The specific embodiment
With reference in the description of embodiment, similar between different embodiment or similarly parts with same designated.
Heating vessel with thermistor
Fig. 1 shows a kettle with electronic controller, the example of a heating vessel of using as first and second embodiment of the present invention.In this example, this kettle is wireless kettle, comprise: vessel 1 and have power source base 2 and bottom wireless connector 3 and 4 of independent body, CS4/CS7 (power supply bottom box) and CP7 (device plug) that 360 ° of wireless connectors of the described pattern of for example disclosed patent WO-A-94/06185 and/or Auto control Co., Ltd sell can be used as reference.This power supply bottom connects and can be connected to the supply socket (not shown) by power line 13.
This vessel 1 comprises reservoir 5 and the base section 6 that is used to hold heated water, also has stem bar 7, lid 8 and handle 9.Water is formed on element board 12 heating of the bottom of this reservoir 5, and comprises the heating element heater (promptly towards base section 6) that is positioned at downside.This element board 12 can use as the described Easifix of WO99/17645 (RTM) device and be mounted to this vessel.This element comprises thick film element.Preferably, this element board 12 is made up of stainless steel.This element board can be the shape that circle, ellipse, rectangle or any required being fit to are mounted to vessel.This element board 12 below can be detailed description.
This base section comprises the electromagnetic controller 10 that is used to control the container operation state, has the more description of details below.User interface 11 allows the user to operate this container, and the display of the mode of operation of this container can be provided.This controller electronics can be separated between described user interface 11 and controller 10.Thermistor 14 is arranged to the temperature by the water in this element board 12 sensing reservoirs 5, and preferably isolates with this heating element heater heat.In this example, do not have steam pipe from the top delivering vapor of this reservoir 5 to controller 10 because can determine boiling by the input inspection of thermistor 14 rather than by sensing steam, below can the more description of details.This thermistor 14 can have negative temperature coefficient (NTC).In the description of some embodiment below, boil by being different from the Equipment Inspection of temperature sensing, so this thermistor 14 is optional.
This container can have one or more supplementary features, and the some of them feature has the more description of details below.Then, for fear of repetition, some these features can outline here.
The additional Heating Characteristics of this container can comprise " insulation " feature, and this feature makes liquid remain on a predetermined temperature, preferably after boiling; This can be realized by the interrupt enable of main heating element heater, or is realized by the interruption or the sustained activation of second heating element heater.This predetermined temperature can be just in time under boiling point, or is lower temperature, and such as 80 ℃, this predetermined temperature can be selected by the user.
Another Heating Characteristics is that (sub-boil) feature is boiled in the Asia, and wherein, liquid is heated to the predetermined temperature under the boiling point, and such as 80 ℃ of the usefulness of making coffee, adding thermoelectric power then can turn-off or reduce, for example deexcitation insulation pattern.This predetermined temperature can be selected by the user.
Another Heating Characteristics is to prolong to boil feature, and liquid is heated to boiling whereby, boils then to continue preset time at least, and for example 30 seconds by 2 minutes, with sterilised liq.
User interface 11 can comprise remote controller, and is described as the example of PCT/GB08/002073.
This element board 12 can comprise one or more elements that can be connected to a plurality of electrical outlets, as the described example of PCT/GB08/002808.
The thick film element plate
Each following embodiment comprises the thick film element plate 12 that is used for heating vessel, and this element board comprises the steel substrate 21 that is roughly circle, is preferably stainless steel.The rated power under the 240V Alternating Current Power Supply of heating element heater in these embodiments is 3.1kW.
Insulating barrier 22 is deposited on the substrate 21.The thick film of high resistivity material heating trace part 23 is deposited on the insulating barrier 22, and contact 24a, the 24b of low resistivity material be deposited on the insulating barrier 22, and electrically contacts with this heating trace part 23.25 usefulness same low resistivity material in coupling part forms, and will heat trace part 23 and be connected in series.The bridge 26 that same low resistivity material is made can form overbending to avoid overheated in heating trace part 23.Next, the protection glaze can be deposited at least some parts of element board 12, avoids corroding so that electric insulation and/or guard block portion to be provided.External contact, such as contact 24a, 24b, 31,32a and 32b not by glazing, to allow its electrical connection.
This thermistor 14 can be installed in the central area of this element board, central space zone as shown in drawings, and be connected to contact 31 and 32b.This trace 23 is designed to make as far as possible the zone around this element outside more to be used.This central area remains on outside the heating trace 23, to reduce the direct heat conduction of this trace 23 to this thermistor 14, the therefore temperature that can follow the trail of water more accurately.
In this first embodiment, sensor trace 30 is deposited on the insulator 22.Easily, this sensor trace 30 is piled up simultaneously with this heating trace 23 thereby coplane roughly, and forms and this heating trace 23 parts together layer.This sensor trace 30 preferably forms many (on December 3rd, 2008 was that 63 pennies of every grams are than 805 pennies of every grams) that this material is more cheap than high resistivity/TCR material usually by the resistance trace material identical with this heating trace 23.Yet, this material have when being used for temperature sensor relative low-resistivity (such as, 20-200m Ω/square, for example 100m Ω/square), and have low relatively temperature-coefficient of electrical resistance (TCR), cause low relatively signal strength signal intensity.
In order to make the resistance maximization and therefore to make signal (such as voltage signal) the intensity maximization that obtains autobiography sensor trace 30, sensor trace 30 is designed to long as much as possible and thin.In addition, overheated for roughly any zone that can sense this element board 12 fully, this sensor trace 30 is distributed on the major part of this element board 12, and therefore is suitable for the dry combustion method and the build-up of limescale that detect stain, tilt to cause.In order to realize these advantages, this sensor trace 30 extends along the gap between heating trace parts 23 and himself broken line, makes this sensor trace 30 comprise the part that connects almost parallel with 180 ° narrow curved roughly outside its end points continuously.The bend that is positioned at heating trace part 23 that these end points can be close to.
Sensor contact 32a, 32b are connected to arbitrary end points of sensor trace 30, to allow this sensor trace 30 to be electrically connected to sensor circuit or to be connected to the electronic controller 10 of the temperature regime that is used for detecting element 12.The specific embodiment of this sensor circuit and this electronic controller can divide other more description of details below.
This second embodiment, as shown in Figure 3, the place that is different from first embodiment be this sensor trace 30 comprise have high resistivity, the sensing part 33 of high TCR material.This resistivity can be typically 1-100 Ω/square scope in, for example 10 Ω/square.This TCR can be typically in the scope of 1500-3000ppm.These parts 33 are connected in series by the unitary part of sensor trace 30, use heater trace 23 identical materials among first embodiment to make; This is more cheap than being used for being connected this sensing part 33 from the low resistivity material (typically comprising silver) of making contact 24a, 24b, 31,32a and 32b.In addition, this material with PTC can change with temperature signal.
This sensing part 33 is arranged in such zone, and this zone shows high specific temperature rise probably under dry-fire condition.In addition, in order to detect the dry combustion method of inclination when not considering incline direction, sensing part 33 distributes around this element.
This sensing part 33 provides higher signal strength signal intensity, but than first embodiment all more expensive aspect material and the labor service, because the material require that adds is used for this sensing part 33.The length of this sensing part 33 can be selected to the cost performance that possesses expectation.
Heating vessel with vapor sensor
Fig. 4 shows the kettle with electronic controller, and as the example of a heating vessel, the first embodiment of the present invention and second embodiment can be applied to this example.This kettle is to shown in Figure 1 similar; Like is with identical designated, and their description is not in this repetition.Yet, use thermistor 14 to detect to boil in order to replace, shown in the dotted line among Fig. 4, the steam lead 17 from water surface top delivering vapor to the vapor chamber 18 of these element board 12 belows when being provided at liquid and boiling.Vapor sensor 40 is set on the downside of the element board 12 that is arranged in vapor chamber 18, has the more description of details below.This vapor chamber can provide the volume that holds steam in 12 times side spaces of this element board, and at least in part this vapor sensor 40 is isolated from other electric members such as electronic controller 10.In this manner, can prevent or alleviate the damage that causes owing to entering of steam to other electronic components.
