JPH0662937U - Electric coffee kettle - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to obtain an electric coffee brewer capable of extracting a good quality coffee liquid by obtaining a hot water diffusion pattern suitable for the amount of coffee powder. [Structure] A plurality of heaters 26a, 26b for heating water guided from a water storage tank 21 are provided, and hot water supply pipes 67a, 67b for guiding the heated water to the heaters 26a, 26b are separately provided. A shower 12 is provided for diffusing the hot water ejected from the hot water supply tips of the hot water supply pipes 67a, 67b and allowing it to drip into the coffee powder. The shower 12 includes a plurality of shower chambers 12a and 12b, which are the same number as the hot water supply pipes 67a and 67b, independent from each other, and these chambers 12a and 12b.
The bottom wall 61 of the 12b has small holes 64 and 65, respectively.
The shower 12 is arranged such that the hot water supply tips of the hot water supply pipes 67a, 67b are separately communicated with the shower rooms 12a, 12b. It is characterized by including a control unit 45 for setting the selective energization of the heaters 26a, 26b corresponding to the shower rooms 12a, 12b separately according to the amount of coffee powder used.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electric coffee brewing machine equipped with a shower for diffusing hot water ejected from a hot water supply passage and dripping it onto coffee powder.

[0002]

[Prior art]

 An electric coffee brewer equipped with a shower can prevent the hot water supplied to the coffee powder placed below it from being intensively and intensively supplied to one location, and the hot water can be diffused and supplied.

By the way, a conventional electric coffee brewer of this kind is provided with only one system of a heater for heating water introduced from a water storage tank and a hot water supply passage for introducing hot water ejected from the heater, and the hot water supply of the hot water supply passage is provided. The shower arranged on the tip side also has a large number of small holes in the bottom wall of a single shower room, and the hot water spouted from the hot water supply passage is diffused according to the arrangement of the small holes, and It is a composition that is dropped onto coffee powder.

[0004]

[Problems to be solved by the device]

 As described above, conventionally, there is only one hot water supply system and one of the hot water diffusion patterns by the shower, and in general, the shower diameter is for extracting the coffee liquid for a small number of people. It is specified to be approximately halfway between the case of extracting coffee liquid for a large number of people.

Therefore, when the amount of coffee powder stored together with the disposable paper filter in the filter cup arranged below the shower is for a small number of people, the diameter formed by the upper surface of the coffee powder at that time is formed. Is too small for the diffusion pattern of the shower, and as a result, hot water drips onto the area other than the coffee grounds, and that portion does not contribute to the diffusion of coffee grounds in the paper filter. It is difficult to extract a good coffee liquid.

Further, when the amount of coffee powder is for a large number of people, the diameter formed by the upper surface of the coffee powder at that time is too large for the diffusion pattern of the shower, and as a result, the coffee powder It is difficult to extract a good quality coffee liquid, because some of it does not get hot and it is impossible to evenly add hot water to the entire coffee powder. An object of the present invention is to obtain an electric coffee brewer capable of extracting high-quality coffee liquid by obtaining a hot water diffusion pattern suitable for the amount of coffee powder.

[0007]

[Means for Solving the Problems]

 According to the present invention, a water storage tank, a heater for heating water introduced from the tank, a hot water supply passage for introducing heated water, and hot water ejected from the hot water supply tip of the hot water supply passage are diffused to pass through the coffee. Applied to electric coffee brewers with shower dripping into powder.

In order to achieve the above object, a plurality of heaters are provided, the hot water supply passages are separately provided for the plurality of heaters, and the showers are independent of the same number as the hot water supply passages. A plurality of shower chambers and small holes respectively provided on the bottom walls of the shower chambers, and the shower heads of the hot water supply passages are separately communicated with the shower chambers to separate the shower chambers. A control unit is provided which sets the selective energization to the plurality of heaters which are arranged and individually correspond to the plurality of shower chambers according to the usage amount of the coffee grounds.

[0009]

[Action]

 In the above structure, each heater to which water is respectively led from the water storage tank heats the water by its heat generation operation to bring it to a boil. Dedicated hot water supply paths for these heaters lead the hot water heated by the heaters to the shower. Hot water is jetted out from the hot water supply tip of each hot water supply passage that individually communicates with these shower rooms, and each shower room drops the hot water into the coffee powder below through a small hole in its bottom wall. . Further, the control unit selects at least one of the heaters corresponding to the designation of the amount of coffee powder, in other words, the extraction amount of coffee liquid, and energizes the heater.

