CN210748788U

CN210748788U - Pressure relief device of capsule coffee machine and capsule coffee machine

Info

Publication number: CN210748788U
Application number: CN201921208395.9U
Authority: CN
Inventors: 周新
Original assignee: Dongguan Youniya Electronic Science And Technology Co ltd
Current assignee: Dongguan Youniya Electronic Science And Technology Co ltd
Priority date: 2019-07-29
Filing date: 2019-07-29
Publication date: 2020-06-16
Anticipated expiration: 2029-07-29

Abstract

The utility model discloses a pressure relief device of a capsule coffee machine and the capsule coffee machine, relating to the technical field of coffee machines, wherein the pressure relief device of the capsule coffee machine comprises an upper cover, a main water pipe, a pressure relief pipe, a water inlet pipe, a compression device, a motor, a transmission mechanism and a rotating part; the rotating piece is provided with a first bulge and a second bulge, the upper cover is provided with a groove and an arc-shaped through hole, and the two bulges slide in the arc-shaped through hole; when the rotating part rotates to a first position under the driving of the motor, the first bulge compresses the pressure relief pipe, the pressure relief loop is closed, the second bulge compresses the compression device, and the water inlet loop is opened; when the water inlet loop rotates to the second position, the first bulge is far away from the pressure relief pipe, the pressure relief loop is opened, the second bulge is far away from the compression device, and the water inlet loop is closed. So set up, adopt the condition that the drip or splash appear after coffee machine uses in the mechanical principle pressure release, and mechanical structure is simple, and low cost has solved among the prior art problem that capsule coffee machine's pressure relief device cost is expensive and the structure is complicated.

Description

Pressure relief device of capsule coffee machine and capsule coffee machine

Technical Field

The utility model relates to a coffee machine technical field, more specifically say, relate to capsule coffee machine's pressure relief device and capsule coffee machine.

Background

Along with the improvement of living standard of people, coffee is more and more popular among consumers, the coffee drinking becomes a fashion of life of people, especially for coffee enthusiasts, the working efficiency of the coffee is greatly improved by one cup of coffee with strong aroma and good taste, and the capsule coffee machine is used as a machine for brewing coffee, has simple operation and reliable work and is very widely applied.

In the prior art, after the capsule coffee machine makes coffee, steam pressure exists in the coffee machine, the steam pressure can extrude residual water in the coffee machine outwards, and a coffee outlet of the coffee machine can drip water, so that inconvenience is brought to a user. In order to solve the problem that the water does not drip after the coffee is made, the existing coffee machine adopts an electromagnetic valve to relieve pressure, and although the problem of dripping is solved, the electromagnetic valve is expensive in manufacturing cost and complex in structure.