Fig. 4 shows the center that vapor sensor 40 is formed on element board 12, and steam pipe 17 passes the hole at an edge of element board 12.This set need be positioned at long relatively vapor chamber 18 below the element board 12 with delivering vapor to vapor sensor 40.Interchangeable, this steam pipe 17 passes a hole of contiguous this vapor sensor 40 of element board 12 cores, makes this vapor chamber 18 take less space.Interchangeable, this vapor sensor 40 can be positioned at any suitable zone of element board 12, and advantageously, can be positioned at towards the edge of element board 12 to be easy to lead to and be positioned at reservoir steam pipe 17 5 one sides or the outside.
The 3rd embodiment
The 3rd embodiment is different from the first embodiment part and is, vapor sensor 40 usefulness thick film screen printings are formed on the element board.This vapor sensor 40 comprises that higher resistance material makes long, thin trace, typically in 1-100 Ω/square range, for example 10 Ω/square.TCR can be typically in the scope of 1500-3000ppm.This trace arrangement becomes complications or sinuous making can be compressed into a little area.This vapor sensor 40 is electrically connected between contact 31 and 32b.When liquid boiled, steam for example by detecting the change of resistance or electric capacity, was used for the sudden change or the gradual change of sensing local humidity by on the steam pipe 17 guiding vapor sensors 40.Change in order to tackle this, this electronic controller 10 reduces or turn-offs the thermoelectric power that adds in the heating vessel.
The embodiment of the vapor sensor 40 of a replacement illustrates in accompanying drawing 7 in more detail.Except comprising continuous trace, this vapor sensor 40 also comprises a pair of barium titanate (BaTiO that is formed on
3) the silver electrode 40a that crosses one another, 40b on the thick film layers 42, this thick film layers 42 is deposited on the insulating barrier 22.Electric capacity between electrode 40a, the 40b depends on humidity or the moisture level between electrode 40a, the 40b.
Preferably, this vapor sensor 40 is not by glazing, and making can be more responsive to humidity.The selection of the material of this vapor sensor 40 is for preventing that the silver migration is extremely important.For example, this silver electrode can comprise high-grade palladium.
Preferably, vapor sensor 40 becomes dry after sensing the situation of boiling.The heating trace that separates can be provided for dry steam sensor 40, and perhaps vapor sensor 40 can be by the heated drying of heat on every side or element conduction.Replacedly, little electric current can be set up and be used to detect humidity by vapor sensor 40 and be detected up to the situation of boiling, and big electric current boils the back by vapor sensor detecting, and making can dry steam sensor 40.
Before vapor sensor was dried, whether the liquid in can't the tracer liquid heating container boiled.Therefore, if heating current is boiling the back by manual connection, this heating element heater can be switched on the scheduled time again, such as 15 seconds, does not consider to boil whether take place with regard to cut-off current then.
The 4th embodiment
The 4th embodiment as shown in Figure 6, is with the 3rd embodiment difference: 40 pairs of responsive to temperatures of vapor sensor rather than to humidity sensitive; For example, the resistivity of vapor sensor 40 can be to responsive to temperature.Steam is because the sudden change of the temperature that senses and collision in the present embodiment the vapor sensor 40, and for this is reacted, electronic controller 10 reduces or turn-offs the thermoelectric power that adds in heating vessel.This vapor sensor can be calibrated, and makes the variation of temperature of colliding along with steam to be arrived by reliable detection.
As shown in Figure 8, sensor trace 30 can be arranged to the resistance 16 of cross-over connection low-voltage V and connect, and the variation of the voltage V1 at resistance 16 two ends can be by the indication of electronic controller 10 detections for the variation of the resistance R 2 of sensor trace 30.When reaching resistance threshold or resistance change rate when having reached the resistance of sensor trace 30, heating current can be disconnected or reduce.The susceptibility of sensor circuit can improve by using amplifier.
In order to be input to electronic controller 10, voltage V1 is typically converted to digital value by analog-digital converter (ADC).Shown in the example of Fig. 9, if this causes signal with respect to the input range of this analog-digital converter (ADC) hour, the digital translation measured value may have bad resolution ratio.
Resolution ratio can strengthen by the equalization digital measured value.For example, Figure 10 illustrates the moving average that can adopt 10 measured values result as input value.Although the transition between the digital measured value is more level and smooth than the result among Fig. 9, this measured value is altitude figureization still.
The resolution ratio of measured value can further be improved to measured analog signal by " vibration (the dither) " signal in increase cycle before input ADC, and as shown in figure 11, the moving average of 10 measured values of employing ADC is as measured value.The amplitude of this dither signal is preferably the resolution ratio that equals ADC at least, more preferably is big twice, makes measure analog signals transition between at least two ADC digital output values, even measured analog signal is static.Thus, " vibration (dithered) " average signal measured value has than Fig. 9 and higher resolution ratio shown in Figure 10.
The heating liquid distributor
To describe a kind of heating liquid distributor below, its feature can comprise the improvement of the disclosed heating liquid distributor of WO-A-07/096630; The content that part is described is included as background technology below.
First example shown in Figure 12 and 13, comprising: electric heating spray bottle has reservoir 110, nozzle 112 and power supply base 113.Nozzle 112 is connected to trigger 114, the pump machanism 116 of manual activation and manages 118.Trigger 114 actuated pump mechanisms 116.Pump machanism 116 comprises the piston 120 that is installed in the cylinder 122.Spring 124 is positioned at described cylinder 122 equally.When the user stirred trigger 114, piston 120 was pushed in the cylinder 122, therefore compressed spring 124.When trigger 114 was released, piston was pushed back cylinder 122 by the action of spring.
When piston was pushed into cylinder, liquid was extruded from pump machanism 116.When trigger 114 was released, piston 120 moved out (still being maintained at the circular cylindrical shell simultaneously) from cylinder 122, therefore made fluid body by managing 118 from reservoir 110 extractions.
Pump machanism 116 more comprises two one-way cocks 124,126---one between cylinder 122 and reservoir 110, another is between cylinder 122 and nozzle 112.This has guaranteed to be forced out nozzle 112 from the liquid that reservoir 110 is extracted out, and can not flow back in the reservoir 110.
Nozzle 112 is rotatable, makes the user concentrating injection and to disperse selection between the injection.The known spray bottle that is present in of such nozzle is not deeply being described here.
Heating element heater such as thick film element plate 12, with the self-operated thermostatic controller 128 of the power supply of attenuation elements when reaching predetermined temperature 12, is disposed in the bottom of reservoir 110.For example, this predetermined temperature can be 60 ℃, is suitable for the temperature of windshield defrosting, or is used for for example using the clean operation of the cleaning agent of heating to use.More generally, this preset temperature can be in 40 ℃-70 ℃ scope.
Heating element heater 12 can be included in and reach the warm keeping element that is energized again behind the predetermined temperature, makes liquid to be incubated at one for the low temperature of this predetermined temperature.Interchangeable, self-operated thermostatic controller 128 can be connected heating element heater 12 when fluid temperature is lower than a predetermined lower temperature.
Also be provided with one there and cross heat controller 130, be used to protect heating element heater 12 overheated when self-operated thermostatic controller 128 lost efficacy.When an overtemperature apparently higher than predetermined temperature was detected, this crosses heat controller 130 can turn-off the power supply that leads to heating element heater 12.This overtemperature can preferably be preferably 80 ℃ between 70 ℃-90 ℃.
A kind of temperature controller that is suitable for present embodiment is described in GB-A-0329636, as shown in Figure 15.This controller comprises first and second thermal actuators 128,130.Described thermal actuator 128,130 comprises can operate the bi-metal plate that is used to stand unexpected distortion, when each thermal actuator 128,130 stands to be out of shape suddenly, its configuration can make element 12 be reduced power supply, prevents that thus the liquid in the reservoir 110 is heated above distinct temperature.In present example, this first thermal actuator 128 is by the unexpected distortion that typically is configured to stand under predetermined temperature self, such as 60 ℃.This second thermal actuator 130 is configured to move under overtemperature, for example 80 ℃.In other embodiment, this first and second actuator can be configured to two fully independently members that are installed on diverse location in this device.
