JPH0329617A - Electric coffee maker - Google Patents

Abstract

PURPOSE:To eliminate cold brewing of coffee even when a small quantity of coffee is extracted by applying the constitution wherein a drive device so sets a flow passage as to first open a tank side outgoing passage, and then selects the flow passage so as to open an extraction chamber side outgoing passage when water in a tank rises to the predetermined temperature. CONSTITUTION:An activated carbon storage container 18 is mounted in the vicinity of the upper end opening of a water storage tank 11. The water is heated with a water heating part 20 in the tank 11, and coffee is brewed through an extraction chamber. Also, one end of a riser 21 is made continuous to the bottom part of the tank 11 via a check valve 15, and the other end thereof is made open to a flow passage selector chamber 22. Furthermore, the flow passage of the flow passage selector chamber 22 is selected from a tank side outgoing passage 23 to an extraction chamber side outgoing passage 24 or vice versa with a drive device 25. In addition, the drive device 25 sets the aforesaid flow passage so as to first open the tank side outgoing passage 23, and then the extraction chamber side outgoing passage 24 when water in the tank 11 rises the predetermined temperature. As a result, cold coffee is not brewed even in brewing a small amount of coffee.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electric coffee boiler that removes impurities such as limescale contained in tap water and extracts delicious and safe coffee. 2. Description of the Related Art In general, it is essential to use high-quality water with few impurities to extract delicious coffee, and electric coffee boilers are also required to have a water purifying function. In line with this demand, in a conventional electric coffee boiler, for example, as shown in FIG. 6, an activated carbon storage container 32 containing activated carbon for the purpose of removing limescale, trihalomethane, etc. is placed at the bottom of a tank 3L that stores water. has been established. Reference numeral 33 denotes a water riser pipe, which communicates with the tank 31 and whose upper end faces the extraction chamber 34 . 35
indicates a heating section, and 36 indicates a glass container. Problems to be Solved by the Invention However, in the conventional electric coffee boiler described above, the water that initially passes through the activated carbon storage container 32 from the tank 31 is transferred to the heating section 35.
After heating, the heated water passes through the boundary water pipe 33 and rises to the extraction chamber 34.
When dripping is started, the cold water that had previously entered the water riser pipe 33 will be supplied as is to the extraction chamber 34.

For this reason, there was a problem in that only cold water remained in the glass container 36, especially when the amount of coffee extracted 1 was small. Furthermore, the problem of bacterial growth inside the water purifier has been pointed out in ordinary household water purifiers, but there is also the problem that sufficient sterilization cannot be achieved with the above-mentioned coffee boiler when brewing a small amount. In addition, if the amount of activated carbon is increased to improve the ability to remove germs, the above coffee boiler will become drip l14.
Because of the structure, the activated carbon storage container 32 creates flow path resistance, making it difficult to obtain stable drip performance, and there are also problems such as clogging and other problems resulting from repeated use, resulting in extreme instability.

The purpose of the present invention is to solve the above problems, and even when extracting a small amount of coffee, it is possible to extract delicious and safe coffee by removing impurities such as limescale contained in tap water without having to extract it cold. It provides an electric coffee brewer. Means for Solving the Problem In order to achieve the above-mentioned object, the present invention provides a tank for accommodating water and equipped with an activated carbon storage container near the upper end opening, a heating section for heating the water in the tank, an extraction chamber for extracting coffee; a water riser pipe having one end communicating with the bottom of the tank via a check valve and the other end facing a flow path switching chamber;
and a drive device for switching the flow path of the flow path switching chamber to either the tank side outflow path or the extraction chamber side outflow path, and the drive device is configured to initially open the tank side outflow path. The electric coffee boiler switches the extraction chamber side outflow path to the open side when the water in the tank reaches a predetermined temperature.