Therefore, the electric coffee brewer of the present invention comprises a plurality of hot water supply systems, and by selecting at least one of these hot water supply systems, the hot water diffusion pattern through the small holes of one shower room of the shower, or the above It is possible to select one of the hot water diffusion patterns formed by combining the small holes of one shower room and at least one other shower room. Therefore, the coffee liquid can be extracted by obtaining a hot water diffusion pattern suitable for the amount of coffee grounds.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS.

2 to 5, reference numeral 1 denotes a main body of an electric coffee brewer according to an embodiment of the present invention, which is formed of a main body base 2, a main body head 3, and a main body portion 4 connecting them. The front portions of the main body base 2 and the main body head 3 face each other in the vertical direction.

As shown in FIG. 3, a metal bottle receiving plate 6 on which a bottle 5 for receiving the extracted coffee liquid is detachably placed is attached to the upper surface of the front part of the main body base 2, and a bottle is attached. A filter cup 7 is detachably mounted on the surface 5. A disposable paper filter A (see FIG. 1) is stored in the filter cup 7, and coffee powder is stored in the filter A. A heat insulation heater 8 is attached to the lower surface of the bottle receiving plate 6 in close contact with it. In FIG. 3, reference numeral 9 is a heat shield plate, and 10 is an electromagnetic water supply valve that maintains a closed state in a non-power-conducting state, and these are all built in the main body base 2. The inlet of the water supply valve 10 is connected to a water source (water supply) not shown.

As shown in FIG. 3, the main body head 3 has a shower mount 11 on the lower surface thereof. A shower holder 11a is provided at the center of the mounting body 11, and a shower 12 arranged directly above the filter cup 7 is detachably attached to the shower holder 11a. A shower lid 13 having a pair of hot water supply pipe connecting cylinder portions 13a (only one of which is shown in FIG. 3) is attached to the shower mount 11. The shower lid 13 is provided so as to close the opening of the upper surface of the shower 12, and one of the hot water supply pipe connecting cylinder portions 13a thereof faces the central portion of the shower 12 and penetrates the shower mounting body 11 upward, and the other of the drawings is shown. The hot water supply pipe connecting cylinder portion 13a that penetrates the shower mounting body 11 is located at a position displaced from the central portion of the shower 12.

As shown in FIGS. 8 and 9, the shower 12 has a relatively shallow dish shape with an open upper surface, and a circular partition wall 62 that stands upright from the bottom wall 61 is provided inside the shower 12. ing. The circular outer peripheral wall 63 and the partition wall 62 of the shower 12 are concentrically provided. The shower 12 has a first shower chamber 12a which is a space inside the partition wall 62 and a second shower chamber 12b which is a space between the partition wall 62 and the outer peripheral wall 63.

The one hot water supply pipe connecting cylinder portion 13a is opposed to the first shower chamber 12a at the center, and the other hot water supply pipe connection not shown is provided to the second shower chamber 12b surrounding the shower chamber 12a. The tubular portion 13a is opposed. Furthermore, the bottom wall 61 of the shower 12 has a large number of small holes 64 communicating with the inside and outside of the first shower chamber 12a, and a large number of small holes 65 communicating with the inside and outside of the second shower chamber 12b. It is open.

Horizontal rib-shaped locking projections 66 are provided at three locations on the outer circumferential surface of the outer circumferential wall 63 at intervals along the circumferential direction. These locking projections 66 are inserted into the space E between the shower holders 11a as shown in FIG. 8, and then the shower 12 is rotated in the direction of the arrow in FIG. It is designed to be hung up and removed in the reverse order.

As shown in FIG. 3, a water supply tank 14 is built in the front side of the upper part of the main body head 3, and a water supply filter 15 is inserted into this tank 14 through an opening of its upper surface. A tank lid 16 that opens and closes an upper surface opening of a water supply tank 14 is rotatably attached to a top plate 3 a of the main body head 3 via a hinge 17.

