JP2884689B2 - Extractor - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an extractor such as a coffee maker.

2. Description of the Related Art In recent years, extractors such as coffee makers have become widespread,
There is a demand for improved usability.

A conventional extractor of this type generally has a configuration as shown in FIG. Hereinafter, the configuration will be described.

As shown in the figure, a heating element 2 is mounted on a lower peripheral portion of a container 1, and a temperature controller 3 is disposed outside a bottom surface. A container lid 4 is provided above the container 1 in a state of being sealed with the container 1. A tank 5 is provided above the container lid 4, a first opening 5 a is provided on the bottom surface of the tank 5, one end is attached to the first opening 5 a, and the other end is opened downward in the container 1. Water pipe 6 is provided, and the water pipe 6 is connected to the second opening of the container lid 4.
4a is penetrated and arranged. Third opening of container lid 4
4b is provided so as to penetrate the air cylinder 7 opening above the tank 5. The fourth opening 4c of the container lid 4 is provided as a through hole of the water guide pipe 8, and the water guide pipe 8 is bent at one end into a substantially U-shape with a water suction port 8a located above the inside of the container 1, and the other. A discharge port 8b is provided at the end. A basket 9 for storing coffee powder and the like and a decanter 10 for storing coffee liquid and the like are arranged below the basket 9 below the discharge port 8b.
A lid 11 having a water supply port 11a for supplying water is provided above the tank 5.
Is arranged.

The operation of the above configuration will be described. When water is supplied from the water supply port 11a, the water enters the container 1 through the water supply pipe 6 from the first opening 5a of the tank 5. When the water level in the container 1 rises and water is supplied above the water pipe 8, the water in the container 1 is drained from the discharge port 8 b through the water pipe 8. When the water is drained and the water level drops, and reaches the same water level as the water intake port 8a, air enters the container 1 at the same time by the air cylinder 7, so that air also enters the water pipe 8 through the water intake port 8a. 8, the principle of siphon stopped working,
Drainage stops. When electricity is passed through the heating element 2 in this state, the water in the container 1 is heated. When the water temperature rises and reaches the set temperature of the temperature controller 3, the temperature controller 3 operates to stop energizing the heating element 2. Thereafter, coffee powder is put into the basket 9 and set, and water is supplied again from the water supply port 11a.
The coffee liquid is discharged from the discharge port 8b through the outlet, is poured onto the coffee powder in the basket 9, and the coffee liquid drops onto the decanter 10.

Problems to be Solved by the Invention In such a conventional extractor, it takes about 3 minutes to discharge hot water, and it takes another 1 to 2 minutes for the extraction to be completed by touching the coffee powder in the basket 9. Time is needed. In addition, the only way to determine whether or not the coffee is being extracted is to check the dripping of the coffee liquid from the gap between the basket 9 and the decanter 10, and since it is difficult to see, the basket 9 is pulled out during the extraction and the coffee liquid being extracted is removed. There were issues such as spills and burns.

The present invention solves the above-described problems, and improves the sensitivity characteristics of a temperature detection element that detects the temperature of a water guide pipe through which hot water passes during extraction to accurately display the temperature from the start of hot water discharge to the completion of extraction. Is the first object. It is a second object of the present invention to make the passage of hot water in the water guide pipe smooth and make it easy to correlate the sensitivity with the temperature detection element and the extraction, thereby improving the reliability of the display of the extraction step.

Means for Solving the Problems In order to achieve the first object, the present invention has a heating element for heating water, a water pipe for supplying heated water to the extraction device, and a pipe mounted inside the water pipe. A temperature detecting element, and an indicator light, and when the temperature detecting element detects a predetermined temperature or higher, the indicator light blinks, and the detecting element is formed of a thermistor, and the thermistor is covered with a heat-shrinkable tube. This is defined as a first problem solving means.

