JPS6311122A - 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] Industrial applications The present invention relates to a coffee brewer.

BACKGROUND OF THE INVENTION Conventionally, there has been known a coffee boiler that integrates a grinding mechanism for grinding coffee beans with a drip mechanism, and automatically switches to drip operation after grinding the coffee beans.

That is, as shown in FIGS. 3 and 4, the coffee boiler includes a container 1 that integrates a coffee bean grinding chamber and a filtration chamber that extracts coffee liquid and separates the extracted liquid and residue. The container 1 is equipped with a cutter 3 that is rotated and moved by a motor 2, and a filter 4 at the bottom for separating the extract and the residue. and a timer 7 that automatically switches from energizing the motor 2 to energizing the heater 6 after the operation is completed, and a switch 8 that starts energizing the motor 2.

In the above configuration, when the timer 7 is set to the "mill" position and the switch 8 starts energizing, the coffee beans are ground by the cutter 3, and then the drip function is automatically performed. The water contained in the tank 9 is introduced into the water pipe 11 formed integrally with the heater 6 via the check valve 10, and the water is heated by the heater 6, causing the steam pressure generated to push the hot water upward. Hot water is then guided to a discharge pipe 11' located above the container 1, and hot water is poured into the container 1 from the discharge pipe 11' to extract the coffee liquid, and the coffee liquid is poured into the glass container 12. is accommodated.

Furthermore, when the timer 7 is set to the "drip" position and the switch 8 is operated, only the above-described drip function is performed.

FIG. 5 shows a specific circuit diagram of the same. Reference numeral 13 is a thermostat, and this thermostat 13 has its own operating temperature (hereinafter referred to as "adjusted temperature") and the temperature to which it itself is subjected (hereinafter referred to as "adjusted temperature"). 0N depending on the measurement temperature)
In other words, if the measured temperature is lower than the adjusted temperature, the heater 6 is turned on, and if it is higher, the heater 6 is turned off.

Note that the circuit diagram in the frame 3 is the circuit diagram during the drip operation.

Problems that the invention aims to solve Now, when making a large amount of coffee continuously, when the dripping process is finished, the extracted coffee liquid is transferred to another container, and the process is repeated again by adding fresh coffee beans and water. However, when we examine the actual usage in this case, we find that
When repeating this process, people often forget to fill the tank 9 with water.

In order to perform the drip operation in such a state, when the timer 7 is set to the "drip" position and the switch 8 is operated, the heater 6 is energized and heated, resulting in a so-called dry firing state. As a result, various parts within the main body become abnormally heated and their shapes become deformed, which is a major cause of failure. In other words, the temperature change of the water in the tank 9 during the drip operation is as shown in FIG. It is heated and the temperature gradually rises. When the hot water is "heated" and reaches boiling temperature, steam is generated, and the steam pressure pushes up the hot water and guides it to the discharge pipe 11', where coffee is extracted. While coffee continues to be extracted by supplying hot water from the discharge pipe 11', the temperature is maintained at approximately boiling temperature.

Then, when the supply of hot water from the discharge pipe 11' is almost completed and a state of dripping occurs, the temperature rises again due to heating from the heater 6, and when a predetermined temperature is reached, the heater is turned off. "Extraction" In other words, when the drip operation is finished, the temperature is higher than the boiling temperature, and if you forget to add water to the tank 9 and repeat the drip operation, the heater 6 will be energized and the temperature will be in a dry state. However, such dry firing not only wastes power, but also causes significant deterioration of each component, leading to failure.

The object of the present invention is to provide a coffee boiler that solves these problems.

Means for Solving the Problems In order to solve the above problems, the coffee boiler of the present invention has a tank provided in the main body and containing water, a water pipe for guiding the water in the tank, and a water pipe for directing the water. a heater for heating, a temperature sensing element for detecting the temperature near the heater, a heater energization control means for controlling energization of the heater, and a drip mechanism for supplying hot water to coffee grounds and extracting coffee liquid;
A drip start temperature setting means for setting the temperature at which the heater is energized, a time measuring means for measuring the time from the start of the drip, and a drip start capable for setting a limit value of the time measured by the time measuring means. The output signals of the time setting means, the temperature sensing element, the drip start temperature setting means, the 1-hour measurement means, and the drip start possible time setting means are input, and based on these information, the heater energization signal or the output signal is sent to the heater energization control means. The comparison means outputs a prohibition signal for energizing the heater.

Effect According to the above configuration, if the temperature detected by the temperature sensing element is higher than the temperature set by the drip start temperature setting means (this is taken as the predetermined temperature in FIG. 6) at the start of drip, the heater is Since no electricity is applied, it is possible to prevent dry firing during repeated use.

Furthermore, even if the temperature is high at the start of dripping, if the detected temperature falls within the time set by the drip startable time setting means, the heater is energized and the drip operation can be performed.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the block diagram shown in FIG.

In FIG. 1, parts that perform the same operations as in FIGS. 3 to 5 are given the same numbers, and here,
The explanation will be omitted.

