JPH0319327Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] Industrial application field) The present invention relates to a coffee extractor that extracts coffee liquid by intermittently supplying hot water to coffee powder by siphoning. .

(Prior art) Conventionally, in order to extract a rich and delicious coffee liquid, hot water is intermittently supplied to the coffee grounds throughout the extraction period, and the coffee grounds are steamed each time the hot water supply is stopped. It is known that it is good to extract For this reason, there is a hot water storage tank that stores hot water supplied from the hot water generation device through the hot water supply pipe above the coffee brewing part that accommodates coffee powder, and when a predetermined amount of hot water is stored in this hot water storage tank, the hot water is heated. A system is provided in which a siphon mechanism is provided to supply hot water to the coffee extracting part by a siphon phenomenon, and hot water is intermittently supplied to the coffee grounds to extract coffee liquid. The specific structure of the hot water storage tank and siphon mechanism is shown in FIG. That is, in the same figure, A is a hot water storage tank, B is a hot water pipe whose one end is connected to the side wall of this hot water storage tank A, and C is an inverted U-shaped pipe that constitutes a siphon mechanism, and the inlet of this inverted U-shaped pipe C is The end D faces the bottom surface of the hot water storage tank A with a predetermined gap in between, and the outlet end E penetrates through the bottom wall of the hot water storage tank A and is located below the hot water storage tank A.

(Problems to be Solved by the Invention) However, in the method that supplies hot water by the siphon phenomenon as described above, after the extraction of coffee liquid is completed, the inlet end D of the inverted U-shaped pipe C is placed inside the hot water storage tank A. There is a problem that the amount of hot water always remains, which is not desirable from a sanitary point of view.

The present invention was developed in view of the above circumstances, and its purpose is to provide a coffee extractor that can prevent hot water from remaining after the coffee liquid is extracted, thereby improving hygiene. It is in.

[Structure of the invention] (Means for solving the problem) The invention consists of a hot water generation device that generates hot water by heating water with a heater, and a storage system for storing the hot water supplied from the hot water generation device through a hot water supply pipe. A coffee brewer comprising a hot water storage tank and a siphon mechanism that supplies the hot water to a coffee brewing section containing coffee powder by a siphon phenomenon when a predetermined amount of hot water is stored in the hot water storage tank, wherein the hot water supply pipe The hot water tank is characterized in that the hot water outlet for the hot water storage tank is located at the lowest part of the hot water storage tank.

(Function) In the case of the above, the hot water remaining in the hot water storage tank after the extraction of coffee liquid is finished is led to the hot water generating device section through the hot water supply pipe from the outlet of the hot water supply pipe located at the lowest part of the hot water storage tank. Here, it is heated and eventually all of it disappears by evaporation.

(Example) The following is an example of the present invention in Figures 1 to 3.
This will be explained with reference to the figures. First, in Figure 1, 1
1 is the body of a coffee brewer, which forms a water storage tank 2 in the left half of the figure, a cup holder 3 in the lower right half, and a relatively small-capacity hot water storage tank 4 in the upper part. are doing. Reference numeral 5 denotes a hot water generating device, which is constructed by embedding a heating pipe 7 in a heating plate 6 equipped with an electric heater (not shown). It is disposed in close contact with the lower surface of the plate 3a. One end of the heating pipe 7 is connected to the water outlet 2a at the bottom of the water storage tank 2, and the other end extends upward to form a hot water supply pipe 8. 4 is connected to the bottom wall in this case. In addition, 10 is a check valve provided at the water outlet 2a of the water storage tank 2;
Reference numeral 1 denotes a lid removably provided at the upper opening of the hot water storage tank 4, and a hole 12 is formed in the lid 11. 13 is an inverted U-shaped pipe which is a siphon mechanism installed in the hot water storage tank 4, and one end of this is the inlet end 1.
3a faces the inner bottom surface of the hot water storage tank 4 through a slight gap, and the other end, the outlet end 13b, faces the inner bottom surface of the hot water storage tank 4.
It is located below the hot water storage tank 4 by penetrating the bottom wall of the tank 4 in a watertight manner. On the other hand, 14 is a cup which is removably placed on the heat exchanger plate 3a. 15 is a cup-shaped filter serving as a coffee extraction part;
A large number of liquid passage holes 16 are formed in the bottom surface portion 15a, and a flange portion 17 is further formed on the periphery of the bottom portion. The filter 15 is placed on the upper opening of the cup 14 via the flange 17,
A filter 18 is housed inside. 19 is a lid placed on the top opening of the filter 15;
A relatively large-diameter circular hole 20 and a hot water diffusion plate 21 are provided in the center of this.