Power supply base 113 be operated be used for providing power supply to heating element heater 12 with the liquid of heated reservoir 110 to the temperature that is lower than boiling point.In one embodiment, base 113 comprises a for example electric connector of 360 ° of type described in the EP-A-0922426.This is configured in the user and can uses under the situation of heating spray bottle of the weight that needn't carry power supply base 113 and have special advantage.
In the example of a replacement, self-operated thermostatic controller 128 can be included in the power supply base 113, and can be connected to the temperature sensor that is positioned among the reservoir part.
Steam vent 140 is set in the sidewall of reservoir 110, can significantly not increase along with the rising of the temperature of described reservoir 110 contents with the air pressure that guarantees 110 li of reservoirs.Steam vent 140 can be any suitable configuration, such as being hole in reservoir 110 sidewalls, or is the valve as slit valve or spring contact pressure relief valve.
The wall of reservoir 110 can comprise thermal insulation part 144, makes that the user can not have to hold reservoir 110 under uncomfortable state when liquid reaches preferred temperature.This thermal insulation part 44 only needs to be provided for to extend on the part of the sidewall that is used to holding.Replacedly, though this may increase the weight of heating spray bottle, whole wall can heat insulation.
Indicating equipment such as lamp 142 (for example LED) can be set for to indicate when self-operated thermostatic controller is started, and the temperature that when is contained in the liquid in the reservoir 110 is heated to the limit of predetermined temperature.
Further, preferred indicating equipment 142 is arranged in power supply base 113, allows the storage component of device can be easy to be rinsed such as being configured to, for example, and dish-washing machine.Corresponding flushable connector such as described in the GB2387523 that, preferably surpasses the AN connector of land used typical electrical kettle.
This example has the advantage that more effective cleaning is provided when using cleaning agent, and in replacing use, the boiling water kettle that for example uses when as the car wind shield de-icing is safer than using.This imports water in the spray bottle more facility and safety then than must add hot water in kettle.This same electric energy that uses still less, and need not use the used chemical agent of current conventional nozzle ice removal.Another application is oil spout or fat, such as soybean oil, in culinary art or when being used for the seasoning of puffed rice for example, can be used and replace to butter.
Second example comprises the flavoring distributor of heating as shown in figure 14.In the present embodiment, liquid distributes by pipe 112 rather than nozzle.Flavoring or flavouring can be heated in reservoir 110 until reaching predetermined temperature, and flavoring or flavouring can use pump 116 to be assigned with under this temperature then.Flavoring or flavouring can use above-mentioned muff heater insulation.Present example can be used in warm chocolate flavouring especially.
In each embodiment, if pump or injection be by device inner such as the power drives of rechargeable battery or electric capacity with favourable, make that pump or injection can be operated when device during with the disconnection of radio source base.
In an alternative embodiment, power supply base 113 comprises induction heater, and heating plate 12 is included in reservoir 110 plate by this induction heater eddy-current heating when being installed in power source base 113.
The multi-part device
The main body that is disclosed in the liquid heating among the WO-A-07/096630 comprises all right one way or the other separated components: heated reservoir 110 and the distribution member that comprises nozzle 112.This main body can be connected to power supply base 113.
In one embodiment of the invention, the main body of heating liquid main distributor comprises at least three separable parts: distribution portion, heating part and the mid portion that can connect between this heating part and this distribution portion.This heating part comprises heating element heater 12 and optional electric member, such as heat controller and/or wireless connector, and can maybe cannot comprise reservoir 110.Reservoir 110 can be limited by one or more these parts, can for example extend to mid portion from heating part.The different size of mid portion can be used to allow the volume-variation of reservoir.Low profile device can comprise that heating part does not comprise heating part and low profile mid portion of reservoir.
In an alternative embodiment, the order of connection of each several part can be different; For example, heating part can be connected to distribution portion, and the storage part can be connected to distribution portion or heating part; These all parts can link together by common single connector.All are necessary is that heater block is before distributing or the liquid in the heating reservoir.
Specific embodiment relates to the improvement of the heating spray bottle in Figure 12 and 13 shown in Figure 16-18.As shown in figure 13, pipe 118 can be set to make the bottom extraction of liquid from reservoir 110.Pipe 118 can comprise that filter enters distributor gear to prevent particle.Pipe 118 can comprise check valve (non-return valve).
In the embodiment of Figure 16, nozzle 112 is arranged on the distribution portion, and mid portion comprises heat insulation handle portion 144, and heating part comprises reservoir 110.In the embodiment of Figure 17, nozzle 122 is arranged on the distribution portion, and mid portion comprises heat insulation handle portion 144 and reservoir 110, and heating part comprises heating element heater 12; In other words, heating element heater 12 is formed for the separable base plate of reservoir 110.
The embodiment of Figure 18 comprises four separable parts: comprise nozzle 122 distribution portion, comprise heat insulation handle portion 144 first mid portion, comprise second mid portion of reservoir 110 and comprise the heating part of heating element heater 12.
Different parts can connect individually by any suitable coupling such as screw or bayonet lock device.Wherein, need rotation to arrange between different piece, this can pass through the easy or reinforcement of coupling transfiguration; For example, the bayonet lock coupling allows only to connect a direction of rotation.
An advantage that device is divided at least three separating parts is cleaned for these parts are easier.What for example, the opening of at least one part can be enough cleans to being convenient to inside greatly.
Heating part can be cleaned in dish-washing machine, for example uses the equipment that is used to show the dish-washing machine machine washing of any above-mentioned discussion.Interchangeable, distribution portion and/or mid portion can be machine-washed by dish-washing machine, but heating part can be entered in the electric component to avoid water by wiped clean; This is particularly suitable for the embodiment that heating part comprises the separable base plate of reservoir 110, because base plate is convenient to wiped clean.
If be difficult to very much cleaning, mid portion and/or distribution portion can be disposable.In this manner, this device can be repeated to utilize to small part (such as heating part).
Interchangeable, any one of separating member all can be equipped with disposable lining, packing ring or the liner that comprises the material that is used to distribute, and makes lining or packing ring to be dropped under the situation of the member that does not need to clean this separation.Disposable lining, packing ring or liner can be by the pre-liquid that is assigned with of filling, perhaps as the consumer goods independently with by user's filling liquid.
Another advantage is, each part can be configured and make their function optimum; For example, this mid portion can by have thermal insulation and or/material that be fit to grip constitutes, heating part can be made of thermal resistance material simultaneously.This heating part also can be made by heat insulator, to reduce thermal losses.This device can be suitable for desk, is used to distribute heating liquid, therefore can have insulator foot so that face damages desk.
This heating part is connected in a plurality of different pieces any one interchangeably, such as mid portion and/or distribution portion.In the embodiment shown in Figure 19, distribution portion comprises distributing pipe 112 and pump 116 as in the example of Figure 15, can be connected to the reservoir 110 of the embodiment of Figure 16.This mid portion can be used as an adapter and with permission the standard distribution portion is connected to analgesic part, or vice versa.
Interchangeable distribution portion can be used, and that can be exchanged is connected to mid portion and/or heating part.In one embodiment, Figure 20 shows distribution portion and the nozzle 112 with the pump 116 that is used to make reservoir 110 superchargings, is connected to reservoir 110 by flexible conduit 132.This distribution portion can comprise that reservoir 110 and removable being connected to have the heating part of heating element heater 12.Figure 21 shows the distortion with electric driving pump 116.This pump 116 can be used this pump when device disconnects with the radio source base by the power drives such as battery.
This mid portion or distribution portion comprise interchangeable reservoir, make being assigned with that different liquid can take turns.For example, reservoir 110 comprises first liquid that can separate with heating part and is replaced by the reservoir that comprises by second liquid.This for example is being applied in dissimilar liquid, during such as the paint of different colours or coating, different colours or sugar-coat concentration, different cleaning agent or different sesame oil, has special advantage, can avoid staining between the different liquid.This reservoir 110 can remove from heating part under the situation that can not spill contents.One or more supporters or housing can be provided for and store tradable part, make liquid when removing other parts, can be maintained in those parts.But each all comprises this supporter or housing and is used for preventing contained leak of liquid of each several part or dry lid.
