JPS60222014A - beverage extractor - 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 beverage extractor that can automatically extract delicious coffee liquid by dropping boiling water onto raw materials such as coffee powder. Example configuration and its problems Conventionally, this type of beverage brewer supplies hot water to coffee grounds by introducing water into a heating pipe from the bottom of the water tank and heating it, using steam generated by nucleate boiling. There is a so-called tri-knob type, in which hot water is dripped onto the coffee grounds for about 10 minutes, and a bimetal type, in which the coffee grounds are placed below the water tank and a heating device is installed in the water tank. There was a type that had a temperature release valve and dripped hot water onto the coffee grounds.

However, with these devices, it is difficult to eliminate variations in temperature sensing accuracy, and therefore the hot water supply temperature is not constant.
The problem is that the water temperature is low, and the basic method of brewing delicious coffee is ``dropping boiling, high-temperature water onto the coffee grounds, allowing the grounds to sufficiently swell, and completing the extraction in 3 to 4 minutes.'' However, even when extracting black tea, etc., it is not possible to satisfy the condition of ``always soaking in boiling water for 3 to 4 minutes'', and as a result, the product is rich in aroma without bitterness or astringency. Beverages such as coffee liquid and tea could not be obtained.

Purpose of the Invention The present invention was made in view of the above circumstances, and the hot water to be supplied to raw materials such as coffee powder must be boiled.
The temperature at which it comes into contact with raw materials such as coffee powder is higher than the initial temperature, and the extraction time is completed in 3 to 4 minutes, making it possible to obtain a delicious beverage.The system also heats hot water efficiently and is easy to operate. SUMMARY OF THE INVENTION In order to achieve the above object, the beverage extractor of the present invention has a filter case for storing raw materials such as coffee powder in a container body, and a water extractor. a tank, a heating element having a power supply switch, a circulation waterway that is heated by the heating element and returns to the water tank, a steam detection member that detects steam generated from the water tank, and a vapor detection member provided in the middle of the circulation waterway, and a hot water supply valve that supplies water from the water tank to the filter case in conjunction with the operation of the steam detection member. According to this configuration, hot water is always supplied to raw materials such as coffee grounds. Since it is carried out after boiling, the temperature is higher than the initial stage of pouring, allowing for the extraction of a delicious, aromatic beverage.The heating to boiling is also done by circulating the water in the water tank, so the water circulation effect is effective. The material of the water tank is limited to an expensive metal container that can withstand a heating surface temperature of several hundred degrees. In addition, various materials that can withstand hot water up to 10''C can be used, and the temperature sensing element has various excellent effects such that the sensing accuracy of the boiling temperature is sufficient.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below based on the accompanying drawings. In FIG. 1, reference numeral 1 denotes a vessel body, which is composed of a base 2, and a support 4 having a substantially inverted-shaped eave portion 3, which stands on this base 2. A heating element 5 is installed inside the eaves part 3, and a sheathed heater 6 and a heating pipe 7 are included in the heating element 5. Also heating pipe 7
Both ends thereof are connected to an inlet 9 provided on the lower surface of the concave water tank mounting portion 8 above the eaves portion 3 and to another circulation port 1o.

The inlet 9 is constructed by watertightly connecting an annular body 12 having a protruding piece 11, a connecting tube 14 with a check valve 13 installed therebelow, and the inlet side of the heating pipe 7. , and the other circulation port 10 is formed by watertightly connecting a connecting tube 18 in which an annular body 17 having upper and lower projecting pieces 15 and 16 is installed and a T-shaped pipe 19 connected to the discharge side of the heating pipe 7. is configured.

Reference numeral 20 denotes a water tank that is detachably attached to the water tank storage section 8, and this water tank 20 has an inlet 21 that projects downward.
When the water tank 20 is installed in a predetermined position, the inlet 21 and the backflow port 22 are connected to the connection tube 14.18 on the top surface of the water tank mounting part 8, and the water tank 2o is connected to the connection tube 14. The inlet 21, the inlet 9 of the canopy 3, the heating pipe 7, the circulation port 10 of the T-shaped pipe 19. water tank 20
A circulation waterway 23 is formed by the backflow port 22 .

A water valve 24.25 is installed inside the inlet 21 and the backflow port 22, and the upper surface is covered with a filter cover 26.27. In addition, the water tank 2o is connected to the protrusion 28 on the lower outer circumferential surface of the water tank mounting section 8 and to the inner surface recess 3 of the outer periphery rising shift flange section 29.
0, and a fitting piece 34 that protrudes from the flange hole 32 and is biased by a spring 33 engages with the other concave surface 31, thereby being mounted.

The fitting piece 34 is a release lever 3 provided on the upper surface of the support column 4.
If you move 5 to the left, its tip will align with flange hole 3.
2, and the engagement with the concave surface 31 of the water tank 20 is released. As a result, the operation of attaching and detaching the water tank 2o to and from the vessel body 1 is also possible using this detachment bar 31.

36 is a hot water supply valve, and this hot water supply valve 36 has a spring 3 attached to one end below the annular body 17 in the T-shaped pipe 19 on the circulation port 10 side.
7, a diaphragm 39 located directly below the valve 38 that can be raised and lowered, and the valve 38.
A hot water supply pipe 40 is configured to lead into the inside of the eave part 3 from the side between the shim 39 and the diamond shim 39. Also hot water pipe 40
The other end open portion 41 is disposed opposite to a diffuser 42 attached to the lower surface of the eaves 3 with a watertight packing 43 interposed therebetween.

The diffuser 42 is located approximately at the center of a storage section 43 formed by the lower base 2 and the side supports 4, and has a filter member 44 located below for storing raw materials such as coffee powder. Filter case 45 and this filter case 4
5 is placed thereon, and a cup 48 having a handle 47 whose lower surface can be freely attached to the cup mounting portion 46 of the base 2 is located.

Reference numeral 49 is a filter case lid that is attached to the filter case 4 or the construction surface.The cup mounting portion 46 is provided with a heat retention heater 50 for warming the cup 48 inside the base 2, and a thermostat 51 for controlling the heat retention temperature. It is installed internally.

Reference numeral 52 denotes a steam detection section that projects above the support column 4 and is installed in parallel with the water tank 2o. Inside the vapor detection section, a sliding rod 53 that can be raised and lowered is always urged upward by a bias spring 64. will be incorporated. In addition, a coil spring-shaped vapor detection member 56 made of a shape memory alloy is installed in the upper part of the sliding rod 53 between the flange portion 56 and the inner upper end surface of the vapor detection portion 52, and this vapor detection member 65 outer steam detection section 6
2 is provided with a plurality of holes 57. A steam hole 58 is provided on the side surface of the water tank 20 above the specified water level, and corresponds to the hole 57 of the steam detection section 52.

69 is a water tank lid.

The lower end surface of the sliding rod 53 is located close to the other end surface of the rotatable valve lever 6o, which has one end close to the lower surface of the diaphragm 39 of the hot water supply valve 36.

Reference numeral 61 designates an operating lever that is attached via a lower end fulcrum 64 to a lever 63 that is built into a base plate 62 and is movable up and down, and has a knob 65 protruding outside the device.

The operating lever 61 is always urged upward by a spring (not shown), and when the knob 66 is pushed down, the lever 63 is locked by the locking lever 66 and stops at the bottom. Conversely, if you push up the knob 65, the operating lever 6
The upper end of the operating lever 61 pushes the locking lever 66 by rotating around the one fulcrum 64 to release the locked state. The lowering of the lever operation lever 61 closes a power switch 67 provided on the board 62. Reference numeral 68 denotes a power supply switch for the heating element 5, and its movable piece is brought close to the protruding piece 69 of the valve lever 60.

Reference numeral 70 denotes a locking member that locks the valve lever 60 when it rotates clockwise.
It is built in such a way that it can be canceled by winning the first prize. 7
Reference numeral 2 denotes a waterproof gasket that blocks the vapor detection section 52 from the inside of the vessel body 1.

Here, the shape memory alloy of the vapor detection member 55 is Ti-N.
Although it is made of various alloys such as i-alloy and Cu-Zn, it has the property of generating restoring force and returning to its original state after being amnesticized when heated; There are unidirectional ones that simply return to normal, and bidirectional ones that can shrink when cooled. In this example, T
It is a unidirectional one made of i-Ni, and when it cools and loses its generated force, it returns to the original contracted state set by the bias spring 53. In this case, if a bidirectional one is used, , it is natural that the arrangement of the bias spring 53 becomes unnecessary.

Next, the electric circuit shown in FIG. 2 will be explained. Reference numerals 73 and 74 indicate power supply terminals connected to, for example, a 100V power source, which correspond to the connection terminals 72 and 72 of the magnetic plug in FIG. The power supply terminal 73 is connected to the power supply switch 6 via the power switch 67.
8. Sheathed heater 6, safety thermostat 75, temperature fuse 76 water heating circuit, and heat retention heater 50. A heat-retaining circuit of the thermostat 51 for controlling the heat-retaining temperature is connected to the other power supply terminal 74 .

The operation of this embodiment in the above configuration will be explained. First, put coffee powder into the filter case 46 and cup 4.
8 in the storage section 43. Next, release lever 3
5 to the right side, take out the water tank 20 from the storage part 8, fill it with the required amount of water, and put it back into the water tank mounting part 8. When carrying the water tank 2o, use the water inlet 21 and backflow port 2.
Water does not leak due to the water stop valves 24 and 25 provided in the water tank 2o, and the water does not leak into the recess 3o of the rising flange 29 of the water tank mounting part 8 and the other fitting piece 34 at the bottom of the water tank 2o. By fitting the protrusion 28 and the recess 31, the water tank 2o
is securely fixed to the vessel body 1.

Due to this fixation, the water stop valves 24 and 26 are pushed upward by the protruding piece 11 of the inlet 9 and the upper protruding piece 15 of the circulation port 10, so that the inside of the water tank 20 and the circulation waterway 23 are connected. It goes through. At this time, the communication to the hot water supply valve 36 is closed by the valve 38 and the spring 37.

Next, when the knob 4 part 65 is pushed down, it is locked at the lower part, and the power switch 67 is closed to energize the sheathed heater 6 and the heat-retaining heater 5o. The heating element 5 heats the water in the heating pipe γ due to the heat generated by the sheathed heater 6, and the water in the heating pipe 7 is pushed up into the water tank 20 by boiling steam pressure. Then, from the inlet 9 to the water tank 2o
The water inside is introduced, heated and boiled again, and heated and boiled water is sent into the water tank 2o through the circulation port 10 and the backflow port 22. This operation is sequentially repeated in the one-way circulation waterway 23 by the check valve 13, and the temperature of the water in the water tank 20 is increased. This heating method forcibly circulates the water, and compared to simply heating the bottom surface of the water tank 20, heat is transferred more reliably through the heating pipe 7 and the water does not boil. By pushing up the cold water and heating the cold water again, heating efficiency can be effectively increased in terms of time and heat conduction efficiency.

When the water in the water tank 2o is heated and boiled, steam is generated. This steam comes to blow out from the steam hole 58 with force. Then, steam is ejected from the hole 57 corresponding to the steam hole 58 to the steam detecting member 65 of the steam detecting section 52, and at this moment, the temperature of the steam detecting member 55 is 1° below the ambient temperature of 30 to 40°C.

For example, if the transformation point temperature at which the shape memory alloy of the vapor detection member 65 starts to recover is set at around 70 degrees Celsius, the sudden elongation motion will have a large restoring force due to the temperature difference. It is done. With this action,
The sliding rod 53 is pushed down and the valve lever 60 is rotated clockwise. Then, the other part of the valve lever 6o pushes up the diaphragm 39 and the valve 38 against the force of the spring 37, so the hot water supply valve 36 is opened. and water tank 20
The water inside is discharged through the opening 41 of the hot water supply pipe 40 of the hot water supply valve 36, dispersed by the diffuser 41, and supplied into the filter case 45. When hot water is supplied to the coffee powder, the components of the coffee powder are extracted and passed through the filter 44.
The filtered coffee liquid collects in the lower cup 48. The coffee liquid in the cup 48 is kept warm at a drinking temperature by a heat-retaining heater 50 and a thermostat 61.

Also, when the valve lever 60 rotates, this valve lever 60
The lock member 0 keeps the hot water supply valve 36 open, and at the same time, the protruding piece 69 opens the normally closed power supply switch 6.
As the movable piece 8 is pushed down, the power supply switch 68 is opened, and as a result, the power to the sheathed heater 6 is cut off.
Stop heating the water in the water tank 2°.

When the steam detecting member 56 stops energizing the sheathed heater 6 and stops blowing out steam from the steam hole 68 of the water tank 20, the temperature decreases and the bias spring 5 loses its restoring force.
4, it is compressed to its original compressed state as the sliding rod 53 rises. However, the valve lever 60 is locked as described above and therefore is not linked to the above operation. Further, even after the power supply switch 68 is opened, the heat insulating heater 5o is energized, and when the knob 65 is pushed up after use, the knob 66 is lifted upward together with the lever 63 by the movement of the operating lever 61, and the power switch 67 is turned on. opens. Further, due to this movement, the lever 71 moves the locking member 7o to release the locking of the valve lever 60, and the hot water supply valve 36 is closed again, and the power supply switch 68 is also closed by the raising of the protruding piece 69.

In this embodiment, the container body 1 includes a filter case 46 for storing raw materials such as coffee powder, and a water tank 2.
o, a heating element 5 having a power supply switch 68, and a circulation waterway 23 that is heated by the heating element 6 and returns to the water tank 20.
, a steam detection member 56 for detecting steam generated from the water tank 2o; and a hot water supply valve 36 for supplying hot water to the filter case 45, the heat of the heating element 5 is forcibly circulated through the water in the water tank 20 through the circulation waterway 23 by the vapor pressure of heated boiling water. Since the heat is transmitted efficiently, the water in the water tank 20 can be heated uniformly.

In addition, this heating method does not require the heating element 5 to be attached directly to the water tank 2o, so it can be used with materials that can withstand temperatures of 100°C, and it can be used not only with metal but also with synthetic resin. As No. 26, effects such as improved water injection performance and visual confirmation of remaining water amount can also be achieved. In addition, since the temperature at which hot water is supplied to raw materials such as coffee powder can be increased from the initial stage, it is possible to supply high-temperature water that has been boiled once, so it is possible to remove the dullness of boiling water and to soften the water used.
In addition to being able to supply high-quality water that does not inhibit the components extracted from the raw materials, the components can be extracted at a high initial temperature, allowing the coffee powder to swell sufficiently and extracting the coffee components efficiently, resulting in a rich aroma. Can extract coffee liquid.

Furthermore, since the hot water supply valve 36 is provided in the circulation waterway 23, there is no need to provide an extra waterway configuration compared to one provided below the water tank 20, and the configuration is simplified. Remaining water is also eliminated, allowing effective hot water supply and sanitary conditions inside the vessel 1 due to the elimination of residual water.

In addition, since only boiling steam is always ejected, the temperature accuracy of the steam detection member 55 is sufficient if it can sense the steam temperature.Currently, the temperature accuracy of shape memory alloys varies by ±6°C, which is considered unsuitable for water temperature sensing, which requires accuracy. However, this vapor detection method has the advantage of being able to fully absorb the accuracy tolerances and can be adopted, and is also effective in ensuring the quality of the device by functioning satisfactorily even if the sensitivity deteriorates due to long-term use. It also has This vapor detection method is not limited to this shape memory alloy, and the same effect can be achieved using thermistors, thermostats, etc.

