CN107788845B

CN107788845B - Coffee machine

Info

Publication number: CN107788845B
Application number: CN201710771345.0A
Authority: CN
Inventors: 吉田胜彦; 金子收
Original assignee: Twinbird Corp
Current assignee: Twinbird Corp
Priority date: 2016-09-01
Filing date: 2017-08-28
Publication date: 2022-01-21
Anticipated expiration: 2037-08-28
Also published as: CN107788845A; JP2018033772A; JP6791685B2

Abstract

The utility model provides a coffee machine which has a simple structure and can extract high-quality coffee liquid. A coffee machine (1) for injecting hot water into coffee grounds (111) in a filter cup (23) is provided with a plurality of nozzles (37, 37A) for injecting hot water into the coffee grounds (111). The plurality of nozzles (37, 37A) are positioned outside the central position (S) of the filter bowl (23), and the hot water is jetted to the central side of the filter bowl (23) below the nozzles (37, 37A), so that the coffee powder (111) can be formed with a recess (112) in the central part and a wall-shaped part (113) in the outer peripheral part to extract the high-quality coffee liquid. Further, since the pair of nozzles (37, 37A) is arranged with the center position (S) therebetween, it is possible to extract a good quality coffee liquid by supplying hot water to the coffee powder (111) substantially uniformly.

Description

Coffee machine

Technical Field

The present invention relates to coffee machines.

Background

Conventionally, a coffee maker of this type is known, which includes: a water tank for storing water; a water heating unit for heating and boiling water from the water tank; and a hot water outlet for discharging hot water heated and boiled in the water heating unit to the outside, the hot water outlet being provided at the center of the filter bowl (see, for example, patent document 1).

In the coffee maker, since the hot water is dropped only at the center of the filter bowl, the hot water cannot be uniformly poured into the entire coffee powder in the filter bowl.

In contrast, there is a coffee extraction device that injects warm water in a shower-like manner into a coffee cup (see, for example, patent document 2); still another coffee drip filter is provided with a shower nozzle facing a filter bowl (see, for example, patent document 3); there is also a coffee extraction device that discharges hot water from a shower nozzle by its own weight (see, for example, patent document 4).

In these solutions of supplying hot water in a shower shape, hot water can be uniformly injected into the bowl, but there is a problem that: when the amount of coffee powder in the filter bowl is small, hot water is poured into the outer coffee powder-free portion, and the coffee liquid becomes light. Further, although it is preferable to extract coffee liquid in a state where the center of coffee powder is slightly recessed and a wall-shaped portion is formed on the outer periphery, there is also a problem in that: when hot water is supplied in a shower shape, the hot water may strike the peripheral portion of the coffee powder or it may be difficult to form a wall portion on the peripheral portion of the coffee powder when the number of extraction cups is small.

On the other hand, there is an electric coffee maker including a shower having a plurality of independent shower chambers equal in number to the hot water supply paths, and small holes provided in the bottom walls of the shower chambers, respectively, the shower being disposed so that the hot water supply tip portions of the hot water supply paths communicate with the shower chambers, respectively, and a controller configured to selectively energize the heaters corresponding to the shower chambers, respectively, in accordance with the amount of coffee powder used (see, for example, patent document 5).

The electric coffee maker is provided with a plurality of hot water supply systems, and by selecting at least one of these systems, it is possible to select either one of a hot water diffusion mode in which the hot water is diffused through the small holes of one shower chamber of the shower and a hot water diffusion mode in which the one shower chamber is combined with the small holes of at least one other shower chamber. Therefore, although it is possible to extract coffee liquid by obtaining a hot water diffusion pattern suitable for the amount of coffee powder, there is a problem that the structure becomes complicated.

Documents of the prior art

Patent document

Patent document 1: japanese patent No. 5845814

Patent document 2: japanese examined patent publication (Kokoku) No. 3-8212

Patent document 3: japanese examined patent publication (Kokoku) No. 4-26846

Patent document 4: japanese laid-open patent publication No. 8-280542

Patent document 5: japanese patent application laid-open No. 2595365

Disclosure of Invention

Problems to be solved by the utility model

The present invention has been made to solve the above problems, and an object of the present invention is to provide a coffee maker which has a simple structure and can extract a high-quality coffee liquid regardless of the number of extraction cups.

