JPS6334594Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a hot water supply control device for a coffee brewing device.

A coffee extraction device extracts the active ingredients of coffee by sprinkling hot water over coffee powder, but since the temperature of the water is an important factor in extracting these active ingredients, the water inside the coffee extraction device is controlled at an appropriate temperature. The appropriate temperature is now indicated using lamps, etc. Therefore, when brewing coffee, the coffee liquid is extracted by checking the appropriate temperature using a lamp or the like, and then inputting a brewing command by operating a brew push button switch or the like. The hot water storage tank inside the coffee brewing device is replenished with water as a result of coffee extraction, and water begins to boil to the appropriate temperature in preparation for the next coffee extraction. When there is a high demand for coffee, the most amount of coffee can be supplied by making the most of the water heating capacity of the coffee extraction device and starting the next extraction as soon as the temperature reaches the appropriate temperature. If you are next to the coffee brewing device and monitoring the appropriate temperature indicator lamp, you will need to start the brewing operation immediately when the lamp is displayed, which is inconvenient as it will take up a lot of manual labor, so you may need to move away from the coffee brewing device and use another device. If you are working on a job like this, you may neglect to monitor the lamp, and you may not be able to brew coffee right away even when the temperature reaches the appropriate temperature, or you may get busy with other tasks and forget to brew coffee, resulting in the coffee liquid There was a risk that the extraction capacity of the coffee extraction device could not be utilized to its fullest potential, resulting in a shortage of coffee supply, such as running out of stock and not being able to supply coffee.

The purpose of this invention is to eliminate such drawbacks, and its purpose is to prevent coffee from being extracted even if the water boiler in the coffee brewing device has not yet reached the appropriate temperature and is still heating water when brewing the next coffee immediately after brewing coffee once. When a command is received, this extraction command is memorized, and when the appropriate temperature is reached, coffee is automatically extracted at that point.
An object of the present invention is to provide a coffee extraction device that can make maximum use of its extraction capacity.

An embodiment of the present invention will be explained based on the drawings.
In Figure 1, a hot water storage tank 8 houses a heater 9.
A water supply pipe 10 with a water supply solenoid valve 11 interposed at the bottom of the
is connected, and this water supply pipe 10 is connected to a drinking water source such as tap water. One end of the siphon pipe 3 is suspended from the top of the hot water storage tank 8 to a required depth, and the other end is extended outside the hot water storage tank 8 so as to be slightly lower than this pipe end position, and hot water is uniformly distributed at the tip of the siphon pipe 3. A water sprinkler 2 for spraying water is attached. Below this water sprinkler 2 is a coffee filter 1 that accommodates coffee powder and filters coffee liquid.
is provided, and the extracted coffee is received in a coffee pot 12. A float cylinder 6 having a float switch 5 installed therein is provided so as to be higher than the upper surface of the hot water storage tank 8, and its bottom is communicated with the middle part of the hot water storage tank 8 through piping. Further, the upper part of the float cylinder 6 and the upper part of the hot water storage tank 8 are both connected to the air vent pipe 4 and communicated with the atmosphere. A temperature sensor 7 for detecting the temperature of hot water is provided in the hot water storage tank 8, and the detected hot water temperature information is sent to a hot water temperature determining device 15 in the control device. Furthermore, the control device includes a hot water supply command input device 13 for brewing coffee, a command storage device 14 for storing this command, and an execution command output device 16 for instructing execution of this command. These devices 13 to 15 are connected in series, and the execution command output device 16 controls the opening and closing of the hot water supply solenoid valve 11. The float switch 5 is designed to clear the stored contents of the command storage device 14 and stop the output of the execution command output device 16.

Next, the operation of this device will be explained with reference to FIG. 2 as well. First, when the water storage tank 8 is empty and the water filling switch PB ₂ is pressed, the relays R ₁ and R ₂ are energized and the respective contacts CR ₁ and CR ₂ are closed, and as a result, the relays R ₁ and R ₂ become self-holding. Water supply solenoid valve 1
1 coil WV is energized, water is supplied to the hot water storage tank 8 through the water supply pipe 10, the water level rises, water is supplied to the float cylinder 6 at the same water level, and water is supplied from the air vent pipe 4 to the hot water storage tank 8 and the float cylinder 6. The air goes out. When the hot water storage tank 8 is full, the water rises in the siphon pipe 3, and when it reaches level A at the top, the float switch 5 (FS in Figure 2) operates to energize the relays R ₁ and R ₂ . is disconnected and the respective contacts CR ₁ and CR ₂ open and the water supply solenoid valve coil WV
Electricity is cut off and the water supply is stopped. At this point, the water in the siphon pipe 3 exceeds its top and starts a siphon phenomenon, and water is sprinkled from the water sprinkler 2, and the water level in the hot water storage tank 8 falls to the level of the suction port of the siphon pipe 3. When the point B is reached, the siphon phenomenon is cut off, and the water sprinkling from the water sprinkler 2 ends. Hot water temperature determination device 1 that operates in cooperation with the temperature sensor 7
5 (TH in FIG. 2) is connected to the water heater contact X, and the heater 9 (H in FIG. 2) is energized to boil water. When the hot water temperature determining device 15 receiving the hot water temperature information from the temperature sensor 7 determines that the temperature is appropriate, the contact of the hot water temperature determining device TH is switched to the appropriate temperature contact Y, and the power supply to the heater H is cut off and water heating is stopped. At the same time, the appropriate temperature indicator lamp PL is energized and lights up to indicate the appropriate temperature.