Therefore, how to solve the problems of expensive manufacturing cost and complex structure of the pressure relief device of the capsule coffee machine in the prior art becomes an important technical problem to be solved by the technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pressure relief device and capsule coffee machine of capsule coffee machine solves the technical problem that the pressure relief device cost that has capsule coffee machine among the prior art is expensive and the structure is complicated. The utility model provides a plurality of technical effects that preferred technical scheme among a great deal of technical scheme can produce see the explanation below in detail.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a pressure relief device of a capsule coffee machine, which comprises an upper cover, a main water pipe arranged on the upper cover, a pressure relief pipe which is connected with the main water pipe and can be pressed to deform so as to be blocked, a water inlet pipe which is connected with the main water pipe and can be pressed to deform so as to be blocked, a pressing device which is arranged on the water inlet pipe and is used for pressing the water inlet pipe, a motor, a transmission mechanism connected with the motor and a rotating part connected with the transmission mechanism; the rotating piece is provided with a first bulge and a second bulge, the upper cover is provided with a groove for placing the pressure relief pipe and the water inlet pipe and an arc-shaped through hole extending along the motion tracks of the first bulge and the second bulge, and the first bulge and the second bulge extend into the arc-shaped through hole and are in sliding fit with the arc-shaped through hole; under the drive of motor, when rotating the piece and rotating when the first position, first arch oppression the pressure release pipe, the pressure release pipe return circuit is closed, the second arch compresses tightly oppression device, the inlet tube return circuit is opened, works as when rotating the piece and rotating the second position, first arch is kept away from the pressure release pipe, the pressure release pipe return circuit is opened, the second arch is kept away from oppression device, the inlet tube return circuit is closed.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Furthermore, a hollow shaft and a brewing device support with a cylindrical cavity with openings at the upper end and the lower end are arranged below the transmission mechanism, the hollow shaft is rotatably arranged in the cylindrical cavity, a brewing device capable of rotating relatively is arranged in the cavity of the hollow shaft, and a coffee hopper for placing capsule coffee is detachably arranged below the brewing device support; one end of the water inlet pipe is connected to the main water pipe, the other end of the water inlet pipe penetrates through the upper cover, the transmission mechanism and the hollow shaft are fixed to the brewing device, an opening is formed in the lower end of the brewing device, a sliding groove extending along the upper end and the lower end of the cavity is formed in the side wall of the brewing device support, a penetrating groove which penetrates through the side wall in the thickness direction and gradually spirally rises along the circumferential direction of the hollow shaft is formed in the side wall of the hollow shaft, a columnar protrusion is arranged on the side wall of the brewing device, penetrates through the penetrating groove and is in sliding fit with the sliding groove, when the rotating piece rotates to the first position, the lower end face of the brewing device presses the coffee hopper tightly, and when the rotating piece rotates to the second position, the lower end face of the brewing device is separated from the coffee hopper.

Furthermore, drive mechanism includes the driving gear and has the driven gear of the equal open-ended cylindrical cavity of upper and lower extreme, it fixes to rotate the piece in driven gear's cavity, it fixes to rotate the piece the hollow shaft upper end, the motor with the driving gear is connected, the driving gear with driven gear meshes mutually.

Furthermore, the pressing device comprises a base body, a rotating body and a spring, wherein the rotating body and the spring are rotatably arranged on the base body through a cylindrical short shaft, a through long hole is formed in the middle of the rotating body, the base body is provided with a cavity structure which is provided with an opening at the side part and is used for placing a through hole of the water inlet pipe, through holes used for fixing the short shaft are formed in two sides of the cavity structure of the base body, the short shaft penetrates through the long hole and is fixed in the through hole, an arc-shaped bulge and a block-shaped bulge are respectively arranged at different sides of two ends of the rotating body and are used for pressing the water inlet pipe, and the block-shaped; one end of the spring is arranged on the rotating body, and the other end of the spring is arranged on the base body; when the protruding contact oppression of second during the cubic is protruding, the arc arch breaks away from the inlet tube, the spring produces elastic deformation, produces the tensile force, works as the second arch breaks away from during the cubic is protruding, the tensile force that the spring produced will the protruding initial position that pulls back of arc oppresses the inlet tube.

Furthermore, two ends of the short shaft are arranged in the through hole on the base body in an interference fit mode.

Furthermore, one side of the first bulge, which is in contact with the pressure relief pipe, is of an arc-shaped structure.

Furthermore, a forward switch and a reverse switch for controlling the forward and reverse rotation of the motor are arranged on the upper cover.

Further, the rotating member, the driven gear, the hollow shaft and the brewer are all of a cylindrical structure and are concentrically arranged in a cylindrical cavity of the brewer bracket.

Furthermore, a placing groove for the coffee hopper to slide in the brewing device support is arranged below the brewing device support.

The utility model also provides a capsule coffee machine, including foretell capsule coffee machine's pressure relief device.