In order to achieve the second object, in addition to the first means for solving the above-mentioned problems, the thermistor is located in the water pipe and the longitudinal direction of the element is arranged parallel to the water channel of the water pipe. This is the second problem solving means.

According to the first aspect of the present invention, when the hot water for coffee extraction passes through the water guide pipe, the temperature detecting element detects the temperature rise, the indicator light is turned on via the temperature detecting circuit, and the hot water is discharged. After passing through the water guide pipe, the temperature of the temperature detecting element decreases, the indicator light turns off, and the extraction process can be displayed. In addition, the space between the thermistor and the heat shrink tube can be made as small as possible, so that the sensitivity of the thermistor when hot water passes through the water guide pipe can be improved, and the lighting and extinguishing characteristics can be improved. Also, according to the second means for solving the problem, since the front and rear lead portions of the thermistor are usually smaller than the diameter of the thermistor, when the hot water in the water guide pipe passes, the large diameter portion is sequentially reduced from the small diameter portion of the heat shrink tube. It will pass, and the passage of hot water will be smooth.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. The same components as those in the conventional example are denoted by the same reference numerals, and description thereof is omitted.

As shown in the figure, the temperature detecting element 12 is mounted in the water pipe 8, the thermistor 13 and the outside of the thermistor 13 are covered with a heat-shrinkable tube 14, and the heat-shrinkable tube 14 is contracted by heating. . Therefore, the space between the thermistor 13 and the heat-shrinkable tube 14 is small. Also, usually
The lead portions before and after the thermistor 13 are smaller than the diameter of the thermistor 13, so the thermistor 13 is connected to a heat shrink tube.
When covered with 14, the outer diameter of the heat-shrinkable tube 14 is reduced in the lead portion as shown in FIG. As shown in FIG. 3, the temperature detecting element 12 is provided with the water guide pipe 8 arranged in parallel with the longitudinal direction.
It is attached with a sealing material 15 made of rubber. The temperature detection circuit 16 receives the output of the temperature detection element 12 and compares it with a set reference value. When the voltage at the point A is higher than the reference value (when the temperature of the temperature detection element 12 is high), the output of the comparator 17 is low. Becomes
The indicator light 18 turns on. This indicator light 18 is arranged at a position where it can be checked from outside the fuselage. The lighting of the indicator lamp 18 continues while the temperature of the temperature detecting element 12 is high. When the temperature of the temperature detecting element 12 decreases, the voltage at the point A becomes lower than the reference value and the comparator
The output of 17 becomes a high level, and the indicator lamp 18 goes out. According to the experiment, since the extraction is completed when the temperature of the temperature detecting element 12 reaches about 70 ° C., the output of the temperature detecting element 12 at this temperature is used as the reference value. The time required for the temperature detection element 12 to reach this temperature when the extraction is started is about 4 to
5 seconds.

The operation of the above configuration will be described with reference to FIG. When water is supplied from the water supply port 11a, the water enters the container 1 through the water supply pipe 6 from the first opening 5a of the tank 5.
When the water level of the container 1 rises and water is supplied above the water pipe 8, the water in the container 1 is drained from the discharge port 8 b through the water pipe 8. When the water is drained and the water level drops, and reaches the same water level as the water supply port 8a, the air enters the container 1 at the same time by the air cylinder 7, so that the air also enters the water guide pipe 8 from the water intake port 8a. In 8, the principle of siphon does not work and drainage stops. When electricity is passed through the heating element 2 in this state, the water in the container 1 is heated. When the water temperature rises to about 95 ° C., the temperature reaches the set temperature of the temperature controller 3, and the temperature controller 3 operates to stop energizing the heating element 2. Thereafter, the coffee powder is put into the basket 9 and set, and water is supplied again from the water supply port 11a.
The heated hot water inside is discharged from the discharge port 8b through the water guide pipe 8, is poured onto the coffee powder in the basket 9, and the coffee liquid drops onto the decanter 10. During the extraction, the temperature of the temperature detecting element 12 rises when the discharge of hot water is started and becomes higher than the reference value. Therefore, in the temperature detecting circuit 16, the indicator lamp 18 is energized and the indicator lamp 18 is turned on. When the discharge of hot water ends, the temperature detection element 12 starts cooling and the temperature gradually decreases. If the reference value is set to the temperature of the temperature detecting element 12 at the time when the coffee extraction in the basket 9 is completed, the temperature detecting element 12 is connected to the temperature detecting circuit at the end of the extraction.
The energization of the indicator lamp 18 via 16 is stopped. Therefore,
The display during the extraction process can be performed by the indicator lamp 18.

