CN113812850A

CN113812850A - Flow velocity adjusting and controlling device of drip coffee machine

Info

Publication number: CN113812850A
Application number: CN202111102480.9A
Authority: CN
Inventors: 卓燊; 刘启昌
Original assignee: Zhuhai Dianjin Creative Product Design Co ltd
Current assignee: Zhuhai Dianjin Creative Product Design Co ltd
Priority date: 2021-09-20
Filing date: 2021-09-20
Publication date: 2021-12-21

Abstract

The invention discloses a flow rate regulation and control device of a drip coffee machine, which comprises a funnel (1), a brewing bin (2), a regulation dial plate (3) and a bottom cover (4), wherein the funnel (1) is arranged in the brewing bin (2), the bottom of the funnel (1) is provided with a first outlet (10), the bottom of the brewing bin (2) is provided with a central hole (20) and a first connecting column (24), the regulation dial plate (3) is provided with a second outlet (30), the bottom surface of the regulation dial plate (3) is provided with an arc strip-shaped limiting hole (34), the bottom cover (4) is provided with a brewed coffee outlet (7) and a second connecting column (44), the second connecting column (44) passes through the limiting hole (34) from bottom to top and then is connected with the first connecting column (24), the regulation dial plate (3) is clamped between the bottom of the brewing bin (2) and the bottom cover (4), the regulation dial plate (3) is axially limited, and the regulation dial plate (3) rotates along the center, the second connecting column (44) and the first connecting column (24) are limited through the limiting hole (34), the circumferential direction of the rotation angle of the adjusting drive plate (3) is limited, the flow rate is the fastest when the adjusting drive plate (3) rotates to the first limit limiting position, and the flow rate is the slowest when the adjusting drive plate (3) rotates to the second limit limiting position.

Description

Flow velocity adjusting and controlling device of drip coffee machine

Technical Field

The invention relates to a coffee brewing appliance, in particular to a flow rate adjusting and controlling device of a drip coffee machine.

Background

Coffee is one of the three major beverages in the world. In the prior art, the coffee brewing apparatus is mainly used on a desktop of a home or an office, is connected with a mains supply through a cable, and uses water and coffee powder, a powder packet, a coffee capsule and the like to brew coffee. Drip coffee makers are a common type of coffee maker. For the existing drip coffee machine, when brewed coffee flows out of the pot, the flow rate of the outlet liquid is fixed and cannot be adjusted, so that the concentration of the prepared coffee cannot be adjusted according to the requirements of tastes, and the requirements of different tastes for use are difficult to meet.

In addition, the brewing chamber of the existing drip coffee machine is not provided with an overflow device, and once excessive water is added, the excessive water can directly overflow from the brewing chamber to the outside, so that the coffee machine is polluted and is not easy to clean.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides the flow rate adjusting and controlling device of the drip coffee machine, which has the advantages of adjustable outflow flow rate, convenient operation and convenient adjustment of coffee concentration.

The technical scheme adopted by the invention is as follows: the invention comprises a funnel, a brewing chamber, an adjusting drive plate and a bottom cover, wherein the funnel is arranged in the brewing chamber, the top edge of the funnel is lapped and fixed on the top edge of the brewing chamber, the bottom of the funnel is provided with at least one first outlet, the bottom of the brewing chamber is provided with a central hole and at least two first connecting columns, the adjusting drive plate is provided with at least one second outlet, the bottom surface of the adjusting drive plate is provided with at least two arc-shaped strip-shaped limiting holes taking the center as the circle center, the center of the bottom cover is provided with a brewed coffee outlet, the periphery of the bottom cover is provided with at least two second connecting columns, the second connecting columns penetrate through the limiting holes from bottom to top and then are connected and fixed with the first connecting columns, the adjusting drive plate is clamped between the bottom of the brewing chamber and the bottom cover, the adjusting drive plate is axially limited, and can rotate along the center, the connection whole body of the second connecting column and the first connecting column is limited through the limiting hole so as to limit the rotation angle of the adjusting drive plate in the circumferential direction, when the adjusting drive plate rotates to a first limit limiting position, the first outlet is completely communicated with the second outlet, and a brewed coffee flow channel in which the first outlet, the second outlet, the central hole and the brewed coffee outlet are sequentially communicated is formed, at the moment, the flow rate is fastest, when the adjusting drive plate rotates to a second limit limiting position, the dislocation between the first outlet and the second outlet is maximum, the space of the brewed coffee flow channel is minimum, at the moment, the flow rate is slowest, when the adjusting drive plate rotates from the first limit limiting position to the second limit limiting position, the dislocation between the first outlet and the second outlet is gradually increased, and the space of the brewed coffee flow channel is gradually decreased, the flow rate is gradually slowed down to perform flow rate regulation control.