Reservoir 110 can be filled in the position of upset.In the embodiment of Figure 22, reservoir 110 has dependence from the downward inner passage 134 of reservoir 110 open tops, makes reservoir 110 to be filled under upturned position there not being contents to run out of under the open-topped situation.Reservoir 110 can comprise the number of altitude, makes that the volume of the liquid that comprised when upturned position can be identified.
When reservoir was made of heating part and mid portion, reservoir 110 can be filled by combined heated part and mid portion, fills reservoir 110, connected then and went up distribution portion.
When liquid comprised two parts mixture, a part of mixture can be placed on heating part, and mid portion can be connected to heating part.Another part mixture is injected into the height of mid portion to expectation.The ratio that allows the each several part of mixture is be scheduled to accurate.
Heated liquid or solid can be supplied to the formation mid portion and be assembled into before use in prepackage (pre-packed) container of heating part; This assembly can pierce through this container or other modes cause it to open, and makes contents can be heated element 115 heating.
The heating liquid distributor can comprise that agitator 136 or other mix the equipment of contents in the reservoir 110, for example for avoiding separating or promoting the emulsification of contents.As shown in figure 23, agitator 136 can be by being mechanically attached to motor, or be driven by magnetic coupling.This magnetic coupling can be by this device top or base section setting or alternately by the periphery setting of this device, for example be arranged in this device one or more solenoids on every side, as the description of following more details by use.This motor can such as rechargeable battery or electric capacity, make this motor can be operated when device disconnects with the radio source base by the power drives in the device.This motor and agitator 136 can be used as a black box, for example, are positioned at this device cap, by the terminal use removable be installed on the device or among.Can be alternatively, motor and agitator can be used as separated components and are provided, one all the both can by the terminal use removable be installed on the device or among
In another embodiment, be included in the removable installing component more than one electric driving function.Lid 221 as shown in figure 35 is dotted line shows, and is electrically connected under the situation that equipment 240 realizes being electrically connected by separable, removable be connected to and disconnect from reservoir 110.This assembly 221 comprises: electric pump 116, the actuator that is used for pump 116 or trigger 114 and the conduit 118,112 that is connected to and is connected self-pumping 116, and to allow with motor 241 distribution of being arranged to drive agitator 136.This assembly 221 comprises equally: the lid 220 of one, with sealing storage 110; With handle component 222, excite trigger 114 constantly with the supporting cover device.This is used for the printed element 205 of the heater of element board 12 for the bottom of this reservoir 110 of formation.Controller (not shown) and electric connector (not shown) are positioned among the bottom member 6, and the electric lead (not shown) is connected to the equipment of being electrically connected 240 by the lid 230 that is positioned on the reservoir 110 from bottom member 6.
In another embodiment, for example additional the or interchangeable electric function of ventilation unit or vibrator can be comprised among the removable cap assemblies 221.
Interchangeable, as shown in figure 24, agitator 136 can for example be passed through handle 140 and manual drives.This agitator 136 can be connected to the manual activation of pump 116, makes contents to be stirred and distribution by individual part.
Agitator 136 can drive from bottom, top or the side of device, but the distribution portion corresponding setting.For example, distribution portion can be installed in reservoir 110 the side or below.
Agitator 136 can in heart be installed in 110 li of reservoirs or with the misalignment of reservoir 110.Agitator 136 can adopt any type of distortion such as the inwall of rotatable reservoir 110 or wall portion, randomly has one or more projectioies inwardly, such as fin, to promote the mixing of contents.Replace the contents in the agitated reservoir, these contents can for example enter in the reservoir 110 by the pipe suction air and inflate, or for example by cause reservoir partly or entirely or be arranged in the part vibration of reservoir or vibration stir with.
The material that is assigned with at room temperature can for viscosity or solid or gel, but after being heated element 12 heating, become low-viscosity, liquefaction or dissolving, can easierly distributing; Example comprises butter, culinary art fat, glue or Silicone Sealants.As shown in figure 25, what contents were set to be fit to be positioned at standard size among the holder 110 and/or shape heavily fills out thing 142, such as the Silicone Sealants of standard pipe, enters and contacts with heating element heater 12, under this kind situation, standard silicon rifle type distributor can be used as distribution portion.Replacedly, this heavy thing 142 of filling out can comprise housing, and formation can be connected to the mid portion of heating part and distribution portion, and this housing can abandon after use.
This device can comprise and is used to the equipment that guarantees that pump only can just be started after this material becomes the liquid that will be assigned with fully, detects or infers that this material has been heated to the self-operated thermostatic controller or the timer of correct temperature such as being used to.Wherein, this device comprises agitator 136, and this device can comprise and be used to detect the equipment that this material is stirred the viscosity of device 136 actuatings that it is enough low to distributing until this viscosity to suppress the pump starting.This control appliance can comprise sensor, such as the motor protector that detects the beater motor excess load.In this case, motor protector can turn-off the motor of excess load, and restarts motor when motor protector is restarted himself, the operation that can continue up to motor; Pump also can be started then.This pump can start automatically, or this pump can be by manual starting after enabling as the reaction after being enabled.
In the embodiment of a replacement of the present invention, the gel of liquefaction when the material that is assigned with is stirring or stirring.In this case, this device does not need heater, but substitute comprise aforesaid agitator or agitator.
Thermal mass (thermal mass)
In another embodiment, shown in Figure 26-28, reservoir 110 can comprise the second chamber 110b that is used for holding the first chamber 110a that is heated element 12 heated liquid and is used to hold the liquid that is used to distribute that is heated by the liquid of the first chamber 110a.In specific embodiment, this second chamber 110b is contained among the 110a of this first chamber at least in part in the mode of bain-marie.This first chamber 110a can hold water, and this second chamber 110b can hold to crossing heat sensitive liquid, such as Yolk milk oleic acid thick chilli sauce, butter, syrup or molten chocolate.
The liquid in this second chamber of heating heating 110b, come the steam (steam and/or vapour) of the water that heats among the comfortable first chamber 110a to can be used for stirring, inflate or the liquid in the second chamber 110b of foaming, for example milk.
Figure 36 shows a kind of setting, and wherein water 250 is injected into the first chamber 110a by hole 252,220 is sealed by this then.To enter chamber 110b from the top by heated liquid 251 in the second chamber 110b, and depend on distribution method, chamber 110b can possess lid or not possess lid.Passage 260 is communicated with this first and second chamber.The top of this passage preferably is higher than the top of hole 252 and chamber 110b, so that keep isolating from the liquid in two chambeies.Liquid 250 is by heating element heater 205 heating such as printing (thick film) heating element heater, and then the steam of the boiling that produces at the first reservoir 110a utilizes vapor pressure to transfer in the liquid 251 by managing 260, and consequently liquid 251 is heated and is inflated (or steaming) simultaneously.Pipe 260 can comprise that venturi tube or feasible pressure, direction and the total amount that enters the steam of this second chamber 110b of dispensing head can change according to the liquid that is included among the second chamber 110b.As seen, for example this device can be used the same way as foaming milk based on the milk foam maker of traditional Cappuccino coffee making device outside.If the second reservoir 110b is covered, then must possess the equipment that prevents to pass through the overvoltage of liquid 251 generations because of steam pressure.
Liquid 251 can distribute by perfusion or by nozzle or pump.
In another embodiment, air both also can pump into by managing 260 in the pumping liquid 251 separately, made gas and steam can mix with the enhanced foaming process.
Figure 37 shows the embodiment of a replacement, utilizes steam to give heated liquid 251 heating or ventilation in the second chamber 110b.In the present embodiment, the second chamber 110b is positioned at 110a inboard, first chamber removedly, has seal 270 between two chambeies.
Liquid 250 is heated element 205 heating, and the pressure that is produced by steam makes steam enter second liquid 251 of the second chamber 110b by one or more check valves 260 that are arranged in second chamber 110b bottom.In case this pressure decay, valve 260 are got back to the closed position and are entered the first chamber 110a to prevent liquid 251.
Each embodiment among Figure 36 and 37 can have agitator 136 equally.
Shown in accompanying drawing 28 and 37, the second chamber 110b is in order to clean or the reason of other following discussion can remove from the first chamber 110a.The second chamber 110b can be separately connected to distribution portion, and can remove from the first chamber 110a in distributes.By this way, the user need not lift first chamber 110a and the contents thereof in distributes, just the second chamber 110b can be turned back among the first chamber 110a with distribution portion, to reheat the contents among the 110b of this second chamber.In this case, heating part need not provide wireless connector, because heating part is not lifted in distributes.