In the technical scheme provided by the utility model, the pressure relief device of the capsule coffee machine comprises an upper cover, a main water pipe arranged on the upper cover, a pressure relief pipe and a water inlet pipe which are connected with the main water pipe and can be pressed and deformed so as to be blocked, a pressing device arranged on the water inlet pipe and used for pressing the water inlet pipe, a motor, a transmission mechanism connected with the motor and a rotating part connected with the transmission mechanism; the rotating piece is provided with a first bulge and a second bulge, the upper cover is provided with a groove for placing the pressure relief pipe and the water inlet pipe and an arc-shaped through hole extending along the motion tracks of the first bulge and the second bulge, and the first bulge and the second bulge extend into the arc-shaped through hole and are in sliding fit with the arc-shaped through hole; under the drive of motor, when rotating the piece and rotating the primary importance, first arch oppression pressure release pipe makes the pressure release return circuit close, and the second arch compresses tightly compressor arrangement and makes the return circuit of intaking open, and when rotating the piece and rotating the secondary importance, the pressure release pipe is kept away from to first arch, and the pressure release return circuit is opened, and the compressor arrangement is kept away from to the second arch, and the return circuit of intaking closes. So set up, adopt the mode of mechanical principle pressure release to avoid the capsule coffee machine to appear the condition of water clock or splash after using, and this pressure relief device's mechanical structure is simple, can practice thrift the cost, has solved the problem that the pressure relief device cost of capsule coffee machine is expensive and the structure is complicated among the prior art.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of an explosion structure of a pressure relief device of a capsule coffee machine according to an embodiment of the present invention;

FIG. 2 is a schematic view of an exploded structure of a capsule coffee machine according to an embodiment of the present invention;

fig. 3 is an exploded view of a compression device according to an embodiment of the present invention;

FIG. 4 is a schematic structural view illustrating a pressure relief device of a capsule coffee maker according to an embodiment of the present invention in a pressure relief state;

fig. 5 is a schematic structural view of a pressure relief device of a capsule coffee machine in a water inlet state according to an embodiment of the present invention.

In the figure, 1-a main water pipe, 2-an upper cover, 3-a pressure relief pipe, 4-a water inlet pipe, 5-a forward switch, 6-a pressing device, 7-a reverse switch, 8-a transmission mechanism, 9-a driving gear, 10-a driven gear, 11-a rotating piece, 12-a motor, 13-a hollow shaft, 14-a brewing device, 15-a brewing device bracket, 16-a coffee hopper, 21-an arc-shaped through hole, 61-a short shaft, 62-a spring, 63-a rotating body, 64-a base body, 111-a first bulge, 112-a second bulge, 131-a through groove, 141-a columnar bulge, 151-a sliding groove, 152-a placing groove, 631-a long hole, 632-a block-shaped bulge, 633-an arc-bulge and 641-a through hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The purpose of this embodiment is to provide pressure relief device and capsule coffee machine of capsule coffee machine, adopts the mode of mechanical principle pressure relief, avoids the capsule coffee machine to appear the condition of drippage or splash after using, and simple structure, the cost is lower, solves among the prior art problem that the pressure relief device cost of capsule coffee machine is expensive and the structure is complicated.

Hereinafter, embodiments will be described with reference to the drawings. The embodiments described below do not limit the scope of the invention described in the claims. Further, the entire contents of the configurations shown in the following embodiments are not limited to those necessary as a solution of the invention described in the claims.

Referring to fig. 1-5, the pressure relief device of the capsule coffee maker of the present embodiment includes an upper cover 2, a main water pipe 1 disposed at one end of the upper cover 2 for providing hot water, a pressure relief pipe 3 connected to the main water pipe 1 and capable of being compressed and deformed to block the main water pipe, a water inlet pipe 4 connected to the main water pipe 1 and capable of being compressed and deformed to block the main water pipe, a compressing device 6 disposed on the water inlet pipe 4 for compressing the water inlet pipe 4, a motor 12, a transmission mechanism 8 connected to the motor 12, and a rotating member 11 connected to the transmission mechanism 8.

It should be noted that one end of the main water pipe 1 is connected to an external water supply system, and the other end is divided into two branches, which are respectively connected to the water inlet pipe 4 and the pressure relief pipe 3, and the water inlet pipe 4 and the pressure relief pipe 3 are made of rubber pipes, or other elastic materials, as long as they have the characteristic that they can be pressed to deform and thus can be blocked.