The bottom of funnel is equipped with the guide pillar of underbump, the edge of guide pillar is equipped with at least one blind hole that sinks, first export set up in sink the blind hole with the side between the guide pillar, so that sink the blind hole with the guide pillar communicates with each other, the guide pillar reaches sink the blind hole stretch into in the centre bore and with the shape looks adaptation of centre bore, it is right to fix a position the funnel, the middle part of adjusting the driver plate is equipped with the epirelief blind hole, the second export set up in the side of epirelief blind hole, the epirelief blind hole inserts from bottom to top in the guide pillar, first export with the position looks adaptation of second export.

Fixed package is covered with the sealing connection cap on the epirelief blind hole, the lateral wall of sealing connection cap is equipped with the sealing ring of at least one evagination, in order to right the bottom of funnel with adjust and seal between the driver plate, avoid making coffee overflow to adjust on the driver plate, the side of sealing connection cap is equipped with the via hole, the via hole with the size and the position of second export are unanimous.

The top of the upper convex blind hole is provided with a first positioning part, the top of the sealing connection cap is provided with a second positioning part, and the second positioning part is matched with the first positioning part, so that the sealing connection cap can be quickly and accurately covered and fixed on the upper convex blind hole.

An annular groove is formed in the periphery of the brewed coffee outlet on the bottom cover, a sealing ring is arranged in the annular groove to seal the bottom cover and the bottom of the adjusting driving plate, brewed coffee is ensured to flow out of the brewed coffee outlet, and overflow to the bottom cover is avoided.

And the outer side wall of the adjusting drive plate is provided with a convex shift.

The outer side wall of the adjusting drive plate is provided with a shifting damping pattern.

The side of the brewing chamber is provided with a handle.

The funnel is close to the top and is equipped with first overflow mouth, the back of funnel is certainly first overflow mouth downwardly extending to the bottom is equipped with first overflow launder, from upward downwardly extending to the bottom is equipped with the second overflow launder in the storehouse of making the wine, the bottom of second overflow launder is equipped with the second overflow mouth, be equipped with the third overflow mouth on the regulation driver plate, be equipped with the fourth overflow mouth on the bottom, the funnel with it connects fixed back to make the storehouse, first overflow launder with the sealed lock of second overflow launder becomes overflow passageway, the second overflow mouth passes in proper order the third overflow mouth fourth overflow mouth, when the water level is higher than when first overflow mouth, make coffee follow first overflow mouth flows in overflow passageway follows in the bottom the second overflow mouth flows.

The third overflow port is arc-shaped and strip-shaped, so that when the adjusting drive plate rotates between the first limit position and the second limit position, the third overflow port is prevented from interfering with the overflow channel.

