JPH0679579B2 - Coffee kettle - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a coffee brewer for extracting coffee liquid by dropping boiling water into coffee powder.

Conventional technology Conventional coffee brewers of this type guide water from the bottom of a water tank into a heating pipe and heat the water with a heater,
Then, a drip type in which coffee is extracted by using steam generated by boiling water to raise water and dropping the hot water into coffee powder has been common.

Problems to be Solved by the Invention In such a conventional configuration, water is supplied to the same level as the water in the water tank in the heating pipe due to the siphon phenomenon when the water is stored in the water tank. , This cold water will be dripped into the coffee powder at the beginning of energizing the heater, and as a result, the condition of "dripping boiling hot water" that is the basis of coffee extraction cannot be satisfied. Therefore, there was a problem that delicious coffee could not be obtained.

The present invention solves such a problem, and provides a coffee brewer capable of increasing the temperature of hot water in contact with coffee powder from the initial stage and extracting a predetermined amount of coffee liquid. It is intended.

Means for Solving the Problems In order to solve the above problems, the present invention provides a hot water storage tank,
An auxiliary heater provided on a side part of the hot water storage tank, a closed container provided at a lower portion of the hot water storage tank and having a heater on the bottom surface, and a first water pipe connecting the hot water storage tank and the closed container in series. The first switching valve provided in the middle of the first water pipe, the second water pipe having one end connected to the closed container and the other end connected to the extractor, and the second water pipe provided in the middle of the second water pipe A second switching valve and a switching device that communicates any of the first and second switching valves are provided, and the second water pipe is pierced and supported by the auxiliary heater.

Action According to the above configuration, since the second water pipe is penetratingly supported by the auxiliary heater that heats the hot water storage tank, the cold water in the second water pipe is not discharged to the extractor side even in the initial stage of energization. Also, it is possible to prevent the second water pipe from being exposed to the atmosphere and radiating heat to lower the hot water temperature even during extraction.

Embodiments Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 5, reference numeral 11 denotes a main body, which has a base 13 on which a coffee cup 12 is placed. Reference numeral 14 is a hot water storage tank. This hot water storage tank 14 is provided with an auxiliary heater 15 on its side wall, and has a first thermostat 16 for detecting water temperature attached to the bottom surface thereof as shown in FIG.
Is placed. The auxiliary heater 15 is an integrally formed sheath heater 18 made of, for example, aluminum die casting, and has a through hole 19 in the center thereof. Reference numeral 20 denotes a closed container, which is connected to the hot water storage tank 14 by a first water pipe 21 and has a heater 22 and a second thermostat 23 for water temperature detection provided on the lower surface.

Reference numeral 24 is a cup-shaped extractor. The extractor 24 accommodates a disc-shaped filter member 25 and has an extraction port 26 at the center of the lower surface. 27 is an extractor lid and 28 is coffee grounds. 29 is a second water pipe that connects the closed container 20 and the extractor 24 in series, and one end of the second water pipe 29 faces the bottom surface of the closed container 20.
The other end penetrates the through hole 19 of the auxiliary heater 15 and further penetrates the side wall of the main body 11 to face the extractor 24.

Reference numeral 30 is a discharge port that opens upward, and 31 is a packing. Reference numeral 32 is a first switching valve provided in the middle of the first water pipe 20, 33 is a second switching valve provided in the middle of the second water pipe 29, and the first switching valve 32 has an inner surface. The sliding valve rod 34 opens and closes the flow path between the hot water storage tank 14 and the closed container 20,
Moreover, the second switching valve 33 opens and closes the flow path between the closed container 20 and the extractor 24 by the valve rod 35 sliding on the inner surface.

A switching device 37 has locking valves 40 and 41 slidably fitted in a substantially U-shaped frame 39 fixed to a support plate 38, as shown in FIG. Lock member 42
And the support plate 38 in the direction perpendicular to the lock member 42.
And the first shaft fitted and fitted with the frame 39
43 and a second shaft 44 are provided, and the first shaft
The projections 45 and 46 are provided on the 43 and the second shaft 44, and the first push button 47 and the second push button 48 are provided at the tips. 49 and 50 are fixed contacts connected to a power supply terminal (not shown). These fixed contacts 49 and 50 are the support plates 3
It is provided in 8. Reference numerals 51 and 52 are movable contacts connected to the auxiliary heater 15, and are adapted to interlock with the first and second shafts 43 and 44.