Wherein, oppression device 6 passes through the screw fixation on upper cover 2, oppression device 6 can make inlet tube 4 warp, thereby block the water return circuit, be equipped with first arch 111 and second arch 112 on the rotation piece 11, upper cover 2 is equipped with recess and the arc through-hole 21 that is used for placing pressure release pipe 3 and inlet tube 4, the movement track direction of first arch 111 and the second arch 112 of edge of arc through-hole 21 extends, first arch 111 and second arch 112 stretch into in the arc through-hole 21, and sliding fit with it.

When motor 12 rotates, make through drive mechanism 8 and rotate a piece 11 and rotate, when rotating a piece 11 and rotating to the primary importance, first arch 111 oppresses pressure release pipe 3, make pressure release circuit close, the protruding 112 extrusion oppression compressor arrangement 6 of second simultaneously, inlet tube 4 return circuit is opened, hot water flows in through main water pipe 1 and takes in water inlet pipe 4, the capsule coffee that flows in at last, when rotating to the secondary importance, compressor arrangement 6 is kept away from to second arch 112, compressor arrangement 6 resets, water inlet circuit is closed, main water pipe 1 closes this moment, pressure release pipe 3 is kept away from to first arch 111, pressure release circuit opens, let out the steam pressure in main water pipe 1 and the inlet tube 4 through pressure release pipe 3.

So set up, under the drive of motor 12, make through drive mechanism 8 and rotate piece 11 and rotate, realize that first arch 111 and second arch 112 are direct respectively or indirect controls pressure release return circuit and water inlet circuit, adopt the mode pressure release of mechanical principle, simple structure, low cost has solved among the prior art problem that capsule coffee machine's pressure relief device cost is expensive and the structure is complicated.

As an alternative embodiment, a hollow shaft 13 and a brewing device support 15 with a cylindrical cavity with an opening at the upper end and the lower end are arranged below the transmission mechanism 8, a groove for placing the transmission mechanism 8 and the motor 12 is further arranged on the brewing device support 15, the hollow shaft 13 is rotatably arranged inside the cylindrical cavity of the brewing device support 15, a brewing device 14 which can rotate relative to the hollow shaft 13 is arranged inside the hollow shaft 13, and a coffee funnel 16 for placing capsule coffee is detachably arranged below the brewing device support 15.

Wherein, the upper cover 2, the transmission mechanism 8 and the hollow shaft 13 are all provided with via holes for the water inlet pipe 4 to pass through, one end of the water inlet pipe 4 is connected to the main water pipe 1, the other end passes through the upper cover 2, the transmission mechanism 8 and the hollow shaft 13, and is finally connected to the brewing device 14, the lower end of the brewing device 14 is provided with an opening for hot water to flow out, the side wall of the cavity of the brewing device support 15 is provided with a chute 151 extending along the upper end and the lower end, the side wall of the hollow shaft 13 is provided with a through groove 131 penetrating through the side wall in the thickness direction and gradually spirally rising along the circumferential direction of the hollow shaft 13, the side wall of the brewing device is provided with a columnar bulge 141.

When the motor 12 rotates, the transmission mechanism 8 is driven to rotate the hollow shaft 13, the hollow shaft 13 is fixed in the horizontal direction and cannot move up and down, the columnar protrusion 141 slides from one end to the other end of the through groove 131 on the hollow shaft 13, the brewing device 14 moves relative to the hollow shaft 13, however, the columnar protrusion 141 is positioned in the sliding groove 151 of the brewing device support 15, and therefore, the columnar protrusion 141 can only move up and down along the sliding groove 151; when the columnar projection 141 slides along the slide groove 151 to the first position, the lower end surface of the brewer 14 presses the coffee hopper 16, and when the columnar projection 141 slides along the slide groove 151 to the second position, the lower end surface of the brewer 14 is separated from the coffee hopper 16.

