The present disclosure is generally directed to a kitchen appliance for preparing a beverage from foodstuff, and, more particularly, to a kitchen appliance for preparing a hot beverage capable of determining and displaying a measurement of the foodstuff placed in the appliance, such as the number of scoops of foodstuff inserted in the appliance.
Kitchen appliances for preparing a beverage are well known. One example of such a kitchen appliance is a coffee maker, which prepares coffee from coffee grounds. Some coffee maker consumers prefer to prepare the coffee maker, i.e., insert the coffee grounds and water into the coffee maker late at night such that the coffee maker solely needs to be powered on the following morning to brew the coffee. Alternatively, other consumers prefer to both prepare and power on the coffee maker early in the morning or at the time they desire coffee. Whether preparing the coffee maker in the morning, evening, or any time of day, consumers may be preparing the coffee maker to brew coffee for several individuals, e.g., multiple family members or guests.
Often, due to distraction or any other reason, and especially when preparing many cups of coffee, consumers forget, miscount, or lose count of the number of coffee scoops that have been inserted into the coffee maker. One disadvantage of conventional coffee makers, as well as other kitchen appliances used to prepare a beverage from foodstuff, is that once the consumer no longer knows the number of scoops inserted into the appliance, the consumer generally must empty the appliance of the inserted, unknown quantity of foodstuff, and begin inserting foodstuff again. Otherwise, they proceed at the risk of making coffee that is not suitable to their or other's tastes. Such a process is tedious, time-consuming, and generally frustrating to the consumer.
Therefore, it would be advantageous to have a kitchen appliance for preparing a beverage from foodstuff, capable of determining and displaying the number of scoops of foodstuff that have been inserted therein. Accordingly, whenever a consumer forgets, miscounts, or loses count of the number of scoops of foodstuff in the appliance, a display on the kitchen appliance notifies them, eliminating the need to keep count or empty the appliance and restart the filling process.
Briefly stated, one aspect of the present disclosure is directed to a hot beverage maker. The hot beverage maker comprises a hot liquid generator for receiving a liquid, including at least one heating element for heating the liquid, and a reservoir for receiving an amount of foodstuff. The reservoir is in fluid communication with the hot liquid generator for receiving the hot liquid generated thereby. The hot liquid is infused by the foodstuff thereby generating a hot beverage. The reservoir has an outlet for dispensing the hot beverage. The hot beverage maker further includes a sensor for sensing the weight of the foodstuff in the reservoir and for generating and outputting electrical signals proportional to the weight of the foodstuff, and a controller for receiving the electrical signals from the sensor and determining a measurement of the foodstuff placed in the appliance, such as the number of scoops of foodstuff present in the reservoir according to the sensed weight of the foodstuff.
Another aspect of the present disclosure is directed to a method of operating a hot beverage maker. The hot beverage maker includes a hot liquid generator for receiving a liquid, including at least one heating element for heating the liquid, and reservoir for receiving an amount of foodstuff. The reservoir is in fluid communication with the hot liquid generator for receiving the hot liquid and making the hot beverage. The reservoir has an outlet for dispensing the hot beverage. The hot beverage maker includes a sensor for sensing weight of the foodstuff in the reservoir and generating and outputting electrical signals proportional to the weight of the foodstuff, and a controller for receiving the electrical signals from the sensor and determining a number of scoops of foodstuff present in the reservoir according to the sensed weight of the foodstuff. The method of operating the hot beverage maker comprises the steps of: (a) inserting foodstuff into the reservoir, (b) calculating, using the controller, a number of scoops of foodstuff in the reservoir, and (c) repeating steps (a) and (b) until a desired number of scoops are present in the reservoir.
The foregoing summary, as well as the following detailed description of the disclosure, will be better understood when read in conjunction with the appended drawings. For the purpose of illustrating the disclosure, there is shown in the drawings an embodiment of a kitchen appliance which is presently preferred. It should be understood, however, that the disclosure is not limited to the precise arrangements and instrumentalities shown. In the drawings:
Certain terminology is used in the following description for convenience only and is not limiting. The words “lower,” “bottom,” “upper” and “top” designate directions in the drawings to which reference is made. The words “inwardly,” “outwardly,” “upwardly” and “downwardly” refer to directions toward and away from, respectively, the geometric center of the kitchen appliance, and designated parts thereof, in accordance with the present disclosure. Unless specifically set forth herein, the terms “a,” “an” and “the” are not limited to one element, but instead should be read as meaning “at least one.” The terminology includes the words noted above, derivatives thereof and words of similar import.