A metal bottle support plate 18 exposed on the top plate 3a of the head 3 is attached to the upper rear side of the main body head 3, and the lower surface of the support plate 18 is closely contacted with the heat retention heater. The switch 19 is attached. The bottle 5 and the cup are placed on the bottle receiving plate 18. In addition, 20 in FIG. 3 is a heat shield plate.

As shown in FIG. 3, a vertically long water storage tank 21 is stored in the upper portion of the main body 1. The tank 21 is arranged below the water supply tank 14 and is connected to the outlet of the water supply valve 10 via a water supply pipe 22. The supply port 21 a formed in the upper part of the water storage tank 21 is connected to the outlet of the water supply tank 14 via a water supply pipe 23.

As shown in FIGS. 3 to 5, the water storage tank 21 has a first connecting pipe 24 a and a second connecting pipe 24 b extending downward from its lower portion. One end portion 25a of a first hot water supply pipe 67a and a second hot water supply pipe 67b that form a hot water supply passage are separately connected to these both connection pipes 24a and 24b. The other end portions 25b of the hot water supply pipes 67a and 67b are fitted inside the pair of hot water supply pipe connection portions 13a and are separately connected to each other. Therefore, the first hot water supply pipe 67a communicates with the first shower chamber 12a, and the second hot water supply pipe 67b communicates with the second shower chamber 12b.

A first heater 26a and a second heater 26b located below the water storage tank 21 are separately attached to intermediate portions of the first and second hot water supply pipes 67a and 67b. These heaters 26a and 26b have the same structure, and are formed by closing the bottom surface opening of a boiler container 68 made by casting sheath heater in aluminum die casting with a metal bottom plate 69. Moreover, for example, a sheath heater having a power consumption of 800 watts is cast in the first heater 26a, and a sheath heater having a power consumption of 1200 watts is cast in the second heater 26b.

The first and second connecting pipes 24a and 24b are provided with first and second pressure switches 27a and 27b for preventing the corresponding first and second heaters 26a and 26b from being idle. Backflow prevention means (not shown) for preventing backflow from the heaters 26a and 26b toward the water storage tank 21 is provided separately.

A screw shaft 28 is vertically provided to penetrate the upper wall of the water storage tank 21, and an upper end portion of the screw shaft 28 is arranged in a forward and reverse direction close to and above the water storage tank 21. It is connected to a rotatable motor 29. A sensor mounting base 30 is screwed onto a screw shaft 28 rotated by a motor 29.

As shown in FIG. 6, the sensor mounting base 30 has a pair of rib-shaped sliding protrusions 30 a extending in the axial direction thereof, which are erected in the water storage tank 21. A guide pillar 31 having a U-shaped lateral cross section is slidably fitted and prevented from rotating. Thereby, the sensor mounting base 30 is moved in the axial direction of the shaft 28 as the screw shaft 28 rotates. The screw shaft 28, the motor 29, the sensor mounting base 30, and the guide column 31 form a sensor displacement mechanism 32.

As shown in FIG. 6 and the like, an electrode-type movable water level sensor 33 is attached to the peripheral surface of the sensor attachment base 30. Reference numeral 34 is a signal line for guiding the detection information of the movable water level sensor 33, and is formed in a spiral shape so as to allow the vertical movement of the movable water level sensor 33. Further, a magnet mounting portion 30b extending in the axial direction of the base 30 is provided at a position 180 ° away from the movable water level sensor 33 on the peripheral surface of the sensor mounting base 30, and a rod-shaped magnet 35 is embedded in this portion. ing.

The magnet mounting portion 30b is close to the inner surface of the one side wall 21a of the water storage tank 21, and the outer surface of the one side wall 21a has a magnetically sensitive element such as a reed switch as shown in FIGS. An upper limit switch 36 and a lower limit switch 37 each consisting of are attached. The upper limit switch 36 is used to obtain information that regulates the upper limit position when the movable water level sensor 33 rises, and the lower limit switch 37 is used to obtain information that regulates the lower limit position when the movable water level sensor 33 is lowered.

As shown in FIG. 3, the water tank 21 is provided with a full water sensor. This sensor is composed of a + electrode 38 penetrating in an insulating state on the upper wall of the water storage tank 21 and a-electrode 39 penetrating in an insulating state on the lower wall of the water storage tank 21, and both electrodes are formed. 38 and 39 are used to obtain information for opening and closing the water supply valve 10. The upper limit switch 36 is installed above the water level at the time of full water determined by the + electrode 38.

