JP3579313B2 - Automatic extractor - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an automatic extractor that always extracts coffee or the like at an optimum temperature.
[0002]
[Prior art]
A commercial coffee extractor that always obtains coffee at the optimal temperature may extract several people at once, so a large amount of hot water maintained at the optimal extraction temperature (near boiling point) is stored in the tank. Hot water.
[0003]
The temperature of the hot water in the tank is controlled by a boiling sensor so that the temperature of the hot water heated by the heater is maintained at the boiling temperature (around 95 degrees). (JP-A-2-95319)
As described above, in order to take out a necessary amount of hot water when needed, a large-capacity (5 to 10 liters) water tank and a large-capacity (1 kilowatt) heater are required. Even for commercial use, sometimes the coffee is not extracted between one and two hours.
[0004]
[Problems to be solved by the invention]
Even in a normal standby state where the number of extractions is large, the heater is energized and a large amount of hot water is maintained at a high temperature, so that the power consumption of the heater is large and the electricity bill does not remain.
[0005]
Such a device has a drawback in that, in a standby state in which the number of extractions is small, particularly in winter, the electricity charge is relatively high despite the low number of extractions.
[0006]
As a method for improving this point, there is a method in which a small-capacity water-holding tank for maintaining the temperature near the boiling temperature and a heat-retaining tank for maintaining the heat-retaining temperature connected to the hot-water tank are provided, and a heater is attached to each tank. However, the provision of the two heaters did not sufficiently reduce the electricity bill, and measures were desired.
[0007]
That is, each heater heats hot water in each tank and wastes a large amount of electric power, and heat dissipation from each tank during the standby for extraction increases the energizing time of each heater, which is improper. It was economic.
[0008]
In addition, it requires a lot of trouble and management, such as installation and control of two heaters, insulation measures, and the like.
[0009]
According to the present invention, the temperature of the hot water in the hot water storage tank is maintained at a predetermined temperature by one heater attached to the hot water tank, so that the pouring temperature at the time of extraction is maintained at an optimum level, and wasteful power consumption occurs. The element has been removed.
[0010]
[Means for Solving the Problems]
The present invention relates to a hot water storage tank, a hot water tank having a smaller capacity than the hot water storage tank, a heater attached to the hot water tank and heating internal water, and a communication for communicating the hot water storage tank with the hot water tank. A pipe, a hot water supply pipe, a pump provided in a channel of the communication pipe for supplying water in the hot water storage tank to a hot water tank, and a hot water temperature sensor attached to the hot water storage tank and maintaining a predetermined temperature lower than a boiling temperature A hot water sensor attached to the hot water tank and maintaining a hot water temperature near the boiling temperature; and a pouring valve for pouring hot water from the hot water tank, wherein the pump is linked with the hot water temperature sensor. When the hot water temperature in the hot water storage tank is lower than the predetermined temperature, the operation is performed, and the hot water in the hot water storage tank and the hot water in the hot water tank are circulated through the communication pipe and the hot water supply pipe. It is intended to stop.
[0011]
Further, the temperature of the hot water in the hot water tank by the hot water sensor is maintained at about 95 degrees, and the temperature of the hot water in the hot water storage tank by the hot water temperature sensor is maintained at about 70 degrees.
[0012]
The hot water supply pipe is an overflow pipe attached to the upper side wall of the water heater tank to maintain a constant water level.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to the drawings. The drawing is a schematic diagram of the automatic extractor of the present invention. (1) a hot water storage tank having an internal capacity of about 10 liters, and (2) a hot water temperature attached to a side wall of the hot water storage tank (1) and detecting whether or not the hot water temperature is a predetermined temperature (about 75 degrees). A sensor, (3) is a water supply port provided above the hot water storage tank (1), and (4) is a heat insulating material surrounding the outside of the hot water storage tank (1).
[0014]
(5) a hot water tank of about 1 liter having a smaller capacity than the hot water tank disposed and fixed above the hot water storage tank (1), and (6) mounted on a side wall of the hot water tank (5). A hot water sensor for detecting whether the temperature of the hot water is near the boiling temperature (about 95 degrees), (7) a heat insulating material surrounding the outside of the hot water tank (5), and (8) a hot water tank The heater attached to (5).
[0015]
(9) is a communication pipe connecting the side wall of the hot water storage tank (5) and the upper part of the hot water tank (1), and (10) is provided in a channel of the communication pipe (9) on the side of the hot water storage tank (1). The pump forcibly sends water or hot water in the hot water storage tank into the hot water tank.
[0016]
(11) is a hot water pipe connecting the upper side wall of the hot water tank (5) and the upper side wall of the hot water storage tank (1), and the connecting portion (12) with the hot water tank is used to control the water level in the hot water tank. There is no drain to keep it constant, and it functions as an overflow pipe.
[0017]
(13) is a pouring valve connected to the lower part of the kettle tank (5), (14) is a pouring port provided at the lower part of the pouring valve, and (15) is a coffee machine set on the appliance body (not shown). A filter for storing the powder, (16) is a cup placed below the filter (15).
[0018]
A control system for the hot water temperature sensor (2), the hot water sensor (6), and the heater (8) and the pump (10) will be described.
[0019]
About 1 liter of hot water in the hot water tank (5) is controlled to energize the heater (8) so that the hot water sensor (6) always keeps it at about 95 degrees. For about 10 liters of hot water, the pump (10) is operated / stopped by the hot water temperature sensor (2).
[0020]
That is, when the hot water temperature detected by the hot water temperature sensor (2) is 75 degrees or less, the pump (10) is operated to transfer the hot water in the hot water storage tank into the hot water tank (5) via the communication pipe (9). Send hot water.
[0021]
The hot water fed into the hot water tank (5) overflows from the connecting portion (12) to be fed into the hot water storage tank (1) via the hot water feeding pipe (11) in order to exceed a certain water level. At this time, the temperature of the hot water is relatively high, and the temperature of the hot water in the hot water storage tank (1) is increased.
[0022]
In this way, the pump (10) continues to operate until the temperature of the hot water in the hot water storage tank (1) reaches about 75 degrees, and the hot water in the hot water storage tank is put into the hot water tank (5). Put the hot water in the hot water tank and circulate it.
[0023]
Eventually, the operation of the hot water temperature sensor (2) that detects that the hot water temperature in the hot water storage tank has reached about 75 degrees is stopped.
[0024]
If the hot water temperature in the hot water storage tank (1) is maintained at 75 degrees and the coffee pouring valve (13) is opened to extract coffee, the amount of hot water in the hot water tank (5) is reduced. In this case, the operation of the pump (10) is started with the output detected by the water level sensor (not shown), and the hot water in the hot water storage tank is sent to the hot water tank.
[0025]
Of course, the hot water supply continues until the inside of the hot water tank reaches a certain water level, and when an amount exceeding the certain water level is stored, the excess is transferred from the connecting portion (12) to the hot water storage tank via the hot water pipe (11). Hot water is stored in (1).
[0026]
In the present invention, when the temperature of the hot water in the hot water storage tank is 75 ° C. or less from the initial stage of energization (start of operation) to the appliance body, the pump is operated even if the hot water temperature in the hot water tank has not reached 95 ° C. Circulates the hot water in the hot water storage tank and the hot water tank.
[0027]
In the first preparation stage, it takes a little longer time for the hot water temperatures in both tanks to reach the set hot water temperatures, but it is in a standby state for extraction, that is, the hot water temperature in the hot water tank When the operation of the pump is started after the temperature reaches 95 degrees, in order to prevent the low-temperature water in the hot water storage tank from entering the hot water tank and lowering the hot water temperature at the time of pouring even during the extraction standby. It is.
[0028]
【The invention's effect】
As described above, according to the present invention, when the temperature of the hot water in the hot water storage tank is lower than a predetermined temperature, the pump is operated to circulate the hot water in the hot water storage tank and the hot water in the boiling water tank, and when the temperature reaches the predetermined temperature, the pump operates. Is stopped, a large amount of hot water can be raised to a hot water temperature suitable for extraction by one heater, and continuous extraction can be performed with minimum power consumption.
[0029]
Further, since the hot water temperature of the hot water tank is maintained at about 95 ° C. and the hot water temperature of the hot water storage tank is maintained at about 75 ° C., even if the hot water in the hot water storage tank is fed into the hot water tank by continuous extraction. The temperature of the hot water in the boiling water tank does not decrease so much, and the temperature of the hot water can be raised in a short time to a temperature suitable for 95 ° extraction by heating the heater.
[0030]
Furthermore, since the hot water supply pipe is used as an overflow pipe that is attached to the upper side wall of the hot water tank and keeps the water level in the hot water tank constant, many pipes need to be provided between the hot water tank and the hot water storage tank. Disappears.
[Brief description of the drawings]
FIG. 1 is a schematic diagram of the automatic extractor of the present invention.
[Explanation of symbols]
1 Hot Water Storage Tank 2 Hot Water Temperature Sensor 5 Hot Water Tank 6 Hot Water Sensor 8 Heater 9 Communication Pipe 10 Pump 11 Hot Water Pipe

