JP3155531B2 - coffee maker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coffee maker capable of producing espresso coffee using a triangular paper filter.

[0002]

2. Description of the Related Art Conventionally, an apparatus for extracting espresso coffee has a special and complicated structure dedicated to home use because it is necessary to extract coffee by applying a high vapor pressure to coffee powder. There is no known coffee maker that makes espresso coffee using the triangular paper filter that is used to make regular coffee.

[0003] Japanese Patent Application Laid-Open No. H11-120434 discloses a coffee extraction device that can produce either espresso coffee or regular coffee by switching the pressure of the coffee extraction unit. This conventional coffee extraction device is for a vending machine, and uses pressurized air to extract both regular coffee and espresso coffee because it is necessary to extract it in a short time. In this case, steam is blown to the coffee powder before extraction.

[0004] However, the conventional dual-purpose coffee extraction apparatus is a large-scale apparatus because of the extraction method using pressurized air as described above, and cannot be applied to a home coffee maker.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional technical problem, and can extract espresso coffee by using a triangular paper filter. An object is to provide a coffee maker that can be downsized.

[0006]

According to a first aspect of the present invention, there is provided a coffee maker having a sealable water tank formed in an apparatus main body, and a water tank in the apparatus main body for heating and boiling water in the water tank. A built-in heater, a dripper of a triangular paper filter type detachably mounted on a dripper mounting portion of the apparatus main body, a bottle for storing coffee extract extracted by the dripper, and the water in the apparatus main body. The pump includes a pumping pipe provided in a portion extending from near the bottom of the tank to the inside of the dripper, and sealing means for sealing the inside of the dripper to withstand an internal pressure of 1 to 3 atm.

In the coffee maker according to the first aspect of the present invention,
A required amount of water is put in a water tank and sealed, and a dripper of a triangular paper filter type containing coffee powder is mounted on a dripper mounting portion of the apparatus main body, and the dripper is withstands an internal pressure of 1 to 3 atm by a sealing means. Keep tightly closed. Then, the water in the water tank is heated and boiled by the heater.

As a result, when the water in the water tank boils,
Since the water tank is closed, the vapor pressure inside it rises and pressurizes the liquid surface of the hot water, and the hot water is jetted into the dripper through the pumping pipe to extract the coffee liquid, and the coffee extract is put in the bottle. It can be stored by dropping. At this time, since the inside of the dripper is sealed to withstand the internal pressure of 1 to 3 atm by the sealing means, the extraction pressure of the coffee liquid increases as the vapor pressure increases, and espresso coffee is extracted through a triangular paper filter. Can be.

According to a second aspect of the present invention, in the coffee maker of the first aspect, there is provided a pressure adjusting means for switching the inside of the dripper to a closed state capable of withstanding an internal pressure of 1 to 3 atm or an open state to the atmosphere.

[0010] In the coffee maker according to the second aspect of the present invention,
Espresso coffee is extracted at a high vapor pressure by extracting coffee with the inside of the dripper sealed by the pressure adjusting means, and coffee is extracted by opening the inside of the dripper to the atmosphere by the pressure adjusting means, and regular paper filter is used. Extract coffee (drip extraction)
And can make both espresso coffee and regular coffee using the same one device.

According to a third aspect of the present invention, in the coffee maker of the first or second aspect, the dripper has a funnel shape in which the inside shape of the lower half corresponds to the shape of the triangular paper filter, and the upper half thereof. Has a cylindrical shape, and the inner diameter of the upper half is made larger than the inner diameter of the upper end of the lower half, thereby providing a water reservoir step between the two.

When one coffee maker extracts and switches between espresso coffee and regular coffee, the amount of water used for espresso coffee is small,
Since the amount of water used for regular coffee is large, the amount of water dropped from the water tank on the dripper also differs greatly. The amount of water used by a large number of people differs greatly from that of a small group.

Therefore, in the coffee maker according to the third aspect of the invention, the dripper has a funnel shape in which the lower half has an inner shape corresponding to the shape of a triangular paper filter, the upper half has a cylindrical shape, and the upper half has a cylindrical shape. By making the inside diameter larger than the inside diameter of the upper end of the lower half and forming a water reservoir between them, when using a small amount of water, such as when extracting espresso coffee, most of the dripper When hot water for extraction is stored only in the lower half, and when extracting with a large amount of water, such as when extracting regular coffee, hot water for extraction can also be stored in the upper half of the dripper. Even if there is a large difference in the amount of water, the same dripper can be used.

