JPS6345212B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a coffee boiler that extracts coffee by utilizing steam pressure, and is capable of efficiently brewing coffee ingredients in a short time, and also provides a complicated switching means. To provide a coffee boiler having a steam discharge means simply and reliably.

Conventional structure and its problems Conventionally, in the direction of extracting coffee using steam pressure, the steam pressure is used to warm a coffee cup or milk etc. at the same time as coffee is extracted. Some devices have a "cappuccino" function, but their structure is limited to a two-way switching configuration, and if one is open, the other cannot be used at the same time.

Purpose of the Invention The present invention is capable of reliably providing a steam discharge function with a simple configuration without providing a switching means, even in cases where it is difficult to install a switching configuration, or even if it were installed, the configuration would be complicated. be.

Structure of the Invention In particular, the present invention provides a steam discharge means for guiding steam from a water storage container to the outside, and a water heater is provided with a sealing means that acts to close a passage.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

In the figure, reference numeral 1 denotes a base, which is located at the lower part of the water storage container 2, and has electrical components arranged therein. The water storage container 2 has a bottom surface a and a side plate b that are integrated with an outer circumferential extension ring a by welding or interlocking, so that it is watertight so that water can be contained therein. The heat conduction from the heater is more efficiently transmitted to the bottom plate a by forming a higher step part c such that the two are pressed together.

4 is a mounting plate fixed to the lower surface of the bottom plate a by spot welding or the like, and the heat shield plate 5 below the heater is fixed with screws 4.
It is fixed at 0 etc. In addition, a leaf spring 6 is incorporated into this heat shield plate 5, and the leaf spring 6 exhibits a spring property when the heat shield plate 5 is attached to the mounting plate 4, and the upper heater is pressed against the back surface of the bottom plate a and fixed. It has been done.

In this case, the rising portion of the stepped portion c of the bottom plate a serves as a position control for the heater 3, and the heater 3 can be easily assembled without shifting.

Furthermore, the base 1 is assembled into the cut-out piece A of the heat shield plate 5 by fixing it with screws etc. 42, but the inside is equipped with a back plate 7 attached to the lower end, and the heater 3, the heat shield plate 5, etc. It constitutes a storage section 8 that houses electrical components.

Reference numeral 9 denotes a thermostat for temperature control installed at a place higher than the rest of the bottom plate a.

The outer periphery of the base 1 is in contact with the end face of the extended ring α of the water storage container to provide a gap β without introducing heat, and a rising flange for waterproofing is arranged close to the inside of the extended ring α. Reference numeral 10 denotes an insertion portion of the magnetic plug 11 provided on the base 1, and has a guide surface C and a joint surface D, and a metal receiving plate E and a terminal bar 12 are fixed to the joint surface D. Therefore, the magnetic plug 11
Just by inserting the terminal into the insertion part 10, the outer peripheral surface is guided by the guide surface C, and the magnet (not shown) at the tip of the plug is easily attracted to the receiving plate E, and the terminal bar 12 is securely connected to the plug 11 and energized. It becomes possible. On the other hand, when the power is cut off, the plug 11 can be easily removed by pulling out the plug 11 against the magnetic force, thereby achieving the purpose.

The upper part of the side plate b of the water storage container 2 has an annular cylinder d narrowed inwardly near the upper end, and the upper end is a flange part f having a stepped part e extending inward from the annular cylinder d. A locking piece H protruding outwardly and a fixing piece G having a downwardly curved sliding surface E are fixed to the outer peripheral surface of the annular cylinder d by spot welding or the like.

Reference numeral 14 is a funnel-shaped storage case that is inserted through the upper opening of the water storage container 2 and is installed with the upper end flange surface j freely placed on the stepped portion e, and is a coffee machine storage portion in which a receiving surface k having a small hole is fixed. It consists of m and a hot water supply pipe n at the bottom. Reference numeral 15 denotes a storage container that is watertightly and freely fixed to the upper part of the water storage container 2 via a packing 16, and has a bottom surface P.
The outer periphery is a side surface R, and there is a downwardly extending portion S located outside the annular cylinder d of the water storage container, and a discharge port provided at the upper part of the inner center of the storage container 15 protruding downwardly and inwardly. A water riser pipe Q having a communication path with T is integrally formed with its joint mounting surface watertight by suitable means such as welding or interlocking.

Reference numeral 17 denotes a filter, which is a filtering means having small holes, and is attached by holding the outer periphery between the bottom surface P of the storage container 15 and a packing 16 that is positioned and engaged with the projection R. Therefore, the filter 17 can be attached or detached by easily removing the gasket 16 from the bottom surface P.

A handle 18 has one end rotatably attached to a metal fitting fixed to the upper part of the side surface R, and a rotatable shaft 19 is incorporated in the other end.

Also, a hole U is provided in the extending portion S on the opposite side of the handle 18.
is provided.

Here, to attach the storage container 15 to the water storage container 2, the extension hole U of the storage container 15 is fitted into the locking piece H on the upper part of the water storage container 2, and the handle 18 on the opposite side is rotated to the left. Then, the upper surface of the rotating shaft 19 becomes the water storage container 2.
It rolls on the sliding surface E of the fixed piece G, climbs over its protrusion, and is fixed, and the gasket 16 is attached with some deformation. The packing 16 is installed so that the water storage container 2 and the storage container 15 are watertight.

20 is a lid that covers the upper opening of the storage container 15, and V is a spout formed at the upper part of the side surface R of the storage container.
In terms of safety, a temperature fuse 13 is installed in the base housing 8 to prevent abnormal temperature rise, and
A safety valve 21 is installed above the water storage container 2, which is made up of a valve body W whose opening hole y is biased from the outside by a spring x.
Next, the steam discharge device will be explained.

The upper side plate b of the water storage container 2 has a substantially cylindrical steam port A45 having a threaded portion B on the inner surface opposite to the end flange A, and one end of the steam port A45 is screwed into the threaded portion B of the steam port A45 to open the outer side. A steam port B46 protruding from the top is fixed. At the other end of the steam port B relative to the threaded portion, a guide hole D is provided in the inner flange end face C.
Here, the end face flange A of the steam discharge port A45 has a steam packing 4 having a U-shaped cross section and surrounding the end face opening K.
7 is inserted.

48 is a substantially T-shaped valve body having a flange surface E that is incorporated from the inside, and the other end is a steam discharge port B4.
It projects outwardly while being guided by the guide hole D of No. 6, and an opening/closing operation button 49 is attached to the threaded end portion F. Here, the spring L is used so that the valve body 48 always urges the steam gasket 47 from inside with a spring force to close the end face opening K, and the retainer M and the handle N that assemble and hold the spring L are connected to the steam discharge port. A, BL45,
It is located within 46.

Further, a joint 51 to which a U-shaped steam pipe 50 is fixed is installed at the upper outer side of the steam discharge port B46 via a threaded portion I.

The spring L keeps the valve body 49 open at the end face K.
Keep it closed and tight. When you want to discharge steam, press the opening/closing operation button 49 against the spring force, and the valve body 48 opens the end face opening K, so that the steam can be discharged from the steam discharge port.
A. The steam is discharged from inside the B45, 46 through the steam pipe 50 and out of the drain port 53.

In this embodiment, in addition to the above configuration, a valve body 52 is provided at the lower part of the water riser pipe Q, the valve element 52 having a steel ball inside and the outside wrapped with silicone rubber or the like. Here, the silicone outer skin is elastically deformed and can be easily press-fitted into the riser pipe Q for the purpose of simplifying the assembly, and also to reduce the impact noise caused by the movement of the valve body 52 during steam discharge or movement operation. purpose. Regarding steam discharge, if you have a coffee extraction path and a steam discharge path like this, if you open both paths at the same time, the steam will escape to the side with less resistance, and the milk, etc. in the cup will be discharged as shown in Figure 3. Even if it is not heated, steam will not be blown out into the cup and the purpose will not be achieved.

Therefore, the conventional structure has been to close one of the paths or to have a path switching means.

However, in a case like the configuration of the embodiment, it is difficult to install the above conventional method, and even if it were installed, the configuration would be complicated and the usability would be very poor. However, in the case of the embodiment, the above-mentioned conventional structure is not adopted, but the structure is simple and reliable.

In other words, when the steam in the water storage container 2 is spouted into the cup by a steam discharge operation, the water riser pipe Q having the other open passage acts on the valve body 52 to prevent the steam from escaping upward to the water riser pipe Q. In other words, the valve body 52 is a pressure sealing means that acts to seal the internal pressure of the water storage container 2 with a certain force. Naturally, at this time, the weight of the valve body 52 is set to be greater than the water pressure resistance within the cup. On the other hand, in the case of normal coffee extraction which does not require steam discharge, since the entire system is sealed, the pressurized steam pressure easily pushes up the valve body 52 in the water riser pipe Q to perform coffee extraction. In experiments, good experimental results have been obtained with the weight of the valve body 52 being around several grams, although it depends on the cup water level.

In other words, even in the case of coffee extraction only, the passage closing force of the riser pipe Q is a force that does not pose a problem with respect to the steam pressure.

Therefore, the arrangement of the valve body 52 does not pose any problem when it comes to coffee extraction, and when it is desired to discharge steam, it can be operated with a cup as shown in Fig. 3 without the need for any complicated means. When the knob 49 is pushed open, steam can be discharged due to the arrangement of the valve body 52.

FIG. 5 shows an embodiment of another sealing means for the water storage container 2 in place of the valve body 52, which is interposed between the receiving surface K in the storage case 14 and the hot water supply pipe n. .

Its structure includes a valve body 62 made of silicone rubber or the like that closes the upper end surface of the hot water supply pipe n by the biasing force of a spring 61 installed in a receiver 60 fixed to the lower surface of the receiving surface k, which has a sealing pressure effect. Regarding the above-mentioned valve body 5
It has the same effect as 2.

The electric circuit will be explained with reference to FIG.

