JPH05300838A - Coffee extractor - Google Patents

Abstract

PURPOSE:To reduce the noise at the time of grinding coffee beans, use a motor with smaller start torque, and eliminate the washing of a hopper or grinding chamber by a user to simplify the handling. CONSTITUTION:A grinding chamber 34 with a hopper 33 and cutter 35 being built in is arranged under a discharge pipe 32 which discharges hot water, and a timer switch 41 is provided which connects power with a motor 36 at a specified time after power is connected with the heating device. Then, coffee beans which are swollen and softened by hot water are ground to reduce the noise.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coffee extractor which is of a drip type and which is integrally provided with a mill for grinding coffee beans.

[0002]

2. Description of the Related Art Generally, a coffee extractor is mainly a so-called drip-type extractor in which coffee beans are ground by a mill, sent to an extraction chamber, and hot water is poured from there to extract coffee.

FIG. 4 shows a vertical sectional view of a conventional drip type coffee extractor with a mill of this type, and the construction and operation will be described below.

The main body 1 of the coffee extractor is a water tank 1a,
A crushing chamber 12 having a cutter 11, an extraction chamber 7, a glass container 9 below the extraction chamber 7 for storing coffee liquid, and a heating device 3 for keeping the coffee in the glass container 9 warm are provided.

The coffee beans 8 roasted and dried in the crushing chamber 12 are crushed by the cutter 11 and sent through the filter 13 into the extraction chamber 7 in which the paper filter 14 is set. The water in the water storage tank 1a is taken out from the bottom by the connecting pipe 16 via the check valve 2, is pushed upward by the water rising pipe 4 through the heating device 3, and is discharged to the extraction chamber lid 6 from the discharge pipe 5 to be extracted from the extraction chamber 7 The hot water is poured into the coffee powder 8A inside. The coffee liquid is extracted by the paper filter 14, flows down, and is stored in the glass container 9.

In the figure, 10 is a motor for rotating the cutter 11, 13 is a filter for filtering the ground coffee ground 8A, and 15 is an outer lid.

[0007]

In the above-mentioned conventional coffee extractor, since the roasted and dried coffee beans 8 are put into the crushing chamber 12 at one time and the cutter 11 is rotated, a loud noise is generated during crushing. A large load is applied to the motor 10 when the cutter 11 rotates, and the motor 10 must have a large starting force. The coffee powder 8A is attached to the wall of the crushing chamber 12, the cutter 11, the lid 6 of the brewing chamber 7, etc. Then, there is a problem that it takes time to clean after use.

The present invention has been made in consideration of the above conventional problems, and an object of the present invention is to provide a coffee extractor which produces less noise when coffee beans are ground and is easy to handle.

[0009]

In order to achieve the above object, the present invention has a coffee extraction chamber, a crushing chamber having a cutter for crushing coffee beans between discharge pipes having hot water discharge ports, and coffee beans. Is provided with a discharge port for the hot water discharge pipe on the upper part of the hopper. The motor is energized for a certain period of time after a certain period of time has passed.

A heat-responsive open / close valve is provided between the hopper and the crushing chamber to detect the discharge of hot water after the heating device is energized and drop the coffee beans in the hopper into the crushing chamber. Further, the motor is energized for a predetermined time in association with the operation of the heat-responsive on-off valve to crush the coffee beans.

[0011]

According to the present invention, hot water is poured into roasted coffee beans, the coffee beans are wetted and swelled and softened by the hot water, and then the coffee beans are successively dropped into the grinding chamber to be ground, so that noise is generated. The specification of a motor with few motor starting powers has become possible. Also, since hot water is discharged from the upper part of the hopper, the coffee powder adhering to the inside of the hopper, the wall of the grinding chamber, the cutter, etc. is washed away,
It is possible to provide a coffee extractor that saves the user's labor and is easy to handle.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a longitudinal sectional view of a coffee extractor according to an embodiment of the present invention. In FIG. 1, 31 is a coffee extractor main body for heating water in a water tank (not shown). (Not shown)
The configuration in which the hot water is discharged from the discharge port of the hot water discharge pipe 32 is the same as the conventional configuration, and the description thereof is omitted.

The main structure of the present embodiment is located at the opening position of the discharge pipe 32, and the extraction chamber 38 is located above the glass container 46 for storing the coffee liquid as shown in FIG. A crushing chamber 34 having a cutter 35 built therein is provided, a hopper 33 for charging roasted coffee beans is arranged above the crushing chamber 34, and a discharge pipe 32 is provided above the hopper 33. The rotary shaft of the motor 36 is fixed to the cutter 35.

Further, as shown in the energization time chart of the timer switch 41 shown in FIG. 2, the energization timing of the motor 36 for driving the cutter 35 is energized to the heating device simultaneously with the operation of the timer switch, and hot water starts to be discharged. After the time T1 when the roasted coffee beans are exposed to hot water has elapsed, the motor is energized for a time T2 required for grinding the coffee beans. After that, a timer switch configured to re-energize the motor for a short time T4 for the purpose of cleaning the cutter and the crushing chamber after an arbitrary time T3 has elapsed is provided.

Further, a heat-responsive open / close valve 43 is provided between the crushing chamber 34 and the hopper 33, and a heat-responsive movable body 43b is provided with a valve body 43a as shown in the perspective view of FIG. It constitutes the valve 43. The valve body 43a is provided with a small hole 43c through which hot water passes.

Next, the operation will be described. Hot water is poured into the coffee beans 8 in the hopper 33 to swell and soften the coffee beans, and then the coffee beans fall into the grinding chamber 34 and are ground by the rotation of the cutter 35.
Hot water is continuously or intermittently poured during crushing. The hot water and the ground coffee powder 39 pass through the filter 37 and fall on the paper filter 40 set in the extraction chamber 38 to extract the coffee.

Further, the motor is interlocked with the heat-responsive on-off valve 43.
A switch knob 42 of the timer switch 41 for controlling the energization of 36 can be attached. Here, the thermoresponsive on-off valve 43
The operation rod 43d provided on the heat responding body 43b operates the movable contact plate 44 to open and close the fixed contact plate 45 with the contact point 44a, and the coffee beans in the hopper 33 are heated. Simultaneously with the operation of the heat-responsive open / close valve 43 which heat-acts after being poured, the motor 36 is energized, and the coffee beans swelled and softened by the hot water are crushed.

[0018]

As described above, in the coffee extractor of the present invention, the hot water is discharged from the upper part of the hopper to swell and soften the coffee beans in the hopper and then the crushing is performed, so that the noise during the crushing is reduced. Therefore, it becomes possible to use a motor with a small starting force. Further, the coffee powder adhering to the inside of the hopper, the cutter, the wall of the crushing chamber, etc. can be washed away and always kept in a clean state, which saves the user the trouble of washing. Furthermore, since the coffee beans are swelled and softened and then ground with hot water, the extraction efficiency of the coffee component is dramatically improved.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of essential parts of a coffee extractor according to an embodiment of the present invention.

FIG. 2 is an energization time chart of the time switch of FIG.

FIG. 3 is a perspective view of the thermoresponsive on-off valve of FIG.

FIG. 4 is a vertical cross-sectional view of a conventional coffee extractor.

[Explanation of symbols]

8 ... Coffee beans, 31 ... Coffee extractor body, 32 ... Discharge pipe, 33 ... Hopper, 34 ... Grinding chamber, 35 ... Cutter,
36 ... motor, 37 ... filter, 38 ... extraction chamber,
39 ... Coffee powder, 41 ... Timer switch, 42 ... Switch knob, 43 ... Thermal open / close valve, 46 ... Glass container.

Claims (4)

[Claims] 1. A water tank provided in the main body, an extraction chamber for extracting coffee, a water rising pipe led out from the bottom of a water tank via a check valve, and heating water flowing to the water rising pipe. A heating device, a discharge pipe communicating with the water rising pipe and having a discharge port for hot water in the upper part of a hopper, and a glass container for storing coffee liquid in the lower part of the extraction chamber are provided, and coffee is provided between the extraction chamber and the discharge pipe. A coffee extractor comprising a crushing chamber having a cutter for crushing beans and a hopper for storing coffee beans. 2. A timer switch for energizing a motor for driving a heating device and a cutter arranged in a coffee crushing chamber energizes the heating device at the same time as the operation starts, and energizes the motor for a certain period of time after a certain period of time has elapsed. The coffee extractor according to claim 1, wherein: 3. A heat-responsive open / close valve is provided between a hopper for storing coffee beans and a crushing chamber.
The coffee extractor described. 4. The coffee brewing machine according to claim 2, wherein the motor is energized for a predetermined period of time after the heating device is energized and in conjunction with the thermally responsive on-off valve.