JPS63105719A - Coffee brewer - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a coffee brewer that automatically grinds coffee beans and extracts coffee liquid in succession.

BACKGROUND OF THE INVENTION In general, this type of coffee boiler has a configuration in which hot water is supplied from the top of a hopper equipped with a crushing member for crushing coffee beans, as described in Japanese Utility Model Application No. 59-10734.
No. Publication is known. That is, in FIG. 6, 1 is a main body, and a motor 2 is provided on the upper part of the main body 1 with a rotating shaft 3 disposed below. A blade-shaped crushing member 4 for crushing coffee beans was attached to the end of the rotating shaft 3. The grinding member 4 was installed inside a hopper 5 for storing coffee beans, and a basket 6 was provided below the hopper 5, and a container 7 was further provided below the basket 6. A heating pipe 1o is connected to the bottom of the water tank 8 via a check valve 9, and the heating pipe 10 is integrally formed with a heater (not shown) and aluminum die-casting.
The heating pipe 10 was connected to a rising pipe 12, and the tip of the rising pipe 12 opened at the top of the hopper 6.

In the above configuration, when extracting coffee liquid,
By rotating the motor 2, the crushing member 4
The coffee powder made by crushing the coffee beans is stored in the basket 6, and then the heating element 11 is energized to heat the water in the water tank 8, and hot water is supplied from the rising pipe 12 to the hopper 5, thereby producing liquid coffee. Extract. While hot water is being supplied from the rising pipe 12 to the hopper 5, the motor 2 rotates to rotate the crushing member 4.

In addition, in a coffee boiler, a structure in which the motor and heating element are linked with a timer is disclosed in Japanese Patent Application Laid-Open No. 61-109622.
No. 4,007,302 is known, and in this device, when electricity is started after setting a timer to a predetermined time, the motor is activated and coffee beans are ground. After all the coffee beans have been ground, the motor is stopped and power is switched to the heating element.

Furthermore, as a configuration for controlling the supply of electricity to the heating element using a water temperature sensor such as a thermostat, Japanese Patent Laid-Open No. 59-2093
Publication No. 18 is known, in which a water temperature sensor is disposed in contact with the bottom of a water tank, and when the water temperature sensor detects a temperature near the boiling point of water, heating is started. It was designed to cut off electricity to the body.

Problems to be Solved by the Invention However, in the conventional configuration described above, hot water is supplied from the upper part of the hopper 6 and at the same time the motor 2 is driven to rotate, so that the hot water supplied into the hopper 5 is stirred by the crushing member 4, and the hot water is In the case of removing the coffee powder remaining in the 59-10734 publication, the configuration for driving the motor 2 to rotate in response to hot water supply is not disclosed, and the The Japanese Patent Publication No. 209318 also does not disclose a configuration for controlling the drive of a motor using a water temperature sensor. Furthermore, if a water temperature sensor is attached to the bottom of the water tank and the motor is controlled, the amount of water supplied to the water tank cannot be constant, so the water temperature sensor will activate when a predetermined temperature is detected in the water tank. There are many variations in time until the hot water is supplied, and as a result, it has been difficult to control the rotational drive of the motor in accordance with the amount of hot water supplied.

The present invention solves the above-mentioned conventional problems, and when hot water with a temperature higher than a predetermined temperature is supplied from the water supply pipe of the water heater, the crushing member is rotated by the rotation of the motor, so that the crushing member inside the crushing chamber is rotated. It is an object of the present invention to provide a coffee boiler that can remove residual coffee powder and improve the cleaning effect.

Means for Solving the Problems In order to achieve the above objects, the coffee boiler of the present invention has the following features:
A hopper for storing coffee beans, a grinding chamber rotatably holding a grinding member for grinding the coffee beans supplied from the hopper, a motor for rotationally driving the grinding member, and coffee powder produced in the grinding chamber. and a hot water supply device, for supplying hot water in a hot water pipe constituting the hot water supply device into the hopper,
The temperature rise in the hot water supply pipe due to the hot water is detected, and the motor is driven to rotate when hot water is supplied.

Effect With the above configuration, when the hot water pipe is heated to a predetermined temperature or higher by hot water flowing through the hot water pipe, the thermistor is activated and drives the motor to rotate, so even if the amount of water supplied to the water tank is different, The motor can be rotated while hot water is being supplied, and the crushing member can be rotated while the required amount of hot water is being supplied to the hopper and the crushing chamber. The cleaning effect of the room can be enhanced.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 4.