Further, as shown in FIG. 2, on the front wall of the main body head 3, a power switch 40, a start switch 41, a select switch 42, a water supply lamp 43, and an extraction lamp 44 which are operated and visually recognized from the front side thereof. Are installed respectively. The dial-type select switch 42 serves as a hot water supply amount specifying means, and has a plurality of hot water supply amounts corresponding to an integral multiple of the reference hot water supply amount (one cup of coffee), in this embodiment, four and six cups of coffee. , 8 cups, 10 cups and 12 cups can be specified respectively. A control unit 45 composed of a microcomputer is provided in the main body head 3.

As shown in FIG. 10, various input ports of the control unit 45 include a movable water level sensor 33, + electrodes 38 and − electrodes 39 forming a full water sensor, a start switch 41, a select switch 42, and upper and lower limit switches. 36, 37, the first and second pressure switches 27a, 27b, etc. are connected respectively. Further, the water supply valve 10, the motor 29, the water supply lamp 43, the extraction switch 44, the first relay 70, the second relay 71, and the like are connected to various output ports of the control unit 45.

Reference numeral 47 in FIG. 10 denotes a commercial AC power supply, which includes a series circuit of the first heater 26a and the first relay switch 70a via the power switch 40, the second heater 26b, and the second heater 26b. The series circuit with the relay switch 71a is connected in parallel. The first relay switch 70a, which is a normally open contact, is opened and closed by the first relay 70, and the second relay switch 71a, which is also a normally open contact, is opened and closed by the second relay 71. The connection point between the power switch 40 and the first heater 26a and the connection point between the first relay switch 70a and the commercial AC power supply 47 are connected to the primary side of the step-down transformer 48. The secondary side of the transformer 48 is connected to the power input port of the control unit 45.

The control unit 45 selectively selectively energizes the first and second heaters 26a and 26b corresponding to the first and second shower chambers 12a and 12b, respectively, to extract the amount of coffee powder used, that is, to extract coffee. The heater energization control means 45a is set according to the amount of liquid.

More specifically, the heater energization control means 45a determines whether or not the select switch 42 has designated the extraction amount of 12 to 8 cups in step 31, for example, as shown in FIG. If the determination is YES, energization control for turning on the second heater 26b is performed in the next step 32, and then energization control for turning on the first heater 26a is performed in the next step 33. If the determination in step 31 is NO, the process proceeds to step 34. In this step 34, it is judged whether or not the select switch 42 has designated the extraction amount of 6 cups or less, and if the judgment is YES, the process proceeds to step 33 to perform energization control for turning on the first heater 26a. . If the determination in step 34 is NO, the process returns to step 31.

As described above, the heater energization control means 45 a configured by steps 31 to 34 corresponds to the designated value of the extraction amount by the select switch 42, and the amount of the extracted coffee liquid is 12 to 8 cups. In this case, both the first and second heaters 26a and 26b are energized, and when the amount of extracted coffee liquid is 6 cups or less, only the first heater 26a is energized.

The control unit 45 also includes hot water supply amount control means. This control means operates the sensor displacement mechanism 32 based on the designation of the hot water supply amount by the select switch 42 to designate the movable water level sensor 33 with respect to the origin water level G (see FIG. 1) which is the water surface in the water storage tank 21. The hot water supply amount control means is lowered to a height position H (see FIG. 1) corresponding to the supplied hot water supply amount. Next, the configuration of the hot water supply amount control means will be described with reference to the flowchart of FIG. FIG. 10 is a flowchart showing hot water supply control by the control unit 45.

When it is determined in step 1 that the power switch 40 of the electric coffee brewer is turned on, the control unit 45 determines whether the lower limit switch 37 is turned on (step 2), and the determination is made. If YES, the water supply lamp 43 is turned on (continuous lighting) (step 3), and then the closed water supply valve 10 is turned on (step 4). Then, the water supply valve 10 is opened and the water from the water source is guided to the water storage tank 21 through the water supply pipe 22.

Further, the control unit 45 judges whether or not the water storage tank 21 is full based on the information from the water filling sensors 38 and 39 (step 5), and if the judgment is NO, the above-mentioned step 3 , 4 is repeated. Then, when the water surface in the water storage tank 21 reaches the + electrode 38, the determination in step 5 becomes YES, so the control unit 45 turns off the water supply valve 10 and closes it (step 6), and then turns on the water supply lamp 43. Turn it off and turn it off (step 7).

