JPH0132977Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an improvement of a siphon-type coffee extractor.

[Technical background of the invention]

Conventionally, in a siphon-type coffee extractor, the upper opening of a flask-shaped lower container for storing water is passed through the pipe of the funnel-shaped upper container in an airtight manner, and the upper end of this pipe is used as a storage part. There is. When brewing coffee, fill the lower container with water, store coffee grounds in the container, and heat the lower surface of the lower container with an alcohol lamp or electric heater to bring the water in the lower container to a boil. This water is pumped into the storage section of the upper container, where coffee powder is soaked and coffee is extracted. Furthermore, when all of the water in the lower container is pumped up and the heat source is removed, the lower container is cooled down to a negative pressure and the coffee extract in the upper container descends into the lower container again and is contained therein.

[Problems with background technology]

However, in the above configuration, since a heat source such as an alcohol lamp is provided below the lower container, there is a problem that the heating efficiency of the heat source is poor.Furthermore, this heat source increases the height of the entire device, resulting in poor stability. Another problem is that the extracted coffee tends to cool down in the lower container.

[Purpose of invention]

This idea was made in view of the above circumstances.
The purpose is to provide a coffee extractor that can improve the heating efficiency of the heat source, reduce the size of the entire device, improve stability, and prevent the extracted coffee from cooling down.

[Summary of the idea]

The present invention is characterized in that a ceramic heater housed in the lower container is provided in the tube body of the funnel-shaped upper container that passes airtight through the opening of the lower container and reaches near the inner bottom of the lower container. The water or hot water stored in the lower container is directly heated by a ceramic heater.

[Example of idea]

An embodiment of the present invention will be described below with reference to the drawings.

Reference numeral 1 denotes a flask-shaped lower container, which has a cylindrical opening 2 formed in its upper part. The outer periphery of the cylindrical opening 2 is held and held by the handle 3a of the stand 3. Reference numeral 4 denotes a funnel-shaped upper container, which is shaped like a funnel and has a housing section 6 whose upper surface is open at the upper end of a pipe 5, which is a tubular body section.
A pipe 5 is airtightly attached to the cylindrical opening 2 of the lower container 1 via a packing 7 fitted to its upper end, and the lower end 5a of the pipe 5 is located near the inner bottom of the lower container 1. ing. 8 is a filter attached to the inner bottom of the storage section 6;
and the lower end 5a of the pipe 5, and is pressed against the inner bottom of the housing part 6 by a spring 9 installed between the lower end 5a of the pipe 5 and the lower end 5a of the pipe 5.

Now, 10 is a ceramic heater inserted around the outer circumference of the pipe 5, and this is a coil-shaped heater 11.
It is made by sintering a ceramic material into a cylindrical shape by embedding it inside, and a flange 12 is integrally extended at the lower end, and a heater 11 is also arranged within the flange 12. The heater 11 is formed of a ceramic heater 10 with coarse pitches at the top and dense pitches at the bottom, and the amount of heat generated is greater at the bottom than at the top. A cover member 13 surrounds the outer periphery of the ceramic heater 10 and is interposed between the packing 7 and the flange 12. A packing 14 is fitted into the lower end of the pipe 5, and the ceramic heater 11 is held between this and the packing 7. In addition, 15
is a cord line, and 16 is a switch.

Next, the operation of the above configuration will be explained. Water is poured into the lower container 1, coffee powder is stored in the storage part 6 of the upper container 4, the cord wire 15 is connected to a power source, and the switch 16 is turned on to energize the ceramic heater 10. Then, when the water in the lower container 1 is heated by the ceramic heater 10 and boils,
Since the pressure inside the lower container 1 increases, the hot water in the lower container 1 rises in the pipe 5 and is accommodated in the storage part 6, where it soaks the coffee grounds. Here, the inside of the container 6 is stirred to extract the coffee liquid. Next, when the water in the lower container 1 runs out, when the switch 16 is turned off and the ceramic heater 10 is cut off, the inside of the lower container 1 is cooled and the pressure gradually decreases, so that no water is extracted in the storage section 6. The coffee liquid passes through the filter 8, passes through the pipe 5 again, and is stored in the lower container 1. Therefore, by removing the upper container 4, coffee liquid can be supplied from the lower container 1.

According to the above configuration, the following effects can be obtained.

1. Since the ceramic heater 10 is provided on the pipe 5, the ceramic heater 10 is immersed in water and can directly heat the water, resulting in good heating efficiency.

2. The height can be lowered compared to the conventional one in which a heat source is provided below the lower container 1, the entire device can be downsized, and the stability can be improved.

3. In the ceramic heater 10, the pitch of the heater 11 is made coarse at the upper part and dense at the lower part so that the lower part has a larger calorific value than the upper part, and the flange part 12 is provided at the lower end, so that the inside of the lower container 1 is Even when the water boils and is pumped into the upper container 4 and the water level in the lower container 1 drops, the lower part or flange 12 of the ceramic heater 10, which generates a large amount of heat, is immersed in water, so the heating of the ceramic heater 10 is prevented. This can prevent a decrease in efficiency.

4. Since the ceramic heater 10 is provided surrounding the pipe 5, the coffee liquid flowing down the pipe 5 can be kept warm by preheating the ceramic heater 10, and the coffee liquid can be prevented from cooling down.

5. Since the ceramic heater 10 has the cover member 13 around its outer periphery, it is possible to prevent the risk of getting burned by touching the heater while handling it.

In the above configuration, the ceramic heater 10 is integrally fitted to the outer circumference of the pipe 5, but it may be integrally sintered to the outer circumference of the pipe 5. In this way, the pipe 5 and the ceramic heater 10
This prevents water from entering between the two and allows for easy cleaning after use. Therefore, the shape of the ceramic heater 10 is not limited to a cylindrical shape, and may be set arbitrarily, the flange 12 may be provided as necessary, and the arrangement pitch of the heater 11 may also be set arbitrarily. Alternatively, the ceramic itself may be used as a heat generating material, and various changes can be made without departing from the spirit of the invention.

[Effect of idea]

As is clear from the above description, the present invention provides a ceramic heater to be housed in the lower container in the pipe body of the upper container which is inserted into the lower container by airtightly penetrating the opening of the lower container. Because of this provision, heating efficiency can be improved, and the entire device can be made smaller, improving stability, and the extracted coffee is less likely to cool down.

[Brief explanation of the drawing]

The drawing is a longitudinal sectional view showing an embodiment of the present invention. In the figure, 1 is a lower container, 2 is a cylindrical opening, 4 is an upper container, 5 is a pipe (pipe body part), 6 is a storage part, 8
10 is a ceramic heater, 12 is a flange, and 13 is a cover member.

Claims (1)

[Claims for Utility Model Registration] 1. A lower container having an opening in the upper part, and a tube portion that passes through the opening of the lower container in an airtight manner and reaches near the inner bottom of the lower container. A funnel-shaped upper container having a housing portion with an open top surface formed at the upper end, a filter attached to the inner bottom of the upper container, and a ceramic heater provided in the tube body portion and housed in the lower container. A coffee extractor equipped with 2. The coffee brewer according to claim 1, wherein the ceramic heater is integrally sintered and fixed around the outer periphery of the tubular body. 3. The coffee brewer according to claim 1 or 2, wherein the ceramic heater has a higher calorific value at its lower part than at its upper part along its height. 4. The coffee brewer according to any one of claims 1 to 3, wherein the ceramic heater has a flange at its lower end. 5. The coffee brewer according to any one of claims 1 to 4, wherein the ceramic heater has a cover member surrounding the outer periphery of the ceramic heater.