According to a fourth aspect of the present invention, there is provided a coffee maker, comprising: a sealable water tank formed in the apparatus main body; a heater incorporated in the apparatus main body for boiling water in the water tank; A circulation pipe that draws water to the heater from near the bottom of the water tank and discharges hot water heated by the heater into the upper air in the water tank, and can be attached to and detached from the dripper mounting part of the device main body. A dripper of a triangular paper filter type, a bottle for storing the coffee extract extracted by the dripper, and a pump provided in a portion extending from near the bottom of the water tank in the apparatus body to the inside of the dripper. A pipe, a sealing means for sealing the inside of the dripper to withstand an internal pressure of 1 to 3 atm, and an upper part of the water tank of the pumping pipe. In part it is out, it is obtained by forming a pressure adjusting hole at a position higher than the outlet of the hot water in the circulation pipe.

[0015] In the coffee maker according to the fourth aspect of the present invention,
After injecting the required amount of water into the water tank, it is sealed, heated and boiled by a heater, and the steam pressure in the water tank is increased to send out the hot water in the water tank into the dripper by a pumping pipe. By providing a pressure adjusting hole at the position of the gas phase above the water tank, the vapor pressure of the gas phase only becomes sufficiently high, that is, the liquid level of the hot water is pushed down by the vapor pressure only when it is sufficiently boiled. In addition, hot water is extruded from the pumping pipe into the dripper, and low-temperature water with insufficient heating is not extruded to the dripper side. Moreover, by providing the pressure adjusting hole at a position higher than the discharge port of the circulation pipe in the water tank, even if the user mistakenly injects excessive water into the water tank by a certain amount, the discharge pipe of the circulation pipe can be used. Since the outlet is visible to the user, the water is not injected until the water level is higher than the height, and the coffee can always be extracted by sufficiently boiling hot water.

According to a fifth aspect of the present invention, in the coffee maker of the first to fourth aspects, a handle is provided on the dripper, and after extracting using high-temperature water, the paper filter and the coffee powder are discarded. It is easy to handle when removing the dripper from the device body and carrying it.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. 1 and 2 show the configuration of a coffee maker according to a first embodiment of the present invention. In the coffee maker of this embodiment, a water tank 2 is provided on one of the left and right sides of the apparatus main body 1, and a coffee mill 3 is provided on the other of the left and right sides.
The water tank 2 and the coffee mill 3 in the apparatus main body 1
The dripper mounting part 4 is provided so as to protrude forward from the upper part of the intermediate position of the dripper, and a bottle supporting part 5 is provided so as to face below the dripper mounting part 4. Attach the edge,
The bottle support 5 has a structure in which a bottle 7 for storing the coffee liquid extracted by the dripper 6 is placed. 3a is a mill switch, and 8 is a base for supporting the entire apparatus body 1.

The internal structure of the coffee maker will be described with reference to FIG. The water tank 2 is provided with a lid 11. By screwing the lid 11, the water tank 2 can be maintained in an airtight state up to a predetermined pressure (here, the internal pressure is about 3 atm). A heat insulating plate 12 for receiving the bottle 7 is mounted above the bottle supporting portion 5 of the apparatus main body 1, and a horseshoe-shaped heater 13 is arranged on the back side of the heat insulating plate 12. 12
It is supported so that it can be hung from it. The heat of the heater 13 transfers heat to the heat insulating plate 12, and the heat insulating plate 12
The bottom of the bottle 7 placed above is heated to keep the coffee liquid warm.

A circulation pipe 15 is arranged below the horseshoe-shaped heater 13 so as to be attached to the heater. One end of the circulation pipe 15 is connected to a water outlet pipe 16 communicating with the bottom of the water tank 2, and the other end of the circulation pipe 15 is
Discharge port 1 at a position higher than the maximum water level of water tank 2
7a is connected to a discharge pipe 17 having a length where the discharge pipe 7a is located. A check valve 18 is provided at a portion of the water outlet pipe 16 connected to the water tank 2, and the direction in which water is led out from the water tank 2 to the water outlet pipe 16 is set to the forward direction, and the water is supplied in the opposite direction. Flow is blocked. Thereby, when water is supplied to the water tank 2 and then the heater 13 is energized, the water 19 in the water tank 2 is led out to the circulation pipe 15 through the water outlet pipe 16 and is heated by the heater 13.
The heated water is returned from the circulation pipe 15 to the water tank 2 through the discharge pipe 17, and circulates in a path of being discharged from the discharge port 17a at a position higher than the surface of the water in the water tank 2, while being boiled and heated. You.