After that, the control unit 45, based on the information from the movable water level sensor 33, determines whether or not the sensor 33 detects the water in the water storage tank 21, in other words, the movable water level sensor 33. It is judged whether or not it is underwater (step 8). If this determination is YES, the control unit 45 operates the sensor displacement mechanism 32. That is, the motor 29 is reversed (step 9). Then, the reverse rotation of the screw shaft 28 raises the sensor mounting base 30 screwed to the screw shaft 28 along the axial direction of the screw shaft 28. Therefore, the movable water level sensor 33 supported by the sensor mounting base 30 is also moved. Moved up.

Further, the control unit 45 determines whether or not the movable water level sensor 33, which is being raised in step 10, detects the water surface in the water storage tank 21, that is, the origin water level G, and if this determination is NO. Step 9 is repeated. Then, when the movable water level sensor 33 is moved to the height position where the origin water level G is detected, the control unit 45 turns off the motor 29 and stops the operation of the sensor displacement mechanism 32 by executing Step 11. At the same time, the movable water level sensor 33 is held at the origin position. Note that the initial origin water level G immediately after automatic water supply as described above is equal to the water level when the water is full, but the subsequent hot water supply operation gradually sets the origin water level G below the water level when the water is full.

Next, the control unit 45 determines whether or not the select switch 42 is turned on and the hot water supply amount (the number of cups of coffee liquid extracted) is designated (step 12), and if the determination is Y ES, The motor operating time corresponding to the hot water supply amount designated by the select switch 42 is set in the timer (step 13). It should be noted that the timer of the control unit 45 is preset with an initial set time corresponding to the minimum hot water supply amount (for example, four cups of coffee), and the motor operating time corresponding to the designated hot water supply amount is added to this set time. It is a rumo. After setting the timer in step 13 or when the determination in step 12 is NO, the control unit 45 determines whether or not the start switch 41 is turned on (step 14).

When this determination is YES, the control unit 45 causes the motor 29 of the sensor displacement mechanism 32 to rotate normally (step 15). Then, due to the normal rotation of the screw shaft 28, the sensor mounting base 30 screwed to the screw shaft 28 is lowered along the axial direction of the screw shaft 28. Therefore, the movable water level sensor 33 supported by the sensor mounting base 30 also moves downward. Moved to and submerged in water. After that, the control unit 45 determines whether or not the lower limit switch 37 is turned on (step 16), and if the determination is NO, determines whether or not the time set in the timer has elapsed. (Step 17). If the determination in step 16 is YES, the process returns to step 2. If the determination in step 17 is NO, steps 15 and 16 are repeated.

When the determination in step 17 is YES, the control unit 45 turns off the motor 29 (step 18) and stops the movable water level sensor 33 at the hot water supply level H below the origin water level G. . The above steps 8 to 18 constitute hot water supply amount control means. As described above, the amount of water between the hot water supply level H and the origin water level G at which the movable water level sensor 33 is stopped by the motor 29 being driven for the time D 2 set by the timer is designated by the select switch 42. It corresponds to the amount of hot water supplied.

Next, the control unit 45 turns on the extraction lamp 44 and lights it (step 19), and then performs step 20 (for details, steps 31 to 34 already described with reference to FIG. 12). When the amount of coffee liquid to be extracted is 12 to 8 cups, the first and second heaters 26a and 26b are both energized so that the amount of coffee liquid to be extracted is 6 cups. If it is less than a minute, only the first heater 26a is energized. Note that these energizations are performed by operating at least the first relay 70 of the first and second relays 70 and 71 and closing at least the first relay switch 70a. After that, the control unit 45 determines whether or not the movable water level sensor 33 detects the water surface in the water storage tank 21 (step 21), and if this determination is NO, steps 19 and 20 are repeated.

