JPS62102720A - 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 used in general households.
-

2. Description of the Related Art In general, in this type of coffee brewer, when keeping the coffee beverage warm after brewing, the heat retention control is performed by placing a heater near the heating element, as shown in Japanese Utility Model Publication No. 58-30007, for example. This was done using a thermostat installed to prevent excessive temperature rises.

Problems to be Solved by the Invention However, in the conventional configuration described above, the thermostat is operated by heat conduction from the heating element, so the thermostat does not operate regardless of the amount of coffee dispensed. The heating element will be energized up to its off temperature, and as a result, for example, when dispensing a large amount of coffee,
When the thermos gradually cooled down and the quantity was small, it was boiled and tasted bad, making it impossible to drink.

The present invention solves the above-mentioned conventional problems, and aims to provide a coffee boiler that can maintain the optimum temperature according to the temperature of the brewed coffee and always produce delicious coffee beverages. purpose.

Means for Solving the Problems In order to solve the above-mentioned problems, the coffee boiler of the present invention includes a heating means for heating the water in the tank using a heating element, and a water supply for supplying hot water to the coffee powder using the heated lagoon. A heating means, a detection means for detecting the current or voltage of the heating element, a heating means for keeping the extracted coffee beverage warm, and a control for controlling the heating power of the heating element according to the time when the heating element is energized. The configuration includes means.

Effects According to the above configuration, the amount of finished coffee is estimated by measuring the time during which the heating element is energized, that is, the ejection time when the coffee powder is covered with water and the ejection is completed. Since the discharge time and the amount of coffee are proportional, it is possible to keep the coffee warm with the optimum heater power according to the amount of coffee discharged. In this way, the optimal temperature retention condition according to the amount of coffee extracted can be obtained automatically, so the user can always enjoy a delicious coffee beverage without the temperature of the coffee becoming cold or boiling. Obtainable.

Embodiments Hereinafter, embodiments of the present invention will be explained based on FIGS. 1 to 3.

FIG. 1 is a circuit diagram of a coffee boiler according to an embodiment of the present invention, in which 1 is a heater, 2 is a thermostat, 3 is a power switch, 4 is a temperature fuse, 5 is a current transformer,
6 is a control circuit, 6a is a clock circuit in the control circuit 6, 6b is an electronic control circuit in the control circuit 6, 7 is a silicon controlled rectifier (hereinafter referred to as "thyristor"), and 8 is a power source.

FIG. 2 is a sectional view of the same coffee brewer, where 9 is the main body of the coffee brewer, 10 is a water tank, and a check valve 11 is provided at the bottom of the water tank 10.

Reference numeral 12 denotes a heating pipe, one end of which is connected to the water tank 10 via the check valve 11 and the other end connected to the discharge pipe 14 via the water rising pipe 13. This discharge pipe 14 is located above the coffee basket 15 and opens downward. Coffee powder 16 is stored in the coffee basket 15 via a paper filter or the like. Below this coffee basket 15 is a glass container 17 in which the coffee basket 15 is placed and the extracted liquid is stored.
is provided. Reference numeral 18 denotes a heating body incorporating the heating pipe 12, and is equipped with the heater 1. This heating body 18
is provided with a thermostat 2 that shuts off the power to the heater 1 when the water in the heating pipe 12 runs out and the heating pipe 12 is empty.

The power switch 3 is attached to the coffee boiler main body 9, and the thermostat 2 and the temperature fuse 4 located near the heater 1 are wired in series, and the wire from the power source 8 to the heater 1 is connected in series. A current transformer 5 for detecting the current flowing through the heater 1 is wired to the heater 1, and these constitute a hot water supply circuit.

Next, the operation will be explained. When water is poured into the water tank 10 and the power switch 3 is turned on, the water passes through the heating pipe 12 via the check valve 11, and the water in the heating pipe 12 is heated by the heater 1 provided on the heating element 18. heated, boiling,
Due to the expansion, water passes through the rising pipe 13 and is discharged from the opening of the discharge pipe 14, dripping onto the coffee powder 16 in the coffee basket 15, and the extracted coffee liquid is collected in the glass container 17 and kept warm. In addition, water tank 1
When the water in the heater 1 runs out and the water in the heating pipe 12 runs out, the temperature of the heater 1 increases and the thermostat 2 shuts off the power supply 8. The time from the start of energization until the power supply 8 is cut off by the thermostat 2 is measured by a clock circuit 6a in the control circuit 6 based on the current detected by the current transformer 5. An electronic control circuit 6b in the control circuit 6 controls the heater power in proportion to the energization time measured by the clock circuit 6a by controlling the thyristor 7 on and off.

FIG. 3 shows another embodiment. In this embodiment, a heater 1 for heating water and an auxiliary heater 19 for keeping it warm are provided separately. When the water is completely discharged and the thermostat 2 is turned off, The auxiliary heater 19 is energized. This embodiment also provides the same effects as the first embodiment. At this time, the thermostat 2 may be set at a temperature lower than that of a thermostat 2 without the auxiliary heater 19.

In each of the above embodiments, the current is detected, but the same effect can be obtained by detecting the voltage of the heater 1 instead of the Ti flow.

Effects of the Invention As described above, according to the present invention, sufficient heating power is automatically obtained during the brewed coffee beverage, and delicious coffee can always be enjoyed. It also has excellent safety because it can prevent boiling and dry baking during heat retention.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of a coffee boiler according to one embodiment of the present invention, FIG. 2 is a sectional view of the same coffee boiler, and FIG. 3 is a circuit diagram of a coffee boiler according to another embodiment. . 1...Heater, 5...Current transformer, 6...
・Control circuit, 6a...Clock circuit, 6b...Electronic control circuit, 7...Silicon control rectifier element, 10...Water tank, 14...Discharge pipe, 16...Copy powder, 19... Auxiliary heater agent Morimoto I
Private 1 figure/---- and - game j-17L;) Tran Z 6-obtain 2 solid road 6a--day ↑8↑ nI ε1 ( 6b-'i3 $1 @circuit 2nd figure π-2 , Dunk M ・-rtsuhiha0iaa Figure 3

Claims (1)

[Claims] 1. A heating means for heating water in a tank with a heating element, a hot water supply means for supplying the heated hot water to coffee grounds, a detection means for detecting the current or voltage of the heating element, and a means for detecting the extracted coffee beverage. A coffee boiler comprising a heat retaining means for keeping the coffee warm, and a control means for controlling the heat retention power of the heat retaining means according to the time period during which the heating element is energized.