JPS6282921A - Electric coffee brewer - 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 the Invention The present invention relates to a drip type electric coffee brewer.

2. Description of the Related Art As a conventional coffee brewer of this kind, one having a structure as shown in FIG. 6 and FIG. 6 is known. That is, the coffee boiler having the configuration shown in FIG. 5 introduces water stored in a tank 2 provided in a part of the main body 1 through a check valve 3 to a heating vibroformer integrally formed with a sheathed heater 4. Then, the hot water is pushed up by the steam pressure generated by heating with this heating vibro and guided to the discharge pipe 7 located above the container 6 containing the coffee grounds, and the hot water is poured from the discharge pipe 7 into the container 6. The coffee liquid was obtained by pouring. As shown in FIG.
The sheathed heater 4 is positioned inside and fixed to the hot plate 8 with the heating vibro almost aligned, and the hot plate 8 has a temperature control device installed on the water inflow side at one end outside the heating vibro. It was equipped with a thermostat 9 to perform this.

Problems to be Solved by the Invention However, with this configuration, the water introduced into the heating pipe 5 boils locally within the heating pipe 5, and the steam pressure pushes up the hot water. ,
The temperature of the water discharged from the discharge lower is low because some unboiled water is mixed in. In addition, the temperature of the water introduced from the tank 2 in the heating pipe 5 is low, and it is necessary to boil it from this low state, so it takes a long time to reach the specified temperature.Generally, good quality coffee liquid is used. In order to extract, the extraction must be completed in about 3 to 4 minutes using boiling water at a high temperature of 92 to 96°C.

However, in the conventional configuration described above, the discharge temperature is low and it takes a long time until the water in the tank 2 is completely discharged, so the above conditions cannot be satisfied, resulting in extremely bad coffee.

In addition, if hot water is poured into the tank 2 of a conventional coffee boiler, the above-mentioned problems can be solved to some extent and extraction at a high temperature is possible; At the same time, since hot water enters the inflow side of the heating pipe 5, the temperature of the thermostat 9 installed near this inflow side increases, making it easier to operate.As a result, there is still water in the tank 5. The thermostat 9 operates with hot water in it, and the power to the sheathed heater 4 cannot be stopped and the hot water cannot be discharged.
There were problems such as the dispensing time being long and the coffee not being properly extracted.

The present invention solves the above-mentioned conventional problems, and optimizes the discharge temperature and extraction time, which are the conditions for obtaining high-quality coffee liquid, to obtain high-quality coffee liquid, and also solves the conventional extraction method. Means for solving the problems In order to solve the above problems, the present invention provides a hot plate provided on a main body, a hot plate provided on the main body, The water in the tank is heated by the hot plate and circulated back to the tank, and when the water temperature in the tank reaches a predetermined temperature, the water temperature is detected and activated. A hot water supply device that switches from supplying hot water to the tank side to supplying hot water to the coffee powder side by means of a member, and is configured such that the operation of the water supply device can be switched arbitrarily to directly supply hot water to the coffee powder side, and A substantially annular heating pipe and a sheathed heater are provided on the plate, the heating pipe is located inside the sheathed heater, and the heating plate is located between both ends of the heating pipe to control the temperature of the heating plate. According to the above configuration, which is equipped with a thermostat, the operation of the hot water supply device can be switched arbitrarily to supply hot water directly to the coffee powder side, so that the inside of the tank heated by the hot plate is heated. The water is circulated back to the tank, and when the water temperature in the tank reaches a predetermined temperature, a heat-responsive member that senses the water temperature and operates switches from supplying hot water to the tank to supplying hot water to the coffee grounds. , you can arbitrarily choose between an extraction method that produces high-quality coffee in a short amount of time, and an extraction method that skips the circulation of hot water to a tank and supplies hot water directly to the coffee grounds to shorten the total extraction time. Moreover, since a thermostand is provided on the hot plate between both ends of a heating pipe formed in a substantially annular shape on the hot plate, both of these extraction methods
This allows the thermostat to operate reliably.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings. In FIGS. 1 to 4, reference numeral 11 denotes a main body, and a tank 12 for storing water can be detachably attached to the back of the main body 11.