The invention has the beneficial effects that: the invention comprises a funnel, a brewing chamber, an adjusting drive plate and a bottom cover, wherein the funnel is arranged in the brewing chamber, the top edge of the funnel is lapped and fixed on the top edge of the brewing chamber, the bottom of the funnel is provided with at least one first outlet, the bottom of the brewing chamber is provided with a central hole and at least two first connecting columns, the adjusting drive plate is provided with at least one second outlet, the bottom surface of the adjusting drive plate is provided with at least two arc-shaped strip-shaped limiting holes taking the center as the circle center, the center of the bottom cover is provided with a brewed coffee outlet, the periphery of the bottom cover is provided with at least two second connecting columns, the second connecting columns penetrate through the limiting holes from bottom to top and then are connected and fixed with the first connecting columns, the adjusting drive plate is clamped between the bottom of the brewing chamber and the bottom cover, the adjusting drive plate is axially limited, and can rotate along the center, the connection whole body of the second connecting column and the first connecting column is limited through the limiting hole so as to limit the rotation angle of the adjusting drive plate in the circumferential direction, when the adjusting drive plate rotates to a first limit limiting position, the first outlet is completely communicated with the second outlet, and a brewed coffee flow channel in which the first outlet, the second outlet, the central hole and the brewed coffee outlet are sequentially communicated is formed, at the moment, the flow rate is fastest, when the adjusting drive plate rotates to a second limit limiting position, the dislocation between the first outlet and the second outlet is maximum, the space of the brewed coffee flow channel is minimum, at the moment, the flow rate is slowest, when the adjusting drive plate rotates from the first limit limiting position to the second limit limiting position, the dislocation between the first outlet and the second outlet is gradually increased, and the space of the brewed coffee flow channel is gradually decreased, the flow rate gradually becomes slow, so that the flow rate is adjusted and controlled; the invention overcomes the defects and shortcomings of the prior art, creatively designs the speed adjustment of the coffee outlet liquid of the coffee machine during the dripping, and performs circumferential limiting and adjustment through the rotation angle of the adjusting drive plate, thereby realizing the adjustment of the speed of the brewed coffee outlet liquid in the funnel, the operation is convenient, the liquid outlet speed is adjusted and controlled, the time for brewing coffee powder and other raw materials in the funnel is adjusted, the coffee concentration is further adjusted, and therefore, the liquid outlet flow speed of the flow speed adjusting and controlling device of the dripping coffee machine can be adjusted, the operation is convenient, and the coffee concentration is convenient to adjust;

because the funnel is provided with a first overflow port near the top, the back of the funnel extends downwards from the first overflow port to the bottom and is provided with a first overflow groove, the brewing bin extends downwards from the top to the bottom and is provided with a second overflow groove, the bottom of the second overflow groove is provided with a second overflow port, the adjusting dial is provided with a third overflow port, the bottom cover is provided with a fourth overflow port, after the funnel is fixedly connected with the brewing bin, the first overflow groove and the second overflow groove are sealed and buckled into an overflow channel, the second overflow port sequentially passes through the third overflow port and the fourth overflow port, and when the water level is higher than the first overflow port, brewed coffee flows into the overflow channel from the first overflow port and flows out from the second overflow port at the bottom; the invention also adjusts the liquid outlet speed in a matching way, and is provided with the overflow device, so that the overflow problem caused by large water inlet amount can be avoided, the excessive water can flow out from the bottom of the brewing bin to the water receiving tray or the coffee container through overflow, the direct outward overflow from the top of the brewing bin is avoided, the pollution to the coffee machine is avoided, and the cleaning is convenient.

Drawings

FIG. 1 is a schematic view showing the overall structure of a flow rate adjustment control device of a drip coffee maker according to an embodiment of the present invention;

FIG. 2 is a schematic view of another perspective of the flow rate regulating and controlling device of the drip coffee maker according to the embodiment of the present invention;

FIG. 3 is an exploded view of the flow rate adjustment control device of the drip coffee maker in accordance with the embodiment of the present invention;

FIG. 4 is a schematic top view of a flow rate regulating control device of a drip coffee maker according to an embodiment of the present invention;

FIG. 5 is a schematic sectional view A-A of FIG. 4;

FIG. 6 is a schematic cross-sectional view of B-B shown in FIG. 4;

FIG. 7 is a schematic diagram of the overall structure of a funnel according to an embodiment of the present invention;

figure 8 is a schematic view of the overall construction of a brewing chamber according to an embodiment of the invention.

