JPH0332611A - Coffee extractor - Google Patents

Abstract

PURPOSE:To improve the wettability of dripping water and coffee powder and to exhaustively extract a coffee element by detecting the temperature of coffee powder contained in a filter chamber, and bringing the dripping water to heating control in accordance with its information. CONSTITUTION:On the inside of a filter chamber 7, a temperature detecting means 13 such as a thermistor, a thermometer, etc., is provided, and on a water feeding passage 3, a suitable heating body 14 for heating water is provided, and this heating body 14 adjusts an input value and an energizing cycle, etc., by a heating body control means 15. Information from the temperature detecting means 13 is processed by a temperature detecting circuit 16, sent to a heating body control means 15 and controls the heating body 14. When coffee powder 6 of a low temperature is put into the filter chamber 7, the information from the temperature detecting means 13 works so as to up an input value of the heating body 14 or to extend the energizing cycle, and when a temperature of coffee powder is high, said information works on its reverse direction, and since a temperature of dripping water is heated to a temperature at which wettability to the coffee powder 6 becomes satisfactory enough, the coffee element is extracted exhaustively.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a cold brew coffee extractor for extracting coffee using cold water or the like.

BACKGROUND OF THE INVENTION Conventionally, this type of cold brew coffee extractor has generally been shown, for example, in FIG. 4, and its configuration is as follows.

That is, water is poured into the water container 21, and the regulating valve 22 is adjusted to drip the water little by little into the coffee powder 24 housed in the filtration chamber 23. The dropped water passes through the coffee grounds 24 over a long period of time, extracts coffee components, and then becomes coffee liquid and drops into the coffee container 25.

Problems to be Solved by the Invention However, this configuration has the following problems.

First, the important points in this kind of coffee brewer are:
The two points are whether or not the dropped water can sufficiently and evenly penetrate into the coffee grounds, and whether or not there is good wettability between the dropped water and the coffee grounds.

Experiments have revealed that the wettability of coffee powder with water is greatly influenced by factors such as ■ temperature of dripping water, ■ temperature of coffee grounds, and ■ flow rate of flowing water.

For example, as the dripping water becomes colder, the surface tension of the water increases, and the water itself becomes inert, resulting in extremely poor wettability.Also, coffee powder stored at a low temperature in a refrigerator, etc. When using coffee powder, the oil needles contained in the coffee powder become inactive, resulting in poor wettability.

In this way, if the wettability between the dripping water and the coffee powder is poor, the dripping water will not be able to fully penetrate into the coffee powder, making it impossible to extract the coffee components, and making it impossible to fulfill its role as a coffee extractor. I end up.

Furthermore, if the amount of dripping water is too large for the water to permeate into the coffee powder, the amount of water that cannot permeate will overflow from the filtration chamber.

Conventional cold brew coffee extractors do not take into account how to improve the wettability of dripping water and coffee grounds, or how to adjust the amount of dripping water, and rely on the intuition and experience of the user. It was large and extremely difficult to use.

The present invention solves these conventional problems by automatically heating dripping water to the temperature of the lowest drop when the temperature of coffee powder stored in the filtration chamber is low.

Means for Solving the Problems and In order to achieve the above object, the present invention provides a water container containing water, a flow control valve for controlling the dripping flow rate of water in the water container, and a flow rate control valve for controlling the dripping flow rate of the water in the water container. A heating element for heating water, a filtration chamber for receiving the dripped water and accommodating coffee powder, and a temperature detection means for detecting the temperature of the coffee powder stored in the filtration chamber, The heating element has heating element control means for controlling the heating element in accordance with information.

For production The effect of this technical means is as follows.

In other words, when the temperature of the coffee powder stored in the filtration chamber is low, if the heating element automatically heats the dripping water to the optimum temperature, the wettability between the dripping water and the coffee grounds will be improved, and the dripping water will be sufficient. It can penetrate into coffee powder and extract all the coffee components.

EXAMPLE Hereinafter, an example of the present invention will be described based on the accompanying drawings.

In FIG. 1, a water container 2 provided above the extractor main body 1
The water inside is sent from the water supply passage 3 at the bottom to a flow rate control valve 4 that controls the dripping flow rate of water, and the water is throttled down to a minute amount and dripped through the discharge port 6, and is then passed through the filtration chamber that accommodates the coffee powder 6. Sent to 7.

The water dropped into the coffee powder 6 passes through the coffee powder 6 over time, extracts coffee components, becomes coffee liquid, drops into a discharge port 8, and is stored in a coffee container 9.

The flow rate control valve 4 has a shaft shape with a valve hole 1o formed therein, and the valve hole 1o is arranged so as to intersect with the water supply passage 3, as shown in FIG. conversely, as d increases, the plug flow rate decreases (Fig. 2b)
).

Reference numeral 11 denotes a seal for watertightly fitting the flow rate control valve 4 and the water passageway 3, and 12 is a knob provided on the flow rate control valve 4, which is used when manually controlling the dripping flow rate.

The inside of the filtration chamber 7 is equipped with temperature detection means 13 such as a thermistor or thermometer, and the water supply passage 3 is equipped with a suitable heating element 14 for heating the water. The heating element 14 can adjust input values, energization cycles, etc. by the heating element control means 16.

FIG. 3 is a circuit block diagram showing the relationship between the temperature detection means 13 and the heating element 14. Information from the temperature detection means 13 is processed by the temperature detection circuit 16 and sent to the heating element control means 15. The heating element 14 is controlled by the heating element 14 .

In the above configuration, when low-temperature coffee powder 6 is introduced into the filtration chamber T, the information from the temperature detection means 13 acts to increase the input value of the heating element 14 or lengthen the energization cycle. When the temperature is high, it acts in the opposite direction.

By doing this, the temperature of the dripping water is heated according to the temperature of the coffee powder 6 stored in the filtration chamber 7 to a temperature at which wettability with the coffee powder 6 is sufficiently improved, so that all coffee components are extracted. be able to.

Effects of the Invention As described above, the present invention detects the temperature of coffee powder and adjusts the power of the water heating element according to the temperature, so that sufficient wettability between dripping water and coffee powder can be ensured. , it is possible to extract all coffee components.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view of essential parts of a coffee extractor showing an embodiment of the present invention, Fig. 2 a and b are cross-sectional views taken along line A-A in Fig. 1 in different states, and Fig. 3 4 is a block circuit diagram of the same coffee extractor, and FIG. 4 is a sectional view showing a conventional example. 2...Water container, 4...Flow rate control valve, 7
......Filtering chamber, 13...Temperature detection means,
14... Heating body, 16... Heating body control means.

Claims (1)

[Claims] A water container that stores water, a flow control valve that controls the dripping flow rate of water in the water container, a heating element that heats the dripping water from the flow control valve, and a heating element that receives the dripped water and stores coffee powder. and a heating element control means for controlling the heating element in response to information from the temperature sensing means. A coffee extractor.