JP3237945U - Electric coffee maker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric coffee maker in which a flow path of a drip process and a flow path of a hot water process are configured to uniformly supply hot water even if the size of the powder surface and the depth of the powder differ depending on the amount of coffee powder. .. SOLUTION: A step 38 is provided on the bottom surface of a buffer for supplying hot water to coffee powder to raise the outer circumference, and the outermost hot water supply port entrance 39 is provided on the higher step. A small amount of hot water is supplied from the outermost hot water supply port 29, and a large amount of hot water is supplied from the hot water supply holes other than the outermost surface. can. [Selection diagram] FIG. 6

Description

The present invention is an electric coffee maker capable of brewing delicious coffee by providing a drip process flow path and a footbath process flow path and controlling the drip amount and the footbath amount.

When extracting coffee, the coffee concentration varies depending on the amount of coffee powder. You can adjust the amount of coffee powder to brew coffee of your favorite concentration. However, the depth and surface size of the coffee powder in the dripper depends on the amount of coffee powder.

As the coffee powder in the dripper gets closer to the outer circumference, the depth of the coffee powder becomes shallower, so it is possible to supply less hot water on the outer circumference and more hot water in the center to evenly supply the coffee powder. is important. Therefore, we devise a buffer that uniformly supplies hot water to the coffee powder regardless of the amount of coffee powder.

In order to brew one cup of coffee, the amount of water for one cup is supplied to the boiler by an electric pump to boil water, and then some hot water is steamed, some hot water is used for the drip process, and the rest. Add hot water and use it for the hot water process to brew coffee. Make sure there is no residual hot water left in the boiler when the entire process is completed.

A drip process flow path for supplying hot water to the dripper and a flow path for the additional hot water supply process for directly supplying hot water to the coffee cup are provided, and a solenoid valve is arranged in each flow path to control the opening / closing time of the solenoid valve to control the drip process. Perform the addition bath process and brew a cup of coffee.

The amount of coffee in one cup is the sum of the amount of drip and the amount of hot water added, and the selected drip rate of the body is set within the range of 30 to 70%. At this time, the amount of additional hot water is 70 to 30% of the amount of coffee in one cup.

Since the surface size of the coffee powder in the dripper varies depending on the amount of coffee powder, the hot water supply port of the buffer is arranged in a wide range. In addition, the depth of coffee powder is shallow near the outer periphery and deep near the center.

Therefore, in order to uniformly supply hot water to the coffee powder regardless of the amount of coffee powder, a step is provided on the bottom surface of the buffer to raise the outer circumference, and the outermost hot water supply port entrance is provided on a higher step. Alternatively, a part of the hot water supply port entrance on the outermost circumference is provided on a high step.

As a method of providing the outermost hot water supply port entrance at a high position, it is also possible to raise only the circumference of the outermost hot water supply port entrance. It is also possible to raise some of the hot water inlet entrances without raising all the hot water inlet entrances on the outermost circumference.

With this idea, the hot water supplied to the coffee powder of the dripper is supplied in a small amount from the outermost hot water supply port and a large amount from the hot water supply holes other than the outermost surface, and is uniformly supplied to the shallow and deep parts of the coffee powder. Since hot water is supplied, coffee is extracted without waste and delicious coffee can be made.

Describe the meanings of the following terms used here.
・ "Drip" is to extract coffee by supplying hot water to coffee powder.
-The "drip amount" is the amount of hot water supplied to the coffee powder to extract coffee. Here, "hot water supply amount" is also used interchangeably.
・ "Additional hot water" is to supply only hot water directly to the coffee cup. ・ "Additional hot water amount" is the amount of hot water to be directly supplied to the coffee cup.
-"The amount of water for one cup" is the amount of water required to brew one cup of coffee, and is the total amount of coffee and the amount of hot water absorbed by the coffee powder.
・ "A cup of coffee" is the total of the amount of drip and the amount of hot water added. Here, "1 cup of coffee" or "amount of coffee" is also used interchangeably.
-The "drip rate" is "drip rate = drip amount ÷ coffee amount".
-The "steaming process" is a process in which about 20 to 40 mL of hot water is supplied to the coffee powder before the drip process and held for 10 to 60 seconds to allow the coffee powder to absorb water.

