JPH0698102B2 - 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.

2. Description of the Related Art A conventional coffee brewer of this type is disclosed, for example, in Japanese Utility Model Laid-Open No. 57-16.
As shown in Japanese Patent No. 1931, the structure was as shown in FIG. That is, it has a hot water storage tank 2 around which the heater 1 is wound, a pouring pipe 3 for dropping the hot water in the hot water storage tank 2 to the outside, and a supply lever for controlling the supply of the hot water, and pushes down the supply lever 4. The hot water supply pipe 3 is opened to supply hot water. Reference numeral 5 is a chamber for storing coffee powder 6 therein. 7
Is a bottle.

Problems to be Solved by the Invention With such a conventional configuration, the hot water storage temperature is not constant,
Particularly, when the amount of hot water stored is large, the temperature of the hot water becomes low, and when boiling hot water is required such as in a coffee brewer, the heat insulating means of the hot water storage tank 2 and high power are required. Generally, this type of coffee brewer always produces hot water in the hot water storage tank 2 and stores the hot water, and the amount of water constantly changes due to evaporation and water supply during this time. Therefore, when the required amount of hot water is supplied when necessary, the operation of the supply lever 4 must be depended on by the user, which is very inconvenient.

The present invention solves such a problem, and an object of the present invention is to provide a simple coffee brewer capable of extracting a coffee liquid by rapidly supplying a predetermined amount of boiling water at all times. It is a thing.

Means for Solving the Problems In order to solve the above problems, the present invention provides a closed container that is connected to a hot water storage tank via a pair of first water pipes, and a first container provided in the middle of the first water pipes. A switching valve and a second water pipe, one end of which is connected to the closed container and the other end of which is connected to the extractor, a second switching valve provided in the middle of the second water pipe, and the closed container. A heater and a switching device for communicating either of the first and second switching valves, and a check valve is provided on one of the pair of first water pipes to connect the hot water storage tank and the closed container. It is configured to circulate water.

Operation According to the above configuration, since the hot water storage tank and the airtight container are connected by the water pipe to constantly circulate the hot water, the hot water storage tank always keeps the boiling water, and it is the initial stage of circulation. However, since the temperature is further intensively heated by the heater in the closed container, the hot water temperature does not decrease, and a fixed amount corresponding to the volume of the closed container can be supplied to the extractor.

Embodiment An embodiment 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, and a mounting step portion 16 of the storage 15 is formed on the upper edge thereof.
17 is a closed container provided under the hot water storage tank 14,
The closed container 17 is formed by the hot water storage tank 14 and the pair of first water pipes 1.
8, 19 are connected in series, and the first water pipe 19 is equipped with a check valve.
20 is installed. Further, on the lower surface of the closed container 17,
A heater 21 and a thermostat 22 for detecting water temperature are provided.

Reference numeral 23 denotes a cup-shaped extractor. The extractor 23 accommodates a disk-shaped filter member 24, has an extraction port 25 at the center of the lower surface, and further has an extractor storage 26 at the inner periphery of the upper edge. The screw portion 27 is formed. 28 indicates coffee grounds. Reference numeral 29 is a second water pipe that connects the closed container 17 and the extractor 23 in series. One end of the second water pipe 29 faces the bottom surface of the closed container 17 and the other end penetrates the side wall of the main body 11. It faces the inside of the extractor 23. Reference numeral 30 is a discharge port that opens upward. 31 is a packing. 32 and 32 'are first switching valves provided in the middle of the pair of first water pipes 18 and 19, and 33 is a second switching valve provided in the middle of the second water pipe 29. First switching valve 32,3
The second switching valve 2'opens and closes the flow path between the hot water storage tank 14 and the closed container 17 by means of the valve rods 34, 34 'which slide on the inner surface.
Reference numeral 33 denotes a valve rod 35 that slides on the inner surface to open and close the flow path between the closed container 17 and the extractor 23. Where the valve rod
The tips of 24 and 24 'are connected by a connecting plate 36.