As shown in FIG. 3, an annular rib 21 serving also as a splash-scattering cover is formed on the lower surface of the dripper mounting portion 4 of the apparatus main body 1. Tapered portions 22 are provided at a plurality of locations (here, three locations separated by 120 degrees) on the inner peripheral surface of the rib 21 at equal rotation angles so as to rotate clockwise as viewed from the user. . A flexible sealing material 23 is attached to the entire inside of the rib 21 on the lower surface of the dripper mounting portion 4. On the side surface at the front end of the dripper mounting portion 4, a "set" indicating a set position of the dripper 6 described later, a rotational position of the dripper 6 for extracting regular coffee, and a rotational position of the dripper 6 for extracting espresso coffee, respectively. , "Regular" and "Espresso" 24A, 24B and 24C are provided (see FIG. 1).

On the other hand, as shown in FIG. 3 and FIG. 4, the dripper 6 has a handle 25 and has an internal shape to which a triangular paper filter 26 can be attached. That is, the lower half 6b of the dripper 6 has at least a funnel-like internal shape, and the upper half 6c has a cylindrical shape having an inner diameter larger than the major diameter of the lower half 6b. The entire dripper 6 is formed by integrally molding the half part 6c. Therefore, the inside of the connection part between the lower half part 6b and the upper half part 6c becomes a flat stepped part 6d, and this part serves as a water reservoir. An extraction port 6a is formed at the bottom of the lower half 6b. The lower half 6b may have a funnel shape so that its inner shape can stably support the triangular paper filter 26, and the outer shape is not particularly limited, and may be the illustrated funnel shape. May be cylindrical.

The upper edge 27 of the opening of the dripper 6 is provided with the tapered portion 22 of the dripper mounting portion 4 of the apparatus main body 1 described above.
The locking projection 28 is provided in the same arrangement as that described above. Therefore, the dripper 4 is pressed from below into the annular rib 21 in a state where the locking projection 28 is aligned with the cut between the tapered portions 22 (the state in which the handle 25 is aligned with the position of the "set" notation 24A). By rotating the locking protruding piece 28 to the upper side of the tapered portion 22 by rotating to the right and locking it on the tapered portion 22, the entire dripper 6 is mounted on the dripper mounting portion 4, and the dripper 6 is dropped even if the hand is released. (In this state, the handle 25 is at the position of the “regular” notation 24B. See FIG. 2B.) When making regular coffee, heating is performed by the heater in this state, but when the grip 25 is further rotated to the right with the handle 25, the locking projection 28 further rises up the tapered portion 22, and the opening upper edge 26 The whole is in close contact with the sealing material 23, and the dripper 6 is in a sealed state (see FIG. 2A. In this state, the grip 25 is in this state).
Is the position of the “espresso” notation 24C). When making espresso coffee, the dripper 6 is rotated to this state and heated by the heater.

As shown in FIG. 2, the pumping pipe 31 is arranged so as to extend from the water tank 2 to the dripper mounting section 4.
The water inlet 31a at one end is located near the bottom in the water tank 2, and the jet port 31b at the other end is located at the center of the lower surface of the dripper mounting portion 4 so as to jet hot water into the dripper 6. In a portion of the pumping pipe 31 passing through the water tank 2, a discharge port 17 of the discharge pipe 17 is provided.
A pressure adjustment hole 32 is formed at a position higher than a.

The pressure adjusting hole 32 allows the pumping pipe 3
Before the hot water starts to pass through the inside 1, the gas phase portion in the water tank 2 and the dripper 6 side are in communication with each other, and the air pressures match. Therefore, the vapor pressure of the gas phase portion increases until the water in the water tank 2 is heated and boiled, and during that time, the air pressure in the water tank 2 and the dripper 6 increases almost uniformly, The dripper 6 does not have a negative pressure with respect to the inside of the water tank 2. As a result, the lukewarm water before being sufficiently heated is supplied from the water tank 2 to the dripper 6 by the pumping pipe 31.
Water is sufficiently boiled, and the vapor pressure in the water tank 2 is about 2 to 3 atm.
Only around 3 ℃)
You will be able to extract delicious coffee.

