JPS6247321A - Quantitative hot water feeder of infusion apparatus of coffee - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention obtains a leached liquid by pouring boiling water into a material to be leached, such as coffee powder, which is used in households, businesses, or vending machines. The present invention relates to a quantitative hot water supply device for brewing coffee, etc., as described above.

BACKGROUND OF THE INVENTION Generally speaking, it is considered ideal for coffee to be infused at high temperatures for a short period of time, and evenly throughout the coffee.

Therefore, conventionally, in this type of brewing device, there is a brewing device for brewing coffee, etc. that uses a high-pressure type electromagnetic pump to pressurize to about g Kgf/Crj and brew coffee in a short time.By the way, this type of electromagnetic type Due to the characteristics of pumps, when the resistance of the flow path increases, the amount of water conveyed decreases rapidly, and when the resistance of the broken flow path decreases, the amount of water conveyed increases dramatically. For this reason, the amount of water conveyed varies depending on the amount and type of leached material, which is a flow path resistance, and there has been a demand for a device that can always convey a constant amount of water with a simple configuration.

For this reason, conventional brewing devices for coffee, etc.
For example, when brewing coffee, the machine is equipped with a dedicated coffee grinder to keep the coarseness of the coffee powder extremely constant, and the amount of coffee powder can be kept extremely constant. In order to minimize the source of variations in the brewing pressure caused by coffee brewing, the operation time of the water pump was controlled to reduce variations in the amount of coffee infused liquid.

Problem to be Solved by the Invention However, with such conventional configurations, sufficient maintenance of the coffee grinder is required to obtain a satisfactory amount of infusion, and it is also difficult to accurately measure the amount of leached material each time. It was necessary to measure the product, which was very time-consuming.

Therefore, the brewing pressure of coffee should be set to 3~aKtif〆ml.
Some systems have been used in which the pressure is lowered to a moderate level to reduce changes in the amount of water supplied due to pressure variations, but at moderate pressures, it is not possible to infuse the ideal coffee as described above.

The present invention solves these problems, and aims to provide a metered water supply device for brewing coffee, etc., which has a simple structure, is easy to use, and can supply a constant amount of water.

Means for Solving the Problems In order to solve the above problems, the present invention includes a water tank, a top surface is disposed on the bottom surface of the water tank, and the water tank communicates with the vicinity of the bottom surface of the water tank through a water supply valve. a metering tank with one side opened above the highest water level of the water tank,
and a ventilation pipe with the other end communicating with the measuring tank, and a pipe with one end opening near the bottom of the measuring tank and the other end opening into the material to be leached via a water conveying device that conveys water from the measuring tank. A waterway, a water heating unit incorporating a part of this waterway and equipped with a heating element, and the water supply valve are closed at the same time as and before the start of operation of the water supply device,
and an opening/closing means that opens at the same time as or after the completion of the operation of the water supply device, a water level detection section that is housed inside the metering tank and can move the detected water level up and down, and an adjustment knob provided on the outside of the main body. It is equipped with an adjustment device that operates the water level detection section.

Operation According to this configuration, water flows from the water tank through the water supply valve into the metering tank, and the metering tank is filled with water. When the water supply device is operated after the water supply valve is closed by the opening/closing means, the water level in the metering tank is lowered, and at a constant water level, the water level detection section is activated and the water supply device is stopped. The water supplied by the water supply device is turned into hot water by a water heating unit and is supplied to the material to be leached. That is, a constant amount of hot water is always supplied to the material to be leached. Furthermore, by rotating the adjustment knob on the adjustment device and moving the water level detection unit up and down, the detection water level at which the water level detection unit operates can be varied, making it possible to adjust the water supply amount to any desired level. It is capable of supplying any given amount of hot water.

Example Hereinafter, one embodiment of the present invention will be described based on the drawings.

In the figure, reference numeral 1 denotes a water heating unit, which is equipped with a cylindrical heater 3 as a heating element approximately in the center of a heater block 2, and a water pipe having a spiral water channel 4 around the outer periphery of the heater 3. 5 is provided. A holder 6 is rotatably provided at the bottom of the water heating unit 1 and has a handle (not shown). Reference numeral 7 denotes a guide link provided below the water heating unit 1, and this guide ring 7 holds coffee powder 8, which is a material to be leached.
A nozzle 12 having a nozzle hole 11 communicating with the water channel 4 is provided at the inner upper part of the storage part 10 that tightly stores the capsule 9 containing the water.

Reference numeral 13 denotes a set seat that can be raised and lowered by a support shaft (not shown).A capsule seat 15 is provided approximately in the center of the set seat 13, and a capsule seat 15 is provided with a discharge port 14 in the center. A hook piece 16 that engages with the holder 6 is provided. Storage portion 1Q of the guide link 7 and capsule seat 15
Store capsule 9 airtightly.