The first chamber 110a does not need to comprise liquid, but can then comprise the solid thermal material that is heated by heater 12, then heat is discharged in the dispensable liquid.Replace hot material, a kind of material can be used to show reversible exothermic reaction, and this reversible exothermic reaction absorbs heat from heater 34, and heat is discharged in the dispensable liquid.
Pressure balance in the reservoir
Steam vent 140 in reservoir 110 can be by ventilation film sealing, makes pressure balance when being heated with the gas in reservoir 110.This film can be by such as Gore-tex
TMThe fluoropolymer fabric make.Interchangeable, this film can be by making such as the silicones elastomeric material with one or more apertures (such as hole or crosscut hole).Under normal conditions, elastic membrane is effective waterproof, but open when the expansion of pressure in the hole.
Interchangeable, reservoir 110 can have variable volume, such as using piston device or expansion chamber to make container to be heated along with the gas in the reservoir 110 and to increase.
Dispenser portion for example can be configured to distribute the predetermined amount of fluid that adapts to the unique user action by being provided with of pump 116.The total amount or the allotment ratio of the liquid that is distributed by unique user action can be adjusted by the user.
This distribution portion can comprise interlocking device, can not be assigned with unless make liquid surpass first predetermined temperature and/or be lower than second predetermined temperature.This device can comprise whether the temperature that is used to indicate the liquid containing thing surpasses first predetermined temperature and/or be lower than the temperature indicator of second predetermined temperature.This temperature indicator can be thermochromism, electronics, electric or machinery.
This device can comprise informing user's liquid is arranged in device equipment how long, for example is used for whether the suggestion composition needs to mix again or no longer be fit to use.This equipment can comprise time movement, counter or indicator, such as having the chemicals indicator that changes the slow reaction of color or other cognizable attributes through certain hour.
This distribution portion can comprise the ratchet type distributor, makes liquid be assigned with under by progressive actuating at distributor, and this distributor is reset then.
This device can comprise that the equipment that is used for ZhaoMing Center's part is to improve operation; For example, nozzle or manage 112 periphery or front area can be illuminated.Reservoir 110 can be by interior lighting, and/or can have transparent or semitransparent wall or wall part, makes that contents can be easy to be seen, for example to judge the height and the situation of contents.Reservoir 110 can have the visual number of altitude, makes the volume of current contents in reservoir 110 can be easy to be determined by the user.Under the situation of wireless device, the equipment that is used for throwing light on can make that illumination still can be provided when apparatus main body and the disconnection of wireless base by the power drives that is included in device body.This power supply can be included in rechargeable battery or the electric capacity that charges when apparatus main body is connected to power supply base.Interchangeable, power supply can comprise non-rechargeable battery.
This device can be the wireless device that is connected to the radio source base or can have nonvolatil connection power line.This wireless base can be 360 ° of wireless bases.
Reservoir 110 can be made by stainless steel, plastics, glass or pottery.The limit of reservoir can be parallel, recessed or projection.The level cross-sectionn of reservoir 110 can be rectangle or oval-shaped to be easy to storage, perhaps can be circular cross section.This reservoir can be for double-walled, and two walls are all made by a kind of material or two kinds of different materials.The double-walled assembly can have heat insulation or this material can select to have specific properties.This heat insulation can comprise between vacuum or the wall having heat insulator.
Heating element heater can be the floor element plate, immerse plate or for being combined in reservoir 110 walls or being formed on the element of storing on the wall.Heating element heater can be resistance heater, self-adjusting ptc heater, trace heater, Ohmic heating device, induction heater, radiant heater or ultrasonic wave heater.The floor element plate can have thick film, die casting or ferrule element.This thick film element can comprise overtemperature protection, such as the disclosed E-Fast of WO-A-2006083162
TMOr as the disclosed parallel E-Fast of WO-A-2008/150172.This element board can be laser-welded on the bottom of reservoir 110, and for example WO-A-2007/136256 is disclosed.
In an alternative embodiment, what heater can be the liquid of being arranged to heat its distribution flows through type (flow-through) heater, rather than before distributing the contents in the heated reservoir.
The heating liquid distributor
The application of the heating liquid distributor in the embodiment of the invention comprises: distribute the spices of heating, such as perfume or air freshener; The detergent solution that is used to improve cleaning that distributes heating is such as being used for pot and/or barbecue rack; The pesticide that is used for the efficient allocation heating; Be distributed in room temperature and be solid or viscosity but after heating assignable liquid; Before distribution, need the application that two or more components are mixed together or react; The glue or the sealant that distribute heating are such as Silicone Sealants; Distribute paint; The liquid that distributes composition with orientation separation; Distribution needs to heat, stir or stirs to produce the liquid of the reaction that need reach desired effects; Foaming milk for example, dispense liquid footwear polishing agent; Distribute waterproofing agent; Distribute automobile buffing wax or analog; Distribute the clean liquid that for example is used for alloy wheel; The culinary art oil that distributes heating is to improve coverage (coverage); Divide the warm water that is used in the hair style device; With the massage or the spices massage oil that distribute heating.
The heating of the liquid of milk and other like attributes and control scheme
Heating and/or foaming milk have special problem, although these problems also may take place in other have the liquid of like attribute.
The problem that need be overcome has:
● prevent to be heated liquid during heating or bonding afterwards reservoir.
● the position of the agitator in the liquid container and speed.
● the position of the self-operated thermostatic controller in the device and the setting of temperature.
● the hot material of heating element heater.
● the inhomogeneities of fluid temperature.
● the ability of the self-operated thermostatic controller that resets makes device can be repeated immediately to use after device injects at milk.
● when sediment was deposited on the element, how recognition device need be cleaned completely.
Prevent that during heating or afterwards the milk remaining thing from bonding to reservoir
This programme is all very important for the operation of the heating container that any a part of liquid solidifies on uniform temperature.The device that need be used for heating milk preferably cannot not comprise stickingly (non-stick) coating; Yet when if the temperature of the device that contacts with milk reaches a certain temperature, this coating can not prevent that sediment from staying on the element.The inventor determines, if the temperature of the part that this device contacts with milk can remain below 100 ℃, milk seldom or nothing solidify generation; When the temperature of this part of contacting with milk of device during 150 ℃ of left and right sides, sedimentary accumulation generation; When the temperature of this device and milk contact portion reached 200 ℃, sedimentary accumulation took place on a large scale.
In a cleaning device, during heat treated, the milk in this device shows as heat and sinks, and the major part of wet sides that can effectively keep heating element heater is about 100 ℃, if this heating element heater is configured to make that heat is even in whole surface distributed.Be known that the really uniform distribution of heat of printed element, so sediment seldom occurs in this thermal source type.Yet the device on a lot of markets comprises the sleeve heating element heater, and wherein heat concentrates on the sleeve immediately, and these heating element heaters make the easier appearance of sediment.
In case precipitation begins to form, will show as and slow down the heat conduction and in each heat treated subsequently, effectively increase local temperature.Contiguous sedimentary temperature increases to the temperature spot that sediment burns very apace, and extremely difficult removing.
The following examples are devoted to limit this temperature, and therefore any sedimentary accumulation can for example be used wet cloth and easily remove.
Except component type, other factor, the distribution of heat the and during heating back is from the time that heating chamber is poured out milk in the milk temperature that turn-offs such as heater, the power of heating element heater, the heating chamber, each all can be to sedimentary heap effect.
Prevent the scheme of burning, for example reduce the temperature that device turn-offs, may reduce the satisfaction of user for device, so the reduction that each scheme must the bascule performance.
The ferrule element substrate
Be known that the evenly heat distribution of heating element heater of material sheet that increases high conductivity in the one or both sides of stainless steel element board; Yet this scheme is very expensive, is not the additional step of present technique field recognized techniques because it needs one.
The following examples have proposed to prevent the even scheme of wet sides temperature distributing disproportionation of element board (preferably comprising stainless steel) during heating operation.