[0025] Even if the steam pressure is about 1.03 to 1.1 atm, coffee can be sufficiently extracted.

The reason why the pressure adjusting hole 32 is provided at a position higher than the discharge port 17a of the discharge pipe 17 is as follows.
The maximum water level is set lower than the position of the discharge port 17a. A proper water injection procedure is that the user first uses the bottle 7 to fill the required amount of water with reference to the scale written thereon, and then water is injected from the bottle 7 into the water tank 2. However, it is also conceivable that the user takes off the lid 11 of the water tank 2 and injects water in the unit of an amount. In such a case, since the inside of the water tank 2 is dark, the water level is not known, and it is expected that water is injected using the position of the discharge port 17a seen from the outside as a guide. Therefore, this discharge port 17
The height of a is set to the maximum allowable water level, and even if water is injected to this position, consideration is given so that the pressure adjusting hole 32 can exert the above-described function.

A switch (not shown) for energizing / stopping the heater 13 is provided at a suitable position of the apparatus main body 1.

Next, the operation of the coffee maker having the above configuration will be described.

<Espresso Coffee Extraction> The espresso method is a method in which water heated by pressure such as steam is penetrated into coffee powder to forcibly extract a coffee liquid.

Referring to FIG. 5, the operation and operation required for extracting espresso coffee will be described. Put the appropriate triangular paper filter 26 in the dripper 6, put the required amount of coffee powder 41, place the handle 25 on the notation "set" 24A provided on the front of the dripper mounting part 4, and put the dripper 6 from below. It is fitted into the rib 21 of the mounting part 4 and rotated to the right, and is largely rotated to the right until the handle 25 reaches the position of the notation "espresso" 24C.

Thus, the upper edge 2 of the opening of the dripper 6
7 are pushed up by sliding on the respective tapered portions 22 provided in the ribs 21 on the lower surface of the dripper mounting portion 4, and the entire upper surface of the opening upper edge portion 27 is in close contact with the sealant 23. Then, the dripper 6 is fixed in a sealed state. On the other hand, before and after the attachment of the dripper 6, the lid 11 is removed, a required amount of water 19 is poured into the water tank 2, and the lid 11 is securely closed. Thus, the inside of the water tank 2 is also closed. At this time, the gas phase portion of the water tank 2 and the inside of the dripper 6 are communicated with each other by the pumping pipe 31 and the pressure adjusting hole 32 provided therein, and have the same pressure.

In this manner, the dripper 6 is mounted on the dripper mounting section 4 and the bottle 7 is placed on the bottle supporting section 5,
With the water 19 put in the water tank 2 and the lid 11 closed, a switch (not shown) is turned on to start energizing the heater 13.

When the heater 13 generates heat, the water 19 in the water tank 2 is heated and boiled while circulating through the outlet pipe 16, the circulation pipe 15, the discharge pipe 17, and the water tank 2. When the water 19 continues to boil, the vapor pressure in the gas phase in the water tank 2 increases, and a force to push down the liquid level WL acts, whereby the hot water 19 in the water tank 2 is removed from the pumping pipe 31. , And is pushed upward to squirt into the dripper 6.

When a certain amount of hot water accumulates in the dripper 6, the portion of the water tank 2 and the inside of the dripper 6 are substantially in a sealed state (however, since the dripper 6 communicates with the atmosphere through the extraction port 6a, it is not completely airtight. However, a high steam pressure (here, 1.03 to 1.1 atm) is applied to the inside of the dripper 6 due to the presence of the coffee powder 41, and the hot water generates the steam. Coffee powder 4 by pressure
1 and is extracted into the bottle 7 from the extraction port 6a.

The vapor pressure in the dripper is controlled by the extraction port 6a.
By setting the size of the pressure adjusting hole 32 to a predetermined value, the pressure is set to 1.03 to 1.1 atm.

Thus, the hot water 19 is forcibly passed through the coffee powder 41 in the dripper 6 with a high vapor pressure to extract the coffee liquid, so that espresso coffee is produced.

<Regular Coffee Extraction> With reference to FIG. 6, operations and operations necessary for extracting regular (drip extraction type) coffee will be described. Put the appropriate triangular paper filter 26 in the dripper 6, put the required amount of coffee powder 41, place the handle 25 on the notation "set" 24A provided on the front of the dripper mounting part 4, and put the dripper 6 from below. Rib 21 of mounting part 4
The handle 25 is turned slightly to the right to bring the handle 25 into the position of the notation "regular" 24B.

