered then, or heating can be stopped together.In the insulation pattern, timer can be set up, and make: (for example, per 2 minutes) enters heating mode periodically, so that water reaches boiling point or simmers a little.The disturbance of the water that this control device monitoring representative simmers.Preferably, in case enter the insulation pattern, this control device continues the disturbance of monitoring water, and when detecting when simmering, and reduces or cancel being incubated and heat.
Adopt this mode, vapor sensor no longer is necessary; This may be favourable, because can avoid condensing in the control device, and need not to take place the cost of vapor sensor.Temperature control equipment also can be configured to detect water and when be cooled to below the lowest threshold, makes to enter the insulation pattern.Yet preferably, the input of heat during the insulation pattern is changed to be complementary with thermal loss from water, makes and can avoid thermostatic circulation.
Water level detecting before when heating or heating
At least some level sensors described herein or detection technology can be used for detecting when carrying out heating operation or before described heating operation water level in the heating vessel or volume, to determine whether liquid level surpasses predetermined maximum stage and/or below predetermined minimum level; If no, can forbid heating operation, or indicate to the user.Adopt this mode, can prevent the dangerous operation of container.Maximum and/or the minimum level that should be scheduled to can be according to the operating parameter settings of container, for example with minimum and maximum level corresponding to security purpose, if or for example the user wishes then can change described predetermined maximum and/or minimum level by the user by never heating is next energy-conservation above the specific water yield.
In addition or alternatively, at least some water level sensings disclosed herein or disturbance or disorderly pick-up unit are used in when carrying out heating operation or detected whether there is not liquid substantially in container before described heating operations.If like this, can forbid heating operation, or indicate to the user.For example, the detecting device that is used to detect from the reflection of liquid surface may detect from surperficial no reflection events, and this can be used as the indication that does not have liquid.Alternatively, capacitance detector can detect and not have liquid.
Water level detecting during filling
Here at least some level sensors of Miao Shuing or detection technology can be used for detecting liquid level or the liquid volume in the heating vessel when container is just filled.When surpassing predetermined maximum stage, can alarm indication to the user.In the situation of the wireless container of Miao Shuing, this container body 1 can comprise rechargable power supplies in the above, makes: when container body 1 when base portion 2 removes, this control device can be carried out water level detecting.This predetermined water level can for example utilize user interface 11 to be provided with by the user.Preferably, though when container body 1 when base portion 2 removes, also can change this set.For example, the user can select between two or more predetermined water level, for example, and full (for example, 1.7 liters), ecological (ecological) (1 liter) or single glass.If surpass predetermined water level, this user interface 11 can provide option to the user, and high water stage also continues to fill to change to more, or pours out some water, up to reaching current water level.
From scale removal
By above-mentioned any one technology for detection during to too much incrustation scale, this control device can be removed the incrustation scale of container automatically when for example.When control device then detected container emptied, control device was opened heating element to force dry-fire condition.This can automatically perform, but for security reason, and preferably, container indication user needs boiling by force, and responds the user then and start and force dry combustion method.This dry fire condition can keep continuing schedule time length, or reaches predetermined temperature up to element board 12.During dry fire condition, heating element plate 12 often makes incrustation scale come off.
Preferably, this container sky that before forcing dry combustion method, inclines fully, otherwise the pressure of the liquid in container boiling will deposit more incrustation scale.Water level detecting may be not enough to detect delicately low-water level and anhydrous fully between difference.Therefore, in the starting stage of forcing dry combustion method, temperature that can sensing element plate 12 rises, and if the speed that rises of temperature be lower than predeterminated level, force to do around termination, this can indicate since boiling just from element board 12 loses heat.
Optional embodiment
Except above-mentioned modified example, other modified example is regarded as falling within the scope of protection of the present invention.For example, the present invention has more than and is confined to kettle and control device thereof; Aspect of the present invention for example can be applicable to water boiling device, the coffee machine such as the Mocha coffee machine, Turkey's tea maker, tea-urn, boiling water kettle, pan, sauce maker, steam copper, chocolate chafing dish (chocolate fountain), dip chafing dish, slow cooker and milk frothing machine.
