JPH0621407Y2 - Siphon beverage extractor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a siphon-type beverage extractor, and more particularly to an improved control configuration of a heater for boiling water.

(Prior Art) In a siphon-type coffee extractor, the water in the lower container is heated to a boil by a heater, and the internal pressure of the lower container increases due to this boiling, and the hot water in the lower container passes through a water pipe into the upper container. The coffee liquid is raised to extract the coffee liquid, and then the heater is turned off to naturally cool the lower container, and the coffee liquid in the upper container is lowered and stored in the lower container through the filter and the water pipe due to the decrease in the internal pressure. I am trying. Then, conventionally, the rise of hot water from the lower container into the upper container is detected by the temperature rise of the upper container, and the heater is turned off after a certain time has elapsed from the time of detection.

(Problems to be Solved by the Invention) After the heater is turned off, it takes a certain time for the lower container to cool and the coffee liquid to drop from the upper container into the lower container. However, this time varies considerably depending on the room temperature, because the cooling ability of the lower container varies depending on the room temperature.

However, conventionally, the time from the rise of hot water in the upper container to the disconnection of the heater is fixed, so the time from the rise of hot water in the upper container to the drop of it is the indoor temperature. It will change depending on. Therefore, the contact time between hot water and coffee powder is long when the room temperature is high,
On the contrary, when the room temperature is low, it becomes short, and as a result, there is a problem that the shade of the coffee liquid largely changes depending on the room temperature.

Therefore, an object of the present invention is to provide a siphon-type beverage extractor capable of minimizing the change in the contact time between hot water and the extraction raw material due to the change in indoor temperature.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the siphon-type beverage extractor of the present invention includes hot water rising detection means for detecting that hot water has risen from a lower container to an upper container. A room temperature sensor that detects the temperature inside the room is provided, and the time from when the hot water rise detection means detects the rise of hot water into the upper container to when the heater is turned off is changed according to the temperature detected by the room temperature sensor. A control device is provided.

(Operation) When the water in the lower container is heated by the heater, the internal pressure of the lower container rises and the hot water rises in the upper container. The rise of the hot water is detected by the hot water rise detecting means. Then, when a certain time has elapsed from the time of this detection, the heater is cut off. In this case, the time from the rise of hot water in the upper container to the disconnection of the heater depends on the temperature detected by the room temperature sensor, and is short when the room temperature is high and long when the room temperature is low. Therefore, the time from the rise of the hot water in the upper container to the fall of the hot water in the lower container is always substantially constant regardless of the room temperature.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

First, in FIG. 1, reference numeral 1 is a base, which is generally U-shaped, and has a bottom portion 2, an intermediate portion 3 and a ceiling portion 4.
Has become Of these, the heater 5 is provided on the upper surface of the bottom 2.
The heating plate 6 heated by the above is provided, and the lower container 8 to which the upper container 7 is detachably attached is placed on the heating plate 6. The upper container 7 integrally has a water pipe 7a inserted into the lower container 8 at the lower part, and a filter 9 for covering the open upper end of the water pipe 7a is detachably mounted inside. Although not shown, a mill device for crushing coffee beans and supplying them into the upper container 7 is provided in the ceiling portion 3.

Reference numeral 10 denotes a container temperature sensor as a hot water rise detecting means, which is arranged obliquely upward so as to contact the lower portion of the upper container 7 at the intermediate portion 3 of the base 1. Reference numeral 11 denotes a room temperature sensor, which is a bottom portion 2 of the base 1 so that the room temperature can be detected.
Is provided on the front surface of the.

In FIG. 2 showing the control circuit configuration, reference numeral 12 is a control device provided in the lower part of the intermediate portion 3 of the base 1, for example, and includes a microcomputer 13. Temperature detection signals from the container temperature sensor 10 and the room temperature sensor 11 are input to the control device 12. Then, the microcomputer 13 causes the heater 5 and the mill motor 1 of the mill device according to a program stored in advance.
4 is controlled through the heater relay 15 and the mill relay 16 to switch on and off. That is, the heater 5 is connected to the AC power supply 17 in series with the relay switch 15a of the heater relay 15, and the mill motor 14 is also connected to the AC power supply 17 in series with the relay switch 16a of the mill relay 16. When the control device 12 energizes the relay coil 15b of the heater relay 15 based on the signal from the microcomputer 13, the relay switch 15
a is turned on, and the heater 5 is energized. When the control device 12 energizes the relay coil 16b of the mill relay 16 based on a signal from the microcomputer 13, the relay switch 16a is turned on and the mill motor 14 is energized.