Means for solving the problems

A coffee machine according to claim 1 of the present invention is a coffee machine for pouring hot water into coffee grounds in a filter bowl, and is characterized by comprising a plurality of nozzles for pouring hot water into the coffee grounds, wherein the plurality of nozzles are located outside a center position of the filter bowl, and nozzle passages of the plurality of nozzles are angled so that the hot water is jetted toward a center side of the filter bowl below the nozzles.

In addition, according to claim 1, the coffee maker according to claim 2 of the present invention is characterized in that the pair of nozzles is arranged with the center position therebetween.

In the coffee machine according to claim 3 of the present invention, according to claim 1 or 2, the nozzle includes an ejection port at a tip of a nozzle passage formed obliquely.

In addition, according to claim 1, the coffee maker according to claim 4 of the present invention is characterized in that the plurality of nozzles are angled such that a distance between a center line of hot water flowing out from one of the nozzle passages and a center line of hot water flowing out from the other nozzle passage is minimized at a position below an upper surface of coffee powder corresponding to a minimum extraction amount.

Effects of the utility model

In the coffee machine according to claim 1 of the present invention, since the plurality of nozzles are located outside the center of the filter bowl and the hot water is jetted toward the center of the filter bowl from directly below the nozzles, the coffee machine can extract the coffee liquid of good quality in a state where the coffee powder has a recess in the center and a wall-like portion in the outer peripheral portion.

Further, since the pair of nozzles is arranged with the center position therebetween, the hot water is supplied substantially uniformly to the coffee powder, and thereby the coffee liquid of good quality can be extracted.

In addition, hot water is ejected from the inclined nozzle passage, and coffee liquid of good quality can be extracted.

The plurality of nozzles are angled so that the distance between the center line of the hot water flowing out from one nozzle passage and the center line of the hot water flowing out from the other nozzle passage is minimized at a position below the upper surface of the coffee powder corresponding to the minimum extraction amount, thereby preventing the hot water from directly contacting the filter, and reliably obtaining a state in which a recess is formed in the central portion of the coffee powder and a wall-shaped portion is formed in the outer peripheral portion, thereby enabling the coffee liquid of good quality to be extracted.

Drawings

FIG. 1 is a longitudinal sectional view showing a main part of a coffee maker according to embodiment 1 of the present invention.

Fig. 2 is an exploded perspective view of the hot water supply unit.

FIG. 3 is a perspective view of the bowl and bowl showing the bowl with the liquid stop valve exploded.

Fig. 4 is an overall explanatory diagram.

Fig. 5 is an enlarged sectional view of the hot water supply part.

Fig. 6 is a plan view of the main portion, showing a state of the hot water supply portion viewed from below.

Fig. 7 is a perspective view seen from obliquely above.

Fig. 8 is a perspective view seen from obliquely below.

Fig. 9 is a perspective view showing a state of coffee powder before coffee liquid is extracted.

Fig. 10 is a perspective view showing a state of coffee powder after coffee liquid is extracted.

In the figure:

1-a coffee machine; 23-a filter bowl; 37-a nozzle; 37A-nozzle; 88-nozzle passage; 89-ejection port; 111-coffee powder; s-center; cmin — corresponds to the upper surface of the coffee powder with the minimum extraction.

Detailed Description

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. The embodiments described below do not limit the scope of the present invention described in the claims. All the configurations described below are not limited to the essential elements of the present invention.

Example 1

Example 1 of the present invention will be described below with reference to fig. 1 to 10. Reference numeral 1 denotes a coffee maker, and a housing main body 2 of the coffee maker 1 includes: a rear standing part 3, a front placing part 4 formed integrally with a lower part of the standing part 3, and a brim part 5 formed integrally with an upper part of the standing part 3. The standing part 3 is provided with a water storage part 6 to supply external water to the water storage part 6, and in this example, a tank of the water storage part 6 is detachably provided in the housing main body 2.

The inside of the shell main body 2 is provided with: a heating unit 7 for heating the water in the water storage unit 6, and a liquid feeding unit 8 for feeding the hot water heated by the heating unit 7 to a hot water supply unit 22 described later, and the liquid feeding unit 8 may be exemplified by a pump or the like.

A substantially planar heating plate 11 is provided above the mounting portion 4 so as to close the opening. Further, a heater 12 is provided on the lower surface of the heating plate 11 so as to be in heat-transferring contact therewith.

A liquid cup 13 is detachably mounted on the heating plate 11. The liquid cup 13 includes: a container body 14 made of heat-resistant glass having an upper opening, a synthetic resin grip 15 attached to a side surface of the container body 14, and a synthetic resin lid 16 covering the upper opening of the container body 14.

