JP2737319B2 - Electric coffee kettle - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric coffee machine that removes impurities such as lime contained in tap water and the like to extract delicious and safe coffee.

2. Description of the Related Art In general, in coffee extraction, it is essential to use high-quality water with few impurities, and a function of purifying water with an electric coffee heater has been demanded. For this reason, there is a conventional electric coffee kettle in which a container 35 containing activated carbon for the purpose of removing calcium and trihalomethane is provided at the bottom of a water tank, for example, as shown in FIG.

Problems to be Solved by the Invention In the above-mentioned conventional electric coffee machine, in the case where the activated carbon storage container 35 is provided at the bottom of the water tank 36 as shown in FIG. Water is less likely to pass through the activated carbon storage container when the activated carbon is not wet. In other words, the activated carbon storage container becomes a flow path resistance of water, which has been a cause of preventing the water in the tank from flowing smoothly to the heating unit during coffee extraction. Also, due to the water-repellent properties of activated carbon, a specific channel is formed in the activated carbon layer,
Water flowed through only a specific flow path as it was, and even at the time when the extraction was completed, the water did not uniformly pass through the activated carbon, and the ability to remove calcium and the like was poor.

When water is further poured into the tank, the water that has passed through the activated carbon storage container passes through the heating section and fills the riser pipe 37, and when the drip starts, the water in the extraction chamber remains unheated when the drip is started.
Feed to 38 for coffee extraction. In general, it has been pointed out that a general household water purifier or the like has a problem of propagation of various bacteria in the water purifier. Similarly, there is a problem that even this type of coffee stove cannot sufficiently sterilize by heating.

In view of the above problems, an object of the present invention is to provide an electric coffee brewer that removes impurities such as lime contained in tap water and can extract delicious and safe coffee.

Means for Solving the Problems A tank for storing water, which is provided with an activated carbon storage container in which the upper and lower surfaces of the activated carbon are covered by a net and further provided on the upper water injection surface side with ribs for dividing the water injection surface into multiple numbers. One end is connected to the bottom of the tank via a check valve, and the other end is switched to either the upper opening side of the tank or the brewing chamber side. A riser pipe facing a possible flow switching chamber, and a drive for sensing the water temperature when the water temperature in the tank reaches a predetermined temperature and switching the flow path of the flow switching chamber from the tank side to the extraction chamber side. And an apparatus.

Action According to the above configuration, impurities contained in tap water can be removed with a small amount of activated carbon, and safe and delicious coffee can be extracted without impairing drip performance.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to FIGS. First, in FIG. 1, reference numeral 1 denotes an extraction chamber arranged above the storage section 2, which is slidably attached to the lower surface of the eaves section 3 so as to be removable.

As shown in FIG. 2, a cutter 6 as a pulverized body driven by a motor 5 is provided in the eaves 3 at the upper part of the main body 4 and communicates with the pulverization chamber 8 at the bottom to form coffee beans integrally formed. A storage 9 is provided. A discharge port 10 for spouting hot water is arranged above the coffee bean storage 9.

In FIG. 3, reference numeral 11 denotes a water tank for storing water. The water tank is detachable from the side of the main body 4 and has a bottom communicating with a sensing chamber 13 provided in the main body 4 via a valve 12. A thermostat 14 and a check valve 15 are attached to the bottom of the sensing chamber 13.
An activated carbon storage container 17 is provided at the upper end 16 of the tank 11.
FIG. 4 shows the upper and lower surfaces of the activated carbon storage container 17 and a partially enlarged cross-sectional projection view. 18 and 19 are activated carbon storage containers 1 each
7 shows the water injection surface and the flowing water surface. 33 is the water injection surface 1
It is a rib provided to divide 8 into three.

Reference numeral 20 denotes a heater, which heats water introduced from the tank 11 by the heating unit 21 and pushes up the hot water to the flow switching chamber 23 through the water rising pipe 22.

The flow path switching chamber 23 has a one-way valve configuration as shown in FIG. 5, and presses the hot water from the riser pipe 22 to one of the tank-side outflow path 24 and the coffee bean storage outflow path 25 with a spring force. It is designed to be opened using. The driving device 32
It has the following structure. Reference numeral 26 denotes a time switch, which includes a timer motor 27 and a main power supply shown in FIG.
Switches S1a and S1b for selectively switching between the circuit and the timer motor 27 and the motor 5 circuit, a switch S2 interposed in the timer motor 27 circuit, and a switch S3 interposed in the motor 5 circuit are incorporated. In addition, heater 20
The circuit, the timer motor 27 and the motor 5 circuit are turned on when a predetermined temperature is reached, and are connected via a thermostat 14 arranged in the sensing chamber 13. Further, the time switch 26 shown in FIG. 5 has a cam 29 mounted on a time setting spindle 28, and drives an operating rod 31 via an arm 30 in conjunction with the time operation.
The flow path of the flow rate switching chamber 23 is switched.