To extract coffee, use the coffee filter 1
When a filter and an appropriate amount of coffee powder are set in the machine and the brewing command input device 13 (brewing push button switch PB ₁ in Fig. 2) is operated, the relay R ₁ corresponding to the command storage device 14 is energized and its contact CR ₁ is closed. Relay _R1 is self-held and the extraction command is memorized,
Since the hot water temperature determination device TH is connected to the appropriate temperature contact Y, when the contact CR ₁ closes, the execution command output device 1
Relay R ₂ corresponding to 6 is energized, and its contact CR ₂
is closed, the coil WV of the water supply solenoid valve 11 is energized, water starts being supplied to the bottom of the hot water storage tank 8, and the already boiling hot water is pushed up by the supplied water and when it reaches the hot water level A, the float switch 5 (second FS) in the figure opens and the relays R ₁ and R ₂ are de-energized, and the respective contacts CR ₁ and CR ₂ are opened. The energization to the coil WV of the water supply solenoid valve 11 is de-energized and the water supply is stopped. At the same time, hot water is siphoned The coffee powder in the coffee filter 1 is sprinkled from the sprinkler 2 through the pipe 3, and the coffee liquid is extracted and received in the coffee pot 12. Since water is supplied to the bottom of the hot water storage tank 8 for brewing coffee, the water temperature in the lower part of the hot water storage tank 8 decreases, and this is used as information from the temperature sensor 7 to be determined by the hot water temperature determination device 15 (TH). Switch the electric contact to the hot water contact X and turn on the heater 9 (H).
energizes, starts boiling water, and turns off the appropriate temperature indicator lamp. If the capacity of the heater 9 is too large, the generation of bubbles due to partial boiling from the surface of the heater 9 during boiling water will become more intense, making it difficult to control the water temperature, or causing an interruption of the siphon phenomenon, so generally the reboiling of the water is completed. The time is much later than the time when coffee extraction is completed.

When there is a high demand for coffee, immediately set new coffee powder in the coffee filter 1 for the next coffee extraction and operate the extraction push button switch PB ₁ again, the relay R ₁ will be energized and its _{contact CR 1 will} close. is self-maintained and the extraction command is stored.
When the hot water in the hot water storage tank 8 reaches the appropriate temperature, the hot water temperature determination device 15 (TH) switches the electric contact to the appropriate temperature contact Y, lights up the appropriate temperature display lamp PL, and energizes the relay R ₂ corresponding to the execution command output device 15. Close the contact CR ₂ and close the coil WV of the hot water supply solenoid valve 11.
Electricity is supplied to start water supply, and the command stored in the command storage device 14 is executed. Even if the hot water temperature determining device TH switches the electric contact to the hot water contact X due to a drop in the hot water temperature during water supply to the hot water storage tank 8, the water supply will continue because the relay _R2 is self-held by its contact _CR2 . Ru. When the float switch 5 (FS) detects the hot water level A and operates to turn off the power to the relays R ₁ and R ₂ , the self-holding of these relays R ₁ and R ₂ is released and the command storage device 15 is activated. At the same time as the stored contents are cleared, the output of the execution command output device 16 disappears, the water supply electromagnetic valve 11 is closed, and the water supply is stopped, and hot water is sprinkled on the coffee powder from the water sprinkler 2, thereby achieving the optimum extraction conditions. Delicious coffee is extracted at the right temperature. The hot water temperature determining device can also be provided separately from the device for controlling the energization of the water heater. Furthermore, since the water filling switch PB ₂ is not used for normal coffee brewing operations, it is preferable to install it on the back of the coffee brewing device to avoid erroneous operation. Furthermore, the input extraction command in memory can be canceled by once turning off a power switch (not shown) to the control system.

As described above, the coffee brewing device of the present invention allows a coffee brewing command to be input even while water is being boiled, and this brewing command is automatically executed when the water reaches an appropriate temperature to brew coffee. This makes it possible to make maximum use of the water heating capacity of the coffee brewing equipment during periods when the demand for coffee is high, making it possible to supply a large amount of coffee. However, there is no need to monitor the proper temperature of the coffee brewing device, and you can input the brewing command when your hands are free, saving you labor.Furthermore, when the water temperature is below the optimum temperature, you can easily make coffee. The present invention has the advantage that coffee is always extracted with water at an appropriate temperature without extraction, so the extraction conditions are always optimal and delicious coffee at an appropriate temperature can be obtained.

[Brief explanation of the drawing]

Each figure shows an embodiment of the present invention, and FIG. 1 is a mechanical diagram, and FIG. 2 is an electric circuit diagram. 1...Coffee filter, 2...Water sprinkler, 8...
Hot water storage tank, 9...Heater, 13...Hot water supply command input device, 14...Command storage device, 15...Hot water temperature determination device, 16...Execution command output device.

Claims (1)

[Scope of utility model registration request] In a coffee brewing device consisting of a hot water storage tank having a heating device, a hot water sprinkler installed at the end of a hot water outlet pipe from the hot water storage tank, and a coffee filter installed under the hot water sprinkler, coffee filtration is performed. a hot water supply command input device that instructs a water supply device to supply hot water; a command storage device that stores commands from the hot water supply command input device; a hot water temperature determination device that determines whether the hot water temperature in the hot water storage tank is appropriate; A coffee brewing device comprising: an execution command output device that receives an appropriate temperature detection output from a temperature determination device and operates to execute a command stored in the command storage device.