So set up, under the drive of motor 12, through drive mechanism 8 and rotation piece 11, can realize on the one hand the control to pressure release return circuit and water inlet circuit, reach mechanical pressure release, on the other hand under the condition that this pressure release mechanism exists, provide one kind with pressure relief device assorted be used for with capsule coffee crush, and brew into the mechanism of coffee.

In a more specific embodiment, the transmission mechanism 8 comprises a driving gear 9 and a driven gear 10 with a cylindrical cavity with openings at the upper end and the lower end, a rotating part 11 is arranged in the cavity of the driven gear 10 in a welding mode, the upper end of a hollow shaft 13 is welded with the lower end of the rotating part 11, a motor shaft of a motor 12 is connected with the middle part of the driving gear 9 through a flat key, the driving gear 9 and the driven gear 10 are positioned on the same horizontal plane, and the driving gear 9 and the driven gear 10 are ensured to be meshed without gear disengagement; in the present embodiment, the transmission mechanism 8 is a gear transmission, and in other embodiments, it may be a synchronous belt transmission or a cam transmission, etc. So set up, gear drive structure compares 8 stable, firm of other drive mechanism structures.

In a further embodiment, the pressing device 6 comprises a base 64, a rotary body 63 rotatably arranged on the base 64 by means of a cylindrical stub shaft 61, and a spring 62; the middle part of the rotating body 63 is provided with a through long hole 631, the long hole 631 can be penetrated by the short shaft 61, the base body 64 has a cavity structure with a side opening and a through hole for placing the water inlet pipe 4, through holes 641 for fixing the short shaft 61 are arranged at two sides of the cavity of the base body 64, the short shaft 61 is fixed in the through hole 641 on the base body 64 through the long hole 631 on the rotating body 63, and the rotating body 63 can be rotatably arranged in the cavity of the base body 64; the arc-shaped protrusion 633 and the block-shaped protrusion 632 for pressing the water inlet pipe 4 are respectively arranged at different sides of the two ends of the rotating body 63, and the block-shaped protrusion 632 and the second protrusion 112 can be pressed and separated.

Wherein, spring 62 one end sets up the one end that has arc arch 633 at the rotator 63, and the other end sets up the position that corresponds with it at base member 64, when the massive arch 632 of second arch 112 contact oppression, arc arch 633 breaks away from inlet tube 4, and the water circuit is opened, and spring 62 produces elastic deformation this moment, produces the pulling force of spring 62 to rotator 63 and base member 64, breaks away from massive arch 632 when second arch 112, because the pulling force that spring 62 produced, with arc 633 pull back home position, inlet tube 4 is oppressed, and the water circuit that intakes closes.

With the arrangement of the spring 62, when the second protrusion 112 is far away from the block-shaped protrusion 632, the pressing device 6 can return to the original position by itself without manual intervention.

In a further embodiment, both ends of the short shaft 61 are fitted into the through holes 641 of the base 64 with interference, both ends of the short shaft 61 are slightly thicker than the middle portion, and the middle portion is fitted into the long hole 631 of the rotating body 63 with clearance. So set up, minor axis 61 is fixed, can not follow rotator 63 and rotate, guarantees that the rotatory in-process of rotator 63, and the condition that the minor axis 61 can not appear dropping.

As an alternative embodiment, one side of the joint of the first protrusion 111 and the pressure relief pipe 3 is an arc-shaped structure, in this embodiment, one side of the joint is an arc-shaped structure, and in other embodiments, the joint may also be a planar structure or a polygonal structure, etc. So set up to the arc structure can effectual protection pressure release pipe 3 can not be easily damaged increase of service life.

In a further embodiment, the upper cover 2 is provided with a forward switch 5 and a reverse switch 7 for controlling the forward and reverse rotation of the motor 12, and is further provided with mounting grooves for placing the forward switch 5 and the reverse switch 7, the forward switch 5 and the reverse switch 7 are both fixed on the upper cover 2 through limiting pins and screws, and the forward switch 5 and the reverse switch 7 are both connected with the motor 12 in a communication manner. So set up, when touching forward switch 5, motor 12 corotation realizes that the return circuit of intaking closes and the pressure release return circuit opens, when touching reverse switch 7, motor 12 reversal realizes that the return circuit of intaking opens and the pressure release return circuit closes.