A grinder 21, a hot water supply unit 22, and a filter cup 23 are disposed on the side of the upright unit 3 and above the liquid cup 13 of the mounting unit 4. In the figure, S is the center of the filter bowl 23.

The grinder 21 includes a hopper 25 and a cover 26, the hopper 25 having an inlet 24 at an upper portion thereof, and the cover 26 opening and closing the inlet 24. The grinder 21 grinds coffee beans put into the hopper 25, and the coffee beans in the hopper 25 are sent to the ejector 27. The coffee beans sent to the ejector 27 are conveyed toward between the rotary blade 30 and the fixed blade 31 by the grinder screw 29 rotated by a grinder motor (not shown), and ground into coffee powder (ground beans) 111 between the rotary blade 30 and the fixed blade 31. A drop port 32 is provided at a lower portion of the grinder 21, and the coffee grounds 111 are dropped from the drop port 32 and supplied to the center of the filter cup 23. The drop port 32 is cylindrical.

The hot water supply unit 22 is attached to the drop port 32 of the grinder 21. The hot water supply unit 22 includes: a connecting portion 35 connected to the liquid feeding path 8A connected to the liquid feeding unit 8, an annular continuous flow path 36 communicating with the connecting portion 35, and a plurality of

nozzles

37 and 37A connected to the continuous flow path 36. The continuous flow path 36 is formed continuously so as to surround the periphery of the drop port 32.

As shown in fig. 6, the plurality of

nozzles

37, 37A are arranged on a concentric circle about the center S of the filter bowl 23, and the plurality of

nozzles

37, 37 on one side and the plurality of

nozzles

37A, 37A on the other side are provided at positions at equal intervals in the circumferential direction with a shutter 41 described later interposed therebetween. The

nozzles

37, 37 on the one side and the

nozzles

37A, 37A on the other side are provided at positions symmetrical with respect to the center S. The nozzle 37 has the same structure as the nozzle 37A. The center S is located on an extension line of the nozzle passage 88 of the

nozzle

37, 37A.

A horizontal shutter 41 that advances and retreats along the lower surface of the hot water supply unit 22 is provided between the one

nozzle

37, 37 and the

other nozzle

37A, 37A. The shutter 41 has a plate shape with substantially the same width, and a front end portion 42 of the shutter 41 is formed to have a narrow width. A communication opening 43 that can communicate with the drop port 32 is provided in the center of the shutter 41. Further, a hole 44 for allowing the shutter 41 to be inserted and retracted is provided in a lower portion of the hot water supply unit 22 or the brim 5, and an insertion receiving portion 45 into which the tip portion 42 of the shutter 41 is inserted is provided. The upper surface of the shutter 41 abuts against the lower end surface of the cylindrical packing 76 into which the lower end of the drop port 32 is inserted. The shutter 41 is configured to advance and retreat obliquely with respect to the front-rear direction of the housing main body 2.

Fig. 6 shows a state where the drop port 32 is closed by the shutter 41. From this state, the shutter 41 is retracted by shutter advancing and retracting means (not shown), the base end side of the shutter 41 is housed in the housing main body 2, and the communication opening 43 is stopped at a position where it engages with the drop port 32, whereby the drop port 32 can be opened.

The filter cup 23 has a circular upper opening 51 at the upper part, and has arc-shaped side plate parts 52 which are reduced in diameter downward from the upper opening 51, and front and rear inclined

side plate parts

53, 53 which are inclined forward and backward of the arc-shaped side plate parts 52. The front and rear inclined

side plate parts

53, 53 are flat plate-shaped and are connected to a substantially linear bottom part 54 of the filter cup 23. Also, the bottom portion 54 is formed long in the left-right direction.

As shown in fig. 7, 8, and the like, the filter cup 23 is housed in a housing case 55. The housing case 55 and the filter bowl 23 are both provided to be freely retractable from the case body 2. (in fig. 7 and 8, the storage case 55 is removed from the case main body 2 for easy understanding of the structure, but in actuality, the rotation projection 55A is pivotally supported in the bearing recess 2A and rotates in the horizontal direction.) further, a paper filter 56 is disposed in the filter bowl 23.