The coffee beans are crushed in a substantially cylindrical raw material crushing chamber 13 by rotationally driven force by a drive motor 14 and by a vine 15, and this raw material crushing chamber 13 accommodates the crushed coffee beans. In addition, a filtration chamber 16 for extraction is assembled in parallel, and the raw material crushing chamber 13 and filtration chamber 1
6 communicate with each other through a porous portion 13a, and the ground coffee powder is discharged into the filtration chamber 16 when it reaches an appropriate particle size.

Further, a heating plate 20 is provided on the bottom surface of the main body 11, and a heating pipe 18 formed in a substantially annular shape and a sheathed heater 19 are placed along the heating plate 20, and the heating pipe 18 is positioned inside. One end of the heating pipe 18 is connected to the tank 12 via a check valve 21, and the other end is connected to a water pipe 22 for discharging boiling water. Furthermore, this hot plate 20 is provided with a thermostat 23 located between both ends of the heating pipe 180 for controlling the temperature of the hot plate 20, and a temperature fuse 24 for preventing excessive temperature rise of the hot plate 2o.

Reference numeral 25 denotes a hot water receiving chamber for reducing the pressure of the hot water and steam heated by the hot plate 20 and discharged, and this hot water receiving chamber 26 has one end opened toward the upper surface and the other end connected to the water pipe 22. A discharge port 26 and a substantially cylindrical outlet 27 are provided. In addition, a hot water guide 28 that can freely rotate in the vertical direction is provided at the drain port 27, and the hot water guide 28 is arranged so that the opening 28a always faces toward the filtration chamber 16, as shown by the solid line in FIG. By switching the hot water guide 28, the hot water flowing out from the hot water outlet 27 can be selectively guided to either the tank 12 or the filtration chamber 16 through the opening 3o. It is possible. Further, the hot water guide 28 is provided with a locking portion 31.

Reference numeral 32 denotes a thermally responsive member disposed near the bottom of the tank 12, and when the water temperature in the tank 12 is low, the thermally responsive member 32 is in a compressed state by yielding to the extensibility of the bias spring 33. However, when the water reaches the thermally responsive temperature, the thermally responsive member 32 expands and pushes the rod 34 upward. In addition,
When the thermally responsive member 32 is in a compressed state, as shown in FIG. The other end of the hook 37 biased by the spring 36 is engaged and locked. Also, when the thermally responsive member 32 expands, the rod 3
4 is pushed upward and one end of the hook 37 is pushed upward, so the other end of the hook 37 is rotated downward due to the sheen movement, thereby locking the locking portion 3 of the hot water guide 28.
The engagement with 1 is released. As a result, the hot water guide 28 is rotated by the biasing force of the spring 29 to a position where its opening faces toward the filtration chamber 16 side.

The engagement between the other end of the hook 37 and the locking portion 31 of the hot water guide 28 can be arbitrarily released manually, that is, by operating the hot water guide 28.

The operation of the above configuration will be explained next.

First, water in the tank 12 flows into the heating pipe 18 of the hot plate 20, is heated by the sheathed heater 19, and begins to boil locally. Due to the steam pressure at this time, the hot water is ejected into the hot water receiving chamber 25 through the water pipe 22 without flowing back toward the tank 12 due to the presence of the check valve 21. At this time, the hot water is at the outlet 27.
The hot water is returned to the tank 12 from the opening 30 of the hot water guide 28 through the opening 35 of the hot water guide 28. As this operation is continuously repeated, the water temperature in the tank 12 increases. Initially, the temperature of the hot water discharged is 80~9℃), but the temperature of the hot water inside the tank 12 gradually rises and eventually reaches 100℃.
: Becomes a nearby boiling state. At this time, the thermally responsive member 32 operates to push the rod 34 upward and release the engagement between the other end of the hook 37 and the locking portion 31 of the hot water guide 28, so that the hot water guide 28 is attached to the spring 29. Due to the force, it rotates toward the filtration chamber 16 that stores the coffee powder crushed in the raw material crushing chamber 13. As a result, high-temperature hot water flows through the opening 3o of the drain port 27 and the opening 28a of the hot water guide 28 into the filtration chamber.
6 and extracts coffee.