Function The present invention has an activated carbon storage container installed near the upper end opening of a tank containing water, and the other end of the water riser pipe, which communicates with the bottom of the tank via a check valve, faces the flow path switching chamber. Since a drive device is provided to switch the outflow path of this flow path switching chamber, if the flow path of the flow path switching chamber is initially set to the tank side outflow path by the drive device, the extraction chamber side outflow path will be blocked. The water contained in the water riser pipe flows out to the tank side outlet. When the water in the tank is heated by the heating section, it is pushed up to the flow path switching chamber through the riser pipe, passes through the activated carbon storage container from the tank side outflow path, and returns to the tank again, whereupon it circulates through the flow path. The water in the tank will now be preheated. Furthermore, when the preheated water in the tank reaches a predetermined temperature, the drive device switches the flow path of the flow path switching chamber to the extraction chamber side outflow path, and the preheated water boils at a higher temperature in the heating section. After that, it is discharged into the extraction chamber. EXAMPLE An example of the present invention will be described below with reference to FIGS. 1 to 5.

1 is the extraction chamber for extracting coffee, and the coffee storage section 2
It is placed on the upper part of the eaves part 3, and is slidably attached to the lower surface of the eaves part 3 in a removable manner.

The electric coffee boiler main body 4 has a second
As shown in the figure, a cutter 6 as a crushing body driven by a motor 5 is installed inside. 7 is a coffee bean grinding chamber equipped with a filter 8. 9 is a coffee bean storage, which is integrally formed and communicates with the coffee bean grinding chamber 7 at the bottom. Furthermore, a discharge port 10 for discharging thirst is arranged at the top of the coffee bean storage 9. 1) is a tank for storing water, and as shown in Fig. 3, it is configured to be detachable from the side of the electric coffee boiler main body 4, and the bottom part is connected to the electric coffee boiler main body 4 through a valve l2. It communicates with the provided sensing chamber l3. A thermostat 14 and a reverse valve I5 are attached to the bottom of the sensing chamber 13.
Near the upper end opening l6 of the tank 1), there is a mesh filter on the upper and lower surfaces! An activated carbon storage container 18 covered with 7 is attached. +9 is a heater that heats water introduced from the tank 1) in a heating section 20 and pushes the hot water up through a water riser pipe 21 into a flow path switching chamber 22.

The flow path switching chamber 22 is configured as a one-way valve as shown in FIG. The hot water is released into either the tank-side outflow path 23 or the coffee bean storage side outflow path 24 serving as the extraction chamber-side outflow path using spring force bias. The drive device 25 also includes a time switch 26 and a timer motor 27 provided therein for timed operation.
A cam 29 is attached to a main shaft 28 for setting a time limit in the time switch 26, and an operating rod 3l is driven via an arm 30 in conjunction with the time limit operation to switch the flow path in the flow path switching chamber 22. It has become. Also, the time switch 26 connects the main power to the heater 19 as shown in the electrical circuit of FIG.
A switch S. which selectively switches between the circuit of the timer motor 27 and the motor 5. , S. , a switch S interposed in the circuit of the timer motor 27, and a switch S interposed in the circuit of the motor 5 are built in. In addition, the circuit of the heater 19 and the circuit of the timer motor 27 and motor 5 are connected to the sensing chamber 1 which turns on when the temperature reaches a predetermined temperature.
They are connected through three thermostats 14. In the above configuration, after putting coffee beans into the coffee bean storage 9, putting water into the tank 1), setting the brewing chamber 1, and setting the time switch 26 to a predetermined time, when the time switch 26 is activated. , switch S. is closed and the motor 5 starts to drive, and the timer motor 27 starts a timed operation. At this time, the flow path switching chamber 22
The tank side outflow passage 23 is open. After the coffee beans are sequentially ground and discharged from the filter 7 into the extraction chamber 1, the switch S0 is switched to the switch Sea, and the operation of the motor 5 and the timer motor 27 is stopped. At the same time, power supply to the heater 19 is started. The water in the tank 1 is heated to about 90°C, and the water riser pipe 21
It is pushed up to the flow path switching chamber 22 via. At this time, since the tank side outflow passage 23 is open as described above,
The pushed up hot water passes through the activated carbon storage container I8 from the tank side outflow path 23 and is returned to the tank gate. When the water temperature in the tank II reaches a predetermined temperature of approximately 60° C., the thermostat 14 is turned on, and energization of the motor 5 and the timer motor 27 is started again. By the operation of the timer motor 27, the cam 29 moves the operating rod 31 and switches the flow path opening of the flow path switching chamber 22 to the extraction chamber side outflow path 24. Therefore, the preheated hot water is returned to the heater 19.
The coffee beans are boiled at a high temperature and discharged into the coffee bean storage 9, and then diffused by the motor 5 toward the wall of the coffee bean storage 9, inside the coffee bean storage 9, inside the coffee bean grinding chamber 8,
Clean the particulates attached to the filter 7 surface. After a predetermined period of time, the time switch 26 opens the switch Ss and the motor 5 is stopped. Thereafter, the timer motor 27 continues its timed operation, and the cam 29 moves further to switch the flow path of the flow path switching chamber 22 to the tank side outflow path 23 again. For this reason, the discharge from the extraction chamber side outflow passage 24 is stopped, and the smearing after the primary hot water supply in the coffee extraction procedure is performed for a certain period of time. Further, by the movement of the cam 29, hot water is discharged into the extraction chamber side outlet passage 24 again, and full-scale secondary hot water supply to the extraction chamber l is started, and at the same time, the switch S is opened and the timed operation of the timer motor 27 is also terminated. Coffee extraction continues after that, and when all the water in the tank 1) is discharged, the thermostat 14 turns on the heater! 9 is controlled intermittently to keep it warm.