The foregoing description shows but does not limit the present invention.After learning above-mentioned explanation, those skilled in the art will expect that optional embodiment also can fall within the scope of protection of the present invention.

Claims (111)

1. boiling in the tracer liquid heating container or the method that simmers may further comprise the steps:
Detect the disturbance or the disorder on the surface of described liquid; And
In response to detected described disturbance or disorder, detection is seethed with excitement or is simmered.
2. method according to claim 1, wherein, the disturbance on the surface of the described liquid of described detection or disorderly step comprise:
The fluctuation of the water level of at least a portion on tracer liquid surface.
3. method according to claim 1, wherein, the disturbance on the surface of the described liquid of described detection or disorderly step comprise:
The fluctuation of the angle of at least a portion on tracer liquid surface.
4. method according to claim 3, wherein, the step of the fluctuation of the angle of at least a portion on described tracer liquid surface comprises:
Described a part of emitted energy towards described surface; And
Detect of the fluctuation of described energy from the reflection on described surface.
5. method according to claim 3, wherein, the step of the fluctuation of the angle of at least a portion on described tracer liquid surface comprises:
Described part emission electromagnetic radiation towards described surface; And
Detect of the fluctuation of described energy by the transmission on described surface.
6. according to claim 4 or 5 described methods, wherein, described energy comprises electromagnetic radiation.
7. according to claim 4 or 5 described methods, wherein, described energy comprises ultrasound wave.
8. according to each the described method in the claim 4 to 7, wherein, the step of the fluctuation of the angle of at least a portion on described tracer liquid surface comprises:
Use is carried out the oscillation amplitude change that quadrature assigns to determine to receive energy to amplitude measurement.
9. according to each the described method in the claim 4 to 8, may further comprise the steps:
The reflection and/or the distortion of the described energy that the part owing to described heating vessel is produced compensate.
10. according to each the described method in the claim 4 to 9, may further comprise the steps:
Detect of the reflection of described energy from the downside of lid.
11. method according to claim 10 may further comprise the steps:
Indicate described lid whether to determine to be closed.
12., may further comprise the steps according to claim 10 or 11 described methods:
If determine that described drowning is closed, forbid heating operation.
13. method according to claim 1 and 2, wherein, the disturbance on the surface of the described liquid of described detection or disorderly step comprise:
Detect the fluctuation of the electric capacity of described liquid.
14., comprise in response to detected described disturbance or the disorderly device that simmers or seethe with excitement that changes the heating of described liquid with maintenance substantially constant level according to the described method of aforementioned each claim.
15. the method for the state of the lid of a tracer liquid heating container may further comprise the steps:
Detection is from the reflection of the downside of described lid; With
Determine by described reflection whether described lid is closed.
16. method according to claim 15 may further comprise the steps:
Downside emitted energy towards described lid; And
Detect of the reflection of described energy from the downside of described lid.
17. method according to claim 16, wherein, described energy comprises electromagnetic radiation.
18. method according to claim 16, wherein, described energy comprises ultrasound wave.
19. each the described method according in the claim 15 to 18 may further comprise the steps:
Indicate described lid whether to determine to be closed.
20. each the described method according in the claim 15 to 19 may further comprise the steps:
If determine that described drowning is closed, forbid heating operation.
21. the equipment of the state of a lid that is used for the tracer liquid heating container comprises detecting device, described detecting device is used to detect from the reflection of the downside of described lid and is used for determining by described reflection whether described lid is closed.
22. equipment according to claim 21 comprises transmitter, described transmitter is used for the downside emitted energy towards described lid, with the described energy of following lateral reflection from described lid.
23. equipment according to claim 22, wherein, described energy comprises electromagnetic radiation.
24. equipment according to claim 22, wherein, described energy comprises ultrasound wave.
25. according to each described equipment in the claim 21 to 24, comprise indicator, described indicator is used to indicate described lid whether to be determined closure.