Next, the operation of the above configuration will be described with reference to the flowchart of FIG.

First, when coffee beans and water are respectively put into the mill device and the lower container 8 and the start switch is operated, first the relay switch 16a for the mill is turned on and the mill motor 14 is energized for a predetermined time. This crushes the coffee beans,
The ground coffee grounds (extraction raw material) is stored in the upper container 7 (step S1).

After that, the relay switch 15a for the heater is turned on and the heater 5 is energized (step S2). As a result, the water stored in the lower container 8 is heated and eventually comes to boil. Then, the internal pressure of the lower container 8 rises due to the steam due to the boiling, and the hot water rises into the upper container 14 through the water pipe 7a due to the pressure, and mixes with the coffee powder in the upper container 14 to extract the coffee liquid (extraction). Liquid).

Now, when the hot water rises into the upper container 7 as described above, the temperature of the upper container 7 rises, so that the temperature detected by the container temperature sensor 10 rises. Then, the control device 12
It is determined that the hot water has risen in the upper container 7 due to the increase in the temperature detected by the container temperature sensor 10 (step S3), and the room temperature sensor 11
The time T from the time when the hot water is detected until the heater 5 is cut off is determined by the detected temperature of.

That is, when the temperature detected by the room temperature sensor 11 is 10 ° C. or lower, the above time is set to 30 seconds, and when the temperature exceeds 10 ° C. and 20 ° C. or lower, it is set to 20 seconds, and when the temperature exceeds 20 ° C. 1
Set to 0 seconds. Then, when the set time elapses from the time when the hot water is detected, the relay switch 15a for the heater is used.
Turns off the heater 5 (above steps S4 to S
8). When the heater 5 is cut off, natural cooling of the lower container 8 starts, and when the internal pressure of the lower container 8 decreases, the coffee liquid in the upper container 7 passes through the filter 9 and the water passage pipe 7a. It descends into the container 8. After that, the lower container 8 is removed from the heating plate 6 and the upper container 7 is removed.
Then, the coffee liquid is poured into the cup from the lower container 8.

As described above, according to the present embodiment, the time from when the hot water rises from the lower container 8 to the upper container 7 until the heater 5 is cut off varies depending on the indoor temperature. Even if there is a circumstance that the time until the coffee liquid drops from the upper container 7 into the lower container 8 varies depending on the room temperature, the time during which hot water is in contact with the coffee powder in the upper container 7 is the room temperature. Regardless of the time, it is maintained for a substantially constant time, and it is possible to prevent the occurrence of the problem that the degree of extraction changes and the shade of coffee liquid changes.

In the above-described embodiment, the rise of the hot water from the lower container 8 to the upper container 7 is detected by detecting the temperature change of the upper container 7 by the container temperature sensor 10. It may be performed by detecting a temperature change. Further, it can be applied not only to extraction of coffee but also extraction of tea and the like.

[Effects of the Invention] As is apparent from the above description, the present invention is configured to change the time between the time when hot water rises from the lower container to the upper container and the heater is cut off according to the room temperature. ,
Even if the time it takes for the extract to drop into the lower container after the heater is turned off varies depending on the room temperature, the contact time of the hot water with the extraction material in the upper container is almost constant and the extraction degree is almost constant. It has an excellent effect that it can be kept constant.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is an overall vertical side view, FIG. 2 is an electrical configuration diagram, and FIG. 3 is a flow chart. In the drawings, 5 is a heater, 7 is an upper container, 8 is a lower container, 1
Reference numeral 0 is a container temperature sensor (hot water rise detection means), 11 is a room temperature sensor, and 12 is a control device.

Claims (1)

[Scope of utility model registration request] 1. A heater heats water in a lower container, and the heating causes an increase in internal pressure of the lower container to raise hot water into an upper container containing an extraction raw material. A lowering of the internal pressure of the lower container due to electric power to lower it from the upper container into the lower container, a hot water rise detecting means for detecting a rise of hot water to the upper container, and a room temperature sensor for detecting the temperature in the room. A controller for changing the time from when the hot water rise detecting means detects the rise of hot water into the upper container to when the heater is turned off, in accordance with the temperature detected by the room temperature sensor. Characteristic siphon-type beverage extractor.