Figure 30 a shows the cross section in the METAL HEATING PROCESS chamber 110 that is used for the milk foaming.In this case, mechanical ferrule element 202 is attached on the aluminium substrate 201, and aluminium substrate 201 directly is attached to again on the bottom 12 of wire chamber 110, and therefore bottom 12 is as the heating element heater plate.The thickness of normal expectation aluminium substrate 201 is even, but in the present embodiment, substrate 201 has been increased thickness on element sleeve 202, so this zone has more materials with the heat that dissipates, and this causes the temperature of the element board 12 on this zone to reduce immediately.Figure 30 b show with Figure 30 a in the similar configuration of heating chamber 110, yet space or recess 203 are provided in the substrate 201 in this embodiment, between element sleeve 202 and element board 12.This space 203 has stopped from element sleeve 202 to element board the thermally conductive pathways on 12.This space 203 can be included in the circular passage of substrate 201 upper surfaces, spreads all over this sleeve 202 at least.This annular channel can comprise complete ring or part ring (promptly extend and be less than 360 °).This space 203 can be had the material of optional thermal conductivity fills, and this thermally conductive materials is selected such that the uniform heat distribution through element board.This material can be formed the ring-type piece to place this annular channel at assembly process.This material can be the low heat conductivity metal, such as stainless steel.This material can be integrated in the outer surface of heating chamber 110, for example prior to substrate 201 on heating chamber 110 installation and be welded on the heating chamber 110.This setting can be convenient to substrate 201 and be welded on the heating chamber 110.In the alternative embodiment shown in Figure 30 c, substrate 201 from element sleeve 202 radially inwardly and/or increase and decrease thickness outwardly; This set is still propagated heat on element board 12 widely, but can reduce height among Figure 30 a.
Figure 31 a shows with Figure 30 a and similarly disposes, yet in the present embodiment, substrate 201 has at the bottom of radially the wall liner 201 inside or the cores thinner than exterior section, and the heat distribution of therefore passing element board 12 is more even.The thickness that in other words, at least three kinds of different substrates 201 are arranged: the thick part in the outer radial position on sleeve 202 installation places; Mid portion radially with interior thickness; With interior section thin, radially.The gradient of thickness can be for continuous rather than step, shown in Figure 30 and 31.This configuration has more the advantage of the thermal mass that reduces substrate, can help to reduce the overheated of element 12 when milk is poured out device.
Figure 32 a and 32b and Figure 30 a are similar, yet substrate 201 extends beyond the edge of heating chamber 110 peripheries in these embodiments.In the embodiment of Figure 32 a, substrate 201 with the same plane of substrate 201 interior sections in extending outwardly radially.In the embodiment of Figure 32 b, the substrate plane of part internally extends out, towards heating chamber 110, and around the outer surface of the sidewall in chamber 110 extend and with its thermo-contact.
In any embodiment, the mass action of the increase of substrate 201 extended exterior sections is for reducing the mean temperature of component substrate 201, and in the embodiment of Figure 32 b, the formation of substrate 201 act as the thermo-contact between 201 and the heating chamber 110 that increases layer.
The embodiment of Figure 32 a and 32b is shown as the substrate 201 with uniform thickness, but Figure 30 is a, the variable thickness shown in 30b or the 31a.
As above described in detail, the tendency that milk burns on element board between the common operating period has reduced, because milk act as heat sinking (heat sink); Yet, close at self-operated thermostatic controller and to have no progeny, when the milk of foaming when this device is poured out immediately, the rising immediately of this tendency.In this case, because the major part of milk is removed, the residual heat of element can rise to the temperature of wet sides 200 ℃, and the residue of milk can be burnt immediately under this temperature.
The additional mass that element board 12 peripheries among these embodiment increase has increased the heat zone from substrate 201 tops, when milk is poured out, can dissipate and effective temperature that reduces these regional overshoots.
Figure 34 a, 34b and 34c show has the embodiment that replaces the element ferrule configuration, and wherein heating load is propagated the surface of crossing heating plate, has therefore weakened potential focus.
Figure 34 a shows twins' ferrule element 202 and is combined into two concentric C shape sleeves 202 and is installed on the substrate 201.
Figure 34 b shows two sleeves 202 that are installed on the substrate 201.Outer sleeve is a C shape, and inner sleeve is wound into and is used for crossing the further shape (as star) of propagation thermic load of substrate 201.
Benefit among the embodiment among Figure 34 a and the 34b comprises following list one or more:
1, to cross substrate more in heat propagation.
2, power density the and therefore running temperature of two sleeves can be lower than single C shape element.
3, switch can be arranged so that in the element sleeve 202 one is turned off because of milk reaches temperature required, therefore closes the still less overshoot (overshoot) of having no progeny at self-operated thermostatic controller 128.
Figure 34 c shows single coiling (as star) ferrule element 202 and is installed on the substrate 201.This shape can more uniform propagation heat load spread all over substrate 201, and the length that increases can reduce the power density of any point that provides.
The location of automatic temperature control device
The temperature of automatic temperature control device is selected two aspects that mainly contain that will consider: the final temperature and the temperature of reforming.
Ideally, this self-operated thermostatic controller should stop at that point that milk reach desired temperature, and how cool milk add to be used in the heating chamber follow-up during the time reform.
Usually the minimum acceptable milk temperature of feeling is 60 ℃, usually self-operated thermostatic controller stop and reform between the rarest 10 ℃ difference.Lower difference is possible, but these variations have increased the pressure of bimetal blade and shortened the useful life of member, perhaps need more expensive member.
Because the milk foam maker exists the complicated machinery of many known specifications and characteristics that make self-operated thermostatic controller and the attribute of physics, for example:
A) high-quality machinery ferrule element store heat during heating, and disconnect power supply back dissipation heat to milk at element.
B) temperature of milk and be installed in the time delay of the heat between the temperature of self-operated thermostatic controller of dried side.
C) from the influence of heat on self-operated thermostatic controller of the conduction of heating element heater.
Only act on the temperature of milk if will turn-off the self-operated thermostatic controller of this device, self-operated thermostatic controller need be oriented to the influence away from component substrate so, and considers the position of self-operated thermostatic controller and the temperature delay between the milk actual temperature; Same permission total amount of heat is closed to have no progeny at device and is dissipated.Influence c) can alleviate by in substrate 201, cutting out or form a hole and self-operated thermostatic controller being directly installed on the element board 12.Compensating by some number of degrees of temperature that all reduce this setting under each situation influences a) and b), but reset temperature and the unacceptable point of thing followed user cool time to one can be reduced so significantly.
Interchangeable and preferably, the termination temperature of self-operated thermostatic controller should be higher than the actual temperature of milk, so this device can be cooled to the temperature of reforming more fast and is used for follow-up use to guarantee that this device quick starts.If self-operated thermostatic controller is during heating obeyed additional heating source, it is in conjunction with the influence of the heat sinking effect of milk, and in conjunction with a given reliable switch time, this can be done.
The applicant makes self-operated thermostatic controller, and this self-operated thermostatic controller combines the function of some the form temperature sensing that uses self heating, for example, and in heat lag even hot-water heating system greater than the plastics of metal device; Yet the manufacturing cost of these self-operated thermostatic controllers is higher relatively, and the temperature of therefore preferably raising the dried side of component substrate is used as the additional heating source of this purpose.
What be widely known by the people is that this component substrate can be by " adjust (tuned) " yet with the temperature of improving the adjuster on sleeve and the relation that is heated the temperature of liquid---be known that and should " adjustment (tuning) " have destroyed the required uniform temperature of milk heater.Inventor's investigation is presented at wet sides and takes uniform step, and self-operated thermostatic controller can be installed in dried side with further revising.
Figure 48 b shows the sectional view of the heating chamber 110 that is used for the milk foaming.In this case, mechanical ferrule element 202 is attached on the aluminium substrate 201, and the aluminium substrate directly is attached on the bottom 12 of wire chamber 11 more successively; Substrate 201 be configured to shown in Figure 31 a each 201.Self-operated thermostatic controller 128 is directly installed on the center of substrate 201, therefore self-operated thermostatic controller 128 can obtain advantage from the lifting temperature of substrate 201 latter stage during heating, and sleeve 202 further away from each other, therefore when device need be restarted, its can still less be dried heat effects of any parameter of side.