In the above configuration, the coffee beans are put in the storage 9, the water is put in the tank 11, the extraction chamber 1 is set in the main body 4, the time switch 26 is set to a predetermined time, and the time switch 26 is operated. Switch S1b is closed and the motor 5 starts to drive, and the timer motor 27
Starts timed operation. The flow rate switching chamber 23 is
The side outflow channel 24 is open. The coffee beans are crushed sequentially, and after the discharge from the filter 7 to the extraction chamber 1 is completed,
The switch S1b is switched to the switch S1a, and the operation of the motor 5 and the timer motor 27 is stopped, and at the same time, the power supply to the heater 20 is started. The water in the tank 11 is heated to about 90 degrees and is jetted from the tank-side outflow passage 24 to the water injection surface 18 of the activated carbon storage container 17. At this time, since the ribs 33 are provided, the water jetted from the tank-side outflow passage 24 is dispersed on the water injection surface 18. Then, the water passes through the activated carbon container 17 and is returned from the flowing water surface 19 into the tank 11 again. When the water temperature in the tank 11 reaches a predetermined temperature of about 60 degrees, the thermostat 14 is turned on, and the 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 to switch the flow path opening of the flow path switching chamber 23 to the coffee bean extractor 9 side. Therefore, the preheated hot water is again boiled at a high temperature by the heater 20 and discharged to the storage 9, and is diffused by the motor 5 toward the side of the storage 9, and is spread to the inside of the storage 9, the inside of the crushing chamber 8, and the filter 7. Wash the attached fine powder. After a predetermined time, the switch 5 of the motor 5 is opened by the time switch 26 and stopped. After that, the timer motor 27 continues the timed operation, the cam 29 further moves, and the flow path of the flow path switching chamber 23 is again moved to the tank side.
It is opened to 11 and the discharge to the storage 9 side is stopped, and the variability 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, the water is again discharged to the storage 9 side, the secondary hot water supply to the extraction chamber 1 is started, the switch S3 is opened, and the timer motor 27 ends the timed operation. The extraction of coffee is continued thereafter, and when all the water in the tank 11 is discharged, the thermostat 34 controls the power supply to the heater 20 intermittently to maintain the warm state.

As described above, in the present embodiment, since there is no activated carbon container 17 in the main body flow path, flow path resistance does not occur and stable drip performance can be obtained. In addition, the formation of a specific flow path in the activated carbon layer due to the water-repellent properties of the activated carbon makes it possible to supply water while sprinkling water through the ribs 33 to thereby activate the activated carbon storage container.
17 can be evenly passed.

Furthermore, since the water once heated passes through the activated carbon storage container 17, even if various bacteria and the like adhere to the activated carbon, it can be sterilized by heating.

Effect of the Invention As described above, the present invention provides a tank for storing water provided with an activated carbon storage container provided with a rib covering the upper and lower sides of the activated carbon with a mesh and further having a rib for dividing the water injection surface into a plurality of sections on the upper water injection surface side. And a heating unit for heating water in the tank, an extraction chamber for extracting coffee, and one end connected to the bottom of the tank via a check valve and the other end connected to either the upper end opening of the tank or the extraction chamber. A riser pipe facing a flow path switching chamber that can be switched to, and when the water temperature in the tank reaches a predetermined temperature, the water temperature is sensed and the flow path of the flow path switching chamber is moved from the tank side to the extraction chamber side. By employing a configuration having a drive device for switching, impurities contained in tap water can be removed with activated carbon, and germs generated in activated carbon can be sterilized with circulating hot water to obtain safe coffee.

Further, by supplying water while sprinkling water to the activated carbon storage container 17, the activated carbon can be uniformly passed to improve the performance of removing lime and the like, and a delicious coffee can be extracted without impairing the drip performance.

[Brief description of the drawings]

FIG. 1 is a perspective view of one embodiment of the present invention, FIG. 2 is a longitudinal sectional view thereof, FIG. 3 is a sectional view of an essential part of the tank and the flow path, FIG. Top view, b is a perspective view, c
FIG. 5 is a bottom view, FIG. 5 is a partial sectional view of the flow rate switching chamber, and FIG.
FIG. 7 is an electric circuit diagram, and FIG. 7 is a longitudinal sectional view of a conventional electric coffee machine. 1 ... extraction chamber, 11 ... tank, 15 ... check valve, 16 ... upper end opening, 17 ... activated carbon storage container, 18 ... water injection surface, 21 ...
... Heating section, 23 ... Flow rate switching chamber, 32 ... Drive device, 33
…… Rib, 36 …… Activated carbon storage container.

Claims (1)

(57) [Claims] 1. A tank for storing water provided with an activated carbon storage container provided with a rib covering upper and lower sides of activated carbon with a mesh and further provided on an upper water injection surface side with ribs for dividing the water injection surface into multiple numbers. A heating section for heating water and an extraction chamber for extracting coffee, one end of which is connected to the bottom of the tank via a check valve and the other end of which can be switched to either the upper opening side of the tank or the extraction chamber side. A water rising pipe facing the flow path switching chamber, and a drive device for sensing the water temperature when the water temperature in the tank reaches a predetermined temperature and switching the flow path of the flow path switching chamber from the tank side to the extraction chamber side. An electric coffee kettle with a.