In the figure, 13 is a main body, and a motor 16 with a rotating shaft 14 arranged horizontally is provided on the upper part of the main body 13.
Further, a blade-shaped crushing member 18 is attached to the rotating shaft 14. Further, the rotating shaft 14 rotatably extends into the crushing chamber 17, and the crushing member 16 is installed inside the crushing chamber 17.

A hopper 18 for storing coffee beans is provided above the grinding chamber 17. This hopper 18 is formed into a substantially conical shape, and a hopper lid 19 is detachably attached to its upper opening. Further, a steam hole 20 is formed in the hopper lid 1e.

A coffee bean inlet 21 is opened at the bottom of the hopper 18 in the axial direction of the rotating shaft 14, and the hopper 18 and the grinding chamber 17 are connected to each other.
It communicates with At the bottom of the crushing chamber 17, an air outlet 22 consisting of a plurality of small holes is formed. The grinding chamber 1
A basket 23 located below the grinding chamber 17 for storing the coffee powder produced in the grinding chamber 17 is removably provided on the main body 13.
4 is installed internally. The basket 23 is formed into a substantially conical shape, and an extraction port 26 is formed at the bottom of the basket 23 for dripping coffee liquid extracted by hot water supply. In addition, a basket lid 26 is provided at the upper opening of the basket 23.
is detachably attached, and an opening 27 corresponding to the outlet 22 is provided in the center thereof, and the coffee powder supplied from the outlet 22 is placed outside the basket 23 at the periphery of the opening 27. An extension body 28 is formed to prevent coffee powder from scattering, and a lip body 29 is provided on the back surface of the basket lid 26 to prevent coffee powder from scattering outside the basket 23. basket 23
A container 3o for storing the coffee liquid extracted in the basket 23 is provided below. A water tank 31 is provided on the side of the basket 23 and the container 30, and a water supply port 32 is formed at the bottom of the tank 31. And this water supply port 3
2 is connected to a heating pipe 33 via a check valve, and this heating pipe 33 integrally constitutes a heating body 34 by a heater (not shown) and aluminum die-casting. The heating pipe 33 is connected to the circulation pipe 36 via the waterway switching valve 36.
The other end of the circulation pipe 36 is connected to the water tank 31. The water channel switching valve 36 is connected to a hot water supply pipe 37, and a discharge port 38 at the tip of the hot water supply pipe 37 is opened at the upper side surface of the hopper 18.

The waterway switching valve 36 is linked with the motor 16 and the control unit 39, and connects the water tank 31 to the heating pipe 33°, the waterway through which hot water is supplied to the water tank 31 again via the circulation pipe 36, and the waterway from the water tank 31 to the heating pipe 33° for hot water supply. This is for switching the waterway through which hot water is supplied to the hopper 18 from the discharge port 38 via the pipe 37. A negative characteristic thermistor 41 such as a glass-encapsulated type having a tube-shaped coating 40 having insulation properties and good thermal conductivity is attached to the hot water supply pipe 37, and this negative characteristic thermistor 41 is electrically connected to the control unit 39. has been done. The heating pipe 33. Circulation pipe 3
6. Hot water pipe 37. Hot water supply device 42 by heating body 34 etc.
It consists of

The operation of the above configuration will now be described.

First, a required amount of coffee beans is stored in the hopper 18, and a required amount of water is supplied to the water tank 31. Hopper 1
The coffee beans stored in 8 are sent to the grinding chamber 1 from the entrance 21.
A portion is stored in 7. When the power is turned on and the control unit 39 is operated, the motor 16 is driven to rotate the grinding member 16 to grind coffee beans. As the grinding of the coffee beans in the grinding chamber 17 progresses, coffee beans are sequentially supplied from the hopper 18. The ground coffee powder is stored in a filter 24 in a basket 23 from an outlet 22. When all the coffee beans have been ground, the control section 39 is activated to stop the motor 16 and to activate the heating element 34. The cloudy water is heated from the heating pipe 33 through the circulation pipe 36 and back to the water tank 34 through the water channel. 3. When the water temperature of the water you love reaches a predetermined temperature or higher, the control unit 39 operates again to operate the water channel switching valve 36, passing from the heating pipe 33 to the hot water supply pipe 37 to the discharge port 38.
The system switches to the waterway that supplies hot water. The water level in the hot water pipe 37 gradually rises, and the water level in the hot water pipe 37 gradually rises.
7 (thereby, the temperature of the hot water supply pipe 37 rises).