Detailed Description

As shown in fig. 1 to 8, the flow rate adjustment and control device of the drip coffee maker of the present embodiment includes a funnel 1, a brewing chamber 2, an adjustment dial 3, and a bottom cover 4, wherein the funnel 1 is disposed in the brewing chamber 2, the top edge of the funnel 1 is fixed to the top edge of the brewing chamber 2 in an overlapping manner, two first outlets 10 are disposed at the bottom of the funnel 1, a central hole 20 and three first connection columns 24 are disposed at the bottom of the brewing chamber 2, two second outlets 30 are disposed on the adjustment dial 3, three arc-shaped strip-shaped limiting holes 34 with the center as the center are disposed on the bottom surface of the adjustment dial 3, a brewed coffee outlet 7 is disposed at the center of the bottom cover 4, three second connection columns 44 are disposed at the periphery of the bottom cover 4, the second connection columns 44 penetrate through the limiting holes 34 from bottom to top and then are connected and fixed to the first connection columns 24, and the adjustment dial 3 is clamped between the bottom of the brewing chamber 2 and the bottom cover 4, and the adjusting dial plate 3 is axially limited, the adjusting dial plate 3 can rotate along the center, and the whole connection between the second connection column 44 and the first connection column 24 is limited through the limiting hole 34, so as to circumferentially limit the rotation angle of the adjusting dial plate 3, when the adjusting dial plate 3 rotates to a first limit limiting position, the first outlet 10 and the second outlet 30 are completely communicated, and a brewed coffee flow channel in which the first outlet 10, the second outlet 30, the central hole 20 and the coffee outlet 7 are sequentially communicated is formed, at this time, the flow rate is fastest, when the adjusting dial plate 3 rotates to a second limit limiting position, the dislocation between the first outlet 10 and the second outlet 30 is maximal, the space of the brewed coffee flow channel is minimal, at this time, the flow rate is slowest, and the complete dislocation between the first outlet 10 and the second outlet 30 can be set, at this time, the space of the brewed coffee flow channel is completely blocked, the flow rate can be 0 at the slowest, namely, the outlet liquid is in a closed state, when the adjusting dial plate 3 rotates from the first limit position to the second limit position, the dislocation between the first outlet 10 and the second outlet 30 is gradually increased, the space of the brewed coffee flow channel is gradually reduced, and the flow rate is gradually reduced, so that the flow rate adjusting control is carried out.

Specifically, a downwardly convex guide pillar 14 is arranged at the bottom of the funnel 1, two opposite sunken blind holes 12 are arranged at the edge of the guide pillar 14, two first outlets 10 are arranged on the side surface between the two sunken blind holes 12 and the guide pillar 14 and are opposite to each other, so that the sunken blind holes 12 are communicated with the guide pillar 14, the guide pillar 14 and the sunken blind holes 12 extend into the central hole 20 and are matched with the central hole 20 in shape to position and fix the funnel 1, an upwardly convex blind hole 32 is arranged in the middle of the adjusting dial 3, the second outlet 30 is arranged on the side surface of the upwardly convex blind hole 32, the upwardly convex blind hole 32 is inserted into the guide pillar 14 from bottom to top, and the first outlet 10 is matched with the second outlet 30 in position; the upper convex blind hole 32 is fixedly covered with a sealing connection cap 5, the side wall of the sealing connection cap 5 is provided with four convex sealing rings 52 to perform multi-stage sealing between the bottom of the funnel 1 and the adjusting dial plate 3, so that brewed coffee is prevented from overflowing onto the adjusting dial plate 3 when the adjusting dial plate 3 rotates, the side surface of the sealing connection cap 5 is provided with two opposite through holes 50, and the size and the position of the through holes 50 are consistent with those of the second outlet 30; the top of the upper convex blind hole 32 is provided with a first positioning portion 35, the top of the sealing connection cap 5 is provided with a second positioning portion 55, the second positioning portion 55 is matched with the first positioning portion 35, so that the sealing connection cap 5 can be quickly and accurately covered and fixed on the upper convex blind hole 32, in this embodiment, the second positioning portion 55 and the first positioning portion 35 are both in a convex cross shape; an annular groove 46 is formed in the bottom cover 4 and at the periphery of the brewed coffee outlet 7, a sealing ring 6 is arranged in the annular groove 46 to seal the bottom cover 4 and the bottom of the adjusting drive plate 3, so that brewed coffee is ensured to flow out of the brewed coffee outlet 7, and the adjusting drive plate 3 is prevented from overflowing onto the bottom cover 4 when rotating; the outer side wall of the adjusting driving plate 3 is provided with a convex shifting block 9 for shifting and adjusting the adjusting driving plate 3, and the outer side wall of the adjusting driving plate 3 is provided with a shifting damping pattern 39 for shifting and adjusting the adjusting driving plate 3; the side of the brewing chamber 2 is provided with a handle 8, so that the brewing chamber 2 can be conveniently taken and placed by hand from the drip coffee machine.