17 is a water tank, and below this water tank 17 is provided a measuring tank 19 whose top surface is a part of the bottom surface 18 of this water tank 17. 20 is a water supply valve, and this water supply pulp 20 is equipped with a valve shaft 21, a diaphragm 22, and a return spring 23, and has a cam 24 that constitutes an opening/closing means below the valve shaft 21, and a cam that interlocks with the holder 6. The rotation of the shaft 25 opens and closes the space between the water tank 17 and the measuring tank 19.

Reference numeral 26 denotes a ventilation pipe, and the upper part of this ventilation pipe 26 opens above the highest water level of the water tank 1γ, and the lower part is sealed with an O-ring 27 and opens only into the measuring tank 19.

28 is a float switch constituting a water level detection section installed on the bottom of the measuring tank 19, and the support 29 has a first reed switch 30 and a second reed switch 31 from above.
It is made to correspond to the float 32 which has a magnet inside, and it is possible to detect two levels of water level.

Reference numeral 33 denotes a connecting shaft whose one end is integrally attached to the lower part of the float switch 28 and has a male thread at the other end. It is screwed onto a female thread provided at the center of an adjustment knob 35 which is rotatably provided. The connecting shaft 33, the back plate 34, and the adjusting knob 36 constitute an adjusting device.

36 is an O-ring for sealing the float switch 28.

When the adjustment knob 35 is rotated, the connection shaft 33 is rotated because the rotational friction between the QIJ ring 36 and the measuring tank 19 is thicker than the rotational friction between the connection shaft 33 and the screw of the adjustment knob 35. It does not move, and the adjustment knob 35
only rotates, and the connecting shaft 33 slides up and down. This causes the first reed switch 30 . Since the water level detection position of the second reed switch 31 changes, the volume measured in the metering tank 19 can be finely adjusted.

An electromagnetic pump 37 constitutes a water supply device, which sucks water from the bottom of the metering tank 19 and supplies it to the water channel 4 of the water heating unit 1. A water supply channel is formed from the bottom of the metering tank 19 through the pump 37 to the water channel 4 and the nozzle hole 11 of the guide ring 7.

The set seat 13 moves up and down in conjunction with the rotation of the holder 6, and the camshaft 26 also moves in conjunction with the rotation of the holder 6. When the holder 6 and the hook piece 16 engage with each other due to the rise of the set seat 13, the rotation of the camshaft 26 The movement causes the cam 24 to push up the valve shaft 21 and close the water supply valve 2o. On the other hand, when the engagement between the holder 6 and the hook piece 16 is released, the cam shaft 25 rotates and the water supply pulp 20 is opened. Reference numeral 38 denotes a safety switch for the pump 37 provided below the cam 24. This safety switch 38 is pressed and closed by the cam 24 as the cam shaft 25 rotates, thereby enabling the pump 37 to operate.

Next, the operation of the hot water supply device for brewing coffee or the like constructed as described above will be explained.

First, when the heater 3 starts to be energized, the water boiling unit 1 is heated and controlled to a predetermined temperature by an automatic temperature controller (not shown). Next, when water is poured into the water tank 17, the water flows into the metering tank 19 via the water supply valve 20. At this time, the air in the metering tank 19 is expelled from the ventilation pipe 26. When the metering tank 19 becomes full, water collects from the bottom 18 of the water tank 17, and when it reaches a predetermined amount, a water level detection device (not shown), which is set to the lowest water level in the water tank, operates and detects this lowest water level. Complete water injection beyond the required amount.

Next, the capsule 9 is placed on the capsule seat 15 of the set seat 13, and the holder 6 is rotated. The cam 24 is operated by the rotation of the cam shaft 25 in conjunction with the rotation of the holder 60, and the valve shaft 21 is raised against the return spring 23.
will be closed. On the other hand, the setting seat 13 rises in conjunction with the rotation of the holder 60, and the capsule 9 is stored in the storage part 10 of the guide link 7. The capsule 9 is moved between the guide ring 7 and the capsule by the engagement of the holder 6 and the hook piece 16. seat 1
5, it is kept airtight. Note that when the capsule 9 is stored in the guide ring 7, the nozzle 12 breaks through the upper part of the capsule 9, and the nozzle hole 11 opens into the capsule 9.

In this state, when the pump 37 is operated next, the water in the metering tank 19 is sequentially pumped by the pump 37 and boiled in the water heating unit 1, and further reaches the coffee powder 8 in the capsule 9 to infuse the coffee. It flows out from the discharge port 14 and is completed sequentially. On the other hand, air flows into the metering tank 19 through the ventilation pipe 26 as the water is drained, and the water level decreases without creating a negative pressure. When the preset water level is reached, the float switch 28 operates to stop the operation of the pump 37 and complete the brewing of the coffee.

To adjust the amount of hot water supplied, rotate the adjustment knob 35 rotatably provided on the back plate 34, and raise or lower the float switch 28 via the connecting shaft 33 screwed into the female thread of this adjustment knob 36. In one embodiment of the present invention, the detection water level at which the first reed switch 30 operates is approximately 50 to 70 cc, and the second reed switch 3
The detection water level at which No. 1 operates can be adjusted from 110 to 130 cc i, making it possible to selectively supply any fixed amount of hot water within these ranges.