37 is a switching device, and this switching device 37 has locking members 40 and 41 slidably fitted in a substantially frame 39 fixed to a support plate 38, as shown in FIG. 42,
The first shaft 43 has a first shaft 43 and a second shaft 44 that are mounted by inserting the support plate 38 and the frame 39 in a direction perpendicular to the lock member 42.
The second shaft 44 is provided with protrusions 45 and 46, and the first push button 47 and the second push button are provided at the tip.
48 are provided. 49 and 50 are fixed contacts connected to a power supply terminal (not shown). The fixed contacts 49 and 50 are provided on the support plate 38. 51 and 52 are the heaters 21
The movable side contact is connected to 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 connecting plate 36, and the tip end of the shaft 44 of the second stage 2 faces the valve rod 35. Fifth
In the figure, 53 is a thermal fuse, 54 is a lamp for energizing the heater 21, and 55 and 55 'are compression springs.

Next, the operation of the above configuration will be described. First, the hot water tank 14 is filled with water, and then the first push button 47 is pressed to open the pair of switching valves 32, 32 'through the connecting plate 36, so that the hot water tank 14 and the closed container 17 communicate with each other. At the same time, the contacts 49, 51 are closed and the heater 21 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. When the water flowing into the closed container 17 is heated, the steam generated at this time pushes up the water in the first water pipe 18. As a result, the water in the hot water storage tank 14 flows into the closed container 17 from the other first water pipe 19 via the check valve 20. Hot water storage tank
Hot water circulates between 14 and the closed container 17. This circulation is
This is done until the hot water in the hot water storage tank 14 and the closed container 17 boils, and the thermostat 22 operates to cut off the heater circuit.

Next, a filter member such as a paper filter and the coffee powder 28 of the capacity of the coffee cup 12 are set in the extractor 23, mounted on the side surface of the main body 11, and then the second push button 48 is pressed, thereby The switching valve 33 is opened to form a flow path from the closed container 17 to the extractor 23. At this time, the protrusion 46 of the second shaft 44 is locked by the locking portion 41 of the lock member 42. On the other hand, the first shaft 43 is restored by the compression spring 55 to open the contacts 49 and 51, but one of the contacts 50 and 52 is closed, so that the power is supplied to the heater 21. Therefore, if the temperature of the hot water in the closed container 17 is lowered, the heater 21 is energized until it is further heated and reaches the boiling point, and the thermostat 22 operates. However, in this case, since the circulation flow path with the hot water storage tank 14 is closed,
The hot water in the closed container 17 is extremely rapidly heated and supplied to the extractor 23. When the extraction is completed, the first push button 47 is pressed again to return to the initial state. Alternatively, both push buttons 47, 48 can be returned to stop the energization of the heater 21.

In the embodiment of the present invention, the size of the closed container 17 is set with reference to a general coffee cup, but the size is not limited to this. Set a volume of 17. The thermostat 22 may be operated when the circulation passage is closed and the hot water in the closed container 17 reaches the boiling point, and during circulation, the hot water in the hot water storage tank 14 may be operated at the boiling point or lower. .

EFFECTS OF THE INVENTION As is clear from the description of the above embodiments, according to the present invention, a hot water circulation path is formed between a hot water storage tank and a closed container to generate high-temperature hot water, and a predetermined amount of hot water and hot water in the closed container. Since the temperature is secured, it is possible to obtain a stable and constant amount of coffee liquid at a high temperature very quickly, and since it can be obtained with a simple structure, it can be provided at a low cost. It is possible.

[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, FIG. 5 is a circuit diagram of the coffee brewer, and FIG. 6 is a side view of a conventional coffee brewer. 14 …… hot water storage tank, 17 …… closed container, 18, 19 …… first water pipe, 20 …… check valve, 21 …… heater, 23 …… extractor, 29
...... Second water pipe, 32,32 '...... First switching valve, 33 ...... Second
Switching valve, 37 ... Switching device.

Claims (1)

[Claims] 1. A closed container connected to a hot water storage tank via a pair of first water pipes, a first switching valve provided in the middle of the first water pipe, and one end connected to the closed container, A second water pipe having the other end connected to the extractor, a second switching valve provided in the middle of the second water pipe, a heater provided in the closed container, and the first and second switching valves. A coffee brewing machine having a switching device for communicating with each other and having a check valve disposed in one of the pair of first water pipes so as to circulate water in the hot water storage tank and the closed container.