Since the temperature of the boiler container 68 included in at least the first heater 26a of the first and second heaters 26a and 26b energized in step 20 rises, the water storage tank 21 is connected to the first and second connections. The water introduced into the boiler container 68 through at least the first connecting pipe 24a of the pipes 24a and 24b is heated and boils. At each boiling, water (hot water) heated in the boiler container 68 is jetted into the shower 12 through at least the first hot water supply pipe 67a of the first and second hot water supply pipes 67a and 67b. Then, through at least the small hole 64 of the small holes 64, 65 of the shower 12, the coffee powder previously put in the filter cup 7 arranged below is poured. Therefore, the coffee liquid is extracted, the coffee liquid is received by the bottle 5, and the coffee liquid stored in the bottle 5 is kept warm by the heat generation of the warming heater 8.

Since the amount of water in the water storage tank 21 gradually decreases due to such a hot water supply operation, when the water level reaches the hot water supply water level H, the determination in step 21 becomes YES, so the control unit next. 45 turns off at least the first heater 26a of the energized heaters 26a and 26b to stop the hot water supply operation (step 22), and then turns off the extraction lamp 44 to complete the hot water supply, that is, coffee. The completion of the extraction of the liquid is notified (step 23). After that, the control unit 45 determines whether or not the power switch 40 is turned off (step 24). If this determination is YES, the process returns to step 1, and if NO, the process returns to step 2.

In this electric coffee brewer, in the above-mentioned extraction of the coffee liquid, when the extraction amount is 6 cups or less, only the first heater 26a of the two heaters 26a and 26b heats up and is boiled by this. Hot water is jetted into the first shower chamber 12a of the shower 12, diffused according to the size of the shower chamber 12a, and passes through only the through holes 64, so that a hot water diffusion pattern having a small area is formed. Dropped on the powder. At this time, the amount of coffee grounds in the filter cup 7 is small, and the diameter B of the upper surface of the coffee cup is slightly larger than the diameter of the first shower chamber 12a as shown in FIG. There is no inconvenience that the entire amount of the hot water that has passed through the through hole 64 is dropped onto the coffee powder without being aimed at and the hot water is splashed on the parts other than the coffee powder. Therefore, the coffee grounds are easily agitated, and good quality coffee liquid can be extracted.

Further, when the extraction amount is 8 to 12 cups, not only the first heater 26a but also the second heater 26b generate heat, so that the first heater 26a and the first hot water supply pipe 67a are provided. Hot water is supplied to the first shower room 12a by the first hot water supply system, while hot water is also supplied to the second shower room 12b by the second hot water supply system including the second heater 26b and the second hot water supply pipe 67b. At this time, since the hot water passes through the small holes 64 and 65 of the shower 12, the area of the diffusion pattern of the hot water from the shower 12 is large, and the amount of the coffee powder in the filter cup 7 is large, and the upper surface of the coffee cup forms the upper surface. Since the diameter C is about the same as the diameter of the second shower chamber 12b as shown in FIG. 1, the entire amount of hot water that has passed through the through holes 64 and 65 is dropped onto the coffee powder without aiming at it. For this reason, there is no inconvenience that some of the coffee grounds are not heated, and the coffee grounds are easily agitated, so that a good quality coffee liquid can be extracted.

Moreover, in the present embodiment, the wattage of the first heater 26a is made smaller than the wattage of the second heater 26b. Therefore, when the coffee liquid for a small number of people of 6 cups or less is extracted, the extraction speed can be slowed down because the boiling interval of the water in the first heater 26a is long, and therefore the extracted coffee liquid becomes thin. That tendency can be eliminated. In addition, when extracting 8 or more cups of coffee liquid for a large number of adults, since the boiling interval of water in the second heater 26b is short, the whole extraction speed can be increased, and therefore extraction is performed accordingly. The tendency of the coffee liquor to become too strong can be eliminated.

Moreover, in the electric coffee brewer of the present embodiment, after the origin water level (water level) G of the water storage tank 21 is detected by the one movable water level sensor 33 as described above, the movable water level sensor 33 is lowered. The hot water supply level H is lowered according to the designated hot water supply amount, and the hot water supply operation is performed until the water level drops to the hot water supply level H 2. The amount of water between the origin water level G and the hot water supply level H corresponds to the amount of hot water specified by the select switch 42. Therefore, a specified amount of hot water can be accurately supplied without being affected by variations in water temperature and heat generation characteristics of the heaters 26a and 26b, and water temperature correction and variations in power consumption of the heaters 26a and 26b can be corrected. In addition to being unnecessary, since the origin water level G and the hot water supply water level H are detected by the single movable water level sensor 33, an inexpensive electric coffee brewer having a simple structure can be obtained.