As mentioned above, in this embodiment, once heated water is returned to the tank 1) through the activated carbon storage container 18, so even if the activated carbon has bacteria attached to it, it can be sterilized by heating. The decomposition ability of free chlorine can be increased due to the catalytic effect. Therefore, a sufficient removal effect can be obtained with a small amount of activated carbon. Also, a tank! Since there is no activated carbon storage container 18 in the flow path from 1 to the extraction chamber 1, there is no flow path resistance and stable drip performance can be obtained. Effects of the Invention The present invention provides a flow path switching chamber for switching the water flow path via the drive device as described above, and a water riser pipe with the other end facing this flow path switching chamber. If the flow path of the switching chamber is set to the tank side outflow path, the water in the tank will be pushed up to the flow path switching chamber via the riser pipe as it is heated.
It is possible to circulate the flow path from the tank side outflow path back to the tank. At this time, an activated carbon storage container is installed near the top opening of the tank, so the water being circulated is always treated by this activated carbon. Therefore, the cold water filled in the water riser pipe is no longer directly discharged into the extraction chamber without passing through the heating section as in the conventional case. Furthermore, when the water in the tank reaches a predetermined temperature, the driving device switches the flow path of the flow path switching chamber from the tank side outflow path to the extraction chamber side outflow path, so that the preheated water is reheated in the heating section. It is boiled at a high temperature and then discharged into the extraction chamber. Therefore, even when brewing a small amount of coffee, it is now possible to always dispense boiling water without discharging cold water. Furthermore, since the preheated water passes through the activated carbon storage container and returns to the tank, the bacteria removal effect of the activated carbon can be enhanced, and there is no flow path resistance when the water is discharged into the extraction chamber. Therefore, stable drip performance can be obtained, allowing safe and delicious coffee extraction.

[Brief explanation of drawings]

Fig. 1 is an external perspective view showing one embodiment of the present invention, Fig. 2 is an enlarged vertical cross-sectional view showing the eaves, Fig. 3 is an enlarged sectional view of the main parts showing the tank and flow path, Fig. 4 5 is a partially enlarged sectional view showing the flow path switching chamber, FIG. 5 is an electric circuit diagram, and FIG. 6 is a longitudinal sectional view showing a conventional electric coffee brewer. l...extraction room! l...Tank 15...Check valve 6...Top opening 18...Activated carbon storage container 2
0... Heating section 21... Water pipe 22... Flow path switching chamber 23... Tank side outflow path 24... Extraction chamber side outflow path 25... Drive device

Claims (1)

[Claims] (1) A tank for accommodating water with an activated carbon storage container attached near the top opening, a heating section for heating the water in this tank, an extraction chamber for extracting coffee, and one end connected via a check valve. a water riser pipe that communicates with the bottom of the tank and has its other end facing the flow path switching chamber; and a drive that switches the flow path of the flow path switching chamber to either the tank side outflow path or the extraction chamber side outflow path. The drive device initially sets the flow path to open the tank side outflow path, and when the water in the tank reaches a predetermined temperature, switches the flow path to the side that opens the extraction chamber side outflow path. An electric coffee boiler characterized by: