JPS61143025A - Coffee brewer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a coffee brewer that can automatically extract delicious coffee liquid by dripping boiling water onto coffee grounds.

Conventional technology The conventional method is to drip hot water onto coffee grounds to obtain coffee liquid.The method involves introducing water from the bottom of a water container into a heating pipe, heating it, and partially nucleate boiling the water inside the heating pipe. There is a drip type method in which water is raised using the steam generated by the water, and the water is dripped onto coffee grounds over a period of about 10 minutes, or a drip method in which coffee grounds are placed below a water container with a heating element and a bimetallic temperature sensing valve is installed. There was a type that dripped hot water onto the coffee grounds.

Problems to be Solved by the Invention Due to the structure of such conventional systems, the temperature of the hot water initially discharged while containing cold water is low, and the temperature gradually rises to below 86°C even when the hot water is completed. However, the problem is that it is difficult to eliminate variations in temperature sensing accuracy and the water supply temperature is not constant.The secret to extracting a rich and fragrant coffee liquid is to supply hot water from the initial stage using high-temperature water that has already been boiled. The conditions of "complete the extraction in a short time (approximately 3 to 4 minutes) so as to sufficiently swell the coffee powder and reduce extraction of defective components" could not be satisfied.

The present invention solves these problems by making sure that the hot water supplied to the coffee grounds has already been boiled, making the temperature at which it contacts the coffee grounds higher than the initial temperature, and shortening the time required to extract the coffee liquid. To provide a coffee boiler that can be completed in just 3 to 4 minutes and can extract a rich and fragrant coffee liquid.

Means for Solving the Problem In order to solve this problem, the present invention provides a filter case for storing coffee powder, a water container having a heating element in the lower part, a steam port and a water inlet in the upper part, and a water container for the water container. a lid body that covers the water inlet; a steam detection element that operates by detecting steam generated from the steam port when the water in the water container is heated and boiled; and a hot water supply valve for supplying water to the filter case, and the lid body is provided with means for preventing it from floating due to the steam pressure inside the water container generated by heating and boiling.

This configuration eliminates variations in the opening operation of the hot water valve that occur due to various usage conditions, such as when the lid floats up or down and steam is not sufficiently ejected from the steam port, and allows boiling in the water container to be constantly detected. This can be done in a timely and reliable manner, and the pouring of hot water into coffee grounds is guaranteed to be stable and reliable under certain conditions, so that a rich, fragrant, and delicious coffee liquid can always be extracted.

EXAMPLE An example of the present invention will be described below based on the drawings.

First, a first embodiment will be described based on FIGS. 1 and 2. In Figure 1, (1) is the vessel body.

This vessel (1) consists of a base (2), a container part (3) located above this base (2), this container part (3), and a base (2).
This vessel body (1
), with the right side cut out and released.
5) is formed. (6) is a stainless steel water container attached to the upper part of the container part (3), with a heating element (7) at the bottom.
) and hot water supply valve (8) are installed, a steam port (9) is formed on the side wall surface above the specified water level in the upper part, and a water inlet (10) is formed in the upper opening. is the lid (1
2) is installed. (12) is provided on the outer flange surface of the lid (11), and the flange surface (13) of the water inlet (10)
(14) is an L-shaped hook (12)
A locking plate located on the opposite side of the lid (11) and slidably attached to the lid (11) in the radial direction. Similar to the L-shaped hook (12), the L-shaped hook (12) holds the flange surface (13) of the water inlet (10).
It has a form locking part (15) and is always urged outward in the radial direction of the lid (11) by a spring (16). Therefore, when the knob (14a) of the lock plate (14) is pushed inward in the radial direction of the lid (11), the flange surface of the L-shaped locking portion (15) (
13) is released, and this operation releases the lid (
11) can be attached to and detached from the water inlet (10).

(17) is a stainless steel lid cover that covers the bottom surface of the lid body (11), and includes a lock plate (14) and a bone (16).
It is installed on the top of the lid (11) to have an adiabatic shielding effect so that steam and heat in the water container (6) are not directly transmitted.

The hot water supply valve (8) is attached so that the valve body (19) attached to a valve stem (18) that can be raised and lowered is always closed by a valve spring (20), and the valve body (18) is attached to a valve spring (20). (20)
When it rises against the force of , the valve opens and the water in the water container (6) is guided through the hot water supply pipe (21) to the hot water supply port (22) opened above the storage part (5). (23) is a hot water diffuser detachably attached to the hot water supply port (22);
) is disposed below the hot water inlet (22) and the cup (25
) is a filter case that is placed on the top surface, and has an extraction port (26) on the bottom surface, a filter (27) for storing coffee powder inside, and a case lid (28) on the top. are doing. The filter case (24) has a cup (2
5) is formed on the base (2) together with the cup mounting part (2).
9). (30) and (31) are a heat retention heater for keeping coffee liquid warm and a thermostat for temperature control, which are installed in the base (2) of the cup placement part (29);
(32) is a vector frame for the magnetic plug (33). (34) is the support (4) on the steam port (9) side of the water container (6).
) It is a substantially cylindrical steam detection tube that protrudes from the upper surface and is arranged in parallel with the water container (6), and has a plurality of opening holes (35) formed in the upper side surface facing the steam port (9). This opening hole (3
A vapor detection element (36) is arranged above the vapor detection tube (34) where the vapor detection tube (34) is located. This vapor detection element (36)
is in the shape of a coiled spring, and is normally pressed and deformed by the spring force of the bias spring (37) located below, and is tightly attached, and it expands with restoring force to its original state after being memorized at a temperature below 100 degrees Celsius. Ti-Ni or Cu-
It is made of a shape memory alloy such as AIL-Zn. This extension movement of the vapor detection element (36) is transmitted to one end of a rotatable valve lever (39) by a lower sliding rod (38) which can be raised and lowered. At the upper end of the sliding rod (38) is a vapor detection element (
36) and the vapor detection tube (34).
) is a transparent dome (41) that covers the top of the vapor detection tube (34).
) is located within. The valve lever (39) is rotated to open the power supply switch (42), which becomes a normally closed contact, and connects the heating element (
7) and the protruding piece (43) that disconnects the circuit to the hot water supply valve (8).
) has a push-up portion (45) that comes into contact with the lower end surface of the valve stem (18) that protrudes from the diaphragm (44). (46
), the valve lever (39) rotates to open the hot water supply valve (8),
When the power supply switch (42) is opened, the valve lever (39)
A spring-loaded locking lever that locks the (47
) and (48) are self-returning power and stop knobs that are provided on the top of the pillar (4), and are similar to the power knob (47).
) holds the power switch (50) in the open state with the spring-loaded locking plate (49) when pressed down.6 The locking knob (48) locks the locking plate (49) and the locking lever (46). It has a release piece, a power knob (47) and a valve lever (3).
9) Release the locked state.

Figure 2 shows the electrical circuit diagram, (51) and (52) are 10
This is a power supply terminal connected to the 0V power supply terminal, and corresponds to both contacts of the magnetic plug (33) in FIG. Power terminal (5
A power switch (50) is connected to 1), and a series circuit of a heat retention heater (30) and a thermostat (31) is connected between the power switch (50) and the power terminal (52).
A series circuit of a heating element (7) via a power supply switch (42), a safety thermostat (53) for preventing dry firing, and a temperature fuse (54) is connected via common contacts (55) and (56).

Next, the operation of the first embodiment having the above configuration will be explained. First, coffee powder is put into the filter (27), and a predetermined amount of water is poured into the water container (6). When the magnetic plug (33) with one end inserted into the outlet is connected to the vector frame (32) and the power knob (47) is pushed in, the power switch (50) is closed and the heating element (7) and the insulating heater (30
) is energized. The water in the water container (6) is heated by the heating element (7) and its temperature rises, and at around 100°C steam is produced from the water surface, but as the heating progresses further and reaches the boiling point of 100°C, it turns into steam. change.

Steam is generated continuously. In addition, the steam will be able to fly out even from a small gap, and will be spouted out from the steam port (9) at the top of the side wall of the water container (6).

The ejected steam passes through the steam detection tube (3) facing the steam port (9).
4) Steam detection element (36) inside the opening hole (35)
corresponds to Then, the steam causes the temperature of the steam detection element (36) to rapidly rise to 100° C. from the previous ambient temperature. This phenomenon occurs rapidly in terms of time. Then, the compressed shape memory alloy in the shape of a coiled spring instantly stretches with restoring force. The movement is naturally caused by the bias spring (
37), which pushes down the sliding rod (38) and rotates the valve lever (39) counterclockwise.

Rotation of the valve lever (39) pushes up the valve stem (18) to open the hot water supply valve (8), and the protruding piece (43) opens the power supply switch (42), and in this state, the locking lever (46)
) maintained by Therefore, further heating of the water container (6) by the heating element (7) is stopped to eliminate excessive heating and dry burning after draining.

Also, when the hot water supply valve (8) is opened, boiled high-temperature water is passed through the hot water supply pipe (21) and the hot water supply port (22) to the hot water diffuser (23).
) and poured into the coffee grounds in the filter case (24). Here, the time for pouring hot water into the coffee powder and extracting the coffee liquid depends on the opening method of the hot water supply valve (8), the diameter of the hot water supply pipe (21), and the hot water diffuser (
By appropriately setting the 4° channel shape method according to 23), it is possible to suppress the increase in the output of defective components due to time changes, and to extract the active components in a short time of 3 to 4 minutes, which is said to be the most efficient extraction method. I'm trying to complete it. The hot water poured over the coffee grounds is boiled once, which removes limescale and carbon dioxide contained in the tap water and prevents unpleasant odors from entering the coffee grounds. In addition, hot water is supplied to the coffee grounds by opening the valve after boiling, making it possible to supply hot water at a high temperature from the beginning, and satisfying the temperature condition of 95 to 90°C, which is considered to be the optimum water supply temperature. Therefore, the coffee powder can sufficiently swell and swell, allowing the coffee extract to be efficiently extracted and producing a rich and fragrant coffee liquid. The extracted coffee liquid is filtered by a filter (27),
It is stored in the cup (25) through the extraction port (26) and kept warm. This extraction process can be enjoyed by observing the downward movement of the sliding rod (38) and the movement of the sensing part (40) inside the dome (41). On the other hand, the extended vapor detection element (36
) stops ejecting steam from the steam port (9) due to power cut-off of the heating element (7), so it is cooled by the atmosphere and loses its restoring force, and is then pushed back to its original state by the bias spring (37). However, the valve lever (39) is the locking lever (46)
The locked state is maintained by After use, close the locking knob (
48), the power knob (47) and valve lever (39) are pressed.
) is released, the heating element (7) and the insulating heater (30) are powered off, and the hot water supply valve (8) is closed.

In this configuration, the steam detection element (3) is connected to the steam port (9).
6) It is an absolute condition to guarantee the hot water supply conditions that the steam jet is reliably stable. That guarantee is always the steam vent (9
) is also opening to emit steam. However, steam generated by heating the water temperature may adhere to the upper part of the inner surface of the water container (6) and condense therein, so that it may reach the steam port (9) through the inner surface and adhere to the steam port (9). or,
This phenomenon promotes the generation of steam and steam by boiling,
The increased quantity facilitates this and increases its opportunities. Also, when boiling, steam bubbles swell above the water surface, become bubbles that reach 15 to 20 cm above the water surface, burst and disappear, resulting in a repeated growth-disappearance phenomenon, and the ruptured water droplets scatter and form water. The bubbles adhere to the inner surface of the water container (6), and sometimes the bubbles themselves adhere to the inner surface of the water container (6). Furthermore, the phenomenon of blockage of the steam port (9) due to adhesion of water droplets increases with repeated use, increasing the chances of this happening. Moreover, these steam vents (9
The phenomenon of blockage due to adhesion of water droplets may also occur when water is poured into the water container (6), and the scattered water droplets directly adhere to the steam port (9) and block the steam port (9). When the steam port (9) is covered with water droplets in this manner, the internal pressure of the water container (6) increases, and a large internal pressure is applied to the lid (11). Therefore, if the lid (11) is not provided with any means, the lid (11)
) floats up due to its internal pressure and steam escapes. This causes a vicious cycle in which the internal pressure of the water container (6) decreases and is heated until the internal pressure increases again, pushing up the lid (11), which interrupts or delays the steam jet from the steam port (9)6. , the steam jet is interrupted halfway and the steam detection element (
36) may not be able to raise the temperature and the hot water supply valve (8) may not open, or the hot water supply time may be extended halfway and sufficient hot water may not be supplied to the coffee grounds, or even the steam injection start time may be delayed. There are problems such as delay in energizing the heating element (7) and heating the water container (6) more than necessary, resulting in uneconomical power consumption and accelerated thermal deterioration of parts life. .

However, in this configuration, since the lid (11) is securely attached to the water inlet (10), the water inlet (10)
The temperature inside the water container (6) increases quickly, and the internal pressure increases due to the steam inside the water container (6) after boiling. Therefore, even if there are water droplets attached to the steam port (9) from the beginning.

The increase in internal pressure is large and instantly blows away water droplets, opening the steam port (9).
) is ensured without any time delay. Also, even if water droplets that have condensed on the way adhere to the steam port (9),
Steam does not escape due to the lifting of the lid (11), and water droplets are immediately removed due to the increase in internal pressure, which does not interfere with the temperature rise of the steam detection element (36).According to experiments, steam of about φ6 mouth (9) and a water inlet of about φ90 (
When placing a 30g lid (11) on a water container (6) with a water inlet (10) and blocking the steam port (9) with water droplets, the steam ejection time could be extended to 3 to 4 minutes; 10), the delay time was also shortened to within 15 seconds, reaching a level that does not pose a problem in actual use.

In addition, there was no phenomenon in which the steam outlet (9) was blocked by condensed water during steam jetting and the steam discharge condition changed. Therefore, the internal pressure rises faster, the steam is spouted from the steam port (9) faster, and the steam is quickly spouted to the steam detection element (36). Achieved temperature rise to 100℃.

The effect of speeding up the sensing operation speed and immediately rotating the valve lever (39) can be obtained.

Hereinafter, as shown in H, the coffee brewer of this embodiment has a filter case (24) for storing coffee powder, a heating element (7) at the bottom, and a steam port (9) and a water inlet (10) at the top. A water container (6) having a water container (6), a lid body (11) that covers the water inlet (10) of the water container (6), and a lid body (11) that covers the water inlet (10) of the water container (6) and detects the steam generated when the water in the water container (6) is heated and boiled. A vapor detection element (36) operates in conjunction with the operation of the vapor detection element (36) to transfer water from the water container (6) to the filter case (2).
4), and a hot water supply valve (8) for supplying hot water to the lid body (11).
) is equipped with a locking device for the water inlet (10) and other means for the water inlet (io) to ensure that steam is ejected from the steam inlet (9) due to the steam pressure in the water container (6) generated by heating and boiling. This eliminates the problem of water droplets adhering to the steam port (9) and changing the state of steam ejection from the steam port (9) depending on various usage conditions. When the water in the water container (6) is boiled, the steam is reliably detected and the hot water supply valve (8) and power supply switch (42) are opened, and the conditions for supplying hot water to the coffee grounds are adjusted. Stable and guaranteed. Therefore, the hot water poured into the coffee grounds always satisfies the conditions that ``the water should be boiled once, the temperature at which it comes into contact with the coffee grounds should be high from the beginning, and the time required to extract the coffee liquid should be completed in a short time.'' This allows you to efficiently extract the extract from the coffee powder and always drink a rich, fragrant and delicious coffee liquid. or,
Boiling water is used to blow away unpleasant odors in the water used, and the odors in the water used do not mix with the coffee liquid.
Since the closed configuration of the water inlet (10) improves the airtightness inside the water container (6), it is natural that the heating efficiency increases, but it also increases the steam ejection time, which increases the uneconomical effect of unnecessarily energizing the heating element and extends the heating process. There is no problem of deterioration of the life of parts due to this, and the waiting time for the user is also eliminated. In addition, the steam ejection speed increases and the steam detection element (36) is instantaneously and uniformly
The fact that the temperature can be raised means that the steam detection element (36) can move smoothly, opening the hot water supply valve (8) and opening the power supply switch (42), thereby eliminating unnecessary steam ejection time. Therefore, there is no partial heating phenomenon of the vapor detection element (36), and the heating time does not become long, so there is no possibility of excessive heating.

