JPS61272021A - Coffee brewer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a coffee boiler that is equipped with a coffee grinder that grinds coffee beans, and that pours hot water into the coffee powder ground by the coffee grinder to extract coffee. It is related to.

BACKGROUND OF THE INVENTION A conventional coffee boiler of this type is, for example,
As shown in Japanese Utility Model Publication No. 49718 and Japanese Utility Model Publication No. 10512/1983, the time for grinding coffee beans is set by the user using a time switch.

Problems to be Solved by the Invention However, as in Japanese Utility Model Publication No. 58-49718, when the coffee bean grinder and the container for storing the ground coffee powder are different, the grinding time set by the user is Depending on the length of , the crushing member and motor rotate idly,
There were problems in that the durability was significantly shortened and beans remained in the grinder.

Furthermore, as in Japanese Utility Model Publication No. 60-10512, when the grinder and coffee powder storage container are used together, the particle size of the ground coffee powder changes depending on the length of the grinding time, resulting in a delicious flavor with an appropriate density. There was a problem that it was not possible to obtain a coffee drink that tasted good.

The present invention solves these problems and aims to provide a coffee boiler that does not require the user to select and set the grinding time depending on the amount of coffee beans.

Means for Solving the Problems In order to solve the above problems, the present invention provides a detection means for detecting the end of grinding by detecting a current flowing through a motor that drives a grinding member that grinds coffee beans, and this detection means. and switching means for switching from energization to the motor to energization to the hot water supply means based on the output.

Function: With this configuration, there is no need for the user to select and set the grinding time depending on the amount of coffee beans, and the appropriate coffee powder particle size is automatically obtained, so the coffee is always delicious and has an appropriate strength. It is possible to obtain a coffee drink with a good taste.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings. In FIGS. 1 and 2, reference numeral 1 denotes a mill switch, and this mill switch 1 is provided so as to be interlocked with a lid 3 of a crusher 2 to ensure safety. 4 is a motor that constitutes the grinder 2 and drives the cutter 6 that grinds coffee beans; e is a current transformer that detects the end of grinding by detecting the current flowing to the motor; this current transformer 6 and the mill The switch 1 and the motor 4 constitute a coffee bean grinding circuit.

7 is a thermostat, and this thermostat 7 is located near the heater 8 and controls the temperature at which the extracted coffee beverage is kept warm. Reference numeral 9 denotes a temperature fuse for preventing excessive temperature rise, and this temperature fuse 9, the thermostat 7, and the heater 8 constitute a hot water supply circuit.

Now, if you put coffee beans in the grinder 2 and turn on the electricity,
The motor 4 rotates and drives the cutter 5 to crush the coffee beans. The ground coffee powder passes through a filter 10 and is stored in a paper filter 12 placed in a coffee powder storage container 11. When there are almost no coffee beans in the grinder 2, the motor 4 is in a no-load state. This can be explained in terms of the current flowing through the motor 4. At the beginning of the drive, the coffee beans are rough and the grinder 2 is full, so a current of 2 A flows through the motor 4, for example. As the beans are crushed by the cutter 5, the particle size becomes finer, so the load on the motor 4 is reduced and the current is also reduced. Further, as the coffee powder moves through the filter 10 and into the coffee powder storage container 11, the load on the motor 4 decreases more and more, leading to idle rotation. The current value at this time is 1
It will be about A. This change in current value is detected by the current transformer 6, and the control circuit 13 operates the relay 14 and switches the changeover switch 16 when the current value falls below the initially set value or when the current value reaches stable saturation. I am trying to switch to the hot water supply circuit rather than the motor circuit.

In addition, to ensure safety when motor 4 is locked,
A motor is connected to the current transformer 6.

-4 detects an abnormal value of the current flowing through the control circuit 13.
The switch 16 is opened to cut off the power to the motor 4.

Reference numeral 17 denotes a display, which operates the coffee brewer by turning on the switch 16 at a predetermined time according to the timer function in the control circuit 13, and displays the operating status and time. . 18 is a tank that stores water.

Effects of the Invention As described above, according to the present invention, there is provided a detection means for detecting the end of the grinding by detecting the current flowing through the motor that drives the grinding member for grinding coffee beans, and a detection means for detecting the end of grinding by detecting the current flowing through the motor that drives the grinding member for grinding coffee beans, and the output of the detection means for controlling the grinding motor. Since it is equipped with a switching means that switches from energizing to energizing the hot water supply means, there is no need for the user to select and set the grinding time depending on the amount of coffee beans, and the appropriate coffee powder particle size is automatically obtained. It will be done. As a result, a delicious coffee beverage can be obtained with a simple operation.

[Brief explanation of the drawing]

FIG. 1 is an electric circuit diagram of a coffee boiler showing an embodiment of the present invention, and FIG. 2 is a sectional view of the same coffee boiler. 4...Motor, 5...Cutter (pulverizing member), 6...Current transformer (detection means)
, 8... Heater, 13... Control circuit,
15... Changeover switch (switching means), 18...
··tank. Name of agent: Patent attorney Toshi Nakao (11 or 1 person)
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Claims (2)

[Claims] (1) A motor that drives a crushing member that crushes coffee beans, a tank that stores water, a hot water supply means that supplies hot water to the crushed coffee grounds, and the end of crushing is detected by detecting the current flowing through the motor. and a switching means that switches energization from the motor to the hot water supply means based on the output of the detection means. (2) The coffee boiler according to claim 1, wherein the detection means for detecting the end of grinding by detecting the current flowing through the motor has a function of detecting an abnormal value and cutting off at least the power supply to the motor. .