JPS62152417A - Electric 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 an electric coffee brewer, which is one of household electric appliances.

(Conventional technology) About traditional drip electric coffee brewers.

This will be explained with reference to FIGS. 3 and 4.

FIG. 3 is a cross-sectional view of a conventional electric coffee maker, in which a tank 3 containing water 2, with a check valve 1 attached to the bottom thereof, communicates with the above-mentioned check valve 1. A heater 6 is formed by integrally molding a heating pipe 4 and an electric heating element 5, a discharge port 8 is attached to the tip of a heating pipe 7 that communicates with the heating vibe 4, and a heater 6 is mounted on the heater 6. A glass container 9 for receiving brewed coffee and a filter 10
A filter 12 is placed on a glass container 9, into which coffee powder 11 is poured.

The operation of the electric coffee brewer configured in this way will be explained.

The water 2 in the tank 3 passes through the check valve 1 and is led to the heating vibrator 4 of the heater 6, where it is heated by the heating element 5 and becomes hot water, due to the steam pressure generated at that time and the action of the check valve 1 mentioned above. , is pushed up by the temperature rising pipe 7 and discharged from ``18,''
It is poured onto the coffee grounds 11 placed in the filter vessel 12.

(Problem to be Solved by the Invention) However, in this configuration, when the water 2 is poured into the tank 3, the heating pipe 7 is also filled with water with the same water head as the tank 3, so the heating element 5 is The hot water that is first poured into the coffee powder 11 from the discharge port 8 when it is heated by electricity is at the upper end of the heating pipe 7 and is not sufficiently heated at a low temperature of around 50°C to 60°C.

Since the optimum extraction temperature for coffee is 80°C to 95°C, such low-temperature water will significantly prevent the coffee powder 11 from swelling, making it impossible to completely extract the coffee components, and will also damage the coffee powder 11 as well as the filter. There was a problem in that the temperature of the entire coffee machine 12 was prevented from rising, and the coffee continued to be extracted at a low temperature, resulting in a low temperature of the coffee.

Figures 4 (a) and (b) are performance curve diagrams representing the above situation, where curve A indicates the temperature of the hot water being poured into the coffee powder 11 from the outlet 8, and curve outlet indicates the actual extraction temperature of the coffee. show.

The present invention solves the above-mentioned problems by setting the temperature of hot water poured over coffee grounds to the optimum temperature for extraction from the beginning, allowing the coffee grounds to sufficiently swell and the coffee components to be fully extracted, resulting in delicious coffee. The present invention provides an electric coffee brewer.

(Means for Solving the Problems) In order to solve the above problems, one aspect of the present invention is that the temperature is 80°C.
A switching valve with a heat-responsive part that operates when the temperature rises above ℃ is installed at the discharge port, and the temperature of the hot water supplied from the heating pipe is 80℃.
If the temperature does not reach 80°C, the coffee is returned to the tank, and when the temperature reaches 80°C, the switching valve is switched and the coffee is poured into the coffee powder in the filter.

(Function) With this configuration, the place where coffee powder is poured is within the optimal extraction temperature range from the beginning, and delicious coffee can be obtained.

(Example) Embodiments of the present invention will be described with reference to FIGS. 1 and 2.

FIG. 1 is a cross-sectional view of an electric coffee maker according to the present invention;
The electric coffee boiler has a tank 3 for holding water 2, which has a check valve 1 attached to its bottom on the base 13, and is connected to the check valve 1 housed inside the base 13. A heating pipe 4 and an electric heating element 5 are integrally molded by die-casting or the like, and a heater 6 is provided, and a hot water pipe 7 connected to the heating pipe 4 with an elbow 14 is provided. On top of the heater 6 is placed a glass container 9 in which coffee grounds 11 and a filter 10 are placed, and a filter 12 stacked thereon is covered with a lid 15 that sprays hot water onto the coffee grounds 11 when pouring hot water. . In addition, at the upper end of the temperature rising pipe 7,
Thermal response section 16 undergoes elongation and transformation when the humidity reaches approximately 80°C or higher.
And, due to this elongation metamorphosis, the L-shaped passage L slides up and down.
A switching valve 18 housing a valve body 17 provided with a valve body 7a is attached to the top of the switching valve 18, and a reflux pipe 19 whose other end opens to the tank 3 is connected to the side surface of the switching valve 18 via a connecting pipe 20. The drip pipes 21 are connected to each other.

The operation of the electric coffee brewer having such a configuration will be explained.

When water is poured into the tank 3 and electricity is applied to the heating element 5, the water in the heating pipe 4 is heated and pushed out by steam pressure, but because the check valve 1 is activated, it passes through the heating vibrator 7 and reaches the switching valve 18, but the water temperature does not change. Since the temperature does not reach 80°C, the liquid passes through the L-shaped passage 17a of the valve body 17 and returns to the tank 3 via the reflux pipe 19.

As shown in FIG. 2, when the hot water temperature reaches 80°C or more, the thermally responsive part 16 undergoes an elongation transformation, pushes the valve body 17 upward, and switches the hot water passage from the reflux pipe 19 to the drip pipe 21. It is sprinkled on the coffee powder 11 placed in the container 12.

In this way, only hot water at the optimum extraction temperature is poured onto the coffee grounds.

(Effects of the Invention) As explained in -1- above, according to the present invention, the hot water heated by the heater is refluxed to the tank until it reaches the optimum extraction temperature, and when it reaches the optimum extraction temperature, the thermally responsive part is heated. As a result, the switching valve is activated, and the coffee powder is poured into the filter.
The coffee is sufficiently swollen, and hot, delicious coffee with sufficient coffee components extracted can be obtained.

[Brief explanation of drawings]

Figures 1 and 2 are both cross-sectional views of the electric coffee translator according to the present invention. Figure 1 shows the state when the water temperature is less than 80°C, and Figure 2 shows the state when the water temperature is 80°C or higher. Each is shown below. FIG. 3 is a sectional view of a conventional electric coffee maker, and FIG. 4 is a diagram showing its performance characteristics. ■...Check valve, 2...Water, 3...Tank, 4...Heating pipe, 5...Heating element, 6.
... Heater, 7 ... Temperature rising pipe, 8 ... Discharge: J% port, 9 ... Glass container, 10 ...
Filter, 11...coffee powder, 12...filter,
13... Base 1, 14... Elbow, 15... Lid,
I6...Thermal response part, 17...Valve body, 17a...L
character-shaped passage, 18... switching valve, 19... reflux pipe,
20... Connection pipe, 21... WTF vibe. Patent applicant: Matsushita Electric Industrial Co., Ltd., ). Agent Kouji Hoshino・9°1・□
. knee? , Knee 1.9 "2" Knee: Knee 1. Figure 32 2... Ei 3... Tank 7...] Total leakage no flame.

Claims (1)

[Claims] Electric coffee consists of a tank that holds water, a heater that heats this water, a filter that puts coffee powder through a filter, and a heating pipe that leads the hot water that has been raised in temperature by the heater to the filter. In the boiler, a switching valve is attached to the upper end of the temperature rising pipe by connecting the reflux pipe that opens to the tank and the dripping pipe that opens to the filter. The valve body is operated by a heat-responsive part that transforms when the temperature reaches 80℃ or higher, and the temperature of the water reaches 80℃.
An electric coffee boiler characterized by switching the passage from the reflux pipe to the drip pipe when the temperature reaches 0°C or higher.