As an alternative embodiment, the rotating member 11, the driven gear 10, the hollow shaft 13 and the brewer 14 are all of a cylindrical structure, and the four are concentrically arranged in a cylindrical cavity of the brewer bracket 15, the driven gear 10 takes the hollow shaft 13 as a rotating shaft, and the hollow shaft 13 is in clearance fit with the cavity of the brewer bracket 15, so that the hollow shaft 13 stably rotates under the constraint action of the brewer bracket 15. So set up, cylindrical structure rotates more smoothly, all sets up in the cavity of brewing ware support 15 with one heart, has guaranteed driven stability.

In a further embodiment, a placement groove 152 is provided below the brewer frame 15 for the coffee hopper 16 to slide in the brewer frame 15, the cross section of the placement groove 152 is rectangular, the placement groove 152 is only used for placing the upper half part of the coffee hopper 16, the lower part of the placement groove 152 is open, and the lower half part of the coffee hopper 16 is placed at the opening of the placement groove 152. So set up, the coffee fill 16 is removable places in the below of the brewer support 15, conveniently changes capsule coffee.

The embodiment also provides the capsule coffee machine, which comprises the pressure relief device of the capsule coffee machine. The embodiment provides a capsule coffee machine, under the drive of motor 12, drive and rotate piece 11, by two archs on rotating piece 11 and the compressor arrangement 6 on the upper cover 2, realize the on-off control to pressure release pipe 3 and inlet tube 4, adopt the mode of mechanical principle, simple structure, low cost has solved among the prior art capsule coffee machine's pressure relief device cost is expensive and the structure is complicated. The derivation process of the beneficial effect is substantially similar to the derivation process of the beneficial effect brought by the packing device of the capsule coffee machine, and therefore, the description is omitted.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The pressure relief device of the capsule coffee machine is characterized by comprising an upper cover (2), a main water pipe (1) arranged on the upper cover (2), a pressure relief pipe (3) which is connected with the main water pipe (1) and can be pressed to deform so as to block the main water pipe, a water inlet pipe (4) which is connected with the main water pipe (1) and can be pressed to deform so as to block the main water pipe, a pressing device (6) which is arranged on the water inlet pipe (4) and is used for pressing the water inlet pipe (4), a motor (12), a transmission mechanism (8) connected with the motor (12) and a rotating part (11) connected with the transmission mechanism (8); a first bulge (111) and a second bulge (112) are arranged on the rotating piece (11), a groove for placing the pressure relief pipe (3) and the water inlet pipe (4) and an arc-shaped through hole (21) extending along the movement tracks of the first bulge (111) and the second bulge (112) are formed in the upper cover (2), and the first bulge (111) and the second bulge (112) extend into the arc-shaped through hole (21) and are in sliding fit with the arc-shaped through hole (21); under the drive of motor (12), when rotate piece (11) and rotate when the primary importance, first arch (111) oppression pressure release pipe (3), pressure release pipe (3) return circuit is closed, the protruding (112) of second compresses tightly compressor arrangement (6), inlet tube (4) return circuit is opened, works as when rotate piece (11) and rotate the secondary importance, first arch (111) are kept away from pressure release pipe (3), pressure release pipe (3) return circuit is opened, protruding (112) of second is kept away from compressor arrangement (6), inlet tube (4) return circuit is closed.