A vertical valve hole 57 is provided in the center of the bottom 54, and a liquid stop valve 58 is provided in the valve hole 57. The liquid stop valve 58 includes: a valve rod 59 inserted into the valve hole 57, a plurality of longitudinal recesses 60 vertically provided on the outer periphery of the valve rod 59 and forming a gap with the valve hole 57, a valve body 61 provided on the upper portion of the valve rod 59 and closing the valve hole 57, a valve head 62 provided on the lower portion of the valve body 61 and having a curved lower surface, and a coil spring 63 serving as urging means provided between the bottom portion 54 and the valve head 62, and urging the valve rod 59 downward to always close the valve hole 57 by the valve body 61. Further, a through hole 62A is formed in the valve head 62 so as to correspond to the vertical recess 60.

A curved protrusion 66 that abuts against the valve head 62 is provided at the center of the lid 16 of the liquid container 13, and a plurality of through holes 67 are formed in the lower portion of the protrusion 66. Therefore, when the liquid containing cup 13 is placed on the placement portion 4, as shown in fig. 1, the valve head 62 is pushed up by the protrusion 66 to open the liquid stop valve 58, and the coffee liquid in the filter cup 23 drops into the container body 14 through the through hole 67.

The hot water supply unit 22 includes: a flat plate-shaped retainer 71, a first nozzle structure 81, a second nozzle structure 82, an annular outer packing 74, and a cylindrical packing 76 externally attached to the drop port 32. The holder 71 includes: an insertion hole 72 through which the drop port 32 is inserted, an annular packing groove 73 provided on the lower surface of the holder 71 and into which the outer packing 74 is fitted, and an annular fitting recess 75 provided on the lower surface of the holder 71 around the insertion hole 72. The fitting recess 75 is fitted into the upper outer side of the cylindrical packing 76. Further, the retainer 71 has a lower cylindrical portion 77 formed to protrude around the pad groove 73. The lower cylindrical portion 77 is formed coaxially with the center S and is partially notched. The pad groove 73 is provided in an upper portion of the lower tube portion 77. A plurality of mounting projections 78 are provided on the lower surface of the retainer 71 so as to project on the outer peripheral side of the fitting recess 75. In this example, a plurality of (four) mounting

projections

78, 78 are provided on a concentric circle centered on the insertion hole 72. In fig. 2, only one of the fitting projections 78 is shown by a chain line.

The cylindrical packing 76 is provided with a large-diameter fitting portion 79 to be fitted into the fitting recess 75 on the upper outer side of the main body 76A. Further, a semicircular fitting groove portion 80 fitted to the inside of the outer periphery of the mounting convex portion 78 is provided on the outer periphery of the fitting portion 79. Four fitting grooves 80 are provided corresponding to the mounting projections 78.

In the first nozzle structure 81, an upward cylindrical portion 84 is provided on an inner peripheral portion of an annular flat plate portion 83, and a semicircular outer engaging groove portion 85 that fits outside the outer periphery of the attachment convex portion 78 is provided on the cylindrical portion 84. Further, the first nozzle structure 81 has a nozzle inner portion 86 that forms a part of the

nozzles

37 and 37A, and that protrudes downward from the outer peripheral portion of the flat plate portion 83. A curved inclined surface 86A is formed outside the nozzle inner portion 86, and a vertical groove 87 is formed in the center of the inclined surface 86A.

The second nozzle structure 82 integrally includes: an outer fitting tube portion 91 fitted to the main body 76A of the tubular packing 76, and a base portion 92 provided around the outer fitting tube portion 91. Four through holes 93 are formed in the base portion 92 so as to correspond to the four attachment convex portions 78. An outer tube 94 projects around the base portion 92. Further, a nozzle outer portion 95 is provided obliquely inside the outer cylindrical portion 94 and below the outer circumferential side of the base portion 92. The nozzle outer portion 95 is a recess substantially in the same shape as the nozzle inner portion 86 except for the vertical groove 87, and is open in the upper and lower directions. The nozzle inner portion 86 is housed in an inner surface 95A of the nozzle outer portion 95. Further, an engaging stepped portion 97 is provided in an upper portion around the through hole 93, and the engaging stepped portion 97 is engaged with a lower portion of the outer engaging groove portion 85 of the first nozzle structure 81.