Further, in the configuration of the above-described embodiment, the full water sensor for controlling the opening / closing of the water supply valve 10 has at least the first heater 26a of both the heaters 26a and 26b turned off after the start switch 41 is turned on. It will not be operated until it is released. Further, when the hot water supply operation described above is repeated and the sensor mounting base 30 is gradually lowered, and the lower limit switch 37 is operated by the magnetic force of the magnet 35 attached thereto, the control unit 45 causes the water supply lamp 43 to blink. Let's let you know the water shortage. When the water amount is insufficient, the tank lid 16 is opened as necessary to supply water to the water supply tank 14, so that an appropriate amount of water can be supplied to the water storage tank 21 through the water supply pipe 23. In the case of manually supplying water in this way, steps 3 to 7 are not executed in the flowchart of FIG.

The present invention is not limited to the above embodiment. For example, although the hot water supply system has two systems and the shower room has two systems in the above-described embodiment, these may have three systems or more and three or more rooms.

[0052]

[Effect of device]

 As described above in detail, the electric coffee brewer of the present invention is provided with a plurality of hot water supply systems, and by selecting at least one of these systems, the diffusion pattern of the hot water of the shower can be changed. By selecting the hot water diffusion pattern, it is possible to obtain a hot water diffusion pattern that is suitable for the amount of coffee powder, and therefore it is possible to reduce the excess and deficiency of the hot water dripping range with respect to the coffee powder, and to extract good-quality coffee liquid.

[Brief description of drawings]

FIG. 1 is a diagram schematically showing the configuration of an electric coffee brewer according to an embodiment of the present invention.

FIG. 2 is a perspective view showing the configuration of the entire electric coffee brewer according to the embodiment.

FIG. 3 is a sectional view showing the configuration of the entire electric coffee brewer according to the embodiment.

FIG. 4 is a rear view showing a partial cross section of the configuration of the entire electric coffee brewer according to the embodiment.

FIG. 5 is a plan view showing the overall configuration of the electric coffee brewing machine according to the embodiment with the top plate removed.

FIG. 6 is a perspective view showing a configuration of a sensor displacement mechanism according to the embodiment.

FIG. 7 is a sectional view showing the relationship between the sensor displacement mechanism and the lower limit switch according to the embodiment.

FIG. 8 is a plan view showing the configuration of the shower according to the embodiment.

FIG. 9 is a cross-sectional view showing the configuration of the shower according to the embodiment.

FIG. 10 is a diagram showing a configuration of an electric circuit of the electric coffee brewer according to the embodiment.

FIG. 11 is a flowchart showing hot water supply control by the control unit according to the embodiment.

FIG. 12 is a flowchart showing heater energization control by the control unit according to the embodiment.

[Explanation of symbols]

12 ... Shower, 12a ... 1st shower room, 12b ... 2nd shower room, 21 ... Water tank, 24a ... 1st connection pipe, 24b ... 2nd connection pipe, 26a ... 1st heater, 26b
... second heater, 45 ... control section, 45a ... heater energization control means, 61 ... bottom wall, 62 ... partition wall, 63 ... outer peripheral wall, 6
4, 65 ... Small holes, 67a ... First hot water supply pipe (first hot water supply passage),
67b ... Second hot water supply pipe (second hot water supply passage).

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Mitsuo Hasegawa 1663, Onuma, Souma-machi, Sarushima-gun, Ibaraki Kanazawa Industrial Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A water storage tank, a heater for heating water introduced from the tank, and a hot water supply passage for introducing heated water.
In an electric coffee brewer including a shower for diffusing hot water ejected from the hot water supply tip of this hot water supply passage and dripping it onto coffee grounds, a plurality of the heaters are provided, and the hot water supply passage is provided for these heaters Each of the shower chambers is provided separately, and each of the shower chambers has the same number of independent shower chambers as the hot water supply passages and the small holes provided in the bottom wall of each of the shower chambers. The showers are arranged such that the hot water supply tip portions of the hot water supply passages are separately communicated with each other, and the plurality of heaters respectively corresponding to the plurality of shower chambers are selectively energized to selectively use the coffee powder consumption amount. An electric coffee brewer characterized by having a control unit which is set according to.