It should also be understood that the terms “about,” “approximately,” “generally,” “substantially” and like terms, used herein when referring to a dimension or characteristic of a component of the disclosure, indicate that the described dimension/characteristic is not a strict boundary or parameter and does not exclude minor variations therefrom that are functionally similar. At a minimum, such references that include a numerical parameter would include variations that, using mathematical and industrial principles accepted in the art (e.g., rounding, measurement or other systematic errors, manufacturing tolerances, etc.), would not vary the least significant digit.
Referring to the drawings in detail, wherein like numerals indicate like elements throughout,
As shown in
The housing 12 includes a recess 14 (
As shown schematically in
The cavity 16 is preferably sized, shaped and/or configured to receive at least an amount of liquid that is suitable for preparing multiple cups of the beverage, e.g., preferably between about two to eight or even twelve cups. As shown in
The hot liquid generator 18 can be any mechanism capable of heating a fluid such as a generally U-shaped (in side view), tubular, aluminum extrusion, boiler, spiral heater, or the like. The at least one heating element 20 is in thermal communication with liquid in the hot liquid generator 18. The heating element 20 can be, for example, without limitation, a cal-rod or other resistive heating element. Such a heating mechanism is a generally inexpensive means for heating and motivating liquid in a non-mechanical manner (i.e., no impellers, air pump, or the like), as described further below. Alternatively, the hot liquid may be moved through the kitchen appliance 10 via a pump (not shown), such as, for example, a positive displacement pump, a water pump or an air pump. Likewise, the heating element 20 may alternatively be any of numerous different heating elements, currently known or that later become known and capable of performing the function of the heating element 20 as described herein. The heating element 20 is preferably located outside of, and in contact with, the hot liquid generator 18 to heat the liquid therein. However, the heating element 20 may alternatively be located inside the hot liquid generator 18, in direct physical contact with the liquid. An outlet 18b of the hot liquid generator 18 is connected in fluid communication with the reservoir 22 via a generally upwardly extending riser tube 28. As shown in
As should be understood by those of ordinary skill in the art, the hot liquid generator 18 and the heating element 20 are preferably capable of heating liquid therein to at least a temperature sufficient to create a phase change of at least some of the liquid into gas. Such a phase change creates or generates the force(s) necessary to move fluid throughout the kitchen appliance 10 to make the beverage. Accordingly, when liquid is poured into or is present in the cavity 16 and the heating element 20 is not activated or energized (e.g., pulsed), liquid travels into the hot liquid generator 18 and at least partially into the riser tube 28 until an equilibrium level of the liquid is achieved. In other words, the height of liquid proximate the inlet 18a of the hot liquid generator 18 is generally equal to the height of liquid proximate the outlet 18b of the hot liquid generator 18.
The hot liquid generator 18 can be a gravity-fed device, in which liquid enters therein due to the force of gravity. Thus, at least a portion of the cavity 16 is preferably positioned at a level or height that is higher than the hot liquid generator 18 to provide positive head pressure to fill the hot liquid generator 18 with liquid from the cavity 16. A level or height of a top of the cavity 16 could be lower than a level or height of an entry point to the showerhead 30 so that liquid does not flow into the showerhead 30 prior to activation of the heating element 20.
Once at equilibrium in the kitchen appliance 10, fluid motivation during a brew or heat cycle occurs solely due to a phase change of the fluid that occurs in the hot liquid generator 18 during operation. Shortly after the heating element 20 is activated or energized, a temperature of at least the liquid in the hot liquid generator 18 begins to rise. Eventually, the liquid begins to boil and experiences or exhibits a phase change from liquid to gas, which increases pressure within the hot liquid generator 18. Pressure created from the gas attempts to push liquid out of the hot liquid generator 18. Due to the check valve 26 preventing liquid within the hot liquid generator 18 from entering the cavity 16, the riser tube 28 offers the least resistance to the rising liquid. Therefore, the pressure pushes at least some liquid out of the hot liquid generator 18 through the outlet 18a, upwardly through the riser tube 28, out through the showerhead 30 and into the reservoir 22. The check valve 32 in the riser tube 28 prevents the liquid therein from flowing back into hot liquid generator 18. Activation or pulsing of the heating element 20 continues and/or repeats until all or substantially all of the liquid in the system is displaced from the cavity 16 to the reservoir 22.
The specific brewing mechanism can vary as would be understood by one of ordinary skill in the art. Therefore, as discussed previously, the hot water generator can be a boiler that is fed by a pump or any number of variations in the mechanism by which the beverage maker delivers hot fluid to a foodstuff in the reservoir 22.
