CN219782275U - Brewing head, coffee brewing mechanism and coffee machine - Google Patents

Abstract

The utility model provides a brewing head, a coffee brewing mechanism and a coffee machine, and belongs to the technical field of coffee machines. The brewing head is applied to a coffee brewing mechanism and comprises a screw rod and a piston, wherein a filter cavity and a slot are arranged in the piston, a water outlet column is arranged in the screw rod, and a water inlet end of the water outlet column extends into the slot; an annular channel is formed between the inner wall of the slot and the outer wall of the water inlet end of the water outlet column, the filter cavity can be communicated with the outside through the annular channel, a sealing ring is arranged in the annular channel, the piston can move between a first position and a second position relative to the screw rod along the axial direction of the screw rod, and the piston is arranged at the first positionThe sealing ring seals the annular channel to cut off the communication between the filter cavity and the outside; the piston is in the second position, and the sealing ring opens the annular channel to enable the filter cavity to be communicated with the outside _。 The brewing head can balance the pressure between the brewing cavity and the outside in the coffee brewing mechanism, and prevent residual liquid in the filtering cavity and the water outlet column of the brewing head from flowing back into the brewing cavity.

Description

Brewing head, coffee brewing mechanism and coffee machine

Technical Field

The utility model belongs to the technical field of coffee machines, and particularly relates to a brewing head, a coffee brewing mechanism and a coffee machine.

Background

Coffee machines are currently available on the market which brew coffee through their internal coffee brewing mechanisms. For example, chinese patent publication No. CN115137210a provides a coffee brewing structure and a coffee machine, the coffee brewing structure includes a body, a powder pushing assembly, and a brewing assembly, the body has a brewing chamber therein, and the brewing chamber has a first opening and a second opening opposite to each other. The powder pushing component stretches into the brewing cavity from the first opening, the brewing head can rotate to the second opening on the body, the powder pushing component can move along the stretching direction to be matched with the brewing head in the brewing component to compact coffee powder, hot water is injected into the brewing cavity to brew coffee, a filter cavity communicated with the brewing cavity is arranged in the brewing head, brewed coffee liquid flows into the filter cavity through the filter screen on the brewing head in a filtering mode, and finally discharged through the water outlet column on the brewing head. After the coffee brewing mechanism is used for brewing coffee, when the brewing head is far away from a coffee cake, residual liquid in a filter cavity and a water outlet column in the brewing head easily flows back to the brewing cavity, so that the coffee cake is very moist, bacteria are easy to breed if the coffee cake is not cleaned in time, the environment is polluted, and the hidden health trouble is generated.

Disclosure of Invention

In view of the above-mentioned technical problems in the prior art, the present utility model provides a brewing head, a coffee brewing mechanism and a coffee machine, wherein the brewing head can prevent residual liquid in a filter cavity and a water outlet column from flowing back to a brewing cavity in the coffee brewing mechanism.

The embodiment of the utility model provides a brewing head which is applied to a coffee brewing mechanism and comprises a screw rod and a piston,

a filter cavity and a slot communicated with the filter cavity are arranged in the piston, a water outlet column is arranged in the screw rod, and the water inlet end of the water outlet column extends into the slot;

an annular channel is formed between the inner wall of the slot and the outer wall of the water inlet end of the water outlet column, the filter cavity can be communicated with the outside through the annular channel, a sealing ring is arranged in the annular channel, the screw rod is movably connected with the piston, the piston can move between a first position and a second position relative to the screw rod along the axial direction of the screw rod, the piston is in the first position, and the sealing ring seals the annular channel so as to cut off the communication between the filter cavity and the outside; the piston is in the second position, and the sealing ring opens the annular channel so that the filter cavity is communicated with the outside.

Further, the slot comprises a first slot hole and a second slot hole along the axis direction of the water outlet column, a slot hole step surface is formed between the first slot hole and the second slot hole, the water inlet end of the water outlet column comprises a main body part positioned in the first slot hole and a guide part extending into the second slot hole, a water outlet column step surface is formed between the main body part and the guide part, the sealing ring is arranged between the slot hole step surface and the water outlet column step surface, and when the piston moves relative to the screw rod, the slot hole step surface and the water outlet column step surface are mutually close to or separated, so that the sealing ring seals or opens the annular channel. The structure can conveniently and rapidly open or close the annular channel.

Further, the sealing ring is fixed on the slotted hole step surface; or the sealing ring is sleeved on the guide part of the water outlet column and abuts against the step surface of the water outlet column.

