Abstract:
Automatic coffee machines have very low thermal efficiency because they have to heat a considerable thermal mass, constituted by the heater 3) appearing in Figure 1, which has a weight generally ranging between 0.5 and 1 Kg of metal, typically consisting of aluminium. Said mass is used to stabilise the temperature of the water to be injected in the blend of coffee. In this configuration, 90% or more of the thermal energy is wasted. The energy saving coffee machine, the subject matter of the present invention, is instead constructed with a heater 3), appearing in Figure 4, that has a thermal mass much lower than the mass of the liquid to be heated, and is typically constructed with metal tube 30), as shown in Figure 4, weighing a few grams. The heating current 41) in Figure 4 flows directly on said tube, heating it together with the water contained therein, while a very rapid temperature control circuit makes it possible to maintain a constant temperature of the water flowing through the heater 3) shown in Figure 4. Temperature measurement is carried out by monitoring the resistance of the tube 30) shown in Figure 4, at the times in which the heating current 41) is not passing through the latter. In this manner, high energy efficiency is obtained, in that the dispensing of the coffee begins immediately upon pressing the start push button 48) and the machine is kept completely switched off between the dispensing of one cup of coffee and the next.
Abstract:
A flow-heating system for liquids, in particular for producing hot water or steam, equipped with at least one thermal protection accommodated at the end of the electric heater (8). Such a heating system comprises at least two tubes thermally connected to each other or forming part of a single structure obtained by extrusion. One of the tubes allows the water to pass, the other or others accommodate the heating resistive wire (5). The thermal protection or thermal fuse (1) is assembled at the end of the electric heater (8) as described below. It is engaged on a connector (2), which is mechanically and electrically connected in turn to an electric connection (3) coined on the inner connector (4) on which the resistive wire (5) of the electric heater (8) is welded.
Abstract:
A beverage maker includes a reservoir; a heater for heating water in the reservoir from a starting temperature to a brewing temperature; a temperature sensor for sensing the temperature of the water and the heater; a pump connected to the reservoir for pumping hot water from the reservoir at the brewing temperature to a user's cup via an infusible food material; and a controller adapted to operate the pump over a predetermined pumping time based at least in part on the time interval to bring the water temperature in the reservoir from the starting temperature to the brewing temperature. The controller may also be programmed to turn said heater on, turn said pump on when the water temperatures reaches said brewing temperature, and turn said heater and pump off when said temperature sensor senses another temperature higher than said brewing temperature.
Abstract:
Die Erfindung betrifft eine Kaffeemaschine, insbesondere Espresso- oder Kaffeepad- Maschine, mit einem elektrischen Durchlauferhitzer (22) zum Erhitzen von mittels einer Pumpe aus einem Vorratstank (20) gefördertem Wasser, welches nach Erhitzung zur Kaffeebereitung unter Druck in eine Brühkammer (24) geleitet wird, die eine Austrittsdüse (40) zum Auslauf des bereiteten Kaffees aufweist, mit wenigstens einem Messfühler zur Erfassung eines mit der Temperatur des erhitzten Wassers korrelierten, elektrischen Messwertes, und mit einem Steuersystem zur Steuerung der Pumpleistung der Pumpe und/oder der Heizleistung des Durchlauferhitzers (22) in Abhängigkeit von dem Messwert. Um eine gattungsgemäße Kaffeemaschine derart zu verbessern, dass eine Verstopfung der Düse (40) erkannt und gefahrlos beseitigt werden kann, wird vorgeschlagen, dass das Steuerungssystem, wenn der Messwert eine Größe außerhalb vorbestimmter Grenzen annimmt, die Pumpleistung und/oder die Heizleistung abschaltet und ein Wiedereinschal- ten der Pumpleistung und/oder der Heizleistung für eine spezifizierte Sperr-Zeitspanne durch Aktivierung von Sperrmitteln sperrt. Durch die erfindungsgemäße Ausgestaltung wird erreicht, dass eine Verstopfung der Düse (40) erkannt und gefahrlos beseitigt werden kann. Die Erfindung betrifft weiter ein entsprechendes Steuerungsverfahren für eine Kaffeemaschine.