In addition, the hot water supply time can be freely set by the opening/closing stroke of the valve 38 and the hot water supply pipe 4o, so unlike the conventional drip type, hot water can be supplied in a 3 to 4 minute extraction time regardless of the amount of electricity of the heating element. It is said to be ideal because it significantly shortens the time required for about 0 minutes due to the limitations of lifespan and power consumption, and suppresses the production of defective components that cause bitterness and astringency over time.
A short time extraction of 4 minutes is possible, and as a result, the extracted beverage can be rich and delicious without bitterness or astringency. In addition, this hot water supply temperature satisfies the condition for extracting black tea, ``extracting for 3 to 4 minutes using boiling water'', so it can also be used to extract tea confectionery, allowing for delicious beverage extraction. Moreover, since the water tank 2o is removably installed in the container 1,
Water injection and residual water treatment can be easily performed by attaching and detaching only the water tank 2o, making cleanup easier. Furthermore, the power supply switch 68 to the heating element 5 is connected to the steam detection member 65.
The circuit to the heating element 5 is opened in conjunction with the operation of the
It is possible to stop further excessive heating and prevent the heating element 5 from burning out, thereby improving the life of the heater.

Furthermore, by employing a shape memory alloy for the steam detection member 56, one component can serve the two functions of steam detection and pushing up the valve 38 by the hot water supply valve 36, making the device more compact. Since no electrical wiring parts are required, assembly is easy and inexpensive.

In the above embodiment, a coiled spring-like shape memory alloy is used as the vapor detection member 66, but the method is not limited to this method. Alternatively, the valve 38 may be opened by sensing a change in resistance due to a temperature rise caused by steam, or the hot water supply valve 36 may be opened by sensing a temperature rise using a thermostat. In addition, the method for attaching and detaching the water tank 20 may be performed using a bayonet connection other than the one shown in this embodiment, or a simple structure in which the outer periphery rising flange 29 shown in this figure guides and maintains the lower outer circumferential surface of the water tank 2o. It goes without saying that the present invention is not limited to the drawings of this embodiment, and can be implemented with appropriate modifications, including application to drip type, siphon type, etc., without departing from the gist of the invention. According to the above, a container body includes a filter case for storing raw materials such as coffee powder, a water tank, a heating element having a power supply switch, a circulation waterway that is heated by the heating element and returns to the water tank, and the water tank. and a hot water supply valve that is provided in the circulation waterway and that supplies water from the water tank to the filter case in conjunction with the operation of the steam detection member. Therefore, the water in the water tank can be heated efficiently and uniformly, and since hot water is supplied after boiling, the hot water supplied to the raw materials is at a higher temperature than the initial stage of pouring, and as a result, the "boiling" condition, which is said to be the condition for delicious coffee extraction, is achieved. Using high temperature boiling water 3~
It is possible to effectively extract and drink a rich, fragrant coffee liquid with little bitterness or astringency while satisfying the requirement of ``completes extraction in 4 minutes''. Furthermore, the hot water supply valve can be opened automatically and its operation can be performed reliably, making it easy to use.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a beverage extractor showing an embodiment of the present invention, and FIG. 2 is an electrical circuit diagram thereof. 1... vessel body, 5... heating element, 20...
...Water tank, 23...Circulation waterway, 36.
... Hot water supply valve, 45 ... Filter case, 55 ... Steam detection member, 68 ... Power supply switch. Name of agent: Patent attorney Toshio Nakao and one other person 6 63 4 772.7゜Figure 2 476 N'

Claims (4)

[Claims] (1) A filter case that stores raw materials such as coffee powder in the container, a water tank, a heating element with a power supply switch, a circulation waterway that is heated by the heating element and returns to the water tank, and generated from the water tank. and a hot water supply valve that is provided in the middle of the circulation waterway and that supplies water from a water tank to the filter case in conjunction with the operation of the steam detection member. extractor. (2) The beverage brewer according to claim 1, wherein the water tank is detachably installed in the container body. (3) The beverage according to claim 1 or 2, wherein the power supply switch to the heating element opens a circuit to the heating element in conjunction with the vapor detection operation of the vapor detection member. extractor. (4) The beverage extractor 0 according to any one of claims 1 to 3, wherein the steam detection member detects steam by utilizing the shape memory effect of a shape memory alloy.