As shown in fig. 5, the holder 71, the first nozzle component 81, the cylindrical packing 76, the outer packing 74, and the second nozzle component 82 are integrally assembled by screwing a screw 98 inserted through the through hole 93 from below to the mounting convex portion 78. In the assembled state, the inclined surface 86A abuts against an inner surface 95A of the nozzle outer portion 95, and the inner surface 95A and the vertical groove 87 constitute the

nozzles

37 and 37A having the nozzle passage 88. The tip of the nozzle passage 88 is a discharge port 89. The outer packing 74 is sandwiched and compressed between the packing groove 73 and the distal end of the outer tube 94, thereby forming the watertight continuous flow path 36 surrounded by the retainer 71, the first nozzle component 81, and the second nozzle component 82, and the continuous flow path 36 communicates with the nozzle passages 88 of the

nozzles

37 and 37A. In addition, the nozzle passage 88 has a length greater than its largest dimension in the flow cross-section. The nozzle passages 88 of the

nozzles

37 and 37A have the same flow cross-sectional area.

As shown in fig. 2 and 5, the connection portion 35 communicating with the continuous flow path 36 is provided in the second nozzle structure 82, and a hose 100 constituting a part of the liquid supply path 8A is connected to the connection portion 35.

The holder 71 and the grinder 21 are fixed to the housing body 2.

As shown in fig. 6, the discharge port 89 of the

nozzle

37, 37A is located outside the center S. The

nozzles

37 and 37A are disposed opposite to the center S. As shown in fig. 1 and the like, the angle of the nozzle passage 88 with respect to the vertical direction is set so that the center lines of the hot water jetted from the nozzle passages 88 of the

nozzles

37 and 37A intersect below the upper surface Cmin of the filter cup 23 with respect to the coffee powder 111 corresponding to one cup of coffee liquid, which is the minimum number of cups to be drawn (that is, the distance between the center lines of the hot water flowing out from the nozzle passages 88 is the minimum). The angle is about 20 degrees, and is preferably substantially equal to or slightly larger than the angle of the arc-shaped side plate portion 52. That is, the hot water obliquely discharged from the discharge port 89 toward the center of the filter cup 23 falls in a parabolic shape by gravity.

As shown in fig. 7 and 8, a plurality of switches 101 are disposed on the front surface of the brim 5 to operate the coffee maker 1.

Next, an example of a method of using the coffee maker 1 will be described. First, the user pulls out the storage case 55 horizontally from below the brim 5, puts the paper filter 56 in the filter bowl 23, and then pushes the storage case 55 horizontally into below the brim 5. Then, the liquid cup 13 is placed on the hot plate 11 of the placement part 4. When the liquid containing cup 13 is placed on the hot plate 11, the curved convex portion 66 of the lid 16 provided on the liquid containing cup 13 abuts on the curved valve head 62 of the liquid stop valve 58, and the liquid stop valve 58 is pushed up to release the valve hole 57 provided in the bottom of the filter cup 23. Then, water is put into the water storage unit 6 in an amount corresponding to the number of cups of the extracted coffee liquid. Further, the lid 26 is removed, and a predetermined amount of coffee beans is put into the hopper 25 through the inlet 24. At this stage, the shutter 41 is in a state of closing the drop port 32, and the grinder 21 is not communicated with the inside of the bowl 23.

When the user operates the switch 101, four operations are simultaneously performed. The first one is: the shutter advancing and retreating unit (not shown) moves the shutter 41 toward the outlet hole 44. Thereby, the communication opening 43 overlaps the drop port 32, and the grinder 21 communicates with the inside of the bowl 23. The second is that: the grinder 21 is operated. Accordingly, coffee beans are ground by the grinder 21 to obtain coffee powder 111, and the coffee powder 111 is dropped from the drop port 32 and supplied into the paper filter 56 of the filter cup 23. An example of which is shown in figure 9. The predetermined amount is, for example, an amount corresponding to the number of cups of coffee liquid, such as one cup, two cups, or three cups. The third is that: the energization of the heating unit 7 is started. Thereby, the water in the water storage unit 6 is heated to be hot water. Further, the fourth is: the heater 12 is initially energized. Thereby, the liquid cup 13 placed on the heating plate 11 is heated.