Claims (3)

A hot water storage tank, a hot water tank having a smaller capacity than the hot water storage tank, a heater attached to the hot water tank to heat water inside, a communication pipe for communicating the hot water storage tank with the hot water tank, and hot water supply A pipe, a pump provided in a channel of the communication pipe to supply water in the hot water storage tank to the hot water tank, a hot water temperature sensor attached to the hot water storage tank and maintaining a predetermined temperature lower than a boiling temperature, and A hot water sensor attached to the boiling tank to maintain the temperature of the hot water near the boiling temperature; and a pouring valve for pouring hot water from the hot water tank, wherein the pump is linked to the hot water temperature sensor and is provided in the hot water storage tank. When the hot water temperature is lower than the predetermined temperature, the operation is performed to circulate the hot water in the hot water storage tank and the hot water in the hot water tank via the communication pipe and the hot water supply pipe, and stop the operation when the predetermined temperature is reached. Automatic extractor characterized and. The automatic extraction according to claim 1, wherein the temperature of the hot water in the hot water tank by the hot water sensor is maintained at about 95 degrees, and the temperature of the hot water in the hot water storage tank by the hot water temperature sensor is maintained at about 70 degrees. vessel. 2. The automatic extractor according to claim 1, wherein the hot water pipe is an overflow pipe that is attached to an upper side wall of a water heating tank and maintains a constant water level. 3.

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