Referring now to
When properly inserted in the weighing platform 22a, a dispensing valve 56 of the basket 22a projects through the outlet 50 of the weighing platform 22a. The dispensing valve 56 operates as an automatic pause and serve feature of the kitchen appliance 10, in a manner well known in the art. That is, as should be understood by those of ordinary skill in the art, the valve 56 is spring loaded into a normally closed position (
Each slot 52 of the weighing platform 22a includes a spring loaded support 58, biased to support the basket 22b when inserted into the weighing platform 22a to a relatively upward position such that the dispensing valve 56 does not contact a carafe in the recess 14, as will be explained further below, and thus the dispensing valve 56 remains in the normally closed position. As shown in
Referring now to
As shown schematically in
Generally, the microprocessor 36 periodically receives, e.g., once every five or ten milliseconds, data from the level sensor 42 (known in the art and operatively connected to the hot liquid generator 18 in a manner well known in the art), correlating to a level of the liquid present in the hot liquid generator 18 to determine whether sufficient liquid is present therein. If the microprocessor 36 determines that the level of liquid in the hot liquid generator 18 is sufficient, the microprocessor 36 activates the heating element 20 to heat the liquid. The microprocessor 36 also periodically receives, e.g., once every five or ten milliseconds, data from a heat sensor 44 (known in the art and operatively connected to the hot liquid generator 18 in a manner well known in the art), correlating to the temperature of the liquid present in the hot liquid generator 18, to detect whether the liquid has reached a sufficient temperature. Typically, the microprocessor 36 activates the heating element 20 until the liquid within the hot liquid generator 18 is at or near the boiling point temperature thereof to create a phase change of at least some of the liquid into gas. As should be understood, the lever sensor 42 and the heat sensor 44 generally include integrated analog to digital converters. Thus, measured analog signals are converted to digital signals prior to transmission to the microprocessor 36. Alternatively, measured analog signals by the lever sensor 42 and/or the heat sensor 44 may be communicated to external analog to digital converters prior to communication to the microprocessor 36.
The microprocessor 36 also receives signals from the load cell 34. Namely, the reservoir 22, supported in the housing 12 solely by the load cell 34, applies an unquantified amount of force onto the load cell 34. The load cell 34 converts the unquantified amount of force into electrical signals in a manner well known in the art. That is, strain on the load cell 34 is measured by strain gauges therein according to the deflection of the load cell 34 caused by the weight of the reservoir 22, and converted into electrical signals, e.g., millivolts. The load cell 34 periodically transmits the electrical signals to the microprocessor 36. An analog to digital converter 46 converts the analog electrical signals into digital signals for use by the microprocessor 36.
The microprocessor 36 scales the data received from the load cell 34, in a manner known in the art, to quantify the force applied by the weighing platform 22a and everything therein onto the load cell 34. As known, force is measured in Newtons, which equals 1 kg·m/s2. The microprocessor 36 thereafter calculates the mass, i.e., the weight of the weighing platform 22a and everything therein, according to the formula: mass (kg)=calculated force (kg·m/s2)/acceleration due to gravity (9.8 m/s2). In a preferred embodiment, the microprocessor 36 converts the mass in kilograms to grams by multiplying the mass in kilograms by a factor of 103. Once the mass in grams is determined, the number of scoops of foodstuff in the reservoir 22 can be calculated, as explained further below, and the microprocessor 36 communicates the calculated number of scoops to the display 38 for display.
Referring primarily to the flow diagram of
At 102 the consumer swivels the showerhead into the non-operating position, i.e., disengaged from the ramp 60 and not overlying the basket 22b, to unlock the scale. Once unlocked, the spring loaded support 58 biases the basket 22b to the relatively upward position. Accordingly, neither the showered head 30 nor the carafe positive influences measurements of the load cell 34. The load cell 34 measures and communicates data to the microprocessor 36 correlating to the weight of the weighing platform 22a itself and the empty basket 22b therein. This is because the weighing platform 22a is supported solely by the load cell 34. Thus, at 104 the consumer presses the reset button 66, instructing the microprocessor 36 to tare the number of scoops N to zero. That is, the microprocessor 36 equates the measured weight of the weighing platform 22a and the empty basket 22b therein with the presence of zero scoops of foodstuff in the basket 22b. Weight is calculated by the microprocessor 36, preferably in grams, based on the periodic electric signals received from the load cell 34 in the manner previously described. At 106, the microprocessor 36 instructs the display 38 to display the number of scoops N. Thus, the first time the display 38 displays the number of scoops N, it will display zero.