26. according to each described equipment in the claim 21 to 25, just, then forbid heating operation if described equipment is arranged to determine that described drowning is closed.
27. one kind is used for the boiling of tracer liquid heating container or the equipment that simmers, comprises:
The disturbance or the disorderly device that are used for the surface of tracer liquid; With
Be used in response to the described fluctuation that is detected of satisfying preassigned or disorderly definite device that seethes with excitement or simmer.
28. equipment according to claim 27, wherein, the disturbance on the described surface that is used for tracer liquid or disorderly device comprise the device of fluctuation of the water level of at least a portion that is used for the tracer liquid surface.
29. equipment according to claim 27, wherein, the disturbance on the described surface that is used for tracer liquid or disorderly device comprise the device of fluctuation of the angle of at least a portion that is used for the tracer liquid surface.
30. equipment according to claim 29, wherein, the device of the fluctuation of the angle of described at least a portion that is used for the tracer liquid surface comprises:
Transmitter, described transmitter are arranged to the described a part of emitted energy towards described surface; With
Detecting device, described detecting device are arranged to detect the fluctuation of electromagnetic radiation from the reflection on described surface.
31. equipment according to claim 30, wherein, described transmitter and described detecting device are spaced apart to detect and surperficial acutangulate reflection.
32. equipment according to claim 30, wherein, described transmitter is basic with described detecting device and put arrangement to detect and the vertical substantially reflection in surface.
33. equipment according to claim 30, wherein, the device of the fluctuation of the angle of described at least a portion that is used for the tracer liquid surface comprises:
Transmitter, described transmitter are arranged to the described a part of emitted energy towards described surface; With
Detecting device, described detecting device are used to detect the fluctuation of described electromagnetic radiation by the transmission of described surface.
34. according to each described equipment in the claim 30 to 33, wherein, described energy comprises electromagnetic radiation.
35. according to each described equipment in the claim 30 to 33, wherein, described energy comprises ultrasound wave.
36. according to each described equipment in the claim 30 to 35, wherein, reflection and/or distortion that described detecting device is arranged to described energy that the part owing to described heating vessel is produced compensate.
37. according to each described equipment in the claim 30 to 36, wherein, described detecting device is arranged to detect the reflection of described energy from the downside of lid.
38. according to the described equipment of claim 37, whether described equipment is arranged to indicate described lid to determine to be closed.
39. according to claim 37 or 38 described equipment, described equipment is arranged to:, then forbid heating operation if determine that described drowning is closed.
40. equipment according to claim 27, wherein, the disturbance on the surface of the described liquid of described detection or disorderly device comprise the device of the fluctuation of the electric capacity that is used for tracer liquid.
41. the heating vessel with level sensor comprises pressure transducer, described pressure transducer is arranged in the place, bottom or the close described bottom of the reservoir of described heating vessel and arranges.
42. the heating vessel with force transducer, described force transducer are arranged to sensing and are applied to surface-supported power by described heating vessel.
43., comprising according to the described heating vessel of claim 42:
Container body; With
Be used to described heating vessel that the power base that adds thermopower is provided, described force transducer is arranged to sensing and is applied to power between described container body and the described power base.
44. according to the described heating vessel of claim 43, wherein, described force transducer is arranged in the described container body.
45. according to the described heating vessel of claim 43, wherein, described force transducer is arranged in the described power base.
46. according to each described heating vessel in the claim 43 to 45, wherein, described power base be arranged to provide with described container body in the dedicated radio link of electric heater.
47. according to each described heating vessel in the claim 43 to 45, wherein, described power base comprises induction heater, described induction heater is used for heating in the mode of induction at least a portion of described container body.
48. according to the described heating vessel of claim 47, wherein, described at least a portion comprises the end of described heating vessel.
49. according to claim 47 or 48 described heating vessels, wherein, described at least a portion has Curie temperature, described Curie temperature is at liquid between the period of heating more than the operating temperature in described at least a portion, if but be enough to damage below the temperature of described heating vessel when heating under the situation that is not having liquid.
50., comprising: the device that is used for calculating the liquid level of described heating vessel by the described power that senses according to each described heating vessel in the claim 42 to 49.
51. according to each described heating vessel in the claim 42 to 50, comprise variation that is used to detect the described power that senses and the device that begins to move in response to described variation, described change list requisition family contacts described heating vessel.
52. according to each described heating vessel in the claim 42 to 51, comprise fluctuation that is used to detect the described power that senses and the device that begins to move in response to described fluctuation, described fluctuation characterizes the boiling of described liquid or simmers.
53. the heating vessel with water level or volume sensor comprises the resistance of the liquid that is used for measuring described heating vessel and is drawn the device of water level or volume by described resistance.
54. the heating vessel with water level or volume sensor comprises the electric capacity of the liquid that is used for measuring described heating vessel and is drawn the device of water level or volume by described electric capacity.
55. a level sensor that is used for heating vessel comprises:
Be used for device towards the surface emitting signal of liquid; With
Thereby be used to detect from the signal of the surface reflection of described liquid and determine the device of the water level on described surface.
56. according to the described level sensor of claim 55, described level sensor is arranged to transmit and time of being spent between received signal after the described surface reflection is determined the water level on described surface by measurement.
57. according to claim 55 or 56 described level sensors, wherein, described signal is pulsed.
58. according to each described level sensor in the claim 55 to 57, wherein, described signal is modulated.
59. according to each described level sensor in the claim 55 to 58, wherein, described device that is used to transmit and the described device that is used for detection signal align substantially with the central vertical axis of described heating vessel.
60., wherein,, determine the water level on described surface by detecting from the amplitude of the signal of described surface reflection according to the described level sensor of claim 59.
61. according to the described level sensor of claim 60, wherein, with the described signal of the angular emission of described surface tilt.
62. according to each described level sensor in the claim 55 to 61, wherein, described signal is a ultrasonic signal.
63. according to each described level sensor in the claim 55 to 61, wherein, described signal is an electromagnetic signal.
64. according to the described level sensor of claim 63, wherein, described electromagnetic signal is a laser signal.
65. a water level or a volume sensor that is used for heating vessel comprises:
Be used to emit ultrasonic acoustic waves into the device in the liquid; With
Be used for determining the water level of described liquid or the device of volume by detected ultrasonic resonance frequency.
66. according to the described sensor of claim 65, described sensor is arranged to change the frequency of ultrasonic waves transmitted, thereby and detects described resonant frequency.
67. according to the described sensor of claim 65, described sensor is arranged to detect the amplitude of described resonant frequency, thereby and the water level or the volume of definite described liquid.
68. according to each described sensor in claim 55 to 62 or 67, wherein, the described device that is used to emit ultrasonic acoustic waves in the liquid comprises ultrasonic transducer.
69. according to the described sensor of claim 68, wherein, described ultrasonic transducer is included in the element board in the base portion of described heating vessel.
70., comprise being used for electric signal is applied to the element of described element board to produce hyperacoustic device according to the described sensor of claim 69.
71. according to the described sensor of claim 68, wherein, described ultrasonic transducer is connected to described element board.
72. a heating vessel comprises a kind of according to each described level sensor in the claim 55 to 71.
73. the method for the boiling in the tracer liquid heating container may further comprise the steps:
Detect the resistance of the liquid in the described heating vessel; And
Increase in response to detected described resistance detects boiling.
74. according to the described method of claim 73, wherein, by and the liquid electrodes in contact between apply voltage and detect described resistance.
75. according to the described method of claim 74, wherein, a heating element that comprises described heating vessel in the described electrode.
76. boiling in the tracer liquid heating container or the method that simmers may further comprise the steps:
The sound that detection is sent by the heating of liquid; With
When described sound satisfies corresponding predetermined standard time, detect boiling or simmer.
77. a detection is used for the method for incrusted deposit thing on the element board of heating vessel, may further comprise the steps:
Make described element board under the specified resonant frequency of described element board, produce ultrasonic vibration;
Detect the amplitude of described ultrasonic vibration; And
Determine the existence of described incrusted deposit thing by the amplitude of described ultrasonic vibration.
78. the method for the efficiency rating of the use of a definite heating vessel may further comprise the steps:
The amount of measurement remaining heating liquid after heating vessel distributes; And
Determine described efficiency rating by the described remaining heating fluid scale of construction.
79., further comprising the steps of according to the described method of claim 78:
Measurement before distributing in described heating vessel the amount of heated liquid, and determine described efficiency rating by the amount of liquid of before distributing, measuring in addition.
80. according to the described method of claim 79, wherein, described efficiency rating by be retained in after distributing in the described heating vessel amount of liquid with distribute before in container the average ratio of heated amount of liquid determine.
81. the method for the liquid level in the tracer liquid heating container may further comprise the steps:
When detecting the heating operation of the described heating vessel of beginning or begin described liquid level before the described heating operation; And
If detected described liquid level surpasses predetermined maximum stage, then forbid liquid is heated.
82. the method for the liquid level in the tracer liquid heating container may further comprise the steps:
When detecting the heating operation of the described heating vessel of beginning or begin described liquid level before the described heating operation; And
If detected described liquid level meets or exceeds predetermined maximum stage, for the user provides indication.
83. 1 or 82 described methods according to Claim 8, wherein, described maximum stage can be regulated by the user.
84. 3 described methods according to Claim 8, wherein, when detected described liquid level met or exceeded previous predetermined maximum stage, the user can regulate described maximum stage.
85. the method for the liquid level in the tracer liquid heating container comprises:
When detecting the heating operation of the described heating vessel of beginning or begin described liquid level before the described heating operation; And
If detected described liquid level is in predetermined lowest water level or be lower than described predetermined lowest water level, then forbid liquid is heated.
86. the method for the liquid level in the tracer liquid heating container may further comprise the steps:
When detecting the heating operation of the described heating vessel of beginning or begin described liquid level before the described heating operation; And
If detected described liquid level is in predetermined lowest water level or be lower than described predetermined lowest water level, for the user provides indication.
87. 5 or 86 described methods according to Claim 8, wherein, described predetermined lowest water level and the liquid empty container that inclined substantially is corresponding.
88. a method of removing the incrustation scale of electric heating vessel may further comprise the steps:
Whether detect described electric heating vessel by the sky that inclines; And
Connect the heating element of described electric heating vessel, to force dry-fire condition.
89. 7 described methods wherein, in response to detecting described electric heating vessel substantially by the sky that inclines, after detecting incrustation scale, are connected described heating element automatically according to Claim 8.
90. 7 described methods according to Claim 8 wherein, are inclined after the sky substantially detecting described container electricity heating vessel, in response to user's affirmation, connect described heating element.
91. each described method in 7 to 90 according to Claim 8, wherein, the described electric heating vessel of the described detection empty step of whether being inclined comprises:
Start heating operation; And
According to the temperature rate-of-rise of described heating element, whether detect described electric heating vessel by the sky that inclines.
92. the method for the heating power in the controlling liquid heating container said method comprising the steps of:
Detect the ambient sound level, and when described ambient sound level is low, reduce described heating power, with the noise that reduces to send by heating.
93. an electronic-controlled installation that is used for heating vessel, described electronic-controlled installation are arranged to carry out according to each described method in claim 1 to 20 and 73 to 92.
94. a control program that comprises program code devices, described control program are arranged to carry out according to each described method in claim 1 to 20 and 73 to 92.
95. an equipment that is used for the boiling of tracer liquid heating container comprises:
Be used for detecting the device of resistance of the liquid of described heating vessel; With
Detect the device of boiling in response to the increase of detected described resistance.
96., comprising according to the described equipment of claim 95:
Be used for the electrode that electrically contacts with liquid; With
Be used between described electrode, applying the device of voltage.
97. according to the described equipment of claim 96, wherein, a heating element that comprises described heating vessel in the described electrode.
98. one kind is used for the boiling of tracer liquid heating container or the equipment that simmers, comprises:
Be used to detect the voice detector of the sound that sends by the heating of liquid; With
Be used for determining boiling or the device that simmers when described sound satisfies corresponding predetermined standard time.
99. the equipment of the incrusted deposit thing on the element board that is used for the tracer liquid heating container comprises:
Be used to make described element board under the specified resonant frequency of described element board, to produce the device of ultrasonic vibration;
Be used to detect the device of the amplitude of described ultrasonic vibration; With
Be used for determining the device of the existence of described incrusted deposit thing by the amplitude of described ultrasonic vibration.
100. wireless electric heating vessel that can be connected to wireless base portion by wireless connector, described wireless electric heating vessel comprises electronic-controlled installation and power supply, described power supply can operate with when described wireless electric heating vessel and described base section from the time provide electric power for described electronic-controlled installation, wherein, described electronic-controlled installation optionally is arranged to enter ready mode, in described ready mode, reduced the electric power that obtains from described power supply.
101. according to the described wireless electric heating vessel of claim 100, wherein, described electronic-controlled installation is arranged to enter described ready mode with described base section after continuing to surpass predetermined space at described wireless electric heating vessel.
102. according to claim 100 or 101 described wireless electric heating vessels, wherein, described electronic-controlled installation is arranged to leave described ready mode in response to being reapposed over the wireless electric heating vessel on the described base portion.
103. according to each described wireless electric heating vessel in the claim 100 to 102, wherein, described electronic-controlled installation is arranged to leave described ready mode in response to user's actuating.
104. wireless electric heating vessel that can be connected to wireless base portion by wireless connector, described wireless electric heating vessel comprises electronic-controlled installation and power supply, described power supply can operate with when described wireless electric heating vessel and described base section from the time provide electric power for described electronic-controlled installation, wherein, described power supply comprises photovoltaic power source.
105. an element board that is used for heating vessel comprises being used to make described element board to produce the device of ultrasonic vibration.
106. according to the described element board of claim 105, wherein, the device that is used to make described element board produce ultrasonic vibration is arranged to produce described ultrasonic vibration between the period of heating of described element board.
107., comprise the ultrasonic transducer that is connected to described element board according to claim 105 or 106 described element boards.
108., have noise abatement coating and/or processing according to each described element board in the claim 105 to 107.
109. according to the described element board of claim 108, wherein, described noise abatement coating is based on resin, and comprises non-sticky or hydrophobic composition.
110. according to claim 108 or 109 described element boards, wherein, described processing comprises the rough surface processing.
111. one kind comprises the heating vessel according to each described element board in the claim 105 to 107.
CN200880124266XA 2007-11-07 2008-11-06 Liquid heating vessel and control Pending CN102187292A (en)

Applications Claiming Priority (13)

Application Number Priority Date Filing Date Title
GB0721858.9 2007-11-07
GB0721858A GB2448009A (en) 2007-03-30 2007-11-07 Liquid heating vessels
GBPCT/GB08/001102 2008-03-26
PCT/GB2008/001102 WO2008119966A2 (en) 2007-03-30 2008-03-26 Liquid heating vessels
GB0808483.2 2008-05-09
GBGB0808483.2A GB0808483D0 (en) 2007-07-17 2008-05-09 COntrols for liquid heating vessels
GBPCT/GB08/002073 2008-06-18
PCT/GB2008/002073 WO2008155538A2 (en) 2007-06-18 2008-06-18 Liquid heating vessel and control
GB0817907.9 2008-09-30
GBGB0817907.9A GB0817907D0 (en) 2007-11-07 2008-09-30 Liquid heating vessel and control
GB0817975.6 2008-10-01
GBGB0817975.6A GB0817975D0 (en) 2007-11-07 2008-10-01 Liquid heating vessel and control
PCT/GB2008/003737 WO2009060192A2 (en) 2007-11-07 2008-11-06 Liquid heating vessel and control

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CN200880124266XA Pending CN102187292A (en) 2007-11-07 2008-11-06 Liquid heating vessel and control

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EP (1) EP2227722A1 (en)
CN (1) CN102187292A (en)
WO (1) WO2009060192A2 (en)

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