FIG. 1 is an example showing a basic configuration of the present invention, and FIG. 8 is an example of an operation panel 2. The body 1 includes a power switch 3, a selection switch 4, and a start switch 5. The selection switch 4 can select the drip rate of the amount of coffee in the range of 30 to 70%. In addition, 100% drip without adding hot water can be selected.

There is a removable water tank 6 at the rear of the body, and the coffee cup 7 can be placed on the cup receiver 37 at the lower front. The dripper receiver 8 is removable, and the dripper receiver 8 can be removed and the dripper 9 can be set. The dripper 9 sets the paper filter 10 and puts the coffee powder 11.

The water tank 6 and the boiler 12 are connected to each other by a water supply pipe 14 via an electric pump 13. The boiler 12, the dripper 9, and the coffee cup 7 are arranged vertically from the top to the bottom in order to allow hot water to fall naturally.

A solenoid valve A15 and a buffer 35 are arranged between the boiler 12 and the dripper 9, and are connected by a hot water supply pipe 27 to form a flow path for a drip stroke. Further, an electromagnetic valve B16 is arranged between the boiler 12 and the coffee cup 7 and connected by a hot water pipe 28 to form a flow path for the hot water process. By controlling the operation timing and operation time of the solenoid valve A15, hot water can be supplied in the drip process. By controlling the operation timing and operation time of the solenoid valve B16, hot water can be supplied in the hot water supply process.

2 and 3 show the components of the boiler 12. The boiler 12 is composed of a boiler container 17, a container lid 18, and a heater 19, and includes a temperature sensor 20, a thermostat 21, and a temperature fuse 22. Further, the container lid 18 is provided with a water supply hole 23 and an exhaust hole 24, and a hot water supply hole 25 and a hot water supply hole 26 are provided at the bottom of the boiler container 17.

Hereinafter, an example of the process of brewing coffee will be described. Here, the case where the minimum amount of 30% is selected with the amount of coffee being 130 mL and the amount of steaming water being 20 mL will be described. Press the power switch 3 to turn on the power, and press the selection switch 4 to select a drip rate of 30%.

Next, when the start switch 5 is pressed, the electric pump 13 operates to supply water for one cup "150 mL = 130 mL + 20 mL" to the boiler 12, and the heater 19 turns on to start the boiling process. When the hot water in the boiler 12 reaches 90 to 100 ° C., the temperature sensor 20 detects it and the heater 19 is turned off.

Next, in the steaming process, the solenoid valve A15 is "opened", and about 20 mL of hot water is supplied from the hot water supply port 29 to the coffee powder 11 of the dripper 9. After that, the solenoid valve A15 is "closed", and the coffee powder 11 absorbs water for about 30 seconds and is steamed.

After that, the drip process is started, the solenoid valve A15 is opened again, hot water is supplied to the dripper 9, and coffee is extracted from the drip mouth 36 to the coffee cup 7. At this time, since the drip rate of 30% is selected, the drip amount is "39 mL = 130 mL × 0.3". The drip amount of 39 mL is divided into "20 mL + 19 mL" twice and hot water is supplied. During each hot water supply, the hot water supply is stopped for about 10 seconds.

It is possible to supply hot water with the selected drip amount at one time, but if the amount of hot water supplied at one time is large, there is a problem that hot water overflows from the dripper 9. Since the drip rate of the body 1 is set to 30 to 100%, the maximum drip amount is 130 mL, and if hot water is supplied at one time, the dripper 9 will overflow. Therefore, the maximum amount of hot water supplied at one time of the device is set to be equal to or less than the minimum amount of hot water supplied by the drip rate of the device.

Next, the hot water process is entered, the solenoid valve B16 is "opened", and only hot water is directly supplied to the coffee cup 7 from the hot water spout 30 to brew one cup of coffee. At this time, the amount of additional hot water is "91 mL = 130 mL-39 mL". The solenoid valve B16 is "open" until the hot water in the boiler 12 runs out, and when the hot water in the boiler 12 runs out, the solenoid valve B16 is closed to complete the process of brewing coffee.

FIG. 4 shows a hot water supply port 29 provided on the bottom surface of the buffer 35. FIG. 5 shows the surface of the coffee powder 11 and the hot water supply port 29 superimposed. The hot water supply port 29 is provided with small holes in a wide range so that hot water can be supplied to a wide range of the coffee powder 11.