Further, in one embodiment of the present invention, if the inner diameter of the metering tank 19 is approximately 60M and the pitch of the screw of the adjustment knob 35 is approximately 2 threads, then when the adjustment knob 36 is rotated once,
The amount of water detected can be adjusted by approximately 5cc, and the back plate 34
By adding a scale near the outer periphery of the adjustment knob 36, it is possible to easily adjust the amount of water to a desired level.

Furthermore, when brewing coffee continuously, when the holder 6 is rotated in the opposite direction to that described above, the brewed capsule 9 is taken out and at the same time, the camshaft 25 is rotated in conjunction with the rotation of the holder 60. rotates, the water supply pulp 20 is opened by the return spring 23, and water is poured into the metering tank 19 from the water tank 17.

Thereafter, operations similar to those described above will be repeated.

According to this embodiment, the measuring tank 19 is provided below the water tank 17, and the water tank 17 and the measuring tank 1
9 through the water supply pulp 2Q, and the cam 24
is linked with the holder 6 to raise and lower the valve shaft 21 of the water supply pulp 2o, and a vent pipe 26 communicating with the metering tank 19 is provided, and furthermore, the column 29 of the float switch 28 provided in the metering tank 19 is connected to the connecting shaft. Since the back plate 34 that forms the outer periphery of the main body can be raised and lowered from the outside using the adjustment knob 35 via the back plate 33, a constant amount of hot water can be supplied at all times, and as a result, variations in the amount of coffee infused can be minimized. In addition, the amount of coffee to be infused can be easily changed by a simple operation depending on the size of the coffee cup used, and therefore the appropriate amount of coffee can always be infused into any coffee cup. .

In one embodiment of the present invention, when operating the water supply pulp 20, the rotation of the holder 6 is linked to the camshaft 25 and the valve shaft 21 is raised and lowered by the cam 24, but a solenoid or the like is not used. The valve shaft 21 may be raised and lowered by using the pump 3a.The key point is that the water supply pulp 20 closes at the same time as or before the start of operation of the pump 37, and the water supply pulp 20 opens at the same time as or after the completion of operation of the pump 3a. good.

Further, in one embodiment of the present invention, the float switch 28 constituting the water level detection section is moved up and down, but in this case, there is no need to move the water level detection section, and in short, as long as the detected water level moves It's good.

Furthermore, it goes without saying that the material to be leached may be instant coffee, instant soup, black tea, etc., and is not limited to coffee powder.

Effects of the Invention As described above, according to the present invention, a water tank, a measuring tank having a top surface that is a part of the bottom surface of the water tank and communicating with the vicinity of the bottom surface of the water tank via a water supply pulp; A vent pipe, one of which opens above the highest water level of the water tank and the other communicates with the measuring tank; one of which opens near the bottom of the measuring tank, and the other pipe supplies water from the measuring tank. a water supply channel whose other end is opened to the material to be leached through a water supply device; a water heating unit that includes a part of the water supply channel and is equipped with a heating element; or an opening/closing means that closes before that and opens at the same time as or after the completion of operation of the water supply device; a water level detection section that is housed inside the metering tank and can move the detected water level up and down; Since the adjustment device is equipped with an adjustment knob to operate the water level detection section, by operating the adjustment knob from the outside of the main body, it is possible to easily obtain the desired amount of infusion liquid such as coffee, and to adjust the infusion liquid. Variations in the amount of hot water can also be minimized, and furthermore, leaching can be performed under ideal high pressure, making it possible to supply hot water in a practically superior quantity.

[Brief explanation of the drawing]

The figure is a sectional side view of a quantitative hot water supply device for brewing coffee, etc., showing one embodiment of the present invention. 1...Kettle unit, 3...Heater (
heating element), 4... Water channel, 6... Holder, 8... Coffee powder, 11... Nozzle hole, 1
7... Water tank, 18... Bottom, 19...
...Measuring tank, 20...Water supply pulp, 24.
...Cam, 26...Vent pipe, 28...Float switch (water level detection part), 33...Connection shaft, 3
4... Back plate, 35... Adjustment knob, 3A...
・Pump (water supply device).

Claims (1)

[Claims] a water tank; a measuring tank having a part of the bottom surface of the water tank as the top surface and communicating with the vicinity of the bottom surface of the water tank via a water supply valve; one side opening above the highest water level of the water tank; , and a vent pipe with the other end communicating with the measuring tank, one end opening near the bottom of the measuring tank, and the other end opening into the leachable material via a water conveying device that conveys water from the measuring tank. A water supply channel; a water heating unit that includes a part of the water supply channel and is equipped with a heating element;
an opening/closing means that closes the water supply valve at the same time or before the start of operation of the water supply device and opens at the same time or after the completion of operation of the water supply device; A metered water supply device for brewing coffee or the like, comprising a movable water level detection section and an adjustment device provided with an adjustment knob on the outside of the main body to operate the water level detection section.