Next, the operation of the above configuration will be explained. When extracting coffee liquid, an amount of water corresponding to the number of people is poured into the water storage tank 2, a corresponding amount of coffee powder is also stored in the filter 15, and then the electric heater of the hot water generating device 5 is energize. Then, the water in the heating pipe 7 supplied from the water storage tank 2 is heated to generate hot water, and the hot water is pushed up inside the hot water supply pipe 8 by boiling pressure and flows into the hot water storage tank 4. The hot water that has flowed into the hot water storage tank 4 gradually increases its water level as it enters the inverted U-shaped pipe 13, and as shown in FIG. Due to the siphon phenomenon, the hot water in the hot water storage tank 4 flows out through the inverted U-shaped pipe 13 as shown by arrow A. The hot water flowing out from the outlet end 13b of the inverted U-shaped tube 13 is diffused by the hot water diffusion plate 21 and evenly permeates the entire coffee grounds in the filter 15. Then, when the water level in the hot water storage tank 4 gradually decreases due to the siphon phenomenon and reaches the inlet end 13a of the inverted U-shaped tube 13, air flows into the inverted U-shaped tube 13.
As the hot water begins to be sucked into the filter 15, the supply of hot water to the filter 15 is stopped. When this happens, the water level of the hot water in the hot water storage tank 4 rises again and the inverted U-shaped pipe 13
Since hot water is not supplied to the coffee grounds until the top of the coffee powder is covered, the coffee grounds are sufficiently steamed by the hot water supplied as described above during this hot water supply stop, making it easy to extract the coffee extract. When the hot water in the hot water storage tank 4 increases and hot water is supplied to the coffee grounds again, the coffee grounds have been sufficiently steamed, so a so-called rich coffee liquid is extracted and dripped into the cup 14. and stored. After that, supply and stop of hot water are repeated several times.

Then, by repeating the supply and stop of hot water as described above, all the water in the water storage tank 2 is turned into hot water and is supplied to the hot water storage tank 4, and the supply of hot water from the inverted U-shaped pipe 13 to the filter 15 is stopped. Then, extraction of coffee liquid is completed. At this time, hot water in an amount up to the inlet end 13a of the inverted U-shaped pipe 13 remains in the hot water storage tank 4, but the remaining hot water is transferred to the hot water storage tank 4 as shown by the arrow B in FIG. The hot water is returned to the heating pipe 7 of the hot water generating device 5 through the hot water supply pipe 8 from the hot water outlet 9 opened at the bottom of the hot water generating device 5 .
Then, the hot water is heated again by the hot water generating device 5 and boils, rises in the hot water supply pipe 8 due to the boiling, and after this rise, descends in the hot water supply pipe 8 again. By repeating this process of lowering, boiling, and rising the hot water several times, the remaining hot water is forced to evaporate and finally disappears from the heating pipe 7 and the hot water supply pipe 8. Incidentally, if the temperature of the heating pipe 7 suddenly rises due to the inside of the heating pipe 7 becoming empty, a thermostat (not shown) detects this and stops the hot water generation operation of the hot water generation device 5. However, even after this hot water generation operation is stopped, the hot water generation device 5 still has residual heat at a sufficiently high temperature, and even if a small amount of hot water remains in the heating pipe 7 of this hot water generation device 5, it will not be absorbed by the hot water generation device 5. 5
It disappears with sufficient residual heat.

In addition, particularly in this embodiment, the hot water generating device 5 is operated by switching the electric heater in the hot water generating device 5 to generate a smaller amount of heat than during the hot water generating operation based on the operation of the thermostat. It is configured to perform a heat-retaining operation, and in this case, the heating effect of the heat-retaining operation also ensures that the hot water disappears even more reliably.

However, the hot water generating device 5 does not necessarily have to be configured to perform a heat retention operation. In addition, the bottom surface of the hot water storage tank 4 is slightly inclined, and the hot water outlet 9 of the hot water supply pipe 8 is located at the lowest part of this bottom surface, thereby making it easier to guide the remaining hot water in the hot water storage tank 4 to the hot water supply pipe 8. Also good.

In addition, the present invention is not limited to the above-mentioned embodiments, and can be implemented with various modifications without departing from the gist.

[Effects of the invention] As is clear from the above description, the present invention is a coffee brewer that extracts coffee liquid by siphoning, and the hot water outlet of the hot water supply pipe to the hot water storage tank is located at the bottom of the hot water storage tank. Since the hot water remaining in the hot water storage tank is guided to the hot water generating device after the extraction of the coffee liquid is finished, the remaining hot water can be completely eliminated by the hot water generating device. It has the excellent effect of not leaving any residue anywhere and improving hygiene.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the present invention,
Fig. 1 is a longitudinal sectional view of the whole, Figs. 2 and 3 are longitudinal sectional views of main parts to explain different functions, and Fig. 4 is a diagram equivalent to Fig. 3 showing the conventional configuration. be. In the drawing, 4 is a hot water storage tank, 5 is a hot water generator, 8
is a hot water pipe, 9 is a hot water outlet, 13 is an inverted U-shaped pipe (siphon mechanism), 15 is a filter (coffee extraction part)
It is.

Claims (1)

[Scope of utility model registration request] A hot water generation device that heats water with a heater to generate hot water, a hot water storage tank that stores the hot water supplied from the hot water generation device through a hot water supply pipe, and a hot water storage tank that stores hot water when a predetermined amount of hot water is stored in the hot water storage tank. The apparatus is equipped with a siphon mechanism that supplies the hot water to a coffee brewing section containing coffee powder by siphoning, characterized in that the hot water outlet of the hot water supply pipe to the hot water storage tank is located at the lowest part of the hot water storage tank. coffee brewer.