Further, the end face of the first end of the screw rod is inwards sunken to form a cavity, the piston is provided with a mounting seat extending into the cavity, a connecting column is arranged on the mounting seat, the axis of the connecting column is parallel to the axis of the screw rod, a first abutting portion is arranged on the connecting column, a second abutting portion is arranged in the screw rod, when the piston is located at the first position, the first abutting portion is separated from the second abutting portion, and when the piston is located at the second position, the first abutting portion is abutted to the second abutting portion. Thus, the water inlet end of the water outlet column can be prevented from falling out of the slot on the piston.

Further, the end face of the second end of the screw rod is inwards recessed to form a sinking groove, the sinking groove is separated from the cavity by a partition plate arranged in the screw rod, the partition plate forms a first abutting part, a guide hole is formed in the partition plate, the connecting column penetrates through the guide hole, and the second abutting part is arranged at the free end of the connecting column. The piston can move along the axis of the screw rod in an oriented way through the matching of the connecting column and the guide hole.

Further, the free end of the connecting column is provided with a threaded hole, the second abutting part comprises a fixing screw which is in threaded connection with the threaded hole and a gasket which is arranged on the fixing screw, and the outer diameter of the gasket is larger than the inner diameter of the guide hole. The structure is simple, and the design is ingenious.

Further, a through hole for the water outlet column to pass through is formed in the middle of the partition plate; the water outlet column, the partition plate and the screw rod are of an integrated structure, so that the integrated processing is convenient.

Further, the outer peripheral wall of the water outlet column, the outer peripheral wall of the connecting column, the inner wall of the chamber and the upper surface of the mounting seat jointly define an air circulation cavity communicated with the annular channel, and the outer peripheral wall of the mounting seat is in clearance fit with the inner wall of the chamber and/or the outer peripheral wall of the connecting column and the inner wall of the guide hole so that the air circulation cavity is communicated with the outside.

The coffee brewing mechanism comprises a brewing seat, a brewing cavity arranged in the brewing seat, and a brewing head arranged at the top open end of the brewing cavity, wherein the top of the brewing cavity is open, and a driving mechanism rotationally connected with the screw rod is arranged in the brewing seat.

A coffee machine comprising a coffee brewing mechanism of any of the embodiments.

Compared with the prior art, the embodiment of the utility model has the beneficial effects that:

according to the embodiment of the utility model, the piston of the brewing head is movably connected with the screw rod, and the piston can move relative to the screw rod to enable the filter cavity in the piston to be communicated with the outside, so that when the brewing head moves in the coffee brewing mechanism, the pressure between the brewing cavity in the coffee brewing mechanism and the outside can be balanced, and the phenomenon that residual liquid in the filter cavity of the piston and the water outlet column of the screw rod flows back into the brewing cavity due to pressure difference is avoided, so that the water content of a coffee cake in the brewing cavity is increased.

Drawings

FIG. 1 is an exploded view of a brew head according to an embodiment of the present utility model;

FIG. 2 is a schematic perspective view of a brewing head according to the embodiment of the present utility model;

FIG. 3 is a cross-sectional view of a lead screw according to an embodiment of the utility model;

FIG. 4 is a cross-sectional view of a piston according to an embodiment of the present utility model;

FIG. 5 is a cross-sectional view of a piston in a brew head according to an embodiment of the utility model in a first position;

FIG. 6 is a cross-sectional view of a piston in a brew head according to an embodiment of the utility model in a second position;

FIG. 7 is a cross-sectional view of a coffee brewing mechanism of an embodiment of the present utility model;

FIG. 8 is a cross-sectional view of a coffee brewing mechanism of an embodiment of the present utility model with a brew head and a push head pressing a coffee cake;

figure 9 is a cross-sectional view of the coffee brewing mechanism with the brew head of an embodiment of the present utility model spaced away from the coffee pad.

The reference numerals in the drawings denote components:

1-a screw rod; 10-water outlet column; 11-a water outlet channel; 12-chamber; 13-a sink; 14-a main body; 15-a guide; 16-a separator; 17-a guide hole; 2-a piston; 20-mounting seats; 21-connecting posts, 22-first slots; 23-a second slot; 24-a base portion; 25-a filter chamber; 26-a filter screen; 3-fixing screws; 30-a guide rod part; 31-a limit part; 4-a gasket; 5-a sealing ring; 6-an annular channel; 7-an air circulation chamber; 8-brewing base; 80-coffee cake; 81-a brewing chamber; 9-pushing the powder head.