In FIG. 1, numeral 14 is a temperature sensing element for detecting the temperature in the vicinity of the heater 6, and is installed at the position shown in FIG. 1
5 is a heater energization control means for controlling energization of the heater 6;
16 is an IJ knob start temperature setting means for setting the temperature at the start of drip; 17 is a time measuring means for measuring the time from the start of drip; 18 is a set value for the time measured by the time measuring means 17. In the drip start possible time setting means, these three outputs and the output of the temperature sensing element 14 are both input to the comparison means 19, and the comparison means 19 in parentheses makes a judgment and outputs a signal indicating whether or not to energize the heater 6. It is input to the heater energization control means 15. 2Q
is an alarm such as a buzzer or lamp. Note that the drip start temperature setting means 16 in the above embodiment. The operations of the drip start time setting means 182, the time measuring means 17, and the comparing means 19 are programmed by the microprocessor 21.

FIG. 2 shows an outline of the processing.

In the above configuration, when the timer 7 is set to the "drip" position and the drip operation is started, first the temperature sensing element 14
The temperature is detected, and it is checked whether the detected temperature is higher than the temperature preset by the drip start temperature setting means 16 (hereinafter referred to as "set temperature"). As a result, if the detected temperature is lower than the set temperature, energization to the heater 6 is started, but in the opposite case, the timer, which is the time measuring means 17, is operated. Then, the time set by the drip start possible time setting means 18 (hereinafter referred to as "set time")
), the temperature detection by the temperature sensing element 14 is repeated. If the detected temperature becomes lower than the set temperature within the set time, the drip operation will start, but if the detected temperature is still higher than the set temperature even after the set time is exceeded,
The alarm 2° is driven to notify the abnormality. That is, in this embodiment, if the temperature detected by the thermosensor 14 is equal to or higher than the set temperature at the start of dripping, the heater 6 is not energized, and even if the detected temperature is equal to or higher than the set temperature even after the set time has elapsed, the heater 6 is not energized. The configuration is such that an abnormality notification is performed. Conversely, if the detected temperature falls below the set temperature (waiting for cooling) within the set time, the heater 6 is energized.

Note that there are cases in which the start of the drip operation is set to the above-mentioned "drip" position and only the drip operation is performed, and cases in which the drip operation is performed after the mill operation is completed.

Further, in the above embodiment, a coffee boiler equipped with a mill mechanism has been described, but it goes without saying that the present invention can also be applied to a coffee boiler without a mill mechanism.

Effects of the Invention As described above, according to the present invention, if the temperature detected by the temperature sensing element is higher than the temperature set by the drip start temperature setting means at the time of starting drip, the heater is not energized. Therefore, it is possible to prevent dry firing during repeated use, thereby eliminating wasted power consumption due to dry heating, and also preventing failures due to abnormal heating of each component.

Furthermore, even if the temperature is high at the start of dripping, if the detected temperature falls within the time set by the drip start time setting means, the heater is energized and the dripping operation can be performed, providing excellent effects. It is something.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a coffee brewer showing an embodiment of the present invention, FIG. 2 is a flowchart for explaining the operation of the same coffee brewer, and FIG. 3 is a front view of a conventional coffee brewer. FIG. 4 is a longitudinal sectional view of the same coffee boiler, FIG. 5 is a circuit diagram of the same coffee boiler, and FIG. 6 is a temperature characteristic curve diagram during heating. 5...Body, 6...Heater, 9...
... Tank, 11 ... Water pipe, 14 ...
- Temperature sensing element, 15...Heater energization control means, 1
6...Drip start temperature setting means, 17...
. . . Time measurement means, 18 . . . Drip start possible time setting means, 19 . . . Comparison means, 2o.
...Alarm, 21...Microprocessor. Figure 1 G-Evening 2 Figure 3 Figure 4 IF 5-No holidays C---
Figure 5.

Claims (2)

[Claims] (1) A tank provided in the main body and containing water, a water pipe that guides the water in the tank, and a heater that heats the water;
A temperature sensing element that detects the temperature in the vicinity of the heater, a heater energization control means that controls energization of the heater, a drip mechanism that supplies hot water to coffee grounds and extracts coffee liquid, and energizes the heater. A drip start temperature setting means for setting the temperature, a time measuring means for measuring the time from the start of the drip, a drip start possible time setting means for setting a limit value of the time measured by the time measuring means, and the above-mentioned sensor. Each output signal of the temperature element, drip start temperature setting means, time measurement means, and drip start possible time setting means is input, and the elapsed time from the drip start is within the time preset in the drip start possible time setting means. , and if the detected temperature of the temperature sensing element is lower than the temperature preset in the drip start temperature setting means, a heater energization signal is output to the heater energization control means; otherwise, the heater energization is stopped. A coffee boiler comprising comparison means for outputting a prohibition signal. (2) The coffee boiler according to claim 1, wherein the alarm is activated when the heater is not energized even after the time set by the drip start time setting means. .