Thus, the upper edge 2 of the opening of the dripper 6
The respective locking projections 28 are locked while being slightly pushed up by sliding on the respective tapered portions 22 provided in the ribs 21 on the lower surface of the dripper mounting portion 4. In this state, there is a gap between the upper surface of the upper edge portion 27 of the opening of the dripper 6 and the sealing material 23 on the lower surface of the dripper mounting portion 4. Therefore, the dripper 6 is attached to the dripper mounting part 4 in an open-to-atmosphere state. Before or after the mounting operation of the dripper 6, the lid 11 is removed, and a required amount of water 19 (the amount of water per serving is larger than that of espresso coffee) is poured into the water tank 2 and the lid 1 is removed.
Close 1 securely. As a result, the inside of the water tank 2 is closed.

In this manner, the dripper 6 is mounted on the dripper mounting section 4, and the bottle 7 is placed on the bottle supporting section 5,
With the water 19 put in the water tank 2 and the lid 11 closed, a switch (not shown) is turned on to start energizing the heater 13.

When the heater 13 generates heat, the water 19 in the water tank 2 is heated and boiled while circulating through the outlet pipe 16, the circulation pipe 15, the discharge pipe 17 and the water tank 2. When the water 19 continues to boil, the vapor pressure in the gas phase in the water tank 2 increases, and a force to push down the liquid level WL acts, whereby the hot water 19 in the water tank 2 is removed from the pumping pipe 31. , And is pushed upward to squirt into the dripper 6.

Unlike the case of extracting espresso coffee, the amount of water is large in the case of regular coffee extraction, so that the amount of hot water temporarily stored in the dripper 6 is also large. However, the water level is increased due to the large amount of water. When the height is higher than 6d, the internal volume above the portion is increased stepwise, so that it can be stored in the dripper 6 without overflowing.

Since the interior of the dripper 6 is open to the atmosphere, no pressure is applied to the interior of the dripper 6, and the dripper 6 is exposed to the dripper 6 in the same manner as a normal drip coffee maker.
The hot water 19 temporarily stored therein passes through the portion of the coffee powder 41 by its own weight, becomes a coffee extract, and drops into the bottle 7 from the extraction port 6a.

Thus, in the coffee maker of the first embodiment, both the espresso coffee and the regular coffee can be extracted by simply changing the mounting angle of the dripper 6 using the same device.

The structure of the dripper 6 may be as shown in FIG. The dripper 6 shown in FIG. 7 wraps a stainless steel belt 51 around a body 52 and overlaps both ends 53 and 54 of the stainless steel belt 51.
A stopper plate 55 is inserted from behind, and the handle 25, the ends 53, 54 and the stopper plate 55 are integrally tightened by a set screw 56 inserted into the handle 25, and the stainless steel belt 5
1 is fastened around the dripper body 52.

As a result, the handle 25 is integrated with the dripper 5, and the periphery of the body 52 of the dripper 5 has a two-layer structure with the stainless steel belt 51, so that the strength and the heat retention can be improved.

The pressure adjusting means for switching the inside of the dripper 6 between the closed state and the open-to-atmosphere state may have the structure shown in FIGS. That is, at an appropriate position corresponding to the inside of the rib 21 of the dripper mounting portion 4 of the apparatus main body 1, the ventilation hole 4a vertically penetrating the dripper mounting portion 4 is formed. An opening / closing valve 61 is provided in the ventilation hole 4a, and is connected to an operation knob 63 exposed to the outside by a lever 62.

When the pressure adjusting means having such a configuration is employed, it is not necessary to provide the "regular" rotational position, that is, the "regular" notation 24B as in the first embodiment on the dripper mounting portion 4 side. After the dripper 6 is mounted on the dripper mounting section 4 at the position of “set” notation 24A, the “espresso” in the first embodiment is set.
(To be described as "fixed" instead of this notation).

Thus, either the espresso coffee or the regular coffee is extracted by the same apparatus as described below as desired.

<Espresso coffee extraction> In this case,
With the above-described method, the dripper 6 is moved to the position corresponding to the notation of “espresso” described in the first embodiment by the handle 25.
Rotate and fix until comes. Then, the knob 63 is operated to bring the on-off valve 61 into the state shown in FIG. 9B, that is, the state in which the vent hole 4a is closed. As a result, the inside of the dripper 6 is closed.