Detailed Description

In order to enable those skilled in the art to better understand the technical solutions of the embodiments of the present utility model, the present utility model is described in detail below with reference to the accompanying drawings and detailed description.

The embodiment of the utility model provides a brewing head which is applied to a coffee brewing mechanism. As shown in fig. 1-2, the brewing head mainly comprises a screw rod 1 and a piston 2. The piston 2 is provided with a filter cavity 25 and a slot communicated with the filter cavity 25, as shown in fig. 4. A water outlet column 10 is arranged in the screw rod 1, and the water inlet end of the water outlet column 10 extends into the slot.

As shown in fig. 5 and 6, an annular channel 6 is formed between the inner wall of the slot and the outer wall of the water inlet end of the water outlet column 10 in this embodiment, and the filter cavity 25 is communicated with the outside through the annular channel 6. The annular channel 6 is internally provided with a sealing ring 5, the screw rod 1 is movably connected with the piston 2, and the piston 2 can move between a first position and a second position relative to the screw rod 1 along the axial direction of the screw rod 1. The outside of this embodiment refers to the outside of the screw 1, and the air pressure of the outside is equal to the atmospheric pressure.

As shown in fig. 5, when the piston 2 is in the first position, the sealing ring 5 seals the annular channel 6, thereby intercepting the communication of the filter chamber 25 with the outside.

As shown in fig. 6, when the piston 2 is in the second position, the sealing ring 5 opens the annular channel 6, thereby allowing the filter chamber 25 to communicate with the outside.

The piston 2 of the brewing head provided in this embodiment is movably connected with the screw 1, and the piston 2 can move relative to the screw 1 to balance the pressure between the brewing chamber 81 and the outside in the coffee brewing mechanism, so as to avoid the backflow of the residual liquid in the filtering chamber 25 on the piston 2 and the water outlet column 10 in the screw 1 to the brewing chamber 81 due to the pressure difference, thereby increasing the water content of the coffee cake 80 in the brewing chamber 81 in the coffee brewing mechanism.

In some embodiments, as shown in fig. 4, the slot includes a first slot 22 and a second slot 23 along the axial direction of the water outlet column 10, the second slot 23 communicates with the brewing chamber 25 in the coffee brewing mechanism, the aperture of the first slot 22 is larger than the aperture of the second slot 23, and a slot step surface is formed between the first slot 22 and the second slot 23. As shown in fig. 3, the water inlet end of the water outlet column 10 includes a main body 14 located in the first slot 22 and a guiding portion 15 extending into the second slot 23, and a water outlet column step surface is formed between the main body 14 and the guiding portion 15.

Further, when the water inlet end of the water outlet column 10 of the present embodiment extends into the slot, the water outlet column step surface is opposite to the slot step surface, and the sealing ring 5 is disposed between the water outlet column step surface and the slot step surface, and when the piston 2 moves relative to the screw 1, the water outlet column step surface and the slot step surface are close to or separated from each other, so as to squeeze or release the sealing ring 5 to seal or open the annular channel 6.

Specifically, when the piston 2 moves relative to the screw rod 1 so that the slotted hole step surface is close to the water outlet column step surface, the sealing ring 5 is extruded, and the annular channel 6 is blocked at the moment; when the piston 2 moves relative to the screw 1 so that the slotted hole step surface is far away from the water outlet column 10 step surface, the sealing ring 5 is released, and the annular channel 6 is opened.

Alternatively, the sealing ring 5 may be fixed on the notch step surface, or the sealing ring 5 may also be sleeved on the guiding portion 15 of the water outlet column 10 and abuts against the water outlet column step surface.

In some embodiments, as shown in fig. 3, the end surface of the bottom end of the lead screw 1 is recessed inward to form a cavity 12. As shown in fig. 4, the piston 2 includes a piston seat 24 and a mounting seat 20 formed by upwardly projecting the top of the piston seat 24, the mounting seat 20 extending into the chamber 12 of the screw 1, the mounting seat 20 being provided with a connecting post 21, the axis of the connecting post 21 being parallel to the axis of the screw 1.

Further, the connecting column 21 of the present embodiment is provided with a first abutting portion, and the screw 1 is provided with a second abutting portion. When the piston 2 is in the first position, the first abutment on the connecting post 21 is separated from the second abutment in the screw 1. When the piston 2 is in the second position, the second abutting portion of the connecting post 21 abuts against the second abutting portion of the screw 1, thereby preventing the water outlet column 10 from being pulled out of the slot.

It should be noted that, when the piston 2 is in the first position, the end surface of the bottom end of the screw rod 1 may abut against the piston seat 2, so as to avoid the piston 2 from moving relative to the screw rod 2 to excessively squeeze the sealing ring 6.