Other self-operated thermostatic controller be oriented to the bottom on liquid (such as milk) the most probable position of burning have good thermo-contact, for example from the off-centring of substrate 201.
Figure 33 a shows the sectional view of the heating chamber 110 similar to structure among the accompanying drawing 32a, has the self-operated thermostatic controller of installing towards the sidewall 200 and the substrate 201 of reservoir 110 simultaneously 128.Ideally, this self-operated thermostatic controller 128 should be installed in the position under reservoir 110 jet pipes, because this zone is the decline of the reservoir 110 that is removed from milk, the therefore minimum any residual heat effects that may be heated in the element board 12.The inventor finds that self-operated thermostatic controller 128 can be set at the temperature of a raising from required milk temperature, and this wall 200 is because the falling away and the interpolation of new milk and cooling rapidly of milk.
Figure 33 b shows the distortion of the embodiment among Figure 33 a, and wherein self-operated thermostatic controller 128 is installed in the outside that is positioned at the device on the component substrate 201, and 32b is described in detail as accompanying drawing.In this embodiment, expectation is positioned at substrate 201 under the self-operated thermostatic controller 128 and may operate under the temperature that is higher than position shown in Figure 33 a.Improving the termination and the temperature of reforming more can be favourable to installing, and the preferred temperature of this device is lower than 60 ℃, so this device still resets under the environment temperature around.
In all relevant embodiment, preferred, for example this bimetallic action part of self-operated thermostatic controller 128 directly contacts with device, makes and guarantees good thermo-contact.
The position of agitator, speed and running time
The milk foam maker has usually that the foam maker accessory is used for foaming milk and the agitator accessory is used for whipping milk when heating to milk.Usually be understood that in industry if foam maker or agitator have been offset the center of heating chamber, then milk foam maker or agitator are what improve.The inventor disagrees with this theory, and has determined that foam maker or agitator are concentric with element board, in other words, allow milk directly to stir on the element sleeve pipe at the center of device heating chamber 110, thereby heater operates in more low temperature.Therefore, the agitator more desired position is the center of this device.By making foam maker or agitator location near element board, and then the temperature on the sleeve pipe is lowered.
Figure 29 a to 29c schematically shows the different separately embodiment with the stainless steel reservoir 110 of substrate 201 that forms heating plate 12 and element sleeve 202.
Reservoir 110 comprises removable lid 220, wherein is combined with axle 210 and foam maker/agitator 136 successively.Lid can comprise bearing housing 211, as the supporter of axle and electromotor (not shown).Replacedly, shown in Figure 29 c, this foam maker/agitator 136 can have magnetic part 301 in its radially outer part, is driven by the solenoid 300 that has near this foam maker/agitator height that is positioned at wall 200 outsides.Coil 300 is configured to the armature of electromotor, and wherein foam maker/agitator 136 is a rotor.
Under each situation, foam maker/agitator 136 is all concentric with element sleeve 202.Under each situation, the preferred heights of the foam maker/agitator on the element board is for being 15mm and the minimum 4mm of being to the maximum.
The speed of foam maker/agitator 136 is played the part of most of role equally in processing is heated or foamed to milk.What can be determined is, the suitable speed of foam maker 136 shown in Figure 29 b under no-load condition is between 2500 and 3000 rpms, or when stirring typical load, when heating 150ml, be 1500 rpms (rpm) for example with 450 watts element.If speed too slowly will be seldom or the generation of foaming; If too fast, milk may eject from reservoir 110 owing to the foaming processing.
The radical length that increases agitator 136 can increase the peripheral speed of agitator, therefore can use the longer agitator 136 of zero motor cooperation shown in Figure 29 a.This more jogging speed can reduce since axle or any injustice of agitator very or depart from the vibration that causes at the center and can cause device quieter, more stable.
Figure 29 d, 29e and 29f illustrate the distortion of foam maker 136 respectively, and each all comprises axle 210, oar 139 and coil 138.Oar among the accompanying drawing 29d is solid, to be suitable for diluent liquid.Oar shown in Figure 29 e is hollow, allows level and smooth flowing in thicker liquid.In Figure 29 f, oar is arranged to horn shape makes action as screw, to give the liquid axial velocity and to impel liquid to stir.Oar can comprise other features in other embodiments, and for example duck eye or fine mesh are mixed or agitated liquid with assistance.Coil 138 can be set on the upper surface of oar 139, rather than shown in radial outer surface.Wherein foaming adding of milk of not needing to be used for for example to take iron (latte) coffee to use, pine for, and this coil 138 can omit together to form agitator.
The foam maker of larger diameter allows the oar 139 of coil 138 or associating to be disposed on the heater, owing to have more multithread dynamic resistance, needs more high-power motor to go to reach and satisfies the required minimum speed of foaming milk.This is just shown in Figure 29 k, have radially big oar 139 and radially littler coil 138.Shown in Figure 29 j, more low-energy if desired motor, so littler oar 139 can be preferred.Replacedly, use crooked dorsad rather than oar radially, shown in Figure 29 g and 29h, can increase the speed of required given resistance equally, and increase the Radial Flow of liquid, improve the mixing of liquid and the cooling of the element board 32 on the element sleeve.
What be used for foaming heats, and oar 139 can use under the situation that does not have coil 138.Preferably, oar 139 has the vertical direction size bigger than horizontal direction size.In one embodiment, oar 139 for diameter is 20-40mm, horizontal direction is 2-4mm, vertical direction is 5-10mm.In the embodiment shown in Figure 29 i, oar 139 is included in the relative high outer foil 139a radially of vertical direction, by coupling part, inside 139b radially, be connected to axle 210, on heater, to finish good mixing under the impedance situation minimizing at the relative weak point of vertical direction.Agitator 136 can comprise the temperature sensor that (for example centers on the zone of oar 139) towards the tip end of axle 210.This temperature sensor can for example be a thermocouple.This temperature sensor can be electrically connected to controller along axle 210.
An interchangeable or additional scheme that is used for the liquid superheat of anti-locking apparatus is that controller control agitator 136 moves short time, for example 30 seconds behind the self-operated thermostatic controller cut-off device.This guarantees that all the residual heats in the element were transferred to milk before milk is poured out, and this has reduced energy dissipation and has reduced the overshoot temperature.Successively, because element board does not reach a temperature that is raised, this is also to there being active influence resetting time.
Thick film or printed element
Embodiment above some is at the mechanical organ of lower cost.Common, the cost of manufacture of thick-film heating element is much larger than mechanical organ, and however, owing to the one or more reasons in the following reason, the performance of thick-film heating element is better:
A) low quality more, therefore after element was stopped energy supply, rudimental energy still less need be dissipated, and the possibility of being burnt of the residual milk after littler the boiling.
B) heat of crossing element board better distributes, and guarantees to cross the distribution of element board isothermal.
C) better dry combustion method control.Thick film element can comprise overtemperature protection, such as the disclosed E-Fast of WO-A-2006/083162
TMProtection or the disclosed parallel E-Fast of WO-A-2008/150172.
Investigation that the inventor finishes shows uses the thick film screen printing element with aforesaid additional PTC sensor to have further advantage.Advise the performance that these identical sensing equipments can be used to assist to promote the milk heater.
Because when temperature increased, the PTC trace was to the climbing sensitivity of liquid in the device, so resistance is measured in the PTC trace.
Disclosed experimental result demonstrates in the resistance variations (with ohm per second is tolerance) of milk between the period of heating.Resistance when cold is very low, still fast rise during initial heating; Then, be stabilized in the milk because the temperature of element dry face dissipates by heat, the resistance climbing reduces.In some cases, if if for example burn and take place or agitator does not move, heat can quite violent variation to the dissipation in the milk.
Measurement that it should be noted that actual employing is the device finished specific to test experiments, and only is used to the purpose explained.Phenomenon after the expected result can be excavated in other type of device, size and power grade, and is used for the liquid that other are heated and handle equally.
The target of this test is to form an algorithm, and this algorithm can be formed for the basis of the electronic control module of heating milk and other liquid.
How to excavate this phenomenon in order understanding, to understand the PTC sensor and under usual condition, how to react very important.