In addition, the present embodiment further includes an overflow device, specifically, a first overflow port 11 is disposed near the top of the funnel 1, a first overflow trough 13 is disposed on the back surface of the funnel 1 and extends downward from the first overflow port 11 to the bottom, a second overflow trough 21 is disposed in the brewing chamber 2 and extends downward from the top to the bottom, a second overflow port 22 is disposed at the bottom of the second overflow trough 21, a third overflow port 31 is disposed on the adjusting dial 3, a fourth overflow port 41 is disposed on the bottom cover 4, after the funnel 1 and the brewing chamber 2 are connected and fixed, the first overflow trough 13 and the second overflow trough 21 are sealed and fastened to form an overflow channel, the second overflow port 22 sequentially passes through the third overflow port 31 and the fourth overflow port 41, when the water level is higher than the first overflow port 11, the brewed coffee flows into the overflow channel from the first overflow port 11, flows out of the second overflow port 22 at the bottom; the third overflow port 31 is arc-shaped, so that when the adjusting dial 3 rotates between the first limit position and the second limit position, the third overflow port 31 is prevented from interfering with the overflow channel.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only preferred examples of the present invention, and are not intended to limit the scope of the present invention. For example, the numbers of the first outlets 10, the sunken blind holes 12, the second outlets 30, the via holes 50, the first connecting columns 24, the second connecting columns 44, the limiting holes 34, and the sealing rings 52 may be changed according to actual conditions. Various changes and modifications may be made to the invention without departing from the spirit and scope of the invention, and such changes and modifications are intended to be within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

The invention overcomes the defects and shortcomings of the prior art, creatively designs the coffee outlet speed regulation of the coffee machine during dripping, and carries out circumferential limiting and regulation through the rotation angle of the regulating drive plate 3, thereby realizing the regulation of the coffee outlet speed brewed in the funnel 1, the operation is convenient, the coffee outlet speed is regulated and controlled, the time for brewing coffee powder and other raw materials in the funnel 1 is regulated, and the coffee concentration is further regulated; the invention also cooperates with and regulates the liquid-out speed, has set up the overflow device, can avoid the overflow problem brought by the large inflow, make the excessive water flow out to the water pan or coffee container from the bottom of the said brewing cabin 2 through overflowing, has avoided overflowing from the top of the brewing cabin to the outside directly, avoid causing the pollution of the coffee machine, it is easy to clear up; therefore, the flow velocity adjusting and controlling device of the drip coffee machine can adjust the liquid outlet flow velocity, is convenient to operate, is convenient to adjust the coffee concentration, avoids the pollution of the coffee machine and is convenient to clean.

The invention can be widely applied to the field of coffee brewing appliances.

Claims

1. The utility model provides a flow velocity modulation controlling means of drip coffee machine which characterized in that: comprises a funnel (1), a brewing chamber (2), an adjusting drive plate (3) and a bottom cover (4), wherein the funnel (1) is arranged in the brewing chamber (2), the top edge of the funnel (1) is fixed on the top edge of the brewing chamber (2), the bottom of the funnel (1) is provided with at least one first outlet (10), the bottom of the brewing chamber (2) is provided with a center hole (20) and at least two first connecting columns (24), the adjusting drive plate (3) is provided with at least one second outlet (30), the bottom surface of the adjusting drive plate (3) is provided with at least two arc-shaped strip-shaped spacing holes (34) which take the center as the circle center, the center of the bottom cover (4) is provided with a brewing coffee outlet (7), the periphery is provided with at least two second connecting columns (44), and the second connecting columns (44) upwards penetrate through the spacing holes (34) and then are connected and fixed with the first connecting columns (24), simultaneously, the adjusting dial plate (3) is clamped between the bottom of the brewing bin (2) and the bottom cover (4), the adjusting dial plate (3) is axially limited, the adjusting dial plate (3) can rotate along the center, the whole connection body of the second connecting column (44) and the first connecting column (24) is limited through the limiting hole (34), so that the circumferential limitation is carried out on the rotation angle of the adjusting dial plate (3), when the adjusting dial plate (3) rotates to a first limit limiting position, the first outlet (10) is completely communicated with the second outlet (30) and forms a coffee brewing flow channel which is communicated with the first outlet (10), the second outlet (30), the center hole (20) and the brewed coffee outlet (7) in sequence, at the moment, the flow rate is fastest, and when the adjusting dial plate (3) rotates to a second limit limiting position, the dislocation between the first outlet (10) and the second outlet (30) is the largest, the space of the brewed coffee flow channel is the smallest, the flow rate is the slowest at the moment, when the adjusting drive plate (3) rotates from a first limit position to a second limit position, the dislocation between the first outlet (10) and the second outlet (30) is gradually increased, the space of the brewed coffee flow channel is gradually decreased, and the flow rate is gradually decreased, so that the flow rate is adjusted and controlled.