In some embodiments, as shown in fig. 3, the end surface of the top end of the screw 1 is recessed inward to form a sink 13, and a partition 16 perpendicular to the axis of the screw 1 is provided in the screw 1, and the partition 16 separates the sink 13 from the chamber 12. The baffle 16 forms the first butt portion in the lead screw 1, is equipped with guiding hole 17 on the baffle 16, and spliced pole 21 wears to locate in the guiding hole 17, and the second butt portion sets up the free end at spliced pole 21, can guarantee through the cooperation of spliced pole 21 and guiding hole 17 that piston 2 can follow the directional removal of axis of lead screw 1.

Further, as shown in fig. 5 and 6, the free end of the connecting post 21 is provided with a threaded hole, and the second abutment provided on the free end of the connecting post 21 includes a fixing screw 3 screwed into the threaded hole and a spacer 4 provided on the fixing screw 3, the outer diameter of the spacer 4 being larger than the inner diameter of the guide hole 17. When the piston 2 is in the second position, it can abut the diaphragm 16 via the gasket 4.

In some embodiments, as shown in fig. 3, a through hole is formed in the middle of the partition plate 16 to allow the water outlet column 10 to pass through, and the water outlet column 10, the partition plate 16 and the screw 1 are integrally formed, so that overall processing can be facilitated.

In some embodiments, as shown in fig. 5 and 6, the outer peripheral wall of the water column 10, the outer peripheral wall of the connecting column 21, the inner wall of the chamber 12, and the upper surface of the mount 20 together define an air circulation chamber 7 communicating with the annular channel 6.

The outer peripheral wall of the mounting base 20 of the present embodiment is in clearance fit with the inner wall of the chamber 12 and the outer peripheral wall of the connecting post 21 and the inner wall of the guide hole 17, so that the communication between the air circulation chamber 7 and the outside can be ensured, and the communication between the brewing chamber 81 in the coffee brewing mechanism and the outside can be ensured when the piston 2 is in the second position.

As shown in fig. 7, the embodiment of the present utility model further provides a coffee brewing mechanism, which includes a brewing base 8 and a brewing chamber 81 disposed in the brewing base 8, and as shown in fig. 9, the top and bottom of the brewing chamber 81 are both open, and further includes a brewing head and a powder pushing head 9 according to any one of the embodiments, wherein the brewing head is vertically disposed at the top open end of the brewing chamber 81, and the powder pushing head 9 is vertically disposed at the bottom open end of the brewing chamber 81. The brewing seat 8 is internally provided with a driving mechanism for respectively driving the brewing head and the powder pushing head 9 to be close to or far away from each other. The driving mechanism is respectively connected with the lead screw 1 of the brewing head and the lead screw of the powder pushing head 9 through a transmission mechanism.

As shown in fig. 8, when brewing coffee, the push head 9 and the brewing head are respectively driven to approach each other to press the coffee cake 80 in the brewing chamber 81, and then hot water is injected into the brewing chamber 81 through the push head 9 to brew the coffee, and the brewed coffee is discharged through the filtering chamber 25 of the brewing head and the liquid outlet passage in the water outlet column 10.

It should be noted that, since the pushing head 9 pushes the coffee cake 80 to move upwards, the piston 2 of the brewing head is pressed to move upwards to the first position, the annular channel 6 is blocked, so as to ensure that the coffee can be discharged through the water outlet column 10.

As shown in fig. 9, after the coffee is brewed, the screw 1 of the brew head is driven to move upward, and the piston 2 is not moved during its upward movement, so that the screw 1 moves relative to the piston 2. When the screw rod 1 moves upwards relative to the piston 2, the annular channel 6 is opened, the brewing cavity 81 is communicated with the outside, and therefore liquid cannot remain in the filter cavity 25 of the piston 2 and the water outlet column 10, and the residual liquid is prevented from flowing back into the brewing cavity 81.

The coffee brewing mechanism provided by the embodiment can eliminate the pressure difference between the brewing cavity 81 and the outside of the brewing seat in the moving process of the brewing head after the coffee is brewed, so that the liquid remained in the brewing head is prevented from flowing back into the brewing cavity 81.

The embodiment of the utility model also provides a coffee machine, which comprises the coffee brewing mechanism according to any embodiment.

The above embodiments are only exemplary embodiments of the present utility model and are not intended to limit the present utility model, the scope of which is defined by the claims. Various modifications and equivalent arrangements of this utility model will occur to those skilled in the art, and are intended to be within the spirit and scope of the utility model.