At 108, the microprocessor 36 determines whether the number of scoops N equals the maximum number of scoops MAX that the basket 22b is intended to receive. In a preferred embodiment, the intended maximum number of scoops MAX is 16 scoops. However, as should be understood by those of ordinary skill in the art, the maximum number of scoops may be altered (by reprogramming the microprocessor 36), to be more or less. If the microprocessor 36 determines that the number of scoops N is less than the maximum number of scoops, (i.e., NO as shown in
If the consumer decides that the number of scoops N of foodstuff present in the basket 22a and displayed on the display 38 is the desired number of scoops, the consumer swivels the showerhead 30 back into the operating position at 122, to re-lock the scale. Otherwise, if the consumer desires more scoops of foodstuff, the consumer adds additional amounts of foodstuff to the basket 22b at 112. At 114, the microprocessor 36 continues reading the signals periodically received from the load cell 34 and records the calculated current weight WT of the contents of the basket 22a as weight W.
At 116, the microprocessor 36 determines whether the current weight W minus the initial weight WN is equivalent to one scoop. In a preferred embodiment, one scoop of foodstuff is equivalent to approximately 5 grams of foodstuff. However, as should be understood, one scoop may be equated with more or less foodstuff. Accordingly, the microprocessor 36 only determines that an additional scoop of foodstuff has been added to the basket 22b when the WT minus WN is approximately 5 grams. In a preferred embodiment, the microprocessor 36 only communicates to the display 38 an increase in full scoop increments and the display 38 displays number of scoops N in full scoop increments. Accordingly, in a preferred embodiment, the microprocessor 36 first instructs the display 38 to display that one scoop of foodstuff is present in the basket when approximately a first 2.5 grams of foodstuff are added to the basket 22b. Thus, for example, the microprocessor instructs the display 38 to display 0 scoops up to about 2.5 grams of foodstuff present in the basket 22b. Between about 2.51 grams to about 7.5 grams, the microprocessor instructs the display 38 to display 1 scoop. Between about 7.51 grams to about 12.5 grams, the microprocessor instructs the display 38 to display 2 scoops. However, as should be understood by those of ordinary skill in the art, the microprocessor 36 may alternatively calculate half scoops, or different fractions of a scoop, and instruct the display 38 to display that amount of scoops.
At 118, if the microprocessor 36 determines that the current weight WT minus the previous weight WN is equivalent to one scoop, the microprocessor changes the number of scoops N to N+1. Then at 106, microprocessor instructs the display 38 to display N scoops. Otherwise, if the microprocessor determines that the current weight WT minus the previous weight WN is not equivalent to an additional scoop, the consumer continues to add foodstuff at 112 and steps 112 to 116 are repeated. Steps 106 to 118 can be repeated until at 108, the microprocessor 36 determines that the intended maximum number of scoops MAX is present, or the consumer reaches the desired number of scoops at 130.
If at 108, the microprocessor 36 determines that the intended maximum number of scoops MAX is present, e.g., about 16 scoops, the microprocessor 36 instructs the display 38 to display MAX, e.g., in a flashing manner, at 120. In this instance, or if the consumer otherwise reaches the desired number of scoops before the intended maximum number of scoops is reached at 130, the consumer swivels the showerhead 30 back into the operating position at 122, to re-lock the scale. Swiveling the showerhead 30 back into the operating position also depresses the basket 22b into the relatively depressed position, such that a cover of the carafe contacts and opens the dispensing valve 56. Thereafter, at 124, the consumer pushes the brew button 64, i.e., start making the beverage, and the beverage is made at 126. To make the beverage, the hot liquid reaches the showerhead 30 in the manner previously described, and is dispensed atop the foodstuff in the basket 22b. The hot liquid flows through the foodstuff in the basket 22b, picking up the essence of the foodstuff (i.e., brewing) on the way down into carafe in the recess 14, through the dispensing valve 56. Once the consumer is finished using the kitchen appliance 10, the consumer may press the on/off button 62 to power off the appliance at 128.
It will be appreciated by those skilled in the art that changes could be made to the embodiment described above without departing from the broad inventive concept thereof. For example, a sensor 34 may be similarly used with respect to the cavity 16 to measure the weight of the liquid therein. Likewise, a sensor 34 may be similarly used with respect to the carafe, to measure the weight of the brewed beverage therein. With the data measured by the sensor 34 the controller 36 can provide different forms of feedback to a consumer via the display 38. For example, a light may turn on when a sensor 34 senses that adequate liquid has been inserted in the cavity 16. Alternatively, or additionally a light may turn on when a sensor 34 senses that the weight of the carafe indicates that the brewing cycle has completed. As another option, the kitchen appliance 10 may make a sound, rather than displaying a light. Additionally, all data collected by the controller 36 from the sensor(s) 34 can be utilized to control the brewing process. It is understood, therefore, that this disclosure is not limited to the particular embodiments disclosed, but it is intended to cover modifications within the spirit and scope of the present disclosure as defined by the appended claims.