Therefore, in this state, espresso coffee can be extracted by heating and boiling the water 19 in the water tank 2 by the heater 13 in the same manner as in the first embodiment.

<Regular coffee extraction> Dripper 6
Is mounted on the dripper mounting portion 4 in the same state as in the case of espresso coffee extraction. Then, the knob 63 is operated to set the on-off valve 61 to the state shown in FIG.
a is released. Thereby, the inside of the dripper 6 is opened to the atmosphere. Therefore, in this state, the water 13 in the water tank 2 is heated and boiled by the heater 13 as in the first embodiment, whereby regular coffee can be extracted.

When the pressure adjusting means having the structure shown in FIGS. 8 and 9 is employed, espresso coffee and regular coffee are selected by the same device only by the switching operation by the pressure adjusting means as in the first embodiment. Can be extracted. In addition, the dripper 6 that is frequently attached and detached
The same applies to the case of espresso coffee extraction and the case of regular coffee extraction. In addition, the dripper 6 is rotated by turning the knob 63 so that the dripper 6 is mounted. Stable and hassle-free operation.

The structure of the pressure adjusting means is not limited to the above-described one, and various other structures generally used can be employed as long as the valve structure can open and close the vent hole 4a. .

Further, in the above embodiment, the appearance of the coffee maker is made substantially symmetrical on the left and right sides as shown in FIG. 1 so as to consider the weight balance and the design effect. The present invention is not limited to this, and may have a structure in which the coffee mill function is omitted or a structure in which the coffee mill 3 is supplementarily added to the side surface of the apparatus main body 1.

Further, although the coffee maker of the above embodiment can be made with either espresso coffee or regular coffee, in the case of the present invention, coffee which extracts espresso coffee using a dripper of a triangular paper filter system is used. The maker may be a gist and may not have a regular coffee extraction mechanism. In that case, any means that can put the dripper 6 in a sealed state, that is, a sealing means may be provided. For example, in the above embodiment, a configuration in which the regular rotation position of the dripper is omitted can be adopted.

As described above, according to the first aspect of the present invention,
When the water in the water tank boils, the water tank is closed, so the steam pressure inside the tank rises and pressurizes the liquid level of the hot water, and the hot water is jetted into the dripper through the pumping pipe to remove the coffee liquid. It can be extracted and the coffee extract can be dropped and stored in the bottle. At this time, the inside of the dripper is sealed by a sealing means that can withstand the internal pressure of 1 to 3 atm. Espresso coffee can be extracted through a triangular paper filter.

According to the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, if coffee is extracted while the inside of the dripper is sealed by the pressure adjusting means, espresso coffee is extracted with a high vapor pressure, and the pressure is reduced. If coffee is extracted while the inside of the dripper is open to the atmosphere by the adjusting means, regular coffee can be extracted (drip extraction) using a normal paper filter, and espresso coffee and regular coffee can be extracted using the same one device. Either can be made.

According to the third aspect of the present invention, the inner shape of the dripper is formed in a funnel shape corresponding to the shape of a triangular paper filter, the upper half is formed in a cylindrical shape, and the inner diameter of the upper half is reduced. By forming a water reservoir between the two ends, which is larger than the inner diameter of the upper end of the half, when using a small amount of water, such as when extracting espresso coffee, almost the lower half of the dripper When hot water for extraction is stored only in a large amount of water, such as when extracting regular coffee, the hot water for extraction can also be stored in the upper half of the dripper. Even if there is a big difference, the same dripper can be used.

According to the fourth aspect of the present invention, a sealable water tank formed in the apparatus main body, a heater incorporated in the apparatus main body for boiling the water in the water tank, and water in the water tank are provided. A circulation pipe that draws water from the bottom to the heater and discharges hot water heated by the heater into the upper air in the water tank, and a triangular paper filter detachably mounted on the dripper mounting part of the device body Dripper, a bottle for storing the coffee extract extracted by the dripper, a pumping pipe provided near the bottom of the water tank in the main body to the inside of the dripper, and a sealing means for sealing the inside of the dripper In a coffee maker equipped with a pump, the part of the water pipe exposed in the upper part of the water tank is higher than the hot water outlet of the circulation pipe. Since the formation of the pressure adjusting hole at the position,
Even if the user mistakenly injects excessive water into the water tank by a measure, coffee can be extracted with hot water that is always sufficiently boiling.