2. The pressure relief device of a capsule coffee machine according to claim 1, characterized in that a hollow shaft (13) and a brewer holder (15) having a cylindrical cavity with an opening at the upper end and the lower end are arranged below the transmission mechanism (8), the hollow shaft (13) is rotatably arranged in the cylindrical cavity, a brewer (14) capable of rotating relatively is arranged in the cavity of the hollow shaft (13), and a coffee hopper (16) for placing capsule coffee is detachably arranged below the brewer holder (15); one end of the water inlet pipe (4) is connected to the main water pipe (1), the other end of the water inlet pipe penetrates through the upper cover (2), the transmission mechanism (8) and the hollow shaft (13) are fixed on the brewing device (14), the lower end of the brewing device (14) is provided with an opening, the side wall of a cavity of the brewing device support (15) is provided with a sliding groove (151) extending along the upper end and the lower end of the cavity, the side wall of the hollow shaft (13) is provided with a penetrating groove (131) penetrating the side wall along the thickness direction and gradually spirally rising along the circumferential direction of the hollow shaft (13), the side wall of the brewing device (14) is provided with a columnar bulge (141), the columnar bulge (141) penetrates through the penetrating groove (131) and is in sliding fit with the sliding groove (151), and when the rotating member (11) rotates to a first position, the lower end face of the brewing device (14) presses the coffee hopper (16), when the rotating member (11) is rotated to a second position, the lower end surface of the brewer (14) is disengaged from the coffee hopper (16).

3. The pressure relief device of a capsule coffee machine according to claim 2, characterized in that said transmission mechanism (8) comprises a driving gear (9) and a driven gear (10) having a cylindrical cavity with an upper end and a lower end both open, said rotating member (11) is fixed in the cavity of said driving gear (9), said rotating member (11) is fixed at the upper end of said hollow shaft (13), said motor (12) is connected with said driving gear (9), said driving gear (9) is meshed with said driven gear (10).

4. The pressure relief device of a capsule coffee machine according to claim 1, characterized in that the pressing device (6) comprises a base body (64), a rotating body (63) rotatably arranged on the base body (64) through a cylindrical short shaft (61) and a spring (62), the middle part of the rotating body (63) is provided with a through long hole (631), the base body (64) has a cavity structure with a side opening and a through hole for placing the water inlet pipe (4), both sides of the cavity structure of the base body (64) are provided with through holes (641) for fixing the short shaft (61), the short shaft (61) is fixed in the through hole (641) through the long hole (631), the positions of the different sides of both ends of the rotating body (63) are respectively provided with an arc-shaped bulge (633) and a block-shaped bulge (632) for pressing the water inlet pipe (4), the block-shaped protrusion (632) and the second protrusion (112) can be pressed and separated in a contact manner; one end of the spring (62) is arranged on the rotating body (63), and the other end of the spring is arranged on the base body (64); when second arch (112) contact oppresses when cubic arch (632), arc arch (633) break away from inlet tube (4), spring (62) produce elastic deformation, produce the tensile force, work as second arch (112) break away from when cubic arch (632), the tensile force that spring (62) produced will arc arch (633) pull back home position, oppress inlet tube (4).

5. Pressure relief device of a capsule coffee machine according to claim 4, characterized in that both ends of said stud (61) are arranged with interference fit in said through hole (641) of said base body (64).

6. Pressure relief device of a capsule coffee machine according to claim 1, characterized in that the side of said first bulge (111) in contact with said pressure relief tube (3) is of an arc-shaped configuration.

7. Pressure relief device of a capsule coffee machine according to claim 1, characterized in that said upper cover (2) is provided with a forward switch (5) and a reverse switch (7) for controlling the forward and reverse rotation of said motor (12).

8. Pressure relief device of a capsule coffee machine according to claim 3, characterized in that said rotating member (11), said driven gear (10), said hollow shaft (13) and said brewer (14) are all of cylindrical configuration and are concentrically arranged within a cylindrical cavity of said brewer holder (15).

9. Pressure relief device of a capsule coffee machine according to claim 2, characterized in that a placement groove (152) for sliding the coffee funnel (16) inside the brewer holder (15) is provided below the brewer holder (15).

10. A capsule coffee machine, characterized in that it comprises a pressure relief device of a capsule coffee machine according to any one of claims 1 to 9.