When a sufficient amount of time has elapsed to grind the entire predetermined amount of coffee beans, the grinder 21 is stopped. When the operation of the grinder 21 is stopped, the shutter advancing and retreating unit (not shown) moves the shutter 41 toward the insertion and accommodation portion 45, and the shutter 41 closes the drop port 32. After the gate 41 closes the drop port 32, the water in the water storage unit 6 is heated to a predetermined temperature (85 to 90 ℃). When it is detected that the temperature of the hot water in the water storage unit 6 reaches a predetermined temperature, the energization of the heating unit 7 is stopped, and then the hot water in the water storage unit 6 is transported to the hot water supply unit 22 through the liquid transport path 8A by the liquid transport unit 8, and the hot water is ejected obliquely downward from the plurality of

nozzles

37 and 37A connected to the continuous flow path 36. After the hot water supply by the injection is continued for a predetermined time, for example, 8 seconds, the hot water supply is stopped for a predetermined boiling time, that is, for a period of 20 seconds, and the coffee powder 111 is boiled during this period.

After the boiling time has elapsed, the hot water is continuously supplied to the entire amount of the hot water in the water storage unit 6. Further, since the amount of water in the water storage unit 6 corresponds to the number of cups of coffee liquid to be extracted as described above, if all of the hot water in the water storage unit 6 is supplied to the filter cups 23, a predetermined number of cups of coffee liquid can be obtained, and the water storage unit 6 is emptied. In this case, since the hot water is obliquely jetted from the plurality of

nozzles

37 and 37A toward the center of the filter cup 23, even if the amount of the coffee powder 111 is different, the hot water does not fall from the portion where the coffee powder 111 is not present through the paper filter 56, and the hot water jetted toward the outer peripheral portion of the coffee powder 111 is not strongly stirred, so that the coffee powder 111 can be extracted while maintaining a favorable state in which the center is depressed as shown in fig. 10. Further, as described above, the distance between the center lines of the hot water ejected from the nozzle passages 88 of the

nozzles

37 and 37A is set to be the smallest below the upper surface Cmin of the filter cup 23 for the coffee grounds 111 corresponding to one cup of coffee liquid, which is the smallest number of cups to be extracted, so that the hot water does not directly contact the portion of the paper filter 56 on the opposite side of the

nozzles

37 and 37A with respect to the center S, and the hot water ejected to the outer peripheral portion of the coffee grounds 111 on the opposite side of the

nozzles

37 and 37A is not strongly stirred. Therefore, a state in which the recess 112 is formed in the central portion of the coffee powder 111 and the wall portion 113 is formed in the outer peripheral portion can be obtained reliably, and a good quality coffee liquid can be extracted. Fig. 10 is a photograph of the coffee powder 111 in the filter cup 23 after extraction of the coffee liquid, and it is seen that a recess 112 is formed in the center and a wall portion 113, which is a raised portion, is formed in the outer periphery.

In this way, when the coffee grounds 111 are formed with the appropriate recesses 112 and the wall portions 113, the hot water substantially uniformly and reliably passes through the paper filter 56 from the coffee grounds 111, and therefore, a coffee liquid of good quality can be obtained. On the other hand, if the wall-shaped portion 113 is formed on the outer periphery of the coffee powder 111, the hot water may pass through the coffee powder 111 at different positions, causing unevenness in the coffee liquid to be drawn, and adversely affecting the taste of the coffee liquid to be obtained.

After passing through the valve hole 57, the coffee liquid drawn out passes through the through hole 62A of the valve head 62 and the through hole 67 of the lid 16 of the cup 13 and is retained in the cup 13. When the liquid containing cup 13 is removed from the placement portion 4, the liquid stop valve 58 is pressed down by the coil spring 63, and the valve body 61 closes the valve hole 57, so that the coffee liquid can be prevented from dropping from the filter cup 23.

As described above, the coffee maker 1 according to the present embodiment for injecting hot water into coffee grounds 111 in the filter bowl 23 includes the plurality of

nozzles

37 and 37A for injecting hot water into the coffee grounds 111, the plurality of

nozzles

37 and 37A are positioned outside the center position of the filter bowl 23, and the nozzle passages 88 of the plurality of

nozzles

37 and 37A are angled so that hot water is ejected toward the center side of the filter bowl 23 directly below the

nozzles

37 and 37A, so that it is possible to extract good-quality coffee liquid in a state where the recess 112 is formed in the center of the coffee grounds 111 and the wall-shaped portion 113 is formed in the outer peripheral portion.

Further, since the plurality of

nozzles

37 and 37A are provided and the pair of

nozzles

37 and 37A are arranged with the center position S therebetween, it is possible to extract a good quality coffee liquid by uniformly supplying hot water to the coffee powder 111.

Further, since the

nozzle

37, 37A has the ejection port 89 at the tip of the nozzle passage 88 formed obliquely, hot water is ejected from the oblique nozzle passage 88, and coffee liquid of good quality can be extracted.