The tip end of the first shaft 43 in the above-mentioned switching device 37 faces the valve rod 34, and the tip end of the second shaft 44 is
It is arranged at a position facing the valve rod 35. In FIG. 5, 53 is a thermal fuse, 54 is a power lamp, and 55, 55 '.
Indicates a compression spring.

Next, the operation of the above configuration will be described. First, by pouring water into the hot water storage tank 14 and then pressing the first push button 47, the first switching valve 32 is opened via the valve rod 34 and the hot water storage tank 14 and the closed container 20 communicate with each other. The contacts 49, 51 are closed, and the auxiliary heater 15 is energized. At this time, the protrusion 45 of the first shaft 43 engages with the locking portion 40 of the lock member 42 and is locked.

The first thermostat 16 controls to energize the auxiliary heater 15 until the hot water in the hot water storage tank 14 is exhausted, that is, until it is in an idle state.

Next, the filter member 25 such as a paper filter and the coffee powder 28 of the capacity of the coffee cup 12 are set in the extractor 24, the extractor 24 is mounted on the side surface of the main body 11, and then the second push button 48 is pushed. Thereby, the second switching valve is opened, and a flow path from the closed container 20 to the extractor 24 is formed. At this time,
The protrusion 46 of the second shaft 44 is the locking portion 41 of the lock member 42.
Locked by. On the other hand, the first shaft 43 returns by the compression spring 55 to open the contacts 49, 51, but the contacts 50, 52
Therefore, as shown in FIG. 5, a series circuit of the auxiliary heater 15 and the heating heater 22 is formed, and the energization of these is controlled by the second thermostat 23. Then, the hot water in the closed container 20 is heated, the steam generated at this time is supplied to the extractor 24 side, until the hot water in the closed container 20 is exhausted, energization to the auxiliary heater 15 and the heater 22 is continued. It However, in this case, since the first switching valve 32 provided in the middle of the first water pipe 21 that connects the hot water storage tank 14 and the closed container 20 is closed, it is heated extremely rapidly and hot water is supplied to the extractor 24. It is something. Hot water storage tank 14
Almost the same effect can be obtained even while the temperature of the inner hot water is being raised. When the extraction is completed, the first push button 47 is pressed again to return to the initial state. Or which push button 4
It is also possible to reset 7,48 and stop the power supply to the heater.

Effects of the Invention According to the present invention, as is clear from the description of the above embodiments,
Since the hot water in the hot water storage tank is supplied to the closed container, it is possible to supply a fixed amount of water determined by the volume of the closed container to the extractor in an extremely short time, and the second water pipe leading to the extractor is an auxiliary device. Since it is constantly heated by the heater, hot water at the boiling temperature is guaranteed for the extractor. Further, the auxiliary heater is used for heating the hot water storage tank except when the extraction is performed, and it is possible to obtain an efficient heater with an extremely simple structure.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a coffee brewer showing an embodiment of the present invention, FIG. 2 is a side sectional view of the coffee brewer, and FIG. 3 is an exploded view of a part of the coffee brewer. 4 shown in perspective view
FIG. 5 is a sectional view of the switching device of the coffee brewer, and FIG. 5 is a circuit diagram of the coffee brewer. 14 …… hot water storage tank, 15 …… auxiliary heater, 20 …… closed container, 21 …… first water pipe, 22 …… heating heater, 29 …… second
Water pipe, 32 ... first switching valve, 33 ... second switching valve, 37 ...
... Switching device.

Claims (1)

[Claims] 1. A hot water storage tank, an auxiliary heater provided on a side portion of the hot water storage tank, a closed container provided at a lower portion of the hot water storage tank and having a heater on the bottom surface, the hot water storage tank and the closed container And a first water pipe that connects the
A first switching valve provided in the middle of the water pipe, a second water pipe having one end connected to the closed container and the other end connected to the extractor, and a second water pipe provided in the middle of the second water pipe. A coffee brewer having a switching valve and a switching device for communicating either of the first and second switching valves, and supporting the second water pipe through the auxiliary heater.