JPH0685740B2 - Electric coffee heater - Google Patents

Description

TECHNICAL FIELD The present invention relates to a drip-type electric coffee brewer.

2. Description of the Related Art In a conventional drip-type electric coffee brewer, Murashi, which is a coffee extraction method for the purpose of extracting delicious coffee, that is, after primary hot water supply, the hot water supply is temporarily stopped to swell the coffee powder, In some cases, this facilitates the elution of coffee extract, and then incorporates a method of performing secondary hot water supply as a function.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in this configuration, since the water is locally boiled and discharged in the heating portion, the hot water supply temperature cannot be a high temperature at which coffee powder can be swelled. Further, in the initial stage of coffee extraction, unfilled and unheated water is discharged into the coffee powder, and as a result, there is a problem that the original purifying effect is not exhibited. It was

The present invention solves such a problem, and an object of the present invention is to provide an electric coffee brewer capable of performing primary hot water supply with boiling water and sufficiently exerting an effect of uneven distribution. To do.

Means for Solving the Problems In order to solve the above problems, the present invention provides a motor-type time for controlling the operating time of a drive motor for coffee bean crushing and the energization of a heater for introducing and heating water in a tank. A switch, a hot water supply switching device for switching between circulating water heated by the heater to a tank or supplying hot water to a filtration chamber for extracting coffee, and hot water supply when the water temperature in the tank reaches a predetermined temperature. A heat responsive member for operating the switching device, wherein the time switch stops the operation of the drive motor to switch to energizing the heater, and then temporarily stops,
In addition, the timed operation is started again in association with the operation of the hot water supply switching device, and after a lapse of a predetermined time, the energization of the heater is stopped for a certain time.

Action According to the above configuration, since the hot water heated to a sufficiently high temperature is poured into the coffee powder from the initial state, it is possible to sufficiently swell the coffee powder and maximize the effect of the unevenness.

Embodiment One embodiment of the present invention will be described below with reference to the accompanying drawings. In FIGS. 1 to 6, 11 is a main body, and the main body 11
The crushing and filtering container 12 for crushing the coffee beans and extracting the coffee liquid is stored in the upper part in a freely removable manner, and the drive motor 13 for crushing the coffee beans is built in the lower part, and further water is stored in the back part. The tank 14 can be detachably attached. The crushing filtration container 12 has a drive motor 13
A substantially cylindrical raw material crushing chamber 15 having a built-in cutter 10 driven by, and a filtration chamber 16 for accommodating and extracting coffee beans crushed in the raw material crushing chamber 15 and assembled, are assembled together, The raw material crushing chamber 15 and the filtration chamber 16 communicate with each other through a porous portion 17 provided in a part of the peripheral wall of the raw material crushing chamber 15.

Reference numeral 18 denotes a hot water supply switching device that reduces the pressure of hot water and steam that is guided from the tank 14 to the water pipe 20 through the check valve 19 and that is heated by the heater 21 and jets out. Discharge port 23 that opens toward the other end and is connected to the water pipe 20 at the other end
And a substantially cylindrical hot water outlet 24. Further, the hot water outlet 24 is provided with a hot water guide 26 which is rotatably supported up and down and is constantly urged by a spring 25 in the direction of the stirring chamber 16, that is, in the direction of arrow A. Open the hot water that flows out
Tank 14 through 27 or filtration chamber 16 through opening 27
Can be selectively led to any of the following. Further, the hot water guide 26 is provided with a locking portion 28.

Reference numeral 29 denotes a heat responsive member disposed near the bottom of the tank 14, and the heat responsive member 29 is made of a shape memory alloy, and when the water temperature in the tank 14 is low, the heat responsive member bends to the extension pressure of the bias spring 30 and is compressed. However, when the water temperature reaches the thermoresponsive temperature,
The heat responsive member 29 extends and pushes up the rod 31 in the direction of arrow B. When the heat responsive member 29 is in the compressed state, the locking portion 28 of the hot water guide 26 is engaged with the hook 32 and locked at a position where the opening 27 of the hot water guide 26 faces the tank 14. It When the heat responsive member 29 extends, the hook
The engagement with 32 is released.

33 is a motor type time switch.
The motor 34, the contact Sa, the contact Sb, the contact S ₁ and the contact S ₂ are built in the 33, and the motor 34, the contact S ₁ and the contact S ₂ are connected in series and in parallel with the power supply. The contact Sa is connected to the heater 21, and the contact Sb is configured to connect or disconnect the power supply circuit to the drive motor 13, respectively, and are driven in connection with the timed operation or the switch operation described later, respectively. It Switch S ₃ is time switch 33
It is connected in parallel with the contact S ₂ built in, and is closed in connection with the operation of the heat responsive member 29 described above. In addition, one end is connected to the drive motor 34, which is connected to the contact Sb, and the contact S ₁ connection point.

Next, the operation of the above configuration will be described. First, the required amount of coffee beans is placed in the raw material crushing chamber 15, and the required amount of water is supplied to the tank 14. Next, when the time switch 33 is set to a predetermined time, the contacts Sb, S ₁ , S ₂ are closed _first , and the timed operation of the drive motor 13 and the time switch 33 starts. And when the set time has elapsed, coffee beans are crushed and filtered.
The discharge to 16 is completed, contacts Sb and S ₂ are closed, and contact Sb
When a is closed, the operation of the motor 34 and the drive motor 13 is stopped, and energization of the heater 21 is started.

When the heater 21 is energized, the water filled in the water pipe 20 is heated and eventually starts boiling locally. At this time, the water filled in the water pipe 20 is changed to the tank 14 by the boiling pressure.
Due to the presence of the check valve 19 on the
It spouts to the hot water supply switching device 18 through 23, and is separated into steam and hot water, and the hot water is dripped into the hot water guide 26 through the hot water outlet 24,
It is returned to the tank 14 again through the opening 27. When this operation is repeated continuously, the water temperature in the tank 14 gradually rises. Initially, the temperature of the hot water jetted from the outlet 23 is 80 to 90 ° C.
However, as the temperature of the water in the tank 14 rises, the temperature of the hot water ejected from the discharge port 23 also rises and eventually reaches a boiling state near 100 ° C. By setting the water temperature in the tank 14 at this time to the operating temperature of the heat responsive member 29, the heat responsive member 29 expands against the force of the bias spring 30 and moves the rod 31 upward.
As a result, the engagement between the hot water guide 26 and the hook 32 is released, so that the hot water guide 26 rotates and the opening 27 thereof moves to the filtration chamber 16 side. At this time, the switch S ₃ is pressed by the hot water guide 26 to be closed, and the time switch 33 starts the timed operation again. Further, the hot water heated to 100 ° C. from this time is dispersed by the hot water receiving portion 26 and dropped on the coffee powder, and the temperature in the filtration chamber 16 becomes 92 to 96 ° C.

Further, the time switch 33 is a contact for a fixed time from the time when a predetermined time has elapsed after the start of re-operation in the process of timed operation
After opening Sa, the contact Sa is closed again, and the contact S ₁ is opened to end the function. That is, for a predetermined time,
After the primary hot water is supplied, the heater 21 is de-energized to stop the hot water discharge for a certain period of time. During this time, the coffee powder is swelled and then the heater 21 is energized again to perform the secondary hot water supply.

After the secondary hot water supply is started, the hot water is supplied continuously and in a short time because the water in the tank 14 is preheated until the coffee extraction is completed.

As described above, according to the present invention, in the extraction of coffee, hot water at a temperature higher than the initial temperature of hot water is poured, and then unevenness is performed, so that the coffee powder can be sufficiently swelled. It is possible to improve the extraction efficiency of the high-quality soluble components contained in, and also improve the filterability, and as a result, ideal coffee extraction conditions, that is, boiling water to remove unnecessary components such as scaly water. Coffee is extracted at 92-96 ° C using 3 to 4 minutes, and the extraction is completed in 3-4 minutes, so it has a high aroma that cannot be obtained with a conventional electric coffee brewer and has the original taste of coffee. It has excellent effects such as obtaining high quality coffee.

[Brief description of drawings]

1 is a longitudinal sectional view of an electric coffee brewer showing an embodiment of the present invention, FIG. 2 is a circuit diagram of the same coffee brewer, and FIG. 3 is a partial sectional view of the same coffee brewer. FIG. 4 is a longitudinal sectional view of a hot water supply switching device in the coffee brewer, FIG. 5 is a perspective view of the coffee brewer, and FIG. 6 is a plan view of a crushing filtration container in the coffee brewer. 13 ... Drive motor, 14 ... Tank, 21 ... Heater, 16 ...
… Filtration chamber, 18 …… Hot water supply switching device, 29 …… Thermal response member, 33
...... Time switch.

Claims (1)

[Claims] 1. A motor-type time switch for controlling the operating time of a coffee bean crushing drive motor and the energization of a heater for introducing and heating water in a tank, and the water heated by the heater is circulated to the tank. A hot water supply switching device for switching between hot water supply and a hot water supply to a filtration chamber for extracting coffee; and a heat responsive member for operating the hot water supply switching device when the temperature of water in the tank reaches a predetermined temperature. Stops the operation of the drive motor and switches to energization of the heater, then temporarily stops and restarts the timed operation in association with the operation of the hot water supply switching device, and energizes the heater at a constant level after a lapse of a predetermined time. An electric coffee brewer configured to stop for hours.