2. The flow rate regulation control device of a drip coffee machine according to claim 1, characterized in that: a guide post (14) which is convex downwards is arranged at the bottom of the funnel (1), at least one sinking blind hole (12) is arranged at the edge of the guide post (14), the first outlet (10) is arranged on the side surface between the sinking blind hole (12) and the guide post (14), so that the sinking blind hole (12) is communicated with the guide post (14), the guide post (14) and the sinking blind hole (12) extend into the central hole (20) and are matched with the central hole (20) in shape, so as to position and fix the funnel (1), the middle part of the adjusting drive plate (3) is provided with an upward convex blind hole (32), the second outlet (30) is arranged on the side surface of the upper convex blind hole (32), the upper convex blind hole (32) is inserted into the guide post (14) from bottom to top, the first outlet (10) is adapted to the position of the second outlet (30).

3. The flow rate regulation control device of a drip coffee machine according to claim 2, characterized in that: fixed package cover has sealing connection cap (5) on epirelief blind hole (32), the lateral wall of sealing connection cap (5) is equipped with sealing ring (52) of at least one evagination, it is right the bottom of funnel (1) with seal between adjusting driver plate (3), avoid making coffee overflow to adjust on driver plate (3), the side of sealing connection cap (5) is equipped with via hole (50), via hole (50) with the size and the position of second export (30) are unanimous.

4. The flow rate regulation control device of a drip coffee machine according to claim 3, characterized in that: the top of the upper convex blind hole (32) is provided with a first positioning part (35), the top of the sealing connection cap (5) is provided with a second positioning part (55), and the second positioning part (55) is matched with the first positioning part (35) so that the sealing connection cap (5) can be quickly and accurately covered and fixed on the upper convex blind hole (32).

5. The flow rate regulation control device of a drip coffee machine according to claim 1, characterized in that: the bottom cover (4) is provided with an annular groove (46) at the periphery of the brewed coffee outlet (7), a sealing ring (6) is arranged in the annular groove (46) to seal the bottom cover (4) and the bottom of the adjusting drive plate (3), so that brewed coffee is ensured to flow out of the brewed coffee outlet (7) and is prevented from overflowing onto the bottom cover (4).

6. The flow rate regulation control device of a drip coffee machine according to claim 1, characterized in that: the outer side wall of the adjusting drive plate (3) is provided with a convex shift (9).

7. The flow rate regulation control device of a drip coffee machine according to claim 2, characterized in that: the outer side wall of the adjusting dial (3) is provided with toggle damping patterns (39).

8. The flow rate regulation control device of a drip coffee machine according to claim 1, characterized in that: the side surface of the brewing chamber (2) is provided with a handle (8).

9. The flow rate regulation control device of a drip coffee machine according to claim 1, characterized in that: the funnel (1) is provided with a first overflow port (11) near the top, the back of the funnel (1) extends downwards to the bottom from the first overflow port (11) and is provided with a first overflow groove (13), the brewing chamber (2) extends downwards to the bottom from the top and is provided with a second overflow groove (21), the bottom of the second overflow groove (21) is provided with a second overflow port (22), the adjusting dial (3) is provided with a third overflow port (31), the bottom cover (4) is provided with a fourth overflow port (41), the funnel (1) and the brewing chamber (2) are connected and fixed, the first overflow groove (13) and the second overflow groove (21) are sealed and buckled into an overflow channel, the second overflow port (22) sequentially passes through the third overflow port (31) and the fourth overflow port (41), when the water level is higher than the first overflow port (11), brewed coffee flows from the first overflow opening (11) into the overflow channel and flows out at the bottom from the second overflow opening (22).

10. The flow rate regulation control device of a drip coffee machine according to claim 9, characterized in that: the third overflow port (31) is arc-shaped and strip-shaped, so that when the adjusting dial plate (3) rotates between the first limit limiting position and the second limit limiting position, the third overflow port (31) is prevented from interfering with the overflow channel.