Since the hot water supply area is large as described above, when the amount of hot water supply is small, there is a problem that hot water does not reach all the hot water supply ports 29, and it is not possible to uniformly supply hot water to the coffee powder. The minimum amount of hot water supplied at one time should be 10 mL or more so that such a problem does not occur.

Further, as shown in FIG. 5, since the depth of the coffee powder 11 in the dripper 9 becomes shallower as it gets closer to the outer periphery, the hot water supply in the outer peripheral portion should be reduced and the hot water supply in the central portion should be increased. Is required. As shown in FIG. 6, a step 38 is provided on the bottom surface of the buffer 35 to raise the outer circumference, and the outermost hot water supply port entrance 39 is provided on the higher step. Alternatively, it is also possible to provide a part of the hot water supply port entrances 39 on a high step without providing all the hot water supply port entrances 39 on the outermost circumference on a high step.

Further, as a method of providing the outermost hot water supply port entrance 39 at a high position as shown in FIG. 7, it is also possible to raise only the circumference of the outermost hot water supply port entrance 39. It is also possible to raise some of the hot water supply port entrances 39 without raising all the hot water supply port entrances 39 on the outermost circumference.

The hot water supplied to the coffee powder 11 is a small amount of hot water supplied from the outermost hot water supply port 29, and a large amount of hot water is supplied from the hot water supply holes 29 other than the outermost surface, and the hot water is uniformly supplied to the shallow part and the deep part of the coffee powder 11. Therefore, coffee is extracted without waste and delicious coffee can be made.

Since the drip rate set for the body 1 is 30 to 100%, the drip amount is 39 to 130 mL. Therefore, as for the drip amount, the hot water supply amount between the above-mentioned "maximum hot water supply amount at one time" and "minimum hot water supply amount at one time" is supplied a plurality of times to perform drip.

In this way, the coffee brewing process is performed by controlling the operation timing and operation time of the electric pump 13, the solenoid valve A15, and the solenoid valve B16 by the program of the control circuit 33, which is an electric coffee maker.

The basic components of the present invention are shown. It is a top view of a boiler. It is a vertical sectional view of a boiler. (AA cross section of FIG. 2) The arrangement of the hot water supply port of the buffer is shown. Shows dripper, paper filter and coffee powder. The arrangement of the hot water supply port is projected on the coffee powder. It is an enlarged view of the bottom surface part of a buffer, and is the drawing which shows that the step was provided on the bottom surface. It is an enlarged view of the bottom surface part of a buffer, and is the drawing which shows that the step was made only around the entrance of a hot water supply port. This is an example of an operation panel.

1 Instrument 2 Operation panel 3 Power switch 4 Selection switch 5 Start switch 6 Water tank 7 Coffee cup 8 Dripper receiver 9 Dripper 10 Paper filter 11 Coffee powder 12 Boiler 13 Electric pump 14 Water supply pipe 15 Solenoid valve A 16 Solenoid valve B
17 Boiler container 18 Container lid 19 Heater 20 Temperature sensor 21 Thermostat 22 Temperature fuse 23 Water supply hole 24 Exhaust hole 25 Hot water supply hole 26 Water heater hole 27 Hot water supply pipe 28 Water heater pipe 29 Hot water supply port 30 Water heater port 31 Exhaust port 32 Exhaust pipe 33 Control Circuit 34 Check valve 35 Buffer 36 Drip port 37 Cup receiver 38 Step 39 Hot water supply port entrance

Claims (2)

A flow path for the drip process for supplying hot water to the dripper and a flow path for the additional hot water supply process for directly supplying hot water to the coffee cup are provided, and solenoid valves A and B are arranged in each flow path to control the opening / closing time of the solenoid valve. In the configuration where one cup of coffee is brewed by executing the drip process and the adding hot water process, a step is provided on the bottom surface of the buffer that supplies hot water to the coffee powder, and the outermost hot water supply port entrance is provided on a high step. An electric coffee maker with a buffer. In the configuration of claim 1, an electric coffee maker having a buffer having a raised circumference of all or a part of the hot water supply port entrance on the outermost periphery of the buffer.

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