Claims (10)

1. The brewing head is applied to a coffee brewing mechanism and comprises a screw rod (1) and a piston (2), wherein a filter cavity (25) and a slot communicated with the filter cavity (25) are arranged in the piston (2), a water outlet column (10) is arranged in the screw rod (1), the water inlet end of the water outlet column (10) stretches into the slot, and the coffee brewing mechanism is characterized in that,

an annular channel (6) is formed between the inner wall of the slot and the outer wall of the water inlet end of the water outlet column (10), the filter cavity (25) can be communicated with the outside through the annular channel (6), a sealing ring (5) is arranged in the annular channel (6), the screw rod (1) is movably connected with the piston (2), the piston (2) can move between a first position and a second position relative to the screw rod (1) along the axial direction of the screw rod (1), the piston (2) is in the first position, and the sealing ring (5) seals the annular channel (6) so as to cut off the communication between the filter cavity (25) and the outside; the piston (2) is in the second position, and the sealing ring (5) opens the annular channel (6) so that the filter cavity (25) is communicated with the outside.

2. A brewing head according to claim 1, wherein the slot comprises a first slot (22) and a second slot (23) along the axial direction of the water outlet column (10), a slot step surface is formed between the first slot (22) and the second slot (23), the water inlet end of the water outlet column (10) comprises a main body part (14) positioned in the first slot (22) and a guide part (15) extending into the second slot (23), a water outlet column step surface is formed between the main body part (14) and the guide part (15), the sealing ring (5) is arranged between the slot step surface and the water outlet column step surface, and when the piston (2) moves relative to the screw rod (1), the slot step surface and the water column step surface are mutually close to or separated so that the sealing ring (5) seals or opens the annular channel (6).

3. A brewing head according to claim 2, characterized in that said sealing ring (5) is fixed on said slotted step surface; or, the sealing ring (5) is sleeved on the guide part (15) of the water outlet column (10) and is propped against the step surface of the water outlet column.

4. A brewing head according to claim 2, characterized in that the end face of the first end of the screw (1) is recessed inwards to form a chamber (12), the piston (2) has a mounting seat (20) extending into the chamber (12), the mounting seat (20) is provided with a connecting column (21), the axis of the connecting column (21) is parallel to the axis of the screw (1), the connecting column (21) is provided with a first abutment, the screw (1) is provided with a second abutment, the first abutment and the second abutment are separated when the piston (2) is in the first position, and the first abutment and the second abutment are abutted when the piston (2) is in the second position.

5. A brewing head according to claim 4, characterized in that the end face of the second end of the screw (1) is recessed inwards to form a sink (13), the sink (13) is separated from the cavity (12) by a partition (16) arranged in the screw (1), the partition (16) forms the first abutting part, the partition (16) is provided with a guide hole (17), the connecting column (21) is arranged in the guide hole (17) in a penetrating way, and the second abutting part is arranged at the free end of the connecting column (21).

6. A brew head according to claim 5, characterised in that the free end of the connecting post (21) is provided with a threaded hole, the second abutment comprising a fixing screw (3) screwed in the threaded hole and a spacer (4) arranged on the fixing screw (3), the outer diameter of the spacer (4) being larger than the inner diameter of the guide hole (17).

7. A brewing head according to claim 5, characterized in that the middle of the partition (16) is provided with a through hole for the water column (10) to pass through; the water outlet column (10), the partition plate (16) and the screw rod (1) are of an integrated structure.

8. A brewing head according to claim 5, characterized in that the peripheral wall of the water outlet column (10), the peripheral wall of the connecting column (21), the inner wall of the chamber (12) and the upper surface of the mounting seat (20) together define an air circulation cavity (7) communicating with the annular channel (6), the peripheral wall of the mounting seat (20) being in clearance fit with the inner wall of the chamber (12) and/or the peripheral wall of the connecting column (21) and the inner wall of the guiding hole (17) so as to communicate the air circulation cavity (7) with the outside.

9. A coffee brewing mechanism comprising a brewing seat (8) and a brewing cavity (80) arranged in the brewing seat (8), wherein the top of the brewing cavity (80) is open, characterized in that the coffee brewing mechanism further comprises a brewing head according to any one of the preceding claims 1-8, the brewing head is arranged at the top open end of the brewing cavity (80), and a driving mechanism rotationally connected with the screw (1) is arranged in the brewing seat (8).

10. A coffee machine, characterized in that it comprises a coffee brewing mechanism according to claim 9.