Figure 37 shows and utilizes the PTC sensor of clean element surface output milk between the period of heating.What can see is to exist to continue first initial temperature fast rise of 3.5 seconds.Climbing is near 105 ohm of per seconds in this example.After initial fast rise, sensor signal is climbed with the almost constant climbing near the climbing of 12 ohm of per seconds.The peak value of resistance of cut-out point is 12150 ohm.
For relatively, further be operated under the situation of different packed height 65ml to 130ml and 495 watts to 577 watts of different power grades, on same device, carry out.Find the only small difference of key measurement of specific temperature rise.Factor between the minimum and maximum packed height is 1.4, and the factor between maximum wattage and the minimum wattage is 1.2.
Figure 38 shows the reaction of sensor in 10 seconds the dry combustion method in that device is switched on is tested when heating chamber adds any milk.The horizontal shading line adds 12150 ohm of places in the drawings, is the highest ranking under the usual conditions herein.
In order to determine do not have milk to exist, this algorithm can use rate of change to detect or restriction detects or both combinations.
It is 270 ohm of per seconds that Figure 38 shows first rate of change of 3.5 seconds, and it is significantly higher than the initial rate of change of 105 ohm of per seconds measuring under the ordinary milk heating mode.If climbing, for example doubles 210 ohm of per seconds of this initial climbing fully greater than the normal operations finding, can stop power supply based on the electronic controller of this ascent algorithm rate of change.Controller can calculate one second climbing at interval, fast detecting dry combustion method situation.
Replacedly, useful introducing for example 3.5 seconds delay control is handled, and has existed then climbing will just begin after will stablizing if make to detect up to liquid.This is because user's possibility for the purpose that cleans, when heating different liquid (for example water), can during heating remove or unclamp agitator; Any one of them all can cause climbing to increase to the contingent point of tedious mistake.In this case, whether climbing has begun to stablize after postponing in 3.5 seconds controller meeting sensing, if this does not exist, such as, taking place in 1.5 seconds the time frame, the power supply of element can be interrupted.In this stage, climbing can be slack-off under dry-fire condition, but still can be suitable be higher than climbing when having liquid, therefore expect that the climbing of 75 ohm of per seconds can become the standard that device stops energy supply.The time of power cutoff can be near 5 seconds.
In a further embodiment, threshold test can be used, and threshold criteria is arranged to be higher than the highest level that ordinary milk reached between the period of heating.Threshold value is set to 12400 ohm and interrupts power supply after can be in the time of about 7 seconds, is slower than the climbing reaction time, yet this helps the design performance/demand of thick film element and still suitable for equal electromechanical controller.
More advantageously, if when milk is heated, under any reason, device can not turn-off, and the climbing of expansion and threshold can provide further safeguard protection.When the milk of q.s is boiled, the rising that component temperature can be suitable.In Figure 40 in the detailed experiment of showing; power supply is detected in the near future at Failure Mode and is manually turn-offed; but what can see is; resistance increases fast with the climbing of 150 ohm of per seconds and surpasses 12400 ohm threshold value, so climbing or threshold method can provide suitable protection under the pattern of the serious failure of this safety.
In each of these examples, the difference of rate of change is considerably experienced greater than minimum and maximum capacity and wattage test period, therefore expects that this method is reliable when gamut is used.
Detecting element plate wet sides milk precipitates burn more difficult finishing.In order to understand this difficulty, be provided with an experiment, wherein milk heater stands during five continuous milk foaming, and this experiment is making after the milk residue is during each precipitatedly, and all carries out under the situation without any cleaning between during each.Under these situations, milk precipitates can demonstrate the sign of overheating during quite objective the 5th.
The climbing that Figure 41 shows during the aft section during five is basic identical, although the initial initial resistance of element is higher, initial high climbing continues longer, and the signal of final PTC sensor is obviously higher.
Figure 42 shows first 20 seconds the snapshot (snapshot) during each, helps paying close attention to the 6 second period (between 6 seconds and 12 seconds) during each.This is after the fast rise rate and the period of climbing before stable.Can see, during 1, this end during 6 seconds, climbing is stable to 12 ohm of per seconds, it is very near keeping the climbing of remaining period, however the climbing during the 5th is higher than 31 ohm of per seconds and no longer begins to stablize.
The increase of the climbing during this 6 second period and increase and skew initial resistance are the results that the milk precipitates on the element board wet sides causes.Gradient during the 5th is greater than 2.6 times between the first phase.
More early mention, the ratio of packed height scope and power grade is respectively 1.4 and 1.2, therefore expects to have enough safety allowances so that checkout equipment can be used as the basis of the accumulation of the milk precipitates on the recognition component.This method can be in conjunction with running through the threshold test of measuring between the whole period of heating.For example in accompanying drawing 41, initial sensor values is 10860 ohm between the first phase, and it differs 1301 ohm increasing to 12161 ohm during this period.2 differ 1446 ohm during this time, differ 1860 ohm than increasing to during having increased by 15%, the 5 between the first phase, than having increased by 43% between the first phase.
Can on production line, move test period threshold value is set.In case base region is known, 3 and 4 being seen base regions 30% during for example setting is higher than then, heating to be given the user.Algorithm can be set, and be done during therefore allowing, but give signal of user: container need be cleaned, as using the LED flicker.
An example of this algorithm comprises the feature shown in the flow chart shown in Figure 43 a and 43b.This algorithm reference value of supposition (or a plurality of reference value) is stored during first production line operation of unit.Equally also passable is that control module calculates second reference set by the user in " going out box " operating period at first.
What be additional to this is, is favourable with reference to NTC thermistor 14 during the initial start of unit on the production line and PTC sensor trace 30 resistance values, can help to decide the house temperature of PTC sensor resistance of traces.This single reference can help to reduce the effect spread that has of sensor offset, and this skew is in the reality because the deviation of typography produces when producing in batches.The slope of sensor characteristics is set by the TCR of material, and it can not change in batch process too much, but alters a great deal in difference is criticized.
Use a problem of printed sensor to be that the deviation of material and technology can cause the room temperature resistance (resistivity deviation) of sensor trace 30 and temperature variant resistance change rate (TCR deviation) to have suitable significant difference.
A method of improving this is to carry out at 2 with reference to checking.NTC sensor 14 can have the tolerance littler than printed sensor 30.When device was tested on production line, testing software extracted the resistance initial reading of NTC and PTC sensor 14,30 before element 12 is activated.PTC sensor electrical resistance can be extracted under the temperature identical with NTC sensor electrical resistance, provides one first reference point.This can not be a concrete temperature, but more accurate stands for room temperature value.Element is started then to heat a certain amount of water.Heating and whipping procedure are carried out, in case NTC sensor 14 is detected target temperature (for example, the milk foam maker is near 70 ℃) then, element is closed.During this time, second reference value obtains from PTC sensor 30.The actual temperature of PTC sensor 30 may be higher than the temperature of NTC sensor, because the PTC sensor is adjacent to the heater trace.But, therefore testing element can obtain the reference value of two PTC sensors, can allow the calculating of the threshold value of fixed value or rate of change.These threshold values can be used for above-mentioned algorithm and burn to detect dry combustion method or milk.
Test demonstrates whether initial climbing is stirred according to liquid and different, is 140 ohm of per seconds when for example stirring, and not stirring is 190 ohm of per seconds.Advantageously, this difference can be used for detecting agitator or whether foam maker is failure to actuate, for example because agitator or foam maker motor are not assembled on the individuality.In response to this detection, further heating is suppressed or reduces, or indicator can make the user know that agitator does not exist, and for example uses the LED illumination.
The embodiment that replaces
The invention is not restricted to kettle, milk foam maker or agitator, and heating element heater; The each side of this invention can be applicable to other liquid heating and/or stirs foam device, such as kettle, coffee making device (such as mocha and espresso maker), Turkey's tea maker, samovars (Muscovite a kind of device of heating up water and warming oneself), kettle teapot, pan, condiment, hobboing cutter, steamer, chocolate shower nozzle, fondue, food steamer (steamers), high pressure cooking pan pot, electric iron, food processor, mixer, fruit juice mixer, submissive device (smoothie maker).The each side of invention can be applicable to liquid distributor, for example uses pump or sprays dispense liquid.
Above-mentioned specific embodiment is for reference only described, and many modifications or variation all can fall in the scope of appended claim.