Further, the plurality of

nozzles

37 and 37A are angled so that the center line of the hot water flowing out from the one nozzle passage 88 and the center line of the hot water flowing out from the other nozzle passage 88 intersect below the upper surface Cmin of the coffee powder 111 corresponding to the minimum extraction amount, so that the hot water does not directly contact the portion of the paper filter 56 opposite to the

nozzles

37 and 37A with respect to the center S, and the hot water jetted to the outer peripheral portion of the coffee powder 111 opposite to the

nozzles

37 and 37A is not strongly stirred, so that the state in which the recess 112 is formed in the central portion of the coffee powder 111 and the wall-shaped portion 113 is formed in the outer peripheral portion can be reliably obtained, and the coffee liquid of good quality can be derived.

Hereinafter, in terms of the effects of the embodiment, since the

nozzles

37 and 37A communicate with the common continuous channel 36 and the cross-sectional flow area of the continuous channel 36 is formed larger than the cross-sectional flow area of the nozzle passage 88, hot water can be ejected substantially uniformly from the

nozzles

37 and 37A. Further, since the

nozzles

37 and 37A are configured by assembling the

nozzle forming bodies

81 and 82, the nozzles can be manufactured at a lower cost than a case where the nozzles are mounted one by one. Further, the

nozzle components

81 and 82 and the retainer 71 can easily form the continuous flow path 36 communicating with the nozzle passage 88. Further, since the plurality of

nozzles

37, 37 on one side are arranged at equal intervals on a concentric circle centering on the center S of the bowl 23, and the plurality of

nozzles

37A, 37A on the other side are arranged at equal intervals on a concentric circle centering on the center S of the bowl 23, hot water can be supplied substantially uniformly.

Further, since the drop port 32 of the grinder 21 is provided at the center of the

nozzles

37 and 37A, the coffee powder 111 can be dropped and supplied to the center of the filter cup 23. Further, the drop port 32 can be closed by the shutter 41 serving as an opening and closing means, and a cylindrical packing 76 is provided around the drop port 32, and the cylindrical packing 76 abuts against the upper surface of the shutter 41, so that the steam can be prevented from entering the grinder 21.

The present invention is not limited to the above embodiments, and can be modified and implemented within the scope of the gist of the present invention. For example, in fig. 6, the center S is located on an extension line on the plane of the nozzle passage, but the extension line on the plane of the nozzle passage may be offset from the center S as long as the nozzle ejects hot water toward the center of the bowl than directly below the nozzle. In addition, the angle of the hot water discharged from the nozzle can be appropriately selected according to the shape of the side plate portion of the bowl.

Claims

1. A coffee machine, which injects hot water into coffee powder in a filter cup,

the coffee maker as described above is characterized in that,

comprises a grinder for grinding coffee beans into the coffee powder and supplying the coffee powder to the center of the filter cup, and a plurality of nozzles for injecting hot water into the coffee powder,

a hot water supply part provided with a plurality of nozzles comprises a first nozzle forming body and a second nozzle forming body,

the first nozzle structure is provided with a nozzle inner part forming a part of the nozzle in a downward protruding manner, a longitudinal groove part is vertically arranged at the center of an inclined surface formed at the outer side of the nozzle inner part,

a nozzle outer part is obliquely arranged on the second nozzle forming body, the nozzle outer part forms a part of the nozzle, is a concave part which is approximately the same as the nozzle inner part except for the vertical groove part and is opened up and down,

the nozzle passages of a plurality of nozzles are formed by the vertical groove part of the inner side part of the nozzle inserted into the outer side part of the nozzle and the inner surface of the outer side part of the nozzle,

the plurality of nozzles are positioned outside the center of the filter bowl, and nozzle passages of the plurality of nozzles are angled so that hot water is discharged toward the center of the filter bowl directly below the nozzles.

2. Coffee machine according to claim 1,

the pair of nozzles is arranged with the center position therebetween.

3. Coffee machine according to claim 1 or 2,

the nozzle includes a discharge port at a tip of a nozzle passage formed obliquely.

4. Coffee machine according to claim 1,

the plurality of nozzles are angled so that the distance between the center line of the hot water flowing out from one nozzle passage and the center line of the hot water flowing out from the other nozzle passage is minimized at a position below the upper surface of the coffee powder corresponding to the minimum extraction amount.