Reference numeral 12 is a terminal bar fixed within the base 1, and is connected to a power source by inserting the magnetic plug 11. A temperature fuse 13, a thermostat 9, and a heater 3 are connected in series to the circuit.
Reference numeral 22 is a rising alarm lamp which is connected in parallel to the thermostat 9 and lights up in conjunction with the opening of the thermostat 9, and is installed in the base 1 so that it can be confirmed from the outside. ing.

Next, the operation of the above configuration will be described.

First, by rotating the rotating shaft 19 of the handle 18 to the right side of the fixed piece H, the water storage container 2 is removed.
Release the fixing force, move the hole U away from the locking piece H, and remove it. Next, the storage case 14 inside the water storage container 2
Take out.

Then, a predetermined amount of water is supplied into the water storage container 2, and the storage case 14 is placed from above.

After that, a predetermined amount of coffee powder to be extracted is put into the storage case 14, and the storage container 15, which has the valve body 52, the gasket 16, and the filter 17 on the upper part, is placed on the water storage container 2 by reversing the removal method described above. Place it on and fix it.

Finally, when the magnetic plug 11 with one end connected to an outlet is connected to the insertion part 10 of the base 1, the circuit is closed and the heater 3 is energized and generates heat to heat the water in the water storage container 2.

Although the heater heat is not effectively transferred into the water storage container 2 from the upper surface and outer peripheral surface that are in contact with the bottom plate a, by selecting a material with good thermal conductivity as the constituent material,
Furthermore, the entire water storage container 2 acts as a heating element to effectively heat the water.

The heated water expands and pushes down the water level in the sealed water storage container 2 by the amount of expansion. As a result, the water level in the hot water supply pipe n rises.

At this time, the water level has not yet reached the receiving surface k in the coffee storage case 14.

When it is further heated and reaches the boiling point, its volumetric expansion is accelerated dramatically, and it becomes vapor pressure, which instantly pushes down the water surface, so that the high-temperature hot water rises through the water supply pipe n and hits the ground coffee in the storage compartment m on the receiving surface k. The molten metal passes through the small hole, easily pushes up the valve body 52, and is ejected and poured into the storage container 15 from the discharge port T at the top of the water riser pipe Q.

The basis of coffee extraction is the effective extraction of ingredients using high-temperature hot water. On this point, in this embodiment, high-temperature hot water is supplied and is pressurized by steam pressure for extraction. Therefore, the coffee grounds are sufficiently swollen by the high-temperature hot water, making it easy to extract the components, and the pressure allows the components to be extracted. It can be done easily in a short time, and it is possible to effectively extract delicious coffee without waste.

The extraction time is 300 minutes unlike other drip methods.
The extraction time is significantly shortened to around 1 minute with cc.

After hot water is supplied in this way, the inside of the water storage container 2 has a structure in which some water remains depending on the distance between the hot water supply pipe n and the inner bottom surface of the water storage container 2.

This prevents the upper surface of the heater 3 from drying and prevents an abnormal temperature rise in the heater 3, ensuring a long product life and ensuring that the container on the upper part of the heater 3 does not heat up.
This is necessary not only to ensure commercial value such as eliminating discoloration of parts, but also to generate steam for the steam discharge function of the present invention. When heating the milk, etc. in the cup from the steam pipe 50, as shown in FIG. The steam is discharged from the steam pipe 50 by preventing the valve body 52 from discharging steam from the riser pipe Q. Therefore, you can enjoy various effects such as heating milk with steam and mixing it with coffee to make ``cappuccino'', or heating a cold coffee cup to make the beautiful coffee that is made harder to cool down and drink more deliciously. Therefore, the amount of water initially supplied into the water storage container 2 is the desired amount of coffee plus the amount of remaining water.

The above-mentioned steam discharge operation is possible even when steam is generated during coffee extraction.

When the temperature inside the water storage container 2 rises with water remaining, the heater 3 is turned off by the action of the thermostat 9, and the notification lamp 22 is turned on to notify the user that the coffee is ready. Thereafter, the thermostat 9 keeps the container 2 at a constant temperature. When the electricity is cut off and the coffee is poured into a cup, the magnet 11 can be pulled out from the base 1 and the coffee can be carried anywhere and poured without worrying about the troublesome cord.

Effects of the Invention As described above, the present invention provides a means for selecting two routes by providing a simple sealing pressure means in the coffee extraction route while having a coffee extraction route and a steam discharge route in a coffee boiler having a structure that generates steam. Steam discharge can be easily and reliably discharged when necessary without providing a.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a coffee boiler showing an embodiment of the present invention, FIG. 2 is a plan view of the same, FIG. The electric circuit diagram, FIG. 5, is a sectional view of a portion forming the sealing means in another embodiment of the present invention. 1...Water storage container, 3...Heater, 14...Storage case, 15...Storage container, 48...Valve body.

Claims (1)

[Claims] 1. A heating element, a water storage container for storing water, a coffee powder storage case having a filtering means, a storage container for storing filtered coffee liquid, and pouring boiled water in the water storage container into the coffee powder and guiding it to the storage container. A coffee boiler comprising a hot water supply device, a steam discharge means for guiding steam from a water storage container to the outside, and a sealing pressure means for closing a passage in the water supply device.