According to the fifth aspect of the invention, in addition to the effects of the first to fourth aspects, the handle is provided on the dripper.
After extraction using high-temperature water, the dripper is removed from the device body to discard the paper filter and coffee powder, and is easy to handle when carrying.

[Brief description of the drawings]

FIG. 1 is a perspective view of a coffee maker according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a state when espresso coffee is extracted and a state when regular coffee is extracted in the embodiment.

FIG. 3 is an exploded perspective view showing the dripper mounting portion and the dripper in the embodiment.

FIG. 4 is a perspective view of the dripper according to the embodiment, which can be partially broken.

FIG. 5 is an explanatory diagram showing an operation of extracting espresso coffee according to the embodiment.

FIG. 6 is an explanatory diagram showing an operation of extracting regular coffee according to the embodiment.

FIG. 7 is an exploded perspective view showing the structure of another dripper used in the above embodiment.

FIG. 8 is a cross-sectional view of a coffee maker in which the pressure adjusting means of the dripper portion according to the embodiment has another configuration.

FIG. 9 is an explanatory diagram of a pressure adjusting unit of another configuration example described above.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Device main body 2 Water tank 3 Coffee mill 4 Dripper mounting part 4a Vent hole 5 Bottle support part 6 Dripper 6a Extraction port 6b Lower half 6c Upper half 6d Step 7 Bottle 11 Cover 13 Heater 15 Circulation pipe 16 Outgoing pipe 17 Discharge Pipe 18 Check valve 19 Water 21 Rib 22 Taper portion 23 Sealing material 24A "Set" notation 24B "Regular" notation 24C "Espresso" notation 25 Handle 26 Paper filter 27 Opening upper edge 28 Locking projection 31 Pumping pipe 31a Water intake Mouth 31b Spout 32 Pressure adjustment hole 41 Coffee powder 51 Stainless steel belt 61 Open / close valve 63 Pick

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tetsu Fukushima 1-1-1, Shibaura, Minato-ku, Tokyo Inside the head office of Toshiba Corporation (72) Inventor Etsuko Nishino 1-1-1, Shibaura, Minato-ku, Tokyo In the head office of Toshiba Corporation (72) Inventor Ikuo Tsukiki 1-1-1, Shibaura, Minato-ku, Tokyo Inside the head office of Toshiba Corporation (72) Kazuo Kitamura 1-1-1, Shibaura, Minato-ku, Tokyo (56) References JP-A-3-210215 (JP, A) JP-A-10-174652 (JP, A) JP-A-62-213711 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) A47J 31/057 A47J 31/30

Claims (5)

(57) [Claims] 1. A sealable water tank formed in an apparatus main body, a heater incorporated in the apparatus main body for heating and boiling water in the water tank, and a dripper mounting portion of the apparatus main body. A dripper of a triangular paper filter type detachably mounted, a bottle for storing the coffee extract extracted by the dripper, and a portion extending from near the bottom of the water tank in the apparatus body to the inside of the dripper. A coffee maker, comprising: a pumping pipe; and sealing means for sealing the inside of the dripper to withstand an internal pressure of 1 to 3 atm. 2. The coffee maker according to claim 1, further comprising pressure adjusting means for switching the inside of the dripper to a closed state capable of withstanding an internal pressure of 1 to 3 atm or an open state to the atmosphere. 3. The dripper has a lower half with a funnel shape corresponding to the shape of the triangular paper filter, an upper half with a cylindrical shape, and an inner diameter of the upper half with the lower half. The coffee maker according to claim 1 or 2, wherein the inside diameter of the upper portion of the half portion is larger than that of the upper portion, and a step portion for water pool is formed between the two. 4. A sealable water tank formed in an apparatus main body, a heater incorporated in the apparatus main body for boiling water in the water tank, and the heater from near a bottom of the water tank. And a circulation pipe for discharging hot water heated by the heater into the upper air in the water tank, and a triangular paper filter detachably attached to the dripper attachment portion of the apparatus main body. Dripper, a bottle for storing the coffee extract extracted by the dripper, a pumping pipe provided in a portion from the bottom of the water tank in the apparatus main body to the inside of the dripper, and 1 inside the dripper. A sealing means for establishing a sealed state that can withstand an internal pressure of 気 圧 3 atm, and a portion of the pumping pipe that is exposed to the air above the water tank. Coffee maker, characterized in that the formation of the pressure adjusting hole at a position higher than the outlet of the hot water ring pipe. 5. The coffee maker according to claim 1, wherein a handle is provided on the dripper.