When the hot water in the hot water supply pipe 37 is at a predetermined temperature or higher and the negative characteristic thermistor 41 detects the temperature of the outer peripheral surface of the hot water supply pipe 37 corresponding to the water temperature, the control unit 39 is activated by the output signal of the negative characteristic thermistor 41, The motor 16 is driven to rotate. At this time, the hot water supply pipe 37 is almost filled with hot water in order to keep the temperature of the outer peripheral surface of the hot water supply pipe 37 above a predetermined temperature. A stable amount of hot water is supplied to the hopper 18 from the hot water supply pipe 37, and the hot water supplied to the grinding chamber 17 from the outlet 38 of the d hopper 18, which rotates the motor 16, via the coffee bean inlet 21, is ground. Water is sprayed by the member 16 mainly in the circumferential direction of the rotation of the grinding member 160, and hot water is supplied from the outlet 22 to the basket 23 while removing coffee powder adhering to the inner wall surface of the grinding chamber 17.

Then, by supplying hot water to the coffee liquid in the basket 23, the coffee liquid is extracted, and the coffee liquid is extracted from the extraction port 26.
It is dripped from the container 30 and stored in the container 30.

Therefore, according to this embodiment, hot water of a predetermined temperature or higher is supplied to the hot water supply pipe 37, and when the hot water supply pipe 37 reaches a predetermined temperature or higher, the output signal of the negative characteristic thermistor 41 drives the motor 15 to rotate. 37
This makes it possible to rotate the motor 16 in a state where hot water is being stably supplied from the grinding chamber 17, and to drive the crushing member 16 to rotate while a sufficient amount of hot water is being supplied to the crushing chamber 17. The coffee powder adhering to the inner wall surface of the grinding chamber 17 can be removed by sufficient water sprinkling.

Although this embodiment has been described using a glass-encapsulated thermistor as the negative characteristic thermistor 41, the same effects as in this embodiment can be obtained even if a thermistor temperature sensor is used. Further, a positive characteristic thermistor may be used instead of a negative characteristic thermistor.

Effects of the Invention As is clear from the description of the present embodiment above, according to the present invention, a thermistor is attached to the hot water pipe that supplies hot water in a water heater, and the thermistor detects the temperature rise due to hot water supply in the hot water pipe, and the temperature rise of the motor is detected by the thermistor. Since it is configured to control the rotational drive, the motor is activated when it detects that the temperature of the hot water pipe has exceeded a predetermined temperature, that is, that hot water at a temperature higher than the predetermined temperature is stably supplied to the hot water pipe. As a result, the crushing member can be rotated while hot water is stably supplied to the crushing chamber from the hot water supply pipe via the hopper, allowing a sufficient amount of water to be crushed into the crushing chamber. Water can be sprinkled by the member, and therefore coffee powder adhering to the inner wall of the grinding chamber can be reliably removed, and
The grinding chamber and the grinding members can also be cleaned, and as a result, the device does not need to be cleaned after use, thereby improving its usability.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway vertical cross-sectional view of a coffee boiler showing an embodiment of the present invention, and FIG. 2 is a cross-sectional view of the same coffee boiler.
FIG. 3 is a longitudinal cross-sectional view of a main part of the same coffee boiler, FIG. 4 is a perspective view of the same coffee boiler, and FIG. 6 is a longitudinal cross-sectional view of a conventional coffee boiler. 15...Motor, 16...Crushing member,
17...Crushing chamber, 18...Hopper,
23...Basket, 31...Water tank, 34-...Heating body, 37...Hot water supply pipe, 41...Negative characteristic thermistor. Name of agent ★ Patent attorney Toshio Nakao and other names jS
--- Motai 8-11 ``11.! Gu-'' Figure 2 31-11 tree tank 34-11 rice Figure 3 Figure 4 Wow Figure 5

Claims (1)

[Claims] A hopper for storing coffee beans, a grinding chamber rotatably equipped with a grinding member for grinding the coffee beans supplied from the hopper, a motor for rotationally driving the grinding member, and coffee made in the grinding chamber. A basket for storing powder and a hot water supply device, supplying hot water in a hot water pipe constituting the hot water supply device into the hopper,
A coffee boiler in which a thermistor is attached to the outer circumferential surface near the tip of the hot water pipe, and the thermistor detects a temperature rise in the hot water pipe due to hot water filled in the hot water pipe, and drives the motor to rotate during hot water supply. vessel.