Abstract:
The invention relates to a timer- and temperature-controlled electric coffee-maker. The aim of the invention is to improve an electric coffee-maker in such a way that the risk of fire especially in electric coffee-makers with an automatic electronic time control is avoided to a large extent. To this end, a control device (5) is disposed in the electric coffee-maker, said control device switching on the instantaneous water heater (2) after a period selected by the user, measuring the time needed to reach a given temperature and switching off the instantaneous water heater (2) if a given period is not reached.
Abstract:
A water heater for use in a beverage maker comprises a moulded body (4) having a water inlet (12) and outlet (14) and with a thick film heater (8) closing one face of the body (4). The heater (8) comprises a plurality of tracks (34, 36, 38) which are connectable together in different configurations to give a desired heating power. This is effected by a rotary control member (120) mounted to one side of the body (4) which lifts leaf springs (60, 62, 64) on and off heater terminal pads (40, 48, 50). A removable plug (10) closes an aperture which allows scale to be removed from the heater.
Abstract:
Device (10), comprising a platform (14) for placing a vessel (9) containing the liquid, a pipe (15) with an open end (151) configured for supplying steam to the vessel, a driving device (17) configured to actuate a relative movement between the end of the pipe and the platform, means (140) for determining a liquid level of the liquid in the vessel, and a control unit (18). The control unit is configured to actuate the driving device (17) so that a relative initial position between the end of the pipe and the platform is assumed on the basis of the liquid level. The means (140) for determining the liquid level comprise a weighing device. The control unit is then configured to determine the liquid level from the weight.
Abstract:
The invention relates to a domestic appliance, such as a steam iron or a coffee making apparatus. Such appliances comprising a housing, a water reservoir, an actuator, for example, plunger pump and a boiler for providing hot water or steam for an appliance. An input of the plunger pump is connected to the water reservoir, an output of the plunger pump is connected to an inlet of the boiler. In operation, the plunger pump is reciprocating at the mains frequency. The operating plunger pumps introduces vibrations which are transmitted to the housing and radiated by the housing to the environment which cause soundsand noise which are not user friendly. In order to reduce the sound and noise the domestic appliance comprises a base frame, an actuator connected to the base frame, the actuator being provided with a drive member and the actuator being arranged for reciprocating movement of the drive member, wherein the domestic appliance further comprises a sub frame and a resilient member, whereby the actuator is mounted on the sub frame and the resilient member is arranged between the sub frame and the base frame for moveably mounting the sub frame at the base frame.
Abstract:
一种优质热水的快速制备方法及装置,该优质热水的快速制备方法包括如下步骤:步骤a)根据T=T cm -T R +x公式计算出升温变量T,T R 、x为预设常数,并在管道加热器(4)系列升温曲线中寻找满足T≤TH j 的相应流量L j ,TH j 为流量L j 时的最高升温值;步骤b)以设定流量L j 的水进入管道加热器(4),再由水流量L j 对应的管道加热器(4)的加热升温曲线对捕捉升温变量T,找到相应的处于慢速升温非线性加热区Κ区内的任一时间点所对应的管道加热器(4)的相邻加热功率对,并用选定的相邻加热功率对的其中之一的加热功率进行加热;步骤c)测量步骤b)中管道加热器(4)出水端口(GB)处水温T c ;当t≥t 1 时,计算出出水端口(GB)处目标水温T cm 和出水端口(GB)处水温之间的偏差值y=T cm -T c 。,同时将y和已设定的目标水温最大允许偏差值C p 进行比较,当偏差值|y|>C p 时,将偏差值y再加原始补偿值x得到新的补偿值x,再进行步骤a)、步骤b);当偏差值|y| p 时,继续进行步骤b)。
Abstract:
A beverage preparation machine comprises: a heater (1) for heating up a supply of liquid from a supply temperature to a beverage preparation temperature, in particular an in-line heater and/or a heat accumulation structure such as a thermoblock; and a control unit (2) for controlling said supply of liquid and the heater so that the heater is energised to reach and be maintained at an operative temperature ("RUN") for heating up said supply of liquid to the beverage preparation temperature during beverage preparation. The control unit is further arranged so that the heater is energised to reach and be maintained at a reduced temperature ("ECO") out of beverage preparation.