In this state, the temperature of the water flowing into the heating pipe 18 is high, so it can be boiled in a short time, and a large amount of hot water can be supplied to the filtration chamber 16 to extract coffee in a short time. It is possible. However, with the above extraction method, it takes time to raise the water temperature in the tank 12, and as a result, the total time required for extraction becomes longer.
Since the engagement between the locking part 31 of No. 8 and the other end of the hook 37 can be arbitrarily released manually,
Hot water can be supplied directly to the filtration chamber 16 from the beginning,
As a result, the total time can be shortened.

Note that the thermostat 23 provided on the hot plate 20 operates when the water supplied from the tank 12 runs out and the temperature of the hot plate 20 rises to stop the power supply to the sheathed heater 19; When the temperature drops, the sheathed heater 19 is energized, and this operation is repeated to keep the temperature of the coffee liquid constant. Even if the water temperature is low or still high, the thermostat 23 is located between both ends of the heating pipe 18 and is provided on the hot plate 2o. 18, and as a result, it is less affected by the supplied water temperature, and the temperature when water or hot water is supplied into the heating pipe 18 and when water or hot water is not supplied. Since the difference is large, the operation of the thermostat 23 is accurate and reliable, and therefore the power to the sheathed heater 19 does not stop during the brewing process. It is possible to arbitrarily select an extraction method that shortens the time.

Effects of the Invention As described above, according to the present invention, the water in the tank is heated by a hot plate and circulated back to the tank, and when the water temperature in the tank reaches a predetermined temperature, the water temperature is sensed and activated. It has a hot water supply device that switches from supplying hot water to the tank side to supplying hot water to the coffee powder side using a heat-responsive member, and is configured so that the operation of the hot water supply device can be switched arbitrarily to supply hot water directly to the coffee powder side, The heating plate is provided with a substantially annular heating pipe and a seven-piece heater, the heating pipe is located inside the sheathed heater, and the heating plate is provided with a heating pipe located between both ends of the heating pipe. Since it is equipped with a thermostat that controls the temperature, the optimal extraction method is to extract coffee in a short time using high-temperature water, rather than supplying hot water to the coffee grounds after the discharge temperature reaches boiling temperature, and the best way to extract coffee in a short time is by supplying hot water to the tank. It is possible to arbitrarily select an extraction method that omit circulation and directly supply hot water to coffee powder from the beginning to shorten the total time required for coffee extraction, and
In either of these methods, the thermostat can be operated accurately and reliably.

[Brief explanation of drawings]

Fig. 1 is a sectional view of an electric coffee boiler showing an embodiment of the present invention, Fig. 2 is a plan view of the same main part, Figs. 3 and 4 are sectional views of the same main part, and Fig. 5 is a conventional one. FIG. 6 is a sectional view of the electric coffee brewer, and FIG. 6 is a plan view of the main parts thereof. 11... Body, 12... Tank, 16
...Filtering chamber, 18...Heating pipe, 1
9...Sheathed heater, 20...Heat plate, 23...Thermal response member, 23...Thermostator l-127...Drain port , 28...
...Hot water guide. Name of agent: Patent attorney Toshio Nakao and one other person IQ
---Shizuhigoo 20--? Naturally 1 anti 15/32? θ /8 /'/ ta--゛way:Ikuhebip2,3--thermosgood

Claims (1)

[Claims] A main body, a hot plate provided on the main body, a tank provided on the main body for storing water, and the water in the tank is heated by the hot plate and circulated back to the tank to control the water temperature in the tank. a hot water supply device that switches from supplying hot water to the tank side to supplying hot water to the coffee powder side using a thermally responsive member that senses the water temperature and operates when the water reaches a predetermined temperature, and the operation of the water heater can be switched arbitrarily. In addition to being configured so that hot water can be directly supplied to the coffee powder side, the heating plate is provided with a substantially annular heating pipe and a sheathed heater, the heating pipe is located inside the sheathed heater, and the heating plate is provided with a sheathed heater. An electric coffee brewer comprising a thermostat located between both ends of a heating pipe to control the temperature of the heating plate.