It is also expected that the repeated life of the vapor detection element (36) will be significantly extended. In addition, in the configuration of this embodiment, the vessel body (1
) has a water container (6) above it, making it unstable and heavy at the top, so there is a high chance of the container falling over, and in addition, the water container (6)
The temperature inside the water inlet (10) is heated up to 100 degrees Celsius, so if it falls over accidentally, boiling water will flow out, causing deformation and deterioration due to the temperature of the floor surface, etc., and there is a high risk of burns. The mounting structure of the lid (11) greatly reduces the risk of the lid falling over and spilling out.

In this embodiment, the steam port (9) is connected to the water container (6).
), but the same effect can be achieved even if it is formed integrally with the lid (11), for example, and it is not necessarily attached to the water container (11).
8). Further, although the lock plate (14) is placed on the lid (11) side to provide a means for closing the water inlet (10), it may be placed on the water container (6) side.

Furthermore, a hot water supply valve (8) is provided on the bottom of the water container (6),
It may be placed in the middle of the hot water supply pipe (21), or the steam detection element (
36) is made of a shape memory alloy, but it may also be configured in combination with a temperature sensing element such as a thermistor and a solenoid valve, and it goes without saying that it may be adopted with appropriate changes within the scope of the gist of the above configuration. be.

Furthermore, the closing means by the lid (11) of the water inlet (10) can also be configured as shown in FIGS. 3 and 4 showing other embodiments. That is, in the embodiment shown in FIG. 3, an L-shaped groove (58) is formed on the flange surface (57) of the water inlet (10) of the water container (6) instead of the lock plate (14) of the first embodiment. The lid cover (17) of the lid body (11) is provided with a protruding step (59) facing the groove (58) on the outer surface thereof.
The lid (11) can be attached to the water inlet (10) by rotating it. In addition, the embodiment shown in FIG. 4 has a lid (1
1), even if water droplets adhere to the steam port (9), the lid (11)
) to resist lifting due to increased vapor pressure of heavy objects (
60) is added and integrated to enable water droplet scattering from the steam port (9).

Effects of the Invention As described above, according to the present invention, steam can be ejected from the steam port in a timely and reliable manner, and hot water supply conditions to coffee grounds are guaranteed to be stable regardless of changes in usage conditions. A 6-pronged water container that uses boiling water and supplies high-temperature hot water from the beginning in a short time to always satisfy the extraction conditions for delicious coffee liquid and extract a rich and aromatic coffee liquid. It is possible to perform heating with less waste due to airtightness and stable steam jetting, is excellent in economy, and can prevent deterioration of component life.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional view showing a first embodiment of the present invention, FIG. 2 is an electric circuit diagram thereof, and FIGS. 3 (A) and (B) are sectional views of main parts showing other embodiments of the present invention. and an exploded perspective view of the main parts, and FIG. 4 is a sectional view of the main parts showing still another embodiment of the present invention. (6)...Water container, (7)...Heating element, (8)...
・Hot water valve, (9)...steam port, (10)...water inlet, (11)...lid, (12)...L-shaped hook,
(13)...Flange surface, (14)...Lock plate.

Claims (1)

[Claims] 1. A filter case in which coffee powder is placed, a water container having a heating element at the bottom and a steam port and a water inlet at the top, a lid body that covers the water inlet of the water container, and a case in which the water in the water container is heated to boiling point. a steam detection element that detects steam generated from a steam port and operates; and a hot water supply valve that supplies water in the water container to a filter case in conjunction with the operation of the steam detection element; A coffee boiler equipped with a means to prevent water from rising due to the steam pressure inside the water container that is generated by heating and boiling.