As described above, according to the extraction display device of the extractor according to the embodiment of the present invention, the temperature detecting element 12 is constituted by the thermistor 13, and the thermistor 13 is covered with the heat shrinkable tube 14. The distance between the thermistor 13 and the thermistor 13 is reduced as soon as hot water passes through the water pipe 8.
As soon as the hot water has passed through the water guide pipe 8, cooling is started, the sensitivity of the thermistor 13 is improved, and the on / off characteristics of the indicator lamp 18 are improved. Also,
Since the thermistor 13 is arranged with the longitudinal direction of the element parallel to the water channel of the water guide pipe 8, when hot water passes through the water guide pipe 8, it flows sequentially from the small diameter portion of the heat shrinkable tube 14 to the large diameter portion, The passage becomes smooth, and the sensitivity characteristic of the thermistor 13 is easily correlated with the extraction.

Advantageous Effects of the Invention As is clear from the above embodiments, according to the present invention, a temperature detecting element mounted in a water guide pipe, and an indicator light, the indicator light when the temperature detecting element detects a predetermined temperature or more. Is blinked, so that the extraction state can be accurately displayed by turning on the indicator lamp from the start of hot water discharge to the completion of extraction. In addition, since the temperature detecting element is composed of a thermistor and the thermistor is covered with a heat shrinkable tube, the space between the thermistor and the heat shrinkable tube can be made as small as possible, and the sensitivity of the thermistor can be improved. Until the extraction is completed, it can be displayed accurately and the thermistor is arranged in parallel with the water pipe, so when hot water passes through the water pipe, the large diameter of the thermistor is sequentially reduced from the small diameter part of the heat shrink tube. And the passage of hot water becomes smoother, the perception characteristics of the thermistor become easier to correlate with coffee extraction, and a highly reliable extraction process can be displayed.
Therefore, the indicator lamp can be turned on from the start of hot water discharge to the completion of coffee extraction and can be checked visually from the outside, so there is no need to pull out the basket or decanter by mistake. It can be supplied at low cost and is of great practical value.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an extractor provided with an extraction process display device according to one embodiment of the present invention, FIG. 2 is an enlarged cross-sectional view of a temperature detection element of the extraction process display device, and FIG. FIG. 4 is an electric circuit diagram of the extraction process display device, FIG. 5 is a perspective view of an extractor provided with the extraction process display device, and FIG. 6 is a view of the extraction process display device. FIG. 7 is a sectional view of a conventional extractor, showing a temperature change characteristic of the temperature detecting element. 2 ... heating element, 8 ... water pipe, 12 ... temperature detecting element, 13 ... thermistor, 14 ... heat shrinkable tube, 16 ...
Temperature detection circuit, 18 Indicator lamp.

Claims (2)

(57) [Claims] 1. A heating element for heating water, a water pipe for supplying heated water to an extraction device, a temperature detecting element mounted in the water pipe, and an indicator light, wherein the temperature detecting element is provided. An extractor that detects the temperature of not less than a predetermined temperature, blinks the indicator light, configures the detection element with a thermistor, and covers the thermistor with a heat-shrinkable tube. 2. The extractor according to claim 1, wherein a longitudinal direction of the thermistor is arranged in parallel with a water channel of the water guide pipe.